A fire pump station monitoring system
Patent Information
- Application Number
- CN202522524376.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-27
AI Technical Summary
由于消防泵站中引水灌进气或则其他设备原因，导致出水流量降低，等到加热炉发现汽包水位低于报警值的时候才去处理消防泵站中的设备，极容易导致炉膛管缺水损坏炉膛管，后果不堪设想
1）可以上位机、消防泵站PLC、交换机、光电耦合器实现消防泵站设备的远程监控；
Smart Images
Figure CN224922203U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire pump station technology, and in particular to a fire pump station monitoring system. Background Technology
[0002] In the steel rolling production line, the fire pump station supplies water to the resin tank of the heating furnace, converting hard water into soft water. The converted water is then stored in the tank to replenish the furnace tubes and steam drum water levels, playing a crucial role in the furnace's circulating cooling. If the water flow rate decreases due to air intake in the fire pump station or other equipment malfunctions, and the equipment in the fire pump station is only addressed when the heating furnace detects that the steam drum water level is below the alarm threshold, the furnace tubes are highly susceptible to water shortage and damage, with potentially disastrous consequences. Utility Model Content
[0003] This utility model provides a fire pump station monitoring system that enables the monitoring of three parameters on a host computer: the water level in the fire pump station's water tank, the pressure of the main pipe supplying water to production, and the flow rate of water used on-site. It can identify equipment malfunctions in the fire pump station in the first instance and address water supply flow issues before the water level falls below the alarm value, ensuring the safety of the heating furnace equipment.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: A fire pump station monitoring system includes a host computer, a fire pump station PLC, a switch, an optocoupler, a frequency converter a, fire pump station equipment, and a control loop a. The fire pump station PLC is connected to the optocoupler via a network cable, the optocoupler is connected to the switch via an optical fiber, and the switch is connected to the host computer via a network cable. The fire pump station PLC, the frequency converter a, and the control loop a are electrically connected. The fire pump station equipment includes a fire water tank, outlet pipe a, outlet main pipe, radar level gauge, pressure transmitter, electromagnetic flow meter, solenoid valve, and water pump a. The radar level gauge is installed above the fire water tank to detect the water level. The inlet end of outlet pipe a is connected to the fire water tank, and the outlet end of outlet pipe a is connected to the outlet main pipe. An electromagnetic flow meter and a solenoid valve are installed on the outlet main pipe. An electromagnetic valve is installed at both the inlet and outlet ends of outlet pipe a. A water pump a is installed between the two solenoid valves. An electromagnetic flow meter and a pressure transmitter are installed sequentially on outlet pipe a between water pump a and the solenoid valve at the outlet end. The radar level gauge, pressure transmitter, and electromagnetic flowmeter are connected to the analog input terminal of the fire pump station PLC. The solenoid valve is connected to the digital output terminal of the fire pump station PLC. The water pump a is connected to the three-phase output terminal of the frequency converter a.
[0005] Furthermore, the fire pump station PLC includes a power supply module, a CPU module, an analog input module, a digital input module, and a digital output module. The power supply module supplies power to the CPU module. The input terminals of the analog input module are connected to the radar level gauge, pressure transmitter, and electromagnetic flow meter. The input terminals of the digital input module are connected to the output signal terminal of the frequency converter a. The output terminals of the digital output module are connected to the solenoid valve signal line.
