Tobacco shredded tobacco stem storage device and its discharge non-steady-state time constant flow control method

Abstract

The present invention discloses a tobacco stalk storage device for silk production and a method for controlling the non-steady-state time constant flow rate of discharge thereof, comprising: four stalk storage cabinets supported on the ground by equipment brackets; a stalk storage cabinet discharge port installed below the stalk storage cabinet discharge port; a discharge belt supported on the ground by brackets and below the stalk storage cabinet discharge port; a conveyor belt supported on the ground by brackets and below the discharge belt discharge port; a lifting belt supported on the ground by brackets and below the conveyor belt discharge port; a metering tube installed below the discharge port of the lifting belt; an electronic scale supported on the ground by brackets and below the metering tube; and a photoelectric detection device installed at the feed port of the lifting belt. The technical content disclosed in the present invention solves the problem of inaccurate discharge flow rate control of the stalk storage cabinets at the head and tail stages in the silk production workshop, which easily affects product quality, reduces production costs, improves the intelligence level of the equipment, reduces manual labor intensity, and increases the safety of equipment use.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette making equipment, and more particularly to a tobacco shredded tobacco stem storage device and a method for controlling a non-steady-state time constant flow rate of a discharge thereof. Background Art

[0002] The non-steady-state time refers to the stages of discharging the material head and tail from the storage cabinet.

[0003] Storage cabinets are widely used in the silk-making process. They are crucial equipment for storing materials in the tobacco-making workshops of cigarette factories. The stability of the discharge flow from these cabinets directly determines the stability of downstream equipment process indicators and whether they meet process requirements. Storage cabinets are used to store materials for a certain period of time, balancing temperature and moisture content, and ensuring that the flow rate meets process requirements.

[0004] Currently, two types of storage cabinets are commonly used in silk production: flat-lay cabinets, suitable for first-in, last-out, and point-stacked cabinets, suitable for simultaneous loading and unloading. In silk production, most materials require storage for a period of time, so flat-lay cabinets are the most commonly used. These cabinets feature relatively even distribution of material, with a slope at the beginning and end of the material, and a relatively uniform distribution of material in the middle. During production, the material is discharged from the cabinets in the following order: beginning, normal, and end. The discharge time for these two stages is approximately 10 minutes. Because the material at the beginning and end is thin, it does not meet the flow rate set by the subsequent electronic scale. Large flow fluctuations result in a high coefficient of variation of the incoming material flow rate on the electronic scale, thus failing to meet the factory's process assessment standards. Furthermore, the thin material at the beginning and end of the material entering the main equipment can cause water-stained tobacco or dry tobacco, affecting the quality of the tobacco. To prevent this, an online operator manually starts and stops related equipment at the material head during discharge from the storage cabinet. This allows the thin material at the head to be evenly distributed across the various equipment levels in front of the metering tube, ensuring a stable material flow during normal material flow. At the end of the material flow, an online operator enters the storage cabinet in advance and sweeps the thin material onto the discharge conveyor with a broom to prevent flow fluctuations caused by the thin material at the end of the material flow. This method of manually controlling material flow stability not only increases the operator's workload but also poses certain safety risks.

[0005] Therefore, how to provide a tobacco shredded tobacco stem storage device and a method for controlling the non-steady-state time constant flow rate of its discharge has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The purpose of the present invention is to provide a tobacco shredded tobacco stem storage device and a method for controlling the non-steady-state time constant flow rate of the discharge thereof.

