Double-layer uniform blanking elevator and control method

Abstract

The invention discloses a double-layer uniform blanking elevator and a control method, and relates to the technical field of lifting and conveying. The double-layer conveying channel is arranged below the blanking port, and the conveying surfaces of an upper-layer channel and a lower-layer channel of the double-layer conveying channel are parallel to the horizontal plane; wherein in the working state, the material guide plate is configured to periodically rotate between a first position and a second position; when in the first position, the extension direction of the plate surface vertically points to the conveying surface of the lower-layer channel; and when in the second position, the extension direction of the plate surface obliquely points to the conveying surface of the upper-layer channel. The rotatable material guide plate is arranged at the material falling opening so as to be matched with the double-layer conveying channel arranged below, the material guide plate can periodically rotate between the two working positions pointing to the upper channel and the lower channel, and therefore the position of a material falling point is changed from a fixed position to an alternate switching position; and the materials are continuously and uniformly distributed to the double-layer conveying channel, so that the conveying quantity of the materials is increased.

Description

Technical Field

[0001] This application relates to the field of lifting and conveying technology, specifically to a double-layer uniform material discharge elevator and its control method. Background Technology

[0002] In the process of large-scale cigarette production, multiple continuous processes such as rolling, packaging, and testing are involved. Due to factors such as fluctuations in equipment operating precision, abnormal material conveying conditions, and deviations in process parameters, a large number of substandard cigarettes that do not meet process standards are inevitably produced. The tobacco filling in these substandard cigarettes has undergone precise blending in the tobacco processing process, meeting core quality indicators such as moisture content, filling value, and formula components. It is considered qualified tobacco and has high recycling value. Directly discarding substandard cigarettes would not only result in a serious waste of raw tobacco materials and a significant increase in production costs, but also increase the environmental pressure on solid waste treatment, contradicting the tobacco industry's development needs for green production and cost reduction and efficiency improvement.

[0003] To recover qualified tobacco from defective cigarettes, traditional technology typically uses a lifting device paired with a horizontal conveyor to transport the defective cigarettes to a processing facility for recycling. However, the guiding structure of traditional lifting and conveying equipment is usually fixed, which cannot change the drop point and can only accommodate the feeding requirements of a single-layer horizontal conveyor, thus limiting the material conveying capacity. Summary of the Invention

[0004] The main objective of this application is to provide a double-layer uniform material discharge elevator and control method, which aims to solve the technical problem that the material guiding structure of traditional lifting and conveying equipment is usually a fixed structure, which cannot change the position of the material discharge point and can only adapt to the feeding needs of a single-layer horizontal conveying channel, thus resulting in limited material conveying capacity.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A double-layer uniform material feeding elevator, comprising:

[0007] The elevator has a guide plate rotatably installed at the discharge port at its end;

[0008] The double-layer conveying channel is located below the material drop outlet, and the conveying surfaces of both the upper and lower channels are parallel to the horizontal plane.

[0009] In the working state, the guide plate is configured to rotate periodically between a first position and a second position; when it is in the first position, the extension direction of its plate surface points perpendicularly to the conveying surface of the lower channel; when it is in the second position, the extension direction of its plate surface points obliquely to the conveying surface of the upper channel.

[0010] Optionally, the guide plate further has a third position, and the second position is located between the first position and the third position. The maximum rotation range of the guide plate is configured from the first position to the third position, wherein the first position and the third position are arranged symmetrically about the rotation axis of the guide plate at 180°.

[0011] Optionally, the hoist includes:

[0012] The frame has pulley shafts mounted at its beginning and end, with motors connected to the pulley shafts and conveyor belts wound around them. Each end of the pulley shaft is fitted with a first bearing and a first bearing housing, with the first bearings embedded in mounting holes in the first bearing housings. The first bearing housings are fixed to the frame by first screws. The pulley shaft passes through the inner ring of the first bearing, and an annular retaining circumference groove is formed on its outer circumference. A retaining circumference is engaged in the annular retaining circumference groove, and the retaining circumference abuts against the end face of the inner ring of the first bearing.

[0013] Optionally, the discharge port includes:

[0014] The hopper has a rotating shaft mounted on it. The guide plate is connected to the rotating shaft by a second screw. A second bearing and a second bearing seat are fitted onto one end of the rotating shaft along its length. The second bearing is embedded in the mounting hole of the second bearing seat. The second bearing seat is fixed to one side of the hopper by a third screw.

[0015] Optionally, the shaft is connected to a bushing at one end via a set screw, and the bushing is connected to the output end of a rotary cylinder via a fourth screw. The rotary cylinder is fixed on a mounting base, which is mounted on the other side of the hopper.

