Heavy caliber high-strength plastic wound pipe having pipe wall made of wrapping material and manufacture method therefor

Abstract

The invention relates to a method for producing big high strength plastic coil tube which uses coil material to form tube wall, wherein the coil material is a composite plastic section bar formed by an inner core and an outer layer, which is alternatively or irregularly arranged, and nearby side walls are fused to connected or adhered by fused material, to be screwed to form tube wall. The coil material is drawn to direct the molecule longitudinally. The outer layer is thermal plastic, while the inner corn is strength material and / or flameproof material and / or static resistance composed in plastic base material. The fusing connecting material is plastic polymer or added with strength material and / or flameproof material and / or static resistance, to form plastic fused material. The strength material is distributed in the coil material and / or fusing connecting material, directionally distributed along the screw of high-strength coil tube. The invention has high strength, flameproof property and static resistance.

Description

technical field [0001] The invention belongs to the field of engineering components, and in particular relates to a large-caliber high-strength plastic winding pipe. Its diameter can reach 300-6000mm, which is suitable for application in water supply and drainage pipes, etc. Background technique [0002] Due to a series of superior properties such as light weight, corrosion resistance, small flow resistance, convenient construction, and long service life, plastic pipes are gradually replacing traditional pipes such as cast iron pipes, cement pipes, and ceramic pipes, and are increasingly widely used in the field of water supply and drainage. [0003] In the existing technology, the molecular arrangement of the plastic pipe is oriented along the axial direction of the pipe during the extrusion process, so that the longitudinal tensile strength of the pipe is high and the hoop stress intensity is low. However, under the action of internal pressure, the hoop stress suffered by ...

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Problems solved by technology

[0003] In the existing technology, the molecular arrangement of the plastic pipe is oriented along the axial direction of the pipe during the extrusion process, so that the longitudinal tensile strength of the pipe is high and the hoop stress intensity is low. However, under the action of internal pressure, the hoop stress suffered by the pipe is greater than the tensile stress , so that the strength of the material is not fully exerted in terms of pressure resistance

[0004] In addition, due to the limitation of the strength of the plastic material itself, the plastic pipe still cannot meet the requirements in the field of high-pressure water supply and drainage, and the application field is limited to a certain extent.

Also due to the production of solid-wall pipes with traditional production equipment, the investment in equipment is large, and it is technically difficult to realize. So far, the production of large-diameter solid-wall plastic pipes with a diameter greater than 2000mm has not been reported.

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