Intelligent monitoring system for leakage fault of underwater tunnel fire-fighting water system

Abstract

The invention provides an intelligent monitoring system for leakage faults of an underwater tunnel fire fighting water system. The intelligent monitoring system comprises an input module (51); a data conversion module (52); an operation processing judgment control module (53); a server (54); a fire pump control cabinet (55); a bus control module (56); an input / output module (57); a fire alarm and linkage control system (58); equipment signals of the tunnel fire-fighting water system are received and sent out by the input module (51) or the input and output module (57), are converted by the data conversion module (52), and are subjected to state judgment by the operation processing judgment control module (53). The technical problems that an underwater tunnel fire fighting water system and a water supplementing system are not high in reliability, and pipeline leakage grading judgment and early warning response are difficult are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel fire protection, and in particular to an intelligent monitoring system for leakage faults of an underwater tunnel fire protection water system. Background Art

[0002] Underwater tunnels, which cross rivers, lakes, and seas, typically utilize a fire hydrant combined with a water spray system or a combined fire hydrant and foam water spray system. Furthermore, underwater tunnels often have long distances or significant elevation differences, placing significant pressure on the firefighting pipeline network. Research has revealed common firefighting issues in underwater tunnels, including: high water pressure in the pipeline network and joints; malfunctioning deluge valves, which can cause the system to operate in a non-operating state; and inconvenient and labor-intensive inspections of firefighting equipment and pipelines.

[0003] The existing utility model patent application, "A Fire Water System Monitoring Device," with publication number CN220695743U, describes a monitoring device comprising a fire water tank supply device and a water outlet device. The water supply device includes a fire water tank, and the water outlet device is connected to the fire water tank. The monitoring device uses a water level monitoring component and a manual inspection device to determine whether a water pressure sensor is functioning properly. However, this existing device can only determine whether the water pressure sensor is functioning properly and cannot improve the reliability of the water supply system or monitor for leaks in the pipe network.

[0004] The existing invention patent application document "Fire Water System Operation Efficiency and Leakage Defect Status Inspection and Repair Method" with publication number CN109731270A, the existing method includes: collecting the switch quantity records of the fire water pump of the specified fire water system within a specified statistical period, eliminating the switch quantity records during the regular inspection period and the repeated switch quantity records; then calculating the operating time of the fire water pump; calculating the number of starts, total operating time, and average operating time of the fire water pump of the fire water system within the statistical period, and comparing them with the values ​​of the previous statistical period. If the year-on-year increase in the number of starts is greater than the threshold δ0, or the year-on-year increase in the average operating time is greater than the threshold δ1, then the fire water pump is inspected and repaired; if the year-on-year increase in the total operating time is greater than the threshold δ3, then the water storage device and its pipeline of the fire water system are inspected and repaired. However, the aforementioned existing device can only determine whether there is a leak in the fire water system, and cannot intelligently determine the specific location of the leak, and manual inspection is still required.

[0005] The existing invention patent application document with publication number CN114326468A, "A Smart Fire Remote Monitoring System Based on the Internet of Things", includes: a detection device, a data acquisition module, a data transmission module, a data processing platform and a data supervision platform. The detection device includes a fire equipment module, a fire water module, an independent smoke and gas sensor module, a fire power module, a fire door module, a video monitoring module, an electrical fire module and a fire alarm module. The output end of the detection device is connected to the input end of the data acquisition module, the output end of the data acquisition module is connected to the input end of the data transmission module, the output end of the data transmission module is connected to the input end of the data processing platform, and the output end of the data processing platform is connected to the input end of the data supervision platform. However, the aforementioned existing device only describes real-time monitoring of the fire water pipe network's pressure, liquid level, water leakage, and cover opening, but lacks specific implementation means for fire remote monitoring.

[0006] In the existing invention patent application document, "A Smart Firefighting System and Fire Sprinkler Based on the Internet of Things," with publication number CN118001645A, the data acquisition and monitoring module utilizes sensors, detectors, and cameras to remotely monitor and collect various data information and automatically plot dynamic curves using SigmaPlot software. The firefighting remote monitoring unit is used to display the status and quantity of firefighting equipment and appliances, including the total number of equipment in normal operation, offline, faulty, and in alarm. The firefighting remote monitoring unit includes monitoring for combustible gas leaks, electrical monitoring, firefighting water use, fire passage occupancy, and personnel absence. However, the aforementioned existing device only proposes to monitor the status of firefighting water in a building, the sprinkler system, the fire hydrant system, and the water pressure and level of fire water tanks or pools, but lacks specific monitoring implementation methods.

[0007] The existing invention patent application document, "A Fire Data Acquisition and Processing System Based on the Internet of Things," with publication number CN118873883A, discloses a method comprising: configuring sensors, gateway nodes, and servers to form a video surveillance subsystem, an electrical fire subsystem, a fire equipment subsystem, a smoke control and exhaust subsystem, a fire alarm subsystem, a fire water subsystem, a fire gas subsystem, a fire door subsystem, and a fire Internet of Things cloud computing center. Each subsystem transmits environmental information about the fire site to the fire Internet of Things cloud computing center, which then conducts comprehensive perception and monitoring of the fire site, determines any abnormal fire conditions at the site, issues an alarm, and outputs and executes a disaster response plan based on the alarm information. However, the aforementioned existing device only monitors the pressure and level of the fire water network in real time through water pressure sensors and liquid level sensors, making it unable to detect faults.

[0008] In summary, the existing technology has technical problems such as low reliability of underwater tunnel fire water systems and water replenishment systems, and difficulty in pipeline leakage classification determination and early warning response. Summary of the Invention

[0009] The technical problem to be solved by the present invention is: how to solve the technical problems in the existing technology of low reliability of underwater tunnel fire water systems and water replenishment systems, and difficulty in pipeline leakage classification judgment and early warning response.

[0010] The present invention solves the above technical problems by adopting the following technical solutions: An intelligent monitoring system for leakage faults in underwater tunnel fire water systems comprises:

[0011] An input module is used to receive input signals from firefighting equipment; the equipment connected to the input module includes: an electromagnetic flow meter, a water flow indicator, a liquid level gauge, a low-pressure switch, a pressure gauge, a stainless steel water flow indicator, and a stainless steel pressure gauge;

[0012] The input and output module is used to receive signals from firefighting equipment and obtain and output instructions to the calculation, processing and judgment control module. Among them, the equipment connected to the input and output module also includes: normally open electric valve; normally closed electric valve; float valve; normally open stainless steel electric valve; foam water spray valve group, etc.

[0013] The data conversion module is used to receive and convert fire equipment signals to obtain converted digital signals. The data conversion module is connected to the input module, input and output module, fire alarm and linkage control system, calculation processing and judgment control module, bus control module, etc.

[0014] The calculation processing and judgment control module is used to receive the converted digital signal; perform calculation operations, judgment operations, and control operations on the converted digital signal to obtain a system control signal. The calculation processing and judgment control module is connected to the data conversion module; wherein, the calculation processing and judgment control module is connected to the fire alarm and linkage control system through the data conversion module. It receives the system control signal and performs judgment operations on the fire situation;

[0015] The server is used to receive system control signals, generate and send alarm information to the on-duty personnel for viewing, real-time monitoring, and real-time alarm operation;

[0016] The bus control module is used to connect the input module, data conversion module, calculation processing and judgment control module, and input and output module using a preset bus to perform signal data exchange operations;

[0017] The fire control cabinet is used to start and control the fire pump and collect the fire pump's signals.

[0018] The present invention improves the reliability of the underwater tunnel fire water system through intelligent monitoring of the water supply pipe, fire water pool, fire pump, fire hydrant water supply pipe, water spray pump, foam liquid pump, water spray pipe, foam pipe, and foam water spray valve group.

[0019] In a more specific technical solution, the system further includes: a tunnel fire water tank replenishment system, including a first fault scenario and a second fault scenario;

[0020] The tunnel fire pool or tank water replenishment system includes:

[0021] Tunnel fire water tank, used to store fire water and supply water to the tunnel fire hydrant system and foam water spray system;

[0022] Normally open electric valve, used to close the normally open electric valve according to the instruction when the float valve fails to close automatically. The control module controls the normally open electric valve through the calculation processing and judgment, and feedbacks the normally open status of the electric valve;

[0023] Water supply pipe, used to supply water to the tunnel fire water tank;

[0024] Normally closed electric valve, used to open the normally closed electric valve according to the instruction when the float valve fails to start automatically, and the control module is controlled by the calculation and processing to feedback the status of the normally closed electric valve;

[0025] Electromagnetic flowmeter, used to measure and feedback water flow signals in the water supply pipeline;

[0026] The float valve is installed with the float ball to control the water inlet into the water supply pipe;

[0027] A remote water flow indicator is used to determine whether the tunnel fire water tank is full of water. The remote water flow indicator is installed on the overflow pipe.

[0028] Remote transmission function liquid level gauge, used to check the water level status of the tunnel fire water tank.

[0029] The fire water supply pipe is divided into two parts: a main supply pipe and a backup supply pipe. The main supply pipe is equipped with a normally open electric valve, an electromagnetic flowmeter, and a float valve. The backup supply pipe is equipped with a normally closed electric valve. The normally closed electric valve of the backup supply pipe is connected in parallel with the normally open electric valve, electromagnetic flowmeter, and float valve of the main supply pipe. Specifically, the fire water tank is also applicable to the tunnel fire water pool or water tank supply system.