[0016] Optionally, an adjustment bracket is provided below the frame. The adjustment bracket includes a column and a connecting rod. The end of the column near the frame is detachably connected to the side wall of the frame, and the end of the column away from the frame is threadedly connected to a support. The support is fixed to the frame by a lock nut.

[0017] Optionally, the rotary cylinder is controlled by a solenoid valve.

[0018] A control method, applied to the double-layer uniform material feeding elevator as described above, the method comprising:

[0019] Receive start signal;

[0020] In response to the start signal, the guide plate is controlled to rotate to the first position so that the extension direction of the guide plate surface is perpendicular to the lower channel conveying surface of the double-layer conveying channel;

[0021] After the guide plate reaches the first position, the guide plate is controlled to rotate from the first position to the second position with preset parameters so that the extension direction of the guide plate surface is tilted towards the upper channel conveying surface of the double-layer conveying channel.

[0022] The guide plate is controlled to rotate periodically between a first position and a second position;

[0023] Control the elevator and the double-layer conveying channel to run at a preset conveying speed for a target duration.

[0024] Optionally, after controlling the hoist and double-layer conveyor to operate at a preset conveying speed for a target duration, the method further includes:

[0025] After the hoist and double-layer conveyor have been running for the target duration, control the hoist and double-layer conveyor to stop running;

[0026] Control the guide plate to rotate to the third position so that the discharge port is closed.

[0027] Optionally, the preset parameters include a preset rotation angle and a preset rotation speed.

[0028] The technical solution provided in this application may include the following beneficial effects: By setting a rotatable guide plate at the material drop port to adapt to the double-layer conveying channel below, the guide plate can rotate periodically between two working positions pointing to the upper and lower layers of the channel, thereby changing the material drop point position from fixed to alternately switchable, and thus continuously and evenly distributing the material to the double-layer conveying channel, thereby increasing the material conveying capacity. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the double-layer uniform material discharge elevator;

[0031] Figure 2 This is a structural diagram of the hoist;

[0032] Figure 3 This is an exploded view of the wheel axle;

[0033] Figure 4 These are schematic diagrams of the frame's planar and three-dimensional structure;

[0034] Figure 5 These are schematic diagrams of the conveyor belt's planar and three-dimensional structures;

[0035] Figure 6 This is an exploded view of the material discharge port;

[0036] Figure 7 This is a schematic diagram of the planar and three-dimensional structure of the hopper;

[0037] Figure 8 These are schematic diagrams of the planar and three-dimensional structures of the rotating shaft;

[0038] Figure 9 These are schematic diagrams of the planar and three-dimensional structures of the bushing;

[0039] Figure 10 These are schematic diagrams of the planar and three-dimensional structures of a rotary cylinder;

[0040] Figure 11 These are schematic diagrams of the planar and three-dimensional structures of the mounting base;

[0041] Figure 12 This is a schematic diagram of the adjustment bracket.

[0042] Reference numerals in the attached drawings: 1. Elevator; 2. Guide plate; 3. Double-layer conveying channel; 4. Upper channel; 5. Lower channel; 6. Frame; 7. Pulley shaft; 8. Motor; 9. Conveyor belt; 10. First bearing; 11. First bearing seat; 12. First screw; 13. Snap ring; 14. Hopper; 15. Rotating shaft; 16. Second screw; 17. Second bearing; 18. Second bearing seat; 19. Third screw; 20. Set screw; 21. Bushing; 22. Fourth screw; 23. Rotary cylinder; 24. Mounting base; 25. Adjusting bracket; 26. Column; 27. Connecting rod; 28. Support; 29. ​​Locking nut. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0044] Example 1:

[0045] See Figure 1 A double-layer uniform material feeding elevator, comprising:

[0046] The elevator 1 has a guide plate 2 rotatably installed at the material discharge port at its end;

[0047] The double-layer conveying channel 3 is located below the material discharge port, and the conveying surfaces of its upper channel 4 and lower channel 5 are both parallel to the horizontal plane.

[0048] In the working state, the guide plate 2 is configured to rotate periodically between a first position and a second position; when it is in the first position, the extension direction of its plate surface is perpendicular to the conveying surface of the lower channel 5; when it is in the second position, the extension direction of its plate surface is inclined to the conveying surface of the upper channel 4.

[0049] Specifically, the elevator 1 is Z-shaped, with the beginning being the feed end and the end being the discharge end, with the discharge port located at the end. The Z-shaped structure of the elevator 1 can achieve a large height difference in material lifting within a limited space; the feed end at the beginning is used to receive defective cigarettes (including whole cigarettes, broken cigarettes, tobacco mixtures, etc.) fed manually or transported by upstream equipment, and the discharge end at the end achieves concentrated material falling through the discharge port.

