Pump station integrated monitoring system

Abstract

The utility model relates to a comprehensive monitoring system for a pump station. The comprehensive monitoring system comprises a rectifier transformer, a first power management module, a second power management module, a water pressure sensor, a first voltage comparator, a signal amplifier and an electric control switch module, a water pressure sensor is used for collecting water pressure of a community water supply pipe to output water pressure detection voltage; when the water pressure of the community water supply pipe is higher than the preset water pressure value, the water pressure detection voltage is higher than the first reference voltage, and the first voltage comparator outputs low-level voltage; when the electric control switch module is cut off, the pump station motor is powered off and stops working; when the water pressure of the community water supply pipe is lower than or equal to a preset water pressure value and the water pressure detection voltage is lower than first reference voltage, the first voltage comparator outputs high-level voltage; the electric control switch module is switched on, the pump station motor is powered on to start working, the water pressure of the community water supply pipe is improved under operation of the pump station motor, and therefore the working state of the pump station is automatically controlled according to the water pressure of community water supply, and energy waste of the pump station is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water pump control technology, specifically to a comprehensive monitoring system for pump stations. Background Technology

[0002] Pumping stations are mainly used for water supply and drainage, especially for community water supply. When used for community water supply, pumping stations mainly pressurize tap water to ensure that the water supply pressure in the community can reach the preset value. However, since tap water itself has a certain pressure in the tap water pipes, the water pressure in the tap water pipes will be low during peak water usage periods, resulting in insufficient water supply in the community.

[0003] In existing technologies, pumping stations are mainly set up in communities to supply tap water to meet the community's water supply needs. Although existing technologies use pumping stations to supply water to communities in real time, during off-peak water usage periods when the tap water pressure is sufficient for community users, the continuous supply of water by pumping stations, without the pumping stations automatically controlling their operating status according to the community's water pressure, leads to energy waste. Utility Model Content

[0004] In order to solve the technical problems in the existing technology, such as the continuous water supply to the community by pumping stations without the pumping stations automatically controlling their working status according to the water pressure of the community, resulting in energy waste, this utility model provides a comprehensive monitoring system for pumping stations.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A comprehensive monitoring system for a pumping station includes a rectifier transformer, a first power management module, a second power management module, a water pressure sensor, a first voltage comparator, a signal amplifier, and an electrical control switch module.

[0007] The input terminal of the rectifier transformer is connected to the power frequency AC power. The output terminal of the rectifier transformer is electrically connected to the input terminal of the first power management module and the power supply terminal of the electronic control switch module. The output terminal of the first power management module is electrically connected to the input terminal of the second power management module, the power supply terminal of the first voltage comparator and the power supply terminal of the signal amplifier. The output terminal of the second power management module is electrically connected to the power supply terminal of the water pressure sensor.

[0008] The output terminal of the water pressure sensor is electrically connected to the inverting input terminal of the first voltage comparator, the non-inverting input terminal of the first voltage comparator is connected to the first reference voltage, the output terminal of the first voltage comparator is electrically connected to the input terminal of the signal amplifier, the output terminal of the signal amplifier is electrically connected to the control terminal of the electronic control switch module, the power supply input terminal of the electronic control switch module is connected to the industrial frequency AC power, and the power supply output terminal of the electronic control switch module is electrically connected to the power supply terminal of the pump station motor; wherein, the electronic control switch module is a high-level triggered switch module.

