| 摘要 |
The flow regulating means includes a regulator shell having a tangentally placed inlet tube at its lower closed end, the upper end being open. The shell is submerged at a level below the normal level of the liquid to be pumped. The shell receives a concentrically disposed suction pipe connected with the intake of a centrifugal pump. In the exercise of the method, when the level of the liquid body is above the shell a predetermined distance, the liquid is drawn downwardly in the shell around the suction pipe, then upwardly through the suction pipe with minimal turbulance so that the pump operates at maximum capacity. When the liquid approaches the top of the shell, an increased volume of liquid enters the tangent inlet tube to produce a vortex which increases in force as the liquid level subsides to cause proportionately decreasing pump capacity, tending to produce an equilibrium between liquid input and pump output.
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