Tobacco baking machine

Abstract

The present invention discloses a tobacco baking machine, the technical scheme includes a frame, and also includes a tobacco baking device, which is mainly used to bake tobacco that needs to be baked; a tobacco conveying device, which is used to convey the tobacco that needs to be baked to the tobacco baking device for baking, and then convey the baked tobacco out of the tobacco baking device; a hot air flow equalization device, which is configured to equalize the hot air flow required for baking tobacco; the tobacco baking device includes three baking boxes, the lengths of the three baking boxes are set in proportion and the hot air flow directions of the three baking boxes are different, and the relative positions of the three baking boxes can be adjusted. The design of this technical point can equalize the hot air flow used for baking tobacco, and can provide a variety of tobacco baking processes to explore the best process technology.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco equipment, in particular to a tobacco shred roasting machine. Background Art

[0002] Tobacco processing technology is one of the most critical core technologies for blended cigarettes. The effect of tobacco processing will directly affect the style and taste of blended products. The level of tobacco processing technology, to a certain extent, measures the technical content and market competitiveness of such a blended product. The research on tobacco processing technology is generally inseparable from the research on the feeding system and baking process. There are also various specifications of tobacco baking machines on the market to meet the various needs of tobacco processing technology research.

[0003] However, some existing tobacco baking machines have single performance and many shortcomings during the tobacco baking process, such as uneven tobacco baking due to uneven hot air flow; single air flow direction during tobacco baking, resulting in inconsistent baking time and degree of upper and lower tobacco layers, poor baking processability, and low baking efficiency. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a tobacco baking machine that can evenly distribute the hot air flow used for baking tobacco and can provide a variety of tobacco baking processes to explore the best process technology. To achieve the above purpose, the present invention provides the following technical solutions: A tobacco baking machine includes a frame and also includes:

[0005] A tobacco shred baking device, configured to bake the tobacco shreds that need to be baked;

[0006] A tobacco shred conveying device, used to convey the tobacco shreds to be roasted to the tobacco shred roasting device for roasting, and then convey the roasted tobacco shreds out of the tobacco shred roasting device;

[0007] The hot air flow equalizing device is configured to equalize the hot air flow required for baking tobacco.

[0008] By adopting the above technical scheme, the tobacco is conveyed to the tobacco baking device through the tobacco conveying device, and the hot air flow equalization device can equalize the hot air sent to the tobacco baking device, so that the hot air flow for baking the tobacco is evenly distributed, thereby ensuring the consistency of the tobacco baking effect at various locations and improving the tobacco baking effect of the tobacco baking machine.

[0009] The present invention is further configured as follows: the tobacco shred conveying device comprises a sprocket wheel rotatably mounted on the frame, and a conveying chain plate mounted in cooperation with the sprocket wheel;

[0010] The conveying chain plate is configured to convey the shredded tobacco;

[0011] The frame is fixedly connected with a connecting pipe, and two connecting pipes are provided, and the two connecting pipes are arranged on the left and right sides of the conveying chain plate along the width direction of the conveying chain plate;

[0012] A nylon strip is arranged in the connecting pipe, the conveying chain plate is located on the nylon strip and abuts against the nylon strip, and the nylon strip is arranged on the left and right sides of the conveying chain plate along the width direction of the conveying chain plate;

[0013] A sealing material stopper is arranged on the side of the conveying chain plate facing away from the nylon strip, and the sealing material stopper abuts against the connecting pipe.

[0014] By adopting the above technical solution, the nylon strips can support the conveying chain plate and prevent the conveying chain plate from directly contacting the frame or the connecting pipe, thereby reducing the friction of the conveying chain plate during the conveying process, thereby increasing the service life of the conveying chain plate;

[0015] The sealing material stopper can block the tobacco to prevent the tobacco from falling through the gap between the conveying chain plate and the connecting pipe during the conveying process.

[0016] The present invention is further configured as follows: the tobacco baking device comprises a baking oven, wherein three baking ovens are provided, and the tobacco is sequentially passed through the three baking ovens to be baked, and the three baking ovens are respectively a first baking oven, a second baking oven and a third baking oven;

[0017] The length ratio of the first baking oven, the second baking oven and the third baking oven is 1:1:0.75;

[0018] The first baking oven, the second baking oven and the third baking oven all have their own independent air intake devices and exhaust devices, and the hot air flow direction in the first baking oven is the same as the hot air flow direction in the second baking oven, both flow from bottom to top, the hot air flow direction in the first baking oven is opposite to the hot air flow direction in the third baking oven, and the relative positions of the first baking oven, the second baking oven and the third baking oven are interchangeable;

[0019] The exhaust devices corresponding to the hot air flows of the three baking ovens are all connected to the same exhaust pipe, and the length of the exhaust pipe is set to 3-4 times the height of the rack;

[0020] Each of the baking ovens is provided with an air blowing port, and an air blowing pipe is installed at the air blowing port. The air blowing pipe leads into the baking oven and is configured to ventilate and clean the tobacco attached to the baking oven.

