A tobacco moisture content balancing device

Abstract

The utility model relates to tobacco processing equipment technical field, concretely relates to a cut tobacco moisture content balancing device, install in the constant temperature and humidity environment of adjustable temperature and humidity, including annular conveyer belt and its drive mechanism, install the chain drive spreading mechanism and articulated scraper in the conveyer belt top and can along the reciprocating movement of conveyer belt direction moisture detector, and be used for controlling conveyer belt start -stop and scraper operation frequency's controller. The scraper realizes the switching of flat plate structure and turning -over material structure through pneumatic adjusting mechanism, can carry out even spreading and clumping to the tobacco layer and scatter; Moisture detector real -time dynamic monitoring cut tobacco moisture content, and the controller is according to detection data and preset target value, dynamic regulation conveyer belt and scraper operating parameter, realizes the intelligent regulation and control of moisture content. The utility model device has improved the efficiency and uniformity of cut tobacco moisture content regulation significantly, is applicable to the rapid moisture conditioning treatment of abnormal batch cut tobacco, improves the accuracy of evaluation and smoking test and the stability of cigarette product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of tobacco processing equipment, specifically to a tobacco moisture content balancing device. Background Technology

[0002] In the cigarette industry, the moisture content of tobacco shreds is one of the key factors affecting the stability of the rolling process and the sensory quality of the finished cigarettes. Appropriate moisture content not only determines whether the tobacco shreds can be smoothly transported and formed, but also directly relates to the combustion performance of the cigarette, the draw resistance, and the release rate of various components in the smoke. Therefore, precise control of the moisture content of tobacco shreds is of great significance throughout the entire cigarette manufacturing process.

[0003] In conventional production, after being processed by the tobacco processing technology, the tobacco shreds are continuously transported to the intermediate storage area and left to stand for a certain period of time under set temperature and humidity conditions to reach the expected moisture content equilibrium state. Then, they enter the rolling and splicing process. This process is highly automated and runs continuously, ensuring production efficiency and product consistency.

[0004] However, if equipment downtime, abnormal parameters, or raw material fluctuations occur during the tobacco processing, batches of tobacco with abnormal characteristics often result, such as uneven moisture content distribution and sensory attribute deviations. These "abnormal batches" of tobacco cannot be directly integrated into the main production line for processing, otherwise it will disrupt the production rhythm and pose a risk to the quality of cigarettes.

[0005] To determine whether such tobacco shreds are still usable, current processes typically involve manual sampling, hand-spreading, and natural acclimatization in a constant temperature and humidity environment, followed by test rolling and evaluation analysis. However, the traditional acclimatization method relies on manual operation, which is not only inefficient but also makes it difficult to achieve uniform moisture content in the tobacco shreds. This results in the actual moisture content of the tobacco shreds often deviating from the evaluation requirement range, thus affecting the objectivity and accuracy of the evaluation test results.

[0006] This application is submitted in order to address the above issues. Utility Model Content

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a tobacco moisture content balancing device to achieve rapid and uniform adjustment of tobacco moisture content, improve the accuracy and efficiency of moisture content control, and solve the problems of evaluation errors and quality fluctuations caused by the low efficiency and poor uniformity of traditional static humidification methods. This device is suitable for adjusting the moisture content of different batches of tobacco, especially for tobacco with large moisture content fluctuations. It can achieve rapid and uniform humidification in a short time, avoiding evaluation deviations or unstable cigarette quality caused by uneven moisture distribution, and significantly improving the accuracy of test data and the consistency of subsequent processing.

[0008] The technical solution adopted in this utility model is as follows:

[0009] This utility model provides a tobacco moisture content balancing device, which is installed in an environment with adjustable temperature and humidity. The device includes:

[0010] The conveying mechanism includes an annular conveyor belt 1, a first power unit for driving the conveyor belt 1 to reciprocate, and a support 2 for supporting the conveyor belt 1.

