JPH09262904A - Repairing method for branched pipe and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and rapidly effect repairing of a branched pipe superior in accuracy and to prevent a leakage of a fluid pressure at a time of inversion of a lining further to obtain economically. SOLUTION: An inversion device is sent forward to a branch pipe 12 for repairing in a ground main pipe 1 by using this inversion device 8 holding a cylindrical lining 7 with flange. The inversion device 8 is moved in an axial direction of the main pipe so that an ejection port 11 from which the cylindrical lining 7 in the inversion device is ejected by inversion is corresponding to an exit 13 of this branch pipe. Then, the inversion device 8 is positioned by rotating in a circumferential direction of the main pipe and a cylindrical movable fluid chamber body 16 having a hollow part mounted in an outer periphery of the inversion device 8 is swelled and a flange part 51 of this cylindrical lining is pressed and adhered to the exit rim part 53 of the main pipe. In keeping this adhered state, this cylindrical lining 7 is inverted to pressurize at an inner periphery of the branch pipe 12 to be tensioned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for repairing a branch pipe buried underground.

[0002]

2. Description of the Related Art As a method for repairing a branch pipe buried underground, there is known a method in which a tubular lining material is lined with the branch pipe while being turned over by fluid pressure. The lining material is made by impregnating a thermosetting resin into a resin absorbing material such as a nonwoven fabric whose outer peripheral surface is covered with an airtight film. The thermosetting resin contained in the lining material is heated and cured in the pressed state.

At this time, in order to insert the lining material from the main pipe into the branch pipe and invert it, the position of the lining material must be adjusted so that the lining material can be set in the branch pipe. As this method, for example, JP-A-4-355
No. 115 and Japanese Examined Patent Publication No. 7-121552, these are operated by operating the arm (setting arm) provided on the robot (setting robot) installed inside the main while watching the TV camera with the above lining material. Since the adjustment is made by adjusting the position of the branch pipe, the setting of the position on the branch pipe is delicate, and it takes time to perform the work and requires considerable skill. These also use a peeling tube to maintain the airtightness of the pressure bag and the branch pipe lining material, connect the pressure bag and the setting robot with a guide tube, and between the collar of the lining material and the setting arm. Since an air mat is provided and beads are provided on the brim portion of the lining material, the structure is complicated and the work is troublesome and the cost is high. Further, after the peeling tube is peeled off, it remains in the tube, which causes clogging of the tube.

[0004]

SUMMARY OF THE INVENTION The present invention solves these problems, and repairs a branch pipe easily and quickly without using a conventional peeling tube, guide tube, air mat, or beads. In addition to the above, it is possible to prevent the leakage of the fluid pressure at the time of reversing the lining material with high accuracy, and to obtain more economically.

[0005]

The present invention uses a reversing device for accommodating a tubular lining material with a collar, and sends the reversing device to the branch pipe to be repaired in the underground main pipe. Of the tubular lining material of the main pipe is reversed so that the outlet of the main pipe can be taken out from the branch pipe so as to correspond to the outlet of the branch pipe. The cylindrical deformable fluid chamber body having the hollow portion provided on the outer periphery of the tubular lining material is bulged and pressed against the brim portion of the tubular lining material against the outlet peripheral edge portion of the branch pipe to make a close contact. The tubular lining material is inverted while being held and pressed against the inner peripheral surface of the branch pipe to be stretched, and a supporting pipe for mounting the tubular lining material with a collar is provided when positioning the supporting pipe. An operating system with the main body and operating shaft inside the pipe. A working cylinder, the working cylinder relatively reciprocates and rotates by the working cylinder, the setting cylinder fixed to the working shaft is fixed to the inner peripheral surface of the main pipe, and a fluid pressure is applied to the working cylinder. The support pipe supporting the main body of the working cylinder is reciprocated and rotated so that the outlet of the tubular lining material of the support pipe corresponds to the outlet of the branch pipe.

[0006]

1 to 4 show a procedure for repairing a branch pipe. In FIG. 1, a winch (2), (3) is used in the main pipe (1), and a collar provided with a self-propelled television camera (5) and a pressure tube (6) at the rear by an index rope (4). The reversing device (8) for reversing the attached tubular lining material (7) is pulled in. The TV camera (5) in the main pipe and the TV camera (10) provided in the branch pipe are connected to a monitor installed in the robotic vehicle for operation (9), and the video projected on the monitor via this TV camera is transmitted. The position is set so that the outlet (11) of the tubular lining material of the reversing device substantially corresponds to the outlet (13) of the branch pipe (12) while watching. In addition, the television camera (10) in the branch pipe is connected to a monitor in the operation vehicle via the camera device (14).

The reversing device (8) is provided with a support tube (15) as shown in FIG. A cylindrical deformable fluid chamber tube (16) having a hollow portion is provided on the outer peripheral portion of the support tube.

