EP1512910A1 - Flashback arresting device with cold deformed swivel nut - Google Patents

Flashback arresting device with cold deformed swivel nut Download PDF

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Publication number
EP1512910A1
EP1512910A1 EP03292162A EP03292162A EP1512910A1 EP 1512910 A1 EP1512910 A1 EP 1512910A1 EP 03292162 A EP03292162 A EP 03292162A EP 03292162 A EP03292162 A EP 03292162A EP 1512910 A1 EP1512910 A1 EP 1512910A1
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EP
European Patent Office
Prior art keywords
nut
ring
upstream portion
gas
boss
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.)
Ceased
Application number
EP03292162A
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German (de)
French (fr)
Inventor
Pierluigi Quintarelli
Mariano Biasio
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FRO S.P.A.
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FRO Srl
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Filing date
Publication date
Application filed by FRO Srl filed Critical FRO Srl
Priority to EP03292162A priority Critical patent/EP1512910A1/en
Publication of EP1512910A1 publication Critical patent/EP1512910A1/en
Ceased legal-status Critical Current

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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
    • 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
    • F23D14/465—Details, e.g. noise reduction means for torches
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
    • A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes

Definitions

  • the present invention relates to a safety device of the type anti-return flame arrestor (ARPF), in particular intended to equip gas pipelines, such as fuel gas and / or combustion gas ducts of a welding torch, cutting or analogue, as well as its manufacturing process.
  • ARPF anti-return flame arrestor
  • ARPF type safety devices for combustible gases and Oxidizers, such as oxygen, are described in particular in the NF EN 730 standard.
  • ARPF safety devices protect the gas circuits against gas flow in the opposite direction to that desired, commonly referred to as the slow return of gas, and against the spread or rise of a flame or a return of flame, especially in the pipes 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 pressure downstream gas comes to be greater than the upstream gas pressure.
  • the flashback is conventionally prevented by a porous filter, generally obtained by sintering grains of stainless steel, which does not offer gas which crosses that openings of section lower than that which can cross a flame without extinguishing.
  • ARPF devices are very efficient and widely used particularly in the field of welding, cutting or the like where they are classically mounted upstream of the torches, that is to say on the side of the arrival of gas pipes supplying the torches with combustible and oxidizing gas.
  • an ARPF type safety device on the handle of an oxy-gas torch for example, is done by screwing an end portion tapped the device on the threaded inlet of the torch, the other end of the device ARPF being connected to the gas pipe for supplying the gas torch combustible or oxidant (oxygen).
  • the piece-nut serving to fix torch ARPF device, as well as the ARPF device body on which is this nut-piece must usually be machined with care, according to complicated techniques so that these elements can come connect properly to each other, which requires special tools, lengthens the time to manufacturing and, as a result, significantly increases the cost of manufacturing devices at the industrial level.
  • the problem that arises then is to propose an ARPF type device improved, easily manufactured and easily connected to secure, in particular to a welding torch, cutting or the like, and which is lower cost to manufacture industrially than existing solutions.
  • ALF non-return type safety device flame arrestor
  • a body traversed by an internal gas passage connecting a first port to a second port, and security means arranged on the gas passage to mitigate any inadvertent return of gas and / or to flashback characterized in that it comprises, in addition, a non-separable nut-ring of said body and free in rotation about the axis of the body, said ring-nut having an upstream portion constricted towards the body by deformation mechanical, and said ring-nut being retained on said body by cooperation of said upstream portion constricted with at least a portion of the body.
  • the invention also relates to a gas pipe or torch comprising a ARPF device according to the invention, as well as the use of such an ARPF device for protect a gas line or torch, especially a manual torch welding, cutting or the like.
  • step c) the mechanical deformation of step c) is done by pressing at cold.
  • the body comprises, on its outer periphery, at least one recess and / or a boss, and in step c), deforms the upstream portion of the ring-nut in such a way that it comes to cooperate with the recess and / or the boss to retain the ring-nut on the body while being free to rotate around of said body.
  • Figures 1 and 2 show two different embodiments of a device flame-back type safety device according to the invention which differ from one another the other by the shape of the connecting portion of the body 1 which carries the inlet port 4 gas.
  • the flame-retardant type safety device comprises a main body 1, of elongated shape and axis A-A, crossed by a gas passage 2 internal connecting a first port 4 to a second port 5.
  • These means comprise, in a manner known per se, a flame filter and a flap means acting as a gas check, as well as other elements, such as return spring, valve seat ...
  • the device also comprises a nut-ring 6 which can not be dissociated from said body and free in rotation about the axis A-A thereof.
  • This nut-ring 6 serves for connecting the device on a welding torch for example or on any other device in front of be protected by such a device.
  • the ring-nut 6 has a downstream portion 8 threaded suitable for coming cooperate by screwing with a complementary threaded portion of the torch or similar.
  • the ring-nut 6 has an upstream portion 7 tightened toward the body 1 by mechanical deformation, that is to say of the upstream end portion 7 of the ring 6.
  • the upstream part 7 has undergone a cold mechanical deformation, of preferably a cold pressing, in radial approximation with respect to the body 1 of in a localized way, to reduce the internal diameter of this part 7 and thus to form a kind of shoulder 10.
  • the ring-nut 6 can be retained on said body 1 by cooperation of this upstream portion 7 tightened comprising the shoulder 10 with at least a portion of the body 1, in particular with one (or more) bosses 9 located at the surface external of the front end of the body 1 carrying the orifice 5, the external diameter of this boss 9 being chosen to be greater than the internal diameter of the portion constricted 7 by mechanical deformation, which implies that the shoulder 10 then comes in abutment, via its front face 10a, against said boss 9 and therefore that the ring-nut 6 does not can be dissociated from the body 1.
  • the boss 9 is constituted in FIG. 5 by a metal collar protrusion with respect to the outer peripheral surface of the body 1, this collar being able to be continuous on the entire periphery of the surface or be interrupted in places. Good heard, the boss or bosses 9 can also take other forms, for example be formed of several cleats or stops distributed around the outer periphery of the body 1.
  • this recess will be preferably consisting of a groove peripheral to said surface. In this case, will ensure that the shoulder 10 has a height sufficient to be housed in said groove coming there, again, in abutment via its front face 10a, as explained above.
  • the nut-ring 6 is made of a metal or metal alloy deformable, for example brass, copper, steel ...

