Automatic drying equipment based on tobacco planting

Abstract

The invention discloses automatic drying equipment based on tobacco planting, which comprises an outer drying chamber, two box doors hinged and mounted at the doorway position of the outer drying chamber through hinges, and a temperature control heating assembly mounted in the outer drying chamber, and is characterized in that a plurality of layers of profile frames are mounted in the outer drying chamber along the length direction; a multi-layer feeding conveying line is arranged in the multi-layer profile frame, and the running direction of the multi-layer feeding conveying line is parallel to the length direction of the outer drying chamber. The most heavy transferring and placing work is completed in the area of the doorway of the drying chamber, one worker is responsible for transferring the tobacco clamps on the ground, the other worker is responsible for receiving the tobacco clamps on the stable step frame and placing the tobacco clamps on the conveying line, labor division of the two workers is clear, the dangerous action that an operator needs to enter the deep position of the drying chamber and climbs in the moving process is avoided, and the working efficiency is improved. And repeated physical carrying is converted into mechanically executed standardized movement, the speed is higher, the rhythm is more stable, and the drying operation efficiency is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of tobacco drying technology, specifically to an automatic drying device based on tobacco cultivation. Background Technology

[0002] The main function of tobacco leaf drying equipment is to remove moisture from tobacco leaves to ensure they maintain good quality and prevent spoilage during storage and processing. This type of drying equipment typically consists of several parts, including a drying chamber, a heating system, a ventilation system, and a control system. The drying chamber is the core of the equipment, employing a sealed structure to ensure the circulation of hot air. The heating system provides the necessary heat source, commonly using electric heating or steam heating. The ventilation system is responsible for evenly distributing hot air into the drying chamber and removing moisture to ensure uniform heating of the tobacco leaves. In the actual drying process, workers evenly place the processed tobacco leaves on drying racks inside the drying chamber and set appropriate drying temperatures and times. During the drying process, workers need to regularly check the temperature and humidity inside the chamber to ensure the equipment is operating normally and adjust parameters as needed. Once the tobacco leaves reach the predetermined dryness level, workers stop the drying process and open the drying chamber to allow the leaves to cool naturally. As disclosed in the patent announcement CN218337693U, a tobacco leaf drying device has a sealed door on the front side of the housing, and air inlet and exhaust pipes on both sides. Multiple connecting parts are symmetrically arranged on both sides of the interior. A fixed vertical plate is fixedly connected to the inner wall of the housing. A support plate is located on the inner side of the lower end of the fixed vertical plate and is vertically fixed to it. A limiting block is located above the support plate. A pressure component is horizontally slidable on the upper surface of the limiting block near the fixed vertical plate, and multiple limiting grooves are horizontally arranged on the other side. The pressure component has an inverted U-shaped structure. Through the telescopic property of the electric telescopic rod, the limiting block moves horizontally above the support plate, thus facilitating adjustment according to the length of the tobacco leaf hanging rod during use. The distance between the limiting blocks in the two connecting parts is adjusted. It can be seen that the above technical solution uses the connecting parts to place the tobacco leaf hanging rods in the long and deep drying chamber, so that the tobacco leaves are suspended in the drying chamber. The internal space of the drying chamber is deep and often several meters high. In order to place the heavy hanging rods or tobacco clips that are already tied with wet tobacco leaves onto the upper guide rail, the operators usually need to use movable steps or platform carts to move in the narrow passage and constantly climb. Therefore, it is difficult to put the tobacco leaves on and take them off the shelves. In particular, the tobacco load in a standard dense curing barn often reaches hundreds of rods, which relies entirely on manual lifting for placement or removal, which is time-consuming. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic drying device based on tobacco cultivation. In this device, one worker is positioned at the entrance of the outer drying chamber via a stepped frame, while another worker hands a tobacco leaf arm holder containing fresh tobacco leaves to the worker on the stepped frame. Each tobacco leaf arm holder is placed layer by layer on a multi-layer feeding conveyor line. After each layer of tobacco leaves is loaded onto the frame, a rotary drive is activated via a touch screen to move the tobacco leaf arm holder a certain distance into the outer drying chamber, making room for the next tobacco leaf arm holder, until the loading operation is completed. This solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic drying device based on tobacco planting, comprising an outer drying chamber, two hinged doors installed at the entrance of the outer drying chamber, and a temperature control heating component installed inside the outer drying chamber. The outer drying chamber has a multi-layer profile frame installed along its length, and a multi-layer feeding conveyor line is installed inside the multi-layer profile frame. The running direction of the multi-layer feeding conveyor line is parallel to the length direction of the outer drying chamber. The multi-layer profile frame has several tobacco leaf arm-type clamps installed inside, which are detachably connected to the multi-layer feeding conveyor line. A rotary driver for outputting rotational power to the multi-layer feeding conveyor line is also installed on one inner wall of the outer drying chamber. A touch screen is installed on one outer wall of one of the doors, and the output end of the touch screen is electrically connected to the input end of the rotary driver and the temperature control heating component.

