EP2904306B1 - Residual pressure valve device, valve and cylinder having such a device - Google Patents

Residual pressure valve device, valve and cylinder having such a device Download PDF

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Publication number
EP2904306B1
EP2904306B1 EP13782772.1A EP13782772A EP2904306B1 EP 2904306 B1 EP2904306 B1 EP 2904306B1 EP 13782772 A EP13782772 A EP 13782772A EP 2904306 B1 EP2904306 B1 EP 2904306B1
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EP
European Patent Office
Prior art keywords
closure member
gas
diameter
seat
pressure
Prior art date
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EP13782772.1A
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German (de)
French (fr)
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EP2904306A1 (en
Inventor
Guillaume Roberge
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Publication of EP2904306A1 publication Critical patent/EP2904306A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0338—Pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/048—Methods for emptying or filling by maintaining residual pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled

Definitions

  • the present invention relates to a residual pressure valve device and a valve and a gas cylinder comprising such a device.
  • Residual pressure valve devices are provided to prevent complete emptying of a pressurized gas cylinder. These devices are generally arranged upstream of a pressure regulator (upstream in the direction of withdrawal of the gas).
  • Such a device is known to DE 197 09 096 A1 .
  • An object of the present invention is to overcome all or part of the disadvantages of the prior art noted above.
  • the residual pressure valve device comprises a body, a shutter movable in the body relative to a seat for selectively allowing or interrupting a flow of gas between a fluid inlet and a fluid outlet, a biasing member requesting by default the shutter towards the seat towards its position of interruption of flow, the shutter comprising an internal channel having a first end in communication with the gas inlet and a second end opening, via a calibrated orifice, in a chamber the control chamber being closed sealingly by a downstream end of the shutter so that, when the gas pressure in the control chamber reaches a determined threshold, this pressure causes a force displacement of the shutter against the force of the return member, to move the shutter of the seat and thus allow a flow of gas between the inlet and the fluid outlet, the body of the shutter comprising, between the seat and the downstream end of the shutter, a first portion forming a male member movable in translation in a female passage of the body with a determined adjustment forming a restriction ensuring a Partial and progressive opening of the gas passage between
  • the invention also relates to a pressurized gas bottle tap, comprising a withdrawal circuit having an upstream end intended to be connected to a storage volume of a pressurized gas bottle and a downstream end intended to be connected to a gas user apparatus withdrawn from the bottle, the withdrawal circuit comprising, arranged in series upstream between the upstream end and the downstream end, an isolation valve and a residual pressure valve device, wherein the device residual pressure valve is in accordance with any of the above characteristics or hereinafter.
  • the invention also relates to a pressurized gas cylinder comprising such a valve.
  • the device 100 of residual pressure valve illustrated in the figures comprises a body 9 housing a movable shutter 1. More specifically, the shutter 1 is movable in translation relative to a seat 2 to selectively close or open a gas passage between a fluid inlet 3 and a fluid outlet 4.
  • the inlet 3 is for example connected to the outlet of an isolation valve 14 situated upstream on a circuit 12 for withdrawing a valve 15 from a bottle 13 of gas under pressure (cf. figure 1 ).
  • the fluid outlet 4 is for example connected to a pressure regulator 16 located downstream on the withdrawal circuit 12 and which is configured to ensure a relaxation of the gas pressure to a predetermined value.
  • the withdrawal circuit 12 comprises for this purpose an upstream end 112 connected to the storage volume of the bottle 13 and a downstream end 212 intended to be connected selectively to a gas user device withdrawn from the bottle 13.
  • the device 100 comprises a return member 5 biasing the shutter 1 by default to the seat 2 (from an upstream direction to a downstream direction).
  • the shutter 1 comprises an internal channel 6 having a first end in communication with the gas inlet 3 and a second end opening, via a calibrated orifice 8, in a control chamber 7 formed in the body 9.
  • pilot chamber 7 is closed sealingly at one end by a downstream end of the shutter 1 (for example via a seal 17, in particular O-ring).
  • the internal channel 6 can convey high pressure gas that arrives through the inlet 3 (for example when opening the upstream valve 14) into the control chamber 7.
  • the gas pressure in the control chamber 7 reaches a predetermined threshold, this pressure causes a sufficient displacement force on the shutter 1 from the downstream direction to the upstream direction to move it away from the seat 2. This then allows a flow of gas between the fluid inlet 3 and the fluid outlet 4.
  • This internal channel architecture and control chamber 7 forms a mechanism requiring sufficient upstream gas pressure to open the valve (i.e., a residual pressure valve mechanism).
  • the body of the shutter 1 comprises, between its portion cooperating selectively with the seat 2 and the downstream end of the shutter 1, a first portion 11 forming a male member movable in translation in a female passage of the body 9 with a determined adjustment forming a restriction ensuring a partial and progressive opening of the opening for the gas between the inlet 3 and the outlet 4 (cf. figures 3 and 4 ).
  • the first portion 11 is cylindrical and has a determined diameter D4 whereas the female passage of the body 9 which receives it is a cylindrical bore of diameter D5 determined so as to form a usual game, fine or precise, for example of the type H8 f7 according to the ISO standard of adjustment.
  • the shutter 1 moves away from its seat 2 and opens a passage of gas between the first portion 11 of the shutter and the body 9.
  • the diameter D2 of the opening delimited by the seat 2 is equal to or very close to the section (diameter D5) of the female passage of the body 9.
  • the small clearance between the first portion 11 of the shutter and the body 9 ensures a progressive gas passage and a gradual opening (see the path of the gas symbolized by arrows to figure 3 and 4 ).
  • the rise in the pressure downstream of the shutter 1 is all the more progressive as the shutter 1 has a large inertia and that the rolling at the adjustment is carried out along a large stroke along the shutter 1 (for example, the first portion has a length of between 2 and 6mm).
  • the shutter 1 continues its stroke against the spring 5 until a second portion 12 of the shutter arrives at the passage of the body 9.
  • This second portion 12 has a smaller section than the first portion and allows a more massive gas passage (cf. figure 5 ).
  • the section of passage between the body 9 and the second portion 12 (corresponding to a state of the open valve) is chosen so that the pressure drop generated by the passage of the gas is negligible, typically this section is at least equivalent to the passage section of the valve 14 located upstream in the circuit 12.
  • the device makes it possible to maintain a flow rate and an outlet pressure up to the calibration threshold of the residual pressure valve device without creating a parasitic pressure drop, as is the case in the residual pressure valves ("RPV" ”) Classics.
  • the device does not limit the withdrawal of gas from the bottle beyond its calibration pressure.
  • this device has an architecture that does not trap gas under pressure in its mechanism that can cause damage or requiring the use of special seals (via plastomers for example).
  • the structure of the device avoids the trapping of high pressure gas downstream of the residual pressure valve as is conventionally the case according to the prior art. Indeed, when pressurized gas is trapped in the valve, this generates significant efforts, particularly in terms of sealing at the seat. This can lead to a destruction of the seal.
  • the geometry of the device makes it possible to use elastomers (typically O-rings 17, 27) thus making it possible to obtain very good levels of pressure. seals unlike seals with plastic (such as for example PEEK®, TORLON®, or TEFLON®).
  • the device incorporates both a residual pressure holding function and a progressive opening device reducing or eliminating shocks such as "water hammer”.
  • the device can absorb sudden pressure rises due to rapid opening of an upstream isolation valve 14.
  • the upstream end of the shutter 1 has a diameter D1 for example between 4 and 5mm, for example 4.3mm.
  • the diameter D2 of the seat is equal for example to 4.3 mm as the diameter D3 of the lower end of the shutter 1.
  • the diameter D4 of the first portion 11 of the shutter 1 is equal for example to 4.3mm.
  • the diameter D5 of the bore forming the passage for the shutter 1 is itself determined with respect to the diameter of the first portion 11 according to the desired adjustment (for example H8, f7)
  • the diameter D6 of the calibrated orifice is for example equal to 0.1 mm and the force of the return spring 5 is for example 30Newtons.
  • the opening of the passage is obtained when the pressure in the control chamber 7 reaches about 90 bar.
  • the opening of the valve takes place when the pressure in the pilot chamber 7 reaches about 22bar.
  • the shutter 1 closes the passage again by leaning on the seat 2 at the end of withdrawal, at an inlet pressure of about 21 bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Safety Valves (AREA)
  • Lift Valve (AREA)
  • Control Of Fluid Pressure (AREA)

