Steel-plastic composite pipe with bridge type framework

Abstract

The composite steel-plastic pipe with bridge skeleton consists of inner plastic layer, outer plastic layer and middle steel pipe, and the steel pipe has notches and ribs in the outer and inner surfaces and slit or holes in the notches to communicate the inner and the outer surfaces. The bridge steel skeleton can combine with the inner plastic layer and the outer plastic layer firmly and has the functions of reinforcing ribs and double steel pipe, and has less material consumption and certain elasticity. Therefore, the composite steel-plastic pipe with bridge skeleton has high strength, less weight, high corrosion resistance, low pressure loss, low cost and other advantages.

Description

Technical field: [0001] The invention relates to a metal-plastic composite pipe, in particular to a steel-plastic composite pipe. Background technique: [0002] At present, various composite pipes are widely used as transportation pipes in industry, agriculture and daily life due to their good performance and convenient installation, such as aluminum-plastic composite pipes, steel-plastic composite pipes and other metal-plastic composite pipes, etc. . The steel-plastic composite pipe is popular because of its advantages such as high strength, good rigidity, corrosion resistance, small pressure loss, and impact resistance. It is especially suitable for use as a large-diameter pipe. Disadvantages: (1) Steel mesh skeleton composite pipes and steel wire skeleton composite pipes have low strength and poor rigidity, which limits the application range of steel-plastic composite pipes; As the pipe diameter increases, the weight of the pipe increases, and the equipment power, equip...

AI Technical Summary

Problems solved by technology

The steel-plastic composite pipe is popular because of its advantages such as high strength, good rigidity, corrosion resistance, small pressure loss, and impact resistance. It is especially suitable for use as a large-diameter pipe. Disadvantages: (1) Steel mesh skeleton composite pipes and steel wire skeleton composite pipes have low strength and poor rigidity, which limits the application range of steel-plastic composite pipes; As the pipe diameter increases, the weight of the pipe increases, and the equipment power, equipment volume and energy consumption of pipe manufacturing increase. In addition, the steel pipe and the inner and outer plastics are bonded and sealed by hot melt adhesive, which may easily cause insufficient bonding of the steel pipe and the plastic. Strong, especially under the stress caused by heat and cold for a long time, the separation and slippage between the steel pipe and the plastic will occur, resulting in the corrosion of the steel pipe and shortening the service life; The inner and outer layers of plastic are connected through the holes of the steel pipe so that the steel pipe and the plastic are firmly combined. However, due to the large number of holes drilled through the steel pipe, the structure of the steel pipe is severely damaged, and its strength and rigidity will inevitably decrease. It must be compensated by increasing the wall thickness of the steel pipe. This loss results in an increase in pipe weight and cost

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