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A circuit breaker and its overtravel elastic device

An elastic device and circuit breaker technology, applied in high-voltage air circuit breakers, circuits, high-voltage/high-current switches, etc., can solve problems such as poor bounce performance and plastic deformation of over-travel springs, and achieve a shortened bounce time and smooth overall movement. Effect

Active Publication Date: 2020-03-20
HENAN PINGGAO GENERAL ELECTRIC CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an over-travel elastic device to solve the problem of poor bounce performance due to the plastic deformation of the over-travel spring easily; also provide a circuit breaker using the over-travel elastic device

Method used

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  • A circuit breaker and its overtravel elastic device
  • A circuit breaker and its overtravel elastic device
  • A circuit breaker and its overtravel elastic device

Examples

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Effect test

Embodiment Construction

[0023] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] Specific embodiment 1 of the overtravel elastic device of the present invention, such as figure 1 As shown, the overtravel elastic device includes an outer cylinder 4, the outer cylinder 4 is provided with a pin hole 13, the upper opening of the outer cylinder 4 is screwed with an inner cylinder 2, and the inner cylinder 2 is threadedly connected to the upper opening of the outer cylinder 4. A piston 6 is sealed and installed in the inner cylinder 2. The piston 6 includes a piston rod 5. A sealing ring 1 is installed between the piston rod 5 and the inner cylinder 2. A partition 11 is arranged on the piston rod 5. The partition 11 and the inner cylinder 2 is provided with a sealing ring, the partition 11 is provided with a partition damping hole 10, the inner cylinder and the outer cylinder form a sealed inner chamber 3, and the partition divides ...

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Abstract

The invention provides a circuit breaker and an overtravel elastic device thereof, which solves the problem of poor bouncing performance due to the plastic deformation of the overtravel spring easily. The over-travel elastic device includes a cylinder body, a piston is arranged in the inner cavity of the cylinder body, and the opposite ends of the cylinder body and the piston are provided with connecting structures for corresponding connection with the crank arm and the insulating pull rod respectively, and the piston rod of the piston There is a partition on the top, and two oil chambers are formed on both sides of the partition. The partition and / or the cylinder body is provided with a damping passage connecting the two oil chambers. There is a press between the rodless side of the piston and the cylinder body disc spring. The over-travel elastic device of the present invention absorbs the rebounding force of the moving contact through the double buffering effect of the disc spring and the hydraulic oil, shortens the bouncing time of the moving contact, and reduces the bouncing of the moving contact.

Description

technical field [0001] The invention relates to a circuit breaker and an overtravel elastic device thereof. Background technique [0002] Domestic vacuum circuit breakers are equipped with overtravel springs, which can continue to apply force to the movable contacts after the movable and static contacts are in contact, so that the movable contacts have greater contact pressure and reduce the contact pressure of the movable and static contacts. The bouncing when braking, and the overtravel spring can absorb the reverse force of the static contact received by the moving contact, further reducing the bouncing time. [0003] A utility model patent with an authorization announcement date of August 22, 2012 and an authorization announcement number of CN202394799U discloses a solid-sealed vacuum circuit breaker, which includes a spring operating mechanism, a moving contact and a static contact. The moving contact is connected with an insulating pull rod, and the spring operating m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/666
CPCH01H33/666
Inventor 李腾虎杨潇芸王新杰刘晓焱王焕邵山吴林陈波李爽肖超超
Owner HENAN PINGGAO GENERAL ELECTRIC CO LTD
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