Paint flow control device

Abstract

The invention discloses a paint flow control device. The paint flow control device comprises a paint supply pump and an automatic spray gun, wherein a discharge end of the paint supply pump is connected with an impeller conveyor; one end of the impeller conveyor is connected with the paint supply pump through a pneumatic butterfly valve; the other end of the impeller conveyor is connected with the automatic spray gun through a paint delivery pipe; a flow meter and a precision flow regulator are also arranged on the paint delivery pipe; the precision flow regulator comprises a trace cone valve and an electronic range finder which is arranged on a cone valve adjusting rod. According to the flow control device, high-precision paint flow control is achieved; the paint can be stably output at a micro flow; and meanwhile, linear control on the paint flow under the high-precision micro flow output can be achieved.

Description

technical field [0001] The invention relates to the field of painting processing equipment, in particular to a paint flow control device. Background technique [0002] In the surface coating treatment process, we often encounter the situation of micro-spraying. There are no more than two commonly used solutions. One is to adjust the opening and closing degree of the flow adjustment valve of the spray gun during the spraying process; A flow control valve (FCV) is installed on the delivery pipeline, and the flow of the paint in the pipeline is controlled by the air pressure through the diaphragm in the FCV. These two methods have their own characteristics, but both have the defect of inaccurate micro-flow control: [0003] Although the adjustment of the spray gun is simple, due to the limitation of the structural design of the flow adjustment valve of the spray gun, the flow adjustment cannot be continuously adjusted, but can only be performed in a jumping flow control mode; ...

AI Technical Summary

Problems solved by technology

These two methods have their own characteristics, but both have the defect of inaccurate micro-flow control:

[0003] Although the adjustment of the spray gun is simple, due to the limitation of the structural design of the flow adjustment valve of the spray gun, the flow adjustment cannot be continuously adjusted, but can only be performed in a jumping flow control mode; and the accuracy of the adjustment valve on the spray gun is limited. It is impossible to achieve continuous precision flow control in this way, but the spraying amount will change sharply due to the instability of the manual control regulating valve, which will affect the spraying effect

[0004] The method of installing FCV on the pipeline can achieve a relatively fine flow control to a certain extent, but due to the limited adjustment range of the diaphragm in the FCV, output hysteresis is prone to occur, and the accuracy of micro output is not good. During the period of time, the flow rate will be high and low, and it is difficult to cope with high-precision output control

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