SU1553202A1 - Screen - Google Patents

Abstract

The invention relates to equipment for classifying various materials by size, intended primarily for the operation of a screen under a blockage. The purpose of the invention is to reduce the energy intensity of the classification process and the metal intensity of the screen due to a more rational distribution of the load on the screening areas (PU) of the screen. The frame 1 of the screen is mounted on hinged supports (SHO) 2 located between the elastic supports 3. On the frame 1 a sieve is fixed in the form of PU 4 and 5 adjoining each other, located at different angles to the horizon. The screen includes a vibration exciter 6 and a device 7 for loading material. The centers of the supports 2 are horizontally displaced from the interface of PU 4 and 5 sieves. The projection of a part of the screening surface onto a horizontal plane, located from the center of the supports 3 in the loading direction, is less than the projection on the same plane of the remaining part of the screening surface. During batch loading with material, the elastic supports 3 are removed, and the frame 1 on the supports 2 is rotated at a certain angle. In the interval between the next material feed, frame 1 with the sieve returns to its original position. During the operation of the screen, the exciter removes the frame 1 with the sieve out of balance with the minimum expenditure of energy. When a material is transferred from one inclined PU to another, the possibility of material stagnation on the sieve is excluded. 1 il.

Description

The invention relates to equipment for classifying various materials by size, primarily for operating the screen under a blockage, and can be used in the mining, chemical, construction and other industries.

The purpose of the invention is to reduce the energy intensity of the classification process and the metal intensity of the screen due to a more rational distribution of the load on the screening sections of the screen.

The drawing shows the design of the screen, side view.

The screen contains a frame 1 mounted on hinged supports 2 located between elastic supports 3 On a frame 1 a sieve is fixed in the form of sifting portions 4 and 5 intersecting at different angles to the horizon

The screen includes vibration exciter b, devices for loading material 7 and for unloading the unresolved product 8. The centers of the hinged supports 2 are horizontally displaced from the interface of the screening sections 4 and 5. The part of the screening surface is projected on a horizontal plane located from the center of the hinged supports towards the loading side projections onto the same plane of the remaining part of the screening surface.

The hinge supports 2 are made, for example, in the form of rubber-metal hinges and are installed so that, taking into account the distribution of the material over the area of the screening surface and the maximum load when working under rolls, part of frame 1 with a sieve on the load side is balanced by part of the frame 1 with a sieve on the discharge side

The angle of inclination of the screening section 4 is greater than the angle of repose and is 25-35 °, and the angle of inclination of section 5 is equal to the angle of repose and for various materials is 8-15 °

The roar works as follows

The material to be classified from the material loading device 7 enters the screening section 5. During batch loading of the screen by a force pulse from the falling material, the elastic supports 3 are compressed and the frame 1 at the hinge 2 turns around the center of gravity by a certain angle. after

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the material supply, frame 1, with a sieve, is returned to its original position by the elastic properties of the rubber metal hinges 2 and the elastic supports 3. Thus, the oscillation of the working surface of the screen is carried out without an exciter. Material classification is carried out under the force of gravity and vibration of the screening surface. When the screen is operating under a blockage, vibration exciter 6 serves to hang the frame with the sieve out of balance. The shoulder on the discharge side, where the vibration exciter 6 is located, with respect to the center of the pivot bearings 2 is larger than the shoulder on the load side, therefore, the material classification process is carried out with minimal energy consumption. Uniform distribution of the material over the screening surface of the working body is achieved due to the fact that at the loading section the material speed is higher. Since the interface line of the screening sections 4 and 5 is horizontally displaced to one side or the other with respect to the center of the hinge supports 2, when the material moves from one inclined section to another material, it is vibrated from the side of the screening surface 5, which excludes the possibility stagnation of the material and a drop in the amplitude of the working body oscillations.

Claims (1)

Invention Formula A screen comprising a frame mounted on elastic supports, a sieve mounted on the frame in the form of interconnecting screening plots located at different angles to the horizon, an exciter and a device for loading the material, in order to reduce the energy intensity of the classification process and the metal intensity of the screen due to a more rational distribution of the load on the screening areas of the screen, it is equipped with hinge supports placed between the elastic supports displaced horizontally from their centers the interfacing lines of the screening sections of the sieve, while the projection of the part of the screening surface onto the horizontal plane located from the center of the hinged supports towards the loading side is less than the projection on the same plane of the remaining part of the screening surface.