Continuous reinforced thermoplastic pipe wound around by metal strip

Abstract

The invention discloses a continuous reinforced thermoplastic pipe wound around by a metal strip. According to the pipe, a method of group division designing of the winding metal strip is adopted, thewinding metal strip is reasonably distributed, and meanwhile, the high strength of the metal strip is utilized to increase the circumferential strength and the axial strength of a pipe, so that the anti-pressure ability of the pipe is improved, metal belt reinforcing layers are not bonded, the flexibility of the composite pipe is improved, and the relative slippage amount among the metal belt layers is reduced; and the manufacturing process is simple and convenient, the equipment investment requirement is small, so that the manufacturing cost is greatly reduced, and the flexibility and the seismic resistance of the pipeline are guaranteed.

Description

technical field [0001] The invention relates to a reinforced thermoplastic composite pipe, in particular to a metal strip winding continuous reinforced thermoplastic composite pipe. Background technique [0002] Reinforced Thermoplastic Pipes (Reinforced Thermoplastic Pipes referred to as RTP), usually adopts a three-layer structure, the inner layer is usually a corrosion-resistant and wear-resistant thermoplastic pipe, the middle layer is a reinforcing layer for reinforcement, and the outer layer is for protection. The outer cladding layer; the reinforcement layer mostly uses reinforced fiber ribbons, metal wires, metal belts; glass fiber wires, glass fiber ribbons. Because of its advantages of high pressure resistance, corrosion resistance, good flexibility and the ability to ensure its continuity, it has been widely used in oil field transportation pipelines, municipal water supply, drainage and other liquid and gas material transmission pipelines. Existing reinforced ...

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Problems solved by technology

Existing reinforced thermoplastic composite pipes are usually reinforced by spiral winding of multi-layer metal strips along the pipe axis. According to the different winding directions, it can be divided into adjacent reverse cross winding and adjacent same direction and pairwise reverse cross winding. The former has a simple process but cannot guarantee a uniformly reinforced pipeline and cannot withstand high pressure; the latter can withstand high pressure, but the process is more complicated, the production equipment is expensive, and the cost is high, and the winding diameter of the coiled tubing is greatly limited by the equipment conditions

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