Oven special for tobacco leaf box type baking process

Abstract

The invention relates to a special oven for a tobacco leaf box type baking process, which comprises a bottom frame covered by a fixedly arranged metal net, width side walls on the bottom frame, metal net side walls and a movable side wall, grooves are correspondingly formed in the inner walls of the two width side walls, the movable side wall comprises a plurality of pull rods, and the ends of the pull rods are located in the grooves. A V-shaped folding sheet is arranged between the pull rods, and a sheet body of the V-shaped folding sheet is hinged to the pull rods through second hinges; the top face of the bottom frame is further provided with a ventilation pipe which penetrates through the width side wall and is provided with a plurality of adjusting air pipes in a communicating mode at equal intervals, each adjusting air pipe comprises a plurality of stacked supporting plates, the supporting plates are provided with coaxially-arranged round holes and flexible pipelines communicating with the round holes, and the flexible pipelines are provided with a plurality of air holes. The oven structure is improved according to an existing box type baking process, the tobacco loading step is simplified again, meanwhile, the hot air path in the oven is optimized, it is ensured that circulating hot air can effectively make contact with tobacco leaves in the oven, and the dehydration and dehumidification effects are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of flue-cured tobacco curing, and in particular relates to a special oven for a tobacco box-type baking process. Background Art

[0002] Flue-cured tobacco curing, also known as baking, is the process of dehydrating fresh tobacco leaves using circulating hot air in the baking room. During the dehydration process, the chemical components inside the tobacco leaves undergo chemical transformations including but not limited to the Maillard reaction, thereby making the chemical components more coordinated and promoting the generation of a variety of aroma components.

[0003] The existing flue-cured tobacco baking process is a three-stage baking process or an improved process based on this process after some parameters are adjusted according to different planting varieties. At the same time, according to different tobacco loading methods, it can be divided into cotton thread braided tobacco, tobacco clip loading tobacco and frame loose leaf baking. The former two are more labor-intensive and time-consuming than the latter, but the gap between tobacco leaves is easier to control and thus the quality of tobacco leaves after baking is easier to control. Box baking is an improved version of the frame loose leaf baking tobacco loading process. It uses a metal mesh with two side panels and a hinged grille door as a carrier. When loading tobacco, first put down the oven and open the grille door. Then use the conveyor belt on the top of the workshop to spread a large amount of tobacco leaves in the oven by itself or with the assistance of manual operation, and then close the grille door and use a forklift to send the oven into the baking room. The corresponding baking room also needs to be modified to achieve a baking room that can accommodate multiple ovens and place them closely. The box baking tobacco loading operation can achieve rapid batch operation through machinery, which has more obvious advantages of saving labor and time, which is very friendly to factory-based intensive baking operations. However, there are also the following problems: 1) The oven is about one person tall but narrow. When placing and introducing tobacco leaves vertically, the staff are blocked by the side walls and the grille door and cannot intervene in the position adjustment of the tobacco leaves. Therefore, the existing technology is to first lay the oven down, then open the grille door and then introduce the tobacco leaves. After the tobacco leaves are placed, the grille door is closed and the oven is lifted and straightened by a crane. The overall operation is cumbersome and dangerous.

[0004] 2) The density of tobacco leaves in the oven is too high, which leads to large wind resistance of hot air circulation in the curing room, and the hot air is not easy to be evenly distributed around the tobacco leaves, resulting in poor curing effect. The overall tobacco leaves after curing are stiff. In addition, during the natural rehumidification process of the tobacco leaves in the curing room after curing, the small gap will also lead to poor rehumidification effect and low efficiency, which will affect the utilization rate of the curing room. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a special oven for the tobacco box-type baking process. The present invention improves the oven structure according to the existing box-type baking process, further simplifies the tobacco loading steps, and also optimizes the hot air path inside the oven, ensuring that the circulating hot air can effectively contact the tobacco leaves in the oven, thereby improving the dehydration and moisture removal effects.

