FR2568665A1 - Connection for tubes for high pressure - Google Patents
Connection for tubes for high pressure Download PDFInfo
- Publication number
- FR2568665A1 FR2568665A1 FR8412347A FR8412347A FR2568665A1 FR 2568665 A1 FR2568665 A1 FR 2568665A1 FR 8412347 A FR8412347 A FR 8412347A FR 8412347 A FR8412347 A FR 8412347A FR 2568665 A1 FR2568665 A1 FR 2568665A1
- Authority
- FR
- France
- Prior art keywords
- cone
- ring
- cylindrical
- housing
- pipe
- 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
Links
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
- 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
- F16L19/08—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 with metal rings which bite into the wall of the pipe
- F16L19/10—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 with metal rings which bite into the wall of the pipe the profile of the ring being altered
- F16L19/12—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 with metal rings which bite into the wall of the pipe the profile of the ring being altered with additional sealing means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Sleeves (AREA)
Abstract
Description
L'invention se rapporte aux raccords pour tubes notamment pour tubes métalliques dans lesquels circulent des fluides à haute pression, du type comportant une bague à sertir sur le tube sous l'action du vissage de l'écrou sur le corps du raccord. The invention relates to fittings for tubes, in particular for metallic tubes in which high pressure fluids circulate, of the type comprising a ring to be crimped onto the tube under the action of screwing the nut onto the body of the fitting.
On sait que dans les raccords de ce type général, par exemple conformes à la norme allemande DIN 2353, le corps comprend un premier alésage cylindrique, suivi d'un deuxième alésage cylindrique assurant le centrage et le logement du tube, l'épaulement constitué par la différence de diamètres de ces deux alésages servant de butée au tube à raccorder, ce deuxième alésage aboutissant à un cône de 248. Extérieurement, le corps est fileté à sa partie postérieure. Par ailleurs l'écrou creux se vissant sur celle-ci, comporte un cône intérieur. La bague à sertir-, enfilée sur le tube comporte une face avant destinée à prendre appui sur l'extrémité arrière du corps.Dans sa partie arrière elle est conique en vue d'appliquer contre le cône intérieur de écrou, et évidée intérieurement de manière à constituer une ou des saillies destinées à être serties dans le tube. Il est bien connu que pour obtenir ce sertissage, on visse l'écrou sur le corps. La coopération du cône extérieur de la bague et du cône intérieur de l'écrou conjuguée à la réaction de la face avant de cette bague sur l'extrémité du corps fait que la partie postérieure p or- tant la ou les lèvre(s) de sertissage, s'incline en direction du tube dans lequel elle s'incrustera. We know that in fittings of this general type, for example in accordance with German standard DIN 2353, the body comprises a first cylindrical bore, followed by a second cylindrical bore ensuring the centering and the housing of the tube, the shoulder formed by the difference in diameters of these two bores serving as a stop for the tube to be connected, this second bore leading to a cone of 248. Externally, the body is threaded at its rear part. Furthermore, the hollow nut screwing onto it has an internal cone. The crimp ring, threaded on the tube has a front face intended to bear on the rear end of the body. In its rear part it is tapered in order to apply against the internal cone of nut, and internally hollowed out so to constitute one or more projections intended to be crimped into the tube. It is well known that to obtain this crimping, the nut is screwed onto the body. The cooperation of the outer cone of the ring and the inner cone of the nut combined with the reaction of the front face of this ring on the end of the body means that the posterior part for the lip (s) of crimping, tilts towards the tube in which it will be embedded.
On observe que ce résultat est obtenu par un basculement de la partie avant de la bague en direction de l'arrière. Reste alors à résoudre le problème de 1 'étan- chéité avant, c'est-à-dire entre bague-corps et tube. It is observed that this result is obtained by tilting the front part of the ring towards the rear. There then remains the problem of the front seal, that is to say between the ring-body and the tube.
On a déjà proposé de placer à l'intérieur du cône de 240 un joint en matière déformable solidaire ou non de
la partie antérieure de la bague. Les Brevets Français
Legris n0 2406773, 2437560 et 2461186 proposent de pousser ce joint dans ce cône en munissant la partie antérieure de la bague d'un appendice dont la section constitue une lèvre mince annulaire adjacente au tube.It has already been proposed to place inside the cone of 240 a seal of deformable material integral or not with
the front part of the ring. French Patents
Legris no. 2406773, 2437560 and 2461186 propose to push this seal into this cone by providing the front part of the ring with an appendage whose section constitutes a thin annular lip adjacent to the tube.
