JP4544873B2 - Repair covering - Google Patents

Description

  The present invention relates to a repair covering for covering and repairing an inner peripheral surface of an existing pipeline.

  In general, fume pipes, ceramic pipes, rigid polyvinyl chloride pipes, and the like are widely used for pipes such as sewage pipes buried in the ground. 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, there is a pipe repair method in which the inner peripheral surface of the pipe is covered with a repair covering. A repair covering 100 used in this pipe line repairing method is constituted by a sleeve 101 and a base 110 as shown in a perspective view in FIG.

  The sleeve 101 includes a sleeve main body 102 formed in a cylindrical shape by a highly elastic material such as rubber, and an annular water stop 103 extending continuously in the circumferential direction on both sides in the busbar direction on the outer peripheral surface of the sleeve main body 102. Has been.

  The base 110 is made of, for example, a metal material having excellent corrosion resistance such as stainless steel or a synthetic resin, and after being 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. , Inserted into the sleeve 101.

  As shown in a developed perspective view in FIG. 14B, the base 110 has an elongated rectangular base portion 111, and an edge curved outward so as to accommodate the sleeve 101 along both side ends of the base portion 111. The edge 112 is used to protect the sleeve 101 and to stiffen the base 110 at the time of sewage flowing in the existing pipe 131 (see FIG. 15) or cleaning the pipe. The strength of the road 1 is improved.

  A plurality of locking holes 113 are arranged on one end side of the base 110 with a predetermined dimension, and a locking piece that can be locked on the locking hole 113 with a predetermined dimension on the other end side. 114 is formed so as to protrude inward of the base 110 by cutting and raising processing, and a locking portion 115 (FIG. 14 (FIG. 14 (FIG. 14) for maintaining the base 110 in an expanded state by the locking holes 113 and the locking pieces 114. (see a)).

  When repairing the existing pipeline 131 using the repair covering 100 configured as described above, first, the repair cover 100 is mounted on the spreader 120 for expanding the diameter. As shown in FIG. 15, 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. The repair covering 100 is attached by inserting the expansion portion 122 into the base 110 in a contracted state.

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

  And the expansion part 122 is expanded by supplying compressed air from the fluid source arrange | positioned on the ground through the hose 123. The base 110 of the repair covering 100 is expanded by the expansion of the expansion portion 122, and is expanded to the extent that the locking piece 114 can be engaged with any one of the locking holes 113. As a result, the sleeve 101 disposed on the outer periphery of the base 110 is expanded in a cylindrical shape, and the water blocking body 103 is pressed against the pipe inner peripheral surface 132 and elastically deformed, thereby causing the pipe inner peripheral surface 132 and the base 110 to be deformed. Seal the gap without any gaps.

  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 base 110 by the restoring force of the sleeve main body 102 and the waterstop body 103 acts on the base 110, and the locking pieces 114 engage with any one set of locking holes 113. . As a result, the base 110 is slightly reduced in diameter, but this reduced diameter is absorbed by the sleeve body 102 and the waterstop 103 being slightly restored. Therefore, the sleeve main body 102 and the water stop body 103 are held in a compressed state by the pipe inner peripheral surface 132 and the base 110, and the repair covering 100 is installed in the pipe 1. And the expansion machine 120 is removed from the inside of the existing pipeline 131 (for example, refer patent document 1).

  Further, the applicant of the present application is provided with a plurality of sleeve constituent members that form a cylindrical sleeve by arranging them in the circumferential direction along the inner circumferential surface of the existing pipeline, and the sleeve is mounted on the outer circumference of the sleeve. By placing in the existing pipe line, the annular elastic sheet member interposed between the sleeve and the inner peripheral surface of the pipe line is inserted between the opposite end portions of the sleeve constituting member from both sides of the sleeve in the generatrix direction and approach each other. A covering for repair having a fixing member that expands the diameter of the sleeve by moving it in the direction of pressing and presses the elastic sheet member against the inner peripheral surface of the pipe line is proposed (for example, Patent Document 2). reference).

  As a result, the cover for repair is made an assembly type, the work for repair in the existing pipeline is facilitated, the work efficiency is improved, and the parts are disassembled before assembly. As a result, the size and weight of each member are reduced to facilitate transportation and loading.

JP-A-9-123277 JP 2003-130282 A

  According to the pipe line repair method using the conventional first covering 100 for repair, the sleeve 101 is pressed against the pipe inner peripheral surface 132 by the base 110 held in the expanded state, and therefore the pipe inner circumference. A sufficient repair effect in which the surface 132 is covered with the sleeve 101 can be obtained.

  However, since the base 110 is reduced in diameter from the state where it is expanded to the maximum, the locking piece 114 is engaged with any one set of the locking holes 113, so that the base 110 corresponds to the diameter of the pipe inner peripheral surface 132. Thus, the positional relationship between the locking hole 113 and the locking piece 114 changes. For example, as shown in FIG. 16A in which the cross section of the locking portion 115 is enlarged, the front end of the locking piece 114 is engaged with the locking hole 113 and the locking hole 113 when the expansion device 120 is expanded to the maximum. , The locking piece 114 moves the distance X1 and engages with the locking hole 113. On the other hand, as shown in FIG. When the front end of the stop piece 114 has entered the lock hole 113, the lock piece 114 engages with the lock hole 113 only by moving a small distance X2.

  Therefore, the force with which the base 110 presses the sleeve 101 against the pipe inner peripheral surface 132 changes according to the diameter reduction amount of the base 110, and when the diameter reduction amount is large (see FIG. 16A), the pressing force is When it is low and the amount of diameter reduction is small (see FIG. 16B), the pressing force becomes high. As a result, the pressing force is different for each repair covering 100, and there is a possibility that a difference occurs in the water stopping capability and the fixing capability in the pipe 131.

  Further, when the repaired portion of the pipeline 131 is not sufficiently surface-treated and unevenness remains, or when the diameter of the pipe inner peripheral surface 132 is different from each other at the joint portion of the pipeline 131, Since the left and right diameters are different, it is expanded not in a cylindrical shape but in a tapered shape so that one end and the other end of the base 110 intersect with each other in an inclined manner with respect to the circumferential direction as shown in FIG. Is superimposed. In such a case, all of the locking pieces 114 do not engage with the locking holes 113 in one row, and there is a possibility that they engage over other rows.

