JP2020070901A - Pipe repair method and pipe repair member - Google Patents

Abstract

To repair a pipe properly without stopping circulation of water in the pipe.SOLUTION: A repair method of a pipe 1 includes: an outer pipe 14; an inner pipe 12; a filling member 16 provided between an outer periphery of the inner pipe 12 and an inner periphery of the outer pipe 14; a flange part 20 having a ring shaped flange fixing part 22 and a flange guard part 24 which extends from an inner periphery of the flange fixing part 22 and is inserted into a space between the outer periphery of the inner pipe 12 and the inner periphery of the outer pipe 14 from an end part 14A of the outer pipe 14 to push the filling member 16 into the opposite side of the end part 14A of the outer pipe 14. The repair method includes: a gap detection step in which a gap T existing between an inner periphery of the flange guard part 24 and the outer periphery of the inner pipe 12 is detected; an insertion step in which a repairing member 50 is inserted into the gap T if the gap T exists; and a fixing step in which the repairing member 50 is fixed to the flange part 20 in a state where the repairing member 50 is inserted into the gap T.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a pipe repair method and a pipe repair member.

  For example, in a hydroelectric power plant or the like, a water pressure pipe which is a pipe for conducting water is provided inside. This penstock may be connected to a joint which is an outer pipe having a larger diameter than the penstock. For example, in Patent Document 1, a small-diameter pipe that is a hydraulic pipe is inserted into a large-diameter pipe that is a joint, and a filling member is filled between the inner circumference of the large-diameter pipe and the outer circumference of the small-diameter pipe. It is described that it is fixed with a flange. As a result, the large diameter pipe and the small diameter pipe are connected to each other while being sealed by the filling member. Here, the penstock may leak water due to the widening of the gap between the penstock and the joint. Further, the filling member may protrude from the gap due to the water pressure. In such a case, water leakage cannot be stopped only by tightening the bolts that fix the flange. Therefore, in such a case, normally, after stopping the flow of water in the penstock and drawing out the water in the penstock, the filling tube and the like are replaced to repair the penstock and stop water leakage.

JP, 2007-321777, A

  However, when the flow of water in the penstock is stopped when the water leakage is stopped, the function of the equipment using the penstock is temporarily stopped, such as stopping the power generation of the hydraulic power plant. Therefore, for example, when water leaks, it is required to repair the penstock without stopping the flow of water in the penstock.

  In order to solve the above problems, it is an object of the present invention to provide a pipe repairing method and a pipe repairing member that appropriately repairs a pipe without stopping the flow of water in the pipe.

  In order to solve the above-mentioned problems and achieve the object, a method for repairing a pipe according to the present disclosure includes an outer pipe, an inner pipe inserted from the end portion of the outer pipe into the outer pipe, and the inner pipe. A filling member provided between the outer periphery of the outer pipe and the inner periphery of the outer pipe, a ring-shaped flange fixing portion, and extending from the inner periphery of the flange fixing portion, and the inner pipe from the end portion of the outer pipe. Is inserted between the outer periphery of the outer pipe and the inner periphery of the outer pipe, and a flange portion having a flange collar portion for pushing the filling member to the opposite side of the end portion of the outer pipe, and There is a gap detection step of detecting whether there is a gap between the inner circumference of the flange flange portion and the outer circumference of the inner pipe, and an insertion step of inserting a repair member into the gap when the gap is present. With the repair member inserted in the gap, the repair member is attached to the flange portion. It has a fixed step of constant, the.

  In the gap detecting step, water leakage occurs from the gap, and it is detected whether the filling member protrudes from the gap, and in the inserting step, the repair member is inserted into the gap to perform the repair. It is preferable that the filling member pushes the filling member into the gap to suppress water leakage from the gap.

  The repair member has a plate-shaped fixing portion and a collar portion extending from the fixing portion in a direction intersecting a surface of the fixing portion, and in the inserting step, the collar portion is provided in the gap. It is preferable that the fixing section is inserted and the fixing section is fixed to the surface of the flange fixing section in the fixing step.

  The fixing portion and the flange fixing portion are provided with an opening into which a bolt is inserted, and in the fixing step, by inserting the bolt into the opening of the fixing portion and the flange fixing portion, the repair member is provided. It is preferable to fix it.

  In the repair member, the fixing portion is an arc shape extending from one end portion to the other end portion, and the collar portion is between the one end portion and the other end portion of the fixing portion. A first end located and a second end located between the first end and the other end of the fixed part, extending along the inner circumference of the fixed part; The opening has a location between one end of the fixed portion and the first end of the collar portion, a location between the first end and the second end of the collar portion, and the collar portion. It is preferable to be provided at a location between the second end and the other end of the fixing portion.

  The outer pipe has an outer pipe flange portion facing the flange fixing portion and provided with an opening into which the bolt is inserted, and in the fixing step, the fixing portion, the flange fixing portion, and the outer pipe. It is preferable that the repair member is fixed by inserting the bolt into the opening of the flange portion and screwing a nut into the bolt.

  In the fixing step, it is preferable that the fixing portion and the outer pipe flange portion are further sandwiched by a sandwiching portion.

  In order to solve the problems described above and achieve the object, a repair member for a pipe of the present disclosure is an outer pipe, an inner pipe provided inside the outer pipe, an outer periphery of the inner pipe, and the outer pipe. A filling member provided between the inner circumference and a ring-shaped flange fixing section, and extending from the inner circumference of the flange fixing section and inserted between the outer circumference of the inner tube and the inner circumference of the outer tube. A fixing member which is a member for repairing a pipe having a flange portion having a flange collar portion and which is an arc-shaped member extending from one end portion to the other end portion and which can be fixed to the flange fixing portion. And a first end located between one end and the other end of the fixed part, and a second end located between the first end and the other end of the fixed part. Up to the portion, extending along the inner circumference of the fixed portion, a collar portion insertable between the outer circumference of the inner tube and the inner circumference of the outer tube, In the fixing portion, a portion between one end portion of the fixing portion and the first end portion of the collar portion, a portion between the first end portion and the second end portion of the collar portion, and An opening is provided at a position between the second end of the collar portion and the other end of the fixing portion and into which a bolt can be inserted.

  According to the present invention, the pipe can be appropriately repaired without stopping the flow of water in the pipe.

FIG. 1 is a schematic cross-sectional view of a tube according to this embodiment. FIG. 2 is a schematic view of the repair member according to this embodiment. FIG. 3 is a schematic diagram of the repair member according to the present embodiment. FIG. 4 is a schematic diagram illustrating a method for repairing a pipe according to this embodiment. FIG. 5 is a schematic diagram for explaining the pipe repair method according to the present embodiment. FIG. 6 is a schematic diagram for explaining the pipe repairing method according to the present embodiment. FIG. 7 is a schematic diagram for explaining the pipe repair method according to the present embodiment. FIG. 8 is a schematic diagram for explaining the pipe repairing method according to the present embodiment. FIG. 9 is a schematic diagram for explaining the pipe repairing method according to the present embodiment. FIG. 10 is a flowchart of the pipe repairing method according to the present embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to this embodiment, and when there are a plurality of embodiments, the present invention also includes those configured by combining the respective embodiments.

(Pipe structure)
FIG. 1 is a schematic cross-sectional view of a tube according to this embodiment. As shown in FIG. 1, the pipe 1 according to the present embodiment is a pipe in which inner pipes 10 and 12 are joined by an outer pipe 14. The pipe 1 is a pipe through which the water W is conducted, and in the present embodiment, the pipe 1 is a hydraulic pipe in which the pressure of the water W is higher than the atmospheric pressure (a hydraulic iron pipe in the present embodiment). In the present embodiment, the pipe 1 is a penstock used in a hydroelectric power plant, but its application is arbitrary. The present embodiment describes a repair method for suppressing the water leakage by repairing the pipe 1 when water leakage occurs in the pipe 1. Before describing the repair method, the configuration of the pipe 1 will be described.

  In the following, the extending direction of the tube 1, that is, the axial direction is referred to as the direction X. Therefore, the central axis AX of the tube 1 is along the direction X. Further, a direction along the direction X toward one side is defined as a direction X1, and a direction toward the other side, that is, a direction opposite to the direction X1 is defined as a direction X2. In addition, hereinafter, the vertical direction is referred to as a direction Z. A direction along the direction Z and toward one side is defined as a direction Z1, and a direction toward the other side, that is, a direction opposite to the direction Z1 is defined as a direction Z2. In the present embodiment, the direction Z1 is a vertically upward direction, that is, a direction away from the ground surface, and the direction Z2 is a vertically downward direction, that is, a direction toward the ground surface. In this embodiment, the direction X is along the horizontal direction and is orthogonal to the direction Z. However, the direction X, that is, the axial direction of the tube 1 is not limited to the direction orthogonal to the direction Z, and may be a direction intersecting the direction Z, and may be a direction along the direction Z.

  As shown in FIG. 1, the pipe 1 more specifically includes inner pipes 10 and 12, an outer pipe 14, a filling member 16, a flange portion 20, and a holding portion 21. The inner pipes 10 and 12 are pipes that extend along the direction X and circulate the water W inside, and are hydraulic pipes in the present embodiment. The inner pipe 10 and the inner pipe 12 are arranged in series along the direction X. More specifically, the inner pipe 10 is provided such that the end portion 10A on the direction X1 side faces the end portion 12A on the direction X2 side of the inner pipe 12 in the direction X while being separated. Since the inner pipe 10 and the inner pipe 12 are separated from each other in this way, the influence of deformation of the inner pipes 10 and 12 due to thermal expansion can be absorbed at the separated positions. In the present embodiment, the inner pipes 10 and 12 have an inner diameter of 60 cm or more and 2 m or less, and more preferably, the inner diameter of 60 cm or more and 1 m or less, but the inner diameter is arbitrary. Is. The inner pipe 10 and the inner pipe 12 have the same diameter, but may have different diameters. The inner pipes 10 and 12 are iron hydraulic iron pipes, but the material is arbitrary as long as they are metals.

  The outer tube 14 is a tube extending along the direction X from the end portion 14A on the direction X1 side to the end portion 14B on the direction X2 side. The outer pipe 14 has a larger diameter than the inner pipes 10 and 12, and the ends 10A and 12A of the inner pipes 10 and 12 are housed in the inner peripheral surface 14C. Further, the outer pipe 14 has an outer pipe flange portion 30 provided on the outer peripheral surface 14D. The outer pipe flange portion 30 is provided between the end portion 14A and the end portion 14B in the direction X, and extends from the outer peripheral surface 14D toward the outer side in the radial direction of the outer pipe 14. The outer pipe flange portion 30 is provided over the entire circumference of the outer pipe 14 in the circumferential direction. The outer pipe flange portion 30 is provided with an opening 30A penetrating from the surface on the direction X1 side to the surface on the direction X2 side. The plurality of openings 30A are provided along the circumferential direction of the outer pipe 14, and are provided at predetermined intervals over the entire circumference of the outer pipe flange portion 30 in the circumferential direction. A bolt 40 described later is inserted into the opening 30A. The radial direction of the outer tube 14 is a radial direction around the central axis AX of the outer tube 14, and the circumferential direction of the outer tube 14 is a circumferential direction around the central axis AX of the outer tube 14. Is. Further, the outer pipe 14 is made of the same material as the inner pipes 10 and 12 and made of metal (here, made of iron), but the material may be different. Further, the outer pipe 14 may extend in a direction different from that of the inner pipes 10 and 12, such as being curved.

  Further, the outer tube 14 is provided with a protrusion 32 on the inner peripheral surface 14C. The protruding portion 32 is provided between the end portion 14A and the end portion 14B in the direction X, and extends from the inner peripheral surface 14C toward the inner side in the radial direction of the outer tube 14 (the central axis AX side). ing. Further, the protrusion 32 is provided over the entire circumference of the outer tube 14 in the circumferential direction. The inner diameter of the protrusion 32 is larger than the outer diameter of the inner tube 12. The protrusion 32 holds the filling member 16 together with the flange collar 24 of the flange 20 described later.

  The outer pipe 14 is a joint that connects the inner pipe 10 and the inner pipe 12 by inserting the inner pipes 10 and 12 therein. More specifically, the outer pipe 14 positions the end portion 10A of the inner pipe 10 and the end portion 12A of the inner pipe 12 inside and separates the end portion 10A of the inner pipe 10 from the end portion 12A of the inner pipe 12. By holding it as it is, the inner pipe 10 and the inner pipe 12 are connected.

  The outer tube 14 has the end 10A of the inner tube 10 inserted therein, and is fixed to the inner tube 10 on the end 14B side. That is, the outer pipe 14 is fixed to the inner pipe 10 in a state where the end portion of the end portion 10A of the inner pipe 10 is inserted from the end portion 14B side. Since the outer pipe 14 and the inner pipe 10 are fixed in a sealed state, the water W in the pipe 1 (the inner pipes 10, 12 and the outer pipe 14) flows from between the outer pipe 14 and the inner pipe 10. It suppresses the leak. More specifically, the outer pipe 14 is fixed to the outer peripheral surface 10D of the inner pipe 10 via the mounting portion 15. The mounting portion 15 is, for example, a ring-shaped member that is larger than the diameter of the inner pipe 10 and smaller than the diameter of the outer pipe 14, and is attached to the outer peripheral surface 10D on the end 10A side of the inner pipe 10 and the end 14B side of the outer pipe 14. It is provided between the inner peripheral surface 14C. The outer pipe 14 is fixed to the inner pipe 10 and sealed by being welded to the inner pipe 10 via the mounting portion 15. The method of fixing the outer pipe 14 and the inner pipe 10 is not limited to this and is arbitrary. Further, in the present embodiment, since the water leakage between the outer pipe 14 and the inner pipe 12 is suppressed, the inner pipe 10 may not necessarily be provided.

