HYDRAULIC PULSE-TYPE DIAPHRAGM PUMP Russian patent published in 1999 - IPC

FIELD: equipment for pumping of contaminated liquid, such as mud, concrete, mortar. SUBSTANCE: pump has double-sectioned hydraulic pulsator jig, two pipes connected to hydraulic pulsator jig, flexible tubular diaphragms disposed in pipes, suction and delivery valves. Hydraulic pulsator jig has inner and outer eccentrics mounted one above the other and equipped with mechanism providing movement of one eccentric relative to other eccentric. Suction and delivery valves are made light-weight and composed of resilient enclosures with cores within them. Pump is made small-sized and high-speed, with suction valves being opened by high-pressure liquid and soft landing being provided due to increased shock-absorption. Pump capacity is controlled in stepped or automatic mode of control. EFFECT: increased efficiency and enhanced reliability in operation. 4 cl, 4 dwg