Tobacco stem screening device

Abstract

The present invention relates to a tobacco stem screening device, comprising: a first transmission mechanism, the first transmission mechanism is used to transmit tobacco stems along a first straight line direction; a first screening mechanism for preliminary screening of tobacco stems, the first screening mechanism is arranged at the transmission end of the first transmission mechanism, so that the tobacco stems on the first transmission mechanism are sent into the first screening mechanism; a sampling mechanism for receiving preliminary screened tobacco stems, the sampling mechanism is arranged directly below the first screening mechanism; and a second transmission mechanism for transmitting tobacco stems in the sampling mechanism, the second transmission mechanism is arranged directly below the sampling mechanism, a fine screening station is arranged on the second transmission mechanism, and a second screening component is arranged on the fine screening station, and the second screening component is used for secondary screening of tobacco stems in the sampling mechanism. The tobacco stem screening device is convenient for automatically screening tobacco stems, improves screening efficiency, reduces the labor intensity of manual work, and reduces labor costs.

Description

Technical Field

[0001] The invention relates to the field of tobacco production, and in particular to a tobacco stem screening device. Background Art

[0002] In the field of tobacco production, tobacco is produced into shredded tobacco in the drying process. It is inevitable that there are tobacco stems that do not meet the requirements of the rolling process during the drying process. Tobacco stems are toothpick-shaped stems formed by tobacco that has not expanded or has a poor expansion effect. In order to ensure the quality of subsequent production, the tobacco stems need to be sorted and removed from the shredded tobacco after the drying process. The removed tobacco stems can be reprocessed into shredded tobacco that meets the requirements of the rolling process through secondary processing. However, the cleanliness of different batches of tobacco is different. When tobacco is sorted during drying, metal, plastic, rubber and other debris may be present in the removed tobacco stems, resulting in a decrease in the tobacco content in the tobacco stems.

[0003] Currently, the method of removing debris from tobacco stems is usually to manually pick out the debris. The workers who remove the debris need to remain vigilant to remove the debris completely, which will increase the labor intensity and labor costs.

[0004] On the other hand, at present, inspectors also need to sample and measure the tobacco stems. If the content of impurities in the tobacco stems is too large, the impurities are difficult to remove fully, and the cost of picking impurities is high, the cost required for the secondary use of the tobacco stems will be greater than the cost of the tobacco shreds in the tobacco stems, then picking impurities from such tobacco stems will result in high costs, and the preferred method should be to directly discard such tobacco stems. The content of tobacco shreds in the tobacco stems can be judged by detecting the weight of the tobacco stems discharged per unit time. Specifically, since the weight of impurities such as metal, plastic, and rubber is much greater than the weight of tobacco, when the content of impurities in the tobacco stems is too large, it is bound to cause the weight of such tobacco stems to be larger. According to the cost, the tobacco shreds in the tobacco stems are within the standard range, that is, within this standard range, the cost of tobacco shreds in the tobacco stems is greater than the cost required for the secondary use of the tobacco stems, and the tobacco stems need to be reused. At present, inspectors need to manually time and sample and weigh, but this method is difficult to accurately control the sampling time. At this time, the accuracy of the data measured by the weighing is poor, and it is easy for inspectors to misjudge the treatment method of the tobacco stems, resulting in high processing costs or waste of tobacco shreds in the tobacco stems. Summary of the invention

[0005] Based on this, it is necessary to provide a tobacco stem screening device to address the problem of high labor costs for removing tobacco stems.

[0006] The present application provides a tobacco stem screening device, comprising:

[0007] a first conveying mechanism, the first conveying mechanism being used to convey tobacco stems along a first straight line direction;

[0008] A first screening mechanism for preliminary screening of tobacco stems, the first screening mechanism being arranged at the transmission end of the first transmission mechanism so that the tobacco stems on the first transmission mechanism are delivered into the first screening mechanism;

[0009] A sampling mechanism for receiving the preliminarily screened tobacco stems, the sampling mechanism being arranged directly below the first screening mechanism; and

[0010] The second conveying mechanism is used for conveying the tobacco stems in the sampling mechanism. The second conveying mechanism is arranged directly below the sampling mechanism. The second conveying mechanism is provided with a fine screening station. The fine screening station is provided with a second screening component. The second screening component is used for secondary screening of the tobacco stems in the sampling mechanism.

