EP3077716A1 - Ensemble raccord de tuyau flexible et procédé d'établissement de raccord de tuyau - Google Patents

Ensemble raccord de tuyau flexible et procédé d'établissement de raccord de tuyau

Info

Publication number
EP3077716A1
EP3077716A1 EP14815595.5A EP14815595A EP3077716A1 EP 3077716 A1 EP3077716 A1 EP 3077716A1 EP 14815595 A EP14815595 A EP 14815595A EP 3077716 A1 EP3077716 A1 EP 3077716A1
Authority
EP
European Patent Office
Prior art keywords
hose
coupling assembly
hose coupling
receptacle
sleeve
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Withdrawn
Application number
EP14815595.5A
Other languages
German (de)
English (en)
Inventor
Sascha Hermann
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.)
Eaton Industrial IP GmbH and Co KG
Original Assignee
Eaton Industrial IP GmbH and Co KG
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 Eaton Industrial IP GmbH and Co KG filed Critical Eaton Industrial IP GmbH and Co KG
Publication of EP3077716A1 publication Critical patent/EP3077716A1/fr
Withdrawn legal-status Critical Current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
    • F16L33/34—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with bonding obtained by vulcanisation, gluing, melting, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • 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

Definitions

  • the present application relates to a hose coupling assembly and, more specifically, to a hose coupling assembly for use in high performance fluid systems, such as air conditioning systems for vehicles.
  • Fluid conveying hose coupling assemblies are well known in the art for transferring a fluid between two or more components that cannot be linked by a rigid conduit. Due to an increased demand for higher performance fluid systems, it is becoming increasingly difficult for traditional hose coupling assemblies to satisfactorily operate without leakage, particularly in high pressure fluid systems that convey a fluid that is notoriously difficult to contain, such as a refrigerant. In addition, especially in the automotive sec- tor, there is an increasing demand of fluid conveying hose coupling assemblies being cost efficient, easy to assemble and reliable.
  • Conventional hose coupling assemblies usually comprise a hose coupling having a connecting nipple and a compression sleeve which is used to hold the hose to be con- nected on the nipple.
  • a connection is disclosed in US 2008/0309075 Al wherein the connecting nipple is provided with an annular ring which is encompassed by a plastically deformed connecting area of the compression sleeve.
  • the connecting area secures the compression sleeve on the connecting nipple in a form-closed manner.
  • the hose fitting section of the compression sleeve presses the hose against the peripheral surface of the connecting nipple, thus securing said connecting nipple in a sealed manner.
  • hose coupling assembly of this type is disclosed in US 2009/0026760 Al also comprising a hose coupling having a connecting nipple and a compression sleeve wherein the hose is securely pressed onto the outer peripheral surface of the connecting nipple by the compression sleeve.
  • a sealing ring is provided between the hose and the outer peripheral surface of the connecting nipple.
  • the sealing nipple is inserted into the hose the inner diameter of the hose and the inner diameter of the connecting nipple are different.
  • the inner diameter of the connecting nipple is smaller than the inner diameter of the hose so that a fluid flow is subject to a pressure drop over the hose coupling assembly.
  • a number of separate parts have to be provided in order to establish a coupling between the hose coupling and the hose.
  • an object of the present invention to provide a hose coupling assembly having a smaller pressure drop in the fluid flow and enabling an easy assembly and having reliable sealing properties.
  • the hose coupling assembly comprises a hose for conveyance of a fluid, said hose having a hose end with an outer surface; and a hose coupling having a sleeve portion with a receptacle having an inner surface for receiving said hose end, said outer sur- face of the hose end being adhesively bonded to the inner surface of the sleeve portion.
  • the adhesively bonded connection between the outer surface of the hose and the inner surface of the receptacle provides for a reliable sealing characteristic of the hose coupling assembly without the necessity to provide a separate sealing element such as an O-ring.
  • the hose coupling assembly according to the invention does not comprise a connecting nipple having a sealing contact between the inner surface of the hose end and the outer surface of the connecting nipple.
  • the sealing property is established between the outer surface of the hose end and the inner surface of the receptacle. Hence, it is not necessary to provide a further element pressing the hose against a sealing surface of the hose coupling.