[0005] Preferably, the temperature control heating assembly includes several electric heating tube groups installed on the top wall and left and right inner walls of the outer drying chamber. The input end of the electric heating tube group is electrically connected to the output end of the touch screen. It also includes a temperature sensor installed on the outer wall of one of the chamber doors. The output end of the temperature sensor is wired to the input end of the touch screen.

[0006] Preferably, the top wall and the left and right inner walls of the outer drying chamber are all equipped with arc-shaped insulation panels.

[0007] Preferably, the multi-layer feeding conveyor line includes multiple front longitudinal shafts rotatably mounted at different height positions on one side of the multi-layer profile frame via bearing seats, and multiple rear longitudinal shafts rotatably mounted at different height positions on the other side of the multi-layer profile frame. Both ends of the rear longitudinal shafts and the front longitudinal shafts are fixed with sprockets. A chain is installed between two sprockets at the same horizontal height position. A right-angle hanger is fixed between two adjacent chain links. The tobacco leaf arm clamp is detachably installed between two right-angle hangers along the width direction of the outer drying chamber.

[0008] Preferably, the vertical distance between the centerlines of two adjacent front longitudinal axes in the vertical direction is 60cm to 80cm.

[0009] Preferably, the rotary drive includes a geared motor mounted on one outer wall of the multi-layer profile frame and a sprocket constant speed transmission group disposed on the other outer wall of the multi-layer profile frame and connected to multiple front longitudinal shafts in the vertical direction. The sprocket constant speed transmission group is used to keep the multiple front longitudinal shafts rotating at the same speed and in the same direction. The output shaft of the geared motor and one end of one of the front longitudinal shafts are fixedly connected by a coupling.

[0010] Preferably, the inner wall of one side of the outer drying chamber is provided with a notch for accommodating the geared motor, and the front longitudinal shaft is provided in three parts.

[0011] Preferably, the tobacco leaf arm clamp consists of a main clamping arm, a threaded adjustment structure, and a secondary clamping arm. The main clamping arm is inserted and installed between two right-angled hangers in the width direction of the outer drying chamber. The threaded adjustment structure is installed at the top of the main clamping arm, and the secondary clamping arm is installed on the threaded adjustment structure. The distance between the secondary clamping arm and the main clamping arm is adjusted by the threaded adjustment structure.

[0012] Preferably, the threaded adjustment structure includes a top frame fixed on both sides of the top of the outer drying chamber, a slide block slidably installed inside the top frame, and a nut pair fixed inside one of the slide blocks. A threaded shaft is rotatably installed inside one of the top frames, and the threaded shaft and the nut pair are threadedly engaged. The secondary clamping blade arm is fixed at the lower end of the two slide blocks.