[0007] According to a first aspect of the present invention, a tobacco shredded tobacco stem storage device is provided, specifically a primary tobacco shredded tobacco stem storage cabinet, the tobacco shredded tobacco stem storage device comprising four stem storage cabinets, a stem cabinet dropout port, a discharge belt, a discharge belt motor, a conveyor belt, a conveyor belt motor, a lifting belt, a lifting belt motor, a metering tube, an electronic scale, and a detection photoelectric device;

[0008] The four stem storage cabinets are erected on the ground through equipment brackets; the stem storage cabinet drop-out port is installed below the stem storage cabinet discharge port; the discharge belt is erected on the ground through a bracket and below the stem storage cabinet drop-out port; the discharge belt motor is installed on the discharge belt; the conveyor belt is erected on the ground through a bracket and below the drop-out port of the discharge belt; the conveyor belt motor is installed on the conveyor belt; the lifting belt is erected on the ground through a bracket and below the drop-out port of the conveyor belt; the lifting belt motor is installed on the lifting belt; the limiting tube is installed below the drop-out port of the lifting belt; the electronic scale is erected on the ground through a bracket and below the limiting tube; the detection photoelectric is installed at the feeding port of the lifting belt.

[0009] Optionally, the four stem storage cabinets are: a No. 1 first-level stem storage cabinet, a No. 2 first-level stem storage cabinet, a No. 3 first-level stem storage cabinet, and a No. 4 first-level stem storage cabinet;

[0010] The No. 1 first-level stem storage tank and the No. 2 first-level stem storage tank are a group of top-to-top tanks that share a stem storage tank unloading port;

[0011] The No. 3 first-level stem storage cabinet and the No. 4 first-level stem storage cabinet are a group of top cabinets that share a stem storage cabinet unloading port.

[0012] Optionally, the first-level stem storage cabinet further includes: high-position photoelectric, middle-position photoelectric and low-position photoelectric;

[0013] The high-position photoelectric, middle-position photoelectric and low-position photoelectric are installed on the side of the limiting tube in the order of high, medium and low.

[0014] Optionally, the conveying direction of the conveyor belt is perpendicular to the conveying direction of the discharge belt.

[0015] Optionally, the conveying direction of the lifting belt is the same as the conveying direction of the conveyor belt.

[0016] Optionally, the drop opening of the lifting belt is higher than the drop opening of the conveyor belt.

[0017] According to a second aspect of the present invention, a method for controlling a non-steady-state time-constant flow rate of discharge from a tobacco shredded tobacco stem storage device is provided, comprising the tobacco shredded tobacco stem storage device according to any one of the first aspects of the present invention, the method comprising:

[0018] Normal production stage: When production starts, the detection photoelectric of the lifting belt does not participate in the control. When the low-position photoelectric, middle-position photoelectric and high-position photoelectric of the limit tube are not blocked, the lifting belt motor runs at high speed to feed, and the conveyor belt motor, discharge belt motor, feed roller motor and storage cabinet bottom belt motor operate normally; when the low-position photoelectric of the limit tube is blocked, and the middle-position photoelectric and high-position photoelectric are not blocked, the lifting belt motor runs at low speed to feed, and the conveyor belt motor, discharge belt motor, feed roller motor and storage cabinet bottom belt motor operate normally; when the low-position photoelectric and middle-position photoelectric are blocked, and the high-position photoelectric is not blocked, the lifting belt motor stops running to feed, and the conveyor belt motor, discharge belt motor, feed roller motor and storage cabinet bottom belt motor operate normally; when the high-position photoelectric of the limit tube is blocked, the conveyor belt motor, discharge belt motor, feed roller motor and storage cabinet bottom belt motor stop running to prevent blockage.

[0019] Optionally, the method further includes:

[0020] Material head stage: After the central control personnel selects a stem storage cabinet on the operation panel, they click the production button, and the selected stem storage cabinet starts to discharge materials; at this time, the center photoelectric of the limiting tube is not blocked, the detection photoelectric of the lifting belt is not blocked, the lifting belt motor does not start, the conveyor belt motor starts running, the discharge belt motor runs, the material-discharging roller motor runs, the storage cabinet bottom belt motor runs, and the tail end of the lifting belt is stacked and dropped; when the dropped tobacco stems reach the preset height and block the detection photoelectric, the lifting belt motor stops after running for 1 second and continues the stacking and dropping, and this process lasts for 5 minutes until the center photoelectric of the limiting tube is blocked; when the center photoelectric and the detection photoelectric of the limiting tube are blocked, the material head stacking process ends and waits for production to pass the material; at this time, the lifting belt motor, conveyor belt motor, discharge belt motor, material-discharging roller motor and storage cabinet bottom belt motor all stop running, and the thin material at the material head of the stem storage cabinet has been evenly spread on the equipment at all levels, and the material in the stem storage cabinet enters the normal material stage.

