JP2001050476A - Lining structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the slipping-out of elastic sealant from a lining tube surely without pressing the elastic sealant to the lining tube with strong pressure in particular. SOLUTION: In this lining structure, the end part of a lining tube B made of resin attached in a pipe A is inserted deeper than the end part of the pipe. And a cylindrical elastic sealant C is attached over the inside circumference surface of the pipe A and the inside circumference surface of the lining tube B. The cylindrical ring 3 attached inside of the elastic sealant C is plastically deformed along the expanding direction of the diameter, and the elastic sealant 3 is pressed on both of the inside circumference surface of the pipe A and the inside circumference surface of the lining tube B. In this case, the cylindrical ring 3 is deformed so as to engage on the protruded part 4 formed on the inside circumference surface of the tube B to prevent the slipping-out of the cylindrical ring 3 from the lining tube 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an inner peripheral surface of a pipe and an inner peripheral surface of the lining cylinder, wherein an end of a resin-made lining cylinder mounted in the pipe is inserted inside the end of the pipe. A cylindrical elastic seal material is mounted over the elastic seal material, and the cylindrical ring mounted inside the elastic seal material is plastically deformed in a radially expanding direction so that the elastic seal material is lined with the inner peripheral surface of the pipe and the lining. The present invention relates to a lining structure pressed against both the inner peripheral surface of a cylinder and the inner peripheral surface of the cylinder.

[0002]

2. Description of the Related Art When a hole is formed in a pipe due to corrosion or abrasion, the above-mentioned lining structure has a diameter increasing direction so that the hole does not communicate with the inside of the lining pipe through a space between the pipe and the lining pipe. The boundary between the pipe and the lining cylinder is sealed by pressing the elastic sealing material against both the inner peripheral face of the end of the pipe and the inner peripheral face of the end of the lining cylinder by means of a plastically deformed cylindrical ring. FIG. 5 shows a conventional lining structure, in which a cylindrical ring 3 plastically deformed so as to expand substantially uniformly along the cylinder axis direction. By pressing against the inner peripheral surface, the elastic sealing material C is prevented from coming out of the lining tube B by the frictional force between the elastic sealing material C and the lining tube B, and the cylindrical ring 3 is pulled out of the elastic sealing material C. It is blocked by the frictional force between the cylindrical ring 3 and the elastic sealing material C.

[0003]

Therefore, in order to reliably prevent the elastic sealing material C from coming out of the lining tube B, the elastic sealing material C must be strong against the inner peripheral surface of the lining tube B. It is necessary to plastically deform the cylindrical ring 3 so as to be pressed by the pressing force. However, when the cylindrical ring 3 is plastically deformed, when a force exceeding the pressure resistance acts on the pipe A or the lining cylinder B, Since the pipe A and the lining tube B may be deformed or broken, there is a disadvantage that it is difficult to reliably prevent the elastic sealing material C from coming out of the lining tube B. The present invention has been made in view of the above-described circumstances, and it is possible to reliably prevent the elastic sealing material from coming out of the lining cylinder without pressing the elastic sealing material against the lining cylinder with a particularly strong pressing force. The purpose is to do.

[0004]

According to a first feature of the present invention, an end of a resin-made lining tube mounted in a pipe is inserted inside the end of the pipe, and an inner periphery of the pipe is formed. A cylindrical elastic sealing material is mounted over the surface and the inner peripheral surface of the lining cylinder, and the cylindrical ring mounted inside the elastic sealing material is plastically deformed in a radially expanding direction to remove the elastic sealing material. A lining structure pressed against both an inner peripheral surface of the pipe and an inner peripheral surface of the lining cylinder, wherein the cylindrical ring is engaged with a protrusion formed on an inner peripheral surface of the lining cylinder. To prevent the cylindrical ring from coming out of the lining cylinder. [Operation] The cylindrical ring is deformed so as to engage with the protrusion formed on the inner peripheral surface of the lining cylinder, thereby preventing the cylindrical ring from coming out of the lining cylinder. Can be prevented by the frictional force between the elastic sealing material and the lining cylinder and the frictional force between the elastic sealing material and the cylindrical ring. Also, since a projection is formed on the inner peripheral surface of the lining cylinder and the cylindrical ring is deformed so as to engage with the projection, a concave portion is formed on the inner peripheral surface of the lining cylinder, and the concave portion is formed. It is easier to secure the thickness of the lining cylinder than in the case where the cylindrical ring is deformed so as to engage with the lining. [Effect] Therefore, the elastic sealing material can be reliably prevented from coming out of the lining cylinder without making the elastic sealing material press against the lining cylinder with a particularly strong pressing force. In addition, there is little possibility that the strength of the lining cylinder is impaired.

