An automatic precise dosing system

Abstract

The utility model relates to a dosing technical field, and disclose an automatic precision dosing system, including first dosing agitator, first PLC control box and second dosing agitator, the inside fixed mounting of first dosing agitator has first liquid level meter, and first liquid level meter and first PLC control box are electrically connected through control line between them. The utility model discloses through the classic PID control algorithm innovation application in dressing dosing system, through dynamic adjustment proportion, integral, differential parameter, establishes accurate balance mechanism between system response speed and overshoot, and this closed loop control system takes flowmeter real -time feedback as input signal, and after PID controller operation, exports accurate multiple solenoid valve opening degree control instruction, compares traditional open loop control mode, and realizes the leap of dosing quantity from discrete adjustment to continuous accurate control, and through on -the -spot debugging setting PID parameter.

Description

Technical Field

[0001] This utility model relates to the field of drug dosing technology, and more specifically, to an automatic precision drug dosing system. Background Technology

[0002] Traditional mineral processing reagent dosing involves three coordinated stages: dosing, mixing, and replenishment. The dosing stage relies on the height difference between the storage tank and the production process to achieve gravity flow of the reagents. The flow rate is controlled manually by adjusting valve openings to meet process requirements. The mixing stage involves adding water and reagents in a mixing tank according to a specific ratio, mixing them to prepare a ready-to-use solution. The replenishment process uses a pump to deliver the reagents from the mixing tank to the storage tank. Operators must continuously monitor the tank level, initiating replenishment when it falls below the lower limit and stopping when it reaches the upper limit. Simultaneously, valves must be switched to flexibly connect multiple mixing tanks and storage tanks. This process is highly dependent on manual experience, and valve adjustment and level monitoring both employ open-loop control, leading to risks of flow fluctuations, response lag, and reagent spillage. Automation upgrades are needed to improve system stability. Existing dosing systems use manual valve adjustment to control the dosage, but this operation suffers from significant lag and discrete adjustments. Because on-site personnel cannot continuously monitor flow meter parameters, the dosing accuracy is low and the fluctuation range is large. To address this issue, some technical modifications included adding a dosing pump to the drug storage tank, adjusting the flow rate by regulating the motor speed. However, this solution remains an open-loop control system, lacking a closed-loop feedback mechanism, making system stability difficult to guarantee. During the replenishment process, manual monitoring of the tank level is required, posing a risk of overflow or depletion of the drug. Furthermore, after replenishment, the dispensing personnel must be manually notified to prepare the new drug, making the process dependent on manual intervention. These problems result in both control precision deficiencies and increased operational risks due to high reliance on manual intervention. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides an automatic precision dosing system with the advantage of real-time monitoring and adjustment during the dosing and replenishment process.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic precision dosing system, comprising a first dosing mixing tank, a first PLC control box, and a second dosing mixing tank. A first level gauge is fixedly installed inside the first dosing mixing tank, and the first level gauge is electrically connected to the first PLC control box via a control line. A second level gauge is fixedly installed inside the second dosing mixing tank, and the first level gauge is electrically connected to the first PLC control box via a control line. The second dosing mixing tank is fixedly connected to a second solenoid valve via a pipeline. The second solenoid valve is electrically connected to a first dosing alarm and a second dosing alarm via a control line. The first dosing mixing tank is fixedly connected to the first solenoid valve via a pipeline, and the first solenoid valve, the main solenoid valve, and the second solenoid valve are fixedly connected via pipelines.

[0005] In a preferred embodiment of this utility model, the first solenoid valve and the main solenoid valve are electrically connected by a control line. The main solenoid valve is fixedly connected to the third and fourth solenoid valves via pipes. The third solenoid valve is fixedly connected to the first medicine storage tank via a pipe. A third level gauge is fixedly installed inside the first medicine storage tank. The third level gauge is fixedly connected to the first flow meter via a pipe. The first flow meter is fixedly connected to the fifth solenoid valve via a pipe. The fourth solenoid valve is fixedly connected to the second medicine storage tank via a pipe.

[0006] As a preferred embodiment of this utility model, a fourth liquid level gauge is fixedly installed inside the second medicine storage tank. The fourth liquid level gauge is fixedly connected to the second flow meter by a pipe, and the second flow meter is fixedly connected to the sixth solenoid valve by a pipe.

