FR2729453A1 - Connector for sealingly connecting fluid pipes - Google Patents

Connector for sealingly connecting fluid pipes Download PDF

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Publication number
FR2729453A1
FR2729453A1 FR9500446A FR9500446A FR2729453A1 FR 2729453 A1 FR2729453 A1 FR 2729453A1 FR 9500446 A FR9500446 A FR 9500446A FR 9500446 A FR9500446 A FR 9500446A FR 2729453 A1 FR2729453 A1 FR 2729453A1
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France
Prior art keywords
nut
seal
segment
end piece
smooth
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
FR9500446A
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French (fr)
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FR2729453B1 (en
Inventor
Michel Emin
Roger Martin
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.)
Electricite de France SA
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Electricite de France SA
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Publication date
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Priority to FR9500446A priority Critical patent/FR2729453B1/en
Publication of FR2729453A1 publication Critical patent/FR2729453A1/en
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Publication of FR2729453B1 publication Critical patent/FR2729453B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
    • F16L41/10—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe the extremity of the pipe being screwed into the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/04—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection
    • F16L19/048—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection specially adapted for use with attachments, e.g. reduction units, T-pieces, bends or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/008—Branching pipes; Joining pipes to walls for connecting a measuring instrument

Abstract

A pipe (2) is connected to the body of an apparatus (3) by a connector comprising a ferrule (4) fixed to the pipe. The ferrule has a conical thread (4b) which is screwed into a hole (8) in the apparatus body which has a complementary conical tapping (8a). The ferrule has, between its conical thread and the pipe connecting zone, a smooth cylindrical section (4c) of diameter equal to the largest diameter of the conical thread. It also has a threaded cylindrical segment (4d) of diameter greater than that of the smooth segment on which is screwed a nut (9). The nut has a shoulder (9a) whose bore (9'a) has a diameter equal to that of the smooth segment. A sealing joint (13) is compressed between a support surface on the apparatus body and the front face (9') of the nut. A second joint (11) is compressed between the nut internal shoulder and the ferrule smooth segment.

Description

La presente invention concerne un dispositif de raccordement étanche d'une canalisation de fluide à un corps d'appareil, tel qu'un capteur de mesure ou de contrôle. The present invention relates to a sealed connection device for a fluid pipe to an appliance body, such as a measurement or control sensor.

On connaît, actuellement, des dispositifs de raccordement étanche comprenant, notamment, un embout solidaire de la canalisation et pourvu d'un filetage conique destiné à être vissé dans un orifice du corps d' appareil pourvu dun taraudage conique complémentaire du filetage conique de l'embout. There are currently known sealed connection devices comprising, in particular, an end piece integral with the pipe and provided with a conical thread intended to be screwed into an orifice of the device body provided with a conical thread complementary to the conical thread of the mouthpiece.

Un dispositif de ce type a été représenté sur la figure 1, dans le cas d'un raccordement à un capteur de mesure de pression CM dont on a représenté l'enceinte et la membrane M. Sur cette figure 1, l'embout a été référence par E, l'orifice taraudé du capteur par O et la canalisation dont l'embout E est solidaire par C. A device of this type has been shown in FIG. 1, in the case of a connection to a pressure measurement sensor CM of which the enclosure and the membrane M have been shown. In this FIG. 1, the end piece has been reference by E, the threaded orifice of the sensor by O and the pipe whose tip E is secured by C.

La conicité du filetage de l'embout E et du taraudage de l'orifice O interdit l'utilisation de joints d'étanchéité classiques en raison de l'incertitude de la profondeur de pénétration de l'embout E dans l'orifice .  The taper of the thread of the end piece E and the thread of the orifice O prohibits the use of conventional seals due to the uncertainty of the depth of penetration of the end piece E into the orifice.

Aussi, letanchdite entre l'embout fileté E et l'orifice taraudé O est généralement obtenue par une pâte spéciale appliquee préalablement sur l'embout fileté E ou par un ruban en polytétrafluoréthylène ou similaire dont on entoure préalablement l'embout fileté E et dont la présence vise à interdire, au fluide véhiculé, de pénétrer dans la rampe helicoïdale en bout de filet.Also, the gap between the threaded end piece E and the threaded orifice O is generally obtained by a special paste applied beforehand on the threaded end piece E or by a polytetrafluoroethylene tape or the like with which the threaded end piece E is previously surrounded and the presence is intended to prevent the fluid conveyed from entering the helical ramp at the end of the net.

