JP2635515B2 - Pipe lining 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 pipe lining method for repairing a pipe by lining the inner peripheral surface of an old pipe.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried underground is deteriorated, the pipeline is repaired by lining its inner peripheral surface without excavating the pipeline from the ground. A known pipe lining method is known.

[0003] That is, in the pipe lining method, a pipe lining material formed by impregnating a curable resin into a flexible tubular nonwoven fabric whose outer peripheral surface is covered with a highly airtight film is placed in a pipe by fluid pressure. By inserting while inverting, pressing the pipe lining material against the inner circumferential surface of the pipe, heating the pipe lining material while maintaining this state, and curing the curable resin impregnated in this, This is a method of lining the inner peripheral surface of a pipeline.

[0004] When the curable resin impregnated in the pipe lining material is a thermosetting resin, conventionally, a heating medium such as hot water or steam is directly filled in the pipe lining material which is reversely inserted into the pipe line. Then, the thermosetting resin is heated and cured by the heat medium.

[0005]

However, when hot water, for example, is directly filled into the pipe lining material as a heat medium as in the prior art, a large amount of hot water is required due to the large filling amount, and the heating equipment becomes large. In addition to poor workability, there is a problem that a large amount of energy is required and the cost is increased.

In the case where steam is used as a heat medium, particularly in a pipe having slack, condensed warm water stays in a slack portion of the pipe, and a large amount of cooling water or the like is required at the time of cooling.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to perform simple and inexpensive lining of a pipeline using a small amount of a heat medium with good workability. It is an object of the present invention to provide a pipe lining method capable of lining a pipe line having slack in a similar manner.

[0008]

In order to achieve the above-mentioned object, the present invention provides a method for inserting a pipe lining material impregnated with a thermosetting resin into a pipe by inverting the pipe lining material by a fluid pressure, and then introducing a fluid pressure into the pipe lining material. In the pipe lining method, the pipe lining material is heated while the pipe lining material is pressed against the inner peripheral surface of the pipe, and the thermosetting resin impregnated therein is cured. A reel device having a hollow rotary shaft having two chambers defined therein is housed in a pressure vessel installed on the ground, and a hot water pipe is connected to each chamber formed on the hollow rotary shaft of the reel device via a swivel joint. And the ends of one hot water hose are connected to each other, the pipe lining material and the hot water hose connected to one end thereof are wound around a hollow rotary shaft of a reel device, and the other end of the pipe lining material is connected. To Compressed air is supplied into the pressure vessel while being attached to the opening of the pressure vessel, and the pressure of the compressed air causes the pipe lining material to be invertedly inserted into the pipe line, and interlocks with the inverted insertion operation of the pipe lining material. The hot water hose is drawn into the pipe lining material, and air pressure is applied to the inside of the pipe lining material, and the hot water is circulated through the hot water hose while the pipe lining material is pressed against the inner peripheral surface of the pipe. It is characterized in that the material is heated.

[0009]

According to the present invention, there is no need to directly fill the pipe lining material which is reversely inserted into the pipe line with the heat medium as in the prior art, and a small amount of hot water hose which is drawn into the pipe lining material is circulated. Since the thermosetting resin impregnated in the pipe lining material can be heated and hardened by warm water, the cost can be reduced by energy saving, downsizing of facilities, etc., and workability is improved. .
When a part (lower part) of the thermosetting resin is heated by the hot water circulating through the hot water hose and the part starts to be cured, the other part of the thermosetting resin is sequentially heated by its own curing heat. For this reason, the entire thermosetting resin is uniformly heated and hardened uniformly, so that there is no problem such as distortion of the cured pipe lining material and deformation of the pipe lining material.

Further, according to the present invention, since the warm water does not circulate in the warm water hose and flows directly into the pipe lining material, the warm water does not stay in the slack portion in the slack pipe. In addition, post-treatment of hot water is not required, and a line having slack can be similarly lined.

[0011]

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

1 to 3 are sectional views showing the method of the present invention in the order of steps, FIG. 4 is an enlarged detailed view taken along line AA of FIG. 1, and FIG. 5 is an enlarged sectional view taken along line BB of FIG.

In FIG. 1, reference numeral 1 denotes a pipeline such as a sewer pipe buried in the ground, and a manhole 2 is opened in the pipeline 1 at an appropriate interval.

On the other hand, a pressure vessel 3 is installed on the ground, and a compressor 5 is connected to the pressure vessel 3 via an air hose 4. Further, a reel device 6 is accommodated in the pressure vessel 3.

[0015] As shown in FIG.
Has a hollow rotary shaft 7, the interior of the hollow rotary shaft 7 is divided into a chamber S ₁ and S ₂ by a partition wall 7a. Then, one of the chamber S ₁ is connected the hot water pipe 9a for supply via a swivel joint 8a, hot water pipe 9 for the other chamber S ₂ back through the swivel joint 8b
b is connected.

The hollow rotary shaft 7 has chambers S ₁ and S _2.
The nozzles 10a and 10b are connected to the nozzles 10a and 10b, respectively, and both ends of one continuous hot water hose 11 are attached to the nozzles 10a and 10b.
In FIG. 1, reference numeral 12 denotes a guide roller provided in the pressure vessel 3.

A water tank 13 is provided on the ground,
The hot water pipe 9a for supply is connected to a lower portion of the water tank 13, and a pump 14 is provided in the middle of the hot water pipe 9a.
And a boiler 15 are provided. On the other hand, the return hot water pipe 9b penetrates through the pressure vessel 3 and extends to the outside thereof, and its end is opened above the water tank 13 as shown. The water tank 13 contains a predetermined amount of water 1.
6 are stored.

The hot water hose 11 and a pipe lining material 18 connected to the hot water hose 11 via a rope 17 are wound around the hollow rotary shaft 7 of the reel device 6. Then, one end of the pipe lining material 18 is folded outward to open the nozzle 3a of the pressure vessel 3.
It is attached to the outer circumference.

The tube lining material 18 is formed by impregnating an uncured liquid thermosetting resin into a nonwoven fabric at least whose outer peripheral surface is covered with a highly airtight plastic film. In addition, a film of polyethylene, vinyl chloride, vinylon, polyurethane, or the like is used as the plastic film, and polyester, nylon, acryl, vinylon, or the like is selected as a material of the nonwoven fabric. As the thermosetting resin impregnated in the nonwoven fabric, an unsaturated polyester resin, an epoxy resin or the like is used.

Next, the pipe lining method according to the present invention will be described.

When the compressor 5 is driven to supply compressed air from the air hose 4 into the pressure vessel 3, the pipe lining material 18, one end of which is attached to the opening nozzle 3 a of the pressure vessel 3, is compressed by the pressure of the compressed air. , And are sequentially fed from the reel device 6 and inverted.
The feeding of the pipe lining material 18 from the reel device 6 is smoothly performed by the action of the guide roller 12.

Then, as shown in FIG. 1, the pipe lining material 18 is inverted and inserted into the pipe 1 through the manhole 2, and then the pipe lining material 18 is inserted into the pipe 1 in an inverted manner. At an advanced stage, the hot water hose 11 connected to the pipe lining material 18 via the rope 17 is pulled by the pipe lining material 18 and starts to be drawn out from the reel device 6.

As shown in FIG. 2, when the pipe lining member 18 is inserted upside down into the pipe line 1 over its entire length, the hot water hose 11 is connected to the pipe lining member 18 in conjunction with this operation. Drawn into. If the internal pressure of the pipe lining material 18 is kept constant in this state, the pipe lining material 18 is pressed against the inner peripheral wall of the pipe 1 as shown in the figure.

Next, when the pump 14 and the boiler 15 are driven while the pipe lining material 18 is pressed against the inner peripheral wall of the pipe line 1 as described above, the water 16 in the water tank 13 is sent to the boiler 15, The hot water is heated by the boiler 15 and is supplied to the reel device 6 through a supply hot water pipe 9a. Then, the hot water supplied to the reel unit 6, the swivel joint 8a, flows in the hot water hose 11 in the arrow direction in FIG. 2 through the chamber S ₁ and nozzle 10a in the rotary shaft 7, the vicinity of the tip pipe liner bag 1 flows in the opposite direction are turned back at flows from the nozzle 10b of the reel unit 6 in the chamber S ₂ in the rotary shaft 7, further flows through the hot water pipe 9b for return via a swivel joint 8b aquarium 13
Is returned to.

The hot water circulates continuously through the above route,
The pipe lining material 18 is heated in the course of flowing through the hot water hose 11. Then, the thermosetting resin impregnated in the pipe lining material 18 is heated and hardened, and when a part (lower part) of the thermosetting resin is heated and the hardening of the part starts, the self-hardening is performed. Since the other portions of the thermosetting resin are sequentially heated by the heat generation, the entire thermosetting resin is uniformly heated and uniformly cured.

Further, in the pipe lining material 18, the hot air generated by the hot water flowing through the hot water hose 11 rises as shown by the arrow in FIG. 5, so that the upper portion of the pipe lining material 18 is also heated by this hot air. The thermosetting resin impregnated in the portion is warmed and cured.

As described above, the entire thermosetting resin impregnated in the pipe lining material 18 is uniformly heated and hardened uniformly, so that the hardened pipe lining material 18 is distorted. There is no problem such as deformation.

When the hardening of the tube lining material 18 is completed as described above, unnecessary portions of the hardened tube lining material 18 are cut off as shown in FIG. Then, the pipe 1 is repaired by lining its inner peripheral wall with the pipe lining material 18.

Thus, according to the pipe lining method of the present invention, it is not necessary to directly fill the pipe lining material 18 reversely inserted into the pipe line 1 with a heat medium such as hot water, unlike the conventional method. Hot water hose 1 drawn into material 18
Since the thermosetting resin impregnated in the pipe lining material 18 can be heated and hardened by a small amount of hot water circulating in 1, the cost can be reduced by energy saving, downsizing of facilities, and the like. Workability is improved.

Further, according to the pipe lining method of the present invention, the hot water circulates in the hot water hose 11 and does not flow directly into the pipe lining material 18, so that there is a slack as shown in FIG. Also in the pipe 1 ', the warm water does not stay in the slack portion 1a', and the post-treatment of the pooled hot water becomes unnecessary, so that the pipe 1 'having such slack is similarly lined. Can be.

[0031]

As is apparent from the above description, according to the present invention, it is not necessary to directly fill the pipe lining material which is reversely inserted into the pipe line with the heat medium, unlike the prior art. Since the thermosetting resin impregnated in the pipe lining material can be heated and cured with a small amount of hot water circulating through the hot water hose drawn into the pipe, cost savings can be achieved through energy savings, downsizing of equipment, etc. As a result, the effect that the workability is improved can be obtained.

Further, according to the present invention, since the warm water does not circulate in the warm water hose and flows directly into the pipe lining material, the warm water does not stay in the slack portion in the slack pipe. This eliminates the need for hot water post-treatment, and provides an effect that the lining can be similarly applied to a slack duct.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the method of the present invention in the order of steps.

FIG. 2 is a sectional view showing the method of the present invention in the order of steps.

FIG. 3 is a sectional view showing the method of the present invention in the order of steps.

FIG. 4 is an enlarged detailed view taken along line AA of FIG. 1;

FIG. 5 is an enlarged sectional view taken along line BB of FIG. 2;

FIG. 6 is a cross-sectional view showing a lining operation for a slack conduit.

[Explanation of symbols]

1 line 3 a pressure vessel 5 Compressor 6 reel unit 7 hollow rotary shaft 8a, 8b swivel joint 9a, 9b hot water pipe 11 hot water hose 13 water tank 14 pump 15 Boiler 18 pipe liner S _1, S ₂ rooms

Claims (1)

(57) [Claims] 1. A pipe lining material impregnated with a thermosetting resin is reversely inserted into a pipe by fluid pressure.
The pipe lining material is applied to the pipe line by applying fluid pressure
While pressing against the inner peripheral surface, heat the pipe lining material
Tube to cure the thermosetting resin impregnated in the tube
A reel with a hollow rotating shaft in which two chambers are defined in the inning method
The device is housed in a pressure vessel installed on the ground, and the reel
Swivel joints are provided in each chamber formed on the hollow rotary shaft of the device.
Connect a hot water pipe through the
Connect the ends of the hot water hoses respectively, and
Material and the hot water hose connected to one end of the
Around the hollow rotary shaft, and connect the other end of the pipe lining material to the
Compressed inside the pressure vessel while attached to the opening of the pressure vessel
Supply air and use the pressure of the compressed air to make the pipe lining material
The pipe lining material
Of in conjunction with the inverted insert operation draws hot water hose to the pipe liner bag, while pressing the tube lining material on the inner peripheral surface of the pipe by the action of air pressure in the pipe liner bag, warm
A pipe lining method characterized by heating a pipe lining material by circulating hot water through a water hose .