JPH11207820A - Branch pipe lining material and branch pipe lining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch pipe lining material capable of certainly executing required branch pipe lining by efficiently curing the branch pipe lining material without generating the peeling of a peeling end. SOLUTION: In a branch pipe lining material 1 constituted so that a tubular resin adsorbing material 2 coated with a plastic film 4 of which the outer surface has high airtightness is impregnated with a thermosetting resin and a flange 3 is formed to one end thereof and the outer periphery of the other end thereof is covered with the other end opening part of a peeling end 5 of which one end is sealed to attach the peeling end 5 in a peelable manner, the opening part end edge of the peeling end 5 is obliquely cut and this part is airtightly fused to the plastic film 4 wherein the outer surface of the tubular resin adsorbing material is coated with a bonding film 6 having tensile strength less than that of the peeling end 5.

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 used for lining a branch pipe that joins a main pipe, and a branch pipe lining method using the same.

[0002]

2. Description of the Related Art When a branch pipe buried in the ground is deteriorated, a branch pipe lining for lining the inner peripheral surface of the branch pipe without repairing the branch pipe without excavating the branch pipe from the ground. The construction method is known.

[0003] That is, the branch pipe lining method described above includes a branch pipe lining material in which a curable resin is impregnated into a flexible tubular resin adsorbent whose outer peripheral surface is covered with a highly airtight film. With the flange formed at one end of the branch pipe lining material brought into close contact with the periphery of the branch pipe opening of the main pipe, the branch pipe lining material is placed into the branch pipe by the fluid pressure from the main pipe side to the ground. In this method, the curable resin impregnated in the branch pipe lining material is cured while the branch pipe lining material is in close contact with the inner wall of the branch pipe, and the inner peripheral surface of the branch pipe is lined.

However, depending on the situation on the ground, the lining cannot be formed over the entire length of the branch pipe, and the branch pipe must be partially lined only a predetermined length from the main pipe in some cases. .

Therefore, the present inventors have previously proposed a branch pipe lining material for partially lining a branch pipe and a branch pipe lining method using the same.

[0006] Branch pipe lining material 101 according to the above proposal
As shown in FIG. 11, a peeling end 105 is attached to the other end of the tubular resin adsorbent 102 having a flange 103 formed at one end.
The branch pipe lining material 101 is constructed such that the flange 103 is opened by the work robot 109 at the branch pipe opening of the main pipe 130 (portion where the branch pipe 131 opens in the main pipe 130) as shown in the figure. And pressed against the peripheral wall of

Next, the compressor 119 is driven to supply compressed air to the sealed space S in the pressure bag 110 via the hose 107, and the main pipe is inserted into the branch pipe 131 while the branch pipe lining material 101 is inverted by air pressure. Insert them sequentially from 130 toward the ground side (upward).

Here, the length of the tubular resin adsorbent 102 of the branch pipe lining material 101 is set shorter than the length of the branch pipe 131, and as shown in FIG.
01 is inserted into the branch pipe 131, the tubular resin adsorbent 102 of the branch pipe lining material 101 is removed from the branch pipe 13.
1 (part of a predetermined length from the main pipe 130). In this state, if the hot water pump 133 is driven to supply hot water into the closed space S through the hot water hose 134 and the hose 107, the compressed air in the closed space S is released into the atmosphere through the air release hose 135, while ,
The branch pipe lining material 101 is heated while being pressed against the inner peripheral wall of the branch pipe 131, and the thermosetting resin impregnated in the tubular resin adsorbent 102 is cured.

Thereafter, hot water is drained from the closed space S, and FIG.
As shown in FIG. 3, the head 109 of the working robot 109
Then, the set nozzle 113 is pulled away from the flange 103 of the branch pipe lining material 101 by lowering a, and then the air release hose 135 and the like are pulled in the direction of the arrow shown in the drawing (to the left in FIG. 13) to peel off the end 105 of the tubular resin. When peeled from the material 102, the cured tubular resin adsorbent 102 remains in the branch pipe, and the inner peripheral surface of the branch pipe 131 is partially lined and repaired by the tubular resin adsorbent 102.

