Feeding system for recycling undersize tobacco dust

Abstract

This invention relates to the field of tobacco processing equipment technology, and discloses a feeding system for the reuse of undersized tobacco dust, including a feeding device and multiple mobile turnover boxes used in conjunction with the feeding device. The feeding device includes an inclined turnover box support platform, a lifting mechanism for driving the support platform up and down, a pushing drive mechanism located above the support platform, and a turnover box positioning mechanism for controlling the position of the turnover box. Each mobile turnover box has a pushing plate that can move along the length of the box, and a rotatable door panel at the discharge end. During the feeding process, the turnover box moves to the feeding position under the action of the inclined support and positioning mechanism. The pushing drive mechanism drives the pushing plate to move via a traction rod, pushing the material towards the discharge end, and the material pushes the door panel open to discharge the material. This system has a simple structure, enables automatic and continuous feeding of undersized tobacco dust, reduces manual intervention, and improves feeding stability and uniformity of remixing.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing equipment technology, and more specifically to a feeding system for recycling undersized tobacco dust. Background Technology

[0002] In tobacco processing, tobacco leaves typically undergo screening to separate smaller tobacco particles from the main material. This prevents the small particles from becoming finer after shredding and other processes, which could negatively impact the density, weight, draw resistance, and combustion performance of cigarettes, thus ensuring product quality stability. However, from a resource utilization and production cost perspective, the screened tobacco particles still have reuse value and are usually reintegrated into the production line at appropriate stages to improve raw material utilization and reduce material loss.

[0003] In existing technologies, the following methods are commonly used for the re-mixing of undersized tobacco dust: First, collecting and temporarily storing the undersized tobacco dust using a mobile turnover box, and manually pouring the material into the production line during re-mixing; Second, using a pneumatic conveying system in conjunction with the turnover box, with manual operation of the suction port to suck in and transport the material to the re-mixing location; Third, setting up a dedicated storage device to centrally store the undersized tobacco dust, and achieving quantitative re-mixing through a metering device and a pneumatic conveying system; Fourth, using a mobile hopper with a conveying mechanism, sending the material into the production line at the re-mixing location via a bottom conveying structure; Fifth, setting up a tilting device at the re-mixing location, tilting the turnover box to dump the material into the production line.

[0004] While the aforementioned existing technologies can achieve the recycling of undersized tobacco dust to some extent, they still have various shortcomings. For example, manual feeding or manual-pneumatic conveying relies heavily on human intervention, resulting in high labor intensity and potential material contamination, making it difficult to guarantee uniformity of recycling. Pneumatic conveying systems typically involve large equipment investments and complex system structures, and are prone to blockages at the suction inlet, increasing maintenance costs. Centralized storage and secondary conveying methods require multiple sets of equipment, occupying a large space and resulting in complex system layouts. Although mobile silos or tilting equipment can achieve a certain degree of mechanization, they generally suffer from large equipment size, occupy a lot of space, and have discontinuous or unstable operation processes, and may also pose safety hazards during tilting.

[0005] Therefore, how to reduce the degree of human intervention, simplify the equipment structure, reduce the space occupied, and achieve stable, continuous and controllable feeding of undersize tobacco powder while ensuring uniformity of back-mixing has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] To address the problems of excessive manual intervention, complex equipment structure, large space occupation, and discontinuous and unstable feeding in the existing technology of under-screened tobacco dust recycling process, this invention provides a feeding system for under-screened tobacco dust recycling, so as to realize the automated feeding of under-screened tobacco dust, improve the uniformity of recycling, reduce the intensity of manual labor, and take into account the simplicity of structure and the flexibility of equipment layout.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a feeding system for recycling under-screened tobacco dust, comprising a feeding device and multiple mobile turnover boxes used in conjunction with the feeding device; The feeding device includes: Turnover box support platform; The lifting mechanism includes a lifting cylinder and a lifting slider connected to the lifting cylinder. The turnover box support platform is fixedly mounted on the lifting slider. The lifting slider can move up and down along the lifting slide rail mounted on the frame to drive the turnover box support platform to switch between a first height position and a second height position. The material pushing drive mechanism is located above the turnover box support platform and includes a drive device, a traction transmission assembly and a traction rod. The traction rod moves back and forth along the feeding direction under the drive of the drive device. A turnover box positioning mechanism, the turnover box positioning mechanism includes a displacement rod disposed on the turnover box support platform and a displacement cylinder that drives the displacement rod to move along the feeding direction; Each of the plurality of mobile turnover boxes includes: Box; A material pushing assembly is disposed inside the box body. The material pushing assembly includes a material pushing plate and a push rod connected to the material pushing plate. The material pushing plate can move along the length direction of the box body to push the material inside the box body. A door panel is provided at the discharge end of the box body, and the upper end of the door panel is rotatably connected to the box body via a door hinge; The movable turnover box abuts against the displacement rod, and the position of the movable turnover box on the turnover box support platform is controlled by the position change of the displacement rod. During movement, the traction rod cooperates with the push rod to drive the pusher plate to move along the length of the box, so as to push the material inside the box toward the door panel, and the material pushes the door panel to open around the door hinge, thereby discharging the material out of the box. When the turnover box is located at the unloading position of the feeding device, the discharge port of the turnover box is aligned with the receiving port of the production line.

[0008] Preferably, the turnover box support platform has an inclination angle facing the discharge direction, so that the moving turnover box tends to slide along the inclination angle direction under its own weight, and always remains in contact with the displacement rod throughout the entire working process.

[0009] Preferably, the displacement rod is positioned in front of the movement path of the mobile turnover box to prevent it from moving forward when it enters the turnover box support platform. The displacement cylinder drives the displacement rod to move along the feeding direction, thereby driving the movable turnover box that abuts against it to move towards the feeding position; After feeding is completed, the displacement cylinder drives the displacement rod to move in the opposite direction, thereby pushing the mobile turnover box back to its initial position.