[0006] Furthermore, the control circuit a includes a three-position selector switch, a local control box, a control cabinet, a start button SB1, a stop button SB2, a start button SB3, a stop button SB4, relays KA1, KA2, KA3, KA4, KA6-1, KA6-2, and indicator lights. The fire pump station PLC is installed inside the control cabinet, the start button SB1 and the stop button SB2 are installed on the outer door panel of the control cabinet, and the start button SB3 and the stop button SB4 are installed on the local control box. The coils of relays KA6-1 and KA6-2 are connected to the first two output terminals of the digital output module, which are used to remotely start and stop inverter a, respectively. The normally open contact of relay KA6-1 is connected in series with the remote contact terminal of the three-position selector switch. The remote contact terminal of the three-position selector switch is connected in series with the coil of relay KA1, the normally closed contact of relay KA2, and the normally closed contact of relay KA4. The normally open contact of relay KA1 is connected to the start / stop input terminal of inverter a. The zero-position contact output terminal of the three-position selector switch is connected to the start button SB1 and the stop button SB2. The start button SB3 is connected in series with the machine-side contact of the three-position selector switch. The connection circuit between the normally open contact of the relay KA6-1 and the remote contact of the three-position selector switch is connected in parallel with the connection circuit between the zero-position contact of the three-position selector switch and the start button SB1, the series circuit between the start button SB3 and the machine-side contact of the three-position selector switch, and the normally open contact of the relay KA1. The normally open contact of relay KA6-2 is connected in series with the remote contact of the three-position selector switch. The output of stop button SB2 is connected to the coil of relay KA2. The series circuit of relay KA6-2 and the remote contact of the three-position selector switch is connected in parallel with stop button SB4 and then connected to the coil of relay KA2. The coil of relay KA3 is connected to the running output terminal of inverter a, and the coil of relay KA4 is connected to the fault output terminal of inverter a. The indicator lights include a machine-side operation indicator light, a frequency converter a indicator light, and a frequency converter a fault indicator light. The machine-side operation indicator light and the frequency converter a indicator light are connected in parallel with the coil of relay KA3, and the frequency converter a fault indicator light is connected in parallel with relay KA4.
[0007] Furthermore, it also includes outlet pipe b, water pump b, frequency converter b and control circuit b. The control circuit b has the same connection structure as control circuit a. The control circuit b is electrically connected to frequency converter b and fire pump PLC. The three-phase output terminal of frequency converter b is connected to water pump b. The inlet end of the outlet pipe b is connected to the fire water tank, and the outlet end of the outlet pipe b is connected to the outlet end of the outlet pipe a and the main outlet pipe. Each of the inlet and outlet ends of the outlet pipe b is equipped with a solenoid valve. A water pump b is installed between the two solenoid valves. An electromagnetic flow meter and a pressure transmitter are installed sequentially on the outlet pipe b between the water pump b and the solenoid valve at the outlet end. The electromagnetic flow meter and pressure transmitter on the outlet pipe b are connected to the analog input terminal of the fire pump station PLC. The solenoid valve on the outlet pipe b is connected to the digital output terminal of the fire pump station PLC. The water pump b is connected to the three-phase output terminal of the frequency converter b.
[0008] Compared with the prior art, the beneficial effects of this utility model are: 1) Remote monitoring of fire pump station equipment can be achieved through host computer, fire pump station PLC, switch, and optocoupler; 2) The water level of the fire water tank is monitored in real time by radar level gauge, and the water output of the pipeline and the operation of the water pump are monitored in real time by pressure transmitter and electromagnetic flow meter, so as to promptly alarm the level and equipment failure. 3. By connecting the control loop and the PLC of the fire pump station, the fire pump can be controlled both locally and remotely. The inverter can also be stopped in time from the local control box, and on-site equipment failures can be handled in a timely manner. It not only uses the inverter to realize the soft start and stop and frequency adjustment of the water pump, but more importantly, it constructs a multi-level, self-locking control loop, which tightly connects the inverter, radar level gauge, pressure transmitter, fire alarm system and the upper computer remote monitoring, thereby realizing comprehensive perception, automatic control, real-time early warning and remote operation and maintenance of the fire pump's working status. Attached Figure Description
[0009] Figure 1 This is a structural schematic diagram of the fire pump station equipment described in this utility model.
[0010] Figure 2 This is a wiring diagram of the water pump a frequency converter described in this utility model.
[0011] Figure 3 This is a wiring diagram of the control circuit a described in this utility model.
[0012] Figure 4 This is a wiring diagram of the water pump b frequency converter described in this utility model.
[0013] Figure 5 This is a wiring diagram of the control circuit b described in this utility model.
[0014] Figure 6 This is a wiring diagram of the digital input module described in this utility model.
[0015] Figure 7 This is a wiring diagram of the digital output module described in this utility model.
[0016] In the diagram: 1. Fire water tank; 2. Outlet pipe a; 3. Outlet pipe b; 4. Outlet main pipe; 5. Radar level gauge; 6. Pressure transmitter; 7. Electromagnetic flow meter; 8. Solenoid valve; 9. Water pump a; 10. Water pump b. Detailed Implementation
[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings: This utility model discloses a fire pump station monitoring system, including a host computer, a fire pump station PLC, a switch, an optocoupler, a frequency converter a, fire pump station equipment, and a control circuit a. The fire pump station PLC is connected to the optocoupler via a network cable, the optocoupler is connected to the switch via an optical fiber, and the switch is connected to the host computer via a network cable.