[0011] The spreading mechanism includes a chain drive mechanism 3 disposed above the conveyor belt 1, a second power unit for driving the chain drive mechanism 3, a cross plate 4 detachably connected to the chain 31 of the chain drive mechanism 3, and a scraper 5 hinged to the bottom of the cross plate 4. The scraper 5 is used to perform reciprocating scraping and spreading operations on the conveyor belt 1 to achieve uniform spreading and break up of clumps in the tobacco layer, ensuring the uniformity of tobacco layer thickness and moisture distribution.

[0012] The detection and control mechanism includes a moisture detector 6 that can reciprocate above the conveyor belt 1 in the conveying direction, and a controller that is signal-connected to the moisture detector 6, the first power unit, and the second power unit. The controller is configured to dynamically adjust and control the start-stop cycle of the conveyor belt 1 and the operating frequency of the scraper 5 based on the detection data collected by the moisture detector 6 and the preset target value.

[0013] Preferably, the controller is communicatively connected to the temperature and humidity control system, and can coordinately adjust the conveyor belt running speed, scraper operation frequency and ambient temperature and humidity parameters based on moisture detection data and preset target moisture content.

[0014] Preferably, the bracket 2 includes a support leg 31 and two support plates 22 respectively fixedly installed on the support leg 31. The support plates 22 are located on both sides of the conveyor belt 1 and are arranged parallel to the side of the conveyor belt 1 in the conveying direction, close to its edge, for lateral limiting of the tobacco.

[0015] A first flexible sealing strip is provided between the support plate 22 and the conveyor belt 1, extending along the conveying direction, to achieve lateral sealing and guidance without interfering with the operation of the conveyor belt, and to prevent tobacco from spilling out from the edge of the conveyor belt.

[0016] The chain drive mechanism 3 is mounted on the support plate 22 and is located above the conveyor belt 1.

[0017] Preferably, the scraper 5 has two back-to-back working structures at its end, namely:

[0018] Flat plate structure 51 is used to smooth the surface of the tobacco layer to ensure the surface flatness of the detection area of ​​the moisture detector 6.

[0019] The material-turning structure 52 includes a serrated structure 521 disposed at its free end and an arc-shaped concave surface 522 extending from and connected to the serrated structure 521 in a direction away from it. The serrated structure 521 is used to insert into the bottom layer of tobacco to break up clumps of tobacco, while the arc-shaped concave surface 522 flips the bottom tobacco to the upper layer during the reverse movement of the scraper to achieve uniform mixing of the tobacco.

[0020] Preferably, the scraper 5 is hinged to the bottom of the horizontal plate 4, and the angle of the scraper 5 is controlled by a pneumatic adjustment mechanism to realize the switching between the flat plate structure 51 and the material turning structure 52.

[0021] The pneumatic adjustment mechanism includes a guide seat 41 fixedly mounted on the horizontal plate 4 and a driving device. The fixed end of the driving device is mounted on the guide seat 41, and the moving end is hinged to the side wall of the scraper 5.

[0022] The scraper 5 is mounted on the bottom of the horizontal plate 4 via a hinge structure and can swing around its hinge axis; the actuation direction of the drive device forms an angle with the length direction of the scraper 5, and is used to push the scraper 5 to swing around the hinge axis during the extension and retraction process, thereby realizing the angle switching between the two working structures.

[0023] Preferably, the device further includes a sliding guide rail assembly 61 disposed above the conveyor belt 1, and a moisture detector 6 is mounted on the sliding guide rail assembly 61, which can move back and forth along the conveying direction of the conveyor belt 1 to realize dynamic moisture detection of multiple areas of the flattened tobacco layer.

[0024] The moisture detector 6 is located downstream of the working area of ​​the flat plate structure 51 of the scraper 5.

[0025] The sliding guide rail assembly 61 is mounted on a connecting beam 32 in the support structure 2. The connecting beam 32 is fixedly set between two support plates 31 and extends along the conveying direction of the conveyor belt 1. It is used to support the guide rail assembly and provide a structural reference for its operation. The sliding guide rail assembly 61 is a linear slide module, including a guide rail body mounted on the connecting beam 32, a movable stage set on the guide rail body, and a third power unit for driving the movable stage to reciprocate along the conveying direction. The moisture detector 6 is mounted on the movable stage and can dynamically detect the moisture content of the tobacco layer in multiple areas on the conveyor belt as it moves.

[0026] Preferably, a flip-up baffle 7 is provided above the inlet end and outlet end of the conveyor belt 1, respectively. The baffle 7 is hinged to the support plate 22 and can be erected during the operation of the scraper 5 to prevent the tobacco from overflowing during the flattening or turning process. A second flexible sealing strip 71 is provided at the bottom of the baffle 7, which fits against the end of the conveyor belt 1 when the baffle is closed, to buffer and prevent the tobacco from falling from the bottom gap.

[0027] The baffle 7 can be flipped to a horizontal or outward position for easy maintenance and cleaning. The baffle 7 is hinged to the frame on both sides and can be flipped to a horizontal or outward position for easy cleaning and maintenance of the conveying area. The limiting and fixing of its flipping angle can be achieved according to conventional structures in the field.

[0028] Preferably, the horizontal plate 4 is provided with a plurality of through holes, which open toward the surface of the conveyor belt 1 and are connected to the air intake main through an internal air cavity or connecting pipe. The air intake main is connected to an external compressed air source to perform directional blowing on the conveyor belt 1 to remove tobacco residue or impurities from its surface and keep the device clean.

[0029] Preferably, the annular conveyor belt 1 is a closed-loop belt structure, with its two ends respectively fitted onto axles arranged on both sides of the frame. One of the axles is driven to rotate by a first power unit to drive the conveyor belt 1 to achieve reciprocating circulation. A support structure, such as idlers, is provided below the running path of the conveyor belt 1 to prevent belt sagging and ensure smooth conveying.

[0030] Preferably, the first flexible sealing strip is a flexible rubber strip installed along the inner edge of the support plate 22, with its free end attached to the edge surface of the conveyor belt 1, for achieving floating sealing guidance during the operation of the conveyor belt.

[0031] Preferably, the driving device is a linear cylinder, with its cylinder body hinged to the guide seat 41 and the piston rod end hinged to the side wall of the scraper 5.

[0032] The tobacco moisture content balancing device provided by this utility model is installed in a constant temperature and humidity environment with adjustable temperature and humidity. It integrates functional modules such as automatic tobacco feeding, leveling and dispersing, moisture content detection, and intelligent control, aiming to achieve rapid and uniform moisture conditioning of abnormal batches of tobacco, and improve the accuracy and efficiency of moisture control. Its specific working process and working principle are as follows:

[0033] First, the tobacco shreds to be processed are evenly spread onto the circular conveyor belt 1 by external auxiliary devices or manual labor. Driven by the first power unit, the conveyor belt can perform orderly reciprocating motion during the spreading and final discharge stages of the tobacco shreds. After the tobacco shreds are spread, the conveyor belt remains stationary, allowing the tobacco shreds to obtain the necessary resting time on the conveyor belt, which is conducive to the uniform balance and stability of the moisture content.

[0034] During the resting period, the chain drive mechanism drives the scraper 5 mounted on the horizontal plate to intermittently perform reciprocating scraping and spreading operations. The scraper switches between a flat plate structure and a turning structure through a pneumatic adjustment mechanism, which is used to flatten the surface of the tobacco layer and break up and turn over the bottom layer of tobacco clumps, respectively. The movement of the scraper effectively breaks up the tobacco clumps, promotes the uniform distribution of moisture inside the tobacco, and ensures the humidity conditioning effect.

[0035] To prevent tobacco from overflowing at the inlet and outlet of the conveyor belt, the device is equipped with reversible baffles 7. During scraper operation, the baffles are in a vertically closed state, forming a physical barrier to prevent the tobacco from being pushed out of the conveyor belt. Simultaneously, the flexible sealing strip at the bottom of the baffle seals the gaps, preventing the tobacco from falling from the bottom of the baffle. When the conveyor belt is moving or stopped, the baffles can be flipped to a horizontal or outward-facing position for easy tobacco feeding and unloading, as well as equipment maintenance.