  If the engagement of the locking piece 114 to the locking hole 113 is shallow, the locking piece 114 may come off the locking hole 113 due to vibration, ground fluctuation, or earthquake when the vehicle travels on the ground. . Therefore, sufficient engagement force cannot be exerted, and the force that presses the sleeve 101 against the pipe inner peripheral surface 132 becomes unstable, so that an appropriate water stop ability and a fixing ability in the existing pipe 131 are ensured. May be difficult.

  In the case of the above-described conventional second covering for repair, the sleeve is expanded in diameter by inserting the fixing member between the opposite ends of the sleeve constituent member from both sides of the sleeve in the generatrix direction and moving the fixing member toward each other. Yes. Therefore, the maximum diameter expansion state can always be maintained, and the highest water stopping ability and fixing ability can always be exhibited.

  The present invention provides a covering for repair that can be installed more stably in the existing pipe line by making the construction work in the existing pipe line easier than the conventional second cover for repairing. It was made for the purpose of doing.

The invention of the covering for repair according to claim 1 which solves the above-mentioned problem is a covering for repairing an existing pipe by covering the inner peripheral surface of the existing pipe, and the plate member is curved in a cylindrical shape Then, the base end edge and the end edge of the plate member are opposed to each other, and at least one of the base end edge and the end edge moves in the circumferential direction as it moves from the busbar direction central portion side toward the busbar direction both end portions side. A cylindrical body having a pair of inclined edges projecting along the ring, and an annular shape that is externally fitted to the cylindrical body and is mounted between the outer peripheral surface of the cylindrical body and the inner peripheral surface of the existing pipe line An elastic member is interposed between the base end edge and the end edge, and is moved from the center side in the bus bar direction toward the both ends in the bus bar direction by moving the base end and the end edge in the circumferential direction. is moved in a direction away from each other along possess a pair of enlarged diameter member whose diameter increases the cylindrical body, a pair of inclined end edge, the cylindrical body A pair of first inclined edges extending linearly at a substantially constant inclination angle so as to gradually protrude along the circumferential direction as they respectively move from the busbar direction central portion side toward the both ends of the busbar direction; And gradually projecting along the circumferential direction as the transition from the central portion side in the busbar direction toward the both end portions in the busbar direction continues to the end portions of the respective first inclined edge portions, and is smaller than the first inclined edge portions. And a pair of second inclined end edges extending linearly at an inclination angle .

According to a second aspect of the present invention, in the covering for repair according to the first aspect, the diameter-expanding member is interposed between the base end edge and the terminal end edge of the cylindrical body, thereby preventing the base end edge and the terminal end edge. A separation portion having a contact surface that is opposed to each other, and a flat plate that is formed continuously with one end portion of the separation portion and that faces the base edge side and the terminal edge side of the inner peripheral surface of the cylindrical body. An inner plate portion extending in a shape and a cylindrical body formed continuously from the other end of the separation portion so as to extend substantially in parallel with a predetermined gap between the inner plate portion and the inner plate portion. It has the outer side plate part extended in flat form facing each of the outer peripheral surface of the base end edge side, and the inner peripheral surface of the terminal edge side.

According to a third aspect of the present invention, in the repair covering according to the second aspect , the separating portion of the diameter expanding member faces the first inclined end edge over a predetermined length on the front side in the moving direction of the diameter expanding member. A first abutting surface that extends and a second abutting end of the second inclined end edge over a predetermined length on the rear side in the moving direction of the diameter-expanding member continuously from the first abutting surface. And a contact surface.

According to a fourth aspect of the present invention, in the repair covering according to the third aspect , the cylindrical body has a pair of inclined end edges provided at the base end edge and the terminal end edge, and the diameter expanding member is separated. The first abutting surface and the second abutting surface of the portion are provided at a location facing the base edge and a location facing the terminal edge, and the first contact surface on the base edge side and the first contact surface on the terminal edge side are provided. The included angle formed with the contact surface is equal to the included angle formed between the first inclined end edge of the base end edge and the first inclined end edge of the terminal end edge. The included angle formed between the contact surface and the second contact surface on the terminal edge side is an included angle formed between the second inclined edge of the base edge and the second inclined edge of the terminal edge It is characterized by having an equal wedge shape.

According to a fifth aspect of the present invention, in the repair covering according to the fourth aspect , the cylindrical body has a basic posture state in which the terminal edge overlaps the inner peripheral surface side of the base edge and is wound in a cylindrical shape. In the vicinity of the end edge and at the central portion in the busbar direction, a protrusion that protrudes toward the radial center is provided. When the diameter of the cylindrical body is increased by disposing it at the position, the engaging portion that engages with the protruding portion of the cylindrical body and moves the diameter-expanding member along the circumferential direction along with the terminal edge is directed toward the outer plate portion. It is characterized by being protruded.

According to a sixth aspect of the present invention, in the repair covering according to the fifth aspect , the diameter-enlarging member has an end on the base end edge side of the outer plate portion extending more than an end portion on the base end edge side of the inner plate portion. It has the structure to take out.

  According to the invention of claim 1, the plate member is curved into a cylindrical shape, and the annular elastic member is externally fitted to the cylindrical body whose base end edge and terminal end edge are opposed to each other, and the pair of diameter increasing members is used as a base. The annular elastic member is inserted between the end edge and the end edge and moved from the central portion side of the tubular body toward the both ends of the tubular body in the direction of the generatrix by expanding the diameter of the tubular body. By placing the annular elastic member between the outer peripheral surface of the tubular body and the inner peripheral surface of the existing pipe line, and between the cylindrical body and the pipe inner peripheral face. Seal.

  This prevents intrusion of groundwater, etc. between the pipe inner peripheral surface and the elastic member, and between the base part of the running water flowing in the existing pipe line and the inner peripheral surface of the pipe, Ensures a water stop effect.

  According to this, when the diameter is expanded and attached, the cylindrical body does not return in the diameter reducing direction, and the cylindrical body can be held in the maximum diameter expanded state. Therefore, even when the diameter of the cylindrical body is increased in a tapered shape, both end portions in the generatrix direction of the cylindrical body can be pressed against the inner peripheral surface of the pipe line with the same pressing force. Therefore, the force which fixes the covering for repair in the existing pipe line can be exhibited to the maximum.