[0009] The beneficial effects of this utility model are as follows: A water pressure sensor is used to collect the water pressure of the community water supply pipe, outputting a water pressure detection voltage. A first voltage comparator compares the water pressure detection voltage at the inverting input with the first reference voltage at the non-inverting input. When the water pressure of the community water supply pipe is higher than the preset water pressure value, it indicates that the water pressure is normal, and the water pressure detection voltage is higher than the first reference voltage. The first voltage comparator outputs a low-level voltage. Because the electrical control switch module is a high-level triggered switch module, it is turned off, the pump station motor is de-energized, and stops working. When the water pressure of the community water supply pipe is lower than or equal to the preset water pressure value, it indicates that the water pressure is too low to meet the community water supply requirements. The water pressure detection voltage is lower than the first reference voltage, and the first voltage comparator outputs a high-level voltage. Because the electrical control switch module is a high-level triggered switch module, it is turned on, the pump station motor is energized, and the water pressure of the community water supply pipe is increased under the operation of the pump station motor. This achieves automatic control of the pump station's working state based on the community water supply pressure, reducing energy waste in the pump station.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, it also includes a flow sensor, a second voltage comparator, and an OR gate; the power supply terminal of the flow sensor is electrically connected to the output terminal of the second power management module, the power supply terminal of the second voltage comparator is electrically connected to the output terminal of the first power management module; the output terminal of the flow sensor is electrically connected to the inverting input terminal of the second voltage comparator, the non-inverting input terminal of the second voltage comparator is connected to a second reference voltage, the output terminal of the second voltage comparator is electrically connected to one of the input terminals of the OR gate, the output terminal of the first voltage comparator is electrically connected to the other input terminal of the OR gate, and the output terminal of the OR gate is electrically connected to the input terminal of the signal amplifier.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by using a flow sensor to collect the flow rate of tap water in the community water supply pipe and outputting a flow voltage, a second voltage comparator compares the flow voltage at the inverting input terminal with the second reference voltage at the non-inverting input terminal. If the flow voltage is greater than the second reference voltage, it indicates that the flow rate of tap water in the community water supply pipe is normal, and the second voltage comparator outputs a low-level voltage signal; if the flow voltage is less than or equal to the second reference voltage, it indicates that the flow rate of tap water in the community water supply pipe is low, and the second voltage comparator outputs a high-level voltage signal; the OR gate outputs a high-level signal, and the high-level signal after signal amplification controls the electrical control switch module to conduct, so that the pump station motor is powered on and works, the pump station supplies water to the community water supply pipe, and the community water supply flow rate returns to normal.

[0013] Furthermore, the first power management module includes a first resistor, a second resistor, a first capacitor, and a second capacitor. The resistance value of the first resistor is equal to the resistance value of the second resistor. One end of the first resistor is electrically connected to the output terminal of the rectifier transformer. One end of the second resistor is electrically connected to the other end of the first resistor, one end of the first capacitor, and one end of the second capacitor. The other ends of the second resistor, the first capacitor, and the second capacitor are all grounded. One end of the second resistor is electrically connected to the input terminal of the second power management module, the power supply terminal of the first voltage comparator, the power supply terminal of the second voltage comparator, and the power supply terminal of the signal amplifier.

[0014] The beneficial effect of adopting the above-mentioned further scheme is that by using two resistors with equal resistance values ​​connected in series, the input voltage is divided, and the voltage across the second resistor is half of the input voltage, thereby realizing the voltage drop function.

[0015] Furthermore, the second power management module includes a step-down DC-DC converter chip, an inductor, a third resistor, and a fourth resistor; the input terminal of the step-down DC-DC converter chip is electrically connected to one end of the second resistor, the ground terminal of the step-down DC-DC converter chip is grounded, the output terminal of the step-down DC-DC converter chip is electrically connected to one end of the inductor, the other end of the inductor is electrically connected to one end of the third resistor, the other end of the third resistor is electrically connected to the feedback terminal of the step-down DC-DC converter chip and one end of the fourth resistor, the other end of the fourth resistor is grounded, and the other end of the inductor is electrically connected to the power supply terminal of the water pressure sensor and the power supply terminal of the flow sensor.

[0016] The advantage of adopting the above-mentioned further solution is that a step-down DC-DC converter chip is used to step down the voltage, so as to reduce the 12V input voltage to a 5V supply voltage, so as to use the 5V supply voltage to power the water pressure sensor and the flow sensor.

[0017] Furthermore, the second power management module also includes an input filtering circuit, an output filtering circuit, and a Zener diode. The input filtering circuit includes a third capacitor, a fourth capacitor, and a fifth capacitor, and the output filtering circuit includes a sixth capacitor and a seventh capacitor.

[0018] The input terminal of the buck DC-DC converter chip is electrically connected to one end of the third capacitor, one end of the fourth capacitor, and one end of the fifth capacitor, respectively. The internal voltage adjustment terminal of the buck DC-DC converter chip is electrically connected to the other end of the fifth capacitor. The other ends of the third capacitor and the other ends of the fourth capacitor are both grounded.

[0019] The other end of the inductor is electrically connected to one end of the sixth capacitor and one end of the seventh capacitor, respectively, and the other ends of the sixth capacitor and the seventh capacitor are both grounded; the negative terminal of the Zener diode is electrically connected to the output terminal of the buck DC-DC converter chip, and the positive terminal of the Zener diode is grounded.

