A pipeline electrostatic spraying process

Abstract

The invention discloses a pipeline electrostatic spraying process and belongs to the field of pipeline production processes. According to the technical scheme, the pipeline electrostatic spraying process comprises the following steps: 1, pretreatment, 2, pipeline installation, 3, spraying of primer, 4, electrostatic primer coating, 5, ventilation, 6, drying, 7, spraying of finish paint, 8, electrostatic spraying of finish paint, 9, ventilation, 10, drying and 11, removing of a pipeline, specifically, in the step 2, the pipeline is placed in a spraying tool via an opening in the lower end of the spraying tool, and the pipeline divides the space in the spraying tool into a first cavity and a second cavity which do not communicate; and in the step 3, inner wall primer paint is sprayed to thefirst cavity through a first electrostatic spray gun, and outer wall primer paint is sprayed to the second cavity through a second electrostatic spray gun. The pipeline electrostatic spraying processhas the effect of improving the protective effect of the paint.

Description

technical field [0001] The invention relates to a pipeline production process, more specifically, it relates to a pipeline electrostatic spraying process. Background technique [0002] A pipeline is a device used to transport gas, liquid or fluid with solid particles connected by pipes, pipe connectors and valves. Because the inner wall of the pipeline is in contact with the fluid it needs to transport, while the outer wall is in contact with air, moisture and soil, so the media in contact with the inner and outer walls of the pipeline are different. In order to protect the pipeline more effectively, the inner and outer coatings of the pipeline are different. [0003] At present, the electrostatic spraying method is commonly used. When spraying paint on the outer wall of the pipeline, the paint uses the nozzle to make it float in the air in the form of mist and spread in the air. During the spraying process, the paint is charged, and then charged under the action of an exter...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the paint diffuses in the air in a mist state, and may spread to the inner wall of the pipeline to cause the inner wall of the pipeline to be contaminated with paint on the outer wall, which in turn causes the coating on the inner wall of the pipeline to be polluted, making the coating on the inner wall of the pipeline contaminated. The protective effect of the pipeline is reduced

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