Cold-drawn precision steel pipe

Abstract

The invention discloses a cold-drawn precision steel pipe which comprises three layers of structures, wherein an outer supporting pipe is arranged on the outermost layer, a hexagonal steel pipe, and used for supporting the whole cold-drawn precision steel pipe, and has a safety protection effect; a conveying pipeline is arranged on the innermost layer, and an inner wall alloy pipe and comprises alloy steel pipes; a filling layer is arranged between the outer pipe and the inner pipe and comprises dense plastic materials, and an arc-shaped groove is formed in the filling layer; foam shock absorption rings are arranged at the two end parts of the cold-drawn precision steel pipe, so that two steel pipes can be conveniently connected. The cold-drawn precision steel pipe has the benefits that the cold-drawn precision steel pipe is high in size precision, good in inner and outer surface roughness, high-pressure-resistant, leak-proof, high in precision, good in smoothness and free of cold-bending deformation at a joint.

Description

technical field [0001] The invention relates to the field of steel pipes, in particular to a cold-drawn precision steel pipe. Background technique [0002] For high-rise buildings, after the completion of each floor, the roof of each floor needs to be capped. It needs to use concrete to smooth the top floor. The transmission of concrete slurry generally adopts large pipelines, which are pulled up to the top of the floor by power pulling. During the drawing process, since the materials include hard materials such as cement and sand, the pipes are easily worn during the transmission process. Most of the traditional pipes are made of cold-drawn precision steel pipes for the outer skin, and the inner skin is made of anti-wear materials, and the service life is not long. The inner layer is often replaced regularly. The present invention adopts a new cold-drawn precision steel pipe to solve the problem that the inner wall of the steel pipe is not wear-resistant. Contents of the ...

AI Technical Summary

Problems solved by technology

[0002] For high-rise buildings, after the completion of each floor, the roof of each floor needs to be capped. It needs to use concrete to smooth the top floor. The transmission of concrete slurry generally adopts large pipelines, which are pulled up to the top of the floor by power pulling. During the drawing process, since the materials include hard materials such as cement and sand, the pipes are easily worn during the transmission process. Most of the traditional pipes are made of cold-drawn precision steel pipes for the outer skin, and the inner skin is made of anti-wear materials, and the service life is not long. The inner layer is often replaced regularly. This invention adopts a new cold-drawn precision steel pipe to solve the problem that the inner wall of the steel pipe is not wear-resistant

Images