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a circuit breaker

A circuit breaker and housing technology, applied in the field of circuit breakers, can solve the problems of insufficient safety of circuit breakers

Active Publication Date: 2021-09-10
宁波公牛低压电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a circuit breaker, which aims to solve the problem of insufficient safety of the existing circuit breaker

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as Figure 1 to Figure 10 Shown is a schematic structural diagram of the circuit breaker provided by the embodiment of the present invention.

[0030] Please check Figure 1 to Figure 10 The circuit breaker provided by the present invention includes a housing 20, an operating mechanism 30 disposed in the housing 20, an arc extinguishing mechanism 40, and an overload protection mechanism 50, wherein the operating mechanism 30 includes a static The contact 31, and the moving contact 32 that is movably arranged in the housing 20 corresponding to the static contact 31; the arc extinguishing mechanism 40 includes an arc extinguishing chamber 41, and an arc extinguishing grid set in the arc extinguishing chamber 41 Group 42, running arc 43, and the arc strike plate 44 that is a tip near the end of the moving contact 32; the overload protection mechanism 50 includes a bimetal 51 that is matched with the moving contact 32 at one end, and is connected with the bimetal 51 a...

Embodiment 2

[0041] Such as Figure 1 to Figure 10 As shown, this embodiment is a more preferred embodiment on the basis of Embodiment 1. In this embodiment, its overload protection mechanism 50 also includes an adjustment screw 53, wherein the adjustment screw 53 is located between the bimetal 51 and the terminal 70 is connected to the housing 20 at one end, and the adjusting screw 53 is located on the side of the bimetal 51 away from the torsion spring 521. At this time, the two sides of the bimetal 51 are connected with the torsion spring 521 and the adjusting screw 53 respectively. Control the screwing in and out of the adjusting screw 53 on one side of the bimetal 51, so that the position of the bimetal 51 can be adjusted, and at the same time, the torsion spring 521 is arranged on the other side of the bimetal 51, so that after thermal adjustment The pressure provided by the torsion spring 521 of the bimetal 51 can always keep the same position, avoiding instability after long-term u...

Embodiment 3

[0050] Such as Figure 1 to Figure 10 As shown, this embodiment is a more preferred embodiment based on the second embodiment. In this embodiment, the side of the arc extinguishing grid group 42 away from the arc runway 43 is provided with an exhaust channel 45, wherein the exhaust The channel 45 includes a first exhaust chamber 451 that communicates with the arc extinguishing chamber 41, a second exhaust chamber 452 connected to the end of the first exhaust chamber 451 away from the arc extinguishing chamber 41, and a second exhaust chamber 452 that passes through the shell. The exhaust port 453 on the side wall of the body 20, wherein the first exhaust chamber 451 and the second exhaust chamber 452 are separated by a partition plate, and the exhaust port 453 is a through hole provided on the side wall of the housing 20, And the exhaust port 453 is set on the side facing the second exhaust chamber 452, wherein, after the arc extinguishing grid group 42 in the arc extinguishin...

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Abstract

The present invention is applicable to the technical field of electrical equipment, and provides a circuit breaker, which includes a housing, an operating mechanism disposed inside the housing, an arc extinguishing mechanism, and an overload protection mechanism; the operating mechanism includes a static contact fixed in the housing, And the moving contact corresponding to the static contact is arranged in the shell; the arc extinguishing mechanism includes an arc extinguishing chamber, an arc extinguishing grid set in the arc extinguishing chamber, an arc running track, and a tip near the end of the moving contact. The arc strike plate; the overload protection mechanism includes a bimetallic piece with one end matched with the moving contact, and an arc strike device which is in conflict with the bimetal piece and the arc strike plate respectively. The circuit breaker provided by the invention solves the problem of insufficient safety of the existing circuit breaker.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a circuit breaker. Background technique [0002] AC / DC overcurrent protective circuit breaker (MCB) used in household and similar occasions, MCB is mainly used to connect, carry and break the current under normal circuit conditions, and can also connect and carry under abnormal circuit (such as short circuit) A mechanical switch for a certain time and breaking current. When the circuit breaker is broken under short-circuit conditions, high-energy arcs will be generated, which may damage the circuit breaker or threaten personal safety. Therefore, a circuit breaker with better quality needs to extinguish the arc quickly and efficiently, so as to improve the safety and service life of the circuit breaker under fault conditions. [0003] Existing circuit breakers on the market all use arc extinguishing chambers for arc extinguishing, but for small circuit b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/66H01H33/662H01H33/664
CPCH01H33/66H01H33/662H01H33/664
Inventor 林昌奎
Owner 宁波公牛低压电气有限公司
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