A pre-treatment device for tobacco extraction

Abstract

The application relates to the technical field of tobacco extraction equipment, and discloses a pretreatment device for tobacco extraction, which comprises a base, a crushing cabin and a motor arranged on the base, a worm-shaped discharging cabin communicated with the crushing cabin arranged on one side of the base, an auxiliary feeding mechanism and a blocking prevention mechanism arranged in the crushing cabin; the auxiliary feeding mechanism comprises the crushing cabin and a bottom cabin, the cross section of the bottom cabin is in a trapezoidal shape, a U-shaped material conveying cabin is connected to the bottom of the bottom cabin, and a spiral feeding blade for conveying materials to the worm-shaped discharging cabin is rotationally arranged in the U-shaped material conveying cabin; the blocking prevention mechanism comprises a functional shaft rotationally arranged in the bottom cabin, a plurality of balls are connected to the functional shaft through a plurality of nylon ropes, and the balls are in sliding and rubbing cooperation with the inclined bottom wall of the bottom cabin and the convex ribs of the screen mesh; the device can realize the cooperative work of multiple mechanisms driven by one motor, has low energy consumption and low cost, realizes the online cleaning of the screen mesh without shutdown, has good blocking prevention effect, has compact structure, is convenient to maintain, is stable in operation, has low noise, and effectively improves the tobacco pretreatment efficiency.

Description

Technical Field

[0001] This invention relates to the field of tobacco extraction equipment technology, specifically a pretreatment device for tobacco extraction. Background Technology

[0002] In tobacco extraction, the crushing, screening, and conveying processes in the pretreatment stage are crucial, directly affecting subsequent extraction efficiency and quality. Currently, traditional tobacco crushing devices have several drawbacks: First, they often use multiple motors to drive multiple mechanisms, which not only consumes significant industrial costs and energy but also involves complex disassembly, maintenance, and repair, requires a large footprint, has an inefficient layout, and results in high overall equipment costs. Second, screens are prone to clogging during crushing, leading to uneven material flow and requiring frequent shutdowns for cleaning, severely impacting tobacco crushing efficiency. Third, traditional volute discharge chambers often utilize negative pressure suction to draw the crushed material, requiring high-power, high-speed blades to achieve the ideal negative pressure suction. Prolonged operation not only causes equipment wear and shortens its lifespan but also consumes more industrial energy and generates considerable noise.

[0003] Therefore, we have developed a pretreatment device for tobacco extraction that is compact, energy-efficient, and enables online non-stop cleaning of the screen, thereby improving pretreatment efficiency, to solve the aforementioned technical problems. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a pretreatment device for tobacco extraction, which solves the problems of high energy consumption, easy clogging of screens, large footprint, high equipment cost, and inconvenient maintenance of existing devices.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A pretreatment apparatus for tobacco extraction, comprising: The base is equipped with a crushing chamber and a motor. A volute discharge chamber communicating with the crushing chamber is provided on one side of the base. An auxiliary feeding mechanism and an anti-blocking mechanism are provided in the crushing chamber. The auxiliary feeding mechanism includes a bottom chamber located at the bottom of the crushing chamber, a screen is provided between the crushing chamber and the bottom chamber, the bottom chamber has a trapezoidal cross-section, and a U-shaped conveying chamber is connected to the bottom of the bottom chamber. The U-shaped conveying chamber is rotatably equipped with spiral feeding blades that convey material towards the volute discharge chamber. The anti-blocking mechanism includes a functional shaft rotatably installed in the bottom compartment. Multiple nylon ropes connect multiple swing balls to the functional shaft. The swing balls slide and rub against the inclined bottom wall of the bottom compartment and the ribs of the screen, causing the material in the screen holes to be shaken off the inclined bottom wall of the bottom compartment and then shaken off into the U-shaped conveying compartment.

[0006] Preferably, the U-shaped conveying hopper is disposed between the two sloping bottom walls of the bottom chamber, the functional shaft is located between the sloping bottom wall of the bottom chamber and the convex ribs of the screen, and the multiple throwing balls are distributed at equal intervals on the functional shaft.