[0036] A moisture detector above the conveyor belt moves back and forth along a sliding guide rail, monitoring the moisture content of multiple areas of the tobacco layer in real time. The monitoring data is fed back to the controller, which dynamically adjusts the start-stop cycle of the conveyor belt and the scraper operation frequency according to the preset moisture content target, achieving precise control and uniform adjustment of the tobacco moisture content.

[0037] In addition, the controller can receive parameter signals from the environmental temperature and humidity control system, and adjust the operating rhythm of the conveyor belt and scraper, as well as environmental conditions, to ensure that the tobacco is uniformly humidified under optimal temperature and humidity. Through intermittent conveying, dynamic scraping and spreading, and coordinated environmental control, the moisture content of the tobacco gradually reaches equilibrium, significantly improving the efficiency and accuracy of humidity control.

[0038] After the moisture content is adjusted, the baffle is opened, the conveyor belt starts and transports the tobacco to the outlet, completing the discharge and collection.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. This utility model achieves automatic conveying, leveling, and dispersing of tobacco shreds through the coordinated linkage of a conveyor belt and a chain-driven scraper mechanism, effectively replacing the traditional humidification method that relies on manual operation. The leveling process is dynamic and controllable, which can significantly improve the efficiency and uniformity of tobacco moisture content adjustment. It is particularly suitable for rapid processing before smoking evaluation or pre-humidification of small batches of tobacco shreds, meeting the requirements of high efficiency and standardization.

[0041] 2. The device integrates a dynamic moisture detector and controller, enabling continuous online monitoring of the tobacco moisture content. Based on the detection results, it adjusts key parameters such as conveying speed, scraper operation frequency, and ambient temperature and humidity in a closed-loop adaptive control mechanism. This intelligent control system effectively reduces errors caused by human intervention and environmental fluctuations, ensuring that the tobacco remains within the target moisture content range during the conditioning process, thus improving the accuracy and representativeness of the smoking evaluation test.

[0042] 3. This device adopts a modular design. The scraper, moisture detection device, and conveying components are easy to disassemble, clean, and maintain. It can be independently deployed and operated in a temperature and humidity controlled environment, making it particularly suitable for centralized humidification treatment of "abnormal batches" of tobacco with large fluctuations in moisture content. By pre-treating outside the main production line, raw materials with uneven moisture content are prevented from directly entering subsequent processing, which helps stabilize product quality, improve the company's overall quality control level, and enhance production flexibility. Attached Figure Description

[0043] Figure 1 This is the first isometric view of the practical tobacco moisture content balancing device;

[0044] Figure 2 This is the second isometric view of the practical tobacco moisture content balancing device;

[0045] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0046] Figure 4 This is a diagram illustrating the working principle of the scraper.

[0047] Figure 5 This is a schematic diagram of the scraper structure;

[0048] Reference numerals: 1. Conveyor belt; 2. Support frame; 21. Support leg; 22. Support plate; 3. Chain drive mechanism; 31. Chain; 4. Horizontal plate; 41. Guide seat; 5. Scraper; 51. Flat plate structure; 52. Turning structure; 521. Sawtooth structure; 522. Arc-shaped concave surface; 6. Moisture detector; 61. Sliding guide rail assembly; 611. Guide rail body; 612. Moving table; 7. Baffle; 71. Second flexible sealing strip. Detailed Implementation

[0049] To more clearly illustrate the structure and working principle of the cigarette stripping device of this utility model, the following description, in conjunction with the accompanying drawings and specific operating procedures, uses a typical embodiment to further illustrate this utility model. However, those skilled in the art should understand that this does not constitute a limitation on the scope of protection of this utility model.

[0050] Example 1

[0051] like Figures 1 to 3 As shown, this utility model provides a tobacco moisture content balancing device, which is installed in a constant temperature and humidity environment with adjustable temperature and humidity. It mainly includes a conveying mechanism, a spreading mechanism, a detection and control mechanism, a limiting and anti-overflow structure, and an auxiliary cleaning structure.