[0010]

However, many of the actual branch pipes have a bent portion, and the branch pipe lining material passes through the bent portion by about 5 to 5 mm when passing through a flat portion. Requires ten times as much reversal pressure. for that reason,
If highly compressible air is used for reversing the branch pipe lining material as before, the air will expand even if the air pressure set to high pressure reduces the air pressure immediately after the branch pipe lining material passes the bend. The pressure required at the peeling end that functions as a stopper for reversing the branch pipe lining material that has passed through the bent part rapidly (the pressure required to keep the branch pipe lining material in close contact with the branch pipe inner wall during curing)
There was a problem that the peeling end was peeled off due to the action of the high pressure.

In view of this, it has been proposed to use water having low compressibility for inverting the branch pipe lining material. In this case, if hot water or steam is used as a heat medium used for hardening the branch pipe lining material, the branch is not used. The low-temperature water used for reversing the pipe lining material (high-temperature water cannot be used for reversal) and the heat medium are not stirred, and the low-temperature water and the heat medium are not replaced well. Is formed and the heat medium is also removed, so that the branch pipe lining material is not efficiently heated, and the branch pipe lining material is insufficiently hardened.

It is also conceivable to supply the heat medium to the closed space after completely removing the low-temperature water used for inversion from the closed space. However, if the low-temperature water is removed, the pressure in the closed space is reduced. In the case of a sloping branch pipe, there arises a problem that the branch pipe lining material, which has been once invertedly inserted into the branch pipe, slips along the inner wall of the branch pipe.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to efficiently cure a branch pipe lining material without causing peeling of a peeling end, thereby forming a required branch pipe lining. An object of the present invention is to provide a branch pipe lining material and a branch pipe lining method that can be reliably performed.

[0014]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 impregnates a curable resin into a tubular resin adsorbent whose outer surface is covered with a highly airtight film, and includes one end thereof. In the branch pipe lining material, which is formed by forming a flange on the other end, covering the other end opening of the peeling end whose one end is sealed, and detachably attaching the peeling end. The edge of the opening of the peeling end is cut obliquely, and this portion is hermetically welded to a film coated on the outer surface of the tubular resin adsorbent by a bonding film having a smaller tensile strength than the peeling end. And

According to a second aspect of the present invention, in the first aspect of the present invention, the joining film is formed of a composite film containing nylon (polyamide), polyester and ethylene vinyl alcohol.

According to a third aspect of the present invention, a flange is formed at one end of a tubular resin adsorbent impregnated with a curable resin, and a peeling end is detachably attached to the other end of the tubular resin adsorbent. A portion of the branch pipe lining material other than the flange is introduced into the main pipe in a state of being housed in the pressure bag, and 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 pressure bag is closed. A pressure liquid is supplied into the branch pipe lining material by liquid pressure, and the branch pipe lining material is inserted into the branch pipe in a reverse direction from the main pipe side toward the ground, and a gas hose connected to the peeling end is connected to a pressure bag and a branch pipe lining material. The compressed liquid is extracted from the closed space while supplying compressed gas from the gas hose to the closed space, and gas pressure is applied to the closed space to apply the branch pipe lining material to the closed pipe. Press on inner surface Then, a heating medium is supplied into the closed space to heat the branch pipe lining material with the heating medium, and the curable resin impregnated in the branch pipe lining material is cured, and then the peeling end is peeled off. It is characterized by removing this.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the edge of the opening of the peeling end of the branch pipe lining material is cut obliquely, and this portion has a higher tensile strength than the peeling end. It is characterized in that it is hermetically welded to a film coated on the outer surface of the tubular resin adsorbent with a small bonding film.

According to a fifth aspect of the present invention, in the invention of the third aspect, one end of a liquid hose is attached to the pressure bag, and a vacuum force is applied to the other end of the liquid hose to reverse the branch pipe lining material. The used pressure liquid is withdrawn from the closed space.

