Medicated device and cigarette production system
By incorporating a drug supply mechanism, a replenishment mechanism, a mixing pipeline, and a concentration monitoring device into the drug dosing unit, the problem of unstable drug concentration was solved, enabling precise control of the finished drug concentration and improving the quality of cigarette production and the operating efficiency of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA TOBACCO SICHUAN IND CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-07
AI Technical Summary
In traditional dosing devices, the concentration of the dosing agent can easily change during the replenishment process after the agent is depleted, leading to non-compliance with cigarette production quality standards.
A dosing device was designed, comprising a dosing mechanism, a replenishing mechanism, a mixing pipeline, a return pipeline, and a concentration monitoring device. By monitoring the concentration of the finished drug in the return pipeline, the dosing mechanism adjusts the delivery rate of the drug concentrate to ensure that the concentration of the finished drug received by downstream equipment meets the requirements.
It achieves precise control over the concentration of finished drug, improves the quality of cigarette production, reduces the storage space requirement for the drug, and ensures that the drug concentration meets the requirements within ±0.5%.
Smart Images
Figure CN224462642U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of cigarette production, and in particular to a dosing device and a cigarette production system. Background Technology
[0002] In the cigarette production process, some steps involve adding chemicals to give the cigarettes anti-corrosion and anti-mildew properties, as well as improving their taste. Traditionally, a chemical dosing device is used to add chemicals during the corresponding production steps. When the chemicals in the device are depleted, they need to be replenished. During this replenishment process, the concentration of the chemicals may change, causing the concentration of chemicals added by the dosing device to not meet the specifications, thus affecting the quality of the cigarettes produced. Utility Model Content
[0003] Therefore, it is necessary to provide a dosing device and cigarette production system to address the problem that the concentration of the added agent in the dosing device of the traditional technology does not meet the requirements, thus affecting the quality of cigarette production.
[0004] The technical solution is as follows:
[0005] One embodiment provides a dosing device, comprising:
[0006] A drug supply mechanism, wherein the drug supply mechanism has a dilution chamber containing a diluent liquid;
[0007] A drug replenishment mechanism is connected to the dilution chamber and is used to deliver a drug concentrate to the dilution chamber. The drug concentrate can be mixed with the diluent to form a diluted drug.
[0008] A mixing pipeline through which a conveying liquid flows, a dilution chamber connected to the mixing pipeline, wherein the diluent can be mixed with the conveying liquid in the mixing pipeline to form a finished product, and the mixing pipeline is used to convey the finished product to downstream equipment;
[0009] A reflux line, one end of which is connected to the mixing line, and the other end of which is connected to the dilution chamber; and
[0010] A concentration monitoring device is installed in the return pipeline and is used to monitor the concentration of the finished drug in the return pipeline;
[0011] Specifically, when the concentration of the drug is less than a preset concentration, the drug replenishment mechanism increases the delivery volume of the drug concentrate; when the concentration of the drug is less than the preset concentration, the drug replenishment mechanism decreases the delivery volume of the drug concentrate.
[0012] In the aforementioned dosing device, the replenishing mechanism delivers the drug concentrate to the dilution chamber of the supply mechanism. The drug concentrate mixes with the diluent to form a diluted drug. The diluted drug then mixes with the liquid in the mixing pipeline to form a finished drug. A portion of the finished drug is delivered to downstream equipment, while the other portion flows back to the dilution chamber through the return pipeline. Since both the finished drug delivered to downstream equipment and the finished drug flowing back to the dilution chamber originate from the mixing pipeline, the concentration monitoring device only needs to monitor the concentration of the portion of the finished drug flowing back to the dilution chamber to obtain the concentration of the finished drug delivered to downstream equipment. By comparing the concentration of the finished drug with a preset concentration, the amount of drug concentrate delivered by the replenishing mechanism to the dilution chamber can be adjusted, thereby ensuring that the concentration of the finished drug delivered to downstream equipment meets the requirements and improving the quality of cigarette production.
[0013] In one embodiment, the drug replenishment mechanism includes a drug replenishment container, a drug replenishment pipeline, and a first metering pump. The drug replenishment container has a drug replenishment chamber for storing the drug concentrate. The drug replenishment pipeline connects the drug replenishment chamber and the dilution chamber. The first metering pump is located in the drug replenishment pipeline and is electrically connected to the concentration monitoring device.