[0052] The conveying mechanism includes a ring conveyor belt 1, a first power unit, and a support frame 2. The conveyor belt 1 has a closed-loop structure, with its two ends fitted onto the drive wheel axle and the driven wheel axle arranged on both sides of the frame. The drive wheel axle is connected to the first power unit to drive the conveyor belt 1 to achieve reciprocating cyclic operation.

[0053] The support frame 2 consists of four vertically arranged support legs 21. Two support legs 21 on each side are connected by a horizontal support plate 22. The two support plates 22 are arranged parallel to each other on both sides of the conveyor belt 1, close to the edge of the conveyor belt, for lateral restraint of the tobacco shreds. A first flexible sealing strip is installed on the inner side of the support plate 22, which floats and adheres to the edge of the conveyor belt during operation, serving as a guide and seal. A connecting beam is provided at the top of the support frame 2 for mounting the guide rail assembly and providing structural support.

[0054] The spreading mechanism is located above the conveyor belt 1 and mainly includes a chain drive mechanism 3, a second power unit, a horizontal plate 4, and a scraper 5 hinged to the bottom of the horizontal plate 4. The chain drive mechanism 3 consists of a sprocket, a chain, and a drive device. The sprocket shaft is fixedly mounted on the support plate 22 via bearings to ensure smooth rotation of the sprocket. The chain forms a closed transmission loop around the sprocket and reciprocates under the drive of the second power unit. The horizontal plate 4 is detachably connected to the chain 31 and moves reciprocally along the conveyor belt 1 with the chain, driving the scraper 5 hinged to its bottom to perform the spreading and turning of the tobacco shreds, achieving uniform spreading of the tobacco layer and breaking up clumps.

[0055] As a preferred embodiment, the second power unit may be a geared motor.

[0056] like Figure 4 , Figure 5 As shown, the scraper 5 is hinged to the bottom of the horizontal plate 4, and the free end has two working structures: a flat plate structure 51 and a turning structure 52. The flat plate structure 51 is a flat panel used to flatten the surface of the tobacco layer; the turning structure 52 is composed of a serrated structure 521 and an arc-shaped concave surface 522, used to insert into the bottom of the tobacco and turn over the bottom layer of tobacco when moving in the opposite direction.

[0057] The angle of the scraper 5 is controlled by a pneumatic adjustment mechanism, enabling switching between two operating structures. The pneumatic adjustment mechanism includes a guide seat 41 mounted on the horizontal plate 4 and a linear cylinder. The cylinder body is hinged to the guide seat 41, and the end of the piston rod is hinged to the side wall of the scraper 5. The extension and retraction of the cylinder drives the scraper to swing around its hinge axis, completing the angle switching.

[0058] The horizontal plate 4 is provided with several through holes, which open downwards and are connected to the main air intake. Compressed air source can be connected to blow the surface of the conveyor belt 1 in a directional manner to remove residual tobacco.

[0059] The detection and control mechanism includes a sliding guide rail assembly 61, a moisture detector 6, and a controller. The sliding guide rail assembly 61 is mounted on the connecting beam 32 of the bracket 2 and extends along the conveying direction. It is a linear slide module structure, including the guide rail body, a moving platform, and a third power unit. The moisture detector 6 is mounted on the moving platform and can move back and forth with the guide rail assembly along the conveying direction to dynamically detect multiple areas of the flattened tobacco layer.

[0060] The moisture meter 6 is positioned downstream of the working area of ​​the flat plate structure 51 of the scraper 5, and its detection data is fed back to the controller in real time. The controller is connected to the first, second, and third power units and can coordinate the start-stop rhythm of the conveyor belt, the working frequency of the scraper, and the movement rhythm of the moisture meter based on a preset target moisture content. The controller can also receive parameter signals from an external temperature and humidity control system to further coordinate environmental control and mechanical operation, thereby improving humidity control accuracy.

[0061] To prevent tobacco from overflowing at both ends of the conveyor belt, flip-up baffles 7 are installed above the inlet and outlet ends of the conveyor belt 1. The baffles 7 are hinged to the support plate 22 and can be flipped up to a vertical position during scraper operation to block material. A second flexible sealing strip 71 is provided at the bottom of the baffle 7 to seal the gap with the conveyor belt end and prevent tobacco from falling off. The baffles can be flipped to a horizontal or outward-facing position when needed, facilitating the feeding and unloading of tobacco and equipment maintenance and cleaning.

[0062] Working principle and process:

[0063] In use, the tobacco shreds to be treated are evenly spread on the surface of conveyor belt 1 by manual labor or external auxiliary mechanisms. The first power unit drives the conveyor belt 1 to move a short distance to assist in spreading the material. Then the conveyor belt stops running and enters the tobacco shred resting stage, which facilitates the initial diffusion and equilibrium of the moisture content in the tobacco shred layer.

[0064] During the resting period, the second power unit drives the chain transmission mechanism 3 to operate, which in turn drives the horizontal plate 4 and the scraper 5 below it to perform reciprocating short-stroke operations. The scraper 5 switches between a flat plate structure 51 or a turning structure 52 according to the operation stage and the state of the tobacco, so as to respectively complete the actions of flattening the surface of the tobacco and breaking up and turning the bottom layer of tobacco, effectively preventing the accumulation of tobacco clumps and promoting the uniform distribution of moisture in the tobacco layer.

[0065] During scraper operation, the baffles 7 at the inlet and outlet remain vertically closed, effectively preventing tobacco from spilling out in conjunction with the sealing strip structure. Driven by the sliding guide rail assembly 61, the moisture detector 6 reciprocates along the conveying direction, detecting the moisture content of the tobacco at different locations in real time. The detection results are transmitted to the controller, which dynamically adjusts the start-stop cycle of the conveyor belt 1 and the operating frequency of the scraper 5 based on the deviation from the set moisture content target.

[0066] Once the moisture content of the tobacco reaches the set value, the baffle 7 is manually or controlled by the controller to open, and the conveyor belt 1 starts to transport the conditioned tobacco to the outlet for collection. Through a combination of intermittent conveying, dynamic scraping and spreading, and closed-loop control, uniform adjustment and intelligent control of the tobacco moisture content are achieved, effectively improving the efficiency and consistency of tobacco conditioned treatment.

[0067] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this application; the dimensions described in the drawings and embodiments are not related to the specific physical object and are not used to limit the protection scope of this application. The physical dimensions can be selected and changed according to actual needs.

Claims

1. A tobacco moisture content balancing device, installed in an environment with adjustable temperature and humidity, characterized in that, The device includes: The conveying mechanism includes an annular conveyor belt (1), a first power unit for driving the conveyor belt (1) to reciprocate, and a support (2) for supporting the conveyor belt (1). The spreading mechanism includes a chain drive mechanism (3) disposed above the conveyor belt (1), a second power unit for driving the chain drive mechanism (3) to run, a cross plate (4) detachably connected to the chain (31) of the chain drive mechanism (3), and a scraper (5) hinged to the bottom of the cross plate (4). The scraper (5) is used to perform reciprocating scraping and spreading operations on the tobacco layer on the conveyor belt (1). The detection and control mechanism includes a moisture detector (6) capable of reciprocating above the conveyor belt (1) in the conveying direction, and a controller connected to the moisture detector (6), the first power unit and the second power unit. The controller is configured to dynamically adjust and control the start-stop cycle of the conveyor belt (1) and the operating frequency of the scraper (5) based on the detection data collected by the moisture detector (6) and the preset target value.

2. The tobacco moisture content balancing device according to claim 1, characterized in that, The bracket (2) includes a support leg (21) and two support plates (22) respectively fixedly installed on the support leg (21). The support plates (22) are located on both sides of the conveyor belt (1) and are arranged parallel to the side of the conveyor belt (1) in the conveying direction and close to the edge of the conveyor belt (1). A first flexible sealing strip is provided between the support plate (22) and the conveyor belt (1), extending along the conveying direction, to achieve lateral sealing and guidance without interfering with the operation of the conveyor belt, and to prevent tobacco from spilling out from the edge of the conveyor belt; The chain drive mechanism (3) is mounted on the support plate (22) and located above the conveyor belt (1).