[0021] By adopting the above technical solution, three baking ovens are set up, and each baking oven is equipped with independent air intake and exhaust devices, so that the tobacco in each baking oven is baked independently, and the air intake wind speed can be adjusted independently;

[0022] In addition, the hot air flow direction in the third baking oven is opposite to that in the first baking oven and the second baking oven, ensuring that both the upper and lower sides of the tobacco are baked in all directions, thereby improving the baking effect and work efficiency;

[0023] The exhaust pipe is set to be relatively long, which can increase the heat dissipation area of ​​the exhaust pipe and improve the heat dissipation speed, thereby reducing the gas temperature at the exhaust port of the exhaust pipe;

[0024] With the arrangement of the air port and the air pipe, high-pressure gas can be introduced into the air pipe to clean the residual smoke or tobacco debris in the baking oven, which has a simple structure and is easy to operate.

[0025] The present invention is further configured as follows: the hot air flow equalizing device comprises a flow equalizing box, three flow equalizing boxes are provided, and the three flow equalizing boxes are connected to the three baking ovens in a one-to-one correspondence, and the flow equalizing boxes are connected to the air intake device;

[0026] A flow equalizing plate is provided on the side of the flow equalizing box facing away from the air intake device, and a plurality of identical vents are opened on the flow equalizing plate, and the plurality of vents are evenly distributed on the flow equalizing plate;

[0027] The flow equalizing box is configured to equalize the hot air sent into the baking oven by the air intake device;

[0028] The flow balancing box includes an upper surface, a lower surface and a side surface, the vent hole is opened on the upper surface of the flow balancing box, the air intake device is located on one side of the lower surface of the flow balancing box, and the area of ​​the upper surface of the flow balancing box is larger than the area of ​​the lower surface of the flow balancing box;

[0029] Along the direction from the upper surface to the lower surface, the side surface of the current equalizing box is gradually inclined toward the vertical center line of the current equalizing box;

[0030] The conveying chain plate is provided with a plurality of small holes for ventilation, and the plurality of small holes are evenly distributed on the conveying chain plate.

[0031] By adopting the above technical solution, on the one hand, the shape of the equalizing box is designed so that the upper surface area is larger than the lower surface area, so that the diffusion space of the hot air entering the equalizing box gradually expands during the flow process, and the hot air is evenly distributed during the diffusion process; and a plurality of vents are provided on the equalizing plate on the equalizing box, and the hot air is evenly distributed through the vents into the tobacco baking oven to bake the tobacco on the conveying chain plate, thus completing the secondary equalization of the hot air flow; and a plurality of small holes are provided on the conveying chain plate, and the hot air flowing out of the equalizing box enters the baking oven through the plurality of small holes on the conveying chain plate, and the plurality of small holes on the conveying chain plate can evenly distribute the hot air flow. This design method enables the equalizing box and the conveying chain plate to cooperate in three-level equalization of the hot air flow, thereby improving the tobacco baking effect.

[0032] The present invention is further configured to include a self-cleaning device, which is detachably and fixedly mounted on the frame, and is configured to clean the conveying chain plate.

[0033] Furthermore, the self-cleaning device comprises a cleaning brush and a brush roller, the cleaning brush and the brush roller are both provided with bristles, and the bristles on the cleaning brush and the brush roller are both in contact with the conveying chain plate;

[0034] The cleaning brush is located on the side of the conveying chain plate that contacts the tobacco;

[0035] The brush roller is located on a side of the conveying chain plate facing away from the cleaning brush;

[0036] The number of the cleaning brush and the number of the brush rollers are both two, and the two cleaning brushes are symmetrically distributed on the left and right sides of the frame along the conveying direction of the conveying chain plate, and the two brush rollers are symmetrically distributed on the left and right sides of the frame along the conveying direction of the conveying chain plate.

[0037] By adopting the above technical solution, the cleaning brush and the brush roller can clean the conveyor chain plate, and clean off the tobacco debris attached to the conveyor chain plate, so as to prevent the tobacco debris from sticking to the conveyor chain plate and being baked multiple times and then being brought into the baked tobacco, affecting the baking effect of the tobacco;

[0038] The cleaning brush and the brush roller are respectively arranged on both sides of the conveying chain plate, so that both the inner and outer sides of the conveying chain plate can be cleaned, and the cleaning effect is good.

