JPH09284937A - Laying of cable in conduit line, connection method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce working hours and to enhance the quality by providing ups and downs slide mechanism, back and forth slide mechanism and right and left slide mechanism to a truck traveling on a rail, temporarily bearing a cable unit to convey it to a joint position, and carrying out work including alignment with the other cable unit and fitting in series. SOLUTION: Traveling sections 12 having wheels 13 and brakes 14 are provided to the front and rear of a truck 1 traveling on a rail A temporarily provided to a laying route, a filling prevention outrigger 15 and a jack 16 are additionally provided, and rising and falling slide table mounting posts 17 are erected to both ends of one side of a truck body 11 to provide rising and falling slide tables 2. Back and forth slide tables (A) 3 and (B) 4 are housed in the rising and falling slide tables 2, and a right and left slide table 5 is provided on the back and forth slide table (B) 4. A remote control box is controlled, and most part of site installation work from the laying of a cable unit to the connection can be carried out in series.

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 performing a series of installation and connection of a cable unit that constitutes a pipeline air cable line.

[0002]

2. Description of the Related Art Recently, a pipeline air cable has attracted attention as a large capacity transmission line. This is because the inner tube (conductor) is concentrically arranged inside the cylindrical outer tube (metal sheath) via an insulating spacer, SF ₆ gas is sealed inside the metal sheath, and the high voltage conductor is SF ₆ Gas insulated structure, conductor,
It has the feature that a large current of 8,000 to 10,000 A can flow due to the radiation heat dissipation on the surface of the metal sheath and the convection heat effect of gas. However, since the pipeline air cable with the above structure has a rigid structure for both the conductor and the metal sheath, it is not possible to make a long product due to restrictions in manufacturing, transportation, construction, etc.
It is necessary to manufacture and transport as a unit of about 14m single length, and to lay and connect it sequentially along the local laying position.

In the conventional method for laying a pipeline air cable, a guide rail is suspended along a predetermined route for laying a pipeline air cable, a plurality of chain hoists are attached to the guide rail, and a chain hoist is used. While lifting the cable unit, transfer it to the connection location, adjust the chain length of the chain hoist vertically, and adjust the chain hoist position along the guide rail length to suspend the cable unit and support the cable unit. It was fixed on a pedestal or foundation to be used.
As another laying method, the cable unit is mounted on the trolley, and the trolley is moved to the connection location along with the laying position of the pipeline air cable to the connecting location, and trolley is hung by the chain hoist suspended on the temporary hooks installed on the ceiling. A method of lifting the above cable unit and fixing it on a pedestal or a foundation that supports the cable unit has been adopted.

In addition, the conventional method for connecting the cable in the air in the pipeline is as follows.
A large-diameter pipe expansion part is formed at one end of the cable unit to be connected, and a small-diameter pipe expansion part is formed at the other end, and a split flange formed at a right angle to the cable unit is used for the large-diameter pipe expansion part and the small-diameter pipe expansion. Of the cable unit so as to be opposed to each other, and the pulling jig or pulling bolt attached to the axis of the pipe expanding portion is operated to press the pipe expanding portion of the cable unit through the split flange to connect them. In this method, the relative positions of the respective expanded tubes are pulled until they reach a preset position.

[0005]

In the above-mentioned conventional method, since different jigs and devices are used in the laying method and the connecting method, the cable unit cannot be laid and connected in a series, and the work is not performed. There was a problem that it was poor in efficiency, required a lot of working time, and was poor in economic efficiency.
In addition, the conduit air cable should be installed inside the metal sheath as described above.
The insulation performance is maintained by enclosing an insulation gas such as SF ₆ gas.However, if foreign metal is mixed inside, the insulation performance may deteriorate and dielectric breakdown may occur when high voltage is applied. With the connection method of No. 3, by attaching the pulling jig to the cable unit and tightening the pulling bolt with a nut, metal chips may be generated from the cable unit surface and pulling bolt and enter the metal sheath. Quality control becomes strict.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and performs a series of processes from laying of a cable unit to connection so that the working time can be greatly shortened and a stable high quality pipe can be obtained. A method of laying and connecting a cable in the air and a device used for the method are provided.
The features of the are the vertical slide mechanism that raises the cable unit that constitutes the pipeline air cable line to an arbitrary installation height, and the cable unit that moves the cable unit in the direction perpendicular to the line axis and positions it on the cable laying line axis. A trolley that is equipped with a front-rear slide mechanism that has the required front-rear stroke length and a left-right slide mechanism that has the insertion stroke length in the track axis direction that is required for connection, and that travels on a temporarily installed rail along the installation route of the pipeline air cable. In addition, there is a method for laying and connecting a pipeline air cable in which a cable unit is temporarily supported and transported to a connection position, and a series of operations up to axial fitting with a counterpart cable unit are performed.

A second feature of the present invention is that a truck running on a rail temporarily installed along a route for laying a pipeline air cable, and slide table mounting posts erected at both ends of one side surface of the truck. An elevating slide table provided between the slide table mounting posts and performing an elevating operation by the first slide mechanism, and a front and rear that is housed in the elevating slide table and moves in a direction perpendicular to the track axis by the second and third slide mechanisms. The slide tables A and B and the left and right slide tables that are located on the front and rear slide tables B and move in the track axis direction by the fourth slide mechanism are provided.
A conduit air cable laying and connecting device configured to perform a series of work up to the connecting position by temporarily supporting the cable unit on the left and right slide tables and carrying it to the connecting position.

[0008]

1 is a perspective view of the entire laying and connecting device of the present invention. In the drawings, reference numeral 1 denotes a trolley which travels on a rail A which is temporarily installed along a route for laying an aerial cable, and a predetermined connection with wheels 13 which are grounded and run on the rail A before and after the trolley body 11. It is provided with a traveling portion 12 having a brake 14 for stopping it at a position, and an outrigger 15 and a jack 16 for preventing the truck 1 from falling forward are provided so as to project in a direction perpendicular to the rail A direction. Another dolly body
The mounting posts 17 for the slide table 2 for raising and lowering are erected on both ends of one side surface of 11.

An elevating slide table 2 is provided slidably in the vertical direction between the mounting posts 17, and the elevating slide table 2 winds and winds the wire 21 and the wire 21 provided on the mounting post 17. The cable unit B is raised to an arbitrary installation height by the first slide mechanism including the chill climber 22 that performs the feeding action. Further, front and rear slide tables (A) 3 and (B) 4 are housed in the lifting slide table 2. The front and rear slide tables (A) 3 and (B) 4 are ball screws.
The cable unit B is moved in the direction perpendicular to the track axis by the second and third slide mechanisms composed of 32 and 41 and the servomotors 31 and 42 for rotating the ball screws 32 and 41, so that the cable unit B is positioned on the cable laying track axis. . Further, a left and right slide table 5 is provided on the front and rear slide table (B) 4. The left and right slide table 5 moves the cable unit B in the line axis direction by a fourth slide mechanism including a ball screw 52 and a servo motor 51 for rotating the ball screw 52, thereby giving an insertion stroke required for connection.

[0010]

The operation procedure for laying and connecting the conduit air cable of the present invention will be described with reference to FIG. (1) Cable unit B on the left and right slide table 5
Is hung by a wrecker or the like, fixed by a band, and the trolley 1 is run on the temporary rail A and laid up to a predetermined connection position. (2) To prevent the vehicle 1 stopped at the connection position from falling forward, pull out the outrigger 15 of the vehicle 1 and perform jack 16 up. (3) Select the upper phase, middle phase, or lower phase for the connection position setting switch of the remote control box. By this operation, the operation sequence and the operation dimensions of each slide table are fixed as preset.

