Double-pump constant-pressure water supply system and control cabinet thereof

Abstract

The utility model relates to a double-pump constant-pressure water supply system and a control cabinet thereof, and the system comprises a power supply module which is used for providing power input for the system, comprises a three-phase AC power supply, a circuit breaker and a thermal relay, and is used for carrying out overload protection on a circuit; the control module comprises a manual / automatic switching device and a relay control loop, and the relay control loop is used for controlling alternate operation and constant-pressure water supply of the double water pumps; the signal acquisition module comprises a teletransmission pressure gauge PT and a liquid level sensor LT which are respectively used for acquiring a water supply pressure signal and a water tank liquid level signal and transmitting the signals to the control module; the execution module comprises at least two water pumps, and the water pumps are driven by the control module to operate to achieve water supply; an alarm module; comprising an alarm indicating lamp and a buzzer and is used for prompting system faults or abnormal states.

Description

Technical Field

[0001] This utility model relates to a dual-pump constant pressure water supply system and its control cabinet, belonging to the field of water supply systems. Background Technology

[0002] Currently, most common water supply systems operate with a single pump, which cannot meet peak water demand. Furthermore, because the pumps operate continuously for extended periods, they are prone to overload or rapid wear and tear. In addition, existing technologies for regulating water pressure are relatively simple, making it difficult to achieve efficient and stable constant-pressure water supply. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a dual-pump constant pressure water supply system and its control cabinet.

[0004] A dual-pump constant pressure water supply system and its control cabinet, including

[0005] The power supply module provides power input to the system, including a three-phase AC power supply, circuit breakers, and thermal relays, and is used for overload protection of the circuit.

[0006] The control module includes a manual / automatic switching device and a relay control circuit, wherein the relay control circuit is used to control the alternating operation of the two water pumps and constant pressure water supply;

[0007] The signal acquisition module includes a remote pressure gauge PT and a liquid level sensor LT, which are used to acquire water supply pressure signals and water tank liquid level signals, respectively, and transmit the signals to the control module.

[0008] The execution module includes at least two water pumps, which are driven by a control module to supply water.

[0009] Alarm module; including alarm indicator lights and buzzers, used to indicate system malfunctions or abnormal conditions.

[0010] Preferably, the control module includes

[0011] The first relay KM1 and the second relay KM2 are used to control the start and stop of the first water pump M1;

[0012] The third relay KM3 and the fourth relay KM4 are used to control the start and stop of the second water pump M2;

[0013] Manual / automatic switch, allowing users to select manual or automatic operation mode.

[0014] Preferably, the remote pressure gauge PT in the signal acquisition module is set with a pressure threshold. When the water supply pressure is lower than the set value, the control module starts the water pump to replenish the pressure; when the pressure reaches the set value, the water pump stops running.

[0015] Furthermore, the liquid level sensor LT in the signal acquisition module is set with high and low liquid level thresholds: when the liquid level is lower than the set lower limit, the control module stops the water pump and triggers the alarm module; when the liquid level is higher than the set upper limit, the control module keeps the water pump stopped.

[0016] Preferably, the two water pumps of the execution module are operated alternately via relays, and the control module can control the two water pumps to operate simultaneously via control logic.

[0017] Preferably, the alarm module includes triggering a buzzer BZ to emit an audible and visual alarm signal when the water pump is overloaded or the power supply is interrupted; after the system fault is cleared, the alarm signal can be manually cleared by resetting the reset switch RST.

[0018] Preferably, the control module has a redundant design, and when one water pump fails, the system automatically switches to another water pump to ensure continuous water supply; the fault information is output through the alarm module.

[0019] Preferably, the water pump drive module is connected to a frequency converter, and the constant pressure water supply function is achieved through frequency conversion control.

[0020] This utility model also provides a control cabinet for a dual-pump constant pressure water supply system, for installing any of the above-mentioned dual-pump constant pressure water supply systems. The control cabinet includes a cabinet body, and the cabinet body is provided with buttons for controlling each module of the system.

[0021] Preferably, the cabinet is also equipped with several indicator lights for indicating the system status.

