FR2942019A1 - Safety device for protecting compressed gas tank of vehicle during fire, has rupture unit comprising end placed against support element, where periphery of element has claw shaped elastic arms hooked in wall of ventilation chamber - Google Patents

Safety device for protecting compressed gas tank of vehicle during fire, has rupture unit comprising end placed against support element, where periphery of element has claw shaped elastic arms hooked in wall of ventilation chamber Download PDF

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Publication number
FR2942019A1
FR2942019A1 FR1050911A FR1050911A FR2942019A1 FR 2942019 A1 FR2942019 A1 FR 2942019A1 FR 1050911 A FR1050911 A FR 1050911A FR 1050911 A FR1050911 A FR 1050911A FR 2942019 A1 FR2942019 A1 FR 2942019A1
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FR
France
Prior art keywords
safety device
ventilation chamber
rupture
ventilation
support element
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.)
Withdrawn
Application number
FR1050911A
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French (fr)
Inventor
Bruno Hezel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2942019A1 publication Critical patent/FR2942019A1/en
Withdrawn legal-status Critical Current

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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
    • F17C13/06—Closures, e.g. cap, breakable member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
    • F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
    • 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
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • 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
    • F17C2205/0311—Closure means
    • F17C2205/0314—Closure means breakable, e.g. with burst discs
    • 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
    • F17C2205/0311—Closure means
    • F17C2205/0317—Closure means fusing or melting
    • 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
    • F17C2205/0332—Safety valves or pressure relief 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
    • F17C2205/0382—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
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/021—Avoiding over pressurising
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/023—Avoiding overheating
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Closures For Containers (AREA)

Abstract

The device (1) has a thermal trigger installation (2) including a closure unit (3) installed in a ventilation duct (4), where the closure unit is in the form of a cap. The closure unit is supported against a rupture unit (8) that is in the form of a hollow glass bulb and placed in a ventilation chamber (9). The rupture unit has an end placed against a support element (10) e.g. elastic disk or plate, in the ventilation chamber. Periphery of the support element comprises claw shaped elastic arms (12) that are hooked in a wall of the ventilation chamber.

Description

1 Domaine de l'invention La présente invention concerne un dispositif de sécurité pour un réservoir de gaz comprimé comportant une installation de déclenchement thermique munie d'un organe d'obturation installé dans un canal de ventilation, cet organe s'appuyant contre un organe de rupture placé dans une chambre de ventilation, l'extrémité de l'organe de rupture à l'opposé de l'organe de fermeture étant appliquée contre un élément d'appui dans la chambre de ventilation, le canal de ventilation débouchant dans la chambre de ventilation reliée à l'atmosphère. Etat de la technique On connaît déjà des dispositifs de sécurité de réservoirs à gaz sous pression selon le document DE 199 11 530 C2. Un tel dispositif est équipé d'une installation de déclenchement thermique comportant un organe d'obturation installé dans un canal de ventilation. Cet organe est lui-même appuyé contre un organe de rupture placé dans une chambre de ventilation ; l'extrémité de l'organe de rupture non tournée vers l'organe d'obturation, est logée dans un élément de support prévu dans la chambre de ventilation ; le canal de ventilation débouche lui-même dans la chambre de ventilation reliée à l'atmosphère. L'organe de rupture est un corps creux en verre rempli de liquide ; le liquide présente un coefficient de dilatation thermique élevé et pour des températures ambiantes déterminées, l'organe de rupture éclate et libère ainsi une ouverture de ventilation de la chambre de ventilation de sorte que le réservoir à gaz sous pression, pourra être vidé en toute sécurité si le véhicule brûle. L'élément d'appui est vissé dans la chambre de ventilation. L'organe de rupture est toutefois très sensible vis-à-vis des efforts mécaniques qui peuvent être appliqués par exemple lorsqu'on visse l'élément d'appui, en cas de décalage important, non acceptable entre l'axe de l'organe de rupture et celui de l'organe d'obturation ou si les tolérances ne sont pas respectées ou encore sous l'effet de dilations thermiques différentes ou encore sous l'effet de vibrations. Cette très grande sensibilité mécanique rend le montage de l'organe de rupture très difficile et coûteux. FIELD OF THE INVENTION The present invention relates to a safety device for a compressed gas reservoir comprising a thermal tripping device provided with a shutter member installed in a ventilation channel, this device resting against a device of rupture placed in a ventilation chamber, the end of the rupture member opposite the closing member being applied against a support element in the ventilation chamber, the ventilation channel opening into the chamber of ventilation ventilation related to the atmosphere. State of the art Safety devices for pressurized gas tanks are already known from DE 199 11 530 C2. Such a device is equipped with a thermal tripping device comprising a shutter member installed in a ventilation channel. This body is itself supported against a rupture member placed in a ventilation chamber; the end of the rupture member not facing the closure member is housed in a support member provided in the ventilation chamber; the ventilation channel opens itself into the ventilation chamber connected to the atmosphere. The rupture member is a glass hollow body filled with liquid; the liquid has a high coefficient of thermal expansion and for specified ambient temperatures, the rupture member bursts and thus releases a ventilation opening of the ventilation chamber so that the pressurized gas tank can be emptied safely if the vehicle burns. The support element is screwed into the ventilation chamber. The rupture member is however very sensitive vis-à-vis the mechanical forces that can be applied for example when screwing the support element, in case of significant shift, not acceptable between the axis of the organ rupture and that of the closure member or if the tolerances are not respected or under the effect of different thermal expansion or under the effect of vibration. This very high mechanical sensitivity makes the assembly of the rupture member very difficult and expensive.

