WO2005059423A1 - Systeme de raccord de tuyau a collier interieur - Google Patents

Systeme de raccord de tuyau a collier interieur Download PDF

Info

Publication number
WO2005059423A1
WO2005059423A1 PCT/AU2003/001689 AU0301689W WO2005059423A1 WO 2005059423 A1 WO2005059423 A1 WO 2005059423A1 AU 0301689 W AU0301689 W AU 0301689W WO 2005059423 A1 WO2005059423 A1 WO 2005059423A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
collar
internal
assembly according
section
Prior art date
Application number
PCT/AU2003/001689
Other languages
English (en)
Inventor
Meera Mohan
John Disilvestri
Original Assignee
James Hardie International Finance B.V.
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 James Hardie International Finance B.V. filed Critical James Hardie International Finance B.V.
Priority to PCT/AU2003/001689 priority Critical patent/WO2005059423A1/fr
Priority to AU2003287774A priority patent/AU2003287774B8/en
Priority to NZ548052A priority patent/NZ548052A/en
Publication of WO2005059423A1 publication Critical patent/WO2005059423A1/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
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/022—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings used with sleeves or nipples for pipes of the same diameter, or with reduction pieces
    • 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
    • F16L21/00—Joints with sleeve or socket
    • F16L21/002—Sleeves or nipples for pipes of the same diameter; Reduction pieces

