Novel diesel engine fire pump set control system

Abstract

The utility model relates to the field of fire fighting equipment, in particular to a novel diesel fire pump set control system. The device comprises a diesel engine pump control cabinet, a diesel engine instrument box, an emergency starting device, a sensor, a starting motor, a generator, a storage battery and a water jacket heater. The diesel engine instrument box collects sensor data, displays and transmits the data to the control cabinet, and can independently control starting and stopping of the diesel engine. The control cabinet receives remote transmission signals or starts the diesel engine through manual operation in an automatic or manual mode, and operation data can be displayed in real time. According to the system, through the double-control design, a reliable starting, stopping and monitoring system is additionally arranged for the diesel engine fire pump set, and the reliability and the safety are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment, specifically to a novel diesel fire pump control system. Background Technology

[0002] In modern fire protection systems, diesel engine fire pump sets, with their advantages of not being limited by mains power supply and rapid start-up, have become key facilities for fire safety in high-rise buildings, large commercial complexes, petrochemical plants, and other locations. As building scale expands and fire safety requirements increase, the reliability and intelligence of diesel engine fire pump sets become increasingly important. Traditional diesel engine fire pump sets are mostly equipped with a single diesel engine fire pump control cabinet, which undertakes the core control functions of the system. When the electric fire pump malfunctions, the mains power fails, or the pipeline pressure falls below a set threshold, the control cabinet automatically starts the diesel engine fire pump according to preset logic and displays its operating status in real time. Simultaneously, based on collected data such as speed, oil pressure, oil temperature, and pipeline pressure, it automatically adjusts the diesel engine's operating conditions to ensure stable fire water supply. Under normal circumstances, this design can meet the basic operational needs of the fire protection system and achieve automated fire emergency response.

[0003] However, this design relying on a single control cabinet has significant drawbacks. As the core control hub of the system, if the control cabinet fails due to aging electrical components, software malfunctions, or external electromagnetic interference, the entire control system will be paralyzed. In this situation, only an emergency start device can be used to start the diesel engine. However, the emergency start device only has simple mechanical or manual forced start functions and cannot automatically monitor and control the diesel engine's operating status. It cannot obtain crucial information such as whether the diesel engine has started successfully, whether its speed is stable, and whether its oil pressure and temperature are normal. It also cannot dynamically adjust the diesel engine's operating conditions according to changes in pipeline pressure, and it lacks automatic protection against overload, overheating, and other abnormal conditions. This not only greatly reduces the reliability of the fire pump set but may also lead to equipment damage or even delays in fire rescue due to the diesel engine operating in abnormal conditions, posing serious safety hazards. From an industry standard perspective, GB50974-2014 "Technical Specification for Fire Water Supply and Fire Hydrant Systems" clearly requires that standby pumps have high reliability and automated operation capabilities. The situation where a single control cabinet failure leads to system malfunction clearly fails to meet the stringent requirements of the standard for the stability and safety of fire protection systems. Meanwhile, in practical applications, inspection data from fire departments in many places show that the proportion of cases where diesel fire pump sets cannot operate normally due to control cabinet failures is increasing year by year, further highlighting the urgency of improving existing technologies. Utility Model Content

[0004] To address the aforementioned issues and improve the reliability and intelligence of diesel engine fire pump control systems, it is urgent to explore more advanced, stable, and redundant control technologies to meet increasingly stringent fire safety requirements and industry standards. This invention proposes a novel diesel engine fire pump control system. This system, by adding a diesel engine instrument box and cooperating with the diesel engine pump control cabinet, forms a new control system capable of centralized control of the diesel engine. When the diesel engine fire pump control cabinet malfunctions, the diesel engine instrument box can be used to control and monitor the start and stop of the diesel engine.

