Traditional Chinese medicinal material drying device capable of avoiding excessive drying
The multi-chamber drying device and humidity sensor-controlled step-by-step drying technology solves the problem of over-drying of Chinese medicinal materials, and achieves uniform temperature control and prevents damage.
Patent Information
- Application Number
- CN202520204231.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-10
AI Technical Summary
Traditional Chinese medicine drying equipment is prone to overheating during the drying process, which can cause the Chinese medicine to be over-dried and damaged.
Design a multi-chamber drying device that uses a humidity sensor to control the transfer of Chinese medicinal materials between different drying chambers, and achieves gradual drying from high to low temperature by progressively reducing the hot air temperature and coordinating with the mixing mechanism, thus preventing over-drying.
This effectively prevents Chinese medicinal herbs from being damaged by over-drying, ensures uniformity and quality of drying, and avoids excessively high temperatures.
Smart Images
Figure CN223869728U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of traditional Chinese medicine processing technology, specifically a traditional Chinese medicine drying device that can avoid over-drying. Background Technology
[0002] Traditional Chinese medicine (TCM) herbs refer to substances used for the prevention, treatment, and diagnosis of diseases, and which also have rehabilitative and health-preserving effects, under the guidance of TCM theory. TCM herbs mainly originate from natural medicines and their processed products, including plant-based medicines, animal-based medicines, mineral-based medicines, and some chemical and biological products.
[0003] In the processing of Chinese medicinal herbs, drying is necessary. Traditional drying equipment involves placing the herbs in a drying chamber and drying them with hot air. However, since the temperature of the hot air inside the drying chamber is not easily adjustable, the hot air continues to dry the herbs after some of them have been dried, which can easily lead to overheating and damage. Therefore, it is essential to design a drying device that can prevent over-drying of Chinese medicinal herbs. Utility Model Content
[0004] The purpose of this invention is to provide a drying device for Chinese medicinal materials that can avoid over-drying, thereby solving the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a Chinese herbal medicine drying device that can avoid over-drying, including a drying box, a feeding pipe at the top of the drying box and a discharging pipe at the bottom of the drying box. The drying box is provided with a first drying chamber, a second drying chamber and a third drying chamber from top to bottom. A first hot air mechanism communicating with the first drying chamber is provided on the outside of the first drying chamber. A second hot air mechanism communicating with the second drying chamber is provided on the outside of the second drying chamber. A third hot air mechanism communicating with the third drying chamber is provided on the outside of the third drying chamber. Humidity sensors are provided in the first drying chamber, the second drying chamber and the third drying chamber.
[0006] The top of the drying chamber is equipped with a mixing motor, the output end of which is connected to a rotating shaft. The rotating shaft vertically passes through the first drying chamber, the second drying chamber, and the third drying chamber. Each of the first drying chamber, the second drying chamber, and the third drying chamber is equipped with a mixing mechanism that cooperates with the rotating shaft.
[0007] Each of the first, second, and third drying chambers has a discharge hole at its bottom. A pusher plate is fixed to the rotating shaft to push the medicinal herbs inside the first, second, and third drying chambers towards the discharge hole. Each of the first, second, and third drying chambers has a sealing mechanism on its outer side to seal the discharge hole. The medicinal herbs to be dried are fed into the first drying chamber through the feed pipe. A first hot air mechanism dries the medicinal herbs in the first drying chamber. A mixing motor drives the rotating shaft to rotate, which in turn drives the mixing mechanism to mix the medicinal herbs in the first drying chamber during the drying process, ensuring uniform drying. When the humidity sensor in the first drying chamber detects that the humidity has reached a first threshold, the sealing mechanism on the outer side of the first drying chamber no longer seals the discharge hole. The rotating shaft rotates, driving the pusher plate to rotate, pushing the medicinal herbs in the first drying chamber towards the discharge hole and into the second drying chamber. At this time, the first hot air mechanism stops working, and the second hot air mechanism dries the medicinal herbs in the second drying chamber. The mixing motor drives the rotating shaft to rotate. This process drives the mixing mechanism to mix the Chinese medicinal materials in the second drying chamber, ensuring uniform drying. When the humidity sensor in the second drying chamber detects that the humidity has reached the second threshold, the sealing mechanism on the outside of the second drying chamber stops sealing the discharge hole. The rotating shaft rotates, driving the pusher plate to push the Chinese medicinal materials in the second drying chamber towards the discharge hole and into the third drying chamber. At this time, the second hot air mechanism stops working, and the third hot air mechanism performs hot air drying on the Chinese medicinal materials in the third drying chamber. The mixing motor drives the rotating shaft to rotate, which in turn drives the mixing mechanism to mix the Chinese medicinal materials in the third drying chamber, ensuring uniform drying. When the humidity sensor in the third drying chamber detects that the humidity has reached the third threshold, the sealing mechanism on the outside of the third drying chamber stops sealing the discharge hole. The rotating shaft rotates, driving the pusher plate to push the Chinese medicinal materials in the third drying chamber towards the discharge hole and out through the discharge pipe. By performing a step-by-step drying operation from high to low temperature on the Chinese medicinal materials, excessively high temperatures are prevented, thus preventing damage to the Chinese medicinal materials due to over-drying.
