RU2768573C2 - Vibrating screen - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: proposed invention relates to the mining, coal industry, namely to devices for the separation of lump and bulk materials to particles of different size. A vibrating screen includes at least two cardan shafts, at least two rubber couplings, at least two lifting beams, a drive, a vibration excitatory, at least two sides made of solid sheet material, while sides are fixed to each other by transverse beams with square section, and soundboards are installed on beams with guides made of polyurethane fixed on them, made with a lock fastening. A sub-vibratory beam is installed between sides. Sieving surfaces are fixed on guides.

EFFECT: increase in the reliability of the screen and, consequently, increase in the service life of the screen.

9 cl, 13 dwg

Description

Vibrating screen

Application area

[001] The invention relates to the mining, coal industry, namely, to devices for separating lumpy and bulk materials into particles of different sizes using screening surfaces with calibrated holes (of a certain length and width). It is used for screening rocks, bulk building materials, in laboratories for fractional analysis of bulk materials. It is also used for dehydration of various materials (enriched coal, washed ores).

State of the art

[002] A vibrating screen is known SU 1235555 (publ. 06/07/198). The screen contains a frame, a box in the form of separate sections, fixed on the frame with the help of shock absorbers. Each section of the box is equipped with a high-frequency vibrator. The sieve is also made of separate sections interconnected by flexible bands. Each section of the sieve is fixed on rigid frames. The aim of the invention is to improve the quality of the screening process by ensuring the same fluctuations over the entire surface of the sieve.

[003] The disadvantages of this technical solution are low reliability due to the use of a box made in the form of separate sections.

[004] Also known from the prior art vibrating screen for sorting municipal solid waste RU112651 (publ. 20.01.2012). A vibrating screen for sorting municipal solid waste, including a box, a vibration exciter and a working surface made in the form of several horizontal tiers, each tier being formed by a transverse support beam and parallel wedge-shaped grate plates attached to it at one end, the opposite end of which is left free, at the same time, the grates of each tier form screening gaps between themselves, characterized in that the physical parameters of the plates are selected in such a way as to ensure the frequency of free vibrations of the plates corresponding to the condition 1.05fv≤fc≤1.20fb, where fc is the frequency of free vibrations of the plates; fв - frequency of forced vibrations of the plates.

[005] The disadvantage of such a screen is the insufficiently reliable execution of the tiers, which are formed by a transverse support beam and attached to it at one end by parallel wedge-shaped grate plates in vertical projection, low reliability of the execution of such tiers occurs, among other things, due to the use of a circular cross-section beam.

[006] In addition, a vibrating screen RU 176729 (publ. 25.01.2018) is known.

[007] The utility model relates to devices for separating bulk materials by size and can be used in the mining, metallurgical, construction industries, etc. The vibrating screen contains a carrier box with sides mounted on elastic supports, and a vibration drive kinematically connected to the box. The sieve screen is equipped with vertical longitudinally oriented partitions, which have a wavy shape in plan. Partitions divide the sieve into screening troughs separated from each other by gaps. The screening troughs have a constant flow area along their length. The height of the partitions is guaranteed to exceed the height of the bulk layer. The bottoms of the troughs and the bottoms of the gaps lie in the same plane and form a single sieve bottom. The holes in the perforated partitions have the same determining size as the holes in the bottom of the screening troughs, and the holes in the bottom of the gaps are much larger. The purpose of the gaps is to ensure the fastest removal of the material that enters them, sifted through the holes in the partitions. The use of specially designed baffles and the division of the sieve into functional zones leads to an increase in specific productivity and screening efficiency.

[008] The disadvantage of such a screen is the location of the vibration drive and its connection with the box, which helps to reduce the service life of the screen due to the impact of the vibration drive on the sides of the box, the disadvantages include making the sides of the box welded, which reduces their reliability under vibration loads.

