Material uniformizing device for tobacco belt conveyor and using method of material uniformizing device

Abstract

The invention discloses a material uniformizing device for a tobacco belt conveyor and a use method of the material uniformizing device, and belongs to the technical field of tobacco shred making equipment, the material uniformizing device comprises a material flattening mechanism, a material uniformizing mechanism and a detection control module; the material flattening mechanism and the material uniformizing mechanism are sequentially installed on the portion, above a conveying belt of the belt conveyor, of the rack in the material conveying sequence. The detection control module comprises a thickness detection probe, a controller and a frequency converter, the thickness detection probe is installed on the rack and located on the downstream of the material uniformizing mechanism, the detection end of the thickness detection probe faces the belt bearing face, and the signal output end of the thickness detection probe is connected with the signal input end of the controller; the control output end of the controller is connected with the control end of the frequency converter, and the power output end of the frequency converter is connected with a driving motor of the belt conveyor. Stable control over the thickness of materials on the conveying belt and automatic balance of the flow can be achieved, and finally the purposes of reducing material blocking, improving production continuity and reducing manual intervention and material loss are achieved.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing equipment technology, specifically to a material leveling device for a tobacco belt conveyor and its usage method. Background Technology

[0002] In the tobacco processing industry, recycled tobacco shreds need to be reused through a blending process. Belt conveyors are key equipment for transporting this material. Driven by a motor, the belt rotates continuously, transporting the tobacco shreds from the buffer tank to the subsequent processing stage. During this process, ensuring that the tobacco shreds are evenly distributed on the belt and that the flow rate is stable is an important prerequisite for ensuring production continuity and product quality.

[0003] In existing technologies, belt conveyors are typically used in the tobacco blending section for recycling, mainly including DPH type belt conveyors and DUC type belt conveyors. However, these conveyors present the following technical problems in practical applications:

[0004] The material-discharging rollers in the buffer cabinets of existing belt conveyors are incompatible with the physical properties of short-fiber tobacco shreds. This results in a large amount of tobacco shreds leaking out from the gaps without being effectively evenly distributed, causing severe unevenness in the thickness of the material on the belt. The peak thickness fluctuation can reach tens of millimeters. The fixed baffles on the conveyor belt used to smooth the tobacco shreds on the belt cannot adapt to the dynamic changes in material flow. When the amount of tobacco shreds suddenly increases, they tend to accumulate in front of the fixed baffles, leading to frequent blockages and seriously affecting the continuity of production. In addition, existing belt conveyors lack a real-time online detection and feedback mechanism for material thickness, and belt speed adjustment is severely lagging, making it impossible to achieve dynamic speed regulation based on tobacco flow rate. This not only exacerbates the risk of material blockage, but also requires manual unblocking after blockage, which is not only time-consuming and labor-intensive, but also easily leads to the tobacco being broken into small pieces. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a material leveling device for tobacco belt conveyors and its usage method, which integrates the functions of material leveling, material uniformity, real-time thickness detection and intelligent speed adjustment, to achieve stable control of material thickness and automatic flow balance, ultimately reducing material blockage, improving production continuity, and reducing manual intervention and material loss.

[0006] The technical solution of the present invention is as follows: In a first aspect of the invention, a material leveling device for a tobacco belt conveyor is provided, comprising a leveling mechanism, a material leveling mechanism, and a detection and control module; the leveling mechanism and the material leveling mechanism are sequentially installed on a frame above the conveyor belt of the belt conveyor in the material conveying sequence; the detection and control module includes a thickness detection probe, a controller, and a frequency converter; the thickness detection probe is installed on the frame and located downstream of the material leveling mechanism, the detection end of the thickness detection probe is oriented towards the belt bearing surface, the signal output end of the thickness detection probe is connected to the signal input end of the controller, the control output end of the controller is connected to the control end of the frequency converter, and the power output end of the frequency converter is connected to the drive motor of the belt conveyor.

