A fire prevention and control system for urban rail transit vehicles

Abstract

This embodiment discloses a fire prevention and control system for urban rail transit vehicles. It utilizes a single fire extinguishing pipeline and fire controller to achieve integrated prevention and control management of electrical cabinets and battery boxes within the urban rail transit vehicles. Simultaneously, the invention employs both temperature-sensing cables and temperature-sensing magnetic generator detectors for joint detection, enabling timely detection of fire information and rapid fire suppression in the event of a fire. This protects public health and safety, reduces vehicle and equipment property damage, and enhances the safety of train operation. Considering the fire hazards and dimensions of urban rail vehicles, this invention effectively controls fires in their early stages, better protecting personnel and equipment.

Description

Technical Field

[0001] This invention relates to the field of fire protection technology, and in particular to a fire prevention and control system for urban rail transit vehicles. Background Technology

[0002] As a crucial component of public transportation, the fire safety of urban rail transit vehicles significantly impacts public safety. Although most rail transit vehicles in China are equipped with fire prevention facilities, the vast majority only have fire extinguishers installed according to standard requirements.

[0003] With the application and popularization of fully automated vehicle detection and fire protection standards, especially the EN45545 standard, vehicle-mounted fire systems are gradually shifting from conventional fire extinguishers to active fire prevention and control systems.

[0004] In existing fire prevention technologies for rail transit vehicles, two separate systems are used for the main detection locations—electrical cabinets and battery boxes—to install detection and fire suppression equipment. This occupies a significant amount of space and is costly within the limited space of urban rail vehicles. Furthermore, if one detection system in the electrical cabinet or battery box malfunctions, timely fire suppression at the corresponding location is impossible. Additionally, existing technologies rely on a single method for fire detection, resulting in inaccurate and untimely fire assessments. Summary of the Invention

[0005] This invention discloses a fire prevention and control system for urban rail transit vehicles to overcome the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A fire prevention and control system for urban rail transit vehicles includes: an electrical cabinet, a battery box, and a fire controller; it also includes fire extinguishing pipelines, fire extinguishing cylinders in the electrical cabinet, sprinklers in the electrical cabinet, fire extinguishing cylinders in the battery box, and sprinklers in the battery box. The two ends of the fire extinguishing pipeline are respectively connected to the electrical cabinet sprinkler head and the battery box sprinkler head; the electrical cabinet sprinkler head and the battery box sprinkler head are respectively installed inside the electrical cabinet and the battery box; The fire extinguishing cylinders in the electrical cabinet and the battery box are both connected to the fire extinguishing pipeline. The electrical cabinet is equipped with a first temperature sensing cable and a first temperature sensing magnetic generator detector, which are used to collect the first temperature signal and the second temperature signal inside the electrical cabinet, respectively. The battery box is equipped with a second temperature sensing cable and a second temperature sensing magnetic generator detector, which are used to collect the third temperature signal and the fourth temperature signal inside the battery box, respectively. The first temperature-sensing cable, the first temperature-sensing magnetic generator detector, the second temperature-sensing cable, and the second temperature-sensing magnetic generator detector are all communicatively connected to the fire control panel to determine whether there is a fire in the electrical cabinet and battery box based on the first temperature signal, the second temperature signal, the third temperature signal, and the fourth temperature signal. The fire controller is communicatively connected to the fire extinguishing cylinders in the electrical cabinet and the battery box, so as to control the opening and closing of the fire extinguishing cylinders in the electrical cabinet or the battery box when there is a fire.

[0007] Furthermore, the fire extinguishing pipeline is equipped with a first normally open pipeline solenoid valve, a first normally closed pipeline solenoid valve, a second normally closed pipeline solenoid valve, and a second normally open pipeline solenoid valve. The first normally open pipeline solenoid valve is installed between the fire extinguishing cylinder in the electrical cabinet and the sprinkler head in the electrical cabinet; the second normally open pipeline solenoid valve is installed between the fire extinguishing cylinder in the battery box and the sprinkler head in the battery box. The first normally closed pipeline solenoid valve is installed between the fire extinguishing cylinder in the electrical cabinet and the fire extinguishing cylinder in the battery box; the second normally closed pipeline solenoid valve is installed between the first normally closed pipeline solenoid valve and the fire extinguishing cylinder in the battery box. The first normally open pipeline solenoid valve, the first normally closed pipeline solenoid valve, the second normally closed pipeline solenoid valve, and the second normally open pipeline solenoid valve are all connected to the fire control controller.

