JPH0717014B2 - Branch 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 lining method for forming a synthetic resin pipe over the entire branch pipe of an existing pipe such as a water pipe or a petroleum pipe.

[0002]

2. Description of the Related Art By lining synthetic resin pipes in existing pipes such as water pipes and petroleum pipes, the strength of existing pipes is strengthened, corrosion is prevented, water leakage is prevented, and flow rate is improved. When the conventional construction method of lining a synthetic resin pipe on the branch pipe of the existing pipe is roughly classified, the following three types of construction methods are adopted.

(1) For example, as disclosed in Japanese Patent Laid-Open No. 62-284727, a flexible lining material impregnated with an adhesive is inverted and inserted from the open end of the branch pipe toward the main pipe by a pressure fluid. Then, while maintaining the fluid pressure, the adhesive is cured to form a synthetic resin pipe, and a water blocking agent is injected into the connection with the main pipe to stop the water.

(2) As disclosed in Japanese Patent Application Laid-Open No. 2-43024, a thermoplastic resin pipe is processed so as to have a small cross-sectional area, and the resin pipe is heated and softened so that the branch pipe is opened. After inserting toward the main pipe, supply a heating fluid into the resin pipe to expand the pipe, and stop the connection with the main pipe with a waterproof agent.

(3) As disclosed in Japanese Unexamined Patent Publication No. 64-58525, a thermosetting resin is impregnated into a cylindrical portion of a flexible lining material having a stopper corresponding to a main pipe connecting portion at an end thereof,
When this lining material is bundled from the branch pipe to the rope inserted into the main pipe and drawn into the branch pipe, and the stopper hits the connecting portion between the branch pipe and the main pipe, that is, the force applied to the rope suddenly increases. When it becomes large, the drawing is stopped, and the tube is reversed and inserted inside the lining material to press the lining material against the inner surface of the branch pipe, while supplying the heating fluid to cure the lining material.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention JP-A-62-284727
In the method disclosed in Japanese Patent Laid-Open Publication No. 2-43024 and Japanese Patent Laid-Open No. 2-43024, the connection between the main pipe and the branch pipe, which is at the risk of the maximum leakage, is stopped with a water blocking agent. With the passage of time, there is a drawback that the water blocking effect cannot be expected for a long period of time due to contraction of the water blocking agent, deterioration due to hydrolysis, or peeling due to vibration of a passing vehicle, transportation load or earthquake. It was

As disclosed in Japanese Unexamined Patent Publication No. 64-58525, in the method of pulling the flexible lining material into the branch pipe by the rope, wrinkles are apt to occur when the lining material is pulled in, and the branch pipe and the lining There is a risk that voids will be formed between the materials, and that water will enter the voids over time and the lining material will peel off. In addition, although a stopper is in contact with the connection between the branch pipe and the main pipe, good adhesion cannot be expected between the hard stopper and the main pipe connection, which makes it difficult to stop water at the main pipe connection. The disadvantage is that

Further, in any of the above construction methods, it is necessary to provide a construction site on the main pipe side and on each open end of each branch pipe, and public disaster prevention measures must be implemented for each construction site. It also has the disadvantage of being expensive.

The present invention has been made in order to solve the above disadvantages, and the synthetic resin pipe can be surely brought into close contact with the inner surface of the branch pipe, and the connecting portion between the branch pipe and the main pipe can be surely stopped. The purpose of the present invention is to provide a lining method for a branch pipe that can be used.

[0010]

The branch pipe lining method according to the present invention covers a flexible resin tube impregnated with a thermosetting resin and an outer surface of the resin tube having heat resistance and tensile strength. The lining material, which comprises a film tube and has a brim at the front end, is changed in shape so that the cross-sectional area is small, and a pressurized fluid supply hose is connected to the rear end to be stored in a pressure vessel, An introducing tube is connected to the rear end of the guide pipe having a tip end attached to the surface of the elevating means, the collar portion of the lining material is pulled out from the outlet of the pressure vessel, and the elevating means is passed through the introducing tube and the guide pipe. Mounted on the surface of the inlet tube, connect the rear end of the introduction tube and the outlet of the pressure reversal container, move the lifting means to the main pipe connection part of the branch pipe, and drive the lifting means to branch the brim of the lining material. Pressing against the main connection of the pipe, supplying pressurized fluid from the pressure vessel The lining material is reversed into the branch pipe Te, pressurized fluid supply E - supplying heated pressurized fluid through scan by heating the lining material, characterized by curing.

Further , the lining material is lined on the branch pipe.
Before doing so, insert the inner pipe on the inner peripheral surface in the vicinity of the main pipe connection part in advance.
Connection between the main pipe and the branch pipe, provided with multiple irregularities along the circumference
Centering on the axial center of the branch pipe on the connecting surface with the collar of the surrounding lining material
It is preferable to have multiple concentric concavo-convex shapes.
Yes.

[0012]

In the present invention, the lining material, which is made of a flexible resin tube impregnated with a thermosetting resin and a film tube and has a brim at the tip, is changed in shape so as to have a small cross-sectional area, and A pressurizing fluid supply hose is connected to the end portion and housed in a pressure vessel.

The flange portion of this lining material is pulled out from the outlet of the pressure vessel, and a guide pipe having a tip portion attached to the surface of the elevating means having a packer or an air cylinder and an introduction tube connected to the rear end portion of the guide pipe. -Mount it on the surface of the lifting means through the knob.

After connecting the rear end of the introduction tube and the outlet of the pressure reversal container, the elevating means is moved to the main pipe connecting portion of the branch pipe, and the elevating means is driven to branch the brim of the lining material. Press the pipe to the main pipe connection part to bring the flexible collar into close contact with the main pipe connection part of the branch pipe.

Thereafter, a pressurized fluid is supplied from the pressure vessel through the introduction tube and the guide pipe, and the lining material is inverted and inserted into the branch pipe. After the inversion surface of the lining material reaches the open end of the branch pipe, the pressurized fluid supply hose connected to the lining material.
A heating and pressurizing fluid is supplied and circulated through the resin to heat and cure the thermosetting resin impregnated in the lining material, and the resin tube and flange of the lining material are tightly fixed to the branch pipe and the main pipe connecting portion.

As described above, before inserting the lining material into the branch pipe by inversion, a circular shape concentric with the axial center of the branch pipe is previously formed on the inner surface of the branch pipe and the main pipe at the connecting portion between the branch pipe and the main pipe. If the thermosetting resin impregnated in the lining material is heated and cured, the thermosetting resin penetrates into the recesses and the connection portion between the resin tube and the collar is provided. The adhesion strength can be further increased.

[0017]

1 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a main pipe such as a water pipe or a petroleum pipe, 2, 2
Reference symbol a is a branch pipe connected to the main pipe 1, and reference numeral 3 is a lining material.
As shown in the perspective view of FIG. 2, the lining material 3 is made of resin.
And a collar 5 joined to the tip of the resin tube 4,
A film tube 6 that covers the outer surfaces of the collar 5 and the resin tube 4.
It is formed from and. The resin tube 4 and the collar 5 are made of a soft synthetic resin woven fabric or non-woven fabric impregnated with a thermosetting resin. The cylindrical portion of this lining material 3 is
It has an outer diameter of 90 to 100% and is formed to be somewhat longer than the entire length of the branch pipe 2. The lining material 3 is flattened or bent to reduce the cross-sectional area. A heating fluid supply hose 7 having a plurality of fluid discharge ports 8 is connected to the rear end of the lining material 3, and the heating fluid supply hose 7 is placed inside to form a drum with a swivel mechanism. It has been wound up.

Reference numeral 9 denotes an elevating means connected to a self-propelled vehicle 10 traveling in the main pipe 1, and the elevating means 9 is composed of a device having a packer, an air cylinder or the like. Inside the elevating means 9, a guide pipe 11 composed of an elbow whose tip is connected to the surface of the elevating means 9 is fixed.
An introduction tube 13 is attached to the rear end of the band 1 by a band 12.

When the lining material 3 constructed as described above is lined in the branch pipe 2, the heating fluid supply hose 7 is used.
The drum wound with the lining material 3 and the lining material 3 is housed in the pressure vessel 14, and the rear end of the heating fluid supply hose 7 is connected to the fluid supply port 16 of the pressure vessel 14 to be carried into the site and delivered to the main site. Install in the vicinity. The fluid supply ports 16 and 17 and the fluid discharge port 18 of the pressure vessel 14 are connected to a heating fluid generator 19 composed of a hot water boiler or a steam boiler.