[0007] In some embodiments of the present invention, the material leveling mechanism includes a material leveling baffle and a first adjusting bracket. The first adjusting bracket includes a support rod and a swing arm. Two support rods are respectively arranged on both sides of the frame. The two support rods are respectively equipped with swing arms, and the material leveling baffle is installed between the two swing arms.

[0008] In some embodiments of the present invention, the flat baffle is configured as a wedge-shaped structure, the tip of the flat baffle is positioned close to the conveyor belt, the included angle between the flat baffle and the belt surface of the conveyor belt is an acute angle, and the width of the flat baffle is adapted to the effective width of the conveyor belt.

[0009] In some embodiments of the present invention, the material leveling mechanism includes a material leveling plate with a U-shaped structure and a second adjusting bracket. The second adjusting bracket includes an optical axis and a bushing. Two optical axes are respectively arranged on both sides of the frame. The two optical axes are respectively equipped with bushings, and the material leveling plate is installed between the two bushings.

[0010] In some embodiments of the present invention, the bottom of the leveling plate is configured as an arc-shaped structure and adapted to the belt surface of the conveyor belt, the width of the leveling plate is adapted to the effective width of the conveyor belt, a material passage groove is formed on the plate body along the width direction, and the included angle between the leveling plate and the belt surface of the conveyor belt is an acute angle.

[0011] In some embodiments of the present invention, the thickness detection probe is configured as an ultrasonic probe, which is mounted on a frame via a three-dimensional adjustable bracket.

[0012] In some embodiments of the present invention, the controller is configured to: receive material thickness values ​​detected in real time by a thickness detection probe, calculate a target running speed of the conveyor belt based on the material thickness value and a preset target flow rate value, wherein the target running speed is inversely proportional to the material thickness value, and generate a frequency converter frequency adjustment signal based on the target running speed of the belt.

[0013] In some embodiments of the present invention, the adjustable support includes uprights, two of which are respectively provided on both sides of the frame via connectors, and a crossbar is installed between the two uprights via connectors. A connecting rod is installed on the crossbar via connectors, and a mounting seat is provided at the end of the connecting rod away from the crossbar. A thickness detection probe is provided on the mounting seat.

[0014] In some embodiments of the present invention, the leveling mechanism and the uniformizing mechanism are configured as a modular structure, having an installation structure adaptable to conveyor belts of different bandwidths.

[0015] In a second aspect of the invention, a method of using a leveling device for a tobacco belt conveyor is provided, comprising: The leveling mechanism and the evenly distributing mechanism are installed sequentially on the frame above the conveyor belt of the belt conveyor in the order of material conveying. During the operation of the belt conveyor, the thickness detection probe continuously detects the thickness of the material on the conveyor belt after it has been processed by the leveling mechanism and the uniformizing mechanism, and generates a thickness signal. The controller receives the thickness signal and calculates the target running speed of the conveyor belt based on the real-time thickness signal and the preset flow target. The controller sends control commands related to the target running speed to the frequency converter, and the frequency converter adjusts the output frequency to change the speed of the drive motor, so that the running speed of the conveyor belt is adjusted accordingly.

[0016] One or more technical solutions of the present invention have the following beneficial effects: By using a leveling mechanism and a uniform material distribution mechanism arranged sequentially along the material flow direction, the tobacco material on the conveyor belt is processed in two stages. The wedge-shaped leveling baffle of the leveling mechanism forces the accumulated material to disperse and initially level it, while the U-shaped uniform material distribution plate with a material trough of the uniform material distribution mechanism further refines the distribution and ensures continuous material passage. The synergistic effect of the two mechanisms fundamentally solves the problem of severely uneven material distribution in the width and thickness directions of the belt, laying the foundation for stable conveying.

[0017] A detection and control module, consisting of an ultrasonic thickness detection probe, a controller, and a frequency converter, works in conjunction with the material conveying mechanism to achieve real-time online detection of material thickness and dynamic closed-loop adjustment of the conveyor belt speed. Based on the real-time detected thickness signal and the preset target flow rate, the controller automatically calculates and adjusts the conveyor belt speed, forming a rapid response mechanism. This completely changes the passive situation of fixed or lagging belt speed adjustments in traditional methods, effectively preventing chain-reaction blockages caused by instantaneous material accumulation.