[0007] Preferably, a cylindrical chamber is connected between the U-shaped material conveying chamber and the volute discharge chamber, a second drive shaft of the spiral feeding blade is connected to a second drive wheel, and a third drive wheel is synchronously linked to the first drive wheel and the second drive wheel of the motor.

[0008] Preferably, the transmission ratio of the first transmission wheel, the second transmission wheel, and the third transmission wheel is 5:2:1.

[0009] Preferably, the anti-blocking mechanism includes an electric push rod disposed outside the bottom compartment, a first helical gear is slidably sleeved on the functional shaft via a limiting convex sleeve, a convex ring is rotatably connected to the outer edge of the first helical gear via a bearing, one end of the convex ring is rotatably connected to the telescopic end of the electric push rod, and the electric push rod is located at the upper end of the functional shaft.

[0010] Preferably, a bracket is fixedly connected to the base, the bracket is located on one side of the second transmission wheel, and a second helical gear that meshes with the first helical gear is rotatably connected to the bracket. The axle of the second helical gear is connected to the second transmission shaft by a synchronous belt.

[0011] Preferably, the telescopic end of the electric push rod drives the convex ring to perform axial displacement on the functional shaft, so that the first helical gear and the second helical gear complete or disengage their meshing connection.

[0012] Preferably, the third drive wheel is connected to a third drive shaft that is rotatably disposed in the crushing chamber, and multiple sets of hammer blades are connected to the third drive shaft.

[0013] Preferably, a rotating shaft is rotatably connected inside the volute discharge chamber, the rotating shaft is connected to a linkage shaft, the linkage shaft is linked to a third transmission shaft via a linkage belt, and blades are provided on the rotating shaft.

[0014] Preferably, the crushing chamber is provided with a feed inlet, and the volute discharge chamber is provided with a discharge outlet.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a pretreatment device for tobacco extraction, which has the following beneficial effects: 1. The pretreatment device for tobacco extraction is energy-efficient and cost-effective: This device uses only one motor, which, through a reasonable transmission ratio design, synchronously drives the hammer mill, screw feeder, blade discharger, and anti-blocking mechanism. There is no need to configure separate motors for each mechanism, which greatly saves industrial energy and reduces equipment purchase and operating costs. At the same time, the blades of the volute discharge chamber are linked to the third drive shaft through a linkage belt, eliminating the need for a separate high-power motor, further reducing energy consumption and equipment wear, and extending the service life of the equipment.

[0016] 2. This tobacco extraction pretreatment device has a good anti-clogging effect and improves work efficiency: It is equipped with an anti-clogging mechanism, which controls the meshing and disengagement of the first and second helical gears through an electric push rod, so that the screen can be cleaned online without stopping the machine; the ball swinging and the sliding friction between the screen ribs and the inclined bottom wall of the bottom chamber can effectively shake off the material blocking the screen and the material accumulated in the bottom chamber at the same time, achieving a dual effect, avoiding downtime for cleaning, and improving the continuity and work efficiency of tobacco pretreatment.

[0017] 3. The pretreatment device for tobacco extraction has a compact structure and is easy to maintain: The overall structure of the device is simple and compact. The bottom chamber adopts a trapezoidal cross section, and the U-shaped conveying chamber is set between the two sloping bottom walls of the bottom chamber. The layout of each mechanism is reasonable and the footprint is small. At the same time, the connection of each component is simple, which facilitates disassembly, inspection and maintenance, and reduces the later maintenance cost.

[0018] 4. The pretreatment device for tobacco extraction operates stably with low noise: the blades of the volute discharge chamber can generate sufficient negative pressure suction to achieve the feeding purpose without high-speed operation, reducing equipment wear and extending service life; at the same time, a noise reduction layer is set on the inner wall of the volute discharge chamber to effectively reduce operating noise and improve the working environment; good grading effect: through particle size screening by the screen and repeated crushing by the hammer, it can ensure that the particle size of the crushed tobacco material is uniform, meeting the process requirements of subsequent tobacco extraction and improving the extraction quality. Attached Figure Description

[0019] Figure 1 This is a first perspective view of the present invention.