[009] Known vibrating screen RU 144479 (publ. 20.08.2014)

[0010] A vibrating sinter screen, including a body with sides, a vibration exciter, a receiving and screening surface, made of metal sheets sectional along the length and width of the screen, fixed with bolted joints on U-shaped support elements of a given thickness, characterized in that the sheets the receiving surface is made thicker than the thickness of the sheets of the screening surface, and the horizontal shelf of the U-shaped support element is made thicker than the thickness of each of its vertical walls, and the forming surface of the bolt head, each of the mentioned bolted connections, is equipped with at least one flat, with In this case, the head is placed between the vertical walls of the U-shaped supporting elements.2. Vibrating screen according to claim 1, characterized in that the thickness of the sheets of the receiving surface is 1.8÷2.2 of the thickness of the sheets of the screening surface.3. Vibrating screen according to claim 1, characterized in that the thickness of the horizontal shelf of the U-shaped support element is 1.7÷2.3 of the thickness of each of its vertical walls. Vibrating screen according to claim 1, characterized in that each of the bolted connections is equipped with a set of annular spring washers.

[0011] The disadvantage of this screen is the lack of reliability caused by the way the screening surface is attached, as well as the presence of breathers in the vibrators, as a result of which coal dust can accumulate there and the vibrator can fail.

[0012] The screen US 2016256895 (publ. 09/08/2018) is also known, selected as a prototype.

[0013] The screen includes elements of elastic screen lining, which are attached to the first and second crossbars, and the first and second crossbars are alternately located in the vibrating frame of the screening device. The first crossbars are rigidly connected to the frame, and the second crossbars are installed in the frame using spring elements. The frame has holes for accommodating spring elements, the holes being located in the area of the ends of the second crossbars.

[0014] The disadvantage of such a screen is that the sides of the screen are welded, in addition, the transverse beams do not have a large margin of safety, as a result of which the life of the screen is reduced.

Short description

[0015] The objective of the claimed device is the effective screening of rocks, bulk building materials, that is, the effective separation of lumpy or bulk materials into particles of different sizes using screening surfaces with calibrated holes, as well as separation into classes of various bulk materials and mineral processing.

[0016] The technical result of the claimed invention is to increase the reliability of the screen and, as a result, increase the life of the screen.

[0017] The technical result is achieved by increasing the strength characteristics of the screen design, by means of the fact that the vibrating screen includes at least two cardan shafts, at least two rubber couplings, at least two lifting beams, a drive, a vibration exciter, at least two sides made of solid sheet material, while the sides are fastened together by transverse beams having a square section, and decks are installed on the beams, with guides fixed to them, made with a lock, and screening surfaces are fixed on the guides, between a subvibrator beam is installed on the sides.

[0018] It is possible to perform a vibrating screen, in which the sides of the screen are covered with an elastic material.

[0019] It is possible to perform a vibrating screen, in which the transverse beams are covered with an elastic material.

[0020] It is possible to perform a vibrating screen, in which the vibration exciter is sealed.

[0021] It is possible to perform a vibrating screen, in which the transverse beams are pre-heat-treated.

[0022] It is possible to perform a vibrating screen in which the subvibrator beam is thermally treated.

[0023] It is possible to perform a vibrating screen, in which the entire structure of the screen is fastened with HACK bolts (HUCK bolts).

[0024] It is possible to perform a vibrating screen, in which the drive is located on the outside of the board.

[0025] It is possible to perform a vibrating screen, in which the drive is placed between the sides.

[0026] It is possible to perform a vibrating screen, in which the guides are made of polyurethane.

Description of drawings

[0027] Figure 1 shows a general view of the vibrating screen

[0028] Figure 2 shows a general view of the vibrating screen with a demonstration of the transverse beams.

[0029] Figure 3 shows a general view of the subvibrator beam.

[0030] The figure 4 shows the side of the vibrating screen.

[0031] Figure 5 shows a lockable guide.

[0032] The figure 6 shows the location of the drive from the outside.

[0033] The figure 7 shows the location of the drive between the sides of the screen.

[0034] Figures 8, 9, 10, 11, 12, 13 show embodiments of the vibrating screen.

[0035] Position 1 - lifting beam

[0036] Position 2 -board

[0037] Position 3 - subvibrator beam

[0038] Position 4 - cross beam

[0039] Position 5 - Actuator

[0040] Position 6 - screening surface

[0041] Position 7 - Guide

[0042] Position 8 - deck

Detailed description of the invention

[0043] In the following detailed description of the invention, numerous implementation details are provided to provide a clear understanding of the present invention. However, it will be obvious to one skilled in the art how the present invention can be used, both with and without these implementation details. In other cases, well-known methods, procedures, and components are not described in detail so as not to unduly obscure the features of the present invention.

