WO1990002904A1 - Procede et appareil pour appliquer un revetement a une canalisation - Google Patents

Procede et appareil pour appliquer un revetement a une canalisation Download PDF

Info

Publication number
WO1990002904A1
WO1990002904A1 PCT/GB1989/001070 GB8901070W WO9002904A1 WO 1990002904 A1 WO1990002904 A1 WO 1990002904A1 GB 8901070 W GB8901070 W GB 8901070W WO 9002904 A1 WO9002904 A1 WO 9002904A1
Authority
WO
WIPO (PCT)
Prior art keywords
liner
pipe
die
section
cross
Prior art date
Application number
PCT/GB1989/001070
Other languages
English (en)
Inventor
Malcolm William Birch
George Philip Marshall
Alan Pilling
Original Assignee
North West Water Limited
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
Priority claimed from GB888821430A external-priority patent/GB8821430D0/en
Priority claimed from GB898906478A external-priority patent/GB8906478D0/en
Application filed by North West Water Limited filed Critical North West Water Limited
Publication of WO1990002904A1 publication Critical patent/WO1990002904A1/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
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/38—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor by liberation of internal stresses
    • B29C63/46—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor by liberation of internal stresses of internal surfaces

Definitions

  • This invention relates to pipe lining particularly but not exclusively to methods and apparatus for the lining of pipes in situ.
  • a method of lining a pipe without application of heat comprises moving a thermoplastic liner through a die to reduce the cross-section of the liner, the material of the liner comprising material from the group polyolefin, polyamide, polyvinyl chloride, acrylonitrile butadiene styrene, and introducing the reduced liner into the pipe , the liner subs equently moving into engagement with the inner surface of the pipe.
  • the liner may be allowed to recover in cross-section into engagement with the inner surface of the pipe or may be caused to move into said engagement by moving an expansion device through the liner.
  • the expansion device may be flexible in cross-section and may be a plurality of parts biassed outwards by resilient means.
  • the die may have a minimum cross-section in
  • the die may be mounted on the pipe whilst the liner is introduced into the pipe and may be in separable parts for subsequent removal from the pipe.
  • a method of lining a pipe comprises mounting a die on a pipe to be lined, and moving a liner through the die into the pipe.
  • the invention also provides a die for use in pipe lining having an orifice defined by parts which are separable from each other. Further the invention provides a die for use in pipe lining comprising a first part and a second part together defining a passage, the second part being removable from the first part and defining the minimum cross-section of the passage. There may be a plurality of second parts respectively defining different minimum cross-sections.
  • the die is of circular cross-section and the liner is of circular cross-section.
  • the invention may be performed in various ways and some specific embodiments with possible modifications will now be described by way of example with reference to the accompanying partly diagrammatic drawings, in which:
  • Fig. 1 is a side view part in section of part of a pipe lining device
  • Fig. 2 is a graph showing changes in liner diameter;
  • Fig. 3 shows a modification;
  • Fig. 4 shows a pipe lining arrangement
  • Fig. 5 shows a modification
  • Figs. 9, 10 are end view and longitudinal section
  • Figs. 11, 12 show a modification.
  • Underground water pipes may become cracked leading to leakage losses and one way of responding to this is to provide the pipe with a liner. If the pipe interior is encrusted or coated with deposits these should be removed by pulling a suitable pig through the pipe to leave a substantially smooth inner surface.
  • thermoplastic liner 10 e.g. of polyethylene, of initial diameter Do is inserted into a pipe 11 of inner diameter Dp.
  • the leading end 12 of the liner 10 is gripped to a plug 13 connected to a tow line 14 which is connected to a pulling device, for example a winch 15, to pull the liner into the pipe 11 without application of heat from an external source.
  • the liner 10 is pulled or drawn through a die 16 which has an inner surface 17 which tapers uniformly inwardly to a minimum diameter D 1 at essentially a single axial position 18
  • the surface 17 is polished.
  • the die and winch may be located in pits 20, 21 at the ends of the length 22 of pipe to be lined as shown in Fig. 4.
  • the die may be held in the end of the pipe to be re-lined.
  • D 2 see Figs. 2 and 3
  • the tension on the liner is released either by the trailing end of the liner leaving the die or by the liner being cut downstream of the die but upstream of the pipe.
  • the diameter of the pipe sharply increases to D3 (see Fig. 3) with a ⁇ hortening of the length of the liner.
  • the liner will then continue to recover in diameter as indicated at 25 Fig. 2 until it engages the inner surface of the pipe.
  • the liner would, in the absence of the pipe, recover to a diameter D 4 (less than Do) and thus firmly engages the inner surface of the pipe.
  • Successive lengths of pipe can be lined and successive lengths of liner can be joined to provide a continuous liner.
  • a s shown in Fig. 5 the die and winch can be at ground level with pulley 30o or other guides for the liner in the pits.
  • the tension is normally removed by pulling the trailing end of the liner through the die.
  • the die is positioned such that sufficient length of liner remains outside the pipe to accommodate subject
