SU1706725A1 - Vibration screen - Google Patents

Description

Spare grille exceeds the area of the opening. The height H of the partition 6 above the distribution grid is made decreasing, and the gap S is increasing from the longitudinal axis OX of the screen to the walls 9 of the duct B e and n, the gap between the end face of the transducer and G and the wall 9 is taken from the ratio

a 2 A,

where Lng is the size of oversized pieces in the outcome of the material (IM).

 to the walls 9, the lateral portions of the distribution grid can be made flat or convex upwards. The grill 5 can be fixed to the box 1 rigidly or by means of elastic ties (not shown in the drawings).

The distribution grid (see Fig. 5) can be made in the form of oriented opposite to the longitudinal axis OX of the gita 4; grate elements 10. the ends of which are fixed console. moreover, the value of console I decreases from I min to B direction toward the discharge end of the sieve. Glkl of the structure provides intensive loosening of the material on the grid and prevents jamming of large pieces and sieve.

Y y -: - the niches of the area F of the lattice and correspondingly; 1; l; ---,., product (PP) in the opening 8 will distribute-: .. the lattice (see. Fig. 7) can fit-Tb is made in the form of a truncated cone 11. The BCG of the cheek with a large base b; f situ h. At the base of the cone attached protective tip 12, made of wear-resistant material.

The distribution lattice 13 (see FIG. 9) can be made in the form of a taper along the axis of the cone, oriented orn O; to the discharge end of the sieve. In the tcm example, with a large value of the lattice distance, the minimum height Kc of the device loading unit is provided and favorable conditions for transporting the MI at the loading point on the sieve, thus, expanding the transport channel between the grid and the duct wall.

The distribution grid 14 (see Fig. 12) can be made as an irregular truncated pyramid facing the sieve with a nayune-tic 15 facing the sieve. Simplicity of design and possibility of replacing individual sections (faces) of the grid with a large area F side poker. the pyramids increase the operational c-yst of the proposed rumble.

The values of the design parameters (a, d, I. I, F. 5. N. H.O. P) the area and shape of the opening 8, as well as the version of the screen, depend on the conditions of screening. for example, the class of divisions (d) of the specific load, the requirements for the products of the section — R & D and the structures adjacent to the photofrom — have darkened and n their apparatuses.

The vibrating screen operates as follows.

Proceed;, the material (IM), containing small fractions of the undersize product (PP), coarse fractions of the nedreshetns. o product (NP4 l oversized (NG) pieces of

5, the feed heat T is fed to the distribution grid 5. due to which the distribution of material over the width of the Bi sieve occurs at section I. Under the action of forces and pressure IM. a falling from a certain height, on the grate 5 (section I), a preliminary separation occurs: part of the undersize product (PP 1) passes through the holes rh of the lattice, and the remainder part of PP 2) moves with the TM

5 along (vector V.) and across (vector Vy) of the grid, rolling down onto the working surface of the sieve. NG pieces of material move from the middle of the lattice (axes OX to the walls 9 of the duct and then move isolated

0 stream. The part of the MI that has not passed through the GRRZZ hole is transported along the sieve by a layer of height h at a speed V. It is classified into PP 2 and NP under the action of a field of vibration 5 cisnnyk forces distributed over the length of the sieve. implemented by the disturbing force of the vibration exciter 3. Thanks to the implementation of the sieve with the opening 8. located under the steeply inclined grating 5,

0 sieve with preliminary separation of the part of the undersize product at the place of loading - PP 1. which, falling through the openings di of the lattice, gets into the opening 8 and is thus isolated from the internal combustion chamber

5 by a layer of material. This leads to a decrease in the thickness (height h) of the material layer as compared to the height of the substrate and, accordingly, an increase in the quality of the separation material. As a result of the prediapositionalization of PP 1 at the loading site (section I), the mass of fine fractions, which are transported together with tossing and colliding with large and NG lumps, is reduced, which reduces the verticality of the material being crushed, for example, coal or thereby enhances .3 (grade) separation products. When pre-selection in the place of loading "Part PP 1 decreases. load of the NGS, mr.- ms

to increase the supply of source material to the screen, which leads to an increase in its performance.

Installing a grid with a gradient across the sieve (at an angle) provides, compared with the prototype, firstly, organized transverse (along the axis of the OS, moving the MI on the grid by the action of the horizontal component of gravity Gy (see Fig. 3) with the velocity vector Vy, which contributes to a more uniform distribution of thickness Nslo on the sieve, and secondly, increases the actual length

screening, as (see Fig. 3). In addition, this sign allows to increase the size di of the openings of the lattice 5 compared to the size d of the openings of the sieve 4, which reduces their clogging, and also causes the IM delivery to coincide with the release of NG pieces from the material flow and the isolated movement of NG pieces along the walls of the box.

Making the partition 5 of height H, decreasing, and the gap S increasing towards the walls 9. provides the direction of the fine fractions from the distribution grid to the central part of the sieve, and the large and NG pieces to the walls 9, which additionally contributes to the increase of the service life of the screen 4 and transverse frame beams one.

The implementation of the distribution grid in the form of grate elements 10 oriented across the screen (see FIG. 5), the length of the arms of which decreases in the direction of transport, additionally provides intensive loosening of the IM on the grid and thereby increases the preliminary release of the part of PP 1 at the loading site. This further reduces the height of the material on the sieve.

When the distribution grid is made in the form of a truncated cone (see Fig. 7), the grid area F (the side surface of the cone) significantly increases, which allows, at the minimum length of section I, to isolate a large number of PM 1 from the MI and additionally reduce the height h of the material layer (or increase the flow rate of MI at the screen).

When performing a lattice in the form of a horizontally oriented cone (see

FIG. 9) cut along the axis and facing vertex Og to the discharge end of the sieve, the minimum height is additionally ensured. But the loading unit of the device and optimal conditions for transporting the material along the sieve along the expanding channels prevent the large pieces between the walls and the grid.

10 Execution of the distribution grid in the form of an irregular truncated pyramid (see Fig. 12) allows, due to the large area of the grid, to increase the allocation of PP 1 at the place of loading of the MI

Claims (4)

1. Vibrating screen, including 0 mounted on elastic supports a box with an exciter, fixed in a box with a slope to the horizon a sieve, above which a distribution grid with lateral parts inclined to the horizon is mounted to the boot end, and a partition, having a V-shaped cross-section with apex, facing upwards and aligned with the longitudinal axis of the screen, whose height is reduced 0 from the longitudinal axis of the screen to the walls of the box, characterized in that, in order to improve the quality of the separation products, the partition is located behind the distribution grid, with the V-shaped part of the partition located on both sides relative to the longitudinal axis of the screen, inclined at an angle sieve angle. 2. The roar according to claim 1, about tl and h and y with and 0 so that the distribution grid is made in the form of grate elements oriented transversely to the longitudinal axis of the grate, the lower ends of which are fixed by cantilever, and the console depth is reduced to 5 the discharge end of the sieve. 3. The crash of claim 1. distinguished by that the distribution grid is made in the form of a truncated cone, with a large base facing the sieve. 0 4. The crash according to claim 1. About tl and ch and y and the fact that the distribution grid is made in the form of an irregular truncated pyramid, facing a large base to the sieve. Fig 1 T ng 83 -J FIG. 5 V Fig.Z 5-5 Fiel FIG. 7 D WH four FIG. 9 gd Fig 8 ML FIG. eleven } Have FIG. 12