Ce dispositif utilise un joint préformé conique dont la face postérieure est pourvue d'un alésage de forme et de dimensions complémentaires à celle de l'appendice précité. This device uses a conical preformed seal whose rear face is provided with a bore of shape and dimensions complementary to that of the above-mentioned appendix.
En fait, un tel joint agit comme un coin plus ou moins compressible à fluage pratiquement nul. Il s'agit d'une sorte de compactage. In fact, such a joint acts as a more or less compressible wedge with practically zero creep. It is a kind of compaction.
Dans sa demande n0 8121879 du 23 novembre 1981, la
Demanderesse a proposé un autre mode d'étanchéité de la partie antérieure de raccords de ce type, utilisant un joint se déformant sous la poussée due au vissage, de manière à ce qu'il flue en direction d'un cône, d'une part, et du tube, d'autre part.In its application No. 8121879 of 23 November 1981, the
The Applicant has proposed another method of sealing the front part of fittings of this type, using a seal which deforms under the thrust due to the screwing, so that it flows in the direction of a cone, on the one hand , and tube, on the other hand.
La présente invention propose une solution d'étan- chéité différente, dans laquelle la bague est crantée à ses deux extrémités destinées à s'incruster dans le tube sous l'action du rapprochement des deux cônes du corps et de l'écrou, l'extrémité antérieure dans son basculement écrasant positivement une partie du joint contre le tube. The present invention provides a different sealing solution, in which the ring is notched at its two ends intended to become embedded in the tube under the action of the bringing together of the two cones of the body and the nut, the anterior end in its tilting positively crushing part of the joint against the tube.
D'autres particularités et avantages apparaitront à la lecture de la description et des revendications qui suivent, faites en regard des dessins sur lesquels
- la figure 1 représente en coupe longitudinale un raccord selon l'invention avant serrage de l'écrou sur le corps ;
- la figure 2 est une coupe similaire faite sur le même raccord après serrage.Other features and advantages will appear on reading the description and the claims which follow, made with reference to the drawings on which
- Figure 1 shows in longitudinal section a connector according to the invention before tightening the nut on the body;
- Figure 2 is a similar section made on the same fitting after tightening.
Comme on le voit sur ces figures, le raccord selon l'invention est du type comportant un corps C fileté extérieurement en C4 et alésé intérieurement d'aval en amont, d'une première partie cylindrique Cl d'une seconde partie cylindrique C2 faisant avec Cl un épaulement K contre le quel vient buter le tube T à raccorder, et enfin d'un cône C3 > un écrou creux E fileté intérieurement en E1 en vue de visser sur la partie C4 du corps, cet écrou étant alésé d'un cône intérieur E2 et à l'intérieur de l'écrou une bague B en métal dont la partie postérieure comporte au moins un cône B1 de pente identique à celle du cône E2 et intérieurement un évidement B2 délimitant vers l'arrière une ou deux saillies annulaires formant lèvres de sertissage B3 destinées à être incrustées dans le tube T, afin de réaliser l'accrochage mécanique ; cette bague à sa partie frontale comportant un plan radial B4 destiné à venir s'appliquer contre l'extrémité du corps C5. As can be seen in these figures, the connector according to the invention is of the type comprising a body C externally threaded in C4 and internally bored downstream upstream, of a first cylindrical part C1 of a second cylindrical part C2 making with Cl a shoulder K against which abuts the tube T to be connected, and finally a cone C3> a hollow nut E internally threaded in E1 in order to screw on the part C4 of the body, this nut being bored with a cone inside E2 and inside the nut a metal ring B, the rear part of which comprises at least one cone B1 with a slope identical to that of the cone E2 and internally a recess B2 delimiting towards the rear one or two annular projections forming crimping lips B3 intended to be embedded in the tube T, in order to achieve mechanical attachment; this ring at its front part comprising a radial plane B4 intended to come to bear against the end of the body C5.