[0030] The present invention connects electric valves in series and in parallel with the water supply pipe, installs an electromagnetic flowmeter in the main water supply pipe, installs a water flow indicator in the overflow pipe, and installs a water level sensor in the fire water tank. This effectively stops and replenishes water, generates an alarm for water supply device failure, and automatically handles the problem. This effectively improves the reliability of water supply.

[0031] In a more specific technical solution, in the first fault scenario, that is, when the fire water tank is at a low liquid level and no water is replenished due to low liquid level, the remote level meter is used to monitor that the liquid level is lower than the set value. If the electromagnetic flow meter does not change data within a preset period of time, the calculation and processing control module determines that the float valve has failed, sends a control signal to control the normally closed electric valve to open, and sends it to the on-duty personnel through the server;

[0032] When the remote function liquid level gauge reaches the preset value, the remote function water flow indicator sends an action signal, and the control module sends a control signal through calculation processing to control the normally closed electric valve to close.

[0033] In a more specific technical solution, in the second fault scenario, that is, when the high liquid level water replenishment does not stop and the fire water tank is at a high liquid level, the electromagnetic flowmeter is in a data growth state, the action state of the remote transmission function water flow indicator exceeds the preset time and cannot return to its position, or the time when the remote transmission function liquid level count value reaches the overflow water level is greater than the preset time threshold, the control module uses the calculation processing to determine that the float valve is faulty, sends a control signal, controls the normally open electric valve to close, and sends an alarm signal.

[0034] The intelligent monitoring system for underwater tunnel fire water system leakage faults solves the difficulties in the existing technology in determining the leakage classification and early warning response of underwater tunnel fire water system pipelines, equipment and facilities. The system includes:

[0035] The leakage monitoring part of the intelligent monitoring system for leakage faults of the tunnel fire water system of the present invention receives or outputs signal data of pressure gauges, low-pressure pressure switches, electromagnetic flow meters, water flow indicators, electric valves, etc. through input modules or input-output modules, and processes, calculates, and judges the signal data to analyze whether the fire hydrant pipes, water spray pipes, and foam pipes in the tunnel are leaking, and identify whether the foam water spray valve group is faulty. At the same time, an early warning is issued to the on-duty personnel through the server.

[0036] In a more specific technical solution, the system also includes a tunnel fire hydrant system;

[0037] The tunnel fire hydrant system includes:

[0038] Water supply pipes, used to supply water to the tunnel fire hydrant system;

[0039] Fire hydrant pump, which is not started on a daily basis, is used to perform pressure boosting operation during the activation of the fire hydrant in the event of a fire;

[0040] Electromagnetic flowmeter, used to monitor the flow of fire-fighting water in the water supply pipe;

[0041] Low pressure switch, used to start the fire hydrant pump when the pressure is lower than the set value when the fire hydrant is activated;

[0042] Fire hydrants are installed in water tunnels. Fire hydrants are used to control the water supply status of the fire hydrant pipes in the tunnel to carry out fire extinguishing operations;

[0043] The remote pressure gauge is used to judge the pressure change. The pressure acquisition signal of the remote pressure gauge is transmitted to the calculation processing and judgment control module in sequence through the input module and the data conversion module;

[0044] A pressure-stabilizing pump is used to replenish water and stabilize the pressure of the fire hydrant system. The pressure-stabilizing pump is connected to the fire hydrant;

[0045] The pressure stabilizing tank is connected to the pressure stabilizing pump to cooperate with the water replenishment and pressure stabilization operations of the fire hydrant system.

[0046] In a more specific technical solution, when the tunnel fire hydrant system is in normal condition and a fire occurs, a preset number of fire hydrants are manually opened; the pressure in the fire hydrant water supply pipeline decreases and the pressure-stabilizing pump starts automatically; when the pressure value of the low-pressure pressure switch on the water supply pipeline is lower than the set value, the low-pressure pressure switch automatically starts the fire hydrant pump and shuts down the pressure-stabilizing pump.

[0047] In a more specific technical solution, when a first-level leak occurs in a fire protection pipe in a tunnel, that is, the leakage volume is less than 0.8 times the design flow rate of the pressure-stabilizing pump, the calculation and processing judgment control module performs a judgment operation based on the general fire hydrant leakage judgment criteria; then, based on the signal received from the fire control cabinet, it is determined that neither the fire hydrant pump nor the pressure-stabilizing pump has operated; and based on the signal received from the fire alarm and linkage control system, it is determined that no fire has occurred, and the calculation and processing judgment control module issues a first-level leak warning through the server;

[0048] Among them, the general fire hydrant leakage judgment conditions include: the difference between two adjacent remote function pressure gauges exceeds the set fire hydrant pressure difference threshold; the transient change of the electromagnetic flow meter data at the front end of the fire hydrant pipe exceeds the set fire hydrant front end flow meter threshold; the electromagnetic flow meter at the rear end is lower than the set fire hydrant rear end flow meter threshold;

[0049] When a second-level leak occurs in the fire protection pipe in the tunnel, that is, the leakage volume is 0.8 to 1.2 times the design flow rate of the pressure-stabilizing pump, the general fire hydrant leakage judgment conditions are first met. Then, through the signal of the fire control cabinet, it is determined that the fire hydrant pump is not operating, the pressure-stabilizing pump is operating, and the operating time is greater than the preset operating time threshold. The fire alarm and linkage control system determines that no fire has occurred, and the calculation and processing judgment control module issues a second-level leak warning, closing the normally open electric valves at both ends of the pipeline section;

[0050] When a third-level leakage occurs in the fire-fighting pipe in the tunnel, that is, the leakage volume is more than 1.2 times the design flow rate of the pressure-stabilizing pump, the general fire hydrant leakage judgment conditions are first met, and then the signal from the fire control cabinet is used to determine whether both the fire hydrant pump and the pressure-stabilizing pump are in operation, or only the fire hydrant pump is in operation and the pressure-stabilizing pump is shut down. The fire alarm and linkage control system determines that no fire has occurred, and the calculation and processing judgment control module issues a third-level leakage warning, closing the normally open electric valves at both ends of the pipeline section.

[0051] In a more specific technical solution, the system also includes: Tunnel foam water spray combined fire extinguishing system:

[0052] The tunnel foam and water spray combined fire extinguishing system includes:

[0053] Water supply pipe, used to supply water to the water tunnel foam water spray combined fire extinguishing system;

[0054] The normally open electric valve is controlled by the calculation processing judgment control module, which feeds back the normally open state of the normally open electric valve;

[0055] Water spray pump, used to perform pressure boosting operation during the start-up process of the foam water spray valve group in the event of fire;

[0056] Electromagnetic flowmeter, used to monitor the flow of fire-fighting water in the water supply pipe;

[0057] The low-pressure switch is used to start the water spray pump when the pressure is lower than the set value when the foam water spray valve group is started, and use the foam water spray valve group to perform spray fire extinguishing operations;

[0058] The water spray pipe in the tunnel is connected to the foam water spray valve group installed in the water tunnel for water supply;

[0059] A remote pressure gauge and a remote stainless steel pressure gauge are used to judge pressure changes, wherein the signals of the remote pressure gauge and the remote stainless steel pressure gauge are transmitted to the calculation processing and judgment control module through the input module and the data conversion module;

[0060] The pressure-stabilizing pump is used to replenish water and stabilize the pressure of the tunnel foam water spray combined fire extinguishing system; wherein, the pressure-stabilizing tank and pressure-stabilizing pump are used to replenish water and stabilize the pressure of the tunnel foam water spray combined fire extinguishing system;

[0061] The foam liquid pipeline in the tunnel is connected to the foam water spray valve group installed in the water tunnel to supply foam;

[0062] The foam liquid pump is used to replenish foam in the tunnel foam-water spray combined fire extinguishing system during fires, as well as to maintain daily pressure stabilization in the foam liquid pipeline. The foam liquid pressure stabilizing tank works together with the foam liquid pump to maintain daily pressure stabilization in the foam liquid pipeline and prevent the foam liquid pump from being frequently activated.

[0063] The foam liquid tank is used to store the foam liquid and supply the foam liquid to the foam liquid pipeline in the tunnel through the foam liquid pump.

[0064] In a more specific technical solution, a foam water spray valve group, a normally open electric valve, a remote function pressure gauge, an electromagnetic flowmeter, a fire alarm and linkage control system, a water spray pump, and a pressure-stabilizing pump are used to perform a graded leakage judgment operation on the leakage of the water spray pipe in the tunnel of the tunnel foam water spray combined fire extinguishing system; wherein, the leakage of the water spray pipe in the tunnel includes: first-level leakage, second-level leakage, and third-level leakage; the first-level leakage is approximately less than 0.8 times the design flow of the pressure-stabilizing pump 15, the second-level leakage is approximately 0.8 to 1.2 times the design flow of the pressure-stabilizing pump, and the third-level leakage is approximately more than 1.2 times the design flow of the pressure-stabilizing pump.

[0065] The foam liquid pipeline is graded for leakage determination using a foam water spray valve group, a stainless steel electric valve, a stainless steel pressure gauge with remote transmission function, an electromagnetic flow meter, a fire alarm and linkage control system, and a foam liquid pump. The leakage situations of the foam liquid pipeline include: first-level leakage of the foam pipeline and second-level leakage of the foam pipeline. The first-level leakage is approximately 0.8 times less than the design flow of the foam pump, and the second-level leakage is approximately 0.8 times more than the design flow of the foam pump.

[0066] In a more specific technical solution, the fault type of the foam water spray valve group is determined based on the preset pressure and flow threshold conditions, wherein the fault types include: overflow of the tunnel-specific foam water spray nozzle caused by failure of the deluge valve in the foam water spray valve group.