[0044] The vibrating screen includes: at least two cardan shafts, at least two rubber couplings, at least two lifting beams 1, a drive 5, a vibration exciter, at least two sides 2, which are made of solid sheet material and do not have welds, and therefore have greater strength and reliability in comparison with welded sheets, tk. under the action of vibration in the places of welds, microcracks can occur, which over time under the action of vibration and shock loads can grow, which leads to a violation of the integrity of the board 2 and failure of the screen, while the boards 2 made of solid sheet material are resistant to the formation microcracks, because do not have welds and therefore have greater strength, reliability and durability, which affects the increase in the strength and reliability of the screen design and, as a result, the increase in the service life of the screen, for the manufacture of sides 2 of the vibrating screen, various metal alloys can be used, most preferably, the sides 2 are made of steel ;

[0045] at the same time, the sides 2 are fastened together by cross beams 4 having a square section, the cross beams 4 of a square section are made of various metal alloys, it is preferable to make the cross beams 4 from steel, the execution of the cross beams 4 in the form of a pipe with a square section provides greater reliability construction due to the presence of stiffeners in hollow cross beams with a square section, so if the bending force is directed at an angle of 90 degrees to the profile edge, the bending resistance is the same anywhere in the pipe. The bending load is strongest at the edges of the profile, while its central part is much more stable, in addition, due to the uniform distribution of metal along the perimeter of the profile, square pipes are characterized by high radii of gyration in relation to their cross-sectional area, so the use of cross-beams with a square section increases strength characteristics of the design of the vibrating screen, which leads to an increase in the reliability of the design of the vibrating screen as a whole;

[0046] decks 8 are installed on the beams, with guides 7 fixed on them, made of polyurethane with locking fastening, screening surfaces 6 are fixed on the guides 7, which ensures quick detachment, and also eliminates wear of the screen elements at the attachment point, because there are no mounting holes in places where vibration can cause backlash and over time the structure becomes loose due to which the strength and reliability of the structure and, as a result, the service life decreases, thus, the use of locking guides eliminates the wear factor of the fastening elements under the action of vibration, except In addition, the guide 7 made with a locking fastening provides a tight attachment of the screening surface 6 to the guide 7, as well as the implementation of the guide 7 made of polyurethane ensures the compliance of the locking and tight attachment of the screening surface 6, in addition, the screening surface 6 is quickly detachable for its quick replacement; a subvibrator beam 3 is installed between the sides.

[0047] It is possible to perform a vibrating screen, in which the sides 2 of the screen are covered with an elastic material, which ensures the damping of vibrations propagating on the sides 2 of the screen and, as a result, prevents the occurrence of cracks on the sides of the 2 screen and various other negative consequences of vibration, in addition, the coating of the sides with an elastic material 2 screens provide protection against shock loads that occur due to uncontrolled, arbitrary movement of the screening material, i.e. various lumpy material, rocks, coal, etc., which in turn increases the strength of the sides 2, their reliability and, as a result, affects the increase in strength, reliability of the screen design as a whole and, as a result, an increase in the life of the screen. As an elastic material, polyurethane, rubber, rubber can be used, the most preferred option is the use of rubber "TYPE TOP".

[0048] It is possible to perform a vibrating screen in which the transverse beams 4 are covered with an elastic material, which ensures the damping of vibrations propagating on the transverse beams 4 and, as a result, prevents the occurrence of cracks and various other negative consequences of vibration, in addition, the coating of the transverse beams 4 with an elastic material provides protection against shock loads that occur due to uncontrolled, arbitrary movement of the sifted material, i.e. various lumpy material, rocks, coal, etc., which in turn increases the strength of the transverse beams 4, their reliability and, as a result, affects the strength and reliability of the screen design as a whole and, as a result, increases the life of the screen. As an elastic material, polyurethane, rubber, rubber can be used, the most preferred option is the use of rubber "TYPE TOP".

