Double reinforced plastic composite water pipe, device and method for manufacturing water pipe, and special-shaped strip for manufacturing water pipe

Abstract

A water pipe comprises a plastic pipe body and a vertical reinforced rib, wherein the plastic pipe body is reinforced by a steel mesh or a metal pore plate, and the vertical reinforced rib is integrated with the pipe body. Besides, a reinforced steel strip is composited in the reinforced rib. A special-shaped strip for manufacturing the water pipe comprises a strip base layer and a vertical reinforced rib portion which are integrated, a continuous steel mesh or a continuous metal pore plate reinforcing layer is composited in the strip base layer, and a steel strip is composited in the vertical reinforced rib portion. The method for manufacturing the water pipe includes the steps: extruding molten plastics into an upper forming cavity of a composite head and compositing the molten plastics with the steel strip in the upper forming cavity and the steel mesh or a metal pore plate in a middle forming cavity; and extruding molten plastics into a lower forming cavity of the composite head and compositing the molten plastics with the steel mesh or the metal pore plate in the middle forming cavity. The device for manufacturing the water pipe comprises the composite head including the upper forming cavity, the middle forming cavity and a lower forming cavity, wherein the upper forming cavity contains the steel strip, the middle forming cavity contains the steel mesh or the metal pore plate, the lower forming cavity forms the strip base layer, the upper forming cavity and the lower forming cavity of the composite head are the same in width and narrower than the steel mesh or the metal pore plate, and the width of the middle forming cavity is as same as that of the steel mesh or the metal pore plate.

Description

technical field [0001] The present invention relates to a composite water delivery pipe, specifically a composite water delivery pipe reinforced by steel strips and steel meshes or metal orifice plates. Strip. Background technique [0002] The water supply pipeline is a pressure pipeline, and the pipeline made of pure plastic raw materials is often used for pressure water transmission. In order to ensure that it has appropriate strength and ring stiffness at the same time, there must be sufficient wall thickness of the pipe, and the amount of raw materials per unit length is relatively large during manufacture. When small-diameter pressure pipes meet the strength requirements, their ring stiffness (ability to resist external loads) naturally meets the requirements at the same time, but when large-diameter pressure pipes meet the internal pressure strength, their ability to resist external pressure (ring stiffness) is far from far from enough. If large-diameter pressure pi...

AI Technical Summary

Problems solved by technology

Other large-diameter steel-plastic composite pipe structures also include, for example, CN2882985Y, which is a winding pipe with steel belt-reinforced vertical ribs, but it can only enhance the ring stiffness; another example is CN101943297A, which has been improved on the basis of CN2882985Y , that is, discontinuous filament or ribbon reinforcements are set in the pipe wall between the ribs, but it only further enhances the ring strength, neither of which can enhance the axial strength, so that it cannot provide a complete load-bearing interior. ability to press

Therefore, although these two pipeline structures can form large-diameter pipelines, they can only be used as drainage pipes, and can not be used as pressure pipelines like ZL94104509. The pipeline of CN2882985Y structure, although the ring stiffness and axial strength of this pipeline are all strengthened, but due to the limitation of ZL94104509.9 structure, it is impossible to manufacture large-diameter pipelines; The structure of the fiber reinforced belt is used to strengthen the ring strength and axial strength. However, on the one hand, the inner and outer layers of this structure are not integrally formed, and there is a risk of mutual detachment. Fiber reinforced tape increases the complexity of the production process, and the production efficiency is relatively low

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