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WO2002044604A1 - Multilayer pipe for transporting cooling liquid - Google Patents

Multilayer pipe for transporting cooling liquid Download PDF

Info

Publication number
WO2002044604A1
WO2002044604A1 PCT/FR2001/003702 FR0103702W WO0244604A1 WO 2002044604 A1 WO2002044604 A1 WO 2002044604A1 FR 0103702 W FR0103702 W FR 0103702W WO 0244604 A1 WO0244604 A1 WO 0244604A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
pipe
polyamide
cooling liquid
pipes
Prior art date
Application number
PCT/FR2001/003702
Other languages
French (fr)
Inventor
Jérôme GUIPPE
Original Assignee
Nobel Plastiques
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 Nobel Plastiques filed Critical Nobel Plastiques
Priority to EP01998763A priority Critical patent/EP1337777A1/en
Priority to AU2002222029A priority patent/AU2002222029A1/en
Publication of WO2002044604A1 publication Critical patent/WO2002044604A1/en

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
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
    • 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

Definitions

  • the present invention relates to a multilayer pipe which can be used in particular for transporting coolant in the cooling circuit of a heat engine, for example of a motor vehicle.
  • coolant transport pipes in an elastomeric thermoplastic material based on ethylene and polypropylene, for example of the EPDM type, possibly associated with a braided part.
  • Some pipes include a metal tube coated with a layer of EPDM. These pipes are relatively heavy and have a high rigidity which makes them difficult to install in the engine compartment of vehicles. These pipes are also subject to corrosion despite the presence of the EPDM layer.
  • a multilayer coolant transport pipe which comprises:
  • the pipe thus produced is relatively flexible, so that it can easily be installed in the hot forming jigs used to give it a particular geometry.
  • the inner layer acts as a vibration damper and generates little or no flow noise.
  • the intermediate layer in particular ensures the connection of the internal and external layers between them.
  • the outer layer is weldable and allows for example the attachment of lugs, and provides the pipe with good heat resistance and good chemical resistance
  • the pipe according to the invention is thus, among other things, perfectly suitable for installation in the engine compartment of motor vehicles.
  • the pipe here comprises three layers, namely an inner layer 1, an intermediate layer 2 and an outer layer 3.
  • the inner layer 1 is made of an elastomeric thermoplastic material based on polyolefin.
  • the elastomeric thermoplastic material is here a compound based on polyethylene-polypropylene-diene of EPDM type such as that referenced SANTOPRENE produced by the company AES or that produced under the reference SARLINK by the company DSM.
  • the intermediate layer 2 is based on a polyamide and a polyolefin.
  • the polyolefin is preferably polypropylene. This material is for example that referenced ORGALLOY produced by the company ATOFINA.
  • the outer layer is made of polyamide and here a polyamide 12.
  • the inner layer has a thickness of between 0.3 mm and 0.7 mm approximately
  • the intermediate layer 2 has a thickness of between 0.2 mm and 0.5 mm
  • the outer layer 3 a a thickness between 0.1 mm and 1 mm approximately. It is understood that these thicknesses are given for information only.
  • the thickness of the internal layer 1 is determined in particular as a function of the flexibility required for the pipe, the flexibility depending on the amplitude of the deflections and vibrations that the driving will have to undergo.
  • the thickness of the external layer 3 depends in particular on the material used and on the pressure and temperature conditions under which the pipe is brought to be used. The thicknesses of the different layers may also be modified depending on the diameter of the pipe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention concerns a multilayer pipe for transporting cooling liquid, comprising: an inner layer (1) made of thermoplastic elastomer based on an olefin copolymer; an intermediate layer (2) based on polyolefin and polyamide; an outer polyamide layer (3).

Description

Conduite multicouche de transport de liquide de refroidissement. Multilayer coolant transport pipe.
La présente invention concerne une conduite multicouche utilisable notamment pour le transport de liquide de refroidissement dans le circuit de refroidissement d'un moteur thermique, par exemple d'un véhicule automobile.The present invention relates to a multilayer pipe which can be used in particular for transporting coolant in the cooling circuit of a heat engine, for example of a motor vehicle.
De nombreuses structures de conduites de transport de liquide de refroidissement sont utilisées.Numerous structures for coolant transport pipes are used.
Il est notamment connu de réaliser des conduites de transport de liquide de refroidissement en un matériau thermoplastique élastomère à base d'éthylène et de polypropylène par exemple du type EPDM, éventuellement associé à une partie tressée.It is notably known to produce coolant transport pipes in an elastomeric thermoplastic material based on ethylene and polypropylene, for example of the EPDM type, possibly associated with a braided part.
Il est également connu des conduites comportant plusieurs couches réalisées en matériau thermoplastique souple et en matériau thermoplastique rigide qui sont disposées de façon alternée. Toutefois, il est nécessaire d'adjoindre aux couches en matériau souple une tresse métallique afin de limiter la dilatation radiale et l'allongement axial de celles-ci. Ces conduites sont complexes à mettre en oeuvre et nécessitent plusieurs opérations de fabrication.It is also known pipes comprising several layers made of flexible thermoplastic material and rigid thermoplastic material which are arranged alternately. However, it is necessary to add to the layers of flexible material a metallic braid in order to limit the radial expansion and the axial elongation thereof. These pipes are complex to implement and require several manufacturing operations.
On connaît d'autres conduites multicouches comportant une couche interne en matériau thermoplastique. La connexion de ces conduites aux embouts actuels (insérés à force dans la conduite) nécessite un raccord intermédiaire déformable.Other multilayer pipes are known which have an inner layer of thermoplastic material. The connection of these pipes to the current end pieces (force-fitted into the pipe) requires a deformable intermediate connection.
Certaines conduites comprennent un tube métallique revêtu d'une couche en EPDM. Ces conduites sont relativement lourdes et présentent une rigidité importante qui rend délicate leur implantation dans le compartiment moteur des véhicules. Ces conduites sont en outre sujettes à la corrosion malgré la présence de la couche en EPDM.Some pipes include a metal tube coated with a layer of EPDM. These pipes are relatively heavy and have a high rigidity which makes them difficult to install in the engine compartment of vehicles. These pipes are also subject to corrosion despite the presence of the EPDM layer.
D'autres conduites sont utilisées et par exemple des conduites monocouches en matériau thermoplastique et notamment en polyamide chargé de fibres de verre. Ces canalisations présentent également une rigidité importante. En outre, ces canalisations transmettent les vibrations du moteur et sont donc relativement bruyantes. De plus la circulation du fluide dans la conduite engendre des bruits d'écoulement.Other pipes are used and for example monolayer pipes of thermoplastic material and in particular in polyamide filled with glass fibers. These pipes also have significant rigidity. In addition, these pipes transmit engine vibrations and are therefore relatively noisy. In addition, the circulation of the fluid in the pipe generates flow noises.
D'autres de ces conduites comprennent un élastomère vulcanisé. Il est alors nécessaire d'utiliser une couche de liant pour assurer une bonne cohésion entre les couches thermoplastiques et la couche élastomère.Others of these lines include a vulcanized elastomer. It is then necessary to use a binder layer to ensure good cohesion between the thermoplastic layers and the elastomer layer.
Selon l'invention, on prévoit, un conduite multicouche de transport de liquide de refroidissement, qui comprend :According to the invention, a multilayer coolant transport pipe is provided, which comprises:
- une couche interne en un matériau thermoplastique élastomère à base d'un copolymère d' oléfine,an internal layer of an elastomeric thermoplastic material based on an olefin copolymer,
- une couche intermédiaire à base de polyoléfine et de polyamide,- an intermediate layer based on polyolefin and polyamide,
- une couche externe en polyamide. La conduite ainsi réalisée est relativement flexible, de sorte qu'elle peut facilement être mise en place dans les gabarits de formage à chaud utilisés pour lui donner une géométrie particulière. En outre, il est possible de réaliser des connexions avec les embouts utilisés actuellement (emmanchés à force dans la conduite) sans raccord intermédiaire. La couche interne exerce une fonction d'amortissement des vibrations et n'engendre pas ou peu de bruit d'écoulement. La couche intermédiaire assure en particulier la liaison des couches interne et externe entre elles. La couche externe est soudable et permet par exemple la fixation de pattes d'accrochage, et apporte à la conduite une bonne résistance à la chaleur et une bonne résistance chimique- an outer layer of polyamide. The pipe thus produced is relatively flexible, so that it can easily be installed in the hot forming jigs used to give it a particular geometry. In addition, it is possible to make connections with the ends currently used (force-fitted into the pipe) without an intermediate connection. The inner layer acts as a vibration damper and generates little or no flow noise. The intermediate layer in particular ensures the connection of the internal and external layers between them. The outer layer is weldable and allows for example the attachment of lugs, and provides the pipe with good heat resistance and good chemical resistance
(en particulier aux chlorures) . La conduite selon l'invention est de la sorte, entre autres, parfaitement adaptée à une implantation dans le compartiment moteur des véhicules automobiles.(especially chlorides). The pipe according to the invention is thus, among other things, perfectly suitable for installation in the engine compartment of motor vehicles.
D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description qui suit d'un mode de réalisation particulier non limitatif de l'invention.Other characteristics and advantages of the invention will emerge on reading the following description of a particular non-limiting embodiment of the invention.
Il sera fait référence à la figure unique annexée qui est une vue en coupe transversale d'une conduite conforme à l'invention. En référence à la figure et conformément à l'invention, la conduite comprend ici trois couches, à savoir une couche interne 1, une couche intermédiaire 2 et une couche externe 3.Reference will be made to the attached single figure which is a cross-sectional view of a pipe according to the invention. With reference to the figure and in accordance with the invention, the pipe here comprises three layers, namely an inner layer 1, an intermediate layer 2 and an outer layer 3.
La couche interne 1 est réalisée en un matériau thermoplastique élastomère à base de polyoléfine. Le matériau thermoplastique élastomère est ici un composé à base de polyéthylène-polypropylène-diène de type EPDM tel que celui référencé SANTOPRENE produit par la société AES ou celui produit sous la référence SARLINK par la société DSM.The inner layer 1 is made of an elastomeric thermoplastic material based on polyolefin. The elastomeric thermoplastic material is here a compound based on polyethylene-polypropylene-diene of EPDM type such as that referenced SANTOPRENE produced by the company AES or that produced under the reference SARLINK by the company DSM.
La couche intermédiaire 2 est à base d'un polyamide et d'une polyoléfine. La polyoléfine est de préférence du polypropylene. Ce matériau est par exemple celui référencé ORGALLOY produit par la société ATOFINA. La couche externe est en polyamide et ici un polyamide 12.The intermediate layer 2 is based on a polyamide and a polyolefin. The polyolefin is preferably polypropylene. This material is for example that referenced ORGALLOY produced by the company ATOFINA. The outer layer is made of polyamide and here a polyamide 12.
A titre d'exemple, la couche interne a une épaisseur comprise entre 0,3 mm et 0,7 mm environ, la couche intermédiaire 2 a une épaisseur comprise entre 0,2 mm et 0,5 mm environ et la couche externe 3 a une épaisseur comprise entre 0,1 mm et 1 mm environ. Il est bien entendu que ces épaisseurs sont données à titre indicatif. L'épaisseur de la couche interne 1 est déterminée notamment en fonction de la flexibilité requise pour la conduite, la flexibilité dépendant de l'amplitude des débattements et des vibrations que sera amenée à subir la conduite. L'épaisseur de la couche externe 3 dépend en particulier du matériau employé et des conditions de pression et de température dans lesquelles la conduite est amenée à être utilisée. Les épaisseurs des différentes couches pourront également être modifiées en fonction du diamètre de la conduite.For example, the inner layer has a thickness of between 0.3 mm and 0.7 mm approximately, the intermediate layer 2 has a thickness of between 0.2 mm and 0.5 mm and the outer layer 3 a a thickness between 0.1 mm and 1 mm approximately. It is understood that these thicknesses are given for information only. The thickness of the internal layer 1 is determined in particular as a function of the flexibility required for the pipe, the flexibility depending on the amplitude of the deflections and vibrations that the driving will have to undergo. The thickness of the external layer 3 depends in particular on the material used and on the pressure and temperature conditions under which the pipe is brought to be used. The thicknesses of the different layers may also be modified depending on the diameter of the pipe.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention tel que défini par les revendications. Of course, the invention is not limited to the embodiment described and it is possible to make variant embodiments without departing from the scope of the invention as defined by the claims.

Claims

REVENDICATIONS
1. Conduite multicouche de transport de liquide de refroidissement, caractérisée en ce qu'elle comprend : - une couche interne (1) en un matériau thermoplastique élastomère à base d'un copolymère d' oléfine,1. Multilayer coolant transport pipe, characterized in that it comprises: - an internal layer (1) made of an elastomeric thermoplastic material based on an olefin copolymer,
- une couche intermédiaire (2) à base de polyoléfine et de polyamide, - une couche externe (3) en polyamide.- an intermediate layer (2) based on polyolefin and polyamide, - an outer layer (3) in polyamide.
2. Conduite selon la revendication 1, caractérisée en ce que la couche intermédiaire (2) comprend du polypropylene .2. Pipe according to claim 1, characterized in that the intermediate layer (2) comprises polypropylene.
3. Conduite selon la revendication 1 ou la revendication 2, caractérisée en ce que le polyamide utilisé pour la couche externe (3) est un polyamide 12.3. Pipe according to claim 1 or claim 2, characterized in that the polyamide used for the outer layer (3) is a polyamide 12.
4. Conduite selon l'une quelconque des revendications précédentes, caractérisée en ce que la couche interne (1) a une épaisseur comprise entre 0,3 mm et 0,7 mm environ.4. Pipe according to any one of the preceding claims, characterized in that the internal layer (1) has a thickness of between 0.3 mm and 0.7 mm approximately.
5. Conduite selon l'une quelconque des revendications précédentes, caractérisée en ce que la couche intermédiaire (2) a une épaisseur comprise entre 0,2 mm et 0,5 mm environ. 5. Pipe according to any one of the preceding claims, characterized in that the intermediate layer (2) has a thickness of between 0.2 mm and 0.5 mm approximately.
6. Conduite selon l'une quelconque des revendications précédentes, caractérisée en ce que la couche externe (3) a une épaisseur comprise entre 0,1 mm et 1 mm environ. 6. Pipe according to any one of the preceding claims, characterized in that the external layer (3) has a thickness of between 0.1 mm and 1 mm approximately.
PCT/FR2001/003702 2000-11-29 2001-11-23 Multilayer pipe for transporting cooling liquid WO2002044604A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01998763A EP1337777A1 (en) 2000-11-29 2001-11-23 Multilayer pipe for transporting cooling liquid
AU2002222029A AU2002222029A1 (en) 2000-11-29 2001-11-23 Multilayer pipe for transporting cooling liquid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0015404A FR2817320B1 (en) 2000-11-29 2000-11-29 MULTI-LAYER COOLING PIPELINE
FR00/15404 2000-11-29