[0006] To achieve the above object, the present invention provides the following technical solutions: A special oven for tobacco box-type baking process, the oven comprises a rectangular bottom frame covered by a fixed metal mesh, two width side walls fixed vertically on the bottom frame, a metal mesh side wall in the length direction and a movable side wall, the inner walls of the two width side walls are correspondingly provided with grooves extending in the height direction, the movable side wall comprises a plurality of pull rods with ends located in the grooves, a V-shaped folding sheet is arranged between the pull rods, the V-shaped folding sheet is composed of two sheets hinged to each other by a first hinge, and the two sheets are respectively hinged to the corresponding pull rods by a second hinge; A ventilation duct is also fixedly provided on the top surface of the bottom frame, and both ends of the ventilation duct pass through the width side wall and the port is flush with the outer wall of the width side wall. Several regulating air ducts are connected on the ventilation duct at equal intervals, and the regulating air duct includes square support plates stacked in sequence from top to bottom, the support plates are connected through a transmission mechanism and coaxially arranged circular holes are provided on the support plates, and a flexible pipe covering the circular hole is provided between adjacent support plates and a plurality of air holes are provided on the flexible pipe.

[0007] Preferably, countersunk holes are provided at both ends of the topmost pull rod, and a plug hole is provided at the top end of the width side wall at the corresponding groove, and the plug pin is inserted through and matched with the countersunk hole of the pull rod, and the two ends of the bottommost pull rod are fixedly connected with the width side wall; The folding sheet is provided with a plurality of through holes.

[0008] Preferably, the transmission mechanism comprises a rotating shaft group vertically rotatably arranged on the side walls in the height direction at the four corners of the support plate, the rotating shaft group comprises two rotating shafts arranged on the upper and lower sides, and the two rotating shafts are sleeved with transmission gears that mesh with each other for transmission; The two rotating shafts are fixed with radially extending hinged plates, and the ends of the hinged plates on the same side of two adjacent support plates are hinged through a hinge structure to form four transmission components that are equidistantly arranged around the circular holes of the support plates.

[0009] Preferably, the hinge structure comprises a locking rod and ear plates extending integrally from both sides of the end of the hinge plate, the two ends of the locking rod are fixedly passed through the corresponding ear plates and a locking gear is fixedly provided on the rod body of the locking rod; The ends of the locking rods of the hinged plates on the same side of two adjacent support plates are rotatably connected to the same hinged gasket, and the locking gears of the two hinged plates are meshed.

[0010] Preferably, the transmission mechanism also includes an electric push rod arranged on one side of the bottom support plate, the fixed part of the electric push rod is inclined and the output end of the electric push rod is hinged with a sliding shaft, and a sliding groove that slides with the sliding shaft is opened on a hinged plate body close to the electric push rod, and the sliding groove extends along the length direction of the hinged plate body.

[0011] Preferably, the ventilation pipe is connected with a support joint pipe for installing a support plate and a push rod, and the top of the support joint pipe is connected with the flexible pipe through a preset circular hole; When the regulating air duct is in a non-working state, the angle of the hinged plates in the same transmission assembly is at a minimum state.

[0012] Preferably, an atomizing pipe is coaxially arranged inside the ventilation pipe, and the atomizing pipe is provided with a through hole at a position corresponding to the supporting joint pipe.

[0013] Preferably, the outer wall sliding sleeve of the atomization pipe is provided with a support ring, and the outer wall of the support ring is connected to the inner wall of the ventilation pipe through a plurality of support rods which are arranged at equal intervals in the circumferential direction and extend radially.

[0014] Preferably, a head plate is further provided on the top of the uppermost support plate, and a rubber plug for sealing the circular hole corresponding to the support plate is provided on the bottom of the head plate.

[0015] Preferably, a spiral wire is also provided in the flexible tube, one end of which passes through the top of the head plate and is used to connect the temperature detection probe and the humidity detection probe, and the other end passes through the ventilation duct to the outside and is used for signal connection to a display device outside the baking room.

