EP2652402A2 - Gas valve unit comprising a lift deflection system - Google Patents
Gas valve unit comprising a lift deflection systemInfo
- Publication number
- EP2652402A2 EP2652402A2 EP11794707.7A EP11794707A EP2652402A2 EP 2652402 A2 EP2652402 A2 EP 2652402A2 EP 11794707 A EP11794707 A EP 11794707A EP 2652402 A2 EP2652402 A2 EP 2652402A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- shut
- valve
- actuating shaft
- valve unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/007—Regulating fuel supply using mechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
- F23K5/007—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/16—Fuel valves variable flow or proportional valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/18—Groups of two or more valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/22—Fuel valves cooperating with magnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/24—Valve details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/10—High or low fire
Definitions
- the invention relates to a gas valve unit for adjusting a gas burner of a gas appliance, in particular a gas cooking appliance, supplied gas volume flow, wherein the gas valve unit comprises a valve housing and an actuating shaft which protrudes with an operating portion of the valve housing, and wherein in the valve housing, a shut-off valve is formed.
- Gas valve units of this type are often referred to as secure gas valves.
- the gas valve unit has a variable opening cross-section, which can be adjusted via the actuating shaft.
- the opening cross-section can be adjusted continuously. From the opening cross section directly depends on the size of the gas valve unit flowing through the gas flow rate and thus the flame size at the gas burner. As a rule, in the case of generic gas valve units, the opening cross section can be set to zero, that is to say the gas valve unit is completely closed.
- the gas valve unit has an independent of the setting of the opening cross-section operable shut-off valve.
- the shut-off valve usually has an open switching position and a closed switching position, but no intermediate positions. When the shut-off valve is closed, the gas flow through the gas valve unit is completely interrupted. On the other hand, the open shut-off valve has no influence on the opening cross-section of the gas valve unit.
- the shut-off valve serves, on the one hand, to provide redundant safety for complete closing of the gas valve unit. On the other hand, it is possible to automatically actuate the shut-off valve, for example, in response to the signal of a flame sensor.
- Known gas valve units of the type mentioned are usually designed as a chick valve.
- the opening cross-section is set in dependence on the rotational position of a plug rotatable in a valve seat.
- the actuating shaft is arranged coaxially with the chick and connected thereto.
- the opening cross section of the gas valve unit is made by turning the actuating shaft set.
- the shut-off valve can be opened by pressing the same actuating shaft.
- Gas valve units of this type often have an unfavorable switching behavior.
- the opening cross-section can often be set only inaccurate and not reproducible.
- the present invention has for its object to provide a generic gas valve unit with improved switching behavior available.
- This object is achieved in that in the valve housing at least two open-close valves are formed, wherein the open-close valves are actuated by rotating the actuating shaft and the shut-off valve is actuated by axial displacement of the actuating shaft.
- the open-close valves serve to adjust the opening cross-section of the gas valve unit, and thus the size of the gas flow rate flowing through the gas valve unit. This can be done, for example, by opening and closing the open-close valves one after the other.
- the control of the open-close valves by turning the actuating shaft.
- the gas valve unit has an additional shut-off valve, which completely interrupts the gas flow through the valve unit in the closed state.
- the shut-off valve In the open state, the shut-off valve has such a large opening cross-section that the size of the gas volume flow is determined exclusively by opening and closing the open-close valves.
- the shut-off valve is actuated by axially moving the actuating shaft.
- both the open-close valves and the shut-off valve can be actuated via the same actuating shaft.
- each open-valve is associated with exactly one throttle point.
- the shut-off valve is arranged in the region of a gas inlet of the gas valve unit.
- the shut-off valve preferably has a movable shut-off element.
- the shut-off element can be formed, for example, by an axially movable valve disk which, in the closed state, presses against an annular valve seat.
- the movable shut-off element of the shut-off valve is biased in the closing direction, in particular by means of spring force. As a result, the shut-off valve is always closed in the inoperative state of the gas appliance.
- the movable shut-off of the shut-off valve is movable by pressing the actuating shaft against the bias in an open position.
- the pressing movement of the actuating shaft is transmitted directly or indirectly to the shut-off.
- the shut-off element In the open position, the shut-off element is lifted from the valve seat of the shut-off valve and thereby releases the gas path from the gas inlet of the valve housing in the direction of the open-close valves.
- the shut-off valve has a magnetic coil with which a force acting in the opening direction can likewise be exerted on the shut-off element.
- the magnetic coil can be acted upon by, for example, a thermocouple or an electronic controller with voltage.
- the magnetic coil is designed such that the shut-off element already in the open position can be held in this position by means of the force of the magnetic coil. On the other hand, it is not possible to move the shut-off element from a closed position to the open position by means of the force of the magnetic coil.
- the magnetic coil is coupled to a flame sensor in the region of a gas burner in such a way that the shut-off valve is kept open when a gas flame burns on the gas burner. After extinguishing the gas flame is the Power supply to the solenoid interrupted and the shut-off valve closes automatically by spring force.
- a deflection device which transmits an axial movement of the actuating shaft in a substantially perpendicular axial movement of the shut-off of the shut-off valve.
- the direction of movement of the shut-off element is perpendicular to the axial actuating direction of the actuating shaft.
- the deflection device has a first sliding element, which is arranged on the actuating shaft in the region of the operating section opposite end of the actuating shaft.
- the first sliding element is moved along with an axial movement of the actuating shaft with this.
- the first sliding element and the actuating shaft may, for example, be made in one piece.
- the first sliding element is designed as a first conical element, such that a tip of the first conical element points away from the operating section of the actuating shaft.
- the first conical element moves in the direction of its tip.
- the spatial position of the first conical element does not change, since it is rotated about its axis of symmetry.
- the deflection device has a second sliding element, which is in contact with the first sliding element at least during a pressing of the actuating shaft.
- the second sliding element slides on the first sliding element.
- the second sliding element is designed as a second conical element whose central axis is arranged substantially perpendicular to the actuating shaft and whose tip points in the direction of the first sliding element.
- the formation of the second sliding element as a second conical element has the advantage that the rotational position of the second conical element with respect to its axis of symmetry has no effect on the operation of the deflection device.
- the first sliding element and the second sliding element are designed and arranged such that an axial displacement of the actuating shaft as a result of a pressing on the operating section is converted into an axial displacement of the second sliding element in the direction away from the actuating shaft.
- the second sliding element is connected to the shut-off element of the shut-off valve in such a way that an axial movement of the second sliding element in the direction away from the actuating shaft is transferred to the shut-off element.
- the shut-off element of the shut-off valve is thus lifted off its valve seat, thereby opening the shut-off valve.
- an operating device for the open-close valves is provided, which is coupled by means of a coupling device at an end located within the valve housing end of the actuating shaft to the actuating shaft.
- the actuator includes, for example, a permanent magnet that can be moved relative to the open-close valves.
- a rotational movement of the actuating shaft is transmitted by means of the coupling device to the actuator for the open-close valves.
- the coupling device is designed such that the actuator is rotationally rigidly coupled to the actuating shaft.
- the coupling device is designed such that an axial displacement of the actuating shaft is not transmitted to the actuator.
- the coupling device has a slot-shaped recess on an end face of the end of the actuating shaft opposite the operating section.
- the coupling device comprises a flat carrier, which engages in the slot-shaped recess.
- the engaging in the slot-shaped recess flat driver allows the transmission of torque from the actuating shaft to the actuator of the open-close valves.
- the compensation of an axial movement the actuating shaft is effected in that the flat driver is more or less inserted into the slot-shaped recess.
- the recess is arranged in a base of a third conical element, which is formed on the actuating shaft in the region of the control section opposite end of the actuating shaft, such that a tip of the third conical element facing in the direction of the operating portion of the actuating shaft and with a Tip of the first cone-shaped element is connected.
- the formation of the end of the actuating shaft as a conical element has the advantage that the spatial extent of a conical element does not change during a rotation of the actuating shaft. There is thus no risk of unintentional movement of the second sliding element in that it accidentally contacts the third conical element.
- FIG. 7 shows the gas valve unit with the shut-off valve open and the open-to-open valve open
- FIG. 8 shows the opened gas valve unit with the actuating shaft not pressed
- FIG. 9 shows the shut-off valve in the closed state
- FIG. 10 shows the opened shut-off valve
- FIG. 11 shows the opened shut-off valve with the operating shaft pressed far
- Figures 1 to 3 show the switching arrangement of the on-off valves 3 (3.1 to 3.5) and the throttle bodies 4 (4.1 to 4.5) of the gas valve unit. However, the shut-off valve according to the invention is not shown here.
- a gas inlet 1 with which the gas valve unit is connected for example to a main gas line of a gas cooking appliance.
- the gas inlet 1 is provided for combustion gas with a constant pressure of, for example, 20 millibar or 50 millibar.
- a gas outlet 2 of the gas valve unit a leading example, to a gas burner of the gas cooking appliance gas line is connected.
- the gas inlet 1 is connected via a gas inlet space 9 of the gas valve unit with the input side of the present in the present embodiment, five open-to-valves 3 (3.1 to 3.5).
- the open-close valves 3 By opening the open-close valves 3, the gas inlet 1 is in each case connected to a specific section of a throttle section 5, into which the gas flows via the open on-off valve 3.
- the throttle section 5 comprises an inlet section 7, into which the first open-close valve 3.1 opens.
- the further open-close valves 3.2 to 3.5 each open into a connecting section 6 (6.1 to 6.4) of the throttle section 5.
- the transition between the input section 7 and the first connecting section 6.1, and the transitions between two adjacent of the connecting sections 6.1 to 6.4 are respectively formed by a throttle 4 (4.1 to 4.5).
- the last restrictor 4.5 connects the last connection section 6.4 the gas outlet 2.
- the throttle bodies 4.1 to 4.5 have a sequentially increasing opening cross-section.
- the flow cross section of the last throttle point 4.5 may be chosen so large that the last throttle point 4.5 has virtually no throttle function.
- the operation of the open-close valves 3 by means of a permanent magnet 8, which is displaceable along the row of open-close valves 3.
- the force for opening the respective on-off valve 3 is directly from the magnetic force of the permanent magnet
- This magnetic force opens the respective on-off valve 3 against a spring force.