[0020] Figure 2 This is a second perspective view of the present invention.

[0021] Figure 3 This is a side view of the present invention.

[0022] Figure 4 This is the front view of the present invention.

[0023] Figure 5 This is the third perspective view of the present invention.

[0024] Figure 6 This is a perspective view of the front section of the present invention.

[0025] Figure 7 This is a side sectional perspective view of the present invention.

[0026] Figure 8 This is a schematic diagram of the bottom compartment and the spiral discharge compartment of the present invention.

[0027] Figure 9 This is a schematic diagram of the bottom compartment and the volute discharge compartment of the present invention from another perspective.

[0028] Figure 10 This is a side view of the bottom compartment and the volute-shaped discharge compartment of the present invention.

[0029] Figure 11 This is a schematic diagram of the bottom compartment structure of the present invention.

[0030] In the picture: 1. Base; 2. Crushing chamber; 21. Feed inlet; 22. Bottom chamber; 3. Motor; 31. First transmission wheel; 5. Spiral discharge chamber; 51. Blades; 6. Anti-blocking mechanism; 61. Functional shaft; 62. Ball throwing mechanism; 63. First helical gear; 64. Convex ring; 65. Electric push rod; 66. Second helical gear; 67. Synchronous belt; 7. Second drive wheel; 71. Second drive shaft; 72. Spiral feed blade; 8. Third drive wheel; 81. Third drive shaft; 82. Hammer blade; 9. U-shaped conveying hopper; 91. Cylindrical hopper; 10. Linkage shaft; 11. Bracket; 12. Screen; 121. Rib. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "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.

[0033] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] This embodiment provides a pretreatment device for tobacco extraction, which has the following technical features.

[0036] Please see Figures 1 to 11 A pretreatment device for tobacco extraction includes a base 1, a crushing chamber 2 and a motor 3 on the base 1, a volute discharge chamber 5 communicating with the crushing chamber 2 on one side of the base 1, and an auxiliary feeding mechanism and an anti-blocking mechanism 6 in the crushing chamber 2. The auxiliary feeding mechanism includes a bottom chamber 22 located at the bottom of the crushing chamber 2, a screen 12 between the crushing chamber 2 and the bottom chamber 22, the bottom chamber 22 has a trapezoidal cross section, and a U-shaped conveying chamber 9 is connected to the bottom of the bottom chamber 22. A spiral feeding blade 72 is rotatably arranged inside the U-shaped conveying chamber 9 to convey material towards the volute discharge chamber 5. The anti-blocking mechanism 6 includes a functional shaft 61 rotatably installed in the bottom chamber 22. Multiple swing balls 62 are connected to the functional shaft 61 by multiple nylon ropes. The swing balls 62 slide and rub against the inclined bottom wall of the bottom chamber 22 and the protruding ribs 121 of the screen 12, so that the material in the screen holes of the screen 12 is shaken off to the inclined bottom wall of the bottom chamber 22 and then shaken off to the U-shaped conveying chamber 9.

[0037] It should be noted that: base 1 and overall installation layout The base 1 is welded from Q235 steel plate. Anti-slip and shock-absorbing pads are welded to the four corners of the base 1. These pads are made of rubber and are 20mm thick, used to reduce vibration and noise during operation and prevent the base from sliding. The crushing chamber 2 and motor 3 are bolted to the upper surface of the base 1. The crushing chamber 2 is located on the left side of the upper surface of the base 1, and the motor 3 is located on the right side of the crushing chamber 2, ensuring a compact layout and preventing interference. The right inlet end of the volute discharge chamber 5 is connected to the left outlet end of the crushing chamber 2 via a flange. A sealing gasket made of silicone is placed between the flanges to ensure a good seal at the connection and prevent leakage of crushed material.

