Tobacco leaf thinning device

Abstract

The utility model provides a tobacco leaf thinning device. The tobacco leaf thinning device comprises a first conveying device; at least one loosening roller; the first material spreading device comprises a second conveying device and a first material stirring roller, a gap is formed between the first conveying device and the second conveying device in the conveying direction of the first conveying device, at least one loosening roller is arranged in the gap and is configured to act on the tobacco leaves conveyed by the first conveying device, and the first material stirring roller is configured to act on the tobacco leaves conveyed by the second conveying device; the second material spreading device comprises a third conveying device and a second material stirring roller, the third conveying device is provided with a first conveying section and a second conveying section which are sequentially arranged in the conveying direction of the third conveying device, and the first conveying section is arranged below the interval to receive the tobacco leaves from the first conveying device; the second conveying section is arranged on the downstream of the second conveying device to receive the tobacco leaves from the second conveying device, and the second material stirring roller is configured to act on the tobacco leaves conveyed by the second conveying section. According to the tobacco leaf thinning device, the tobacco leaf thinning effect can be improved.

Description

Technical Field

[0001] The present invention relates to the field of tobacco leaf processing, and in particular to a tobacco leaf thinning device. Background Art

[0002] Leaf threshing and redrying is the first step in tobacco processing. Before large-scale screening, photoelectric impurity removal, tobacco leaf screening, and redrying, it is often necessary to thin the multiple layers of tobacco leaves, that is, to spread the original tobacco into a thin layer for material processing in subsequent processes. At present, multiple layers of tobacco leaves are usually thinned by a feed roller. However, when the conveying flow rate of tobacco leaves is large, this method has limited effect on thinning the tobacco leaves, and the tobacco leaves may roll back to the upstream side of the feed roller with the feed roller, causing the tobacco leaves to be entangled and broken. Utility Model Content

[0003] The purpose of the present disclosure is to provide a tobacco leaf thinning device to improve the thinning effect of tobacco leaves in the leaf threshing and re-roasting process.

[0004] A first aspect of the present disclosure provides a tobacco leaf thinning device, comprising:

[0005] a first conveying device;

[0006] at least one loose roller;

[0007] A first spreading device comprises a second conveying device and a first material-moving roller, wherein the first conveying device forms a gap with the second conveying device along its conveying direction, at least one loosening roller is arranged in the gap and is configured to act on the tobacco leaves conveyed by the first conveying device to make the tobacco leaves looser, and the first material-moving roller is configured to act on the tobacco leaves conveyed by the second conveying device to thin the tobacco leaves; and

[0008] The second material spreading device includes a third conveying device and a second material dispensing roller. The third conveying device has a first conveying section and a second conveying section arranged in sequence along its own conveying direction. The first conveying section is arranged below the interval to receive tobacco leaves from the first conveying device, and the second conveying section is arranged downstream of the second conveying device to receive tobacco leaves from the second conveying device. The second material dispensing roller is configured to act on the tobacco leaves conveyed by the second conveying section to spread the tobacco leaves thinly.

[0009] According to some embodiments of the present disclosure,

[0010] The first material-moving roller comprises a first roller body and a first material-moving pin, wherein the first material-moving pin is arranged at the periphery of the first roller body, and the distance between one end of the first material-moving pin away from the periphery of the first roller body and the axis of the first roller body is adjustable; and / or

[0011] The second material-moving roller comprises a second roller body and a second material-moving pin, wherein the second material-moving pin is arranged at the outer periphery of the second roller body, and the distance between one end of the second material-moving pin away from the outer periphery of the second roller body and the axis of the second roller body is adjustable.

[0012] According to some embodiments of the present disclosure,

[0013] A first screw hole is provided on the outer periphery of the first roller body, the first material-moving pin is matched and connected with the first screw hole, and the matching position in the first screw hole is adjustable; and / or

[0014] A second screw hole is arranged on the outer periphery of the second roller body, and the second material removing pin is matched and connected with the second screw hole and the matching position in the second screw hole is adjustable.