[0050] The guide plate 2 is rotatably installed at the discharge port, enabling it to rotate. By changing its tilt angle, the discharge point position and discharge rate can be adjusted. The double-layer conveyor channel 3 uses vertically parallel conveyor belts 9, vibrating conveyor troughs, or vibrating screens, with a gap between them and the bottom of the discharge port to avoid motion interference with the guide plate 2. The feed ends of the upper channel 4 and the lower channel 5 of the double-layer conveyor channel 3 are staggered, facilitating simultaneous material entry into both channels and preventing material interception in the upper channel 4, which would affect conveying efficiency. The discharge end of the double-layer conveyor channel 3 connects to the defective cigarette processing equipment.

[0051] When the guide plate 2 is in the first position, its extension direction is perpendicular to the conveying surface of the lower channel 5. That is, the guide plate 2 is located on the vertical surface, with its end away from the material drop outlet close to the conveying surface of the lower channel 5. The vertically pointing design of the plate surface allows the material to fall into the lower channel 5 along a vertical trajectory. Combined with the staggered feeding end layout of the double-layer conveying channels 3, the feeding end of the lower channel 5 is outside the projection range of the upper channel 4, and the vertically falling material will not be intercepted by the upper channel 4. When the guide plate 2 is in the second position, its extension direction is inclined to the conveying surface of the upper channel 4. That is, compared with the conveying surface of the upper channel 4, the guide plate 2 is in an inclined state. The inclined plate surface can form a smooth sliding track, guiding the material to slide smoothly into the upper channel 4. During the transition phase between the two positions, the continuous change of the plate surface posture will achieve a smooth connection of the guiding action and avoid interruption of the material drop.

[0052] In operation, the guide plate 2 is configured to rotate periodically between a first position and a second position. This allows material to fall continuously and evenly into the upper channel 4 and the lower channel 5 through the periodic rotation of the guide plate 2, achieving uniform feeding into both channels. Furthermore, when the guide plate 2 is in the first position, its angle with the plumb line is 0° to guide the material into the lower channel 5; when the guide plate 2 is in the second position, its angle with the plumb line should be less than 90° to guide the material smoothly into the upper channel 4. Based on these angle limitations, in operation, the rotation angle of the guide plate 2 in the first position is defined as the minimum rotation angle, fixed at 0°; the rotation angle of the guide plate 2 in the second position is defined as the maximum rotation angle, less than 90°. In operation, the guide plate 2 rotates periodically within this angle range, starting at the minimum rotation angle and ending at the maximum rotation angle, achieving continuous material feeding into the upper and lower channels. Preferably, in the working state, the maximum turning angle of the guide plate 2 is between 50° and 80°. Within this range, an effective sliding trajectory to the upper channel 4 can be formed, and the conveying rate can be guaranteed.

[0053] To recover qualified tobacco from defective cigarettes, traditional techniques typically employ a lifting device paired with a horizontal conveyor to transport the defective cigarettes to a processing facility for recycling. However, the guiding structure of traditional lifting and conveying equipment is usually fixed, unable to change the drop point position, and can only accommodate the feeding requirements of a single-layer horizontal conveyor, thus limiting the material conveying capacity. This application addresses this by installing a rotatable guide plate 2 at the drop point to accommodate the double-layer conveyor 3 below. The guide plate 2 can periodically rotate between two working positions pointing to the upper and lower layers of the conveyor 5, thereby changing the material drop point position from fixed to alternately switchable. This allows for continuous and even distribution of material to the double-layer conveyor 3, thereby increasing the material conveying capacity.

[0054] It should be noted that the materials in this application specifically refer to defective cigarettes.

[0055] Example 2:

[0056] Optionally, the guide plate 2 further has a third position, and the second position is located between the first position and the third position. The maximum rotation range of the guide plate 2 is configured from the first position to the third position, wherein the first position and the third position are arranged symmetrically about the rotation axis of the guide plate 2 at 180°.

[0057] Specifically, when the guide plate 2 rotates to the third position, it is located on the plumb surface, and its end away from the discharge port is away from the conveying surface of the lower channel 5. That is, the first and third positions are symmetrically arranged about the rotation axis of the guide plate 2 at 180°. The guide plates 2 in the two positions are coplanar, and their extension directions are opposite. In the non-working state, the guide plate 2 can rotate to the third position to close the discharge port. When the equipment needs to resume normal operation from the closed state, the guide plate 2 can rotate from the third position to the first or second position to restart the periodic material feeding process.

[0058] See Figure 1 , 2 Optionally, the hoist 1 includes:

[0059] The frame 6 has pulley shafts 7 mounted at its beginning and end, respectively. The pulley shafts 7 are connected to a motor 8 and have a conveyor belt 9 wound around them. The pulley shafts 7 have first bearings 10 and first bearing seats 11 mounted at both ends along their length. The first bearings 10 are fitted into the mounting holes of the first bearing seats 11, and the first bearing seats 11 are fixed to the frame 6 by first screws 12. The pulley shafts 7 pass through the inner ring of the first bearings 10, and have an annular retaining spring groove on their outer circumference. A retaining spring 13 is engaged in the annular retaining spring groove and abuts against the end face of the inner ring of the first bearings 10.

