JP5512381B2 - Repair covering and repair method of existing pipe using the same - Google Patents

Description

  The present invention relates to a covering for repairing a pipe inner peripheral surface of an existing pipe and repairing it, and a method for repairing an existing pipe using the same.

  In general, fume pipes, ceramic pipes, hard vinyl chloride pipes and the like are widely used for pipes such as sewer pipes. These pipes may have gaps due to displacement of the joints of the pipes due to earth pressure or ground subsidence due to long-term use, or cracks may occur in some of the pipes due to overloads or the like.

  As a countermeasure against this, there is a pipe repair method in which the inner peripheral surface of the pipe is covered with a covering for repair (for example, Patent Document 1). For example, as shown in a perspective view in FIG. 16, the repair covering body 100 used in this pipe line repairing method includes an annular elastic member 101 and a flexible plate member 110.

  The plate member 110 is made of a metal material having excellent corrosion resistance, such as stainless steel, or a synthetic resin, and is deformed into a cylindrical shape that overlaps each other so that one end portion is inside the other end portion, that is, a spiral shape. Thereafter, it is inserted into the annular elastic member 101.

  As shown in a developed perspective view in FIG. 17, the plate member 110 has an edge portion 112 curved outward so as to accommodate the annular elastic member 101 along both side ends of the plate member 110. At the time of sewage flowing through existing pipes and cleaning of pipes, the annular elastic member 101 is protected and the plate member 110 is stiffened to improve the strength of the pipes.

  In addition, a plurality of locking holes 113 are arranged in a row with a predetermined dimension on one end side of the plate member 110, and the locking that can be locked in the locking holes 113 with a predetermined dimension on the other end side. A piece 114 is formed so as to protrude and protrude inwardly of the plate member 110 by processing, and a locking portion 115 (maintaining the plate member 110 in an expanded state by the locking hole 113 and the locking piece 114). 16).

  When repairing the existing pipe line 131 (see FIG. 18) using the repair covering body 100 configured as described above, first, the repair covering body 100 is mounted on a spreader 120 for expanding the diameter. As shown in FIG. 18, the spreader 120 has a cylindrical main body 121 and an expansion portion 122 that is fixed to the outer periphery of the main body 121 and expands in a balloon shape by supplying a pressure fluid, for example, compressed air. Then, the repair covering 100 is mounted by inserting the expansion portion 122 into the plate member 110 in a contracted state.

  Next, the pipe inner peripheral surface 132 is cleaned in advance for the repair covering 100 and the spreader 120, and the existing pipe 131 is subjected to surface treatment for removing mortar attached to the surface, invading tree roots, and the like as necessary. It is moved to a repair location such as a crack occurrence portion or a seam (not shown).

  Compressed air or the like is supplied from a compressor disposed on the ground via a hose 123 to expand the expansion portion 122. The plate member 110 of the repair covering 100 is expanded by the expansion of the expansion portion 122, and is expanded to such an extent that the locking piece 114 can be engaged with any one of the locking holes 113. As a result, the annular elastic member 101 disposed on the outer periphery of the plate member 110 is expanded in a cylindrical shape, and the water stop body 103 is in pressure contact with the pipe inner peripheral surface 132 and elastically deforms, thereby the pipe inner peripheral surface 132 and the plate. The gap between the member 110 is sealed without any gap.

  Next, the compressed air supplied to the expansion part 122 is discharged and the expansion part 122 is contracted. When the inflating portion 122 contracts, a force for reducing the diameter of the plate member 110 by the restoring force of the annular elastic member main body 102 and the waterstop body 103 acts on the plate member 110, and the locking piece 114 has any one set of locking holes 113. Engage with. Therefore, the annular elastic member main body 102 and the waterstop body 103 are held in a compressed state by the pipe inner peripheral surface 132 and the plate member 110, and the repair covering 100 is installed in the pipe. Then, the spreader 120 is removed from the existing pipeline 131.

  In addition, the present applicant curved one plate member into a substantially cylindrical shape, a cylindrical body in which a base end portion and a terminal end portion of the plate member face each other, an outer peripheral surface of the cylindrical body, and an existing pipe line A repair covering having an annular elastic member interposed between a peripheral surface and a peripheral surface is proposed (Patent Document 2). In this covering for repair, a pair of insertion members are inserted into the gap formed by the base end portion and the terminal end portion of the cylindrical body from both ends in the longitudinal direction of the cylindrical body toward the central portion. The diameter of the cylindrical body is increased by separating the base end portion and the terminal end portion. Thereby, the covering for repair is pressed against the inner peripheral surface of the existing pipe, and the existing pipe is repaired.