[0008] Furthermore, the methods used to start and stop the fire extinguishing cylinders in the control cabinet and the battery box are as follows: When a fire occurs inside the electrical cabinet, if the fire extinguishing cylinder in the electrical cabinet is not faulty, close the second normally closed solenoid valve and the second normally open solenoid valve, and simultaneously open the first normally open solenoid valve and the first normally closed solenoid valve. Then, start the fire extinguishing cylinder in the electrical cabinet. At this time, the extinguishing medium in the fire extinguishing cylinder will extinguish the fire inside the electrical cabinet through the extinguishing pipeline and the electrical cabinet nozzle. If the fire extinguishing cylinder in the electrical cabinet is faulty, open the first normally open solenoid valve, the first normally closed solenoid valve, and the second normally closed solenoid valve, close the second normally open solenoid valve, and start the battery box fire extinguishing cylinder. At this time, the extinguishing medium in the battery box fire extinguishing cylinder will extinguish the fire inside the electrical cabinet through the extinguishing pipeline and the electrical cabinet nozzle. When a fire occurs inside the battery box, if the battery box fire extinguishing cylinder is not faulty, close the first normally open solenoid valve and the first normally closed solenoid valve, and simultaneously open the second normally closed solenoid valve and the second normally open solenoid valve. Then, activate the battery box fire extinguishing cylinder to extinguish the fire inside the battery box through the battery box nozzles. If the battery box fire extinguishing cylinder is faulty, open the first normally closed solenoid valve, the second normally closed solenoid valve, and the second normally open solenoid valve, close the first normally open solenoid valve, and activate the electrical cabinet fire extinguishing cylinder. In this case, the extinguishing medium in the electrical cabinet fire extinguishing cylinder will extinguish the fire inside the battery box through the fire extinguishing pipeline and the battery box nozzles.

[0009] Furthermore, the second temperature-sensing magnetic power generation detector moves circumferentially along the battery box via the temperature-sensing magnetic power generation moving part; The moving part of the thermo-magnetic generator includes a fixed plate, a cylindrical tube, and a slider; The bottom of the second temperature-sensing magnetic power generation detector is fixedly connected to the top of the fixed plate; One end of the cylindrical tube is fixedly disposed at the bottom of the fixing plate, and the axis of the cylindrical tube is perpendicular to the fixing plate; The fixing plate is provided with a first cable passage hole coaxial with the cylindrical tube; The slider is fixedly mounted on the other end of the cylindrical tube; the slider is provided with a second cable passage hole coaxial with the cylindrical tube. The inner wall of the battery box is fixedly provided with a slot that runs along the circumference of the battery box; The slider is disposed inside the slot and can move along the slot so that the second temperature-sensing magnetic power generation detector can move circumferentially along the battery box.

[0010] Furthermore, the slot includes a bottom and two side walls; The bottom of the tank is fixedly connected to the inner wall of the battery box; A slot top wall is provided on the side of the sidewall away from the bottom of the slot; the slot top walls corresponding to the two sidewalls form a slot; The cylindrical tube is connected to the fixed plate and the slider respectively through bayonet joints; Several cable clamps are fixedly installed on the side wall; the drive cable is arranged around the battery box through several cable clamps, and the drive cable can move along the slot. The slider has two symmetrically arranged grooves; a cable fixing clip is fixedly installed inside the groove to fix the drive cable. When the drive cable moves along the slot, the slider can move along the slot with the drive cable; and the cable clamp can pass through the cable clamp as the slider moves.

[0011] Furthermore, the inner diameter of the cable clamp is larger than the outer diameter of the cable fixing clamp.

[0012] Furthermore, a plurality of cable channels are provided on the bottom of the channel; temperature-sensing magnetic power generation signal lines are provided in the cable channels; The wires of the second temperature-sensing magnetic power generation detector pass through the first cable through hole, the cylindrical tube, and the second cable through hole in sequence, and are electrically connected to the temperature-sensing magnetic power generation signal line through a brush; The temperature-sensing magnetic power generation signal line is communicatively connected to the fire controller, and the fire controller is communicatively connected to the fire extinguishing cylinder in the battery box.