Si de tels dispositifs procurent l'étanchéité souhaitée, par contre, ils présentent le grave inconvénient de polluer le fluide par les particules de pâte ou de ruban. If such devices provide the desired seal, on the other hand, they have the serious disadvantage of polluting the fluid by the particles of paste or ribbon.

Dans certains cas, la pâte utilisée est incompatible avec le fluide, la pression, la température. In some cases, the paste used is incompatible with the fluid, the pressure, the temperature.

En outre, il n'est pas certain qu'avec le vieillissement de la pâte ou du ruban, ces dispositifs conservent 1 'étanchéité désirée. In addition, it is not certain that with the aging of the dough or of the ribbon, these devices maintain the desired seal.

Egalement, 1 'étanchéité réalisée par la pâte ou le ruban n'est pas contrôlable. Also, the seal produced by the paste or the ribbon is not controllable.

Par ailleurs, rien n'est prévu pour assurer le blocage de l'embout fileté dans l'orifice taraudé, ce qui, en présence de vibrations, peut permettre leur dés accouplement .  Furthermore, nothing is provided to block the threaded end piece in the threaded orifice, which, in the presence of vibrations, can allow them to be uncoupled.

La présente invention vise à remédier à tous ces inconvénients. The present invention aims to remedy all these drawbacks.

A cet effet, le dispositif qu'elle propose est du type précité et son embout présente, entre son filetage conique et la zone de raccordement de la canalisation, et en partant du premier en direction de la seconde, d'une part, un segment cylindrique lisse d'un diamètre sensiblement égal au grand diamètre du filetage conique, et, d'autre part, un segment cylindrique fileté d'un diamètre supérieur à celui du segment lisse et sur lequel est vissé un écrou qui presente, au droit du segment lisse de l'embout, un épaulement dont l'alésage présente un diamètre sensiblement égal à celui du segment lisse ; un premier joint d'étanchéité étant comprimé entre un plan d'appui que présente le corps de l'appareil recevant ce dispositif et la face frontale de l'écrou, tandis qu'un deuxième joint d'étanchéité est comprimé entre l'épaulement interne de l'écrou et le segment lisse de l'embout.  To this end, the device which it offers is of the aforementioned type and its end piece has, between its conical thread and the connection area of the pipe, and starting from the first in the direction of the second, on the one hand, a segment smooth cylindrical with a diameter substantially equal to the large diameter of the conical thread, and, on the other hand, a threaded cylindrical segment with a diameter greater than that of the smooth segment and onto which is screwed a nut which presents, in line with the segment smooth end piece, a shoulder whose bore has a diameter substantially equal to that of the smooth segment; a first seal being compressed between a support plane presented by the body of the device receiving this device and the front face of the nut, while a second seal is compressed between the internal shoulder of the nut and the smooth segment of the end piece.

Dans un tel dispositif, le filetage conique permet de positionner l'embout tandis que le serrage de l'écrou met en contrainte les filets coniques et compresse les joints. In such a device, the conical thread makes it possible to position the end piece while the tightening of the nut stresses the conical threads and compresses the joints.

Ainsi, en se bloquant par serrage contre la surface d'appui du corps de l'appareil l'écrou assure une étanchéité parfaite entre l'embout et le corps d'appareil en même temps qu'il joue le rôle de contre écrou et s'oppose au desaccouplement de 1 'embout et dudit corps d ' appareil, meme en présence de vibrations. Thus, by locking by tightening against the bearing surface of the body of the device, the nut ensures a perfect seal between the end piece and the body of the device at the same time as it plays the role of lock nut and s 'opposes the uncoupling of the end piece and said device body, even in the presence of vibrations.

En outre, le raccord réalise est propre et non polluant à la fois pour la canalisation et 1 'appareil sur lesquels il est monté, et pour l'environnement externe dans lequel il se trouve. In addition, the fitting produced is clean and non-polluting both for the pipe and the device on which it is mounted, and for the external environment in which it is located.

On notera également qu'un tel dispositif de raccordement présente 1 'avantage de pouvoir être adapte, par un simple changement du type de joint utilisé, a des conditions de fonctionnement très variées : hautes ou basses pressions, hautes ou basses températures, fonctionnement sous irradiation, etc. It will also be noted that such a connection device has the advantage of being able to be adapted, by a simple change in the type of seal used, to very varied operating conditions: high or low pressures, high or low temperatures, operation under irradiation , etc.

