An intelligent vibration screening device for plastic particle processing

Abstract

The present invention provides an intelligent vibration screening device for plastic particle processing, including support legs, screening cooling components and intelligent control panels, wherein a buffer spring is fixedly installed on the top of the support legs, the screening cooling components are arranged through the top of the screening frame, and the intelligent control panel is fixedly arranged on the outer edge surface of the screening frame, and is used to control the start, stop and adjust the vibration frequency of the vibration motor, as well as control the working state of the water pump, supply water to the installation water tank through the water pipe, control the nozzle to evenly spray cooling water to the screening area, reduce the material temperature, and ensure the stability of the material quality during the screening process. The present invention realizes precise control of vibration screening and cooling during the plastic particle processing process by integrating the control mode of the intelligent control panel, the vibration motor, and the water pump, solves the problem that the material state cannot be monitored in real time and the equipment operation parameters cannot be dynamically adjusted in the prior art, and ensures the stability of the material quality during the screening process.

Description

Technical Field

[0001] The invention relates to the technical field of plastic particle production, and in particular to an intelligent vibration screening device for plastic particle processing. Background Art

[0002] Plastic particles are the common name for plastic granules. They are the raw materials for storage, transportation and processing of plastics in the form of semi-finished products. Plastic is a polymer material. Ethylene, propylene, vinyl chloride, styrene, etc. can be produced using petroleum as raw material. The molecules of these substances can react with each other under certain conditions to generate compounds with large molecular weight, namely polymers. Usually, a plastic particle vibrating screen is required to screen the plastic particles before processing them. This can effectively prevent the discovery of certain bad particles in the material.

[0003] During the screening process, the impact force generated by vibration often causes damage to the equipment itself, shortening the life of the equipment. At the same time, the instability of vibration will also affect the screening accuracy, making the screening effect unsatisfactory. During the screening process, the friction between plastic particles and between particles and the screen will generate a lot of heat, causing the material temperature to rise. High temperature will not only affect the physical properties of plastic particles, such as melt index, tensile strength, etc., but may also cause adhesion between particles, further reducing the screening efficiency.

[0004] In the current existing technology, such as the plastic particle screening machine disclosed in the patent document (CN110181710A), by integrating the unloading screen plate flipping technology, the protection mechanism, the cooling mechanism and the lever mechanism in the plastic particle screening machine, it realizes the automatic discharge of agglomerated plastic particles, prevents particles from falling, reduces the particle temperature and enhances the particle activity range, thereby reducing the manual labor intensity and improving the screening efficiency and quality.

[0005] The defects are that there is no mechanism to monitor the material status in real time by using temperature, humidity or particle size sensors, there is no mechanism to automatically adjust the vibration frequency or intensity to adapt to different screening needs, and it is impossible to dynamically adjust the equipment operating parameters through environmental monitoring equipment, resulting in the equipment being unable to maintain the best screening effect and efficiency when facing different material characteristics and environmental conditions.

[0006] Another example is the plastic particle screening system mentioned in patent CN118719621A, which proposes to automatically screen plastic particles with unqualified colors by integrating components such as silos, buffer hoppers, vibrating hoppers, particle chutes and color sorters to prevent them from entering the next process flow, thereby effectively improving the quality and output rate of the product. Similarly, the system does not propose a mechanism for real-time monitoring of the material state by temperature, humidity or particle size sensors, which makes it impossible to provide real-time feedback and processing of the physical properties of the material. For example, when the material humidity increases or the particle size distribution is uneven, the system cannot make corresponding adjustments. In addition, the system lacks a mechanism for automatically adjusting the vibration frequency or intensity to adapt to different screening requirements. For example, when processing plastic particles of different densities or shapes, fixed vibration parameters are not sufficient to achieve the best screening effect. Furthermore, the system cannot dynamically adjust the equipment operating parameters through environmental monitoring equipment, which means that when the ambient temperature changes or the production line speed is adjusted, the system cannot automatically optimize its performance to adapt to these changes, resulting in reduced screening efficiency or reduced screening accuracy.