(4) Continue pressing the up button on the remote control box. As a result, the first slide mechanism operates and the elevating slide table 2 rises. That is, the chill climber 22 is electrically operated to wind up the wire 21, and the lifting slide table 2 fixed to the end of the wire 21 is lifted. The elevating slide table 2 is elevated while being guided by the post 17 by a guide rail attached between the elevating slide table 2 and the attachment post 17. (5) The elevating slide table 2 ascends to the height of the ascending intermediate stop position and automatically stops. After the automatic stop, release the up button. (6) Press and hold the forward button on the remote control box. As a result, the second slide mechanism operates and the front-rear slide table (A) 3 moves forward. That is, when the servomotor 31 is electrically operated, the ball screw 32 rotates and the front-back slide table (A) 3 advances. The front and rear slide table 3 moves forward while being guided by a guide rail mounted between the front and rear slide tables 2. (7) The front and rear slide table 3 advances to the advance complete position and automatically stops. Release the forward button after automatic stop. (8) Continue to press the up button on the remote control box again. As a result, the first slide mechanism operates and the elevating slide table 2 ascends in the same manner as described above, elevates to the height of the ascending completion position, and automatically stops. After the automatic stop, release the up button.

(9) Continue pressing the forward button on the remote control box. As a result, the third slide mechanism operates and the front-rear slide table (B) 4 moves forward. That is, the ball screw 42 is rotated by electrically operating the servo motor 41, and the front and rear slide table (B) 4 moves forward while being guided by the guide rails mounted between the front and rear slide table (A) 3. (10) Push the lowering button of the remote control box by inching operation and repeat the lowering operation until the cable unit comes into contact with the surface of the unit holder.

(11) Press the left slide button of the remote control box to connect the cable unit. The left and right slide tables 5 slide to the left by the operation of the fourth slide mechanism, and the connection is established. That is, the ball screw 52 is rotated by the operation of the servo motor 51, and the left and right slide tables 5 slide leftward while being guided by the guide rails mounted between the front and rear slide tables (B) 4. (12) If fine adjustment movement in the up-down direction or front-back direction is required when connecting the cable unit, fine adjustment is performed by inching operation of the remote control box ascending, descending, advancing and retracting buttons. (13) After completing the connection, remove the fixed band of the cable unit.

After the connection is completed, each slide table is returned to the origin position by the following procedure. (14) The descending button of the remote control box is pushed by inching operation, and the elevating slide table 2 is lowered until the front and rear slide tables (A) 3 and (B) 4 are in the retractable position. (15) By continuing to press the reverse button of the remote control box, the front and rear slide tables move backward in the order of (B) 4 → (A) 3 and automatically stop at the origin position. (16) Hold down the lowering button of the remote control box and lower the lifting slide table 2 to the original position. Stops automatically at the home position.

The remote control box is provided with (1) connection position setting switch, (2) up button, down button, (3) forward button, backward button, (4) left slide button, right slide button. , The connection position setting switch selects one of the upper phase, the middle phase and the lower phase of the pipeline air cable, the up button and the down button use the first slide mechanism, the forward button and the reverse button use the second and second phases. The left slide button and right slide button of the third slide mechanism operate the fourth slide mechanism, respectively.

It can be said that the application of the present invention has more merits in the long-distance line having a large number of laid and connected lines, but in the case of the long-distance line, the case is usually laid in a cavern. . Therefore, it is necessary to design the carriage so that the cross-sectional shape of the cave can be accommodated when the cave is laid, and to enable the cable unit to move so as not to interfere with the cave wall or ceiling. In addition, the cable units are generally connected by pipe expansion welding, and are fitted and connected with a clearance control of a few millimeters. Therefore, each slide table of the truck is required to perform an inching operation of a few millimeters.

The operation of each slide table described in the above procedure is normally performed by continuous operation by electric motor, but inching operation (fine adjustment movement operation of several millimeters unit) is possible as necessary, and both operations are possible. A remote control box allows a worker to perform these operations at an optimum work position in each work process. Further, if necessary, fine adjustment movement can be manually performed, and fine adjustment movement can be performed as compared with inching operation.