En particulier, pour une utilisation sous haute pression (jusqn'à 350 bars ou plus) ou haute température (jusqu'a 3500C ou plus), on utilisera avantageusement des joints en graphite. In particular, for use under high pressure (up to 350 bars or more) or high temperature (up to 3500C or more), graphite seals will advantageously be used.

Pour une bonne tenue sous irradiation, on utilisera avantageusement des joints en EPD.  For good resistance under irradiation, EPD seals will advantageously be used.

Dans un mode de réalisation particulièrement avantageux, l'écrou présente une portée frontale par laquelle il vient en contact et prend appui sur le plan d'appui précité que présente le corps de appareil, lors de son serrage par rapport à 1 'embout, le premier joint d'étanchéité étant reçu dans un logement annulaire du corps de l'appareil et/ou de la face frontale de l'écrou.  In a particularly advantageous embodiment, the nut has a front surface by which it comes into contact and is supported on the abovementioned support plane that has the device body, when it is tightened with respect to the end piece, the first seal being received in an annular housing of the body of the device and / or of the front face of the nut.

Avec une telle structure, l'étanchéité du raccord est contrôlable et aisément reproductible : pour un type de joints et une rugosité de plan d'appui donnés, elle est uniquement fonction du couple de serrage sur l'écrou et elle ne varie pas dans le temps. With such a structure, the tightness of the fitting is controllable and easily reproducible: for a given type of joints and roughness of the support plane, it is solely a function of the torque on the nut and it does not vary in the time.

L'appui de la portée frontale de l'écrou sur le plan d'appui que présente l'appareil confère en outre au raccord une très bonne tenue statique : la portée contribue à soutenir le dispositif de raccordement et la canalisation par rapport à l'appareil, en s'opposant notamment aux déformations et modifications de position que 1 'embout à extrémité conique pourrait subir sous l'effet de la charge de la canalisation. The support of the front face of the nut on the support surface presented by the device also gives the fitting a very good static hold: the face helps to support the connection device and the pipe with respect to the device, in particular opposing the deformations and changes in position that one tip conical end could undergo the effect of the load of the pipe.

D'autres caractéristiques et avantages de l'invention ressortiront encore de la description qui suit. Cette description est purement illustrative et non limitative. Elle doit être lue en regard des dessins annexés sur lesquels
la figure 1, qui a déjà été discutée, est une représentation schématique d'un dispositif de raccordement conforme à l'art antérieur, monté sur un capteur de pression
la figure 2 est une vue de côté en élévation, avec demi-coupe axiale, illustrant une première forme d'exécution de ce dispositif
les figures 3 et 4 sont des vues similaires à la figure 2 illustrant deux variantes de réalisation possibles.Other characteristics and advantages of the invention will emerge from the description which follows. This description is purely illustrative and not limiting. It should be read in conjunction with the accompanying drawings on which
Figure 1, which has already been discussed, is a schematic representation of a connection device according to the prior art, mounted on a pressure sensor
Figure 2 is a side elevation view, with axial half-section, illustrating a first embodiment of this device
Figures 3 and 4 are views similar to Figure 2 illustrating two possible embodiments.

Le dispositif de l'invention vise à permettre le raccordement étanche d'une canalisation 2, dans laquelle est véhicule un fluide à l'état gazeux ou liquide à un corps d'appareil 3 (capteur de mesure de pression par exemple) partiellement représente sur le dessin. The device of the invention aims to allow the tight connection of a pipe 2, in which is carried a fluid in the gaseous or liquid state to a device body 3 (pressure measurement sensor for example) partially represented on the drawing.

A cet effet, la canalisation 2 est raccordée, de façon étanche à un embout 4 présentant, du côte destiné à recevoir la canalisation 2, un filetage cylindrique 4a sur lequel est vissé un écrou épaulé 5 permettant de serrer le collet 2a dont est pourvue l'extrémité considérée de la canalisation 2 contre la face frontale 4'a du segment taraudé 4a de l'embout 4, avec compression, entre le collet 2a de la canalisation 2 et la face frontale 4'a de l'embout 4, d'un joint d'étanchéité torique 6 logé dans une gorge annulaire 7 ménagée dans ladite face frontale 4'a de 1embout 4. To this end, the pipe 2 is connected, in a leaktight manner to a nozzle 4 having, on the side intended to receive the pipe 2, a cylindrical thread 4a on which is screwed a shouldered nut 5 making it possible to tighten the collar 2a which is provided with the 'considered end of the pipe 2 against the front face 4'a of the threaded segment 4a of the end piece 4, with compression, between the collar 2a of the pipe 2 and the front face 4'a of the end piece 4, d' an O-ring seal 6 housed in an annular groove 7 formed in said front face 4 ′ of the end piece 4.

