SU1685549A1 - Device for screening of friable materials - Google Patents

Description

(Reg. 1

The invention relates to devices for the separation of the size of wet bulk materials and can be used in the coal metallurgical construction industry.

The aim of the invention is to increase the efficiency of screening.

Figure 1 shows a device, a longitudinal incision; in Figure 2, node I in Figure 1; Fig. 3 is a view A of Fig. 1; figure 4 - section bb see, 1; figure 5 is a diagram of the movements of the rods when interacting with a drummer; fig 6 is a fragment of the upper branch with a copy of the ep; Fig, 7 is a section b In figure 6; in FIG. 8, a drummer; Fig. 9 shows an example of the implementation of coal mining, top view; on Fig.10 - section GG nl Fig 9; on Fsh .1 I rgzrez DD in Fig.9.

The sling includes a body I, a scraper conpeier 2 installed in it, a sieve 3 located under the scrapers 4 of the upper stand of the conveyor, and rippers 5 made around the frames with rods G, fixed 1RD sieve 3 on the hinges 7. Trench O for feeding The source material is installed above the sieve 3, and the channels 9 and 10 for separate fractions are placed below the nicky scraper conveyor 2. The orbits of the scraper 4 are equipped with 1 I accessories fixed on their non-working surfaces.

Sieve 3 is made in the form of a set of separate and alternating rigid 12 and elastic 13 prugs, with the latter in - C 1 diminishing over rigid rods. Drummers 1 I are fixed on the scrapers 4 by means of kmrnchrov with the ability to interact with the sieve 2.

Depending on the screening conditions, including the number and shape of flat grains in the source material, the strings of the strings may be located across (figure 2-6) or along (figure 9) the longitudinal axis OX of the sieve 3 In addition, and depending on the specific load and goderzh.chnich, as well as the size of oversized pieces can vary the number and ujai t the location of the rods 12.

The prc transverse rods of the striker 11 (Fig. 4) of adjacent scrapers in the plan, 1 can be mixed relative to the longitudinal axis OX of the p-neck 3 at different distances (b, bi, ba, etc.)

With the longitudinal arrangement, the bars 13 (Fig. 9-11) are made, 1 with the stop 15 located on the side surface on at least one side of the bar, and the gap e between the stop and the bar 12 is taken from the hoop ratio

d - (0.1-025) d, where d is the distance between the rods 12 and 13.

It is possible to perform a striker 11 (Fig. 6) in the form of an elastic plate with thickness S, reinforced with a cord, the plate being bent at an angle a in the direction opposite to the direction of movement of the scraper, and the cord yarns 16 are evenly distributed across the width of the plate. In addition, the thickness S of the plate may be reduced in the direction towards the loose end.

0The device operates as follows.

The raw material in the form of rock mass from chute 8 is fed to the sieve 3 and transported along it by moving

5 scrapers in 4 separate portions. The material is leveled and the small grains are rolled through the sieve slots to the lower branch of the conveyor, which transports them to the chute 10. Large grains

The secondary product is moved by the scrapers 4 to the chute 9. By moving the material in portions of the sieve, the sieve section of the moving scraper is freed from the material. There are only hard grains stuck in the chunk there. Therefore, the location of the striker 11 by the scraper 3 will strengthen its shaking effect on the sieve. When the scraper moves, the drummer 11 interacts with protruding rods

0 13. There is a horizontal deflection of the rod by the value of f (FIG. 3) and vertical movement by the value of L (figure 5), as well as partial deformation of the upper part with an emphasis on the upper edge of the rigid rod.

5 12. After the impactor has passed the bar 13, due to the highly elastic properties of the material and its installation with tension, oscillates in the horizontal plane XOY, vertical and turning

0 - n plane XOZ (figure 5), i.e. makes additional movements relative to the fixed rod 12, which contribute to the advancement of sieves of difficult grains stuck on the slits, When the drummers 11 adjacent scrapers are located (Fig. 3), each subsequent interaction of the rod with the drummer occurs in different places. This contributes to the expansion of the zone of intense action on the rods and enhances the effect of cleaning the sieve.

When the drummer 11 interacts with the stop 15 of a longitudinally oriented rod (Fig. 9), the horizontal cola extends in the latter, such as a traveling wave with a deflection fi and vertical with a deflection Dt

0 (Fig. 10),

Claims (4)

When the drummer 11 is made of a rubber-cord composite, the structure is simplified and the operational reliability of the device is increased by eliminating a pair of friction (hinge 14) and reducing wear at the points of contact of the striker with the rod. Claim 1. A device for screening bulk materials, comprising a housing, a scraper conveyor disposed therein, a sieve installed under the upper conveyor branch, and rippers made in the form of hinged frames with sieves located along the sieve width, characterized in that in order to improve screening efficiency, the device is equipped with percussion bars, five installed on the non-working surface of the conveyor scrapers with the possibility of breezing with the sieve surface, which is made from 01 separate parallel bars. 2. The device according to claim 1. that is, so that the sieve balls are made through one of an elastic material. H. The device according to claim 1. This is due to the fact that the impactors are mounted on adjacent scrapers and are displaced relative to each other along the width of the scrapers. 4. The device according to claim 1, that is, so that the strikers are made in the form of plates of rubber-cord composite. W Wow „ In id / Q2Z W or) /  $, eleven FIG. Z } " -HO s d . h / .Z C fZ / J tf 5-6 Fig 6 Fig 7 16U min Fig 8 / eleven FIG. 9 eleven H / C / 88U ffr 15 13 P