  In addition, since the pair of diameter increasing members are moved from the central portion side of the cylindrical body toward the both ends of the busbar direction, it is possible to expand the diameter while applying a tensile force to the cylindrical body along the busbar direction. it can. Therefore, it is possible to suppress the deformation of the cylindrical body in the busbar direction, rather than moving from the both ends in the busbar direction toward the central portion in the busbar direction and applying a compressive force in the busbar direction to the cylindrical body to expand the diameter. The diameter expansion work of a cylindrical body can be performed easily.

  Furthermore, the invention of claim 1 specifically specifies the shapes of the base end edge and the terminal end edge of the cylindrical body, and according to this, at least one of the base end edge and the terminal end edge is a central portion in the busbar direction. Since it has a pair of inclined end edges that protrude along the circumferential direction as it moves toward both ends in the busbar direction, a pair of enlarged diameter members are interposed between the base end edge and the terminal end edge, By moving the cylindrical body from the center in the busbar direction toward both ends in the busbar direction, the base edge and the terminal edge are moved away from each other along the circumferential direction, thereby expanding the cylindrical body. Can be calibrated.

  Therefore, the annular elastic member fitted on the cylindrical body is pressed against the inner peripheral surface of the pipe, and the diameter is increased between the outer peripheral surface of the cylindrical body and the inner peripheral surface of the existing pipe. A cylindrical body can be held.

Further, the inclined end edge has a first inclined end edge on the busbar direction central portion side of the cylindrical body, and has a second inclined end edge continuously on both side end portions of the busbar direction. The inclination angle of the inclined edge is set larger than that of the second inclined edge.

  Therefore, the first inclined end edge can increase the degree of separation between the base end edge and the terminal edge with respect to the movement amount of the diameter-expanding member, and the second inclined end edge can reduce the degree of separation. Thus, immediately after the start of the movement of the diameter-expanding member, the diameter of the cylindrical member can be rapidly increased by moving the diameter-expanding member along the first inclined end edge, and the cylindrical body is externally fitted. The annular elastic member can be quickly brought close to the inner peripheral surface of the pipe line.

  Then, on the both ends of the cylindrical body in the generatrix direction direction, the base end edge and the terminal end edge are separated from the force that moves the diameter expanding member by moving the diameter expanding member along the second inclined end edge. The direction force can be increased.

  Therefore, it is possible to increase the force of expanding the diameter of the first inclined end edge, and it is possible to press the annular elastic member to the inner peripheral surface of the pipe line with the maximum force. Further, it is possible to reduce the force in the direction of returning the diameter-expanding member from the both ends in the busbar direction to the center in the busbar direction, and it is possible to hold the diameter-expanding member between the base end edge and the terminal edge.

The invention of claim 2 specifically specifies the configuration of the diameter-expanding member. According to this, the diameter-expanding member has a contact surface on which the separation portion abuts on the base edge and the terminal edge, respectively. The inner plate portion extends in a flat plate shape so as to face the inner peripheral surface on the proximal end side and the inner peripheral surface on the terminal end side of the cylindrical body, and the outer plate portion is on the proximal end side of the cylindrical body. The outer peripheral surface and the outer peripheral surface on the terminal edge side are configured to extend in a flat plate shape so as to face each other.

  Therefore, by inserting the base end edge and the end edge between the inner plate portion and the outer plate portion and bringing them into contact with the respective contact surfaces of the separating portion, the diameter-expanding member is made to have the base end edge and the end edge. It can be held in a state of being interposed between the two.

The invention of claim 3 specifically specifies the configuration of the abutment surface of the separating portion according to claim 2 , and according to this, the diameter-expanding member is disposed between the base end edge and the terminal end edge. By interposing and moving from the central portion in the busbar direction toward the both end portions in the busbar direction, the first abutting surface portion can be slid and brought into contact with the first inclined end edge over a predetermined length. Subsequently, the second contact surface portion can be slid by contacting the second inclined end edge over a predetermined length.

The invention of claim 4 specifically specifies the configuration of the cylindrical body and the diameter-expanding member. According to this, immediately after the start of the movement of the diameter-expanding member, the first end of the base end edge of the cylindrical body. The first abutting surface on the base end edge side of the enlarged diameter member is brought into contact with the inclined end edge, and the first abutting surface on the end edge side of the enlarged diameter member is brought into contact with the first inclined end edge of the cylindrical body. Can be touched.

  Then, on both side end portions in the generatrix direction, the second contact surface on the base end edge side of the diameter-expanding member is brought into contact with the second inclined end edge of the base end edge of the cylindrical body, and the end edge of the cylindrical body is contacted. The second contact surface on the end edge side of the diameter-expanding member can be brought into contact with the second inclined end edge.

  Therefore, the diameter-expanding member can be stably moved between the base edge and the terminal edge.

The invention of claim 5 specifically specifies the configuration of the cylindrical body and the diameter-expanding member, and according to this, the terminal edge is the inner peripheral surface side of the base edge by the diameter expansion of the cylindrical body. In the state in which the diameter-expanding member is engaged with the terminal edge until the terminal edge moves in the circumferential direction from the state of being wound in a cylindrical shape and moving to a position facing the space away from the base edge. Can be moved. Accordingly, when the diameter of the cylindrical body is increased, the diameter-expanding member can be easily disposed between the base edge and the terminal edge that are opposed to and spaced from each other. Therefore, it is possible to automate the work of attaching the repair covering to the pipe line.

The invention of claim 6 specifically specifies the configuration of the outer plate and the inner plate, and according to this, the end portion on the base end edge side of the outer plate portion is the end portion on the base end edge side of the inner plate portion. When the base edge is separated from the terminal edge by the enlarged diameter of the cylindrical body, the base edge is separated from the terminal edge by the inner diameter of the inner plate part and the outer plate. It can arrange | position between parts.

  Next, embodiments of the present invention will be described with reference to the drawings.