[0015] According to some embodiments of the present disclosure,

[0016] The first material-moving roller comprises a first nut, two of the first nuts are screwed onto the first material-moving pin and pressed side by side against the outer circumference of the first roller body; and / or

[0017] The second material-moving roller comprises a second nut, and two of the second nuts are screwed onto the second material-moving pins and pressed side by side against the outer circumference of the second roller body.

[0018] According to some embodiments of the present disclosure,

[0019] The first material-moving roller comprises a first roller body and a first material-moving pin, and the first material-moving pin is detachably connected to the first roller body; and / or

[0020] The second material-moving roller comprises a second roller body and a second material-moving pin, and the second material-moving pin is detachably connected to the second roller body.

[0021] According to some embodiments of the present disclosure, a conveying speed of the third conveying device is greater than a conveying speed of the second conveying device.

[0022] According to some embodiments of the present disclosure,

[0023] The second conveying device comprises a first conveying belt and a first rake portion protrudingly arranged on the surface of the first conveying belt, wherein the first rake portion is made of a flexible material; and / or

[0024] The third conveying device includes a second conveying belt and a second rake portion protrudingly arranged on the surface of the second conveying belt, and the second rake portion is made of a flexible material.

[0025] According to some embodiments of the present disclosure, a plurality of loosening rollers are disposed side by side and spaced apart from each other.

[0026] According to some embodiments of the present disclosure, the rotation speed of each loosening roller is adjustable.

[0027] According to some embodiments of the present disclosure, the loosening roller includes a third roller body and a third rake portion protrudingly disposed on the outer circumference of the third roller body, and the third rake portion is made of a flexible material.

[0028] According to some embodiments of the present disclosure,

[0029] The first material spreading device comprises a first adjusting frame, the first adjusting frame is mounted on the second conveying device, the first material dispensing roller is movably connected to the first adjusting frame along a direction perpendicular to a conveying surface of the second conveying device, so as to adjust the distance between the first material dispensing roller and the conveying surface of the second conveying device; and / or

[0030] The second material spreading device includes a second adjusting frame, which is installed on the third conveying device. The second material spreading roller is movably connected to the second adjusting frame along a direction perpendicular to the conveying surface of the third conveying device to adjust the distance between the second material spreading roller and the conveying surface of the third conveying device.

[0031] The working principle of the tobacco thinning device provided by the embodiment of the present disclosure is as follows: the tobacco leaves to be thinned are transported to at least one loose roller by the first conveying device. Under the action of the loose roller, the large clumps of tobacco leaves become looser, and a part of the relatively loose tobacco leaves forming a thin layer falls into the first conveying section of the third conveying device through the gap formed by the first conveying device and the second conveying device, and another part of the larger pieces of tobacco leaves enter the second conveying device. The first spreading device and the second spreading device form a two-stage tobacco thinning mechanism. In each stage of the tobacco thinning mechanism, when the tobacco leaves transported on the conveying device pass through the material-dispensing roller, the material-dispensing roller acts on the tobacco leaves and breaks up or knocks down the tobacco leaves layer by layer, thereby thinning the tobacco leaves and improving the uniformity of the material.

[0032] Since the tobacco leaves are diverted at the position of the loose roller, the load of the material roller in thinning the tobacco leaves in each level of the tobacco leaf thinning mechanism is small, and the tobacco leaf crushing rate is low. In addition, the tobacco leaves that have been initially thinned by the first material roller can be transported by the second conveying device to the second conveying section of the third conveying device, and further thinned by the second material roller until the thickness of the tobacco leaves reaches the target thickness. After two-stage thinning, the thinning effect and uniformity of the tobacco leaves can be further improved, which can meet the thinning requirements of very small target thickness.

[0033] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0035] Figure 1 It is a schematic diagram of the structure of a tobacco leaf thinning device according to some embodiments of the present disclosure.

[0036] Figure 2 It is a schematic structural diagram of the first material spreading device or the second material spreading device of some embodiments of the present disclosure.

[0037] Figure 3 It is a schematic structural diagram of the first material-dividing roller or the second material-dividing roller of some embodiments of the present disclosure.

[0038] In the accompanying drawings, each reference numeral represents:

[0039] 1. First conveying device; 2. First material spreading device; 21. Second conveying device; 211. First conveyor belt; 212. First material rake section; 22. First material dispensing roller; 221. First roller body; 222. First material dispensing pin; 23. First driving device; 24. First adjusting frame; 3. Second material spreading device; 31. Third conveying device; 301. First conveying section; 302. Second conveying section; 311. Second conveyor belt; 312. Second material rake section; 32. Second material dispensing roller; 321. Second roller body; 322. Second material dispensing pin; 33. Second driving device; 34. Second adjusting frame; 4. Loose roller; 41. Third roller body. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present disclosure. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, these technologies, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0042] In the description of the present disclosure, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0043] In the description of the present disclosure, it is necessary to understand that the orientation or positional relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words 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, and therefore cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0044] refer to Figures 1 to 3 Some embodiments of the present disclosure provide a tobacco leaf thinning device, comprising a first conveying device 1, at least one loosening roller 4, a first spreading device 2 and a second spreading device 3.

[0045] The first spreading device 2 includes a second conveying device 21 and a first material-spreading roller 22. The first conveying device 1 forms a gap with the second conveying device 21 along its own conveying direction. At least one loosening roller 4 is arranged in the gap and is configured to act on the tobacco leaves conveyed by the first conveying device 1 to make the tobacco leaves looser. The first material-spreading roller 22 is configured to act on the tobacco leaves conveyed by the second conveying device 21 to spread the tobacco leaves thinner.

[0046] The second spreading device 3 includes a third conveying device 31 and a second material-dispensing roller 32. The third conveying device 31 has a first conveying section 301 and a second conveying section 302 arranged in sequence along its own conveying direction. The first conveying section 301 is arranged below the interval to receive tobacco leaves from the first conveying device 1, and the second conveying section 302 is arranged downstream of the second conveying device 21 to receive tobacco leaves from the second conveying device 21. The second material-dispensing roller 32 is configured to act on the tobacco leaves conveyed by the second conveying section 302 to spread the tobacco leaves thinly.

[0047] Optionally, the tobacco leaf thinning device includes a loose roller 4, and the first conveying device 1, the loose roller 4 and the second conveying device 21 are sequentially arranged at intervals along the conveying direction of the first conveying device 1. Figure 1 The tobacco leaf thinning device includes a plurality of loose rollers 4 arranged side by side and spaced apart from each other. The first conveying device 1 , the plurality of loose rollers 4 and the second conveying device 21 are arranged in sequence and spaced apart from each other along the conveying direction of the first conveying device 1 .

[0048] Optionally, refer to Figure 1 The first conveying device 1 is arranged horizontally, the second conveying device 21 is arranged upwardly tilted from the upstream end to the downstream end in its own conveying direction to convey tobacco leaves from bottom to top, and the third conveying device 31 is arranged upwardly tilted from the upstream end to the downstream end in its own conveying direction to convey tobacco leaves from bottom to top. Optionally, refer to Figure 1 The third conveying device 31 has a first conveying section 301, a third conveying section 303 and a second conveying section 302 which are sequentially connected along its own conveying direction.

[0049] Optionally, refer to Figure 2 and Figure 3 The first material spreading device 2 includes a first driving device 23 drivingly connected to the first material-dispensing roller 22, and the first driving device 23 is configured to drive the first material-dispensing roller 22 to rotate around its own axis. Figure 2 and Figure 3 The second material spreading device 3 includes a second driving device 33 drivingly connected to the second material spreading roller 32, and the second driving device 33 is configured to drive the second material spreading roller 32 to rotate around its own axis.