[0020] The beneficial effect of adopting the above-mentioned further solution is that filter circuits are set at both the input and output ends to filter out noise at the input and output ends and improve the stability of the output voltage.

[0021] Furthermore, the first voltage comparator includes a fifth resistor, a sixth resistor, and a first operational amplifier, wherein the sixth resistor is a variable resistor; one end of the second resistor is electrically connected to one end of the fifth resistor and the positive terminal of the power supply terminal of the first operational amplifier, and the negative terminal of the power supply terminal of the first operational amplifier is grounded; the inverting input terminal of the first operational amplifier is electrically connected to the output terminal of the water pressure sensor; one end of the sixth resistor is electrically connected to the other end of the fifth resistor, the other end of the sixth resistor is grounded; the moving end of the sixth resistor is electrically connected to the non-inverting input terminal of the first operational amplifier; and the output terminal of the first operational amplifier is electrically connected to the other input terminal of the OR gate.

[0022] Furthermore, the second voltage comparator includes a seventh resistor, an eighth resistor, and a second operational amplifier, wherein the eighth resistor is a variable resistor; one end of the second resistor is electrically connected to one end of the seventh resistor and the positive terminal of the power supply terminal of the second operational amplifier, and the negative terminal of the power supply terminal of the second operational amplifier is grounded; the inverting input terminal of the second operational amplifier is electrically connected to the output terminal of the flow sensor; one end of the eighth resistor is electrically connected to the other end of the seventh resistor, the other end of the eighth resistor is grounded; the moving end of the eighth resistor is electrically connected to the non-inverting input terminal of the second operational amplifier; and the output terminal of the second operational amplifier is electrically connected to one of the input terminals of the OR gate.

[0023] The advantage of adopting the above-mentioned further scheme is that by using a second operational amplifier to construct a basic voltage comparator, the circuit structure of the voltage comparator is made simpler.

[0024] Furthermore, the electronically controlled switch module includes a ninth resistor, a tenth resistor, a MOSFET, and a relay;

[0025] The output terminal of the signal amplifier is electrically connected to one end of the ninth resistor, the other end of the ninth resistor is electrically connected to the gate of the MOS transistor, the source of the MOS transistor is electrically connected to one end of the tenth resistor, the other end of the tenth resistor is grounded, the drain of the MOS transistor is electrically connected to one end of the excitation coil of the relay, the other end of the excitation coil of the relay is electrically connected to the output terminal of the rectifier transformer, one end of the normally open contact of the relay is connected to the power frequency AC power, and the other end of the normally open contact of the relay is electrically connected to the power supply terminal of the pump station motor.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the pump station motor is driven by a MOSFET and a relay, and the MOSFET is used to control the on and off of the relay coil, so as to realize the low voltage driving the relay and the low voltage output of the OR gate to control the start and stop of the pump station motor.

[0027] Furthermore, the electronic control switch module also includes an emergency stop switch, one end of which is connected to the power frequency AC power, and the other end of which is electrically connected to one end of the normally open contact of the relay.

[0028] The beneficial effect of adopting the above-mentioned further solution is that, by setting an emergency stop switch, the pump station motor can be de-energized and stopped in an emergency by pressing the emergency stop switch.

[0029] Furthermore, the electronic control switch module also includes an air switch, the input terminal of which is electrically connected to the other end of the emergency stop switch, and the output terminal of which is electrically connected to one end of the normally open contact of the relay.

[0030] The beneficial effect of adopting the above-mentioned further solution is that, by setting an air switch, the power supply current of the pump station motor can be automatically cut off in the event of an overcurrent, thereby improving the safe operating performance of the pump station motor. Attached Figure Description

[0031] Figure 1 The circuit diagram of a pump station integrated monitoring system in this embodiment of the present invention is shown below. Figure 1 ;

[0032] Figure 2 The circuit diagram of a pump station integrated monitoring system in this embodiment of the present invention is shown below. Figure 1 ;

[0033] Figure 3 This is a circuit diagram of the first power management module in an embodiment of this utility model;

[0034] Figure 4 This is a circuit diagram of the second power management module in an embodiment of this utility model;

[0035] Figure 5 This is a circuit diagram of the first voltage comparator in an embodiment of the present invention;

[0036] Figure 6 This is a circuit diagram of the second voltage comparator in an embodiment of the present invention;

[0037] Figure 7 This is a circuit diagram of the electrically controlled switch module in an embodiment of this utility model.

