JPH1120020A - 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 to be easily inverted and inserted into a branch pipe having a bent part 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 coupling a branch pipe lining unit 13 to an operating robot 14 to move it in a main tube 10, supplying compressed air from an air hole 7 into a first sealed space S1 in the state that a collar 3 of the material 1 is brought into close contact with a peripheral edge of an opening of the branch of the tube 10 to invert to insert a start liner 6 from the tube 10 side into the branch pipe 11 toward the ground, towing a towing rope or belt 9 while the space S1 is being pressurized as it is to reversibly invert the lining 1 from its end side to retract it into the liner 6, and pressurizing a second sealing space S2 to cure curable resin impregnated to the material 1 while the material 1 is being pressed to an inner periphery 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. Regarding the lining of the branch pipe, for example, a reversing unit including a flexible liner tube and a pressure bag accommodating the same is introduced into the main pipe, and the reversing unit is moved in the main pipe to open the reversing outlet of the liner tube into the branch pipe opening. A method has been proposed in which the liner tube is inverted and inserted into the branch pipe by fluid pressure after being positioned at the portion, and the curable resin impregnated in the liner tube is cured to line the branch pipe (US Pat. 434, 115).

[0004]

The branch pipe lining material for lining the branch pipe requires a plate thickness of a predetermined value or more in order to secure the necessary strength.

However, when the branch pipe lining material is reversely inserted into the branch pipe by fluid pressure, a higher reversing pressure is required as the thickness of the branch pipe lining material increases, making it difficult to perform the reversing operation. In particular, the branch pipe lining material requires a high reversing pressure when passing through the bent part of the branch pipe, and the deteriorated branch pipe is damaged by the high reversing pressure, or the branch pipe lining material is formed as soon as the branch pipe lining material passes the bent part. However, there was a problem that the ball turned over and jumped to the ground. Further, it has been extremely difficult to insert the pipe lining material into the branch pipe having a plurality of bent portions by inversion.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a branch pipe lining material that can be easily invertedly inserted into a branch pipe having a bent portion, and a branch pipe lining method using the same. Is to provide.

[0007]

In order to achieve the above object, the invention according to claim 1 has a hardened flange at one end, the outer surface of which is covered with a highly airtight plastic film, and which has not been hardened. A highly airtight tube is inserted into the inside of a tubular resin adsorbent formed by impregnating a curable resin, and a highly airtight start liner having a sealed end is inserted into the inside of the tube. Each end of the liner is air-tightly fixed to the flange, and the first end space of the tubular resin adsorbent and the tube is sealed to form a first sealed space defined by a tube and a start liner inside. Then, a hose for supplying a pressurized fluid to the first closed space is made to face the first closed space from the tubular resin adsorbent and the end of the tube, and the hose and the starter Characterized in that to constitute a branch pipe liner bag by connecting the end portion of the toner in the tow rope or belt.

According to a second aspect of the present invention, there is provided a branch pipe lining method constructed by using the branch pipe lining material according to the first aspect, wherein a main body portion of the branch pipe lining material except for a flange portion is provided inside the pressure bag. And a second closed space defined by the branch pipe lining material in the pressure bag by bringing the flange of the branch pipe lining material into close contact with a setting head attached to one end opening of the pressure bag. The branch pipe lining unit formed by connecting the branch pipe lining unit to a working robot and moving the inside of the main pipe, and the hose from the hose in a state where 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. A pressurized fluid is supplied to the first enclosed space, and the start liner is inserted into the branch pipe in a reverse direction from the main pipe side toward the ground, and the traction rope or belt is pressed while the first enclosed space is pressurized. By pulling, the branch pipe lining is reversely inverted from its end portion side and pulled into the start liner, and the second closed space is pressurized to keep the branch pipe lining material pressed against the inner peripheral surface of the branch pipe. The curable resin impregnated in the branch pipe lining material is cured.

According to a third aspect of the present invention, there is provided a branch pipe lining method constructed by using the branch pipe lining material according to the first aspect, wherein a main body portion of the branch pipe lining material excluding a flange portion is placed in a pressure bag. A second closed space defined by the branch pipe lining material in the pressure bag by inserting the flange portion of the branch pipe lining material into close contact with a setting head attached to one end opening of the pressure bag. The branch pipe lining unit thus formed is connected to a working robot to move in the main pipe, and the hose is connected to the main pipe in a state where 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. A pressure fluid is supplied to the first sealed space, and the start liner is inserted into the branch pipe in a reverse direction from the main pipe side toward the ground, and a pressure flow is supplied to the second sealed space while the first sealed space is pressurized. And the towing rope or belt is towed to insert the branch pipe lining material in the start liner upside down from the main pipe side toward the ground, and pressurize the second enclosed space to branch the pipe lining material. The curable resin impregnated in the branch pipe lining material is cured while pressing against the inner peripheral surface of the branch pipe.

