Powder-coating spraying gun

Abstract

The invention discloses a powder-coating spraying gun applied to the preparation of an inner coating of a pipeline and comprising a powder supply pipe, a sprinkle bracket, an adjusting bracket, a powder-merging cavity, a water-cooling sleeve and a water supply system. The sprinkle bracket is arranged at the front end of the powder supply pipe and connected with a sprinkle by the adjusting bracket; the powder-merging cavity is arranged at the rear end of the powder supply pipe; and the water-cooling sleeve is connected with the water supply system by the aid of a matched water-cooling joint seat. The spraying gun structure is also internally provided with an adjustable atomization-adjusting tube and an adjustable conical sprinkle to improve the atomization effect of the powder; the water-cooling sleeve can cool the powder-coating spraying gun in real time, and the powder deposited on the inner wall of the spraying gun can not be caked or melted, thereby improving the powder-spraying effect. The powder-coating spraying gun has good popularization and use values.

Description

technical field [0001] The invention relates to a spray gun, in particular to a powder coating spray gun for making inner coatings of pipelines. Background technique [0002] At present, in the field of oil pipeline inner coating anticorrosion, powder coating has a tendency to gradually replace liquid coating due to its excellent characteristics such as environmental protection, safety, and less volatile gas, especially for oil pipelines. The demand for powder coating is increasing . The powder inner coating of petroleum pipelines generally adopts hot-melt spraying, that is, the powder spray gun is inserted into the pipe body, and the powder is sprayed onto the inner wall of the high-temperature pipeline. The powder melts at high temperature and adheres to the inner wall of the pipe. The powder coating spray guns currently used are frequently extended into the high-temperature pipe body, and the powder in the spray gun will be heated due to the conduction of temperature, so...

AI Technical Summary

Problems solved by technology

The powder coating spray guns currently used are frequently extended into the high-temperature pipe body, and the powder in the spray gun will be heated due to the conduction of temperature, so that the powder will melt before it is sprayed out, and adhere to the inner wall or nozzle of the spray gun, resulting in some Or the spray gun is completely blocked, and the spray gun must be cleaned frequently, which affects the powder spraying effect and work efficiency; and the poor atomization effect of the powder sprayed from the nozzle leads to uneven coating, which affects the coating quality

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