EP1777455A1 - Flashback arrestor safety device for mounting without tooling - Google Patents

Flashback arrestor safety device for mounting without tooling Download PDF

Info

Publication number
EP1777455A1
EP1777455A1 EP05300838A EP05300838A EP1777455A1 EP 1777455 A1 EP1777455 A1 EP 1777455A1 EP 05300838 A EP05300838 A EP 05300838A EP 05300838 A EP05300838 A EP 05300838A EP 1777455 A1 EP1777455 A1 EP 1777455A1
Authority
EP
European Patent Office
Prior art keywords
nut
ring
gas
orifice
passage
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Withdrawn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
EP05300838A
Other languages
German (de)
French (fr)
Inventor
Marco Arzenton
Alessandro Moretti
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.)
FRO SpA
Original Assignee
FRO SpA
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 FRO SpA filed Critical FRO SpA
Priority to EP05300838A priority Critical patent/EP1777455A1/en
Publication of EP1777455A1 publication Critical patent/EP1777455A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/82—Preventing flashback or blowback
    • F23D14/825—Preventing flashback or blowback using valves

Definitions

  • the present invention relates to a safety device of the flame arresting type (ARPF) with manual screwing, that is to say without requiring the use of a suitable tool, in particular intended to equip pipelines with gases, such as fuel gas and / or combustion gas ducts connecting a gas expander or an expansion valve integrated to a welding torch, cutting or the like, and its manufacturing process.
  • gases such as fuel gas and / or combustion gas ducts connecting a gas expander or an expansion valve integrated to a welding torch, cutting or the like, and its manufacturing process.
  • ARPF type safety devices for combustible and oxidizing gases, such as oxygen are described in particular in the EN 730-1 or ISO 5175 standard.
  • ARPF-type safety devices protect the gas circuits against the flow of gas in the opposite direction to that desired, commonly known as the slow return of gas, and against the propagation or rise of a flame or backfire , especially in the pipes and / or in the regulator or an integrated pressure regulating valve located upstream of the ARPF type device.
  • the slow gas return is usually prevented by a valve that opens under the effect of the pressure when it is exercised correctly upstream of the device, that is to say when the gas flows in the desired direction, and, conversely, closes if the downstream gas pressure is greater than the upstream gas pressure.
  • the flameback is conventionally prevented by a porous filter, generally obtained by sintering of stainless steel grains, which offers the gas that passes through it only holes of section smaller than that which can pass through a flame without 'switch off.
  • ARPF type devices are very efficient and widely used industrially, especially in the field of welding, cutting or the like where they are conventionally mounted upstream torches, that is to say on the side of the arrival of the pipes gas supplying the torches fuel gas and oxidizer or, at the opposite end, that is to say at the outlet of the expansion valve or integrated pressure valve which is connected to one or more gas pipes.
  • an ARPF type safety device on a pressure reducer or pressure reducer, for example, is by screwing a threaded end portion of the device onto the threaded outlet of the pressure reducer or pressure reducer, the another end of the ARPF device being connected to the gas pipe for supplying the torch fuel gas or oxidant, such as oxygen.
  • EP-A-1512910 proposes an ARPF type device with a non-dissociable nut-ring, comprising an upstream portion constricted in the direction of the body by mechanical deformation, and retained by cooperation of the tightened upstream portion with at least a portion of the body of the ARPF.
  • the ring nut itself can be degraded when the ARPF is subject to frequent assembly and disassembly, since the clamping tool will, each time, cause a more or less significant degradation of the surface of the nut on which it will come to support and where the couple will be applied.
  • the problem that arises then is to propose an improved ARPF type device that can be easily connected to a device to be secured, in particular to a regulator or valve-regulator connected in particular, via one or more gas conduits, to a welding torch, cutting or the like, which does not require the use of a clamping tool, and which is low cost to manufacture industrially.
  • the invention also relates to a gas pipe, expansion valve or gas expansion valve comprising an ARPF device according to the invention, as well as the use of such an ARPF device to protect a gas pipe, an expansion valve or a tap.
  • gas expansion valve in particular an expansion valve or a pressure reducing valve connected to a welding, cutting or similar manual welding torch.
  • FIGS. 1 (side view) and 2 (longitudinal sectional view) show an embodiment of an ARPF flame arrestor type safety device according to the invention, in particular for a regulator or pressure reducing valve of FIG. welding gas.
  • the ARPF type safety device comprises a main body 1, of elongated shape and of axis AA, traversed by an internal gas passage 2 connecting a first orifice 4 to a second orifice 5 through which the gas flows.
  • the gas therefore normally flows in the device in the direction from the orifice 4 to the orifice 5 (direction of the arrow F).
  • Conventional safety means capable of performing the functions of gas anti-return and flame arrestor, are arranged on the gas passage 2, inside the body 1.
  • These means comprise, in a manner known per se, a flame-arresting filter 10 and a valve means 12 acting as an anti-return gas, as well as other elements, such as return spring 11, valve seat 13 ...
  • the device also comprises a ring-nut 6 which can not be separated from said body and is free to rotate about the axis AA thereof.
  • the nut-ring 6 is positioned so as to form a sleeve that is free to rotate around the connection piece 7.
  • This ring-nut 6 is used to connect the ARPF device on the fitting of a pressure reducer or expansion valve for example or on any other device to be protected by such a device.
  • the ring-nut 6 has a downstream portion 8 internally threaded adapted to cooperate by screwing with a complementary threaded portion of the expander, expansion valve or the like.
  • the inner wall of the nut ring 6 has a shoulder 15 projecting radially towards the connection piece 7, that is to say say towards the axis AA, and cooperating with a stop 14 arranged within the connecting piece 7 so as to retain the ring-nut 6 in position around the connecting piece 7 and to prevent its disengagement of with the body 1, while allowing a free rotation of the ring-nut 6 about the axis AA of the body 1.
  • the abutment 14 may be constituted for example by a projecting portion of this wall of the endpiece 7.
  • the shoulder 15 may be made, as appropriate, for example by cutting a part of the wall of the ring-nut 6 or by cold mechanical deformation as taught by EP-A-1512910 .
  • the nut-ring 6 is made of a deformable metal or metal alloy, for example brass, copper, steel or aluminum.
  • said nut-ring 6 comprises, on all or part of its outer peripheral surface, an area 16 shaped and / or machined so as to obtain a roughness, a structure and / or shape giving it good grip and good maneuverability by the operator by allowing easy manual rotation by application of sufficient torque to a good hold by application of a minimum force, even when the operator is wearing gloves.
  • connection end piece 7 of the ARPF which is of oblong shape, is traversed axially by an internal gas passage 2 having a first orifice 4 at its connection end on the the device to which the ARPF must be connected.
  • the ARPF includes a second orifice 5 from which is likely to come the flashback.
  • the ARPF of the present invention comprises, on its connecting piece 7, a peripheral housing 3, such as an annular groove, in which a sealing means is arranged. 9 fluidic, such as an O-ring.
  • this housing 3 with sealing means 9 it is possible to make an ARPF only manually screwing, that is to say without tools, the thread or tapping 8 located on the inner wall of the ring- nut 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

