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WO1987003840A1 - Method and means for applying flexible liners to pipes - Google Patents

Method and means for applying flexible liners to pipes Download PDF

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Publication number
WO1987003840A1
WO1987003840A1 PCT/AU1986/000362 AU8600362W WO8703840A1 WO 1987003840 A1 WO1987003840 A1 WO 1987003840A1 AU 8600362 W AU8600362 W AU 8600362W WO 8703840 A1 WO8703840 A1 WO 8703840A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
pipe
collapsed
strap
maintained
Prior art date
Application number
PCT/AU1986/000362
Other languages
French (fr)
Inventor
Roy Binall Skott
Original Assignee
Roy Binall Skott
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 Roy Binall Skott filed Critical Roy Binall Skott
Publication of WO1987003840A1 publication Critical patent/WO1987003840A1/en

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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/08—Bending or folding of tubes or other profiled members
    • B29C53/086—Bending or folding of tubes or other profiled members bending radially, i.e. deformig the cross-section of the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26—Lining or sheathing of internal surfaces
    • B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
    • B29C63/343—Lining or sheathing of internal surfaces using tubular layers or sheathings the tubular sheathing having a deformed non-circular cross-section prior to introduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5092—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the tape handling mechanisms, e.g. using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7855—Provisory fixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0014—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping tubes or blown tubular films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B29C66/4722—Fixing strips to surfaces other than edge faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered

Definitions

  • the present invention relates to the lining of pipes and more particularly to the lining of pipes with a plastics material.
  • the invention provides an improved in-situ method for pipe lining which has special utility for underground pipe systems.
  • the present invention provides a method of lining a pipe comprising the steps of providing a semi-rigid plastics tube having an external diameter corresponding to the internal diameter of the pipe to be lined, forcibly collapsing the tube so as to form at least one longitudinally extending depression of the tube thereby decreasing the diameter of the tube, fixing a longitudinally extending tearable strap to or about the pipe so as to maintain the collapsed configuration. introducing the collapsed tube in its maintained collapsed configuration into the pipe for a desired distance along and within the pipe and releasing the strap in order to restore the tube to its original shape and bring it into frictional contact with the internal wall of the pipe.
  • the present invention provides a semi-rigid plastics tube maintained in a collapsed shape comprising at least one longitudinally extending depression of the tube and a tearable strap fixed to or extending around the tube to maintain the maximum diameter of the collapsed tube at a lesser dimension than when the tube is uncollapsed.
  • the strap may be composed of a laminated plastic film which is heat welded to the tube.
  • the strap is in the form of a plastics film wrapped all the way round the deformed or collapsed plastics tube so that the film is welded to itself to maintain the tube in its collapsed configuration. This arrangement is particularly appropriate where the film cannot be readily adhered to the material of the tube. In such embodiments, release of the strap could be effected by cutting the strap or by pressurizing the tube.
  • Figs. 1 and 2 are cross-sectional views of an undefined length of extruded plastics tubing;
  • Fig. 3 is a cross-sectional view of the same piece of tubing together with a welded on plastics strap;
  • Figs. 4 and 5 are cross-sections of a second form of the invention.
  • Fig. 6 is a cross-sectional view similar to Fig. 3 with a plastics strap welded to itself; and Fig. 7 is a schematic representation of a system according to the invention for the in situ collapsing of tubing and lining of pipes.
  • Fig. 1 shows a cross-section of a tube 1 which can be 5 of an extruded plastics material such as low density polythene. As shown, the tube 1 has an outside diameter, D, so chosen as to correspond to the inside diameter of the pipe (not shown) to be lined. In Fig. 2 the same tube 1 is shown after it has been forcibly
  • the collapsed tubing can be conveniently spool fixed for delivery.
  • apparatus can be provided to perform the collapsing and securing of the collapsed tube, such apparatus comprising roller means and heat welding means.
  • Fig. 7 a spool of uncollapsed
  • roller means 4a, 4b first substantially flatten and then arcuate the tubing, respectively, so as to produce a cross-sectional configuration as shown in Fig. 2.
  • a welding station 5 In close proximity to the roller means 4b is provided a welding station 5 which receives and fixes a tearable film 2 to the tube thereby maintaining the tube in a collapsed configuration as shown in Fig. 3.
  • the tubing is then introduced within and along a pipe 6.
  • FIG. 4 A further embodiment is hereafter described having reference to Figs. 4 and 5 in which the invention has improved application to the lining of larger diameter pipes.
  • a tube of extruded plastics material such as low density polythene is provided as previously indicated in Fig. 1 and having a larger diameter to correspond to the inside diameter of larger pipes desired to be lined.
  • the tube is substantially flattened as shown in Fig. 4 and subsequently arcuated as shown in Fig. 5. Description of this embodiment is in other respects as discussed above.
  • This second embodiment has improved practical value since the flattened liner shown in Fig. 4 can be spool fixed for delivery thereby obviating the necessity of roller means 4a.
  • further steps can be taken to reduce the on-site apparatus shown in Fig. 7 and thereby increase the versatility of applications of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