[0008] In a further embodiment, the first hot air mechanism includes a first annular air duct disposed circumferentially outside the first drying chamber, and a plurality of first electric heating tubes are disposed inside the first annular air duct.
[0009] The second hot air mechanism includes a second annular air duct located circumferentially outside the second drying room, and a plurality of second electric heating tubes are provided inside the second annular air duct;
[0010] The third hot air mechanism includes a third annular air duct arranged circumferentially outside the third drying chamber. Several third electric heating tubes are provided inside the third annular air duct. Fans are provided on the outer surfaces of the first, second, and third annular air ducts. Several air guides extending into the first, second, and third drying chambers are provided on the inner surfaces of the first, second, and third annular air ducts, respectively. The fans blow air, which is heated by the operation of the first, second, and third electric heating tubes. The hot air generated is blown into the first, second, and third drying chambers through the air guides.
[0011] In a further embodiment, the mixing mechanism includes a mixing plate mounted on the rotating shaft. The mixing plate has several blades at its top and bottom. A material-pushing column is provided at the bottom of the blades located at the bottom of the mixing plate. The rotating shaft drives the mixing plate to rotate, which in turn drives the blades to rotate, so that the Chinese medicinal materials in the first drying chamber, the second drying chamber and the third drying chamber are heated evenly. The material-pushing column improves the turning effect of the Chinese medicinal materials.
[0012] In a further embodiment, the sealing mechanism includes a movable frame respectively disposed outside the first drying chamber, the second drying chamber, and the third drying chamber. The movable frame is equipped with a drive motor, the output end of which is connected to a screw. A slider is threaded onto the screw, and a push rod is fixed on the slider. The push rod is connected to a sealing plate, and the sealing plate cooperates with a material discharge hole. The drive motor drives the screw to rotate, thereby causing the slider to slide on the screw. In turn, the push rod pushes the sealing plate to move, thereby sealing and opening the material discharge hole.
[0013] In a further embodiment, the number of first heating tubes in the first annular air duct, the number of second heating tubes in the second annular air duct, and the number of third heating tubes in the third annular air duct decreases sequentially, and the power of the first, second, and third heating tubes decreases sequentially. By using the first, second, and third heating tubes with decreasing numbers and power, the temperature inside the first, second, and third drying chambers decreases step by step, preventing the Chinese medicinal materials from being damaged due to over-drying.
[0014] In a further embodiment, the bottom of the drying box is provided with two support seats, and a connecting frame is provided between the two support seats. A collection box is provided on the connecting frame. The collection box is located below the discharge pipe, and the discharge pipe is located below the material drop hole at the bottom of the third drying chamber. The Chinese medicinal materials falling from the discharge pipe are collected by the collection box.
[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The first hot air mechanism performs hot air drying on the Chinese medicinal materials in the first drying chamber. A mixing motor drives the rotating shaft to rotate, thereby driving the mixing mechanism to mix the Chinese medicinal materials during the drying process in the first drying chamber, ensuring uniform drying. When the humidity sensor in the first drying chamber detects that the humidity in the first drying chamber reaches a first threshold, the sealing mechanism on the outside of the first drying chamber no longer seals the discharge hole. The rotating shaft rotates, driving the pusher plate to rotate, pushing the Chinese medicinal materials in the first drying chamber towards the discharge hole and into the second drying chamber. At this time, the first hot air mechanism stops working, and the second hot air mechanism performs hot air drying on the Chinese medicinal materials in the second drying chamber. The mixing motor drives the rotating shaft to rotate, thereby driving the mixing mechanism to mix the Chinese medicinal materials during the drying process in the second drying chamber, ensuring uniform drying. When the humidity sensor in the second drying chamber detects that the humidity in the second drying chamber reaches a first threshold, the sealing mechanism on the outside of the first drying chamber stops sealing the discharge hole. The rotating shaft ... When the humidity inside the drying chamber reaches the second threshold, the sealing mechanism on the outside of the second drying chamber no longer seals the discharge hole. The rotating shaft drives the pusher plate to rotate, pushing the Chinese medicinal materials in the second drying chamber towards the discharge hole and into the third drying chamber. At this time, the second hot air mechanism stops working, and the third hot air mechanism performs hot air drying on the Chinese medicinal materials in the third drying chamber. The mixing motor drives the rotating shaft to rotate, which in turn drives the mixing mechanism to mix the Chinese medicinal materials in the third drying chamber during the drying process, ensuring uniform drying. When the humidity sensor in the third drying chamber detects that the humidity inside the third drying chamber has reached the third threshold, the sealing mechanism on the outside of the third drying chamber no longer seals the discharge hole. The rotating shaft drives the pusher plate to rotate, pushing the Chinese medicinal materials in the third drying chamber towards the discharge hole and out through the discharge pipe. By performing a step-by-step drying operation from high to low temperature on the Chinese medicinal materials, excessively high temperatures are prevented, and the Chinese medicinal materials are prevented from being damaged due to over-drying. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a cross-sectional view of the drying oven of this utility model;
[0018] Figure 3 This is a schematic diagram of the first annular air duct structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the second annular air duct structure of this utility model;
[0020] Figure 5 This is a schematic diagram of the third annular air duct structure of this utility model;
[0021] Figure 6 This is a schematic diagram of the pusher plate installation structure of this utility model;
[0022] The attached figures are labeled as follows: Drying box 1, First drying chamber 2, Second drying chamber 3, Third drying chamber 4, Feed pipe 5, First annular air duct 6, Fan 7, First electric heating tube 8, Air guide head 9, Second annular air duct 10, Second electric heating tube 11, Third annular air duct 12, Third electric heating tube 13, Mixing motor 14, Rotating shaft 15, Mixing plate 16, Blade 17, Feeding column 18, Pushing plate 19, Drop hole 20, Moving frame 21, Drive motor 22, Screw 23, Slider 24, Push rod 25, Sealing plate 26, Discharge pipe 27, Support base 28, Connecting frame 29, Collection box 30, Humidity sensor 31. Detailed Implementation
[0023] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.
[0024] Please see Figure 1-6 This utility model provides a technical solution: a Chinese herbal medicine drying device that can avoid over-drying, including a drying box 1, a feed pipe 5 located at the top of the drying box 1 and a discharge pipe 27 located at the bottom of the drying box 1, wherein both the feed pipe 5 and the discharge pipe 27 are equipped with a material valve. The drying box 1 is provided with a first drying chamber 2, a second drying chamber 3 and a third drying chamber 4 from top to bottom. A first hot air mechanism connected to the first drying chamber 2 is provided on the outside of the first drying chamber 2. A second hot air mechanism connected to the second drying chamber 3 is provided on the outside of the second drying chamber 3. A third hot air mechanism connected to the third drying chamber 4 is provided on the outside of the third drying chamber 4. A humidity sensor 31 is provided in the first drying chamber 2, the second drying chamber 3 and the third drying chamber 4.
[0025] The top of the drying chamber 1 is equipped with a mixing motor 14. The output end of the mixing motor 14 is connected to the rotating shaft 15. The rotating shaft 15 vertically passes through the first drying chamber 2, the second drying chamber 3 and the third drying chamber 4. The first drying chamber 2, the second drying chamber 3 and the third drying chamber 4 are all equipped with a mixing mechanism that drives and cooperates with the rotating shaft 15.