[0007] As a preferred embodiment of this utility model, the first PLC control box is electrically connected to the third and fourth solenoid valves via control lines, and the first and second level gauges are electrically connected to the third and fourth level gauges via control lines.

[0008] As a preferred embodiment of this utility model, the first flow meter and the second flow meter are electrically connected to the second PLC control box via control lines, and the second PLC control box is electrically connected to the fifth solenoid valve and the sixth solenoid valve via control lines.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. This utility model innovatively applies the classic PID control algorithm to a mineral processing reagent dosing system. By dynamically adjusting the proportional, integral, and derivative parameters, a precise balance mechanism is established between the system response speed and overshoot. This closed-loop control system uses real-time feedback from the flow meter as the input signal, and outputs precise control commands for multiple solenoid valve openings after calculation by the PID controller. Compared with the traditional open-loop control mode, it achieves a leap from discrete adjustment to continuous and precise control of reagent dosage. By adjusting the PID parameters on-site, the system can automatically adapt to process fluctuations, ensuring adjustment sensitivity while controlling the overshoot within the allowable range of the process. This minimizes the deviation between the reagent dosage and the theoretical set value, significantly improving the stability of mineral processing indicators and increasing the matching degree between reagent consumption and process requirements in actual production.

[0011] 2. This utility model intelligently transforms the mineral processing chemical dosing system using a PLC industrial controller, constructing a distributed control architecture based on industrial Ethernet. The system uses two PLCs as its core, upgrading all original manual valves to solenoid valves. The fifth and sixth solenoid valves integrate PID control modules, forming high-precision execution units. By deploying a sensor network including level gauges and flow meters, the system achieves real-time acquisition of process parameters with a 100-millimeter sampling period. Combined with an improved PID control algorithm, discrete control is transformed into quasi-continuous control, shortening the response time for chemical dosing adjustment. The dispatch room remotely monitors key parameters such as chemical dosing flow rate and tank level, and has remote parameter tuning and emergency intervention functions. Attached Figure Description

[0012] Figure 1 This is a block diagram of the first PLC control box of the system of this utility model;

[0013] Figure 2 This is a block diagram of the second PLC control box of the system of this utility model.

[0014] In the diagram: 1. First mixing tank; 2. First level gauge; 3. Second mixing tank; 4. Second level gauge; 5. First solenoid valve; 6. Main solenoid valve; 7. Second solenoid valve; 8. First PLC control box; 9. First mixing alarm; 10. Second mixing alarm; 11. Third solenoid valve; 12. Fourth solenoid valve; 13. First storage tank; 14. Third level gauge; 15. First flow meter; 16. Fifth solenoid valve; 17. Second storage tank; 18. Fourth level gauge; 19. Second flow meter; 20. Sixth solenoid valve; 21. Second PLC control box;

[0015] a. First process flow; b. Second process flow. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1 to 2 As shown, this utility model provides an automatic precision dosing system, including a first mixing tank 1, a first PLC control box 8, and a second mixing tank 3. A first level gauge 2 is fixedly installed inside the first mixing tank 1, and the first level gauge 2 is electrically connected to the first PLC control box 8 via a control line. A second level gauge 4 is fixedly installed inside the second mixing tank 3, and the first level gauge 2 is electrically connected to the first PLC control box 8 via a control line. The second mixing tank 3 is fixedly connected to a second solenoid valve 7 via a pipeline. The second solenoid valve 7 is electrically connected to a first dosing alarm 9 and a second dosing alarm 10 via a control line. The first mixing tank 1 is fixedly connected to a first solenoid valve 5 via a pipeline, and the first solenoid valve 5, the main solenoid valve 6, and the second solenoid valve 7 are fixedly connected via pipelines.

[0018] The system uses the second PLC control box 21 and the first PLC control box 8 as the core control units. The fifth solenoid valve 16 and the sixth solenoid valve 20 integrate PID regulation functions to form a dual-mode actuator. In the precision dosing stage, the first PLC control box 8 and the second PLC control box 21 use the real-time feedback signals from the first flow meter 15 and the second flow meter 19 to adopt an improved PID control algorithm based on empirical formulas. Through the parameter adaptive tuning mechanism, the system oscillations that are easily caused by pure PID control are suppressed, and a dynamic balance is established between response speed and control accuracy to ensure that the dosing amount matches the process requirements in real time.

