Patent ID: 6053702
Filing Date: 2000-04-25
Classification: F04D

Abstract:
A booster water pump for increasing a source water pressure to a high water pressure for industrial use, the booster water pump comprising:an elongated tubular hollow cylinder having both ends closed, a cylinder inlet port is located in one end, and a flange is located in an opposite end with a cylinder outlet port disposed therein wherein the hollow cylinder is capable of being filled with the source water;a submersible motor and hydroturbine pumping unit is arranged so that a plurality of turbine impellers are disposed adjacent the motor with a turbine outlet facing away from the motor, the submersible motor and hydroturbine pumping unit is configured for insertion in the hollow cylinder, and is disposed in the hollow cylinder having a water annular passageway disposed therearound between the hollow cylinder and the submersible motor and hydroturbine pumping unit, the turbine outlet is attached inside the hollow cylinder to the cylinder outlet port;the booster water pump having:a water inlet pipe is attached outside the hollow cylinder to the cylinder inlet port;a water outlet pipe is attached outside the hollow cylinder to the cylinder outlet port;a coupling means is disposed for connecting a source water line to the water inlet pipe;an automatic bypass line having a first end is connected to and opens into the water inlet pipe and a second end is connected to and opens into the water outlet pipe;the booster water pump further having a pressure control means comprising:a bypass relief valve configured with an inlet communicating with the water outlet pipe and an outlet communicating with the automatic bypass line to maintain an operating pressure;a flow switch is disposed in the water inlet pipe for starting the pump in response to the flow of source water through the water inlet pipe, the flow switch further operably maintains a predetermined flow rate through the water outlet pipe upon starting of the pump;a pressure control switch, said flow switch in combination with a pressure switch is adapted to turn on the pump when discharge line pressure drops below the operating pressure, the pressure switch is disposed in one of: the bypass line and the outlet pipe downstream from the bypass relief valve; and,at least one check valve for separating the high water pressure from the lower pressure source water.