- Figure 2 shows the schematic circuit arrangement in which the permanent magnet 8 is moved to the right in the drawing so that both the first open-close valve 3.1 and the second open-close valve 3.2 are open.
- Figure 3 shows the schematic circuit arrangement of the gas valve unit in the maximum open position.
- the permanent magnet 8 is in its end position on the right side in the drawing.
- the last open-close valve 3.5 is opened at this position of the permanent magnet 8.
- This last restrictor 4.5 may have such a large flow cross-section that virtually no throttling of the gas flow occurs and the gas can flow through the gas valve unit virtually unthrottled.
- FIG. 4 shows schematically a structural design of a gas valve unit with a switching arrangement according to figure 1 to 3.
- the shut-off valve according to the invention is also not shown here. 4 shows a valve body 20, in which the gas inlet 1 of the gas valve unit is designed. Inside the valve body 20 is a gas inlet space 9 connected to the gas inlet 1.
- Shut-off bodies 10 of the open-close valves 3 are guided in the valve body 20, such that they can move up and down in the drawing.
- Each shut-off body 10 is biased by a spring 11 in the drawing below. By means of the force of the permanent magnet 8, each shut-off body 10 can be moved against the force of the spring 1 1 in the drawing above.
- the springs 11 press the shut-off body on a valve sealing plate 12, so that the shut-off body 10 in the valve sealing plate 12 openings 12a seal gas-tight.
- a pressure plate 13 is arranged, with openings 13 a, which correspond to the openings 12 a in the valve sealing plate 12.
- the openings 13a in the pressure plate 13 open into openings 14a in a first gas distribution plate 14.
- a throttle plate 15 having a plurality of throttle openings 18.
- Each of Throttling points 4.1 to 4.4 is formed by two throttle openings 18.
- the two throttle openings 18 belonging to a throttle point 4.1 to 4.4 are connected to one another in each case by means of the openings 16a in a second gas distribution plate 16.
- the openings 14a in the first gas distribution plate connect the adjacent throttle openings 18 of two adjacent throttle points 4.1 to 4.5.
- the last orifice 4.5 consists of only one throttle opening 18, which opens via a corresponding opening 16a in the second gas distribution plate 16 in the gas outlet 2 of the gas valve unit.
- the permanent magnet 8 In the switching position according to Figure 4, the permanent magnet 8 is in an end position in which all open-close valves 3 are closed. The gas valve unit is thus closed overall. The gas volume flow is equal to zero. Starting from this switching position, the permanent magnet 8 is moved to the right in the drawing, whereby each arranged under the permanent magnet 8 open-close valves 3 are opened.
- FIG. 5 shows the schematic structure of the gas valve arrangement according to the invention.
- the example, five open-close valves 3 are arranged along a circular arc around the actuating shaft 31.
- the operating section 29 At the upper end of the actuating shaft 31 is the operating section 29, on the example, a rotary knob can be plugged.
- an actuating device 25 is arranged, at the outer end of the permanent magnet 8 is arranged.
- the permanent magnet 8 moves along a circular arc past the open-close valves 3. In each case exactly the open-close valves 3, which are located directly above the permanent magnet 8, are opened by the magnetic force of the permanent magnet 8.
- a knob which can be grasped directly by the operator can be attached.
- a cover 30 is formed, in which, from bottom to top, the valve sealing plate 12, the pressure plate 13, the first gas distribution plate 14, the throttle plate 15 and the second gas distribution plate 16 are arranged.
- the plates 12 to 16 are accessible by removing the cover 30. Access to the Plates 12 to 16 takes place from above, ie from the same side from which the actuating shaft 31 protrudes from the valve housing 20.
- the throttle plate 15 is replaced.
- the throttle plate 15 are the throttle openings 18, which set the size of the gas flow significantly. After removing the cover up, all plates 12 to 16 are in the cover 30.
- the arrangement for actuating the shut-off valve 40 which is not shown in this figure, can also be seen.
- This comprises a first sliding element 41, which is fastened to the actuating shaft 31.
- the first sliding element 41 is in contact with a second sliding element 42, which is coupled via a connecting element 45 to a valve body of the shut-off valve.
- Both sliding elements 41, 42 are formed by conical bodies.
- a third conical body 43 serves as part of a coupling device 26, with which a rotational movement of the actuating shaft 31 is transmitted to the actuator 25.
- the coupling device 26 essentially consists of a driver 27, which engages in a slot-shaped recess 28.
- the gas valve unit In the position shown in Figure 5, the gas valve unit is in the fully closed position.
- the rotational position of the actuating shaft 31 is selected such that the permanent magnet 8 is not below an open-close valve 3 and thus all open-close valves 3 are closed.
- the actuating shaft 31 is not pressed in the axial direction.
- the second slider 42 is in a left stop position. Due to the shape of the first sliding member 41 as a conical body has an exclusive rotational movement of the actuating shaft 31 and thus the first sliding member 41 has no influence on the position of the second sliding member 42.
- the lower end of the actuating shaft 31 is also of a (third) conical Body 43 formed.
- the switching position according to FIG. 5 there is no gas in the valve housing 20 of the gas valve unit due to the closed shut-off valve 40. Now, when the switching shaft 31 is pressed down in the axial direction, the shut-off valve 40 opens and the valve housing 20 fills with gas.
- FIG. 10 This state of the gas valve unit is shown in FIG.
- the first sliding member 41 has the second sliding member 42 is pressed with the connecting element 45 to the right in the drawing.
- the connecting element 45 acts directly on the shut-off element 44 of the shut-off valve 40 (see FIG. 10), so that it is open.
- the lower part of the gas valve unit in the drawing is thereby filled with gas (see dotted areas).
- the on-off valves 3 are still closed, so that the flow cross-section of the gas valve unit is still zero.
- FIG. 7 shows a further operating position of the gas valve unit, in which the shut-off valve 40 is opened by pressing in the actuating shaft 31 and, moreover, one of the open-close valves 3 is opened by means of the permanent magnet 8. Gas now also flows into the region above the open-close valve in the direction of the gas outlet 2 through this open on-off valve 3.
- the shut-off valve 40 is mechanically moved via the first sliding element 41, the second sliding element 42 and the connecting element 45 in FIG Held open position.
- Figure 8 shows an operating position of the gas valve unit, in which the shut-off element 44 of the check valve 40 is held in the open position by means of the force of an electromagnet, not shown in the present figure.
- the actuating shaft 32 is here in a non-depressed position, so that the first sliding element 41 exerts no force on the second sliding element 42. In this position, the gas valve unit is during operation when a flame is burning on the gas burner connected to the gas valve unit.
- the type of actuation of the shut-off valve 40 will be described in more detail with reference to Figures 9, 10 and 11.
- the first sliding element 41, the second sliding element 42, a connecting element 45 formed by a spring, the shut-off element 44 and a magnet unit 50 can be seen here.
- the closed rest position of the shut-off valve 40 is ensured by the spring 51 acting on the shut-off body 10.
- the actuating shaft 31 is not pressed in.
- the check valve 40 is closed by the force of the spring 51.
- the connecting element 45 has a distance to the shut-off body 10.
- the actuating shaft 31 is pressed in, so that the second sliding element 42 with the connecting element 45 is shifted to the left in the drawing and the shut-off element 44 lifts from its valve seat counter to the force of the spring 51.
- the shut-off valve 40 can thereby be traversed by gas.
- the connecting element 45 is designed as a spring.
- the spring forming the connecting element 45 is substantially stiffer than the spring 51 of the shut-off valve 40.
- the design of the connecting element 45 as a spring serves, in particular, to prevent damage to the shut-off valve 40 when the actuating shaft 31 is pressed with an excessively large force.
- FIG. 12 shows a gas valve unit according to the invention in cross section. Shown are the gas inlet 1, which opens directly into the shut-off valve 40. Of the shut-off valve 40 in particular the shut-off body 10, the spring 51 and the magnet unit 50 can be seen.
- the connecting element 45 designed as a spring is suitable for transmitting a pressure force from the second sliding element 42 to the shut-off body 10.
- the second Slide member 42 slides on the first sliding member 41, which is formed from the actuating shaft 31.
- the third conical element 43 with the coupling device 26, which transmits a rotational movement of the actuating shaft 31 to the permanent magnet 8.
- the permanent magnet 8 opens by means of its magnetic force in each case the directly above it located on-off valve. 3
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Mechanically-Actuated Valves (AREA)
- Magnetically Actuated Valves (AREA)
- Lift Valve (AREA)
Abstract
Description
Gasventileinheit mit einem Hubumlenkungssystem Gas valve unit with a Hubumlenkungssystem
Die Erfindung betrifft eine Gasventileinheit zum Einstellen eines einem Gasbrenner eines Gasgeräts, insbesondere eines Gaskochgeräts, zugeführten Gasvolumenstroms, wobei die Gasventileinheit ein Ventilgehäuse und eine Betätigungswelle aufweist, welche mit einem Bedienabschnitt aus dem Ventilgehäuse heraussteht, und wobei in dem Ventilgehäuse ein Absperrventil ausgebildet ist. The invention relates to a gas valve unit for adjusting a gas burner of a gas appliance, in particular a gas cooking appliance, supplied gas volume flow, wherein the gas valve unit comprises a valve housing and an actuating shaft which protrudes with an operating portion of the valve housing, and wherein in the valve housing, a shut-off valve is formed.
Gasventileinheiten dieser Bauart werden häufig auch als gesicherte Gasventile bezeichnet. Die Gasventileinheit besitzt einen veränderlichen Öffnungsquerschnitt, der über die Betätigungswelle eingestellt werden kann. Der Öffnungsquerschnitt kann hierbei stufenlos eingestellt werden. Von dem Öffnungsquerschnitt hängt direkt die Größe des die Gasventileinheit durchströmenden Gasvolumenstroms und damit die Flammengröße an dem Gasbrenner ab. In der Regel kann bei gattungsgemäßen Gasventileinheiten der Öffnungsquerschnitt auf null eingestellt werden, die Gasventileinheit also vollständig geschlossen werden. Gas valve units of this type are often referred to as secure gas valves. The gas valve unit has a variable opening cross-section, which can be adjusted via the actuating shaft. The opening cross-section can be adjusted continuously. From the opening cross section directly depends on the size of the gas valve unit flowing through the gas flow rate and thus the flame size at the gas burner. As a rule, in the case of generic gas valve units, the opening cross section can be set to zero, that is to say the gas valve unit is completely closed.
