RU123350U1 - VIBRATION MULTI-YEAR SCREEN FOR SORTING FINE GRAIN MATERIALS - Google Patents

Abstract

A multi-deck vibrating screen for sorting fine-grained materials, including a vibration exciter that generates directed rectilinear vibrations, and a movable box mounted on springs on a fixed support frame and containing horizontally mounted frames with sieving screens, characterized in that each frame has stops for installing jacks that allow sieve replacement, and the vibration exciter is made in the form of a single unit, consisting of two inertial vibrators, while the engine is stationary support frame.

Description

The utility model relates to devices for separating fine-grained bulk materials by size and can be used in the mining, metallurgical and construction industries.

A known vibrating screen (USSR Author's Certificate No. 155391, priority date 05/21/1962), intended for classification by size of small loose powders, including a spring-loaded frame, driven by two self-synchronizing unbalanced vibrators, and a system of sieve frames connected to the frame using inclined packets flat springs, and in order to ensure continuous knocking out of particles of material stuck in the sieves, the space between the sieves and the bottoms of the frames in it is divided by rods into a number of cells, in which rubber bodies are freely placed.

The disadvantage of this device is the low frequency of oscillations, unreliability of the design of the springs, leakage of the structure.

As a prototype of the claimed device, a redesigned multi-deck MDS machine from RHEWUM was selected, http://2012.rhewum.com/en/uberarbeitete-mehrdecksiebmaschine-mds-von-rhev/um/, posted on the site in October 2008. The device includes a movable box on which two motor vibrators are installed. In the box in the upper part, sieve frames are fixed, inside which sieves are located. The box is supported through the springs on a fixed frame.

The disadvantages of the device are:

- the complexity of the design of the detachable device for replacing screens, in addition, this detachable device is mounted on a movable box, which increases the oscillating mass and makes the screen less reliable;

- the complexity of changing the amplitude of the oscillations;

- lack of reliability and maintainability of motor vibrators;

- the impossibility of changing the direction of the resulting force of the vibrators.

The objective of the utility model is the creation of a mechanically reliable, technologically efficient and maintainable multi-deck screen for classifying fine-grained dry material.

To solve this problem, the following design of a vibrating multi-deck screen is proposed (Fig. 1).

The inventive device includes a box (1), a vibration exciter (2), and a support frame (3).

The box (1) through the springs (4) is mounted on a stationary support frame (3).

Frames (decks) (5) with screening sieves are horizontally installed in the box. Each frame has an emphasis for installing the jack in order to replace the screens. The number of frames may vary depending on the requirements for the number of sifted fractions. Frames with sieves are fixed with studs (6).

The tightness of the screen is ensured by a cover (9) and a flexible apron (10) connecting the fixed cover with an oscillating frame.

The cover (9) is attached to the fixed support frame (3) using racks (8).

A vibration exciter (2) consisting of two vibrators (11) is attached to the box (1). Rotation of the vibrator shafts is transmitted from engines (12) mounted on a fixed support frame.

The screen works as follows:

The vibration exciter (2) is made in the form of a single unit, consisting of two inertial vibrators (11), creating directional rectilinear vibrations transmitted to the box (1). The material in the box (1) under the influence of vibration is evenly distributed over the surface of the upper sieve and then transported along the sieve, divided into sub-sieve and sieve products. Sublattice material, falling on the lower sieve, also moving along its surface, is divided into sublattice and over-sieve products and so on to the lower sieve. The products, reaching the edge of the sieve, are poured into the funnel (7) and transported through hoses connected to the outlet pipes to collection containers.

To replace the sieves, it is necessary to remove the studs (6) (Fig. 1), install the jacks in such a way (Fig. 2) so that the movable part of the jack (13) is inserted into the emphasis of the frame to be lifted with sieves, and the fixed part of the jack is inserted into the emphasis of the lower frame. The sieves are removed from the formed gap between the frames (5).

The advantages of the claimed device are:

1) Easy to remove and replace screens.

2) The simplicity of changing the amplitude of oscillations due to the ease of access to removable unbalance weights.

3) Increased mechanical reliability of the drive of the vibrators due to the installation of the engine on a fixed frame.

4) The ability to change the angle of inclination of the resulting force of the vibrators due to the implementation of the exciter in the form of a single unit that has the ability to be reinstalled at different angles to the screening surfaces.

Claims (1)

A multi-deck vibrating screen for sorting fine-grained materials, including a vibration exciter creating direct rectilinear vibrations, and a movable box mounted on springs on a fixed support frame and containing horizontally mounted frames with screening sieves, characterized in that each frame has stops for installing jacks that allow sieve replacement, and the exciter is made in the form of a single unit consisting of two inertial vibrators, while the engine is mounted on a fixed support frame.