Well water extraction system - has suction passage wall resistance decreasing in stages from top

摘要

The water-extraction system from a well uses a well tube and a pump inside it drawing in water via a suction passage wall. Flow distribution is controlled by a single-skinned pipe, and the lateral flow resistance of the passage wall decreases in stages from top to bottom. - There can be a hollow cylindrical suction passage (40) connected to the pump inlet, the well water flowing through its wall against a predetermined resistance. The passage size and flow resistance characteristics are designed to suit the well.