EP0832390A1 - Ameliorations concernant le revetement des canalisations et passages - Google Patents

Ameliorations concernant le revetement des canalisations et passages

Info

Publication number
EP0832390A1
EP0832390A1 EP96914291A EP96914291A EP0832390A1 EP 0832390 A1 EP0832390 A1 EP 0832390A1 EP 96914291 A EP96914291 A EP 96914291A EP 96914291 A EP96914291 A EP 96914291A EP 0832390 A1 EP0832390 A1 EP 0832390A1
Authority
EP
European Patent Office
Prior art keywords
lining
energy
pipeline
passageway
source
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
EP96914291A
Other languages
German (de)
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.)
Sound Pipe Ltd
Original Assignee
Sound Pipe 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
Priority claimed from GBGB9511834.5A external-priority patent/GB9511834D0/en
Application filed by Sound Pipe Ltd filed Critical Sound Pipe Ltd
Publication of EP0832390A1 publication Critical patent/EP0832390A1/fr
Ceased legal-status Critical Current

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
    • F16L55/1656—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 materials for flexible liners
    • 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
    • F16L55/1651—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 everted
    • 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
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means

Definitions

  • the flexible tubular lining includes a curable synthetic resin material such as an epoxy, a polyester, or a phenolic resin and wherein the resin is caused to cure after the flexible tubular lining has been inflated by fluid pressure against the surface to be lined.
  • the fluid pressure may be applied by any suitable medium such as a gas, vapour or liquid or any combination thereof.
  • the resin cures, the initially flexible lining forms a hard rigid pipe on the pipeline or passageway surface.
  • the resulting pipe may be free standing, or when it is of relatively small thickness, it may form a coating bonded to the pipeline or passageway surface.
  • latent resin systems which are systems having a long pot life e.g. measured in terms of months rather than days, as is the case with polyester, but which latent resin systems can be activated in order to cause them to cure by the application of an appropriate activating influence.
  • the activating influence may ' comprise for example ultrasonic vibrations, or electromagnetic radiation, or light cure, the resin system being appropriately formulated to be activated by these means.
  • delayed activation resin systems in these lining methods are known and have been proposed by us for example in International Patent Application No. GB 94/01453.
  • the lining is provided with a carrier material typically a polyester felt which is impregnated with the resin, and serves to carry the resin and keep it evenly distributed throughout the circumferential length of the lining, but more recently, proposals have been made for providing that the resin is contained between a pair of films so that a fibrous felt may not be necessary, although the resin may be reinforced with fibrous filler.
  • a carrier material typically a polyester felt which is impregnated with the resin, and serves to carry the resin and keep it evenly distributed throughout the circumferential length of the lining
  • the means suggested for the curing of latent resin systems in lining has been the passage through the lining, after it has been inflated, of the activating means, but the present invention represents a considerable departure from the established methods and the aforesaid proposals and provides that a flexible lining including or comprising a curable resin system, is everted into and along a pipeline or passageway, and wherein the activating means for curing the resin is arranged in advance of the everting face of the lining as it passes along the pipeline or passageway whereby the activating effect is applied to the said everting face.
  • the activating means can be any suitable depending upon the nature of the resin matrix which is used.
  • the resin which is used can be of any formulation for example as disclosed in any of the following patent applications; International Patent Applications Nos WO 95/01861 ; WO 95/01860; UK Patent Applications Nos 940734.8; 9416906.7; 9409014.9; 9415318.6; 9421369.1; European Patent Application No, 0621883.
  • the activating means can comprise the application of heat to the everting face. This could be applied by means of hot liquid or by a hot plate type member which contacts the everting face. The temperature of the fluid or hot plate can be selected to give a fast cure initiation so that after the heat is applied, the resin will continue curing after the lining tube has been applied to the pipeline or passageway surface.
  • the activating means travels along the pipeline or passageway in advance of the everting face, and in a particularly preferred arrangement the activating means applies ultrasonic vibrations to the everting face at sufficient frequency and power to cause activation of the cure of the resin which will be specially formulated to be responsive to ultrasonic vibrations.