[0039] The present invention is further configured to include a tobacco layer thickness adjustment device configured to adjust the thickness of the tobacco layer conveyed by the conveying chain plate into the baking oven.

[0040] Furthermore, the tobacco layer thickness adjustment device comprises a tobacco layer thickness coarse adjustment device and a tobacco layer thickness fine adjustment device;

[0041] The tobacco layer thickness coarse adjustment device comprises a tobacco feed box, and a mounting block is integrally arranged on the tobacco feed box;

[0042] The frame is provided with a connecting portion that cooperates with the mounting block, and the mounting block and the connecting portion are both provided with mounting holes that cooperate and communicate with each other, and the mounting holes are provided in plurality, and the plurality of mounting holes are evenly distributed on the connecting portion and the mounting block in the vertical direction;

[0043] The tobacco layer thickness fine-adjusting device is arranged on the baking oven, and comprises a baffle plate. Each baking oven is provided with a baffle plate at both left and right ends along the tobacco inlet and outlet direction, and the baffle plate is configured to control the thickness of the tobacco layer entering each baking oven;

[0044] Each of the baking ovens is provided with a regulating device for controlling the up and down movement of the baffle plate.

[0045] By adopting the above technical solution, the height of the tobacco feed box is adjusted by installing the mounting block and the connecting part together using mounting holes at different positions, thereby adjusting the gap between the lowest end of the tobacco feed box and the conveying chain plate, thereby controlling the adjustment of the thickness of the tobacco layer on the conveying chain plate;

[0046] The tobacco layer thickness coarse adjustment device and the tobacco layer thickness fine adjustment device are provided to control and adjust the thickness of the tobacco layer entering the baking oven, and the thickness of the tobacco layer can be changed according to different requirements and processes.

[0047] The present invention is further configured as follows: a protective plate is arranged on the frame, two protective plates are arranged, and the two protective plates are symmetrically distributed on the left and right sides of the frame along the tobacco conveying direction, and the two protective plates are located at the outermost sides of the frame.

[0048] By adopting the above technical scheme, since the temperature of the hot air flow required in the tobacco baking process is relatively high, the temperatures of the conveyor chain plates, tobacco baking boxes and other devices are relatively high during the operation of the tobacco baking machine. The protective plates can protect the conveyor chain plates, tobacco baking boxes and other devices, and can prevent operators from being burned due to careless contact with the conveyor chain plates and other devices during operation.

[0049] The present invention is further configured as follows: a plurality of heat dissipation holes are provided on the protection plate.

[0050] By adopting the above technical solution, the heat dissipation holes can accelerate the heat dissipation of the conveyor chain plate, tobacco baking device, etc. as soon as possible, thereby accelerating the heat dissipation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Hereinafter, some specific embodiments of the present invention will be described in detail with reference to the accompanying drawings and embodiments in a non-limiting manner. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale.

[0052] Figure 1 It is a structural schematic diagram of the tobacco baking machine of the present invention;

[0053] Figure 2 A is a partial enlarged view of the tobacco baking machine of the present invention;

[0054] Figure 3 FIG. B is a partial enlarged view of the tobacco baking machine of the present invention;

[0055] Figure 4 It is a left side view of the tobacco baking machine of the present invention (excluding the exhaust pipe);

[0056] Figure 5 FIG. C is a partial enlarged left view of the tobacco baking machine of the present invention;

[0057] Figure 6 It is a structural schematic diagram of a baking box in a tobacco baking machine of the present invention;

[0058] Figure 7 It is a structural schematic diagram of a flow equalizing box in a tobacco baking machine of the present invention;

[0059] Figure 8 It is a partial enlarged view D of the flow equalizing box in the tobacco baking machine of the present invention.

[0060] Among them, 1. frame; 2. sprocket; 3. conveying chain plate; 3a. small hole; 4. connecting pipe; 5. nylon strip; 6. sealing block; 7. first baking oven; 8. second baking oven; 9. third baking oven; 10. air intake device; 11. exhaust device; 12. exhaust pipe; 13. air outlet; 14. air blowing pipe; 15. flow equalizing box; 16. flow equalizing plate; 16a. air vent; 17. cleaning brush; 18. brush roller; 19. feed box; 20. mounting block; 21. connecting part; 22. mounting hole; 23. block plate; 24. regulating device; 25. protective plate; 25a. heat dissipation hole. DETAILED DESCRIPTION

[0061] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will refer to Figures 1 to 8 An embodiment of a tobacco baking machine of the present invention is further described.

[0062] Figure 1 is a schematic diagram of the structure of the tobacco baking machine of the present invention, Figure 1It can be seen that the tobacco baking machine described in the present invention includes a frame 1, a tobacco baking device for baking tobacco, a tobacco conveying device for conveying tobacco, and a hot air flow equalizing device for equalizing the hot air flow required for tobacco baking.

