JPS5833952B2 - 2 Jiyuden Jiben - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention is a dual solenoid valve with two different flow cross-sections for gas burners for part-load and full-load operation, which controls large flow cross-sections. a main electromagnet with a main movable body, an auxiliary electromagnet with an auxiliary movable body for controlling a small flow cross section and an adjustable stop for limiting the stroke of the movable valve member to a small flow cross section in the working position. Regarding formal matters.

A double solenoid valve of this type is known from DE 21 03 427 A1.

In this known dual solenoid valve, one movable body moves the valve plate apart until it opens into a small flow cross section.

When this cross-section is reached, the bushing rod is brought into contact with a breakable stop.

In addition, when attempting to open a valve with a large flow cross section,
Another electromagnet disconnects the stop.

Valves with a two-part movable member are also known, in which case the image parts can be actuated one after the other.

However, such valves have a relatively complex construction.

This is because the actuating mechanism must be guided away from each other towards the two sides, or else must be guided in and out of each other.

A disadvantage of valves with breakable stops is that these stops are subject to frequent wear.

An object of the present invention is to make the movable valve member a simple integral structure, eliminate the frequently worn stopper that can be cut and connected for switching from the small flow cross section to the dog flow cross section, and the complicated operating mechanism. Not only can the valve be opened sequentially from the flow cross section to the large flow cross section, but also the valve can be opened all at once from the opening position to the dog flow cross section. It is an object of the present invention to provide a double solenoid valve that is configured to function reliably so as not to exert any influence on the position of an auxiliary movable body.

The gist of the present invention for solving the above-mentioned problems in the dual solenoid valve of the type described at the beginning is that the main movable body and the auxiliary movable body are both coupled to a movable valve member, and the auxiliary movable body is The point is that the interlocking joint (thereby being connected to the movable valve member) only in one direction.

Despite the fact that both pivot bodies are connected to the movable valve member, this surprisingly simple design makes it possible to form the movable valve member in one piece rather than in two parts.

In this case, the auxiliary movable body opens the movable valve member up to the small flow cross section, and the main movable body opens the movable valve member up to the dog flow cross section.

A further advantage is that a very simple and space-saving construction is obtained, yet the adjustment is easy and the adjustment mechanism can be easily accessed.

It is also possible to obtain a wide variety of valve-opening and valve-closing characteristic curves in an advantageous manner by means of simple additional measures described below.

This is possible because the auxiliary movable body is connected to the movable valve member in only one direction by means of a small interlock joint.

The interlocking joint can be configured arbitrarily.

In an advantageous embodiment of the invention, the interlocking joint is constructed in such a way that the actuation of the main movable body does not have any influence on the position of the auxiliary movable body.

In other words, for example, it is possible to immediately open the solenoid valve to the dog flow cross section if desired.

The mechanical coupling between the movable body of the electromagnet and the movable valve member can be configured as desired.

In known and publicly used valves, the movable valve member is loaded by a small return spring in the valve closing direction.

In the case of this type of valve, in an advantageous embodiment of the invention, the main movable body is tensilely connected to the movable valve member.

For example, a tensile bond can be obtained by hingedly fixed ronds, or alternatively by tension members that are rigid only in the longitudinal direction and flexible in the other direction.

The closing force on the valve member is produced by a return spring, which at the same time also returns the movable body to its starting position.

The arrangement of the two magnet systems with respect to each other and the arrangement of the two electromagnet systems relative to the valve can be freely selected within a wide range.

In the known double electromagnetic valve, which has an excellent structure in that it does not take up much space, both electromagnet systems are arranged coaxially one above the other.

In embodiments of the invention in which such an electromagnetic arrangement is also chosen, the auxiliary movable body is tensilely connected to the main movable body in its operating direction.

This tensile bond can also be obtained, for example, by hinged ronds or by other tensile members.

The use of a single rond and the hinged fixation of at least one end has the advantage that relatively small alignment errors between the movable body and the movable valve member do not have a detrimental effect. .

This allows alignment errors within a predetermined range during production, which has a significant advantageous effect on production costs by avoiding production of defective products.

In an advantageous embodiment of the invention, the main movable body has a pull rod (mandrel) pivotally mounted thereon, which pull rod passes through a hole in the auxiliary movable body with play, and the free end of said pull rod is provided with an enlarged cross-section portion, and the end surface of the enlarged cross-section portion is
It comes into contact with the stop edge on the side of the auxiliary movable body that is farther away from the main movable body.

