RU2565315C1 - Vibration screen - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: vibration screen contains the screening surface, the drive, loading and unloading devices. The screening surface is installed elastically on a bed, it is fitted with the vibrator and it is implemented as hollow, square form, with the multipass screw punched surface along the internal perimeter and many-sided pockets in the form of various geometrical figures with four and more lateral faces and is formed by four hollow punched sections which are rigidly connected alternately to each other in the form of the hollow circular punched sector with four hollow rectilinear punched sections. Four punched sections are implemented in the form of the hollow circular punched sector, made of the punched strip, convolved into a ring with many-sided surface and with formation of quadrangles, different by sizes, with two parallel sides, located in parallel each other with formation of the punched subsections, connected with each other by the free sides mentioned quadrangles in the form of the hollow circular punched sector, executed with multipass screw punched surface, fitted with screw flutes in the circular punched sector at an angle to its axis in the form of polygonal pockets with various geometrical shapes with four and more lateral faces. The distance between straight lines of bend is equal to the length of each polygon element. Four hollow rectilinear punched sections are made from, at least, one punched strip bent along the straight lines arranged at an angle to edges of the punched strip with formation of parallelograms located on the punched strip alternately to the opposite sides. The punched strip is convolved into cylindrical turns joined to each other along longitudinal edges with formation along external surface of unidirectional broken screw lines, and on internal punched surface - of broken screw polygonal pockets, in the form of various geometrical figures with four and more lateral faces which by perimeter can differ not only by shape, but also by sizes. The distances between fold lines are mutually equal and equal to the sum of lengths of perimeters of geometric shapes of internal punched pocket surfaces.

EFFECT: screening efficiency improvement.

14 dwg

Description

The invention relates to devices for screening rocks, building materials in preparation for transportation, to perform crushing and screening operations, as well as for the classification of building materials.

Known drum screen (US patent No. 2804975, CL 209-287, publ. 1957), including a rotating cylindrical drum and a mechanism for communicating vibrational movements of the drum during rotation.

The disadvantages of the known drum screen are low technological capabilities, self-cleaning of the sieve openings is not effective enough, and therefore this operation is carried out with a stream of water, as well as large dimensions in length.

Closest to the proposed invention is a drum screen (AS USSR No. 613830, class B07B 1/22, 1976) containing a screening surface, a drive, loading and unloading devices.

A disadvantage of the known screen is the limited technological capabilities due to low productivity due to the low mixing intensity, since during rotation of the drum there is a sliding of the screening mass along the inner surface of the drum, clogging of the sieve holes and the need for additional cleaning work, as well as large dimensions of the screen along the length .

The technical solution to the problem is the expansion of technological capabilities, the reduction of dimensions along the length.

The technical solution is achieved by the fact that in a vibrating screen containing a screening surface, a drive, loading and unloading devices, the screening surface is resiliently mounted on a bed, equipped with a vibrator and made hollow, in the form of a square, with a multi-screw perforated surface along the inner perimeter and pockets of a many-sided shape in the form of various geometric figures with four or more lateral sides and is mounted from four hollows rigidly connected alternately to each other perforated sections made in the form of a hollow circular perforated sector with four hollow rectilinear perforated sections, and four perforated sections made in the form of a hollow circular perforated sector made of a perforated strip, rolled into a ring with a multifaceted surface and the formation of quadrangles of different sizes with two parallel sides parallel to each other with the formation of perforated subsections, while perforating These subsections are connected to each other by the free sides of the mentioned quadrangles in the form of a hollow circular perforated sector, made with a multi-helical perforated surface, provided with helical grooves inside the circular perforated sector at an angle to its axis in the form of polygonal pockets of various geometric shapes with four or more sides , and the distance between straight fold lines is equal to the length of each element of the polygon, and four hollow straight lines The perforated sections are made of at least one perforated strip bent in straight lines placed at an angle to the edges of the perforated strip, with the formation of parallelograms located on the strip alternately in opposite directions, while the perforated strip is folded into cylindrical coils connected to each other with the other along the longitudinal edges with the formation on the outer surface of unidirectional broken helical lines, and on the inner perforated surface - broken helical pockets of many angular in the form of various geometric figures with four or more lateral sides, which along the perimeter can be different not only in shape but also in size, while the distances between the fold lines are equal to each other and equal to the sum of the lengths of the perimeters of the geometric figures of pockets of internal perforated surfaces .