[0010] Preferably, the push rod is sleeved on a linear guide rod arranged along the length of the box body via a linear bearing, and the linear guide rod is fixed to the inner wall of the box body; The pusher plate is fixedly connected to one end of the pusher rod, and its outer contour is adapted to the inner wall of the box so as to push the material inside the box as a whole during the movement.

[0011] Preferably, the traction transmission assembly includes a drive roller assembly and a driven roller assembly disposed on the body of the feeding device, and a traction chain wound between the drive roller assembly and the driven roller assembly; The traction rod is fixedly connected to the traction chain and is slidably mounted on the traction slide rail via the traction slider to move stably along the feeding direction; During its forward stroke, the traction rod contacts the end of the push rod and applies a thrust, thereby driving the pusher plate to move.

[0012] Preferably, the mobile turnover box further includes a door panel locking mechanism, the door panel locking mechanism including a door latch rotatably mounted on the box body, the door latch having a locking hook end for cooperating with the door panel to restrict the opening of the door panel and a control end for being subjected to external force; The locking hook end engages with the door panel to lock the door panel in the closed position when not feeding materials.

[0013] Preferably, the feeding device further includes an unlocking drive mechanism, which includes an opening cylinder and a pressure plate connected to the opening cylinder; The pressure plate acts on the control end under the drive of the door opening cylinder, causing the door latch to rotate around its rotation axis, thereby disengaging the lock hook end from the door panel. After the material is pushed out, the door panel returns to the closed position under gravity when it loses material support; the door latch returns to the closed position under gravity after losing the pressure plate, so that the locking hook end re-engages with the door panel to lock the door panel again.

[0014] Preferably, the bottom of the mobile turnover box is provided with multiple casters, including swivel wheels and fixed wheels; the bottom of the box is provided with a positioning plate, which is used to cooperate with the displacement rod to achieve position limitation.

[0015] Preferably, the feeding device further includes a ramp at the entrance end of the turnover box support platform, the ramp being connected to the ground and having guide strips on its surface to guide the moving turnover box into the turnover box support platform.

[0016] Preferably, the feeding drive mechanism is provided with a detection element for detecting the start and end positions of the traction rod; the drive device is an adjustable speed drive device for adjusting the moving speed of the feeding plate to control the feeding rate.

[0017] Compared with existing technologies, the feeding system for recycling under-screened tobacco dust provided by this invention has undergone systematic optimization in structure and operation through the coordinated design of the feeding device and the mobile turnover box, and has the following beneficial effects: This invention, by setting up a pushing drive mechanism that cooperates with the pushing component inside the mobile turnover box, allows the pushing plate to move along the length of the box under external driving force, thereby realizing the overall pushing and output of materials inside the box. Compared with the existing technology that relies on manual material pouring or manual pneumatic conveying, this invention can automatically complete the feeding process, significantly reducing the degree of manual intervention, alleviating labor intensity, and avoiding the instability factors caused by manual operation.

[0018] This invention uses a pusher plate to continuously advance materials, allowing them to be discharged from the container in a controlled manner. During the pushing process, the materials themselves push the door panel open, forming a discharge channel, thus avoiding the problem of instantaneous concentrated discharge that exists in existing tipping or dumping methods. This continuous pushing discharge method facilitates stable and uniform material remixing, improving the stability of the production process and the consistency of product quality.

[0019] In this invention, the material pushing drive mechanism is mounted on the main body of the feeding device. It achieves the pushing action through a traction rod cooperating with a push rod inside the movable turnover box, eliminating the need for a separate power unit on each turnover box. Simultaneously, the door panel is opened by the material itself, eliminating the need for a dedicated door opening drive structure. This design effectively reduces the number of actively driven components in the system, simplifies the overall structure, and lowers equipment manufacturing costs and maintenance complexity.

[0020] This invention utilizes a movable displacement rod on an inclined support platform to ensure that the movable turnover box remains in contact with the displacement rod under gravity. The movement of the turnover box between the feeding position and the initial position is controlled by the positional change of the displacement rod. This method avoids direct driving or clamping of the turnover box, resulting in a simple structure and reliable control, which helps ensure the positional stability of the turnover box during the feeding process.

[0021] This invention, by incorporating a lifting mechanism, allows the support platform for the mobile turnover boxes to switch between different heights. This enables the mobile turnover boxes to spatially connect with external return material conveying equipment during material feeding, while facilitating loading and unloading of the turnover boxes when not feeding. This structure improves the adaptability of the feeding system to different production line layouts and enhances the versatility of the equipment.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] Figure 1 This is a perspective view of the feeding system of the present invention; Figure 2 This is a side view of the feeding system of the present invention; Figure 3 This is a 3D view of the feeding device (excluding the pushing drive mechanism); Figure 4 This is a 3D view of the material pushing drive mechanism. Figure 5 This is a 3D view of the mobile turnover box section.

[0024] Explanation of reference numerals in the attached figures 1- Turnover box support platform; 2-Lifting mechanism, 2a-Lifting cylinder, 2b-Lifting slide rail; 3-Pushing drive mechanism, 3a-Drive device, 3b-Traction transmission assembly, 3c-Traction rod; 4- Turnover box positioning mechanism, 4a- Displacement rod, 4b- Displacement cylinder; 5-Mobile turnover box; 5a-Box body, 5b-Pushing assembly, 5b1-Pushing plate, 5b2-Push rod, 5b3-Linear guide rod, 5c-Door panel, 5d-Cast wheel; 6-Door panel locking mechanism, 6a-Door latch; 7-Unlocking drive mechanism, 7a-Door opening cylinder, 7b-Pressure plate; 8-Slope. Detailed Implementation

[0025] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0026] In this invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself.

