Fire-fighting dual-power stabilizing pump control circuit of distribution box

Abstract

The utility model relates to a distribution box technical field discloses a distribution box's fire control dual -power voltage stabilizing pump control circuit, including dual -power switching device, operating transformer, voltage current monitoring component, surge protector and back -up protector, the main branch output end of dual -power switching device first with main pump circuit breaker series connection, passes through the cable electric connection to main spraying system voltage stabilizing pump again, the output end of operating transformer is electrically connected with change -over switch through the fuse, and voltage current monitoring component is electrically connected with fire control control room through communication bus, the standby branch output end of dual -power switching device is provided with standby pump component. In the utility model, through dual -power switching device, surge protector and back -up protector etc. Structure, realized main spraying voltage stabilizing pump's reliable start -stop, automatic and manual mode switching, running and fault state feedback, electric surge protection and strong and weak electricity isolation function, guarantee main pump's stable and reliable controllable operation.

Description

Technical Field

[0001] This utility model relates to the field of distribution box technology, and in particular to a fire-fighting dual-power stabilizing pump control circuit for a distribution box. Background Technology

[0002] The use of this technology is to adapt to the needs of fire protection scenarios: automatic switching between main and backup power supplies avoids the shutdown of the pressure-stabilizing pump due to power outages, and can automatically monitor the pressure of the fire protection pipeline network, starting the pump when the pressure is low and stopping it when the pressure reaches the standard, maintaining stable pressure, ensuring reliable system operation in emergencies, and guaranteeing the safety of fire water supply.

[0003] During use, the main pump may become unstable. If the main pump fails to operate, the sprinkler system will lose pressure. In the event of a fire, insufficient water output will make it difficult to control the fire when it first starts, endangering personal and property safety. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a fire-fighting dual-power stabilizing pump control circuit for a distribution box, aiming to improve the problem of unstable operation of the main pump.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fire-fighting dual-power stabilizing pump control circuit for a distribution box, comprising a dual-power switching device, an operating transformer, a voltage and current monitoring component, a surge protector, and a backup protector. The main branch output of the dual-power switching device is first connected in series with the main pump circuit breaker, and then electrically connected to the main sprinkler system stabilizing pump via a cable. The output of the operating transformer is electrically connected to a changeover switch via a fuse. One path of the changeover switch is connected in series with the main pump start button and stop button, and then electrically connected to the coil of the main pump control and protection switch. The other path of the changeover switch is connected in series with a time relay and an intermediate relay, and then connected to the coil. The auxiliary contacts of the coil are connected in series with a running indicator light and a fault indicator light, respectively, and the other ends of both indicator lights are electrically connected to the neutral terminal of the operating transformer. The voltage acquisition interface of the voltage and current monitoring component is connected in parallel to the power supply path of the main pump, and the current acquisition interface is connected in series to the power supply path of the main pump. The voltage and current monitoring component is electrically connected to the fire control room via a communication bus. A backup pump component is provided at the backup branch output of the dual-power switching device.

[0006] The above technical solution involves: the main pump being powered by the main branch of a dual-power switching device and protected by a circuit breaker; the control circuit being powered by an operating transformer and protected by a fuse; and a transfer switch enabling manual / automatic control. Manual control is achieved via a start / stop button, while automatic control is triggered by a time relay and an intermediate relay. The control and protection switch drives the pump and provides status feedback via a fault indicator light. Voltage and current monitoring components measure voltage in parallel and current in series. Data is uploaded to the fire control room via a communication bus for remote monitoring and early warning. Combined with surge protectors and backup protectors, the system's reliability and safety are enhanced.

[0007] Preferably, the standby pump assembly includes a standby pump circuit breaker and the main contacts of a standby pump control and protection switch. The main contacts of the standby pump circuit breaker and the standby pump control and protection switch are connected in series in the standby branch output terminal of the dual power supply switching device, and are electrically connected to the standby fire hydrant system voltage stabilizing pump via a cable. The output terminal of the operating transformer is connected to the standby pump control position of the transfer switch via a fuse in the standby control circuit. The output terminal of the standby pump control position is divided into two paths. One path is connected in series with the standby pump start button and the standby pump stop button and then connected to the coil of the standby pump control and protection switch. The other path is connected in series with the normally open contact of the intermediate relay and then connected to the coil of the standby pump control and protection switch. The coil of the intermediate relay is electrically connected to the fault auxiliary contact of the main pump control and protection switch. The auxiliary contacts of the standby pump control and protection switch are connected in series with the standby pump running indicator light and the standby pump fault indicator light, respectively. The other end of the standby pump running indicator light and the standby pump fault indicator light are both electrically connected to the neutral terminal of the operating transformer.

