JP2007071349A - Lead-in repairing method for mounting pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe line repairing method for reducing man-hours up to completing repair even when the number of mounting pipes to be repaired is increased. <P>SOLUTION: The repairing method uses a collared repairing material 1 having a collar 5 fixed to one end of a cylindrical body 3 impregnated with a hardening resin for repairing the plurality of mounting pipes 110 (111, 112) branching from a main pipe 100 together with branch portions 120 through a lead-in process for exposing the collar portion 5 toward the main pipe 100 in the state of fitting the body 3 into the mounting pipe 110 and leading the collar portion 5 to cover the branch portions 120 between the main pipe 100 and the mounting pipe 110. For the collared repairing material 1, a thrust hardening means 25 is used which hardens the collared repairing material 1 having an adhesive layer 6 and the plurality of collar portions 5 while thrusting them toward a main pipe inner wall 100a at the same time. It hardens the plurality of collar portions 5 while thrusting them in parallel at the same time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for repairing a mounting pipe attached to an opening of a main pipe.

  Drainage facilities such as sewage systems and distribution pipes in each household are connected to a main pipe buried in the ground from a mounting pipe through a public fence. If such a mounting pipe is aged or damaged, it may cause problems such as water leakage or water ingress, so it must be repaired, but this mounting pipe must be repaired not only on the inner wall surface of the mounting pipe but also on the mounting pipe and main pipe. Repair of the connecting part (branch part from the main) is also necessary.

  Various repair methods using a repair material with a hook (hereinafter referred to as a hook repair material) have been proposed as such pipe repair materials (see, for example, Patent Documents 1 to 4).

  For example, Patent Literature 1 discloses a flange repair material having a cylindrical sleeve and a flange portion (a flange portion) formed at one end portion of the sleeve. A chemical chamber filled with a water-stopping material is formed inside the collar portion of the brazing repair material. Due to the force applied by a special pressing device, the chemical chamber is destroyed and the water-stopping material inside is jetted to the branch portion of the pipe to repair the branch portion.

  In Patent Document 2, a brazing repair material provided with a collar portion at one end of a cylindrical felt impregnated with a resin between plastic films, and the collar portion of the brazing repair material on the inner wall of the main pipe at the periphery of the branching portion. A special pressing device that presses toward is disclosed. This pressing device includes a curved metal plate (pressing plate) for pressing the collar portion toward the inner wall of the main pipe. After pulling the brazing repair material from the main pipe side into the mounting pipe, the flange is brought into contact with the peripheral edge of the branch part, and the pressing plate (metal plate) is pressed toward the inner wall of the pipe to impregnate the resin impregnated in the felt. It is cured. Such a special pressing plate is usually driven by hydraulic pressure, a pneumatic cylinder, or electric drive.

  Patent Document 3 discloses a brazing repair material having a non-woven body portion impregnated with a curable resin. In this repair material, the main body made of nonwoven fabric is inverted and inserted into the attachment tube, and the collar portion is positioned while moving the pressing jig (special pressing device). The body portion made of non-woven fabric is hardened in a state where the positioned collar portion is pressed against the connecting portion of the attachment tube and is securely adhered.

  Patent Document 4 discloses a tacky repair material provided with a cylindrical main body part impregnated with a curable resin and a collar part fixed to one end of the main body part. The collar includes an FRP makeup exposed portion disposed on the center side of the pipeline, and an adhesive layer coated or impregnated with an adhesive layered on the pipeline inner wall side of the makeup exposed portion. Yes. A cylindrical impermeable inner tube whose tip is sealed is inserted into the main body.

