Pulverizing method and apparatus
AssigneeAgency of Industrial Science and Technology
InventorsYoshio Hirayama, Kanichi Ito, Ryoichi Takeuchi, Masao Nomoto, Tomoyuki Shiina
Life of this patent
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Abstract
A method and apparatus for use in pulverization and/or segregation which is suitable for obtaining the desired quality of the pulverized materials. Such pulverization is performed by restricting the discharge rate of the mixture through the discharge opening and thereby controlling the quantity and time the mixture remains within the pulverizer. The pulverizer is provided with a weir at the discharge end of the drum or cylinder for such restricting purpose. Also, beaters disposed within the pulverizer are provided with safety means enabling the beaters to pivot when a relatively stiff constituent is encountered in the mixture.
Claims7
A drum-type pulverizer for pulverizing a mixture of materials, said pulverizer comprising:
- a rotatable cylindrical screen having a plurality of ridge projections on the inside surface thereof and having inlet opening and outlet openings;
- a rotatable shaft centrally and coaxially extending through said cylindrical screen;
- a plurality of anti-entangling plates, each radially mounted on said shaft;
- feed means at said inlet opening for advancing the material to be pulverized from said inlet opening toward said outlet opening;
- a frusto-conical shaped weir attached at the outlet opening of said cylindrical screen restricting the area of said opening;
- a plurality of beaters, each beater being radially mounted on the edge of one of said anti-entangling plates;
- at least one pin member pivotally connecting at least one of said beaters to said anti-entangling plate associated therewith;
- and
- breakable support means further connecting said pivotally connected beater and said anti-entangling plate, said breakable support means being weaker than said pin member, for supporting said beater in a radially projecting direction on said anti-entangling plate and for breaking under pressure and allowing said beater to pivot about said pin member toward said anti-entangling plate.
Dependencies are inferred from the claim text.