[0008] Preferably, the surge protector and the backup protector are connected in series between the output terminal of the main branch of the dual power supply switching device and the neutral line.

[0009] Preferably, the high-voltage side of the operating transformer is connected to the mains power, while its low-voltage side supplies power to the entire control circuit.

[0010] Preferably, the stop buttons for both the main pump and the standby pump are normally closed contacts, connected in series in the control coil circuits of the main pump and the standby pump.

[0011] Preferably, the running indicator light is connected in series with the normally open auxiliary contact of the control and protection switch, and the fault indicator light is connected in series with the normally closed auxiliary contact.

[0012] Preferably, the backup branch of the dual power supply switching device is symmetrically arranged with the main pump circuit.

[0013] Preferably, the communication bus of the voltage and current monitoring component is an RS-485 bus, which uses the Modbus protocol to communicate with the fire control room.

[0014] This utility model has the following beneficial effects: 1. In this utility model, through the dual power supply switching device, control and protection switch, surge protector and backup protector and other structures, the main spray pressure stabilizing pump is reliably started and stopped, automatically and manually switched, and the operation and fault status feedback, parameter monitoring, surge protection and strong and weak current isolation functions are realized, so as to ensure the stable, reliable and controllable operation of the main pump.

[0015] 2. In this utility model, a backup circuit symmetrical to the main circuit is constructed through the backup pump assembly, realizing automatic switching when the main pump fails, ensuring uninterrupted operation of the system, and improving the overall reliability of the fire pressure stabilizing pump. Attached Figure Description

[0016] Figure 1 This utility model provides a circuit diagram of a fire-fighting dual-power stabilizing pump control circuit for a distribution box. Figure 2 This utility model presents a circuit diagram of a fire-fighting dual-power stabilizing pump control circuit for a distribution box. Detailed Implementation

[0017] The technical solutions of the embodiments 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.

[0018] Reference Figure 1 and Figure 2 This utility model provides an embodiment of a fire-fighting dual-power stabilizing pump control circuit for a distribution box, including a dual-power switching device, an operating transformer, a voltage and current monitoring component, a surge protector, and a backup protector. The main branch output of the dual-power switching device is first connected in series with the main pump circuit breaker, and then electrically connected to the main sprinkler system stabilizing pump via a cable. The output of the operating transformer is electrically connected to a changeover switch via a fuse. One path of the changeover switch is connected in series with the main pump start button and stop button, and then electrically connected to the coil of the main pump control and protection switch. The other path of the changeover switch is connected in series with a time relay and an intermediate relay, and then connected to the coil. The auxiliary contacts of the coil are connected in series with the running indicator light and the fault indicator light, respectively, and the other ends of the two indicator lights are electrically connected to the neutral terminal of the operating transformer. The voltage acquisition interface of the voltage and current monitoring component is connected in parallel to the power supply path of the main pump, and the current acquisition interface is connected in series to the power supply path of the main pump. The voltage and current monitoring component is electrically connected to the fire control room via a communication bus. A backup pump component is provided at the backup branch output of the dual-power switching device. Specifically, the main branch output of the dual power supply switching device is first connected in series with the main pump circuit breaker, and then electrically connected to the main sprinkler system's pressure-stabilizing pump via a cable. The main pump circuit breaker can quickly cut off the power path when the main pump experiences overload, short circuit, or other abnormalities, preventing damage to the pump motor due to continuous abnormal power supply and ensuring the safe and stable power supply to the main sprinkler system's pressure-stabilizing pump. The output of the operating transformer is connected to a changeover switch via a fuse. The fuse protects against short circuit faults in the control circuit, preventing the fault from affecting other control components. One path of the changeover switch is connected in series with the main pump start and stop buttons and then to the coil of the main pump control and protection switch. Emergency start and stop of the main pump can be achieved by manually operating the start and stop buttons, meeting the needs of manual intervention in emergencies. The other path of the changeover switch is connected in series with a time relay and an intermediate relay and then to the coil. By leveraging the delay of the time relay and the signal linkage of the intermediate relay, the main pump can be automatically inspected at regular intervals or triggered based on system pressure signals. The automatic start / stop function reduces labor costs and enhances the intelligence of system operation. The auxiliary contacts of the main pump control and protection switch coil are connected in series with the running indicator and fault indicator, respectively, and the other end of both indicator lights is electrically connected to the neutral terminal of the operating transformer. The on / off status of the main pump can be intuitively fed back by the indicator lights, allowing for quick judgment of the operating condition without disassembling the equipment and shortening the troubleshooting time. The voltage acquisition interface of the voltage and current monitoring component is connected in parallel to the power supply path of the main pump, and the current acquisition interface is connected in series to the power supply path of the main pump. It can accurately capture the voltage and current changes during the operation of the main pump. The voltage and current monitoring component is electrically connected to the fire control room through the communication bus, which can transmit the collected electrical parameters to the fire control room in real time, realizing remote monitoring and data traceability of the main pump's operating status. This facilitates the early identification of faults such as motor overload and voltage instability, avoiding interruption of the sprinkler system's voltage stabilization due to sudden equipment failure, and ensuring the reliable operation of the fire stabilization system.

