SU1433509A1 - Screen sieve - Google Patents

Abstract

The invention relates to the classification of materials by size by sieving and m. used in mining, metallurgical industry, in the production of building materials. The purpose of the invention is to increase the service life of the sieve and simplify installation. On the rectangular frame (P) 1, additional supports 3 in the form of rectangular plates are rigidly fixed. The plates are installed with a smaller edge parallel to the elastic screening surface (PI) 2 under its webs. On the upper edges of the supports 3 fixed fasteners in the form of pins 4, combined with the intersection of the jumpers. The fasteners are welded to P 1 in the form of protrusions 5 with pointed upper edges. In this case, the protrusions 5 are combined with non-through cuts made in the thickened edge of the sieve along its perimeter. When installing a sieve, PP 2 is superimposed on P I, combining jumpers with pins 4. Then PP 2 is stuffed on them. 2 Cp f-ly, 1 ill. S and C

Description

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The invention relates to a technique for classifying materials by size by sieving, and can be used in the mining and metallurgical industry, in the production of building materials. I The purpose of the invention is to increase the service life of the sieve and simplify installation,

The drawing shows the proposed screen of the screen (where the option of additional support fasteners with pins and the periphery of these fastenings by projections on the frame are conventionally combined).

The screen of the screen consists of a frame 1 and a screening surface 2 with edges. The frame is a rectangle welded from corners or structural steel of a different profile. In the frame have | additional intermediate supports 3 e in the form of rectangular plates (Lopma, rigidly installed with a smaller facet on the plane that extends over the sowing surface under its bridges, and the thickness of the plates does not exceed the thickness of the ne). The plates are oriented mainly in the direction of the movement of the material, since in this case they are protected from wear by the undersize fraction. On the upper edges of the plates 3 are fixed additional. Fasteners made in the form of round sharpened: 1s of pins 4, the height of which does not exceed 0.8 thickness of the elastic sifter wafer surface, the pitch between the pins kryten pitch between the cells and does not exceed 6 times the thickness of the screening surface , and the pins are aligned with the intersections of the jumpers.

The second variant concerns the peripheral fastening of the sifting surface 2 to the contour of the frame 1. The fasteners made in the Yide vertical rectangular plate 5 with pointed upper edges are welded to the frame. These plates are combined with non-through cuts, made in the thickened edge of the sieve along its periMetpy. The protrusion plates may be alternately arranged with a version) for bolts (on

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drawing not shown) or with other fasteners.

The installation of the sieve is carried out by imposing an elastic sifting surface on the frame, combining the intersections of the jumpers with the pins and stuffing with a wooden hammer on the pins / on the pins. In the presence of other types of peripheral fasteners (bolts) they are installed last.

The sieve works as follows.

The material to be screened is fed to one end of the sieve and, under the action of vibrations, moves along the sieve to its opposite end. At the same time, particles whose size is smaller than the size of the cells are passed under the sieve and thus the material is divided into two fractions.

Invention Formula

Claims (3)

1. A screen, including a frame, an elastic screening surface with an edge, fixed around the perimeter on the frame with fasteners, in the form of protrusions with pointed ends, and additional supports placed under the bridges of the elastic screening surface fixed to the frame., characterized in that, in order to increase the service life of the sieve and simplify its installation, the screen is equipped with additional fasteners mounted on the additional supports and aligned with the intersection of the jumpers of the elastic screening surface . 2. A sieve according to claim 1, characterized in that the additional supports are made in the form of rectangular plates, the smaller side of which is parallel to the sieve plane, and additional fasteners placed on them are made in the form of pins. 3. A screen according to claim 1, characterized in that in the edge of the screen Non-through cuts are made along its perimeter from the side of the frame, and the slots of the fasteners are made in the form of plates with pointed ends. and combined with blind cuts.