JP4976079B2 - Pipe inner surface water-stop device and its construction method - Google Patents

Description

  The present invention relates to an inner surface coating apparatus for covering a water leakage portion on an inner peripheral surface of an existing pipe line from the inner surface and stopping the water, and a construction method therefor.

  Various methods have been used to repair areas where water leaks due to cracks in pipes such as sewage and agricultural water, but such pipes are buried in the ground and dug up the soil. It is common practice to expose the leaking location and repair with water from a repair material.

  In addition, when an operator enters a pipe with a large-diameter pipe, a rubber or other sealing material is brought into the pipe, and the leaking part is pressed and repaired with a presser band or bolt. ing.

Furthermore, when repairing water leakage from the inner surface where a long crack or multiple cracks are generated in the length direction of the pipeline, it is necessary to cover the long cracks or multiple cracks as a whole. A long repair material is required for repair, and as this type of repair material, for example, those described in Patent Document 1, Patent Document 2, and the like have been proposed.
JP-A-8-277469 JP 2003-106476 A

  However, as shown in FIG. 14, the connecting cover 100 includes an elastic sleeve 101 and an expanded holding base 102, and the elastic sleeve 101 is provided with a protruding portion 103, as shown in FIG. The next connecting covering 100 is brought into pressure contact with 103 and connected to form a long repair material. In this repair material, the degree of connection between the elastic sleeves 101 when connecting them affects the water stoppage, so that skill is required and the work is difficult, and the elastic sleeve 101 and the extended holding base 102 are attached to the entire repair surface without any gaps. Therefore, there is a problem that the cost becomes high.

  Further, as shown in FIG. 15, the one described in Patent Document 2 is a method of binding a steel plate 211 in a roll shape with a string 212, carrying it in a manhole 210 connected to the pipe line 200, and removing the string 212 in the manhole 210. Except for expanding the diameter of the steel plate 211 in the existing pipe 200, welding the circumferential ends of the steel plate 211 to manufacture the reinforcing short pipe 215, and further welding the pipe axial direction end parts 216 of the reinforcing short pipe 215 to overlap each other. By repeating the above, the reinforcing pipe 217 is completed, and the flexible annular body 213 is arranged at both ends of the reinforcing pipe 217, and these are fixed to the inner surface of the reinforcing pipe 217 with the fixing band 214, thereby constructing an earthquake-resistant rehabilitation pipe. To do. The steel plate 211 used in this method is preferably made of stainless steel, but it is necessary to bring welding equipment into the manhole 210 and the pipe line 200 in order to weld the ends of the steel plate 211, and the welding work is also performed in the pipe line 200. It is necessary to perform high-watertight welding. Therefore, there is a problem that very high technology and equipment are required and the cost is high.

  The present invention is an apparatus for repairing a place where water leaks from a crack in a pipeline such as sewage, agricultural water, and rainwater, and its construction method, which is easy to install and does not require advanced technology such as in-pipe welding. These members are also simple and inexpensive, and provide a device that can repair a long water leakage point in a pipe and a construction method thereof.

That is, the pipe inner surface water-stop device of the present invention can be provided on the inner peripheral surface of the pipe in the pipe inner surface water-stop device that covers the inner peripheral surface of the existing pipe and stops the water. The flexible water-impervious cylindrical member and two stoppers that are expanded and fixed to the inner peripheral surfaces of both ends of the flexible water-impervious cylindrical member by extension bands to stop both ends of the flexible water-impervious cylindrical member. A water-tight joint , the water-stopper flexible joint has water-stop projections at least at both ends, and one end of the water-stopper flexible joint presses the flexible water-impervious cylindrical member. Water is stopped, and the other end presses the inner surface of the pipe to stop the water, and covers a portion between the two water-stopper flexible joints on the inner peripheral surface of the flexible water-impervious cylindrical member. It has a pressure-resistant cylindrical member.

