JPH09247832A - Jumper apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of coronas by extending both ends of a pipe part to the sides of supporting devices to shorten the length of each supporting device and a jumper wire correspondingly to the extended part of the pipe part. SOLUTION: One-end side of a supporting device 2 is attached to the end part of a pipe part 1 and its other-end side is attached to a yoke 4. One-end side of a jumper wire 3 is connected electrically to the end part of the pipe part 1 and its other-end side is connected electrically to an anchor clamp 7 for anchoring in a supporting way a transmission line 6. Especially, both the ends of the pipe part 1 are extended respectively to the sides of the supporting devices 2 to shorten the length of each supporting device 2 and the jumper wire 3 correspondingly to the extended part of the pipe part 1. That is, both the ends of the pipe part 1 are extended by a predetermined length to the sides of the supporting devices 2. Accompanied by extending both ends of the pipe part 1 to the sides of the supporting devices 2 by the predetermined length, the lengths of the supporting devices 2 are shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumper device used for a tension steel tower section of an overhead power transmission line.

[0002]

2. Description of the Related Art A jumper device as shown in FIG. 2 is used in a tension-resistant tower section of an overhead power transmission line. This jumper device includes a pipe portion 1, a supporting device 2, and a jumper wire 3.

The pipe portion 1 is made of an aluminum pipe and has a linear shape. The support device 2 has one end attached to the end of the pipe portion 1 and the other end attached to the yoke 4. As a result, the pipe part 1
Is suspended from the steel tower 5. Although not shown, the supporting device 2 supports the pipe portion 1 so that the pipe portion 1 can move in the line direction and the line direction orthogonal to each other by combining right-angled clevis coupling fittings.

One end of the jumper wire 3 is electrically connected to the end of the pipe portion 1, and the other end of the jumper wire 3 is electrically connected to a tension clamp 7 that holds and supports the power transmission line 6. As a result, the power transmission lines 6 are electrically connected to each other.

In the figure, reference numeral 8 is a series of insulators interposed between the yoke 4 and the steel tower 5, and 9 is a jumper spacer for keeping the distance between the jumper wires 3 constant.

[0006]

As described above, in the structure in which both sides of the linear pipe portion 1 are suspended and supported by the supporting device 2, the pipe portion 1 easily swings in its longitudinal direction,
For this reason, there was a problem that the insulator 8 was damaged or a power failure occurred. That is, when galloping vibration is generated in the power transmission line 6, the galvanizing vibration resonates and the pipe portion 1 also vibrates greatly in the longitudinal direction thereof.
It causes damage to the power plant and a power failure accident. Further, in the conventional structure, the length of the jumper wire is long, so that the mounting work is troublesome, and the number of jumper spacers used is large and expensive. Further, in the conventional structure, since the slack portion of the jumper wire (see reference numeral 10 in FIG. 2) is located below the lower surface of the pipe portion 1, there is a problem that corona easily occurs from the slack portion of the jumper wire.

[0007]

SUMMARY OF THE INVENTION The present invention provides a jumper device which solves the above-mentioned problems, and has a structure in which a pipe portion, a support device for suspending and supporting the pipe portion, and an electric current are applied to the pipe portion. In a jumper device comprising a jumper wire for supplying, both ends of the pipe part are extended to the support device side, and the lengths of the support device and the jumper wire are shortened corresponding to the extension of the pipe part. It is characterized by that.

As described above, when both ends of the pipe portion are extended toward the support device side and the length of the support device is shortened in accordance with the extension, both ends of the extended pipe portion become rigid and the support device is provided. Since the length of the pipe becomes short, it becomes difficult for the pipe part to move in the longitudinal direction. Further, by shortening the length of the jumper wire in accordance with the extension of the pipe portion, the number of jumper spacers used can be reduced and the slack portion of the jumper wire is positioned above the lower surface of the pipe portion 1. be able to.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to FIG. The jumper device according to the present invention includes a pipe portion 1, a support device 2, and a jumper wire 3,
The pipe portion 1 is formed of an aluminum pipe, and the support device 2 has one end side attached to the end portion of the pipe portion 1 and the other end side attached to the yoke 4, and the jumper wire 3 has a pipe portion on one end side. It is the same as the conventional configuration in that it is electrically connected to the ends of the section 1 and the other end is electrically connected to the strain clamps 7 that hold and support the power transmission line 6, respectively. Is extended to the side of the supporting device 2, and the lengths of the supporting device 2 and the jumper wire 3 are shortened in accordance with the extension of the pipe portion 1.

That is, both ends of the pipe portion 1 are extended to the supporting device 2 side by a predetermined length. 1A is the extension. Since both ends of the pipe portion 1 are extended to the supporting device 2 side by a predetermined length, the length of the supporting device 2 is shortened. The support device 2 supports the pipe part 1 so that the pipe part 1 can move in the line direction and the line direction orthogonal to each other by combining connecting fittings of right-angled clevis as in the conventional case.

Further, the length of the jumper wire 3 is shortened by extending both ends of the pipe portion 1 toward the supporting device 2 by a predetermined length. When the jumper wire 3 is shortened, stress is easily applied to the jumper wire 3, and therefore, it is preferable to use a twisted wire having a high flexibility as the jumper wire 3.

The length of extension of both ends of the pipe portion 1 toward the support device 2 is appropriately selected according to the line condition and the like.

[0013]

As described above, in the jumper device according to the present invention, both ends of the pipe portion are extended to the support device side, and the length of the support device is shortened corresponding to the extension, so that the extended pipe is extended. The ends of the section are rigid and the length of the support device is short, which makes the pipe section difficult to move in its longitudinal direction. Therefore, even if galloping vibration occurs in the power transmission line, the pipe portion 1 is less likely to vibrate in the longitudinal direction thereof, so that damage to the insulator string or power failure accident can be effectively prevented. Further, since the length of the jumper wire is shortened in accordance with the extension of the pipe portion, the number of jumper spacers used can be reduced and the slack portion of the jumper wire can be located above the lower surface of the pipe portion 1. it can. Therefore, it is possible to obtain a jumper device that is inexpensive and is less likely to cause corona. Further, since the jumper wire is short, it can be installed easily.

[Brief description of drawings]

FIG. 1 is a front view of a jumper device according to the present invention.

FIG. 2 is a front view of a conventional jumper device.

[Explanation of symbols]

 1 Pipe part 1A Extension part 2 Support device 3 Jumper wire 4 Yoke 5 Steel tower 6 Overhead power transmission line 7 Stretching clamp 8 Insulator series 9 Jumper spacer

Claims (1)

[Claims] 1. A jumper device comprising a pipe portion, a support device for suspending and supporting the pipe portion, and a jumper wire for supplying a current to the pipe portion, wherein both ends of the pipe portion are on the support device side. A jumper device, wherein the length of the supporting device and the jumper wire is shortened in accordance with the extension of the pipe portion.