|Title of Invention||
|Abstract||The invention concerns a separator, especially a hull separator (2) for separation of hulled grains and husk particles. Such a hull separator is attached after, for example, a rubber roll sheller. The separator shows a separation channel (24) with a higher steepness, to achieve a better shrivelled grain separation from the husk.|
The invention deals with a separator, especially a hull separator for separation of hull from brown rice.
Grains, especiah rice, is hulled before further processing. For this, there are well known shelling machines with rubber rolls. Separators are attached to them, to cleanly separate the hulled brown rice from the husk particles removed from it. Well-known separators show three separation zones and along with the brown rice, several mixed fractions are formed, among other things. In machines called scalperators, the wheat goes through a pre-cleaning drum, which has a stretched coarse wire gauze around it. The wheat passes through the drum and coarse undesirable constituents are sorted out and thrown away. Following which the wheat is aspirated, to remove the light undesirable constituents, where by the aspiration air is drawn in a precipitation chamber by a fan. A recirculating pipe for the air to be reused is already provided. Sand or dust cannot be removed from the product stream.
A similar cleaning machine for wheat is described in RU-PS 2133149. Hereby the wheat is first separated from round and long grain stock and following it light products and dust are removed. The wheat stream then comes in an additional pneumatic separation channel, where broken grains and shrivelled grains are separated and taken away. The air is cleaned and used again.
The invention is now based on the task to patent a separator, especially a hull separator, which separates hulls from grains more efficienth', especially from hulled brown rice. The task is solved with the help of the features in the patent claim. Only two separation products emerge, (brown rice, husk). A mixed fraction, as in the case of conventional technology, is not required.
Through a steeper gradient of the sorting channel, shrivelled grains can be furthermore better removed from the husk.
Accordingly there is provided a Separator, especially hull separator (2) tor separation of hulls from hulled grains, especially rice, showing a feeding device (22) and a separation channel (24) under it, which is arranged in an angle alpha and in it's lowest point a discharge screw (25) for the hulled grains is provided and after which, a chamber (23) with another screw (27) for discharge of husk, follows.
The invention will now be clear with reference to figures 1 and 2 in the accompanying drawings.
Figure 1 is the elevation view of the hull seperator.
Figure 2 is the sectional view of the hull seperator showing arrangements in a roll sheller.
Referring to figures 1 and 2 a rubber roll sheller (1) consists of a casing, with a feeding device on the upper side and a pair of hulling rolls, whose first hulling roll is fixed in one place in the casing and the second hulling roll is moving with respect to the first one through the arrangement on a carrier which is pivotably arranged on the casing, and is pressed against it with an external power, which is provided.The driving power comes to the hulling rolls from a motor drive through a continuous belt which is guided over each one of the driven pulleys arranged on the shafts of the hulling rolls and at least one driving pulley as well as at least one face plate or deflecting plate.
After passing through the roll gap between the hulling rolls, the mixture of hulled brown rice and hulls comes in the hull separator 2 placed under the rubber roll sheller 1. In the feeding area 21, the mixture is distributed evenly over the entire breadth of a separation channel 24 with the help of a feeding device 22 and made to rise by an air current(airow). The air current is set in such a manner so that the brown rice falls downwards against a discharge screw 25 and is
carried awav. The separation channel 24 shows a steep gradient (alpha=45 degrees) and in the progressively narrowing channel, the remaining mixture is accelerated and guided along a curved wall 26 of a chamber 23. The hull is brought out over the screw 27. The air is recirculated. A bvpass valve 28 above arranged under the separation channel 24 prevents the impairment of the suction quality of the fan 29 by the air current. Guiding sheets are so arranged, that the small grain particles can be separated better from the hulls over the surface of the separation channel 24. The fan 29 and the screws 25,27 have single drive for a rotational speed adjustment and a better distribution of driving capacity.
Terms of reference
1. Rubber roll shelters
2. Hull separator
21. Feeding area
22. Feeding device
24. Separation channel
25. Discharge screw
27. Discharge screw
28. Bypass valve
WE CLAIM :
1. Separator, especially hull separator (2) for separation of hulls from hulled grains, especially rice, showing a feeding device (22) and a separation channel (24) under it, which is arranged in an angle alpha and in it's lowest point a discharge screw (25) for the hulled grains is provided and after which, a chamber (23) with another screw (27) for discharge of husk, follows.
2. Separator according to claim 1, is characterized by the fact that the angle alpha approximately amounts to 45 degrees.
3. Separator according to claim 1, is characterized by the fact that the screws (25,27) and a fan (29) show single drives.
4. Separator according to claims 1 to 3 is characterized bv the fact that it is attached directly to a roll sheller.
Dated this 23rd day of November, 2002.
|Indian Patent Application Number||1076/MUM/2002|
|PG Journal Number||31/2008|
|Date of Filing||02-Dec-2002|
|Name of Patentee||BUHLER AG|
|Applicant Address||CH-9240 UZWIL, SWITZERLAND|
|PCT International Classification Number||A 01 D 091/00|
|PCT International Application Number||N/A|
|PCT International Filing date|