The device has an elongated body (1) traversed by an internal gas passage (2) connecting two orifices (4, 5). The orifice (4) is supported by a jointing ferrule (7) traversed axially by the internal passage. A thrust-nut (6) is positioned in a manner to form a sleeve free in rotation around the ferrule which has a peripheral housing (3) e.g. annular groove, in which a fluidic sealing unit (9) e.g. O-ring, is arranged. An internal wall of the thrust-nut comprises a flange (15) cooperating with a stop (14) arranged inside the ferrule. The nut includes a zone on its external part.

Description

La présente invention porte sur un dispositif de sécurité de type anti-retour pare-flamme (ARPF) à vissage manuel, c'est-à-dire sans nécessiter l'utilisation d'un outil adapté, en particulier destiné à équiper des canalisations de gaz, telles que les conduits de gaz combustible et/ou comburant reliant un détendeur de gaz ou un robinet à détendeur intégré à un chalumeau de soudage, coupage ou analogue, ainsi que son procédé de fabrication.The present invention relates to a safety device of the flame arresting type (ARPF) with manual screwing, that is to say without requiring the use of a suitable tool, in particular intended to equip pipelines with gases, such as fuel gas and / or combustion gas ducts connecting a gas expander or an expansion valve integrated to a welding torch, cutting or the like, and its manufacturing process.

Les dispositifs de sécurité de type ARPF pour les gaz combustibles et comburants, tel l'oxygène, sont décrits notamment dans la norme EN 730-1 ou ISO 5175.ARPF type safety devices for combustible and oxidizing gases, such as oxygen, are described in particular in the EN 730-1 or ISO 5175 standard.

Les dispositifs de sécurité de type ARPF protègent les circuits de gaz contre la circulation du gaz dans le sens inverse de celui souhaité, communément appelé le retour lent de gaz, et contre la propagation ou remontée d'une flamme ou d'un retour de flamme, notamment dans les canalisations et/ou dans le détendeur ou un robinet à détendeur intégré situés en amont du dispositif de type ARPF.ARPF-type safety devices protect the gas circuits against the flow of gas in the opposite direction to that desired, commonly known as the slow return of gas, and against the propagation or rise of a flame or backfire , especially in the pipes and / or in the regulator or an integrated pressure regulating valve located upstream of the ARPF type device.

