A combined roller conveyor device and method thereof

Abstract

The present application relates to the field of power battery manufacturing equipment, in particular to a combined roller conveying device and method thereof; comprising a roller conveying assembly, a movable guardrail, a differential pressure self-adaptive floating brush holder and a telescopic dust collection system; a friction-current mapping model and a width-flow resistance compensation model are constructed to quantify dust density and guide the negative pressure setting of the dust collection negative pressure system; the core is to use the pneumatic diaphragm box and the dust collection cavity to form a pure physical feedback loop, when executing reverse differential speed cleaning, according to the negative pressure fluctuation caused by the flow resistance change caused by dust accumulation, the brush contact pressure is automatically adjusted to realize endogenous self-stabilizing balance; the present application effectively solves the problem of efficient dust removal on the surface of the roller in the variable width scene through pneumatic sealing locking and differential cleaning strategy.

Description

Technical Field

[0001] This invention relates to the field of power battery manufacturing equipment, specifically to a combined roller conveyor device and method thereof. Background Technology

[0002] On automated production lines for battery modules, roller conveyor systems are the core equipment for material transfer. As battery module specifications diversify, production lines need to frequently adjust the conveyor width to accommodate materials of different sizes. To ensure the cleanliness of the material surface, cleaning and dust removal devices are usually installed under the rollers to remove dust generated by friction between the material and the rollers, as well as environmental dust.

[0003] However, in existing drum cleaning technologies, when the conveying device adjusts its width to accommodate modules of varying widths, the cleaning components and dust collection chamber often struggle to simultaneously address both size changes and sealing performance. In practical applications, existing technologies, when handling variable-size conveyors, are prone to drastic fluctuations in the negative pressure environment of the dust collection area. This causes a significant decrease in dust extraction efficiency as the conveying width increases, and can even lead to dust leakage from gaps. Furthermore, existing technologies struggle to accurately identify the physical properties of substances adhering to the drum surface. The same cleaning force is typically applied to both hard particles and flexible dust, which can easily cause hard particles to scratch the drum surface or the bottom of the material under the brush drive. In addition, due to the lack of dynamic feedback on cleaning pressure, the contact pressure between the brush and the drum often becomes unstable after prolonged operation, resulting in incomplete cleaning or excessive brush wear, severely impacting the stable operation of the conveying system and the processing quality of the materials.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a combined roller conveyor device and method to solve the problems mentioned in the background art. Specifically, the technical solution of this invention is as follows:

[0006] A combined roller conveyor method, comprising:

[0007] S1. A roller conveyor assembly, a movable guardrail adjustment assembly, a differential pressure adaptive floating brush frame located below the roller, and a telescopic labyrinth accordion dust collection chamber that moves synchronously with the guardrail are provided, and the dust collection chamber is connected to the dust collection negative pressure system.

[0008] S2. Pre-build control models, including a friction-current mapping model relating brush motor current to dust density, and a width-flow resistance compensation model relating guardrail width to negative pressure system speed.

[0009] S3. Execute width adjustment and seal locking: Cut off the negative pressure before widening, and restore the negative pressure to -0.02MPa to -0.05MPa after adjusting to the target width. Use the pressure difference to drive the sealing lip to tightly adhere to the roller.

[0010] S4. Start Conveying and Reverse Cleaning: Drive the roller conveyor while controlling the nylon brush to rotate in the opposite direction to the roller at a linear speed ratio of 1.2:1.

[0011] S5. Perform endogenous self-suppression balance: Utilize the pneumatic diaphragm box to respond to the negative pressure fluctuations in the dust collection chamber and automatically adjust the brush contact pressure to maintain it between 0.1MPa and 0.3MPa.

[0012] Preferably, step S1 includes the following steps prior to:

[0013] S1.1 Configure the sealing lip of the telescopic labyrinth accordion dust collection chamber and the pneumatic diaphragm box, wherein the geometric dimensions of the sealing lip and the elastic coefficient of the pneumatic diaphragm box are determined based on a fluid dynamics simulation model to minimize the edge turbulence of the telescopic labyrinth accordion dust collection chamber under the maximum stretch width and maximize the response sensitivity of the pneumatic diaphragm box.

[0014] Preferably, the differential pressure adaptive floating brush holder includes a floating rocker arm and a pneumatic diaphragm box disposed below the floating rocker arm, wherein in step S5:

[0015] When the frictional resistance between the nylon brush and the roller increases, causing the airflow channel in the cleaning area to narrow, the local negative pressure in the dust collection chamber of the telescopic labyrinth accordion increases, driving the pneumatic diaphragm box to generate an upward suction force, pulling the floating rocker arm to press the nylon brush against the roller.

[0016] When the surface of the roller is clean, resulting in smooth airflow, the negative pressure in the dust collection negative pressure system drops, the suction of the pneumatic membrane box decreases, and the nylon brush reduces the clamping force on the roller.