[0022] The beneficial effects of this invention are as follows: Alternating operation of the two pumps effectively extends the service life of the water pumps and reduces the risk of single-pump overload operation. The combination of a remote pressure gauge and a frequency converter enables a highly efficient and energy-saving constant pressure water supply function. Circuit breakers and thermal relays provide overload protection for the circuit, and the liquid level sensor effectively prevents idling. The control module supports both manual and automatic modes to meet the needs of different users. The alarm module promptly issues fault alarms, facilitating quick problem location and troubleshooting for users. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0024] Figure 1 This is a circuit diagram of the motor drive for the water supply system of this utility model;

[0025] Figure 2 This is the circuit control diagram of the water supply system of this utility model;

[0026] Figure 3 This is a diagram of the inverter terminals for the water supply system of this utility model;

[0027] Figure 4 This is a structural diagram of the control cabinet of this utility model;

[0028] In the diagram, 1 is the cabinet; 2 is the button; and 3 is the indicator light. Detailed Implementation

[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0030] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0031] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0032] like Figure 1-3 The diagram illustrates an embodiment of a dual-pump constant-pressure water supply system according to this invention. It includes a power supply module for providing power input to the system, comprising a three-phase AC power supply, a circuit breaker, and a thermal relay for overload protection; a control module for controlling the alternating operation of the two pumps and constant-pressure water supply; a signal acquisition module for acquiring water supply pressure signals and water tank level signals, respectively, and transmitting these signals to the control module; an execution module for at least two pumps driven by the control module to supply water; and an alarm module for indicating system faults or abnormal conditions, including an alarm indicator and a buzzer.

[0033] By alternating operation of dual pumps, the service life of the water pumps is effectively extended, and the risk of single pump overload operation is reduced. The combination of a remote pressure gauge and a frequency converter enables a highly efficient and energy-saving constant pressure water supply function. Circuit breakers and thermal relays provide overload protection for the circuit, and a liquid level sensor effectively prevents dry running. The control module supports both manual and automatic modes to meet the needs of different users. The alarm module promptly issues fault alarms, facilitating users to quickly locate and troubleshoot problems.

[0034] When implementing this system, the power supply module, control module, signal acquisition module, and alarm module are connected sequentially. Manual or automatic operation mode can be selected according to user needs. After debugging, system parameters are adjusted based on actual water supply requirements to achieve optimal operating conditions.

[0035] The control module includes a first relay KM1 and a second relay KM2 for controlling the start and stop of the first water pump M1; a third relay KM3 and a fourth relay KM4 for controlling the start and stop of the second water pump M2; and a manual / automatic switch for the user to select manual or automatic operation mode.

[0036] The control module is the core of this system, mainly including a manual / automatic switch SA1, start buttons SB1 and SB2, stop buttons SB3 and SB4, and multiple sets of relays KM1, KM2, KM3, and KM4. In automatic mode, the relay logic enables the dual pumps to operate alternately, balancing the load and extending the pump life; in manual mode, the user can control the operation of a single pump as needed.

[0037] The remote pressure gauge PT in the signal acquisition module is set with a pressure threshold. When the water supply pressure is lower than the set value, the control module starts the water pump to replenish the pressure; when the pressure reaches the set value, the water pump stops running.

[0038] The liquid level sensor LT in the signal acquisition module is set with high and low liquid level thresholds: when the liquid level is lower than the set lower limit, the control module stops the water pump and triggers the alarm module; when the liquid level is higher than the set upper limit, the control module keeps the water pump stopped.

[0039] The two water pumps in the execution module operate alternately via relays, and the control module can control the two pumps to run simultaneously through control logic. The frequency converter (VFD) receives real-time pressure feedback signals through a remote pressure gauge (PT) and adjusts the pump speed according to the set value. The control module communicates with the frequency converter via digital signals to achieve constant pressure water supply.

[0040] The alarm module includes a function that triggers a buzzer BZ to emit an audible and visual alarm signal when the water pump is overloaded or the power supply is interrupted; after the system fault is cleared, the alarm signal can be manually cleared by a reset switch RST.

[0041] The alarm module includes indicator lights HL1 and HL2 and a buzzer BZ, which are connected to the control module. When a system malfunction occurs (such as pump overload, liquid level below the lower limit, or control circuit failure), the alarm module emits an audible and visual signal to alert the user, and the alarm status is cleared by the reset switch RST.

[0042] The control module has a redundant design. When one water pump fails, the system automatically switches to another water pump to ensure continuous water supply. Fault information is output through the alarm module.

[0043] The water pump drive module is connected to the frequency converter, and the constant pressure water supply function is achieved through frequency conversion control.