[0018] See Figure 1 This is a structural schematic diagram of the fire pump station equipment described in this utility model. The fire pump station equipment includes a fire water tank 1, outlet pipe a2, outlet pipe b3, outlet main pipe 4, radar level gauge 5, pressure transmitter 6, electromagnetic flowmeter 7, solenoid valve 8, water pump a9, and water pump b10. The radar level gauge 5 is positioned above the fire water tank 1 to detect the water level. The inlet ends of outlet pipe a2 and outlet pipe b are both connected to the fire water tank 1, and the outlet ends of outlet pipe a2 and outlet pipe b are connected to the outlet main pipe 4. An electromagnetic flowmeter is installed on the outlet main pipe. The outlet pipe a2 is equipped with an inlet and an outlet solenoid valve 8. A water pump a9 is located between the two solenoid valves 8. An electromagnetic flow meter 7 and a pressure transmitter 6 are sequentially installed on the outlet pipe a2 between the water pump a9 and the outlet solenoid valve 8. The outlet pipe b3 is equipped with an inlet and an outlet solenoid valve 8. A water pump b10 is located between the two solenoid valves 8. An electromagnetic flow meter 7 and a pressure transmitter 6 are sequentially installed on the outlet pipe b3 between the water pump b10 and the outlet solenoid valve 8.
[0019] See Figure 2-3The control circuit a includes a three-position selector switch, a local control box, a control cabinet, a start button SB1, a stop button SB2, a start button SB3, a stop button SB4, relays KA1, KA2, KA3, KA4, KA6-1, KA6-2, and indicator lights. The fire pump station PLC is installed inside the control cabinet. The start button SB1 and the stop button SB2 are installed on the outer door panel of the control cabinet, and the start button SB3 and the stop button SB4 are installed on the local control box. The coils of relays KA6-1 and KA6-2 are connected to the first two output terminals of the digital output module, which are used to remotely start and stop inverter a, respectively. The normally open contact of relay KA6-1 is connected in series with the remote contact terminal of the three-position selector switch. The remote contact terminal of the three-position selector switch is connected in series with the coil of relay KA1, the normally closed contact of relay KA2, and the normally closed contact of relay KA4. The normally open contact of relay KA1 is connected to the start / stop input terminal of inverter a. The zero-position contact output terminal of the three-position selector switch is connected to the start button SB1 and the stop button SB2. The start button SB3 is connected in series with the machine-side contact of the three-position selector switch. The connection circuit between the normally open contact of the relay KA6-1 and the remote contact of the three-position selector switch is connected in parallel with the connection circuit between the zero-position contact of the three-position selector switch and the start button SB1, the series circuit between the start button SB3 and the machine-side contact of the three-position selector switch, and the normally open contact of the relay KA1. The normally open contact of relay KA6-2 is connected in series with the remote contact of the three-position selector switch. The output of stop button SB2 is connected to the coil of relay KA2. The series circuit of relay KA6-2 and the remote contact of the three-position selector switch is connected in parallel with stop button SB4 and then connected to the coil of relay KA2. The coil of relay KA3 is connected to the running output terminals T / A2 and T / C2 of inverter a, and the coil of relay KA4 is connected to the fault output terminals T / A1 and T / C1 of inverter a. The indicator lights include a machine-side operation indicator light, a frequency converter a indicator light, and a frequency converter a fault indicator light. The machine-side operation indicator light and the frequency converter a indicator light are connected in parallel with the coil of relay KA3, and the frequency converter a fault indicator light is connected in parallel with relay KA4. The three-phase power input terminal of the frequency converter a is connected to a three-phase power supply, and the three-phase output terminal is connected to the water pump a9. The three analog input channels of the frequency converter are connected to the adjustment knob for frequency setting adjustment.