According to a sixth aspect of the present invention, in the third aspect of the present invention, the gas hose is hermetically inserted into the pressure bag by a sealing member.

Therefore, according to the branch pipe lining method according to claim 3 or 4, which is carried out using the branch pipe lining material according to claim 1 or 2, the pressure liquid having a small compressibility for inversion of the branch pipe lining material. In order to use, when the branch pipe lining material passes through the bent part of the branch pipe, the pressure of the pressure liquid is increased,
If the pressure of the pressurized liquid is reduced immediately after the branch pipe lining material has passed through the bend, the pressure liquid hardly expands, but expands like a compressed gas to quickly remove the branch pipe lining material that has passed through the bend. There is no inversion. Therefore,
A pressure higher than the pressure required for the peeling end functioning as a reversal stopper (the pressure required for keeping the branch pipe lining material in close contact with the inner wall of the branch pipe during curing) acts to cause the peeling end to become a tubular resin adsorbent. Therefore, bursting of the branch pipe lining material is reliably prevented.
In addition, since the edge of the opening end of the peeling end is cut obliquely, and this portion is joined to the end of the tubular resin adsorbent with a joining film, a large adhesive area is secured, and a necessary and sufficient joining force is obtained, and the curing is performed. The improper pressure that the peeling end comes off forward during the curing of the conductive resin is eliminated, and when peeling off the peeling end, the bonding film is partially peeled off from one end sequentially. Can be easily peeled off with a small tensile force.

According to the fifth aspect of the present invention, since the pressure liquid is evacuated by the vacuum pump and is forcibly discharged to the outside of the closed space, the pressure liquid is efficiently discharged to the outside of the closed space. It can be done in a short time.

According to the sixth aspect of the present invention, since the gas hose is hermetically inserted into the pressure bag by the seal member, the gas hose is hermetically inserted into the closed space by inverting insertion of the branch pipe lining material into the branch pipe. And the compressed gas supplied to the closed space via the gas hose and the pressurized liquid subjected to inversion can be replaced.

[0023]

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

FIG. 1 is a sectional view of a branch pipe lining material according to the present invention, FIG. 2 is an enlarged detailed view of a portion A (reversed end) in FIG. 1, and FIG.
FIG. 2 is a side view of a portion A in FIG. 1.

A branch pipe lining material 1 shown in FIG. 1 includes a tubular resin adsorbing material 2 made of a nonwoven fabric, and one end thereof is folded outward to form a flange-shaped flange 3. An uncured liquid thermosetting resin is impregnated in a portion of the tubular resin adsorbent material 2 excluding the flange 3, and an outer surface of the portion is covered with a highly airtight plastic film 4. 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 an unsaturated polyester resin, an epoxy resin, or the like is used as the thermosetting resin impregnated therein. Can be The material of the plastic film 4 is selected from polyurethane, polyethylene, polyethylene / nylon copolymer, vinyl chloride and the like.

Incidentally, the flange 3 formed at one end of the tubular resin adsorbent 2 has a curved surface which is curved in an arc shape with a curvature equal to that of a main pipe 30 (see FIG. 4) which will be described later. It is set to be larger than the inner diameter of a branch pipe 31 (see FIG. 4) described later, and the hardening resin impregnated therein hardens, so that the flange 3 retains its shape.

At the other end (inverted end) of the tubular resin adsorbent 2, a tubular peeling end 5 is attached so as to be peelable. As shown in detail in FIGS. 2 and 3, one end of the peeling end 5 is sealed, and the other end of the peeling end 5 is fitted around the end of the tubular resin adsorbent 2. The edge is cut diagonally as shown. The diagonally cut opening edge of the peeling end 5 and the plastic film 4 coated on the outer surface of the tubular resin adsorbent 2 are hermetically joined by a joining film 6 welded to both. . A gas hose 7 is attached to the peeling end 5 by a rope 8. Incidentally, the tensile strength of the bonding film 6 is smaller than that of the peeling end 5, and is composed of a composite film containing, for example, nylon (polyamide), polyester and ethylene vinyl alcohol having high heat resistance and welding property. .

