Vacuum pump control apparatus for an evacuating type waste water

Details Vacuum pump control apparatus for an evacuating type waste water Vacuum pump control apparatus for an evacuating type waste water

1994-09-30

1996-01-30

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417 12, 417 36, 137205, F04B 4102, F04B 4902

Patent

active

054876460

ABSTRACT:
A vacuum pump control apparatus for an evacuating-type waste water collecting system is disclosed. In the system, waste water discharged from houses and facilities is collected into a water collecting tank by vacuum sewer pipes provided with a negative pressure therein, and the waste water collected in the water collecting tank is discharged by a booster pump while the air in the water collecting tank is discharged by a vacuum pump. The vacuum pump control apparatus comprises a gas-liquid ratio detection arrangement for detecting the ratio of the amount of air to the amount of waste water to be collected into the water collecting tank, and a control system for regulating the operating time of the vacuum pump based upon the gas-liquid ratio detected by the gas-liquid ratio detecting arrangement, so that a target value of the gas-liquid ratio is recovered when it falls below the target value. By this apparatus, the gas-liquid ratio within the vacuum sewer pipes is kept to an ideal value to thereby prevent an air lock from forming in the vacuum sewer pipes.

REFERENCES:
patent: 1447854 (1923-05-01), Jennings
patent: 2791964 (1957-05-01), Reeve

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