[0019] Reference Figure 1 and Figure 2The standby pump assembly includes a standby pump circuit breaker and the main contacts of a standby pump control and protection switch. The main contacts of the standby pump circuit breaker and the standby pump control and protection switch are connected in series in the standby branch output terminal of the dual power supply switching device, and are electrically connected to the standby fire hydrant system voltage stabilizing pump via a cable. The output terminal of the operating transformer is connected to the standby pump control position of the changeover switch via the fuse of the standby control circuit. The output terminal of the standby pump control position is divided into two paths. One path is connected in series with the standby pump start button and the standby pump stop button and then connected to the coil of the standby pump control and protection switch. The other path is connected in series with the normally open contact of the intermediate relay and then connected to the coil of the standby pump control and protection switch. The coil of the intermediate relay is electrically connected to the fault auxiliary contact of the main pump control and protection switch. The auxiliary contacts of the standby pump control and protection switch are connected in series with the standby pump running indicator and the standby pump fault indicator, respectively. The other end of the standby pump running indicator and the standby pump fault indicator are both electrically connected to the neutral terminal of the operating transformer. Specifically, the components of the standby pump assembly are connected in series at the output of the standby branch of the dual power supply switching device, and electrically connected to the standby fire hydrant system pressure-stabilizing pump via cable, forming an independent and complete standby power path. This ensures that the standby pump can quickly connect and guarantee continuous pressure stabilization of the fire water supply system in the event of a main system malfunction. The output of the operating transformer is connected to the standby pump control position of the transfer switch via a standby control circuit fuse. The fuse provides independent short-circuit protection for the standby control circuit, preventing mutual interference with the main control circuit and increasing the safety and stability of the control section. The output of the standby pump control position is divided into two paths. One path is connected in series with the standby pump start button and the standby pump stop button, and then connected to the coil of the standby pump control and protection switch. This manual control path provides operators with the option to directly control the standby pump. One approach involves connecting the intermediate relay's normally open contact in series with the coil of the standby pump control and protection switch. The intermediate relay's coil is electrically connected to the main pump control and protection switch's fault auxiliary contact. This uses the main pump's fault status as the automatic start-up trigger signal for the standby pump, enabling rapid switching from fault detection to standby activation, shortening system recovery time, and improving overall reliability. The standby pump control and protection switch's auxiliary contacts are connected in series with the standby pump's running indicator and fault indicator, respectively. The other end of both the standby pump's running indicator and fault indicator is electrically connected to the neutral terminal of the operating transformer. The indicator lights make the real-time operating status or fault of the standby pump readily apparent, facilitating identification and response by staff, reducing maintenance difficulty, and improving the overall reliability of the fire-fighting pressure-stabilizing pump.

[0020] Reference Figure 1 and Figure 2 The surge protector and backup protector are connected in series between the output terminal of the main branch of the dual power supply switching device and the neutral line.

[0021] Specifically, this connection method can accurately respond to instantaneous overvoltages and surge currents. When the main branch experiences voltage surges beyond the normal range due to external interference, the surge protector can respond quickly and reduce its internal resistance to prevent high voltage from impacting core components. Furthermore, the backup protector and the surge protector form a collaborative protection system, which can monitor the working status of the surge protector in real time, ensuring uninterrupted power supply to the main pump and guaranteeing the power supply safety and operational reliability of the fire-fighting voltage stabilization circuit.

