EP0743077A1 - High pressure safety for fire extinguisher - Google Patents

High pressure safety for fire extinguisher Download PDF

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Publication number
EP0743077A1
EP0743077A1 EP96401032A EP96401032A EP0743077A1 EP 0743077 A1 EP0743077 A1 EP 0743077A1 EP 96401032 A EP96401032 A EP 96401032A EP 96401032 A EP96401032 A EP 96401032A EP 0743077 A1 EP0743077 A1 EP 0743077A1
Authority
EP
European Patent Office
Prior art keywords
seal
head
high pressure
fire extinguisher
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96401032A
Other languages
German (de)
French (fr)
Other versions
EP0743077B1 (en
Inventor
Jacques Jalencas
Hervé Berault
Michel Fillot
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.)
Compagnie Centrale Sicli SA
Original Assignee
Compagnie Centrale Sicli SA
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
Application filed by Compagnie Centrale Sicli SA filed Critical Compagnie Centrale Sicli SA
Publication of EP0743077A1 publication Critical patent/EP0743077A1/en
Application granted granted Critical
Publication of EP0743077B1 publication Critical patent/EP0743077B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
    • A62C13/76—Details or accessories

Definitions

  • the invention relates to an anti-high pressure safety device for fire extinguishers.
  • Fire extinguishers comprise, in known manner, a reservoir containing the product to be sprayed, the opening of which is closed by a distribution head which supports a closed cartridge of gas under pressure.
  • a striker By the action of a striker on a sealing cap of an orifice of this cartridge, it is immediately put in communication with the reservoir by establishing a high pressure therein capable of driving the extinguishing agent towards a spraying cane connected to a feed-through well provided in the distribution head.
  • the latter also serves as a support for the triggering mechanisms of the striker, in particular the usual pressing lever and its pin or its control and safety ring.
  • the dispensing head which is a round piece coming from foundry or machining, is firmly fixed, for example by screwing, on the opening of the tank.
  • the seal is ensured by an annular seal housed in a peripheral groove formed in the head. When tightening, the seal is crushed against the circular rim of the tank opening.
  • the invention provides a simple and effective device which allows, when such an overpressure is thus established in the tank, to avoid the drawbacks indicated above because it will establish in said head a leak to the outside. , as soon as the overpressure has exceeded a predetermined threshold.
  • the invention therefore relates to an anti-high pressure safety device for a fire extinguisher, the dispensing head of which is tightly fixed to the reservoir containing the product to be sprayed, the seal being provided by a seal housed in a groove. annular of said head, the seal being intended to be crushed on a neck of the reservoir during the closing of the head, device according to which the edges of the annular groove in which the seal is positioned are each hollowed out by a notch and on the other side of the joint, one opposite the other.
  • Figure 1 a perspective view of a distribution head for fire extinguisher and Figure 2 the same view showing the seal in the deformed position.
  • Figure 1 shows a dispensing head 1 for fire extinguisher which forms the cover of the tank containing the product to be sprayed. Said head is crossed by a well 2 communicating the interior of the tank with a gas cartridge under pressure not shown.
  • the various mechanisms are also fixed above the head, in particular the presser lever and its control ring, the striker, etc.
  • the peripheral part of the dispensing head is usually hollowed out with an annular groove 3 serving as a housing for a seal 4.
  • annular groove 3 serving as a housing for a seal 4.
  • the inner 5 and outer 6 edges of the annular groove 3 are hollowed out respectively with an internal notch 7 and an external notch 8 located one opposite the other.
  • This device therefore eliminates any immediate and progressive risk linked to an internal overpressure in the tank, and this in an extremely simple and effective manner.
  • the internal notch 7 can be of dimension smaller than that of the external notch 8 which must be able to allow the displacement of the joint towards the outside, the dimensions being defined according to each type of extinguisher.

Abstract

The extinguisher distributor head is attached to the open upper end of the reservoir containing the extinguishing product, with a gasket (4) engaging in an annular groove (3) to ensure a complete seal. The inner (5) and outer (6) edges of the groove each include a cut-out portion (7,8) at one side. The cut-out in the inner edge wall of the groove is smaller than that in the outer wall. Different sizes of cut-out are employed for different sizes and capacities of extinguisher.

Description

L'invention porte sur un dispositif de sécurité anti haute-pression destiné aux extincteurs d'incendie.The invention relates to an anti-high pressure safety device for fire extinguishers.

