Single-phase magnetic-keeping operating mechanism

Abstract

The invention provides a single-phase magnetic-keeping operating mechanism, which comprises an upper magnet yoke, a lower magnet yoke, a magnetic sleeve, a movable iron core assembly, a lower plastic end block and a metal fixed pressure plate, wherein a coil is arranged in the middle of the upper magnet yoke, the lower magnet yoke and the sleeve; the movable iron core assembly comprises a movable iron core and a plastic seal cover; the plastic seal cover is arranged at the lower part of the movable iron core assembly through a thread; an air-gap dustproof bead is arranged at the upper end part of the movable iron core; the middle part of the movable iron core passes through an operating pull rod, a breaking spring and a closing spring; the movable core iron runs between the plastic end block and the upper magnet yoke in a limiting manner, and finishes mechanism operation through the operating pull rod through cooperation of the breaking spring and the closing spring; and a photoelectric sensing element is embedded into the plastic end block. The single-phase magnetic-keeping operating mechanism provided by the invention forms the magnetic sleeve by low-cost alloy structure steel and has an airtight dustproof straight motion structure; friction blockage of mechanism motion is completely avoided through limiting of the end part of the movable iron core and position and speed photoelectric signal transmission; and low cost, high reliability, intelligent monitoring and long-lifetime operation of the operating mechanism are achieved.

Description

technical field [0001] The invention relates to a single-phase magnetic holding operating mechanism, which belongs to the field of high-voltage switchgear. Background technique [0002] The permanent magnet operating mechanism has the following conditions: NdFeB permanent magnets are used to complete the operation and maintenance, and there is NdFeB demagnetization phenomenon during operation. Frequent operation is likely to cause mechanism failure, and the mechanism cannot meet the frequent operation requirements of more than 100,000 times. There is a situation where debris deposits in the gap between the iron core and the sleeve, causing operation jamming and failure. NdFeB is a rare earth material with high cost, and the material itself is easily broken, which requires high installation process. The opening and closing operation of the mechanism requires a large trigger energy and needs to be matched with a large-capacity energy storage capacitor, which requires high pow...

AI Technical Summary

Problems solved by technology

The position information of the operating mechanism is realized by the mechanical structure, and the operating speed information of the mechanism cannot be fed back

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