According to the patent literature not found a technical solution similar to the claimed, which allows to judge about the inventive step of the proposed vibrating screen.

The novelty is due to the fact that the screening surface is elastically mounted on the bed, equipped with a vibrator and made hollow, in the form of a square, with a multi-helical perforated screw surface along the inner perimeter, which ensures that the particles of the screened material have complex spatial motion, violates the stationary motion, reduces the size of the screen length, expands technological capabilities.

The novelty is due to the fact that the screening surface is made in the form of a square with a multi-screw perforated surface, equipped with helical grooves inside and outside the screening surface at an angle to its axis in the form of pockets of a polygonal shape, which provides not only an intensification of the interaction of the screening masses, but also a reduction in size by the length of the screen and the expansion of technological capabilities.

The novelty of the proposal lies in the fact that pockets are formed on the inner screening surface, which can vary both in shape and size along the perimeter of the screening surface, which provides a change in the direction of movement of the screened masses, as a result, productivity increases and technological capabilities expand.

The novelty lies in the fact that the screening surface is made hollow in the form of a square with a curved helical surface along the inner perimeter in the form of pockets of a multifaceted shape, which expands technological capabilities, with the same dimensions with a perforated surface made, for example, in the form of a torus, expand technological capabilities and increases the path (length) of the movement of the screened materials in a square screening surface, since the length along the perimeter of the torus (circle) of diameter D is L ₁ = πD, and the length along the perimeter of the square is L ₂ = 4D (L ₂ > L ₁ ).

The novelty is also due to the fact that the screening surface is mounted from four sections rigidly alternately rigidly connected to each other, made in the form of a circular perforated sector with four rectilinear perforated sections, which expands technological capabilities, since with the same dimensions with a perforated surface made in in the form of a torus, technological capabilities expand and the path (length) of the movement of screened materials in a square screening surface increases.

The novelty is seen in the fact that the pockets of the screening surface are made in the form of geometric shapes of a polygonal shape from at least one perforated strip, which expands the technological capabilities.

The novelty also lies in the fact that the pockets around the perimeter of the screening surface can be different not only in shape but also in size, which expands technological capabilities.

The novelty is also due to the fact that the distances between the fold lines of the pockets of the inner perforated surfaces are equal to each other and equal to the sum of the lengths of the perimeters of the geometric shapes of the pockets of the inner perforated surfaces, which expands the technological capabilities.

The novelty is due to the fact that the screening surface is made hollow, in the form of a square, with a curved screw perforated surface along the inner perimeter in the form of pockets of a multifaceted shape in the form of various geometric shapes with four or more sides, which provides not only the intensification of the interaction of the screened materials, increased productivity , but also the expansion of technological capabilities.

The novelty of the proposal lies in the fact that polygonal surfaces are formed on the inner surface of the screening surface, which along the perimeter can be different not only in shape but also in size, which provides a change in the direction of movement of the screened materials, resulting in increased productivity and expanded technological capabilities.

The novelty is due to the fact that the sections from which the screening surface is assembled are mounted around the perimeter from perforated strips with quadrangles marked on them, different in area and size, so the intensity and productivity of screening of materials increases, technological capabilities expand.

The novelty of the proposal also lies in the fact that along the entire perimeter of the screening surface, the passage section varies not only in shape, but also in area, which provides alternate compression and expansion of screening materials in each section of the screening surface, which means increased productivity and expanded technological capabilities.

The novelty of the invention lies in the fact that the quadrangles of the perforated strips from which the sections are mounted are not only inclined to each other, but also to the symmetry axis of the screening surface, therefore, the compression ratio of the screened materials increases, the screening process is intensified.

The novelty also lies in the fact that the screening surface is made of perforated sections and subsections, the walls of which are not only inclined to each other, but also to the direction of rotational motion of the screened materials moving under the influence of vibration in planes perpendicular to the cross-section of the screening surface, which complicates the trajectory their movements and increases the intensity of screening and expands technological capabilities.

The novelty is due to the fact that the sections from which the screening perforated surface is assembled are mounted around the perimeter from perforated strips with quadrangles marked on them, different in size and size, so the intensity and efficiency of screening increases, and technological capabilities expand.

The novelty of the proposal also lies in the fact that along the entire perimeter of the perforated screening surface, the passage section varies not only in shape, but also in area, which provides alternate compression and expansion of screening masses in each section of the screening surface, which means increased productivity, efficiency, reduction dimensions and expansion of technological capabilities.