En raison de l'évidement B2, qui amincit considérablement la partie B1, la pression de l'écrou sur le corps se traduit par un basculement de cette partie B1 en direction du tube grâce au cône E2. Due to the recess B2, which considerably thins the part B1, the pressure of the nut on the body results in a tilting of this part B1 in the direction of the tube thanks to the cone E2.
La bague décrite dans la demande n0 81.21879 était elle-même évidée pour favoriser un ancrage similaire, mais le cône du corps n'a d'autres fonctions que de comprimer le joint. The ring described in application No. 81.21879 was itself hollowed out to favor a similar anchoring, but the body cone has no other function than to compress the joint.
La Demanderesse constata que dans le début de la phase de serrage, à partir du moment où l'ancrage commen çait à être efficace, la bague avait tendance à se plier, si bien que la compression du joint d'étanchéité antérieur placé entre tube et cône du corps, ne devenait effective qu'avec un certain retard. The Applicant noted that in the beginning of the tightening phase, from the moment when the anchoring began to be effective, the ring tended to bend, so that the compression of the anterior seal placed between tube and body cone, became effective only after a certain delay.
Dans le FR-A-1254.420, GUILLON propose d'utiliser une bague biconique en deux pièces filetées intérieurement. On retrouve une bague biconique dans le FR-A-1077450 égal en ment au nom de GUILLON, cette bague comporte au moins une saillie destinée à venir s'ancrer dans une gorge circulaire du tube du fait de la flexion de la bague sous l'effet de la compression en bout dont elle est l'objet. In FR-A-1254.420, GUILLON suggests using a two-piece biconical ring internally threaded. We find a biconical ring in FR-A-1077450 also ment ment to GUILLON, this ring has at least one projection intended to be anchored in a circular groove of the tube due to the bending of the ring under the effect of end compression of which it is the object.
Tout comme dans la demande n0 81.21879, la flexion de la bague décrite dans ce brevet n'est pas utilisée d'une manière complète, elle ne sert qu'à l'ancrage (sur tube lisse chez la Demanderesse, dans des rainures préétablies chez GUILLON). As in application No. 81.21879, the bending of the ring described in this patent is not used in a complete manner, it is only used for anchoring (on a smooth tube at the Applicant, in predetermined grooves at GUILLON).
LEGRIS dans ses brevets FR-A-2.406.773, FR-A2.437.560 et FR-A-2.461.186, utilise lui aussi des bagues biconiques dont les saillies d'ancrage sont, dans les deux premiers brevets précités, destinées à entrer dans des gorges creusées dans le tube, étant à noter toutefois qu'il n'y a pas de phénomène de flexion appréciable. LEGRIS in its patents FR-A-2,406,773, FR-A2,437,560 and FR-A-2,461,186, also uses biconical rings whose anchoring projections are, in the first two aforementioned patents, intended to enter in grooves hollowed out in the tube, it should be noted however that there is no appreciable phenomenon of bending.
La Demanderesse, dans la présente invention entend utiliser, la flexion d'une bague biconique fortement évidée à sa partie médiane pour obtenir non seulement un ancrage à chaque extrémité, mais aussi une contrainte notable du joint en direction du tube. The Applicant, in the present invention intends to use, the bending of a biconical ring strongly recessed at its middle part to obtain not only an anchoring at each end, but also a significant stress of the joint in the direction of the tube.
Pour un état de la technique complet il faut citer le DE-A-1912337 qui décrit un raccord du type en cause pourvu d'une bague biconique comportant une série de saillies dans la partie conique faisant vis-à-vis du cône de l'écrou, et un logement dans la partie placée en regard du cône du corps, logement destiné à recevoir un joint circulaire à talon. For a complete state of the art, mention should be made of DE-A-1912337, which describes a connector of the type in question provided with a biconical ring comprising a series of projections in the conical part facing the cone of the nut, and a housing in the part placed opposite the cone of the body, housing intended to receive a circular joint at heel.
Cette bague n'ayant pas d'évidement intérieur, sa flexibilité est très faible. This ring having no internal recess, its flexibility is very low.