[0007] Therefore, it is urgent to design an intelligent vibration screening device to control the entire process of feeding, screening and cooling through a control panel, monitor and adjust the equipment operating status in real time, and dynamically adjust the operating parameters to adapt to different material characteristics and environmental conditions. Summary of the invention

[0008] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an intelligent vibration screening device for plastic particle processing. Solve the problems of the prior art. In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: an intelligent vibration screening device for plastic particle processing, comprising a support leg, a screening and cooling assembly and an intelligent control panel, wherein a buffer spring is fixedly installed on the top of the support leg, and the buffer spring is fixedly installed on the screening frame through a mounting plate; a support column is fixedly installed on the side of the screening frame, and a vibration motor is fixedly installed on the top of the support column; the output end of the vibration motor is provided with a vibration shaft that movably passes through the outer wall of one side of the screening frame and extends to the inside of the screening frame, and the outer wall of the vibration shaft is provided with a connecting column arranged inside the screening frame; the screening and cooling assembly is arranged above the screening frame, including a cooling part The cooling part includes a protective cover fixedly mounted on the top of the screening frame; a cooling water tank fixedly mounted on the top of the protective cover, and a water pump is arranged inside the cooling water tank, the water pump is connected with the cooling water tank through a water pipe, the other end of the water pipe is connected with the installation water tank through a connecting hose, and nozzles are evenly and equidistantly arranged at the bottom of the installation water tank; the intelligent control panel is fixedly mounted on the outer edge of the screening frame, and is used to control the start, stop and adjust the vibration frequency of the vibration motor, as well as control the working state of the water pump, supply water to the installation water tank through the water pipe, and control the nozzle to evenly spray cooling water to the screening area, so as to reduce the material temperature and ensure the stable quality of the material during the screening process.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The present invention realizes precise control of vibration screening and cooling in the plastic particle processing process by integrating the control mode of intelligent control panel, vibration motor and water pump, and solves the problem in the prior art that it is impossible to monitor the material status in real time and dynamically adjust the equipment operation parameters. Specifically, the proposed intelligent control panel can start and stop the vibration motor and adjust its vibration frequency, and at the same time control the working state of the water pump, supply water to the installed water tank through the water pipe, drive the nozzle to evenly spray cooling water to the screening area, effectively reduce the material temperature, and ensure the stability of the material quality during the screening process. In addition, the present invention also proposes to dynamically adjust the speed of the vibration motor and the flow rate of the water pump through the PID control algorithm to adapt to the changes in material properties and environmental conditions, improve the screening efficiency and the quality of material processing, not only reduce the labor intensity of manual labor, but also significantly improve the automation level and output rate of plastic particle production, ensure the quality of the product, and meet the needs of modern plastic particle production for efficient, stable and intelligent equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0012] Figure 1 It is a schematic diagram of the process flow of program control of the intelligent control panel proposed in one embodiment of the present invention;

[0013] Figure 2 It is a schematic diagram of the overall structure of the intelligent vibration screening device proposed in one embodiment of the present invention;

[0014] Figure 3 It is a side view structural schematic diagram of an intelligent vibration screening device proposed in one embodiment of the present invention;

[0015] Figure 4 A side view of the screening frame structure of the intelligent vibration screening device proposed in one embodiment of the present invention;

[0016] Figure 5 It is a schematic cross-sectional structure diagram of an intelligent vibration screening device proposed in one embodiment of the present invention;

[0017] Figure 6 It is a schematic side view of the structure of the feed screening part of the intelligent vibration screening device proposed in one embodiment of the present invention;

[0018] Figure 7 It is a schematic side view of the cooling part structure of the intelligent vibration screening device proposed in one embodiment of the present invention.

[0019] Reference numerals:

[0020] 1-support leg, 2-buffer spring, 3-screening frame, 4-support column, 5-vibration motor, 51-connecting column, 7-screening cooling assembly, 71-feeding and screening part, 711-feeding hopper, 712-guide ramp, 713-filter plate, 714-support seat, 715-rotating motor, 716-rotating shaft, 717-V-type control plate, 718-screening plate, 719-discharging guide plate, 7110-screening hole, 71 11-discharging hopper, 72-pushing part, 721-chute, 722-slide rail, 723-U-shaped sliding plate, 724-connecting plate, 725-electric telescopic rod, 726-pushing plate, 73-cooling part, 731-protective cover, 732-cooling water tank, 733-supplementing pipe, 734-water pump, 735-water pipe, 736-installation water tank, 737-connecting hose, 738-sprinkler, 6-intelligent control panel. DETAILED DESCRIPTION

[0021] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0022] The present invention is further described in detail below with reference to the accompanying drawings, but is not intended to limit the present invention.

