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A vacuum isolating load switch

A load switch and vacuum isolation technology, applied in electrical switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., can solve the problems of causing danger, the insulation distance of the isolation knife does not reach a safe value, breakdown, etc., to ensure safety. performance effect

Active Publication Date: 2020-04-03
ZHEJIANG ZIGUANG ELECTRIC APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above scheme realizes the protection of the spring and improves the stability of the fixed knife switch, but it also has the following problems: after the end of the isolating knife is separated from the second insulating cylinder by rotating the isolating knife, a fracture is formed. At the moment when the two insulation cylinders are separated, the arc extinguishing chamber is not completely extinguished. At this time, the insulation distance between the end of the isolation knife and the second insulation cylinder does not reach a safe value. Under high voltage, the end of the isolation knife and the second insulation cylinder Breakdown may occur between insulating cylinders, causing danger

Method used

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  • A vacuum isolating load switch
  • A vacuum isolating load switch
  • A vacuum isolating load switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the vacuum isolation load switch includes several groups of isolation knife assemblies 1, each group of isolation knife assembly 1 includes isolation knife 1a, first insulating support 1b, second insulating support 1c, insulating top rod 1d and base 1e, each group The isolation knife assembly 1 is connected with an arc extinguishing chamber fast arc extinguishing transmission interlocking mechanism 2 and an arc extinguishing chamber 3. The first insulating support 1b, the second insulating support 1c and the insulating top rod 1d are all mounted on the base 1e, wherein the top of the first insulating support 1b is fixedly connected with an input terminal board 5, and the input terminal board 5 is partially raised to form a contact 5a , The first end of the isolating knife 1a is provided with a contact groove 1a1 that can be contacted and connected with the contact 5a; the arc extinguishing chamber fast arc extinguishing transmission interlocking...

Embodiment 2

[0038] Such as Figure 8 As shown, in this embodiment, the structure of the vacuum isolation load switch is basically the same as that of the first embodiment. The difference is that the crank arm assembly 2h includes a crank arm body 2h5, and the upper part of the crank arm body 2h5 is on the two opening rollers 2d. At the end, the middle part of the arm body 2h5 is hinged on the arm shaft 2i, the side wall of the lower part of the arm body 2h5 abuts against the outer edge of the cam 2g, the limit notch 2g1 on the cam 2g is a concave arc-shaped notch, The end surface of the lower part of the arm body 2h5 is an arc-shaped surface, and the arc-shaped surface can be inserted into the arc-shaped notch and cooperate with the arc-shaped notch when the isolating knife 1a rotates to a preset angle.

Embodiment 3

[0040] In this embodiment, the structure of the vacuum isolation load switch is basically the same as that of the first embodiment. The difference is: the first end of the arc ignition rod 4 is a plug, and the top of the first insulating pillar 1b is provided with a socket, and the plug and the socket are tightly matched , And when the pulling force on the first end of the arc ignition rod 4 exceeds the pressing force of the socket on the plug, the plug can be released from the socket. With the mating connection of the plug and the socket, the connection and disconnection between the arc ignition rod 4 and the first insulating pillar 1b are very convenient and quick.

[0041] The working principle of the vacuum isolation load switch of the present invention is as follows: the arc extinguishing chamber 3 can be opened and closed by operating the rotation angle of the isolating knife 1a, and the isolating knife 1a is changed from horizontal to the completion of the opening of the ar...

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Abstract

The invention, which belongs to the technical field of circuit breakers, provides a vacuum isolating load switch so that a problem that breakdown occurs between an isolating switch and an insulating cylinder of the exiting vacuum isolating load switch easily can be solved. The vacuum isolating load switch is composed of a plurality of groups of isolating switch assemblies; each group of isolatingswitch assemblies includes an isolating switch, a first insulating post and a second insulating post; and a first end of the isolating switch is connected with the top of the first insulating post movably and a second end of the isolating switch is hinged to the top of the second insulating post. The isolating switch assemblies also include arc strike rods with adjustable lengths; first ends of the arc strike rods are hinged to the isolating switches; second ends of the arc strike rods are connected to the tops of the first insulating posts movably; and the second ends of the arc strike rods can be disconnected with the tops of the first insulating posts completely after the isolating switches rotate around the tops of the second insulating posts at preset angles. Therefore, the breakdownphenomenon is avoided and the safety is improved.

Description

Technical field [0001] The invention belongs to the technical field of circuit breakers and relates to a vacuum isolation load switch. Background technique [0002] The working principle of the vacuum isolation load switch is similar to that of a circuit breaker. Generally, it is equipped with a simple arc extinguishing device, but its structure is relatively simple. When opening, the main shaft rotates in sequence under the action of the opening spring. On the one hand, the piston is moved upward by the crank slider mechanism to compress the gas; on the other hand, the transmission system composed of two sets of four-bar linkage makes the main brake The knife is opened first, and then the arc extinguishing knife is pushed to open the arc contact, and the compressed air in the cylinder blows out the arc through the nozzle. When closing, through the main shaft and transmission system, the main switch and the arc extinguishing switch are rotated clockwise at the same time, the arc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/666H01H33/664
CPCH01H33/664H01H33/666
Inventor 周鹤铭
Owner ZHEJIANG ZIGUANG ELECTRIC APPLIANCE
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