Definitions

  • the present invention relates generally to pipes and more particularly to a pipe assembly, pipe elements that make up the assembly, and an associated method of manufacturing a composite pipe.
  • the invention has been developed primarily for use in connection with storm water and sewerage pipes and will be described predominantly in terms of this application. It will be appreciated, however, that the invention is not limited to this particular field of use.
  • the sections to be connected are usually configured so that the outer diameter of each male end is smaller than the inner diameter of the corresponding female end of the adjoining section, so as to permit insertion of the male pipe end into the corresponding female pipe end.
  • This provides a basic mechanical connection, typically referred to as a "socket and spigot", or "bell and spigot” joint, which must then be secured and sealed.
  • One common form of pipe seal is takes the form of an O-ring.
  • This type of seal comprises an annular ring, normally of circular cross-sectional profile, formed from an elastomeric material such as rubber. It is typically retained within a circumferential retention groove formed around one end of a pipe section, normally the male end.
  • the O-ring is sized to protrude radially beyond the surface of the pipe end surrounding the groove, so that upon insertion into a corresponding female end of an adjoining pipe section, the O-ring is resiliently compressed into the radial clearance space defined between the male and female pipe ends.
  • a circumferential shoulder or groove is also formed around the inner periphery of the female pipe end to facilitate captive retention of the O-ring in the optimal position and to resist withdrawal of the adjoining pipe sections, following installation.
  • a further disadvantage with this system arises because for a given nominal inner diameter, the wall thickness and hence the outer diameter will vary according to the material strength, pressure rating and other design parameters of the pipeline. Accordingly, across a range of pipes, it is necessary to provide a corresponding array of differently sized collars for each internal pipe size. In the context of large-scale production across a comprehensive product range, this adds significantly to the cost of manufacturing, as well as the cost and complexity of inventory control. It is an object of the present invention to overcome or ameliorate one or more of these disadvantages of the prior art, or at least to provide a useful alternative.
  • the invention provides a pipe assembly including a first pipe section having a first end and a second end, a second pipe section having a first end and a second end, and an internal collar adapted for internal engagement with both the first end of the first pipe section and the second end of the second pipe section, the internal collar thereby locating the first and second pipe sections in end- to-end relationship at a joint to form a composite pipe.
  • composite pipe as used herein is intended to denote a pipe assembly formed from at least two discrete pipe sections and one or more pipe joints connecting the respective pipe sections together.
  • first and second pipe sections have substantially equal and substantially constant outer diameters, such that the external surface of the composite pipe is substantially flush across the join.
  • first and second pipe sections are substantially identical to one another. It will be appreciated, however, that this need not be the case.
  • the internal collar in the form of a transitional fitting can be used to join pipes of substantially different internal and/or external diameter or cross-sectional profile.
  • the first and second pipe sections have substantially equal and substantially constant imier diameters, such that the internal collar protrudes radially inwardly into the internal flow path in the vicinity of each join.
  • the pipe sections preferably have substantially constant inner and outer diameters throughout their lengths and in the preferred embodiment, take the form of hollow cylinders.
  • the ends of the internal collar are preferably designed for minimum impact on hydraulic performance, having regard to factors such as pressure drop, laminar and turbulence flows.
  • the ends of the internal collar are chamfered, to minimise creation of turbulence in fluid flowing through the pipe in the vicinity of the join.
  • the collar in this embodiment includes an outwardly extending circumferential locating flange positioned approximately midway along its length to define the position of maximum axial insertion of each end of the collar into the associated pipe end.
  • each end of each pipe section preferably includes an internal rebate defining an end section of reduced inner diameter adapted to accommodate one end of the internal collar.
  • the internal collar is configured to be nestingly located within a composite internal groove defined by a first internal rebate formed in the first end of the first pipe section and a complementary second internal rebate formed in the second end of the second pipe section. In this way, the internal collar is substantially flush with the internal bore of the composite pipe.
  • each rebate and the adjacent main pipe section is preferably chamfered or radiused to minimise stress concentrations.
  • the external surface of the composite pipe is preferably again substantially flush across the join.
  • the internal collar in this embodiment may also be provided with a circumferential locating flange, although the primary functionality of this flange may alternatively or additionally be provided by the rebates, which, if optimally positioned and shaped, ensure central location of the collar.
  • the locating flange may optionally be formed from, or coated with, a shock absorbent material, to absorb impact and minimise the potential for damage to the associated pipe ends during installation.
  • the pipe assembly includes a circumferential seal positioned radially between each end of the internal collar and the surrounding end of the associated pipe section, to seal the composite pipe at the join.
  • the composite pipe preferably includes a plurality of the first and second pipe sections, ideally being substantially identical in shape and configuration, and a corresponding plurality of internal collars and seals joining the respective pipe sections together, to form a pipeline.
  • the collars are sized relative to the pipe sections to provide a predetermined radial clearance sufficient in conjunction with seal compression to accommodate a limited degree of rotation between adjoining pipe sections about any axis normal to the longitudinal pipe axis, thereby to enable progressive changes of direction in the pipeline without the need for supplementary bends, fittings or connecting elements.
  • the invention provides an internal collar for use with a pipe assembly including a first pipe section having a first end and a second end and a second pipe section having a first end and a second end, the collar being configured for internal engagement with both the first end of the first pipe section and the second end of the second pipe section, the collar thereby in use locating the first and second pipe sections in end-to-end relationship to form a composite pipe.
  • the invention provides a first pipe section having a first end and a second end, for use in a pipe assembly, the pipe assembly further including a second pipe section having a first end and a second end and an internal collar, the first end of the first pipe section being, internally configured for connection to the second end of the second pipe section by simultaneous internal engagement of the collar with the with the first end of the first pipe section and the second end of the second pipe section, the collar thereby in use locating the first and second pipe sections in end-to- end relationship to form a composite pipe.
  • the second pipe section is substantially identical to the first pipe section.
  • the invention provides a method of forming a composite pipe, said method including the steps of:- forming a first pipe section having a first end and a second end; forming a second pipe section having a first end and a second end; forming an internal collar; and effecting simultaneous internal engagement of the collar with the first end of the first pipe section and the second end of the second pipe section; whereby the internal collar locates and retains the first and second pipe sections in end-to-end relationship to form a composite pipe.
  • the assembly and method of the invention can be used in connection with pipe fittings to enable pipes of different diameters to be joined together, or to enable pipes to be joined to ancillary components such as valves, manholes, pumped flanges, and the like.
