RU2591710C1 - Screen - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to loose material classification and may be used in construction, mining, metallurgy industry, etc. Screen comprises screening surface, drive, loader and unloader. Screening surface is made in form of spiral shape of tunnel, fixed on platform installed elastically on bed. Screening surface is rigidly fixed on platform with vibrator mounted horizontally under platform, and is spiral from hollow tunnel with multi-start screw perforated surface along perimeter of coiled along spiral axis 0₁-0₁ around central rectilinear axis 0₂-0₂ of helical screening surface provided with screw grooves inside at angle to its spiral axis in form of pockets of wavy shape with centers of curvature arranged alternately inside and outside cross section of hollow tunnel. Screening surface is assembled of sections as identical in shape and size rings coiled of identical rhomb-shaped perforated strips, where trapezoid lateral sides of which are located on lateral sides of diamond band, and upper and lower bases of trapezoids are arranged at acute angle to axis of symmetry of diamond band 0₃-0₃ and are flexure lines located at distances from each other equal to length of pockets of wavy shape along inner surface of spiral shape hollow tunnel. Sections in form of rings are interconnected by lateral sides of trapezium.

EFFECT: technical result is increase of productivity and efficiency of screening.

1 cl, 7 dwg

Description

The invention relates to techniques for the classification of bulk materials and can be used in the construction, mining, metallurgical and other industries.

Known drum screen (RF patent No. 2188720, class B07B 1/22, publ. 02/10/2002 Bull. No. 25.) Containing a screening surface, drive, loading and unloading devices. A disadvantage of the known drum screen is the low technological capabilities and productivity.

Closest to the proposed invention is a screen for classifying building materials (RF patent No. 2471573, class B07B 1/22, publ. 01/10/2013 Bull. No. 1.), containing a screening surface, drive, loading and unloading devices.

A disadvantage of the known screen is the limited technological capabilities due to the low mixing intensity, since during the rotation of the drum there is a sliding of the screening mass on the inner surface of the drum, clogging of the sieve openings and the need for additional work to clean them.

The technical solution is to expand technological capabilities, increase productivity.

The technical solution is achieved by the fact that in the screen containing the screening surface, the drive, loading and unloading devices, the screening surface is made in the form of a spiral tunnel shape mounted on a platform mounted elastically on the bed, while the screening surface is rigidly mounted on a platform with a vibrator, mounted horizontally below the platform, and made spiral from a hollow tunnel with a multi-helical perforated screw surface around the perimeter, rolled along a spiral axis 0 ₁ -0 ₁ , around a central rectilinear axis 0 ₂ -0 _{2 of a} spiral screening surface, provided with helical grooves inside at an angle to its spiral axis in the form of pockets of a wave-like shape with centers of curvature alternately inside and outside the cross section of the hollow tunnel, and assembled from sections in the form of rings of the same shape and size, rolled up from the same perforated diamond-shaped strips, on which trapeziums are placed, the sides of which are located on the sides of the diamond-shaped perforated and the upper and lower bases of the trapezoid are located at an acute angle to the axis of symmetry of the rhomboid perforated strip 0 ₃ -0 ₃ and are fold lines located at distances from each other equal to the length of the pockets of a wavy shape along the inner surface of the hollow spiral tunnel, this section in the form of rings connected to each other by the lateral sides of the trapezoid.

According to the patent technical literature, no technical solution was found that is similar to the claimed one, which allows one to judge the inventive step of the proposed screen design.

The novelty is due to the fact that the screening surface is made spiral with a multi-screw perforated screw surface, which increases productivity and expands technological capabilities.

The novelty is seen that a vibrator assembly base to the screening surface provides trajectory of its oscillations with bulk material in the form of a vertical ellipse that provides an increase in the specific gravity of the total kinetic energy (E _n) and increases productivity.

The novelty is that the spiral screening surface with a multi-screw perforated screw around the perimeter is provided with helical grooves inside and outside at an angle to the spiral axis of symmetry 0 ₁ -0 ₁ hollow tunnel of a spiral shape with a central straight axis 0 ₂ -0 ₂ , which increases productivity dehydration and expanding technological capabilities.

