FR2562984A1 - Safety connection for pneumatic circuits - Google Patents
Safety connection for pneumatic circuits Download PDFInfo
- Publication number
- FR2562984A1 FR2562984A1 FR8406170A FR8406170A FR2562984A1 FR 2562984 A1 FR2562984 A1 FR 2562984A1 FR 8406170 A FR8406170 A FR 8406170A FR 8406170 A FR8406170 A FR 8406170A FR 2562984 A1 FR2562984 A1 FR 2562984A1
- Authority
- FR
- France
- Prior art keywords
- shoulder
- retaining clamp
- connector according
- safety
- hand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
- F16L37/0925—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with rings which bite into the wall of the pipe
-
- 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
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
- F16L37/0926—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with an inner support sleeve arranged within the pipe
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
Description
L'invention a trait à un raccord de sécurité pour des circuits pneumatíques formés essentiellement de tubes ou de tuyaux thermoplastiques et composé d'un corps renfermant, d'une part, une pince de retenue dans laquelle est introduite l'extrémité du tube ou du tuyau et, d'autre part, un joint torique placé entre deux bagues de serrage. The invention relates to a safety connector for pneumatic circuits essentially formed from thermoplastic tubes or pipes and composed of a body containing, on the one hand, a retaining clamp into which the end of the tube or pipe and, on the other hand, an O-ring placed between two clamping rings.
On connaît déjà des raccords montés sur les extrémités des tuyaux ou des tubes thermoplastiques destinés à être utilisés notamment pour les systèmes de freinage à air comprimé des véhicules automobiles et des véhicules que ceux-ci peuvent remorquer. Ces tubes ou tuyaux thermoplastiques sont fréquemment soumis à des chocs thermiques et les raccords doivent remplir un certain nombre de critères pour les besoins de sécurité. Ces raccords comportent un corps creux dans lequel on introduit, d'une part, un joint torique emprisonné entre deux bagues de serrage et, d'autre part, une pince de retenue dans laquelle est enfilée l'extrémité du tube ou du tuyau. Ainsi, la pince de retenue est disposée avant le joint torique. There are already known fittings mounted on the ends of thermoplastic pipes or tubes intended to be used in particular for compressed air braking systems of motor vehicles and of vehicles which they can tow. These thermoplastic tubes or pipes are frequently subjected to thermal shock and the fittings must meet a certain number of criteria for safety needs. These fittings comprise a hollow body into which one introduces, on the one hand, an O-ring trapped between two clamping rings and, on the other hand, a retaining clamp in which is threaded the end of the tube or pipe. Thus, the retaining clip is arranged before the O-ring.
Cependant, ces raccords présentent plusieurs inconvénients. En effet, lors de l'introduction de l'extrémité du tube dans la pince de retenue on risque de rayer ledit tube dans sa zone d'étanchéité. Du fait que le joint torique se trouve au-delà de la pince, il nty a pas de moyen d'étanchéité aux endroits de la ou des rayures. Par ailleurs, il arrive fréquemment que, par suite des effets de vibration, la liaison entre la pince de retenue et l'extrémité du tube se desserre, ce qui peut entraîner de très graves incidents. However, these fittings have several drawbacks. Indeed, during the introduction of the end of the tube into the retaining clamp there is a risk of scratching said tube in its sealing zone. Because the O-ring is beyond the clamp, there is no sealing at the places of the scratch (s). Furthermore, it frequently happens that, due to the effects of vibration, the connection between the retaining clip and the end of the tube becomes loose, which can lead to very serious incidents.
Pour pallier à ces incidents, les normes régissant les exigences minimales, les systèmes de freinage à air comprimé deviennent de plus en plus draconniens et, de ce fait, de nombreux raccords ne sont plus conformes à ces normes et ne présentent plus les garanties de sécurité. To compensate for these incidents, the standards governing minimum requirements, compressed air braking systems are becoming increasingly stringent and, as a result, many fittings no longer comply with these standards and no longer offer safety guarantees. .
La présente invention a pour but de fournir un raccord répondant aux exigences d'utilisation les plus sévères en la matière. The object of the present invention is to provide a connector that meets the most severe usage requirements in this area.
