Permanent Magnet Spring Mechanism Switch for Ice-melting Devices for Split-conductor Transmission Lines

Abstract

The invention provides a permanent magnet spring mechanism switch of a divided conductor power transmission line ice melting device. The permanent magnet spring mechanism switch at least comprises a vacuum arc extinction chamber and a switch arranged in the vacuum arc extinction chamber, and further comprises a permanent magnet spring operation mechanism for driving the switch to be switched on and off; a switching-on switch comprises a switching-on static contact and a switching-on movable contact; a permanent magnet driving mechanism comprises a switching-off coil, a switching-on coil, a movable iron core, an outer magnet yoke with a barrel-shaped structure, and a connecting rod for connecting the switching-on movable contact with the movable iron core; the switching-off coil and the switching-on coil are arranged at the bottom and the opening in the switching-off coil respectively; the movable iron core is inserted into the switching-off coil and the switching-on coil and can do reciprocating single-degree-of-freedom movement in the switching-off coil and the switching-on coil, so that the false switching-off rate of the permanent magnet mechanism switch can be remarkably reduced, the switching-on reliability of the permanent magnet mechanism switch can be effectively improved, and thus the working performance of the whole permanent magnet mechanism switch is guaranteed.

Description

technical field [0001] The invention relates to a permanent magnet mechanism switch, in particular to a permanent magnet spring mechanism switch of an ice-melting device for a split wire transmission line. Background technique [0002] With the emergence of super-strong permanent magnets - NdFeB rare earth permanent magnet materials, permanent magnet mechanisms with commercial value came into being. Compared with the spring mechanism and the electromagnetic mechanism, the permanent magnet actuator has only one moving part, no mechanical release and locking device, simple structure and high reliability. With the advancement of technology, its maintenance-free characteristics are becoming more and more significant. [0003] For the switch part of the transmission line current circulation intelligent ice melting device, a vacuum interrupter can be used with a permanent magnet operating mechanism, but the split wires connected in series in the transmission line current circulati...

AI Technical Summary

Problems solved by technology

In order to break the short-circuit current, the existing monostable permanent magnet mechanism switch is in a compressed state when the energy storage spring is closed. There is a certain probability of false opening from the design, and the closing reliability is not high enough.

For the bistable permanent magnet mechanism, such as the asymmetric double-coil permanent magnet mechanism disclosed in the Chinese invention patent with the publication number CN1542883A, the asymmetric design of the coil and the magnetic circuit is adopted, and the asymmetrical pair of the magnetic circuit maintains the static state. The influence of the force is less than 5%, and the asymmetry of the magnetic circuit can only improve the opening characteristics, but cannot improve the closing reliability of the permanent magnet mechanism. This is also a common deficiency of all ordinary bistable permanent magnet mechanisms. In addition, In order to ensure that the interrupter can reliably break the short-circuit current, the existing permanent magnet mechanisms have high requirements on volume and materials, and the structure is complex, which will inevitably lead to an increase in cost and process difficulty.

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