Description

La présente invention concerne un dispositif de clapet de pression résiduelle ainsi qu'un robinet et une bouteille de gaz comportant un tel dispositif.The present invention relates to a residual pressure valve device and a valve and a gas cylinder comprising such a device.

Les dispositifs de clapet de pression résiduelle sont prévus pour éviter la vidange complète d'une bouteille de gaz sous pression. Ces dispositifs sont généralement disposés en amont d'un détendeur de pression (en amont selon le sens de soutirage du gaz).Residual pressure valve devices are provided to prevent complete emptying of a pressurized gas cylinder. These devices are generally arranged upstream of a pressure regulator (upstream in the direction of withdrawal of the gas).

Un tel dispositif est connu de DE 197 09 096 A1 .Such a device is known to DE 197 09 096 A1 .

De tels dispositifs créent cependant des pertes de charges sur le circuit de soutirage du gaz. Les dispositifs connus génèrent une perte de charge égale à la pression de tarage du clapet de pression résiduel. De ce fait, compte-tenu des caractéristiques du détendeur en aval (débit/pression), le débit de soutirage ne peut être fourni que jusqu'à la pression de tarage du clapet de pression résiduelle mais ce débit chute rapidement lorsque l'on s'approche de la pression de tarage du clapet. Par exemple, pour un dispositif de clapet de pression résiduelle taré à 20bar, le débit de soutirage et la pression de sortie d'un détendeur aval chutent à partir de 35 à 40bar.Such devices, however, create losses in the gas withdrawal circuit. The known devices generate a pressure drop equal to the calibration pressure of the residual pressure valve. Therefore, taking into account the characteristics of the downstream regulator (flow / pressure), the withdrawal flow can be provided only up to the calibration pressure of the residual pressure valve but this flow rate drops rapidly when one s approach of the calibration pressure of the valve. For example, for a residual pressure valve device calibrated at 20 bar, the withdrawal flow rate and the outlet pressure of a downstream regulator fall from 35 to 40 bar.