[0060] Specifically, the frame 6 serves as the mounting base, with pulley shafts 7 mounted at its beginning and end. The pulley shafts 7 are fitted into the mounting holes of the first bearing seats 11 at both ends of the first bearing 10. The first bearing seats 11 are then fixed to the frame 6 by first screws 12, forming a support structure for both ends of the pulley shafts 7. This structure provides a stable mounting reference for the pulley shafts 7, helping to ensure the coaxiality of the two ends of the pulley shafts 7 and reducing radial runout during rotation. The pulley shafts 7 pass through the inner ring of the first bearings 10, and a snap ring 13 is engaged in the annular snap ring groove on its outer circumference. The snap ring 13 abuts against the end face of the inner ring of the first bearing 10. Through the engagement of the snap ring 13 and the annular snap ring groove, axial positioning of the pulley shafts 7 is achieved. This design effectively prevents axial movement of the pulley shafts 7 during the rotation driven by the motor 8, avoids collisions and interference between the pulley shafts 7 and surrounding components, and ensures the stability of the transmission system. The first bearing housing 11 is fixed to the frame 6 by the first screw 12, and the pulley shaft 7 is axially positioned by the snap ring 13, both using a detachable connection method. During equipment assembly, the first bearing 10 and the first bearing housing 11 can be assembled as a whole, then fixed to the frame 6 by the first screw 12, and finally the pulley shaft 7 is inserted and snapped with the snap ring 13 before winding the conveyor belt 9. During equipment maintenance, the bearing housing assembly can be removed simply by removing the first screw 12, or the pulley shaft 7 can be pulled out by removing the snap ring 13, facilitating the inspection or replacement of components such as the first bearing 10 and the pulley shaft 7, reducing maintenance difficulty and time costs.

[0061] See Figure 1 , 6 Optionally, the discharge port includes:

[0062] The hopper 14 has a rotating shaft 15 mounted on it. The guide plate 2 is connected to the rotating shaft 15 by a second screw 16. A second bearing 17 and a second bearing seat 18 are fitted onto one end of the rotating shaft 15 along its length. The second bearing 17 is embedded in the mounting hole of the second bearing seat 18. The second bearing seat 18 is fixed to one side of the hopper 14 by a third screw 19.

[0063] Specifically, the hopper 14 is fixed to the discharge end of the frame 6 and covers the discharge end to constrain the discharge trajectory and prevent material spillage and waste. A rotating shaft 15 is mounted on the hopper 14, and the guide plate 2 is rigidly connected to the rotating shaft 15 via a second screw 16, providing a stable rotational support reference for the guide plate 2. Simultaneously, a second bearing 17, fitted along one end of the rotating shaft 15, is embedded in a second bearing seat 18. The second bearing seat 18 is then fixed to one side of the hopper 14 via a third screw 19, forming a stable single-sided support structure for the rotating shaft 15. This design limits the radial runout of the rotating shaft 15, ensuring that the rotation trajectory of the guide plate 2 is controllable during periodic rotation, and preventing posture deviations of the guide plate 2 due to shaft 15 wobbling, which would affect the uniform material discharge effect into the double-layer conveying channel 3. The connection between the guide plate 2 and the rotating shaft 15 via the second screw 16, and the fixation between the second bearing seat 18 and the hopper 14 via the third screw 19, are both detachable connection structures. During the assembly stage, the rotating shaft 15 can be inserted into the hopper 14 first, then the guide plate 2 can be fixed to the rotating shaft 15 with the second screw 16, then the second bearing 17 and bearing seat assembly can be assembled onto the rotating shaft 15, and finally the bearing seat can be fixed to the hopper 14 with the third screw 19. During the maintenance stage, the guide plate 2 can be removed for cleaning or replacement simply by removing the second screw 16, and the second bearing 17 and rotating shaft 15 can be inspected by removing the third screw 19. At the same time, the cover structure of the hopper 14 will not interfere with the disassembly and assembly operations, which greatly reduces the maintenance difficulty and time cost.

[0064] Optionally, the shaft 15 is connected to a bushing 21 at the other end via a set screw 20. The bushing 21 is connected to the output end of a rotary cylinder 23 via a fourth screw 22. The rotary cylinder 23 is fixed on a mounting base 24, which is mounted on the other side of the hopper 14.