Next, the collar 5 of the lining material 3 is pulled out from the outlet 15 of the pressure vessel 14, is temporarily attached to the surface of the elevating means 9 through the introduction tube 13 and the guide pipe 11, and after the introduction tube 13. The end is connected to the outlet 15 of the pressure vessel 14.

In this state, the self-propelled vehicle 10 is run in the main pipe 1, and when the elevating means 9 reaches the connecting portion 21 of the branch pipe 2, as shown in FIG. 9 is rotated by the rotating device of the self-propelled vehicle 10 so that the collar 5 of the lining material 3 is aligned with the position of the connecting portion 21. After that, the elevating means 9 is raised to fix the collar 5 to the end of the connecting portion 21.

Next, a pressurized fluid is supplied from the heating fluid generator 19 through the pressure vessel 14 to the introduction tube 13 and the guide pipe 11. By the pressure difference between the pressure of the pressurized fluid and the atmospheric pressure, the resin tube 4 of the lining material 3 and the film tube are
The tube 6 is inverted, and as shown in FIG. 1, the inversion surface 22 advances into the branch pipe 2 to bring the resin tube 4 into close contact with the inner surface of the branch pipe 2. When the inversion surface 22 of the lining material 3 advances to about half the total length of the branch pipe 2, the tip of the heating fluid supply hose 7 attached to the rear end of the lining material 3 is drawn into the branch pipe 2. First, when the inverted surface 22 of the lining material 3 reaches the open end of the branch pipe 2, the tip of the heating fluid supply hose 7 also moves to the vicinity of the open end of the branch pipe 2.

When the inversion surface 22 of the lining material 3 reaches the open end of the branch pipe 2, the valve 17a of the fluid supply port 17 of the pressure vessel 14 is closed and the rear end of the heating fluid supply hose 7 is connected. A valve 16a of a certain fluid supply port 16 is opened, and a heating and pressurizing fluid is heated from a heating fluid generator 19 to a temperature at which the collar 5 of the lining material 3 and the thermosetting resin impregnated in the resin tube 4 are cured by heating. The fluid is supplied to the fluid supply hose 7 and is discharged from the fluid discharge port 8 at the tip end, and the lining material 3 and the guide pipe 1 are provided.
1. Circulate while passing through the introduction tube 13.

Then, the heating temperature is maintained until the thermosetting resin impregnated in the collar 5 and the resin tube 4 is cured. When the thermosetting resin has hardened after a lapse of a predetermined time, the supply of the heating fluid is stopped. Then, after lowering the lifting means 9,
A resin that hardens the connecting portion 21 between the entire inner surface of the branch pipe 2 and the main pipe 1 by cutting the reversal surface 22 of the lining material 3 at the open end of the branch pipe 2 and pulling out the heating fluid supply hose 7. It can be completely covered with the tube 4 and the collar 5.

After that, the lifting means 9 and the self-propelled vehicle 10 are connected to the main pipe 1
Then, the next branch pipe 2a is lined.

In the above embodiment, the introduction tube 13 and the outlet 15 of the pressure vessel 14 are connected to each other. However, as shown in FIG. Connected to the end of the pipe 1, the end of the main pipe 1 and the pressure vessel 14
The outlet 15 may be connected to another introduction pipe 23.

In each of the above-mentioned embodiments, the case where the resin tube 4 and the collar 5 are lined without processing the connecting portion 21 of the branch pipe 2 and the main pipe 1 has been explained. However, as shown in FIG. main pipe 1 side of the end parts 21 and of the end of the branch pipe 2
A plurality of circular concavities and convexities 2 concentric with the axis of the branch pipe 2 on the surface.
By previously providing 4, 25 and grooves, the collar 5 and the resin tube 4 can be more securely fixed to the connecting portion 21.

As described above, when a plurality of irregularities 24 and 25 are formed in the end portion of the connecting portion 21 on the main pipe 1 side and the end portion of the branch pipe 2, the lining material reversely inserted into the branch pipe 2 is formed. When the thermosetting resin impregnated in the collar 5 and the resin tube 4 of No. 3 is heat-cured, the thermosetting resin penetrates into the concave portion and is cured. Therefore, physical bonding is added to the chemical bonding by the thermosetting resin, and the bonding strength between the collar 5 and the resin tube 4 to the connecting portion 21 can be further increased.

[0029]

As described above, according to the present invention, since the branch pipe and the main pipe connecting portion of the branch pipe are lined at once with the lining material with the collar, the construction time can be shortened and the uniform quality can be obtained. Can be formed on the branch pipe and the main pipe connecting portion of the branch pipe.

When lining the lining material,
Attach the flange of the lining material consisting of a flexible flange impregnated with a thermosetting resin, the resin tube and the film tube to the surface of the lifting means and move it from the main pipe side to the main pipe connection part of the branch pipe. By pressing the brim of the lining material against the connecting portion by the elevating means, the flexible brim can be surely brought into close contact with the main connecting portion of the branch pipe.

Further, after the brim of the lining material is brought into close contact with the main pipe connecting portion of the branch pipe, the lining material is inverted and inserted into the branch pipe by the pressurized fluid, so that the resin tube is securely attached to the entire inner surface of the branch pipe. Can be adhered to.

A heating fluid is supplied to the inside of the closely attached lining material by a heating fluid supply hose to heat and cure the thermosetting resin impregnated in the resin tube and the collar, thereby connecting the branch pipe and the main pipe. The part can be completely covered with the synthetic resin, and the leakage of the fluid from the branch pipe can be prevented.

Further, since the construction of a plurality of branch pipes can be performed almost at one place on the main pipe side, the construction efficiency can be improved and the construction cost can be reduced.

Before inserting the lining material into the branch pipe by inversion, a plurality of circular shapes concentric with the axial center of the branch pipe are previously formed on the inner surface of the branch pipe and the main pipe at the connecting portion between the branch pipe and the main pipe. If the thermosetting resin impregnated in the lining material is heated and hardened, the thermosetting resin will penetrate into the recesses and enhance the adhesion strength to the connection part between the resin tube and the flange. be able to.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a lining material.

FIG. 3 is a cross-sectional view showing a lining process of the lining material.

FIG. 4 is a sectional view showing another embodiment.

FIG. 5 is a sectional view showing a third embodiment.

[Explanation of symbols]

 1 Main pipe 2 Branch pipe 3 Lining material 4 Resin tube 5 Tsuba 6 Film tube 7 Heating fluid supply hose 9 Elevating means 10 Self-propelled vehicle 11 Guide pipe 13 Introducing tube 14 Pressure vessel 19 Heating fluid generation Device 22 Inversion surface 24 Groove 25 Groove

Claims (2)

[Claims] 1. A lining having a flexible resin tube impregnated with a thermosetting resin and a film tube having heat resistance and tensile strength and covering the outer surface of the resin tube, and having a brim at the tip. Change the shape of the material so that the cross-sectional area is small, connect the pressurized fluid supply hose to the rear end and store it in the pressure vessel,
An introducing tube is connected to the rear end of the guide pipe having a tip end attached to the surface of the elevating means, the collar portion of the lining material is pulled out from the outlet of the pressure vessel, and the elevating means is passed through the introducing tube and the guide pipe. Mounted on the surface of the inlet tube, connect the rear end of the introduction tube and the outlet of the pressure reversal container, move the lifting means to the main pipe connection part of the branch pipe, and drive the lifting means to branch the brim of the lining material. Press the pipe against the main pipe connection, supply the pressurized fluid from the pressure vessel to insert the lining material inside the branch pipe, and then heat the pressurized lining fluid by supplying the heating fluid through the pressurized fluid supply hose to heat the lining material. ， The branch pipe lining method characterized by hardening. 2. Before lining a liner with a liner
The inner circumference of the branch pipe in the vicinity of the main connection part beforehand.
A plurality of irregularities along the line are provided to connect the main pipe with the branch pipe.
Centering on the axial center of the branch pipe on the connecting surface with the brim of the surrounding lining material
The portion according to claim 1, wherein a plurality of concentric concavities and convexities are provided.
Manifold lining method.