| 摘要 |
A pumping system is disclosed comprising a supply pipe, a delivery pipe, a pump capable of pumping a liquid, a first tank with a top port and a bottom port, a second tank with top port and a bottom port, a first pipe switcher operable to switch connections the supply/delivery pipes and the top ports, and a second pipe switcher operable to switch connections between the bottom ports and the pump inlet/outlet. The pipe switchers serve to switch input and output connections such that the tanks are swapped from a position between the supply pipe and the pump inlet and a position between the pump outlet and the delivery pipe. Uses for cooling systems, air compressors, deep wells, and oil extraction are also disclosed.
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