WO1994023235A1 - Perfectionnements d'un ensemble tuyau - Google Patents

Perfectionnements d'un ensemble tuyau Download PDF

Info

Publication number
WO1994023235A1
WO1994023235A1 PCT/GB1994/000681 GB9400681W WO9423235A1 WO 1994023235 A1 WO1994023235 A1 WO 1994023235A1 GB 9400681 W GB9400681 W GB 9400681W WO 9423235 A1 WO9423235 A1 WO 9423235A1
Authority
WO
WIPO (PCT)
Prior art keywords
hose
adaptor
insert
accordance
end fitting
Prior art date
Application number
PCT/GB1994/000681
Other languages
English (en)
Inventor
Stephen Edward Allen
Original Assignee
Btr Plc
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 Btr Plc filed Critical Btr Plc
Priority to AU63815/94A priority Critical patent/AU6381594A/en
Publication of WO1994023235A1 publication Critical patent/WO1994023235A1/fr

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

Definitions

  • This invention relates to a hose assembly comprising a reinforced hose and an end fitting of the kind comprising an insert and a ferrule between which an end of the hose is secured. It relates also to a series of said hose assemblies and end fittings of different bore sizes, to a method of forming a hose assembly of said kind, an end fitting for said assembly and a component part for said end fitting.
  • hoses typically incorporate a layer of wire reinforcement sandwiched between a rubber liner and a cover.
  • the hoses typically are terminated with end fittings which achieve an anchorage by disturbing the lie of wire reinforcement, and so compressing the rubber liner underneath the disturbed part of the wire reinforcement. This provides a termination which is satisfactory for many purposes but the flexibility and deformability of the rubber liner restricts the maximum axial load that can be carried fay the end fitting.
  • a greater anchorage effect is achieved by cutting back the rubber liner, in addition to any cover which may surround the wire reinforcement, and using an insert having a greater outer diameter.
  • the conventional teeth on the larger type insert provide an enhanced interlock by direct wire entrapment. There is direct contact with the wire reinforcement by teeth on the insert and ferrule in contrast to the intervening presence of the rubber liner when anchorage is achieved without cutting back the rubber liner.
  • An object of the present invention is to provide a hose assembly, an end fitting, a series of hose assemblies and of end fittings and a component part of said end fitting whereby a good anchorage may be achieved together with a reduction of costs.
  • a hose end fitting comprises an insert, a ferrule to surround said insert and adapted to be axially located relative to the insert and an adaptor locatable on the insert in use to lie between and occupy a part of the radial space between the insert and ferrule.
  • the adaptor preferably is in the form of a ring and preferably has a radial thickness substantially equal to the radial thickness of the liner layer of a hose to which the end fitting is intended to be attached.
  • the outer diameter of the adaptor is to be less than the inner diameter of the main part of the length of the ferrule. Preferably it is less by at least twice the thickness of the hose wire reinforcement.
  • the present invention further provides for use in a hose end fitting an adaptor cccprising a ring of material, a first part of the ring being adapted to seat around a hose insert and be substantially n ⁇ n-deformable and a second part normally to lie radially spaced from a hose insert and to bs radially deformable in a direction towards the insert.
  • said first part of the ring is comprised by two axially spaced substantially non-deformable portions interconnected fay said radially defo ⁇ nable second part.
  • One of the two portions may present a substantially planar end face which lies in a plane substantially perpendicular to the major axis of the adaptor ring.
  • Another of the two portions may present an end face of a substantially frusto-conical shape.
  • the two axially spaced portions and the interconnecting second part may be shaped to define an inwardly facing groove.
  • the interconnecting second part preferably has a radial thickness in the range 15% to 75%, more preferably in the range 20% to 50%, of the radial thickness(es) of the first part.
  • the interconnecting second part may have a thickness less than 40% of the radial thickness(es) of the first part. That percentage thickness may be no more than 25%.
  • the invention provides an end fitting and a hose assembly, a series of end fittings and a series of hose assemblies which incrarporate(s) an adaptor as hereindescrJbed and wherein the number of different sizes of each of the ferrules, inserts and adaptors in the series corresponds with the number of different sizes of hose with which they may be assembled.
  • a deformable part of an adaptor ring may be arranged, in use, to lie in an end fitting substantially axially aligned with a radially inwardly extending formation, such as a saw-tooth like circumferentially extending rib, provided within a ferrule to engage the exposed reinforcement at the end of a hose.
  • a radially inwardly extending formation such as a saw-tooth like circumferentially extending rib
  • the insert may have a shoulder against which the adaptor may abut for relative axial location.
  • the shoulder may be defined fay a rib which separates a part of the insert which in use actually extends within a hose from an end part that lies outwards of the end of the hose. That rib may define a side of a location groove axially alignable with an inwardly extending ferrule flange in known manner as illustrated for example in British Patent Specification No. 2091832A. Upon swaging of the ferrule to co ⁇ press the end of the hose about the insert the ferrule flange will enter the location groove so as to inhibit subsequent axial, separation of the insert and ferrule.
  • the insert may have hose locating formations such as saw tooth section ribs over the whole of its length for location in the end of a hose.