De plus, lors de l'ouverture d'une vanne d'isolation en amont d'un tel dispositif, l'arrivée d'un flux de gaz à haute pression peut engendrer un phénomène dit de « coup de bélier », c'est-à-dire une surpression due à une variation brusque de la pression et de la vitesse de gaz.In addition, when opening an isolation valve upstream of such a device, the arrival of a flow of gas at high pressure can cause a phenomenon called "water hammer" is that is, an overpressure due to a sudden change in pressure and gas velocity.

Un but de la présente invention est de pallier tout ou partie des inconvénients de l'art antérieur relevés ci-dessus.An object of the present invention is to overcome all or part of the disadvantages of the prior art noted above.

A cette fin, le dispositif de clapet de pression résiduelle comprend un corps, un obturateur mobile dans le corps relativement à un siège pour sélectivement autoriser ou interrompre un flux de gaz entre une entrée de fluide et une sortie de fluide, un organe de rappel sollicitant par défaut l'obturateur vers le siège vers sa position d'interruption du flux, l'obturateur comprenant un canal interne ayant une première extrémité en communication avec l'entrée de gaz et une seconde extrémité débouchant, via un orifice calibré, dans une chambre de pilotage, la chambre de pilotage étant refermée de façon étanche par une extrémité aval de l'obturateur de façon que, lorsque la pression de gaz dans la chambre de pilotage atteint un seuil déterminé, cette pression provoque un effort déplacement de l'obturateur à l'encontre de l'effort de l'organe de rappel, pour écarter l'obturateur du siège et ainsi autoriser un flux de gaz entre l'entrée et la sortie de fluide, le corps de l'obturateur comprenant, entre le siège et l'extrémité aval de l'obturateur, une première portion formant un élément mâle mobile en translation dans un passage femelle du corps avec un ajustement déterminé formant une restriction assurant une ouverture partielle et progressive du passage pour le gaz entre l'entrée et la sortie.To this end, the residual pressure valve device comprises a body, a shutter movable in the body relative to a seat for selectively allowing or interrupting a flow of gas between a fluid inlet and a fluid outlet, a biasing member requesting by default the shutter towards the seat towards its position of interruption of flow, the shutter comprising an internal channel having a first end in communication with the gas inlet and a second end opening, via a calibrated orifice, in a chamber the control chamber being closed sealingly by a downstream end of the shutter so that, when the gas pressure in the control chamber reaches a determined threshold, this pressure causes a force displacement of the shutter against the force of the return member, to move the shutter of the seat and thus allow a flow of gas between the inlet and the fluid outlet, the body of the shutter comprising, between the seat and the downstream end of the shutter, a first portion forming a male member movable in translation in a female passage of the body with a determined adjustment forming a restriction ensuring a Partial and progressive opening of the gas passage between the inlet and the outlet.

Par ailleurs, des modes de réalisation de l'invention peuvent comporter l'une ou plusieurs des caractéristiques suivantes :

