CN110993418A

CN110993418A - Isolating switch

Info

Publication number: CN110993418A
Application number: CN201911285874.5A
Authority: CN
Inventors: 卢智强; 李敢辉; 易华泽; 范元尚; 黄锦龙; 陈娟; 常怡东; 陈伟华
Original assignee: Guangdong Power Grid Co Ltd; Foshan Power Supply Bureau of Guangdong Power Grid Corp
Current assignee: Guangdong Power Grid Co Ltd; Foshan Power Supply Bureau of Guangdong Power Grid Corp
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-04-10

Abstract

The invention discloses an isolating switch which is arranged on an insulator and comprises a moving contact, a static contact and a disconnecting link, wherein one end of the disconnecting link is movably connected with the insulator, the other end of the disconnecting link is fixedly connected with the moving contact, the static contact is fixed on the other insulator, the moving contact is provided with n grooves, the static contact is provided with m grooves, the grooves of the moving contact and the grooves of the static contact are arranged in a staggered mode, and the moving contact and the static contact can be mutually occluded through the grooves. The contact area between the moving contact and the static contact is increased through the groove, so that the passing current amount can be increased doubly under the condition of the same size, or the contact part of the disconnecting switch of the isolating switch generates less heat under the condition of the same passing current.

Description

Isolating switch

Technical Field

The invention relates to the field of power grid equipment, in particular to an isolating switch.

Background

At present, contact areas of fixed contacts and blades of isolating switches of various types in a power grid are too small, and some isolating switches are overloaded. If the contact area between the blade and the static contact is too small due to improper force application in the process of electrically driving or closing the switch in the operation process, the problem that the contact part is heated and burnt is caused.

Disclosure of Invention

The invention provides a disconnecting switch, which can allow larger current to pass through during operation.

An isolating switch is installed on an insulator and comprises a moving contact, a static contact and a disconnecting link, wherein one end of the disconnecting link is movably connected with an insulator, the other end of the disconnecting link is fixedly connected with the moving contact, the static contact is fixed on another insulator, the moving contact is provided with n grooves, the static contact is provided with m grooves, the grooves of the moving contact and the grooves of the static contact are arranged in a staggered mode, and the moving contact and the static contact can be connected in a clamped mode through the grooves.

In the above scheme, through the arrangement of the groove, the moving contact and the static contact are both of a multi-contact structure, the contact area of the isolating switch is increased, the conductive area is increased, the heating and burning condition of the contact part of the isolating switch is reduced, and the interface part of the moving contact and the static contact can achieve larger current passing in operation.

Preferably, one end of the knife switch is hinged with an insulator.

Preferably, the moving contact is made of a conductive material.

Preferably, the static contact is made of a conductive material.

Preferably, the knife switch is made of a conductive material.

Preferably, the moving contact is provided with n grooves, and the static contact is provided with m grooves, wherein n is m-1.

Preferably, n is 1, m is 2, the movable contact is provided with a concave structure, in the closing process of the switch, the contact area of the moving contact and the stationary contact is increased by one time, the current which is increased by one time passes through the movable contact and the stationary contact, or the purpose that the contact part of the isolating disconnecting link generates less heat under the condition that the same current passes through the movable contact and the stationary contact is provided with an E-shaped structure, the appearance and the size of the stationary contact are matched with the contact surface of the movable contact, and the stationary contact is clamped by the size of the stationary contact to achieve high contact, so that the resistance of the joint part is reduced, and the current conduction rate is improved.

Preferably, the direction of the moving contact groove is consistent with the length direction of the disconnecting link, and the direction of the static contact groove is perpendicular to the insulator.

Preferably, the depth of the groove of the static contact is not less than the height of the movable contact

Preferably, the width of the moving contact groove is equal to the distance between two grooves of the fixed contact.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that:

the contact area between the moving contact and the static contact is increased through the groove, so that the passing current amount can be increased doubly under the condition of the same size, or the contact part of the disconnecting switch of the isolating switch generates less heat under the condition of the same passing current.

Drawings

Fig. 1 is a schematic structural diagram of an isolation switch in the embodiment.

Fig. 2 is a schematic structural diagram of a fixed contact in an embodiment.

Fig. 3 is a schematic view of the movable contact structure in the embodiment.

In the figure, 1 is an insulator, 2 is a disconnecting link, 3 is a moving contact, 31 is a moving contact groove, 4 is a fixed contact, and 41 is a fixed contact groove.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent;

for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;

it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.

Example 1

The embodiment discloses an isolating switch, which is installed on an insulator, and as shown in fig. 1, the isolating switch comprises a moving contact 3, a static contact 4 and a disconnecting link 2, wherein one end of the disconnecting link 2 is movably connected with an insulator, the other end of the disconnecting link 2 is fixedly connected with the moving contact 3, the static contact 4 is fixed on another insulator, the moving contact 3 is provided with n grooves, the static contact 4 is provided with m grooves, the grooves of the moving contact 3 and the moving contact grooves 41 are arranged in a staggered manner, and the moving contact 3 and the static contact 4 can be mutually engaged through the grooves.

One end of the knife switch 2 is hinged with an insulator.

The moving contact 3 is made of a conductive material.

The static contact 4 is made of a conductive material.

The knife switch 2 is made of conductive materials.

The moving contact 3 is provided with n grooves, and the static contact 4 is provided with m grooves, wherein n is m-1.

As shown in fig. 2 and 3, n is 1, and m is 2.

The direction of the movable contact groove 31 is consistent with the length direction of the disconnecting link 2, and the direction of the movable contact groove 41 is perpendicular to the insulator.

The depth of the static contact groove 41 is not less than the height of the movable contact 3

The width of the moving contact groove 31 is equal to the distance between the two grooves of the fixed contact 4.

The same or similar reference numerals correspond to the same or similar parts;

the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;

it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An isolating switch is installed on an insulator and is characterized by comprising a moving contact, a static contact and a disconnecting link, wherein one end of the disconnecting link is movably connected to the insulator, the other end of the disconnecting link is fixedly connected with the moving contact, the static contact is fixed to the other insulator, the moving contact is provided with n grooves, the static contact is provided with m grooves, the grooves of the moving contact and the grooves of the static contact are arranged in a staggered mode, and the moving contact and the static contact can be clamped through the grooves.

2. The isolating switch of claim 1, wherein one end of said knife switch is hinged to an insulator.

3. The isolating switch of claim 1, wherein the movable contact is made of a conductive material.

4. The isolating switch of claim 1, wherein the stationary contact is made of a conductive material.

5. The isolation switch of claim 1, wherein the knife switch is made of a conductive material.

6. The isolating switch according to any one of claims 1 to 5, wherein the movable contact is provided with n grooves and the stationary contact is provided with m grooves, wherein n is m-1.

7. The disconnector according to claim 6, wherein n-1 and m-2.

8. The isolating switch of claim 7, wherein the moving contact groove is oriented in the same direction as the length direction of the disconnecting link, and the stationary contact groove is oriented perpendicular to the insulator.

9. The isolating switch of claim 8, wherein the depth of the groove of the stationary contact is not less than the height of the movable contact.

10. The isolating switch of claim 9, wherein the width of the movable contact groove is equal to the distance between two grooves of the stationary contact.