Apparatus for discharging the contents of a discontinuously operating centrifuge

Claim 2

In a discontinuously operating centrifuge, having a drum provided in an upper axial end with an opening, an arrangement for discharging the contents of the drum comprising, in combination, a suction conduit mounted for insertion into and removal from the drum through said opening, and for pivotal displacement within the drum between an operative position and an inoperative position, said suction conduit having a nozzle portion provided with an inlet opening arranged to be located closely adjacent to an inner circumferential surface of the circumferential wall of said drum and to face opposite the direction of rotation of the drum, the plane of said inlet opening defining, when said conduit is so located, with a tangent to the circumferential wall of the drum a first acute angle, and with the drum radius a second acute angle which is greater than said first acute angle.

Claim 3

In a centrifuge as defined in claim 1, wherein said a suction conduit has a portion provided with a doctor blade arranged to engage material adhering to said inner circumferential surface of said circumferential wall of the drum.

Claim 4

In a centrifuge as defined in claim 2, wherein said doctor blade is provided with a channel extending longitudinally thereof and adapted to be connected with a source of compressed gas.

Claim 5

In a centrifuge as defined in claim 1, wherein said suction conduit with a sickle-shaped passage extending longitudinally of said doctor blade to said inlet opening and forming at the same a sickle-shaped outlet gap, said passage being adapted to be connected with a source of compressed gas.

Claim 6

In a discontinuously operating cenrifuge having a drum provided in an upper axial end with an opening and a circumferential wall, an arrangement for discharging the contents of the drum, comprising, in combination, a suction conduit mounted for insertion into and removal from the drum through said opening, having a portion provided with a doctor blade arranged to engage material adhering to the inner circumferential surface of said circumferential wall of said drum, said doctor blade being provided with a channel extending longitudinally thereof and adapted to be connected with a source of compressed gas, said channel comprising two outlet slots one of which discharges compressed gas transversely of the elongation of the doctor blade; said suction conduit being mounted for pivotal displacement within said drum, and having a nozzle portion provided with an inlet opening arranged to be located closely adjacent to an inner circumferential surface of the circumferential wall of said drum and to face opposite the direction of rotation of the drum, the plane of said inlet opening defining, when said conduit is so located, with a tangent to the circumferential wall of the drum a first acute angle and with the drum radius a second acute angle which is greater than said first acute angle.

Claim 7

In a discontinuously operating cenrifuge having a drum provided in an upper axial end with an opening and a circumferential wall, an arrangement for discharging the contents of the drum, comprising, in combination, a suction conduit mounted for insertion into and removal from the drum through said opening, having a portion provided with a doctor blade arranged to engage material adhering to the inner circumferential surface of said circumferential wall of said drum, said doctor blade being provided with a channel extending longitudinally thereof and adapted to be connected with a source of compressed gas, said channel comprising two outlet slots one of which discharges compressed gas transversely of the elongation of the doctor blade; said suction conduit being mounted for pivotal displacement within said drum, and having a nozzle portion provided with an inlet opening arranged to be located closely adjacent to an inner circumferential surface of the circumferential wall of said drum and to face opposite the direction of rotation of the drum, the plane of said inlet opening defining, when said conduit is so located, with a tangent to the circumferential wall of the drum a first acute angle and with the drum radius a second acute angle which is greater than said first acute angle.

Claim 8

In a discontinuously operating centrifuge having the drum provided in an upper axial end with an opening and a circumferential wall, an arrangement for discharging the contents of the drum comprising, in combination, a suction conduit mounted for insertion into and removal from the drum through said opening, and for pivotal displacement within the drum, said suction conduit having a nozzle portion provided with an inlet opening arranged to be located closely adjacent to an inner circumferential surface of the circumferential wall of said drum and to face opposite the direction of rotation of the drum, said suction conduit being further provided inwardly spaced from said inlet opening with a chamber connected with a source of compressed air, and with outlet nozzle openings communicating with said chamber and arranged to direct compressed air in direction substantially towards the axis of rotation of said drum.

Claim 9

In a discontinuously operating centrifuge having the drum provided in an upper axial end with an opening and a circumferential wall, an arrangement for discharging the contents of the drum comprising, in combination, a suction conduit mounted for insertion into and removal from the drum through said opening, and for pivotal displacement within the drum, said suction conduit having a nozzle portion provided with an inlet opening arranged to be located closely adjacent to an inner circumferential surface of the circumferential wall of said drum and to face opposite the direction of rotation of the drum, said suction conduit being further provided inwardly spaced from said inlet opening with a chamber connected with a source of compressed air, and with outlet nozzle openings communicating with said chamber and arranged to direct compressed air in direction substantially towards the axis of rotation of said drum.

Claim 10

In a discontinuously operating centrifuge having a drum provided in an upper axial end with an opening, an arrangement for discharging the contents of the drum comprising, in combination, a suction conduit mounted for insertion into and removal from the drum through said opening, and for pivotal displacement within the drum, having a portion provided with a doctor blade arranged to engage material adhering to the inner circumferential surface of the circumferential wall of the drum; said conduit comprising a sickle-shaped channel extending longitudinally of said doctor blade, a hollow member mounted on said suction conduit and communicating with said sickle-shaped channel, said hollow member having a sickle-shaped discharge gap connected to a source of compressed gas, said discharge gap being so-oriented as to discharge compressed gas over an outer surface of said suction conduit.

Claim 11

In a discontinuously operating centrifuge having a drum provided in an upper axial end with an opening, an arrangement for discharging the contents of the drum comprising, in combination, a suction conduit mounted for insertion into and removal from the drum through said opening, and for pivotal displacement within the drum, having a portion provided with a doctor blade arranged to engage material adhering to the inner circumferential surface of the circumferential wall of the drum; said conduit comprising a sickle-shaped channel extending longitudinally of said doctor blade, a hollow member mounted on said suction conduit and communicating with said sickle-shaped channel, said hollow member having a sickle-shaped discharge gap connected to a source of compressed gas, said discharge gap being so-oriented as to discharge compressed gas over an outer surface of said suction conduit.