3. The tobacco moisture content balancing device according to claim 1, characterized in that, The scraper (5) is provided with two back-to-back working structures at its end, namely: A flat plate structure (51) is used to smooth the surface of the tobacco layer to ensure the surface flatness of the detection area of ​​the moisture detector (6); The material turning structure (52) includes a serrated structure (521) disposed at its free end and an arc-shaped concave surface (522) extending from and connected to the serrated structure (521) in the opposite direction. The serrated structure (521) is used to insert into the bottom layer of tobacco to break up the clumps of tobacco, while the arc-shaped concave surface (522) turns the bottom tobacco to the upper layer during the reverse movement of the scraper to achieve uniform mixing of tobacco.

4. The tobacco moisture content balancing device according to claim 1, characterized in that, The scraper (5) is hinged to the bottom of the horizontal plate (4) and the angle of the scraper (5) is controlled by a pneumatic adjustment mechanism to realize the switching between the flat plate structure (51) and the material turning structure (52); The pneumatic adjustment mechanism includes a guide seat (41) fixedly mounted on the horizontal plate (4) and a driving device. The fixed end of the driving device is mounted on the guide seat (41), and the moving end is hinged to the side wall of the scraper (5). The scraper (5) is mounted on the bottom of the horizontal plate (4) via a hinge structure and can swing around its hinge axis; the actuation direction of the drive device forms an angle with the length direction of the scraper (5) and is used to push the scraper (5) to swing around the hinge axis during the extension and retraction process, thereby realizing the angle switching between the two working structures.

5. The tobacco moisture content balancing device according to claim 1, characterized in that, The device also includes a sliding guide rail assembly (61) disposed above the conveyor belt (1), and a moisture detector (6) is installed on the sliding guide rail assembly (61) and can move back and forth along the conveying direction of the conveyor belt (1) to realize dynamic moisture detection of multiple areas of the flattened tobacco layer. The moisture detector (6) is located downstream of the working area of ​​the flat plate structure (51) of the scraper (5).

6. The tobacco moisture content balancing device according to claim 1, characterized in that, The inlet and outlet ends of the conveyor belt (1) are respectively provided with a reversible baffle (7). The baffle (7) is hinged to the support plate (22) and can be erected during the operation of the scraper (5) to prevent the tobacco from overflowing during the flattening or turning process. The bottom of the baffle (7) is provided with a second flexible sealing strip (71), which fits against the end of the conveyor belt (1) when the baffle is closed, and is used to buffer and prevent tobacco from falling from the bottom gap; The baffle (7) can be flipped to a horizontal or outward position for easy maintenance and cleaning.

7. The tobacco moisture content balancing device according to claim 1, characterized in that, The horizontal plate (4) is provided with multiple through holes, which open toward the surface of the conveyor belt (1) and are connected to the air intake main through an internal air cavity or connecting pipe. The air intake main is connected to an external compressed air source to directionally blow the conveyor belt (1) to remove tobacco residue or impurities from its surface and keep the device clean.

8. The tobacco moisture content balancing device according to claim 1, characterized in that, The annular conveyor belt (1) is a closed-loop belt structure with its two ends respectively fitted onto axles arranged on both sides of the frame. One of the axles is driven to rotate by the first power unit to drive the conveyor belt (1) to achieve reciprocating circulation.

9. The tobacco moisture content balancing device according to claim 2, characterized in that, The first flexible sealing strip is a flexible rubber strip installed along the inner edge of the support plate (22), with its free end attached to the edge surface of the conveyor belt (1) to achieve floating sealing guidance during the operation of the conveyor belt.

10. The tobacco moisture content balancing device according to claim 4, characterized in that, The driving device is a linear cylinder, the cylinder body of which is fixedly installed on the guide seat (41), and the piston rod end is hinged to the side wall of the scraper (5).

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