  • the resin may comprise a resin matrix containing absorbent particles in which catalyst and/or accelerator is absorbed, for example as described in International patent application WO 95/01861, or alternatively the resin may include microcapsules in which the catalyst and/or accelerator is contained, and in these cases either the absorbent particles are shattered or broken by means of the ultrasonic energy or the microcapsules are ruptured by the energy but in either case the catalyst is released at the everting face, and initiation of the cure will take place.
  • the cure in each section of the lining will continue after it has been applied to the pipeline or passageway surface so that eventually the lining will form a hard rigid lining pipe on the passageway surface.
  • the cure system will be such as to cause fast curing of the resin i.e. within a time period of half an hour to one hour, which should make the installation process much quicker than the conventional process in which hot water inside the lining is used to cure the lining.
  • the ultrasonic generator may be arranged to be kept slightly spaced from the everting face of the lining tube to prevent scorching of the lining tube on the everting face.
  • the resin may in another embodiment embody electromagnetic particles which can be activated by an electromagnetic field generator, which is arranged to apply an alternating magnetic field to the everting face of the lining tube in order to activate the magnetic particles to cause heating of same.
  • any combination of these resin systems and activating means can be adopted, and the invention provides particular advantage insofar as a single activating means arranged in front of the everting face can be adopted. It is not necessary that the activating means should be of a size closely matched to the inner diameter of the pipeline or passageway and in fact it can be made considerably smaller which means that it can be moved easily through the pipeline or passageway. It may be provided with a support spider or other means to keep the activating means centrally located in the pipeline or passageway as it moves therealong.
  • heat may be applied by means of a hot fluid spray or by means of a hot plate.
  • the method should provide that curing can be effectively controlled and provides the advantage that a curing activation step is only performed on the everting face immediately prior to the application of the lining tube to the pipeline or passageway surface, and therefore there is little danger of the resin in the lining curing prematurely i.e. before it is applied to the pipeline or passageway surface. After the lining is so applied it is desirable that curing should take place as quickly as possible.
  • the process can be enhanced by providing reflective means behind or to the rear of the everting face so that energy which is transmitted through the resin in the everting face may be reflected through the said resin ensuring maximised use of that energy for curing purposes.
  • the reflective means may suitably comprise a reflective film, being for example, a metallised plastic film or a metal foil which initially is to the outside of the lining tube, but everts with it as it is everted into position.
  • Fig. 1 shows a section of underground sewer to be lined through a manhole which is also shown;
  • Fig. 2 shows a view similar to Fig. 1, but showing also the basic lining operation
  • Fig. 3 is a diagrammatic view showing the lining being installed and being preceded by an ultrasonic generating device
  • Fig. 4 is a view similar to Fig. 3 but to a considerably enlarged scale for the purposes of explanation;
  • Fig. 5 is a sectional view showing how the lining cures after activation by the ultrasonic device.
  • Figs. 6, 7 and 8 are diagrammatic views of three activating arrangements.
  • Fig. 1 is show ⁇ an underground sewer 10 which is to be lined by means of a resin impregnated or filled resin matrix lining tube 12, by the feeding of same through a manhole 14 leading from ground level where the tube 12 is stored to the underground level of sewer 10.
  • a manhole 14 leading from ground level where the tube 12 is stored to the underground level of sewer 10.
  • an elbow pipe 16 through which the lining tube is fed as will be explained, the elbow pipe 16 having a top end 18 and a lower elbow end 20 the outlet for which faces into and along the sewer 10.
  • the leading end of the tube 12 is fed through the interior of the elbow pipe 16 as shown in Fig. 2, and then the said leading end is cuffed backwards so as to overlie the outlet end 20 of the elbow pipe 16 as shown in Fig. 2.
  • the said leading end is clamped by a suitable clamp means 22, and in order to perform the eversion, in this example water is filled into the elbow pipe 16 as indicated by water outlet 24 until the water reaches a level in the elbow pipe indicated by reference 26.
  • the water 28 inside the cuffed back leading end of the lining tube 12 causes the tube to be fed from ground level as indicated by arrows 30 into and along the sewer 10 so that the lining tube 12 is everted onto the surface of the sewer by the pressure of the water 28.
  • the feed of the lining tube into and along the sewer 10 may be controlled by a holding force applied to the lining tube.
  • This procedure is called “bottom inversion” as the tube 12 is connected to the bottom end of the pipe 16.
  • the tube 12 can be connected to the top end of the pipe 16, in which case the procedure is called “top inversion".
  • the lining tube 12 in this example comprises at least one layer of resin absorbent material such as a needled felt, surrounded on the outside by an impermeable film or coating keeping the water 28 out of contact with the resin.