[0023] As an understanding of the technical concept and implementation principle of the present invention, the main purpose of the present invention is to solve the following problems existing in the prior art: since there is no mechanism for real-time monitoring of the material status by using temperature, humidity or particle size sensors, there is a lack of a mechanism for automatically adjusting the vibration frequency or intensity to adapt to different screening requirements, and it is impossible to dynamically adjust the equipment operating parameters through environmental monitoring equipment, resulting in the equipment being unable to maintain the best screening effect and efficiency when facing different material characteristics and environmental conditions.

[0024] like Figure 1 - Figure 7As shown, as an embodiment of the present invention, an intelligent vibration screening device for plastic particle processing is proposed. By integrating the control mode of the intelligent control panel, the vibration motor and the water pump, the accurate control of the vibration screening and cooling in the plastic particle processing process is realized, and the problem that the material state cannot be monitored in real time and the equipment operation parameters cannot be adjusted dynamically in the prior art is solved. Specifically, the proposed intelligent control panel can start and stop the vibration motor and adjust its vibration frequency, and at the same time control the working state of the water pump, supply water to the installation water tank through the water pipe, drive the nozzle to evenly spray cooling water to the screening area, effectively reduce the material temperature, and ensure the stability of the material quality during the screening process. In addition, the present invention also proposes to dynamically adjust the speed of the vibration motor and the flow rate of the water pump through the PID control algorithm to adapt to the changes in material properties and environmental conditions, improve the screening efficiency and the quality of material processing, not only reduce the labor intensity of manual labor, but also significantly improve the automation level and output rate of plastic particle production, ensure the quality of the product, and meet the needs of modern plastic particle production for efficient, stable and intelligent equipment.

[0025] During specific implementation, it includes a support leg 1, a screening cooling component 7 and an intelligent control panel 6, wherein a buffer spring 2 is fixedly installed on the top of the support leg 1, and the buffer spring 2 is fixedly installed on the screening frame 3 through a mounting plate; a support column 4 is fixedly installed on the side of the screening frame 3, and a vibration motor 5 is fixedly installed on the top of the support column 4; the output end of the vibration motor 5 is provided with a vibration shaft that is movable through the outer wall of one side of the screening frame 3 and extends to the inside of the screening frame 3, and the outer wall of the vibration shaft is provided with a connecting column 51 arranged inside the screening frame 3; the screening cooling component 7 is arranged above the screening frame 3, including a cooling part 73, and the cooling part 73 includes a protective cover 731, which is fixedly installed on the top of the screening frame 3; a cooling water tank 732 is fixedly installed on the protective cover The top of the cooling water tank 732 is connected with a supplementary pipe 733, the water pump 734 is connected with the cooling water tank 732 through a water pipe 735, the other end of the water pipe 735 is connected with the installation water tank 736 through a connecting hose 737, and the bottom of the installation water tank 736 is evenly connected with nozzles 738; the intelligent control panel 6 is fixedly arranged on the outer edge of the screening frame 3, and is used to control the start, stop and adjust the vibration frequency of the vibration motor 5, as well as control the working state of the water pump 734, supply water to the installation water tank 736 through the water pipe 735, and control the nozzle 738 to evenly spray cooling water to the screening area, so as to reduce the material temperature and ensure the stable quality of the material during the screening process.