Such a repair material is a drawing-in process in which the collar portion is exposed toward the main pipe while the main body portion is inserted into the mounting pipe, and the collar portion is drawn so as to cover the branch portion between the main pipe and the mounting pipe. , By expanding the inner tube diameter and pressing the collar part with a packer (special pressing device) through which hot water is circulated from the main pipe side, to the centering process to align the center of the collar with the center of the mounting pipe, to the packer and the inner tube Construction of repair materials is performed through a curing process in which warm water is circulated to cure the buttock and the main body.
Japanese Patent Laid-Open No. 7-35287 (Claims 1, 4 to 6) Japanese Patent Laying-Open No. 2003-35395 (Claim 1, Prior Art, FIG. 1, FIG. 2, FIG. 8) JP 2003-35393 A (paragraphs 0021 to 0022, FIGS. 1 to 3) Japanese Patent Laying-Open No. 2004-324739 (FIG. 5)

  However, in such a conventional construction, using a special pressing device suitable for each construction method, for each mounting pipe, a process for retracting the brazing repair material and a process for curing the repair material, respectively. Were carried out sequentially. In addition, in such a conventional repair method, even in the case of small-scale repairs, it takes about 2 hours of construction work per construction work of one mounting pipe, and therefore it faces a road with frequent traffic. There was a problem that the number of days until repair was completed was inevitable when the number of attachment pipes to be repaired increased.

  Then, this invention makes it a subject to provide the repair method of a pipe line which can reduce the man-hour until repair is completed even when the number of the attachment pipes which should be repaired increases.

  In order to achieve the above-mentioned problem, according to the study by the present inventors, since a long time is required for the curing process of the repair material, the curing process of the repair material is performed simultaneously on a plurality of attachment pipes. I thought that the above-mentioned problem could be solved if I could do it.

  Here, when using a special pressing device such as a conventionally used curved metal plate (pressing plate), each curved pressing plate is attached to each mounting tube. There is a problem that the apparatus becomes complicated, for example, it is necessary to arrange and drive each pressing plate.

  Therefore, when we examined the use of a pressing device that can equally press an unspecified wide area such as a pressure hose, for the material to be reversed and introduced from the main pipe to the mounting pipe side, the simultaneous curing method with the pressure hose is Since practical construction may be impossible or very difficult, the practicality is considered to be low.

  However, as a brazing repair material, a brazing repair material provided with an adhesive layer coated or impregnated with a curable adhesive for adhering the buttock to the inner wall of the pipe, and the plurality of ridges on the inner wall of the main pipe If the pressing means that presses simultaneously and the curing means that simultaneously cures the plurality of collars are used, the workability of the collar is significantly improved even if the plurality of collars are cured while pressing simultaneously. The present invention was reached.

That is, the present invention uses a brazing repair material including a cylindrical main body part impregnated with a curable resin and a flange part fixed to one end of the main body part, and the main body part is placed in a mounting pipe. In the inserted state, the hook part is exposed toward the main pipe, and a plurality of mounting pipes branched from the main pipe through a drawing process in which the hook part covers the branch part of the main pipe and the mounting pipe are branched. When repairing with
As the brazing repair material, a brazing repair material provided with an adhesive layer coated or impregnated with a curable adhesive for adhering the brim to the inner wall of the pipe, and the plural ribs facing the inner wall of the main pipe And pressing means for simultaneously pressing and a curing means for simultaneously curing the plurality of flanges, and in the pulling-in step, the adhesive layer of the flanges is brought into contact with the inner wall of the main part of the branch part, while being attached to the attachment pipe of the main body part. By carrying out the operation of performing the pull-in position alignment a plurality of times, the respective brazing repair materials are drawn into the plurality of mounting pipes, and are cured while being pressed against the plurality of flanges simultaneously. This is a pipeline repair method.

  According to the present invention, as the brazing repair material, a configuration using a brazing repair material provided with an adhesive layer coated or impregnated with a curable adhesive for bonding the brim portion to the inner wall of the pipe line, and a drawing step Then, by fixing the main body part with respect to the mounting pipe while the adhesive layer of the collar part is in contact with the inner wall of the branch part, a plurality of mounting repair materials for the mounting pipes are performed. Since the construction contractor is employed, even when an unskilled construction contractor presses and cures the plurality of buttocks simultaneously in parallel, the occurrence of poor construction of the buttock is reduced.

  Thereby, according to this invention, even when the number of the attachment pipes which should be repaired increases, the repair method of a pipe line which can reduce the man-hour until repair is completed can be provided.

