Pump control system

Details Pump control system Pump control system

1979-12-06

1982-07-27

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

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

417 38, 417 45, 417 63, F04B 4106, F04B 4906

Patent

active

043415040

ABSTRACT:
A bubbler tube is used to sense the liquid level in a wet well. Controls provide a constant flow of air, approximately 11/2 to 1 cubic foot per hour, through the bubbler tube which extends to about 6 inches above the top of the pump suction pipe. The pressure in the pipe is proportional to the height of the liquid above the bottom of the bubbler pipe. A transducer connected in the bubbler system responds to pressure changes in the pipe which are transformed to electrical signals used to control the speed of the pump driving motor. The motor will always drive the pump at a speed which corresponds to the flow coming into the wet well.

REFERENCES:
patent: 2314421 (1943-03-01), Peterson
patent: 3292547 (1966-12-01), Ward
patent: 3424090 (1969-01-01), Hyde
patent: 3520638 (1970-07-01), McUmber et al.
patent: 3741683 (1973-06-01), McTamaney et al.
patent: 3751185 (1973-08-01), Gottliebson et al.

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