SU1114480A1 - Crushed stone cleaning arrangement - Google Patents

Abstract

1. SCREEN DEVELOPMENT, containing frame number, chain in the form of an infinite canvas, tensioned on tension, drive and single rollers, installed on the shafts eccentric with their eccentricity relative to each other, drive shaft, loading and unloading devices, characterized in that, in order to improve the quality of cleaning of bulk materials by increasing the intensity of their separation, it is equipped with deflecting rollers installed during the movement of the material to the slave and after their commercials.

Description

2. The device according to claim 1, wherein the leading llUiSO and the driven rollers are interconnected by a chain transmission.

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The invention relates to the enrichment of bulk materials by mechanical means and can be used in the separation by size of waste of crushed stone plant and the production of open-pit moisture.

A device is known that includes a frame with a drive, an endless grid with guide sprockets, loading and unloading devices 1,

A disadvantage of this device is the poor quality of cleaning bulk materials due to the use of mainly centrifugal forces arising from the movement of an infinite grid along a curvilinear section.

The closest in technical essence and the achieved result to the proposed is a device comprising a frame, a grid in the form of an endless web, tensioned by tensioning masters and followers, eccentric mounted on their shafts (Trichesky with their eccentricity displaced relative to each other, driven by shaft loading and unloading devices 2j.

A disadvantage of the known device is the low efficiency of screening, especially when processing waste from the crushing and screening plants and the original rock mass of high humidity, which does not allow to obtain finished products of high quality.

The purpose of the invention is to improve the quality of cleaning bulk materials by increasing the intensity of their stratification.

The goal is achieved by the fact that a rubble-cleaning device containing a frame, a grid in the form of an endless web stretched on it. tight, vedun (s and driven rollers mounted on their vamps are eccentric. triple with their eccentricity displaced relative to each other, with; BOja with a drive shaft, loading

and unloading devices, equipped with deflecting rollers, installed along the material movement up to the followers and after the leading rollers.

Moreover, the driving and driven rollers are interconnected by a chain drive.

FIG. Figure 1 shows the kinematic diagram of the endless grid path; in fig. 2 is a kinematic diagram of the device; in fig. 3 - the device, a general view ;, on FIG. 4 view A in FIG. 3; in fig. 5 is a diagram of the change in the grid for four rotations of eccentric rollers.

The rubble cleaning device consists of frame 1, eccentric shafts 2 and 3 with leading 4 and driven 5 rollers, deflecting rollers 6 and 7, mounted on corresponding shafts 8 and 9, infinite mesh 10. Eccentric shafts 2 and leading 4 and driven 5 rollers St. interconnected by chain transmission

11i rotate from the drive shaft

12 using transmission 13.

For the purpose of the necessary tensioning of the mesh 10, tension rollers 14 are installed. The initial material can be loaded from the cutting knife 15 (option of the mobile device) or through the tray 16. The device 17 serves to collect the large (top) product.

The device works as follows.

The raw material from the cutting knife 15 or tray is fed to the inner surface of the moving mesh 10 (loading zone 1) and then carried to the working chamber II. The material in the working chamber is subjected to the action of variable centrifugal forces in the area around the mesh of rollers 6 and 7, which draw material together with the mesh, as well as the directional vibrations of the faces of the polygon.

angles that change their position in space and contribute to shaking the material. This creates a new effect, which is expressed in the twisting of the intensity of the screening, as the shaking force is added in magnitude and direction with the field of centrifugal forces in the area around the mesh of the rollers.

The particles of the upper product (non-screened material) in the zone of the tension rollers 1A change their direction and continue to move along a ballistic trajectory to the receiving device t7.

The bottom product that has passed through the openings of the starting material mesh is removed from the working chamber. The wave motion of the grid with the material in the working chamber is achieved by displacing the rollers 4 and 5 on the respective eccentric shafts 2 and 3 under the protractor, 135 relative to each other. FIG. 5 a, b, c, d shows the diagram of the grid shaking in the working chamber for four turns of eccentric rollers 4

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and 3 at an angle equal to 9 °. The numbers 1, 2, 3, 4 show the instantaneous centers of rotation of the eccentric rollers, respectively, when the latter are turned on. 90 °, 180 °, 270, BWO with respect to the center of rotation. The corresponding points 1, 2, 3, 4 on the roller 4 are shifted by 135 ° with respect to the roller 5.

The installation of deflection rollers allows to improve the cleaning quality by combining centrifugal force with grid oscillation.

 The table shows the results of comparative tests of the proposed rubble cleaning device and the known. The source material was a mixture of sand, rubble and

gravel deposit Malkovo, Pskov region. The grid cell size at tests is tO and l5 mm.

The use of the proposed device will improve the quality of the top (natreshetnog) product by reducing the fine fractions in it.

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Claims (2)

1. A WASHER DEMANDING DEVICE, containing 'a frame, a net in the form of an endless web, is pulled, in addition to the tension, driving and driven rollers mounted on its shafts eccentrically with an offset of their eccentricity relative to each other, drive with a drive shaft, loading and unloading devices, characterized in that, in order to improve the quality of cleaning bulk materials By increasing the intensity of their delamination, it is equipped with deflecting rollers installed along the movement of the material to the driven and FIG. 1 LSNTG ⁰ ns> 2. The device according to π. 1, about t and - and driven rollers are connected between co-occurring that leading the battle chain transmission.