Screw device
First Claim
Patent Images
1. A choke for a screw device, the choke comprising:
- a multi-piece choking plug comprising a plurality of choking plug segments, each of the choking plug segments corresponding to one of the choking plug pieces; and
a multi-piece choking ring cooperating with the choking plug, the choking ring comprising a plurality of choking ring segments, each of the choking ring segments corresponding to one of the choking ring pieces, the multi-piece choking ring being selectively positionable at a plurality of different axial positions relative to the multi-piece choking plug and along a barrel of the screw device;
wherein the screw device includes a worm assembly rotatable in a barrel about an axis to move material in a downstream direction in the barrel while compacting the material, the worm assembly including a shaft, the choke further comprising a hub for mounting on the shaft for rotation with the shaft, each of the choking plug segments being releasably mounted on the hub and removable from the hub without removal of the hub from the shaft.
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Accused Products
Abstract
A choke for a screw device include a choking plug comprising a plurality of choking plug segments, and a choking ring cooperating with the choking plug, the choking ring comprising a plurality of choking ring segments. The plug segments may be releasably mounted to a hub is releasably mounted to a shaft of the screw device, and the choking ring segments releasably mounted to the barrel.
25 Citations
20 Claims
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1. A choke for a screw device, the choke comprising:
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a multi-piece choking plug comprising a plurality of choking plug segments, each of the choking plug segments corresponding to one of the choking plug pieces; and a multi-piece choking ring cooperating with the choking plug, the choking ring comprising a plurality of choking ring segments, each of the choking ring segments corresponding to one of the choking ring pieces, the multi-piece choking ring being selectively positionable at a plurality of different axial positions relative to the multi-piece choking plug and along a barrel of the screw device; wherein the screw device includes a worm assembly rotatable in a barrel about an axis to move material in a downstream direction in the barrel while compacting the material, the worm assembly including a shaft, the choke further comprising a hub for mounting on the shaft for rotation with the shaft, each of the choking plug segments being releasably mounted on the hub and removable from the hub without removal of the hub from the shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 20)
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11. A screw press comprising:
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a barrel; a worm assembly rotatable in the barrel about an axis to move material in a downstream direction in the barrel while compacting the material, the worm assembly including a shaft and a plurality of worm elements mounted on the shaft for rotation with the shaft; and a choke comprising a choking plug and a choking ring; the choking plug comprising a plurality of choking plug segments releasably mounted on the shaft; the choking ring cooperating with the choking plug, the choking ring comprising a plurality of choking ring segments releasably mounted on the barrel adjacent to the choking plug, each of the ring segments being selectively positionable at a plurality of different axial positions along the barrel relative to the choking plug. - View Dependent Claims (12, 13, 14, 15)
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16. A choke for a screw device, the choke comprising:
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a multi-piece choking plug comprising a plurality of choking plug segments, each of the choking plug segments corresponding to one of the choking plug pieces; and a multi-piece choking ring cooperating with the choking plug, each of the choking ring segments corresponding to one of the choking ring pieces, the multi-piece choking ring being selectively positionable at a plurality of different axial positions relative to the multi-piece choking plug and along a barrel of the screw device; wherein the screw device includes a worm assembly rotatable in the barrel about an axis to move material in a downstream direction in the barrel while compacting the material, the worm assembly including a shaft, the choke further comprising a hub for mounting on the shaft for rotation with the shaft, each of the choking plug segments being releasably mounted on the hub and removable from the hub without removal of the hub from the shaft; and wherein the barrel has a discharge portion supporting the choking ring so that each of the ring segments is removable in a generally radial outward direction without disassembly of the barrel or removal of the worm assembly, each of the choking plug segments being removable from its location on the hub in a generally radial outward direction without disassembly of the barrel or removal of the worm assembly.
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17. A choke for a screw device, the choke comprising:
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a multi-piece choking plug comprising a plurality of choking plug segments, each of the choking plug segments corresponding to one of the choking plug pieces; and a multi-piece choking ring cooperating with the choking plug, each of the choking ring segments corresponding to one of the choking ring pieces, the multi-piece choking ring being selectively positionable at a plurality of different axial positions relative to the multi-piece choking plug and along a barrel of the screw device; wherein the screw device is a screw press with a screw rotating in the barrel having a discharge portion by which substantially all oil removal from material being processed is completed, the choke being located at the downstream end of the discharge portion, the screw device including a water injector supported on the barrel upstream of the choke for injecting water into the material in the discharge portion of the barrel at a location axially coextensive with the screw.
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18. A choke for a screw device, the choke comprising:
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a multi-piece choking plug comprising a plurality of choking plug segments, each of the choking plug segments corresponding to one of the choking plug pieces; and a choking ring cooperating with the choking plug, the choking ring being selectively positionable at a plurality of different axial positions relative to the multi-piece choking plug and along a barrel of the screw device; wherein the choking plug segments are supported on a hub having an upstream facing first shoulder surface, and each of the choking plug segments has a downstream facing second shoulder surface that is engageable with the first shoulder surface on the hub to transfer thrust on the respective choking plug segment to the hub.
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19. A screw press comprising:
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a barrel; a worm assembly rotatable in the barrel about an axis to move material in a downstream direction in the barrel while compacting the material, the worm assembly including a shaft and a plurality of worm elements mounted on the shaft for rotation with the shaft; and a choke comprising a multi-piece choking plug and a choking ring; the choking plug comprising a plurality of choking plug segments releasably mounted on the shaft, each of the choking plug segments corresponding to one of the choking plug pieces; the choking ring cooperating with the choking plug segments, the choking ring being selectively positionable at a plurality of different axial positions relative to the multi-piece choking plug and along the barrel and being releasably mounted on the barrel adjacent to the choking plug segments; the force of the rotating worm assembly causing a forward thrust on the material being worked and a rearward thrust on the worm assembly; the rearward thrust on the worm assembly being absorbed by a shoulder on the shaft of the worm assembly; and the force of the worm causing the material being worked to exert a forward thrust on the choking plug and thereby on the opposite end of the shaft of the worm assembly.
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Specification