[0067] Compared with the prior art, the present invention has the following advantages:

[0068] The present invention improves the reliability of the underwater tunnel fire water system through intelligent monitoring of the water supply pipe, fire water pool, fire pump, fire hydrant water supply pipe, water spray pump, foam liquid pump, water spray pipe, foam pipe, and foam water spray valve group.

[0069] The intelligent monitoring system for leakage faults of the tunnel fire water system of the present invention receives or outputs signal data of pressure gauges, low-pressure pressure switches, electromagnetic flowmeters, water flow indicators, electric valves, etc. through input modules or input-output modules, and processes, calculates, and judges the signal data to identify whether the water replenishment device and the foam water spray valve group are faulty, analyzes whether the fire hydrant pipes, water spray pipes, and foam pipes in the tunnel are leaking, and simultaneously sends an early warning to the on-duty personnel through the server.

[0070] The present invention connects electric valves in series and in parallel with the water supply pipe, installs an electromagnetic flowmeter in the water supply pipe, installs a water flow indicator in the overflow pipe, and installs a water level sensor in the water tank to effectively stop and replenish water. It can also alarm and automatically handle malfunctions in the water supply device, effectively improving the reliability of water supply.

[0071] The present invention solves the technical problems existing in the prior art of low reliability of underwater tunnel fire water systems and water replenishment systems, and difficulties in pipeline leakage classification determination and early warning response. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 This is a schematic diagram of the specific structure of the intelligent monitoring system for leakage faults in underwater tunnel fire water systems according to Example 1 of the present invention;

[0073] Figure 2 This is a working principle diagram of the intelligent monitoring system for leakage faults in underwater tunnel fire water systems according to Example 1 of the present invention;

[0074] Figure 3 This is a schematic diagram of specific implementation steps of the intelligent monitoring method for leakage failure of underwater tunnel fire water system according to embodiment 2 of the present invention. DETAILED DESCRIPTION

[0075] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0076] Example 1

[0077] like Figure 2 As shown, in the intelligent monitoring system for underwater tunnel fire water system leakage faults provided by the present invention, equipment signals in the tunnel fire water system are received or sent by input module 51 or input / output module 57, converted by data conversion module 52, and status determined by calculation, processing, and control module 53. The intelligent monitoring system for tunnel fire water system leakage faults includes: input module 51; data conversion module 52; calculation, processing, and control module 53; server 54; fire pump control cabinet 55; bus control module 56; input / output module 57; and fire alarm and linkage control system 58.

[0078] Specifically, the input module 51 is used to receive input signals from fire-fighting equipment, and the connected equipment includes: electromagnetic flowmeter 4; water flow indicator 7 with remote transmission function; liquid level gauge 9 with remote transmission function; low-pressure pressure switch 12; pressure gauge 13 with remote transmission function; stainless steel water flow indicator 23 with remote transmission function; stainless steel pressure gauge 26 with remote transmission function.

[0079] The input and output module is used to receive fire equipment signals and output instructions from the operation processing and judgment control module 53. The connected equipment includes: electric valve (normally open) 2; electric valve (normally closed) 2A; float valve 6; stainless steel electric valve (normally open) 24; and foam water spray valve group 25.

[0080] The data conversion module 52 converts device signals into digital signals that can be processed by the calculation, processing, judgment, and control module 53. The calculation, processing, judgment, and control module 53 is the core of the system, responsible for calculating, processing, judging, and controlling device signals. It also issues alarm messages to on-duty personnel via the server 54. Simultaneously, the calculation, processing, judgment, and control module 53 also accesses signals from the fire alarm and linkage control system 58 through the data conversion module 52 to determine the fire situation. The server 54 allows on-duty personnel to view historical information, real-time monitoring information, and real-time alarm information. All signals are exchanged via the bus of the bus control module 56. The fire control cabinet 55 controls the activation of the fire pumps and collects their signals. Each pump, or groups of pumps, has a fire pump control cabinet.

[0081] like Figure 1 As shown in this embodiment, it is a schematic diagram of the specific structure of the intelligent monitoring system for leakage faults of the underwater tunnel fire water system. The underwater tunnel water fire fighting system includes but is not limited to: a tunnel fire water pool or water tank water replenishment system, a tunnel fire hydrant system and a tunnel foam water spray combined fire extinguishing system.

[0082] Specifically, the tunnel fire water pool water supply system or the tunnel fire water tank water supply system includes but is not limited to: a tunnel fire water pool 1; a normally open electric valve; a normally closed electric valve 2A; a water supply pipe 3; a spare water supply pipe 3A; an electromagnetic flowmeter 4; a float valve 5; a float 6; a water flow indicator with a remote transmission function 7; an overflow pipe 8; and a liquid level meter with a remote transmission function 9.

[0083] Specifically, the tunnel fire water tank 1 is used to store water for the tunnel fire hydrant and foam water spray combined fire extinguishing system; the normally open electric valve 2 is normally open in normal status and will only be closed according to instructions when the float valve 5 fails. The normally open electric valve 2 can be controlled by the calculation and processing judgment control module 53, and the normally open status of the normally open electric valve 2 is fed back at the same time; the water supply pipe 3 and the spare water supply pipe 3A are used to replenish water to the tunnel fire water tank 1, and the spare water supply pipe 3A is activated when the float valve 5 of the tunnel fire water tank 1 fails at a low liquid level; the normally closed electric valve 2A is normally closed in normal status and is controlled by the calculation and processing judgment control module 53, and the status of the normally closed electric valve 2A is fed back at the same time; the electromagnetic flowmeter 4 is used to measure and feedback water flow signals; the float valve 5 is installed in conjunction with the float 6 to control the water inlet of the water supply pipe; the water flow indicator 7 with remote transmission function is used to determine whether the tunnel fire water tank 1 is full of water and is installed on the overflow pipe 8; the liquid level gauge 9 with remote transmission function is used to check the water level status of the tunnel fire water tank 1 on-site and remotely.

[0084] When the water replenishment system is operating normally, water flows through the replenishment pipe 3, the flow-opening electric valve 2, the electromagnetic flowmeter 4, and the float valve 5, and enters the tunnel fire water tank 1. As the water enters, the float 6 rises continuously. At the same time, the electromagnetic flowmeter 4 and the level gauge with remote transmission function 9 continuously transmit water level signals through the input module 51 and the data conversion module 52 to the calculation, processing, judgment and control module 53. When the water level reaches the set value, the overflow pipe 8 overflows, and the water flow indicator with remote transmission function 7 sends an action signal to the calculation, processing, judgment and control module 53. At the same time, the float 6 reaches the set position, closing the float valve 5, and the data in the electromagnetic flowmeter 4 remains unchanged. After a certain period of time, the water flow indicator with remote transmission function 7 returns to its original position, and the value of the level gauge with remote transmission function 9 stabilizes.

[0085] When the low liquid level does not cause a fault, the liquid level meter 9 with remote transmission function monitors that the liquid level is lower than the set value. Within a certain period of time, the data of the electromagnetic flowmeter 4 changes. The calculation and processing judgment control module 53 determines that the system is normal through the liquid level meter 9 and the electromagnetic flowmeter 4. There is water flow and no instructions are issued. When the liquid level is high and exceeds the normal water level without a fault, the data of the electromagnetic flowmeter 4 does not change, the value of the liquid level meter 9 with remote transmission function is stable or slightly decreases, and the return time of the water flow indicator 7 with remote transmission function does not exceed a certain period of time. The calculation and processing judgment control module 53 determines that the water replenishment system is normal and does not issue any instructions.

[0086] Fault 1: No water replenishment due to low liquid level.

[0087] Specifically, when the liquid level is low, the liquid level meter 9 with remote transmission function detects that the liquid level is lower than the set value. Within a certain period of time, the data of the electromagnetic flowmeter 4 still does not change. The calculation and processing judgment control module 53 determines that the float valve 5 is faulty, and sends a signal to control the normally closed electric valve 2A to open. The water flows into the underwater tunnel fire water tank 1 through the spare water supply pipe 3A, and at the same time sends it to the on-duty personnel through the server 54.

[0088] When the liquid level meter with remote transmission function 9 reaches a certain value and the water flow indicator with remote transmission function 7 sends an action signal, the calculation processing judgment control module 53 sends a signal to control the normally closed electric valve 2A to close.

[0089] Fault 2: Water replenishment at high liquid level does not stop.

[0090] Specifically, when the liquid level is high, the data of the electromagnetic flowmeter 4 is still increasing, the water flow indicator 7 with remote transmission function cannot return to its position after a certain period of time, and the value of the liquid level meter 9 with remote transmission function reaches the overflow water level for a certain period of time. When more than two of the three devices have the above conditions, the calculation and processing judgment control module 53 determines that the float valve 5 is faulty, and sends a signal to control the normally open electric valve 2 to close, and at the same time sends an alarm signal.

[0091] When two or more devices that had problems return to normal, that is, the data of the electromagnetic flowmeter 4 does not change, the water flow indicator 7 with remote transmission function returns to its position, and the value of the liquid level meter 9 with remote transmission function is stable, the calculation and processing judgment control module 53 determines that the water level is normal and sends a normal water level signal through the server 54.

[0092] The tunnel fire hydrant system includes: a water supply pipe 10; a normally open electric valve 2; a fire hydrant pump 11; an electromagnetic flowmeter 4; a low-pressure pressure switch 12; a fire hydrant pipe in the tunnel 17; a pressure gauge with a remote transmission function 13; a fire hydrant 14; a pressure-stabilizing pump 15; and a pressure-stabilizing tank 16.

