Screening device

Abstract

The invention relates to the technical field of tobacco production, in particular to a screening device. The adjusting mechanism comprises a support, a rotating piece and a plurality of sliding blocks, the rotating piece is rotationally connected to the support, the sliding blocks are slidably connected to the support in the radial direction, the rotating piece is provided with a plurality of guide holes, the guide holes are in an arc shape, and the guide holes extend from the edge of the outer ring of the rotating piece to the inner ring of the rotating piece. The two ends of each screening rod are connected to one ends of the corresponding sliding blocks respectively, the other ends of the sliding blocks are arranged in the guide holes in a sliding mode and can move along the hole walls of the guide holes so that the distance between every two adjacent screening rods can be adjusted, and the detection system is used for detecting the distance between every two adjacent screening rods. The adjusting mechanism can adjust the distance between the two screening rods, stepless adjustment of the distance between the screening cage net is achieved, then the screening cage net is matched with the tobacco stem turning heads of different sizes, the tobacco stem turning heads in tobacco stem raw materials can be effectively removed, the influence of the tobacco stem turning heads on the cut stem process quality is eliminated, and the cut stem quality is improved.

Description

Technical Field

[0001] This invention relates to the field of tobacco production technology, and in particular to a screening device. Background Technology

[0002] The problem of tobacco stem bends has always been one of the difficulties in improving the quality of cigarette products for cigarette manufacturers. By setting up an online tobacco stem bend removal device to remove the bends mixed in with the tobacco stems, the stability of the processing equipment during the stem-to-cigarette process can be improved, the processing quality of the stems and the expansion effect of the stems can be enhanced, which will play an important role in effectively reducing the tar content of cigarettes, improving the combustibility of cigarettes, and reducing the consumption of tobacco raw materials.

[0003] However, the tobacco stems used by cigarette factories contain many stem ends from various origins, resulting in inconsistent stem diameters. Existing screening systems can only screen out the smaller diameter stem ends, causing the larger diameter stem ends to accumulate at the head and tail of the conveyor, affecting stable equipment operation and easily clogging the stem pressing machine. Furthermore, the low fiber density within the stem ends makes them easily crushed, affecting the quality of the shredded stems, reducing the stem expansion effect, and lowering the stem filling value.

[0004] Therefore, there is an urgent need for a screening device to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a screening device that can effectively remove the tobacco stem ends from the raw tobacco stems and eliminate their impact on the quality of the stem processing.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A screening device includes a screening cage and a detection system. The screening cage includes two adjusting mechanisms and a plurality of screen rods, which are spaced apart circumferentially. Each adjusting mechanism includes a support, a rotating component, and a plurality of sliders, which are arranged in a one-to-one correspondence with the screen rods. The rotating component is rotatably connected to the support, and the sliders are radially slidably connected to the support. The rotating component has a plurality of guide holes, which are arranged in a one-to-one correspondence with the screen rods. The guide holes are arc-shaped and extend from the outer edge of the rotating component to the inner edge. Both ends of each screen rod are connected to one end of a corresponding slider, and the other end of the slider is slidably disposed within the guide hole and can move along the hole wall to adjust the spacing between two adjacent screen rods. The detection system is used to detect the spacing between two adjacent screen rods.

[0008] As a preferred embodiment of the screening device described above, the support is provided with a plurality of sliding grooves at intervals along the circumference, and the plurality of sliding grooves are provided in a one-to-one correspondence with a plurality of screen rods. The sliding grooves extend radially along the support, and the slider is slidably disposed within the sliding grooves.

[0009] As a preferred technical solution of the above-mentioned screening device, the adjustment mechanism further includes a plurality of rollers, which are arranged one-to-one with a plurality of sliders. The rollers are rotatably connected to the other end of the sliders, and the rollers are located in the guide hole, with the rollers abutting against the wall of the guide hole.

[0010] As a preferred technical solution of the above-mentioned screening device, the adjustment mechanism further includes a plurality of rotating shafts, each of which is arranged in a corresponding manner with a plurality of rollers. The rotating shafts are installed at the other end of the slider, and the rollers are rotatably sleeved on the rotating shafts.

[0011] As a preferred embodiment of the screening device described above, the screening device further includes a housing, in which the screening cage and the detection system are both housed.