[0013] Beneficial Effects: This invention provides a fire prevention and control system for urban rail transit vehicles. It utilizes a single fire extinguishing pipeline and fire controller to achieve integrated prevention and control management of electrical cabinets and battery boxes within the vehicles. Simultaneously, the invention employs both temperature-sensing cables and temperature-sensing magnetic generator detectors for detection, enabling timely detection of fire information and rapid fire suppression in the event of a fire. This protects public health and safety, reduces vehicle and equipment property damage, and enhances the safety of train operation. Considering the fire hazards and dimensions of urban rail vehicles, this invention effectively controls fires in their early stages, better protecting personnel and equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the fire prevention and control system for urban rail transit vehicles according to the present invention; Figure 2 This is a schematic diagram of the layout of the battery box fire prevention system in an embodiment of the present invention; Figure 3 This is a schematic diagram of the installation of the temperature-sensing magnetic power generation detector in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the temperature-sensing magnetic power generation moving part in an embodiment of the present invention; Figure 5 This is a front view schematic diagram of the structure of the temperature-sensing magnetic power generation moving part in an embodiment of the present invention; Figure 6 This is a schematic diagram of the slider structure in an embodiment of the present invention; Figure 7 This is a schematic diagram of the card slot structure in an embodiment of the present invention; Figure 8 This is a schematic diagram of the liquid level feedback device in an embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] This embodiment describes a fire prevention and control system for urban rail transit vehicles, such as... Figures 1-8 As shown, it includes: electrical cabinet 1, battery box 2, fire controller; it also includes fire extinguishing pipeline 3, electrical cabinet fire extinguishing cylinder 4, electrical cabinet sprinkler head 5, battery box fire extinguishing cylinder 6, and battery box sprinkler head 7. The two ends of the fire extinguishing pipeline 3 are respectively connected to the electrical cabinet sprinkler head 5 and the battery box sprinkler head 7; the electrical cabinet sprinkler head 5 and the battery box sprinkler head 7 are respectively installed in appropriate positions inside the electrical cabinet 1 and the battery box 2. The fire extinguishing cylinder 4 in the electrical cabinet and the fire extinguishing cylinder 6 in the battery box are both connected to the fire extinguishing pipeline 3. The electrical cabinet 1 is equipped with a first temperature sensing cable and a first temperature sensing magnetic power generation detector, which are used to collect the first temperature signal and the second temperature signal inside the electrical cabinet, respectively. The battery box 2 is equipped with a second temperature sensing cable and a second temperature sensing magnetic generator, which are used to collect the third temperature signal and the fourth temperature signal inside the battery box, respectively. The first temperature-sensing cable, the first temperature-sensing magnetic generator detector, the second temperature-sensing cable, and the second temperature-sensing magnetic generator detector 8 are all communicatively connected to the fire control panel to determine whether there is a fire in the electrical cabinet and battery box based on the first temperature signal, the second temperature signal, the third temperature signal, and the fourth temperature signal. The fire controller is communicatively connected to the fire extinguishing cylinder 4 in the electrical cabinet and the fire extinguishing cylinder 6 in the battery box, so as to control the opening and closing of the fire extinguishing cylinder 4 in the electrical cabinet or the fire extinguishing cylinder 6 in the battery box when there is a fire in the electrical cabinet or the battery box.

[0018] Preferably, the fire extinguishing pipeline 3 is equipped with a first normally open pipeline solenoid valve 31, a first normally closed pipeline solenoid valve 32, a second normally closed pipeline solenoid valve 33, and a second normally open pipeline solenoid valve 34. The first normally open pipeline solenoid valve 31 is located between the fire extinguishing cylinder 4 and the nozzle 5 of the electrical cabinet; the second normally open pipeline solenoid valve 34 is located between the fire extinguishing cylinder 6 and the nozzle 7 of the battery box. The first normally closed pipeline solenoid valve 32 is located between the fire extinguishing cylinder 4 in the electrical cabinet and the fire extinguishing cylinder 6 in the battery box; the second normally closed pipeline solenoid valve 33 is located between the first normally closed pipeline solenoid valve 32 and the fire extinguishing cylinder 6 in the battery box. The first normally open pipeline solenoid valve 31, the first normally closed pipeline solenoid valve 32, the second normally closed pipeline solenoid valve 33, and the second normally open pipeline solenoid valve 34 are all connected to the fire controller for communication.

[0019] In this embodiment, the method used to determine whether there is a fire inside the electrical cabinet and battery box is as follows: When the first temperature signal is greater than the set first temperature alarm threshold, or the second temperature signal is greater than the set second temperature alarm threshold, a fire is confirmed to exist inside the electrical cabinet. When the third temperature signal exceeds the set first temperature alarm threshold, or the fourth temperature signal exceeds the set second temperature alarm threshold, a fire is confirmed to exist inside the battery box.

