Pressure vessel bolt hole thread inspection device

Abstract

The invention discloses a pressure vessel bolt hole thread inspection device, which comprises a vehicle body assembly and a camera assembly, and the vehicle body assembly and the camera assembly are connected through a connecting block and can be quickly disassembled and assembled. The vehicle body comprises a vehicle body lower plate, a supporting column, a vehicle body upper plate, a camera shooting assembly connecting block, a first positioning assembly, a second positioning assembly, a second positioning block, a guide rod, a third positioning assembly, a first positioning block, a lifting air cylinder, a walking wheel, a proximity sensor, a limiting screw, a sliding plate, a guide wheel and a walking air cylinder. The vehicle body lower plate and the vehicle body upper plate are connected into a vehicle body structure through supporting columns, and walking wheels are installed on the lower portion of the vehicle body lower plate. The device has the beneficial effects that the center of the positioning block on the sliding plate is just aligned with the center of the adjacent unthreaded hole on the top cover when the sliding plate is at two limiting positions through the limitation of the limiting screw; when the sliding plate and the positioning block on the vehicle body extend into the unthreaded hole, the vehicle body can be positioned relative to the top cover.

Description

technical field [0001] The invention belongs to an inspection device, in particular to a pressure vessel bolt hole thread inspection device. Background technique [0002] The video inspection of the bolt holes of the reactor pressure vessel (hereinafter referred to as "RPV") is a necessary work during the overhaul of the nuclear power plant. The purpose is to conduct a video inspection of the cleaned main screw holes. Screw in to create conditions to avoid bolt seizure. At present, power plants at home and abroad generally use bolt hole video inspection devices to inspect threads. [0003] At present, most of the existing reactor units will first lift off the top cover of the reactor and set up the false top cover when conducting video inspection of the bolt hole thread, and then use the bolt hole thread inspection device to walk on the flange surface of the pressure vessel and make a video of the thread. examine. In order to save the time and workload of overhaul, some u...

AI Technical Summary

Problems solved by technology

At present, the video inspection devices developed by relevant domestic institutions can only walk on the flange surface of the pressure vessel, which cannot meet the needs of video inspection of the bolt hole thread of the pressure vessel when the top cover is in place.

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