  The outer pipe 14 is fixed to the inner pipe 12 via the filling member 16 and the flange portion 20. The filling member 16 is filled in the space S, which is a space between the outer peripheral surface 12D of the inner pipe 12 and the inner peripheral surface 14C of the outer pipe 14, to thereby form the pipe 1 (the inner pipes 10, 12 and the outer pipe 14). The water W inside is prevented from leaking out of the space S. The filling member 16 has a water blocking packing 17 and a grease cotton 18 located on the direction X2 side (the end 14A side of the outer tube 14) with respect to the water blocking packing 17. The water blocking packing 17 is a ring-shaped member extending over the entire circumference in the circumferential direction around the central axis AX, and is a polymer material such as resin or rubber. The grease cotton 18 is a ring-shaped member that extends over the entire circumference in the circumferential direction, which is the circumferential direction around the central axis AX, and is made of cotton that is braided into a cross-sectional angular diameter and grease-finished. It is packing. In other words, the grease cotton 18 is a member in which grease is impregnated into a cotton ring-shaped member. However, the filling member 16 may be made of any material as long as it can suppress water leakage by filling the space S, for example, a non-metallic material that is more easily deformed than the inner pipes 10, 12 and the outer pipe 14. I wish I had it.

  The flange portion 20 has a flange fixing portion 22 and a flange collar portion 24. The flange fixing portion 22 is a ring-shaped member and extends over the entire circumference in the circumferential direction, which is the circumferential direction around the central axis AX. The surface of the flange fixing portion 22 extends along a direction orthogonal to the direction X. Further, the flange fixing portion 22 is provided with an opening 22A that penetrates from the surface on the direction X1 side to the surface on the direction X2 side. A plurality of openings 22A are provided along the circumferential direction of the flange fixing portion 22, and are provided at predetermined intervals over the entire circumference of the flange fixing portion 22 in the circumferential direction. A bolt 40 described later is inserted into the opening 22A.

  The flange collar portion 24 extends from the inner peripheral portion 22B of the flange fixing portion 22 in a direction intersecting the surface of the flange fixing portion 22. Furthermore, the flange collar portion 24 extends in a direction orthogonal to the surface of the flange fixing portion 22, that is, in the direction X (axial direction). More specifically, the flange collar portion 24 extends along the direction X2 from the base end portion 24A connected to the inner peripheral portion 22B of the flange fixing portion 22 to the tip end portion 24B. Further, the flange collar portion 24 is provided in the inner peripheral portion 22B of the flange fixing portion 22 over the entire circumference in the circumferential direction of the flange fixing portion 22. Therefore, it can be said that the flange collar portion 24 is a tubular member. Further, the flange flange portion 24 has a tapered shape because the inner peripheral side of the tip end portion 24B is chamfered, but the shape of the tip end portion 24B is not limited thereto. The flange portion 20 is, for example, a member made of the same material as the inner pipes 10, 12 and the outer pipe 14, that is, iron, but may be any metal as long as it is metal.

  When connecting (fixing) the outer pipe 14 and the inner pipe 12, the end portion 12A of the inner pipe 12 is inserted into the outer pipe 14 from the end portion 14A side. Then, a space S extending in the circumferential direction is secured between the outer peripheral surface 12D of the inner pipe 12 and the inner peripheral surface 14C of the outer pipe 14, and the filling member 16 is inserted into the space S. The filling member 16 is arranged at a position where the water blocking packing 17 comes into contact with the surface of the outer tube 14 on the direction X1 side of the protrusion 32, and the grease cotton 18 is arranged on the direction X1 side of the water blocking packing 17. Then, the flange collar portion 24 of the flange portion 20 is inserted into the space S from the tip end portion 24B side. More specifically, the tip end portion 24B of the flange collar portion 24 is inserted from the end portion 14A of the outer pipe 14. Then, the flange portion 20 makes the flange fixing portion 22 face the outer pipe flange portion 30 of the outer pipe 14, and fixes the flange fixing portion 22 and the outer pipe flange portion 30 with the bolt 40. That is, the bolt 40 is inserted from the opening 22A to the opening 30A with the flange fixing portion 22 and the outer pipe flange portion 30 facing each other. Then, the nut 42 is fastened to the bolt 40 from the surface of the flange fixing portion 22 on the direction X1 side and the surface of the outer pipe flange portion 30 on the direction X2 side. The bolt 40 and the nut 42 are attached to each of the plurality of openings 22A and 30A. As a result, the flange portion 20 is fixed to the outer pipe 14 while exerting a force on the flange portion 20 in the direction X2. As a result, the tip end portion 24B of the flange collar portion 24 pushes the filling member 16, that is, the water blocking packing 17 and the grease cotton 18 toward the direction X2 side (the side opposite to the end portion 14A). The water blocking packing 17 and the grease cotton 18 are pushed into the front end portion 24B of the flange flange portion 24 in the direction X2 side, and are deformed while being sandwiched between the front end portion 24B and the protruding portion 32, and the outer peripheral surface of the inner pipe 12 is formed. The space S is closed by contacting the inner peripheral surface 14C of the outer tube 14 with the space 12D and filling the space S over the entire circumference in the circumferential direction. As a result, the space S is sealed and the water W inside the pipe 1 is suppressed from leaking to the outside through the space S.

  In this way, the outer pipe 14 and the inner pipe 12 are connected by the filling member 16 and the flange portion 20. That is, it can be said that the pipe 1 includes the outer pipe 14, the inner pipe 12 inserted into the outer pipe 14 from the end portion 14A of the outer pipe 14, the filling member 16, and the flange portion 20. The filling member 16 is provided in the space S between the outer peripheral surface 12D of the inner pipe 12 and the inner peripheral surface 14C of the outer pipe 14. The flange portion 20 has a ring-shaped flange fixing portion 22 and a flange collar portion 24. The flange collar portion 24 extends from the inner peripheral portion 22B of the flange fixing portion 22 and is inserted into the space S, so that the filling member 16 is placed on the side opposite to the end portion 14A of the outer tube 14 (direction X2 side). Push it in.

  The holding portion 21 is a pedestal that is attached to the outer peripheral surfaces 10D and 12D of the inner tubes 10 and 12 and holds the inner tubes 10 and 12, respectively. The inner tubes 10 and 12 are fixed to the holding portion 21, so that the deformation toward the direction Z2 side is suppressed.

  The tube 1 is configured as described above. In the tube 1, the inner tube 12 and the outer tube 14 are fixed by the flange portion 20 in a state where the space S is closed by the filling member 16. However, there is a case where the inner tube 12 and the outer tube 14 are displaced or deformed with the passage of time, and the space S expands and a gap T (see FIG. 4, which will be described later) occurs depending on the location. There are cases. When the gap T is generated in this manner, the watertightness of the filling member 16 is reduced, and the water W may leak from the gap T to the outside. Further, when the water W leaks, the water pressure acts on the filling member 16 and the space S may further expand, so that the filling member 16 (here, the grease cotton 18) is pushed to the direction X1 side by the water pressure. As a result, there is a case that the space S (gap T) is projected to the outside. If the filling member 16 protrudes to the outside of the space S (gap T), even if the bolt 40 is tightened further, the filling member 16 remains protruding, so that it is not possible to appropriately suppress water leakage. On the other hand, water leakage can be suppressed by performing repairs by replacing the filling member 16, but in this case, it is necessary to stop the conduction of the water W in the pipe 1 and discharge the water W remaining in the pipe 1. There is. In order to stop the conduction of the water W in the pipe 1, the function of the equipment using the pipe 1 (here, the hydroelectric power plant) is temporarily stopped. Considering the operation and cost of the equipment, it is preferable to repair the pipe 1 without stopping the conduction of the water W in the pipe 1 and temporarily stopping the function of the equipment using the pipe 1. .. In the present embodiment, when water leaks and the gap T is generated and the filling member 16 overflows, the pipe 1 is repaired by using a repairing member 50 described later. It is possible to suppress water leakage without stopping the conduction of the water W in the pipe 1. The repair method according to this embodiment will be described below. The repair method according to the present embodiment may be any method as long as the tube 1 is repaired when the gap T is generated, such as before leakage of water or when the filling member 16 does not stick out. However, when the gap T is generated, it can be applied.