Publications (1)

Publication Number Publication Date
WO2002044604A1 true WO2002044604A1 (en) 2002-06-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2001/003702 WO2002044604A1 (en) 2000-11-29 2001-11-23 Multilayer pipe for transporting cooling liquid

Country Status (4)

Country Link
EP (1) EP1337777A1 (en)
AU (1) AU2002222029A1 (en)
FR (1) FR2817320B1 (en)
WO (1) WO2002044604A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006010736A1 (en) * 2004-07-26 2006-02-02 Degussa Ag Coolant line
EP4241977A1 (en) * 2022-03-10 2023-09-13 Arkema France Fireproof multilayer tubular structure for cooling batteries of an electric vehicle or stationary energy storage system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3875263A1 (en) 2020-03-06 2021-09-08 TI Automotive (Fuldabrück) GmbH Tube construct

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907625A (en) * 1987-12-28 1990-03-13 Tokai Rubber Industries, Ltd. Refregerant transporting hose
EP0428833A2 (en) * 1989-11-20 1991-05-29 Technoflow Tube-Systems GmbH Plastic vehicle conduit fabricated by coextrusion
US5167259A (en) * 1989-11-20 1992-12-01 Technoform Caprano & Brunnhofer Kg Three-layer fuel-line hose
FR2701302A1 (en) * 1993-02-05 1994-08-12 Nobel Plastiques Multilayer plastic pipe
EP0685674A1 (en) * 1994-05-31 1995-12-06 Hutchinson Fuel conducting pipe
US5850855A (en) * 1990-01-09 1998-12-22 Ems-Inventa Ag Flexible coolant conduit and method of making same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907625A (en) * 1987-12-28 1990-03-13 Tokai Rubber Industries, Ltd. Refregerant transporting hose
EP0428833A2 (en) * 1989-11-20 1991-05-29 Technoflow Tube-Systems GmbH Plastic vehicle conduit fabricated by coextrusion
US5167259A (en) * 1989-11-20 1992-12-01 Technoform Caprano & Brunnhofer Kg Three-layer fuel-line hose
US5850855A (en) * 1990-01-09 1998-12-22 Ems-Inventa Ag Flexible coolant conduit and method of making same
FR2701302A1 (en) * 1993-02-05 1994-08-12 Nobel Plastiques Multilayer plastic pipe
EP0685674A1 (en) * 1994-05-31 1995-12-06 Hutchinson Fuel conducting pipe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006010736A1 (en) * 2004-07-26 2006-02-02 Degussa Ag Coolant line
US7939151B2 (en) 2004-07-26 2011-05-10 Evonik Degussa Gmbh Coolant line
EP4241977A1 (en) * 2022-03-10 2023-09-13 Arkema France Fireproof multilayer tubular structure for cooling batteries of an electric vehicle or stationary energy storage system
WO2023170366A1 (en) * 2022-03-10 2023-09-14 Arkema France Fireproofed multilayer tubular structure for cooling electric vehicle batteries or stationary energy storage system batteries
FR3133336A1 (en) * 2022-03-10 2023-09-15 Arkema France FIREPROOF MULTILAYER TUBULAR STRUCTURE FOR COOLING ELECTRIC VEHICLE BATTERIES OR STATIONARY ENERGY STORAGE SYSTEMS

Also Published As

Publication number Publication date
FR2817320A1 (en) 2002-05-31
EP1337777A1 (en) 2003-08-27
FR2817320B1 (en) 2004-09-24
AU2002222029A1 (en) 2002-06-11

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