Ultrahigh molecular weight polyethylene dead-hard steel wire composite pipeline and manufacture method thereof

Abstract

The invention discloses a high strength steel wire composite pipeline of ultrahigh molecular weight polyethylene and the preparation method thereof, and steel wires are winded and arranged in the manner of being perpendicular to an axial line of a base tube, and the external walls of steel wires are wrapped with a sheet-shaped spiral winding radiation crosslinking polyethylene tension belt. A polyethylene hot melt adhesive is adopted among the steel wires, between the steel wires and the base tube and between the steel wires and the radiation crosslinking polyethylene tension belt to heat, so that the steel wires, the steel wires and the base tube, the steel wires and the radiation crosslinking polyethylene tension belt are bonded into a whole. The preparation method is that a tube of the ultrahigh molecular weight polyethylene is chosen as the base tube, and steel wires are winded and arranged in the manner of being perpendicular to the axial line of the base tube at the external wall of the base tube; at last, the radiation crosslinking polyethylene tension belt wraps on the steel wires of the external wall of the base tube in the manner of the spiral winding to integrate adhesively. The flexibility of a pipeline of the invention is good, and the phenomenon the joint stress intensively fractures can not appear. The cost is low, which is only one third of that of the prior composite pipe, and large diameter product can be manufactured according to requirements of users.

Description

technical field [0001] The invention relates to a polyethylene pipe, which is an ultra-high molecular weight polyethylene high-strength steel wire composite pipe and a preparation method thereof. Background technique [0002] The applicant's patented UHMWPE pipe product has been widely recognized by users due to its superior performance after being used in the market in recent years. However, with the continuous increase in the price of polyethylene raw materials, the production cost has been greatly increased. In order to reduce production costs, the applicant has developed a composite pipe using steel wire in order to reduce the thickness of the pipe wall, thereby reducing the amount of polyethylene material used. In the known technology, there are multiple structures of composite pipes lined with steel wires, but there are some disadvantages: for example, polyethylene or silane cross-linked polyethylene material is the composite pipe matrix, impact resistance, tensile st...

AI Technical Summary

Problems solved by technology

In the known technology, there are multiple structures of composite pipes lined with steel wires, but there are some disadvantages: for example, with polyethylene or silane cross-linked polyethylene material as the composite pipe matrix, the impact strength, its tensile strength, Lower wear resistance, environmental cracking resistance and fatigue resistance

Due to the low strength of the pipe matrix and the winding method of the steel wire, the single-layer steel wire composite pipe is prone to cracking in the circumferential direction, and the double-layer steel wire composite pipe cannot be bent longitudinally, resulting in stress concentration at the joint and cracking during installation or use. Phenomenon

Another example: In the scheme disclosed in Patent No. ZL031511309, FRP is used as the outer layer. The outer layer of this pipe has extremely poor crack resistance, wear resistance and fatigue resistance, and is easy to crack or peel off. The exposed steel wire will soon be used Corrosion in the environment causes pipeline leakage, which in turn makes the pipeline scrapped. Therefore, this kind of pipeline has not yet been approved by users in the market

Images