  • the die is located in the pit (Fig. 4) it is normally anchored to the existing pipe. In this case the drawing operation is stopped before the trailing end of the liner reaches the die and the tension is removed by relaxing tension on the winch cable. All subsequent contraction will then occur from the leading end of the liner. With this method the die is in two or more separable segments 50, 51 (Fig. 9 ) , normally held
  • the method utilises the viscoelastic properties of thermoplastics to enable a pipe or tube to be provided with a tightly fitting liner without the applicntion of heat.
  • a particular application is the use of the method to renovate pipes and mains in the Water Industry using polyethylene.
  • the use of a polyethylene liner provides resistance to corrosion, improves flow characteristics, and eliminates leakage from joints in the original pipe or main.
  • the method comprises:
  • thermoplastic liner Inserting the thermoplastic liner into the existing pipe whilst maintaining its reduced diameter by the application of a tensile axial force.
  • thermoplastic liner 10 of constant wall thickness and diameter Do is rigidly clamped to a tapered 'nose cone' or 'pulling head' 13.
  • the diameter of the nose cone is such that it is capable of passing through the reduction die 16 without contact.
  • the liner may be a continuously extruded length or formed by joining shorter individual lengths of extruded tube, typically by the butt-fusion welding technique.
  • a steel winch cable is threaded through both the pipe or main to be lined and the reducing die and attached to the nose cone by a shackle and rotating eyebolt 33.
  • thermoplastic pipe As tension is progressively applied to the cable by the winch the thermoplastic pipe is drawn into and through the rigidly held conical die, resulting in a gradual reduction in pipe outer diameter from D 0 to D 1 , accompanied by an increase in length. Cleanliness of the liner is important during the drawing or swaging operation to minimise
  • Lubrication of the die should preferably also be used to reduce friction.
  • a typical die has an included angle of 15°.
  • the diametral reduction may be chosen to suit the particular application. Typical reductions vary between 5 and 15% of the initial external diameter of the liner.
  • a generous radius 34 on the minor diameter of the die eliminates damage to the liner as it exits from the die.
  • the diametral and longitudinal strains introduced into the thermoplastic during the swaging operation consist of three components:
  • the major component is elastic strain which is
  • the lining thickness will be determined by the condition of the original pipe.
  • the liner and pipe may be considered as a composite structure enabling the use of thin liners supported by the pipe.
  • a full pressure-bearing liner will be used.
  • the advantage of the swaging process in the latter case are in minimising the amount and cost of excavation and reinstatement.
  • the degree of pipe reduction (Do - D1) in the die is a compromise between the clearance (Dp - D2) required to draw the liner through the pipe and the recovery required to ensure an interference fit (D4 - Dp) in the pipe.
  • Do - D4 the degree of pipe reduction
  • an absolute limitation on the die reduction is imposed by the requirement for a tight fit between the liner and pipe.
  • the load on the winch is determined by the force
  • thermoplastic liner wall proportional to the cross-sectional area of the thermoplastic liner wall and to the % reduction imposed and that this force is essentially independent of drawing speed.
  • the additional frictional load increases in proportion to the length of liner within the pipe or main.
  • the swaging operation induces longitudinal strains in the liner resulting in an increase in length.
  • the winch force maintains the longitudinal strain which in turn constrains the tendency to increase in diameter. It is therefore important that an axial force is maintained until the insertion operation is completed.
  • thermoplastic liner A method of reducing the diameter of the thermoplastic liner by drawing through a die without the application of heat.
  • This device may also be used to expand the liner into intimate contact with the host pipe in situations where, after scraping, it is found that there are numerous reduced sections (A, B in Fig. 8) which could prevent contact being made over the whole pipe length due to pinning at the sites of diameter reduction (e.g. between sections A & B in Fig. 8).
  • the re-expansion device 80 is a cylindrical/conical shape with segments (e.g. X and Y etc. in Fig. 6) which can be expanded by means of an actuator Z (Fig. 6).
  • the actuator may be a mechanical spring or a pneumatic or hydraulic system.
  • the expansion device is inserted into the liner and attached to a cable 81 previously placed inside the liner.
  • the other end of the cable is attached to a winch which is used to draw the expansion device 80 along the length of the liner.
  • the liner As the expansion device enters the lined system, the liner is forced into contact with the host pipe as shown in Fig. 7. Having made contact with the host pipe the
  • expansion device 90 has oppositely facing flexible curved parts 91 engaging the liner and pulled by line 92 connected to a winch.
  • the parts or segments 91 are angularly spaced so as to engage substantially the whole of the inner surface of the liner as the device 90 is pulled along the liner.
  • thermosplastics can be used for the liner e.g. the polyolefin family for example polypropylene; polyvinyl chloride (unplasticised or modified);
  • ABS acrylonitrile butadiene styrene
  • the piece 41 defines the minimum die diameter and is shaped to provide a smooth stepless junction with surface 17 of piece 40.
  • Pieces 41 may typically be removably held by bolts 42.
  • the invention can be used in pipes which may be required to carry water, sewage, gas, chemicals,

Landscapes

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

Abstract

On double une canalisation (11), par exemple une conduite d'eau, au moyen d'un revêtement intérieur en matière thermoplastique (10) que l'on fait passer à travers une filière (16) pour en réduire la section transversale avant de l'introduire dans la canalisation. Lorsque la tension axiale est relâchée, le revêtement intérieur reprend sa section transversale initiale et vient se plaquer contre la surface intérieure du tube. On peut aussi introduire un dispositif flexible d'expansion dans le revêtement pour le contraindre à se plaquer contre la canalisation. On peut monter la filière, qui comporte éventuellement plusieurs pièces, sur la canalisation. La partie de la filière où la section transversale est la plus petite peut être remplacée par une partie définissant une section transversale différente. Le revêtement intérieur peut être fabriqueée en polyoléfines, polyamide, chlorure de polyvinyle ou acrylonitrile butadiène styrène (ABS).
PCT/GB1989/001070 1988-09-13 1989-09-12 Procede et appareil pour appliquer un revetement a une canalisation WO1990002904A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB888821430A GB8821430D0 (en) 1988-09-13 1988-09-13 Improvements in/relating to pipe lining
GB8821430.9 1988-09-13
GB8825494.1 1988-11-01
GB888825494A GB8825494D0 (en) 1988-09-13 1988-11-01 Improvements in/relating to pipe lining
GB8906478.6 1989-03-21
GB898906478A GB8906478D0 (en) 1988-09-13 1989-03-21 Improvements in or relating to pipe lining

Publications (1)

Publication Number Publication Date
WO1990002904A1 true WO1990002904A1 (fr) 1990-03-22

Family

ID=27264077

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/001070 WO1990002904A1 (fr) 1988-09-13 1989-09-12 Procede et appareil pour appliquer un revetement a une canalisation

Country Status (3)

Country Link
AU (1) AU4328589A (fr)
GB (1) GB2225406B (fr)
WO (1) WO1990002904A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992012844A1 (fr) * 1991-01-22 1992-08-06 Pipe Rehab International, Inc. Procede d'insertion angulaire variable pour le garnissage interieur d'elements tubulaires
US5263843A (en) * 1990-07-02 1993-11-23 British Gas Plc Splittable die used in pipe lining
DE102004059525A1 (de) * 2004-12-09 2006-06-14 Endress + Hauser Flowtec Ag Einzugvorrichtung für eine Rohrauskleidung
WO2007023253A1 (fr) * 2005-08-26 2007-03-01 Victrex Manufacturing Limited Polyether et son utilisation pour un revetement
WO2010102741A3 (fr) * 2009-03-11 2011-03-10 Tracto-Technik Gmbh & Co. Kg Procédé et système pour introduire un tuyau dans un trou dans la terre
US8813332B2 (en) 2005-08-26 2014-08-26 Victrex Manufacturing Limited Polymeric materials
WO2014152743A1 (fr) * 2013-03-14 2014-09-25 SAK Construction, LLC Dispositif et système de traction d'un revêtement de tuyau comprimé dans un tuyau hôte
WO2014159567A1 (fr) * 2013-03-14 2014-10-02 SAK Construction, LLC Systèmes et appareils pour empêcher le retrait d'une chemise de tube comprimée dans un tube hôte

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244781B (en) * 1990-06-08 1993-12-08 Fordbrook Eng Ltd A process for lining a metal pipe
US5201118A (en) * 1992-03-09 1993-04-13 Mcparland Kevin W Process for repairing heat-exchanger tubes
GB0911579D0 (en) * 2009-07-03 2009-08-12 Brinker Technology Ltd Apparatus and methods for maintenance and repair of vessels
DE102010004097B4 (de) 2010-01-07 2019-06-19 Tracto-Technik Gmbh & Co. Kg Verfahren zum Sanieren eines Altrohrs sowie System zur Durchführung eines solchen Verfahrens

