Tobacco leaf baking device with uniform baking function

Abstract

The invention belongs to the technical field of tobacco leaf curing, and particularly provides a uniform-curing tobacco leaf curing device which comprises a curing room, a curing tank, a tobacco leaf fixing assembly, a heat pump heating device and a controller. According to the device, a plurality of baking tanks are arranged in the baking room in an array mode, tobacco leaf fixing assemblies are arranged in the baking tanks respectively and used for fixing tobacco leaves needing to be baked, the tobacco leaves surround air spraying openings of heat conveying branch pipes, heat is conveyed to a heat conveying main pipe and the heat conveying branch pipes through a heat pump heating device, and the heat is sprayed out through the air spraying openings; meanwhile, the control motor can drive the control gear to rotate, the control gear drives the rotating gear ring to rotate, and the rotating gear is driven by the fixed gear ring to rotate, so that the technical effect that the tobacco leaves rotate while rotating around the heat transfer branch pipe is achieved, and the baking uniformity of the tobacco leaves is improved.

Description

Technical Field

[0001] This invention belongs to the field of tobacco curing technology, specifically referring to a tobacco curing device that provides uniform curing. Background Technology

[0002] Curing tobacco leaves is an important step in tobacco processing. Through curing, the moisture in the tobacco leaves evaporates, starch and protein are hydrolyzed, soluble sugars and organic acids increase, ammonia and off-flavors dissipate, and nicotine content decreases, thereby improving the quality and taste of the tobacco leaves.

[0003] A Chinese patent with publication number CN115517390A discloses a high-efficiency tobacco curing device. The device uses a motor to drive a rotating rod, which in turn moves two adjacent partitions. The partitions push the tobacco leaves to tumble, allowing them to fall from a height in a cyclical manner. This reduces the overlap and accumulation of tobacco leaves, allowing the hot air from the hot air supply component to cover a larger area of ​​the tobacco leaf surface, improving the uniformity of the curing process and thus enhancing the quality of the tobacco leaves.

[0004] However, in the actual tobacco curing process, the tobacco leaves become brittle due to the loss of moisture. The curing device described above, which uses partitions to tumble the tobacco leaves, can easily cause the dehydrated tobacco leaves to break, damaging their integrity. After curing, it is difficult to obtain relatively intact tobacco leaves, which affects subsequent tobacco processing steps.

[0005] Therefore, the present invention provides a tobacco leaf baking apparatus that provides uniform baking, thereby solving the problems existing in the prior art. Summary of the Invention

[0006] This invention overcomes the shortcomings of existing technologies and provides a tobacco leaf baking device for uniform baking. The device features multiple baking tanks arranged in an array within a baking chamber. Each baking tank contains a tobacco leaf fixing component, which secures the tobacco leaves to be baked. The tobacco leaves are arranged around the nozzles of the heat transfer branch pipes. A heat pump heating device delivers heat to the main heat transfer pipe and the branch pipes, and then sprays it out through the nozzles to bake the surrounding tobacco leaves, improving the uniformity of baking. During the tobacco leaf baking process, a control motor drives a control gear to rotate, which in turn drives a rotating gear ring. Simultaneously, the rotating gear ring drives the rotating gear to rotate around the heat transfer branch pipes, and the rotating gear also rotates on its own axis under the influence of the fixed gear ring. This achieves the technical effect of the tobacco leaves rotating around the heat transfer branch pipes while simultaneously rotating on their own axis, further improving the uniformity of tobacco leaf baking.

