EP0884531B1 - Assemblage de soupape - Google Patents

Assemblage de soupape Download PDF

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Publication number
EP0884531B1
EP0884531B1 EP98304666A EP98304666A EP0884531B1 EP 0884531 B1 EP0884531 B1 EP 0884531B1 EP 98304666 A EP98304666 A EP 98304666A EP 98304666 A EP98304666 A EP 98304666A EP 0884531 B1 EP0884531 B1 EP 0884531B1
Authority
EP
European Patent Office
Prior art keywords
valve
spindle
valve assembly
assembly according
flow
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.)
Expired - Lifetime
Application number
EP98304666A
Other languages
German (de)
English (en)
Other versions
EP0884531A3 (fr
EP0884531A2 (fr
Inventor
Amrik Singh Garcha
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Concentric Controls Ltd
Original Assignee
Concentric Controls Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GBGB9712388.9A external-priority patent/GB9712388D0/en
Priority claimed from GBGB9801226.3A external-priority patent/GB9801226D0/en
Application filed by Concentric Controls Ltd filed Critical Concentric Controls Ltd
Publication of EP0884531A2 publication Critical patent/EP0884531A2/fr
Publication of EP0884531A3 publication Critical patent/EP0884531A3/fr
Application granted granted Critical
Publication of EP0884531B1 publication Critical patent/EP0884531B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples

Definitions

  • the invention relates to a valve assembly for controlling the flow of inflammable gas to a burner such as in a domestic fire.
  • valve assemblies which allow gas to flow to a burner at different rates thereby to control the level of heat output from the burner.
  • such devices generally comprise simple manually operated rotary controls or electronically activated valve actuators which open and close valves to control gas flow.
  • a known actuator can for example comprise a solenoid and accordingly such systems can be expensive to manufacture especially if a number of different levels of gas flow are required.
  • Another known valve assembly is disclosed in DE 910 585 C.
  • An object of the invention is to provide a valve assembly which is operable using a linearly or axially moveable control. Another object of the invention is to provide a valve assembly which is easy to operate and indeed can be manually operated without the need for rotary motion or electronic controls. Another object of the invention is to provide a valve assembly which can provide several different levels of gas flow to a burner.
  • a valve assembly for controlling the flow of flammable gas to a burner, comprising a body having a passageway for flow of gas from an inlet and a valve having a valve seat and a closure which valve is positioned between first and second outlet channels from the passageway wherein the first and second channels are axially separated along the passageway such that axial movement of the closure along the passageway effects opening and closing of the valves.
  • a body having a passageway for flow of gas from an inlet and a valve having a valve seat and a closure which valve is positioned between first and second outlet channels from the passageway wherein the first and second channels are axially separated along the passageway such that axial movement of the closure along the passageway effects opening and closing of the valves.
  • axial movement of the valve can be effected manually using a spindle attached to the valve closure.
  • the valve comprises a valve closure resiliently biased towards a valve seat and means is provided for effecting movement of the closure against the action of the resilient biasing means.
  • the movement means can comprise a spindle on which the valve closure is slidably mounted. Further, the spindle can carry a lug in a fixed axial position for effecting movement of the valve closure.
  • the gas passageway comprises a series of two or more axially aligned sections which sections increase in cross sectional area relative to an upstream neighbouring section.
  • a series of closures of increasing diameter can be used to prevent gas flow between adjacent sections.
  • a metering device is provided to enable a user to determine how many valves in the valve assembly are open and therefore how great the gas flow through to a burner is.
  • the metering device comprises a spindle having one or more recesses which cooperate with a resiliently biased member operably received in the recess. A series of notches can be provided.
  • the metering device which enables a user to accurately select rates of flow through the outlet from the valve assembly can in one form of the invention be provided by a second movable spindle co-operating with a locking device.
  • the second spindle can comprise a series of recesses and co-operate with a resiliently biased device comprising for example a spring and ball bearing arrangement.
  • a micro-switch is located on the valve assembly for deactivating a safety valve when the user locates the means for effecting movement of the valve closure or closures at a predetermined position.
  • the micro-switch co-operates with the second spindle whereby the micro-switch is actuated when the second spindle is placed in a predetermined position such as withdrawn beyond the micro-switch contact.
  • a second micro-switch could be arranged to be operated in the same way, e.g. located at right angles to the first, and to energise additional circuits.
  • means for stabilising the movement of a spindle used to effect movement of the valve closure or closures within the valve assembly.
  • the stabilising means can comprise a second spindle connected by an arm to the closure moving spindle and can therefore provide relative rigidity to the system.
  • valve assembly comprising a body having a gas inlet to a passageway comprising a valve for controlling gas flow from the body, wherein the valve is disposed intermediate two outlet channels which channels are substantially axially parallel to one another and lead to a larger diameter outlet in the body.
  • a large diameter outlet bore can be machined into the valve assembly body and two smaller diameter bores or channels drilled substantially parallel to one another the axis of the larger diameter bore. Therefore parallel machining axes are used reducing the time and cost of machining the valve assembly body.
  • a further aspect of the invention provides a valve for controlling the flow of fluid from an inlet to a series of outlets whereby flow may take place at any of a plurality of different rates, according to the setting of a control member, wherein said outlets are connected by individual branch passages to a common flow passage communicating with said inlet, said control member extends along said common flow passage, and a series of separate flow control valves is disposed in said common flow passage and is arranged for sequential opening or sequential closing when said control member is axially displaced in one or other direction.
  • the invention provides a valve for controlling the flow of fluid comprising a main flow passage having successive axially adjacent portions of increased cross sectional area and connected to an inlet for fluid supply, a control member extending along said passage, a series of valve members each associated with a different one of said portions and enclosed positions arranged to prevent flow from one of said portions to the next adjacent thereof, and means provided on said control member so that in continued axial movement thereof in one direction said valve members are successively moved to and held in open positions, where flow to said next portion(s) is possible, and in continued axial movement thereof in the opposition direction said valve members are successively restored to their closed positions.
