Tobacco flexible winnowing control method, device, equipment and medium

Abstract

The present disclosure provides a tobacco flexible winnowing control method, device, equipment and medium, relating to the technical field of tobacco processing and manufacturing equipment. The method comprises: detecting the first purity of the first material; if the first purity is less than the first purity threshold, reducing the initial material flow entering the primary winnowing box; using a laser scanning online test material flow system to detect whether the flow of the third material is greater than the flow threshold; if the flow of the third material on the third discharge belt is greater than the flow threshold, increasing the air flow of the air supplementing port, and detecting the purity of the second material in real time; when the purity of the second material is less than the first purity threshold and greater than the second purity threshold, continue to increase the air flow of the air supplementing port until the purity of the second material is greater than or equal to the first purity threshold. The present disclosure automatically and dynamically detects the purity of the material during the production process, and ensures that the cut tobacco purity meets the standard through relevant actions.

Description

Technical Field

[0001] This disclosure relates to the field of tobacco processing and manufacturing equipment technology, and more specifically, to a method, apparatus, equipment, and medium for flexible tobacco air separation control. Background Technology

[0002] After tobacco products enter the sorting box through the feeding mechanism, they are first separated by a primary air classifier. Due to differences in density and air-receiving area, the materials fall at different distances, thus achieving separation. However, this separation method is ineffective for materials with similar mass densities. To ensure separation efficiency, a secondary separation box is used to perform a second flotation on the separated materials. Utilizing the difference in suspension velocity, lighter materials are selected and discharged from the primary air classifier outlet, while heavier and larger materials are discharged from the secondary separation box outlet. After multiple processes, the materials exit from the secondary air classifier outlet. Although there is a relatively high air velocity in the waste hopper, its cross-section is much smaller than that of the air classifier box, maintaining a suitable air velocity across the box's cross-section. Materials of different mass densities fall into different parts of the box. Throughout the process, apart from dust, no material is carried out of the box by the airflow, achieving in-situ separation without air separation. However, controlling the flexible air separation of tobacco to ensure material purity remains a crucial challenge for researchers. Summary of the Invention

[0003] One technical problem this disclosure aims to solve is to provide a flexible tobacco air separation control method, device, equipment, and medium that automatically and dynamically detects the purity of materials during the production process and ensures that the purity of the materials (tobacco shreds) meets the standards through related actions.

[0004] According to one aspect of this disclosure, a method for flexible wind separation control of tobacco is provided, comprising:

[0005] The purity of the first material on the first discharge belt is detected using an online tobacco structure detection system, wherein the first material is discharged from the primary air classifier outlet.

[0006] If the first purity level is less than the first purity threshold, the initial material flow rate entering the primary air classifier is reduced.

[0007] A laser scanning online material flow testing system is used to detect whether the flow rate of the third material on the third discharge belt is greater than a flow rate threshold, wherein the third material is discharged from the secondary separation box;

[0008] If the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, the air force of the air inlet is increased, and the purity of the second material on the second discharge belt is detected in real time. When the purity of the second material on the second discharge belt is less than the first purity threshold but greater than the second purity threshold, the air force of the air inlet is increased until the purity of the second material on the second discharge belt is greater than or equal to the first purity threshold. The second material is discharged from the secondary air separation outlet.

[0009] In some embodiments, if the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, the air force of the air inlet is increased, and the purity of the second material on the second discharge belt is detected in real time. When the purity of the second material on the second discharge belt is less than 99% but greater than 95%, the air force of the air inlet is increased until the purity of the second material on the second discharge belt is greater than or equal to 99%.

[0010] In some embodiments, reducing the initial material flow rate entering the primary air separator includes adjusting the initial material flow rate from 5000 kg / h to 4000 kg / h.

[0011] According to another aspect of this disclosure, a flexible tobacco air separation control device is also proposed, comprising:

[0012] The first detection module is used to detect the first purity of the first material on the first discharge belt using an online tobacco structure detection system.

[0013] The reduction module is used to reduce the initial material flow rate entering the primary air classifier if the first purity is less than the first purity threshold.

[0014] The second detection module is used to detect whether the flow rate of the third material on the third discharge belt is greater than the flow rate threshold using a laser scanning online material flow testing system.