Therefore, according to the branch pipe lining method according to claim 2 or 3, which is constructed using the branch pipe lining material according to claim 1, first, even if there is a bend due to being thin and flexible, it is inverted. By inserting a start liner which is easy to be inserted into the branch pipe by fluid pressure, a tow rope or belt attached to the end of the start liner is passed through the branch pipe (start liner) from the main pipe side toward the ground, By pulling this tow rope or belt, the branch pipe lining material is drawn into the branch pipe (start liner),
At the bent portion of the branch pipe, the insertion direction of the branch pipe lining material can be corrected by a pulling rope or a belt so that the branch pipe lining material can easily pass through the bent portion, so that a high reversing pressure is unnecessary unlike the conventional case. Thus, even if the branch pipe lining material is thick, it can be easily inverted and inserted into the branch pipe having the bent portion.

[0011]

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

FIG. 1 is a cross-sectional view of a lateral pipe lining material 1 according to the present invention.
It is configured to include a tubular resin adsorbent 2 made of a nonwoven fabric of m to 6.0 m / m, and has a flange-shaped flange 3 which is folded outward at one end. 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. High plastic film 4 is coated. 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.
As the uncured thermosetting resin impregnated in these, unsaturated polyester resin, epoxy resin and the like are used.
The material of the plastic film 4 is selected from polyurethane, polyethylene, polyethylene / nylon copolymer, vinyl chloride and the like.

By the way, the flange 3 is connected to a main pipe 10 to be described later.
(See FIG. 2), the curved surface is curved in an arc shape with the same curvature as the inner peripheral surface, and the outer diameter thereof is set to be larger than the inner diameter of a branch pipe 11 (see FIG. 2) described later. When the curable resin impregnated in the resin is cured, the flange 3 retains its shape. One end of a highly airtight tube 5 and one end of a start liner 6 are cut open and adhered to the upper surface of the flange portion 3. The tube 5 is inserted into the tubular resin adsorbent 2, and the tube 5 has The start liner 6 is inserted, and the end of the start liner 6 is sealed as shown in the figure. The same material as that of the plastic film 4 is used as the material of the tube 5, and the start liner 6 is formed by covering the outer surface of a tubular nonwoven fabric or a tubular woven fabric with a plastic film.
A plastic tube in which a tubular nonwoven fabric is inserted or a plastic tube itself is used.
It is set to 2 m / m to 2.0 m / m.

An air hose 7 is inserted into the end of the tubular resin adsorbent 2 and the end of the tube 5, and the outer periphery of the end of the tubular resin adsorbent 2 and the end of the tube 5 is fastened by a fastening belt 8. And sealed.

[0015] In the inside of the branch pipe lining material 1, a first liner defined by the tube 5 and the start liner 6 is provided.
A closed space S1 is formed, and one end of the air hose 7 is opened in the first closed space S1. And the end of the start liner 6 and the air hose 7
Is connected by a tow rope or belt 9. The other end of the air hose 7 is connected to a compressor (not shown).

In the branch pipe lining material 1, a peeling tube 12 having a predetermined length is provided outside the tubular resin adsorbing material 2.
One end of the peeling tube 12 is peelably adhered to the outer periphery of the tubular resin adsorbent 2 (plastic film 4) near the flange 3, and the other end is open. The material of the peeling tube 12 is the same as the material of the plastic tube 4.

Next, a branch pipe lining method constructed using the branch pipe lining material 1 configured as described above will be described.

<First Embodiment> FIGS. 2 to 6 are sectional views showing a branch pipe lining method according to a first embodiment of the present invention in the order of steps. In the drawings, reference numeral 10 denotes a main pipe such as a sewer pipe; 11
Is a small-diameter branch pipe that merges with the main pipe 10.

In the branch pipe lining method according to the present embodiment, as shown in FIG. 2, the branch pipe lining unit 13 including the branch pipe lining material 1 is connected to the working robot 14. It is movably introduced into the main pipe 10.

Here, the branch pipe lining unit 13
Inserts the main body portion of the branch pipe lining material 1 excluding the flange 3 into the pressure bag 15 and
Is tightly attached to a setting head 16 attached to one end opening of the pressure bag 15 to form a second closed space S2 defined by the branch pipe lining material 1 in the pressure bag 15. I have.

The pressure bag 15 is connected and integrated in the middle by a joint collar 17, and the open end of the peeling tube 12 of the branch pipe lining material 1 is connected to the joint collar 17. The air hose 7 is inserted through an end collar 18 connected to an end portion of the pressure bag 15, and the inserted portion is hermetically sealed by an O-ring 19. Further, another air hose 20 is connected to the end collar 18, and one end of the air hose 20 opens to the second closed space S2 in the pressure bag 15, and the other end of the air hose 20 is connected to the ground. It is connected to the installed compressor (not shown).

The working robot 14 is driven by hydraulic pressure so that its head 14a moves up and down in the directions of arrows a and b in FIG. 2 and rotates in the direction of arrow c. The branch pipe lining unit 13
The setting head 16 is detachably mounted. A monitor TV camera 21 is provided above the work robot 14.

In the above description, the working robot 14 and the branch pipe lining unit 13 supported by the working robot 14 can be moved integrally in the main pipe 10, while the TV camera 21 monitors the inside of the main pipe 10 on the ground. , FIG. 2
As shown in the figure, the flange 3 of the branch pipe lining material 1 is connected to the branch pipe 11.
Of the head 1 of the working robot 14
4a, the flange 3 of the branch pipe lining material 1 is moved to the periphery of the branch pipe opening of the main pipe 10 (the part where the branch pipe 11 opens in the main pipe 10) as shown in FIG. And press it tightly.

Next, when a compressor (not shown) installed on the ground is driven to supply compressed air from the air hose 7 into the first closed space S1 in the branch pipe lining material 1, a thin and flexible start is achieved. The liner 6 is sequentially inserted from the main pipe 10 toward the ground side (upward) through the branch pipe 11 while being inverted under the pressure of the compressed air, and accordingly, the traction connected to the end of the start liner 6. The rope or belt 9 is pulled by the start liner 6 and the branch pipe 11
(Start liner 6). Even if there is a bent portion in the branch pipe 11, the start liner 6 is thinner than the thickness of the tubular resin adsorbing material 2 of the branch pipe lining material 1 as described above, so that the branch pipe 11 can be formed even by compressed air having a low pressure. It is easily inverted inside.

When the inverted insertion of the start liner 6 into the branch pipe 11 is completed as described above, as shown in FIG. 4, the traction rope or belt 9 connected to the end of the start liner 6 is connected to the branch pipe 11. The starter liner 6 is inserted into the (start liner 6). The opening at the upper end of the start liner 6 is closed by the sealing collar 22, and the tow rope or belt 9 extends outside through the sealing collar 22.
The portion of the sealing collar 22 through which the tow rope or the belt 9 is inserted is hermetically sealed by an O-ring 23. The sealing collar 22 has an air hose 25 connected to a compressor 24 and an air hose 2 for air purging.
6 and a pressure gauge 27 are connected.
Valves 28 and 29 are provided in the middle of 5 and 26, respectively.

Thus, the one valve 29 is closed and the other valve 28 is opened to drive the compressor 24 and supply compressed air from the air hose 25 into the start liner 6 to connect the start liner 6 to the branch pipe 11. While being pressed against the inner wall, the towing rope or belt 9 is pulled upward from the ground. Then, as shown in FIG. 4, the branch pipe lining material 1 is reversed from its end portion side and drawn into the branch pipe 11 from the main pipe 10 side, but passes through the bent portion of the branch pipe 11 on the way. In this case, since the pulling direction is corrected by the pulling rope or the belt 9, the branch pipe lining material 1 can easily pass through the bent portion of the branch pipe 11, and a high reversing pressure as in the related art is unnecessary. Even if the branch pipe lining material 1 has a large thickness, it can be easily drawn into the branch pipe 11 having a bent portion.

As described above, when the branch pipe lining material 1 is drawn into the branch pipe 11 over its entire length as shown in FIG. 5, the compressor (not shown) is driven to compress air from the air hose 20. The branch pipe lining material 1 is supplied to the inner closed space S2 of the pressure bag 15, and the branch pipe lining material 1 is optionally pressed while the branch pipe lining material 1 is pressed against the branch pipe 11 (start liner 6) by the pressure of the compressed air. Heat by means. 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.