[0038] The attached diagram lists the components represented by each number as follows:

[0039] 1. Rectifier transformer; 2. First power management module; 3. Second power management module; 4. Water pressure sensor; 5. First voltage comparator; 6. Signal amplifier; 7. Electrical control switch module; 8. Flow sensor; 9. Second voltage comparator; 10. OR gate. Detailed Implementation

[0040] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0041] like Figure 1As shown, this embodiment provides a comprehensive monitoring system for a pumping station, including a rectifier transformer 1, a first power management module 2, a second power management module 3, a water pressure sensor 4, a first voltage comparator 5, a signal amplifier 6, and an electronic control switch module 7; wherein, the electronic control switch module 7 is a high-level triggered switch module; the rectifier transformer 1 is a transformer that rectifies a 220V AC voltage to output a 24V DC voltage, the input voltage of the first power management module 2 is 24V, the output voltage of the first power management module 2 is 12V, the output voltage of the second power management module 3 is 5V, and the signal amplifier 6 is a non-inverting amplifier.

[0042] The input terminal of rectifier transformer 1 is connected to 220V power frequency AC. The output terminal of rectifier transformer 1 is electrically connected to the input terminal of the first power management module 2 and the power supply terminal of the electric control switch module 7. The output terminal of the first power management module 2 is electrically connected to the input terminal of the second power management module 3, the power supply terminal of the first voltage comparator 5 and the power supply terminal of the signal amplifier 6. The output terminal of the second power management module 3 is electrically connected to the power supply terminal of the water pressure sensor 4.

[0043] The output terminal of the water pressure sensor 4 is electrically connected to the inverting input terminal of the first voltage comparator 5. The non-inverting input terminal of the first voltage comparator 5 is connected to the first reference voltage. The output terminal of the first voltage comparator 5 is electrically connected to the input terminal of the signal amplifier 6. The output terminal of the signal amplifier 6 is electrically connected to the control terminal of the electric control switch module 7. The power supply input terminal of the electric control switch module 7 is connected to the power frequency AC power. The power supply output terminal of the electric control switch module 7 is electrically connected to the power supply terminal of the pump station motor M.

[0044] This embodiment of the invention utilizes a water pressure sensor 4 to collect the water pressure of the community water supply pipe and outputs a water pressure detection voltage. A first voltage comparator 5 compares the water pressure detection voltage at the inverting input with a first reference voltage at the non-inverting input. When the water pressure in the community water supply pipe is higher than a preset value, it indicates that the water pressure is normal, and the water pressure detection voltage is higher than the first reference voltage. The first voltage comparator 5 then outputs a low-level voltage. Because the electronic control switch module 7 is a high-level triggered switch module, it is turned off, and the pump station motor M is de-energized and stops working. When the water pressure in the community water supply pipe is lower than or equal to the preset value, it indicates that the water pressure is too low to meet the community water supply requirements. The water pressure detection voltage is lower than the first reference voltage, and the first voltage comparator 5 outputs a high-level voltage. Because the electronic control switch module 7 is a high-level triggered switch module, it is turned on, and the pump station motor M is energized and begins to work. The water pressure in the community water supply pipe is increased under the operation of the pump station motor M, thereby achieving automatic control of the pump station's working state based on the community water supply pressure and reducing energy waste in the pump station.

[0045] like Figure 2As shown, in some embodiments, the integrated monitoring system for the pumping station further includes a flow sensor 8, a second voltage comparator 9, and an OR gate 10; the power supply terminal of the flow sensor 8 is electrically connected to the output terminal of the second power management module 3, and the power supply terminal of the second voltage comparator 9 is electrically connected to the output terminal of the first power management module 2; the output terminal of the flow sensor 8 is electrically connected to the inverting input terminal of the second voltage comparator 9, the non-inverting input terminal of the second voltage comparator 9 is connected to a second reference voltage, the output terminal of the second voltage comparator 9 is electrically connected to one of the input terminals of the OR gate 10, the output terminal of the first voltage comparator 5 is electrically connected to the other input terminal of the OR gate 10, and the output terminal of the OR gate 10 is electrically connected to the input terminal of the signal amplifier 6; wherein, the flow sensor 8 is used to collect the water flow in the community water supply pipe to output a flow voltage signal.