[0011] In the tobacco stem screening device provided in the embodiment of the present application, the tobacco stems are sent to the first screening mechanism through the first transmission mechanism for preliminary screening, and the preliminary screened tobacco stems are screened again through the second screening component, so that the tobacco stems are automatically screened, reducing the labor intensity of manual work, reducing labor costs, facilitating the removal of debris in the tobacco stems, and increasing the tobacco content in the tobacco stems. On the other hand, by setting a sampling mechanism on the moving path of the preliminary screened tobacco stems, automatic sampling is convenient in the sampling mechanism to improve the accuracy of the data measured by weighing.

[0012] In one embodiment, the first screening mechanism includes a first screening component and a vibration component, and the vibration component drives the first screening component to reciprocate along a second linear direction perpendicular to the first linear direction.

[0013] In one embodiment, the first screening mechanism further comprises a box, and the first screening assembly is mounted on the box;

[0014] The vibration assembly includes a trigger plate and a driver, the trigger plate is provided with a cam, and the first screening assembly is provided with a ball in contact with the cam;

[0015] An elastic reset element is arranged between the first screening component and the box body, and the driver drives the trigger disk to rotate, so that the cam intermittently pushes the first screening component to move along the second straight line direction.

[0016] In one embodiment, the first screening assembly includes a first motor and a screening element, and the first motor drives the screening element to reciprocate;

[0017] The screening element comprises a rotating shaft and a first screen arranged on the rotating shaft along a second straight line direction, and the rotating shaft is mounted on the box body;

[0018] The sphere is arranged at one end of the rotating shaft, and the resetting element is installed on the other end of the rotating shaft.

[0019] In one embodiment, the cam is circumferentially arranged on the trigger disk, so that the cam forms a wave-shaped protrusion structure on the outer circumference of the trigger disk.

[0020] In one embodiment, the sampling mechanism includes a material receiving box and an opening and closing assembly. The material receiving box is hollow inside and has openings on the upper and lower surfaces. Valves are installed on the two openings accordingly. The opening and closing assembly is used to control the opening and closing of the two valves.

[0021] In one embodiment, the opening and closing assembly includes a second motor, two door opening parts and a dislocation part, and the two door opening parts are connected to the valve in a one-to-one corresponding manner;

[0022] The second motor is transmission-connected with the two door opening parts through the offset part, so that the two valves are opened and closed at staggered times.

[0023] In one embodiment, the dislocation portion includes a transmission shaft and a trigger unit, and the second motor drives the trigger unit to drive the transmission shaft; the transmission shaft includes a first transmission shaft and a second transmission shaft, and the first transmission shaft and the second transmission shaft are connected by a second torsion spring to form the transmission shaft;

[0024] The door opening part includes a first door opening part and a second door opening part, the trigger unit is installed on the first transmission shaft, and the second transmission shaft is transmission-connected with the second door opening part;

[0025] The opening and closing assembly also includes a driving part. The second motor drives the transmission shaft to rotate. The trigger unit pushes the driving part, and the driving part drives the first door opening part to open and close.

[0026] In one embodiment, the transmission shaft further includes a third transmission shaft, and the second transmission shaft and the third transmission shaft are transmission-connected via a first belt transmission unit;

[0027] The dislocation part includes a transmission tooth, and the transmission tooth is transmission-connected with the third transmission shaft through a second belt transmission unit;

[0028] The trigger unit comprises a toothless block and a pushing block, the toothless block is fixedly connected to the pushing block, the toothless block is intermittently meshed with the transmission teeth, and the pushing block intermittently pushes the driving part.

[0029] In one embodiment, the driving part includes a sliding frame and a stop unit, and the sliding frame and the stop unit are slidably connected;

[0030] A rack is provided on the surface of the sliding frame, the first door opening part is meshed with the rack through a driving tooth, and the sliding frame drives the first door opening part. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the three-dimensional structure of a tobacco stem screening device provided in one embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the three-dimensional structure of a first transmission mechanism and a first screening mechanism provided by an embodiment of the present invention at a first viewing angle;

[0033] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0034] Figure 4 A schematic diagram of the three-dimensional structure of a first transmission mechanism and a first screening mechanism provided by an embodiment of the present invention at a second viewing angle;

[0035] Figure 5 A schematic diagram of the three-dimensional structure of a trigger disk provided in one embodiment of the present invention;

[0036] Figure 6 A schematic diagram of the three-dimensional structure of a sampling mechanism provided by an embodiment of the present invention at a first viewing angle;

[0037] Figure 7 A schematic diagram of the three-dimensional structure of a sampling mechanism provided by an embodiment of the present invention at a second viewing angle;

[0038] Figure 8 A schematic diagram of the three-dimensional structure of an opening and closing assembly provided in one embodiment of the present invention;

[0039] Fig. 9 for Figure 8 A partial enlarged schematic diagram of point B in the middle;

[0040] Fig.10 A schematic diagram of a portion of the structure of an opening and closing assembly provided in one embodiment of the present invention;

[0041] Fig.11 A schematic diagram of the three-dimensional structure of a second transmission mechanism provided in one embodiment of the present invention;

[0042] Fig.12 A schematic diagram of the three-dimensional structure of a second screening component provided in one embodiment of the present invention.

