SU1748887A1 - Sizing screen - Google Patents

Abstract

Use of material classification by size. Entity1 screen comprises a frame 3 with a sieve 4, which with the help of elastic connections in the form of a cable 2 installed in the plane of the sieve 4 is attached to the body 1. The apertures 7 in the feeder 6 are made with different width of slit-like openings decreasing to the discharge side. Besides, the screen has a strip 5 of elastic material for sealing the space between the feeder 6 and the sieve 4, located along the perimeter of the sieve 4, except for its discharge end. 2 yl

Description

/ WITH

///////// SS /

S ///////// S /

t

-Ј

00 00 00

Xi

1

The invention relates to equipment for classifying materials by size and can be used in the mining and other industries of the national economy.

The known screen includes a body with a vibration exciter mounted on it, located in the body at an angle to the horizontal screen and parallel to the screen in a feeder in the form of a box with slit-like openings.

The drawback of the screen is that the screen is attached to the screen and high accelerations on the screen are necessary to create high accelerations on the screen surface, which reduces the durability and increases the energy intensity of the classification process.

The purpose of the invention is to reduce energy consumption and reduce dust emission.

The goal is achieved by the fact that in a screen that includes a case, a feeder with generous holes located in the case, an inclined sieve above the feeder and a vibration exciter, the sieve is fixed to the case by means of elastic connections in the form of cables installed in a stressed state and located in the plane of the sieve, the vibration exciter is kinematically rigidly connected to the sieve, and the holes in the feeder are made with different width of slit-like holes, decreasing to the discharge side, while the screen is provided with an elastic band Nogo material for sealing the space between a feeder and a sieve, and the sieve situated perimeter than its discharge end.

FIG. 1 shows the screen structure; fig 2 is the same cross section.

The screen comprises a housing 1, to which frame 3 with a sieve 4 is fixed by means of horizontal elastic ties in the form of cables 2 installed in the stressed state, along the sieve 4, apart from its discharge end, a strip 5 is tightly fixed to the frame 3 elastic material, such as rubber. The upper part of the strip 5 is fixed to the housing of the feeder 6, which is mounted on the housing 1 of the screen. The back wall and the top cover of the feeder 6 are made removable. The slit-like holes 7 of the feeder 6 have a different slot width, decreasing in the direction of material unloading, and the smallest slot width is larger than the maximum size of the screened material.

The vibration exciter 8 is mounted as follows.

The unbalanced shaft is rigidly fixed to frame 3 with sieve 4, and the electric motor (not

shown) with petal clutch mounted on the housing 1 rumble.

The roar works as follows. When screening material, the rear wall or top cover of the feeder is removed.

6 and the material enters the feeder box 6. Through the slit-like openings 7 of the feeder 6, the material is poured onto the surface of the sieve 4 and subjected to screening. The rubber strip 6 forms a flow of material that prevents the material from falling out of the sieve 4. The sieve 4 is located under the feeder box 6 at such a minimum distance that the material can freely undergo the screening process. The width of the slot-like holes 7 decreases in the direction of material unloading, which makes it possible to more evenly distribute the material over the surface of the sieve 4. Under the influence of the vibration exciter 8, the frame 3 oscillates horizontal elastic connections in the form of cables 2, which are located in the plane of the sieve 4. In that case when the oscillation frequency of the vibration exciter 8 coincides with the natural frequency of oscillation of the cables 2, they occur

resonance oscillations, which ensures the creation of high accelerations on the surface of the sieve 4 and a reduction in the power of the vibration exciter 8.

The proposed screen provides

the possibility of classifying ore pulps and bulk materials, while classifying bulk materials reduces the energy intensity by at least 10–15 times and reduces dust emission.

Claims (1)

Invention Formula A screen comprising a housing located in the housing of a feeder with slot-like openings, an inclined sieve under the feeder, and a vibration exciter, characterized in that, in order to reduce energy costs and reduce dust emissions, the sieve is fixed to the housing by means of elastic connections in the form of cables installed in the strained state and located in the plane of the sieve, the vibration exciter is kinematically rigidly connected with the sieve, and the holes in the feeder are made with different width of slit-like holes, decreasing to the discharge side, while the screen is provided with a strip of elastic material for sealing the space between the feeder and the sieve located along the perimeter of the sieve, except for its discharge end. Ј% &&& 1 ////// /// //////// Llag eight