JP2601596B2 - In-pipe work cart positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device for an in-pipe work truck that moves in a pipeline by a traction device, and repairs, for example, pipes of above-ground plants and pipes of gas, water and the like buried underground from inside the pipes. The present invention relates to a positioning device in a pipe axis direction of an in-pipe work cart or the like used in such a case.

[0002]

2. Description of the Related Art FIG.
No. 3575) is disclosed.
In this apparatus, a pair of positioning cart units 14 and 17 are arranged at positions sandwiching the welding cart unit 8 and the polishing cart unit 9, the towing rope 2 is connected to the front and rear portions of the in-pipe work cart, and each cart unit is moved in the pipe. Guide wheels 18 are provided.

Each of the positioning cart units 14 and 17 is provided with a fixing mechanism 22 for fixing the cart unit and a positioning mechanism 21 in the tube axis direction. The welding cart unit 8 and the polishing cart unit 9 are positioned by the positioning rope 15. It is connected to the positioning mechanism 21 of the bogie units 14 and 17.

In order to perform positioning with this conventional apparatus, first, the entire apparatus is towed by the tow rope 2, and when the apparatus reaches the vicinity of the work position, the towing by the tow rope 2 is stopped. Next, the fixing mechanism 22 of the front and rear positioning cart units 14 and 17 is extended in the pipe diameter direction to fix the two positioning cart units to the pipe.

Subsequently, since the positioning mechanism 21 has a function of winding and sending out the positioning rope 15, when the welding bogie unit 8 and the polishing bogie unit 9 are moved forward to perform positioning, the positioning bogie 15 is moved forward. The positioning rope 15 is wound up by the positioning mechanism 21 of the positioning bogie unit 14, and at the same time, the positioning rope 15 is sent out by the positioning mechanism 21 of the rear positioning bogie unit 17 to perform precise positioning.

[0006]

In order to perform positioning by the conventional apparatus, positioning is performed by feeding and winding the positioning rope 15 in synchronization with the positioning mechanisms 21 of the front and rear positioning cart units 14 and 17, so that positioning is performed. In order to perform the above, at least two carriage units 14 and 17 are required, one each for the front and rear, and the positioning operation becomes complicated.

In addition, in the case of a small-diameter pipe including a curved pipe, there is a restriction on the size of the bogie due to the necessity of passing through the inside of the pipe. It is difficult to increase the traction per vehicle.

In order to increase the traction force by arranging a large number of positioning cart units, through holes are provided in the positioning cart units other than the frontmost and rearmost of the positioning cart units, and the welding cart unit 8 or the polishing cart unit 9 is provided.
It is necessary to directly connect the tow rope from each positioning mechanism, but it is difficult due to the structure of the positioning bogie unit of the conventional device, so it becomes difficult to position it in an in-pipe working device that has many bogie units and requires a large traction force for positioning .

Further, since the welding cart unit 8 and the polishing cart unit 9 are always disposed between the front and rear positioning cart units, a power line and a signal for operating the positioning cart unit in the welding cart unit 8 and the polishing cart unit 9 are provided. There is a problem that the wire penetrates and the structure of each bogie unit becomes complicated.

According to the present invention, an in-pipe work cart capable of increasing the positioning force in the pipe axis direction, easily positioning even in a small-diameter pipe including a curved pipe, and enabling a simple structure of a welding cart unit and a polishing cart unit. The purpose of the present invention is to provide a positioning device.

[0011]

SUMMARY OF THE INVENTION The present invention relates to an in-pipe working device in which a plurality of bogie units are connected in a pipe axis direction in a pipe and moved in the pipe by a pulling device arranged in the front-rear direction. In-pipe work in which a bogie unit is connected to one of the loop-shaped ropes arranged via pulleys that are arranged on the front and rear sides and that are taut from both sides, and at least one bogie unit is capable of self-propelling in the pipe axis direction. This is a bogie positioning device.

[0012]

In the present invention, bogie units 8, 9 connected by loop ropes 5 via pulleys 3, 4 tensioned from both sides with the movement of the self-propelled bogie unit 7 in the tube axis direction are self-propelled bogies. Since it moves in the same direction as the unit 7, fine positioning can be performed by fine adjustment by one self-propelled bogie unit 7.

Further, since a plurality of self-propelled bogie units 7 can be fixed to the loop-shaped rope 5 used for positioning the bogie units, the tractive force for positioning can be easily improved by increasing the number of similar self-propelled bogie units. Can be planned.