[0014] In one embodiment, the drug supply mechanism includes a drug supply container and a replenishment device. The drug supply container has the dilution chamber, and the replenishment device is in communication with the dilution chamber and is used to deliver the diluent into the dilution chamber.
[0015] In one embodiment, the drug supply mechanism further includes a level gauge disposed within the dilution chamber and electrically connected to the replenishment component.
[0016] In one embodiment, the replenishment component includes a replenishment pipe and a replenishment valve. The replenishment pipe is connected to the dilution chamber, and the replenishment valve is located in the replenishment pipe and electrically connected to the level gauge.
[0017] In one embodiment, the drug supply mechanism further includes a stirring module disposed within the dilution chamber, the stirring module being used to stir the diluent liquid and the drug stock solution.
[0018] In one embodiment, the stirring module includes a rotating shaft, a driving component, and stirring blades. The rotating shaft is disposed within the dilution chamber, the driving component is disposed within the drug supply container and is used to drive the rotating shaft to rotate, and the stirring blades are disposed on the side wall of the rotating shaft.
[0019] In one embodiment, the dosing device further includes a mixer disposed in the mixing line and located upstream of the return line, and the dosing mechanism includes a delivery line connecting the dilution chamber and the mixer, the mixer being used to mix the diluted drug and the delivery liquid to form the finished drug.
[0020] In one embodiment, the drug supply mechanism further includes a second metering pump located in the delivery pipeline, and the drug dosing device further includes a flow meter located in the mixing pipeline and downstream of the return pipeline, the flow meter being electrically connected to the second metering pump.
[0021] Another embodiment provides a cigarette production system that includes a dosing device as described in any of the above embodiments.
[0022] In the aforementioned cigarette production system, the replenishing mechanism delivers the raw drug solution to the dilution chamber of the supply mechanism. The raw drug solution mixes with the diluent to form a diluted drug solution. The diluted drug solution then mixes with the liquid in the mixing pipeline to form the finished drug solution. A portion of the finished drug solution is delivered to downstream equipment, while the other portion flows back to the dilution chamber through a return pipeline. Since both the finished drug solution delivered to downstream equipment and the finished drug solution flowing back to the dilution chamber originate from the mixing pipeline, the concentration monitoring device only needs to monitor the concentration of the portion of the finished drug solution flowing back to the dilution chamber to obtain the concentration of the finished drug solution delivered to downstream equipment. By comparing the concentration of the finished drug solution with the preset concentration, the amount of raw drug solution delivered by the replenishing mechanism to the dilution chamber can be adjusted, thereby ensuring that the concentration of the finished drug solution delivered to downstream equipment meets the requirements and improving the quality of cigarette production. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.
[0024] Figure 1 This is a schematic diagram of a dosing device in one embodiment of this application.
[0025] Attached image annotations:
[0026] 100. Drug supply mechanism; 110. Dilution chamber; 120. Liquid replenishment device; 130. Stirring module; 140. Delivery pipeline; 150. Second metering pump; 200. Drug replenishment mechanism; 210. Drug replenishment chamber; 220. Drug replenishment pipeline; 230. First metering pump; 300. Mixing pipeline; 400. Return pipeline; 500. Concentration monitoring device; 600. PLC controller; 700. Mixer; 800. Flow meter. Detailed Implementation
[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0033] Please see Figure 1One embodiment of this application provides a dosing device, including a dosing mechanism 100, a replenishing mechanism 200, a mixing pipeline 300, a return pipeline 400, and a concentration monitoring device 500; the dosing mechanism 100 has a dilution chamber 110 containing a diluent; the replenishing mechanism 200 is connected to the dilution chamber 110 and is used to deliver a drug concentrate to the dilution chamber 110, the drug concentrate being able to mix with the diluent to form a diluted drug; the mixing pipeline 300 contains a delivery liquid, and the dilution chamber 110 is connected to the mixing pipeline 300, the diluted drug being able to mix with the mixing pipeline 300. The liquids in the mixing pipeline 300 are mixed to form a finished drug, and the mixing pipeline 300 is used to transport the finished drug to downstream equipment; one end of the return pipeline 400 is connected to the mixing pipeline 300, and the other end of the return pipeline 400 is connected to the dilution chamber 110; a concentration monitoring device 500 is installed in the return pipeline 400, and the concentration monitoring device 500 is used to monitor the concentration of the finished drug in the return pipeline 400; wherein, when the drug concentration is less than the preset concentration, the replenishing mechanism 200 increases the delivery volume of the drug stock solution; when the drug concentration is less than the preset concentration, the replenishing mechanism 200 decreases the delivery volume of the drug stock solution.
