A fine vibration screening device for coal

Abstract

The present invention relates to the technical field of screening, and specifically provides a fine vibration screening device for coal, including a frame. A vibrating screen plate is arranged on the frame, and the vibrating screen plate is inclined and used for screening materials. A vibration assembly is also arranged on the frame, and the vibration assembly drives the vibrating screen plate to vibrate. The vibrating screen plate has a first screen plate and a second screen plate. The first screen plate and the second screen plate are both in the same plane as the vibrating screen plate, and the first screen plate and the second screen plate can sense the material distribution on both sides of the vibrating screen plate, so as to adjust the distribution of materials on the vibrating screen plate, making the materials gradually evenly distributed, so that the vibrating screen plate screens the materials evenly.

Description

Technical Field

[0001] The present invention relates to the technical field of screening, and particularly to a fine vibration screening device for coal. Background Art

[0002] A vibrating sieve plate is a device used for screening, filtering or separating particulate materials. Its working principle is to use vibration force to screen the materials on the sieve mesh. The vibrating sieve plate is widely used in industries such as mining, building materials, chemical industry, food, and medicine for processes such as screening, filtering, grading, and separating particulate materials.

[0003] For example, Chinese Patent CN111744777A discloses a vibrating sieve plate. This solution screens the materials by setting an inclined screening box and a buffer member. The materials fall on the sieve mesh and roll downward simultaneously, enabling the materials in the upper and lower layers to be screened by the sieve mesh, thereby achieving the function of uniform screening of the materials.

[0004] However, when the materials roll on the sieve mesh, they may be unevenly distributed on the sieve mesh. For example, when there are more materials on the left or right side, it will result in more materials on that side, and the screening effect will be much worse compared to the side with less distributed materials, thus leading to uneven screening of the materials. Summary of the Invention

[0005] Based on this, in view of the current problem of uneven screening of materials, it is necessary to provide a fine vibration screening device for coal.

[0006] The above object is achieved by the following technical solutions:

[0007] A fine vibration screening device for coal, comprising:

[0008] A frame, on which a vibrating sieve plate is provided. The vibrating sieve plate is inclined, and the materials fall on the vibrating sieve plate and roll under the action of gravity;

[0009] A vibration assembly, which is located on the frame. The vibration assembly drives the frame to vibrate so as to drive the vibrating sieve plate to vibrate, and the vibrating sieve plate vibrates to screen the materials;

[0010] The vibrating sieve plate has a first sieve plate and a second sieve plate. The first sieve plate and the second sieve plate are both in the same plane as the vibrating sieve plate. The first sieve plate and the second sieve plate are inclined along the direction of material rolling, and the first sieve plate and the second sieve plate are symmetrically arranged with respect to the midpoint connection line of the distance between the two, and the included angle between the two is an acute angle;

[0011] The first sieve plate and the second sieve plate can respectively sense the amount of materials on both sides of the vibrating sieve plate. The first sieve plate and the second sieve plate are configured to adjust the materials on both sides to be the same when the materials on both sides of the vibrating sieve plate are different.

[0012] Further, both ends of the first sieve plate and the second sieve plate are hinged to the vibrating sieve plate, and both ends of the first sieve plate and the second sieve plate can move along a direction perpendicular to the surface of the vibrating sieve plate. When there is more material on one end of the first sieve plate on the front side in the material conveying direction than on the other side, this side moves downward to make the first sieve plate inclined, and the first sieve plate diverts the material on this side to the other side; when there is more material on one end of the second sieve plate on the front side in the material conveying direction than on the other side, this side moves downward to make the second sieve plate inclined, and the second sieve plate diverts the material on this side to the other side.

[0013] Further, hinge assemblies are provided on both sides of the frame. The hinge assemblies are used to hinge the first sieve plate and the second sieve plate to the frame. The hinge assemblies include a first hinge rod and a second hinge rod. One end of the first hinge rod is vertically provided on the frame. The other end of the first hinge rod is hinged to one end of the second hinge rod, and a torsion spring is connected between the two. The other end of the second hinge rod is hinged to the first sieve plate or the second sieve plate. The included angle between the first hinge rod and the second hinge rod is an acute angle, and the included angle between the second hinge rod and the first sieve plate or the second sieve plate is an obtuse angle.

[0014] Further, the elastic coefficient of the torsion spring between the first hinge rod and the second hinge rod at one end of the first sieve plate and the second sieve plate on the front side in the material conveying direction is greater than the elastic coefficient of the torsion spring between the first hinge rod and the second hinge rod at one end on the rear side in the material conveying direction.

[0015] Further, locking assemblies are provided at one end of the first sieve plate and the second sieve plate on the rear side in the material conveying direction. The locking assemblies are used to limit the rotation direction of the first hinge rod and the second hinge rod.

[0016] Further, the locking assembly includes a locking block. The locking block is located between the first hinge rod and the second hinge rod, and the locking block limits the increase in the included angle between the first hinge rod and the second hinge rod.

[0017] Further, the vibration assembly includes eccentric vibrators symmetrically arranged on the frame and a rotating shaft rotatably arranged on the frame. The eccentric vibrators are fixedly arranged on the rotating shaft, and the rotation of the rotating shaft drives the eccentric vibrators to rotate.

[0018] Further, a driving component is arranged on the frame. The driving component includes a driving motor, and the driving motor is connected to a rotating shaft. The driving motor drives the rotating shaft to rotate.

[0019] Further, a support frame is arranged below the frame, and the support frame is used to support the frame.

[0020] Further, a support rod is arranged between the support frame and the frame, and the support rod can be telescopic.

[0021] The beneficial effects of the present invention are as follows:

[0022] By providing the first sieve plate and the second sieve plate, and the first sieve plate and the second sieve plate can sense the material distribution on both sides of the vibrating sieve plate, so as to adjust the material distribution on the vibrating sieve plate, making the material gradually evenly distributed, and thus enabling the vibrating sieve plate to screen the material evenly. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a coal fine vibrating screening device provided by an embodiment of the present invention;

[0024] Figure 2 is Figure 1 The front view of the coal fine vibrating screening device provided by an embodiment in

[0025] Figure 3 is Figure 1 The top view of the coal fine vibrating screening device provided by an embodiment in

[0026] Figure 4 is Figure 3 The sectional view of the coal fine vibrating screening device provided by an embodiment in

[0027] Figure 5 It is a schematic structural diagram of another angle of the coal fine vibrating screening device provided by an embodiment of the present invention.

[0028] Wherein:

[0029] 100, frame; 110, support frame; 120, support rod;

[0030] 200, vibrating sieve plate; 210, first sieve plate; 220, second sieve plate;

[0031] 300, hinge assembly; 310, first hinge rod; 320, second hinge rod;

[0032] 400, vibration assembly; 410, eccentric vibrator; 420, rotating shaft; 430, driving motor. Detailed Embodiments

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The serial numbers assigned to components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" used in this application, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] Next, reference is made to Figures 1 - 5 to describe a coal fine vibration screening device provided by this application.

[0037] A fine vibration screening device for coal is applicable to the vibration screening of materials, especially suitable for the fine screening of coal. It includes a frame 100, on which a vibrating sieve plate 200 is provided. A number of sieve holes (not shown in the figure) are opened on the vibrating sieve plate 200. The vibrating sieve plate 200 is inclined, that is, there is an angle between the vibrating sieve plate 200 and the horizontal plane, so that the materials falling on the vibrating sieve plate 200 roll on the vibrating sieve plate 200 under the action of gravity. A vibration assembly 400 is also provided on the frame 100. When the vibration assembly 400 vibrates, it drives the frame 100 to vibrate, so that the frame 100 drives the vibrating sieve plate 200 to vibrate. The materials vibrate while rolling on the vibrating sieve plate 200, thus realizing the screening of the materials. Since the sizes of the materials to be screened are not uniform, the distribution of the materials on the vibrating sieve plate 200 is not very uniform, resulting in different screening effects of the materials on both sides of the vibrating sieve plate 200. The screening effect of the side with more materials is worse, while the screening effect of the vibrating sieve plate 200 on the side with less materials is significantly better than that on the side with more materials.