[0007] The technical solution adopted by this invention is as follows: This solution provides a tobacco leaf curing device for uniform curing, including a curing chamber. A curing tank is fixedly arranged in a linear array on the upper wall inside the curing chamber. Tobacco leaf fixing components are arranged in a linear array on the upper wall inside the curing chamber. The tobacco leaf fixing components are respectively located inside the upper part of the curing tank. A heat pump heating device is provided on one side of the curing chamber. The tobacco leaf fixing components include fixing rods, support rods, rotating gear rings, rotating gears, and tobacco leaf holders. The fixing rods are fixedly arranged in a linear array on the upper wall inside the curing chamber. The fixing rods are arranged in pairs inside the curing tank. A fixing gear ring is fixedly provided at the lower end of each fixing rod. The support rods are respectively located on the side of the fixing rod away from the center of the fixing gear ring. A movable gear ring is rotatably engaged at the lower end of a support rod. The rotating gear ring is coaxially rotatably disposed outside a fixed gear ring. A sliding groove is formed on the upper end face of the rotating gear ring along its circumference. Each of the lower ends of the support rod has a locking block, which engages within the sliding groove. A support plate is fixedly arranged in a ring array on the lower end face of the rotating gear ring. Rotating gears are rotatably disposed at the end of the support plate near the center of the rotating gear ring, and are rotatably disposed between the fixed gear ring and the rotating gear ring. A tobacco leaf holder is rotatably arranged in a ring array on the lower wall of the support plate. A connecting rod is fixedly disposed on the lower end face of the rotating gear, and the connecting rod passes through the upper wall of the support plate. The upper end of the tobacco leaf holder is fixed to the lower end of the connecting rod.

[0008] Furthermore, the upper and lower end faces of the rotating gear are flush with the upper and lower end faces of the rotating gear ring, the outer side wall of the fixed gear ring is provided with a ring array of fixed teeth, the rotating gear is respectively meshed with the fixed teeth, a support block is fixedly provided on the side wall of one of the support rods, a control gear is rotatably provided at the lower end of the support block, the outer side wall of the rotating gear ring is provided with a ring array of rotating teeth, and the control gear is meshed with the rotating teeth.

[0009] Furthermore, the output end of the heat pump heating device is connected to a heat transfer main pipe, which passes through the side wall of the baking chamber and is located inside the baking chamber. A straight array of heat transfer branch pipes is provided through the side wall of the heat transfer main pipe. The heat transfer branch pipes pass through the lower end of the baking tank and are located at the center of the baking tank. The fixing rod is located on both sides of the heat transfer branch pipe. The fixing toothed ring and the rotating toothed ring are coaxially sleeved on the outside of the heat transfer branch pipe.

[0010] Furthermore, the tobacco leaf fixer includes a receiving cylinder, a connecting ring, a ring cover, a rotating ring, a clamping cam, and a clamping gear. The receiving cylinder is fixedly disposed at the lower end of the connecting rod. The connecting ring is coaxially fixedly disposed at the lower edge of the receiving cylinder. Connecting blocks are symmetrically fixedly disposed on the side wall of the connecting ring. The ring cover is fixedly disposed at the lower end of the connecting blocks and is coaxially disposed below the connecting ring. The rotating ring is rotatably disposed on the lower wall of the ring cover. A cam connecting shaft is symmetrically fixedly disposed on the lower end of the connecting ring. The clamping cam is rotatably disposed at the lower end of the cam connecting shaft and is disposed between the connecting ring and the ring cover. The clamping gear is fixedly disposed on the lower wall of the clamping cam and is disposed inside the rotating ring. The clamping gear is coaxially disposed with the cam connecting shaft.

[0011] Furthermore, the inner wall of the rotating ring is provided with an annular array of rotating internal teeth, and the clamping gear is meshed with the rotating internal teeth.

[0012] Furthermore, the upper end of the side wall of the rotating ring is provided with a rotating thread, which is threadedly connected to the inner wall of the ring cover.

[0013] Furthermore, the sidewall of the heat transfer branch pipe is uniformly provided with air jets.

[0014] Furthermore, the baking tank has an operating opening on its side wall, an opening door is provided on one side edge of the operating opening, an observation window is provided on the side wall of the opening door, a control panel is fixedly provided on the outer side wall of the opening door, the control panel is located below the observation window, and a thermometer and hygrometer are provided on the inner wall of the baking tank.

[0015] Furthermore, the upper outer wall of the baking chamber is provided with a linear array of control motors, which are respectively positioned above and below the support blocks. The output ends of the control motors pass through the upper wall of the baking chamber and the support blocks, and are connected to the rotation shaft of the control gear.

[0016] Furthermore, a controller is provided on one side of the baking chamber, and the control motor, control panel, thermometer and hygrometer and heat pump heating device are electrically connected to the controller through wires.

[0017] Furthermore, the controller is a Siemens S7-1200.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: (1) This device sets up multiple baking tanks in the baking room. Each baking tank is equipped with a tobacco leaf fixing component. The tobacco leaf fixing component is used to fix the tobacco leaves that need to be baked. The tobacco leaves are surrounded around the air nozzle of the heat transfer branch pipe. The heat pump heating device delivers heat to the heat transfer main pipe and heat transfer branch pipe and sprays it out through the air nozzle to bake the surrounding tobacco leaves, thereby improving the baking uniformity of the tobacco leaves. (2) During the tobacco curing process, the control motor can drive the control gear to rotate, the control gear drives the rotating gear ring to rotate, and the rotating gear ring drives the rotating gear to rotate around the heat transfer branch pipe. At the same time, the rotating gear will also rotate under the drive of the fixed gear ring, thereby achieving the technical effect of the tobacco leaves rotating around the heat transfer branch pipe while rotating on their own, further improving the curing uniformity of the tobacco leaves. (3) When the user fixes the tobacco leaves with the tobacco leaf fixer, the leaf stalk of the tobacco leaf is inserted into the rotating ring and the receiving cylinder. The rotating ring is turned. At this time, the clamping gear will rotate under the drive of the rotating internal gear, thereby causing the clamping cam to rotate. The protruding part of the clamping cam rotates to the side closer to the center of the rotating ring, thereby effectively clamping the leaf stalk of the tobacco leaf and fixing the tobacco leaf. Compared with the traditional rope binding method or the method of using clips to clamp the leaf stalk, this device has a better fixing effect on the tobacco leaf. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a tobacco leaf baking device for uniform baking proposed in this invention; Figure 2 This is a schematic diagram of a tobacco leaf baking device for uniform baking proposed in this invention, without the baking tank. Figure 3 A schematic diagram of the structure of the baking tank, tobacco leaf fixing assembly, and heat transfer branch pipe; Figure 4 A schematic diagram of the first structure of the tobacco leaf fixing assembly; Figure 5 A schematic diagram of the exploded structure of a tobacco leaf fixing assembly; Figure 6 A schematic diagram of the second structure of the tobacco leaf fixing assembly; Figure 7 for Figure 6 An enlarged schematic diagram of part A in the middle; Figure 8 This is a schematic diagram of the structure of a tobacco leaf fixer; Figure 9 A schematic diagram of the exploded structure of a tobacco leaf fixer; Figure 10 This is a schematic diagram of the structure when tobacco leaves are fixed by a tobacco leaf fixer.

[0020] The components include: 1. Baking chamber; 11. Control motor; 2. Baking tank; 21. Operation port; 22. Opening door; 221. Observation window; 23. Control panel; 24. Thermometer and hygrometer; 3. Tobacco leaf fixing assembly; 31. Fixing rod; 311. Fixing gear ring; 3111. Fixing teeth; 32. Support rod; 321. Locking block; 322. Support block; 3221. Control gear; 33. Rotating gear ring; 331. Rotating teeth; 332. Support plate; 333. 34. Sliding groove, 341. Rotating gear, 35. Connecting rod, 36. Tobacco leaf holder, 351. Receiving cylinder, 352. Connecting ring, 3521. Connecting block, 3522. Cam coupling, 353. Ring cover, 354. Rotating ring, 3541. Rotating internal gear, 3542. Rotating thread, 355. Clamping cam, 356. Clamping gear, 4. Heat pump heating device, 41. Main heat transfer pipe, 42. Branch heat transfer pipe, 421. Air jet, 5. Controller.