Le retour gaz lent est habituellement empêché par un clapet qui s'ouvre sous l'effet de la pression lorsque celle-ci s'exerce correctement en amont du dispositif, c'est-à-dire lorsque le gaz circule dans le sens souhaité, et, à l'inverse, se ferme si la pression de gaz aval vient à être supérieure à la pression de gaz amont.The slow gas return is usually prevented by a valve that opens under the effect of the pressure when it is exercised correctly upstream of the device, that is to say when the gas flows in the desired direction, and, conversely, closes if the downstream gas pressure is greater than the upstream gas pressure.

Par ailleurs, le retour de flamme est classiquement prévenu par un filtre poreux, généralement obtenu par frittage de grains d'acier inoxydable, qui n'offre au gaz qui le traverse que des orifices de section inférieure à celle que peut traverser une flamme sans s'éteindre.Moreover, the flameback is conventionally prevented by a porous filter, generally obtained by sintering of stainless steel grains, which offers the gas that passes through it only holes of section smaller than that which can pass through a flame without 'switch off.

Les dispositifs de type ARPF sont très efficaces et largement utilisés au plan industriel, notamment dans le domaine du soudage, coupage ou analogue où ils sont classiquement montés en amont des chalumeaux, c'est-à-dire du côté de l'arrivée des canalisations de gaz alimentant les chalumeaux en gaz combustible et comburant ou, à l'extrémité opposée, c'est-à-dire en sortie du détendeur ou robinet à détendeur intégré auquel est relié une ou plusieurs canalisations de gaz.ARPF type devices are very efficient and widely used industrially, especially in the field of welding, cutting or the like where they are conventionally mounted upstream torches, that is to say on the side of the arrival of the pipes gas supplying the torches fuel gas and oxidizer or, at the opposite end, that is to say at the outlet of the expansion valve or integrated pressure valve which is connected to one or more gas pipes.

Actuellement, la fixation d'un dispositif de sécurité de type ARPF sur un détendeur ou robinet-détendeur par exemple, se fait par vissage d'une partie d'extrémité taraudée du dispositif sur la sortie filetée du détendeur ou robinet-détendeur, l'autre extrémité du dispositif ARPF étant raccordée à la canalisation de gaz servant à alimenter le chalumeau en gaz combustible ou comburant, tel de l'oxygène.Currently, the attachment of an ARPF type safety device on a pressure reducer or pressure reducer, for example, is by screwing a threaded end portion of the device onto the threaded outlet of the pressure reducer or pressure reducer, the another end of the ARPF device being connected to the gas pipe for supplying the torch fuel gas or oxidant, such as oxygen.

Le vissage par l'utilisateur d'un ARPF sur un détendeur, robinet-détendeur ou analogue devant le recevoir se fait habituellement par actionnement en rotation d'une partie mobile en rotation appelée « pièce-écrou » ou « bague-écrou » portée par l'ARPF lui-même.The screwing by the user of an ARPF on a pressure reducer, pressure reducing valve or the like to receive it is usually done by actuating in rotation a rotating part called "piece-nut" or "ring-nut" carried by the ARPF itself.

A ce titre, on peut se reporter au document EP-A-1512910 qui propose un dispositif de type ARPF avec une bague-écrou non-dissociable, comportant une portion amont resserrée en direction du corps par déformation mécanique, et retenue par coopération de la portion amont resserrée avec au moins une partie du corps de l'ARPF.As such, reference can be made to the document EP-A-1512910 which proposes an ARPF type device with a non-dissociable nut-ring, comprising an upstream portion constricted in the direction of the body by mechanical deformation, and retained by cooperation of the tightened upstream portion with at least a portion of the body of the ARPF.

Actuellement, le serrage de cette bague-écrou par l'opérateur se faisant toujours avec une clé adaptée permettant de lui conférer un couple approprié au serrage.Currently, the tightening of this ring-nut by the operator is always done with a suitable key to give it a torque suitable for tightening.

En effet, réaliser un serrage avec un outil adapté est obligatoire pour assurer une étanchéité métal-métal suffisante entre le passage interne de gaz de l'ARPF et le passage interne réciproque du dispositif auquel il est raccordé.Indeed, perform a tightening with a suitable tool is required to ensure a sufficient metal-metal seal between the internal gas passage of the ARPF and the reciprocal internal passage of the device to which it is connected.

Or, devoir utiliser un outil n'est pas pratique car il rend obligatoire de disposer d'un outil adapté.However, having to use a tool is not practical because it makes it mandatory to have a suitable tool.

De plus, cela conduit aussi, au fil du temps, à des problèmes de dégradation des filetages ou de l'ARPF, notamment si un couple de serrage important est appliqué via l'outil de serrage, alors que le positionnement de l'ARFP par rapport au détendeur ou robinet-détendeur sur lequel il est monté n'est pas correct.In addition, this also leads, over time, to problems of degradation of the threads or the ARPF, especially if a large tightening torque is applied via the clamping tool, while the positioning of the ARFP by compared to the regulator or regulator valve on which it is mounted is not correct.

