Automatic spraying device and spraying method

Abstract

The invention discloses an automatic spraying device, which comprises a support, a powder groove, at least one outwards spraying gun and an inwards spraying gun. The powder groove is arranged on the support, the outwards spraying guns are fixed on two sides of a roller rack on the support, an arched groove cover is arranged on the powder groove, when opened, the groove cover slides to the bottom of the powder groove, when closed, the groove cover slides to a space above the powder groove, the outwards spraying guns are sealed in the groove cover, an air inlet is arranged on one side of the powder groove, a powder recycling inlet is arranged at the bottom of the powder groove and is connected with a powder recycling device, and air curtain machines are arranged above the two ends of the powder groove. The invention further discloses a method adopting the device to spray. The powder groove is provided with the arched groove cover, the air curtain machines are arranged above the two endsof the powder groove, so that a sealing purpose is achieved, powder cannot fly outwards in a spraying process, and powder recovery rate reaches 90%. The difficult problem of difficulty in powder recovery, which always troubles the spraying industry for a long time, is resolved.

Description

technical field [0001] The invention relates to an automatic spraying device, in particular to an automatic spraying device for spraying the inner and outer surfaces of steel pipes, and also relates to a spraying method using the spraying device. Background technique [0002] Due to the influence of factors such as the external environment and practical conditions, it is necessary to spray one or several layers of protective film on the inner and outer surfaces of the steel pipe. This requires the use of various spraying devices. At present, the spraying device on the market has the device that carries out external spraying to steel pipe, also has the device that carries out internal spraying to large diameter steel pipe. Although some of these spraying devices are equipped with powder recovery pipes, 80% of the powder cannot be recovered when the steel pipe is sprayed outside. This wastes paint on the one hand, and causes environmental problems in the spraying workshop on...

AI Technical Summary

Problems solved by technology

Although some of these spraying devices are also equipped with powder recovery pipes, 80% of the powder cannot be recovered when the steel pipe is sprayed outside. This wastes paint on the one hand and causes environmental problems in the spraying workshop on the other hand.

In addition, manual spraying is usually used for calibers below DN50. Due to the small caliber, automatic spraying cannot be realized, the coating is uneven, and the spraying speed is slow.

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