SU1717263A1 - Control screen - Google Patents

Abstract

The invention relates to devices for the separation of materials by size and m. used in the mountain and other areas of the national households-va. The purpose of the invention is to increase the productivity and efficiency of screening. The screen contains a box 1 with a conical sieve (P) 2, which is located apex down. Box 1 is installed by means of rollers 7 on frame 3 with the possibility of rotation around the axis P 2, which is located at an angle to the vertical. Material is fed to P 2 via loading / CO C. Direction KQflfGQHLta XI oo

Description

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A flexible pipe 5, which is displaced from the axis of rotation P 2 in the direction opposite to the direction of its deviation from the vertical, and is located above the peripheral part of P. 2. Vibrator 4 oscillates P 2 in the direction of deviation of its axis of rotation. The vibration exciter 4 is mounted on the frame 3. The frame 3 is mounted on the shock absorbers 9. The pieces of material under the influence of

vibrations and centrifugal forces are actively mixed and separated. The oversize product goes from P 2 to discharge port 6. For cleaning P 2, the screen is equipped with a cleaning device that is located at the loading pipe 5 and is offset relative to it in the direction opposite to the direction of rotation P2. 2 Il.

The invention relates to a device for the separation of materials by size and can be used in the mining and other sectors of the national economy.

The aim of the invention is to increase the productivity and efficiency of screening.

FIG. 1 shows a conical screen, a transverse section; in fig. 2 is a view A of FIG. one.

The screen contains a box. 1 with a conical sieve 2 located apex downwards, a frame 3, a vibration exciter 4, a loading nozzle 5, a discharge nozzle 6, rollers 7, a drive for rotating the box 1 (not poazan), a cleaning device 8 and shock absorbers 9. Herewith the box 1 carrying on itself the sieve 2, communicates through the rollers 7 with the frame 3. The frame 3 is installed on the supporting shock absorbers 9 and is designed for transmission from the vibration exciter 4 through the rollers 7 and the oscillation box 1 to the sieve 2.

The axis of rotation of the sieve 2 is located at an angle to the vertical. The line of action of the driving force of the vibration exciter 4 is also located at an angle in the direction of deflection of the axis of rotation of the sieve 2. The loading nozzle 5 is offset from the axis of rotation in the direction opposite to the direction of its deflection, and is located above the peripheral part of the sieve 2.

The cleaning device 8 is installed in the area of the sieve 2, free from the rattling material, in front of the loading nozzle 5, i.e. shifted relative to it in the direction opposite to the direction of rotation of the sieve 2.

The device 8 is made in the form of a rubber roller or ruff, the longitudinal axis of which is directed along the generatrix of the conical screening surface. The cleaning device 8 is intended for additional (by direct contact) cleaning of the sieve 2.

The roar works as follows.

Box 1 performs a complex movement: under the action of the vibration exciter 4, mounted on frame 3, it oscillates at an angle a to the vertical, and from a separate

drive through the rollers 7 gets the rotation. The source material from the loading nozzle 5 enters the sieve 2. At the same time, various pieces of material fall into sieve sections 2 that are located at different distances from the center of the box.

Pieces of material perceive different in magnitude centrifugal forces of inertia PI, and the same in magnitude and direction vibration forces FI. The presence of the latter is due to the direction of oscillations at an angle a, which creates the possibility of influencing the material in order to move in the direction of the force FI. The oversize product enters the discharge port 6. The boundaries of the material layer in FIG. 2 are shown in phantom.

The loading scheme of two adjacent pieces of material, shown in enlarged

The scale shown in FIG. 2. Three characteristic positions of adjacent pieces at the beginning, middle, and end of the material path are given. The diagram shows that the resultant efforts RJ vary

in time both in magnitude and in direction. The limiting value of the centrifugal force of inertia is not limited by any conditions and is selected by adjusting the frequency of rotation of the box from

conditions of the best results of the process.

These design features provide effective separation of pieces of material and active mixing.

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Claims (1)

The invention of the conical screen, including a box with a conical sieve, located apex down, mounted on the frame by means of rollers rotatably around the axis of the conical sieve, vibration exciter mounted on the frame, shock absorbers, on which the frame is installed, loading and unloading nozzles, that, in order to improve the performance and efficiency of screening, it is equipped with a cleaning device, the axis of rotation of the conical sieve is angled to the vertical, the loading nozzle to displaced Yayo from the axis of rotation of the conical sieve to the side opposite to the direction of its deviation from the vertical, and placed above the peripheral part of the sieve, and the vibrator is fixed with the possibility of exciting the sieve oscillations at an angle to the vertical in the direction of deflection of its axis of rotation, while pipe in the direction opposite to the direction of rotation of the sieve. BUT % // more L-AJA & ABOUT  & / faiyxrt & 7Ј MJP dpacruse / r tsf