Moreover, the construction method of the inner surface-covered water-stopping device of the present invention comprises a flexible water-impervious cylindrical member, a water-stopping flexible joint, and a pressure-resistant cylindrical member, and covers the inner peripheral surface of the existing pipe line to stop the water. In the construction method of a pipe inner surface covering water-stop device in a pipe, the flexible water-impervious cylindrical member is arranged along the inner peripheral surface of the pipe, and the flexible water-impervious cylindrical member is arranged. The two water-stopping flexible joints that are expanded and fixed by the extension bands are respectively pressed on the inner peripheral surfaces of the both ends of the water-proofing joint, and one end of the water-stopping flexible joint presses the flexible water-proof cylindrical member. The two water-stopping flexible joints are attached so that the other end presses the inner surface of the pipe to stop the water and both ends of the flexible water-proof cylindrical member are stopped. The pressure-resistant cylindrical member is attached so as to cover the space.

  According to the inner surface covering water stop device of the present invention and the construction method thereof, both ends of the flexible water-impervious cylindrical member provided on the inner peripheral surface of the existing pipe are respectively connected to the inner peripheral surfaces of these both ends. Two water-stopping flexible joints that are expanded and fixed by the expansion band stop water, and the pressure-resistant cylindrical member is located between the two water-stopping flexible joints on the inner peripheral surface of the flexible water-blocking cylindrical member. Since it covers, it is possible to repair the long or multiple leak points in the pipe with one water stop device, and even when the water stop device is carried into the pipeline from the ground, it is easy to carry in by dividing or folding, pipe welding etc. Therefore, it is easy to mount, and the structural members are simple, so that an inexpensive device can be obtained.

  In the present invention, the water stop flexible joint includes a flexible joint main body and the extension band, and the water stop flexible joint has water stop protrusions at least at both ends, and the water stop flexible. One end of the joint preferably presses the flexible water-impervious cylindrical member to stop water, and the other end presses the inner surface of the pipe to stop water.

  In the present invention, the expansion band of the water-stopper flexible joint has one or more cutting portions that are expanded by an expansion jig, and a spacer that fixes the cutting portion in an expanded state. And preferred.

  Furthermore, in the present invention, it is preferable that the pressure-resistant cylindrical member has one or more cutting portions that are expanded by an expansion jig and a spacer that fixes the cutting portions in an expanded state.

  In the present invention, it is preferable that the cut portion is provided with a cover plate having fixed portions fixed on both sides of the cut portion.

Embodiments of the present invention will be described below.
(Water stop flexible joint)
The waterproof joint according to the embodiment of the present invention includes a cylindrical flexible joint body made of an elastic material and an expansion band disposed inside the pipe. The flexible joint body is attached to the pipe wall by the expansion band. Pressed to exert a water stop effect. The elastic material can be selected from the group consisting of synthetic rubber such as styrene / butadiene rubber, EPDM, chloroprene rubber and urethane rubber, natural rubber, soft vinyl chloride resin and thermoplastic elastomer.

(Flexible fitting body)
The flexible joint body made of an elastic material has a cylindrical shape, and on the side in contact with the inner surface of the conduit, the end of the flexible water-proof cylindrical member is pressed to form the flexible joint body and the flexible water-proof cylindrical member. And at least a water stop protrusion that presses the inner surface of the pipe and stops the water between the flexible joint body and the inner surface of the pipe. Further, a water stop protrusion can be provided between them to increase the water stop.

(Expansion band and pressure-resistant cylindrical member)
The expansion band and the pressure-resistant cylindrical member in the embodiment of the present invention are each made of a rigid material and have a ring shape having a cutting portion, and the cutting portion is provided with a locking portion of an expansion jig. Extend the space between the ends of the expansion band with an expansion jig, and insert and fix stoppers of appropriate dimensions between the expanded ends. The locking portions on both sides of the stopper cover the stoppers. A cover plate to be fixed to is provided. The stopper, fixing pin, and cover plate, which are means for fixing the expanded state, are also made of a rigid material and can be selected in various shapes. The rigid material can be formed of a single material or a composite material such as stainless steel, rust-proof plated steel, rust-proof resin-coated steel, hard plastic, and fiber-reinforced plastic, and these are desirable because they hardly corrode.

