DEVICE FOR MEASURING FLOW RATE OF FLUID MEDIUM Russian patent published in 2020 - IPC G01F1/42 

FIELD: measurement.

SUBSTANCE: invention relates to measurement of amount of gases and liquids transported via pipelines. Fluid flow rate measuring device includes in-series located in the housing along the common axis a honeycomb, prechamber, a nozzle with an unloading chamber enveloping it, a low pressure chamber and a diffuser. Prechamber is interconnected with its enclosing annular chamber of high pressure formation. Low-pressure chamber communicates with the annular low-pressure formation enclosing it. Prechamber has a part with a smooth surface and a part with slotted perforation, and the diffuser contains a conically expanding part and a nonlinearly expanding part which is enclosed by an unloading chamber communicating with it. At that, on non-linear part of diffuser there are through holes providing connection of unloading chamber with flow of measured fluid medium. Device housing is preferably made detachable with flange connection, joint of which coincides with cross section separating conical and non-linear parts of diffuser. Device may also contain a sampling section between the low-pressure chamber and the diffuser.

EFFECT: reduction of pressure drop at measurement of fluid medium flow rate and increase of reliability and accuracy of measurement.

7 cl, 4 dwg