[0063] The tobacco conveying device includes a sprocket wheel 2 rotatably mounted on a frame 1, and a conveying chain plate 3 mounted in cooperation with the sprocket wheel 2. The tobacco conveying device also includes a motor (not shown in the figure). The motor drives the sprocket wheel 2 to rotate, and the rotation of the sprocket wheel 2 drives the conveying chain plate 3 to convey the tobacco. Figure 4 and Figure 5 It can be known that a connecting tube 4 is fixedly connected to the frame 1, and the connecting tube 4 includes a vertical upward protrusion. There are two connecting tubes 4, and the two connecting tubes 4 are arranged on the left and right sides of the conveying chain plate 3 along the width direction of the conveying chain plate 3. The connecting tube 4 can be designed as an integral part to be consistent with the length of the part of the conveying chain plate 3 that receives the tobacco, or it can be set to multiple pieces along the conveying direction of the conveying chain plate 3 and installed on the frame 1 at intervals; a nylon strip 5 is sleeved on the protruding part of the connecting tube 4, and the length of the nylon strip 5 is preferably matched with the length of the connecting tube 4. The conveying chain plate 3 is mounted on the nylon strip 5 and abuts against the nylon strip 5. During the conveying process, the conveying chain plate 3 abuts and rubs against the nylon strip 5. The nylon strip 5 is a non-metallic material. When it abuts and rubs against the metal conveying chain plate 3, the friction force is smaller than the friction force between metal and metal, thereby reducing the friction of the conveying chain plate 3 and improving the service life of the conveying chain plate 3.

[0064] In addition, by Figure 5 It can be seen that in order to prevent tobacco from leaking through the gap between the conveying chain plate 3 and the connecting tube 4 during the conveying process, the present invention is further configured such that a sealing block 6 is provided on the conveying chain plate 3, and the sealing block 6 is pasted on the side of the conveying chain plate 3 facing away from the nylon strip 5. The shape of the sealing block 6 matches the conveying chain plate 3, and the sealing block 6 abuts against the connecting tube 4. The sealing block 6 blocks the gap between the connecting tube 4 and the conveying chain plate 3, thereby preventing tobacco from falling. The sealing block 6 is also made of nylon material to reduce the relative friction between the sealing block 6 and the connecting tube 4.

[0065] The tobacco baking device in the tobacco baking machine described in the present invention includes a baking box, which is connected to an air intake device 10 and an exhaust device 11. The air intake device 10 preferably uses a hot air blower to send hot air into the baking box, and the hot air bakes the tobacco conveyed to the baking box, and then the exhaust gas is discharged through the exhaust device 11. Among them, there are three baking ovens, namely a first baking oven 7, a second baking oven 8 and a third baking oven 9. The tobacco is baked multiple times through the three baking ovens in sequence to achieve the final baking effect. The first baking oven 7, the second baking oven 8 and the third baking oven 9 are all connected to their own independent air intake devices 10 and exhaust devices 11, and the flow direction of the hot air flow in the first baking oven 7 is the same as the flow direction of the hot air flow in the second baking oven 8, both flowing from bottom to top, and the flow direction of the hot air flow in the first baking oven 7 is opposite to the flow direction of the hot air flow in the third baking oven 9. The specific implementation is: by Figure 1 It can be seen that the air intake device 10 corresponding to the first baking oven 7 is installed below the first baking oven 7, and the exhaust device 11 corresponding to the first baking oven 7 is installed above the first baking oven; similarly, the air intake device 10 corresponding to the second baking oven 8 is also installed below the second baking oven 8, and the exhaust device 11 corresponding to the second baking oven 8 is installed above the second baking oven 8; when the tobacco passes through the first baking oven 7 and the second baking oven 8, it is baked by the hot air flow of the first baking oven 7 and the second baking oven 8 flowing from bottom to top. As for the third baking oven 9, the air intake device 10 corresponding to the third baking oven 9 is installed above the third baking oven 9, and the exhaust device 11 corresponding to the third baking oven 9 is installed below the third baking oven 9, so that the tobacco entering the third baking oven 9 is baked by the hot air flow from top to bottom. In this way, the lowest end of the tobacco layer can be baked in the first baking oven 7 and the second baking oven 8, and the top end of the tobacco layer can be baked in the third baking oven 9, so as to ensure that the tobacco layer is baked in all directions, thereby improving the tobacco baking effect and tobacco baking efficiency.