To line the internal surface of a pipe (6) such as a water, gas or drain pipe an inner plastics semi-rigid lining (1) is collapsed and retained in collapsed condition by a tearable strap (2). The collapsed state of the lining (1) being of a lesser maximum diameter than the underformed lining (1) so that it can readily fit within and along pipe (6). Severing of the strap (2) allows the lining (1) to resiliently expand to its original shape and closely fit the internal wall of the pipe (6).

Description

"METHOD AND MEANS FOR APPLYING FLEXIBLE LINERS TO PIPES
The present invention relates to the lining of pipes and more particularly to the lining of pipes with a plastics material. The invention provides an improved in-situ method for pipe lining which has special utility for underground pipe systems.
Various methods have been proposed for lining pipes, however, the present invention overcomes certain impracticalities inherent in the prior art. Common in the field has been a proposal to provide adhesive means to bond a plastics material liner to the inner surface of the pipe, in one particular method an adhesive is applied to the inner surface of the liner and the liner progressively axially everted within the pipe by means of compressed air. In another method, the inner surface of the pipe is coated with a radiation curable adhesive and an extruded thermoplastic liner is introduced into the pipe, bonding being effected by means of a travelling radiation source. The present invention provides means whereby a- — - plastics material liner can be frictionally affixed to the inner surface of a pipe thereby overcoming the necessity of adhesive means. Additionally, frictional location of the liner overcomes the problems associated with thermally activated methods allowing, in particular, non-metallic pipes to be lined.
The present invention provides a method of lining a pipe comprising the steps of providing a semi-rigid plastics tube having an external diameter corresponding to the internal diameter of the pipe to be lined, forcibly collapsing the tube so as to form at least one longitudinally extending depression of the tube thereby decreasing the diameter of the tube, fixing a longitudinally extending tearable strap to or about the pipe so as to maintain the collapsed configuration. introducing the collapsed tube in its maintained collapsed configuration into the pipe for a desired distance along and within the pipe and releasing the strap in order to restore the tube to its original shape and bring it into frictional contact with the internal wall of the pipe. In another form the present invention provides a semi-rigid plastics tube maintained in a collapsed shape comprising at least one longitudinally extending depression of the tube and a tearable strap fixed to or extending around the tube to maintain the maximum diameter of the collapsed tube at a lesser dimension than when the tube is uncollapsed.
In a preferred embodiment the strap may be composed of a laminated plastic film which is heat welded to the tube. In another embodiment the strap is in the form of a plastics film wrapped all the way round the deformed or collapsed plastics tube so that the film is welded to itself to maintain the tube in its collapsed configuration. This arrangement is particularly appropriate where the film cannot be readily adhered to the material of the tube. In such embodiments, release of the strap could be effected by cutting the strap or by pressurizing the tube.
In order that the invention may be better understood preferred forms thereof are hereinafter described by way of example with reference to the accompanying drawings in which:
Figs. 1 and 2 are cross-sectional views of an undefined length of extruded plastics tubing; Fig. 3 is a cross-sectional view of the same piece of tubing together with a welded on plastics strap;
Figs. 4 and 5 are cross-sections of a second form of the invention;
Fig. 6 is a cross-sectional view similar to Fig. 3 with a plastics strap welded to itself; and Fig. 7 is a schematic representation of a system according to the invention for the in situ collapsing of tubing and lining of pipes.
Fig. 1 shows a cross-section of a tube 1 which can be 5 of an extruded plastics material such as low density polythene. As shown, the tube 1 has an outside diameter, D, so chosen as to correspond to the inside diameter of the pipe (not shown) to be lined. In Fig. 2 the same tube 1 is shown after it has been forcibly
1Q collapsed into a typical configuration having a major cross-sectional axis, d, such that d<D. This configuration is maintained by a tearable film 2 which is heat welded onto the tube as shown in Fig. 3. In this maintained collapsed configuration the tube 1 is
15 introduced for a desired distance within and along the pipe to be lined. The film 2 is then cut or otherwise broken to enable the tube to return to its original shape. As the liner 1 returns to its original diameter, D, it frictionally engages the interior wall of the pipe.
Z0 Referring to Fig. 6, the only variation from the arrangement of Fig. 3 is that the film 2 wraps around tube 1 and is welded or adhered to itself rather than being affixed to tube 1. This arrangement is appropriate where the materials of the film 2 and tube 1 are not
Z5 compatible for welding or the like. Where a tube 1 is to be employed in a high temperature or corrosive environment it may be necessary to use cross-linked polyethylene or polybutylene as the tube material such that welding of a film 2 may not be suitable.
30 The collapsed tubing can be conveniently spool fixed for delivery. Alternatively, on site apparatus can be provided to perform the collapsing and securing of the collapsed tube, such apparatus comprising roller means and heat welding means. In Fig. 7 a spool of uncollapsed
25 tubing 1 is shown generally at 3. Roller means 4a, 4b first substantially flatten and then arcuate the tubing, respectively, so as to produce a cross-sectional configuration as shown in Fig. 2. In close proximity to the roller means 4b is provided a welding station 5 which receives and fixes a tearable film 2 to the tube thereby maintaining the tube in a collapsed configuration as shown in Fig. 3. The tubing is then introduced within and along a pipe 6.
The embodiments described having regard to Figs. 1-3 and 6 is especially suited to the lining of small diameter pipes. A further embodiment is hereafter described having reference to Figs. 4 and 5 in which the invention has improved application to the lining of larger diameter pipes. A tube of extruded plastics material such as low density polythene is provided as previously indicated in Fig. 1 and having a larger diameter to correspond to the inside diameter of larger pipes desired to be lined. The tube is substantially flattened as shown in Fig. 4 and subsequently arcuated as shown in Fig. 5. Description of this embodiment is in other respects as discussed above. This second embodiment has improved practical value since the flattened liner shown in Fig. 4 can be spool fixed for delivery thereby obviating the necessity of roller means 4a. Clearly, further steps can be taken to reduce the on-site apparatus shown in Fig. 7 and thereby increase the versatility of applications of the invention.

