JPH06285982A - Pipe lining material and method for repairing pipe - Google Patents

Abstract

PURPOSE:To provide a pipe lining material which is lightweight and inexpensive even when a sufficient amount of it is used to give a necessary lining thickness and can cure promptly and uniformly and to provide a method for repairing a pipe which enables repairing a large-sized pipe using the lining material. CONSTITUTION:A tubular intermediate layer 1A is formed by connecting small sized tubular resin absorbers 2; a lining material 1 is composed by sandwiching the intermediate layer 1 with inner and outer tubular resin absorbers. In repairing a pipe 4, the pipe lining material 1 is inserted into a pipe 4, and an open liner 9 is inserted reversely into the pipe lining material 1 by fluid pressure to press the pipe lining material 1 on the inner wall of the pipe 4. In this condition, a reversible tube 10 is inserted reversely into the resin absorber 2 of the intermediate layer of the lining material 1 by fluid pressure to feed a heating fluid into the reversible tube 10 so that a thermosetting resin injected in the pipe lining material 1 is cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe lining material suitable for repairing a large-diameter pipe line and a pipe line repairing method using the pipe lining material.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the earth is deteriorated, a lining is applied to the inner peripheral surface of the pipeline without excavating the pipeline to repair the deteriorated pipeline. A construction method has already been proposed (see, for example, Japanese Patent Application Laid-Open No. 60-242038) and put to practical use. That is, in this pipe repairing method, a pipe lining material made of a flexible tubular resin absorbent material impregnated with a curable resin is inserted into the pipe line while being inverted by fluid pressure, and the pipe lining material is inserted into the pipe. A method of lining the inner peripheral surface of an aged pipe with a cured pipe lining material by pressing against the peripheral surface and heating the pipe lining material while maintaining this state to cure the curable resin impregnated therein. Is.

[0003]

By the way, the pipe repairing method described above is used, for example, in a diameter range of φ1500 mm to φ3000 mm.
Large diameter pipes and 1000 mm x 1000 mm ~ 3
When applied to a rectangular box culvert of 000 mm x 3000 mm, a pipe lining material with a thickness of 30 mm to 50 mm (when the hydrostatic pressure is 0.2 to 0.3 Kg / cm ² ) is required. However, there is a problem that the weight increases and the cost increases.

If the pipe lining material is thick, the curing time of the curable resin impregnated in the pipe lining material becomes long. That is, since the curable resin that has already been cured serves as a heat insulating layer and blocks the heat conduction to the uncured resin, the curing time of the curable resin is long, for example, 30 hours to 50 hours, and in reality, the thickness is 42 mm or more. It was not possible to cure the sano tube lining material.

The present invention has been made in view of the above problems, and a purpose thereof is to provide a pipe lining which is lightweight and inexpensive, and which is capable of rapid and uniform curing even if a necessary thickness is secured. Is to provide wood.

Another object of the present invention is to provide a pipeline repairing method capable of repairing a large diameter pipeline using the above-mentioned pipe lining material.

[0007]

In order to achieve the above object, the present invention is to form a tubular intermediate layer by connecting a plurality of small-diameter tubular resin absorbents, and to form the inner layer into an inner / outer tubular resin. The pipe lining material is characterized in that it is sandwiched between absorbent materials to form a pipe lining material.

Further, according to the present invention, the pipe lining material is inserted into the pipe line, and the open liner is reversely inserted into the pipe lining material by fluid pressure to press the pipe lining material against the inner wall surface of the pipe line. While maintaining this state, the tube lining material is impregnated into the tube lining material by inserting the inverting tube by fluid pressure into the small-diameter resin absorbent material of the intermediate layer by fluid pressure and supplying the heating fluid into the inverting tube. It is characterized by curing a thermosetting resin.

[0009]

According to the present invention, since a plurality of cylindrical hollow portions made of a small-diameter tubular resin absorbent material are formed in the lengthwise direction in the middle layer of the hardened pipe lining material, a pipe having a particularly large diameter is formed. Even if the thickness required for the pipe lining material for lining the passage is ensured, the pipe lining material is light in weight, so that the material cost thereof is reduced and the cost is reduced.

Further, in the pipe lining material according to the present invention, since the thermosetting resin is cured by the heating fluid supplied to the plurality of cylindrical hollow portions formed in the intermediate layer, the intermediate layer is sandwiched. The thermosetting resin impregnated into the inner and outer double pipe lining materials cures quickly and uniformly at the same time.
As a result, efficient work becomes possible and the work period can be shortened.

[0011]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a pipe lining material 1 according to the present invention, and FIG. 2 is an enlarged detailed view of a portion A of FIG.

The pipe lining material 1 according to the present invention is for repairing a large-diameter pipe line, which is an intermediate layer 1A formed by connecting a plurality of small-diameter tubular resin absorbent materials 2 in series.
Is sandwiched between the inner and outer double tubular resin absorbents 1B and 1C, and the outer surface of the outer tubular resin absorbent 1C constituting the outer layer is coated with a highly airtight film 3. .

Next, a pipe line repairing method according to the present invention, which is carried out by using the pipe lining material 1, will be described with reference to FIGS. 3 to 5.

