A high-frequency vibrating screen

Abstract

The present invention relates to the technical field of screening equipment, and specifically to a high-frequency vibrating screen, which includes a machine base, a screen box, a coarse screen plate, a supporting assembly, a guiding mechanism and an exciting mechanism; by arranging a guiding mechanism on the coarse screen plate, when the material on the coarse screen plate is unevenly distributed, the guiding mechanism guides the material so that the material is evenly distributed on the coarse screen plate, so that the coarse screen plate is fully utilized, and while the screening efficiency is improved, serious wear of the coarse screen plate and the position where the material contacts more is avoided, thereby extending the service life of the screen. By arranging multiple guiding mechanisms in the first direction and the second direction, more materials can be guided at the same time, and multiple guiding can be performed, so that the materials are distributed on the coarse screen plate faster and more evenly. By setting the guide bar to an upwardly convex arc, the bonded materials are crushed and separated, and the contact time between the material and the screen hole is increased, so that the screening result is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of screening equipment, and in particular to a high-frequency vibrating screen. Background Art

[0002] High frequency vibrating screen is widely used in screening and grading of various materials in mineral processing, coal preparation, chemical industry, brick making, food, pharmaceutical, alkali making, fertilizer, paper making and other industries due to its high screening efficiency, small amplitude and high screening frequency.

[0003] The existing high-frequency vibrating screen includes a base, a screen box, an exciter and a screen plate; for example, a high-efficiency high-frequency vibrating screen disclosed in publication number CN112845065A, and a circular vibrating screen disclosed in publication number CN116393354A; the high-frequency vibrating screen drives the screen box to vibrate through the exciter, and the screen box drives the screen plate to vibrate synchronously, thereby increasing the probability of contact between the material and the screen hole and providing better separation conditions. However, during the screening process of the high-frequency vibrating screen in the prior art, after the material is poured into the feed end, it is unevenly distributed on the screen, part of the screen cannot be used, and the part that contacts more with the material is more severely worn than the part that contacts less with the material. There is an urgent need for a high-frequency vibrating screen that can evenly distribute the material on the screen. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention proposes a high-frequency vibrating screen, which can evenly distribute materials on the screen, has higher screening efficiency, and prolongs the service life of the screen to a certain extent.

[0005] A high-frequency vibrating screen of the present invention adopts the following technical solution: comprising:

[0006] Machine base;

[0007] A screen box is arranged above the machine base and extends along a first direction, and a plurality of vertically arranged springs are connected between the screen box and the machine base; one end of the screen box is a feed end, and the other end is a discharge end;

[0008] A coarse screen plate is obliquely arranged in the screen box, and one end of the coarse screen plate close to the feed end is higher than the other end of the coarse screen plate close to the discharge end; the coarse screen plate comprises a plurality of screen plate units, each of which comprises at least two screen sheets spaced apart in a second direction, the second direction being perpendicular to the first direction; the screen sheets extend along the first direction and can move along the first direction; a plurality of screen sheets in each screen plate unit are fixedly connected, and the screen sheets of all the screen plate units are alternately and closely arranged so that all the screen plate units are overlapped;

[0009] A support assembly is arranged in the screen box and below the coarse screen plate, and is used to support the coarse screen plate;

[0010] A guide mechanism is installed on the coarse screen plate, and the guide mechanism is configured to make the material on the coarse screen plate evenly distributed on the coarse screen plate in the second direction; the guide mechanism includes a plurality of guide bars, and the two ends of the guide bars are respectively fixedly connected to two adjacent screen plates in a screen plate unit, and the guide bars are arc-shaped and convex upward; a plurality of guide bars in a guide mechanism are spaced and distributed in the first direction, and the connecting line of the ends of the plurality of guide bars is in a "V" shape with an opening toward the second direction; in an initial state, the distance between two adjacent guide bars in the first direction is the same; the coarse screen plate is connected to an adjustment component, and the adjustment component is used to drive the plurality of screen plate units to move in the first direction respectively, thereby changing the distance between two adjacent guide bars in the first direction;

[0011] The exciting mechanism is installed on the screen box, and is used to drive the screen box to vibrate.

[0012] Optionally, the adjustment assembly includes a plurality of adjustment electric cylinders, each of which is connected to a sieve plate unit, thereby driving the corresponding sieve plate unit to move in the first direction.

[0013] Optionally, each sieve plate unit includes N sieve plates; the guiding mechanism is provided with N-1 groups in the second direction, wherein N>2.

[0014] Optionally, a plurality of guide mechanisms are arranged in intervals in the first direction.

[0015] Optionally, at least one fine screen plate is provided below the coarse screen plate, and the coarse screen plate and the fine screen plate form a screen plate group, and the screen holes in the screen plate group gradually decrease from top to bottom.

[0016] Optionally, the excitation mechanism includes two high-frequency vibrators, which are coaxially arranged on both sides of the screen box in the first direction, and the high-frequency vibrators are used to drive the screen box to vibrate eccentrically, and the high-frequency vibrators are connected to a driving mechanism.

[0017] Optionally, the driving mechanism includes a main motor, a first pulley, a second pulley, a transmission belt and a coupling; the output end of the main motor is connected to the first pulley for synchronous rotation; the first pulley is connected to the second pulley through a transmission belt, and the second pulley is flexibly connected to the shaft of a high-frequency vibrator through a coupling.

[0018] Optionally, the support assembly includes a plurality of support columns extending along the second direction, the plurality of support columns are spaced apart in the first direction, and one end close to the feed end is higher than one end close to the discharge end.

[0019] Optionally, a mass sensor is provided on the support column.

[0020] The beneficial effects of the present invention are as follows: a high-frequency vibrating screen of the present invention provides a guiding mechanism on the coarse screen plate. When the material on the coarse screen plate is unevenly distributed, the guiding mechanism guides the material to make the material evenly distributed on the coarse screen plate, thereby making full use of the coarse screen plate and improving the screening efficiency. At the same time, serious wear of the position where the coarse screen plate contacts more with the material is avoided, thereby extending the service life of the screen to a certain extent.

[0021] Furthermore, by setting up multiple screen plate units, each screen plate unit includes a number of screen pieces, and an arc-shaped guide bar is set between two adjacent screen pieces in the same screen plate unit, the multiple screen plate units are moved in the first direction by adjusting the assembly, and the distance between two adjacent guide bars in the first direction is changed, thereby completing the guiding work of the material. At the same time, the bonded materials are broken and separated to a certain extent; further, the material will be blocked by the guide bar in the process of moving to the discharge end, which increases the contact time between the material and the screen hole to a certain extent, so that the material with a particle size smaller than the screen hole has sufficient time to fall below the coarse screen plate.

[0022] Furthermore, by arranging multiple guiding mechanisms in the first direction and the second direction, more materials can be guided at the same time when materials need to be guided, thereby enhancing the guiding effect on materials in the left and right directions, and can guide unevenly distributed materials multiple times, so that the materials can be distributed on the coarse screen plate faster and more evenly.

[0023] Furthermore, when the material is guided by the guide strips, the lengths of the sieve plates in the first sieve plate unit, the second sieve plate unit, the third sieve plate unit and the fourth sieve plate unit, which are extended out of the sieve box at one end close to the discharge end, are inconsistent. When the material falls from the coarse screen plate to the subsequent conveyor belt, it does not fall at the same time. The longer the sieve plates extend out of the sieve box, the later the material on it falls onto the conveyor belt, thereby avoiding the material falling onto the transmission belt at the same time and causing a greater impact on the transmission belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 An exploded view of the present invention;

[0027] Figure 3 A top view of the present invention;

[0028] Figure 4 A top view of the present invention when guiding materials from right to left;

[0029] Figure 5 A top view of the present invention when guiding materials from left to right;

[0030] Figure 6 for Figure 2 Enlarged view of point A in the middle;

[0031] Figure 7 for Figure 2 Enlarged view of point B in the middle.

[0032] In the figure: 100, machine base; 110, first fixed support seat; 120, second fixed support seat; 130, third fixed support seat; 200, screen box; 300, coarse screen plate; 310, first screen plate unit; 320, second screen plate unit; 330, third screen plate unit; 340, fourth screen plate unit; 350, screen piece; 360, fine screen plate; 400, support assembly; 410, support column; 420, support bar; 500, guide mechanism; 510, first guide assembly; 511, guide bar; 520, second guide assembly; 531, adjustment electric cylinder; 610, high frequency vibrator; 620, driving mechanism; 621, main motor; 622, first pulley; 623, transmission belt; 624, second pulley; 625, coupling. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 7 As shown, a high-frequency vibrating screen provided by an embodiment of the present invention includes a base 100, a screen box 200, a coarse screen plate 300, a support assembly 400, a guide mechanism 500 and a vibration excitation mechanism;

[0035] The base 100 includes two first fixed support bases 110, two second fixed support bases 120 and two third fixed support bases 130;

[0036] The screen box 200 extends along the first direction, i.e., the front-rear direction. The two first fixed support seats 110, the two second fixed support seats 120, and the two third fixed support seats 130 are respectively located on the left and right sides below the screen box 200; vertically arranged springs are connected between the screen box 200 and the first fixed support seats 110, the second fixed support seats 120, and the third fixed support seats 130; one end of the screen box 200 is a feed end, and the other end is a discharge end;

[0037] The coarse screen plate 300 is tiltedly arranged in the screen box 200, and one end of the coarse screen plate 300 close to the feed end is higher than the other end of the coarse screen plate 300 close to the discharge end;

[0038] The support assembly 400 is disposed in the screen box 200 and is located below the coarse screen plate 300 to support the coarse screen plate 300;

[0039] The guide mechanism 500 is installed on the coarse screen plate 300, and the guide mechanism 500 is configured to make the material on the coarse screen plate 300 evenly distributed on the coarse screen plate 300 in the second direction, that is, the left-right direction;

[0040] The vibration excitation mechanism is installed on the screen box 200, and the vibration excitation mechanism is used to drive the screen box 200 to vibrate.

[0041] When in use, the excitation mechanism is started, and the excitation mechanism drives the screen box 200 to vibrate synchronously. When the screen box 200 vibrates, it drives the coarse screen plate 300 to vibrate synchronously, and the material is poured into the screen box 200 from the feed end. As the coarse screen plate 300 vibrates, the material jumps on the coarse screen plate 300. Under the action of gravity and inertia, the material moves from the feed end to the discharge end, and the material smaller than the sieve hole size of the coarse screen plate 300 falls below the coarse screen plate 300, thereby completing the screening or grading work. When the material on the coarse screen plate 300 is unevenly distributed, the guide mechanism 500 guides the material so that the material is evenly distributed on the coarse screen plate 300, so that the coarse screen plate 300 is fully utilized, the screening efficiency is improved, and at the same time, the coarse screen plate 300 is prevented from being seriously worn at the position where the coarse screen plate 300 contacts more with the material, and the service life of the screen is extended to a certain extent.

[0042] In a further embodiment, the coarse screen plate 300 includes a plurality of screen plate units, each of which includes at least two screen plates 350 spaced apart in the second direction, the screen plates 350 extending along the first direction and movable along the first direction; the plurality of screen plates 350 in each screen plate unit are fixedly connected, and the screen plates 350 of all the screen plate units are alternately and closely arranged so that all the screen plate units are overlapped;

[0043] A guiding mechanism 500 includes a plurality of guiding bars 511, both ends of which are fixedly connected to two adjacent sieve plates 350 in a sieve plate unit, and the guiding bars 511 are arc-shaped and protrude upward; a plurality of guiding bars 511 in a guiding mechanism 500 are spaced apart in the front-to-back direction, and the connecting line of the ends of the plurality of guiding bars 511 is in a "V" shape opening to the left or right; in an initial state, the distance between two adjacent guiding bars 511 in the front-to-back direction is the same; the coarse sieve plate 300 is connected to an adjustment component, which is used to drive the plurality of sieve plate units to move in the front-to-back direction respectively, thereby changing the distance between two adjacent guiding bars 511 in the front-to-back direction.

[0044] like Figure 2 , Figure 3 In the illustrated embodiment, the coarse screen plate 300 includes four screen plate units, namely a first screen plate unit 310, a second screen plate unit 320, a third screen plate unit 330 and a fourth screen plate unit 340; a guide mechanism 500 includes eight guide bars 511; the guide bars 511 are arc-shaped and protrude upward; two groups of guide units are arranged between two adjacent screen plates 350 in the first screen plate unit 310, and one guide unit includes two guide bars 511 arranged at intervals in front and back; two groups of guide units are arranged between two adjacent screen plates 350 in the second screen plate unit 320, and one guide unit includes two guide bars 511 arranged at intervals in front and back; two groups of guide units are arranged between two adjacent screen plates 350 in the third screen plate unit 330, and one guide unit includes two guide bars 511 arranged at intervals in front and back; Two groups of guide units are arranged between two adjacent screen plates 350, and one guide unit includes two guide bars 511 spaced apart from each other in the front and rear directions; in one guide mechanism, the distance between the two guide bars 511 on the first screen plate unit 310, the second screen plate unit 320, the third screen plate unit 330 and the fourth screen plate unit 340 in the front and rear directions decreases successively; in one guide mechanism 500, the first four guide bars 511 from the feed end to the discharge end constitute the first guide assembly 510, and the four guide bars 511 in the first guide assembly 510 are arranged obliquely from left to right; the first four guide bars 511 from the discharge end to the feed end constitute the second guide assembly 520, and the four guide bars 511 in the second guide assembly 520 are arranged obliquely from right to left, and the connecting line of the ends on the same side of the eight guide bars 511 in one guide mechanism 500 is in a "V" shape with the opening facing left. In the initial state, the distance between two adjacent guide bars 511 in the first direction, i.e., the front and rear direction, is equal. Figure 3 shown.

[0045] When the material on the coarse screen plate 300 is evenly distributed, the material moves from the feed end to the discharge end under the action of gravity and inertia. During the jumping movement on the coarse screen plate 300, most of the material will pass over the guide bar 511 or pass through the bottom of the guide bar 511; some of the material will be blocked by the guide bar 511, and large pieces of material will collide with the guide bar 511 and become small pieces. At the same time, after the material is blocked by the guide bar 511, the contact time between the material and the sieve hole is increased to a certain extent, so that the material with a particle size smaller than the sieve hole has sufficient time to fall below the coarse screen plate 300.

[0046] When the material on the coarse screen plate 300 is unevenly distributed, and the material on the right side is more than the material on the left side, it is necessary to guide the material on the right side to the left, start the adjustment component, and adjust the coarse screen plate 300 to Figure 4 In the state shown, the distance between the multiple guide bars 511 in the second guide assembly 520 is reduced, and the material moves from the feed end to the discharge end under the action of gravity and inertia. However, in the process of jumping and moving on the coarse screen plate 300, the material is blocked by the multiple guide bars 511 when passing over the multiple close guide bars 511, and cannot pass smoothly. The material can only pass from under the multiple guide bars 511. Since the guide bars 511 in the second guide assembly 520 are tilted from top to bottom and from right to left, the material is guided from right to left, so that the material on the coarse screen plate 300 is evenly distributed in the left and right directions.

[0047] When the material on the coarse screen plate 300 is unevenly distributed, with more material on the left side than on the right side, the material on the left side needs to be guided to the right. At this time, the adjustment component is started to adjust the coarse screen plate 300 to Figure 5 In the state shown, the distance between the multiple guide bars 511 in the first guide assembly 510 is reduced, and the material moves from the feed end to the discharge end under the action of gravity and inertia. However, in the process of jumping and moving on the coarse screen plate 300, the material cannot smoothly pass over the multiple close guide bars 511, and can only pass from the bottom of the multiple guide bars 511. Since the guide bars 511 in the first guide assembly 510 are tilted from top to bottom and from left to right, the material is guided from left to right, so that the material on the coarse screen plate 300 is evenly distributed in the left and right directions.

