A tobacco stem pretreatment system and method

Abstract

The application provides a tobacco stem pretreatment system and method, and belongs to the technical field of tobacco processing. The system comprises a cloth bag dust collector, a feeding conveyor belt, a light weight removing device, a throwing device, a pneumatic conveying device, a buffer cabinet, a stem crook removing machine, a feeding conveyor belt and a quantitative feeding device. The light weight removing device is arranged below the throwing device. The light weight removing device comprises a removing mechanism, a supporting seat, an inclination adjusting mechanism and a feeding mechanism. The removing mechanism comprises two side plates, and three first synchronous shafts arranged in a triangular shape are arranged between the two side plates. After a first driving motor is started, the first synchronous shaft can drive a transmission assembly, and the transmission assembly can drive the nylon cloth belt to rotate continuously. The rubber roller is in a static state, the nylon cloth belt is rubbed with the rubber roller and generates static electricity, so that the second type of light weight impurities can be attracted, thereby helping to remove the second type of light weight impurities mixed in the tobacco stem.

Description

Technical Field

[0001] This invention belongs to the field of tobacco processing technology, and more specifically, relates to a tobacco stem pretreatment system and method. Background Technology

[0002] The production of tobacco stems involves several steps, including tobacco stem pretreatment, stem storage, stem cutting, stem drying, and stem flavoring. Tobacco stem pretreatment, as the first step in tobacco stem production, involves feeding the raw tobacco stems into the production line and removing impurities and tobacco dust to improve the purity of the stems, ensure they meet process requirements, and enhance the quality of the processed tobacco stems.

[0003] The current tobacco stem pretreatment process is as follows: tobacco stem feeding → tobacco stem unpacking → removal of light impurities → quantitative feeding → tobacco stem packing → quantitative feeding → stem washing. Currently, the tobacco stem pretreatment process suffers from a poor on-site production environment due to the high dust content in the tobacco stems, particularly the poor removal of light impurities such as feathers and plastic sheets, as well as hemp fibers. This results in increased washing time and reduced production efficiency. Summary of the Invention

[0004] This invention provides a tobacco stem pretreatment system and method, which aims to solve the problem of poor removal of lightweight impurities such as feathers and plastic sheets, as well as hemp fibers, in existing tobacco stem pretreatment processes.

[0005] In view of the above problems, the technical solution proposed by the present invention is:

[0006] In a first aspect, the present invention provides a tobacco stem pretreatment system, comprising a bag filter, a feeding conveyor belt, a lightweight rejection device, a throwing device, a pneumatic conveying device, a buffer cabinet, a stem and stalk rejection machine, a feeding conveyor belt, and a quantitative feeding device, wherein the lightweight rejection device is disposed below the throwing device, and the lightweight rejection device comprises:

[0007] The rejection mechanism includes two side plates, and three first synchronous shafts arranged in a triangular shape are provided between the two side plates. Both ends of the three first synchronous shafts are connected to transmission components, and a nylon cloth belt is provided between the two transmission components. At least one rubber roller is provided above the nylon cloth belt. Each rubber roller is fixedly connected to the two side plates through a second synchronous shaft. A first drive motor is installed on one of the side plates, and the output end of the first drive motor is fixedly connected to one of its first synchronous shafts.

[0008] A support base and a tilt adjustment mechanism are provided, wherein the tilt adjustment mechanism is disposed between the support base and the rejection mechanism, and the tilt adjustment mechanism is used to adjust the tilt angle of the rejection mechanism;

[0009] A feeding mechanism is arranged in the conveying direction of the nylon cloth, and is used for secondary rejection and discharging to the air feeding device.

[0010] As a preferred technical solution of the present application, a pit is dug at the position where the feeding conveyor belt is close to the ground, so that the feeding conveyor belt is placed in the pit, and a feeding dust removal cover is arranged above the pit.

[0011] As a preferred technical solution of the present application, the transmission assembly comprises first rotating wheels, each of the first synchronous shafts is sleeved with the first rotating wheel, and the three rotating wheels are connected through a transmission toothed belt.