First, as shown in FIG. 3, a large-diameter conduit 4 is provided.
Insert the guide liner 5 into the guide liner 5
The pipe lining material 1 is inserted therein. Next, a predetermined amount of thermosetting resin 6 is injected into the pipe lining material 1, a vacuum hose 7 is inserted from one end of the pipe lining material 1 as shown, and the pipe lining material 1 is vacuumed by a vacuum pump 8. While pulling, the open liner 9 is reversed and inserted into the pipe lining material 1 by fluid pressure (air pressure in this embodiment).
Then, the pipe lining material 1 is spread by the open liner 9 and pressed against the inner wall of the pipe line 4, and at the same time,
The resin absorbent 6 is successively impregnated into the pipe lining material 1. At this time, by changing the pressure of the pressure fluid (compressed air) supplied into the open liner 9,
The thickness of the pipe lining material 1 is adjusted.

As described above, when the pipe lining material 1 is pressed against the inner wall of the pipe line 4 over the entire length thereof and the whole of the pipe lining material 1 is impregnated with the thermosetting resin 6, as shown in FIG. As shown in FIG. 3, the inversion tube 10 having high airtightness is applied to the small-diameter tubular resin absorbent material 2 of the intermediate layer 1A of the tube lining material 1 by fluid pressure (air pressure in this embodiment) while maintaining the state. Insert reverse.

When the reversal tube 10 is reversed and inserted into all the tubular resin absorbent materials 2 over the entire length thereof, the tubular resin absorbent materials 2 swell and the thickness of the tube lining material 1 increases. And open liner 9 and inversion tube 1
When a heating fluid such as hot air or steam is fed into the reversing tube 10 while keeping the internal pressure of 0 constant, the heat is simultaneously transmitted to the thermosetting resin 6 impregnated in the pipe lining materials 1B and 1C. Since these are heated, the thermosetting resin 6 impregnated in the pipe lining materials 1B and 1C is quickly and uniformly cured, and as a result, efficient work is possible and the work period can be shortened.

Finally, if the inversion tube 10 is pulled out or cut from the tubular resin absorbent material 2, the conduit 4 is formed.
Repair work is completed.

When the repair work of the pipeline 4 is completed as described above, the inner wall of the pipeline 4 is lined with the hardened pipe lining material 1. As shown in FIG. In the intermediate layer 1A, a plurality of cylindrical hollow portions 2a composed of a tubular resin absorbent material 2 having a small diameter are arranged in the longitudinal direction (see FIG. 5).
Pipe lining material 1
Even if the thickness required for lining the large-diameter pipe line 4 is secured, the pipe lining material 1 becomes light in weight, and therefore, the material cost thereof is lowered and the cost is reduced.
Even if the hollow portion 2a is present, if the pipe lining material 1 has a required thickness, the pipe lining material 1 has a necessary and sufficient moment of inertia of area. Will have sufficient bending strength and compressive strength.

[0020]

As is apparent from the above description, according to the present invention, a tubular intermediate layer is formed by connecting a plurality of tubular resin absorbents having a small diameter, and the intermediate layer is formed into a double inner / outer tubular resin. A pipe lining material is constructed by sandwiching it with an absorbent material, the pipe lining material is inserted into the pipe line, and the open liner is reversed by fluid pressure inside the pipe lining material to insert the pipe lining material into the pipe line. By pressing against the inner wall surface of the tube lining material and inserting the inverting tube by fluid pressure into the small diameter resin absorbent material of the intermediate layer of the pipe lining material while maintaining this state, and supplying the heating fluid into the inverting tube. Since the thermosetting resin impregnated in the pipe lining material is cured, it is possible to reduce the weight and cost of the pipe lining material even if the thickness required for the pipe lining material is secured. Quickly the pipe lining material enables and uniform curing, the effect is obtained that it easily even in line with a large diameter can be repaired.

[Brief description of drawings]

FIG. 1 is a perspective view of a pipe lining material according to the present invention.

FIG. 2 is an enlarged detailed view of a portion A of FIG.

FIG. 3 is a cross-sectional view showing the method of the present invention.

FIG. 4 is a cross-sectional view showing the method of the present invention.

5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Pipe Lining Material 1A Intermediate Layer 1B, 1C Tubular Resin Absorbing Material 2 Tubular Resin Absorbing Material 4 Pipeline 6 Thermosetting Resin 9 Open Liner 10 Inversion Tube

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Claims (2)

[Claims] 1. A tubular intermediate layer is formed by connecting a plurality of small-diameter tubular resin absorbent materials, and the intermediate layer is sandwiched between inner and outer double tubular resin absorbent materials. Pipe lining material to be used. 2. A pipe lining material constituted by connecting a plurality of small-diameter tubular resin absorbent materials to form a tubular intermediate layer, and sandwiching the intermediate layer between inner and outer double tubular resin absorbent materials in a sandwich form. Is inserted into the pipe line, and the pipe liner is pressed against the inner wall surface of the pipe line by reversely inserting the open liner into the pipe liner by fluid pressure. The inversion tube is fluid-pressure invertedly inserted into the resin absorbent having a small diameter of the layer, and the heating fluid is supplied into the inversion tube to cure the thermosetting resin impregnated in the pipe lining material. Pipe repair method.