[0027] I. Feeding system for recycling screened tobacco dust (see attached document) Figure 1 , 2 ) This embodiment provides a feeding system for the reuse of undersized tobacco dust. The system includes a feeding device and multiple mobile turnover boxes 5 used in conjunction with the feeding device. The feeding device is located on one side of the return material conveying equipment and is used to feed the undersized tobacco dust temporarily stored in the mobile turnover boxes 5 into the return material conveying equipment in a controlled manner. The multiple mobile turnover boxes 5 are used to receive, transfer, and feed the undersized tobacco dust in turn during the production process, thereby realizing the continuous reuse of undersized tobacco dust.

[0028] The feeding device comprises a turnover box support platform 1, a lifting mechanism 2, a pushing drive mechanism 3, and a turnover box positioning mechanism 4. The turnover box support platform 1 supports the mobile turnover box 5 and is inclined along the feeding direction, giving the mobile turnover box 5 a tendency to move along the feeding direction on the support platform. The lifting mechanism 2 drives the turnover box support platform 1 to switch between different height positions to achieve spatial docking between the mobile turnover box 5 and the return material conveying equipment. The pushing drive mechanism 3 is located above the turnover box support platform 1 and drives the pushing component 5b inside the mobile turnover box 5 to push out the material. The turnover box positioning mechanism 4 controls the position of the mobile turnover box 5 on the support platform, allowing it to move orderly between the feeding position and the initial position.

[0029] Specifically, the lifting mechanism 2 includes a lifting drive component mounted on the feeding device frame and a lifting sliding assembly connected thereto. The turnover box support platform 1 is fixed on the lifting sliding assembly. Driven by the lifting drive component, the turnover box support platform 1 can switch between a high position and a low position: in the high position, the discharge end of the mobile turnover box 5 is docked with the return material conveying equipment to facilitate material feeding; in the low position, the turnover box support platform 1 is close to the ground, making it easy for manual pushing or pulling of the mobile turnover box 5.

[0030] The feeding drive mechanism 3 includes a drive device 3a, a traction transmission assembly 3b, and a traction rod 3c extending along the feeding direction. The drive device 3a drives the traction rod 3c to reciprocate along the feeding direction via the traction transmission assembly 3b. During feeding, the traction rod 3c moves forward and cooperates with the push rod 5b2 inside the movable turnover box 5, thereby driving the push plate 5b1 to move along the length of the box 5a, pushing the material inside the box 5a as a whole, causing the material to move towards the discharge end and be discharged; after feeding is completed, the traction rod 3c moves in the opposite direction back to the initial position, preparing for the next feeding.

[0031] The turnover box positioning mechanism 4 includes a displacement rod 4a disposed on the turnover box support platform 1 and a driving component for driving the displacement rod 4a. The displacement rod 4a is disposed on the movement path of the movable turnover box 5 and maintains contact with the movable turnover box 5 under the tilting action of the turnover box support platform 1. By driving the displacement rod 4a to move along the feeding direction, the movable turnover box 5 can be moved on the support platform to enter the feeding position; after feeding is completed, by moving the displacement rod 4a in the opposite direction, the movable turnover box 5 can be pushed back to the initial position, thereby facilitating the manual removal of empty turnover boxes and replacement with new turnover boxes.

[0032] The mobile turnover box 5 is used to carry the undersized tobacco dust and works in conjunction with the feeding device to complete the feeding operation. Each mobile turnover box 5 includes a box body 5a, a pushing assembly 5b disposed inside the box body 5a, and a door plate 5c disposed at the discharge end of the box body 5a. The pushing assembly 5b includes a pushing plate 5b1 and a pushing rod 5b2 connected to the pushing plate 5b1. The pushing plate 5b1 can move along the length of the box body 5a to push the material inside the box body 5a as a whole. The door plate 5c is disposed at the discharge end of the box body 5a, and its upper end is rotatably connected to the box body 5a through a door hinge. In the closed state, it closes the discharge port of the box body 5a. During the pushing process, it opens around the door hinge under the pushing action of the material, thereby forming a discharge channel and allowing the material to be discharged from the box body 5a.

[0033] In actual use, multiple mobile turnover boxes 5 can enter the feeding device in sequence for feeding operations. After one turnover box has finished feeding and exited, the next turnover box can enter the support platform and repeat the above process, thereby realizing the continuous re-mixing of undersized tobacco dust.

[0034] Through the above structural design, this embodiment integrates the mobile turnover box 5 with the feeding device to form an integrated process for material storage, transfer and feeding. At the same time, through the cooperation of structures such as pushing drive, tilting support and displacement positioning, stable output of materials and orderly movement of turnover boxes are achieved.

[0035] II. Lifting Mechanism 2 (see attached document) Figure 3 ) The lifting mechanism 2 is used to drive the turnover box support platform 1 to switch between different height positions, so as to realize the spatial docking between the mobile turnover box 5 and the return material conveying equipment, while taking into account the convenience of equipment loading and unloading operations.

[0036] In this embodiment, the lifting mechanism 2 includes a lifting cylinder 2a, a lifting slider, and a lifting slide rail 2b. The lifting slide rail 2b is fixedly mounted on the frame of the feeding device, and preferably consists of two parallel guide rails arranged vertically. The lifting slider slides in cooperation with the lifting slide rail 2b and can move vertically along the lifting slide rail 2b. The turnover box support platform 1 is fixedly mounted on the lifting slider, so that the turnover box support platform 1 can rise and fall as a whole with the lifting slider.

[0037] The cylinder body of the lifting cylinder 2a is fixed to the frame, and its piston rod is connected to the lifting slider. The lifting slider is driven to move up and down along the lifting slide rail 2b by the extension and retraction of the lifting cylinder 2a. Preferably, the lifting cylinder 2a is located below or to the side of the turnover box support platform 1 to ensure a stable force transmission path and avoid interfering with the entry and exit path of the moving turnover box 5.

