GAS FLOWMETER Russian patent published in 2002 - IPC

FIELD: gas transportation. SUBSTANCE: gas flowmeter is installed in main pipe-line, it has inlet cylindrical part with cellular straightening vane, nozzle, cylindrical branch pipe and conical extension piece. Internal space of cylindrical branch pipe includes inlet section in the form of cylinder and measurement section in the form of cone matched to it. Ring chambers with pickups measuring high and low pressure are placed coaxially to inlet part and to cylindrical branch pipe and communicate with their internal spaces through perforation in the form of slit double step grooves. EFFECT: increased accuracy of measurement of medium and large flow rates, expanded dynamic range of measurement. 2 dwg