Multi-rocking sieve matrix arrangement method for reducing vibration effect

Abstract

The invention relates to the technical field of industrial building construction, aims to solve the problems of large vibration superposition effect, unbalanced torque and low economical efficiency existing in concentrated arrangement of a plurality of swinging sieves in the prior art, and provides a matrix arrangement method for a plurality of swinging sieves capable of reducing the vibration effect, which comprises the following steps: S1, preparing an even number of swinging sieves, taking two swinging sieves as a group, and arranging a plurality of swinging sieves; the two swinging sieves in the same group are arranged in a positive and negative rotation mode, namely the two swinging sieves are opposite in rotating direction; s2, arranging a plurality of swinging screen groups on a supporting plane to form a single-row layout or a row-row matrix layout; for a single-row layout and a row-row matrix layout, each row comprises a plurality of swinging screen groups, and two adjacent swinging screen groups in each row are opposite in turning direction; for the row-column matrix type layout, two corresponding swinging screen groups in two adjacent columns are reversed in turning direction; s3, two swinging screens in each swinging screen group are controlled to start and stop synchronously, and intra-group synchronization is achieved; the two swinging sieves in the same group are arranged in a positive and negative rotation mode, so that self-counteracting of the vibration effect can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial building construction, and in particular to a method for arranging a plurality of swing screens in a matrix for reducing vibration effects. Background Art

[0002] A swing screen is a type of dynamic vibrating equipment driven by a central shaft. Its core components include a screen box, drive motor, eccentric weight, and support spring. Driven by the centrifugal force generated by the eccentric weight, the screen box performs approximately uniform circular motion with a small arc (typically with an oscillation angle of 3°-5°) around the central shaft. Its rated speed is 200-300 rpm, with a rotation frequency of 3-5 Hz. Its primary function is to screen, grade, and remove impurities from granular materials, offering advantages such as high screening efficiency, excellent material flowability, and low equipment wear.

[0003] Oscillating screens are typically used for screening ultra-fine materials (<1mm), and their processing capacity is limited per unit. In mining and concentrating plants, they are used for iron ore particle size classification; in chemical plants, they are used for screening catalyst particles; and in the building materials industry, they are used for cleaning and grading sand and gravel aggregates. However, with the expansion of production scale, the centralized deployment of multiple oscillating screens has become the norm, and the structural safety issues caused by the cumulative vibration effect have become increasingly prominent.

[0004] For a single swing screen, when it is working normally, its forces include: Radial horizontal force Fhn: caused by the circular motion of the screen box, the direction is perpendicular to the centering axis; Vertical force Fz: equipment deadweight and material load; During startup / shutdown, the forces acting on it include: Radial horizontal force Fhn: caused by the circular motion of the screen box, the direction is perpendicular to the centering axis; Tangential inertia force Fhr: generated during the start-stop process due to acceleration changes, and its direction is tangential to the motion trajectory; Vertical force Fz: equipment deadweight and material load.

[0005] The moment M around the centering axis is caused by the tangential inertia force Fhr.

[0006] It can be seen from this that when a single swing screen is started / shutdown, the tangential inertia force Fhr causes a torque M, and the dynamic load of a single device is complex.

[0007] When multiple swing screens are centrally arranged, the horizontal force and moment will have a superposition effect: Horizontal force superposition: When arranged in a single row, if the equipment rotates in the same direction, the horizontal force is linearly proportional to the number of equipment (for example, the combined force of four equipment can reach four times that of a single equipment); Peak moment: When arranged in reverse, the moment forms a maximum value at the center of the axis, which may exceed the bending bearing capacity of the structure.

[0008] When the vibration frequencies of multiple devices are close to the natural frequency of the structure, resonance will occur. The resonance effect will amplify the dynamic load by 2-3 times, seriously threatening the safety of the structure.

[0009] Traditional solutions cope with loads by increasing structural stiffness (such as increasing cross-sectional size or using high-strength materials), but this leads to material waste and increased costs.

