SU974969A1 - Grain cleaning machine - Google Patents

Description

The invention relates to the cleaning and sorting of grain and can be used in post-harvest processing units of grain crops.

A grain cleaning machine is known, containing a flat sieve and a receiver of the pass-through fraction 1 located under it.

The disadvantage of such a machine is the low quality of cleaning and low productivity.

A grain-cleaning machine is known, which contains a vibrating drive with a sieve mill with a flat sieve, over which the C2J platform is installed parallel to it.

The known machine provides an increase in the quality of cleaning as a result of the fact that, at a higher thickness of the total layer of the grain mixture, it is possible to create a small thickness of the mixture directly on the sieve, i.e. creates good conditions for sifting.

However, the known machine still does not allow to obtain sufficiently high quality cleaning and performance.

The aim of the invention is to improve the quality of cleaning and machine performance.

This goal is achieved in that the machine is equipped with at least one additional platform installed with a gap in series with the main one.

Moreover, the front edges of the platform are bent down.

The drawing shows a schematic grain-cleaning machine, a longitudinal section.

The machine for cleaning wheat grain, P5Sh, barley, etc. contains a sieve mill with a flat sieve 1, platforms 2 and 3, and a receiver 4 through passage fractionation.

The sieve mill is equipped with a drive mechanism 5 in reciprocating motion and is attached to the frame 6 of the machine by means of suspensions 7. A bunker-feeder 8 is installed above the station20. Platforms 2 and 3 are installed in series above sieve 1 and parallel to eriy with a gap between them. Their front edges 9 and 10 are bent down 25 to prevent the grain mixture from being squeezed between sieve 1 and platforms 2 and 3.

The gap between the platforms 2 and 3 is 100-200 mm. Distance from sieve 1 to front I POMOK 9 and 10

thirty

is 10-20 mm. The grain material coming from the feed hopper 8 to the sieve pan is divided by the front edge 9 of platform 2 along the thickness of the layer into two approximately equal flows. The bottom layer, moving along sieve 1 /, is efficiently processed — the passable particles in a thin layer quickly reach the surface of the sieve and sift through it. The upper layer is further distributed over platform 2. When efs, the passage particles (smaller) are redistributed in it and fall onto the surface of platform 2. After the process of lowering the passageway of particles, the upper layer is fed to the lower end of the platform 2, as a result the particles fall through the bottom layer onto the surface of the sieve 1 and are sieved. In order to provide intensive passage through the lower layer, a second platform 3 is installed, removing the upper layer (free from small particles) of the material and thereby creating a rational separation of the fine component from the layer.

The test results showed that the proposed technical solution ensures the performance of the seed and sorting sieves by at least 20%.

Claims (2)

1. A grain cleaning machine containing a flat-screened sieve mill equipped with a vibro-drive, over which a platform is installed parallel to it, characterized in that, in order to improve the quality of cleaning and productivity of the machine, it is equipped with at least one additional platform installed with a gap in series with main. 2. Machine pop. 1, characterized in that the front edges of the platform are bent down. Sources of information taken into account in the examination  1. USSR author's certificate No. 292653, cl. A 01 F 12/44, 1969. 2. USSR author's certificate W782744, cl. A 01 F 12/44, 1979 (prototype).