Preparation method of efficient heat-preservation heat-insulation anti-corrosion aging bent pipe

Abstract

The invention discloses a preparation method of an efficient heat-preservation heat-insulation anti-corrosion aging bent pipe, and belongs to the technical field of bent pipes. The method comprises the steps that low-melting-point paraffin is adopted as filler of a metal inner cavity, then a metal straight pipe is subjected to stretch bending or winding bending to form the bent pipe in a preset shape, then the bent pipe with the outer side coated with a silicon dioxide aerogel felt is soaked in a special material and subjected to high-temperature curing, and finally a polyurea coating is sprayed to the outer side of the bent pipe. According to the preparation method, the problems that in the prior art, after a metal bent pipe is bent and formed, distortion such as serious sinking, protruding and wrinkling can happen to the section, and in the using process, the heat-preservation heat-insulation performance is poor, leakage is caused, and corrosion aging is prone to happening are solved, the bending and forming quality of the metal bent pipe is improved, and the heat-preservation heat-insulation performance, the leakage prevention performance and the corrosion aging resistance of the metal bent pipe are improved.

Description

technical field [0001] The invention relates to the technical field of bent pipes, in particular to a method for preparing a high-efficiency thermal insulation, anti-corrosion and aging bent pipe. Background technique [0002] Metal elbows are mainly used in gas and liquid transportation pipelines. Because metal elbows have a series of excellent characteristics such as high specific strength, light weight, and good heat dissipation performance, they are widely used in aviation, aerospace, ships, Automotive, national defense and other fields. [0003] The processing and forming of metal bent pipe fittings is mainly through the straight pipe clamped on the stretch bending machine or the bending machine to draw or bend it into a predetermined shape of the bent pipe. Under the action of compressive stress, the deformation is uneven, and there are serious depressions, protrusions, wrinkles and other distortions, which cannot meet the high-precision cross-sectional shape requirem...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-efficiency thermal insulation and anti-corrosion aging elbow preparation method, which overcomes the serious depression, protrusion, fold and other distortions in the cross-section of the metal elbow in the prior art after bending, and can be used in In the process, problems such as poor thermal insulation performance, leakage, and easy corrosion and aging have improved the bending quality of the metal elbow, and improved the thermal insulation performance, anti-leakage, and corrosion resistance of the metal elbow.