2 Exposé et avantages de l'invention L'invention concerne un dispositif de sécurité de réservoir à gaz comprimé, du type défini ci-dessus caractérisé en ce que, la périphérie de l'élément d'appui comporte des bras élastiques en forme de griffes, accrochés dans la paroi de la chambre de ventilation. Le dispositif de sécurité selon l'invention a l'avantage que l'organe de rupture soit installé pour très bien compenser tout décalage des axes, ou aussi des dilatations thermiques différentes ou des tolérances de pièces. Il est également amorti vis-à-vis des vibrations. The invention relates to a compressed gas tank safety device, of the type defined above, characterized in that the periphery of the support element comprises resilient arms in the form of claws. , hung in the wall of the ventilation chamber. The safety device according to the invention has the advantage that the rupture member is installed to very well compensate for any offset of the axes, or also different thermal expansions or room tolerances. It is also damped vis-à-vis the vibrations.

Ces avantages sont liés aux bras élastiques en forme de griffes à la périphérie de l'organe d'appui et qui sont accrochés ou ancrés dans la paroi de la chambre de ventilation. Selon l'invention, l'organe d'appui est bloqué de manière définitive dans la chambre de ventilation, ce qui évite toute modification non régulière du réglage ou toute manipulation du dispositif de sécurité. De plus, le montage de l'organe de rupture, est simplifié par rapport à celui de l'état de la technique. D'une manière particulièrement avantageuse, l'organe d'appui est un disque élastique ou plaquette élastique, muni d'un segment annulaire soutenant l'organe de rupture et ayant un passage central car, de cette manière, le point d'appui ou de palier de l'organe de rupture, est protégé contre les efforts exercés de l'extérieur. Il est en outre avantageux que le diamètre du passage central soit inférieur au diamètre de l'organe de rupture car, ainsi, l'organe de rupture est soutenu au bord du passage central. Le fond de l'organe de rupture pénètre dans le passage central. Il est très avantageux que le segment annulaire du disque élastique ou de la plaquette élastique, soit de forme conique, de calotte ou de forme bombée, car une telle forme permet de compenser le décalage entre l'axe de l'organe d'obturation et celui de l'organe d'appui, si bien que l'organe de rupture sera incliné par rapport à l'axe de l'organe de fermeture. La surface d'appui de l'organe de rupture est en outre agrandie, ce qui diminue l'effet des efforts appliqués. Il est en outre avantageux que les bras élastiques soient radialement en saillie du segment annulaire et que leur extrémité tournée vers la chambre de ventilation, soit coudée en direction de These advantages are linked to the resilient arms in the form of claws at the periphery of the support member and which are hooked or anchored in the wall of the ventilation chamber. According to the invention, the support member is permanently locked in the ventilation chamber, which avoids any non-regular adjustment of adjustment or any manipulation of the safety device. In addition, the assembly of the rupture member is simplified compared to that of the state of the art. In a particularly advantageous manner, the support member is an elastic disk or elastic plate, provided with an annular segment supporting the rupture member and having a central passage because, in this way, the point of support or bearing of the rupture member, is protected against the forces exerted from the outside. It is furthermore advantageous if the diameter of the central passage is smaller than the diameter of the rupture member since, thus, the rupture member is supported at the edge of the central passage. The bottom of the rupture member penetrates into the central passage. It is very advantageous that the annular segment of the elastic disk or of the elastic plate, be of conical shape, cap or curved shape, since such a shape makes it possible to compensate the offset between the axis of the closure member and that of the support member, so that the rupture member will be inclined relative to the axis of the closure member. The bearing surface of the rupture member is further enlarged, which reduces the effect of applied forces. It is furthermore advantageous that the elastic arms are radially projecting from the annular segment and that their end facing the ventilation chamber is bent in the direction of

3 l'organe de rupture. Cela permet de garantir des efforts axiaux très élevés que le disque élastique peut recevoir de manière fiable et en toute sécurité. Il est en outre avantageux que le disque élastique ou la plaquette élastique soit une pièce emboutie, transformée par exemple par emboutissage profond, car l'organe d'appui est ainsi réalisable d'une manière particulièrement simple et économique. Il est également avantageux que le segment annulaire comporte un segment cylindrique sur son côté arrière non tourné vers l'organe d'éclatement car, de cette manière, l'organe d'appui peut être pris par une installation de montage et être placé dans la chambre de ventilation. Suivant d'autres caractéristiques avantageuses : - l'organe d'obturation comporte une cavité pour recevoir une extrémité de l'organe de rupture, - le segment annulaire de l'élément d'appui comporte un segment cylindrique sur son côté non tourné vers l'organe de rupture, - la chambre de ventilation est élargie par rapport au canal de ventilation. 3 the rupture organ. This ensures very high axial forces that the elastic disc can receive reliably and safely. It is furthermore advantageous that the elastic disk or the elastic plate is a stamped part, transformed for example by deep drawing, because the support member is thus achievable in a particularly simple and economical manner. It is also advantageous that the annular segment has a cylindrical segment on its rear side not facing the bursting member because, in this way, the support member can be taken by a mounting installation and placed in the ventilation chamber. According to other advantageous features: the closure member comprises a cavity for receiving one end of the rupture member; the annular segment of the bearing element comprises a cylindrical segment on its non-facing side; breaking member, - the ventilation chamber is enlarged relative to the ventilation channel.

Dessins La présente invention sera décrite ci-après de manière plus détaillée à l'aide d'un exemple de réalisation représenté de façon simplifiée dans le dessin annexé qui est une vue en coupe d'un dispositif de sécurité selon l'invention pour un réservoir de gaz sous pression. Description du mode de réalisation Les réservoirs à gaz comprimé (ou gaz comprimé) doivent être conçus pour résister en toute sécurité aux contraintes auxquelles ils peuvent être soumis en cours de fonctionnement. De plus, la réglementation prévoit au moins un dispositif de sécurité qui évite qu'en cas d'incendie, on ne dépasse la pression, en permettant au contenu du réservoir à gaz sous pression, d'être éjecté à l'atmosphère. Le dispositif de sécurité 1 selon l'invention comprend une installation de déclenchement thermique 2 munie d'un organe d'obturation 3 qui ferme de manière étanche un canal de ventilation 4 Drawings The present invention will be described in more detail below with the aid of an exemplary embodiment shown schematically in the accompanying drawing which is a sectional view of a safety device according to the invention for a reservoir. of gas under pressure. DESCRIPTION OF THE EMBODIMENT The compressed gas (or compressed gas) tanks must be designed to safely withstand the stresses to which they may be subjected during operation. In addition, the regulation provides at least one safety device that prevents in case of fire, it exceeds the pressure, allowing the contents of the gas tank under pressure, to be ejected to the atmosphere. The safety device 1 according to the invention comprises a thermal tripping device 2 provided with a shutter member 3 which sealingly closes a ventilation channel 4

4 lorsqu'on est en dessous d'une température prédéfinie. Mais lorsqu'on atteint la température prédéfinie, l'organe d'obturation libère le canal, ce qui permet au gaz du réservoir à gaz sous pression 5, d'être éjecté par le canal de ventilation 4 jusqu'à l'atmosphère. 4 when below a preset temperature. But when the preset temperature is reached, the shutter member releases the channel, which allows the gas of the pressurized gas tank 5, to be ejected through the ventilation channel 4 to the atmosphere.

