An intelligent multi-stage coal preparation device for coal mines

Abstract

The present invention belongs to the technical field of coal screening, and mainly mentions an intelligent multi-stage coal selection device for coal mines. It includes a frame, the frame is provided with a shielding frame, and a first elastic member is installed between the two, the shielding frame is fixed with a first filter plate and a second filter plate, the frame is installed with a transfer module, the frame is installed with a vibration module for driving the shielding frame to shake, the frame is rotatably connected to a support frame, the support frame is slidably connected to a discharge shell, the discharge shell is located above the first filter plate, the discharge shell is fixed to a limiting shell, the support frame is installed with a drive motor, and the output shaft of the drive motor is fixed to an extrusion plate. The present invention drives the discharge shell to move through the limiting shell, so that the coal in the discharge shell remains in a fluid state, reduces the probability of coal blocking the discharge shell, and promotes the coal to fall onto the first filter plate, ensuring the smooth progress of the screening work, thereby improving the screening efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of coal screening, and in particular to an intelligent multi-stage coal preparation device for coal mines. Background Art

[0002] In the process of coal mining and processing, intelligent multi-stage coal preparation equipment is an advanced coal sorting device that combines mechanical sorting technology, sensor monitoring, automated control, and data analysis algorithms. It aims to improve coal sorting efficiency, accuracy, and equipment operation stability through multi-stage linkage sorting and intelligent regulation. During the use of this multi-stage coal preparation device, coal is transported to the screening area through a feed pipe for classification. However, due to the varying sizes of coal particles and the presence of foreign matter (such as gangue and metal fragments), the feed pipe is prone to clogging. In addition, the feed pipe is usually not mechanically linked to the vibration system of the screening mechanism and is not equipped with a flexible connection or auxiliary vibration device. This further increases the probability of clogging of the feed pipe of the coal preparation device. Once the feed pipe is blocked, it will not only lead to the interruption of coal transportation and affect overall production efficiency, but may even cause safety problems such as equipment overload and damage. Summary of the Invention

[0003] In order to overcome the shortcomings described in the above background technology, the present invention provides an intelligent multi-stage coal preparation device for coal mines.

[0004] The filter press is located below the filter press and is provided with a first filter plate, a second filter plate and a second filter plate, the filter press is located below the filter press and is provided with a first filter plate and a second filter plate, the filter press is located below the filter press and is provided with a second filter plate, the filter press is located below the filter press and is provided with a second filter plate, the filter press is located below the filter press and is provided with a second filter plate, the filter press is located below the filter press and is provided with a second filter plate, the filter press is located below the filter press and is provided with a second filter plate, the filter press is located below the filter press and is provided with a second filter plate, the filter press is located below the filter press and is provided with a second filter plate,

[0005] As a preferred technical solution of the present invention, the buffer assembly includes:

[0006] A support rod, rotatably connected to a side of the support frame away from the extrusion plate;

[0007] The sliding block is hinged to a side of the support rod away from the support frame, and a second elastic member is provided between the sliding block and the frame.

[0008] As a preferred technical solution of the present invention, a dispersion plate is fixedly connected to the lower side of the discharge shell, and the dispersion plate is used to guide the material falling in the discharge shell.

[0009] As a preferred technical solution of the present invention, the upper side of the dispersion plate is provided with corrugated protrusions with gradually varying thickness.

[0010] As a preferred technical solution of the present invention, the side of the discharge shell close to the dispersion plate is rotatably connected to an interception plate, and a third elastic member is provided between the two, and the interception plate is located above the dispersion plate.

[0011] As a preferred technical solution of the present invention, the intercepting plate is a corrugated plate, and the crests of the intercepting plate correspond one-to-one to the crests of the corrugated protrusions on the dispersing plate, and the troughs of the intercepting plate correspond one-to-one to the troughs of the corrugated protrusions on the dispersing plate.