[0021] Optionally, the method further includes:

[0022] End of material stage: During the production process, when the first photoelectric signal of the empty material and the second photoelectric signal of the empty material are not blocked, the storage cabinet enters the end of material stage. At this time, the motor of the material-discharging roller runs in the reverse direction to displace the remaining material in the storage cabinet toward the discharge direction. The detection photoelectric signal of the lifting belt starts to work and the material is stacked and dropped. This process can be divided into two situations:

[0023] When the low-position photoelectric, middle-position photoelectric and high-position photoelectric of the limiting tube are not blocked, the lifting belt motor runs in the normal feeding high speed, medium speed and low speed sequence, and the conveyor belt motor, discharge belt motor, feeding roller motor and storage cabinet bottom belt motor operate normally;

[0024] When the middle and low photoelectric signals of the limiting tube are blocked, the lifting belt motor stops running. At this time, if the detection photoelectric signal is not blocked, the conveyor belt motor, the discharge belt motor, the material feeding roller motor and the storage cabinet bottom belt motor continue to run to perform point stacking and unloading until the detection photoelectric signal is blocked and all equipment stops running. This process lasts for 5 minutes until the end of production.

[0025] The technical content disclosed in the present invention has the following beneficial effects: a point-stacking function is implemented during the automatic operation of the lifting belt, thereby ensuring the overall stability of the flow rate at the beginning and end of the material discharge from the storage cabinet. By controlling the storage cabinet and downstream discharge equipment to operate in a point-stacking manner, it is ensured that the downstream discharge equipment of the storage cabinet must accumulate a certain amount of material before it is started, thereby achieving stable material flow during the operation of the downstream equipment. This solves the problem of inaccurate control of the discharge flow rate at the beginning and end of the material discharge from the storage cabinet in the silk-making workshop, which can easily affect product quality. This reduces production costs, improves the intelligence level of the equipment, reduces manual labor intensity, and increases equipment safety.

[0026] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0028] Figure 1 Schematic diagram of a tobacco stem storage device for cutting tobacco according to an embodiment;

[0029] Figure 2 A schematic diagram of a stem storage cabinet provided according to an embodiment;

[0030] Figure 3 A schematic diagram of the installation position of the detection photoelectric device provided in accordance with an embodiment;

[0031] Figure 4 Schematic diagram of the installation positions of high-position photoelectric, mid-position photoelectric and low-position photoelectric according to the embodiment.

[0032] Explanation of the accompanying symbols: 1-No. 1 first-level stem storage cabinet, 1-1-storage cabinet bottom belt motor, 1-2-bottom belt, 1-3-feeding roller motor, 1-4-feeding roller, 1-5-first photoelectric empty material, 1-6-second photoelectric empty material, 1-7-first-level stem storage cabinet door, 2-No. 2 first-level stem storage cabinet, 3-No. 3 first-level stem storage cabinet, 4-No. 4 first-level stem storage cabinet, 5-stem storage cabinet drop-off port, 6-discharging belt, 7-discharging belt motor, 8-conveyor belt, 9-conveyor belt motor, 10-lifting belt, 11-lifting belt motor, 12-limiting tube, 12-1-high-position photoelectric, 12-2-middle-position photoelectric, 12-3-low-position photoelectric, 13-electronic scale, 14-detection photoelectric. DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0036] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0037] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] According to the first aspect of the present invention, Figures 1 to 4 As shown, a tobacco stem storage device for shredded tobacco is provided, specifically a first-level tobacco stem storage cabinet for shredded tobacco. The tobacco stem storage device for shredded tobacco includes four stem cabinets, a stem cabinet drop-out port 5, a discharge belt 6, a discharge belt motor 7, a conveyor belt 8, a conveyor belt motor 9, a lifting belt 10, a lifting belt motor 11, a limiting tube 12, an electronic scale 13, and a detection photoelectric device 14.

