JPH0698431A - Cable transfer technique above hot-line - Google Patents

Abstract

PURPOSE:To carry out hot-line work safely by a method wherein a moving cable and a fixed cable are gripped by gripping metals at both ends of a connecting rope, longer than a distance of moving a transmission cable and shorter than a distance from the fixed cable to a hot-line, while the fixed cable is transferred to the side of the moving cable after moving the moving cable. CONSTITUTION:Upon transferring a transmission cable 21 from a steel tower 18 to another steel tower 19, connecting devices A are connected to a plurality of places between the cable 21 and an opposed fixed cable 26 immediately above the cable 21 to grip the moving cable 21 and the fixed cable 26 by the gripping metals at both ends of the connecting devices A. The length of the connecting rope between the gripping metals 2 is longer than a moving distance and shorter than a distance from the fixed cable 26 to cable 22-25. When preparation is finished, the cable 21 is separated from the chain of porcelain insulators by a semi-metallic wheel 27, a rope, suspended around the metallic wheel 28, is pulled in an arrow (a) direction shown in the figure to connect the cable 21 to the chain of porcelaine insulators of the steel tower 19. When the transfer of the cable 21 is finished, the connecting device A is left as is and the fixed cable 26 is transferred to the side of the moving cable. This work is repeated to transfer all of the cables. According to this method, contact with a hot-line can be prevented even when the cable is cut during transferring the cables whereby the work can be effected safely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a live wire upper part transfer method, and more particularly to a wire transfer method capable of reliably preventing a risk that the wire to be transferred comes into contact with a protected wire such as a live wire.

[0002]

2. Description of the Related Art In the transfer work, one end of an electric wire laid between two steel towers is fixed to one steel tower, and the other end of the electric wire is removed from the other steel tower. It is a work to transfer the removed end to another third steel tower near the steel tower. In this case, if there is an electric wire on another line below the electric wire to be transferred and it is not possible to stop energizing the electric wire, the wire transfer work will have to be carried out live. .

In the wire transfer work performed under such circumstances, in order to prevent an accident that the wire to be transferred comes into contact with the live wire for some reason, the intermediate net is stretched or transferred to a guide rope installed in advance. Wire transfer method such as suspending electric wires is adopted.

However, the method of stretching the intermediate net has a problem that it takes time to stretch the net, and the method of using the guide rope is also constructed by installing the guide rope between steel towers and suspending the guide rope at regular intervals. Since a large number of suspension wagons must be connected to the transfer line, this also takes time, and there is a problem that it is not economical because a large number of suspension wagons are used.

On the other hand, when there is a risk of contact with a live wire only in a portion where the moving distance of the transfer wire is relatively short, such as near the steel tower on the fixed side of the transfer wire, the live wire is limited to that portion. The contact prevention means of
It is not necessary to provide contact prevention means over the entire length of the transfer wire by suspending a guide rope or the like.

Therefore, according to the present invention, as in the vicinity of the fixed-side steel tower of the transfer wire, as described above, in the portion where the transfer wire has a relatively short moving distance, the other wires installed below the transfer wire are installed. An object of the present invention is to provide a wire transfer method for transferring wires while preventing contact with a protected electric wire such as a live wire.

[0007]

In order to solve the above problems, the present invention is directed to both ends of a connecting rope which is longer than a moving distance of a transfer wire and shorter than a distance from a fixed wire to a protected wire such as a live wire. A wire connecting metal fitting is attached to the wire, and the wire connecting wire and the fixed wire are respectively gripped by the gripping metal fittings of the wire connecting tool at the upper part of the protected electric wire, and the wire connecting wire is transferred. After that, the fixed wire is transferred to the wire transfer completed wire side while the connection tool is left in the state where the wire transfer is completed.

[0008]

1 and 2 show an example of a connecting tool. This connecting tool comprises a connecting rope 1 and gripping fittings 2 attached to both ends thereof. The grip fitting 2 has a pair of half-divided grip pieces 2a and 2b facing each other, and a hinge pin 5 (see FIG. 2).
One of the gripping pieces 2
A protrusion 6 is provided on the back surface of b to limit the opening angle of both gripping pieces 2a and 2b (see the alternate long and short dash line in FIG. 2).

Further, a plurality of recesses 3a, 3b are provided facing each other on the open side edges of both gripping pieces 2a, 2b, and a bolt 7 is rotatably attached to one of the recesses 3a by a pin 8. By fitting the threaded portion of the bolt 7 into the other recess 3b and tightening the nuts 9 screwed into the threaded portion to the flat surfaces 11 formed on both sides of the recess 3b, the two gripping pieces 2a and 2b are clamped. The fitted electric wire 12 is clamped and gripped.

A mounting bracket 13 is rotatably mounted on the pin 8 of the one gripping piece 2b around the pin 8 at the central portion of the gripping piece 2b, and a mounting hole 14 of the mounting bracket 13 is provided. A ring-shaped connecting fitting 15 is attached to the. The connecting fitting 15 is C-shaped, and a nut 16 is screwed into the threaded portion at the open end of the connecting fitting 15, and both ends of the connecting rope 1 are inserted into and joined to the connecting fitting 15.

A shock absorber may be provided to disconnect the rope 1 when an abnormal tension of a certain level or more acts on the connecting rope 1.

Next, a wire transfer method using the above-mentioned connecting tool will be described.

In FIG. 4, reference numeral 17 is a fixed iron tower, 18 is an old transfer iron tower, and 19 is a new transferred iron tower. An electric wire (transferred electric wire) provided between the fixed iron tower 17 and the old transferred iron tower 18. ) 21
Is to remove one end from the old transfer tower 18 and transfer to the new transfer tower 19. The electric wires 22 to 25 of other lines pass through the lower phase of the fixed steel tower 17, and the electric wires 22 and 23 are out of power, but the electric wires 24 and 25 are live wires. In such a case, when the transfer wire 21 has a trouble such as disconnection in the middle of the transfer, it must be surely prevented from contacting not only the live wires 24 and 25 but also the other wires 22 and 23. .

Therefore, in the construction method of the present invention, the moving electric wire 21 (see the alternate long and short dash line in FIG. 4) is provided above the electric wires 22 to 25, and the fixed electric wire 26 is erected directly above the moving electric wire 21. Between them, the above-mentioned connecting tool A is attached (see FIG. 5), and the holding metal fittings 2 and 2 at both ends thereof are held by the transfer wire 21 and the fixed wire 26, respectively. This connecting tool A is attached at a few places.

When the above preparations are completed, the semi-finished gold wheel 2 is installed between one end of the transfer wire 21 and the old transfer tower 18 as usual.
7 and separate the end from the insulator string, and transfer wire 2
As shown by an arrow a, the transfer wire 21 is pulled toward the new transfer tower 19 side by the rope hung via the gold wheel 28 hung in the middle of 1 (see the chain double-dashed line). Pulled transfer wire 21
Set the end of the to the tip of the insulator string on the side of the new transfer tower 19
Semi-gold car 2 assembled between the tower 19 and the transfer line 21
9 is wound up (see arrow b), adjusted to a predetermined sag, and the wire transfer is completed (see wire transfer wire 21 shown by a solid line).

Next, the fixed electric wire 26 is connected to the new transfer tower 1
When transferring to the 9 side, after the above work is completed, leave the connector A as it is without removing it,
The fixed electric wire 26 is transferred in the same manner as described above. That is, in this case, the fixed electric wire 26 becomes the transfer electric wire, and the transfer electric wire 21 in the transfer completed state becomes the fixed electric wire.

In the transfer method as described above, the connecting tool A is used.
The connecting rope 1 must be longer than the moving distance thereof so as not to hinder the transfer of the transfer wire 21.

On the other hand, when the wire transfer wire 21 is broken during the wire transfer work and the wire transfer wire 21 falls below the insulator string 31 of the fixed steel tower 17 as shown in FIG. Since 21 is connected to the fixed electric wire 26 by the connecting tool A, the dropped moving electric wire 21 is supported by the fixed electric wire 26,
It does not come into contact with any of the protected electric wires 22 to 25.

