Dendrobium officinale drying, temperature control and dehumidification device

Abstract

The invention relates to the technical field of natural product drying, and discloses a dendrobium officinale drying, temperature control and dehumidification device which comprises a drying box, a top hot air pipe for introducing hot air, and a bottom control assembly as a core power source. In the control assembly, a top air inlet window of a spherical shell and a hot air pipe are coaxially in butt joint with hot air, and a bottom ball supporting structure enables the spherical shell to rotate flexibly. The internal negative-pressure fan blades are driven by the motor to rotate, air in the spherical shell is exhausted through centrifugal force, a negative-pressure environment is formed, external hot air is promoted to flow in through the air inlet window, meanwhile, the elastic force of an elastic piece coil spring at the air exhaust window is overcome, the sealing plate is pushed to be opened, and the hot air flows into an air guide cavity formed by the air guide outer ring and the inner ring; hot air is uniformly dispersed to the periphery of the box body through the annular flow guide structure, and through active suction and annular flow guide, the hot air penetrates through materials at a stable flow speed, the temperature and humidity gradient of the center and the edge is eliminated, the center is prevented from being wet and mildewed, the edge is prevented from being excessively dry, and it is ensured that dendrobium officinale evaporates water uniformly at the low temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of natural product drying, and in particular to a temperature-controlling and dehumidifying device for drying Dendrobium officinale. Background Art

[0002] As a rare Chinese medicinal herb, Dendrobium officinale's drying process demands temperature, humidity, and airflow distribution that exceed those of standard agricultural product processing. Traditional drying equipment generally employs a passive airflow model with top or side airflow. This model relies on natural convection and diffusion of hot air through the material layer due to density differences. This model exhibits significant drawbacks in practical applications: when hot air flows vertically or horizontally through the pile of Dendrobium officinale, the physical barrier of the material layer causes the airflow velocity in the center to decrease sharply, forming a high-humidity stagnation zone. Meanwhile, the airflow around the edges near the air inlet remains high due to insufficient air buffering, resulting in excessive evaporation.

[0003] This non-uniform drying phenomenon of "slow in the center and fast at the edge" causes multiple negative effects on the physical and chemical properties of the medicinal materials: the active ingredients contained in Dendrobium officinale, such as dendrobium polysaccharides, will experience molecular structure degradation due to the local high temperature in the edge area, which will directly weaken the efficacy of the medicinal materials; the high humidity environment in the center provides a breeding ground for mold growth, especially during the long drying process, the middle layer of materials is prone to mildew due to microbial reproduction; what's worse, the hardened layer formed by the rapid drying of the epidermis will hinder the migration of internal moisture to the surface, forming an unfavorable state of "dry outside and wet inside", which will not only prolong the overall drying cycle, but also cause the medicinal materials to deteriorate due to internal moisture back osmosis during storage.

[0004] Existing technologies attempt to optimize the drying effect by adding guide plates to change the direction of airflow, but such improvements still remain in the category of passive regulation: the guide plates can only make limited corrections to the local flow field and cannot break through the physical limitations of radial airflow imbalance; technical bottlenecks cause the appearance of dried Dendrobium officinale to show differences between the edge and the center, the content of medicinal ingredients fluctuates significantly, and the yield is difficult to improve due to mold and over-drying losses, which is simply unable to meet the requirements of modern Chinese medicine high-standard processing for medicinal material uniformity and effectiveness. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the hot air in the drying equipment in the prior art is unevenly distributed. To this end, we propose a temperature-controlled and dehumidifying device for drying Dendrobium officinale.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a temperature-controlled and dehumidifying device for drying and drying Dendrobium officinale, comprising a drying box, a hot air pipe being fixedly connected to the top of the drying box, a control component being arranged at the bottom of the inner cavity of the drying box, the control component comprising a spherical shell, an air inlet window being provided at the top of the spherical shell, the air inlet window coinciding with the axis of the hot air pipe, a plurality of negative pressure fan blades being arranged inside the spherical shell, a wind gathering chamber being formed inside the spherical shell, a plurality of exhaust windows being provided around the spherical shell, a closing plate being fixed with elastic parts inside the exhaust window, an outer air guide ring and an inner air guide ring being fixedly connected to the outer surface of the spherical shell, the exhaust window being arranged between the outer air guide ring and the inner air guide ring, and a wind guide chamber being formed between the outer air guide ring and the inner air guide ring.

[0007] Preferably, a door is hingedly connected to one side of the opening of the drying box.

[0008] Preferably, the bottom of the spherical shell is fixedly connected to a mounting ring, and a plurality of distributed balls are installed on the bottom of the mounting ring.

[0009] Preferably, a support ring is provided at the bottom of the assembly ring, the top of the support ring contacts the ball, and the bottom of the support ring is fixedly connected to the bottom of the inner cavity of the drying box.

[0010] Preferably, one end of the plurality of negative pressure fan blades close to the center of the spherical shell is fixedly connected to a fixed roller, and a motor is provided at the bottom of the fixed roller.

[0011] Preferably, a fixing seat is sleeved on the surface of the motor, the bottom of the fixing seat is fixedly connected to the bottom of the drying box cavity, the output end of the motor is fixedly connected to a driving roller, and the top of the driving roller is fixedly connected to the fixing roller.

[0012] Preferably, the plurality of exhaust windows are evenly distributed around the axis of the spherical shell, the cross-sections of the outer air guide ring and the inner air guide ring are both arc-shaped structures, and the distance between the two gradually expands from the exhaust window outward to form an expanded air guide chamber.

[0013] Preferably, fixed cylinders are provided on both sides of the exhaust window, one end of the fixed cylinder is fixedly connected to the outer surface of the spherical shell, and the two fixed cylinders are symmetrically distributed along the axis of the exhaust window.

[0014] Preferably, the fixed cylinder is provided with a rotating roller, and both ends of the rotating roller are rotatably connected to the bottom of the inner cavity of the fixed cylinder on both sides.

[0015] Preferably, a connecting seat is fixedly connected to one side of the closing plate close to the rotating roller, an assembly hole is opened on the surface of the connecting seat and the connecting seat is fixed to the surface of the rotating roller through the assembly hole.

[0016] Technical effects and advantages of the present invention: The present invention provides a temperature-controlled dehumidification device for drying and drying Dendrobium officinale. The main drying box allows for convenient access to materials through a door, a hot air pipe at the top introduces hot air, and a control assembly at the bottom serves as the core power source. In the control assembly, the air inlet window at the top of the spherical shell is coaxially connected to the hot air pipe to connect the hot air, and a ball bearing support structure at the bottom enables the spherical shell to rotate flexibly; the internal negative pressure fan blades are driven to rotate by an electric motor, and the air in the spherical shell is discharged by centrifugal force, forming a negative pressure environment, prompting external hot air to flow in through the air inlet window, while overcoming the elastic force of the elastic spring at the exhaust window, pushing the closing plate to open, and allowing the hot air to flow into the air guide chamber formed by the outer and inner air guide rings, and then evenly dispersed to the surrounding area of ​​the box through the annular guide structure.

[0017] The closing plate driven by elastic parts has the advantage of dynamic sealing: it is tightly closed in the initial state to prevent hot air from escaping, maintain the temperature inside the box and reduce energy consumption; it automatically adjusts the opening degree as the negative pressure inside the spherical shell changes. When the negative pressure is large, the opening angle is large and the exhaust volume increases. When the negative pressure is small, it resets and reduces the exhaust volume, achieving an adaptive balance between the exhaust volume and the airflow pressure to avoid unstable airflow.