[0012] As a preferred technical solution of the above-mentioned screening device, the detection system includes a support base and a camera module. The support base is disposed inside the housing, and the camera module is installed on the support base.

[0013] As a preferred embodiment of the screening device described above, the screening device further includes a conveyor, which passes through the housing and is located below the screening cage.

[0014] As a preferred embodiment of the screening device described above, the screening device further includes a collection vehicle, which is located at the discharge port of the screening cage and is used to collect the bends of tobacco stems.

[0015] As a preferred technical solution of the above-mentioned screening device, the distance between two adjacent screen rods is L, wherein 6mm≤L≤10mm.

[0016] As a preferred embodiment of the screening device described above, the adjusting mechanism further includes a connecting block, a connecting rod assembly, and a connecting shaft. The rotating component has a protruding protrusion. The connecting block is rotatably connected to the support. One end of the connecting rod assembly is rotatably connected to the eccentric portion of the connecting block. The two ends of the connecting shaft are respectively connected to one end of the connecting rod assembly and the protrusion.

[0017] Beneficial effects of this invention:

[0018] This invention provides a screening device. The screening device includes a screening cage and a detection system. The screening cage includes two adjusting mechanisms and several screen rods, which are spaced apart circumferentially. The adjusting mechanisms include a support, a rotating component, and several sliders, each corresponding to one of the screen rods. The rotating component is rotatably connected to the support, and the sliders are radially slidably connected to the support. The rotating component has several guide holes, each corresponding to one of the screen rods. The guide holes are arc-shaped and extend from the outer edge of the rotating component to its inner edge. Each end of a screen rod is connected to one end of a corresponding slider, and the other end of the slider slides within the guide hole and can move along the hole wall to adjust the distance between adjacent screen rods. The detection system is used to detect the distance between adjacent screen rods. Compared to existing technologies, the adjusting mechanisms can adjust the distance between two screen rods, achieving stepless adjustment of the screening cage mesh spacing. This allows for adaptation to different sizes of tobacco stem bends, effectively removing tobacco stem bends from the raw tobacco stems, eliminating their impact on the quality of the tobacco stem processing, and improving the quality of the tobacco stems. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the first structure of the screening cage provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the second structure of the screening cage provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the bracket provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the rotating component provided in an embodiment of the present invention.

[0024] In the picture:

[0025] 1. Screen rod; 2. Support; 21. Slide groove; 3. Rotating component; 31. Guide hole; 32. Protrusion; 4. Sliding block; 5. Roller; 6. Rotating shaft; 7. Connecting block; 8. Linkage assembly; 9. Connecting shaft. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0027] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical 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 invention based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0030] like Figures 1 to 4 As shown, the present invention provides a screening device. The screening device includes a screening cage and a detection system. The screening cage includes two adjusting mechanisms and a plurality of screen rods 1.

[0031] Specifically, a number of sieve rods 1 are arranged at circumferential intervals. The adjustment mechanism includes a support 2, a rotating component 3, and a number of sliders 4. The sliders 4 are arranged one-to-one with the sieve rods 1. The rotating component 3 is rotatably connected to the support 2, and the sliders 4 are radially slidably connected to the support 2. The rotating component 3 is provided with a number of guide holes 31, which are arranged one-to-one with the sieve rods 1. The guide holes 31 are arc-shaped and extend from the outer edge of the rotating component 3 to the inner edge. The two ends of the sieve rods 1 are respectively connected to one end of the corresponding sliders 4. The other end of the sliders 4 is slidably disposed in the guide holes 31 and can move along the hole wall of the guide holes 31 to adjust the distance between two adjacent sieve rods 1. The detection system is used to detect the distance between two adjacent sieve rods 1. Compared with the prior art, the adjustment mechanism can adjust the distance between two sieve rods 1, realize stepless adjustment of the mesh spacing of the screening cage, and thus adapt to tobacco stem bends of different sizes. It can effectively remove tobacco stem bends from the tobacco stem raw materials, eliminate their impact on the quality of the stem processing, and improve the quality of the stems.

[0032] Furthermore, the distance between two adjacent screen rods 1 is L, where 6mm ≤ L ≤ 10mm. Specifically, the screen rod 1 is a steel pipe, and several steel pipes are evenly spaced along the circumference, and the distance between two adjacent steel pipes can be steplessly adjusted within the range of 6mm to 10mm to improve the screening effect.