Zusätzlich weist die Gasventileinheit ein unabhängig von der Einstellung des Öffnungsquerschnitts betätigbares Absperrventil auf. Das Absperrventil besitzt in der Regel eine offene Schaltstellung und eine geschlossene Schaltstellung, jedoch keine Zwischenstellungen. Bei geschlossenem Absperrventil ist der Gasstrom durch die Gasventileinheit vollständig unterbrochen. Das geöffnete Absperrventil hat hingegen keinen Einfluss auf den Öffnungsquerschnitt der Gasventileinheit. Das Absperrventil dient zum einen dazu, ein vollständiges Schließen der Gasventileinheit redundant sicher zu stellen. Zum anderen ist es möglich, das Absperrventil beispielsweise in Abhängigkeit von dem Signal eines Flammensensors automatisch zu betätigen. In addition, the gas valve unit has an independent of the setting of the opening cross-section operable shut-off valve. The shut-off valve usually has an open switching position and a closed switching position, but no intermediate positions. When the shut-off valve is closed, the gas flow through the gas valve unit is completely interrupted. On the other hand, the open shut-off valve has no influence on the opening cross-section of the gas valve unit. The shut-off valve serves, on the one hand, to provide redundant safety for complete closing of the gas valve unit. On the other hand, it is possible to automatically actuate the shut-off valve, for example, in response to the signal of a flame sensor.
Bekannte Gasventileinheiten der eingangs genannten Art sind in der Regel als Kükenventil ausgeführt. Hier wird der Öffnungsquerschnitt in Abhängigkeit von der Rotationsposition eines in einem Ventilsitz drehbaren Kükens eingestellt. Die Betätigungswelle ist koaxial zu dem Küken angeordnet und mit diesem verbunden. Der Öffnungsquerschnitt der Gasventileinheit wird durch Drehen der Betätigungswelle eingestellt. Das Absperrventil kann durch Drücken derselben Betätigungswelle geöffnet werden. Known gas valve units of the type mentioned are usually designed as a chick valve. Here, the opening cross-section is set in dependence on the rotational position of a plug rotatable in a valve seat. The actuating shaft is arranged coaxially with the chick and connected thereto. The opening cross section of the gas valve unit is made by turning the actuating shaft set. The shut-off valve can be opened by pressing the same actuating shaft.
Gasventileinheiten dieser Bauart besitzen häufig ein ungünstiges Schaltverhalten. Insbesondere lässt sich der Öffnungsquerschnitt häufig nur ungenau und nicht reproduzierbar einstellen. Gas valve units of this type often have an unfavorable switching behavior. In particular, the opening cross-section can often be set only inaccurate and not reproducible.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Gasventileinheit mit verbessertem Schaltverhalten zur Verfügung zu stellen. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass in dem Ventilgehäuse mindestens zwei Auf-Zu-Ventile ausgebildet sind, wobei die Auf-Zu-Ventile durch Drehen der Betätigungswelle betätigbar sind und das Absperrventil durch axiales Verschieben der Betätigungswelle betätigbar ist. Die Auf-Zu-Ventile dienen dazu, den Öffnungsquerschnitt der Gasventileinheit einzustellen, und damit die Größe des die Gasventileinheit durchströmenden Gasvolumenstroms. Dies kann beispielsweise dadurch erfolgen, dass die Auf-Zu-Ventile nacheinander geöffnet und wieder geschlossen werden. Die Ansteuerung der Auf-Zu-Ventile erfolgt durch Drehen der Betätigungswelle. Darüber hinaus weist die Gasventileinheit ein zusätzliches Absperrventil auf, das in geschlossenem Zustand den Gasstrom durch die Ventileinheit vollständig unterbricht. In geöffnetem Zustand weist das Absperrventil einen derart großen Öffnungsquerschnitt auf, dass die Größe des Gasvolumenstroms ausschließlich durch Öffnen und Schließen der Auf-Zu-Ventile festgelegt ist. Das Absperrventil wird durch axiales Bewegen der Betätigungswelle betätigt. Damit können über dieselbe Betätigungswelle sowohl die Auf- Zu-Ventile als auch das Absperrventil betätigt werden. The present invention has for its object to provide a generic gas valve unit with improved switching behavior available. This object is achieved in that in the valve housing at least two open-close valves are formed, wherein the open-close valves are actuated by rotating the actuating shaft and the shut-off valve is actuated by axial displacement of the actuating shaft. The open-close valves serve to adjust the opening cross-section of the gas valve unit, and thus the size of the gas flow rate flowing through the gas valve unit. This can be done, for example, by opening and closing the open-close valves one after the other. The control of the open-close valves by turning the actuating shaft. In addition, the gas valve unit has an additional shut-off valve, which completely interrupts the gas flow through the valve unit in the closed state. In the open state, the shut-off valve has such a large opening cross-section that the size of the gas volume flow is determined exclusively by opening and closing the open-close valves. The shut-off valve is actuated by axially moving the actuating shaft. Thus, both the open-close valves and the shut-off valve can be actuated via the same actuating shaft.
Mit besonderem Vorteil sind in dem Ventilgehäuse mindestens zwei Drosselstellen mit jeweils mindestens einer Drosselöffnung ausgebildet, die in Abhängigkeit von der Schaltstellung der Auf-Zu-Ventile mit Gas durchströmbar sind. Bevorzugt ist jedem Auf- Zu-Ventil genau eine Drosselstelle zugeordnet. Bei geöffnetem Auf-Zu-Ventil kann Gas durch diese Drosselstelle strömen, bei geschlossenem Auf-Zu-Ventil kann die diesem Auf-Zu-Ventil zugeordnete Drosselstelle nicht direkt von dem Gaseingang aus mit Gas durchströmt werden, sondern allenfalls über einen Umweg durch andere Drosselstellen. Bevorzugt ist das Absperrventil im Bereich eines Gaseingangs der Gasventileinheit angeordnet. Damit steht bei geschlossenem Absperrventil an keinem der Auf-Zu-Ventile und an keiner Drosselstelle Gas an. Sofern sich im Bereich der Auf-Zu-Ventile oder der Drosselstellen Leckstellen befinden sollten, ist ein Ausströmen von Gas aus diesen Leckstellen bei geschlossenem Absperrventil sicher verhindert. With particular advantage, at least two throttle points, each having at least one throttle opening are formed in the valve housing, which are traversed in dependence on the switching position of the open-close valves with gas. Preferably, each open-valve is associated with exactly one throttle point. When open on-off valve gas can flow through this throttle point, with closed on-off valve that throttle valve associated with this on-off valve can not be directly flowed through from the gas inlet with gas, but at most via a detour through other throttle points , Preferably, the shut-off valve is arranged in the region of a gas inlet of the gas valve unit. Thus, when the shut-off valve is closed, there is no gas at any of the open-close valves and no throttling point. If there are leaks in the area of the open-close valves or the throttling points, an outflow of gas from these leaks is reliably prevented when the shut-off valve is closed.
Bevorzugt weist das Absperrventil ein bewegbares Absperrelement auf. Das Absperrelement kann beispielsweise von einem axial beweglichen Ventilteller gebildet sein, das in geschlossenem Zustand auf einen ringförmigen Ventilsitz drückt. Das bewegbare Absperrelement des Absperrventils ist in Schließrichtung vorgespannt, insbesondere mittels Federkraft. Hierdurch ist das Absperrventil im Außerbetriebszustand des Gasgeräts immer geschlossen. The shut-off valve preferably has a movable shut-off element. The shut-off element can be formed, for example, by an axially movable valve disk which, in the closed state, presses against an annular valve seat. The movable shut-off element of the shut-off valve is biased in the closing direction, in particular by means of spring force. As a result, the shut-off valve is always closed in the inoperative state of the gas appliance.
Das bewegbare Absperrelement des Absperrventils ist durch Drücken der Betätigungswelle entgegen der Vorspannung in eine Offenstellung bewegbar. Die Drückbewegung der Betätigungswelle wird dabei direkt oder indirekt auf das Absperrelement übertragen. In Offenstellung ist das Absperrelement von dem Ventilsitz des Absperrventils abgehoben und gibt dadurch den Gasweg von dem Gaseingang des Ventilgehäuses in Richtung zu den Auf-Zu-Ventilen frei. The movable shut-off of the shut-off valve is movable by pressing the actuating shaft against the bias in an open position. The pressing movement of the actuating shaft is transmitted directly or indirectly to the shut-off. In the open position, the shut-off element is lifted from the valve seat of the shut-off valve and thereby releases the gas path from the gas inlet of the valve housing in the direction of the open-close valves.
Weiter ist das bewegbare Absperrelement des Absperrventils mittels der Kraft einer Magnetspule entgegen der Federkraft in Offenstellung haltbar. Das Absperrventil weist eine Magnetspule auf, mit der ebenfalls eine in Öffnungsrichtung wirkende Kraft auf das Absperrelement ausgeübt werden kann. Die Magnetspule kann dabei beispielsweise von einem Thermoelement oder von einer elektronischen Steuerung mit Spannung beaufschlagt sein. Die Magnetspule ist dabei derart ausgelegt, dass das bereits in Offenstellung befindliche Absperrelement mittels der Kraft der Magnetspule in dieser Position gehalten werden kann. Hingegen ist es nicht möglich, mittels der Kraft der Magnetspule das Absperrelement von einer geschlossenen Stellung in die Offenstellung zu bewegen. Die Magnetspule ist derart an einen Flammensensor im Bereich eines Gasbrenners gekoppelt, dass das Absperrventil dann offengehalten wird, wenn an dem Gasbrenner eine Gasflamme brennt. Nach einem Erlöschen der Gasflamme ist die Stromzufuhr zu der Magnetspule unterbrochen und das Absperrventil schließt selbsttätig mittels Federkraft. Next, the movable shut-off of the shut-off valve by means of the force of a magnetic coil against the spring force in the open position preserved. The shut-off valve has a magnetic coil with which a force acting in the opening direction can likewise be exerted on the shut-off element. The magnetic coil can be acted upon by, for example, a thermocouple or an electronic controller with voltage. The magnetic coil is designed such that the shut-off element already in the open position can be held in this position by means of the force of the magnetic coil. On the other hand, it is not possible to move the shut-off element from a closed position to the open position by means of the force of the magnetic coil. The magnetic coil is coupled to a flame sensor in the region of a gas burner in such a way that the shut-off valve is kept open when a gas flame burns on the gas burner. After extinguishing the gas flame is the Power supply to the solenoid interrupted and the shut-off valve closes automatically by spring force.
Gemäß einer zweckmäßigen Ausführung der Erfindung ist eine Umlenkvorrichtung vorgesehen, die eine axiale Bewegung der Betätigungswelle in eine dazu im Wesentlichen rechtwinkelige axiale Bewegung des Absperrelements des Absperrventils überträgt. Die Bewegungsrichtung des Absperrelements ist dabei senkrecht zu der axialen Betätigungsrichtung der Betätigungswelle. Eine derartige Bauweise der Gasventileinheit wird gewählt, um die Abmessung des Gehäuses der Gasventileinheit in axialer Richtung der Betätigungswelle zu minimieren. According to an expedient embodiment of the invention, a deflection device is provided, which transmits an axial movement of the actuating shaft in a substantially perpendicular axial movement of the shut-off of the shut-off valve. The direction of movement of the shut-off element is perpendicular to the axial actuating direction of the actuating shaft. Such a construction of the gas valve unit is selected to minimize the dimension of the housing of the gas valve unit in the axial direction of the actuating shaft.
Die Umlenkvorrichtung weist ein erstes Gleitelement auf, das an der Betätigungswelle im Bereich des dem Bedienabschnitt entgegengesetzten Endes der Betätigungswelle angeordnet ist. Das erste Gleitelement wird bei einer axialen Bewegung der Betätigungswelle mit dieser mitbewegt. Das erste Gleitelement und die Betätigungswelle können beispielsweise einteilig ausgeführt sein. The deflection device has a first sliding element, which is arranged on the actuating shaft in the region of the operating section opposite end of the actuating shaft. The first sliding element is moved along with an axial movement of the actuating shaft with this. The first sliding element and the actuating shaft may, for example, be made in one piece.
Bevorzugt ist das erste Gleitelement als erstes kegelförmiges Element ausgeführt, derart, dass eine Spitze des ersten kegelförmigen Elements von dem Bedienabschnitt der Betätigungswelle weg weist. Bei einem Drücken der Betätigungswelle bewegt sich das erste kegelförmige Element in Richtung seiner Spitze. Bei einem Drehen der Betätigungswelle ändert sich hingegen die räumliche Lage des ersten kegelförmigen Elements nicht, da es dabei um seine Symmetrieachse gedreht wird. Preferably, the first sliding element is designed as a first conical element, such that a tip of the first conical element points away from the operating section of the actuating shaft. Upon depression of the actuating shaft, the first conical element moves in the direction of its tip. When turning the actuating shaft, however, the spatial position of the first conical element does not change, since it is rotated about its axis of symmetry.
Bevorzugt weist die Umlenkvorrichtung ein zweites Gleitelement auf, das sich zumindest während eines Drückens der Betätigungswelle in Kontakt mit dem ersten Gleitelement befindet. Hierbei gleitet das zweite Gleitelement auf dem ersten Gleitelement ab. Preferably, the deflection device has a second sliding element, which is in contact with the first sliding element at least during a pressing of the actuating shaft. In this case, the second sliding element slides on the first sliding element.
Bevorzugt ist das zweite Gleitelement als zweites kegelförmiges Element ausgebildet, dessen Mittelachse im Wesentlichen senkrecht zu der Betätigungswelle angeordnet ist und dessen Spitze in Richtung des ersten Gleitelements weist. Die Ausbildung des zweiten Gleitelements als zweites kegelförmiges Element hat den Vorteil, dass die Rotationsposition des zweiten kegelförmigen Elements bezüglich seiner Symmetrieachse keine Auswirkungen auf die Funktionsweise der Umlenkvorrichtung hat. Das erste Gleitelement und das zweite Gleitelement sind derart ausgebildet und angeordnet, dass ein axiales Verschieben der Betätigungswelle in Folge eines Drückens auf den Bedienabschnitt in ein axiales Verschieben des zweiten Gleitelements in Richtung von der Betätigungswelle weg umgesetzt wird. Preferably, the second sliding element is designed as a second conical element whose central axis is arranged substantially perpendicular to the actuating shaft and whose tip points in the direction of the first sliding element. The formation of the second sliding element as a second conical element has the advantage that the rotational position of the second conical element with respect to its axis of symmetry has no effect on the operation of the deflection device. The first sliding element and the second sliding element are designed and arranged such that an axial displacement of the actuating shaft as a result of a pressing on the operating section is converted into an axial displacement of the second sliding element in the direction away from the actuating shaft.
Weiter steht das zweite Gleitelement derart mit dem Absperrelement des Absperrventils in Wrkverbindung, dass eine axiale Bewegung des zweiten Gleitelements in Richtung von der Betätigungswelle weg auf das Absperrelement übertragen wird. Bei einem Drücken der Betätigungswelle wird damit das Absperrelement des Absperrventils von seinem Ventilsitz abgehoben und dadurch das Absperrventil geöffnet. Furthermore, the second sliding element is connected to the shut-off element of the shut-off valve in such a way that an axial movement of the second sliding element in the direction away from the actuating shaft is transferred to the shut-off element. Upon depression of the actuating shaft, the shut-off element of the shut-off valve is thus lifted off its valve seat, thereby opening the shut-off valve.
Weiter ist in der Gasventileinheit eine Betätigungsvorrichtung für die Auf-Zu-Ventile vorgesehen, welche mittels einer Koppelvorrichtung an einem innerhalb des Ventilgehäuses befindlichen Ende der Betätigungswelle an die Betätigungswelle gekoppelt ist. Die Betätigungsvorrichtung umfasst beispielsweise einen Permanentmagnet, welcher relativ zu den Auf-Zu-Ventilen bewegt werden kann. Eine Rotationsbewegung der Betätigungswelle wird mittels der Koppelvorrichtung auf die Betätigungsvorrichtung für die Auf-Zu-Ventile übertragen. Hierbei ist die Koppelvorrichtung derart ausgeführt, dass die Betätigungsvorrichtung drehstarr an die Betätigungswelle gekoppelt ist. Further, in the gas valve unit, an operating device for the open-close valves is provided, which is coupled by means of a coupling device at an end located within the valve housing end of the actuating shaft to the actuating shaft. The actuator includes, for example, a permanent magnet that can be moved relative to the open-close valves. A rotational movement of the actuating shaft is transmitted by means of the coupling device to the actuator for the open-close valves. Here, the coupling device is designed such that the actuator is rotationally rigidly coupled to the actuating shaft.
Weiter ist die Koppelvorrichtung derart ausgeführt, dass ein axiales Verschieben der Betätigungswelle nicht auf die Betätigungsvorrichtung übertragen wird. Further, the coupling device is designed such that an axial displacement of the actuating shaft is not transmitted to the actuator.
Die Koppelvorrichtung weist hierzu eine schlitzförmige Ausnehmung an einer Stirnseite des dem Bedienabschnitt entgegengesetzten Endes der Betätigungswelle auf. For this purpose, the coupling device has a slot-shaped recess on an end face of the end of the actuating shaft opposite the operating section.
Weiter umfasst die Koppelvorrichtung einen flachen Mitnehmer, welcher in die schlitzförmige Ausnehmung eingreift. Der in die schlitzförmige Ausnehmung eingreifende flache Mitnehmer erlaubt die Übertragung eines Drehmoments von der Betätigungswelle auf die Betätigungsvorrichtung der Auf-Zu-Ventile. Der Ausgleich einer axialen Bewegung der Betätigungswelle erfolgt dadurch, dass der flache Mitnehmer mehr oder weniger weit in die schlitzförmige Ausnehmung eingesteckt ist. Furthermore, the coupling device comprises a flat carrier, which engages in the slot-shaped recess. The engaging in the slot-shaped recess flat driver allows the transmission of torque from the actuating shaft to the actuator of the open-close valves. The compensation of an axial movement the actuating shaft is effected in that the flat driver is more or less inserted into the slot-shaped recess.
Mit besonderem Vorteil ist die Ausnehmung in einer Basis eines dritten kegelförmigen Elements angeordnet, das an der Betätigungswelle im Bereich des dem Bedienabschnitt entgegengesetzten Endes der Betätigungswelle ausgebildet ist, derart, dass eine Spitze des dritten kegelförmigen Elements in Richtung des Bedienabschnitts der Betätigungswelle weist und mit einer Spitze des ersten kegelförmigen Elements verbunden ist. Die Ausbildung des Endes der Betätigungswelle als kegelförmiges Element hat den Vorteil, dass sich die räumliche Ausdehnung eines kegelförmigen Elements bei einer Drehung der Betätigungswelle nicht verändert. Es besteht damit keine Gefahr einer unbeabsichtigten Bewegung des zweiten Gleitelements dadurch, dass es mit dem dritten kegelförmigen Element versehentlich in Kontakt tritt. Particularly advantageously, the recess is arranged in a base of a third conical element, which is formed on the actuating shaft in the region of the control section opposite end of the actuating shaft, such that a tip of the third conical element facing in the direction of the operating portion of the actuating shaft and with a Tip of the first cone-shaped element is connected. The formation of the end of the actuating shaft as a conical element has the advantage that the spatial extent of a conical element does not change during a rotation of the actuating shaft. There is thus no risk of unintentional movement of the second sliding element in that it accidentally contacts the third conical element.