A cet effet, l'invention concerne un raccord de sécurité pour des circuits pneumatiques, formés essentiellement de tubes ou de tuyaux thermo pla#tiques, et composé d'un corps renfermant, d'une part, une pince de retenue dans laquelle est introduite l'extrémité du tube ou du tuyau et, d'autre part, un joint torique placé entre deux bagues de serrage, caractérisé en ce qu'il comporte deux zones d'étanchéité disposées de part et d'autre de la pince de retenue. To this end, the invention relates to a safety connector for pneumatic circuits, formed essentially of thermoplastic tubes or pipes, and composed of a body containing, on the one hand, a retaining clamp into which is inserted the end of the tube or pipe and, on the other hand, an O-ring placed between two clamping rings, characterized in that it comprises two sealing zones arranged on either side of the retaining clamp.
Les avantages obtenus grâce à cette invention consistent essentiellement en ce que le raccord présente deux zones d'étanchéité sécurisantes, l'une constituée par le joint amortisseur limitant les effets de vibration pouvant provoquer un desserrage possible de la pince de retenue par l'ef- fet de tension initiale résultant de l'emmanchement et l'autre constituée par le joint torique assurant l'étanchéité même si le tube polyamide a été rayé lors de son introduction dans la pince de retenue. The advantages obtained thanks to this invention consist essentially in that the connector has two reassuring sealing zones, one constituted by the damping joint limiting the effects of vibration which can cause possible loosening of the retaining clamp by the ef- initial tension fet resulting from the fitting and the other constituted by the O-ring ensuring the sealing even if the polyamide tube was scratched during its introduction into the retaining clamp.
L'invention sera bien comprise en se référant à la description suivante faite à titre d'exemple non limitatif et au dessin ci-annexé dans lequel - la figure 1 représente en vue en élévation et en demi-coupe un raccord de sécurité conforme à l'invention monté sur l'extrémité d'un tube ou d'un tuyau thermoplastique - la figure 2 représente en vue en élévation et en demi-coupe le raccord de sécurité avant son montage sur le tube ou tuyau thermoplastique. The invention will be better understood by referring to the following description given by way of nonlimiting example and to the attached drawing in which - Figure 1 shows in elevation view and in half-section a safety connector conforming to the invention mounted on the end of a thermoplastic tube or pipe - Figure 2 shows in elevation view and in half-section the safety connector before mounting on the thermoplastic tube or pipe.
On se réfère aux deux figures. We refer to the two figures.
Le raccord de sécurité 1 comporte un corps 2 présentant à l'une de ses extrémités 3 un embout fileté 4 et à l'autre extrémité 5 un six pans 6 permettant, à l'aide d'un outil approprié, de visser l'embout fileté 4 dans un trou taraudé d'un raccord femelle non représenté. The safety connector 1 comprises a body 2 having at one of its ends 3 a threaded end piece 4 and at the other end 5 a hexagon 6 allowing, using a suitable tool, to screw the end piece threaded 4 in a threaded hole of a female connector not shown.
Selon un autre mode de réalisation, l'embout 4, dépourvu de filetage, est rendu solidaire d'un organe récepteur par collage, sertissage ou autre moyen analogue. According to another embodiment, the endpiece 4, devoid of thread, is made integral with a receiving member by bonding, crimping or other similar means.
On réalise dans ce corps 2 un alésage 7 présentant du côté de l'embout fileté 4 un épaulement 8. Contre cet épaulement 8 est appliqué un joint amortisseur 9 permettant d'obtenir une première zone d'étanchéité du raccord de sécurité 1 située du côté de l'embout fileté 4. Dans l'alésage 7 est enfilée une pince de retenue 10 formée d'un corps métallique dans lequel sont pratiquées des entailles 11 débouchant sur le chant 12 dirigé vers le six pans 6. A bore 7 is produced in this body 2 having on the side of the threaded end 4 a shoulder 8. Against this shoulder 8 is applied a damping seal 9 making it possible to obtain a first sealing zone of the safety fitting 1 situated on the side of the threaded end piece 4. In the bore 7 is threaded a retaining clamp 10 formed of a metal body in which are made notches 11 leading to the edge 12 directed towards the hexagon 6.