[0043] Reference numerals:

[0044] 100. A first transmission mechanism;

[0045] 11. Bracket; 12. Conveyor belt; 13. Transmission end;

[0046] 200, first screening mechanism;

[0047] 21. Box body; 22. First screening component; 23. Vibration component;

[0048] 221, first motor; 222, transmission wheel; 223, screening element; 224, mounting frame; 225, reset element;

[0049] 2231, rotating shaft; 2232, sphere; 2233, first screen;

[0050] 231, belt transmission unit; 232, trigger disk;

[0051] 2321, cam; 2322, rotating wheel;

[0052] 300. Sampling agency;

[0053] 31. Material receiving box; 32. Support seat; 33. Opening and closing assembly; 34. First valve; 35. Second valve;

[0054] 331, second motor; 332, driving part; 333, driven part; 334, first door opening part; 335, offset part; 336, second door opening part;

[0055] 3321, sliding frame; 3322, stop unit; 3323, spring;

[0056] 33211, rack; 33212, guide column;

[0057] 3331, pulley; 3332, driving tooth;

[0058] 3351, first transmission shaft; 3352, second transmission shaft; 3353, third transmission shaft; 3354, first belt transmission unit; 3355, trigger unit; 3356, transmission gear; 3357, second belt transmission unit

[0059] Yuan; 3358, first torsion spring; 3359, second torsion spring;

[0060] 33551, missing tooth block; 33552, push block;

[0061] 400, second transmission mechanism;

[0062] 41. a transmission component; 42. a second screening component;

[0063] 421. Second screen; 422. Receiver plate; 423. Slider; 424. Guide rail; 425. Hand crank. DETAILED DESCRIPTION

[0064] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0070] refer to Figure 1 , Figure 1 It is a schematic diagram of the three-dimensional structure of a tobacco stem screening device according to some embodiments of the present application. In some embodiments of the present application, a tobacco stem screening device includes a first transmission mechanism 100, a first screening mechanism 200, a sampling mechanism 300 and a second transmission mechanism 400. Among them, the first transmission mechanism 100 is used to transmit tobacco stems along a first straight line direction. The first screening mechanism 200 is used for preliminary screening of tobacco stems. The sampling mechanism 300 is used to obtain the preliminarily screened tobacco stems as samples. The second transmission mechanism 400 is used to transmit the tobacco stems in the sampling mechanism 300.

[0071] Further references Figure 2 , Figure 2 Schematic diagram of the three-dimensional structure of the first transmission mechanism and the first screening mechanism at a first viewing angle according to some embodiments of the present application. A conveyor belt 12 is provided on the first transmission mechanism 100, a loading station is provided at one end of the conveyor belt 12, and a transmission terminal 13 is provided at the other end of the conveyor belt 12. Tobacco stems are fed from the loading station to the conveyor belt 12, and the tobacco stems are transferred to the transmission terminal 13 along the conveyor belt 12. The first screening mechanism 200 is provided at the transmission terminal 13 of the first transmission mechanism 100, and the tobacco stems at the transmission terminal 13 are fed into the first screening mechanism 200, and the tobacco stems are preliminarily screened by the first screening mechanism 200.

[0072] The second transmission mechanism 400 is arranged directly below the first screening mechanism 200. After the tobacco stems are preliminarily screened in the first screening mechanism 200, the preliminarily screened tobacco stems fall to the second transmission mechanism 400 under the action of their own weight. The second transmission mechanism 400 is provided with a fine screening station, and the fine screening station is provided with a second screening component 42, and the second screening component 42 is used for secondary screening of the tobacco stems in the sampling mechanism 300. The preliminarily screened tobacco stems are finely screened by the second screening component 42 to automatically screen the tobacco stems. At the same time, the first screening mechanism 200 and the second screening component 42 screen twice, which is convenient for fully removing the debris in the tobacco stems to increase the tobacco content in the tobacco stems. Compared with the existing manual impurity picking method, the screening by the first screening mechanism 200 and the second screening component 42 can effectively reduce the labor intensity of manual work and reduce labor costs.