[0026] The bottom of the first drying chamber 2, the second drying chamber 3, and the third drying chamber 4 are all provided with discharge holes 20. A pusher plate 19 is fixed on the rotating shaft 15 to push the Chinese medicinal materials in the first drying chamber 2, the second drying chamber 3, and the third drying chamber 4 towards the discharge holes 20. Sealing mechanisms for sealing the discharge holes 20 are provided on the outside of the first drying chamber 2, the second drying chamber 3, and the third drying chamber 4. The Chinese medicinal materials to be dried are fed into the first drying chamber 2 through the feed pipe 5. The first hot air mechanism performs hot air drying on the Chinese medicinal materials in the first drying chamber 2. The mixing motor 14 drives the rotating shaft 15 to rotate, thereby... The mixing mechanism mixes the Chinese medicinal materials in the first drying chamber 2 during the drying process to ensure uniform drying. When the humidity sensor 31 in the first drying chamber 2 detects that the humidity in the first drying chamber 2 has reached the first threshold, the sealing mechanism on the outside of the first drying chamber 2 no longer seals the discharge hole 20. The rotating shaft 15 rotates, driving the pusher plate 19 to rotate, pushing the Chinese medicinal materials in the first drying chamber 2 towards the discharge hole 20 and falling into the second drying chamber 3. At this time, the first hot air mechanism stops working, and the second hot air mechanism performs hot air drying on the Chinese medicinal materials in the second drying chamber 3. The mixing motor 14 drives the rotating shaft 15 to rotate. The mixing mechanism, driven by the mixing motor 14, mixes the medicinal herbs in the second drying chamber 3 to ensure uniform drying. When the humidity sensor 31 in the second drying chamber 3 detects that the humidity in the second drying chamber 3 has reached the second threshold, the sealing mechanism on the outside of the second drying chamber 3 no longer seals the discharge hole 20. The rotating shaft 15 rotates, driving the pusher plate 19 to rotate, pushing the medicinal herbs in the second drying chamber 3 towards the discharge hole 20 and into the third drying chamber 4. At this time, the second hot air mechanism stops working, and the third hot air mechanism performs hot air drying on the medicinal herbs in the third drying chamber 4. The rotating shaft 15 rotates, thereby driving the mixing mechanism to mix the Chinese medicinal materials in the third drying chamber 4 during the drying process, ensuring uniform drying. When the humidity sensor 31 in the third drying chamber 4 detects that the humidity in the third drying chamber 4 has reached the third threshold, the sealing mechanism on the outside of the third drying chamber 4 no longer seals the discharge hole 20. The rotating shaft 15 rotates, driving the pusher plate 19 to rotate, pushing the Chinese medicinal materials in the third drying chamber 4 towards the discharge hole 20 and discharging them through the discharge pipe 27. By performing a step-by-step drying operation of the Chinese medicinal materials from high to low temperature, the situation of excessive temperature is prevented, and the Chinese medicinal materials are prevented from being damaged due to over-drying.
[0027] In a further embodiment, the first hot air mechanism includes a first annular air duct 6 arranged circumferentially outside the first drying chamber 2, and a plurality of first electric heating tubes 8 are provided in the first annular air duct 6.
[0028] The second hot air mechanism includes a second annular air duct 10 located circumferentially outside the second drying chamber 3, and a plurality of second electric heating tubes 11 are provided inside the second annular air duct 10.
[0029] The third hot air mechanism includes a third annular air duct 12 located circumferentially outside the third drying chamber 4. Several third electric heating tubes 13 are installed inside the third annular air duct 12. Fans 7 are installed on the outer surfaces of the first annular air duct 6, the second annular air duct 10, and the third annular air duct 12. Several air guides 9 are installed on the inner surfaces of the first annular air duct 6, the second annular air duct 10, and the third annular air duct 12, respectively, extending into the first drying chamber 2, the second drying chamber 3, and the third drying chamber 4. The fans 7 blow air, which is then heated by the first electric heating tubes 8, the second electric heating tubes 11, and the third electric heating tubes 13. The resulting hot air is blown into the first drying chamber 2, the second drying chamber 3, and the third drying chamber 4 through the air guides 9.
[0030] In a further embodiment, the mixing mechanism includes a mixing plate 16 mounted on a rotating shaft 15. The mixing plate 16 has several blades 17 at its top and bottom. The blades 17 at the bottom of the mixing plate 16 are provided with a material-pushing column 18. The rotating shaft 15 rotates to drive the mixing plate 16 to rotate, which in turn drives the blades 17 to rotate, so that the Chinese medicinal materials in the first drying chamber 2, the second drying chamber 3 and the third drying chamber 4 are heated evenly. The material-pushing column 18 improves the turning effect of the Chinese medicinal materials.
[0031] In a further embodiment, the sealing mechanism includes a movable frame 21 respectively disposed outside the first drying chamber 2, the second drying chamber 3, and the third drying chamber 4. The movable frame 21 is equipped with a drive motor 22, the output end of which is connected to a screw 23. A slider 24 is threadedly connected to the screw 23, and a push rod 25 is fixed on the slider 24. The push rod 25 is connected to a sealing plate 26, and the sealing plate 26 cooperates with the discharge hole 20. The drive motor 22 drives the screw 23 to rotate, thereby causing the slider 24 to slide on the screw 23. In turn, the push rod 25 pushes the sealing plate 26 to move, thereby sealing and opening the discharge hole 20.
