Mini-type bistable-state self-locking valve

Abstract

The invention provides a mini-type bistable-state self-locking valve which is low in power consumption, long in service life and reliable in sealing. The mini-type bistable-state self-locking valve comprises a valve body, a closing coil, an opening coil, a permanent magnet, a valve element, stop iron, a wire and a shell; the stop iron and the valve element are sequentially arranged in an inner cavity of the upper portion of the valve body; the opening coil, the permanent magnet and the closing coil are sequentially arranged in steps outside the valve body in the axial direction; the valve body comprises a valve seat, a lower magnetism isolating ring, a magnetism conductive ring, an upper magnetism isolating ring and a tip which are sequentially welded into a whole through vacuum electron beams; the valve element comprises a rubber block, anti-friction rings and a valve element substrate of a cylindrical structure; the rubber block is embedded into the bottom of the valve element substrate; the anti-friction rings are embedded into the cylindrical face of the valve element substrate and protrudes out of the cylindrical face; an O-shaped rubber sealing ring is arranged between the stop iron and the valve body; and the stop iron and the valve body are connected into a whole through laser welding.

Description

technical field [0001] The invention relates to a valve, in particular to a miniature bistable self-locking valve. Background technique [0002] The trace gas detection system of the space station needs to be equipped with a pipeline control valve whose working medium is hydrogen, and the control valve generally adopts a self-locking valve. The existing self-locking valve body structure has low sealing reliability for systems where the working medium is hydrogen; the self-locking valve core will always be in contact with the guide surface of the valve body under the action of permanent magnetic force, and the metal-to-metal contact between the valve core and the metal The friction force is relatively large, and it is easy to wear and tear, resulting in excess material, which affects the sealing performance. After severe wear, the valve core will be stuck, unable to move, and have a short life; moreover, the existing self-locking valve has a large mass and volume, which canno...

AI Technical Summary

Problems solved by technology

The existing self-locking valve body structure has low sealing reliability for systems where the working medium is hydrogen; the self-locking valve core will always be in contact with the guide surface of the valve body under the action of permanent magnetic force, and the metal-to-metal contact between the valve core and the metal The friction force is relatively large, and it is easy to wear and tear, resulting in excess material, which affects the sealing performance. After severe wear and tear, the valve core will be stuck, unable to move, and have a short life; moreover, the existing self-locking valve has a large mass and volume, which cannot meet the needs of use. Require

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