Electromagnetic flow meter with weir
AssigneeFischer & Porter Co.
InventorsWilfried Kiene, Peter Nissen
Life of this patent
Estimating the term…
Abstract
A weir is placed across a pipe section and an electromagnetic flow meter with multiple electrodes is located upstream of the weir. The liquid level and velocity of fluid in the pipe section are evaluated by the electromagnetic flow meter to determine flow rate.
Claims9
A device to measure the flow of fluid containing electrical charges, said device comprising:
- a generally horizontal pipe section having an electrically insulated inner surface and through which fluid flows;
- magnet means for generating a magnetic field which extends diametrically of said pipe section;
- electrode means responsive to shifts in charges in said fluid which flows through said pipe section and the level of said fluid which flows through said pipe section for sensing the flowrate of said fluid which flows through said pipe section.
- a weir positioned downstream of said electrode means and extending across said pipe section for stemming the flow of said fluid which flows through said pipe section;
- and evaluation circuit means responsive to said electrode means and calibrated by the characteristics of said weir which affect the flow of said fluid which flows through said pipe section for developing an indication of the flowrate of said fluid which flows through said pipe section.
Device to measure the flow of fluids containing electrical charges with an essentially horizontal pipe section in which the fluid flows and which is at least electrically insulating on its inner side, with a magnet arrangement which generates a magnetic filed essentially diametrically in the pipe section, with an electrode arrangement which responds to a shift of the charges in the fluid which flows perpendicularly through the magnetic field, and with an evaluation circuit controlled by the electrode arrangement which produces an output signal corresponding to the fluid flowrate and which also takes into account the level of the fluid, further including a weir located downstream of the electrode arrangement in the pipe section and extending across the pipe section to stem the flow and wherein the evaluation circuit is calibrated taking into consideration the dimensions of the weir.
Dependencies are inferred from the claim text.