[0012] As a preferred technical solution of the present application, the nylon cloth belt has a cleaning surface, the cleaning surface is an inclined surface, the rejection mechanism further comprises a scraping assembly, the scraping assembly comprises two first rotating seats, a connecting plate is arranged between the two first rotating seats, the connecting plate is connected with the first rotating seat through a first rotating shaft, a wooden scraper is fixedly connected to the connecting plate, the wooden scraper is in contact with the cleaning surface, and the first rotating shaft is connected with the first rotating seat through a torsional spring.

[0013] As a preferred technical solution of the present application, the rejection mechanism further comprises a knocking assembly, the knocking assembly comprises a third synchronous shaft, a convex roller is arranged on the third synchronous shaft, the convex roller is in contact with the other side of the cleaning surface, a second driving motor is installed on one of the side plates, and an output end of the second driving motor is fixedly connected with the third synchronous shaft.

[0014] As a preferred technical solution of the present application, the rejection mechanism further comprises a first negative pressure air pipe, the first negative pressure air pipe is located below the cleaning surface, the first negative pressure air pipe is a vertical air duct penetrating through the inside, and the cross section of the first negative pressure air pipe opposite to the cleaning surface is an inclined surface.

[0015] As a preferred technical solution of the present application, the inclination adjusting mechanism comprises a base, the base is arranged on the supporting seat, a turnover plate is rotationally connected to the base, an execution assembly is arranged between the supporting seat and the turnover plate, the two first rotating seats are arranged on the turnover plate, and the first negative pressure air pipe is arranged on the base.

[0016] As a preferred technical solution of the present application, the execution assembly comprises a connecting arm, a connecting rod is hinged to one end of the connecting arm, a reducer and a third driving motor are respectively arranged on the supporting seat, an output end of the reducer is fixedly connected with the connecting rod, and an input end of the reducer is fixedly connected with an output end of the third driving motor.

[0017] As a preferred technical scheme of the present application, the feeding mechanism comprises a support frame, a receiving hopper is arranged in the support frame, and the receiving hopper is communicated with the second negative pressure air pipe.

[0018] In a second aspect, the present application provides a tobacco stem pretreatment method, comprising the following steps:

[0019] S1, the tobacco stems are manually unpacked and fed into a pit and then enter a feeding conveyor belt;

[0020] S2, after the tobacco stems are uniformly fed by the feeding conveyor belt, the tobacco stems enter a throwing device to remove the first type of light impurities;

[0021] S3, then, the tobacco stems enter a light impurity removing device to remove the second type of light impurities, and finally the tobacco stems are fed by the air feeding device to enter a buffer cabinet for buffering;

[0022] S4, after the tobacco stems are discharged from the buffer cabinet, the tobacco stems enter a stem crook removing machine for stem crook screening;

[0023] S5, then the tobacco stems are conveyed by a feeding conveyor belt to a quantitative feeding device for quantitative feeding to enter a stem washing process for stem washing.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] (1) After the first driving motor is started, the first synchronous shaft can drive the transmission assembly, and the transmission assembly can drive the nylon cloth belt to continuously rotate. The rubber roller is in a stationary state, the nylon cloth belt rubs against the rubber roller and generates static electricity, thereby attracting the second type of light impurities, thereby helping to filter out the second type of light impurities mixed in the tobacco stems.

[0026] (2) By adjusting the inclination angle of the removing mechanism through the inclination adjusting mechanism, the uniform flow of the tobacco stems can be ensured, and the second type of light impurities can be better removed.

[0027] (3) When the feeding mechanism falls into the receiving hopper in the removing mechanism, the second type of light impurities is scattered into the receiving hopper, and the second negative pressure air pipe can further absorb the second type of light impurities, thereby greatly reducing the content of the second type of light impurities in the tobacco stems and indirectly improving the efficiency of the stem washing.

