Paint control valve of automatic spraying system

The utility model discloses a paint control valve of an automatic spraying system, and the paint control valve is used for the production of a burr cylinder liner of an engine. The paint control valve is characterized by comprising a pedestal, an upper bracket, a single-acting preshrunk air cylinder, a briquetting and a pipe clamp, wherein the bottom end of the upper bracket is fixedly connected to the pedestal; the single-acting preshrunk air cylinder is uprightly and fixedly arranged on the upper bracket and a piston rod is downward; the briquetting is fixed at the bottom end of the piston rod; a space capable of accommodating a paint pipe is arranged between the undersurface of the briquetting and the top surface of the pedestal; and the pipe clamp consists of connection plates on the two sides and an arc clamping plate in the middle, and the connection plates on the two sides are connected to the pedestal through bolts. In the paint control valve, connection and disconnection of paint are controlled in a