  • FIG. 1 is a cross-sectional side elevation showing a pipe assembly according to a first embodiment of the invention
  • Figure 2 is a cross-sectional side elevation showing the internal collar from the pipe assembly of figure 1
  • Figure 3 is an end view of the collar shown in figure 2
  • Figure 4 is an enlarged cross-sectional detail showing a pipe assembly according to a second embodiment of the invention, in which the locating rib is omitted from the collar
  • Figure 5 is an enlarged cross-sectional detail showing a pipe assembly according to a third embodiment of the invention, in which the collar is located by internal rebates in the respective pipe ends
  • Figure 6 is an enlarged cross-sectional detail showing a pipe assembly according to a fourth embodiment of the invention, which is similar to the embodiment shown in figure 5 but wherein the collar additionally incorporates a central locating rib
  • Figure 7 is an enlarged cross-sectional detail showing a pipe
  • the invention provides a pipe assembly 1 including a first pipe section 2 having a first end 3 and a second end 4, and a second pipe section 5 having a first end 6 and a second end 7.
  • first and second pipe sections are substantially identical, although this need not be the case.
  • the assembly further includes a collar 8, having a first end 9, a second end 10, and a circumferential locating flange 11 extending radially outwardly from a central section of the collar.
  • the first end 9 of the collar is adapted for internal engagement with the first end 3 of the first pipe section 2, while the second end 10 of the collar is adapted for simultaneous internal engagement with the second end 7 of the second pipe section 5.
  • the collar locates and retains the first and second pipe sections in end-to-end relationship at a joint 14, to form a composite pipe 15.
  • the adjoining pipe ends abut the intermediate locating flange 11, to prevent over-insertion and to ensure that the collar is centrally positioned across the join in the assembled configuration.
  • Annular seals 16 are positioned in the radial clearance spaces defined between the respective ends of the internal collars and the corresponding pipe ends.
  • seals undergo radial compression upon assembly in the manner of an O-ring, V-ring or K-ring seal, to ensure effective sealing of the composite pipe at the join.
  • These seals following resilient compression upon installation, also transmit a radially directed force from each end of the collar to the surrounding internal walls of the respective pipe sections, so as to positively locate and removably secure the pipe sections to the respective ends of the collar.
  • the collar and pipe ends may be configured for interference fit, to provide similar location and retention functionality.
  • these seals are retained within circumferential seal retention grooves (not shown) formed in each end of the collar, each pipe end, or both.
  • the collar protrudes radially inwardly into the pipe flow path in the vicinity of each join, which obviates the need for internal rebates or recesses in the pipe ends to accommodate the collar. Weakening of the pipe ends is therefore avoided and the production process substantially simplified because the pipe sections have essentially constant wall thickness.
  • One possible downside with this arrangement is the introduction of turbulence into the fluid flowing through the pipe as a result of intrusion of the collar into the flow path.
  • the collar is sized relative to the pipe sections to provide a predetermined radial clearance, sufficient in conjunction with seal compression, to accommodate a limited degree of rotation between each adjoining pair of pipe sections, about any axis normal to the longitudinal pipe axis.
  • this longitudinal rotation enables progressive changes of direction in the pipeline without the need for supplementary connecting components such as junction boxes or elbow joints.
  • the use of double seals or gaskets may also be employed to enhance rotation.
  • the collar may be formed from concrete, clay, fibre reinforced plastic (FRP), fibre reinforced concrete (FRC), metal, or any other suitable material, depending upon the nature of the fluid intended to be carried in the pipe, the pressure rating of the pipe, the material composition of the pipe sections, and other relevant design parameters.
  • the pipe is designed primarily as a storm water or pressure pipe and is provided in a range of sizes suitable for that purpose.
  • a range of wall thicknesses or "classes”, and hence external diameters is ideally provided.
  • the optimum wall thickness or class will depend upon the desired pressure rating, burial depth and other relevant design criteria. By way of example only, for a 15 inch FRC pipe, the preferred wall thicknesses for the five standard classes would ideally range from 20 mm to 40 mm.
  • the prefened wall thicknesses for the five standard classes would ideally range from 48 mm to 95 mm. More generally, the internal diameter is preferably in the range of 10 to 50 inches and the wall thickness is preferably in the range of 10 m to 100 mm.
  • Figure 4 wherein corresponding features are denoted by conesponding reference numerals, shows a second embodiment of the invention, in which the locating flange is omitted from the collar.
  • this arrangement allows - li the pipe ends of adjoining sections to abut end-to-end.
  • this embodiment of the invention incorporates sealing retention grooves of the type previously described (again not shown), to facilitate centring of the collar between the surrounding pipe ends.
  • Figure 5 shows a third embodiment of the invention, in which the collar is located by internal rebates 21, in the respective pipe ends.
  • Each rebate 21 defines a section of reduced inner diameter in the associated pipe end, sized to accommodate a corresponding end of the internal collar 8.
  • the collar is thereby configured to be nestingly located within a composite internal groove defined by the contiguous rebates in the adjacent ends of adjoining pipe sections. Because this composite groove effectively performs the axial locating function, this embodiment of the invention does not require a central locating flange.
  • the collar is substantially flush with the internal bore of the composite pipe, the ends of the collar need not be chamfered to minimise turbulence within the pipe.
  • This embodiment of the invention is therefore particularly appropriate for use in pipeline applications requiring a constant internal cross-sectional profile, or in other words a smooth bore, whereby the collars do not protrude into the flow path or otherwise compromise the flow characteristics of the pipe.
  • the overall length of the collar is marginally less than the sum of the lengths of the rebates in the adjoining pipe ends. This avoids the possibility of the shoulders applying significant compressive load on the collar, which in certain circumstances can compromise sealing performance.
  • FIG. 6 shows a fourth embodiment of the invention, which is similar to that shown in figure 5 but wherein the collar additionally incorporates a central locating flange.
  • This flange operates in substantially the same manner as described in relation to the first embodiment of the invention, to centre the collar between the pipe sections and to prevent over-insertion into one pipe end or the other. In this case, the arrangement as illustrated similarly maintains a substantially constant internal cross- sectional flow area within the pipeline.
  • Figure 7 shows a fifth embodiment of the invention, which is essentially a variation on the version illustrated in figure 6.
  • the closed ends of the rebates incorporate respective chamfers 25 in the transition zones between the rebates and the adjacent main pipe sections.
  • the ends of the collar incorporate complementary chamfers 26. These chamfers help to minimise stress concentrations in the transition zones, and thereby significantly reduce the probability of failure during installation, and in response to seal compression. It will be appreciated, however, that other stress minimising transitional geometries, such as radii, may alternatively be used. It will be noted that in this embodiment, the collar is provided with a circumferential locating flange 11 of the type previously described.
  • FIG. 8 shows a variation on the third embodiment of the invention, with the collar engaged with the first pipe section, but prior to engagement with the second pipe section. This embodiment shows radiused, rather than chamfered, transition zones between the rebates and the corresponding main pipe sections.