The self-propelled bogie unit 7 can perform the above-described operation if it is located between the front and rear pulleys, so that the order of the bogie units can be freely changed. By arranging them at the tail, the number of power lines and signal lines penetrating through the other welding cart unit 8 and polishing cart unit 9 can be reduced, and the structure of each cart unit can be simplified.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the positioning device for a workbench in a pipe according to the present invention will be described with reference to FIG. FIG. 1 shows an in-pipe repair device having one self-propelled bogie unit 7, in which a towing line 2 for moving the entire device in the pipe axis direction is arranged. A front pulley 3 and a rear pulley 4 are provided at a bogie-side end of the towing line 2, and a loop-shaped rope 5 is disposed between the pulleys 3 and 4.

On one of the loops of the rope 5, a self-propelled bogie unit 7, a welding bogie unit 8, and a polishing bogie unit 9 are fixed by a fixing jig 6. Each bogie unit 7,
Guide wheels 10 are attached to 8 and 9 for guiding the movement in the tube, and the self-propelled bogie unit 7 is provided with a self-propelled mechanism 11 using a motor or the like (not shown). Further, in the tube axis direction of each bogie unit, a loop-shaped rope to which the bogie is not fixed is inserted through the through hole 12 so as to be relatively movable with respect to each bogie unit.

In order to perform positioning, first, the towing line 2 is towed to move the entire apparatus, and when the welding cart unit 8 and the polishing cart unit 9 reach the vicinity of the working position, the towing by the towing line 2 is stopped. In this stopped state, the pulleys 3 and 4 before and after the device are tensioned from both sides, and the front pulley 3 and the rear pulley 4 do not move in the tube axis direction.

Next, the self-propelled carriage unit 7 is self-propelled in the positioning direction. The self-propelled trolley unit 7 is fixed to one of the loop-shaped ropes 5 attached via the front pulley 3 and the rear pulley 4 together with the welding trolley unit 8 and the polishing trolley unit 9. Thereby, the welding cart unit 8 and the polishing cart unit 9 move by the same distance in the same direction and can be precisely positioned. On the other hand, the loop-shaped rope 5 to which the bogie is not fixed moves in the through hole 12 of each bogie unit in a direction opposite to each bogie unit.

[0019]

According to the present invention, a self-propelled bogie unit is arranged and positioned in a bogie unit group connected to one of loop-like ropes attached via pulleys arranged in front and rear of a work tube in a pipe. Since the configuration is made possible, positioning can be performed by one positioning cart, and the positioning force can be easily improved even in a limited space such as a small-diameter pipe by increasing the number of self-propelled cart units. . In addition, since the position of the self-propelled bogie unit may be between the pulleys, arranging the self-propelled bogie unit rearward has an effect that the structure of other bogie units can be simplified.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a positioning device for an in-pipe work cart according to the present invention.

FIG. 2 is a side view of a conventional positioning device for an in-pipe work cart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping 2 Tow line 3 Forward pulley 4 Rear pulley 5 Loop rope 6 Fixing jig 7 Self-propelled trolley unit 8 Welding trolley unit 9 Polishing trolley unit 10 Guide wheel 11 Self-propelled mechanism 12 Through-hole 14 Front positioning trolley unit 15 Positioning Rope 17 Rear positioning unit 21 Positioning mechanism 22 Fixing mechanism

 ──────────────────────────────────────────────────続 き Continued on front page (73) Patent holder 000004123 Nippon Kokan Co., Ltd. 1-2-1, Marunouchi, Chiyoda-ku, Tokyo (73) Patent holder 000002118 Sumitomo Metal Industries, Ltd. 4-chome, Kitahama, Chuo-ku, Osaka-shi, Osaka 5-33 (72) Inventor Yoshitaka Yano 5-9-1 Nishihashimoto, Sagamihara-shi Nippon Steel Corporation Steel Structure Marine Division (72) Inventor Takashi Kobori 5-56-1, Shiramyo-cho, Minami-ku, Yokohama-shi ( 72) Inventor Michio Ozawa 4-1-2, Hiranocho, Chuo-ku, Osaka-shi Osaka Gas Co., Ltd. (72) Inventor Yasushi Yasushi 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi Toho Gas Co., Ltd. (72) Inventor Kuroda Takashi 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Inventor Shigetoshi Tsutsuno 4-5-33 Kitahama, Chuo-ku, Osaka Sumitomo Metal Industries, Ltd.

Claims (1)

(57) [Claims] An in-pipe work truck connected to a plurality of bogie units in a pipe axis direction in a pipe and moved in the pipe by a traction device arranged in a front-rear direction, wherein pulleys arranged in front and rear of the in-pipe work cart are provided. A bogie unit positioning device, wherein a bogie unit is fixed to one of the loop-shaped ropes attached via at least one of the loop-type ropes, and at least one bogie unit of the intra-tubular work cart is capable of self-running in the pipe axis direction.