SU1586788A1 - Method of separating grain-straw material - Google Patents

Abstract

This invention relates to the separation of a cereal mixture in agriculture. The goal is to increase the efficiency and production of separation of the granular heap by reducing the straw content in the cleaned grain. To do this, after sifting the material on the first of the sequentially and horizontally installed sifting drums (PB) 1, rotating in one direction, and before being fed to the next (PB) 2, additional sifting of the material is performed. At the same time, the external surfaces of adjacent PBs are cleaned by means of brush cleaners 4.5, the distance between the rows of which is chosen before additional sieving is greater than the maximum grain length, but less than the length of straw particles. Circumferential speed of rotation of the subsequent PB is greater than the previous one. The peripheral speed of rotation of the cleaners 4 and 5 is set to be higher than the previous PB, but less than the subsequent one. The direction of rotation of the cleaners 4, 5 coincides with the direction of rotation of PB 1 and 2. The free grain passes between the rows of bristles of the cleaner 4 and is carried into collection 7, and the grain heap goes to PB 2, from which, after the grain has been extracted, the remaining straw heap is removed by cleaner 5 and enters the collection of 8. 1 Il.

Description

FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular, to grain cleaning and separating devices.

The purpose of the invention is to increase the efficiency and productivity of separation of the granular heap by reducing the straw content in the refined grain.

The drawing shows a diagram of an apparatus for carrying out the method for separating a granular material.

The essence of the separation method is as follows.

The material being separated - a heap-straw heap - is fed to the outer surface of the first successively horizontally installed sifting drums rotating in the same direction, sifting the material and then feeding it to the additional sieving by means of a brush cleaner before the additional sifting is greater than the maximum length grains, but less than the length of straw particles, then the material is fed to the adjacent subsequent bael 00

Os

VI

00 00

raban, sift and remove the oversize fraction from the outer surface of the last drum; simultaneously with additional sieving, clean the outer surfaces of adjacent drums; the direction of rotation of the drums and the cleaner is the same, the circumferential speed of rotation of the subsequent drum is higher than the previous one; circumferential speed of rotation of the previous drum, but less than the circumferential speed of rotation of the subsequent.

A device for carrying out the method (a sieve separator) consists of mesh drums 1 and 2, feeding tray 3, brush cleaners 4 and 5, feeding devices b and collecting passages 7 and gathering 8 fractions of heap.

The device works as follows.

From the feeding device 6, the grain-straw heap is fed to the feed tray 3, and from it to the outer surface of the cylindrical sieve 1. Part of the free grain and small impurities are sifted through the mesh surface of the drum 1 and enter the collection 7. The remaining heap on the outer surface is removed an intermediate cleaning brush 4. In this case, a change in the direction of movement of the pile and the breaking of the spatial lattice formed by straw straws occur, which promotes the movement of grain to the lower layers.

The free grain, which turned out to be in the lower layer of the granular heap, passes between the rows of bristles of the brush-cleaner 4 and is carried into the collection 7. From the brush-cleaner

4, the heap is fed to the outer surface of the next screen drum 2. The process of separating the grain is repeated. From the last screen drum, the remaining heap of straw is removed by brush-cleaner 5 and fed to collection 8 of the tail section.

Claims (1)

Invention Formula A method of separating a granular material, which includes feeding the material onto the outer surface of the first of successively horizontally installed sifting drums rotating in one direction, sieving the material with its subsequent supply to the outer surface of the adjacent drum, whose circumferential rotational speed is greater than that of the previous one, sifting the material, rejecting the oversize fraction from the drum surface, characterized in that, in order to increase the efficiency and productivity of separation, after sifting material on the first drum and in front by feeding to the subsequent drum, additional material is sifted with simultaneous cleaning of the external surfaces of the adjacent drums by means of a brush cleaner; before the additional sifting, the rows of bristles are chosen to be larger than the maximum grain length but less than the length of straw particles, and the circumferential rotational speed is greater than the circumferential rotational speed of the previous drum, but less than the circumferential rotational speed of the subsequent drum, the rotation direction of the brush cleaner coincides with the rotational direction of the screening drums.