[0093] The water supply pipe 10 is used to supply water to the fire hydrant system; the normally open electric valve 2 is normally open in daily state, and the normally open electric valve 2 can be controlled by the calculation processing judgment control module 53, and the normally open state of the normally open electric valve 2 is fed back at the same time; the fire hydrant pump 11 is used for pressurization when the fire hydrant 14 is started in case of fire, and is not started in daily state; the electromagnetic flow meter 4 is used to monitor whether the pipeline is flowing; the low pressure switch 12 is used for starting the fire hydrant 14, and when the pressure is lower than the set value, the fire hydrant pump 11 is started and the pressure regulating pump 15 is turned off; the fire hydrant pipeline 17 in the tunnel is used for supplying water to the fire hydrant 14 in the tunnel; with remote transmission The pressure gauge 13 with remote transmission function is used to judge the pressure change. The signal of the pressure gauge 13 with remote transmission function is transmitted to the operation processing judgment control module 53 through the input module 51 and the data conversion module 52; the fire hydrant 14 is a fire extinguishing device; the pressure regulating pump 15 is used for water replenishment and pressure stabilization of the normal fire hydrant system; the pressure regulating tank 16 and the pressure regulating pump 15 cooperate to be used for water replenishment and pressure stabilization of the normal fire hydrant system, reduce the start-up of the pressure regulating pump 15, and increase its service life; for every 5 fire hydrants 14 in the tunnel, there is an open electric valve 2, a pressure gauge 13 with remote transmission function, and an electromagnetic flowmeter 4.

[0094] When the fire hydrant system is normal and no fire occurs, the water supply pipe 10 and the fire hydrant pipe 17 in the tunnel are full, the fire hydrant pump 11 does not start, the low-pressure pressure switch 12 does not operate, the value of the pressure gauge 13 with remote transmission function remains unchanged or fluctuates slightly, the data of the electromagnetic flowmeter 4 does not change or increases slightly, and the pressure-stabilizing pump 15 starts regularly to replenish the pressure of the fire hydrant system and the pressure-stabilizing tank 16.

[0095] When the fire hydrant system is normal and a fire occurs, one or more fire hydrants 14 are started. At the beginning, the pressure-stabilizing pump 15 is started, and the pressure gauge 13 with remote transmission function next to the low-pressure pressure switch 12 continues to decrease. When the value is lower than the set value, the low-pressure pressure switch 12 starts the fire hydrant pump 11 and turns off the pressure-stabilizing pump 15.

[0096] A small leak occurs in a certain section of the pipeline in the tunnel, that is, the leakage volume is approximately 0.8 times less than the design flow of the pressure-stabilizing pump 15. When the leakage is of the first level: the operation and processing judgment control module 53 determines that the fire hydrant system has reached the general fire hydrant leakage judgment condition, and finds through the signal of the fire control cabinet 55 that neither the fire hydrant pump 11 nor the pressure-stabilizing pump 15 has operated, and finds through the fire alarm and linkage control system 58 that no fire has occurred, the operation and processing judgment control module 53 issues a small leak warning through the server 54.

[0097] Furthermore, the general fire hydrant leakage judgment condition includes: the difference between two adjacent pressure gauges with remote transmission function 13 exceeds the set fire hydrant pressure difference threshold value X1. Specifically, in the threshold setting operation, assuming that the fire hydrant system is in a quasi-working state, the pressure value of the pressure gauge with remote transmission function at the front end is a, and the pressure value of the pressure gauge with remote transmission function at the rear end is b, then the pressure difference between the front and back is |ab|, then the fire hydrant pressure difference threshold value X1 can be set to (0.8|ab|, 1.2|ab|), and an alarm signal can be issued when the threshold is exceeded. The specific threshold value can be determined according to actual management requirements and system requirements. Working status adjustment; the transient change of the electromagnetic flowmeter 4 data at the front end of a certain section of fire hydrant pipe exceeds the set threshold value Y1 of the flowmeter at the front end of the fire hydrant. Specifically, during the threshold setting operation, the threshold value Y1 of the flowmeter at the front end of the fire hydrant can be set to 0.5L / s. The specific threshold value can be adjusted according to actual management requirements and system status; the transient change of the electromagnetic flowmeter 4 data at the rear end is lower than the set threshold value Z1 of the flowmeter at the rear end of the fire hydrant. Specifically, during the threshold setting operation, the threshold value Z1 can be set to 0.01L / s. The specific threshold value can be adjusted according to actual management requirements and system status;

[0098] A moderate leak occurs in a certain section of the pipeline in the tunnel, that is, the leakage volume is about 0.8 to 1.2 times the design flow rate of the pressure-stabilizing pump 15. When the second-level leak occurs: the calculation and processing judgment control module 53 determines that the fire hydrant system has reached the general fire hydrant leakage judgment condition, and through the signal of the fire control cabinet 55, it is found that the fire hydrant pump 11 is not operating, and the pressure-stabilizing pump 15 is operating and the operating time far exceeds the daily operating time. In this embodiment, it can be set to 1.5 times the daily average operating time. The daily average operating time can be calculated by dividing the operating time in the quasi-working state within 30 days by the number of operations, and through the fire alarm and linkage control system 58, it is found that no fire has occurred. The calculation and processing judgment control module 53 issues a moderate leak warning and reminds or immediately closes the normally open electric valves 2 at both ends.

[0099] A large leak occurs in a certain section of the pipeline in the tunnel, that is, the leakage volume is about 1.2 times the design flow of the pressure-stabilizing pump 15. When the third level of leakage occurs: the calculation and processing judgment control module 53 determines that the fire hydrant system has reached the general fire hydrant leakage judgment condition, and the signal from the fire control cabinet 55 is found to be in operation. The pressure-stabilizing pump 15 is in operation and the running time far exceeds the daily running time. Specifically, it can be set to 1.5 times the daily average running time. The daily average running time can be calculated by dividing the running time in the quasi-working state within 30 days by the number of operations, or it has stopped; and the fire alarm and linkage control system 58 is found to have not caused a fire. The calculation and processing judgment control module 53 issues a large leak warning, and reminds or immediately closes the normally open electric valves 2 at both ends.

[0100] The tunnel foam water spray combined fire extinguishing system includes: a water supply pipe 10; a normally open electric valve 2; a water spray pump 18; an electromagnetic flowmeter 4; a low-pressure pressure switch 12; a water spray pipeline in the tunnel 19; a pressure gauge with a remote transmission function 13; a pressure regulating pump 15; a pressure regulating tank 16; a foam liquid tank 27; a foam liquid pump 28; a foam liquid pump pressure regulating tank 29; a stainless steel normally open electric valve 24; a foam liquid pipeline 20; a stainless steel pressure gauge with a remote transmission function 26; a foam water spray valve group 25; a stainless steel water flow indicator with a remote transmission function 23; a foam water spray mixed liquid pipeline 22; and a special nozzle 21 for foam water spray.

[0101] The water supply pipe 10 is used to supply water to the water spray system; the normally open electric valve 2 is normally open in daily status, and the normally open electric valve 2 can be controlled by the calculation processing judgment control module 53, and the normally open status of the normally open electric valve 2 is fed back at the same time; the water spray pump 18 is used for pressurization when the foam water spray valve group 25 is started during fire, and is not started in daily status; the electromagnetic flow meter 4 is used to monitor whether the pipeline is flowing; the low-pressure pressure switch 12 is used to start the foam water spray valve group 25, and when the pressure is lower than the set value, the water spray pump 18 is started; the water spray pipe 19 in the tunnel uses the water supply of the foam water spray valve group 25 in the tunnel; the pressure gauge 13 with remote transmission function and the stainless steel pressure gauge 26 with remote transmission function are used to judge the pressure change, and the pressure gauge 13 with remote transmission function and the stainless steel pressure gauge 26 with remote transmission function signal are passed The data is transmitted to the calculation processing judgment control module 53 through the input module 51 and the data conversion module 52; the foam water spray valve group 25 is a mixing device for foam liquid and water; the pressure regulating pump 15 is used for water replenishment and pressure stabilization of the normal water spray system; the pressure regulating tank 16 cooperates with the pressure regulating pump 15 to be used for water replenishment and pressure stabilization of the normal water spray system, reducing the startup of the pressure regulating pump 15 and increasing its service life; the foam liquid tank 27 stores the foam liquid used for one fire extinguishing, which is supplied to the foam liquid pipeline 20 in the tunnel through the foam liquid pump 28; the foam liquid pump pressure regulating tank 29 is used for foam liquid replenishment and pressure stabilization of the foam system, reducing the startup of the foam liquid pump 28; the stainless steel water flow indicator 23 with remote transmission function is used to determine whether there is liquid flowing in the foam water spray mixed liquid pipeline 22; the special nozzle 21 for foam water spray is a fire extinguishing device.

[0102] For every five foam water spray valve groups 25 in the tunnel, a normally open electric valve 2, a pressure gauge 13 with remote transmission function, and an electromagnetic flowmeter 4 are installed in the water spray pipeline 19; a normally open stainless steel electric valve 24, a stainless steel pressure gauge 26 with remote transmission function, and an electromagnetic flowmeter 4 are installed in the foam liquid pipeline 20.

[0103] The tunnel foam-water spray combined fire extinguishing system combines water and foam fire extinguishing systems through a foam-water spray valve assembly 25, with the mixture sprayed from a dedicated foam-water spray nozzle 21. This system effectively extinguishes vehicle fires within tunnels. The system is normally in operational readiness. Specifically, the water spray system operates at a constant high pressure, with the system operating pressure maintained by a water spray pressure-stabilizing pump 15 and a pressure-stabilizing tank 16. The foam liquid pump 28 and pressure-stabilizing tank 29 supply the tunnel foam liquid pipeline 20 filled with raw foam liquid.

