Double composite plastic steel composite pipe and manufacture method thereof

Abstract

The invention provides a double composite plastic steel composite pipe and a manufacture method thereof, discloses a method for manufacturing a liquid conveying pipeline with the advantages of high annular rigidity, low material consumption, capability of bearing internal pressure, favorable sanitary performance, long service life, and better comprehensive performance. The basic process comprises steps of: manufacturing a plastic steel strip, manufacturing a plastic steel winding pipe stock by using the plastic steel strip, compounding and winding a metal wire, extruding a hot melt adhesive and coating on an outer surface of the pipe stock and coating a fused plastic on the outer surface of the plastic steel winding pipe stock. Thus both the anti-corrosion performance of plastic and the rigidity of steel belts are utilized; due to the adoption of the embedded steel wire, the internal pressure bearing performance of a buried pipe can be guaranteed; due to the composite structure of the pipe, the consumption of plastic is reduced, and the performance-price ratio of the pipe is greatly improved; and the manufacture method can be used for manufacturing large caliber liquid conveying pipelines, so as to solve the problem that the manufacture of large caliber plastic pipes is difficult in China.

Description

technical field [0001] The patent of the present invention relates to a double-composite steel-plastic composite pipe and its manufacturing method. It is a large-diameter composite pipe, and the pipe is mainly used in the field of liquid transportation. Background technique [0002] At present, polyethylene plastic pipes have been widely used in domestic water supply pipelines. The characteristics of this pipe are very prominent, with long service life and excellent corrosion resistance. In addition, no heavy metal salt stabilizers are added to polyethylene pipes during processing, and the material is non-toxic. In addition, it It will not promote the growth of algae, bacteria or fungi, which better solves the problem of secondary pollution of drinking water in cities and towns, and has good hygienic performance. Because it is an all-plastic pipe, when meeting the service pressure and anti-external pressure (ring stiffness), the wall thickness of the pipe is generally thicke...

AI Technical Summary

Problems solved by technology

At present, the large-diameter drainage pipes on the market are almost all steel-plastic composite products. These steel-plastic composite drainage pipes are mostly non-pressure structure pipes, and they all have sufficient ring stiffness to support the external load of the soil and ensure long-term safe use. However, they cannot be used as Used in pipelines for conveying liquid under pressure

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