[0065] Specifically, the rotary cylinder 23 serves as a power source, outputting stable reciprocating rotational power to meet the periodic rotation requirements of the guide plate 2. Compared to the motor 8, the rotary cylinder 23 offers more direct stroke control, allowing for precise limitation of the rotation angle by adjusting cylinder parameters, ensuring the positioning accuracy of the guide plate 2 at each working position. Simultaneously, the rotary cylinder 23 exhibits a fast response speed, adapting to rapid response requirements in scenarios such as equipment start-up and shutdown, and emergency fault handling. One end of the rotating shaft 15 is connected to the second bearing seat 18 via the second bearing 17 (support end), and the other end is connected to the output end of the rotary cylinder 23 via the bushing 21 (drive end). The mounting base 24 and the second bearing seat 18 are respectively fixed to both sides of the hopper 14, creating a symmetrical layout where the rotating shaft 15 is supported at one end and driven at the other.

[0066] The bushing 21 serves as a transitional connector, accommodating the dimensional differences between the output end of the rotary cylinder 23 and the rotating shaft 15, preventing connection failure due to dimensional mismatch. The set screw 20 enables quick and easy connection between the bushing 21 and the rotating shaft 15, facilitating easy disassembly and adjustment of their relative positions during maintenance, or replacement of damaged components. The rotary cylinder 23 is fixed to the mounting base 24, which in turn is fixed to the hopper 14, both using detachable connections. During assembly, the rotary cylinder 23 and mounting base 24 can be pre-assembled as a single unit before being fixed to the hopper 14. During maintenance, the rotary cylinder 23 or mounting base 24 can be removed simply by unscrewing the corresponding screws, eliminating the need to disassemble the internal structure of the hopper 14 and reducing maintenance difficulty. The mounting base 24 fixes the rotary cylinder 23 to the other side of the hopper 14, placing the drive component outside the hopper 14 without encroaching on the internal material feeding channel, thus preventing interference with the conveying of defective cigarettes.

[0067] Furthermore, the end of the bushing 21 near the rotary cylinder 23 is integrally formed with an annular connecting flange, on which 2 to 6 evenly distributed screw through holes are pre-set; the output end face of the rotary cylinder 23 is pre-set with threaded holes corresponding one-to-one with the through holes of the connecting flange of the bushing 21, and the axis of the output end is coaxially arranged with the inner hole of the bushing 21. During assembly, the connecting flange of the bushing 21 is brought into contact with the output end face of the rotary cylinder 23, so that the through holes and threaded holes are precisely aligned. Then, the fourth screw 22 is passed through the screw through hole of the bushing 21, screwed into the threaded hole of the output end of the rotary cylinder 23 and tightened, so as to achieve a rigid connection between the bushing 21 and the cylinder output end. The inner hole of the bushing 21 and the outer diameter of the rotating shaft 15 are transition fit. During assembly, the rotating shaft 15 is inserted into the inner hole of the bushing 21, and the set screw 20 is screwed in from the radial threaded hole of the bushing 21 until the end of the set screw 20 presses against the outer circumferential surface of the rotating shaft 15, so as to achieve circumferential fixation between the bushing 21 and the rotating shaft 15.

[0068] Optionally, the rotary cylinder 23 is controlled by a solenoid valve.

[0069] Specifically, the solenoid valve can precisely adjust the rotation direction, start and stop timing and stroke angle of the rotary cylinder 23 by controlling the on / off and flow direction of compressed air, avoiding cylinder overtravel or positioning deviation, ensuring the rotation accuracy of the guide plate 2, and thus ensuring the uniform material dropping effect of the double-layer conveying channel 3; its millisecond-level response speed can instantly switch the air path after receiving an emergency signal, driving the guide plate 2 to quickly complete the action, effectively responding to sudden working conditions such as downstream equipment failure and material switching, and reducing production losses.

[0070] Additionally, sensors can be configured to detect the rotation angle of the rotating shaft 15. For example, a permanent magnet can be coaxially fixed at the end of the rotating shaft 15 near the second bearing seat 18, and a Hall angle sensor can be installed at a corresponding position on the outside of the second bearing seat 18. The sensor can detect the change in the magnetic field of the permanent magnet as the rotating shaft 15 rotates in real time and output an electrical signal corresponding to the rotation angle. This signal is transmitted to the control system, which compares the real-time angle with a preset rotation angle threshold. By controlling the on / off state and reversal of the solenoid valve, the rotary cylinder 23 can be precisely started, stopped, and reversed. The preset rotation angle threshold refers to the angle target value set in advance for the equipment control system. These values ​​correspond to the precise angle that the rotating shaft 15 needs to rotate to when the guide plate 2 completes different tasks. The control system compares the actual angle of the rotating shaft 15 detected by the sensor in real time with these angle target values. Once the target is reached, the control system will immediately stop the rotary cylinder 23, so that the guide plate 2 stops exactly at the position where the task can be completed, without over-rotating or under-rotating.