De même, la bague-écrou elle-même peut être dégradée lorsque l'ARPF est soumis à des montages et démontages fréquents, puisque l'outil de serrage va, à chaque fois, provoquer une dégradation plus ou moins notable de la surface de l'écrou sur lequel il viendra prendre appui et où le couple sera appliqué.Similarly, the ring nut itself can be degraded when the ARPF is subject to frequent assembly and disassembly, since the clamping tool will, each time, cause a more or less significant degradation of the surface of the nut on which it will come to support and where the couple will be applied.

Par ailleurs, lors du montage d'un ARPF sur un détendeur ou robinet-détendeur, un couple de serrage important opéré sur l'ARPF à l'aide d'un outil, telle une clé de vissage, peut provoquer, dans le cas d'un filet 'gauche', un dévissage du raccord de sortie du détendeur puisqu'il est lui-même normalement vissé sur le corps du détendeur via un filet 'droit'. Autrement, le vissage de l'ARPF va provoquer le dévissage intempestif du raccord sur lequel on souhaite monter ledit ARPF.Furthermore, when mounting an ARPF on a pressure reducer or expansion valve, a large tightening torque operated on the ARPF with the aid of a tool, such as a screwdriver, can cause, in the case of 'a' left 'thread, a unscrewing of the outlet fitting of the regulator since it is itself normally screwed on the body of the regulator via a net 'right'. Otherwise, the screwing of the ARPF will cause the inadvertent unscrewing of the fitting on which it is desired to mount said ARPF.

Au vu de cela, le problème qui se pose alors est de proposer un dispositif de type ARPF amélioré pouvant être facilement raccordé à un appareil à sécuriser, en particulier à un détendeur ou robinet-détendeur notamment relié, via un ou plusieurs conduits de gaz, à un chalumeau de soudage, coupage ou similaire, lequel ne nécessite pas l'utilisation d'un outil de serrage, et qui soit de coût faible à fabriquer au plan industriel.In view of this, the problem that arises then is to propose an improved ARPF type device that can be easily connected to a device to be secured, in particular to a regulator or valve-regulator connected in particular, via one or more gas conduits, to a welding torch, cutting or the like, which does not require the use of a clamping tool, and which is low cost to manufacture industrially.

La solution de l'invention est alors un dispositif de sécurité de type anti-retour pare-flamme (ARPF) comprenant un corps traversé par un passage de gaz interne reliant un premier orifice à un second orifice, des moyens de sécurité, agencés dans le corps, sur le passage de gaz, et une bague-écrou non-dissociable dudit corps, libre en rotation autour de l'axe du corps et comprenant un taraudage interne, caractérisé en ce que :

  • le premier orifice du passage est porté par un embout de raccordement traversé axialement par ledit passage interne,
  • ladite bague-écrou est positionnée de manière à former un manchon libre en rotation autour de l'embout de raccordement, et
  • l'embout de raccordement comporte un logement périphérique dans lequel est agencé un moyen d'étanchéité fluidique,
de manière à permettre un vissage sans outil dudit dispositif de sécurité.The solution of the invention is then a flame arrestor type safety device (ARPF) comprising a body traversed by an internal gas passage connecting a first orifice to a second orifice, safety means, arranged in the body, on the gas passage, and a non-separable nut-ring of said body, free to rotate about the axis of the body and comprising an internal thread, characterized in that:
  • the first orifice of the passage is carried by a connecting piece traversed axially by said internal passage,
  • said ring-nut is positioned to form a sleeve free to rotate about the connection end, and
  • the connection piece comprises a peripheral housing in which a fluidic sealing means is arranged,
in order to allow a tool-free screwing of said safety device.

Selon le cas, le dispositif de l'invention peut comprendre l'une ou plusieurs des caractéristiques suivantes :

  • le moyen d'étanchéité fluidique est un joint torique.
  • l'embout de raccordement est de forme oblongue.
  • l'embout de raccordement a une extrémité en saillie de forme ogivale au niveau de laquelle débouche le passage au niveau du premier orifice.
  • le logement périphérique est une gorge annulaire.
  • les moyens de sécurité comprennent un filtre pare-flamme, un moyen à ressort, un moyen à clapet et un siège de clapet.
  • la bague-écrou est retenue sur le corps par l'intermédiaire d'un épaulement porté par la paroi interne de ladite bague-écrou, ledit épaulement se projetant radialement en direction de l'embout de raccordement.
  • l'épaulement de la bague-écrou coopère avec une butée aménagée sur l'embout de raccordement de manière à retenir la bague-écrou en position autour de l'embout de raccordement et à empêcher sa désolidarisation d'avec le corps.
As the case may be, the device of the invention may comprise one or more of the following characteristics:
  • the fluidic sealing means is an O-ring.
  • the connection end is oblong.
  • the connecting end has a protruding end of ogival shape at which opens the passage at the first orifice.
  • the peripheral housing is an annular groove.
  • the security means comprise a flame filter, a spring means, a valve means and a valve seat.
  • the ring-nut is retained on the body by means of a shoulder carried by the inner wall of said ring-nut, said shoulder projecting radially in the direction of the connection piece.
  • the shoulder of the nut-ring cooperates with an abutment arranged on the connecting piece so as to retain the ring-nut in position around the connection piece and to prevent its separation from the body.