[0066] Different baking processes are required for baking different tobacco shreds. In order to facilitate the exploration of better baking processes during tobacco shred baking, the present invention is further configured such that the mutual positions between the first baking oven 7, the second baking oven 8 and the third baking oven 9 are adjustable, that is, the tobacco shreds can pass through the first baking oven 7, the second baking oven 8 and the third baking oven 9 in sequence, or can pass through the first baking oven 7, the third baking oven 3 and the second baking oven 8 in sequence, or can pass through the third baking oven 9, the first baking oven 7 and the second baking oven 8 in sequence. The lengths of the first baking oven 7, the second baking oven 8 and the third baking oven 9 are proportionally arranged, the length of the first baking oven 7 is L1, the length of the second baking oven 8 is L2, and the length of the third baking oven 9 is L3, and the preferred ratio is L1:L2:L3=1:1:0.75.

[0067] In the exhaust process of the present invention, the exhaust device 11 corresponding to the first baking box 7, the exhaust device 11 corresponding to the second baking box 8 and the exhaust device 11 corresponding to the third baking box 9 are all connected to the same exhaust pipe 12, so that the exhaust of the three baking boxes is discharged through the same exhaust pipe 12. The hot air temperature required in the tobacco baking process is relatively high, and the exhaust gas discharged will also have a relatively high temperature. Therefore, the exhaust pipe 12 in the present invention is set to be relatively long, and the length is 3-4 times the height of the frame 1, which increases the heat dissipation area of ​​the exhaust pipe 12, improves the heat dissipation speed, and thus reduces the gas temperature at the exhaust port of the exhaust pipe 12.

[0068] During the process of baking the tobacco in the baking oven, in order to facilitate the cleaning of the tobacco or debris attached to the first baking oven 7, the second baking oven 8 and the third baking oven 9, Figure 6 It can be seen that the first baking oven 7, the second baking oven 8 and the third baking oven 9 are all provided with an air blowing port 13, and an air blowing pipe 14 is installed at the air blowing port 13. One end of the air blowing pipe 14 extends into the first baking oven 7 or the second baking oven 8 or the third baking oven 9, and the other end is connected to an air supply device such as an air pump (not shown in the figure). When the air pump is working, the air delivered is blown into the first baking oven 7 or the second baking oven 8 or the third baking oven 9 through the air blowing pipe 8, so that the tobacco shreds or debris attached to the side wall of the baking oven can be blown off and then taken out.

[0069] In addition, observation windows are provided on the first baking oven 7, the second baking oven 8 and the third baking oven 9, and two observation windows are provided on each baking oven, and the two observation windows are symmetrically distributed on both sides of the first baking oven 7, the second baking oven 8 and the third baking oven 9. A lighting device is installed on the side where one of the observation windows is located, and the lighting device is directly facing one of the observation windows. The observation window is equipped with an observation glass, so that the working conditions in the first baking oven 7, the second baking oven 8 and the third baking oven 9 can be clearly viewed. When the lighting device is turned on, the first baking oven 7, the second baking oven 8 and the third baking oven 9 can be illuminated, which is convenient for the observer to observe.

[0070] Since the first baking oven 7, the second baking oven 8 and the third baking oven 9 are three independent baking ovens, they are equipped with independent air intake devices 10 and exhaust devices 11, and independent humidity and temperature can be set in each baking oven, and independent wind speed can be controlled. In the present invention, temperature and humidity sensors and wind speed sensors are preferably installed on the first baking oven 7, the second baking oven 8 and the third baking oven 9, and the temperature and humidity sensors and wind speed sensors corresponding to each baking oven detect and adjust the temperature, humidity and wind speed in the corresponding baking oven.

[0071] The hot air flow equalization device in the tobacco baking machine of the present invention comprises a flow equalization box 15, which is provided in three pieces and is connected to the three baking boxes one by one, and the flow equalization box 15 is connected to the air intake device 10. Figure 7 As shown, the flow equalizing box 15 includes an upper surface, a lower surface and a side surface. The air intake device 10 is arranged on one side of the lower surface of the flow equalizing box 15 and is connected to the flow equalizing box 15 through the lower surface. The hot air flow sent by the air intake device 10 enters the flow equalizing box 15. After the flow equalizing box 15 equalizes the hot air flow, it flows out of the flow equalizing box 15 to bake the tobacco. For the flow equalizing box 15 in the present invention, its side surface is an inclined surface, and along the upper surface of the flow equalizing box 15 toward the lower surface of the flow equalizing box 15, the side surface of the flow equalizing box 15 is gradually inclined toward the vertical center line direction of the flow equalizing box 15, and the area of ​​the upper surface of the flow equalizing box 15 is larger than the area of ​​the lower surface of the flow equalizing box 15. At this time, the hot air flow sent by the air intake device 10 first enters the small area of ​​the flow equalizing box 15, and then gradually diffuses to the side with a larger area, and the hot air flow is evenly distributed during the gradual diffusion process. The flow equalizing box 15 can be configured as a cone or a trapezoid. The present invention preferably uses a trapezoidal design, that is, the side surfaces are four, and two of them are arranged opposite to each other.