Selon l'invention, la bague B comporte un fort évidement B2 séparant deux séries de saillies (B3 et B5) devant s'ancrer dans le tube (sans usinage préalable de gorges), une série antérieure B5 et une série postérieure
B3.According to the invention, the ring B has a large recess B2 separating two series of projections (B3 and B5) which must be anchored in the tube (without prior machining of grooves), an anterior series B5 and a posterior series
B3.
En avant de la plus antérieure de ces saillies, la bague B comporte un alésage B6 formant logement, destiné à recevoir un joint d'étanchéité J dont la partie antérieure
J1 est cylindro-conique pour veni#r appliquer contre le cône C3, et la partie postérieure J2 est sensiblement cylindrique pour venir se loger dans l'alésage B6.In front of the most anterior of these projections, the ring B has a bore B6 forming a housing, intended to receive a seal J of which the front part
J1 is cylindrical-conical to come to # r apply against the cone C3, and the rear part J2 is substantially cylindrical to be housed in the bore B6.
I1 est aisé de comprendre que le comportement d'une telle bague est totalement différent de celui des bagues antérieures sus-rappelées. It is easy to understand that the behavior of such a ring is completely different from that of the above-mentioned earlier rings.
Comme dans les brevets GUILLON, cette nouvelle bague va connaitre une flexion importante sous l'effet du vissage, flexion facilitée par la présence du logement B2 et la dépouille Bg aboutissant à la saillie B5. Mais du fait que les saillies B3 et B5 n'ont pas à venir s' encli- queter dans des rainures pré-établies dans le tube, la bague pouvant reculer s'ancre progressivement. As in the GUILLON patents, this new ring will experience significant bending under the effect of the screwing, bending facilitated by the presence of the housing B2 and the relief Bg leading to the projection B5. However, since the projections B3 and B5 do not have to snap into pre-established grooves in the tube, the ring which can move back gradually becomes anchored.
Comme sa partie antérieure comporte une partie cylindrique B8 limitée par le plan radial B4 et faisant suite à la partie conique B7, il est facile de comprendre que le serrage de l'écrou commence à comprimer le joint J, puis à faire pénétrer la ou les saillie(s) B5 dans le tube par simple serrage. As its front part comprises a cylindrical part B8 bounded by the radial plane B4 and following the conical part B7, it is easy to understand that the tightening of the nut begins to compress the joint J, then to make penetrate the projection (s) B5 in the tube by simple tightening.
Ce n'est que lorsque C5 entre en contact avec B4 que la bague B recule. Le contact des cônes B1 et E2 provoque l'ancrage de B3 dans le tube T. Plus le vissage devient énergique, plus la bague se déforme en se mettant en tuile, ce qui a pour effet d'une part d'accroître les ancrages et d'autre part de pincer la partie J2 du joint J contre la partie latérale du tube T. Avantageusement, la partie P2 du joint J est encastrée dans le logement B6 et de préférence fixée par collage dans celui-ci. It is only when C5 comes into contact with B4 that the ring B moves back. The contact of the cones B1 and E2 causes the anchoring of B3 in the tube T. The more energetic the screwing becomes, the more the ring is deformed by being tiled, which has the effect of increasing the anchors on the one hand and on the other hand to pinch the part J2 of the joint J against the lateral part of the tube T. Advantageously, the part P2 of the joint J is embedded in the housing B6 and preferably fixed by gluing therein.
