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

Abstract

The invention discloses an ultra-high-molecular-weight polyethylene steel wire composite pipe and a preparation method thereof. It has a base pipe, and steel wires are used on the outer wall of the base pipe to be wound and arranged in a manner perpendicular to the axis of the base pipe. The cross-linked polyethylene stretch tape is heat-bonded with polyethylene hot-melt adhesive between the steel wire and the steel wire, between the steel wire and the base pipe, and between the steel wire and the radiation cross-linked polyethylene stretch tape. The preparation method is to use ultra-high molecular weight polyethylene pipe as the base pipe, coat polyethylene hot melt adhesive on the outer surface of the base pipe, and use steel wires to wind and arrange the outer wall of the base pipe in a manner perpendicular to the axis of the base pipe; The vinyl stretching tape is wrapped on the steel wire on the outer wall of the base tube in a spiral winding manner, and the base tube, the steel wire and the radiation cross-linked polyethylene stretching tape are glued into one body by hot melting. The pipeline of the present invention has good flexibility and no joint stress concentration fracture phenomenon occurs; the cost is low, only one-third of the price of the existing composite pipeline, and large-diameter products can be manufactured according to user requirements.

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