JPS6155826B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable conduit inspection device for inspecting and observing the inner periphery of a conduit by inserting a television camera into a buried conduit that accommodates and protects underground cables.

Conventionally, when burying cables, a television camera was inserted into the conduit to detect foreign objects that had entered the conduit.
The inside of the pipeline is inspected and observed by showing the presence or absence of misaligned connections, cracks in the inner wall, damaged areas, etc. on a cathode ray tube installed on the ground. It is pulled by winches installed at both ends of the conduit to move the camera back and forth within the conduit. However, a transmission cable for the TV camera must be led out from this TV camera, so a transmission cable is provided separately from the above wire, and it is fed out separately from the wire.
I was rewinding it. When the TV camera is moved backwards, if the unwinding of this wire and the transmission cable are not perfectly synchronized, one side may become slack.
These wires and cables could not be automatically rotated by power to unwind these wires and cables, as this could result in excessive tension and, in particular, damage to the transmission cables. Therefore, in this case, conventionally, the transmission cable had to be wound up manually, which required more manpower. In addition, since the camera towing winches are operated at separate locations, these inspections and
Observation work required many people.

This invention integrates the rear wire that pulls back the television camera and the transmission cable of the camera, and also makes the transmission cable free from tension.Thereby, one wire or cable is provided at the front and rear of the camera. When moving the camera back and forth within the pipeline, these wires can be pulled out or rewound by power, and the traction winches installed at both ends of the pipeline will also be remotely operated, allowing for inspection and observation of these pipelines. The purpose is to automate the work and reduce the amount of manpower required as much as possible.
Furthermore, a special clamp was used to prevent tension from being applied to the transmission cable.

An embodiment of the present invention will be described below with reference to the drawings. First, the overall structure of the present invention will be explained with reference to FIGS. 1 and 2. 1 is a pipe, 2 is a manhole at both ends of the pipe 1, 3 is an entrance/exit of this manhole 2,
4 is a television camera inserted into this conduit 1, 5
6 is a flat bar provided from one end of the guide sled 5 to the other end, and 7 is the front of the flat bar 6 at the front of the TV camera 4. This wire support 7 is provided with a vertical indication by hanging a weight or the like. Reference numeral 8 indicates a traction wire with one end wrapped around this wire support, the other end passed through a guide roller 9 provided in the manhole 2 at one end of the conduit 1, and wound around a traction winch 10 provided on the ground above the entrance/exit 3; 11 is a television set; A TV camera transmission cable whose one end is connected to the rear of the camera 4, 12 is a cable that has a built-in sheath for this transmission cable 11,
One end of this cable 12 is fixed by a clamp 13 behind the television camera 4, and the other end of the cable 12 is fixed to a manhole 2 at the other end of the conduit 1.
It is wound around a winch 16 mounted on a mobile vehicle 15 that is parked on the ground above the entrance/exit 3 through a guide roller 14 provided at the entrance/exit 3. 17 is a stop wire connecting the clamp 13 and the rear end of the flat bar 6 at the rear of the television camera 4; 18 is a winch 1;
A cable length measurement sensor 19 measures the length of the cable 12 fed out from 6, and 19 is a television receiver that is placed on the moving vehicle 15 and includes various control and operating devices to which the other end of the transmission cable 11 is connected. In the apparatus, 20 is a projector detachably provided in front of the television camera 4, 21 is a transmitting antenna provided on the mobile vehicle 15, and 22 is a receiving antenna provided on the towing winch 10 side. Next, the structure of the clamp 13 will be explained in detail with reference to FIGS. 3 and 4. Reference numeral 23 denotes a substantially hollow cylindrical clamp body, and one side of this clamp body 23 has a small diameter hollow part 24, and the other side has a large diameter hollow part 25 with a stepped part. The transmission cable 11 freely passes through the small diameter hollow part 24 and the large diameter hollow part 25. 26 is transmission cable 1
This mesh steel material 26 covers the outer periphery of the transmission cable 11 and is not fixed to the outer periphery of the transmission cable 11.
It extends to the middle of the large-diameter hollow part 25. 27
is an insulating jacket that covers the outer periphery of this mesh steel material 26,
This insulating jacket 27 extends through the inside of the small diameter hollow part 24 to the end of the large diameter hollow part 25. Therefore, the cable 12 consisting of the transmission cable 11, the mesh steel material 26, and the insulating jacket 27 is connected to the clamp body 23. It is pressed against the inner wall of the small diameter hollow part 24 and extends to the end of the large diameter hollow part 25. Reference numeral 28 denotes several tapered rings having a substantially triangular cross section that are placed around the outer periphery of the transmission cable 11 in the large-diameter hollow portion 25, and these tapered rings 28 are oriented toward the inner and outer peripheries of the mesh steel material 26. The mesh steel members 26 are arranged in a meandering manner between several tapered rings 28 as shown in FIG. 29 is the clamp body 23
A female threaded portion provided on the inner periphery of the open end of the large diameter hollow portion 25,
30 is a male threaded portion 3 that can be freely screwed into this female threaded portion 29.
1 on the outer periphery of one end, and this fastener 3
0 allows the transmission cable 11 to loosely pass through the hollow part 32 of the clamp body 23, and the female screw part 29 of the clamp body 23
When the male screw part 31 of the fastener is screwed onto the fastener 30 and the fastener 30 is tightened from the left to the right in FIG. The tapered ring 28 at the right end in FIG. 4 contacts the end wall surface of the large-diameter hollow portion 25, and several tapered rings 28 are tightened together, and the mesh steel material 26 is held between them. . Reference numeral 33 denotes two washers which are wrapped around the outer periphery of the transmission cable 11 between the fastener 30 and the tapered ring 28, 34 is an outer peripheral groove provided on the outer periphery of the fastener 30, and 35 is a groove of the fastener 30. A right-angled groove is provided on the opposing outer periphery at a right angle from the outer circumferential groove, and the folded end of the locking wire 17 is inserted into these outer circumferential grooves 34 and right-angled grooves 35, and a hook portion 36 is formed on the fastener 30. . A coupling nut 37 has a female threaded portion 38 on the inner periphery of one end thereof and can be screwed onto the outer peripheral male threaded portion 31 of the fastener 30, and this coupling nut 37 is screwed onto the male threaded portion 31 of the fastener 30. If the hook part 36
It is crowned with.