(About repair material)
The repairing member 50 is used in the repairing method of the pipe 1 according to the present embodiment. 2 and 3 are schematic views of the repair member according to the present embodiment. FIG. 3 is a cross-sectional view of the repair member 50 as seen from the arrow A in FIG. As shown in FIGS. 2 and 3, the repairing member 50 has a fixing portion 52 and a collar portion 54. The repair member 50 is a metal fitting, that is, a metal member, and is made of iron in the present embodiment, but the material is arbitrary. However, since the repairing member 50 pushes the filling member 16, the repairing member 50 is preferably a member that is less likely to be deformed than the filling member 16.

  The fixing portion 52 is a plate-shaped member and has an arc shape. The arc shape refers to a shape in which a ring shape is partially cut off. In other words, the fixed portion 52 is a member extending from one end portion 52A to the other end portion 52B as shown in FIG. 2, and is curved from one end portion 52A to the other end portion 52B. Furthermore, it extends in an arc shape. Here, the circumferential direction around the central axis of the fixed portion 52 is the circumferential direction of the fixed portion 52. The central axis of the fixed portion 52 is a direction along the direction X0 orthogonal to the surface of the fixed portion 52. In this case, it can be said that the fixed portion 52 extends from one end portion 52A to the other end portion 52B along the circumferential direction of the fixed portion 52. Furthermore, the fixing portion 52 is not provided over the entire circumference in the circumferential direction of the fixing portion 52, and a part of the entire circumference in the circumferential direction of the fixing portion 52 from one end portion 52A to the other end portion 52B. It can be said that it is provided over. That is, the flange fixing portion 22 (see FIG. 1) is a ring-shaped member provided over the entire circumference in the circumferential direction, whereas the fixing portion 52 is an arc-shaped member provided over only a part of the entire circumference in the circumferential direction. Can be said to be a member of. Since the repair member 50 is attached to the pipe 1 from the direction X0 side, when attached to the pipe 1, the axial direction X0 is along the direction X2 (central axis AX) of the pipe 1.

  The fixed portion 52 is provided with a plurality of openings 60 penetrating from the surface of the fixed portion 52 on the direction X0 side to the surface on the opposite side of the direction X0. The openings 60 are provided at predetermined intervals in the circumferential direction of the fixed portion 52, that is, from one end portion 52A to the other end portion 52B. The opening 60 of the fixing portion 52 is the distance between the openings 22A of the flange fixing portion 22 (see FIG. 1) and the opening 30A of the outer pipe flange portion 30 (see FIG. 1), which are adjacent to each other in the circumferential direction, that is, The pitches are equal. In the example of FIG. 2, openings 60A, 60B1, 60B2, and 60C are provided as the openings 60. The openings 60A, 60B1, 60B2, 60C are provided in this order in the direction from the one end 52A to the other end 52B. However, the number of the openings 60 is not limited to four and is arbitrary, and is set according to the length from the one end portion 52A to the other end portion 52B. That is, since the pitch of the openings 60 is unified with the openings 22A of the flange fixing portion 22, for example, if the length from one end portion 52A to the other end portion 52B is long, the number of openings 60 increases. The bolt 40 is inserted into the opening 60 as described later.

  Here, the surface of the fixed portion 52 between the one end 52A and the opening 60 (here, the opening 60A) on the side of the one end 52A is referred to as a region 52F1. That is, the distance between the one end portion 52A and the opening 60A is maintained to some extent so that the area 52F1 is secured on the surface of the fixed portion 52. Similarly, the surface of the fixed portion 52 between the other end portion 52B and the opening 60 (here, the opening 60C) on the most other end portion 52B side is defined as a region 52F2. That is, the distance between the other end 52B and the opening 60C is maintained to some extent so that the area 52F2 is secured. A vise 70, which will be described later, is attached to the areas 52F1 and 52F2.

  Here, one side surface between the one end portion 52A and the other end portion 52B of the fixed portion 52 and the outer peripheral side surface of the fixed portion 52 is referred to as an outer peripheral portion 52C. The inner side surface of the fixed portion 52, which is the other side surface between the one end portion 52A and the other end portion 52B of the fixed portion 52, is the inner peripheral portion 52D. That is, the inner peripheral portion 52D is a portion inside the fixed portion 52 in the radial direction with respect to the outer peripheral portion 52C. The collar portion 54 is provided on the inner peripheral portion 52D of the fixed portion 52. Hereinafter, the collar portion 54 will be described more specifically.

  The collar portion 54 extends from the inner peripheral portion 52D of the fixed portion 52 in a direction intersecting the surface of the fixed portion 52. Furthermore, the collar portion 54 extends in a direction orthogonal to the surface of the fixed portion 52, that is, in the direction X0 (axial direction). More specifically, as shown in FIG. 3, the collar portion 54 extends from the base end portion 54C connected to the inner peripheral portion 52D of the fixed portion 52 to the tip end portion 54D along the direction X0. Further, as shown in FIG. 2, the collar portion 54 extends from the first end portion 54A to the second end portion 54B along the circumferential direction of the fixed portion 52. The first end portion 54A is located between the one end portion 52A and the other end portion 52B of the fixed portion 52 in the circumferential direction of the fixed portion 52. The second end portion 54B is an end portion on the other end portion 52B side of the first end portion 54A, and in the circumferential direction of the fixing portion 52, the first end portion 54A of the collar portion 54 and the fixing portion 52 are formed. It is located between the other end 52B. That is, the flange portion 54 has a circumferential length shorter than the circumferential length of the fixed portion 52.

  Further, as shown in FIG. 2, the fixing portion 52 has at least one opening 60 (here, at least one opening 60) between the first end portion 54A and the second end portion 54B of the collar portion 54 in the circumferential direction of the fixing portion 52. Two openings 60B1 and 60B2) are provided. Further, in the fixing portion 52, at least one opening 60 (here, the opening 60A) is provided between one end portion 52A and the first end portion 54A of the collar portion 54 in the circumferential direction of the fixing portion 52. There is. Further, in the fixing portion 52, at least one opening 60 (here, the opening 60C) is provided between the second end portion 54B of the collar portion 54 and the other end portion 52B in the circumferential direction of the fixing portion 52. There is. In the fixed portion 52, the number of openings 60 between the first end portion 54A and the second end portion 54B is equal to the number of openings between the one end portion 52A and the first end portion 54A, and the second end portion. More than the number of openings between 54B and the other end 52B is preferable. However, the position and the number of the openings 60 can be set arbitrarily.