[0020] Preferably, the method used to control the starting and stopping of the fire extinguishing cylinder 4 in the electrical cabinet and the fire extinguishing cylinder 6 in the battery box is as follows: When a fire occurs inside the electrical cabinet, if the fire extinguishing cylinder 4 in the electrical cabinet is not faulty, close the second normally closed solenoid valve 33 and the second normally open solenoid valve 34, and simultaneously open the first normally open solenoid valve 31 and the first normally closed solenoid valve 32. Then, start the fire extinguishing cylinder 4 in the electrical cabinet. At this time, the extinguishing medium in the fire extinguishing cylinder 4 extinguishes the fire inside the electrical cabinet through the fire extinguishing pipeline 3 and the electrical cabinet nozzle 5. If the fire extinguishing cylinder 4 in the electrical cabinet is faulty, open the first normally open solenoid valve 31, the first normally closed solenoid valve 32, and the second normally closed solenoid valve 33, close the second normally open solenoid valve 34, and start the battery box fire extinguishing cylinder 6. At this time, the extinguishing medium in the battery box fire extinguishing cylinder 6 extinguishes the fire inside the electrical cabinet through the fire extinguishing pipeline 3 and the electrical cabinet nozzle 5. When a fire occurs inside the battery box, if the battery box fire extinguishing cylinder 6 is not faulty, close the first normally open pipeline solenoid valve 31 and the first normally closed pipeline solenoid valve 32, and simultaneously open the second normally closed pipeline solenoid valve 33 and the second normally open pipeline solenoid valve 34. Then, start the battery box fire extinguishing cylinder 6 and extinguish the fire inside the battery box through the battery box nozzle 7. If the battery box fire extinguishing cylinder 6 is faulty, open the first normally closed pipeline solenoid valve 32, the second normally closed pipeline solenoid valve 33, and the second normally open pipeline solenoid valve 34, close the first normally open pipeline solenoid valve 31, and start the electrical cabinet fire extinguishing cylinder 4. At this time, the extinguishing medium in the electrical cabinet fire extinguishing cylinder 4 extinguishes the fire inside the battery box through the fire extinguishing pipeline 3 and the battery box nozzle 7.

[0021] Specifically, the system needs to protect the entire train's electrical cabinets and undercarriage battery boxes. When a fire occurs inside the electrical cabinet, if the first temperature signal collected by the first temperature sensing cable exceeds the set first temperature alarm threshold, the first temperature sensing cable short-circuits, the circuit closes, and an electrical signal is generated. Upon receiving the electrical signal, the fire controller activates the electrical cabinet fire extinguishing cylinder 4 to extinguish the fire. If the second temperature signal collected by the first temperature sensing magnetic generator exceeds the set second temperature alarm threshold, the first temperature sensing magnetic generator activates, generating an electrical signal. Upon receiving the signal from the electrical cabinet temperature sensing magnetic generator, the fire controller activates the electrical cabinet fire extinguishing cylinder 4 to extinguish the fire. If the driver discovers a fire inside the electrical cabinet, he sends a signal to the fire controller through the vehicle control system. Upon receiving the electrical signal, the fire controller directly activates the electrical cabinet fire extinguishing cylinder 4 to extinguish the fire. In this embodiment, the above three activation methods are in the form of OR, and satisfying any one of them is sufficient to extinguish the fire in the electrical cabinet.

[0022] When a fire occurs inside the battery box, if the third temperature signal collected by the second temperature sensing cable exceeds the set first temperature alarm threshold, the second temperature sensing cable short-circuits, the circuit closes, and an electrical signal is generated in the circuit. Upon receiving the electrical signal, the fire controller activates the battery box fire extinguishing cylinder 6 to extinguish the fire. If the fourth temperature signal collected by the second temperature sensing magnetic generator exceeds the set second temperature alarm threshold, the second temperature sensing magnetic generator activates, generating an electrical signal. The fire controller receives the battery box temperature sensing magnetic generator feedback signal and activates the battery box fire extinguishing cylinder 6 to extinguish the fire. If the driver discovers a fire, they send a signal to the fire controller through the vehicle control system. Upon receiving the electrical signal, the fire controller activates the battery box fire extinguishing cylinder 6 to extinguish the fire. Alternatively, if the BMS detects a fire, it sends a signal to the fire controller, which then activates the battery box fire extinguishing cylinder 6 to extinguish the fire. In this embodiment, the above four activation methods are in an OR form; satisfying any one of them is sufficient to extinguish the fire.

