FR2615266A1 - Device for connecting a flexible duct onto a rigid end-fitting - Google Patents

Device for connecting a flexible duct onto a rigid end-fitting Download PDF

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Publication number
FR2615266A1
FR2615266A1 FR8706631A FR8706631A FR2615266A1 FR 2615266 A1 FR2615266 A1 FR 2615266A1 FR 8706631 A FR8706631 A FR 8706631A FR 8706631 A FR8706631 A FR 8706631A FR 2615266 A1 FR2615266 A1 FR 2615266A1
Authority
FR
France
Prior art keywords
sheath
fitting
stop
end piece
rigid end
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
FR8706631A
Other languages
French (fr)
Other versions
FR2615266B1 (en
Inventor
Yves Quintalet
Gilles Marie
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR8706631A priority Critical patent/FR2615266B1/en
Publication of FR2615266A1 publication Critical patent/FR2615266A1/en
Application granted granted Critical
Publication of FR2615266B1 publication Critical patent/FR2615266B1/en
Expired legal-status Critical Current

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
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members
    • F16L33/207—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
    • F16L33/2071—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member
    • F16L33/2073—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member
    • F16L33/2076—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member by plastic deformation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00557—Details of ducts or cables
    • B60H1/00571—Details of ducts or cables of liquid ducts, e.g. for coolant liquids or refrigerants
    • 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
    • F16L31/00—Arrangements for connecting hoses to one another or to flexible sleeves

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Device for the sealed connection of at least one flexible duct onto a rigid end-fitting, particularly applied to the circulation of a cooling or heating fluid in a motor vehicle. The flexible duct 1 is slipped onto the rigid end-fitting 2 over its bead 4 and as far as its stop 3, a heat-shrinkable sheath 5-42-56 covering the aforementioned elements being heated up to its critical temperature in order to activate it and ensure, by its shrinking, sealing between the components to be connected. Application to cooling or air-conditioning circuits.

Description

DISPOSITIF DE RACCORDEMENT D' UN CONDUIT SOUPLE
SUR UN EMBOUT RIGIDE
La présente invention se rapporte à la réalisation d' un dispositif de raccordement étanche d1 un conduit souple en élastomère ou en matière synthétique sur un embout rigide, du type appliqué pour les circuits de refroidissement ou de climatisation, notamment sur des véhicules automobiles.DEVICE FOR CONNECTING A FLEXIBLE CONDUIT
ON A RIGID MOUTHPIECE
The present invention relates to the production of a sealed connection device for a flexible elastomer or synthetic material duct on a rigid end piece, of the type applied for cooling or air conditioning circuits, in particular on motor vehicles.

On utilise généralement, dans le cas d' une liaison du type ci-dessus, des colliers de serrage métalliques qui présentent certains inconvénients - leurs pressions de serrage périphériques ne sont pas uniformes, - ils nécessitent une orientation précise au montage, - ils présentent un encombrement important, - ils sont d' un prix élevé.Generally used, in the case of a connection of the above type, metal clamps which have certain drawbacks - their peripheral clamping pressures are not uniform, - they require a precise orientation during assembly, - they have a large size, - they are expensive.

Par ailleurs, les différences de coefficients de dilatation entre ie métal qui les constitue et les matières synthétiques utilisées pour 1' embout rigide et le conduit souple entraînent soit un trop fort serrage du caoutchouc qui se dégrade alors, soit un serrage trop faible ; dans les deux cas, des fuites sont ainsi provoquées.In addition, the differences in expansion coefficients between the metal which constitutes them and the synthetic materials used for the rigid end piece and the flexible conduit cause either a too strong tightening of the rubber which then degrades, or a too weak tightening; in both cases, leaks are thus caused.

La présente invention a pour but un dispositif de raccordement étanche en matière synthétique palliant les inconvénients cidessus ; il sera décrit à titre d'exemple non limitatif au regard- des figures 1 à 6 ci-)ointes, qui se rapportent respectivement : - les figures 1 et 2, à une vue en coupe longitudinale du dispositif de
raccordement selon l'invention, respectivement avant et après serrage, - la figure 3, à une vue de côté du dispositif de la figure 2, - la figure 4, à une vue en coupe longitudinale d' une première variante
selon 1' invention, - les figures 5 et 6, à des vues analogues d' une seconde variante,
respectivement avant et après serrage. The object of the present invention is to provide a sealed connection device made of synthetic material which overcomes the above drawbacks; it will be described by way of nonlimiting example with regard to FIGS. 1 to 6 below) anointed, which relate respectively: - FIGS. 1 and 2, to a view in longitudinal section of the device
connection according to the invention, respectively before and after tightening, - Figure 3, to a side view of the device of Figure 2, - Figure 4, to a longitudinal sectional view of a first variant
according to the invention, FIGS. 5 and 6, to similar views of a second variant,
before and after tightening respectively.

En référence aux figures 1 à 3, on voit la mise en position des deux éléments à moindre, respectivement un tuyau souple l de préférence en élastomère et d' un embout rigide 2 en métal, en polyamide, ou encore en polypropylène ; ce dernier comporte une butée 3 et un bourrelet 4 disposé à sa Dartie antérieure. Les deux éléments l et 2 étant en position, on dispose au niveau de la ponction une portion de gaine thermorétractable 5, constituée en un matériau tel que du polyéthylène ou du PVC non stabilisé.With reference to FIGS. 1 to 3, we can see the positioning of the two lower elements, respectively a flexible pipe l, preferably made of elastomer and of a rigid end piece 2 made of metal, polyamide, or even polypropylene; the latter comprises a stop 3 and a bead 4 disposed at its anterior Dartie. The two elements 1 and 2 being in position, there is at the puncture a portion of heat-shrinkable sheath 5, made of a material such as polyethylene or unstabilized PVC.

Comme on le voit bien à la figure 3, la gaine comporte au moins à l' une de ses extrémités et de préférence du coté du tuyau souple l des pattes de préhension 6 résultant du découpaee et du retournement de l'extrémité correspondante. Ces pattes 6 déterminent entre elles des amorces de rupture longitudinales permettant 1' élimination d' une gaine 5 usagée ; ces amorces sont situées en amont des zones de rétraction afin d'éviter tout déchirement intempestif.As can be seen in Figure 3, the sheath has at least at one of its ends and preferably on the side of the flexible tube l of the gripping tabs 6 resulting from the cutting and the inversion of the corresponding end. These tabs 6 determine between them longitudinal incipient fractures allowing the elimination of a used sheath 5; these primers are located upstream of the retraction zones in order to avoid any untimely tearing.

Le serrage de l' ensemble ci-dessus se fait par chauffage de la gaine thermorétractable 5 auZessus de sa température critique, ce qui détermine ainsi sa contraction autour des éléments l et 2 ; cette action est complétée par la circulation interne du liquide chaud transporté.The above assembly is tightened by heating the heat-shrinkable sheath 5 above its critical temperature, which thus determines its contraction around the elements l and 2; this action is completed by the internal circulation of the hot liquid transported.

Au niveau du bourrelet 4, on obtient un premier niveau d' étanchéité ; de plus, sous l'influence de la contraction de la gaine 5, la totalité de la longueur du tuyau l en contact avec l' embout 2 est serrée de manière homogène et avec un effort périphérique constant, ce qui constitue un second niveau d' étanchéité ; enfin, un troisème est réalisé par emprisonnement de la butée 3 au moyen de l'extrémité correspondante de ladite gaine 5, comme représenté aux figures 2 et 3.At the bead 4, a first level of tightness is obtained; moreover, under the influence of the contraction of the sheath 5, the entire length of the pipe l in contact with the end piece 2 is tightened in a homogeneous manner and with a constant peripheral force, which constitutes a second level of sealing; finally, a third is produced by confining the stop 3 by means of the corresponding end of said sheath 5, as shown in FIGS. 2 and 3.

