Rhombic continuous fiber prepreg tape reinforced long-distance oil and gas conveying composite pipeline and manufacturing method

Abstract

The invention discloses a rhombic continuous fiber prepreg tape reinforced long-distance oil and gas transmission composite pipeline which comprises a composite pipe, wherein the composite pipe comprises a plastic inner pipe layer, a reinforced pipe core layer and a plastic outer pipe layer. the reinforced pipe core layer comprises at least one combined unit layer; the combined unit layer comprises two first continuous fiber layers which are laid in the middle and are resistant to axial tension, and second continuous fiber layers which cover the upper and lower surfaces of the first continuous fiber layers and are resistant to radial tension; the continuous fibers in the first continuous fiber layer are parallel to the axis of the pipe, and the included angle between the continuous fibers in the second continuous fiber layer and the axis of the pipe ranges from 10 degrees to 80 degrees. According to the invention, the pipeline axial tensile stress resistance of the pipeline reinforced core layer is effectively improved, so that the pipeline axial tensile stress resistance of the pipeline body is greatly improved, and the technical problems of high pressure, high temperature and large-diameter pipeline axial tensile extension deformation are thoroughly solved.

Description

technical field [0001] The invention relates to the technical field of pipes, in particular to a diamond-shaped continuous fiber prepreg tape reinforced long-distance oil-gas composite pipeline. Background technique [0002] Continuous fiber prepreg tape reinforced composite high-pressure piping system has the advantages of high pressure resistance, high temperature resistance, corrosion resistance, long life, light weight, low cost, etc. It is widely used in municipal water supply and heating pipe networks, industrial and chemical pipe networks, oil field gathering and transportation Pipeline network, marine gathering pipeline network, slurry pipeline network, buried firefighting pipeline network, central air-conditioning pipeline, etc., have the tendency to completely replace plastic pipelines, metal pipelines, and plastic-metal composite pipelines. [0003] In the continuous fiber prepreg tape reinforced composite high-pressure pipes used in large quantities, the inner an...

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Problems solved by technology

[0005] When the winding angle of the prepreg tape is fixed at an optimal winding angle of about 55 degrees, as the diameter of the pipe increases, the width of the prepreg tape used becomes wider and wider. For example, the bandwidth of a 400mm diameter pipe is 720mm, and the width of a 600mm pipe 1080mm, wider and wider strips have brought difficulties to the technology and configuration of winding machines and heating system equipment, and have also brought great difficulties to the winding forming process. In order to solve the problem of ultra-large bandwidth, technical processing A winding machine is used to add multiple reels with a bandwidth of 200mm to 300mm, and the flat splicing layer is paved into a single layer of broadband. For example, if the bandwidth is 720mm, it is cut into 3 disks with a bandwidth of 240mm, and the bandwidth is 1080mm. Cut into 4 disks with a width of 270mm Bandwidth tiling splicing, the consequence of this winding technology is that as the diameter of the pipe increases and the pressure increases, the number of layers of winding tape required for it increases, which in turn brings the number of winding machines required and the number of winding discs The larger the value, the higher the equipment investment cost, the more complex the production process, and the lower the pipeline yield

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