[0026] In one embodiment of the present invention, the screening and cooling assembly 7 also includes a feed screening part 1, wherein the feed screening part 71 includes a feed hopper 711 and a material guide inclined plate 712, the feed hopper 711 is fixedly installed on the top of the screening frame 3, the inner wall of the feed hopper 711 is fixedly installed with a material guide inclined plate 712, and a filter plate 713 is arranged below the material guide inclined plate 712 for preliminary screening of materials, removing large impurities, and ensuring uniform distribution of materials, and a support seat 714 is fixedly installed on the outer wall of the feed hopper 711. A rotating motor 715 is fixedly installed on the top of the support seat 714, and a rotating shaft 716 is provided at the output end of the rotating motor 715. The rotating shaft 716 movably penetrates the outer wall of one side of the feed hopper 711 and extends to the interior of the feed hopper 711. A V-shaped material control plate 717 is sleeved on the outer wall of the rotating shaft 716 for controlling the falling speed and amount of the material to meet different screening requirements; a sieve plate 718 is provided below the feed hopper 711, and the sieve plate 718 is arranged on the inner wall of the screening frame 3 through a fixed plate, and a discharge guide plate 719 is fixedly installed on the outer wall of one side of the sieve plate 718, and a sieve hole 7110 is provided below the sieve plate 718. The sieve holes 7110 are evenly and equidistantly arranged at the bottom of the inner wall of the screening frame 3, and a discharge hopper 7111 is provided below the sieve hole 7110 for separating qualified and unqualified particles.

[0027] In one embodiment of the present invention, the screening and cooling assembly 7 further includes a pushing portion 72, wherein the pushing portion 72 includes a slide 721 and a slide rail 722, the slide 721 is provided on the outer wall of the screening frame 3, the slide rail 722 is fixedly mounted on the top of the screening frame 3, and the outer wall of the slide rail 722 is slidably connected with a U-shaped sliding plate 723 for dynamically adjusting the pushing position and force to adapt to different materials and screening requirements, the U-shaped sliding plate 723 extends to the inside of the slide 721, and a connecting plate 724 is fixedly mounted between the two ends of the U-shaped sliding plate 723. An electric telescopic rod 725 is fixedly mounted on the top of the inner wall of the U-shaped sliding plate 723, and a pushing plate 726 is fixedly mounted on the bottom of the electric telescopic rod 725, the pushing plate 726 is located above the sieve plate 718, and the electric telescopic rod 725 is used to push the pushing plate 726 to push the material to promote the separation between particles and improve the screening efficiency.

[0028] In one embodiment of the present invention, the specific steps of the intelligent control panel 6 controlling the start, stop and adjustment of the vibration frequency of the vibration motor 5 and controlling the working state of the water pump 734 are as follows:

[0029] S1. System startup and self-test. Power-on self-test: When the vibration screening device is powered on, the intelligent control panel 6 first performs a self-test to check the status of all sensors, actuators and communication lines in the vibration screening device; self-test result display: The self-test result is displayed through the intelligent control panel 6 to ensure that the operator can confirm whether the system is ready.

[0030] Based on the above technical concept, it should be noted that when the system is started and self-checked, the process of powering on the vibration motor 5 for self-checking is as follows: after the vibration motor 5 receives the self-checking enable signal sent by the intelligent control panel 6, it starts to perform self-checking, wherein:

[0031] The intelligent control panel 6 detects the vibration frequency of the vibration motor 5 during the self-test period through the built-in sensor or the connected external sensor using the following formula: Where f is the vibration frequency in Hz, v is the vibration speed of the vibration motor 5 during the self-test period in m / s, d is the vibration distance in m, and at the same time, through the formula Detect the vibration amplitude of the vibration motor 5 during the self-test period, where A is the vibration amplitude in m, F is the force in N, M is the mass of the vibration motor 5 in kg, and w is the angular frequency of the vibration motor 5 in rad / s;

[0032] According to the preset minimum vibration frequency f of the vibration motor 5 min =50HZ, and the maximum vibration frequency f max =60HZ, compare with the detected vibration frequency and amplitude, if the vibration frequency f is within f min and f max If the self-test of the vibration motor 5 is between 0 and 1, the self-test of the vibration motor 5 is passed, otherwise it is considered that the self-test has failed and an error prompt is given.

[0033] The process of power-on self-test of water pump 734 is as follows: first, start water pump 734, and the intelligent control panel 6 reads its current sampling value Vi through the built-in sensor or the connected external sensor, calculates the actual output current value I=Vi / r, and synchronously reads the flow value Flow1 of water pump 734; secondly, judge according to the current value I and the flow value Flow1, if I<250mA, then record the abnormal operation of water pump 734; if I>350mA and Flow1<0.55L / min, then record the abnormal flow rate of water pump 734; if I>350mA and Flow1>0.65L / min, it is considered that water pump 734 has passed the self-test; finally, the results of power-on self-test of vibration motor 5 and power-on self-test of water pump 734 are displayed to the operator through intelligent control panel 6, and the results of self-test include at least the status of all inspection items and any abnormal information; if all self-tests are passed, the intelligent control panel 6 displays "system is ready"; otherwise, if there is an abnormality, the specific error message and recommended operation steps are displayed.

[0034] S2. Feeding and preliminary screening control. Feeding control: the material enters the feed hopper 711, the intelligent control panel 6 adjusts the speed of the rotating motor 715, and controls the falling speed of the material through the V-shaped material control plate 717 to ensure uniform distribution of the material; preliminary screening: the material is preliminarily screened through the material guide inclined plate 712 and the filter plate 713 to remove large impurities.

[0035] S3, screening and cooling control. Screening control: the material falls on the screening plate 718, and the intelligent control panel 6 adjusts the speed of the vibration motor according to the material characteristics to optimize the screening efficiency; cooling system start: start the water pump 734, and transport the cooling water to the installation water tank 736 through the water pipe 735 and the connecting hose 737, and the nozzle 738 evenly sprays it to the screening area to reduce the material temperature.

[0036] Based on the above technical concept, it should be noted that the material properties at least include the size range and distribution of the particles in the material, as well as the humidity or water content of the material. If the humidity of the material is high, the intelligent control panel 6 needs to increase the vibration amplitude of the vibration motor and control the water pump 734 to lower the material temperature to prevent blockage. If the material particle size is large, the vibration frequency needs to be adjusted to promote the screening of larger particles.

[0037] S4. Dynamic adjustment and optimization. Real-time monitoring: The intelligent control panel 6 monitors the temperature and humidity of the material and the working status of the vibration motor in real time; Dynamic adjustment: According to the monitoring data, the intelligent control panel 6 dynamically adjusts the speed of the vibration motor and the flow rate of the water pump to keep the material in a suitable state for screening and cooling.

[0038] Based on the above technical concept, it should be noted that in step S4, the optimization steps for the intelligent control panel 6 to dynamically adjust the speed of the vibration motor and the flow rate of the water pump are as follows: first, initialize the PID parameters and set the proportional coefficient K P , integration time constant T i and the differential time constant T d The initial value of

[0039] Secondly, calculate the current vibration frequency f of the vibration motor 5 and the preset target frequency f tar The error between err (t),

[0040] P err (t) = f tar -f(3)

[0041] Synchronously calculate the flow value Flow1 of the water pump (734) and the preset target flow value Flow1 tar The error F err (t),

[0042] F err(t) = Flow1 tar -Flow1 (4)

[0043] Again, for the vibration motor, apply the PID control algorithm to adjust the speed:

[0044]

[0045] Where Control_Psre(t) is the control output signal issued when the intelligent control panel 6 adjusts the vibration motor 5 of the controlled object at time t, K P is the proportional coefficient, which determines the influence of the error on the control output signal, T i is the integral time constant, which determines the influence of error accumulation on the control output signal, T d is the differential time constant, which determines the influence of the error change rate on the control output signal. It can be understood that through this formula, the speed of the vibration motor can be dynamically adjusted according to the error between the actual vibration frequency of the vibration motor and the target frequency to reduce the error and achieve the expected vibration frequency.

[0046] For water pump 734, the PID control algorithm is applied to adjust the flow rate:

[0047]

[0048] Where Control_Psre(t) is the control output signal issued by the intelligent control panel 6 when adjusting the controlled object water pump at time t, is an integral term, which is used to accumulate the impact of past errors to eliminate or reduce steady-state errors. It is a differential term, which is used to predict the future trend of the error to improve the response speed and stability of the system;

[0049] Finally, the proportional coefficient K is dynamically adjusted according to the output result of Control_Psre(t) P , integration time constant T i , differential time constant T d The initial value and error are used to achieve stable control of the speed of the vibration motor and the flow rate of the water pump.

