Drying equipment

Abstract

The utility model relates to drying equipment which comprises a drying box, a partition plate is arranged in the drying box, a first rectifying pore plate and a second rectifying pore plate are arranged on the partition plate and the drying box, and an inner cavity of the drying box is divided into a circulating air channel and a heating cavity by the first rectifying pore plate, the second rectifying pore plate and the partition plate. A tail gas discharge pipe is arranged on the circulating air duct close to one side of the second rectifying pore plate, a tail gas discharge fan is arranged on the tail gas discharge pipe, a circulating fan is arranged on the circulating air duct above the partition plate, and a heating coil is arranged on the circulating air duct close to the air outlet end of the circulating fan; an air mixing assembly and a nitrogen conveying branch pipe are arranged on the portion, close to the air inlet end of the circulating fan, of the circulating air duct in the direction from the portion close to the circulating fan to the portion away from the circulating fan. The air mixing assembly comprises a connecting ring, a connecting column, mixing blades and an air guide cone. Oxidation of organic components in the traditional Chinese medicinal materials in the drying process is reduced, and the drying time of the traditional Chinese medicinal materials is shortened. The utility model has the advantages of convenient use and wide market prospect.

Description

Technical Field

[0001] The utility model relates to the field of drying equipment, in particular to a drying equipment. Background Art

[0002] Chinese herbal medicine slices are a kind of preparation commonly used by patients and have a wide range of applications. They refer to Chinese herbal medicines that are purified, cut, and processed. Chinese herbal medicine processing refers to the combination of traditional Chinese medicine theory, the needs of clinical practical application, and the different properties of Chinese medicine prescriptions. Chinese herbal medicine processing is a complex biopharmaceutical technology based on traditional Chinese medicine theory. The longer the Chinese herbal medicine is stored, the more likely it is to develop lesions. The processing technology can reduce the risk of lesions; the toxic substances in Chinese herbal medicines can be continuously decomposed through processing, which can effectively weaken the toxicity of the medicinal materials and reduce adverse reactions in the use of Chinese medicine.

[0003] Among them, water treatment is an important method for processing Chinese medicine. Commonly used water treatment methods include drenching, washing, soaking and moistening. They can make the dried medicinal materials absorb an appropriate amount of water and soften them, which is conducive to the cutting of Chinese medicine. Some medicines need to be dried and boiled at high temperature in time after collection to make them completely dry, so as to facilitate low-temperature storage. There are many kinds of drying equipment available, and industrial drying equipment that can circulate hot air flow is a more preferred implementation method because it can save heat energy consumption.

[0004] There is room for improvement in the existing drying equipment that can circulate hot air. The purpose of the drying equipment is to perform the step of high-temperature drying of medicinal materials. The purpose of high-temperature drying is to use the high-temperature environment to dry the moisture contained in the medicinal materials after picking to a preset range. The hot air circulation is usually achieved by continuously sending heated air into the heating chamber. Medicinal materials contain oxidizable organic components, and during the drying process in a high-temperature environment, the organic components in the medicinal materials are exposed to oxygen in the hot air flow in the high-temperature environment, which will cause the organic components to be oxidized, thereby causing the organic components in the medicinal materials to lose all or part of their functions, and then causing the efficacy of the medicinal materials to be reduced. Furthermore, since the hot air flow circulation utilizes the heated exhaust gas to be newly introduced into the heating chamber for continuous circulation, as the drying process of the medicinal materials continues, the moisture content in the hot air flow becomes higher and higher, and the partial pressure of water vapor in the hot air flow circulating above the medicinal materials becomes higher and higher, making the evaporation of the moisture contained in the medicinal materials slower and slower, so there is a problem of excessive energy consumption. The steam content in the hot air flow should be maintained within a reasonable range, so as to keep the moisture in the medicinal materials at a reasonable evaporation rate, thereby shortening the time required for the drying process and reducing the cost required for enterprise operation. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides a drying device which reduces the oxidation of organic components in Chinese medicinal materials when exposed to air during the drying process and shortens the time required for the drying process of the Chinese medicinal materials, so as to overcome the defects in the prior art.

[0006] The technical solution adopted by the utility model is as follows: a drying device, comprising a drying box, wherein a partition is arranged in the drying box, a first rectifying orifice plate is arranged on one end of the partition and the inner wall of the drying box, a second rectifying orifice plate is arranged on the other end of the partition and the inner wall of the drying box, the first rectifying orifice plate, the second rectifying orifice plate and the partition divide the inner cavity of the drying box into a circulating air duct and a heating chamber, an exhaust gas discharge pipe is arranged on the circulating air duct near the side of the second rectifying orifice plate, an exhaust gas discharge fan is arranged on the exhaust gas discharge pipe, a circulating fan is arranged on the circulating air duct above the partition, a heating coil is arranged on the circulating air duct near the air outlet end of the circulating fan, and an air mixing component and a nitrogen delivery branch pipe are arranged on the circulating air duct near the air inlet end of the circulating fan along the direction from close to the circulating fan to away from the circulating fan, and the air mixing component comprises a connecting ring arranged on the circulating air duct, a connecting column arranged on the central axis of the connecting ring, a mixing blade arranged between the connecting column and the connecting ring, and an air guide cone arranged on one end of the connecting column near the nitrogen delivery branch pipe.

[0007] Preferably, a nitrogen delivery main pipe is provided on the inlet end of the nitrogen delivery branch pipe, and a first regulating valve, a first gas flow sensor, a buffer tank, a one-way valve and a nitrogen compressor are sequentially provided on the nitrogen delivery main pipe along the direction from close to the nitrogen delivery branch pipe to far away from the nitrogen delivery branch pipe, and a pressure relief valve and a first pressure sensor are provided on the buffer tank.

[0008] Preferably, a first tapered tube is arranged between the circulating air duct and the exhaust gas emission pipe, and the diameter of the inscribed circle of the inner cavity of the first tapered tube gradually increases as the first tapered tube gradually approaches the circulating air duct, and the exhaust gas emission pipe is provided with a temperature sensor, an online chromatograph, a second regulating valve, a second pressure sensor and a second gas flow sensor in sequence along the direction from close to the second rectifying orifice plate to away from the second rectifying orifice plate, and the exhaust gas emission fan is located between the second regulating valve and the second pressure sensor.

[0009] Preferably, a drying box is provided on the outer side of the heating chamber, and a trolley limiting frame is provided on the heating chamber on the inner side of the box door, the trolley limiting frames are all in N-shape, with the open end of the trolley limiting frame facing the box door, a drying trolley is provided in the trolley limiting frame, the drying trolley comprises a support plate, a universal wheel arranged at the bottom of the support plate and a support frame arranged at the top of the support plate, a plurality of tray fixing devices are arranged on the support frame along the direction from close to the support plate to far away from the support plate, each tray fixing device comprises an N-shaped tray fixing rod arranged on the support frame and two mutually parallel slide rails arranged on the inner side of the tray fixing rod, and a drying tray is movably provided on the two slide rails in each tray fixing device.

[0010] Preferably, the open ends of the several tray fixing rods are all facing the box door, limiting rods are arranged on the support plates and support frames outside the open ends of the several tray fixing rods, the several drying trays are movably connected with the limiting rods, a limiting sleeve is arranged on the limiting rod above the support frame, a first limiting groove is arranged on the limiting sleeve, the first limiting groove includes a longitudinal groove and a transverse groove, the longitudinal groove is parallel to the central axis of the limiting rod, the transverse groove is perpendicular to the longitudinal groove, a handle is arranged on the limiting rod inside the transverse groove, and the transverse groove and the handle are movably connected.

[0011] Preferably, a second limiting groove is provided on the inner side of the box door, a third limiting groove is provided on the cart limiting frame, one end of the support plate is movably connected to the second limiting groove, and the other end of the support plate is movably connected to the third limiting groove.

[0012] Preferably, the drying box is provided with a box door mounting groove, and the box door is installed on the box door mounting groove. The thickness of the drying box below the box door gradually decreases along the direction from close to the cart limiting frame to away from the cart limiting frame. The shape of the bottom of the box door matches the partial shape of the drying box below the box door, and the box door and the drying box below the box door are movably connected.

[0013] The beneficial effects of the utility model are as follows: firstly, the utility model realizes the use of a nitrogen delivery branch pipe to continuously deliver nitrogen into the circulating air duct to complete the nitrogen replacement of the air in the drying box, and utilizes the replaced nitrogen to form a circulating airflow to form a heated airflow, and continuously discharges the heated airflow so that the water vapor content in the heated airflow is always within a reasonable range, so that the moisture in the medicinal materials to be dried on the drying cart can be quickly evaporated, thereby reducing the time required for drying the Chinese medicinal materials, and because the circulating airflow formed by the nitrogen flow isolates oxygen during the heating process of the Chinese medicinal materials, the probability of the organic components contained in the Chinese medicinal materials being oxidized by oxygen during the high temperature process is avoided.

[0014] Secondly, the nitrogen delivery main pipe of the utility model is provided with a first regulating valve, a first gas flow sensor, a buffer tank, a one-way valve and a nitrogen compressor in sequence along the direction from close to the nitrogen delivery branch pipe to far away from the nitrogen delivery branch pipe; the installation of the first gas flow sensor is convenient for feedback of the flow parameters of the gas delivered through the nitrogen delivery branch pipe, and the installation of the buffer tank is convenient for buffering the nitrogen pressurized by the nitrogen compressor so as to form a stable nitrogen flow.

[0015] Again, the exhaust pipe of the utility model is provided with a temperature sensor, an online chromatograph, a second regulating valve, a second pressure sensor and a second gas flow sensor in sequence along the direction from close to the second rectifying orifice plate to far away from the second rectifying orifice plate, and the exhaust fan is located between the second regulating valve and the second pressure sensor; installing the temperature sensor facilitates the feedback of temperature parameters, installing the online chromatograph facilitates the feedback of component parameters, and installing the second gas flow sensor facilitates the feedback of flow parameters.

[0016] The utility model has the advantages of simple structure, convenient operation, ingenious design, greatly improved working efficiency, good social and economic benefits, and is a product that is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 for Figure 1 A partial enlarged schematic diagram of detail A.

[0019] Figure 3 for Figure 1 A partial enlarged schematic diagram of detail B.

[0020] Figure 4 It is a structural schematic diagram of the components of the utility model. DETAILED DESCRIPTION

[0021] like Figures 1 to 4As shown, a drying device comprises a drying box 1, wherein a partition 2 is arranged in the drying box 1, a first rectifying orifice plate 3 is arranged on one end of the partition 2 and the inner wall of the drying box 1, a second rectifying orifice plate 4 is arranged on the other end of the partition 2 and the inner wall of the drying box 1, the first rectifying orifice plate 3, the second rectifying orifice plate 4 and the partition 2 divide the inner cavity of the drying box 1 into a circulating air duct and a heating chamber, an exhaust gas exhaust pipe 5 is arranged on the circulating air duct near the side of the second rectifying orifice plate 4, an exhaust gas exhaust fan 6 is arranged on the exhaust gas exhaust pipe 5, and a circulating air duct above the partition 2 is provided. The circulating air duct near the air outlet of the circulating fan 7 is provided with a heating coil 8, and the heating coil 8 is a steam coil; the circulating air duct near the air inlet of the circulating fan 7 is provided with an air mixing component and a nitrogen delivery branch pipe 9 in the direction from close to the circulating fan 7 to far away from the circulating fan 7, and the air mixing component includes a connecting ring 10 provided on the circulating air duct, a connecting column 11 provided on the central axis of the connecting ring 10, a mixing blade 12 provided between the connecting column 11 and the connecting ring 10, and an air guide cone 13 provided at one end of the connecting column 11 near the nitrogen delivery branch pipe 9. The central axis of the outlet end of the nitrogen delivery branch pipe 9 and the central axis of the air guide cone 13 are located on the same axis. A nitrogen delivery main pipe 14 is provided on the inlet end of the nitrogen delivery branch pipe 9. The nitrogen delivery main pipe 14 is provided with a first regulating valve 15, a first gas flow sensor 16, a buffer tank 17, a one-way valve 18 and a nitrogen compressor 19 in sequence along the direction from close to the nitrogen delivery branch pipe 9 to far away from the nitrogen delivery branch pipe 9. The buffer tank 17 is provided with a pressure relief valve 20 and a first pressure sensor 21.

[0022] A first reducer 22 is provided between the circulating air duct and the exhaust gas discharge pipe 5. The inscribed circle diameter of the inner cavity of the first reducer 22 gradually increases as the first reducer 22 gradually approaches the circulating air duct. The exhaust gas discharge pipe 5 is provided with a temperature sensor 23, an online chromatograph 24, a second regulating valve 25, a second pressure sensor 26 and a second gas flow sensor 27 in sequence from the direction close to the second rectifying orifice plate 4 to the direction away from the second rectifying orifice plate 4. The exhaust gas discharge fan 6 is located between the second regulating valve 25 and the second pressure sensor 26. A release pipe 28 is provided on the circulating air duct between the air outlet end of the circulating fan 7 and the heating coil 8. A second reducer 29 is provided on the circulating air duct between the air inlet end of the circulating fan 7 and the air mixing assembly. The inscribed circle diameter of the inner cavity of the second reducer 29 and the inscribed circle diameter of the inner cavity of the release pipe 28 both gradually decrease in the direction away from the circulating fan 7 to the direction close to the circulating fan 7.

