Metering device for a powdery material
AssigneeAir Industrie
InventorsChristian Carre, Claude Rouault
Life of this patent
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Abstract
At the outlet of the duct for the powdery material is provided a movable diaphragm where orifice is adapted to engage a clearing fixed pin when the flow rate of said material reaches a predetermined low threshold. Said diaphragm is controlled by clearance actuating means comprising a pneumatic jack adapted to be supplied with compressed air through an electro-valve whose control input is connected to the output of a flow detector.
Claims5
Declogging device for a duct in which normally flows a powdery material, said duct being provided at its outlet with a removable diaphragm comprising an orifice determinging a normal flow rate of the material, said declogging device comprising:
- a flow detector for sensing the flow rate of the material and supplying at its output a signal when the rate of flow of said material is under or reaches a predetermined threshold lower than said normal flow rate, consequent upon partial or total obstruction of said orifice;
- a clearing pin;
- and actuating means connected to said output of the flow detector for causing said clearing pin to be engaged in said orifice of the diaphragm and to clear the latter when receiving said signal.
Dependencies are inferred from the claim text.