Le dispositif illustré à la figure 4 permet la connexion de deux tuyaux souples 40 de même diamètre, par l'intermédiaire d'un double embout rigide 41 et d'une gaine thermorétractable 42. L'embout 41 comporte une butée 43 pour les extrémités des tuyaux 40, et deux bourrelets 44. La gaine est pourvue à 1' une au moins de ses extrémités de pattes 45 ; après chauffage, elle se rétracte en assurant comme dans le cas des figures précédentes, I' étanchéité du système résultant notamment de la coopération avec la butée 43, les bourrelets 44 et les tuyaux 40. The device illustrated in FIG. 4 allows the connection of two flexible pipes 40 of the same diameter, by means of a rigid double end piece 41 and a heat-shrinkable sheath 42. The end piece 41 includes a stop 43 for the ends of the pipes 40, and two beads 44. The sheath is provided with at least one of its ends of lugs 45; after heating, it retracts, ensuring, as in the case of the preceding figures, the tightness of the system resulting in particular from cooperation with the stop 43, the beads 44 and the pipes 40.

La variante de l'invention illustrée aux figures 5 et 6 permet de oindra des tuyaux souples 50-51 de diamètres différents ; l'embout rigide 5S présente alors deux parties étagées de diamètres appropriés 52 et 53 séparées par la butée 54, au niveau de laquelle sont emmanchées les extrémités à loindre des tuyaux souples 50-51. L'embout 51 présente comme précédemment un bourrelet 55 à chacune de ses extrémités libres.The variant of the invention illustrated in FIGS. 5 and 6 makes it possible to anoint flexible pipes 50-51 of different diameters; the rigid end piece 5S then has two stepped parts of appropriate diameters 52 and 53 separated by the stop 54, at which the ends of the flexible pipes 50-51 are fitted. The end piece 51 has, as before, a bead 55 at each of its free ends.

Une gaine thermorétractable 56, possédant des pattes 57, assure après contraction l'étanchéité du système dans les mêmes conditions que précédemment décrites. A heat-shrinkable sheath 56, having tabs 57, ensures after contraction the tightness of the system under the same conditions as previously described.

On notera que le raccordement selon l'invention ne pose plus de problème d' étanchéité sous l'influence des changements de température, puisque la dilatation de l' embout rigide entraînera une variation de dilatation similaire des tuyaux souples, sans les détériorations délà mentionnées résultant de l' emploi des -colliers métalliques.It will be noted that the connection according to the invention no longer poses a sealing problem under the influence of temperature changes, since the expansion of the rigid end piece will cause a similar variation in expansion of the flexible pipes, without the damage mentioned above resulting of the use of metal clamps.

De plus, les caractéristiques thermorétractables -de la gaine périphérique permettent de maintenir un resserrage constant, malgré les variations de température de 1' environnement, ce qui entraîne de remarquables performances au niveau de l' étanchéité. In addition, the heat-shrinkable characteristics of the peripheral sheath make it possible to maintain a constant tightening, despite the variations in temperature of the environment, which results in remarkable performances in terms of sealing.

Claims (3)