[0013] Preferably, both ends of the main clamping blade arm are provided with C-shaped notches for insertion and engagement with the right-angle bracket, the right-angle bracket is provided with a limiting hole inside, and the top of the main clamping blade arm is equipped with a T-shaped positioning pin for insertion and engagement with the limiting hole.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows: This automatic drying equipment based on tobacco cultivation, through its structure which includes an external drying chamber, a temperature-controlled heating component, a multi-layer profile frame, a multi-layer feeding conveyor line, a tobacco leaf arm clamp, and a rotary drive, allows the most arduous tasks of passing and placing tobacco leaves to be completed in the area at the entrance of the drying chamber. One worker on the ground is responsible for delivering the tobacco clamps, while another worker on a stable stepped frame is responsible for receiving them and placing them on the conveyor line. The division of labor is clear, avoiding the dangerous actions of operators having to enter the depths of the drying chamber and climb while moving. This fundamentally eliminates the risks of slipping, falling, or colliding caused by narrow spaces, poor visibility, and climbing while carrying heavy loads. The working environment is also shifted from a stuffy interior to a relatively open one. The spacious and well-ventilated entrance fundamentally improves working conditions. Operators on the stepped racks only need to perform short horizontal placement movements, eliminating the need to laboriously lift heavy tobacco clips and precisely push them into the previously deep upper guide rails. Therefore, after each set of placements is completed, the entire row of tobacco clips can be automatically and synchronously moved one workstation into the drying chamber by activating the rotary drive via the touch screen, making room for the next set of tobacco clips. This process transforms repetitive manual handling into standardized movement executed by machinery, which is not only faster and more stable, ensuring drying efficiency, but also eliminates problems such as uneven spacing and misalignment that are easily caused when manually pushing tobacco rods into the deep chamber, laying a better physical foundation for the uniform penetration of subsequent drying airflow. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side cross-sectional view of the present invention. Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the external drying chamber of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the multi-layer profile frame of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the three-dimensional structure of the tobacco leaf arm-type clamp of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the three-dimensional structure of the tobacco leaf arm-type clamp of the present invention. Figure 2 ; Figure 9 For the present invention Figure 7 Enlarged structural diagram at point B.

[0016] In the diagram: 1. External drying chamber; 101. Arc-shaped insulation board; 102. Recess; 2. Door; 3. Temperature sensor; 4. Touch screen; 5. Multi-layer profile frame; 6. Electric heating tube assembly; 7. Multi-layer feeding conveyor line; 701. Front longitudinal shaft; 702. Rear longitudinal shaft; 703. Sprocket disc; 704. Chain; 705. Right-angle hanging bracket; 7051. Limiting hole; 8. Tobacco leaf arm clamp; 801. Main clamping leaf arm; 802. C-shaped recess; 803. T-shaped positioning pin; 804. Top frame; 805. Threaded shaft; 806. Slide seat; 807. Secondary clamping leaf arm; 808. Nut pair; 9. Rotary driver; 901. Gear motor; 902. Sprocket constant speed transmission assembly. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Example 1, by Figures 1 to 4 The present invention includes an outer drying chamber 1, two cabinet doors 2 hinged at the entrance of the outer drying chamber 1, and a temperature control heating assembly installed inside the outer drying chamber 1. The outer drying chamber 1 provides a closed and controllable environment, while the cabinet doors 2 serve as the entrance to the outer drying chamber 1 and have good sealing performance when closed to prevent the loss of heat and moisture. The interior of the outer drying chamber 1 is equipped with a multi-layer profile frame 5 along its length, and the interior of the multi-layer profile frame 5 is equipped with a multi-layer feeding conveyor line 7. The running direction of the multi-layer feeding conveyor line 7 is parallel to the length direction of the outer drying chamber 1. The interior of the multi-layer profile frame 5 is equipped with several tobacco leaf arm clamps 8, which are detachably connected to the multi-layer feeding conveyor line 7. A rotary driver 9 for outputting rotational power to the multi-layer feeding conveyor line 7 is also installed on one inner wall of the outer drying chamber 1. A touch screen 4 is installed on one outer wall of one of the chamber doors 2. The output end of the touch screen 4 is electrically connected to the input end of the rotary driver 9 and the temperature control heating component. The temperature control heating component includes several electric heating tube groups 6 installed on the top wall and left and right inner walls of the outer drying chamber 1. The input end of the electric heating tube group 6 is electrically connected to the output end of the touch screen 4. It also includes a temperature sensor 3 installed on the outer wall of one of the chamber doors 2. The output end of the temperature sensor 3 is wired to the input end of the touch screen 4. The top wall and the left and right inner walls of the outer drying chamber 1 are all equipped with arc-shaped insulation plates 101. When the tobacco leaves on the multi-layer feeding conveyor line 7 are dried using the temperature control heating components, the electric heating tube groups 6 on the top wall and side walls of the outer drying chamber 1 are activated by the touch screen 4. During this process, the temperature sensor 3 detects the temperature value inside the outer drying chamber 1 to provide a stable and uniform thermal environment. When the electric heating tube groups 6 are working, the arc-shaped insulation plates 101 achieve the purpose of heat preservation.

[0019] Example 2, based on Example 1, is... Figure 5 and Figure 6 As shown, the multi-layer feeding conveyor line 7 includes multiple front longitudinal shafts 701 rotatably mounted at different height positions on one side of the multi-layer profile frame 5 via bearing seats, and multiple rear longitudinal shafts 702 rotatably mounted at different height positions on the other side of the multi-layer profile frame 5. The vertical distance between the center axes of two adjacent front longitudinal shafts 701 in the vertical direction is 60cm to 80cm. Both ends of the rear longitudinal shaft 702 and the front longitudinal shaft 701 are fixed with sprocket discs 703. A chain 704 is installed between the two sprocket discs 703 at the same horizontal height. A right-angle bracket 705 is fixed between two adjacent chain links of the chain 704. The tobacco leaf arm clamp 8 is detachably installed between two right-angle brackets 705 along the width direction of the outer drying chamber 1. When the tobacco arm clamp 8 is gradually fed into the outer drying chamber 1 using the multi-layer feeding conveyor line 7, the rotary driver 9 outputs rotational power to each front longitudinal shaft 701. Then, the chain 704 is driven to rotate between the front longitudinal shaft 701 and the rear longitudinal shaft 702 through the sprocket disc 703. The chain 704 carries the tobacco arm clamp 8 through the right-angle hanger 705 to move, so that the workers can quickly and conveniently send the tobacco arm clamp 8 into the outer drying chamber 1, completely eliminating the dangerous operation of climbing and carrying heavy loads inside the drying chamber. The rotary drive 9 includes a geared motor 901 mounted on one side of the outer wall of the multi-layer profile frame 5 and a sprocket constant speed transmission group 902 set on the other side of the outer wall of the multi-layer profile frame 5 and connected to multiple front longitudinal shafts 701 in the vertical direction. The sprocket constant speed transmission group 902 is used to keep the multiple front longitudinal shafts 701 rotating at the same speed and in the same direction. The output shaft of the geared motor 901 and one end of one of the front longitudinal shafts 701 are fixedly connected by a coupling. A notch 102 is provided on one side of the inner wall of the outer drying chamber 1 for accommodating the geared motor 901. There are three front longitudinal shafts 701. The geared motor 901 installed in the notch 102 is controlled by the touch screen 4 to work. The output shaft of the geared motor 901 drives one of the front longitudinal shafts 701 to rotate, while the other front longitudinal shafts 701 obtain power input through the sprocket constant speed transmission group 902, thereby accurately moving each tobacco arm clamp 8 to the preset position and ensuring that each tobacco arm clamp 8 is evenly distributed on the multi-layer profile frame 5. After being driven by the rotary driver 9, the multi-layer feeding conveyor line 7 uses its mechanical uniform linear motion to replace the unstable action of manually pushing the tobacco rods into the deep curing barn, ensuring the uniform spacing of all tobacco arm clamps 8.

[0020] Example 3, based on Example 2, by Figure 8 and Figure 9 The tobacco leaf arm clamp 8 is described as consisting of a main clamping arm 801, a threaded adjustment structure, and a secondary clamping arm 807. The main clamping arm 801 is inserted and installed between two right-angled brackets 705 in the width direction of the outer drying chamber 1. The threaded adjustment structure is installed at the top of the main clamping arm 801, and the secondary clamping arm 807 is installed on the threaded adjustment structure. The distance between the secondary clamping arm 807 and the main clamping arm 801 is adjusted by the threaded adjustment structure. The threaded adjustment structure includes a top frame 804 fixed on both sides of the top of the outer drying chamber 1, a slide block 806 slidably installed inside the top frame 804, and a nut pair 808 fixed inside one of the slide blocks 806. A threaded shaft 80 is rotatably installed inside one of the top frames 804. 5. The threaded shaft 805 and the nut pair 808 are threaded together. The auxiliary clamping arm 807 is fixed at the lower end of the two slides 806. When the worker uses the tobacco arm clamp 8 to clamp the tobacco leaves, the upper end of the fresh tobacco leaves is placed in the gap between the auxiliary clamping arm 807 and the main clamping arm 801. After the fresh tobacco leaves are neatly arranged between the auxiliary clamping arm 807 and the main clamping arm 801, the worker rotates the threaded shaft 805. The threaded shaft 805 drives the nut pair 808, the slides 806 and the auxiliary clamping arm 807 to move towards the main clamping arm 801 until the auxiliary clamping arm 807 and the main clamping arm 801 firmly clamp the fresh tobacco leaves, ensuring that the fresh tobacco leaves can be in a stable hanging state during the subsequent drying process. Both ends of the main clamping blade arm 801 are provided with C-shaped notches 802 for insertion and engagement with the right-angle bracket 705. The right-angle bracket 705 has a limiting hole 7051 inside. The top of the main clamping blade arm 801 is equipped with a T-shaped positioning pin 803 for insertion and engagement with the limiting hole 7051. The tobacco arm clamp 8 containing fresh tobacco leaves needs to be installed between two chains 704 at the same height position. That is, the end of the main clamping blade arm 801 is inserted and engaged with the right-angle bracket 705 through the C-shaped notches 802. At this time, the T-shaped positioning pin 803 is not installed on the main clamping blade arm 801. After the main clamping blade arm 801 and the right-angle bracket 705 are assembled in place, the workers use the T-shaped positioning pin 803 to insert into the limiting hole 7051 to lock the right-angle bracket 705 and the main clamping blade arm 801 and ensure a stable connection between the two. When unloading tobacco leaves from the multi-layer feeding conveyor line 7, simply operate the tobacco leaf arm clamp 8 in the reverse order.

[0021] In this embodiment, the operator first neatly loads the harvested fresh tobacco leaves into the tobacco leaf arm holder 8 at the entrance area of ​​the outer drying chamber 1. Then, two workers cooperate outside the chamber door; one worker on the ground hands the loaded tobacco leaf arm holder 8 to a colleague standing on a stable step frame. The operator on the step frame then places the received tobacco leaf arm holder 8 one by one, steadily onto the multi-layer feeding conveyor line 7. Whenever the vertical space on the multi-layer feeding conveyor line 7 is filled with tobacco leaves… Once the arm-type grippers 8 are full, the operator issues a command via the touchscreen 4 to activate the rotary driver 9. The rotary driver 9 and the multi-layer feeding conveyor 7 then smoothly guide the multiple tobacco arm-type grippers 8, which are already in place, into the outer drying chamber 1 at a predetermined distance, thus freeing up space on the inlet conveyor line to receive the next batch of grippers. This process is repeated until all the tobacco arm-type grippers 8 are fed into the outer drying chamber in an orderly, uniform, and completely seamless manner, like a zipper. Inside the drying chamber 1, the tobacco leaves are ultimately positioned at a preset station on the multi-layer profile rack 5 by the rotary drive 9. After loading and tightly closing the door 2, the staff uses the touch screen 4 to set a drying process curve that matches the characteristics of the tobacco leaves. This involves the temperature control heating component managing the microclimate within the drying chamber 1. Once the touch screen 4 displays that the drying process has been completed and the tobacco leaves have been observed and confirmed to meet the process requirements, the staff waits for the temperature inside the drying chamber 1 to drop to a safe range and for the tobacco leaves to soften appropriately before unloading. During unloading, the rotary drive 9 is controlled by the touch screen 4 to gradually and segmentally convey the dried, aligned rows of tobacco leaf arm holders 8 from the multi-layer profile rack 5 inside the drying chamber 1 to the door. At a fixed position outside the door, the staff removes the tobacco leaf arm holders 8 layer by layer from the conveyor line and unloads the dried tobacco leaves for further processing. Throughout the entire unloading process, the staff operates in a safe and comfortable area, avoiding high-risk heavy-duty climbing operations in deep, stuffy, and confined spaces.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic drying device based on tobacco cultivation, comprising an outer drying chamber (1), two hinged doors (2) installed at the entrance of the outer drying chamber (1), and a temperature control heating assembly installed inside the outer drying chamber (1), characterized in that: The outer drying chamber (1) is equipped with a multi-layer profile frame (5) along its length, and the multi-layer profile frame (5) is equipped with a multi-layer feeding conveyor line (7). The running direction of the multi-layer feeding conveyor line (7) is parallel to the length direction of the outer drying chamber (1). The multi-layer profile frame (5) is equipped with several tobacco leaf arm clamps (8). The tobacco leaf arm clamps (8) are detachably connected to the multi-layer feeding conveyor line (7). A rotary driver (9) for outputting rotational power to the multi-layer feeding conveyor line (7) is also installed on one inner wall of the outer drying chamber (1). A touch screen (4) is installed on one outer wall of one of the doors (2). The output end of the touch screen (4) is electrically connected to the input end of the rotary driver (9) and the temperature control heating component.

2. The automatic drying equipment based on tobacco cultivation according to claim 1, characterized in that: The temperature control heating assembly includes several electric heating tube groups (6) installed on the top wall and left and right inner walls of the outer drying chamber (1). The input end of the electric heating tube group (6) is electrically connected to the output end of the touch screen (4). It also includes a temperature sensor (3) installed on the outer wall of one of the cabinet doors (2). The output end of the temperature sensor (3) is wired to the input end of the touch screen (4).

3. An automatic drying device based on tobacco cultivation according to claim 2, characterized in that: The top wall and the left and right inner walls of the outer drying chamber (1) are all equipped with arc-shaped insulation panels (101).

4. An automatic drying device based on tobacco cultivation according to claim 1, characterized in that: The multi-layer feeding conveyor line (7) includes multiple front longitudinal shafts (701) rotatably mounted at different height positions on one side of the multi-layer profile frame (5) via bearing seats and multiple rear longitudinal shafts (702) rotatably mounted at different height positions on the other side of the multi-layer profile frame (5). Both ends of the rear longitudinal shafts (702) and the front longitudinal shafts (701) are fixed with sprocket discs (703). A chain (704) is installed between two sprocket discs (703) at the same horizontal height position. A right-angle hanger (705) is fixed between two adjacent chain links of the chain (704). The tobacco leaf arm clamp (8) is detachably installed between two right-angle hangers (705) in the width direction of the outer drying chamber (1).

5. An automatic drying device based on tobacco cultivation according to claim 4, characterized in that: The vertical distance between the centerlines of two adjacent front longitudinal axes (701) in the vertical direction is 60cm to 80cm.

6. An automatic drying device based on tobacco cultivation according to claim 4, characterized in that: The rotary drive (9) includes a geared motor (901) mounted on one side of the outer wall of the multi-layer profile frame (5) and a sprocket constant speed transmission group (902) set on the other side of the outer wall of the multi-layer profile frame (5) and connected to multiple front longitudinal shafts (701) in the vertical direction. The sprocket constant speed transmission group (902) is used to keep the multiple front longitudinal shafts (701) rotating at the same speed and in the same direction. The output shaft of the geared motor (901) and one end of one of the front longitudinal shafts (701) are fixedly connected by a coupling.

7. An automatic drying device based on tobacco cultivation according to claim 6, characterized in that: The outer drying chamber (1) has a recess (102) on one side inner wall for accommodating the geared motor (901), and the front longitudinal shaft (701) is configured in three parts.

8. An automatic drying device based on tobacco cultivation according to claim 4, characterized in that: The tobacco leaf arm clamp (8) consists of a main clamping arm (801), a threaded adjustment structure, and a secondary clamping arm (807). The main clamping arm (801) is inserted between two right-angled hanging seats (705) in the width direction of the outer drying chamber (1). The threaded adjustment structure is installed at the top of the main clamping arm (801), and the secondary clamping arm (807) is installed on the threaded adjustment structure. The distance between the secondary clamping arm (807) and the main clamping arm (801) is adjusted by the threaded adjustment structure.

9. An automatic drying device based on tobacco cultivation according to claim 8, characterized in that: The threaded adjustment structure includes a top frame (804) fixed on both sides of the top of the outer drying chamber (1), a slide (806) slidably installed inside the top frame (804), and a nut pair (808) fixed inside one of the slides (806). A threaded shaft (805) is rotatably installed inside one of the top frames (804). The threaded shaft (805) and the nut pair (808) are threadedly engaged. The auxiliary clamping arm (807) is fixed at the lower end of the two slides (806).

10. An automatic drying device based on tobacco cultivation according to claim 8, characterized in that: Both ends of the main clamping blade arm (801) are provided with C-shaped notches (802) for insertion and engagement with the right-angle bracket (705). The right-angle bracket (705) is provided with a limiting hole (7051) inside. The top of the main clamping blade arm (801) is equipped with a T-shaped positioning pin (803) for insertion and engagement with the limiting hole (7051).

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