  1 is an exploded perspective view illustrating the configuration of the repair covering 10, FIG. 2 is a cross-sectional view illustrating the configuration of the annular elastic member 11, FIG. 3 is a development view of the cylindrical body 21, and FIG. FIG. 5 is a diagram illustrating the configuration of the diameter-expanding member 31, FIG. 5 is a schematic configuration diagram illustrating the configuration of the spreader 40, and FIGS. 6 and 7 are diagrams illustrating a method of mounting the existing pipe line 1. 10 is a diagram for explaining the engagement state of the base edge 24 and the terminal edge 25 and the diameter-expanding member 31, FIG. 11 is a view taken from the direction of III in FIG. 8, and FIG. FIG. 13 is a diagram viewed from an IV direction, and FIG. In FIG. 1, the arrow H indicates the horizontal direction, and the arrow U indicates the upward direction. In FIG. 4, an arrow F indicates the moving direction of the diameter expanding member 31.

  The covering 10 for repair is an existing pipe 1 such as a sewage pipe buried in the ground (see FIGS. 6 and 7), particularly cracks formed on the existing pipe 1 having a small diameter of 700 mm or less. As shown in the exploded perspective view of FIG. 1, it is composed of an annular elastic member 11, a cylindrical body 21, and a pair of diameter-expanding members 31.

  The annular elastic member 11 is mounted on the outer periphery of the cylindrical body 21, and has an annular shape that is pressed and adhered to the inner peripheral surface 2 of the existing pipeline 1 by the outer peripheral surface of the cylindrical body 21. Yes. Specifically, as shown in FIG. 2, a cylindrical sheet portion 12 having a predetermined thickness (for example, 10 mm) and covering the outer periphery of the cylindrical body 21, and on the outer periphery of both end portions of the sheet portion 12 Each has a ring-shaped ridge portion 13 which is formed so as to protrude along the circumferential direction and whose top portion is in close contact with the pipe inner peripheral surface 2.

  In the present embodiment, four ridges 13 are provided at both ends in the busbar direction, for a total of eight, and is an enlarged view of the main part (inside the round frame) of FIG. As shown in 2 (b), the cross section has a substantially trapezoidal shape. And the water swelling rubber | gum 14 which swells by absorbing a water | moisture content is used for the center two of each four on one side.

  The protruding portion 13 is not limited to the above-described configuration. For example, the protruding portion 13 may be formed of the same material as the sheet portion 12 without using the water swelling rubber 14. Moreover, the number of the protrusions 13 may be increased or decreased as appropriate, or the cross-sectional shape may be a semicircular shape.

  FIG. 2C and FIG. 2D illustrate another example of the ridge portion 13 and correspond to the main part of FIG. The protrusion 15 shown in FIG. 2C is formed integrally with the sheet 12 using the same material as that of the sheet 12, and has a substantially right triangle in cross section. The outermost protruding portions 15a and 15d are formed such that the oblique sides of the right triangle face each other and the bottom side is on the sheet portion 12 side. Further, the other ridges 15b and 15c protrude to a position higher than the ridges 15a and 15d, and the oblique sides of the right triangle are formed toward both ends in the generatrix direction. According to the protruding portion 15 having the above shape, water can be reliably prevented from entering between the inner peripheral surface 2 of the pipe line and the outer peripheral surface of the tubular body 21, and the water stop effect can be dramatically improved. be able to.

  The protrusion 16 shown in FIG. 2 (d) is formed integrally with the sheet 12 using the same material as the sheet 12, and has angled slopes 16a that are alternately continuous along the generatrix direction. Yes. A plurality of annular hollow portions 16b are provided in the ridge portion 16, and a viscous material such as a gas such as air or gas, a liquid such as water, an aqueous solution or oil, or a gel or viscose shape. 16c etc. are enclosed. According to the ridge portion 16 having the above shape, the ridge portion 16 can be pressed against the pipe inner peripheral surface 2 with a uniform pressure along the circumferential direction. Therefore, it is possible to prevent the seam portion from being displaced due to an earthquake or the like, and to prevent water leakage and sediment from flowing into the pipeline 1.

  The cylindrical body 21 is made of a metal material having excellent corrosion resistance such as stainless steel, copper, or a copper alloy, or a synthetic resin such as polyvinyl chloride, or a shape memory alloy or a shape memory synthetic resin material. It is wound in a spiral shape overlapping the inner peripheral surface side of the base end edge 24 and maintains a constant diameter that can be easily inserted into the pipe line 1 to be repaired with the annular elastic member 11 in an overview. The plate member 22 has a cylindrical shape capable of expanding the diameter.

  A pair of edge portions 23 are bent at the both ends of the cylindrical body 21 in the generatrix direction so as to accommodate the annular elastic member 11 from both sides. Thus, the annular elastic member 11 is protected from flowing water or the like flowing in the pipe line 1, and the strength of the pipe line 1 is improved by stiffening the cylindrical body 21.

  As shown in FIG. 3, which is a development view of the cylindrical body 21, the base end edge 24 and the terminal edge 25 of the cylindrical body 21 extend along the generatrix direction of the cylindrical body 21 and have symmetrical shapes. It is formed as follows.

  The base edge 24 has a central edge 24A extending along the generatrix direction of the cylindrical body 21 at the central part in the generatrix direction of the cylindrical body 21, and a central part side in the busbar direction continuous to both ends of the central edge 24A. And a pair of inclined end edges 24B projecting in the circumferential direction as they move away from each other toward both ends of the bus in the busbar direction.

  The central edge 24A has a substantially constant inclination angle with respect to the generatrix direction of the cylindrical body 21 so as to gradually protrude along the circumferential direction as it moves from the center in the generatrix direction of the cylindrical body 21 toward both ends. It is formed so as to extend linearly.

  As for a pair of inclination edge 24B, the 1st inclination edge 24B-1 is formed in the busbar direction center part side, and the 2nd inclination edge 24B-2 is formed in the busbar direction both-ends side. The first inclined end edge 24B-1 extends along the circumferential direction as it moves continuously from both ends of the central end edge 24A toward the both ends of the cylindrical body 21 from the center in the busbar direction toward the both ends in the busbar direction. In order to protrude gradually, it is formed to extend linearly at a substantially constant inclination angle larger than the central end edge 24A with respect to the generatrix direction.