[0072] In order to make the hot air flow have a better effect on the baking of tobacco, the hot air flow should be well evenly distributed. The present invention is further configured such that an evenly distributed plate 16 is provided on the side of the evenly distributed plate 15 facing away from the air intake device 10. The evenly distributed plate 16 is integrally arranged with the upper surface of the evenly distributed plate 15. A plurality of vents 16a are provided on the evenly distributed plate 16. The hot air flow diffused and evenly distributed in the evenly distributed plate 16 flows to the tobacco to bake the tobacco through the plurality of vents 16a. The plurality of vents 16a can perform secondary evenly distributed hot air flow, improve the evenly distributed hot air flow, and thus improve the baking quality of the tobacco.

[0073] In addition, a plurality of small holes 3a are provided on the conveying chain plate 3, and the plurality of small holes 3a are evenly distributed on the conveying chain plate 3. The hot air flow first passes through the flow equalizing box 15 and then reaches the conveying chain plate 3. The plurality of small holes 3a on the conveying chain plate 3 again equalize the hot air flow, so that the tobacco drying machine of the present invention has a three-level equalization function for the hot air flow, thereby improving the baking quality of the tobacco. A preferred embodiment of the present invention is that the diameter of the small hole 3a is 2 mm, and the distance between two adjacent small holes 3a is 4 mm.

[0074] Brushes are arranged around the upper surface of the flow equalizing box 15, and the brushes include a bristle carrier and bristles arranged on the bristle carrier. The length of the bristles is greater than or equal to the distance between the upper surface of the flow equalizing box 15 and the conveying chain plate 3. When the conveying chain plate 3 sags due to gravity, the bristles will bend and drill into the gap where the conveying chain plate 3 and the flow equalizing box 15 contact, avoiding the hot air flow from the gap and reducing the loss of heat source.

[0075] A cleaning window is provided on the side of the flow balancing box 15, and a window door is installed in cooperation with the cleaning window. The window door is detachably installed on the side, and the window door is used to open or close the cleaning window. When it is necessary to clean the inside of the flow balancing box 15, the window door can be opened, and the operator cleans the inside through the cleaning window, which has a simple structure and is easy to operate.

[0076] In addition, the tobacco baking machine of the present invention further includes a self-cleaning device, which is detachably fixedly mounted on the frame 1 and configured to clean the conveying chain plate 3, and the self-cleaning device includes a cleaning brush 17 and a brush roller 18, both of which are provided with bristles, and the bristles on the cleaning brush 17 and the brush roller 18 are in contact with the conveying chain plate 3. Among them, the cleaning brush 17 is located on the side of the conveying chain plate 3 that contacts the tobacco, and cleans the side of the conveying chain plate 3 that contacts the tobacco; the brush roller 18 is located on the side of the conveying chain plate 3 that faces away from the cleaning brush 17, and the brush roller 18 cleans the side of the conveying chain plate 3 that faces away from the tobacco. The cleaning brush 17 and the brush roller 18 can clean both the front and back sides of the conveying chain plate to prevent tobacco debris from sticking to the conveying chain plate 3.

[0077] The conveying chain plate 3 in the present invention is a first-connected annular arrangement, including a top, a bottom and two sides, and the cleaning brush 17 and the brush roller 18 are both provided in two, and the two cleaning brushes 17 are respectively installed on the frame 1 to clean the two sides of the conveying chain plate 3, and the two brush rollers 18 are respectively installed on the frame 1 to clean the two sides of the conveying chain plate 3. At the same time, the brush roller 18 can also be set to four, two brush rollers 18 clean the two sides of the conveying chain plate 3, and the other two brush rollers 18 can be installed at the lower side of the bottom of the conveying chain plate 3, which can not only clean the conveying chain plate 3, but also support the bottom of the conveying chain plate 3. When the bottom position of the conveying chain plate 3 tends to sag due to gravity, the lower brush roller can support it to prevent the conveying chain plate 3 from sagging and mopping the ground.