Next, a branch pipe lining method according to the present invention constructed using the above-described branch pipe lining material 1 will be described with reference to FIGS. 4 to 8 are sectional views showing the branch pipe lining method according to the present invention in the order of steps, FIG. 9 is an enlarged detailed view of a portion B in FIG. 6, and FIG. 10 is an enlarged detailed view of a portion C in FIG.

In FIG. 4, reference numeral 30 denotes a main pipe such as a sewer pipe,
1 is a small-diameter branch pipe that joins the main pipe 30;
A work robot 9, a pressure bag 10, a branch pipe lining material 1, etc., which are previously assembled and integrated on the ground, are drawn into the inside.

A hydraulic pump 11 installed on the ground is connected to the working robot 9 via two hydraulic hoses 12, and its head 9 a is driven by hydraulic pressure supplied from the hydraulic pump 11. 4 is reciprocable in the directions of arrows a and b and is rotatable in the direction of arrow c, and supports a set nozzle 13 having a flange shape.
In addition, a TV for monitoring is provided above the working robot 9.
A camera 14 is installed. The TV camera 14 is connected to a TV monitor device 15 installed on the ground by an electric cable 1.
6 are electrically connected. A tow rope 17 is attached to the work robot 9, and the tow rope 17 extends to the ground.

On the other hand, one end of the pressure bag 10 is closed by a cap 18, and the other end is attached to the set nozzle 13.

The flange 3 of the branch pipe lining material 1 is set on the set nozzle 13, and the other unreversed portion (the portion excluding the flange 3 of the tubular resin adsorbent 2 and the peeling end 5) Are housed in the pressure bag 10 through the set nozzle 13. At this time, peeling end 5
The gas hose 7 is connected to the gas hose 7 and extends out of the pressure bag 10 through the cap 18. At the end of the gas hose 7, a compressor 19 installed on the ground is attached via a valve 20, and a valve for air purging is provided. 21 is attached. The portion where the gas hose 7 passes through the cap 18 is hermetically sealed by an O-ring 22.

Thus, the cap 1 is placed in the pressure bag 10.
8 and the closed space S defined by the branch pipe lining material 1
The cap 18 is provided with one end of a pressure measuring hose 23 and one end of a liquid hose 24 which are open to the closed space S, and the other end of the pressure measuring hose 23 is provided with a pressure gauge installed on the ground. 25 and a valve 26, and a pump 27 and a vacuum pump 28, which are also installed on the ground, are provided at the other end of the liquid hose 24, respectively.
It is attached via 9, 32.

In the above, the working robot 9 and the branch pipe lining material 1 and the pressure bag supported by the pulling rope 17 or the pressure bag 10 (the gas hose 7, the pressure measuring hose 23 and the liquid hose 24) are pulled. 10 and the like move integrally in the main pipe 30, but the TV
While monitoring the inside of the main pipe 30 with the TV monitor device 15 on the ground by the camera 14, the flange 3 of the branch pipe lining material 1 is positioned at the opening of the branch pipe 31 as shown in FIG. The head 9a is moved upward to press the flange 3 of the branch pipe lining material 1 against the peripheral wall of the branch pipe opening of the main pipe 30 (the part where the branch pipe 31 opens in the main pipe 30) to bring it into close contact. At this time, air is evacuated from the closed space S in the pressure bag 10.

Next, the valve 32 is closed and the valve 29 is closed.
When the pump 27 is driven in a state where the air is opened and the pressurized water is supplied to the closed space S in the pressure bag 10 through the liquid hose 24, as shown in FIG. The main pipe 3 in the branch pipe 31
Inserted sequentially from 0 toward the ground side (upward).

