JPH1120021A - Branch pipe lining material and method for lining branch pipe using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch pipe lining material for preventing occurrence of wrinkle by simply positioning a collar at a branch pipe opening in a short time, and a method for lining the branch pipe using the material. SOLUTION: The method for lining a branch pipe using a branch pipe lining material comprises the steps of inserting a body part except a collar 3 of the material 1 made by reducing an inner diameter of the collar 3 smaller than that of a tubular resin adsorption material 2 after curing into a pressure bag 7, coupling a branch pipe lining unit 5 for forming a sealed space S in the bag 7 by interposing an elastic member 9 between setting heads 8 mounted at the collar 3 of the material 1 at one end opening of the bag 7, to an operating robot 6 to move in a main tube 10, supplying pressure fluid to the space S in the state that the collar 3 of the material 1 is brought into close contact with a peripheral edge of the branch pipe opening of the tube 10 to invert and insert the material 1 from the tube 10 side into the branch pipe 11 toward the ground, and pressurizing the space S to cure curable resin impregnated into the material 1 while the material 1 is being pressed to an inner wall of the branch pipe 11 as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lateral pipe lining material having a hardened flange at one end, and a lateral pipe lining method constructed 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 tube lining material obtained by impregnating a flexible tubular resin adsorbent material with an uncured curable resin is invertedly inserted into a pipe by fluid pressure, and this is pressed against the inner peripheral surface of the pipe, and the state is changed. This is a method of lining the inner peripheral surface of a pipe line by heating the pipe lining material while keeping it and curing the curable resin impregnated therein.

By the way, a plurality of branch pipes join a main pipe such as a sewer pipe, and these branch pipes can be lined by the same method as described above. That is,
A branch pipe lining material obtained by impregnating an uncured curable resin into a tubular resin adsorbent material having a cured flange at one end and an outer surface covered with a highly airtight plastic film is introduced into the main pipe, With the flange portion of the branch pipe lining material closely contacting the periphery of the branch pipe opening portion of the main pipe, the branch pipe lining material is reversely inserted into the branch pipe from the main pipe side to the ground by fluid pressure, and the branch pipe lining material is While pressing the inner wall of the branch pipe, the curable resin impregnated therein is cured to line the branch pipe.

[0004]

However, in the conventional branch pipe lining material, the flange is formed so that the inner diameter thereof is the same as the inner diameter of the cured tubular resin adsorbent. In order to make the working robot introduced into the branch support the flange of the branch pipe lining material, and monitor the inside of the main pipe on the ground with a TV camera, the cylindrical part of the flange is accurately fitted into the branch pipe opening and positioned. Took a lot of skill and time.

[0005] If the flange portion is slightly displaced from the branch tube opening due to the inaccurate positioning of the flange portion of the branch tube lining material with respect to the branch tube opening portion, the misaligned portion of the branch tube is displaced. There is a problem that wrinkles occur in the lining material.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to enable the positioning of a flange portion to a branch pipe opening to be performed easily in a short time, thereby preventing wrinkles from occurring. And a branch pipe lining method using the same.

[0007]

In order to achieve the above object, the invention according to claim 1 is a tubular resin adsorbent having a hardened flange at one end and an outer surface covered with a highly airtight plastic film. In a branch pipe lining material obtained by impregnating an uncured curable resin into a pipe, an inner diameter d1 of the flange portion is made smaller than an inner diameter d of the cured tubular resin adsorbent.

According to a second aspect of the present invention, in the first aspect of the present invention, a cylindrical portion or a plurality of convex portions along the circumference thereof are formed on the flange portion so as to be continuous with the tubular resin adsorbent. Alternatively, the height h of the projection is set to 0.5 m / m to 50 m / m.

According to a third aspect of the present invention, in the second aspect of the present invention, the outer diameter φ1 of the cylindrical portion or the convex portion of the flange is smaller than the inner diameter φ of the branch pipe opening.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the outer diameter D of the maximum diameter portion of the flange is larger than the inner diameter φ of the branch pipe opening. I do.

According to a fifth aspect of the present invention, in the first or second aspect, the plastic film is covered with the plastic film including a boundary portion between the outer surface of the tubular resin adsorbent and the flange. Is air-tightly processed.