[0028] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1is a structural schematic view of a tobacco stem pretreatment system disclosed by the present application;

[0030] Figure 2 is a perspective view of a feeding conveyor belt of a tobacco stem pretreatment system disclosed by the present application;

[0031] Figure 3 is Figure 1 is a local enlarged view at A in FIG. 4;

[0032] Figure 4 is a perspective view of a light weight removing device of a tobacco stem pretreatment system disclosed by the present application;

[0033] Figure 5 is a structural schematic view of a removing mechanism of a tobacco stem pretreatment system disclosed by the present application;

[0034] Figure 6 is a structural schematic view of an inclination adjusting mechanism of a tobacco stem pretreatment system disclosed by the present application;

[0035] Figure 7 is a structural schematic view of a scraping assembly of a tobacco stem pretreatment system disclosed by the present application;

[0036] Figure 8 is a structural schematic view of a knocking assembly of a tobacco stem pretreatment system disclosed by the present application;

[0037] Figure 9 is a sectional view of a first negative pressure air pipe of a tobacco stem pretreatment system disclosed by the present application;

[0038] Figure 10 is a structural schematic view of a feeding mechanism of a tobacco stem pretreatment system disclosed by the present application;

[0039] Figure 11 is a sectional view of a material throwing device of a tobacco stem pretreatment system disclosed by the present application;

[0040] Figure 12 is a flow chart of a tobacco stem pretreatment method disclosed by the present application.

[0041] Explanation of reference signs: 1, cloth bag dust collector; 1a, feeding dust cover; 2, feeding conveyor belt; 2a, pit; 3, light weight removing device; 31, removing mechanism; 311, side plate; 312, first synchronous shaft; 3121, supporting roller; 313, transmission assembly; 3131, first rotating wheel; 3132, transmission toothed belt; 314, nylon cloth belt; 3141, cleaning surface; 315, rubber roller; 3151, second synchronous shaft; 316, first driving motor; 317, scraping assembly; 3171, first rotating seat; 3172, connecting plate; 3173, first rotating shaft; 3174, wooden scraping plate; 318, knocking assembly; 3181, third synchronous shaft; 3182, convex roller; 3183, second driving motor; 319, first negative pressure air pipe; 3191, vertical air duct; 32, supporting seat; 33, inclination adjusting mechanism; 331, base; 3311, bearing seat; 3312, second rotating shaft; 332, overturning plate; 3321, second rotating seat; 3322, third rotating seat; 3323, connecting shaft; 333, executing assembly; 3331, connecting arm; 3332, connecting rod; 3333, speed reducer; 3334, third driving motor; 34, feeding mechanism; 341, supporting frame; 342, receiving hopper; 343, second negative pressure air pipe; 4, material throwing device; 41, first air duct; 42, curved section; 43, feeding hopper; 5, air conveying device; 6, buffer cabinet; 7, stem knock removing machine. DETAILED DESCRIPTION

[0042] For the purposes of the present application, the technical solutions and advantages of the embodiments of the present application will be more apparent, the technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] It should be noted that: similar reference signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0047] Embodiment

[0048] Referring to the drawings Figures 1-11 As shown in the drawings, the present application provides a technical solution: a tobacco stem pretreatment system, comprising a bag-type dust collector 1, a feeding conveyor belt 2, a light removal device 3, a throwing device 4, a pneumatic conveying device 5, a buffer cabinet 6, a stem elbow removal machine 7, a feeding conveyor belt and a quantitative feeding device. The tobacco stems are screened through different processes, which not only ensures the production environment, but also ensures the cleanliness of the tobacco stems, so that the tobacco stems can be cleaned more quickly. Thus, the quality of the tobacco stems can be ensured, and the processing efficiency of the tobacco stems can be improved.

[0049] In this embodiment, the bag-type dust collector 1, the feeding conveyor belt 2, the pneumatic conveying device 5, the buffer cabinet 6, the stem elbow removal machine 7, the feeding conveyor belt and the quantitative feeding device are all existing devices, therefore, the present application will not be described in detail.

[0050] Specifically, in the CN216225425U number announced on April 8, 2022, the structural features and principles of the stem elbow removal machine 7 are specifically disclosed, therefore, will not be described in detail here.