  • entre la première portion et l'extrémité aval de l'obturateur, le corps de l'obturateur comprend une seconde portion de section réduite par rapport à la section de la première portion, pour former un passage définissant une ouverture agrandi pour le gaz entre l'entrée et la sortie,
  • les dimensions de l'ouverture délimitée par le siège diffèrent d'au plus de 30% par rapport aux dimensions de la section de la première portion de l'obturateur,
  • l'ouverture délimitée par le siège est circulaire et a un diamètre compris entre trois et six millimètres et diffère d'au plus 1 mm par rapport au diamètre de la première portion de l'obturateur qui est cylindrique,
  • la première portion est cylindrique de diamètre déterminé et le passage femelle du corps est un alésage cylindrique de diamètre déterminé de façon à former un jeu usuel ou précis entre l'obturateur et le passage femelle du corps, par exemple un jeu du type H8 f7 selon la norme ISO d'ajustement,
  • l'obturateur est mobile en translation dans le corps selon une direction amont/aval, la première portion a une longueur selon la direction amont/aval comprise entre deux et huit millimètres et de préférence comprise entre trois et quatre millimètres,
  • l'orifice calibré a un diamètre compris entre 0,01 mm et 0,50mm et de préférence compris entre 0,10mm et 0,30mm pour réguler la vitesse de montée en pression dans la chambre de pilotage, cette vitesse de montée en pression étant fonction par ailleurs de la pression de gaz à l'entrée (3) et du volume de ladite chambre de pilotage,
  • l'ouverture délimitée par le siège est circulaire et a un diamètre de 4,3mm, la première portion est cylindrique et a un diamètre de 4,3mm, le passage femelle du corps est un alésage cylindrique de longueur comprise entre 3 et 4mm et de diamètre déterminé pour former avec la première portion un ajustement de type H8 f7, l'orifice calibré ayant un diamètre compris entre 0,08mm et 0,12mm et l'organe de rappel étant un ressort exerçant sur l'obturateur une force comprise entre 20 et 100 newtons.
Furthermore, embodiments of the invention may include one or more of the following features:
  • between the first portion and the downstream end of the shutter, the shutter body comprises a second portion of reduced section relative to the section of the first portion, to form a passage defining an enlarged opening for the gas between the entrance and exit,
  • the dimensions of the aperture delimited by the seat differ by at most 30% from the dimensions of the section of the first portion of the shutter,
  • the opening defined by the seat is circular and has a diameter of between three and six millimeters and differs by at most 1 mm from the diameter of the first portion of the shutter which is cylindrical,
  • the first portion is cylindrical of determined diameter and the female passage of the body is a cylindrical bore of diameter determined so as to form a usual or precise clearance between the shutter and the female passage of the body, for example a game of the type H8 f7 according to the ISO standard of adjustment,
  • the shutter is movable in translation in the body in an upstream / downstream direction, the first portion has a length in the upstream / downstream direction of between two and eight millimeters and preferably between three and four millimeters,
  • the calibrated orifice has a diameter of between 0.01 mm and 0.50 mm and preferably between 0.10 mm and 0.30 mm to regulate the rate of rise in pressure in the control chamber, this pressure increase speed being function also of the gas pressure at the inlet (3) and the volume of said pilot chamber,
  • the opening defined by the seat is circular and has a diameter of 4.3 mm, the first portion is cylindrical and has a diameter of 4.3 mm, the female passage of the body is a cylindrical bore of length between 3 and 4 mm and diameter determined to form with the first portion an adjustment of the type H8 f7, the calibrated orifice having a diameter of between 0.08mm and 0.12mm and the return member being a spring exerting on the shutter a force of between and 100 newtons.

L'invention concerne également un robinet de bouteille de gaz sous pression, comprenant un circuit de soutirage ayant une extrémité amont destinée à être reliée à un volume de stockage d'une bouteille de gaz sous pression et une extrémité aval destinée à être reliée à un appareil utilisateur de gaz soutiré de la bouteille, le circuit de soutirage comprenant, disposés en série d'amont entre l'extrémité amont et l'extrémité aval, un clapet d'isolement et un dispositif de clapet de pression résiduelle, dans lequel le dispositif de clapet de pression résiduelle est conforme à l'une quelconque des caractéristiques ci-dessus ou ci-après.The invention also relates to a pressurized gas bottle tap, comprising a withdrawal circuit having an upstream end intended to be connected to a storage volume of a pressurized gas bottle and a downstream end intended to be connected to a gas user apparatus withdrawn from the bottle, the withdrawal circuit comprising, arranged in series upstream between the upstream end and the downstream end, an isolation valve and a residual pressure valve device, wherein the device residual pressure valve is in accordance with any of the above characteristics or hereinafter.

L'invention concerne également une bouteille de gaz sous pression comprenant un tel robinet.The invention also relates to a pressurized gas cylinder comprising such a valve.

D'autres particularités et avantages apparaîtront à la lecture de la description ci-après, faite en référence aux figures dans lesquelles :

  • la figure 1 représente une vue de côté, schématique et partielle, illustrant un exemple de bouteille de gaz sous pression munie d'un robinet pouvant mettre en oeuvre l'invention,
  • la figure 2 représente une vue en coupe, schématique et partielle, illustrant la structure d'un exemple de dispositif de clapet de pression résiduelle dans une première configuration fermée,
  • les figures 3 et 4 représentent le dispositif de clapet de pression résiduel de la figure 2 selon respectivement deux configurations partiellement ouvertes distinctes,
  • la figure 5 représente le dispositif de la figure 2 selon une configuration totalement ouverte.
Other particularities and advantages will appear on reading the following description, made with reference to the figures in which:
  • the figure 1 represents a side view, schematic and partial, illustrating an example of a pressurized gas cylinder provided with a tap that can implement the invention,
  • the figure 2 is a schematic and partial sectional view illustrating the structure of an example of a residual pressure valve device in a first closed configuration,
  • the figures 3 and 4 represent the residual pressure valve device of the figure 2 according respectively to two distinct partially open configurations,
  • the figure 5 represents the device of the figure 2 in a totally open configuration.

Le dispositif 100 de clapet de pression résiduelle illustré aux figures comprend un corps 9 abritant un obturateur 1 mobile. Plus précisément, l'obturateur 1 est mobile en translation par rapport à un siège 2 pour sélectivement fermer ou ouvrir un passage de gaz entre une entrée 3 de fluide et une sortie 4 de fluide.The device 100 of residual pressure valve illustrated in the figures comprises a body 9 housing a movable shutter 1. More specifically, the shutter 1 is movable in translation relative to a seat 2 to selectively close or open a gas passage between a fluid inlet 3 and a fluid outlet 4.

L'entrée 3 est par exemple reliée à la sortie d'un clapet 14 d'isolement situé en amont sur un circuit 12 de soutirage d'un robinet 15 d'une bouteille 13 de gaz sous pression (cf. figure 1). La sortie 4 de fluide est par exemple reliée à un détendeur 16 de pression situé en aval sur le circuit 12 de soutirage et qui est configuré pour assurer une détente de la pression du gaz à une valeur déterminée. Par exemple, le circuit 12 de soutirage comprend à cet effet une extrémité amont 112 reliée au volume de stockage de la bouteille 13 et une extrémité aval 212 destinée à être reliée sélectivement à un appareil utilisateur de gaz soutiré de la bouteille 13.The inlet 3 is for example connected to the outlet of an isolation valve 14 situated upstream on a circuit 12 for withdrawing a valve 15 from a bottle 13 of gas under pressure (cf. figure 1 ). The fluid outlet 4 is for example connected to a pressure regulator 16 located downstream on the withdrawal circuit 12 and which is configured to ensure a relaxation of the gas pressure to a predetermined value. For example, the withdrawal circuit 12 comprises for this purpose an upstream end 112 connected to the storage volume of the bottle 13 and a downstream end 212 intended to be connected selectively to a gas user device withdrawn from the bottle 13.

Le dispositif 100 comprend un organe 5 de rappel sollicitant par défaut l'obturateur 1 vers le siège 2 (d'une direction amont vers une direction aval).The device 100 comprises a return member 5 biasing the shutter 1 by default to the seat 2 (from an upstream direction to a downstream direction).

De plus, l'obturateur 1 comprend un canal interne 6 ayant une première extrémité en communication avec l'entrée 3 de gaz et une seconde extrémité débouchant, via un orifice 8 calibré, dans une chambre 7 de pilotage formée dans le corps 9. La chambre 7 de pilotage est refermée de façon étanche à une extrémité par une extrémité aval de l'obturateur 1 (par exemple via un joint 17, notamment torique). De cette façon, le volume de la chambre 7 de pilotage varie selon la position de l'obturateur 1 par rapport au siège 2. Le canal 6 interne permet d'acheminer du gaz à haute pression qui arrive par l'entrée 3 (par exemple lors d'une ouverture de la vanne 14 amont) jusque dans la chambre 7 de pilotage. Lorsque la pression de gaz dans la chambre 7 de pilotage atteint un seuil déterminé, cette pression provoque un effort de déplacement suffisant sur l'obturateur 1 de la direction aval vers la direction amont pour l'écarter du siège 2. Ceci autorise alors un flux de gaz entre l'entrée 3 de fluide et la sortie 4 de fluide.In addition, the shutter 1 comprises an internal channel 6 having a first end in communication with the gas inlet 3 and a second end opening, via a calibrated orifice 8, in a control chamber 7 formed in the body 9. pilot chamber 7 is closed sealingly at one end by a downstream end of the shutter 1 (for example via a seal 17, in particular O-ring). In this way, the volume of the control chamber 7 varies according to the position of the shutter 1 relative to the seat 2. The internal channel 6 can convey high pressure gas that arrives through the inlet 3 (for example when opening the upstream valve 14) into the control chamber 7. When the gas pressure in the control chamber 7 reaches a predetermined threshold, this pressure causes a sufficient displacement force on the shutter 1 from the downstream direction to the upstream direction to move it away from the seat 2. This then allows a flow of gas between the fluid inlet 3 and the fluid outlet 4.

Cette architecture de canal interne et chambre 7 de pilotage forme un mécanisme nécessitant une pression de gaz en amont suffisante pour ouvrir le clapet (c'est-à-dire un mécanisme de clapet de pression résiduelle).This internal channel architecture and control chamber 7 forms a mechanism requiring sufficient upstream gas pressure to open the valve (i.e., a residual pressure valve mechanism).

De plus, le corps de l'obturateur 1 comporte, entre sa partie coopérant sélectivement avec le siège 2 et l'extrémité aval de l'obturateur 1, une première portion 11 formant un élément mâle mobile en translation dans un passage femelle du corps 9 avec un ajustement déterminé formant une restriction assurant une ouverture partielle et progressive de l'ouverture pour le gaz entre l'entrée 3 et la sortie 4 (cf. figures 3 et 4).In addition, the body of the shutter 1 comprises, between its portion cooperating selectively with the seat 2 and the downstream end of the shutter 1, a first portion 11 forming a male member movable in translation in a female passage of the body 9 with a determined adjustment forming a restriction ensuring a partial and progressive opening of the opening for the gas between the inlet 3 and the outlet 4 (cf. figures 3 and 4 ).

Par exemple, la première portion 11 est cylindrique et a un diamètre D4 déterminé tandis que le passage femelle du corps 9 qui la reçoit est un alésage cylindrique de diamètre D5 déterminé de façon à former un jeu usuel, fin ou précis, par exemple du type H8 f7 selon la norme ISO d'ajustement.For example, the first portion 11 is cylindrical and has a determined diameter D4 whereas the female passage of the body 9 which receives it is a cylindrical bore of diameter D5 determined so as to form a usual game, fine or precise, for example of the type H8 f7 according to the ISO standard of adjustment.

Ainsi, lors de l'ouverture d'une vanne 14 amont, la pression arrive au niveau de l'entrée 3 puis transite dans la chambre 7 de pilotage. La pression monte progressivement dans la chambre 7 de pilotage. Cette vitesse de montée en pression dépend notamment de la pression en amont au niveau de l'entrée 3 amont, du volume de la chambre 7 de pilotage et de la section ou diamètre D6 de l'orifice calibré 8.Thus, when an upstream valve 14 is opened, the pressure arrives at the inlet 3 and then passes through the control chamber 7. The pressure gradually rises in the control chamber 7. This rate of rise in pressure depends in particular on the upstream pressure at the upstream inlet 3, the volume of the piloting chamber 7 and the section or diameter D6 of the calibrated orifice 8.

Lorsque la pression dans cette chambre 7 de pilotage atteint le seuil de pression déterminé d'ouverture, l'obturateur 1 s'écarte de son siège 2 et ouvre un passage de gaz entre la première portion 11 de l'obturateur et le corps 9. De préférence, le diamètre D2 de l'ouverture délimitée par le siège 2 est égal ou très proche de la section (diamètre D5) du passage femelle du corps 9.When the pressure in this piloting chamber 7 reaches the determined threshold of opening pressure, the shutter 1 moves away from its seat 2 and opens a passage of gas between the first portion 11 of the shutter and the body 9. Preferably, the diameter D2 of the opening delimited by the seat 2 is equal to or very close to the section (diameter D5) of the female passage of the body 9.

Le faible jeu entre la première portion 11 de l'obturateur et le corps 9 assure un passage de gaz progressif et une ouverture progressive (cf. le trajet du gaz symbolisé par des flèches aux figure 3 et 4).The small clearance between the first portion 11 of the shutter and the body 9 ensures a progressive gas passage and a gradual opening (see the path of the gas symbolized by arrows to figure 3 and 4 ).

La montée de la pression à l'aval de l'obturateur 1 est d'autant plus progressive que l'obturateur 1 possède une inertie importante et que le laminage au niveau de l'ajustement se réalise selon une course importante le long de l'obturateur 1 (par exemple, la première portion a une longueur comprise entre 2 et 6mm).The rise in the pressure downstream of the shutter 1 is all the more progressive as the shutter 1 has a large inertia and that the rolling at the adjustment is carried out along a large stroke along the shutter 1 (for example, the first portion has a length of between 2 and 6mm).

L'obturateur 1 continue sa course à l'encontre du ressort 5 jusqu'à ce qu'une seconde portion 12 de l'obturateur arrive au niveau du passage du corps 9. Cette seconde portion 12 a une section plus réduite que la première portion et permet un passage de gaz plus massif (cf. figure 5). La section de passage entre le corps 9 et la seconde portion 12 (correspondant à un état du clapet ouvert) est choisie de sorte à ce que la perte de charge engendrée par le passage du gaz soit négligeable, typiquement cette section est au moins équivalente à la section de passage de la vanne 14 située en amont dans le circuit 12.The shutter 1 continues its stroke against the spring 5 until a second portion 12 of the shutter arrives at the passage of the body 9. This second portion 12 has a smaller section than the first portion and allows a more massive gas passage (cf. figure 5 ). The section of passage between the body 9 and the second portion 12 (corresponding to a state of the open valve) is chosen so that the pressure drop generated by the passage of the gas is negligible, typically this section is at least equivalent to the passage section of the the valve 14 located upstream in the circuit 12.

Une telle architecture présente des avantages par rapport à l'art antérieur. En effet, le dispositif permet de maintenir un débit et une pression de sortie jusqu'au seuil de tarage du dispositif de clapet de pression résiduelle sans créer de perte de charge parasite comme c'est le cas dans les clapets à pression résiduelle (« RPV ») classiques.Such an architecture has advantages over the prior art. In fact, the device makes it possible to maintain a flow rate and an outlet pressure up to the calibration threshold of the residual pressure valve device without creating a parasitic pressure drop, as is the case in the residual pressure valves ("RPV" ") Classics.

Le dispositif ne limite en effet pas le soutirage du gaz de la bouteille au-delà de sa pression de tarage.The device does not limit the withdrawal of gas from the bottle beyond its calibration pressure.

De plus, ce dispositif présente une architecture qui n'emprisonne pas de gaz sous pression dans son mécanisme pouvant causer des détériorations ou obligeant à utiliser des étanchéités particulières (via des plastomères par exemple). En effet, la structure du dispositif évite le piégeage de gaz à haute pression en aval du clapet de pression résiduelle comme c'est classiquement le cas selon l'art antérieur. En effet, lorsque du gaz sous pression est piégé dans le clapet, ceci engendre des efforts importants, notamment au niveau de l'étanchéité au niveau du siège. Ceci peut conduire à une destruction de l'étanchéité.In addition, this device has an architecture that does not trap gas under pressure in its mechanism that can cause damage or requiring the use of special seals (via plastomers for example). Indeed, the structure of the device avoids the trapping of high pressure gas downstream of the residual pressure valve as is conventionally the case according to the prior art. Indeed, when pressurized gas is trapped in the valve, this generates significant efforts, particularly in terms of sealing at the seat. This can lead to a destruction of the seal.

Du fait des faibles efforts générés au niveau de l'étanchéité entre l'obturateur 1 et le siège 2, la géométrie du dispositif permet d'utiliser des élastomères (typiquement des joints toriques 17, 27) permettant ainsi d'obtenir très bons niveaux d'étanchéités contrairement aux étanchéités avec du plastique (tels que par exemple du PEEK®, du TORLON®, ou du TEFLON®).Because of the low forces generated at the level of the seal between the shutter 1 and the seat 2, the geometry of the device makes it possible to use elastomers (typically O-rings 17, 27) thus making it possible to obtain very good levels of pressure. seals unlike seals with plastic (such as for example PEEK®, TORLON®, or TEFLON®).

Le dispositif intègre à la fois une fonction de retenue d'une pression résiduelle et un dispositif d'ouverture progressive réduisant ou éliminant les chocs tels que les « coups de bélier ».The device incorporates both a residual pressure holding function and a progressive opening device reducing or eliminating shocks such as "water hammer".

En effet, le dispositif permet d'absorber les montées de pression brusques dues à une ouverture rapide d'une vanne 14 d'isolement amont.Indeed, the device can absorb sudden pressure rises due to rapid opening of an upstream isolation valve 14.

Dans un exemple de réalisation non limitatif, l'extrémité amont de l'obturateur 1 a un diamètre D1 compris par exemple entre 4 et 5mm, par exemple 4,3mm. Le diamètre D2 du siège est égal par exemple à 4,3mm tout comme le diamètre D3 de l'extrémité inférieure de l'obturateur 1. Le diamètre D4 de la première portion 11 de l'obturateur 1 est égal par exemple à 4,3mm. Le diamètre D5 de l'alésage formant le passage pour l'obturateur 1 est quant à lui déterminé par rapport au diamètre de la première portion 11 selon l'ajustement voulu (par exemple H8, f7. Le diamètre D6 de l'orifice calibré est par exemple égal à 0,1 mm et la force du ressort 5 de rappel est par exemple de 30Newtons.In an exemplary non-limiting embodiment, the upstream end of the shutter 1 has a diameter D1 for example between 4 and 5mm, for example 4.3mm. The diameter D2 of the seat is equal for example to 4.3 mm as the diameter D3 of the lower end of the shutter 1. The diameter D4 of the first portion 11 of the shutter 1 is equal for example to 4.3mm. The diameter D5 of the bore forming the passage for the shutter 1 is itself determined with respect to the diameter of the first portion 11 according to the desired adjustment (for example H8, f7) The diameter D6 of the calibrated orifice is for example equal to 0.1 mm and the force of the return spring 5 is for example 30Newtons.

Pour cet exemple non limitatif, dans le cas d'une pression de gaz au niveau de l'entrée 3 égale à 800bar, l'ouverture du passage est obtenue lorsque la pression dans la chambre 7 de pilotage atteint 90bar environ. Pour une pression en entrée de 25bar, l'ouverture du clapet a lieu lorsque la pression dans la chambre 7 de pilotage atteint environ 22bar. Le l'obturateur 1 referme à nouveau le passage en s'appuyant sur le siège 2 en fin de soutirage, à une pression en entrée de 21 bar environ.For this non-limiting example, in the case of a gas pressure at the inlet 3 equal to 800bar, the opening of the passage is obtained when the pressure in the control chamber 7 reaches about 90 bar. For an inlet pressure of 25bar, the opening of the valve takes place when the pressure in the pilot chamber 7 reaches about 22bar. The shutter 1 closes the passage again by leaning on the seat 2 at the end of withdrawal, at an inlet pressure of about 21 bar.

Claims (10)

  1. Residual pressure selector valve device comprising a body (9), a closure member (1) movable in the body (9) relative to a seat (2) for selectively allowing or interrupting a gas flow between a fluid inlet (3) and a fluid outlet (4), a return member (5) actuating by default the closure member (1) towards the seat (2) towards the flow interruption position thereof, the closure member (1) comprising an internal channel (6) having a first end communicating with the gas inlet (3) and a second end opening, via a calibrated orifice (8), into a control chamber (7), the control chamber (7) being resealed tightly by a downstream end of the closure member (1) such that, when the gas pressure in the control chamber (7) reaches a predetermined threshold, this pressure induces a movement strain of the closure member (1) opposing the strain of the return member (5), to separate the closure member (1) from the seat (2) and as such allow a gas flow between the fluid inlet (3) and outlet (4), the body of the closure member (1) comprising, between the seat (2) and the downstream end of the closure member (1), a first portion (11) forming a male element movable in translation in a female passage of the body (9) with a predetermined fit forming a restriction providing a partial and progressive opening of the passage for the gas between the inlet (3) and the outlet (4).
  2. Device according to claim 1, characterised in that, between the first portion (11) and the downstream end of the closure member (1), the body of the closure member (1) comprises a second portion (12) of reduced cross-section relative to the cross-section of the first portion (11), to form a passage defining an enlarged opening for the gas between the inlet (3) and the outlet (4).
  3. Device according to claim 1 or 2, characterised in that the dimensions (D2) of the opening defined by the seat (2) differ by not more than 30% relative to the dimensions (D4) of the cross-section of the first (11) portion of the closure member (1).
  4. Device according to claim 3, characterised in that the opening defined by the seat (2) is circular and has a diameter (D2) between three and six millimetres and differs by not more than 1 mm relative to the diameter (D4) of the first (11) portion of the closure member (1) which is cylindrical.
  5. Device according to any one of claims 1 to 4, characterised in that the first portion (11) is cylindrical of predetermined diameter (D4) and the female passage of the body (9) is a cylindrical bore of predetermined diameter (D5) so as to form a usual or precise clearance between the closure member (1) and the female passage of the body (9), for example an H8 f7 type clearance according to the ISO fit standard.
  6. Device according to claims 2 and 5, characterised in that the closure member is movable in translation in the body along an upstream/downstream direction, the first portion (11) has a length along the upstream/downstream direction between two and eight millimetres and preferably between three and four millimetres.
  7. Device according to any one of claims 1 to 6, characterised in that the calibrated orifice (8) has a diameter between 0.01 mm and 0.50 mm and preferably between 0.10 mm and 0.30 mm in order to regulate the pressure rise rate in the control chamber (7), this pressure rise rate being further dependent on the gas pressure at the inlet (3) and the volume of said control chamber (7).
  8. Device according to claims 3 and 6, characterised in that the opening defined by the seat (2) is circular and has a diameter of 4.3 mm, the first portion (11) is cylindrical and has a diameter (D4) of 4.3 mm, the female passage of the body (9) is a cylindrical bore of a length between 3 and 4 mm and a predetermined diameter (D5) to form with the first portion (11) an H8 f7 type fit, the calibrated orifice (8) having a diameter between 0.08 mm and 0.12 mm and the return member (5) being a spring applying on the closure member a force between 20 and 100 Newton.
  9. Pressurised gas cylinder valve, comprising an extraction circuit (12) having an upstream end (112) intended to be connected to a volume for storing a pressurised gas cylinder (13) and a downstream end (212) intended to be connected to an apparatus using gas extracted from the cylinder (13), the extraction circuit (12) comprising, arranged serially upstream between the upstream end and the downstream end, a shut-off selector valve (14) and a residual pressure selector valve device (100) characterised in that the residual pressure selector valve device (100) is according to any one of claims 1 to 8.
  10. Pressurised gas cylinder, characterised in that it comprises a valve according to claim 9.
EP13782772.1A 2012-10-02 2013-10-01 Residual pressure valve device, valve and cylinder having such a device Active EP2904306B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1259299A FR2996278B1 (en) 2012-10-02 2012-10-02 DEVICE FOR A RESIDUAL PRESSURE VALVE, TAP AND BOTTLE COMPRISING SUCH A DEVICE
PCT/FR2013/052334 WO2014053764A1 (en) 2012-10-02 2013-10-01 Residual pressure valve device, valve and cylinder having such a device

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EP2904306A1 EP2904306A1 (en) 2015-08-12
EP2904306B1 true EP2904306B1 (en) 2016-11-30

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US (1) US9677715B2 (en)
EP (1) EP2904306B1 (en)
JP (1) JP6254171B2 (en)
KR (1) KR20150063398A (en)
CN (1) CN104685288B (en)
CA (1) CA2884804A1 (en)
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FR3030740B1 (en) * 2014-12-18 2016-12-30 Coutier Moulage Gen Ind PRESSURE MEASURING DEVICE AND BRAKE SYSTEM COMPRISING SUCH A PRESSURE MEASURING DEVICE
FR3033386B1 (en) 2015-03-04 2017-10-27 Air Liquide TAP, CONTAINER AND METHODS OF FILLING, STRAINING AND VACUUMING
FR3093781B1 (en) * 2019-03-12 2021-02-12 Air Liquide Valve, pressurized fluid container and methods of filling and withdrawing.

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CN104685288B (en) 2016-09-07
FR2996278B1 (en) 2014-10-31
JP6254171B2 (en) 2017-12-27
CN104685288A (en) 2015-06-03
WO2014053764A1 (en) 2014-04-10
US9677715B2 (en) 2017-06-13
JP2015532401A (en) 2015-11-09
US20150276132A1 (en) 2015-10-01
CA2884804A1 (en) 2014-04-10
FR2996278A1 (en) 2014-04-04
EP2904306A1 (en) 2015-08-12
KR20150063398A (en) 2015-06-09

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