The novelty of the invention lies in the fact that the quadrangles of the perforated strips from which the sections are mounted are not only inclined to each other, but also to the axis of symmetry of the screening surface, so the compression ratio of the screened mass increases and the screening process is intensified.

The novelty also lies in the fact that the screening surface is made of sections whose walls are not only inclined to each other, but also to the direction of rotational motion of the screening masses moving under the influence of vibration in planes perpendicular to the cross-section of the screening surface, which complicates the trajectories of their movement and increases screening intensity and expands technological capabilities.

The novelty also lies in the fact that when the vibrator is installed vertically, the rattled materials circulating inside the screening surface in planes perpendicular to its axis of symmetry receive additional movement from the walls of the pockets of the polygonal shape of all eight perforated sections inclined to each other, which expands technological capabilities and increases screening performance.

The invention is illustrated by drawings, where: in FIG. 1 shows a vibrating screen, general view; in FIG. 2 - a screening surface in the form of a square, top view; in FIG. 3 is a section AA in FIG. 2; in FIG. 4 - one of the four perforated sections, made in the form of a hollow circular perforated sector, top view; in FIG. 5 is a section BB in FIG. four; in FIG. 6 - perforated strip with marked straight bending lines and trimming lines of the edges of the quadrangles; in FIG. 7 - perforated strip after trimming the edges of the quadrangles; in FIG. 8 - perforated strip after trimming the edges of the quadrangles, bent along the straight lines of the fold; FIG. 9 is a perspective view of a perforated strip folded into a subsection ring; in FIG. 10 - one of four hollow rectilinear perforated sections with pockets of a polygonal shape, general view; in FIG. 11 is a section bb in FIG. 10; in FIG. 12 is a perforated strip with marked fold lines in the form of straight lines for pockets of a polygonal shape of a hollow rectilinear perforated section in FIG. 10; in FIG. 13 - perforated strip, bent in straight lines with the formation of pockets of a polygonal shape; FIG. 14 is a perspective view of a perforated strip folded into a cylindrical coil.

The vibrating screen (Fig. 1) consists of a bed 1, on which, using elastic elements, such as springs 2, an unloading device “P” is elasticly fixed and provided with a vibrator 3, to which a toroidal screening surface 4 is rigidly attached. The loading device is not shown in the drawings .

The screening surface 4 (Fig. 2, Fig. 3) is made in the form of a square (Fig. 2) with a polygonal screw surface along the inner perimeter (Fig. 3) in the form of pockets of a polygonal shape and is mounted from four perforated sections rigidly connected alternately to each other 5, 6, 7, 8, made in the form of a circular perforated sector with four rectilinear perforated sections 9, 10, 11, 12 (Fig. 2).

Perforated sections 5, 6, 7, 8 (Fig. 4) with a polyhedral helical surface along their inner perimeter are made of perforated subsections 13 (one of the perforated subsections in Fig. 4 is highlighted by solid thickened lines) interconnected by known methods, for example, by welding, adhesive, etc., with the formation of helical lines on the outer and inner surfaces (in Fig. 4, one of the helical lines is shown by a thickened line 14-15-16-17-18-19-20-21-22) and polygonal helical surfaces shapes in the form of various geometric figures with four with three or more lateral sides, for example a rectangle, a trapezoid, a rhombus, etc., in the form (Fig. 5) of pockets of the outer surface 23, 24, 25, 26, 27, 28 and pockets of the inner surface of a polygonal shape 29, 30, 31 , 32, 33, 34.

Each of the perforated subsections 13 is made in the form of a circular sector (Fig. 4, Fig. 5) and is mounted from the perforated strip 35 (Fig. 6, Fig. 7), on which rectangles are marked, along the diagonals of which there are fold lines passing through the points 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59 at distances of one another from a friend equal to the length of the side of the geometric figure, for example, as in FIG. 6, at a distance L ₁ L ₂ , L ₃ . The fold lines of the perforated strip 35 are shown in FIG. 6 thickened line. On the perforated strip 35, the trim lines 60 of the edges of the perforated strip 35 shown in FIG. 6 dash-dot line with two dots. After marking along the line of trimming of the edges 60, the sections of the perforated strip 35 (in Fig. 6 these sections of the perforated strip 35 are shaded) are cut off and the perforated strip 35 takes the form shown in FIG. 7, in which the fold lines of the perforated strip 35 are different in length L ₄ , L ₅ , L ₇ , L ₈ , L ₉ , L ₁₀ , L ₁₁ , L ₁₂ , L ₁₃ , L ₁₄ , L ₁₅ , L ₁₆ . L ₁₇ , L ₁₈ , L ₁₉ , L ₂₀ , L ₂₁ , L ₂₂ , L ₂₃ , L ₂₄ , L ₂₅ , L ₂₆ , L ₂₇ .