Les extincteurs d'incendie comportent de façon connue un réservoir contenant le produit à pulvériser, dont l'ouverture est obturée par une tête de distribution qui supporte une cartouche fermée de gaz sous pression. Par action d'un percuteur sur un opercule de bouchage d'un orifice de cette cartouche, celle-ci est mise immédiatement en communication avec le réservoir en y établissant une forte pression apte à chasser l'agent extincteur vers une canne pulvérisatrice raccordée à un puits de traversée prévu dans la tête de distribution. Cette dernière sert aussi de support aux mécanismes de déclenchement du percuteur notamment le levier presseur habituel et sa goupille ou son anneau de commande et de sécurité. La tête de distribution qui est une pièce ronde venant de fonderie ou d'usinage, est solidement fixée, par exemple par vissage, sur l'ouverture du réservoir. L'étanchéité est assurée par un joint annulaire logé dans une gorge périphérique ménagée dans la tête. Lors du serrage, le joint est écrasé contre le rebord circulaire de l'ouverture du réservoir.Fire extinguishers comprise, in known manner, a reservoir containing the product to be sprayed, the opening of which is closed by a distribution head which supports a closed cartridge of gas under pressure. By the action of a striker on a sealing cap of an orifice of this cartridge, it is immediately put in communication with the reservoir by establishing a high pressure therein capable of driving the extinguishing agent towards a spraying cane connected to a feed-through well provided in the distribution head. The latter also serves as a support for the triggering mechanisms of the striker, in particular the usual pressing lever and its pin or its control and safety ring. The dispensing head which is a round piece coming from foundry or machining, is firmly fixed, for example by screwing, on the opening of the tank. The seal is ensured by an annular seal housed in a peripheral groove formed in the head. When tightening, the seal is crushed against the circular rim of the tank opening.

Lors du déclenchement du levier presseur, l'action du percuteur sur la cartouche de gaz provoque donc dans le réservoir l'arrivée d'une pression nécessaire et suffisante pour refouler l'agent extincteur vers la canne pulvérisatrice. Cette pression s'établit ainsi dans un petit volume libre du réservoir entre le niveau supérieur du fluide et la tête de distribution.When the presser lever is triggered, the action of the striker on the gas cartridge therefore causes the reservoir to arrive with the necessary and sufficient pressure to drive the extinguishing agent towards the sprayer cane. This pressure is thus established in a small free volume of the reservoir between the upper level of the fluid and the dispensing head.

Mais si par exemple, le remplissage du réservoir est trop important et qu'en conséquence le volume libre recevant la pression de la cartouche est très inférieur au volume normal prévu, il va s'y établir, au moment de la percussion, une surpression très importante qui va rendre hasardeuse la manoeuvre de pulvérisation du produit et qui peut même provoquer la détérioration et l'éclatement de la tête de distribution.But if for example, the filling of the tank is too large and that consequently the free volume receiving the pressure of the cartridge is much lower than the normal volume expected, it will be established there, at the time of the percussion, a very overpressure important which will make the spraying operation of the product hazardous and which may even cause deterioration and bursting of the dispensing head.

L'invention propose un dispositif simple et efficace qui permet, quand une telle surpression s'établit ainsi dans le réservoir, d'éviter les inconvénients indiqués plus haut du fait qu'il va s'établir dans ladite tête une fuite vers l'extérieur, dès que la surpression a dépassé un seuil prédéterminé.The invention provides a simple and effective device which allows, when such an overpressure is thus established in the tank, to avoid the drawbacks indicated above because it will establish in said head a leak to the outside. , as soon as the overpressure has exceeded a predetermined threshold.

L'invention a donc pour objet un dispositif de sécurité anti haute-pression pour extincteur d'incendie dont la tête de distribution est fixée de façon étanche au réservoir contenant le produit à pulvériser, l'étanchéité étant assurée par un joint logé dans une gorge annulaire de ladite tête, le joint étant destiné à s'écraser sur un collet du réservoir lors de la fermeture de la tête, dispositif selon lequel les bordures de la gorge annulaire dans laquelle est positionné le joint sont chacune creusées d'une échancrure de part et d'autre du joint, l'une en face de l'autre.The invention therefore relates to an anti-high pressure safety device for a fire extinguisher, the dispensing head of which is tightly fixed to the reservoir containing the product to be sprayed, the seal being provided by a seal housed in a groove. annular of said head, the seal being intended to be crushed on a neck of the reservoir during the closing of the head, device according to which the edges of the annular groove in which the seal is positioned are each hollowed out by a notch and on the other side of the joint, one opposite the other.