Weitere Vorteile und Einzelheiten der Erfindung werden anhand des in den schematischen Figuren dargestellten Ausführungsbeispiels näher erläutert. Dabei zeigt eine schematische Schaltanordnung der Auf-Zu-Ventile und der Drosselstellen mit einem ersten geöffneten Auf-Zu-Ventil, die schematische Schaltanordnung mit zwei geöffneten Auf-Zu-Ventilen, die schematische Schaltanordnung mit dem letzten geöffneten Auf-ZuVentil, einen schematischen Aufbau einer Gasventilanordnung mit geschlossenen Auf-Zu-Ventilen, den schematischen Aufbau der erfindungsgemäßen Gasventileinheit in geschlossenem Zustand, die Gasventileinheit bei geöffnetem Absperrventil, Figur 7 die Gasventileinheit bei geöffnetem Absperrventil und geöffnetem Auf-ZuVentil, Further advantages and details of the invention will be explained in more detail with reference to the embodiment shown in the schematic figures. In this case, a schematic circuit arrangement of the open-close valves and the throttle points with a first open on-off valve, the schematic switching arrangement with two open on-off valves, the schematic circuit arrangement with the last open on-off valve, a schematic structure a gas valve arrangement with closed on-off valves, the schematic structure of the gas valve unit according to the invention in the closed state, the gas valve unit with the shut-off valve open, FIG. 7 shows the gas valve unit with the shut-off valve open and the open-to-open valve open;
Figur 8 die geöffnete Gasventileinheit mit nicht gedrückter Betätigungswelle, FIG. 8 shows the opened gas valve unit with the actuating shaft not pressed,
Figur 9 das Absperrventil in geschlossenem Zustand, FIG. 9 shows the shut-off valve in the closed state,
Figur 10 das geöffnete Absperrventil, FIG. 10 shows the opened shut-off valve,
Figur 11 das geöffnete Absperrventil mit weit gedrückter Betätigungswelle, FIG. 11 shows the opened shut-off valve with the operating shaft pressed far,
Figur 12 die Gasventileinheit in einer Schnittdarstellung. Figure 12, the gas valve unit in a sectional view.
Die Figuren 1 bis 3 zeigen die Schaltanordnung der Auf-Zu-Ventile 3 (3.1 bis 3.5) und der Drosselstellen 4 (4.1 bis 4.5) der Gasventileinheit. Das erfindungsgemäße Absperrventil ist hier jedoch nicht dargestellt. Figures 1 to 3 show the switching arrangement of the on-off valves 3 (3.1 to 3.5) and the throttle bodies 4 (4.1 to 4.5) of the gas valve unit. However, the shut-off valve according to the invention is not shown here.
Zu erkennen ist ein Gaseingang 1 , mit dem die Gasventileinheit beispielsweise an eine Hauptgasleitung eines Gaskochgeräts angeschlossen ist. An dem Gaseingang 1 steht das zur Verbrennung vorgesehene Gas mit einem konstanten Druck von beispielsweise 20 Millibar oder 50 Millibar an. An einen Gasausgang 2 der Gasventileinheit wird eine beispielsweise zu einem Gasbrenner des Gaskochgeräts führende Gasleitung angeschlossen. Der Gaseingang 1 ist über einen Gaseingangsraum 9 der Gasventileinheit mit der Eingangsseite der im vorliegenden Ausführungsbeispiel fünf Auf- Zu-Ventile 3 (3.1 bis 3.5) verbunden. Durch Öffnen der Auf-Zu-Ventile 3 ist der Gaseingang 1 jeweils mit einem bestimmten Abschnitt einer Drosselstrecke 5 verbunden, in den das Gas über das geöffnete Auf-Zu-Ventil 3 einströmt. Die Drosselstrecke 5 umfasst einen Eingangsabschnitt 7, in den das erste Auf-Zu-Ventil 3.1 mündet. Die weiteren Auf-Zu-Ventile 3.2 bis 3.5 münden jeweils in einen Verbindungsabschnitt 6 (6.1 bis 6.4) der Drosselstrecke 5. Der Übergang zwischen dem Eingangsabschnitt 7 und dem ersten Verbindungsabschnitt 6.1 , sowie die Übergänge zwischen zwei benachbarten der Verbindungsabschnitte 6.1 bis 6.4 sind jeweils von einer Drosselstelle 4 (4.1 bis 4.5) gebildet. Die letzte Drosselstelle 4.5 verbindet den letzten Verbindungsabschnitt 6.4 mit dem Gasausgang 2. Die Drosselstellen 4.1 bis 4.5 besitzen einen der Reihe nach zunehmendem Öffnungsquerschnitt. Der Durchflussquerschnitt der letzten Drosselstelle 4.5 kann so groß gewählt sein, dass die letzte Drosselstelle 4.5 praktisch keine Drosselfunktion besitzt. Die Betätigung der Auf-Zu- Ventile 3 erfolgt mittels eines Permanentmagnets 8, der entlang der Reihe der Auf-Zu-Ventile 3 verschiebbar ist. Die Kraft zum Öffnen des jeweiligen Auf-Zu-Ventils 3 wird dabei direkt von der Magnetkraft des PermanentmagnetsEvident is a gas inlet 1, with which the gas valve unit is connected for example to a main gas line of a gas cooking appliance. At the gas inlet 1 is provided for combustion gas with a constant pressure of, for example, 20 millibar or 50 millibar. To a gas outlet 2 of the gas valve unit, a leading example, to a gas burner of the gas cooking appliance gas line is connected. The gas inlet 1 is connected via a gas inlet space 9 of the gas valve unit with the input side of the present in the present embodiment, five open-to-valves 3 (3.1 to 3.5). By opening the open-close valves 3, the gas inlet 1 is in each case connected to a specific section of a throttle section 5, into which the gas flows via the open on-off valve 3. The throttle section 5 comprises an inlet section 7, into which the first open-close valve 3.1 opens. The further open-close valves 3.2 to 3.5 each open into a connecting section 6 (6.1 to 6.4) of the throttle section 5. The transition between the input section 7 and the first connecting section 6.1, and the transitions between two adjacent of the connecting sections 6.1 to 6.4 are respectively formed by a throttle 4 (4.1 to 4.5). The last restrictor 4.5 connects the last connection section 6.4 the gas outlet 2. The throttle bodies 4.1 to 4.5 have a sequentially increasing opening cross-section. The flow cross section of the last throttle point 4.5 may be chosen so large that the last throttle point 4.5 has virtually no throttle function. The operation of the open-close valves 3 by means of a permanent magnet 8, which is displaceable along the row of open-close valves 3. The force for opening the respective on-off valve 3 is directly from the magnetic force of the permanent magnet
8 gebildet. Diese Magnetkraft öffnet das jeweilige Auf-Zu-Ventil 3 entgegen einer Federkraft. 8 formed. This magnetic force opens the respective on-off valve 3 against a spring force.
In der Schaltstellung gemäß Figur 1 ist ausschließlich das erste Auf-Zu-Ventil 3.1 geöffnet. Durch dieses Auf-Zu-Ventil 3.1 strömt das Gas von dem Gaseingangsraum 9 in den Eingangsabschnitt 7 und passiert von dort aus auf dem Weg zum Gasausgang 2 sämtliche Drosselstellen 4 und sämtliche Verbindungsabschnitte 6. Die Menge des durch die Ventileinheit strömenden Gases gibt die Minimalleistung des an die Gasventileinheit angeschlossenen Gasbrenners vor. In the switching position according to FIG. 1, only the first on-off valve 3.1 is opened. Through this on-off valve 3.1, the gas flows from the gas inlet space 9 in the input section 7 and passes from there on the way to the gas outlet 2 all throttle bodies 4 and all connecting portions 6. The amount of gas flowing through the valve unit gives the minimum power of gas burner connected to the gas valve unit.
Figur 2 zeigt die schematische Schaltanordnung, bei der der Permanentmagnet 8 derart nach in der Zeichnung rechts verschoben ist, dass sowohl das erste Auf-Zu-Ventil 3.1 als auch das zweite Auf-Zu-Ventil 3.2 geöffnet sind. Figure 2 shows the schematic circuit arrangement in which the permanent magnet 8 is moved to the right in the drawing so that both the first open-close valve 3.1 and the second open-close valve 3.2 are open.
Durch das geöffnete zweite Auf-Zu-Ventil 3.2 strömt das Gas von dem GaseingangsraumThrough the opened second on-off valve 3.2, the gas flows from the gas inlet space
9 direkt in den ersten Verbindungsabschnitt 6.1 und von dort über die Drosselstellen 4.2 bis 4.5 zum Gasausgang 2. Das zum Gasausgang 2 strömende Gas umgeht aufgrund des geöffneten Auf-Zu-Ventils 3.2 die erste Drosselstelle 4.1. Der Gasvolumenstrom in der Schaltstellung gemäß Figur 2 ist deshalb größer als der Gasvolumenstrom in der Schaltstellung gemäß Figur 1. Der Gaszufluss zu dem ersten Verbindungsabschnitt 6.1 erfolgt praktisch ausschließlich über das zweite Auf-Zu-Ventil 3.2. Aufgrund der offen stehenden Auf-Zu-Ventile 3.1 und 3.2 herrscht in dem Eingangsabschnitt 7 dasselbe Druckniveau wie in dem ersten Verbindungsabschnitt 6.1. Aus dem Eingangsabschnitt 7 strömt über die erste Drosselstelle 4.1 deshalb so gut wie kein Gas in den ersten Verbindungsabschnitt 6.1 nach. Der insgesamt durch die Gasventileinheit strömende Gasvolumenstrom ändert sich daher praktisch nicht, wenn der Permanentmagnet 8 weiter nach in der Zeichnung rechts bewegt wird und dadurch das erste Auf-Zu-Ventil 3.1 bei geöffnetem zweiten Auf-Zu-Ventil 3.2 geschlossen wird. 9 directly into the first connecting section 6.1 and from there via the throttle points 4.2 to 4.5 to the gas outlet 2. The gas flowing to the gas outlet 2 bypasses the first throttle point 4.1 due to the open on-off valve 3.2. The gas volume flow in the switching position according to FIG. 2 is therefore greater than the gas volume flow in the switching position according to FIG. 1. The gas flow to the first connecting section 6.1 takes place virtually exclusively via the second on-off valve 3.2. Due to the open-close valves 3.1 and 3.2 prevails in the input section 7, the same pressure level as in the first connection section 6.1. Therefore virtually no gas flows from the inlet section 7 via the first throttle point 4.1 into the first connecting section 6.1. The total gas flow flowing through the gas valve unit therefore practically does not change as the permanent magnet 8 continues to move is moved to the right in the drawing and thereby the first on-off valve 3.1 is closed when the second open-close valve 3.2 is open.
Durch Bewegen des Permanentmagnets 8 nach in der Zeichnung rechts werden die Auf- Zu-Ventile 3.3. bis 3.5 sukzessive geöffnet und dadurch der Gasvolumenstrom durch die Gasventileinheit schrittweise erhöht. By moving the permanent magnet 8 according to the right in the drawing, the open-To valves 3.3. to 3.5 successively opened and thereby increases the gas flow rate through the gas valve unit gradually.