  Here, as the pressing means, a pressing device capable of pressing an unspecified wide area equally is preferable, for example, an inflatable cylindrical member such as a pressure hose having the same diameter as the pipe diameter or a small diameter. In general, the installation position of the mounting pipe relative to the main pipe varies depending on the circumstances of each household, road conditions, and the like. On the other hand, such a pressure hose can be easily expanded by filling a fluid such as liquid or gas inside, and the length is set to a length across a plurality of mounting pipes. Thus, even if the mounting positions of the respective mounting pipes are different, they can be equally pressed in parallel.

  In addition, when a thermosetting adhesive is selected as the curable adhesive impregnated or applied to such a collar part, it is preferable to use a heating means as the curing means. Such a heating means can be easily obtained by circulating hot water, steam and / or heated gas inside the inflatable cylindrical member as the pressing means.

  Thus, for example, by circulating hot water or steam inside a cylindrical pressure hose that expands along the inner wall of the pipeline, pressing and heat-curing can be performed simultaneously and in one way, thereby managing pressure-curing. Can be centralized, and construction man-hours can be drastically reduced.

  For example, if the adhesive used for the buttock is a photo-curable adhesive, a light source is arranged in the inflatable cylinder while selecting and pressing a transparent inflatable cylinder as the pressing means. Thus, pressing and curing can be performed at the same time.

  In any case, if an expanded tubular body having a length that can be simultaneously pressed against a plurality of collars to be cured, for example, a length of about 3 m to 4 m is used as the pressing means, the length is within this range. Can be pressed simultaneously.

  Thereby, according to this invention, since the hardening process performed separately can be performed simultaneously, for example, in the repair of 4 places, the repair time conventionally required about 8 to 10 hours is 3 to 4 It can be completed in about an hour.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  First, FIG. 1 is a diagram illustrating a pipeline as a repair target. In FIG. 1, pipelines to be repaired are a plurality of mounting pipes 110 (111, 112) branched from a main pipe 100 connecting two adjacent manholes (manhole 101 and manhole 102). . Here, for the sake of convenience, the attachment pipe 110 is shown with two attachment pipes 111 and 112, but this number may be three or four or more.

  The branch portion 120 of the main pipe 100 and each mounting pipe 110 is formed by inserting the end of the mounting pipe 110 into a through hole drilled in the main pipe 100 and bonding the periphery at a construction site using a mortar or the like. It has been made. These mounting pipes 110 are connected to drainage facilities such as sewers and water distribution pipes such as households via public pits 115. However, if the mounting pipes 110 are worn out or damaged, water leakage or water intrusion occurs. It will need to be repaired. Repair of these attachment pipes 110 requires repair of not only the inner wall surface 110a of the attachment pipe 110 but also the connection part (branch part 120) between the attachment pipe 110 and the main pipe 100. In such a case, a brazing repair material is used, but the purpose of using the brazing repair material is not limited to this example in the present invention.

  Here, in the repair method according to this embodiment, two manholes 101 and 102 arranged with the attachment pipes 111 and 112 interposed therebetween are used. A necessary number of brazing repair materials are prepared near one manhole 101.

  This brazed repair material includes a cylindrical main body part impregnated with a curable resin, and a collar part fixed to one end of the main body part, and the collar part is hardened to adhere to the inner wall of the pipeline. Adhesive is applied or impregnated.

  As shown in FIGS. 2 and 3, an example of such a brazing repair material is foldable in which a cylindrical fibrous base material layer 2 formed into a cylindrical shape for impregnating a curable resin is laminated. The main body part 3 and one end of the main body part 3 (hereinafter, this one end is referred to as the tip 4) are provided with a hook part 5 fixed in a hook shape (flange shape). Here, the main body portion 3 is omitted in the longitudinal direction and is drawn in a cylindrical shape. However, the main body portion 3 is a long and flexible body and can be folded or wound on a reel or the like. Stored. This facilitates storage in a factory or the like, transfer from the factory to a construction site, and the like. In addition, at the construction site, it can be arranged on a bent pipeline.

  The eaves part 5 includes, for example, an eaves-like fibrous base material layer (adhesive layer) 6 impregnated or coated with a curable adhesive, and eaves-like thin plates 7 formed of a rigid shape-retaining material formed in an eaves shape. The adhesive layer 6 and the bowl-shaped thin plate 7 are fixed by an adhesive (not shown) or the like.

  Moreover, in this brazing repair material 1, the fibrous base material layer 2 which comprises the main-body part 3 is impregnated with curable resins, such as an epoxy resin. Further, an inner layer 8 composed of an impermeable film such as a polyurethane film is adhered to the inside of the fibrous base material layer 2 so that monomers contained in the curable resin are not scattered, The outer side of the material layer 2 is covered with an outer film 9 made of a cylindrical impermeable film.

  The brazing repair material 1 having such a configuration can be produced from, for example, a brazing repair material 1 ′ as shown in FIG.

  Here, the brazing repair material 1 ′ includes a cylindrical fibrous base material layer 2 formed in a cylindrical shape from a fibrous base material having an impermeable film such as a polyurethane film bonded to the outside, and the cylindrical fibrous material. It is generally composed of a flange 5 fixed to one end (terminal 4) of the base material layer 2.

  The flange portion 5 includes a flange-shaped fibrous base material (hook-like fibrous base material layer 6) fixed to the tubular fibrous base material layer 2 by sewing or the like, and the hook-like fibrous base material layer 6. It is comprised from the eaves-like thin plate 7 fixed to the inner side (the main-body part 3 side) with the adhesive agent etc.

  Since this saddle-shaped thin plate 7 is a portion exposed to the inner surface of the main pipe after construction, it is preferably formed from a hard material that does not generate wrinkles. Examples of such a hard material include a hard resin molding material such as FRP, but may be a rigid plate made of metal such as an aluminum alloy. Here, when the bowl-like thin plate 7 is formed of a rigid material such as a plate, the bowl-like thin plate 7 has a shape along the inner wall shape of the main pipe (for example, the inner wall shape of the main pipe having a circular cross section). It is preferable that the cross section along the arc shape.

  Moreover, the bowl-shaped member 7 may be formed from a hard shape-retaining material. Here, the hard shape-retaining material has shape retention due to its high bending elastic modulus, but has elasticity enough to follow the inner shape of the main pipe during construction. As such a hard shape-retaining material, for example, when selecting FRP (fiber reinforced plastic) whose bending elastic modulus is adjusted within the range of 10,000 to 15,000 MPa, it is possible to construct while maintaining a preferable heel shape. Sometimes it is most suitable because it easily follows the shape of the inner surface of the main pipe.

  Moreover, as a modification of such a hook-shaped member 7, the hook-shaped member 7 is formed so as to be foldable. Since the hook-shaped member 7 is formed so as to be foldable, the hook-shaped member 7 is folded at the time of construction and introduced into the pipeline, and the folded-up hook-shaped member 7 is pushed up when attached to the mounting pipe. Such a foldable bowl-shaped member 7 is disclosed in Japanese Patent Application No. 2005-136151 “Repair Material” as a material having a feature that the bowl-shaped member 7 can be constructed without interfering with a pipe or the like. And a retraction repair method using the same ".

  Since such a brazing repair material 1 'is not impregnated with a curable resin, it can be folded or wound up on a reel or the like and stored for a long period of time. Produced and stored for stock.

  In the brazing repair material 1 ′, the cylindrical fibrous base material layer 2 in the main body 3 is impregnated with a curable resin at a factory or a construction site. Subsequently, the main body 3 is passed through the flange 5 and reversed. Thereby, the cylindrical fibrous base material layer 2 impregnated with the curable resin is exposed on the outer surface. Finally, by covering the outer periphery of the exposed tubular fibrous base material layer 2 with the outer film 9, the brazed repair material 1 shown in FIG. 2 or FIG. 3 is obtained.

  The adhesive layer 6 is coated or impregnated with a curable adhesive at an appropriate stage. As a result, the surface of the adhesive layer 6 is wetted and has adhesiveness to the main pipe inner wall surface 100a.

  As shown in FIG. 5, a suitable example of the brazing repair material 1 is a cylindrical impermeable molding tube (or inner tube) 11 in which a tip 11a is sealed inside the main body 3. Is inserted and configured. This inner tube 11 is an example of a known molding jig, and is peeled off after construction and discarded or reused. The inner tube 11 is configured to be hermetically sealed, whereby the inner tube 11 is configured to be expandable by supplying compressed air into the inner tube 11. For example, the inner tube 11 can be sealed at its end by an appropriate method such as cutting an annular film having both ends opened longer than the length of the brazing repair material 1 and folding the end to bind.