[0038] The U-shaped conveying hopper 9 is located between the two sloping bottom walls of the bottom chamber 22. The functional shaft 61 is located between the sloping bottom wall of the bottom chamber 22 and the rib 121 of the screen 12. Multiple throwing balls 62 are evenly distributed on the functional shaft 61.

[0039] A cylindrical chamber 91 connects the U-shaped conveying chamber 9 and the volute discharge chamber 5. The second drive shaft 71 of the spiral feeding blade 72 is connected to the second drive wheel 7. The first drive wheel 31 of the motor 3 is synchronously linked with the second drive wheel 7 to the third drive wheel 8.

[0040] The transmission ratio of the first transmission wheel 31, the second transmission wheel 7, and the third transmission wheel 8 is 5:2:1.

[0041] The anti-blocking mechanism 6 includes an electric push rod 65 disposed outside the bottom compartment 22. A first helical gear 63 is slidably sleeved on the functional shaft 61 via a limiting convex sleeve. A convex ring 64 is rotatably connected to the outer edge of the first helical gear 63 via a bearing. One end of the convex ring 64 is rotatably connected to the telescopic end of the electric push rod 65. The electric push rod 65 is located at the upper end of the functional shaft 61.

[0042] It should be noted that: the crushing chamber 2 is made of 304 stainless steel. A feed inlet 21 is welded to the top of the crushing chamber 2. The feed inlet 21 is funnel-shaped to facilitate smooth feeding of tobacco leaves, and the inner wall of the feed inlet 21 is polished smooth to prevent tobacco leaf residue. The bottom of the crushing chamber 2 is integrally welded to the bottom chamber 22. The bottom chamber 22 has an isosceles trapezoidal cross-section, and the angle between the two sloping bottom walls of the bottom chamber 22 and the horizontal plane is 30~60°, facilitating the material to slide down into the U-shaped conveying chamber 9 under gravity, avoiding material accumulation.

[0043] A screen 12 is bolted between the crushing chamber 2 and the bottom chamber 22. The screen 12 is made of stainless steel woven mesh with a mesh size of 0.8mm, which can be adjusted to 0.5-1.2mm according to the actual tobacco extraction requirements. The edge of the screen 12 is pressed and fixed by a pressure ring, which is bolted to the inner wall of the crushing chamber 2, facilitating the disassembly and replacement of the screen 12. An annular rib 121 is integrally formed on the lower surface of the screen 12. The cross-section of the rib 121 is semi-circular with a radius of 5mm, which matches the sliding trajectory of the subsequent ball-spinning 62.

[0044] A bracket 11 is fixedly connected to the base 1. The bracket 11 is located on one side of the second transmission wheel 7. A second helical gear 66 that cooperates with the first helical gear 63 is rotatably connected to the bracket 11. The axle of the second helical gear 66 is connected to the second transmission shaft 71 by a synchronous belt 67.

[0045] The telescopic end of the electric push rod 65, the spiral feeding blade 72, is made of stainless steel. The surface of the blade is coated with a wear-resistant tungsten carbide coating with a thickness of 0.1mm, which extends its service life and improves the smoothness of material conveying, preventing material sticking.

[0046] The third drive wheel 8 is connected to a third drive shaft 81 that is rotatably installed inside the crushing chamber 2. Multiple sets of hammer blades 82 are connected to the third drive shaft 81.

[0047] The volute discharge chamber 5 is rotatably connected to a rotating shaft, which is connected to a linkage shaft 10. The linkage shaft 10 is linked to the third transmission shaft 81 via a linkage belt, and blades 51 are installed on the rotating shaft.

[0048] The crushing chamber 2 is equipped with a feed inlet 21, and the volute discharge chamber 5 is equipped with a discharge outlet.

[0049] Working principle: The device uses only one motor 3, with a reasonable transmission ratio design, to simultaneously drive multiple mechanisms such as crushing, feeding, discharging, and anti-blocking. The specific working process is as follows: 1. Feeding stage The tobacco leaves enter the crushing chamber 2 through the feed inlet 21 and are carried into the area of ​​the high-speed rotating hammer blades 82 under the action of gravity and airflow, in preparation for subsequent crushing.