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighters Containing Fuel (AREA)

Abstract

The device has an internal gas passage that passes through a body (1) and connects two orifices (4, 5). A damper filter is arranged in the internal gas passage. A thrust nut (6) that is formed integral with the body rotates freely around an axis of the body. The thrust nut has an upstream portion (7) that cooperates with a part of the body and is retained on the body. Independent claims are also included for the following: (a) an application of a safety device (b) a method of manufacturing a safety device.

Description

La présente invention porte sur un dispositif de sécurité de type anti-retour pare-flamme (ARPF), en particulier destiné à équiper des canalisations de gaz, telles que les conduits de gaz combustible et/ou comburant d'un chalumeau de soudage, coupage ou analogue, ainsi que son procédé de fabrication.The present invention relates to a safety device of the type anti-return flame arrestor (ARPF), in particular intended to equip gas pipelines, such as fuel gas and / or combustion gas ducts of a welding torch, cutting or analogue, as well as 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 NF EN 730.ARPF type safety devices for combustible gases and Oxidizers, such as oxygen, are described in particular in the NF EN 730 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 situées en amont du dispositif de type ARPF.ARPF safety devices protect the gas circuits against gas flow in the opposite direction to that desired, commonly referred to as the slow return of gas, and against the spread or rise of a flame or a return of flame, especially in the pipes 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 pressure downstream gas comes to be 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 flashback is conventionally prevented by a porous filter, generally obtained by sintering grains of stainless steel, which does not offer gas which crosses that openings of section lower than that which can cross a flame without extinguishing.

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.ARPF devices are very efficient and widely used particularly in the field of welding, cutting or the like where they are classically mounted upstream of the torches, that is to say on the side of the arrival of gas pipes supplying the torches with combustible and oxidizing gas.

