RU1790457C - Equipment for concentration of friable materials - Google Patents

Abstract

The invention relates to devices for the enrichment of bulk materials and can be used in the mining industry. The purpose of the invention is to increase work efficiency. In a device including a drive 11, a drive shaft with eccentric bushings 7 and a screening surface in the form of grates 2 and 3 longitudinal with respect to the material motion, pivotally fixed at one end on the support shaft 12, the opposite ends of the even grates 2 are freely mounted on the eccentric bushings 7 of the drive shaft, and the odd grates 3 are fixed cantilever. The drive shaft is equipped with spacer sleeves 6 and articulated beams 9, the plane of rotation of which is between even grates 2, the length of the odd grates 3 is less than the length of the even grates 2. 3 zp f-ly, 3 ill. ate with

Description

The invention relates to a device for the enrichment of bulk materials and can be used in units of transshipment of cyclic-continuous or continuous production of minerals for the separation of bulk materials by size, to complete the sizing of the product and loading them on the main transport both in the underground and open method development.

A known installation for crushing and sorting stones or similar material into several fractions, including a hopper mounted in series, the bottom of which is a feeder, crusher, screens. The feeder, crusher and screens are equipped with individual drives.

At the screen, the material is divided into conditioned and substandard fractions, the first (under-sieve product) is loaded into the main transport, and the second (over-sieved product) enters the crusher, where it is also loaded into the main transport.

Such installations are cumbersome, metal-intensive, complex and have low working efficiency.

The closest in technical essence and the achieved effect to the invention is a device for the separation of bulk material.

This device includes a drive, a drive shaft with eccentric bushings and a screening surface in the form of an XI O

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longitudinal with respect to the movement of the grate material.

A disadvantage of the device is its low efficiency. The known device cannot efficiently screen bulk materials with a high moisture content and does not provide selective finishing of the oversize product.

The purpose of the invention is to increase the efficiency of enrichment.

The goal is achieved by the fact that the known device, comprising a housing, a drive shaft mounted in the housing with beats fixed to it with a constant pitch, eccentric elements located between them, a screening surface in the form of articulated hinges to the housing at one end from the loading side, the other ends of which installed freely between the beats with the ability to interact with eccentric elements, equipped with additional grates, fixed cantilever with alternation relative to the main ones, etc. than the cantilever ends of the additional grate located opposite free ends beat with a gap relative to the latter, and the eccentric elements are in the form of sleeves mounted on a shaft. In addition, the device is equipped with spacer sleeves located on the shaft between the eccentric bushings, located at the ends of the latter, restrictive disks and rods fixed between the disks of each spacer sleeve at their periphery, while the beater is pivotally mounted on the rods x.

In order to increase the ease of maintenance of the device, the drive shaft is made detachably connected to the bearing assemblies.

The proposed technical solution of the device for the enrichment of bulk materials provides screening of the starting material, including with a high moisture content and the completion of the sieve product, which increases the efficiency of enrichment.

In FIG. 1 shows the proposed device; in FIG. 2 is a view A in FIG. 1; in FIG. 3 is one embodiment of a detachable connection of a shaft with bearing assemblies (assembly I in Fig. 2).

The device comprises a housing 1, in which a screening surface with main 2 and additional 3 grid-irons and a drive shaft 4 with a set of restrictive discs 5, spacer sleeves 6 and eccentric elements 7 in the form of sleeves is placed.

The peripheral restriction discs 5 have a number of holes through which

rods 8 serving as axles for beater 9 are passed. Beater 9 is pivotally suspended on axes. The drive shaft is supported by the bearing assemblies 10 and rotated by the drive 11. Grids 2 and 3 are located in the box

at an angle to the horizontal, with the upper ends of the grid-irons pivotally mounted on the support shaft 12. The opposite ends of the main grid-irons 2 are freely supported by the eccentric bushings 7.

Additional (shortened by an amount equal to the sum of the dimensions of the radius of rotation of the beater and the slit of the screening surface) the grate 3 is made console, for which they are in its upper part

lean on a rigidly fixed transverse beam 13.

In the housing 1 above the drive shaft 4 is fixed a baffle plate 14.

The ends of the drive shaft 4 have protrusions, and the axes of the bearing assemblies 10 are grooves, by means of which, with the help of the axes 15 and cotter pins 16, the drive shaft can be detachably connected to the bearing assemblies.

The device operates as follows:

As the drive shaft rotates, the main grates 2 kinematically coupled thereto begin to vibrate.

Bulk feed material, e.g., coal, loaded onto the upper end of the screening surface, moves along it under the influence of gravity and vibration. In this case, the trifle falls through the slots of the screening surface, and large pieces of coal and splices with sizes larger than the gaps between the grates are completed by the impacts of the rotating beats 9. The pieces are not fragmented when they are hit

beaters 9, but received as a result of this the corresponding speed, they finish up - with a blow to the jack plate 14.

The broken pieces are spilled through the slits of the screening surface and mixed with the previously isolated undergrate product. Stronger pieces of coarse rock and foreign objects (firewood, wood, metal objects, etc.) are ejected by the rotary saws 9 into the sieve product container.

The present invention, in comparison with the prototype, has a number of advantages that can improve the efficiency of the device.

The constructive solution of the screening surface, in which additional grates are fixed cantilever, and the main ones are freely mounted on the eccentric bushings of the drive shaft, equipped with spacer bushes, articulated with the beaters and restrictive discs between them, ensures the screening of granular including with a high moisture content of the material and finishing at the same time, it contributes to the intensive loosening of the material prone to sticking, eliminates the sticking of cracks of the screening rhnosti that

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increases the efficiency of the device.

The technical solution of the drive shaft, made with the possibility of detachable connection with the bearing assemblies, provides for the quick replacement of a damaged or worn shaft shaft, which improves the serviceability of the device.

Practical use of the proposed device for the enrichment of bulk materials will solve the problem of separation of bulk materials by size with the refinement of oversize fractions.

Claims (4)

1. A device for the enrichment of bulk materials, comprising a housing, a drive shaft mounted in the housing with beats fixed to it with a constant pitch, eccentric elements located between them, a screening surface in the form of pivotally attached to the housing at one end of the grate, the other ends of which mounted freely between the beats with the possibility of interaction with eccentric elements, characterized in that, in order to increase the enrichment efficiency, the device is equipped with additional and grate, fixed in cantilever fashion relative to the interleave core, wherein the cantilevered ends additional grate located opposite the free ends beat with a gap relative to the latter. 2. The device according to p. 1, characterized in that the eccentric elements are made in the form of bushings mounted on a shaft. 3. The device according to paragraphs. 1 and 2, characterized in that it is provided with spacer bushes located on the shaft between the eccentric bushings, located at the ends of the last restrictive disks and rods, fixed between the disks of each spacer bushings on their periphery, while the beater is pivotally mounted on the rods x . 4. The device pop. 1, characterized in that, in order to improve serviceability, the drive shaft is arranged for releasably connected to the bearing assemblies.