JP-A-9-123277 JP 2005-344905 A JP 2005-214246 A

  However, when the covering 100 described in Patent Document 1 is used, as shown in the cross-sectional view of the cylindrical body in FIG. 19, the state before the diameter expansion in FIG. After expanding the diameter as shown in b), the locking piece 114 and the locking hole 113 are engaged as shown in FIG.

  In addition, the existing pipes have different inner diameters due to errors during manufacturing and enlargement due to deterioration due to long-term use. However, when the repair covering of Patent Document 2 is used, the size of the insertion member to be combined is different. Because there is a limit to the width that can be expanded by the above, even if the repair covering is installed in an expanded state, if the size does not match the diameter of the existing pipe after deformation, the existing pipe is pressed from the inside. I can't get enough power. In addition, it is desirable to measure the diameter of the existing pipes in advance and then manufacture a repair covering that fits the diameter, and then perform the repair work. is there.

  It is an object of the present invention to provide a covering for repair that is installed in an existing pipe in a state where the diameter of the cylindrical body is accurately expanded, and is compatible with existing pipes of various diameters. Moreover, it is providing the repair method of the existing pipe | tube using this covering for repair.

  In order to solve the above-mentioned problem, a repair covering for an existing pipe according to claim 1 is a repair covering for covering the inner peripheral surface of an existing pipe and repairing the existing pipe. The covering body is a cylindrical body formed by bending a plate member into a cylindrical shape, and is fitted between the outer peripheral surface of the cylindrical body and the inner peripheral surface of the existing pipe by being externally fitted to the cylindrical body. An annular elastic member, and the cylindrical body is composed of two plate members having flexibility arranged in a circumferential direction, and the two plate members are connected to each other at one end portion. Are connected by temporary fixing, and a gap portion for inserting the wedge member in the width direction is formed by the end portions on the temporarily fixed side, and the other end portions of the two plate members are mutually connected. Is wound by being overlapped by a predetermined length, and an engagement piece is provided in the vicinity of the end of one plate member of the overlapping portion, and the other plate member A plurality of locking holes are provided in the vicinity of the portion so that the locking pieces engage with each other at intervals in the circumferential direction, and the temporary fixing is performed during the engaging operation by the locking holes and the locking pieces. The state is maintained, and is performed by a temporary fixing tool having a holding strength that allows the temporary fixing state to be released during the diameter expanding operation by the wedge member.

  According to this structure, the cylindrical body is first expanded, and then the engagement piece is selectively engaged with any of the plurality of engagement holes to cope with the difference in inner diameter for each existing pipe. can do. Next, by inserting the wedge member into the gap, the two plate members are separated in the circumferential direction while the temporarily fixed state of the two plate members is released. Thereby, a cylindrical body can be expanded in an optimal state. That is, the slight diameter reduction that occurs when the locking piece is engaged can be eliminated here. Moreover, since the temporarily fixed state is automatically released when the wedge member is inserted, it is not necessary to manually release the temporarily fixed state. Therefore, the repair work can be facilitated and shortened.

  The repair covering according to claim 2 is the repair covering according to claim 1, wherein the wedge members are inserted in the width direction between the end portions of the plate member forming the gap portion. Inclined portions whose spacing is narrowed toward each other are provided, and the angle formed by each inclined portion is substantially the same as the angle formed by both side surfaces of the wedge-shaped portion of the wedge member.

  By providing the gap portion with an inclined portion corresponding to the wedge-shaped portion of the wedge member, both side surfaces of the wedge-shaped portion can be brought into contact with each other in correspondence with the inclined portion. As a result, it is possible to stably maintain the expanded diameter, and workability is improved.

  The covering for repair according to claim 3 is the covering for repair according to claim 1 or 2, wherein the wedge member has two plate portions covering the wedge-shaped portion from above and below, The temporary fixing is performed by inserting a part of the wedge member into the gap portion and inserting the temporary fixing tool into a region where the two plate members are sandwiched between the two plate portions. It is characterized by.