[0050] The working principle of the tobacco thinning device provided by the embodiment of the present disclosure is as follows: the tobacco leaves to be thinned are conveyed to at least one loose roller 4 by the first conveying device 1. Under the action of the loose roller 4, the large group of tobacco leaves becomes looser, and a part of the relatively loose tobacco leaves forming a thin layer falls into the first conveying section 301 of the third conveying device 31 through the gap formed by the first conveying device 1 and the second conveying device 21, and another part of the larger pieces of tobacco leaves enter the second conveying device 21. The first spreading device 2 and the second spreading device 3 form a two-stage tobacco thinning mechanism. In each stage of the tobacco thinning mechanism, when the tobacco leaves conveyed on the conveying device pass through the material-dispensing roller, the material-dispensing roller acts on the tobacco leaves and breaks up or knocks down the tobacco leaves layer by layer, thereby thinning the tobacco leaves and improving the uniformity of the material.

[0051] Since the tobacco leaves are diverted at the position of the loose roller 4, the load of the material-dividing roller in thinning the tobacco leaves in each level of the tobacco leaf thinning mechanism is small, and the tobacco leaf crushing rate is low. In addition, the tobacco leaves that have been initially thinned by the first material-dividing roller 22 can be transported by the second conveying device 21 to the second conveying section 302 of the third conveying device 31, and further thinned under the action of the second material-dividing roller 32 until the thickness of the tobacco leaves reaches the target thickness. After two-stage thinning, the thinning effect and uniformity of the tobacco leaves can be further improved.

[0052] In the related art, the roller body of the feeding roller is equipped with feeding pins, but the feeding pins are usually fixedly connected to the roller body, and the length, number and position of the feeding pins are fixed, which makes it difficult to adapt to the thinning requirements of different materials, and is not conducive to the thinning and processing of tobacco leaves. In addition, the roller body of the feeding roller is long and heavy, which will cause bending deformation, resulting in the conveying device being closer to the middle area of ​​the roller body and farther from the two end areas of the roller body, reducing the efficiency of tobacco leaf thinning.

[0053] In order to improve the above-mentioned problems, the structure of the tobacco thinning device in some embodiments of the present disclosure is further described below.

[0054] In some embodiments, the first material-moving roller 22 includes a first roller body 221 and a first material-moving pin 222. The first material-moving pin 222 is arranged on the periphery of the first roller body 221, and the distance between one end of the first material-moving pin 222 away from the periphery of the first roller body 221 and the axis of the first roller body 221 is adjustable.

[0055] In the above embodiment, the distance between the end of the first material moving pin 222 away from the outer periphery of the first roller body 221 and the axis of the first roller body 221 can be adaptively adjusted according to the deformation degree of different positions of the first roller body 221, thereby reducing the adverse effects of the bending deformation of the first roller body 221 and improving the tobacco leaf thinning efficiency.

[0056] In some embodiments, the second material-moving roller 32 includes a second roller body 321 and a second material-moving pin 322. The second material-moving pin 322 is arranged on the outer periphery of the second roller body 321, and the distance between one end of the second material-moving pin 322 away from the outer periphery of the second roller body 321 and the axis of the second roller body 321 is adjustable.

[0057] In the above embodiment, the technical effect produced by the second material-digging roller 32 is similar to that of the above-mentioned first material-digging roller 22 having a similar structure.

[0058] In some embodiments, a first screw hole is disposed on the outer periphery of the first roller body 221 , and the first material-moving pin 222 is connected to the first screw hole in a mating manner and the mating position in the first screw hole is adjustable.

[0059] In the above embodiment, the first material-moving pin 222 is threadedly connected to the first roller body 221 through the first screw hole, which is convenient for disassembly. In addition, by adjusting the matching position of the first material-moving pin 222 and the first screw hole, the distance between the end of the first material-moving pin 222 away from the outer periphery of the first roller body 221 and the axis of the first roller body 221 can be adjusted.

