JP2002061786A - Guide tool for inserting in-pipe working device in pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable smooth variation of the advancing direction in a pipe of an in-pipe working device to an advancing direction. SOLUTION: A guide member 3 inserted in a pipe C through a through hole 9 formed in the peripheral wall of a pipe through movement along one direction being a radial direction is formed mountably in a pipe such that its guide surface 24 is positioned in front of the in-pipe working device entering in the pipe through the through hole by push operation along one direction being the pipe radial direction. Along with entrance of the in-pipe working device in the pipe through the through-hole, the in-pipe working device is brought into contact with a guide surface. With this state, the guide tool for insertion in a pipe of the in-pipe working device varies the advancing direction in a pipe of the in-pipe working device to the direction of a pipe axis Y. A guide member is so situated that an attitude is variable to an insertion attitude that the member is inserted in the pipe through the through hole through movement along one direction being a pipe radial direction and a mounting attitude that with the member mounted in the pipe, the guide surface enters the deep side of the pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of pushing a guide member which can be inserted into a pipe through a through hole formed in a peripheral wall of the pipe by moving the pipe in one direction in the radial direction of the pipe. The guide surface is located in front of the in-pipe working device that enters the pipe from the through hole by operation, and is formed so as to be freely mountable in the pipe, and as the in-pipe working device enters the pipe through the through hole, the inside of the pipe is changed. The present invention relates to a guide for insertion into a pipe of an in-pipe working device that changes an advancing direction in a pipe of the in-pipe working device to a pipe axis direction by bringing a working device into contact with the guide surface.

[0002]

2. Description of the Related Art A guide for insertion into a pipe of the above-mentioned pipe working device (
(Hereinafter, the guide is simply referred to as an in-pipe insertion guide) .A guide member that can be inserted into the pipe through a through-hole in the pipe peripheral wall by moving in one direction in the pipe radial direction is provided. There is an advantage that can be simplified. The conventional guide for insertion into a pipe is provided with a guide member of a fixed shape that can pass through the through-hole by moving in one direction in the pipe radial direction, and therefore the guide surface is also formed in a fixed shape.

[0003]

For this reason, the length of the guide surface which can extend in the pipe axis direction with the guide member mounted in the pipe is limited to at most approximately the diameter of the through-hole at the maximum. If the guide length of the surface by contact with the in-pipe working device is short, and the contact between the in-pipe working device and the guide surface is released before the traveling direction of the in-pipe working device can be fully changed, There is a disadvantage that the device is pressed against the inner surface of the pipe from the pipe radial direction, and it is difficult to smoothly change the traveling direction of the working apparatus in the pipe in the pipe axis direction. The present invention has been made in view of the above circumstances, and has as its object to smoothly change the traveling direction of a working device in a pipe in a pipe axis direction.

[0004]

According to a first feature of the present invention, a guide member which can be inserted into a pipe through a through hole formed in a pipe peripheral wall by movement along one direction in a pipe radial direction is provided. The guide surface is located in front of the in-pipe working device that enters the pipe from the through hole by a pushing operation along one direction in the pipe radial direction, and is formed so as to be freely mountable in the pipe, and the in-pipe working device passes through the through hole. As we enter the tube,
A guide for insertion into a pipe of an in-pipe working device for bringing the in-pipe working device into contact with the guide surface and changing a traveling direction in the pipe of the in-pipe working device to a pipe axis direction, wherein the guide member is a pipe. A point in which the posture can be freely changed between an insertion position in which the guide surface can be inserted into the tube through the through-hole by movement along one direction in the radial direction and a mounting position in which the guide surface enters the inside of the tube when mounted in the tube. It is in. [Function] By moving the guide member along one direction in the pipe diameter direction,
When the guide member is inserted into the pipe through the through-hole formed in the peripheral wall of the pipe, the guide member is inserted in the insertion posture that can be inserted into the pipe through the through-hole by moving in one direction in the pipe radial direction, and the guide inserted into the pipe is provided. When the member is mounted in the pipe, the posture can be changed to a mounting posture in which the guide surface enters the inner side of the pipe while the guide member is mounted in the pipe. [Effect] Since the length of the guide surface which can be extended in the pipe axis direction with the guide member mounted in the pipe is not limited to substantially less than the diameter of the through hole, the guide length of the guide face by contact with the working device in the pipe. The contact between the in-pipe working device and the guide surface can be released after the traveling direction of the in-pipe working device is sufficiently changed, so that the traveling direction of the in-pipe working device in the pipe can be changed. Can be changed smoothly in the axial direction.

According to a second aspect of the present invention, the guide member is urged to return to the insertion position, and is brought into contact with the inner surface of the pipe when the guide member is inserted into the pipe, thereby resisting the urging force. In such a manner as to change to the mounting posture. [Operation] When the guide member is mounted in the pipe, the guide member is brought into the mounting position against the urging force by contacting the guide member with the inner surface of the pipe as the guide member is inserted into the pipe in the insertion posture. When the guide member attached to the inside of the tube is taken out of the tube, the guide member returns to the insertion position by releasing the contact between the guide member and the inner surface of the tube when the guide member is taken out of the tube. Can be done. [Effect] By the operation of moving the guide member in one direction in the pipe diameter direction, the insertion posture and the mounting posture can be easily changed with good timing.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 shows a water extraction device B as an in-pipe working device for extracting water collected in a cylindrical polyethylene resin gas pipe C for supplying city gas to the outside of the pipe. A pipe insertion device A of a pipe working device to be inserted into a gas pipe C through a branch pipe joint D which is thermally fused to and connected to C, and the pipe working device according to the present invention is attached to the pipe inserting device A. The guide tool 22 for insertion into a tube is provided.

The water extraction device B includes an in-pipe photographing camera 1 formed in a substantially cylindrical shape, and a water extraction head 2 provided in front of the camera 1, and the water extraction head 2 is provided with a flexible water absorption pipe 3. And a flexible water extraction hose 5 made of polyethylene resin as a flexible and long body for pushing and pulling the water extraction device B in the gas pipe C. Is connected to the rear end of the camera 1, and a camera cable for transmitting image data taken by the camera 1 to the outside of the tube is inserted into the water extraction hose 5.

Then, as shown in FIG. 7, the water extraction device B in the gas pipe C is moved by a manual push-pull operation of the water extraction hose 5 wound around the drum 7 into the gas pipe C, and When the water W accumulated in the pipe is found while watching the image photographed on the TV monitor 8, the water absorbing portion 4 of the water extraction head 2 is introduced into the accumulated water W, and the water is driven by the pump P. It is configured to absorb W and discharge it through the water extraction hose 5 to the outside of the pipe.

The branch pipe joint D is provided for drilling a branch hole (through hole) 9 in the pipe peripheral wall at the time of branch work, and communicates with the gas pipe C from the pipe radial direction through the branch hole 9. And a branch pipe connecting cylinder 11 communicating along the pipe axis direction of the gas pipe C in the middle of the working cylinder 10, and the branch pipe connecting cylinder 11 is connected to the branch pipe connecting cylinder 11. E is connected, and an in-pipe insertion device A is connected and fixed to the opening of the working cylinder 10 normally closed airtight by the cap 12.

The in-pipe insertion device A includes a cylindrical casing 14 which forms a housing chamber 13 which can house the water extraction device B from one end side in a state where the water extraction hose 5 is projected outside, and An insertion passage 1 that communicates with the other end of the storage chamber 13 and allows the water extraction device B stored in the storage chamber 13 to be inserted into the gas pipe C from the pipe radial direction through the working cylinder 10.
5 is provided, and a switching tool 16 is provided in the insertion passage 15, and the insertion passage 15 is switched between a communication state in which the accommodation chamber 13 communicates with the gas pipe C and a blocking state in which the communication is cut off. It is provided freely.