[0073] A sampling mechanism 300 is provided between the first screening mechanism 200 and the second transmission mechanism 400. The sampling mechanism 300 is located directly below the first screening mechanism 200. Figure 6 , 7 , Figure 6 is a schematic diagram of the three-dimensional structure of the sampling mechanism according to some embodiments of the present application at a first viewing angle, Figure 7 It is a schematic diagram of the three-dimensional structure of the sampling mechanism according to some embodiments of the present application at a first viewing angle. In this scheme, the sampling mechanism 300 includes a material receiving box 31 and an opening and closing assembly 33. The material receiving box 31 is hollow inside and has openings formed on the upper and lower surfaces, and valves are installed on the two openings accordingly. The opening and closing assembly 33 can control the opening and closing of the two valves so that the two openings are opened or closed. When the opening is opened, the tobacco stems fall from the first screening mechanism 200 to the second transmission mechanism 400 along the internal hollow of the material receiving box 31; when the opening is closed, a sealed space is formed inside the material receiving box 31.

[0074] Specifically, the valve includes a first valve 34 and a second valve 35, and the first valve 34 and the second valve 35 are sequentially arranged up and down. The opening and closing assembly 33 controls the opening and closing of the first valve 34 and the second valve 35, and the first valve 34 and the second valve 35 are opened and closed at different times, that is, the second valve 35 is closed before the first valve 34 and the second valve 35 is opened before the first valve 34. The second valve 35 is closed before the first valve 34, so that the tobacco stems preliminarily screened by the first screening mechanism 200 are accommodated in the receiving box 31. After a period of time, the first valve 34 is closed to prevent the tobacco stems preliminarily screened by the first screening mechanism 200 from falling into the receiving box 31. Subsequently, the second valve 35 opens before the first valve 34. After the second valve 35 is opened, the tobacco stems contained in the material receiving box 31 fall down. At this time, the first valve 34 is still in a closed state, preventing the tobacco stems preliminarily screened by the first screening mechanism 200 from falling into the material receiving box 31, so as to ensure the sampling quantity of the tobacco stems in the material receiving box 31, so that the data measured by sampling and weighing is more accurate.

[0075] Furthermore, a pressure sensor is provided inside the sampling mechanism 300, and the pressure sensor is used to detect the tobacco stems in the receiving box 31. Specific control steps:

[0076] Step 1: The first valve 34 is in an open state and the second valve 35 is in a closed state. At this time, the tobacco stems slide through valve 1 into the material receiving box 31 , so that the tobacco stems are contained in the material receiving box 31 .

[0077] Step 2: When the set unit time is over, the first valve 34 is closed, while the second valve 35 remains closed, keeping the tobacco stems in the receiving box 31 as samples. At this time, the pressure sensor weighs the tobacco stem samples in the receiving box 31.

[0078] Step 3: After weighing, the first valve 34 remains in the closed state and the second valve 35 is opened. At this time, the tobacco stems in the receiving box 31 fall onto the second transmission mechanism 400 in sequence through the second valve 35 or the tobacco stem samples in the receiving box 31 are transferred to the storage box for archiving.

[0079] The inspector can directly detect the weight of the sample obtained in the sampling mechanism 300 through the pressure sensor, so as to quickly measure the weight of the sample and improve the efficiency of the detection.

[0080] For example, Figure 2 As shown, the first transmission mechanism 100 includes brackets 11 arranged on both sides of the transmission belt 12. The brackets 11 located at the transmission end 13 form an annular guardrail, and the tobacco stems on the transmission belt 12 are sent into the annular guardrail. The first screening mechanism 200 is installed on the annular guardrail; wherein the first screening mechanism 200 includes a box body 21 and a first screening component 22, and the first screening component 22 is mounted on the box body 21.

[0081] Specifically, refer to Figure 3 , 4 , Figure 3 for Figure 2 A partial enlarged schematic diagram of point A in the middle. Figure 4 Schematic diagram of the three-dimensional structure of the first transmission mechanism and the first screening mechanism at a second viewing angle according to some embodiments of the present application. The first screening assembly 22 includes a first motor 221 and a screening element 223, and the first motor 221 drives the screening element 223 to reciprocate. The screening element 223 includes a rotating shaft 2231 and a first screen 2233 arranged on the rotating shaft 2231 along a second linear direction, and the rotating shaft 2231 is mounted on the box 21. The second linear direction is a linear direction perpendicular to the first linear direction.

