JPH0673906B2 - Pipe repair method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipeline repairing method for repairing a pipeline by lining the inner peripheral surface of the pipeline.

[0002]

When a pipeline such as a sewer pipe buried in the ground is deteriorated, a pipeline repairing method for repairing the pipeline by lining the inner peripheral surface of the pipeline without excavating the pipeline. Has already been proposed and put to practical use (for example, JP-A-60
No. 242038). That is, this pipe repairing method is, for example, inserting a flexible pipe lining material impregnated with a thermosetting resin while reversing the pipe by hydraulic pressure, and pressing it against the inner peripheral surface of the pipe, , The water filling the pipe lining material is heated by steam etc. to make hot water, and the thermosetting resin impregnated in the pipe lining material is hardened by the hot water to harden the inner peripheral surface of the pipe line. It is a method of lining with wood.

However, in the above method, since it is necessary to heat all the water filled in the pipe lining material that is inverted and inserted into the pipeline to make it hot water, especially when the diameter of the pipeline is large or long. If it is long, it is necessary to heat a large amount of water, and heating of the boiler, hot water pump, etc.
There was a problem that the circulation equipment became large, the cost increased, and the construction time was long.

Therefore, as shown in FIG. 4, the pipe lining material 102 impregnated with a thermosetting resin is expanded in the pipe line 101 by air pressure, and the pipe lining material 10 is expanded.
2 is inserted into the hot water hose 106,
Has proposed a pipe line repairing method in which hot water is showered to cure the thermosetting resin impregnated in the pipe lining material 102 (Japanese Patent Application No. 3-137100).

According to the construction method proposed above, the pipe lining material 102 pressed against the inner peripheral surface of the pipe line 101.
Is uniformly heated by the hot water showered from the hot water hose to cure the thermosetting resin impregnated in it, so the heat energy required to heat the showered hot water is It is less than the heat energy required to heat all the water in the construction method, and the heating / circulation equipment such as boilers and hot water pumps is small and compact, and even if it has a large diameter or a long pipeline, this Can be repaired in a short period of time and at low cost.

[0006]

However, according to the above method, the showered warm water is collected at the bottom of the pipe lining material 102 inserted into the pipe 101 as shown in FIG. At the slack portion of the pipe 101 or at a downstream point, the hot water hose 106 sinks in the accumulated hot water, and at that part, the hot water is not vigorously showered from the hot water hose 106 into the air, and the pipe lining material 102 at that part is not. However, there is a problem that the curing is delayed and the heat generated by the curing cannot be suppressed.

The present invention has been made in view of the above problems, and an object thereof is to reliably shower hot water over the entire length of a pipeline even if the hot water hose is submerged. It is an object of the present invention to provide a pipe line repairing method capable of preventing a partial hardening delay of the pipe lining material and uniformly and simultaneously hardening the pipe lining material over the entire length.

[0008]

In order to achieve the above object, the present invention provides a tubular lining material, which is impregnated with a thermosetting resin and whose inner surface is covered with a highly airtight film, in a pipe line by air pressure. In addition to expanding, a hot water hose is inserted into the tubular lining material, and hot water is showered from the hot water hose to cure the thermosetting resin impregnated in the tubular lining material. A feature of the present invention is that a plurality of branch hoses, which are bendable and have a plurality of injection holes formed therein, are branched from appropriate portions of the hot water hose, and hot water is jetted from the branch hoses for showering.

[0009]

[Function] Since the branch hose branched from the hot water hose can freely bend when hot water is not supplied to the hose (that is, without pressure), it does not hinder the insertion of the pipe lining material into the pipeline. . Then, after the pipe lining has been installed in the pipeline, if hot water is supplied to the hot water hose, the branch hose stands up under the pressure of hot water even if the hot water hose is submerged in the water, Therefore, the hot water is vigorously ejected toward the inner peripheral surface of the pipe lining material from the injection hole opened in the portion of the branch hose exposed to the air, and the pipe lining material is evenly applied over its entire length. Warm.

Therefore, according to the present invention, the thermosetting resin impregnated in the pipe lining material is uniformly and simultaneously cured, and a partial curing delay of the pipe lining material can be prevented.

[0011]

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

FIG. 1 is a sectional view for explaining the method of the present invention, and FIG. 2 is a cutaway perspective view of the inside of the pipeline.