[0016] The working process of the present invention is as follows: First, before loading the oven with tobacco, the pull rod is moved down along the groove to the lowest point of the groove, so that the height of the movable side wall of the oven becomes lower and provides space for the staff to operate. At the same time, the multiple V-shaped folding pieces in the folded state cooperate with the width side wall and the length side wall of the metal mesh to provide initial space for accommodating tobacco leaves.

[0017] Then start the existing transmission belt to continuously guide the tobacco leaves sorted in the previous process into the oven, and at the same time manually cooperate to operate the electric push rod as follows: when the filling height of the tobacco leaves in the oven reaches the level that buries the head plate, the output end of the electric push rod begins to extend, causing the sliding shaft to move upward along the slide groove on the corresponding hinged plate and push the hinged plate where the slide groove is located to rotate upward around the rotating axis. At the same time, the corresponding hinged plate above is linked to the corresponding hinge plate to realize the downward rotation of the corresponding hinged plate around its own rotating axis, and then the meshing transmission gears are used again to realize the turnover of the other rotating shaft in the rotating shaft group and the hinged plate, so as to realize the synchronous transmission of all transmission components in sequence, and finally realize the equidistant upward movement of all support plates until the head plate moves above the tobacco leaves.

[0018] Then, tobacco leaves are introduced into the oven again and the above operation is repeated when the filling height of tobacco leaves in the oven reaches the buried head plate, until the entire regulating air duct reaches the maximum height and tobacco leaves are continued to be introduced to fill the oven. The above operation can minimize the positional interference of the regulating air duct's own structure on the tobacco leaf filling process and ensure the filling amount of tobacco leaves inside the oven. Moreover, the mutual engagement of the locking gears can stably maintain the instant position of the hinged plate. At the same time, the maximum length of the regulating air duct should not exceed 3 / 4 of the internal height of the oven to ensure that the regulating air duct is always covered by tobacco leaves. This is because the volume of tobacco leaves will shrink after dehydration and cause the internal material level of the oven to drop. If the height of the regulating air duct is too large, some air holes will be exposed above the tobacco leaves in the later stage, and then some hot air will be discharged without participating in heating, resulting in energy waste and reduced efficiency.

[0019] During the above process, as the filling height of tobacco leaves increases, the staff needs to adaptively lift the pull rod so that the pull rod drives the V-shaped folding sheets to gradually cover the length side of the oven until all the folding sheets form a vertical side wall, and then use the pins to connect the pull rod and the width side wall to form a stable oven. The through holes on the folding sheets can pass hot air flow, and can also be used to insert nail rods to fix some leaves in the oven.

[0020] Then the oven is transported into the baking room by a forklift, and the ventilation pipes of adjacent ovens are connected airtightly (conventional structures such as quick connectors or rubber butt pipes can be preset at the ends of the ventilation pipes). The atomizing pipe can adopt a whole pipe structure and be inserted into the support ring of each oven in sequence from the hole reserved in the baking room. At the same time, the specifications of the ovens are fixed and the positions of the ovens in the baking room are fixed, so the atomizing pipe is inserted at a fixed length to ensure its effective connection with the regulating air duct.

[0021] During baking, hot air is sent into the ventilation duct by the hot air blower, and finally discharged into the gaps between the surrounding tobacco leaves through the air holes on the flexible pipes of each regulating air duct, and finally passed upward through the gaps between the tobacco leaves into the air duct of the baking room and entered the ventilation duct again after being heated. In this way, the tobacco leaves in each oven can be evenly heated and the removed moisture can be discharged by hot air.

[0022] It should be noted that the flexible pipe described in the present application is in a state where the diameter of the two ends is enlarged and the diameter of the middle section is reduced, so that when the regulating air duct is in a non-working state, it can be in a concave and folded state to minimize the gap between adjacent support plates. At the same time, the reason why the regulating air duct in the present application adopts an adjustable length design is, on the one hand, to reduce the space it occupies in the oven and ensure the tobacco filling degree in the oven, and on the other hand, because the annual tobacco curing operation time is short, during the non-working time period, the flexible pipe in a folded state can also reduce the area exposed to the air and delay its own aging.

[0023] Furthermore, in order to improve the baking quality, the present application can set a temperature detection probe and a humidity detection probe on the sealing head at an appropriate position, so as to effectively monitor the temperature and humidity data of each oven, and then effectively adjust the wind speed and hot air temperature to realize a refined modulation process.

[0024] Furthermore, after baking is completed, the present application can introduce the water mist prepared by the high-pressure atomizer into the atomization pipe, and finally discharge it into the tobacco leaves through the flexible pipe, so as to achieve efficient contact between the tobacco leaves and water, and achieve efficient rehumidification of the tobacco leaves, thereby reducing the breakage rate during the subsequent tobacco leaf removal process.

[0025] Compared with the prior art, the present invention has the following advantages: the present invention improves the oven structure according to the existing box-type baking process, simplifies the tobacco loading steps again, and optimizes the hot air path inside the oven, ensuring that the circulating hot air can effectively contact the tobacco leaves in the oven, thereby improving the dehydration and moisture removal effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a special oven for box-type baking process described in a specific implementation method; Figure 2 It is a structural schematic diagram of the ventilation duct and the regulating duct described in the specific implementation method; Figure 3 It is a structural schematic diagram of the regulating air duct in a non-working state according to a specific implementation method; Figure 4 It is a schematic diagram of the structure of the regulating air duct in the maximum length state described in the specific implementation method. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figure 1-4As shown, the oven includes a rectangular bottom frame 1 covered by a fixed metal mesh, two width side walls 12 vertically fixed on the bottom frame, a metal mesh side wall 13 in the length direction and a movable side wall, the inner walls of the two width side walls 12 are correspondingly provided with grooves 14 extending in the height direction, the movable side wall includes a plurality of pull rods 15 whose ends are located in the grooves 14, a V-shaped folding piece 17 is provided between the pull rods, the V-shaped folding piece is composed of two sheets hinged to each other by a first hinge 16, and the two sheets are respectively hinged to the corresponding pull rods 15 by a second hinge 18, countersunk holes are provided at both ends of the pull rod 15 at the top, a plug hole 19 is provided at the top of the width side wall at the corresponding groove, a latch is inserted through and matched with the pull rod countersunk hole, the two ends of the pull rod 15 at the bottom are fixedly connected to the width side wall 12, and a plurality of through holes are provided on the folding piece; A ventilation duct 3 is also fixedly provided on the top surface of the bottom frame, and both ends of the ventilation duct 3 pass through the width side wall 12 and the port is flush with the outer wall of the width side wall 12. Several regulating air ducts 2 are evenly spaced and connected on the ventilation duct 3. The regulating air duct 2 includes square support plates 4 stacked in sequence from top to bottom, and coaxially arranged circular holes 41 are provided on the support plates 4. A flexible pipe 7 covering the circular hole 41 is also provided between adjacent support plates 4, and a plurality of air holes 71 are provided on the flexible pipe 7. The flexible pipe 7 is a transparent plastic pipe belt structure with an enlarged diameter at both ends and a reduced diameter in the middle section.

[0029] The bottom mounting support plate 4 is fixed on the support joint pipe 33, and the top of the support joint pipe 33 is connected to the flexible pipe 7 through a preset circular hole. A head plate 34 is also provided on the top of the top support plate 4, and a rubber plug 35 is provided at the bottom of the head plate 34 for sealing the circular hole of the corresponding support plate 4. A spiral wire 36 is also provided in the flexible pipe 7, one end of the wire 36 penetrates to the top of the head plate 34 and is used to connect the temperature detection probe and the humidity detection probe 8, and the other end penetrates the ventilation pipe to the outside and is used for signal connection to the display device outside the baking room.

[0030] The support plates 4 are connected to each other through a transmission mechanism, which includes an electric push rod 6 arranged on one side of the bottom support plate, and four groups of transmission components 5 arranged at equal intervals around the circular holes of the support plates: The transmission assembly 5 includes four rotating shaft groups 51 arranged on each support plate 4, and the rotating shaft group 51 includes two upper and lower rotating shafts, and the rotating shafts are arranged on the height direction side walls at the four corners of the support plate for vertical rotation, and the two rotating shafts are sleeved with transmission gears 52 that mesh with each other for transmission. At the same time, radially extending hinge plates 53 are fixedly arranged on the two rotating shafts, and ear plates are integrally extended on both sides of the ends of the hinge plates 53 on the same side of the two adjacent support plates 4, and the two ends of the locking rod 55 are fixedly penetrated through the corresponding ear plates, and a locking gear 54 is fixedly arranged on the rod body of the locking rod 55, and the ends of the two adjacent locking rods 55 are rotatably connected with the same hinge gasket 56, and the locking gears of the two hinge plates 53 are meshed; The fixed part of the electric push rod 6 is tilted and the output end of the electric push rod 6 is hinged with a sliding shaft, and a sliding groove 57 that slides with the sliding shaft is provided on a hinge plate 53 close to the electric push rod 6, and the sliding groove 57 extends along the length direction of the hinge plate 53. When the regulating air duct 2 is in a non-working state, the angle of the hinge plate 53 in the same transmission assembly is at a minimum state.

[0031] An atomizing pipe 32 is coaxially arranged inside the ventilation pipe 3. A support ring 37 is slidably sleeved on the outer wall of the atomizing pipe 32. The outer wall of the support ring 37 is connected to the inner wall of the ventilation pipe 3 through a plurality of support rods 31 which are arranged at equal intervals in the circumferential direction and extend radially. The input end of the atomizing pipe 32 is connected to the output end of an external high-pressure atomizer (not shown in the figure), and a through hole is opened in the atomizing pipe 32 at the corresponding support joint pipe 33.

[0032] The working process of the present invention is as follows: First, before loading the oven with tobacco, the pull rod is moved down along the groove 15 to the lowest point of the groove 14, so that the height of the movable side wall of the oven becomes lower and space is provided for the staff to operate. At the same time, the multiple V-shaped folding pieces 16 in the folded state cooperate with the width side wall 12 and the length side wall 13 of the metal mesh to provide initial space for accommodating tobacco leaves.

[0033] Then the existing transmission belt is turned on to continuously guide the tobacco leaves sorted in the previous process into the oven, and at the same time, the electric push rod 6 is manually operated to work as follows: when the filling height of the tobacco leaves in the oven reaches the level that buries the head plate 34, the output end of the electric push rod 6 begins to extend, causing the sliding shaft to move upward along the slide groove 57 on the corresponding hinged plate and push the hinged plate 53 where the slide groove 57 is located to rotate upward around the rotating axis, and at the same time, the corresponding hinged plate 53 above is linked to rotate downward around its own rotating axis through the corresponding hinged piece 56, and then the other rotating shaft in the rotating shaft group 51 and the hinged plate 53 are rotated again through the meshing transmission gear 52, so that all the transmission components 5 are synchronously transmitted in sequence, and finally all the support plates 4 are equidistantly moved upward until the head plate 54 moves above the tobacco leaves.

[0034] Then, tobacco leaves are introduced into the oven again and the above operation is repeated when the filling height of tobacco leaves in the oven reaches the buried head plate, until the entire regulating air duct 2 reaches the maximum height and tobacco leaves are continued to be introduced to fill the oven. The above operation can minimize the positional interference of the regulating air duct 2's own structure on the tobacco leaf filling process and ensure the filling amount of tobacco leaves inside the oven. Moreover, the mutual engagement of the locking gears 54 can stably maintain the instant position of the hinged plate 53. At the same time, the maximum length of the regulating air duct 2 should not exceed 3 / 4 of the internal height of the oven to ensure that the regulating air duct 2 is always in a state of being covered by tobacco leaves. This is because the volume of tobacco leaves will shrink after dehydration and cause the internal material level of the oven to drop. If the height of the regulating air duct 2 is too large, it will cause part of the air holes 71 to be exposed above the tobacco leaves in the later stage, and then part of the hot air will be discharged without participating in heating, resulting in energy waste and reduced efficiency.

[0035] During the above process, as the filling height of tobacco leaves increases, the staff needs to adaptively lift the pull rod 15 so that the pull rod 15 drives the V-shaped folding sheet 17 to gradually cover the length side of the oven until all the folding sheets form a vertical side wall, and then use a latch to connect the pull rod and the width side wall to form a stable oven. The through holes on the folding sheet can pass hot air flow, and can also be used to insert nail rods to fix some leaves in the oven.

[0036] Then the oven is transported into the baking room by a forklift, and the ventilation pipes of the adjacent ovens are connected airtightly (by presetting a quick connector or a rubber butt pipe at the end of the ventilation pipe, etc.). The atomizing pipe can adopt a whole pipe structure, and is sequentially inserted into the support ring of each oven from the hole reserved in the baking room. At the same time, the specifications of the ovens are fixed and the positions of the ovens in the baking room are fixed, so the atomizing pipe is inserted at a fixed length to ensure its effective connection with the regulating air duct.

[0037] During baking, hot air is sent into the ventilation pipe 3 by the hot air blower, and finally discharged into the gaps between the surrounding tobacco leaves through the air holes 71 on the flexible pipe 7 of each regulating air pipe 2, and finally passed upward through the gaps between the tobacco leaves into the air duct of the baking room and entered the ventilation pipe again after being heated. In this way, the tobacco leaves in each oven can be evenly heated and the removed moisture can be discharged by the hot air.

[0038] It should be noted that the flexible pipe 7 described in the present application is in a state where the diameter of the two ends is enlarged and the diameter of the middle section is reduced, so that when the regulating air duct 2 is in a non-working state, it can be in a concave and folded state to minimize the gap between the adjacent support plates 4. At the same time, the reason why the regulating air duct in the present application adopts a length-adjustable design is, on the one hand, to reduce the space it occupies in the oven and ensure the tobacco filling degree in the oven, and on the other hand, because the tobacco flue-curing operation time is short each year, during the non-working period, the flexible pipe in the folded state can also reduce the area exposed to the air and delay its own aging.

[0039] Furthermore, in order to improve the baking quality, the present application can set a temperature detection probe and a humidity detection probe 8 on the sealing head at an appropriate position, so as to effectively monitor the temperature and humidity data of each oven, and then effectively adjust the wind speed and hot air temperature to realize a refined modulation process.

[0040] Furthermore, after baking is completed, the present application can introduce the water mist prepared by the high-pressure atomizer into the atomization pipe 32, and finally discharge it into the tobacco leaves through the flexible pipe 7, so as to achieve efficient contact between the tobacco leaves and water, and achieve efficient rehumidification of the tobacco leaves, thereby reducing the breakage rate during the subsequent tobacco leaf removal process.

Claims

1. A special oven for tobacco box-type baking process, characterized in that: The oven comprises a rectangular bottom frame covered by a fixed metal mesh, two width side walls fixed vertically on the bottom frame, a metal mesh side wall in the length direction and a movable side wall, the inner walls of the two width side walls are provided with grooves extending in the height direction, the movable side wall comprises a plurality of pull rods with their ends located in the grooves, a V-shaped folding sheet is provided between the pull rods, the V-shaped folding sheet is composed of two sheets hinged to each other by a first hinge, and the two sheets are respectively hinged to the corresponding pull rods by a second hinge; A ventilation duct is also fixedly provided on the top surface of the bottom frame, and both ends of the ventilation duct pass through the width side wall and the port is flush with the outer wall of the width side wall. Several regulating air ducts are connected on the ventilation duct at equal intervals, and the regulating air duct includes square support plates stacked in sequence from top to bottom, the support plates are connected through a transmission mechanism and coaxially arranged circular holes are provided on the support plates, and a flexible pipe covering the circular hole is provided between adjacent support plates and a plurality of air holes are provided on the flexible pipe.

2. The special oven for tobacco box-type baking process according to claim 1, characterized in that: The two ends of the pull rod at the top are provided with countersunk holes, and the top of the width side wall is provided with a plug hole at the corresponding groove, and the plug pin is inserted through and matched with the pull rod countersunk hole, and the two ends of the pull rod at the bottom are fixedly connected with the width side wall; The folding sheet is provided with a plurality of through holes.

3. The special oven for tobacco box-type baking process according to claim 1, characterized in that: The transmission mechanism includes a rotating shaft group vertically arranged on the side walls in the height direction at the four corners of the support plate, the rotating shaft group includes two rotating shafts arranged on the upper and lower sides, and the two rotating shafts are sleeved with transmission gears that mesh with each other for transmission; The two rotating shafts are fixed with radially extending hinged plates, and the ends of the hinged plates on the same side of two adjacent support plates are hinged through a hinge structure to form four transmission components that are equidistantly arranged around the circular holes of the support plates.

4. The special oven for tobacco box-type baking process as claimed in claim 3, characterized in that: The hinge structure includes a locking rod and ear plates extending integrally from both sides of the end of the hinge plate, the two ends of the locking rod are fixedly passed through the corresponding ear plates, and a locking gear is fixedly provided on the rod body of the locking rod; The ends of the locking rods of the hinged plates on the same side of two adjacent support plates are rotatably connected to the same hinged gasket, and the locking gears of the two hinged plates are meshed.

5. The special oven for tobacco box-type baking process as claimed in claim 4, characterized in that: The transmission mechanism also includes an electric push rod arranged on one side of the bottom support plate, the fixed part of the electric push rod is inclined and the output end of the electric push rod is hinged with a sliding shaft, and a sliding groove that slides with the sliding shaft is opened on a hinged plate body close to the electric push rod, and the sliding groove extends along the length direction of the hinged plate body.

6. The special oven for tobacco box-type baking process as claimed in claim 5, characterized in that: The ventilation pipe is connected to a support joint pipe for installing a support plate and a push rod, and the top of the support joint pipe is connected to the flexible pipe through a preset circular hole; When the regulating air duct is in a non-working state, the angle of the hinged plates in the same transmission assembly is at a minimum state.

7. The special oven for tobacco box-type baking process according to claim 1, characterized in that: An atomizing pipe is coaxially arranged inside the ventilation pipe, and a through hole is opened in the atomizing pipe at a position corresponding to the supporting joint pipe.

8. The special oven for tobacco box-type baking process as claimed in claim 7, characterized in that: The outer wall sliding sleeve of the atomizing pipe is provided with a support ring, and the outer wall of the support ring is connected to the inner wall of the ventilation pipe through a plurality of support rods which are arranged at equal intervals in the circumferential direction and extend radially.

9. The special oven for tobacco box-type baking process according to claim 1, characterized in that: A head plate is also provided on the top of the uppermost support plate, and a rubber plug for sealing the circular hole of the corresponding support plate is provided on the bottom of the head plate.

10. The special oven for tobacco box-type baking process according to claim 9, characterized in that: The flexible tube is also provided with a spiral wire, one end of which passes through the top of the head plate and is used to connect the temperature detection probe and the humidity detection probe, and the other end passes through the ventilation pipe to the outside and is used for signal connection to the display device outside the baking room.

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