[0018] By organically combining the mechanical material leveling mechanism and the material equalization mechanism with the intelligent speed regulation of the detection and control module, the frequency of material blockage is significantly reduced, production interruptions and manual unblocking needs are greatly reduced, and production continuity and automation level are improved. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly of a material leveling device for a tobacco belt conveyor provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the flattening mechanism provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the material leveling mechanism provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the uniform material plate provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the detection control module provided in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram illustrating the combined use of an existing buffer cabinet, a DPH type belt conveyor, and a DUC type belt conveyor, as provided in Embodiment 1 of the present invention.

[0020] In the diagram: 1. DPH type with conveyor; 2. DUC type with conveyor; 3. Material leveling mechanism; 301. Material leveling baffle; 302. Support rod; 303. Swing arm; 4. Material leveling mechanism; 401. Material leveling plate; 402. Optical shaft; 403. Bushing; 404. Material feed chute; 5. Detection and control module; 501. Thickness detection probe; 502. Upright pole; 503. Horizontal bar; 504. Connecting rod; 505. Mounting base; 506. Connecting component; 6. Drive motor; 7. Buffer cabinet. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Example 1 In a typical embodiment of the present invention, a material leveling device for a tobacco belt conveyor is provided, comprising a material leveling mechanism 3, a material leveling mechanism 4, and a detection and control module 5; the material leveling mechanism 3 and the material leveling mechanism 4 are sequentially installed on a frame above the conveyor belt of the belt conveyor in the material conveying sequence; the detection and control module 5 includes a thickness detection probe 501, a controller, and a frequency converter; the thickness detection probe 501 is installed on the frame and located downstream of the material leveling mechanism 4; the detection end of the thickness detection probe 501 is oriented towards the belt bearing surface; the signal output end of the thickness detection probe 501 is connected to the signal input end of the controller; the control output end of the controller is connected to the control end of the frequency converter; and the power output end of the frequency converter is connected to the drive motor 6 of the belt conveyor.

[0023] In this embodiment, the belt conveyor adopts DPH type belt conveyor 1 and DUC type belt conveyor 2. The tobacco material from the buffer cabinet 7 is conveyed by setting DPH type belt conveyor 1 and DUC type belt conveyor 2. The leveling mechanism 3 is adapted to be installed on DPH type belt conveyor 1 and the leveling mechanism 4 is adapted to be installed on DUC type belt conveyor 2 to achieve leveling and conveying of the material.

[0024] With the material leveling mechanism 3 and the material leveling mechanism 4 arranged sequentially, the material first undergoes preliminary forced dispersion through the material leveling mechanism 3 of the DPH type belt conveyor 1, breaking up and spreading the accumulated clumps of material to solve the problem of uneven accumulation over a large area. Then, it enters the material leveling mechanism 4 of the DUC type belt conveyor 2 for material leveling and conveying, making the material layer more uniform. This two-stage processing can more thoroughly solve the problem of unevenness of material in the width and thickness directions of the belt, laying the foundation for subsequent accurate detection and control.

[0025] Secondly, the integration of the detection and control module 5 with the leveling mechanism 3 and the uniform material mechanism 4 forms a dynamic closed-loop system. The thickness detection probe 501, located downstream of the uniform material mechanism 4, accurately measures the actual thickness of the material after two stages of processing. Based on this thickness value and the preset material flow rate, the controller calculates in real time and instructs the frequency converter to adjust the speed of the drive motor 6, thereby changing the conveyor belt speed. This closed-loop control can respond instantly to fluctuations in material thickness, actively adjusting the belt speed to maintain stable flow, fundamentally changing the passive situation of fixed or lagging belt speed in traditional methods. It effectively prevents material blockage caused by instantaneous material accumulation and reduces the impact of flow fluctuations on subsequent processes.

[0026] The material leveling mechanism 3 includes a material leveling baffle 301 and a first adjusting bracket. The first adjusting bracket includes a support rod 302 and a swing arm 303. There are two support rods 302 respectively located on both sides of the frame. The two support rods 302 are respectively equipped with swing arms 303. The material leveling baffle 301 is installed between the two swing arms 303.

[0027] The support rod 302 is fixed to both sides of the frame to provide a stable foundation. The swing arm 303 connects the support rod 302 and the flat baffle 301. While obtaining reliable support, the flat baffle 301 has the ability to make fine adjustments to its angle and front and back position during installation through the swing arm 303. This makes it easy to optimize the working posture of the flat baffle 301 according to different belt tension or material characteristics, ensuring the flat material effect and reducing unnecessary friction.

[0028] The flat baffle 301 is configured as a wedge-shaped structure, with the tip of the flat baffle 301 positioned close to the conveyor belt. The angle between the flat baffle 301 and the belt surface of the conveyor belt is an acute angle, and the width of the flat baffle 301 is adapted to the effective width of the conveyor belt.

[0029] With this configuration, the wedge-shaped flat baffle 301 has an acute angle between its tip and the conveyor belt surface, which allows for gentle and even smoothing of materials of varying heights on the conveyor belt. This avoids the hard obstruction, material rebound, and agglomeration caused by vertical baffles. While effectively leveling the material, it significantly reduces material breakage caused by impact and scraping. The width of the flat baffle 301 is matched with the effective width of the conveyor belt, which can level the entire material on the conveyor belt and prevent material leakage.

[0030] The material leveling mechanism 4 includes a material leveling plate 401 with a U-shaped structure and a second adjusting bracket. The second adjusting bracket includes an optical axis 402 and a bushing 403. There are two optical axes 402 respectively located on both sides of the frame. The two optical axes 402 are respectively equipped with bushings 403, and the material leveling plate 401 is installed between the two bushings 403.

[0031] The optical axis 402 is vertically fixed on both sides of the frame, and the bushing 403 can slide up and down along the optical axis 402 and lock, so as to realize the precise and stable adjustment of the height of the uniform plate 401. The operator can easily adjust the uniform plate 401 to the position that matches the belt surface, thereby ensuring the consistency and reliability of the uniform effect.

[0032] The bottom of the leveling plate 401 is set as an arc structure and is adapted to the belt surface of the conveyor belt. The width of the leveling plate 401 is adapted to the effective width of the conveyor belt. A material passage groove 404 is opened on the plate body of the leveling plate 401 along the width direction. The included angle between the leveling plate 401 and the belt surface of the conveyor belt is an acute angle.

[0033] Understandably, the conveyor belt of the DUC-type belt conveyor 2 has an arc-shaped groove structure, and the bottom of the material leveling plate 401 is set as an arc-shaped protrusion structure, so that the bottom of the material leveling plate 401 matches the belt surface of the conveyor belt, enhancing the fit and reducing edge leakage. The material chute 404 allows a portion of the material to pass continuously, completely avoiding the risk of instantaneous material interruption caused by the complete blockage that may occur with the traditional material leveling plate 401, ensuring the continuity of material flow. The inclined installation of the material leveling plate 401 also has a forward guiding effect on the passing material, which, together with the material chute 404, makes the tobacco fibers more evenly distributed on the belt.

[0034] The thickness detection probe 501 is configured as an ultrasonic probe, which is mounted on the frame via a three-dimensional adjustable bracket.

[0035] Ultrasonic testing is non-contact, highly accurate, and unaffected by tobacco fiber dust. The three-dimensional adjustable bracket gives the probe high installation flexibility, allowing its position and angle to be adjusted in three directions in space according to the working conditions. This ensures that the ultrasonic beam is perpendicularly aligned with the belt bearing surface and avoids interference shadow areas from mechanical structures, thereby obtaining the most accurate and stable material thickness signal and providing an accurate data source for closed-loop control.

[0036] The controller is configured to receive the material thickness value detected in real time by the thickness detection probe 501, calculate the target running speed of the conveyor belt based on the material thickness value and the preset target flow rate value, the target running speed is inversely proportional to the material thickness value, and generate a frequency converter frequency adjustment signal according to the target running speed of the belt.

[0037] With this setup, when the material thickness is detected to increase, the belt conveyor automatically reduces its belt speed to prevent overloading of the conveying capacity per unit time; when the thickness decreases, the belt conveyor automatically increases its belt speed to avoid material breakage, thus achieving automated dynamic balance adjustment. The device has a fast overall response speed, precise adjustment, and can smoothly suppress flow fluctuations.

[0038] The adjustable support includes uprights 502, two of which are respectively mounted on both sides of the frame via connectors 506. A crossbar 503 is installed between the two uprights 502 via connectors 506. A connecting rod 504 is installed on the crossbar 503 via connectors 506. A mounting seat 505 is provided at the end of the connecting rod 504 away from the crossbar 503. A thickness detection probe 501 is provided on the mounting seat 505.

[0039] Understandably, the upright 502 and the connector 506, the crossbar 503 and the connector 506, the connecting rod 504 and the connector 506 and the mounting base 505 are connected by a detachable connection or a sliding connection with a certain pre-tightening force, which ensures stable connection and forms a three-dimensional adjustable support to realize the position of the thickness detection probe 501.

[0040] With this configuration, the spatial position and orientation of the thickness detection probe 501 have a wide range of adjustability and flexibility. The height, horizontal longitudinal position, and horizontal lateral position of the thickness detection probe 501 can be adjusted according to the actual working conditions, as well as its pitch angle can be finely adjusted until the detection point with the strongest and most stable signal is found. Then it is locked and fixed, ensuring that the optimal positioning of the thickness detection probe 501 can be achieved in any installation environment, which greatly improves the universality and detection reliability of the thickness detection probe 501.

[0041] The leveling mechanism 3 and the uniform material distribution mechanism 4 are configured as a modular structure, with an installation structure that can adapt to conveyor belts of different bandwidths.

[0042] With this configuration, the leveling mechanism 3 and the evenly distributing mechanism 4 are treated as a standardized unit. By replacing or adjusting some connecting parts, they can be quickly installed on belt conveyors of different specifications, simplifying the workflow of production line transformation and improving practicality.

[0043] In a second aspect of the invention, a method of using a leveling device for a tobacco belt conveyor is provided, comprising: The leveling mechanism 3 and the uniform material mechanism 4 are installed sequentially on the frame above the conveyor belt of the belt conveyor in the order of material conveying. During the operation of the belt conveyor, the thickness detection probe 501 continuously detects the thickness of the material on the conveyor belt after it has been processed by the leveling mechanism 3 and the uniform material mechanism 4, and generates a thickness signal. The controller receives the thickness signal and calculates the target running speed of the conveyor belt based on the real-time thickness signal and the preset flow target. The controller sends control commands related to the target running speed to the frequency converter, and the frequency converter adjusts the output frequency to change the speed of the drive motor 6, so that the running speed of the conveyor belt is adjusted accordingly.

[0044] In this embodiment, the material leveling mechanism 3 is configured such that: the material leveling baffle is made of 4mm thick 304 stainless steel, which is corrosion resistant and wear resistant; the included angle between the material leveling baffle 301 and the belt surface of the conveyor belt is configured as 30°±5°, thereby optimizing the material sliding trajectory; the width of the material leveling baffle 301 is 420mm, which matches the effective width of the conveyor belt of the DPH type belt conveyor 1.

[0045] The leveling mechanism 3 is mounted on the frame using bolt assemblies. The swing arm support rod 302 has multiple threaded holes for connecting with bolts. The height of the leveling baffle 301 can be coarsely adjusted according to the installation position of the different threaded holes. In addition, the support rod 302 also has an oblong hole, in which bolts are also installed. By adjusting the position of the bolts in the oblong hole, the height of the leveling baffle 301 is finally positioned and locked, realizing the adaptive adjustment of the leveling baffle 301 according to the actual working conditions. The bolts include M10 anti-loosening bolts, the height adjustment range is 40-120mm, and the accuracy is ±1mm. The leveling mechanism 3 is 250mm away from the outlet of the buffer cabinet to avoid interference with the baffle curtain.

[0046] The material leveling mechanism is configured as follows: a U-shaped material leveling plate 401 with a bottom material passage trough 404, the trough width of which is 15mm to avoid material breakage; a bottom arc length of 300mm to adapt to the curvature of the conveyor belt of the DUC type belt conveyor, and a thickness of 4mm; an optical shaft diameter of 12mm, a bushing tolerance of H7 / g6, a height adjustment accuracy of ±0.5mm, and an optimal height setting of 80mm; the included angle between the material leveling plate 401 and the belt surface of the conveyor belt is configured as 45°, so that the material passage trough has a certain inclination angle, which can smoothly pass the tobacco and prevent the tobacco from getting stuck; the surface of the material leveling plate 401 is mirror polished (Ra≤0.8μm) to reduce material adhesion.

[0047] The detection control module 5 is configured as follows: the thickness detection probe 501 adopts an ultrasonic probe, model BANNERT30UIPBQ, with a range of 150-2000mm, an accuracy of ±1mm, and an installation height of 730mm from the conveyor belt bearing surface; the three-dimensional adjustment range of the adjustable bracket is: X-axis ±50mm, Y-axis ±30mm, Z-axis ±20mm.

[0048] In actual use, the material leveling mechanism 3 is installed on the frame of the DPH type belt conveyor. Ensure that the material leveling baffle 301 is 250mm away from the outlet of the buffer cabinet 7. Adjust the bolt assembly to a height of 80mm and tighten the anti-loosening nut to reduce the material thickness on the conveyor belt from 40mm to 3-8mm. The material leveling mechanism 4 is installed on the frame of the DUC type belt conveyor. The optical shaft 402 is adjusted to a height of 80mm and locked with the bushing 403. The material chute 404 is aligned with the center line of the conveyor belt and tilted at an angle of 45° to reduce the frequency of material blockage. The detection control module 5 is installed on the frame of the DUC type belt conveyor via an adjustable bracket, and is positioned after the material leveling mechanism 4 according to the material conveying sequence. After three-dimensional adjustment according to the actual working conditions, the thickness detection probe 501 is positioned so that it faces the conveyor belt bearing surface.

[0049] The detection and control module 5 feeds back the thickness signal detected by the thickness detection probe 501 to the controller. The controller adjusts the frequency of the frequency converter of the belt conveyor according to the thickness signal, thereby controlling the running speed of the conveyor belt. The drive motor 6 has a rated power of 1.5KW and a rated current of 3.75A. The selected frequency converter is Danfoss FC-302P1K5T5E20H1XGCXXXSXXXXALBXCXXXXD0.

[0050] The specific calculation process is as follows: The formula for calculating the material conveying flow rate Q is:

[0051] in: Q: Material flow rate (kg / s), the goal is to keep it constant by adjusting the speed; W: Effective width of conveyor belt (m), compatible with DPH type belt conveyor 1 width and DUC type belt conveyor 2 width; H: Material thickness (m), detected in real time by an ultrasonic probe; V: Conveyor belt speed (m / s), adjusted by a frequency converter.

[0052] In order to maintain a constant flow rate (Target value, based on production process settings) The conveyor belt speed V must be inversely proportional to the material thickness H:

[0053] The inverter frequency f (in Hz) is directly proportional to the motor speed n (in rpm), and n is directly proportional to the conveyor belt speed V. ,in (This is the mechanical transmission constant), and the formula for the inverter output frequency is:

[0054] in: System constants, integrating , The mechanical parameters need to be calibrated via the controller; The inverter output frequency (Hz) represents the adjusted motor drive frequency, which directly affects the conveyor belt speed. The inverter is controlled by a controller, and its rated parameters are 1.5KW power and 3.75A current.

[0055] Material thickness (mm) is detected in real time by an ultrasonic probe (model BANNER T30UIPBQ), with a range of 150-2000mm and an accuracy of ±1mm. The speed is adjusted based on the thickness change, and the thickness is reduced to 3-8mm after leveling.

