Tobacco stem screening device

Abstract

The tobacco stem screening device comprises a tobacco stem conveying belt, the tobacco stem conveying belt conveys tobacco stems to a detection platform through a discharging end, the detection platform is provided with a moisture detector, and the moisture detector can detect moisture of the tobacco stems on the detection platform; the tobacco stem conveying device further comprises a material shifting mechanism arranged between the feeding end and the discharging end, the material shifting mechanism comprises a material shifting plate, the material shifting plate extends in the moving direction of the tobacco stem conveying belt and is provided with a material shifting sharp corner facing the direction of the feeding end, and the material shifting sharp corner can shift tobacco stems so that the tobacco stems can rotate in the extending direction of the material shifting plate. If an included angle exists between the extending direction of the tobacco stems and the shifting plate, the tobacco stems cannot continue to advance due to the stopping effect of the shifting sharp corner, and the tobacco stems behind apply acting force to the tobacco stems abutting against the shifting sharp corner till the tobacco stems rotate to be the same as or close to the extending direction of the shifting plate, and then the tobacco stems can pass through the two sides of the shifting plate; in this way, the moving direction of the tobacco stems is changed through the shifting plate.

Description

Technical Field

[0001] This application belongs to the field of tobacco processing technology, specifically relating to a tobacco stem screening device. Background Technology

[0002] In tobacco processing, cleaning the tobacco stems is a crucial step. This is primarily achieved through a stem washing machine that sprays circulating water to remove dust, sand, metal and non-metal impurities from the stem surface. The water also removes pectin and increases the stem's moisture content, making it clean and soft to meet the requirements of subsequent processing steps. This process also effectively protects the blades of the shredder. After washing, the stems need to be dehydrated before further processing. Excessive moisture content can lead to reduced quality, even blackening and rendering the stems unusable for processing. Therefore, the moisture content of dehydrated stems must be tested. Only stems with a moisture content below a preset level are sent to the next processing step; those with a higher moisture content require repeated dehydration.

[0003] When conducting moisture testing on tobacco stems, due to efficiency requirements, a large number of tobacco stems need to be sent to the testing area in batches via conveyor belt. Because tobacco stems have a high density and high humidity after washing, and tobacco stems of different volumes and materials have different water absorption efficiencies, the moisture content of different parts of the tobacco stem bundle is not the same. It is easy for tobacco stems with high moisture content to be hidden inside the tobacco stem bundle and cannot be detected by the moisture detector. As a result, tobacco stems with high moisture content are sent to the next process for processing, which affects the quality of the finished tobacco product. Utility Model Content

[0004] This application provides a tobacco stem screening device to solve the technical problem of low accuracy in detecting the moisture content of tobacco stems caused by the disordered arrangement of tobacco stems in the tobacco stem pile in the traditional technology.

[0005] The technical solution adopted in this application is as follows:

[0006] A tobacco stem screening device includes a tobacco stem conveyor belt, which includes an inlet end, an outlet end, and a feeding surface for carrying tobacco stems. The tobacco stem conveyor belt circulates to transport tobacco stems on the feeding surface from the inlet end to the outlet end. It also includes a detection platform connected to the outlet end, through which the tobacco stem conveyor belt transports tobacco stems to the detection platform. The detection platform is equipped with a moisture detector capable of detecting the moisture content of the tobacco stems on the detection platform. Furthermore, it includes a material-pushing mechanism disposed between the inlet end and the outlet end. The material-pushing mechanism includes a material-pushing plate extending along the direction of movement of the tobacco stem conveyor belt and having a material-pushing tip facing the inlet end. The material-pushing tip can push the tobacco stems to rotate in the direction of extension of the material-pushing plate.

[0007] The tobacco stem screening device described in this application also includes the following additional technical features:

[0008] The number of material-pulling plates is multiple, and the multiple material-pulling plates are arranged at intervals along the width direction of the tobacco stem conveyor belt and connected in sequence by a linkage rod. The linkage rod can drive the material-pulling plates to reciprocate along the width direction of the tobacco stem conveyor belt.

[0009] It also includes a feeding platform located in front of the feed end of the tobacco stem conveyor belt. There are multiple tobacco stem conveyor belts, each connected to the feeding platform. The multiple tobacco stem conveyor belts are arranged side by side, and a vertically extending guide is provided between two adjacent tobacco stem conveyor belts. The guide is located in front of the feed end and has a first guide surface and a second guide surface. The extended surfaces of the first guide surface and the second guide surface intersect with the tobacco stem conveyor belts on both sides. The first guide surface and the second guide surface are set at an angle and form a guide angle between them.

