RU1799638C - Equipment for screening of friable material - Google Patents

Abstract

Usage: for sifting bulk materials in the chemical and other industries, Summary of the invention: the device comprises a main sieve 1, an additional sieve 2 of elastic material with baffles 4 located between them, cleaning balls 6 located between them. The sieves are oscillatingly mounted. Under the sieve 2 between the partitions installed rods 3 attached to the support. The sieve 2 is located with a sag between the rods 3 and the partitions 4. 1 ill.

Description

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Invention 0 Hyositis for devices for the separation and sintering of bulk materials and can be used in the chemical, mining industry, and agriculture.

The purpose of the invention is to improve the quality of sieve cleaning.

A structural diagram of the proposed device for screening bulk materials is shown in the drawing.

The device contains a main sieve 1 and an additional sieve 2, mounted under the main one on fixed rods 3. The space between the sieves is divided by partitions 4 into compartments. Partitions 4 are fixed rigidly in the sieve mill, and rods 3 - on the fixed part of the device. An additional sieve 2 is installed with a sag between the rods 3 and the partitions 4, thereby forming cells 5 filled with cleaning balls 6. The rods 3 are connected to the fixed part of the device by means of supports 7 passing through the openings 8 made in the casing of the sieve mill.

The bulk material fed to the main sieve 1, under the influence of vibrations, moves and is divided into fractions. Oscillating together with the sieve mill of the partition 4, they engage in an additional movement the additional sieve 2, which is held motionless at the junction with the rods 3. As a result, the branches of the sieve 2 forming cells 5 are alternately tensioned and weakened. When the sagging branches are tensioned, the balls 6 discharge 0

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are pulled up from the cells 5 and hit the sieve 1. The sieve 1 is shaken and its openings are freed from the particles. However, in contrast to the cells 5 known on the proposed device, located on opposite sides of each partition 4, they move in antiphase. Therefore, each hit of balls b on the sieve 1 occurs in half the oscillation period, i.e. sieve cleaning frequency doubles. In addition, the intensity of the tossing of the balls 6 does not depend on their elasticity, which means that it does not change with temperature. Thus, the cleaning quality of the sieves is increased and maintained regardless of the temperature of the cleaning balls.

Claims (1)

SUMMARY OF THE INVENTION A device for sifting granular material, comprising oscillatingly mounted, one on top of another, a main sieve and an additional sieve, divided by partitions into compartments in which cleaning balls are arranged, characterized in that. that, in order to improve the quality of cleaning the sieves by increasing the frequency of impacts of balls and to exclude the influence of temperature on the intensity of their tossing, the device is equipped with fixed rods installed under an additional sieve between the partitions, while the additional sieve is made of elastic material and is located on the rods with a sag between them and partitions.