[0046] In this embodiment, the flow rate of tap water in the community water supply pipe is collected by the flow sensor 8 and output as a flow voltage. The flow voltage at the inverting input terminal is compared with the second reference voltage at the non-inverting input terminal by the second voltage comparator 9. If the flow voltage is greater than the second reference voltage, it indicates that the flow rate of tap water in the community water supply pipe is normal, and the second voltage comparator 9 outputs a low-level voltage signal. If the flow voltage is less than or equal to the second reference voltage, it indicates that the flow rate of tap water in the community water supply pipe is low, and the second voltage comparator 9 outputs a high-level voltage signal. The OR gate 10 outputs a high-level signal, and the high-level signal after signal amplification controls the conduction of the electric control switch module 7, so the pump station motor M is powered on and works, and the pump station supplies water to the community water supply pipe, and the community water supply flow rate returns to normal.

[0047] like Figure 3 As shown, the first power management module 2 includes a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2. The resistance value of the first resistor R1 is equal to the resistance value of the second resistor R2. One end of the first resistor R1 is electrically connected to the output terminal of the rectifier transformer 1. One end of the second resistor R2 is electrically connected to the other end of the first resistor R1, one end of the first capacitor C1, and one end of the second capacitor C2. The other ends of the second resistor R2, the first capacitor C1, and the second capacitor C2 are all grounded. One end of the second resistor R2 is electrically connected to the input terminal of the second power management module 3, the power supply terminal of the first voltage comparator 5, the power supply terminal of the second voltage comparator 9, and the power supply terminal of the signal amplifier 6. A 24V voltage is applied to one end of the series-connected first resistor R1 and second resistor R2, and the other end of the series-connected first resistor R1 and second resistor R2 is grounded. Since the resistance values ​​of the first resistor R1 and second resistor R2 are equal, the voltage across the second resistor R2 is 12V.

[0048] Two resistors with equal resistance values ​​are connected in series to divide the input voltage. The voltage across the second resistor R2 is half of the input voltage, thus achieving the voltage drop function.

[0049] like Figure 4 As shown, in some embodiments, the second power management module 3 includes a buck DC-DC converter chip U1, an inductor L1, a third resistor R3, a fourth resistor R4, an input filter circuit, an output filter circuit, and a Zener diode D1. The input terminal VIN of the buck DC-DC converter chip U1 is electrically connected to one end of the second resistor R2. The ground terminal of the buck DC-DC converter chip U1 is grounded. The output terminal SW of the buck DC-DC converter chip U1 is electrically connected to one end of the inductor L1. The other end of the inductor L1 is electrically connected to one end of the third resistor R3. The other end of the third resistor R3 is electrically connected to the feedback terminal FB of the buck DC-DC converter chip U1 and one end of the fourth resistor R4. The other end of the fourth resistor R4 is grounded. The other end of the inductor L1 is electrically connected to the power supply terminals of the water pressure sensor 4 and the flow sensor 8. The buck DC-DC converter chip U1 is selected as the XL4015 model.

[0050] The input filtering circuit includes a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5, while the output filtering circuit includes a sixth capacitor C6 and a seventh capacitor C7.

[0051] The input terminal of the buck DC-DC converter chip U1 is electrically connected to one end of the third capacitor C3, one end of the fourth capacitor C4, and one end of the fifth capacitor C5, respectively. The internal voltage regulation terminal VC of the buck DC-DC converter chip U1 is electrically connected to the other end of the fifth capacitor C5. The other ends of the third capacitor C3 and the other ends of the fourth capacitor C4 are both grounded.

[0052] The other end of inductor L1 is electrically connected to one end of the sixth capacitor C6 and one end of the seventh capacitor C7, respectively. The other ends of the sixth capacitor C6 and the seventh capacitor C7 are both grounded. The negative terminal of Zener diode D1 is electrically connected to the output terminal of buck DC-DC converter chip U1, and the positive terminal of Zener diode D1 is grounded.

[0053] This embodiment uses a step-down DC-DC converter chip U1 to step down the 12V input voltage to a 5V supply voltage, so that the 5V supply voltage can be used to power the water pressure sensor 4 and the flow sensor 8. Filter circuits are set at both the input and output ends to filter out noise at the input and output ends and improve the stability of the output voltage.

