Personnel airlock limit switch sensing device with scales

Abstract

The invention belongs to the technical field of nuclear power station electrical maintenance, and particularly relates to a personnel airlock limit switch induction device with scales. The device comprises a nylon sheet with scales, a magnet block and a base, the upper surface of a middle body of the base serves asan induction surface, a cylindrical hole is formed in the induction surface in an inward chiseling mode, the size of the cylindrical hole is consistent with that of the magnet block, and the magnet block is installed in the hole; and the nylon sheet with the scales is fixed on the upper surface of the base provided with the magnet block. The induction mode is changed from a magnetic-iron mode into a magnetic-magnetic mode, the induction distance between alimit switch and aninduction component is improved, the reliability of equipment is improved, the failure rate of the equipment is reduced, the radiation risk of workers is reduced, the maintenance cost of the equipment is reduced, and alignment between the limit switch and the induction component is optimized.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant electrical maintenance, and in particular relates to a personnel gate limit switch sensing device with scales. Background technique [0002] The following problems were found during the troubleshooting of the gate limit switch of the reactor personnel of units 1 and 2 of a nuclear power plant: [0003] (1) The sensing distance of the limit switch of the personnel gate is certain, and the sensing part corresponding to the limit switch is an iron block. If the sensing distance is too short, it is easy for the sensing part of the limit switch to exceed the sensing range of the limit switch or collide with the limit switch; [0004] (2) There is no mark when adjusting the limit switch or the sensing part, and it is difficult to align the limit switch and the sensing part; [0005] (3) Both the limit switch and the sensing part are made of rigid materials, and the limit switch is easily da...

AI Technical Summary

Problems solved by technology

[0003] (1) The sensing distance of the limit switch of the personnel gate is certain, and the sensing part corresponding to the limit switch is an iron block. If the sensing distance is too short, it is easy for the sensing part of the limit switch to exceed the sensing range of the limit switch or collide with the limit switch;

[0004] (2) There is no mark when adjusting the limit switch or the sensing part, and it is difficult to align the limit switch and the sensing part;

[0005] (3) Both the limit switch and the sensing part are made of rigid materials, and the limit switch is easily damaged in the event of a collision

[0006] At present, the induction method of the limit switch and the induction part of the personnel gate is the "magnet-iron" type. Affected by the induction method, the distance between the limit switch and the induction part is limited; the limit switch and the induction part lack alignment reference, which is easy There is incomplete alignment or a long alignment time; there is a lack of buffer between the limit switch and the sensing part, and the collision of the sensing part cannot eliminate the damage to the limit switch in the event of a collision

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