SU1072924A1 - Line for painting by spraying - Google Patents

Abstract

A SPRAY COLORING LINE, comprising a surface preparation unit with degreasing and rinsing devices and flushing baths installed in them and a spray booth with a hydro-filter and bath, characterized in that, in order to reduce water consumption, the coloring line is connected to the flushing through the pressure pipe. the bath is equipped with a water tank installed above the water level in the painting chamber bath and an overflow pipe connected to it connected to the float valve. tc; about to j;

Description

The invention relates to equipment) for painting products by spraying and can be used in any industry. . A known painting line, including the unit for preparing the surface of the product, a spray booth with a hydraulic filter and a bath and a conveying device [1].

A disadvantage of the known line is the increased consumption of pure water in the hydraulic filter of the spray booth.

The closest to the invention in technical essence and the achieved result is a spray painting line, including a unit for surface preparation of the product with degreasing and washing devices and washing baths installed in them and a spray painting chamber with a hydraulic filter and a bath [2]. In a known line, the surface preparation unit consumes process water for washing products after processing them with an alkaline degreasing composition. At the same time, the spray booth uses water in hydrotreating devices and requires constant addition of water to the hydrofilter baths to replace it instead of being carried away with suction air.

Water after washing the products in the preparation unit, having reached the maximum degree of saturation with alkali, is discharged into the sewer and is no longer involved in the technological process. Therefore, fresh water is constantly / supplied to the line in the washing zone of the surface preparation unit and in the bath of the hydraulic filters of the spray painting chamber. Water consumption reaches 20,000 l / h, which leads to high financial costs, and in areas experiencing a lack of water, to the inability to use the line.

The purpose of the invention is the reduction of water consumption.

The goal is achieved by the fact that the spray painting line, including the unit for surface preparation of the product with degreasing and washing devices and the washing baths installed in them, and the spray painting chamber with a hydraulic filter and a bath, is equipped with a water collector connected above the level connecting to the flushing bath with a water collector installed above the level water in the bath of the painting chamber, and an overflow pipe connected to it, associated with a float valve located in the bath.

Thus, instead of pure water, water is added to the bath of the spray booth from the rinse bath of the washing device of the product surface preparation unit. This is possible because water! from the wash bath does not contain mechanical impurities and can be used in hydraulic filters. In addition, it contains alkali, which contributes to coagulation of the paint and facilitates its separation from the cleaned air, as well as the subsequent cleaning of the chamber from the paint.

The drawing schematically shows a line, a General view;

The line contains a surface preparation unit 1 with a degreasing device 2 and washing devices 3, in which washing baths are installed 4. The line also includes a spray painting chamber 5 with a hydraulic filter 6 and a bath 7.

The line is equipped with a water collector 8 located on the roof of the unit 1 for preparing the surface of the product. The water collector 8 is in communication with the washing bath 4 of the washing device 3 through the pressure pipe 9 and is installed above the water level in the bath 7 of the painting chamber, which is connected to the overflow pipe 10. In the bath 7 of the painting chamber, a float valve 11 is connected to the overflow pipe 10.

A pump 12 and a valve 13 are installed on the pressure pipe 9.

The sump 8 has a drain hole 14 for draining excess water into the wash bath 4 of the washing device 3. The unit 1 and the spray painting chamber 5 are made with drain systems 15 and 16.

The line is as follows.

The processed products move the conveyors through the degreasing device 2 and washing 3 of the surface preparation unit 1. Then the products are sent to the spray booth 5, where the coating is applied. Moreover, in the flushing device 3, the flushing water is pumped by pump 12 from the flushing bath 4 into the dipping circuits (not indicated) and into the water collector 8. The amount of water supplied to the water collector 8 is controlled by valve 13. This amount is set during operation of the line. As water is consumed in the bath 7 of the painting chamber 5, the float valve 11. lowers, allowing water to be accessed from the catchment 8, which flows through the overflow pipe 10 into the bath 7 by gravity, since the catchment 8 is installed above the water level in the bath 7 of the painting chamber 5. After reaching the required water level, the valve 11 blocks the access of water to the bath 7. Excess water from the reservoir 8 through the drain hole 14 enters the wash bath 4 of the washing device 3.

The use of this invention will provide improved operational characteristics of the line by improving the quality of air purification and saving clean water.

The expected economic effect will be about 2 thousand rubles. in year.

Claims (1)

, SPRAY PAINTING LINE, including a unit for surface preparation of the product with degreasing and washing devices and rinsing baths installed in them and a spray booth with a hydraulic filter and a bath, characterized in that, in order to reduce water consumption, the painting line is provided with a rinsing unit connected through the discharge pipe the bath of the washing device with a water collector installed above the water level in the bath of the painting chamber and connected to it by an overflow pipe connected to the float to a lapan.