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Cam rotation limiting apparatus

A rotary limit and cam technology, applied in the field of nuclear power, can solve problems such as low reliability, and achieve the effects of reducing fixed value drift, avoiding low reliability, and reducing the frequency of occurrence

Inactive Publication Date: 2017-12-08
FUJIAN NINGDE NUCLEAR POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a cam rotation limiting device to solve the problem of low reliability in the prior art due to frequent failures of bucket cam rotation limit switches

Method used

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0033] The invention provides a cam rotation limit device to solve the problem of low reliability caused by frequent failures of the bucket cam rotation limit switch in the prior art.

[0034] Specifically, the cam rotation limit device includes: a bucket limit switch, an on-site junction box, a limit switch bracket and a coupling, wherein the bucket limit switch is such as figure 2 Shown, including: high limit switch 201 and low limit swi...

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Abstract

The invention provides a cam rotation limiting apparatus. A high limiting switch controls a local junction box to output a high limiting trigger signal; a low limiting switch controls the local junction box to output a low limiting trigger signal; and transmission gears of the high limiting switch and the low limiting switch are both made from metal. Even if long-term or high-frequency use is performed, the transmission gears made from metal are not subjected to wearing and aging as a plastic material in the prior art, so that the frequency of occurrence of fixed value drifting of the limiting switches can be greatly lowered, and the problem of low reliability caused by frequent errors of a scraper pan cam rotation limiting switch in the prior art can be avoided.

Description

Technical field [0001] The present invention relates to the technical field of nuclear power, in particular to a cam rotation limiting device. Background technique [0002] In nuclear power plants, the grille cleaning machine for the important auxiliary equipment of the PX combined pump room is designed and supplied by the manufacturer as a whole; for the grille cleaning machine currently in use, the limit switch of the rake bucket is selected from SCHMERSAL company G50-025 -Z22 / 22Y-M20-1600-1 type cam rotation limit switch, its connection relationship with the 25 port, 26 port, 27 port, 28 port and 31 port of the local junction box is shown in figure 1 As shown, this type of limit switch includes: a high limit switch 101, a high limit switch 102, and a low limit switch 103; among them, the high limit switch 101 and the high limit switch 102 are inverted by AND logic Then, it forms an "OR" logic with the safety limit switch signal to generate a high limit trigger signal; the two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H3/42
CPCH01H3/42
Inventor 李怀洲陆海荣刘基华朱雷郎国庆薛成杰
Owner FUJIAN NINGDE NUCLEAR POWER
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