  Here, in this inner tube 11, a hot water circulation hose 12 (shown in FIGS. 7 and 8) for circulating hot water may be attached in the vicinity of the tube tip 11a. In this case, the base of the repair material 1b is configured so that a hot water circulation jig 13 (shown in FIG. 9) for enabling supply of hot water to the inside can be attached. Moreover, the outer surface of such a tube front-end | tip 11a protrudes slightly from the collar part 5, as shown in FIG.

  Although the arrangement | positioning method of such an inner tube 11 is not specifically limited, For example, it can insert by reversing by sending air into the inner tube 11 from the end of the brazing repair material 1. FIG.

  Next, an example of a construction example according to the present invention using the above-described brazed repair material 1 will be described. In the following construction examples, for convenience of explanation, an example using a thermosetting resin as the curable resin will be described.

  From the factory or the like, the brazing repair material 1 (or the brazing repair material 1 ′) is transported by a transport vehicle, a work vehicle, or the like. The brazing repair material 1 (or the brazing repair material 1 ′) has a predetermined diameter and a predetermined length in advance in consideration of the pipe diameter and length of the mounting pipe. Even when a thermosetting resin is selected as the curable resin or curable adhesive, impregnation or application of the curable resin or the curable adhesive can be performed at a factory or the like by using a cold car or the like. . In the case of using a photo-curable curable resin or a curable adhesive, if the light is blocked, a cold car is unnecessary. In addition, in the case where the brazing repair material 1 ′ not impregnated or coated with resin or the like is used, impregnation with curable resin or curable adhesive, application, folding and temporary fixing of the ridge-like thin plate 7 are performed at the construction site. Done. Thereby, the brazing repair material 1 impregnated or provided with a curable resin and a curable adhesive is prepared.

  Next, as shown in FIG. 6, in the repair method according to this embodiment, two manholes 101 and 102 arranged with the attachment pipes 111 and 112 interposed therebetween are used. A work vehicle 14 equipped with a television monitor or the like is disposed in the vicinity of one manhole 101.

On the other hand, when the brazing repair material 1 is introduced, a self-propelled camera car 17 that is connected to the auxiliary jig 15 for facilitating the pull-in and positioning, the work vehicle 14 and the cable 16 or the like is used. In the auxiliary jig 15, a travelable vehicle body 18 and a pair of arms 19 protrude from the tip of the vehicle body 18, and a guide roller 20 is provided between the arms 19. Thus, a guide portion surrounded by the arm 19 and the guide roller 20 is formed. The auxiliary jig 15 may be self-propelled, but in this example, the auxiliary jig 15 can freely travel in the pipeline 100 by towing back and forth with the towing wires 21 and 22.
[Retraction process for brazing repair materials]
Next, the drawing-in process of the brazing repair material 1 using such an auxiliary jig 15 will be described with reference to FIG. Note that, in order to observe the pull-in state and the like, the camera car 17 is appropriately moved to a position, and the ground work vehicle 14 monitors the video of the camera as necessary.

  First, the rope 23 is fixed to the repair material base 1b. As shown in FIG. 6, the rope 23 is inserted into the guide portion from the lower side of the guide roller 20 of the auxiliary jig 15 introduced into the main pipe 100, passes through the attachment pipe 111 to be repaired, and passes through the public pipe. It is wound up by a winch 24 placed on 115.

  While adjusting the position of the guide roller 20 by operating the pulling wires 21 and 22 attached to the front and rear of the auxiliary jig 15 so that the pull-in resistance of the main body 3 is reduced, the main body 3 is attached to the attachment tube from the end. Pull into 111.