[0082] When the box 21 is installed on the annular guardrail, the first screen 2233 is located in the hollow space of the annular guardrail, and the tobacco stems pass through the gaps between the first screens 2233 for screening, and large particles of debris will be separated on the first screen 2233. After the tobacco stems are preliminarily screened by the first screen 2233, the preliminarily screened tobacco stems fall along the material box 31 onto the second transmission mechanism 400.

[0083] In a preferred embodiment, the first screen 2233 includes a magnetic layer, which absorbs metal impurities through the magnetic layer. At the same time, the sampling mechanism 300 is arranged between the first screening mechanism 200 and the second transmission mechanism 400. Since the weight of metal impurities is much greater than the weight of other impurities and the weight of large-particle impurities is large, metal and / or large-particle impurities will have a great impact on the weight of the sample. The weight of a small amount of metal and / or large-particle impurities accounts for a large proportion of the sample weight, which is easy to mislead the judgment of the content of tobacco in the tobacco stems. Therefore, in this solution, the sampling mechanism 300 is arranged between the first screening mechanism 200 and the second transmission mechanism 400, so as to first remove a small amount of metal and / or large-particle impurities with large variables in the tobacco stems, and then sample the sampling mechanism 300 to improve the accuracy of the detected samples.

[0084] In some embodiments of the present application, Figure 4 As shown, and further reference Figure 5 , Figure 5 Schematic diagram of the three-dimensional structure of the trigger disk according to some embodiments of the present application. The first screening mechanism 200 includes a vibration assembly 23, and the vibration assembly 23 drives the first screening assembly 22 to reciprocate along the second straight line direction. Specifically, the vibration assembly 23 includes a trigger disk 232 and a driver. Among them, a cam 2321 is provided on the trigger disk 232, and the first screening assembly 22 is provided with a ball 2232 in contact with the cam 2321. An elastic reset element 225 is provided between the first screening assembly 22 and the box body 21. The ball 2232 is provided at one end of the rotating shaft 2231, and the reset element 225 is installed on the other end of the rotating shaft 2231. The ball 2232 protrudes from the side wall of the box body 21, and a mounting frame 224 is provided on the outer wall of the box body 21, and the elastic reset element 225 is connected between the rotating shaft 2231 and the mounting frame 224.

[0085] When the driver drives the trigger plate 232 to rotate, the cam 2321 periodically contacts the sphere 2232. When the cam 2321 contacts the sphere 2232, the cam 2321 pushes the first screening component 22 to move along the second straight line direction, causing the reset element 225 to deform elastically. When the cam 2321 is out of contact with the sphere 2232, the first screening component 22 moves in the opposite direction along the second straight line direction under the restoring action of the reset element 225. The first screening component 22 swings back and forth in the second straight line direction to facilitate the tobacco stems to pass through the gaps in the first screen 2233.

[0086] Exemplarily, a plurality of cams 2321 are circumferentially arranged on the trigger disk 232, so that the cams 2321 form a wave-like convex structure on the outer periphery of the trigger disk 232, and the ball 2232 can slide from the convex point to the concave point on the cam 2321. The trigger disk 232 includes a rotating wheel 2322, which is driven by the belt transmission part 231 to drive the trigger disk 232 to rotate, so that the plurality of cams 2321 contact the ball 2232 one by one.

[0087] like Figure 6 , 7 As shown, in some embodiments of the present application, the sampling mechanism 300 further includes a support seat 32, and an opening and closing assembly 33 is used to control the opening and closing of the two valves. The support seat 32 is located on one side of the material receiving box 31, and the opening and closing assembly 33 is installed on the support seat 32. Figure 8-10 , Figure 8 is a schematic diagram of a three-dimensional structure of an opening and closing assembly according to some embodiments of the present application, Fig. 9 for Figure 8 A partial enlarged schematic diagram of point B in the middle. Fig.10 The schematic diagram of the partial structure of the opening and closing assembly according to some embodiments of the present application is as follows: The opening and closing assembly 33 comprises a second motor 331, two door opening parts and a misalignment part 335, and the two door opening parts are connected to the valve in a one-to-one corresponding manner.

[0088] The second motor 331 is in transmission connection with the two door opening parts through the offset part 335, so that the two valves are opened and closed at different times.

[0089] Specifically, the dislocation part 335 includes a transmission shaft and a trigger unit 3355, a first torsion spring 3358 is connected between the trigger unit 3355 and the transmission shaft, and the trigger unit 3355 is installed on the power output end of the second motor 331. Among them, the transmission shaft includes a first transmission shaft 3351 and a second transmission shaft 3352, and the first transmission shaft 3351 and the second transmission shaft 3352 are connected by a second torsion spring 3359 to form a transmission shaft. The trigger unit 3355 is installed on the first transmission shaft 3351, that is, the first torsion spring 3358 is arranged between the trigger unit 3355 and the first transmission shaft 3351.

[0090] The door opening part includes a first door opening part 334 and a second door opening part 336, and the second transmission shaft 3352 is arranged in transmission connection with the second door opening part 336. The trigger unit 3355 drives the first door opening part 334 to drive the first valve 34 to open and close. The transmission shaft drives the second door opening part 336 to drive the second valve 35 to open and close. The opening and closing assembly 33 also includes a driving part 332. The second motor 331 drives the transmission shaft to rotate, and the trigger unit 3355 pushes the driving part 332, and the driving part 332 drives the first door opening part 334 to open and close through a driven part 333. The torsion spring strength of the second torsion spring 3359 is greater than the torsion spring strength of the first torsion spring 3358. The first transmission shaft 3351 and the second transmission shaft 3352 are relatively rotated to overcome the force of the second torsion spring 3359, so that the two valves are closed at different times.

[0091] Exemplarily, the door opening part drives the valve to rotate through a belt drive. Each valve includes two half door bodies, and the two half door bodies rotate so that the two half door bodies are closed or opened. Among them, two pulleys are driven by a belt to rotate simultaneously. One of the pulleys is integrated with a gear, and one half of the door body is connected to the driven tooth meshing with the gear, and the other half of the door body is connected to the other pulley, so that the two half door bodies rotate relative to each other.

[0092] Furthermore, the transmission shaft further includes a third transmission shaft 3353, and the second transmission shaft 3352 is transmission-connected with the third transmission shaft 3353 via a first belt transmission unit 3354. The dislocation portion 335 includes a transmission tooth 3356, and the transmission tooth 3356 is transmission-connected with the third transmission shaft 3353 via a second belt transmission unit 3357. The trigger unit 3355 includes a toothless block 33551 and a push block 33552, wherein the toothless block 33551 is fixedly connected with the push block 33552, the toothless block 33551 is intermittently meshed with the transmission tooth 3356, and the push block 33552 pushes the driving portion 332 intermittently.

[0093] The driving part 332 includes a sliding frame 3321 and a stop unit 3322. The sliding frame 3321 is slidably connected to the stop unit 3322. The sliding frame 3321 is provided with a guide post 33212, which is inserted into the stop unit 3322. The sliding frame 3321 is guided by the guide post 33212 to slide relative to the stop unit 3322. A spring 3323 is sleeved on the guide post 33212. A rack 33211 is provided on the surface of the sliding frame 3321, and the driven part 333 includes a driving tooth 3332 matched with the rack 33211. The first door opening part 334 is meshed with the rack 33211 through the driving tooth 3332, and the sliding frame 3321 drives the first door opening part 334. The first door opening part 334 and the driving tooth 3332 are driven by a belt. The driving tooth 3332 is provided with a pulley 3331, and the first door opening part 334 is provided with a driven pulley connected to the pulley 3331. A belt is connected between the pulley 3331 and the driven pulley. Under the pushing action of the pushing block 33552 on the sliding frame 3321, the sliding frame 3321 slides relative to the stop unit 3322 to squeeze the spring 3323. When the external driving force is removed, the spring 3323 drives the sliding frame 3321 to reset under the recovery action.

[0094] Exemplarily, the opening and closing assembly 33 specifically controls the staggered opening and closing of the two valves to enable the sampling mechanism 300 to obtain the sample, including: the second motor 331 drives the toothless block 33551 and the push block 33552 to rotate 90° counterclockwise. The push block 33552 drives the first transmission shaft 3351 to rotate through the first torsion spring 3358, the first transmission shaft 3351 drives the second transmission shaft 3352 to rotate through the second torsion spring 3359, the second transmission shaft 3352 drives the second valve 35 to close, the second motor 331 is paused, and the tobacco stems fall into the receiving box 31 through the first valve 34 in sequence.