  • the invention provides a gas valve comprising a common flow passage having at least two axially successive portions of different diameters, a valve seat formed at the junction of two of said portions, a valve associated with said seat for preventing flow between said two portions, a valve stem for displacing said valve to allow flow, an outlet associated with said valve seat and connected to said common flow passage by a pair of branch passages each extending between a different one of said two portions and the said outlet, whereby flow may occur through said outlet at two different rates according to whether said valve is displaced or not.
  • the invention provides a gas valve comprising a stepped main flow passage having a series of axial portions of successively greater cross sectional area, a separate valve closure element associated with each of at least some of the said portions and arranged when closed to prevent flow from one to the next of said portions, a valve stem extending along said passage, a series of couplings on said stem, each said coupling associable with a different one of said valve closure elements, and the spacing of said valve closure elements and couplings being such that axial movement of said stem displaces the valve closure elements from closed to open position or vice versa according to the direction of movement and in sequence along the passage, and a series of branch passages opening from said main passage connectable to the respective outlets whereby gas flow rate from the outlet(s) depends upon the open or closed status of the respective valves.
  • FIG. 1 there is shown a valve assembly 10 according to the invention comprising an inlet 12 in a body 14 comprising passageway 16 which connects inlet 12 to outlets 18 and 20.
  • Assembly 10 further comprises a safety valve 22 such as a thermoelectric valve which can be maintained open using a thermocouple operably placed in a flame (for example from a pilot light) provided from gas from outlet 18.
  • a safety valve 22 such as a thermoelectric valve which can be maintained open using a thermocouple operably placed in a flame (for example from a pilot light) provided from gas from outlet 18.
  • Outlet channels 24 and 26 are also provided which connect passageway 16 to outlet 20 via a connecting bore 28.
  • Each of channels 24 and 26 comprise flow regulators such a threaded screw valve which varies the cross sectional area at the interface between the respective channel 24 or 26 and bore 28.
  • passageway 16 between inlet 12 and outlet 20 comprises a series of sections. Of significance to the operation of assembly 10, is a first section 30 downstream from safety valve 22, a second section 32 of greater diameter than section 30, and a third section 34 of greater diameter than second section 32.
  • a valve seat 36 for a first valve 37 is provided intermediate sections 30 and 32, and a second valve seat 38 for a second valve 39 is provided intermediate sections 32 and 34.
  • a passageway end closure 40 is provided for preventing leakage of gas adjacent control 42 comprising a spindle 44.
  • Closure 40 can for example comprise an O-ring for sealing against spindle 44.
  • Spindle 44 which in this example comprises two sections which are axially aligned, carries a first valve closure 46 for first valve 37, and a second valve closure 48 for second valve 39.
  • valve 37 comprises a closure 46 having a sealing element 50 which abuts first valve seat 36 to prevent gas flow along passageway 16 (that is between sections 30 and 32).
  • Closure 46 is slidably mounted on spindle 44 and carries an O-ring 52 for sealing against the spindle.
  • an end plate 54 is provided for abutting against a coiled spring 56 also mounted on spindle 44 which abuts lugs 58 remote from closure 46.
  • Lugs 58 could alternatively be a flange on spindle 44 or a circlip for example.
  • Further lugs 60 similar to lugs 58, are provided upstream from valve closure 46 which further comprises an abutting surface 62 which is engaged or contacted by lugs 60 in use to displace the closure.
  • closure 48 of valve 39 comprises a sealing member 62 such as a resilient washer for example made of rubber, which seals against seat 38.
  • Closure 48 is also slidable mounted on spindle 44 and carries an O-ring 64 for sealing against spindle 44 thereby to prevent gas flow along the spindle.
  • an end plate 66 is provided for abutting against a spring 68 which is carried on spindle 44.
  • spring 68 abuts a shoulder of spindle 44 between a smaller diameter section of spindle 44 and a larger diameter section.
  • a recess is provided in closure 48 for receiving the larger diameter section of spindle 44.
  • an abutting surface 72 is provided on the upstream end of closure 48, which surface 72 is abutted by lugs 58 in use.
  • spindle 44 carries a lug such as a circlip 70 for preventing withdrawal of the spindle too far beyond end closure 40.
  • An outlet 33 is provided for testing gas pressure in section 32 in this embodiment. Normally this outlet is sealed.
  • spindle 44 can be withdrawn by sliding spindle 44 axially along passageway 16 and end closure 40.
  • gas is also able to flow through first outlet channel 24 through to outlet 20 governed only by the diameter of the channels, or a flow regulator within channel 24.
  • Valves 37 and 39 are sealed due to the action of springs 56 and 68 respectively on closures 46 and 48 respectively and the relative position of spindle in the body. This action effect a seal at both seats 36 and 38.
  • closure 48 will first contact seat 38 thereby reducing the amount of flow to the burner and eventually closure 46 will abut seat 36 thereby to reduce the flow to a minimum level.
  • An off switch can be provided which for example cuts the flow of the current between the thermocouple and safety valve 22 thereby to close valve 22 and prevent flow of gas to either of outlet 18 or 20.
  • a second valve assembly 110 is shown in Figure 3.