REVENDICATIONS 1/ Dispositif de raccordement étanche d' au moins un conduit souple sur1 / Sealed connection device for at least one flexible conduit on un embout rigide, notamment appliqué à la circulation d' un fluide de a rigid nozzle, in particular applied to the circulation of a fluid refroidissement ou de réchauffement dans un véhicule automobile, cooling or warming in a motor vehicle, caractérisé par le fait que le conduit souple (1) est glissé sur characterized in that the flexible conduit (1) is slid over I' embout rigide (2) par dessus son bourrelet (4) et -lusqul à sa butée (3), I 'rigid tip (2) over its bead (4) and -lusqul at its stop (3), une gaine thermorétractable (5-42-56) recouvrant les éléments a heat-shrinkable sheath (5-42-56) covering the elements précédents étant chauffée jusqu' à sa température critique afin de above being heated to its critical temperature in order to I' activer et d' assurer par son rétrécissement l' étanchéité entre les I activate and ensure by its narrowing the seal between the pièces à raccorder. parts to be connected. 2/ Dispositif selon la revendication 1, caractérisé en ce que la gaine 2 / Device according to claim 1, characterized in that the sheath présente au moins à l' une de ses extrémités des pattes de préhension has at least one of its ends gripping tabs (6) obtenues par découpage et enlèvement de matière à l' extérieur de (6) obtained by cutting and removing material outside of la zone de recouvrement des pièces (1-2) à raccorder, déterminant the overlap area of the parts (1-2) to be connected, determining ainsi des amorces de rupture longitudinales permettant 1' élimination thus longitudinal fracture primers allowing elimination ultérieure éventuelle d' une gaine usagée. possible later of a used sheath. 31 Dispositif selon la revendication 1, caractérisé en ce que la gaine 31 Device according to claim 1, characterized in that the sheath (5-42-56) est constituée en un matériau synthétique du type (5-42-56) is made of a synthetic material of the type polyéthylène ou PVC non stabilisé. unstabilized polyethylene or PVC. 4/ Dispositif selon la revendication I, caractérisé en ce que l'embout (41)4 / Device according to claim I, characterized in that the end piece (41) est double, et comporte deux bourrelets (44) disposés de part et is double, and has two beads (44) arranged on the side and d' autre de la butée (43). on the other of the stop (43). 5/ Dispositif selon la revendication 1, caractérisé en ce que l'embout (51)5 / Device according to claim 1, characterized in that the end piece (51) est double, et constitué de deux corps (52-53) de diamètres différents.  is double, and made up of two bodies (52-53) of different diameters.
FR8706631A 1987-05-12 1987-05-12 DEVICE FOR CONNECTING A FLEXIBLE CONDUIT TO A RIGID TIP Expired FR2615266B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8706631A FR2615266B1 (en) 1987-05-12 1987-05-12 DEVICE FOR CONNECTING A FLEXIBLE CONDUIT TO A RIGID TIP

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8706631A FR2615266B1 (en) 1987-05-12 1987-05-12 DEVICE FOR CONNECTING A FLEXIBLE CONDUIT TO A RIGID TIP

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FR2615266A1 true FR2615266A1 (en) 1988-11-18
FR2615266B1 FR2615266B1 (en) 1989-08-18

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507978A1 (en) * 1991-04-12 1992-10-14 COHNEN BETEILIGUNGS-GMBH & CO. KG Hose connection
WO1996013682A1 (en) * 1994-10-31 1996-05-09 Veritas Gummiwerke Ag Hose connector
FR2728672A1 (en) * 1994-12-22 1996-06-28 Valeo Thermique Habitacle HEAT EXCHANGER WITH EMBOITE TUBULAR ELEMENTS, IN PARTICULAR FOR MOTOR VEHICLES, AND METHOD OF MANUFACTURE
EP0747620A2 (en) * 1992-07-07 1996-12-11 Stebi-Tech Ag Pipe coupling device
DE29708422U1 (en) * 1997-05-13 1997-07-17 Fahrzeugtechnik Ebern Gmbh, 96106 Ebern Connection fitting for hoses
WO1997047908A1 (en) * 1996-06-10 1997-12-18 Hutchinson Quick connection device for fluid conduit under pressure
DE29815359U1 (en) 1998-08-27 1998-11-19 ITT Manufacturing Enterprises, Inc., Wilmington, Del. Connection device for hoses
US6206430B1 (en) * 1999-07-07 2001-03-27 Inter-Med, Llc. Connector and attachment mechanism for a lumen
DE102004046058A1 (en) * 2004-09-21 2006-03-23 Behr Gmbh & Co. Kg Connection of two air-conducting components of a ventilation system, in particular a motor vehicle ventilation system
FR2888306A1 (en) * 2005-07-05 2007-01-12 Trelleborg Fluid & Acoustic Solutions Tfas Flexible tube and connection piece e.g. end piece, joining device, has heat shrinkable sheath type maintenance piece positioned around joining zone of tube and connection piece and shrunk by heating when tube is vulcanized
US9719622B2 (en) 2013-07-08 2017-08-01 Georg Fischer Harvel Llc Electrofusion fittings and methods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH334763A (en) * 1955-12-12 1958-12-15 Forster Ulrich Method for producing a pipe connection and connecting sleeve used for carrying out the method
GB839743A (en) * 1955-07-02 1960-06-29 Evered & Co Ltd Improvements in or relating to pipe joints
DE2615723A1 (en) * 1975-04-09 1976-10-14 Raychem Corp COUPLING DEVICE
DE8236832U1 (en) * 1982-12-30 1983-07-28 Kabel- und Metallwerke Gutehoffnungshütte AG, 4500 Osnabrück PIPE CONNECTION FOR A HOT WATER FLOOR HEATING
DE3306832A1 (en) * 1983-02-26 1984-08-30 Friedrich Theysohn GmbH, 3320 Salzgitter Device for connecting two pipes consisting of plastic
EP0157640A2 (en) * 1984-04-04 1985-10-09 RAYCHEM CORPORATION (a Delaware corporation) Heat recoverable articles comprising conductive polymer compositions

