WO1989009904A1 - Raccordement de tubes - Google Patents

Raccordement de tubes Download PDF

Info

Publication number
WO1989009904A1
WO1989009904A1 PCT/SE1989/000182 SE8900182W WO8909904A1 WO 1989009904 A1 WO1989009904 A1 WO 1989009904A1 SE 8900182 W SE8900182 W SE 8900182W WO 8909904 A1 WO8909904 A1 WO 8909904A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
deformation
jointing
wall
male part
Prior art date
Application number
PCT/SE1989/000182
Other languages
English (en)
Inventor
Per Ivar Lund
Tomas Arvidsson
Original Assignee
Nords Verkstads Aktiebolag
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 Nords Verkstads Aktiebolag filed Critical Nords Verkstads Aktiebolag
Publication of WO1989009904A1 publication Critical patent/WO1989009904A1/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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/083—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping
    • 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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
    • F16L19/065—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring

Definitions

  • the present invention relates to a pipe coupling, which is used to connect a pipe having a circular cross-sec ⁇ tion, which pipe coupling comprises a thread jointing having a male part, a female part and a jointing ring disposed therebetween, which parts are coaxially disposed and penetrated by the coaxially disposed pipe, which is to be connected.
  • the invention relates to a pipe coupling, in which said jointing ring compri ⁇ ses a front portion having a front conical rotation-sym metrical surface, which front portion abuts an internal surface of said male part, which is also conical, a rear rigid portion in contact with said female part as well as a deformation-portion, which is placed between said front and said rear protions and designed to be deformed when subjected to forces in the axial direction.
  • SE-C-87 749, SE-C-144 051 and SE-C-351 023 relate to couplings, which are designed with an externally threaded male part having an internal rotation-symmetrical taper as well as an internally threaded female part, said two parts being bored through with a cylindrical hole having the same diameter as the tube, which is to be connected.
  • a jointing ring is disposed therebetween and has an in ⁇ ternal diameter, which corresponds to the external pipe diameter, and an external rotation-symmetrical taper, which is directed against said male part and fits into the taper of said male part with a possible conical an ⁇ gular deviation. Furthermore, the rear portion of said jointing ring abuts the female part of said coupling.
  • the front edge of the ring can be designed with one or several lips, and a hardening of the ring is also known, in order to give said lips a cutting action on the pipe, which is made of a softer material, and con ⁇ sequently a reliable fastening.
  • a hardening of the ring is also known, in order to give said lips a cutting action on the pipe, which is made of a softer material, and con ⁇ sequently a reliable fastening.
  • the join- ting will be unresilient in this way and for that reason sensitive to vibrations, while the hardening reduces the corrosion resistance.
  • Pipe couplings with a jointing ring, which between its two ends has a deformation-portion are also known, e.g. through FR-A-1 081 892 and US-A-2 100 796.
  • the jointing ring according to said French patent has in each end wedge-shaped conical portions, which cooperate with cor ⁇ responding internal conical jointing surfaces on the male and the female parts, as well as a central deformation- portion, while said US patent has a jointing ring, which is corrugated, i.e. has a wave design in the axial cross- sections .
  • the ends are inclined but not markedly wedge- shaped.
  • the object of the present invention is to suggest an im ⁇ proved pipe coupling of the type set forth n the preamble of the mam claim. More particularly, one object is to suggest a pipe coupling with essentially the same advan- tages as that above-described pipe coupling, which comp ⁇ rises two jointing rings positioned adjacent each other, which provides a more vibration-resistant coupling, which can be made of the same material as the pipe and has an improved resistance to axial stresses on the jointing but which does not have those drawbacks, which a two part coupling ring results m.
