Multi-pump parallel energy-saving control system

Abstract

The utility model relates to the technical field of multi-pump control, in particular to a multi-pump parallel energy-saving control system which comprises a conversion module, a touch screen, a temperature module, a temperature sensor, an RS485 module, a temperature liquid level transmitter, a frequency conversion control cabinet, a pressure transmitter, a first expansion module and a second expansion module. The touch screen, the temperature module and the pressure transmitter are in signal connection through the RS485 module, the touch screen is in signal connection with the frequency conversion control cabinet, the temperature sensor is in signal connection with the temperature module, the RS485 module is in signal connection with the temperature liquid level transmitter, and the first expansion module is used for sending out an automatic frequency modulation signal. The second extension module is used for obtaining the operation frequency and operation current of the water pump. The flow, the liquid level and the pressure are accurately monitored, the optimal operation state of the pump set is calculated and automatically adjusted, the service life of the water pump is effectively prolonged, and the fault shutdown frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of multi-pump control technology, and more specifically, to a multi-pump parallel energy-saving control system. Background Technology

[0002] In the field of fluid transportation in both industrial and civil applications, the energy consumption and operating efficiency of pump systems are always key considerations. Traditional fixed-frequency pumps have significant limitations in their operating modes, as they can only operate at the fixed industrial frequency and cannot flexibly adjust the frequency according to actual operating conditions such as water level. When the water level is low, fixed-frequency pumps still maintain high-power operation, resulting in a large amount of unnecessary energy loss, which increases operating costs and contradicts the current trend of energy conservation and emission reduction. Traditional multi-pump regulation systems also face difficulties, relying mainly on simple start-stop control of pumps based on liquid level, lacking fine-grained regulation capabilities. For example, when the system is in a delicate state where the power of one full-frequency pump is insufficient while the power of two full-frequency pumps exceeds the demand, such systems cannot accurately allocate the power of the pump sets, failing to achieve overall energy-saving effects. This results in energy waste and may also affect the service life of pumps, reduce system stability, or even affect the overall project progress or production continuity under extreme conditions due to frequent start-stop or overload.

[0003] The utility model patent with announcement number CN209523863U discloses a multi-pump control system, including a frequency converter and a pump group connected to an AC power supply for condition judgment and PID adjustment. The frequency converter is connected to a pressure acquisition unit. Each pump in the pump group is provided with a contactor between itself and the AC power supply, and between itself and the frequency converter. Each contactor is connected to the frequency converter for signal.

[0004] Although this utility model system is highly efficient, extends the pump's lifespan, saves on components, and reduces costs, traditional fixed-frequency pumps consume constant power during industrial frequency operation, resulting in significant energy waste when the water level is low. Utility Model Content

[0005] The purpose of this invention is to provide a multi-pump parallel energy-saving control system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-pump parallel energy-saving control system includes a conversion module, a touch screen, a temperature module, a temperature sensor, an RS485 module, a temperature and level transmitter, a frequency converter control cabinet, a pressure transmitter, a first expansion module, and a second expansion module. The conversion module converts 220V AC mains power into DC power. The touch screen, the temperature module, and the pressure transmitter are connected via the RS485 module. The touch screen and the frequency converter control cabinet are also connected. The temperature sensor and the temperature module are connected. The RS485 module and the temperature and level transmitter are connected. The first expansion module sends an automatic frequency modulation signal, and the second expansion module acquires the operating frequency and operating current of the pumps.

[0008] Preferably, the 220V AC mains power and the conversion module are used together for power supply. The conversion module outputs 24V DC power, and the output terminal of the conversion module is also equipped with a switch GF1.

[0009] Preferably, the frequency converter control cabinet is a Siemens S7-200 SMART model. The frequency converter control cabinet receives temperature data, liquid level data and temperature data through an RS485 port, and outputs operating commands through its output port.

[0010] Preferably, both the first expansion module and the second expansion module are connected to the frequency converter control cabinet via signal connection.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model calculates and automatically adjusts the optimal operating state of the pump set by precisely monitoring the flow rate, liquid level, and pressure. When the water level is low, the pump frequency is reduced, significantly reducing power consumption and improving energy utilization efficiency. It also precisely allocates the pump set units and intelligently adjusts the frequency and parameters according to the working conditions to avoid overload or underload caused by power imbalance, ensuring stable output of flow rate and head, effectively extending the service life of the pump, reducing the number of downtime due to failure, enhancing the overall reliability and durability of the system, ensuring continuous and uninterrupted production processes, and reducing maintenance costs and manpower input. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 The circuit diagram is for a utility model medium frequency converter control cabinet;

[0015] Figure 3 This is a circuit diagram of the first expansion module and the second expansion module in the utility model;

[0016] In the picture:

[0017] 1. Conversion module;

[0018] 2. Touchscreen;

[0019] 3. Temperature module;

[0020] 4. Temperature sensor;

[0021] 5. RS485 module;

[0022] 6. Temperature and level transmitter;

[0023] 7. Variable frequency control cabinet;

[0024] 8. Pressure transmitter;

[0025] 9. First extension module;

[0026] 10. Second extension module. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Please see Figures 1-3 The present invention provides the following technical solution:

[0029] A multi-pump parallel energy-saving control system includes a conversion module 1, a touch screen 2, a temperature module 3, a temperature sensor 4, an RS485 module 5, a temperature and level transmitter 6, a frequency converter control cabinet 7, a pressure transmitter 8, a first expansion module 9, and a second expansion module 10. The conversion module 1 converts 220V AC mains power to DC power. The touch screen 2, temperature module 3, and pressure transmitter 8 are connected via RS485 module 5. The touch screen 2 is also connected to the frequency converter control cabinet 7. The temperature sensor 4 is connected to the temperature module 3, and the RS485 module 5 is connected to the temperature and level transmitter 6. The first expansion module 9 sends an automatic frequency modulation signal, and the second expansion module 10 acquires the pump's operating frequency and current. The temperature sensor 4 is installed at key points on the pump. The system predicts equipment health and triggers warnings, adjusts water pumps, or activates cooling when temperatures exceed limits, preventing overheating damage and extending equipment lifespan. RS485 module 5 serves as the data transmission hub, building a high-speed, stable bus network using the RS485 standard protocol. It transmits and receives temperature, level, pressure, and control commands in real time, offering strong anti-interference capabilities, long transmission distances, and multi-node support to ensure accurate system communication. Temperature and level transmitter 6 employs high-precision sensing elements to accurately measure liquid level and monitor water temperature. Level data helps the system start and stop water pumps as needed, prevents cavitation overload, and supplements the monitoring system with water temperature information, improving operational condition perception accuracy and optimizing control strategies. Pressure transmitter 8 is installed at critical pipeline nodes to monitor water pressure changes in real time, providing feedback to help the system accurately adjust pressure, maintain stable output, prevent pressure fluctuations from causing malfunctions, ensure smooth and safe fluid transport, and improve system reliability.

[0030] In this embodiment, the 220V AC mains power and the conversion module 1 are used together for power supply. The conversion module 1 outputs 24V DC power after step-down, rectification, filtering and voltage regulation. The output terminal of the conversion module 1 is also equipped with a switch GF1. The 220V AC mains power is mainly used to power the frequency converter control cabinet 7 and the corresponding water pump and frequency converter. The 24V DC power output by the conversion module 1 can power the other devices.

[0031] Specifically, the variable frequency control cabinet 7 is a Siemens S7-200 SMART. The variable frequency control cabinet 7 receives temperature data, liquid level data and temperature data through the RS485 port. The output port of the variable frequency control cabinet 7 outputs operating commands, which are mainly implemented through relays. The extra ports can be connected to more water pumps. The operating commands include start commands and stop commands, and a buzzer can also be connected to alarm when a problem occurs.

[0032] Furthermore, both the first expansion module 9 and the second expansion module 10 are connected to the frequency converter control cabinet 7 via signal. The frequency modulation signal is implemented through the frequency converter, and the operating current and operating frequency are obtained through corresponding sensors. The first expansion module 9 sends the frequency modulation signal according to the system logic to drive the frequency converter to accurately adjust the water pump frequency. The second expansion module 10 collects the water pump parameters to provide the system with the basis for operating status. The two work together to realize closed-loop control of the pump group and optimize performance.

[0033] In use, the multi-pump parallel energy-saving control system of this utility model operates with each hardware module working collaboratively to form an intelligent closed-loop control link. After the conversion module 1 starts supplying power, field signals such as temperature, liquid level, and pressure are collected and converted by corresponding sensors and transmitters, and then aggregated to the touch screen for centralized display, analysis, and processing via the RS485 module 5. The signals are then transmitted to the frequency converter control cabinet 7 via RS485 to read all signal values ​​and achieve interlocking. The frequency converter control cabinet 7, relying on its built-in intelligent algorithm, combines real-time data with preset operating condition thresholds for precise comparison and calculation, and accurately issues control commands to each pump. The first expansion module 9 and the second expansion module 10 provide feedback verification, enabling the pump group to dynamically adapt to complex operating conditions, achieving high efficiency, energy saving, and stable operation, and realizing unattended automated operation. For example, when the liquid level is below 5m, all pumps stop; when the liquid level is above 10m, all pumps run at full frequency; when the temperature of a certain phase of the motor exceeds 130 degrees, that pump is shut down for protection, etc.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-pump parallel energy-saving control system, comprising a conversion module (1), a touch screen (2), a temperature module (3), a temperature sensor (4), an RS485 module (5), a temperature and level transmitter (6), a frequency converter control cabinet (7), a pressure transmitter (8), a first expansion module (9), and a second expansion module (10), characterized in that: The conversion module (1) is used to convert 220V AC mains power into DC power. The touch screen (2), the temperature module (3) and the pressure transmitter (8) are connected by the RS485 module (5). The touch screen (2) is connected by the frequency converter control cabinet (7). The temperature sensor (4) is connected by the temperature module (3). The RS485 module (5) is connected by the temperature level transmitter (6). The first expansion module (9) is used to send an automatic frequency modulation signal. The second expansion module (10) is used to obtain the operating frequency and operating current of the water pump.

2. The multi-pump parallel energy-saving control system according to claim 1, characterized in that: The 220V AC mains power and the conversion module (1) are used together for power supply. The conversion module (1) outputs 24V DC power. The output terminal of the conversion module (1) is also equipped with a switch GF1.

3. The multi-pump parallel energy-saving control system according to claim 1, characterized in that: The variable frequency control cabinet (7) is a Siemens S7-200 SMART. The variable frequency control cabinet (7) receives temperature data, liquid level data and temperature data through the RS485 port. The output port of the variable frequency control cabinet (7) outputs running commands.

4. The multi-pump parallel energy-saving control system according to claim 1, characterized in that: Both the first expansion module (9) and the second expansion module (10) are connected to the frequency converter control cabinet (7) via signal connection.

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