JP2001157347A - Metal fitting for jumper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal fitting for a jumper device which has an earth metal fitting function on the jumper horn thereof and can improve the attachment workability and economy. SOLUTION: A metal rod or pipe with a circular cross-section is bent into a semi-circular shape and both its ends are fixed to a spacer for the horizontal elements of a jumper to form the jumper horn consisting of the metal rod or pipe attached vertically to the spacer. A metal rod or a pipe with a circular cross-section is bent into a square shape and additionally attached horizontally to the jumper horn. It is recommended to attach the both the ends of the square shaped metal rod or pipe integrally to the side parts of the semi-circular metal rod or pipe by soldering, etc.

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 an overhead transmission line, and more particularly to a jumper device of a prefabricated jumper device having a jumper horn and a grounding metal in a pipe.

[0002]

2. Description of the Related Art Insulation coordination of an overhead power transmission line has been performed by an insulator device for anchoring a tension tower;

In a jumper device used to connect transmission lines having different diameters in the tension tower, a suspended prefabricated jumper device using a horizontal member and a pipe between jumper wires has been put into practical use. Since this is fixed in shape, a horn for insulation coordination is configured in a jumper device. (The inside of the jumper is hardly affected by snow cover.) FIG. 3 shows an example of the horizontal member of the suspension type jumper device; a jumper horn 2 is provided at the center of the pipe, and the ground side attached to the lower surface of the tower arm. Insulation coordination is achieved with a horn (impulse horn) 1 '. Therefore, when a large current such as lightning flows, discharge is caused between the facing horns 1 and 1 'to escape the large current and prevent equipment damage.

[0004] On the other hand, at the time of a power outage, the grounding work needs to be performed because electric charges remain inside the conductor even after the power outage. When the conductor is grounded by attaching the grounding rod to the jumper device, a metal fitting for attaching the grounding rod to the jumper device, that is, a grounding metal, as shown in FIG. Attached.

[0005] As described above, the jumper horn and the grounding bracket attached to the prefabricated jumper device have different functions, and have different structures (shapes) as described later, so that they are separately mounted. .

As shown in FIG. 4, the jumper horn 2 is formed by bending a metal rod or tube 3 having a round cross section into a semicircular shape and fixing both ends thereof to a jumper-side horizontal member; In this embodiment, a metal rod or tube 3 is vertically mounted on the upper surface 4.

On the other hand, as shown in FIG. 5, the grounding fitting 1 is formed by processing a metal rod or tube 5 having a round cross section into a square shape, and fixing both ends to a jumper-side horizontal member; In this embodiment, a metal rod or a tube 5 is obliquely mounted on the spacer 4.

[0008]

As described above, in the conventional prefabricated jumper device, the jumper horn and the grounding bracket are separately mounted on a horizontal member of the jumper device; pipes. It is very troublesome.

Also, by separately mounting the brackets as described above, the jumper-side horizontal member;
This is necessary, and increases the number of parts, which is uneconomical.

SUMMARY OF THE INVENTION An object of the present invention is to provide a metal fitting for a jumper device having a function of a grounding metal fitting on a jumper horn to improve mounting workability and economy.

[0011]

SUMMARY OF THE INVENTION A metal fitting for a jumper device provided by the present invention is obtained by bending a metal rod or tube having a round cross section into a semicircular shape and fixing both ends to spacers relating to a horizontal member of the jumper. Then, add a metal rod or tube with a round cross section processed into a square shape horizontally to the jumper horn where the metal rod or tube is vertically mounted on the spacer, and attach the square metal rod or tube. It functions as a grounding fitting so that a spacer for the grounding fitting can be omitted.

Preferably, both ends of the square metal rod or tube are integrated with the side surface of the semicircular metal rod or tube by brazing or the like.

[0013]

FIG. 1 shows an embodiment of a metal fitting for a jumper device according to the present invention.

The metal fitting for the jumper device of this embodiment is for a horizontal member of a suspension type prefabricated jumper device; an aluminum pipe. A metal rod or tube 3 having a round cross section is bent into a semicircular shape and both ends are bent. By fixing to a spacer 4 of an aluminum pipe, a jumper horn in which a semicircular metal rod or tube 3 is vertically mounted on the spacer 4 is formed.

Then, a metal rod or tube 6 having a round cross section processed into a square shape (rectangular shape) is additionally attached horizontally to the jumper horn; The rod or tube 6 functions as a grounding fitting.

The above-mentioned horizontal mounting is achieved by integrating the square metal rod or tube 6 with the ends of the semicircular metal rod or tube 3 by brazing or the like.

According to the metal fitting for the jumper device of this embodiment constructed as described above, the top of the jumper horn 3 maintains the function as the horn, and the insulation is coordinated with the impulse horn on the tower side. It is possible.

When repairing overhead power transmission lines, grounding must be performed because electrification remains inside the conductors even after a power failure. FIG. 2 shows a state in which the metal fitting of this embodiment attached to the aluminum pipe of the suspension type prefabricated jumper device is grounded from the tower side arm with the grounding rod 8, and is attached to the tip of the grounding rod 8. The grounding clamp 7 to be gripped by the square metal rod or tube 6
The grounding is performed via a grounding cable having one end connected to the grounding clamp 7 and the other end grounded to a steel tower.

As described above, by using the metal fitting of this embodiment, the grounding metal part is attached to the jumper horn, and it is possible to omit the spacer for the grounding metal. The two spacers, the jumper horn and the grounding bracket, which have been used, need only be one, and the mounting workability can be improved. Further, since only one spacer is required on the aluminum pipe as described above, the cost of the jumper device can be reduced.

[0020]

As described above, according to the present invention, there is provided an object of providing a jumper device metal fitting having a function of grounding metal fitting on a jumper horn to improve mounting workability and economy. The objectives can be achieved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a jumper device fitting according to the present invention, in which (a) is a partially sectional front view, and (b) is a side view.

FIG. 2 is an explanatory view showing a working example of a jumper device fitting in FIG.

FIG. 3 is an explanatory diagram showing a mounting state of a pipe-type prefabricated jumper device, a jumper horn, and a grounding bracket.

4A and 4B show an example of a conventional jumper horn, wherein FIG. 4A is a partially sectional front view, and FIG. 4B is a side view.

FIG. 5 shows an example of a conventional grounding bracket, wherein (a) is a plan view,
(B) is a partially sectional front view, and (C) is a side view.

[Explanation of symbols]

 3 semicircular metal rod or tube; jumper horn 4 aluminum pipe spacer 6 square metal rod or pipe; grounding metal part 7 grounding clamp 8 grounding rod

Claims (2)

[Claims] 1. A metal rod or tube having a round cross section is bent into a semicircle shape and both ends are fixed to a spacer relating to a horizontal member of a jumper, and the metal rod or tube is vertically mounted on the spacer. A metal fitting for a jumper device, wherein a metal rod or tube having a round cross section processed into a square shape is additionally attached to the jumper horn in a horizontal direction. 2. A metal rod or tube having a rectangular shape, wherein both ends of the metal rod or tube are integrated with a side surface of the metal rod or tube having a semicircular shape.
Hardware for the jumper device described.