The novelty is that the helical grooves of the spiral screening surface are made in the form of pockets of a wave-like shape with centers of curvature located inside and outside the cross section of the hollow tunnel, which expands technological capabilities and increases productivity.

The novelty is seen in the fact that the spiral screening surface is assembled from sections in the form of rings of the same shape and size, rolled up from the same perforated diamond-shaped strips, on which trapeziums are located on the sides of the diamond-shaped perforated strip, and the upper and lower bases of the trapezoid are at an acute angle to the axis of symmetry of the rhomboid perforated strip 0 ₃ -0 ₃ and are bend lines located at distances from each other equal to the length of the pockets of a curved shape on the inner surface the hollow tunnel of the spiral screening surface, while the sections in the form of rings are connected to each other by the lateral sides of the trapezoid, this increases the screening performance.

The novelty of the proposal also lies in the fact that the entire cross-section along the entire perimeter of the spiral screening surface changes not only in shape, but also in area, which provides alternate compression and expansion of the flows of bulk materials in each section of the spiral screening screen, increases productivity and expands technological capabilities.

The novelty of the invention lies in the fact that the trapezoid of rhomboid perforated strips from which the sections are mounted are not inclined to each other, but also to the axis of symmetry of the spiral screening surface, therefore, the compression rate of particles of bulk materials increases and the screening process is intensified.

The novelty lies in the fact that the screening surface is made of a section, the walls of which are differently inclined not only to each other, but also to the direction of the rotational motion of the flows of materials moving under the influence of vibration in planes perpendicular to the passage section of the screening surface, this complicates the trajectory of their movement and increases screening intensity and expands technological capabilities.

The invention is illustrated by drawings, where in FIG. 1 shows a rumble, a general view; in FIG. 2 is a section Α-A in FIG. one; in FIG. 3 - a visual image of the screening surface with pockets of a wave-like shape; in FIG. 4 - a visual representation of the relative position of the spiral 0 ₁ -0 ₁ , along which a hollow tunnel with a multiple helical surface is rolled around a central straight axis 0 ₂ -0 ₂ ; in FIG. 5 - one of the perforated diamond-shaped strips on which trapeziums are placed, the upper and lower bases of which are located at an acute angle to the axis of symmetry of the strip 0 ₃ -0 ₃ in the form of fold lines; in FIG. 6 - a perforated strip of a rhomboid shape, bent on the fold lines of the upper and lower bases of the trapezoid; in FIG. 7 - one of the rhomboid perforated stripes, rolled into a ring.

The screen (Fig. 1, Fig. 2) contains a screening surface 1 that is rigidly fixed to the platform 2, which is resiliently mounted on the base 4 using four rubber-cord balloons 3. The loading device 5 is rigidly fixed to the platform 2, and also rigidly from below to the platform 2 attached vibrator 6 with a horizontal axis of rotation.

The screen is equipped with an unloading device 7 for the removal of large fractions of materials using slice 8 and unloading devices 9 and 10 for the removal of small fractions of materials equipped with slides 11 and 12, mounted on the platform 2.

The vibrator 6 is mounted horizontally under the platform 2 and therefore provides the movement of the screening materials inside the screening surface 1 under the influence of the vibrator 6 along elliptical trajectories.

The screening surface 1 (Fig. 1, Fig. 2, Fig. 3) is made spiral. In FIG. 4 shows a visual representation of the relative position of the axis of the spiral - the center of the axis of symmetry 0 ₁ -0 _{1 of the} hollow tunnel of the screening surface 1 (in Fig. 4, the screening surface 1 is shown by cross sections 9 of the hollow tunnel with a multiple helical surface) and the central straight axis 0 ₂ -0 ₂ screening surface 1.