[0023] In this embodiment, the fire extinguishing system uses a shared fire extinguishing pipeline between the electrical cabinet and the battery box, connected by a single fire extinguishing pipeline. A normally closed solenoid valve is installed on the fire extinguishing pipeline near both the electrical cabinet and battery boxes. A normally open solenoid valve is installed between the fire extinguishing cylinder and the electrical cabinet, and between the fire extinguishing cylinder and the battery box. This design ensures timely fire extinguishing even if either the fire extinguishing cylinder 4 in the electrical cabinet or the fire extinguishing cylinder 6 in the battery box malfunctions.

[0024] Preferably, the second temperature-sensing magnetic power generation detector 8 moves circumferentially along the battery box 2 via the temperature-sensing magnetic power generation moving part 9; The temperature-sensitive magnetic power generation moving part 9 includes a fixed plate 91, a cylindrical tube 93, and a slider 94; The bottom of the second temperature-sensing magnetic power generation detector 8 is fixedly connected to the top of the fixing plate 91; One end of the cylindrical tube 93 is fixedly disposed at the bottom of the fixing plate 91, and the axis of the cylindrical tube 93 is perpendicular to the fixing plate 91; The fixing plate 91 is provided with a first cable passage hole 92 that is coaxial with the cylindrical tube 93; The slider 94 is fixedly disposed at the other end of the cylindrical tube 93; the slider 94 is provided with a second cable passage hole 941 coaxial with the cylindrical tube 93; The inner wall surface of the battery box 2 is fixedly provided with a slot 21 arranged along the circumference of the battery box 2; The slider 94 is disposed inside the slot 21 and can move along the slot 21 so that the second temperature-sensing magnetic power generation detector 8 can move around the battery box 2 to realize all-round detection of the inside of the battery box 2.

[0025] Preferably, the slot 21 includes a slot bottom 211 and two side walls 212; The bottom of the tank 211 is fixedly connected to the inner wall of the battery box 2; A slot top wall 213 is provided on the side of the side wall 212 away from the bottom of the slot 211; the slot top walls 213 corresponding to the two side walls 212 form a slot 214; The cylindrical tube 93 is connected to the fixed plate 91 and the slider 94 respectively through the bayonet 214; A plurality of cable clamps 215 are fixedly provided on the side wall 212; the drive cable 944 is arranged around the battery box 2 through the plurality of cable clamps 215, and the drive cable 944 can move along the slot 21. The slider 94 is provided with two symmetrically arranged grooves 942; a cable fixing clip 943 is fixedly arranged inside the groove 942 to fix the drive cable 944. When the drive cable 944 moves along the slot 21, the slider 94 can move along the slot 21 with the drive cable; and the cable clamp 943 can pass through the cable clamp 215 as the slider 94 moves, so that the slider 94 can move within the slot 21.

[0026] Preferably, the inner diameter of the cable clamp 215 is larger than the outer diameter of the cable fixing clamp 943.

[0027] In this embodiment, the wall surface of the cable fixing clamp 943 perpendicular to the moving direction of the drive cable 944 is provided with a first chamfer; the two side walls of the cable clamp 215 perpendicular to the moving direction of the drive cable 944 are provided with a second chamfer corresponding to the first chamfer; so that the cable fixing clamp 943 can smoothly pass through the cable clamp 215 as the slider 94 moves.

[0028] Preferably, a plurality of cable troughs 2111 are provided on the bottom 211 of the trough; a temperature-sensing magnetic power generation signal line is provided in the cable trough 2111; The wires of the second temperature-sensing magnetic power generation detector 8 pass through the first cable through hole 92, the cylindrical tube 93, and the second cable through hole 941 in sequence, and are electrically connected to the temperature-sensing magnetic power generation signal line through the brush 96. The temperature-sensing magnetic power generation signal line is communicatively connected to the fire controller, and the fire controller is communicatively connected to the fire extinguishing cylinder 6 in the battery box.

[0029] Specifically, the temperature-sensing magnetic generator detector is a novel temperature-activated device that generates an electrical signal by sensing changes in ambient temperature. When the ambient temperature exceeds a preset temperature, the thermistor ring deforms and releases the spring-loaded moving rod. Under the action of the spring, a magnet fixed to the moving rod passes through the induction coil, causing the coil to generate an electrical signal.