[0071] Example 3:

[0072] See Figure 1 and 12 Optionally, an adjustment bracket 25 is provided below the frame 6. The adjustment bracket 25 includes a column 26 and a connecting rod 27. The end of the column 26 near the frame 6 is detachably connected to the side wall of the frame 6. The end of the column 26 away from the frame 6 is threadedly connected to a support 28, and the support 28 is fixed to the frame 6 by a locking nut 29.

[0073] Specifically, there are two columns 26, and a connecting rod 27 is fixed between the two columns 26. The end of the column 26 away from the frame 6 is threadedly connected to the support 28. By rotating the support 28, the height of the column 26 can be finely adjusted, thereby changing the tilt angle of the frame 6 and adjusting the elevation angle of the elevator 1. The support 28 and the frame 6 are fixed together with the locking nut 29, rigidly fixing the support 28 to the frame 6 and preventing the threads from loosening due to vibration during equipment operation, thus ensuring the long-term stability of the elevation angle. When the elevation angle is too large, the material will be subjected to a large component of gravity on the conveyor belt 9, which is prone to relative slippage. Adjusting the elevation angle optimizes the force on the material, balancing the component of the material's gravity along the conveyor belt 9 with the frictional force of the conveyor belt 9 and the frictional force between the materials, reducing the movement and stacking of materials on the conveyor belt 9, avoiding slippage caused by material stacking and compression, and ensuring that the material is conveyed uniformly and smoothly with the conveyor belt 9. If the elevation angle is too small, the discharge port will be too close to the inlet end of the double-layer conveying channel 3, affecting the material feeding effect.

[0074] Example 4:

[0075] Based on the above embodiments, this application provides a control method applied to the double-layer uniform material feeding elevator 1 as described above, the method comprising:

[0076] Receive start signal;

[0077] In response to the start signal, the guide plate 2 is controlled to rotate to the first position so that the extension direction of the guide plate 2 is perpendicular to the conveying surface of the lower channel 5 of the double-layer conveying channel 3.

[0078] After the guide plate 2 reaches the first position, the guide plate 2 is controlled to rotate from the first position to the second position with preset parameters so that the extension direction of the guide plate 2 is tilted towards the upper channel 4 conveying surface of the double-layer conveying channel 3.

[0079] The guide plate 2 is controlled to rotate periodically between the first position and the second position;

[0080] Control the elevator 1 and the double-layer conveying channel 3 to run at a preset conveying speed for a target duration.

[0081] Specifically, the control system receives a start signal, which may come from a batch start command from the workshop production system, a manual operation command from the site, or a ready feedback signal from the downstream double-layer conveying channel 3. After receiving the signal, the control system performs a self-check on the standby status of the elevator 1, the guide plate 2, and the double-layer conveying channel 3. After confirming that there are no abnormalities, it enters the standby execution state. The control system responds to the start signal and outputs a control command to rotate the guide plate 2 to the first position. At this time, the extension direction of the guide plate 2 is perpendicular to the conveying surface of the lower channel 5 of the double-layer conveying channel 3, ensuring that the defective cigarettes conveyed by the elevator 1 can fall into the lower channel 5 along the guide plate 2, completing the initial stage of directional material guidance. After the control system determines that the guide plate 2 is in the first position, it outputs a control command with preset parameters to rotate the guide plate 2 from the first position to the second position. At this time, the extension direction of the guide plate 2 is tilted towards the conveying surface of the upper channel 4 of the double-layer conveying channel 3, ensuring that the material can slide into the upper channel 4 along the plate surface, achieving full coverage material guidance of the double-layer channel. The preset parameters include a preset rotation angle and a preset rotation speed. The preset rotation speed is the angle value of the guide plate 2 rotating per unit time during the process of rotating from the first position to the second position. By setting the preset rotation speed, the switching rhythm of the guide plate 2 between the two positions can be controlled to avoid the tobacco in the defective cigarettes from scattering and the whole cigarette from being damaged by collision due to excessive rotation, or the material from accumulating on the guide plate 2 due to excessive rotation. At the same time, it can be matched with the periodic rotation rhythm of the guide plate 2 and the preset conveying speed of the elevator 1 and the double-layer conveying channel 3.

[0082] Furthermore, the preset rotation angle (i.e., the core preset parameter for the guide plate 2 to rotate from the first position to the second position) in this control method is determined by the minimum and maximum rotation angles during operation. When the guide plate 2 is in the first position, the angle between it and the plumb line is 0° to guide the material into the lower channel 5; when the guide plate 2 is in the second position, the angle between it and the plumb line should be less than 90° to guide the material smoothly into the upper channel 4. Based on the above angle limitations, during operation, the rotation angle of the guide plate 2 in the first position is defined as the minimum rotation angle, fixed at 0°; the rotation angle of the guide plate 2 when it rotates to the second position is defined as the maximum rotation angle, with a value less than 90°. During operation, the guide plate 2 rotates periodically within this angle range, starting from the minimum rotation angle and ending at the maximum rotation angle, to achieve continuous material guidance to the upper and lower channels. Preferably, in the working state, the maximum rotation angle of the guide plate 2 is between 50° and 80°. Within this range, an effective sliding trajectory to the upper channel 4 can be formed while ensuring the conveying speed. The specific value of the preset rotation angle is the difference between the maximum and minimum rotation angles. At the same time, the preset rotation angle also implies the rotation angle range of the guide plate 2, with the minimum rotation angle of 0° as the starting boundary and the maximum rotation angle as the ending boundary, thus defining the range of the periodic reciprocating rotation of the guide plate 2 in the working state.

[0083] As the guide plate 2 begins its periodic rotation, the control system synchronously outputs speed control commands, causing the elevator 1 and the double-layer conveying channel 3 to operate at a preset conveying speed. Based on production task requirements, the control system controls the equipment to operate in this state continuously for a target duration. The target duration refers to the total time, preset by the control system, during which the elevator 1 and the double-layer conveying channel 3 operate continuously at the preset conveying speed, and the guide plate 2 rotates periodically between its minimum and maximum turning angles; that is, the operating time of a single production task cycle. Combined with the periodic material distribution action of the guide plate 2, the target duration ensures that the double-layer channel receives a uniform material supply throughout the entire production cycle, avoiding interruptions in material delivery. The preset conveying speed of the elevator 1 refers to the linear speed at which the elevator 1 conveys defective cigarettes from the inlet to the outlet; the preset conveying speed of the double-layer conveying channel 3 refers to the linear speed at which the double-layer conveying channel 3 conveys the material guided by the guide plate 2 to subsequent processes. The preset conveying speed should match the discharge rate of the upstream defective product collection equipment and the feeding rate of the downstream process to avoid material blockage due to excessively high conveying speed or inefficiency due to excessively slow conveying speed. It should be noted that the rotation control of the guide plate 2 is achieved by the rotary cylinder 23, the structure of which has been given in Embodiment 2 and will not be described again here.

[0084] This method, upon receiving a start signal, first controls the guide plate 2 to rotate to a first position vertically pointing towards the conveying surface of the lower channel 5 of the double-layer conveying channel 3. Then, after the guide plate 2 reaches the first position, it is controlled to rotate to a second position inclined towards the conveying surface of the upper channel 4 with preset parameters. Subsequently, the guide plate 2 is controlled to rotate periodically between the two positions, thereby changing the material drop point position from fixed to alternately switchable. Simultaneously, in conjunction with a series of operations controlling the elevator 1 and the double-layer conveying channel 3 to run at a preset conveying speed for a target duration, the drop point position can be dynamically adjusted to adapt to the feeding needs of the upper and lower layers of the double-layer conveying channel 3, thereby continuously and evenly distributing the material to the double-layer conveying channel 3, thus increasing the material conveying capacity.

[0085] Example 5:

[0086] Based on the above embodiments, optionally, after controlling the elevator 1 and the double-layer conveying channel 3 to run at a preset conveying speed for a target duration, the method further includes:

[0087] When the elevator 1 and the double-layer conveying channel 3 have been running for the target duration, the elevator 1 and the double-layer conveying channel 3 shall be controlled to stop running.

[0088] Control the guide plate 2 to rotate to the third position so that the discharge port is closed.

[0089] Specifically, the control system accumulates the running time of the elevator 1 and the double-layer conveying channel 3 in real time. When the running time reaches the preset target time, it indicates that all the residual material at the discharge end of the elevator 1 has been guided to the double-layer conveying channel 3 by the guide plate 2 and then sent to the next process through the double-layer conveying channel 3. This ensures that the residual material in the double-layer conveying channel 3 is completely transported to the downstream process, avoiding material accumulation and blockage in the channel. At this time, the shutdown procedure is initiated: the control system outputs a stop operation command to the elevator 1 to stop its operation; then it outputs a stop operation command to the double-layer conveying channel 3 to stop its operation.

[0090] After the double-layer conveying channel 3 stops operating, the control system outputs a third position rotation command to the guide plate 2. The third position is a specially set closing position for the material discharge port of the guide plate 2. In this position, the guide plate 2 is located on the plumb surface, and its end away from the material discharge port is away from the conveying surface of the lower channel 5. The first position and the third position are symmetrically arranged about the rotation axis of the guide plate 2 at 180°, that is, the guide plates 2 in the two positions are coplanar, and the extension direction of the plate surface points in opposite directions. The control system drives the guide plate 2 to rotate through a preset speed. After the guide plate 2 reaches the third position, the control system controls the guide plate 2 to stop operating, thereby realizing the closing of the material discharge port in the non-working state.