The switching tool 16 is provided on the passage cylindrical body 17 forming the insertion passage 15 so that the shutter plate 18 is moved between a closing position for closing the insertion passage 15 and a retreat position for retreating from the insertion passage 15. The casing 14 is screwed and fixed concentrically to one end of the passage cylinder 17 and the other end is screwed concentrically to the working cylinder 10. Fix the shutter plate 1
The shutter 8 is pulled out to the retreat position to switch to the communication state, and the shutter plate 18 is pushed to the closing position to switch to the blocking state.

The casing 14 is provided at one end of a small-diameter working device cylinder 19 for accommodating the water extraction device B with a sponge 20 for closing a gap with the water extraction hose 5 to keep the inside of the accommodation chamber 13 airtight. A large-diameter guide for accommodating a guide 22 for insertion into a pipe at the other end of the cylinder 19 for a working device, while sealingly sealing the cylindrical body 21 for sealing of The cylindrical body 23 for the guide is airtightly fitted to the cylindrical body 23 for the passage so as to be relatively slidable in the axial direction of the cylinder.
Of the water extraction device B into the insertion passage 15, ie, the casing 1
4 is provided to be freely expandable and contractible along the cylinder axis X direction.

The in-pipe insertion guide 22 is pushed by the water extraction hose 5 along one direction in the pipe diameter direction so that the water extraction device B enters the gas pipe C from the branch hole 9 through the insertion passage 15. Then, the front end side of the water extraction device B, that is, the water absorbing section 4 is brought into contact with the guide surface 24, and the water extraction device B
The direction of travel in the gas pipe C is changed to the direction of the pipe axis Y. As shown in FIG. Information board 3
1 and a guide member 33 having a swing guide plate 32 swingably connected to the lower end side of the fixed guide plate 31. The shrinkage operation of the casing 14, that is, one direction in the pipe radial direction is performed. Is provided so as to be freely inserted into the gas pipe C through the branch hole 9 by the movement along.

The fixed guide plate 31 is formed in the shape of a substantially half-cylindrical gutter having a lower end (tip) curved inward and a lower end having a small diameter, and the inner surface thereof is formed as a fixed guide surface 34. Then, the swing guide plate 32 is bent inward over the entire length,
Further, it is formed in a substantially half-cylindrical gutter shape having a smaller diameter toward the lower end (front end) side, and the inner surface thereof is formed as a swing guide surface 35.

Then, the lower end of the fixed guide plate 31 and the upper end of the swing guide plate 32 are connected by a hinge member 36 provided on their outer surfaces, and as shown in FIG. The swing guide plate 32 is biased by its own weight so that the swing guide plate 33 returns to an insertion position in which it can be inserted into the gas pipe C through the branch hole 9 by moving along one direction in the pipe radial direction, and the upper end of the swing guide plate 32. The size and shape of the side end face 37 are made the same as the size and shape of the lower end side face 38 of the fixed guide plate 31, and the swing guide plate 32 is mounted in the gas pipe C as shown in FIG. The upper end surface 37 and the lower end surface 38 of the fixed guide plate 31 abut,
The guide surface 24, in which the fixed guide surface 34 and the swing guide surface 35 are connected in series, is provided so that the posture can be freely changed to a mounting posture in which the guide surface 24 enters the back side of the gas pipe C.

On the outer surface of the fixed guide plate 31, a contact member 40 which comes into contact with the inner surface of the gas pipe with the insertion of the in-pipe insertion guide 22 into the gas pipe C is fixed by welding. The insertion amount of the guide 22 into the gas pipe C can be regulated.

The in-pipe insertion guide 22 is housed inside the in-pipe cylindrical body 23, and the handle 25 is fixed to the outer periphery of the working device cylindrical body 19.
Is provided so as to be rotatable around the cylinder axis X from the outside of the casing 14, and a mark or the like indicating the direction of the guide surface 24 is provided on the handle 25 or the working device cylindrical body 19. The in-pipe insertion guide 22 is provided so as to be freely rotatable so that 24 is oriented in a desired direction.

