A permanent magnet power-assisted double-terminal vacuum insulated grounding switch

Abstract

The invention discloses a permanent magnet power-assisted double-ended vacuum insulation earthing switch. The permanent magnet power-assisted double-ended vacuum insulation earthing switch comprises apositioning mounting plate, a mounting support, an auxiliary contact assembly, a synchronous connecting plate, an insulating pull rod, a substrate plate, a contact spring, a soft connecting line, a vacuum switch tube, a linear bearing, a rack shaft, an insulating pole, a double-thread screw, a screwed plug, a connecting rod, a gear shaft and a permanent magnet chuck, wherein the rack shaft and the gear shaft are mounted on the substrate plate through the mounting support, the positioning mounting plate and the linear bearing; the permanent magnet chuck and the auxiliary contact assembly are arranged between the substrate plate and the synchronous connecting plate; the end of the insulating pole is fixed on the substrate while the vacuum switch tube is mounted inside the insulating pole; and a vacuum degree monitoring sensor is preinstalled at the static end of the vacuum switch tube. The vacuum insulation type technology is reliable, a high-voltage fracture is closed, the journey is compact, the structure is flexible and convenient in overall arrangement, the mechanism is smart, simple and labor-saving, and the mechanical property matched thinking is novel.

Description

technical field [0001] The invention relates to the vehicle-mounted high-voltage electrical appliance technology of 25kV main line, in particular to a permanent magnet power-assisted double-terminal vacuum insulated grounding switch. Background technique [0002] The grounding switch is a very important switching device in the high-voltage electrical system of various types of electric locomotives and bullet trains with AC 25kV on the main line. It plays the role of double-terminal grounding protection of the vacuum circuit breaker of the main circuit during maintenance and emergency treatment. [0003] The vehicle-mounted grounding switch is mainly divided into three categories: manual, pneumatic and electric according to the driving mode, and the insulation form is basically the air knife switch type. Since the air insulation in a high-voltage environment needs to ensure sufficient electrical clearance, the grounding switch knife switch and vacuum There must be a certain d...

AI Technical Summary

Problems solved by technology

In addition, the grounding switch has technical deficiencies in the development of integration and miniaturization of high-voltage electrical appliances, complex structure, large space volume, and poor matching of mechanical properties.

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