Non-contact nuclear level limit switch

Abstract

The invention discloses a non-contact nuclear level limit switch, which includes a reed spring module, a socket arranged on the top of the reed spring module and a magnetic drive module arranged at the bottom of the reed spring module; the whole non-contact nuclear level The limit switch is triggered by the in and out of the magnet, does not need manual triggering, and will not cause false triggering or non-triggering. The reed bouncing module has little demand for the deformation of the reed, and the elastic element has a long service life under the condition of small deformation. Very long, the limit switch is a purely mechanical structure, and the switching times can reach more than ten million times. The setting of the linear bearing of the magnet drive module ensures the low damping characteristics of the axial movement, effectively ensuring the performance and reliability of the product.

Description

technical field [0001] The invention relates to the field of limit switches, in particular to a non-contact nuclear-level limit switch. Background technique [0002] Nuclear-grade limit switches are used to indicate the opening of valve equipment such as vapor isolation valves in nuclear reactors. The commonly used contact type nuclear level limit switch, the valve mechanism moves to a certain position and touches the limit switch runner mechanism, triggers the action mechanism of the nuclear level limit switch, and outputs the switch signal. Due to the long-term contact between the runner mechanism and the valve mechanism, and the large contact pressure, the contact-type nuclear-level limit switch is prone to deformation, loosening, and jamming and other problems. [0003] Non-contact nuclear-level limit switches have been used in some nuclear reactors. The limit switch and the target have built-in magnets, which can trigger the switch action mechanism without contact. Com...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies of the prior art, the non-contact nuclear-grade limit switch provided by the present invention solves the problems that existing non-contact nuclear-grade limit switches have poor working conditions, deformation, looseness, and stagnation.

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