JPH0592485A - Pipe lining material and inversion method thereof - Google Patents

Abstract

(57) [Summary] [Object] To provide a pipe lining material that can be easily inverted with a small and compact device, and a method for inverting the pipe lining material. [Structure] A part of the pipe lining material 1 which is formed by impregnating a curable resin and partially attaching the sealing bags 2 and 3 which are expanded by receiving the supply of compressed air to the outer peripheral portion thereof before inversion. After inserting the inside of the aged pipe 10 by water pressure, compressed air is supplied to the sealed bags 2 and 3 to expand the sealed bags 2 and 3 in the aged pipe 10 (pipe lining material 1). The sealed spaces S1 and S2 are formed inside the pipe lining material 1 inserted into the aged pipe 10, and compressed air is supplied into the sealed space S1 to sequentially invert the pipe lining material 1 in the aged pipe 10 ( 1 invention). According to this method, the closed space S is provided in the pipe lining material 1 inserted in the deteriorated pipe 10.
Since 1 and S2 are formed, the reversing device installed on the ground can be made small and compact, and the reversing work can be performed efficiently and efficiently.

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 used in a pipeline repairing method for lining and repairing an aged pipe, and a method for inverting the pipe lining material.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the ground 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 Laid-Open No. 60-242038) and put to practical use. That is, this pipe repairing method involves inserting a pipe lining material, which is made by impregnating a flexible resin absorbent material with a curable resin, into the pipe line while reversing it by fluid pressure, and By pressing against the surface, heating the pipe lining material while maintaining this state to cure the curable resin impregnated in it, and lining the inner peripheral surface of the aged pipe with the cured pipe lining material is there.

By the way, in such a pipeline repairing method, water pressure or air pressure is adopted as the fluid pressure used for reversing the pipe lining material. 4 to 6 show a conventional inversion method.

That is, the method shown in FIG. 4 is a method of reversing by utilizing water pressure. In this method, water is injected into the reversed pipe lining material 101, and the pipe lining material 101 is sequentially reversed by water pressure. Aged pipe 110
Inserted inside.

Further, the method shown in FIG. 5 is a method of reversing by utilizing air pressure. In this method, the pipe lining material 10 is used.
The whole 1 is housed in a closed container 120, and the pipe lining material 101 is inserted into the aged pipe 110 while being sequentially reversed by the pressure of the compressed air supplied into the closed container 120.

Further, the method shown in FIG. 6 is a U-shaped tube reversal method using both water pressure and air pressure. In this method, the pipe lining material 101 passes through the water in the U-shaped container 130 and its The end is folded back and attached to the one end opening of the container 130. Thus, a sealed space S that is airtightly partitioned by water in the container 130 is formed in the pipe lining material 101, and compressed air is supplied into the sealed space S, whereby the pipe lining material 101 is compressed. It is inserted into the aged pipe 110 while being sequentially inverted under the pressure of air.
If the internal pressure (reversal pressure) of the closed space S at this time is P, the water in the container 130 has a head difference of Δh = P / γ (γ is the specific weight of water).

[0007]

However, in the method of utilizing the water pressure shown in FIG. 4, in order to obtain the water pressure of 1 kg / cm ^2, a water column having a height of about 10 m is provided above the aging pipe 110. In particular, when a large reversal force is required, there is a problem that the height of the device for obtaining the required water pressure becomes high and workability and work efficiency are poor. Also, in a steep pipeline, the water level difference (head difference) between the lining material reversal part and the pipeline inlet becomes large, and the pipeline lining is pressed against the pipe wall at the pipeline inlet. It is difficult to invert and insert the material.

Further, in the method of utilizing air pressure shown in FIG. 5, the entire pipe lining material 101 is sealed container 120.
Since the pipe lining material 101 has a large diameter or a long size because it is housed inside, there is a problem that the sealed container 120 becomes large.

Further, in the method of using both water pressure and air pressure shown in FIG. 6, when a high reversal pressure P is required, the head difference Δh of water in the container 130 becomes large, so that the container 130 is There was a problem of increasing the size.

The present invention has been made in view of the above problems, and an object thereof is to provide a pipe lining material which can be easily inverted by a small and compact device, and a method for inverting the pipe lining material. Especially.

[0011]

SUMMARY OF THE INVENTION To achieve the above object, the present invention partially provides a hermetically sealed bag body which is expanded by receiving a supply of a compressed gas, on an outer peripheral portion of a pipe lining material impregnated with a curable resin. It is characterized by being attached to.

Further, the first method of the present invention is constituted by impregnating a curable resin and partially attaching a sealing bag body which is inflated by receiving a supply of a compressed gas to the outer peripheral portion thereof before inversion. A part of the pipe lining material is inverted and inserted into the pipe line by fluid pressure, and then compressed gas is supplied to the sealed bag body to expand the sealed bag body in the pipe line, thereby inserting the pipe lining material into the pipe line. A closed space is formed inside the formed pipe lining material, and compressed gas is supplied to the closed space to sequentially invert the pipe lining material.

Further, in the second method of the present invention, a part of the pipe lining material is inverted and inserted into the pipe line by fluid pressure, and then the liquid is injected into the closed tube to make the closed tube into the pipe lining material. It is characterized in that a sealed space is formed inside the pipe lining material by partially inverting and inserting the pipe lining material, and a compressed gas is supplied to the sealed space to sequentially invert the pipe lining material.

[0014]

According to the present invention, a sealed space is formed by a sealed bag body or a sealed tube in a pipe lining material partially inserted in a pipe, and the pressure of the compressed gas supplied into the sealed space. Since the pipe lining material is sequentially reversed by, the reversing device installed on the ground becomes smaller and compact, and the reversing work can be performed efficiently and efficiently.

Further, as described above, since the compressed gas pressure is used for reversing the pipe lining material, the problem of head difference which has occurred in the pipe line having a steep slope does not occur, and the conventional technique is not used. The drawbacks of the water pressure inversion method (the method shown in FIG. 4) can be eliminated.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The inversion method according to the first invention will be described below with reference to the sectional view of FIG.

In the method of the present invention, a pipe lining material 1 made of a flexible resin absorbent material impregnated with a curable resin is used, and the pipe lining material 1 has two hermetically sealed bags at its outer peripheral portion before inversion. The bodies 2 and 3 are partially attached. These hermetically sealed bags 2 and 3 are inflatable and contractible, and are formed into a bag shape with vinyl chloride, urethane, EVA (vinyl acetate), etc., and air hoses 4 and 5 are connected to each of them. ing. The air hoses 4 and 5 are connected to an air compressor (not shown) installed on the ground.

When repairing the aged pipe 10, first, the tip of the pipe lining material 1 is bent as shown in the figure and attached to the peripheral edge of the tubular portion 6a of the frame 6. Next, when water is injected from the hose 7 into the inside of the folded back portion of the pipe lining material 1, the pipe lining material 1 is sequentially inverted by water pressure as in the conventional method, and a part of the pipe lining material 1 is aged as shown in the drawing. It is partially inserted in the vicinity of the inlet part.
At this time, inside the pipe lining material 1 that has been inverted and inserted into the aged pipe 10, the sealed bags 2 and 3 attached to the outer peripheral portion of the pipe lining material 1 before the inversion exist.

Thereafter, when compressed air is supplied from an air compressor (not shown) to the sealed bags 2 and 3 through the air hoses 4 and 5, the sealed bags 2 and 3 are inserted into the aged pipe 10 to form a pipe lining material. Pipe lining material 1 that expands inside 1
The interior of is sealed airtightly into the closed spaces S1 and S2. At this time, the air hose 8 connected to an air compressor (not shown) faces the closed space S1.

When compressed air discharged from an air compressor (not shown) is supplied into the closed space S1 in the pipe lining material 1 via the air hose 8, the pipe lining material 1
Are inverted one after another under the pressure of compressed air, and the aged pipe 10
It will be inserted in sequence. At this time, between the water remaining in the closed spaces S1 and S2 in the pipe lining material 1,
Head difference Δh corresponding to the pressure difference ΔP between the closed spaces S1 and S2
= ΔP / γ (γ is the specific weight of water) is generated, and the closed space S1,
Leakage of the compressed air in S2 into the atmosphere is prevented by the water remaining in the closed space S2.

As described above, in this embodiment, the aged pipe 10 is used.
Since the closed spaces S1 and S2 are formed in the pipe lining material 1 partially inserted therein, compressed air is supplied into the closed space S1 and the pipe lining material 1 is inverted by the pressure of the compressed air, Since the reversing device installed at is small and compact, the reversing work can be performed efficiently and efficiently. Further, since the air pressure is used for reversing the pipe lining material 1 as described above, the problem of the head difference that has occurred for the steep pipe line does not occur, and the conventional water pressure reversing method is used. The drawback of (method shown in FIG. 4) can be eliminated.

In the example shown in FIG. 1, the pipe lining material 1 previously impregnated with the curable resin is directly inverted into the aged pipe 10,
Although inserted, the method of the present invention can also be applied to inversion and insertion of the open liner 9 shown in FIG. 2 into the pipe lining material 11. That is, in the example shown in FIG. 2, the open liner 9 is inverted and inserted by using the method of the present invention into the pipe lining material 11 which is pre-deployed in the aged pipe 10 by using the guide tube 12. At this time, the open liner 9 is opened. The liner 9 pushes the curable resin 13 injected into the pipe lining material 11 in the inserting direction, and the curable resin 13 is evacuated by a vacuum hose 14 connected to a vacuum pump (not shown). The inside is sequentially impregnated.