[0032] In a further embodiment, the number of first heating tubes 8 in the first annular air duct 6, the number of second heating tubes 11 in the second annular air duct 10, and the number of third heating tubes 13 in the third annular air duct 12 decreases sequentially, and the power of the first heating tubes 8, the second heating tubes 11, and the third heating tubes 13 decreases sequentially. By decreasing the number and power of the first heating tubes 8, the second heating tubes 11, and the third heating tubes 13, the temperature in the first drying chamber 2, the second drying chamber 3, and the third drying chamber 4 decreases step by step, preventing the Chinese medicinal materials from being damaged due to over-drying.
[0033] In a further embodiment, the bottom of the drying box 1 is provided with two support bases 28, and a connecting frame 29 is provided between the two support bases 28. A collection box 30 is provided on the connecting frame 29. The collection box 30 is located below the discharge pipe 27. The discharge pipe 27 is located below the drop hole 20 at the bottom of the third drying chamber 4. The Chinese medicinal materials falling from the discharge pipe 27 are collected by the collection box 30.
[0034] Working principle: The Chinese medicinal materials to be dried are fed into the first drying chamber 2 through the feed pipe 5. The first hot air mechanism operates, using the fan 7 to blow air and the first electric heating tube 8 to heat it. The resulting hot air is blown into the first drying chamber 2 through the air guide 9 to perform hot air drying on the Chinese medicinal materials in the first drying chamber 2. The mixing motor 14 drives the rotating shaft 15 to rotate, which in turn drives the mixing plate 16 to rotate, which in turn drives the blades 17 to rotate, mixing the Chinese medicinal materials in the first drying chamber 2 during the drying process to ensure uniform drying. When the humidity sensor 31 in the first drying chamber 2 detects that the humidity in the first drying chamber 2 has reached the first threshold, the sealing mechanism on the outside of the first drying chamber 2 no longer seals the discharge hole 20, and the drive motor 22 drives the screw... Rotating rod 23 causes slider 24 to slide on screw 23, which in turn pushes sealing plate 26 to move via push rod 25. Rotating shaft 15 drives pusher plate 19 to rotate, pushing the Chinese medicinal materials in the first drying chamber 2 towards discharge hole 20 and into the second drying chamber 3. At this time, the first hot air mechanism stops working, and then the second hot air mechanism works, blowing air through fan 7 and heating through second electric heating tube 11. The resulting hot air is blown into the second drying chamber 3 through air guide head 9 to perform hot air drying on the Chinese medicinal materials in the second drying chamber 3. The mixing motor 14 drives rotating shaft 15 to rotate, which in turn drives mixing plate 16 to rotate, which in turn drives blades 17 to rotate, mixing the Chinese medicinal materials in the second drying chamber 3 during the drying process to ensure uniform drying. When the humidity sensor 31 in the second drying chamber 3 detects that the humidity in the second drying chamber 3 has reached the second threshold, the sealing mechanism on the outside of the second drying chamber 3 no longer seals the discharge hole 20. The drive motor 22 drives the screw 23 to rotate, which in turn causes the slider 24 to slide on the screw 23. This, in turn, pushes the sealing plate 26 to move through the push rod 25. The rotating shaft 15 rotates, which drives the pusher plate 19 to rotate, pushing the Chinese medicinal materials in the second drying chamber 3 toward the discharge hole 20 and into the third drying chamber 4. At this time, the second hot air mechanism stops working, and the third hot air mechanism starts working. The blower 7 blows air, and the third electric heating tube 13 works to heat the materials. The hot air generated is blown toward the third drying chamber 4 through the air guide 9 to perform hot air drying on the Chinese medicinal materials in the third drying chamber 4. The mixing motor 14 drives the rotating shaft 15 to rotate, which in turn drives the mixing mechanism to mix the Chinese medicinal materials in the third drying chamber 4 during the drying process, ensuring uniform drying. When the humidity sensor 31 in the third drying chamber 4 detects that the humidity in the third drying chamber 4 has reached the third threshold, the sealing mechanism on the outside of the third drying chamber 4 no longer seals the discharge hole 20. The drive motor 22 drives the screw 23 to rotate, which in turn causes the slider 24 to slide on the screw 23. This, in turn, pushes the sealing plate 26 to move through the push rod 25. The rotating shaft 15 rotates, which drives the pusher plate 19 to rotate, pushing the Chinese medicinal materials in the third drying chamber 4 towards the discharge hole 20 and out through the discharge pipe 27. By performing a step-by-step drying operation of the Chinese medicinal materials from high to low temperature, overheating is prevented.To prevent damage to Chinese medicinal herbs due to over-drying.
