Automatic unloading outlet assembly
AssigneeACF Industries, Incorporated
InventorRichard H. Dugge
Life of this patent
Estimating the term…
Abstract
The difference in the pressure drop in a pneumatic discharge conduit (5) between at least one discharge outlet (3) into the conduit and a point 9 downstream of the discharge outlet caused by lading in the discharge conduit is used to control opening and closing of the lading outlet valve 13 to automatically control pneumatic unloading of lading from a container. In one application, the container is a railway hopper car having a plurality of pneumatic discharge outlets 52, 52' and 52" which discharge into a pneumatic discharge conduit.
Claims5
An automatic unloading system for pneumatic discharge of particulate material comprising:
- pressure sensing means provided to at least periodically determine the pressure drop between at least one pneumatic discharge outlet and a point in a pneumatic discharge conduit downstream from the pneumatic outlet, said pressure sensing means sensing corresponding changes in pressure drop in the discharge conduit resulting from more or less particulate material being discharged through the discharge conduit, said pressure sensing means being connected to control means for controlling the opening and closing of one or more pneumatic discharge outlets in fluid communication with the discharge conduit, wherein the pressure sensing means comprises a bleed air conduit, open to the atmosphere, connected into the discharge conduit downstream of the discharge outlet said discharge conduit creating a suction in said bleed air conduit, and a pitot tube located in said bleed air conduit to measure the pressure drop.
An automatic unloading system for pneumatic discharge of particulate material comprising:
- pressure sensing means provided to at least periodically determine the pressure drop between at least one pneumatic discharge outlet and a point in a pneumatic discharge conduit downstream of the pneumatic outlet;
- said pressure sensing means sensing corresponding changes in pressure drop in the discharge conduit resulting from more or less particulate material being discharged through the discharge conduit;
- said pressure sensing means being connected to control means for controlling the opening and closing of one or a plurality of pneumatic discharge outlets in fluid communication with the discharge conduit;
- said pressure sensing means comprising separate conduit means open to the atmosphere in fluid communication with the discharge conduit downstream of the discharge outlet, a suction created in said discharge conduit being applied to said separate conduit means whereby the velocity of air flowing through said separate conduit means is unconstricted by lading flow.
Dependencies are inferred from the claim text.