In this way, a joint between the auxiliary movable body and the movable valve member can be obtained in a simple manner, and the joint can be used as an interlocking body in only one direction.

For example, a transverse pin inserted through a tension rod can also be used as the front cross-sectional enlargement.

However, in a preferred embodiment of the invention, a threaded sleeve is provided as the cross-sectional enlargement, which threaded sleeve is screwed onto the free end of the pull rod.

This makes it possible to fine-tune the effective length of the drawbar in steps.

Advantageously, this adjustment is carried out such that there is a small distance in the pulling direction between the cross-sectional enlargement and the stop edge of the auxiliary movable body.

By doing this, the auxiliary electromagnet does not attract the auxiliary movable body under load, and the auxiliary movable body initially engages the enlarged cross section and moves the movable valve until the small flow cross section is reached. A short distance can be traveled unloaded until the member is stroked.

In the embodiments described so far, the double solenoid valve opens and closes relatively quickly within the stroke time of the movable body or within the valve closing time defined by the return spring.

In many cases, however, it is desired to slowly open or close the valves up to the small flow cross section and slowly open or close the valves up to the dog flow cross section.

In an advantageous embodiment of the invention, therefore, a variable-length delay element is arranged between the part fixed to the housing, in particular the movable stop, and the auxiliary movable body.

In one embodiment, a delay element of variable length is arranged between the tension rod and a part fixed to the housing, in particular a movable stop.

In this case, it is also possible to use a hydraulic brake in the form of a shock absorber or a pneumatic delay element as a delay element.

Such delay elements are known in various construction types.

In any case, the delay element makes it possible to slowly advance the distance over which it is inserted.

Therefore, in many applications it is desired to open the valve until a small flow cross section is reached, or from a small flow cross section to a dog flow cross section, or alternatively to open a large or small flow cross section. It is also possible to open the valve in the cross section at a slow regulating speed.

In this way, the scope of application of the double solenoid valve according to the invention is considerably extended, without the need for structural improvements or any special outlays.

It is also possible in each case to carry out the first part of the valve stroke without delay and the second part of the valve stroke with delay, provided that the free stroke is greater than the maximum flame of the delay member. , so first the valve stroke is free and only then does the delay element begin its action.

The structure and arrangement of the stopper can be freely selected within a wide range.

In an advantageous embodiment of the invention, an adjustable stop is provided which cooperates with the auxiliary movable body as a stop for limiting the stroke of the movable valve member to a small flow cross section.

Advantageously, this stop is designed as a stop sleeve coaxial with respect to the auxiliary movable body, which stop sleeve is guided so as to be longitudinally movable along a thread.

Instead of a threaded sleeve, it is also possible to use a threaded bolt which forms a stop surface for the auxiliary movable body as well as a stop surface for the pull rod (or axle).

The two stop surfaces are offset in height from one another.

For example, the stop surface against which the tension rod rests with its end face may be configured as a thread turned into the end face of the threaded bolt.

In an advantageous embodiment of the invention, the delay element is movably guided in its longitudinal direction and is provided with an adjustable stop for the longitudinal movement of the delay element.

As already mentioned, the maximum flame of the delay element is then advantageously smaller than the minimum adjustable distance between the surfaces of the two ends of the delay element that abut when the movable body is not actuated.

Advantageously, the delay element is integrated inside the threaded sleeve, which serves as a stop for the auxiliary movable body.

In this case, a stopper for the delay element is screwably fastened to the threaded sleeve.

The advantage of this embodiment is that all important factors determining the performance values of the double solenoid valve can be adjusted individually and in a simple manner.

The invention will now be described in detail with reference to the drawings.

The valve body 1 of the dual solenoid valve according to the present invention has an inlet 2 and an outlet 3, the inlet 2 is connected to an inlet conduit, and the outlet 3 is connected to an outlet conduit.

When the valve is closed, the inlet 2 and the outlet 3 are isolated from each other by the valve 5 seated on the valve ring 4.

The valve ring 4 is sealed within the valve body 1.

On the side facing the valve plate 5, the valve ring 4 has an annular knife 6 which, when the valve is closed, touches the valve plate 5.
The rubber ring 7e installed in the annular groove of the rubber ring 7e comes into contact under the action of the pressing coil spring 8.

The valve plate 5 has a concentrically arranged hollow cylindrical collar 9 on the side remote from the valve link 4, and a stud 10 is fitted into the collar, and the collar 9 and the stud 10 and is secured by a safety pin 11 passing through it in the lateral direction t7).

The stud 10 is configured as an axial extension of the main movable body 12 of the pot-shaped main electromagnet 13.

The pot-shaped main electromagnet 13 has an outer cylindrical sleeve 14 made of a ferromagnetic material.

The sleeve 14 includes, outside the pot-shaped main electromagnet 13,
Auxiliary electromagnet 15 also configured as a pot-shaped electromagnet
is surrounding.

The sleeve 14 is closed at each end with a ring 16 at each end.

Both rings 16 hold a core 17, both of which are made of ferromagnetic material.

The core 17 is designed as a hollow cylindrical section in its end regions and has an axially extending central bore in its central region.

Core 17 is longer than sleeve 14 and projects beyond ring 16 at both ends.

On the end face side facing the valve body 1, the core 17 is connected to the collar 18.
The outer end surface of the ring 16 is in contact with the outer end surface l of the ring 16.

On the other side of the collar 18, the core 17 is in contact with the outer surface of a cover 19, and the cover 19 is screwed onto the valve body 1 by screws 20.

The cover 19 is sealed by an O-ring 21.

The collar 18 of the core 17 continues outwardly with a threaded step.

Since the cover 19 has a screw hole corresponding to the screw step, the core 17 is screwed into the cover 19.

A non-ferrous metal sleeve 22 is fitted in the hollow cylinder section of the core 17 facing the valve body 1, and the inner diameter of the non-ferrous metal sleeve is slightly larger than the inner diameter of the main movable body 12. , the main movable body 12 is slidable within the non-ferrous metal sleeve 22 in the longitudinal direction.

The main movable body 12 has one central hole on its end face facing the auxiliary electromagnet 15, into which a tension rod in the form of an axle 25 is inserted and a transverse The pin 24 ensures that it cannot be pulled out.

The pressure helical spring 8 is mounted on the valve plate 5 and on a ring 26 which is arranged in the bore of the core 17 in the area of the collar 18 .

A coil body 27 having a winding 28G is connected to the ring 16 facing the cover 19c.

Similarly, a coil body 29 having a winding 30 is connected to the other ring 16 .

On the end side of the coil body 27.29 remote from the two rings 16, two rings 31 are provided next to each other, which rings are made of ferromagnetic material and are connected to the outer cylindrical sleeve 14 and the core 17. It forms a magnetic short circuit between the two.

Both rings 31 with an annular hollow space 32 interposed therebetween are perforated in the axial direction.

Through these perforations the ends of the windings 28 and 30 are introduced into the annular cavity 32.

The outer cylindrical sleeve 14 has a radial bore 33 at one location on its circumference, which radial bore opens into the annular cavity 32 .

The radial hole 33 is shielded from the outside by a connecting terminal box 34.

The ends of the windings 28 and 30 pass through radial holes 33 and are led to terminal sockets (not shown) in the connection terminal box 34.

The core 17 is magnetically blocked in the end position range of the main movable body 12 when the valve is closed.

This magnetic isolation is produced by the fitting of the ring 35 made of non-magnetic material.

The ring 35 has a trapezoidal cross-sectional shape, and the long side of the two mutually parallel sides of the trapezoid is located on the outer circumferential surface of the hollow cylinder section of the core 17, and the short side is located on the inner circumferential surface of the hollow cylinder section. are doing.

Of the two oblique sides of the trapezoid, the shorter oblique side is on the side of the cover 19, and the longer oblique side, which forms an acute angle with respect to the two parallel sides, is the hollow cylinder that guides the main movable body 12. Located in the upper end region of the section, the core part made of ferromagnetic material forms a knife-shaped end, which knife is constructed in such a way that it lies approximately in the upper end surface region of the main movable body 12 when the valve is closed. ing.

By configuring the core 17 in this way, the core 17
Magnetic flux is induced in such a way as to cause magnetic saturation in the knife-shaped portion of the electromagnet 13, and thus to produce a relatively flat tensile force characteristic curve of the pot-shaped main electromagnet 13 as desired.

On the side remote from the valve body 1, the core 17 extends like a sleeve and is fitted with a ring 35' corresponding to the ring 35.

Connected to the U'J ring 35' is a sleeve-like section 35'' having an external thread and an internal thread at its free end extending outwardly through the ring 16. are doing.

A closing cap 52 is screwed onto the outer thread.

A non-ferrous metal sleeve 22' corresponding to the previously described non-ferrous metal sleeve 22 is inserted into the sleeve-shaped area of the core 17 that reaches the ring 35', and the non-ferrous metal sleeve is made of a non-magnetic material on the base side. It is connected to the cutoff ring 37 of.