[0051] In an optional embodiment, a pit 2a is dug at the position where the feeding conveyor belt 2 approaches the ground, so that the feeding conveyor belt 2 is placed in the pit 2a, and an upper dust removal cover 1a is arranged above the pit 2a. Before feeding, since the hemp rope on the stem package has been removed, the hemp rope can be prevented from entering the next process, which is beneficial to ensure the quality of the tobacco stems. At the same time, the upper dust removal cover 1a is connected with the bag-type dust collector 1, so that the upper dust removal cover 1a can suck and discharge the dust generated during feeding, reducing the dust in the tobacco stems and protecting the production environment.

[0052] Specifically, refer to the accompanying drawings Figure 1 and 3 As shown in FIGS. 1-8, the lightweight removing device 3 is arranged below the throwing device 4, and the lightweight removing device 3 comprises a removing mechanism 31, a supporting seat 32, an inclination adjusting mechanism 33 and a feeding mechanism 34.

[0053] In the embodiment of the present application, the removing mechanism 31 comprises two side plates 311, and three first synchronous shafts 312 arranged in a triangular shape are arranged between the two side plates 311. The two ends of the three first synchronous shafts 312 are connected with a transmission assembly 313, and a nylon cloth belt 314 is arranged between the two transmission assemblies 313. At least one rubber roller 315 is arranged above the nylon cloth belt 314, and each Rubber roller 315 is fixedly connected with the two side plates 311 through a second synchronous shaft 3151, and a first driving motor 316 is arranged on one side plate 311. The output end of the first driving motor 316 is fixedly connected with one first synchronous shaft 312.

[0054] For example, after the first driving motor 316 is started, the first synchronous shaft 312 can drive the transmission assembly 313, and the transmission assembly 313 can drive the nylon cloth belt 314 to rotate continuously. The rubber roller 315 is in a static state, the nylon cloth belt 314 generates friction with the rubber roller 315 and produces static electricity, thereby attracting the second type of lightweight impurities, so as to help filtering the second type of lightweight impurities mixed in the tobacco stems.

[0055] In an optional embodiment, a supporting roller 3121 is arranged on the surface of each first synchronous shaft 312. The supporting roller 3121 supports the nylon cloth belt 314, so as to avoid the middle part of the nylon cloth belt 314 from collapsing.

[0056] In an optional embodiment, the transmission assembly 313 comprises a first rotating wheel 3131, and the first rotating wheel 3131 is sleeved on each first synchronous shaft 312. The three rotating wheels are drivingly connected through a transmission toothed belt 3132, and the nylon cloth belt 314 is detachably connected with the transmission toothed belt 3132. By means of the transmission toothed belt 3132, the first rotating wheel 3131 can rotate around the first synchronous shaft 312 as the axis, and simultaneously, the transmission toothed belt 3132 can drive the nylon cloth belt 314 to rotate, so that the nylon cloth belt 314 can not only adsorb the second type of lightweight impurities, but also feed the tobacco stems into the feeding mechanism 34.

[0057] In addition, the transmission assembly 313 can also be composed of a gear and a chain, and the nylon cloth belt 314 can be detachably connected with the nylon cloth belt 314 through a connecting piece, so as to also realize the rotation of the nylon cloth belt 314.

[0058] In an optional embodiment, the nylon cloth belt 314 has a cleaning surface 3141 which is an inclined surface, and the removing mechanism 31 further comprises a scraping assembly 317, which comprises two first rotating seats 3171, a connecting plate 3172 being arranged between the two first rotating seats 3171, the connecting plate 3172 being connected with the first rotating seats 3171 through a first rotating shaft 3173, a wooden scraping plate 3174 being fixedly connected on the connecting plate 3172, the wooden scraping plate 3174 being in contact with the cleaning surface 3141, and the first rotating shaft 3173 being connected with the first rotating seats 3171 through a torsion spring. Through the continuous rotation of the nylon cloth belt 314, the wooden scraping plate 3174 can scrape the second type of light impurities, so as to avoid the second type of light impurities from being continuously adsorbed on the nylon cloth belt 314. Meanwhile, under the action of the torsion spring, the wooden scraping plate 3174 can still be in contact with the cleaning surface 3141 when the removing mechanism 31 is adjusted in the inclined angle.