When the branch pipe 31 has a bent portion, a large reversal pressure about 5 to 10 times that of the branch pipe lining material 1 passing through a flat portion is required to pass through the bent portion. It costs. Therefore, the sealed space S
The pressure of the pressurized water is set to a high pressure when the branch pipe lining material 1 passes through the bent portion while monitoring the internal pressure of the branch pipe, and when the branch pipe lining material 1 passes through the bent portion by this high pressure, the valve 29 is opened. The pressure of the pressurized water is reduced to its original low value.

In the present embodiment, since the pressurized water having a small compressibility is used for reversing the branch pipe lining material 1, the pressure water is supplied immediately after the branch pipe lining material 1 passes through the bent portion as described above. When the pressure is reduced, the pressure water hardly expands, and does not rapidly invert the branch pipe lining material 1 which has expanded like compressed air and passed through the bent portion. Therefore, the pressure required for the peeling end 5 functioning as a reversal stopper (the branch pipe lining material 1
Is applied to the inner wall of the branch pipe 31, and the peeling end 5 is not peeled off from the tubular resin adsorbent 2 by the high pressure.
Burst is reliably prevented.

When there is no bent portion in the branch pipe 31, there is no need to bleed air from the closed space S in the pressure bag 10 before the branch pipe lining material 1 is inverted.
Can be used to invert the branch pipe lining material 1 by injecting pressure water while leaving a small amount of air. By doing so, there is an advantage that the work of extracting air before inversion is not required and the amount of pressure water injected into the closed space S can be reduced.

Here, the length of the tubular resin adsorbent 2 of the branch pipe lining material 1 is set shorter than the length of the branch pipe 31, and as shown in FIG. When the inverted insertion into the branch pipe lining material 1 is completed, the tubular resin adsorbent 2 of the branch pipe lining material 1 is partially pressed against the inner peripheral wall of a part of the branch pipe 31 (a predetermined length from the main pipe 31). The peeling end 5 is inverted as shown, and the gas hose 7 connected thereto is drawn into the closed space S. Further, the joining film 6 for joining the peeling end 5 and the tubular resin adsorbent 2 faces the enclosed space (see FIG. 9).

Next, while the valve 21 is closed and the valve 20 is opened, the compressor 19 is driven to supply compressed air into the closed space S through the gas hose 7, and the valve 29 is closed and the valve 32 is closed. In the opened state, the vacuum pump 28 is driven to draw the pressure water (low-temperature water) provided for reversal from the closed space S by the liquid hose 24 and the pressure gauge 25 is monitored to make the internal pressure of the closed space S substantially constant. While maintaining the pressure, the pressurized water in the closed space S is replaced by compressed air. Then, as shown in FIG. 6, the branch pipe lining material 1 is pressed against the inner peripheral wall of the branch pipe 31 by the pressure of the compressed air.

By the way, the pressurized water supplied to the inversion of the branch pipe lining material 1 is discharged from the liquid hose 24 to the outside of the closed space S by the pressure of the compressed air supplied to the closed space S. The pressure of the compressed air cannot be set too high in order to prevent the peeling end 5 attached to the end portion from being peeled off, and it takes a long time to discharge the pressurized water as it is.

However, in the present embodiment, the pressure water is evacuated by the vacuum pump 28 and is forcibly discharged to the outside of the closed space S, so that the pressure water is efficiently discharged to the outside of the closed space S. It can be done in a short time.

If the compressed air in the closed space S is replaced by a heating medium such as hot water or steam while maintaining the above-mentioned state and similarly keeping the internal pressure of the closed space S substantially constant, the branch The pipe lining material 1 is heated and the tubular resin adsorbent 2
The thermosetting resin impregnated in the resin is cured, and the branch pipe 31 is repaired by partially lining the inner peripheral surface thereof by the cured tubular resin adsorbent 2.

Meanwhile, during the curing of the branch pipe lining material 1,
The peeling end 5 is subjected to a pressure for advancing it forward and a pressure for affixing the tubular resin adsorbent 2 to the inner wall of the branch pipe 31. On the other hand, the bonding film is generated by the heat generated by the curing of the thermosetting resin. 6 softens.