Cette pince de retenue 10 peut coulisser sur un premier décrochement 13 réalisé dans l'alésage 7. Ce premier décrochement 13, faisant suite à l'épaulement 8, aboute à -un second décrochement 14 dont l'épaulement 15 sert de butée à une première bague de serrage 16. Cette dernière comporte un alésage tronconique 17 coopérant avec le bord tronconique 18 de la pince de retenue 10. Cette coopération provoque le rapprochement des mors 19, 20 de ladite pince de retenue 10, rapprochement possible par suite des entailles 11. Contre cette première bague de serrage 16 est appliqué un joint torique 21 assurant l'étanchéité d'une seconde zone d'étanchéité du raccord de sécurité 1 du côté du six pans 6. te joint torique 21 est disposé entre la première bague de serrage 16 et une seconde bague de serrage 22.Cette dernière comporte vers le côté externe un embout 23 permettant d'obtenir un épaulement 24.This retaining clip 10 can slide on a first recess 13 produced in the bore 7. This first recess 13, following the shoulder 8, leads to a second recess 14 whose shoulder 15 serves as a stop for a first clamping ring 16. The latter has a frustoconical bore 17 cooperating with the frustoconical edge 18 of the retaining clamp 10. This cooperation causes the jaws 19, 20 to come closer to said retaining clamp 10, approximation possible as a result of the notches 11. Against this first clamping ring 16 is applied an O-ring 21 ensuring the sealing of a second sealing zone of the safety fitting 1 on the side of the hexagon 6. The O-ring 21 is disposed between the first clamping ring 16 and a second clamping ring 22. This latter has an end piece 23 towards the external side making it possible to obtain a shoulder 24.
Celui-ci vient buter contre un bord serti 25 réalisé du côté du six pans 6. The latter abuts against a crimped edge 25 produced on the side of the hexagon 6.
Ainsi, l'ensemble des éléments engagés dans l'alésage 7 et composé du joint amortisseur 9, de la pince de retenue 10, des deux bagues de serrage 16 et 22 ainsi que du joint torique 21 est maintenu, d'une part, par l'épaulement 8 et, d'autre part, par le bord serti 25.Thus, all of the elements engaged in the bore 7 and composed of the damping seal 9, the retaining clamp 10, the two clamping rings 16 and 22 as well as the O-ring 21 is maintained, on the one hand, by the shoulder 8 and, on the other hand, by the crimped edge 25.
Pour parfaire la jonction entre le raccord de sécurité 1 et le tube ou tuyau thermoplastique 26, on peut avantageusement prévoir une fourrure de renfort 27. Cependant, cette fourrure de renfort 27 n'est pas indispensable au bon fonctionnement du raccord de sécurité 1. En générai, le tube ou tuyau thermoplastique 26 est réalisé en polyamide alors que la fourrure de renfort 27 est métallique. Cette dernière est enfilée dans l'extrémité 28 du tube ou tuyau thermoplastique 26 et comporte un épaulement 29 contre lequel vient buter le chant 30 de l'extrémité 28 pour éviter que la fourrure de renfort 27 pénètre entièrement dans le tube ou tuyau thermoplastique 26. To perfect the junction between the safety fitting 1 and the thermoplastic tube or pipe 26, it is advantageously possible to provide a reinforcing fur 27. However, this reinforcing fur 27 is not essential for the proper functioning of the safety fitting 1. In generally, the thermoplastic tube or pipe 26 is made of polyamide while the reinforcing fur 27 is metallic. The latter is threaded into the end 28 of the thermoplastic tube or pipe 26 and has a shoulder 29 against which the edge 30 of the end 28 abuts to prevent the reinforcing fur 27 from fully penetrating the thermoplastic tube or pipe 26.
