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US 4,900,453 AGranted
Filter centrifuge control
AssigneeKrause-Maffei Aktiengesellschaft
InventorPeter Sedlmayer
Life of this patent
Estimating the term…
Abstract
A filter centrifuge has a feeler arm which contacts the free surface of the centrifuge contents to signify by the angular displacement of the arm, the thickness of the layer of contents in the filter drum. On the contact surface of the filter arm, at least one sensor is provided which is responsive to a characteristic of the material constructed by the arm for signalling the nature of the material.
Claims19
A filter centrifuge, comprising:
- a housing;
- a filter drum rotatable in said housing to centrifuge a suspension in said drum;
- a feeler arm pivotally mounted in said housing and having means defining a contact surface for contact with the contents of said drum and having means for signalling a degree of filling of said drum in terms of radial position of said arm;
- and
- sensor means at said contact surface for detecting at least one physical characteristic of the contents of said drum contacted by said feeler arm for signalling the nature of said contents, said sensor means including a temperature sensor.
2 more elements
A filter centrifuge, comprising:
- a housing
- a filter drum rotatable in said housing to centrifuge a suspension in said drum;
- a feeler arm pivotally mounted in said housing and having means defining a contact surface for contact with the contents of said drum and having means for signalling a degree of filling of said drum in terms of radial position of said arm;
- and
- sensor means at said contact surface for detecting at least one physical characteristic of the contents of said drum contacted by said feeler arm for signalling the nature of said contents, said sensor means including an electrical-conductivity sensor.
2 more elements
A filter centrifuge, comprising:
- a housing
- a filter drum rotatable in said housing to centrifuge a suspension in said drum;
- a feeler arm pivotally mounted in said housing and having means defining a contact surface for contact with the contents of said drum and having means for signalling a degree of filling of said drum in terms of position of said arm;
- and
- sensor means at said contact surface for detecting at least one physical characteristic of the contents of said drum contacted by said feeler arm for signalling the nature of said contents, said arm in the region of said contact surface having a knife-edge shape with a narrow front edge turned in a direction opposite the direction of movement of the drum.
2 more elements
A method of operating a filter centrifuge, comprising the steps of:
- (a) introducing a suspension into a filter drum, rotatable in a centrifuge housing and driving the filter drum about an axis of the drum to centrifuge the contents of the drum;
- (b) monitoring the contents of said drum and the degree of filling thereof by contacting the contents of said drum with a contact surface of an arm swingably mounted on said housing and signalling a radial position of said contact surface;
- and
- (c) detecting the nature of the contents of said filter drum contacted by said arm by sensing at least one physical property of the contents of said drum at said contact surface, the physical properties of the contents of the drum which are sensed including the temperature of the contents of the drum.
1 more element
A method of operating a filter centrifuge, comprising the steps of:
- (a) introducing a suspension into a filter drum, rotatable in a centrifuge housing, and driving the filter drum about an axis of the drum to centrifuge the contents of the drum;
- (b) monitoring the contents of said drum and the degree of filling thereof by contacting the contents of said drum with a contact surface of an arm swingably mounted in said housing and signalling a radial position of said contact surface;
- and
- (c) detecting the nature of the contents of said filter drum contacted by said arm by sensing at least one physical property of the contents of said drum at said contact surface, the physical properties of the contents of the drum which are sensed including the electrical conductivity of the contents of the drum.
1 more element
Dependencies are inferred from the claim text.