Water pipe, strip material, method and apparatus for manufacturing water pipe

Abstract

A water conveying pipe includes a composite reinforced outer pipe formed by spiral winding, and a composite reinforced inner lining pipe formed by spiral winding. The outer tube is a metal-reinforced plastic composite corrugated tube structure or a tube structure with metal-reinforced plastic composite vertical ribs. The inner lining pipe is formed by at least two layers of fiber-reinforced plastic composite strips that are continuously spirally wound along the inner wall of the outer pipe and attached to the inner wall of the outer pipe, and the inner lining pipe covers the helically wound seam of the outer pipe . The present invention also provides strips, methods and devices for manufacturing the above-mentioned water delivery pipe lining pipes. The pipeline can be used as a large and medium-sized water pipeline in the water source transmission of urban water plants.

Description

Technical field: [0001] The invention relates to a water delivery pipe, specifically a metal-reinforced plastic water delivery pipe with a spirally wound outer pipe and a fiber braid reinforced plastic composite strip material spirally wound along the inner wall of the outer pipe to form an inner liner. The invention also relates to a strip, a method and a device for making the liner. Background technique [0002] Patents ZL200510082911.4 and ZL100320114847.X for metal-reinforced structural wall pipes used in the manufacture of drainage pipes disclose two manufacturing methods for steel belt reinforced plastic drainage pipes. The above patents can be used to manufacture diameters greater than 1000mm and ring stiffness ≥ 8KN / m 2 Large diameter, high ring stiffness plastic drainage pipes. Most of the existing plastic drainage pipes are non-pressure structural wall pipes, all of which have sufficient ring stiffness to support the external load of the soil and ensure long-ter...

AI Technical Summary

Problems solved by technology

Small-diameter pressure pipes usually have sufficient ring stiffness (ability to resist external loads) when the internal pressure is satisfied; however, when large-diameter pressure pipes meet the internal pressure strength, their ability to resist external pressure is far from sufficient. The large-diameter pressure pipe has the ability to resist internal and external pressure, and its wall thickness must be greatly increased, making its manufacturing cost difficult to be accepted by the market

Although plastic materials with higher grades and better performance have been developed in recent years, and composite reinforced pressure pipe products with better performance to save plastic raw materials have also been developed, but common pure plastic pipes are only 730mm and below. product

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