[0010] The interior angle of the guide tip is α, where 30°≤α≤45°.

[0011] The guide component is movably connected to the feeding platform, and the guide component has a first rotation direction toward the first guide surface and a second rotation direction toward the second guide surface.

[0012] The rotation angle of the guide component along the first rotation direction is β, and the rotation angle of the guide component along the second rotation direction is λ; 10°≤β≤15°, and / or, 10°≤λ≤15°.

[0013] A scraping mechanism is provided between the guide component and the push plate. The scraping mechanism includes a first support rod located on both sides of the feeding platform and a second support rod connected to the two first support rods respectively. A scraping sleeve is sleeved on the outside of the second support rod. The scraping sleeve can rotate around the second support rod. The guide component and the push plate have the same vertical height and are flush with the lower surface of the scraping sleeve.

[0014] The scraper sleeve is provided with multiple scraper blades, which extend along the length of the scraper sleeve.

[0015] The moisture detector is an infrared moisture meter.

[0016] The detection platform is equipped with a recycling conveyor belt at its bottom. The detection platform includes a leakage area located above the recycling conveyor belt, so that tobacco stems can fall from the leakage area onto the recycling conveyor belt. The detection platform is equipped with a movable cover plate at the leakage area. The movable cover plate has a first position for opening the leakage area and a second position for closing the leakage area. The moisture detector controls the movable cover plate to switch between the first position and the second position through a control unit.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0018] 1. The tobacco stem screening device of this application includes a tobacco stem conveyor belt. Tobacco stems are fed into the conveyor belt through the feed end, and then the feed surface drives the tobacco stems to move and is sent to the detection platform through the discharge end. After the tobacco stems are placed on the detection platform, a moisture detector is used to detect the tobacco stems. A deflector plate is provided between the feed end and the discharge end. If the extension direction of the tobacco stem is the same as or nearly parallel to the deflector plate, it will continue to move forward on both sides of the deflector plate. If the extension direction of the tobacco stem is at an angle to the deflector plate, it will be blocked by the deflector tip and will not be able to move forward. The tobacco stems behind will exert a force on the tobacco stems that are against the deflector tip. Therefore, the tobacco stems that are against the deflector tip will be rotated by the synchronous force of the deflector tip and the tobacco stems behind, until they rotate to be the same as or nearly the same as the extension direction of the deflector plate, and can then pass through both sides of the deflector plate. In this way, the deflector plate changes the direction of movement of the tobacco stems. In addition, When tobacco stems clump together, they easily slide and disperse along the direction of the dispensing plate under the pushing force of the tobacco stems behind them, thus continuing to move forward. This helps to improve the uniformity of tobacco stem distribution and reduce the probability of inaccurate moisture content detection caused by tobacco stems accumulating and clustering.

[0019] 2. In a preferred embodiment of this application, the number of material-pulling plates is set to multiple and connected sequentially by a linkage rod. On the one hand, this provides mounting positions for the material-pulling plates, and a single linkage rod can realize the synchronous installation of multiple material-pulling plates. On the other hand, the linkage rod drives the material-pulling plates to reciprocate along the width direction of the tobacco stem conveyor belt, so that the material-pulling plates can better disperse the clumps of tobacco stems during the movement, thereby achieving better straightening of the tobacco stems by the material-pulling plates, increasing the uniformity of tobacco stem arrangement, and helping to improve the accuracy of tobacco stem moisture content detection.

[0020] 3. As a preferred embodiment of this application, by setting up multiple tobacco stem conveyor belts and feeding multiple tobacco stem conveyor belts uniformly through a front feeding platform, the detection efficiency is greatly improved. Furthermore, by setting up guide components between two adjacent tobacco stem conveyor belts, the tobacco stems conveyed from the feeding platform to the tobacco stem conveyor belts can be guided. When the tobacco stems come into contact with the guide components, they will move along the extension direction of the first and second guide surfaces on the left and right sides under the action of the guide tip. Since the extension surfaces of the first and second guide surfaces intersect with the tobacco stem conveyor belts on both sides, the tobacco stems moving along the first and second guide surfaces will continue to move until they reach the tobacco stem conveyor belt after leaving the guide components, thus achieving smooth movement of tobacco stems from the feeding platform to the tobacco stem conveyor belt. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a top view of a tobacco stem sieving device according to one embodiment of this application;

[0023] Figure 2 for Figure 1 Enlarged view of part A;

[0024] Figure 3 This is a side view of a tobacco stem sieving device according to one embodiment of this application.