[0020] See Figure 4-5 The connection structure of frequency converter b, water pump b10, and control circuit b is exactly the same. The fire pump station PLC includes a power supply module, a CPU module, an analog input module, a digital input module, and a digital output module. The power supply module supplies power to the CPU module. The input terminals of the analog input module are connected to the radar level gauge 5, the pressure transmitter 6, and the electromagnetic flowmeter 7. (See attached diagram.) Figure 6-7 The input terminal I0.0 of the digital input module is connected to the normally open contact of relay KA3 to input the operating signal of inverter a to the fire pump station PLC. The input terminal I0.1 of the digital input module is connected to the normally open contact of relay KA4 to input the fault signal of inverter a to the fire pump station PLC. The input terminal I0.3 of the digital input module is connected to the normally open contact of relay KA3-2 to input the operating signal of inverter b to the fire pump station PLC. The input terminal I0.3 of the digital input module is connected to the normally open contact of relay KA4-2. Point 1 is used to input the fault signal of inverter b into the fire pump station PLC. The output terminals Q0.0-Q0.7 of the digital output module are respectively connected to the coils of relays KA6-1, KA6-2, KA7-1, KA7-2, KA6-3, KA6-4, KA7-3, and KA7-4. The output terminal Q1.0 of the digital output module is connected to the coil of relay KA8. The normally open contacts of relays KA6-3, KA6-4, KA7-3, KA7-4, and KA8 are respectively connected to each solenoid valve 8 to control the opening and closing of each solenoid valve 8.
[0021] Working principle: When the three-position selector switch in control circuit a is set to zero, pressing the start button SB1 on the control cabinet energizes the coil of relay KA1, closes the normally open contact of relay KA1, achieving self-locking of the relay coil KA1. The relay coil KA1 remains energized, and the inverter is started at the control cabinet. To stop the inverter, press the stop button SB2, energize the relay coil KA2, open the normally closed contact of relay KA2, de-energize the relay coil KA1, and stop the inverter at the control cabinet.
[0022] When the three-position selector switch in control circuit a is set to local operation, pressing the start button SB3 on the local operation box energizes and latches relay KA1, enabling the local operation box to start the inverter. Pressing the stop button SB4 on the local operation box energizes the coil of relay KA2, opens the normally closed contact of relay KA2, and de-energizes the coil of relay KA1, thus stopping the inverter at the local operation box.
[0023] When the remote start option is selected on the three-position selector switch in control loop b, a start signal is input to the host computer, the fire pump station PLC outputs a control signal, the coil of relay KA6-1 is energized, the normally open contact of relay KA6-1 closes, and relay KA1 is also self-locked and energized, realizing the remote start of the fire pump station. When a stop signal is input to the host computer, the fire pump station PLC outputs a control signal, the coil of relay KA6-2 is energized, the normally open contact of relay KA6-2 closes, the coil of relay KA2 is energized, and the normally closed contact of relay KA2 opens, realizing the remote stop of the fire pump station.
[0024] When the radar level gauge 5 detects that the water level in the fire water tank 1 is lower than the preset level, the digital output module sends an alarm signal through the buzzer. When the real-time parameters monitored by the pressure transmitter 6 and the electromagnetic flowmeter 7 are lower than the preset parameters, they also send a control command to the buzzer through the digital output module, and the buzzer sends an alarm signal. When the parameters of the pressure transmitter 6 and the electromagnetic flowmeter 7 are fed back to the host computer, their values are monitored at the host computer, providing the on-site operators with a basis for frequency adjustment of the frequency converter.
[0025] The above embodiments are implemented based on the technical solution of this utility model, providing detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the above embodiments. Unless otherwise specified, the methods used in the above embodiments are conventional methods.
Claims
1. A fire pump station monitoring system, characterized in that, The system includes a host computer, a fire pump station PLC, a switch, an optocoupler, a frequency converter a, fire pump station equipment, and a control circuit a. The fire pump station PLC is connected to the optocoupler via a network cable, the optocoupler is connected to the switch via an optical fiber, and the switch is connected to the host computer via a network cable. The fire pump station PLC, frequency converter a, and control circuit a are electrically connected to each other. The fire pump station equipment includes a fire water tank, outlet pipe a, outlet main pipe, radar level gauge, pressure transmitter, electromagnetic flow meter, solenoid valve, and water pump a. The radar level gauge is installed above the fire water tank to detect the water level. The inlet end of outlet pipe a is connected to the fire water tank, and the outlet end of outlet pipe a is connected to the outlet main pipe. An electromagnetic flow meter and a solenoid valve are installed on the outlet main pipe. An electromagnetic valve is installed at both the inlet and outlet ends of outlet pipe a. A water pump a is installed between the two solenoid valves. An electromagnetic flow meter and a pressure transmitter are installed sequentially on outlet pipe a between water pump a and the solenoid valve at the outlet end. The radar level gauge, pressure transmitter, and electromagnetic flowmeter are connected to the analog input terminal of the fire pump station PLC. The solenoid valve is connected to the digital output terminal of the fire pump station PLC. The water pump a is connected to the three-phase output terminal of the frequency converter a.
