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WO2007068932A1 - Application et procede destines au revetement de canalisations - Google Patents

Application et procede destines au revetement de canalisations Download PDF

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Publication number
WO2007068932A1
WO2007068932A1 PCT/GB2006/004683 GB2006004683W WO2007068932A1 WO 2007068932 A1 WO2007068932 A1 WO 2007068932A1 GB 2006004683 W GB2006004683 W GB 2006004683W WO 2007068932 A1 WO2007068932 A1 WO 2007068932A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipeline
liner
fluid
along
heating means
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/GB2006/004683
Other languages
English (en)
Inventor
Brian Burnett Chandler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PDFM Ltd
Original Assignee
PDFM 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 PDFM Ltd filed Critical PDFM Ltd
Publication of WO2007068932A1 publication Critical patent/WO2007068932A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B29C63/28—Lining or sheathing of internal surfaces applied by "rubber" bag or diaphragm
    • 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
    • F16L55/1654—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 and being inflated
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/10—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation for articles of indefinite length
    • 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
    • B29C63/0065—Heat treatment
    • B29C63/0069—Heat treatment of tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Definitions

  • the invention to which this application relates is to apparatus and a method which allows the interior surface of a pipeline or sewer to be lined to thereby seal any cracks or leaks which may have occurred in the pipeline or sewer or generally to line the interior of the same to thereby prolong the life of the pipeline or sewer. Furthermore, the lining can be achieved in accordance with the invention without the need for the pipeline or sewer to be excavated or otherwise worked on to form the lining.
  • pipelines in a non-limiting manner
  • Many variations have been developed subsequently in an attempt to overcome the inherent problems with the conventional lining approach, to improve the quality of the lining which is achieved and also to improve the efficiency and speed with which the lining can be formed.
  • a major problematic factor in the provision of linings is the manpower and time which is required to form the same.
  • An aim of the present invention is therefore to provide a lining method, and apparatus which allows the lining to be formed in an improved manner with the efficiency in terms of apparatus and manpower required being improved.
  • apparatus for the formation of a lining of a pipeline said lining formed from one or more tubular members placed into the pipeline and said apparatus including insertion means to allow the one or more tubular members to be inserted into the pipeline, heating means provided to be movable in a first direction along the interior of the one or more tubular members when in position in the pipeline, propulsion means mounted to the rear of the heating means, first and second fluid supplies to introduce fluid in front and to the rear of the propulsion means respectively and wherein said second fluid is introduced at a pressure greater than the pressure of the first fluid, which differential is maintained as the propulsion means and heating means advance along the pipeline.
  • the first fluid is a gas such as air and the second fluid is a liquid such as water.
  • the first fluid is provided to cause expansion of the tubular members liner tight against the inner surface of the pipe line to line the same, whereupon the second fluid prime function is to cool and chill the expanded lining and to relieve any axial thermal shrinkage by drawing on any soft material from the heated area.
  • This chilling effect serves to freeze the molecules of the tubular member material which are reoriented by the heating process, in their new position, after heating.
  • the heating means comprise a plurality of light emitting heat sources such as short wave infrared heaters.
  • the heat sources are provided to apply heat to pass through the wall of the tubular members to heat the same and provide a sufficient flexibility of the same to allow the first fluid and /or propulsion means to expand and retain the walls of the tubular member against the inner surface of the pipeline.
  • all of the expansion of the heated lining is achieved by the first fluid in advance of the propulsion means moving along the pipeline.
  • the heating means are controlled such that a first heat source imparts a first heating temperature and the second heat source, following the first along the pipeline, imparts a second heating temperature onto the tubular member so as to ensure that the heating effect is achieved throughout the walls of the tubular member prior to the expansion of the same, and thus overcome the temperature gradient across the thickness of the tubular member walls and provide a uniform heating affect.
  • the first and second heat sources of the heating means are connected such that they are maintained in a spaced configuration as they are pushed along the interior of the pipeline.
  • the end of the second heat source is connected to the front of the propulsion means by a rigid member such as a rod which maintains the spacing of the heat source from the propulsion means and allows the heat source to be advanced by movement of the propulsion means.
  • the first and second heat sources are in turn spaced apart by a further rod.
  • the said first and second rods are also used to carry a power supply cable and cooling water supply hose to the first and second heat sources.