(About repair method)
The repair member 50 is configured as described above. Hereinafter, a method of repairing the pipe 1 using the repairing member 50 will be described. 4 to 9 are schematic diagrams for explaining the pipe repair method according to the present embodiment. 4 and 5 show a state in which water is leaking in the pipe 1, and FIG. 5 is a cross-sectional view taken along the arrow B in FIG. In the tube 1, as the inner tube 12 and the outer tube 14 are displaced or deformed over time, the space S may expand and a gap T may be formed, as shown in FIG. .. The gap T is a space formed between the inner peripheral surface 24C of the flange collar 24 and the outer peripheral surface 12D of the inner pipe 12. In such a case, since the watertightness of the filling member 16 is reduced, the water W inside the pipe 1 may leak to the outside through the space S and the gap T. Further, in the case where the gap T is large, the filling member 16, here the grease cotton 18, is pushed by the water pressure and passes through the gap T from the space S to the outside, that is, in the direction X1 side of the flange collar portion 24. There is. As shown in FIG. 5, the formation of such a gap T, the leakage of water, and the protrusion of the grease cotton 18 are not the entire circumference of the inner peripheral surface 24C of the flange collar portion 24 in the circumferential direction, but a part in the circumferential direction. Often occurs only in the section. For example, as shown in FIG. 5, on the direction Z2 side, that is, on the lower side in the vertical direction, the deformation due to gravity is large, so that a gap T is likely to occur, and water leakage and protrusion of the grease cotton 18 are likely to occur. However, the positions of the formation of the gap T, the leakage of water, and the protrusion of the grease cotton 18 in FIG. 5 are merely examples, and may occur at various positions depending on the situation.

  The repairing method according to the present embodiment is performed while continuing the conduction of the water W in the pipe 1. That is, the water W exists in the pipe 1 and is in a waterless state. In the repair method according to the present embodiment, first, a gap detection step of detecting whether the gap T has occurred is executed. For example, it is detected whether water leaks from the gap T and whether the filling member 16 (grease cotton 18) is protruding from the gap T. That is, in the gap detecting step, it is determined that the gap T is generated when water leakage occurs and the filling member 16 is protruding. In the present embodiment, the gap detection step is visually performed by the operator, but may be automatically performed by, for example, a detection device that detects water leakage or protrusion.

  When the gap T is detected, that is, when it is determined that the gap T is generated, the worker measures the width D0 of the gap T shown in FIG. 4 and the length E0 of the gap T shown in FIG. The width D0 is the length of the gap T in the radial direction, in other words, the length in the radial direction between the inner peripheral surface 24C of the flange collar portion 24 and the outer peripheral surface 12D of the inner pipe 12. The length in the radial direction is the length in the radial direction about the central axis AX. Further, the length E0 is the length of the gap T in the circumferential direction, and the length in the circumferential direction is the length in the circumferential direction about the central axis AX. As shown in FIG. 5, the length E0 of the gap T is the length of the section between the inner peripheral surface 24C of the flange collar portion 24 and the outer peripheral surface 12D of the inner pipe 12 in which the grease cotton 18 protrudes. However, it may be the length of the leaking section. Further, the width D0 is a width in a section where the grease cotton 18 is protruding between the inner peripheral surface 24C of the flange collar portion 24 and the outer peripheral surface 12D of the inner pipe 12, but is a width in a section where water is leaking. It may be.

  In the gap detecting step, it suffices to detect whether or not the gap T is generated, and it is not necessary to detect water leakage or the protrusion of the grease cotton 18. That is, in the gap detection step, it is possible to detect that the gap T is present when the gap T is present even if there is no water leakage or protrusion. In addition, when the water leakage or the protrusion does not occur, for example, when the width D0 of the gap T is equal to or larger than a predetermined threshold value, it is detected that the gap T is generated. For example, if the gap T is detected before water leakage occurs, water leakage can be prevented by inserting the repair member 50 into the gap T as described later, and the gap T can be detected before the grease cotton 18 protrudes. Then, by inserting the repairing member 50 into the gap T, it is possible to prevent the grease cotton 18 from protruding.

  After the length E0 and the width D0 of the gap T are measured in the gap detecting step, a preparatory step of preparing the repair member 50 is executed. In the preparation step, the shape of the repair member 50 is set based on the length E0 and the width D0 of the gap T, and the repair member 50 is prepared (manufactured) with the set shape. In the preparation step, the length E1 in the circumferential direction of the collar portion 54 shown in FIG. 2 (from the first end portion 54A to the second end portion 54B) is based on the length E0, that is, the length of the region where water leakage or protrusion occurs. Up to) is set. Specifically, in the preparation step, the circumferential length E1 of the collar portion 54 is set to be longer than the length E0. The length E1 is preferably, for example, 1 time or more and 2 times or less than the length E0. Further, in the preparation step, the width D1 of the collar portion 54 shown in FIG. 3 is set based on the width D0, that is, the width of the region in which water leakage or protrusion occurs. The width D1 is the length of the collar portion 54 in the radial direction. Specifically, in the preparation step, the width D1 of the collar portion 54 of the repair member 50 is set to be shorter (thinner) than the width D0. The width D1 is preferably larger than the width D0 by about 1 mm, for example. Further, the length L1 of the collar portion 54 may be set in the preparation step. As shown in FIG. 3, the length L1 is the length of the collar portion 54 in the direction X0, that is, the axial direction. Further, as shown in FIG. 1, the length of the flange portion 20 in the direction X0, that is, the axial direction is defined as a length L2. The length L1 is at least half the length L2, and is preferably shorter than the length L2, that is, (L2 / 2) ≦ L1 <L2. Furthermore, the length L1 is preferably shorter than the length L2 and close to the length L2.

  Then, in the preparation step, the circumferential length of the fixing portion 52 (the length from one end portion 52A to the other end portion 52B) is set based on the circumferential length E1 of the collar portion 54. .. As for the circumferential length of the fixing portion 52, at least one opening 60 (opening 60A in the example of FIG. 2) is formed on one end 52A side of the position of the first end 54A of the collar 54. It is set so that at least one opening 60 (opening 60B in the example of FIG. 2) is formed on the other end 52B side of the position of the second end 54B of the flange 54.

  When the shapes of the collar portion 54 and the fixing portion 52 (in this embodiment, the width D1, the length E1, and the circumferential length of the fixing portion 52) are set as described above, the repairing member has the set shape. 50 is prepared (manufactured). The detection of the gap T and the setting of the shapes of the collar portion 54 and the fixed portion 52 can be performed in about half a day, but the time required for the implementation is arbitrary. Further, the time required for the preparation of the repair member 50, that is, the manufacturing time is, for example, about 2 days (about 1 day for arranging the members, about 1 day for processing into the set shape), but the time required is arbitrary. is there.

