A steel-plastic composite thread corrugated pipe

Abstract

The invention relates to a steel-plastic composite thread corrugated pipe and a manufacturing method thereof. A wave-form threaded structure is formed on the outer side of the steel-plastic composite thread corrugated pipe, and a plastic outer layer, a first binder layer, a steel belt layer, a second binder layer, a reinforcement layer and a plastic inner layer are arranged on the wave crest of the steel-plastic composite thread corrugated pipe from inside to outside in sequence. The manufacturing method of the steel-plastic composite thread corrugated pipe comprises the following steps: firstly, producing a plastic-coated steel belt; secondly, producing the reinforcement layer; thirdly, manufacturing the steel-plastic composite thread corrugated pipe. The steel-plastic composite thread corrugated pipe disclosed by the invention is high in anti-pressure ability and high in pipe ring stiffness; due to the adoption of a steel-plastic composite solid structure of polyethylene or polypropylene reinforcement layer, the anti-pressure ability of the pipe can be obviously improved, and the ring stiffness can reach more than 16 Kn / m<2>. The steel-plastic composite thread corrugated pipe disclosed by the invention is good in corrosion resistance; the steel belt is wrapped layer upon layer, and any other substance cannot leak to the steel belt, so that the steel belt is greatly protected to ensure that the steel belt is not corroded.

Description

technical field [0001] The invention relates to a threaded bellows, in particular to a steel-plastic composite threaded bellows. Background technique [0002] The existing HDPE structural wall thermal winding pipe (carat pipe) has the following disadvantages: First, the cost of the pipe is high: because it is made of all-plastic material, when a certain ring stiffness is reached, the amount of material used will increase significantly, and the plastic The price of the material itself is relatively expensive, so the cost of comprehensive materials is relatively high, which is about 30% higher than that of ordinary steel-plastic composite pipes. Second, it is impossible to produce super-large-diameter pipes: due to the all-plastic material, when producing large-diameter pipes, its compressive performance decreases in a three-dimensional manner. Therefore, it is impossible to produce pipes with a diameter of more than 3 meters, which is the biggest limitation of this product. ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a steel-plastic composite threaded corrugated pipe to overcome the problems of low ring rigidity, poor corrosion resistance, poor coating between steel and plastic, and short service life in the prior art.

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