Next, while pulling the rope 23 and the pulling wires 21 and 22, the guide roller 20 is used to insert the body portion 3 from the base portion 1 b through the guide portion 20 and completely pass through the guide portion 5. As shown in FIG. 7, the rough alignment is performed until the central axis of the flange portion 5 reaches a predetermined position near the central axis of the branch portion 120. In this state, there is a wide air layer 130 between the outer surface of the main body 3 and the inner wall surface 110 a of the attachment tube 110. In addition, since the adhesive layer 6 is disposed on the inner wall surface 110a side of the flange portion 5, the rough alignment is performed until the central axis of the flange portion 5 reaches a predetermined position near the central axis of the branch portion 120. The rough position of the collar portion 5 can be fixed by the slight adhesiveness of the adhesive layer 6.
[Centering process for brazing repair materials]
Next, the centering process of the pulled-in repairing material 1 with a flange will be described.

  The centering step refers to the state in which the center axis of the flange portion 5 as shown in FIG. 7 is roughly aligned, and the center axis of the flange portion 5 and the main body portion 3 as shown in FIG. This is a step of shifting to a state in which the mounting tube 110 is accurately aligned with the central axis. Prior to centering, a hot water circulation jig 13 having an air introduction device is attached to the base of the inner tube 11 (see FIG. 9).

Next, as shown in FIGS. 7 and 8, compressed air is introduced into the inner tube 11 through the hot water circulation jig 13. By increasing the pressure in the inner tube 11 to about 0.2 to 0.8 kgf / cm ² , the diameter of the inner tube 11 is expanded from the state of FIG. 7 to the state of FIG. 8, and the main body 3 is expanded. .

  In this state, the diameter of the inner tube 11 is expanded in a state in which the distal end portion 11a of the inner tube 11 protrudes slightly into the main pipe 100 from the flange portion 5, so that as shown in FIG. Center alignment about the axial direction of 111, 112 can be performed accurately.

Simultaneously with this diameter expansion, the main body 3 is pressed against the inner wall surface 110a of the mounting tube 111, air between the inner wall surface 110a and the main body 3 is discharged, and intrusion water such as water leaks into the inner wall surface 111a. If there is, these intrusion water will be drained cleanly.
[Repetition of drawing process and centering process]
After pulling the brazing repair material into the mounting tube 111 and centering, pulling the brazing repair material 1 into the mounting tube 112 and centering are performed in the same procedure. This process is repeated according to the number of attachment pipes. Thereby, the pull-in of the brazing repair material 1 is completed according to the number of the attachment pipes 110 to be repaired.
[Press hardening process]
Next, the press curing process will be described. This press hardening step is a step of pressing the flange portion 5 toward the inner wall surface 110a and curing the adhesive in a state where the flange portion 5 is pressed against the inner wall surface 100a in the vicinity of the branch portion 120. During this step, the curable resin of the main body 3 is simultaneously cured.

  As shown in FIG. 9, the pressure hose 25 is introduced into the main pipe 100 while being pulled by the wire 26. This pressure hose 25 is a flexible cylindrical body made of an impermeable film (laminate or the like) having heat resistance and reinforced strength, and a heating pressure medium such as hot water or steam inside. Is configured to circulate. In this example, the pressure hose 25 is connected to a boiler vehicle 28 parked near the exit of the manhole 102 via a hot water circulation hose 27. The boiler wheel 28 is connected to the hot water circulation jig 13 via the hot water circulation hose 30.

  Hot water is supplied to the pressure hose 25 from the boiler wheel 28 via the hot water circulation hose 27. Thereby, the diameter of the pressure hose 25 is expanded, and the inner wall surface 110a is pressed by the internal pressure. As a result, the brim 5 is heated while being pressed by the hot water circulating in the pressure hose 25 in accordance with the arrow a, and the adhesive layer 6 is cured while being pressed against the inner wall surface 110a. The hot water whose temperature has decreased is appropriately circulated to the boiler wheel 28 via the hot water circulation hose 27, and after the temperature has been raised by the boiler (not shown), it is supplied again into the pressure hose 25 via the hot water circulation hose 27. The

  On the other hand, by circulating hot water through the hot water circulation hose 30, the main body 3 is pressed and heated while expanding the diameter of the inner tube 11 to cure the thermosetting resin of the main body 3.

  For example, if hot water of about 80 ° C. is circulated as the hot water, the curing time required for curing the heel part 5 and the main body part 3 may be about 1 hour. After the heat curing, the hot water is cooled, the inner tube 11 and the pressure hose 25 are removed, and the operation is generally completed.