In this case, in order to prevent the dropped moving electric wire 21 from coming into contact with the protected electric wire 22 that is the closest to it, the connecting rope 1 of the connecting tool A is fixed to the fixed electric wire 26 from the point where it is fixed. It must be shorter than the distance to the protective wire 22.

However, since the fixed electric wire 26 connected through the connecting tool A is slightly displaced downward when the transfer electric wire 21 is dropped due to a disconnection or the like, the distance is not taken into consideration in the displacement amount. I won't.

Further, as shown in FIG. 6, the transfer wire 21 is
When installed in the lower phase of the fixed steel tower 17, the moving distance of the transfer wire 21 is almost the same as the above case,
The distance between the protected electric wire 22 and the fixed electric wire 26 is the fixed tower 17.
In the part close to, it becomes shorter than the above case. If the connecting rope 1 shorter than this distance is used, the transfer line will be hindered. Therefore, like the connecting tool A ′, the middle-phase electric wire 32 installed above the connecting tool A ′ is used as a fixed electric wire, and the electric wire 32 and the moving electric wire 21 are connected by the connecting tool A ′.

In this way, the connecting rope 1 can be set to a length longer than the moving distance of the transfer wire 21 and shorter than the distance between the fixed wire 32 and the protected wire 22.

In this case, the connecting tool A, which is mounted farther from the insulator string 31 than the connecting tool A ', connects the fixed wire 26 and the transfer wire 21 of the lower phase.

Further, the work of transferring the fixed electric wire 26 to the side of the electric wire to which the electric wire has been completely transferred is carried out in the same state as described above without removing the connecting members A and A '. To do.

[0025]

As described above, according to the present invention, the transfer wire is connected to the existing fixed wire by the connecting tool. Therefore, as a measure for preventing the transfer wire from falling, the net is stretched or the guide rope is attached. There is a convenience that does not need to be installed,
The work period can be shortened.

Further, since the connecting tool has a connecting rope which is longer than the moving distance of the moving electric wire and shorter than the distance from the fixed electric wire to the protected electric wire such as a live wire, there is a disconnection during the wire transfer work. However, the transfer wire is supported by the fixed wire via the connecting rope, and there is no danger of contacting the protected wire.

Further, the above-mentioned fixed wire transfer work can be carried out after the transfer wire transfer of the above-mentioned fixed wire is completed, leaving the connecting tool as it is. Will be a factor that can be shortened.

[Brief description of drawings]

FIG. 1 is a front view showing a part of a connecting tool.

FIG. 2 is a sectional view of the above.

FIG. 3 is a front view of the same use condition as above.

FIG. 4 is a schematic plan view during the transfer work.

FIG. 5 is a schematic front view of the transfer work.

FIG. 6 is a schematic front view of the transfer work.

[Explanation of symbols]

 1 connecting rope 2 gripping metal fittings 2a, 2b gripping piece 3a, 3b recess 5 hinge pin 6 protrusion 7 bolt 8 pin 9 nut 11 flat surface 12 electric wire 13 mounting metal fitting 14 mounting hole 15 connecting metal fitting 17 fixed steel tower 18 old transfer steel tower 19 New transfer tower 21 Transfer wire 22 to 25 Electric wire 26 Fixed wire 27 Semi gold car 28 Gold car 29 Semi gold car 31 Insulator series 32 Electric wire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Yokota 3-3-22 Nakanoshima, Kita-ku, Osaka, Kansai Electric Power Co., Inc. Issue Kansai Electric Power Co., Inc.

Claims (1)

[Claims] 1. A protection tool comprising a connecting tool having wire holding metal fittings attached to both ends of a connecting rope that is longer than a moving distance of a transfer wire and shorter than a distance from a fixed wire to a protected wire such as a live wire. After the transfer wire is transferred by gripping the transfer wire and the fixed wire by the grips of the connecting tool at the upper part of the wire, the connecting wire is left in the state when the transfer is completed. The live wire upper part transfer method, wherein the fixed wire is transferred to the wire transfer completed wire side as it is.