PUMP FOR WATER LIFTING FROM WELLS (SOLAR PUMP) Russian patent published in 1997 - IPC

FIELD: hydraulic systems using solar energy to lift water from wells. SUBSTANCE: pump has black heat chamber closed with cover double-covered with glass. Chamber turns into suction piping accommodating valve. Delivery piping with valve is branched off it upstream of suction piping valve. Air heated in heat chamber by solar radiation expands and closes valve in suction piping at the same time opening that in delivery piping; in the action, some portion of water goes up over delivery pipe. Pump is provided with closed-cooling-cycle isobutane or ammonia line for controlling suction piping valve that has evaporator and condenser. Suction-piping valve has piston actuator. Working medium is expanded in evaporator mounted in heat chamber under the action of high temperature and sets in motion piston actuator whose working space starts communicating with closed-cooling-cycle line. This opens valve in suction piping. Then working medium goes through condenser placed below water level in suction piping, cools down, and condenses. In the process, valve closes and working medium is passed to evaporator. Then cycle is repeated. EFFECT: simplified design. 1 dwg