L'invention concerne aussi une canalisation de gaz, détendeur ou robinet-détendeur de gaz comportant un dispositif ARPF selon l'invention, ainsi que l'utilisation d'un tel dispositif ARPF pour protéger une canalisation de gaz, un détendeur ou un robinet-détendeur de gaz, en particulier un détendeur ou un robinet-détendeur raccordé à un chalumeau manuel de soudage, coupage ou analogue.The invention also relates to a gas pipe, expansion valve or gas expansion valve comprising an ARPF device according to the invention, as well as the use of such an ARPF device to protect a gas pipe, an expansion valve or a tap. gas expansion valve, in particular an expansion valve or a pressure reducing valve connected to a welding, cutting or similar manual welding torch.

L'invention va être mieux comprise grâce aux explications détaillées données ci-après en références aux figures annexées.The invention will be better understood thanks to the detailed explanations given hereinafter with reference to the appended figures.

Les figures 1 (vue de côté) et 2 (vue en coupe longitudinale) montrent un mode de réalisation d'un dispositif de sécurité de type anti-retour pare-flamme ARPF selon l'invention, en particulier pour détendeur ou robinet-détendeur de gaz de soudage.FIGS. 1 (side view) and 2 (longitudinal sectional view) show an embodiment of an ARPF flame arrestor type safety device according to the invention, in particular for a regulator or pressure reducing valve of FIG. welding gas.

Comme détaillé sur la figure 2, le dispositif de sécurité de type ARPF selon l'invention comprend un corps 1 principal, de forme allongée et d'axe A-A, traversé par un passage de gaz 2 interne reliant un premier orifice 4 à un second orifice 5 par lesquels cheminent les flux gazeux. En fonctionnement normal, le gaz circule donc normalement dans le dispositif dans le sens allant de l'orifice 4 vers l'orifice 5 (sens de la flèche F).As detailed in FIG. 2, the ARPF type safety device according to the invention comprises a main body 1, of elongated shape and of axis AA, traversed by an internal gas passage 2 connecting a first orifice 4 to a second orifice 5 through which the gas flows. In normal operation, the gas therefore normally flows in the device in the direction from the orifice 4 to the orifice 5 (direction of the arrow F).

Des moyens de sécurité classiques, aptes à assurer les fonctions d'anti-retour de gaz et de pare-flamme, sont agencés sur le passage de gaz 2, à l'intérieur du corps 1.Conventional safety means, capable of performing the functions of gas anti-return and flame arrestor, are arranged on the gas passage 2, inside the body 1.

Ces moyens comprennent, de façon connue en soi, un filtre pare-flamme 10 et un moyen à clapet 12 faisant office d'anti-retour de gaz, ainsi que d'autres éléments, tels que ressort de rappel 11, siège de clapet 13...These means comprise, in a manner known per se, a flame-arresting filter 10 and a valve means 12 acting as an anti-return gas, as well as other elements, such as return spring 11, valve seat 13 ...

Le dispositif comprend aussi une bague-écrou 6 non-dissociable dudit corps et libre en rotation autour de l'axe A-A de celui-ci. Autrement dit, la bague-écrou 6 est positionnée de manière à former un manchon libre en rotation autour de l'embout de raccordement 7.The device also comprises a ring-nut 6 which can not be separated from said body and is free to rotate about the axis AA thereof. In other words, the nut-ring 6 is positioned so as to form a sleeve that is free to rotate around the connection piece 7.

Cette bague-écrou 6 sert au raccordement du dispositif ARPF sur le raccord d'un détendeur ou robinet-détendeur par exemple ou sur tout autre appareil devant être protégé par un tel dispositif. Pour ce faire, la bague-écrou 6 comporte une portion aval 8 taraudée interne apte à venir coopérer par vissage avec une partie filetée complémentaire du détendeur, robinet-détendeur ou analogue.This ring-nut 6 is used to connect the ARPF device on the fitting of a pressure reducer or expansion valve for example or on any other device to be protected by such a device. To do this, the ring-nut 6 has a downstream portion 8 internally threaded adapted to cooperate by screwing with a complementary threaded portion of the expander, expansion valve or the like.