[0039] The four stem storage cabinets are erected on the ground through equipment brackets; the stem storage cabinet blanking port 5 is installed below the discharge port of the stem storage cabinet; the discharge belt 6 is erected on the ground through a bracket and is below the stem storage cabinet blanking port 5; the discharge belt motor 7 is installed on the discharge belt 6; the conveyor belt 8 is erected on the ground through a bracket and is below the blanking port of the discharge belt 6; the conveyor belt motor 9 is installed on the conveyor belt 8; the lifting belt 10 is erected on the ground through a bracket and is below the blanking port of the conveyor belt 8; the lifting belt motor 11 is installed on the lifting belt 10; the limiting tube 12 is installed below the blanking port of the lifting belt 10; the electronic scale 13 is erected on the ground through a bracket and is below the limiting tube 12; the detection photoelectric 14 is installed at the feeding port of the lifting belt 10;

[0040] The discharging belt 6 is driven by the discharging belt motor 7 to transport the tobacco stems; the conveyor belt 8 is driven by the conveyor belt motor 9 to transport the tobacco stems; the lifting belt 10 is driven by the lifting belt motor 11 to transport the tobacco stems, and its operation is controlled by the high, medium and low photoelectric control of the limiting tube 12; the limiting tube 12 has a temporary storage function for the tobacco stems, the purpose of which is to ensure the stability of the flow of the electronic scale 13; the electronic scale 13 has a metering and weighing function for the tobacco stems; the detection photoelectric 14 detects the tobacco stems at the inlet of the lifting belt 10 at the beginning and end of the material, which plays a vital role in realizing the constant flow function.

[0041] In some embodiments, the cabinet bottom belt motor 1-1 drives the cabinet bottom belt 1-2 to operate, and transports the tobacco stems in the cabinet to the discharge port. The material feeding roller motor 1-3 drives the material feeding roller 1-4 to operate, and feeds the tobacco stems in the opposite direction of the discharge port. The first photoelectric display 1-5 for the empty material and the second photoelectric display 1-6 for the empty material form a group of opposing photoelectrics to detect the remaining amount of tobacco stems in the cabinet. The cabinet door 1-7 is convenient for access for maintenance and sanitation.

[0042] In some embodiments, the four stem storage tanks are: No. 1 first-level stem storage tank 1, No. 2 first-level stem storage tank 2, No. 3 first-level stem storage tank 3, No. 4 first-level stem storage tank 4;

[0043] The first-level stem storage cabinet 1 and the second-level stem storage cabinet 2 are a group of top cabinets that share a stem storage cabinet drop-out port 5;

[0044] The third level stem storage cabinet 3 and the fourth level stem storage cabinet 4 are a group of top cabinets that share a stem storage cabinet drop-out port 5 .

[0045] The first-level stem storage cabinet also includes: a high-level photoelectric 12-1, a middle-level photoelectric 12-2 and a low-level photoelectric 12-3;

[0046] The high-position photoelectric device 12-1, the middle-position photoelectric device 12-2 and the low-position photoelectric device 12-3 are installed on the side of the limiting tube 12 in the order of high, medium and low, and are used to control the running speed of the lifting belt and the height of the material in the limiting tube.

[0047] The conveying direction of the conveyor belt 8 is perpendicular to the conveying direction of the discharge belt 6 .

[0048] The conveying direction of the lifting belt 10 is the same as the conveying direction of the conveyor belt 8 .

[0049] The drop opening of the lifting belt 10 is higher than the drop opening of the conveyor belt 8 .

