MACHINE FOR FRACTIONATION AND PURIFICATION FROM IMPURITIES OF GRAIN MATERIAL Russian patent published in 2014 - IPC B07B4/02 

FIELD: agriculture.

SUBSTANCE: invention relates to grain-cleaning machines and is intended for use in agricultural production, agroindustrial complex, in flour and elevating and mixed feed industry. The machine for fractionation and purification from impurities of grain material comprises a pneumo-separating system comprising a fan, a channel of pre-sieve aspiration with the device of input in it of grain material and a mechanism to control the speed of air, the channels of past-sieve aspiration, sedimentary chambers with the devices of discharge of wastes from them, a louver air cleaner, and the upper tier of the sieves on the upper sieve boot, a middle and lower tiers of the sieves on the lower sieve boot, at that in the first channel of past-sieve aspiration through the device of input of grain the grain fraction is fed - descent from the middle tier of the sieves, in the second channel of past-sieve aspiration through the input device of grain the grain fraction is fed - the descent from the lower tier of the sieves. The vertical part of the channel of past-sieve aspiration is divided by two solid vertical walls parallel to the side walls of the channel forming the three sections of the channel. The middle section is the first channel of past-sieve aspiration and is equipped with a mechanism of independent control of speed of air and the grain input device in the channel. The side sections are the second channel of past-sieve aspiration and provided with mechanism of independent control of speed of air and the grain input device in the channel. On the chute boards of the middle tier of the sieves of the lower sieve boot and the lower tier of the sieves of the lower sieve boot the plates are mounted for directing the grain fractions to the corresponding grain input devices and through them into the channels of the past-sieve aspiration and for the uniform distribution of input grain by the channel width.

EFFECT: increased efficiency of purification from light impurities of grain fraction fed to the first channel of past-sieve aspiration.

4 dwg