Simulation platform of PID constant liquid level automatic adjusting system

Abstract

The utility model relates to the technical field of water system equipment application, in particular to a PID constant liquid level automatic adjusting system simulation platform which comprises a first water storage tank (1), the bottom of the first water storage tank (1) is connected with a second water storage tank (2), a six-branch water feeding pipe (7) is connected between the first water storage tank (1) and the second water storage tank (2), and an alternating current water pump (9) is arranged on the six-branch water feeding pipe (7). And the alternating-current water pump (9) is connected to a control cabinet (10). According to the platform, the three parameters P, I and D are accurately calculated by manufacturing the simulation platform, so that the system can accurately operate according to the manually set pressure, the impact of the rotating speed oscillation of the water pump on the electric power system is avoided, the strong function and strong anti-interference performance of the system operation are ensured, various working states of the site are really simulated, and the working efficiency is improved. And meanwhile, simulation training of operators and maintenance of field fault equipment on the simulation platform can be realized, so that the overall application efficiency of the water system equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water system equipment application, in particular to a PID constant liquid level automatic adjustment system simulation platform. Background Art

[0002] PID constant liquid level automatic adjustment system plays a vital role in water system production. It is mainly characterized by the combination of strong and weak, soft and hard, and it often involves electrical control technology, power transformation and distribution, instrumentation and other fields in sewage treatment and water supply systems. However, in the actual training process, many experiments are usually limited by software and hardware, so that the actual operation process of sewage treatment and water supply systems cannot be intuitively and accurately fed back to the operators, which often leads to low maintenance efficiency and operation safety of water system equipment. Utility Model Content

[0003] The utility model provides a PID constant liquid level automatic adjustment system simulation platform to solve the problems existing in the above background.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A PID constant liquid level automatic adjustment system simulation platform comprises a first water storage tank, the bottom of the first water storage tank is connected to a second water storage tank, a six-point water supply pipe is connected between the first water storage tank and the second water storage tank, an AC water pump is arranged on the six-point water supply pipe, and the AC water pump is connected to a control cabinet.

[0006] Furthermore, the bottom of the first water storage tank is connected to a four-branch water pipe, the four-branch water pipe is connected to the top of the second water storage tank, and a DC solenoid valve is also provided on the four-branch water pipe.

[0007] Furthermore, the control cabinet is provided with an air switch control panel, a PLC controller, a display, and an indicator light, and the PLC controller is connected to the AC water pump and the DC solenoid valve.

[0008] Furthermore, a top cover is provided on the top of the first water storage tank, and a liquid level meter installation hole is opened on the top cover.

[0009] Furthermore, one end of the six-point water supply pipe extending into the inner side of the first water storage tank is connected to a splash-proof lower elbow.

[0010] The utility model has the following beneficial effects:

[0011] The utility model provides a PID constant liquid level automatic adjustment system simulation platform, which is mainly composed of a water storage tank, a water pipe, a solenoid valve, a water pump and a controller. By making a simulation platform, the three parameters of P, I and D are accurately calculated, so that the system can not only accurately operate according to the manually set pressure, but also avoid the impact on the power system due to the rotation speed oscillation of the water pump, thereby ensuring the strong function and strong anti-interference of the system operation, ensuring the real simulation of various working conditions on site, and can be used for simulation training of operating personnel and maintenance of on-site fault equipment on the simulation platform, thereby improving the overall application efficiency of water system equipment, and solving the problem that in the current process of controlling the liquid level of the water system, the working and fault conditions of the water system are usually difficult to intuitively feedback due to the lack of special, efficient and accurate experimental equipment, and the precise maintenance of the operating personnel cannot be better ensured, which ultimately causes the overall production efficiency and safety of the water system to be poor.

[0012] The utility model PID constant liquid level automatic adjustment system simulation platform is convenient for handling various electrical faults, communication faults and instrument faults in the water system. It can quickly analyze equipment failures, compile various communication parameters and communication templates, and effectively improve the efficiency of on-site maintenance work; it can intuitively display the working principles of the electrical control and communication systems in the water system, providing convenient conditions for training and learning.

[0013] Based on the traditional water pump system, the utility model PID constant liquid level automatic adjustment system simulation platform upgrades the electrical control system, sets the appropriate liquid level parameters in the PLC, and starts the PID program, which can automatically control the frequency of the inverter, and then accurately adjust the speed of the water pump and the separation and closing of the solenoid valve, so as to realize the precise control of the liquid level. This control mode is widely used in water treatment systems such as sewage stations. Its characteristics are that it not only improves work efficiency but also reduces the difficulty of operation.

[0014] The utility model can accurately maintain the liquid level height. By setting reasonable liquid level parameters, the system can automatically adjust the speed of the water pump according to real-time liquid level information to keep the liquid level within the set range. When the water level exceeds or falls below the set range, the system will promptly adjust the speed of the water pump to restore it to the set liquid level height. This automatic adjustment function effectively simplifies the operating process in on-site applications and improves stability and operational accuracy.

[0015] The PID program of the utility model is responsible for calculating the frequency required to adjust the speed of the water pump so that the actual liquid level is consistent with the set value. The PID program runs inside the PLC, calculates the adjustment frequency by reading the liquid level information obtained by the sensor and sends it to the frequency converter, thereby realizing precise control of the speed of the water pump.

[0016] The AC water pump of the utility model is an actuator responsible for transporting water from a water source to where it is needed. Through the PID regulation system, the rotation speed of the AC water pump can be dynamically adjusted according to the actual liquid level to maintain the stability of the liquid level. This can save energy, extend the service life of the water pump, and improve the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] The meanings of the reference numerals are as follows:

[0019] 1. The first water storage tank; 2. The second water storage tank; 3. The four-way downpipe; 4. The DC solenoid valve; 5. The top cover; 6. The installation hole of the liquid level gauge; 7. The six-way uppipe; 8. The anti-splash lower elbow; 9. The AC water pump; 10. The control cabinet; 11. The circuit breaker control panel; 12. The PLC controller; 13. The display; 14. The indicator light. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, a PID constant liquid level automatic adjustment system simulation platform includes a first water storage tank 1, a second water storage tank 2 is connected to the bottom of the first water storage tank 1, a six-point water supply pipe 7 is connected between the first water storage tank 1 and the second water storage tank 2, an AC water pump 9 is provided on the six-point water supply pipe 7, and the AC water pump 9 is connected to a control cabinet 10.

[0022] The bottom of the first water storage tank 1 is connected with a four-branch water down pipe 3 , and the four-branch water down pipe 3 is connected with the top of the second water storage tank 2 . A DC solenoid valve 4 is also provided on the four-branch water down pipe 3 .

[0023] The control cabinet 10 is provided with an air switch control panel 11 , a PLC controller 12 , a display 13 , and an indicator light 14 , and the PLC controller 12 is connected to the AC water pump 9 and the DC solenoid valve 4 .

[0024] A top cover 5 is provided on the top of the first water storage tank 1 , and a liquid level meter mounting hole 6 is provided on the top cover 5 .

[0025] One end of the six-point water supply pipe 7 extending into the inner side of the first water storage tank 1 is connected with a splash-proof lower elbow 8.

[0026] When the utility model is applied in practice, the whole system is divided into a manual part and an automatic part. The manual part has two frequency setting modes. When the button switch is turned to the lower side, the frequency can be directly given by rotating the frequency converter knob. When the button switch is turned to the upper side, the frequency can be set on the circuit breaker control panel 11 to adjust the speed of the AC water pump 9. When switching to the automatic mode, a target liquid level and three parameters of P, I, and D are set on the circuit breaker control panel 11. The PID program inside the PLC controller 12 calculates and outputs an analog value to the frequency converter to adjust the speed of the AC water pump 9 in real time. After running for a period of time, the liquid level of the first water storage tank 1 will stabilize at the set value.

[0027] Real-time monitoring of liquid level, using liquid level sensor or other liquid level detection equipment, real-time monitoring of current liquid level, and feedback of monitoring data to PLC controller 12; PLC controller 12 internal PID control algorithm according to the set target liquid level and real-time monitoring of liquid level data, calculate a controller output value, the output value is used to adjust the frequency of the frequency converter; through the control signal output by PLC controller 12, control the frequency of the frequency converter, thereby adjusting the speed of AC water pump 9, when the liquid level deviates from the target value, PID control algorithm will adjust the control signal accordingly to achieve stable regulation of liquid level; the system will continue to monitor the liquid level, perform PID calculation and control signal adjustment, so that the actual liquid level can be stably regulated near the target value. Through this PID control method, it can ensure that the speed and liquid level of AC water pump 9 maintain a certain correlation, and realize accurate control of the actual liquid level, which can improve the stability and accuracy of the system, while saving energy and resources, and through this platform, the power plant water system automation simulation display can be realized, so that the operators can intuitively understand the whole process of electrical automation of the water system, and can personally operate and simulate fault handling. Therefore, the simulation platform has good practicability.

Claims

1. A PID constant liquid level automatic adjustment system simulation platform, characterized by: The invention comprises a first water storage tank (1), the bottom of the first water storage tank (1) is connected to a second water storage tank (2), a six-point water supply pipe (7) is connected between the first water storage tank (1) and the second water storage tank (2), an AC water pump (9) is provided on the six-point water supply pipe (7), and the AC water pump (9) is connected to a control cabinet (10).

2. A PID constant liquid level automatic adjustment system simulation platform according to claim 1, characterized in that: The bottom of the first water storage tank (1) is connected to a four-branch water down pipe (3), the four-branch water down pipe (3) is connected to the top of the second water storage tank (2), and a DC solenoid valve (4) is also provided on the four-branch water down pipe (3).

3. A PID constant liquid level automatic adjustment system simulation platform according to claim 1, characterized in that: The control cabinet (10) is provided with a circuit breaker control panel (11), a PLC controller (12), a display (13), and an indicator light (14), respectively, and the PLC controller (12) is connected to the AC water pump (9) and the DC solenoid valve (4).

4. A PID constant liquid level automatic adjustment system simulation platform according to claim 2, characterized in that: A top cover (5) is provided on the top of the first water storage tank (1), and a liquid level meter mounting hole (6) is provided on the top cover (5).

5. The PID constant liquid level automatic adjustment system simulation platform according to claim 1 is characterized in that: One end of the six-point water supply pipe (7) extending into the inner side of the first water storage tank (1) is connected to a splash-proof lower elbow (8).

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