Manufacturing technology of steel strip composite reinforced polyethylene spiral bellows

Abstract

The invention discloses a manufacturing technology of a steel strip composite reinforced polyethylene spiral bellows. The manufacturing technology of the steel strip composite reinforced polyethylenespiral bellows comprises the following steps of punching, degreasing and cleaning a steel strip, and carrying out pre-stress relief molding bending treatment to bend a cross section of the steel stripinto an omega shape. According to the manufacturing technology of the steel strip composite reinforced polyethylene spiral bellows, a design of punching the two side parts of the steel strip is adopted, so that resin of the inner layer and the outer layer of the steel strip mutually penetrate at the punching parts after the steel strip is finally wound and molded to form a rivet-shaped structure,the inner layer and the outer layer can be fully and effectively integrated, layering caused by insufficient bonding force between the inner layer and the outer layer of a steel strip pipe in futureuse is solved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of steel strip reinforced polyethylene spiral corrugated pipes, in particular to a manufacturing process of steel strip composite reinforced polyethylene spiral corrugated pipes. Background technique [0002] HDPE double-wall bellows, referred to as PE bellows, was first successfully developed in Germany in the early 1980s. After more than ten years of development and improvement, it has developed from a single variety to a complete product series. Due to its excellent performance and relatively economical cost, it has been greatly promoted and applied in developed countries such as Europe and the United States. Double-wall corrugated pipe is a new type of lightweight pipe made of high-density polyethylene. It has the characteristics of light weight, high pressure resistance, good toughness, fast construction, and long life. Its excellent pipe wall structure design is different from other structures. Compa...

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Problems solved by technology

[0003] The current corrugated pipe is usually divided into three layers, the inner layer is a continuous solid wall inner tube, the middle layer is an annular steel belt reinforcement, and the outer layer is an HDPE outer layer. The annular steel belt reinforcement in the prior art is directly coated with a steel belt. The pipe is directly produced after being bent into a spiral shape after molding. This process causes insufficient adhesion between the steel strip and the inner and outer layers, and it is easy to debond during use, so that the steel strip and the inner and outer layers cannot reach a state of coordinated stress.