Special expansion joint for pulverized coal guide

Abstract

The invention relates to a special expansion joint for pulverized coal guide. The special expansion joint comprises a corrugated pipe, a middle connecting pipe and a telescopic connecting pipe. The telescopic connecting pipe stretches into the middle connecting pipe, sealing packing is arranged between the telescopic connecting pipe and the middle connecting piece, and the middle connecting pipe is connected with the corrugated pipe through an axial guide assembly. The axial guide assembly comprises a cylindrical connecting pipe and a pull rod assembly, one side of the cylindrical connecting pipe is provided with a guide wheel, the guide wheel is in contact connection with the outer surface of the telescopic connecting pipe, one side of the cylindrical connecting pipe is connected with the middle connecting pipe through an annular plate and a bolt, and the other side of the cylindrical connecting pipe is connected with an annular plate of the corrugated plate through the pull rod assembly. The special expansion joint is provided with a guide device, and therefore the middle connecting pipe and the telescopic connecting pipe cannot deviate. According to the special expansion joint, the compensation amount of axial displacement is large, meanwhile, a certain deflection angle displacement can also be compensated, and therefore displacement generated when pipeline equipment runs can be effectively compensated and absorbed. The special expansion joint is simple in structure, convenient to use, practical, long in service life and convenient to manufacture, install and maintain.

Description

technical field [0001] The invention relates to the technical field of pipeline compensators, in particular to a special-purpose expansion joint mainly used for coal powder guiding in coal-fired power plants. Background technique [0002] At present, industries such as electric power and building materials generally need to install and use pipeline expansion joints, or pipeline compensators, in pipelines. Pipeline expansion joints usually include spherical expansion joints and bellows expansion joints. The expansion joint can make axial linear displacement and radial angular displacement, and can effectively compensate and absorb the displacement generated by boilers and other equipment during operation. The bellows expansion joints installed in existing coal-fired power plants are generally designed for pulverized coal pipelines. The use environment of pulverized coal pipeline expansion joints is relatively harsh and usually requires a large amount of compensation. The exis...

AI Technical Summary

Problems solved by technology

In this way, in the long-term use process, since the expansion joint will also produce a certain angular displacement in the axial linear displacement, the axis of the intermediate joint and the telescopic joint will deviate, resulting in the obstruction of the expansion and contraction of the intermediate joint and the telescopic joint. Leakage will easily occur if you continue to use it, and the compensator must be replaced, resulting in a short service life of the compensator, a large workload for maintenance and replacement, and high costs

Images