SU1706726A1 - Sizing screen - Google Patents

Description

The invention relates to the enrichment of minerals, in particular to the technique of coal screening, to the construction of sieves, and can be used in the coal, mining and metallurgical and construction industries.

The purpose of the invention is to improve the quality of material dissipation by creating amplitudes of oscillations of various sizes along the length of the rods.

FIG. 1 shows a sieve, top view; in fig. 2 is a section A-A in FIG. 1; in fig. 3 is a section bb of fig 1; in fig. 4 shows a section B-B in FIG. 2

Sieve screen contains a frame formed by the sidewalls 1 in the form of channels and across the PL 2.

Flexible strips 3 with elastic protrusions 4 are secured closely in the lower part of the box 1 with a ring 5 and a bolt joint 6.

In the elastic protrusions fixed one ends of the transversely arranged rods 7, while their second ends are placed with a gap in the vertical grooves 8 of the vertical partition 9. The grooves 8 are made in the lower part of the partitions 9 to restrict x, n, and the horses. also, elastic dvukhskatnoy protective k., mouse- m 1 10 and protrusions 11 inside it. 1 ppi.iiil 10 with tension is fixed with r (power (: -, protrusions 1 1 me to stop 12 above about :; with g сc: and 9, mounted on rack 13 then ;, l is rigidly connected through the transverse 11 with sidewalls 1. Under the rods 7 there are elastic cords 15, made with stubborn thickenings 16 at the ends, which are fastened with tension in g: azg) x 17 on the crossbars 2. The cross section of the grooves 17 corresponds to the cross section of elastic cords 15, the length of which is somewhat less than the PGK drainage is between the outer planes PG-2.

.. -l g cdl elastic forces of elastic material cords 15 are securely held s slots 17 on the strips 2.

Sieve sieve works as follows.

The material is fed directly onto the screening surface of the screen. During material movement on the working surface of the sieve, stratification of grains by size occurs and small grains fall into the gap between the rods 7. During the period of oscillation of the screen, as well as from collisions of large pieces with rods 7, there is an intense oscillation of the rods in the vertical plane. At the same time, the oscillation amplitude increases in the direction from the protrusion 4 to the loose end of the rod 7, which is displaced mainly vertically and in the grooves 8 on the wall 9 of the rod movement limiter. The loose ends of the rods 7 are hit

when lifting against the elastic surface of the walls 9, they are rejected in the opposite direction. The downward displacement of the rods 7 is limited by the flexible cords 15 located under them. Hitting the cords

15, further, under the action of elastic forces, the rods are shifted upwards. At such displacements of the rods 7 up and down, an intensive stratification of the material occurs.

Under the action of inertial forces at the moment

collisions of the rods 7 with elastic walls 10 and cords 15 clean the holes between the rods and detach the adhered particles from their surfaces. The placement of the ends of the rods 7 in the grooves 8 partitions 9

prevents a significant displacement of the rods 7 about the horizontal, which prevents the ingress of large pieces into the sub-product.

Protective roof 10 eliminates clogging

the gap a between the oppositely located rods 7, and the restriction of their course of movement along the vertical.

Tensioned elastic cords 15 limit the movement of the rods 7 vertically, prevent them from falling out of the grooves 8 and, by the action of elastic forces, help the rods 7 to be lifted upwards.

Claims (2)

1. Screen sieve, including a frame with sidewalls, sifting the surface in the form of transverse rods, installed with the possibility of vertical and horizontal movements, about the same way that. in order to improve the quality of sieving material by creating amplitudes of their oscillations of different size along the rods, the sieve is provided with vertical a partition with vertical slots rigidly fixed along the longitudinal axis of the screening surface, attached to the side frames of the frame with flexible strips with elastic protrusions in which they are fixed one ends of the transverse rods, and longitudinal elastic boreholes placed under the screening surface, installed with a tension that can interact with the rods, while the other ends of the rods are placed with a gap in the vertical grooves of the partitions. 2. A sieve according to claim 1, in connection with the fact that it is equipped with a gable protective cover rigidly attached to the frame above the partition. Ll 7 8