According to a sixth aspect of the present invention, an uncured curable resin is impregnated into a tubular resin adsorbent having a cured flange at one end and an outer surface covered with a highly airtight plastic film. The main body portion except the flange portion of the branch pipe lining material having the inner diameter d1 of the portion smaller than the inner diameter d of the cured tubular resin adsorbent is inserted into the pressure bag, and the flange portion of the branch pipe lining material is removed. A branch pipe lining unit capable of forming a closed space defined by a branch pipe lining material in the pressure bag by setting an elastic body between the setting head and the setting head attached to one end opening of the pressure bag. Is connected to a working robot to move the inside of the main pipe, the flange of the branch pipe lining material is brought into close contact with the periphery of the branch pipe opening of the main pipe, and the setting head is pushed toward the main pipe wall. In this state, the interposed portion of the elastic body is sealed, a pressurized fluid is supplied to the sealed space, and the branch pipe lining material is inserted upside down from the main pipe side into the ground in the branch pipe, thereby adding the sealed space. The curable resin impregnated in the branch pipe lining material is cured while pressing the branch pipe lining material against the inner wall of the branch pipe.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, an outer circumferential radius R of the setting head is provided.
3 is set to be smaller than the circumferential arc radius R2 of the flange of the branch pipe lining material, R2 and R3 are set to be smaller than the radius R1 of the main pipe, and when the setting head is pressed against the inner wall of the main pipe. A height h which forms a cylindrical portion or a plurality of convex portions along the circumference thereof inside the tube in the direction of the tube
1 is formed, and the outer diameter d2 of the setting collar is set smaller than the inner diameter d1 of the flange.

Therefore, according to the branch pipe lining method according to claim 6 or 7, which is performed using the branch pipe lining material according to claims 1 to 5, the outer diameter of the cylindrical portion of the flange portion of the branch pipe lining material. Since φ1 is smaller than the inner diameter φ of the branch pipe opening, the positioning of the flange to the branch pipe opening can be easily performed in a short time.

Further, since a cylindrical portion having a height h is formed on the flange of the branch pipe lining material, the flange is positioned at the branch pipe opening as long as the flange is in close contact with the periphery of the branch pipe opening of the main pipe. It is confirmed that the flange portion is displaced from the branch pipe opening during the curing of the tubular resin adsorbent so that the cylindrical portion of the flange engages with the branch pipe opening to function as an anchor. No wrinkles are generated in the branch pipe lining material.

[0016]

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

FIG. 1 is a 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 adsorbent 2 made of a nonwoven fabric, and has one end folded outward. A hardened flange portion 3 is formed. An uncured liquid thermosetting resin is impregnated in the main body portion of the branch pipe lining material 1 except for the flange portion 3 of the tubular resin adsorbent material 2, and the outer surface of the tubular resin adsorbent material 2 is airtight. And the end portions of the tubular resin adsorbent 2 and the plastic film 4 are hermetically sealed as shown. In addition, polyester, polypropylene, nylon, acrylic, vinylon, and the like are selected as the material of the nonwoven fabric forming the tubular resin adsorbent 2, and the uncured thermosetting resin impregnated therein is an unsaturated polyester resin, an epoxy resin, or the like. Are used. The material of the plastic film 4 is selected from polyurethane, polyethylene, polyethylene / nylon copolymer, vinyl chloride and the like.

Incidentally, the flange 3 is provided with a main pipe 10 to be described later.
(See FIG. 2). The flange portion 3a has a curved surface that is curved in an arc shape at the same curvature as the inner peripheral surface of the inner peripheral surface (see FIG. 2), and the cylindrical portion 3b is connected to the tubular resin adsorbent 2 continuously with the flange portion 3a. The plastic film 4 air-tightly covers the outer surface of the tubular resin adsorbent 2 including the boundary with the flange 3. Note that the flange 3 may be formed with a plurality of protrusions along the circumference instead of the cylindrical portion 3b.

In the branch pipe lining material 1 according to the present invention, as shown in FIG. 6, the inner diameter d1 of the flange 3 is smaller than the inner diameter d of the cured tubular resin adsorbent 2 (d1 <d).
At the same time, the outer diameter φ1 of the cylindrical portion 3b of the flange portion 3 is made smaller than the inner diameter φ of the branch pipe opening (the portion where the branch pipe 11 opens to the main pipe 10) (φ1 <φ), and The height h is set to 0.5 m / m to 50 m / m. The outer diameter D of the flange 3a of the flange 3 is set to be larger than the inner diameter φ of the branch pipe opening (D> φ).
The flange 3 including the cylindrical portion 3a and the cylindrical portion 3b retains its shape as the curable resin impregnated therein hardens.

Next, a branch pipe lining method constructed by using the branch pipe lining material 1 configured as described above is shown in FIG.
This will be described with reference to FIGS.

2 to 6 are sectional views showing a branch pipe lining method according to the present invention in the order of steps. In the drawings, reference numeral 10 denotes a main pipe such as a sewer pipe, and 11 denotes a small-diameter branch that merges with the main pipe 10. Tube.

In the branch pipe lining method according to the present embodiment, as shown in FIG. 2, the branch pipe lining unit 5 including the branch pipe lining material 1 is connected to the working robot 6. It is movably introduced into the main pipe 10.

Here, the branch pipe lining unit 5
Inserts the main body portion of the branch pipe lining material 1 except for the flange portion 3 into the pressure bag 7, and connects the flange portion 3 of the branch pipe lining material 1 to the one end opening of the pressure bag 7. A closed space S defined by the lateral pipe lining material 1 is formed in the pressure bag 7 by closely interposing an elastic body 9 such as rubber therebetween.

An air hose 12 is connected to the end of the pressure bag 7, and one end of the air hose 12 is open to the closed space S in the pressure bag 7. The end is connected to an air compressor (not shown) installed on the ground.

The working robot 6 is driven by hydraulic pressure so that its head 6a moves up and down in the directions of arrows a and b in FIG. 2 and rotates in the direction of arrow c. The setting head 8 of the branch pipe lining unit 5 is detachably attached via a plurality of pressing arms 13. The pressing arm 13 is a cylindrical portion 8 through which the branch pipe lining material 1 of the setting head 8 passes.
It is arranged on or near a diagonal line passing through the axis center of a.

A monitor TV camera 14 is provided above the working robot 6.
Is connected to the hydraulic cable 16 and the tow rope 17 are connected to the working robot 6.

In the above, the work robot 6 and the branch pipe lining unit 5 supported by the work robot 6 can be moved integrally in the main pipe 10, but the inside of the main pipe 10 is monitored on the ground by the TV camera 14. As shown in FIG. 2, the flange 3 of the branch pipe lining material 1 is positioned at the opening of the branch pipe 11.

Here, in the branch pipe lining material 1,
Since the outer diameter φ1 of the cylindrical portion 3b of the flange 3 is set smaller than the inner diameter φ of the branch pipe opening, the cylindrical portion 3b of the flange 3
b can be easily positioned in the branch opening in a short time,
When the cylindrical portion 3b is fitted into the branch pipe opening, a predetermined clearance is formed between the cylindrical portion 3b and the inner peripheral wall of the branch pipe opening as shown in FIG.

As described above, the flange 3 of the branch pipe lining material 1
Is positioned at the branch pipe opening, the working robot 12
The head 14 of the branch pipe lining material 1 to move the flange 3
Is pressed against the peripheral edge of the opening of the branch pipe of the main pipe 10 to bring it into close contact. In this case, the cylindrical portion 3b of the flange portion 3
Is set to 0.5 m / m to 50 m / m,
As long as the flange 3a of the flange 3 is in close contact with the periphery of the branch pipe opening of the main pipe 10, it is confirmed that the flange 3 is positioned at the branch pipe opening and the cylindrical part of the flange 3 3
Since b engages with the branch pipe opening to function as an anchor, the displacement of the flange 3 from the branch pipe opening is reliably prevented.

