RU202148U1 - ROLLER SCREEN - Google Patents

Abstract

The utility model relates to a technique for separating rock mass into fractions and can be used for screening crushed stone, gravel, ore, coal, as well as for other bulk materials in various areas of the national economy. The roller screen contains a screening surface formed by parallel shafts with disks, made of sections of grouped shafts with arcuate disks, which are mounted on adjacent shafts opposite each other with a gap between the end surfaces of the disks. Sections of grouped shafts consist of at least three shafts, and under each shaft of the section, in addition to the extreme shafts, a stripping shaft is installed, the disks of which are located in the spaces between the disks of the shaft of the section. The disks of the extreme shafts of adjacent sections are staggered relative to each other with overlap. The edges of the section shafts disks are made with thickening along the contour. Arcuate discs of each section are made in the form of a round shape. The disks of the stripping shafts located under the section shafts are made in the form of a multifaceted or toothed shape. 6 ill.

Description

The utility model relates to a technique for separating rock mass into fractions and can be used for screening crushed stone, gravel, ore, coal, as well as for other bulk materials in various areas of the national economy.

Known roller screen, consisting of a number of parallel shafts with mounted on them end-to-end disks with a gap between the end surfaces of the disks of adjacent shafts (SU No. 1488024, CL B07B 1/14, bull. No. 23, 1989). This arrangement of the discs provides the maximum specific screening area on the surface of the roller sieve, creating the most favorable conditions for the intensive passage of material particles between the discs.

However, the gaps between the discs can be clogged with grains of material stuck there, due to the lack of self-cleaning of the sieve holes, which, in turn, leads to a decrease in the productivity of the process and the quality of screening.

The closest technical solution is a roller screen, including a screening surface formed by parallel shafts with discs, made of sections of grouped shafts with arcuate discs. This design of the sieve surface makes it possible to sift the material without clogging the gaps between the discs stuck there, for example, grains of crushed stone, by cleaning the space between the discs of the section shafts. (RU, No. 184688, class В07В 1/16; В07В 1/46, 2018)

The disadvantage of this device is the rather large sieve area occupied by overlapping stripping roller disks and shaft disks of adjacent sections (cleaning zone). As a result, the area of the openings of the screen for intensive screening of material along the length of the screen, where the disks of the section shafts are installed opposite each other, is relatively small, which will be accompanied by a low rate of screening of the material (productivity) per unit area of the screen. Therefore, to achieve effective screening of the material, it is necessary to increase the length of the sieve, which will lead to an increase in metal consumption and energy consumption of the device.

The problem posed is the creation of a device for increasing the screening capacity with simultaneous cleaning of the screening spaces between the disks of the roller screen.

The technical result of the utility model is to increase the productivity and quality of screening.

The problem and the specified technical result are achieved in that the roller screen contains a screening surface formed by parallel shafts with disks, made of sections of grouped shafts with arcuate disks, which are mounted on adjacent shafts opposite each other with a gap between the end surfaces of the disks. According to the useful model, the sections of the grouped shafts consist of at least three shafts, and under each shaft of the section, in addition to the extreme shafts, a stripping shaft is installed, the disks of which are located in the spaces between the disks of the shaft of the section. The disks of the outermost shafts of adjacent sections are staggered relative to each other with overlap. The edges of the section shafts disks are made with thickening along the contour. Arcuate disks of each section are made in the form of a round shape. The disks of the stripping shafts located under the shafts of the sections are made in the form of a multifaceted or toothed shape.

Such an arrangement of shafts with discs, in comparison with the prototype, allows two or more times to increase the specific area of the zone of intensive screening of the material (for example, on one meter of the screen length), where the shaft discs of each section are installed opposite each other with a gap between the end surfaces of the disks of adjacent shafts ... And the location under the section shafts, in addition to the extreme shafts of the stripping shafts, with disks located in the spaces between the section shaft disks, eliminates clogging of the screening space between the section shaft disks. At the same time, the placement of the disks of the extreme shafts of the adjacent sections relative to each other in a staggered manner with overlapping with each other ensures the cleaning of the gaps between the disks of these extreme shafts of the adjacent sections. This prevents all the openings of the roller screen from clogging up with grains of material stuck there.

The execution of the section disks in the form of an arcuate shape (round, elliptical or triangular with arcuate edges) allows maintaining a constant gap between the ends of the disks during synchronous rotation of the section shafts, which excludes jamming of disks of adjacent shafts between themselves and material jamming between their ends.

The execution of the edges of the discs with a thickening along the contour (trellises) contributes to the sticking of solid inclusions (gravel or crushed stone) on the outer side of the discs, which, in turn, allows them to be easily removed from the gap between the shaft disks of the sections by the shaft disks of the adjacent section and the stripping shaft disks.

The execution of the disks of the shafts of the screen in the form of a circular shape creates the most favorable conditions for the passage of particles between the disks of the section, without throwing them over the sieve, and also allows maintaining a constant gap between the ends of the disks of the adjacent shafts of the section, both during the synchronous rotation of the adjacent shafts of the section, and during their different speed of rotation.

The execution of the disks of the stripping rollers located under the middle shafts of each section in the form of a multifaceted or toothed shape will make it possible to more effectively clean the gaps between the disks of the shafts of the sections of the roller screen.