[0005] The technical solution of this utility model is as follows:

[0006] A novel diesel engine fire pump control system includes a central controller, a diesel engine, a diesel engine pump control cabinet, and a diesel engine instrument box. The diesel engine pump control cabinet is electrically connected to the diesel engine. The diesel engine instrument box is mounted on the surface of the diesel engine and is electrically connected to the diesel engine. The diesel engine housing includes an oil temperature sensor, an oil pressure sensor, a water temperature sensor, a speed sensor, a starter motor, and a generator. All of these sensors are connected to the central controller. A water jacket heater is mounted on the common base of the diesel engine and is connected to the central controller. The diesel engine is electrically connected to two battery banks: a No. 1 battery bank and a No. 2 battery bank.

[0007] Preferably, the diesel engine pump control cabinet includes a programmable controller, an analog module, a relay, a touch screen, a switch, control buttons, indicator lights, a first control panel, and a sound unit. The analog module, relay, touch screen, switch, control buttons, and indicator lights are all connected to the programmable controller, which is connected to a central controller.

[0008] Preferably, the analog quantity module is connected to battery pack #1 and battery pack #2.

[0009] Preferably, the first control panel is connected to the central controller, and the first control panel is equipped with a three-position selector switch, a #1 start button, a #2 start button, a stop button, and a control power indicator light. The three-position selector switch on the control panel is a manual / stop / automatic three-position control switch.

[0010] Preferably, the diesel engine instrument box includes an instrument box controller, relays, buttons, indicator lights, and a control panel. The relays, second control buttons, indicator lights, and second control panel are all connected to the instrument box controller, and the instrument box controller is connected to the central controller.

[0011] Preferably, there are multiple second control buttons, including a #1 start button, a #2 start button, and a stop button.

[0012] Preferably, the second control panel of the diesel engine instrument box is connected to the central controller. The second control panel is equipped with a three-position selector switch, an overspeed test button, a stop reset button, an overspeed alarm indicator, and a common alarm indicator. The three-position selector switch of the second control panel is selected as manual / stop / automatic.

[0013] Preferably, the diesel engine pump control cabinet and the diesel engine instrument box are equipped with a DC24V control power interface.

[0014] Preferably, the novel diesel engine fire pump set control system is used for diesel engine-driven water supply and drainage equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a novel diesel engine fire pump control system according to this utility model.

[0016] Figure 2 This is a structural schematic diagram of a diesel engine pump control cabinet according to the present invention.

[0017] Figure 3 This is a structural schematic diagram of a diesel engine instrument box according to the present invention.

[0018] In the diagram: 1. Diesel engine; 2. Diesel engine pump control cabinet; 3. Diesel engine instrument box; 4. Battery pack #1; 5. Battery pack #2. Detailed Implementation

[0019] A novel diesel engine fire pump set control system is applicable to diesel engine-driven water supply and drainage equipment. It includes a central controller, a diesel engine 1, a diesel engine pump control cabinet 2, and a diesel engine instrument box 3. The diesel engine pump control cabinet 2 is electrically connected to the diesel engine 1, and the diesel engine instrument box 3 is mounted on the surface of the diesel engine 1 and is electrically connected to the diesel engine 1.

[0020] The diesel engine 1 is equipped with an oil temperature sensor, an oil pressure sensor, a water temperature sensor, a speed sensor, a starter motor, and a generator. All of these sensors are connected to the central controller.

[0021] A water jacket heater is installed on the common base of diesel engine 1, and the water jacket heater is connected to the central controller;

[0022] The diesel engine 1 is electrically connected to battery pack 4 (#1) and battery pack 5 (#2).

[0023] The diesel engine pump control cabinet includes a programmable logic controller (PLC), analog modules, relays, a touch screen, switches, control buttons, indicator lights, a first control panel, and a sound unit. The analog modules, relays, touch screen, switches, control buttons, and indicator lights are all connected to the PLC, which is connected to the central controller.

[0024] The analog signal module is connected to battery pack 4 (1) and battery pack 5 (2).