  When the preparation of the repair member 50 is completed, an inserting step of inserting the repair member 50 into the gap T is executed. First, as shown in FIG. 6, a vise 70 is attached to the flange fixing portion 22 and the outer pipe flange portion 30. The vise 70 has a mounting portion 70A, a mounting portion 70B, and a connecting portion 70C that connects the mounting portion 70A and the mounting portion 70B. The mounting portion 70A is mounted on the surface of the outer pipe flange portion 30 in the direction X2 side, and the mounting portion 70B is mounted on the surface of the flange fixing portion 22 in the direction X1 side. Then, in this state, by tightening the vise 70, a force in the direction X1 is applied to the outer pipe flange portion 30 via the attachment portion 70A, and a direction is applied to the flange fixing portion 22 via the attachment portion 70B. Apply a force to the X2 side. Further, the vise 70 is attached to each of the regions M outside the both ends in the circumferential direction of the repaired portion, as shown in FIG. The repaired place is a place where a gap T is generated and water leakage and protrusion are generated. That is, two vise 70 are attached so as to sandwich the repaired portion in the circumferential direction. The area M may be an area other than the area to which the repair member 50 is attached. That is, the vise 70 may be attached to a region that does not interfere with the repair member 50. Further, the vise 70 is not limited to the vise and may be any mechanism as long as it functions as a holding part that holds the flange fixing part 22 and the outer pipe flange part 30 and applies an axial force in a direction in which they approach each other. May be

  After attaching the vise 70, as shown in FIG. 6, the bolt 40 and the nut 42 attached to the repaired portion are removed. By attaching the vise 70 before removing the bolt 40, the axial force can be continuously applied to the flange collar portion 24. Therefore, even if the bolt 40 is removed, the filling member 16 further protrudes or the flange portion 20 is removed. It is suppressed from being pushed out. It should be noted that only the bolts 40 attached to the repaired portion are removed. That is, in the example of FIG. 5, the bolts 40 (four bolts 40A, 40B, 40C, 40D on the direction Z2 side here) inside the region M to which the vise 70 is attached are removed, and the remaining bolts 40 are removed. , Not removed. When removing the bolts 40, they are removed one by one in the circumferential direction at intervals. That is, for example, the bolts 40A, 40C, 40B, and 40D are removed in this order. Further, it is preferable to refasten the vise 70 every time one bolt 40 is removed.

  After removing the bolt 40 at the repaired portion, as shown in FIG. 7, an inserting step and a fixing step are executed. In the inserting step, the repairing member 50 is inserted into the clearance T at the repairing place. More specifically, in the inserting step, the collar portion 54 of the repair member 50 is inserted into the gap T. For example, the worker inserts the tip end portion 54D of the collar portion 54 into the gap T from the side of the gap T in the direction X1 toward the direction X2. Then, the surface of the repair member 50 on the side of the fixing portion 52 in the direction X2 faces the surface of the flange fixing portion 22 on the side of the direction X1. Then, the openings 60 of the fixing portion 52, the openings 22A of the flange fixing portion 22, and the openings 30A of the outer pipe flange portion 30 are aligned with each other, and the bolts 40 are inserted into the openings 60, 22A, 30A, Tighten with the nut 42. The bolt 40 and the nut 42 are attached to each of the openings 60. As a result, the repair member 50 and the flange fixing portion 22 are overlapped with each other, and the surface of the fixing member 52 on the side of the fixing portion 52 in the direction X2 comes into close contact with the surface of the flange fixing portion 22 on the side of the direction X1. Then, thereby, the repair member 50 is fixed to the flange portion 20 and the outer pipe 14 while applying a force on the repair member 50 in the direction X2 (fixing step). By performing the inserting step and the fixing step in this manner, at least a part of the gap T is closed by the collar portion 54. Further, the collar portion 54 is inserted into the gap T, so that the protruding portion 54D pushes the protruding filling member 16 (the grease cotton 18) into the gap T. The filling member 16 is deformed by being pushed into the gap T in this manner, comes into contact with the outer peripheral surface 12D of the inner pipe 12 and the inner peripheral surface 14C of the outer pipe 14, is filled in the gap T, and is filled with the gap T. Block. With this, it is possible to suppress the water leakage while returning the filling member 16 into the gap T.

  In addition, in the insertion step and the fixing step, when the collar portion 54 is not properly inserted into the gap T or the fixing portion 52 is not properly fixed to the flange portion 20, the repair member 50 is appropriately selected. When it is determined that the repair member 50 has not been attached, the repair member 50 is removed and reattached. At this time, the shape of the collar portion 54 may be adjusted. For example, when the length L1 of the collar portion 54 shown in FIG. 7 is too long to fit in the gap T, the collar portion 54 is processed so as to be shorter, and the inserting step is performed again. Further, for example, when the width D1 of the collar portion 54 is too thick to be inserted into the gap T, the width D1 is processed to be thin and the insertion step is performed again.

  After fixing the repair member 50 with the bolts 40, as shown in FIG. 9, the vise 70 attached to the flange portion 20 in the region M is removed, and the vise 70 is attached to the regions 52F1 and 52F2 of the repair member 50. cure. Specifically, as shown in FIG. 8, the mounting portion 70A is mounted on the surface of the outer pipe flange portion 30 on the X2 side, and the mounting portion 70B is mounted on the regions 52F1 and 52F2 of the fixing portion 52 of the repair member 50. Install. Then, in this state, by tightening the vise 70, a force in the direction X1 is applied to the outer pipe flange portion 30 via the attachment portion 70A, and a direction X2 is applied to the fixed portion 52 via the attachment portion 70B. Apply a force to the side. The vise 70 attached to the flange portion 20 and the vise 70 reattached to the repair member 50 may be different or the same. Further, the vise 70 may be any as long as it functions as a sandwiching part that sandwiches the fixing part 52 and the outer pipe flange part 30, that is, the fixing part 52 and the flange fixing part 22 and applies an axial force in a direction toward each other. The mechanism is not limited to a vise, and may be any mechanism. Further, the vise 70 may not be attached to the repair member 50, and the repair member 50 may be fixed only by the bolt 40.

  As described above, the repair of the pipe 1 is completed by inserting and fixing the repair member 50 in the repaired portion. The time required for this process is, for example, about half a day, but may be any time depending on the situation. By repairing the pipe 1 in this way, it is possible to hold the filling member 16 in the gap T without returning the conduction of the water W in the pipe 1 and hold the filling member 16 in the gap T to suppress water leakage. Hereinafter, the repairing method of the pipe 1 will be described again with a flowchart. FIG. 10 is a flowchart of the pipe repairing method according to the present embodiment. As shown in FIG. 10, in the repair method according to the present embodiment, first, it is detected whether water leakage is occurring from the pipe 1 (step S10), and if water leakage is occurring (step S10; Yes). , It is detected whether the filling member 16 is protruding from the gap T (step S12). If no water leakage has occurred (step S10; No), it is determined that repair is not necessary, and this processing ends. However, as described above, this processing may be performed when it is determined that there is the gap T even if water leakage has not occurred. Note that steps S10 and S12 correspond to the gap detection step.

  When the filling member 16 does not protrude from the gap T (step S12; No), the repairing method according to the present embodiment is deemed unnecessary, and this processing is ended. In this case, for example, it may be possible to suppress water leakage by tightening the bolt 40 even without inserting the repair member 50. However, as described above, if it is determined that there is the gap T even if the filling member 16 does not protrude, the main process using the repair member 50 may be performed. Further, when there is no extra tightening margin of the bolt 40, the circulation of the water W may be stopped and the filling member 16 may be replaced for repair work without performing the main treatment and the additional tightening treatment of the bolt 40.