[0060] In some embodiments, a second screw hole is disposed on the outer periphery of the second roller body 321 , and the second material-moving pin 322 is connected to the second screw hole in a mating manner and the mating position in the second screw hole is adjustable.

[0061] In the above embodiment, the second material-moving pin 322 is threadedly connected to the second roller body 321 through the second screw hole, and the technical effect produced is similar to that of the first material-moving roller 22 with a similar structure mentioned above.

[0062] In some embodiments, the first material-moving roller 22 includes first nuts, and two first nuts are screwed onto the first material-moving pins 222 and pressed side by side against the outer circumference of the first roller body 221 .

[0063] The two first nuts can form a double-nut anti-loosening structure, which can reduce the risk of the first material-moving pin 222 loosening or falling during the operation of the tobacco thinning device.

[0064] In some embodiments, the second material-moving roller 32 includes second nuts, and two second nuts are screwed onto the second material-moving pins 322 and pressed side by side against the outer circumference of the second roller body 321 .

[0065] The technical effect of the two second nuts is similar to that of the two first nuts.

[0066] In some embodiments, the first material-moving roller 22 includes a first roller body 221 and a first material-moving pin 222 , and the first material-moving pin 222 is detachably connected to the first roller body 221 .

[0067] In the above embodiment, the number and distribution density of the first material-moving pins 222 connected to the first roller body 221 can be adaptively adjusted according to the conveying flow rate of tobacco leaves on the first conveying device 1, which is beneficial to improving the tobacco leaf thinning efficiency.

[0068] In some embodiments, the second material-moving roller 32 includes a second roller body 321 and a second material-moving pin 322 , and the second material-moving pin 322 is detachably connected to the second roller body 321 .

[0069] The technical effect produced by the detachable second material-moving pin 322 is similar to the technical effect produced by the detachable first material-moving pin 222 .

[0070] In some embodiments, the conveying speed of the third conveying device 31 is greater than the conveying speed of the second conveying device 21 .

[0071] For example, if the second conveying device 21 and the third conveying device 31 are belt conveyors, the belt speed of the conveyor belt in the third conveying device 31 is greater than the belt speed of the conveyor belt in the second conveying device 21 .

[0072] In the above embodiment, the conveying speed of the third conveying device 31 is higher than the conveying speed of the second conveying device 21, which can further reduce the thickness of the tobacco leaves after being thinned by the two-stage tobacco thinning mechanism of the first spreading device 2 and the second spreading device 3. Even if the target thickness of the tobacco leaves is very small, it can meet the corresponding thinning requirements.

[0073] In some embodiments, the second conveying device 21 includes a first conveying belt 211 and a first rake portion 212 protrudingly disposed on the surface of the first conveying belt 211 , and the first rake portion 212 is made of a flexible material.

[0074] The flexible material mentioned above refers to a material that can produce macroscopic deformation under the action of the tobacco leaves being transported. For example, the first rake part 212 and the second rake part 312 can be made of plastic.

[0075] Considering that the first material-moving pin 222 on the first material-moving roller 22 is usually made of metal, in the above embodiment, the first material-raking part 212 made of flexible material can prevent the tobacco leaves from being subjected to excessive tearing force under the action of the first material-moving roller 22 and the second conveying device 21, thereby improving the tobacco leaf crushing phenomenon, reducing the tobacco leaf crushing rate, and improving the uniformity of the tobacco leaves after thinning.

[0076] In some embodiments, the third conveying device 31 includes a second conveying belt 311 and a second rake portion 312 protrudingly disposed on the surface of the second conveying belt 311 , and the second rake portion 312 is made of a flexible material.

[0077] The technical effect produced by the second rake portion 312 made of a flexible material is similar to the technical effect produced by the first rake portion 212 made of a flexible material.

[0078] In some embodiments, reference Figure 1 The tobacco leaf thinning device includes a plurality of loose rollers 4 arranged side by side and at intervals.

[0079] In the above embodiment, there are gaps between the first conveying device 1 and the loosening roller 4, between the second conveying device 21 and the loosening roller 4, and between adjacent loosening rollers 4. During the operation of the tobacco thinning device, the tobacco leaves conveyed by the first conveying device 1 become looser after passing through the loosening roller 4, and some thin layers of tobacco leaves can flow into the first conveying section 301 of the third conveying device 31 from the above-mentioned multiple gaps, thereby improving the tobacco leaf separation effect.

[0080] In some embodiments, the rotation speed of each loosening roller 4 is adjustable.

[0081] In the above embodiment, the rotation speed of each loose roller 4 can be specifically set according to the type of tobacco leaves and the need for tobacco leaf thinning, and the rotation speeds of different loose rollers 4 can be the same or different to obtain a better thinning effect. For example, along the conveying direction of the first conveying device 1, the rotation speed of each of the multiple loose rollers 4 increases in sequence.

[0082] In some embodiments, the loosening roller 4 includes a third roller body and a third rake portion protrudingly disposed on the outer circumference of the third roller body 41 , and the third rake portion is made of a flexible material.

[0083] The meaning of the flexible material may refer to the above related description. Optionally, the loose roller 4 comprises a Velcro wrapped around the circumferential surface of the third roller body 41, the Velcro has a hook surface, and the third rake portion is a hook-shaped portion on the hook surface of the Velcro.

[0084] In the above embodiment, the third rake portion is made of flexible material. When the loose roller 4 acts on the tobacco leaves, the third rake portion made of flexible material can prevent the tobacco leaves from being subjected to excessive tearing force under the action of the loose roller 4, which is beneficial to reducing the tobacco leaf crushing rate.

[0085] In some embodiments, the first material spreading device 2 includes a first adjusting frame 24, which is installed on the second conveying device 21, and the first material spreading roller 22 is movably connected to the first adjusting frame 24 along a direction perpendicular to the conveying surface of the second conveying device 21 to adjust the distance between the first material spreading roller 22 and the conveying surface of the second conveying device 21.

[0086] In the above embodiment, the distance between the first material-moving roller 22 and the conveying surface of the second conveying device 21 can be adjusted by providing the first adjusting frame 24, so as to adjust the expected thickness of the tobacco leaves after being spread.

[0087] In some embodiments, the second material spreading device 3 includes a second adjusting frame 34, which is installed on the third conveying device 31, and the second material spreading roller 32 is movably connected to the second adjusting frame 34 along a direction perpendicular to the conveying surface of the third conveying device 31 to adjust the distance between the second material spreading roller 32 and the conveying surface of the third conveying device 31.

[0088] The technical effect produced by the second adjustment frame 34 is similar to the technical effect produced by the first adjustment frame 24 .

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution for protection requested by the present disclosure.

Claims

1. A tobacco leaf thinning device, characterized in that: include: A first conveying device (1); at least one loosening roller (4); A first spreading device (2), comprising a second conveying device (21) and a first material-moving roller (22), wherein the first conveying device (1) forms a gap with the second conveying device (21) along its own conveying direction, at least one loosening roller (4) is arranged in the gap and is configured to act on the tobacco leaves conveyed by the first conveying device (1) to make the tobacco leaves looser, and the first material-moving roller (22) is configured to act on the tobacco leaves conveyed by the second conveying device (21) to spread the tobacco leaves thinner; and The second spreading device (3) comprises a third conveying device (31) and a second material-dispensing roller (32); the third conveying device (31) comprises a first conveying section (301) and a second conveying section (302) which are arranged in sequence along its own conveying direction; the first conveying section (301) is arranged below the interval to receive tobacco leaves from the first conveying device (1); the second conveying section (302) is arranged downstream of the second conveying device (21) to receive tobacco leaves from the second conveying device (21); the second material-dispensing roller (32) is configured to act on the tobacco leaves conveyed by the second conveying section (302) to spread the tobacco leaves thinly.