Next, an air compressor (not shown) installed on the ground is driven to supply compressed air to the air hose 12.
As shown in FIG. 3, the main body portion (tubular resin adsorbent material 2) of the branch pipe lining material 1 excluding the flange portion 3 is inverted by receiving the pressure of the compressed air as shown in FIG. While being inserted into the branch pipe 11, the main pipe 10 is sequentially inserted toward the ground side (upward). In this case, as described above, the plastic film 4 air-tightly covers and seals the outer surface of the tubular resin adsorbent 2 including the boundary with the flange 3,
The elastic body 9 is interposed between the flange 3 and the setting head 8, and the flange 3 is evenly pressed to the periphery of the branch pipe opening of the main pipe 10 by the plurality of pressing arms 13. The high airtightness is maintained, the leakage of compressed air from the closed space S is prevented, and the inverted insertion of the branch pipe lining material 1 into the branch pipe 11 is reliably performed. Note that an air bag may be used as the elastic body 9.

When the inversion insertion of the branch pipe lining material 1 into the branch pipe 11 is completed as described above, as shown in FIG. 4, the branch pipe lining material 1 is removed by the pressure of the compressed air.
The branch pipe lining material 1 is heated by any means while being pressed against the inner peripheral wall of the branch pipe. Then, the thermosetting resin impregnated in the tubular resin adsorbent 2 of the branch pipe lining material 1 is hardened by heat, and the hardened branch pipe lining material 1 lines and repairs the branch pipe 11.

When the branch pipe lining material 1 is pressurized in the case where there is a bend near the opening of the branch pipe 11, a force for straightening the branch pipe lining material 1 acts on the branch pipe lining material 1 so that the flange portion is formed. In this embodiment, since the cylindrical portion 3b of the flange 3 engages with the branch pipe opening and functions as an anchor, the flange 3 is hardened during the curing of the tubular resin adsorbent 2. 3 does not shift from the branch pipe opening, and wrinkles do not occur in the branch pipe lining material 1.

As described above, the branch pipe lining material 1
When the setting is completed, the head 6a of the working robot 6 is moved downward to separate the setting head 8 and the elastic body 9 from the flange 3 of the branch pipe lining material 1 as shown in FIG. When removed together with the pressure bag 7 and the like, for example, to the right in FIG. 5, the hardened branch pipe lining material 1 is left in the branch pipe 11, as shown in FIG. A series of lining work ends.

As shown in FIG. 7, the outer circumferential radius R3 of the setting head 8 is smaller than the circumferential radius R2 of the flange 3 of the lateral pipe lining material 1 (R3 <R2).
If the radius R1 of the main pipe 10 is set to be larger than R2 and R3 (R1> R2, R3), the branch pipe lining is performed with the elastic body 9 interposed between the setting head 8 and the flange 3. By pressing the flange 3 of the material 1 against the periphery of the branch pipe opening of the main pipe 10, the space between the flange 3 and the inner wall of the main pipe 10 and the space between the elastic body 9 and the flange 8 and the setting head 8 are airtight. Can be sealed tightly.

As shown in the figure, when the setting head 8 is pressed against the inner wall of the main pipe 10, a cylindrical portion or a plurality of convex portions along the circumference thereof are formed inside the branch pipe 11 with respect to the direction of the branch pipe 11. If the setting collar 8b having the height h1 is formed on the setting head 8, the flange 3 of the branch pipe lining material 1 is moved from the setting head 8 even when the branch pipe lining unit 5 (see FIG. 2) is moved within the main pipe 10. It does not come off.

Further, the outer diameter d2 of the setting collar 8b formed on the setting head 8 is changed to the inner diameter d1 of the flange 3.
If it is set smaller (d2 <d1), the flange 3 of the lateral pipe lining material 1 can be easily inserted into the setting collar 8b.

[0037]

As is apparent from the above description, claim 1
According to the branch pipe lining method according to claim 6 or 7, which is performed using the branch pipe lining material according to any one of (1) to (5), the outer diameter φ1 of the cylindrical portion of the flange portion of the branch pipe lining material is changed to the inner diameter of the branch pipe opening. Since the diameter is smaller than φ, the positioning of the flange to the branch pipe opening can be easily performed in a short time.