An auxiliary movable body 36 having a vertical hole in the center is mounted on the blocking ring 37.

A mandrel 25 extends through the longitudinal hole.

The diameter of the vertical hole passing through the auxiliary movable body 36 is enlarged on the side remote from the main movable body 12.

Within this enlarged diameter range, the mandrel 25 with an external thread
A threaded sleeve 39 is screwed onto the free end of the shaft, and the outer diameter of the threaded sleeve is equal to the outer diameter of the mandrel 25 and the auxiliary 5J.
The outer diameter of the small-diameter vertical hole passing through the moving body 36 is smaller than the outer diameter.

The lower end surface of the threaded sleeve 39, which is closer to the main movable body 12, is slightly spaced from the base of the large-diameter vertical hole in the auxiliary movable body 36.

This base serves as a stop edge 40 and serves as an auxiliary movable body 3
6 moves away from the illustrated position in the direction away from the valve body 1, the lower end surface of the threaded sleeve 39 is connected to the stop edge 40.
comes into contact with.

Sleeve type classification 3! A sleeve 41 is screwed into the internal thread provided at the free end of l//, in which an adjusting screw 42 is guided so as to be movable in the longitudinal direction, the adjusting screw having a screw head 43. have.

Said adjusting screw 42 has a cylindrical extension 44 which has at its lower end a cylindrical section 45 with an outer diameter equal to the inner diameter of the sleeve-like section 35''.

The cylindrical extension 44 has a turned circumferential groove;
The OIJ song 6 is fitted into this groove and seals against the central vertical hole of the sleeve 41.

There is another zero between the sleeve 41 and the sleeve-like section 35'.
1J ring 47 is sandwiched.

As a result, the interior of the sleeve-shaped section 35'' is sealed off from the outside.

A throttle 53 is provided in order to adapt the relatively large amount of throughflow when the valve is fully open to the downstream consumption equipment, the throttle having the shape of a semi-cylindrical body, the semi-cylindrical body being connected to the magnet and the movable body. It is rotatable about a vertical axis that coincides with the vertical axis of.

The longitudinal axis of this semi-cylindrical body also coincides with the longitudinal axis of the valve ring 4.

If the semi-cylindrical body rests on the wall facing away from the outlet 3 and holding the valve ring 4, the entire flow cross section following the valve 4.5 is open.

When the anti-cylindrical body is rotated about its longitudinal axis, the cross-section leading to the outlet 3 is partially obscured.

As a result, the maximum flow rate when the valve is fully open, i.e. when both types of magnets are energized, is adjusted and adapted, for example, to the downstream consumer equipment.

The semi-cylindrical body as the throttle 53 has a short shaft 54 which is rotatably and sealingly supported in the valve body 1, and a pinion 55 is keyed at the end of the short shaft. A worm 56 is engaged with the pinion.

The worm 56 can be rotated, for example, manually or by a motor.

The pinion 55 and the worm 56 are sealed from the outside by a cover 57, which is fixed to the valve body 1 by screws 58.

When the valve is closed, both the main electromagnet 13 and the auxiliary electromagnet 15 are energized, meaning that the windings 28, 30 are in a non-energized state.

By the way, when the valve is to be opened with a small flow rate, the winding 30 of the auxiliary electromagnet 15 is first supplied with electricity, and then the auxiliary movable body 36 is moved in a direction away from the valve body 1.

The first stroke part of this movement in the direction of separation takes place completely unloaded until the stop edge 40 abuts the lower end face of the threaded sleeve 39 of the mandrel 25.

From the moment of said contact, the main movable body 12 is interlocked by the auxiliary movable body 36 and thus also via the stud 10.
The valve plate 5 as a movable valve member is also interlocked.

In this case, the valve plate can move away from the valve ring 4, that is, the knife blade 6, because the upper end surface of the auxiliary movable body 36 comes into contact with the lower end surface of the cylindrical section 45, or the partition plate 49 fixed to the lower end surface with screws 48. That's all there is to it.

By adjusting this contact distance, that is, by rotating the adjusting screw 42, it is possible to adjust the partial load amount to a desired value.

When trying to switch to full load flow rate, main electromagnet 1
3 windings 28 are also energized, whereby the main movable body 12 is attracted until it abuts the base of the hollow cylinder section in the core 17.

In this position of the main movable body 12 the valve plate 5 is further spaced from the valve ring 4 and full flow throughput is obtained.

