Spiral steel pipe with reinforcing rings and manufacturing method of spiral steel pipe

Abstract

The invention discloses a spiral steel pipe with reinforcing rings and a manufacturing method of the spiral steel pipe. The steel pipe comprises a spiral pipe body formed by spirally winding main steel strips; spiral joints are formed between the adjacent main steel strips of the spiral pipe body; the reinforcing rings are spirally wound on and locked to the outer wall or the inner wall of the spiral pipe body; at the spiral joints, the reinforcing rings are formed by bending narrow steel strips and the sections of the reinforcing rings are circular-arc-shaped, square or trapezoidal. The reinforcing rings are capable of enhancing the overall annular strength of the pipe, the thickness of the pipe can be reduced by more than a half, and the cost can be greatly reduced; meanwhile, the inertia moment of the circumferential section of the pipe is increased exponentially; as a result, the effect of the reinforcing rings is much better than that of a common reinforcement way, and consequently, the deformation problem of a large-diameter steel pipe, in particular a steel pipe of which the diameter is greater than 4m, during production is solved, and a steel pipe with an ultra-large diameter (10m or above) can be produced. Besides, the spiral joints formed between the adjacent sections of the spiral steel pipe are capable of surrounding the reinforcing rings so that the leakage protection at the joints can be strengthened.

Description

technical field [0001] The invention relates to a steel pipe, in particular to a spiral steel pipe with a reinforcing ring and a manufacturing method thereof. Background technique [0002] There are various pipelines such as reinforced concrete pipelines, plastic pipelines and steel pipelines at present, but the diameters of the above-mentioned pipelines cannot be too large. It is bulky, difficult to construct, easy to leak, and the medium pressure should not be too high, so it cannot be used as a pressure pipe; the plastic pipe has a small elastic modulus, and when used as a large-diameter pipe, the hoop stiffness cannot meet the requirements, and it cannot be used as a pressure pipe. Pipeline; when the diameter of the steel pipe is too large, in order to meet the most basic anti-crush strength, that is, the hoop stiffness, it is necessary to increase the thickness of the steel plate, the cost is high, and the diameter should not be too large, when the diameter exceeds 4 me...

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Problems solved by technology

[0002] There are various pipelines such as reinforced concrete pipelines, plastic pipelines and steel pipelines at present, but the diameters of the above-mentioned pipelines cannot be too large. It is bulky, difficult to construct, easy to leak, and the medium pressure should not be too high, so it cannot be used as a pressure pipe; the plastic pipe has a small elastic modulus, and when used as a large-diameter pipe, the hoop stiffness cannot meet the requirements, and it cannot be used as a pressure pipe. Pipeline; when the diameter of the steel pipe is too large, in order to meet the most basic anti-crush strength, that is, the hoop stiffness, the thickness of the steel plate must be increased, the cost is high, and the diameter cannot be too large. When the diameter exceeds 4 meters , under the influence of weight, the pipe may be deformed during production, and it is not easy to process

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