[0025] The first control panel is connected to the central controller. The first control panel is equipped with a three-position selector switch, a #1 start button, a #2 start button, a stop button, and a control power indicator. The three-position selector switch on the control panel is a manual / stop / automatic three-position control switch.

[0026] The diesel engine instrument box 3 includes an instrument box controller, relays, buttons, indicator lights, and a control panel. The relays, second control buttons, indicator lights, and second control panel are all connected to the instrument box controller, which is connected to the central controller.

[0027] The second control button consists of multiple buttons, including the #1 start button, the #2 start button, and the stop button.

[0028] The second control panel of the diesel engine instrument box 3 is connected to the central controller. The second control panel is equipped with a three-position selector switch, an overspeed test button, a stop reset button, an overspeed alarm indicator, and a common alarm indicator. The three-position selector switch of the second control panel is selected as manual / stop / automatic.

[0029] The diesel engine pump control cabinet and the diesel engine instrument box 3 are equipped with a DC24V control power interface.

[0030] The specific embodiments of this utility model are as follows:

[0031] The present invention relates to a novel diesel engine fire pump control system. Figure 1 This is a schematic diagram of the control system of the new diesel engine fire pump set.

[0032] Specifically, such as Figure 1 As shown, the control system of this new diesel engine fire pump set includes: a diesel engine pump control cabinet, a diesel engine instrument box, emergency start devices (C1#, C2#), sensors for oil temperature, oil pressure, water temperature, and speed installed on the diesel engine and connected to the control system, a starter motor M and a generator G installed on the diesel engine, and a storage battery.

[0033] The diesel engine pump control cabinet is independent and can be installed near the diesel engine pump set or in a remote control room; it is not limited by the installation location.

[0034] Sensors for oil temperature, oil pressure, water temperature, and speed, as well as the starter motor M and generator G, are installed on the diesel engine body.

[0035] The diesel engine instrument box is mounted on the diesel engine body or on a common base.

[0036] The first set of terminals is reserved in the diesel engine instrument box. It is connected to sensors such as oil temperature, oil pressure, water temperature, and speed, as well as the starter motor M and generator G, through a wiring harness for monitoring the diesel engine.

[0037] A second set of terminals is reserved in the diesel engine instrument box for connection to the battery and emergency start device (C1#, C2#) for charging, power supply and starting / stopping the diesel engine.

[0038] A third set of terminals is reserved in the diesel engine instrument box for connection to the diesel engine pump control cabinet, which facilitates the diesel engine pump control cabinet to monitor and control the status of the diesel engine pump set.

[0039] Furthermore, such as Figure 2 The structural diagram of the diesel engine pump control cabinet is shown.

[0040] The diesel engine pump control cabinet includes: a programmable controller ST30, an analog module AE04, a touch screen MCGS, relays KA1~KA8, an indicator light HG1, an electric bell DL, a changeover switch SA1, push-button switches SB1~SB3, and a terminal block.

[0041] In the diesel engine pump control cabinet, the MCGS displays data such as diesel engine oil pressure, oil temperature, water temperature, and speed, as well as battery voltage and current data, and the diesel engine's operating status, including running, standby, and alarm indicators for high oil temperature and high water temperature. The PLC is used for programming, reading the diesel engine status, issuing control commands, and sending alarm signals. The DL electric bell, mounted on the cabinet, emits an alarm sound. The analog module AE04 acquires battery voltage and current signals.

[0042] The diesel engine pump control cabinet panel is equipped with a selector switch SA1 for switching between "manual / stop / automatic" modes. The panel also includes buttons SB1 (start #1), SB2 (start #2), SB3 (stop), and indicator light HG1 (power control). When SA1 is switched to manual mode, the diesel engine can be started via SB1 or SB2, and stopped via SB3. When SA1 is switched to automatic mode, the diesel engine can be automatically started via one or more signals from terminals D3-1 to D3-9. When SA1 is switched to stop mode, the control cabinet will not accept any start signals or issue any start commands; it will only perform monitoring functions. Indicator light HG1 indicates whether there is power to the circuit; the light is on when there is power and off when there is no power.