[0017] Preferably, in step S2, the width-flow resistance compensation model is configured as follows: establishing a functional relationship between the target flow rate of the fan and the real-time width and conveying speed of the movable guardrail adjustment component, wherein the target flow rate of the fan is set to increase with the increase of the real-time width, and gain compensation is performed with the increase of the conveying speed to maintain the effective negative pressure in the dust collection chamber of the telescopic labyrinth accordion cover.

[0018] Preferably, step S4 includes:

[0019] Real-time monitoring of the current signal of the nylon brush drive motor;

[0020] Extract the high-frequency components of the current signal;

[0021] Determine whether the high-frequency component exceeds a preset threshold;

[0022] If the high-frequency component exceeds the preset threshold, it is determined that there are hard particulate dust particles, and the dust collection negative pressure system is controlled to increase the suction power.

[0023] If the high-frequency component does not exceed the preset threshold, it is determined to be normal dust, and the current suction power of the dust collection negative pressure system is maintained.

[0024] Preferably, a lifting divider is further provided between the rollers of the roller conveyor assembly, and step S3 further includes:

[0025] Detect whether the target width is less than a preset narrow spacing threshold;

[0026] If so, the lifting partition bar is raised to form a physical guide channel, and the negative pressure setting value of the dust collection negative pressure system is reduced to -0.01MPa to -0.02MPa;

[0027] If not, the lifting divider bar is kept in its retracted state, and the negative pressure setting of the dust collection negative pressure system is maintained within the standard operating range.

[0028] Preferably, in step S1, the diameter of the nylon brush bristles is 0.05-0.2mm, and the material of the dust collection chamber of the telescopic labyrinth accordion cover is wear-resistant polyurethane or silicone composite material.

[0029] A combined roller conveyor device includes:

[0030] Fixed frame;

[0031] A roller conveyor assembly is mounted on the fixed frame;

[0032] The movable guardrail adjustment assembly is located on both sides of the roller conveyor assembly and is used to adjust the conveying width;

[0033] A differential pressure adaptive floating brush holder is disposed below the roller conveyor assembly and includes a floating rocker arm and a pneumatic diaphragm box, wherein nylon brushes are mounted on the floating rocker arm;

[0034] The telescopic maze accordion dust collection chamber covers the outer periphery of the nylon brush. The fixed end of the telescopic maze accordion dust collection chamber is connected to the fixed frame, and the movable end is connected to the movable guardrail adjustment component. The air passage of the pneumatic diaphragm box is connected to the interior of the telescopic maze accordion dust collection chamber.

[0035] The control system stores a triboelectric-current mapping model and a width-flow resistance compensation model.

[0036] Preferably, the device further includes a control system, a current sensor, and a differential pressure sensor;

[0037] The current sensor is connected to the drive motor of the nylon brush, and the differential pressure sensor is located at the outlet of the dust collection chamber of the telescopic labyrinth accordion. The current sensor and the differential pressure sensor are respectively electrically connected to the control system.

[0038] Compared with the prior art, the present invention has the following improvements and advantages:

[0039] 1. This invention utilizes a purely physical feedback loop formed by a pneumatic diaphragm box and a dust collection chamber to automatically adjust the contact pressure of the nylon brush against the roller by using negative pressure fluctuations caused by local flow resistance changes. As dust accumulation increases the flow resistance between the brush and the roller, the negative pressure in the dust collection chamber rises, so the pneumatic diaphragm box generates a stronger pulling force under the pressure difference to press the brush against the roller. Conversely, when the roller is clean, the flow resistance decreases, causing the negative pressure to drop, and the brush pressing force decreases accordingly.

[0040] 2. The width-flow resistance compensation model of this invention dynamically calculates the target flow rate of the fan based on the real-time width and conveying speed of the movable guardrail, thus offsetting the boundary layer airflow interference generated by the high-speed rotating drum. Through a dual-channel signal processing architecture, a high-pass filter is used to extract the high-frequency components in the current signal. When hard particles are detected, the system can promptly remove the hazardous substances by increasing the suction force, avoiding mechanical damage to the drum surface caused by hard particles, and realizing differentiated treatment of flexible dust and rigid foreign objects.

[0041] 3. By setting up lifting dividers and adjusting the negative pressure setting value in conjunction with them, the adsorption collapse or mechanical interference caused by excessive compression of the accordion cover in extremely narrow widths is effectively avoided, ensuring the equipment's passability across the entire specification range. Attached Figure Description

[0042] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0043] Figure 1 This is a schematic diagram of the overall external structure of the device;

[0044] Figure 2 This is a structural schematic diagram of the roller conveyor assembly and the movable guardrail adjustment assembly;

[0045] Figure 3 This is a schematic diagram of the differential pressure adaptive floating brush holder.

[0046] Figure 4 This is a flowchart of the method of the present invention.