[0078] Furthermore, the tobacco baking machine of the present invention also includes a tobacco layer thickness adjustment device, which is configured to adjust the thickness of the tobacco layer to be baked, including a tobacco layer thickness coarse adjustment device and a tobacco layer thickness fine adjustment device. The tobacco layer thickness coarse adjustment device is mainly arranged on the frame 1, including a fixed feed box 19, a connecting portion 21 is integrally welded on the frame 1, and a mounting block 20 is integrally welded on the feed box 19. The mounting block 20 is connected with the connecting portion 21 in cooperation, and can be fixedly connected by bolts stacked together, or the mounting block 20 can be sleeved on the connecting portion 21, or the connecting portion 21 can be sleeved on the mounting block 20 and then fixed by bolts. A plurality of matching mounting holes 22 are provided on the mounting block 20 and the connecting portion 21 at the same time. The mounting holes 22 are evenly arranged in the vertical direction on the mounting block 20 or the connecting portion 21. The mounting block 20 and the connecting portion 21 are connected at different mounting holes 22, so that the height of the feed box 19 is also different, and the gap between the lowest end of the feed box 19 and the conveying chain plate 3 is also different, so that the thickness of the tobacco layer entering the baking oven can be roughly adjusted. The tobacco layer thickness fine-tuning device is provided on the baking oven, and the first baking oven 7, the second baking oven 8 and the third baking oven 9 are all provided with the tobacco layer thickness fine-tuning device. The specific implementation method is as follows: a baffle plate 23 is installed on the first baking oven 7, the second baking oven 8 and the third baking oven 9, and the baffle plates 23 on the first baking oven 7, the second baking oven 8 and the third baking oven 9 are all set to two, and the two baffle plates 23 are located on the left and right sides of each baking oven along the tobacco inlet and outlet direction. The first baking box 7, the second baking box 8 and the third baking box 9 are all equipped with a regulating device 24 for controlling the up and down movement of the baffle plate 23. The lower the position of the baffle plate 23 is, the smaller the distance between the lowest end of the baffle plate 23 and the conveying chain plate 3 for conveying tobacco is, and the smaller the thickness of the tobacco layer that can be conveyed is. One mode of the regulating device 24 can adopt a transmission mode of a lead screw nut, mainly through holes are provided on the first baking box 7, the second baking box 8 and the third baking box 9, and the axis of the through hole is arranged parallel to the up and down movement direction of the baffle plate 23. A threaded rod is arranged on the baffle plate 23, and a nut is connected to the through hole for rotation. The threaded rod is installed in cooperation with the nut thread. Rotating the nut can drive the threaded rod to move up and down, thereby driving the baffle plate 23 to move up and down to complete the fine adjustment of the thickness of the tobacco layer. Of course, the structure of the regulating device 7 is not limited to the above-mentioned mode. The height adjustment mode of the feed box 19 is not limited to the above-mentioned mode.

[0079] During the operation of the tobacco drying machine, the temperature of the hot air flow is high, and the metal material has good thermal conductivity, which will make the temperature of the drying oven shell, the shell of the flow box 15, the frame 1, the conveying chain plate 3 and other equipment high, which is easy to burn the operator. Therefore, for safety considerations, a protective plate 25 is set on the frame 1, and the protective plate 25 is set in two. The two protective plates 25 are symmetrically distributed on the left and right sides of the frame 1 along the tobacco transmission direction, and the protective plate 25 is located at the outermost side of the frame 1, that is, the drying oven, the flow box 15, the frame 1, the conveying chain plate 3 and the like are all located between the two protective plates 25. Under the protection of the protective plate 25, the operator will not accidentally contact the high-temperature metal material, etc., and the safety performance is high. A plurality of heat dissipation holes 25a are opened on the protective plate 25, which can accelerate the heat dissipation of the drying oven, the flow box 15, the frame 1, the conveying chain plate 3 and other equipment protected between the two protective plates 25.

