JP2702099B2 - Start liner with flange for branch pipe and 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 flanged start liner for a branch pipe and a pipe lining method using the same.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the ground becomes old, the pipeline is lined by lining the inner peripheral surface thereof without excavating the pipeline from the ground. A pipeline repair method for repair is known. In this pipe line repair method, a pipe lining material made by impregnating a curable resin into a flexible tubular resin absorbent material is inserted while being inverted into the pipe line by fluid pressure, and this is inserted into the pipe inner peripheral surface. This is a method in which the inner peripheral surface of the pipeline is lined by pressing and heating the tube lining material while maintaining this state to cure the curable resin impregnated therein.

By the way, in lining a pipe such as a sewer pipe where a plurality of branch pipes branch from a main pipe,
Lining is performed on the main pipe and the branch pipe, respectively.
An integrated lining was required to increase the airtightness of the connection between the two.

Here, the method of the above-mentioned integrated lining is shown in FIGS.

In the integrated lining, as shown in FIG. 14, the compressor 119 is operated while the flange 125A of the branch pipe lining material 125 having a flange 125A at one end is brought into close contact with the periphery of the branch pipe opening of the main pipe 110. When driven, compressed air is supplied into the pressure bag 113 to insert the branch pipe lining material 125 into the branch pipe 111 in a reverse direction from the main pipe 110 side toward the ground. The curable resin impregnated in the branch pipe lining material 125 is cured while being pressed against the inner peripheral wall to form the branch pipe 111.
(See FIG. 15).

Next, as shown in FIG. 15, the main pipe lining material 122 is inserted into the main pipe 110 by fluid pressure in a reverse direction, and then the main pipe lining material 122 is pressed against the inner peripheral wall of the main pipe 110. The main pipe 110 is lined by curing the curable resin impregnated in the main pipe lining material 122. Then, the main pipe lining material 122 and the flange 125A of the branch pipe lining material 125 are integrated with each other in a state where they are overlapped, and high airtightness is secured at the connection portion between the main pipe 110 and the branch pipe 111. After the main pipe lining material 122 has hardened, the branch pipe opening portion (the portion covering the branch pipe opening) of the main pipe lining material 122 is cut off by drilling.

[0007]

However, when the infiltration of groundwater into the main pipe and the branch pipe is severe, in the conventional lining method, the uncured curable resin impregnated in the lining material comes into direct contact with the groundwater. Insufficient curing of the curable resin causes insufficient strength of the lining material,
Since the curable resin flows through the flange portion of the branch pipe lining material, there is a problem that the main pipe lining material and the branch pipe lining material are not completely integrated at the flange portion.

[0008] The present invention has been made in view of the above problems, and an object thereof is to solve the problem of insufficient strength of a lining material due to poor curing of a curable resin even if groundwater infiltrates into a main pipe and a branch pipe. An object of the present invention is to provide a branch liner starter liner for a branch pipe and a pipe lining method capable of preventing and integrating a connecting portion between a main pipe and a branch pipe.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a flange formed into an arcuate curved surface along the inner diameter shape of the main pipe has a diameter substantially equal to the diameter of the branch pipe. The end liner tube and the pressure bag connection tube are attached at one end to form a flanged start liner for a branch pipe.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, each end of the start liner tube and the pressure bag connection tube is sandwiched between two flanges. I do.

Further, according to a third aspect of the present invention, there is provided a start liner tube and a pressure bag connection tube each having substantially the same diameter as a branch pipe formed on a flange formed into an arc-shaped curved surface along the inner diameter of the main pipe. The pressure bag connecting tube of the starter liner with a branch pipe is connected to a pressure bag and introduced into the main pipe, and the flange of the starter with the branch pipe with a flange is connected to the periphery of the branch pipe opening of the main pipe. After applying the fluid pressure in the pressure bag in a state of being in close contact with the pressure bag, the start liner tube is invertedly inserted from the main pipe side to the ground in the branch pipe, and the upper part of the start liner tube is pulled and fixed. While maintaining the state, using a main liner for starter liner to barrier the infiltration water, the main liner lining material impregnated with the curable resin is inserted upside down into the main line by fluid pressure. After hardening this, the branch pipe opening portion of the hardened main pipe lining material is cut off, and then the branch pipe lining material impregnated with the curable resin is invertedly inserted into the inside of the start liner tube from the upper end side by fluid pressure. The main pipe and the branch pipe are lined by cutting the tip of the hardened branch pipe lining material.

Therefore, according to the present invention, since the lining is applied to the branch pipe into which the groundwater infiltrates and the main pipe while the groundwater is being barrier-coated by the start liner tube, the branch pipe lining material and the main pipe lining material are impregnated. The cured resin does not come into direct contact with the groundwater, preventing the curing failure of the cured resin, ensuring the necessary and sufficient strength for each lining material, and the connection between the main pipe and the branch pipe. Integration becomes possible.

[0013]

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

FIG. 1 is a partially cutaway perspective view of a starter liner 1 having a flange for a branch pipe according to the present invention. In FIG. 1, reference numeral 2 denotes two ring-shaped flanges. The main pipe 10 (see FIG. 2) is formed into an arcuate curved shape along the inner diameter shape of the main pipe 10. That is, each tsuba 2 is made of a resin absorbent such as a non-woven fabric and the like, which is an unsaturated polyester resin, a vinyl ester resin,
The curable resin is impregnated with a curable resin such as an epoxy resin, and the curable resin impregnated with the curable resin is cured in advance so that each flange 2 maintains an arcuate curved shape as described above.

Thus, one end of a start liner tube 3 and one end of a pressure bag connection tube 4 having substantially the same diameter as an inner diameter of a branch pipe 11 (see FIG. 2) described later are sandwiched between the two flanges 2. It is sandwiched in a shape.

The start liner tube 3 is formed of a highly airtight plastic tube such as polyethylene / nylon / polyethylene, polyurethane, polyethylene, or vinyl chloride, and one end of the tube is folded outward as shown in the figure. The cut end is pushed outward in a petal shape by a plurality of cuts, and the pushed-out portion is sandwiched between two flanges 2 in a sandwich shape. A tubular resin absorbent 5 made of non-woven fabric is adhered to the inner periphery of the end of the start liner tube 3 close to the flange 2. It is sandwiched between a pair of flanges 2 in a sandwich shape. When the start liner tube 3 is inverted at a high pressure, the outer surface of the start liner tube 3 may be covered with a tubular woven fabric such as polyethylene or nylon.

On the other hand, the pressure bag connection tube 4 is also formed of a highly airtight plastic tube or the like, and one end thereof is sandwiched between two flanges 2 like the start liner tube 3.

The outer shape of the flange 2 is not limited to a circle, but may be an arbitrary shape such as a square, a rectangle, a hexagon, and other polygons.

Next, a pipe lining method using the starter liner 1 with a flange for a branch pipe configured as described above will be described with reference to FIGS. 2 to 10 are sectional views showing the pipe lining method according to the present invention in the order of steps, and FIG. 11 is an enlarged sectional view taken along line AA of FIG.

In FIG. 2, reference numeral 10 denotes a main pipe such as a sewer pipe;
Reference numeral 1 denotes a small-diameter branch pipe branched from the main pipe 10.
The work robot 12, the pressure bag 13, the branch starter liner 1 for branch pipes, and the like, which are preliminarily assembled and integrated on the ground, are drawn into the inside of the cylinder. A pressure bag connection tube 4 of the starter liner 1 for branch pipes is connected to one end of the pressure bag 13 via a connection pipe 14, and the other end of the pressure bag 13 is closed by a cup-shaped plug 15. ing.

The working robot 12 is driven by hydraulic pressure to move its head 16 up and down. The head 16 supports a flange-shaped set nozzle 17. A monitor TV camera 18 is provided above the work robot 12.

Then, a flanged start liner 1 for a branch pipe
The collar 2 is set on the set nozzle 17, and the unreversed portion of the start liner tube 3 is housed in the pressure bag 13 through the pressure bag connection tube 4.

In the pressure bag 13, an enclosed space S closed by the starter liner 1 for branch pipes and the plug 15 is formed, and the enclosed space S is installed on the ground. A compressor 19 is connected via an air hose 20.

In the above, the working robot 12 and the starter liner 1 with a flange for a branch pipe and the pressure bag 13 supported by the work robot 12 can be moved integrally in the main pipe 10.
While monitoring the inside of the main pipe 10 with the TV camera 18, as shown in FIG. 2, the flange 2 of the branch starter liner 1 is positioned at the opening of the branch pipe 11, and the head 16 of the working robot 12 is moved. By moving upward, the flange 2 of the flanged start liner 1 for the branch pipe is opened to the branch pipe opening of the main pipe 10 (the main pipe 1).
(The portion where the branch pipe 11 opens at 0) is pressed against the periphery of the branch pipe 11 to make it tightly adhere.

Next, when the compressor 19 installed on the ground is driven to supply compressed air to the closed space S in the pressure bag 13, as shown in FIG. The liner tube 3 is sequentially inserted from the main pipe 10 toward the ground side (upward) in the branch pipe 11 while being inverted under the pressure of the compressed air.

The branch pipe 1 of the start liner tube 3
When the inverted insertion into the inside 1 is completed, as shown in FIG. 3, the upper part of the start liner tube 3 is pulled and fixed on the ground side, and the work robot 12, the pressure bag 13, etc. except for the start liner 1 with the branch pipe flange. From the main pipe 10.

Next, as shown in FIG. 4, a highly airtight start liner tube 21 similar to the start liner tube 3 is invertedly inserted into the main tube 10 by fluid pressure, and penetrates into the main tube 10. The underground water is barrier | blocked with the start liner tube 21 for mains.

Start liner tube 21 for main pipe
When the inverted insertion into the main pipe 10 is completed, as shown in FIG. 5, a main pipe lining material 22 impregnated with a curable resin is formed.
Into the main pipe 10 (more precisely, the start liner tube 21 for the main pipe) by fluid pressure. The main pipe lining material 22 is configured by impregnating an uncured liquid curable resin into a tubular resin absorbent material whose outer surface is covered with a highly airtight plastic film.

Here, the tubular resin absorbent constituting the main pipe lining material 22 is made of a non-woven fabric such as polyester, polypropylene, nylon, acrylic, vinylon, etc., and the curable resin impregnated therein is an unsaturated polyester resin. Although a thermosetting resin such as a vinyl ester resin or an epoxy resin is used, a photocurable resin or the like may be used instead of the thermosetting resin. As the material of the plastic film coated on the outer surface of the tubular resin absorbent, polyurethane, polyethylene, polyethylene / nylon copolymer, vinyl chloride, and the like are selected.

When the main pipe lining material 22 is inserted into the main pipe 10 (start liner tube 21 for main pipe), fluid pressure is applied to the inside of the main pipe lining material 22 to cause the main pipe lining material 22 to act. When the main pipe lining material 22 is heated by any heating means while the lining material 22 is pressed against the inner peripheral wall of the main pipe 10, the thermosetting resin impregnated in the main lining material 22 is cured, and as shown in FIG. The inner peripheral surface of the pipe 10 is lined and repaired by the hardened main pipe lining material 22.

Next, as shown in FIG. 7, a work robot 23 is introduced into the main pipe 10, and a cutter 24 provided on the work robot 23 is driven to drive the main pipe lining material 2.
When the portion covering the branch pipe opening 2 is cut off by the cutter 24, the branch pipe 11 is opened to the main pipe 10.

When the lining of the main pipe 10 has been completed as described above, the branch pipe 1 is then made using the branch pipe lining material 25.
A lining is applied to 1. The branch pipe lining material 25 has the same configuration as the main pipe lining material 22.

That is, as shown in FIG. 8, the branch pipe lining material 25 is inserted inside the start liner tube 3 of the branch pipe flanged start liner 1 which is inserted into the branch pipe 11 upside down and whose upper part is towed and fixed. It is reversely inserted from the ground side toward the main pipe 10 by fluid pressure. At this time, the branch pipe 11
Even if there is infiltration of groundwater, the groundwater is barrier by the start liner tube 3, so that the thermosetting resin impregnated in the branch pipe lining material 25 does not directly contact the groundwater.

As shown in FIG. 9, the branch pipe lining material 25 is inserted upside down into the start liner tube 3 over its entire length, and as shown in FIG. With the branch pipe lining material 25 protruding inside the branch pipe lining material 25, the branch pipe lining material 25 is pressed against the inner peripheral wall of the branch pipe 11 by applying a fluid pressure to the inside of the branch pipe lining material 25. Is heated by an arbitrary heating means, the thermosetting resin impregnated therein is hardened, and the inner peripheral surface of the branch pipe 11 is hardened by the hardened branch pipe lining material 2.
5 lined and repaired. At this time, since the resin absorbing material 5 is adhered to the inner peripheral portion of the start liner tube 3 near the flange 2 as described above, the curable resin impregnated in the branch pipe lining material 25 is filled with the resin absorbing material. 5 and the curable resin is cured, whereby the resin absorbent 5 and the branch pipe lining material 25 and the flange 2 are joined and integrated.

Then, as described above, the branch pipe lining material 2
5 is hardened, the main pipe 10 of the branch pipe lining material 25 is hardened.
If the tip protruding into the (main pipe lining material 22) is cut as shown in FIGS. 10 and 11, the lining for the main pipe 10 and the branch pipe 11 is completed.

As described above, in the present embodiment,
The main pipe lining material 22 and the branch pipe lining material 25 are applied to the main pipe 10 and the branch pipe 11 into which the groundwater infiltrates by barrier the ground water with the start liner tubes 21 and 3, respectively.
Since the lining is performed using each of the lining materials, the thermosetting resin impregnated in the main pipe lining material 22 and the branch pipe lining material 25 does not come into direct contact with the groundwater, and poor curing of the thermosetting resin is prevented. Stripped main pipe lining material 22
The main pipe lining material 22 and the flange 2 of the branch starter liner 1 are joined and integrated, and the main pipe 1
0 and the connecting portion of the branch pipe 11 can be integrated.