[0104] When a fire occurs, the fire alarm and linkage control system 58 opens several foam water spray valve boxes 25, the pressure in the water spray pipe 19 in the tunnel drops, the low-pressure switch turns on the water spray pump 18, and turns off the pressure-stabilizing pump 15; at the same time, the pressure in the foam liquid pipe 20 in the tunnel drops, the foam liquid pump 28 starts, and the foam liquid and water are mixed in the foam water spray valve group 25. The mixed liquid is sprayed through the foam water spray mixed liquid pipe 22 and the foam water spray special nozzle 21. When the predetermined time is reached, the foam liquid pump 28 stops and the water spray pump 18 continues to work until it is manually shut down.

[0105] A minor leak occurs somewhere in the water spray pipe 19 in the tunnel, that is, the leakage amount is approximately 0.8 times less than the design flow rate of the pressure-stabilizing pump 15. First-level leakage: the calculation and processing judgment control module 53 determines that the water spray system has met the general water spray leakage judgment conditions, and the data of the electromagnetic flowmeters 4 before and after the foam water spray valve group 25 connected to this section of pipeline does not change, and the stainless steel water flow indicator 23 with remote transmission function does not operate. In addition, the signal from the fire pump control cabinet 55 finds that both the water spray pump 18 and the pressure-stabilizing pump 15 are not operating, and the fire alarm and linkage control system 58 confirms that no fire has occurred. This can be determined to be a minor leak in this section of pipeline. The calculation and processing judgment control module 53 issues a minor leak warning through the server 54.

[0106] Furthermore, the general water spray leakage judgment conditions include: the difference between two adjacent remote-transmission pressure gauges 13 in the tunnel exceeds a set water spray pressure difference threshold value X2. Specifically, in the aforementioned threshold setting process, assuming that the water spray system is in a quasi-working state, the pressure value of the front-end remote-transmission pressure gauge is a, and the pressure value of the rear-end remote-transmission pressure gauge is b, then the front-end and rear-end pressure difference is |ab|, and the threshold value X2 is set to (0.8|ab|, 1.2|ab|); the transient change in the data of the electromagnetic flowmeter 4 at the front end of a certain section of the water spray pipeline exceeds the set water spray front-end flowmeter threshold value Y2. Specifically, in the aforementioned threshold setting process, the threshold value X2 can be set to 0.5 L / s, and the specific threshold value can be adjusted according to actual management requirements and system status; the transient change in the data of the rear-end electromagnetic flowmeter 4 is lower than the set water spray rear-end flowmeter threshold value Z2. Specifically, in the aforementioned threshold setting process, the threshold value Z2 can be set to 0.01 L / s, and the specific threshold value can be adjusted according to actual management requirements and system status.

[0107] A moderate leak occurs somewhere in the water spray pipe 19 in the tunnel, with the leakage amount being approximately 0.8 to 1.2 times the design flow rate of the pressure-stabilizing pump 15. This is a second-level leak: the computational processing and judgment control module 53 determines that the water spray system has met the general water spray leak judgment criteria. Furthermore, the electromagnetic flowmeters 4 before and after the foam water spray valve assembly 25 connected to this section of pipe remain unchanged, the stainless steel water flow indicator 23 with remote transmission function is not operating, and the fire pump control cabinet 55 indicates that the water spray pump 18 is not operating. Furthermore, the operating time of the pressure-stabilizing pump 15 far exceeds the daily operating time. In this embodiment, the operating time can be set to 1.5 times the daily average operating time. The daily average operating time can be calculated by dividing the operating time in the quasi-operating state by the number of operations within 30 days. Furthermore, the fire alarm and linkage control system 58 confirms that no fire has occurred. This determines that this section of pipe has a moderate leak. The computational processing and judgment control module 53 issues a moderate leak warning through the server 54 and prompts or immediately shuts off the electric valves 2 at both ends.

[0108] A major leak occurs somewhere in the water spray pipe 19 in the tunnel, with the leakage amount being approximately 1.2 times the design flow rate of the pressure-stabilizing pump 15. This is a third-level leak: the calculation and processing judgment control module 53 determines that the water spray system has met the general water spray leakage judgment criteria. Furthermore, the electromagnetic flowmeters 4 before and after the foam water spray valve group 25 connected to this section of the pipeline have not changed, the stainless steel water flow indicator 23 with remote transmission function has not operated, and the water spray pump 18 has been detected to be operating through the signal of the fire pump control cabinet 55. Furthermore, the fire alarm and linkage control system 58 confirms that no fire has occurred. This determines that this is a major leak in this section of the pipeline. The calculation and processing judgment control module 53 issues a major leak warning through the server 54 and prompts or immediately shuts off the electric valves 2 at both ends.

[0109] A small leak occurs somewhere in the foam liquid pipeline 20 in the tunnel, that is, the leakage amount is approximately within 0.8 times the design flow rate of the foam liquid pump 28. First-level leakage: the calculation and processing judgment control module 53 determines that the foam system has reached the general water spray leakage judgment condition, and the data of the electromagnetic flowmeter 4 before and after the foam water spray valve group 25 connected to this section of the pipeline does not change and the stainless steel water flow indicator 23 does not operate, and the signal through the fire pump control cabinet 55 finds that the foam liquid pump 28 does not operate or the operating time is not much different from the usual operating time. In this embodiment, it can be set to 1.5 times the daily average operating time. The daily average operating time can be calculated by dividing the operating time in the quasi-working state within 30 days by the number of operations, which can be determined as a small leak in this section of the pipeline. The calculation and processing judgment control module 53 issues a small leak warning through the server 54.

[0110] Furthermore, general foam leakage judgment conditions include: the difference between two adjacent stainless steel pressure gauges 26 with remote transmission function exceeds the set foam pressure difference threshold X3. Specifically, in the aforementioned threshold setting process, assuming that the foam system is in a quasi-working state, the pressure value of the front-end pressure gauge with remote transmission function is a, and the pressure value of the rear-end pressure gauge with remote transmission function is b, then the front and back pressure difference is |ab|, and the threshold X3 is set to (0.8|ab|, 1.2|ab|); the transient change of the electromagnetic flowmeter 4 data at the front end of the foam liquid pipeline 20 in a certain section of the tunnel exceeds the set foam front-end flow threshold Y3. Specifically, in the aforementioned threshold setting process, the threshold Y3 can be set to 0.5L / s, and the specific threshold can be adjusted according to actual management requirements and system status; the transient change of the rear-end electromagnetic flowmeter 4 data is lower than the set foam rear-end flowmeter threshold Z3. Specifically, in the aforementioned threshold setting process, the threshold Z3 can be set to 0.01L / s, and the specific threshold can be adjusted according to actual management requirements and system status.

[0111] A large leak occurs somewhere in the foam liquid pipeline 20 in the tunnel, that is, the leakage volume is about 0.8 times the design flow rate of the foam liquid pump 28. Second-level leakage: the calculation and processing judgment control module 53 determines that the foam system has reached the general water spray leakage judgment condition, and the data of the electromagnetic flowmeter 4 before and after the foam water spray valve group 25 connected to this section of the pipeline does not change and the stainless steel water flow indicator 23 does not operate. In addition, the signal from the fire pump control cabinet 55 finds that the operation time of the foam liquid pump 28 far exceeds the daily operation time. In this embodiment, it can be set to 1.5 times the daily average operation time. The daily average operation time can be calculated by dividing the operation time in the quasi-working state within 30 days by the number of operations. It can be determined as a medium leak in this section of the pipeline. The calculation and processing judgment control module 53 issues a medium leak warning through the server 54, and reminds or immediately shuts down the electric valves 2 at both ends.

[0112] In this embodiment, it is determined whether there is a fault inside the foam water spray valve group 25. The main fault of the foam water spray valve group 25 is that the internal deluge valve is not closed tightly, causing the nozzle 21 to overflow. When the pressure gauge 13 with a remote transmission function before and after the water spray pipe 19 in a certain section of the tunnel exceeds the set water spray pressure difference threshold X2 or the pressure gauge 13 with a remote transmission function before and after the foam liquid pipe 20 in the tunnel exceeds the set foam pressure difference threshold X3; the electromagnetic flow 4 data at the front end of the tunnel water spray pipe 19 exceeds the set water spray front flow meter threshold Y2 or the electromagnetic flow 4 data at the front end of the tunnel foam liquid pipe 20 exceeds the set foam front flow meter threshold Y3; the electromagnetic flow 4 data at the rear end of the tunnel water spray pipe 19 exceeds the set water spray rear end flow meter threshold Z2 or the rear end of the tunnel foam liquid pipe 20 exceeds the set foam pressure difference threshold X3; The transient change of the electromagnetic flow rate 4 data exceeds the set foam rear-end flow meter threshold Z3; and the electromagnetic flow meter 4 of the water spray pipe 19 in front of a foam water spray valve group 25 connected to this section of pipeline or the electromagnetic flow meter 4 of the foam liquid pipeline 20 exceeds the set foam water spray valve group flow threshold W1. Specifically, in the aforementioned threshold setting process, the threshold W1 can be set to 0.1L / s. The specific threshold can be adjusted according to actual management requirements and system status, or the stainless steel water flow indicator 23 with remote transmission function is activated, which can determine that the foam water spray valve group 25 has a leakage fault. The calculation and processing judgment control module 53 issues a foam water spray valve group 25 leakage fault warning through the server 54.

[0113] In order to avoid false alarms of the intelligent monitoring system for leakage failures of the underwater tunnel fire water system, when a fire is confirmed, the fire alarm and linkage control system 58 will be used to shut down the alarm device of the intelligent monitoring system for leakage failures of the underwater tunnel fire water system. That is, the server 54 only displays the readings of various sensors such as the electromagnetic flow meter 4, the liquid level gauge 9 with remote transmission function, the low-pressure pressure switch 12, the pressure gauge 13 with remote transmission function, and the stainless steel pressure gauge 26 with remote transmission function, but does not issue alarm and linkage control signals.

[0114] Example 2

[0115] like Figure 3 As shown, the intelligent monitoring method for leakage faults in underwater tunnel fire water systems provided by the present invention includes the following specific implementation steps:

[0116] S1. Receive input firefighting equipment signals using the input module 51. Specifically, the equipment connected to the input module 51 includes, but is not limited to, the electromagnetic flow meter 4; the water flow indicator 7; the liquid level gauge 9; the low-pressure switch 12; the pressure gauge 13; the stainless steel water flow indicator 23; and the stainless steel pressure gauge 26. In this embodiment, the water flow indicator 7, the liquid level gauge 9, the pressure gauge 13, the stainless steel water flow indicator 23, and the stainless steel pressure gauge 26 can realize remote signal transmission.

[0117] S2. Utilize the input / output module 57 to receive signals from firefighting equipment and output instructions to the calculation processing and judgment control module 53. Specifically, the devices connected to the input / output module 57 include: the normally open electric valve 2; the normally closed electric valve 2A; the float valve 6; the normally open stainless steel electric valve 24; and the foam water spray valve group 25.

[0118] S3. Using the data conversion module 52, the device signal is converted into a digital signal that can be processed by the calculation processing judgment control module 53. In this embodiment, the calculation processing judgment control module 53 is the core of the system, realizing the calculation, processing, judgment and control of the device signal.

[0119] S4, using the server 54 to send alarm information to the on-duty personnel, so that the on-duty personnel can view historical information, real-time monitoring information, and real-time alarm information;

[0120] S5, using the calculation processing judgment control module 53, through the data conversion module 52 to access the fire alarm and linkage control system 58 signal, to perform fire situation judgment operation;

[0121] S6. Using the bus of the bus control module 56, data exchange is performed on all signals;

[0122] S7. Use the fire control cabinet 55 to control the start of the fire pump and collect the fire pump signal; specifically, each pump or every several pumps has a fire pump control cabinet.

[0123] In summary, the present invention can diagnose faults in low-liquid-level water replenishment devices for tunnel-specific firefighting water tanks. When the liquid level is low, a remote-controlled immersion level gauge detects that the liquid level is below a set value. If the electromagnetic flowmeter data remains unchanged for a certain period of time, the system will determine that the float valve is faulty and send a signal to open the normally closed electric valve while simultaneously issuing an alarm. When the remote-controlled immersion level gauge reaches a certain value and the water flow indicator sends an action signal, the computational processing and judgment control module sends a signal to close the normally closed electric valve.

[0124] The present invention can diagnose faults in high-liquid-level water replenishment devices for tunnel-specific fire water tanks. When the liquid level is high, if the electromagnetic flowmeter data continues to increase, the water flow indicator remains inactive for a certain period of time, and the remote-controlled liquid level counter exceeds the set value for a certain period of time, and if these conditions occur in more than two of the three devices, the processing module determines that the float valve is faulty, sends a signal to close the normally open electric valve, and simultaneously issues an alarm. When two or more of the devices experiencing the condition return to normal—that is, the electromagnetic flowmeter data remains unchanged, the water flow indicator returns to its original position, and the remote-controlled liquid level counter remains stable—the system issues a normal water level signal.

[0125] The underwater tunnel fire hydrant system of the present invention is equipped with an electric valve, a pressure gauge with a remote transmission function, and an electromagnetic flow meter for every five fire hydrants, which can judge small leaks, medium leaks, and large leaks. Small leaks are approximately less than 0.8 times the design flow rate of the pressure-stabilizing pump, medium leaks are approximately 0.8 to 1.2 times the design flow rate of the pressure-stabilizing pump, and large leaks are approximately more than 1.2 times the design flow rate of the pressure-stabilizing pump. Judgment of small leaks: the difference between two adjacent pressure gauges exceeds the set fire hydrant pressure difference threshold value X1. Specifically, during the threshold setting operation, assuming that the fire hydrant system is in a quasi-working state, the pressure value of the pressure gauge with a remote transmission function at the front end is a, and the pressure value of the pressure gauge with a remote transmission function at the rear end is b, then the pressure difference between the front and back is |ab|, then the fire hydrant pressure difference threshold value X1 can be set to (0.8|ab|, 1.2|ab|). When the threshold is exceeded, an alarm signal can be issued. The specific threshold value can be adjusted according to the actual management requirements and the working status of the system; the set fire hydrant front flow meter threshold value Y1, specifically, during the threshold setting operation, the fire hydrant front flow meter can be set. The end flow meter threshold Y1 is 0.5L / s, and the specific threshold can be adjusted according to actual management requirements and system status; the transient change of the back-end electromagnetic flowmeter 4 data is lower than the set fire hydrant back-end flow meter threshold Z1. Specifically, during the threshold setting operation, the threshold Z1 can be set to 0.01L / s, and the specific threshold can be adjusted according to actual management requirements and system status; and through the signal of the fire control cabinet, it is found that neither the fire hydrant pump nor the pressure regulating pump has been activated, and through the fire alarm and linkage control system, it is found that no fire has occurred, which can be determined as a small leak in this section of the pipeline, and the calculation and processing judgment control module issues a small leak warning through the server. Moderate leakage judgment: the difference between two adjacent pressure gauges exceeds the set fire hydrant pressure difference threshold X1; the transient change of the electromagnetic flowmeter 4 data at the front end of a certain section of fire hydrant pipe exceeds the set fire hydrant front end flowmeter threshold Y1; the transient change of the rear end electromagnetic flowmeter data is lower than the set fire hydrant rear end flowmeter threshold Z1; and the signal from the fire control cabinet is found that the fire hydrant pump is not operating, and the operating time of the pressure regulating pump is far longer than the daily operating time. In this embodiment, it can be set to 1.5 times the daily average operating time. The daily average operating time can be calculated by dividing the operating time in the quasi-working state within 30 days by the number of operations, and the fire alarm and linkage control system finds that no fire has occurred, it can be determined as a moderate leakage in this section of the pipeline. The calculation and processing judgment control module issues a moderate leakage warning through the server and immediately turns off the electric valves at both ends.Judgment of a major leakage: the difference between two adjacent pressure gauges exceeds the set fire hydrant pressure difference threshold X1; the transient change of the electromagnetic flowmeter 4 data at the front end of a section of fire hydrant pipe exceeds the set fire hydrant front end flowmeter threshold Y1; the transient change of the rear end electromagnetic flowmeter data is lower than the set fire hydrant rear end flowmeter threshold Z1; and the fire hydrant pump is detected to be in operation through the signal of the fire control cabinet, and the fire alarm and linkage control system are found to have no fire, it can be determined that there is a major leakage in this section of the pipeline. The calculation and processing judgment control module issues a major leakage warning through the server and immediately turns off the electric valves at both ends.

[0126] The underwater tunnel water spray system of the present invention is equipped with one electric valve, one remote pressure gauge, and one electromagnetic flowmeter for each of the five foam water spray valve groups. These valves can detect minor, medium, and major leaks in the water spray system pipelines. Minor leaks are estimated to be less than 0.8 times the design flow rate of the pressure-stabilizing pump 15, medium leaks are estimated to be between 0.8 and 1.2 times the design flow rate of the pressure-stabilizing pump, and major leaks are estimated to be greater than 1.2 times the design flow rate of the pressure-stabilizing pump. Minor leak judgment: The difference between two adjacent pressure gauges exceeds the set water spray pressure difference threshold value X2. Specifically, in the aforementioned threshold setting process, assuming that the water spray system is in quasi-working state, the pressure value of the pressure gauge with remote transmission function at the front end is a, and the pressure value of the pressure gauge with remote transmission function at the rear end is b, then the pressure difference between the front and back ends is |ab|, and the threshold value X2 is set to (0.8|ab|, 1.2|ab|); the transient change of the electromagnetic flowmeter data at the front end of a certain section of water spray pipe exceeds the set water spray front end flowmeter threshold value Y2. Specifically, in the aforementioned threshold setting process, the threshold value X2 can be set to 0.5L / s. The specific threshold value The value can be adjusted according to actual management requirements and system status; the transient change of the back-end electromagnetic flowmeter data is lower than the set water spray back-end flowmeter threshold Z2. Specifically, in the aforementioned threshold setting process, the threshold Z2 can be set to 0.01L / s. The specific threshold can be adjusted according to actual management requirements and system status; and the electromagnetic flowmeter data before and after the water spray valve group box connected to this section of pipeline does not change and the water flow indicator does not operate, and the signal from the fire control cabinet finds that neither the water spray pump nor the pressure regulating pump operates, it can be determined that there is a slight leak in this section of pipeline, and the calculation and processing judgment control module issues a slight leak warning through the server. Moderate leak determination: The difference between two adjacent pressure gauges exceeds the set water spray pressure differential threshold X2; the transient change in the electromagnetic flowmeter data at the front end of a section of water spray pipe exceeds the set water spray front-end flowmeter threshold Y2; the transient change in the electromagnetic flowmeter data at the rear end falls below the set water spray rear-end flowmeter threshold Z2; the electromagnetic flowmeter data before and after the water spray valve manifold connected to this section of pipe remain unchanged, the water flow indicator does not operate, and the fire control cabinet indicates that the water spray pump is not operating, and the operating time of the pressure regulating pump far exceeds the daily operating time. In this embodiment, it can be set to 1.5 times the daily average operating time. The daily average operating time can be calculated by dividing the operating time in the quasi-working state within 30 days by the number of operations. This determines that the pipe section has a moderate leak. The calculation processing and judgment control module issues a moderate leak warning through the server and immediately closes the electric valves at both ends.Judgment of a major leak: the difference between two adjacent pressure gauges exceeds the set water spray pressure difference threshold X2; the transient change of the electromagnetic flowmeter data at the front end of a section of water spray pipe exceeds the set water spray front end flowmeter threshold Y2; the transient change of the electromagnetic flowmeter data at the rear end is lower than the set water spray rear end flowmeter threshold Z2; and the electromagnetic flowmeter data before and after the water spray valve group box connected to this section of pipe does not change and the water flow indicator does not operate, and the water spray pump is detected to be operating through the signal of the fire control cabinet, and after manual confirmation that no fire has occurred, it can be determined that there is a major leak in this section of pipe. The calculation and processing judgment control module issues a major leak warning through the server and immediately turns off the electric valves at both ends.

[0127] The foam system of the present invention has 1 stainless steel electric valve, 1 stainless steel pressure gauge with remote transmission function and 1 electromagnetic flow meter for every 5 foam water spray valve groups, which can judge the small leakage and large leakage of the foam system. Small leakage is about 0.8 times or less of the design flow rate of the foam pump, and large leakage is about 0.8 times or more of the design flow rate of the foam pump. Judgment of small leakage: the difference between two adjacent pressure gauges exceeds the set foam pressure difference threshold value X3. Specifically, in the aforementioned threshold setting process, assuming that the foam system is in a quasi-working state, the pressure value of the pressure gauge with remote transmission function at the front end is a, and the pressure value of the pressure gauge with remote transmission function at the rear end is b, then the pressure difference between the front and back is |ab|, then the threshold value X3 is set to (0.8|ab|, 1.2|ab|); the transient change of the electromagnetic flow meter data at the front end of the foam liquid pipeline in a certain section of the tunnel exceeds the set foam front end flow threshold value Y3. Specifically, in the aforementioned threshold setting process, the threshold value Y3 can be set to 0.5L / s, and the specific threshold value can be adjusted according to actual management requirements and system status; the transient change of the rear end electromagnetic flow meter data is lower than the set foam The back-end flow meter threshold Z3, specifically, in the aforementioned threshold setting process, the threshold Z3 can be set to 0.01L / s, and the specific threshold can be adjusted according to actual management requirements and system status; and the electromagnetic flowmeter data before and after the water spray valve group box connected to this section of pipeline does not change and the water flow indicator does not operate, and the signal from the fire control cabinet finds that the foam liquid pump does not operate or the operating time is not much different from the usual operating time. In this embodiment, it can be set to 1.5 times the daily average operating time. The daily average operating time can be calculated by dividing the operating time in the quasi-working state within 30 days by the number of operations, which can be determined as a slight leak in this section of pipeline. The calculation and processing judgment control module issues a slight leak warning of the foam system through the server. Judgment of a major leak: the difference between two adjacent pressure gauges exceeds the set foam pressure difference threshold X3; the transient change in the electromagnetic flowmeter data at the front end of the foam liquid pipeline in a certain section of the tunnel exceeds the set foam front-end flow threshold Y3; the specific threshold can be adjusted according to actual management requirements and system status, and the transient change in the back-end electromagnetic flowmeter data is lower than the set foam flowmeter threshold Z3; and the electromagnetic flowmeter data before and after the water spray valve group box connected to this section of the pipeline does not change and the water flow indicator does not operate, and the signal from the fire control cabinet finds that the foam liquid pump operation time far exceeds the daily operation time. In this embodiment, it can be set to 1.5 times the daily average operation time. The daily average operation time can be calculated by dividing the operation time in the quasi-working state within 30 days by the number of operations, which can determine that it is a major leak in this section of the pipeline. The calculation and processing judgment control module issues a major leak warning for the foam system through the server.

[0128] The present invention can also determine whether the foam water spray valve group has failed. The main failure of the water spray valve group box is that the rain valve is not closed tightly, causing the nozzle to overflow. When the pressure difference before and after the water spray pipe in a certain section of the water spray system in the tunnel exceeds the set water spray pressure difference threshold X2 or the pressure difference before and after the foam liquid pipe in the tunnel exceeds the set foam pressure difference threshold X3; the electromagnetic flow data at the front end of the water spray pipe in the tunnel exceeds the set water spray front flow meter threshold Y2 or the electromagnetic flow data at the front end of the foam liquid pipe in the tunnel exceeds the set foam front flow meter threshold Y3; and the electromagnetic flow data at the rear end of the water spray pipe in the tunnel exceeds the set water spray rear end flow meter threshold Z2 or the foam liquid pipe in the tunnel exceeds the foam front end flow meter threshold Y3. The transient change of the electromagnetic flow data at the back end exceeds the set foam back end flow meter threshold Z3; and the electromagnetic flow meter of the water spray pipe or foam liquid pipe in front of a foam water spray valve group connected to this section of pipeline exceeds the set foam water spray valve group flow threshold W1. Specifically, in the aforementioned threshold setting process, the threshold W1 can be set to 0.1L / s. The specific threshold can be adjusted according to actual management requirements and system status, or the water flow indicator is activated, which can determine that the foam valve group box is leaking. The calculation and processing judgment control module issues a foam water spray valve group leakage fault warning through the server.

[0129] In order to avoid false alarms of the intelligent monitoring system for leakage failures of underwater tunnel fire water systems, when a fire is confirmed, the fire alarm and linkage control system will jointly shut down the alarm and linkage devices of the intelligent monitoring system for leakage failures of underwater tunnel fire water systems.

[0130] The present invention solves the technical problems existing in the prior art, such as the low reliability of underwater tunnel fire water systems and water replenishment systems, and the difficulties in pipeline leakage classification determination and early warning response.

[0131] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the fields of underwater emergency disaster reduction and fire-fighting equipment, underwater facility emergency equipment, industrial control systems, industrial control systems, industrial main controllers, factory control systems, Internet of Things control systems, supervisory control and data acquisition systems, data acquisition control systems, instrument data acquisition, Internet of Things data acquisition, industrial monitoring software, fire-fighting equipment, etc. should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Intelligent monitoring system for leakage fault of underwater tunnel fire water system, characterized by: The system comprises: An input module (51) is used to receive input firefighting equipment signals; wherein the equipment connected to the input module (51) includes: an electromagnetic flow meter (4), a water flow indicator (7), a liquid level meter (9), a low-pressure switch (12), a pressure gauge (13), a stainless steel water flow indicator (23), and a stainless steel pressure gauge (26); An input / output module (57) is used to receive signals from the fire fighting equipment, obtain and output instructions from the calculation processing and judgment control module (53); wherein the equipment connected to the input / output module (57) further includes: a normally open electric valve (2); a normally closed electric valve (2A); a float valve (6); a normally open stainless steel electric valve (24); and a foam water spray valve group (25); A data conversion module (52) is used to receive and convert the fire-fighting equipment signal to obtain a converted digital signal. The data conversion module (52) is connected to the input module (51), the input-output module (57), the fire alarm and linkage control system (58), the calculation processing and judgment control module (53), and the bus control module (56); The operation processing judgment control module (53) is used to receive the converted digital signal; perform operation, judgment and control operations on the converted digital signal to obtain a system control signal, and the operation processing judgment control module (53) is connected to the data conversion module (52); wherein the operation processing judgment control module (53) is connected to the fire alarm and linkage control system (58) through the data conversion module (52). Receive the system control signal and perform the judgment operation on the fire situation; A server (54) is used to receive the system control signal, generate and send alarm information to the on-duty personnel for viewing, real-time monitoring, and real-time alarm operation; A bus control module (56) is used to connect the input module (51), the data conversion module (52), the calculation processing judgment control module (53), and the input and output module (57) using a preset bus to perform signal data exchange operations; The fire control cabinet (55) is used to start and control the fire pump and collect signals from the fire pump.

2. The intelligent monitoring system for underwater tunnel fire water system leakage fault according to claim 1 is characterized in that: The system also includes: a tunnel fire water tank replenishment system, including a first fault scenario and a second fault scenario; The tunnel fire water pool water replenishment system includes: A tunnel fire water tank (1) is used to store fire water and supply water to tunnel fire hydrants and foam water spray; The normally open electric valve (2) is used to close the normally open electric valve (2) according to an instruction when the float valve (5) fails to close automatically, and to control the normally open electric valve (2) by utilizing the calculation processing judgment control module (53) to feed back the normally open state of the electric valve (2); A water supply pipe (3) for supplying water to the tunnel fire water pool (1); The normally closed electric valve (2A) is used to open the normally closed electric valve (2A) according to instructions when the float valve (5) fails to automatically start, and is controlled by the calculation processing judgment control module (53) to feedback the state of the normally closed electric valve; An electromagnetic flowmeter (4) is used to measure and feedback water flow signals on the water supply pipe (3); The float valve (5) and the float (6) are adapted to be installed to control the water inlet of the water supply pipe (3); A remote function water flow indicator (7) for judging whether the tunnel fire water pool (1) is full of water, the remote function water flow indicator (7) being installed on the overflow pipe 8; A remote level gauge 9 for checking the water level of the tunnel fire water tank (1); 3. The intelligent monitoring system for underwater tunnel fire water system leakage fault according to claim 2 is characterized in that: In the first fault scenario, when the tunnel fire water tank (1) is at a low liquid level, the remote transmission function liquid level meter 9 monitors that the liquid level is lower than a set value, and within a preset period, the electromagnetic flow meter (4) does not change data, then the calculation processing judgment control module (53) determines that the float valve (5) has failed, sends a control signal to control the normally closed electric valve to open, and sends the signal to the on-duty personnel through the server 54; When the remote function liquid level meter (9) reaches a preset value, the remote function water flow indicator 7 sends an action signal, and the calculation processing judgment control module 53 sends a control signal to control the normally closed electric valve to close; wherein, the fire water supply pipe (3) includes: a main water supply pipe (3) and a spare water supply pipe (3A); a normally open electric valve (2), an electromagnetic flow meter (4), and a float valve (5) are installed on the main water supply pipe (3) in sequence; a normally closed electric valve (2A) is installed on the spare water supply pipe (3A); the normally closed electric valve (2A) is connected in parallel with the normally open electric valve (2), the electromagnetic flow meter (4), and the float valve (5) on the main water supply pipe (3).

4. The intelligent monitoring system for underwater tunnel fire water system leakage fault according to claim 2 is characterized in that: In the second fault scenario, when the tunnel fire water tank (1) is at a high liquid level, the electromagnetic flowmeter (3) is in a data growth state, the action state of the remote function water flow indicator (7) exceeds the preset time and cannot return to its original position, or when the time for the value of the remote function liquid level meter 9 to reach the overflow water level is greater than the preset time threshold, the calculation processing judgment control module (53) is used to determine that the float valve (5) is faulty, and the control signal is issued to control the normally open electric valve (2) to close and issue an alarm signal.

5. The intelligent monitoring system for leakage faults of underwater tunnel fire water systems according to claim 1 is characterized in that: The system also includes a tunnel fire hydrant system; The tunnel fire hydrant system includes: a water supply pipe (10) for supplying water to the tunnel fire hydrant system; The fire hydrant pump (11) is not started on a daily basis and is used to perform a pressure-boosting operation during the start-up process of the fire hydrant (14) in the event of a fire; an electromagnetic flowmeter (4) for monitoring whether the fire-fighting water in the water supply pipe (10) is flowing; A low-pressure switch (12) is used to start the fire hydrant pump (11) when the pressure of the fire hydrant (14) is lower than a set value when the fire hydrant (14) is started; A fire hydrant (14) is provided in the water tunnel, and the fire hydrant 14 is used to control the water supply state of the fire hydrant pipe (17) in the tunnel to perform fire extinguishing operations; A remote pressure gauge (13) is used to determine pressure changes, and transmits the pressure acquisition signal of the remote pressure gauge 13 to the calculation processing judgment control module (53) through the input module 51 and the data conversion module 52 in sequence; A pressure-stabilizing pump (15) is used to perform water replenishment and pressure-stabilizing operations on the fire hydrant system, and the pressure-stabilizing pump (15) is connected to the fire hydrant (14); The pressure stabilizing tank (16) is connected to the pressure stabilizing pump (15) to cooperate with the water replenishment and pressure stabilization operations of the fire hydrant system.

6. The intelligent monitoring system for leakage faults of underwater tunnel fire water system according to claim 5 is characterized in that: When the tunnel fire hydrant system is in a normal state and a fire occurs, a preset number of the fire hydrants (14) are manually opened; the pressure of the water supply pipeline (10) decreases, and the pressure-stabilizing pump (15) is automatically started. When the pressure value of the remote function pressure gauge (13) is lower than the set value, the low-pressure pressure switch (12) is used to start the fire hydrant pump (11) and shut down the pressure-stabilizing pump (15).

7. The intelligent monitoring system for underwater tunnel fire water system leakage fault according to claim 5 is characterized in that: When a first-level leakage occurs in a fire protection pipe in a tunnel, the calculation processing judgment control module 53 is used to perform a judgment operation according to a first-level leakage threshold condition; a signal from the fire control cabinet (55) is received and determined based on the fire control cabinet (55) that the fire hydrant pump (11) and the pressure regulating pump (15) are not in operation; a signal from the fire alarm and linkage control system 58 is received and determined that no fire has occurred, and an early warning of the first-level leakage is issued through the server (54) using the calculation processing judgment control module (53); The first level leakage condition includes: the difference between two adjacent remote function pressure gauges (13) exceeds the set fire hydrant pressure difference threshold; the transient change of the data of the electromagnetic flowmeter (4) at the front end of the fire hydrant pipe exceeds the set fire hydrant front end flowmeter threshold, and the electromagnetic flowmeter (4) at the rear end is lower than the set fire hydrant rear end flowmeter threshold; When a second-level leakage occurs in the fire protection pipe in the tunnel, and the second-level leakage threshold condition is met, the fire hydrant pump (11) is determined to be inoperative through the signal of the fire control cabinet (5), the pressure regulating pump (15) is inoperative, and the operating time is greater than the preset operating time threshold, and the fire alarm and linkage control system 58 determines that no fire has occurred, so that the calculation processing judgment control module (53) issues a warning of the second-level leakage and closes the normally open electric valves (2) at both ends of the pipe section; When a third-level leakage occurs in the fire protection pipe in the tunnel, and the third-level leakage threshold condition is met, the fire hydrant pump (11) and the pressure regulating pump (15) are both actuated through the signal from the fire protection control cabinet (55), and it is determined that no fire has occurred through the fire alarm and linkage control system 58. The calculation processing judgment control module (53) issues a warning of the third-level leakage, and closes the normally open electric valves (2) at both ends of the pipe section.

8. The intelligent monitoring system for underwater tunnel fire water system leakage fault according to claim 1 is characterized in that: The system also includes: a tunnel foam water spray combined fire extinguishing system: The tunnel foam water spray combined fire extinguishing system includes: A water supply pipe (10) for supplying water to the tunnel foam water spray combined fire extinguishing system; The normally open electric valve (2) is controlled by the calculation processing judgment control module (53) to feed back the normally open state of the normally open electric valve (2); A water spray pump (18) is used to perform a pressure-boosting operation during the activation of the foam water spray valve assembly (25) in the event of a fire; an electromagnetic flowmeter (4) for monitoring whether the fire-fighting water in the water supply pipe (10) is flowing; A low-pressure switch (12) is used to start the normally closed water spray pump (18) when the pressure is lower than a set value when the foam water spray valve group (25) is started, and to perform a spray fire extinguishing operation using the foam water spray valve group (25); The water spray pipe (19) in the tunnel is connected to the foam water spray valve group (25) installed in the water tunnel for water supply; A remote function pressure gauge (13) and a remote function stainless steel pressure gauge (26) are used to judge pressure changes, wherein the signals of the remote function pressure gauge (13) and the remote function stainless steel pressure gauge (26) are transmitted to the calculation processing judgment control module (53) through the input module (51) and the data conversion module (52); A pressure stabilizing pump (15) is used to perform water replenishment and pressure stabilization operations on the tunnel foam water spray combined fire extinguishing system; wherein, the pressure stabilizing tank (16) and the pressure stabilizing pump (15) are used to perform water replenishment and pressure stabilization operations on the tunnel foam water spray combined fire extinguishing system; The foam water spray valve group (25) is installed in the water tunnel, and the foam liquid pipeline (20) in the tunnel is connected to the foam water spray valve group (25) to provide foam; A foam liquid pump (28) is used to replenish foam in the tunnel foam-water spray combined fire extinguishing system in case of fire, and to stabilize the pressure of the foam liquid pipeline (20) on a daily basis; a foam liquid pressure stabilizing tank (29) works together with the foam liquid pump (28) to stabilize the pressure of the foam liquid pipeline (20) on a daily basis, and to perform frequent startup preventive operations on the foam liquid pump (28); and a foam liquid tank (27) is used to store foam liquid, and to supply the foam liquid to the foam liquid pipeline (20) in the tunnel through the foam liquid pump (28).

9. The intelligent monitoring system for underwater tunnel fire water system leakage fault according to claim 8 is characterized in that: The foam water spray valve group (25), the normally open electric valve (2), the remote transmission function pressure gauge (13), the electromagnetic flowmeter (4), the fire alarm and linkage control system (58), and the foam liquid pump (28) are used to perform a graded leakage judgment operation on the leakage of the water spray pipe in the tunnel of the tunnel foam water spray combined fire extinguishing system; wherein the leakage of the water spray pipe in the tunnel includes: first grade leakage, second grade leakage, and third grade leakage; The foam water spray valve group (25), the stainless steel electric valve, the stainless steel pressure gauge with remote transmission function, and the electromagnetic flowmeter are used to perform a graded leakage determination operation on the foam liquid pipeline; wherein the leakage conditions of the foam liquid pipeline include: first-grade leakage of the foam pipeline and second-grade leakage of the foam pipeline.

10. The intelligent monitoring system for leakage faults of underwater tunnel fire water system according to claim 8, characterized in that: The fault type of the foam water spray valve group (25) is determined according to preset pressure and flow threshold conditions, wherein the fault type includes overflow of the tunnel-specific foam water spray nozzle (21) caused by a failure of a deluge valve in the foam water spray valve group (25).

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