WO2004046603A1 - Connecteur de conduite ameliore - Google Patents

Connecteur de conduite ameliore Download PDF

Info

Publication number
WO2004046603A1
WO2004046603A1 PCT/AU2003/001545 AU0301545W WO2004046603A1 WO 2004046603 A1 WO2004046603 A1 WO 2004046603A1 AU 0301545 W AU0301545 W AU 0301545W WO 2004046603 A1 WO2004046603 A1 WO 2004046603A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
extension tube
fitting
nut
retaining
Prior art date
Application number
PCT/AU2003/001545
Other languages
English (en)
Inventor
Guy Malcolm Phillipps
Original Assignee
Jtl Australia Pty Ltd
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 Jtl Australia Pty Ltd filed Critical Jtl Australia Pty Ltd
Priority to AU2003283056A priority Critical patent/AU2003283056A1/en
Publication of WO2004046603A1 publication Critical patent/WO2004046603A1/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
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/12—Joints for pipes being spaced apart axially
    • 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
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
    • F16L27/127—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement with means for locking the longitudinal adjustment or movement in the final mounted position
    • F16L27/1274—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement with means for locking the longitudinal adjustment or movement in the final mounted position by means of a swivel nut

Definitions

  • the present invention relates to pipe repair and pipe take-off methods and pipe fittings therefor.
  • the invention relates in particular to methods and pipe fittings suitable for sealably joining spaced-apart axially aligned pipe ends.
  • Low cost irrigation pipes or "rural pipes” are commonly made with nominal diameters of V ⁇ , 3 ⁇ , 1, V ⁇ , VA and 2 inches in polyethylene. Such pipes are typically joined by mechanical compression fittings. Generally, these imperial sized fittings require a barbed insert or liner to act as a stiffener to prevent the pipe wall from collapsing under compression and to provide a tail or spigot having a specific sized outer diameter for insertion into the fitting. In some cases metric sized fittings also require a barbed insert.
  • Rural compression fittings or mechanical couplings whether they be straight joiners, tees, elbows or threaded end connectors typically comprise a central body, an insert (liner), collapsible gripper ring, a nut and a seal ring.
  • the seal ring can either be attached to the insert or housed within the body of the main fitting.
  • some fittings have the insert attached to the main body and a threaded nut that winds back over the pipe collapsing the pipe wall onto the insert to form a watertight seal.
  • the most common fitting to pipe assembly process requires a pipe to be cut to the required length.
  • a nut is then passed over the outside of the pipe followed by a gripper ring prior to pushing an insert into the bore of the pipe.
  • the fitting body is then pushed into the insert and a seal is created between the insert and fitting body by deformation of a seal.
  • the nut is tightened forcing the gripping member to bite into the pipe, thereby collapsing the wall of the pipe onto an insert with raised barbs on the outside surface of the insert forming a watertight seal between the inside wall of the pipe and the outside of the insert.
  • a further problem with existing techniques is that generally the user must allow time for glued joints to cure before the pipe can be pressurised.
  • a still further problem with existing techniques is that a clean and dry environment is required to achieve reliable mechanical and/or sealed joints.
  • existing techniques make repair difficult in a submerged environment or an environment where flow and hence pressure from the pipe to be repaired or modified cannot be isolated.
  • a telescopic pipe fitting for joining two spaced apart axially aligned pipe ends
  • the pipe fitting comprising: a hollow body defining an inner bore and having a proximal and a distal end; an extension tube telescopically mounted within the inner bore, the extension tube having a distal and a proximal end; an intermediate annular seal disposed between the proximal end of the extension tube and the inner bore of the body effecting a seal there-between; a retaining means for retaining the extension tube within the inner bore; a first joining means for mechanically and sealably joining the distal end of the extension tube to a first of the pipe ends, the first joining means mounted to, or integral with the distal end of the extension tube; and a second joining means for mechanically and sealably joining the distal end of the body to a second of the pipe ends, the second joining means mounted to, or integral with the distal end of the body; wherein the extension tube is telescopically movable
  • the retaining means comprises a first abutment surface depending from the body and a second abutment surface depending from the extension tube.
  • the retaining means comprises: a retaining nut threadably mounted to the proximal end of the body, the retaining nut having an internally tapered end; and a retaining wedging ring extending circumferentially around the extension tube, the retaining wedging ring having a tapered surface co-operable with the internally tapered end of the retaining nut, wherein the first abutment surface is defined by a surface of the retaining wedging ring.
