Controllable paint supply device for detecting performance of color-coated sheet

The utility model discloses a controllable paint supply device for color-coated sheet performance detection, which comprises a base, an outer cylinder arranged at the top of the base, an inner cylinder and a transfer box arranged at the bottom of an inner cavity of the outer cylinder, a supporting rod arranged at the top of the outer cylinder, a supporting plate arranged at the top of the supporting rod, and a driving motor arranged in the middle of the top of the supporting plate, a communicating pipe connected with the top of the transfer box is arranged at the bottom of the inner barrel, a first electromagnetic valve is arranged on the communicating pipe, a connecting wire is arranged in an inner cavity of the transfer box and fixed to the bottom of the transfer box, the other end of the connecting wire is connected with a floating block, and a laser ranging sensor is arranged at the top of the floating block; a discharging pipe extending out of the outer barrel is arranged at the bottom of the transfer bo