SU1599133A1 - Screen sieving surface - Google Patents

Abstract

The invention relates to the enrichment of minerals and is intended for the preparatory screening of coal. The goal is to increase the efficiency of screening by providing self-cleaning of the screening surface of the screen while ensuring the dimensional stability of the screening elongated holes and increasing the reliability of operation and serviceability. Elastic cards (EC) 1 with elongated screening holes 2, transverse 3 and longitudinal 4 bridges (P) are located on a steel pad with support plates and transverse supports located under the transverse П 3. On the non-working side of EC 1, the longitudinally large axis of the holes 2 metal inserts (MV) 5 are placed. MV 5 is made with a length of 1.1-1.3 times the length of the screening hole 2, flush with the lower non-working surface of EC 1 and installed with opposite ends on transverse supports. At the corners on the sub-monitor, protrusions 9 are made, and in the corners of the EK 1, there are slots 10 corresponding to them for fixing the E-1 in the sub-holder. When a rattling material enters the EC 1, the latter experience loads capable of deforming the apertures 2 and changing their dimensions. However, MB 5 interfere with this and particles larger than the limiting separation size do not fall into the undersize product. When material particles get stuck in the hole 2 by vibrating vibrations MV 5, they will hit the transverse supports and shake the jammed particle. 2 hp f-ly, 4 ill.

Description

and and and 3

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for fixing the EC 1 in the device. Dip in the sub-product. When hitting a shaken material on an EC 1 later, loads are applied that can deform the holes 2 and change their dimensions. However, W 5 prevent this, and particles larger than g;

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The invention relates to the enrichment of useful HCKonaeNbix, namely, screening coal, as a design for preparatory coal crushing, and can also be used in the coal, mining and smelting and construction industries,. . ...., - :,

The purpose of the invention. is the increase in screening efficiency by ensuring mobility and self-cleaning by sifting the surface at a constant temporal stability of the size of the screening holes.

FIG. 1 is a schematic representation of the proposed surface projection; FIG. 2 is the same front view; 4ig, 3 - section A-A in FIG. 1; in fig, d - section bb in fig, 1.

The screening surface of the screen has false maps 1s long. These sifting openings 2 are reinforced with steel transverse - - mn jumpers 3, perpendicular to the major axis of the openings 2 and longitudinal-1 with inter-folds 4, each of which is on the non-working side of elastic cards 1 of the longitudinal major axis of the openings 2 inserts 5, made of a length equal to 1 j 1-1, 3 the length of the hole 2, are flush with the lower non-working surface of the elastic cards 1, the maps 1 are located on the pad 6 with support plates 7 and transverse supports 8, which are located under / transverse jumper and 3 elast 1. The metal inserts 5, as well as the holes on the Maps 50 1, are oriented with their longitudinal axes in the direction of the flow of the Rumbled material, and the metals: the insert 5 is located between the holes 2, which stabilizes the times-55

the measures of the latter, both when striking large- sized pieces, and when imposing vibrations on the screen.

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fall into the undersize product. When material particles get stuck in the hole 2 by vibrating oscillations of the MB 5, they hit the transverse supports and, i.1., Crush the stuck particle, 2 hp. . f-ly, And il ...

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The metallic inserts 5 are placed inside the elastic screen 1 so that their opposite ends rest on the transverse supports 8 of the submill b, which is made of steel. Such an arrangement of metallic inserts 5 and transverse supports 8 enhances the rigidity of the screening surface and makes it possible to accept large specific loads on one side and, on the other, to get the effect of self-cleaning of holes 2 due to the vibrating sieve from elastic impact of elastic cards I o Podmitnik 6 (steel o steel) when 1 large-sized lumps of shaken material hit the Cto, or vibration vibrations applied to it.

For attachment in the pad 6 elastic cards I from longitudinal displacement along its corners, fixing elements are made in the form of protrusions 9 located at the corners of the pad 6 on the supporting plastics 7 and equal to them the notches 10 at the corners of the elastic card. Since the upper surface of the elastic cards 1 is made flush with the protrusions 9 of the sub-plate b, to prevent vertical displacement of the sieve 1 relative to the sub-bed 4 (as well as for fastening the screening surface on the screen), the traditional method: wooden bars and wedges.

The principle of operation of the screening surface is as follows.

The starting material is nocrynaieT elastic maps 1, where, under the action of lightness, hydrodynamic or inertial forces, the screening of particles smaller than the limiting particle size is divided into the undersize product. When a rattling material hits the elastic cards 1, the latter are subjected to loads capable of deforming the holes 2 and changing their dimensions in order to go with the material,

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Which is made of elastic sieve 1, rheological properties. However, me- tally, e-inserts 5 prevent deformations, thus stabilizing the dimensions of holes 2,.

Thus, Matsytes do not get into the single-graded product more than the limiting size of the separation, the safer efficiency of the process increases,

In addition, the efficiency of screening on the proposed screening surface is increased due to the ingestion of the oversize product with grains smaller than the boundary separation size, since the living section of the elastic maps 1 remains constant. If hard grains and dead spots are not in hole 2, then, when 1 large-sized pieces or vibration oscillations hit the elastic card, it strikes perpendicular supports 8 with its metal inserts 5 and as a result of elastic impact (steel on steel), inertial forces develop. which wipe the jammed particle from the hole 2.

Claims (1)

1. Screening surface of the screen, including the supporter support ,; On which are elastic cards with elongated sifting holes, transverse recurring holes. FIG. 2 33. V. 6 perpendicular to the major axis of the holes and longitudinal bridges, in the case of which, on the non-working side of elastic cards, longitudinally large axes of the holes, metal inserts are placed; The purpose of the surface is at the same time ensuring the stability of the sizes of the screening holes, one of the supports of the poditnik is located under the cross bars of elastic maps, and the metaplic inserts Execute a length equal to the length of the sieving 1,1 1,3 openings flush with the surface of the elastic .shzhney broken cards installed and opposite ends on supports pedsitnika placed under transverse lane emychkami. 2, the surface according to claim 1, that is, so that, in order to increase the reliability of its operation and ease of maintenance, the fixing elements from the lateral displacement of the elastic card are made in the form of projections on the sub-fence located at its corners and the notches at the corners of the elastic map, in which the protrusion lugs are located, 3, The surface according to P. I, about t l and - often with the fact that the pad is made of steel. /TO Aa