As described above, the branch pipe lining material 1
Is hardened, the head 14a of the working robot 14 is moved downward to move the setting head 16 to the branch pipe lining material 1.
Then, the working robot 14, the pressure bag 15, the peeling tube 12, and the like are integrally pulled, for example, to the right in FIG. Then, since the peeling tube 12 is peeled from the inner peripheral surface of the branch pipe lining material 1, the working robot 14, the pressure bag 15, the peeling tube 12 and the like can be integrally removed from the main pipe 10, As shown in FIG. 6, only the hardened branch pipe lining material 1 is left in the branch pipe 11, and a series of lining operations on the branch pipe 11 ends here.

In this embodiment, first, the thin and flexible start liner 6 is first compressed by the air pressure.
1 by pulling it upside down, the tow rope or belt 9 attached to the end of the start liner 6
Is passed through the branch pipe 11 (start liner 6) from the main pipe 10 toward the ground, and the tow rope or belt 9 is pulled to pull the branch pipe lining material 1 into the branch pipe 11 (start liner 6). In the bent portion of the branch pipe 11, the insertion direction of the branch pipe lining material 1 can be corrected by the pulling rope or the belt 9 so that the bent portion of the branch pipe lining material 1 can be easily passed through. No reversing pressure is required, and even a thick branch pipe lining material 1 can be easily reversed and inserted into the branch pipe 11 having a bent portion.

Second Embodiment Next, a branch pipe lining method according to a second embodiment of the present invention will be described with reference to FIGS. 7 and 8 are sectional views showing one step of the branch pipe lining method according to the present embodiment. In these figures, the same elements as those shown in FIGS. 2 to 6 are denoted by the same reference numerals. In the following, a description thereof will be omitted.

In the pipe lining method according to this embodiment, the steps shown in FIGS. 2 and 3 in the first embodiment (from setting the branch pipe lining unit 13 into the main pipe 10 to branching the start liner 6). The process leading to the inverted insertion into the tube 11) is performed in exactly the same manner as in the first embodiment.

In this embodiment, a compressor (not shown) is driven from the state shown in FIG. 7 to supply compressed air from the air hose 20 to the second closed space S2.
Then, the branch pipe lining material 1 is reversely inserted from the main pipe 10 side to the ground in the branch pipe 11 (start liner 6) under the pressure of the compressed air, but as shown in FIG. When passing through the bent portion of the pipe 11, the reverse insertion thereof is corrected by the tow rope or the belt 9, so that the branch pipe lining material 1 can easily pass through the bent portion of the branch pipe 11. Thus, even if the branch pipe lining material 1 has a large thickness, it can be easily drawn into the branch pipe 11 having a bent portion.

When the branch pipe lining material 1 is inserted upside down into the branch pipe 11 (start liner 6) as described above,
Thereafter, the lining of the branch pipe 11 is performed through the same steps as in the first embodiment (see FIGS. 5 and 6), but the same effects as in the first embodiment can be obtained in this embodiment.

[0034]

As is apparent from the above description, claim 1
According to the branch pipe lining method according to claim 2 or 3, which is constructed using the branch pipe lining material described above, first, the start liner that is thin and flexible and easily reverses even if bent is formed by fluid pressure. The tow rope or belt attached to the end portion of the start liner is passed through the branch pipe (start liner) from the main pipe side to the ground by inverting insertion into the branch pipe, and the tow rope or belt is pulled. The branch pipe lining material is drawn into the branch pipe (start liner), and at the bent part of the branch pipe, the reverse insertion direction of the branch pipe lining material is corrected by a traction rope or a belt, so that the bent part is easily formed in the branch pipe lining material. Can be passed through the pipe, so that a high reversing pressure is unnecessary as in the past, and even if the branch pipe lining material is thick, it can be bent. Effect that can be easily reversed inserted into branch vessel having.

[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 lateral pipe lining method according to Embodiment 1 of the present invention.

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

FIG. 4 is a sectional view showing a lateral pipe lining method according to Embodiment 1 of the present invention.

