Intelligent mica sheet screening device and system based on multi-stage vibration

Abstract

The invention relates to the technical field of solid screening, in particular to an intelligent mica sheet screening device and system based on multi-stage vibration, the device adopts a multi-stage screening mechanism to ensure that mica sheets are graded according to particle sizes, and a cleaning mechanism is beneficial to realizing automatic cleaning of a screen; materials on the sieve plate are automatically cleaned and collected after screening is finished, and the screening efficiency is improved; the feedback adjusting mechanism can improve the screening efficiency of the screening plate corresponding to each layer. According to the system, by monitoring the weight of materials on each screen plate in the screening process in real time, analyzing the mass of the materials in different levels and combining the change characteristics of the mass of the materials in the screening process, the adjustment requirements of screening boxes in different levels for the vibration amplitude are obtained, and the vertical vibration amplitude is adjusted; by means of the operation, the influence of materials staying on all the screen plates on the actual passing efficiency in the screening process is avoided, the accuracy of vibration amplitude adjustment is improved, and the screening efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid screening, and particularly to an intelligent screening device and system for mica flakes based on multi-stage vibration. Background Art

[0002] As an important industrial raw material, the screening and grading of mica flakes are key links in the production process, which directly affect product quality and production efficiency. However, the existing screening devices have the following defects that need to be solved urgently: Defect of single vibration mode: The existing equipment generally adopts a single vibration mode with fixed parameters, and its vibration amplitude needs to be preset manually. In the actual production process, when facing mica raw materials with different particle size distributions, for raw materials with uneven particle size distributions, fixed vibration parameters cannot achieve dynamic adaptation, resulting in insufficient passing rate of fine particles or over-grinding of coarse particles.

[0003] Defect of low cleaning and maintenance efficiency: For the accumulation of materials, it relies on manual disassembly and cleaning, which increases the idle time of the screening device and reduces the daily screening efficiency.

[0004] Defect of amplitude adjustment error: Using vertical vibration can reduce material accumulation to a certain extent. However, as the screening process progresses, there is a certain probability that materials that could originally pass through the sieve layer stay in the layer. At this time, if the vertical vibration amplitude is directly adjusted according to the material weight obtained from the sieve plate, it may lead to large vibration errors, thereby reducing the screening efficiency.

[0005] Defect of contradiction between dynamic adjustment and equipment loss: There is a certain probability that materials stay in the corresponding screening box at a certain level during the screening process. Therefore, if continuous amplitude adjustment is carried out, it is easy to increase equipment loss and reduce the service life. Summary of the Invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide an intelligent screening device and system for mica flakes based on multi-stage vibration, and the specific technical solutions adopted are as follows: An embodiment of the present invention provides an intelligent screening device for mica flakes based on multi-stage vibration. The screening device includes a screening device body. The screening device further includes a feeding and discharging mechanism, a multi-stage screening mechanism, a cleaning mechanism, and a feedback adjustment mechanism. Each of the mechanisms is installed on the screening device body. The feeding and discharging mechanism enables materials to enter or exit the screening device. The multi-stage screening mechanism is used for screening materials with different particle sizes. The cleaning mechanism is used for cleaning the materials on the sieve plate 9. The feedback adjustment mechanism is used for adjusting the vibration amplitude of the screening box 3 at each target level in real time; The feedback adjustment mechanism includes a weight sensor 19 installed at the end of each sieve plate 9, a central processing unit and a control panel 17 located on one side of the screening device. The signal output end of the weight sensor 19 is connected to the signal input end of the central processing unit and the control panel 17; The weight sensor 19 is used to collect the material weight data of the sieve plate 9 from the start time of the screening device to the current time. The central processing unit and the control panel 17 are used to determine the actual material weight of each screening box 3 at each target time according to the received material weight data of each sieve plate 9 at each target level, combined with the gravity coefficient and the vertical vibration frequency. Wherein, the target time is the time corresponding to the maximum point, and the target level is the second level or the third level; according to the actual material weight at each target time, determine the vibration amplitude adjustment coefficient at the current time; use the vibration amplitude adjustment coefficient to judge whether to adjust the vibration amplitude at the current time, if so, use the vibration amplitude adjustment coefficient to adjust the vibration amplitude at the current time to obtain the vibration amplitude at the next time of the current time.

[0007] Furthermore, the feeding and discharging mechanism includes a feeding component, a discharging component and a collecting tank 11; The feeding component is used to feed materials into the screening device. The feeding component includes a feeding trough 2 and a dust-proof port 13. The feeding trough 2 is placed at the top of the screening device, and the dust-proof port 13 is located between the feeding trough 2 and the screening device. After adding a batch of materials, the dust-proof port 13 is closed to prevent mica dust from escaping; The discharging component is used to discharge materials from the screening device. The discharging component includes a guiding plate 5 and a discharging port 10. The guiding plate 5 is connected to an external collecting mechanism, and the guiding plate 5 is used to guide materials into the external collecting mechanism. The discharging port 10 is located on one side of each screening box 3. During the screening process, the discharging port 10 is in a closed state. When the sieve plate 9 needs to be cleaned after the screening is completed, the discharging port 10 is opened; The collecting tank 11 is placed at the bottom of the screening device and above the servo motor 16. The collecting tank 11 moves in a push-pull manner in the horizontal direction and is used to collect materials after multi-stage screening.

[0008] Furthermore, the multi-stage screening mechanism includes a driving motor 1, a screening box 3, a sieve plate 9, a swinging component 12, a transmission rod 14, a driving component 15, a servo motor 16 and a horizontal vibration device 18; The driving motor 1 is connected to the swinging component 12, and the driving motor 1 provides power for the operation of the swinging component 12; The sieve plate 9 is placed at the bottom of the screening box 3. The aperture diameter of the sieve plate 9 in the upper layer is larger than that of the sieve plate 9 in the middle layer, and the aperture diameter of the sieve plate 9 in the middle layer is larger than that of the sieve plate 9 in the lower layer. Each screening box 3 in each layer of the screening device has a set inclination angle to prevent material stacking. The swing assembly 12 is used to swing the screening box 3 in the upper layer, and the swing assembly 12 is installed on both sides of the screening box 3 in the upper layer. The horizontal vibration device 18 is placed on the sides of the screening boxes 3 in the middle and lower layers to generate horizontal vibrations with a set frequency and amplitude, causing the screening boxes 3 to vibrate back and forth in the horizontal direction. The servo motor 16 is installed at the bottom of the screening device, causing the drive assembly 15 to generate vertical vibrations, which are transmitted to the screening box 3 through the transmission rod 14. For the screening boxes 3 in the middle and lower layers, the transmission rods 14 on the opposite sides are responsible for transmitting vibrations and fixing them respectively. The vertical vibration frequencies and amplitudes received by the screening boxes 3 in the middle and lower layers are the same.

[0009] Further, the swing assembly 12 includes a dial 121, a lever 122, a connecting seat 123, an optical axis 124, a connecting shaft 125, and a guide post 126. The operation process of the swing assembly 12 includes: Power is provided by the drive motor 1, causing the dial 121 to rotate counterclockwise. The dial 121 is connected to the lever 122 through the guide post 126 and drives the lever 122 to move up and down. The other end of the lever 122 is connected to the connecting seat 123 through the connecting shaft 125. The connecting seat 123 is fixed on one side of the screening box 3. The connecting shaft 125 is driven to rotate by the lever 122. When the lever 122 moves, the connecting seat 123 moves up and down along the optical axis 124. When the guide post 126 on the dial 121 rotates one full circle, the connecting seat 123 moves back and forth correspondingly along the optical axis 124. The diameters of the dials 121 of the two groups of swing assemblies 12 on the same side of the screening device are the same, so that the relative positions of the guide posts 126 on the dial 121 are always at the positions with the farthest linear distance during the movement process, so that the central position of the screening box 3 in the upper layer remains at a fixed height, while the heights on both sides change periodically.

[0010] Further, the cleaning mechanism includes a baffle 4, fixed sliders 6, a flexible brush 7, and a slide rail 8; the baffle 4 is perpendicular to the sieve plate 9 and is fixed by the fixed sliders 6 on both sides; the flexible brush 7 is installed at the bottom of the baffle 4; the inclination angle of the baffle 4 is adjusted through the connecting shaft of the fixed slider 6; on each level of the screening box 3, the slide rail 8 parallel to the sieve plate 9 is installed; During the screening process, the fixed slider 6 is at the end of the corresponding screening box 3, and the baffle 4 is in contact with the wall of the screening box; After the screening is completed, the operation process of the cleaning mechanism includes: the fixed slider 6 drives the baffle 4 to move towards the side with the discharge port 10, the baffle 4 is used to apply a lateral force to move the material, and the flexible brush 7 cleans the material particles to assist the material particles to pass through the sieve or through the discharge port 10; when the fixed slider 6 moves to the position of the discharge port 10, the fixed slider 6 moves towards the end for the second cleaning, and the baffle 4 is parallel to the sieve plate 9 during the movement; when the baffle 4 reaches the end, it rotates and makes the plane of the baffle 4 perpendicular to the sieve plate 9.

[0011] An embodiment of the present invention further provides an intelligent mica sheet screening system based on multi-stage vibration, including a memory and a processor, and the processor is used to process the instructions stored in the memory to implement the following process: From the start time of the screening device to the current time, obtain the material weight data of the sieve plate of each target level at each target time; wherein, the target time is the time corresponding to the maximum value point; the target level is the second level or the third level; According to the material weight data at each target time, combined with the gravity coefficient and the vertical vibration frequency, determine the actual material weight of the screening box of each target level at each target time; According to the actual material weight at each target time, determine the vibration amplitude adjustment coefficient at the current time; Use the vibration amplitude adjustment coefficient to judge whether to adjust the vibration amplitude at the current time; If it is adjusted, use the vibration amplitude adjustment coefficient to adjust the vibration amplitude at the current time to obtain the vibration amplitude at the next time of the current time.

[0012] Further, the determining the actual material weight of the screening box of each target level at each target time according to the material weight data at each target time, combined with the gravity coefficient and the vertical vibration frequency, includes: For any screening box of a target level and any target time, use the vertical vibration frequency as the acceleration of the screening box; Calculate the value after adding the acceleration and the gravity coefficient; use the ratio of the material weight data at the target moment to the added value as the actual material weight at the target moment.

[0013] Further, determining the vibration amplitude adjustment coefficient at the current moment according to the actual material weight at each target moment includes: For the screening box at the current level, obtain a preset number of target moments adjacent to the current moment, and form the current time period with each target moment adjacent to the current moment; According to the actual material weight at each target moment within the current time period, analyze the change in the actual weight difference between adjacent target moments, and determine the adjustment requirement index for vertical vibration of the screening box at the current level at the current moment; Obtain the sieve plate aperture value of the screening box at the current level, and determine the simulated volume of the material passing through the screening box at the current level through the sieve plate aperture value; According to the simulated volume of the material passing through, combined with the actual material weight of the screening box at the current level at the current moment, determine the screening efficiency index of the screening box at the current level at the current moment; Combine the adjustment requirement index and the screening efficiency index corresponding to each target level of the screening box at the current moment to determine the vibration amplitude adjustment coefficient at the current moment.

[0014] Further, analyzing the change in the actual weight difference between adjacent target moments according to the actual material weight at each target moment within the current time period, and determining the adjustment requirement index for vertical vibration of the screening box at the current level at the current moment includes: Calculate the difference in the actual material weight between the previous target moment and the next target moment within the current time period to obtain each actual material weight difference; Determine the average value and variance value of all the actual material weight differences, and determine the adjustment requirement index for vertical vibration of the screening box at the current level at the current moment according to the average value and variance value.

[0015] Further, using the vibration amplitude adjustment coefficient to determine whether to adjust the vibration amplitude at the current moment includes: Determine the vibration amplitude adjustment system as the adjustment determination index, and set the adjustment determination threshold; If the adjustment determination index at the current moment is greater than the adjustment determination threshold, adjust the vibration amplitude at the current moment; if the adjustment determination index at the current moment is less than or equal to the adjustment determination threshold, do not adjust the vibration amplitude at the current moment.

[0016] The present invention has the following beneficial effects: The present invention provides an intelligent screening device and system for mica sheets based on multi-stage vibration. The device includes a feeding and discharging mechanism, a multi-stage screening mechanism, a cleaning mechanism, and a feedback adjustment mechanism. Each mechanism is installed on the main body of the screening device. The feeding and discharging mechanism enables materials to enter or exit the screening device. The multi-stage screening mechanism is used to screen materials of different particle sizes. The cleaning mechanism is used to clean the materials on the sieve plate. The feedback adjustment mechanism is used to adjust the vibration amplitude of the screening boxes at each target level in real time. The use of the multi-stage screening mechanism can ensure the classification of mica sheets by particle size. Through the cleaning mechanism, automatic cleaning of the sieve mesh is achieved, so that the materials on the sieve plate are automatically cleaned and collected after screening, reducing the long gap caused by manual disassembly and cleaning, and improving the screening efficiency. The feedback adjustment mechanism can effectively improve the screening efficiency of the sieve plates corresponding to each level.

[0017] The system monitors the weight of the materials on each sieve plate in real time during the screening process. By analyzing the size of the material quality in different levels and combining the change characteristics of the material quality during the screening process, the adjustment requirements for the vibration amplitude of the screening boxes at different levels are obtained, and thus the vertical vibration amplitude is adjusted. This operation avoids the influence of the materials staying on each sieve plate on the actual passing efficiency during the screening process, improves the accuracy of vibration amplitude adjustment, and at the same time improves the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the outer surface of the housing of an intelligent screening device for mica sheets based on multi-stage vibration according to an embodiment of the present invention Figure 1 ; Figure 2 Schematic diagram of the outer surface of the housing of an intelligent screening device for mica sheets based on multi-stage vibration according to an embodiment of the present invention Figure 2 ; Figure 3 Schematic diagram of the internal structure of an intelligent screening device for mica sheets based on multi-stage vibration according to an embodiment of the present invention Figure 1 ; Figure 4 Schematic diagram of the internal structure of an intelligent screening device for mica sheets based on multi-stage vibration according to an embodiment of the present invention Figure 2 ; Figure 5 Detailed structural schematic diagram C of the feeding component of an intelligent screening device for mica sheets based on multi-stage vibration according to an embodiment of the present invention; Figure 6 Schematic diagram D of the detailed structure of the discharge component of an intelligent screening device for mica sheets based on multi-stage vibration according to an embodiment of the present invention; Figure 7 Schematic diagram A of the detailed structure of the swing component 12 of an intelligent screening device for mica sheets based on multi-stage vibration according to an embodiment of the present invention; Figure 8 Schematic diagram B of the detailed structure of the cleaning mechanism of an intelligent screening device for mica sheets based on multi-stage vibration according to an embodiment of the present invention; Figure 9 Execution flow chart of an intelligent screening system for mica sheets based on multi-stage vibration according to an embodiment of the present invention; The reference numerals are as follows: 1 is a driving motor, 2 is a feeding trough, 3 is a screening box, 4 is a baffle, 5 is a guiding plate, 6 is a fixed slider, 7 is a flexible brush, 8 is a slide rail, 9 is a sieve plate, 10 is a discharge port, 11 is a collecting trough, 12 is a swing component, 121 is a dial, 122 is a dial rod, 123 is a connecting seat, 124 is a smooth shaft, 125 is a connecting shaft, 126 is a guiding column, 13 is a dust-proof port, 14 is a transmission rod, 15 is a driving component, 16 is a servo motor, 17 is a central processing unit and a control panel, 18 is a horizontal vibration device, 19 is a weight sensor. Detailed implementation manners

[0020] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and effects of the technical solutions proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs.

[0022] An embodiment of the present invention provides an intelligent screening device for mica sheets based on multi-stage vibration. The screening device, in addition to including the screening device body, which is the basic screening equipment herein, further includes a feeding and discharging mechanism, a multi-stage screening mechanism, a cleaning mechanism and a feedback adjustment mechanism with certain advantages, and all the mechanisms are installed on the screening device body. Among them, the feeding and discharging mechanism is used to make materials enter or exit the screening device, the multi-stage screening mechanism is used to screen materials with different particle sizes, the cleaning mechanism is used to clean the materials on the sieve plate 9, and the feedback adjustment mechanism is used to adjust the vibration amplitude of each screening box 3 at the target level in real time.

[0023] Schematic diagram of the outer shell surface of the screening device in this embodiment Figure 1 As Figure 1 shown, the schematic diagram of the outer shell surface Figure 2 As Figure 2 shown, the schematic diagram of the internal structure Figure 1 As Figure 3 shown, the schematic diagram of the internal structure Figure 2 As Figure 4 shown, for each mechanism corresponding to the screening device, including: First, the feeding and discharging mechanism. The feeding and discharging mechanism includes a feeding component, a discharging component and a collecting tank 11.

[0024] First of all, for the feeding component, which is used to make the material enter the screening device, including a feeding trough 2 and a dust-proof port 13. The detailed structural schematic diagram C of the feeding component is as Figure 5 shown.

[0025] The feeding trough 2 is placed at the top of the screening device and can be connected to other automatic feeding equipment to achieve closed-loop automatic control.

[0026] Since the mica flakes have already undergone a crushing operation, there are small particles in the mica flakes added through the feeding trough 2. During the screening process, the particles may float in the air. Therefore, a component dust-proof port 13 is added to the feeding component. The dust-proof port 13 is located between the feeding trough 2 and the screening device. When adding a certain amount of crushed mica flakes, it can move horizontally to make the material enter the screening device. After adding the material, it moves along the horizontal direction. After completing the addition of a batch of materials, the dust-proof port 13 is closed to prevent the mica flake dust from escaping.

[0027] Secondly, for the discharging component, which is used to discharge the material from the screening device, including a guiding plate 5 and a discharging port 10. The detailed structural schematic diagram D of the discharging component is as Figure 6 shown.

[0028] The guiding plate 5 is connected to an external collecting mechanism, and its surface is smooth, which is used to guide the material into the external collecting mechanism.

[0029] The discharging port 10 is located on one side of each level of screening box 3. During the screening process, the discharging port 10 is in a closed state. When the screening plate 9 needs to be cleaned after the screening is over, the discharging port 10 is opened so that the large-particle materials are discharged through the discharging port.

[0030] Finally, for the collecting tank 11, it is placed at the bottom of the screening device and above the servo motor 16. The collecting tank 11 moves in a horizontal push-pull manner, which is convenient for the staff to collect the materials.

[0031] The collection tank 11 is used to collect the materials after multi-stage screening. Specifically, when the mica flakes pass through multi-stage screening, the materials with a particle size larger than the corresponding aperture of the sieve plate 9 will remain in the corresponding screening box 3, and the materials with a smaller particle size will fall into the collection tank 11 after three-stage screening.

[0032] It should be noted that the feeding and discharging mechanism in this embodiment can effectively prevent the extremely fine particles from dispersing in the space during the screening process by adding the dust-proof port 13, that is, reducing the dust emission during the screening process.

[0033] Second, the multi-stage screening mechanism. The multi-stage screening mechanism includes a driving motor 1, a screening box 3, a sieve plate 9, a swing assembly 12, a transmission rod 14, a driving assembly 15, a servo motor 16, and a horizontal vibration device 18.

[0034] It should be noted that after the mica flakes are broken, there are blocky particles with different particle sizes. Using a single-aperture sieve mesh or sieve plate alone is likely to result in the final screened material particles being too large, leading to material waste and low efficiency in the entire screening process. Therefore, to avoid the above problems, there are three levels of screening processes in the screening device of this embodiment, that is, there are 3 screening boxes 3.

[0035] First, for the driving motor 1, it is connected to the swing assembly 12, and the driving motor 1 provides power for the operation of the swing assembly 12.

[0036] Secondly, for the screening box 3, the screening box at the top layer of the screening device is the first-level screening box, the screening box in the middle layer is the second-level screening box, and the screening box at the bottom layer is the third-level screening box. And, the sieve plate 9 is placed at the bottom of the screening box 3, the aperture of the sieve plate 9 in the upper layer is larger than the aperture of the sieve plate 9 in the middle layer, and the aperture of the sieve plate 9 in the middle layer is larger than the aperture of the sieve plate 9 in the lower layer.

[0037] Since the multi-stage screening assembly will block the materials larger than the aperture of the sieve plate 9, the materials accumulate on the corresponding sieve plate 9, resulting in the blockage of the sieve mesh and sieve plate. For materials with a larger volume, their mass is larger, and the displacement generated by horizontal vibration is smaller. Especially when the materials themselves have different shapes after being broken, there are single materials with a larger volume or multiple materials with a medium volume stacked together, resulting in the blockage of the aperture of the sieve plate 9. In common screening devices, it is necessary to clean by manual disassembly, which reduces the screening efficiency.

[0038] In this embodiment, for the first-stage screening box 3, a large-amplitude swing component is adopted to improve the passing rate and reduce the probability of blockage; for each stage of the screening box 3, each stage of the screening box 3 can have a certain inclination angle, and the value range of the inclination angle can be from 5° to 10°, which can make the material more easily affected by vibration during the screening process to make it tumble, improve the screening efficiency, and facilitate the subsequent collection and cleaning of the material on the surface of the sieve plate 9.

[0039] The swing of the first-stage screening box 3 is specifically realized by the swing component 12. The swing component 12 is installed on both sides of the first-stage screening box 3. The detailed structural schematic diagram A of the swing component 12 is as Figure 7 shown. The swing component 12 includes a dial 121, a lever 122, a connecting seat 123, a smooth shaft 124, a connecting shaft 125, and a guide post 126. Among them, the operation process of the swing component 12 includes: Power is provided by the driving motor 1 to make the dial 121 rotate counterclockwise. The dial 121 is connected to the lever 122 through the guide post 126 and drives the lever 122 to move up and down. The other end of the lever 122 is connected to the connecting seat 123 through the connecting shaft 125. The connecting seat 123 is fixed on one side of the screening box), and the connecting shaft 125 is driven by the lever 122 to rotate. When the lever 122 moves, the connecting seat 123 moves up and down along the smooth shaft 124; when the guide post 126 on the dial 121 rotates one full circle, the connecting seat 123 moves back and forth along the smooth shaft 124 correspondingly.

[0040] Similarly, the same swing component 12 is installed on the opposite side of the first-stage screening box 3, so there are a total of 4 groups of swing components. For the two groups of swing components 12 on the same side of the screening device, the diameters of the dials 121 are the same, so that the relative positions of the guide posts 126 on the dials 121 are always at the positions with the farthest straight-line distance during the movement process, so that the central position of the first-stage screening box 3 remains at a fixed height, while the heights on both sides change periodically; when the first-stage screening box 3 swings back and forth, the large-volume materials on the sieve plate 9 can roll back and forth to adjust the screening posture, while the small-volume materials directly pass through the sieve and fall into the second-stage screening box 3.

[0041] For the second-stage and third-stage screening boxes 3, on the basis of having a certain inclination angle, since the volume and mass of the materials staying on the sieve plate 9 are relatively small, theoretically, a larger-amplitude vibration should be adopted to make the smaller-particle-size materials pass through the gaps between the larger-particle-size materials and pass through the sieve, but using the above swing component 12 will not be able to provide a high-frequency vibration due to equipment loss problems.

[0042] Thus, for the screening boxes 3 of the second and third levels, a horizontal vibration device 18 is installed on their sides and fixed to the outside of the screening device through one side of the screening box to prevent it from falling. The horizontal vibration device 18 can generate horizontal vibrations with a certain frequency and amplitude, causing the screening boxes 3 of the second and third levels to vibrate back and forth in the horizontal direction.

[0043] However, the ability of horizontal vibration to adjust the posture of materials with large volume and weight is limited.

[0044] Therefore, a servo motor 16 is installed at the bottom of the screening device to make the driving component 15 generate vertical vibrations, which are transmitted to the screening boxes 3 of the second and third levels through the transmission rod 14. A shock-absorbing mechanism is installed at the connection between the driving component 15 and the screening device to reduce the wear of the structural components. Through the driving component 15, the large-volume materials existing on the screening box 3 can be tumbled to adjust the posture and improve the passing rate of the materials.

[0045] Among them, the screening boxes 3 of the second and third levels are respectively responsible for transmitting vibrations and fixing by two groups of transmission rods 14 on the opposite sides; the vertical vibration frequencies and amplitudes received by the screening boxes 3 of the second and third levels are the same.

[0046] It should be noted that there are differences in the screening methods of the screening boxes of different levels in the multi-level screening mechanism in this embodiment. For the screening box of the first level, a swinging component is used to realize material screening, while for the screening boxes of the second and third levels, a combination of inclination angle, horizontal vibration and vertical vibration is used, which can effectively improve the screening efficiency of the corresponding sieve plates at each level and can overcome the defect of single vibration mode existing in the prior art to a certain extent.

[0047] Third, the cleaning mechanism. The cleaning mechanism includes a baffle 4, fixed sliders 6, a flexible brush 7 and a slide rail 8.

[0048] It should be noted that after a common screening device performs a screening process, it is usually necessary to disassemble the equipment to clean the materials on the sieve plate. The process of manual disassembly and cleaning takes a long time, which reduces the screening efficiency. Therefore, the screening device for screening mica sheet materials in this embodiment has a cleaning mechanism. The detailed structural schematic diagram B of the cleaning mechanism is as Figure 8 shown.

[0049] The connection methods of the components of the cleaning mechanism include: the baffle 4 is perpendicular to the sieve plate 9 and fixed by the fixed sliders 6 on both sides; a flexible brush 7 is installed at the bottom of the baffle 4; the inclination angle of the baffle 4 is adjusted through the connecting shaft of the fixed slider 6; on each level of screening box 3, a slide rail 8 parallel to the sieve plate 9 is installed.

[0050] During the screening process, the fixed slider 6 is at the end of the corresponding screening box 3, and the baffle 4 is in contact with the wall of the screening box.

[0051] After the screening is completed, the operation process of the cleaning mechanism includes: the fixed slider 6 drives the baffle 4 to move towards the side with the discharge port 10. The baffle 4 is used to apply a lateral force to move the material, and the flexible brush 7 cleans the material particles to assist the material particles to pass through the sieve or through the discharge port 10; when the fixed slider 6 moves to the position of the discharge port 10, the fixed slider 6 moves towards the end for the second cleaning. During the movement, the baffle 4 rotates so that the plane of the baffle 4 is parallel to the sieve plate 9, thus preventing the material from moving in the opposite direction and improving the cleaning efficiency; when the baffle 4 reaches the end, it rotates and makes the plane where the baffle 4 is located perpendicular to the sieve plate 9; at this time, the large-volume materials on the current sieve plate 9 are exported through the guide plate 5, and the small-volume materials accumulated between the large-volume materials can fall and pass through the sieve plate 9, thereby improving the screening efficiency.

[0052] It should be noted that the cleaning mechanism in this embodiment can achieve the purpose of cleaning the materials on the sieve plate without disassembling the equipment, avoiding wasting a long time in the cleaning link and improving the screening efficiency to a certain extent.

[0053] Third, the feedback adjustment mechanism. The feedback adjustment mechanism includes a weight sensor 19 installed at the end of each sieve plate 9, a central processor and a control panel 17 on one side of the screening device. The signal output end of the weight sensor 19 is connected to the signal input end of the central processor and the control panel 17.

[0054] It should be noted that during multi-layer screening, it is easy for the material to cause uneven force on the sieve mesh. Vertical vibration can reduce the material accumulation to a certain extent. And as the screening process progresses, the amount of material staying on the sieve plates of each target level is in a changing process. Therefore, it is necessary to adjust the vibration amplitude corresponding to different levels of screening boxes. Among them, the adjustment of the amplitude of the screening box is also the adjustment of the vibration of the sieve plate.

[0055] First, the weight sensor 19 is used to collect the material weight data of the sieve plate 9 from the start time of the screening device to the current time.

[0056] Secondly, the central processing unit and the control panel 17 are used to determine the actual material weight of the screening box 3 at each target level at each target time according to the material weight data of each target-level sieve plate 9 at each target time received, in combination with the gravity coefficient and the vertical vibration frequency; wherein, the target time is the time corresponding to the maximum point, and the target level is the second level or the third level; according to the actual material weight at each target time, determine the vibration amplitude adjustment coefficient at the current time; use the vibration amplitude adjustment coefficient to judge whether to adjust the vibration amplitude at the current time, and if so, use the vibration amplitude adjustment system to adjust the vibration amplitude at the current time to obtain the vibration amplitude at the next time of the current time.

[0057] In this embodiment, the material weight data collected by the weight sensor 19 can be transmitted to the central processing unit and the control panel 17 through the Internet of Things for analysis and processing, so as to achieve feedback adjustment. In addition, it should be noted that the central processing unit and the control panel 17 can implement various instructions through the operation of the staff.

[0058] The detailed implementation steps of the central processing unit and the control panel 17 for adjusting the vibration amplitude of each target-level screening box in the vertical direction are the same as the implementation steps of the processor in a mica sheet intelligent screening system based on multi-stage vibration described below, that is, the processor of the mica sheet intelligent screening system is the central processing unit in the central processing unit and the control panel 17, and the same implementation steps will not be repeated here.

[0059] Since the weight data collected by the weight sensor is affected by the vibration of the screening box and its weight data is in a state of continuous fluctuation, it will interfere with the material content on each sieve plate during the actual screening process. On the premise that the material weight data is inaccurate, the subsequent feedback control of the vertical vibration is inaccurate.

[0060] Therefore, in order to improve the accuracy of the control of the vibration amplitude in the vertical direction, another embodiment of the present invention provides a mica sheet intelligent screening system based on multi-stage vibration, including a memory and a processor, and the processor is used to process the instructions stored in the memory, as Figure 9 shown, to achieve the following process: S1. From the start time of the screening device to the current time, obtain the material weight data of each target-level sieve plate at each target time.

[0061] Here, the target time is the time corresponding to the maximum point, and the target level is the second level or the third level.

[0062] When the screening box is in the descending state during vertical vibration or the material on the surface of the screening box is in the falling state, the material itself is in a free-fall state, and there is a period of time when the collected weight data is zero. It is not until the downward acceleration of the screening box is less than the gravitational coefficient and it contacts the material that the weight data is collected again. When the screening box is in the ascending state during vertical vibration, it gives an upward thrust to the material, and the collected weight data at this time first increases and then decreases. When the collected weight data reaches a maximum value at a certain moment, it indicates that at the corresponding moment, it is affected by the gravity of the material and the maximum thrust generated during the ascending process of the screening box, and there is the maximum acting force on the weight sensor. Therefore, the weight of the material remaining in the screening box can be judged by analyzing the weight data in each ascending stage, that is, by analyzing the weight data corresponding to the moments of each maximum value point.

[0063] It should be noted that since the vertical vibration frequency is fixed, the time intervals between the maximum value points are the same.

[0064] In this embodiment, according to the movement trajectories of the screening boxes of the second level and the third level, different movement trajectory labels can be assigned to the corresponding weight sensors at different time periods, so as to determine the material weight data corresponding to the moments of each maximum value point from the start time of the screening device to the current time.

[0065] S2. According to the material weight data at each target moment, combined with the gravitational coefficient and the vertical vibration frequency, determine the actual material weight of the screening box of each target level at each target moment.

[0066] Here, the material weight data is the weight data directly collected by the weight sensor and affected by the gravitational factor or the acceleration factor, while the actual material weight is the weight data only affected by the actual material weight on the sieve plate of the screening box of the target level. In order to improve the accuracy of adjusting the vertical vibration amplitude based on the material weight, it is necessary to combine the gravitational coefficient and the vertical vibration frequency to determine the actual material weight of the screening box of each target level at each target moment.

[0067] As an exemplary implementation manner, the above step S2 can be implemented through steps S21 to S22: S21. For any screening box of the target level and any target moment, take the vertical vibration frequency as the acceleration of the screening box.

[0068] S22. Calculate the value after adding the acceleration and the gravitational coefficient; take the ratio of the material weight data at the target moment to the added value as the actual material weight at the target moment.

[0069] In this embodiment, according to the physical law, there is an expression for the weight data as follows: ; where F represents the material weight data at the target moment, a represents the acceleration of the screening box, g represents the gravitational coefficient, and m represents the actual weight of the material at the target moment.

[0070] Given the frequency of vertical vibration, it can be used as the acceleration of the screening box. g is a well-known parameter, and F is the measured weight data. Therefore, by , the actual weight m of the material in the screening box at the current level at the target moment can be obtained.

[0071] Referring to the determination process of the actual weight of the material in any screening box at any target moment at the above-mentioned target level, the actual weight of the material in each screening box at each target moment can be obtained.

[0072] It should be noted that the actual weight of the material determined at this time is the weight data without considering the influence of the gravitational coefficient and acceleration. The gravitational coefficient and acceleration will affect the actual weight data of the material. If these factors are not excluded, the measured weight data may be interfered by external forces, resulting in errors; the adjustment of the vertical vibration amplitude of the sieve plate is to optimize the screening effect. If the adjustment of the vibration amplitude is affected by gravity and acceleration, it may lead to unstable or inconsistent measurement of the vibration amplitude, thus affecting the screening efficiency; the material is affected by vibration during the screening process, and accurate weight data can reflect the characteristics of the material, such as particle size, density, etc.

[0073] Therefore, after excluding the influence of external factors such as gravity and acceleration, the obtained actual weight data is more pure, can accurately reflect the true state of the material, and helps to make more scientific and reasonable adjustments during the screening process, that is, it helps to obtain a vibration amplitude adjustment coefficient with higher numerical accuracy subsequently.

[0074] S3. Determine the vibration amplitude adjustment coefficient at the current moment according to the actual weight of the material at each target moment.

[0075] During the vertical vibration screening process, there is a certain probability that the material can stay on the sieve plate originally. At this time, if the vertical vibration amplitude is directly regulated according to the actual weight of the material at the current moment, the determined vibration error will be relatively large, reducing the screening efficiency of the screening box.

[0076] As an exemplary implementation manner, the above step S3 can be implemented through steps S31 to S35: S31. For the screening box at the current level, obtain a preset number of target moments adjacent to the current moment, and form the current time period with each target moment adjacent to the current moment.

[0077] In this embodiment, as the screening progresses, the total amount of materials larger than the corresponding aperture size staying between each sieve plate tends to balance, and the fluctuation of the material quality obtained at this time gradually decreases. Therefore, for the current moment of real-time acquisition, the actual weights of the materials corresponding to a preset number of maximum value points adjacent to the current moment are obtained. Specifically, the actual weights of the materials at 10 historical target moments adjacent to the current moment are obtained.

[0078] Among them, the preset number can be set to 10, but the implementer can set the size of the preset number according to the specific actual situation, and no specific limitation is made here.

[0079] S32. According to the actual weights of the materials at each target moment within the current time period, analyze the change situation of the actual weight difference between adjacent target moments, and determine the adjustment requirement index for vertical vibration of the screening box at the current level at the current moment.

[0080] Here, the adjustment requirement index refers to the demand situation of the material screening state of the screening box at the current level for the adjustment of the vibration amplitude. The larger the adjustment requirement index, the worse the material screening situation of the screening box at the current level, and the greater the degree of adjustment of the vibration amplitude.

[0081] As an exemplary implementation manner, the above step S32 can be implemented through steps S321 to S322: S321. Calculate the difference in the actual weights of the materials between the previous target moment and the next target moment within the current time period to obtain each difference in the actual weights of the materials.

[0082] In this embodiment, the previous target moment is the earlier time point, and the next target moment is the later time point. Here, taking the actual weight of the material at the previous target moment as the minuend is to analyze the change situation of the material weight on the sieve plate as time progresses.

[0083] S322. Determine the average value and variance value of all the differences in the actual weights of the materials, and determine the adjustment requirement index for vertical vibration of the screening box at the current level at the current moment according to the average value and variance value.

[0084] The larger the variance of the differences in the actual weights of the materials in the current time period, the higher the degree of unstable falling of the materials in the current time period, which further indicates that there are still many small-volume materials that have not passed through the screening box at the current level, and the weight change is more unstable. At this time, the demand for the adjustment of the vibration amplitude is higher.

[0085] The average value of the actual material weight difference in the current period has positive and negative values. When the average value is positive, it indicates that the material in the screening box at the current level in the current period is in a decreasing state. The larger the average value, the more obvious the decreasing trend of the material weight monitored by the weight sensor of the screening box at the current level in the current period, and the less necessary it is to adjust the amplitude of the vertical vibration of the screening box at the current level at the current moment, and the smaller the adjustment demand index; the smaller the average value, the smaller the change in the material weight monitored by the weight sensor of the screening box at the current level in the current period, and there may be blockage. At this time, the more necessary it is to adjust the amplitude of the vertical vibration of the screening box at the current level at the current moment, and the larger the adjustment demand index.

[0086] When the average value is negative, it indicates that the material in the screening box at the current level in the current period is in an increasing state. The larger the absolute value of the average value, the more obvious the increasing trend of the material weight monitored by the weight sensor of the screening box at the current level in the current period, and the more likely it is to have a sieve plate blockage. The more necessary it is to adjust the amplitude of the vertical vibration of the screening box at the current level at the current moment, and the larger the adjustment demand index; on the contrary, the smaller the absolute value of the average value, the less obvious the increasing trend of the material weight monitored by the weight sensor of the screening box at the current level in the current period, and the less necessary it is to adjust the amplitude of the vertical vibration of the screening box at the current level at the current moment, and the smaller the adjustment demand index.

[0087] In this embodiment, by combining two calculation factors related to the vertical vibration adjustment demand to determine the adjustment demand index, the numerical accuracy of the adjustment demand index can be effectively improved.

[0088] As an example, the calculation formula for the adjustment demand index of the screening box of the i-th target level for vertical vibration at the current moment can be: ; where represents the adjustment demand index of the screening box of the i-th target level for vertical vibration at the current moment, represents the average value of all the actual material weight differences of the screening box of the i-th target level in the current period, represents the variance of all the actual material weight differences of the screening box of the i-th target level in the current period.

[0089] It should be noted that The relevant operations of do not consider the influence of dimensions, and only the numerical values can be taken for analysis. In addition, affected by the continuous screening process, generally has no possibility of being zero. When there are extreme cases, is assigned a non-zero constant, such as 0.01.

[0090] The screening boxes of the second and third levels are jointly affected by vibrations of the same frequency and amplitude. However, the screen plate pore sizes corresponding to the screening boxes of different levels are different, and there are differences in the proportion of materials with different volumes of mica flakes contained in different batches added for screening. The material proportion situation cannot be directly obtained. Therefore, if the amplitude adjustment is only based on the adjustment requirement index for vertical vibration, it is likely to cause a decrease in the material passing rate in the third-level screening box, resulting in a decrease in the overall screening efficiency. Therefore, the following steps S33 to S34 are proposed in this embodiment.

[0091] S33. Obtain the screen plate pore size value of the screening box at the current level, and determine the simulated volume of the passing material corresponding to the screening box at the current level through the screen plate pore size value.

[0092] During the vertical screening process, the smaller the pore size of the screen plate, the smaller the required vibration amplitude. Therefore, for each target-level screening box, obtain the screen plate pore size value of the screening box at the current level, and the simulated volume situation of the material can be determined through the screen plate pore size value.

[0093] In this embodiment, since the actual mica flake material is a polyhedron, the cube of the screen plate pore size value can be obtained to simulate the maximum passing volume of the material, which is used as the simulated volume of the passing material.

[0094] S34. Determine the screening efficiency index of the screening box at the current level at the current moment according to the simulated volume of the passing material and in combination with the actual weight of the material in the screening box at the current level at the current moment.

[0095] The greater the mass of the material present in the screening box at the current level, the greater the real-time screening efficiency of the corresponding screening box. Therefore, when quantitatively analyzing the screening efficiency index, it is necessary to combine the actual weight of the material in the screening box at the current level at the current moment.

[0096] As an example, the calculation formula for the screening efficiency index of the i-th target-level screening box at the current moment can be: ; where represents the screening efficiency index of the i-th target-level screening box at the current moment, represents the screen plate pore size value of the i-th target-level screening box, represents the simulated volume of the passing material corresponding to the i-th target-level screening box, represents the actual weight of the material in the i-th target-level screening box at the current moment, is the material weight data without considering the influence of gravity and acceleration.

[0097] In the calculation formula of the screening efficiency index, the smaller the simulated volume of the material, the higher the material passing rate of the screening box at the current level, and the better the screening effect of the screening box. Therefore, the simulated volume of the passing material is negatively correlated with the screening efficiency index; the greater the actual weight of the material, the more material to be screened corresponding to the screening box at the current level, and the higher the screening efficiency of the screening box; on the basis of a smaller screening volume, the more material on the screening box at the current level, the higher the screening efficiency of the screening box at the current level. and The multiplication operation of also does not consider the influence of dimensions, and only the numerical value can be taken for analysis.

[0098] S35. Combine the adjustment requirement index and the screening efficiency index corresponding to each target-level screening box at the current moment to determine the vibration amplitude adjustment coefficient at the current moment.

[0099] In this embodiment, the higher the adjustment requirement index corresponding to the screening box at the current moment, the greater the possibility of adjusting the vertical vibration amplitude of the screening box corresponding to the target level. And the higher the screening efficiency index corresponding to the screening box at the current moment, the smaller the possibility of adjusting the vertical vibration amplitude of the screening box corresponding to the target level. The adjustment requirement index and the screening efficiency index are both dimensionless indexes, which are used to determine the vibration amplitude adjustment coefficient at the current moment.

[0100] As an example, the calculation formula of the vibration amplitude adjustment coefficient at the current moment can be: ; In the formula, represents the vibration amplitude adjustment coefficient at the current moment, n represents the number of target levels, represents the adjustment requirement index for vertical vibration of the screening box of the i-th target level at the current moment, represents the screening efficiency index of the screening box of the i-th target level at the current moment, norm represents the normalization function, which is used to implement the normalization processing of so that the value range of the vibration amplitude adjustment coefficient is limited between 0 and 1.

[0101] S4. Use the vibration amplitude adjustment coefficient to judge whether to adjust the vibration amplitude at the current moment.

[0102] The material has a certain probability of staying in the screening box corresponding to a certain target level during the screening process. If continuous amplitude adjustment is carried out, it is easy to cause an increase in equipment loss and a reduction in equipment life. Therefore, after obtaining the vibration amplitude adjustment coefficient at the current moment, it is judged whether to adjust the vibration amplitude at the current moment based on the vibration amplitude adjustment coefficient.

[0103] Specifically, determine the vibration amplitude adjustment system as the adjustment determination index and set the adjustment determination threshold; if the adjustment determination index at the current moment is greater than the adjustment determination threshold, adjust the vibration amplitude at the current moment; if the adjustment determination index at the current moment is less than or equal to the adjustment determination threshold, do not adjust the vibration amplitude at the current moment.

[0104] In this embodiment, set the adjustment determination threshold to 0.5. When is greater than 0.5, adjust the vibration amplitude at the current moment as the vibration amplitude at the next moment. When is less than or equal to 0.5, do not adjust the vibration amplitude at the current moment, and keep the vibration amplitude at the next moment unchanged as the vibration amplitude at the current moment.

[0105] S5. If adjustment is required, use the vibration amplitude adjustment system to adjust the vibration amplitude at the current moment to obtain the vibration amplitude at the next moment of the current moment.

[0106] In this embodiment, during the process of adjusting the vibration amplitude at the current moment, adjust according to the linear formula to obtain the vibration amplitude at the next moment of the current moment. Specifically: When , represents the average value of the actual weight differences of all the materials in all the screening boxes of all target levels during the current period, indicating that the material weights of the screening boxes of each target level in the current period show a decreasing trend. The vibration amplitude at the current moment should be adjusted downward. The expression for the vibration amplitude at the next moment is: ; In the formula, represents the vibration amplitude at the next moment of the current moment, represents the vibration amplitude at the current moment, represents the vibration amplitude adjustment coefficient at the current moment.

[0107] When , it indicates that the material weights of the screening boxes of each target level in the current period show an increasing trend. The vibration amplitude at the current moment should be adjusted upward. The expression for the vibration amplitude at the next moment is: .

[0108] It should be noted that when the adjustment determination index of the vibration amplitude at the current moment tends to 0, it indicates that the screening process of the screening boxes of each target level has been completed and the weight tends to be stable. Therefore, when the adjustment determination index remains zero continuously within the rated 30 seconds, stop the entire screening device and clean and collect the materials in the screening boxes of each level, thus completing the screening process of mica flakes. After the cleaning is completed, open the dust-proof port and re-add the next batch of materials for screening.

[0109] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. An intelligent screening device for mica sheets based on multi-stage vibration, the screening device comprising a screening device body, characterized in that, The screening device further includes a feeding and discharging mechanism, a multi-stage screening mechanism, a cleaning mechanism and a feedback adjustment mechanism. Each of the mechanisms is installed on the screening device body. The feeding and discharging mechanism is used to allow materials to enter or exit the screening device. The multi-stage screening mechanism is used to screen materials with different particle sizes. The cleaning mechanism is used to clean the materials on the sieve plate (9). The feedback adjustment mechanism is used to adjust the vibration amplitude of the screening boxes (3) at each target level in real time; The feedback adjustment mechanism includes a weight sensor (19) installed at the end of each sieve plate (9), a central processing unit and a control panel (17) located on one side of the screening device. The signal output end of the weight sensor (19) is connected to the signal input end of the central processing unit and the control panel (17); The weight sensor (19) is used to collect the material weight data of the sieve plate (9) from the start time of the screening device to the current time. The central processing unit and the control panel (17) are used to determine the actual material weight of the screening boxes (3) at each target level at each target time according to the received material weight data of the sieve plates (9) at each target level at each target time, in combination with the gravity coefficient and the vertical vibration frequency. Among them, the target time is the time corresponding to the maximum value point, and the target level is the second level or the third level. According to the actual material weight at each target time, determine the vibration amplitude adjustment coefficient at the current time. Use the vibration amplitude adjustment coefficient to determine whether to adjust the vibration amplitude at the current time. If adjustment is required, use the vibration amplitude adjustment coefficient to adjust the vibration amplitude at the current time to obtain the vibration amplitude at the next time of the current time.

2. The intelligent screening device for mica sheets based on multi-level vibration according to claim 1, wherein The feeding and discharging mechanism includes a feeding component, a discharging component and a collecting tank (11); The feeding component is used to allow materials to enter the screening device. The feeding component includes a feeding trough (2) and a dust-proof port (13). The feeding trough (2) is placed at the top of the screening device. The dust-proof port (13) is located between the feeding trough (2) and the screening device. After adding a batch of materials, close the dust-proof port (13) to prevent mica sheet dust from escaping; The discharging component is used to allow materials to exit the screening device. The discharging component includes a guiding plate (5) and a discharging port (10). The guiding plate (5) is connected to an external collecting mechanism. The guiding plate (5) is used to guide the materials into the external collecting mechanism. The discharging port (10) is located on one side of each screening box (3). During the screening process, the discharging port (10) is in a closed state. When it is necessary to clean the sieve plate (9) after the screening is completed, open the discharging port (10); The collecting tank (11) is placed at the bottom of the screening device and above the servo motor (16). The collecting tank (11) moves in a horizontal push-pull manner and is used to collect the materials after multi-stage screening.