[0050] S5, system shutdown and safety check. Pre-shutdown check: before the vibration screening device is ready to be powered off, the intelligent control panel 6 reads the actual operating parameters again to determine whether the operation termination conditions of the intelligent control panel 6 are met; safe shutdown: if the conditions are met, the intelligent control panel 6 will gradually reduce the operating frequency of the vibration motor and the water pump until it is safely shut down. Otherwise, the intelligent control panel 6 configures the shutdown delay time of the vibration motor 5 and the water pump 734 according to the actual operating parameters read twice, and shuts down after the operation is completed.

[0051] Based on the above technical concept, it should be noted that in step S5, the shutdown delay configuration relationship of the vibration motor 5 is:

[0052] Where, t is the shutdown delay time, in minutes, and 0 means immediate shutdown;

[0053] The shutdown delay configuration relationship of the water pump (734) is: Where, t is the shutdown delay time in minutes, and 0 means immediate shutdown.

[0054] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An intelligent vibration screening device for plastic particle processing, characterized in that: include Support legs (1), screening and cooling components (7) and intelligent control panel (6), wherein: A buffer spring (2) is fixedly mounted on the top of the support leg (1), and the buffer spring (2) is fixedly mounted on the screening frame (3) through a mounting plate; a support column (4) is fixedly mounted on the side of the screening frame (3), and a vibration motor (5) is fixedly mounted on the top of the support column (4); a vibration shaft that movably penetrates the outer wall of one side of the screening frame (3) and extends to the inside of the screening frame (3) is provided at the output end of the vibration motor (5), and the outer wall of the vibration shaft is sleeved with a connecting column (51) that is arranged inside the screening frame (3); The screening cooling assembly (7) is disposed above the screening frame (3) and includes a cooling portion (73). The cooling portion (73) includes: A protective cover (731) is fixedly mounted on the top of the screening frame (3); a cooling water tank (732) is fixedly mounted on the top of the protective cover (731), and a water pump (734) is provided inside the cooling water tank (732); the water pump (734) is connected to the cooling water tank (732) through a water pipe (735); the other end of the water pipe (735) is connected to an installation water tank (736) through a connecting hose (737); and nozzles (738) are evenly and equidistantly provided at the bottom of the installation water tank (736); The intelligent control panel (6) is fixedly mounted on the outer edge of the screening frame (3) and is used to control the start and stop of the vibration motor (5) and adjust the vibration frequency, as well as control the working state of the water pump (734), supply water to the installation water tank (736) through the water pipe (735), and control the nozzle (738) to evenly spray cooling water to the screening area, thereby reducing the material temperature and ensuring the stability of the quality of the material during the screening process.

2. The intelligent vibration screening device for plastic particle processing according to claim 1, characterized in that: The specific steps of the intelligent control panel (6) controlling the start, stop and adjustment of the vibration frequency of the vibration motor (5) and controlling the working state of the water pump (734) are as follows: S1. System startup and self-test Power-on self-check: When the vibration screening device is powered on, the intelligent control panel (6) first performs a self-check to check the status of all sensors, actuators and communication lines in the vibration screening device; Self-test result display: The self-test result is displayed through the intelligent control panel (6), ensuring that the operator can confirm whether the system is ready; S2. Feeding and preliminary screening control Feed control: When the material enters the feed hopper (711), the intelligent control panel (6) adjusts the speed of the rotating motor (715) and controls the falling speed of the material through the V-shaped material control plate (717) to ensure that the material is evenly distributed; Preliminary screening: The material is preliminarily screened through the guide inclined plate (712) and the filter plate (713) to remove large impurities; S3, Screening and Cooling Control Screening control: When the material falls on the screening plate (718), the intelligent control panel (6) adjusts the speed of the vibration motor according to the material characteristics to optimize the screening efficiency; Cooling system start-up: start the water pump (734), deliver cooling water to the installation water tank (736) through the water pipe (735) and the connecting hose (737), and the nozzle (738) evenly sprays the water to the screening area to reduce the material temperature; S4. Dynamic adjustment and optimization Real-time monitoring: The intelligent control panel (6) monitors the temperature and humidity of the material, as well as the working status of the vibration motor in real time; Dynamic adjustment: Based on the monitoring data, the intelligent control panel (6) dynamically adjusts the speed of the vibration motor and the flow rate of the water pump to keep the material in a suitable state for screening and cooling; S5. System shutdown and safety check Pre-shutdown inspection: before the vibration screening device is ready to be powered off, the intelligent control panel (6) reads the actual operating parameters again to determine whether the operation termination conditions of the intelligent control panel (6) are met; Safety shutdown: If the conditions are met, the intelligent control panel (6) will gradually reduce the operating frequency of the vibration motor and the water pump until a safe shutdown occurs. Otherwise, the intelligent control panel (6) will configure the shutdown delay time of the vibration motor (5) and the water pump (734) according to the actual operating parameters read twice, and shut down after the operation is completed.

3. The intelligent vibration screening device for plastic particle processing according to claim 2, characterized in that: In step S1, when the system is started and self-checked, the process of powering on the vibration motor (5) and self-checking is as follows: After receiving the self-test enable signal from the intelligent control panel (6), the vibration motor (5) starts to perform a self-test, wherein: The intelligent control panel (6) detects the vibration frequency of the vibration motor (5) during the self-test period through the built-in sensor or the connected external sensor using the following formula: Where f is the vibration frequency in Hz, v is the vibration speed of the vibration motor (5) during the self-test in m / s, d is the vibration distance in m, and Detect the vibration amplitude of the vibration motor (5) during the self-test period, where A is the vibration amplitude, in m, F is the force, in N, M is the mass of the vibration motor (5), in kg, and w is the angular frequency of the vibration motor (5), in rad / s; According to the preset minimum vibration frequency f of the vibration motor (5) min =50HZ, and the maximum vibration frequency f max =60HZ, compare with the detected vibration frequency and amplitude, if the vibration frequency f is within f min and f max If the vibration motor (5) passes the self-test, it is considered that the self-test fails and an error prompt is given; The process of powering on the water pump (734) for self-testing is as follows: First, the water pump (734) is started, and the intelligent control panel (6) reads the current sampling value Vi through the built-in sensor or the connected external sensor, calculates the actual output current value I=Vi / r, and simultaneously reads the flow value Flow1 of the water pump (734). Secondly, a judgment is made based on the current value I and the flow value Flow1. If I<250mA, it is recorded that the water pump (734) is operating abnormally. If I>350mA and Flow1<0.55L / min, it is recorded that the flow rate of the water pump (734) is abnormal. If I>350mA and Flow1>0.65L / min, it is considered that the water pump (734) has passed the self-test. Finally, the results of the power-on self-test of the vibration motor (5) and the power-on self-test of the water pump (734) are displayed to the operator through the intelligent control panel (6). The results of the self-test at least include the status of all inspection items and any abnormal information. If all self-tests pass, the intelligent control panel (6) displays "system is ready"; otherwise, if there is an abnormality, a specific error message and recommended operating steps are displayed.

4. The intelligent vibration screening device for plastic particle processing according to claim 2, characterized in that: In step S3, the material characteristics at least include the size range and distribution of particles in the material, and the humidity or water content of the material. If the humidity of the material is high, the intelligent control panel (6) needs to increase the vibration amplitude of the vibration motor and control the water pump (734) to reduce the material temperature to prevent clogging. If the material particle size is large, the vibration frequency needs to be adjusted to facilitate the screening of larger particles.