Abstract

L'invention concerne un ensemble tuyau (1) qui comprend : une première section tuyau (2) présentant une première extrémité (3) et une deuxième extrémité (4) ; une deuxième section tuyau (5) présentant une première extrémité (6) et une deuxième extrémité (7) ; et un collier intérieur (8) conçu pour entrer en prise de manière intérieure avec la première extrémité de la première section tuyau et la deuxième extrémité de la deuxième section tuyau. Le collier (8) permet ainsi de positionner les première et deuxième sections de tuyau en relation bout à bout au niveau d'un raccord (14) afin que soit formé un tuyau composite (15). L'invention concerne également un procédé de formation d'un ensemble tuyau (1), qui comprend les étapes consistant : à former une première section tuyau (2) présentant une première extrémité (3) et une deuxième extrémité (4), : à former une deuxième section tuyau (5) présentant une première extrémité (6) et une deuxième extrémité (7) ; et à former un collier intérieur (8). Ce procédé comprend en outre une étape consistant à faire entrer en prise de manière simultanée le collier avec la première extrémité de la première section tuyau et la deuxième extrémité de la deuxième section tuyau, le collier positionnant et retenant les première et deuxième sections de tuyau en relation bout à bout afin que soit formé un tuyau composite.
PCT/AU2003/001689 2003-12-18 2003-12-18 Systeme de raccord de tuyau a collier interieur WO2005059423A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/AU2003/001689 WO2005059423A1 (fr) 2003-12-18 2003-12-18 Systeme de raccord de tuyau a collier interieur
AU2003287774A AU2003287774B8 (en) 2003-12-18 2003-12-18 Internally collared pipe joining system
NZ548052A NZ548052A (en) 2003-12-18 2003-12-18 Internally collared pipe joining system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AU2003/001689 WO2005059423A1 (fr) 2003-12-18 2003-12-18 Systeme de raccord de tuyau a collier interieur