In that case, the flow cross section between the valve ring 4 and the valve plate 5 no longer performs a throttling action, whereas this flow cross section is currently activated while only the auxiliary electromagnet 15 is energized. The aperture part is small.

The strength of the throttling action is selected by adjusting the adjustment screw 42,
The distance of the valve plate relative to the valve ring 4 can be adjusted by means of the adjusting screw.

In short, the valve of the present invention is a valve having a throttle that can be switched between opening and closing.

As already mentioned, the maximum flow rate is adjusted in any case by adjusting the half-cylinder as restrictor 53 or by actuating the worm 56.

A groove is formed in the stud 10, and an elastic rubber-like plastic buffer ring 50 is fitted into the groove, and the buffer ring is adapted to abut against the ring 26 just before the end of the valve stroke. It has become.

The buffer ring 50 seals the upper chamber against the gas guide valve body 1 and prevents dust particles from entering from one chamber to the other.

The valve of the embodiment shown in FIG. 2 is constructed substantially the same as the embodiment shown in FIG.

However, the adjusting screw 42 is drilled in the longitudinal direction and is designed as an adjusting sleeve 42'.

Inside and outside the longitudinal hole passing through the cylindrical section 45', a delay member 59 is housed, the delay member having the shape of a variable length cartridge, one end of which is connected to the upper end surface of the mandrel 25. is in contact with

The other end surface of the delay member 59 faces the lower end surface of the adjustment stopper 60 with a gap therebetween.

The adjustment stop 60 is designed as a pin guided in a longitudinal bore of the adjustment sleeve 42', and a cap nut 61 is fastened to the free end of the pin, which is connected to the adjustment sleeve 42'. ' is screwed into an external thread provided at the free end of the '.

A spanner fitting surface 62 is formed adjacent to this outer thread, and by gluing a spanner to this spanner fitting surface, the adjustment sleeve 42' can be rotated along the inner thread of the sleeve 41. .

This rotation adjusts the contact distance of the auxiliary movable body 36.

Also, by rotating the cap nut 61, the adjustment stopper 6
The contact of the delay member 59 at 0 is adjusted.

By connecting the auxiliary electromagnet 15, the winding 30 is energized and the auxiliary movable body 36 is attracted.

In that case, the auxiliary movable body also first travels a short unloaded distance and then rests with the stop edge 40 on the lower end face of the threaded sleeve 39 and then interlocks the main movable body 12 and the valve plate 5 as the movable valve member.

Partition plate 49' configured as a ring and auxiliary movable body 3
6 is smaller than the distance between the delay element 59 and the adjusting stop 60 in the inactive position of the valve arrangement, the initial The opening stroke takes place without delay.

If, on the other hand, the distance between the delay element 59 and the adjustment stop 60 is small, the second part of the valve opening stroke until the small flow cross section is reached takes place with a certain delay.

However, in both cases, the opening of the valve to the main flow cross section, that is, the large flow cross section, takes place with a delay.

This is because the delay element 59 is activated at the latest when the main movable body 12 is engaged.

FIGS. 3a to 3d show four different time course curves of the valve stroke.

In FIG. 3a, a partial load is first started without or with a very small delay, and then a full load is switched off with a delay.

At time t1, auxiliary electromagnet 15 is energized.

After a very short time, a relatively small flow cross section is opened and a partial load can flow through.

At time t2 the main electromagnet is energized, at which point the delay element begins to act, so that from time t2 to t3 there is an increase from partial load to full load, i.e. from a small flow cross section to a dog flow cross section. The valve is opened.

At an arbitrary time point t4 later, the currents of both magnets are cut off, and the time point t
During a short period of time from 4 to t5, the valve returns to its starting position.

In the time curve shown in FIG. 3b, a delay element is inserted in such a way that a delay effect is obtained as soon as the auxiliary electromagnet is connected.

In other words, this means that in the structural example shown in FIG. 2, the gap between the delay member 59 and the adjustment stopper 60 is extremely small or zero in the state shown in FIG. .

The operating sequence of FIG. 3c is similar to the operating sequence shown in FIG. 3a, with the only difference that in this case a switching operation from full load back to partial load is interposed.

In that case, each time there is a changeover from partial load to full load, the delay element 5
9 is clearly at work.

The operating sequence of FIG. 3d is approximately equivalent to the operating sequence shown in FIG. 3b, but here again a switching operation from full load to partial load is interposed.

In this case, the valve opens without delay between time t1 and time 11/, but time t! The opening of the valve is delayed until the partial load amount is reached.