[0012] As a preferred technical solution of the present invention, it also includes:

[0013] An auxiliary screening mechanism is provided on the shielding frame and is used to change the vibration mode of the material on the shielding frame. The auxiliary screening mechanism includes:

[0014] A first frame is fixedly connected to the shielding frame;

[0015] The second frame has two parts, both of which are slidably connected to the shielding frame, a fourth elastic member is provided between the second frame and the shielding frame, the two second frames are slidably connected to the first frame, a fifth elastic member is provided between the second frame and the first frame, the two second frames are respectively located on both sides of the first frame, a guide filter plate is fixedly connected to the second frame, and the two guide filter plates are both in contact with the first filter plate;

[0016] The transition filter plate is fixed to the first frame and is located between the two guide filter plates.

[0017] As a preferred technical solution of the present invention, guide parts are provided on both sides of the guide filter plate for guiding the material.

[0018] As a preferred technical solution of the present invention, both the first frame and the shielding frame are provided with a plurality of wave grooves, and the second frame is located in the adjacent wave grooves and slides.

[0019] As a preferred technical solution of the present invention, it also includes:

[0020] A regulating mechanism is provided on the first frame and is used to control the movement of the two second frames. The regulating mechanism includes:

[0021] A mounting frame fixedly connected to the first frame;

[0022] There are two threaded rods, which are rotatably connected to both sides of the mounting frame respectively. The threaded rods are threadedly connected to a pushing frame, and the pushing frame is slidably connected to the mounting frame. The pushing frame is used to limit the adjacent second frame.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects: the present invention drives the discharge shell to move through the limiting shell, so that the coal in the discharge shell remains in a flowing state, reducing the probability of coal blocking the discharge shell, and prompting the coal to fall onto the first filter plate, ensuring the smooth progress of the screening work, thereby improving the screening efficiency.

[0024] The present invention buffers the extrusion force of the coal by deflecting the lower shell, reduces the impact force of the falling coal on the coal in the lower shell, reduces the probability that the falling coal squeezes the coal in the lower shell tightly and causes the compacted coal to block the lower shell, and simultaneously reduces the probability of the coal colliding with each other and causing it to be crushed, thereby ensuring the integrity of the coal.

[0025] The present invention guides the coal through the dispersion plate and the corrugated protrusions thereon, so that the coal will not be concentrated in a certain area, and the coal is evenly dispersed to the first filter plate, which reduces the accumulation of coal on the first filter plate and thus improves the efficiency of coal screening.

[0026] The present invention blocks the passing coal by using the intercepting plate, thereby reducing the moving speed of the coal and prolonging the time for the coal to pass through the first filter plate and the second filter plate, thereby improving the efficiency of coal screening.

[0027] On the basis of the circumferential vibration of the second frame, the present invention further changes the vibration mode of the second frame, so that the second frame drives the coal to fully vibrate through the guide filter plate thereon, thereby increasing the speed of coal dispersion on the guide filter plate and reducing the probability of coal accumulation on the guide filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the frame and the shielding frame of the present invention;

[0030] Figure 3 It is a sectional view of the three-dimensional structure of the support frame and the blanking shell of the present invention;

[0031] Figure 4 Schematic diagram of the three-dimensional structure of the dispersion plate and the interception plate of the present invention;

[0032] Figure 5 Schematic diagram of the three-dimensional structure of the intercepting plate of the present invention;

[0033] Figure 6 Schematic diagram of the three-dimensional structure of the second frame and the guide filter plate of the present invention;

[0034] Figure 7 Schematic diagram of the three-dimensional structure of the wave trough of the present invention;

[0035] Figure 8 It is a schematic diagram of the three-dimensional structure of the mounting bracket and the threaded rod of the present invention;

[0036] Figure 9 is a sectional view of the three-dimensional structure of the first frame of the present invention;

[0037] Figure 10 This is an exploded view of the three-dimensional structure of the components at the first frame of the present invention.

[0038] Marked in the figure: 1-frame, 2-blocking frame, 3-first filter plate, 4-second filter plate, 5-transfer module, 6-vibration module, 7-support frame, 8-discharging shell, 9-limiting shell, 10-drive motor, 11-extrusion plate, 21-support rod, 22-sliding block, 31-dispersion plate, 41-interception plate, 51-first frame, 52-second frame, 53-guide filter plate, 531-guide part, 54-transition filter plate, 61-wave trough, 71-mounting frame, 72-threaded rod, 73-pushing frame. DETAILED DESCRIPTION

[0039] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0040] Example 1: An intelligent multi-stage coal preparation device for coal mines, combined with Figure 1-Figure 4 As shown, it includes a frame 1, the frame 1 is provided with a shielding frame 2, and a first elastic member is installed between the two, the shielding frame 2 is fixed with a first filter plate 3 and a second filter plate 4, the second filter plate 4 is located below the first filter plate 3, the frame 1 is installed with a transfer module 5, the transfer module 5 is located below the second filter plate 4, the frame 1 is installed with a vibration module 6 for driving the shielding frame 2 to shake, the frame 1 is rotatably connected to a support frame 7, the support frame 7 is slidably connected to a discharge shell 8, the discharge shell 8 is located above the first filter plate 3, the discharge shell 8 is fixed to a limit shell 9, the support frame 7 is installed with a drive motor 10, the output shaft of the drive motor 10 is fixed with an extrusion plate 11, the extrusion plate 11 is used to extrude the limit shell 9 so that the discharge shell 8 slides along the support frame 7, the support frame 7 is provided with a buffer assembly, and the buffer assembly is used to buffer the impact force exerted on the discharge shell 8.

[0041] In the above scheme, it is intended to solve the problem that the discharge pipe of the existing multi-stage coal preparation device will be blocked during the screening of coal. The first elastic part of the shielding frame 2 is a spring, which is used to support the shielding frame 2. The filter holes of the first filter plate 3 are larger than the filter holes of the second filter plate 4. The filter holes on the first filter plate 3 and the second filter plate 4 are not shown in the figure. The transfer module 5 is an existing belt conveyor device, which mainly transports coal with a particle size smaller than the filter hole diameter on the second filter plate 4 to the left side of this device, and two transmission belts are provided on the right side of the frame 1. The two conveyor belts are used to transport the coal on the first filter plate 3 and the coal on the second filter plate 4 in different directions respectively. The discharge shell 8 is a variable diameter shell, and the opening area on the upper side is larger than the opening area on the lower side, which facilitates the coal to enter the discharge shell 8; the cross-section of the limiting shell 9 is U-shaped.

[0042] Combine Figure 1-Figure 4 As shown, the buffer assembly includes: a support rod 21, which is rotatably connected to the side of the support frame 7 away from the extrusion plate 11; a sliding block 22, which is hinged to the side of the support rod 21 away from the support frame 7, and a second elastic member is provided between the sliding block 22 and the frame 1.

[0043] In the above scheme, a method of swinging the support frame 7 is proposed to cushion the falling coal, reduce the impact force on the coal, and ensure the integrity of the coal. In this embodiment, there are two support rods 21, and both are located on the right side of the support frame 7. The sliding block 22 is located on the lower side of the adjacent support rod 21. The second elastic member of the sliding block 22 is a spring, which is used to cushion the impact force of the coal.

[0044] Combine Figure 3-Figure 7 As shown, a dispersion plate 31 is fixed to the lower side of the discharge shell 8, and the dispersion plate 31 is used to guide the material falling in the discharge shell 8, so that the coal in the discharge shell 8 moves to the right and is dispersed onto the first filter plate 3; the upper side of the dispersion plate 31 is provided with a corrugated protrusion with a gradually changing thickness. The corrugated protrusion of the dispersion plate 31 increases the contact area between the coal and the dispersion plate 31, and separates the coal in the discharge shell 8, changes the flow path of the material, so that the material will not be concentrated in a certain area, facilitates the coal on the dispersion plate 31 to be evenly dispersed to the first filter plate 3, and reduces the accumulation of coal on the first filter plate 3.

[0045] Combine Figure 1-Figure 4As shown, the right side of the discharge shell 8 is rotatably connected to the intercepting plate 41, and a third elastic member is provided between the two, which is a torsion spring, used to drive the intercepting plate 41 to deflect clockwise, and the intercepting plate 41 is located above the dispersion plate 31. The intercepting plate 41 is used to block the coal passing through the dispersion plate 31, reduce the speed of the coal moving to the right, and prolong the time for the coal to pass through the first filter plate 3 and the second filter plate 4; the intercepting plate 41 is a corrugated plate, and when the coal squeezes the intercepting plate 41, the intercepting plate 41 will rotate counterclockwise. At this time, the intercepting plate 41 gradually becomes parallel to the horizontal plane, and the crests of the intercepting plate 41 tending to be horizontal correspond one-to-one with the crests of the corrugated protrusions on the dispersion plate 31, and the troughs of the intercepting plate 41 tending to be horizontal correspond one-to-one with the troughs of the corrugated protrusions on the dispersion plate 31. The corrugations of the intercepting plate 41 cooperate with the corrugations of the corrugated protrusions on the dispersion plate 31, so that the material passing between the two is more uniform, and at the same time, the amount of material falling onto the first filter plate 3 is more stable.

[0046] Specific working process: When using this device to screen coal, turn on the transfer module 5, the vibration module 6 and the drive motor 10. The vibration module 6 drives the shielding frame 2 to vibrate (the first elastic member on the shielding frame 2 is compressed or extended according to the vibration of the shielding frame 2), and the shielding frame 2 drives the first filter plate 3 and the second filter plate 4 to vibrate synchronously. The output shaft of the drive motor 10 drives the extrusion plate 11 to rotate, and the extrusion plate 11 squeezes the limit shell 9 to move back and forth. The limit shell 9 drives the discharge shell 8 to move back and forth, and the discharge shell 8 drives the dispersion plate 31 and the interception plate 41 to move synchronously.

[0047] After the discharge shell 8 starts to move back and forth, the operator gradually pours the coal into the discharge shell 8 through the loading and unloading equipment. The coal enters the discharge shell 8 and falls onto the dispersion plate 31. During this process, the discharge shell 8 drives the material inside it to shake back and forth, so that the coal in the discharge shell 8 is in a flowing state, reducing the occurrence of coal blocking the discharge shell 8 and facilitating the coal to fall onto the first filter plate 3.

[0048] In the process of coal falling onto the material shell 8, when large pieces of coal fall or the amount of coal falling is too much, the falling coal squeezes the material shell 8, and the material shell 8 squeezes the two support rods 21 through the support frame 7, and the support rods 21 squeeze the adjacent sliding blocks 22. When the squeezing force of the coal on the material shell 8 is greater than the elastic force of the second elastic member on the sliding block 22, the sliding block 22 slides to the right along the frame 1 and compresses the second elastic member thereon. At this time, the sliding block 22 pulls the adjacent support rod 21 to deflect counterclockwise, and the support rod 21 passes through the support frame 7. The support frame 7 drives the discharge shell 8 to deflect (the support frame 7 rotates relative to the frame 1), buffering the extrusion force of the coal, reducing the impact force of the falling coal on the coal in the discharge shell 8, and reducing the probability that the falling coal will squeeze the coal in the discharge shell 8 tightly, thereby reducing the probability of the compacted coal blocking the discharge shell 8, and at the same time reducing the probability of coal colliding with each other and causing crushing, thereby ensuring the integrity of the coal. When the falling coal returns to normal, the sliding block 22 is reset under the action of the second elastic member thereon, thereby causing the support rod 21 to drive the discharge shell 8 to reset.

[0049] During the forward and backward movement of the dispersion plate 31, the dispersion plate 31 uses the corrugated protrusions thereon to stir and guide the coal, so that the coal on the dispersion plate 31 moves evenly to the right, thereby evenly distributing the coal that falls onto the first filter plate 3, reducing the accumulation of coal on the first filter plate 3, facilitating the dispersion of the coal on the first filter plate 3, and further facilitating the screening of the coal.

[0050] In the process of coal passing through the dispersion plate 31, the coal squeezes the interception plate 41, and the interception plate 41 begins to deflect counterclockwise (the third elastic member on it twists and stores force). The interception plate 41 blocks the passing coal, reducing the movement speed of the coal, preventing the coal from quickly passing through the dispersion plate 31 and falling onto the first filter plate 3, thereby extending the time the coal passes through the first filter plate 3 and allowing the coal to be fully screened. At the same time, the interception plate 41 and the dispersion plate 31 jointly guide the passing coal, thereby controlling the amount of material falling onto the first filter plate 3, further reducing the accumulation of coal on the first filter plate 3, and improving the efficiency of coal screening.

[0051] After the coal passes through the intercepting plate 41, the coal continues to move to the right along the dispersing plate 31 until it falls onto the first filter plate 3. During this process, the vibrating first filter plate 3 and the second filter plate 4 screen the coal. The coal on the first filter plate 3 and the second filter plate 4 slowly moves to the right and falls onto the corresponding conveyor belts. At the same time, the coal passing through the second filter plate 4 falls onto the transfer module 5. In this way, the coal of different particle sizes screened is transported to the corresponding positions through the transfer module 5 and the two conveyor belts.

[0052] After the above-mentioned coal screening is completed, the transfer module 5, the vibration module 6 and the drive motor 10 are turned off, and the interception plate 41 is reset under the action of the third elastic member thereon, and the use of the device is terminated.

[0053] In this embodiment 1, the first filter plate 3 is a complete filter plate; in the following embodiment, the number of first filter plates 3 is two, distributed on the left and right, and the transition filter plate 54 and the two guide filter plates 53 are both located between the two first filter plates 3, and the two guide filter plates 53 are respectively fitted with the adjacent first filter plates 3.

[0054] Example 2: Based on the structure of Example 1, in order to further optimize the screening effect, this example adds an auxiliary screening mechanism, the specific structure is as follows, combined with Figure 2 、 Figure 3 and Figures 6-10 As shown, it also includes: an auxiliary screening mechanism, which is arranged on the shielding frame 2 and is used to change the vibration mode of the material in the shielding frame 2. The auxiliary screening mechanism includes: a first frame 51, which is fixed to the shielding frame 2; a second frame 52, which has two, both of which are slidably connected to the shielding frame 2, a fourth elastic member is provided between the second frame 52 and the shielding frame 2, the two second frames 52 are slidably connected to the first frame 51, and a fifth elastic member is provided between the second frame 52 and the first frame 51. The two second frames 52 are respectively located on both sides of the first frame 51, and a guide filter plate 53 is fixed in the second frame 52, and the two guide filter plates 53 are both fitted with the first filter plate 3; a transition filter plate 54, which is fixed to the first frame 51 and is located between the two guide filter plates 53; a guide portion 531 is provided on both sides of the guide filter plate 53 for guiding the material; the first frame 51 and the shielding frame 2 are both provided with a plurality of wave grooves 61, and the second frame 52 slides in adjacent wave grooves 61.

[0055] In the above scheme, it is proposed to change the vibration mode of the coal on the first filter plate 3 and the second filter plate 4 to facilitate the coal to pass through the first filter plate 3 and the second filter plate 4, thereby improving the screening efficiency; the fourth elastic member and the fifth elastic member on the second frame 52 are both springs, which are used to drive the second frame 52 to reset, and the outer side of the left guide filter plate 53 is in contact with the first filter plate 3. The guide filter plate 53 is provided with filter holes, and the aperture of the filter holes on the guide filter plate 53 is consistent with the aperture of the filter holes on the first filter plate 3. The filter holes of the guide filter plate 53 and the transition filter plate 54 are not shown in the figure; the transition filter plate 54 is located on the lower side of the left guide filter plate 53, and the transition filter plate 54 is located on the upper side of the right guide filter plate 53. The outer side of the right guide filter plate 53 is in contact with the first filter plate 3 to ensure sufficient screening of the coal; convex balls are provided on both sides of the second frame 52, and the second frame 52 slides on the adjacent wave groove 61 through the convex balls thereon.

[0056] Specific work flow: During the vibration of the shielding frame 2, the vibration module 6 drives the shielding frame 2 to vibrate circumferentially (in the up and down and left and right directions), the shielding frame 2 drives the first frame 51 to vibrate synchronously, the shielding frame 2 and the first frame 51 jointly drive the two second frames 52 to vibrate, the first frame 51 drives the transition filter plate 54 to vibrate, and the second frame 52 drives the guide filter plate 53 thereon to vibrate. After the coal is separated from the dispersion plate 31, the coal falls onto the guide filter plate 53 on the left. The coal is screened in the process of passing through the transition filter plate 54 and the two guide filter plates 53. Part of the coal moves to the right, and the other part of the coal falls onto the second filter plate 4. The screening process of Example 1 is repeated to screen the coal.

[0057] When the coal passes through the left guide filter plate 53, the guide part 531 of the left guide filter plate 53 gathers the coal passing through, so that the dispersion range of the coal is reduced and the distribution state of the coal during the movement is changed. After passing through the left guide filter plate 53, the coal is no longer gathered, so that the dispersion range of the coal is increased and the coal is gradually dispersed. The above action is repeated in the process of passing through the right guide part 531. By repeatedly gathering and dispersing the coal, the distribution position of the coal is changed, and the distribution of the coal is made more chaotic, thereby facilitating the screening of the coal.

[0058] During the vibration of the second frame 52, the second frame 52, the shielding frame 2 and the first frame 51 will all move relative to each other (the fourth elastic member and the fifth elastic member on the second frame 52 are repeatedly compressed and stretched). The second frame 52 moves along the adjacent wave groove 61 through the convex balls thereon. The wave groove 61 guides the adjacent convex balls, so that the convex balls drive the adjacent second frame 52 to move back and forth. The convex balls of the second frame 52 slide along the wave groove 61, causing the second frame 52 to vibrate in the front-to-back direction, thereby increasing the front-to-back vibration of the second frame 52 on the basis of the circumferential vibration, so that the second frame 52 drives the coal to fully vibrate through the guide filter plate 53 thereon, thereby increasing the speed of coal dispersion on the guide filter plate 53 and further reducing the probability of coal accumulation on the guide filter plate 53.

[0059] After the device is used, the shielding frame 2 stops rotating, and the second frame 52 is reset under the action of the fourth elastic member and the fifth elastic member thereon.

[0060] Due to differences in the physical properties of coal (such as brittleness), when coal with higher brittleness is subjected to excessive vibration, it will break into small pieces or powder, thereby reducing the integrity of the coal and affecting subsequent processing or use.

[0061] Example 3: Based on Example 2, combined Figure 1-Figure 3 、 Figure 6 and Figures 8-10As shown, it also includes: a regulating mechanism, which is arranged on the first frame 51 and is used to control the moving stroke of the two second frames 52. The regulating mechanism includes: a mounting frame 71, which is fixed to the first frame 51; a threaded rod 72, which has two, which are rotatably connected to the left and right sides of the mounting frame 71 respectively, and the threaded rod 72 is threadedly connected to a pushing frame 73, which is slidably connected to the mounting frame 71, and the pushing frame 73 is used to limit the adjacent second frame 52; a hand wheel is provided at the top of the threaded rod 72 for easy operation; slide grooves are provided on the left and right sides of the mounting frame 71, and the pushing frame 73 slides in the adjacent slide grooves; when using this device to screen coal, the positions of the two threaded rods 72 must be adjusted according to the brittleness of the coal. First, the two threaded rods 72 are rotated, and the threaded rods 72 drive the adjacent pushing frames 73 through the threads. The movable frame 73 moves, and the distance between the pushing frame 73 and the second frame 52 gradually changes (the higher the brittleness of the coal, the smaller the distance between the pushing frame 73 and the second frame 52; the lower the brittleness of the coal, the larger the distance between the pushing frame 73 and the second frame 52) until the pushing frame 73 is adjusted to an appropriate position (the appropriate position means that the distance between the pushing frame 73 and the second frame 52 matches the brittleness of the coal), and then the threaded rod 72 is stopped from rotating, and the pushing frame 73 stops moving. In the process of the convex ball on the second frame 52 sliding along the adjacent wave groove 61 of the above-mentioned embodiment 2, when the second frame 52 contacts the pushing frame 73, the second frame 52 will stop moving upward, thereby changing the vibration amplitude of the second frame 52, thereby adjusting the vibration force applied to the coal according to the properties of the coal to ensure the integrity of the coal.