Actuellement, la fixation d'un dispositif de sécurité de type ARPF sur le manche d'un chalumeau oxy-gaz par exemple, se fait par vissage d'une partie d'extrémité taraudée du dispositif sur l'entrée filetée du chalumeau, l'autre extrémité du dispositif ARPF étant raccordée à la canalisation de gaz servant à alimenter le chalumeau en gaz combustible ou comburant (oxygène). Currently, the attachment of an ARPF type safety device on the handle of an oxy-gas torch for example, is done by screwing an end portion tapped the device on the threaded inlet of the torch, the other end of the device ARPF being connected to the gas pipe for supplying the gas torch combustible or oxidant (oxygen).

Toutefois, les moyens de fixation équipant actuellement les dispositifs de sécurité ARPF existants ne sont pas pratiques à utiliser et/ou sont d'architecture complexe, donc de coût élevé à fabriquer.However, the means of attachment currently equipping the devices of existing ARPF security are impractical to use and / or are architectural complex, so expensive to manufacture.

En particulier, dans les dispositifs de l'art antérieur, la pièce-écrou servant à fixer le dispositif ARPF au chalumeau, ainsi que le corps de dispositif ARPF sur lequel est fixée ou retenue cette pièce-écrou doivent habituellement être usinés avec soin, selon des techniques compliquées pour que ces éléments puissent venir se raccorder correctement l'un à l'autre, ce qui nécessite des outils spéciaux, rallonge le temps de fabrication et engendre, de ce fait, une augmentation notable du coût de fabrication des dispositifs au plan industriel.In particular, in the devices of the prior art, the piece-nut serving to fix torch ARPF device, as well as the ARPF device body on which is this nut-piece must usually be machined with care, according to complicated techniques so that these elements can come connect properly to each other, which requires special tools, lengthens the time to manufacturing and, as a result, significantly increases the cost of manufacturing devices at the industrial level.

Le problème qui se pose alors est de proposer un dispositif de type ARPF amélioré pouvant être facilement fabriqué et aisément raccordé à un appareil à sécuriser, en particulier à un chalumeau de soudage, coupage ou similaire, et qui soit de coût moindre à fabriquer au plan industriel que les solutions existantes.The problem that arises then is to propose an ARPF type device improved, easily manufactured and easily connected to secure, in particular to a welding torch, cutting or the like, and which is lower cost to manufacture industrially than existing solutions.

La solution de l'invention est alors un dispositif de sécurité de type anti-retour pare-flamme (ARF) comprenant un corps traversé par un passage de gaz interne reliant un premier orifice à un second orifice, et des moyens de sécurité agencés sur le passage de gaz permettant de pallier tout retour intempestif de gaz et/ou de parer toute rentrée de flamme, caractérisé en ce qu'il comporte, en outre, une bague-écrou non-dissociable dudit corps et libre en rotation autour de l'axe du corps, ladite bague-écrou comportant une portion amont resserrée en direction du corps par déformation mécanique, et ladite bague-écrou étant retenue sur ledit corps par coopération de ladite portion amont resserrée avec au moins une partie du corps.The solution of the invention is then a non-return type safety device flame arrestor (ARF) comprising a body traversed by an internal gas passage connecting a first port to a second port, and security means arranged on the gas passage to mitigate any inadvertent return of gas and / or to flashback, characterized in that it comprises, in addition, a non-separable nut-ring of said body and free in rotation about the axis of the body, said ring-nut having an upstream portion constricted towards the body by deformation mechanical, and said ring-nut being retained on said body by cooperation of said upstream portion constricted with at least a portion of the body.

