JPH0211458A - In-pipe moving type supporting device for cable - Google Patents

Abstract

PURPOSE:To support a cable without causing damage to same by forming a supporting device for supporting a cable connected to a work vehicle which travels in an air pipe to carry out inspection/repair, etc. with a cable through portion, wheels, a fluid holding bag which can be brought into pressure contact with the pipe by means of expansion, etc. CONSTITUTION:A work vehicle 2 for carrying out the inspection and repair of the inside of a pipe 10 travels in the pipe 10 while drawing a cable 4 which is delivered from on the ground. A supporting device for supporting this cable 4 without being brought into contact with the bent portions of the pipe 10 is formed with a plurality of supporting device bodies 3 which are continuously linked to the work vehicle 2. Each supporting device body 3 consists of a cable through portion 15, a plurality of wheels 6, a flexible fluid holding bag 9 which is expandable outward beyond the outermost end 20 of each wheel 6, and a valve device 16 for controlling the feeding/discharging of fluid pressure. The supporting device body 3 on the rearmost position out of a supporting-device body 3 group is separated at each bent portion of the pipe 10 and fixed to the bent portion by expanding the holding bag 9 thereof.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a movable cable support device within a pipe, and is particularly applicable to a cable support device that is connected to a working vehicle moving inside a gas pipe, an oil pipe, a water pipe, etc. The present invention relates to a movable cable support device that supports cables at bends in these pipes so that they do not come into contact with pipe walls and with reduced contact resistance.

[Conventional technology] In order to inspect or repair defective parts of gas pipes, oil pipes, water pipes, etc. buried underground,
Recently, a method of inspecting and repairing the pipes from inside by moving a working vehicle through these pipes by remote control has been attracting attention recently.

This work vehicle is connected to the ground by a cable consisting of control signal lines, power pipe lines, etc. for power, air, etc., and defects in the piping are detected by control signals, power, and air sent by cable from the operating device installed on the ground. Inspection work and repair work are now being carried out. Inspection and repair work using this work vehicle can be carried out from inside the pipe, so there is no need to excavate underground, and the work can be carried out remotely from above ground without the need for workers to enter the pipe, making it safe. It is also said to be useful in terms of work efficiency.

[Problems to be Solved by the Invention] However, the above-mentioned work vehicle travels inside the pipe while pulling the cable that is fed out from the ground, and performs inspection and repair work. In this case, as shown in FIG. 7, not only a straight section but also a bent section A is formed in the pipe 10, and when the work vehicle 11 moves normally inside the pipe 10, the cable 15 comes into contact with the bent section A. There was a problem that the machine would run steadily while being pulled. Therefore, the cable 15 is
There was a problem in that friction was generated and the cable could be damaged due to this friction. In addition, this friction places a burden on the regular driving force of the working vehicle 11, which may be several times the weight of the working vehicle 11, and therefore,
There was a problem in that it also interfered with inspection and repair work inside the pipes.

The present invention has been made to solve these problems, and its purpose is to fix a cable to a bend in the pipe so that it can be detached from the bend so that the cable does not come into contact with the bend. An object of the present invention is to provide a support device and a roller AM that reduces contact resistance of a cable inserted through the cable support device.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a support device main body having a penetration part through which a cable is inserted, and a support device provided on the outer periphery of the support device main body for guiding the inside of the piping. a wheel; a flexible fluid retention bag that is collapsible below the outermost edge of the wheel and expandable beyond the outermost edge of the wheel; It is composed of a valve device for discharging the water.

A swivel ring is provided in the penetration part so as to be rotatable with the cable and around the cable with respect to the main body of the cable support device, and the center of the swivel ring is located at a position offset from the center of rotation of the swivel ring. It is constructed by providing a roller in a direction perpendicular to the axis, and a roller mechanism that guides the cable onto the roller and maintains the position of the cable near the center of the roller using a guide plate.

[Function] By inflating the fluid retaining bag provided in the cable support device at the bend in the pipe, this support device can be fixed to the bend, so this support device prevents friction between the cable and the bend. In addition, the roller mechanism provided in this support device allows the cable to have extremely low frictional resistance at the bent portion of the piping, and the cable passing through this bent portion is prevented by friction. It cannot be damaged.

Further, there is no need to apply extra regular driving force to the working vehicle that pulls the cable that is normally used with the cable.

In addition, the roller mechanism installed in the penetration part of the cable support device allows the cable to be pulled from any direction.
It can be supported in the center.

[Embodiment] A preferred embodiment of the present invention will be described with reference to the accompanying drawings.A cable support device 1 according to this embodiment includes a predetermined number of support device bodies 3 connected to a working vehicle 2, as shown in FIG.
It is installed so as to be pulled by a work vehicle 2 for inspecting and repairing the inside of the pipe 10 installed underground, and to move regularly from the entrance side B toward the back side C.

A cable 4 from the entrance ff1B is connected to the working vehicle 2 by passing through the penetration portion 15 of each support device main body 3. This cable 4 is connected to a control operating device on the ground (not shown) and a driving source such as electric power or air.
It reaches the work vehicle 2, and then makes a U-turn from the work vehicle 2 and is connected to each device main body 3. Then, using this operation signal and power, the work vehicle 2 performs inspection and repair work at a predetermined location in the pipe 10, and also fixes and fixes the device body 3.
Secession takes place. For this reason, the work vehicle 2 and a predetermined number of supporting device bodies 3 are connected to each other by detachable couplers 31, respectively. Note that the predetermined number of support device main bodies 3 is the number of bent portions 4 formed in the pipe 10 to be inspected and repaired.

The work vehicle 2 configured as described above and the supporting device main body 3 connected thereto are located at the back ff! from the inlet side C of the pipe 10! ! The train is moving in the direction of the IC.

Then, at the first bend in the pipe 10, the detachment forces 31 between the rearmost support device main body 3 and the second support device main body 3 from the rearmost are removed, and the fluid retaining bag 9 is expanded. Then, the second supporting device body 3 from the rear is fixed to the second bent portion A, and the supporting device main bodies 3 are fixed to the bent portion A in sequence. be done.

As shown in FIG. 1, the support device main body 3 constituting the cable support device 1 according to this embodiment has a penetration portion 15 for passing the cable 4 through the main body 3, and a penetrating portion 15 provided on the outer periphery of the support device main body 3. A visible fluid holding bag 9 that can be contracted to a lower position than the outermost #A20 of the wheel 6 and expandable outward from the outermost end of the wheel 6. and a valve device 16 for supplying fluid pressure into or discharging fluid pressure into the fluid holding bag 9.

As shown in FIGS. 2 and 3, the penetrating portion 15 is provided with a turning ring 17 coaxially with respect to the support device main body 3 and rotatable around the cable 4. A roller 2 is mounted in a direction perpendicular to the central axis 18 of the swivel ring 17 at a position offset from the rotation center 21 of the swivel ring 17.
A roller mechanism 23 is provided which guides the cable 4 onto the roller 24 and maintains the position of the cable 4 near the center of the roller 24 by means of a guide plate 28.

That is, the support device main body 3 is provided with a penetration portion 15 through which the cable 4 is inserted through the center thereof.

Then, on the outer periphery of this support device main body 3, three wheels @ 6 are provided at the front and rear parts of this main body 3, respectively, facing the direction in which the outer periphery is divided into three parts, for making the inside of the pipe 10 move normally. .

A fluid retaining bag 9 in the form of a floating bladder made of a visible material such as rubber is provided between the front part and the rear part so as to surround the outer periphery of the support device main body 3.

This fluid retaining bag 9 also has wheels 6 provided on its outer periphery.
The wheel 6 is formed so that it can be contracted to a lower position than the outermost end 20 of the wheel 6, and expandable outward from the outermost end 20 of the wheel 6. A valve device 16 is provided on the inner peripheral side of the support device main body 3 to supply fluid pressure for contracting and expanding the fluid holding bag 9 or to discharge fluid pressure.

As shown in FIGS. 1 and 6, the valve device 16 has a support device main body 3 that is connected to the working vehicle 2 in the piping 10 in sequence toward the inlet side B. A detachment coupler 31 is provided with an electromagnetic pulp 30 operated by remote control to separate the air pipe 29 for the air pressure sent to and from the supporting device main body 3 adjacent to the air pipe 29, and A press-fit solenoid valve 32, also operated by remote control, for press-fitting the fluid holding bag 9 and an inlet fil! from SaC! A manual release lever 33 provided at the end of the support device main body 3 that is reversely moved to the IB
and a manual air opening/closing valve 34 which contacts the fluid holding bag 3 to discharge air pressure from the fluid holding bag 3.

The control signals and air pressure for performing the above operations are sent from the ground via a cable 4 to the working vehicle 2 at the back (! Connected to be reversed.

Penetration portion 1 through which the cable 4 of the support device main body 3 is inserted
5 is provided with roller mechanisms 23 at both ends thereof to support and guide the cable 4. This roller machine #123 can rotate around the central axis of the support device main body 3, and has a rotating ring 17 that is rotatably provided around the cable 4, and rotates at a position offset from the center of rotation of the rotating ring 17. A roller 24 is provided in a direction perpendicular to the center axis 18 of the ring 17, and a cable 4 is guided on the roller 24, and a roller 24 is provided to maintain the position of the cable 4 near the center of the roller 24. Information board 28
It consists of

Next, the operation of the present invention will be explained.

The work vehicle 2 and a predetermined number of support device bodies 3 connected thereto enter the pipe 10 through an inlet 111! The support device main body 3 at the rearmost part reaches the first bent part A of the pipe 10 as shown in FIG. 5. The arrival at this bending part A is measured on the ground using visible light from the ground or by a television camera or the like installed on the work vehicle 2.

At this bent portion A, the support device main body 3 is fixed and separated. That is, as shown in Figure 6, which shows the concept of operation,
The press-fit solenoid valve 32 of the air pipe 29 is opened by remote control from the ground, pressurized air is press-fitted into the fluid holding bag 9 provided on the outer periphery of the support device main body 3, and then the press-fit solenoid valve 32 is closed and sealed. be done. As a result, the fluid retaining bag 9 expands (towards the outside of the wheels 6 provided on the outer periphery) and presses the entire inner periphery of the pipe 10, and the support device main body 3 is pushed inside the pipe 10. Then, also by remote control, the detachable coupler 31' connecting the adjacent supporting device main body 3' is removed.
is activated, these bodies 3, 3' are separated, and the electromagnetic pulp 30' is activated, stopping the supply of pressurized air to the adjacent support device body 3.

In this state, the rearmost support device main body 3 is connected to the pipe 10.
The work vehicle 2 is fixed at the bend A of 2, and the work vehicle 2 is driven straight toward the next bend A. At the next bend A detected by the ground operating device, the f& second supporting device main body 3 from the rear is fixed to the bend A in the pipe 10 in the same manner as described above.

In this way, the work vehicle 2 is moved to the supporting device main body 3 at the bending part A.
While fixing and separating the pipes, the pipes are moved steadily through the pipe 10, and the inside of the pipe 10 is inspected and repaired using signals and power from the ground.

The cable 4 is pulled and passed through the penetrating portion 15 of the support device main body 3 fixed to the bent portion A in the pipe 10 as the work vehicle 2 moves normally.

The cable 4 is connected to the roller mechanism 2 provided in this penetration part 15.
3 allows the fluid to flow with extremely little frictional resistance. That is, due to its own weight and its tensile force, the cable 4 is rotated around the center axis 18 of the swivel ring 17 of the roller mechanism 23.
It is supported on rollers 24 provided perpendicular to the . This roller 24 is provided so that it can rotate with respect to the fixed supporting device main body 3 by means of a turning ring 17, and in such a way that the cable 15 is always supported at the center by a guide plate 28, so that the cable 15 is always supported at its center. The bending portion A can be supported in any pulling direction from the working vehicle 2 with little frictional resistance.

The work vehicle 2 that has finished inspecting and repairing the inside of the pipe 10 is moved back from the back side C toward the entrance side B. Along with this regular movement, the cable 4 is pulled from the ground and wound up. Then, this working vehicle 2 comes into contact with the support device main body 3 on the fi rear side C. Here, the entrance of the work vehicle 2 fft!
A manual opening/closing lever 33 provided protruding from the IB comes into contact with an opening/closing rod 35 of a manual air opening/closing valve 34 of the support device main body 3, and acts to discharge the pressurized air in the fluid holding bag 9.

Due to this action, the fluid retaining bag 3 is contracted inward from the outermost end 20 of the wheel 6 provided on the outer periphery of the main body 3, and the support device main body 3 fixed to the pipe 10 is released and can move freely. becomes. Therefore, the work vehicle 2 is pressed against the support device main body 3 at the entrance 11! ! It is scheduled for JB. Next, the support device main body 3 fixed to the second bent part A from the innermost side C of the pipe 10 has its manual air on/off valve 34 brought into contact with the manual release lever 33 of the support device main body 3, and the fluid is retained. By releasing the compressed air in the bag 9, the fixed state with the piping 10 is released. In this way, the cable 4, the support device main body 3, and the work vehicle 2 are
is moved to the ground, and inspection and repair work on the piping 10 is performed.

[Effects of the Invention] As described above, according to the present invention, the following excellent effects can be exhibited.

1. Since the cable support device through which the cable is inserted can be fixed at each bend in the piping, the cable will not come into contact with the bend in the pipe, which will prevent friction damage to the cable and prevent work from RFI friction resistance of the cable. There is no burden on the vehicle to drive the vehicle.

2. By inflating the fluid holding bag with fluid pressure,
The cable support device can be easily fixed in the pipe, and the roller R can support the tensile force applied to the cable from any direction.

[Brief explanation of the drawing]

FIG. 1 is a side view of the support device main body according to the present invention, FIG. 2 is a front view of the roller mechanism provided in the penetration part of FIG. 1, FIG. 3 is a side view of FIG. 2, and FIG. FIG. 5 is an arrangement diagram of the support device main body according to the present invention, FIG. 5 is an arrangement diagram at the bending part of FIG. It is a figure which shows a contact state. In the figure, 3 is the support device main body, 6 is the wheel, 9 is the fluid holding bag,
10 is a pipe, 15 is a penetration part, 16 is a valve device, 17 is a turning ring, 18 is a center axis of the turning ring, 20 is the outermost end of the wheel, 21 is a turning center, 23 is a roller mechanism, 24 is a roller, 28 is a guide board. Patent applicant: Patent attorney representing Ishikawajima-Harima Heavy Industries Co., Ltd.
Nobuo Kinuya

Claims (1)

[Scope of Claims] 1. A supporting device main body having a penetration part through which a cable is inserted, a wheel provided on the outer periphery of the supporting device main body for keeping the inside of the pipe regular, and a lower position than the outermost end of the wheel. A flexible fluid holding bag that is collapsible and expandable beyond the outermost end of the wheel, and a valve device for supplying fluid pressure to or discharging fluid pressure into the holding bag. A movable cable support device inside piping characterized by: 2. A swivel ring is provided in the penetration part of the main body of the cable support device so as to be rotatable around the cable, and a swivel ring is provided at a position offset from the center of rotation of the swivel ring in a direction perpendicular to the center axis of the swivel ring. The movable cable in piping according to claim 1, further comprising a roller mechanism for guiding the cable on the roller and maintaining the position of the cable near the center of the roller by a guide plate. Support device.