  • the second abutment surface is defined by a projection extending around the periphery of the proximal end of the extension tube.
  • the first joining means comprises: a first end nut threadably mounted to the distal end of the extension tube, the first end nut having an internally tapered end; and a first end wedging ring having a tapered external surface co-operable with the internally tapered end of the first end nut and a barbed internal surface for gripping the outside of the first pipe end, the first end wedging ring held captive between the first end nut and the extension tube, wherein, in use, tightening of the first end nut causes wedging of the first end wedging ring between the internally tapered end of the first end nut and the first pipe end so as to lock the extension tube with respect to the first pipe end.
  • the fitting further comprises: a first end annular seal; and a first insert having a first barbed end for insertion into the first pipe end and a first spigot end for sealably cooperating with the first annular seal to provide a seal between the first spigot end and the extension tube.
  • the fitting further comprises: a second end annular seal; and a second insert having a second barbed end for insertion into the second pipe end and a second spigot end for sealably cooperating with the second annular seal to provide a seal between the second spigot end and the body.
  • a method of providing sealed communication across a gap between two spaced apart axially aligned pipe ends without the need to move either of the pipe ends axially comprising the steps of: inserting a first barbed end of a first insert into a first of the two pipe ends, the first insert having a first spigot end for sealably cooperating with a first annular seal; inserting a second barbed end of a second insert into a second of the two pipe ends, the second insert having a second spigot end for sealably cooperating with a second annular seal; inserting a telescopically adjustable pipe fitting between the spigot ends, the fitting having a through-bore between a first fitting end and a second fitting end; sliding the first fitting end over the first spigot end; telescopically extending the fitting until the second fitting end slides over the second spigot end; effecting a seal between the first spigot end, the first annular seal and the first fitting end; and effecting a seal between the first spigot end; the first
  • the steps of effecting a seal occur as the fitting ends slide over the spigot ends.
  • the method further comprises the steps of: locking the extension tube with respect to the first pipe end; and locking the body with respect to the second pipe end.
  • Figure 1 shows an exploded perspective view of a telescopic pipe fitting according to a first embodiment of the invention
  • Figure 2 shows a trench exposing pipe ends ready to be joined by the telescopic pipe fittings shown in Figure 1;
  • Figure 3 shows the telescopic pipe fitting in Figure 1 being used to join the pipe ends shown in Figure 2;
  • Figure 4 is a cross-sectional view of the telescopic pipe fitting shown in Figure 1 in a retracted condition;
  • Figure 5 is a similar view to that of Figure 4 but shows the telescopic fitting in an extended position
  • Figure 6 is a side view of the body of the telescopic pipe fitting shown in Figure 1;
  • Figure 7 is a cross-section view of the body shown in Figure 6;
  • Figure 8 is an end view of the body shown in Figure 6;
  • Figure 11 is an end view of the extension tube shown in Figure 9.
  • Figure 12 is a perspective view of an alternative body to the body shown in Figures 9, 10 and 11.
  • the pipe fitting 10 comprises of a hollow body 20, an extension tube 30 and a retaining means 40 for retaining the extension tube 30 within the body 20.
  • the hollow body 20 defines an inner bore 25 and has a proximal end 22 and distal end 28.
  • the inner bore 25 receives the proximal end 36 of the extension tube 30.
  • a pair of intermediate annular seals in the form of "O" rings 34 are provided to affect a seal between the extension tube 30 and the inner bore 25 of the body 20. While in this embodiment of the invention a pair of annular O-ring seals are used, other sealing arrangements may be used.
  • the extension tube 30 is telescopically movable with respect to the body 20 so as to vary the spacing between the distal end 28 of the body 20 and the distal end 38 of the extension tube 30 so as to allow installation of the fitting 10 between first and second pipe ends 6 and 8, such as those shown in Figures 2 and 3, without the need to move the pipe ends 6 and 8 axially.
  • significant excavation involving breaking up of asphalt and /or concrete is often required to allow the pipe ends to be manipulated so as to achieve the axial movement necessary to position them within fitting ends.
  • Figure 2 shows the pipe ends 6 and 8 exposed within a trench in the ground 5. Installation of the telescopic pipe fitting 10 between the two spaced apart axially aligned pipe ends 6 and 8 is clearly shown in Figure 3.
  • the retaining wedging ring 45 has a plurality of barbs 47 that provide a first pair of annular abutment surfaces which effectively depend from the body by virtue of the nut 42 being threaded onto the body 20.
  • a second pair of annular abutment surfaces are provided by corresponding barbs 37 that extend from the extension tube. Barbs 37 are most clearly illustrated in Figure 9.