[0062] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. An intelligent multi-stage coal separation device for coal mines, comprising a frame (1), the frame (1) being provided with a shielding frame (2), and a first elastic member being installed between the shielding frame (2), a first filter plate (3) and a second filter plate (4) being fixedly connected in the shielding frame (2), the second filter plate (4) being located below the first filter plate (3), the frame (1) being provided with a transfer module (5), the transfer module (5) being located below the second filter plate (4), the frame (1) being provided with a vibration module (6) for driving the shielding frame (2) to shake, and characterized in that: It also includes: a support frame (7), the support frame (7) is rotatably connected to the frame (1), the support frame (7) is slidably connected to a discharge shell (8), the discharge shell (8) is located above the first filter plate (3), the discharge shell (8) is fixedly connected to a limit shell (9), the support frame (7) is installed with a drive motor (10), the output shaft of the drive motor (10) is fixedly connected to an extrusion plate (11), the extrusion plate (11) is used to extrude the limit shell (9) so that the discharge shell (8) slides along the support frame (7), and the support frame (7) is provided with a buffer component, and the buffer component is used to buffer the impact force on the discharge shell (8); The buffer component includes: A support rod (21) is rotatably connected to a side of the support frame (7) away from the extrusion plate (11); A sliding block (22) is hinged to a side of the support rod (21) away from the support frame (7), and a second elastic member is provided between the sliding block (22) and the frame (1); Also included are: An auxiliary screening mechanism is provided on the shielding frame (2) and is used to change the vibration mode of the material on the shielding frame (2). The auxiliary screening mechanism includes: A first frame (51) is fixedly connected to the shielding frame (2); The second frame (52) has two members, both of which are slidably connected to the shielding frame (2), a fourth elastic member is provided between the second frame (52) and the shielding frame (2), the two second frames (52) are slidably connected to the first frame (51), a fifth elastic member is provided between the second frame (52) and the first frame (51), the two second frames (52) are respectively located on both sides of the first frame (51), a guide filter plate (53) is fixedly connected to the second frame (52), and the two guide filter plates (53) are both in contact with the first filter plate (3); a transition filter plate (54) fixedly connected to the first frame (51) and located between the two guide filter plates (53); Also included are: A regulating mechanism is provided on the first frame (51) and is used to control the movement stroke of the two second frames (52), and the regulating mechanism includes: A mounting frame (71) fixedly connected to the first frame (51); The threaded rod (72) has two threads, which are rotatably connected to the two sides of the mounting frame (71). The threaded rod (72) is threadedly connected to a push frame (73). The push frame (73) is slidably connected to the mounting frame (71). The push frame (73) is used to limit the adjacent second frame (52).

2. The intelligent multi-stage coal separation device for coal mines according to claim 1, characterized in that: A dispersion plate (31) is fixedly connected to the lower side of the discharge shell (8), and the dispersion plate (31) is used to guide the material falling in the discharge shell (8).

3. The intelligent multi-stage coal separation device for coal mines according to claim 2, characterized in that: The upper side of the dispersion plate (31) is provided with corrugated protrusions with gradually varying thickness.

4. The intelligent multi-stage coal separation device for coal mines according to claim 3, characterized in that: The side of the discharge shell (8) close to the dispersion plate (31) is rotatably connected to an interception plate (41), and a third elastic member is provided between the two. The interception plate (41) is located above the dispersion plate (31).

5. The intelligent multi-stage coal separation device for coal mines according to claim 4, characterized in that: The intercepting plate (41) is a corrugated plate, and the crests of the intercepting plate (41) correspond one-to-one to the crests of the corrugated protrusions on the dispersing plate (31), and the troughs of the intercepting plate (41) correspond one-to-one to the troughs of the corrugated protrusions on the dispersing plate (31).

6. The intelligent multi-stage coal separation device for coal mines according to claim 5, characterized in that: Both sides of the guide filter plate (53) are provided with guide portions (531) for guiding the material.

7. An intelligent multi-stage coal separation device for coal mines according to claim 6, characterized in that: The first frame (51) and the shielding frame (2) are both provided with a plurality of wave grooves (61), and the second frame (52) is located in adjacent wave grooves (61) and slides.

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