Cependant, le diamètre extérieur 31 de l'épaulement 29 est légèrement inférieur au diamètre extérieur 32 du tube ou tuyau thermoplastique 26. La fourrure de renfort 27 comporte à son autre extrémité 33 un anneau d'ancrage 34 comportant un embout tronconique 35 facilitant l'introduction de la fourrure de renfort 27 dans l'alésage 36 du tube ou tuyau thermoplastique 26. Cet embout tronconique 35 aboute à une paroi 37 perpendiculaire au pourtour 38 du corps 39 de la fourrure de renfort 27. De ce fait, après introduction de la fourrure de renfort 27 dans le tube ou tuyau thermoplastique 26, il devient pratiquement impossible de séparer ces deux éléments, cette paroi 37 s'y opposant.However, the outside diameter 31 of the shoulder 29 is slightly less than the outside diameter 32 of the thermoplastic tube or pipe 26. The reinforcement liner 27 has at its other end 33 an anchoring ring 34 comprising a frustoconical end piece 35 facilitating the introduction of the reinforcing fur 27 into the bore 36 of the thermoplastic tube or pipe 26. This frustoconical end piece 35 abuts a wall 37 perpendicular to the periphery 38 of the body 39 of the reinforcing fur 27. Therefore, after introduction of the reinforcing fur 27 in the thermoplastic tube or pipe 26, it becomes practically impossible to separate these two elements, this wall 37 opposing it.
Selon un autre mode de réalisation, le raccord de sécurité 1 peut être en outre utilisé avec des embouts de tube métallique pré-rainurés au droit de l'accrochage de la pince de retenue 10. Ce mode de réalisation permet, d'une part, des empilages de raccords pour éviter la réalisation de pièces spéciales et, d'autre part, obtenir des pièces de forme orientable et ceci dans les mêmes conditions de fiabilité. According to another embodiment, the safety connector 1 can also be used with end pieces of pre-grooved metal tube in line with the attachment of the retaining clamp 10. This embodiment allows, on the one hand, stacks of fittings to avoid the production of special parts and, on the other hand, obtain parts of orientable shape and this under the same conditions of reliability.
La liaison entre le raccord de sûreté 1 et le tube ou tuyau thermoplastique 26 se réalise de la façon suivante
on introduit la fourrure de renfort 27 dans l'alésage 36 du tube ou tuyau thermoplastique 26 jusqu a ce que le chant 30 de ce dernier vient buter contre l'épaulement 29. Puis, on introduit l'ensemble formé par le tube ou tuyau thermoplastique 26 et la fourrure de renfort 27 dans l'alésage 7 du corps 2 du raccord de sécurité 1 et ceci du côté du six pans 6. Au passage, le pourtour 40 du tube ou tuyau thermoplastique 26 écrase le joint torique 21 et l'extrémité 28 pénètre dans la pince de retenue 10. L'épaulement 29 de la fourrure de renfort 27 écrase le joint amortisseur 9 qui a tendance à repousser ladite fourrure de renfort 27 et, par voie de conséquence, le tube ou tuyau thermoplastique 26.Ce dernier a tendance-à exercer une traction sur la pince de retenue 10 et le bord tronconique 18 de cette dernière glisse sur l'alésage tronconique 17 de la première bague de serrage 16 en provoquant le rapprochement des mors 19, 20. De ce fait, on obtient un assemblage serré entre la pince de retenue 10 et le tube ou tuyau thermoplastique 26 et, par voie de conséquence, entre ce dernier et le raccord de sé cuité 1. L'action du joint amortisseur 9 sur la fourrure de renfort 27 est constante, les vibrations étant absorbées par ledit joint amortisseur 9.The connection between the safety connector 1 and the thermoplastic tube or pipe 26 is carried out as follows
the reinforcing fur 27 is introduced into the bore 36 of the thermoplastic tube or pipe 26 until the edge 30 of the latter abuts against the shoulder 29. Then, the assembly formed by the thermoplastic tube or pipe is introduced 26 and the reinforcing fur 27 in the bore 7 of the body 2 of the safety connector 1 and this on the side of the hexagon 6. In passing, the periphery 40 of the thermoplastic tube or pipe 26 crushes the O-ring 21 and the end 28 enters the retaining clip 10. The shoulder 29 of the reinforcing fur 27 crushes the shock-absorbing seal 9 which tends to repel said reinforcing fur 27 and, consequently, the thermoplastic tube or pipe 26. tends to exert traction on the retaining clamp 10 and the frustoconical edge 18 of the latter slides on the frustoconical bore 17 of the first clamping ring 16 causing the jaws 19, 20 to come together. obtains a tight connection between the retaining clamp enue 10 and the thermoplastic tube or pipe 26 and, consequently, between the latter and the safety connection 1. The action of the damping seal 9 on the reinforcing fur 27 is constant, the vibrations being absorbed by said seal shock absorber 9.