A working cylinder (17) is provided in the support pipe (15) of the reversing device (8), and a main body of the working cylinder is provided.
(18) is supported by support plates (20) provided on both end plates (19) and fixed to the inner peripheral surface of the support pipe (15). In this case, screw the support plate (20) to the support tube (15) as shown in FIG.
1) Stop and pass the hexagon socket head bolt (23) through the hole (22) formed in the support plate, and fix the end plate (19) of the working cylinder to the support plate (20) with the hexagon socket head bolt. There is. At that time, a notch (24) is provided in the support plate (20), and a hose (25) for exerting a fluid pressure is passed through this space.

As shown in FIG. 9, the working cylinder (17) includes a reciprocating working shaft (27) having a screw thread portion (26),
A rotating piston (28) threadably engaged with the screw thread portion.
And a reciprocating piston (29) that reciprocates together with the operating shaft and is rotatably supported.The inner peripheral surface (30) of the body (18) and the pistons (28) The outer peripheral surfaces (31) and (32) of () and (29) have elliptical cross sections.

The operating state of the operating cylinder (17) is shown in FIGS.
As shown in FIG. First, in FIG. 11, port A (33)
Then, when a fluid such as air or oil is inserted from the port B (34) and the fluid is discharged from the port C (35), as shown in FIG. 12, the rotating piston (28) and the reciprocating piston (29 ) Is pressed to fix the operating shaft (27), the main body (18) moves in the axial direction.

At this position, port A (33) and port C (35)
When more fluid is inserted and fluid is discharged from port B (34), the rotating piston (28) moves axially while rotating with respect to the working shaft, and the reciprocating piston (29) moves relative to the working shaft. The operating shaft (27) and the main body (18) rotate relative to each other (FIG. 13). In this case, the operating shaft (27) is fixed and the main body (18) is rotated, but for convenience of explanation, the main body (18), the rotating piston (28), the reciprocating piston (29), etc. Is not rotated.

In the state of FIG. 13, port B (34) and port C
When fluid is inserted into (35) and is discharged from port A (33), when the operating shaft (27) is fixed, the rotating piston (2
8) and the reciprocating piston (29) are pushed, and the main body (18) moves in the axial direction (Fig. 14).

In this way, when the working shaft (27) is fixed by inserting and discharging the fluid in each port, the main body
(18) can be moved or rotated in the axial direction.

A setting cylinder (36) is fixed to the outer end of the working shaft (27) of the working cylinder (17). The setting cylinder has an operating shaft (27) as shown in FIG.
It has a manifold (37) fixed to the manifold and three supports (38) attached to the manifold.

As shown in FIG. 8, the support member (38) has an outer cylindrical portion (3
9), a piston rod (66) containing a spring (40),
A pusher (41) fitted to the upper part of the piston rod is provided. Fluid pressure passageway (42) formed in the manifold (37)
When a fluid is sent from the inlet (43) of the spring, the fluid enters the piston rod (66) from the inlet (44) of each support (38), and the spring (45) supported by the spring retainers (45) ( The piston rod (66) is pushed up against 40), and the pusher (41) becomes the main pipe (1).
Press the inner peripheral surface of. As a result, the setting cylinder (36) is fixed to the main pipe (1). The movement of the piston rod (66) is restricted by a stopper (47), and the piston rod (66) and the pusher (41) are fixed by a hexagon socket head cap bolt (48).

In this way, the setting cylinder (36) is fixed to the main pipe, and the operating shaft (27) of the operating cylinder (17) is
After fixing (Fig. 2), the support pipe (15) to which the main body of the working cylinder is fixed is moved or rotated in the axial direction to remove the tubular lining material (7) from the support pipe ( 11) branch pipe
It can correspond to the exit (13) of (12).

A fluid chamber body (16) which is bulged by a fluid pressure such as air sent by a hose (49) is provided on the outer periphery of the support pipe (15), and an outlet (11) for the support pipe is provided. The flange portion (51) of the tubular lining material (7) is applied to the upper edge of the opening (50) formed corresponding to, and the fluid is introduced into the fluid chamber body from the inlet (52) and expanded. Of the branch pipe (5).
Press strongly against 3) to make it adhere (Fig. 3). Bands (54) are provided on both outer circumferences of the fluid chamber body for reinforcement.

A flange portion (55) is formed in the opening (50) of the fluid chamber body (16), and a guide tube (56) for guiding the tubular lining material (7) is fixed to the flange portion (55). There is. The guide tube has a bellows portion (57) so that it can move in response to the bulging of the fluid chamber body.

A holding tube (59) is provided on the outer periphery of the guide tube (56) for reinforcing and guiding the guide tube (56) and for attaching the pressure tube (58). One end of the holding tube is fixed to the support tube (7), the other end is wrapped with the end of the guide tube (56), and the end of the pressure tube (58) is fitted around the outer periphery of the end of the holding tube (60). It is fixed at. At that time, two rings (61) are provided on the outer circumference of the other end of the holding tube (59) with a space therebetween, and the two rings (61) are positioned between them to be in a hermetically sealed state.