  When the filling member 16 is protruding (step S12; Yes), the repair member 50 is prepared (step S14). Specifically, the length E0 and the width D0 of the gap T are measured, the shape of the repair member 50 is set based on the measurement result, and the repair member 50 is prepared with the set shape. After the repair member 50 is prepared, the vise 70 is attached to the region M of the flange portion 20 (step S16), and the bolt 40 at the repair location is removed (step S18). Then, the collar portion 54 of the repair member 50 is inserted into the gap T (step S20; insertion step), and the fixing portion 52, the flange fixing portion 22, and the outer pipe flange portion 30 of the repair member 50 are fixed by the bolt 40. Temporarily tighten (step S22). After the temporary tightening, it is confirmed whether or not the repair member 50 is properly attached (step S24). If the repair member 50 is properly attached (step S24; Yes), the bolt 40 is fully tightened to fix the repair member 50. It is fixed to the flange fixing portion 22 (step S26). At this time, the bolt 40 is fully tightened while checking whether the water is stopped in the entire circumference in the circumferential direction, and further, it is checked whether the fixing portion 52 of the repair member 50 and the flange fixing portion 22 are in close contact with each other. Meanwhile, the bolt 40 is fully tightened. That is, when fixing the repair member 50, it is preferable that the fixing portion 52 and the flange fixing portion 22 are in close contact with each other.

  After the bolt 40 is fully tightened, the vise 70 attached to the flange portion 20 is removed, and the vise 70 is attached again to the regions 52F1 and 52F2 of the fixing portion 52 of the repair member 50 (step S28), and the present processing ends. To do. The steps S22 to S28 correspond to the fixed step. In addition, when there are a plurality of repair locations, the repair member 50 is prepared for each repair location, and steps S16 to S24 are repeated for each repair location. Then, when all the repair members 50 are properly attached, the bolts 40 are fully tightened in step S26. When the repair member 50 is not properly fixed (step S24; No), the procedure returns to step S18, the temporarily tightened bolt 40 is removed, and the repair member 50 is adjusted, for example, to repair it. Reattach the member 50.

  Also, a lifting step may be performed when repairing the tube 1. In the lifting step, for example, a lifting member such as a wood wedge or a jack is used to lift the pipe 1, here the outer pipe 14, in the direction Z1 side and hold the lifted state to prevent deformation of the pipe 1 in the direction Z2 side. It is a process of suppressing. By performing this lifting process, it is possible to prevent the gap T from locally increasing, and it is possible to appropriately suppress water leakage. This lifting step may be performed at any stage, but is performed, for example, when water leakage cannot be suppressed even if step S26 is performed. In this case, it is preferable to further tighten the bolt 40 after performing the lifting step.

  As described above, the pipe 1 according to the present embodiment includes the outer pipe 14, the inner pipe 12 inserted into the outer pipe 14 from the end portion 14A of the outer pipe 14, and the outer peripheral surface 12D of the inner pipe 12. The filling member 16 is provided between the inner peripheral surface 14C of the outer pipe 14 and the flange portion 20 having the flange fixing portion 22 and the flange collar portion 24. The flange fixing portion 22 is a ring-shaped member. The flange collar portion 24 extends from the inner peripheral portion 22B of the flange fixing portion 22, and is inserted between the end portion 14A of the outer pipe 14 and the outer peripheral surface 12D of the inner pipe 12 and the inner peripheral surface 14C of the outer pipe 14. By doing so, the filling member 16 is pushed into the opposite side of the end portion 14A of the outer tube 14. The method for repairing the pipe 1 according to the present embodiment has a gap detecting step, an inserting step, and a fixing step. The gap detecting step detects whether or not there is a gap T between the inner peripheral surface 24C of the flange flange portion 24 and the outer peripheral surface 12D of the inner pipe 12. In the inserting step, if there is a gap T, the repair member 50 is inserted into the gap T. The fixing step fixes the repair member 50 to the flange portion 20 with the repair member 50 inserted in the gap T.

  When a gap T is formed between the inner peripheral surface 24C of the flange flange portion 24 and the outer peripheral surface 12D of the inner pipe 12, there is a risk that water may leak from the gap T or the filling member 16 may protrude. In particular, when the filling member 16 protrudes, it may not be possible to return the filling member 16 by simply tightening the bolt 40, and it may not be possible to suppress water leakage. On the other hand, when replacing the filling member 16, it is necessary to stop the flow of the water W in the pipe 1. On the other hand, the repairing method according to the present embodiment detects that the clearance T is present and inserts the repairing member 50 into the clearance T. Therefore, the gap T is preferably closed, the filling member 16 is prevented from protruding from the gap T, and the pipe 1 can be appropriately repaired without stopping the flow of the water W in the pipe 1. Further, since the repair member 50 can have a simple shape, the repair member 50 can be easily processed, and repair can be performed immediately. In addition, since the bolt 40 and the like can be reused, a member for removing the bolt 40 is unnecessary, and the generation of waste can be suppressed.

  Further, in the gap detecting step, it is detected whether water leaks from the gap T and the filling member 16 is protruding from the gap T, and in the inserting step, the repair member 50 is inserted into the gap T to perform repair. The filling member 16 is pushed into the gap T by the member 50 to suppress water leakage from the gap T. In this repair method, the filling member 16 protruding from the gap T is pushed into the gap T by the repair member 50. Therefore, it is possible to appropriately repair the pipe 1 without appropriately closing the gap T and stopping the flow of the water W in the pipe 1.

  Further, the repair member 50 has a plate-shaped fixing portion 52 and a collar portion 54 extending from the fixing portion 52 in a direction intersecting the surface of the fixing portion 52. Then, in the inserting step, the collar portion 54 is inserted into the gap T, and in the fixing step, the fixing portion 52 is fixed to the surface of the flange fixing portion 22. According to this repair method, by inserting the collar portion 54 into the gap T, the protrusion of the filling member 16 is suppressed, and the fixing portion 52 is fixed to the surface of the flange fixing portion 22, so that the state is appropriately maintained. be able to.

  Further, the fixing portion 52 and the flange fixing portion 22 are provided with openings 60 and 22A into which the bolt 40 is inserted, and in the fixing step, the bolt 40 is inserted into the openings 60 and 22A between the fixing portion 52 and the flange fixing portion 22. By doing so, the repair member 50 is fixed. According to this repair method, the fixing portion 52 can be properly fixed.

  The repairing member 50 has an arc shape in which the fixing portion 52 extends from one end portion 52A to the other end portion 52B. The collar portion 54 has a first end portion 54A located between one end portion 52A and the other end portion 52B of the fixed portion 52, and a first end portion 54A and the other end portion 52B of the fixed portion 52. It extends along the inner circumference of the fixed portion 52 up to the second end portion 54B located between and. The opening 60 is provided between the one end portion 52A of the fixing portion 52 and the first end portion 54A of the collar portion 54, and between the first end portion 54A and the second end portion 54B of the collar portion 54. And a portion between the second end portion 54B of the collar portion 54 and the other end portion 52B of the fixing portion 52. According to this repair method, water leakage can be appropriately suppressed by mounting the repair member 50 having such a shape. That is, by providing the opening 60 at such a position with respect to the collar portion 54, the bolt 40 inserted into the opening 60 can suitably apply the axial force to the repair member 50, and the water leakage can be appropriately performed. Can be suppressed to.