[0038] Therefore, to solve the above problems, the vibrating sieve plate 200 of the present application has a first sieve plate 210 and a second sieve plate 220. Both the first sieve plate 210 and the second sieve plate 220 are movable sieve plates, while the other parts of the vibrating sieve plate 200 are fixed sieve plates, fixed on the frame 100 and unable to move. The first sieve plate 210 and the second sieve plate 220 are in the same plane as the vibrating sieve plate 200, specifically as Figure 1 and Figure 3 shown. The first sieve plate 210 and the second sieve plate 220 are inclined along the conveying direction of the materials (the conveying direction of the materials is Figure 3 the direction from right to left in

[0039] For example, taking Figure 2As shown, the conveying direction of the material is from right to left. When the material falls on the vibrating sieve plate 200 and there is more material on the lower side than on the upper side, when the material passes through the first sieve plate 210, the weight of the material on the lower side of the first sieve plate 210 is greater than that on the upper side. At this time, the first sieve plate 210 begins to adjust the distribution of the material, that is, the lower side of the first sieve plate 210 moves downward along the direction perpendicular to the surface of the vibrating sieve plate 200, and the upper side of the first sieve plate 210 moves upward so that the right side edge of the first sieve plate 210 bulges to play a role in guiding the material upward. That is, the subsequent material passing through the first sieve plate 210 will gradually move in the direction where there is less material on the upper side under the guiding action of the first sieve plate 210, making the material on the upper and lower sides gradually uniform; when there is more material on the upper side of the vibrating sieve plate 200 than on the lower side, when the material passes through the second sieve plate 220, the weight of the material on the upper side of the second sieve plate 220 is greater than that on the lower side, so that the upper side of the second sieve plate 220 moves downward along the direction perpendicular to the surface of the vibrating sieve plate 200, and the lower side of the second sieve plate 220 moves upward, making the right side edge of the second sieve plate 220 bulge, so as to play a role in guiding the material downward. That is, the subsequent material will gradually move to the side with less material on the lower side under the guiding of the second sieve plate 220, making the material gradually evenly distributed, so that the vibrating sieve plate 200 evenly screens the material.

[0040] Specifically, in this embodiment, hinge assemblies 300 are provided on both sides of the frame 100. The hinge assemblies 300 are used to hinge the two ends of the first sieve plate 210 and the second sieve plate 220 to realize the functions of the above-mentioned movement of the first sieve plate 210 and the second sieve plate 220. The hinge assembly 300 includes a first hinge rod 310 and a second hinge rod 320. As Figure 4 shown, one end of the first hinge rod 310 is vertically arranged on both sides of the frame 100, and the other end of the first hinge rod 310 is hinged to one end of the second hinge rod 320. A torsion spring (not shown in the figure) is arranged between the first hinge rod 310 and the second hinge rod 320. One end of the second hinge rod 320 is hinged to both ends of the first sieve plate 210 or the second sieve plate 220. The included angle between the first hinge rod 310 and the second hinge rod 320 is an acute angle, while the included angle between the second hinge rod 320 and the first sieve plate 210 or the second sieve plate 220 is an obtuse angle. The first sieve plate 210 and the second sieve plate 220 maintain the above state under the action of the torsion spring. When the material passing through the first sieve plate 210 or the second sieve plate 220 is uneven, that is, when there is more material on one side, the weight of the material can overcome the acting force of the torsion spring and press down the first sieve plate 210 or the second sieve plate 220, causing the first sieve plate 210 or the second sieve plate 220 to tilt. Since both ends of the first sieve plate 210 and the second sieve plate 220 are hinged to the second hinge rod 320, Figure 4 for example, Figure 4The figure shows a sectional view of the second sieve plate 220. When there is more material on the right side than on the left side, the right part of the second sieve plate 220 is pressed down, and the left part moves to the right, so that the height on the left side is higher than that on the right side. Combining with Figure 3 the top view shown, it can be seen that the inclination angle formed by the higher height on the left side than on the right side of the second sieve plate 220 can divert the subsequent more material on the right side to the less material on the left side, thereby playing a role in adjusting the material distribution on the vibrating sieve plate 200. Similarly, the first sieve plate 210 is the same, which will not be elaborated one by one here.

[0041] In a further embodiment, as Figure 3 shown, the elastic coefficient of the torsion spring between the first hinge rod 310 and the second hinge rod 320 at one end of the first sieve plate 210 and the second sieve plate 220 on the front side in the material conveying direction is greater than the elastic coefficient of the torsion spring between the first hinge rod 310 and the second hinge rod 320 at one end on the rear side in the material conveying direction. That is, the elastic coefficient of the torsion spring at the lower end of the first sieve plate 210 is greater than that at the upper end, while the elastic coefficient of the torsion spring at the upper end of the second sieve plate 220 is greater than that at the lower end.

[0042] It should be noted that, as Figure 3 shown, the above setting is to adapt to the situation that the material will first roll to the lower end of the first sieve plate 210 or the upper end of the second sieve plate 220 due to the inclination of the first sieve plate 210 and the second sieve plate 220. In the material conveying direction, that is, from the right side to the left side, during the screening process, there will be slightly more material on the right side than on the left side. This is because the screening time of the material on the left side is slightly longer than that on the right side, so there will be slightly more material on the right side than on the left side. Then the slightly more material on the right side will affect the weight judgment of the first sieve plate 210 and the second sieve plate 220 on the material. That is, on the premise of uniform material distribution, the material that first contacts the lower side of the first sieve plate 210 and the upper side of the second sieve plate 220 will be more than the material that contacts the upper side of the first sieve plate 210 and the lower side of the second sieve plate 220. Therefore, in order to balance the excess material, the elastic coefficient of the torsion spring at the lower side of the first sieve plate 210 and the upper side of the second sieve plate 220 is set to be larger, that is, the elastic coefficient of the torsion spring at this place is greater than the elastic coefficient of the torsion spring at the upper side of the first sieve plate 210 and the lower side of the second sieve plate 220. Thus, it is avoided that the situation that the adjustment of the material distribution on the screening plate by the first sieve plate 210 and the second sieve plate 220 is affected due to more material on the right side than on the left side of the vibrating sieve plate 200 occurs.

[0043] In a further embodiment, as Figure 3As shown in the figure, in order to make the first sieve plate 210 only used to adjust the material distribution on the upper side of the vibrating sieve plate 200, and the second sieve plate 220 only used to adjust the material distribution on the lower side of the vibrating sieve plate 200, a locking component is provided at one end of the first sieve plate 210 and the second sieve plate 220 on the rear side in the material conveying direction. The locking component is specifically used to limit the rotation direction of the second hinge rod 320 at the upper end of the first sieve plate 210 and the lower end of the second sieve plate 220. As Figure 4 shown, the locking component is used to limit the lower end of the second sieve plate 220, that is Figure 4 the leftward rotation of the second hinge rod 320 on the left side of the second sieve plate 220 in Figure 4 the figure, that is, to limit the increase in the angle between the second hinge rod 320 on the left side of the second sieve plate 220 and the first hinge rod 310 in

[0044] the figure, so that the second sieve plate 220 is only used to sense that there is more material on the right side and divert the more material on the right side to the direction of less material on the left side. Similarly, the locking component is used to limit the rightward rotation of the second hinge rod 320 on the right side of the first sieve plate 210, so that the first sieve plate 210 is only used to sense that there is more material on the left side and divert the more material on the left side to the direction of less material on the right side, so that the first sieve plate 210 and the second sieve plate 220 work independently without affecting each other, and the accuracy of the adjustment of the material distribution by the first sieve plate 210 and the second sieve plate 220 is improved.

[0045] It should be noted that the locking component is not limited to the above structure, and can also be a stop block provided on both sides of the frame 100 to limit the rotation direction of the first hinge rod 310 and the second hinge rod 320. Of course, it can also be other structures, which are not specifically limited here.

[0046] Specifically, the vibration component 400 includes an eccentric vibrator 410 and a rotating shaft 420. The rotating shaft 420 is rotatably arranged on the frame 100, and the eccentric vibrator 410 is fixedly arranged on the rotating shaft 420. The rotating shaft 420 rotates to drive the eccentric vibrator 410 to rotate. Since the fixed position of the eccentric vibrator 410 is eccentrically fixed on the rotating shaft 420, the frame 100 can be vibrated during the rotation of the eccentric vibrator 410 to drive the vibrating sieve plate 200 to vibrate.

[0047] In a further embodiment, a driving component is provided on the frame 100. The driving component is used to drive the two rotating shafts 420 to rotate. The driving component includes two driving motors 430. The two driving motors 430 respectively drive the two rotating shafts 420, and the rotation directions are opposite.

[0048] Specifically, a support frame 110 is provided at the bottom of the frame 100, and the support frame 110 is used to support the frame 100.

[0049] Specifically, a plurality of support rods 120 are provided between the support frame 110 and the frame 100. Both ends of the support rod 120 are universally connected to the frame 100 and the support frame 110. The support rod 120 is a hydraulic cantilever, making the vibration of the vibrating screen more stable.

[0050] Combined with the above embodiments, the specific working process of a coal fine vibrating screening device provided by the present application is described as follows:

[0051] Starting the device:

[0052] Turn on the drive motor 430. The drive motor 430 drives the rotating shaft 420 to rotate. The rotating shaft 420 drives the eccentric vibrator 410 to rotate, thereby causing the vibrating screen plate 200 to start vibrating.

[0053] Normal screening:

[0054] The material falls on the vibrating screen plate 200 and is evenly distributed on the vibrating screen plate 200. Under the action of its own gravity, the material rolls on the vibrating screen plate 200 and is screened on the vibrating screen plate 200 under the action of the exciting force. Since the material is evenly distributed on the vibrating screen plate 200, the vibrating screen plate 200 screens the material evenly.

[0055] Uneven material:

[0056] When the distribution of the material on the vibrating screen plate 200 is uneven, for example, Figure 3As shown in the figure, if there is more material distributed on the lower side than on the upper side, when the material passes through the first sieve plate 210, more material will overcome the acting force of the torsion spring between the first hinge rod 310 and the second hinge rod 320 at the lower side of the first sieve plate 210, causing the lower side of the first sieve plate 210 to move downward along the direction perpendicular to the surface of the vibrating sieve plate 200, while the upper side of the first sieve plate 210 moves upward, making the right side of the first sieve plate 210 bulge to play a role in guiding the material upward, and then gradually guiding the subsequent material upward. This process is a gradual one. When there is a little more material on the upper side, the guiding effect of the first sieve plate 210 will be a little weaker. Until the material on the upper and lower sides is evenly distributed, the first sieve plate 210 will reset, thus completing the adjustment of the material distribution; Similarly, if there is more material distributed on the upper side than on the lower side, when the material passes through the second sieve plate 220, more material will overcome the acting force of the torsion spring between the first hinge rod 310 and the second hinge rod 320 at the upper side of the second sieve plate 220, causing the upper side of the second sieve plate 220 to move downward along the direction perpendicular to the surface of the vibrating sieve plate 200, while the lower side of the second sieve plate 220 moves upward, making the right side of the second sieve plate 220 bulge to play a role in guiding the material downward, and then gradually guiding the subsequent material downward. Until the material on the upper and lower sides is evenly distributed, the second sieve plate 220 will reset, thus completing the adjustment of the material distribution.

[0057] Through the adjustment of the first sieve plate 210 or the second sieve plate 220, the material is evenly distributed on the vibrating sieve plate 200, thus avoiding excessive accumulation of material on one side during vibration, and further making the screening of the vibrating sieve plate 200 more uniform.