[0021] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10This embodiment of a uniformly roasted tobacco leaf roasting device includes a roasting chamber 1, a roasting tank 2, tobacco leaf fixing components 3, a heat pump heating device 4, and a controller 5. The roasting tank 2 is fixedly arranged in a linear array on the upper inner wall of the roasting chamber 1. The tobacco leaf fixing components 3 are arranged in a linear array on the upper inner wall of the roasting chamber 1. The tobacco leaf fixing components 3 are respectively arranged at the upper inner end of the roasting tank 2. The heat pump heating device 4 is arranged on one side of the roasting chamber 1, and the controller 5 is arranged on one side of the roasting chamber 1.

[0025] The baking tank 2 has an operation port 21 on its side wall. An opening door 22 is provided on one side edge of the operation port 21. An observation window 221 is provided on the side wall of the opening door 22. A control panel 23 is fixed on the outer side wall of the opening door 22. The control panel 23 is located below the observation window 221. A thermometer and hygrometer 24 is provided on the inner wall of the baking tank 2.

[0026] The tobacco leaf fixing assembly 3 includes fixing rods 31, support rods 32, rotating gear rings 33, rotating gears 34, and tobacco leaf fixers 35. The fixing rods 31 are linearly arrayed and fixed to the upper inner wall of the curing chamber 1. The fixing rods 31 are arranged in pairs inside the curing tank 2. The lower end of the fixing rod 31 is fixed with a fixing gear ring 311. The support rods 32 are respectively located on the side of the fixing rod 31 away from the center of the fixing gear ring 311. The rotating gear ring 33 is engaged and rotatably disposed at the lower end of the support rod 32. The rotating gear ring 33 is coaxially rotatably disposed on the outside of the fixing gear ring 311. The upper end surface of the rotating gear ring 33 is provided with a sliding groove 333 along the circumferential direction of the rotating gear ring 33. The lower end of the support rod 32 is provided with a locking block 321, which is respectively locked in the sliding groove 333. The lower end face of the rotating gear ring 33 is fixedly provided with a support plate 332 in an annular array. The rotating gear 34 is rotatably provided at one end of the support plate 332 near the center of the rotating gear ring 33. The rotating gear 34 is rotatably provided between the fixed gear ring 311 and the rotating gear ring 33. The tobacco leaf holder 35 is rotatably provided in an annular array on the lower wall of the support plate 332. The lower end face of the rotating gear 34 is fixedly provided with a connecting rod 341, which is provided through the upper wall of the support plate 332. The upper end of the tobacco leaf holder 35 is fixed to the lower end of the connecting rod 341. The upper and lower end faces of the rotating gear 34 are flush with the upper and lower end faces of the rotating gear ring 33. The outer side wall of the fixed gear ring 311 is provided with a ring array of fixed teeth 3111. The rotating gear 34 is respectively meshed with the fixed teeth 3111. A support block 322 is fixedly provided on the side wall of a support rod 32. A control gear 3221 is rotatably provided at the lower end of the support block 322. The outer side wall of the rotating gear ring 33 is provided with a ring array of rotating teeth 331. The control gear 3221 is meshed with the rotating teeth 331. A control motor 11 is provided in a linear array on the upper outer wall of the baking chamber 1. The control motor 11 is respectively positioned above and below the support block 322. The output end of the control motor 11 passes through the upper wall of the baking chamber 1 and the support block 322. The output end of the control motor 11 is connected to the rotating shaft of the control gear 3221.