Hereinafter, using the in-tube insertion device A,
A method of inserting the water extraction device B into the gas pipe C in a live pipe state in which gas is filled in the gas pipe C will be described. As shown in FIG. 3, the branch pipe joint D, which is connected and fixed to the gas pipe C with the working cylinder 10 extending along the vertical direction, is a plastic bag in which the switching tool 16 is previously inserted. The cap 12 covering the opening of the working cylinder 10 is removed with a hand 27 covered with the bag 26 and put into the safety bag 26 through a hole provided in the safety bag 26, and the shutter plate 1 is removed.
The passage cylinder 17 of the switching tool 16 which has been moved to the closing position is screwed and fixed to the working cylinder 10 with the rubber seal ring 28 interposed therebetween.

Next, as shown in FIG. 4, the safety bag 26 is removed, and as shown in FIG. The guide member cylinder 23 is screwed into the passage cylinder 17 of the switching device 16 with the rubber seal ring 29 interposed therebetween, and the casing 14 is fixed substantially vertically. The gap is closed with a sponge 20, and the water extraction device B is airtightly housed in the housing chamber 13 together with the pipe insertion guide 22 in a shut-off state in which the communication between the housing chamber 13 and the gas pipe C is shut off.

Next, as shown in FIG.
Is switched to a communication state in which the accommodating chamber 13 and the inside of the gas pipe C communicate with each other through the insertion passage 15, and the casing 14 is contracted toward the gas pipe C. With the contraction of the casing 14, the working device cylindrical body 19 is contracted. Is inserted into the gas pipe C through the insertion passage 15 and the working cylinder 10.

Then, as shown in FIG.
By inserting the working device cylindrical body 19 until the abutment with the gas pipe inner surface, the pipe insertion guide 22 contacts the swing guide plate 32 with the gas pipe inner surface, and the swing guide plate 32 The gas pipe is swung against the urging force due to its own weight, changed to the mounting posture, and the guide pipe 24 is positioned in front of the water extraction device B that subsequently enters the gas pipe C from the branch hole 9. C
Will be installed inside.

Next, as shown in FIG. 6, while the casing 14 is contracted so that the pipe insertion guide 22 is held in the mounting position, the manual drainage hose 5 protruding to the outside of the housing chamber 13 is used. As the water extraction device B is pushed into the gas pipe C by the pushing operation, the water extraction device B comes into contact with the guide surface 24 of the guide device 22 for insertion into the pipe, and the traveling direction into the gas pipe C is guided. It is changed in the tube axis Y direction facing the surface 24.

Then, as shown in FIG.
While holding 4 in the contracted state, the water extraction device B is pushed and pulled on one side in the gas pipe C to perform the water extraction operation by the water extraction device B in the gas pipe C. By the manual drawing operation by the water extraction hose 5 protruding outside the chamber 13, the water extraction device B is inserted into the working device tubular body 19 of the casing 14 held in a contracted state, and the casing 14 is extended. In a state where the guide 22 for insertion into a tube is returned to the insertion posture, the guide 22 for insertion into a tube is rotated by 180 degrees with the handle 25 as shown by a virtual line in FIG. By the way,
The water extraction device B is caused to enter the other side of the gas pipe C, and water is extracted by the water extraction device B in the gas pipe C.

When the water extraction operation in the left and right gas pipes C is completed, the water extraction device B is drawn into the working device cylinder 19 of the casing 14 held in the contracted state by the drawing operation with the water extraction hose 5. After that, the guide 22 for insertion into the pipe
Extend the casing 14 so as to enter the inside of the guide member cylindrical body 23, switch the switching tool 16 to the blocking state, and remove the in-pipe insertion device A from the branch pipe joint D in the reverse procedure to the insertion. The opening of the working cylinder 10 is hermetically closed with a cap 12.

[Second Embodiment] FIG. 8 shows another embodiment of the guide device 22 for insertion into a pipe, in which contact members 40 are integrally formed on the left and right sides of the end of the working device cylinder 19 on the side of the insertion passage 15. The guide member 33 is supported inside the contact member 40 so as to be swingable around the horizontal axis.
B) to return to the insertion position shown in
As shown in FIG. 8 (b), the mounting posture is changed to the mounting posture against the urging force of the torsion coil spring 39 by contact with the inner surface of the tube accompanying insertion into the inside.

The guide member 33 is provided with the working device cylinder 1.
9 and the lower end side is formed into a substantially half-tubular gutter shape curved in the tube axis direction, and the inner surface thereof is formed as a guide surface 24. As shown in FIG. Upper end surface 4 of guide member 33
1 and the lower end surface 42 of the working device cylinder 19, the lower end side of the guide member 33 is held in the insertion position so that it can be smoothly changed to the mounting position as it is inserted into the gas pipe C. The rollers 43 are provided on both sides, and as shown in FIG. 8 (b), the guide member 22 for insertion into the tube is inserted until the contact member 40 comes into contact with the inner surface of the tube. Alternatively, a regulating piece 44 for regulating the swing range of the guide member 33 by engaging with the contact member 40 is provided integrally. Other configurations and methods of use are the same as in the first embodiment, and a description thereof will be omitted.

[Other Embodiments] The guide for in-pipe insertion of the in-pipe working device according to the present invention,
It may be used when the in-pipe working device is inserted into the pipe from obliquely above or from the side. 2. The guide for in-pipe insertion of the in-pipe working device according to the present invention,
It may be used when inserting an in-pipe working device such as a camera for taking pictures in a pipe or a gas bag into the pipe. 3. The guide for in-pipe insertion of the in-pipe working device according to the present invention,
Aside from the in-pipe insertion device of the in-pipe working device, the apparatus may be independently mounted in the pipe. 4. The guide for in-pipe insertion of the in-pipe working device according to the present invention,
It may be used when the in-pipe working device is inserted into a liquid pipe such as a water pipe or a sewer pipe.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an in-pipe insertion device.

FIG. 2 is a longitudinal sectional side view of a guide for insertion into a pipe.

FIG. 3 is an explanatory view of using a guide for insertion into a pipe.

FIG. 4 is an explanatory view of use of a guide for insertion into a pipe.

FIG. 5 is an explanatory view of use of a guide for insertion into a pipe.

FIG. 6 is an explanatory view of use of a guide for insertion into a pipe.

FIG. 7 is an explanatory diagram of a water extraction operation.

FIG. 8 is an explanatory view of a guide for insertion into a pipe showing a second embodiment.

[Explanation of symbols]

 9 Through-hole 24 Guide surface 33 Guide member B Working device in pipe C Pipe Y Pipe shaft

Claims (2)

[Claims] 1. A guide member that can be inserted into a pipe through a through hole formed in a peripheral wall of the pipe by movement along one direction in the pipe diameter direction, and is pushed from the through hole by a pushing operation along one direction in the pipe diameter direction. The in-pipe working device is formed so as to be mountable in the pipe such that the guide surface is located in front of the in-pipe working device that enters the pipe, and as the in-pipe working device enters the pipe through the through hole, the in-pipe working device is moved to the guide surface. A guide for inserting in a pipe of an in-pipe working device that changes a traveling direction of the in-pipe working device in a pipe in a pipe axis direction by moving the guide member along one direction in a pipe radial direction. A guide for inserting in a pipe of an in-pipe working device, the attitude of which can be freely changed between an insertion posture in which the guide surface can be inserted into the pipe through the through hole and a mounting posture in which the guide surface enters the inside of the pipe when mounted in the pipe. . 2. The method according to claim 1, wherein the guide member is urged to return to the insertion position, and is brought into the mounting position against the urging force by contact with the inner surface of the tube accompanying insertion into the tube. 2. The guide for inserting in a pipe of the in-pipe working device according to claim 1, wherein the guide is configured.