[0010] Therefore, the problems existing in the centralized arrangement of multiple swing screens in the prior art are as follows: 1. Vibration superposition effect: In traditional single-row arrangements, the horizontal forces on multiple devices are in the same direction, and the resultant external force increases linearly with the number of devices. For example, when eight devices are arranged in a single row, the resultant horizontal force can reach eight times that of a single device (F total = 8Fhn ), requiring the support structure to have extremely high lateral stiffness. 2. Torque imbalance: When the equipment is arranged in reverse, the torque reaches a maximum value at the center of the axis, accelerating the generation of local fatigue cracks in the structure.

[0011] 3. Resonance risk: If the vibration frequency generated by the operation of multiple devices is close to the natural frequency of the supporting structure, it may trigger a resonance effect, amplifying the dynamic load by 2-3 times.

[0012] 4. Insufficient economy: Traditional solutions rely on increasing the size of the structure, which results in a 20%-40% increase in construction costs and an extension of the construction period by more than 30%.

[0013] Some factories try to alleviate vibration problems by adding dampers or vibration isolation foundations, but there are the following drawbacks: 1. The damper requires regular maintenance, which increases operating costs; 2. The vibration isolation foundation takes up a large space and has limited effect on low-frequency vibration; 3. It is impossible to fundamentally eliminate the superposition effect of horizontal force and moment. Summary of the Invention

[0014] The present invention aims to provide a matrix arrangement method for multiple rocking screens with reduced vibration effects, so as to solve the problems of large vibration superposition effect, unbalanced torque and low economy existing in the prior art when multiple rocking screens are arranged in a centralized manner.

[0015] The present invention is achieved by adopting the following technical solutions: The present invention provides a method for arranging a plurality of swing screens in a matrix to reduce vibration effects, comprising the following steps: S1: Prepare an even number of swing screens, with two swing screens as a group, and arrange the two swing screens in the same group in a forward and reverse direction, that is, the two swing screens rotate in opposite directions; S2: Arrange multiple swing screen groups on a supporting plane to form a single row layout or a row and column matrix layout; For single-row layout and row-column matrix layout, each column includes multiple swing screen groups, and the two adjacent swing screen groups in each column rotate in opposite directions; For the row-column matrix layout, the corresponding two swing screen groups in two adjacent columns rotate in opposite directions; S3: Control the two swing screens in each swing screen group to start and stop synchronously to achieve synchronization within the group.

[0016] The present invention's matrix arrangement method for reducing vibration effects on multiple vibrating screens can minimize the impact of vibration on supporting structure loads. This method is particularly suitable for large-scale production scenarios in industries such as mining, metallurgy, chemicals, and building materials, where multiple vibrating screens are required to work together. Through scientific layout and synchronous control strategies, the dynamic loads of equipment vibration on building structures can be effectively reduced, thereby reducing structural design redundancy and saving construction costs. Furthermore, the present invention can also be extended to other deployment scenarios for similar vibrating equipment, such as centrifuges and vibrating conveyors, and has broad application prospects.

[0017] As the preferred technical solution: The horizontal forces on the two swing screens in the same group are in opposite directions, and the resultant force is:

[0018] .

[0019] As the preferred technical solution: The distance between two swing screens in the same group is d, and the torque of a single swing screen in the shutdown and startup states is , the combined moment of the two swing screens in the same group is: .

[0020] As the preferred technical solution: The swing screen is connected to the PLC control system, and the two swing screens in each swing screen group are controlled to start and stop synchronously through the PLC control system.

[0021] As the preferred technical solution: An encoder is installed on the motor shaft of the swing screen, which is connected to the control system. The encoder feeds back the motor speed to the control system in real time to dynamically adjust the motor output.

[0022] As the preferred technical solution: Control the synchronous start and stop of two adjacent swing screen groups in each column to achieve synchronization of adjacent swing screen groups.

[0023] As the preferred technical solution: Two adjacent swing screen groups can also be started asynchronously.

[0024] As the preferred technical solution: The swing screen is connected to a distributed control system, which is used to perform timing control on each swing screen group. The distributed control system has a built-in vibration monitoring module. When the vibration monitoring module detects abnormal vibration of a swing screen group, the vibration monitoring module sends a signal to the distributed control system, and the distributed control system automatically adjusts the start and stop timing of the swing screen group to achieve dynamic balance.

[0025] As the preferred technical solution: The PLC control system is used to control the start and stop of the swing screen. When the swing screen is working normally, it works at a fixed rated swing frequency. Therefore, under normal working conditions, controlling its start and stop can achieve forward and reverse rotation.

[0026] The distributed control system can perform timing control on each swing screen group. Specifically, when an accident occurs on one of the swing screens in a swing screen group, the vibration monitoring module can be used to detect whether it is operating at the predetermined swing frequency. If there is an abnormality (for example, it deviates from the swing frequency), the two swing screens in the swing screen group need to be shut down at the same time for maintenance. After the equipment is repaired, it can be opened at the same time. The distributed control system can shut down the two swing screens in the swing screen group at the same time according to the received abnormal signal and adjust the start and stop timing of the swing screen group.

[0027] As the preferred technical solution: Emergency measures for swing screen operation include: The swing screen is equipped with a backup power supply, which starts within 10 seconds before the power is cut off. The swing screen is controlled to shut down in sequence through the PLC control system, so that the multiple swing screen groups in each column start to shut down from the swing screen groups at both ends of the column, and then gradually shut down the swing screen groups in the middle symmetrically.

[0028] As the preferred technical solution: The backup power supply can be a diesel generator.

[0029] As the preferred technical solution: The start-up time difference between the two swing screens in each swing screen group is ≤2 seconds, and the start-stop time difference between two adjacent swing screen groups is ≤2 seconds; The downtime interval of the two swing screen groups is 2s.

[0030] As the preferred technical solution: Emergency measures also include: A torque sensor is installed on the swing screen to monitor torque changes in real time. The torque sensor is connected to a distributed control system. The distributed control system is responsible for collecting sensor signals in real time and converting them into digital signals for processing and analysis. When the torque value is monitored to be out of the normal range or the torque change rate is abnormal, the system determines it as an abnormality and immediately sends a control signal to trigger the start of the backup brake to slow down or stop the swing screen.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The present invention realizes self-offsetting of vibration effects through matrix arrangement and synchronous control strategy; the present invention arranges two swing screens in the same group in forward and reverse directions so that the two swing screens have opposite directions and the same rotation speed, so that the resultant horizontal force of the two swing screens is zero, the moments cancel each other out, and mechanical balance and vibration cancellation are achieved within the group; the present invention arranges adjacent swing screen groups in reverse directions and arranges multiple rows to achieve global moment balance, mechanical balance and vibration cancellation between groups; in terms of overall effect, the supporting structure (supporting plane) only bears vertical loads, and the horizontal force and moment requirements are reduced by more than 90%.

[0032] Since the present invention achieves vibration offset, it can further achieve structural optimization and economic improvement. The supporting structure mainly bears the vertical force Fz, the demand for horizontal stiffness and lateral stiffness is reduced by 90%, and the steel consumption is reduced by 25%-30%, which can save materials; due to the simplified structure, the construction period is shortened by 15%-20%, thereby improving construction efficiency; after eliminating the resonance risk, the maintenance frequency of equipment and structure is reduced by 50%, and the average annual maintenance cost is reduced by 80,000 to 120,000 yuan, thereby reducing operation and maintenance costs; the stiffness of the supporting structure of the present invention is reduced, so that the natural frequency fs of the supporting structure is far away from the frequency fd of the swing screen, ensuring that the natural frequency fs of the structure and the frequency fd of the equipment meet the following conditions: Fs / fd is approximately equal to 0.65-1.4, thereby avoiding the resonance risk.

[0033] The present invention is suitable for deployment scenarios with 2 to dozens of devices. Through flexible adjustment of grouping rules and synchronization strategies (such as 4 groups × 2 devices, 6 groups × 2 devices, etc.), it can adapt to different production scales and achieve scale expansion. It can be combined with an intelligent operation and maintenance system to realize real-time monitoring and predictive maintenance of vibration data, achieving technical compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a flow chart of the method for arranging a matrix of multiple rocking screens to reduce vibration effects as described in the present invention.

[0035] Figure 2 This is a schematic diagram of the normal working load of two swing screens.

[0036] Figure 3 The following is a load diagram of two swing screens in shutdown and startup states.

[0037] Figure 4 This is a schematic diagram of the single row arrangement of 8 swing screens.

[0038] Figure 5 This is a schematic diagram of the multi-row layout of 8 swing screens. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] Example 1 like Figure 1 As shown, this embodiment proposes a method for arranging multiple swing screens in a matrix to reduce vibration effects, comprising the following steps: S1: Prepare an even number of swing screens, with two swing screens as a group, and arrange the two swing screens in the same group in forward and reverse directions, that is, the two swing screens rotate in opposite directions (180° apart). The two swing screens in the same group have the same speed to facilitate start and stop control; Figure 2 and Figure 3 As shown in the figure, when two swing screens are working normally, the horizontal forces (Fhn or Fhr) of the two swing screens in the same group are in opposite directions and the resultant force is zero; The horizontal forces on the two swing screens in the same group are in opposite directions, and the resultant force is:

[0041]

[0042] The distance between two swing screens in the same group is d, and the torque of a single swing screen in the shutdown and startup states is , the combined moment of the two swing screens in the same group is:

[0043] Tangential inertia force at shutdown The direction is opposite to that at startup.

[0044] S2: Arrange multiple swing screen groups on a supporting plane to form a single row layout or a row and column matrix layout; For single-row layout and row-column matrix layout, each column includes multiple swing screen groups, and the two adjacent swing screen groups in each column rotate in opposite directions. For example, the two swing screens in group 1 in the column are a clockwise + counterclockwise combination, and the two swing screens in group 2 are a counterclockwise + clockwise combination, and so on. This can eliminate the torque superposition on the axis of a single column (Mtotal = Mr + (−Mr) = 0) and eliminate the torque superposition in the operating plane of the swing screen, such as Figure 4 As shown; For the row-column matrix layout, the corresponding two swing screen groups in two adjacent columns rotate in opposite directions. For example, the two swing screens in group 1 of column 1 rotate in clockwise + counterclockwise combination, the two swing screens in group 1 of column 2 rotate in counterclockwise + clockwise combination, the two swing screens in group 1 of column 3 rotate in clockwise + counterclockwise combination, and so on. Through the symmetrical layout of the row-column matrix, the moment balance and horizontal force balance in three-dimensional space can be achieved, and the resultant moment approaches zero, such as Figure 5 As shown; S3: Control the synchronous start and stop of the two swing screens in each swing screen group to achieve intra-group synchronization. The two swing screens in the same group have the same speed but opposite directions. Control the synchronous start and stop of two adjacent swing screen groups in each column to achieve synchronization of adjacent swing screen groups.

[0045] Preferably, the swing screen can be connected to a PLC control system, and the two swing screens in each swing screen group can be controlled to start and stop synchronously by the PLC control system to achieve synchronization within the group; Preferably, the start-up time difference between the two swing screens in the same swing screen group is about ≤ 2 seconds (n / rotation frequency, in seconds) to avoid torque offset due to phase difference; Among them, the phase difference is (n / rotation frequency)*2Π, and the time difference is n / rotation frequency; An encoder is installed on the motor shaft of the swing screen, which is connected to the control system. The motor speed is fed back to the control system through the encoder in real time so that the motor output can be dynamically adjusted.

[0046] Synchronize the start and stop times of two adjacent oscillating screen groups in each row. Ideally, the start-stop time difference between adjacent oscillating screen groups is ≤ 2 seconds (n / rotational frequency, in seconds) to avoid vibration superposition caused by torque phase differences. For example, if group 1 starts within 2 seconds of group 2, the vibration waveforms will be offset. The start-stop time difference between adjacent oscillating screen groups is determined by the rotational speed and the 180-degree rotational direction difference.

[0047] Two adjacent swing screen groups can also be started asynchronously. By limiting the appropriate time difference, the rated phase difference can be achieved. The phase difference between the two swing screens in the same group is 180°, and the phase difference between adjacent swing screen groups is 180°.

[0048] The swing screen is connected to the distributed control system (DCS), and the distributed control system (DCS) is used to control the timing of each swing screen group. The system has a built-in vibration monitoring module. When the vibration monitoring module detects abnormal vibration of a swing screen group, the vibration monitoring module sends a signal to the distributed control system to automatically adjust the start and stop timing of the adjacent swing screen groups. The distributed control system achieves dynamic balance and realizes real-time monitoring and dynamic adjustment of vibration data.

