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US 5,473,947 AGranted
Fluidized powder flowrate measurement method and device
AssigneeSames S. A.
InventorThierry Buquet
Life of this patent
Estimating the term…
Abstract
The flowrate of powder in an air-powder mixture circuit comprising a mixture drive area defined by a powder drive device comprising air injector means adapted to inject air in the direction in which the mixture is to be driven is measured by measuring the pressure difference across the drive area and the injected air flowrate and computing the powder flowrate as a function of these two variables.
Claims8
In an air-powder mixture conveying installation comprising
- i) a suction tube connected to a fluidized powder reservoir,
- ii) air-powder mixture drive means connected to said suction tube, said air-powder mixture drive means including throat means having an inlet and an outlet and an air injector means comprising an air nozzle, said nozzle being directed axially relative to said throat means and facing said inlet thereof and said nozzle being positioned relative to said suction tube and said throat means for effecting mixing of air from said nozzle and powder from said reservoir in said throat means to create an air-powder mixture, and
- iii) a controllable compressed air supply connected to feed said air nozzle,
- a powder flowrate measuring arrangement comprising:
- pressure difference measuring means disposed for measuring a pressure difference between said inlet and said outlet of said throat means of said drive means
- air flowrate measuring means for measuring flowrate of air ejected from said air nozzle of said drive means, and
- computing means, connected to said pressure difference measuring means and said air flowrate measuring means, for computing the flowrate of powder as a function of the measured difference and air flowrate.
4 more elements
Dependencies are inferred from the claim text.