Drainage pump station and drainage operation method for drainage

Details Drainage pump station and drainage operation method for drainage Drainage pump station and drainage operation method for drainage

1995-09-14

1998-05-19

Graysay, Tamara L.

Hydraulic and earth engineering

Fluid control, treatment, or containment

405 36, 405 37, 405 80, 1372361, 210170, F02B 1100

Patent

active

057527857

ABSTRACT:
In a drainage pump station, a driving machine has a capacity greater than a shaft power necessary for no-discharge operation of a pump, and during severe flooding the pump is operated at an overload exceeding its design capacity. During maintenance operation water is fed from a river on the delivery side of the pump station into the station. When an inflow of rainwater into the pump station is great the pump is operated at the necessary capacity, when it becomes small the water level is kept above a rated value, and when the inflow rate is zero the pump discharge is increased to a capacity at which sediment can be discharged. A suction blower is disposed at the top of a suction sump and interstage valves are disposed in entrances of vertical shafts to effect efficient ventilation of the underground waterway. A feed channel is operated as a pressure channel and the pump is of variable capacity and the water level in the underground waterway is controlled to be constant.

REFERENCES:
patent: 4036023 (1977-07-01), Matsumoto et al.
patent: 4332507 (1982-06-01), Wakamori et al.
patent: 5160216 (1992-11-01), Takada et al.
patent: 5228802 (1993-07-01), Kuwabara et al.
patent: 5287875 (1994-02-01), Otani
patent: 5360290 (1994-11-01), Yamada et al.
patent: 5487621 (1996-01-01), Takada et al.
Article entitled "Deep Underground Water Drainage Channel Water Drainage Pump System", Turbo Machines, vol. 21, No. 10, pp. 23-29 Oct. 1993.

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