Automatic drainage device for compressed air pipeline

The utility model discloses an automatic drainage device for a compressed air pipeline, which comprises a water collecting tank, a cover plate arranged at the top of the water collecting tank, a connecting sleeve mounted at the top of the cover plate, a foot support fixedly connected with the bottom of the water collecting tank, a drainage pipe communicated with the front side of the water collecting tank, and a pressure control device and a round floating ball mounted on the inner side of the water collecting tank respectively. The pressure control device penetrates through the inner side of the round through floating ball, a connecting port is formed in the inner side of the round through floating ball, and clamping plates are arranged on the two sides of the connecting port, and the problem that in the manual water drainage process of an existing pressure ventilation pipeline water drainage device, workers need to operate independently, and consequently many potential safety hazards exist is solved. 本实用新型公