A kind of anti-corrosion water supply pipe

Abstract

The invention relates to the technical field of pipelines, and discloses an anti-corrosion water supply pipeline. The pipeline comprises a metal pipeline and coatings located on the inner wall of themetal pipeline, wherein the coatings comprise an epoxy resin coating and a water-based polyurethane coating, and the epoxy resin coating is located between the metal pipeline and the water-based polyurethane coating. The inner layer of the metal pipeline is coated with the coatings to prevent corrosion medium in the water supply pipeline from being in contact with the metal pipeline, so that the corrosion resistance of the water supply pipeline is achieved; epoxy resin is selected for coating the inner wall of the water supply pipeline due the fact that the epoxy resin and metal have relatively good bonding strength; the water-based polyurethane coating is a water-based coating, the solvent of the coatings is water and is green and environment-friendly, and the organic solvent cannot be released into water body, so that the water body is prevented from being polluted; and in addition, the polyurethane coating has high compressive strength and can bear the pressure effect of water in the water supply pipeline.

Description

technical field [0001] The invention relates to the technical field of pipelines, in particular to an anti-corrosion water supply pipeline. Background technique [0002] The water supply network is a pipeline network system with a complex structure and a large scale. It is one of the important infrastructures of the city, the artery in the water supply system leading to the user, and an indispensable part of ensuring people's life and production. The application time of my country's pipe network is generally lower than that of foreign developed countries. Compared with developed countries, some cities in my country have a much higher average leakage loss per unit pipe length. Cast iron is a carbon-iron alloy with a carbon content of more than 2%. It has good mechanical properties, low price and easy casting, so it is widely used in water supply and drainage pipe networks, but there is a serious problem with cast iron. Corrosion resistance is poor. Iron water supply pipelin...

AI Technical Summary

Problems solved by technology

Cast iron is a carbon-iron alloy with a carbon content of more than 2%. It has good mechanical properties, low price and easy casting, so it is widely used in water supply and drainage pipe networks, but there is a serious problem with cast iron. poor corrosion resistance

Iron water supply pipelines will experience serious corrosion during the water supply process. For corroded pipelines, on the one hand, the water quality will be affected by the production of corrosion products, and on the other hand, the accumulation of corrosion products in the pipeline will lead to a decline in water delivery capacity and energy consumption. Corrosion will cause corrosion nodules on iron water supply pipelines, resulting in thinning, perforation, and rupture of pipe walls, resulting in reduced pipeline strength, and easy to cause leakage and pipe bursts

Moreover, the quality of most of the gray cast iron pipes that have been installed for a long time does not meet the national requirements. In addition, the quality of pipe network fittings is poor and the interface technology is backward, resulting in low corrosion resistance of the pipes, scale formation and serious corrosion after long-term use; compressive strength Low, leakage accidents occur frequently, and pipeline network leakage increases year by year

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