Claims

CLAIMS:-
1. A method of lining a pipe comprising the steps of providing a semi-rigid plastics tube having an external diameter corresponding to the internal diameter of the pipe to be lined, forcibly collapsing the tube so as to form at least one longitudinally extending depression of the tube thereby decreasing the diameter of the tube, fixing a longitudinally extending tearable strap to or about the pipe so as to maintain the collapsed configuration, introducing the collapsed tube in its maintained collapsed configuration into the pipe for a desired distance along and within the pipe and releasing the strap in order to restore the tube to its original shape and bring it into frictional contact with the internal wall of the pipe.
2. A method as claimed in claim 1, wherein the tearable strap is welded to the tube.
3. A method as claimed in claim 1, wherein the tearable strap surrounds the collapsed tube and is affixed to itself.
4. A method as claimed in any one of the preceding claims, wherein the tube is collapsed and maintained in its collapsed configuration at a location remote from the pipe then transported to be introduced into the pipe.
5. A method as claimed in any one of claims 1 to 3, wherein the tube is collapsed and maintained in its collapsed configuration at a location adjacent the pipe to be lined.
6. A method as claimed in any one of the preceding claims, wherein the tube is produced from any one of polyethylene and its copolymers, cross-linked polythene and polybutylene.
7. A semi-rigid plastics tube maintained in a collapsed shape comprising at least one longitudinally extending depression of the tube and a tearable strap fixed to or extending around the tube to maintain the maximum diameter of the collapsed tube at a lesser dimension than when the tube is uncollapsed.
8. A plastics tube as claimed in claim 7, wherein the tube is produced from any one of polyethylene and its copolymers, cross-linked polythene and polybutylene.
9. A method of lining a pipe substantially as hereinbefore described with reference to the accompanying drawings.
10. A semi-rigid plastics tube maintained in a collapsed state substantially as hereinbefore described with reference to Figs. 1-3, 4 and 5 or Fig. 6 of the accompanying drawings.
PCT/AU1986/000362 1985-12-20 1986-11-25 Method and means for applying flexible liners to pipes WO1987003840A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPH3973 1985-12-20
AU397385 1985-12-20