[0030] The second temperature-sensitive magnetic generator detector moves along a slot on the edge of the battery box via a slider. Its connecting wire is connected in real time to the temperature-sensitive magnetic generator signal line inside the battery box slot via a brush. When the battery box BMS detects a localized high temperature in the battery, it quickly generates an electrical signal upon reaching the alarm temperature. This signal is transmitted to the fire controller via the temperature-sensitive magnetic generator signal line, which then activates the fire extinguishing cylinder for rapid fire suppression, achieving a better fire extinguishing effect. In this embodiment, the movement of the first temperature-sensitive magnetic generator detector within the electrical cabinet is the same as that of the second temperature-sensitive magnetic generator detector within the battery box. The slider is connected to the drive cable 944 via a cable clamp 943. When the drive cable 944 moves, the slider slides freely within the battery box slot. The cable clamp 943 is connected to the slider via bolts, using the elastic deformation generated during bolt tightening to clamp the cable. The drive cable 944 changes direction at the corner of the battery box via cable clamp 215. The edges of the cable fixing clamp 943 and the cable clamp 215 have a 60° chamfer, so that the cable fixing clamp 943 can smoothly pass through the cable clamp 215 at the corner of the battery box.

[0031] In this embodiment, two electric reels 201 are installed on the battery box to drive the movement of the drive cable 944. The electric reels are equipped with time relays 202. After the battery box BMS confirms the high temperature position, the fire controller converts the position information into cable length information based on the distance that the temperature-sensing magnetic generator needs to slide to this position. Then, based on the rotation speed of the electric reel, the cable length information is converted into time information, and the position of the temperature-sensing magnetic generator is controlled by the time relay.

[0032] In this embodiment, the fire extinguishing cylinder mainly consists of a gas generating assembly, a shell assembly, and a liquid level feedback device, and is installed on the side of the cabinet. The gas generating assembly mainly consists of a resistance wire, gunpowder, and aerosol. When a trigger signal is received, the resistance wire in the electric initiator heats up, igniting the gunpowder outside the resistance wire, and the internal temperature rises rapidly, igniting the aerosol. The gas generated after the aerosol burns enters the shell, increasing the internal pressure. Under the pressure difference, the diaphragm at the cylinder opening is pushed open, and the fire extinguishing medium inside the shell is ejected from the cylinder. The shell adopts an integrated design of outer shell and support, which can effectively reduce the weight of the equipment. The liquid level feedback device is a float type, and the circuit on / off can be changed by the height of the float. When the cylinder leaks, as the fire extinguishing medium decreases, the float position gradually decreases. When the distance D between the upper surface of the float and the top of the sliding rod is greater than a set value, the circuit is disconnected and a liquid level alarm signal is sent.

[0033] In this embodiment, the fire extinguishing pipeline is made of stainless steel and is connected to the fire extinguishing cylinder via a locking nut. After the fire extinguishing cylinder is activated, the extinguishing medium flows through the pipeline to the nozzle. The nozzle is a high-flow-rate atomizing nozzle installed at the other end of the pipeline, which can spray the extinguishing medium in atomized form in a short time.

[0034] In this implementation, a non-resettable constant-temperature sensing cable is used, comprising a signal processor, a terminal processor, and internal cables. The sensing cable is arranged in an S-shape around the electrical modules in the electrical cabinet / battery box, and is fixed by cable ties inside the cabinet, with its placement as close as possible to the electrical modules being tested.

[0035] This invention enables fire prevention and control in critical areas of urban rail transit vehicles. Specifically, it provides a complete fire prevention and control solution for vehicles through fire suppression systems in the electrical cabinets and battery boxes of urban rail vehicles, ensuring the safe operation of vehicles and the safety of people's lives and health.

[0036] This invention enables fire prevention and control of electrical cabinets and battery boxes in rail transit vehicles. In the event of a fire, the system utilizes a shared fire suppression management system to quickly extinguish the fire using fire extinguishing cylinders in both cabinets, maximizing the use of these cylinders for better fire suppression results. The invention employs a temperature-sensitive magnetic generator detector that generates electricity through electromagnetic induction. The fire extinguishing cylinders are discharged based on the electrical signal generated by the temperature-sensitive magnetic generator, ensuring the fire prevention and control system continues to function normally even during power outages.