Thus, if the peeling end whose opening edge is cut in the direction perpendicular to the axis as in the prior art is simply joined to the tubular resin adsorbent by the joining film, the bonding area is small and the joining force is insufficient. During the curing of the thermosetting resin, there is a problem that the peeling end comes off forward.

However, in the present embodiment, the edge of the opening of the peeling end 5 is cut obliquely as described above, and this portion is joined to the end of the tubular resin adsorbent 2 by the joining film 6, so that a large size is obtained. A necessary and sufficient bonding force can be obtained by securing the bonding area, and there is no occurrence of improper pressure such that the peeling end 5 comes off forward during curing of the thermosetting resin.

When hot water is used as a heat medium in the hardening operation of the branch pipe lining material 1, most of the compressed air in the closed space S passes through the gas hose 7 opened above the closed space S to close the closed space. Since the sealed space S is discharged to the outside and most of the sealed space S is filled with warm water, at least all parts of the branch pipe lining material 1 are surely heated with warm water to remove the thermosetting resin impregnated therein. It can be cured uniformly.

As described above, the branch pipe lining material 1
When the tubular resin adsorbent 2 is hardened, hot water is drained from the closed space S, and as shown in FIG. 7, the head 9a of the working robot 9 is moved downward to move the set nozzle 13 from the flange 3 of the branch pipe lining material 1. After the separation, the gas hose 7, the pressure measuring hose 23, the liquid hose 24 and the like are pulled, for example, to the left in FIG.

Then, the pressure bag 10, the working robot 9, and the peeling end 5 attached to the end of the gas hose 7 are pulled in the same direction, and the peeling end 5 is formed by the joining film 6 of the tubular resin adsorbent 2. It is separated from the tubular resin adsorbent 2 by being peeled off from the plastic film 4 covering the inner peripheral surface.

When a peeling end whose opening edge is cut in the direction perpendicular to the axis as in the prior art is to be peeled off, a large tensile force is required because it is necessary to simultaneously pull the entire bonding film.

However, in the present embodiment, as described above, the edge of the opening of the peeling end 5 is cut obliquely, and this portion is joined to the end of the tubular resin adsorbent 2 by the joining film 6. When peeling off the peeling end 5, the bonding film 6 is partially peeled off from one end sequentially, and the peeling end 5 can be easily peeled off with a small tensile force.

Thus, the gas hose 7, the pressure measuring hose 2
3, liquid hose 24, working robot 9, pressure bag 1
8 and the peeling end 5 move integrally within the main pipe 30 and are removed from the main pipe 30. As shown in FIG. The tubular resin adsorbent 2 is left, and a series of lining operations on the branch pipe 31 is completed here. As shown in detail in FIG. 10, a tubular resin adsorbent 2 whose inner peripheral surface is covered with a plastic film 4 is lined on the inner wall of the branch pipe 31 after the lining is completed.

[0053]

As is apparent from the above description, claim 1
According to the branch pipe lining method according to claim 3 or 4, which is performed using the branch pipe lining material according to claim 2, since a small compressible pressure liquid is used for inversion of the branch pipe lining material, the branch pipe is bent. If the pressure of the pressure liquid is increased when the branch pipe lining material passes through the section and the pressure of the pressure liquid is lowered immediately after the branch pipe lining material passes through the bend, the pressure liquid hardly expands and the compressed gas Thus, the branch pipe lining material that has expanded and passed through the bent portion is not rapidly reversed. Therefore, a pressure higher than the pressure required for the peeling end functioning as a reversal stopper (the pressure required for keeping the branch pipe lining material in close contact with the inner wall of the branch pipe at the time of curing) acts to cause the peeling end to become tubular resin. The adsorbent is not peeled off, and the burst of the branch pipe lining material is reliably prevented. Also, since the edge of the opening end of the peeling end is cut obliquely, and this portion is joined to the end of the tubular resin adsorbent with a joining film, a large adhesive area is secured, and a necessary and sufficient joining force is obtained, The improper pressure that the peeling end is pulled forward during the curing of the curable resin is eliminated, and when peeling off the peeling end, the bonding film is partially peeled sequentially from one end, and the peeling is performed. The effect is obtained that the end can be easily peeled off with a small tensile force.

According to the fifth aspect of the present invention, since the pressure liquid is evacuated by the vacuum pump and is forcibly discharged to the outside of the closed space, the discharge of the pressure liquid to the outside of the closed space is efficiently performed. The effect that it can be performed in a short time is obtained.

According to the sixth aspect of the present invention, since the gas hose is hermetically inserted into the pressure bag by the sealing member, the gas hose is hermetically inserted into the closed space by inverting the branch pipe lining material into the branch pipe. And the compressed gas supplied to the closed space via the gas hose and the pressurized liquid supplied to the inversion can be replaced.

[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 an enlarged detailed view of a portion A (reversed end) in FIG.

FIG. 3 is an enlarged side view of a portion A in FIG. 1;

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

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

FIG. 9 is an enlarged detail view of a portion B in FIG. 6;

FIG. 10 is an enlarged detailed view of a portion C in FIG. 8;

FIG. 11 is a sectional view showing a conventional branch pipe lining method.

FIG. 12 is a sectional view showing a conventional branch pipe lining method.

FIG. 13 is a sectional view showing a conventional branch pipe lining method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Branch pipe lining material 2 Tubular resin adsorbent 3 Flange 4 Plastic film (film) 5 Peeling end 6 Joining film 7 Gas hose 10 Pressure bag 22 O-ring (seal member) 24 Liquid hose 30 Main pipe 31 Branch pipe S Closed space

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29L 23:00

Claims (6)

[Claims] 1. A tubular resin adsorbent, the outer surface of which is covered with a highly airtight film, is impregnated with a curable resin, a flange is formed at one end thereof, and a pull having one end sealed at the outer periphery of the other end. In a branch pipe lining material configured to cover the other end opening of the peeling end and peelably attach the peeling end, an opening edge of the peeling end is cut obliquely, and this portion is peeled. A branch pipe lining material, which is hermetically welded to a film coated on an outer surface of the tubular resin adsorbent by a bonding film having a smaller tensile strength than an end. 2. The branch pipe lining material according to claim 1, wherein the joining film is formed of a composite film containing nylon (polyamide), polyester and ethylene vinyl alcohol. 3. A branch pipe lining material comprising a tubular resin adsorbent impregnated with a curable resin, a flange formed at one end, and a peeling end attached to the other end of the tubular resin adsorbent so as to be peelable. The pressure liquid is supplied into the pressure bag while the parts other than the flange are introduced into the main pipe while being housed in the pressure bag, and 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. Then, the branch pipe lining material is inserted into the branch pipe in a reverse direction from the main pipe side to the ground by liquid pressure, and the gas hose connected to the peeling end is connected to the closed space formed by the pressure bag and the branch pipe lining material. While supplying compressed gas from the gas hose to the closed space, extracting the compressed liquid from the closed space, and applying gas pressure to the closed space to press the branch pipe lining material against the inner peripheral surface of the branch pipe. Leave the closed air A heating medium is supplied into the space to heat the branch pipe lining material with the heating medium, and the curable resin impregnated in the branch pipe lining material is cured, and then the peeling end is peeled off and removed. Branch pipe lining method characterized by the following. 4. An outer edge of the tubular resin adsorbent is cut by cutting an edge of an opening of a peeling end of the branch pipe lining material with a joining film having a smaller tensile strength than the peeling end. The branch pipe lining method according to claim 3, wherein the branch pipe lining method is air-tightly welded to the film. 5. An end of a liquid hose is attached to the pressure bag, and a vacuum force is applied to the other end of the liquid hose so that the pressure liquid used for reversing the branch pipe lining material is removed from the closed space. 4. The method according to claim 3, wherein
The described branch pipe lining method. 6. The branch pipe lining method according to claim 3, wherein the gas hose is hermetically inserted into the pressure bag by a sealing member.