JPH1066237A - Jumper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a jumper device which can attain size reduction of a steel tower because a steel tower arm can be shortened sufficiently even in such a condition as an insulation distance L between a steel tower body and a two- split rigid pipe conductor is ensured, and which is harmonized with environment because of an appearance of simple structure. SOLUTION: A jumper device is constituted of a two-split rigid pipe conductor 10, a flexible conductor 50 which electrically connects the front end side of the two-split rigid pipe conductor 10, a flexible jumper wire 11 which electrically connects the base end sides of the two-split rigid pipe conductor 10 with overhead transmission lines 1. The front end side of the two-split rigid pipe conductor 10 is positioned at the lower part of a steel tower arm near the top part of a horizontal angle so as to be supported by a supporting insulator 60, and the base end sides of the two-split rigid pipe conductor 10 are supported by a lifting metal fitting 30 which is suspended in the vertical direction from respective yokes 4 of the front ends of a series of strain insulators.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumper device having a horizontal angle and electrically connecting overhead transmission lines fixed to a tower arm through a series of tension insulators.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional jumper device. The overhead power transmission line 1 has a horizontal angle α and is fastened to a tower arm 5 via an anchoring clamp 2, a yoke 3 and a tension insulator series 4. The jumper device is a flexible jumper wire in which one long rigid pipe conductor 10 and both ends of the one long rigid pipe conductor 10 are electrically connected to an overhead power transmission line via a retaining clamp 2. 11 is comprised. The jumper device includes the rigid pipe conductor 1
0 is supported by a supporting insulator 20 hanging down from the tower arm 5, and both ends of the rigid pipe conductor are supported by hanging brackets 30 suspended from the yoke 3 at the tip of the tension insulator series 4. Mounted on

[0003]

However, in the conventional jumper device, one long rigid pipe conductor 10 arranged below the tower arm 5 is arranged in a direction perpendicular to the extending direction of the tower arm 5. In order to do so, the tower arm 5 must be lengthened, and there is a problem that the tower becomes large. That is, a certain insulation distance L is required between the tower main body 5A and one long rigid pipe conductor 10,
In order to secure such a constant insulation distance L, the tower arm 5
Must be lengthened, which results in a large tower. Further, the conventional jumper device has a problem that it is complicated in appearance and is not suitable for environmental harmony.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and provides a jumper device which can shorten a tower arm and thus can downsize the tower and which is harmony with the environment. The jumper device has a horizontal angle and is electrically connected between overhead transmission lines fixed to a tower arm through a series of tension insulators. The jumper device is divided into two. A rigid pipe conductor, a flexible conductor electrically connected to the distal end of the rigid pipe conductor divided into two parts, and a flexible conductor electrically connected to the overhead transmission line at the base end of the rigid pipe conductor divided into two parts It consists of a jumper wire, and the tip side of the rigid pipe conductor is positioned below the tower arm near the top of the horizontal angle and supported by the supporting insulator, and the base end side of the rigid pipe conductor is connected to the yoke at the tip end of the tension insulator series. It is characterized in that supported by the lower and hanger Ri.

[0005] A rigid pipe conductor divided into two parts is used, and the distal end side of the rigid pipe conductor divided into two parts is positioned below a tower arm near the top of a horizontal angle and supported by a supporting insulator. When the end side is supported by a hanger hanging from the yoke at the tip of the tension insulator series, the rigid pipe conductor divided into two is bent by the same angle as the horizontal angle at the position of the flexible conductor. It is attached downward and in a position substantially in the same vertical plane as the tension insulator series. Therefore, the tower arm can be sufficiently shortened even when the insulation distance L between the tower main body and the rigid pipe conductor divided into two is secured. In addition, a jumper device which has a simple appearance and is in harmony with the environment can be obtained.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view of a jumper device according to the present invention, and FIG. 2 is a front view. The overhead power transmission line 1 has a horizontal angle α and is fastened to a tower arm 5 via an anchoring clamp 2, a yoke 3 and a tension insulator series 4. The jumper device includes a rigid pipe conductor 10 divided into two parts,
A flexible conductor 50 electrically connected to the distal end side of the divided rigid pipe conductor 10;
And a flexible jumper wire 11 electrically connected to the overhead power transmission line 1 via an anchoring clamp 2. In this jumper device, the distal end side of the rigid pipe conductor 10 divided into two parts is positioned below the tower arm near the top of the horizontal angle, supported by the support insulator 60, and the base end side of the rigid pipe conductor 10 divided into two parts is set. Each is supported by a suspending bracket 30 suspended vertically from the yoke 4 at the tip end of the tension insulator series.

Accordingly, the rigid pipe conductor 10 divided into two parts is bent at substantially the same angle as the horizontal angle α at the position of the flexible conductor 50, so that the rigid pipe conductor 10 is located below the tension insulator series and substantially the same vertical as the tension insulator series. It is mounted in a state where it is located in the plane.