[0035] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.
Claims
1. A drying device for Chinese medicinal materials that can avoid over-drying, comprising a drying chamber (1), a feed pipe (5) disposed at the top of the drying chamber (1), and a discharge pipe (27) disposed at the bottom of the drying chamber (1), characterized in that: The drying oven (1) is provided with a first drying chamber (2), a second drying chamber (3) and a third drying chamber (4) from top to bottom. The first drying chamber (2) is provided with a first hot air mechanism communicating with the first drying chamber (2) on the outside. The second drying chamber (3) is provided with a second hot air mechanism communicating with the second drying chamber (3) on the outside. The third drying chamber (4) is provided with a third hot air mechanism communicating with the third drying chamber (4) on the outside. Humidity sensors (31) are provided in the first drying chamber (2), the second drying chamber (3) and the third drying chamber (4). The top of the drying box (1) is equipped with a mixing motor (14), the output end of the mixing motor (14) is connected to the rotating shaft (15), the rotating shaft (15) vertically passes through the first drying chamber (2), the second drying chamber (3) and the third drying chamber (4), and the first drying chamber (2), the second drying chamber (3) and the third drying chamber (4) are all equipped with a mixing mechanism that drives and cooperates with the rotating shaft (15); The bottom of the first drying chamber (2), the second drying chamber (3) and the third drying chamber (4) are provided with material discharge holes (20). The rotating shaft (15) is fixed with a pusher plate (19) for pushing the Chinese medicinal materials in the first drying chamber (2), the second drying chamber (3) and the third drying chamber (4) towards the material discharge holes (20). The outer side of the first drying chamber (2), the second drying chamber (3) and the third drying chamber (4) is provided with a sealing mechanism for sealing the material discharge holes (20).
2. The Chinese medicinal herb drying device according to claim 1, characterized in that: The first hot air mechanism includes a first annular air duct (6) located circumferentially outside the first drying chamber (2), and a plurality of first electric heating tubes (8) are provided in the first annular air duct (6); The second hot air mechanism includes a second annular air duct (10) located circumferentially outside the second drying chamber (3), and a plurality of second electric heating tubes (11) are provided in the second annular air duct (10); The third hot air mechanism includes a third annular air duct (12) arranged circumferentially outside the third drying chamber (4). The third annular air duct (12) is provided with a plurality of third electric heating tubes (13). The outer surfaces of the first annular air duct (6), the second annular air duct (10) and the third annular air duct (12) are all provided with fans (7). The inner surfaces of the first annular air duct (6), the second annular air duct (10) and the third annular air duct (12) are all provided with a plurality of air guides (9) that extend into the first drying chamber (2), the second drying chamber (3) and the third drying chamber (4) respectively.
3. The Chinese medicinal herb drying device according to claim 1, characterized in that: The mixing mechanism includes a mixing plate (16) mounted on the rotating shaft (15). The mixing plate (16) has several blades (17) at its top and bottom. The blades (17) at the bottom of the mixing plate (16) have a feeding post (18).
4. The Chinese medicinal herb drying device according to claim 1, characterized in that: The sealing mechanism includes a movable frame (21) respectively located outside the first drying chamber (2), the second drying chamber (3) and the third drying chamber (4). The movable frame (21) is equipped with a drive motor (22). The output end of the drive motor (22) is connected to a screw (23). A slider (24) is threaded onto the screw (23). A push rod (25) is fixed on the slider (24). The push rod (25) is connected to a sealing plate (26). The sealing plate (26) cooperates with the material discharge hole (20).
5. A Chinese medicinal herb drying device according to claim 2, characterized in that: The number of first heating tubes (8) in the first annular air duct (6), the number of second heating tubes (11) in the second annular air duct (10), and the number of third heating tubes (13) in the third annular air duct (12) decrease in sequence, and the power of the first heating tube (8), the second heating tube (11), and the third heating tube (13) decreases in sequence.
6. The Chinese medicinal herb drying device according to claim 1, characterized in that: The drying chamber (1) has two support seats (28) at the bottom, and a connecting frame (29) is provided between the two support seats (28). A collection box (30) is provided on the connecting frame (29). The collection box (30) is located below the discharge pipe (27). The discharge pipe (27) is located below the discharge hole (20) at the bottom of the third drying chamber (4).