[0015] The booster module is used to increase the airflow at the air inlet if the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, and to detect the purity of the second material on the second discharge belt in real time. When the purity of the second material on the second discharge belt is less than the first purity threshold but greater than the second purity threshold, the airflow at the air inlet is increased until the purity of the second material on the second discharge belt is greater than or equal to the first purity threshold.

[0016] According to another aspect of this disclosure, an electronic device is also provided, the electronic device comprising:

[0017] One or more processors;

[0018] A storage device for storing one or more programs that, when executed by one or more processors, enable the electronic device to implement the tobacco flexible air separation control method described above.

[0019] According to another aspect of this disclosure, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a computer's processor, causes the computer to perform the tobacco flexible air separation control method as described above.

[0020] In this embodiment, the purity detected by the online tobacco structure detection system is used to automatically adjust the flow rate of the material entering the primary air classifier. Furthermore, the air force of the make-up air inlet is adjusted by the coordinated operation of the laser scanning online material flow test system and the online tobacco structure detection system in the secondary air classifier, ensuring that the purity of the material at the primary air classifier outlet and the secondary air classifier outlet meets the standards.

[0021] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0023] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0024] Figure 1 This is an architectural diagram of the flexible wind separation control method for tobacco disclosed herein;

[0025] Figure 2 This is a schematic flowchart illustrating some embodiments of the flexible air separation control method for tobacco disclosed herein;

[0026] Figure 3 This is a block diagram of the flexible tobacco air separation control device disclosed herein;

[0027] Figure 4 This is a schematic diagram of the structure of a computer system for an electronic device according to some embodiments of the present disclosure. Detailed Implementation

[0028] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0029] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0034] First, it should be noted that the materials mentioned below include tobacco shreds, and may also contain impurities such as stems or clumps of tobacco.

[0035] like Figure 1 As shown, an online weighing and metering system is added to the front end of the feeding and leveling vibrating trough to ensure the uniform flow of material after drying. The material conveyed from the online weighing and metering system enters the feeding and leveling vibrating trough, which is inserted 200mm into the primary air classifier. The feeding and leveling vibrating trough and the primary air classifier are connected by a flexible connection to prevent leakage. There is a baffle plate with a length equal to the width of the feeding and leveling vibrating trough at the material drop point in the primary air classifier. The baffle plate has an inclination angle of 45°. All the material flowing into the primary air classifier from the feeding and leveling vibrating trough can pass through the side air intake and the bottom air intake as evenly as possible to ensure that the material is fully floated by the wind. The floating material is then transported by the feeding belt to the primary air classifier outlet. Then, the material that has passed the first air classifier is transported to the next process from the first discharge belt.

[0036] The lower part of the primary air separator is equipped with a secondary separation box, which also contains needle rollers. Some materials will enter the secondary separation box and be blown by the lower air intake. After entering the secondary separation box, the sorted materials will be further loosened and separated by the action of multiple needle rollers, thus improving the sorting efficiency. It is equivalent to performing a secondary floating separation on the materials in the secondary separation box.

[0037] After secondary separation, the material falls from the primary sorting outlet of the secondary separation box to the third discharge belt. A laser scanning online material flow test system is installed directly above the third discharge belt. The main function of the laser scanning online material flow test system is to detect the flow rate of the material on the third discharge belt.

[0038] After secondary separation, the material is conveyed from the third discharge belt to the secondary air separator. After being separated by the secondary air separator, metal debris such as stalks falls from the secondary sorting outlet. The remaining material after being separated by the secondary air separator is conveyed through the air conveying pipe to the secondary air separator outlet. The material at the secondary air separator outlet falls to the second discharge belt, which then conveys the material after secondary air separation to the next process.

[0039] It should be added that the materials on both the first and second discharge belts must be inspected by the tobacco structure detection system.

[0040] like Figure 2 As shown, this disclosure proposes a flexible wind separation control method for tobacco, comprising the following steps:

[0041] In step 210, the purity of the first material on the first discharge belt is detected using an online tobacco structure detection system.

[0042] In some embodiments, the first material is the material after passing through a primary air classifier. The first material falls from the primary air classifier outlet and onto the first discharge belt. The tobacco structure detection system obtains the material image and calculates the first purity using a built-in algorithm.