[0049] It is possible to perform a vibrating screen, in which the vibration exciter is made sealed, i. there are no breathers in it, and therefore dust generated from the sieved material does not enter the vibration exciter and, accordingly, the elements of the vibration exciter are not affected by small particles that negatively affect the operation of the vibration exciter and increase the wear of the vibration exciter parts, which reduces its reliability and durability, thus making the vibrating screen , in which the vibration exciter is made sealed, ensures the reliability of the vibration exciter, which affects the increase in the reliability of the screen, the increase in the strength characteristics of the screen structure as a whole and, as a result, the increase in the service life of the screen.

[0050] It is possible to perform a vibrating screen, in which the transverse beams 4 are pre-heat-treated, which provides a change in the internal structure of the material, the residual stresses of the transverse beams 4 are removed, which leads to an increase in the strength characteristics of the transverse beams 4 and increases their reliability, thus affecting the increase reliability of the screen and its strength and, as a result, an increase in the life of the screen.

[0051] It is possible to perform a vibrating screen, in which the subvibrator beam 3 is thermally treated, which provides a change in the internal structure of the material, residual stresses of the subvibrator beam 3 are removed, which leads to an increase in the strength characteristics of the subvibrator beam 3 and increases its reliability, thus affecting the increase in reliability screen and its strength and, as a result, an increase in the life of the screen.

[0052] It is possible to perform a vibrating screen, in which the entire structure of the screen is fastened with locking (HAK or Huck) bolts, that is, a two-piece metal fastening device used to simultaneously connect two or more metal parts. This fastening system consists of a pin with a transverse notch and a ferrule. With the help of a special tool (pneumatic-hydraulic or hydraulic), the ring is crimped on the pin and a strong one-piece, reliable, tight and safe connection is created that can withstand heavy loads.

[0053] Such bolts are characterized by high tensile and shear strength, regardless of the thickness of the materials being joined, as well as resistance to vibration, because due to their design features, HACK bolts (HUCK bolts) create high-strength and non-separable connections, which ensures an increase in the strength characteristics of the screen structure, an increase in the reliability of the screen and, as a result, an increase in the life of the screen. In addition, HACK bolts (HUCK bolts) provide high speed and ease of installation.

[0054] The possibility of placing the drive 5 in the middle of the screen, i.e. between the sides or on the outer side of the side 2 (on the side of the screen) ensures the convenience of its operation and the versatility of the vibrating screen.

[0055] Thus, thanks to the features of the claimed invention “vibrating screen”, an increase in the reliability of the screen is ensured due to an increase in the strength characteristics of the screen structure and, as a result, an increase in the life of the screen.

[0056] The declared design features are applicable to various versions of the vibrating screen, examples of embodiments are shown in figures 8, 9, 10, 11, 12, 13.

[0057] The present application materials provide a preferred disclosure of the implementation of the claimed technical solution, which should not be used as limiting other, private embodiments of its implementation, which do not go beyond the scope of the requested legal protection and are obvious to specialists in the relevant field of technology.

Claims (9)

1. Vibrating screen, including at least two cardan shafts, at least two rubber couplings, at least two lifting beams, a drive, a vibration exciter, at least two sides made of solid sheet material, while the sides are fastened together by transverse beams having a square section, and decks are installed on the beams, with polyurethane guides fixed on them, made with a lock, a sub-vibrator beam is installed between the sides, screening surfaces are fixed on the guides. 2. A vibrating screen according to claim 1, characterized in that the sides of the screen are covered with an elastic material. 3. A vibrating screen according to claim 1, characterized in that the transverse beams are covered with an elastic material. 4. Vibrating screen according to claim 1, characterized in that the vibration exciter is sealed. 5. Vibrating screen according to claim 1, characterized in that the transverse beams are pre-heat-treated. 6. Vibrating screen according to claim 1, characterized in that the sub-vibrator beam is thermally treated. 7. Vibrating screen according to claim 1, characterized in that the entire structure of the screen is fastened with HACK bolts. 8. Vibrating screen according to claim 1, characterized in that it is made with the possibility of placing the drive on the outside of the board. 9. Vibrating screen according to claim 1, characterized in that it is made with the possibility of placing the drive between the sides of the screen.

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