Publications (1)

Publication Number Publication Date
WO2005059423A1 true WO2005059423A1 (fr) 2005-06-30

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PCT/AU2003/001689 WO2005059423A1 (fr) 2003-12-18 2003-12-18 Systeme de raccord de tuyau a collier interieur

Country Status (2)

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AU (1) AU2003287774B8 (fr)
WO (1) WO2005059423A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2442292A (en) * 2006-09-29 2008-04-02 Specialist Insulation Ltd Insulating products
DE102010039676A1 (de) * 2010-08-24 2012-03-01 Behr Gmbh & Co. Kg Verbindungsvorrichtung zum Verbinden von Aufstecköffnungen mindestens einer Kühlvorrichtung und Kühlsystem zum Kühlen von Elektronikkomponenten
CN103743080A (zh) * 2013-12-28 2014-04-23 柳州力通车用空调有限公司 一种汽车空调排水管

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762766A (en) * 1928-03-24 1930-06-10 Altmar Steel Products Company Pipe sleeve
US4277091A (en) * 1979-04-19 1981-07-07 Hunter John J Coupling for lined pipe
GB2129082A (en) * 1982-10-27 1984-05-10 Hepworth Iron Co Ltd Pipe couplings-cable supports
US5255945A (en) * 1991-12-02 1993-10-26 Solinst Canada Limited End-to-end jointing system for tubes and pipes
US6663145B1 (en) * 2000-11-06 2003-12-16 Group Timberline, Inc. Conduit coupling with interior grip rings

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5480196A (en) * 1994-08-15 1996-01-02 American Cast Iron Pipe Company Ductile iron pipe joint employing a coupling and coupling therefor
US7104574B2 (en) * 2000-01-20 2006-09-12 Uponor Eti Company Corrugated pipe connection joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762766A (en) * 1928-03-24 1930-06-10 Altmar Steel Products Company Pipe sleeve
US4277091A (en) * 1979-04-19 1981-07-07 Hunter John J Coupling for lined pipe
GB2129082A (en) * 1982-10-27 1984-05-10 Hepworth Iron Co Ltd Pipe couplings-cable supports
US5255945A (en) * 1991-12-02 1993-10-26 Solinst Canada Limited End-to-end jointing system for tubes and pipes
US6663145B1 (en) * 2000-11-06 2003-12-16 Group Timberline, Inc. Conduit coupling with interior grip rings

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2442292A (en) * 2006-09-29 2008-04-02 Specialist Insulation Ltd Insulating products
GB2442292B (en) * 2006-09-29 2008-10-15 Specialist Insulation Ltd Insulating ductwork products
US8950439B2 (en) 2006-09-29 2015-02-10 Spiralite Holdings Limited Insulated ductwork products
DE102010039676A1 (de) * 2010-08-24 2012-03-01 Behr Gmbh & Co. Kg Verbindungsvorrichtung zum Verbinden von Aufstecköffnungen mindestens einer Kühlvorrichtung und Kühlsystem zum Kühlen von Elektronikkomponenten
DE102010039676B4 (de) * 2010-08-24 2016-06-09 Mahle International Gmbh Kühlsystem zum Kühlen von Elektronikkomponenten
CN103743080A (zh) * 2013-12-28 2014-04-23 柳州力通车用空调有限公司 一种汽车空调排水管
CN103743080B (zh) * 2013-12-28 2017-06-23 柳州力通车用空调有限公司 一种汽车空调排水管

Also Published As

Publication number Publication date
AU2003287774B8 (en) 2009-01-08
AU2003287774A1 (en) 2005-07-05
AU2003287774B2 (en) 2008-12-18

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