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Alternating-current high-voltage SF6 circuit breaker and permanent-magnet operating mechanism thereof

A permanent magnet operating mechanism and circuit breaker technology, which is applied in high-voltage air circuit breakers, high-voltage/high-current switches, circuits, etc., can solve the problems of cumbersome, high precision parts processing, and complex structure, and achieve the closing and opening structure Simple, convenient production and maintenance, fast speed effect

Pending Publication Date: 2019-02-12
宁波鑫鑫鑫寅电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing SF6 circuit breakers are controlled by a spring operating mechanism. The spring operating mechanism has been used so far due to its advantages of small power supply capacity and fast closing and opening actions. However, its structure is too complicated and the processing accuracy of parts is required to be high. It also leads to cost reduction and maintenance becoming very cumbersome. Therefore, it is very important to design an operating mechanism with a simple structure and fast opening and closing speed.

Method used

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  • Alternating-current high-voltage SF6 circuit breaker and permanent-magnet operating mechanism thereof
  • Alternating-current high-voltage SF6 circuit breaker and permanent-magnet operating mechanism thereof
  • Alternating-current high-voltage SF6 circuit breaker and permanent-magnet operating mechanism thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: A permanent magnet operating mechanism of an AC high-voltage SF6 circuit breaker, such as figure 1As shown, it includes two mechanism plates 1 , and an interlock arm 2 installed between the two mechanism plates 1 , a closing mechanism 3 , a transmission rod 4 and an opening mechanism 5 .

[0047] Such as figure 1 with 2 As shown, the closing mechanism 3 includes an aluminum base 37, a static core 31, a moving core 32, a magnet 33, a movable rod 35 and an electromagnetic coil 34. The aluminum base 37 is fixed between the two mechanism plates 1 by bolts, and the static core 31 is fixed by bolts. Installed on the aluminum seat 37.

[0048] The static core 31 includes an outer static core 311 and an inner static core 312. The outer static core 311 and the inner static core 312 are both annular, and the inner static core 312 is coaxially sleeved in the outer static core 311, and the outer static core 311 and the The inner static cores 312 are all fixed on th...

Embodiment 2

[0063] Embodiment 2: a kind of AC high voltage SF6 circuit breaker, such as Image 6 with Figure 7 As shown, it includes a box body 8, a main shaft 91 assembly, multiple sets of bushing assemblies 10, and the permanent magnet operating mechanism in Embodiment 1.

[0064] Among them, such as Figure 8 As shown, the main shaft 91 assembly includes a main shaft 91 and a plurality of toggle arms 92, one end of the main shaft 91 is fixedly connected to the interlocking arm 2 in the permanent magnet operating mechanism, and the number of toggle arms 92 is the same as that of the sleeve assembly 10 The number is the same, and the toggle arm 92 is fixedly installed on the main shaft 91 by bolts.

[0065] The end of the toggle arm 92 is provided with a U-shaped opening groove, through which two toggle arms 921 are formed. The toggle arm 921 is provided with a through hole, and a hexagon socket bolt is inserted in the through hole, and the hexagon socket bolt is arranged from the ins...

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Abstract

The invention discloses an alternating-current high-voltage SF6 circuit breaker and a permanent-magnet operating mechanism thereof. The permanent-magnet operating mechanism comprises an interlocking crank arm, a closing mechanism, a transmission rod and an opening mechanism. When a closing mechanism of a permanent-magnet structure is powered and a movable core and a magnet are attracted each other, a movable rod moves towards a static core to drive the transmission rod to be swung to further drive the interlocking crank arm to rotate, closing is achieved, and the interlocking crank arm can compress an opening spring to store energy in the closing process. When reverse current is connected, a movable core and the static core are separated, force of the movable rod on the transmission rod isremoved, the opening spring releases energy, so that interlocking crank arm reversely rotates and resets, overall parts are less, and the mechanism is simple in structure. The alternating-current high-voltage SF6 circuit breaker needs small closing force, rapid closing can be achieved under the action of the permanent-magnet closing mechanism, and rapid opening can be ensured under the action ofthe opening spring in opening.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to an AC high-voltage SF6 circuit breaker and a permanent magnet operating mechanism thereof. Background technique [0002] Sulfur hexafluoride circuit breaker is a circuit breaker that uses sulfur hexafluoride (SF6) gas as the arc extinguishing medium and insulating medium, referred to as SF6 circuit breaker. It gives full play to the arc blowing effect of the airflow, the arc extinguishing chamber is small in size, simple in structure, large in breaking current, short in arcing time, no re-ignition or re-ignition in breaking capacitor or inductive current, and low overvoltage. [0003] For example, the authorized announcement number is CN204390969U, and the application date is December 25, 2014, which discloses a frame-type spring operating mechanism for SF6 circuit breakers, including a frame and a frame surface panel. Braking mechanism, opening mechanism, energy storag...

Claims

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Application Information

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IPC IPC(8): H01H33/38H01H33/50
CPCH01H33/38H01H33/50
Inventor 沈寅沈百能马益站邹守乔沈桂清应速飞苗建飞
Owner 宁波鑫鑫鑫寅电气有限公司
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