  • the deformation-portion as a comparatively thin, inclined wall, wn ch connects the external periphery of the front portion to the internal periphery of the rear portion.
  • said wall s forced to rise and be posi ⁇ tioned in a more vertical position, and in th s a * ' ts internal periphery will move in a radial direction in ⁇ wards and penetrate into the pipe and in this way effect the above-mentioned second waist formation in the pipe wall. Thanks to this penetration, which results in said second waist formation, a sufficient fastening is attained of the jointing ring in the pipe wall to resist the stress in the axial direction.
  • the internal conical portion of the male part will ex ⁇ tend essentially up to the rear abut point of the front portion against the pipe wall or longer, before the coupling has been tightened.
  • the front portion of the ring preferably is provi ⁇ ded with a somewhat smaller taper than the conical inter ⁇ nal surface of the male part in order to attain an im ⁇ proved penetration capacity, it is important that the deformation-portion has a sufficient rigidity to prevent its collapse, before said front portion has penetrated into the pipe a sufficient distance in order to give the conical surface a fully leakproof contact.
  • This rigidity can be attained by a combination of an appropriate wall thickness and appropriate geometrical dispositions. The latter feature implies i.a. that the wall suitably is in ⁇ clined forwards and outv/ards but that it for the rest is straight, i.e. not is folded.
  • Fig. 1 is a lateral view and a partial section of the composite pipe coupling according to a first preferred embodiment before a tightening
  • Fig. 2 shows the same coupling, roughly half tightened
  • Fig. 3 shows the coupling fully tightened
  • Fig. 4 shows a jointing ring according to the first pre ⁇ ferred embodiment on a larger scale
  • Fig. 5 shows a jointing ring according to a second possible embodiment of the invention.
  • Figs. 5A, 5B and 5C show a few encircled details in Fig. 5 on a larger scale.
  • the pipe coupling shown in Figs. 1-3 comprises a male part
  • first cut 4 having an internal taper 4a, v/hich is de ⁇ signed to widen towards the open end of male part 1 up to a front edge 4b.
  • second cut 5 is provided, which is cylinder-shaped and is terminated with an annular edge or stop face 6.
  • a nut-shaped female part 7 having an internal thread 8 is in Fig. 1 screwed in on the external cylinder-shaped sec ⁇ tion 2 of male part 1.
  • Female part 7 is provided v/ith a cylinder-shaped opening 9 at its end turned away from male part 1, which opening has a diameter which corresponds with the external diameter of a pipe 10, which has been inserted into said pipe coupling.
  • Pipe 10 is inserted to such an extent that it abuts internal annular edge 6 in male part 1.
  • a jointing ring 11 is mounted on pipe 10 between male part 1 and female part 7 in a space 13, which inwards is limited by the pipe wall, forwards is limited by front edge 4b of male part 1 and by tapered surface 4b of cut 4 of the male part, outwards is limited by a first internal cylindric surface 13a in female part 7 and by a second cylindric surface 13b having a slightly- smaller diameter than first cylindric surface 13a, and backwards is limited by a tapered press surface 13a on fe ⁇ male part 7, which is inclined from second rear cylindric surface 13b towards cylinder-shaped opening 9 with an angle of 30° in relation to a radial plane.
  • jointing ring 11 which is turned towards male part 1 is, in the present description and the patent claims, called the front end, while the opposite end is called the rear end.
  • Said jointing ring is shown in detail in Fig. 4. It is provided in its front end with a front wedge-shaped conical portion 12 having an external conical surface 12a, which has an angle of about 15 in relation to a radial plane, which is slightly smaller than the corresponding angle of internal taper 4a of male part 1.
  • An opening 14 extends through jointing ring 11 and has a diameter, which corresponds with the external diameter of pipe 10.
  • a deformation-portion 15 is provided, which is designed as a comparatively thin wall 21.
  • the word comparatively implies that the wall is substantially thinner than the material in said front and rear portions.