[0050] In some embodiments, the first-level stem storage cabinet also includes: PLC program: a storage cabinet discharging control system is written using Siemens s7-300 / 400 PLC programming software, which classifies and writes the operation control of the stem storage cabinet feed roller motor, bottom belt motor, discharging belt, conveyor belt, lifting belt and limiting pipe in the three stages of storage cabinet discharging stage, normal operation stage and tail stage.

[0051] WICC screen: Add a production button to the WICC operation panel and establish a connection channel between the button and the PLC program to control the start and stop of the equipment.

[0052] According to a second aspect of the present invention, a method for controlling a non-steady-state time-constant flow rate of discharge from a tobacco shredded tobacco stem storage device is provided, comprising the tobacco shredded tobacco stem storage device described in any one of the first embodiments, the method comprising:

[0053] Normal production stage: When production starts, the detection photoelectric 14 of the lifting belt 10 does not participate in the control. When the low-position photoelectric 12-3, the middle-position photoelectric 12-2 and the high-position photoelectric 12-1 of the limiting tube 12 are not blocked, the lifting belt motor 11 runs at high speed to feed the material, and the conveyor belt motor 9, the discharging belt motor 7, the material-discharging roller motor 1-3 and the storage cabinet bottom belt motor 1-1 operate normally; when the low-position photoelectric 12-3 of the limiting tube 12 is blocked, the middle-position photoelectric 12-2 and the high-position photoelectric 12-1 are not blocked, the lifting belt motor 11 runs at low speed to feed the material, and the conveyor belt motor 9, the discharging belt motor 7, the material-discharging roller motor 1-3 and the storage cabinet bottom belt motor 1-1 operate normally. The machine 9, the discharge belt motor 7, the feed roller motor 1-3 and the storage cabinet bottom belt motor 1-1 operate normally; when the low-position photoelectric 12-3 and the middle-position photoelectric 12-2 are blocked, and the high-position photoelectric 12-1 is not blocked, the lifting belt motor 11 stops running to feed, and the conveyor belt motor 9, the discharge belt motor 7, the feed roller motor 1-3 and the storage cabinet bottom belt motor 1-1 operate normally; when the high-position photoelectric 12-1 of the limiting tube 12 is blocked, the conveyor belt motor 9, the discharge belt motor 7, the feed roller motor 1-3 and the storage cabinet bottom belt motor 1-1 stop running to prevent blockage.

[0054] Material head stage: After the central control personnel selects a stem storage cabinet on the operation panel and clicks the production button, the selected stem storage cabinet starts to discharge materials; at this time, the middle photoelectric 12-2 of the limiting tube 12 is not blocked, the detection photoelectric 14 of the lifting belt 10 is not blocked, the lifting belt motor 11 is not started, the conveyor belt motor 9 starts running, the discharge belt motor 7 runs, the material feeding roller motor 1-3 runs, the storage cabinet bottom belt motor 1-1 runs, and the tail end material of the lifting belt 10 is stacked and dropped; when the dropped tobacco stems reach the preset height and block the detection photoelectric 14, the lifting belt motor 1 1 stops after running for 1 second, and continues the point stacking and dropping of materials. This process lasts for 5 minutes until the middle photoelectric 12-2 of the limiting tube 12 is blocked; when the middle photoelectric 12-2 and the detection photoelectric 14 of the limiting tube 12 are blocked, the material head point stacking process ends and waits for production to pass the material; at this time, the lifting belt motor 11, the conveyor belt motor 9, the discharge belt motor 7, the material feeding roller motor 1-3 and the storage cabinet bottom belt motor 1-1 all stop running, and the thin material at the material head of the storage cabinet has been evenly spread on the equipment at all levels, and the material in the storage cabinet enters the normal material stage.

[0055] End of material stage: During the production process, when the first photoelectric indicator 1-5 and the second photoelectric indicator 1-6 of the empty material storage cabinet are not blocked, the storage cabinet enters the end of material stage. At this time, the material transfer roller motor 1-3 runs in the reverse direction to transfer the remaining material in the storage cabinet to the discharge direction. The detection photoelectric 14 of the lifting belt 10 starts to work and the material is stacked and dropped. This process can be divided into two cases:

[0056] When the low photoelectric 12-3, the middle photoelectric 12-2 and the high photoelectric 12-1 of the limiting tube 12 are not blocked, the lifting belt motor 11 runs in the normal feeding high speed, medium speed and low speed sequence, and the conveyor belt motor 9, the discharge belt motor 7, the material roller motor 1-3 and the storage cabinet bottom belt motor 1-1 operate normally;

[0057] When the middle photoelectric 12-2 and the low photoelectric 12-3 of the limiting tube 12 are blocked, the lifting belt motor 11 stops running. At this time, if the detection photoelectric 14 is not blocked, the conveyor belt motor 9, the discharge belt motor 7, the material feeding roller motor 1-3 and the storage cabinet bottom belt motor 1-1 continue to run to perform point stacking and dropping until the detection photoelectric 14 is blocked and all equipment stops running; this process lasts for 5 minutes until the end of production.

[0058] In summary, the technical content disclosed in the present invention realizes a point-stacking function during the automatic operation of the lifting belt, thereby ensuring the overall stability of the flow rate at the beginning and end of the material discharge from the storage cabinet. By controlling the storage cabinet and downstream discharge equipment to operate in a point-stacking manner, it is ensured that the downstream discharge equipment of the storage cabinet is restarted after a certain amount of material has accumulated, thereby achieving the stability of the material flow rate of the downstream equipment during operation. This solves the problem of inaccurate control of the discharge flow rate at the beginning and end of the material discharge from the storage cabinet in the silk-making workshop, which can easily affect product quality. This reduces production costs, improves the intelligence level of the equipment, reduces manual labor intensity, and increases the safety of equipment use.

[0059] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A method for controlling the unsteady-state time constant flow rate of discharge from a tobacco shred and stem storage device, characterized in that: The device comprises a tobacco stem storage device for making cut tobacco, and the device comprises: four stem storage cabinets, a stem storage cabinet discharge port, a discharge belt, a discharge belt motor, a conveyor belt, a conveyor belt motor, a lifting belt, a lifting belt motor, a limiting tube, an electronic scale and a detection photoelectric device; The four stem storage cabinets are erected on the ground through equipment brackets; the stem storage cabinet blanking port is installed below the stem storage cabinet discharge port; the discharge belt is erected on the ground through a bracket and below the stem storage cabinet blanking port; the discharge belt motor is installed on the discharge belt; the conveyor belt is erected on the ground through a bracket and below the discharge belt blanking port; the conveyor belt motor is installed on the conveyor belt; the lifting belt is erected on the ground through a bracket and below the conveyor belt blanking port; the lifting belt motor is installed on the lifting belt; the limiting tube is installed below the discharge port of the lifting belt; the electronic scale is erected on the ground through a bracket and below the limiting tube; the detection photoelectric is installed at the feeding port of the lifting belt; The limiting tube further comprises: a high-position photoelectric device, a middle-position photoelectric device and a low-position photoelectric device; the high-position photoelectric device, the middle-position photoelectric device and the low-position photoelectric device are installed on the side of the limiting tube in the order of high, medium and low; The method comprises: Normal production stage: When production starts, the detection photoelectric of the lifting belt does not participate in the control. When the low-position photoelectric, middle-position photoelectric and high-position photoelectric of the limit tube are not blocked, the lifting belt motor runs at high speed to feed materials, and the conveyor belt motor, discharge belt motor, material discharging roller motor and storage cabinet bottom belt motor operate normally; when the low-position photoelectric of the limit tube is blocked, and the middle-position photoelectric and high-position photoelectric are not blocked, the lifting belt motor runs at low speed to feed materials, and the conveyor belt motor, discharge belt motor, material discharging roller motor and storage cabinet bottom belt motor operate normally; when the low-position photoelectric and middle-position photoelectric are blocked, and the high-position photoelectric is not blocked, the lifting belt motor stops running to feed materials, and the conveyor belt motor, discharge belt motor, material discharging roller motor and storage cabinet bottom belt motor operate normally; when the high-position photoelectric of the limit tube is blocked, the conveyor belt motor, discharge belt motor, material discharging roller motor and storage cabinet bottom belt motor stop running to prevent material blockage; The method further comprises: Material head stage: After the central control personnel selects a stem storage cabinet on the operation panel and clicks the production button, the selected stem storage cabinet starts to discharge materials; at this time, the center photoelectric of the limiting tube is not blocked, the detection photoelectric of the lifting belt is not blocked, the lifting belt motor does not start, the conveyor belt motor starts running, the discharge belt motor runs, the material-discharging roller motor runs, the storage cabinet bottom belt motor runs, and the tail end of the lifting belt is stacked and dropped; when the dropped tobacco stems reach the preset height and block the detection photoelectric, the lifting belt motor stops after running for 1 second and continues the stacking and dropping, and this process lasts for 5 minutes until the center photoelectric of the limiting tube is blocked; when the center photoelectric and the detection photoelectric of the limiting tube are blocked, the material head stacking process ends and waits for production to pass the material; at this time, the lifting belt motor, conveyor belt motor, discharge belt motor, material-discharging roller motor and storage cabinet bottom belt motor all stop running, and the thin material at the material head of the stem storage cabinet has been evenly spread on the equipment at all levels, and the material in the stem storage cabinet enters the normal material stage; The method further comprises: End of material stage: During the production process, when the first photoelectric signal of the empty material and the second photoelectric signal of the empty material are not blocked, the storage cabinet enters the end of material stage. At this time, the motor of the material-discharging roller runs in the reverse direction to displace the remaining material in the storage cabinet toward the discharge direction. The detection photoelectric signal of the lifting belt starts to work and the material is stacked and dropped. This process can be divided into two situations: When the low-position photoelectric, middle-position photoelectric and high-position photoelectric of the limiting tube are not blocked, the lifting belt motor runs in the normal feeding high speed, medium speed and low speed sequence, and the conveyor belt motor, discharge belt motor, feeding roller motor and storage cabinet bottom belt motor operate normally; When the middle and low photoelectric signals of the limiting tube are blocked, the lifting belt motor stops running. At this time, if the detection photoelectric signal is not blocked, the conveyor belt motor, the discharge belt motor, the material feeding roller motor and the storage cabinet bottom belt motor continue to run to perform point stacking and unloading until the detection photoelectric signal is blocked and all equipment stops running. This process lasts for 5 minutes until the end of production.

2. The method for controlling the unsteady-state time constant flow rate of discharge from a tobacco shredded tobacco stem storage device according to claim 1, characterized in that: The four stem storage cabinets are: No. 1 first-level stem storage cabinet, No. 2 first-level stem storage cabinet, No. 3 first-level stem storage cabinet, and No. 4 first-level stem storage cabinet; The No. 1 first-level stem storage tank and the No. 2 first-level stem storage tank are a group of top-to-top tanks that share a stem storage tank unloading port; The No. 3 first-level stem storage cabinet and the No. 4 first-level stem storage cabinet are a group of top cabinets that share a stem storage cabinet unloading port.

3. The method for controlling the unsteady-state time constant flow rate of discharge from a tobacco shredded tobacco stem storage device according to claim 2, characterized in that: The conveying direction of the conveyor belt is perpendicular to the conveying direction of the discharge belt.

4. The method for controlling the unsteady-state time constant flow rate of discharge from a tobacco shredded tobacco stem storage device according to claim 3, characterized in that: The conveying direction of the lifting belt is the same as the conveying direction of the conveyor belt.

5. The method for controlling the unsteady-state time constant flow rate of discharge from a tobacco shredded tobacco stem storage device according to claim 4, characterized in that: The drop opening of the lifting belt is higher than the drop opening of the conveyor belt.

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