[0022] Reference Figure 1 and Figure 2 The high-voltage side of the operating transformer is connected to the mains power, while its low-voltage side supplies power to the entire control circuit.

[0023] Specifically, it achieves electrical isolation between high and low voltage control systems, effectively preventing high-voltage dangerous potentials from entering the control circuit and improving the safety of equipment maintenance and operation.

[0024] Reference Figure 1 and Figure 2 The stop buttons for both the main pump and the standby pump are normally closed contacts, connected in series in the control coil circuits of the main pump and the standby pump.

[0025] Specifically, the normally closed contact of the stop button remains in a conductive state under normal conditions, ensuring that the current can flow smoothly through the coil to drive the pump body to start when the start button is triggered. When it is necessary to stop the pump, pressing the stop button will open the normally closed contact, directly cutting off the power supply circuit of the control coil and causing the coil to quickly lose power to stop the pump from running.

[0026] Reference Figure 1 and Figure 2 The running indicator light is connected in series with the normally open auxiliary contact of the control and protection switch, and the fault indicator light is connected in series with the normally closed auxiliary contact.

[0027] Specifically, by utilizing the synchronous changes in the state of the internal auxiliary contacts when the control and protection switches are activated, direct control of pump operation and fault status is achieved, avoiding false alarms and missed alarms.

[0028] Reference Figure 1 and Figure 2 The backup branch of the dual power supply switching device is symmetrically set with the main pump circuit.

[0029] Specifically, in terms of functionality, the backup branch is guaranteed to have the same load-carrying capacity and response characteristics as the main circuit, ensuring that the backup pump can seamlessly switch and maintain the original operating parameters and pressure output of the system at the moment of main-to-backup switching.

[0030] Reference Figure 1 and Figure 2 The voltage and current monitoring component uses an RS-485 bus for communication and adopts the Modbus protocol to communicate with the fire control room.

[0031] Specifically, by utilizing the differential signal transmission characteristics of the RS-485 bus, it possesses strong anti-electromagnetic interference capabilities and a long transmission distance, enabling stable and accurate transmission of real-time monitoring data in the complex electromagnetic environment of the distribution box, ensuring the reliability of remote monitoring. The adoption of the standardized Modbus protocol ensures good compatibility and interoperability between monitoring components from different manufacturers and the fire control room system, thereby improving the operating efficiency of the fire stabilization system.

[0032] Working Principle: The dual power supply switching device uses the main branch as the core power source, supplying power to the main sprinkler system's voltage-stabilized pump via the main pump circuit breaker and cable, ensuring stable power output. The operating transformer connects to the mains power on the high-voltage side and supplies power to the control circuit on the low-voltage side to achieve strong and weak current isolation. Combined with series-connected fuses, this forms short-circuit protection for the control circuit. Simultaneously, surge protectors and backup protectors are connected in parallel between the main branch output and the neutral line, effectively suppressing instantaneous overvoltages and preventing damage to main circuit components. The changeover switch in the control logic can switch between manual and automatic modes. In manual mode, the normally closed stop button connected in series prioritizes emergency cut-off safety. Pressing the start button triggers the main pump control and protection switch. When the coil is energized, it drives the pump to run. In automatic mode, the time relay and intermediate relay are linked to realize timed inspection or pressure linkage control without manual intervention. The normally open and normally closed auxiliary contacts of the control and protection switches are connected in series with the operation / fault indicator lights to provide real-time feedback on the status of the main pump. The voltage and current monitoring components acquire electrical parameters through parallel voltage acquisition interfaces and series current acquisition interfaces, and transmit them to the fire control room via the communication bus to realize remote monitoring of the operating status of the main pump. The dual power supply switching device's backup branch and the main pump circuit are symmetrically set to provide a structural basis for subsequent redundancy backup. Overall, it ensures that the main sprinkler system's pressure-stabilizing pump can operate stably and safely under various working conditions. The backup branch of the dual power supply switching device provides a power path for the backup fire hydrant system's pressure-stabilizing pump. The backup pump circuit breaker and the main contacts of the backup pump control and protection switch are connected in series to form the core of the backup pump's power control. In the control circuit, the output of the operating transformer is connected to the backup pump control position of the transfer switch via the backup control circuit fuse. In manual mode, the backup pump control and protection switch coil can be energized or de-energized directly through the backup pump start / stop button to achieve manual start / stop of the backup pump. In automatic mode, the intermediate relay coil is linked to the fault auxiliary contact of the main pump control and protection switch. When the main pump fails, causing the control and protection switch to trigger the fault contact, the intermediate relay coil is energized, its normally open contact closes, and the backup pump control and protection switch coil is automatically started, driving the backup pump into operation. The main / backup switch can be switched without manual intervention. At the same time, the auxiliary contacts of the backup pump control and protection switch are connected in series with the backup pump operation / fault indicator lights to provide real-time feedback on the backup pump status, ensuring that personnel can grasp the operating status of the backup system and improving the reliability and emergency response capability of the entire circuit.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fire-fighting dual-power stabilizing pump control circuit for a distribution box, comprising a dual-power switching device, an operating transformer, a voltage and current monitoring component, a surge protector, and a backup protector, characterized in that: The main branch output of the dual power supply switching device is first connected in series with the main pump circuit breaker, and then electrically connected to the main sprinkler system pressure stabilizing pump via a cable. The output of the operating transformer is electrically connected to a changeover switch via a fuse. One path of the changeover switch is connected in series with the main pump start button and stop button, and then electrically connected to the coil of the main pump control and protection switch. The other path of the changeover switch is connected in series with a time relay and an intermediate relay, and then connected to the coil. The auxiliary contacts of the coil are connected in series with the running indicator light and the fault indicator light, respectively, and the other ends of the two indicator lights are electrically connected to the neutral terminal of the operating transformer. The voltage acquisition interface of the voltage and current monitoring component is connected in parallel to the power supply path of the main pump, and the current acquisition interface is connected in series to the power supply path of the main pump. The voltage and current monitoring component is electrically connected to the fire control room via a communication bus. The backup branch output of the dual power supply switching device is equipped with a backup pump component.

2. The fire-fighting dual-power stabilizing pump control circuit for a distribution box according to claim 1, characterized in that: The standby pump assembly includes a standby pump circuit breaker and the main contacts of a standby pump control and protection switch. The main contacts of the standby pump circuit breaker and the standby pump control and protection switch are connected in series in the standby branch output terminal of the dual power supply switching device, and are electrically connected to the standby fire hydrant system voltage stabilizing pump via a cable. The output terminal of the operating transformer is connected to the standby pump control position of the transfer switch via a fuse in the standby control circuit. The output terminal of the standby pump control position is divided into two paths. One path is connected in series with the standby pump start button and the standby pump stop button and then connected to the coil of the standby pump control and protection switch. The other path is connected in series with the normally open contact of the intermediate relay and then connected to the coil of the standby pump control and protection switch. The coil of the intermediate relay is electrically connected to the fault auxiliary contact of the main pump control and protection switch. The auxiliary contacts of the standby pump control and protection switch are connected in series with the standby pump running indicator light and the standby pump fault indicator light, respectively. The other end of the standby pump running indicator light and the standby pump fault indicator light are both electrically connected to the neutral terminal of the operating transformer.

3. The fire-fighting dual-power stabilizing pump control circuit of a distribution box according to claim 1, characterized in that: The surge protector and backup protector are connected in series between the output terminal of the main branch of the dual power supply switching device and the neutral line.

4. The fire-fighting dual-power stabilizing pump control circuit for a distribution box according to claim 1, characterized in that: The high-voltage side of the operating transformer is connected to the mains power, while its low-voltage side supplies power to the entire control circuit.

5. The fire-fighting dual-power stabilizing pump control circuit for a distribution box according to claim 1, characterized in that: The stop buttons for both the main pump and the standby pump are normally closed contacts, connected in series in the control coil circuits of the main pump and the standby pump.

6. The fire-fighting dual-power stabilizing pump control circuit for a distribution box according to claim 1, characterized in that: The running indicator light is connected in series with the normally open auxiliary contact of the control and protection switch, and the fault indicator light is connected in series with the normally closed auxiliary contact.

7. The fire-fighting dual-power stabilizing pump control circuit for a distribution box according to claim 1, characterized in that: The backup branch of the dual power supply switching device is symmetrically arranged with the main pump circuit.

8. The fire-fighting dual-power stabilizing pump control circuit of a distribution box according to claim 1, characterized in that: The voltage and current monitoring component uses an RS-485 bus for communication and adopts the Modbus protocol to communicate with the fire control room.

Images