[0054] like Figure 5As shown, in some embodiments, the first voltage comparator 5 includes a fifth resistor R5, a sixth resistor R6, and a first operational amplifier U2, wherein the sixth resistor R6 is a variable resistor; one end of the second resistor R2 is electrically connected to one end of the fifth resistor R5 and the positive terminal of the power supply terminal of the first operational amplifier U2, and the negative terminal of the power supply terminal of the first operational amplifier U2 is grounded; the inverting input terminal of the first operational amplifier U2 is electrically connected to the output terminal of the water pressure sensor 4; one end of the sixth resistor R6 is electrically connected to the other end of the fifth resistor R5, the other end of the sixth resistor R6 is grounded, the moving end of the sixth resistor R6 is electrically connected to the non-inverting input terminal of the first operational amplifier U2, and the output terminal of the first operational amplifier U2 is electrically connected to the other input terminal of the OR gate 10. The first reference voltage VREF1 is the moving end voltage of the sixth resistor R6. By setting the sixth resistor R6 as a variable resistor, the value of the first reference voltage VREF1 can be changed by moving the moving end of the variable resistor to match specific scenario requirements.

[0055] like Figure 6 As shown, in some embodiments, the second voltage comparator 9 includes a seventh resistor R7, an eighth resistor R8, and a second operational amplifier U3. The eighth resistor R8 is a variable resistor. One end of the second resistor R2 is electrically connected to one end of the seventh resistor R7 and the positive terminal of the power supply of the second operational amplifier U3, respectively. The negative terminal of the power supply of the second operational amplifier U3 is grounded. The inverting input terminal of the second operational amplifier U3 is electrically connected to the output terminal of the flow sensor 8. One end of the eighth resistor R8 is electrically connected to the other end of the seventh resistor R7. The other end of the eighth resistor R8 is grounded. The moving end of the eighth resistor R8 is electrically connected to the non-inverting input terminal of the second operational amplifier U3. The output terminal of the second operational amplifier U3 is electrically connected to one of the input terminals of the OR gate 10. The second reference voltage VREF2 is the moving end voltage of the eighth resistor R8. By setting the eighth resistor R8 as a variable resistor, the value of the second reference voltage VREF2 can be changed by moving the moving end of the variable resistor to match specific scenario requirements. By using the second operational amplifier U3 to construct a basic voltage comparator, the circuit structure of the voltage comparator is simplified.

[0056] like Figure 7 As shown, in some embodiments, the electronically controlled switch module 7 includes a ninth resistor R9, a tenth resistor R9, a MOSFET Q1, a relay K1, an emergency stop switch S1, an air switch QF, and a diode D2.

[0057] The output terminal of signal amplifier 6 is electrically connected to one end of the ninth resistor R9. The other end of the ninth resistor R9 is electrically connected to the gate of MOSFET Q1. The source of MOSFET Q1 is electrically connected to one end of the tenth resistor R9, and the other end of the tenth resistor R9 is grounded. The drain of MOSFET Q1 is electrically connected to one end of the excitation coil of relay K1. The other end of the excitation coil of relay K1 is electrically connected to the output terminal of rectifier transformer 1. One end of the normally open contact of relay K1 is connected to the power frequency AC current, and the other end of the normally open contact of relay K1 is electrically connected to the power supply terminal of pump station motor M. The anode of diode D2 is electrically connected to one end of the excitation coil of relay K1, and the cathode of diode D2 is electrically connected to the other end of the excitation coil of relay K1.

[0058] One end of the emergency stop switch S1 is connected to the mains frequency AC power, and the other end of the emergency stop switch S1 is electrically connected to one end of the normally open contact of the relay K1. The input terminal of the air circuit breaker QF is electrically connected to the other end of the emergency stop switch S1, and the output terminal of the air circuit breaker QF is electrically connected to one end of the normally open contact of the relay K1.

[0059] In this embodiment of the invention, when the gate input signal of MOSFET Q1 is a high-level voltage signal, MOSFET Q1 is turned on, and the coil of relay K1 is energized. One end of the two normally open contacts of relay K1 is connected to the neutral line N and the live line L of a 220V AC power supply, respectively, and the other end of the two normally open contacts of relay K1 is connected to the two power supply terminals of pump station motor M, respectively. MOSFET Q1 and relay K1 constitute the drive switch for pump station motor M. MOSFET Q1 controls the on / off state of the coil of relay K1, thereby achieving low-voltage drive of relay K1 and low-voltage control of pump station motor M using the output of OR gate 10. By setting an emergency stop switch S1, in an emergency, pressing the emergency stop switch S1 can de-energize and stop pump station motor M. This design can automatically cut off the power supply current of pump station motor M in the event of an overcurrent, improving the safe operation performance of pump station motor M.