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Branch pipe lining material 2 Tubular resin adsorbent 3 Flange part 4 Plastic film 5 Tube 6 Start liner 7 Air hose (hose) 9 Tow rope or belt 10 Main pipe 11 Branch pipe 13 Branch pipe lining unit 14 Work robot 15 Pressure bag 16 Setting head 20 Air hose (hose) S1 First enclosed space S2 Second enclosed space

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

Claims (3)

[Claims] 1. A tubular resin adsorbent having a cured flange at one end and an outer surface covered with a highly airtight plastic film, and impregnated with an uncured curable resin. A tube is inserted, a highly air-tight start liner having an end portion sealed therein is inserted into the inside of the tube, and one end of each of the tube and the start liner is air-tightly fixed to the flange portion. A first sealed space defined by a tube and a start liner is formed therein by sealing each end portion of the adsorbent and the tube, and a hose for supplying a pressure fluid to the first sealed space is connected to the tubular resin. The hose and the end of the start liner are connected to each other by a tow rope or a belt, with the adsorbent and the end of the tube facing the first closed space. A branch pipe lining material characterized by the following. 2. A tubular resin adsorbent, which has a cured flange at one end and whose outer surface is covered with a highly airtight plastic film and is impregnated with an uncured curable resin, has a highly airtight interior. A tube is inserted, a highly air-tight start liner having an end portion sealed therein is inserted into the inside of the tube, and one end of each of the tube and the start liner is air-tightly fixed to the flange portion. A first sealed space defined by the tube and the start liner is formed therein by sealing the end portions of the adsorbent and the tube, and a hose for supplying a pressure fluid to the first sealed space is formed in the tubular shape. A branch formed by allowing the resin adsorbent and the end of the tube to face the first sealed space, and connecting the hose and the end of the start liner with a tow rope or belt. A branch pipe lining method constructed by using a pipe lining material, wherein a main body portion of the branch pipe lining material except for a flange portion is inserted into a pressure bag, and a flange portion of the branch pipe lining material is attached to the pressure bag. A branch pipe lining unit, which forms a second sealed space defined by a branch pipe lining material in the pressure bag by being brought into close contact with a setting head attached to one end opening, is connected to a working robot. By moving the inside of the main pipe, a pressure fluid is supplied from the hose to the first closed space with the flange of the branch pipe lining material being in close contact with the periphery of the branch pipe opening of the main pipe, and the start liner is branched. The branch pipe lining is inserted into the pipe by turning it upside down from the main pipe side toward the ground and pulling the pulling rope or belt while pressurizing the first enclosed space. The second closed space is pressurized by inverting the branch pipe side into the start liner, and the hardening impregnated in the branch pipe lining material while pressing the branch pipe lining material against the inner peripheral surface of the branch pipe is performed. Branch pipe lining method characterized by curing a conductive resin. 3. A highly airtight inside of a tubular resin adsorbent, which has a cured flange at one end and whose outer surface is covered with a highly airtight plastic film and is impregnated with an uncured curable resin. A tube is inserted, a highly air-tight start liner having an end portion sealed therein is inserted into the inside of the tube, and one end of each of the tube and the start liner is air-tightly fixed to the flange portion. A first sealed space defined by the tube and the start liner is formed therein by sealing the end portions of the adsorbent and the tube, and a hose for supplying a pressure fluid to the first sealed space is formed in the tubular shape. A branch formed by allowing the resin adsorbent and the end of the tube to face the first sealed space, and connecting the hose and the end of the start liner with a tow rope or belt. A branch pipe lining method constructed by using a pipe lining material, wherein a main body portion of the branch pipe lining material except for a flange portion is inserted into a pressure bag, and a flange portion of the branch pipe lining material is attached to the pressure bag. A branch pipe lining unit, which forms a second sealed space defined by a branch pipe lining material in the pressure bag by being brought into close contact with a setting head attached to one end opening, is connected to a working robot. By moving the inside of the main pipe, a pressure fluid is supplied from the hose to the first closed space with the flange of the branch pipe lining material being in close contact with the periphery of the branch pipe opening of the main pipe, and the start liner is branched. Invert the pipe from the main pipe side toward the ground in the pipe, supply the pressurized fluid to the second sealed space while pressurizing the first sealed space, and attach the tow rope or belt to the second sealed space. By pulling the branch pipe lining material, the main pipe side is inverted and inserted into the start liner from the main pipe side toward the ground, and the second closed space is pressurized to press the branch pipe lining material against the inner peripheral surface of the branch pipe. A branch pipe lining method, wherein the curable resin impregnated in the branch pipe lining material is cured as it is.