SU839610A1 - Sieve for screen apparatus - Google Patents

Description

(54) SINE FOR DINING

t

The invention relates to mineral processing, intended for screening bulk materials and can be used in the coal mining and metallurgical, construction and chemical industries.

A sieve is known containing grate bars secured in cross-link slots l}.

However, the device does not provide sufficient dispersion of the material grains along the height of the flow layer, since the screening surface is formed by grate bars located in one plane,

The purpose of the invention is to increase the efficiency of the screening process.

The goal is achieved by the fact that the ends of adjacent grates are displaced relative to each other in a vertical plane by the height of the grate. Moreover, the grate bars are secured in the grooves of the cross links by means of elastic pads and are made with spikes on the part of the side surface entering the groove.

Figure 1 shows a sieve, a general view in isometry) in figure 2 - section A-A in figure 1.

The sieve consists of grates 1, provided in the places of attachment with angular pointed spikes 2, front and rear cross-links 3 and 4 with grooves 5 and 6, in which the grate 1 is fixed in elastic pads 7.

Angled pointed spikes 2 are only in those places of the grate, which are placed in the grooves 5 and 6 of the cross link 3 and 4. The grooves 5 and 6 in the cross link 3 alternate with each other. The depth of the groove 5 is equal to the height of the grate, and the depth of the groove 6 is equal to no less than two heights of the grate.

five

The proposed screening screen is made as follows.

One of the grates 1 is placed in the grooves 5 on transverse links, h x 3 and 4 flush with the upper edge of the bond,

0 and the adjacent grates are arranged parallel to each other, placing one end of the grate all the way into the groove 6 of the cross link 3, and the opposite end of the grate overlaps the zak5 on the cross link 4, as a result of which the opposite ends of one of the two adjacent grate bars shifted on cross links in opposite directions vertically relative to the ends of the second grate

by an amount not less than the height of the grate, the image of crossing grate. The grooves 5 and b in the cross connection 3, the string with each other, are located at the same distance. from each other, and the distance between the grooves 5 on the cross link 4 is twice the distance between the grate bars in the light plus the width of the upper edge of the grate.

The fixing of the grate 1 in the slots 5 and b of the cross links 3 and 4 is implemented as follows.

At the ends of the grates 1, in the place of their landing in grooves 5 and b of cross-links 3 and 4, elastic gaskets are put on (self-wedging semi-cuffs) 7, which are fixed on the grate with spikes 2. After that, the grate is inserted into grooves 5 and. b - with tension due to the deformation of the corner elements of the elastic semi-sleeves, which ensure their self-sealing. The presence of spikes prevents the grate from shifting in the upper vertical direction and its loss.

The material is loaded in the direction indicated by the arrow in FIG.

When the starting material arrives at the initial part of the sieve due to the fact that the ends of the adjacent grid-bars are displaced in the front cross-link 3 relative to each other vertically to opposite sides, grains of the screened material are maximally distributed in height. At the same time, between the grates, the ends of which in this area are shifted upwards, along with the grains of the undercutting product, fall down to. the stop with the grate ends of which are shifted downwards, the grains of the rattling material, the size of which is more than two times larger than the boundary size of separation.

As the screened material progresses along the screen of the screen to its middle, the amount of material dispersed vertically decreases, and the grains that pass between the grate shifted up and held up on the grate shifted down, but act on the grains of the undersize product and at the same time experience .the increasing pressure of the grains of the above product not passed

through the grate. Thus, part of the energy of the grains of the oversize product is realized for more intensive extraction under the sieve of the grains smaller than the boundary separation size.

After the material reaches the middle of the sieve and passes its transverse axis, around which the adjacent grates cross, the rattling material is mixed due to the displacement of the moving grains in the transverse direction of the flow direction due to movement of the grains smaller or closer to the grain size from the true edges one of the adjacent grates, on the adjacent one, which greatly increases the probability of screening of the undersize product. As you move toward the end of the sieve to the rear cross-link 4, the material spreads vertically; whether it begins to increase again.

Along with the reliability of fixing the grate bars in the cross-section slots using elastic self-sealing semi-shells, the grate bars, due to the latter, experience vibrations from shock loads of the screened material, which contributes to a more intensive release of the undersize product and prevention of clogging of the sieve.

Claims (3)

1. A screening sieve containing grates fixed in cross-link grooves, characterized in that, in order to increase the efficiency of the screening process, the ends of the adjacent grate are offset from each other in the vertical plane by the height of the grate. 2. A sieve according to claim 1, characterized in that the grate bars are secured in cross-link slots by means of elastic pads. 3. A sieve according to Claim 1, whether it is the case that spikes are made on the surface of the grate entering the groove. Sources of information taken into account in the examination 1. USSR author's certificate number 424616, cl. B 07 B 1/46, .1972.