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Arc extinguish chambers of high voltage alternating current SF6 pot-type breaker

A high-voltage AC, arc-extinguishing chamber technology, applied in high-voltage air circuit breakers, high-voltage/high-current switches, circuits, etc., to achieve the effects of short parts cycle, improved safety and reliability, and strong capacitive current breaking capacity

Active Publication Date: 2012-12-19
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional high-voltage AC double-break SF6 circuit breaker with a voltage level of 363kV and above can no longer meet the needs of power grid development. Therefore, it is necessary to optimize the entire electric field of the arc extinguishing chamber of the existing circuit breaker to make the overall electric field of the arc extinguishing chamber more stable. Uniform, more reasonable structural design, higher overall technical indicators of the product, and more reliable operation

Method used

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  • Arc extinguish chambers of high voltage alternating current SF6 pot-type breaker
  • Arc extinguish chambers of high voltage alternating current SF6 pot-type breaker
  • Arc extinguish chambers of high voltage alternating current SF6 pot-type breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the arc extinguishing chamber of the high-voltage AC double-break SF6 tank circuit breaker is composed of the housing 12 that is assembled with the arc extinguishing chamber, the plum contact system 1, the static contact system 2, the capacitor assembly unit 4, and the pressure cylinder system 5. , Mechanical transmission system 8, ion capture system 10, compressed air piston assembly unit 11, intermediate contact assembly unit 6, insulation support rod 3, moving end large shield 7, static end large shield 9 and other components. The arc extinguishing chamber is a double-fracture structure, and the two sides are symmetrically distributed with the mechanical transmission system as the center. The mechanical transmission system 8 moves in the vertical direction, and the vertical movement is converted into horizontal movement through the middle arm and connecting rod of the mechanical transmission system 8, which drives the destruction The two pres...

Embodiment 2

[0037] Such as figure 2 As shown, the arc extinguishing chamber pressure cylinder system 5 is mainly composed of a piston rod 20, a pressure cylinder 21, a cylinder seat 22, a movable main contact 23, a movable arc contact 24, a nozzle seat 25, a nozzle 26, and the like. The piston rod 20 and the cylinder base 22 are connected by threads. After being installed in the press cylinder 21, the movable main contact 23 and the nozzle base 25 are connected with the cylinder base by screws and fixed on the press cylinder, and the movable arc contact 24 is fixed on the piston by threads On the rod 20, the spout 26 is fixed on the spout seat 25 by threads.

[0038] Such as figure 2 As shown, there are two processing methods for the pressure cylinder, one is to use a shaped aluminum tube for processing, and the other is to use a new process for hot extrusion. The second method is to use bar stock and heat extrusion through a vacuum extrusion welding chamber. Compression forming, with high...

Embodiment 3

[0040] Such as image 3 As shown, the static contact system 2 of the circuit breaker interrupter is mainly composed of a shielding cover 13, a static main contact 14, a conductive rod 15, a static arc contact seat 16, a connecting flange 17, a flange 18, and a static arc contact 19 , Static end large shielding cover 9 and other components. The flange 18 and the connecting flange 17 are connected by screws, the shielding cover 13 and the static main contact 14 are connected with the connecting flange 17 through screws and positioning buckles, and the static arc contact 19 is connected with the static arc contact seat 16 through threads. It is then fixed on the connecting flange 17 by screws, and the conductive plate 15 and the large static end shield 9 are connected with the flange 18 by screws.

[0041] Such as image 3 As shown, the shielding cover 13 is welded by two parts, and the shield and flange are welded by integral spinning. The processing cycle is short, the cost is low...

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Abstract

The invention discloses arc extinguish chambers of a high voltage alternating current SF6 pot-type breaker. The invention is characterized in that an arc extinguish chamber system comprises a shell with the arc extinguish chambers, plum blossom contact systems, fixed contact systems, capacitor assembling units, air cylinder systems, a mechanical drive system, ion capturing systems, compressed airpiston assembling units, intermediate contact assembling units, insulation supporting bars, moving end large shields and fixed end large shields; the arc extinguish chambers are of double-break structure and are symmetrically distributed, with the mechanical drive system as the center; the middle mechanical drive system moves along the vertical direction; and vertical movement of the mechanical drive system is transformed to horizontal movement through crankarms and connecting rods in the mechanical drive system to drive the two air cylinder systems of the arc extinguish chambers to move horizontally to switch off and switch on the switchgear. Through promoting the technology of the integral arc extinguish chamber of the breaker, the arc extinguish chambers have more uniform electrical field, high insulation level, stronger breaking capability and high current-carrying capability and is safer to operate.

Description

Technical field [0001] The invention relates to a power switchgear, which is mainly used for the control and protection of the power system, and more specifically to the arc extinguishing chamber of a high-voltage AC double-break SF6 circuit breaker with a voltage level of 363kV and above. Background technique [0002] With the rapid development and gradual improvement of the national grid construction, the power system has higher and higher requirements for the reliability and stability of switchgear. Traditional high-voltage AC double-break SF6 circuit breakers with voltage levels of 363kV and above can no longer meet the needs of power grid development. Therefore, it is necessary to optimize the design of the entire electric field of the arc extinguishing chamber of the existing circuit breaker to make the overall electric field of the arc extinguishing chamber more Uniformity, more reasonable structure design, higher overall product technical indicators, and more reliable ope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/91
Inventor 张猛张震锋杨夙峰阮艳丽史俊
Owner CHINA XD ELECTRIC CO LTD