A double wall bellows

Abstract

The invention belongs to the field of plastic pipe manufacture, in particular to a double-wall corrugated pipe, which includes a pipe body, a corrugated ring, a rotating ring and a deflector; the pipe body is made of high-strength PVC material, and the outer surface of the pipe body The corrugated rings are fixedly connected at even intervals, and the inner wall of the pipe body is rotated and connected with rotating rings at even intervals; the inner surface of the rotating ring is arc-shaped, and the inner wall of the rotating ring is fixedly installed with deflectors; the inclination of the deflectors The angle is set to gradually increase from bottom to top; the present invention is mainly used to solve the problem that when the double-wall corrugated pipe in the prior art is used in the sewer, it is easy to make silt accumulate at the bottom of the pipe and cannot be cleaned, and at the same time, a large amount of dirt is easy to accumulate at the corner of the pipe , and because the double-wall corrugated pipe is laid underground, the underground environment is relatively humid, which can easily lead to leakage problems caused by oxidation and corrosion on the outer surface of the double-wall corrugated pipe.

Description

technical field [0001] The invention belongs to the field of plastic pipe manufacture, in particular to a double-wall corrugated pipe. Background technique [0002] High-density polyethylene (HDPE) double-wall corrugated pipe is a new type of pipe with a ring-shaped outer wall and a smooth inner wall. It was first successfully developed in Germany in the early 1980s. After more than ten years of development and improvement, it has developed from a single variety to a complete product series. At present, the production process and application technology are very mature. Due to its excellent performance and relatively economical cost, it has been greatly promoted and applied in developed countries such as Europe and the United States. In my country, the promotion and application of HDPE double-wall corrugated pipes are on the rise, and all technical indicators have reached the use standards. The inner wall of the double-wall corrugated pipe usually has blue and black colors...

AI Technical Summary

Problems solved by technology

The present invention is mainly used to solve the problem that when the double-wall corrugated pipe in the prior art is used in the sewer, it is easy to make silt accumulate at the bottom of the pipe and cannot be cleaned, and at the same time, a large amount of dirt is easy to accumulate at the corner of the pipe. The underground environment is relatively humid, which can easily lead to leakage problems caused by oxidation and corrosion on the outer surface of the double-wall corrugated pipe

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