L'organe d'obturation 3 est installé dans le canal de ventilation 4 en forme de bouchon et il s'appuie contre l'organe de rupture 8 ; ce dernier est prévu dans une chambre de ventilation 9 à l'extrémité du canal de ventilation 4 ; son extrémité non tournée vers l'organe d'obturation 3 est soutenue par un organe d'appui 10 dans la chambre de ventilation 9 et elle est ainsi installée. L'organe de rupture ou d'éclatement 8 est un corps creux rempli d'un liquide. Sous l'effet de la dilatation du liquide lorsqu'on atteint une température définie, l'ampoule se casse. Par exemple, l'organe de rupture est réalisé sous la forme d'une ampoule en verre. La chambre de ventilation 9 est en outre reliée à l'atmosphère par au moins un orifice de ventilation 11. Lorsque l'organe de rupture 8 ayant atteint sa température prédéfinie, se casse, l'organe d'obturation 3 est déplacé dans la chambre de ventilation 9 par la pression du réservoir à gaz comprimé 5 ; ainsi, le réservoir à gaz comprimé 5 est relié par l'intermédiaire du canal de ventilation 4 et la chambre de ventilation 9 et au moins l'un des orifices de ventilation 11, jusqu'à l'atmosphère. La chambre de ventilation 9 est par exemple élargie par rapport au canal de ventilation 4 de sorte que le gaz de la chambre de ventilation 9 peut passer sur l'organe d'obturation 3. The shutter member 3 is installed in the vent duct 4 in the form of a plug and it bears against the rupture member 8; the latter is provided in a ventilation chamber 9 at the end of the ventilation channel 4; its end not facing the closure member 3 is supported by a support member 10 in the ventilation chamber 9 and is thus installed. The rupture or bursting member 8 is a hollow body filled with a liquid. Under the effect of dilatation of the liquid when reaching a defined temperature, the bulb breaks. For example, the rupture member is made in the form of a glass bulb. The ventilation chamber 9 is also connected to the atmosphere by at least one ventilation orifice 11. When the rupture member 8 having reached its predetermined temperature, breaks, the closure member 3 is moved into the chamber ventilation 9 by the pressure of the compressed gas reservoir 5; thus, the compressed gas reservoir 5 is connected via the ventilation channel 4 and the ventilation chamber 9 and at least one of the ventilation holes 11 to the atmosphere. The ventilation chamber 9 is for example widened with respect to the ventilation channel 4 so that the gas of the ventilation chamber 9 can pass on the closure member 3.

Selon l'invention, la périphérie de l'organe d'appui 10 comporte des bras élastiques 12 en forme de griffes s'accrochant dans ou contre la paroi de la chambre de ventilation 9. L'accrochage s'obtient lorsqu'on enfonce l'organe d'appui 10 dans la chambre de ventilation 9 ; les bras élastiques 12 peuvent alors pénétrer au moins en partie dans la matière de la paroi de la chambre de ventilation 9. L'organe d'appui 10 est enfoncé d'une certaine longueur dans la chambre de ventilation 9 pour avoir une certaine tension prédéfinie de l'organe de rupture 8 entre l'organe d'obturation 3 et l'organe d'appui 10. Selon l'exemple de réalisation, l'organe d'appui 10 est un disque ou une plaquette élastique dont le segment annulaire 10.1 qui s'appuie contre l'organe de rupture 8, est muni d'un passage central 10.2. La rondelle élastique est par exemple fabriquée en acier à ressort. Le diamètre du passage central 10.2 est inférieur au diamètre de l'organe de rupture 8 de sorte que ce dernier s'appuie contre le bord du 5 passage central 10.2 et son fond 8.1 peut pénétrer ou sortir du passage central 10.2. Le segment annulaire 10.1 de l'organe d'appui 10 a, par exemple, une forme conique, une forme de calotte ou une forme bombée. L'organe d'obturation 3 a un axe de palier 3.3 et l'organe d'appui 10 un axe de palier 10.4. L'organe de rupture 8 est monté entre l'organe d'obturation 3 et l'organe d'appui 10 de façon à pouvoir compenser tout décalage des axes de palier 3.3, 10.4. Pour un tel décalage des axes de palier, l'organe de rupture 8 s'aligne de façon que son axe 8.2 n'est pas aligné sur les axes de palier 3.3, 10.4 et se trouve ainsi incliné. Partant du segment annulaire 10.1, les bras élastiques 12 sont dirigés vers l'extérieur jusqu'au niveau de la paroi de la chambre de ventilation 9. A titre d'exemple, les bras élastiques 12 sont coudés dans la direction opposée à celle de l'organe de rupture 8 au niveau de leur extrémité tournée vers la chambre de ventilation 9. According to the invention, the periphery of the support member 10 comprises resilient arms 12 in the form of claws clinging in or against the wall of the ventilation chamber 9. The hooking is obtained when pressing the l support member 10 in the ventilation chamber 9; the resilient arms 12 can then penetrate at least partially into the material of the wall of the ventilation chamber 9. The support member 10 is depressed by a certain length in the ventilation chamber 9 to have a certain predefined tension of the rupture member 8 between the closure member 3 and the support member 10. According to the exemplary embodiment, the support member 10 is a disk or an elastic plate including the annular segment 10.1 which bears against the rupture member 8, is provided with a central passage 10.2. The spring washer is for example made of spring steel. The diameter of the central passage 10.2 is smaller than the diameter of the rupture member 8 so that the latter rests against the edge of the central passage 10.2 and its bottom 8.1 can enter or leave the central passage 10.2. The annular segment 10.1 of the support member 10 has, for example, a conical shape, a cap shape or a curved shape. The shutter member 3 has a bearing axis 3.3 and the bearing member 10 a bearing axis 10.4. The rupture member 8 is mounted between the closure member 3 and the support member 10 so as to compensate for any offset of the bearing pins 3.3, 10.4. For such an offset of the bearing axes, the rupture member 8 aligns so that its axis 8.2 is not aligned with the bearing pins 3.3, 10.4 and is thus inclined. Starting from the annular segment 10.1, the elastic arms 12 are directed outwards to the level of the wall of the ventilation chamber 9. By way of example, the elastic arms 12 are bent in the direction opposite to that of the breaking member 8 at their end facing the ventilation chamber 9.

Selon l'exemple de réalisation, le disque élastique est une pièce par exemple emboutie par emboutissage profond. Cette pièce n'est pas formée. Le segment annulaire 10.1 présente sur son dos non tourné vers l'organe de rupture 8, un segment axial cylindrique 10.3 par exemple obtenu par emboutissage profond et avec lequel coopère l'installation de montage pour enfoncer de force l'organe d'appui 10 dans la chambre de ventilation 9. L'organe d'obturation 3 est, par exemple, réalisé en une matière thermoplastique mais il peut également être réalisé si besoin avec d'autres matériaux. According to the exemplary embodiment, the elastic disc is a piece for example stamped by deep drawing. This piece is not formed. The annular segment 10.1 has on its back not facing the rupture member 8, a cylindrical axial segment 10.3 for example obtained by deep drawing and with which the mounting installation cooperates to force the support member 10 into force in the ventilation chamber 9. The closure member 3 is, for example, made of a thermoplastic material but it can also be made if necessary with other materials.

L'organe d'obturation 3 comporte une cavité 16 recevant l'extrémité de l'organe de rupture 8 tournée vers l'organe d'obturation 3. La cavité 16 est réalisée pour que l'organe de rupture 8 puisse se placer en biais par rapport à l'axe de palier 3.3 de l'organe de fermeture 3. Selon le mode de réalisation, la cavité 16 rétrécit par palier ; le palier comporte un congé 17 qui s'appuie contre l'organe de rupture 8. The closure member 3 comprises a cavity 16 receiving the end of the rupture member 8 facing the closure member 3. The cavity 16 is formed so that the rupture member 8 can be placed at an angle relative to the bearing axis 3.3 of the closing member 3. According to the embodiment, the cavity 16 narrows stepwise; the bearing comprises a fillet 17 which bears against the rupture member 8.

6 L'organe de rupture 8 pénètre par exemple avec la pointe 8.3 de son ampoule dans la cavité 16, ce qui laisse un intervalle 23 entre la cavité 16 et la pointe 8.3 de l'ampoule, pour que l'organe de rupture 8, puisse s'aligner de façon appropriée dans la cavité 16. The rupture member 8 penetrates for example with the tip 8.3 of its bulb into the cavity 16, leaving an interval 23 between the cavity 16 and the tip 8.3 of the ampoule, so that the rupture member 8, may align appropriately in the cavity 16.