Bien que l'invention ait été décrite à propos d'une forme de réalisation particulière, il est bien entendu qu'elle n'y est nullement limitée et qu'on peut y apporter diverses modifications de formes, de matériaux et de combinaisons de ces divers éléments sans pour cela s'éloigner du cadre et de l'esprit de l'invention. Although the invention has been described in connection with a particular embodiment, it is understood that it is in no way limited thereto and that it is possible to make various modifications to the forms, materials and combinations of these. various elements without departing from the scope and spirit of the invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8406170A FR2562984A1 (en) | 1984-04-17 | 1984-04-17 | Safety connection for pneumatic circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8406170A FR2562984A1 (en) | 1984-04-17 | 1984-04-17 | Safety connection for pneumatic circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2562984A1 true FR2562984A1 (en) | 1985-10-18 |
Family
ID=9303294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8406170A Withdrawn FR2562984A1 (en) | 1984-04-17 | 1984-04-17 | Safety connection for pneumatic circuits |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2562984A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2420285A3 (en) * | 2010-08-18 | 2012-04-25 | Erbe Elektromedizin GmbH | Device for sealing connection of a pressure hose with a grip element or connector of a surgical instrument |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1966368A (en) * | 1932-06-13 | 1934-07-10 | Wil Bro Corp | Hose coupling and method of using the same |
| US2394351A (en) * | 1942-11-10 | 1946-02-05 | Paul D Wurzburger | Vibrationproof coupling |
| US2437632A (en) * | 1944-11-13 | 1948-03-09 | Parker Appliance Co | Coupling for tubes |
| GB1267007A (en) * | 1970-07-10 | 1972-03-15 | ||
| FR2255541A1 (en) * | 1973-12-21 | 1975-07-18 | Lotigie Ets | |
| FR2442394A1 (en) * | 1978-11-24 | 1980-06-20 | Legris | IMPROVEMENT IN FITTINGS FOR FLEXIBLE OR SEMI-FLEXIBLE TUBES |
| GB2073350A (en) * | 1980-03-28 | 1981-10-14 | Legris | Instant fittings for pipes and tubes |
-
1984
- 1984-04-17 FR FR8406170A patent/FR2562984A1/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1966368A (en) * | 1932-06-13 | 1934-07-10 | Wil Bro Corp | Hose coupling and method of using the same |
| US2394351A (en) * | 1942-11-10 | 1946-02-05 | Paul D Wurzburger | Vibrationproof coupling |
| US2437632A (en) * | 1944-11-13 | 1948-03-09 | Parker Appliance Co | Coupling for tubes |
| GB1267007A (en) * | 1970-07-10 | 1972-03-15 | ||
| FR2255541A1 (en) * | 1973-12-21 | 1975-07-18 | Lotigie Ets | |
| FR2442394A1 (en) * | 1978-11-24 | 1980-06-20 | Legris | IMPROVEMENT IN FITTINGS FOR FLEXIBLE OR SEMI-FLEXIBLE TUBES |
| GB2073350A (en) * | 1980-03-28 | 1981-10-14 | Legris | Instant fittings for pipes and tubes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2420285A3 (en) * | 2010-08-18 | 2012-04-25 | Erbe Elektromedizin GmbH | Device for sealing connection of a pressure hose with a grip element or connector of a surgical instrument |
| US9597491B2 (en) | 2010-08-18 | 2017-03-21 | Erbe Elektromedizin Gmbh | Device for the sealing connection of a pressure hose with a grip element or with a connector of a surgical instrument |
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| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |