JP2678148B2 - Branch pipe lining material and 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 branch pipe lining material formed by partially thickening a portion adjacent to a collar portion and a branch 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. There is a known pipe lining method for repair. This pipe lining method
A pipe lining material made by impregnating a flexible tubular non-woven fabric with a curable resin is inserted into the pipe line while being inverted by fluid pressure, and is pressed against the inner peripheral surface of the pipe line while maintaining this state. In this method, the pipe lining material is heated to cure the curable resin impregnated in the pipe lining material, thereby lining the inner peripheral surface of the pipe line.

By the way, the above pipe lining method is applied to a branch pipe branched from the main pipe as it is, but in particular, the branch pipe lining material is introduced into the main pipe with the collar portion folded back. In the branch pipe lining method, in which the branch pipe lining material is fluidly pressed into the branch pipe from the main pipe side toward the ground in an inverted manner with the brim portion of the lining material being in close contact with the peripheral edge of the branch pipe opening, After the lining of the branch pipe is applied, the lining of the main pipe is performed using the main lining material, and the collar portion of the branch lining material and the main lining material are integrated, but the main lining material is In order to cover the branch pipe opening (the part where the branch pipe opens to the main pipe), it is necessary to cut off the covering part to connect the branch pipe to the main pipe.

The cutting of the part of the main lining material covering the branch pipe opening (drilling) is performed by, for example, remotely controlling the cutter introduced into the main pipe while monitoring the inside of the main pipe with a TV camera. Done by

[0005]

However, when the main lining material is drilled while the cutter is remotely operated as described above, the opening of the branch lining material may be erroneously over-cut, and the portion may be cut too much. There are cases where holes are formed and groundwater and the like enter, and holes are formed in the integrated portion of the flange portion of the branch pipe lining material and the main pipe lining material to hinder the integration of the two.

The present invention has been made in view of the above problems, and an object of the present invention is to cut the opening of the branch pipe lining material too much in the drilling operation of the main pipe lining material. It is an object of the present invention to provide a branch pipe lining material and a branch pipe lining construction method capable of preventing various problems due to holes being formed in the portion.

[0007]

In order to achieve the above object, the invention according to claim 1 is a branch including a tubular resin absorbent material having a collar portion at one end and impregnated with a curable resin. In the pipe lining material, a portion of the tubular resin absorbent material adjacent to the flange portion is partially thickened.

According to a second aspect of the present invention, a branch is formed by partially thickening a portion of a tubular resin absorbent material having a collar portion at one end and impregnated with a curable resin, which is close to the collar portion. Introduce the pipe lining material into the main pipe with its collar folded back,
With the collar portion of the branch pipe lining material in close contact with the peripheral edge of the branch pipe opening of the main pipe, the branch pipe lining material is fluidly pressed into the branch pipe from the main pipe side toward the ground, and the branch pipe lining is inserted. The curable resin impregnated in the branch pipe lining material is cured while the material is pressed against the inner peripheral surface of the branch pipe.

[0009]

According to the present invention, since the thickness of the portion (opening of the branch pipe lining material) near the brim portion of the tubular resin absorbent material forming the branch pipe lining material is partially thick, the cutter Even when the opening of the branch pipe lining material is accidentally cut too much in the drilling work of the main lining material by the above, there is no hole in that portion and groundwater etc. does not enter there, or the branch There is no possibility that a hole is formed in the integrated portion of the flange portion of the pipe lining material and the main pipe lining material and the integration of the both is prevented.

[0010]

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

FIG. 1 is a partial cross-sectional view of a branch pipe lining material 1 according to the present invention. The branch pipe lining material 1 includes a tubular resin absorbent material 2 made of non-woven fabric, one end of which is outward A flange-shaped collar portion 3 folded back is formed. Then, another short tubular resin absorbent 4 made of non-woven fabric is adhered to the inner peripheral portion of the tubular resin absorbent 2 close to the collar portion 3, and the tubular resin absorbent 4 is folded back to the outside and opened. The thickness of the portion of the branch pipe lining material 1 near the collar portion 3 is partially thickened by the tubular resin absorbent material 4.

Thus, the tubular resin absorbents 2, 4 of the branch pipe lining material 1 are impregnated with an uncured liquid thermosetting resin, and the outer surface of the tubular resin absorbent 2 is airtight. A high plastic film 5 is coated. Further, a highly airtight plastic tube 6 is inserted into the tubular resin absorbent materials 2 and 4. In addition, polyester, polypropylene, nylon, acrylic, vinylon, etc. are selected as the material of the non-woven fabric forming the tubular resin absorbents 2, 4.
An unsaturated polyester resin, an epoxy resin or the like is used as the thermosetting resin impregnated in these. Further, as the material of the plastic film 5 and the plastic tube 6, polyurethane, polyethylene, polyethylene / nylon copolymer, vinyl chloride or the like is selected.

By the way, the collar portion 3 is a main pipe 10 described later.
(Refer to FIG. 2) The curved surface is curved in an arc shape with the same curvature as the inner peripheral surface, and its outer diameter is set to be larger than the inner diameter of the branch pipe 11 (see FIG. 2) described later. The brim portion 3 retains its shape as the curable resin impregnated therein is cured.

Further, in the branch pipe lining material 1, a peeling tube 7 having a predetermined length is provided outside the tubular resin absorbent material 2.
, One end of the peeling tube 7 is peelably bonded to the outer periphery of the tubular resin absorbent material 2 (plastic tube 5) close to the flange 3, and the other end is open. The material of the peeling tube 7 is the same as the plastic film 5 and the plastic tube 6.

Next, a branch pipe lining method using the branch pipe lining material 1 configured as described above will be described with reference to FIGS. 2 to 6. 2 to 6 are sectional views showing the branch pipe lining method according to the present invention in the order of steps.

In FIG. 2, 10 is a main pipe such as a sewer pipe, and 1
Reference numeral 1 denotes a small-diameter branch pipe branched from the main pipe 10.
The working robot 12, the pressure bag 13, the branch pipe lining material 1, and the like, which are preliminarily assembled and integrated on the ground, are drawn into the inside of the cylinder.

The working robot 12 is driven by hydraulic pressure, and its head 14 moves up and down. The head 14 supports a flange-shaped set nozzle 15. A monitor TV camera 16 is provided above the work robot 12.

On the other hand, the pressure bag 13 is attached to the set nozzle 15, and the open end of the peeling tube 7 is attached to the pressure bag 13. The branch pipe lining material 1 has its flange 3 set on the set nozzle 15 and has another unreversed portion (the portion of the tubular resin absorbent material 2 excluding the flange 3 and the peeling tube 8).
Are housed in the pressure bag 13 through the set nozzle 15.

Thus, a closed space S defined by the branch pipe lining material 1 and the peeling tube 7 is formed in the pressure bag 13, and the closed space S is installed on the ground. The compressor 17 and a hot water supply device (not shown) are connected.

In the above, the working robot 12 and the branch pipe lining material 1 and the pressure bag 13 and the like supported by the working robot 12 can be moved integrally in the main pipe 10. While monitoring
As shown in FIG. 2, the collar portion 3 of the branch pipe lining material 1 is attached to the branch pipe 1
1 and the head 14 of the work robot 12 is moved upward to move the collar portion 3 of the branch pipe lining material 1 into the main pipe 1.
Branch pipe opening of 0 (the part where the branch pipe 11 opens to the main pipe 10)
It is pressed against the peripheral edge of to bring it into close contact.

Next, the compressor 1 installed on the ground
When the compressed air is supplied to the closed space S in the pressure bag 13 by driving the compressed air 7, the branch pipe lining material 1 receives the pressure of the compressed air and inverts as shown in FIG.
The inside 1 is sequentially inverted and inserted from the main pipe 10 toward the ground side (upward). At this time, the closed space S is hermetically sealed by the peeling tube 7.

The branch pipe 1 of the branch pipe lining material 1
When the reverse insertion into 1 is completed, the hot water supply device (not shown) installed on the ground is driven to supply the hot water to the closed space S, and the compressed air in the closed space S is replaced with the hot water. Then, the branch pipe lining material 1 is heated while being pressed against the inner peripheral wall of the branch pipe 11, and the thermosetting resin impregnated in the tubular resin absorbent material 2 is cured, and the branched pipe 11 is cured. The inner peripheral surface is lined and repaired by the pipe lining material 1.

When the branch pipe lining material 1 is hardened as described above, hot water is drained from the closed space S and the head 14 of the work robot 12 is moved downward to move the set nozzle 15 to the collar portion of the branch pipe lining material 1. After being separated from 3, the work robot 12, the pressure bag 13, the peeling tube 7 and the like are integrally pulled in one direction. Then, since the peeling tube 7 is peeled from the inner peripheral surface of the tubular resin absorbent material 2 of the branch pipe lining material 1, the work robot 12 and the pressure bag 1
3, the peeling tube 7 and the like can be integrally removed from the main pipe 10, and as shown in FIG. 3, only the hardened branch pipe lining material 1 is left in the branch pipe 11, where a series of linings is provided. The work is finished.

