WO1995008075A1 - Ameliorations concernant le garnissage de conduites ou passages - Google Patents

Ameliorations concernant le garnissage de conduites ou passages Download PDF

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Publication number
WO1995008075A1
WO1995008075A1 PCT/GB1994/000598 GB9400598W WO9508075A1 WO 1995008075 A1 WO1995008075 A1 WO 1995008075A1 GB 9400598 W GB9400598 W GB 9400598W WO 9508075 A1 WO9508075 A1 WO 9508075A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
lining
sewage
lining tube
inflation
Prior art date
Application number
PCT/GB1994/000598
Other languages
English (en)
Inventor
Eric Wood
Original Assignee
Ina Acquisition Corp.
Insituform (Netherlands) B.V.
Insituform Licensees B.V./S.A.
BULL, Miranda, Jane
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 GB939319017A external-priority patent/GB9319017D0/en
Priority claimed from GB9400030A external-priority patent/GB9400030D0/en
Application filed by Ina Acquisition Corp., Insituform (Netherlands) B.V., Insituform Licensees B.V./S.A., BULL, Miranda, Jane filed Critical Ina Acquisition Corp.
Priority to AU62631/94A priority Critical patent/AU6263194A/en
Publication of WO1995008075A1 publication Critical patent/WO1995008075A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/06—Methods of, or installations for, laying sewer pipes
    • 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
    • F16L55/18—Appliances for use in repairing pipes
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/06—Methods of, or installations for, laying sewer pipes
    • E03F2003/065—Refurbishing of sewer pipes, e.g. by coating, lining