A son extrémité opposée à celle comportant le filetage cylindrique 4a, l'embout 4 présente un filetage conique 4b destiné à être vissé dans l'orifice 8, muni d'un taraudage conique 8a, du corps d'appareil 3 qui est destiné à recevoir cet embout 4. At its end opposite to that comprising the cylindrical thread 4a, the end piece 4 has a conical thread 4b intended to be screwed into the orifice 8, provided with a conical thread 8a, of the device body 3 which is intended to receive this nozzle 4.

L'embout 4 présente, entre ses deux extrémités pourvues, respectivement, d'un filetage cylindrique 4a et d'un filetage conique 4b et, en partant de ce dernier, un segment cylindrique lisse 4c d'un diamètre sensiblement égal au grand diamètre du filetage conique 4b suivi d'un segment cylindrique fileté 4d d 'un diamètre supérieur à celui du segment cylindrique lisse 4c. The endpiece 4 has, between its two ends provided, respectively, with a cylindrical thread 4a and a conical thread 4b and, starting from the latter, a smooth cylindrical segment 4c with a diameter substantially equal to the large diameter of the conical thread 4b followed by a threaded cylindrical segment 4d with a diameter greater than that of the smooth cylindrical segment 4c.

Sur le segment filete 4d est vissé un écrou 9 presentant, du côte de son extrémité située du segment lisse 4c conique 4b, un épaulement interne 9a dont l'alésage 9'a possède un diamètre sensiblement égal au diamètre du segment cylindrique lisse 4c et qui recouvre partiellement ce dernier. On the threaded segment 4d is screwed a nut 9 having, on the side of its end located on the smooth segment 4c conical 4b, an internal shoulder 9a whose bore 9'a has a diameter substantially equal to the diameter of the smooth cylindrical segment 4c and which partially covers the latter.

En outre, entre l'épaulement 9a de l'écrou 9 et le segment cylindrique lisse 4c de l'embout 4 est comprimé un joint torique 11 partiellement logé dans une gorge annulaire 12 aménagée dans l'alésage 9'a de l'épaulement 9a de l'écrou 9. Ce joint torique 11 empêche le fluide qui aurait éventuellement traversé les filets du filetage conique 4b de l'embout 4 de poursuivre sa fuite en direction de l'extérieur à travers les filets du segment fileté 4d de l'embout 4. In addition, between the shoulder 9a of the nut 9 and the smooth cylindrical segment 4c of the end piece 4 is compressed an O-ring 11 partially housed in an annular groove 12 arranged in the bore 9'a of the shoulder 9a of the nut 9. This O-ring 11 prevents the fluid which would have possibly passed through the threads of the conical thread 4b of the end piece 4 from continuing to leak towards the outside through the threads of the threaded segment 4d of the end piece 4.

Par ailleurs, entre l'extrémité frontale 9 de l'écrou 9, tournée du côté du corps d'appareil 3, et la face d'accouplement 3' de ce corps d'appareil 3, est comprimé un joint d'étanchéité 13. Ce joint d'étanchéité 13 a pour but d'empêcher le fluide qui aurait éventuellement traversé les filets du filetage conique 4b de l'embout 4 de poursuivre sa fuite radialement vers l'extérieur, entre la face d'assemblage 3' du corps d'appareil 3 et la face terminale correspondante 9' de l'écrou 9.  Furthermore, between the front end 9 of the nut 9, facing the side of the device body 3, and the coupling face 3 'of this device body 3, a seal 13 is compressed. The purpose of this seal 13 is to prevent the fluid which may have passed through the threads of the conical thread 4b of the end piece 4 from continuing to leak radially outward, between the assembly face 3 'of the body d 'device 3 and the corresponding end face 9' of the nut 9.