[0023] The drying box 1 outside the heating chamber is provided with a box door 30, and the heating chamber inside the box door 30 is provided with a trolley limiting frame 31, the trolley limiting frame 31 is in an N shape, and the open end of the trolley limiting frame 31 faces the box door 30, and a drying trolley is provided in the trolley limiting frame 31, and the drying trolley includes a support plate 32, a universal wheel 33 provided at the bottom of the support plate 32 and a support frame 34 provided at the top of the support plate 32, and a plurality of tray fixing devices are provided on the support frame 34 along the direction from close to the support plate 32 to away from the support plate 32, each tray fixing device includes an N-shaped tray fixing rod 35 provided on the support frame 34 and two mutually parallel slide rails 36 provided on the inner side of the tray fixing rod 35, each slide rail 36 includes an upper slide rail and a lower slide rail provided below the upper slide rail and parallel to the upper slide rail, and a drying tray 37 is movably provided on the two slide rails 36 in each tray fixing device.

[0024] The open ends of the plurality of tray fixing rods 35 are all facing the box door 30, and limiting rods 38 are arranged on the support plates 32 and the support frames 34 outside the open ends of the plurality of tray fixing rods 35, and the plurality of drying trays 37 are all movably connected with the limiting rods 38, and a limiting sleeve 39 is arranged on the limiting rod 38 above the support frame 34, and a first limiting groove 40 is arranged on the limiting sleeve 39, and the first limiting groove 40 includes a longitudinal groove and a transverse groove, and the longitudinal groove is parallel to the central axis of the limiting rod 38, and the transverse groove is perpendicular to the longitudinal groove, and a handle 41 is arranged on the limiting rod 38 on the inner side of the transverse groove, and the transverse groove and the handle 41 are movably connected.

[0025] The inner side of the box door 30 is provided with a second limiting groove 42, and the cart limiting frame 31 is provided with a third limiting groove 43. One end of the support plate 32 is movably connected to the second limiting groove 42, and the other end of the support plate 32 is movably connected to the third limiting groove 43. Therefore, it is convenient to use the second limiting groove 42 and the third limiting groove 43 to limit the position of the support plate 32, thereby realizing the limitation of the position of the drying cart. The drying box 1 is provided with a box door mounting groove 44, and the box door 30 is installed on the box door mounting groove 44. The thickness of the drying box 1 below the box door 30 gradually decreases along the direction from close to the cart limiting frame 31 to away from the cart limiting frame 31, so that the drying cart can use the shape of the drying box 1 below the box door 30 to enter the heating chamber inside the car limiting frame 31 and reach the preset drying position; the shape of the bottom of the box door 30 matches the shape of part of the drying box 1 below the box door 30, and the box door 30 is movably connected to the drying box 1 below the box door 30.

[0026] The usage of this product is as follows: Figures 1 to 4 As shown, the following steps are included:

[0027] S1. The staff places the medicinal materials to be dried on the drying tray 37, and then places the drying tray 37 with the medicinal materials placed on it into the corresponding tray fixing device. When the preset drying trays 37 with the medicinal materials placed on the drying cart are all installed on the corresponding tray fixing device, the limiting rods 38 are installed on the support plate 32 and the support frame 34 to fix the positions of the several drying trays 37 with the medicinal materials placed on the drying cart; then, the handle 41 is pushed into the bottom of the first limiting groove 40 to complete the position limitation of the limiting rod 38 by combining the handle 41 with the first limiting groove 40; finally, one of the door 30 is opened to push the drying cart with the limiting rod 38 fixed into the cart limiting frame 31 corresponding to the door 30, and then the door 30 is closed. At this time, the support plate 32 of the drying cart is located in the corresponding second limiting groove 42 and the third limiting groove 43, so that the position of the drying cart in the heating chamber is limited by limiting the position of the support plate 32.

[0028] S2, repeatedly executing step S1 until the corresponding drying cart is pushed into the cart limiting frame 31 in each door 30.