[0019] The medication replenishment process employs a four-stage liquid level monitoring strategy: The first PLC control box 8 presets the normal upper and lower limits and alarm thresholds for the liquid levels of the first and second medicine storage tanks 13 and 17. Millimeter-level precision monitoring is implemented through the third and fourth level gauges 14 and 18. When the liquid level falls below the lower limit, the system automatically opens the first solenoid valve 5, the second solenoid valve 7, the third solenoid valve 11, the fourth solenoid valve 12, and the main solenoid valve 6 to replenish the medication. It immediately closes when the upper limit is reached. If the liquid level exceeds the lower-lower limit or the upper-upper limit threshold, an audible and visual alarm is triggered, and the fifth solenoid valve 16 and... The sixth solenoid valve 20 prevents accidents such as drug interruption or overflow. In the drug preparation process, intelligent early warning is achieved through the second level gauge 4 and the second drug preparation mixing tank 3 and the first drug preparation mixing tank 1 in the first level gauge 2. When the liquid level of the first level gauge 2 and the second level gauge 4 is lower than the safety threshold, the first drug preparation alarm 9 and the second drug preparation alarm 10 are automatically activated and push mobile terminal notifications to remind operators to prepare spare drugs in time. The whole system constructs a digital control system for the entire process of drug addition, replenishment and preparation, which significantly improves the automation level of mineral processing reagent management and production safety.

[0020] This innovative application of classic PID control algorithms to a mineral processing reagent dosing system establishes a precise balance between system response speed and overshoot by dynamically adjusting proportional, integral, and derivative parameters. The closed-loop control system uses real-time feedback from the flow meter as input, which, after processing by the PID controller, outputs precise control commands for multiple solenoid valve openings. Compared to traditional open-loop control, this represents a leap from discrete adjustment to continuous and precise control of reagent dosage. Through on-site debugging and tuning of the PID parameters, the system can automatically adapt to process fluctuations, ensuring adjustment sensitivity while keeping overshoot within the allowable range. This minimizes the deviation between reagent dosage and theoretical setpoints, significantly improving the stability of mineral processing indicators and enhancing the match between actual reagent consumption and process requirements.

[0021] The mineral processing chemical dosing system was intelligently upgraded using a PLC industrial controller, constructing a distributed control architecture based on industrial Ethernet. The system uses two PLCs as its core, upgrading all original manual valves to solenoid valves. The fifth solenoid valve (16) and the sixth solenoid valve (20) integrate PID control modules, forming high-precision execution units. By deploying a sensor network including level gauges and flow meters, the system achieves real-time acquisition of process parameters with a 100-millimeter sampling period. Combined with an improved PID control algorithm, discrete control is transformed into quasi-continuous control, shortening the response time for chemical dosing adjustments. The dispatch room remotely monitors key parameters such as chemical dosing flow rate and tank level, and also features remote parameter tuning and emergency intervention functions.

[0022] The first solenoid valve 5 and the main solenoid valve 6 are electrically connected by a control line. The main solenoid valve 6 is fixedly connected to the third solenoid valve 11 and the fourth solenoid valve 12 through a pipeline. The third solenoid valve 11 is fixedly connected to the first medicine storage tank 13 through a pipeline. The third level gauge 14 is fixedly installed inside the first medicine storage tank 13. The third level gauge 14 is fixedly connected to the first flow meter 15 through a pipeline. The first flow meter 15 is fixedly connected to the fifth solenoid valve 16 through a pipeline. The fourth solenoid valve 12 is fixedly connected to the second medicine storage tank 17 through a pipeline.

[0023] The second medicine storage tank 17 is equipped with a fourth liquid level gauge 18, which is fixedly connected to the second flow meter 19 by a pipe. The second flow meter 19 is also fixedly connected to the sixth solenoid valve 20 by a pipe.

[0024] The first PLC control box 8 is electrically connected to the third solenoid valve 11 and the fourth solenoid valve 12 via control lines, and the first level gauge 2 and the second level gauge 4 are electrically connected to the third level gauge 14 and the fourth level gauge 18 via control lines.

[0025] The first flow meter 15 and the second flow meter 19 are electrically connected to the second PLC control box 21 via control lines, and the second PLC control box 21 is electrically connected to the fifth solenoid valve 16 and the sixth solenoid valve 20 via control lines.

[0026] Working principle and usage process of this utility model:

[0027] The system uses the second PLC control box 21 and the first PLC control box 8 as the core control units. The fifth solenoid valve 16 and the sixth solenoid valve 20 integrate PID regulation functions to form a dual-mode actuator. In the precision dosing stage, the first PLC control box 8 and the second PLC control box 21 use the real-time feedback signals from the first flow meter 15 and the second flow meter 19 to adopt an improved PID control algorithm based on empirical formulas. Through the parameter adaptive tuning mechanism, the system oscillations that are easily caused by pure PID control are suppressed, and a dynamic balance is established between response speed and control accuracy to ensure that the dosing amount matches the process requirements in real time.

[0028] The medication replenishment process employs a four-stage liquid level monitoring strategy: The first PLC control box 8 presets the normal upper and lower limits and alarm thresholds for the liquid levels of the first and second medicine storage tanks 13 and 17. Millimeter-level precision monitoring is implemented through the third and fourth level gauges 14 and 18. When the liquid level falls below the lower limit, the system automatically opens the first solenoid valve 5, the second solenoid valve 7, the third solenoid valve 11, the fourth solenoid valve 12, and the main solenoid valve 6 to replenish the medication. It immediately closes when the upper limit is reached. If the liquid level exceeds the lower-lower limit or the upper-upper limit threshold, an audible and visual alarm is triggered, and the fifth solenoid valve 16 and... The sixth solenoid valve 20 prevents accidents such as drug interruption or overflow. In the drug preparation process, intelligent early warning is achieved through the second level gauge 4 and the second drug preparation mixing tank 3 and the first drug preparation mixing tank 1 in the first level gauge 2. When the liquid level of the first level gauge 2 and the second level gauge 4 is lower than the safety threshold, the first drug preparation alarm 9 and the second drug preparation alarm 10 are automatically activated and push mobile terminal notifications to remind operators to prepare spare drugs in time. The whole system constructs a digital control system for the entire process of drug addition, replenishment and preparation, which significantly improves the automation level of mineral processing reagent management and production safety.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic precision dosing system, comprising a first dosing mixing tank (1), a first PLC control box (8) and a second dosing mixing tank (3), characterized in that: The first mixing tank (1) is equipped with a first level gauge (2), which is electrically connected to the first PLC control box (8) via a control line. The second mixing tank (3) is equipped with a second level gauge (4), which is electrically connected to the first PLC control box (8) via a control line. The second mixing tank (3) is also equipped with a second solenoid valve (7) via a pipeline. The second solenoid valve (7) is electrically connected to the first mixing alarm (9) and the second mixing alarm (10) via a control line. The first mixing tank (1) is also equipped with a first solenoid valve (5) via a pipeline. The first solenoid valve (5), the main solenoid valve (6), and the second solenoid valve (7) are also connected via a pipeline.

2. The automatic precision dosing system according to claim 1, characterized in that: The first solenoid valve (5) and the main solenoid valve (6) are electrically connected by a control line. The main solenoid valve (6) is fixedly connected to the third solenoid valve (11) and the fourth solenoid valve (12) through a pipe. The third solenoid valve (11) is fixedly connected to the first medicine storage tank (13) through a pipe. The first medicine storage tank (13) is fixedly installed with a third level gauge (14). The third level gauge (14) is fixedly connected to the first flow meter (15) through a pipe. The first flow meter (15) is fixedly connected to the fifth solenoid valve (16) through a pipe. The fourth solenoid valve (12) is fixedly connected to the second medicine storage tank (17) through a pipe.

3. The automatic precision dosing system according to claim 2, characterized in that: The second medicine storage tank (17) is fixedly installed with a fourth liquid level gauge (18). The fourth liquid level gauge (18) is fixedly connected to the second flow meter (19) by a pipe. The second flow meter (19) is fixedly connected to the sixth solenoid valve (20) by a pipe.

4. The automatic precision dosing system according to claim 1, characterized in that: The first PLC control box (8) is electrically connected to the third solenoid valve (11) and the fourth solenoid valve (12) via control lines. The first level gauge (2) and the second level gauge (4) are electrically connected to the third level gauge (14) and the fourth level gauge (18) via control lines.

5. An automatic precision dosing system according to claim 2, characterized in that: The first flow meter (15) and the second flow meter (19) are electrically connected to the second PLC control box (21) via control lines. The second PLC control box (21) is electrically connected to the fifth solenoid valve (16) and the sixth solenoid valve (20) via control lines.

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