[0050] 2. Crushing stage The controller starts the motor 3, which drives the third drive wheel 8 via the first drive wheel 31. The third drive wheel 8 drives the third drive shaft 81 to rotate, which in turn drives the multiple sets of hammer blades 82 on the third drive shaft 81 to rotate at high speed, pulverizing the tobacco leaves in the pulverizing chamber 2. The hammer blades 82 pulverize the tobacco leaves to a suitable particle size through multiple actions such as impact, shearing, and kneading. At the same time, the third drive wheel 8 synchronously drives the second drive wheel 7 to rotate. The second drive shaft 71 of the second drive wheel 7 then drives the spiral feeding blades 72 in the U-shaped conveying chamber 9 to rotate. The spiral feeding blades 72 assist in conveying the pulverized material that falls into the U-shaped conveying chamber 9 towards the volute discharge chamber 5.

[0051] 3. Grading Stage The crushed material is classified by particle size through screen 12 under the action of centrifugal force and airflow: fine material with qualified particle size can pass through the screen holes of screen 12 and be sucked in by the negative pressure airflow generated by the rotation of blades 51 in the volute discharge chamber 5 through the cylindrical chamber 91; while coarse material with excessive particle size is intercepted by screen 12 and left in the crushing chamber 2 to continue to be impacted and crushed by hammer blades 82 until it passes through screen 12 after being qualified in particle size.

[0052] 4. Discharge stage The fine material passing through the screen 12 is transported to the subsequent collection device (such as a cyclone separator or a bag filter) through the discharge port of the volute discharge chamber 5 and the subsequent exhaust pipe under the negative pressure generated by the blades 51 inside the volute discharge chamber 5, thus completing the entire process of crushing, grading and conveying of tobacco pretreatment.

[0053] 5. Prevention and Blocking Clearing Phase After the device has been working for a period of time, the screen holes of the screen 12 may be partially blocked by material, and material may also accumulate on the inclined bottom wall of the bottom chamber 22. At this time, the electric push rod 65 is controlled by the controller to operate: the telescopic end of the electric push rod 65 drives the convex ring 64 to move axially towards the support 11 on the functional shaft 61, so that the first helical gear 63 and the second helical gear 66 are meshed and connected; since the second helical gear 66 is linked to the second transmission shaft 71 through the synchronous belt 67, when the second transmission shaft 71 rotates, it will drive the second helical gear 66 to rotate, and then drive the meshing first helical gear 63 and the functional shaft 61 to rotate; when the functional shaft 61 rotates, the multiple swing balls 62 on it will slide and collide with the convex ribs 121 of the screen 12 and the inclined bottom wall of the bottom chamber 22 under the action of centrifugal force, shaking off the material blocked in the screen holes of the screen 12, and at the same time shaking off the material accumulated on the inclined bottom wall of the bottom chamber 22 into the U-shaped conveying chamber 9, so as to avoid the screen 12 being blocked and affecting the material conveying, and to prevent the reduction of crushing efficiency due to shutdown for cleaning.

[0054] After the anti-clogging cleaning is completed, the controller controls the electric push rod 65 to reverse, causing the convex ring 64 to drive the first helical gear 63 to move away from the support 11, disengaging the first helical gear 63 from the second helical gear 66, stopping the function shaft 61 from rotating, and the device resumes normal crushing and conveying operations, realizing online non-stop cleaning of the screen 12.