Publications (1)

Publication Number Publication Date
WO1987003840A1 true WO1987003840A1 (en) 1987-07-02

Family

ID=3694452

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1986/000362 WO1987003840A1 (en) 1985-12-20 1986-11-25 Method and means for applying flexible liners to pipes

Country Status (2)

Country Link
EP (1) EP0263830A1 (en)
WO (1) WO1987003840A1 (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301697A2 (en) * 1987-07-27 1989-02-01 Pipe Liners, Inc. A method and apparatus for producing a deformed pipe liner of tubular cross-section.
GB2227545A (en) * 1989-01-04 1990-08-01 Subterra Ltd Lining pipes
US4985196A (en) * 1987-10-30 1991-01-15 Pipe Liners, Inc. Pipe liner process
US4986951A (en) * 1987-07-27 1991-01-22 Pipe Liners, Inc. Pipe liner process
US4998871A (en) * 1989-01-19 1991-03-12 Pipe Liners, Inc. Apparatus for deforming plastic tubing for lining pipe
US5071616A (en) * 1987-07-13 1991-12-10 Osaka Bosui Construction Co., Ltd. Method of inserting rigid plastic lining tube through pipe
US5091137A (en) * 1989-01-19 1992-02-25 Pipe Liners, Inc. Pipe lining process
GB2227543B (en) * 1988-12-22 1992-09-16 Victaulic Plc Apparatus for and methods of lining pipework
US5395472A (en) * 1992-08-20 1995-03-07 Mandich; Ivan C. Lining system and methods for installing plastic liners in a pipe
WO1998009797A1 (en) * 1996-09-05 1998-03-12 United Utilities Plc Method and apparatus for lining a conduit
WO2000040888A1 (en) 1998-12-31 2000-07-13 Cempipe Limited A pipe liner, a liner product and methods for forming and installing the liner
US6167913B1 (en) 1999-01-13 2001-01-02 Cempipe Ltd. Pipe liner, a liner product and methods for forming and installing the liner
GB2357559A (en) * 1999-12-24 2001-06-27 Glynwed Pipe Systems Ltd Multilayer liner pipe comprising a cross-linked polyolefin
EP1271737A1 (en) * 2001-06-27 2003-01-02 Alcatel Device for fastening a cable in a pipe
US6723266B1 (en) 2002-11-18 2004-04-20 Raymond Lippiatt Lining of underground pipes
DE3912205C5 (en) * 1988-04-13 2004-05-27 Ina Acquisition Corp., Wilmington Method and device for installing a replacement pipe in an existing underground line
US7104574B2 (en) 2000-01-20 2006-09-12 Uponor Eti Company Corrugated pipe connection joint
WO2014202219A1 (en) * 2013-06-21 2014-12-24 Rehau Ag + Co Stabilized pipe having a reduced cross-section and method for stabilizing said pipe
CN108662355A (en) * 2014-02-27 2018-10-16 国际壳牌研究有限公司 For the lined method and system of pipe
CN109454153A (en) * 2018-11-23 2019-03-12 五行科技股份有限公司 A kind of hose pressure U device and pressure U method
US11698070B2 (en) 2017-03-20 2023-07-11 Recyca-Pipe Of America L.L.C. Grouting material delivery and application system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199090A1 (en) * 1972-09-07 1974-04-05 Stabilator Ab
AU3837378A (en) * 1977-07-27 1980-01-31 Trio Engineering Limited Anin-situ method of lining underground passage
AU1654283A (en) * 1982-07-02 1984-01-05 Trio Engineering Limited Method of lining passageways
AU3621984A (en) * 1983-12-06 1985-06-13 Norio Takei A lined pipe and method of lining a pipe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199090A1 (en) * 1972-09-07 1974-04-05 Stabilator Ab
AU3837378A (en) * 1977-07-27 1980-01-31 Trio Engineering Limited Anin-situ method of lining underground passage
AU1654283A (en) * 1982-07-02 1984-01-05 Trio Engineering Limited Method of lining passageways
AU3621984A (en) * 1983-12-06 1985-06-13 Norio Takei A lined pipe and method of lining a pipe