(Flexible water shielding cylindrical member)
The flexible water-impervious cylindrical member according to the embodiment of the present invention is a cylindrical member that shields water between the water-stopper flexible joints, and is formed by forming a flexible sheet member into a cylindrical shape. Can be joined and molded into a cylindrical shape. The material of the flexible water-impervious cylindrical member is preferably selected from the same material as that of the flexible joint body, since it can be folded when it is carried into an existing pipe line from, for example, a 60 cm manhole cover. Moreover, if the protrusion part which protrudes in the pipe | tube center direction is provided in the both ends of a flexible water-proof cylindrical member, it will be useful for the positioning when attaching the water stop protrusion of a flexible joint main body.

(Expansion device)
The expansion device is also made of a rigid material, and includes, for example, a pair of arm portions having expansion claws that fit into the locking portions of the expansion band, a hydraulic jack that expands the arm portions, and a hydraulic pump.

  Next, embodiments of the present invention will be described in detail by way of examples with reference to the drawings. FIG. 1 shows one embodiment of the pipe inner surface water-stop device of the present invention and one embodiment of the construction method of the present invention for constructing the pipe inner surface water-stop device of the embodiment. 2 is an enlarged cross-sectional view showing an A portion of FIG. 1 in an enlarged manner, FIG. 3 is a cross-sectional view taken along the line BB in FIG. 1, and FIGS. FIG. 5A and FIG. 5B are a front view and a cross-sectional view showing a flexible water shielding cylindrical member of an inner pipe covering water stop device of an example, and FIGS. 5A and 5B are views of the inner pipe covering water stop device of the above embodiment. FIG. 6 is a perspective view showing a lower pressure-resistant dividing plate, and FIG. 7 is a mounting state shown in FIG. 3. It is explanatory drawing which shows the setting method of the said pressure | voltage resistant cylindrical member in the case.

  FIG. 8 is a cross-sectional view showing a state after assembly of the pressure-resistant dividing plate, and FIG. 9 is an explanatory diagram showing a method of attaching the pressure-resistant dividing plate of the two-divided pressure-resistant cylindrical member to the inner peripheral surface of the pipe with an expansion device FIG. 10 is an explanatory view showing a method of attaching a water-stopper flexible joint with a two-part expansion band, FIG. 11 is a cross-sectional view showing a state of one water-stopper flexible joint after attachment shown in FIG. FIG. 12 is a cross-sectional view showing a state of the other water-stopper flexible joint after installation shown in FIG. 10, and FIG. 13 is a perspective view showing another form of the flexible water-impervious cylindrical member. Reference numeral 1 denotes a pipe of an existing pipe line, and 3 denotes an inner surface covering water stop device of the pipe line of the above embodiment.

  As shown in FIG. 1, the pipe inner surface water-stop device 3 of this embodiment has a flexible water-impervious cylindrical member 4 and two water-stops that stop both ends of the flexible water-impervious cylindrical member 4. It comprises a water-resistant flexible joint 5 and a pressure-resistant cylindrical member 6 that covers a portion between the two water-stopping flexible joints 5 on the inner peripheral surface of the flexible water-impervious cylindrical member 4. The cylindrical member 4 is laid along the inner surface of the long tube 1 so as to cover a plurality of spaced cracks 7 generated on the inner surface of the tube 1 from the inside. It arrange | positions at the both ends of the flexible impermeable cylinder 4, respectively.

  In the pipe inner surface covering water stop device 3 of this embodiment, each of the two water stop flexible joints 5 presses the cylindrical flexible joint body 8 and the flexible joint body 8 against the pipe wall. And an annular water stop projection 9 provided at one end (right end in FIG. 2) of the outer peripheral surface of each flexible joint body 8. While the inner peripheral surface is pressed, an annular water stop protrusion 9 provided on the other end portion (left end portion in FIG. 2) of the outer peripheral surface of each flexible joint body 8 presses the inner peripheral surface of the pipe 1. The water-stopping state of the flexible water-impervious cylindrical member 4 and the water-stopping flexible joint 5 at both ends thereof is maintained.