[0037] When the BMS of this invention detects a fire, it enables the temperature-sensing magnetic generator detector to quickly move to the target location. Upon reaching the alarm temperature, it rapidly activates to generate an electrical signal. This signal, transmitted through a wire, activates the fire extinguishing cylinder, reducing the cylinder's activation time and achieving a better fire suppression effect. The fire extinguishing cylinder of this invention, equipped with a liquid level feedback function, can promptly detect leaks, eliminating the potential hazard of fires being unable to be extinguished due to cylinder leakage.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fire prevention and control system for urban rail transit vehicles, characterized in that, include: Electrical cabinet (1), battery box (2), fire controller; also includes fire extinguishing pipeline (3), electrical cabinet fire extinguishing cylinder (4), electrical cabinet sprinkler head (5), battery box fire extinguishing cylinder (6), battery box sprinkler head (7); The two ends of the fire extinguishing pipeline (3) are connected to the electrical cabinet nozzle (5) and the battery box nozzle (7) respectively; the electrical cabinet nozzle (5) and the battery box nozzle (7) are respectively installed inside the electrical cabinet (1) and the battery box (2); The fire extinguishing cylinder (4) in the electrical cabinet and the fire extinguishing cylinder (6) in the battery box are both connected to the fire extinguishing pipeline (3); The electrical cabinet (1) is equipped with a first temperature sensing cable and a first temperature sensing magnetic power generation detector, which are used to collect the first temperature signal and the second temperature signal inside the electrical cabinet, respectively. The battery box (2) is equipped with a second temperature sensing cable and a second temperature sensing magnetic generator, which are used to collect the third temperature signal and the fourth temperature signal inside the battery box, respectively. The first temperature-sensing cable, the first temperature-sensing magnetic generator detector, the second temperature-sensing cable, and the second temperature-sensing magnetic generator detector are all communicatively connected to the fire control panel to determine whether there is a fire in the electrical cabinet and battery box based on the first temperature signal, the second temperature signal, the third temperature signal, and the fourth temperature signal. The fire controller is communicatively connected to the fire extinguishing cylinder (4) in the electrical cabinet and the fire extinguishing cylinder (6) in the battery box, so as to control the opening and closing of the fire extinguishing cylinder (4) in the electrical cabinet or the fire extinguishing cylinder (6) in the battery box when there is a fire in the electrical cabinet or the battery box.

2. The fire prevention and control system for urban rail transit vehicles according to claim 1, characterized in that, The fire extinguishing pipeline (3) is equipped with a first normally open pipeline solenoid valve (31), a first normally closed pipeline solenoid valve (32), a second normally closed pipeline solenoid valve (33), and a second normally open pipeline solenoid valve (34). The first normally open pipeline solenoid valve (31) is located between the fire extinguishing cylinder (4) in the electrical cabinet and the nozzle (5) in the electrical cabinet; the second normally open pipeline solenoid valve (34) is located between the fire extinguishing cylinder (6) in the battery box and the nozzle (7) in the battery box. The first normally closed pipeline solenoid valve (32) is located between the fire extinguishing cylinder (4) in the electrical cabinet and the fire extinguishing cylinder (6) in the battery box; the second normally closed pipeline solenoid valve (33) is located between the first normally closed pipeline solenoid valve (32) and the fire extinguishing cylinder (6) in the battery box. The first normally open pipeline solenoid valve (31), the first normally closed pipeline solenoid valve (32), the second normally closed pipeline solenoid valve (33), and the second normally open pipeline solenoid valve (34) are all connected to the fire controller for communication.

3. A fire prevention and control system for urban rail transit vehicles according to claim 2, characterized in that, The methods used for starting and stopping the fire extinguishing cylinder (4) in the control electrical cabinet and the fire extinguishing cylinder (6) in the battery box are as follows: When there is a fire inside the electrical cabinet, if the electrical cabinet fire extinguishing cylinder (4) is not faulty, close the second normally closed pipeline solenoid valve (33) and the second normally open pipeline solenoid valve (34), and open the first normally open pipeline solenoid valve (31) and the first normally closed pipeline solenoid valve (32). Then start the electrical cabinet fire extinguishing cylinder (4). At this time, the fire extinguishing medium in the electrical cabinet fire extinguishing cylinder (4) extinguishes the fire inside the electrical cabinet through the fire extinguishing pipeline (3) and the electrical cabinet nozzle (5). If there is a fault in the electrical cabinet fire extinguishing cylinder (4), open the first normally open pipeline solenoid valve (31), the first normally closed pipeline solenoid valve (32), and the second normally closed pipeline solenoid valve (33), close the second normally open pipeline solenoid valve (34), and start the battery box fire extinguishing cylinder (6). At this time, the fire extinguishing medium in the battery box fire extinguishing cylinder (6) extinguishes the fire inside the electrical cabinet through the fire extinguishing pipeline (3) and the electrical cabinet nozzle (5). When there is a fire in the battery box, if the battery box fire extinguishing cylinder (6) is not faulty, close the first normally open pipeline solenoid valve (31) and the first normally closed pipeline solenoid valve (32), and at the same time open the second normally closed pipeline solenoid valve (33) and the second normally open pipeline solenoid valve (34), and then start the battery box fire extinguishing cylinder (6) to extinguish the fire inside the battery box through the battery box nozzle (7); if the battery box fire extinguishing cylinder (6) is faulty, open the first normally closed pipeline solenoid valve (32), the second normally closed pipeline solenoid valve (33), and the second normally open pipeline solenoid valve (34), and at the same time close the first normally open pipeline solenoid valve (31), and start the electrical cabinet fire extinguishing cylinder (4). At this time, the fire extinguishing medium in the electrical cabinet fire extinguishing cylinder (4) extinguishes the fire inside the battery box through the fire extinguishing pipeline (3) and the battery box nozzle (7).

4. A fire prevention and control system for urban rail transit vehicles according to claim 1, characterized in that, The second temperature-sensitive magnetic power generation detector (8) moves circumferentially along the battery box (2) via the temperature-sensitive magnetic power generation moving part (9); The temperature-sensitive magnetic power generation moving part (9) includes a fixed plate (91), a cylindrical tube (93), and a slider (94); The bottom of the second temperature-sensing magnetic power generation detector (8) is fixedly connected to the top of the fixing plate (91); One end of the cylindrical tube (93) is fixedly disposed at the bottom of the fixing plate (91), and the axis of the cylindrical tube (93) is perpendicular to the fixing plate (91). The fixing plate (91) is provided with a first cable passage hole (92) coaxial with the cylindrical tube (93); The slider (94) is fixedly disposed at the other end of the cylindrical tube (93); the slider (94) is provided with a second cable passage hole (941) coaxial with the cylindrical tube (93). The inner wall surface of the battery box (2) is fixedly provided with a slot (21) arranged along the circumference of the battery box (2); The slider (94) is disposed inside the slot (21), and the slider (94) can move along the slot (21) so that the second temperature-sensing magnetic power generation detector (8) can move circumferentially along the battery box (2).

5. A fire prevention and control system for urban rail transit vehicles according to claim 4, characterized in that, The slot (21) includes a bottom (211) and two side walls (212); The bottom of the tank (211) is fixedly connected to the inner wall of the battery box (2); A slot top wall (213) is provided on the side of the sidewall (212) away from the bottom of the slot (211); the slot top walls (213) corresponding to the two sidewalls (212) form a slot (214); The cylindrical tube (93) is connected to the fixed plate (91) and the slider (94) respectively through the bayonet (214); A number of cable clamps (215) are fixedly provided on the side wall (212); the drive cable (944) is arranged around the battery box (2) through the cable clamps (215), and the drive cable (944) can move along the slot (21); The slider (94) is provided with two symmetrically arranged grooves (942); a cable fixing clip (943) is fixedly arranged inside the groove (942) to fix the drive cable (944). When the drive cable (944) moves along the slot (21), the slider (94) can move along the slot (21) with the drive cable; and the cable clamp (943) can pass through the cable clamp (215) as the slider (94) moves.

6. A fire prevention and control system for urban rail transit vehicles according to claim 5, characterized in that, The inner diameter of the cable clamp (215) is larger than the outer diameter of the cable fixing clamp (943).

7. A fire prevention and control system for urban rail transit vehicles according to claim 5, characterized in that, A plurality of cable troughs (2111) are provided on the bottom (211) of the trough; a temperature-sensing magnetic power generation signal line is provided in the cable trough (2111); The wires of the second temperature-sensing magnetic power generation detector (8) pass through the first cable through hole (92), the cylindrical tube (93), and the second cable through hole (941) in sequence, and are electrically connected to the temperature-sensing magnetic power generation signal line through the brush (96); The temperature-sensing magnetic power generation signal line is connected to the fire controller, and the fire controller is connected to the fire extinguishing cylinder (6) in the battery box.

Images