[0091] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A two-deck uniform drop elevator characterized by, The utility model relates to a double-layer uniform blanking elevator, which comprises a lifting machine (1) and a guide plate (2) installed at the end of the lifting machine (1). The double-layer conveying channel (3) is arranged below the blanking port, and the conveying surfaces of the upper channel (4) and the lower channel (5) are parallel to the horizontal plane. In the working state, the guide plate (2) is configured to rotate periodically between a first position and a second position; when the guide plate (2) is in the first position, the extension direction of the plate surface is perpendicular to the conveying surface of the lower channel (5); when the guide plate (2) is in the second position, the extension direction of the plate surface is inclined to the conveying surface of the upper channel (4). The guide plate (2) also has a third position, and the second position is located between the first position and the third position, and the maximum rotation range of the guide plate (2) is configured to be from the first position to the third position, wherein the first position and the third position are arranged symmetrically about the rotation axis of the guide plate (2) by 180°.

2. The dual tier uniform drop material elevator of claim 1, wherein, The lifting machine (1) comprises a rack (6), a belt wheel shaft (7) arranged at the beginning and the end of the rack (6), a motor (8) drivingly connected to the belt wheel shaft (7), a conveying belt (9) wound around the belt wheel shaft (7), a first bearing (10) and a first bearing seat (11) sleeved on the lengthwise two ends of the belt wheel shaft (7), the first bearing (10) embedded in the mounting hole of the first bearing seat (11), the first bearing seat (11) fixed to the rack (6) by a first screw (12), the belt wheel shaft (7) penetrating the inner ring of the first bearing (10), an annular clamping spring groove formed in the outer periphery of the belt wheel shaft (7), a clamping spring (13) clamped in the annular clamping spring groove, and the clamping spring (13) abutting against the end face of the inner ring of the first bearing (10).

3. The dual tier uniform drop elevator of claim 1, wherein, The blanking port comprises a hopper (14), a rotating shaft (15) arranged on the hopper (14), the guide plate (2) connected to the rotating shaft (15) by a second screw (16), the rotating shaft (15) sleeved with a second bearing (17) and a second bearing seat (18) at one end, the second bearing (17) embedded in the mounting hole of the second bearing seat (18), the second bearing seat (18) fixed to one side of the hopper (14) by a third screw (19). The rotating shaft (15) connected to a shaft sleeve (21) at the other end by a locking screw (20), the shaft sleeve (21) connected to the output end of a rotary air cylinder (23) by a fourth screw (22), the rotary air cylinder (23) fixed to a mounting seat (24), and the mounting seat (24) mounted on the other side of the hopper (14).

4. The dual tier uniform drop elevator of claim 1, wherein, An adjusting support (25) is arranged below the rack (6), the adjusting support (25) comprising a stand column (26) and a connecting rod (27), one end of the stand column (26) close to the rack (6) detachably connected to the side wall of the rack (6), the other end of the stand column (26) away from the rack (6) threadedly connected to a support (28), and the support (28) fixed to the rack (6) by a locking nut (29). The rotary air cylinder (23) is controlled by an electromagnetic valve.

5. The dual tier uniform drop elevator of claim 4, wherein, The method is applied to the double-layer uniform blanking elevator according to any one of claims 1-7, and the method comprises:

6. The dual tier uniform drop elevator of claim 3, wherein, receiving a starting signal; 7. The dual layer uniform material drop elevator of claim 5, wherein, ​ 8. A control method characterized by, ​ ​ In response to the start signal, the material guide plate (2) is controlled to rotate to a first position, so that the extension direction of the plate surface of the material guide plate (2) is perpendicular to the conveying surface of the lower layer channel (5) of the double-layer conveying channel (3); After the material guide plate (2) reaches the first position, the material guide plate (2) is controlled to rotate from the first position to a second position at a preset parameter, so that the extension direction of the plate surface of the material guide plate (2) is inclined to the conveying surface of the upper layer channel (4) of the double-layer conveying channel (3); The material guide plate (2) is controlled to periodically rotate between the first position and the second position; The elevator (1) and the double-layer conveying channel (3) are controlled to run at a preset conveying speed for a target time length.

9. The control method according to claim 8, characterized by, After the elevator (1) and the double-layer conveying channel (3) run for the target time length, the elevator (1) and the double-layer conveying channel (3) are controlled to stop running; The material guide plate (2) is controlled to rotate to a third position, so that the material falling port is closed. The preset parameter includes a preset rotation angle and a preset rotation speed.

10. The control method according to claim 8, characterized by ​

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