Cyclone type nozzle high-pressure blowing circuit breakers with groove

A circuit breaker and high-pressure air technology, which is applied in high-voltage air circuit breakers, high-voltage/high-current switches, circuits, etc., can solve the problems of difficult arc blowing methods, which are not conducive to greatly improving the resistance to electric field breakdown between contacts, etc. It achieves the effect of convenient implementation, simple structure and improved breaking capacity

Inactive Publication Date: 2008-04-16
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to continue to increase the breaking capacity of the circuit breaker, the traditional arc blowing method will have great difficulties, which is not conducive to greatly improving the resistance to electric field breakdown between contacts

Method used

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  • Cyclone type nozzle high-pressure blowing circuit breakers with groove
  • Cyclone type nozzle high-pressure blowing circuit breakers with groove

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Example 1: Arrange spiral grooves evenly along the axial direction on the inner surface of the spout, as shown in Figure 4.

example 2

[0017] Example 2: Arrange spiral grooves evenly along the axial direction on the outer surface of the moving arc contact housing, as shown in Figure 5.

example 3

[0018] Example 3: Arrange spiral grooves evenly along the axial direction on the inner surface of the spout and the outer surface of the moving arc contact cover at the same time, as shown in Figure 7.

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PUM

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Abstract

The invention discloses an air-swirl type spout high-voltage gas-blast circuit breaker with grooves, belonging to the electrical switch field. The invention comprises a piston, an air cylinder, movable main contacts, movable arc contacts, stationary main contacts, stationary arc contacts, a cover for the moveable arc contacts and a spout. The invention is characterized in that spiral grooves are evenly arranged axially in an air flow channel formed by the spout and the cover for the movable arc contacts, or on the inner surface of the spout, or on the outer surface of the cover for the movable arc contacts, or on the inner surface of the spout and the outer surface of the cover for the movable arc contacts , so an air swirl area is formed, and the arc-extinguishing ability and the breaking capacity of the gas-blast circuit breaker are enhanced.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a circuit breaker in which grooves are added to the wall surface of the gas channel upstream of the nozzle to cause the arc blowing gas to automatically generate rotational movement. Background technique [0002] High-voltage circuit breakers mainly include oil circuit breakers and air-blown circuit breakers. Oil circuit breakers tend to be eliminated, and air-blown circuit breakers are divided into compressed air circuit breakers and self-powered circuit breakers according to the gas generation method. When the air blowing circuit breaker breaks the line, on the one hand, the contacts connected by the circuit breaker are separated, and at the same time, the high-pressure gas generated by the cylinder is required to extinguish the arc generated between the dynamic and static contacts, and improve the electric field resistance between the dynamic and static contacts. Breakdown ability to achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/88H01H33/91
Inventor 曹云东刘晓明侯春光王尔智李静
Owner SHENYANG POLYTECHNIC UNIV
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