5. The intelligent vibration screening device for plastic particle processing according to claim 2, characterized in that: In step S4, the optimization steps for the intelligent control panel (6) to dynamically adjust the speed of the vibration motor and the flow rate of the water pump are as follows: First, initialize the PID parameters and set the proportional coefficient K P , integration time constant T i and the differential time constant T d The initial value of Secondly, calculate the current vibration frequency f of the vibration motor (5) and the preset target frequency f tar The error between err (t), P err (t) = f tar -f Synchronously calculate the flow value Flow1 of the water pump (734) and the preset target flow value Flow1 tar The error F err (t), F err (t)=Flow1 tar -Flow1 Again, for the vibration motor, apply the PID control algorithm to adjust the speed: Where Control_Psre(t) is the control output signal issued by the intelligent control panel (6) when adjusting the vibration motor (5) of the controlled object at time t, and K P is the proportional coefficient, which determines the influence of the error on the control output signal, T i is the integral time constant, which determines the influence of error accumulation on the control output signal, T d is the differential time constant, which determines the effect of the error change rate on the control output signal; For the water pump (734), a PID control algorithm is applied to adjust the flow rate: Wherein, Control_Psre(t) is the control output signal issued when the intelligent control panel (6) adjusts the controlled object water pump (734) at time t, is an integral term, which is used to accumulate the impact of past errors to eliminate or reduce steady-state errors. It is a differential term, which is used to predict the future trend of the error to improve the response speed and stability of the system; Finally, the proportional coefficient K is dynamically adjusted according to the output result of Control_Psre(t) P , integration time constant T i , differential time constant T d The initial value and error are used to achieve stable control of the speed of the vibration motor and the flow rate of the water pump.

6. The intelligent vibration screening device for plastic particle processing according to claim 2, characterized in that: In step S5, the shutdown delay configuration relationship of the vibration motor (5) is: Where, t is the shutdown delay time, in minutes, and 0 means immediate shutdown; The shutdown delay configuration relationship of the water pump (734) is: Where, t is the shutdown delay time in minutes, and 0 means immediate shutdown.

7. The intelligent vibration screening device for plastic particle processing according to claim 1, characterized in that: The screening and cooling assembly (7) further comprises a feed screening part (71), wherein the feed screening part (71) comprises a feed hopper (711) and a material guide inclined plate (712), wherein the feed hopper (711) is fixedly mounted on the top of the screening frame (3), the material guide inclined plate (712) is fixedly mounted on the inner wall of the feed hopper (711), and a filter plate (713) is arranged below the material guide inclined plate (712) for preliminary screening of materials, removing large impurities, and ensuring uniform distribution of materials, and a support seat (714) is fixedly mounted on the outer wall of the feed hopper (711).

8. The intelligent vibration screening device for plastic particle processing according to claim 7, characterized in that: A rotating motor (715) is fixedly mounted on the top of the support seat (714), and a rotating shaft (716) is provided at the output end of the rotating motor (715). The rotating shaft (716) movably penetrates an outer wall of one side of the feed hopper (711) and extends to the inside of the feed hopper (711). A V-shaped material control plate (717) is sleeved on the outer wall of the rotating shaft (716) for controlling the falling speed and amount of the material to meet different screening requirements; A sieve plate (718) is provided below the feed hopper (711), and the sieve plate (718) is provided on the inner wall of the screening frame (3) through a fixing plate, and a discharge guide plate (719) is fixedly installed on the outer wall of one side of the sieve plate (718), and sieve holes (7110) are provided below the sieve plate (718), and the sieve holes (7110) are evenly and equidistantly arranged at the bottom of the inner wall of the screening frame (3), and a discharge hopper (7111) is provided below the sieve holes (7110) for separating qualified particles from unqualified particles.

9. The intelligent vibration screening device for plastic particle processing according to claim 1, characterized in that: The screening cooling assembly (7) further comprises a pushing portion (72), wherein the pushing portion (72) comprises a slide groove (721) and a slide rail (722), the slide groove (721) being arranged on the outer wall of the screening frame (3), the slide rail (722) being fixedly mounted on the top of the screening frame (3), the outer wall of the slide rail (722) being slidably connected with a U-shaped sliding plate (723) for dynamically adjusting the pushing position and force to adapt to different materials and screening requirements, the U-shaped sliding plate (723) extending to the interior of the slide groove (721), and a connecting plate (724) being fixedly mounted between the two ends of the U-shaped sliding plate (723).

10. The intelligent vibration screening device for plastic particle processing according to claim 9, characterized in that: An electric telescopic rod (725) is fixedly installed on the top of the inner wall of the U-shaped sliding plate (723), and a pushing plate (726) is fixedly installed on the bottom of the electric telescopic rod (725). The pushing plate (726) is located above the sieve plate (718). The electric telescopic rod (725) is used to push the pushing plate (726) to push the material to promote separation between particles and improve screening efficiency.

Images