Power operated rice winnower cum cleaner
It is a power operated machine to clean threshed
paddy crop. The machine is made of mild steel and consists of a blower, an
electric motor (1 hp), hopper, vibratory feeding tray, discharge chute with two
screens (top scalping and bottom grading screen) and supporting frame with
trolley wheels. The blower is of centrifugal type with long axis and straight
blades. The hopper is
truncated trapezoidal in shape opening on to the vibrating tray. An adjustable
gate at the bottom opening of the hopper controls the feed rate of impure
grain. The vibrating tray is hinged with the main frame at slight inclination.
Thick wire strips are welded like teeth of a comb at the lower end of the tray. One top scalping
screen having slotted holes (2.8x19 mm) and one bottom grading screen having
round holes (1.8 mm) are provided in this discharge chute for cleaning
operation. A damper is provided along the chute to obstruct the airflow to
prevent good grains blowing away with chaffs. The whole unit is mounted on
trolley wheels along with a handle to make it movable.
Advantages:
Ø It can
be used by different categories of farmers for producing clean grain from the
threshed crop at farm level.
Ø Properly cleaned rice grains add value to the product; help it for longer and safer storage and smooth milling operation.
Specification
Type |
Movable |
Dimensions LxWxH, cm |
1120 X 720 X 1320 |
Total weight, kg |
100 |
Motor, hp |
1 |
Blower type |
Centrifugal |
Air velocity, m/s |
8-10 |
Eccentric drive, rpm |
350 |
Capacity clean grain, kg/h |
500 |
Labour requirement |
One (For feeding and removal of grain) |
Cleaning efficiency, % |
98 |
Unit cost |
Rs 16,000/- |
Useful life of the machine |
10 years |
Cost of operation (machine) |
Rs 6/- per quintal |
Cost of operation (manual) |
Rs 16/- per quintal |
Pay back period |
Less than a year or 110 tons of processed paddy |