The pipe lining method according to the present invention can be similarly applied to a box culvert pipe having a rectangular cross section. An example thereof will be described with reference to FIGS.

In FIG. 12, reference numeral 30 denotes a box culvert pipe, and 31 denotes a branch pipe branching from the box culvert pipe 30.
After the start liner tube 3 is inserted into the branch tube 31 by fluid pressure from the box culvert tube 30 side to the ground in a state where the flange 2 of the box culvert tube 30 is brought into close contact with the periphery of the branch tube opening portion of the box culvert tube 30, The upper part of the liner tube 3 is fixed with the through plug 26.

Next, as shown in FIG. 13, the box culvert pipe 30 was lined with the main pipe lining material 22, and the opening of the branch pipe of the hardened main pipe lining material 22 was cut off by drilling. After that, the branch liner lining material 25 is moved to the start liner tube 3 by fluid pressure.
It is inserted into the inside of the inside from the upper end side to cure it. Thereafter, if the tip of the hardened branch pipe lining material 25 is cut, the box culvert pipe 30 and the branch pipe 31 can be lined, and the same effect as described above can be obtained.

[0040]

As is apparent from the above description, according to the present invention, the lining is performed on the branch pipe into which the groundwater infiltrates and the main pipe while the groundwater is barrier-coated by the start liner tube. The curable resin impregnated in the lining material and the main pipe lining material does not come into direct contact with the groundwater, thereby preventing poor curing of the curable resin and ensuring the necessary and sufficient strength for each lining material. An effect is obtained in that the connection between the main pipe and the branch pipe can be integrated.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of a flanged start liner for a branch pipe according to the present invention.

FIG. 2 is a sectional view showing a pipe lining method according to the present invention.

FIG. 3 is a sectional view showing a pipe lining method according to the present invention.

FIG. 4 is a sectional view showing a pipe lining method according to the present invention.

FIG. 5 is a sectional view showing a pipe lining method according to the present invention.

FIG. 6 is a sectional view showing a pipe lining method according to the present invention.

FIG. 7 is a sectional view showing a pipe lining method according to the present invention.

FIG. 8 is a sectional view showing a pipe lining method according to the present invention.

FIG. 9 is a sectional view showing a pipe lining method according to the present invention.

FIG. 10 is a sectional view showing a pipe lining method according to the present invention.

FIG. 11 is an enlarged sectional view taken along line AA of FIG. 10;

FIG. 12 is a sectional view showing an embodiment in which the pipe lining method according to the present invention is applied to a box culvert pipe.

FIG. 13 is a sectional view showing an embodiment in which the pipe lining method according to the present invention is applied to a box culvert pipe.

FIG. 14 is a cross-sectional view showing a conventional pipe lining method (integrated lining method).

FIG. 15 is a cross-sectional view showing a conventional pipe lining method (integrated lining method).

FIG. 16 is a cross-sectional view showing a conventional pipe lining method (integrated lining method).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Starter liner with flange for branch pipe 2 Flange 3 Start liner tube 4 Connection tube for pressure bag 10 Main pipe 11, 31 Branch pipe 13 Pressure bag 21 Start liner tube for main pipe 22 Main pipe lining material 25 Branch pipe lining material

Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 9:00 23:00

Claims (3)

(57) [Claims] The present invention is characterized in that a flange formed into an arc-shaped curved surface along the inner diameter shape of a main pipe is attached with one end of a start liner tube and a pressure bag connection tube having substantially the same diameter as the diameter of a branch pipe. A starter liner with a collar for branch pipes. 2. The start liner with a flange for a branch pipe according to claim 1, wherein one end of each of the start liner tube and the pressure bag connection tube is sandwiched between two flanges. 3. A branch pipe constituted by attaching one end of a start liner tube and one end of a pressure bag connection tube having substantially the same diameter as the diameter of the branch pipe to a flange formed into an arc-shaped curved surface along the inner diameter of the main pipe. The pressure bag connection tube of the flanged start liner is connected to a pressure bag, these are introduced into the main pipe, and the pressure is applied while the flange of the flanged start liner for the branch pipe is in close contact with the periphery of the branch pipe opening of the main pipe. After applying the fluid pressure to the inside of the bag and inserting the start liner tube into the branch pipe in a reverse direction from the main pipe side toward the ground, the upper part of the start liner tube is pulled and fixed, and the main pipe is started while maintaining the state. The main pipe lining material impregnated with the curable resin was reversely inserted into the main pipe by fluid pressure while the infiltration water was barrier using a liner, and this was hardened and hardened. After cutting off the branch pipe opening portion of the main pipe lining material, the branch pipe lining material impregnated with the curable resin is reversely inserted into the inside of the start liner tube from the upper end side by fluid pressure, and is cured. A pipe lining method, characterized in that the hardened side pipe lining material is cut at its distal end to line the main pipe and the branch pipe.