[0018] This system breaks the traditional passive diffusion model through active suction and annular diversion, allowing hot air to penetrate the material at a steady rate, eliminating temperature and humidity gradients between the center and the edges. This prevents both dampness and mildew in the center and excessive drying at the edges, ensuring uniform evaporation of moisture from the Dendrobium officinale at low temperatures. This design balances the preservation of the medicinal material's active ingredients, shortens the drying cycle, and reduces energy consumption, achieving precise control and efficient optimization of the drying process from both structural and functional aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the drying oven of the present invention; Figure 3 This is a schematic diagram of the control component structure of the present invention; Figure 4 This is a schematic diagram of the assembly structure of the negative pressure fan blade and the spherical shell of the present invention; Figure 5 This is a schematic diagram of the explosion structure of the control component of the present invention; Figure 6 This is a schematic structural diagram of the control assembly explosion from a second perspective of the present invention; Figure 7 It is a schematic diagram of the assembly structure of the closing plate and the exhaust window of the present invention.

[0020] Legend: 1. Drying box; 101. Box door; 2. Hot air duct; 3. Control component; 301. Ball shell; 302. Air inlet window; 303. Assembly ring; 304. Ball; 305. Support ring; 306. Negative pressure fan blade; 307. Fixed roller; 308. Motor; 309. Drive roller; 310. Exhaust window; 311. Closing plate; 312. Fixed cylinder; 313. Rotating roller; 314. Coil spring; 315. Connecting seat; 316. Assembly hole; 317. Air guide outer ring; 318. Air guide inner ring. DETAILED DESCRIPTION

[0021] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0022] Reference Figures 1 to 7 As shown, the present invention provides a technical solution: a temperature-controlled and dehumidifying device for drying Dendrobium officinale, comprising a drying oven 1, a door 101 hingedly connected to one side of the drying oven 1's opening, a hot air duct 2 fixedly connected to the top of the drying oven 1, and a control assembly 3 disposed at the bottom of the drying oven 1's inner cavity. The drying oven 1 serves as the main bearing space, and its opening is hingedly connected to the door 101 to facilitate the loading and unloading of materials. The hot air duct 2 at the top is responsible for introducing external hot air.

[0023] The control assembly 3 comprises a spherical shell 301, with an air inlet window 302 at its top, aligned with the axis of the hot air pipe 2. A mounting ring 303 is fixedly attached to the bottom of the shell 301, with multiple distributed balls 304 mounted on its bottom. A support ring 305 is also provided at its bottom, with the top of the support ring 305 in contact with the balls 304 and the bottom of the support ring 305 fixedly connected to the bottom of the drying chamber 1. The control assembly 3 at the bottom of the inner cavity is the core power unit. The air inlet window 302 at the top of the shell 301 in the control assembly 3, aligned with the axis of the hot air pipe 2, ensures that hot air can enter the shell 301 directly. Multiple balls 304 are mounted on the bottom of the shell 301 via the mounting ring 303. These balls 304 contact the support ring 305, which is fixed to the bottom of the drying chamber 1. This allows the shell 301 to rotate flexibly during subsequent operation, laying the foundation for dynamic regulation of the internal airflow. In the initial state inside the spherical shell 301, the exhaust window 310 is driven by the coil spring 314 to keep the closing plate 311 closed. This design can prevent the hot air from escaping without being fully utilized, and reserve the starting conditions for subsequent active airflow control.

[0024] Furthermore, multiple negative pressure blades 306 are provided inside the spherical shell 301, forming a wind gathering chamber inside the spherical shell 301. A fixed roller 307 is fixedly connected to one end of the multiple negative pressure blades 306 near the center of the spherical shell 301. A motor 308 is provided at the bottom of the fixed roller 307. A fixed seat is sleeved on the surface of the motor 308, and the bottom of the fixed seat is fixedly connected to the bottom of the inner cavity of the drying box 1. A drive roller 309 is fixedly connected to the output end of the motor 308, and the top of the drive roller 309 is fixedly connected to the fixed roller 307. When the device is started, the motor 308 starts working, and the drive roller 309 at its output end drives the rotating roller 313 to rotate, thereby causing the multiple negative pressure blades 306 fixed to the rotating roller 313 to rotate at high speed. The rotation of the negative pressure blades 306 forms a wind gathering chamber inside the spherical shell 301, and by actively sucking hot air from the central area, a negative pressure environment is formed in that area.

[0025] At the same time, a plurality of exhaust windows 310 are provided around the spherical shell 301, and the plurality of exhaust windows 310 are evenly distributed around the axis of the spherical shell 301. The exhaust window 310 has a built-in closing plate 311 fixed with an elastic member. Fixed cylinders 312 are provided on both sides of the exhaust window 310, and one end of the fixed cylinder 312 is fixedly connected to the outer surface of the spherical shell 301. The two fixed cylinders 312 are symmetrically distributed along the axis of the exhaust window 310. A rotating roller 313 is built into the fixed cylinder 312, and the two ends of the rotating roller 313 are rotatably connected to the bottom of the inner cavity of the fixed cylinder 312 on both sides. A connecting seat 315 is fixedly connected to the side of the closing plate 311 close to the rotating roller 313, and an assembly hole 316 is provided on the surface of the connecting seat 315 that passes through it. The connecting seat 315 is fixed to the surface of the rotating roller 313 through the assembly hole 316. The rotation of the fan blades does not directly "draw in" air, but instead throws out the air in the spherical shell 301 through centrifugal force (discharged through the exhaust window 310), resulting in the internal air pressure being lower than the external air pressure. At this point, the hot air at the air inlet window 302 automatically flows into the spherical shell 301 under the pressure of atmospheric pressure, replenishing the exhausted air. The previously closed sealing plate 311 rotates around the rotating roller 313 under the pressure of the ejected air, and the exhaust window 310 opens accordingly. The extracted, high-humidity, hot air is no longer confined to the central area, but instead gains the power to diffuse in all directions. This active extraction method breaks away from the passive model of traditional drying equipment that relies on the natural diffusion of hot air, creating a core driving force for even airflow distribution.

[0026] The outer air guide ring 317 and inner air guide ring 318, fixedly connected to the outer surface of the spherical shell 301, both feature an arcuate cross-section. This arcuate profile follows an aerodynamically streamlined design, effectively reducing turbulent losses during airflow and ensuring smoother and more stable flow of hot air within the air guide chamber. The spacing between the two gradually increases from the exhaust window 310 outward, forming a bell-shaped, flared air guide chamber structure. This gradual spatial arrangement allows the hot air, which is discharged at high speed from the exhaust window 310, to diffuse outward along the air guide chamber, naturally decreasing its velocity due to the gradually increasing cross-sectional area, creating a "center-gathering-edge-buffering" airflow balancing mechanism. The air guide chamber formed by the outer air guide ring 317 and inner air guide ring 318 converts the pulsed airflow at the exhaust window 310 into laminar airflow at the outer edge of the chamber, ensuring that the hot air velocity deviations in various areas within the drying chamber are kept to a minimal range. This ensures uniform penetration of the Dendrobium officinale material layer and eliminates the radial temperature difference problem of traditional drying equipment at the flow field distribution level.

[0027] When the exhaust window 310 is opened, the negative pressure hot air in the air collection chamber quickly flows into the air guide chamber, and with the help of the annular guide structure of the air guide outer ring 317 and the inner ring, the hot air is evenly dispersed to the surrounding space of the drying box 1. This annular guide design has unique advantages. It allows the high-speed concentrated central hot air to be effectively buffered and evenly distributed when entering the air guide chamber, avoiding the problem of uneven air flow caused by direct diffusion. The dispersed hot air penetrates the material layer at a stable flow rate, and each area from the center to the edge can obtain uniform heat exchange, thereby effectively eliminating the temperature and humidity gradient difference between the center and the edge of the drying box 1, so that each part of the Dendrobium officinale can be in a relatively consistent temperature and humidity environment during the drying process.

[0028] Compared to a directly open closing plate 311, a spring-driven closing plate 311 offers several advantages in actual operation. First, the spring (e.g., coil spring 314) keeps the closing plate 311 tightly closed in its initial state, forming a dynamic seal. This prevents premature escape of unused hot air, maintaining temperature stability within the drying oven 1 while minimizing heat loss and ultimately reducing energy consumption. This "passive sealing, active opening" mechanism achieves preliminary airflow control without requiring an additional power source, making it more energy-efficient than a fixed opening design that opens directly.

[0029] The elastic force of the elastic member forms a dynamic balance with the opening range of the exhaust window 310. When the negative pressure inside the spherical shell 301 increases, the elastic member is compressed, the opening angle of the sealing plate 311 increases, and the amount of hot air discharged increases accordingly. When the negative pressure decreases, the elastic member returns to its original position, pushing the sealing plate 311 to reduce its opening angle, thereby reducing the discharge of hot air. This adaptive adjustment mechanism enables the device to automatically adjust the exhaust volume according to the actual airflow pressure during operation, ensuring that the airflow velocity within the drying box 1 always remains within a stable range. This avoids the phenomenon of fluctuating airflow caused by the fixed opening of the directly opened sealing plate 311, thereby more accurately eliminating the temperature and humidity differences between the center and edge of the material.

[0030] The dynamically controlled airflow distribution method brings multiple advantages to the drying process of Dendrobium officinale. From the perspective of drying effect, the central area will not be stagnant due to insufficient airflow, thus avoiding the risk of material mildew; the edge area will not be over-dried due to high-speed airflow, ensuring the uniform evaporation of moisture in the medicinal materials. From the perspective of component retention, the uniform drying process in a low-temperature environment can minimize the loss of effective ingredients, which is crucial for Dendrobium officinale, which focuses on medicinal value. In terms of efficiency and energy consumption, the combination of active suction and uniform diversion shortens the drying cycle and improves the efficiency of water discharge. At the same time, it avoids the energy waste caused by uneven airflow in traditional equipment, providing technical support for reducing energy consumption in the drying process. Overall, the device achieves precise control of the drying process through structural innovation, fundamentally improving the quality and efficiency of Dendrobium officinale drying.

[0031] Working principle: This drying device uses structural innovation to construct an active airflow control system. The core lies in achieving directional suction and uniform dispersion of hot air through the dynamic operation of the control component 3. The drying box 1 serves as the main space. The top hot air pipe 2 is coaxially connected to the air inlet window 302 of the spherical shell 301 of the control component 3 at the bottom of the box to ensure that hot air flows directly into the interior of the spherical shell 301. The bottom of the spherical shell 301 is flexibly rotated by the assembly ring 303 and the ball 304 support structure. In the initial state, the exhaust window 310 is kept closed by the closing plate 311 driven by the coil spring 314, forming a sealed cavity, which not only prevents the leakage of hot air, but also reserves the starting conditions for subsequent airflow control. This design that combines the hot air inlet with the dynamic sealing structure lays the foundation for active airflow circulation, allowing the device to maintain a stable temperature in the box in standby mode and avoid heat loss.

[0032] When the device is activated, motor 308 drives rotating roller 313, driving negative pressure blades 306 within spherical shell 301 to rotate at high speed. Centrifugal force forces air from the air collection chamber outward through exhaust window 310, lowering the internal pressure of spherical shell 301 below the external atmospheric pressure, creating a negative pressure environment. At this point, hot air at air inlet window 302 is automatically drawn into spherical shell 301 due to the pressure differential, replenishing the exhausted air. As negative pressure blades 306 continue to operate, the pressure around the air collection chamber gradually increases. When the pressure differential overcomes the elastic force of coil spring 314 on closing plate 311 of exhaust window 310, closing plate 311 rotates around rotating roller 313, opening exhaust window 310 and allowing the drawn-in, high-humidity hot air to diffuse outward. This active suction mechanism breaks away from the passive model of traditional devices that rely on the natural diffusion of hot air. Instead, it transforms the stagnant airflow in the central region into a directional flow with kinetic energy, providing the core driving force for subsequent uniform dispersion.

[0033] The air guide outer ring 317 and the air guide inner ring 318 on the outer surface of the spherical shell 301 form an annular air guide chamber. When the exhaust window 310 is opened, the negative pressure hot air in the air collection chamber flows into the chamber. With the buffering and balancing effect of the annular guide structure, the high-speed airflow is converted into a uniform airflow with a stable flow rate, which is dispersed to the surrounding areas of the drying box 1. The uniqueness of the air guide structure is that it uses geometric constraints to accurately control the flow rate of the hot air gathered in the center during the diffusion process, avoiding the problems of excessive edge airflow and insufficient center airflow in traditional diffusion methods. At the same time, the closing plate 311 driven by the elastic member forms a dynamic balance with the negative pressure in the spherical shell 301: when the pressure increases, the opening angle of the closing plate 311 increases and the exhaust volume increases; when the pressure decreases, it resets and reduces the exhaust volume. This adaptive adjustment ensures the stability of the airflow rate. Finally, the uniform hot air penetrates the material layer at an appropriate flow rate, eliminating the temperature and humidity differences between the center and the edge of the drying box 1, so that the moisture of the Dendrobium officinale candidum can be evaporated evenly in a low-temperature environment, avoiding both moisture stagnation and mildew in the center and excessive drying of the edges, thereby fundamentally improving the controllability of the drying process and the quality of the medicinal materials.

[0034] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A temperature-controlling and dehumidifying device for drying Dendrobium officinale, characterized in that: It includes a drying box, a hot air pipe is fixedly connected to the top of the drying box, a control component is provided at the bottom of the inner cavity of the drying box, the control component includes a spherical shell, an air inlet window is provided on the top of the spherical shell, the air inlet window coincides with the axis of the hot air pipe, a plurality of negative pressure fan blades are provided inside the spherical shell, a wind gathering chamber is formed inside the spherical shell, a plurality of exhaust windows are provided around the spherical shell, a closing plate fixed with an elastic part is built into the exhaust window, an outer surface of the spherical shell is fixedly connected to an outer air guide ring and an inner air guide ring, the exhaust window is provided between the outer air guide ring and the inner air guide ring, and an air guide chamber is formed between the outer air guide ring and the inner air guide ring.

2. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 1, characterized in that: One side of the drying box opening is hingedly connected with a box door.

3. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 1, characterized in that: The bottom of the spherical shell is fixedly connected with an assembly ring, and the bottom of the assembly ring is installed with a plurality of distributed balls.

4. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 3, characterized in that: A support ring is provided at the bottom of the assembly ring, the top of the support ring contacts the ball, and the bottom of the support ring is fixedly connected to the bottom of the inner cavity of the drying box.

5. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 1, characterized in that: One end of the plurality of negative pressure fan blades close to the center of the spherical shell is fixedly connected to a fixed roller, and a motor is provided at the bottom of the fixed roller.

6. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 5, characterized in that: The surface of the motor is sleeved with a fixing seat, the bottom of the fixing seat is fixedly connected to the bottom of the drying box cavity, the output end of the motor is fixedly connected to a driving roller, and the top of the driving roller is fixedly connected to the fixing roller.

7. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 1, characterized in that: The plurality of exhaust windows are evenly distributed around the axis of the spherical shell. The cross-sections of the outer air guide ring and the inner air guide ring are both arc-shaped structures. The distance between the two gradually expands from the exhaust window outward to form an expanded air guide chamber.

8. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 1, characterized in that: Fixed cylinders are provided on both sides of the exhaust window, one end of the fixed cylinder is fixedly connected to the outer surface of the spherical shell, and the two fixed cylinders are symmetrically distributed along the axis of the exhaust window.

9. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 8, characterized in that: The fixed cylinder is internally provided with a rotating roller, and both ends of the rotating roller are rotatably connected to the bottom of the inner cavity of the fixed cylinder on both sides.

10. The temperature-controlling and dehumidifying device for drying Dendrobium officinale according to claim 1, characterized in that: A connecting seat is fixedly connected to one side of the closing plate close to the rotating roller. An assembly hole running through the connecting seat is provided on the surface of the connecting seat. The connecting seat is fixed to the surface of the rotating roller through the assembly hole.

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