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

  • la bague-écrou comporte une portion aval taraudée permettant son raccordement par vissage à l'appareil à sécuriser, en particulier à un chalumeau de soudage ou analogue, ou à une canalisation de gaz.
  • la bague-écrou est en un métal ou alliage métallique, notamment du laiton, du cuivre ou tout métal ou alliage analogue.
  • la portion amont a subi un resserrement par déformation mécanique à froid, de préférence par pressage à froid.
  • le corps comporte, sur sa périphérie externe, au moins un évidement et/ou un bossage, et la portion amont coopère avec ledit évidement et/ou bossage de manière à retenir la bague-écrou sur le corps.
  • il comporte un filtre pare-flamme et un moyen à clapet faisant office d'anti-retour de gaz étant agencés sur ledit passage de gaz.
  • la portion amont de la bague-écrou, resserrée en direction du corps, forme un épaulement, lequel épaulement vient coopérer avec le bossage porté par le corps, de préférence en prenant appui sur celui-ci, en empêchant ainsi une séparation de la bague-écrou et du corps.
  • le diamètre interne de la bague-écrou au niveau de l'épaulement est inférieur au diamètre externe du bossage porté par le corps.
As the case may be, the device of the invention may comprise one or more of the following characteristics:
  • the ring-nut comprises a threaded downstream portion allowing its connection by screwing to the device to be secured, in particular to a welding torch or the like, or to a gas pipe.
  • the ring-nut is made of a metal or metal alloy, especially brass, copper or any metal or similar alloy.
  • the upstream portion has been tightened by cold mechanical deformation, preferably by cold pressing.
  • the body comprises, on its outer periphery, at least one recess and / or a boss, and the upstream portion cooperates with said recess and / or boss so as to retain the nut-ring on the body.
  • it comprises a flame filter and a valve means acting as gas anti-return being arranged on said gas passage.
  • the upstream portion of the ring nut, tightened towards the body, forms a shoulder, which shoulder cooperates with the boss carried by the body, preferably by bearing on it, thus preventing a separation of the ring- nut and body.
  • the internal diameter of the ring-nut at the shoulder is less than the outer diameter of the boss carried by the body.

L'invention concerne aussi une canalisation de gaz ou chalumeau comportant un dispositif ARPF selon l'invention, ainsi que l'utilisation d'un tel dispositif ARPF pour protéger une canalisation de gaz ou un chalumeau, en particulier un chalumeau manuel de soudage, coupage ou analogue.The invention also relates to a gas pipe or torch comprising a ARPF device according to the invention, as well as the use of such an ARPF device for protect a gas line or torch, especially a manual torch welding, cutting or the like.

L'invention concerne de plus un procédé de fabrication d'un dispositif de sécurité de type anti-retour pare-flamme, dans lequel on procède selon les étapes, de préférence successives, suivantes :

  • a) on amène le corps d'un dispositif de sécurité de type anti-retour pare-flamme selon l'invention,
  • b) on agence une bague-écrou autour d'au moins une partie dudit corps à la manière d'un manchon, ladite bague-écrou comportant une portion amont située en regard d'au moins une partie de la surface périphérique externe dudit corps,
  • c) on opère une déformation mécanique de ladite portion amont de ladite bague-écrou de manière à la resserrer en direction du corps et jusqu'à obtenir une bague-écrou non-dissociable du corps et libre en rotation autour de l'axe du corps, ladite bague-écrou étant retenue sur ledit corps par coopération de ladite portion amont resserrée avec au moins une partie du corps.
    • The invention furthermore relates to a method for manufacturing a safety device of the flame arrestor type, in which the following steps, preferably successive steps, are carried out:
  • a) the body is provided with a safety device of flame retardant type according to the invention,
  • b) a ring-nut is arranged around at least a part of said body in the manner of a sleeve, said ring-nut comprising an upstream portion situated opposite at least a part of the external peripheral surface of said body,
  • c) a mechanical deformation of said upstream portion of said ring-nut is carried out so as to tighten it towards the body and to obtain a ring-nut which is non-separable from the body and free to rotate about the axis of the body said ring-nut being retained on said body by cooperation of said tightened upstream portion with at least a part of the body.

    • De préférence, la déformation mécanique de l'étape c) se fait par pressage à froid.Preferably, the mechanical deformation of step c) is done by pressing at cold.

    Avantageusement, le corps comporte, sur sa périphérie externe, au moins un évidement et/ou un bossage, et à l'étape c), on déforme la portion amont de la bague-écrou de manière telle que celle-ci vienne coopérer avec l'évidement et/ou le bossage de manière à retenir la bague-écrou sur le corps tout en étant libre en rotation autour dudit corps.Advantageously, the body comprises, on its outer periphery, at least one recess and / or a boss, and in step c), deforms the upstream portion of the ring-nut in such a way that it comes to cooperate with the recess and / or the boss to retain the ring-nut on the body while being free to rotate around of said body.

