SU366019A1 - Oscillation sito - Google Patents

Description

The invention relates to the technique of sorting grain mixtures.

A vibrating screen for cleaning and sorting, for example, cereal mixtures, which has the shape of a rectangle with rippers in the form of protrusions on its surface, is known.

The purpose of the invention is to intensify the process of cleaning and sorting grain mixtures.

For this purpose, the rippers are arranged across the screen sieve perpendicularly to the movement of the grain mixture. And, moreover, the protrusions are arranged with a gradual increase in the distance between them from the receiving part of the sieve to the return end. In this case, the ratio of the distance between the protrusions to the amplitude of oscillations is 1: 5-f-6 in the receiving part and 1: 10-n12 in the tail part of the sieve.

FIG. Figure 1 shows a sieve with baking powder in the form of metal rods; in fig. 2 - the same, with baking powder in the form of oval corrugations; in fig. 3 - the same, with angular shaped corrugations.

Rippers, made in the form of protrusions 2, are located on the working surface of the oscillating sieve (the height of which in the receiving part of the sieve is 0.5-0.75 of the grain length and gradually decreases towards the return end. With a greater height of rippers, the transition of grain through them is difficult and

it accumulates between them; at a lower level, the impurities do not occupy a position sufficient for free passage through the sieve holes.

The rippers are made in the form of metal rods with a diameter of 3.5-5.0 mm at a distance of 50-100 mm one from another along the BSGy sieve surface and in the form of a corrugated oval or angular shape and are arranged perpendicular to the movement of the grain mixture. The ratio of the distance between the protrusions to the amplitude of oscillation of the sieve is 1: 5-f-6 in the receiving part and 1: in the tail part of the sieve. Grain particles moving

on sieve, when meeting with rippers and descending from it, they occupy an upright position, due to which they freely pass through round holes. Some particles are thrown back up the sieve and re-passes through the riders, and the last ones encounter subsequent rippers on their way. Thus, most particles of the grain mixture repeatedly occupy a perpendicular position with respect to the surface.

the sieve, as a result of which the probability of sieving is greatly increased. When the particles are thrown back and pass them through the rippers, the grain layer is intensively loosened and evenly distributed over the entire surface of the sieve.

Subject invention

Claims (2)

1. An oscillating sieve for cleaning and sorting, nairimer grain mixtures, having the shape of a rectangle with rippers in the form of protrusions on the surface, characterized in that, in order to intensify the process, the protrusions are arranged across the screen sieve perpendicular to the movement of the grain mixture. 2. A sieve according to claim 1, characterized in that the protrusions are arranged with a gradual increase in the distance shallowed by them from the receiving part of the sieve to the return end, while the ratio of the distance between the protrusions to the amplitude of oscillation is 1: 5n-6 in the receiving part and 1: 10-f- 2 in the gathering part of the sieve. / 2 2 FIG.