[0044] See Figure 1 The circuit is equipped with thermal relays FR1 and FR2, which automatically cut off the circuit when the motor is overloaded, preventing damage to the equipment due to high temperatures. Each motor's control circuit is relatively independent, allowing for individual maintenance or replacement of components (such as contactors or thermal relays), improving system maintainability. Expansion to a multi-pump system is also relatively easy. The system supports alternating operation of dual pumps, preventing excessive wear caused by prolonged operation of a single pump and extending motor life; simultaneously, the coordinated operation of dual pumps increases water supply capacity.

[0045] See Figure 2 Thermal relay KA1 is connected to the motor load circuit to monitor the motor's operating status, prevent overload operation, and ensure system safety. Relays KM1, KM2, KM3, and KM4 in the diagram are mainly used to control the start and stop of the two water pumps, M1 and M2. Remote pressure gauges at terminals 81 and 82 collect real-time water supply pressure data and transmit the feedback signal to the control system.

[0046] See Figure 3 KM1 and KM2 control the operation of water pump M1. KM3 and KM4 control the operation of water pump M2.

[0047] See Figure 4 This utility model also provides a control cabinet for a dual-pump constant pressure water supply system, for installing any of the above-mentioned dual-pump constant pressure water supply systems. The control cabinet includes a cabinet body 1, and the cabinet body 1 is provided with buttons 2 for controlling each module of the system.

[0048] The cabinet 1 is also equipped with several indicator lights 3 for indicating the system status.

[0049] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0050] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A dual-pump constant pressure water supply system, characterized in that: include The power supply module provides power input to the system, including a three-phase AC power supply, circuit breakers, and thermal relays, and is used for overload protection of the circuit. The control module includes a manual / automatic switching device and a relay control circuit, wherein the relay control circuit is used to control the alternating operation of the two water pumps and constant pressure water supply; The signal acquisition module includes a remote pressure gauge PT and a liquid level sensor LT, which are used to acquire water supply pressure signals and water tank liquid level signals, respectively, and transmit the signals to the control module. The execution module includes at least two water pumps, which are driven by the control module to supply water; the alarm module includes an alarm indicator light and a buzzer to indicate system malfunctions or abnormal conditions.

2. The dual-pump constant pressure water supply system as described in claim 1, characterized in that: The control module includes The first relay KM1 and the second relay KM2 are used to control the start and stop of the first water pump M1; The third relay KM3 and the fourth relay KM4 are used to control the start and stop of the second water pump M2; Manual / automatic switch, allowing users to select manual or automatic operation mode.

3. The dual-pump constant pressure water supply system as described in claim 1, characterized in that: The remote pressure gauge PT in the signal acquisition module is set with a pressure threshold. When the water supply pressure is lower than the set value, the control module starts the water pump to replenish the pressure; when the pressure reaches the set value, the water pump stops running.

4. The dual-pump constant pressure water supply system as described in claim 2, characterized in that: The liquid level sensor LT in the signal acquisition module is set with high and low liquid level thresholds: when the liquid level is lower than the set lower limit, the control module stops the water pump and triggers the alarm module; when the liquid level is higher than the set upper limit, the control module keeps the water pump stopped.

5. The dual-pump constant pressure water supply system as described in claim 1, characterized in that: The two water pumps of the execution module are operated alternately via relays, and the control module can control the two water pumps to run simultaneously through control logic.

6. The dual-pump constant pressure water supply system as described in claim 1, characterized in that: The alarm module includes a function that triggers a buzzer BZ to emit an audible and visual alarm signal when the water pump is overloaded or the power supply is interrupted; after the system fault is cleared, the alarm signal can be manually cleared by a reset switch RST.

7. The dual-pump constant pressure water supply system as described in claim 1, characterized in that: The control module has a redundant design. When one water pump fails, the system automatically switches to another water pump to ensure continuous water supply. Fault information is output through the alarm module.

8. The dual-pump constant pressure water supply system as described in claim 1, characterized in that: The water pump drive module is connected to the frequency converter, and the constant pressure water supply function is achieved through frequency conversion control.

9. A control cabinet for a dual-pump constant pressure water supply system, characterized in that: For installing any of the dual-pump constant pressure water supply systems of claims 1-8, the control cabinet includes a cabinet body, and the cabinet body is provided with buttons for controlling each module of the system.

10. The control cabinet for the dual-pump constant pressure water supply system as described in claim 9, characterized in that: The cabinet is also equipped with several indicator lights to indicate the system status.

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