Non-contact nuclear-grade limit switch

Abstract

The invention discloses a non-contact nuclear-grade limit switch which comprises a reed bouncing module, a socket arranged at the top of the reed bouncing module and a magnetic driving module arranged at the bottom of the reed bouncing module. The whole non-contact nuclear-grade limit switch is triggered through in and out of a magnet, manual triggering is not needed, the false triggering or non-triggering phenomenon is avoided, the requirement of the reed bouncing module for the deformation of the reed is very small, the service life of the elastic element can be very long under the condition of very small deformation, and the limit switch is of a pure mechanical structure and is convenient to use. The switching frequency can reach more than ten millions, and the linear bearing of the magnet driving module is arranged, so that the low-damping characteristic of axial movement is ensured, and the performance reliability of the product is effectively ensured.

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 steam isolation valves in nuclear reactors. Commonly used are contact nuclear level limit switches. After the valve mechanism moves to a certain position, it touches the limit switch wheel mechanism, triggers the action mechanism of the nuclear level limit switch, and outputs the switch signal. Due to the long-term contact between the wheel mechanism and the valve mechanism of the contact nuclear level limit switch, and the contact pressure is relatively high, the operating conditions are harsh, and problems such as deformation, looseness, and stagnation are prone to occur. [0003] In some nuclear reactors, non-contact nuclear-grade limit switches have been applied. Using the limit switch and the target to have built-in ma...

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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