[0008] The length of the tower arm 5 is
The length is such that an insulation distance L between A and the two divided rigid pipe conductors 10 can be secured.

A weight 70 and a gripping metal 80 are attached to the distal end of the support insulator 60, and grip the distal end of the rigid pipe conductor 10 divided into two parts by the gripping metal 80. The reason why the weight 70 is used is to prevent corona discharge between the insulators when a suspension insulator is used as the support insulator 60 and to prevent the tip of the rigid pipe conductor 10 divided into two parts from swinging. When the polymer insulator is used as the support insulator 60, the weight 70 does not need to be used because corona discharge does not occur between the insulators unlike the suspended insulator.

In addition, an insulation treatment section 90 is provided at an intermediate portion of the gripping metal piece 80 on one side of the gripping metal piece 80. As a result, the current flowing through the rigid pipe conductor 10 does not shunt to the weight 70, so that the weight 70 does not generate heat, and the potential of the weight 70 can be made the same as the potential of the rigid pipe conductor 10. This can prevent the occurrence of an arc or the like.

A hanging bracket 30 supporting the base end side of the rigid pipe conductor 10 divided into two parts is suspended vertically from the yoke 4 at the distal end of the tension insulator series. As described above, it is preferable that the base ends of the rigid pipe conductors 10 be supported by the hanging fittings 30 suspended from the yoke 4 in the vertical direction, since a tensile force can be prevented from acting on the rigid pipe conductors 10.

In the above embodiment, the case where the overhead power transmission line 1 is one, that is, a single conductor has been described.
The overhead transmission line 1 may have four conductors, six conductors, eight conductors, or the like. In this case, it is preferable to use only one rigid pipe conductor 10 divided into two as in the embodiment, from the viewpoint of environmental harmony, but two or more rigid pipe conductors may be used. Even when a plurality of rigid pipe conductors 10 divided in this way are used, each rigid pipe conductor 10 divided into two is bent at the position of the flexible conductor 50 at substantially the same angle as the horizontal angle α,
It is mounted below the tension insulator series and in a position substantially in the same vertical plane as the tension insulator series.

The supporting insulator 60 for supporting the distal end side of the rigid pipe conductor 10 divided into two parts is not a structure in which the insulator is suspended in an I-shape as in the embodiment, but a structure in which the insulator is suspended in a V-shape. It may be.

[0014]

As described above, the jumper device according to the present invention has a horizontal angle and is configured to electrically connect the overhead transmission lines fixed to the tower arm via the tension insulator series. In the apparatus, the jumper device includes a rigid pipe conductor divided into two parts, a flexible conductor electrically connecting a distal end side of the rigid pipe conductor divided into two parts, and a base end side of the rigid pipe conductor divided into two parts. A flexible jumper wire electrically connected to the overhead power transmission line, the distal end of the rigid pipe conductor being positioned below a tower arm near the top of a horizontal angle, supported by a supporting insulator, and a base end of the rigid pipe conductor. The supporting side is supported by a suspending bracket suspended from a yoke at a tip end of the tension insulator series. For this reason, the rigid pipe conductor divided into two can be mounted below the tension insulator series and in a position substantially in the same vertical plane as the tension insulator series. Therefore, even when the insulation distance L between the tower main body and the rigid pipe conductor divided into two is secured, the tower arm can be sufficiently shortened, and the tower can be reduced in size. In addition, since the external appearance has a simple structure, a jumper device that is in harmony with the environment can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a plan view of a conventional jumper device.

FIG. 4 is a front view of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Overhead transmission line 2 Yield clamp 3 Yoke 4 Tension insulator connection 5 Steel tower arm 10 Two divided rigid pipe conductors 11 Flexible jumper wire 30 Suspension fitting 50 Flexible conductor 60 Support insulator 70 Weight 80 Holding fixture 90 Insulation processing part α horizontal angle

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Tashiro Furukawa Electric Co., Ltd. 2-6-1 Marunouchi, Chiyoda-ku, Tokyo

Claims (1)

[Claims] 1. A jumper device having a horizontal angle and electrically connecting overhead power transmission lines secured to a tower arm via a tension insulator series, wherein the jumper device is a rigid pipe divided into two parts. A conductor, a flexible conductor electrically connected to the distal end of the rigid pipe conductor divided into two parts, and a flexible jumper wire electrically connected to the overhead transmission line at the base end of the rigid pipe conductor divided into two parts The rigid pipe conductor was supported by a supporting insulator with the distal end side of the rigid pipe conductor positioned below the tower arm near the top of the horizontal angle, and the base end side of the rigid pipe conductor was hung from the yoke at the distal end of the tension insulator series. A jumper device supported by hanging metal fittings.