L'organe d'obturation 3 comporte au moins un élément d'étanchéité 20 rendant étanche l'intervalle entre l'organe d'obturation 3 et le canal de ventilation 4. Au moins cet élément d'étanchéité 20 est par exemple un joint à ondulations radiales. La forte pression dans la conduite de ventilation 4, soutient l'élément d'appui 20 contre une bague d'appui 21. L'organe d'obturation 3 comporte un épaulement 22 reliant le segment 3.1 de grand diamètre au segment 3.2 de plus petit diamètre. L'élément d'étanchéité 20 et la bague d'appui 21, sont prévus sur le segment de diamètre plus réduit 3.2 de l'organe d'obturation 3. 20 NOMENCLATURE The closure member 3 comprises at least one sealing member 20 sealing the gap between the closure member 3 and the ventilation channel 4. At least this sealing element 20 is for example a seal at radial ripples. The high pressure in the ventilation duct 4, supports the support element 20 against a bearing ring 21. The closure member 3 comprises a shoulder 22 connecting the large diameter segment 3.1 to the segment 3.2 of smaller diameter. The sealing element 20 and the support ring 21 are provided on the segment of smaller diameter 3.2 of the closure member 3. NOMENCLATURE

1 dispositif de sécurité 2 installation de déclenchement thermique 3 organe d'obturation 3.1 segment 3.2 segment 3.3 axe de palier 4 canal de ventilation 5 réservoir à gaz comprimé 8 organe de rupture 8.1 fond 8.2 axe 8.3 pointe de l'ampoule 9 chambre de ventilation 10 organe d'appui 10.1 segment annulaire 10.2 passage 10.3 segment cylindrique 10.4 axe de palier 11 orifice de ventilation 12 bras élastique 16 cavité 17 congé 20 élément d'étanchéité 21 bague d'appui 22 épaulement 23 intervalle 35 1 safety device 2 thermal tripping device 3 shut-off device 3.1 segment 3.2 segment 3.3 bearing axis 4 ventilation channel 5 compressed gas tank 8 rupture element 8.1 bottom 8.2 axis 8.3 bulb tip 9 ventilation chamber 10 support member 10.1 annular segment 10.2 passage 10.3 cylindrical segment 10.4 bearing axis 11 ventilation opening 12 resilient arm 16 cavity 17 leave 20 sealing element 21 support ring 22 shoulder 23 gap 35

Claims (1)

REVENDICATIONS1 °) Dispositif de sécurité de réservoir de gaz comprimé (5) comportant une installation de déclenchement thermique (2) munie d'un organe d'obturation (3) installé dans un canal de ventilation (4), cet organe s'appuyant contre un organe de rupture (8) placé dans une chambre de ventilation (9), l'extrémité de l'organe de rupture à l'opposé de l'organe de fermeture (3) étant appliquée contre un élément d'appui (10) dans la chambre de ventilation (9), le canal de ventilation (4) débouchant dans la chambre de ventilation (9) reliée à l'atmosphère, caractérisé en ce que la périphérie de l'élément d'appui (10) comporte des bras élastiques (12) en forme de griffes, accrochés dans la paroi de la chambre de ventilation (9). 2°) Dispositif de sécurité selon la revendication 1, caractérisé en ce que l'élément d'appui (10) est un disque élastique muni d'un passage central (10.2) au niveau du segment annulaire (10.1) s'appuyant contre l'organe de rupture (8). 3°) Dispositif de sécurité selon la revendication 2, caractérisé en ce que le diamètre du passage central (10.2) est inférieur au diamètre de l'organe de rupture (8). 4°) Dispositif de sécurité selon la revendication 2, caractérisé en ce que le segment annulaire (10.1) de l'élément d'appui (10) est en forme de cône, en forme de calotte ou de forme bombée. 5°) Dispositif de sécurité selon la revendication 2, caractérisé en ce que les bras élastiques (12) sont dirigés radialement vers l'extérieur à partir du segment annulaire (10.1). 109 6°) Dispositif de sécurité selon la revendication 1, caractérisé en ce que l'extrémité des bras élastiques (12) tournée vers la chambre de ventilation (9), est coudée dans la direction opposée à celle de l'organe s de rupture (8). 7°) Dispositif de sécurité selon la revendication 2, caractérisé en ce que la rondelle élastique est une pièce emboutie, transformée. 8°) Dispositif de sécurité selon la revendication 2, caractérisé en ce que l'organe d'obturation (3) comporte une cavité (16) pour recevoir une extrémité de l'organe de rupture (8). 15 9°) Dispositif de sécurité selon la revendication 2, caractérisé en ce que le segment annulaire (10.1) de l'élément d'appui (10) comporte un segment cylindrique (10.3) sur son côté non tourné vers l'organe de 20 rupture (8). 10°) Dispositif de sécurité selon la revendication 1, caractérisé en ce que la chambre de ventilation (9) est élargie par rapport au canal de 25 ventilation (4). 30 CLAIMS1) Compressed gas tank safety device (5) comprising a thermal tripping device (2) provided with a closure member (3) installed in a ventilation channel (4), this body leaning against a rupture member (8) placed in a ventilation chamber (9), the end of the rupture member opposite the closing member (3) being applied against a support member (10) in the ventilation chamber (9), the ventilation duct (4) opening into the ventilation chamber (9) connected to the atmosphere, characterized in that the periphery of the support element (10) comprises arms resilient (12) claws, hooked into the wall of the ventilation chamber (9). 2) Safety device according to claim 1, characterized in that the support element (10) is an elastic disk provided with a central passage (10.2) at the annular segment (10.1) bearing against the breaking member (8). 3 °) safety device according to claim 2, characterized in that the diameter of the central passage (10.2) is smaller than the diameter of the rupture member (8). 4) Safety device according to claim 2, characterized in that the annular segment (10.1) of the support element (10) is cone-shaped, cap-shaped or curved shape. 5 °) safety device according to claim 2, characterized in that the resilient arms (12) are directed radially outwardly from the annular segment (10.1). 109 6 °) Safety device according to claim 1, characterized in that the end of the elastic arms (12) facing the ventilation chamber (9), is bent in the opposite direction to that of the rupture member (8). 7 °) safety device according to claim 2, characterized in that the spring washer is a stamped part, transformed. 8 °) safety device according to claim 2, characterized in that the closure member (3) comprises a cavity (16) for receiving an end of the rupture member (8). Security device according to Claim 2, characterized in that the annular segment (10.1) of the support element (10) has a cylindrical segment (10.3) on its side which is not turned towards the housing member. rupture (8). 10 °) Safety device according to claim 1, characterized in that the ventilation chamber (9) is enlarged relative to the ventilation channel (4). 30
FR1050911A 2009-02-12 2010-02-10 Safety device for protecting compressed gas tank of vehicle during fire, has rupture unit comprising end placed against support element, where periphery of element has claw shaped elastic arms hooked in wall of ventilation chamber Withdrawn FR2942019A1 (en)

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Publication number Priority date Publication date Assignee Title
US8800587B2 (en) 2011-08-05 2014-08-12 GM Global Technology Operations LLC Thermal pressure relief device
CA2964389A1 (en) * 2014-11-05 2016-05-12 Luxfer Canada Limited Thermal pressure relief device
DE102020119022A1 (en) 2020-07-17 2022-01-20 PTEC - Pressure Technology GmbH Thermally activated pressure relief device

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EP0903520A1 (en) * 1997-09-17 1999-03-24 VSH Fabrieken B.V. Thermal gas valve fitting
EP0960634A2 (en) * 1998-05-25 1999-12-01 Job Lizenz GmbH & Co. KG Temperature responsive safety device for pressure vessel
EP1748237A1 (en) * 2005-07-22 2007-01-31 Job Lizenz GmbH & Co. KG Safety valve for a pressure gas container
EP1918621A1 (en) * 2006-11-06 2008-05-07 Job Lizenz GmbH Safety valve for a pressure gas container

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DE19911530C2 (en) 1999-03-16 2001-05-17 Vti Ventil Technik Gmbh Safety device for a compressed gas container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903520A1 (en) * 1997-09-17 1999-03-24 VSH Fabrieken B.V. Thermal gas valve fitting
EP0960634A2 (en) * 1998-05-25 1999-12-01 Job Lizenz GmbH & Co. KG Temperature responsive safety device for pressure vessel
EP1748237A1 (en) * 2005-07-22 2007-01-31 Job Lizenz GmbH & Co. KG Safety valve for a pressure gas container
EP1918621A1 (en) * 2006-11-06 2008-05-07 Job Lizenz GmbH Safety valve for a pressure gas container

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