  • a valve assembly 110 comprises an inlet 112 into a body 114 comprising a passageway 116 allowing gas flow through to outlets 118, 120 and 176.
  • Assembly 110 further comprises a safety valve 122, a first valve 137, and a second valve 139.
  • a third valve closure 178 is also used to control gas flow to a burner.
  • passageway 116 comprises four sections of different diameters namely sections 130, 132, 134, and 174.
  • Valves 137 and 139 operate in the same manner as valves 37 and 39 of the first embodiment except that spring 168 is disposed between closure 148 and a third closure 178 comprising a sealing member such as an O-ring 180 which effectively abuts the inner surface of channel 134 to prevent gas flow through to outlet 176.
  • first and second outlet channels 124 and 126 are substantially parallel and, while still axially separated, connect to an outlet 120 having a substantially parallel axis. Accordingly, outlet channels 124 and 126 can be relatively easily drilled into body 114.
  • closure 178 is positioned along spindle 144 at a point which allows a seal on the inner surface of passageway section 134 when lugs 158 lift closure 148 of valve seat 138. Again, it is the relative axial separation of the features which determines the amount of displacement of spindle 144 to effect opening of the valves in turn.
  • FIG. 4 and 5 there is shown a metering device enabling a user to select the position of a spindle 244 in a valve assembly.
  • Spindles 44 and 144 of the embodiments shown require that friction is provided in order to prevent the action of springs 56, 68, 156, or 168 causing spindle 144 to be pushed outwardly to an undesired position.
  • this friction is provided by the O-ring in end closure 40, and in the second embodiment it is provided by the O-ring 180 as well as the O-ring in end closure 140.
  • a spindle restraining force can also be provided externally of body 14 for example using a hand-tightened gland comprising a threaded nut for compressing an O-ring, or simply using the weight of a vertical rod attached to a vertically positioned spindle 44.
  • Such a restraining device can also comprise a metering device for regulating flow of gas.
  • the metering device shown in Figures 4 and 5 comprises an end closure 240 comprising means such as threading 282 for attaching the closure to the valve assembly body.
  • a recess 284 is provided for an O-ring seal to prevent gas leakage through the end closure 240 via bore 286 which receives a spindle 244.
  • a bore 288 is provided, in this example orthogonal to bore 286. Bore 288 can carry a resilient elongate member which protrudes into bore 286 or other means such as a bearing which protrudes into bore 286.
  • Spindle 244 comprises a means 290 such as a threaded bore for connecting to a second section thereby to provide an overall desired length of spindle able to actuate safety valve 22 etc.
  • Spindle 244 further comprises a first annular recess 292 and axially spaced therefrom, a second annular recess 294 and third recess 296.
  • spindle 244 can be depressed when inserted into the body of a valve assembly thereby to effect ignition of a pilot light and thereafter released allowing recess 294 to be engaged by an abutting or resilient member in bore 288 which restricts further axial movement of spindle 244.
  • This position could indicate to the user that only the pilot light is on in the second embodiment or the pilot light plus the low rate flow is on in the first embodiment.
  • a second level of gas flow through to a burner can be provided and finally, third recess 296 can be used to indicate a third level of gas flow through to a burner.
  • An appropriate number of recesses or notches can be provided in accordance with the number of levels of gas throughput from a valve assembly to a burner.
  • the spindle 144 can be manually operated to provide easy control of gas through to a gas fire for example.
  • an actuator such as a servo-motor could be used to effect the axial movement of spindle 144 to control gas flow.
  • Valve assembly 310 is substantially similar to valve assembly 10 shown in Figures 1 and 2 and accordingly like features are given the same two digit reference number prefixed with the numeral 3.
  • the means of monitoring or metering gas flow through the outlet 320 that is indicating to the user the setting of the valve assembly, is positioned remote from spindle 344.
  • spindle 344 carries an extension 345 for operation by a user.
  • Spindle 344 further carries a connecting arm 347, such as a stiff rod, connecting it to a second spindle 349 which is received in a bore 329 within the valve body.
  • bore 329 is a larger diameter region of bore 328 isolated therefrom by a plug 331. Bore 329 is substantially parallel to passageway 16. Accordingly, the connection of spindle 344 to spindle 349 provides greater rigidity to the assembly and assists in guiding spindle 344 axially along passageway 16. Additionally however, user spindle 349 enables the location of a micro-switch M and a biased locking device 397 remote from spindle 344. Accordingly, a bore 388 is provided for receiving a locking device 397 such as a ball bearing received within the bore or recess 388 and biased towards 399 by a spring arrangement. Similarly micro-switch M can be attached to the valve assembly body and located adjacent spindle 349 so that a resiliently biased member or contact arm abuts spindle 349.
  • safety valve 322 In use therefore, by moving spindle 344 in to the valve assembly body, safety valve 322 is opened allowing gas to flow between inlet 312 and first outlet 318. At the same time, a micro-switch not shown can be actuated in order to ignite the gas at a pilot light. As described above, when the pilot light 318 is lit, safety valve 322 is retained open and accordingly a user is able to adjust the rate of flow to the burner via outlet 320 by withdrawing spindle 344. When locking device 397 is located in recess 392, this indicates to the user that the burner is on a first rate setting whereby gas flows through first regulator 324 to the outlet 320. By withdrawing spindle 344 further, this causes spindle 349 to be withdrawn from valve 329.

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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)
  • Lift Valve (AREA)

Claims (21)

  1. Ensemble de soupape pour commander l'écoulement d'un gaz inflammable vers un brûleur, comprenant un corps (14) présentant un passage (16) pour l'écoulement du gaz depuis une admission (17) et une soupape (37) possédant un siège de soupape et une fermeture, soupape positionnée entre des premier (18) et second (20) canaux d'évacuation depuis le passage dans lequel les premier et second canaux d'évacuation sont séparés axialement le long du passage de sortie pour que le déplacement axial de la fermeture le long du passage provoque l'ouverture ou la fermeture de la soupape, ensemble dans lequel le passage comprend une série de deux zones coaxiales (30, 32, 34) ou plus dont les sections augmentent en superficie par rapport à une section adjacente en amont ; une série de fermetures (46, 48) de diamètre croissant actionnables pour empêcher l'écoulement du gaz entre les zones adjacentes, et une tige (44) sur laquelle les fermetures de soupape sont montées à coulissement.
  2. Ensemble de soupape selon la revendication 1, dans lequel le déplacement axial des fermetures de soupape peut être effectué de manière manuelle en utilisant la tige.
  3. Ensemble de soupape selon la revendication 1 ou 2, dans lequel la soupape comprend une fermeture de soupape en rappel élastique vers un siège de soupape.
  4. Ensemble de soupape selon l'une quelconque des revendications précédentes, dans lequel la tige porte une patte dans une position axiale fixe pour effecteur le mouvement de fermeture de la soupape.
  5. Ensemble de soupape selon l'une quelconque des revendications précédentes, comprenant un dispositif de mesure permettant à un utilisateur de déterminer le nombre de fermetures dans l'ensemble de soupape ouvertes et de déterminer ainsi le taux d'écoulement du gaz à travers un brûleur.
  6. Ensemble de soupape selon la revendication 5, dans lequel le dispositif de mesure comprend une tige présentant un ou plusieurs évidements qui coopèrent avec un élément en rappel de manière élastique reçu dans l'évidement pour fonctionner.
  7. Ensemble de soupape selon la revendication 6, dans lequel une série d'encoches est formée dans la tige.
  8. Ensemble de soupape selon la revendication 5, 6 ou 7, dans lequel le dispositif de mesure comprend une seconde tige mobile coopérant avec un dispositif de verrouillage.
  9. Ensemble de soupape selon la revendication 8, dans lequel la seconde tige peut comporter une série d'évidements et peut coopérer avec un dispositif en rappel élastique comprenant par exemple un roulement à billes.
  10. Ensemble de soupape selon l'une quelconque des revendications précédentes, comprenant un moyen du type micro-interrupteur situé sur l'ensemble de soupape pour désactiver une soupape de sécurité lorsque l'utilisateur positionne le moyen pour effectuer le déplacement de la fermeture de soupape ou des fermetures de soupape dans une position prédéterminée.
  11. Ensemble de soupape selon la revendication 10, dans lequel le micro-interrupteur coopère avec la seconde tige par laquelle le micro-interrupteur est actionné lorsque la seconde tige est placée dans une position prédéterminée telle qu'en retrait au-delà du contact du micro-interrupteur.
  12. Ensemble de soupape selon la revendication 10 ou 11, comprenant un second micro-interrupteur prévu pour être actionné de la même manière, par exemple placé perpendiculaire au premier et pour alimenter des circuits supplémentaires.
  13. Ensemble de soupape selon l'une quelconque des revendications précédentes, comprenant un moyen pour stabiliser le déplacement d'une tige utilisée pour effectuer le déplacement de la fermeture de soupape ou des fermetures de soupape dans l'ensemble de soupape.
  14. Ensemble de soupape selon la revendication 13, dans lequel le moyen de stabilisation comporte une deuxième tige reliée par un bras à la tige mobile de fermeture et procure ainsi une rigidité relative au système.
  15. Ensemble de soupape selon l'une quelconque des revendications précédentes, dans lequel une fermeture de soupape est disposée entre deux canauxd'évacuation, ces canaux étant sensiblement axialement parallèles l'un à l'autre et conduisant vers un orifice d'évacuation de plus grand diamètre dans le corps.
  16. Ensemble de soupape selon la revendication 15, comprenant une évacuation de plus grand diamètre usinée dans l'ensemble de soupape et deux orifices ou canaux d'évacuation de plus petit diamètre percés sensiblement parallèles l'un à l'autre et à l'axe de l'orifice de plus grand diamètre.
  17. Ensemble de soupape selon l'une quelconque des revendications précédentes comprenant une série d'orifices d'évacuation par lesquels l'écoulement peut avoir lieu selon n'importe lequel parmi une pluralité de débits différents, en fonction du réglage de la tige, dans lequel lesdits orifices d'évacuation sont raccordés par des passages individuels ramifiés à un passage d'écoulement commun communiquant avec ladite admission, ledit élément de commande se prolongeant le long dudit passage d'écoulement commun, et une série de soupapes de commande d'écoulement distinctes étant disposée dans ledit passage d'écoulement commun et prévues pour s'ouvrir de manière séquentielle ou se fermer de manière séquentielle lorsque ladite tige est déplacée axialement dans l'une ou l'autre direction.
  18. Ensemble de soupape selon l'une quelconque des revendications précédentes, comprenant une série de clapets de soupape, chacun étant affecté à une zone différente parmi lesdites zones coaxiales prévues pour empêcher l'écoulement provenant d'une desdites zones vers la zone adjacente de celles-ci, et un moyen prévu sur ladite tige pour que par un déplacement axial continu de celle-ci dans une direction, lesdits clapets de soupape soient successivement déplacés et maintenus en position ouverte, dans laquelle l'écoulement vers la(es)dite(s) zone(s) est possible, et par un déplacement axial continu de celle-ci dans la direction opposée lesdits clapets de soupape sont successivement remis dans leurs positions fermées.
  19. Ensemble de soupape selon la revendication 18, comprenant une série de passages d'évacuation chaque ouverture depuis une desdites zones correspondantes étant prévue pour permettre un écoulement à un débit différent en fonction de la soupape ou des soupapes qui est ou sont en position ouverte.
  20. Ensemble de soupape à gaz selon l'une quelconque des revendications précédentes, comprenant un passage d'écoulement commun présentant au moins deux zones axialement successives de diamètres différents, un siège de soupape formé à la jonction de deux des zones, une soupape associée au siège pour empêcher l'écoulement entre les deux zones, une tige de soupape pour déplacer ladite soupape et permettre ainsi l'écoulement, un orifice d'évacuation propre au siège de soupape et raccordé au passage d'écoulement commun par deux passages ramifiés s'étendant chacun entre une zone différente desdites deux zones et ledit orifice d'évacuation, par lesquels l'écoulement peut se produire à travers ledit orifice d'évacuation à deux débits différents selon que la soupape est déplacée ou non.
  21. Ensemble de soupape selon l'une quelconque des revendications précédentes, comprenant un passage d'écoulement principal étagé présentant une série de zones axiales de superficie de section successivement supérieure, un élément de fermeture de soupape distinct associé à chacune d'au moins quelques une desdites zones et prévu lorsqu'il est fermé pour empêcher l'écoulement provenant d'une zone vers la suivante desdites zones, une tige de soupape se prolongeant le long dudit passage, une série de raccords sur ladite tige de soupape, chacun desdits raccords pouvant être associé à un élément différent desdits éléments de fermeture de soupape, et l'espacement desdits éléments de fermeture de soupape et des raccords étant tel que le déplacement axial de ladite tige déplace les éléments de fermeture de soupape d'une position fermée dans une position ouverte ou vice versa en fonction de la direction du déplacement et en séquence le long du passage, et une série de passages ramifiés s'ouvrant depuis ledit passage principal et pouvant être raccordés aux orifices de sortie respectifs où le débit d'écoulement de gaz depuis la/les orifice(s) de sortie dépend de l'état ouvert ou fermé des soupapes respectives.
EP98304666A 1997-06-14 1998-06-12 Assemblage de soupape Expired - Lifetime EP0884531B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9712388.9A GB9712388D0 (en) 1997-06-14 1997-06-14 Valve assembly
GB9712388 1997-06-14
GBGB9801226.3A GB9801226D0 (en) 1998-01-22 1998-01-22 Valve assembly
GB9801226 1998-01-22

