JPH1080951A - Cylindrical lining material with flange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a lining material with a flange which is inverted and inserted into a sewerage branch pipe etc., for revival and repairing and to enable the flange to be contacted closely with the inside of a main pipe irrespective of the diameter of the main pipe. SOLUTION: A ring-shaped flange part 22 is attached to one end of a tubular resin absorbing material 21 impregnated with a thermosetting resin to form a lining material. Especially, the flange part 22 is composed of a radially projected piece 25 in which one end of the absorbing material 21 is folded radially toward the outside over its whole circumference, porous metal rings 26 which are fixed on both surfaces of the piece 25, and a flexible member 27 which covers the piece 25 and the rings 26. In particular, in the flexible member 27, ring-shaped grooves 28 are formed concentrically with the opening part H of one end of the absorbing material 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flanged lining material used for repairing pipes such as aged sewer pipes, and more particularly to repairing a branch pipe branched from the main pipe. A flanged cylindrical lining material whose portion is adapted to a main pipe of various diameters.

[0002]

2. Description of the Related Art Conventionally, when pipes such as sewer pipes buried underground are deteriorated, without excavating the pipes,
A construction method in which lining is applied to the inner peripheral surface for repair is generally widely used.

[0003] As such a repair method, Japanese Patent Laid-Open No. 4-35 is disclosed.
Various methods disclosed in, for example, Japanese Patent No. 5115 are known. For example, most of the branch pipes branching from a main pipe of a sewer and extending to a residential area are repaired using a dedicated lining material. It is.

[0004] The lining material for a branch pipe impregnates a thermosetting resin into a tubular resin absorbent made of synthetic paper such as felt paper or nonwoven fabric, and coats the inner and outer peripheral surfaces with a water-resistant plastic film or the like. The resin absorbent material is covered with a flange having a required diameter at one end in the longitudinal direction.

According to this branch pipe lining material, the flattened resin absorbent material is passed through the main pipe, and the flange is locked from the main pipe side to one end of the branch pipe. A pressure fluid is sent from the side, and the resin absorbent is inserted into the branch pipe while inverting the resin absorbent using the pressure of the pressure fluid, and the heat is impregnated while keeping the required pressure and closely contacting the inner peripheral surface of the branch pipe. By curing the curable resin, the inner peripheral surface of the branch pipe can be hardened and rehabilitated.

There are various types such as those using compressed air or pressurized water as the pressurized fluid. As the one using compressed air, for example, as shown in JP-A-4-355115, a peeling tube is temporarily fixed to a resin absorbent material, In some cases, the peeling tube is communicated with a pressure bag disposed in the main pipe, and compressed air can be sent from the ground into the resin absorbent through the peeling tube from the pressure bag.
As a means for curing the thermosetting resin, there is a method of injecting hot water into the resin absorbent while keeping the internal pressure of the resin absorbent, and curing the resin absorbent.

[0007]

However, according to the above-mentioned conventional lining material, the flange portion is made of epoxy resin in order to prevent the lining material from being drawn into the branch pipe by fluid pressure at the time of reverse insertion. Since it is made of a main hard material, it is necessary to form flanges in various forms according to the diameter of the pipeline.

For example, in a sewer main pipe, the diameter is 200 to
In order to lock the flange to such various main pipes at one end side of the branch pipe in a state of being in close contact with the inner peripheral surface of the main pipe, the form should be changed to the inner circumference of the main pipe. Must match the curvature of the surface. In addition, if the shape of the flange portion is incompatible with the inner peripheral surface of the main pipe, a gap is formed at that portion, which causes water leakage.

Therefore, in order to form various flanges whose curvature changes according to the diameter of the main pipe, molds of the same number as the kinds are prepared, and the molds are used to cure epoxy resin or the like, thereby forming various flanges. Since the hard flange is formed, the work is cumbersome and costly.In addition, there are many cases where the flange does not adhere to the main pipe due to errors in the pipe diameter or measurement errors when using it. It is necessary to prepare various types of lining materials in response to the contract, especially if the combination of the size of the resin absorbent material that fits the diameter of the branch pipe and the flange that fits the curvature of the main pipe, the type of lining material There are also dozens of types, and these have to be kept in stock, so the cost burden is large, and there are also cases where storage places are troublesome.

Accordingly, the present invention has improved a flanged lining material mainly used for repairing a sewer branch pipe,
It is an object of the present invention to provide a flanged tubular lining material in which a resin absorbent can be inverted and inserted into a branch pipe in a state where a flange portion is in close contact with an inner peripheral surface of the main pipe regardless of the diameter of the main pipe.

[0011]

According to the present invention, there is provided a flanged tubular lining material in which a flange portion is provided at one end of a tubular resin absorbent material impregnated with a thermosetting resin.
The flange portion is a radial protrusion in which one end of the resin absorbent material is bent radially outward over the entire circumference thereof; a porous metal ring fixed to both surfaces of the radial protrusion; A plurality of annular grooves formed concentrically with an opening at one end of the resin absorbing material, wherein the annular member is formed of a protruding piece and a flexible member covering the metal ring. The present invention provides a flanged tubular lining material characterized in that:

Here, the flexible member has such a degree of flexibility that when the resin absorbent is turned upside down into the conduit, it is deformed together with the metal ring by the insertion pressure and adheres to one end of the conduit. In addition, it refers to all members having a resistance not to be drawn into the pipeline even at the above-mentioned insertion pressure. Specifically, when a resin absorbent is inserted into a branch pipe using a pressure fluid of 1 kg / cm2. The member is such that the flange is deformed by the pressure without being drawn into the branch pipe and closely adheres to the inner peripheral surface of the main pipe, and includes, for example, an elastomer such as a soft resin or a synthetic rubber.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view showing an example of repair work of a sewer pipe as an example of use of a flanged tubular lining material according to the present application, and FIG. 2 shows a part of FIG. 1 in an enlarged manner.

In FIG. 1, 1 is a main pipe of a sewer buried underground, 2 is a branch pipe branched from the main pipe 1, and a manhole 3 leading to the main pipe 1 is drilled from the ground.

In such a pipeline, for example, in order to repair the inner peripheral surface of the branch pipe 2 to eliminate cracks and corrosion, the self-propelled camera 6 and the reversing device 5 to which the pressure pipe 4 is connected are required. The manhole 3 is introduced into the main pipe 1. At this time, a winch 8 is set on the manhole 3 and its wire 9 is connected to the pressure tube 4 and the reversing device 5 respectively, and the pressure tube 4 and the reversing device 5 are used to display an image of the self-propelled camera 6. Pull it into a predetermined position of the main pipe 1 while watching.

On the other hand, vehicles 10 and 11 stand by near the manhole 3 on the ground, respectively, and a camera 12 is introduced into the branch pipe 2 from the ground. And the self-propelled camera 6 in the main pipe 1
And the camera 12 in the branch pipe 2 are connected to the vehicle 10 by a cable 13, respectively, so that the internal state of the main pipe 1 and the branch pipe 2 can be checked on a monitor (not shown) mounted on the vehicle 10.

The other vehicle 11 is a boiler vehicle equipped with a compressor (not shown). The compressor of the vehicle, the pressure pipe 4 and the inside of the reversing device 5 are connected to an air hose 14,
15 respectively.

Here, the lining material 20 according to the present invention is:
As shown in FIG. 2, it is housed inside the reversing device 5 and a part thereof is exposed to the outside and positioned near the outlet 2a of the branch pipe 2. The position adjustment is performed by operating the winch 8 while watching the monitor of the vehicle 10.

The reversing device 5 has a structure in which a fluid chamber tube 5b is provided on the outer peripheral portion of the support tube 5a and a reversal mechanism (not shown) is built in one end of the support tube 5a. The support pipe 5a is rotated in the circumferential direction by operating the reversing mechanism in a state where the fixture 5c is installed outside the support pipe 5a and the fixture 5c is fixed to the inner peripheral surface of the main pipe 1 as shown in FIG. And can be moved in the axial direction. Thus, the opening 5a 'provided in the support pipe 5a can be accurately positioned so as to face the outlet 2a of the branch pipe 2. The fluid chamber tube 5b also has an opening 5b 'corresponding to the opening 5a' of the support tube 5a, and one end of a guide tube 5d is connected to the opening edge thereof.
A protective tube 5e having one end fitted to the opening 5a 'of the support tube 5a is provided on the outer peripheral side. The other end of the guide tube 5d is fixed to the end of the protective tube 5e, and that portion is connected to the pressure tube 4 in an airtight state.

The lining material 20 has a flange 22 on one end side in close contact with the outer surface of the opening 5b 'of the fluid chamber tube 5b, and the other end of the lining material 20 is opened from the openings 5a', 5b '.
We are drawn into d. FIG. 1 shows the fluid chamber tube 5b.
Is connected to one end of an air hose 15, and one end of an air hose 14 is connected to the pressure pipe 4. For this reason, in the state shown in FIG.
b, the compressed air expands and comes into close contact with each other in a state where the outlet 2a of the branch pipe 2 and the openings 5a 'and 5b' communicate with each other. When the compressed air is pressure-fed to the guide tube 5 d through the lining member 20, the lining material 20 can be inserted into the branch pipe 2 while being inverted by the pressure.

Finally, by feeding a heat medium such as hot water into the branch pipe 2, the thermosetting resin impregnated in the lining material 20 is hardened, and the inner peripheral surface of the branch pipe 2 becomes hard. It becomes a film.

FIG. 3 shows a lining material 20 of the present invention used in this kind of pipeline rehabilitation repair work. Reference numeral 21 denotes a tubular resin absorbing material substantially equal to the inner diameter of the branch pipe, and 22 denotes a flange provided at one end thereof. It is.

The resin absorbent 21 is made of synthetic paper or nonwoven fabric such as felt paper impregnated with a thermosetting resin such as unsaturated polyester or vinyl ester, and has a required length so as to cover the entire length of the branch pipe. is there. In particular, one end on the side of the flange portion 22 is inverted to a state protruding outside the flange portion during use, and the inside thereof is a pressure pocket 23 for storing a pressure fluid such as compressed air or pressurized water.

FIG. 4 is a sectional view taken along line AA in FIG. As shown in this figure, the inner and outer surfaces of the resin absorbent 21 are coated with a plastic film 24 made of polyethylene, nylon, or the like so that the resin absorbent 21 can be protected from water immersion or the like when inserted into a pipeline. It is.

On the other hand, the flange 22 has a ring shape protruding to the outer peripheral side of the resin absorbent 21 and is integrally fixed to one end of the resin absorbent 21. Its inner diameter is substantially equal to the diameter of the resin absorbent 21 and its outer diameter is 1.1 to 3 times the diameter of the resin absorbent 21.

FIG. 5 shows a cross section taken along line BB in FIG. As shown in this figure, the flange portion 22 is formed by radially projecting one end of the resin absorbent 21 outwardly over the entire circumference thereof, and is fixed to both surfaces of the radial projecting member 25. Porous metal ring 26 and radial projection 2
5 and a flexible member 27 that covers the metal ring 26, and when the resin absorbent 21 is inserted into the branch pipe in an inverted manner, the flange 22 is positioned at one end of the branch pipe. The tube is locked in close contact with the inner peripheral surface of the tube.
For example, when the resin absorbent 21 is inserted into the branch pipe using a pressure fluid of 1 kg / cm 2, the flange 22 is deformed by the pressure without being drawn into the branch pipe and closely adheres to the inner peripheral surface of the main pipe. I am trying to do it.

Here, the radial projecting piece 25 is
A cut is made at one end of the base material 1 at a required interval using a cutting tool or the like, and the length of the cut is used as a folding width to make the resin absorbent 21
Is formed by bending one end outward over the entire circumference.

The metal ring 26 has a thickness of 0.3 to 2 mm.
It is formed of a metal plate (for example, a steel plate such as SUS303) having a diameter of about mm and has an inner diameter substantially equal to the diameter of the resin absorbent 21. In particular, this metal ring 26 is shown in FIG.
As shown in the figure, the film is formed in a porous shape having a plurality of through-holes 26a and has a required deformability. Then, according to the metal ring 26, the radially protruding piece 25 is firmly fixed to both surfaces of the radial projecting piece 25 with a synthetic resin adhesive or the like so as to be concentric with the opening H at one end of the resin absorbent 21. Radial projection 2
5 and a metal ring 26 are covered with a flexible member 27.

Here, as the flexible member 27, an elastomer, a soft resin, or the like can be used. Among these, synthetic rubber, natural rubber, recycled rubber, and acrylic resin can be used as the elastomer. May be EVA, soft polyethylene, polybutene, or the like.

In particular, synthetic rubbers include acrylonitrile-butadiene rubber (NBR) called nitrile rubber, diene-based synthetic rubbers such as styrene-butadiene rubber, butadiene rubber, isoprene rubber, chloroprene rubber, butyl rubber, ethylene-propylene rubber, and the like. Olefin-based synthetic rubber such as acrylic rubber, urethane rubber, silicone rubber, fluorine rubber, and polysulfide rubber can be used. In NBR, the content of acrylonitrile is 43% or more of very high nitrile, 36 to 42% of high nitrile, 31 to 35% of medium to high nitrile, 25 to 30%.
% Of medium nitrile and 24% or less of low nitrile, but it is preferable to use medium or low nitrile which is soft in hardness.

As the soft resin, there is a synthetic resin impregnated with a plasticizer, such as a soft resin obtained by impregnating polyvinyl chloride as a synthetic resin with 20 to 150% by weight of dioctyl phthalate as a plasticizer. Vinyl is raised. Note that another thermoplastic resin or thermosetting resin as a synthetic resin can be impregnated with a plasticizer such as a phosphate ester type, an adipate type ester, a polyester, or a nitrile rubber. For example, there are various soft synthetic resins such as soft polyurethane and soft polystyrene as the soft resins obtained thereby.

Incidentally, these flexible members 27 are welded to the surface of the radial protruding piece 25 and the metal ring 26 in the mold. At this time, an annular projection (not shown) is attached to the mold. Are formed, and both surfaces 27 of the solidified flexible member 27 are formed.
An annular groove 28 as shown in FIG. 3 or FIG. This annular groove 28 is made of the resin absorbent 2
1 and concentric with the opening H at one end of the flexible member 27.
Are formed over the entire surface of the flexible member 27. Thus, the deformability of the flexible member 27 can be remarkably improved by the annular groove 28. As another example of the formation of the annular groove 28,
After the flexible member 27 is solidified, both sides of the surface may be cut into a ring with a knife or the like at a certain depth. The annular groove 28 is formed on both surfaces 27a and 27b of the flexible member 27.
It is preferable to form this on only one side of the flexible member 27. Here, when the annular groove 28 is formed on the surface 27a of the flexible member 27, the flange 2
2 and the other lining material applied to the main pipe 1, the annular groove 28 is formed on the surface 27b of the flexible member 27. Thus, the adhesiveness to the inner peripheral surface of No. 1 is improved.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the lining material according to the present invention is used not only for repairing branch pipes in sewers, but also for repairing waterworks and various fluid transport pipes. Of course, you can.

[0034]

As is apparent from the above description, according to the present invention, since a flexible member such as NBR is used as a constituent material of the flange portion, for example, when lining a sewer branch pipe, There is no danger of water leakage because the flange portion comes into close contact with the inner peripheral surface of the main pipe at one end of the branch pipe due to the insertion pressure of the resin absorbent into the branch pipe. Since the flange can be brought into close contact with the surface, it is not necessary to form various flanges corresponding to the diameter of the main pipe or the like, and the effect of increasing productivity is obtained.

Further, since a plurality of annular grooves are formed in the flexible member, the deformability thereof is improved, and the gripping property is also improved. Therefore, the degree of adhesion of the flange to the inner peripheral surface of the conduit is improved. Can be significantly improved.

Further, since the metal ring is provided as a constituent member of the flange portion inside the flexible member, there is no danger that the flange portion will be pulled in by the insertion pressure of the resin absorbent into the branch pipe or the like. Is formed into a porous shape having a plurality of through holes, so that it is highly deformable and does not hinder the deformation of the entire flange. In addition, since the metal ring is porous, the flexible member, the radial projection, and the metal ring can be firmly integrated.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of repairing a sewer branch pipe as an example of using a lining material according to the present invention.

FIG. 2 is a partially enlarged view showing a part of FIG. 1 in an enlarged manner;

FIG. 3 is a perspective view showing a pipe lining material according to the present invention.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is a sectional view taken along line BB in FIG. 3;

FIG. 6 is a perspective view showing a metal ring used for a flange portion of the lining material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main pipe 2 Branch pipe 20 Lining material 21 Resin absorption material 22 Flange 25 Radial projection 26 Metal ring 27 Flexible member 28 Annular groove H Opening

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location B29L 23:00

Claims (1)

[Claims] 1. In a tubular tubular lining material provided with a flange at one end of a tubular resin absorbent material impregnated with a thermosetting resin, the flange portion covers one end of the resin absorbent material over the entire circumference thereof. A radial protruding piece radially bent outward, a porous metal ring fixed to both surfaces of the radial protruding piece, and a flexible member covering the radial protruding piece and the metal ring. A flanged tubular lining material, wherein a plurality of annular grooves are formed in the flexible member so as to be concentric with an opening at one end of the resin absorbent material.