[0047] In the diagram: 100, fixed frame; 200, roller conveyor assembly; 210, roller; 220, lifting divider; 300, movable guardrail adjustment assembly; 400, telescopic labyrinth accordion dust collection chamber; 420, sealing lip; 500, differential pressure adaptive floating brush holder; 510, floating rocker arm; 520, nylon brush; 530, brush bristles; 540, pneumatic diaphragm box; 541, nonlinear stiffness limiting spring; 542, critical pressure relief bypass; 600, brush drive motor. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0049] Example 1:

[0050] Please see Figures 1-4 The present invention provides a combined roller conveyor method, comprising:

[0051] S1. A roller conveyor assembly 200, a movable guardrail adjustment assembly 300, a differential pressure adaptive floating brush holder 500, a telescopic labyrinth accordion dust collection chamber 400, and a dust collection negative pressure system are provided. The roller conveyor assembly 200 includes multiple rollers arranged in parallel. The movable guardrail adjustment assembly 300 is used to drive the side guardrail to move axially relative to the rollers. The differential pressure adaptive floating brush holder 500 is located on the non-working surface below the rollers. The fixed end of the telescopic labyrinth accordion dust collection chamber 400 is connected to the fixed frame 100, and the moving end moves synchronously with the movable guardrail adjustment assembly 300. The dust collection negative pressure system is connected to the telescopic labyrinth accordion dust collection chamber 400.

[0052] S2. Pre-build a control model and configure it in the control system. The control model includes a friction-current mapping model and a width-flow resistance compensation model. The friction-current mapping model is used to correlate the current spectrum of the brush motor with the dust density on the roller surface. The width-flow resistance compensation model is used to correlate the width position of the movable guardrail adjustment component 300 with the target speed of the dust collection negative pressure system.

[0053] S3. Perform width adjustment and pneumatic seal locking. Before the widening action begins, cut off the negative pressure of the dust collection negative pressure system, drive the movable guardrail adjustment component 300 to the target width, and then restore the operation of the dust collection negative pressure system so that the negative pressure in the dust collection chamber 400 of the telescopic labyrinth accordion reaches -0.02MPa to -0.05MPa. Use the internal and external pressure difference to drive the sealing lip 420 of the dust collection chamber 400 of the telescopic labyrinth accordion to be tightly attached to the lower edge of the roller.

[0054] S4. Start the conveying and reverse differential cleaning, drive the roller to convey materials, and at the same time drive the nylon brush 520 on the differential pressure adaptive floating brush holder 500 to rotate. The rotation direction of the nylon brush 520 is opposite to the rotation direction of the roller, and the ratio of the linear velocity of the nylon brush 520 to the linear velocity of the roller is 1.2 to 1.

[0055] S5. Perform endogenous self-suppression balance. Utilize the pneumatic diaphragm box 540 that connects the dust collection negative pressure system and the differential pressure adaptive floating brush holder 500 to automatically adjust the contact pressure of the nylon brush 520 on the roller according to the negative pressure fluctuation in the dust collection chamber, so that the contact pressure is maintained between 0.1MPa and 0.3MPa.

[0056] A combined roller conveyor method is proposed to solve the structural contradiction between rigid guidance and flexible dust removal sealing during the conveying of variable specification battery modules. By constructing a physical field environment that couples pneumatic flexible sealing with mechanical variable cells, dynamic capture of unstructured dust is achieved.

[0057] This method arranges a roller conveyor assembly 200 as a material carrier at the physical level and configures a movable guardrail adjustment assembly 300 to adapt to material specifications of different widths. At the same time, a differential pressure adaptive floating brush frame 500 and a telescopic labyrinth accordion dust collection chamber 400 are deployed on the non-working surface below the roller. The dust collection negative pressure system is connected to the dust collection chamber to form a controlled negative pressure flow field.

[0058] Based on this, the control system loads a friction-current mapping model and a width-flow resistance compensation model. The former maps the current spectrum characteristics of the brush motor to the dust density state on the roller surface. To address the interference caused by pressure fluctuations during the adaptive adjustment of the differential pressure adaptive floating brush holder 500, this model specifically introduces pressure decoupling logic: using the instantaneous phase current signal of the brush drive motor 600 as the input source, to resolve the frequency domain conflict between extracting low-frequency friction features and high-frequency hard particle features from a single signal stream, the system constructs a parallel dual-channel signal processing architecture here: Channel one is used for friction-current mapping. First, the current signal undergoes bandpass filtering preprocessing from 50Hz to 500Hz, and the root mean square value of the filtered signal is calculated as the friction feature value. Simultaneously, the negative pressure signal in the dust collection chamber is acquired in real time as a pressure correction parameter. Substitute the eigenvalues ​​into the pre-calibrated pressure compensation model;

[0059]

[0060] in, Defined as the root mean square value of the reference current when the drum is running at its current speed under clean and unloaded conditions, the function... The specific configuration is as follows: The linear normalization function, This is the pressure sensitivity correction factor, and its physical unit is . This is used to balance dimensions and convert pressure fluctuations into a dimensionless gain factor.

[0061] This coefficient The calibration procedure is as follows: Under the baseline condition that the drum is clean and unloaded, keep the drum speed constant and adjust the dust collection negative pressure system to achieve the required negative pressure value. The pressure was varied at multiple points within the range of -0.01 MPa to -0.05 MPa. The root mean square value of the motor current at each pressure point was recorded. The slope was obtained by fitting the linear relationship between the pressure and current data using the least squares method. Unit: A / MPa, and the slope Divide by the reference current Get the final Value, that is This allows us to isolate the influence of changes in normal pressure on frictional torque and obtain a true estimate of the dust density on the drum surface. Channel 2, as a parallel branch, is specifically designed to capture the high-frequency vibration characteristics generated by hard particles. Its input terminal shares the same current sensor signal as Channel 1. After being processed by a high-pass filter with a cutoff frequency of 1kHz, the signal is sent to the logic unit to determine whether hard particles are present, thereby achieving physical separation of flexible dust and rigid foreign objects in the frequency domain.

[0062] Based on the calculated D value, the control system outputs adjustment commands to the dust collection negative pressure system and the drum drive unit: If If the value exceeds the preset heavy pollution threshold, the system will automatically trigger an audible and visual alarm and reduce the conveyor speed to extend the cleaning time; [the coefficient here...] Defined as the dust density coefficient corresponding to a unit current increment, its calibration logic is as follows: During the manufacturing initialization stage, three known density samples of 10 g / m², 20 g / m², and 50 g / m² are prepared using A2 fine dust conforming to ISO 12103-1 standard and coated on the roller surface. The current increment during stable operation is recorded. With the current increment as the independent variable and the dust density as the dependent variable, the slope of the linear regression equation is calculated using the least squares method as a fixed value. Values ​​are set to eliminate the impact of individual motor differences on detection accuracy;

[0063] The latter dynamically calculates the target rotation speed of the dust collection negative pressure system based on the width of the guardrail to compensate for flow resistance fluctuations caused by changes in cavity volume. When performing width adjustment, the system adopts a strategy of first loosening and then locking. That is, the negative pressure is cut off before the widening action begins, so that the telescopic labyrinth accordion dust collection chamber 400 is in a flexible and relaxed state to reduce driving resistance. After reaching the target width, the negative pressure is restored to -0.02MPa to -0.05MPa, and the internal and external pressure difference drives the sealing lip 420 to press tightly against the lower edge of the roller to form a pneumatic lock. During the conveying process, the roller conveys the material, and the nylon brush 520 rotates in the opposite direction at a linear velocity ratio of 1.2 to 1. It uses mechanical shear force to destroy the dust adsorption layer. With the help of the endogenous self-suppression balancing mechanism, the pneumatic diaphragm box 540 senses the negative pressure fluctuations in the dust collection chamber and automatically adjusts the contact pressure of the brush to maintain it at 0.1MPa to 0.3MPa, thereby minimizing wear while ensuring dust removal efficiency.

[0064] Step S1 includes the following:

[0065] S1.1 Configure the sealing lip 420 and pneumatic diaphragm 540 of the telescopic labyrinth accordion dust collection chamber 400, wherein the geometric dimensions of the sealing lip 420 and the elastic coefficient of the pneumatic diaphragm 540 are determined based on the fluid dynamics simulation model to minimize the edge turbulence of the telescopic labyrinth accordion dust collection chamber 400 under the maximum stretch width and maximize the response sensitivity of the pneumatic diaphragm 540.

[0066] This embodiment is a further specification of step S1.1 above, which involves constructing a fluid dynamics simulation model. Before manufacturing the physical prototype, this step uses computational fluid dynamics software to build a virtual environment, aiming to solve the problem of flow field instability in the telescopic structure under extreme stretching conditions. By setting the boundary conditions of the telescopic labyrinth accordion dust collection chamber 400 under the maximum stretching width, the deformation and turbulence distribution of sealing lips 420 with different geometric dimensions in the negative pressure flow field are simulated. With the goal of minimizing the edge turbulent kinetic energy, the optimal cross-sectional shape and contact angle of the sealing lip 420 are determined to prevent secondary dust escape caused by turbulence.

[0067] Meanwhile, multi-physics coupling simulation was performed on the mechanical response of the pneumatic diaphragm 540 to calculate its displacement characteristics under different negative pressure values. The elastic coefficient was optimized with the goal of maximizing response sensitivity to ensure that the diaphragm can generate sufficient mechanical displacement to withstand small pressure fluctuations, thereby giving the system the ability to respond to changes in dust load in milliseconds during actual operation.

[0068] The differential pressure adaptive floating brush holder 500 includes a floating rocker arm 510 and a pneumatic diaphragm box 540 disposed below the floating rocker arm 510. In step S5:

[0069] When the frictional resistance between the nylon brush 520 and the roller increases, causing the airflow channel in the cleaning area to narrow, the local negative pressure in the dust collection chamber of the telescopic labyrinth accordion increases, driving the pneumatic diaphragm box 540 to generate an upward suction force, which pulls the floating rocker arm 510 to press the nylon brush 520 against the roller.

[0070] When the surface of the roller is clean, resulting in smooth airflow, the negative pressure in the dust collection negative pressure system drops, the suction of the pneumatic diaphragm box 540 decreases, and the nylon brush 520 reduces the clamping force on the roller.

[0071] This embodiment further specifies the endogenous self-suppressing balancing steps described above; the differential pressure adaptive floating brush holder 500 achieves a flexible connection between the brush and the fixed frame 100 through the floating rocker arm 510, while the pneumatic diaphragm box 540 serves as the mechanical conversion medium connecting the dust collection negative pressure system and the floating rocker arm 510; in actual operation, this structure constructs a purely physical feedback antagonistic balancing system: when the frictional resistance between the nylon brush 520 and the roller increases due to dust accumulation or increased viscosity, the airflow channel between the contact surfaces of the brush and the roller narrows, causing a sudden increase in local flow resistance, and the negative pressure value in the dust collection negative pressure system increases accordingly;

[0072] This increased negative pressure value acts directly on the pneumatic diaphragm 540, causing it to generate a greater upward suction force. This suction force is converted into downward pressure on the nylon brush 520 through the floating rocker arm 510, forcing the brush to press more tightly against the roller surface, thereby enhancing the cleaning force. This mechanism utilizes positive feedback response to quickly respond to high resistance loads, rapidly removing accumulated dust by enhancing the cleaning force. As the dust is removed, the airflow channel between the brush and the roller is reopened, causing the negative pressure value to drop naturally, thus forming a dynamic closed loop of load-response positive feedback and cleaning recovery negative feedback.

[0073] To avoid the aforementioned positive feedback mechanism leading to brush lock-up (i.e., pressure increasing indefinitely), the pneumatic diaphragm 540 integrates a nonlinear stiffness limiting spring 541 and a critical pressure relief bypass 542. The nonlinear stiffness limiting spring 541 is a conical variable pitch spring, utilizing the characteristic that its large pitch coil preferentially adheres and fails during compression. This reduces the effective number of spring coils as compression increases, resulting in an exponential increase in stiffness to prevent further displacement. Simultaneously, the critical pressure relief bypass 542 is designed as a spring-preloaded steel ball check valve with a set opening pressure of -0.06MPa. When this critical value is reached, the valve opens, allowing some airflow to be released through the bypass. This triggers high-frequency micro-vibration in the pneumatic diaphragm 540, which in turn drives the nylon brush 520 into a micro-vibration cleaning mode. The high-frequency alternating stress wave generated by the vibration breaks down the van der Waals forces and physical bonding bridges between dust particles, thereby loosening and removing hardened dust and clearing the air passage, forcing the negative pressure to drop.

[0074] Conversely, when the roller surface is clean and the airflow is smooth, the negative pressure value in the system naturally drops, the suction of the pneumatic diaphragm box 540 decreases, and the pressure of the brush on the roller decreases accordingly. This mechanism does not require the participation of electronic sensors. It can achieve adaptive adjustment of sweeping tightly when dirty and sweeping lightly when clean, based solely on the dynamic balance of fluid pressure and mechanical force. This effectively extends the service life of the brush and ensures the stability of the conveying process.

[0075] In step S2, the width-flow resistance compensation model is configured as follows: establish a functional relationship between the target flow rate of the fan and the real-time width and conveying speed of the movable guardrail adjustment component 300. The target flow rate of the fan is set to increase with the increase of the real-time width and gain compensation is performed with the increase of the conveying speed to maintain the effective negative pressure in the dust collection chamber 400 of the telescopic labyrinth accordion.

[0076] This embodiment further specifies the configuration steps of the width-flow resistance compensation model described above. This model is embedded in the algorithm core of the control system, aiming to solve the negative pressure instability problem caused by changes in the dust collection chamber volume during the widening process. The control system acquires the width data of the movable guardrail adjustment component 300 in real time through a linear encoder, and calculates the target flow rate of the fan using a preset functional relationship in conjunction with the current conveying speed. The processing flow of this model is broken down as follows: the input sources are the real-time width value W collected by the linear encoder and the roller linear velocity V collected by the conveying speed sensor; the logical steps first follow the formula:

[0077]

[0078] set up The real-time width unit is , The unit is , The unit is , The unit is ,but The unit of volumetric flow rate is Calculate the basic flow, where, It is a quadratic function based on the change in the cross-sectional area of ​​the cavity:

[0079]

[0080] The coefficient of the quadratic function The following calibration steps are used to obtain the following information: During the system debugging phase, the movable guardrail adjustment component 300 is set to its minimum width. Middle width and maximum width At three locations, with the fan frequency adjusted until the negative pressure inside the dust collection chamber stabilizes at the standard value of -0.03 MPa while the chamber is stationary, the fan flow rate is recorded at each location. These three groups Substitute the data into the quadratic equation and solve the system of equations to determine the constants. The specific value is used to non-linearly increase the target flow rate of the wind turbine to compensate for the pressure loss caused by the increase in volume;

[0081] According to speed The dynamic pressure disturbance coefficient Kv is obtained from a lookup table. The data for this lookup table is based on fluid dynamics simulations, which are derived by simulating the flow field distribution of the roller at different linear velocities from 0.5 m / s to 3.0 m / s and fitting the dynamic pressure loss data at the suction port. The velocity... With coefficient It exhibits a non-linear exponential growth relationship. In this embodiment, it is concretized into a fitting function based on CFD simulation data:

[0082]

[0083] in, The linear velocity of the roller is expressed in m / s, and the coefficient is... The velocity sensitivity coefficient is obtained based on CFD simulation fitting, and its unit is . ;Right now The larger the negative pressure, the stronger the effect of boundary layer-induced airflow in counteracting the negative pressure, and the more compensation is required. The value increases sharply, and a compensation algorithm is executed. Perform the final calculation to obtain the target flow rate of the wind turbine;

[0084] To convert the flow command into a hardware-executable electrical signal, the system employs a lookup table mapping logic based on the PQ characteristic curve: a flow-frequency correspondence table of the fan under different static pressures is pre-stored, and the control system combines the real-time static pressure value fed back by the differential pressure sensor with the calculated... The corresponding drive frequency is retrieved from the mapping table. If the target value is located between the sampling points, linear interpolation is used to calculate the target frequency command of the wind turbine inverter.

[0085] The reason for introducing conveying speed as a gain compensation parameter is that the high-speed rotating drum will generate a stronger boundary layer induced airflow, which will interfere with the negative pressure field in the dust collection chamber. Through the gain compensation that increases with the conveying speed, the system can counteract this dynamic pressure interference and maintain a constant effective negative pressure in the telescopic labyrinth accordion dust collection chamber 400, ensuring reliable sealing and dust collection through pressure difference under any working condition.

[0086] The steps in S4 include:

[0087] Real-time monitoring of the current signal of the nylon brush 520 drive motor;

[0088] Extract the high-frequency components of the current signal;

[0089] The specific processing flow includes: the current sensor acquires the raw current data of the drive motor at a sampling frequency of not less than 10 kHz; a high-pass filter is used to filter out the fundamental component and low-order harmonics of 50 Hz; the envelope amplitude of the remaining high-frequency signal is calculated as a physical indicator for determining the collision intensity of hard particles.

[0090] Determine whether the high-frequency components exceed the preset threshold;

[0091] The preset threshold is obtained by calibrating the peak current fluctuation generated when hard particles of different sizes enter the gap between the drums under experimental conditions, so as to ensure that it can effectively distinguish between normal friction noise and abnormal collision vibration.

[0092] If the high-frequency component exceeds the preset threshold, it is determined that there are hard particulate dust particles, and the dust collection negative pressure system is controlled to increase the suction power.

[0093] If the high-frequency component does not exceed the preset threshold, it is determined to be regular dust, and the current suction power of the dust collection negative pressure system is maintained;

[0094] This embodiment is a further specification of the above-mentioned conveying and reverse differential cleaning steps; this step introduces a foreign object identification mechanism based on frequency domain analysis, which aims to prevent hard particles from scratching the roller surface; the system monitors the current signal of the nylon brush 520 drive motor in real time through a high-frequency sampling current sensor, and uses fast Fourier transform to extract the high-frequency components in the current signal; because hard particles, such as metal shavings and sand, will generate characteristic high-frequency mechanical vibrations when they collide with the high-speed rotating brush bristles 530, this vibration will modulate the motor load current to form high-frequency noise, while conventional soft dust will not produce such characteristics;

[0095] Therefore, the control system compares the extracted high-frequency component amplitude with a preset threshold, which is set to 1.5 to 2.0 times the high-frequency noise floor amplitude of the motor current measured under the no-load condition of the clean drum. Once the threshold is exceeded, it is determined that there is hard particulate dust, and the dust collection negative pressure system is instructed to increase the suction power, using strong airflow to quickly peel off and suck away the heavy particles; if the high-frequency component does not exceed the standard, it is determined to be regular dust, and the current suction power is maintained. This control strategy based on implicit feature extraction realizes differentiated treatment of dust of different properties, optimizing energy consumption while protecting the equipment.

[0096] The roller conveyor assembly 200 is also equipped with lifting dividers 220 between the rollers. Step S3 further includes:

[0097] Detect whether the target width is less than the preset narrow spacing threshold;

[0098] The narrow spacing threshold is determined based on the material interference limit of the dust collection chamber 400 of the telescopic maze accordion under maximum compression, and is used to determine whether the wall of the accordion is at risk of adsorption collapse due to excessive spatial compression.

[0099] If so, the lifting partition 220 is raised to form a physical guide channel, and the negative pressure setting value of the dust collection negative pressure system is reduced to -0.01MPa to -0.02MPa;

[0100] If not, control the lifting divider 220 to remain in the retracted state and maintain the negative pressure setting value of the dust collection negative pressure system within the standard working range;

[0101] This embodiment further specifies the aforementioned width adjustment and pneumatic sealing locking steps. This step designs a linkage mechanism between physical guidance and pneumatic parameters for extremely narrow material conveying scenarios. When the control system detects that the target width is less than the preset narrow spacing threshold, it means that the movable guardrail adjustment components 300 on both sides are extremely close. At this time, the dust collection chamber 400 of the telescopic labyrinth accordion is in a highly compressed state. If the high negative pressure is maintained, it may cause the wall of the accordion to collapse and hinder the operation of the roller. Therefore, the system automatically controls the lifting partition 220 located between the roller conveying components 200 to rise, constructing a physical guidance channel to replace the guiding function of the side guardrails. At the same time, the negative pressure setting value of the dust collection negative pressure system is reduced to -0.01MPa to -0.02MPa. This low negative pressure setting can maintain the basic dust collection airflow and avoid mechanical interference caused by excessive contraction of the accordion, ensuring the passability and safety of the conveying system under narrow spacing conditions.

[0102] In step S1, the nylon brush 520 has a bristle 530 with a diameter of 0.05-0.2mm, and the telescopic labyrinth accordion dust collection chamber 400 is made of wear-resistant polyurethane or silicone composite material.

[0103] This embodiment further specifies the hardware selection parameters mentioned above. The diameter of the bristles 530 of the nylon brush 520 is strictly limited to the range of 0.05-0.2mm. This size selection is based on microscopic contact mechanics considerations. The finer bristles 530 can penetrate deep into the micron-level texture of the roller surface, effectively removing embedded dust, while maintaining sufficient flexibility to avoid wear on the roller's finished surface. The telescopic labyrinth accordion dust collection chamber 400 is made of wear-resistant polyurethane or silicone composite material. This type of material not only has excellent tear resistance and can withstand the tensile stress caused by the frequent reciprocating movement of the movable guardrail adjustment component 300, but also has a moderate elastic modulus, which can undergo moderate deformation in a negative pressure environment of -0.02MPa to -0.05MPa, helping the sealing lip 420 to better fit the roller contour, thereby ensuring the reliable realization of the pneumatic sealing mechanism at the material level. The system switches between the standard negative pressure range and the energy-saving obstacle avoidance negative pressure range, from -0.01MPa to -0.02MPa, according to the conveying width.

[0104] Example 2:

[0105] Please see Figures 1-3 A combined roller conveyor device, comprising:

[0106] Fixed frame 100;

[0107] Roller conveyor assembly 200 is mounted on fixed frame 100;

[0108] The movable guardrail adjustment component 300 is located on both sides of the roller conveyor component 200 and is used to adjust the conveying width;

[0109] A differential pressure adaptive floating brush holder 500 is located below the roller conveyor assembly 200 and includes a floating rocker arm 510 and a pneumatic diaphragm box 540. A nylon brush 520 is mounted on the floating rocker arm 510.

[0110] The telescopic maze accordion dust collection chamber 400 is covered by the nylon brush 520. The fixed end of the telescopic maze accordion dust collection chamber 400 is connected to the fixed frame 100, and the movable end is connected to the movable guardrail adjustment component 300. The air passage of the pneumatic diaphragm box 540 is connected to the inside of the telescopic maze accordion dust collection chamber 400.

[0111] The pneumatic diaphragm 540 also integrates a nonlinear stiffness limiting spring 541 for limiting displacement stroke, and a critical pressure relief bypass 542 for overpressure protection.

[0112] It also includes a control system, current sensors, and differential pressure sensors;

[0113] The current sensor is connected to the drive motor of the nylon brush 520, and the differential pressure sensor is located at the outlet of the dust collection chamber 400 of the telescopic labyrinth accordion cover. The current sensor and the differential pressure sensor are electrically connected to the control system respectively.

[0114] This embodiment provides a combined roller conveyor device that performs the above method. The device integrates mechanical structure and pneumatic control hardware. The fixed frame 100 serves as a basic support platform, supporting the roller conveyor assembly 200 for material transfer. The movable guardrail adjustment assembly 300 is symmetrically arranged on both sides of the roller. Driven by a screw or linear module, it directly drives the moving end of the telescopic labyrinth accordion dust collection chamber 400 connected to it, realizing the synchronous cell change of the dust collection chamber with the conveying width.

[0115] The differential pressure adaptive floating brush holder 500 is suspended below the roller, and its floating rocker arm 510 structure allows the nylon brush 520 to move slightly in the vertical direction. The air passage of the pneumatic diaphragm box 540 is directly connected to the inside of the telescopic labyrinth accordion dust collection chamber 400, forming a physical feedback loop. The control system, as the core hub, collects the current sensor signal on the nylon brush 520 drive motor and the differential pressure sensor data at the outlet of the telescopic labyrinth accordion dust collection chamber 400 through electrical connection. Based on these real-time sensor data, the control system can accurately adjust the fan speed and brush status, and ensure the dust removal efficiency and operational stability of the device under variable width, variable speed and variable load conditions through hardware closed loop.

[0116] Instantaneous physical adjustment is performed by the pneumatic diaphragm 540, and global closed-loop monitoring signals are provided by the differential pressure sensor.