[0034] In the aforementioned dosing device, the replenishing mechanism 200 delivers the original drug solution to the dilution chamber 110 of the supply mechanism 100. The original drug solution is mixed with the diluent to form a diluted drug solution. The diluted drug solution is then mixed with the liquid in the mixing pipeline 300 to form a finished drug solution. A portion of the finished drug solution is delivered to downstream equipment, while the other portion flows back to the dilution chamber 110 through the return pipeline 400. Since both the finished drug solution delivered to the downstream equipment and the finished drug solution flowing back to the dilution chamber 110 originate from the mixing pipeline 300, the concentration monitoring device 500 only needs to monitor the concentration of the portion of the finished drug solution flowing back to the dilution chamber 110 to obtain the concentration of the finished drug solution delivered to the downstream equipment. By comparing the concentration of the finished drug solution with the preset concentration, the amount of original drug solution delivered by the replenishing mechanism 200 to the dilution chamber 110 is adjusted, thereby ensuring that the concentration of the finished drug solution delivered to the downstream equipment meets the requirements, thus improving the quality of cigarette production.
[0035] To explain, the original drug solution is a high-concentration drug. The replenishing mechanism 200 delivers the high-concentration original drug solution to the dilution chamber 110 of the supply mechanism 100. The diluent in the dilution chamber 110 can dilute the original drug solution to obtain a diluted drug solution. The concentration of the diluted drug solution is lower than that of the original drug solution. Subsequently, the supply mechanism 100 delivers the diluted drug solution to the mixing pipeline 300. Since there is a conveying liquid flowing in the mixing pipeline 300, the conveying liquid can further dilute the diluted drug solution to obtain a finished drug solution with an even lower concentration. The mixing pipeline 300 delivers the finished drug solution to downstream equipment for adding drugs to the corresponding equipment in the cigarette production system.
[0036] Furthermore, the liquid transported in the mixing pipeline 300 can not only further dilute the diluent, but also transport the active ingredients in the diluent to downstream equipment to achieve dosing.
[0037] In one embodiment, the mixing pipeline 300 is a high-pressure pipeline. Using a high-pressure pipeline can improve the conveying power of the finished drug, so that the finished drug in the mixing pipeline 300 can overcome the resistance in the mixing pipeline 300 when it flows, avoiding the phenomenon that the flow rate of the finished drug will decrease or even stop due to excessive resistance, and ensuring that the finished drug can be delivered to the designated downstream equipment.
[0038] For example, the diluent and the delivery liquid in the above embodiments are both water; the pharmaceutical stock can be a humectant, preservative, etc., and there is no specific limitation here.
[0039] For example, the concentration monitoring device 500 can be an ultrasonic monitor, a conductivity monitor, or a multi-wavelength ultraviolet absorption spectrometer, as long as it can monitor the concentration of the finished drug in the return pipeline 400. No specific limitation is made here.
[0040] Understandably, since the flow rate of the finished drug in the mixing pipeline 300 is relatively fast, while the flow rate of the finished drug in the return pipeline 400 is relatively slow, the monitoring response time left for the concentration monitoring device 500 is longer, thereby improving the accuracy of the concentration monitoring device 500 in monitoring the concentration of the finished drug.
[0041] In addition, the high flow rate of the finished drug may cause erosion and wear on the monitoring probe of the concentration monitoring device 500, resulting in a decrease in monitoring sensitivity. In this embodiment, the concentration monitoring device 500 is set in the return pipeline 400 where the flow rate of the finished drug is relatively slow, which can avoid erosion and wear on the monitoring probe of the concentration monitoring device 500 and improve the monitoring accuracy.
[0042] Furthermore, placing the concentration monitoring device 500 in the return pipeline 400 can reduce the feedback delay between the concentration monitoring device 500 and the drug replenishment mechanism 200 to a certain extent, thereby improving the concentration accuracy of the finished drug. According to calculations, this setting can reduce the feedback delay to within 30 seconds.
