Washing, selecting and dosing control system
By introducing real-time flow comparison between the central control module and the subtraction module, and gradually reducing the opening of the solenoid valve, the problem of inaccurate chemical dosing flow in the existing technology is solved, achieving more precise flow control and improving washing quality and production efficiency.
Patent Information
- Application Number
- CN202520453117.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-15
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-15
AI Technical Summary
The existing washing and dosing systems have limited accuracy in flow measurement devices, which leads to inaccurate dosing flow control, easily causing reagent overflow and waste, and affecting the washing and beneficiation effect.
The system incorporates a central control module, a subtraction module, a flow detection module, a solenoid valve control module, and a solenoid valve. The subtraction module compares and calculates the preset flow value with the actual flow value in real time, and gradually reduces the opening of the solenoid valve to achieve a smooth reduction in flow and avoid sudden changes in flow.
It improves the accuracy of flow control, ensures uniform distribution and full action of the reagent, enhances washing and screening quality, and reduces production costs and reagent waste.
Smart Images
Figure CN223931606U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of flow control technology, and in particular to a washing and dosing control system. Background Technology
[0002] In the washing and processing of resources such as coal and ore, the addition of reagents is a crucial step. By adding appropriate reagents, such as collectors, frothers, and flocculants, the washing effect can be significantly improved, the concentrate grade and recovery rate can be increased, and the impurity content can be reduced, thereby enhancing product quality and market competitiveness. For example, in coal washing, the appropriate addition of collectors can enhance the hydrophobicity of coal particles, making them easier to adhere to air bubbles, thus improving the recovery efficiency of clean coal; in ore flotation, the use of frothers can generate a stable foam layer, which helps in the enrichment and separation of mineral particles.
[0003] Currently, the flow measurement devices used in existing washing and dosing systems have limited accuracy. Existing flow control is inaccurate, typically stopping immediately after reaching the preset flow rate. Due to the large instantaneous flow, even rapid valve closure can lead to chemical overflow, resulting in unsatisfactory washing results and wasted chemicals.
[0004] Therefore, there is an urgent need for a stable and reliable washing and chemical dosing control system. Utility Model Content
[0005] This disclosure provides a washing and dosing control system to solve the problem of inaccurate washing and dosing control in existing systems.
[0006] This disclosure provides a washing and dosing control system, including:
[0007] Central control module, subtraction module, flow detection module, solenoid valve control module, and solenoid valve;
[0008] The central control module is connected to the in-phase input terminal of the subtraction module and the control terminal of the solenoid valve, respectively.
[0009] The central control module is used to connect to the washing and sorting equipment;
[0010] The inverting input terminal of the subtraction module is connected to the output terminal of the flow detection module, and the output terminal of the subtraction module is connected to the input terminal of the solenoid valve control module.
[0011] The output terminal of the solenoid valve control module is connected to the control terminal of the solenoid valve.
[0012] The flow detection module is connected to the solenoid valve.
[0013] In one exemplary embodiment of this disclosure, the subtraction module includes: resistors R1, R2, R3, and R4, and operational amplifier U1;
[0014] The output of the flow detection module is connected to the inverting input of the operational amplifier U1 through the resistor R1;
[0015] The central control module is connected to the non-inverting input terminal of the operational amplifier U1 through the resistor R2;
[0016] The non-inverting input terminal of the operational amplifier U1 is grounded through the resistor R3, and the output terminal of the operational amplifier U1 is connected to the inverting input terminal of the operational amplifier U1 through the resistor R4.
[0017] In one exemplary embodiment of this disclosure, the washing and dosing control system further includes: a bias module;
[0018] The bias module is connected to the output of the subtraction module and the input of the solenoid valve control module, respectively.
[0019] In one exemplary embodiment of this disclosure, the bias module includes: a pull-up resistor R7 and a pull-down resistor R8;
[0020] The first end of the pull-up resistor R7 is connected to the power supply, and the second end of the pull-up resistor R7 is grounded through the resistor R8.
[0021] In one exemplary embodiment of this disclosure, the subtraction module includes: resistor R5, resistor R6, transistor Q1, transistor Q2, and transistor Q3;
[0022] The first end of the resistor R5 is connected to the collector of the transistor Q2 through the resistor R6, and the second end of the resistor R5 is connected to the base of the transistor Q1.
[0023] The collector of transistor Q1 is connected to the base of transistor Q2, and the emitter of transistor Q1 is grounded; the emitter of transistor Q2 is connected to the base of transistor Q3.
[0024] The collector of transistor Q3 is connected to the collector of transistor Q2, the emitter of transistor Q3 is connected to the first terminal of the solenoid valve, and the second terminal of the solenoid valve is grounded.
[0025] In one exemplary embodiment of this disclosure, the washing and dosing control system further includes: a first switch and an alarm module;
[0026] The control terminal of the first switch is connected to the central control module; the first terminal of the first switch is connected to the output terminal of the subtraction module; and the second terminal of the first switch is connected to the alarm module.
[0027] In one exemplary embodiment of this disclosure, the washing and dosing control system further includes: an emergency braking module;
[0028] The emergency braking module is connected to the second terminal of the first switch and the control terminal of the solenoid valve, respectively.
[0029] In one exemplary embodiment of this disclosure, the washing and dosing control system further includes: a storage module;
[0030] The storage module is connected to the central control module.
[0031] The beneficial effects of the washing and dosing control system provided in this embodiment are as follows:
[0032] This disclosure introduces a subtraction module that can compare and calculate the preset flow rate value of the central control module with the actual flow rate value detected by the flow detection module in real time, ensuring flow control and avoiding the flow overflow problem caused by excessive instantaneous flow in traditional methods. When it is necessary to stop adding chemicals, the solenoid valve is not simply closed immediately, but the flow rate is gradually reduced to achieve a smooth decrease. This effectively reduces sudden changes in flow rate and further improves the accuracy of flow control. It lowers production costs, and precise chemical flow control helps ensure uniform distribution and full action of chemicals during the washing process, thereby improving washing quality and enhancing the accuracy of chemical addition control. Attached Figure Description
[0033] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0034] Figure 1 This is a schematic diagram of the structure of a washing and dosing control system provided in an embodiment of this disclosure;
[0035] Figure 2 This is a schematic diagram of the structure of the second washing and dosing control system provided in the embodiments of this disclosure;
[0036] Figure 3 This is a schematic diagram of the structure of the third washing and dosing control system provided in the embodiments of this disclosure. Detailed Implementation
[0037] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.
[0038] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.
[0039] The implementation of this disclosure will be described in detail below with reference to the specific accompanying drawings:
[0040] Figure 1 This is a schematic diagram of a washing and chemical dosing control system provided in an embodiment of this disclosure. (Refer to...) Figure 1 The washing and dosing control system includes: a central control module 10, a subtraction module 11, a flow detection module 12, a solenoid valve control module 13, and a solenoid valve 14;
[0041] The central control module 10 is connected to the non-inverting input terminal of the subtraction module 11 and the control terminal of the solenoid valve 14, respectively.
[0042] The central control module 10 is used to connect to the washing and sorting equipment;
[0043] The inverting input terminal of the subtraction module 11 is connected to the output terminal of the flow detection module 12, and the output terminal of the subtraction module 11 is connected to the input terminal of the solenoid valve control module 13.
[0044] The output terminal of the solenoid valve control module 13 is connected to the control terminal of the solenoid valve 14;
[0045] The flow detection module 12 is connected to the solenoid valve 14.
[0046] In this embodiment, considering the inaccuracy of existing chemical dosing flow control, which typically stops immediately after reaching a preset flow rate, and the large instantaneous flow rate means that even rapid valve closure can lead to flow overflow, a subtraction module 11 is provided. The central control module 10 can detect parameters or related parameters of the washing agent in the washing equipment and output the current amount of washing agent to be added according to a preset program. In other words, the central control module 10 can output the dosing flow rate value according to the actual situation. When the central control module 10 detects that chemical dosing is needed, it controls the solenoid valve 14 to open. The flow detection module 12 detects the flow rate of the solenoid valve 14. The subtraction module 11 subtracts the flow rate signal sent by the central control module 10 from the flow rate detected by the flow detection module 12. Essentially, this is a voltage signal. The larger the flow rate value detected by the flow detection module 12, the smaller the difference, and the smaller the voltage signal output by the subtraction module 11. The solenoid valve control module 13 then controls the opening of the solenoid valve 14 to be smaller until it is completely closed.
[0047] The flow detection module 12 may include devices such as an electromagnetic flow meter and a digital-to-analog converter. This is because the signal output by the electromagnetic flow meter may be a digital signal, while the subtraction module 11 essentially processes a voltage analog signal, so a digital-to-analog converter is needed to unify the signal.
[0048] As can be seen from the above, this disclosure, by introducing the subtraction module 11, can compare and calculate in real time the flow rate value preset by the central control module 10 and the flow rate value actually detected by the flow detection module 12, ensuring flow control and avoiding the flow overflow problem caused by excessive instantaneous flow in traditional methods. When it is necessary to stop adding chemicals, the solenoid valve 14 is not simply closed immediately, but the flow rate is gradually reduced by gradually decreasing the opening of the solenoid valve 14. This effectively reduces sudden changes in flow rate and further improves the accuracy of flow control. It reduces production costs, and precise chemical flow control helps ensure the uniform distribution and full action of chemicals during the washing process, thereby improving washing quality and enhancing the accuracy of chemical addition control in the washing process.
[0049] Figure 2 This is a schematic diagram of the structure of the second type of washing and chemical dosing control system provided in this embodiment. (Reference) Figure 2 In one embodiment of this disclosure, the subtraction module 11 includes: resistors R1, R2, R3, and R4, and operational amplifier U1;
[0050] The output of the flow detection module 12 is connected to the inverting input of the operational amplifier U1 through a resistor R1;
[0051] The central control module 10 is connected to the non-inverting input of the operational amplifier U1 via resistor R2;
[0052] The non-inverting input of operational amplifier U1 is grounded through resistor R3, and the output of operational amplifier U1 is connected to the inverting input of operational amplifier U1 through resistor R4.
[0053] In one embodiment of this disclosure, the washing and dosing control system further includes: a bias module 15;
[0054] The bias module 15 is connected to the output of the subtraction module 11 and the input of the solenoid valve control module 13, respectively.
[0055] In one embodiment of this disclosure, the bias module 15 includes: a pull-up resistor R7 and a pull-down resistor R8;
[0056] The first end of the pull-up resistor R7 is connected to the power supply, and the second end of the pull-up resistor R7 is grounded through resistor R8.
[0057] In one embodiment of this disclosure, the subtraction module 11 includes: resistor R5, resistor R6, transistor Q1, transistor Q2, and transistor Q3;
[0058] The first end of resistor R5 is connected to the collector of transistor Q2 through resistor R6, and the second end of resistor R5 is connected to the base of transistor Q1.
[0059] The collector of transistor Q1 is connected to the base of transistor Q2, and the emitter of transistor Q1 is grounded; the emitter of transistor Q2 is connected to the base of transistor Q3.
[0060] The collector of transistor Q3 is connected to the collector of transistor Q2, and the emitter of transistor Q3 is connected to the first terminal of solenoid valve 14. The second terminal of solenoid valve 14 is grounded.
[0061] In one embodiment of this disclosure, the solenoid valve control module 13 includes: resistor R5, resistor R6, transistor Q1, transistor Q2, and transistor Q3;
[0062] The first end of resistor R5 is connected to the collector of transistor Q2 through resistor R6, and the second end of resistor R5 is connected to the base of transistor Q1.
[0063] The collector of transistor Q1 is connected to the base of transistor Q2, and the emitter of transistor Q1 is grounded; the emitter of transistor Q2 is connected to the base of transistor Q3.
[0064] The collector of transistor Q3 is connected to the collector of transistor Q2, and the emitter of transistor Q3 is connected to the first terminal of solenoid valve 14. The second terminal of solenoid valve 14 is grounded.
[0065] In this embodiment, the subtraction module 11 can be a subtractor circuit, and the voltage at the output terminal of the operational amplifier U1 is the difference between the voltage signal input to the non-inverting input terminal of the operational amplifier U1 and the voltage signal input to the inverting input terminal of the operational amplifier U1.
[0066] Simultaneously, considering that as the flow rate output by solenoid valve 14 increases, the difference between the accumulated flow rate and the flow rate set by the central control module 10 becomes smaller, meaning the voltage signal at the output of operational amplifier U1 in subtraction module 11 will gradually decrease, potentially failing to drive solenoid valve 14, three transistors (Q1, Q2, and Q3) are used to increase the voltage and drive solenoid valve 14. As the voltage decreases, i.e., as the flow rate approaches the preset value, the opening of solenoid valve 14 decreases until transistor Q1 is cut off. However, considering that the base cutoff of transistor Q1 is not 0V, but approximately 0.7V, meaning that before reaching the preset flow rate, there is no driving current in solenoid valve 14 to maintain its opening, the valve closes, and there is still some error. Therefore, bias module 15 is provided. The pull-up resistor R7 and pull-down resistor R8 aim to provide a certain bias voltage to minimize the flow error caused by the characteristics of the transistors themselves. For example, the voltage can be 0.6V or other voltages, and the bias voltage can be adjusted by adjusting the resistance value of resistor R7 or resistor R8 or the power supply voltage.
[0067] Secondly, transistors Q1, Q2, and Q3 are NPN, PNP, and NPN, respectively. This arrangement is intended to prevent the high turn-on voltage of transistor Q1 caused by connecting all NPN transistors together, which might require 2.1V to turn on Q1. This would necessitate a larger bias voltage, which could lead to inaccurate flow output. Therefore, this embodiment uses different transistor types to solve the problem of high turn-on voltage and minimize voltage drop to drive solenoid valve 14.
[0068] As can be seen from the above, this disclosure, through the amplification effect of the three transistors Q1, Q2, and Q3, ensures sufficient current to drive the solenoid valve 14 even when the output voltage of the operational amplifier U1 decreases, thus solving the problem of insufficient drive of the solenoid valve 14 due to voltage reduction. In this embodiment, the bias module 15, composed of pull-up resistors R7 and R8, provides a certain bias voltage to transistor Q1, helping to reduce flow errors caused by the transistor's cutoff voltage characteristics and ensuring that the solenoid valve 14 maintains a stable opening even when approaching the preset flow value, until it is precisely closed. By selecting different types of transistors (NPN, PNP, NPN), the problem of high on-state voltage is solved, and the voltage drop is minimized, thereby improving the driving efficiency of the solenoid valve 14 and the accuracy of flow control, and ultimately enhancing the accuracy of the washing and dosing control.
[0069] Figure 3 This is a schematic diagram of the third type of washing and dosing control system provided in the embodiments of this disclosure, with reference to... Figure 3 In one embodiment of this disclosure, the washing and dosing control system further includes: a first switch 16 and an alarm module 17;
[0070] The control terminal of the first switch 16 is connected to the central control module 10; the first terminal of the first switch 16 is connected to the output terminal of the subtraction module 11; and the second terminal of the first switch 16 is connected to the alarm module 17.
[0071] In one embodiment of this disclosure, the washing and dosing control system further includes: an emergency braking module 18;
[0072] The emergency braking module 18 is connected to the second terminal of the first switch 16 and the control terminal of the solenoid valve 14.
[0073] In one embodiment of this disclosure, the washing and dosing control system further includes: a storage module 19;
[0074] Storage module 19 is connected to central control module 10.
[0075] In this embodiment, considering that in actual application, the solenoid valve 14 may not be fully closed due to various reasons, such as an increase in bias voltage or a change in the resistance value of the pull-up resistor R7 or the pull-down resistor R8, which may result in the preset flow value being reached but still not closed, the central control module 10 will also control the first switch 16 to close when it detects that the medicine needs to be added. At this time, the alarm module 17 is connected to the output terminal of the subtraction module 11. The alarm module 17 is configured to alarm when it receives a negative voltage, which means that the output flow value of the solenoid valve 14 is greater than the preset flow value. The alarm module 17 can be equipped with a buzzer and an LED. When the flow value of the medicine is greater than the preset flow value, an audible and visual alarm will be triggered.
[0076] Similarly, when relevant personnel notice the alarm module 17 triggering an alarm, the emergency braking module 18 can control the solenoid valve 14 to close, preventing a deterioration in the washing effect and waste of washing agents. The storage module 19 can store the set flow rate value sent by the central control module 10 to provide data support for subsequent inspections.
[0077] As can be seen from the above, this disclosure, through the control of the first switch 16, can quickly trigger the alarm module 17 when the central control module 10 detects an abnormal flow of reagent (such as exceeding a preset value). The alarm module 17 adopts an audible and visual alarm method, which can immediately attract the attention of the operator, thereby enabling timely measures to be taken, improving the safety and reliability of the system, avoiding the problem of poor washing effect and reagent waste caused by the solenoid valve 14 not being fully closed, and thus improving the accuracy of washing and dosing control.
[0078] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.
Claims
1. A washing and dosing control system, characterized in that, include: Central control module, subtraction module, flow detection module, solenoid valve control module, and solenoid valve; The central control module is connected to the in-phase input terminal of the subtraction module and the control terminal of the solenoid valve, respectively. The central control module is used to connect to the washing and sorting equipment; The inverting input terminal of the subtraction module is connected to the output terminal of the flow detection module, and the output terminal of the subtraction module is connected to the input terminal of the solenoid valve control module. The output terminal of the solenoid valve control module is connected to the control terminal of the solenoid valve. The flow detection module is connected to the solenoid valve.
2. The washing and dosing control system as described in claim 1, characterized in that, The subtraction module includes: resistors R1, R2, R3, and R4, and operational amplifier U1; The output of the flow detection module is connected to the inverting input of the operational amplifier U1 through the resistor R1; The central control module is connected to the non-inverting input terminal of the operational amplifier U1 through the resistor R2; The non-inverting input terminal of the operational amplifier U1 is grounded through the resistor R3, and the output terminal of the operational amplifier U1 is connected to the inverting input terminal of the operational amplifier U1 through the resistor R4.
3. The washing and dosing control system as described in claim 1, characterized in that, Also includes: Bias module; The bias module is connected to the output of the subtraction module and the input of the solenoid valve control module, respectively.
4. The washing and dosing control system as described in claim 3, characterized in that, The bias module includes: a pull-up resistor R7 and a pull-down resistor R8; The first end of the pull-up resistor R7 is connected to the power supply, and the second end of the pull-up resistor R7 is grounded through the resistor R8.
5. The washing and dosing control system as described in claim 1, characterized in that, The solenoid valve control module includes: resistor R5, resistor R6, transistor Q1, transistor Q2, and transistor Q3; The first end of the resistor R5 is connected to the collector of the transistor Q2 through the resistor R6, and the second end of the resistor R5 is connected to the base of the transistor Q1. The collector of transistor Q1 is connected to the base of transistor Q2, and the emitter of transistor Q1 is grounded; the emitter of transistor Q2 is connected to the base of transistor Q3. The collector of transistor Q3 is connected to the collector of transistor Q2, the emitter of transistor Q3 is connected to the first terminal of the solenoid valve, and the second terminal of the solenoid valve is grounded.
6. The washing and dosing control system as described in claim 1, characterized in that, Also includes: First switch and alarm module; The control terminal of the first switch is connected to the central control module; the first terminal of the first switch is connected to the output terminal of the subtraction module; and the second terminal of the first switch is connected to the alarm module.
7. The washing and dosing control system as described in claim 6, characterized in that, Also includes: Emergency braking module; The emergency braking module is connected to the second terminal of the first switch and the control terminal of the solenoid valve, respectively.
8. The washing and dosing control system as described in claim 1, characterized in that, Also includes: Storage module; The storage module is connected to the central control module.