The perforated strip 35 (Fig. 7) after trimming the edges of the rectangles along the cropping lines 60 is bent in straight lines - bend lines 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47. 48, 49 , 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, placed at an angle α to the edges of the perforated strip 35 (Fig. 8) with the formation of different-sized quadrangles with two parallel sides - i.e. along the diagonals passing through the points 36-59 of the rectangles (Fig. 6) parallel to each other, and then collapsed into a ring 13 with a polyhedral perforated surface, as shown in Fig. 9. The transverse edges 62 and 63 of the perforated strip 35 (Fig. 6, Fig. 7) after folding into a ring 14 are connected by known methods, for example, welding, soldering, etc., with the formation of a perforated subsection 13 in the form of a circular ring 13 (Fig. . 9).

Thus, the perforated sections 5, 6, 7, 8 (Fig. 4, Fig. 5) are made around the perimeter in the form of a multiple helical surface with helical lines that vary in diameter of the perforated section with a step along the perimeter of the perforated section (one of the helical lines is shown in Fig. 4 with a thickened line 14-15-16-17-18-19-20-21-22) and helical grooves inside and outside the sections 5, 6, 7, 8 in the form of pockets of a polygonal shape, at an angle to the axis of the sections 5 , 6, 7, 8.

Perforated sections 5, 6, 7, 8 (Fig. 4, Fig. 5) with a screw surface along the inner and outer perimeter with the formation of pockets of a polygonal shape can be made in other ways.

Four hollow rectilinear perforated sections 9, 10, 11, 12 (FIG. 10, FIG. 11) with polygonal pockets, for example perforated section 10, are made of at least one strip 63 connected along the longitudinal edges 64 (shown in Fig. 10 by a dash-dot line) by known methods, for example by welding, with the formation of helical lines along the outer and inner surfaces (in Fig. 10, one of the helical lines is shown by a thickened line 65-66-67-68-69-70-71-72-73 -74-75-76) and screw surfaces (Fig. 11) of a rectangular shape in the form of pockets of the outer surface ited 77, 78, 79, 80, 81, 82 and the inner surface of the pockets 83, 84, 85, 86, 87, 88.

The perforated strip 63 (Fig. 12, Fig. 13) is bent along straight lines 89 at equal angles α to the longitudinal edges 64 of the perforated strip 63 placed at distances equal to the lengths of the polygon elements of the pockets, for example, for pocket 80 at distances L ₁ , L ₂ , L ₃ .

After bending along straight lines (Fig. 12, Fig. 13), the perforated strip 63 is folded into cylindrical coils (Fig. 14) connected to each other along the longitudinal edges 64 by known methods, for example, by welding, into hollow straight-line perforated sections 9, 10, 11, 12.

Hollow rectilinear perforated sections, for example 9, 10, 11, 12, with polygonal pockets are rigidly connected alternately with hollow perforated sections 5, 6, 7, 8 with polygonal pockets (Fig. 2) along the connecting lines II, II-II, III-III, IV-IV, VV, VI-VI, VII-VII, VIII-VIII with the formation of a continuous hollow screening surface 4 in the form of a square with pockets of a polygonal shape along its inner perforated perimeter.

The vibrating screen works as follows.

The perturbing force of the vibrator 3 through the walls of the screening surface 4 is transmitted to the particles of material to be screened inside the screening surface 4 by means of a loading device (not shown in the drawings). Particles of screening materials under the influence of vibration rotate in planes perpendicular to the axis of symmetry of the hollow screening surface and pockets of a polygonal shape around its perimeter. The presence of polygonal pockets along the inner perimeter of the screening surface 4 changes the direction of movement of the screened materials, as a result of which the screened materials not only acquire directional movement from loading to unloading, but also compression zones are formed along the entire length of the path of the screened materials inside the screening surface 4, increases screening performance, expanding technological capabilities.

The materials to be screened not only intensively interact with each other, but also, under the influence of vibration, rotate in a plane perpendicular to the bore of the sifting perforated surface 4. Since the cross-sectional dimensions along the length of the sifting surface 4, the shape and location change, it is aggravated disturbance of the movement of particles of crashing materials, i.e. there is an increase in screening performance. The presence of helical surfaces and helical lines around the perimeter of the screening surface 4 ensures the movement of the screening materials not only in hollow rectilinear sections of the screening perforated surface 4, but also in hollow perforated sections made in the form of a circular perforated sector, which contributes not only to complicate the trajectories of their movement, but and their movement along the bore of the screening surface 4 from loading to unloading. When the screening materials move along the cross-section of the screening surface 4 due to changes in the cross-section in shape and size, compression and rarefaction zones are formed in each section of the screening surface 4 over its entire volume, which also intensifies the screening process and expands technological capabilities.

Technical and economic advantages arise due to the implementation of the screening surface of the vibrating screen in the form of a square, the inner surface of which is equipped with unidirectional helical lines and helical surfaces in the form of pockets of a polygonal shape, and also due to the fact that particles of crashing materials under the influence of vibration rotate in planes perpendicular to the axis of symmetry of the hollow perforated screening surface and pockets of a polygonal shape along its perimeter, as well as behind due to the fact that when the screened materials move along the cross-section of the screening surface due to changes in the cross-section in shape and size, compression and rarefaction zones are formed in each cross-section of the screening surface throughout its volume, which intensifies the screening process and expands technological capabilities.

Thus, the disturbing force of the vibrator 3 through the walls of the screening surface 4 is transmitted to the masses of the screening material located inside the screening surface 4. The particles of the mass of the screening materials make a complex movement, during which the screening process occurs. Particles of the mass of the screened materials not only intensively interact with each other, but also under the influence of vibration rotate in a plane perpendicular to the bore of the sifting surface 4. Since the length of the sifting surface 4 is the cross-sectional size, shape and location, the disturbance of movement is aggravated particles of screening material, i.e. there is an increase in screening intensity. The presence of helical surfaces and helical lines around the perimeter of the screening surface 4 contributes not only to complicate the trajectories of their movement, but also to move along the passage section of the screening surface 4. When the masses of the screened material move along the passage section of the screening surface 4 due to a change in the passage section in shape and size alternately, compression and rarefaction zones are formed in each section of the screening surface 4 over its entire volume, which also intensifies the screening process and expands technologically opportunities.

Technical and economic advantages arise due to the fact that the screening surface is elastically mounted on the bed, equipped with a vibrator and made in the form of a square, the perforated surface of which is provided with unidirectional helical lines and screw perforated surfaces in the form of pockets of a polygonal shape, which provide an increase in the frequency and energy consumption of particle interaction screening materials with each other and with perforated walls of pockets of a polygonal shape, provides a change in direction the movement of the masses of the screened material, as well as reducing the size of the screen along the length and expanding technological capabilities.

Claims (1)

A vibrating screen containing a screening surface, a drive, loading and unloading devices, characterized in that the screening surface is resiliently mounted on a bed, equipped with a vibrator and made hollow, in the form of a square, with a multi-screw perforated surface along the inner perimeter and multi-faceted pockets in the form of various geometrical figures with four or more lateral sides and is mounted from four hollow perforated sections rigidly alternately connected to each other made in the form of a hollow circular perforated sector with four hollow rectilinear perforated sections, and four perforated sections made in the form of a hollow circular perforated sector made of a perforated strip, rolled into a ring with a polyhedral surface and the formation of different sizes of quadrangles with two parallel sides, parallel to each other with the formation of perforated subsections, while the perforated subsections are connected are connected with each other by the free sides of the said quadrangles in the form of a hollow circular perforated sector, made with a multi-helical perforated surface, provided with helical grooves inside the circular perforated sector at an angle to its axis in the form of pockets of polygonal shapes of various geometric shapes with four or more lateral sides, the distance between straight fold lines is equal to the length of each element of the polygon, and four hollow rectilinear perforated The sections are made of at least one perforated strip bent along straight lines placed at an angle to the edges of the perforated strip, with the formation of parallelograms located on the strip alternately in opposite directions, while the perforated strip is folded into cylindrical coils connected to each other along the longitudinal edges with the formation on the outer surface of unidirectional broken helical lines, and on the inner perforated surface - broken helical pockets of a polygonal shape, in de different geometric figures with four or more lateral sides, which along the perimeter can be different not only in shape but also in size, while the distances between the fold lines are equal to each other and equal to the sum of the lengths of the perimeters of the geometric figures of pockets of internal perforated surfaces.

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