[0049] The PLC control system is used to control the start and stop of the swing screen. When the swing screen is working normally, it works at a fixed rated swing frequency. Therefore, under normal working conditions, controlling its start and stop can achieve forward and reverse rotation.

[0050] The distributed control system can perform timing control on each swing screen group. Specifically, when an accident occurs on one of the swing screens in a swing screen group, the vibration monitoring module can be used to detect whether it is operating at the predetermined swing frequency. If there is an abnormality (for example, it deviates from the swing frequency), the two swing screens in the swing screen group need to be shut down at the same time for maintenance. After the equipment is repaired, it can be opened at the same time. The distributed control system can shut down the two swing screens in the swing screen group at the same time according to the received abnormal signal and adjust the start and stop timing of the swing screen group.

[0051] In addition, the emergency measures include: the factory equips the swing screen with a diesel generator (the power must cover 120% of the total power of all swing screen groups) as a backup power supply, and the backup power supply is started within 10 seconds before the power grid is cut off to ensure that each swing screen group can be shut down in sequence. The swing screen is controlled to shut down in sequence through the PLC control system. Figure 5 In the layout mode, the shutdown order is group 1 → group 4 → group 3 → group 2, with an interval of about 2 seconds (n / rotation frequency, in seconds) to avoid sudden changes in torque caused by the simultaneous shutdown of multiple devices. The direction is opposite to that during startup. Orderly shutdown can offset the additional torque (M=Fhr⋅d) and avoid sudden load changes.

[0052] In the same row, the swing screen groups on both sides are stopped first, and then the swing screen group in the middle is stopped gradually and symmetrically. In this way, the superposition of the combined torque of adjacent swing screen groups can be reduced.

[0053] By installing a torque sensor on the swing screen to monitor the torque change in real time, the torque sensor is connected to the distributed control system. The distributed control system is responsible for collecting the sensor signal in real time and converting it into a digital signal for processing and analysis. The distributed control system collects torque data in real time at a certain sampling frequency (such as 100 times per second) to ensure that the instantaneous change of the torque can be captured in time; the collected torque data is analyzed, including calculating the average value, peak value, change rate and other parameters of the torque. By setting a reasonable threshold, when the monitored torque value exceeds the normal range or the torque change rate is abnormal (such as sudden increase or decrease), the system will judge it as abnormal; using advanced algorithms (such as wavelet transform, neural network, etc.) to analyze the torque The torque signal is subjected to feature extraction and pattern recognition to improve the accuracy of abnormal identification and avoid misjudgment caused by accidental factors. When the distributed control system determines that the torque change is abnormal, it immediately sends a control signal to trigger the start of the backup brake. The backup brake can be an electromagnetic brake, a hydraulic brake or a pneumatic brake. The electromagnetic brake has a fast response speed and is suitable for occasions requiring rapid braking. The hydraulic brake has a large braking torque and is suitable for large swing screens. The pneumatic brake has a simple structure and is easy to maintain. After receiving the control signal, the backup brake quickly starts the braking action and applies braking force to the drive shaft or transmission components of the swing screen through a mechanical device to slow down or stop the swing screen to prevent equipment damage or accidents.

[0054] In this way, real-time monitoring and abnormal braking of the swing screen torque can be achieved, effectively improving the operating safety of the equipment, reducing equipment failures and production accidents caused by abnormal torque, and ensuring the smooth progress of production.

[0055] The present invention realizes self-offsetting of vibration effects through matrix arrangement and synchronous control strategy; the present invention arranges two swing screens in the same group in forward and reverse directions so that the two swing screens have opposite directions and the same rotation speed, so that the resultant horizontal force of the two swing screens is zero, the moments cancel each other out, and mechanical balance and vibration cancellation are achieved within the group; the present invention arranges adjacent swing screen groups in reverse directions and arranges multiple rows to achieve global moment balance, mechanical balance and vibration cancellation between groups; in terms of overall effect, the supporting structure (supporting plane) only bears vertical loads, and the horizontal force and moment requirements are reduced by more than 90%.