[0095] After the second valve 35 is closed, the second valve 35 is stuck, and the second transmission shaft 3352 cannot continue to rotate. After a unit time, the second motor 331 is started, and the second motor 331 continues to drive the toothless block 33551 and the push block 33552 to rotate counterclockwise. The push block 33552 continues to drive the first transmission shaft 3351 to rotate through the first torsion spring 3358, and the first transmission shaft 3351 and the second transmission shaft 3352 rotate relative to each other to overcome the force of the second torsion spring 3359. When the toothless block 33551 and the push block 33552 rotate another 90°, the push block 33552 contacts the sliding frame 3321 and pushes the sliding frame 3321 to move, and the sliding frame 3321 drives the driving teeth 3332 to rotate. The driving teeth 3332 drive the first valve 34 to close through a series of transmissions, and the second motor 331 is paused, and the tobacco stems cannot continue to pass through the first valve 34.

[0096] After the first valve 34 is closed, the first valve 34 is stuck, and the pressure sensor weighs the tobacco stems in the receiving box 31. Then, the second motor 331 is started, and the second motor 331 continues to drive the toothless block 33551 and the push block 33552 to rotate counterclockwise, so that the toothless block 33551 and the transmission gear 3356 are meshed with each other, the toothless block 33551 drives the transmission gear 3356 to rotate, the transmission gear 3356 drives the second belt transmission unit 3357 to move, the second belt transmission unit 3357 drives the third transmission shaft 3353 to rotate, the third transmission shaft 3353 drives the second transmission shaft 3352 to rotate in the opposite direction through the first belt transmission unit 3354, and the second transmission shaft 3352 drives the second valve 35 to open. The weighed tobacco stems are discharged through the second valve 35, and at this time, the first valve 34 above is still closed.

[0097] After completing the above steps, the second motor 331 is reversed and then reset, and the above steps are repeated for continuous sampling.

[0098] refer to Fig.11 , 12 , Fig.11 is a schematic diagram of a three-dimensional structure of a second transmission mechanism according to some embodiments of the present application, Fig.12 It is a schematic diagram of the three-dimensional structure of the second screening component according to some embodiments of the present application. In some embodiments of the present application, the second transmission mechanism 400 includes a transmission component 41. The second screening component 42 is installed on the transmission component 41, and the tobacco stems preliminarily screened by the first screening mechanism 200 fall to the loading station at one end of the transmission component 41, and the other end of the transmission component 41 is the unloading station. The fine screening station is arranged between the loading station and the unloading station. Specifically, the transmission component 41 and the first transmission mechanism 100 also transport tobacco stems through the conveyor belt 12 structure, and the loading station, the fine screening station, and the unloading station are arranged along the first straight line direction. The first transmission mechanism 100 is arranged parallel to the feeding direction of the transmission component 41.

[0099] Further, the second screening component 42 includes a receiving plate 422. The receiving plate 422 is mounted on the transmission component 41, and a second screen 421 is provided on the receiving plate 422. The second screen 421 is used to block the moving path of the transmission component 41, so that the second screen 421 further screens the tobacco stems so as to increase the content of tobacco shreds in the tobacco stems. Specifically, the receiving plate 422 and the second screen 421 are arranged to form an angle. A bracket is provided on the transmission component 41, and the receiving plate 422 is rotatably connected to the bracket. An arc-shaped guide rail 424 is provided on the bracket, and a slider 423 is connected to the receiving plate 422. The slider 423 is located in the guide rail 424, so that the receiving plate 422 is limited in its rotation path by the slider 423 and the guide rail 424. When there are a lot of debris in the screening process, the receiving plate 422 rotates a certain angle so that the impurities screened out by the second screen 421 fall onto the receiving plate 422 for easy cleaning by operators.

[0100] Furthermore, a hand crank 425 is also provided on the receiving plate 422, and the operator can use the hand crank 425 to move the receiving plate 422, so that the receiving plate 422 rotates clockwise along the direction defined by the guide rail 424, which is convenient for the operator to drive the receiving plate 422 to rotate. It should be noted that the receiving plate 422 includes but is not limited to being manually moved by the hand crank 425, and the receiving plate 422 can also be driven by a motor.

[0101] Preferably, the number of second screening components 42 is at least two, and the second screening components 42 are arranged along the feeding direction of the transmission component 41, so that the tobacco stems are screened multiple times through each second screening component 42 one by one, thereby increasing the tobacco content in the tobacco stems and facilitating the screening of high-purity tobacco stems.

