DEVICE FOR CLEANING INTERNAL SIDE OF PIPE LINES Russian patent published in 1995 - IPC

FIELD: cleaning surfaces of pipe lines. SUBSTANCE: device has housing provided with the lateral baffle. Two receivers are arranged from one side of the baffle. The receivers are defined by longitudinal baffle positioned inside the housing and have inlet openings and charging passageways of different capacity. The cylinder provided with nozzles and differential piston is positioned from the other side of the lateral baffle. The differential piston has air-chamber and air-supplying pipe and provided with valve surface for interacting with the wall edge of the gate valve chamber. The chamber is made in the lateral baffle. Two stop valves are also arranged from the other side of the lateral baffle. The valves have shanks and received in the valve chambers made in the lateral baffle. The valves are spring-loaded in the direction of the receivers. The ratio of diameters of the valves is presented in the invention description. EFFECT: improved quality of cleaning. 3 dwg