[0038] In actual operation, the lifting mechanism 2 has at least two working positions: Low position: The turnover box support platform 1 is at a height close to the ground. At this time, the turnover box 5 can be manually pushed into the turnover box support platform 1 via the ramp 8, or removed from the support platform, which facilitates the loading and unloading of the turnover box. High position: The turnover box support platform 1 is raised to a predetermined height under the drive of the lifting cylinder 2a, so that the discharge end of the mobile turnover box 5 is in a spatial docking state with the return material conveying equipment, so that the material can be smoothly discharged into the return material conveying equipment.

[0039] Preferably, the height of the high position is set according to the installation height of the return material conveying equipment, so that the mobile turnover box 5 can smoothly discharge materials without the need for an additional flow guiding structure when feeding materials; at the same time, the height of the low position can be set close to the ground to reduce the intensity of manual operation.

[0040] Furthermore, to improve the stability of the lifting process, a linear guide rail pair structure or a sliding structure with rollers can be used between the lifting slide rail 2b and the lifting slider to reduce frictional resistance and ensure smooth lifting. In some embodiments, a double-sided symmetrical lifting guide structure can also be provided to prevent the turnover box support platform 1 from tilting or swaying during the lifting process.

[0041] In some optional embodiments, the lifting mechanism 2 may also be provided with a limiting structure to limit the lifting stroke of the turnover box support platform 1. For example, mechanical limiting components may be provided at the upper and lower ends of the lifting slide rail 2b, or the lifting position may be detected by limit switches or electrical detection components to ensure the accuracy and repeatability of the lifting position.

[0042] In addition, in other embodiments, the lifting cylinder 2a can also be replaced by an electric push rod, a screw lifting mechanism or a hydraulic cylinder, etc. As long as it can achieve stable switching between different height positions of the turnover box support platform 1, it is within the protection scope of this invention.

[0043] With the above structural design, the lifting mechanism 2 can reliably lift the turnover box support platform 1 while ensuring a relatively simple structure, so that the mobile turnover box 5 can be spatially connected with external equipment when feeding materials, and can be easily operated manually when not feeding materials, thereby improving the applicability and ease of operation of the entire feeding system.

[0044] III. Turnover Box Positioning Mechanism 4 The turnover box positioning mechanism 4 is used to control the position of the mobile turnover box 5 on the turnover box support platform 1, so that the mobile turnover box 5 can move in an orderly manner between the entry position, the feeding position and the exit position, thereby ensuring the stability and controllability of the feeding process.

[0045] In this embodiment, the turnover box support platform 1 is inclined along the feeding direction, so that the movable turnover box 5 tends to slide along the inclined direction under its own weight. The turnover box positioning mechanism 4 includes a displacement rod 4a and a displacement cylinder 4b that drives the displacement rod 4a to move.

[0046] The displacement rod 4a is positioned along the movement path of the movable turnover box 5, located in front of it in the direction of travel. When the movable turnover box 5 is pushed onto the turnover box support platform 1, it slides forward under the tilting action of the support platform and comes into contact with the displacement rod 4a, thus restricting its further movement. Due to the tilting structure, the movable turnover box 5 remains in contact with the displacement rod 4a throughout the entire process.

[0047] The displacement cylinder 4b is used to drive the displacement rod 4a to perform linear reciprocating motion along the feeding direction. During the feeding preparation stage, the displacement cylinder 4b drives the displacement rod 4a to move away from the inlet. Since the moving turnover box 5 and the displacement rod 4a remain in contact, the movement of the displacement rod 4a will drive the moving turnover box 5 to move synchronously along the inclined direction, thereby allowing the moving turnover box 5 to enter the feeding position. After feeding is completed, the displacement cylinder 4b drives the displacement rod 4a to move in the inlet direction in the opposite direction. The displacement rod 4a pushes the moving turnover box 5 back to the initial position in the opposite direction so that the empty turnover box can be manually removed.

[0048] Through the above structure, the tilting of the turnover box support platform 1 and the limiting effect of the displacement rod 4a achieve unidirectional constraint and position control of the mobile turnover box 5. Compared with directly driving the mobile turnover box 5 or setting up a complex guiding and conveying mechanism, this structure does not require active driving or clamping of the mobile turnover box 5. The forward and backward movement of the turnover box can be achieved simply by controlling the position of the displacement rod 4a. The structure is simple and highly reliable.

[0049] Furthermore, to improve positioning accuracy, a positioning plate can be provided at the bottom of the mobile turnover box 5. The positioning plate is used to cooperate with the end of the displacement rod 4a, so that the displacement rod 4a can stably act on a fixed position when pushing the mobile turnover box 5, thereby avoiding offset or jamming caused by unstable point of action.

[0050] In some embodiments, the end of the displacement rod 4a can be configured as a planar structure, an arc-shaped structure, or a contact structure with a buffer layer to adapt to different types of mobile turnover boxes 5 and reduce contact impact. Preferably, the contact surface of the displacement rod 4a can be provided with a wear-resistant material or an elastic material to improve service life and reduce noise.

[0051] Furthermore, the travel of the displacement rod 4a can be set according to the size of the mobile turnover box 5 and the requirements of the feeding position, so as to ensure that when the mobile turnover box 5 is in the feeding position, its discharge end can be accurately aligned with the return material conveying equipment.

[0052] In some alternative embodiments, a position detection element can be provided on the turnover box support platform 1 to detect whether the movable turnover box 5 has reached the predetermined position. For example, a photoelectric sensor can be provided on the moving path of the displacement rod 4a. When the movable turnover box 5 blocks the photoelectric sensor, it is determined that it has reached the feeding position, thereby providing a control signal for subsequent feeding actions.

[0053] In addition, in other embodiments, the displacement cylinder 4b can also be replaced by a linear drive structure such as an electric push rod or a lead screw drive mechanism. As long as it can drive the displacement rod 4a to move along the feeding direction, it falls within the protection scope of this invention.

[0054] Through the above structural design, the turnover box positioning mechanism 4 makes full use of the self-weight sliding characteristics generated by the inclined support, and combined with the limiting and driving effect of the displacement rod 4a, it realizes the controllable adjustment of the position of the moving turnover box 5, which simplifies the structure and improves the stability and reliability of the feeding process.

[0055] IV. Material Pushing Drive Mechanism 3 (with attachment) Figure 4 ) The pushing drive mechanism 3 is used to drive the pushing component 5b inside the mobile turnover box 5 to push out the material inside the box 5a as a whole.

[0056] In this embodiment, the material pushing drive mechanism 3 is disposed above the turnover box support platform 1, and includes a drive device 3a, a traction transmission assembly 3b, and a traction rod 3c extending along the feeding direction. The drive device 3a is preferably a drive reducer, and its output end is connected to the traction transmission assembly 3b.

[0057] The traction transmission assembly 3b includes a drive roller assembly, a driven roller assembly, and a traction chain wound between the two. The drive roller assembly is connected to the drive device 3a and drives the traction chain to circulate in a predetermined direction under the drive of the drive device 3a; the driven roller assembly is mounted on the frame via bearings and is used to guide and support the traction chain.

[0058] The traction rod 3c is fixedly connected to the traction chain and is mounted on the traction slide rail via a traction slider, enabling the traction rod 3c to perform linear reciprocating motion along the feeding direction under the drive of the traction chain. Preferably, the traction slide rail is arranged along the feeding direction to guide the movement path of the traction rod 3c and improve its movement stability.

[0059] During the feeding process, the drive device 3a starts and drives the traction chain to move, thereby driving the traction rod 3c to move forward along the feeding direction. When the traction rod 3c moves to the position of the movable turnover box 5, its front end contacts the end of the push rod 5b2 inside the turnover box and applies a pushing force to the push rod 5b2, causing the push rod 5b2 to move along the length of the box 5a, thereby driving the pusher plate 5b1 to move synchronously and push the material inside the box 5a as a whole.

[0060] As the pusher plate 5b1 continues to advance, the material inside the housing 5a is gradually pushed towards the discharge end and discharged from the housing 5a under the action of thrust. Preferably, the stroke of the pusher plate 5b1 is set to move from one end of the housing 5a to a position close to the door panel 5c, so as to achieve the basic complete ejection of the material inside the housing 5a.

[0061] After the material is pushed, the drive device 3a reverses its direction, causing the traction chain to drive the traction rod 3c to move in the opposite direction, thus returning the traction rod 3c to its initial position. During the return stroke, the traction rod 3c disengages from the push rod 5b2, and the push plate 5b1 remains in a position close to the discharge end, providing a starting state for the next material pushing process after loading.

[0062] With the above structure, this embodiment adopts a method of separating external drive and internal execution. That is, the pusher drive mechanism 3 on the feeding device provides power, and the pusher plate 5b1 is driven by the contact engagement between the traction rod 3c and the pusher rod 5b2 inside the mobile turnover box 5. This structure eliminates the need for an independent drive device 3a on the mobile turnover box 5, making the structure of the mobile turnover box 5 relatively simple, reducing manufacturing costs, and facilitating the sharing of the same drive mechanism among multiple turnover boxes.

[0063] Furthermore, the engagement between the traction rod 3c and the push rod 5b2 can be an end-face contact structure, or a limiting block or plug-in structure can be provided at its end to improve contact stability and prevent relative slippage. In some embodiments, a buffer structure can be provided at the front end of the traction rod 3c to reduce the impact when it contacts the push rod 5b2.

[0064] Preferably, the drive device 3a is an adjustable speed drive device 3a. By adjusting its output speed, the moving speed of the traction rod 3c can be controlled, thereby adjusting the pushing speed of the pusher plate 5b1 and realizing the adjustment of the material feeding flow rate to meet the needs of different production conditions.

[0065] In addition, in some embodiments, a position detection element can be set on the movement path of the traction rod 3c to detect the starting and ending positions of the traction rod 3c, thereby controlling the pushing process and avoiding insufficient or excessive pushing.

[0066] With the above structural configuration, the material pushing drive mechanism 3 can stably drive the material pushing component 5b in the mobile turnover box 5 to achieve continuous and controllable material pushing, while taking into account the simplicity of the structure and the versatility of the system.

[0067] V. 5 mobile turnover boxes (attached) Figure 5 ) The mobile turnover box 5 is used to carry and transfer the undersized tobacco dust and cooperate with the feeding device to complete the feeding operation. Its structure includes a box body 5a, a pushing component 5b, and a bottom walking structure.

[0068] 5.1 Structure of Box 5a: The box 5a is used to contain the screened tobacco dust, and is preferably a container structure with an open top. Its cross-section can be rectangular or approximately rectangular to facilitate the overall pushing of the material by the pushing component 5b. The inner wall of the box 5a is preferably a relatively flat structure to reduce the retention or accumulation of material during the pushing process.

[0069] One end of the housing 5a is configured as a discharge end, which is equipped with a door panel 5c for closing the opening of the housing 5a when not feeding material, and opening it during feeding to release material. The other end of the housing 5a serves as the pushing start end, used to arrange the initial position of the pushing assembly 5b.

[0070] In some embodiments, the housing 5a may be formed by welding metal sheets, or it may be made of stainless steel or other corrosion-resistant materials to meet the hygiene and durability requirements of the tobacco production environment.

[0071] 5.2 Pushing component 5b: The pushing component 5b is disposed inside the box 5a and is used to push the material inside the box 5a as a whole under the action of the pushing drive mechanism 3.

[0072] Specifically, the pushing assembly 5b includes a pushing plate 5b1 and a pushing rod 5b2 connected to the pushing plate 5b1. The pushing plate 5b1 is disposed inside the box 5a, and its shape is adapted to the inner cavity contour of the box 5a, so that it can form an overall pushing effect on the material during the movement along the length direction of the box 5a.