[0117] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A combined roller conveyor method, characterized in that, include: S1. A roller conveyor assembly (200), a movable guardrail adjustment assembly (300), a differential pressure adaptive floating brush holder (500) located below the roller, and a telescopic labyrinth accordion dust collection chamber (400) that moves synchronously with the guardrail are provided, and the dust collection chamber is connected to the dust collection negative pressure system. S2. Pre-build control models, including a friction-current mapping model relating brush motor current to dust density, and a width-flow resistance compensation model relating guardrail width to negative pressure system speed. S3. Execute width adjustment and seal locking: Cut off the negative pressure before widening, and restore the negative pressure to -0.02MPa to -0.05MPa after adjusting to the target width. Use the pressure difference to drive the sealing lip (420) to tightly adhere to the roller. S4. Start conveying and reverse cleaning: Drive the roller conveyor while controlling the nylon brush (520) to rotate in the opposite direction to the roller at a linear speed ratio of 1.2:

1. S5. Perform endogenous self-suppression balance: Utilize the pneumatic diaphragm box (540) to respond to the negative pressure fluctuations in the dust collection chamber and automatically adjust the brush contact pressure to maintain it between 0.1MPa and 0.3MPa; The steps preceding S1 include: S1.1 Configure the sealing lip (420) of the telescopic maze accordion dust collection chamber (400) and the pneumatic diaphragm (540), wherein the geometric dimensions of the sealing lip (420) and the elastic coefficient of the pneumatic diaphragm (540) are determined based on a fluid dynamics simulation model to minimize the edge turbulence of the telescopic maze accordion dust collection chamber (400) under the maximum stretch width and maximize the response sensitivity of the pneumatic diaphragm (540); The differential pressure adaptive floating brush holder (500) includes a floating rocker arm (510) and a pneumatic diaphragm box (540) disposed below the floating rocker arm (510). In step S5: When the frictional resistance between the nylon brush (520) and the roller (210) increases, causing the airflow channel in the cleaning area to narrow, the local negative pressure in the dust collection chamber of the telescopic labyrinth accordion increases, driving the pneumatic diaphragm box (540) to generate an upward suction force, pulling the floating rocker arm (510) to press the nylon brush (520) against the roller (210). When the surface of the roller (210) is clean, resulting in smooth airflow, the negative pressure in the dust collection negative pressure system drops, the suction of the pneumatic diaphragm box (540) decreases, and the nylon brush (520) reduces the clamping force on the roller (210); In step S2, the width-flow resistance compensation model is configured as follows: establish a functional relationship between the target flow rate of the fan and the real-time width and conveying speed of the movable guardrail adjustment component (300), wherein the target flow rate of the fan is set to increase with the increase of the real-time width and gain compensation is performed with the increase of the conveying speed to maintain the effective negative pressure in the dust collection chamber (400) of the telescopic labyrinth accordion cover; Step S4 further includes: Real-time monitoring of the current signal of the nylon brush (520) drive motor; Extract the high-frequency components of the current signal; Determine whether the high-frequency component exceeds a preset threshold; If the high-frequency component exceeds the preset threshold, it is determined that there are hard particulate dust particles, and the dust collection negative pressure system is controlled to increase the suction power. If the high-frequency component does not exceed the preset threshold, it is determined to be normal dust, and the current suction power of the dust collection negative pressure system is maintained; The roller conveyor assembly (200) is further provided with lifting dividers (220) between the rollers, and step S3 further includes: Detect whether the target width is less than a preset narrow spacing threshold; If so, the lifting partition bar (220) is raised to form a physical guide channel, and the negative pressure setting value of the dust collection negative pressure system is reduced to -0.01MPa to -0.02MPa; If not, the lifting divider (220) is kept in a retracted state, and the negative pressure setting value of the dust collection negative pressure system is maintained within the standard working range.

2. The combined roller conveyor method according to claim 1, characterized in that, In step S1, the diameter of the bristles (530) of the nylon brush (520) is 0.05-0.2mm, and the material of the telescopic labyrinth accordion dust collection chamber (400) is wear-resistant polyurethane or silicone composite material.

3. A combined roller conveyor device, characterized in that, include: Fixed frame (100); A roller conveyor assembly (200) is mounted on the fixed frame (100); An adjustable guardrail assembly (300) is disposed on both sides of the roller conveyor assembly (200) for adjusting the conveying width; A differential pressure adaptive floating brush holder (500) is disposed below the roller conveyor assembly (200) and includes a floating rocker arm (510) and a pneumatic diaphragm box (540), on which a nylon brush (520) is mounted. The telescopic maze accordion dust collection chamber (400) is covered around the nylon brush (520). The fixed end of the telescopic maze accordion dust collection chamber (400) is connected to the fixed frame (100), and the movable end is connected to the movable guardrail adjustment assembly (300). The air passage of the pneumatic diaphragm box (540) is connected to the inside of the telescopic maze accordion dust collection chamber (400). A control system, wherein a triboelectric-current mapping model and a width-flow resistance compensation model are stored, and configured to perform the method as described in any one of claims 1 to 2.

4. A combined roller conveyor device according to claim 3, characterized in that, It also includes current sensors and differential pressure sensors; The current sensor is connected to the drive motor of the nylon brush (520), and the differential pressure sensor is located at the outlet of the dust collection chamber (400) of the telescopic labyrinth accordion cover. The current sensor and the differential pressure sensor are electrically connected to the control system.

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