[0029] S3, the nitrogen delivery main pipe 14 receives the nitrogen delivered from the upstream, and after being pressurized by the nitrogen compressor 19, it is sent to the buffer tank 17, and then the first regulating valve 15, the circulating fan 7, the exhaust gas exhaust fan 6 and the second regulating valve 25 are opened. At this time, the nitrogen stored in the buffer tank 17 and pressurized by the nitrogen compressor 19 is transported to the mixing assembly through the nitrogen delivery branch pipe 9 and mixed with the air originally in the drying box 1. It is sent to the circulating fan 7 through the second tapered pipe 29 for driving, and then discharged from the release pipe 28 to the circulating air duct in the drying box 1 through the first rectifying orifice plate 3 to enter the heating chamber and then enter the circulating air duct again from the second rectifying orifice plate 4 and then divided into two parts. The first part is transported to the exhaust gas exhaust pipe 5 as exhaust gas, and the second part continues to move along the circulating air duct toward the mixing assembly and is mixed with the nitrogen continuously transported through the nitrogen delivery branch pipe 9 and then sent to the circulating fan 7 to form a circulation.

[0030] S4. When the oxygen content fed back by the online chromatograph 24 reaches below the preset range, high-pressure steam is introduced into the heating coil 8, and heat exchange is performed between the air flow outside the heating coil 8 and the high-pressure steam introduced into the inner cavity of the heating coil 8. The air flow outside the heating coil 8 is heated to form a heated circulating air flow. When the parameter fed back by the temperature sensor 23 installed on the exhaust pipe 5 reaches the preset range, the heating timing starts. In this process, the opening of the second regulating valve 25 and the first regulating valve 15 needs to be adjusted to reduce the amount of nitrogen transported through the nitrogen transport branch pipe 9 and reduce the amount of gas discharged through the exhaust pipe 5.

[0031] S5. Keep the high-pressure steam flowing into the heating coil 8. When the moisture parameter content fed back by the online chromatograph 24 rises to the preset range, the opening of the second regulating valve 25 and the first regulating valve 15 should be adjusted again, so that the moisture parameter content fed back by the online chromatograph 24 is always within the preset range.

[0032] S6. Keep the high-pressure steam flowing into the heating coil 8. When the moisture parameter content fed back by the online chromatograph 24 shows a downward trend and reaches the preset range, stop feeding the high-pressure steam into the heating coil 8 and adjust the opening of the second regulating valve 25 and the first regulating valve 15 again, increase the amount of nitrogen delivered to the circulating air duct of the drying box 1 through the nitrogen delivery branch pipe 9 and increase the amount of exhaust gas discharged to the outside through the exhaust pipe 5. When the temperature sensor 23 installed in the exhaust pipe 5 reaches the preset range, the cooling process of the dried medicinal materials is completed.

[0033] S7, open the door 30 in sequence and push out the corresponding drying cart, then remove the drying tray 37 from the drying cart and place the dried medicinal materials on the drying tray 37 into a preset area and keep them properly for the next process.

[0034] Through this embodiment, it is achieved that nitrogen is continuously transported into the circulating air duct by the nitrogen delivery branch pipe 9 to complete the nitrogen replacement of the air in the drying box 1, and the replaced nitrogen is used to form a circulating airflow to form a heated airflow, and the heated airflow is continuously discharged so that the water vapor content in the heated airflow is always within a reasonable range, so that the moisture in the medicinal materials to be dried on the drying cart can be quickly evaporated, thereby reducing the time required for drying the Chinese medicinal materials. In addition, since the circulating airflow formed by the nitrogen flow isolates oxygen during the heating process of the Chinese medicinal materials, the probability of the organic components contained in the Chinese medicinal materials being oxidized by oxygen during the high temperature process is avoided.