  Further, the outer pipe 14 has an outer pipe flange portion 30 facing the flange fixing portion 22 and provided with an opening 30A into which the bolt 40 is inserted. In the fixing step, the repair member 50 is fixed by inserting the bolt 40 into the openings 60, 22A, 30A of the fixing portion 52, the flange fixing portion 22, and the outer pipe flange portion 30. According to this repair method, the fixing portion 52, the flange fixing portion 22, and the outer pipe flange portion 30 are fixed, so that the fixing portion 52 can be fixed appropriately.

  Further, in the fixing step, the fixing portion 52 and the outer pipe flange portion 30 are further sandwiched by the sandwiching portion (the vise 70). According to this repairing method, axial force can be applied to the fixing portion 52 not only by fixing with the bolt 40 but also by holding the holding portion, so that water leakage can be appropriately suppressed.

  Further, the pipe 1 according to the present embodiment is provided between the outer pipe 14, the inner pipe 12 provided inside the outer pipe 14, the outer peripheral surface 12D of the inner pipe 12 and the inner peripheral surface 14C of the outer pipe 14. And a flange portion 20 having a flange fixing portion 22 and a flange collar portion 24. The flange fixing portion 22 is a ring-shaped member, and the flange collar portion 24 extends from the inner peripheral portion 22B of the flange fixing portion 22 to form the outer peripheral surface 12D of the inner pipe 12 and the inner peripheral surface 14C of the outer pipe 14. Inserted in between. The repair member 50 according to the present embodiment is a repair member for the pipe 1, and has a fixing portion 52, a collar portion 54, and an opening 60. The fixed portion 52 is an arc-shaped member extending from one end portion 52A to the other end portion 52B. The collar portion 54 includes a first end portion 54A located between one end portion 52A and the other end portion 52B of the fixed portion 52, and a first end portion 54A and the other end portion 52B of the fixed portion 52. It extends along the inner peripheral portion 52D of the fixed portion 52 to the second end portion 54B located therebetween. The opening 60 is located between one end 52A of the fixed portion 52 and the first end 54A of the collar 54, and between the first end 54A and the second end 54B of the collar 54. And a portion between the second end portion 54B of the collar portion 54 and the other end portion 52B of the fixing portion 52, and the bolt 40 can be inserted. The flange 54 is insertable between the outer peripheral surface 12D of the inner pipe 12 and the inner peripheral surface 14C of the outer pipe 14, and the fixing portion 52 is configured to be fixed to the flange fixing portion 22. Since the repairing member 50 has such a structure, the gap T is preferably closed, the filling member 16 is prevented from protruding from the gap T, and the flow of the water W in the pipe 1 is stopped. The pipe 1 can be appropriately repaired without the need to do so.

  Although the embodiments of the present invention have been described above, the present invention is not limited by the contents of these embodiments. Further, the above-described constituent elements include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those that are in a so-called equivalent range. Furthermore, the components described above can be combined appropriately. Furthermore, various omissions, substitutions, or changes of the constituent elements can be made without departing from the scope of the above-described embodiment.

1 Tube 10, 12 Inner Tube 14 Outer Tube 14A End 16 Filling Member 20 Flange 22 Flange Fixing 24 Flange Collar 40 Bolt 50 Repairing Member 52 Fixing 52A One End 52B Other End 54 Collar 54A First end portion 54B Second end portion S space T gap

Claims (8)

An outer pipe, an inner pipe inserted from the end of the outer pipe into the outer pipe, a filling member provided between the outer periphery of the inner pipe and the inner periphery of the outer pipe, and a ring-shaped flange The fixing member extends from the inner circumference of the flange fixing portion, and is inserted between the outer circumference of the outer pipe and the inner circumference of the outer pipe from the end portion of the outer pipe, whereby the filling member is formed. A method of repairing a pipe having a flange portion having a flange collar portion that is pushed into the opposite side of the end portion of the outer pipe,
A gap detection step of detecting whether there is a gap between the inner circumference of the flange collar portion and the outer circumference of the inner pipe,
An insertion step of inserting a repair member into the gap when the gap is present,
With a repair member inserted in the gap, a fixing step of fixing the repair member to the flange portion,
A method for repairing a pipe having a. In the gap detecting step, water leakage occurs from the gap, and the filling member detects whether it is protruding from the gap,
The pipe according to claim 1, wherein, in the inserting step, by inserting a repair member into the gap, the repair member pushes the filling member into the gap to suppress water leakage from the gap. Repair method. The repair member has a plate-shaped fixing portion, and a brim portion extending from the fixing portion in a direction intersecting a surface of the fixing portion,
In the inserting step, the collar portion is inserted into the gap,
The method for repairing a pipe according to claim 1 or 2, wherein in the fixing step, the fixing portion is fixed to a surface of the flange fixing portion. The fixing portion and the flange fixing portion are provided with an opening into which a bolt is inserted,
The pipe repair method according to claim 3, wherein, in the fixing step, the repair member is fixed by inserting the bolt into the openings of the fixing portion and the flange fixing portion. The repair member is
The fixed portion is an arc shape extending from one end to the other end,
The brim portion is located between a first end portion located between one end portion and the other end portion of the fixing portion and between the first end portion and the other end portion of the fixing portion. Extending to the second end along the inner circumference of the fixed portion,
The opening has a location between one end of the fixing portion and a first end of the collar portion, a location between a first end and a second end of the collar portion, and the collar. The method for repairing a pipe according to claim 4, wherein the pipe is provided at a position between the second end of the portion and the other end of the fixed portion. The outer pipe has an outer pipe flange portion facing the flange fixing portion and provided with an opening into which the bolt is inserted,
The pipe according to claim 4 or 5, wherein in the fixing step, the repair member is fixed by inserting the bolt into the openings of the fixing portion, the flange fixing portion, and the outer pipe flange portion. Repair method.   The method for repairing a pipe according to claim 6, wherein, in the fixing step, the fixing portion and the outer pipe flange portion are further sandwiched by a sandwiching portion. An outer pipe, an inner pipe provided inside the outer pipe, a filling member provided between the outer periphery of the inner pipe and the inner periphery of the outer pipe, a ring-shaped flange fixing portion, and the flange fixing portion. A member for repairing a pipe having a flange portion extending from an inner periphery and having a flange collar portion inserted between the outer periphery of the inner pipe and the inner periphery of the outer pipe,
An arc-shaped member extending from one end to the other end, a fixing portion that can be fixed to the flange fixing portion,
Up to a first end located between one end and the other end of the fixed part and a second end located between the first end and the other end of the fixed part A collar portion that extends along the inner circumference of the fixed portion and is insertable between the outer circumference of the inner pipe and the inner circumference of the outer pipe,
In the fixing portion, a portion between one end portion of the fixing portion and the first end portion of the collar portion, a portion between the first end portion and the second end portion of the collar portion, and An opening provided at a location between the second end of the collar portion and the other end of the fixing portion, into which a bolt can be inserted,
A member for repairing pipes.

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