Flow measuring device for partially filled conduits

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

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G01F 100

Patent

active

046711198

ABSTRACT:
A flow measuring device for measuring the flow rate of a fluid in a partially filled conduit comprises sequentially disposed inlet transition and converging sections and means for determining the level of the fluid in the converging section. The inlet section has a substantially circular cross-sectional configuration, and the converging section has a substantially rectangular cross-sectional configuration, although it has a gradually reducing width in its longitudinal extent to the downstream end thereof. The transition section has an interior configuration which provides a substantially smooth transition between the circular inlet section and the rectangular converging section to avoid introducing turbulence and irregular flow patterns into a fluid passing through the device. A second embodiment of the device includes removable inserts which further reduce the width of the converging section adjacent the downstream end thereof to adapt the device to operate under reduced flow conditions.

REFERENCES:
patent: 2100219 (1937-11-01), Hennison
patent: 3124000 (1964-03-01), Melas
patent: 3427878 (1969-02-01), Gerlitz, Jr. et al.
patent: 3719081 (1973-03-01), Lynn et al.
patent: 3934472 (1976-01-01), Bradham

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