SU977062A1 - Sieve - Google Patents

Description

The invention relates to the field of the torus industry, in particular to devices for the classification of bulk material.

A sieve is known, which includes screening sites formed by transverse slats with longitudinal elastic masks and Ij rigidly fixed on the latter.

The disadvantage of the sieve is that, despite the wavy, in terms of the surface of the sieving, the efficiency of sieving is reduced when there are layer-shaped and wedge-like inclusions in the material due to the latter hanging between the grates.

The closest technical solution to the proposed technical essence and the achieved result is that the sieve includes screening sites formed by transverse slats with longitudinal elastic grates rigidly fixed on the latter, which are twisted along their axis on the screening site in one direction, and in the adjacent section opposite f 2j.

The disadvantage of the sieve is that, due to the arbitrary angle of torsion of the grate between adjacent rails, the mixing efficiency of the material is reduced and the probability of clogging of the living section of the sieve KLINOVIDNY1.1 and layer-like inclusions is high enough, ultimately resulting in reduced screening efficiency.

The purpose of the invention is to increase the efficiency of screening by more

10 intensive degree of mixing material and cleaning. screening surface.

This goal is achieved by the fact that in the sieve, including the sieving areas,

15 formed by transverse slats with rigidly fixed on the latter by longitudinal elastic grates, which are twisted along their axis on the screening site in one side, and on the adjacent section - in the opposite direction, each of the grid bars is made in the form of a tape, which is twisted within the limits of y tacTKa angle not less than 90 and not

25 more than 180®.

FIG. 1 shows a sieve, side view j in FIG. 2 - the same plan view; in fig. 3 is a section A-A in FIG. 2; in fig. 4 and 5 - mounting options

Claims (2)

30 tapes to the rail. The sieve consists of a screening surface, made up of grates 1, made of rubber tapes and fixed to transverse support rails 2 using uiypynoB 3. Rubber tapes (FIGS. 1-4) are spun 180 degrees in the spans between the support tapes. The direction of the tape twist is adjacent spans opposite. In the case of tape twisting at an angle different from 90 ° or 180, the support rails 2 are provided with recesses 4 in which rubber bands are fixed (Fig. 5). The sieve works as follows. When advancing the rattling material along the sieve, the difficult wedge-shaped grains 3 avisit in the gaps between the grates, advance and fall onto the spiral plane of the neighboring grates, gradually rise and pass the sections above the transverse support rails. The opposite direction of movement of the cargo flow in the spans between the tracks and the support rails set the sides of the twisted tapes, which creates an intensification of the mixing of the material grains between. When peaing iron ore, including a layer-like inclusions, the twist angle chooses more than when sifting out, for example, coke, in which there are practically no layer-like inclusions. The invention of the sieve, including the sieving areas formed by transverse slats with longitudinal elastic grates fixed on the latter, which are twisted along its axis on the sieving section in one direction, 1 and in the adjacent section in the opposite direction, about LL This is due to the fact that, in order to increase screening efficiency by a more intensive degree of material mixing and self-cleaning of the screening surface, each of the COLOOKERS is made in the form of a tape that is twisted within the area of the screening or at an angle not less than 90 ° and not more than 180. Sources of information taken into account during the examination 1. USSR author's certificate №697204, cl. B 07 B 1/46, 1967. 2. USSR author's certificate No. 770566, cl. B 07 B 1/46, 1978 (prototype). .