In the drawing, reference numeral 1 denotes a pipeline such as a sewer pipe buried in the ground, in which the thermosetting resin is impregnated in the pipeline 1 and the inner surface of which is highly airtight. The flexible pipe lining material 2 covered with is inverted and inserted by, for example, fluid pressure. The pipe lining material 2 is formed by preliminarily impregnating a flexible resin absorbent material obtained by sewing a nonwoven fabric into a tubular shape with a thermosetting resin (that is, before inserting it into the conduit 1). After the pipe lining material 2 is inserted into the pipe line 1, the pipe lining material 2 (more precisely, the resin absorbing material) may be impregnated with a thermosetting resin.

As shown in FIG. 1, the pipe lining material 2 reversely inserted into the pipe line 1 as described above has one end closed and the other end of the cylindrical fixture 3 installed on the ground. It is attached to the outer circumference. The upper surface of the fixture 3 is the G clamp 4
It is closed by the lid member 5 fixed by.

By the way, when the pipe lining material 2 is inverted and inserted into the pipe line 1, a hot water hose 6 having one end attached to the end of the pipe lining material 2 and a belt type are inserted into the pipe lining material 2. The rope 7 is pulled in at the same time. The belt type rope 7 is for flattening the bend of the pipe lining material 2, one end of which is tied to the end of the pipe lining material 2 and the other end of which is attached to the lid member 5. .

Thus, in this embodiment, a plurality of flexible and flexible parts are provided from an appropriate portion of a predetermined length portion (a portion corresponding to the length of the conduit 1) from the end portion of the hot water hose 6. Two branch hoses 9 formed by forming the injection holes 8 are branched. Specifically, each branch hose 9 is composed of a soft plastic hose with a diameter of φ3 / 4 inch to φ3 inch, and the two branch hoses 9 are connected to the hot water hose 6 by a branch hose socket 10. 1 along the length of hose 6
They are arranged at a pitch of m to 10 m. In this embodiment, the injection nozzle 11 is attached to the tip of each branch hose 9, but the tip of each branch hose 9 may be closed.

By the way, one end of the hot water hose 6 from which the branch hose 9 branches off from an appropriate place is attached to the end of the pipe lining material 2 (the right end in FIG. 1), and the other end is covered with the lid member 5. Penetrates and extends to the outside of the pipe lining material 2,
Hot water pump 1 provided in a water tank 12 installed on the ground
Connected to 3. A flexible valve 14 is provided at a portion where the hot water hose 6 penetrates the lid member 5 so as to be in close contact with the hot water hose 6 and maintain airtightness.

Thus, the pipe lining material 2 and the fixture 3
A portion surrounded by the lid member 5 and the lid member 5 constitutes a closed space S, and a hot water pump 15 driven by compressed air is arranged in the closed space S. Then, one end of a drainage hose 16 is connected to the discharge side of the hot water pump 15, and the other end of the hose 16 is sealed by passing through a flexible valve 17 for airtightness provided in the lid member 5. It extends out of the space S and faces above the water tank 12. Further, a compressor 18 for supplying compressed air for driving the hot water pump 15 is connected via a pipe 19, and the hot water pump 15 is exhausted by a pipe 2 for exhaust.
0 is drawn out, and the pipe 20 penetrates the lid member 5, extends to the outside of the closed space S, and opens to the atmosphere.

Further, another compressor 21 for supplying compressed air into the closed space S is installed on the ground, and a pipe 22 leading out from the compressor 21 is connected to the lid member 5 to be closed space S. It is open to. A pressure gauge 23 and a safety valve 24 are attached to the lid member 5.

On the other hand, a hot water pipe 25 which forms a circulation path extending from the bottom of the water tank 12 and facing above the water tank 12.
A hot water pump 26 and a boiler 27 are interposed in the middle of.

When the air compressor 21 is driven and compressed air is supplied into the closed space S through the pipe 22, the internal pressure of the closed space S increases and the tubular lining material 2 expands by the air pressure. As shown in FIG. 1, the inner peripheral surface of the conduit 1 is pressed. The internal pressure of the closed space S is kept below a predetermined value by the action of the safety valve 23.

Next, when the hot water pump 13 in the water tank 12 is driven while maintaining the above state, the hot water in the water tank 12 flows through the hot water hose 6 in the direction of the arrow in FIG. 1, and the hot water branches from the hot water hose 6. It is ejected from the ejection hole 8 formed in the branch hose 9. Then, the tubular lining material 2 is subjected to showering of warm water from the inside, the thermosetting resin impregnated in the tubular lining material 2 is heated by the warm water and hardened, and the inner peripheral surface of the conduit 1 is hardened. It is lined and repaired by.

By the way, the warm water used for heating the tubular lining material 2 by showering drops as shown in FIG. 1 and collects at the bottom of the tubular lining material 2, and the warm water hose 6 sinks into the water. The branch hose 9 branched from the hot water hose 12 stands up by the pressure of the hot water and is exposed to the air from the water surface. Therefore, the plurality of injection holes 8 and the branch hose 9 that are opened in the part of the branch hose 9 exposed to the air. Hot water is jetted vigorously toward the inner peripheral surface of the pipe lining material 2 from the injection nozzle 11 attached to the front end of the pipe lining material 2 to uniformly heat the pipe lining material 2 over its entire length.

Therefore, according to the present embodiment, the thermosetting resin impregnated in the pipe lining material 2 is uniformly and simultaneously cured, so that a partial curing delay of the pipe lining material 2 can be prevented.

A branch hose 9 branched from the hot water hose 6
Since it is flexible when hot water is not supplied to it (that is, without pressure), it does not hinder the insertion of the pipe lining material 2 into the pipe passage 1.

By the way, the hot water having a low temperature accumulated at the bottom of the pipe lining material 2 is pumped through the drain hose 16 by the hot water pump 15 being driven by the compressed air supplied from the compressor 18, and the water tank. Returned to 12. The hot water in the water tank 12 is the hot water pump 2
It is sent to the boiler 27 by 6, and again heated to a predetermined temperature by the boiler 27 and returned to the water tank 12. In this way, since the hot water in the water tank 12 is circulated through the hot water pipe 25 and heated by the boiler 27, its temperature is maintained at a predetermined temperature, and the hot water again passes through the hot water hose 6 to add the tubular lining material 2 to the hot water. Served for warmth. Therefore, the hot water circulates in one closed system.

Thus, according to this embodiment, in addition to the above-mentioned effects, the effects obtained by the construction method using showering of warm water (that is, energy saving, water tank 12, hot water pump 1)
3. The effect of being able to repair the heating / circulation equipment such as the boiler 27 in a short time and at low cost even if it has a large diameter or a long pipeline by making the heating / circulation equipment small and compact. Of course) is obtained.

Although an example of branching the two branch hoses 9 from the hot water hose 6 has been described above, three branch hoses 9 may be branched from the hot water hose 6 as shown in FIG. 3, or A greater number of branch hoses 9 may be branched.

[0029]

As is apparent from the above description, according to the present invention, a tubular lining material, which is impregnated with a thermosetting resin and whose inner surface is covered with a highly airtight film, is pneumatically pressured in a pipe line. In addition to expanding, a hot water hose is inserted into the tubular lining material, and hot water is showered from the hot water hose to cure the thermosetting resin impregnated in the tubular lining material. Since a plurality of branch hoses, which are bendable and have a plurality of injection holes, are branched from appropriate points of the hot water hose and hot water is jetted from the branch hoses to shower, even if the hot water hose is submerged in water. Even when it is sunk, hot water can be reliably showered over the entire length of the pipe line, preventing partial hardening delay of the tubular lining material and extending the tubular lining material over the entire length. To one, and, the effect is obtained that can be cured at the same time.

[Brief description of drawings]

FIG. 1 is a cross-sectional view for explaining a method of the present invention.

FIG. 2 is a cutaway perspective view of the inside of the conduit.

FIG. 3 is a cutaway perspective view of the inside of a pipe showing another embodiment of the present invention.

FIG. 4 is a cutaway perspective view of the inside of a pipe in a conventional pipe repair method.

[Explanation of symbols]

 1 Pipeline 2 Tubular lining material 6 Hot water hose 9 Branch hose 11 Injection nozzle

Claims (2)

[Claims] 1. A pipe lining material, which is impregnated with a thermosetting resin and whose inner surface is covered with a highly airtight film, is expanded in a pipe line by air pressure, and a hot water hose is inserted into the pipe lining material. In the pipe repairing method in which hot water is showered from the hot water hose to cure the thermosetting resin impregnated in the pipe lining material, a plurality of flexible injection holes are formed. The branch line hose is branched from an appropriate portion of the hot water hose, and hot water is jetted from the branch hose for showering. 2. A pipe line repairing method according to claim 1, wherein an injection nozzle is attached to the tip of each branch hose.