[0043] Please see Figure 1 In one embodiment, the drug replenishment mechanism 200 includes a drug replenishment container, a drug replenishment pipeline 220, and a first metering pump 230. The drug replenishment container has a drug replenishment chamber 210 for storing the drug concentrate. The drug replenishment pipeline 220 connects the drug replenishment chamber 210 and the dilution chamber 110. The first metering pump 230 is located in the drug replenishment pipeline 220 and is electrically connected to the concentration monitoring device 500.
[0044] The first metering pump 230 can transport the drug concentrate in the replenishment chamber 210 to the dilution chamber 110 through the replenishment pipeline 220 to dilute the drug concentrate and form a diluted drug. The first metering pump 230 is electrically connected to the concentration monitoring device 500. When the concentration monitoring device 500 detects that the concentration of the finished drug is lower than the preset concentration, it sends a signal to the first metering pump 230, which increases the flow rate of the drug concentrate to make the concentration of the diluted drug higher, thereby increasing the concentration of the finished drug. Correspondingly, when the concentration monitoring device 500 detects that the concentration of the finished drug is higher than the preset concentration, it sends a signal to the first metering pump 230, which decreases the flow rate of the drug concentrate to make the concentration of the diluted drug lower, thereby reducing the concentration of the finished drug. With this configuration, the concentration of the finished drug can be controlled through the cooperation between the concentration monitoring device 500 and the first metering pump 230, ensuring that the concentration of the finished drug output to downstream equipment meets the standard.
[0045] Furthermore, in traditional technologies, a large amount of drug storage space is usually required to meet the needs of drug use at different concentrations. In this embodiment, the concentration of the finished drug can be adjusted by adjusting the delivery flow rate of the first metering pump 230, eliminating the need for additional drug storage space and reducing the space occupancy rate by more than 50%.
[0046] In one embodiment, the dosing device further includes a PLC controller 600, which is electrically connected to the concentration monitoring device 500. The PLC is used to receive and process the data monitored by the concentration monitoring device 500.
[0047] In one embodiment, the return line 400 is equipped with a check valve.
[0048] In one embodiment, the drug supply mechanism 100 includes a drug supply container and a replenishment component 120. The drug supply container has a dilution chamber 110, and the replenishment component 120 is in communication with the dilution chamber 110. The replenishment component 120 is used to deliver diluent liquid into the dilution chamber 110.
[0049] The diluent in the dilution chamber 110 is replenished by the replenishing component 120, so as to replenish the diluent in the dilution chamber 110 when it is used for the first time or when it is used again after being shut down; during normal operation, the replenishing component 120 does not need to replenish the diluent in the dilution chamber 110.
[0050] Furthermore, the drug supply container includes a drug supply tank, and the replenishment component 120 is connected to the drug supply tank and can replenish the dilution liquid into the dilution chamber 110.
[0051] In one embodiment, the drug supply mechanism 100 further includes a level gauge disposed in the dilution chamber 110 and electrically connected to the replenishment component 120.
[0052] The level gauge can monitor the level of the diluent in the dilution chamber 110. When the level gauge detects that the level of the diluent is lower than the preset level, it sends a signal to the replenishment unit 120. After receiving the signal, the replenishment unit 120 delivers diluent to the dilution chamber 110 so that the level of the diluent reaches the preset level.
[0053] In one embodiment, the replenishment component 120 includes a replenishment pipe and a replenishment valve. The replenishment pipe is connected to the dilution chamber 110, and the replenishment valve is located in the replenishment pipe and electrically connected to the level gauge.
[0054] When the level gauge detects that the level of the diluted agent is lower than the preset level, it sends a signal to the replenishment valve. Upon receiving the signal, the replenishment valve opens to deliver diluted liquid into the dilution chamber 110 through the replenishment pipe, so that the level of the diluted agent reaches the preset level.
[0055] For illustrative purposes, one end of the replenishment tube is connected to the dilution chamber 110, and the other end is connected to a device capable of providing diluent; for example, when the diluent is water, the end of the replenishment tube away from the dilution chamber 110 is connected to a water pipe or a water storage container.
[0056] In addition, when the dosing device is started, there is no diluent in the dilution chamber 110. Therefore, after the replenishment mechanism 200 delivers the original drug solution to the dilution chamber 110, the replenishment valve opens to deliver the diluent into the dilution chamber 110 through the replenishment pipe, thereby providing the basic amount of drug for subsequent dosing.
[0057] In one embodiment, the drug supply mechanism 100 further includes a stirring module 130, which is disposed in the dilution chamber 110 and is used to stir the diluent liquid and the drug stock solution.
[0058] The stirring module 130 can improve the mixing efficiency and uniformity of the diluted liquid and the drug stock solution, thereby improving the concentration uniformity of the diluted drug.
[0059] In one embodiment, the stirring module 130 includes a rotating shaft, a driving component, and stirring blades. The rotating shaft is located inside the dilution chamber 110, the driving component is located in the drug supply container and is used to drive the rotating shaft to rotate, and the stirring blades are located on the side wall of the rotating shaft.
[0060] The drive unit drives the rotating shaft to rotate, thereby moving the stirring blades and achieving stirring of the diluted liquid and the original drug solution.
[0061] Furthermore, at least two stirring blades are provided, and the at least two stirring blades are spaced apart on the side wall of the rotating shaft around the axis of rotation to improve the uniformity of stirring.
[0062] In other embodiments, at least two stirring blades may also be spaced apart along the axis of rotation, which will not be described in detail here.
[0063] In one embodiment, the medicine chamber 210 is also provided with a component for stirring, similar to that of the stirring module 130.
[0064] In one embodiment, the dosing device further includes a mixer 700, which is disposed in the mixing line 300 and located upstream of the return line 400. The dosing mechanism 100 includes a delivery line 140, which connects the dilution chamber 110 and the mixer 700. The mixer 700 is used to mix the diluted drug and the delivery liquid to form the finished drug.
[0065] The diluent in the dilution chamber 110 can enter the mixer 700 through the delivery pipeline 140. The mixer 700 mixes the liquid delivered by the mixing pipeline 300 with the diluent to form a finished product, thereby improving the uniformity of the composition of the finished product.
[0066] As an example, the mixer 700 is a pipeline mixer 700. Furthermore, the mixer 700 adopts a static spiral blade type pipeline mixer 700, which has a simple structure and good mixing effect, so that the conveyed liquid and the diluent can be fully mixed.
[0067] In one embodiment, the drug supply device 100 further includes a second metering pump 150, which is located in the delivery pipeline 140. The drug dosing device also includes a flow meter 800, which is located in the mixing pipeline 300 and downstream of the return pipeline 400. The flow meter 800 is electrically connected to the second metering pump 150.
[0068] The flow meter 800 installed in the mixing pipeline 300 can monitor the flow rate of the finished drug delivered to the downstream equipment. When the flow rate of the finished drug is less than the preset flow rate, a signal is sent to the second metering pump 150, which increases the flow rate of the diluted drug, thereby increasing the flow rate of the finished drug. Conversely, when the flow meter 800 monitors the flow rate of the finished drug to be greater than the preset flow rate, a signal is sent to the second metering pump 150, which decreases the flow rate of the diluted drug. This configuration can improve the accuracy of the flow rate of the finished drug delivered to the downstream equipment.
[0069] Furthermore, the second metering pump 150 is a high-pressure plunger pump. The high-pressure plunger pump adopts a pressure-resistant pump body and can be directly connected to the pressurized mixing pipeline 300.
[0070] Furthermore, it also includes a pulse damper, which is used to reduce pressure fluctuations in the mixing line 300 during the delivery of the finished drug.
[0071] In one embodiment, the dosing device operates as follows:
[0072] Initial stage: Upon system startup, the first metering pump 230 draws the concentrate from the replenishment chamber 210 according to a preset ratio and injects it into the dilution chamber 110. This preset ratio is precisely calculated based on parameters such as the target dilution concentration and the volume of the dilution chamber 110, aiming to provide a suitable base amount of reagent for subsequent dilution operations.
[0073] Dilution Stage: After the drug concentrate is injected into the dilution chamber 110, the system monitors the liquid level in the tank in real time using a level gauge integrated within the dilution chamber 110. When the liquid level does not reach the set value, the replenishment valve opens, adding an appropriate amount of diluent to the tank until the liquid level reaches the preset height. During this process, the stirring module 130 in the dilution chamber 110 starts simultaneously, continuously stirring to ensure that the drug concentrate and the replenished diluent are fully mixed, achieving uniform dilution and ensuring consistent drug concentration within the tank.
[0074] During the dosing phase: Flow meter 800 monitors the flow rate of the finished chemical agent in mixing pipeline 300 in real time and transmits this signal to PLC controller 600. Second metering pump 150 receives instructions from PLC controller 600 and precisely adjusts its output flow rate according to the flow rate changes of the finished chemical agent in mixing pipeline 300. At this time, second metering pump 150 delivers the diluted chemical agent to mixer 700 at a stable pressure and flow rate, ensuring thorough mixing of the diluted chemical agent with the fluid in the pipeline. Simultaneously, return pipeline 400 connecting mixing pipeline 300 and dilution chamber 110 is opened, laying the foundation for maintaining the system's hydraulic balance.
[0075] Feedback Adjustment: The concentration monitoring device 500 continuously monitors the finished drug entering the dilution chamber 110 of the drug supply container in real time, and transmits the monitored concentration data to the PLC controller 600 in real time in the form of electrical or digital signals. The PLC controller 600 has a built-in advanced PID algorithm program, which quickly compares the received actual concentration data with the preset target concentration value to calculate the concentration deviation value. Based on this deviation value, the PID algorithm program quickly adjusts the control signal and dynamically corrects the stroke frequency of the first metering pump 230. When the actual concentration is lower than the target concentration, the stroke frequency of the first metering pump 230 is increased, and the dosage of the drug concentrate is increased; conversely, when the actual concentration is higher than the target concentration, the stroke frequency of the first metering pump 230 is decreased, and the dosage of the drug concentrate is reduced, thereby ensuring that the concentration of the diluted drug in the dilution chamber 110 is always maintained within the target range.
[0076] Balance Maintenance: During the dosing process, the dosing device is always in a dynamic operating state. The flow rate of the diluted agent delivered by the second metering pump 150 to the mixer 700 is Qconsumption, the flow rate of the finished agent returning to the dilution chamber 110 through the return pipeline 400 is Qreturn, and the flow rate of the concentrate delivered by the first metering pump 230 to the dilution chamber 110 is Qdosing. Through a PID algorithm, the algorithm parameter Kp is set, and Qconsumption and Qreturn increase or decrease synchronously, that is: Qconsumption = Kp * Qreturn.
[0077] As the dosing process progresses, when a balance is reached between Q_recirculation, Q_dosing, and Q_consumption (i.e., Q_consumption = Q_dosing + Q_recirculation), the liquid level in dilution chamber 110 remains stable and no longer changes significantly. At this point, the entire dosing system enters a steady-state operation phase, capable of continuously and stably providing downstream equipment with precisely concentrated finished reagents to meet the needs of process production within the pipeline.
[0078] As an example, the control logic of the dosing device is as follows:
[0079] Python
[0080] whileTrue:
[0081] actual_conc=sensor.read_value()
[0082] ifactual_conc <setpoint:
[0083] pump1.speed+=(setpoint-actual_conc)*Kp
[0084] elifactual_conc>setpoint:
[0085] pump1.speed-=(actual_conc-setpoint)*Ki
[0086] adjust_pump2(pipeline_pressure)
[0087] ```
[0088] In the code above, "sensor" represents concentration monitoring device 500, "pump1" is the first metering pump 230, "pump2" is the second metering pump 150, "setpoint" is the preset finished drug concentration value, "Kp" and "Ki" are parameters in the PID algorithm, and the "adjust_pump2" function is used to adjust the output of the second metering pump 150 according to the flow rate obtained by the flow meter 800.
[0089] Using the dosing device in this embodiment can significantly improve the concentration control of the finished drug, reaching ±0.5%, so as to better meet the strict requirements of downstream equipment for the concentration of the finished drug.
[0090] Another embodiment of this application provides a cigarette production system, which includes a dosing device as described in any of the above embodiments.
