Variable gate flow analyzing method and apparatus

Measuring and testing – Volume or rate of flow – Weir type

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G01F 152

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active

052750426

ABSTRACT:
To measure flow rates, the cross-sectional shape of the flow path is changed by inserting a multiple position gate into the flow path and altering the position of the gate to maintain the head of liquid constant with a reduced flow cross section. To maintain the head at a desirable range, the depth is measured and controls the position of the gate as a feedback signal. The position of the multiple position gate is correlated with the depth to provide an indication of flow rate. For this purpose, a flow path housing is clamped to a pipe and a multiple position gate is moved by pneumatic pressure into the flow stream to change the flow cross section. The depth of the head upstream of the gate is measured and the position of the gate is measured. Flow rate is determined from these two measurements. Sampling may be performed at an increased depth caused by the gate.

REFERENCES:
patent: 1081246 (1913-12-01), McCall
patent: 1258867 (1918-03-01), Burnham
patent: 1813100 (1931-07-01), Swindle
patent: 2544948 (1951-03-01), Caldwell
patent: 2606445 (1952-08-01), Eckman
patent: 3412612 (1968-11-01), Carr
patent: 4375169 (1983-03-01), Torresin
patent: 4476707 (1984-10-01), Burns et al.
patent: 4896542 (1990-01-01), Hunter
Ideas/Applications in Engineering and Design vol. 1g No. 12 p. 241 Dec. 1975 copy.

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