[0033] Optionally, the support 2 is provided with a plurality of sliding grooves 21 at intervals along the circumference, and the plurality of sliding grooves 21 are provided one-to-one with a plurality of screen rods 1. The sliding grooves 21 extend radially along the support 2, and the slider 4 is slidably disposed in the sliding grooves 21. This arrangement allows the slider 4 to move along the sliding grooves 21, prevents the slider 4 from deviating, and improves the accuracy of the movement of the screen rods 1.

[0034] Optionally, the adjustment mechanism further includes a plurality of rollers 5, which are arranged one-to-one with a plurality of sliders 4. The rollers 5 are rotatably connected to the other end of the sliders 4, and the rollers 5 are located inside the guide hole 31, abutting against the wall of the guide hole 31. With this arrangement, the rollers 5 rotate and move along the wall of the guide hole 31, which can reduce the wear between the rollers 5 and the wall of the guide hole 31 and improve the stability of the adjustment mechanism.

[0035] Furthermore, the adjustment mechanism also includes several rotating shafts 6, which are arranged one-to-one with several rollers 5. The rotating shafts 6 are installed at the other end of the slider 4, and the rollers 5 are rotated and sleeved on the rotating shafts 6 to improve the stability of the rollers 5.

[0036] Optionally, the adjusting mechanism further includes a connecting block 7, a connecting rod assembly 8, and a connecting shaft 9. The rotating member 3 has a protruding protrusion 32. The connecting block 7 is rotatably connected to the bracket 2. One end of the connecting rod assembly 8 is rotatably connected to the eccentric portion of the connecting block 7. Both ends of the connecting shaft 9 are respectively connected to one end of the connecting rod assembly 8 and the protrusion 32. This configuration allows the roller 5 to reciprocate within the guide hole 31, achieving stepless adjustment of the screen mesh spacing. Further, the connecting block 7 is an eccentric wheel.

[0037] Optionally, the screening device also includes a housing, with the screening cage and detection system all housed within the housing. Specifically, the screening device further includes a dust collection system, which is located within the housing and is installed above the front and rear ends of the screening cage to prevent dust pollution.

[0038] Optionally, the screening device also includes a conveyor, which passes through the housing and is located below the screening cage. With this configuration, qualified tobacco stems fall through the gaps in the screen tubes and enter the tobacco stem conveyor coaxially positioned below the screening cage, while unqualified tobacco stems remain inside the screening cage.

[0039] Furthermore, the screening device also includes a collection cart, which is located at the discharge port of the screening cage and is used to collect the bends in the tobacco stems. Specifically, the discharge port for the bends in the tobacco stems is located at the tail of the screening cage, and the discarded bends in the tobacco stems enter the collection cart through the discharge pipe.

[0040] Optionally, the detection system includes a support base and a camera module. The support base is housed within the enclosure, and the camera module is mounted on the support base. Specifically, the detection system also includes a controller. The detection method of the system includes: 1. Building a tobacco stem bend detection platform; 2. Collecting images of tobacco stem bends from multiple varieties to construct a tobacco stem bend detection model dataset and performing image preprocessing such as data augmentation and data cleaning; 3. Configuring a tobacco stem bend detection training environment; 4. Constructing a tobacco stem bend detection model (HTSDet). The constructed model is based on and improved from the YOLOv8 network. The backbone network in the YOLOv8 network is replaced with the efficientViT structure. In the SPPF module, the ECA attention mechanism is integrated, and SlideLoss and F are introduced. 5. The established dataset is used to train and validate the tobacco stem bend detection model, and the corresponding detection model weights are obtained. 6. The image of the tobacco stem bend to be detected is input into the detection model HTSDet for target detection and the phenotypic information of the tobacco stem bend is output. 7. The number of stems and phenotypic information in the image are statistically analyzed, and the phenotypic features of the stems are output. After the detection system processes and feeds back the phenotypic information, it is used for the intelligent adjustment of the spacing of the screening cage for tobacco stem bends. This method effectively improves the accuracy of stem detection and also improves the detection efficiency. By integrating multi-scale image information, the performance of the stem detection model is effectively improved.

[0041] Furthermore, when the tobacco stems fall into the conveyor through the hopper, the detection system above the conveyor detects the average diameter of the bends in the batch of tobacco stems. This data is transmitted to the screening cage signal controller. After receiving the diameter information of the tobacco stem bends, the screening cage controls the connecting block 7 via a servo motor to adjust the gap between the screen tubes in the screening cage, thus achieving variable diameter control of the screening cage. Therefore, qualified tobacco stems within the gap range of the screening cage mesh can fall through the gaps and enter the tobacco stem conveyor coaxially arranged below the screening cage for the next process. In this embodiment, the controller can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control each component to achieve its function.

[0042] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A screening device, characterized in that, The application relates to a screening cage and a detection system, the screening cage comprising two adjusting mechanisms and a plurality of screen rods (1), the plurality of screen rods (1) being arranged at intervals along a circumference, the adjusting mechanism comprising a support (2), a rotating piece (3) and a plurality of sliding blocks (4), the plurality of sliding blocks (4) being arranged in one-to-one correspondence with the plurality of screen rods (1), the rotating piece (3) being rotationally connected to the support (2), the sliding blocks (4) being slidingly connected to the support (2) along a radial direction, the rotating piece (3) being provided with a plurality of guide holes (31), the plurality of guide holes (31) being arranged in one-to-one correspondence with the plurality of screen rods (1), the guide holes (31) being arc-shaped, and the guide holes (31) extending from an outer ring edge of the rotating piece (3) to an inner ring of the rotating piece (3), two ends of the screen rod (1) being respectively connected to one end of the corresponding sliding block (4), the other end of the sliding block (4) being slidingly arranged in the guide hole (31) and being capable of moving along a hole wall of the guide hole (31) to adjust the interval between two adjacent screen rods (1), and the detection system being used for detecting the interval between two adjacent screen rods (1). The support (2) is provided with a plurality of sliding grooves (21) at intervals along a circumferential direction, the plurality of sliding grooves (21) being arranged in one-to-one correspondence with the plurality of screen rods (1), the sliding grooves (21) extending along a radial direction of the support (2), and the sliding blocks (4) being slidingly arranged in the sliding grooves (21).

2. A screening device according to claim 1, characterized in that The adjusting mechanism further comprises a plurality of rollers (5), the plurality of rollers (5) being arranged in one-to-one correspondence with the plurality of sliding blocks (4), the rollers (5) being rotationally connected to the other end of the sliding blocks (4) and being located in the guide holes (31), and the rollers (5) abutting against the hole walls of the guide holes (31).

3. A screening device according to claim 1, wherein The adjusting mechanism further comprises a plurality of rotating shafts (6), the plurality of rotating shafts (6) being arranged in one-to-one correspondence with the plurality of rollers (5), the rotating shafts (6) being mounted to the other end of the sliding blocks (4), and the rollers (5) being rotationally sleeved on the rotating shafts (6).

4. A screening apparatus according to claim 3, wherein, The screening device further comprises a box body, and the screening cage and the detection system are arranged in the box body.

5. A screening device according to claim 1, characterized in that The detection system comprises a support base and a camera module, the support base being arranged in the box body, and the camera module being mounted to the support base.

6. A screening device according to claim 5, wherein The screening device further comprises a conveyor, the conveyor being arranged in the box body and being located below the screening cage.

7. A screening device according to claim 5, wherein The screening device further comprises a collection vehicle, the collection vehicle being arranged at a discharge port of the screening cage and being used for collecting tobacco stem knobs.

8. A screening device according to claim 5, wherein The interval between two adjacent screen rods (1) is L, wherein 6mm<=L<=10mm.

9. A screening device according to any one of claims 1-8, characterized in that ​ 10. A screening device according to any one of claims 1-8, characterized in that The adjusting mechanism further comprises a connecting block (7), a connecting rod assembly (8) and a connecting shaft (9), the rotating member (3) is provided with a protruding block (32), the connecting block (7) is rotationally connected to the support (2), one end of the connecting rod assembly (8) is rotationally connected to an eccentric part of the connecting block (7), and two ends of the connecting shaft (9) are respectively connected to one end of the connecting rod assembly (8) and the protruding block (32).

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