[0058] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0059] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A coal fine vibration screening device, characterized in that: include: A frame, wherein a vibrating screen plate is arranged on the frame, wherein the vibrating screen plate is arranged obliquely, and the material falls on the vibrating screen plate and rolls under the action of gravity; A vibration assembly, wherein the vibration assembly is located on the frame, the vibration assembly drives the frame to vibrate so as to drive the vibration screen plate to vibrate, and the vibration screen plate vibrates to screen the material; The vibrating screen plate comprises a first screen plate and a second screen plate, the first screen plate and the second screen plate are both in the same plane as the vibrating screen plate, the first screen plate and the second screen plate are arranged obliquely along the rolling direction of the material, and the first screen plate and the second screen plate are arranged symmetrically about a line connecting the midpoints of the distance between the first screen plate and the second screen plate, and the angle between the first screen plate and the second screen plate is an acute angle; The first sieve plate and the second sieve plate can respectively sense the amount of materials on both sides of the vibrating sieve plate, and the first sieve plate and the second sieve plate are configured so that when the materials on both sides of the vibrating sieve plate are different, the first sieve plate or the second sieve plate adjusts the materials on both sides to be the same; Both ends of the first screen plate and the second screen plate are hinged to the vibrating screen plate, and both ends of the first screen plate and the second screen plate can move in a direction perpendicular to the surface of the vibrating screen plate. When the first screen plate has more material on one end on the front side of the material conveying direction than on the other side, this side moves downward to tilt the first screen plate, and the first screen plate diverts the material on this side to the other side; when the second screen plate has more material on one end on the front side of the material conveying direction than on the other side, this side moves downward to tilt the second screen plate, and the second screen plate diverts the material on this side to the other side.

2. The coal fine vibration screening device according to claim 1, characterized in that: Hinge assemblies are provided on both sides of the frame, and the hinge assemblies are used to hinge the first sieve plate and the second sieve plate to the frame. The hinge assembly includes a first hinge rod and a second hinge rod, one end of the first hinge rod is vertically arranged on the frame, the other end of the first hinge rod is hinged to one end of the second hinge rod, and a torsion spring is connected therebetween, the other end of the second hinge rod is hinged to the first sieve plate or the second sieve plate, the angle between the first hinge rod and the second hinge rod is an acute angle, and the angle between the second hinge rod and the first sieve plate or the second sieve plate is an obtuse angle.

3. The coal fine vibration screening device according to claim 2, characterized in that: The torsion spring coefficient between the first hinge rod and the second hinge rod at one end of the first screen plate and the second screen plate on the front side of the material conveying direction is greater than the torsion spring coefficient between the first hinge rod and the second hinge rod at one end of the rear side of the material conveying direction.

4. The coal fine vibration screening device according to claim 3, characterized in that: The first screen plate and the second screen plate are provided with a locking assembly at one end on the rear side of the material conveying direction, and the locking assembly is used to limit the rotation direction of the first hinge rod and the second hinge rod.

5. The coal fine vibration screening device according to claim 4, characterized in that: The locking assembly comprises a locking block, wherein the locking block is located between the first hinge rod and the second hinge rod, and the locking block limits the increase of the angle between the first hinge rod and the second hinge rod.

6. The coal fine vibration screening device according to claim 1, characterized in that: The vibration assembly comprises an eccentric vibrator symmetrically arranged on the frame and a rotating shaft rotatably arranged on the frame, the eccentric vibrator is fixedly arranged on the rotating shaft, and the rotation of the rotating shaft drives the eccentric vibrator to rotate.

7. The coal fine vibration screening device according to claim 6, characterized in that: The frame is provided with a driving assembly, which includes a driving motor connected to the rotating shaft, and the driving motor drives the rotating shaft to rotate.

8. The coal fine vibration screening device according to claim 1, characterized in that: A support frame is arranged below the frame, and the support frame is used to support the frame.

9. The coal fine vibration screening device according to claim 8, characterized in that: A support rod is arranged between the support frame and the frame, and the support rod can be extended and retracted.

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