Figur 3 zeigt die schematische Schaltanordnung der Gasventileinheit in maximal geöffneter Stellung. Hierbei befindet sich der Permanentmagnet 8 in seiner Endstellung auf der in der Zeichnung rechten Seite. Das letzte Auf-Zu-Ventil 3.5 ist bei dieser Position des Permanentmagnets 8 geöffnet. Gas strömt hierbei direkt aus dem Gaseingangsraum 9 in den letzten Verbindungsabschnitt 6.4 und passiert auf dem Weg zum Gasausgang 2 ausschließlich die letzte Drosselstelle 4.5. Diese letzte Drosselstelle 4.5 kann einen derart großen Durchflussquerschnitt aufweisen, dass praktisch keine Drosselung des Gasstroms eintritt und das Gas die Gasventileinheit praktisch ungedrosselt durchströmen kann. Figure 3 shows the schematic circuit arrangement of the gas valve unit in the maximum open position. Here, the permanent magnet 8 is in its end position on the right side in the drawing. The last open-close valve 3.5 is opened at this position of the permanent magnet 8. Gas flows in this case directly from the gas inlet space 9 in the last connection section 6.4 and passes on the way to the gas outlet 2 exclusively the last orifice 4.5. This last restrictor 4.5 may have such a large flow cross-section that virtually no throttling of the gas flow occurs and the gas can flow through the gas valve unit virtually unthrottled.
Figur 4 zeigt schematisch einen konstruktiven Aufbau einer Gasventileinheit mit einer Schaltanordnung gemäß Figur 1 bis 3. Das erfindungsgemäße Absperrventil ist hier ebenfalls nicht dargestellt. Zu erkennen ist in Figur 4 ein Ventilkörper 20, in dem der Gaseingang 1 der Gasventileinheit ausgeführt ist. Im Inneren des Ventilkörpers 20 befindet sich ein mit dem Gaseingang 1 verbundener Gaseingangsraum 9. Absperrkörper 10 der Auf-Zu-Ventile 3 sind in dem Ventilkörper 20 geführt, derart, dass sie sich in der Zeichnung nach oben und unten bewegen können. Jeder Absperrkörper 10 ist mittels einer Feder 11 nach in der Zeichnung unten vorgespannt. Mittels der Kraft des Permanentmagnets 8 kann jeder Absperrkörper 10 entgegen der Kraft der Feder 1 1 nach in der Zeichnung oben bewegt werden. Die Federn 11 drücken die Absperrkörper auf eine Ventildichtplatte 12, so dass die Absperrkörper 10 in der Ventildichtplatte 12 vorhandene Öffnungen 12a gasdicht verschließen. Unterhalb der Ventildichtplatte 12 ist eine Druckplatte 13 angeordnet, mit Öffnungen 13a, die mit den Öffnungen 12a in der Ventildichtplatte 12 korrespondieren. Die Öffnungen 13a in der Druckplatte 13 münden in Öffnungen 14a in eine erste Gasverteilungsplatte 14. In der Zeichnung unterhalb der ersten Gasverteilungsplatte 14 befindet sich eine Drosselplatte 15 mit einer Vielzahl von Drosselöffnungen 18. Jede der Drosselstellen 4.1 bis 4.4 wird dabei von zwei Drosselöffnungen 18 gebildet. Die zwei zu einer Drosselstelle 4.1 bis 4.4 gehörenden Drosselöffnungen 18 sind jeweils mittels der Öffnungen 16a in einer zweiten Gasverteilungsplatte 16 miteinander verbunden. Die Öffnungen 14a in der ersten Gasverteilungsplatte verbinden hingegen die nebeneinander liegenden Drosselöffnungen 18 zweier benachbarter Drosselstellen 4.1 bis 4.5. Die letzte Drosselstelle 4.5 besteht aus nur einer Drosselöffnung 18, welche über eine korrespondierende Öffnung 16a in der zweiten Gasverteilungsplatte 16 in den Gasausgang 2 der Gasventileinheit mündet. Figure 4 shows schematically a structural design of a gas valve unit with a switching arrangement according to figure 1 to 3. The shut-off valve according to the invention is also not shown here. 4 shows a valve body 20, in which the gas inlet 1 of the gas valve unit is designed. Inside the valve body 20 is a gas inlet space 9 connected to the gas inlet 1. Shut-off bodies 10 of the open-close valves 3 are guided in the valve body 20, such that they can move up and down in the drawing. Each shut-off body 10 is biased by a spring 11 in the drawing below. By means of the force of the permanent magnet 8, each shut-off body 10 can be moved against the force of the spring 1 1 in the drawing above. The springs 11 press the shut-off body on a valve sealing plate 12, so that the shut-off body 10 in the valve sealing plate 12 openings 12a seal gas-tight. Below the valve sealing plate 12, a pressure plate 13 is arranged, with openings 13 a, which correspond to the openings 12 a in the valve sealing plate 12. The openings 13a in the pressure plate 13 open into openings 14a in a first gas distribution plate 14. In the drawing below the first gas distribution plate 14 is a throttle plate 15 having a plurality of throttle openings 18. Each of Throttling points 4.1 to 4.4 is formed by two throttle openings 18. The two throttle openings 18 belonging to a throttle point 4.1 to 4.4 are connected to one another in each case by means of the openings 16a in a second gas distribution plate 16. The openings 14a in the first gas distribution plate, however, connect the adjacent throttle openings 18 of two adjacent throttle points 4.1 to 4.5. The last orifice 4.5 consists of only one throttle opening 18, which opens via a corresponding opening 16a in the second gas distribution plate 16 in the gas outlet 2 of the gas valve unit.
Bei der Schaltstellung gemäß Figur 4 befindet sich der Permanentmagnet 8 in einer Endposition, in der alle Auf-Zu-Ventile 3 geschlossen sind. Die Gasventileinheit ist damit insgesamt geschlossen. Der Gasvolumenstrom ist gleich null. Ausgehend von dieser Schaltstellung wird der Permanentmagnet 8 nach in der Zeichnung rechts bewegt, wodurch jeweils die unter dem Permanentmagnet 8 angeordneten Auf-Zu-Ventile 3 geöffnet werden. In the switching position according to Figure 4, the permanent magnet 8 is in an end position in which all open-close valves 3 are closed. The gas valve unit is thus closed overall. The gas volume flow is equal to zero. Starting from this switching position, the permanent magnet 8 is moved to the right in the drawing, whereby each arranged under the permanent magnet 8 open-close valves 3 are opened.
Figur 5 zeigt den schematischen Aufbau der erfindungsgemäßen Gasventilanordnung. Zu erkennen ist das im Wesentlichen rotationssymmetrische Ventilgehäuse 20 mit einer zentral angeordneten Betätigungswelle 31. Die beispielsweise fünf Auf-Zu-Ventile 3 sind entlang eines Kreisbogens um die Betätigungswelle 31 angeordnet. An dem oberen Ende der Betätigungswelle 31 befindet sich deren Bedienabschnitt 29, auf den beispielsweise ein Drehknebel aufgesteckt werden kann. An dem unteren Ende der Betätigungswelle 31 ist eine Betätigungsvorrichtung 25 angeordnet, an deren äußerem Ende der Permanentmagnet 8 angeordnet ist. Bei einem Drehen der Bestätigungswelle 31 bewegt sich der Permanentmagnet 8 entlang eines Kreisbogens an den Auf-Zu-Ventilen 3 vorbei. Jeweils genau die Auf-Zu-Ventile 3, die sich direkt über dem Permanentmagnet 8 befinden, werden durch die Magnetkraft des Permanentmagnets 8 geöffnet. Oben auf die Betätigungswelle 31 kann beispielsweise ein von der Bedienperson direkt greifbarer Drehknebel aufgesteckt sein. An der Oberseite des Ventilkörpers ist eine Abdeckung 30 ausgebildet, in der, von unten nach oben, die Ventildichtplatte 12, die Druckplatte 13, die erste Gasverteilungsplatte 14, die Drosselplatte 15 und die zweite Gasverteilungsplatte 16 angeordnet sind. Die Platten 12 bis 16 sind durch Abnehmen der Abdeckung 30 zugänglich. Der Zugang zu den Platten 12 bis 16 erfolgt von oben, d. h. von derselben Seite, aus der die Betätigungswelle 31 aus dem Ventilgehäuse 20 ragt. FIG. 5 shows the schematic structure of the gas valve arrangement according to the invention. Evident is the substantially rotationally symmetrical valve housing 20 with a centrally disposed actuating shaft 31. The example, five open-close valves 3 are arranged along a circular arc around the actuating shaft 31. At the upper end of the actuating shaft 31 is the operating section 29, on the example, a rotary knob can be plugged. At the lower end of the actuating shaft 31, an actuating device 25 is arranged, at the outer end of the permanent magnet 8 is arranged. Upon rotation of the confirmation shaft 31, the permanent magnet 8 moves along a circular arc past the open-close valves 3. In each case exactly the open-close valves 3, which are located directly above the permanent magnet 8, are opened by the magnetic force of the permanent magnet 8. At the top of the actuation shaft 31, for example, a knob which can be grasped directly by the operator can be attached. At the top of the valve body, a cover 30 is formed, in which, from bottom to top, the valve sealing plate 12, the pressure plate 13, the first gas distribution plate 14, the throttle plate 15 and the second gas distribution plate 16 are arranged. The plates 12 to 16 are accessible by removing the cover 30. Access to the Plates 12 to 16 takes place from above, ie from the same side from which the actuating shaft 31 protrudes from the valve housing 20.
Zur Anpassung der Gasventileinheit an eine andere Gasart ist insbesondere die Drosselplatte 15 auszutauschen. In der Drosselplatte 15 befinden sich die Drosselöffnungen 18, welche die Größe des Gasvolumenstroms maßgeblich festlegen. Nach einem Abnehmen der Abdeckung nach oben befinden sich alle Platten 12 bis 16 in der Abdeckung 30. To adapt the gas valve unit to another type of gas, in particular, the throttle plate 15 is replaced. In the throttle plate 15 are the throttle openings 18, which set the size of the gas flow significantly. After removing the cover up, all plates 12 to 16 are in the cover 30.
Zu erkennen ist weiter die Anordnung zur Betätigung des in dieser Abbildung nicht dargestellten Absperrventils 40. Diese umfasst ein erstes Gleitelement 41 , das an der Betätigungswelle 31 befestigt ist. Das erste Gleitelement 41 steht in Kontakt mit einem zweiten Gleitelement 42, das über ein Verbindungselement 45 an einen Ventilkörper des Absperrventils gekoppelt ist. Beide Gleitelemente 41 , 42 sind von kegelförmigen Körpern gebildet. Ein dritter kegelförmiger Körper 43 dient als Teil einer Koppelvorrichtung 26, mit welcher eine Drehbewegung der Betätigungswelle 31 auf die Betätigungsvorrichtung 25 übertragen wird. Die Koppelvorrichtung 26 besteht im Wesentlichen aus einem Mitnehmer 27, der in eine schlitzförmige Ausnehmung 28 eingreift. The arrangement for actuating the shut-off valve 40, which is not shown in this figure, can also be seen. This comprises a first sliding element 41, which is fastened to the actuating shaft 31. The first sliding element 41 is in contact with a second sliding element 42, which is coupled via a connecting element 45 to a valve body of the shut-off valve. Both sliding elements 41, 42 are formed by conical bodies. A third conical body 43 serves as part of a coupling device 26, with which a rotational movement of the actuating shaft 31 is transmitted to the actuator 25. The coupling device 26 essentially consists of a driver 27, which engages in a slot-shaped recess 28.
In der in Figur 5 dargestellten Position befindet sich die Gasventileinheit in vollständig geschlossener Stellung. Die Rotationsposition der Betätigungswelle 31 ist derart gewählt, dass sich der Permanentmagnet 8 nicht unterhalb eines Auf-Zu-Ventils 3 befindet und damit alle Auf-Zu-Ventile 3 geschlossen sind. Darüber hinaus ist die Betätigungswelle 31 auch nicht in axialer Richtung eingedrückt. Das zweite Gleitelement 42 befindet sich in einer linken Anschlagposition. Aufgrund der Formgebung des ersten Gleitelements 41 als kegelförmiger Körper hat eine ausschließliche Drehbewegung der Betätigungswelle 31 und damit des ersten Gleitelements 41 keinen Einfluss auf die Position des zweiten Gleitelements 42. Aus demselben Grund ist das untere Ende der Betätigungswelle 31 ebenfalls von einem (dritten) kegelförmigen Körper 43 gebildet. In der Schaltposition gemäß Figur 5 befindet sich im Ventilgehäuse 20 der Gasventileinheit aufgrund des geschlossenen Absperrventils 40 kein Gas. Wenn nun die Schaltwelle 31 in axialer Richtung nach unten eingedrückt wird, öffnet sich das Absperrventil 40 und das Ventilgehäuse 20 füllt sich mit Gas. In the position shown in Figure 5, the gas valve unit is in the fully closed position. The rotational position of the actuating shaft 31 is selected such that the permanent magnet 8 is not below an open-close valve 3 and thus all open-close valves 3 are closed. In addition, the actuating shaft 31 is not pressed in the axial direction. The second slider 42 is in a left stop position. Due to the shape of the first sliding member 41 as a conical body has an exclusive rotational movement of the actuating shaft 31 and thus the first sliding member 41 has no influence on the position of the second sliding member 42. For the same reason, the lower end of the actuating shaft 31 is also of a (third) conical Body 43 formed. In the switching position according to FIG. 5, there is no gas in the valve housing 20 of the gas valve unit due to the closed shut-off valve 40. Now, when the switching shaft 31 is pressed down in the axial direction, the shut-off valve 40 opens and the valve housing 20 fills with gas.
Dieser Zustand der Gasventileinheit ist in Figur 6 dargestellt. Hierbei hat das erste Gleitelement 41 das zweite Gleitelement 42 mit dem Verbindungselement 45 nach in der Zeichnung rechts gedrückt. Das Verbindungselement 45 wirkt direkt auf das Absperrelement 44 des Absperrventils 40 (siehe Figur 10), so dass dieses geöffnet ist. Der in der Zeichnung untere Bereich der Gasventileinheit ist dadurch mit Gas gefüllt (siehe gepunktete Flächen). Hingegen sind die Auf-Zu-Ventile 3 weiterhin geschlossen, so dass der Durchflussquerschnitt der Gasventileinheit weiterhin gleich Null ist. This state of the gas valve unit is shown in FIG. Here, the first sliding member 41 has the second sliding member 42 is pressed with the connecting element 45 to the right in the drawing. The connecting element 45 acts directly on the shut-off element 44 of the shut-off valve 40 (see FIG. 10), so that it is open. The lower part of the gas valve unit in the drawing is thereby filled with gas (see dotted areas). On the other hand, the on-off valves 3 are still closed, so that the flow cross-section of the gas valve unit is still zero.
In Figur 6 darüber hinaus zu erkennen ist die Ausbildung der Koppelvorrichtung 26 mit dem flachen Mitnehmer 27, der in die schlitzförmige Ausnehmung 28 des dritten kegelförmigen Körpers 43 eingesteckt ist. Eine axiale Bewegung der Betätigungswelle 31 ist durch diese Kombination aus Mitnehmer 27 und Ausnehmung 28 ausgleichbar, so dass eine solche Bewegung nicht auf die Betätigungsvorrichtung 25 der Auf-Zu-Ventile 3 übertragen wird. In addition, the formation of the coupling device 26 with the flat driver 27, which is inserted into the slot-shaped recess 28 of the third conical body 43, can be seen in FIG. An axial movement of the actuating shaft 31 is compensated by this combination of driver 27 and recess 28, so that such a movement is not transmitted to the actuator 25 of the open-close valves 3.
Figur 7 zeigt eine weitere Betriebsposition der Gasventileinheit, in der das Absperrventil 40 durch Eindrücken der Betätigungswelle 31 geöffnet ist und darüber hinaus eines der Auf-Zu-Ventile 3 mittels des Permanentmagnets 8 geöffnet ist. Durch dieses geöffnete Auf-Zu-Ventil 3 strömt nun Gas auch in den Bereich oberhalb des Auf-Zu-Ventils in Richtung des Gasausgangs 2. Das Absperrventil 40 wird hierbei mechanisch über das erste Gleitelement 41 , das zweite Gleitelement 42 und das Verbindungselement 45 in Offenstellung gehalten. FIG. 7 shows a further operating position of the gas valve unit, in which the shut-off valve 40 is opened by pressing in the actuating shaft 31 and, moreover, one of the open-close valves 3 is opened by means of the permanent magnet 8. Gas now also flows into the region above the open-close valve in the direction of the gas outlet 2 through this open on-off valve 3. The shut-off valve 40 is mechanically moved via the first sliding element 41, the second sliding element 42 and the connecting element 45 in FIG Held open position.
Im Gegensatz hierzu zeigt Figur 8 eine Betriebsstellung der Gasventileinheit, bei der das Absperrelement 44 des Absperrventils 40 mittels der Kraft eines in der vorliegenden Abbildung nicht dargestellten Elektromagnets in Offenstellung gehalten ist. Die Betätigungswelle 32 befindet sich hier in nicht eingedrückter Position, so dass das erste Gleitelement 41 keine Kraft auf das zweite Gleitelement 42 ausübt. In dieser Stellung befindet sich die Gasventileinheit während des laufenden Betriebs, wenn an dem mit der Gasventileinheit verbundenen Gasbrenner eine Flamme brennt. Die Art der Betätigung des Absperrventils 40 wird nochmals anhand der Figuren 9, 10 und 11 näher beschrieben. Zu erkennen ist hier jeweils das erste Gleitelement 41 , das zweite Gleitelement 42, ein von einer Feder gebildetes Verbindungselement 45, das Absperrelement 44 sowie eine Magneteinheit 50. Die geschlossene Ruheposition des Absperrventils 40 ist durch die auf den Absperrkörper 10 wirkende Feder 51 sichergestellt. In contrast, Figure 8 shows an operating position of the gas valve unit, in which the shut-off element 44 of the check valve 40 is held in the open position by means of the force of an electromagnet, not shown in the present figure. The actuating shaft 32 is here in a non-depressed position, so that the first sliding element 41 exerts no force on the second sliding element 42. In this position, the gas valve unit is during operation when a flame is burning on the gas burner connected to the gas valve unit. The type of actuation of the shut-off valve 40 will be described in more detail with reference to Figures 9, 10 and 11. The first sliding element 41, the second sliding element 42, a connecting element 45 formed by a spring, the shut-off element 44 and a magnet unit 50 can be seen here. The closed rest position of the shut-off valve 40 is ensured by the spring 51 acting on the shut-off body 10.
In der Darstellung gemäß Figur 9 ist die Betätigungswelle 31 nicht eingedrückt. Das Absperrventil 40 ist durch die Kraft der Feder 51 geschlossen. Das Verbindungselement 45 weist zu dem Absperrkörper 10 einen Abstand auf. In the illustration according to FIG. 9, the actuating shaft 31 is not pressed in. The check valve 40 is closed by the force of the spring 51. The connecting element 45 has a distance to the shut-off body 10.
In der Schaltstellung gemäß Figur 10 ist die Betätigungswelle 31 eingedrückt, so dass das zweite Gleitelement 42 mit dem Verbindungselement 45 nach in der Zeichnung links verschoben ist und das Absperrelement 44 entgegen der Kraft der Feder 51 von seinem Ventilsitz abhebt. Das Absperrventil 40 kann hierdurch von Gas durchströmt werden. In the switching position according to FIG. 10, the actuating shaft 31 is pressed in, so that the second sliding element 42 with the connecting element 45 is shifted to the left in the drawing and the shut-off element 44 lifts from its valve seat counter to the force of the spring 51. The shut-off valve 40 can thereby be traversed by gas.
