Variable-speed moving device of main contact and arc contact in arc extinguishing chamber

Abstract

The invention relates to a variable-speed moving device of a main contact and an arc contact in an arc extinguishing chamber, belonging to the high-voltage switch manufacturing and designing field. The variable-speed moving device comprises guide rails and a main shaft. The guide rails are fixed in the arc extinguishing chamber; the main shaft is arranged in the arc extinguishing chamber; two short crank arms are fixed on two ends of the main shaft; two long connecting plates correspond to the two short crank arms; a long crank arm, a first short connecting rod, a second connecting rod and the arc contact are fixed in the middle of the main shaft, wherein the first short connecting rod, the second connecting rod and the arc contact are movably connected in sequence; the two short crank arms are movably connected to two sides of the main contact through the two long connecting plates which correspond to the two short crank arms; the arc contact penetrates the center of the main contact; the two long crank arms are movably connected to one end of the first short connecting rod; the other end of the first short connecting rod is movably connected with the second short connecting rod through a pin; the end part of the pin is provided with a roller; the guide rails extends to position between the two long connecting plates; and the roller runs along the guide rails.

Description

technical field [0001] The invention relates to the field of manufacture and design of a high-voltage switch, in particular to a different-speed moving device for main and arc contacts in an arc extinguishing chamber. [0002] A motion system of a gas interrupter, suitable for various voltage levels, especially suitable for ultra-high voltage and large-capacity circuit breakers, which can effectively increase the short-circuit breaking capacity and reduce mechanical operation energy. Background technique [0003] At present, in the existing high-voltage switches (such as circuit breakers), the main and arc contacts of most product moving parts are rigidly connected. During the opening and closing movement, the main and arc contacts move at a constant speed, but , according to the principle of arc extinguishing, the requirement for the opening speed of the main contact is relatively low, and the requirement for the opening speed of the arc contact is relatively high. The mai...

AI Technical Summary

Problems solved by technology

In addition, when the main and arc contacts are rigidly connected, the movement stroke of the main contact is correspondingly lengthened, and the operating energy is correspondingly increased.

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