[0027] The tobacco leaf holder 35 includes a receiving cylinder 351, a connecting ring 352, a ring cover 353, a rotating ring 354, a clamping cam 355, and a clamping gear 356. The receiving cylinder 351 is fixedly disposed at the lower end of the connecting rod 341. The connecting ring 352 is coaxially fixedly disposed at the lower edge of the receiving cylinder 351. Connecting blocks 3521 are symmetrically fixedly disposed on the side wall of the connecting ring 352. The ring cover 353 is fixedly disposed at the lower end of the connecting block 3521 and coaxially disposed at the lower edge of the connecting ring 352. In this configuration, a rotating ring 354 is rotatably mounted on the lower wall of a ring cover 353. A cam coupling shaft 3522 is symmetrically fixed on the lower end of a connecting ring 352. A clamping cam 355 is rotatably mounted on the lower end of the cam coupling shaft 3522 and is located between the connecting ring 352 and the ring cover 353. A clamping gear 356 is fixed on the lower wall of the clamping cam 355 and is located on the inner side of the rotating ring 354. The clamping gear 356 is coaxially mounted with the cam coupling shaft 3522. The inner wall of the rotating ring 354 is provided with a ring array of rotating internal teeth 3541, and the clamping gear 356 is meshed with the rotating internal teeth 3541. The upper end of the side wall of the rotating ring 354 is provided with a rotating thread 3542, which is threaded to the inner wall of the ring cover 353.

[0028] The output end of the heat pump heating device 4 is connected to a heat transfer main pipe 41. The heat transfer main pipe 41 passes through the side wall of the baking chamber 1 and is located inside the baking chamber 1. A heat transfer branch pipe 42 is arranged in a straight line array through the side wall of the heat transfer main pipe 41. The heat transfer branch pipe 42 passes through the lower end of the baking tank 2 and is located inside the center of the baking tank 2. The fixing rod 31 is located on both sides of the heat transfer branch pipe 42. The fixing toothed ring 311 and the rotating toothed ring 33 are coaxially sleeved on the outside of the heat transfer branch pipe 42. The side wall of the heat transfer branch pipe 42 is evenly provided with air jets 421.

[0029] The control motor 11, control panel 23, thermometer and hygrometer 24 and heat pump heating device 4 are electrically connected to the controller 5 via wires.

[0030] Working Principle and Workflow: Traditional methods of securing tobacco leaves mainly involve binding, where workers use hemp rope to tie multiple tobacco leaves one by one to a long pole, which is then set up in the curing barn. This method requires a large amount of labor, and the hemp rope binding is not very secure, requiring certain binding skills and is inconvenient to use. Alternatively, clamps can be used to hold the tobacco leaves by their stems. However, after prolonged use, the clamping force of the clamps tends to decrease, making it difficult to secure the tobacco leaves. Therefore, this device is equipped with a tobacco leaf holder 35 to facilitate the securing of tobacco leaves by workers. Workers first take out the tobacco leaves to be cured, open the opening door 22, and then fix the tobacco leaves one by one to the tobacco leaf holder. In component 3, on the tobacco leaf holder 35, the user first inserts the leaf stalk of the tobacco leaf into the rotating ring 354 and the receiving cylinder 351, and then turns the rotating ring 354. At this time, the clamping gear 356 will rotate under the drive of the rotating internal gear 3541, thereby causing the clamping cam 355 to rotate. The protruding part of the clamping cam 355 rotates to the side closer to the center position of the rotating ring 354. At this time, the rotating ring 354 is tightened with the ring cover 353 through the rotating thread 3542, ensuring the stability of the position between the rotating ring 354 and the ring cover 353, thereby effectively clamping the leaf stalk of the tobacco leaf and fixing the tobacco leaf. Compared with the traditional rope binding method and the clamp fixing method, this device has a better fixing effect on the tobacco leaf.

[0031] After securing the tobacco leaves, the staff closes the door 22 and starts the tobacco drying program via the controller 5. First, the controller 5 automatically starts the heat pump heating device 4. The heat pump heating device 4 uses an air-source heat pump dryer for tobacco drying. The air-source heat pump dryer is existing technology and will not be described in detail here. At this time, the tobacco leaves are surrounded by the air jet 421 of the heat transfer branch pipe 42. The heat pump heating device 4 transfers heat to the heat transfer main pipe 41 and the heat transfer branch pipe 42, and sprays it out through the air jet 421 to dry the surrounding tobacco leaves, thereby improving the uniformity of tobacco drying.

[0032] During the tobacco curing process, the controller 5 automatically starts the control motor 11, which drives the control gear 3221 to rotate. The control gear 3221 drives the rotating gear ring 33 to rotate. The rotating gear ring 33 drives the rotating gear 34 to rotate around the heat transfer branch pipe 42. At the same time, the rotating gear 34 also rotates on its own axis under the drive of the fixed gear ring 311. This achieves the technical effect of the tobacco leaves rotating around the heat transfer branch pipe 42 while rotating on their own axis, further improving the curing uniformity of the tobacco leaves.

[0033] The temperature and humidity meter 24 can measure the temperature and humidity values ​​in each baking tank 2 in real time and reflect the data on the control panel 23. The staff can obtain the environmental information during the tobacco baking process through the control panel 23 and preset the temperature and humidity in the baking tank 2 through the controller 5 so that the baking tank 2 has suitable baking conditions.

[0034] After the tobacco leaves are cured, the staff will reopen the door and loosen the rotating ring 354 to make the protruding end of the clamping cam 355 rotate away from the tobacco leaf stalk, so that the tobacco leaf stalk loses its clamping function. The staff can then remove the tobacco leaves from the tobacco leaf holder 35.

[0035] The above is the overall workflow of this invention. Simply repeat this process the next time you use it.

[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A tobacco leaf baking device for uniform baking, comprising a baking room (1), characterized in that: The baking chamber (1) has a baking jar (2) fixedly arranged in a linear array on the inner upper wall thereof. The baking chamber (1) has a tobacco leaf fixing assembly (3) arranged in a linear array on the inner upper wall thereof. The tobacco leaf fixing assembly (3) is arranged at the inner upper end of each baking jar (2). A heat pump heating device (4) is arranged on one side of the baking chamber (1). The tobacco leaf fixing assembly (3) comprises a fixing rod (31), a supporting rod (32), a rotating gear ring (33), a rotating gear (34) and a tobacco leaf fixing device (35). The fixing rods (31) are fixedly arranged in a linear array on the inner upper wall of the baking chamber (1). The fixing rods (31) are arranged in pairs in the baking jar (2). A fixing gear ring (311) is fixedly arranged at the lower end of the fixing rod (31). The supporting rods (32) are arranged at one side of the fixing rod (31) away from the center of the fixing gear ring (311). The rotating gear ring (33) is arranged to engage and rotate at the lower end of the supporting rod (32). The rotating gear ring (33) rotates coaxially with the fixing rod (31). The rotating gear ring (33) is provided on the outer side of the fixed gear ring (311), and a sliding groove (333) is provided on the upper end surface of the rotating gear ring (33) along the circumferential direction of the rotating gear ring (33). The lower ends of the support rods (32) are respectively provided with clamping blocks (321), and the clamping blocks (321) are respectively engaged in the sliding grooves (333). The lower end surface of the rotating gear ring (33) is fixed with support plates (332) in an annular array, and the rotating gears (34) are respectively rotatably arranged on the support plates (332) close to the rotating gear ring (33). At one end of the center of the movable gear ring (33), the rotating gear (34) is rotatably arranged between the fixed gear ring (311) and the rotating gear ring (33), the tobacco leaf holders (35) are rotatably arranged in an annular array on the lower wall of the support plate (332), a connecting rod (341) is fixedly arranged on the lower end surface of the rotating gear (34), the connecting rod (341) penetrates the upper wall of the support plate (332), and the upper end of the tobacco leaf holder (35) is fixed to the lower end of the connecting rod (341).

2. A tobacco leaf baking device for uniform baking according to claim 1, characterized in that: The upper and lower end surfaces of the rotating gear (34) are flush with the upper and lower end surfaces of the rotating gear ring (33); the outer wall of the fixed gear ring (311) is provided with fixed teeth (3111) in an annular array; the rotating gear (34) is respectively meshed with the fixed teeth (3111); a supporting block (322) is fixedly provided on the side wall of one of the supporting rods (32); a control gear (3221) is rotatably provided at the lower end of the supporting block (322); the outer wall of the rotating gear ring (33) is provided with rotating teeth (331) in an annular array; the control gear (3221) is meshed with the rotating teeth (331).

3. A tobacco leaf baking device for uniform baking according to claim 2, characterized in that: The output end of the heat pump heating device (4) is connected to a heat transfer main pipe (41), the heat transfer main pipe (41) passes through the side wall of the baking room (1) and is arranged inside the baking room (1), a heat transfer branch pipe (42) is arranged in a linear array through the side wall of the heat transfer main pipe (41), the heat transfer branch pipes (42) respectively pass through the lower end of the baking pot (2) and are arranged at the inner center of the baking pot (2), the fixed rod (31) is arranged on both sides of the heat transfer branch pipe (42), and the fixed gear ring (311) and the rotating gear ring (33) are coaxially sleeved on the outer side of the heat transfer branch pipe (42).

4. A tobacco leaf baking device for uniform baking according to claim 3, characterized in that: The tobacco leaf holder (35) comprises a containing cylinder (351), a connecting ring (352), a ring cover (353), a rotating ring (354), a clamping cam (355) and a clamping gear (356); the containing cylinder (351) is fixedly arranged at the lower end of the connecting rod (341); the connecting ring (352) is coaxially fixedly arranged at the lower edge of the containing cylinder (351); a connecting block (3521) is symmetrically fixedly arranged on the side wall of the connecting ring (352); the ring cover (353) is fixedly arranged at the lower end of the connecting block (3521); the ring cover (353) is coaxially arranged at the connecting ring (352); At the bottom, the rotating ring (354) is rotatably arranged on the lower wall of the ring cover (353); a cam shaft (3522) is symmetrically fixedly arranged on the lower end surface of the connecting ring (352); the clamping cam (355) is rotatably arranged on the lower end of the cam shaft (3522); the clamping cam (355) is arranged between the connecting ring (352) and the ring cover (353); the clamping gear (356) is fixedly arranged on the lower wall of the clamping cam (355); the clamping gear (356) is arranged on the inner side of the rotating ring (354); and the clamping gear (356) and the cam shaft (3522) are arranged coaxially.

5. A tobacco leaf baking device for uniform baking according to claim 4, characterized in that: The inner wall of the rotating ring (354) is provided with a circular array of rotating internal teeth (3541), and the clamping gear (356) is meshed with the rotating internal teeth (3541).

6. A tobacco leaf baking device for uniform baking according to claim 5, characterized in that: A rotating thread (3542) is provided at the upper end of the side wall of the rotating ring (354), and the rotating thread (3542) is threadedly connected to the inner wall of the ring cover (353).

7. A tobacco leaf baking device for uniform baking according to claim 6, characterized in that: The side walls of the heat transfer branch pipes (42) are evenly provided with air jets (421).

8. A tobacco leaf baking device for uniform baking according to claim 7, characterized in that: The baking pot (2) is provided with an operating opening (21) on a side wall, an opening door (22) is rotatably provided on a side edge of the operating opening (21), an observation window (221) is provided on the side wall of the opening door (22), a control panel (23) is fixedly provided on the outer side wall of the opening door (22), the control panel (23) is arranged below the observation window (221), and a thermometer and hygrometer (24) is provided on the inner wall of the baking pot (2).

9. A tobacco leaf baking device for uniform baking according to claim 8, characterized in that: The outer upper wall of the baking room (1) is provided with control motors (11) in a linear array, the control motors (11) are respectively opposite to the support blocks (322) in upper and lower positions, the output ends of the control motors (11) are arranged through the upper wall of the baking room (1) and the support blocks (322), and the output ends of the control motors (11) are connected to the rotating shaft of the control gear (3221).

10. The tobacco leaf baking device for uniform baking according to claim 9, characterized in that: A controller (5) is provided on one side of the baking room (1); the control motor (11), the control panel (23), the thermometer and hygrometer (24), and the heat pump heating device (4) are electrically connected to the controller (5) via wires.

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