[0055] In summary, this tobacco extraction pretreatment device requires only one motor 3 to drive multiple mechanisms to work together, resulting in low energy consumption and low cost; it can achieve online non-stop cleaning of the screen 12 with good anti-clogging effect; it has a compact structure, is easy to maintain, operates stably and with low noise, effectively improving the efficiency and quality of tobacco pretreatment.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pretreatment apparatus for tobacco extraction, characterized in that, include: The base (1) is provided with a crushing chamber (2) and a motor (3). A volute discharge chamber (5) communicating with the crushing chamber (2) is provided on one side of the base (1). An auxiliary feeding mechanism and an anti-blocking mechanism (6) are provided in the crushing chamber (2). The auxiliary feeding mechanism includes a bottom chamber (22) located at the bottom of the crushing chamber (2), a screen (12) is provided between the crushing chamber (2) and the bottom chamber (22), the bottom chamber (22) has a trapezoidal cross section, and a U-shaped conveying chamber (9) is connected to the bottom of the bottom chamber (22). A spiral feeding blade (72) is rotatably arranged inside the U-shaped conveying chamber (9) to convey material to the volute discharge chamber (5). The anti-blocking mechanism (6) includes a functional shaft (61) rotatably disposed in the bottom chamber (22). Multiple swing balls (62) are connected to the functional shaft (61) by multiple nylon ropes. The swing balls (62) slide and rub against the inclined bottom wall of the bottom chamber (22) and the protruding ribs (121) of the screen (12), so that the material in the screen hole of the screen (12) is shaken off to the inclined bottom wall of the bottom chamber (22) and then shaken off to the U-shaped conveying chamber (9).

2. The pretreatment apparatus for tobacco extraction according to claim 1, characterized in that, The U-shaped conveying chamber (9) is located between the two inclined bottom walls of the bottom chamber (22), and the functional shaft (61) is located between the inclined bottom wall of the bottom chamber (22) and the rib (121) of the screen (12). The multiple throwing balls (62) are distributed at equal intervals on the functional shaft (61).

3. The pretreatment apparatus for tobacco extraction according to claim 1, characterized in that, A cylindrical chamber (91) is connected between the U-shaped conveying chamber (9) and the volute discharge chamber (5). The second drive shaft (71) of the spiral feeding blade (72) is connected to a second drive wheel (7). The first drive wheel (31) of the motor (3) is synchronously linked with the second drive wheel (7) to a third drive wheel (8).

4. The pretreatment apparatus for tobacco extraction according to claim 3, characterized in that, The transmission ratio of the first transmission wheel (31), the second transmission wheel (7), and the third transmission wheel (8) is 5:2:

1.

5. A pretreatment apparatus for tobacco extraction according to claim 3, characterized in that, The anti-blocking mechanism (6) includes an electric push rod (65) disposed outside the bottom compartment (22). A first helical gear (63) is slidably sleeved on the functional shaft (61) through a limiting convex cam. A convex ring (64) is rotatably connected to the outer edge of the first helical gear (63) through a bearing. One end of the convex ring (64) is rotatably connected to the telescopic end of the electric push rod (65). The electric push rod (65) is located at the upper end of the functional shaft (61).

6. A pretreatment apparatus for tobacco extraction according to claim 5, characterized in that, A bracket (11) is fixedly connected to the base (1). The bracket (11) is located on one side of the second transmission wheel (7). A second helical gear (66) that cooperates with the first helical gear (63) is rotatably connected to the bracket (11). The axle of the second helical gear (66) is connected to the second transmission shaft (71) by a synchronous belt (67).

7. A pretreatment apparatus for tobacco extraction according to claim 5, characterized in that, The telescopic end of the electric push rod (65) drives the convex ring (64) to make axial displacement on the functional shaft (61), so that the first helical gear (63) and the second helical gear (66) complete or disengage their meshing connection.

8. A pretreatment apparatus for tobacco extraction according to claim 7, characterized in that, The third drive wheel (8) is connected to a third drive shaft (81) that is rotatably disposed in the crushing chamber (2), and multiple sets of hammer blades (82) are connected to the third drive shaft (81).

9. A pretreatment apparatus for tobacco extraction according to claim 8, characterized in that, The volute discharge chamber (5) is rotatably connected to a rotating shaft, which is connected to a linkage shaft (10). The linkage shaft (10) is linked to the third transmission shaft (81) via a linkage belt. The rotating shaft is equipped with blades (51).

10. A pretreatment apparatus for tobacco extraction according to claim 9, characterized in that, The crushing chamber (2) is provided with a feed inlet (21), and the volute discharge chamber (5) is provided with a discharge outlet.

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