Les caractéristiques particulières et avantages de l'invention apparaîtront à la lecture de la description qui va suivre d'un exemple de réalisation dans lequel on fait référence aux dessins annexés qui représentent :The particular characteristics and advantages of the invention will appear on reading the description which follows of an embodiment in which reference is made to the appended drawings which represent:

Figure 1 une vue en perspective d'une tête de distribution pour extincteur d'incendie et figure 2 la même vue montrant le joint en position déformée.Figure 1 a perspective view of a distribution head for fire extinguisher and Figure 2 the same view showing the seal in the deformed position.

La figure 1 montre une tête de distribution 1 pour extincteur d'incendie qui forme le couvercle du réservoir contenant le produit à pulvériser. Ladite tête est traversée par un puits 2 mettant en communication l'intérieur du réservoir avec une cartouche de gaz sous pression non représentée. Au-dessus de la tête sont également fixés les divers mécanismes, notamment le levier presseur et son anneau de commande, le percuteur etc...Figure 1 shows a dispensing head 1 for fire extinguisher which forms the cover of the tank containing the product to be sprayed. Said head is crossed by a well 2 communicating the interior of the tank with a gas cartridge under pressure not shown. The various mechanisms are also fixed above the head, in particular the presser lever and its control ring, the striker, etc.

Pour assurer l'étanchéité entre la tête et le réservoir, la partie périphérique de la tête de distribution est habituellement creusée d'une gorge annulaire 3 servant de logement à un joint 4. Quant la tête est fixée en place et ferme le réservoir, le joint 4 s'écrase contre le collet supérieur du réservoir assurant l'étanchéité.To ensure sealing between the head and the reservoir, the peripheral part of the dispensing head is usually hollowed out with an annular groove 3 serving as a housing for a seal 4. When the head is fixed in place and closes the reservoir, the seal 4 crashes against the collar upper part of the tank ensuring sealing.

Dans l'exemple représenté, les bordures intérieure 5 et extérieure 6 de la gorge annulaire 3 sont creusées respectivement d'une échancrure interne 7 et d'une échancrure externe 8 se trouvant l'une en face de l'autre.In the example shown, the inner 5 and outer 6 edges of the annular groove 3 are hollowed out respectively with an internal notch 7 and an external notch 8 located one opposite the other.

Quand la tête est vissée sur le réservoir et quand la pression de gaz interne est normale lors de la percussion, le joint 4 correctement écrasé sur le collet du réservoir, ferme de façon étanche le passage entre l'intérieur et l'extérieur, par les échancrures 7 et 8.When the head is screwed on the tank and when the internal gas pressure is normal during percussion, the seal 4 correctly crushed on the neck of the tank, tightly closes the passage between the inside and the outside, by the notches 7 and 8.

Par contre, s'il y a une surpression interne anormale, liée par exemple au fait que le remplissage du réservoir a été trop important et que par conséquent le volume libre est faible et la surpression trop forte, alors sous l'effet de cette surpression, le joint 4 va se déformer, voir se dilater vers l'extérieur comme le montre la figure 2, créant de ce fait une fuite de pression qui pallie aux risques de détérioration, ou même d'éclatement de l'appareil.On the other hand, if there is an abnormal internal overpressure, linked for example to the fact that the filling of the tank has been too large and that consequently the free volume is low and the overpressure too strong, then under the effect of this overpressure , the seal 4 will deform, see expand outward as shown in Figure 2, thereby creating a pressure leak which overcomes the risk of deterioration, or even bursting of the device.

Ce dispositif élimine donc tout risque immédiat et progressif lié à une surpression interne dans le réservoir, et cela de façon extrêmement simple et efficace.This device therefore eliminates any immediate and progressive risk linked to an internal overpressure in the tank, and this in an extremely simple and effective manner.

Avantageusement l'échancrure interne 7 peut être de dimension inférieure à celle de l'échancrure externe 8 qui doit pouvoir autoriser le déplacement du joint vers l'extérieur, les dimensions étant définies suivant chaque type d'extincteur.Advantageously, the internal notch 7 can be of dimension smaller than that of the external notch 8 which must be able to allow the displacement of the joint towards the outside, the dimensions being defined according to each type of extinguisher.