In der Darstellung gemäß Figur 11 ist die Betätigungswelle 31 ebenfalls eingedrückt, jedoch weiter als in der Position gemäß Figur 10. Folglich ist auch das zweite Gleitelement 42 weiter nach in der Zeichnung links verschoben, als in Figur 10. Damit diese weitere Bewegung des zweiten Gleitelements 42 nicht auf das Absperrelement 44 des Absperrventils 40 übertragen wird, ist das Verbindungselement 45 als Feder ausgeführt. Die das Verbindungselement 45 bildende Feder ist jedoch wesentlich steifer ausgeführt als die Feder 51 des Absperrventils 40. Die Ausbildung des Verbindungselements 45 als Feder dient insbesondere dazu, Beschädigungen des Absperrventils 40 zu vermeiden, wenn auf die Betätigungswelle 31 mit übermäßig großer Kraft gedrückt wird. In the illustration according to FIG. 11, the actuating shaft 31 is likewise pressed in, but further than in the position according to FIG. 10. Consequently, the second sliding element 42 is also displaced further to the left in FIG. 10 than in FIG. 10. Thus, this further movement of the second sliding element 42 is not transmitted to the shut-off element 44 of the check valve 40, the connecting element 45 is designed as a spring. However, the spring forming the connecting element 45 is substantially stiffer than the spring 51 of the shut-off valve 40. The design of the connecting element 45 as a spring serves, in particular, to prevent damage to the shut-off valve 40 when the actuating shaft 31 is pressed with an excessively large force.
Figur 12 zeigt eine erfindungsgemäße Gasventileinheit im Querschnitt. Dargestellt sind der Gaseingang 1 , welcher direkt in das Absperrventil 40 mündet. Von dem Absperrventil 40 sind insbesondere der Absperrkörper 10, die Feder 51 und die Magneteinheit 50 zu erkennen. FIG. 12 shows a gas valve unit according to the invention in cross section. Shown are the gas inlet 1, which opens directly into the shut-off valve 40. Of the shut-off valve 40 in particular the shut-off body 10, the spring 51 and the magnet unit 50 can be seen.
Das als Feder ausgebildete Verbindungselement 45 ist zur Übertragung einer Druckkraft von dem zweiten Gleitelement 42 auf den Absperrkörper 10 geeignet. Das zweite Gleitelement 42 gleitet dabei an dem ersten Gleitelement 41 ab, welches aus der Betätigungswelle 31 ausgebildet ist. The connecting element 45 designed as a spring is suitable for transmitting a pressure force from the second sliding element 42 to the shut-off body 10. The second Slide member 42 slides on the first sliding member 41, which is formed from the actuating shaft 31.
Unterhalb des ersten Gleitelements 41 befindet sich das dritte kegelförmige Element 43 mit der Koppelvorrichtung 26, die eine Drehbewegung der Betätigungswelle 31 auf den Permanentmagnet 8 überträgt. Der Permanentmagnet 8 öffnet mittels seiner Magnetkraft jeweils das direkt über ihm befindliche Auf-Zu-Ventil 3. Below the first sliding element 41 is the third conical element 43 with the coupling device 26, which transmits a rotational movement of the actuating shaft 31 to the permanent magnet 8. The permanent magnet 8 opens by means of its magnetic force in each case the directly above it located on-off valve. 3
BEZUGSZEICHENLISTE LIST OF REFERENCE NUMBERS
1 Gaseingang 1 gas inlet
2 Gasausgang 2 gas outlet
3 (3.1 bis 3.5) Auf-Zu-Ventile 3 (3.1 to 3.5) on-off valves
4 (4.1 bis 4.5) Drosselstellen 4 (4.1 to 4.5) Throttling points
5 Drosselstrecke 5 throttle section
6 (6.1 bis 6.4) Verbindungsabschnitt 6 (6.1 to 6.4) connecting section
7 Eingangsabschnitt 7 entry section
8 Permanentmagnet 8 permanent magnet
9 Gaseingangsraum 9 gas inlet space
10 Absperrkörper 10 shut-off body
1 1 Feder 1 1 spring
12 Ventildichtplatte 12 valve sealing plate
12a Öffnungen 12a openings
13 Druckplatte 13 pressure plate
13a Öffnungen 13a openings
14 erste Gasverteilungsplatte 14 first gas distribution plate
14a Öffnungen 14a openings
15 Drosselplatte 15 throttle plate
16 zweite Gasverteilungsplatte 16 second gas distribution plate
16a Öffnungen 16a openings
17 Abschlussplatte 17 end plate
18 Drosselöffnungen 18 throttle openings
20 Ventilgehäuse 20 valve housing
25 Betätigungsvorrichtung 25 actuator
26 Koppelvorrichtung 26 coupling device
27 Mitnehmer 27 drivers
28 Ausnehmung 28 recess
29 Bedienabschnitt 29 Operating section
30 Abdeckung 30 cover
31 Betätigungswelle 31 actuating shaft
32 Abdeckplatte 33 Muldengehäuse 32 cover plate 33 bowl housing
34 Arbeitsplatte 34 worktop
40 Absperrventil 40 shut-off valve
41 erstes Gleitelement 41 first sliding element
42 zweites Gleitelement42 second sliding element
43 dritter kegelförmiger Körper43 third conical body
44 Absperrelement 44 shut-off element
45 Verbindungselement 45 connecting element
50 Magneteinheit 50 magnet unit
51 Feder 51 spring
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11794707.7A EP2652402B1 (en) | 2010-12-14 | 2011-12-07 | Gas valve unit comprising a lift deflection system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10290660 | 2010-12-14 | ||
| EP11794707.7A EP2652402B1 (en) | 2010-12-14 | 2011-12-07 | Gas valve unit comprising a lift deflection system |
| PCT/EP2011/072056 WO2012080054A2 (en) | 2010-12-14 | 2011-12-07 | Gas valve unit comprising a lift deflection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2652402A2 true EP2652402A2 (en) | 2013-10-23 |
| EP2652402B1 EP2652402B1 (en) | 2020-11-11 |
Family
ID=45346457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11794707.7A Active EP2652402B1 (en) | 2010-12-14 | 2011-12-07 | Gas valve unit comprising a lift deflection system |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US9206982B2 (en) |
| EP (1) | EP2652402B1 (en) |
| KR (1) | KR101924242B1 (en) |
| CN (1) | CN103547865B (en) |
| AU (1) | AU2011344470B8 (en) |
| ES (1) | ES2834317T3 (en) |
| RU (1) | RU2546345C2 (en) |
| WO (1) | WO2012080054A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2747990T3 (en) * | 2014-05-22 | 2020-03-12 | Bsh Hausgeraete Gmbh | Gas valve, cooking point and gas cooking appliance |
| ES2828649T3 (en) * | 2018-03-26 | 2021-05-27 | Copreci S Coop | Gas tap with safety valve for a gas cooking appliance, and a gas cooking appliance incorporating said gas tap |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1403016A (en) * | 1964-04-29 | 1965-06-18 | Thermiguides | Pneumatic valve with non-electric magnetic control, more particularly for textile machines |
| GB2196732B (en) | 1986-10-29 | 1990-09-19 | Ti New World Ltd | Gaseous fuel flow control arrangements |
| GB2230595B (en) * | 1989-04-08 | 1993-05-12 | Pompe Dev Ltd | Gas hob |
| FR2659130B1 (en) * | 1990-03-05 | 1992-06-19 | Sourdillon Sa | GAS SUPPLY DEVICE FOR A GAS BURNER, PARTICULARLY FOR A FLAT-TYPE HOUSEHOLD APPLIANCE, EQUIPPED WITH AN ANGULAR DRIVE DEVICE. |
| IT220286Z2 (en) * | 1990-11-19 | 1993-09-15 | Imit | TAP-GAS WITH MODULAR SAFETY SPECIES FOR COOKING HOBS OF LIMITED HEIGHT. |
| DE4041624A1 (en) * | 1990-12-22 | 1992-07-02 | Elektro Gas Armaturen | FASTENER |
| IT1293697B1 (en) * | 1997-04-30 | 1999-03-10 | Op Srl Ora Op Controls S R L | SAFETY AND REGULATION VALVE UNIT FOR A GAS SYSTEM, PARTICULARLY A HEATING SYSTEM |
| IT247344Y1 (en) * | 1999-06-02 | 2002-07-09 | Siral S P A | VALVE FOR GAS VALVE. |
| DE10249938A1 (en) * | 2002-10-24 | 2004-05-13 | Abb Research Ltd. | Micro system valve has a ferromagnetic valve element moved by permanent magnets on a slider mounting |
| US20060057520A1 (en) * | 2004-09-16 | 2006-03-16 | Saia Richard J | Control valve assembly for controlling gas flow in gas combustion systems |
| DE602004031859D1 (en) * | 2004-12-16 | 2011-04-28 | Coprecitec Sl | Gas tap for a gas burner |
| DE102008027546A1 (en) * | 2008-06-10 | 2009-12-17 | Heatec Thermotechnik Gmbh | Valve device for combustible gases, has valve for releasing or locking of gas flow, where bistable actuator is provided, which is connected to control device |
| CN201277586Y (en) * | 2008-10-10 | 2009-07-22 | 山东大学 | Gas cut-off and flux valve for automobile heater |
-
2011
- 2011-12-07 WO PCT/EP2011/072056 patent/WO2012080054A2/en not_active Ceased
- 2011-12-07 AU AU2011344470A patent/AU2011344470B8/en not_active Ceased
- 2011-12-07 ES ES11794707T patent/ES2834317T3/en active Active
- 2011-12-07 RU RU2013129298/06A patent/RU2546345C2/en active
- 2011-12-07 KR KR1020137018300A patent/KR101924242B1/en not_active Expired - Fee Related
- 2011-12-07 EP EP11794707.7A patent/EP2652402B1/en active Active
- 2011-12-07 CN CN201180060438.3A patent/CN103547865B/en active Active
- 2011-12-07 US US13/989,824 patent/US9206982B2/en active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012080054A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012080054A3 (en) | 2013-10-17 |
| CN103547865B (en) | 2016-01-20 |
| WO2012080054A2 (en) | 2012-06-21 |
| KR101924242B1 (en) | 2018-11-30 |
| KR20130132539A (en) | 2013-12-04 |
| RU2546345C2 (en) | 2015-04-10 |
| RU2013129298A (en) | 2015-01-20 |
| AU2011344470B8 (en) | 2015-07-23 |
| US9206982B2 (en) | 2015-12-08 |
| ES2834317T3 (en) | 2021-06-17 |
| EP2652402B1 (en) | 2020-11-11 |
| AU2011344470A1 (en) | 2013-07-11 |
| HK1194130A1 (en) | 2014-10-10 |
| US20130248745A1 (en) | 2013-09-26 |
| AU2011344470B2 (en) | 2015-05-14 |
| CN103547865A (en) | 2014-01-29 |
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