  • the hose end is supported against the hose coupling solely with its outer surface.
  • the inner diameter of the receptacle may be slightly bigger than the outer diameter of the hose end.
  • the sleeve portion is crimped onto the hose after the hose end has been inserted into the receptacle.
  • crimping means that the diameter of the sleeve portion is decreased so that also the inner diameter of the receptacle is decreased.
  • the diameter is only decreased in such an amount that a press-fit between the hose end and the receptacle is established. It should be avoided to crimp the sleeve portion to an amount that the tube end collapses.
  • a supporting sleeve may be provided which is press-fit into and/or adhesively bonded to the hose end.
  • the supporting sleeve serves to increase the radial stability of the hose end.
  • the supporting sleeve is adhesively bonded within the hose end.
  • the hose end may be provided with at least one aperture in an outer surface so that the elastic material of the hose end can be pressed into the at least one aperture when crimping the sleeve portion of the hose coupling and providing a better fit of the supporting sleeve within the hose end.
  • the hose coupling has a channel portion with a fluid channel for a flow of fluid, said fluid channel being connected to the hose for conveyance of the fluid.
  • the fluid channel can be at one end of the hose coupling and the sleeve portion at an opposite end of the hose coupling wherein the fluid channel can be further connected to a component of a fluid circuit.
  • the inner diameter of the fluid channel is preferably smaller than the inner diameter of the sleeve portion, particularly in such an amount that the fluid channel has substantially the same inner diameter as the hose. Thereby, a pressure drop is decreased or even avoided compared to conventional hose coupling assemblies.
  • the fluid channel can be formed integrally with the sleeve portion, so that the hose coupling is one piece.
  • the object is also solved by a method for establishing a hose connection comprising the steps of providing a hose having a hose end with an outer surface; providing a hose coupling having a sleeve portion with a receptacle having an inner surface; inserting said hose into the receptacle of the sleeve portion; and adhesively bonding the outer surface of the tube end to the inner surface of the sleeve portion.
  • the adhesively bonding can be enabled by applying adhesive coating to at least one of the group comprising the inner surface of the receptacle and the outer surface of the hose end before inserting the tube into the receptacle.
  • the adhesive coating is a hot-melt adhesive, such as a phenolic resin.
  • the adhesive coating can be applied by spraying, rolling or varnishing or any other well known process for applying a coating or dye.
  • the method further comprises heating the hose coupling with inserted hose to a temperature fusing the hot-melt adhesive.
  • a support sleeve may be inserted into the hose end before inserting the sleeve portion onto the hose end.
  • the support sleeve can be pressed into the hose end in order to provide a press-fit.
  • the method may further or alternatively comprise applying an adhesive coating on at least one of the group comprising an outer surface of the support sleeve and an inner surface of the tube end.
  • Figure 1 is a partial longitudinal sectional view of a first embodiment of a hose coupling assembly
  • Figure 2 is a partial longitudinal sectional view of a second embodiment of a hose coupling assembly.
  • Figure 3 is a perspective view of a support sleeve according to Figure 2.
  • the hose coupling assembly comprises a hose coupling 1 and a connection element 3.
  • the hose coupling assembly further comprises a high pressure hydraulic hose 9 which is joined to a sleeve portion 2 of the hose coupling 1 and which can be part of, for example, a fluid circuit of an air conditioning system.
  • the hose coupling 1 and the connection element 3 are connected by brazing but can also be made as an integral part in one piece.
  • the sleeve portion 2 of the hose coupling 1 has a receptacle 4 which opens towards a first end 5 of the hose coupling assembly.
  • the connection element 3 comprises a channel portion 6 with fluid channel 7.
  • the fluid channel 7 opens to a second end 8 of the hose coupling assembly which is opposite to the first end 5.
  • the fluid channel 7 merges into a tube end 13 of the hose coupling 1 and the tube end 13 merges into the receptacle 4 for conveyance of a fluid between the first end 5 and the second end 8.
  • the hose 9 is inserted into the receptacle 4 with a hose end 10 and is joined to the sleeve portion 2 of the hose coupling 1.
  • the inner diameter Di of the receptacle 4 is slightly bigger than the outer diameter D 2 of the hose end 10 so that the hose end 10 can easily been inserted into the receptacle 4.
  • the outer surface 11 of the tube end 10 is adhesively bonded to the inner surface 12 of the receptacle 4.
  • the outer surface 11 of the tube end 10 and/or the inner surface 12 of the receptacle 4 are provided with a coating of an adhesive, preferably a hot-melt adhesive.
  • an adhesive preferably a hot-melt adhesive.
  • the adhesive preferably is a hot-melt adhesive so that for bonding the hose end 10 to the receptacle 4 the hose coupling assembly has to be heated to a temperature at which the adhesive coating or coatings melt and are fused to join the outer surface 11 of the hose end 10 with the inner surface 12 of the receptacle 4.
  • the advantage of this embodiment is that the hose coupling 1 does not have a connection nipple which is inserted into the hose end 10 which would result to a fluid channel portion within the connection nipple having a smaller diameter than the hose. This would result to a pressure drop within the fluid flow over the hose coupling assembly.
  • a pressure drop can further be limited or avoided with a design according to Figure 2 which provides a receptacle 4 having a bigger inner diameter Di than the inner diameter D 3 of the fluid channel 7 such that the inner diameter D 4 of the hose 9 is substan- tially the same as the inner diameter D 3 of the fluid channel 7.
  • the inner diameter D 4 of the hose 9 can also be bigger or smaller than the inner diameter D of the fluid channel 7.
  • the main advantage is that no further elements such as a coupling nipple is inserted into the hose end 10 so that a further diameter reduction of the over all fluid channel is avoided.
  • the inner diam- eter D of the fluid channel 7 is substantially the same as the inner diameter D 4 of the hose 9 and the inner diameter of the tube end 13 of the hose coupling 1.
  • connection element 3 further comprises a flange 14 for connecting the hose coupling assembly to a connecting object such as a component of an air conditioning sys- tern.
  • a connecting object such as a component of an air conditioning sys- tern.
  • the flange 14 is provided with a fixation bore 15 orientated parallel to the longitudinal axis L.
  • a screw can be inserted through the fixation bore 15 in order to fix the flange 14 to the connection object (not shown).
  • the flange 14 is positioned between the second end 8 of the hose coupling assembly and the sleeve portion 2, wherein the channel portion 6 projects from the flange 14 in a longitudinal direction towards the second end 8.
  • the channel portion 6 can be inserted into a part of the connection object in order to convey fluid from the hose coupling assembly to the connection object.
  • the channel portion 6 has an outer circumferential groove 16 for accommodating a sealing ring such as an O-ring (not shown).
  • a sealing ring such as an O-ring (not shown).
  • the hose coupling assembly is provided with a supporting sleeve 17 which is inserted into the hose end 10.
  • the supporting sleeve 17 is preferably press-fit into the hose end 10 in order to provide a reliable connection between the supporting sleeve 17 and the hose end 10.
  • the supporting sleeve 17 can be adhesively bonded within the hose end 10.
  • the inner surface 21 of the hose end 10 and/or the outer surface 18 of supporting sleeve 17 are provided with an adhesive coating such as a hot-melt adhesive.
  • the adhesive coating can be identical to the adhesive coating used for bonding the hose end 10 within the receptacle 4.
  • the supporting sleeve 17 can be provided with apertures 20 as disclosed in Figures 2 and 3 which reach from the inner surface 19 of the supporting sleeve 17 to the outer surface 18 of the supporting sleeve 17 and which are distributed about the circumference of the supporting sleeve 17.
  • the supporting sleeve 17 supports the hose end 10 in order to avoid a collapse of the hose end 10. Therefore, it is possible to provide a higher pressure between the inner surface 12 of the receptacle 4 and the outer surface 11 of the hose end 10.
  • the apertures 20 provide a better fixation of the supporting sleeve 17 within the hose end 10 because the elastic material of the hose end 10 is pressed into the apertures 20.
  • the hose coupling 1 can be made of various materials, such as aluminium, steel or plastics.
  • the hose can be made of an elastic material such as rubber or thermoplastic elastomere.
  • the hose 9 is made of a rubber such as for instance ethylene- propylene-diene rubber (EPDM), butyl rubber (IIR) or halogenated butyl rubber (CIIR) having a supporting layer and having an inner layer forming the inner surface 21 of the hose 9 made of a plastic or resin material which is resistant against aggressive fluids such as refrigerant fluids.
  • the adhesive may be a phenolic resin which can be coated by spraying, rolling or varnishing to the respective surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)

Abstract

L'invention concerne un ensemble raccord de tuyau flexible comprenant : un tuyau flexible (9) destiné à transporter un fluide, ledit tuyau (9) étant pourvu d'une extrémité (10) comportant une surface externe (11); un raccord de tuyau flexible (1) comprenant une partie manchon (2) pourvue d'un réceptacle (4) comportant une surface interne (12) destinée à recevoir l'extrémité de tuyau (10), la surface externe (11) de l'extrémité de tuyau flexible (10) étant collée sur la surface interne (19) de la partie manchon (2).
EP14815595.5A 2013-12-03 2014-12-03 Ensemble raccord de tuyau flexible et procédé d'établissement de raccord de tuyau Withdrawn EP3077716A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1321300.4A GB2520940A (en) 2013-12-03 2013-12-03 Hose coupling assembly and method for establishing a hose connection
PCT/EP2014/076329 WO2015082507A1 (fr) 2013-12-03 2014-12-03 Ensemble raccord de tuyau flexible et procédé d'établissement de raccord de tuyau

Publications (1)

Publication Number Publication Date
EP3077716A1 true EP3077716A1 (fr) 2016-10-12

Family

ID=49979702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14815595.5A Withdrawn EP3077716A1 (fr) 2013-12-03 2014-12-03 Ensemble raccord de tuyau flexible et procédé d'établissement de raccord de tuyau

Country Status (3)

Country Link
EP (1) EP3077716A1 (fr)
GB (1) GB2520940A (fr)
WO (1) WO2015082507A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB889092A (en) * 1959-03-26 1962-02-07 Weatherhead Co Hose and hose end assembly and method of making same
DE3512988A1 (de) * 1985-04-11 1986-10-16 Phoenix Ag, 2100 Hamburg Schlauchanschluss
FR2824617B1 (fr) * 2001-05-14 2003-06-27 Comap Raccord instantane a fixation par coincement de tubes a base de materiau thermoplastique
ITMI20061621A1 (it) * 2006-08-11 2008-02-12 Meccanica Finnord S P A Sistema di assemblaggio di un tubo per fluidi ad alta pressione e di un elemento di raccordo e raccordo ottenuto con detto sistema
US20080309073A1 (en) * 2006-09-22 2008-12-18 Aurora Oil And Gas Corporation Composite Tubing Coupling Terminal And Method
DE102007026394B4 (de) * 2007-06-06 2010-11-11 Eaton Fluid Power Gmbh Drehfester Schlauchanschluss
DE102010010765A1 (de) * 2010-03-09 2011-09-15 Eugen Forschner Gmbh Vorrichtung und Verfahren zum Verbinden einer ein Fluid führenden Leitung mit einem benachbarten Bauteil
JP4889065B1 (ja) * 2010-07-13 2012-02-29 株式会社トヨックス 補強ホースの端面構造及びそのホース端面処理方法並びに被覆キャップ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015082507A1 *

Also Published As

Publication number Publication date
GB201321300D0 (en) 2014-01-15
WO2015082507A1 (fr) 2015-06-11
GB2520940A (en) 2015-06-10

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