[0073] The push rod 5b2 is fixedly connected to the push plate 5b1 and extends along the length of the housing 5a. The push rod 5b2 is sleeved on a linear guide rod 5b3 arranged along the length of the housing 5a via a linear bearing. The linear guide rod 5b3 is fixed to the inner wall of the housing 5a or a special support structure, thereby guiding the movement of the push rod 5b2 and enabling the push plate 5b1 to move smoothly in a predetermined direction.

[0074] During the material pushing process, the pusher plate 5b1, driven by the pusher rod 5b2, gradually moves from one end of the housing 5a towards the discharge end, pushing the material inside the housing 5a as a whole towards the discharge end. Preferably, the stroke of the pusher plate 5b1 is set to cover the main space inside the housing 5a, so that the material can be pushed out almost completely, thereby reducing residue.

[0075] In some embodiments, the edge of the pusher plate 5b1 can be configured to fit close to the inner wall of the box 5a, for example by setting an elastic edge, sealing strip or inclined structure, so that the pusher plate 5b1 can fit more effectively against the inner wall of the box 5a during movement, thereby improving the pushing efficiency and reducing material residue.

[0076] 5.3 Bottom Walking Structure: The bottom of the mobile turnover box 5 is equipped with multiple casters 5d for moving the turnover box. Preferably, the casters 5d include swivel casters and directional casters, wherein the swivel casters are located near the operating side for easy manual steering, and the directional casters are located on the other side to improve the stability of linear movement.

[0077] 5.4 Positioning and Fitting Structure: To cooperate with the turnover box positioning mechanism 4 in the feeding device, a positioning plate may be provided on the bottom or side of the movable turnover box 5. The positioning plate is used to contact the displacement rod 4a, thereby pushing or limiting the movable turnover box 5 during the movement of the displacement rod 4a. Preferably, the positioning plate is fixedly set on the bottom of the box body 5a near the discharge end, so that the displacement rod 4a can stably act in a fixed position when in action, thereby avoiding instability caused by direct action on the caster 5d or the edge of the box body 5a.

[0078] 5.5 Coordination with the feeding drive mechanism 3: One end of the push rod 5b2 extends to the outside of the housing 5a or near the outside of the housing 5a, and is used to cooperate with the traction rod 3c in the feeding device. During the feeding process, the traction rod 3c contacts the push rod 5b2 and applies a pushing force, thereby driving the push rod 5b2 and the push plate 5b1 to move.

[0079] In some embodiments, the end of the push rod 5b2 can be configured as a planar structure, a protruding structure, or a structure with a limiter to improve the contact stability with the traction rod 3c; at the same time, the position of the end of the push rod 5b2 can be matched according to the movement path of the traction rod 3c in the feeding device to ensure that the two can reliably contact each other during movement.

[0080] VI. Door panel 5c locking and unlocking mechanism The discharge end of the mobile turnover box 5 is equipped with a door panel 5c and its matching locking and unlocking mechanism, which is used to reliably close the discharge port of the box 5a in the non-feeding state, and to realize controlled opening and automatic reset during the feeding process.

[0081] 6.1 Door Panel 5c: The door panel 5c is located at the discharge end of the housing 5a, and its upper end is rotatably connected to the housing 5a via a door hinge, allowing the door panel 5c to rotate around the door hinge. Preferably, the door hinge is positioned horizontally at the upper part of the discharge end of the housing 5a, so that the door panel 5c hangs vertically downward under gravity in its natural state, thereby closing the discharge port of the housing 5a. In this structure, the opening direction of the door panel 5c is an outward rotation around the door hinge, and its opening process does not rely on a dedicated door opening drive structure, but rather is passively rotated under the action of external force.

[0082] 6.2 Door Panel Locking Mechanism 6: To prevent the door panel 5c from accidentally opening due to material compression or shaking during handling or waiting for feeding, the mobile turnover box 5 is equipped with a door panel locking mechanism 6. Specifically, the door panel locking mechanism 6 includes a door latch 6a rotatably mounted on the side wall of the box body 5a. The door latch 6a is connected to the box body 5a via a rotating shaft, allowing it to rotate around the shaft. The door latch 6a has a locking hook end and a control end, wherein the locking hook end is used to cooperate with the door panel 5c to restrict the opening of the door panel 5c, and the control end is used to be driven by external force to rotate the door latch 6a.

[0083] Preferably, the door panel 5c is provided with a structure that cooperates with the lock hook end, such as a gap for the lock hook end to pass through or an edge structure for engaging with it, so that the lock hook end can be fastened to the door panel 5c in the locked state, thereby fixing the door panel 5c in the closed position. In the non-feeding state, the door latch 6a remains in the locked position under the action of gravity, and its lock hook end cooperates with the door panel 5c, thereby restricting the rotation of the door panel 5c and preventing material leakage.

[0084] 6.3 Unlocking Drive Mechanism 7: To unlock the door panel 5c before feeding, the feeding device is equipped with an unlocking drive mechanism 7. The unlocking drive mechanism 7 includes an opening cylinder 7a and a pressure plate 7b connected to the opening cylinder 7a. The pressure plate 7b is positioned above or corresponding to the control end of the door latch 6a, and can move downwards under the drive of the opening cylinder 7a, acting on the control end. During the unlocking process, the opening cylinder 7a drives the pressure plate 7b downwards, causing the pressure plate 7b to press against the control end of the door latch 6a, thereby driving the door latch 6a to rotate around its axis, causing the lock hook end to disengage from the door panel 5c, thus unlocking the door panel 5c. It should be noted that during the unlocking process, the pressure plate 7b only acts on the door latch 6a to disengage it from the locked state, and does not directly apply an opening force to the door panel 5c; the door panel 5c remains closed during this time.

[0085] 6.4 Passive opening process of door panel 5c: After door panel 5c is unlocked, the pusher drive mechanism 3 drives the pusher plate 5b1 forward, thereby pushing the material in the box 5a towards the discharge end. After the material reaches the discharge end, the material exerts a pushing force on door panel 5c, causing door panel 5c to rotate around the door hinge under the action of the pushing force and gradually open, thereby forming a discharge channel, allowing the material to be discharged from the box 5a.

[0086] It can be seen that the opening of the door panel 5c is not directly driven by the unlocking drive mechanism 7, but is achieved by the thrust generated by the material under the action of pushing, that is, the material itself is used as the power source for opening the door panel 5c.

[0087] 6.5 Door Panel 5c Reset and Relocking: After feeding is completed, as the pusher plate 5b1 stops moving forward, there is no more material in the box 5a exerting a pushing force on the door panel 5c. At this time, the door panel 5c rotates in the opposite direction around the door hinge under its own gravity and resets to the closed position. Simultaneously, the door opening cylinder 7a drives the pressure plate 7b to move upward, causing the pressure plate 7b to disengage from the control end of the door latch 6a. After the external force is lost, the door latch 6a rotates in the opposite direction around its axis under gravity, causing the locking hook end to re-engage with the door panel 5c, thereby locking the door panel 5c back into the closed state. Through the above structure, the door panel 5c can automatically reset and relock after each feeding, without additional control or manual intervention, thus forming a complete closed-loop working process.

[0088] In some embodiments, the mating structure between the door latch 6a and the door panel 5c can take different forms, such as a latch and flange mating, a plug-in mating, or a snap-fit ​​mating. As long as reliable locking of the door panel 5c can be achieved, it falls within the protection scope of this invention.

[0089] In some embodiments, a buffer structure may be provided between the control end of the door latch 6a and the pressure plate 7b to reduce the impact when the pressure plate 7b is in action; a damping structure may also be provided at the rotation connection of the door panel 5c to control its opening and closing speed.

[0090] In addition, in other embodiments, the unlocking drive mechanism 7 may also use an electric push rod or other linear drive device to replace the cylinder structure. As long as it can achieve the pressing action on the control end of the door latch 6a, it is within the protection scope of this invention.

[0091] VII. Work Process In practical use, the feeding system for recycling undersized tobacco dust described in this embodiment achieves continuous recycling of undersized tobacco dust through the cooperation of the feeding device and multiple mobile turnover boxes 5. Its working process is as follows: First, in the initial state, the turnover box support platform 1 is in a low position, which facilitates the entry and exit of the movable turnover box 5; the traction rod 3c is in the starting position; the displacement rod 4a is located near the entrance; the door panel 5c of the movable turnover box 5 is closed and locked under the action of the door panel locking mechanism 6.

[0092] When feeding is required, the operator pushes the mobile turnover box 5, which is filled with screened tobacco powder, along the ground and enters the turnover box support platform 1 via the ramp 8. Under the tilting action of the support platform, the mobile turnover box 5 tends to slide in the feeding direction and stops moving forward after contacting the displacement rod 4a, thus completing the initial positioning.

[0093] Subsequently, the turnover box positioning mechanism 4 is activated, and the displacement cylinder 4b drives the displacement rod 4a to move along the feeding direction. Since the moving turnover box 5 and the displacement rod 4a are in contact, the movement of the displacement rod 4a drives the moving turnover box 5 to move forward in the inclined direction, so that it enters the feeding position and the discharge end is aligned with the feeding position of the return material conveying equipment.

[0094] Based on this, the lifting mechanism 2 is activated, driving the turnover box support platform 1 to rise to a high position, so that the discharge end of the mobile turnover box 5 and the return material conveying equipment are connected in space.

[0095] When the mobile turnover box 5 reaches the feeding position, the unlocking drive mechanism 7 is activated, and the door opening cylinder 7a drives the pressure plate 7b to move downward, pressing the control end of the door latch 6a, causing the door latch 6a to rotate, thereby disengaging the lock hook end from the door panel 5c and completing the unlocking of the door panel 5c. At this time, the door panel 5c remains in the closed state.

[0096] Subsequently, the material pushing drive mechanism 3 is started, and the drive device 3a drives the traction rod 3c to move forward along the feeding direction. When the traction rod 3c contacts the push rod 5b2 in the mobile turnover box 5, it pushes the push rod 5b2 and the push plate 5b1 to move along the length of the box 5a, thereby pushing the material in the box 5a as a whole towards the discharge end.

[0097] As the material moves toward the discharge end, it exerts a pushing force on the door plate 5c, causing the door plate 5c to rotate around the door hinge and gradually open, thus forming a discharge channel. Under the continuous pushing of the pusher plate 5b1, the material is gradually discharged into the return material conveying equipment, achieving a stable and continuous feeding process.

[0098] When the pusher plate 5b1 moves to the end of its stroke, the material in the box 5a has been basically pushed out. The pusher drive mechanism 3 stops forward drive and runs in reverse, so that the traction rod 3c returns to the starting position.

[0099] After the material is pushed out, since there is no more material in the box 5a to exert a pushing force on the door panel 5c, the door panel 5c returns to the closed position around the door hinge under its own gravity. At the same time, the door opening cylinder 7a drives the pressure plate 7b to move upward, and the door latch 6a returns to its original position under gravity, so that the lock hook end re-engages with the door panel 5c, thereby realizing the re-locking of the door panel 5c.

[0100] Subsequently, the turnover box positioning mechanism 4 reverses its action, and the displacement cylinder 4b drives the displacement rod 4a to move towards the inlet direction, thereby pushing the moving turnover box 5 back to the initial position along the tilt direction.

[0101] Finally, the lifting mechanism 2 drives the turnover box support platform 1 to descend to the low position. The operator pulls the empty mobile turnover box 5 out of the support platform and pushes in the new filling turnover box, repeating the above process.

[0102] By sequentially replacing and recycling multiple mobile turnover boxes 5, continuous re-feeding of undersized tobacco dust can be achieved, thereby improving production efficiency and ensuring the stability of the feeding process.

