초록 ▼

A dewatering pump assembly for water pumping apparatus for pumping water from excavations or other holes in the ground and upwardly to a more or less remote discharge area. The apparatus finds particular utility for use, for example, by contractors, utility companies, or the like, and includes a pow

A dewatering pump assembly for water pumping apparatus for pumping water from excavations or other holes in the ground and upwardly to a more or less remote discharge area. The apparatus finds particular utility for use, for example, by contractors, utility companies, or the like, and includes a power source, preferably mobile or easily transportable, such as an internal combustion engine or an electric motor or other power sources. A pressure fluid tank assembly and a pressure fluid pump is connected directly to the power source, and a water pump assembly is located down in the water at the bottom of the hole or excavation and includes a housing in which an impeller, a fluid motor, and the connecting drive shaft all are located. The fluid pressure pump which is driven directly by the power source is connected by long flexible conduits to the motor of the pump assembly. The pump assembly includes a heat exchanger which is secured on the lower end of assembly and the pressure fluid conduits act to convey a portion of the pressure fluid to and from the heat exchanger to thereby cool the pressure fluid. The heat exchanger is located strategically in the water being pumped to thereby efficiently transfer heat from the pressure fluid to the water being pumped.

대표청구항 ▼

Dewatering pumping apparatus comprising, a power source, a fluid tank assembly including a pressure fluid pump connected to and driven by said power source, a pump assembly for being located in a hole to be dewatered and including a housing having a lower end, a pressure fluid motor carried by said

Dewatering pumping apparatus comprising, a power source, a fluid tank assembly including a pressure fluid pump connected to and driven by said power source, a pump assembly for being located in a hole to be dewatered and including a housing having a lower end, a pressure fluid motor carried by said housing, fluid conduits connected between said motor and said tank assembly for conducting pressure fluid therebetween to drive said motor, an impeller in said housing and connected to said motor for being rotationally driven by said motor to thereby pump water from said hole, said pump assembly having a heat exchanger fixed to said lower end of said housing and including a chamber for receiving pressure fluid, and conduit fluid means connecting said, fluid motor and said heat exchanger.