Pour assurer le maintien de la bague-écrou 6 sur le corps 1 du dispositif ARPF, la paroi interne de la bague-écrou 6 comporte un épaulement 15 se projetant radialement en direction de l'embout de raccordement 7, c'est-à-dire vers l'axe A-A, et venant coopérer avec une butée 14 aménagée au sein de l'embout de raccordement 7 de manière à retenir la bague-écrou 6 en position autour de l'embout de raccordement 7 et à empêcher sa désolidarisation d'avec le corps 1, tout en autorisant une rotation libre de la bague-écrou 6 autour de l'axe A-A du corps 1.To maintain the nut ring 6 on the body 1 of the ARPF device, the inner wall of the nut ring 6 has a shoulder 15 projecting radially towards the connection piece 7, that is to say say towards the axis AA, and cooperating with a stop 14 arranged within the connecting piece 7 so as to retain the ring-nut 6 in position around the connecting piece 7 and to prevent its disengagement of with the body 1, while allowing a free rotation of the ring-nut 6 about the axis AA of the body 1.

La butée 14 peut être par exemple constituée par une partie en saillie de cette paroi de l'embout 7.The abutment 14 may be constituted for example by a projecting portion of this wall of the endpiece 7.

L'épaulement 15 peut être réalisé, selon le cas, par exemple par décolletage d'une partie de la paroi de la bague-écrou 6 ou alors par déformation mécanique à froid comme enseigné par EP-A-1512910 .The shoulder 15 may be made, as appropriate, for example by cutting a part of the wall of the ring-nut 6 or by cold mechanical deformation as taught by EP-A-1512910 .

De préférence, la bague-écrou 6 est en un métal ou alliage métallique déformable, par exemple du laiton, du cuivre, en acier, en aluminium.Preferably, the nut-ring 6 is made of a deformable metal or metal alloy, for example brass, copper, steel or aluminum.

Afin de faciliter la préhension et la rotation manuelle de la bague-écrou 6 par l'utilisateur, ladite bague-écrou 6 comporte, sur tout ou partie de sa surface périphérique externe, une zone 16 conformée et/ou usinée de manière à obtenir une rugosité, une structure et/ou une forme lui conférant une bonne adhérence et une bonne manoeuvrabilité par l'opérateur en permettant sa rotation manuelle aisée par application d'un couple suffisant à une bonne tenue par application d'une force minimum, même lorsque l'opérateur est muni de gants.In order to facilitate gripping and manual rotation of the nut-ring 6 by the user, said nut-ring 6 comprises, on all or part of its outer peripheral surface, an area 16 shaped and / or machined so as to obtain a roughness, a structure and / or shape giving it good grip and good maneuverability by the operator by allowing easy manual rotation by application of sufficient torque to a good hold by application of a minimum force, even when the operator is wearing gloves.

Par ailleurs, comme visible sur le Figure 2, l'embout de raccordement 7 de l'ARPF, qui est de forme oblongue, est traversé axialement par un passage 2 interne de gaz comportant un premier orifice 4 à son extrémité de raccordement du côté de l'appareil auquel doit être raccordé l'ARPF. En outre, l'ARPF comprend un deuxième orifice 5 d'où est susceptible de provenir le retour de flamme.Furthermore, as can be seen in FIG. 2, the connection end piece 7 of the ARPF, which is of oblong shape, is traversed axially by an internal gas passage 2 having a first orifice 4 at its connection end on the the device to which the ARPF must be connected. In addition, the ARPF includes a second orifice 5 from which is likely to come the flashback.

Afin de répondre aux problèmes existant avec les ARPF de l'art antérieur, l'ARPF de la présente invention comporte, sur son embout de raccordement 7, un logement 3 périphérique, telle une gorge annulaire, dans lequel est agencé un moyen d'étanchéité 9 fluidique, tel un joint torique.In order to respond to the problems existing with the ARPFs of the prior art, the ARPF of the present invention comprises, on its connecting piece 7, a peripheral housing 3, such as an annular groove, in which a sealing means is arranged. 9 fluidic, such as an O-ring.

Grâce à la présence de ce logement 3 avec moyen d'étanchéité 9, il est possible de réaliser un ARPF à vissage uniquement manuel, c'est à dire sans outil, le filetage ou taraudage 8 se trouvant sur la paroi interne de la bague-écrou 6.Thanks to the presence of this housing 3 with sealing means 9, it is possible to make an ARPF only manually screwing, that is to say without tools, the thread or tapping 8 located on the inner wall of the ring- nut 6.