[0091] In the aforementioned cigarette production system, the replenishing mechanism 200 delivers the original drug solution to the dilution chamber 110 of the supply mechanism 100. The original drug solution is mixed with the diluent to form a diluted drug solution. The diluted drug solution is then mixed with the liquid in the mixing pipeline 300 to form a finished drug solution. A portion of the finished drug solution is delivered to downstream equipment, while the other portion flows back to the dilution chamber 110 via the return pipeline 400. Since both the finished drug solution delivered to downstream equipment and the finished drug solution flowing back to the dilution chamber 110 originate from the mixing pipeline 300, the concentration monitoring device 500 only needs to monitor the concentration of the portion of the finished drug solution flowing back to the dilution chamber 110 to obtain the concentration of the finished drug solution delivered to downstream equipment. By comparing the concentration of the finished drug solution with the preset concentration, the amount of original drug solution delivered by the replenishing mechanism 200 to the dilution chamber 110 is adjusted, thereby ensuring that the concentration of the finished drug solution delivered to downstream equipment meets the requirements, thus improving the quality of cigarette production.
[0092] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0093] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A dosing device, characterized in that, include: A drug supply mechanism, wherein the drug supply mechanism has a dilution chamber containing a diluent liquid; A drug replenishment mechanism is connected to the dilution chamber and is used to deliver a drug concentrate to the dilution chamber. The drug concentrate can be mixed with the diluent to form a diluted drug. A mixing pipeline through which a conveying liquid flows, a dilution chamber connected to the mixing pipeline, wherein the diluent can be mixed with the conveying liquid in the mixing pipeline to form a finished product, and the mixing pipeline is used to convey the finished product to downstream equipment; A reflux line, one end of which is connected to the mixing line, and the other end of which is connected to the dilution chamber; and A concentration monitoring device is provided in the return pipeline and is used to monitor the concentration of the finished drug in the return pipeline; Specifically, when the concentration of the drug is less than a preset concentration, the drug replenishment mechanism increases the delivery volume of the drug concentrate; when the concentration of the drug is less than the preset concentration, the drug replenishment mechanism decreases the delivery volume of the drug concentrate.
2. The dosing device according to claim 1, characterized in that, The drug replenishment mechanism includes a drug replenishment container, a drug replenishment pipeline, and a first metering pump. The drug replenishment container has a drug replenishment chamber for storing the drug concentrate. The drug replenishment pipeline connects the drug replenishment chamber and the dilution chamber. The first metering pump is located in the drug replenishment pipeline and is electrically connected to the concentration monitoring device.
3. The dosing device according to claim 1, characterized in that, The drug supply mechanism includes a drug supply container and a replenishment device. The drug supply container has the dilution chamber, and the replenishment device is connected to the dilution chamber. The replenishment device is used to deliver the diluent into the dilution chamber.
4. The dosing device according to claim 3, characterized in that, The drug supply mechanism also includes a level gauge, which is located inside the dilution chamber and electrically connected to the replenishment component.
5. The dosing device according to claim 4, characterized in that, The replenishment component includes a replenishment pipe and a replenishment valve. The replenishment pipe is connected to the dilution chamber, and the replenishment valve is located on the replenishment pipe and electrically connected to the level gauge.
6. The dosing device according to claim 3, characterized in that, The drug supply mechanism also includes a stirring module, which is located inside the dilution chamber and is used to stir the diluent liquid and the drug stock solution.
7. The dosing device according to claim 6, characterized in that, The stirring module includes a rotating shaft, a driving component, and stirring blades. The rotating shaft is located inside the dilution chamber, the driving component is located in the drug supply container and is used to drive the rotating shaft to rotate, and the stirring blades are located on the side wall of the rotating shaft.
8. The dosing device according to claim 1, characterized in that, The dosing device further includes a mixer, which is disposed in the mixing pipeline and located upstream of the return pipeline. The drug supply mechanism includes a delivery pipeline that connects the dilution chamber and the mixer. The mixer is used to mix the diluted drug and the delivery liquid to form the finished drug.
9. The dosing device according to claim 8, characterized in that, The drug supply mechanism further includes a second metering pump, which is located in the delivery pipeline. The drug dosing device also includes a flow meter, which is located in the mixing pipeline and downstream of the return pipeline. The flow meter is electrically connected to the second metering pump.
10. A cigarette production system, characterized in that, The cigarette production system includes a dosing device as described in any one of claims 1-9.