Automatic start-stop protection system for booster pump
By combining sensing devices and a PLC controller, automatic start-stop protection for the booster pump is achieved, solving the problem of dry running without water, extending equipment life, and saving resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-03-13
AI Technical Summary
Existing booster pumps are prone to running dry when there is no water, which can lead to equipment damage and economic losses. Furthermore, disassembly is inconvenient, and unavoidable emergencies increase the workload.
The system uses a sensor to detect water flow signals and a PLC controller to control the circuit switch, ensuring that the booster pump is powered on when there is water flow and disconnected when there is no water flow, thus preventing it from running dry.
It effectively prevents the booster pump from running dry, extends equipment life, saves manpower and resources, and reduces equipment damage and maintenance costs.
Smart Images
Figure CN223991841U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an automatic start-stop protection system for a booster pump, which belongs to the protection circuit of an agricultural irrigation system. Background Technology
[0002] During the dry season, water pumps are typically used to draw water from wells, rivers, or other sources to supply sprinkler irrigation systems. Because sprinkler irrigation systems have long hoses and the spray nozzles require sufficient water pressure to project water far, booster pumps are needed to further pressurize the system and meet the spray nozzles' pressure requirements. Booster pumps are highly susceptible to damage from running dry. Dry running will damage the water seal, and replacing the water seal not only results in direct economic losses but also poses a risk of leakage during the disassembly of the old booster pump. Furthermore, booster pumps are heavy, difficult to disassemble, and labor-intensive. Water shortages are difficult to avoid; sudden pump failure, power outages, or burst hoses can all lead to water shortages. Moreover, these situations are hard to completely prevent. Therefore, preventing booster pumps from running dry is a crucial and important task. Utility Model Content
[0003] The purpose of this invention is to provide an automatic start-stop protection system for booster pumps to solve the problem of booster pumps easily running dry in the prior art.
[0004] To solve the above problems, the automatic start-stop protection system for booster pumps involved in this utility model adopts the following technical solution: An automatic start-stop protection system for booster pumps includes a booster pump. A sensing device for detecting water flow is connected in series on the water pipe connected to the inlet of the booster pump. The sensing device is transmitted to a controller in real time to transmit the detected water flow signal to the controller. The controller is connected to the circuit switch of the booster pump. When a water flow signal is received, the control circuit switch is turned on; when no water flow signal is received, the control circuit switch is turned off.
[0005] The controller is a PLC controller. After receiving a stable water flow signal, the controller turns on the circuit switch of the booster pump.
[0006] The circuit switch is a smart air switch or a contactor switch.
[0007] The sensing device is a pressure sensor or a water flow sensor.
[0008] The controller is powered by a low-voltage circuit obtained by transforming the power supply of the booster pump through a transformer.
[0009] The transformer, controller, and circuit switch are all located inside the electrical control box.
[0010] This invention detects water flow by means of a water flow signal and controls the circuit switch of the booster pump through a controller. When a water flow signal is received, the control circuit switch is turned on, and when no water flow signal is received, the control circuit switch is turned off, preventing the booster pump from running dry, extending the life of the booster pump, and saving manpower and resources. Attached Figure Description
[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below:
[0012] Figure 1 This is a control principle diagram of an embodiment of the present invention. Detailed Implementation
[0013] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model; that is, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0014] Specific embodiments of the automatic start-stop protection system for booster pumps involved in this utility model are described below. Figure 1 In this system, a water pipe is connected to the inlet of the booster pump 1, and a sensing device 3, which is a pressure sensor, is connected to the PLC controller 6. The pressure sensor transmits the detected pressure signal to the PLC controller 6. Upon receiving the signal, the PLC controller 6 turns on the circuit switch 5 of the booster pump 1, and the booster pump 1 starts working. When the PLC controller 6 does not receive a signal, it turns off the circuit switch 5 of the booster pump 1, thereby preventing the booster pump 1 from running dry.
[0015] When circuit switch 5 is a contactor switch, the PLC controls the power supply to booster pump 1 via the contactor switch based on the water flow signal. If there is a water flow signal, it means there is water flow, and booster pump 1 turns on. If there is no water flow signal, it means there is no water flow, and booster pump 1 turns off. The PLC controls the contactor switch of booster pump 1 with a delay when it senses a water flow signal. It controls the contactor switch of booster pump 1 after the received water flow signal stabilizes. This is to prevent the contactor switch of booster pump 1 from being constantly opening and closing in a short period of time if there is air in the water pipe when the water flow first arrives at booster pump 1, which would cause the water flow signal to be intermittent. If the contactor switch of booster pump 1 is controlled by the signal at this time, it will cause the contactor switch to be closed and opened continuously in a short period of time, which would damage booster pump 1. After the delay, the water flow is stable, there is no air, and the water pressure signal is stable. Then, the contactor switch of booster pump 1 is closed based on the water pressure signal. The principle of PLC controlling contactor switch is that the PLC provides a 5V voltage to the contactor's coil to control the contactor's closing. The coil controls the opening and closing of the contactor's 380V contacts.
[0016] In this embodiment, the controller is powered by a low-voltage circuit, which is the result of the power supply from the booster pump 1 being transformed by the transformer 7. The low-voltage circuit here is 24V.
[0017] The power supply for booster pump 1 is 380 volts.
[0018] The functions of the PLC controller are implemented through programming as needed, and will not be described in detail here.
[0019] The controller in this embodiment is a PLC controller, but other types of controllers can be selected in other embodiments.
[0020] In this embodiment, the transformer, controller, and circuit switch are all installed inside the electrical control box 8, ensuring electrical safety.
[0021] In this embodiment, the pressure signal is stabilized by delay. In other embodiments, the stability of the water flow signal can be determined by establishing a water flow signal analysis model.
[0022] In this embodiment, the circuit switch is a contactor switch. In other embodiments, the circuit switch can also be an air switch. Water pressure sensing devices or water flow sensing devices can detect the presence of water flow. In different embodiments, other sensing devices that can detect the presence of water flow, such as pressure sensors or water flow sensors, can be selected by those skilled in the art as needed.
[0023] In practical use, an additional pump supplies water to the sprinkler machine 2, and the booster pump 1 is supplied with water by the water pump 4, such as... Figure 1 As shown.
[0024] Finally, it should be noted that the above embodiments are only for illustration and not for limiting the technical solutions of this utility model. Any equivalent substitutions and modifications or partial substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of protection of the claims of this utility model.
Claims
1. A supercharger pump automatic start-stop protection system comprising a supercharger pump, characterized by, The water pipe connected with the water inlet of the booster pump is provided with an inductive device for detecting water flow, the inductive device is connected with a controller for transmitting the detected water flow signal to the controller in real time, the controller is connected with the circuit switch control of the booster pump, the circuit switch is controlled to be turned on when the water flow signal is received and the circuit switch is controlled to be turned off when no water flow signal is received, the controller is a PLC controller, and the circuit switch of the booster pump is turned on after the stable water flow signal is received by the controller.
2. The booster pump auto start-stop protection system of claim 1, wherein, The circuit switch is an intelligent air switch or a contactor switch.
3. The booster pump auto start-stop protection system of claim 2, wherein, The inductive device is a pressure sensor or a water flow sensor.
4. The booster pump auto start-stop protection system of claim 3, wherein, The power supply of the controller is weak current after the power supply of the booster pump is transformed by a transformer.
5. The booster pump auto start-stop protection system of claim 4, wherein, The transformer, the controller and the circuit switch are arranged in an electric control box.