CA2079335C - Installation of lateral linings from the main pipeline out - Google Patents
Installation of lateral linings from the main pipeline out Download PDFInfo
- Publication number
- CA2079335C CA2079335C CA002079335A CA2079335A CA2079335C CA 2079335 C CA2079335 C CA 2079335C CA 002079335 A CA002079335 A CA 002079335A CA 2079335 A CA2079335 A CA 2079335A CA 2079335 C CA2079335 C CA 2079335C
- Authority
- CA
- Canada
- Prior art keywords
- lateral
- lining
- pipe
- collar
- tube
- 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.)
- Expired - Lifetime
Links
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The lining of a lateral pipe which leads into a main pipe is effected by everting a resin impregnated tubular lining through an elbow in the main pipe. Eversion is by means of fluid under pressure supplied through a pressure pipe. The elbow is held in position by an inflatable bag which is inflated by the said fluid and the bag also seals the lateral/main pipe junction. The bag is such that at least one additional pressure pipe may extend past the seal arrangement so that at the same time as the first mentioned lateral lining is curing, a second lateral may be similarly lined.
Description
INSTALLATION OF LATF~AI~ LININf3S ~'RO~t TSE I~LIN PIPELINE OUT
This invention relates to the lining of pipelines or passageways, using flexible tubular materials which are impregnated with curable synthetic resin and which, when placed in position lining the pipeline or passageway are held by fluid pressure against the pipeline or passageway surface until the resin cures to a hard condition leaving a hard lining pipe lying on the pipeline or passageway surface.
The most widely practised method using such resin impregnated linings is disclosed in British Patent No.
1449455 from which it will be seen that the impregnated lining is applied to the pipeline or passageway surface by eversion of same into the pipeline or passageway, using fluid pressure.
The present invention is concerned with lining pipelines which are called "laterals" insofar as they enter sidewise a main pipeline or passageway, such as a main sewer. Of any particular main line, there may be a plurality of laterals entering the main line, and it frequently arises that the laterals have to be lined by means of ,a resin impregnated tube. Using existing methods for lining laterals, it is not possible to perform any lining operation of a second or subsequent lateral whilst the lining in one lateral is being cured.
As the cure time may take up to 5 or 6 hours, if a section of main line having say 5 laterals to be lined is involved, the minimum total time to~line all laterals will be in the order of 25 to 34 hours. As these lining operations are required to be carried out during the night for purposes of convenience, it is often the case that the completion of the work has to take place over ~A~~~~5 several evenings and therefore the stork crew must depart the site and return at a later date to complete the work.
The present invention is concerned with providing an arrangement wherein the completion of a plurality of lateral lining operations may be effected in a much shorter period.
In accordance with the present invention, a plurality of laterals meeting a common main line are lined by inserting resin impregnated linings into said laterals and to hold same in position by fluid pressure whilst curing of the resin takes place, and after insertion of each lining, a seal arrangement at the location where the lateral meets the main line enables the second and subsequent laterals to be lined whilst the first or previosuly inserted lining is held in position and is being cured.
The seal arrangement may comprise a flexible bag which is pressurised with the medium which urges the lining against the lateral surface so as to prevent escape of the pressurising medium, but such bag allowing pressure fluid supplying pipes to pass to the inside or outside of the bag and to other lateral connections downstream of the bag in the main pipe whereby such,othex laterals may be lined by the eversion there into of a resin impregnated lining tube, the holding of the lining tube to the lateral surface being affected by fluid pressure, and a sealing bag retaining the lining in position and forming a seal between the lateral and the main line.
It will be seen that by using the method, the linings for the laterals can be inserted sequentially, and held in installed position under pressure, and cured simultaneously. A plurality of laterals can be lined and cured in a total time equal to the time it takes to line one lateral multiplied by the number of laterals plus the curing time for one of the lateral linings which total time in the case of 5 laterals may be in the order of 8 hours, which is a considerable reduction from the 25-30 hours which are required for the lining of 5 laterals by the conventional method. For example therefore the lateral lining on any particular contract may be capable of being completed in one evening as opposed to being completed in stages over two or three evenings.
In one aspect, the present invention provides a method of applying a lining to a lateral pipe which leads to a main pipe, wherein the lining comprises a resin impregnated tube having a resin impregnated collar at one end, the method comprising the steps of introducing the lining into the main pipe, aligning the collar with the lateral pipe end, pressing the collar against the main pipe to form a seal therewith, everting the resin impregnated tube through the collar and pressing it to the lateral pipe surface by fluid pressure, and curing the resin in the tube and the collar.
In another aspect, the present invention provides a flexible lining for lining a lateral pipe which leads to a main pipe, comprising a resin impregnable tube, and a resin impregnable collar at one end of said tube.
In another aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe from the main pipe out, comprising providing a resin impregnated lateral lining tube of finite length and open ended having at one end a collar of resin impregnated material with a central opening, the end of the lateral lining bonded to the collar about the opening, the collar adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the -3a-opposite end of the lateral lining extending into the lateral, positioning the collar in the main pipe at the entrance to the lateral with the opening in the collar aligned with the lateral;
inserting the lateral lining into the lateral pipe using a fluid medium under pressure to evert the liner through the opening in the collar, applying pressure to the lateral lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place.
In another aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe, comprising providing a resin impregnated lining tube of finite length and open ended and having at one end a collar of resin impregnated material with a central opening, the end of the lining tube bonded to the collar about the opening, the collar adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lining tube extending into the lateral, inserting the lining tube into the lateral pipe and using a fluid medium under pressure expanding the lateral lining against the lateral wall, applying pressure to the lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place.
In another aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe, wherein a resin impregnated lining is inserted into the lateral pipe from inside the main pipe using a fluid medium under -3b-pressure, and wherein a seal arrangement forms a seal at the location where the lateral meets the main pipe as curing of the resin takes place, and wherein the fluid medium is supplied to insert the lateral lining by means of a pressure pipe, and at least one additional pressure pipe extends past the seal arrangement so that pressure fluid can be applied to another lateral lining remote from the first mentioned lateral lining while curing of the first mentioned lateral lining is taking place.
In another aspect, the present invention provides an apparatus for inserting a resin impregnated lining into a lateral pipe which leads to a main pipe comprising an elbow pipe by which the lining is inverted into the lateral pipe from inside the main pipe using fluid medium under pressure into the lateral from the main pipe, said elbow pipe having connected thereto an inflatable sealing arrangement whereby the elbow may be locked in position in the main pipe by means of said fluid medium, and so that a pressure pipe may extend along the main pipe past the sealing arrangement so that a further lining may be inserted into a further lateral while the sealing arrangement holds the elbow in position in the main pipe and the resin impregnated first mentioned lining cures.
In another aspect, the present invention provides a lining of resin absorbent material adapted to line a lateral passageway connected to a main passageway, comprising a substantially tubular lining tube of fibrous material capable of being impregnated and formed to conform to the dimension of the lateral and having at one end bonded thereto a collar of a fibrous material capable of being impregnated with a curable resin and adapted to engage and conform to the interior surface of the main passageway at the location of the connection between the lateral and the main passageway.