  The second inclined end edge 24B-2 protrudes gradually along the circumferential direction as it moves from the central portion side in the busbar direction toward the both end portions in the busbar direction, continuously from the first inclined end edge 24B-1. It is formed to extend linearly at an inclination angle smaller than the first inclined end edge 24B-1 with respect to the direction.

  The terminal edge 25 extends from the central side in the busbar direction to the central edge 25A extending along the busbar direction of the cylindrical body 21 at the central portion in the busbar direction of the cylindrical body 21 and the both ends of the central edge 25A. It has a pair of inclined edge 25B which protrudes in the circumferential direction as it shifts in the direction away from each other toward the both end portions in the busbar direction.

  The central edge 25A has a substantially constant inclination angle with respect to the generatrix direction of the cylindrical body 21 so as to gradually protrude along the circumferential direction as it moves from the center in the generatrix direction of the cylindrical body 21 toward both ends. It is formed so as to extend linearly.

  As for a pair of inclination edge 25B, the 1st inclination edge 25B-1 is formed in the busbar direction center part side, and the 2nd inclination edge 25B-2 is formed in the busbar direction both-ends side. The first inclined end edge 25B-1 extends along the circumferential direction as it moves continuously from both ends of the central end edge 25A toward the both ends of the cylindrical body 21 from the center in the busbar direction toward the both ends in the busbar direction. In order to protrude gradually, it is formed to extend linearly at a substantially constant inclination angle larger than the central end edge 25A with respect to the generatrix direction.

  The second inclined end edge 25B-2 gradually protrudes along the circumferential direction as it moves from the central portion side in the busbar direction toward the both end portions in the busbar direction, continuously from the first inclined edge 25B-1, It is formed so as to extend linearly at an inclination angle smaller than the first inclined end edge 25B-1 with respect to the direction. Then, the inclination angle of the central end edge 25A with respect to the generatrix direction and the inclination angle of the second inclination end edge 25B-2 are the same.

  As shown in FIGS. 1 and 3, a contact plate member 26 is attached to the outer peripheral surface of the cylindrical body 21 so as to protrude in the circumferential direction from the base edge 24 by a predetermined length. The abutting plate member 26 reinforces the strength of the connecting portion between the base end edge 24 and the terminal end edge 25 of the cylindrical body 21, and a gap formed between the base end edge 24 and the terminal end edge 25 when the final diameter is expanded. The annular elastic member 11 is prevented from projecting to the inner peripheral surface side of the cylindrical body 21. The annular elastic member 11 is thinner than the cylindrical body 21 or has an equivalent thickness. Even in the expanded state, the plate member is configured to have a size that completely covers the space between the base edge 24 and the terminal edge 25.

  In FIG. 3, reference numeral 27 denotes a protruding portion that protrudes from the outer peripheral surface of the cylindrical body 21. The protruding portion 27 protrudes at a position separated by a predetermined distance along the central end edge 24A and the first inclined end edge 24B-1 of the base end edge 24, and the inner peripheral surface of the cylindrical body 21 and the contact plate A gap is formed between the member 26 and the outer plate 34 of the diameter-expanding member 31 (see FIG. 12).

  In FIG. 1 and FIG. 3, reference numeral 28 denotes a projecting portion that projects from the inner peripheral surface of the cylindrical body 21. The protruding portion 28 is provided along the central edge 25 </ b> A over a predetermined length at the central portion in the generatrix direction of the terminal edge 25.

  The pair of diameter-expanding members 31 are made of a metal material, a synthetic resin material, or the like, similar to the cylindrical body 21, and are respectively interposed between the base edge 24 and the terminal edge 25 of the cylindrical body 21. The diameter of the cylindrical body 21 is increased by moving the base edge 24 and the terminal edge 25 in the direction away from each other along the circumferential direction by moving from the central portion in the busbar direction toward both end portions in the busbar direction. It is configured.

  Specifically, as shown in the perspective view of FIG. 4A, an inner plate portion 32 that is curved so as to be in contact with the inner peripheral surface of the cylindrical body 21, and the inner plate portion 32. Is formed so as to be curved and so as to be in contact with the outer peripheral surface of the cylindrical body continuously with the separating portion 33, and the separating portion 33 extending along the moving direction of the diameter expanding member 31. An outer plate portion 34 extending with a gap into which the base edge 24 and the terminal edge 25 can be inserted is provided between the inner plate portion 32 and the inner plate portion 32.

  As shown in FIG. 4B, which is an I direction arrow view of FIG. 4A, the inner plate portion 32 has a base edge side 32 a and a terminal edge side 32 b along the moving direction of the diameter-expanding member 31. The front side 32c and the rear side 32d have a substantially rectangular shape in plan view extending in a direction orthogonal to the moving direction of the diameter-expanding member 31. A separating portion 33 is provided at a substantially central position of the inner plate portion 32 so as to extend along the moving direction of the diameter-expanding member 31.

  The separation portion 33 includes a base edge side contact surface 33a that can contact the base end edge 24 inserted between the inner plate portion 32 and the outer plate portion 34 over a predetermined length, and a terminal edge. And a terminal edge side abutting surface 33b that can be abutted over a predetermined length opposite to 25, and has a wedge shape that gradually separates from the front in the moving direction of the diameter-expanding member 31 toward the rear. Yes.

  The angle α formed between the base end side contact surface 33a and the terminal end side contact surface 33b of the separating portion 33 increases the diameter of the cylindrical body 21 so that the base end edge 24 and the terminal end edge 25 face each other. When formed, the angle is equal to the narrow angle formed between the second inclined edge 24B-2 of the base edge 24 and the second inclined edge 25B-2 of the terminal edge 25. .

  Further, the forward portion of the separating portion 33 in the moving direction is formed at a wider angle than the angle α so as to positively separate the base end edge 24 and the terminal end edge 25 by the movement of the diameter-expanding member 31. An angle β formed at the front portion in the moving direction of the separating portion 33 is formed between the first inclined end edge 24B-1 of the base end edge 24 and the first inclined end edge 25B-1 of the terminal end edge 25. You may form so that it may become an angle equal to this angle.

  The outer plate part 34 is formed to be thinner than the inner plate part 32, and the base edge side 34a, the front side 34c, and the rear side 34d are respectively set to the base edge side 32a of the inner plate 32, It is formed so as to extend along the front side 32c and the rear side 32d. The base edge side 34a of the outer plate part 34b extends in parallel with the base edge side contact surface 33a of the separation part 33 at a position closer to the separation part 33 side than the base edge side 32a of the inner plate part 32. It is formed to exist. And the front part of a moving direction is chamfered in circular arc shape so that it may continue smoothly to the front side 34c.

  Then, as shown in FIG. 4 (c), which is an II direction arrow diagram of FIG. 4 (a), a through hole 35 penetrating from the inner plate portion 32 to the outer flat plate portion 33 through the separating portion 34 is formed. ing. This through-hole 35 is for engaging a claw portion 44 of a spreader 40 described later, and has a round hole shape continuous with a constant diameter in the present embodiment. The through hole 35 may have a hole shape such as a long hole, a square hole, or an elliptical hole in addition to a round hole. Further, a locking portion that locks the claw portion 44 in the through hole 35 may be provided so that the claw portion 44 can be locked more firmly.

  Further, an engagement piece 36 projects from the inner edge 32 of the inner plate 32 toward the outer plate 34. The engagement piece 36 prevents the diameter-expanding member 31 from coming off the terminal edge 25 when the terminal edge 25 moves along the inner peripheral surface of the base edge 24 due to the diameter expansion of the cylindrical body 21. For this purpose, it has a height that forms a gap that is slightly wider than the thickness of the cylindrical body 21 between the outer plate portion 34 and the diameter-expanding member 31 of the end edge 25 of the cylindrical body 21. The protrusion 28 is provided at a position where the protrusion 28 can be disposed between the center edge 25A and the proximal edge contact surface 33b.

  The repair covering 10 having the above-described configuration is attached in the pipe line 1 by the spreader 40. As shown in FIG. 5, for example, the spreader 40 includes a body portion 42 that includes a plurality of wheels 41 and can move in the pipeline 1, and an expansion portion 43 is provided at each end of the body portion 42. Is provided. In the present embodiment, the inflating section 43 employs a structure that expands in a balloon shape by the supply of compressed air, but other pressure fluids may be used. Alternatively, an electric motor, a gear, It may have a structure that mechanically expands in the radial direction by a combination of the above.

  A pair of claw portions 44 protrude from the upper portion of the body portion 42 so as to be movable in the direction of the bus. In addition, a hydraulic cylinder 45 that accommodates the pair of claw portions 44 apart from each other in the busbar direction by supplying hydraulic pressure is housed inside the body portion 42. Further, a lift device 46 is provided in the body portion 42. The lift device 46 can lift the claw portion 44 and the hydraulic cylinder 45 upward by supplying hydraulic pressure to place the repair covering body on the upper portion of the inner peripheral surface of the pipeline. Yes.

  Next, the repair method of the existing pipe line 1 using the covering 10 for repair which has the said structure is demonstrated below.

  First, as shown in FIG. 8, a pair of enlarged diameter members 31 is set on the central edge 25A of the terminating edge 25 of the cylindrical body 21, and the terminating edge 25 is abutted against the abutting edge side contact surface 33b of the enlarged diameter member 31. The projecting portion 28 is disposed between the contact surface 33 b and the engagement piece 36. Then, the annular elastic member 11 is fitted on the cylindrical body 21 to form the repair covering 10.

  Next, the repair covering 10 is placed on the body portion 41 of the expansion device 40, and the claw portions 44 of the expansion device 40 are respectively inserted into the through holes 35 of the diameter expansion member 31 and attached to the expansion device 40. Then, the expanding portion 43 is expanded by compressed air supplied from a fluid source through a hose so that the repair covering 10 is not displaced with respect to the spreader 40 and is brought into pressure contact with the cylindrical body 21 to be repaired. 10 is fixed to the spreader 40, and the state is maintained.

  Subsequently, as shown in FIG. 6, the repair covering 10 and the spreader 40 were cleaned in advance on the inner peripheral surface, and were subjected to surface treatment to remove adhering mortar, mixed tree roots, and the like as necessary. It is moved by pulling the rope connected to the spreader 40 to a repair location (a joint portion, a crack or the like) in the pipeline 1. The repair covering 10 and the spreader 40 can be moved to a predetermined position by moving a TV camera (not shown) together with the repair covering 10 and monitoring the video from the TV camera with a monitor.

  Then, when the repair covering 10 and the spreader 40 are arranged at a repair location in the existing pipeline 1, the claw portion 44 and the hydraulic cylinder 45 are lifted upward by the lift device 46 at the repair location, and the repair cover 10. The upper part is brought into contact with the upper part of the pipe inner peripheral surface 2. Then, the supply of compressed air to the inflating portion 43 is started again to increase the diameter of the cylindrical body 21.

  Thereby, the diameter of the cylindrical body 21 is increased, and as shown by an arrow R in FIG. 11, the base edge 24 and the terminal edge 25 start to move away from each other along the circumferential direction. The diameter-expanding member 31 moves together with the end edge 25 while the outer plate portion 34 is in sliding contact with the inner peripheral surface of the cylindrical body 21 by the engagement piece 36 engaging with the protruding portion 27.

  Then, as shown in FIGS. 9 and 12, when the diameter of the central edge 24A is increased until the central edge 24A is spaced apart from the proximal edge side 34b of the outer plate portion 34 in the circumferential direction, the proximal edge side 34a of the outer plate portion 34 is The protruding portion 28 is disposed in a space formed between the abutting plate member and the base end edge 24, and the base end edge 24 is disposed to face the base end side abutting surface 33 b of the separating portion 33.

  Here, the hydraulic cylinder 45 is driven by the supply of hydraulic pressure, and the pair of claw portions 44 are moved away from each other. As a result, the diameter-expanding member 31 moves from the central portion in the generatrix direction of the cylindrical body 21 toward both end portions, and the central end edge 24A of the base end edge 24 is the base of the separating portion 33 as shown in FIG. It contacts the edge side contact surface 33a.

  The base edge side contact surface 34b slides in contact with the first inclined end edge 24B-1 of the base end edge 24, and the terminal edge side contact surface 32b contacts the first inclined end edge 25B-1 of the terminal edge 25. It slides in contact. Thereby, the base end edge 24 and the terminal end edge 25 are moved in the direction away from each other along the circumferential direction of the cylindrical body 21.

  Further, the inflating part 43 is further inflated in accordance with the movement of the claw part 44 by driving the hydraulic cylinder 45. By the expansion operation of the expansion portion 43, the diameter expansion operation by the diameter expansion member 31 can be assisted, and the diameter expansion of the cylindrical body 21 can be performed more smoothly. Therefore, the load on the hydraulic cylinder 45 can be reduced, and the use of a small hydraulic cylinder can reduce the weight and size of the entire apparatus.

  Then, when the diameter of the cylindrical body 21 is increased to such an extent that the ridge 13 of the annular elastic member 11 contacts the inner peripheral surface 2 of the pipe, this time, as shown in FIG. The contact surface 33a contacts and slides on the second inclined edge 24B-2 of the base edge 24, and the terminal edge side contact surface 33b of the separating portion 33 contacts the second inclined edge 25B-2 of the terminal edge 25. Slide. Thereby, the base end edge 24 and the terminal end edge 25 are moved in the direction away from each other along the circumferential direction of the cylindrical body 21. And the cylindrical body 21 contact | abuts the rib part 13 of the cyclic | annular elastic member 11 to the pipe inner peripheral surface 2, and the press to the pipe inner peripheral surface 2 of the cyclic | annular elastic member 11 is started.

  Then, as shown in FIG. 7, the annular elastic member 11 is pressed against the pipe inner peripheral surface 2 with a sufficient pressing force to compress and deform the protruding portion 13, and the cylindrical body 21, the pipe inner peripheral surface 2, When the diameter is expanded to the maximum diameter expanded state, which is a state of watertight joining between the two, the compressed air in the inflatable portion 43 is discharged, the inflatable portion 43 is contracted, and the inflatable portion 43 is removed from the pipe inner peripheral surface 2. At the same time, the supply of hydraulic pressure to the hydraulic cylinder 45 is stopped and the pressure is released, and the claw portion 44 and the hydraulic cylinder 45 are moved downward by the lift device 46 so that the through hole 35 and the claw portion 44 of the diameter expanding member 31 Release the engagement. Then, the spreader 40 is removed from the existing pipeline 1 together with the TV camera.

  When the locking of the claw portion 44 to the through-hole 35 is released by the downward movement of the lift device 46, the cylindrical body 21 of the repair covering 10 has its own restoring force and the elastic force of the annular elastic member 11. A force is applied to contract in a direction in which the base edge 24 and the terminal edge 25 are brought closer to each other.

  However, since the diameter-expanding member 21 is interposed between the base edge 24 and the terminal edge 25, the repair covering 10 is held in the maximum diameter-expanded state in the existing pipe line 1 and is cylindrical. There is no return to the diameter reduction direction of the body 21. Therefore, infiltration of ground water or the like between the pipe inner peripheral surface 2 and the annular elastic member 11 or flowing water flowing in the existing pipe 1 infiltrates between the seat portion 12 and the pipe inner peripheral surface 2. It is possible to secure a sufficient water-stopping effect.

  In particular, the angle α formed between the base edge side contact surface 33a and the terminal edge side contact surface 33b of the diameter expanding member 31 is such that the second inclined end edge 24B-2 of the base edge 24 and the terminal edge 25 are Since it is set equal to the angle formed between the second inclined end edge 25B-2, the proximal end side contact surface 33a and the end edge side contact surface 33b of the diameter-expanding member 31 are as shown in FIG. In addition, they abut against the second inclined end edges 24B-2 and 25B-2, respectively, in the longitudinal direction.

  Therefore, the sliding resistance between the base end edge side contact surface 33a and the end edge side contact surface 33b of the diameter increasing member 31 and the base end edge 24 and the end edge 25 of the cylindrical body 21 can be increased, and the diameter increasing member can be increased. 31 can be prevented from moving from both ends in the busbar direction toward the central portion in the busbar direction. Therefore, it is possible to prevent the cylindrical body 21 from returning in the diameter reducing direction, and to firmly hold the repair covering body 10 in the maximum diameter expanded state in the existing pipe line 1.

  Moreover, since there is no return to the diameter reduction direction of the cylindrical body 21, and the cylindrical body 21 can be held in the maximum diameter expanded state, for example, even when the cylindrical body 21 is expanded in a tapered shape, The both ends of the cylindrical body 21 in the generatrix direction can be pressed against the pipe inner peripheral surface 2 with equal pressing force.

  Therefore, the maximum fixing ability can always be exhibited, and the sheet portion such as the inflow of ground water or the like flowing between the pipe inner peripheral surface 2 and the annular elastic member 11 or the flowing water flowing in the existing pipe 1 can be obtained. Sufficient water stopping capability such as blocking the intrusion between the pipe 12 and the pipe inner peripheral surface 2 can be exhibited.

  According to the repair covering body 1 having the above-described configuration, the gap formed between the base end edge 24 and the terminal end edge 25 is narrower than usual due to an error in the inner diameter of the pipe inner peripheral surface 2, and the diameter increasing member. Even when the amount of movement of 31 is small, the repair covering 10 of the present invention moves the pair of diameter-expanding members 31 from the busbar direction central portion side toward the busbar direction both side end portions. The rear part of the diameter-expanding member 31 does not protrude from the both ends in the busbar direction of the cylindrical body 21 as in the case of moving the diameter-expanding member 31 from the both-ends side in the busbar direction toward the central part in the busbar direction. The entire diameter member 31 can be completely accommodated in the cylindrical body 20, and the dust flowing through the existing pipe line 1 can be prevented from being caught.

  Further, since the first inclined end edges 24B-1 and 24B-1 are set so that the inclination angle with respect to the generatrix direction is larger than the second inclined end edges 24B-2 and 25B-2, Immediately after starting the movement, the degree of separation between the base edge 24 and the terminal edge 25 with respect to the movement amount of the diameter expanding member 31 can be increased.

  Therefore, the diameter of the cylindrical body 21 can be rapidly increased with a short movement amount, and the length of the inclined end edge 24 in the generatrix direction can be shortened. Therefore, the length between the both ends of the cylindrical body 21 in the generatrix direction can be shortened, and the repair covering 10 can be reduced in weight and size.

  Further, in the present invention, when the diameter of the cylindrical body 21 is increased, the pair of diameter-expanding members 31 are moved away from each other toward the both ends of the cylindrical body 21 from the busbar central portion side. Therefore, a force in a direction of pulling along the generatrix direction of the cylindrical body 21 can be applied to the base edge 24 and the terminal edge 25.

  Therefore, it is possible to suppress the deformation of the cylindrical body 21 in the direction of the busbar line, rather than moving from the both ends of the busbar direction toward the central side in the busbar direction, and the diameter of the cylindrical body 21 can be easily increased. It has the effect of being able to.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, it is good also as a structure which hooks and moves the nail | claw part 44 to the rear-end part of the diameter-expansion member 31. FIG. According to this, it is not necessary to drill the through-hole 35 in the diameter-expanding member 31, the number of manufacturing steps of the diameter-expanding member 31 can be reduced, and cost reduction can be achieved.

It is a disassembled perspective view explaining the structure of the covering for repair. It is sectional drawing explaining the structure of a cyclic | annular elastic member. It is an expanded view of a cylindrical body. It is a figure explaining the structure of a diameter-expansion member. It is a schematic block diagram explaining the structure of a spreader. It is a figure explaining the attachment method in the existing pipe line. It is a figure explaining the attachment method in the existing pipe line. It is a principal part enlarged view explaining the positional relationship of the cylindrical body and diameter expansion member before diameter expansion. It is a principal part enlarged view explaining the positional relationship of the cylindrical body and diameter expanding member in the middle of diameter expansion. It is a principal part enlarged view explaining the diameter expanding method of the cylindrical body by a diameter expanding member. It is the figure seen from the III direction of FIG. It is the figure seen from the IV direction of FIG. It is explanatory drawing which shows the diameter-expanded state by a diameter-expanding member. It is a figure explaining a prior art. It is a figure explaining a prior art. It is a figure explaining a prior art. It is a figure explaining a prior art.

DESCRIPTION OF SYMBOLS 10 Covering body 11 Repairing elastic member 12 Sheet | seat part 13 Projection part 21 Cylindrical body 24 Base edge 24A Center edge 24B Inclined edge 24B-1 1st inclination edge 24B-2 2nd inclination edge 25 Termination Edge 25B Inclined end edge 25B-1 First inclined end edge 25B-2 Second inclined end edge 31 Diameter expanding member 32 Inner plate portion 33 Separating portion 33a Base end edge side contact surface 33b Terminal edge side contact surface 34 Outer plate portion 35 Through hole

Claims (6)

In the covering for repair that covers the inner peripheral surface of the existing pipeline and repairs the existing pipeline,
The plate member is curved in a cylindrical shape so that the base end edge and the end edge of the plate member are opposed to each other, and at least one of the base end edge and the end edge is directed from the center in the busbar direction toward both ends in the busbar direction. A cylindrical body having a pair of inclined end edges projecting along the circumferential direction as it moves,
An annular elastic member that is externally fitted to the cylindrical body and is mounted between the outer peripheral surface of the cylindrical body and the inner peripheral surface of the existing pipe line;
It is interposed between the base end edge and the end edge, and moves the base end edge and the end edge in the circumferential direction by moving from the center in the bus bar direction toward the both ends in the bus bar direction. A pair of diameter-expanding members that expand the diameter of the cylindrical body by moving in a direction away from each other,
I have a,
The pair of inclined edges are
A pair of first extending linearly at a substantially constant inclination angle so as to gradually protrude along the circumferential direction as it moves from the central portion side of the cylindrical body toward the both ends of the longitudinal direction in the busbar direction. 1 inclined edge;
Each of the first inclined end edges protrudes gradually along the circumferential direction as it moves from the busbar direction central portion side toward the busbar direction both end portions side, and is smaller than the first inclined end edge. A repair covering having a pair of second inclined end edges extending linearly at an inclination angle . The expanded member is
A separation portion having a contact surface that contacts the base end edge and the end edge by being interposed between the base end edge and the end edge of the cylindrical body;
An inner plate portion that is continuously formed at one end of the separation portion and extends in a flat plate shape so as to face the inner peripheral surface on the base end edge side and the inner peripheral surface on the terminal end side of the cylindrical body;
An outer peripheral surface on the proximal end side of the cylindrical body and a terminal end are formed continuously with the other end of the separation portion so as to extend substantially in parallel with the inner plate portion with a predetermined gap. The covering for repair according to claim 1, further comprising an outer plate portion extending in a flat plate shape so as to face the outer peripheral surface on the edge side. The separating portion of the diameter-expanding member is
A first contact surface extending opposite to the first inclined end edge over a predetermined length on the front side in the moving direction of the diameter increasing member, and the diameter increasing member continuous to the first contact surface The repair covering according to claim 2 , further comprising a second abutting surface extending opposite to the second inclined end edge over a predetermined length on the rear side in the moving direction. In the cylindrical body, the pair of inclined edges are provided on the base edge and the terminal edge,
The diameter-expanding member is provided at a location where the first contact surface and the second contact surface of the separation portion oppose the base end edge and a location facing the terminal end edge, and a second contact on the base end edge side. An angle formed between the contact surface and the second contact surface on the terminal edge side is an angle formed between the second inclined edge of the base edge and the second inclined edge of the terminal edge. 4. The repair covering according to claim 3 , wherein the repair covering is configured to have a wedge shape equal to a corner. The cylindrical body has a basic posture state in which the terminal edge overlaps with the inner peripheral surface side of the base edge and is wound in a cylindrical shape, and is in a radial direction at a position in the vicinity of the terminal edge and in the central portion in the busbar direction. Protruding part that protrudes toward the center side is provided,
The inner plate portion of the diameter-expanding member is engaged with the projecting portion of the cylindrical body when the diameter-expanding member is disposed at a central position in the generatrix direction of the terminal edge to expand the diameter of the cylindrical body. 5. The covering for repair according to claim 4 , wherein a hooking portion capable of moving the diameter-expanding member along the circumferential direction together with the terminal edge protrudes toward the outer plate portion. The expanded member is
The covering for repair according to claim 5 , wherein an end portion on the base end edge side of the outer plate portion extends beyond an end portion on the base end edge side of the inner plate portion.

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