[0043] The diesel engine pump control cabinet has four sets of terminals. Terminal D1 is a DC24V power supply terminal, which is led to the auxiliary cabinet and powered by the battery; terminal D2 is a passive feedback terminal, which displays the status of the diesel engine pump and is led to the DCS or other control center; D3 is a control signal terminal, which is led to the DCS, equipment switch or control center to receive start and stop signals, process the signals through the PLC and issue start and stop commands; D4 is the linkage terminal between the diesel engine pump control cabinet and the diesel engine instrument box, which is used for joint control and monitoring of the diesel engine.

[0044] Furthermore, such as Figure 3 The structure diagram of the diesel engine instrument box is shown.

[0045] The diesel engine instrument box includes: controller FPC915, relays KA1~KA2, warning lights 1HR and 2HY, communication module SG485, changeover switch SA1, push-button switches SB1~SB2, and terminal block.

[0046] In the diesel engine instrument panel, the FPC915 controller is mounted on the front panel. It connects to and displays sensors for diesel engine oil pressure, oil temperature, coolant temperature, and engine speed. It can also display the diesel engine's operating status, such as running, standby, and alarm indicators for high oil temperature and high coolant temperature. The FPC915 controller can also issue commands to start and stop the diesel engine. The FPC915 controller also has a #1 start button, a #2 start button, and a stop button.

[0047] The diesel engine instrument panel features a selector switch SA1 for toggling the control cabinet modes "Manual / Stop / Automatic". The panel also includes buttons SB1 (overspeed test), SB2 (stop reset), alarm light 1HR (overspeed stop), and alarm light 2HY (general alarm). When SA1 is switched to manual mode, the diesel engine can be started using start buttons #1 and #2 on the FPC915 controller, and stopped using the stop button on the FPC915. When SA1 is switched to automatic mode, the diesel engine can be automatically started using start signals from terminals D1-5 and D6. When SA1 is switched to stop mode, the instrument panel will not accept any start signals or issue any start commands, only performing monitoring functions. Alarm light 1HR indicates an overspeed stop alarm; when the diesel engine speed exceeds the stop set value, it will immediately stop and issue an audible and visual alarm. Alarm light 2HY indicates general abnormal conditions of the diesel engine, such as overheating, low oil pressure, or abnormal speed, and will issue an audible and visual alarm. SB1 is used to detect whether the overspeed stop function is normal. When SB1 is turned on, the controller FPC915 is locked and the diesel engine cannot be started again. At the same time, an audible and visual alarm will be issued after 1HR. SB2 is used for parking reset. When an overspeed stop occurs, SB2 needs to be manually turned on to restore the controller to normal state for easy start-up next time.

[0048] The diesel engine instrument box has four sets of terminals. Terminal D1 is the linkage terminal between the diesel engine pump control cabinet and the diesel engine instrument box, used for joint control and monitoring of the diesel engine; terminal D2 is the DC24V power supply terminal, connected to the battery for power supply; D3 is the connection terminal for various sensors of the diesel engine, used to detect data such as water temperature, oil temperature, speed, and oil pressure of the diesel engine; D4 is the start-stop terminal of the diesel engine, used to connect the emergency start device and generator.

[0049] Specifically, such as Figure 2 As shown in the diesel engine pump control cabinet structure diagram, leads D1-1 and D2 are connected to the diesel engine instrument box and the battery, providing power to the control circuit, PLC, touch screen MCGS, and analog modules. Indicator light HG1 is connected in parallel across the power supply terminals to indicate whether the circuit has power; the light is on when there is power and off when there is no power.