2. The tobacco leaf thinning device according to claim 1, characterized in that: The first material shifting roller (22) comprises a first roller body (221) and a first material shifting pin (222), wherein the first material shifting pin (222) is arranged on the outer periphery of the first roller body (221), and the distance between an end of the first material shifting pin (222) away from the outer periphery of the first roller body (221) and the axis of the first roller body (221) is adjustable; and / or The second material shifting roller (32) comprises a second roller body (321) and a second material shifting pin (322), wherein the second material shifting pin (322) is arranged on the outer periphery of the second roller body (321), and the distance between one end of the second material shifting pin (322) away from the outer periphery of the second roller body (321) and the axis of the second roller body (321) is adjustable.

3. The tobacco leaf thinning device according to claim 2, characterized in that: A first screw hole is provided on the outer periphery of the first roller body (221), and the first material-moving pin (222) is connected to the first screw hole in a matching manner and the matching position in the first screw hole is adjustable; and / or A second screw hole is arranged on the outer periphery of the second roller body (321), and the second material removing pin (322) is matched and connected with the second screw hole, and the matching position in the second screw hole is adjustable.

4. The tobacco leaf thinning device according to claim 3, characterized in that: The first material-moving roller (22) comprises a first nut, two of the first nuts are screwed onto the first material-moving pin (222) and are pressed side by side against the outer circumference of the first roller body (221); and / or The second material-moving roller (32) comprises a second nut, and two of the second nuts are screwed onto the second material-moving pin (322) and pressed side by side against the outer circumference of the second roller body (321).

5. The tobacco leaf thinning device according to claim 1, characterized in that: The first material shifting roller (22) comprises a first roller body (221) and a first material shifting pin (222), and the first material shifting pin (222) is detachably connected to the first roller body (221); and / or The second material shifting roller (32) comprises a second roller body (321) and a second material shifting pin (322), and the second material shifting pin (322) is detachably connected to the second roller body (321).

6. The tobacco leaf thinning device according to any one of claims 1 to 5, characterized in that: The conveying speed of the third conveying device (31) is greater than the conveying speed of the second conveying device (21).

7. The tobacco leaf thinning device according to any one of claims 1 to 5, characterized in that: The second conveying device (21) comprises a first conveying belt (211) and a first rake portion (212) protrudingly arranged on the surface of the first conveying belt (211), and the first rake portion (212) is made of a flexible material; and / or The third conveying device (31) comprises a second conveying belt (311) and a second rake portion (312) protrudingly arranged on the surface of the second conveying belt (311), and the second rake portion (312) is made of a flexible material.

8. The tobacco leaf thinning device according to any one of claims 1 to 5, characterized in that: It comprises a plurality of loose rollers (4) arranged side by side and at intervals.

9. The tobacco leaf thinning device according to claim 8, characterized in that: The rotation speed of each loosening roller (4) is adjustable.

10. The tobacco leaf thinning device according to any one of claims 1 to 5, characterized in that: The loosening roller (4) comprises a third roller body and a third raking portion protrudingly arranged on the outer periphery of the third roller body (41), and the third raking portion is made of a flexible material.

11. The tobacco leaf thinning device according to any one of claims 1 to 5, characterized in that: The first material spreading device (2) comprises a first adjusting frame (24), the first adjusting frame (24) is mounted on the second conveying device (21), the first material dispensing roller (22) is movably connected to the first adjusting frame (24) in a direction perpendicular to the conveying surface of the second conveying device (21), so as to adjust the distance between the first material dispensing roller (22) and the conveying surface of the second conveying device (21); and / or The second material spreading device (3) comprises a second adjusting frame (34), the second adjusting frame (34) is mounted on the third conveying device (31), and the second material dispensing roller (32) is movably connected to the second adjusting frame (34) in a direction perpendicular to the conveying surface of the third conveying device (31) so as to adjust the distance between the second material dispensing roller (32) and the conveying surface of the third conveying device (31).

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