Egalement, l'extrémité frontale 9' de l'écrou 9 définit une portée par laquelle 1 écrou 9 vient en contact et prend appui sur le plan d'appui que présente le corps 3 de l'appareil. Also, the front end 9 ′ of the nut 9 defines a range by which 1 nut 9 comes into contact and bears on the support plane presented by the body 3 of the device.

Dans l'exemple illustré sur la figure 2, le joint d'étanchéité 13 comprimé entre l'écrou 9 et le corps d'appareil 3 est un joint torique. En outre, ce joint est logé dans un décolletage 13a prévu coaxialerent à l'alésage 9'a de l'épaulement 9a de l'écrou 9, dans la face terminale 9' de ce dernier. In the example illustrated in Figure 2, the seal 13 compressed between the nut 9 and the device body 3 is an O-ring. In addition, this seal is housed in a turning 13a provided coaxial to the bore 9'a of the shoulder 9a of the nut 9, in the end face 9 'of the latter.

L'exemple illustré par la figure 3 diffère de celui illustré par la figure 2 par le seul fait que le joint torique 13 est logé dans une gorge annulaire 13b ménagée dans la face frontale 9' de l'écrou 9, tandis que l'exemple illustré par la figure 4 diffère des deux précédents par le fait que le joint d'étanchéité comprime entre le corps d'appareil 3 et l'écrou 9 est un joint 13' de section transversale rectangulaire et qutil est logé dans un décolletage 13c aménage, cooxialement à l'orifice 8 du corps d'appareil 3, dans la face de raccordement de ce dernier. The example illustrated by FIG. 3 differs from that illustrated by FIG. 2 by the only fact that the O-ring 13 is housed in an annular groove 13b formed in the front face 9 'of the nut 9, while the example illustrated by FIG. 4 differs from the previous two by the fact that the seal compresses between the device body 3 and the nut 9 is a seal 13 ′ of rectangular cross section and that it is housed in a turned 13c fitting, cooxially to the orifice 8 of the device body 3, in the connection face of the latter.

Ce dispositif de raccordement peut recevoir de nombreuses aplications différentes mais il est tout naturellement destiné aux applications dans lesquelles il est fondamental de ne pas pollueur le fluide véhiculé par la canalisation 2. I1 en est ainsi, notamment lorsque le fluide véhiculé alimente des chambres de capteurs. This connection device can receive many different applications but it is quite naturally intended for applications in which it is fundamental not to pollute the fluid conveyed by the pipe 2. I1 is so, in particular when the conveyed fluid feeds the sensor chambers .

Comme on l'aura compris, le dispositif de raccordement présente les avantages suivants : - adaptabilité à tout type de capteur ; - montage simple et aisément reproductible, de sorte que
le risque d'une erreur de montage est réduit ; - tenue aux vibrations et tenue statique, ce qui lui
confère en particulier une bonne tenue sismique ; - tenue aux hautes et basses pressions et températures ; - tenue aux rayonnements ionisants - tenue au vieillissement et fiabilité dans le temps.As will be understood, the connection device has the following advantages: - adaptability to any type of sensor; - simple and easily reproducible mounting, so that
the risk of an assembly error is reduced; - resistance to vibrations and static resistance, which
in particular gives good seismic resistance; - resistance to high and low pressures and temperatures; - resistance to ionizing radiation - resistance to aging and reliability over time.

L'invention trouve avantageusement (mais non limitativement) application dans le domaine des centrales nucléaires, pour le raccordement entre des cuves de pressuriseurs et des capteurs de contrôle de pression. The invention advantageously finds (but is not limited to) application in the field of nuclear power plants, for the connection between pressurizer tanks and pressure control sensors.

Dans ce cas, en effet, la défaillance d'un raccord entraine le déclenchement immédiat des protections du réacteur et provoque un arrêt dont le coût est important.In this case, in fact, the failure of a connection causes the immediate activation of the reactor protections and causes a shutdown, the cost of which is significant.

Bien entendu, d'autres applications sont envisageables. En particulier, le dispositif de raccord selon l'invention trouve egalement avantageusement application dans les techniques de réalisation de composants électroniques qui mettent en oeuvre des faibles pressions, ou encore en cryogénie.  Of course, other applications are possible. In particular, the connection device according to the invention also advantageously finds application in techniques for producing electronic components which use low pressures, or also in cryogenics.

Claims (7)

REVENDICATIONS 1. Dispositif de raccordement étanche d'une canalisation (2) à un corps d'appareil (3), du type comprenant un embout (4) solidaire de la canalisation (2) et pourvu d'un filetage conique (4b) destiné à être visse dans un orifice (8) du corps d'appareil (3) pourvu d'un taraudage conique (8a) complementaire, caractérise en ce que l'embout (4) présente, entre son filetage conique (4b) et la zone de raccordement de la canalisation (2), et en partant du premier en direction de la seconde, d'une part, un segment cylindrique lisse (4c), d'un diamètre sensiblement égal au grand diamètre du filetage conique (4b), et, d'autre part, un segment cylindrique filete (4d) d'un diamètre supérieur à celui du segment lisse (4c) et sur lequel est vissé un ecrou (9) qui présente, au droit du segment lisse (4c) de l'embout (4), un épaulement (9a) dont l'alésage (9'a) présente un diamètre sensiblement égal à celui du segment lisse (4c) ; un premier joint d'étanchéité (13) étant comprimé entre un plan d'appui que présente le corps de l'appareil (3) recevant ce dispositif et la face frontale (9') de l'écrou (9), tandis qu'un deuxième joint d'étanchéité (11) est comprimé entre l'épaulement interne (9a) de l'écrou (9) et le segment lisse (4c) de l'embout (4). 1. A device for sealingly connecting a pipe (2) to an appliance body (3), of the type comprising a nozzle (4) integral with the pipe (2) and provided with a conical thread (4b) intended to be screwed into an orifice (8) of the device body (3) provided with a complementary conical thread (8a), characterized in that the end piece (4) has, between its conical thread (4b) and the area of connection of the pipe (2), and starting from the first in the direction of the second, on the one hand, a smooth cylindrical segment (4c), of a diameter substantially equal to the large diameter of the conical thread (4b), and, on the other hand, a threaded cylindrical segment (4d) with a diameter greater than that of the smooth segment (4c) and on which is screwed a nut (9) which has, in line with the smooth segment (4c) of the end piece (4), a shoulder (9a) whose bore (9'a) has a diameter substantially equal to that of the smooth segment (4c); a first seal (13) being compressed between a support plane presented by the body of the device (3) receiving this device and the front face (9 ') of the nut (9), while a second seal (11) is compressed between the internal shoulder (9a) of the nut (9) and the smooth segment (4c) of the end piece (4). 2. Dispositif selon la revendication 1, caractérisé en ce que l'écrou (9) présente une portée frontale par laquelle il vient en contact et prend appui sur le plan d'appui précite que présente le corps de l'appareil (3), lors de son serrage par rapport à l'embout (4), le premier joint d'étanchéité (13) étant reçu dans un logement annulaire du corps de l'appareil (3) et/ou de la face frontale de l'écrou (9). 2. Device according to claim 1, characterized in that the nut (9) has a front surface by which it comes into contact and bears on the abovementioned support plane that has the body of the device (3), when it is tightened relative to the end piece (4), the first seal (13) being received in an annular housing of the body of the device (3) and / or of the front face of the nut ( 9). 3. Dispositif selon la revendication 2, caractérisé en ce que le logement dans lequel le premier joint d'étanchéité (13) est reçu est une gorge annulaire (13b) ménagée dans la face frontale (9') de l'écrou (9). 3. Device according to claim 2, characterized in that the housing in which the first seal (13) is received is an annular groove (13b) formed in the front face (9 ') of the nut (9) . 4. Dispositif selon la revendication 2, caractérisé en ce que le logement dans lequel le premier joint d'étanchéité est reçu est un décolletage (13c) ménagé, coaxialement à l'orifice (8) du corps d'appareil (3), dans le plan d'appui de ce dernier. 4. Device according to claim 2, characterized in that the housing in which the first seal is received is a turning (13c) formed, coaxially with the orifice (8) of the device body (3), in the latter's support plan. 5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le premier joint d'étanchéité (13) est un joint torique. 5. Device according to one of the preceding claims, characterized in that the first seal (13) is an O-ring. 6. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que le premier joint d'étanchéité (13) est de section carre ou rectangulaire. 6. Device according to one of claims 1 to 4, characterized in that the first seal (13) is of square or rectangular section. 7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le deuxième joint d'étanchéité (11) est un joint torique partiellement loge dans une gorge annulaire (12) ménagée dans l'alésage (9'a) de l'épaulement (9a) de l'écrou (9).  7. Device according to one of the preceding claims, characterized in that the second seal (11) is an O-ring partially housed in an annular groove (12) formed in the bore (9'a) of the shoulder (9a) of the nut (9).
FR9500446A 1995-01-17 1995-01-17 DEVICE FOR SEALED CONNECTION OF A FLUID PIPING TO AN APPARATUS BODY Expired - Lifetime FR2729453B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577604A1 (en) * 2004-03-16 2005-09-21 Luxembourg Patent Company S.A. Valve with counternut
DE102007007780A1 (en) * 2007-02-16 2008-08-21 Parker Hannifin Gmbh & Co. Kg Direction-adjustable screw pipe joint, has outer seal inserted into insert that is pressed against counter piece during mounting pipe joint axially at outer circumference of counter nut
US8789854B2 (en) 2011-12-09 2014-07-29 Mercury Plastics, Inc. Quick-connect tube coupling
US11898676B2 (en) 2020-05-13 2024-02-13 Mercury Plastics Llc Quick-connect fitting