[0005] A feature of the invention according to claim 2 is that the cylindrical ring is deformed so as to engage with the protruding portion with the elastic sealing material interposed therebetween. [Operation] The elastic sealing material can be engaged between the lining cylinder and the cylindrical ring. [Effect] It is possible to more reliably prevent the elastic sealing material from coming out of the lining cylinder.

According to a third feature of the present invention, a thermoplastic resin resin tube which is folded and deformed in the radial direction is inserted into a ring member having an inner diameter smaller than the outer diameter of the lining tube. The lining tube is formed by expanding and deforming the inside of the pipe, and the protrusion is formed on the inner peripheral surface of the lining tube. [Operation] When the resin pipe is expanded and deformed inside the pipe to form a lining cylinder, the resin pipe portion inserted through the ring member does not expand and deform beyond the inner diameter of the ring member. The ring member is mounted on the resin pipe portion at the protrusion forming position corresponding to the above, and the protrusion can be formed at the mounting position. [Effect] The protruding portion can be easily formed at an appropriate position according to the length of the lining tube mounted in the pipe.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions. FIG. 1 shows a case in which a lining tube made of a vinyl chloride resin (an example of a lining tube made of a thermoplastic resin) B is installed in an existing gas pipe (an example of an existing pipe) A buried underground and the pipe A is reinforced. The lining structure shown is shown. The lining tube B is formed by inserting a vinyl chloride resin resin tube (an example of a thermoplastic resin resin tube) E that has been folded and deformed in the radial direction into the pipe A, and then press-fits the resin tube E to the inside with steam. It is expanded and deformed while being heated and pressurized, and is mounted in the pipe A. The both ends of the lining tube B are inserted inside the both ends of the pipe A, so that the inner peripheral surface of the pipe A and the lining tube B
A cylindrical elastic seal material C made of NBR is pressed against the inner peripheral surface of the cylinder.

The elastic sealing material C has a large-diameter outer peripheral portion 1 adhered to the inner peripheral surface of the pipe A and a small-diameter outer peripheral portion 2 adhered to the inner peripheral surface of the lining tube B in a stepwise manner. The cylindrical ring 3 made of aluminum alloy mounted on the inside is plastically deformed in the radial direction, and the deformed cylindrical ring 3 applies the elastic sealing material C to the inner peripheral surface of the end of the pipe A and the lining cylinder B. The boundary between the pipe A and the lining tube B is sealed by being pressed against both the inner peripheral surface of the end portion. The cylindrical ring 3 is formed to have substantially the same width as the elastic sealing material C, and the elastic sealing material C is sandwiched between the protrusions 4 formed on the inner peripheral surface of the lining cylinder B where the elastic sealing material C overlaps. The cylindrical ring 3 is plastically deformed so as to be engaged so as to prevent the tubular ring 3 from coming out of the lining tube B. When the projecting portion 4 expands and deforms the resin pipe E inside the pipe A to form the lining tube B, the resin pipe E before expanding and deforming has an outer diameter equal to the inner diameter of the pipe A. It is formed inside the ring member 5 by being expanded and deformed while being inserted through the metal ring member 5 having an inner diameter smaller than the outer diameter of the lining tube B.

A lining method for lining the inside of the pipe A with the lining tube B will be described with reference to FIGS. As shown in FIG. 2A, pits F1 and F2 are excavated at both ends of the lining section, and a reel 15 around which a resin tube E that has been radially folded and deformed is wound, and a steam supply pipe is provided inside the resin tube E. A work vehicle 18 equipped with a boiler 17 for supplying pressurized steam through 16 is kept near one pit F1 and a winch 19 is provided.
Is made to stand by near the other pit F2. And the pipe A exposed in each pit F1, F2
, And the ring member 5 is fitted and fixed at the protruding portion forming position near both cut ends, and then the towing wire W is inserted using a wire passing tool or the like, and one end of the towing wire W is winched. 19
And the other end of the reel 1
5 is connected to the tip of the resin tube E wound around.

The resin tube E is wound around a reel 15 so as to be able to be fed out to a reel 15 with its feeding side end sealed.
The winding side base is connected to the steam supply pipe 16. Then, while heating the resin tube E with steam supplied through the steam supply tube 16, the winch 19 is driven to wind up the tow wire W, and the resin tube E is connected to the pipe A.
2 (b)
As shown in (1), it is inserted through the entire length of the pipe A in the lining section.

Next, as shown in FIG. 2 (c), the pits F1 and F2 of the resin tube E are cut, and both ends are heated with a burner or the like to soften the ends while expanding the ends. The sealing member 21a, 21b made of rubber is attached by a tool or the like, and the steam supply pipe 22 is connected to a steam introduction hole formed in the closing member 21a on the pit F1 side. Steam is supplied to the inside of the resin tube E, and 1.7 kgf /
After expanding and deforming the entirety of the resin tube E in a heated and pressurized state in which the pressure is increased to about ² cm ² , the resin tube E is cooled in a pressurized state to form a running cylinder B as shown in FIG. The protrusion 4 is formed inside the ring member 5.

Next, as shown in FIG. 4A, the lining tube B is cut so that its end enters inside the end of the pipe A, and the inner peripheral surface of the pipe A and the lining tube B are cut. The elastic sealing material C is attached to the inner peripheral surface of the elastic sealing material C, and the cylindrical ring 3 is attached inside the elastic sealing material C. Note that an adhesive is applied to both the inner and outer surfaces of the elastic sealing material C in advance.

Next, as shown in FIG. 4B, a jig D is mounted inside the cylindrical ring 3. The expanding jig D is
A pressing member 7 which is divided into a plurality in the circumferential direction and is movable individually in the radial direction, a conical cam member 8 for pressing and moving the inner peripheral side of each pressing member 7 toward the radially outward side, A hydraulic cylinder 9 for moving the cam member 8 back and forth along the inner peripheral side of each pressing member 7 and a manual hydraulic pump 10 connected to the hydraulic cylinder 9 are provided. Is provided with an engaging deformation pressing portion 6 that plastically deforms so as to engage with the protruding portion 4.

Next, as shown in FIG. 4 (c), the hydraulic cylinder 9 is extended and the cam member 8 is moved in a direction protruding from the inner peripheral side of each pressing member 7, so that each pressing member is moved. 7 is moved radially outward, and the cylindrical ring 3 is plastically deformed in the radially expanding direction to press the elastic sealing material C against both the inner peripheral surface of the pipe A and the inner peripheral surface of the lining cylinder B. Then, the cylindrical ring 3 is plastically deformed so as to engage with the protruding portion 4, and the cylindrical ring 3 is engaged with the protruding portion 4 with the elastic sealing material C interposed therebetween.

[Other Embodiments] The lining structure according to the present invention is such that a projection is formed on the inner peripheral surface that enters inside the overlapping portion of the lining cylinder with the elastic sealing material, and the cylindrical ring is deformed so as to engage with the projection, The tubular ring may be prevented from coming out of the lining cylinder. 2. The lining structure according to the present invention is characterized in that a lining tube having a projection formed on an inner peripheral surface thereof is mounted in a pipe, and the cylindrical ring is deformed so as to engage with the projection. May be prevented from getting out of the room. 3. The lining structure according to the present invention deforms the cylindrical ring so as to engage with a protrusion formed intermittently on the inner peripheral surface of the lining cylinder along the circumferential direction, so that the cylindrical ring comes out of the lining cylinder. It may be blocked. 4. The lining structure according to the present invention, when forming a lining cylinder by expanding the diameter of a thermoplastic resin resin tube that has been radially folded and deformed inside the tube, forming a wrinkle along the circumferential direction as a protruding portion. May be formed. 5. The lining structure according to the present invention may be provided with a lining tube made of a thermoplastic resin other than a vinyl chloride resin, such as a polyethylene resin. 6. The lining structure according to the present invention expands and deforms the thermoplastic resin resin tube that is folded and deformed in the radial direction while being inserted through a ring member having an outer diameter smaller than the outer diameter of the lining cylinder. A projection may be formed on the inner peripheral surface of the lining cylinder. 7. The lining structure according to the present invention may be applied to a lining structure of a pipe for liquid such as for water supply or sewerage other than for gas supply.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a lining structure.

FIG. 2 is an explanatory view of a lining method.

FIG. 3 is a sectional view of a main part.

FIG. 4 is an explanatory diagram of a method of attaching an elastic sealing material.

FIG. 5 is a longitudinal sectional view of a main part of a conventional lining structure.

[Explanation of symbols]

 3 Cylindrical ring 4 Projection 5 Ring member A tube B Lining tube C Elastic sealing material E Resin tube

Claims (3)

[Claims] 1. An end portion of a resin lining tube mounted in a tube is inserted inside the end portion of the tube, and a cylindrical shape is formed over an inner peripheral surface of the tube and an inner peripheral surface of the lining tube. The elastic seal material is mounted, and the cylindrical ring mounted inside the elastic seal material is plastically deformed in the radial direction, so that the elastic seal material is formed on the inner peripheral surface of the pipe and the inner peripheral surface of the lining cylinder. Wherein the cylindrical ring is deformed so as to engage with a protrusion formed on the inner peripheral surface of the lining cylinder, and the cylindrical ring is displaced from the lining cylinder. Lining structure that prevents escape. 2. The lining structure according to claim 1, wherein the cylindrical ring is deformed so as to engage with the protrusion with the elastic seal material interposed therebetween. 3. A diametrically expanding and deforming thermoplastic resin pipe, which is inserted into a ring member having an inner diameter smaller than the outer diameter of the lining cylinder, is inserted inside the pipe. The lining structure according to claim 1, wherein the lining tube is formed, and the protrusion is formed on an inner peripheral surface of the lining tube.