Further, since a cylindrical portion having a height h is formed on the flange of the branch pipe lining material, the flange is positioned at the branch pipe opening as long as the flange is in close contact with the periphery of the branch pipe opening of the main pipe. It is confirmed that the flange portion is displaced from the branch pipe opening during the curing of the tubular resin adsorbent so that the cylindrical portion of the flange engages with the branch pipe opening to function as an anchor. No wrinkles are generated in the branch pipe lining material.

[Brief description of the drawings]

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

FIG. 2 is a 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.

FIG. 7 is a cross-sectional view of a main pipe and a branch pipe showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Branch pipe lining material 2 Tubular resin adsorbent 3 Flange 3a Flange 3b Cylindrical part 4 Plastic film 5 Branch pipe lining unit 6 Work robot 7 Pressure bag 8 Setting head 9 Elastic body 10 Main pipe 11 Branch pipe S Closed space

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B29L 23:00 (72) Inventor Yasuhiro Yokoshima 175-3, Sasayama, Ishishita-cho, Yuki-gun, Ibaraki Pref. Yokoshimanai (72) Inventor Endo Shigeru 2-12-4 Hanahata, Tsukuba, Ibaraki Pref.

Claims (7)

[Claims] 1. A branch pipe lining material obtained by impregnating an uncured curable resin into a tubular resin adsorbent having a cured flange at one end and an outer surface covered with a highly airtight plastic film, A branch pipe lining material, wherein the inner diameter d1 of the flange portion is smaller than the inner diameter d of the tubular resin adsorbent after curing. 2. A cylindrical portion connected to the tubular resin adsorbent or a plurality of convex portions along the circumference thereof is formed on the flange portion, and the height h of the cylindrical portion or the convex portion is set to 0.5 m / m or more. 2. The branch pipe lining material according to claim 1, wherein the branch pipe lining material is set to 50 m / m. 3. The branch pipe lining material according to claim 2, wherein an outer diameter φ1 of the cylindrical portion or the convex portion of the flange portion is smaller than an inner diameter φ of the branch pipe opening. 4. The lateral pipe lining material according to claim 1, wherein the outer diameter D of the maximum diameter portion of the flange is larger than the internal diameter φ of the lateral pipe opening. 5. The tubular resin adsorbent is covered with the plastic film including a boundary between the outer surface of the tubular resin adsorbent and the flange, and the boundary is airtightly processed. A branch pipe lining material as described in the above. 6. An uncured curable resin is impregnated into a tubular resin adsorbent having a cured flange at one end and an outer surface covered with a highly airtight plastic film to cure the inner diameter d1 of the flange. A branch pipe lining method which is performed using a branch pipe lining material having a diameter smaller than the inner diameter d of the tubular resin adsorbent, wherein a main body portion of the branch pipe lining material excluding a flange portion is a pressure bag. By inserting a flange of the branch pipe lining material into a setting head attached to one end opening of the pressure bag with an elastic body interposed therebetween, thereby forming a branch pipe lining material in the pressure bag. A branch pipe lining unit capable of forming a closed space to be defined is connected to a working robot to move inside the main pipe, and a flange portion of the branch pipe lining material is brought into close contact with a peripheral edge of a branch pipe opening of the main pipe. With the setting head pressed against the main pipe wall, the interposed portion of the elastic body is sealed, and pressurized fluid is supplied to the closed space to place the branch pipe lining material in the branch pipe from the main pipe side. Wherein the curable resin impregnated in the branch pipe lining material is cured while the closed space is pressed to press the branch pipe lining material against the inner wall of the branch pipe. Construction method. 7. An outer circumferential radius R3 of the setting head is set to a circumferential radius R2 of a flange portion of the branch pipe lining material.
R2 and R3 are set to be smaller than the radius R1 of the main pipe, and when the setting head is pressed against the inner wall of the main pipe, a cylindrical portion or its circumference is formed inside the branch pipe in the direction of the branch pipe. 7. The branch pipe according to claim 6, wherein a setting collar having a height h1 is formed to form a plurality of convex portions along the outer circumference, and an outer diameter d2 of the setting collar is set smaller than an inner diameter d1 of the flange. Lining method.