[0056] Since the present invention achieves vibration offset, it can further achieve structural optimization and economic improvement. The supporting structure mainly bears the vertical force Fz, the demand for horizontal stiffness and lateral stiffness is reduced by 90%, and the steel consumption is reduced by 25%-30%, which can save materials; due to the simplified structure, the construction period is shortened by 15%-20%, thereby improving construction efficiency; after eliminating the resonance risk, the maintenance frequency of equipment and structure is reduced by 50%, and the average annual maintenance cost is reduced by 80,000 to 120,000 yuan, thereby reducing operation and maintenance costs; the stiffness of the supporting structure of the present invention is reduced, so that the natural frequency fs of the supporting structure is far away from the frequency fd of the swing screen, ensuring that the natural frequency fs of the structure and the frequency fd of the equipment meet the following conditions: Fs / fd is approximately equal to 0.65-1.4, thereby avoiding the resonance risk.

[0057] The present invention is suitable for deployment scenarios with 2 to dozens of devices. Through flexible adjustment of grouping rules and synchronization strategies (such as 4 groups × 2 devices, 6 groups × 2 devices, etc.), it can adapt to different production scales and achieve scale expansion. It can be combined with an intelligent operation and maintenance system to realize real-time monitoring and predictive maintenance of vibration data, achieving technical compatibility.

[0058] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for arranging multiple swing screens in a matrix to reduce vibration effects, characterized by: The following steps are involved: S1: Prepare an even number of swing screens, with two swing screens as a group, and arrange the two swing screens in the same group in forward and reverse directions, that is, the two swing screens rotate in opposite directions; S2: Arrange multiple swing screen groups on a supporting plane to form a single row layout or a row and column matrix layout; For single-row layout and row-column matrix layout, each column includes multiple swing screen groups, and the two adjacent swing screen groups in each column rotate in opposite directions; For the row-column matrix layout, the corresponding two swing screen groups in two adjacent columns rotate in opposite directions; S3: Control the two swing screens in each swing screen group to start and stop synchronously to achieve synchronization within the group.

2. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 1, characterized in that: The horizontal forces on the two swing screens in the same group are in opposite directions, and the resultant force is: 。 3. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 2, characterized in that: The distance between two swing screens in the same group is d, and the torque of a single swing screen in the shutdown and startup states is , the combined moment of the two swing screens in the same group is: 。 4. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 1, characterized in that: The swing screen is connected to the PLC control system, and the two swing screens in each swing screen group are controlled to start and stop synchronously through the PLC control system.

5. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 4, characterized in that: An encoder is installed on the motor shaft of the swing screen, which is connected to the control system. The encoder feeds back the motor speed to the control system in real time to dynamically adjust the motor output.

6. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 4, characterized in that: Control the synchronous start and stop of two adjacent swing screen groups in each column to achieve synchronization of adjacent swing screen groups.

7. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 4, characterized in that: The swing screen is connected to a distributed control system, which is used to perform timing control on each swing screen group. The distributed control system has a built-in vibration monitoring module. When the vibration monitoring module detects abnormal vibration of a swing screen group, the vibration monitoring module sends a signal to the distributed control system, and the distributed control system automatically adjusts the start and stop timing of the swing screen group to achieve dynamic balance.

8. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 6, characterized in that: Emergency measures for swing screen operation include: The swing screen is equipped with a backup power supply, which starts within 10 seconds before the power is cut off. The swing screen is controlled to shut down in sequence through the PLC control system, so that the multiple swing screen groups in each column start to shut down from the swing screen groups at both ends of the column, and then gradually shut down the swing screen groups in the middle symmetrically.

9. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 8, characterized in that: The start-up time difference between the two swing screens in each swing screen group is ≤2 seconds, and the start-stop time difference between two adjacent swing screen groups is ≤2 seconds; The downtime interval of the two swing screen groups is 2s.

10. The method for arranging a plurality of swing screens in a matrix to reduce vibration effects according to claim 8, characterized in that: Emergency measures also include: A torque sensor is installed on the swing screen to monitor torque changes in real time. The torque sensor is connected to a distributed control system. The distributed control system is responsible for collecting sensor signals in real time and converting them into digital signals for processing and analysis. When the torque value is monitored to be out of the normal range or the torque change rate is abnormal, the system determines it as an abnormality and immediately sends a control signal to trigger the start of the backup brake to slow down or stop the swing screen.

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