VOLUME FLOWMETER Russian patent published in 2015 - IPC G01F3/00 

FIELD: instrumentation.

SUBSTANCE: invention relates to device engineering, in particular to the devices for volume flowrate measurements of liquid and gaseous materials in flow, and is intended for use in chemical, oil and gas, mine, medical, food and other industries, as well as in municipal economics and agriculture, where the accurate measurements of volumes are required at low flows. The volume flowmeter contains control assembly comprising two hemispheres, gage tank, fixing panel for control assembly and gage tank, counting gear secured on the gage tank, three-channel control membrane located in the control assembly between its hemispheres, measuring membrane in form of the corrugated chamber, i.e. bellows-like sensing element, by turns filling the internal volume of the gage tank in one and opposite direction, pipelines connecting the control assembly and the gage tank, supplying nozzle, removal nozzle, outlet and by-pass valves, connected to the control membrane by the connecting membrane (outlet valves are installed spring-loaded in the valve socket of the control casing), follower, its bottom part is secured to the internal side of the gage tank by means of the follower membrane, and top interacts with the lever of the counting gear via the crank link. The three-channel control having three channels - supplying and two removal, is installed in the control assembly in pre-compressed state.

EFFECT: increased accuracy of flowrate measurements.

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