The utility model is illustrated by drawings, where: FIG. 1 shows a roller screen, consisting of three-shaft sections (circular discs), side view; in fig. 2 - roller screen, consisting of sections with three shafts, top view; in fig. 3 - section A-A in Fig. one; in fig. 4 - roller screen, consisting of four-shaft sections (round discs), side view; in fig. 5 roller screen, consisting of four-shaft sections, top view; in fig. 6 - roller screen, consisting of sections with three shafts (triangular discs with arcuate edges).

The device consists of a number of parallel shafts 1 with disks 2 fixed on them, and the roll sieve is made of a set of sections of three shafts 1 (Fig. 1, 2, 6) or more than 3 shafts 1, for example, of 4 (Fig. . 4, 5), with the disks 2 fixed on them with arcuate edges, mounted on the shafts 1 opposite to each other with a gap between the end surfaces of the disks 2. In this case, the disks 2 of the shafts 1 of adjacent sections are staggered relative to each other with overlapping each other in the center of the gap between the disks 2 of each shaft 1. All disks 2 of the shafts 1 of the screen have a thickening 3 (splines) along the contour. Under the middle shaft 1 of each section (Fig. 1, 2, 6) or under the shafts 1, in addition to the extreme shafts 1 of each section (Fig. 4, 5), there are stripping shafts 4 with polyhedral or toothed discs 5 located in the spaces between the discs 2 of the shafts 1 section. Discs 2 of shafts 1 of each section are made in the form of a round shape (Fig. 1-4) or in the form of a triangular shape with arcuate edges (Fig. 6) or in the form of an ellipse (not shown).

The device works as follows. The sorted material is supplied to the shafts 1 synchronously rotating in one direction from a feeder, for example, from a belt conveyor (not shown). Discs of 2 shafts of 1 sections, rotating, constantly throw material particles over the sieving surface, mixing and moving them in the direction of rotation of shafts 1. As the mixture moves through the sieve, fine grains of material are sieved in the intervals between the disks of 2 shafts of 1 sections.

At the same time, the installation of disks 2 opposite each other on the shafts 1 of the sections provides an intensive passage of material particles between the disks 2, due to the longer opening in the sieve compared to the holes formed by the overlapping disks 2 of the shafts 1 of adjacent sections (Figs. 2, 5).

The grouping of the shafts of each section of three or more shafts allows several times to increase the specific area of the "openings" of the sieve holes, which leads to an increase in the intensity of sifting of the fine fraction. At the same time, the arrangement of the disks 2 of the extreme shafts 1 of the adjacent sections with overlapping with each other ensures the cleaning of the gaps between the disks 2 of the extreme shafts 1 of the adjacent sections. At the same time, the placement under the middle shafts 1, enclosed between the extreme shafts 1 of each section, stripping shafts 4 with toothed or polyhedral discs 5, included in the spaces between the discs 2, cleans the sieve holes in the area of intensive screening of the material.

The execution of all discs 2 with a thickening 3 along the contour (Fig. 1, 3, 4, 6) creates conditions for pinching the grains of material only on the outer contour side of the discs 2, which facilitates the removal of a stuck inclusion, for example, gravel or crushed stone, from the gap between the discs 2 overlapping discs 2 outer shafts 1 of adjacent sections and discs 5 stripping rollers 4.

Installation on the shafts of 1 sections of circular disks, can carry out the operation of a roller screen, both with synchronous rotation of the shafts of the sieve, and at their different speeds (in comparison with ellipsoidal disks and triangular with arcuate edges), while maintaining a constant gap between the ends of the disks 2 next standing shafts. This gives additional opportunities for the selection of the most optimal modes of rotation of shafts 1 with discs 2 to obtain the highest efficiency of the fractionation process on a roller screen.

Thus, the implementation of the sieve from a set of sections of three or more shafts with the disks located opposite each other on them, when the disks of the extreme shafts of adjacent sections are arranged overlapping relative to each other in a staggered manner, and under each shaft of the section, in addition to the extreme shafts, there is a stripping shaft, The disks of which are placed between the disks of the section shaft leads to a several times increase in the specific indicator of the area of the zone of intensive screening of the material with the simultaneous cleaning of all screening spaces of the roller screen from grains of material stuck there. Therefore, the combination of the above design features will significantly increase the efficiency and productivity of the process of fractionation of gravel and crushed stone on a roller screen.

The utility model is at the stage of a technical proposal.

Claims (5)

1. A roller screen, including a screening surface formed by parallel shafts with disks, made of sections of grouped shafts with arcuate disks, which are mounted on adjacent shafts opposite each other with a gap between the end surfaces of the disks, characterized in that the sections of the grouped shafts do not consist of of less than three shafts, and under each shaft of the section, in addition to the extreme shafts, there is a stripping shaft, the disks of which are located in the spaces between the disks of the shaft of the section. 2. A roller screen according to claim 1, characterized in that the disks of the outermost shafts of adjacent sections are staggered relative to each other with overlapping. 3. A roller screen according to claim 1, characterized in that the edges of the section shaft disks are made with thickening along the contour. 4. A roller screen according to claim 1, characterized in that the arcuate discs of each section are made in the form of a circular shape. 5. A roller screen according to claim 1, characterized in that the disks of the stripping shafts located under the section shafts are made in the form of a multifaceted or toothed shape.

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