Definitions

  • a soft lining comprises a flexible tube which is intended to line the surface of a pipeline or passageway, such as an underground sewer.
  • the lining tube is tailored to the size of the pipeline or passageway, and is inserted when flexible and pliable so that it can be inserted when folded to flat condition and can be pulled into the pipeline or passageway or can be everted into the pipeline or passageway. Additionally, the tube can be taken into the pipeline or passageway on a transporting means such as a trolley when it is in for example a concertina folded arrangement, and then pulled out to length and inflated.
  • the tube is constructed so as to have a layer or layers of a material which can be impregnated with a synthetic resin, and the tube furthermore is provided with an outer impermeable film or coating and sometimes inner and outer films or coatings so that it can be inflated using fluent medium so as to urge the tube to the pipeline or passageway surface to line same.
  • the resin impregnatable layers are in fact impregnated with a curable synthetic resin, which is in the uncured condition until the tube is applied to the pipeline or passageway surface as described, and when it is so held in this position, curing of the uncured resin is caused or effected, so that the resin with the impregnatable layers therein cures to a hard condition whereby there is formed in effect a pipe within a pipe of tubular lining forming the inner pipe which is rigid and unless the tube is extremely thin, will be free-standing.
  • a curable synthetic resin which is in the uncured condition until the tube is applied to the pipeline or passageway surface as described, and when it is so held in this position, curing of the uncured resin is caused or effected, so that the resin with the impregnatable layers therein cures to a hard condition whereby there is formed in effect a pipe within a pipe of tubular lining forming the inner pipe which is rigid and unless the tube is extremely thin, will be free-standing.
  • the resin selected may be such as to provide a bond between the lining and the passageway surface, but it is not essential that this be done, especially in applications such as the lining of sewer pipelines where bonding to the pipeline surface is not important.
  • the by-pass pumping of sewage involves substantial time and planning in carrying out the Insituform process, and if it could be eliminated, then the process could be performed more quickly and at less cost.
  • the present invention is concerned with a means for performing a soft lining process wherein the by-pass pumping of the sewage is eliminated.
  • a method of soft lining a sewer pipe without requiring the by-pass pumping of the sewage while the lining operation takes place comprises either everting the lining tube into the pipe to cause it to lie against a pipe surface or placing an uninflated resin impregnated lining in the sewer pipe and inflating same onto the sewer pipe surface by everting into the lining tube an inflation tube, and in either case using the normally flowing sewage to perform the eversion.
  • the pipe preferably is a sewer and the fluent material is sewage.
  • the flow of sewage through the sewer pipe is diverted to a header tank, and from the header tank the sewage is caused to flow into either an everted end of the lining tube or an end of the lining tube over which an end of the inflation tube is positioned, so that the sewage will evert either the lining tube or into the pipe or the inflation tube into the lining tube.
  • the lining tube remote from said header tank there may be a further header tank into which the said remote end of the lining tube opens or can be made to open, so that the sewage will be caused to flow through the lining tube, inflating same onto the pipeline or passageway surface with the inflation tube when provided lying between the sewage and the lining tube.
  • the resin used is preferably of the ambient cure type and will cure with time, and to this end preferably is formulated with accelerator and/or catalyst to give such rapid ambient cure. If the resin needs to be coated acted upon in order to effect the cure of the resin a particle source may be passed through the sewage, radiating energy or particles from the source to fall on or bombard the lining tube and the resin therein in order to effect the curing of same.
  • the resin may be provided with an accelerator or catalyst responsive to the radiation if a particularly fast cure is required, but it has been found that the usual resin which is used for soft linings namely a polyester based resin can in fact be cured without special modification by the use of a gamma particle radiation source.
  • a gamma radiation source for the curing of the resin in soft linings when the lining is inflated by a turbid liquid such as sewage in itself constitutes a separate invention, and the applicant reserves the right to claim such invention.
  • header tanks can be effected so that there are header tanks at each manhole in a sewer pipeline, the lining tubes being inserted into lining position between respective manholes.
  • the lining tube When the lining tube is everted using the normally flowing medium the lining tube is preferably only impregnated along that length which will line the pipe and has head and tail portions which extend from the header tanks and are removed after the lining operation has been completed.
  • the sewage can flow through the respective sections of the sewer pipe with the flexible linings therein by syphonic effect.
  • a separate pump located in the sewer pipe is required, such pump being arranged to pump the sewage into the lining tube on the inflation tube.
  • the inflation tube when used preferably everts along the inside of the lining tube and emerges into the header tank at the next manhole. Where it emerges it is anchored for example by a wedging arrangement or by an inflatable collar and then is cut to allow the sewage therein to flow into the header tank.
  • the centre portion of the inflation tube is then pulled back to the manhole at which it was inserted (through the sewage) and the sewage can then overflow into the header tank at the said next manhole where it can be used for the eversion of th next inflation tube into the next lining tube, and the process can be repeated so that the sewage can flow through, and inflate a number of lining tubes simultaneously and this condition can be maintained until the lining tubes cure.
  • the everting inflation tube preferably everts through an inlet sleeve in the bottom of the header tank.
  • the sleeve may be of tapered form, and if it is the inflation tube may be wedged to the sleeve by driving a complimentary sleeve into the inlet sleeve. A portion of the inflation tube is then allowed to evert into the complimentary sleeve and project upwardly therefrom, which projecting portion is subsequently cut away, allowing the sewage to flow into the header tank.
  • an inflatable collar is provided between the sleeves so that the inflation tube can be trapped to the sleeves by inflation of said collar.
  • the sleeves need not be tapered.
  • Fig. 1 is a sectional elevation of an underground sewer in the region of a manhole, and illustrating the basic steps of the lining operation according to one embodiment of the invention
  • Fig. IA is an enlarged sectional elevation of a portion of the lining tube illustrated in Fig. 1;
  • Fig. 2 is a view similar to Fig. 1 but showing the lining operation at a later stage;
  • Fig. 3 is a view similar to Fig. 1 showing the lining operation at a still further stage;
  • Fig. 4 is a sectional elevation of the sewer between a pair of adjacent manholes showing how the method can be used in a series arrangement
  • Fig. 5 is a view similar to Fig. 4, but showing a method wherein heat curing of the resin of the lining tube is utilised;
  • Fig. 6 is a sectional elevation taken on the line A - A in Fig. 5 ;
  • Fig. 7 is a sectional elevation taken on the line B - B in Fig. 5;
  • Fig. 8 is a sectional elevation taken on the line C - C in Fig. 5;
  • Fig. 9 is a perspective elevation showing a flood tank used in the method of Fig. 1;
  • Figs. 10, 11 and 12 are views equivalent to Figs. 1, 2 and 3, but showing an alternative method wherein the sewage is pumped through the lining tube;
  • Fig. 13 is a perspective view corresponding to Fig. 4 to illustrate the utilisation of particle radiation curing source
  • Fig. 14 is a sectional perspective elevation of the particle radiation curing source shown in Fig. 13;
  • Fig. 15 is a sectional elevation showing a lining operation involving the lining of an underground pipeline or passageway;
  • Fig. 16 is a perspective view of one of the header tanks shown in Fig. 15;
  • Fig. 17 is a sectional view of the header tank shown in Fig. 16;
  • Fig. 18 is a sectional view of the header tank arrangement which is ringed in Fig. 15;
  • Fig. 19 is a view similar to Fig. 15, but showing a later stage of the operation;
  • Figs. 20, 21, 22 and 23 show in a sequence the method of attaching the inflation hose or tube to a header tank.
  • Fig. 1 the sewer pipeline section to be lined according to the method is indicated by reference 10, the sewer being located underground.
  • the ground level is indicated by reference 12.
  • Access to the sewer 12 is via a manhole 14 and it is intended that the method to be described is for the purposes of lining the section of sewer 10 between the manhole 14 and the next adjacent manhole located leftwards of manhole 14 in Fig. 1.
  • the manhole 14 is enlarged as shown at 16, and located in the enlarged portion is a flood tank 18.
  • a locking device 20 is shown in the sewer pipe upstream of manhole 14, this locking device comprising in this instance an inflatable collar 22 to the downstream end of which is connected a tubular skirt 24.
  • the lining operation of the pipe section 10 takes place whilst the flow of sewage 26 through the sewer is maintained.
  • the extension skirt 24 is pulled up through an aperture 32 in the flood tank 18 so that in fact the sewage 26 will first of all build up in depth and then flow through the aperture 32 into the flood tank 18.
  • An adjacent aperture 34 in the flood tank 18 provides a means through which the sewage flowing into the tank can exit therefrom.
  • a lining tube 36 is pulled into the pipe section 10 by means of a winch and cable, the cable being illustrated by reference 38 and connected to the leading end 40 of the lining tube 36.
  • the lining tube 36 extends to ground level 12, and may in fact be passed through a processing apparatus 42 which serves to impregnate the absorbent layer or layers of the tube 36 with synthetic resin.
  • Fig. IA which shows the tube 36 in enlarged cross-section.
  • the inner layer or layers 44 may be suitably of absorbent felt such as a polyester film, whilst the outer layer 46 is an impermeable layer and may be a coating of polyurethane film.
  • the impregnation of the tube 36 can be effected rather than on site, in factory conditions if required. Furthermore, it is preferred that a leading portion of the tube 36 and a trailing portion of the tube 36 should not be impregnated for reasons which will be clear from the following.
  • the lining tube 36 which is open at the trailing end is positioned in the pipe section 10 to be lined to the required extent before the sewage is allowed to build up and flow into the flood tank 18, and Fig. 2 shows the position in which the lining tube 36 has been so positioned, and its trailing end 48 has been connected to the flood tank in the region of the aperture 34. Also connected to the periphery of the aperture 34 is a flexible inflation tube 50. As can be understood clearly from Fig. 2, when the sewage 26 floods into the tank 18, it will endeavour to escape through aperture 34 and in fact does so, but in so doing it everts and inflates the tube 50 into the lining tube 36 so that in fact the sewage starts to flow into the lining tube as shown clearly in Fig. 3.
  • the inflation tube 50 is of such material and such length so that the inflation of the tube 50 and hence the inflation of the tube 36 can be effectively controlled as inflation proceeds.
  • the tube 36 is shown as being open and containing an air space in front of the everting face of tube 50, in fact it will be closed and air will be excluded.
  • the inflation tube 50 may be open at the trailing end although it can be closed in the manner to be described in relation to other embodiments set forth herein so that the sewage can as shown in Fig.
  • leading and trailing ends of the lining tubes 36 and 36A have to serve to control the flow of the sewage into and out of the lining tubes 36, 36A, and as they are trimmed after the resin has been cured, in any of the manners hereinafter explained, it is preferable that the leading and trailing sections should in fact be free of impregnating resin. These sections may in fact be of different material from the body of the lining tube 36 for this purpose.
  • the lining tubes 36, 36A and so on become hard rigid lining pipes lying on the inner surfaces of the sewer pipe sections 10, 10A and so on.
  • the advantage of the general method described is that the sewage forms the medium which inflates and everts the inflation tube 50 which in turn inflates the lining tubes 36, 36A progressively onto the sewer pipe.
  • the lining 36 When the lining 36 is placed in position lining the sewer pipe, it is normal to provide some means of initiating and effecting the cure of the resin in order to accelerate the completion of the lining operation.
  • a polyester resin When for example a polyester resin is used, although such resin will with the passage of time be self curing, the time required for self curing is prohibitively long, and therefore some means of initiating the cure is provided.
  • the means for initiating the cure of the resin comprises as shown in dotted lines, a particle radiation source 52, which is pulled through the sewage 26 by means of suitable winches and ropes, the ropes only being shown at reference 54.
  • the radiation source preferably is a gamma radiation source, and the particles thereof bombard the uncured resin in the lining 36 which initates the cure of the resin.
  • a modified form of inflation tube and the modified arrangement has to be used, and a heat curing arrangement is shown in Figs. 5 to 8.
  • FIG. 5 In the arrangement shown in Fig. 5, three sewer pipe sections 60, 62 and 64 are in the process of being lined, the linings having been applied or being applied in the manner described in relation to Figs. 1 to 3.
  • Flood tanks similar to tanks 18 and 18A are shown at 66 and 68 at the level of the ground 12, and the lining tube lining section 62, which is indicated by reference 70 contains an inflation tube of a construction shown in Fig. 6.
  • the inflation tube indicated generally by reference 72 comprises a flexible tube portion 74, to the exterior of which is connected a film portion 76 forming a cavity 78 in which is located a hose 80 by which hot water may be circulated as described.
  • the inflation tube 72 is inserted into the lining tube as described in relation to Figs. 1 to 3 by everting the tubular portion 74 so that the film and membrane 76 lies inside the everted tubular portion 72, as shown in Figs. 7 and 8.
  • the cavity 78 as shown in Fig. 7 is filled with hot water from a boiler in a boiler truck 81 at ground level, the water being supplied through the hose 80. Each end of cavity 78 is closed by closing the membrane 76 to the respective outlet and inlet connections of the flood tank 66 and 68.
  • the sewage is allowed to flow through the everted tube 72 as indicated by the arrows 82 and through the space 84 as shown in Fig. 7 between the membrane 76 and the inflation tube 72.
  • the sewage is therefore used for initially everting the inflation tube, and then hot water is passed into the inside of the membrane 76 whilst the sewage continues to flow through the space 84. This hot water effects curing of the lining only over an arc indicated by reference 86 in Fig. 7.
  • the membrane 76 is connected so as to seal off the space 84, so that hot water can be inserted into such space by means of the circulation hose 88, as shown in Fig. 7, and the sewage in this alternative arrangement passes through the space 78 so that sewage flow is maintained.
  • FIG. 9 illustrates diagrammatically a suitable form of flood tank 18 with its inlet 32 and its outlet 34.
  • Inlet 32 and outlet 34 each comprise a short length of pipe projecting above the floor 90 of the tank 80.
  • the tank has side walls 92, 94, 96 and 98 as shown, and the walls 96 and 98 have apertures 100 which are normally closed by means of a sluice valve plate 102 which can be raised and lowered for example by means of the manually operated winch 104, in order to allow the sewage to flow through the apertures 100 and back into the sewer. This may be required when for example it is necessary to clean or service the interior of the tank 18.
  • the sewer pipe 110 to be lined by means of a lining tube 112 of the construction already described is provided with a valve structure 114 comprising a cylinder with an inflatable jacket 116 therein.
  • the inflation tube 118 passes through the inflatable jacket 116 as shown, and a pipe 120 also passes through the structure 114 so that an inlet end thereof 122 lies between a trailing end portion 124 of the lining tube 112, which is connected to the structure 114 and the inflation tube 118.
  • the inflation jacket 116 is as will be appreciated required to be inflated to form a valve so that the sewage cannot flow back through the structure 114.
  • valve structure 124 which is of a similar construction to valve structure 114, but is smaller so that it can pass through structure 114 with the tail end of the inflation tube 118.
  • the arrangement shown in Fig. 12 is the situation which exists when the tail end of the inflation tube 118 has reached its extreme left position and eversion has been completed.
  • the structure 124 has an inflatable sealing jacket 126 to form a seal preventing the passage of sewage through the structure 124, to such an extent to enable the sewage to keep flowing and to keep the lining tube inflated.
  • the lining has been completely inflated onto the sewer surface.
  • particle source such as source 52 is pulled through the inflated lining tube to effect cure of the resin.
  • the inflation tube may be a tube of flexible reinforced material of the same or different construction from the material of the lining tube.
  • the inflation tube may also be impregnated with the same synthetic resin, so that the lining tube and inflation tube in the curing of the resin become integrated.
  • the resin which impregnates the inflation tube may contain a catalyst or initiator for the resin impregnating the lining tube so that initiation and acceleration of the cure can take place without using particle radiation source or heat as herein described.
  • the syphonic type arrangement as shown in Fig. 4 can be used for any size of sewer pipe provided that there is sufficient sewage flow.
  • the advantage of the arrangement is that it is intrinsically safe, and can be left for a long period without special attention.
  • Any suitable resin accelerator and cure system can be used as required.
  • sewage pipe 10 has been lined as described, and the lining is to be cured by means of the particle radiation source 52, and this is being done by the winching of the source 52 by means of the winch ropes 54, which are in fact high strength air hoses wound round winch drums 140 and 142 in vehicles 144, 146 at ground level.
  • the vehicles have air operated winches 148 and 150 so that the source 52 can be pulled through the lining in pipe 10.
  • the air hoses 54 also serve as a means for supplying compressed air from the vehicles 140, 146 to displace relative halves of a screening sleeve of particle containment material such as lead contained in the assembly comprising the indicated source 52, and described in more detail in relation to Fig. 14.
  • the arrangement is that when compressed air is supplied to the assembly 52, the portions of the said sleeve are displaced allowing particles from the radiation source to be omitted radially onto the lining for effecting the cure, but should the compressed air fail, then automatically the sleeves close on the said source preventing the omission of the gamma particles.
  • the assembly 52 will when in transit be located in a radiation containing medium such as lead or the like .
  • the assembly 52 is shown in Fig. 14, and will be seen to comprise a spherical casing 152 which may be made up in two halves which are screwed or otherwise secured together.
  • the casing may be made of alluminiun or fibre glass or other material which is transparent to the particle radiation which can be omitted from the source inside the assembly.
  • the source as shown comprises an annular ring 154 of gamma radiating material, and normally enclosing that source is a sleeve housing made up of two sleeve halves 156 and 158 which are spring loaded together by means of a compression spring 160, so that the halves 156, 158 are sprung to the closed position containing the source and preventing the omission of gamma particles beyond the sleeve casing.
  • the sleeve casing can be opened by supplying air under pressure through pipe 54 to inlet connection 160 having are passages 162, 164 leading to cylinders 166 in which the inner walls of the sleeve halves 156, 158 slidably engage and form pistons therein.
  • the halves 156 and 158 are displaced axially apart so as to expose the source as shown in the bottom half of Fig. 14, and the gamma particles can radiate from the source 154 through the annular gap created by displacing the sleeve halves 156, 158 to the open position.
  • the impingement of the gamma particles on the uncured resin effects curing of same rapidly. The curing can be made even more rapid if a special initiator or catalyst responsive to the gamma radiation is contained in the uncured resin.
  • a particle radiation source provides the advantage that radiation can take place through turbid liquids such as sewage, and therefore the radiation source can be used when sewage is the material which is used for inflating the lining tube.
  • the utilisation of the gamma or other particle radiation is effective in not only the methods described herein, but also the existing soft lining methods.
  • FIG. 15 illustrates an underground sewer pipe 10X in which sewage is flowing in the direction of the arrow 12X, and in relation to which it is desired to apply soft linings to the sewer pipe lengths between manholes, such as manholes 14X and 16X.
  • manholes 14X and 16X there may be a number of the said manholes 14X and 16X and the sewer pipe 10X extending between respective manholes may require to be lined.
  • the pipe to be lined is indicated by reference 18X, and as shown in Fig. 15 adjacent manhole 14X is an installation vehicle 2OX which is provided with a power winch 24X on the rear decking thereof. From the winch 24X is fed an inflation tube 26X of flexible plastics material which may be reinforced if required. That tube is used to inflate a lining tube which has previously been placed in the pipe 18X.
  • the lining tube in fact is shown by reference numeral 28X and it is in position in pipe 18X extending between the manholes 14X and 16X.
  • the lining tube 28X is of an absorbent material (as described herein) which is impregnated with a curable synthetic resin of a type preferably which will cure under ambient conditions.
  • the resin may be designed to cure for example in four hours at standard temperature and pressure.
  • the lining tube 28X When the lining tube 28X is in position as shown, it may be kept cool by the flowing sewage which flows over the tube, but at its ends the tube 28X is provided with extension sleeves 3OX and 32X which extend upwardly in the respective manholes 14X and 16X to ground level.
  • Figure 15 also shows that a second liner tube 34X of the same composition as tube 28X is positioned in a downstream pipe 36X of the sewer 10X, and again a flexible sleeve 38X connected to the end of the liner tube 34X extends to ground level.
  • a low head high volume pump 4OX the purpose of which is to pump the flowing sewage up through a discharge conduit 42X which leads upwardly to ground level.
  • the conduit 42X and the flexible sleeve 3OX are connected to respective outlets and inlets of a header tank 44X the purpose of which is to receive pumped sewage through the conduit 42X, and to allow the pumped sewage to flow down through the sleeve 3OX and through the liner 28X and eventually up through sleeve 32X to the next and similar header tank 46X at the manhole 16X.
  • the header tank 44X is shown in Fig. 18, and it will be seen that the conduit 42X is connected to an inlet sleeve 48X in the base of the tank 44X, whilst the sleeve 30X is connected to an outlet sleeve 50X also on the base of the tank 44X. Finally, a plug valve 52X is provided in the base of the said tank 44X, so that the sewage contained in the tank 44X can be drained back into the manhole by releasing the plug should this be required for any reason.
  • reference 54X indicates the normal sewage level which will exist when the pump 4OX discharges sewage from the sewer 10X.
  • the inflation hose 26X is brought into the header tank 44X as shown in Fig. 18, and its leading end is connected to the top of the outlet sleeve 50X.
  • This in fact means that the sewage can then be used to cause the tube 26X to evert into and along the sleeve 3OX, the liner 28X and the sleeve 32X until the everting end of the inflation tube 26X eventually emerges through the inlet sleeve 48X of the next header tank 46X downstream.
  • the inflation tube so emerges from the next header tank basically it is cut to allow the sewage to escape into the next header tank 46X, and flow through the next header tank outlet 5OX in the same manner as described previously i.e. by means of an inflation hose 26X.
  • the sewage passes up to the first header tank and then flows through the liner in passing from the first header tank to the next header tank and so on, so that all of the liners 28X, 34X will be inflated up to the pipe surface, and as long as the sewage flow is maintained, they will be retained in that position until the resin cures, for example in a period of three to four hours.
  • the method fundamentally is similar to that described hereinbefore.
  • a particularly effective method is provided for the trapping of the emergent end of the inflation tube after it has passed through the inlet sleeve 48X of each header tank, and in this connection reference is made to Figs. 20 to 23 which show the sequence of operations.
  • Each figure shows a part of the header tank in sectional elevation, and it is assumed that the header tank shown is tank 46X, because in Fig. 15 in that tank, the inflation tube 30XL will emerge through the inlet sleeve 48X.
  • the conduit 32X is shown, and the inflation tube 3OX is shown as having emerged through the top of the inlet sleeve 48X to define an everting face 60X.
  • the face 6OX will not progress any higher than the position shown, due to the level 54X of the liquid in the adjacent header tank, and with the inflated tube 3OX in the position shown in Fig. 29, as shown in Fig. 21, a trapping sleeve 62X is pushed into the tube 3OX thereby to displace the tube 30 and cause it to be trapped between the inlet sleeve 48X and the trapping sleeve 6OX which are in fact tapered so as to wedge together.
  • Attached to sleeve 62X is a conical cover 64X which acts as an anti-splash device for the emergent sewage.
  • the inflation tube 30X will again evert through the inside of the sleeve 62X as shown in Fig. 22 so that a second eversion face 66X will be presented under the cover 64X, and it should be borne in mind at this time that the interior of the inflation tube 3OX is full of sewage.
  • an inflatable collar is provided on the inside of sleeve 48X which can be inflated against the tube and the outside of sleeve 62X to perform the trapping operation. In such case, it is not necessary that the lining sleeve 62X should be of tapered configuration.
  • Fig. 19 shows the circumstances in which the first pipe 18X has the lining tube 28X inflated thereagainst by the flowing sewage, the end sleeves 3OX and 32X also being full of sewage.
  • the figure also shows that the inflation tube 30X is in the process of being inflated into the lining tube 34X which is to line the pipe 36X.
  • the inflation tube may be everted directly onto the paper from the header tank using the flowing sewage as in the manner described.
  • the invention at least in some embodiments has a number of advantages including the following.
  • the price of the lining tube can be kept to a minimum, and a relatively inexpensive inflation tube can be adopted.
  • a single set of equipment at ground level can be utilised for lining pipes of different sizes.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un tube de garnissage (36) souple, imprégné de résine et d'un type connu, qui est appliqué sur la surface d'une conduite d'égout par mise en place du tube de garnissage (36) dans la conduite et gonflage du tube de garnissage (36) pour le plaquer contre ladite surface en retournant un tube gonflable pour former le tube de garnissage (36). L'invention est caractérisée en ce qu'on utilise de l'eau usée (26) pour retourner le tube. L'invention prévoit également l'utilisation d'une source (52) de rayonnement particulaire pour durcir la résine et, une nouvelle source (52) de rayonnement particulaire.
PCT/GB1994/000598 1993-09-14 1994-03-23 Ameliorations concernant le garnissage de conduites ou passages WO1995008075A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62631/94A AU6263194A (en) 1993-09-14 1994-03-23 Improvements relating to the lining of pipelines or passageways

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB939319017A GB9319017D0 (en) 1993-09-14 1993-09-14 Improvements relating to the lining of pipelines or passageways
GB9319017.1 1993-09-14
GB9400030.4 1994-01-04
GB9400030A GB9400030D0 (en) 1994-01-04 1994-01-04 Improvements relating to the lining of pipelines or passageways

Publications (1)

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WO1995008075A1 true WO1995008075A1 (fr) 1995-03-23

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PCT/GB1994/000598 WO1995008075A1 (fr) 1993-09-14 1994-03-23 Ameliorations concernant le garnissage de conduites ou passages

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AU (1) AU6263194A (fr)
IL (1) IL109972A0 (fr)
WO (1) WO1995008075A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0797042A1 (fr) * 1996-03-19 1997-09-24 Shonan Gosei - Jushi Seisakusho K.K. Dispositif et procédé de revêtement d'une conduite enterrée
DE102004043383A1 (de) * 2004-09-08 2006-03-23 Bernd-Jan Krasowski Inversionsschleuse mit einer Schleusenkammer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640313A (en) * 1983-12-19 1987-02-03 Stanley Robert K Interlining of pipelines for transporting sewage, water, slurries, liquid and gaseous hydrocarbons, and the like
EP0256140A1 (fr) * 1986-02-12 1988-02-24 Tokyo Gas Kabushiki Kaisha Procede de pose d'un revetement interieur de pipe-line
WO1988001707A1 (fr) * 1986-09-03 1988-03-10 Byggnads- & Industriservice Ab Binab Procede et appareil de garnissage interne d'une conduite
EP0393304A2 (fr) * 1989-02-27 1990-10-24 Hans Müller Procédé de revêtement d'une conduite enterrée
US5223204A (en) * 1990-03-06 1993-06-29 Get, Inc. Method and apparatus for reversing a tubular bag

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640313A (en) * 1983-12-19 1987-02-03 Stanley Robert K Interlining of pipelines for transporting sewage, water, slurries, liquid and gaseous hydrocarbons, and the like
EP0256140A1 (fr) * 1986-02-12 1988-02-24 Tokyo Gas Kabushiki Kaisha Procede de pose d'un revetement interieur de pipe-line
WO1988001707A1 (fr) * 1986-09-03 1988-03-10 Byggnads- & Industriservice Ab Binab Procede et appareil de garnissage interne d'une conduite
EP0393304A2 (fr) * 1989-02-27 1990-10-24 Hans Müller Procédé de revêtement d'une conduite enterrée
US5223204A (en) * 1990-03-06 1993-06-29 Get, Inc. Method and apparatus for reversing a tubular bag

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0797042A1 (fr) * 1996-03-19 1997-09-24 Shonan Gosei - Jushi Seisakusho K.K. Dispositif et procédé de revêtement d'une conduite enterrée
AU707163B2 (en) * 1996-03-19 1999-07-01 Get Inc. An apparatus and a method for lining an underground pipe
DE102004043383A1 (de) * 2004-09-08 2006-03-23 Bernd-Jan Krasowski Inversionsschleuse mit einer Schleusenkammer
DE102004043383B4 (de) * 2004-09-08 2006-05-18 Bernd-Jan Krasowski Inversionsschleuse mit einer Schleusenkammer

Also Published As

Publication number Publication date
IL109972A0 (en) 1994-10-07
AU6263194A (en) 1995-04-03

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