  Thus, by integrating the wedge member and the temporary fixing means, it is possible to easily configure a cylindrical body that connects the two plate members. Further, during the repair work, the repair covering is introduced into the existing pipe with a part of the wedge member inserted between the inclined portions of the cylindrical body. According to this configuration, the two plate members are temporarily fixed. In addition, since the wedge member is also temporarily fixed, the wedge member does not come off during the introduction operation. Therefore, it is possible to reliably repair the existing pipe.

  The repair method of the existing pipe of Claim 4 is arrange | positioned in the existing pipe which repairs the covering for repair of any one of Claims 1-3, and the expansion body installed inside the said cylindrical body And expanding the cylindrical body, engaging the locking piece and the locking hole to maintain the expanded diameter, and then between the inclined portions. And a second diameter expansion step of further expanding the diameter by releasing the temporarily fixed state by inserting the wedge member and separating the two plate members in the circumferential direction. .

  As in this configuration, in the repair method of the existing pipe, if the first diameter expanding step by the locking piece and the locking portion and the second diameter expanding step by the wedge member are performed, the covering for repairing can be performed in an optimal state. It can be installed in existing pipes.

  According to the covering for repair of the present invention, the tubular body can be installed on the existing pipe in an optimally expanded state, and the expanded pressure by the repair covering can be reliably applied to the existing pipe. It is possible to provide a general-purpose repair covering corresponding to the size of the diameter and a repair method using the same.

It is a disassembled perspective view explaining the structure of the covering for repair. It is an expanded view of a cylindrical body. It is a detailed perspective view of a locking piece. It is a perspective view explaining the structure of a wedge member. It is explanatory drawing which shows the state which inserted the wedge member into the clearance gap part partially. It is a perspective view which shows another example of a locking piece. It is sectional drawing which shows another example of a latching | locking part. It is detail sectional drawing which shows the connection part of two board members. It is sectional drawing of a cyclic | annular elastic body. It is principal part explanatory sectional drawing of a spreader and an insertion machine. It is explanatory drawing of the state which mounted | wore the repairing covering body and insertion machine to the expansion machine. It is explanatory drawing which shows a mode that a locking piece engages with a locking hole. It is explanatory drawing which shows a state when a wedge member is completely inserted in the cylindrical body. It is explanatory drawing which shows the covering for repair when a cylindrical body is fixed in the state which expanded the diameter. It is an expanded view which shows other embodiment of a cylindrical body. It is a perspective view which shows the conventional covering for repair. It is an expansion | deployment perspective view which shows the cylindrical body of the conventional coating | cover for repair. It is explanatory drawing at the time of installing and repairing the conventional covering for repair to an existing pipe. It is detail sectional drawing of the engaging part of a cylindrical body.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a structure of a repair covering 10 according to the present invention, and an existing pipe line 1 on which the repair covering 10 is installed is indicated by a broken line. The basic structure of the repair covering 10 is that a cylindrical body 20 having a reduced diameter is disposed, and the annular elastic member 12 is externally fitted to the outer periphery thereof. Then, the diameter of the cylindrical body 20 is expanded in the existing pipe line 1, the repair covering body 10 is pressed against the inner peripheral surface 2 of the existing pipe line 1, and the repair cover body 10 is installed in this state to install the existing pipe line. The repair of 1 is performed.

  FIG. 2 is a development view showing an example of the cylindrical body 20 used in the repair covering body 10 of the present invention. As shown in the drawing, two substantially rectangular plate members 22 a and 22 b are temporarily fixed at both ends of the respective end portions 26 and 28 to constitute the cylindrical body 20. The plate members 22a and 22b are formed of a member having a predetermined flexibility such as a steel material or a synthetic resin material.

  In the vicinity of the end portion 32 of the plate member 22a, a plurality of rectangular locking holes 42a, 42b, 42c are provided on the left and right sides, and in the vicinity of the other end portion 34 of the plate member 22b, as shown in FIG. Further, a locking piece 44 is formed so as to protrude inward of the cylindrical body 20 by cutting and raising. The two plate members 22a and 22b are overlapped with each other by a predetermined length so that the plate member 22b having the locking piece 44 is on the outer side and the plate member 22a having the locking hole 42 is on the inner side. (See FIG. 1 and FIG. 12 (a)).

  When the diameter of the cylindrical body 20 is increased by a spreader, which will be described later, and then slightly reduced in diameter, the locking piece 44 is selectively engaged with any one set of locking holes 42a, 42b, 44c. The diameter-expanded state of the cylindrical body 20 can be maintained (first diameter-expanding step).

  The locking pieces 44 shown in FIGS. 2 and 3 are rectangular, but may be formed in a trapezoidal shape or a triangular shape so as to be easily engaged with the locking holes 42a to 42c. In addition, the locking holes 42a to 42c are provided in one row on both the left and right sides in the width direction. It is also possible to do. Similarly, the locking piece 44 may be further added between the left and right locking pieces 44, or may be provided alone at the center. The number of locking holes in each row can be variously adjusted.

  Further, the locking piece may be provided on the end portion 34 of the plate member 22b as in the locking piece 44-1 shown in FIG. 6A, and the locking piece 44-2 shown in FIG. In this way, the plate member 22b may be formed so as to protrude from the end 34. Further, the locking piece may be formed by being cut out radially outward. In this case, as shown in FIG. 7, the plate member 122b having the locking piece 144 is overlapped so that the plate member 122a having the locking holes 142a to 142c is positioned outside. The locking operation is the same as described above.

  Bent portions 24 are formed at both ends in the width direction of the two plate members 22a and 22b, and when the cylindrical body 20 is formed, the bent portions 24 are bent outward in the radial direction. It is in the state that was done. The bent portion 24 prevents the annular elastic member 12 (see FIG. 1) from being displaced due to flowing water or the like flowing in the existing pipeline and reinforces the cylindrical body 20. Moreover, it is also for making it easy to flow the solid substance mixed in water and water. The bent portion 24 does not exist in the vicinity of the opposed end portions of 26 and 28, and a portion corresponding to the bent portion 24 is removed, and flat end portions 36 and 38 (see FIG. 4) are formed, respectively. doing.

  Inclined portions 26a, 26b and 28a, 28b are formed on both sides in the width direction of the end portions 26, 28 on the side where the two plate members 22a, 22b are connected. The inclined portions 26a, 26b, 28a, 28b are formed in a straight line so that the distance between the inclined portions 26a, 26b, 28a, 28b decreases from the outer side in the width direction toward the central portion. The central portions 26c, 28c of the connecting end portions 26, 28 are formed in a straight line and are configured to face each other with a gap therebetween. A gap 30 is formed by the ends 26 and 28, and the wedge member 50 is inserted into the gap 30.

  As shown in FIG. 4, the wedge member 50 is provided with a flat plate-like outer plate portion 58 and an inner plate portion 56 so as to sandwich the wedge-shaped portion 52 from above and below. On the insertion direction side of the upper and lower plate portions 56 and 58, insertion holes 54 are provided on both the left and right sides. The insertion hole 54 is a hole through which a wire 53, which will be described later, is inserted as a temporary fixture in order to temporarily fix and connect the two plate members 22a and 22b. An insertion hole 55 corresponding to the insertion hole 54 of the wedge member 50 is provided in the vicinity of the inclined portions 26a and 28a of the plate members 22a and 22b.

  A part of the wedge member 50 is inserted into the gap portion 30, and the wire 53 is inserted into each of the insertion holes 54 and 55 at a position where the insertion hole 54 of the wedge member 50 and the insertion hole 55 of the plate member coincide (FIG. 5). reference). The wire 53 inserted through the insertion holes 54 and 55 is maintained in a temporarily fixed state during the first diameter expanding process by the locking hole 42 and the locking piece 44, and the wedge member 50 is attached to the cylindrical body 20 in the second diameter expanding process. When moving to the center in the width direction, it is strong enough to break by the shearing force. The temporary fixing tool is not limited to the wire 53, and may be a bolt having the above holding strength.

  The wedge-shaped portion 52 has a length direction in the insertion direction 200, and has contact surfaces 52a and 52b that are in contact with and face the inclined portion 26a and the inclined portion 28a on both sides. The contact surfaces 52a and 52b form a narrow angle α that narrows in the insertion direction so that the narrow angle α is substantially equal to the angle β formed when the inclined portion 26a and the inclined portion 28a face each other. Is formed.

  The wedge member 50 is inserted into the gap portion 30 so that the contact surfaces 52a and 52b of the wedge-shaped portion 52 are in contact with the inclined portions 26a and 26b. In a state where the wedge member 50 is inserted into the gap portion 30, the outer plate portion 58 is positioned on the outer peripheral side of the cylindrical body 20, and the inner plate portion 56 is positioned on the inner peripheral side of the cylindrical body 20.

  FIG. 5 is a view of a state in which a part of the wedge member 50 is inserted into the gap portion 30 from the insertion opening side and temporarily fixed, as viewed from the outside of the cylindrical body 20. The diameter expansion operation of the cylindrical body 20 by the wedge member 50 will be described with reference to FIG.

  As described above, when the wedge member 50 is inserted, the wedge member 50 is inserted while the contact surfaces 52 a and 52 b of the wedge-shaped portion 52 are brought into contact with the inclined portions 26 a and 28 a of the gap portion 30. Due to the above-described shapes of the inclined portion 26a and the inclined portion 28a, the width of the gap portion 30 decreases from the outer side in the width direction of the cylindrical body 20 toward the central portion. Therefore, as the wedge member 50 moves through the gap 30 toward the central portion of the cylindrical body 20, the wire 53 is broken, and the inclined portions 26a and 28a are pushed by the contact surfaces 52a and 52b. It moves in the direction in which the width of the gap 30 becomes wider. Thereby, the diameter expansion of the cylindrical body 20 is performed.

  Then, when the diameter of the cylindrical body 20 is expanded to an optimally expanded state, the diameter expanding operation by the wedge member 50 is stopped, and the wedge member 50 is positioned as it is at the stop position, whereby the above-described state of the cylindrical body 20 is reached. The expanded state is maintained (second expanded step).

  In a state where the diameter of the cylindrical body 20 is expanded, a contracting force of the annular elastic body 12 and a reaction force of the protruding portion 16 provided on the annular elastic body 12 against the existing pipe 1 are applied to the cylindrical body 20. The inclined portions 26a and 28a tend to move in a direction approaching each other. Since the wedge-shaped portion 52 presses the inclined portions 26a and 28a with the contact surfaces 52a and 52b, the stress is applied almost uniformly to the entire surface of the contact surfaces 52a and 52b, so that the inclined portions 26a and 28a are formed on the wedge member 50. Deformation due to the intervention is prevented. As a result, it is possible to stably maintain the expanded diameter state of the cylindrical body 20.

  The member indicated by reference numeral 40-1 in FIG. 2 is the abutting plate member 40-1, and has a flat, substantially rectangular shape. The plate member 40-1 covers a portion that becomes the gap portion 30 of the cylindrical body 20, and prevents the annular elastic member 12 from being exposed to the inner peripheral side of the cylindrical body 20 and protruding from the gap portion 30. It is attached between the cylindrical body 20 and the annular elastic member 12. The plate member 40-1 is thinner than or equal to the cylindrical body 20 and can be formed of the same material as the plate member 22. As shown in the detailed cross-sectional view of the connecting portion of the plate members 22a and 22b in FIG. 8, one end 40a of the plate member 40-1 is coupled to the outside of the plate member 22a by, for example, welding, and the other end. The part 40b is not coupled, or is in a temporarily coupled state that is released when the plate members 22a and 22b are separated. A similar abutting plate member 40-2 is also provided at the other end portions 32, 34.

  FIG. 9 shows a schematic partial cross-sectional view of the annular elastic member 12 used in the present invention. The annular elastic member 12 has an annular shape that is pressed against the inner peripheral surface 2 of the existing pipe line 1 (not shown) by expanding the diameter of the cylindrical body 20. Specifically, a cylindrical sheet portion 14 that covers the outer periphery of the cylindrical body 20, and is formed to protrude along the circumferential direction on the outer periphery of both end portions of the sheet portion 14, and in the repaired state, the top portion is a tube. It has an annular ridge 16 that is in close contact with the road inner peripheral surface 2.

  In the repair of the existing pipe line 1 by the repair covering 10, the cracks generated in the existing pipe line 1 and the gaps between the pipes and the pipes are sealed between the protrusions 16 on both sides. With this configuration, groundwater or the like is prevented from entering the existing pipeline 1 from cracks or the like, or flowing water in the existing pipeline 1 is prevented from being discharged to the surroundings. Moreover, since the buffer action is shown with respect to the ground change due to an earthquake or the like, it also has an effect of imparting earthquake resistance to the repair covering 10.

  An operation for actually installing the repair covering 10 according to the above-described embodiment in the existing pipeline 1 will be described below with reference to FIGS. FIG. 10 shows a configuration of a spreader 60 that widens the cylindrical body 20 in the first diameter expanding step and an inserter 64 that inserts the wedge member 50 into the gap 30 in the second diameter expanding step. .

  Installation work of the covering 10 for repair is performed using this expansion machine 60 and the insertion machine 64. FIG. The spreader 60 includes a core body 62 and an expansion portion 68 that is provided on the outer periphery of the core body 62 and expands outward. Further, in order to enable the spreader 60 to travel, traveling means 66 is provided, and the traveling means 66 is rotatable to a leg 78 fixed to the inner peripheral side of the core body 62 and a tip end portion of the leg 78. And a wheel 84 provided on the vehicle.

  The core body 62 has a hollow cylindrical shape, and includes an expansion portion 68 that expands when supplied with, for example, compressed air. The repair covering body 10 (not shown) is attached to the outside of the core body 62. The length of the main body portion of the spreader 60 substantially matches the length of the repair covering 10.

  The insertion machine 64 has a pair of claw portions 74-1 and 74-2 for pressing and inserting the wedge member 50 (not shown) into the gap portion 30 of the cylindrical body 20, and one claw portion 74- A hydraulic cylinder 80 and a piston 79 attached thereto are provided as members for reciprocating 1. The claw portions 74-1 and 74-2, the hydraulic cylinder 80, and the piston 79 are loaded on the support portion 72. The hydraulic cylinder 80 and the claw portions 74-1 and 74-2 are attached to both ends of the support portion 72. It is fixed.

  The support portion 72 is provided at the upper part of the inner peripheral portion of the core body 62 so as to be movable in the length direction of the core body 62. Here, the operation of the hydraulic cylinder 80 is performed by supplying and discharging the working oil via the hydraulic hose 76.

  Next, a procedure for installing the repair covering 10 in the existing pipe line 1 using the spreader 60 and the inserter 64 will be described.

  FIG. 11 shows a state in which the repairing covering 10 is externally mounted on the spreader 60 provided with the insertion machine 64. This mounting is performed in the following procedure. First, the cylindrical body 20 is externally wrapped around the outer periphery of the inflating portion 68, and then the abutting plate member 40 is covered. Then, the annular elastic member 12 is fitted on the outer periphery of the cylindrical body 20.

  Next, the expansion machine 60 is pulled by, for example, a traction machine equipped with a television camera for observation of the diameter expansion work, and is carried into a repair location of the existing pipeline 1. The repaired portion of the existing pipe line 1 has an inner peripheral surface processed beforehand, and earth and sand and tree roots are removed.

  When the spreader 60 is carried to the repair location, the repair covering is in the state shown in FIG. 11 and the cylindrical body 20 is locked as shown in the detailed cross-sectional view of FIG. The plate member 22b having the piece 44 is on the outside, and the plate member 22a having the locking holes 42a, 42b and 42c is in a reduced diameter state overlapping the inside.

  From this state, the expansion portion 68 of the spreader 60 is expanded. Thereby, as shown in FIG.12 (b), the cylindrical body 20 is diameter-expanded. Next, when the expansion portion 68 is reduced by discharging compressed air or the like, a force for reducing the diameter of the cylindrical body 20 acts on the cylindrical body 20 due to the restoration of the annular elastic body 12 and the waterstop body, and FIG. ), The locking piece 44 engages with one of a set of locking holes 42a, 42b, 42c that can be locked (in this figure, 42b is engaged). Next, the wedge members 50 are inserted into the gap 30 by moving the claw portions 74-1 and 74-2 of the insertion machine 64 toward the center in the width direction of the cylindrical body 20. When the wedge member 50 is inserted, as shown in FIG. 13, the wire 53 for temporary fixing (not shown) is broken by the shearing force, and the end portions 26 and 28 of the two plate members 22a and 22b are connected to each other. Separate in the direction. According to the second diameter expanding step by inserting the wedge member 50, the diameter can be increased by the difference between the length of W1 shown in FIG. 5 and the length of W2 shown in FIG. It is fixed in an optimal state, and the repair covering 10 is placed in close contact with the pipe inner peripheral surface 2.

  FIG. 14 shows the overall configuration in a state where the above-described operation is completed. In the illustrated expanded diameter state of the covering 10 for repair, the protrusion 16 of the annular elastic member 12 is compressed and deformed, and the tubular body 20 and the pipe inner peripheral surface 2 are joined in a watertight manner. It has become.

  When this state is obtained, the diameter expansion work by the wedge member 50 of the cylindrical body 20 is stopped. Then, the claw portions 74-1 and 74-2 are moved away from the wedge members 50 and 50 by operating the hydraulic cylinder 80 of the insertion machine 64. Thereafter, the spreader 60 and the insertion machine 64 are removed from the repair covering 10, and the repair work is completed.

  FIG. 15 is a development view showing another embodiment of the cylindrical body used in the present invention. The end portions 26 and 28 of the plate members 22a and 22b overlap each other at the center portions 26a and 28c formed in an arc shape. Three pins 29 as temporary fixing tools are inserted in this overlapping region. Similar to the wire 53 described above, the three pins 29 are maintained in a temporarily fixed state during engagement of the locking piece 44 and the locking holes 42a to 42c, and are formed from the inclined portions 26a, 26b, 28a, 28b. When the wedge member is inserted into the gap portion 30, the holding strength is broken.

  Any material can be used as long as the strength can be temporarily fixed, and for example, it may be temporarily fixed by applying an adhesive to a region where the central portions 26c and 28c overlap.

  In addition, this invention is not limited to the structure of said each embodiment, A various deformation | transformation is possible within the range of the summary of invention. The gap portion 30 of the cylindrical body 20 is widened from the center side toward the outside. For example, like the insertion portion of the wedge member of the cylindrical body described in Patent Document 3, the cylindrical body is shown in FIG. It is good also as what has a clearance gap part which becomes wide toward the center part from the width direction outer side. In this case, the cylindrical body is configured by temporarily fixing the outer end in the width direction of the cylindrical body.

DESCRIPTION OF SYMBOLS 1 Pipe line 2 Existing pipe inner peripheral surface 10 Covering body 12 Repairing elastic member 14 Sheet | seat part 16 Projection part 20 Cylindrical body 22a, 22b Plate member 24 Bending part 26, 28 Connection side edge part 26a, 26b, 28a, 28b Inclined portion 26c, 28c Center portion 30 Clearance portion 32 Locking hole side end portion 34 Locking piece side end portion 42a, 42b, 42c Locking hole 44 Locking piece 50 Wedge member 60 Expander 64 Inserting machine 100 For repair Covering body 101 Annular elastic member 110 Plate member 113 Locking hole 114 Locking piece 120 Spreading machine 131 Existing pipe line 132 Existing pipe inner peripheral surface

Claims (4)

In the covering for repair that covers the inner peripheral surface of the existing pipeline and repairs the existing pipeline,
The repair covering body includes a cylindrical body formed by bending a plate member into a cylindrical shape, and is fitted between the outer peripheral surface of the cylindrical body and the inner peripheral surface of the existing pipe. An annular elastic member sandwiched between
The cylindrical body is composed of two flexible plate members arranged in the circumferential direction,
The two plate members are connected by temporarily fixing one end of each other,
A gap for inserting the wedge member in the width direction is formed by the end portions on the temporarily fixed side,
The other end portions of the two plate members are wound with a predetermined length overlapped, and a locking piece is provided in the vicinity of the end portion of one plate member of the overlapping portion, and the other plate In the vicinity of the end of the member, there are provided a plurality of locking holes with which the locking pieces engage with an interval in the circumferential direction,
The temporary fixing is performed by a temporary fixing tool having a holding strength that maintains the temporarily fixed state during the engaging operation by the locking hole and the locking piece and can be released during the diameter expanding operation by the wedge member. The covering for repair characterized by being performed. Between the end portions of the plate member forming the gap portion, an inclined portion is provided in which a separation interval becomes narrower in a direction in which the wedge member is inserted in the width direction,
2. The covering for repair according to claim 1, wherein an angle formed by each of the inclined portions is substantially the same as an angle formed by both side surfaces of the wedge-shaped portion of the wedge member. The wedge member has two plate portions covering the wedge-shaped portion from above and below,
The temporary fixing is performed by inserting a part of the wedge member into the gap portion and inserting the temporary fixing tool into a region where the two plate members are sandwiched between the two plate portions. The covering for repair of Claim 1 or 2 characterized by these. It arrange | positions in the existing pipe | tube which repairs the covering for repair of any one of Claims 1-3,
A first expansion that maintains the expanded state by expanding the diameter of the cylindrical body by engaging the expansion piece installed inside the cylindrical body and engaging the locking piece and the locking hole. Diameter process,
Next, by inserting the wedge member between the inclined portions, the temporary fixing state is released, and a second diameter expansion step of further expanding the diameter by separating the two plate members in the circumferential direction;
A method for repairing an existing pipe, characterized by including:

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