  • Said wall connects the outer periphe- ry of front portion 12 with the inner periphery of rear rigid portion 20, i.e. wall 21 extends between partly transition 18 between front portion 18 and deformation- portion 15 and partly front abut point 17 of rear portion 20 against the pipe wall, i.e. the point which forms a transition between rear portion 20 and deformation-por- tion 15.
  • wall 21 On the one side wall 21 is surrounded by an in ⁇ ner annular groove 16 having a triangular cross-section and on the other side by an outer V-shaped annular groove 19.
  • Wall 21 can also be defined in this way: It extends from front abut point 17 of rear portion 20 forwards and upwards to transition 18 between front portion 12 and de ⁇ formation-portion 15. The angle of inclination of wall 21 is 30-60°, before deformation-portion 15 has been deformed in conjunction with the tightening.
  • jointing ring 11 is, with its front conical portion 12, inserted into male part 1 to such an extent, that front edge 4b of the male part is positioned substantially at the same level - in the axial direction - as rear abut point 12b of front portion 12 against the pipe wall.
  • front ring portion 12 will in this way be held up against conical surface 4a of male part 1.
  • Fig. 2 shows hov/ the coupling has been half tightened and in this way forced front portion 12 of jointing ring 11 to, while being held up against conical surface 4a of male part 1, penetrate into the interface between pipe 10 and male part 1 and bring about an efficient tightening between the same. Consequently, during this tightening step a relative movement between jointing ring 11 and male part 1 takes place and thus, at the end of this step front edge 4b of male part 1 is positioned substantially at the same level as said transition 18 between front portion 12 of the ring and wall 21, Fig. 2.
  • the penetration of front portion 12 of ring 11 into the pipe wall results in a first front waist formation 22 in the pipe wall, Fig. 2.
  • conical front portion 12 of ring 11 will fully contact- conical internal surface 4 of male part 1, which in this way supports deformation-zone 15 in a radial direction.
  • wall 21 When the deformation is attained in this way, the direction of wall 21 will turn increasingly vertical, while the abut point of wall 21, which corresponds to front abut point 17 of rear portion 20, will penetrate into the pipe wall and bring about a second rear waist formation 23, Fig. 3.
  • wall 21 is prevented from instead moving in a radial direction outwards by the support of front portion 12 of the join ⁇ ting ring on its external side against radially outward- ly directed movements of the male part up to the periphe- rical portion of wall 21, i.e. transition 18.
  • This second waist formation 23 has brought about such a reliable fas ⁇ tening of jointing ring 11 in the pipe wall, that all normal axial stresses on the jointing will be resisted and a very satisfactory vibration-resistant tightening at the same time be accomplished.
  • Fig. 5 shows a modified embodiment of a jointing ring.
  • the same reference numerals as in Figs. 1-4 for the corresponding elements have been used, suffix ' being used.
  • the difference between this embodiment and the embodi ⁇ ment described above resides in that front conical por ⁇ tion 12' as well as rear rigid portion 20' have been pro ⁇ vided with internal cuts 12c' and 20c' respectively. Cut 12c' renders front conical portion 12' slightly more flex ⁇ ible in order to facilitate its deformation and penetra ⁇ tion into the pipe wall during the first step of the pipe coupling tightening process.
  • Rear cut 20c' renders the front common abut point 17' of wall 21' and rear por- tion 20' against pipe 10 more marked.
  • rear portion 20' will be slightly less rigid than a corre ⁇ sponding fully homogenous portion, but more rigid than deformation-portion 15 '/wall 21' .
  • the same has been made more inclined in relation to the ra ⁇ dial plane than in the previous embodiment.
  • the angle betv/een the external surface of portion 20 ' and the radial plane is in this case 60 , shile a 45 inclination of the corresponding angle of the. previous embodiment is used.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Joints With Sleeves (AREA)
  • Joints Allowing Movement (AREA)
  • Joints With Pressure Members (AREA)