En effet, avec un tel arrangement, l'étanchéité fluidique métal/métal classique qui nécessitait un couple de serrage important pour assurer une étanchéité efficace, donc nécessitant impérativement l'usage d'un outil de serrage, est remplacée par une étanchéité métal/joint torique qui nécessite un couple de serrage beaucoup plus faible et autorise de ce fait un serrage uniquement manuel.Indeed, with such an arrangement, the conventional metal / metal fluidic tightness which required a large tightening torque to ensure an effective seal, thus imperatively requiring the use of a clamping tool, is replaced by a metal seal / seal toric which requires a much lower tightening torque and thus allows manual tightening only.

Claims (10)

Dispositif de sécurité de type anti-retour pare-flamme (ARPF) comprenant : - un corps (1) traversé par un passage de gaz (2) interne reliant un premier orifice (4) à un second orifice (5), - des moyens de sécurité (10,11, 12), agencés dans le corps (1), sur le passage de gaz (2), et - une bague-écrou (6) non-dissociable dudit corps (1), libre en rotation autour de l'axe du corps (1) et comprenant un taraudage (8) interne, caractérisé en ce que : - le premier orifice (4) du passage (2) est porté par un embout de raccordement (7) traversé axialement par ledit passage (2) interne, - ladite bague-écrou (6) est positionnée de manière à former un manchon libre en rotation autour de l'embout de raccordement (7), et - l'embout de raccordement (7) comporte un logement (3) périphérique dans lequel est agencé un moyen d'étanchéité (9) fluidique,
de manière à permettre un vissage sans outil dudit dispositif de sécurité. A flame arrestor type safety device (ARPF) comprising: a body (1) traversed by an internal gas passage (2) connecting a first orifice (4) to a second orifice (5), safety means (10, 11, 12) arranged in the body (1), on the gas passage (2), and - a ring-nut (6) non-separable from said body (1), free to rotate about the axis of the body (1) and comprising an internal thread (8), characterized in that the first orifice (4) of the passage (2) is carried by a connection piece (7) traversed axially by said internal passage (2), said nut-ring (6) is positioned so as to form a sleeve which is free to rotate around the connection piece (7), and the connection piece (7) comprises a peripheral housing (3) in which a fluidic sealing means (9) is arranged,
in order to allow a tool-free screwing of said safety device. Dispositif selon la revendication 1, caractérisé en ce que le moyen d'étanchéité (9) fluidique est un joint torique.Device according to claim 1, characterized in that the fluidic sealing means (9) is an O-ring. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'embout de raccordement (7) est de forme oblongue.Device according to claim 1 or 2, characterized in that the connecting piece (7) is oblong. Dispositif selon les revendications 1 à 3, caractérisé en ce que l'embout de raccordement (7) a une extrémité en saillie de forme ogivale au niveau de laquelle débouche le passage (2) au niveau du premier orifice (4).Device according to claims 1 to 3, characterized in that the connecting piece (7) has a protruding end of ogival shape at which opens the passage (2) at the first orifice (4). Dispositif selon les revendications 1 à 4, caractérisé en ce que le logement (3) périphérique est une gorge annulaire.Device according to Claims 1 to 4, characterized in that the peripheral housing (3) is an annular groove. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que les moyens de sécurité (10,11, 12) comprennent un filtre pare-flamme (10), un moyen à ressort (11), un moyen à clapet (12) et un siège de clapet (13).Device according to one of claims 1 to 5, characterized in that the safety means (10, 11, 12) comprise a flame-arresting filter (10), a spring means (11), a flap means (12). ) and a valve seat (13). Dispositif selon la revendication 1 à 6, caractérisé en ce que la bague-écrou (6) est retenue sur le corps (1) par l'intermédiaire d'un épaulement (15) porté par la paroi interne de ladite bague-écrou (6), ledit épaulement (15) se projetant radialement en direction de l'embout de raccordement (7).Device according to claim 1 to 6, characterized in that the nut ring (6) is retained on the body (1) by means of a shoulder (15) carried by the inner wall of said nut ring (6). ), said shoulder (15) projecting radially towards the connecting piece (7). Dispositif selon la revendication 1 à 7, caractérisé en ce que l'épaulement (15) de la bague-écrou (6) coopère avec une butée (14) aménagée sur l'embout de raccordement (7) de manière à retenir la bague-écrou (6) en position autour de l'embout de raccordement (7) et à empêcher sa désolidarisation d'avec le corps (1).Device according to claim 1 to 7, characterized in that the shoulder (15) of the nut ring (6) cooperates with an abutment (14) arranged on the connecting piece (7) so as to retain the ring nut (6) in position around the connection piece (7) and to prevent its separation from the body (1). Canalisation de gaz, détendeur ou robinet-détendeur de gaz comportant un dispositif de sécurité selon l'une des revendications 1 à 8.Gas line, expansion valve or gas expansion valve comprising a safety device according to one of claims 1 to 8. Utilisation d'un dispositif de sécurité selon l'une des revendications 1 à 8 pour protéger une canalisation de gaz, un détendeur ou un robinet-détendeur de gaz, en particulier un détendeur ou un robinet-détendeur raccordé à un chalumeau manuel de soudage, coupage ou analogue.Use of a safety device according to one of claims 1 to 8 to protect a gas pipe, an expansion valve or a gas expansion valve, in particular an expansion valve or a pressure reducer connected to a manual welding torch, cutting or the like.
EP05300838A 2005-10-19 2005-10-19 Flashback arrestor safety device for mounting without tooling Withdrawn EP1777455A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05300838A EP1777455A1 (en) 2005-10-19 2005-10-19 Flashback arrestor safety device for mounting without tooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05300838A EP1777455A1 (en) 2005-10-19 2005-10-19 Flashback arrestor safety device for mounting without tooling

