UA37586C2 - Sieve - Google Patents

Abstract

Invention relates to the separation of loose materials by size of particles and may be used at building, mining and processing and abrasive enterprises. The sieve contains cellular sieving surface, which has two-layer structure, upper layer with cells made of rubber has the shape corresponding to the shape lower layer, which has in its structure the reinforcing threads, which continuously in the rows of cells, except for extreme rows, turn round each cell from both sides. The invention provides for the mode of self-cleaning of cells from immerged particles by equalization of mechanical stresses that prolongs the service life of the sieve.

Description

Description of the invention

The invention refers to the division of loose materials by particle size and can be used at 2 construction, mining and beneficiation, abrasive enterprises.

It is known that the sieve has a rubber shell surface, which on the non-working side has stiffening ribs made of the same rubber (Ponomarev I.V. Droblenie i grohochenie ugley., Nedra, M., 1970, 368p). The main drawback

THESE sieves have FAST WEAR.

The closest to the proposed technical solution is the sieve, which is made of a wear-resistant 70 synthetic material - polyurethane (Zieippaiz OtrHN, Riaiapepaiee 46, 0-45478, Mypeit ap adeg Kyig

Kotririazi, Zuviet Zsgeep RisKv), but the use of synthetic materials in this case entails new disadvantages. Sharp-shaped particles sink into the surface of the sieve cells and clog its openings.

The basis of the invention is the task of improving the sieve, which, due to a different design, ensures, by equalizing the mechanical stresses that arise when the loose flow interacts with the sieve, mode 72 of self-cleaning of the cells from submerged particles. This ensures an increase in the period of use of the sieve.

This problem is solved by the fact that in a known sieve containing a cell sifting surface, according to the invention, the surface is made of two layers, the upper layer of cells is made of rubber in a shape corresponding to the shape of the lower layer, and the latter has in its structure reinforcing threads, which in the rows of cells, with the exception of the extreme ones, they go around each cell on every two sides.

Figure 1 shows a general view of the claimed sieve, and Figure 2 shows a section of this sieve along line A-A. It has a bottom layer 1 of rubber. In the interior of this layer there are 2 reinforcing threads, each of which continuously crosses the plane of the sieve, wrapping around the corresponding cells from two sides. On the shell base, the upper layer C with shells, the shape of which is similar to the lower layer, but the wear resistance is higher than that of the lower layer. p 29 When the sieve is in operation, material of different granulometric composition is poured onto its surface. Go)

Large pieces when falling cause increased mechanical stress at the point of impact. These stresses are perceived by the reinforcing threads and transmitted to the entire surface of the screen. In this way, mechanical stresses are equalized. The entire surface of the sieve bends, the shells of layer C and layer 1 receive a certain degree of freedom in the horizontal plane due to the peculiarities of wrapping the sides of the shell with the corresponding continuous reinforcing threads, and are slightly deformed. If a portion of a mineral was immersed in a cell, it receives some release and under the influence of continuous action of the following layers of particles passes under the sieve releasing the cell.

In this way, the sieve is self-cleaning. Stationary operation of the sieve directly depends on the degree of restoration of the deformed structure. When the wear resistance of the upper layer is significantly greater than the lower one, it perceives significant loads, which then, when acting on the lower layer, are amortized and distributed over the entire surface of the sieve, ensuring equalization of mechanical stresses and a self-cleaning mode. at

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Claims (1)

The formula of the invention is a Sieve containing a mesh sifting surface, which is characterized by the fact that the sifting surface is made of two layers, the upper layer with meshes is made of rubber in a shape corresponding to the shape of the lower layer, which has 60 reinforcing threads in its structure, which continuously in the rows of cells, excluding the extreme rows, surround each cell on every two sides. Official bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated microcircuits", 2005, M 2, 15.02.2005. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine.