Measuring and testing – Volume or rate of flow – Combined
Patent
1989-06-09
1992-08-11
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Combined
G01F 1500
Patent
active
051368820
ABSTRACT:
A flow rate measuring apparatus includes a measuring pipe in which a fluid to be measured flows, a flowmeter for measuring a flow rate of the fluid to be measured flowing in the measuring pipe, and a cleaning flow generator for removing an adhesive substance in the measuring pipe by using the fluid to be measured, thereby correctly performing flow rate measurement by the measuring pipe. When the flowmeter is an electromagnetic flowmeter, the cleaning flow generator prevents the adhesive substance from resistively connecting electrodes for induced electromotive force detection. When the flowmeter is an ultrasonic flowmeter, the cleaning flow generator prevents the adhesive substance from interfering with transmission of an ultrasonic wave in the measuring pipe. The cleaning flow generator removes the adhesive substance by performing at least one of injecting the fluid to be measured into the measuring pipe, narrowing a flow path of the fluid to be measured to increase a flow rate of the fluid to be measured in the measuring pipe, inflating a balloon in the measuring pipe, injecting a cleaning agent in the measuring pipe, turning the fluid to be measured, and charging a high-pressure gas into the flow path of the fluid to be measured.
REFERENCES:
patent: 1813100 (1931-07-01), Swindle
patent: 1827727 (1931-10-01), Blizar
patent: 2020194 (1935-11-01), Kuhlmann
patent: 2862522 (1958-12-01), Yost
patent: 3409031 (1968-11-01), Benbow et al.
patent: 3834232 (1974-09-01), Gruner et al.
patent: 4379873 (1969-11-01), Hermanns
patent: 4543191 (1985-09-01), Stewart et al.
Goldstein Herbert
Kabushiki Kaisha Toshiba
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