Thus, along the perimeter, the screening surface 1 is made in the form of a spiral-shaped tunnel with a multi-screw perforated screw around the perimeter and is provided with screw grooves inside and outside, located at an angle α to the axis of symmetry of the spiral 0 ₁ -0 _{1 of the} center of the axis of symmetry (Fig. 3) spiral tunnel, coiled in a spiral 0 ₁ -0 ₁ around the central axis 0 ₂ -0 ₂ spiral sieving surface 1.

The helical grooves of the spiral screening surface 1 are made in the form of pockets 10, 11, 12, 13, 14, 15 on the inner surface and pockets on the outer surface 16, 17, 18, 19, 20, 21 of the spiral shape tunnel (Fig. 4) in the form pockets of a wavy shape with centers of curvature located inside and outside the cross section of the hollow tunnel, and collected from sections in the form of rings 22 of the same shape and size, connected to each other by the lateral sides 23 and 24.

The result is a hollow tunnel spiral sieving surface 1 (Fig. 1, Fig. 2, Fig. 3) with the axis of the spiral - the center of the axis of symmetry 0 ₁ -0 ₁ spiral sifting surface 1, twisted around a central rectilinear axis 0 ₂ -0 ₂ spiral screening surface 1 in diameter D _cp with the formation of a spiral screening surface 1 with an outer diameter of D _max and an inner diameter of D _min (Fig. 4).

In this case, the hollow spiral screening surface 1 with a multiple helical surface is provided with helical grooves in the form of pockets of a wave-like shape 10, 11, 12, 13, 14, 15 and pockets of a wave-like shape 16, 17, 18, 19, 20, 21 on the outer surface of the spiral screening surface 1 (Fig. 4).

Thus, the perforated hollow tunnel with its own helical symmetry axis 0 ₁ -0 ₁ folded along this spiral -0 0 _{1 1} around the central rectilinear axis 0 ₂ -0 ₂ and form the helical screening surface 1 (FIG. 4).

Section 22 is made in the form of a ring (Fig. 7), mounted from a diamond-shaped perforated strip 25.

Trapeziums 26, 27, 28, 29, 30, 31 are placed on the diamond-shaped perforated strip 25, the sides of which are located on the sides of the diamond-shaped perforated strip 25, and the upper and lower bases of these trapezoids (Fig. 5) are located at an acute angle β to the axis the symmetry of the rhomboid perforated strip 0 ₃ -0 ₃ and are fold lines (Fig. 5, Fig. 6) located at distances from each other equal to the scan length of the perimeter of the curved pockets (Fig. 7), a spiral screening surface 1, made in the form hollow tunnel.

In FIG. 5 shows the trapezoid:

ABVG - the first trapeze 26;

VDEG - the second trapezoid 27;

JZE - third trapezoid 28.

Moreover, AB is the smallest of all the upper bases of the trapezoid located on the rhomboid perforated strip 25 below the bend line of the ZhZ and the above three trapeziums (first 26, second 27, third 28).

In FIG. 5 also shows the trapezoid:

ZhNKZ - the fourth trapezoid 29;

NLMK - the fifth trapezoid 30;

LNPM - sixth trapezoid 31.

Moreover, ΝΠ is the smallest base of all the upper bases of the trapezoid located on the rhomboid perforated strip 25 above the bend line of the ZhZ, which for all trapezoids, in turn, is the largest of all lower bases, from the fourth trapezoid to the sixth trapezoid.

Thus, the JZ fold line is not only the lower base of the JZE trapezoid, but also the longest base of the JZE trapezoid and the longest of all the lower fold lines of the rhomboid perforated strip 25 and ring 22 (Fig. 7).

Moreover, the fold lines AB and ΝΠ are the shortest of all the fold lines of the rhomboid perforated strip 25 and rings 22 and AB = TP.

The ratio of the length of the bend line of the ZhZ and AB (NP) determines the value of the step S _{1 of the} spiral 0 ₁ -0 ₁ , and hence the step of winding the hollow tunnel around the straight axis 0 ₂ -0 _{2 of the} spiral sifting surface 1.

For example, in FIG. 5 fold lines L ₆ <L ₅ <L ₄ <L ₃ and L ₀ <L ₁ <L ₂ <L ₃ .