[0056] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A material leveling device for a tobacco belt conveyor, characterized in that, The system includes a leveling mechanism, a uniform material distribution mechanism, and a detection and control module. The leveling mechanism and the uniform material distribution mechanism are sequentially installed on a frame above the conveyor belt of the belt conveyor in the material conveying sequence. The detection and control module includes a thickness detection probe, a controller, and a frequency converter. The thickness detection probe is installed on the frame and located downstream of the uniform material distribution mechanism. The detection end of the thickness detection probe faces the belt bearing surface. The signal output end of the thickness detection probe is connected to the signal input end of the controller. The control output end of the controller is connected to the control end of the frequency converter. The power output end of the frequency converter is connected to the drive motor of the belt conveyor.

2. The material leveling device for a tobacco belt conveyor as described in claim 1, characterized in that, The material leveling mechanism includes a material leveling baffle, support rods, and swing arms. There are two support rods, which are respectively arranged on both sides of the frame. Each of the two support rods is equipped with a swing arm, and the material leveling baffle is installed between the two swing arms.

3. The material leveling device for a tobacco belt conveyor as described in claim 2, characterized in that, The flat baffle is configured as a wedge-shaped structure, with the tip of the flat baffle positioned close to the conveyor belt. The angle between the flat baffle and the belt surface of the conveyor belt is an acute angle, and the width of the flat baffle is adapted to the effective width of the conveyor belt.

4. The material leveling device for a tobacco belt conveyor as described in claim 1, characterized in that, The material leveling mechanism includes a U-shaped material leveling plate, optical shafts, and bushings. There are two optical shafts, which are respectively arranged on both sides of the frame. Each optical shaft is equipped with a bushing, and the material leveling plate is installed between the two bushings.

5. The material leveling device for a tobacco belt conveyor as described in claim 4, characterized in that, The bottom of the material leveling plate is set with an arc-shaped structure and is adapted to the belt bearing surface of the conveyor belt. The width of the material leveling plate is adapted to the effective width of the conveyor belt. A material passage groove is opened on the plate body along the width direction. The included angle between the material leveling plate and the belt surface of the conveyor belt is an acute angle.

6. The material leveling device for a tobacco belt conveyor as described in claim 1, characterized in that, The thickness detection probe is configured as an ultrasonic probe, which is mounted on the frame via a three-dimensional adjustable bracket.

7. The material leveling device for a tobacco belt conveyor as described in claim 1, characterized in that, The controller is configured to: receive the material thickness value detected in real time by the thickness detection probe, calculate the target running speed of the conveyor belt based on the material thickness value and the preset target flow rate value, wherein the target running speed is inversely proportional to the material thickness value, and generate a frequency converter frequency adjustment signal according to the target running speed of the belt.

8. A material leveling device for a tobacco belt conveyor as described in claim 6, characterized in that, The adjustable support includes two uprights, which are respectively mounted on both sides of the frame via connectors. A crossbar is installed between the two uprights via connectors. A connecting rod is installed on the crossbar via connectors. A mounting seat is provided at the end of the connecting rod away from the crossbar. A thickness detection probe is provided on the mounting seat.

9. A material leveling device for a tobacco belt conveyor as described in claim 1, characterized in that, The leveling mechanism and the evenly distributing mechanism are configured as a modular structure, with an installation structure that can adapt to conveyor belts of different bandwidths.

10. A method of using a material leveling device for a tobacco belt conveyor as described in any one of claims 1-9, characterized in that, include: The leveling mechanism and the evenly distributing mechanism are installed sequentially on the frame above the conveyor belt of the belt conveyor in the order of material conveying. During the operation of the belt conveyor, the thickness detection probe continuously detects the thickness of the material on the conveyor belt after it has been processed by the leveling mechanism and the uniformizing mechanism, and generates a thickness signal. The controller receives the thickness signal and calculates the target running speed of the conveyor belt based on the real-time thickness signal and the preset flow target. The controller sends control commands related to the target running speed to the frequency converter, and the frequency converter adjusts the output frequency to change the speed of the drive motor, so that the running speed of the conveyor belt is adjusted accordingly.

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