[0103] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0104] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0105] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A feeding system for recycling screened tobacco dust, characterized in that, Includes a feeding device and multiple mobile turnover boxes (5) used in conjunction with the feeding device; The feeding device includes: Turnover box support platform (1); The lifting mechanism (2) includes a lifting cylinder (2a) and a lifting slider connected to the lifting cylinder (2a). The turnover box support platform (1) is fixedly installed on the lifting slider. The lifting slider can move up and down along the lifting slide rail (2b) installed on the frame to drive the turnover box support platform (1) to switch between a first height position and a second height position. The material pushing drive mechanism (3) is located above the turnover box support platform (1) and includes a drive device (3a), a traction transmission assembly (3b) and a traction rod (3c). The traction rod (3c) moves back and forth along the feeding direction under the drive of the drive device (3a). The turnover box positioning mechanism (4) includes a displacement rod (4a) disposed on the turnover box support platform (1) and a displacement cylinder (4b) for driving the displacement rod (4a) to move along the feeding direction. Each of the plurality of said mobile turnover boxes (5) includes: Box (5a); A material pushing assembly (5b) is disposed inside the box (5a). The material pushing assembly (5b) includes a material pushing plate (5b1) and a push rod (5b2) connected to the material pushing plate (5b1). The material pushing plate (5b1) can move along the length direction of the box (5a) to push the material inside the box (5a). A door panel (5c) is disposed at the discharge end of the box body (5a), and the upper end of the door panel (5c) is rotatably connected to the box body (5a) through a door hinge; The movable turnover box (5) abuts against the displacement rod (4a), and the position of the movable turnover box (5) on the turnover box support platform (1) is controlled by the position change of the displacement rod (4a); During the movement, the traction rod (3c) cooperates with the push rod (5b2) to drive the pusher plate (5b1) to move along the length of the box (5a) to push the material inside the box (5a) toward the door panel (5c), and the material pushes the door panel (5c) to open around the door hinge, thereby discharging the material out of the box (5a). When the turnover box is located at the unloading position of the feeding device, the discharge port of the turnover box is aligned with the receiving port of the production line.

2. The feeding system according to claim 1, characterized in that, The turnover box support platform (1) has an inclination angle toward the discharge direction, so that the moving turnover box (5) tends to slide along the inclination angle under its own weight, and always remains in contact with the displacement rod (4a) throughout the entire working process.

3. The feeding system according to claim 1, characterized in that, The displacement rod (4a) is positioned in front of the movement path of the mobile turnover box (5) to block its continued movement when the mobile turnover box (5) enters the turnover box support platform (1). The displacement cylinder (4b) drives the displacement rod (4a) to move along the feeding direction, thereby driving the movable turnover box (5) that abuts against it to move to the feeding position; After feeding is completed, the displacement cylinder (4b) drives the displacement rod (4a) to move in the opposite direction, thereby pushing the mobile turnover box (5) back to the initial position.

4. The feeding system according to claim 1, characterized in that, The push rod (5b2) is sleeved on the linear guide rod (5b3) arranged along the length direction of the box (5a) via a linear bearing, and the linear guide rod (5b3) is fixed to the inner wall of the box (5a); The pusher plate (5b1) is fixedly connected to one end of the push rod (5b2), and its outer contour is adapted to the inner wall of the box (5a) so as to push the material in the box (5a) as a whole during the movement.

5. The feeding system according to claim 1, characterized in that, The traction drive assembly (3b) includes a drive active roller assembly and a drive passive roller assembly disposed on the body of the feeding device, and a traction chain wound between the drive active roller assembly and the drive passive roller assembly; The traction rod (3c) is fixedly connected to the traction chain and is slidably mounted on the traction slide rail via the traction slider so as to move stably along the feeding direction; The traction rod (3c) contacts the end of the push rod (5b2) during its forward stroke and applies a thrust, thereby driving the pusher plate (5b1) to move.

6. The feeding system according to claim 1, characterized in that: The mobile turnover box (5) also includes a door panel locking mechanism (6), which includes a door latch (6a) rotatably mounted on the box body (5a). The door latch (6a) has a locking hook end for cooperating with the door panel (5c) to restrict the opening of the door panel (5c) and a control end for being subjected to external force. The locking hook end engages with the door panel (5c) to lock the door panel (5c) in the closed position when not feeding materials.

7. The feeding system according to claim 6, characterized in that: The feeding device also includes an unlocking drive mechanism (7), which includes an opening cylinder (7a) and a pressure plate (7b) connected to the opening cylinder (7a). The pressure plate (7b) acts on the control end under the drive of the door opening cylinder (7a), causing the door latch (6a) to rotate around its rotation axis, thereby disengaging the lock hook end from the door panel (5c); After the material is pushed out, the door panel (5c) returns to the closed position under gravity when it loses material support; the door latch (6a) returns to the closed position under gravity after losing the function of the pressure plate (7b), so that the locking hook end re-engages with the door panel (5c) to lock the door panel (5c) again.

8. The feeding system according to claim 1, characterized in that: The bottom of the mobile turnover box (5) is provided with multiple casters (5d), including swivel wheels and directional wheels; the bottom of the box body (5a) is provided with a positioning plate, which is used to cooperate with the displacement rod (4a) to achieve position limitation.

9. The feeding system according to claim 1, characterized in that: The feeding device also includes a ramp (8) set at the entrance end of the turnover box support platform (1). The ramp (8) is connected to the ground and has guide strips on its surface to guide the moving turnover box (5) into the turnover box support platform (1).

10. The feeding system according to claim 1, characterized in that: The feeding drive mechanism (3) is equipped with a detection element for detecting the starting and ending positions of the traction rod (3c); the drive device (3a) is an adjustable speed drive device (3a) for adjusting the moving speed of the feeding plate (5b1) to control the feeding rate.

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