[0025] in:

[0026] 1. Tobacco stem conveyor belt; 11. Feeding end; 12. Discharge end; 13. Feeding surface;

[0027] 2. Testing platform;

[0028] 3. Moisture detector;

[0029] 4. Material feeding plate, 41. Material feeding tip;

[0030] 5 linkages;

[0031] 6. Feeding platform;

[0032] 7. Guide component; 71. First guide surface; 72. Second guide surface; 73. Guide tip;

[0033] 8. Scraper sleeve; 81. Scraper plate;

[0034] 9. First support rod. Detailed Implementation

[0035] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0037] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0040] like Figures 1 to 3As shown, a tobacco stem screening device includes a tobacco stem conveyor belt, which includes an inlet end 11, an outlet end 12, and a feeding surface 13 for carrying tobacco stems. The tobacco stem conveyor belt circulates to transport the tobacco stems on the feeding surface 13 from the inlet end 11 to the outlet end 12. It also includes a detection platform 2 connected to the outlet end 12. The tobacco stem conveyor belt transports tobacco stems to the detection platform 2 through the outlet end 12. The detection platform 2 is equipped with a moisture detector 3, which can detect the moisture content of the tobacco stems on the detection platform 2. It also includes a material-pulling mechanism located between the inlet end 11 and the outlet end 12. The material-pulling mechanism includes a material-pulling plate 4, which extends along the movement direction of the tobacco stem conveyor belt and has a material-pulling tip 41 facing the inlet end 11. The material-pulling tip 41 can pry the tobacco stems so that the tobacco stems rotate in the direction of extension of the material-pulling plate 4.

[0041] The tobacco stem screening device of this application includes a tobacco stem conveyor belt 1. Tobacco stems are fed into the conveyor belt 1 through the feed end 11, and then driven to move by the feeding surface 13 and fed into the detection platform 2 through the discharge end 12. Once the tobacco stems are placed on the detection platform 2, they are detected by a moisture detector 3. A deflector plate 4 is provided between the feed end 11 and the discharge end 12. If the tobacco stem extends in the same direction as or nearly parallel to the deflector plate 4, it will continue to move forward on both sides of the deflector plate 4. If the tobacco stem extends... If the extending direction forms an angle with the feeding plate 4, it will be stopped by the feeding tip 41 and unable to continue moving forward. Meanwhile, the tobacco stems behind it will exert a force on the tobacco stems that are against the feeding tip 41. Therefore, the tobacco stems against the feeding tip 41 will rotate due to the synchronous force of the feeding tip 41 and the tobacco stems behind it, until they rotate to the same or nearly the same direction as the extending direction of the feeding plate 4, allowing them to pass through both sides of the feeding plate 4. This achieves the change of the tobacco stem movement direction by the feeding plate 4. Furthermore, for clumps of tobacco stems, when they come into contact with the feeding tip 41, they are easily dispersed along the extending direction of the feeding plate 4 under the pushing force of the tobacco stems behind them, thus helping to improve the uniformity of tobacco stem distribution and reducing the probability of inaccurate moisture content detection caused by tobacco stem clumping.

[0042] In a preferred embodiment of this application, there are multiple material feeding plates 4, which are arranged at intervals along the width direction of the tobacco stem conveyor belt and connected in sequence by a connecting rod 5. The connecting rod 5 can drive the material feeding plates 4 to reciprocate along the width direction of the tobacco stem conveyor belt.

[0043] Multiple material-pulling plates 4 are set and connected sequentially by connecting rods 5. On the one hand, this provides installation positions for the material-pulling plates 4, and a single connecting rod 5 can realize the synchronous installation of multiple material-pulling plates 4. On the other hand, the connecting rods 5 drive the material-pulling plates 4 to reciprocate along the width direction of the tobacco stem conveyor belt, so that the material-pulling plates 4 can better disperse the clumps of tobacco stems during the movement, thereby achieving better straightening of the tobacco stems by the material-pulling plates 4, increasing the uniformity of tobacco stem arrangement, and helping to improve the accuracy of tobacco stem moisture content detection.