  In this embodiment, the left water-stopper flexible joint 5 in FIG. 1 used for the connection portion 2 of the pipe 1 is a pipe shaft rather than the right water-stopper flexible joint 5 in FIG. A plurality of annular water stop protrusions 9 are also provided between the water stop protrusions 9 provided at both ends of the outer peripheral surface of the flexible joint body 8. Therefore, when the connection part 2 of the pipe 1 is in the repair part, as shown in FIG. 2, if the center position in the width direction of the wide waterproof joint 5 is attached to the connection part 2, Even when displacement occurs in the connection part due to ground subsidence, the water stop flexible joint 5 follows and deforms, and the water stop state can be maintained by these water stop protrusions 9.

  In the pipe inner surface water stop device 3 of this embodiment, the annular projecting portions 14 projecting radially inward as shown in an enlarged view in FIG. 2 at both ends of the flexible water shielding cylindrical member 4. Each of the two water-stopper flexible joints 5 has a water-stop projection 9 (at the right end in FIG. 2) at one end of the flexible joint main body 8, and the flexible water-proof cylindrical member 4. The projecting portion 14 is engaged with each other to improve the water tightness of the end portion of the flexible water-impervious cylindrical member 4, and the water-stoppable flexible joint 5 is separated from the flexible water-impervious cylindrical member 4 in the event of an earthquake or ground subsidence. To prevent.

  Since the flexible water-impervious cylindrical member 4 is made of an elastic material, a swell that erodes the inner circumferential cross section of the pipe due to water pressure such as groundwater entering from the crack 7 or the like occurs. As shown in FIG. 3, the pressure-resistant cylindrical member 6 disposed between the water-stopping flexible joints 5 at both ends presses the inner peripheral surface of the flexible water-impervious cylindrical member 4 so that the flexible shielding is achieved. The water cylindrical member 4 is prevented from being swollen and can withstand water pressure.

  Each of the expansion band 10 and the pressure-resistant cylindrical member 6 of each water-stopper flexible joint 5 has one or more cutting portions 30, but it is preferable to have two or more cutting portions for bringing into the pipe line from the ground. . The pressure-resistant cylindrical member 6 shown in FIGS. 3 to 8 is an example of a three-part type having three cut portions, the pressure-resistant cylindrical member 6 shown in FIG. 9 and the expansion band 10 shown in FIGS. 10 to 12 have two cut portions. This is an example of a two-part type having In the example shown in FIG. 3, expansion is performed on both sides of each of the three cut portions 30 of the three-part pressure-resistant cylindrical member 6 disposed inside the flexible water-impervious cylindrical member 4 laid in the pipe 1. A claw receiving portion 12 is provided, and a spacer 11 is inserted between the extended claw receiving portions 12 on both sides of the cutting portion 30 as described later, and the cover plate 13 extending over the extended claw receiving portions 12 on both sides is provided. Are attached with bolts 25, and the expanded state of the cutting portions 30 is maintained.

  The pressure-resistant cylindrical member 6 shown in FIG. 3 is composed of three pressure-resistant divided plates 15, and the lower pressure-resistant divided plate 15 among them is provided with both end portions in the circumferential direction as shown in FIGS. 5 and 6. The extended claw receiving portion 12 is provided by fixing two strip-like thick plates having screw holes 18 for attaching the cover plate 13 with a space therebetween, and further, with respect to the pressure-resistant dividing plate 15. As shown in FIG. 1, in order to facilitate the joining with other pressure-resistant dividing plates 15 installed adjacent to each other in the circumferential direction and the tube axis direction, circumferential auxiliary plates 16 are provided at both ends in the circumferential direction. And a tube axis side auxiliary plate 17 is provided at one end in the tube axis direction.

  Further, as shown in FIG. 7, in one of the three pressure-resistant divided plates 15 (shown in the upper left in FIG. 7), the circumferential auxiliary plate 16 is provided only at one end in the circumferential direction. Only the point is different from the lower pressure-resistant dividing plate 15, and the other points are the same as the pressure-resistant dividing plate 15 below. The remaining one of the three pressure-resistant divided plates 15 (shown in the upper right in FIG. 7) differs from the lower pressure-resistant divided plate 15 only in that the circumferential auxiliary plate 16 is not provided. In this point, it has the same structure as the pressure-resistant dividing plate 15 below.