Abstract

L'invention concerne un raccordement de tubes se présentant sous la forme d'un raccordement fileté doté d'une partie mâle (1), d'une partie femelle (7) entre lesquelles est disposée une bague (11) de raccordement, et lesquelles sont disposées coaxialement et pénétrées par le tube (10) coaxial à raccorder. Ladite bague de raccordement comprend une partie frontale (12) comportant une surface (12a) symétrique de rotation conique frontale, aboutant une surface interne (4a) également conique dans ladite partie mâle, une partie rigide arrière (20) en contact avec ladite partie femelle, ainsi qu'une partie à déformation (15) positionnée entre lesdites parties frontale et arrière et conçue pour être déformée lorsqu'elle est soumise à des forces dans le sens axial. Ladite partie à déformation (15) se présente comparativement comme une mince paroi (21), reliant la périphérie externe de ladite partie frontale (à 18) à la périphérie interne de ladite partie arrière (à 17).
PCT/SE1989/000182 1988-04-12 1989-04-06 Raccordement de tubes WO1989009904A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8801342A SE461998B (sv) 1988-04-12 1988-04-12 Roerkoppling
SE8801342-0 1988-04-12

Publications (1)

Publication Number Publication Date
WO1989009904A1 true WO1989009904A1 (fr) 1989-10-19

Family

ID=20371981

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1989/000182 WO1989009904A1 (fr) 1988-04-12 1989-04-06 Raccordement de tubes

Country Status (3)

Country Link
AU (1) AU3420189A (fr)
SE (1) SE461998B (fr)
WO (1) WO1989009904A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5882050A (en) * 1997-04-15 1999-03-16 Williams; Peter C. Ferrule with relief to reduce galling
US6629708B2 (en) 1997-04-15 2003-10-07 Swagelok Company Ferrule with relief to reduce galling
EP2128509A1 (fr) * 2007-03-19 2009-12-02 Daikin Industries, Ltd. Raccord de tuyauterie non évasé, dispositif de réfrigération et dispositif chauffe-eau
WO2011086181A1 (fr) * 2010-01-18 2011-07-21 Neolix Sas Instruments d'odontologie comprenant un assemblage indémontable de deux composants, l'un mâle et l'autre femelle, et technique d'assemblages de deux composants mâle/femelle correspondante
US8480135B2 (en) 1997-04-15 2013-07-09 Swagelok Company Ferrule with internal recess and cylindrical wall
EP2918887A4 (fr) * 2012-11-08 2016-06-29 Bmt Co Ltd Virole arrière ayant une partie élastique en forme de soufflet
US10024468B2 (en) 2014-05-09 2018-07-17 Swagelok Company Conduit fitting with components adapted for facilitating assembly
US10215315B2 (en) 2008-09-05 2019-02-26 Parker-Hannifin Corporation Tube compression fitting and flared fitting used with connection body and method of making same
US10584814B2 (en) 2016-03-23 2020-03-10 Swagelok Company Conduit fitting with stroke resisting features

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE86771C1 (fr) * 1900-01-01
US2100796A (en) * 1936-04-02 1937-11-30 Thomas & Betts Corp Pipe coupler
US2450170A (en) * 1946-11-15 1948-09-28 Robert L Kahn Fitting
US2536745A (en) * 1946-06-14 1951-01-02 Weatherhead Co Tube coupling
FR1081892A (fr) * 1953-05-11 1954-12-23 Bague d'étanchéité et de serrage pour raccords d'accouplement de tuyauteries, conducteurs, etc.
EP0034493A2 (fr) * 1980-02-19 1981-08-26 Imperial Clevite Inc. Raccord de tuyau avec manchon fragile
US4556242A (en) * 1983-11-25 1985-12-03 Imperial Clevite Inc. Vibration resistant high pressure tube fitting
US4586731A (en) * 1983-09-20 1986-05-06 Ermeto Armaturen Gmbh Tube fitting with ferrule

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE86771C1 (fr) * 1900-01-01
US2100796A (en) * 1936-04-02 1937-11-30 Thomas & Betts Corp Pipe coupler
US2536745A (en) * 1946-06-14 1951-01-02 Weatherhead Co Tube coupling
US2450170A (en) * 1946-11-15 1948-09-28 Robert L Kahn Fitting
FR1081892A (fr) * 1953-05-11 1954-12-23 Bague d'étanchéité et de serrage pour raccords d'accouplement de tuyauteries, conducteurs, etc.
EP0034493A2 (fr) * 1980-02-19 1981-08-26 Imperial Clevite Inc. Raccord de tuyau avec manchon fragile
US4586731A (en) * 1983-09-20 1986-05-06 Ermeto Armaturen Gmbh Tube fitting with ferrule
US4556242A (en) * 1983-11-25 1985-12-03 Imperial Clevite Inc. Vibration resistant high pressure tube fitting

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8480135B2 (en) 1997-04-15 2013-07-09 Swagelok Company Ferrule with internal recess and cylindrical wall
US10100955B2 (en) 1997-04-15 2018-10-16 Swagelok Company Advanced geomerty ferrule
US5882050A (en) * 1997-04-15 1999-03-16 Williams; Peter C. Ferrule with relief to reduce galling
US7699358B2 (en) * 1997-04-15 2010-04-20 Swagelok Company Ferrule with relief to reduce galling
US6131963A (en) * 1997-04-15 2000-10-17 Swagelok Company Ferrule with relief to reduce galling
US8777276B2 (en) 1997-04-15 2014-07-15 Swagelok Company Ferrule with internal recess and cylindrical wall
US6629708B2 (en) 1997-04-15 2003-10-07 Swagelok Company Ferrule with relief to reduce galling
USD884130S1 (en) 1997-04-15 2020-05-12 Swagelok Company Back ferrule
US9383048B2 (en) 1997-04-15 2016-07-05 Swagelok Company Ferrule with internal recess and cylindrical wall
EP2128509A1 (fr) * 2007-03-19 2009-12-02 Daikin Industries, Ltd. Raccord de tuyauterie non évasé, dispositif de réfrigération et dispositif chauffe-eau
EP2128509A4 (fr) * 2007-03-19 2013-02-20 Daikin Ind Ltd Raccord de tuyauterie non évasé, dispositif de réfrigération et dispositif chauffe-eau
US10215315B2 (en) 2008-09-05 2019-02-26 Parker-Hannifin Corporation Tube compression fitting and flared fitting used with connection body and method of making same
WO2011086181A1 (fr) * 2010-01-18 2011-07-21 Neolix Sas Instruments d'odontologie comprenant un assemblage indémontable de deux composants, l'un mâle et l'autre femelle, et technique d'assemblages de deux composants mâle/femelle correspondante
FR2955244A1 (fr) * 2010-01-18 2011-07-22 Neolix Instrument d'odontologie comprenant un assemblage indemontable de deux composants, l'un male et l'autre femelle, et technique d'assemblages de deux composants male/femelle correspondante
EP2918887A4 (fr) * 2012-11-08 2016-06-29 Bmt Co Ltd Virole arrière ayant une partie élastique en forme de soufflet
US10024468B2 (en) 2014-05-09 2018-07-17 Swagelok Company Conduit fitting with components adapted for facilitating assembly
US11079046B2 (en) 2014-05-09 2021-08-03 Swagelok Company Conduit fitting with components adapted for facilitating assembly
US10584814B2 (en) 2016-03-23 2020-03-10 Swagelok Company Conduit fitting with stroke resisting features
US11009158B2 (en) 2016-03-23 2021-05-18 Swagelok Company Conduit fitting with stroke resisting features

Also Published As

Publication number Publication date
SE8801342D0 (sv) 1988-04-12
SE8801342L (sv) 1989-10-13
SE461998B (sv) 1990-04-23
AU3420189A (en) 1989-11-03

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