[0048] When the coarse screen plate 300 is Figure 4 , Figure 5When in the state shown, the lengths of the screening plates 350 at one end close to the discharge end of the first screening plate unit 310, the second screening plate unit 320, the third screening plate unit 330, and the fourth screening plate unit 340 are inconsistent. When the material drops from the coarse screening plate 300 onto the subsequent conveyor belt, it does not drop simultaneously. The longer the screening plate 350 extends out of the screening box 200, the later the material on it drops onto the conveyor belt, thus avoiding a large impact on the conveyor belt 623 when the material drops onto the conveyor belt 623 simultaneously.

[0049] In a further embodiment, the adjustment assembly includes a plurality of adjustment electric cylinders 531, and each adjustment electric cylinder 531 is connected to a screening plate unit. As Figure 2 、 Figure 3 shown, there are four adjustment electric cylinders 531, which are respectively connected to the first screening plate unit 310, the second screening plate unit 320, the third screening plate unit 330, and the fourth screening plate unit 340. After starting the adjustment electric cylinder 531, it drives the corresponding screening plate unit to move in the front-back direction, and then reduces the distance between the plurality of guide bars 511 in the first guiding assembly 510 or the second guiding assembly 520, thereby completing the guiding of the material and making the distribution of the material on the coarse screening plate 300 tend to be uniform in the left-right direction; when there is more material on the right side than on the left side, the distance between the plurality of guide bars 511 in the second guiding assembly 520 is reduced, and the greater the material quantity difference, the smaller the distance between two adjacent guide bars 511; when there is more material on the left side than on the right side, the distance between the plurality of guide bars 511 in the first guiding assembly 510 is reduced, and the greater the material quantity difference, the smaller the distance between two adjacent guide bars 511.

[0050] In a further embodiment, each screening plate unit includes N screening plates 350; the guiding mechanism 500 is provided with N - 1 groups in the left-right direction, where N > 2. Figure 2 and Figure 3 In the embodiment shown in

[0051] and Figure 2 and Figure 3 shown, N = 3, each screening plate unit includes 3 screening plates 350, and the guiding mechanism 500 is provided with two groups in the left-right direction; thus, when guiding the material is required, more materials can be guided simultaneously, enhancing the guiding effect on the material in the left-right direction and making the material more quickly and evenly distributed on the coarse screening plate 300.

[0052] In a further embodiment, at least one fine screen plate 360 ​​is provided below the coarse screen plate 300. The coarse screen plate 300 and the fine screen plate 360 ​​form a screen plate group. The screen holes in the screen plate group gradually decrease from top to bottom, thereby completing the classification of materials with different particle sizes.

[0053] In a further embodiment, Figure 6 As shown, the excitation mechanism includes two high-frequency vibrators 610, which are coaxially arranged on the left and right sides of the screen box 200. The high-frequency vibrators 610 are used to drive the screen box 200 to vibrate eccentrically, and the high-frequency vibrators 610 are connected to a driving mechanism 620. The driving mechanism 620 includes a main motor 621, a first pulley 622, a second pulley 624, a transmission belt 623 and a coupling 625; the output end of the main motor 621 is synchronously rotated and connected with the first pulley 622; the first pulley 622 is connected with the second pulley 624 through the transmission belt 623, and the second pulley 624 is flexibly connected to the shaft of one high-frequency vibrator 610 through the coupling 625. During operation, the main motor 621 is started, and the main motor 621 drives the first pulley 622 to rotate synchronously. The first pulley 622 drives the second pulley 624 to rotate synchronously through the transmission belt 623. The second pulley 624 drives the shaft of the high-frequency vibrator 610 to rotate through the coupling 625. When the high-frequency vibrator 610 rotates, it drives the screen box 200 to vibrate eccentrically.

[0054] In a further embodiment, Figure 7 As shown, the support assembly 400 includes a plurality of support columns 410 and a plurality of support bars 420. The support columns 410 extend in the left-right direction, and both ends of the support columns 410 are respectively fixed to the two side plates of the screen box 200 in the left-right direction; the plurality of support columns 410 are spaced apart in the front-to-back direction, and the end close to the feed end is higher than the end close to the discharge end; the support bars 420 extend in the front-to-back direction, and the plurality of support bars 420 are spaced apart in the left-to-right direction.

[0055] In a further embodiment, a mass sensor is provided on the support column 410. During the screening process, the distribution of the material on the first screen can be known based on the mass sensor, and then the position of the screen 350 is adjusted by the driving assembly. Compared with manual observation, the results of the mass sensor are more accurate and reduce the operator's workload.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high frequency vibrating screen, characterized in that: include: Machine base; A screen box is arranged above the machine base and extends along a first direction, and a plurality of vertically arranged springs are connected between the screen box and the machine base; one end of the screen box is a feed end, and the other end is a discharge end; A coarse screen plate is obliquely arranged in the screen box, and one end of the coarse screen plate close to the feed end is higher than the other end of the coarse screen plate close to the discharge end; the coarse screen plate comprises a plurality of screen plate units, each of which comprises at least two screen sheets spaced apart in a second direction, the second direction being perpendicular to the first direction; the screen sheets extend along the first direction and can move along the first direction; a plurality of screen sheets in each screen plate unit are fixedly connected, and the screen sheets of all the screen plate units are alternately and closely arranged so that all the screen plate units are overlapped; A support assembly is arranged in the screen box and below the coarse screen plate, and is used to support the coarse screen plate; A guide mechanism is installed on the coarse screen plate, and the guide mechanism is configured to make the material on the coarse screen plate evenly distributed on the coarse screen plate in the second direction; the guide mechanism includes a plurality of guide bars, and the two ends of the guide bars are respectively fixedly connected to two adjacent screen plates in a screen plate unit, and the guide bars are arc-shaped and convex upward; a plurality of guide bars in a guide mechanism are spaced and distributed in the first direction, and the connecting line of the ends of the plurality of guide bars is in a "V" shape with an opening toward the second direction; in an initial state, the distance between two adjacent guide bars in the first direction is the same; the coarse screen plate is connected to an adjustment component, and the adjustment component is used to drive the plurality of screen plate units to move in the first direction respectively, thereby changing the distance between two adjacent guide bars in the first direction; The exciting mechanism is installed on the screen box, and is used to drive the screen box to vibrate.

2. A high frequency vibrating screen according to claim 1, characterized in that: The adjustment assembly comprises a plurality of adjustment electric cylinders, each of which is connected to a sieve plate unit, thereby driving the corresponding sieve plate unit to move in a first direction.

3. A high frequency vibrating screen according to claim 2, characterized in that: Each sieve plate unit includes N sieve plates; the guiding mechanism is provided with N-1 groups in the second direction, wherein N>2.

4. A high frequency vibrating screen according to claim 3, characterized in that: A plurality of guide mechanisms are arranged in intervals in the first direction.

5. A high frequency vibrating screen according to claim 1, characterized in that: At least one fine screen plate is arranged below the coarse screen plate. The coarse screen plate and the fine screen plate form a screen plate group. The screen holes in the screen plate group gradually decrease from top to bottom.

6. A high frequency vibrating screen according to claim 1, characterized in that: The excitation mechanism comprises two high-frequency vibrators, which are coaxially arranged on both sides of the screen box in the first direction, and are used to drive the screen box to vibrate eccentrically, and the high-frequency vibrators are connected to a driving mechanism.

7. A high frequency vibrating screen according to claim 6, characterized in that: The driving mechanism includes a main motor, a first pulley, a second pulley, a transmission belt and a coupling; the output end of the main motor is connected to the first pulley for synchronous rotation; the first pulley is connected to the second pulley through a transmission belt, and the second pulley is flexibly connected to the shaft of a high-frequency vibrator through a coupling.

8. A high frequency vibrating screen according to claim 1, characterized in that: The support assembly includes a plurality of support columns extending along the second direction. The plurality of support columns are spaced apart in the first direction, and one end close to the feed end is higher than the other end close to the discharge end.

9. A high frequency vibrating screen according to claim 8, characterized in that: A mass sensor is arranged on the supporting column.

Images