[0059] In an optional embodiment, the removing mechanism 31 further comprises a knocking assembly 318, which comprises a third synchronous shaft 3181, a convex roller 3182 being arranged on the third synchronous shaft 3181, the convex roller 3182 being in contact with the other side of the cleaning surface 3141, a second driving motor 3183 being installed on the one side plate 311, and an output end of the second driving motor 3183 being fixedly connected with the third synchronous shaft 3181. After the second driving motor 3183 is started, the third synchronous shaft 3181 and the convex roller 3182 are driven to rotate, and through the continuous knocking of the convex roller 3182 on the nylon cloth belt 314, the second type of light impurities can be dropped.

[0060] In an optional embodiment, the removing mechanism 31 further comprises a first negative pressure air pipe 319, the first negative pressure air pipe 319 being located below the cleaning surface 3141, a vertical air duct 3191 being arranged in the first negative pressure air pipe 319, and a section of the first negative pressure air pipe 319 opposite to the cleaning surface 3141 being an inclined surface. The first negative pressure air pipe 319 can be connected with the cloth bag type dust collector 1. Through the cooperation of the knocking assembly 318 and the scraping assembly 317, the first negative pressure air pipe 319 can absorb and remove the second type of light impurities, so as to achieve the purpose of removing the second type of light impurities.

[0061] In an optional embodiment, the inclined adjusting mechanism 33 is arranged between the supporting seat 32 and the removing mechanism 31, and the inclined adjusting mechanism 33 is used for adjusting the inclined angle of the removing mechanism 31.

[0062] In an optional implementation, the tilting adjusting mechanism 33 comprises a base 331 provided on the support base 32, a turnover plate 332 rotationally connected to the base 331, an execution assembly 333 provided between the support base 32 and the turnover plate 332, two first rotary seats 3171 each provided on the turnover plate 332, and the first negative pressure air pipe 319 provided on the base 331. The turnover plate 332 can realize the overturning movement in the up-down direction through the transmission of the execution assembly 333 to the turnover plate 332.

[0063] In an optional implementation, the overturning angle of the turnover plate 332 ranges from 0 to 30°. Thus, the uniform flow of the tobacco stems can be ensured, and the second type of light-weight impurities can be better removed. Further, the overturning angle of the turnover plate 332 preferably ranges from 10° to 20°.

[0064] In an optional implementation, the base 331 is provided with two bearing seats 3311, a second rotating shaft 3312 is provided between the two bearing seats 3311, and two second rotary seats 3321 are further provided on the second rotating shaft 3312 and fixedly connected to the turnover seat. The second rotating shaft 3312 is fixedly connected to the second rotary seat 3321, and when the turnover shaft rotates, the second rotating shaft 3312 can rotate around the bearing seat 3311 as the axis, thereby realizing the rotary movement of the turnover plate 332.

[0065] In an optional implementation, the execution assembly 333 comprises a connecting arm 3331, a connecting rod 3332 hinged to one end of the connecting arm 3331, a reducer 3333 and a third driving motor 3334 respectively provided on the support base 32, the output end of the reducer 3333 fixedly connected to the connecting rod 3332, and the input end of the reducer 3333 fixedly connected to the output end of the third driving motor 3334. The third driving motor 3334 transmits to the reducer 3333, and the output end of the reducer 3333 can drive the connecting rod 3332 to perform the overturning movement, thereby enabling the connecting arm 3331 to drive the turnover plate 332 to perform the overturning movement.

[0066] In an optional implementation, the turnover plate 332 is further fixedly connected with two third rotary seats 3322, a connecting shaft 3323 is fixedly connected between the two third rotary seats 3322, and the connecting arm 3331 is rotationally connected to the connecting shaft 3323. When the connecting arm 3331 moves upward or downward, the connecting arm 3331 can rotate around the axis of the connecting shaft 3323, thereby changing the included angle between the connecting rod 3332 and the connecting arm 3331, and achieving the effect of adjusting the included angle between the turnover plate 332 and the base 331.