  When the pressure-resistant cylindrical member 6 is arranged in the state shown in FIG. 3, as shown in FIG. 7, first, the lower pressure-resistant dividing plate 15 is first placed at the lower portion, and then the remaining two pressure-resistant dividing plates 15 are placed below. The end portions on the side are respectively slid and inserted on the circumferential auxiliary plate 16 of the lower pressure-resistant dividing plate 15, and one pressure-resistant dividing plate 15 provided only at one end portion of the circumferential auxiliary plate 16 is inserted. If the last pressure-resistant dividing plate 15 is attached in the same manner after the cover plate 13 is temporarily fixed to the pressure-resistant dividing plate 15 below, the work is easy.

  In addition, as shown in FIG. 8, the end portions of the pressure-resistant cylindrical member 6 are folded outwardly for reinforcement in the circumferential direction and the radial direction, and reinforcing folds 19 are provided.

  When expanding the pressure-resistant cylindrical member 6 arranged inside the flexible water-impervious cylindrical member 4 as described above, the extension claw holders on both sides of the three cut portions 30 are firstly expanded. The spacer 11 is inserted between the portions 12 and the cover plates 13 extending to the extended claw receiving portions 12 on both sides are attached with bolts 25 to make the cutting portion 30 in an expanded state. Thereafter, the remaining one cutting portion 30 The extended claw receiving portions 12 on both sides are expanded with an expansion device as will be described later, the spacer 11 is inserted into the cut portion 30, and the cover plates 13 extending over the extended claw receiving portions 12 are attached to the extended claw receiving portions 12 with bolts 25. Maintain expanded state.

  When the pressure-resistant cylindrical member 6 is of a two-divided type and includes two pressure-resistant divided plates 15, the pressure-resistant cylindrical member 6 disposed inside the flexible water-impervious cylindrical member 4 is arranged as shown in FIG. When expanding, the spacer 11 is inserted between the extended claw receiving portions 12 on both sides of the cutting portion 30 at one of the two cutting portions 30 (the right side in FIG. 9). The cover plate 13 extending over them is attached to the extended claw receiving part 12 with bolts 25 so that the cutting part 30 is in an expanded state, and then the remaining one part (the left part in FIG. 9) is expanded on both sides. Two expansion claws 21 of the expansion device 20 are inserted into the claw receiving portion 12, and a hydraulic jack 23 having two arm portions 22 fixed to the distal ends of the expansion claws 21 is swingable, for example, manually. Supply hydraulic pressure from the hydraulic pump 24 and The two arm portions 22 are pushed by the hydraulic jack 23 to widen the distance between the two extended claws 21, the distance between the extended claw receiving portions 12 on both sides of the cutting portion 30, and the circumferential width of the cutting portion 30. The spacer 11 is inserted into the cut portion 30 and the cover plate 13 is attached to the extended claw receiving portions 12 on both sides with bolts 25 to maintain the expanded state. In the case of the above-described three-divided pressure-resistant cylindrical member 6, the distance between the extended claw receiving portions 12 on both sides of the cutting portion 30 and the circumferential width of the cutting portion 30 are expanded in the same manner. The spacer 11 is inserted and the cover plate 13 is attached to the extended claw receiving portions 12 on both sides with bolts 25 to maintain the expanded state.

  The expansion band 10 shown in FIG. 10 is composed of two pressure-resistant divided plates 15, and the lower pressure-resistant divided plate 15 among them has a circumferential direction similar to the lower pressure-resistant divided plate 15 of the pressure-resistant cylindrical member 6. The extended claw receiving portion 12 is provided at both ends of the plate, and is formed by fixing two strip-like thick plates having screw holes 18 for attaching the cover plate 13 with a space between each other. In order to facilitate the joining with the other pressure-resistant dividing plate 15 installed on the upper side adjacent to the circumferential direction with respect to 15, circumferential auxiliary plates 16 are provided at both ends in the circumferential direction. Yes. The other upper pressure-resistant dividing plate 15 differs from the lower pressure-resistant dividing plate 15 only in that the circumferential auxiliary plate 16 is not provided, and the other pressure-resistant dividing plate 15 is otherwise lower. It has the same configuration as

  Even when each flexible joint body 8 is pressed against the pipe wall with the extension band 10, as shown in FIG. 10, the lower pressure-resistant dividing plate 15 is first placed at the lower portion, and then another pressure-resistant dividing plate 15 is placed. The two end portions are slid onto the circumferential auxiliary plate 16 of the lower pressure-resistant dividing plate 15 and inserted. However, one end portion is temporarily fixed to the lower pressure-dividing plate 15 with the cover plate 13 before the other. If the end is attached, the operation is easy. After the expansion band 10 is arranged inside each flexible joint main body 8 in this way, the expansion claw receiving portions on both sides of the cutting portion 30 are expanded by the expansion device 20 in the same manner as the pressure-resistant cylindrical member 6 shown in FIG. 12 and the circumferential width of the cutting portion 30 is expanded, the spacer 11 is inserted into the cutting portion 30, and the cover plate 13 extending over them is attached to the extended claw receiving portions 12 on both sides with bolts 25 to expand the expanded state. maintain. This expanded state is shown in FIGS.

  The flexible water-impervious cylindrical member 4 is a seamless cylindrical member. However, as shown in FIG. 13, a sheet joining portion 27 at the end of a sheet 26 made of an elastic material is used as a joint tape. A cylinder formed by joining and sealing at 28 may be used. Further, as described above, the following pressure-resistant cylindrical member 6 is further attached to the water-stoppable joint 5 of the inner surface-covered water-stop device 3 shown in FIG. A continuous water stop structure can be obtained by sequentially attaching the water stop flexible joint 5.

  According to the pipe inner surface covering water stop device 3 of this embodiment having such a configuration and the construction method of this embodiment for constructing the apparatus, the flexibility provided on the inner peripheral surface of the pipe 1 of the existing pipe line. Two water-stopping flexible joints 5 that extend and fix the both ends of the water-impervious cylindrical member 4 to the inner peripheral surfaces of the both ends by the expansion band 10 respectively stop the water-impervious cylindrical member 4. Since the pressure-resistant cylindrical member 6 covers a portion of the inner peripheral surface between the two water-stopping flexible joints 5, a single water-stopping device 3 repairs the long or a plurality of water leakage points 7 in the pipe 1. Even when the water stop device 3 is carried into the pipe line from the ground, it is easy to carry in by dividing or folding, and it is easy to install without requiring advanced techniques such as in-pipe welding. It can be a device.

  Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described examples, and can be appropriately changed within the scope of the claims. For example, the pressure-resistant cylindrical member 6 and the expansion band The plurality of pressure-resistant divided plates constituting the same may be the same as each other. Also, the two water stop flexible joints 5 may be the same.

  Thus, according to the inner surface covering water stop device of the present invention and its construction method, the both ends of the flexible water-impervious cylindrical member provided on the inner peripheral surface of the existing pipe are connected to the inner peripheral surfaces of these both ends. Two water-stopping flexible joints, each of which is expanded and fixed by an expansion band, stop water, and a portion between the two water-stopping flexible joints on the inner peripheral surface of the flexible water-blocking cylindrical member is a pressure-resistant cylindrical member. Therefore, it is possible to repair the long or multiple leak points in the pipe with one water stop device, and even when carrying the water stop device from the ground to the pipe line, it is easy to carry in by dividing or folding, and welding in the pipe Such an advanced technology is not required, and it is easy to mount, and since the constituent members are simple, an inexpensive device can be obtained.

It is sectional drawing which shows one Example of the construction method of this invention which constructs one Example of the inner surface covering water stop apparatus of the pipe line of this invention, and the inner surface covering water stop apparatus of the pipe line of the Example. It is an expanded sectional view which expands and shows the A section of FIG. It is sectional drawing which follows the BB line of FIG. (A), (b) is the front view and sectional drawing which show the flexible water shielding cylindrical member of the inner surface covering water stop apparatus of the pipe line of the said Example. (A), (b) is the front view and top view which show the downward pressure | voltage resistant division | segmentation plate which comprises the pressure | voltage resistant cylindrical member of the 3 division type of the inner surface covering water stop apparatus of the pipe line of the said Example. It is a perspective view which shows the said pressure | voltage resistant division | segmentation plate below. It is explanatory drawing which shows the setting method of the said pressure | voltage resistant cylindrical member at the time of setting it to the attachment state shown in FIG. It is sectional drawing which shows the state after the assembly | attachment of the said pressure | voltage resistant division plate. It is explanatory drawing which shows the method of attaching the pressure | voltage resistant dividing plate of the pressure | voltage resistant cylindrical member of the two division | segmentation type | mold pressure-resistant cylindrical member of the inner surface covering water stop apparatus of the said Example by an expansion apparatus. It is explanatory drawing which shows the method of attaching a water stop flexible joint with a 2 division type expansion band. It is sectional drawing which shows the state of one water stop flexible joint after the attachment shown in FIG. It is sectional drawing which shows the state of the other water stop flexible joint after the attachment shown in FIG. It is a perspective view which shows another form of a flexible water-impervious cylindrical member. It is sectional drawing which shows an example of a prior art. It is a disassembled perspective view which shows another example of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe | tube 2 Connection part 3 Inner surface coating | coated water stop apparatus 4 Flexible water-proof cylindrical member 5 Water-stopper flexible joint 6 Pressure-resistant cylindrical member 7 Crack 8 Flexible joint main body 9 Water-stop protrusion 10 Expansion band 11 Spacer 12 Expansion Claw receiving part 13 Cover plate 14 Protruding part 15 Pressure-resistant dividing plate 16 Circumference side auxiliary plate 17 Pipe axis side auxiliary plate 18 Screw hole 19 Reinforcement folding 20 Expansion device 21 Expansion claw 22 Arm part 23 Hydraulic jack 24 Hydraulic pump 25 Bolt 26 Sheet 27 Sheet joint part 28 Joint tape 30 Cutting part 100 Covering body 101 Elastic sleeve 102 Expansion holding base 103 Projection part 200 Pipe line 210 Manhole 211 Steel plate 212 String 213 Flexible annular body 214 Fixed band 215 Reinforced short pipe 216 Pipe shaft Direction end 217 Reinforcement pipe

Claims (5)

In the inner surface covering water stop device of the pipe that covers the inner peripheral surface of the existing pipe and stops the water,
A flexible water-impervious cylindrical member provided on the inner peripheral surface of the pipe;
Two flexible water-tight flexible joints that are expanded and fixed to the inner peripheral surfaces of both ends of the flexible water-impervious cylindrical member with expansion bands to stop both ends of the flexible water-impervious cylindrical member , The water stop flexible joint has water stop protrusions at least at both ends, and one end of the water stop flexible joint presses the flexible water-insulating cylindrical member to stop water, and the other end. Presses the inner surface of the pipe to stop the water,
An inner surface-covered water-stopping device comprising a pressure-resistant cylindrical member that covers a portion between the two water-stopping flexible joints on an inner peripheral surface of the flexible water-blocking cylindrical member. The expansion band of the water stop flexible joint is:
One or more cutting sections that are expanded with an expansion jig;
A spacer for fixing the cutting portion in an expanded state;
The inner surface-coated water stop device according to claim 1, wherein The pressure-resistant cylindrical member is
One or more cutting sections that are expanded with an expansion jig;
A spacer for fixing the cutting portion in an expanded state;
The inner surface-coated water stop device according to claim 1, wherein the water stop device has an inner surface. 4. The inner surface-coated water-stop device according to claim 2 , wherein the cut portion is provided with a cover plate having fixing portions fixed to both sides of the cut portion. An inner surface covering water stop device for a pipe that includes a flexible water-impervious cylindrical member, a water-stopping flexible joint, and a pressure-resistant cylindrical member and covers the inner peripheral surface of the existing pipe to stop the water. In the construction method,
Arranging the flexible water shielding cylindrical member along the inner peripheral surface of the pipe,
Two water-stopper flexible joints that are expanded and fixed by expansion bands on the inner peripheral surfaces of both ends of the flexible water-impervious cylindrical member are provided at one end of the water-stopper flexible joint. The water-impervious cylindrical member is pressed to stop water, and the other end is attached to press the inner surface of the pipe to stop water ,
Stop water at both ends of the flexible water-impervious cylindrical member,
The construction method of an inner surface-covered water stop device, wherein the pressure-resistant cylindrical member is attached so as to cover between the two water stop flexible joints.

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