Claims (2)

Dispositif de sécurité anti haute-pression pour extincteur d'incendie dont la tête de distribution est fixée de façon étanche au réservoir contenant le produit à pulvériser, l'étanchéité étant assurée par un joint logé dans une gorge annulaire de ladite tête, le joint étant destiné à s'écraser sur un collet du réservoir lors de la fermeture de la tête, caractérisé en ce que les bordures (5, 6) de la gorge annulaire (3) dans laquelle est positionné le joint (4) sont chacune creusées d'une échancrure (7, 8) de part et d'autre du joint, l'une en face de l'autre.Anti-high pressure safety device for fire extinguisher, the dispensing head of which is tightly attached to the reservoir containing the product to be sprayed, the seal being provided by a seal housed in an annular groove in said head, the seal being intended to be crushed on a neck of the tank when the head is closed, characterized in that the edges (5, 6) of the annular groove (3) in which the seal (4) is positioned are each hollowed out with a notch (7, 8) on either side of the joint, one opposite the other. Dispositif de sécurité selon la revendication 1, caractérisé en ce que l'échancrure interne (7) peut être de dimension inférieure à celle de l'échancrure externe (8), les dimensions étant définies suivant chaque type d'extincteur.Safety device according to claim 1, characterized in that the internal notch (7) can be of dimension smaller than that of the external notch (8), the dimensions being defined according to each type of extinguisher.
EP96401032A 1995-05-15 1996-05-13 High pressure safety for fire extinguisher Expired - Lifetime EP0743077B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9505702A FR2734163B1 (en) 1995-05-15 1995-05-15 HIGH-PRESSURE ANTI-SECURITY DEVICE FOR FIRE EXTINGUISHER
FR9505702 1995-05-15

Publications (2)

Publication Number Publication Date
EP0743077A1 true EP0743077A1 (en) 1996-11-20
EP0743077B1 EP0743077B1 (en) 2001-11-21

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ID=9478965

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Application Number Title Priority Date Filing Date
EP96401032A Expired - Lifetime EP0743077B1 (en) 1995-05-15 1996-05-13 High pressure safety for fire extinguisher

Country Status (5)

Country Link
EP (1) EP0743077B1 (en)
AT (1) ATE209056T1 (en)
DE (1) DE69617091T2 (en)
ES (1) ES2168449T3 (en)
FR (1) FR2734163B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340107A1 (en) * 1976-02-03 1977-09-02 Schiffers Jean Fire extinguisher with compressed gas bottle - has handle to pierce bottle and operate separate sealing plunger to control liquid flow
BE878135A (en) * 1979-08-07 1979-12-03 Carr Roger HEAD COMPOSITION FOR A FIRE EXTINGUISHER
US4248484A (en) * 1979-09-24 1981-02-03 Smith International, Inc. Pressure venting O-ring bearing seal for rock bits
EP0141563A2 (en) * 1983-10-21 1985-05-15 Roger Carr Powder type fire extinguisher
DE9409359U1 (en) * 1994-06-09 1994-10-27 Eifel Spritzgus Gmbh Plastikve Fire extinguisher

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340107A1 (en) * 1976-02-03 1977-09-02 Schiffers Jean Fire extinguisher with compressed gas bottle - has handle to pierce bottle and operate separate sealing plunger to control liquid flow
BE878135A (en) * 1979-08-07 1979-12-03 Carr Roger HEAD COMPOSITION FOR A FIRE EXTINGUISHER
US4248484A (en) * 1979-09-24 1981-02-03 Smith International, Inc. Pressure venting O-ring bearing seal for rock bits
EP0141563A2 (en) * 1983-10-21 1985-05-15 Roger Carr Powder type fire extinguisher
DE9409359U1 (en) * 1994-06-09 1994-10-27 Eifel Spritzgus Gmbh Plastikve Fire extinguisher

Also Published As

Publication number Publication date
EP0743077B1 (en) 2001-11-21
DE69617091T2 (en) 2002-06-06
ES2168449T3 (en) 2002-06-16
FR2734163A1 (en) 1996-11-22
FR2734163B1 (en) 1997-08-01
ATE209056T1 (en) 2001-12-15
DE69617091D1 (en) 2002-01-03

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