[0035] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A drying device, characterized in that: The drying box (1) comprises a partition (2) disposed inside the drying box (1), a first rectifying orifice plate (3) disposed at one end of the partition (2) and on the inner wall of the drying box (1), a second rectifying orifice plate (4) disposed at the other end of the partition (2) and on the inner wall of the drying box (1), the first rectifying orifice plate (3), the second rectifying orifice plate (4) and the partition (2) dividing the inner cavity of the drying box (1) into a circulating air duct and a heating cavity, an exhaust gas discharge pipe (5) disposed on the circulating air duct near the side of the second rectifying orifice plate (4), an exhaust gas discharge fan (6) disposed on the exhaust gas discharge pipe (5), and a heating chamber (7) disposed on the circulating air duct above the partition (2). A circulating fan (7), a heating coil (8) being arranged on the circulating air duct near the air outlet of the circulating fan (7), and an air mixing component and a nitrogen delivery branch pipe (9) being arranged on the circulating air duct near the air inlet of the circulating fan (7) in a direction from near the circulating fan (7) to far away from the circulating fan (7), wherein the air mixing component comprises a connecting ring (10) arranged on the circulating air duct, a connecting column (11) arranged on the central axis of the connecting ring (10), a mixing blade (12) arranged between the connecting column (11) and the connecting ring (10), and an air guide cone (13) arranged at one end of the connecting column (11) near the nitrogen delivery branch pipe (9).

2. The drying device according to claim 1, characterized in that: A nitrogen delivery main pipe (14) is arranged at the inlet end of the nitrogen delivery branch pipe (9), and a first regulating valve (15), a first gas flow sensor (16), a buffer tank (17), a one-way valve (18) and a nitrogen compressor (19) are arranged on the nitrogen delivery main pipe (14) in sequence from close to the nitrogen delivery branch pipe (9) to far away from the nitrogen delivery branch pipe (9), and a pressure relief valve (20) and a first pressure sensor (21) are arranged on the buffer tank (17).

3. The drying device according to claim 2, characterized in that: A first tapered pipe (22) is provided between the circulating air duct and the exhaust gas discharge pipe (5); the diameter of an inscribed circle of an inner cavity of the first tapered pipe (22) gradually increases as the first tapered pipe (22) gradually approaches the circulating air duct; a temperature sensor (23), an online chromatograph (24), a second regulating valve (25), a second pressure sensor (26) and a second gas flow sensor (27) are sequentially provided on the exhaust gas discharge pipe (5) in a direction from close to the second rectifying orifice plate (4) to far away from the second rectifying orifice plate (4); and the exhaust gas discharge fan (6) is located between the second regulating valve (25) and the second pressure sensor (26).

4. The drying device according to claim 1, characterized in that: A drying box (1) is provided on the outside of the heating chamber, and a trolley limiting frame (31) is provided on the heating chamber inside the box door (30). The trolley limiting frame (31) is in an N shape, and the open end of the trolley limiting frame (31) faces the box door (30). A drying trolley is provided inside the trolley limiting frame (31). The drying trolley comprises a support plate (32), a universal wheel (33) provided at the bottom of the support plate (32), and a support frame (34) provided at the top of the support plate (32). A plurality of tray fixing devices are provided on the support frame (34) from close to the support plate (32) to far from the support plate (32). Each tray fixing device comprises an N-shaped tray fixing rod (35) provided on the support frame (34) and two mutually parallel slide rails (36) provided on the inner side of the tray fixing rod (35). A drying tray (37) is movably provided on the two slide rails (36) in each tray fixing device.

5. The drying device according to claim 4, characterized in that: The open ends of the plurality of tray fixing rods (35) are all facing the box door (30); a limiting rod (38) is arranged on the support plate (32) and the support frame (34) outside the open ends of the plurality of tray fixing rods (35); the plurality of drying trays (37) are all movably connected to the limiting rod (38); a limiting sleeve (39) is arranged on the limiting rod (38) above the support frame (34); a first limiting groove (40) is arranged on the limiting sleeve (39); the first limiting groove (40) comprises a longitudinal groove and a transverse groove; the longitudinal groove is parallel to the central axis of the limiting rod (38); the transverse groove is perpendicular to the longitudinal groove; a handle (41) is arranged on the limiting rod (38) inside the transverse groove; the transverse groove and the handle (41) are movably connected.

6. The drying device according to claim 4, characterized in that: A second limiting groove (42) is arranged on the inner side of the box door (30), a third limiting groove (43) is arranged on the cart limiting frame (31), one end of the support plate (32) is movably connected to the second limiting groove (42), and the other end of the support plate (32) is movably connected to the third limiting groove (43).

7. The drying device according to claim 4, characterized in that: The drying box (1) is provided with a box door mounting groove (44), the box door (30) is mounted on the box door mounting groove (44), the thickness of the drying box (1) below the box door (30) gradually decreases along the direction from close to the cart limiting frame (31) to away from the cart limiting frame (31), the shape of the bottom of the box door (30) matches the shape of the part of the drying box (1) below the box door (30), and the box door (30) and the drying box (1) below the box door (30) are movably connected.

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