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5071616A (en) * 1987-07-13 1991-12-10 Osaka Bosui Construction Co., Ltd. Method of inserting rigid plastic lining tube through pipe
US4986951A (en) * 1987-07-27 1991-01-22 Pipe Liners, Inc. Pipe liner process
EP0301697A2 (en) * 1987-07-27 1989-02-01 Pipe Liners, Inc. A method and apparatus for producing a deformed pipe liner of tubular cross-section.
EP0301697A3 (en) * 1987-07-27 1990-10-17 Pipe Liners Inc A method and apparatus for producing a deformed pipe liner of tubular cross-section and a process and apparatus for installing a thermoplastic liner in a pipe
US4985196A (en) * 1987-10-30 1991-01-15 Pipe Liners, Inc. Pipe liner process
DE3912205C5 (en) * 1988-04-13 2004-05-27 Ina Acquisition Corp., Wilmington Method and device for installing a replacement pipe in an existing underground line
GB2227543B (en) * 1988-12-22 1992-09-16 Victaulic Plc Apparatus for and methods of lining pipework
GB2227545B (en) * 1989-01-04 1992-09-16 Subterra Ltd Lining pipes
GB2227545A (en) * 1989-01-04 1990-08-01 Subterra Ltd Lining pipes
US4998871A (en) * 1989-01-19 1991-03-12 Pipe Liners, Inc. Apparatus for deforming plastic tubing for lining pipe
US5091137A (en) * 1989-01-19 1992-02-25 Pipe Liners, Inc. Pipe lining process
US5395472A (en) * 1992-08-20 1995-03-07 Mandich; Ivan C. Lining system and methods for installing plastic liners in a pipe
WO1998009797A1 (en) * 1996-09-05 1998-03-12 United Utilities Plc Method and apparatus for lining a conduit
WO2000040888A1 (en) 1998-12-31 2000-07-13 Cempipe Limited A pipe liner, a liner product and methods for forming and installing the liner
US6167913B1 (en) 1999-01-13 2001-01-02 Cempipe Ltd. Pipe liner, a liner product and methods for forming and installing the liner
GB2357559A (en) * 1999-12-24 2001-06-27 Glynwed Pipe Systems Ltd Multilayer liner pipe comprising a cross-linked polyolefin
GB2357559B (en) * 1999-12-24 2004-06-16 Glynwed Pipe Systems Ltd Multi-layer liner for pipes
US7104574B2 (en) 2000-01-20 2006-09-12 Uponor Eti Company Corrugated pipe connection joint
EP1271737A1 (en) * 2001-06-27 2003-01-02 Alcatel Device for fastening a cable in a pipe
US6889712B2 (en) 2001-06-27 2005-05-10 Alcatel Device for fixing a cable in a pipe
US6723266B1 (en) 2002-11-18 2004-04-20 Raymond Lippiatt Lining of underground pipes
WO2014202219A1 (en) * 2013-06-21 2014-12-24 Rehau Ag + Co Stabilized pipe having a reduced cross-section and method for stabilizing said pipe
AT17192U1 (en) * 2013-06-21 2021-08-15 Rehau Ag & Co Stabilized pipe with reduced cross-section and method for its stabilization
CN108662355A (en) * 2014-02-27 2018-10-16 国际壳牌研究有限公司 For the lined method and system of pipe
US10858918B2 (en) 2014-02-27 2020-12-08 Shell Oil Company Method and system for lining a tubular
CN108662355B (en) * 2014-02-27 2024-03-19 国际壳牌研究有限公司 Method and system for lining a pipe
US11698070B2 (en) 2017-03-20 2023-07-11 Recyca-Pipe Of America L.L.C. Grouting material delivery and application system
CN109454153A (en) * 2018-11-23 2019-03-12 五行科技股份有限公司 A kind of hose pressure U device and pressure U method

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