Publications (1)

Publication Number Publication Date
EP1777455A1 true EP1777455A1 (en) 2007-04-25

Family

ID=35840647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05300838A Withdrawn EP1777455A1 (en) 2005-10-19 2005-10-19 Flashback arrestor safety device for mounting without tooling

Country Status (1)

Country Link
EP (1) EP1777455A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2661965A (en) * 1948-10-07 1953-12-08 Chiksan Co Union which permits misalignment
FR1086073A (en) * 1953-07-03 1955-02-09 Air Liquide Improvements to gas-tight fittings under high pressure for pipes
GB2181530A (en) * 1985-09-10 1987-04-23 Butcher Brothers Limited Flashback arrestor
US5197769A (en) * 1988-01-27 1993-03-30 Nwd International, Inc. Adjustable O-ring port fitting for a hydraulic coupling
EP1033516A1 (en) * 1999-03-01 2000-09-06 Alessandro Piana Valve for regulating fluids
EP1512910A1 (en) 2003-09-03 2005-03-09 FRO Srl Flashback arresting device with cold deformed swivel nut

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2661965A (en) * 1948-10-07 1953-12-08 Chiksan Co Union which permits misalignment
FR1086073A (en) * 1953-07-03 1955-02-09 Air Liquide Improvements to gas-tight fittings under high pressure for pipes
GB2181530A (en) * 1985-09-10 1987-04-23 Butcher Brothers Limited Flashback arrestor
US5197769A (en) * 1988-01-27 1993-03-30 Nwd International, Inc. Adjustable O-ring port fitting for a hydraulic coupling
EP1033516A1 (en) * 1999-03-01 2000-09-06 Alessandro Piana Valve for regulating fluids
EP1512910A1 (en) 2003-09-03 2005-03-09 FRO Srl Flashback arresting device with cold deformed swivel nut

Similar Documents

Publication Publication Date Title
EP1561991B1 (en) Quick-acting female coupling and coupling comprising such quick-acting female coupling
EP1333218B1 (en) Quick acting coupling for the disconnectable connection of two pipelines
EP2771598B1 (en) Isolating valve
EP1421305B1 (en) Fluid flow control cock fitted with a lever having several stable positions
CA2945762C (en) Sealed nut
EP1106212B1 (en) Nozzle for fire-fighting
EP1561988A1 (en) Quick-acting connector
CA2658066C (en) Filtration device for aircraft with filter rotation stop
EP1681232B1 (en) Breathable gas pressure regulator
EP1327804B2 (en) Valve for pressure bottle
CA2844977C (en) Female element and connection designed to produce a removable joint between two fluid pipes
FR2638807A3 (en) SAFETY VALVE FOR A COMPRESSED GAS BOTTLE
FR2761454A1 (en) MANOMETER TAP FOR COMPRESSED GAS BOTTLE
FR2951799A1 (en) GAS RESERVOIR VALVE
EP1777455A1 (en) Flashback arrestor safety device for mounting without tooling
EP2449292A1 (en) Expansion valve with a plug and a flow selector
EP1512910A1 (en) Flashback arresting device with cold deformed swivel nut
FR2899300A1 (en) Liquefied gas cylinder`s valve device for gas installation, has part with passage to house assembly of valve and flow limiter and to support lateral branch connected to body above end, and channel connecting cavity to cylinder volume
FR2818727A1 (en) VALVE WITH OPENING AMPLIFICATION AND PRESSURE REGULATOR EQUIPPED WITH SUCH A VALVE
FR2752609A1 (en) Ball valve for pressurised fluid line
FR2699988A1 (en) Gas torch nozzle.
EP1808633A1 (en) low pressure manually operated threaded connector for gas regulator
EP3775645B1 (en) Improved regulating valve with integrated purge function
EP3346169B1 (en) Fluid supply connection for sanitary fitting with check valve
FR2786718A1 (en) Welding torch assembly consisting of torch, gas feed hoses and quick connecting connectors.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20070511