[0080] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, any improvements and modifications made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A tobacco baking machine, comprising a frame, characterized in that: Also includes: A tobacco shred baking device, configured to bake the tobacco shreds that need to be baked; The tobacco shred baking device comprises a baking oven, wherein three baking ovens are provided, and the tobacco shreds are sequentially passed through the three baking ovens to be baked, and the three baking ovens are respectively a first baking oven, a second baking oven and a third baking oven; The length ratio of the first baking oven, the second baking oven and the third baking oven is 1:1:0.75; The first baking oven, the second baking oven and the third baking oven all have their own independent air intake devices and exhaust devices, and the hot air flow direction in the first baking oven is the same as the hot air flow direction in the second baking oven, both flow from bottom to top, the hot air flow direction in the first baking oven is opposite to the hot air flow direction in the third baking oven, and the relative positions of the first baking oven, the second baking oven and the third baking oven are interchangeable; The exhaust devices corresponding to the hot air flows of the three baking ovens are all connected to the same exhaust pipe, and the length of the exhaust pipe is set to 3-4 times the height of the rack; Each of the baking ovens is provided with an air blowing port, and an air blowing pipe is installed at the air blowing port, and the air blowing pipe is passed into the baking oven and is configured to ventilate and clean the tobacco attached to the baking oven; A tobacco shred conveying device, used to convey the tobacco shreds to be roasted to the tobacco shred roasting device for roasting, and then convey the roasted tobacco shreds out of the tobacco shred roasting device; The tobacco shred conveying device comprises a sprocket wheel rotatably mounted on the frame, and a conveying chain plate mounted in cooperation with the sprocket wheel; the conveying chain plate is configured to convey the tobacco shreds; The frame is fixedly connected with a connecting pipe, and two connecting pipes are provided, and the two connecting pipes are arranged on the left and right sides of the conveying chain plate along the width direction of the conveying chain plate; A nylon strip is arranged in the connecting pipe, the conveying chain plate is located on the nylon strip and abuts against the nylon strip, and the nylon strip is arranged on the left and right sides of the conveying chain plate along the width direction of the conveying chain plate; A sealing stopper is provided on the side of the conveying chain plate facing away from the nylon strip, and the sealing stopper abuts against the connecting pipe; A hot air flow equalizing device is configured to equalize the hot air flow required for baking the shredded tobacco; The hot air flow equalizing device comprises a flow equalizing box, wherein three flow equalizing boxes are provided, and the three flow equalizing boxes are connected to the three baking ovens in a one-to-one correspondence, and the flow equalizing boxes are connected to the air intake device; A flow equalizing plate is provided on the side of the flow equalizing box facing away from the air intake device, and a plurality of identical vents are opened on the flow equalizing plate, and the plurality of vents are evenly distributed on the flow equalizing plate; The flow equalizing box is configured to equalize the hot air sent into the baking oven by the air intake device; The flow balancing box includes an upper surface, a lower surface and a side surface, the vent hole is opened on the upper surface of the flow balancing box, the air intake device is located on one side of the lower surface of the flow balancing box, and the area of ​​the upper surface of the flow balancing box is larger than the area of ​​the lower surface of the flow balancing box; Along the direction from the upper surface to the lower surface, the side surface of the current equalizing box is gradually inclined toward the vertical center line of the current equalizing box; The conveying chain plate is provided with a plurality of small holes for ventilation, and the plurality of small holes are evenly distributed on the conveying chain plate; The tobacco layer thickness adjusting device is configured to adjust the thickness of the tobacco layer conveyed by the conveying chain plate into the baking oven.

2. The tobacco baking machine according to claim 1, characterized in that: Also includes: A self-cleaning device is detachably and fixedly mounted on the frame, and is configured to clean the conveying chain plate.

3. The tobacco baking machine according to claim 2, characterized in that: The self-cleaning device comprises a cleaning brush and a brush roller, the cleaning brush and the brush roller are both provided with bristles, and the bristles on the cleaning brush and the brush roller are both in contact with the conveying chain plate; The cleaning brush is located on the side of the conveying chain plate that contacts the tobacco; The brush roller is located on a side of the conveying chain plate facing away from the cleaning brush; The number of the cleaning brush and the number of the brush rollers are both two, and the two cleaning brushes are symmetrically distributed on the left and right sides of the frame along the conveying direction of the conveying chain plate, and the two brush rollers are symmetrically distributed on the left and right sides of the frame along the conveying direction of the conveying chain plate.

4. The tobacco baking machine according to claim 1, characterized in that: The tobacco layer thickness adjustment device comprises a tobacco layer thickness rough adjustment device and a tobacco layer thickness fine adjustment device; The tobacco layer thickness coarse adjustment device comprises a tobacco feed box, and a mounting block is integrally arranged on the tobacco feed box; The frame is provided with a connecting portion that cooperates with the mounting block, and the mounting block and the connecting portion are both provided with mounting holes that cooperate and communicate with each other, and the mounting holes are provided in plurality, and the plurality of mounting holes are evenly distributed on the connecting portion and the mounting block in the vertical direction; The tobacco layer thickness fine-adjusting device is arranged on the baking oven, and comprises a baffle plate. Each baking oven is provided with a baffle plate at both left and right ends along the tobacco inlet and outlet direction, and the baffle plate is configured to control the thickness of the tobacco layer entering each baking oven; Each of the baking ovens is provided with a regulating device for controlling the up and down movement of the baffle plate.

5. The tobacco baking machine according to claim 1, characterized in that: The frame is provided with a protective plate, wherein two protective plates are provided, and the two protective plates are symmetrically distributed on the left and right sides of the frame along the tobacco shred conveying direction, and the two protective plates are located at the outermost sides of the frame.

6. The tobacco baking machine according to claim 5, characterized in that: The protection plate is provided with a plurality of heat dissipation holes.

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