SU1227262A1 - Sieve for screening loose materials - Google Patents

Description

The invention relates to a technique for the separation of bulk materials, mainly of small classes, and can be used for screening in the processing lines of crushing and processing plants for dispersing rock mass.

The purpose of the invention is to increase the screening process by increasing the total component of the relative displacements of elastic elements including angular displacements.

Figure 1 presents the sieve, a General view; in Fig.2 a section aa in Fig.1; FIG. 3 is a diagram of relative displacements of adjacent sifting elements in a vertical planeJ in FIG. 4, the same in a horizontal plane; figure 5 is a diagram of the relative angular displacements of the screening elements of the sieve ,.

The sieve consists of elastic elements 2 and 3 stretched on supports 1 with vertical protrusions 4 and 5.

The protrusions of each side of the elastic element are installed with a step t, and the protrusions of the opposite sides are shifted by half a step 1/2 t. To fix in supports 1, locks 6 are made at the ends of the elastic elements 2 and 3. When assembling the sieve, each protrusion 4 of the elastic element 2 is located the hollow of another adjacent elastic element 3.

In this case, when assembling the sieve, it is necessary to observe the condition: adjacent elastic elements 2 and 3 must be made of elastic material of different elasticity and installed in supports with different tension.

Due to the fact that the amplitude of the intrinsic oscillations of elastic elements is inversely related to their elasticity (rigidity), the amplitude of natural oscillations of a more elastic elastic element 2s with greater elasticity (rigidity) will be less than that adjacent to an IMM less elastic elastic element 3. The installation of a more elastic elastic element 2 with a greater degree of tension leads to an increase in its elasticity (rigidity), and it means that the amplitude of its natural oscillations decreases even more. screen, while vre, s the amplitude of the adjacent elastic member 3 is increased under the same. to

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Lebani x box rumble. If this sieve assembly condition is observed, the elasticity (rigidity) of the adjacent elastic elements 2 and 3 is different.

5 The supports 1 for mounting and fixing the elastic elements are made in the form of longitudinally arranged plates with grooves permanently mounted on the screen of the screen.

10 Sieve works as follows.

The source material of the appropriate size is fed into a sieve assembled from elastic elements 2 and 3, installed transversely to the flow of the sorted material and, being transported along the screening web, is divided into two products. At the same time, the relative displacements of adjacent, elastic elements 2 and 3,

20 cell-forming sieves, improves the performance of the material sifting through the sieve and self-cleaning of the sieve cells from jammed grains of the material, clay clay and

25 silt particles.

Figures 3 and 4 assume the following.

And ,, And, - the amplitude of oscillations

  - I

elastic element 2, made 3Q of an elastic material more

elasticity and installed in supports with high tension in the horizontal and vertical planes, respectively;

35 A, AJ - amplitude of oscillations. elastic element 3, made of elastic material of less elasticity and installed in supports with lower tension, respectively

40 in horizontal and vertical planes;

B, $ - values of relative displacements of elastic elements 2 and 3, respectively, in the horizontal and

45 vertical planes,

Q., - the value of the relative angular displacements of adjacent elastic elements 2 and 3.

As can be seen from FIGS. 3 and 4, the relative displacements of the elastic elements during the oscillation process provide periodic changes in the size of the cells of the sieve and, at the same time, cause the wobbling of the stuck grains of the material 5 .5 ala, and also break the contact between the stuck grains of the material and the sieve elements 1m cells, thereby eliminating the resistance to the removal of stagnant grains and the promotion of sifting;

The total component of the relative displacements of adjacent elastic elements is composed of relative relative to each other and relative linear displacements in th

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The horizontal and vertical planes. The greater the difference in the relative displacements of the mixture of elastic elements, the greater the difference in the elastic properties of the material from which they are made.

H

2

FIG. 2

(rig V

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Compiled by L. Kotelnikov Editor I. Seglenik Tehred G. Gerber Corrector I. Erdeyi

Order 2240/7 Circulation 565 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Sieve for screening of bulk materials, including elastic elements with protrusions mounted parallel to one another and fixed in supports, having different tension, characterized in that, in order to increase the screening process by increasing the total component of the relative movements of elastic elements, including angular displacements adjacent elastic elements are made of material with different elasticities, and elastic elements made of a more elastic material are installed in supports with a greater degree tension. (rie. 1 yo yo m KZ se ye