[0043] In step 220, if the first purity is less than the first purity threshold, the initial material flow rate entering the primary air classifier is reduced.

[0044] In some embodiments, the first purity threshold is 99%. The primary air classifier has two outlets: one is the outlet for the primary sorted material after passing through the secondary separation box, and the other is the primary air classifier discharge outlet. The initial material refers to the material flowing into the primary air classifier from the feed uniform vibrating trough.

[0045] In some embodiments, the initial material is fed through the side and bottom air intakes, and a portion of the material is conveyed to the primary air separator outlet via the feeding belt inside the primary air separator box. The material then falls onto the first discharge belt. An online structural detection system monitors the material falling onto the first discharge belt. If the actual purity of the material is found to be less than 99%, it indicates that the current flow rate of material entering the primary air separator box is too high. Therefore, the flow rate entering the primary air separator box needs to be limited and reduced. When the online tobacco structure detection system detects that the purity of the material is greater than 99%, the material flow rate is no longer adjusted, and the material is stably conveyed to the primary air separator box at this current flow rate.

[0046] In step 230, the laser scanning online material flow testing system is used to detect whether the flow rate of the third material on the third discharge belt is greater than the flow rate threshold.

[0047] In some embodiments, the laser scanning online material flow testing system is electrically connected to the controller of the make-up air supply device. If the laser scanning online material flow testing system detects that the flow rate of the third material on the third discharge belt is too high, the laser scanning online material flow testing system will generate a trigger command to the controller of the make-up air supply device to increase the air force at the make-up air inlet. The inventors need to further explain that the laser scanning online material measurement system communicates with the online tobacco structure detection system. When the online tobacco structure detection system detects a problem with the purity of the tobacco, the laser scanning online material measurement system will, in conjunction with the controller of the make-up air supply device, increase the make-up air force according to the ratio between the air force value and the flow rate value. That is, when the laser scanning online material measurement system detects that the online tobacco structure detection system sends an unqualified signal, it will obtain the current flow rate value and adjust the make-up air force in real time according to the ratio (i.e., the fixed ratio between the flow rate value and the air force value) through the central control program, so that the purity of the tobacco falling from the secondary air separation outlet is above 99%.

[0048] In some embodiments, the central control program is a program burned into the PLC controller.

[0049] In step 240, if the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, the air force of the air inlet is increased, and the purity of the second material on the second discharge belt is detected in real time. When the purity of the second material on the second discharge belt is less than the first purity threshold but greater than the second purity threshold, the air force of the air inlet is increased until the purity of the second material on the second discharge belt is greater than or equal to the first purity threshold.

[0050] In some embodiments, the specific details of step 240 have already been mentioned in step 230, and the already stated content will not be repeated. Step 240 should be explained as follows: if the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, the flow rate threshold is calculated based on the current make-up air force value and the fixed proportional relationship between the flow rate value and the air force value.

[0051] In some embodiments, the purity of the second material on the second discharge belt is detected in real time. When the purity of the second material on the second discharge belt is less than 99% but greater than 95%, the air force of the air supply vent is increased. When the purity is less than or equal to 95%, the specific action to be performed is not within the scope of this disclosure.

[0052] Specifically, when the purity of the second material on the second discharge belt is less than 99% but greater than 95%, the air force of the air supply port is further increased. This setting is intended to prevent air leakage from the secondary separation box or the air conveying pipeline.

[0053] The inventors need to add that, in step 240, the relevant actions can only be performed under the premise that the flow rate of the third material on the third discharge belt is greater than the flow rate threshold.

[0054] Let's assume a scenario where the normal flow rate of the third material on the third discharge belt is 6 (generally speaking), but the current flow rate suddenly and continuously increases to 10. Then, increase the air pressure at the air inlet. Based on the purity of the processed second material (purity between 95% and 99%), continue to increase the air pressure at the air inlet until the purity of the second material on the second discharge belt is greater than or equal to 99%.

[0055] like Figure 3 As shown, this disclosure also proposes a flexible tobacco air separation control device, comprising:

[0056] The first detection module 310 is used to detect the first purity of the first material on the first discharge belt using an online tobacco structure detection system.

[0057] The reduction module 320 is used to reduce the initial material flow rate entering the primary air classifier if the first purity is less than the first purity threshold.

[0058] The second detection module 330 is used to detect whether the flow rate of the third material on the third discharge belt is greater than the flow rate threshold using a laser scanning online material flow testing system.

[0059] The increasing module 340 is used to increase the air force of the air inlet if the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, and to detect the purity of the second material on the second discharge belt in real time. When the purity of the second material on the second discharge belt is less than the first purity threshold but greater than the second purity threshold, the air force of the air inlet is increased until the purity of the second material on the second discharge belt is greater than or equal to the first purity threshold.

[0060] like Figure 4 As shown, this disclosure also proposes an electronic device 400, including a processor 410, a storage device 420, and a communication bus 430;

[0061] Communication bus 430 is used to connect processor 410 and memory 420;

[0062] The processor 410 is used to execute a computer program stored in the memory 420 to implement one or more tobacco flexible air separation control methods as described in the above embodiments.

[0063] This application also provides a computer-readable storage medium having a computer program stored thereon, the computer program being used to cause a computer to perform the methods as described in any of the above embodiments.

[0064] This application also provides a non-volatile readable storage medium storing one or more modules (programs). When these modules are applied to a device, they enable the device to execute the instructions included in Embodiment 1 of this application.

[0065] It should be noted that the computer-readable medium described in this disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution device, apparatus, or device. In this disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution device, apparatus, or apparatus. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0066] The aforementioned computer-readable medium may be included in the aforementioned electronic device; or it may exist independently and not assembled into the electronic device.

[0067] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0068] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using dedicated hardware-based means to perform the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0069] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A method for flexible air separation control of tobacco, characterized in that, The method includes: The purity of the first material on the first discharge belt is detected using an online tobacco structure detection system, wherein the first material is discharged from the primary air classifier outlet. If the first purity level is less than the first purity threshold, the initial material flow rate entering the primary air classifier is reduced. A laser scanning online material flow testing system is used to detect whether the flow rate of the third material on the third discharge belt is greater than a flow rate threshold, wherein the third material is discharged from the secondary separation box; If the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, the air force of the make-up air inlet is increased, and the purity of the second material on the second discharge belt is monitored in real time. When the purity of the second material on the second discharge belt is less than the first purity threshold but greater than the second purity threshold, the air force of the make-up air inlet is increased again until the purity of the second material on the second discharge belt is greater than or equal to the first purity threshold. The second material is discharged from the secondary air separation outlet. Specifically, if the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, the air force of the make-up air inlet is increased, and the purity of the second material on the second discharge belt is monitored in real time. When the purity of the second material on the second discharge belt is less than 99% but greater than 95%, the air force of the make-up air inlet is increased again until the purity of the second material on the second discharge belt is greater than or equal to 99%.

2. The tobacco flexible air separation control method according to claim 1, characterized in that, The reduction of the initial material flow rate entering the primary air separator includes adjusting the initial material flow rate from 5000 kg / h to 4000 kg / h.

3. A flexible tobacco air separation control device, applied to the flexible tobacco air separation control method of claim 1, characterized in that, include: The first detection module is used to detect the first purity of the first material on the first discharge belt using an online tobacco structure detection system. The reduction module is used to reduce the initial material flow rate entering the primary air classifier if the first purity is less than the first purity threshold. The second detection module is used to detect whether the flow rate of the third material on the third discharge belt is greater than the flow rate threshold using a laser scanning online material flow testing system. The boosting module is used to increase the airflow of the air inlet if the flow rate of the third material on the third discharge belt is greater than the flow rate threshold, and to detect the purity of the second material on the second discharge belt in real time. When the purity of the second material on the second discharge belt is less than the first purity threshold but greater than the second purity threshold, the airflow of the air inlet is increased until the purity of the second material on the second discharge belt is greater than or equal to the first purity threshold.

4. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the tobacco flexible air separation control method as described in any one of claims 1 to 2.

5. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by the computer's processor, causes the computer to perform the tobacco flexible air separation control method as described in any one of claims 1 to 2.

Images