Large-caliber corrugated pipe comprising spiral-spring pipe framework and manufacturing method

Abstract

The invention relates to a large-caliber corrugated pipe comprising a spiral-spring pipe framework and a manufacturing method, wherein the strength of the large-caliber corrugated pipe can be effectively improved, and elasticity of the large-caliber corrugated pipe can be fundamentally improved. The large-caliber corrugated pipe comprises an inner pipe, a spiral-spring pipe is combined on the inner pipe, the inner wall of the spiral-spring pipe is in adhesive fit with the outer wall of the inner pipe, and a plastic layer is arranged on the surface of the spiral-spring pipe. The large-caliber corrugated pipe has the advantages that by means of the design of the hole ring type coil reed pipe framework, the integral compressive and bearing strength of the corrugated pipe is greatly improved, stretching change of the corrugated pipe caused by temperature is restricted to the maximum extent, and adaptability of the corrugated pipe to different temperatures is further improved, so that disconnection and fluid leakage of a butt joint of the corrugated pipe are avoided.

Description

technical field [0001] The invention relates to a large-diameter corrugated pipe composed of a snake-reed pipe skeleton and a manufacturing method thereof, which can not only effectively improve the strength of the large-diameter corrugated pipe, but also fundamentally improve the elasticity of the large-diameter corrugated pipe, belonging to the bellows manufacturing field. Background technique [0002] CN201078525Y, name "socket electrofusion connection type steel belt reinforced polyethylene spiral corrugated pipe", which is used to solve the problems of easy leakage and poor reliability of the connection interface of steel belt reinforced polyethylene spiral corrugated pipe. Socket electrofusion connection steel belt reinforced polyethylene spiral corrugated pipe is to fix the wound metal skeleton on the inner layer polyethylene with the outer layer polyethylene, especially one end of the bellows is provided with a socket, and the other end of the bellows is provided wit...

AI Technical Summary

Problems solved by technology

[0002] CN201078525Y, name "socket electrofusion connection type steel belt reinforced polyethylene spiral corrugated pipe", which is used to solve the problems of easy leakage and poor reliability of the connection interface of steel belt reinforced polyethylene spiral corrugated pipe

Its disadvantages: First, the metal frame is an external structure, and the line-surface contact with the inner layer of polyethylene is formed instead of surface contact. Damage to the inner layer of polyethylene will directly affect the quality of the tube, and even cause damage to the inner layer of polyethylene; second, the support strength is low, because the metal skeleton is an external structure, and the two sides of the metal skeleton move outward under external pressure, which not only causes metal The delamination of the skeleton and the inner layer of polyethylene leads to a direct decrease in the strength of the inner layer of polyethylene; third, because the outer layer of polyethylene and the metal skeleton are two different materials, the coefficients of thermal expansion and contraction are different due to the influence of temperature. Not the same, so delamination inevitably occurs during use, resulting in a sharp drop in the strength of the bellows and the collapse of the bellows

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