Manufacturing technology and equipment for steel lining polyurethane composite tube

Abstract

The invention discloses manufacturing technology and equipment for a steel lining polyurethane composite tube. The manufacturing technology for the steel lining polyurethane composite tube comprises the steps of removing rust from the inner wall of the steel tube; smearing an adhesive; preparing a polyurethane sizing material; then injecting into the steel tube; carrying out centrifugal casting; vulcanizing at a constant temperature; and finally obtaining the steel lining polyurethane composite tube. The equipment for realizing the production technology comprises the steel tube, shield caps, a base, brackets, a heat preservation device and a centrifugation device. By the centrifugal casting, the lining and the steel tube are combined tightly; the fall-off phenomenon of the lining during a using process of the steel lining polyurethane composite tube can be significantly reduced; the lining thickness is adjusted by controlling the amount of added raw materials in the casting process; the centrifugal casting prevents the problem of non-uniformity of the lining thickness and increases casting quality; and the centrifugation device can adjust the rotation speed of processing tubes and can meet production technology requirements of different centrifugal degrees.

Description

Technical field [0001] The invention relates to a manufacturing process of a composite pipe, in particular to a manufacturing process of a steel-lined polyurethane composite pipe. [0002] The invention also relates to a steel-lined polyurethane composite pipe pouring equipment. Background technique [0003] The full name of polyurethane is polyurethane, which is a general term for macromolecular compounds containing repeating carbamate groups on the main chain. It is formed by addition polymerization of organic diisocyanate or polyisocyanate and dihydroxy or polyhydroxy compound. The inner lining of the steel-lined polyurethane composite pipe is an elastomer with a symmetrical molecular structure, which is non-polar to the outside, with a smooth surface and good elasticity, which can prevent the adhesion of scale layers. The polyurethane lining has good elasticity. When it is impacted by the medium, the polyurethane is forced to be compressed under the action of external force. ...

AI Technical Summary

Problems solved by technology

There are two major problems in the existing technology including the above-mentioned manufacturing process: first, after the inner lining is formed, the thickness deviation cannot be adjusted; Combined, the lining is prone to fall off when in use

[0005] The manufacturing equipment of the steel-lined polyurethane composite pipe matches the manufacturing process. Correspondingly, there is also the problem that the quality of the manufactured products cannot be guaranteed.

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