[0044] As a preferred embodiment of this application, it also includes a feeding platform 6 located in front of the feeding end 11 of the tobacco stem conveyor belt 1. There are multiple tobacco stem conveyor belts 1 and they are connected to the feeding platform 6 respectively. The multiple tobacco stem conveyor belts 1 are arranged side by side and a vertically extending guide 7 is provided between two adjacent tobacco stem conveyor belts 1. The guide 7 is located in front of the feeding end 11 and has a first guide surface 71 and a second guide surface 72. The extended surfaces of the first guide surface 71 and the second guide surface 72 intersect with the tobacco stem conveyor belts 1 on both sides respectively. The first guide surface 71 and the second guide surface 72 are set at an angle and form a guide angle 73 between them.

[0045] By setting up multiple tobacco stem conveyor belts 1 and feeding them uniformly through the front feeding platform 6, the detection efficiency is greatly improved. Furthermore, the guide component 7 is set between two adjacent tobacco stem conveyor belts 1, which can guide the tobacco stems conveyed from the feeding platform 6 to the tobacco stem conveyor belt 1. When the tobacco stems come into contact with the guide component 7, they will move along the extension direction of the first guide surface 71 and the second guide surface 72 on the left and right sides under the action of the guide tip 73. Since the extension surfaces of the first guide surface 71 and the second guide surface 72 intersect with the tobacco stem conveyor belts 1 on both sides, the tobacco stems moving along the first guide surface 71 and the second guide surface 72 will continue to move until they reach the tobacco stem conveyor belt 1 after leaving the guide component 7, thus achieving the smooth movement of tobacco stems from the feeding platform 6 to the tobacco stem conveyor belt 1.

[0046] As a preferred embodiment of this implementation, such as Figure 1 As shown, the interior angle of the guide tip 73 is α, 30°≤α≤45°. Setting α to 30°≤α≤45° allows the guide tip 73 to effectively separate and guide the clumps of tobacco stems, thereby enabling the tobacco stems to move well along the first guide surface 71 and the second guide surface 72 under the action of the guide tip 73.

[0047] As a preferred example of this embodiment, the guide member 7 is movably connected to the feeding platform 6. The guide member 7 has a first rotation direction that rotates towards the first guide surface 71 and a second rotation direction that rotates towards the second guide surface 72. When the tobacco stem contacts the guide member 7, the guide member 7 is subjected to the force exerted by the tobacco stem and rotates in the first rotation direction or the second rotation direction, thereby better guiding the tobacco stem to move towards the first guide surface 71 or the second guide surface 72.

[0048] Preferably, the rotation angle of the guide member 7 along the first rotation direction is β, and the rotation angle of the guide member 7 along the second rotation direction is λ; 10°≤β≤15°, and / or, 10°≤λ≤15°.

[0049] In another preferred embodiment of this method, a leveling mechanism is provided between the guide member 7 and the dispensing plate 4. The leveling mechanism includes first support rods 9 located on both sides of the feeding platform 6 and second support rods connected to the two first support rods 9 respectively. A scraping sleeve 8 is sleeved on the outside of the second support rod. The scraping sleeve 8 can rotate around the second support rod. The guide member 7 and the dispensing plate 4 have the same vertical height and are flush with the lower surface of the scraping sleeve 8. By setting up the leveling mechanism, for tobacco stem clumps that are stacked in large quantities and have a high height, after the tobacco stem clumps come into contact with the scraping sleeve 8, the scraping sleeve 8 rotates around the first support rods 9 under the force of the tobacco stems, thereby leveling the upper surface of the tobacco stem clumps and ensuring that the vertical height of the tobacco stem clumps is consistent. This achieves the consistency of the vertical height of the tobacco stem clumps with the guide member 7 and the dispensing plate 4, thereby achieving uniformity of material guidance of the tobacco stem clumps in the vertical direction by the guide member 7 and uniformity of dispersion of the tobacco stem clumps in the vertical direction by the dispensing plate 4.

[0050] Preferably, the scraper sleeve 8 is provided with a plurality of scraper plates 81, which extend along the length of the scraper sleeve 8. By providing scraper plates 81, the scraping efficiency of the scraper sleeve 8 on the tobacco stem can be improved.

[0051] In a preferred embodiment of this application, the moisture detector 3 is an infrared moisture meter. The infrared moisture meter emits infrared light of a specific wavelength onto the surface of the tobacco stem and then measures the intensity of the reflected infrared light. Since water molecules have a strong ability to absorb infrared light, when the tobacco stem contains a lot of moisture, its absorption capacity for infrared light will also increase accordingly, resulting in a decrease in the intensity of the reflected infrared light. By measuring the change in the intensity of the reflected infrared light, the moisture content in the tobacco stem can be inferred relatively accurately.

