JPH09213177A - High voltage air break switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower cost by reducing welding work man-hour. SOLUTION: Self-standing legs 4 are provided at the four corner portions of the bottom face of a high voltage air break switch main body 1 so that the high voltage air break switch main body 1 can maintain a stable attitude when the same is placed on a floor. One of the self-standing legs 4 is used also as an earth terminal 5, the same is a square column having a square cross section, and the top face is welded to one place of the bottom face corner portion of the high voltage air break switch main body 1. An earth wire fitting hole 6 is provided in one place of the side face of the earth terminal 5, and a screw hole 7 the center axis of which crosses orthogonally to the earth wire fitting hole 6 and which communicates with the same is screwing provided on the other side. By screwing a fixing bolt 8 into the screw hole 7, the falling- out of the earth wire inserted into the earth wire fitting hole 6 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure air switch having free standing legs for ground mounting used in overhead power distribution lines.

[0002]

2. Description of the Related Art In a high-pressure air switch, the grounding of the outer casing forming the outer shell thereof is important for safety and must be ensured. When grounding, for example, a single wire having a diameter of 2.6 mm or a ground wire made of a twisted wire having a cross-sectional area of 22 mm ² is used. In order to connect this ground wire to the high-pressure air switch, the outer box of the high-pressure air switch must be provided with a ground terminal that can be connected reliably and easily.

Conventionally, the grounding terminals are individually designed as dedicated parts, and are attached to the outer casing of the high-pressure air switch by welding. For this reason, welding work must be performed using a positioning jig and a welding jig. The time for this work, strain removal after welding of the outer box after welding, correction of outer diameter dimension, etc. Therefore, the number of man-hours for manufacturing and mounting the conventional high-pressure air switch has been increased.

Further, in order to fix the end portion of the ground wire to the ground terminal, a hole slightly larger than the outer diameter of the ground wire and a push screw are screwed in the hole in a direction perpendicular to the hole. Although it is necessary to machine the screw holes of the above, the conventional ground terminal is a cylindrical member, and the upper surface is welded to the outer box. The grounding terminal is attached to the switch outer box in the high-voltage device near the handle for opening and closing.

[0005]

In the ground terminal of the high-pressure air switch as described above, it is effective to reduce as many welding parts as possible in order to prevent an increase in the number of work steps, which is a cost reduction. Also leads to

Further, the processing for the boss-shaped ground terminal itself is
Since the side surface of the cylinder, that is, the curved surface is to be perforated, there is a problem that the working operation is difficult to perform.

Further, in the work of installing the grounding wire when the high pressure air switch is installed, since the grounding terminal is located near the handle for performing the opening / closing operation, the grounding wire is installed around the handle. There was trouble in work such as getting caught.

[0008]

In order to solve the above-mentioned problems, the invention described in claim 1 is used for an overhead power distribution line, and has a high-pressure air opening / closing with self-standing legs for mounting on the ground. In the container, one of the legs for self-supporting is shared with the ground terminal.

According to a second aspect of the present invention, in the high-pressure air switch according to the first aspect, the working surface of the self-standing leg shared with the ground terminal is flat.

According to a third aspect of the present invention, in the high-pressure air switch according to the first or second aspect, the self-standing leg shared with the ground terminal is provided at the bottom of the high-pressure air switch body. It is characterized by being

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view showing an embodiment of the present invention. The high pressure air switch main body 1 having a cubic box shape and an opening / closing mechanism incorporated therein is provided with a rod-shaped handle 2 at one position on the side surface, and by moving in the direction of an arrow 3, the internal circuit is opened. It can be cut.

At three places of the four corners of the lower surface of the main body of the high pressure air switch 1, self-standing legs 4 obtained by cutting a cylindrical round bar to a predetermined length are welded and provided. A stable posture can be maintained when the vessel 1 is placed on the floor.
The remaining one free-standing leg is also used as a grounding terminal 5 for grounding. This grounding terminal 5 has a structure in which a square bar having a square cross section is subjected to drilling and then welded. Has become.

FIG. 2 is an enlarged perspective view of the ground terminal. The ground terminal 5 has a structure in which its upper surface is welded to one corner of the lower surface of the main body 1 of the high-pressure air switch 1. Further, a ground wire mounting hole 6 for inserting an end portion of a ground wire 14 (FIG. 3), which will be described later, is provided at one location on the side surface, and the center axis of the hole is formed on the other side surface as the ground wire mounting hole 6. Screw holes 7 are provided so that they intersect at right angles and the holes penetrate each other. By screwing the fixing bolt 8 into the screw hole 7, the ground wire mounting hole 6
The end portion of the ground wire 14 inserted in is fixed so as to prevent it from coming off.

FIG. 3 is a view showing a high pressure air switch in a mounted state. An electric pole 11 erected on the ground 10 is provided with a arm 12 on the upper portion thereof so as to intersect the electric pole 11 at a right angle. The arm 12 has a plurality of overhead distribution lines 13 and a main body of a high-voltage air switch. 1 is suspended.

The other end of the ground wire 14 connected to the ground terminal 5 is connected to the ground electrode 15 buried in the ground 10 so as to be grounded.

In the high-pressure air switch according to the present embodiment, one of the self-standing legs 4 is shared, but other than this part, a device that facilitates drilling may be shared with the ground terminal. Further, in the present embodiment, the self-supporting legs 4 other than the ground terminal 5 are columnar round bars, but needless to say, they may be square bars having a square cross section like the ground terminal 5.

[0017]

As described above, according to the present invention, since the self-supporting leg and the ground terminal are commonly used, the number of welding parts is reduced by one, which contributes to the cost reduction by reducing the man-hours for welding work.

Further, since the portion of the self-standing leg that is shared with the grounding terminal is formed by a flat surface, the speed of the drilling is increased, which contributes to cost reduction by reducing the processing time.

Furthermore, since the grounding terminal serves as a self-supporting leg of the high-pressure air switch, a grounding wire is attached to the bottom of the main body of the high-pressure air switch. The work of installing the grounding wire can be done smoothly when the high pressure air switch is installed, and the work time can be shortened and accidents can be prevented.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a ground terminal.

FIG. 3 is a view showing a high-pressure air switch in a mounted state.

[Explanation of symbols]

 1 High-pressure air switch main body 2 Handle 3 Arrow 4 Self-supporting leg 5 Grounding terminal 6 Grounding wire mounting hole 7 Screw hole 8 Fixing bolt 10 Ground 11 Power pole 12 Bracket 13 Overhead distribution wire 14 Grounding wire 15 Grounding pole

Claims (3)

[Claims] 1. A high-voltage air switch used for an overhead power distribution line and having legs for standing on the ground, wherein one of the legs for standing is shared with a ground terminal. Air switch. 2. The high-pressure air switch according to claim 1, wherein the self-standing leg shared with the ground terminal has a flat processing surface. 3. The high-pressure air switch according to claim 1 or 2, wherein the self-supporting leg shared with the ground terminal is provided at the bottom of the high-pressure air switch body. High pressure air switch.