Contrairement à ce qui existe dans les raccords ac- tuellement connus,le lejoint J assure l'étanchéité entre corps et tube d'une double manière ; d'abord par la partie
J1 comprimée entre le cône C3 et le tube, puis par la partie J2 pincée entre B7 et ce même tube. Contrary to what exists in the currently known fittings, the seal J ensures the seal between body and tube in a double way; first by the party
J1 compressed between the cone C3 and the tube, then by the part J2 pinched between B7 and this same tube.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8412347A FR2568665B3 (en) | 1984-08-03 | 1984-08-03 | CONNECTION FOR HIGH PRESSURE TUBES. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8412347A FR2568665B3 (en) | 1984-08-03 | 1984-08-03 | CONNECTION FOR HIGH PRESSURE TUBES. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2568665A1 true FR2568665A1 (en) | 1986-02-07 |
| FR2568665B3 FR2568665B3 (en) | 1986-12-05 |
Family
ID=9306796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8412347A Expired FR2568665B3 (en) | 1984-08-03 | 1984-08-03 | CONNECTION FOR HIGH PRESSURE TUBES. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2568665B3 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4426445A1 (en) * | 1993-07-28 | 1995-02-09 | Bell Hermetic Armaturen | Cutting ring and pipe screw-connection provided with a cutting ring |
| DE4447592C2 (en) * | 1993-07-28 | 1998-01-08 | Bell Hermetic Armaturen | Pipe coupling and associated sealing and gripping olive-ring |
| EP0863354A1 (en) | 1997-03-07 | 1998-09-09 | Armaturenfabrik Hermann Voss GmbH + Co. | Pipe fitting with bite ring for metal pipes |
| US5988761A (en) * | 1996-10-31 | 1999-11-23 | Robert Bosch Technologies Corporation | Vehicle brake and hub attachment system and method |
| DE19727149C2 (en) * | 1997-06-26 | 2002-10-24 | Voss Fluid Gmbh & Co Kg | Pipe fitting with cutting ring |
| DE4319884C2 (en) * | 1993-06-16 | 2003-10-09 | Voss Automotive Gmbh | Pipe fitting with cutting ring and additional circumferential sealing |
| CN1325808C (en) * | 2002-12-18 | 2007-07-11 | F.W.奥文特罗普两合公司 | Pipe screwthread connection device |
| EP3070386A1 (en) * | 2015-03-18 | 2016-09-21 | Franz Blanke | Cutting ring for a pipe joint |
| US20170292639A1 (en) * | 2016-04-12 | 2017-10-12 | Vetco Gray Inc. | Carbon Fiber Composite Reinforcement With Circumferential And Axial Interlocking |
| EP3775654A4 (en) * | 2018-04-06 | 2021-12-08 | Kim, Brian, B. | Fitting device for making connection tube |
-
1984
- 1984-08-03 FR FR8412347A patent/FR2568665B3/en not_active Expired
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4319884C2 (en) * | 1993-06-16 | 2003-10-09 | Voss Automotive Gmbh | Pipe fitting with cutting ring and additional circumferential sealing |
| DE4426445C3 (en) * | 1993-07-28 | 2002-02-28 | Bell Hermetic Armaturen | cutting ring |
| DE4447592C2 (en) * | 1993-07-28 | 1998-01-08 | Bell Hermetic Armaturen | Pipe coupling and associated sealing and gripping olive-ring |
| DE4426445A1 (en) * | 1993-07-28 | 1995-02-09 | Bell Hermetic Armaturen | Cutting ring and pipe screw-connection provided with a cutting ring |
| US5988761A (en) * | 1996-10-31 | 1999-11-23 | Robert Bosch Technologies Corporation | Vehicle brake and hub attachment system and method |
| US6073976A (en) * | 1997-03-07 | 2000-06-13 | Armaturenfabrik Hermann Voss Gmbh & Co. | Screwed pipe joint with cutting ring for metal tubes |
| DE19709464C2 (en) * | 1997-03-07 | 2000-03-09 | Voss Armaturen | Pipe fitting with cutting ring for metallic pipes |
| EP0863354A1 (en) | 1997-03-07 | 1998-09-09 | Armaturenfabrik Hermann Voss GmbH + Co. | Pipe fitting with bite ring for metal pipes |
| DE19727149C2 (en) * | 1997-06-26 | 2002-10-24 | Voss Fluid Gmbh & Co Kg | Pipe fitting with cutting ring |
| CN1325808C (en) * | 2002-12-18 | 2007-07-11 | F.W.奥文特罗普两合公司 | Pipe screwthread connection device |
| EP3070386A1 (en) * | 2015-03-18 | 2016-09-21 | Franz Blanke | Cutting ring for a pipe joint |
| US20170292639A1 (en) * | 2016-04-12 | 2017-10-12 | Vetco Gray Inc. | Carbon Fiber Composite Reinforcement With Circumferential And Axial Interlocking |
| EP3775654A4 (en) * | 2018-04-06 | 2021-12-08 | Kim, Brian, B. | Fitting device for making connection tube |
| AU2019249120B2 (en) * | 2018-04-06 | 2022-03-10 | Kim, Brian B | Fitting device for making connection tube |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2568665B3 (en) | 1986-12-05 |
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