Worm centrifuge with centrifugal valve
First Claim
1. A centrifuge for separating solid/liquid mixtures comprising:
- a rotatably seated centrifuge drum having a face wall including a plurality of liquid outlet openings;
a conveyor worm rotatably mounted within said centrifuge drum and being capable of having a deviating speed with respect to said centrifuge drum;
at least one drum emptying opening arranged in said face wall radially outward of said liquid outlet openings;
at least one bore in said face wall extending transversely to said at least one drum emptying opening; and
at least one centrifugal force valve disposed in said at least one bore and having a spring-loaded closing member adapted to close said at least one drum emptying opening at relatively high drum speed and to open said at least one drum emptying opening at relatively low drum speed.
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Accused Products
Abstract
A worm centrifuge for separating solids/liquid mixtures is disclosed for overcoming the problems during start-up and shut-down processes that occur when quantity of a liquid is located or remains in the centrifuge drum, particularly the problem of the emergence of liquid at the solids discharge openings during the shut-down process. The inventive centrifuge includes at least one, preferably a plurality of, drum emptying openings distributed over the circumference of the face wall of the centrifuge drum and being positioned radially outside of the liquid discharge openings. The drum emptying openings are each radially crossed by a bore. The bores each include a centrifugal force valve having a spring-loaded closing member adapted to close the drum emptying opening at high drum speed (operating speed) and to open the drum emptying opening at low drum speed.
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Citations
14 Claims
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1. A centrifuge for separating solid/liquid mixtures comprising:
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a rotatably seated centrifuge drum having a face wall including a plurality of liquid outlet openings; a conveyor worm rotatably mounted within said centrifuge drum and being capable of having a deviating speed with respect to said centrifuge drum; at least one drum emptying opening arranged in said face wall radially outward of said liquid outlet openings; at least one bore in said face wall extending transversely to said at least one drum emptying opening; and at least one centrifugal force valve disposed in said at least one bore and having a spring-loaded closing member adapted to close said at least one drum emptying opening at relatively high drum speed and to open said at least one drum emptying opening at relatively low drum speed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A centrifuge for separating solid/liquid mixtures comprising:
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a centrifuge drum mounted to rotate about a longitudinal axis and having a face wall extending generally perpendicular to said axis and including a plurality of liquid outlet openings in said face wall; a conveyor worm rotatably mounted within said centrifuge drum; at least one drum emptying opening disposed in said face wall of said centrifuge drum; and valve means provided in said face wall of said centrifuge drum for closing said at least one drum emptying opening during high speed operation of said centrifuge drum and for opening said drum emptying opening during low-speed operation of the centrifuge drum. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A centrifuge for separating solid/liquid mixtures comprising:
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a centrifuge drum mounted to rotate about a longitudinal axis and having a face wall extending generally perpendicular to said axis and including at least one liquid outlet opening in said face wall; a conveyor worm rotatably mounted within said centrifuge drum; at least one drum emptying opening disposed in said face wall of said centrifuge drum radially outward of said liquid outlet opening and extending transversely through said face wall; and a centrifugally operated valve in said face wall of said centrifuge drum operable to open said at least one drum emptying opening during relatively low-speed operation of said centrifuge drum and to close said drum emptying opening during relatively high-speed operation of said centrifuge drum;
said centrifugally operated valve comprising a moveable valve member mounted for generally radial movement between an open position enabling fluid flow through said drum emptying opening and a closed position blocking flow through the drum emptying opening in response to the speed of rotation of the centrifuge drum. - View Dependent Claims (14)
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Specification