Further, in the embodiment shown in FIG. 1, the two sealed bags 2 and 3 are used, but the number of the sealed bags may be one or three or more.

Next, the reversing method according to the second invention will be described with reference to the sectional view of FIG. In FIG. 3, the same elements as those shown in FIG. 1 are designated by the same reference numerals.

In the method of the present invention, a part of the pipe lining material 1 which has been previously impregnated with a curable resin is partially inverted and inserted into the aged pipe 10 by hydraulic pressure as in the case of the first embodiment.

Next, water is injected from the hose 7 into the closed tube 15, and the closed tube 15 is partially inverted and inserted into the pipe lining material 1 by the water pressure, and the aged pipe 10 is inserted.
A sealed space S defined by a sealed tube 15 filled with water is formed inside the pipe lining material 1 inserted therein.

By the way, an air hose 16 connected to an air compressor (not shown) is drawn into the closed tube 15, and an end portion of the air hose 16 is formed inside the pipe lining material 1 as shown in the drawing. It faces the closed space S.

If compressed air from an air compressor (not shown) is supplied into the closed space S through the air hose 16, the pipe lining material 1 is compressed by the compressed air as in the first embodiment of the invention. Received and turned over one after another, old pipe 1
0 is sequentially inserted, and the same effects as those obtained in the first invention can be obtained in the second invention. At this time, as shown in the drawing, the closed tube 15 and the pipe lining material 1
If a sealing agent 17 such as water, oil, or a polymer absorbent containing a large amount of water is supplied between the compressed air and the compressed air in the closed space S, the compressed air in the closed space S is released from the gap between the closed tube 15 and the pipe lining material 1 into the atmosphere. Leakage into the interior is prevented, the internal pressure in the closed space S is prevented from decreasing, and the pipe lining material 1 is reliably inverted.

[0029]

As is apparent from the above description, according to the present invention, a hermetically sealed bag body, which is impregnated with a curable resin and expands by receiving a supply of compressed gas, is partially provided on the outer peripheral portion thereof before inversion. By reversing and inserting a part of the pipe lining material configured to be attached into the pipe line by fluid pressure, by inserting compressed gas into the closed bag body to expand the closed bag body in the pipe line, A closed space is formed inside the pipe lining material inserted into the pipe, and the compressed gas is supplied to the closed space to sequentially invert the pipe lining material, or a part of the pipe lining material is fluidized by a pipe line. After inversion and insertion into the pipe lining material, a liquid is injected into the closed tube, and the closed tube is partially inverted and inserted into the pipe lining material to form a closed space inside the pipe lining material. Supply compressed gas to the space and Since you sequentially reversing the ring material, the effect is obtained that the tubular lining material can be easily reversed with a small-compact device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a reversing method according to a first invention method.

FIG. 2 is a cross-sectional view showing an application example of the first invention method.

FIG. 3 is a cross-sectional view showing a reversing method according to a second invention method.

FIG. 4 is a cross-sectional view showing a conventional inversion method (inversion method using water pressure).

FIG. 5 Conventional reversing method (reversing method using air pressure)
It is sectional drawing which shows.

FIG. 6 is a cross-sectional view showing a conventional inversion method (inversion method using water pressure and air pressure in combination).

[Explanation of symbols]

 1, 11 Pipe lining material 2, 3 Closed bag 9 Open liner 10 Aged pipe (pipe line) 15 Closed tube 17 Sealant

Claims (4)

[Claims] 1. A pipe lining material which is impregnated with a curable resin, and which is partially attached to an outer peripheral portion of the hermetically sealed bag body which is expanded by receiving a supply of a compressed gas before inversion. 2. A part of a pipe lining material which is impregnated with a curable resin and partially attached to an outer peripheral portion of the pipe bag lining material which is expanded by receiving a supply of a compressed gas before inversion. After being inverted and inserted into the pipe line by means of the above method, a compressed gas is supplied to the hermetically sealed bag body to expand the hermetically sealed bag body in the pipe line, thereby sealing the inside of the pipe lining material inserted in the pipe line. A method for reversing a pipe lining material, characterized in that a space is formed and a compressed gas is supplied to the closed space so that the pipe lining material is sequentially reversed. 3. A part of the pipe lining material is inverted and inserted into the pipe line by fluid pressure, and then a liquid is injected into the closed tube to partially invert and insert the closed tube into the pipe lining material. Thus, a closed space is formed inside the pipe lining material, and a compressed gas is supplied to the closed space to sequentially invert the pipe lining material. 4. The method of reversing a pipe lining material according to claim 3, wherein a sealant is supplied between the closed tube and the pipe lining material before reversal.