When all the branch pipes 11 have been lined as described above, the main pipe 10 is then lined. When lining the main pipe 10,
As shown in FIG. 3, the main lining material 18 is inverted and inserted into the main pipe 10 by fluid pressure. The main pipe lining material 18 is formed by impregnating an uncured liquid thermosetting resin into a tubular resin absorbent material made of a non-woven fabric, and the outer surface thereof is covered with a highly airtight plastic film.

When the reverse insertion of the main pipe lining material into the main pipe 10 is completed, the main pipe lining material 18 is moved to the main pipe 1.
If the main lining material 18 is heated by an arbitrary heating means while being pressed against the inner peripheral surface of 0, the thermosetting resin impregnated in the main lining material 18 is cured, and as shown in FIG. The peripheral surface is lined and repaired by the hardened main pipe lining material 18, and the main pipe lining material 18 is in close contact with the flange portion 3 of the branch pipe lining material 1, and the main pipe lining material 18 and the branch pipe 3 through the flange portion 3. The pipe lining material 1 is joined and integrated.

When the main pipe 10 is lined as described above, the main pipe lining material 18 covers the branch pipe opening (the portion where the branch pipe 11 opens to the main pipe 10). It is necessary to cut off the covering portion so that the branch pipe 11 communicates with the main pipe 10.

Therefore, as shown in FIG. 5, a robot 19 is introduced into the main pipe 10, and a cutter 20 provided in the robot 19 drills a hole in the main pipe lining material 18. That is, the TV camera 2 installed in the robot 19
1 and the TV camera 22 introduced into the branch pipe 11 drives the cutter 20 by the history operation while monitoring the portion to be drilled on the ground, and the main lining material 1
When the portion of 8 which covers the branch pipe opening is cut by the cutter 20, the branch pipe 11 is opened to the main pipe 10.

By the way, as shown in FIG. 5, in the vicinity of the opening of the branch pipe lining material 1 to the main pipe 10 (the portion close to the collar portion 3), the thickness is partially due to the tubular resin absorbent material 4. Since it is thicker, even if the vicinity of the opening of the branch pipe lining material 1 is accidentally cut too much by the cutter 20, there is no hole in that portion and groundwater or the like does not enter there, Furthermore, a hole is not formed in the integrated portion of the collar portion 3 of the branch pipe lining material 1 and the main pipe lining material 18, and the integration of both is not hindered. Alternatively, when deploying the cable passage tube at the same time as the lining,
The problem that the cable passage tube is damaged due to excessive cutting by the cutter 20 does not occur.

When the drilling work is completed for all parts of the main pipe lining material 18 (all parts covering the openings of the branch pipes 11), as shown in FIG. Opens into the main pipe 10, where the branch pipe 11 and the main pipe 10
A series of lining work for is completed.

[0030]

As is apparent from the above description, according to the present invention, the thickness of the portion (opening of the branch pipe lining material) close to the flange portion of the tubular resin absorbent material forming the branch pipe lining material. Since the part is partially thick, even if the opening of the branch pipe lining material is cut too much in the drilling work of the main pipe lining material with a cutter, the hole will be made in that portion and groundwater etc. Can be prevented from penetrating, or an effect can be obtained that a hole is not formed in an integrated portion of the flange portion of the branch pipe lining material and the main pipe lining material and the integration of the two is not hindered.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a lateral pipe lining material according to the present invention.

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

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

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

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

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

[Explanation of symbols]

 1 Branch Pipe Lining Material 2 Tubular Resin Absorbing Material 3 Collar 4 Tubular Resin Absorbing Material 10 Main Pipe 11 Branch Pipe 18 Main Pipe Lining Material 20 Cutter

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B29L 23:00 (56) References JP-A-63-167193 (JP, A) JP-A-6- 270253 (JP, A) JP-A-7-32480 (JP, A)

Claims (2)

(57) [Claims] 1. A branch pipe lining material comprising a tubular resin absorbent material having a collar portion at one end and impregnated with a curable resin, wherein a portion of the tubular resin absorbent material adjacent to the collar portion is a portion. Branch pipe lining material characterized by being made thicker. 2. A branch pipe lining material constituted by partially thickening a portion of a tubular resin absorbent material having a collar portion at one end and impregnated with a curable resin, which portion is close to the collar portion, Introduced into the main pipe in a folded state, with the flange portion of the branch pipe lining material in close contact with the peripheral edge of the branch pipe opening of the main pipe, the branch pipe lining material is fluidized into the branch pipe from the main pipe side to the ground. A branch pipe lining method, wherein the curable resin impregnated in the branch pipe lining material is cured while the branch pipe lining material is pressed and inserted against the inner peripheral surface of the branch pipe.