The rhomboid perforated strip 25 is bent along the straight fold lines, which are the base of all six trapezoids and are parallel to each other (Fig. 5).

Then, the perforated strip 25 is folded along the fold lines in a wave-like fashion (FIG. 6) and then folded into a ring 22 (FIG. 7) with wave-shaped pockets. Sections in the form of identical rings 22 are then connected to each other sequentially by the lateral sides 23 and 24 so that all fold lines are a continuation of the fold lines of the same ring of the previous ring.

Thus, the spiral screening surface 1 (Fig. 1, Fig. 2, Fig. 3) is made around the perimeter in the form of a multiple helical spiral surface around the perimeter of the spiral screening surface 1 with helical grooves inside and outside the spiral screening surface 1 in the form of wavy pockets 10, 11, 12, 13, 14, 15 on the inner surface and helical grooves on the outer surface 16, 17, 18, 19, 20, 21 at an angle α to the spiral axis of the hollow tunnel of the spiral shape of the spiral sieving surface 1.

The roar works as follows.

The perturbing force of the vibrator 6 through the walls of the platform 2 and the screening surface 1 is transmitted to the particles of materials inside the screening surface 1 and entering the screening surface 1 in a continuous stream through the loading device 5. The particles of materials rotate along vertical elliptical trajectories, during which the screening process occurs . In this case, the particle of materials not only intensively interacts with each other, but also under the influence of vibration rotate in a plane perpendicular to the bore of the screening surface 1. Since the length of the screening surface 1 has the cross-sectional dimensions, shape and location, the disturbance of movement is aggravated particles of screening materials, which in this case, interacting with the walls of the screening surface 1, move from loading to unloading. The presence in the screening surface 1 of screw perforated surfaces around the perimeter of the screening surface 1 contributes not only to the complication of the motion paths of particles of the screened materials, but also to the displacement along the passage section of the screening surface 1 towards the discharge side.

When particles of screened materials move along the cross-section of the screening surface 1 due to changes in the cross-section in shape and size, compression and rarefaction zones are formed in each section of the screening surface 1 over its entire volume, which also intensifies the screening process. Particles of large fractions of materials through the discharge window 32 are discharged using the slice 8 into the tank 7.

The technical and economic advantages of the screen arise due to the implementation of a spiral-shaped screening surface with screw perforated surfaces in the form of wavy-shaped pockets, which ensures a reduction in overall length, expansion of technological capabilities, increased productivity and the path (length) of movement of materials to be screened.

Technical and economic advantages also arise due to the installation of a vibrator horizontally below the platform with a screening surface and a change in the shape of the trajectory of the screened materials in the form of a vertical ellipse, which ensures an increase in the specific gravity of the total kinetic energy (E _n ) and increases productivity.

Claims (1)

A screen containing a screening surface, a drive, loading and unloading devices, characterized in that the screening surface is made in the form of a spiral tunnel shape mounted on a platform mounted elastically on the bed, while the screening surface is rigidly mounted on a platform with a vibrator mounted horizontally mounted below the platform and a spiral formed of a hollow tunnel with multistart helical perforated surface around the perimeter of the folded spiral axis 0 ₁ -0 ₁ around the central linear axis 0 ₂ -0 ₂ spiral screening surface provided with helical grooves inside at an angle to its axis in a spiral form pockets waveform with centers of curvature located alternately inside and outside of the hollow cross-section of the tunnel, and is assembled from sections of identical shape and sizes of rings, rolled up from identical perforated diamond-shaped strips, on which trapeziums are placed, the sides of which are located on the sides of the diamond-shaped perforated strip, and the upper and the lower bases of the trapezoid are located at an acute angle to the axis of symmetry of the rhomboid perforated strip 0 ₃ -0 ₃ and are fold lines located at distances from each other equal to the length of the pockets of a wavy shape along the inner surface of the hollow tunnel of a spiral shape, while sections in the form of rings are connected each other with the sides of the trapezoid.

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