  • the inter-engaging barbs 37 and 47 provide a positive lock that ensure the shaft 35 will not telescope completely out of the inner bore 25 under hydraulic pressure or due to excessive retraction of either of pipe ends 6 or 8.
  • a second function of the retaining means 40 is to centrally locate the shaft to prevent bending loads from occurring and possibly deforming the seal between the shaft 35 and the internal bore 25 to allow it to leak.
  • the retaining means 40 is arranged and constructed to hold the extension tube 30 in a position coaxial with the body 20.
  • the co-operable action between the wedging ring 45 and the internally tapered end 44 of the lock in nut 42 ensure that when tightened, the retaining means 40 holds the shaft 35 into the centre of the inner bore 25.
  • the annular intermediate "O" ring seals 34 together with the small clearance between the proximal end 36 and the inner bore 25, ensure that the proximal end 36 remains centred with respect to the inner bore 25. This reduces the possibility of leakage.
  • An end stop 26 clearly shown in Figure 7 is provided at the end of the inner bore 25, limiting the inwards travel of the extension tube 30 with respect to the hollow body 20.
  • An abutment surface 33 is provided towards the distal end 38 of the extension tube 30. This abutment surface 33 assists in releasing the retaining wedging ring 45 to allow free movement of the retaining wedging ring 45 along the outside of the extension tube 30.
  • first and second joining means 50 and 70 are provided at its ends. These joining means 50 and 70 are shown in Figure 3.
  • a first joining means 50 is shown at the distal end 38 of the extension tube 30.
  • This joining means 50 mechanically and sealably joins the distal end 38 to a first pipe end 6 as shown in Figure 3.
  • the first end wedging ring 55 (not shown) can be identical to the corresponding retaining wedging ring 45 used for the retaining means 40 (shown in Figure 1). This allows for interchangeability of parts which has advantages both for the user and in relation to cost to manufacture and inventories.
  • the nut 52 and nut 42 are identical, but in other embodiments of the invention may be constructed differently.
  • the insert 65 performs two functions. Firstly, the wall thickness of a typical plastics imperial pipe is inadequate to allow effective clamping by the wedging ring 55 (not shown). The insert stiffens the pipe end 6. Secondly the insert 65 provides a tail or spigot end 67 with an outer diameter of a standard metric size. The tail 67 or spigot end 67 engages an annular seal 60 as shown in Fig. 5. Various annular seals 60 may be used. In this embodiment, the seal has a "D" shaped cross-section. Thus, the first joining means 50 can be used to connect an imperial pipe end 6 with an insert 65 in its end.
  • fitting 10 can be used to join a plain ended plastics metric pipe (without an insert 65) using a different sized wedging ring 55 (not shown) and metric nut 52.
  • first joining means 50 While a specific first joining means 50 is shown in Figure 1, alternatives could be used.
  • the distal end 38 of the extension tube 30 could comprise a threaded section and /or the distal end 28 of the body 20 could comprise a threaded section.
  • a further alternative would be a barbed tail piece and a nut with an internally threaded conical section arranged to grip into an outer wall of a plastic pipe upon tightening.
  • a second joining means 70 is provided at the distal end 28 of the hollow body 20.
  • the second joining means 70 is the same as the first joining means 50.
  • first joining means 50 alternative joining means can be used.
  • the body 20 includes a take off 90.
  • the fitting 10 is identical to the fitting 10 shown in Figures 1 to 11.
  • the take off 90 is orientated at right angles with respect to the extension tube shaft 35, however various angles may be used to create "T" joints, "Y" joints or other arrangements.
  • isolation valves or other piping elements may be incorporated or connected into the telescopic pipe fitting 10.
  • a method, according to a second aspect of the invention, of providing sealed communication across a gap between two spaced apart axial lined pipe ends without the need to significantly move either of the pipe ends will now be described.
  • this method it is not necessary to move the pipe ends axially or longitudinally.
  • rural pipe will be buried below ground and the first step in repairing a leak in the underground pipe or inserting a take-off or isolation valve using this method is to dig around the area of the leak or the area in which the modification is required to expose the pipe.
  • Figure 2 shows such an excavation. In Figure 2 it can be seen that the pipe ends 6 and 8 have been cut cleanly.
  • first barbed end of a first insert 65 into a first of the two pipe ends 6.
  • the first insert 65 has a first spigot end 67 for sealably co-operating with a first annular seal 60 as is best seen in Figure 5.
  • a second barbed end of a second insert 85 can be inserted into a second of the two pipe ends 8 in a similar way (see Figure 4).
  • a telescopically adjustable pipe fitting 10, such as the fitting shown in Figure 1 can then be inserted between the spigot ends 67 and 87.
  • the first fitting end 28 of the telescopically ajustable pipe fitting can then be slid over the first spigot end 67.
  • the fitting can be telescopically extended until the second fitting end 38 slides over the second spigot end 87.

