Auxiliary filter bolt mounting and demounting tool and mounting and demounting method

By designing an auxiliary filter bolt installation and removal tool, the simultaneous tightening or loosening of multiple bolts can be achieved, solving the problem of high radiation risk during maintenance, improving efficiency and safety, and making it suitable for auxiliary filter bolt operation in nuclear power plants.

CN117124276BActive Publication Date: 2026-06-09JIANGSU NUCLEAR POWER CORP
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU NUCLEAR POWER CORP
Filing Date
2023-09-21
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In the existing technology, during the maintenance of auxiliary filter bolts, personnel need to be exposed to a high radiation environment for a long time, which poses a significant radiation safety risk and has low maintenance efficiency.

Method used

An auxiliary filter bolt installation and removal tool was designed. It achieves synchronous tightening or loosening of multiple bolts through mechanical transmission, uses radial bearings and gear meshing to transmit torque, and is equipped with a torque limiter and spring compensation mechanism to achieve synchronous operation of multiple bolts.

Benefits of technology

It significantly improves maintenance efficiency, reduces radiation dose to workers, ensures operational safety and reliability, is suitable for different maintenance processes, and has a compact structure that makes it easy to operate.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117124276B_ABST
    Figure CN117124276B_ABST
Patent Text Reader

Abstract

This invention relates to the field of nuclear power equipment, and more particularly to a tool and method for installing and removing auxiliary filter bolts. The tool comprises: a vertically arranged drive shaft, positioned and supported on an upper support seat by radial bearings; a drive gear fixedly connected to the lower end of the drive shaft, directly transmitting the input torque to the drive gear; several shaft holes on the upper support seat, positioned and supported by radial bearings for a driven upper shaft; a driven gear fixed on the driven upper shaft, meshing with the drive gear; an input end of a torque limiter connected to the driven gear, and an output end connected to a driven intermediate shaft; several shaft holes on the lower support seat, positioned and supported by radial bearings for a driven lower shaft; the driven upper shaft, driven intermediate shaft, and driven lower shaft connected sequentially; the upper end of a tightening sleeve inserted into the driven lower shaft, and a spring disposed outside the driven lower shaft. This invention can simultaneously tighten or loosen multiple bolts, improving work efficiency.
Need to check novelty before this filing date? Find Prior Art