SU1166839A1 - Hydraulic screen - Google Patents

Abstract

.HYDROGROBOT, including a body, conical screening surfaces facing large bases. One to another, mounted above the upper screening surface of the bunker with a discharge opening, covering the bunker from its outer side water supply collector in the form of an annular groove with overflow window, material flow rate quenchers in the form of flexible elements placed above the screening surfaces, some of which are mounted on the bunker along the perimeter of the unloading opening, and a device for supplying water to the bottom This screening surface is characterized in that, in order to expand the area of controlling the material speed over the surface of the sieves while simultaneously increasing the probability of separation of grains of different diameters relative to each other, the flexible elements fixed on the bunker are made to contact the upper screening surface along its forming and placed over the bottom surface of the flexible elements attached to a larger base of the upper sieve surface and made of different lengths, and flexible elements of smaller length are made with the possibility of contact with the upper part of the lower sifting surface, and flexible elements of a greater length - with the possibility of contact with the lower sifting surface along its forming from the upper to the lower part of the sifting surface, while the device supplying water to the lower sifting surface made in the form of a guide cone, which is fixed on the collector, and the overflow window of the annular gutter is formed by its upper part. O5 00 oo

Description

The invention relates to the mining industry, in particular, to hydro screens, intended for preparatory and fine screening of bulk materials. The purpose of the invention is to expand the area of controlling the speed of the material but the surface of the sieves while simultaneously increasing the probability of separation of grains of different diameters relative to each other. FIG. 1 shows a hydro screen, a general view, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 1. The hydraulic screen consists of a bunker 1, equipped with a collector 2, connected at the bottom with a tangentially located pipe 3, and a guide cone 4, a tangentially located feeding pipe 5 connected to an inclined bottom 6 pipe 7 for supplying water to the hydro preparation, speed reducers, made in the form of flexible elements 8-10, distribution cone 11, screening surfaces 12 and 13, each of which is made in the form of a multifaceted pyramid, pallets 14 and 15, discharge pipe 16 for the oversize product 16, times ruzochnyh pipes 17 and 18 for undersize racks 19. The flexible elements 8 are suspended on the perimeter of the discharge port 20 of the hopper 1 and relate to the screening surface 12 along its entire length. Along the perimeter of the larger base of the screening surface 12, flexible elements 9 are suspended, touching the screening surface 13 only at one point (at the beginning of the sieve), and flexible elements 10, touching the screening surface of the sieve 13 along its entire length. The flexible elements 10 are located at the attachment point with pin B selected from the relation B 1 B D where A is the radius of the larger base of the upper screening surface 12; f is the radius of the smaller base of the screening surface 13; B is the width of the flexible element 10. Such a step between the flexible elements 10 at the places of their suspension makes it possible to eliminate the adhesion of the flexible elements to each other at the end portions of the sifting surface 13, since the flexible elements 8-10 control the material flow rate under different separation conditions , changes in specific loads and water consumption, boundary separation size and particle size distribution of the source material. The collector 2 is made in the form of an open annular gutter 21, the inner wall of which is the lateral surface of the bunker 1. Connecting the lower part of the outer wall of the collector 2 to the tangential-disposed supply nozzle 3 prevents the sedimentation of solid particles carried by the collector . Along the lateral surface of the non-perforated, truncated guide cone 4, water flows evenly through the overflow window 22 in the upper part of the groove 21. In FIG. 2 and 3 shows the location of the flexible elements (dampers) 9 and 10. The hydro-sounding works as follows. The source material, previously moistened in the supply nozzle 5 with water from the nozzle 7, enters the inclined bottom 6 where, under the influence of centrifugal force, the grains of the screened material are mixed and they come into contact with water. As the flow progresses along the inclined bottom 6, the material rolls into the hopper 1. From the hopper 1, the wetted material enters the distribution cone 11, spreads on it and in an even layer is directed to the screening surface 12 of the upper cone. Under the influence of flexible elements 10, the flow rate of the material on the upper sieve surface 12 is controlled. In addition, flexible elements 10 squeeze the material against the surface of the sieve, thereby eliminating the separation of the sieve grains from the sieve and thereby increasing the duration of the contact of the sieves with the sieve surface 12. Thus, the probability of failure of the grains in the undersize space increases. When material moves along the screening surface 12, the material is divided into two products. The nodal product from the sifting surface 12 enters the lower sifting surface 13, where fine nesing of the product is carried out due to additional separation of grains with a size smaller than the boundary separation size, as well as desliming it and dewatering. The oversize product is desliming due to the supply of water from the collector 2, which passes through the window 22 through the window 22 to the cone-shaped guide 4, spreads evenly along it and falls in the form of a water curtain onto the initial portion of the screening surface 13. Flexible elements 9 and 10 and the initial portion of the screening surface 12 form an annular bath in which water accumulates, is fed to the classification from the annular collector 2, and part of the water that comes with the nesting product of the screening surface 12. Pr This occurs after washing

fine grains adhering to the surface of larger grains, and a significant part of the non-conforming material is removed into the undersize space at the initial portions of the screening surface 13.

The control of the speed of movement of the oversize product over the entire surface of the sieve 13 is carried out by flexible elements 10, which simultaneously intensify the process of dehydration of the oversize

product, creating an artificial barrier to the flow of water.

The oversize product from the lower conical sieve, its surface 13 is removed through the discharge pipe 16. The undersize product from the upper conical sifting surface. 12 is accumulated in the pallet 14, and then flows through the discharge port 18 to the bottom 15.

The undersize product is removed from the pallet 15 via the discharge port 17.

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Claims (1)

HYDROGRAPHIC HOUSING, comprising a housing, conical sieving surfaces facing one another with large bases, a hopper with an unloading hole mounted above the upper sifting surface, covering the hopper on its outside with a water supply manifold in the form of an annular groove with an overflow window, dampers of material flow rate in the form of placed above the screening surfaces of flexible elements, some of which are mounted on the hopper along the perimeter of the discharge opening, and the adaptation of the water supply to the lower pros a waving surface, characterized in that, in order to expand the area of controlling the speed of the material along the surface of the sieves while increasing the probability of separation of grains of different diameters relative to each other, flexible elements mounted on the hopper are made to come into contact with the upper screening surface along its generatrix, and placed above the lower surface of the flexible elements are attached to the larger base of the upper screening surface and are made of various lengths, and the flexible element shorter length arranged to our conscious _about the upper portion of contact with the bottom surface ivayuschey prose- 59, and the flexible elements of greater length - with the possibility of contact with the bottom surface of the sieve along a generatrix from the top to the bottom of the sieving surface, wherein the water supplying device onto the lower the screening surface is made in the form of a guide cone, which is mounted on the collector, and the overflow window of the annular groove is formed by its upper part. 6889911 ^{, w} nS