  • the differential in pressure between the respective fluids is selected so as to cause the advancement of the propulsion means along the pipeline but, at the same time, ensures that the speed of advancement is at a rate so as to ensure that the heating effect which is created by the heat sources is achieved uniformly throughout the walls of the tubular members thereby ensuring that the tubular members are of sufficiently flexible condition to allow the same to be expanded by the first fluid and retained against the inside surfaces of the pipeline so as to line the same. It is also preferred that the speed of movement of the propulsion means allows the second fluid to contact the tubular member walls as soon as possible after expansion has occurred to provide cooling and hence maintenance of the reoriented position of the molecules of the tubular members.
  • the same are inserted into the pipeline in a form in which the respective ends of the same are joined together one at a time prior to insertion into the pipeline to form a liner which is of the required length for the length of lining which is to be formed along the pipeline.
  • the power is supplied to the heat sources from the up stream end of the pipeline contained in a water hose with water pressure at least 0.5 of a bar more than the pressure of the second fluid behind the propulsion means.
  • This hose and power cable passes through the middle of the propulsion means, along the first and second rods and through the middle of the heat sources, with a gland taking power off as and when required for the heat source operation.
  • the water is fed into a double containment tube around the outside of each of the heat sources and this water is pumped/fed back to the propulsion means and exits at a location that is well to the rear of the propulsion means as this water is now warmer than that which is introduced directly to the rear of the propulsion means.
  • the water supplied to the heat sources is at a higher pressure to allow it to be fed back to the upstream end of the propulsion means and it provides a cooling effect on the glass housing of the heat sources.
  • the cooling water to motivate the propulsion means is preferably directly pumped to the rear face of the propulsion means to keep the cooling surfaces and hence cooling effect of the propulsion means on the heated liner as cool as possible.
  • PE 100 When using tubular members formed from PE 100 instead of PVC U or CPVC extra carbon black may be added to facilitate easy heating and the members can be joined above ground by butt fusion.
  • the PE 100 material may require more heat than PVC tubular members and is a thicker material for comparable properties and may be used on large pipes sizes where CPVC is not made.
  • the respective ends are joined together by forming tapered screw threads in male and female formations and bringing the male and female screw formations together to engage the ends or other joining formations may be used.
  • the tubular members are formed of a plastics material and in one embodiment, include a quantity of carbon black therein.
  • the plastics material used is Polyvinyl Chloride (PVC) and can be modified by the addition of an ethylene copolymer (CPE) or alternatively is PEl OO pipe or HDPE pipe.
  • carbon black is introduced into the material used to form the tubular member such that as the tubular members are formed, typically by extrusion, the carbon black is dispersed through the walls of the tubular member.
  • the carbon black material is included at around 2.0-3% of the material which is used to extrude the tubular member, and more typically is 2.5% of the material.
  • the carbon black serves to attract the shortwave infrared heat from the heat sources and thereby accelerates the heating effect.
  • an overlying shrink sleeve typically of PVC is located around the join and which remains as a tight fit around the j oin at all times.
  • second heating means are provided so as to heat the one or more tubular members prior to insertion into the pipeline so as to render the tubular members sufficiently flexible so as to allow the same to pass through the access point into the pipeline.
  • introduction into the pipeline is achieved by use of a shoe guide to prevent the liner from kinking or being scored.
  • the formation of the outer edges of the propulsion means is determined by the host pipe and propulsion is provided by the difference in pressure of the first and second fluids on either side of the propulsion means. The difference is such so to cause the propulsion means to be propelled forward by the higher pressure second fluid introduced behind it.
  • the propulsion means accommodates variations in the internal diameter of the host pipeline and also may be resilient or have additional formations to allow fluctuations in the existing pipeline and/or liner to be accommodated.
  • the propulsion means can also be referred to as a pig or a bladder.
  • apparatus for the formation of a lining of a pipeline including a liner along which heating means are moved to heat the liner to a condition to allow the same to be expanded to contact the inner surface of the pipeline and wherein the heating means comprise at least one light media heat source.
  • a plurality of spaced heat sources are provided, said heat sources spaced linearly along the liner.
  • the light media is an infra red heat source.
  • a method of lining a pipeline comprising the steps of forming a liner of a length which is the same or greater than the required length of lining, inserting the liner into the pipeline via a first access point, and positioning the liner along the pipeline to be lined, passing heating means into and along the liner interior, inserting and passing along the liner interior propulsion means after the heating means and introducing a second fluid into the interior of the liner to the rear of the propulsion means and wherein the pressure of the said fluid is greater than the pressure of a first fluid in advance of the propulsion means .
  • the difference in the fluid pressure thereby causes the propulsion means and hence heating means to be advanced along the liner and as they do provide the heating effect to allow expansion of the liner and a cooling effect to retain the liner in the expanded condition.
  • the liner can be heated prior to insertion along the pipeline to aid the insertion.
  • the first fluid is air and the second fluid is water.
  • the differential in pressure is sufficient to cause the propulsion means and heating means to be propelled in a controlled manner along the liner interior.
  • the movement of the propulsion means along the liner under the influence of the fluid also causes the movement of the heating means positioned to the front of the expansion means along the liner.
  • the heating means in the liner includes heat sources in the form of at least first and second infrared heaters which are spaced apart and are controlled so as to provide, in combination, a heating effect throughout the walls of the liner to thereby provide sufficient flexibility in the same to allow the first fluid to exert an expansion force on the liner to bring the walls of the same into contact with the inner surface of the pipeline and line it
  • the liner can be preheated above the surface of the pipe line as the liner is installed into the host pipeline.
  • the liner is made from PVC with other suitable components added thereto to improve the utilisation of the liners .
  • the liner includes an additional layer which in use lies between the inner surface of the pipeline and the liner.
  • This layer can be provided as a sheath or sleeve of closed cells so as to cause the same to have the ability to seal any gaps between the liner and the pipeline inner surface and thereby prevent the ingress of fluid between the liner and the pipeline.
  • the layer can also act as an insulator during expansion
  • the advancement of the heating means and propulsion means along the liner is continuous until the end of the liner is reached thereby providing a liner with no joins.
  • the differential in pressure between the first and second fluids is in the range 0.3 to 1.5 bars and the second fluid can be introduced, typically by a positive displacement pump to the rear of the propulsion means.
  • lengths of the liner at the leading end and the trailing end are expanded using conventional means to a sufficient length to form launch and exit chambers to allow the heating means and propulsion means to be introduced initially into the launch chamber formed at one end prior to movement along the liner and at completion of the lining expansion, to lie in the exit chamber to allow the heating means and propulsion means to be removed.
  • the tubular members and hence liner when introduced into the pipeline have a diameter in the range of 15- 35% less than the diameter of the pipeline to be lined.
  • Figure 1 illustrates a pipeline to be lined in cross section along its length
  • Figure 2 illustrates a liner in cross section along its length in accordance with one embodiment of the invention being introduced along the said pipeline;
  • FIG 3 illustrates an embodiment of the apparatus for the expansion of the liner of Figure 2 in position to line the pipeline in accordance with the invention.
  • Figure 4 illustrates a detailed sectional view along a-a of one embodiment of a heat source in accordance with the invention.
  • a pipeline 2 under the surface 4.
  • the pipeline can, for example, carry water or other fluids or may be a sewer pipe and may be of metres or kilometres in length.
  • the pipeline has a series of leaks 6 which are required to be sealed and a first access point 8 and second access point 10 downstream thereof, via manholes 12 to the surface 4 are provided.
  • the purpose of the invention is to line the pipeline to seal off the leaks and effectively form a new pipeline within the existing pipeline.
  • Figures 2 and 3 illustrate how this is achieved in accordance with the invention.
  • the liner is formed of a series of tubular members 16, 16' joined end to end, typically via tapered screw thread engagements or other joining methods may be used such as by forming male and female engagement means to allow one end to be received in an end of the next member and then adhered in position with no or minimum protrusions formed at the join.
  • the tubular members are preferably formed of PVC U or PVC modified with CPE and has carbon black added to improve the subsequent heating of the same.
  • the diameter of the tubular members and hence liner when introduced into the pipeline is approximately 25% less than the diameter of the inner wall of the pipeline.
  • the liner can be heated above surface 4 in heating means which can be an infrared heated chamber 14. This ensures that the liner is sufficiently flexible to allow the same to be introduced into the pipeline and pass around any bends 18 as it does so, typically by utilising a shoe (not shown) at the access point.
  • a launch chamber and exit chamber are formed at the opposing ends of the liner by radially expanding the liner using conventional techniques, at both ends, for a length of say 2 metres. This allows the heating means and propulsion means to be positioned into the launch chamber prior to use and the exit chamber subsequent to use.
  • the heating means comprise first and second spaced heat sources with light heating media such as infrared heaters 17, 18, and the heating means and propulsion means are initially positioned at the launch chamber within the liner.
  • the first and second fluids are introduced in front of and to the rear of the propulsion means respectively and the heating means and propulsion means are then moved along the liner under the influence of the pressure differential of the two fluids, to heat, soften and expand and retain the walls of the liner.
  • the heating means are followed by the propulsion means 20 which provides the propulsion force on the heating means .
  • the first fluid air 22, in advance of the propulsion means expands the heated liner at portion 16A and the propulsion means 20 maintains the expanded softened liner 16A against the inner surface of the pipeline 2 as illustrated by arrow 23 and the cooling effect of the second fluid cools down the liner to allow the same to be retained in the expanded, lining position.
  • the movement of the propulsion means 20 along the interior of the liner is achieved by the second fluid 26 such as water, introduced via one of the water pumps 37, at a pressure which is greater than the pressure of the first fluid 22 in front of the propulsion means thereby pushing the propulsion means 20 and heat sources 17, 18 along the pipeline.
  • the first fluid is used to inflate and expand the heated liner 16 towards the pipeline inner surface prior to the propulsion means reaching that point.
  • the power supply cable 31 for the heat sources is provided up stream and carried inside a water hose 35.
  • two pumps 37 are provided, one of which pumps water at about 3 bar pressure to the hose 35.
  • the hose and cable are fed through the propulsion means 20 via a gland and then along rods 25, 27 and through the middle of the heat sources 17, 18. Power is taken off when the heat sources are reached to operate them.
  • FIG. 4 which is a cross sectional view along line a-a of heater 17 shows the passage 41 of a double skinned glass tube 43 and in the housing area between said tube 43 and water tube 35 are provided the infrared heaters (not shown for ease of reference) .
  • the water, when returned via exit 39 is a location away from the leading face 33 of the propulsion means so as not to affect the heat of the cooling water 26 at the leading face of the propulsion means .
  • Figure 3 also shows the propulsion means 20 as having a leading face 33 in a cup shape with the leading face 33 convex in shape so as to aid the movement through the tubular member liner 16 and retain the expansion of the same as indicated by arrows 23 onto the inner surface of pipeline 2.
  • the provision of ribs 47 act to maintain the tubular member in the expanded position and also the resilience of the ribs takes into account possible fluctuations of the inner surface of the inner surface of the pipeline 2.
  • the ribs have the further benefit of maintaining a fluid tight seal between the first and second fluids and thereby allow the differential in fluid pressures on either side of the propulsion means 20 to be maintained and thereby allow the movement of the propulsion means due to the differential in pressure to be maintained.
  • the second fluid is preferably relatively cool so as to provide a cooling effect on the liner once the bladder has expanded the same against the pipeline. This cooling effect prevents the liner from being flexible and thereby the liner becomes rigid against the interior of the pipeline to line the same as required.
  • the heat sources 17, 18 in the pipeline are operated at any given location for a first period of heating, and then switched off for a period of time before being switched on again to give a further heating effect.
  • This is found to provide an even heating throughout the walls of the tubular member which is uniform and therefore gives a more determinable expansion of the tubular member.
  • the PVC or CPE modification of the tubular member, and the use of the existing pipe is effectively as a former of the tubular member, which ensures that the tubular member expansion can be effectively controlled.
  • the controlled heating and expansion allows the molecules in the walls of the tubular member to be reoriented in the hoop direction which is found to increase, and in some instances double, the hoop strength and much improved impact strength of the tubular members and hence the liner formed. This orientation is effectively "set” or maintained by the rapid cooling of the expanded tubular member to thereby retain the molecules in the newly maintained configuration.
  • the cooling is achieved by the fluid to the rear of the expanding member which fluid, as it is introduced at pressure contacts with the tubular member walls to cool the same and retain the molecules in the new orientation.
  • Axial thermal contraction is relieved by drawing material axially from unexpanded heated liner material in advance of the pipeline means .
  • PVC tubular member was used which can be modified with CPE, acrylics, and carbon black.
  • the tubular member is 25% smaller than the pipeline being lined.
  • the heating means in the liner comprise shortwave infrared lamps, one 1 metre long, the other V2 metre long with a space between the two of about 2 / 3 of a metre connected by rods to the propulsion means.
  • a 150mm diameter pipe was lined using a tubular member with a diameter of 110mm and 7mm wall thickness and the lining was pressurised with the first fluid in the form of air to 1.5 bars.
  • a power supply of 4W/mm was switched on to the first heat source of the heating means and after 45 seconds the temperature of the wall of the tubular member was 120C on the inner surface and 50C on the outer surface.
  • the power supply was switched off to avoid over heating the inner wall for a period of 45 seconds whereafter the temperature on the inner wall was 90C and on the outer wall 7OC.
  • the gap between the first and second heat sources allows time for the heat effect to migrate through the walls of the liner to expand the same.
  • the infrared heat is attracted to the carbon black in the liner.
  • Behind the infrared lamp was a propulsion means that was a fairly tight fit in the pipeline. This is formed with stiff PTFE or similar backward facing ribs two or three rows round the circumference on the edges that collapse if the host pipeline is a bit smaller and expand as the pipe liner gets bigger hence allowing for changes in diameter of the host pipeline of say 50mm.
  • Behind this propulsion means is a water pressure of 2 bars fed by a positive displacement pump.
  • the water and propulsion/cooling means pushed the heating means forward which are connected to the propulsion means by a rod.
  • the propulsion means with the pressurised water behind it is doing two things in that it moves the heating means forward at a controlled speed, and also allows access to the cooling fluid behind the same to the expanded liner quickly thereby eliminating stresses in the liner and preventing the possibility of the same cracking or splitting and maintaining the realigned molecules of the liner material in position
  • the present invention therefore provides an effective and efficient method of lining an existing pipeline by using the expansion of a liner formed from one or more tubular members which are rendered to a sufficiently heated condition to allow the same to be expanded onto the inner surface of the existing pipeline.

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

Abstract

La présente invention concerne un procédé et un appareil perfectionnés destinés au revêtement d’une canalisation en vue de la restaurer ou de la réparer. L’appareil comprend une première et une seconde source de chaleur ainsi que des moyens de propulsion qui se déplacent le long du revêtement afin de le chauffer et de l’étirer, puis maintiennent le revêtement en place. L’expansion et le refroidissement sont obtenus conjointement avec l’introduction sélective de premiers et seconds fluides et le mouvement est provoqué par l’apparition d’une différence entre la première et la seconde pression de fluide des deux côtés des moyens de propulsion.
PCT/GB2006/004683 2005-12-14 2006-12-14 Application et procede destines au revetement de canalisations Ceased WO2007068932A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0525505.4 2005-12-14
GB0525505A GB0525505D0 (en) 2005-12-14 2005-12-14 Sewer & water pipe lining

Publications (1)

Publication Number Publication Date
WO2007068932A1 true WO2007068932A1 (fr) 2007-06-21

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PCT/GB2006/004683 Ceased WO2007068932A1 (fr) 2005-12-14 2006-12-14 Application et procede destines au revetement de canalisations

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WO (1) WO2007068932A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011045567A1 (fr) * 2009-10-13 2011-04-21 Pioneer Lining Technology Limited Conduites revêtues pourvues d'une isolation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562706A2 (fr) * 1992-02-27 1993-09-29 British Gas plc Méthode de revêtement interne d'un tuyau
JPH0752247A (ja) * 1993-08-13 1995-02-28 Furukawa Electric Co Ltd:The 既設管内面の内張り工法
WO1995025002A1 (fr) * 1994-03-16 1995-09-21 Insituform Technologies Ltd Ameliorations apportees au garnissage de canalisations et de passages
WO1996018493A1 (fr) * 1994-12-17 1996-06-20 John Wood Remise en forme d'elements thermoplastiques
WO1998026919A1 (fr) * 1996-12-16 1998-06-25 Severn Trent Water Limited Produits composites thermoplastiques et procede de revetement d'une tuyauterie
DE19900229A1 (de) * 1999-01-07 2000-07-27 Rico Mikroelektronik Gmbh Verfahren und Vorrichtung zum Auskleiden von Kanälen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562706A2 (fr) * 1992-02-27 1993-09-29 British Gas plc Méthode de revêtement interne d'un tuyau
JPH0752247A (ja) * 1993-08-13 1995-02-28 Furukawa Electric Co Ltd:The 既設管内面の内張り工法
WO1995025002A1 (fr) * 1994-03-16 1995-09-21 Insituform Technologies Ltd Ameliorations apportees au garnissage de canalisations et de passages
WO1996018493A1 (fr) * 1994-12-17 1996-06-20 John Wood Remise en forme d'elements thermoplastiques
WO1998026919A1 (fr) * 1996-12-16 1998-06-25 Severn Trent Water Limited Produits composites thermoplastiques et procede de revetement d'une tuyauterie
DE19900229A1 (de) * 1999-01-07 2000-07-27 Rico Mikroelektronik Gmbh Verfahren und Vorrichtung zum Auskleiden von Kanälen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011045567A1 (fr) * 2009-10-13 2011-04-21 Pioneer Lining Technology Limited Conduites revêtues pourvues d'une isolation

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