In another aspect, the present invention provides an apparatus for inserting a flexible tubular lining into a -3c-lateral pipeline connected to a main pipeline from a remote location in the main pipeline wherein:
the tubular lining includes a substantially hollow tubular portion formed of a resin impregnable layer and an outer impermeable layer and a resin impregnable flange-like collar bonded to one end of the tubular portion, comprising:
a hollow elbow pipe having a cavity formed with a radial portion having an opening facing the lateral and a longitudinal portion extending along the axis of the main pipeline for receiving the lining within the cavity in the hollow portion of the elbow pipe;
the radial portion of the elbow pipe having a shoulder region about the opening for receiving the collar portion of the lining with the tubular portion of the lining extending within the longitudinal portion of the elbow pipe;
and a sealing member at the longitudinal end of the elbow pipe, the sealing member having at least one opening;
fluid pressure means connected to the interior of the elbow means for everting the lining through the collar; and expandable bladder means about the elbow surrounding the shoulder and opening in the elbow pipe with means to inflate and expand the bladder means coupled thereto, whereby upon locating the lateral position along the main pipeline and aligning the opening in the radial portion of the elbow pipe with the lateral, the bladder means is inflated to fix position of the apparatus and press the collar against the surface of the pipeline and tubular portion of the lining is everted through the collar and holds the tubular portion of the lining in position against the interior of the lateral until the resin cures.
In another aspect, the present invention provides an apparatus for inserting a flexible tubular lining into a lateral pipeline connected to a main pipeline from a remote location in the main pipeline wherein:
the tubular lining includes a substantially hollow tubular portion formed of a resin impregnable layer and an outer impermeable layer and a resin impregnable flange-like collar bonded to one end of the tubular portion, comprising:
-3d-a hollow elbow pipe having a cavity formed with a radial portion having an opening facing the lateral and a longitudinal portion extending along the axis of the main pipeline for receiving the lining within the cavity in the hollow portion of the elbow pipe;
the radial portion of the elbow pipe having a shoulder region about the opening for receiving the collar portion of the lining with the tubular portion of the lining extending within the longitudinal portion of the elbow pipe and fluid pressure means connected to the interior of the elbow means for everting the lining through the collar; and expandable bladder means about the elbow surrounding the shoulder and opening in the elbow pipe with means to inflate and expand the bladder means coupled thereto, a hollow containment tube having a distal end and a proximal end; a sealing member at the proximal end of the containment tube, the sealing member having an access opening for applying pressure to the interior of the containment tube;
the distal end of the containment tube extending proximally from the longitudinal portion of the elbow pipe;
a hollow carrier tube having a proximal end and a distal end;
the distal end of the carrier tube connected to the shoulder region of the radial portion of the elbow pipe and the proximal end being sealed; and a pressure hose communicating with the access opening in the sealing member for introducing pressurized fluid into the cavity between the carrier tube and the elbow pipe;
whereby upon locating the lateral position along the main pipeline and aligning the opening in the radial portion of the elbow pipe with the lateral, the bladder means is inflated to fix position of the apparatus and press the collar against the surface of the pipeline and tubular portion of the lining is everted through the collar and holds the tubular portion of the lining in position against the interior of the lateral until the resin cures.
-3e-In a further aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe from the main pipe out, comprising:
providing a resin impregnated lateral lining tube of finite length and open ended having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, positioning the collar in the main pipe at the entrance to the lateral with the opening in the collar aligned with the lateral;
inserting the lateral lining tube into the lateral pipe using a fluid medium under pressure to evert the lateral lining tube through the opening in the collar, applying pressure to the lateral lining tube, applying pressure to the collar on the surface of the main pipe to urge the collar against the main pipe; and curing the resin in the lining tube and collar to form a seal at the location where the lateral meets the main pipe.
In yet a further aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe, comprising:
providing a resin impregnated lateral lining tube of finite length and open ended and having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, inserting the lateral lining tube into the lateral pipe using a fluid medium under pressure to evert the tube through the opening in the collar with the collar at the entrance to the lateral with the opening in the collar aligned with the lateral, -3f-applying pressure to the lateral lining tube to urge the lining tube against the lateral, applying pressure to the collar on the surface of the main pipe to urge the collar against the main pipe; and curing the resin in the lining and collar to form a seal at the location where the lateral meets the main pipe.
Embodiments of the invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, wherein:-Fig. 1 is a diagrammatic side elevation showing the method by which a lateral is lined in accordance with the method of the invention;
Fig. 2 is a sectional elevation taken on the line II-II;
Fig. 3 is an enlarged sectional view of the detail ringed III
in Fig. 1;
Fig. 4 is an enlarged sectional view of the detail ringed IV
in Fig. 1;
Fig. 5 is a sectional side view of an alternative form of apparatus for carrying out the method of the invention.
Fig. 6 is an end view of the arrangement shown in Fig. 5; and Fig. 7 is a perspective view of the lining tube used in the method of Figs. 5 and 6.
Referring to the drawings, in Fig. 1 a main line 10 is intersected by a lateral 12 which is to be lined in accordance with a first method of the invention.
For the lining operation, a resin impregnated flexible lining 14 has a beaded end 16 which is reinforced, and forms a ring which seats against the opening of the lateral 12. The tube 14 is loaded inside a carrier tube 18. Carrier tube 18 has one end 20 anchored to an elbow pipe 22, and to the other end of the elbow 22 is connected a containment tube 24. A disc 26 seals the other end of the containment tube, but extending through the disc is a pressure hose 28 and a bleed hose 30.
The pressure hose 28 and bleed hose 30 can slide through the disc 26 as insertion of the lining tube 14 takes place as will be explained.
If reference is made now to Fig, 4, as shown, the tail end of the carrier tube 18 is closed around the bleed hose 30, and the pressure hose 28 is connected to the closed end of the carrier tube 18. The end of the lining tube 14 stops short of the end of the carrier tube so that the lining tube can be left in position lining the lateral 12.
The method of insertion comprises the introduction of pressurising fluid, water or gas, through the pressure hose 28 into the space between the containment tube 24 and the carrier tube 18 with the result that the carrier tube 18 and the lining tube 14 are averted as shown at 32 in Fig. 1 into the lateral 12, the lining tube 14 being presented to the lateral surface. The assembly of tubes 14 and 18 therefore averts into the lateral 12 and the pressure hose 28 and the bleed hose 30 are pulled through the containment tube, through the elbow 22 and up to the top end of the lateral. The portion 30A of the bleed hose projects out of the end of the aversion face so that if any water collects above the lining, it can bleed WO .-. /16568 PCT/G B91 /00628 __ 5 _ 20'79335 through end 30A, which is provided with apertures 34 for this purpose, out of the tube 30 and~back to drain s~
that there will be no undesirable collection of liquid in the lateral whilst lining is taking place.
The pressure fluid which is supplied by the hose 28 leaks through an aperture 36 in the elbow 22 and pressurises a bag or bladder 38 surrounding the elbow as shown. The bladder is therefore inflated so as to seal against the main line 10 and to seal the end 16 of the lining. The aperture is provided with or acts as a pressure reduction means so that whilst the everting pressure may be of the order of 20 p.s.i., the pressure in the bag or bladder 38 is much lower e.g. in the order of 5 p.s.i. The bladder 38 remains pressurised as long as the pressure is maintained inside the everted lining and carrier tube.
As soon as this position has been reached, a towing assembly 40 which is used for positioning the elbow 22 by being connected thereto through a link 42 fast with elbow 22, is released from that link insofar as, as shown in Fig. 3, the link 42 has a socket 44 in which engages a centralising pin 46. The wall of the socket 44 has aligned apertures 48, 50 in which pegs 52 and 54 engage, these pegs being carried by pivotable jaws 56 and 58.
The jaws 56 and 58 are connected to the clamping device 60 having swingable arms 62 and 64 on the ends of which are provided guide rollers 66 and 68. As the bladder 38 inflates, the rollers 66 which are held inwardly by spring action are caused to pivot to the position shown in Fig. 1 which has the effect of moving the jaws 56 and 58 apart to remove the pegs 52 and 54 from the apertures 48 and 50 and the positioning device 40 and the device 60 with the rollers and jaws can be detached from the bladder and the connecting tube 42 so that it can be pulled along the line 10 away from the inflated bladder.
A series of additional pressure pipes and corresponding WO 91 / 1656$ PCT/G B91 /00628 _. - 6 - 2079335 bleed pipes 70, 72 (four in all) extend to the outside o.' the bladder 38 and are removably attached to the positioning device 40. Device 40 is moved to the other end of the main line 10 and a second assembly comprising elbow 22, bladder 38, containment tube 24, sealing disc 26 and the carrier tube and lining 18 and 14 with bladder 38 is connected to the positioning device (and one of the additional pressure/bleed pipe pair) which is again moved back into the mainline 10 until the next lateral to be lined is reached when the device is placed in register therewith so that by appropriate pressurising of the assembly as described in relation to Fig. 1, the lining tube can be inserted into position in the lateral. When this process has been completed, the procedure is again repeated so that all five laterals can have lining tubes placed therein and the lining tubes can be cured simultaneously.
To effect the curing, it may be necessary to circulate hot water, steam or hot air through the pressurising hoses 28, 70 and 72 if the resin is of the heat cure type.
When curing has been completed, it is simply a matter of releasing the pressure in each of the bladders 38 which will then collapse, and each can be removed from the main line 10 by pulling on the pressure hose 28, 70 or 72 as the case may be. The retraction of such hose retracts the carrier tube 18 from inside the lateral, leaving the rigid lining tube 14 in position.
In the alternative arrangement shown in Figs. 5, 6 and 7, the method of operation is the same as that described in relation to Figs. 1-4, and only the structure of the bladder is varied in order to make it easier for the additonal pressure/bleed pipes to pass the bladder assembly whilst it is inflated.
W(._ 1/16568 PCT/GB91/00628 - 7 - 20"~933~
Thus, the bladder is in the form of diametrically opposite inflatable pillows 80, 82 which are carried on inner diametrically opposite plates, 84, $b connected t~
the elbow 22 by being bolted thereto by bolts 88. Plate 86 is carried by the elbow 22 on a radial leg 90 which is adjustable in length so that the arrangement can be adjusted to suit pipes of different diameters. Pillow 80 has a hole, 92 therein through which the elbow pipe 22 passes the pipe 94 which extends from the elbow 22 forms passage for the eve ping medium and also carries the coupling 42. Pipes 96, 98 connect the interior of the pipe 94 and the pillows 80, 82. The aperture 36 is also shown in Fig. 5. The operation of the arrangement of Figs. 5, 6 and 7 will be understood from the previous description of the embodiment of Figs 1-4. The lining 14 and the carrier tube 18 are inverted by pressurising the interior of elbow 22 and at the same time by passage of the pressurising medium through hole 36, pipe 94, and pipes 96, 98 inflation of the pillows 80, 82 to seal the lateral aperture whilst eversion takes place. The additional pressure/bleed pipes 70, 72 can pass between the pillows easily as shown in Fig. 6 in dotted lines.
Whilst pillow 80 seals the lateral, pillow 82 forms a reaction means.
The lining tube 14 in the Fig. 7 arrangement as shown has a collar. 100 which is preferably a sealed envelope containing a resin absorbent material which is impregnated with curable synthetic resin similar to the tube itself. As the lining tube 14 cures so the collar will also cure and the collar remains in place around the lateral aperture.
The present invention provides a system whereby a plurality of lateral linings may be cured simultaneously thereby reducing the overall cure time in a contract where a number of laterals have to be lined.
This invention relates to the lining of pipelines or passageways, using flexible tubular materials which are impregnated with curable synthetic resin and which, when placed in position lining the pipeline or passageway are held by fluid pressure against the pipeline or passageway surface until the resin cures to a hard condition leaving a hard lining pipe lying on the pipeline or passageway surface.
The most widely practised method using such resin impregnated linings is disclosed in British Patent No.
1449455 from which it will be seen that the impregnated lining is applied to the pipeline or passageway surface by eversion of same into the pipeline or passageway, using fluid pressure.
The present invention is concerned with lining pipelines which are called "laterals" insofar as they enter sidewise a main pipeline or passageway, such as a main sewer. Of any particular main line, there may be a plurality of laterals entering the main line, and it frequently arises that the laterals have to be lined by means of ,a resin impregnated tube. Using existing methods for lining laterals, it is not possible to perform any lining operation of a second or subsequent lateral whilst the lining in one lateral is being cured.
As the cure time may take up to 5 or 6 hours, if a section of main line having say 5 laterals to be lined is involved, the minimum total time to~line all laterals will be in the order of 25 to 34 hours. As these lining operations are required to be carried out during the night for purposes of convenience, it is often the case that the completion of the work has to take place over ~A~~~~5 several evenings and therefore the stork crew must depart the site and return at a later date to complete the work.
The present invention is concerned with providing an arrangement wherein the completion of a plurality of lateral lining operations may be effected in a much shorter period.
In accordance with the present invention, a plurality of laterals meeting a common main line are lined by inserting resin impregnated linings into said laterals and to hold same in position by fluid pressure whilst curing of the resin takes place, and after insertion of each lining, a seal arrangement at the location where the lateral meets the main line enables the second and subsequent laterals to be lined whilst the first or previosuly inserted lining is held in position and is being cured.
The seal arrangement may comprise a flexible bag which is pressurised with the medium which urges the lining against the lateral surface so as to prevent escape of the pressurising medium, but such bag allowing pressure fluid supplying pipes to pass to the inside or outside of the bag and to other lateral connections downstream of the bag in the main pipe whereby such,othex laterals may be lined by the eversion there into of a resin impregnated lining tube, the holding of the lining tube to the lateral surface being affected by fluid pressure, and a sealing bag retaining the lining in position and forming a seal between the lateral and the main line.
It will be seen that by using the method, the linings for the laterals can be inserted sequentially, and held in installed position under pressure, and cured simultaneously. A plurality of laterals can be lined and cured in a total time equal to the time it takes to line one lateral multiplied by the number of laterals plus the curing time for one of the lateral linings which total time in the case of 5 laterals may be in the order of 8 hours, which is a considerable reduction from the 25-30 hours which are required for the lining of 5 laterals by the conventional method. For example therefore the lateral lining on any particular contract may be capable of being completed in one evening as opposed to being completed in stages over two or three evenings.
In one aspect, the present invention provides a method of applying a lining to a lateral pipe which leads to a main pipe, wherein the lining comprises a resin impregnated tube having a resin impregnated collar at one end, the method comprising the steps of introducing the lining into the main pipe, aligning the collar with the lateral pipe end, pressing the collar against the main pipe to form a seal therewith, everting the resin impregnated tube through the collar and pressing it to the lateral pipe surface by fluid pressure, and curing the resin in the tube and the collar.
In another aspect, the present invention provides a flexible lining for lining a lateral pipe which leads to a main pipe, comprising a resin impregnable tube, and a resin impregnable collar at one end of said tube.
In another aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe from the main pipe out, comprising providing a resin impregnated lateral lining tube of finite length and open ended having at one end a collar of resin impregnated material with a central opening, the end of the lateral lining bonded to the collar about the opening, the collar adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the -3a-opposite end of the lateral lining extending into the lateral, positioning the collar in the main pipe at the entrance to the lateral with the opening in the collar aligned with the lateral;
inserting the lateral lining into the lateral pipe using a fluid medium under pressure to evert the liner through the opening in the collar, applying pressure to the lateral lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place.
In another aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe, comprising providing a resin impregnated lining tube of finite length and open ended and having at one end a collar of resin impregnated material with a central opening, the end of the lining tube bonded to the collar about the opening, the collar adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lining tube extending into the lateral, inserting the lining tube into the lateral pipe and using a fluid medium under pressure expanding the lateral lining against the lateral wall, applying pressure to the lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place.
In another aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe, wherein a resin impregnated lining is inserted into the lateral pipe from inside the main pipe using a fluid medium under -3b-pressure, and wherein a seal arrangement forms a seal at the location where the lateral meets the main pipe as curing of the resin takes place, and wherein the fluid medium is supplied to insert the lateral lining by means of a pressure pipe, and at least one additional pressure pipe extends past the seal arrangement so that pressure fluid can be applied to another lateral lining remote from the first mentioned lateral lining while curing of the first mentioned lateral lining is taking place.
In another aspect, the present invention provides an apparatus for inserting a resin impregnated lining into a lateral pipe which leads to a main pipe comprising an elbow pipe by which the lining is inverted into the lateral pipe from inside the main pipe using fluid medium under pressure into the lateral from the main pipe, said elbow pipe having connected thereto an inflatable sealing arrangement whereby the elbow may be locked in position in the main pipe by means of said fluid medium, and so that a pressure pipe may extend along the main pipe past the sealing arrangement so that a further lining may be inserted into a further lateral while the sealing arrangement holds the elbow in position in the main pipe and the resin impregnated first mentioned lining cures.
In another aspect, the present invention provides a lining of resin absorbent material adapted to line a lateral passageway connected to a main passageway, comprising a substantially tubular lining tube of fibrous material capable of being impregnated and formed to conform to the dimension of the lateral and having at one end bonded thereto a collar of a fibrous material capable of being impregnated with a curable resin and adapted to engage and conform to the interior surface of the main passageway at the location of the connection between the lateral and the main passageway.
In another aspect, the present invention provides an apparatus for inserting a flexible tubular lining into a -3c-lateral pipeline connected to a main pipeline from a remote location in the main pipeline wherein:
the tubular lining includes a substantially hollow tubular portion formed of a resin impregnable layer and an outer impermeable layer and a resin impregnable flange-like collar bonded to one end of the tubular portion, comprising:
a hollow elbow pipe having a cavity formed with a radial portion having an opening facing the lateral and a longitudinal portion extending along the axis of the main pipeline for receiving the lining within the cavity in the hollow portion of the elbow pipe;
the radial portion of the elbow pipe having a shoulder region about the opening for receiving the collar portion of the lining with the tubular portion of the lining extending within the longitudinal portion of the elbow pipe;
and a sealing member at the longitudinal end of the elbow pipe, the sealing member having at least one opening;
fluid pressure means connected to the interior of the elbow means for everting the lining through the collar; and expandable bladder means about the elbow surrounding the shoulder and opening in the elbow pipe with means to inflate and expand the bladder means coupled thereto, whereby upon locating the lateral position along the main pipeline and aligning the opening in the radial portion of the elbow pipe with the lateral, the bladder means is inflated to fix position of the apparatus and press the collar against the surface of the pipeline and tubular portion of the lining is everted through the collar and holds the tubular portion of the lining in position against the interior of the lateral until the resin cures.
In another aspect, the present invention provides an apparatus for inserting a flexible tubular lining into a lateral pipeline connected to a main pipeline from a remote location in the main pipeline wherein:
the tubular lining includes a substantially hollow tubular portion formed of a resin impregnable layer and an outer impermeable layer and a resin impregnable flange-like collar bonded to one end of the tubular portion, comprising:
-3d-a hollow elbow pipe having a cavity formed with a radial portion having an opening facing the lateral and a longitudinal portion extending along the axis of the main pipeline for receiving the lining within the cavity in the hollow portion of the elbow pipe;
the radial portion of the elbow pipe having a shoulder region about the opening for receiving the collar portion of the lining with the tubular portion of the lining extending within the longitudinal portion of the elbow pipe and fluid pressure means connected to the interior of the elbow means for everting the lining through the collar; and expandable bladder means about the elbow surrounding the shoulder and opening in the elbow pipe with means to inflate and expand the bladder means coupled thereto, a hollow containment tube having a distal end and a proximal end; a sealing member at the proximal end of the containment tube, the sealing member having an access opening for applying pressure to the interior of the containment tube;
the distal end of the containment tube extending proximally from the longitudinal portion of the elbow pipe;
a hollow carrier tube having a proximal end and a distal end;
the distal end of the carrier tube connected to the shoulder region of the radial portion of the elbow pipe and the proximal end being sealed; and a pressure hose communicating with the access opening in the sealing member for introducing pressurized fluid into the cavity between the carrier tube and the elbow pipe;
whereby upon locating the lateral position along the main pipeline and aligning the opening in the radial portion of the elbow pipe with the lateral, the bladder means is inflated to fix position of the apparatus and press the collar against the surface of the pipeline and tubular portion of the lining is everted through the collar and holds the tubular portion of the lining in position against the interior of the lateral until the resin cures.
-3e-In a further aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe from the main pipe out, comprising:
providing a resin impregnated lateral lining tube of finite length and open ended having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, positioning the collar in the main pipe at the entrance to the lateral with the opening in the collar aligned with the lateral;
inserting the lateral lining tube into the lateral pipe using a fluid medium under pressure to evert the lateral lining tube through the opening in the collar, applying pressure to the lateral lining tube, applying pressure to the collar on the surface of the main pipe to urge the collar against the main pipe; and curing the resin in the lining tube and collar to form a seal at the location where the lateral meets the main pipe.
In yet a further aspect, the present invention provides a method of lining a lateral pipe leading into a main pipe, comprising:
providing a resin impregnated lateral lining tube of finite length and open ended and having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, inserting the lateral lining tube into the lateral pipe using a fluid medium under pressure to evert the tube through the opening in the collar with the collar at the entrance to the lateral with the opening in the collar aligned with the lateral, -3f-applying pressure to the lateral lining tube to urge the lining tube against the lateral, applying pressure to the collar on the surface of the main pipe to urge the collar against the main pipe; and curing the resin in the lining and collar to form a seal at the location where the lateral meets the main pipe.
Embodiments of the invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, wherein:-Fig. 1 is a diagrammatic side elevation showing the method by which a lateral is lined in accordance with the method of the invention;
Fig. 2 is a sectional elevation taken on the line II-II;
Fig. 3 is an enlarged sectional view of the detail ringed III
in Fig. 1;
Fig. 4 is an enlarged sectional view of the detail ringed IV
in Fig. 1;
Fig. 5 is a sectional side view of an alternative form of apparatus for carrying out the method of the invention.
Fig. 6 is an end view of the arrangement shown in Fig. 5; and Fig. 7 is a perspective view of the lining tube used in the method of Figs. 5 and 6.
Referring to the drawings, in Fig. 1 a main line 10 is intersected by a lateral 12 which is to be lined in accordance with a first method of the invention.
For the lining operation, a resin impregnated flexible lining 14 has a beaded end 16 which is reinforced, and forms a ring which seats against the opening of the lateral 12. The tube 14 is loaded inside a carrier tube 18. Carrier tube 18 has one end 20 anchored to an elbow pipe 22, and to the other end of the elbow 22 is connected a containment tube 24. A disc 26 seals the other end of the containment tube, but extending through the disc is a pressure hose 28 and a bleed hose 30.
The pressure hose 28 and bleed hose 30 can slide through the disc 26 as insertion of the lining tube 14 takes place as will be explained.
If reference is made now to Fig, 4, as shown, the tail end of the carrier tube 18 is closed around the bleed hose 30, and the pressure hose 28 is connected to the closed end of the carrier tube 18. The end of the lining tube 14 stops short of the end of the carrier tube so that the lining tube can be left in position lining the lateral 12.
The method of insertion comprises the introduction of pressurising fluid, water or gas, through the pressure hose 28 into the space between the containment tube 24 and the carrier tube 18 with the result that the carrier tube 18 and the lining tube 14 are averted as shown at 32 in Fig. 1 into the lateral 12, the lining tube 14 being presented to the lateral surface. The assembly of tubes 14 and 18 therefore averts into the lateral 12 and the pressure hose 28 and the bleed hose 30 are pulled through the containment tube, through the elbow 22 and up to the top end of the lateral. The portion 30A of the bleed hose projects out of the end of the aversion face so that if any water collects above the lining, it can bleed WO .-. /16568 PCT/G B91 /00628 __ 5 _ 20'79335 through end 30A, which is provided with apertures 34 for this purpose, out of the tube 30 and~back to drain s~
that there will be no undesirable collection of liquid in the lateral whilst lining is taking place.
The pressure fluid which is supplied by the hose 28 leaks through an aperture 36 in the elbow 22 and pressurises a bag or bladder 38 surrounding the elbow as shown. The bladder is therefore inflated so as to seal against the main line 10 and to seal the end 16 of the lining. The aperture is provided with or acts as a pressure reduction means so that whilst the everting pressure may be of the order of 20 p.s.i., the pressure in the bag or bladder 38 is much lower e.g. in the order of 5 p.s.i. The bladder 38 remains pressurised as long as the pressure is maintained inside the everted lining and carrier tube.
As soon as this position has been reached, a towing assembly 40 which is used for positioning the elbow 22 by being connected thereto through a link 42 fast with elbow 22, is released from that link insofar as, as shown in Fig. 3, the link 42 has a socket 44 in which engages a centralising pin 46. The wall of the socket 44 has aligned apertures 48, 50 in which pegs 52 and 54 engage, these pegs being carried by pivotable jaws 56 and 58.
The jaws 56 and 58 are connected to the clamping device 60 having swingable arms 62 and 64 on the ends of which are provided guide rollers 66 and 68. As the bladder 38 inflates, the rollers 66 which are held inwardly by spring action are caused to pivot to the position shown in Fig. 1 which has the effect of moving the jaws 56 and 58 apart to remove the pegs 52 and 54 from the apertures 48 and 50 and the positioning device 40 and the device 60 with the rollers and jaws can be detached from the bladder and the connecting tube 42 so that it can be pulled along the line 10 away from the inflated bladder.
A series of additional pressure pipes and corresponding WO 91 / 1656$ PCT/G B91 /00628 _. - 6 - 2079335 bleed pipes 70, 72 (four in all) extend to the outside o.' the bladder 38 and are removably attached to the positioning device 40. Device 40 is moved to the other end of the main line 10 and a second assembly comprising elbow 22, bladder 38, containment tube 24, sealing disc 26 and the carrier tube and lining 18 and 14 with bladder 38 is connected to the positioning device (and one of the additional pressure/bleed pipe pair) which is again moved back into the mainline 10 until the next lateral to be lined is reached when the device is placed in register therewith so that by appropriate pressurising of the assembly as described in relation to Fig. 1, the lining tube can be inserted into position in the lateral. When this process has been completed, the procedure is again repeated so that all five laterals can have lining tubes placed therein and the lining tubes can be cured simultaneously.
To effect the curing, it may be necessary to circulate hot water, steam or hot air through the pressurising hoses 28, 70 and 72 if the resin is of the heat cure type.
When curing has been completed, it is simply a matter of releasing the pressure in each of the bladders 38 which will then collapse, and each can be removed from the main line 10 by pulling on the pressure hose 28, 70 or 72 as the case may be. The retraction of such hose retracts the carrier tube 18 from inside the lateral, leaving the rigid lining tube 14 in position.
In the alternative arrangement shown in Figs. 5, 6 and 7, the method of operation is the same as that described in relation to Figs. 1-4, and only the structure of the bladder is varied in order to make it easier for the additonal pressure/bleed pipes to pass the bladder assembly whilst it is inflated.
W(._ 1/16568 PCT/GB91/00628 - 7 - 20"~933~
Thus, the bladder is in the form of diametrically opposite inflatable pillows 80, 82 which are carried on inner diametrically opposite plates, 84, $b connected t~
the elbow 22 by being bolted thereto by bolts 88. Plate 86 is carried by the elbow 22 on a radial leg 90 which is adjustable in length so that the arrangement can be adjusted to suit pipes of different diameters. Pillow 80 has a hole, 92 therein through which the elbow pipe 22 passes the pipe 94 which extends from the elbow 22 forms passage for the eve ping medium and also carries the coupling 42. Pipes 96, 98 connect the interior of the pipe 94 and the pillows 80, 82. The aperture 36 is also shown in Fig. 5. The operation of the arrangement of Figs. 5, 6 and 7 will be understood from the previous description of the embodiment of Figs 1-4. The lining 14 and the carrier tube 18 are inverted by pressurising the interior of elbow 22 and at the same time by passage of the pressurising medium through hole 36, pipe 94, and pipes 96, 98 inflation of the pillows 80, 82 to seal the lateral aperture whilst eversion takes place. The additional pressure/bleed pipes 70, 72 can pass between the pillows easily as shown in Fig. 6 in dotted lines.
Whilst pillow 80 seals the lateral, pillow 82 forms a reaction means.
The lining tube 14 in the Fig. 7 arrangement as shown has a collar. 100 which is preferably a sealed envelope containing a resin absorbent material which is impregnated with curable synthetic resin similar to the tube itself. As the lining tube 14 cures so the collar will also cure and the collar remains in place around the lateral aperture.
The present invention provides a system whereby a plurality of lateral linings may be cured simultaneously thereby reducing the overall cure time in a contract where a number of laterals have to be lined.
Claims (67)
1. A method of applying a lining to a lateral pipe which leads to a main pipe, wherein the lining comprises a resin impregnated tube having a resin impregnated collar at one end, the method comprising the steps of introducing the lining into the main pipe, aligning the collar with the lateral pipe end, pressing the collar against the main pipe to form a seal therewith, everting the resin impregnated tube through the collar and pressing it to the lateral pipe surface by fluid pressure, and curing the resin in the tube and the collar.
2. A method according to Claim 1, wherein the step of pressing the collar is performed by inflating an inflatable means.
3. A method according to Claim 2, wherein the inflatable means is in the form of a pair of spaced diametrically opposed inflatable pillows.
4. A method according to Claims 2 or 3, wherein the same fluid is used for inflating said inflatable means as is used for pressing the impregnated tube to the lateral pipe, but at a lower pressure.
5. A method according to any one of Claims 1 to 4, wherein the fluid medium is supplied to evert the lining tube by means of a pressure pipe, and at least one additional pressure pipe extends past the seal so that pressure fluid can be applied to another lateral lining remote from the first mentioned lateral whilst curing of resin of the first mentioned lateral lining is taking place.
6. A method according to any one of Claims 1 to 5, including the use of an elbow pipe through which the lining is everted to be inserted into the lateral pipe.
7. A lining for lining a lateral pipe which leads to a main pipe, comprising a resin impregnable tube, and a resin impregnable collar at one end of said tube.
8. A lining tube according to Claim 7, wherein the said collar includes reinforcement means.
9. A method of lining a lateral pipe leading into a main pipe from the main pipe out, comprising providing a resin impregnated lining tube of finite length and open ended having at one end a collar of resin impregnated material with a central opening, the end of the lining tube bonded to the collar about the opening, the collar adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, positioning the collar in the main pipe at the entrance to the lateral with the opening in the collar aligned with the lateral;
inserting the lining tube into the lateral pipe using a fluid medium under pressure to even the liner through the opening in the collar, applying pressure to the lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place.
inserting the lining tube into the lateral pipe using a fluid medium under pressure to even the liner through the opening in the collar, applying pressure to the lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place.
10. A method according to Claim 9, wherein the seal is formed by an inflatable means, said means being inflated by the fluid medium used for inserting the lateral lining, but at a lower pressure.
11. A method according to Claim 9, wherein the fluid medium is supplied to insert the lining, by means of a pressure pipe, and at least one additional pressure pipe extends past the seal arrangement so that pressure fluid can be applied to another lining remote from the first mentioned lateral whilst curing of the first mentioned lining is taking place.
12. A method according to Claim 9, wherein the seal arrangement is formed by use of an elbow pipe to position the lining at the entrance to the lateral and through which the lining is everted to be inserted into the lateral.
13. A method according to Claim 10, wherein the inflatable means comprises a bag or bladder which is inflated against the main pipe surface.
14. A method according to Claim 13, wherein the bag or bladder is in the form of a pair of spaced diametrically opposed inflatable pillows.
15. A method of lining a lateral pipe leading into a main pipe, comprising providing a resin impregnated lining tube of finite length and open ended and having at one end a collar of resin impregnated material with a central opening, the end of the lining tube bonded to the collar about the opening, the collar adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lining tube extending into the lateral, inserting the lining tube into the lateral pipe and using a fluid medium under pressure expanding the lateral lining against the lateral wall, applying pressure to the lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place.
16. The method according to Claim 15, including applying pressure to the collar by an inflatable means which is a bag or bladder.
17. The method according to Claim 16, including pressing the collar against the main pipe by an inflatable means connected to an elbow pipe and inverting the lining tube through the elbow pipe into the lateral.
18. A method of lining a lateral pipe leading into a main pipe, wherein a resin impregnated lining is inserted into the lateral pipe from inside the main pipe using a fluid medium under pressure, and wherein a seal arrangement forms a seal at the location where the lateral meets the main pipe as curing of the resin takes place, and wherein the fluid medium is supplied to insert the lateral lining by means of a pressure pipe, and at least one additional pressure pipe extends past the seal arrangement so that pressure fluid can be applied to another lateral lining remote from the first mentioned lateral lining while curing of the first mentioned lateral lining is taking place.
19. The method according to Claim 18, wherein said seal is formed by an inflatable means, said inflatable means being inflated by the fluid medium used for inserting the lateral lining, but at a lower pressure.
20. The method according to Claim 18, wherein the lateral lining is everted into the lateral through an elbow pipe and the seal arrangement is exterior of the elbow pipe.
21. The method according to claim 19, wherein the lateral lining is evened into the lateral through an elbow pipe and the seal arrangement is exterior of the elbow pipe.
22. The method according to Claim 19, wherein the inflatable means comprises a bag or bladder which is inflated against the main pipe.
23. A method according to Claim 19, wherein said inflatable means comprises a pair of spaced diametrically opposed inflatable pillows.
24. A method according to Claim 18, wherein the lining tube is provided with a collar which is applied to the location at which the lateral meets the main pipe, and the lining is of finite length and is open ended.
25. Apparatus for inserting a resin impregnated lining into a lateral pipe which leads to a main pipe comprising an elbow pipe by which the lining is inverted into the lateral pipe from inside the main pipe using fluid medium under pressure into the lateral from the main pipe, said elbow pipe having connected thereto an inflatable sealing arrangement whereby the elbow may be locked in position in the main pipe by means of said fluid medium, and so that a pressure pipe may extend along the main pipe past the sealing arrangement so that a further lining may be inserted into a further lateral while the sealing arrangement holds the elbow in position in the main pipe and the resin impregnated first mentioned lining cures.
26. A lining of resin absorbent material adapted to line a lateral passageway connected to a main passageway, comprising a substantially tubular lining tube of fibrous material capable of being impregnated and conforming to the dimension of the lateral and having at one end bonded thereto a collar of a fibrous material capable of being impregnated with a curable resin and adapted to engage and conform to the interior surface of the main passageway at the location of the connection between the lateral and the main passageway.
27. The lining of Claim 26, further including reinforcement means in the liner at the junction between the tubular fibrous material and the collar for seating against the opening of the lateral.
28. An apparatus for inserting a flexible tubular lining into a lateral pipeline connected to a main pipeline wherein:
the tubular lining includes a substantially hollow tubular portion formed of a sealed envelope of resin impregnable layer and a resin impregnable flange-like collar bonded to one end of the tubular portion, comprising:
a hollow elbow pipe formed with a radial portion having an opening facing the lateral and a longitudinal portion extending along the axis of the main pipeline for receiving the lining in the elbow pipe;
the radial portion of the elbow pipe receiving the collar portion of the lining with the tubular portion of the lining extending within the elbow pipe;
and a sealing member at the longitudinal end of the elbow pipe, the sealing member having at least one opening;
fluid pressure means connected to the interior of the elbow means for evening the lining through the collar; and expandable bladder means about the elbow surrounding the shoulder and opening in the elbow pipe with means to inflate and expand the bladder means coupled thereto, whereby upon locating the lateral position along the main pipeline and aligning the opening in the radial portion of the elbow pipe with the lateral, the bladder means is inflated to fix position of the apparatus and press the collar against the surface of the pipeline and tubular portion of the lining is everted through the collar and holds the tubular portion of the lining in position against the interior of the lateral until the resin cures.
the tubular lining includes a substantially hollow tubular portion formed of a sealed envelope of resin impregnable layer and a resin impregnable flange-like collar bonded to one end of the tubular portion, comprising:
a hollow elbow pipe formed with a radial portion having an opening facing the lateral and a longitudinal portion extending along the axis of the main pipeline for receiving the lining in the elbow pipe;
the radial portion of the elbow pipe receiving the collar portion of the lining with the tubular portion of the lining extending within the elbow pipe;
and a sealing member at the longitudinal end of the elbow pipe, the sealing member having at least one opening;
fluid pressure means connected to the interior of the elbow means for evening the lining through the collar; and expandable bladder means about the elbow surrounding the shoulder and opening in the elbow pipe with means to inflate and expand the bladder means coupled thereto, whereby upon locating the lateral position along the main pipeline and aligning the opening in the radial portion of the elbow pipe with the lateral, the bladder means is inflated to fix position of the apparatus and press the collar against the surface of the pipeline and tubular portion of the lining is everted through the collar and holds the tubular portion of the lining in position against the interior of the lateral until the resin cures.
29. The apparatus of Claim 28, further including:
a hollow containment tube;
the containment tube extending from the elbow pipe; and the sealing member having an opening for applying pressure to the interior of the containment tube.
a hollow containment tube;
the containment tube extending from the elbow pipe; and the sealing member having an opening for applying pressure to the interior of the containment tube.
30. The apparatus of Claim 28, further including:
a hollow carrier tube connected to the radial portion of the elbow pipe and being sealed;
whereby the lining tube can be disposed within the carrier tube.
a hollow carrier tube connected to the radial portion of the elbow pipe and being sealed;
whereby the lining tube can be disposed within the carrier tube.
31. The apparatus of Claim 28, wherein:
the sealing member is a sealing disc having at least one opening therethrough.
the sealing member is a sealing disc having at least one opening therethrough.
32. The apparatus of Claim 29, wherein:
the sealing member is a sealing disc having the at least one access opening.
the sealing member is a sealing disc having the at least one access opening.
33. The apparatus of Claim 29, further including:
a pressure hose for introducing pressurized fluid into a cavity between the flexible lining and the elbow pipe.
a pressure hose for introducing pressurized fluid into a cavity between the flexible lining and the elbow pipe.
34. The apparatus of Claim 33, wherein:
the pressure hose is slidably mounted thereto.
the pressure hose is slidably mounted thereto.
35. The apparatus of Claim 30, further including:
a pressure hose communicating with the access opening in the sealing member for introducing pressurized fluid between the carrier tube and the elbow pipe.
a pressure hose communicating with the access opening in the sealing member for introducing pressurized fluid between the carrier tube and the elbow pipe.
36. The apparatus of Claim 33, wherein:
the sealing member is a sealing disk having at least one opening therethrough.
the sealing member is a sealing disk having at least one opening therethrough.
37. The apparatus of Claim 29, further including:
a second opening in the sealing member;
a bleed hose sealing and slidably disposed through the second opening in the sealing member with the proximal end of the lining closed around the distal end portion of the bleed hose, whereby the distal end portion of the bleed hose projects distally from the lining when the lining is everted into the lateral for removing any liquid collecting in the lateral pipe.
a second opening in the sealing member;
a bleed hose sealing and slidably disposed through the second opening in the sealing member with the proximal end of the lining closed around the distal end portion of the bleed hose, whereby the distal end portion of the bleed hose projects distally from the lining when the lining is everted into the lateral for removing any liquid collecting in the lateral pipe.
38. The apparatus of Claim 30, further including:
a second opening in the sealing member;
a bleed hose sealing and slidably disposed through the second opening in the sealing member with the proximal end of the carrier tube closed around the distal end portion of the bleed hose, whereby the distal end portion of the bleed hose projects distally from the carrier tube and lining when the lining is everted into the lateral for removing any liquid collecting, in the lateral pipe.
a second opening in the sealing member;
a bleed hose sealing and slidably disposed through the second opening in the sealing member with the proximal end of the carrier tube closed around the distal end portion of the bleed hose, whereby the distal end portion of the bleed hose projects distally from the carrier tube and lining when the lining is everted into the lateral for removing any liquid collecting, in the lateral pipe.
39. The apparatus of Claim 28, further including:
aperture means in the elbow pipe for pressurizing the expandable bladder when pressure is provided to the cavity in the elbow pipe.
aperture means in the elbow pipe for pressurizing the expandable bladder when pressure is provided to the cavity in the elbow pipe.
40. The apparatus of Claim 39, wherein:
the aperture means is adapted to provide lower pressure to the bladder means while providing higher pressure to the cavity for everting the liner through the radial portion of the elbow pipe once the bladder is fixed in position.
the aperture means is adapted to provide lower pressure to the bladder means while providing higher pressure to the cavity for everting the liner through the radial portion of the elbow pipe once the bladder is fixed in position.
41. The apparatus of Claim 37, further including:
apertures in the distal end portion of the bleed hose.
apertures in the distal end portion of the bleed hose.
42. The apparatus of Claim 34, wherein:
the pressure hose is affixed to the proximal end of the carrier tube.
the pressure hose is affixed to the proximal end of the carrier tube.
43. The apparatus of Claim 33, wherein:
the pressure hose is affixed to the proximal end of the lining.
the pressure hose is affixed to the proximal end of the lining.
44. The apparatus of Claim 29, wherein:
the sealing member is affixed to the proximal end of the containment tube for sealing the proximal end thereof, the sealing member including:
at least one access opening therethrough;
a pressure hose slidably mounted through the at least one opening end of the sealing member and connected to the proximal end of the lining tube for providing fluid pressure to the interior cavity formed by the containment tube and the lining; and a bleed hose slidably connected through the sealing member in the distal end thereof for removing fluid from the interior of the lateral.
the sealing member is affixed to the proximal end of the containment tube for sealing the proximal end thereof, the sealing member including:
at least one access opening therethrough;
a pressure hose slidably mounted through the at least one opening end of the sealing member and connected to the proximal end of the lining tube for providing fluid pressure to the interior cavity formed by the containment tube and the lining; and a bleed hose slidably connected through the sealing member in the distal end thereof for removing fluid from the interior of the lateral.
45. The apparatus of Claim 44, further including:
aperture means in the elbow pipe for pressurizing the expandable bladder when pressure is provided to the cavity in the elbow pipe.
aperture means in the elbow pipe for pressurizing the expandable bladder when pressure is provided to the cavity in the elbow pipe.
46. The apparatus of Claim 30, wherein:
the proximal end of the carrier tube is anchored about the opening in the radial portion of the elbow pipe, and the distal end of the carrier tube is sealed with a sealing member; and the carrier tube is located within and co-axial to the longitudinal portion of the elbow for receiving the tubular portion of the liner when the lining tube is shorter than the carrier tube.
the proximal end of the carrier tube is anchored about the opening in the radial portion of the elbow pipe, and the distal end of the carrier tube is sealed with a sealing member; and the carrier tube is located within and co-axial to the longitudinal portion of the elbow for receiving the tubular portion of the liner when the lining tube is shorter than the carrier tube.
47. The apparatus of Claim 46, further including:
a pressure hose slidably mounted through at least one opening end connected to the proximal end of the carrier tube for providing fluid pressure to the interior cavity formed by the carrier tube and the elbow pipe.
a pressure hose slidably mounted through at least one opening end connected to the proximal end of the carrier tube for providing fluid pressure to the interior cavity formed by the carrier tube and the elbow pipe.
48. An apparatus for inserting a flexible tubular lining into a lateral pipeline connected to a main pipeline from a remote location in the main pipeline wherein:
the tubular lining includes a substantially hollow tubular portion formed of a resin impregnable layer and an outer impermeable layer and a resin impregnable flange-like collar bonded to one end of the tubular portion, comprising:
a hollow elbow pipe having an opening facing the lateral and extending along the axis of the main pipeline for receiving the lining;
a radial portion of the elbow pipe for receiving the collar portion of the lining with the tubular portion of the lining extending within the elbow pipe and fluid pressure means connected to the interior of the elbow pipe for everting the lining through the collar; and expandable bladder means about the elbow surrounding opening in the elbow pipe with means to inflate and expand the bladder means coupled thereto, a hollow containment tube and a sealing member having an opening for applying pressure to the interior of the containment tube;
extending from the elbow pipe;
a hollow carrier tube;
connected to the elbow pipe and sealed; and a pressure hose communicating with the opening in the sealing member for introducing pressurized fluid between the carrier tube and the elbow pipe;
whereby upon locating the lateral position along the main pipeline and aligning the opening in the radial portion of the elbow pipe with the lateral, the bladder means is inflated to fix position of the apparatus and press the collar against the surface of the pipeline and tubular portion of the lining is everted through the collar and holds the tubular portion of the lining in position against the interior of the lateral until the resin cures.
the tubular lining includes a substantially hollow tubular portion formed of a resin impregnable layer and an outer impermeable layer and a resin impregnable flange-like collar bonded to one end of the tubular portion, comprising:
a hollow elbow pipe having an opening facing the lateral and extending along the axis of the main pipeline for receiving the lining;
a radial portion of the elbow pipe for receiving the collar portion of the lining with the tubular portion of the lining extending within the elbow pipe and fluid pressure means connected to the interior of the elbow pipe for everting the lining through the collar; and expandable bladder means about the elbow surrounding opening in the elbow pipe with means to inflate and expand the bladder means coupled thereto, a hollow containment tube and a sealing member having an opening for applying pressure to the interior of the containment tube;
extending from the elbow pipe;
a hollow carrier tube;
connected to the elbow pipe and sealed; and a pressure hose communicating with the opening in the sealing member for introducing pressurized fluid between the carrier tube and the elbow pipe;
whereby upon locating the lateral position along the main pipeline and aligning the opening in the radial portion of the elbow pipe with the lateral, the bladder means is inflated to fix position of the apparatus and press the collar against the surface of the pipeline and tubular portion of the lining is everted through the collar and holds the tubular portion of the lining in position against the interior of the lateral until the resin cures.
49. The apparatus of Claim 48, further including:
a second opening in the sealing member;
a bleed hose sealing and slidably disposed through the second opening in the sealing member with the proximal end of the carrier tube closed around the distal end portion of the bleed hose, whereby the distal end portion of the bleed hose projects distally from the carrier tube and lining as the lining is everted into the lateral for removing any liquid collecting in the lateral pipe.
a second opening in the sealing member;
a bleed hose sealing and slidably disposed through the second opening in the sealing member with the proximal end of the carrier tube closed around the distal end portion of the bleed hose, whereby the distal end portion of the bleed hose projects distally from the carrier tube and lining as the lining is everted into the lateral for removing any liquid collecting in the lateral pipe.
50. A method of lining a lateral pipe leading into a main pipe from the main pipe out, comprising:
providing a resin impregnated lateral lining tube of finite length and open ended having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, positioning the collar in the main pipe at the entrance to the lateral with the opening in the collar aligned with the lateral;
inserting the lateral lining tube into the lateral pipe using a fluid medium under pressure to evert the lateral lining tube through the opening in the collar, applying pressure to the lateral lining tube, applying pressure to the collar on the surface of the main pipe to urge the collar against the main pipe; and curing the resin in the lining tube and collar to form a seal at the location where the lateral meets the main pipe.
providing a resin impregnated lateral lining tube of finite length and open ended having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, positioning the collar in the main pipe at the entrance to the lateral with the opening in the collar aligned with the lateral;
inserting the lateral lining tube into the lateral pipe using a fluid medium under pressure to evert the lateral lining tube through the opening in the collar, applying pressure to the lateral lining tube, applying pressure to the collar on the surface of the main pipe to urge the collar against the main pipe; and curing the resin in the lining tube and collar to form a seal at the location where the lateral meets the main pipe.
51. The method according to claim 50, wherein the seal is formed by an inflatable means, said means being inflated by the fluid medium used for inserting the lateral lining, but at a lower pressure.
52. The method according to claim 50, wherein the fluid medium is supplied to insert the lateral lining, by means of a pressure pipe, and at least one additional pressure pipe extends past the seal arrangement so that pressure fluid can be applied to another lateral lining remote from the first mentioned lateral whilst curing of the first mentioned lateral lining is taking place.
53. The method according to claim 51, wherein the inflatable means comprises a bag or bladder which is inflated against the main pipe surface.
54. The method according to claim 53, wherein the bag or bladder is in the form of a pair of spaced diametrically opposed inflatable pillows.
55. A method of lining a lateral pipe leading into a main pipe, comprising:
providing a resin impregnated lateral lining tube of finite length and open ended and having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, inserting the lateral lining tube into the lateral pipe using a fluid medium under pressure to evert the tube through the opening in the collar with the collar at the entrance to the lateral with the opening in the collar aligned with the lateral, applying pressure to the lateral lining tube to urge the lining tube against the lateral, applying pressure to the collar on the surface of the main pipe to urge the collar against the main pipe; and curing the resin in the lining and collar to form a seal at the location where the lateral meets the main pipe.
providing a resin impregnated lateral lining tube of finite length and open ended and having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, inserting the lateral lining tube into the lateral pipe using a fluid medium under pressure to evert the tube through the opening in the collar with the collar at the entrance to the lateral with the opening in the collar aligned with the lateral, applying pressure to the lateral lining tube to urge the lining tube against the lateral, applying pressure to the collar on the surface of the main pipe to urge the collar against the main pipe; and curing the resin in the lining and collar to form a seal at the location where the lateral meets the main pipe.
56. The method according to claim 55, including applying pressure to the collar by an inflatable means which is a bag or bladder.
57. The method according to claim 56, including pressing the collar against the main pipe by the inflatable means connected to an elbow pipe and inverting the lateral lining through the elbow pipe into the lateral.
58. A method to claim 55, wherein the seal is formed by use of an elbow pipe to position the lateral lining at the entrance to the lateral and through which the lateral lining is everted to be inserted into the lateral.
59. The method according to claim 55, wherein the seal is formed by an inflatable means, said means being inflated by the fluid medium used for inserting the lateral lining, but at a lower pressure.
60. The method according to claim 55, wherein the fluid medium is supplied to insert the lateral lining, by means of a pressure pipe, and at least one additional pressure pipe extends past a seal arrangement so that pressure fluid can be applied to another lateral lining remote from the first mentioned lateral whilst curing of the first mentioned lateral lining is taking place.
61. The method according to claim 59, wherein the inflatable means comprises a bag or bladder which is inflated against the main pipe surface.
62. The method according to claim 61, wherein the bag or bladder is in the form of a pair of spaced diametrically opposed inflatable pillows.
63. The method according to claim 50, including applying pressure to the collar by an inflatable means which is a bag or bladder.
64. The method according to claim 63, including pressing the collar against the main pipe by the inflatable means connected to an elbow pipe and inverting the lateral lining through the elbow pipe into the lateral.
65. A method according to claim 50, wherein the seal is formed by the use of an elbow pipe to position the collar at the entrance to the lateral and through which the lateral lining is inverted to be inserted into the lateral.
66. The method according to claim 50, wherein the step of curing includes circulating at least one of hot water, steam, hot air or mixtures thereof into the lining tube.
67. The method according to claim 50, wherein the step of applying pressure includes at least applying one of pressurized water and gas.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909009073A GB9009073D0 (en) | 1990-04-23 | 1990-04-23 | Improvements relating to the lining of pipelines or passageways |
| GB9009073.9 | 1990-04-23 | ||
| PCT/GB1991/000628 WO1991016568A1 (en) | 1990-04-23 | 1991-04-22 | Improvements relating to the lining of pipelines or passageways |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2079335A1 CA2079335A1 (en) | 1991-10-24 |
| CA2079335C true CA2079335C (en) | 2006-06-27 |
Family
ID=26296975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002079335A Expired - Lifetime CA2079335C (en) | 1990-04-23 | 1991-04-22 | Installation of lateral linings from the main pipeline out |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2079335C (en) |
| NO (1) | NO924033L (en) |
-
1991
- 1991-04-22 CA CA002079335A patent/CA2079335C/en not_active Expired - Lifetime
-
1992
- 1992-10-19 NO NO92924033A patent/NO924033L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO924033D0 (en) | 1992-10-19 |
| NO924033L (en) | 1992-10-19 |
| CA2079335A1 (en) | 1991-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5975878A (en) | Apparatus for installation of lining with sealing collar | |
| US6899832B2 (en) | Installation of flexible lining with flexible collar for lining lateral pipelines | |
| US5927341A (en) | Lining of "Tees" and "Wyes" in pipelines or passageways | |
| US6619886B1 (en) | System and method for installing formed-in-situ localized repair of pipes and conduits | |
| JPH07504016A (en) | Improvements related to lining of pipes or channels | |
| JP2544839B2 (en) | Method of repairing a conduit and apparatus used for the method | |
| US6354330B1 (en) | Lining of pipelines with a flexible lining including a heat curable resin by curling in stages | |
| US4442053A (en) | Method of and apparatus for repairing a leak in a pipe or pipeline | |
| WO1989008218A1 (en) | Method and device for renovating a duct system | |
| US9523457B2 (en) | Apparatus and method for heat curing of pipe liners | |
| CA2079335C (en) | Installation of lateral linings from the main pipeline out | |
| EP0850381A1 (en) | Pipe rehabilitation | |
| JPH0926081A (en) | Pipe branch part repairing device | |
| US7661443B1 (en) | Point repair sleeve carrier for conduits | |
| JPH0715315B2 (en) | Subsea pipeline repair method and device | |
| WO1992021909A1 (en) | Deformation device for deforming a sealing element made of plastics material fitted in a pipe | |
| EP0632874A4 (en) | Pipeline repair apparatus including expandable forms. | |
| AU737147B2 (en) | System for the formed-in-situ localised repair of pipes and conduits | |
| JPH0926082A (en) | Method and device for repairing pipe branch part | |
| AU698461B2 (en) | Pipe rehabilitation | |
| AU2009212816A1 (en) | Method and Apparatus for the In-situ Repair of Junction Zones in Conduits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |