Intelligent multi-stage screening device and control method thereof

Abstract

The application discloses an intelligent multi-stage screening device and a control method thereof, and is applied to the technical field of material screening.The device is provided with two groups of screening assemblies with different screening accuracies, can realize the effects of primary coarse screening and secondary fine screening on materials, can monitor the discharging conditions of corresponding discharge ports in real time during screening, and can adjust the running states of double-shaft electric cylinders in corresponding adjusting assemblies of the two screening assemblies in real time based on material outflow fluctuation curves and the inclination angles of the device bodies, so that the purpose of separating different specifications of materials is achieved, the effect of classifying the materials is achieved, the screening work of the materials is flexible, the tension of the metal screen of the screening assembly can be adjusted through the cooperation of the pushing members and the adjusting assemblies in the screening assembly, slight secondary vibration of the metal screen is generated in the running process of the metal screen, the blockage of the metal screen is reduced, and therefore, the screening efficiency of the materials is improved.

Description

Technical Field

[0001] This invention belongs to the field of material screening technology, and specifically relates to an intelligent multi-stage screening device and its control method. Background Technology

[0002] Material screening separates materials into different grades according to particle size to meet different production needs.

[0003] Currently, multi-stage screening of materials mainly utilizes multiple layers of screens with different apertures. Although multi-stage screening can be carried out simultaneously, some particles with apertures similar to the screen apertures are prone to clogging the screens during the screening process, which reduces the screening efficiency of the materials. Therefore, it is necessary to clean the clogged screens while the machine is stopped, which has a certain impact on the screening of materials.

[0004] Based on the above-mentioned problems, it can be found that existing devices on the market are difficult to avoid the problems mentioned above when in use, thus failing to achieve the desired effect. Therefore, we propose an intelligent multi-stage screening device that can reduce screen clogging and improve screening efficiency during use. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent multi-stage screening device and its control method to solve the above-mentioned technical problems.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: the device includes a device body mounted on an inclined mechanism and a vibrating component mounted at the bottom of the device body. Two mounting brackets are bolted to both sides inside the device body, and a screening component is provided inside the two mounting brackets on opposite sides. An adjusting component is provided at the bottom of the screening component, and the top of the adjusting component is inside the mounting bracket. The adjusting component works in conjunction with the screening component. A first solid flow meter is provided on the discharge port corresponding to the screening component located in the upper half of the mounting bracket, and a second solid flow meter is provided on the discharge port corresponding to the screening component located in the lower half of the mounting bracket.

[0007] Secondly, the present invention also provides a control method for an intelligent multi-stage screening device, the method comprising:

[0008] During the screening process, the material outflow fluctuation curves at the corresponding discharge ports are monitored in real time based on the second solid flow meter and the first solid flow meter. The operating status of the biaxial electric cylinders in the corresponding adjustment components of the two screening components is adjusted in real time based on the material outflow fluctuation curves, the feed rate and the tilt angle of the main body of the device.

[0009] The system involves real-time adjustment of the operating status of the dual-axis electric cylinders in the corresponding adjustment components of the two screening components based on the material outflow fluctuation curve, feed rate, and tilt angle of the main body of the device. This includes:

[0010] The tilt angle of the main body of the device is obtained, and the warning thresholds corresponding to the first solid flow meter and the second fixed flow meter are retrieved from the operating parameter reference table based on the tilt angle.

[0011] During screening, the amount of impurities removed from the corresponding discharge port is detected by the first solid flow meter and the second fixed flow meter, and the fluctuation of the amount of impurities removed during the first time period is statistically analyzed. If the amount of impurities removed by any solid flow meter increases rapidly or exceeds the corresponding warning threshold, the corresponding dual-shaft electric cylinder is activated to prevent the screening component from clogging. At the same time, the amount of impurities removed from each discharge port after the dual-shaft electric cylinder is activated is detected. If the amount of impurities removed exceeds the corresponding warning threshold, the corresponding second tilt angle is retrieved from the operating parameter reference table based on 110% to 125% of the current amount of impurities removed, and a second angle adjustment command is sent to adjust the tilt angle of the main body of the device to the second tilt angle. The amount of impurities removed continues to be detected. If the amount of impurities removed still shows an upward trend, the current discharge speed is reduced. The amount of impurities removed is the amount of solid impurities passing through the cylindrical slag discharge pipe at the end of the corresponding discharge port detected by the first solid flow meter and the second fixed flow meter within a unit time.

[0012] Optionally, the tilt angle of the main body of the device is adjusted to a second tilt angle, and the amount of impurities removed is continuously monitored. If the amount of impurities removed still shows an upward trend, the current unloading speed is reduced, including:

[0013] The current discharge speed is obtained, and after the tilt angle of the main body of the device is adjusted to the second tilt angle, the first discharge ratio and the second discharge ratio are calculated in sequence based on the first solid flow meter and the second solid flow meter. If the first discharge ratio increases abnormally, it indicates that the second tilt angle will cause abnormal blockage at the bottom of the tilted screening component in the upper part, resulting in abnormal screening. At this time, the current discharge speed needs to be reduced.

[0014] If both the first and second discharge ratios increase abnormally, it indicates that the second tilt angle will cause abnormal blockage at the bottom of both the upper and lower screening components. This indicates that the second tilt angle is too large, causing the material to be too concentrated at the bottom of the screening components. In this case, the second tilt angle needs to be slightly adjusted to reduce the accumulation of material at the bottom of the screening components.

[0015] By adopting the above technical solution, and setting two sets of screening components with different screening precision settings, the material can be screened at the first stage (coarse screening) and the material at the second stage (fine screening). During screening, the discharge situation at the corresponding outlet is monitored in real time, and the operation status of the dual-shaft electric cylinders in the corresponding adjustment components of the two screening components is adjusted in real time based on the material outflow fluctuation curve and the tilt angle of the main body of the device. This enables the separation of solid materials of different specifications, making the screening work more flexible. Furthermore, by cooperating with the pusher and adjustment components in the screening components, the tension of the metal screen in the screening components is adjusted, causing the metal screen to generate slight secondary vibration during operation, thereby reducing the clogging of the metal screen and improving the screening efficiency of the material.

[0016] The present invention is further configured such that: the screening assembly includes a bottom support plate, the bottom support plate is located inside between two mounting brackets on opposite sides, and a rectangular rim is bolted to the top of the bottom support plate; a longitudinal partition is bolted to the middle of the top of the bottom support plate, and several transverse partitions are bolted to both sides of the longitudinal partition; the sides of the longitudinal and transverse partitions near the rectangular rim are bolted to the rectangular rim, forming a compartment between the longitudinal and transverse partitions; a metal screen is provided on the top of the rectangular rim, and a rectangular pressure strip and a longitudinal pressure strip are respectively provided on the top of the metal screen; the rectangular pressure strip and the longitudinal pressure strip are respectively bolted to the rectangular rim and the longitudinal partition by fixing bolts; and pushing members are provided on both sides inside the bottom support plate, and the pushing members are used in conjunction with the metal screen.

[0017] The present invention is further configured such that the screening specifications of the top and bottom metal screens are set differently, and the screening accuracy of the bottom metal screen is higher than that of the top metal screen.

[0018] By adopting the above technical solution, and by setting the top and bottom metal screens with different screening accuracies, the material can be screened as a primary coarse screen and a secondary fine screen, thus achieving the function of separating solid materials of different specifications and making the material screening work more flexible.

[0019] The present invention is further configured such that the interior of the base plate is perforated, and the aperture is larger than that of the metal screen.

[0020] By adopting the above technical solution, the perforated design inside the bottom support plate can achieve the effect of material discharge.

[0021] The present invention is further configured such that: the pushing member includes a limiting sleeve, the limiting sleeve is embedded inside the bottom support plate, and a moving rod is slidably connected inside the limiting sleeve; a connecting plate is welded to the top of the moving rod, and a limiting spring is connected to the top of the connecting plate; a pressure wheel is connected to the top of the limiting spring, and the surface of the pressure wheel contacts the metal screen; the bottom of the moving rod extends to the bottom of the bottom support plate and is bolted with a contact wheel, and the contact wheel is used in conjunction with the adjusting component.

[0022] By adopting the above technical solution, a pushing component is set up so that when the adjusting component contacts the contact wheel, it will push the wheel upward. The moving rod will then push the connecting plate upward and squeeze the limiting spring. This allows the limiting spring to adjust the force applied to the metal screen by the pressure wheel. The elasticity of the limiting spring can adjust the tension of the metal screen and keep it within a certain range. Therefore, the metal screen will generate slight secondary vibration during operation, thereby reducing the clogging of the metal screen and ensuring the screening efficiency and accuracy of the material.

[0023] The present invention is further configured such that: a fixing column is welded inside the mounting frame, and a plurality of positioning blocks are sleeved on the surface of the fixing column, and the positioning blocks are bolted to the side of the rectangular perimeter, and a threaded sleeve is threaded to the front side of the surface of the fixing column, and positioning plates are welded to the top and bottom of the threaded sleeve, and the rear side of the positioning plate is in close contact with the mounting frame.

[0024] By adopting the above technical solution, by setting a fixed column, positioning block, screw sleeve and positioning plate, the positioning block can be sequentially fitted onto the surface of the fixed column during the installation of the screening component. The screw sleeve is engaged with the thread of the fixed column, so that the screw sleeve can rotate and move on the surface of the fixed column until the positioning plate is in close contact with the mounting frame. This can achieve the effect of fixing the position of the screening component, thereby facilitating the disassembly and assembly of the screening component.

[0025] The present invention is further configured such that: the adjustment assembly includes two dual-axis electric cylinders, and the dual-axis electric cylinders are respectively bolted to the inside of two mounting brackets on both sides; the output end of the dual-axis electric cylinder is bolted to a connecting shaft, and a connecting bracket is bolted to the side of the connecting shaft away from the dual-axis electric cylinder; a swing plate is rotatably connected inside the connecting bracket; a fixed plate is bolted between the opposite sides of the two swing plates on both sides; and two push blocks are bolted to the top of the fixed plate; the push blocks are used in conjunction with contact wheels.

[0026] By adopting the above technical solution and setting the adjustment component, the output end of the dual-axis electric cylinder can drive the two connecting shafts to move in opposite directions. This allows the swing plate to swing around the connection point with the mounting frame as the axis, and simultaneously drives the push block to move towards the contact wheel through the fixed plate. The push block then pushes the contact wheel upward, thereby adjusting the force applied to the metal screen by the pusher, thus achieving the effect of adjusting the tension of the metal screen.

[0027] The invention is further configured such that: the bottom of the swing plate extends into the interior of the mounting frame, and a limiting shaft passes through the interior of the swing plate, with both sides of the limiting shaft connected to the interior of the mounting frame.

[0028] By adopting the above technical solution and setting a limit shaft, the swing plate and the mounting frame can be rotatably connected.

[0029] The present invention is further configured such that the side of the push block near the contact wheel is inclined, and the inclined surfaces of the two push blocks on the front and rear sides are arranged in opposite directions.

[0030] By adopting the above technical solution, the contact wheel can be gradually moved upward by setting one side of the push block at an angle.

[0031] The present invention is further configured such that: the number of the pushing members is several, and two on each side are arranged as a group, and they are distributed at a certain interval on the top of the bottom support plate.

[0032] By adopting the above technical solution, and by setting two pushers on both sides as a group, and setting multiple groups, the tension of the metal screen can be adjusted evenly.

[0033] In summary, the present invention has the following beneficial effects:

[0034] This invention, by setting two sets of screening components with different screening precision, can achieve the effect of primary coarse screening and secondary fine screening of materials. During screening, the discharge situation of the corresponding outlet is monitored in real time, and the operation of the dual-shaft electric cylinder in the corresponding adjustment component of the two screening components is adjusted in real time based on the material outflow fluctuation curve and the tilt angle of the main body of the device. This achieves the purpose of separating solid materials of different specifications, making the material screening work more flexible. Furthermore, by the cooperation between the push component and the adjustment component in the screening component, the tension of the metal screen in the screening component is adjusted, so that the metal screen generates slight secondary vibration during operation, thereby reducing the clogging of the metal screen and improving the screening efficiency of materials. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is a schematic diagram showing the connection between the main body of the device and the screening component of the present invention;

[0037] Figure 3 This is a schematic diagram of the screening component structure of the present invention;

[0038] Figure 4 This is a schematic diagram showing the connection between the screening component and the mounting frame of the present invention;

[0039] Figure 5 This is a schematic diagram showing the connection between the pusher and the adjustment assembly of the present invention;

[0040] Figure 6 This is a schematic diagram of the pushing component structure of the present invention;

[0041] Figure 7 This is the invention Figure 3 Enlarged diagram of point A in the middle.

[0042] Reference numerals: 1. Main body of the device; 3. Mounting frame; 4. Screening assembly; 41. Base plate; 42. Rectangular edging; 43. Longitudinal partition; 44. Transverse partition; 46. Metal screen; 47. Rectangular pressure strip; 48. Longitudinal pressure strip; 49. Pushing component; 491. Limiting sleeve; 492. Moving rod; 493. Connecting plate; 494. Limiting spring; 495. Pressing roller; 496. Contact roller; 5. Adjusting assembly; 51. Dual-axis electric cylinder; 52. Connecting shaft; 53. Connecting frame; 54. Swing plate; 55. Fixing plate; 56. Pushing block; 6. Fixing column; 7. Positioning block; 8. Screw sleeve; 9. Positioning plate; 10. Limiting shaft. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings.

[0044] refer to Figures 1-7 An intelligent multi-stage screening device is disclosed. The device includes a main body 1 and a vibrating component located at the bottom of the main body 1. Two mounting brackets 3 are bolted to both sides inside the main body 1, and screening components 4 are arranged inside the space between opposite sides of the two mounting brackets 3. Multiple sets of adjusting components 5 are arranged at the bottom of the screening components 4, and the tops of the adjusting components 5 are located inside the mounting brackets 3. The adjusting components 5 cooperate with the screening components 4. A first solid flow meter is installed on the discharge port corresponding to the screening components 4 located in the upper half of the mounting brackets 3, and a second solid flow meter is installed on the discharge port corresponding to the screening components 4 located in the lower half of the mounting brackets 3. Since the arrangement of the two discharge ports is a conventional technical means in this field, therefore... Figure 1 The specific internal mechanical structure is not shown, but as Figure 1As shown in the lower right end, it has two layers of impurity or large particle discharge plates embedded inside, corresponding to the discharge ends of the upper and lower half of the screening component 4, respectively. At the end of the discharge plate is a cylindrical slag discharge pipe, on which a solid flow meter is installed. Furthermore, the discharge end at the bottom of the inner cavity of the main body 1 can be directly connected to the packaging port or the feed port of the next process, which will not be elaborated here. By setting two sets of screening components 4 with different screening precision settings, it can achieve the effect of primary coarse screening and secondary fine screening of materials. This realizes the function of separating solids of different specifications of materials, making the material screening work more flexible. Furthermore, through the cooperation of the pushing component 49 and the adjusting component 5 in the screening component 4, the tension of the metal screen 46 of the screening component 4 can be adjusted, causing the metal screen 46 to generate slight secondary vibration during operation, thereby reducing the clogging of the metal screen 46 and improving the material screening efficiency. The specific implementation method is as follows:

[0045] During the screening process, the material outflow fluctuation curve of the corresponding discharge port is monitored in real time based on the second solid flow meter and the first solid flow meter, and the operating status of the dual-shaft electric cylinder 51 in the corresponding adjustment component 5 of the two screening components 4 is adjusted in real time based on the material outflow fluctuation curve and the tilt angle of the main body 1.

[0046] The operation status of the dual-shaft electric cylinder 51 in the corresponding adjustment component 5 of the two screening components 4 is adjusted in real time based on the material outflow fluctuation curve, feed rate, and tilt angle of the main body 1. This includes:

[0047] The tilt angle of the main body 1 of the device is obtained, and the warning thresholds corresponding to the first solid flow meter and the second fixed flow meter are retrieved from the operating parameter reference table based on the tilt angle.

[0048] During screening, the amount of impurities removed from the corresponding discharge port is detected by the first solid flow meter and the second fixed flow meter, and the fluctuation of the amount of impurities removed during the first time period is statistically analyzed. If the amount of impurities removed by any solid flow meter increases rapidly or exceeds the corresponding warning threshold, the corresponding dual-shaft electric cylinder 51 is activated to prevent the screening component 4 from clogging. At the same time, the amount of impurities removed from each discharge port after the activation of the dual-shaft electric cylinder 51 is detected. If the amount of impurities removed exceeds the corresponding warning threshold, the corresponding second tilt angle is retrieved from the operating parameter reference table based on 110% to 125% of the current amount of impurities removed, and a second angle adjustment command is sent to adjust the tilt angle of the main body 1 of the device to the second tilt angle. The amount of impurities removed continues to be detected. If the amount of impurities removed still shows an upward trend, the current discharge speed is reduced. The amount of impurities removed is the amount of solid impurities passing through the cylindrical slag discharge pipe at the end of the corresponding discharge port detected by the first solid flow meter and the second fixed flow meter within a unit time.

[0049] The device body 1 is tilted at a second tilt angle, and the amount of impurities removed is continuously monitored. If the amount of impurities removed continues to rise, the current material discharge speed is reduced, including:

[0050] The current material discharge speed is obtained, and after the tilt angle of the main body 1 is adjusted to the second tilt angle, the first discharge ratio and the second discharge ratio are calculated sequentially based on the first solid flow meter and the second solid flow meter. If the first discharge ratio increases abnormally, it indicates that the second tilt angle will cause abnormal blockage at the tilt bottom of the upper screening component 4, resulting in abnormal screening. At this time, the current material discharge speed needs to be reduced.

[0051] If both the first and second discharge ratios increase abnormally, it indicates that the second tilt angle will cause abnormal blockage at the bottom of both the upper and lower screening components 4. This indicates that the second tilt angle is too large, causing the material to be too concentrated at the bottom of the screening component 4. At this time, the second tilt angle needs to be adjusted slightly to reduce the accumulation of material at the bottom of the screening component 4.

[0052] like Figure 3 As shown, the screening assembly 4 includes a base plate 41, which is located inside between the two mounting brackets 3 on opposite sides. A rectangular rim 42 is bolted to the top of the base plate 41. A longitudinal partition 43 is bolted to the middle of the top of the base plate 41, and several transverse partitions 44 are bolted to both sides of the longitudinal partition 43. The sides of the longitudinal partitions 43 and the transverse partitions 44 closest to the rectangular rim 42 are both bolted to the rectangular rim 42. A compartment is formed between the longitudinal partitions 43 and the transverse partitions 44. A metal screen is provided on the top of the rectangular rim 42. 46. ​​The top of the metal screen 46 is provided with rectangular pressure strips 47 and longitudinal pressure strips 48, and the rectangular pressure strips 47 and longitudinal pressure strips 48 are respectively bolted to the rectangular perimeter 42 and the longitudinal partition 43 by fixing bolts. Pushing members 49 are provided on both sides inside the bottom support plate 41, and the pushing members 49 are used in conjunction with the metal screen 46. By setting the screening component 4, the material is screened in multiple stages by the metal screen 46, and the rectangular pressure strips 47 and longitudinal pressure strips 48 can restrict the position of the metal screen 46 to make it operate stably.

[0053] like Figure 2 As shown, the screening specifications of the top and bottom metal screens 46 are set differently, and the screening accuracy of the bottom metal screen 46 is higher than that of the top metal screen 46. By setting the screening accuracy of the top and bottom metal screens 46 to be different, the effect of primary coarse screening and secondary fine screening of materials is achieved, that is, the function of separating solid materials of different specifications is realized, making the screening work of materials more flexible.

[0054] like Figure 3As shown, the bottom support plate 41 has a perforated interior with a hole diameter larger than that of the metal screen 46. The perforated interior of the bottom support plate 41 facilitates material discharge.

[0055] like Figure 6 As shown, the pushing component 49 includes a limiting sleeve 491, which is embedded inside the base plate 41. A moving rod 492 is slidably connected inside the limiting sleeve 491. A connecting plate 493 is welded to the top of the moving rod 492, and a limiting spring 494 is connected to the top of the connecting plate 493. A pressing wheel 495 is connected to the top of the limiting spring 494, and the surface of the pressing wheel 495 contacts the metal screen 46. The bottom of the moving rod 492 extends to the bottom of the base plate 41 and is bolted with a contact wheel 496. The contact wheel 496 is used in conjunction with the adjusting component 5. By setting the pusher 49, when the adjusting component 5 contacts the contact wheel 496, it will push the wheel upward, and the moving rod 492 will push the connecting plate 493 upward, and squeeze the limiting spring 494. The limiting spring 494 adjusts the force applied to the metal screen 46 by the pressure wheel 495. The elasticity of the limiting spring 494 can adjust the tension of the metal screen 46 and keep it within a certain range. Therefore, the metal screen 46 will generate slight secondary vibration during operation, thereby reducing the clogging of the metal screen 46 and ensuring the screening efficiency and accuracy of the material.

[0056] like Figure 3 and Figure 7 As shown, a fixing column 6 is welded inside the mounting frame 3, and several positioning blocks 7 are sleeved on the surface of the fixing column 6. The positioning blocks 7 are bolted to the side of the rectangular perimeter 42. A threaded sleeve 8 is threaded to the front side of the surface of the fixing column 6, and positioning plates 9 are welded to the top and bottom of the threaded sleeve 8. The rear side of the positioning plate 9 is in close contact with the mounting frame 3. By setting the fixing column 6, positioning blocks 7, threaded sleeve 8 and positioning plate 9, when the screening component 4 is installed, the positioning blocks 7 are sequentially sleeved on the surface of the fixing column 6, and the threaded engagement between the threaded sleeve 8 and the fixing column 6 allows the threaded sleeve 8 to rotate and move on the surface of the fixing column 6 until the positioning plate 9 is in close contact with the mounting frame 3. This achieves the effect of fixing the position of the screening component 4, thereby facilitating the disassembly and assembly of the screening component 4.

[0057] like Figure 5As shown, the adjustment assembly 5 includes two dual-axis electric cylinders 51, which are respectively bolted to the inside of the two mounting brackets 3 on both sides. The output end of the dual-axis electric cylinder 51 is bolted to a connecting shaft 52, and the side of the connecting shaft 52 away from the dual-axis electric cylinder 51 is bolted to a connecting bracket 53. The inside of the connecting bracket 53 is rotatably connected to a swing plate 54, and a fixed plate 55 is bolted between the opposite sides of the two swing plates 54 on both sides. Two push blocks 56 are bolted to the top of the fixed plate 55. The push blocks 56 are used in conjunction with the contact wheel 496. By setting the adjustment assembly 5, the output end of the dual-axis electric cylinder 51 can drive the two connecting shafts 52 to move in opposite directions, so that the swing plate 54 can swing around the connection point with the mounting bracket 3 as the axis point, and simultaneously drive the push blocks 56 to move towards the contact wheel 496 through the fixed plate 55, and push the contact wheel 496 to move upward, thereby achieving the purpose of adjusting the force applied by the pusher 49 to the metal screen 46, thus achieving the effect of adjusting the tension of the metal screen 46.

[0058] like Figure 4 As shown, the bottom of the swing plate 54 extends into the interior of the mounting frame 3, and the interior of the swing plate 54 is penetrated by a limiting shaft 10. Both sides of the limiting shaft 10 are connected to the interior of the mounting frame 3. By setting the limiting shaft 10, the swing plate 54 and the mounting frame 3 can be rotatably connected.

[0059] like Figure 5 As shown, the push block 56 is inclined on one side near the contact wheel 496, and the inclined surfaces of the front and rear push blocks 56 are opposite. By having one side of the push block 56 inclined, the contact wheel 496 can be gradually pushed upward.

[0060] like Figure 2 As shown, there are several pushers 49, with two on each side as a group, and they are distributed at a certain interval on the top of the bottom support plate 41. By setting two pushers 49 on each side as a group and setting multiple groups, the tension of the metal screen 46 can be adjusted evenly.

[0061] Brief description of the operation: The material to be screened is fed into the main body 1 of the device and placed on the metal screen 46 at the top. Simultaneously, the vibrating structure of the main body 1 causes the entire device to vibrate. The tension of the metal screen 46 is adjusted according to the material being screened. The output end of the dual-shaft electric cylinder 51 drives the two connecting shafts 52 to move in opposite directions, causing the swing plate 54 to swing around its connection point with the mounting frame 3. Simultaneously, the fixed plate 55 drives the pushing block 56 to move towards the contact wheel 496, causing the pushing block 56 to push the contact wheel 496 upwards. Rod 492 pushes connecting plate 493 upward and squeezes limit spring 494, causing limit spring 494 to adjust the force applied to metal screen 46 by pressure roller 495. The elasticity of limit spring 494 can adjust the tension of metal screen 46 and keep it within a certain range. Metal screen 46 generates a certain secondary vibration to prevent clogging. The material can be screened by two metal screens 46 with different precision at the top and bottom, and then discharged through the corresponding discharge channels to complete the multi-stage screening of the material.

[0062] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A control method for an intelligent multi-stage screening device, the device comprising a device body (1) mounted on an inclined mechanism and a vibrating component located at the bottom of the device body (1), wherein two mounting brackets (3) are bolted to both sides of the device body (1), and screening components (4) are provided inside the two mounting brackets (3) on opposite sides, and an adjusting component (5) is provided at the bottom of the screening component (4), the top of the adjusting component (5) is located inside the mounting bracket (3), and the adjusting component (5) is used in conjunction with the screening component (4), characterized in that, A first solid flow meter is provided on the discharge port corresponding to the screening component (4) located in the upper half of the mounting frame (3), and a second solid flow meter is provided on the discharge port corresponding to the screening component (4) located in the lower half of the mounting frame (3). The method includes: During the screening process, the material outflow fluctuation curve of the corresponding discharge port is monitored in real time based on the second solid flow meter and the first solid flow meter, and the operating status of the dual-shaft electric cylinder (51) in the corresponding adjustment component (5) of the two screening components (4) is adjusted in real time based on the material outflow fluctuation curve and the tilt angle of the main body (1). Among them, the operating status of the dual-shaft electric cylinder (51) in the corresponding adjustment component (5) of the two screening components (4) is adjusted in real time based on the material outflow fluctuation curve, feed rate and tilt angle of the main body of the device (1), including: Obtain the tilt angle of the main body of the device (1), and retrieve the warning threshold corresponding to the first solid flow meter and the second fixed flow meter from the operating parameter reference table based on the tilt angle; During the screening process, the amount of impurities removed from the corresponding outlet is detected by the first solid flow meter and the second fixed flow meter, and the fluctuation of the amount of impurities removed during the first time period is statistically analyzed. If the amount of impurities removed by any solid flow meter increases rapidly or exceeds the corresponding warning threshold, the corresponding dual-shaft electric cylinder (51) is activated to prevent the screening component (4) from being blocked. At the same time, the amount of impurities removed from each outlet after the activation of the dual-shaft electric cylinder (51) is detected. If the amount of impurities removed exceeds the corresponding warning threshold, the corresponding second tilt angle is retrieved from the operating parameter reference table based on 110% to 125% of the current amount of impurities removed, and a second angle adjustment command is sent to adjust the tilt angle of the main body (1) of the device to the second tilt angle. The amount of impurities removed is continuously detected. If the amount of impurities removed still shows an upward trend, the current discharge speed is reduced. The amount of impurities removed is the amount of solid impurities passing through the cylindrical slag discharge pipe at the end of the corresponding outlet detected by the first solid flow meter and the second fixed flow meter within a unit time. The device body (1) is tilted at a second tilt angle, and the amount of impurities removed is continuously monitored. If the amount of impurities removed continues to rise, the current material discharge speed is reduced, including: Get the current discharge speed, and after the tilt angle of the main body (1) is adjusted to the second tilt angle, calculate the first discharge ratio and the second discharge ratio based on the first solid flow meter and the second solid flow meter in sequence. If the first discharge ratio increases abnormally, it indicates that the second tilt angle will cause abnormal blockage at the bottom of the tilt of the upper screening component (4), and the screening will be abnormal. At this time, it is necessary to reduce the current discharge speed. If both the first and second discharge ratios increase abnormally, it indicates that the second tilt angle will cause abnormal blockage at the bottom of both the upper and lower screening components (4). This indicates that the second tilt angle is too large, causing the material to be too concentrated at the bottom of the screening component (4). At this time, the second tilt angle needs to be adjusted slightly to reduce the accumulation of material at the bottom of the screening component (4).

2. The control method for an intelligent multi-stage screening device according to claim 1, characterized in that: The screening assembly (4) includes a bottom support plate (41), which is located inside between two mounting brackets (3) on opposite sides. A rectangular rim (42) is bolted to the top of the bottom support plate (41). A longitudinal partition (43) is bolted to the middle of the top of the bottom support plate (41), and several transverse partitions (44) are bolted to both sides of the longitudinal partition (43). The longitudinal partitions (43) and transverse partitions (44) are bolted to the rectangular rim (42) on the side closest to the rectangular rim (42). A compartment is formed between the plate (43) and the transverse partition (44). A metal screen (46) is provided on the top of the rectangular rim (42). A rectangular pressure strip (47) and a longitudinal pressure strip (48) are respectively provided on the top of the metal screen (46). The rectangular pressure strip (47) and the longitudinal pressure strip (48) are respectively bolted to the rectangular rim (42) and the longitudinal partition (43) by fixing bolts. Pushing members (49) are provided on both sides inside the bottom support plate (41). The pushing members (49) are used in conjunction with the metal screen (46).

3. The control method for an intelligent multi-stage screening device according to claim 2, characterized in that: The two metal screens (46) at the top and bottom are set with different screening specifications, and the screening accuracy of the bottom metal screen (46) is higher than that of the top metal screen (46).

4. The control method for an intelligent multi-stage screening device according to claim 2, characterized in that: The bottom plate (41) has a perforated interior, and the perforation diameter is larger than that of the metal screen (46).

5. The control method for an intelligent multi-stage screening device according to claim 2, characterized in that: The pusher (49) includes a limiting sleeve (491), which is embedded inside the base plate (41). A moving rod (492) is slidably connected inside the limiting sleeve (491). A connecting plate (493) is welded to the top of the moving rod (492), and a limiting spring (494) is connected to the top of the connecting plate (493). A pressure wheel (495) is connected to the top of the limiting spring (494), and the surface of the pressure wheel (495) contacts the metal screen (46). The bottom of the moving rod (492) extends to the bottom of the base plate (41) and is bolted with a contact wheel (496), which is used in conjunction with the adjusting assembly (5).

6. The control method for an intelligent multi-stage screening device according to claim 2, characterized in that: The mounting bracket (3) has a fixed column (6) welded inside, and a number of positioning blocks (7) are sleeved on the surface of the fixed column (6). The positioning blocks (7) are bolted to the side of the rectangular perimeter (42). The front side of the surface of the fixed column (6) is threaded with a screw sleeve (8), and the top and bottom of the screw sleeve (8) are welded with positioning plates (9). The rear side of the positioning plate (9) is in close contact with the mounting bracket (3).

7. The control method for an intelligent multi-stage screening device according to claim 5, characterized in that: The adjustment assembly (5) includes two dual-axis electric cylinders (51), and the dual-axis electric cylinders (51) are respectively bolted to the inside of two mounting brackets (3) on both sides. The output end of the dual-axis electric cylinder (51) is bolted to a connecting shaft (52), and the side of the connecting shaft (52) away from the dual-axis electric cylinder (51) is bolted to a connecting bracket (53). The inside of the connecting bracket (53) is rotatably connected to a swing plate (54), and a fixed plate (55) is bolted between the opposite sides of the two swing plates (54) on both sides. Two push blocks (56) are bolted to the top of the fixed plate (55). The push blocks (56) are used in conjunction with the contact wheel (496). The side of the push block (56) near the contact wheel (496) is inclined, and the inclined surfaces of the front and rear push blocks (56) are opposite.

8. The control method for an intelligent multi-stage screening device according to claim 7, characterized in that: The bottom of the swing plate (54) extends into the interior of the mounting bracket (3), and the interior of the swing plate (54) is penetrated by a limiting shaft (10), both sides of which are connected to the interior of the mounting bracket (3).

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