2. The fire pump station monitoring system according to claim 1, characterized in that, The fire pump station PLC includes a power supply module, a CPU module, an analog input module, a digital input module, and a digital output module. The power supply module supplies power to the CPU module. The input terminals of the analog input module are connected to the radar level gauge, pressure transmitter, and electromagnetic flow meter. The input terminals of the digital input module are connected to the output signal terminal of the frequency converter a. The output terminals of the digital output module are connected to the solenoid valve signal line.
3. A fire pump station monitoring system according to claim 2, characterized in that, The control circuit a includes a three-position selector switch, a local control box, a control cabinet, a start button SB1, a stop button SB2, a start button SB3, a stop button SB4, relays KA1, KA2, KA3, KA4, KA6-1, KA6-2, and indicator lights. The fire pump station PLC is installed inside the control cabinet. The start button SB1 and stop button SB2 are installed on the outer door panel of the control cabinet, and the start button SB3 and stop button SB4 are installed on the local control box. The coils of relays KA6-1 and KA6-2 are connected to the first two output terminals of the digital output module, which are used to remotely start and stop inverter a, respectively. The normally open contact of relay KA6-1 is connected in series with the remote contact terminal of the three-position selector switch. The remote contact terminal of the three-position selector switch is connected in series with the coil of relay KA1, the normally closed contact of relay KA2, and the normally closed contact of relay KA4. The normally open contact of relay KA1 is connected to the start / stop input terminal of inverter a. The zero-position contact output terminal of the three-position selector switch is connected to the start button SB1 and the stop button SB2. The start button SB3 is connected in series with the machine-side contact of the three-position selector switch. The connection circuit between the normally open contact of the relay KA6-1 and the remote contact of the three-position selector switch is connected in parallel with the connection circuit between the zero-position contact of the three-position selector switch and the start button SB1, the series circuit between the start button SB3 and the machine-side contact of the three-position selector switch, and the normally open contact of the relay KA1. The normally open contact of relay KA6-2 is connected in series with the remote contact of the three-position selector switch. The output of stop button SB2 is connected to the coil of relay KA2. The series circuit of relay KA6-2 and the remote contact of the three-position selector switch is connected in parallel with stop button SB4 and then connected to the coil of relay KA2. The coil of relay KA3 is connected to the running output terminal of inverter a, and the coil of relay KA4 is connected to the fault output terminal of inverter a. The indicator lights include a machine-side operation indicator light, a frequency converter a indicator light, and a frequency converter a fault indicator light. The machine-side operation indicator light and the frequency converter a indicator light are connected in parallel with the coil of relay KA3, and the frequency converter a fault indicator light is connected in parallel with relay KA4.
4. A fire pump station monitoring system according to claim 3, characterized in that, It also includes outlet pipeline b, water pump b, frequency converter b and control circuit b. The connection structure of control circuit b is the same as that of control circuit a. Control circuit b is electrically connected to frequency converter b and fire pump PLC. The three-phase output terminal of frequency converter b is connected to water pump b. The inlet end of outlet pipe b is connected to the fire water tank, and the outlet end of outlet pipe b is connected to the outlet end of outlet pipe a and the main outlet pipe. Each of the inlet and outlet ends of outlet pipe b is equipped with a solenoid valve. A water pump b is installed between the two solenoid valves. An electromagnetic flow meter and a pressure transmitter are installed sequentially on outlet pipe b between water pump b and the solenoid valve at the outlet end. The electromagnetic flow meter and pressure transmitter on outlet pipe b are connected to the analog input terminal of the fire pump station PLC. The solenoid valve on outlet pipe b is connected to the digital output terminal of the fire pump station PLC. Water pump b is connected to the three-phase output terminal of frequency converter b.