    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 et 2 montrent deux modes de réalisation différents d'un dispositif de sécurité de type anti-retour pare-flamme selon l'invention qui se différencient l'un de l'autre par la forme de la partie de raccordement du corps 1 qui porte l'orifice 4 d'entrée de gaz.Figures 1 and 2 show two different embodiments of a device flame-back type safety device according to the invention which differ from one another the other by the shape of the connecting portion of the body 1 which carries the inlet port 4 gas.

    Comme détaillé sur la figure 5, quel que soit le mode de réalisation considéré, le dispositif de sécurité de type anti-retour pare-flamme 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.As detailed in FIG. 5, whatever the embodiment considered, the flame-retardant type safety device according to the invention comprises a main body 1, of elongated shape and axis A-A, crossed by a gas passage 2 internal connecting a first port 4 to a second port 5.

    En fonctionnement normal, le gaz circule donc normalement dans le dispositif dans le sens allant de l'orifice 4 vers l'orifice 5.In normal operation, the gas therefore circulates normally in the device in the direction from port 4 to port 5.

    Des moyens de sécurité classiques et 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 security means and able to perform the functions of anti-return gas and flame arrestors, are arranged on the gas passage 2, inside the body 1.

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

    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.The device also comprises a nut-ring 6 which can not be dissociated from said body and free in rotation about the axis A-A thereof.

    Cette bague-écrou 6, détaillée sur les figures 3 et 4, sert au raccordement du dispositif sur un chalumeau de soudage par exemple ou sur tout autre appareil devant être protégé par un tel dispositif.This nut-ring 6, detailed in FIGS. 3 and 4, serves for connecting the device on a welding torch for example or on any other device in front of be protected by such a device.

    En effet, la bague-écrou 6 comporte une portion aval 8 taraudée apte à venir coopérer par vissage avec une partie filetée complémentaire du chalumeau ou analogue.Indeed, the ring-nut 6 has a downstream portion 8 threaded suitable for coming cooperate by screwing with a complementary threaded portion of the torch or similar.

    Pour assurer le maintien de la bague-écrou 6 sur le corps 1 du dispositif ARPF, la bague-écrou 6 comporte une portion amont 7 resserrée en direction du corps 1 par déformation mécanique, c'est-à-dire de la partie d'extrémité 7 amont de la bague 6.To ensure the maintenance of the nut-ring 6 on the body 1 of the ARPF device, the ring-nut 6 has an upstream portion 7 tightened toward the body 1 by mechanical deformation, that is to say of the upstream end portion 7 of the ring 6.

    Autrement dit, la partie amont 7 a subi une déformation mécanique à froid, de préférence un pressage à froid, en rapprochement radial par rapport au corps 1 de manière réduire, de façon localisée, le diamètre interne de cette partie 7 et former ainsi une sorte d'épaulement 10.In other words, the upstream part 7 has undergone a cold mechanical deformation, of preferably a cold pressing, in radial approximation with respect to the body 1 of in a localized way, to reduce the internal diameter of this part 7 and thus to form a kind of shoulder 10.

    Ainsi, la bague-écrou 6 peut être retenue sur ledit corps 1 par coopération de cette portion amont 7 resserrée comportant l'épaulement 10 avec au moins une partie du corps 1, en particulier avec un (ou plusieurs) bossage 9 situé au niveau de la surface externe de l'extrémité avant du corps 1 portant l'orifice 5, le diamètre externe de ce bossage 9 étant choisi de manière à être supérieur au diamètre interne de la portion resserrée 7 par déformation mécanique, ce qui implique que l'épaulement 10 vient alors en butée, via sa face avant 10a, contre ledit bossage 9 et donc que la bague-écrou 6 ne peut être dissociée du corps 1.Thus, the ring-nut 6 can be retained on said body 1 by cooperation of this upstream portion 7 tightened comprising the shoulder 10 with at least a portion of the body 1, in particular with one (or more) bosses 9 located at the surface external of the front end of the body 1 carrying the orifice 5, the external diameter of this boss 9 being chosen to be greater than the internal diameter of the portion constricted 7 by mechanical deformation, which implies that the shoulder 10 then comes in abutment, via its front face 10a, against said boss 9 and therefore that the ring-nut 6 does not can be dissociated from the body 1.