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
US9726309B1 (en) 2013-03-13 2017-08-08 Mercury Plastics, Inc. Tube connection nut and ferrule assembly

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US2373253A (en) * 1941-05-26 1945-04-10 Otis C Martin Straight thread fitting
DE922265C (en) * 1953-06-25 1955-01-13 Jean Alexandre Tight connection piece for pressurized fluid containers
DE1094055B (en) * 1959-01-08 1960-12-01 Hans Kreidel Jun Direction-adjustable and lockable screw-in high pressure pipe connection
DE1937946U (en) * 1966-03-04 1966-05-05 Kessler & Co Tech Chem Gmbh ELBOW FITTING.
DE7013092U (en) * 1970-04-10 1970-07-30 Ati Gmbh ADJUSTABLE SCREW JOINT.
DE2812294A1 (en) * 1978-03-21 1979-10-04 Reich Kg Regel & Sicherheits Valve seal for radiator union - has shoulder screwing onto spigot and enclosing sealing ring in annular groove
FR2602303A1 (en) * 1986-07-31 1988-02-05 Air Liquide "Double seal" valve for compressed and liquefied gas bottles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2373253A (en) * 1941-05-26 1945-04-10 Otis C Martin Straight thread fitting
DE922265C (en) * 1953-06-25 1955-01-13 Jean Alexandre Tight connection piece for pressurized fluid containers
DE1094055B (en) * 1959-01-08 1960-12-01 Hans Kreidel Jun Direction-adjustable and lockable screw-in high pressure pipe connection
DE1937946U (en) * 1966-03-04 1966-05-05 Kessler & Co Tech Chem Gmbh ELBOW FITTING.
DE7013092U (en) * 1970-04-10 1970-07-30 Ati Gmbh ADJUSTABLE SCREW JOINT.
DE2812294A1 (en) * 1978-03-21 1979-10-04 Reich Kg Regel & Sicherheits Valve seal for radiator union - has shoulder screwing onto spigot and enclosing sealing ring in annular groove
FR2602303A1 (en) * 1986-07-31 1988-02-05 Air Liquide "Double seal" valve for compressed and liquefied gas bottles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577604A1 (en) * 2004-03-16 2005-09-21 Luxembourg Patent Company S.A. Valve with counternut
DE102007007780A1 (en) * 2007-02-16 2008-08-21 Parker Hannifin Gmbh & Co. Kg Direction-adjustable screw pipe joint, has outer seal inserted into insert that is pressed against counter piece during mounting pipe joint axially at outer circumference of counter nut
DE102007007780B4 (en) * 2007-02-16 2013-11-28 Parker Hannifin Gmbh & Co. Kg Direction adjustable pipe fitting
DE102007007780C5 (en) 2007-02-16 2018-11-29 Parker Hannifin Gmbh & Co. Kg Direction adjustable pipe fitting
US8789854B2 (en) 2011-12-09 2014-07-29 Mercury Plastics, Inc. Quick-connect tube coupling
US9103478B2 (en) 2011-12-09 2015-08-11 Mercury Plastics, Inc. Quick-connect tube coupling
US10082232B2 (en) 2011-12-09 2018-09-25 Mercury Plastics Llc Quick-connect tube coupling
US11898676B2 (en) 2020-05-13 2024-02-13 Mercury Plastics Llc Quick-connect fitting

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