Apparatus for flushing through systems of thin hydraulic pipes and similar pipes

摘要

PCT No. PCT/FI87/00138 Sec. 371 Date Feb. 28, 1989 Sec. 102(e) Date Feb. 28, 1989 PCT Filed Oct. 20, 1987 PCT Pub. No. WO88/03065 PCT Pub. Date May 5, 1988.The invention relates to an apparatus for flushing a hydraulic small-diameter pipe system or the like. Two pressure accumulators (33a and 33b) are arranged at one end of the pipe system (20), connectable alternately to the pipe system and to a tank (39), for receiving a volume of liquid corresponding to volumes of gas and liquid, respectively, which are alternately introduced into the opposite end of the pipe systems for filling the pipe system with alternating columns (42, 43) of flushing liquid and compressed gas, and on achieving a predetermined pressure in the pipe system, the pipe system is opened into a receiving tank, whereby the compressed gas is suddenly expanded and drives a forceful flushing pulse through the pipe system.