COMBINATION PUMPING UNIT Russian patent published in 2002 - IPC

FIELD: hydraulic machine building. SUBSTANCE: proposed pumping unit is designed for transportation of liquid at high pressure built by centrifugal pump liquids of high specific weight such as abrasive hydraulic mixtures. Unit has separation chamber block with separator of liquids and valve box connected with chambers, and also pump for delivering working liquid. Centrifugal pump is used as pump to deliver working liquid. Liquid separator is made in form of tubular elastic rolling diaphragm one end of which is clamped in joint between flanges of separation chamber cylinders and other end is hermetically secured in holder. First provides smooth delivery of working liquid, and second, reliably separates spaces of handled and working liquids. Invention provides transportation of handled liquid at high pressure over considerable distances. EFFECT: improved operation reliability of unit. 3 cl, 4 dwg