This invention has the above configuration, and the traction winch 10 at the other end of the conduit 1, which is a certain distance away from the moving vehicle 15, is remotely controlled within the moving vehicle 15 to drive the traction winch 10, thereby pulling the traction wire 8. The TV camera 4 is moved forward by pulling the cable 12, and the winch 16 is driven to pull the cable 12 to move the TV camera 4 backward. It is possible to observe the situation inside the conduit 1 by displaying the image on the television receiver 19 mounted on the pipe 15, and simultaneously record this on a VTR. At this time, the focal length of the camera 4 is adjusted, and the floodlight 20 is adjusted.
The light intensity adjustment and the like can be remotely controlled from inside the mobile vehicle 15. When the television camera 4 is moved backward, the cable 12 is pulled, but no tension is applied to the transmission cable 11 of the television camera 4, and the transmission cable 11 is not damaged. This is because the transmission cable 11 is built into the cable 12, but the mesh steel material 2 on the outer periphery of the transmission cable 11 is
6 and the transmission cable 11 are not fixed to each other, and the end of the mesh steel material 26 is clamped by the tapered ring 28 within the large diameter hollow part 25 of the clamp body 23. Therefore, the mesh steel material 26 is attached to the clamp 13. The transmission cable 11 loosely passes through the hollow part of the clamp 13, and the clamp 13 is connected to the flat bar 6 of the TV camera 4 via the locking wire 17, so that the TV camera 4, etc. The load is applied to the locking wire 17, the clamp 13, and the mesh steel material 26 in this order, and the transmission cable 11
It doesn't apply. Therefore, in this invention, a cable 12 with a built-in transmission cable 11 is provided at the rear of the television camera 4 so as to make the cable 12 into a single cable, and to avoid damaging the transmission cable when the television camera 4 is pulled by the cable 12. Therefore, the cable 12 can be wound by driving one winch 16. Therefore, as in the past, a transmission cable and a traction wire are installed separately at the rear of the TV camera, and when the TV camera is moved backwards, these cables are wound up separately, unlike conventional models that cannot be wound up by power. , traction winch 10
The camera 4 can easily move forward within the conduit 1 by winding up the traction wire 8 and cable 12 connected to the front and rear of the television camera 4 with a winch 16.
These winches 1 can be operated in one place by being able to move backwards and being able to remotely control the towing winch 10.
0 and 16 operations are possible. In addition, the present invention measures the length of the cable 12 fed out by the cable length measurement sensor 18, displays the position of the television camera 4 in the conduit 1 on the monitor of the television receiver 19, and also displays the position of the television camera 4 in front of the television camera 4. The wire support 6 has a top and bottom indication, and the TV camera 4
Even if the pipe rotates and tilts inside the pipe 1, the above-mentioned vertical display is reflected on the television receiver 19, so the location of the abnormality in the pipe 1 and the inner peripheral position on the inner wall of the pipe 1 can be accurately detected. be able to. It is also possible to attach a rotating mirror to the television camera 4 and rotate the internal mirror by remote control inside the mobile vehicle 15, thereby observing the inner circumferential wall of the conduit 1 at right angles through 360 degrees.
The above-mentioned clamp 13 is constructed by fitting a tapered ring 28 onto the transmission cable 11, inserting the end of the mesh steel material 26 between the tapered rings 28, placing the clamp body 23 over the tapered ring 28, and attaching the tightening tool 30 to the clamp. When screwed onto the main body 23 and tightened, the tapered rings 28 are tightened together and the mesh steel material 26 is held between them. As a result, the end of the cable 12 is fastened to the clamp 13, and all that is required is to lock the locking wire 17 to the hook portion 36 of the fastener 30, making it extremely easy to fasten the end of the cable 12 to the clamp 13. It is both solid and strong. Note that the mesh steel material 26 in the above embodiment
Any suitable mesh-like covering material may be used as long as it is made of hardwood having strength enough to withstand the load of the television camera 4.

As described above, the present invention integrates the rear wire that pulls back the TV camera and the transmission cable of the camera, and uses power to wind up the pull wire connected to the front of the camera and the cable provided at the rear, thereby controlling the TV camera. It can easily move forward and backward within the pipeline, and can easily and automatically automate pipeline inspection and observation work, reducing the amount of manpower involved as much as possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially sectional explanatory view showing the overall configuration of the invention; FIG. 2 is a side view of a television camera used in the invention;
The figure is a perspective view showing the clamp of the present invention with the coupling nut removed, and FIG. 4 is a partial sectional view of the same clamp. In the figure, 1 is a conduit, 4 is a television camera, 8 is a towing rope, 10 is a towing winch, 11 is a transmission cable, 12 is a cable, 13 is a clamp, 16
is a winch, 17 is a locking wire, 19 is a television receiver, 23 is a clamp body, 24 is a small diameter hollow part, 25 is a large diameter hollow part, 26 is a mesh steel material, 27
28 is an insulating jacket, 28 is a tapered ring, 30 is a fastener, 36 is a hook portion, and 37 is a coupling nut.

Claims (1)

[Claims] 1 Connect the tow wire to the front of the TV camera inserted into the conduit, connect the TV camera's transmission cable to the rear, connect the transmission cable end to the TV receiver, and connect the cable to the rear of the TV camera. A mesh-like covering material is applied to the outer periphery of the transmission cable except for a certain distance, and this is not fixed to the transmission cable to form a cable, and the transmission cable behind the TV camera is loosely placed in the hollow part of the transmission cable itself. Several tapered rings with approximately triangular cross-sections are stacked in the axial direction so that their directions are alternately reversed through the clamp, and the transmission cable is inserted into each tapered ring. Then, the coating material is snaked through the gap between each tapered ring, and the tapered ring is further tightened in the axial direction to tighten the clamp and the cable.The clamp is locked to the television camera, and the towing wire and cable are wound up. A cable conduit inspection device characterized by each being equipped with a winch.