[0052] In a preferred embodiment of this application, the detection platform 2 is equipped with a recycling conveyor belt at its bottom. The detection platform 2 includes a material leakage area located above the recycling conveyor belt, allowing tobacco stems to fall from the leakage area onto the recycling conveyor belt. The detection platform 2 has a movable cover plate at the leakage area, which has a first position for opening the leakage area and a second position for closing the leakage area. The moisture detector controls the movable cover plate to switch between the first and second positions via a control unit. By setting up the movable cover plate and the recycling conveyor belt below, when the moisture detector detects that the moisture content of the tobacco stems does not meet the standard, the control unit can directly control the movable cover plate to move to the first position, thereby allowing the tobacco stems with substandard moisture content to be lowered onto the recycling conveyor belt for secondary drying.

[0053] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0054] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. The above descriptions are merely embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A tobacco stem sieving device, characterized in that, The device includes a tobacco stem conveyor belt, which has an inlet end, an outlet end, and a feeding surface for carrying tobacco stems. The tobacco stem conveyor belt circulates to transport tobacco stems on the feeding surface from the inlet end to the outlet end. It also includes a detection platform connected to the outlet end, through which the tobacco stem conveyor belt transports tobacco stems to the detection platform. The detection platform is equipped with a moisture detector that can detect the moisture content of the tobacco stems on the detection platform. Furthermore, it includes a material-shifting mechanism located between the inlet end and the outlet end. The material-shifting mechanism includes a material-shifting plate that extends along the direction of movement of the tobacco stem conveyor belt and has a material-shifting tip facing the inlet end. The material-shifting tip can shift the tobacco stems to rotate in the direction of extension of the material-shifting plate.

2. The tobacco stem screening device according to claim 1, characterized in that, The number of material-pulling plates is multiple, and the multiple material-pulling plates are arranged at intervals along the width direction of the tobacco stem conveyor belt and connected in sequence by a linkage rod. The linkage rod can drive the material-pulling plates to reciprocate along the width direction of the tobacco stem conveyor belt.

3. The tobacco stem screening device according to claim 1, characterized in that, It also includes a feeding platform located in front of the feed end of the tobacco stem conveyor belt. There are multiple tobacco stem conveyor belts, each connected to the feeding platform. The multiple tobacco stem conveyor belts are arranged side by side, and a vertically extending guide is provided between two adjacent tobacco stem conveyor belts. The guide is located in front of the feed end and has a first guide surface and a second guide surface. The extended surfaces of the first guide surface and the second guide surface intersect with the tobacco stem conveyor belts on both sides. The first guide surface and the second guide surface are set at an angle and form a guide angle between them.

4. The tobacco stem screening device according to claim 3, characterized in that, The interior angle of the guide tip is α, where 30°≤α≤45°.

5. The tobacco stem screening device according to any one of claims 3 or 4, characterized in that, The guide component is movably connected to the feeding platform, and the guide component has a first rotation direction toward the first guide surface and a second rotation direction toward the second guide surface.

6. The tobacco stem screening device according to claim 5, characterized in that, The rotation angle of the guide component along the first rotation direction is β, and the rotation angle of the guide component along the second rotation direction is λ; 10°≤β≤15°, and / or, 10°≤λ≤15°.

7. The tobacco stem screening device according to claim 3, characterized in that, A scraping mechanism is provided between the guide component and the push plate. The scraping mechanism includes a first support rod located on both sides of the feeding platform and a second support rod connected to the two first support rods respectively. A scraping sleeve is sleeved on the outside of the second support rod. The scraping sleeve can rotate around the second support rod. The guide component and the push plate have the same vertical height and are flush with the lower surface of the scraping sleeve.

8. The tobacco stem screening device according to claim 7, characterized in that, The scraper sleeve is provided with multiple scraper blades, which extend along the length of the scraper sleeve.

9. The tobacco stem screening device according to claim 1, characterized in that, The moisture detector is an infrared moisture meter.

10. The tobacco stem screening device according to claim 1, characterized in that, The detection platform is equipped with a recycling conveyor belt at its bottom. The detection platform includes a leakage area located above the recycling conveyor belt, so that tobacco stems can fall from the leakage area onto the recycling conveyor belt. The detection platform is equipped with a movable cover plate at the leakage area. The movable cover plate has a first position for opening the leakage area and a second position for closing the leakage area. The moisture detector controls the movable cover plate to switch between the first position and the second position through a control unit.

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