Publications (3)

Publication Number Publication Date
EP0884531A2 EP0884531A2 (fr) 1998-12-16
EP0884531A3 EP0884531A3 (fr) 2000-06-07
EP0884531B1 true EP0884531B1 (fr) 2003-09-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98304666A Expired - Lifetime EP0884531B1 (fr) 1997-06-14 1998-06-12 Assemblage de soupape

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EP (1) EP0884531B1 (fr)
DE (1) DE69817680T2 (fr)
DK (1) DK0884531T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6523254B1 (en) * 2000-04-19 2003-02-25 Micron Technology, Inc. Method for gate blocking x-outs during a molding process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE910585C (de) * 1951-08-01 1954-05-03 Richard Huelzer Gasbeheizter Fluessigkeits-Durchlauferhitzer
ES305095A1 (es) * 1964-09-23 1965-05-01 Contigea Sa Valvula de seguridad por termopar.
US3451407A (en) * 1967-06-23 1969-06-24 Controls Co Of America Flow interrupter gas control with safety interlock preventing reset while electromagnet is energized
FR2426863A1 (fr) * 1978-05-23 1979-12-21 Saunier Duval Electrovalve tous gaz a ouverture progressive pour la commande et la regulation de l'arrivee du gaz a un bruleur d'appareils du genre chaudiere a gaz

Also Published As

Publication number Publication date
DE69817680D1 (de) 2003-10-09
EP0884531A3 (fr) 2000-06-07
DK0884531T3 (da) 2004-01-12
DE69817680T2 (de) 2004-07-22
EP0884531A2 (fr) 1998-12-16

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