Abstract

L'invention concerne un raccord (10) de conduite télescopique permettant de raccorder deux extrémités (6, 8) de conduite séparées et alignés axialement. Ce raccord de conduite comprend: un corps creux (20) définissant un alésage intérieur et présentant une extrémité (28); un tube d'extension (30) monté télescopique au sein de l'alésage intérieur; un joint annulaire intermédiaire disposé entre le tube (30) et l'alésage intérieur du corps (20) assurant une étanchéité entre ces derniers; et un moyen de retenue (40) permettant de retenir le tube d'extension (30) au sein de l'alésage intérieur. Un premier et un deuxième moyen de raccordement (50, 70) permettent de raccorder de manière mécanique et étanche le raccord (10), respectivement aux extrémités (6, 8) de conduite. Le tube (30) peut être déplacé de manière télescopique par rapport au corps (20) de façon à varier l'espacement situé entre l'extrémité (28) du corps et l'extrémité (38) du tube pour permettre une installation entre les extrémités (6, 8) de conduite sans avoir à déplacer ces dernières.
PCT/AU2003/001545 2002-11-19 2003-11-19 Connecteur de conduite ameliore WO2004046603A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003283056A AU2003283056A1 (en) 2002-11-19 2003-11-19 Improved pipe connector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2002952729A AU2002952729A0 (en) 2002-11-19 2002-11-19 Improved pipe connector
AU2002952729 2002-11-19

Publications (1)

Publication Number Publication Date
WO2004046603A1 true WO2004046603A1 (fr) 2004-06-03

Family

ID=28796112

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2003/001545 WO2004046603A1 (fr) 2002-11-19 2003-11-19 Connecteur de conduite ameliore

Country Status (2)

Country Link
AU (1) AU2002952729A0 (fr)
WO (1) WO2004046603A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102459982A (zh) * 2009-06-15 2012-05-16 韦文有限公司 具有支撑套管的推入配合式管件系统
JP2013007440A (ja) * 2011-06-24 2013-01-10 Bridgestone Corp 管継手
GB2554890A (en) * 2016-10-12 2018-04-18 Poulton Tech Limited A seal assembly
CN110409592A (zh) * 2019-08-16 2019-11-05 东阳阿语机械科技有限公司 一种连接式可伸缩管道

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461828A (en) * 1946-05-13 1949-02-15 Lawrence E Ostrom Extension joint
US3404905A (en) * 1965-07-15 1968-10-08 Fischer Ag Georg Smooth pipe connection especially for pipes of synthetic material
US4303263A (en) * 1977-03-09 1981-12-01 Societe Legris France S.A. Instant fitting for reinforced multilayer flexible tubings for fluids
DE3106160A1 (de) * 1981-02-19 1982-08-26 Helmut von 5000 Köln Ameln Rohrpassstueck
AU4557385A (en) * 1984-07-30 1986-02-06 Heriot, I.R. Telescopic pipe coupling
US4687232A (en) * 1985-12-27 1987-08-18 Zimmerman Harry M Pipe slip joint system
DE19702289A1 (de) * 1997-01-23 1998-08-06 Oventrop Sohn Kg F W Anordnung zur Verbindung von Rohren oder Schläuchen mit Armaturen oder Fittings

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461828A (en) * 1946-05-13 1949-02-15 Lawrence E Ostrom Extension joint
US3404905A (en) * 1965-07-15 1968-10-08 Fischer Ag Georg Smooth pipe connection especially for pipes of synthetic material
US4303263A (en) * 1977-03-09 1981-12-01 Societe Legris France S.A. Instant fitting for reinforced multilayer flexible tubings for fluids
DE3106160A1 (de) * 1981-02-19 1982-08-26 Helmut von 5000 Köln Ameln Rohrpassstueck
AU4557385A (en) * 1984-07-30 1986-02-06 Heriot, I.R. Telescopic pipe coupling
US4687232A (en) * 1985-12-27 1987-08-18 Zimmerman Harry M Pipe slip joint system
DE19702289A1 (de) * 1997-01-23 1998-08-06 Oventrop Sohn Kg F W Anordnung zur Verbindung von Rohren oder Schläuchen mit Armaturen oder Fittings

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102459982A (zh) * 2009-06-15 2012-05-16 韦文有限公司 具有支撑套管的推入配合式管件系统
JP2013007440A (ja) * 2011-06-24 2013-01-10 Bridgestone Corp 管継手
GB2554890A (en) * 2016-10-12 2018-04-18 Poulton Tech Limited A seal assembly
GB2554890B (en) * 2016-10-12 2019-01-02 Poulton Tech Limited A seal assembly
US11193610B2 (en) 2016-10-12 2021-12-07 Poulton Technologies Limited Seal assembly
CN110409592A (zh) * 2019-08-16 2019-11-05 东阳阿语机械科技有限公司 一种连接式可伸缩管道
CN110409592B (zh) * 2019-08-16 2020-11-03 浙江正同管业有限公司 一种连接式可伸缩管道
JP2021032405A (ja) * 2019-08-16 2021-03-01 方小剛 伸縮可能な接続型パイプ

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