  • resin absorbent material such as a needled felt
  • the outer coating becomes the inner j surface of the inflated lining tube.
  • the problem with this method is that the cure time is very long insofar as it can take eight to ten hours in order to cure the resin sufficiently for the water to be removed and the ends of the lining tube to be trimmed in order to complete the installation.
  • the resin used typically is polyester, and it has a relatively short pot life (up to several days if it is kept refrigerated) and therefore the known method does not lend itself to the adoption of latent resin systems on the one hand, and fast cure on the other hand.
  • an ultrasonic generator 40 moves along the sewer 10 in front of the everting face 42.
  • the generator 40 moves in the direction of arrow 44 as does the everting face 42, and as the ultrasonic generator moves it emits ultrasonic vibrations in the opposite direction i.e. directly onto the everting face in order to activate the resin in the lining tube 12.
  • the resin will be suitably formulated so that it is "kicked” into curing activity by the application of the energy of the ultrasonic vibrations. The energy applied will be sufficient to initiate the cure in the resin, but cure will continue after the lining tube 12 has been applied to the sewer surface or in other words after it has been fully everted.
  • Fig. 5 is a graphic illustration of how curing takes place, and referring to that figure, the ultrasonic generator 40 emits ultrasonic vibrations as indicated by reference 46 onto the everting face 42.
  • the cross hatching on the lining tube 12 is intended to indicate the extent of cure of the lining tube at each location. Thus, at location 48 the resin has completely cured, whereas at the centre of the everting face as indicated by reference 50 no curing has yet taken place. When the radiation falls on the everting face, cure commences and this is indicated by a relatively small thickness of cross hatching 52 at said everting face and the thickness of the cross hatching increases progressively from location 52 to location 48.
  • the distance between these two locations may represent in order of half and hour to one hours travel of the everting face, indicating that cure is effected within a period of half and hour to one hour.
  • the cross hatching is shown as increasing in thickness from the everting face location 52 to location 48, in fact the extent of cure will be homogeneous throughout the thickness of the lining and the degree of cure will be least at location 52 and greatest or fully cured at location 48.
  • Figure 4 shows in greater detail the arrangement at the everting face 42.
  • the lining material comprises a central layer 54 containing the resin and felt if provided, a first protective film layer 56 and a second protective film layer 58, the layers 56 and 58 lying to opposite sides of the resin layer 54.
  • Layer 56 is initially to the outside of the lining tube in the stored position shown in Fig. 1 , whilst layer 58 is to the inside , but after eversion the positions of the layers reverse as can be seen from Figure 4.
  • the layer 54 may not necessarily include a felt but may comprise simply a resin matrix with a filler substance such as loose fibres and other filler materials.
  • the resin however is likely to include particles either in the form of absorbent particles in which catalyst and/accelerator is absorbed, or microcapsules in which catalyst and/or accelerator is contained, and the energy from the ultrasonic generator 40 is such as to fracture or rupture these particles to allow release of the catalyst and/or accelerator in order to cause the cure initiation as explained herein.
  • the position for the ultrasonic generator 40 from the everting face 42 will be calculated to be the optimum, and at present it is believed that it is not desirable to have the face of the ultrasonic generator in contact with the everting face 42 (unless there is a film of oil on the face) so that scorching at such face 42 can be avoided.
  • a novel drive means is shown in that the ultrasonic generator 40 is carried by a frame 60 on which pulleys 62 and 64 are rotatably mounted. These pulleys press on the everting face and serve two functions namely to keep the ultrasonic generator 40 at a predetermined distance from the everting face 42, and secondly to provide a drive transmission to gear wheels 66 and 68 paired with the wheels 62 and 64. These pairs are carried by spring loaded arms 70 and 72 which are spring loaded so as to project the gear wheels 66 and 68 outwards towards the surface of the sewer 10 to engage same. As the everting face moves and eversion proceeds, so the pulleys 62 and 64 are driven in the directions indicated by the arrows.
  • Rotation of pulleys 62 and 64 causes rotation of the gear wheels 66 and 68 which in turn drive against the sewer 10 as indicated by the arrows, and cause the assembly including the ultrasonic generator 40 to move rearwards as indicated by the arrow 44 at the same speed as the everting face.
  • the wheel pairs 64 and 68 and 62 and 66 also serve as a centering means for the ultrasonic generator 40.
  • hot water may be used for the eversion process or may be used after completion of eversion, the heat in the water serving to enhance or accelerate the cure.
  • Figs. 6, 7 and 8 show various activating arrangements. Each includes an activating head 100, which in the caes of Figs. 6 and 7 comprises an energy delivering horn driven by a transducer 102 through a booster 104.
  • the horn 100 is shaped to conform to the shape of the everting face 42 as shown, whilst in Fig. 7 the horn energy delivering face 106 is flat.
  • the generators of Figs. 6 and 7 are for small diameter pipes e.g. 10 cm approx, and may be microwave or ultrasonic, whereas the arrangement of Fig. 8 comprises an ' ultrasonic apparatus for larger diameter pipes.
  • the arrangement of Fig. 8 comprises a generator 110, a vibrator plate 112 arranged in front of the everting face 42 and a plurality of generators 114 welded on the rear of plate 110 in the manner shown and connected to be driven by the generator 110.
  • Each of the arrangements operates as described herein by emitting radiation onto the everting face 42.
  • the method of the invention has wide application. Thus, it is not necessary that the lining tube should be provided with inner and outer plastic films or coatings.
  • the method can be used when the tube is as is conventional provided with only an outer film.
  • ultrasonics be used for initiating the cure. Any suitable means can be used such as lights, electromagnetic radiation, mechanical means (for rupturing particles containing catalyst and/or accelerator) or heat can be applied to the everting face. The heat may be applied in the nature of steam or hot water of sufficient temperature to ensure that the curing is commenced.
  • the effecting of the cure at the everting face can be used in conjunction with steps to effect enhancement of the cure before or after insertion of the lining tube.
  • the maximum utilization of energy can be effected by providing an energy reflective means to the rear of the everting face so that energy which passes through the everting face will be reflected back into the everting face from the rear; this provides maximum curing effect in the resin.
  • This energy reflection may be achieved in any suitable way such as by providing an energy reflective shield R (shown in dotted lines in Fig. 3) behind the everting face, but a preferred method is to provide the tube 12 itself on its outer surface (before eversion) with a reflective coating or layer, which everts with the tube 12.
  • the layer 56 may be a metallised film, or an additional film (metallised) such as film 56A (shown in dotted lines in Fig. 4) may be applied to the tube 12, the metallising in each case providing a means to reflect any energy, especially ultrasonic energy, back to into the everting face, should it pass completely through the everting face.
  • a metal foil may be used with the same effect.
  • a layer which absorbs energy and heats up as a result may also be useful on the rear of the everting face, as the heat generated therein will assist in the curing step and will continue so to do after the material has passed the everting face and lies on the pipeline surface.
  • the method of the invention has a number of considerable advantages as follows :-
  • the activation means can be pulled or driven through the pipeline or passageway ahead of the everting tube, making it easy to locate and position.
  • the energy applying device can be easily centralized, and it is required to direct the energy axially of the sewer. Therefore, the energy can be concentrated on the everting face, meaning that a small device with high energy output can be used.
  • Linings with latent resin systems can be used and they can therefore be manufactured and stored a long time before application.
  • the method can be carried out much quicker than the conventional method improving the lining efficiency.
  • Lining tubes which do not embody any felt can be used readily in the process.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne la pose dans une canalisation ou un passage (10), d'un revêtement tubulaire (12) d'un type qui comprend ou inclut une résine synthétique durcissante. Le revêtement, en accord avec des méthodes connues, est retourné à l'intérieur de la canalisation ou du passage et est disposé le long de ceux-ci. Néanmoins, en ce qui concerne le durcissement du revêtement pour en faire un revêtement ayant la forme d'un tuyau dur sur la surface du pipeline ou du passage conducteur, de l'énergie est appliquée sur la face extérieure de la surface retournée du revêtement. En pratique, une source d'énergie ultrasonique (40) voyage au devant de la surface de retournement (42) le long de la canalisation ou du passage et l'énergie concentrée émanant de la source est dirigée sur la surface retournée, en particulier au centre de celle-ci, ce qui a pour effect que l'énergie administrée sur ce côté fait démarrer le processus de durcissement, mais la résine ne durcit dans aucune des sections du revêtement tant que la section n'a pas été retournée et qu'elle n'est pas disposée sur la surface de la canalisation ou du passage. Un dispositif est mis en ÷uvre pour assurer que la source d'énergie reste éloignée de la surface retournée d'une distance minimale prédéfinie.
EP96914291A 1995-06-10 1996-05-17 Ameliorations concernant le revetement des canalisations et passages Ceased EP0832390A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US509648 1983-06-30
GB9511834 1995-06-10
GBGB9511834.5A GB9511834D0 (en) 1995-06-10 1995-06-10 Improvements relating to the lining of pipelines and passageways
US08/509,648 US5634743A (en) 1995-06-10 1995-07-31 Lining of pipelines and passageways
PCT/GB1996/001176 WO1996041986A1 (fr) 1995-06-10 1996-05-17 Ameliorations concernant le revetement des canalisations et passages

Publications (1)

Publication Number Publication Date
EP0832390A1 true EP0832390A1 (fr) 1998-04-01

Family

ID=26307199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96914291A Ceased EP0832390A1 (fr) 1995-06-10 1996-05-17 Ameliorations concernant le revetement des canalisations et passages

Country Status (3)

Country Link
EP (1) EP0832390A1 (fr)
AU (1) AU5770096A (fr)
WO (1) WO1996041986A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7342198A (en) * 1997-05-15 1998-12-08 Sound Pipe Ltd Improvements relating to curing of synthetic resin systems, for example, in the lining of pipelines and passageways
GB2626347A (en) * 2023-01-19 2024-07-24 British Telecomm Apparatus, system and method for use with utility tunnels
KR102669297B1 (ko) * 2023-11-08 2024-05-24 덕산건설 주식회사 비굴착 관로 보수용 펠트의 정속 반전 부착 시스템 및 이를 이용한 부착 방법
KR102669298B1 (ko) * 2023-11-08 2024-05-24 덕산건설 주식회사 비굴착 관로 보수용 펠트의 정속 반전 주행 장치 및 이를 이용한 주행 방법

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1563424A (en) * 1974-01-25 1980-03-26 Insituform Ltd Lining of passageways
US4401696A (en) * 1981-09-30 1983-08-30 Insituform International, Inc. Lining of pipelines and passageways
US4456401A (en) * 1981-11-09 1984-06-26 Finic, B.V. Method and apparatus for relining underground passageway
GB8400233D0 (en) * 1984-01-05 1984-02-08 Edgealpha Ltd Lining pipelines and passageways
DE3801468A1 (de) * 1988-01-20 1989-08-03 Hans Mueller Verfahren zum sanieren einer im erdreich verlegten rohrleitung, vorzugsweise eines abwasserkanals

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9641986A1 *

Also Published As

Publication number Publication date
AU5770096A (en) 1997-01-09
WO1996041986A1 (fr) 1996-12-27

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