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB839743A (en) * 1955-07-02 1960-06-29 Evered & Co Ltd Improvements in or relating to pipe joints
CH334763A (en) * 1955-12-12 1958-12-15 Forster Ulrich Method for producing a pipe connection and connecting sleeve used for carrying out the method
DE2615723A1 (en) * 1975-04-09 1976-10-14 Raychem Corp COUPLING DEVICE
DE8236832U1 (en) * 1982-12-30 1983-07-28 Kabel- und Metallwerke Gutehoffnungshütte AG, 4500 Osnabrück PIPE CONNECTION FOR A HOT WATER FLOOR HEATING
DE3306832A1 (en) * 1983-02-26 1984-08-30 Friedrich Theysohn GmbH, 3320 Salzgitter Device for connecting two pipes consisting of plastic
EP0157640A2 (en) * 1984-04-04 1985-10-09 RAYCHEM CORPORATION (a Delaware corporation) Heat recoverable articles comprising conductive polymer compositions

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507978A1 (en) * 1991-04-12 1992-10-14 COHNEN BETEILIGUNGS-GMBH & CO. KG Hose connection
EP0747620A2 (en) * 1992-07-07 1996-12-11 Stebi-Tech Ag Pipe coupling device
EP0747620A3 (en) * 1992-07-07 1996-12-18 Stebi-Tech Ag Pipe coupling device
WO1996013682A1 (en) * 1994-10-31 1996-05-09 Veritas Gummiwerke Ag Hose connector
FR2728672A1 (en) * 1994-12-22 1996-06-28 Valeo Thermique Habitacle HEAT EXCHANGER WITH EMBOITE TUBULAR ELEMENTS, IN PARTICULAR FOR MOTOR VEHICLES, AND METHOD OF MANUFACTURE
WO1997047908A1 (en) * 1996-06-10 1997-12-18 Hutchinson Quick connection device for fluid conduit under pressure
US6012743A (en) * 1996-06-10 2000-01-11 Hutchinson Quick connection device for fluid conduit under pressure
DE29708422U1 (en) * 1997-05-13 1997-07-17 Fahrzeugtechnik Ebern Gmbh, 96106 Ebern Connection fitting for hoses
EP0879984A2 (en) * 1997-05-13 1998-11-25 FTE automotive GmbH Connecting device for hoses
EP0879984A3 (en) * 1997-05-13 2000-08-30 FTE automotive GmbH Connecting device for hoses
DE29815359U1 (en) 1998-08-27 1998-11-19 ITT Manufacturing Enterprises, Inc., Wilmington, Del. Connection device for hoses
US6206430B1 (en) * 1999-07-07 2001-03-27 Inter-Med, Llc. Connector and attachment mechanism for a lumen
DE102004046058A1 (en) * 2004-09-21 2006-03-23 Behr Gmbh & Co. Kg Connection of two air-conducting components of a ventilation system, in particular a motor vehicle ventilation system
FR2888306A1 (en) * 2005-07-05 2007-01-12 Trelleborg Fluid & Acoustic Solutions Tfas Flexible tube and connection piece e.g. end piece, joining device, has heat shrinkable sheath type maintenance piece positioned around joining zone of tube and connection piece and shrunk by heating when tube is vulcanized
US9719622B2 (en) 2013-07-08 2017-08-01 Georg Fischer Harvel Llc Electrofusion fittings and methods

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