  Thereby, the pressing of the collar part 5 and the main body part 3 and the heat curing can be performed simultaneously by one means, the management of the pressure curing can be unified, and the construction man-hour can be drastically reduced.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change or the like without departing from the gist of the present invention. included.

  For example, in the above description, the pull-in method using the auxiliary jig 15 and the camera car 17 for facilitating the pull-in is described. However, in the present invention, these auxiliary jigs are not necessarily used.

  The auxiliary jig 15 is formed in a ring shape with a pair of arms and a guide roller. However, the shape of the auxiliary jig is arbitrary as long as the brazing repair material 1 can be guided into the mounting tube 110 from the base 1b. . For example, the guide part of the auxiliary jig does not have to be a perfect ring shape, and may be an auxiliary jig provided with a U-shaped guide part, for example.

  Moreover, if a light-transmitting tube is used as the forming tube, light can be irradiated toward the repair material for drawing through the forming tube. Thus, it goes without saying that the same effect can be expected even when a repair material for drawing in which a main body is impregnated with a photocurable resin is used instead of the thermosetting resin.

It is a cross-sectional view for demonstrating the pipe line as repair object which concerns on embodiment of this invention. It is a schematic diagram for demonstrating an example of the brazing repair material which concerns on embodiment of this invention. It is a schematic diagram for demonstrating an example of the brazing repair material which concerns on embodiment of this invention. It is a schematic diagram for demonstrating an example of the brazing repair material which concerns on embodiment of this invention. It is a schematic diagram for demonstrating an example of the brazing repair material which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the repair construction method which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the repair construction method which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the repair construction method which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the repair construction method which concerns on embodiment of this invention.

Explanation of symbols

1: Brazing repair material (repair material)
1b: Terminal (base)
2: Cylindrical fibrous base material layer (fibrous base material layer)
3: Body part 4: One end (tip)
5: collar part 6: bowl-like fibrous base material layer (adhesive layer)
7: A bowl-shaped thin plate (a bowl-shaped thin plate)
8: Impervious film (inner layer)
9: Cylindrical impermeable film (outer film)
11: Molding tube (inner tube)
11a: Tube tip 12: Hot water circulation hose 13: Hot water circulation jig 14: Work vehicle 15: Auxiliary jig 16: Cable 17: Camera car 18: Car body 19: Arm 20: Guide rollers 21, 22: Pulling wire 23 : Rope 24: winch 25: pressure hose (pressing device: pressing means, curing means)
26: Wire 27: Hot water circulation hose 28: Boiler car 30: Hot water circulation hose 100: Main pipe 100a: Inner wall surface 101: Manhole 102: Manhole 110 (111, 112): Installation pipe 115: Public fence 120: Branch 130: Air layer

Claims (3)

In a state where the main body portion is inserted into the mounting pipe using a brazing repair material provided with a cylindrical main body portion impregnated with a curable resin and a flange portion fixed to one end of the main body portion. When repairing a plurality of mounting pipes branched from the main pipe through a drawing process in which the buttock is exposed toward the main pipe and the buttock is pulled in so as to cover the branching section between the main pipe and the mounting pipe, together with the branching section,
As the brazing repair material, a brazing repair material provided with an adhesive layer coated or impregnated with a curable adhesive for adhering the brim to the inner wall of the pipe, and the plural ribs facing the inner wall of the main pipe Using a pressing means for simultaneously pressing and a curing means for simultaneously curing the plurality of flanges,
In the pulling-in step, each of the plurality of mounting pipes is performed by performing an operation of performing the pulling alignment with respect to the mounting pipe of the main body part a plurality of times while bringing the adhesive layer of the collar part into contact with the main pipe inner wall of the branch part. Pull in the brazing repair material,
A pipe repair method characterized by curing while simultaneously pressing against the plurality of flanges. The method for repairing a pipeline according to claim 1, wherein the pressing means is an inflatable cylindrical member having the same diameter as or a smaller diameter than the pipe diameter of the main pipe. The curable adhesive is a thermosetting adhesive,
The pipe repair method according to claim 2, wherein the flange is hardened while being pressed by circulating hot water, steam and / or heated gas inside the inflatable cylindrical member.

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