    Le bossage 9 est constitué, sur la figure 5, d'une collerette en métal faisant saillie par rapport à la surface périphérique externe du corps 1, cette collerette pouvant être continue sur toute la périphérie de la surface ou être interrompue par endroits. Bien entendu, le ou les bossages 9 peuvent également revêtir d'autres formes, par exemple être formés de plusieurs taquets ou butées répartis autour de la périphérie externe du corps 1. The boss 9 is constituted in FIG. 5 by a metal collar protrusion with respect to the outer peripheral surface of the body 1, this collar being able to be continuous on the entire periphery of the surface or be interrupted in places. Good heard, the boss or bosses 9 can also take other forms, for example be formed of several cleats or stops distributed around the outer periphery of the body 1.

    Par ailleurs, lorsqu'on choisira plutôt de réaliser au moins un évidement (au lieu d'un bossage en saillie) sur la périphérie du corps 1, alors cet évidement sera préférentiellement constitué d'une gorge périphérique à ladite surface. Dans ce cas, on veillera à ce que l'épaulement 10 ait une hauteur suffisante pour venir se loger dans ladite gorge en y venant, là encore, en butée via sa face avant 10a, comme expliqué ci-avant.Moreover, when choosing instead to make at least one recess (instead protruding boss) on the periphery of the body 1, then this recess will be preferably consisting of a groove peripheral to said surface. In this case, will ensure that the shoulder 10 has a height sufficient to be housed in said groove coming there, again, in abutment via its front face 10a, as explained above.

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

    Grâce au procédé de fabrication de l'invention, lequel met en oeuvre un tel pressage à froid, on peut facilement produire des dispositifs ARPF selon l'invention de manière simple, facile à mettre en oeuvre au plan industriel et à coût très inférieur à celui des dispositifs de l'art antérieur.Thanks to the manufacturing method of the invention, which implements such cold pressing, one can easily produce ARPF devices according to the invention of simple way, easy to implement industrially and at a much lower cost than that of the devices of the prior art.

    Claims (13)

    Dispositif de sécurité de type anti-retour pare-flamme comprenant un corps (1) traversé par un passage de gaz (2) interne reliant un premier orifice (4) à un second orifice (5), et des moyens de sécurité agencés sur le passage de gaz (2), caractérisé en ce qu'il comporte, en outre, une bague-écrou (6) non-dissociable dudit corps (1) et libre en rotation autour de l'axe du corps (1), ladite bague-écrou (6) comportant une portion amont (7) resserrée en direction du corps (1) par déformation mécanique, et ladite bague-écrou (6) étant retenue sur ledit corps (1) par coopération de ladite portion amont (7) resserrée avec au moins une partie du corps (1).Flameless anti-return type safety device comprising a body (1) traversed by an internal gas passage (2) connecting a first orifice (4) to a second orifice (5), and safety means arranged on the gas passage (2), characterized in that it further comprises a nut-ring (6) which can not be dissociated from said body (1) and is free to rotate about the axis of the body (1), said ring nut (6) having an upstream portion (7) constricted towards the body (1) by mechanical deformation, and said ring-nut (6) being retained on said body (1) by cooperation of said upstream portion (7) constricted with at least a part of the body (1). Dispositif selon la revendication 1, caractérisé en ce que la bague-écrou (6) comporte une portion aval (8) taraudée.Device according to claim 1, characterized in that the nut-ring (6) comprises a threaded downstream portion (8). Dispositif selon la revendication 1 ou 2, caractérisé en ce que la bague-écrou (6) est en un métal ou alliage métallique.Device according to claim 1 or 2, characterized in that the nut-ring (6) is made of a metal or metal alloy. Dispositif selon les revendications 1 à 3, caractérisé en ce que la portion amont (7) a subi un resserrement par déformation mécanique à froid, de préférence par pressage à froid.Device according to claims 1 to 3, characterized in that the upstream portion (7) has undergone a tightening by mechanical deformation to cold, preferably by cold pressing. Dispositif selon les revendications 1 à 4, caractérisé en ce que le corps (1) comporte, sur sa périphérie externe, au moins un évidement et/ou un bossage (9), et la portion amont (7) coopère avec ledit évidement et/ou bossage (9) de manière à retenir la bague-écrou (6) sur le corps (1).Device according to claims 1 to 4, characterized in that the body (1) has, on its outer periphery, at least one recess and / or boss (9), and the upstream portion (7) cooperates with said recess and / or boss (9) so as to retain the nut-ring (6) on the body (1). Dispositif selon l'une des revendications 1 à 5, caractérisé en ce qu'il comporte un filtre pare-flamme et un moyen à clapet faisant office d'anti-retour de gaz étant agencés sur ledit passage (2) de gaz. Device according to one of claims 1 to 5, characterized in that it comprises a flame filter and a valve means acting as gas anti-return being arranged on said passage (2) of gas. Dispositif selon la revendication 1 à 6, caractérisé en ce que la portion amont (7) de la bague-écrou (6) resserrée en direction du corps (1) forme un épaulement (10).Device according to claim 1 to 6, characterized in that the upstream portion (7) of the nut ring (6) tightened towards the body (1) forms a shoulder (10). Dispositif selon la revendication 1 à 7, caractérisé en ce que le diamètre interne de la bague-écrou (6) au niveau de l'épaulement (10) est inférieur au diamètre externe du bossage (9) porté par le corps (1).Device according to claim 1 to 7, characterized in that the internal diameter of the nut-ring (6) at the shoulder (10) is smaller than the external diameter of the boss (9) carried by the body (1). Canalisation de gaz ou chalumeau comportant un dispositif de sécurité selon l'une des revendications 1 à 8.Gas pipeline or torch 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 ou un chalumeau, en particulier 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 line or torch, particularly a blowtorch manual welding, cutting or the like. Procédé de fabrication d'un dispositif de sécurité de type anti-retour pare-flamme, dans lequel on procède selon les étapes, de préférence successives, suivantes a) on amène le corps (1) d'un dispositif de sécurité de type anti-retour pare-flamme selon l'une des revendications 1 à 8, b) on agence une bague-écrou (6) autour d'au moins une partie dudit corps (1) à la manière d'un manchon, ladite bague-écrou (6) comportant une portion amont (7) située en regard d'au moins une partie de la surface périphérique externe dudit corps (1), c) on opère une déformation mécanique de ladite portion amont (7) de ladite bague-écrou (6) de manière à la resserrer en direction du corps (1) et jusqu'à obtenir une bague-écrou (6) non-dissociable du corps (1) et libre en rotation autour de l'axe du corps (1), ladite bague-écrou (6) étant retenue sur ledit corps (1) par coopération de ladite portion amont (7) resserrée avec au moins une partie du corps (1). A method of manufacturing a safety device of flame retardant type, in which is carried out according to the steps, preferably successive, following a) the body (1) is provided with a flame retardant type safety device according to one of claims 1 to 8, b) a ring-nut (6) is arranged around at least a part of said body (1) in the manner of a sleeve, said ring-nut (6) comprising an upstream portion (7) situated opposite at least a portion of the outer peripheral surface of said body (1), c) a mechanical deformation of said upstream portion (7) of said nut-ring (6) is carried out so as to tighten it towards the body (1) and until a nut-ring (6) is obtained which can not be dissociated from the body (1) and free to rotate about the axis of the body (1), said ring-nut (6) being retained on said body (1) by cooperation of said upstream portion (7) constricted with at least a portion of the body (1). Procédé de fabrication selon la revendication 11, caractérisé en ce que la déformation mécanique de l'étape c) se fait par pressage à froid.Manufacturing method according to claim 11, characterized in that the mechanical deformation of step c) is by cold pressing. Procédé de fabrication selon l'une des revendications 11 ou 12, caractérisé en ce que le corps (1) comporte, sur sa périphérie externe, au moins un évidement et/ou un bossage (9), et à l'étape c), on déforme la portion amont (7) de la bague-écrou (6) de manière telle que celle-ci vienne coopérer avec l'évidement et/ou le bossage (9) pour retenir la bague-écrou (6) sur le corps (1) tout en étant libre en rotation autour dudit corps (1).Manufacturing method according to one of claims 11 or 12, characterized in that the body (1) comprises, on its outer periphery, at least one recess and / or a boss (9), and in step c), the upstream portion (7) of the nut-ring (6) is deformed in such a way that it comes to cooperate with the recess and / or the boss (9) to retain the nut-ring (6) on the body ( 1) while being free to rotate around said body (1).
    EP03292162A 2003-09-03 2003-09-03 Flashback arresting device with cold deformed swivel nut Ceased EP1512910A1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    EP03292162A EP1512910A1 (en) 2003-09-03 2003-09-03 Flashback arresting device with cold deformed swivel nut

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP03292162A EP1512910A1 (en) 2003-09-03 2003-09-03 Flashback arresting device with cold deformed swivel nut

    Publications (1)

    Publication Number Publication Date
    EP1512910A1 true EP1512910A1 (en) 2005-03-09

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    EP03292162A Ceased EP1512910A1 (en) 2003-09-03 2003-09-03 Flashback arresting device with cold deformed swivel nut

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    EP (1) EP1512910A1 (en)

    Cited By (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1777455A1 (en) 2005-10-19 2007-04-25 FRO S.p.A. Flashback arrestor safety device for mounting without tooling
    US20140030666A1 (en) * 2012-07-30 2014-01-30 Victor Equipment Company Flashback arrestor
    IT201800005168A1 (en) * 2018-05-08 2019-11-08 FITTING ELEMENT AND CONNECTION KIT
    CN110966593A (en) * 2018-09-29 2020-04-07 爱烙达股份有限公司 Gas combustion device

    Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2810631A (en) * 1953-08-24 1957-10-22 William A Kanenbley Flash arrester
    GB2181530A (en) * 1985-09-10 1987-04-23 Butcher Brothers Limited Flashback arrestor
    FR2666179A1 (en) * 1990-08-24 1992-02-28 Spinner Georg PROCESS FOR MOUNTING THE FIXING COLLAR OF A PLUG CONNECTOR.
    GB2272504A (en) * 1992-11-11 1994-05-18 Trevor Thomas Jenkins Flashback arrestor
    EP1033516A1 (en) * 1999-03-01 2000-09-06 Alessandro Piana Valve for regulating fluids

    Patent Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2810631A (en) * 1953-08-24 1957-10-22 William A Kanenbley Flash arrester
    GB2181530A (en) * 1985-09-10 1987-04-23 Butcher Brothers Limited Flashback arrestor
    FR2666179A1 (en) * 1990-08-24 1992-02-28 Spinner Georg PROCESS FOR MOUNTING THE FIXING COLLAR OF A PLUG CONNECTOR.
    GB2272504A (en) * 1992-11-11 1994-05-18 Trevor Thomas Jenkins Flashback arrestor
    EP1033516A1 (en) * 1999-03-01 2000-09-06 Alessandro Piana Valve for regulating fluids

    Cited By (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1777455A1 (en) 2005-10-19 2007-04-25 FRO S.p.A. Flashback arrestor safety device for mounting without tooling
    US20140030666A1 (en) * 2012-07-30 2014-01-30 Victor Equipment Company Flashback arrestor
    IT201800005168A1 (en) * 2018-05-08 2019-11-08 FITTING ELEMENT AND CONNECTION KIT
    WO2019215548A1 (en) * 2018-05-08 2019-11-14 Valvosanitaria Bugatti S.P.A. Fitting element and connection kit
    CN110966593A (en) * 2018-09-29 2020-04-07 爱烙达股份有限公司 Gas combustion device
    CN110966593B (en) * 2018-09-29 2021-07-09 爱烙达股份有限公司 Gas combustion device

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