  • the adaptor may be dimensioned axially so that when one axial end abuts an abutment on the insert the other end is substantially aligned with one of the locating formations on the insert. Subsequent swaging of the ferrule to c ⁇ npress the hose against the adaptor and insert may be arranged slightly to compress radially inwards the substantially non-deformable part of the adaptor. It will then be mechanically interlocked with said one of the hose locating formations.
  • the adaptor may be interlocked by direct compression prior to assembly of the insert with a hose or ferrule.
  • other means such screw threads on the adaptor and insert or other techniques such as non-mechanical interconnection for example by brazing or adhesives may be employed to achieve relative axial location.
  • the invention further provides a hose assembly comprising a reinforced hose having secured thereto an end fitting in accordance with the present invention.
  • Said assembly may incorporate an adaptor of a kind as hereindescribed and which is in a deformed condition.
  • the hose of the assembly may have a liner and/or a cover layer at least one of which does not extend fully into the end fitting.
  • the hose may have a cover which extends substantially fully into the end fitting.
  • the hose may have a reinforceme ⁇ t of wire braid; the wire braid nay have a cover which may extend substantially fully into the end fitting and which may be thinner than a liner layer of the hose.
  • Figure 1 is a longitudinal section of an end of a hose assembly of the invention at an intermediate stage of manufacture
  • Figure 2 is a longitudinal section of the adaptor of the Figure 1 assembly;
  • Figure 3 is a detail view of the adaptor of Figure 2 in situ on part of the insert of Figure 1, and
  • Figure 4 is a longitudinal section of the assembly shown in Figure 1 after swaging of the ferrule.
  • the hose assembly 1 as illustrated in Figure 1 comprises an insert 2, a ferrule 3, an adaptor 4 and a wire reinforced hose 5 only an end part of which is shown.
  • the insert has a tail portion 2a and stem portion 2f for insertion into an end portion 5a of the hose and first and second axially spaced radially outwardly directed annular abutments 2b and 2c respectively on that portion 2d which in use lies beyond the end of the hose.
  • the abutment 2c is defined by a face of a circuinferentially extending rib 6.
  • the abutment 2b is defined by a face of a groove 2e which lies between the insert outer region and the rib 6.
  • the abutment 2b has a larger outer diameter than the abutment 2c.
  • the ferrule 3 for securing to the insert has an inwardly directed annular projection 3a which, prior to swaging, has an inner diameter intermediate the outer diameters of the abutments 2b and 2c.
  • the external surface of the insert stem portion 2f and the inner surface of the ferrule each have annular ribs 8 of a saw-tooth shape in cross-section.
  • the hose 5 has a wire reinforcement layer 9, an outer cover 10 and an inner liner 11.
  • the inner diameter of the ferrule ribs prior to swaging corresponds with the outer diameter of the wire reinforcement 9 which is exposed fay cutting back the cover 10 for a length substantially equal to the distance which the hose extends into the ferrule.
  • the outer diameter of the insert ribs corresponds to the inner diameter of the liner 11.
  • the adaptor 4 is dimensioned to fit around the insert stem portion 2f to lie adjacent the abutment 2c and axially space the hose liner 11 from that abutment face. It has a radial thickness equal to the thickness of the liner.
  • the liner is cut back a distance corresponding to the axial length of the adaptor so that the wire reinforcement layer 9 extends over the adaptor, between the radially outer face of the adaptor and the surrounding ferrule.
  • the adaptor 4 comprises two axially spaced and substantially non-deformable portions 12 interconnected at their radially outer regions by a relatively deformable web part 13 such that the adaptor defines a radially inward facing groove 14.
  • the web part has a radial thickness which is approximately 25% of that of the non-deformable portions (12).
  • One adaptor end 15 is flat to abut directly against the insert abutment face 2c.
  • the other end face 16 is of a frusto-conical shape angled so as to face radially outwards.
  • the angled feature has a purpose described later.
  • ferrule ribs 8 are positioned axially relative to the ferrule, and thus in the assembly relative to the face 2c, so that a first rib 8c lies axially aligned with the deformable web 13 of the adaptor.
  • the adaptor is fitted to the insert to abut the abutment 2c and then crimped lightly so that it is retained on the insert, preferably fconing a mechanical interlock with a nipple rib 8c as shown in Figure 3.
  • the ferrule and the cut back hose end are then fitted around the insert to form an intermediate assembly as shown in Figure 1.
  • the ferrule is then radially compressed for example by pallet swaging so that the ferrule projection 8c enters the insert groove 2e to give axial location of the ferrule relative to the insert.
  • the ferrule ribs 8 ⁇ ct on the exposed wire reinforcement layer to disturb the lie of the wire where it surrounds the hose liner and to form a mechanical type interlock by direct wire entrapment where the wire extends over the adaptor.
  • the wire entrapment arises because the first ferrule rib 8c inwardly deforms the web part 13 of the adaptor and causes the interposed wire to lie against that deformed web.
  • the inclined end face 16 of the adaptor 4 in conjunction with a substantially square cut end of the hose liner provides a small annular space which assists accommodation of excess liner material which may be present in consequence of irregularities arising when cutting back the liner.
  • the resulting deformation of the adaptor as above described leads to good axial retention of the wire reinforcement. This is achieved without the need to use specialised inserts. If a high strength of axial retention is not required the adaptor can simply be emitted, the hose liner not being cut back. In that case the wire reinforcement will be caused to adopt the so called “disturbed lay" over the whole of its length within the ferrule.

Landscapes

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

Abstract

Ensemble tuyau comportant un raccord d'extrémité muni d'un insert (2) et d'un manchon (3) comprimant entre eux l'extrémité d'un tuyau (5) pourvu d'un revêtement intérieur (11) et d'un renfort l'entourant. L'insert (2), dimensionné pour s'adapter au diamètre du revêtement intérieur, comporte un anneau d'adaptation (4) dont le diamètre extérieur correspond au diamètre du renfort. L'extrémité du revêtement intérieur (11) est éliminée pour que dans l'ensemble l'extrémité du renfort (9) puisse se prolonger au-dessus de l'anneau d'adaptation (4) pour y être comprimée par le manchon (3). L'anneau d'adaptation (4) peut être déformable et servir de liaison de blocage mécanique avec le renfort (11).
PCT/GB1994/000681 1993-04-07 1994-03-31 Perfectionnements d'un ensemble tuyau WO1994023235A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU63815/94A AU6381594A (en) 1993-04-07 1994-03-31 Improvements in and relating to a hose assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9307271.8 1993-04-07
GB939307271A GB9307271D0 (en) 1993-04-07 1993-04-07 Improvements in and relating to a hose assembly

Publications (1)

Publication Number Publication Date
WO1994023235A1 true WO1994023235A1 (fr) 1994-10-13

Family

ID=10733502

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/000681 WO1994023235A1 (fr) 1993-04-07 1994-03-31 Perfectionnements d'un ensemble tuyau

Country Status (3)

Country Link
AU (1) AU6381594A (fr)
GB (1) GB9307271D0 (fr)
WO (1) WO1994023235A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2824617A1 (fr) * 2001-05-14 2002-11-15 Comap Raccord instantane a fixation par coincement de tubes a base de materiau thermoplastique
WO2003012329A1 (fr) * 2001-07-25 2003-02-13 Itr S.P.A. Element rapporte pour raccord hydraulique et raccord hydraulique comprenant un tel element rapporte
WO2008141386A1 (fr) * 2007-05-23 2008-11-27 E.R.T.H. Hyd Pty Ltd Accouplement de tuyau hydraulique
EP2503206A1 (fr) * 2011-03-23 2012-09-26 Voswinkel Entwicklungs- und Verwaltungs-GmbH & Co. KG Raccord de tuyaux
US11378207B2 (en) 2019-11-22 2022-07-05 Trinity Bay Equipment Holdings, LLC Swaged pipe fitting systems and methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1164769B (de) * 1954-10-04 1964-03-05 Resistoflex Corp Verfahren zum Befestigen von Schlauch-kupplungen an Schlaeuchen
GB984749A (en) * 1962-12-07 1965-03-03 Singlehurst Engineering Ltd Improvements in couplings for hoses
GB1065480A (en) * 1965-02-26 1967-04-19 Superflexit Improvements in hose end fittings
WO1991008414A1 (fr) * 1989-11-23 1991-06-13 Vulcan Australia Limited Raccord pour conduite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1164769B (de) * 1954-10-04 1964-03-05 Resistoflex Corp Verfahren zum Befestigen von Schlauch-kupplungen an Schlaeuchen
GB984749A (en) * 1962-12-07 1965-03-03 Singlehurst Engineering Ltd Improvements in couplings for hoses
GB1065480A (en) * 1965-02-26 1967-04-19 Superflexit Improvements in hose end fittings
WO1991008414A1 (fr) * 1989-11-23 1991-06-13 Vulcan Australia Limited Raccord pour conduite

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2824617A1 (fr) * 2001-05-14 2002-11-15 Comap Raccord instantane a fixation par coincement de tubes a base de materiau thermoplastique
WO2003012329A1 (fr) * 2001-07-25 2003-02-13 Itr S.P.A. Element rapporte pour raccord hydraulique et raccord hydraulique comprenant un tel element rapporte
WO2008141386A1 (fr) * 2007-05-23 2008-11-27 E.R.T.H. Hyd Pty Ltd Accouplement de tuyau hydraulique
EP2503206A1 (fr) * 2011-03-23 2012-09-26 Voswinkel Entwicklungs- und Verwaltungs-GmbH & Co. KG Raccord de tuyaux
US11378207B2 (en) 2019-11-22 2022-07-05 Trinity Bay Equipment Holdings, LLC Swaged pipe fitting systems and methods

Also Published As

Publication number Publication date
AU6381594A (en) 1994-10-24
GB9307271D0 (en) 1993-06-02

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