[0050] Furthermore, a set of remote start / stop terminals is connected to the circuit. KA7 is equipped with a self-locking circuit, and KA8 is used to cut off the power supply to KA7. When D3-3 and D4 receive a pulse signal, KA7 self-locks, and the normally open contact of KA7 remains closed, which is introduced into I1.2 of the PLC. The start command is determined by program editing and the position of the selector switch. When D3-4 and D5 receive a pulse signal, KA8 conducts, the normally closed contact of KA8 opens, and the power to the KA7 circuit is cut off. The normally open contact of KA7 returns to the normally open position. The PLC determines whether to issue a stop command based on the position of the selector switch and the input of I1.2. Generally, when the selector switch is in the non-automatic position, the PLC will not issue any start / stop command regardless of whether there is a signal on I1.2. Only in the automatic position, when there is an input signal on I1.2, will the PLC issue a start command; when the I1.2 signal disappears, the PLC issues a stop command.

[0051] Furthermore, the public alarm bell DL is connected to the circuit. DL and the normally open contact of relay KA5 are connected in series in the circuit, and KA5 controls the flow of DL. When abnormal data such as oil temperature, oil pressure, or speed occurs, the PLC performs logic operations and outputs a signal at I0.3. This causes KA5 to conduct, closing its normally open contact and DL to conduct, emitting an alarm sound. Simultaneously, the alarm status is transmitted to the DCS system. The alarm sound can be silenced using the mute button on the MCGS touchscreen, but this does not eliminate the fault. Manual troubleshooting is required, and the alarm can only be silenced after the fault is resolved.

[0052] Furthermore, terminals 3 and 4 of the changeover switch SA1 are connected to relay KA1. The normally open and normally closed contacts of KA1 are used to interlock the changeover switch of the diesel engine instrument box, thereby unifying the modes of the control cabinet and the instrument box.

[0053] Furthermore, pins 1 and 2 of the changeover switch SA1 are connected to I0.0 of the PLC, and pins 5 and 6 of SA1 are connected to I0.1 of the PLC, which facilitates the PLC to perform logic operations and switch control modes.

[0054] Furthermore, push-button switches SB1, SB2, and SB3 are connected to PLC pins I0.2, I0.3, and I0.4, respectively.

[0055] The PLC issues corresponding start and stop commands through logical operations.

[0056] Furthermore, D3-1, 2; D3-6~9 are reserved remote start signal terminals, which are connected to I1.3, I0.7, and I1.0 of the PLC, respectively. When the selector switch is in the automatic position, if any one or more of these terminals are activated, the PLC will perform logical operations based on the input signals and issue a start command.

[0057] Furthermore, the positive and negative voltages and charging current of the battery are converted into signals and input to the input terminals of the analog signal module AE04, where the actual values ​​are calculated by the PLC program.

[0058] Furthermore, the MCGS communicates with the PLC via a network cable, transmitting the PLC's values ​​to the MCGS. By configuring the MCGS, the values ​​and device status are displayed in real time.

[0059] Furthermore, relays KA2~6 are connected to the output terminals Q0.0~Q0.4 of the PLC, respectively. Based on the PLC's logic operations, KA2~6 perform corresponding actions. When the diesel engine pump control cabinet is in the automatic position and there are input signals on PLC's I1.3, I0.7, I1.0, and I1.2, KA2 conducts, issuing a start command. The normally closed contact of KA2 opens, and the signal is transmitted to the diesel engine instrument box. When the speed reaches safe operating conditions, KA3 conducts, and its normally open contact closes, transmitting the signal to the DCS system to indicate the equipment's operating status. When the diesel engine fails to start multiple times or stops due to overspeed, KA4 conducts, and its normally open contact closes, transmitting the signal to the DCS system to indicate the equipment's fault status. When the gear selector switch SA1 is in the automatic position, KA6 conducts, and its normally open contact closes, transmitting the signal to the DCS system to indicate the equipment's automatic status.

[0060] Furthermore, the PLC's COM0 serial port is connected to D4-7 and D8, leading to the diesel engine instrument box for communication and information transmission.

[0061] Specifically, such as Figure 3 As shown in the diesel engine instrument box structure diagram, D2-1 and D1-1 and D1-2 of the diesel engine pump control cabinet are connected in parallel to the battery, and the battery supplies power to terminals 1, 2, and 3 of the controller and the control circuit.

[0062] Furthermore, the wiring of terminals 5 and 6 of the FPC915 controller is led to terminals D4-2 and 3, respectively, and connected to the emergency start devices C1# and C2# of the diesel engine. When a start command is received, the controller's terminal 5 or 6 outputs, controlling C1# and C2# to conduct, thus starting the diesel engine. Generally, according to the requirements of the fire pump standard GB6245, the controller's terminal 5 or 6 is automatically switchable and alternately outputs, meaning C1# and C2# alternately conduct to start the diesel engine, facilitating multiple starts if a single start fails, thus improving the start success rate.

Claims

1. A novel diesel engine fire pump set control system, comprising a central controller and a diesel engine (1), characterized in that, It includes a diesel engine pump control cabinet (2) and a diesel engine instrument box (3). The diesel engine pump control cabinet (2) is electrically connected to the diesel engine (1). The diesel engine (1) is provided with a diesel engine instrument box (3) on its surface. The diesel engine instrument box (3) is electrically connected to the diesel engine (1). The diesel engine (1) is equipped with an oil temperature sensor, an oil pressure sensor, a water temperature sensor, a speed sensor, a starter motor, and a generator. The oil temperature sensor, oil pressure sensor, water temperature sensor, speed sensor, starter motor, and generator are all connected to the central controller. A water jacket heater is provided on the common base of the diesel engine (1), and the water jacket heater is connected to the central controller; The diesel engine (1) is electrically connected to a battery pack (4) and a battery pack (5).

2. The novel diesel engine fire pump set control system according to claim 1, characterized in that, The diesel engine (1) pump control cabinet includes a programmable controller, an analog module, a relay, a touch screen, a switch, a control button, an indicator light, a first control panel, and a sound unit. The analog module, relay, touch screen, switch, control button, and indicator light are all connected to the programmable controller, and the programmable controller is connected to the central controller.

3. A novel diesel engine fire pump set control system according to claim 2, characterized in that, The analog quantity module is connected to battery pack 1 (4) and battery pack 2 (5).

4. A novel diesel engine fire pump set control system according to claim 2, characterized in that, The first control panel is connected to the central controller. The first control panel is equipped with a three-position selector switch, a #1 start button, a #2 start button, a stop button, and a control power indicator. The three-position selector switch on the control panel is a manual / stop / automatic three-position control switch.

5. A novel diesel engine fire pump set control system according to claim 1, characterized in that, The diesel engine instrument box (3) includes an instrument box controller, a relay, a button, an indicator light, and a control panel. The relay, the second control button, the indicator light, and the second control panel are all connected to the instrument box controller, and the instrument box controller is connected to the central controller.

6. A novel diesel engine fire pump set control system according to claim 5, characterized in that, The second control button is multiple, including a #1 start button, a #2 start button, and a stop button.

7. A novel diesel engine fire pump set control system according to claim 5, characterized in that, The second control panel of the diesel engine instrument box (3) is connected to the central controller. The second control panel is equipped with a three-position switch, an overspeed test button, a stop reset button, an overspeed alarm indicator, and a common alarm indicator. The three-position switch of the second control panel is selected as manual / stop / automatic.

8. A novel diesel engine fire pump set control system according to claim 1, characterized in that, The diesel engine (1) pump control cabinet and the diesel engine instrument box (3) are equipped with a DC24V control power interface.

9. A novel diesel engine fire pump set control system according to claim 1, characterized in that, The new diesel engine fire pump set control system is suitable for diesel engine driven water supply and drainage equipment.

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