[0060] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the concept and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A comprehensive monitoring system for pumping stations, characterized in that: It includes a rectifier transformer (1), a first power management module (2), a second power management module (3), a water pressure sensor (4), a first voltage comparator (5), a signal amplifier (6), and an electronic control switch module (7); The input terminal of the rectifier transformer (1) is connected to the power frequency AC power. The output terminal of the rectifier transformer (1) is electrically connected to the input terminal of the first power management module (2) and the power supply terminal of the power control switch module (7). The output terminal of the first power management module (2) is electrically connected to the input terminal of the second power management module (3), the power supply terminal of the first voltage comparator (5), and the power supply terminal of the signal amplifier (6). The output terminal of the second power management module (3) is electrically connected to the power supply terminal of the water pressure sensor (4). The output terminal of the water pressure sensor (4) is electrically connected to the inverting input terminal of the first voltage comparator (5), the non-inverting input terminal of the first voltage comparator (5) is connected to the first reference voltage, the output terminal of the first voltage comparator (5) is electrically connected to the input terminal of the signal amplifier (6), the output terminal of the signal amplifier (6) is electrically connected to the control terminal of the electric control switch module (7), the power supply input terminal of the electric control switch module (7) is connected to the power frequency AC power, and the power supply output terminal of the electric control switch module (7) is electrically connected to the power supply terminal of the pump station motor (M); wherein, the electric control switch module (7) is a high-level triggered switch module.

2. The integrated monitoring system for pumping stations according to claim 1, characterized in that: It also includes a flow sensor (8), a second voltage comparator (9), and an OR gate (10); the power supply terminal of the flow sensor (8) is electrically connected to the output terminal of the second power management module (3), the power supply terminal of the second voltage comparator (9) is electrically connected to the output terminal of the first power management module (2); the output terminal of the flow sensor (8) is electrically connected to the inverting input terminal of the second voltage comparator (9), the non-inverting input terminal of the second voltage comparator (9) is connected to a second reference voltage, the output terminal of the second voltage comparator (9) is electrically connected to one of the input terminals of the OR gate (10), the output terminal of the first voltage comparator (5) is electrically connected to the other input terminal of the OR gate (10), and the output terminal of the OR gate (10) is electrically connected to the input terminal of the signal amplifier (6).

3. The integrated monitoring system for pumping stations according to claim 2, characterized in that: The first power management module (2) includes a first resistor (R1), a second resistor (R2), a first capacitor (C1), and a second capacitor (C2). The resistance value of the first resistor (R1) is equal to the resistance value of the second resistor (R2). One end of the first resistor (R1) is electrically connected to the output terminal of the rectifier transformer (1). One end of the second resistor (R2) is electrically connected to the other end of the first resistor (R1), one end of the first capacitor (C1), and one end of the second capacitor (C2). The other end of the second resistor (R2), the other end of the first capacitor (C1), and the other end of the second capacitor (C2) are all grounded. One end of the second resistor (R2) is electrically connected to the input terminal of the second power management module (3), the power supply terminal of the first voltage comparator (5), the power supply terminal of the second voltage comparator (9), and the power supply terminal of the signal amplifier (6).

4. The integrated monitoring system for pumping stations according to claim 3, characterized in that: The second power management module (3) includes a step-down DC-DC converter chip (U1), an inductor (L1), a third resistor (R3), and a fourth resistor (R4). The input terminal of the step-down DC-DC converter chip (U1) is electrically connected to one end of the second resistor (R2). The ground terminal of the step-down DC-DC converter chip (U1) is grounded. The output terminal of the step-down DC-DC converter chip (U1) is electrically connected to one end of the inductor (L1). The other end of the inductor (L1) is electrically connected to one end of the third resistor (R3). The other end of the third resistor (R3) is electrically connected to the feedback terminal of the step-down DC-DC converter chip (U1) and one end of the fourth resistor (R4). The other end of the fourth resistor (R4) is grounded. The other end of the inductor (L1) is electrically connected to the power supply terminal of the water pressure sensor (4) and the power supply terminal of the flow sensor (8).

5. The integrated monitoring system for pumping stations according to claim 4, characterized in that: The second power management module (3) also includes an input filter circuit, an output filter circuit, and a Zener diode (D1). The input filter circuit includes a third capacitor (C3), a fourth capacitor (C4), and a fifth capacitor (C5). The output filter circuit includes a sixth capacitor (C6) and a seventh capacitor (C7). The input terminal of the buck DC-DC converter chip (U1) is electrically connected to one end of the third capacitor (C3), one end of the fourth capacitor (C4), and one end of the fifth capacitor (C5), respectively. The internal voltage adjustment terminal of the buck DC-DC converter chip (U1) is electrically connected to the other end of the fifth capacitor (C5). The other ends of the third capacitor (C3) and the fourth capacitor (C4) are both grounded. The other end of the inductor (L1) is electrically connected to one end of the sixth capacitor (C6) and one end of the seventh capacitor (C7), respectively. The other ends of the sixth capacitor (C6) and the seventh capacitor (C7) are both grounded. The negative terminal of the Zener diode (D1) is electrically connected to the output terminal of the buck DC-DC converter chip (U1), and the positive terminal of the Zener diode (D1) is grounded.

6. The integrated monitoring system for pumping stations according to claim 4, characterized in that: The first voltage comparator (5) includes a fifth resistor (R5), a sixth resistor (R6), and a first operational amplifier (U2). The sixth resistor (R6) is a variable resistor. One end of the second resistor (R2) is electrically connected to one end of the fifth resistor (R5) and the positive terminal of the power supply terminal of the first operational amplifier (U2). The negative terminal of the power supply terminal of the first operational amplifier (U2) is grounded. The inverting input terminal of the first operational amplifier (U2) is electrically connected to the output terminal of the water pressure sensor (4). One end of the sixth resistor (R6) is electrically connected to the other end of the fifth resistor (R5). The other end of the sixth resistor (R6) is grounded. The moving end of the sixth resistor (R6) is electrically connected to the non-inverting input terminal of the first operational amplifier (U2). The output terminal of the first operational amplifier (U2) is electrically connected to the other input terminal of the OR gate (10).

7. The integrated monitoring system for pumping stations according to claim 4, characterized in that: The second voltage comparator (9) includes a seventh resistor (R7), an eighth resistor (R8), and a second operational amplifier (U3). The eighth resistor (R8) is a variable resistor. One end of the second resistor (R2) is electrically connected to one end of the seventh resistor (R7) and the positive terminal of the power supply terminal of the second operational amplifier (U3). The negative terminal of the power supply terminal of the second operational amplifier (U3) is grounded. The inverting input terminal of the second operational amplifier (U3) is electrically connected to the output terminal of the flow sensor (8). One end of the eighth resistor (R8) is electrically connected to the other end of the seventh resistor (R7). The other end of the eighth resistor (R8) is grounded. The moving end of the eighth resistor (R8) is electrically connected to the non-inverting input terminal of the second operational amplifier (U3). The output terminal of the second operational amplifier (U3) is electrically connected to one of the input terminals of the OR gate (10).

8. The integrated monitoring system for pumping stations according to claim 1, characterized in that: The electronically controlled switch module (7) includes a ninth resistor (R9), a tenth resistor (R9), a MOSFET (Q1), and a relay (K1); The output terminal of the signal amplifier (6) is electrically connected to one end of the ninth resistor (R9), the other end of the ninth resistor (R9) is electrically connected to the gate of the MOS transistor (Q1), the source of the MOS transistor (Q1) is electrically connected to one end of the tenth resistor (R9), the other end of the tenth resistor (R9) is grounded, the drain of the MOS transistor (Q1) is electrically connected to one end of the excitation coil of the relay (K1), the other end of the excitation coil of the relay (K1) is electrically connected to the output terminal of the rectifier transformer (1), one end of the normally open contact of the relay (K1) is connected to the power frequency AC power, and the other end of the normally open contact of the relay (K1) is electrically connected to the power supply terminal of the pump station motor (M).

9. The integrated monitoring system for pumping stations according to claim 8, characterized in that: The electrical control switch module (7) also includes an emergency stop switch (S1), one end of which is connected to the power frequency AC power, and the other end of which is electrically connected to one end of the normally open contact of the relay (K1).

10. The integrated monitoring system for pumping stations according to claim 9, characterized in that: The electronic control switch module (7) also includes an air switch (QF), the input terminal of which is electrically connected to the other end of the emergency stop switch (S1), and the output terminal of which is electrically connected to one end of the normally open contact of the relay (K1).

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