[0102] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A tobacco stem screening device, It is characterized in that include: A first conveying mechanism (100), the first conveying mechanism (100) being used to convey tobacco stems along a first straight line direction; a first screening mechanism (200) for preliminary screening of tobacco stems, the first screening mechanism (200) being arranged at a transmission end (13) of the first transmission mechanism (100) so that the tobacco stems on the first transmission mechanism (100) are transported into the first screening mechanism (200); a sampling mechanism (300) for receiving preliminarily screened tobacco stems, the sampling mechanism (300) being arranged directly below the first screening mechanism (200); and a second conveying mechanism (400) for conveying tobacco stems in the sampling mechanism (300); the second conveying mechanism (400) is arranged directly below the sampling mechanism (300); a fine screening station is arranged on the second conveying mechanism (400); a second screening component (42) is arranged on the fine screening station; the second screening component (42) is used for secondary screening of tobacco stems in the sampling mechanism (300); The first screening mechanism (200) comprises a first screening component (22) and a vibration component (23), wherein the vibration component (23) drives the first screening component (22) to reciprocate along a second straight line direction perpendicular to the first straight line direction; The first screening mechanism (200) further comprises a box (21), and the first screening component (22) is mounted on the box (21); The vibration component (23) comprises a trigger disk (232) and a driver, the trigger disk (232) is provided with a cam (2321), and the first screening component (22) is provided with a ball (2232) in contact with the cam (2321); An elastic reset element (225) is provided between the first screening component (22) and the box body (21), and the driver drives the trigger disk (232) to rotate, so that the cam (2321) intermittently pushes the first screening component (22) to move along the second straight line direction; The first screening component (22) comprises a first motor (221) and a screening element (223), wherein the first motor (221) drives the screening element (223) to reciprocate; The screening element (223) comprises a rotating shaft (2231) and a first screen (2233) arranged on the rotating shaft (2231) along the second straight line direction, and the rotating shaft (2231) is mounted on the box body (21); The sphere (2232) is disposed at one end of the rotating shaft (2231), and the reset element (225) is mounted on the other end of the rotating shaft (2231); The cam (2321) is arranged circumferentially on the trigger disk (232), so that the cam (2321) forms a wave-shaped protruding structure on the outer circumference of the trigger disk (232).

2. The screening device according to claim 1, It is characterized in that The sampling mechanism (300) comprises a material receiving box (31) and an opening and closing assembly (33); the material receiving box (31) is hollow inside and has openings formed on the upper and lower surfaces; valves are correspondingly mounted on the two openings; and the opening and closing assembly (33) is used to control the opening and closing of the two valves.

3. The screening device according to claim 2, It is characterized in that The opening and closing assembly (33) comprises a second motor (331), two door opening parts and a misalignment part (335), and the two door opening parts are connected to the valve in a one-to-one driving manner; The second motor (331) is transmission-connected to the two door opening parts via the offset part (335), so that the two valves open and close at different times.

4. The screening device according to claim 3, It is characterized in that The dislocation portion (335) comprises a transmission shaft and a trigger unit (3355); the second motor (331) drives the trigger unit (3355) to drive the transmission shaft; the transmission shaft comprises a first transmission shaft (3351) and a second transmission shaft (3352); the first transmission shaft (3351) and the second transmission shaft (3352) are connected via a second torsion spring (3359) to form the transmission shaft; The door opening portion comprises a first door opening portion (334) and a second door opening portion (336); the trigger unit (3355) is mounted on the first transmission shaft (3351); and the second transmission shaft (3352) is arranged in transmission connection with the second door opening portion (336); The opening and closing assembly (33) further comprises a driving part (332), the second motor (331) drives the transmission shaft to rotate, the trigger unit (3355) pushes the driving part (332), and the driving part (332) drives the first door opening part (334) to open and close.

5. The screening device according to claim 4, It is characterized in that The transmission shaft further comprises a third transmission shaft (3353), and the second transmission shaft (3352) is transmission-connected to the third transmission shaft (3353) via a first belt transmission unit (3354); The dislocation portion (335) comprises a transmission tooth (3356), and the transmission tooth (3356) is transmission-connected to the third transmission shaft (3353) via a second belt transmission unit (3357); The trigger unit (3355) comprises a toothless block (33551) and a pushing block (33552); the toothless block (33551) is fixedly connected to the pushing block (33552); the toothless block (33551) and the transmission teeth (3356) are intermittently meshed, and the pushing block (33552) intermittently pushes the driving portion (332).

6. The screening device according to claim 4, It is characterized in that The driving part (332) comprises a sliding frame (3321) and a stop unit (3322), and the sliding frame (3321) and the stop unit (3322) are slidably connected; A rack (33211) is provided on the surface of the sliding frame (3321), and the first door opening portion (334) is meshed with the rack (33211) via a driving tooth (3332), so that the sliding frame (3321) drives the first door opening portion (334).

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