This mode of action is obtained as follows.

That is, when the electromagnet is demagnetized, there is a relatively small distance between the delay member 59 and the adjustment stop 60, so that the auxiliary movable body is first attracted without delay, and the delay member 59 is adjusted. It comes into contact with the stopper 60.

However, this contact occurs when the auxiliary movable body 36 is attached to the partition plate 49'.
This is done well before the upper end surfaces of the

The invention is not limited to the illustrated embodiment, but can be implemented in various different ways without departing from the scope of the invention.

A particular advantage of the invention is that it provides a double solenoid valve of simple construction and reliable operation, which can be easily adapted to a wide variety of part-load and full-load flow rates, and which opens and closes the valve. The point is that the time course can vary within a wide range of limits.

Four different curves of the time course of the valve stroke are shown in the third
As shown in Figures a to 3d, it is of course possible to temporally delay the descent at the time of disconnection as well as the rise at the time of connection, and also the rise delay and descent. It is also possible to use it in selective combination with a delay.

The fall time (14-t5 or t6-t7) is then also increased, which may be advantageous in certain applications.

For implementation in this case, it is sufficient to create a tension connection between the delay element 59 and the adjusting stop 60 or between the delay element 59 and the mandrel 25.

In that case, the delay element 59 is constructed in the form of a double-acting shock absorber, and the delay times are different in different directions (either by shortening the delay element or by adjusting it).
It can also be made different.

It is therefore also possible to choose the steepness of the ascending curve to be different from the steepness of the descending curve shown in FIG.

[Brief explanation of drawings]

1 is a longitudinal sectional view of a double solenoid valve according to the invention, FIG. 2 is a longitudinal sectional view of a second embodiment of a double solenoid valve with an additional delay element, FIGS. 3a, 3b, 3c and 3d are diagrams showing four different switching programs that can be implemented by the double solenoid valve shown in FIG. 1...Valve body, 2...Inflow port, 3...
... Outlet, 4... Valve ring, 5...
...Ben plate, 6...Naifetsuji, 7...
・Rubber ring, 8...Press coil spring, 9...
...Hollow cylindrical collar 10 ...Stud, 11 ... Safety pin, 12 ... Kamimachi dynamic body, 13 ... Pot type main electromagnet, 14...
...Outer cylindrical sleeve, 15...Auxiliary electromagnet, 16...Ring, 17...Core, 1
8...Color, 19...Cover 20
...Screw, 21...01Jng, 22
, 22'...Non-ferrous metal sleeve, 24...
...Horizontal pin, 25...Mandrel as a tension rod, 2
6...Ring, 27...Coil body, 2
8... Winding wire, 29... Coil body, 30
...Winding, 31...Ring, 32...
...Annular hollow chamber, 33...Radial hole, 3
4... Connection terminal box, 35.35'...
...Ring made of non-magnetic material, 3! /'... Sleeve-shaped section, 36... Auxiliary movable body, 37...
...Shutoff ring, 39...Threaded sleeve,
40...Stop edge, 41...Sleeve, 42...Adjustment screw, 42'...Adjustment sleeve, 43...Screw head, 44...
...Cylindrical extension, 45.45'...Cylindrical section, 46.47...O-ring, 48...
・Screw, 49°49′...Partition plate, 50...
... Buffer ring, 52 ... Closure cap, 53 ... Semi-cylindrical aperture, 54 ...
...Short shaft, 55...Pinion, 56...
...Warm, 57...Cover, 58...
...Screw, 59...Delay member, 60...
・Adjustment stopper, 61...Cap nut, 6
2...Spanner fitting surface.

Claims (1)

[Claims] 1. A double solenoid valve with two different flow cross sections for the svarna for part-load and full-load operation, a main electromagnet with a main movable body controlling the large flow cross section; an auxiliary electromagnet having an auxiliary movable body for controlling a small flow cross section and arranged coaxially with said main electromagnet; In the case of the type with a stopper, a common core 17 is provided for the main electromagnet 13 and the auxiliary electromagnet 15, and this core is configured as a hollow cylinder section in both upper and lower end regions and has an axial direction in the central region. The auxiliary movable body 36 is slidably disposed in the upper cylinder section, and the main movable body 12 is slidably disposed in the lower cylinder section. The lower end is tensilely connected to the movable valve member 5, and the auxiliary movable body 36 is coupled to the main movable body 12 by an interlocking joint that passes through the center hole of the core 17 and operates only in one direction. A double solenoid valve characterized by: