JPH02194932A - Method for lining pipeline - Google Patents

Abstract

PURPOSE:To make it possible to uniformly and surely cure reactive curing type resin liquid over the whole length of a pipeline by a method wherein fluid in the lining material inserted in the pipeline is discharged through a rigid tube. CONSTITUTION:A flexible rigid tube 12, the tip of which locates at the terminal 4 of a lining material 2 and the terminal of which is open in the air, pierces through the pipe wall of the lining material 2 outside a branch pipe 9. Under the above-mentioned state, heated pressure fluid such as pressurizing steam is fed from a pressure vessel 1. As a result, pressure fluid, which fills the lining material 2, is discharged outside through the rigid tube 12 by means of the pressure of said heated pressure fluid so as to replace the pressure fluid filling the lining material 2 with the heated pressure fluid and to fill the lining material 2 with the heated pressure fluid in order to thermally cure reactive curing type resin liquid, which interposes between the lining material 2 and the branch pipe 9. By feeding the heated pressure fluid in the lining material as mentioned above, fluid such as the pressure fluid and water in the lining material is discharged through the rigid tube outside the lining material by means of the pressure of the heated pressure fluid.

Description

[Detailed Description of the Invention] Field of Industrial Application The present invention relates to a method for lining the inner surface of a pipeline by pasting a lining material on the inner surface of the pipeline, and is particularly applicable to a pipeline buried underground. On the other hand, it relates to a method of lining the inner surface for the purpose of repair or reinforcement.

Conventional technology The conventional method for lining pipes is to apply a reaction-curing resin liquid to the inner surface of a flexible cylindrical lining material, turn it over using fluid pressure, insert it into the pipe, and then turn it inside out. A method is known in which the lining material is pressure-bonded to the inner surface of the pipe via the reaction-curing resin liquid, and the reaction-curing resin liquid is cured to bond the lining material to the pipe.

In this method, it is preferable to insert the lining material into the pipe and then heat it to accelerate the curing of the reaction-curing resin liquid.
A method disclosed in Japanese Patent No. 9-37213 is known.

As shown in FIG. 3, this method involves inserting the lining material 2 housed in the pressure vessel 1 inside out from one end to the other end into the pipe line 3 while turning it over using fluid pressure, and protruding from the other end of the pipe line 3. A piercing device 7 having a valve 6 attached to a tube 5 is inserted into the terminal end 4 of the lining material 2 , and heated pressure fluid is supplied from the pressure vessel 1 and the pressurized fluid inside the lining material 2 is transferred to the piercing device 7 . The inside of the lining material 2 is replaced with a heated pressure fluid, and the heat of the heated pressure fluid accelerates the curing of the reaction-curing resin liquid.

However, this method has various problems because the pressure fluid inside the lining material 2 is discharged at the terminal end 4 of the lining material 2. As one example, when lining a branch pipe 9 branched from the main pipe 8 as shown in Fig. 4, the lining material 2 is inserted from the end of the branch pipe 9, and the terminal end 4 is 8
Therefore, the insertion tool 7 cannot be inserted into the P end 4. Therefore, the pressure fluid inside the lining material 2 cannot be replaced with heated pressure fluid, and the reaction hardening resin liquid cannot be replaced with the heated pressure fluid. cannot be accelerated by heating.

In addition, as shown in Figure 5, pipe line 3 may have curved parts due to ground vibrations, or may have been bent to avoid other pipes. . When the above-mentioned method is adopted when lining the pipe line 3 having such a bent portion 10, moisture in the heated pressure fluid condenses within the lining material 2, and this condenses into water 11.
The water 11 accumulates at the lowest part of the bent portion 10 and cannot be discharged. Particularly when pressurized steam is used as the heating pressure fluid, this pressurized steam condenses and a large amount of water 11 accumulates. , the reaction-curing resin liquid in that area may not be sufficiently heated, and its curing may be delayed.

The present invention has been made in view of the above circumstances, and it is possible to reliably line a branch pipe branching from a main pipe or a pipe having a curved portion, regardless of the state of laying the pipe. The purpose is to provide a method that allows for

As a means to solve the problem, the present invention inserts a flexible cylindrical lining material into a pipe line, feeds pressure fluid into the lining material, and cures the lining material through a reaction-curing resin liquid. In the method of pressurizing the inner surface of a pipe, replacing the pressure fluid in the lining material with a heated pressure fluid, and heating and curing the reaction-curing resin liquid, a flexible hard tube is inserted into the lining material. , the distal end of the hard tube is positioned at a desired location within the lining material, the rear end is communicated with the outside air, and the fluid within the lining material is discharged through the hard tube.

In addition, as a method for applying the present invention to the lining of a branch pipe, a lining material whose tip is closed is inserted into a branch pipe that has branched from the main pipe, the tip of the lining material is made to protrude into the main pipe, and the lining material is lined with the lining material. A flexible hard tube that is made to pressurize against the inner surface of a branch pipe by feeding pressure fluid into the material through a reaction-curing resin liquid, and penetrate the pipe wall of the portion outside the branch pipe at the rear of the lining material. is inserted and its tip is positioned at the tip of the lining material, heated pressure fluid is introduced from the rear part of the lining material, and the pressure fluid inside the lining material is discharged from the rigid tube to become heated pressure fluid. This can be carried out by replacing the liquid and heating and curing the reaction-curing resin liquid with the heat of the heated pressure fluid.

In addition, a method that can be applied to pipes with curved parts such as overhanging parts is to insert a flexible cylindrical lining material into the pipe pipe with the curved part, and send pressure fluid into the lining material to react. A flexible hard tube is brought into pressure contact with the inner surface of the pipe through a hardening resin liquid, penetrates through the pipe wall of the outside of the pipe of the lining material, and inserts its tip into the bent part. A heated pressure fluid is introduced from one end of the lining material, the pressure fluid is discharged from the @ end of the inner lining material, and replaced with the heated pressure fluid, and the heat of the heated pressure fluid This can be carried out by heating and curing the reaction-curing resin liquid and discharging the liquid that has accumulated in the bent portion through the hard tube.

The hard tube used in the present invention has enough rigidity to maintain a circular cross section without being flattened by the fluid pressure in the lining material, and is flexible enough to withstand bends in the introduction part of the lining material or in the conduit. It is necessary that the tube has enough flexibility to follow the bends of the lining material and conduit and change its direction. As such a tube, a relatively thick tube made of plastic such as high-density polyethylene, polypropylene, or nylon 12, or a flexible tube made of metal can be used. The outer diameter of this tube is suitably about 5 to 20% of the inner diameter of the pipe line to which it is applied.

Further, as a method for locating the tip of the hard tube 12 at a desired location within the conduit 3, a temperature sensor is attached to the tip of the hard tube 12 to measure the temperature around the tip of the hard tube 12. , it is possible to accurately capture the low-temperature portion within the tube #I3 and position the tip of the hard tube 12 there.

According to the present invention, since the hard tube is flexible, it bends in response to the introduction of the lining material into the conduit and the bending of the conduit, and bends its tip to the desired location within the lining material. to be located. Furthermore, since the heated pressure fluid is fed into the lining material in this state, the pressure fluid and fluids such as water 11 within the lining material are discharged to the outside of the lining material through the hard tube due to the pressure of the heated pressure fluid.

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

FIG. 1 shows a state in which the present invention is applied to the lining of a branch pipe 9. The lining material 2 is turned over and inserted into the branch pipe 9 by the fluid pressure within the pressure vessel 1, and is pressed against the inner surface of the branch pipe 9 by the fluid pressure. The reversed terminal end 4 of the lining material 2 protrudes into the main pipe 8 from the branch part of the branch pipe 9.

12 is a flexible hard tube, which is inserted through the tube wall of the lining material 2 outside the branch pipe 9, and its tip is located at the terminal end 4 of the lining material 2; is open.

In this state, heated pressure fluid such as pressurized steam is introduced from the pressure vessel 1. The pressure fluid filled in the lining material 2 due to the pressure of the heated pressure fluid is removed from the hard tube 1.
2, the pressure fluid inside the lining material 2 is replaced with heated pressure fluid, the heated pressure fluid fills the lining material 2, and the reaction hardening interposed between the lining material 2 and the branch pipe 9 occurs. The mold resin liquid is heated and hardened.

FIG. 2 shows a state in which the present invention is applied to a conduit 3 having a bent portion 10. As shown in FIG. In this example as well, the lining material 2 is turned over by the fluid pressure in the pressure vessel 1 and inserted from one end of the pipe line 3 to the other end, and is pressed against the inner surface of the pipe line 3 by the fluid pressure. The reversed terminal end 4 of the lining material 2 projects from the other end of the conduit 3, and a piercing tool 7 is attached to the projecting portion.

The hard tube 12 is inserted through the tube wall of the lining material 2 outside the conduit 3, and its tip is located at the lowest part of the target portion 10, and its rear end is open to the atmosphere.

In this state, heated pressure fluid such as pressurized steam is introduced from the pressure vessel 1. Then, the pressure fluid filled in the lining material 2 due to the pressure of the heated pressure fluid is discharged from the puncture tool 7 and the hard tube 12, the pressure fluid in the lining material 2 is replaced with the heated pressure fluid, and the heated pressure fluid is the lining material 2
The reaction-curing resin liquid that fills the inside and is interposed between the lining material 2 and the pipe line 3 is heated and hardened.

In addition, the moisture contained in this heated pressure fluid condenses into water 11 and stays in the bent portion 10 of the lining material 2.
This water 11 is discharged to the outside through the rigid tube 12 by the pressure of the heated pressure fluid. Therefore, the water 11 does not cause insufficient heating.

Effects of the Invention According to the present invention, when the reaction-curing resin liquid is heated with heated pressure fluid to promote curing, the fluid in the lining material inserted into the pipe is discharged through the hard tube 12, so that the lining material The reaction-curing resin liquid can be cured evenly and reliably along the entire length of the pipe line without the fluid remaining in the tube becoming an obstacle to heat curing.

In the invention of claim 2, when lining a branch pipe branched from a main pipe, the pressure fluid at the end of the lining material is discharged through the hard tube, so the lining can be lined without attaching a piercing tool to the end. By replacing the pressure fluid within the material with a heated pressure fluid, it is possible to efficiently heat the reaction-curing resin liquid and promote curing.

In addition, in the invention of claim 3, even if water condensed from the heated pressure fluid stays in the bent part, the water is discharged through the hard tube, so a large amount of water does not stay there for a long time. The reaction-curing resin liquid will not be sufficiently heated and will not be insufficiently cured.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are central vertical cross-sectional views showing the state in which the present invention is implemented for a conduit having a branch pipe and a bent portion, respectively. FIG. 3 is a central vertical cross-sectional view showing a state in which a pipe is lined by a conventional method, and FIGS. 4 and 5 respectively show a pipe having a branch pipe and a bent part by the conventional method. FIG. 2 is a central vertical cross-sectional view showing a problem when lining the interior of the vehicle.

Claims (1)

[Claims] 1. A flexible cylindrical lining material (2) is inserted into a pipe line (3), and a pressure fluid is sent into the lining material (2) to cause the lining material (2) to react. In a method in which the lining material (2) is brought into pressure contact with the inner surface of the pipe line (3) via a curable resin liquid, the pressure fluid in the lining material (2) is replaced with a heated pressure fluid, and the reaction curable resin liquid is heated and cured. A flexible hard tube (12) is inserted into the material (2), and the hard tube (12) is inserted into the material (2).
Position the tip of the lining material (12) at a required location within the lining material (2), and allow the rear end to communicate with the outside air.
2) A method for lining a pipe line, characterized in that the fluid inside is discharged through the hard tube (12) 2 A branch pipe (9) branched from the main pipe (8) is closed off from its terminal end to a branch pipe (9). The lining material (2) is inserted, the tip of the lining material (2) is made to protrude into the main pipe (8), and pressure fluid is fed into the lining material (2) through the reaction-curing resin liquid. The inner surface of the branch pipe (9) is pressed against the inner surface of the lining material (2).
A flexible hard tube (12) is inserted through the wall of the outer portion of the branch pipe (9) at the rear of the tube, and its tip is positioned at the tip of the lining material (2), A heated pressure fluid is introduced from the rear of the lining material (2), the pressure fluid inside the lining material (2) is discharged from the rigid tube (12) and replaced with the heated pressure fluid, and the heat of the heated pressure fluid Branch pipe lining method 3, characterized by heating and curing the reaction-curing resin liquid. A flexible cylindrical lining material (2) is inserted into a pipe line (3) having a bent part (10). Pressure fluid is fed into the lining material (2) to pass through the reaction-curing resin liquid to the pipe line (3).
) of the pipe line (3) of the lining material (2).
) A flexible hard tube (12) is inserted through the tube wall of the outer portion, and its tip is positioned at the lowest part of the bent portion (10), and one end of the lining material (2) is inserted. A heated pressure fluid is introduced from the lining material (2), and the pressure fluid is applied to the lining material (2).
The reaction hardening resin liquid is discharged from the other end and replaced with a heated pressure fluid, and the reaction hardening resin liquid is heated and hardened by the heat of the heated pressure fluid, and is retained in the bent part (10) via the hard tube (12). characterized by discharging liquid that has been
Method for lining pipes with bends