The tubular lining material (7) is accommodated in the pressure tube (58) from the guide tube (56) and is housed in the pressure tube (58).
Flow a fluid such as air or water through the pressure hose (63),
The fluid pressure causes the tubular lining material to be reversed, and the tubular lining material is fed into the branch pipe (12) through the take-out port (11) and brought into close contact with the inner peripheral surface of the branch pipe (FIG. 4). The pressure hose is provided with a pressure gauge (64), a stop valve (65) and the like as appropriate.

After the tubular lining material is brought into close contact with the inner peripheral surface of the branch pipe, the tubular lining material is heated with hot water, hot air, steam or the like to cure the thermosetting resin portion of the tubular lining material, and the tubular lining material is placed in the branch pipe. Line the tubular lining material.

[0022]

As described above, the present invention uses the working cylinder and the setting cylinder to axially move or rotate the reversing device installed in the main pipe so that the outlet of the cylindrical lining material is removed from the branch pipe. The position of the outlet of the tubular lining material and that of the outlet of the branch pipe can be matched quickly and accurately with certainty, and there is no leakage of fluid pressure. The whole is simplified and can be made economically.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the present invention and showing a state in which a reversing device is installed in a main pipe.

FIG. 2 is a schematic explanatory view showing a case where a setting cylinder acts to fix an operation shaft of an operation cylinder in a reversing device and position the reversing device.

FIG. 3 is a schematic explanatory view showing a state where a fluid chamber body of the reversing device is expanded.

FIG. 4 is a schematic explanatory view showing a state in which a tubular lining material is inverted by a reversing device and inserted into a branch pipe.

FIG. 5 is an enlarged cross-sectional view of a reversing device.

FIG. 6 is an enlarged side sectional view showing a mounting state of the working cylinder.

FIG. 7 is an enlarged side view of the setting cylinder.

FIG. 8 is an enlarged cross-sectional view of a support of the setting cylinder.

FIG. 9 is an enlarged sectional view of a working cylinder.

FIG. 10 is an enlarged side view of the working cylinder.

11 is a schematic cross-sectional view illustrating a case where the working cylinder changes from the state of FIG. 11 to the state of FIG. 12.

FIG. 12 is a schematic cross-sectional view illustrating a case where the working cylinder changes from the state of FIG. 12 to the state of FIG. 13.

13 is a schematic cross-sectional view illustrating a case where the working cylinder changes from the state of FIG. 13 to the state of FIG. 14.

FIG. 14 is a schematic cross-sectional view illustrating a case where the working cylinder changes from the state of FIG. 13 to the state of FIG.

[Explanation of symbols]

 1 main pipe 5,10 TV camera 6 pressure tube 7 tubular lining material with flange 8 reversing device 11 outlet 12 branch pipe 15 support pipe 16 fluid chamber pipe 17 working cylinder 18 body 27 working shaft 28 rotating piston 29 reciprocating piston 36 Setting cylinder 38 Support 51 Collar 56 Guide tube 57 Bellows 59 Holding tube

Claims (3)

[Claims] 1. A reversing device for accommodating a tubular lining material with a collar, wherein a resin absorbent material such as a non-woven fabric coated with an airtight film is impregnated with a thermosetting resin and is reversed by fluid pressure such as air pressure, A television installed in the pipe so that the reversing device is sent to the branch pipe to be repaired in the underground main pipe, and the tubular lining material in the reversing device is reversed and taken out to correspond to the outlet of the branch pipe. A cylinder having a hollow portion provided on the outer periphery of the reversing device, while moving the reversing device in the axial direction of the main pipe while rotating while positioning the reversing device while watching the image displayed on the monitor via the camera. -Shaped deformable fluid chamber body swells and presses the collar portion of the tubular lining material against the peripheral edge of the outlet of the branch pipe for close contact, and the tubular lining material is inverted while maintaining this close contact. Inner peripheral surface of branch pipe A branch pipe repairing method, characterized in that the branch pipe is pressed and stretched. 2. An outlet for reversing and taking out a tubular lining material with a collar which is impregnated with a thermosetting resin in a resin absorbent material such as a non-woven fabric coated with an airtight film and is reversed by fluid pressure such as air pressure. A support tube having a hollow portion on the outer periphery of which a hollow portion is bulged by fluid pressure so that the collar portion of the tubular lining material is pressed against the peripheral edge portion of the outlet of the branch pipe to be in a tight contact state. An actuating cylinder having a deformable fluid chamber body and having a main body fixed to the support tube and an actuating shaft reciprocating and rotating relative to the main body by actuation of fluid pressure is provided in the support tube, A setting cylinder having a support is fixed to the outer end of the operating shaft, and the support of the setting cylinder is stretched on the inner peripheral surface of the main pipe by fluid pressure,
The support tube is reciprocated and rotated by reciprocating and rotating the main body of the working cylinder while watching the image projected on the monitor via the TV camera installed in the tube while being fixed to the inner peripheral surface, A branch pipe repair device in which the outlet is positioned so as to correspond to the outlet of the branch pipe. 3. A guide tube having a bellows portion is provided at an opening edge portion of a fluid chamber body extending to an outlet of the support tube, and a pressure tube is fixed to the guide tube. The branch pipe repair device according to claim 2, wherein the tubular lining material is housed in a sealed state.