Further, taking advantage of the fact that most of the pipeline air cables are connected in a fixed linear shape, the operation stop position of each slide table is set in advance, and the control panel of the truck in which the operation sequence is input. The movable part of the slide table of the carriage is controlled by. With this, when the connection position is selected from the upper phase, the middle phase, and the lower phase by setting the connection position setting switch of the remote control box, the operation sequence of each slide table to that position and its movement amount are fixed, It is possible to prevent an accident such as a damage on the surface of the cable unit due to an interference with a wall or ceiling of the cavern or a frame for supporting and fixing the cable unit due to a malfunction or the like.

The cable unit has a single length of about 14 m, and in order to support the length, the above-mentioned work is generally performed by connecting two carts with a connecting rod. At that time, the operation of each slide table is normally performed by interlocking with two units, but of course, independent operation is also possible. Regarding installation,
Since the wheel part of the dolly has a swinging mechanism in the front and rear, it can also run on curves and can be used for laying curved caves.

[0020]

As described above, according to the present invention,
From cable installation to connection, that is, most of the on-site installation work can be performed in a series, and the work time is greatly shortened, which in turn can reduce costs. Further, since a drawing jig for connection is not required, there is no chance of generation of metallic foreign matter during connection work, and a stable and high-quality pipeline air cable line can be obtained. Furthermore, since each slide table performs only the set operation, it can be connected without interfering with the wall or ceiling of the cave and the pedestal that supports and fixes each cable unit. Can be prevented.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a laying and connecting device of the present invention.

[Explanation of symbols]

1 dolly 11 dolly body 12 running part 13 wheels 14
Brake 15 Outrigger 16 Jack 17 Slide table mounting post 2 Lift slide table 21 Wire 22 Chill climber 3 Front and rear slide table A 31 Servo motor 32
Ball screw 4 Front and rear slide table B 41 Servo motor 42
Ball screw 5 Left and right slide table 51 Servo motor 52 Ball screw A Temporary rail B Cable unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Go Kuroda 1-3-3 Shimaya, Konohana-ku, Osaka City Sumitomo Electric Industries, Ltd. Osaka Works (72) Inventor Naoki Takinami 1 Higashishinmachi, Higashi-ku, Nagoya-shi, Aichi Chubu Electric Power Co., Inc. (72) Inventor Hideaki Ohno 1 Higashishinmachi, Higashi-ku, Nagoya-shi, Aichi Chubu Electric Power Co., Ltd. (72) Inventor Mitsuo Umehara 4-13-14 Higashi-Shinagawa, Shinagawa-ku, Tokyo Furukawa Electric Co., Ltd. Incorporated (72) Inventor Wataru Matsushita 5-5-23 Toroshima, Konohana-ku, Osaka Sumitomo Electric Co., Ltd.

Claims (2)

[Claims] 1. A vertical slide mechanism for elevating a cable unit that constitutes a pipeline air cable line to a desired installation height, and a cable unit is moved in a direction perpendicular to the line axis to be positioned on the cable laying line axis. It is equipped with a front-rear slide mechanism that has the necessary front-rear stroke length and a left-right slide mechanism that has the insertion stroke length in the track axis direction that is required for connection, and runs on a temporary rail along the installation route of the pipeline air cable. A method of laying and connecting a pipeline air cable, characterized in that a cable unit is temporarily supported on a trolley, transported to a connection position, and a series of operations up to axial fitting with a counterpart cable unit are performed. 2. A trolley that runs on a rail that is temporarily installed along a route for laying a pipeline air cable, slide table mounting posts that are erected on both ends of one side surface of the trolley, and between the slide table mounting posts. And a front / rear slide table A and B, which is installed on the first slide mechanism and is moved up and down by the first slide mechanism, and front and rear slide tables A and B that are housed on the lift slide table and move in the direction perpendicular to the track axis by the second and third slide mechanisms. A left and right slide table, which is located on the slide table B and moves in the track axis direction by the fourth slide mechanism, is provided, and the cable unit is temporarily supported on the left and right slide table and conveyed to the connection position, and the axis of the other cable unit Installation and connection of pipeline air cables characterized by being configured to perform a series of work up to mating Continuation equipment.