[0067] In an optional implementation, the feeding mechanism 34 is provided in the conveying direction of the nylon cloth, for secondary removal and discharging to the air feeding device 5.

[0068] In an alternative embodiment, the feeding mechanism 34 comprises a support frame 341, and a receiving hopper 342 is arranged in the support frame 341, and a second negative pressure air pipe 343 is connected to the receiving hopper 342. A filter screen is arranged in the second negative pressure air pipe 343, and the diameter of the mesh of the filter screen is smaller than the average length of the tobacco stems. The second negative pressure air pipe 343 is connected to the bag-type dust collector 1. Since the second type of light impurities may exist in the tobacco stems, when the removing mechanism 31 drops the tobacco stems into the receiving hopper 342, the second type of light impurities is scattered into the receiving hopper 342, and the second negative pressure air pipe 343 can further absorb the second type of light impurities.

[0069] In an alternative embodiment, the throwing device 4 comprises a first air duct 41, and a curved section 42 is arranged in the first air duct 41, and a feeding hopper 43 is arranged on one side of the first air duct 41 relative to the feeding conveyor belt 2. After the tobacco stems are removed from the feeding conveyor belt 2, the tobacco stems reach the feeding hopper 43 and the curved section 42, and the remaining tow can be scattered in the air, and the first air duct 41 is connected to the bag-type dust collector 1, so that the tow can be further absorbed.

[0070] The first type of light impurities is tow and the like, and the second type of light impurities is feather and plastic paper and the like.

[0071] Referring to FIG. 1, Figure 12 The tobacco stem pretreatment method provided by the embodiment of the present application comprises the following steps:

[0072] S1, the tobacco stems are manually unpacked and dropped into the pit 2a and then enter the feeding conveyor belt 2;

[0073] S2, after the tobacco stems are evenly dropped by the feeding conveyor belt 2, the tobacco stems enter the throwing device 4 to remove the first type of light impurities;

[0074] S3, then, the tobacco stems enter the light impurity removing device to remove the second type of light impurities, and finally the tobacco stems are sent by the air feeding device 5 to enter the buffer cabinet 6 for buffering;

[0075] S4, after the tobacco stems are discharged from the buffer cabinet 6, the tobacco stems enter the stem crook removing machine 7 for stem crook screening;

[0076] S5, then, the tobacco stems are conveyed by the feeding conveyor belt to the quantitative feeding device for quantitative feeding to enter the stem washing process for stem washing.

[0077] It should be noted that the model specifications of the first driving motor 316, the second driving motor 3183 and the third driving motor 3334 need to be determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0078] The power supply and principle of the first driving motor 316, the second driving motor 3183 and the third driving motor 3334 are clear to those skilled in the art, and will not be described in detail here.

[0079] The above merely provides the preferred embodiments of the present application, but not for limiting the present application. For those skilled in the art, the present application can have various modifications and changes. Any modified, equivalent replaced, improved and the like within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tobacco stem pretreatment system comprising a bag-type dust collector, a feeding conveyor, a light weight removing device, a throwing device, a pneumatic conveying device, a buffer cabinet, a stem crook removing machine, a feeding conveyor and a quantitative feeding device, characterized in that, The light removing device is arranged below the throwing device, and the light removing device comprises: The removing mechanism comprises two side plates, three first synchronous shafts arranged in a triangular shape between the two side plates, transmission assemblies connected to both ends of the three first synchronous shafts, a nylon cloth belt arranged between the two transmission assemblies, at least one rubber roller arranged above the nylon cloth belt, and a second synchronous shaft fixedly connected between each rubber roller and the two side plates. One of the side plates is provided with a first driving motor, and an output end of the first driving motor is fixedly connected to one of the first synchronous shafts. A support seat and an inclination adjusting mechanism are arranged between the support seat and the removing mechanism, and the inclination adjusting mechanism is used for adjusting the inclination angle of the removing mechanism. A feeding mechanism is arranged in the conveying direction of the nylon cloth belt, and is used for secondary removing and discharging to the air feeding device. The feeding mechanism comprises a support frame, a receiving hopper arranged in the support frame, and a second negative pressure air pipe communicated with the receiving hopper and connected to the bag-type dust collector. The throwing device comprises a first air duct, and the first air duct has a curved section. A feeding hopper is arranged on one side of the first air duct relative to the feeding conveying belt. After the tobacco stems pass through the feeding conveying belt to remove the tow, the tobacco stems reach the feeding hopper and the curved section. The first air duct is connected to the bag-type dust collector, so that the tow can be further absorbed.

2. The tobacco stem pretreatment system of claim 1, wherein, A pit is dug at the position where the feeding conveying belt is close to the ground, so that the feeding conveying belt is arranged in the pit. An upper dust removal cover is arranged above the pit.

3. The tobacco stem pretreatment system of claim 1, wherein, The transmission assembly comprises a first rotating wheel, the first rotating wheel is sleeved on each first synchronous shaft, three first rotating wheels are connected through a transmission toothed belt, and the nylon cloth belt is detachably connected with the transmission toothed belt.

4. The tobacco stem pretreatment system of claim 1, wherein, The nylon cloth belt has a cleaning surface, the cleaning surface is an inclined surface, the removing mechanism further comprises a scraping assembly, the scraping assembly comprises two first rotating seats, a connecting plate is arranged between the two first rotating seats, the connecting plate is connected with the first rotating seat through a first rotating shaft, a wooden scraping plate is fixedly connected to the connecting plate, the wooden scraping plate is in contact with the cleaning surface, and the first rotating shaft is connected with the first rotating seat through a torsional spring.

5. The tobacco stem pretreatment system of claim 4, wherein, The removing mechanism further comprises a knocking assembly, the knocking assembly comprises a third synchronous shaft, a convex roller is arranged on the third synchronous shaft, the convex roller is in contact with the opposite side of the cleaning surface of the nylon cloth belt, one of the side plates is provided with a second driving motor, and an output end of the second driving motor is fixedly connected to the third synchronous shaft.

6. The tobacco stem pretreatment system of claim 5, wherein, The removing mechanism further comprises a first negative pressure air pipe, the first negative pressure air pipe is located below the cleaning surface, the first negative pressure air pipe is a vertical air duct, and a cross section of the first negative pressure air pipe opposite to the cleaning surface is an inclined surface.

7. A tobacco stem pretreatment system according to claim 6, wherein, The tilting adjusting mechanism comprises a base arranged on the support seat, a turnover plate rotatably connected to the base, an execution assembly arranged between the support seat and the turnover plate, and two first rotary seats arranged on the turnover plate, and the first negative pressure air pipe is arranged on the base.

8. The tobacco stem pretreatment system of claim 7, wherein, The execution assembly comprises a connecting arm, one end of the connecting arm is hingedly connected with a connecting rod, a reducer and a third driving motor are respectively arranged on the support seat, the output end of the reducer is fixedly connected with the connecting rod, and the input end of the reducer is fixedly connected with the output end of the third driving motor.

9. A method for pre-treating tobacco stems, applied to the tobacco stem pre-treating system of claim 2, characterized in that, The method comprises the following steps: S1, the tobacco stems are manually unpacked and fed into a pit and then enter a feeding conveyor belt; S2, after the tobacco stems are uniformly fed by the feeding conveyor belt, the first type of light impurities are removed by a throwing device; S3, then, the tobacco stems enter a light impurity removing device to remove the second type of light impurities, and finally the tobacco stems are sent by a wind sending device to enter a buffer cabinet for buffering; S4, after the tobacco stems are discharged from the buffer cabinet, they enter a stem crook removing machine for stem crook screening; S5, then, the tobacco stems are conveyed to a quantitative feeding device by a feeding conveyor belt for quantitative feeding to enter a stem washing process for stem washing.

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