3. The intelligent screening device for mica sheets based on multi-stage vibration according to claim 1, characterized in that The multi-stage screening mechanism includes a driving motor (1), a screening box (3), a sieve plate (9), a swinging assembly (12), a transmission rod (14), a driving assembly (15), a servo motor (16), and a horizontal vibration device (18); The driving motor (1) is connected to the swinging assembly (12), and the driving motor (1) provides power for the operation of the swinging assembly (12); The sieve plate (9) is placed at the bottom of the screening box (3). The aperture of the sieve plate (9) in the upper layer is larger than that of the sieve plate (9) in the middle layer, and the aperture of the sieve plate (9) in the middle layer is larger than that of the sieve plate (9) in the lower layer; Each layer of the screening box (3) in the screening device has a set inclination angle to prevent material stacking; The swinging assembly (12) is used to swing the screening box (3) in the upper layer, and the swinging assembly (12) is installed on both sides of the screening box (3) in the upper layer; The horizontal vibration device (18) is placed on the sides of the screening boxes (3) in the middle and lower layers to generate horizontal vibrations with a set frequency and amplitude, causing the screening box (3) to vibrate back and forth in the horizontal direction; The servo motor (16) is installed at the bottom of the screening device, causing the driving assembly (15) to generate vertical vibrations and transmit them to the screening box (3) through the transmission rod (14); For the screening boxes (3) in the middle and lower layers, the transmission rods (14) on the opposite sides are responsible for transmitting vibrations and fixing respectively; The vertical vibration frequencies and amplitudes received by the screening boxes (3) in the middle and lower layers are the same.

4. The intelligent screening device for mica sheets based on multi-stage vibration according to claim 3, wherein The swinging assembly (12) includes a dial (121), a dial rod (122), a connecting seat (123), a smooth shaft (124), a connecting shaft (125), and a guiding column (126); the operation process of the swinging assembly (12) includes: Power is provided by the driving motor (1), causing the dial (121) to rotate counterclockwise. The dial (121) is connected to the dial rod (122) through the guiding column (126) and drives the dial rod (122) to move up and down. The other end of the dial rod (122) is connected to the connecting seat (123) through the connecting shaft (125). The connecting seat (123) is fixed on one side of the screening box (3). The connecting shaft (125) is driven to rotate by the dial rod (122). When the dial rod (122) moves, the connecting seat (123) moves up and down along the smooth shaft (124); when the guiding column (126) on the dial (121) rotates one full circle, the connecting seat (123) correspondingly moves back and forth along the smooth shaft (124); The diameters of the dials (121) of the two sets of swinging assemblies (12) on the same side of the screening device are the same, so that the relative positions of the guiding columns (126) on the dials (121) are always at the positions with the farthest linear distance during the movement process, so that the central position of the screening box (3) in the upper layer remains at a fixed height, while the heights on both sides change periodically.

5. The intelligent screening device for mica sheets based on multi-stage vibration according to claim 1, characterized in that, The cleaning mechanism includes a baffle plate (4), fixed sliders (6), a flexible brush (7), and a slide rail (8); the baffle plate (4) is perpendicular to the sieve plate (9) and is fixed by the fixed sliders (6) on both sides; the flexible brush (7) is installed at the bottom of the baffle plate (4); the inclination angle of the baffle plate (4) is adjusted through the connecting shaft of the fixed slider (6); on each level of the screening box (3), the slide rail (8) parallel to the sieve plate (9) is installed; During the screening process, the fixed slider (6) is at the end of the corresponding screening box (3), and the baffle plate (4) is in contact with the wall of the screening box; When the screening is over, the operation process of the cleaning mechanism includes: the fixed slider (6) drives the baffle plate (4) to move towards the side with the discharge port (10), the baffle plate (4) is used to apply a lateral force to move the material, and the flexible brush (7) cleans the material particles to assist the material particles to pass through the sieve or through the discharge port (10); when the fixed slider (6) moves to the position of the discharge port (10), the fixed slider (6) moves towards the end again for the second cleaning, and the baffle plate (4) is parallel to the sieve plate (9) during the movement; when the baffle plate (4) reaches the end, it rotates and makes the plane of the baffle plate (4) perpendicular to the sieve plate (9).

6. An intelligent screening system for mica sheets based on multi-level vibration, characterized in that, It includes a memory and a processor, and the processor is used to process the instructions stored in the memory to implement the following process: From the start time of the screening device to the current time, obtain the material weight data of the sieve plate of each target level at each target time; wherein, the target time is the time corresponding to the maximum value point; the target level is the second level or the third level; According to the material weight data at each target time, combined with the gravity coefficient and the vertical vibration frequency, determine the actual material weight of the screening box of each target level at each target time; According to the actual material weight at each target time, determine the vibration amplitude adjustment coefficient at the current time; Use the vibration amplitude adjustment coefficient to determine whether to adjust the vibration amplitude at the current time; If it is adjusted, use the vibration amplitude adjustment system to adjust the vibration amplitude at the current time to obtain the vibration amplitude at the next time of the current time.

7. The intelligent screening system for mica sheets based on multi-stage vibration according to claim 6, wherein The determining the actual material weight of the screening box of each target level at each target time according to the material weight data at each target time, combined with the gravity coefficient and the vertical vibration frequency, includes: For any screening box of a target level and any target time, use the vertical vibration frequency as the acceleration of the screening box; Calculate the value after adding the acceleration and the gravity coefficient; take the ratio of the material weight data at the target time to the added value as the actual material weight at the target time.

8. The intelligent screening system for mica sheets based on multi-stage vibration according to claim 6, characterized in that, The determining the vibration amplitude adjustment coefficient at the current time according to the actual material weight at each target time includes: For the screening box of the current level, obtain a preset number of target times adjacent to the current time, and form the current time period with each target time adjacent to the current time; Analyze the change in the actual weight difference between adjacent target times based on the actual material weight at each target time within the current period, and determine the adjustment requirement index for vertical vibration of the screening box at the current level at the current time; Obtain the aperture value of the sieve plate of the screening box at the current level, and determine the simulated passing material volume corresponding to the screening box at the current level through the aperture value of the sieve plate; Determine the screening efficiency index of the screening box at the current level at the current time according to the simulated passing material volume and the actual material weight of the screening box at the current level at the current time; Combine the adjustment requirement index and the screening efficiency index corresponding to the screening box at each target level at the current time to determine the vibration amplitude adjustment coefficient at the current time.

9. The intelligent screening system for mica sheets based on multi-stage vibration according to claim 8, wherein The step of analyzing the change in the actual weight difference between adjacent target times based on the actual material weight at each target time within the current period, and determining the adjustment requirement index for vertical vibration of the screening box at the current level at the current time includes: Calculate the difference in the actual material weight between the previous target time and the next target time within the current period to obtain each difference in the actual material weight; Determine the average value and variance value of all the differences in the actual material weight, and determine the adjustment requirement index for vertical vibration of the screening box at the current level at the current time according to the average value and variance value.

10. The intelligent screening system for mica sheets based on multi-stage vibration according to claim 6, characterized in that, Use the vibration amplitude adjustment coefficient to determine whether to adjust the vibration amplitude at the current time, including: Determine the vibration amplitude adjustment coefficient as the adjustment determination index, and set the adjustment determination threshold; If the adjustment determination index at the current time is greater than the adjustment determination threshold, adjust the vibration amplitude at the current time; if the adjustment determination index at the current time is less than or equal to the adjustment determination threshold, do not adjust the vibration amplitude at the current time.

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