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1398057A (fr) * 1964-03-25 1965-05-07 Appareil pour le chemisage de conduits
US3462825A (en) * 1967-07-11 1969-08-26 Dore Co John L Method of lining tubular members
GB2084686A (en) * 1980-09-25 1982-04-15 British Steel Corp Lining pipework
EP0266951A2 (fr) * 1986-11-04 1988-05-11 Du Pont Canada Inc. Méthode de revêtement in-situ de tuyaux utilisant un revêtement à base de polymères

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2096557A1 (en) * 1970-06-29 1972-02-18 Dow Chemical Co Plastics lined pipes prodn - by introduction of compressed lining and allowing the lining to expand to grip the pipe wall
IT1003848B (it) * 1974-03-22 1976-06-10 Milani Resine Spa Calibratore a vuoto per corpi cavi estrusi di materiali termoplastici cedevoli
US4028037A (en) * 1975-03-17 1977-06-07 The Dow Chemical Company Tube treating and apparatus therefor
DE2827337A1 (de) * 1978-06-22 1980-01-10 Kabel Metallwerke Ghh Verfahren und vorrichtung zur massgenauen herstellung der seele eines koaxialen hochfrequenz-kabels
GB2186340B (en) * 1986-02-10 1990-08-01 British Gas Plc Method for lining a pipe or main
NZ228962A (en) * 1988-05-09 1990-08-28 British Gas Plc Lining buried or installed pipe with a polymer liner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1398057A (fr) * 1964-03-25 1965-05-07 Appareil pour le chemisage de conduits
US3462825A (en) * 1967-07-11 1969-08-26 Dore Co John L Method of lining tubular members
GB2084686A (en) * 1980-09-25 1982-04-15 British Steel Corp Lining pipework
EP0266951A2 (fr) * 1986-11-04 1988-05-11 Du Pont Canada Inc. Méthode de revêtement in-situ de tuyaux utilisant un revêtement à base de polymères

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5263843A (en) * 1990-07-02 1993-11-23 British Gas Plc Splittable die used in pipe lining
WO1992012844A1 (fr) * 1991-01-22 1992-08-06 Pipe Rehab International, Inc. Procede d'insertion angulaire variable pour le garnissage interieur d'elements tubulaires
AU667466B2 (en) * 1991-01-22 1996-03-28 Pipe Rehab International, Inc. Variable angular insertion method for lining tubular members
DE102004059525A1 (de) * 2004-12-09 2006-06-14 Endress + Hauser Flowtec Ag Einzugvorrichtung für eine Rohrauskleidung
US8813332B2 (en) 2005-08-26 2014-08-26 Victrex Manufacturing Limited Polymeric materials
JP2009505858A (ja) * 2005-08-26 2009-02-12 ビクトレックス マニュファクチャリング リミテッド ポリエーテルおよび裏打ちにおけるその使用
WO2007023253A1 (fr) * 2005-08-26 2007-03-01 Victrex Manufacturing Limited Polyether et son utilisation pour un revetement
WO2010102741A3 (fr) * 2009-03-11 2011-03-10 Tracto-Technik Gmbh & Co. Kg Procédé et système pour introduire un tuyau dans un trou dans la terre
GB2483376A (en) * 2009-03-11 2012-03-07 Tracto Technik Method and system for inserting a tube into a borehole in the soil
GB2483376B (en) * 2009-03-11 2013-03-20 Tracto Technik Method and system for inserting a tube into an undergound borehole
US9074423B2 (en) 2009-03-11 2015-07-07 Tracto-Technik Gmbh & Co. Method and system for inserting a pipe into an underground borehole
WO2014152743A1 (fr) * 2013-03-14 2014-09-25 SAK Construction, LLC Dispositif et système de traction d'un revêtement de tuyau comprimé dans un tuyau hôte
WO2014159567A1 (fr) * 2013-03-14 2014-10-02 SAK Construction, LLC Systèmes et appareils pour empêcher le retrait d'une chemise de tube comprimée dans un tube hôte
US9322502B2 (en) 2013-03-14 2016-04-26 SAK Construction, LLC Device and system for pulling a compressed pipe liner into a host pipe
US9377149B2 (en) 2013-03-14 2016-06-28 SAK Construction, LLC Systems and apparatus for inhibiting a compressed pipe liner from retreating into a host pipe

Also Published As

Publication number Publication date
GB8920612D0 (en) 1989-10-25
GB2225406B (en) 1993-05-19
GB2225406A (en) 1990-05-30
AU4328589A (en) 1990-04-02

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