Large-diameter high-temperature bolt dismounting tool

Abstract

The invention relates to a large-diameter high-temperature bolt dismounting tool. The large-diameter high-temperature bolt dismounting tool comprises an upper cover plate, a lower cover plate, pin rollers and a shell. The upper cover plate and the lower cover plate are mounted on the two sides of the shell respectively. The two ends of each pin roller are mounted in a sliding groove of the upper cover plate and a sliding groove of the lower cover plate respectively, and the middle parts of the pin rollers slide in grooves which are gradually lengthened in the radial depth direction of the shell. Compared with the prior part, the large-diameter high-temperature bolt dismounting tool has the advantages of being capable of protecting spare parts, convenient to maintain, safe, reliable and the like.

Description

technical field [0001] The invention relates to a removal tool, in particular to a large-diameter high-temperature bolt removal tool. Background technique [0002] Bolts play a vital role in the safe operation of power plants. Due to the influence of factors such as long-term operation and high-temperature environment on site, it often happens that the bolts cannot be disassembled. Especially for important equipment, due to high operating conditions and high safety requirements, deep blind hole threaded fine tooth bolts are often used. These bolts usually have large diameters and long thread fit lengths, which may damage the threaded bottom holes on the equipment body during disassembly, and are limited by materials, heat treatment, on-site processing conditions, etc., and the processing of threaded bottom holes is more complicated. And difficulties, which will directly affect the maintenance work of the power plant, resulting in major economic losses. Through the investi...

AI Technical Summary

Problems solved by technology

These bolts usually have large diameters and long thread fit lengths, which may damage the threaded bottom holes on the equipment body during disassembly, and are limited by materials, heat treatment, on-site processing conditions, etc., and the processing of threaded bottom holes is more complicated. and difficulties, which will directly affect the maintenance work of the power plant and cause major economic losses

Through the investigation, the original methods such as pipe wrench, hammer and hand hammer are currently used. Due to the large tightening force, the pipe wrench often slips and breaks, resulting in unsafe situations. Even the removed bolts have been bitten severely.

Images