Fire extinguishing system for electrical cabinet of train

Abstract

The invention provides a train electrical cabinet fire extinguishing system, a lower subsystem of the train electrical cabinet fire extinguishing system comprises a temperature detection system, a gas fire extinguishing device, a control system, a pipeline and a spray head, and the temperature detection device comprises a cable type temperature sensing detector and a temperature sensing magnetic power generation assembly. Once a fire disaster occurs after faults such as short circuit or overload occur in the electrical cabinet, workers cannot find the fire disaster in time, the gas fire extinguishing device is started to extinguish the fire automatically, the gas fire extinguishing device can still be started to extinguish the fire under the condition of power failure, automatic fire extinguishing is achieved through perfluorohexanone, perfluorohexanone is clean gas, volatile and free of residues, and the safety of the electrical cabinet is improved. The electrical cabinet is simple in structure and good in insulativity, a controller, a power source, a relay and other elements in the electrical cabinet can continue to be used after spraying, a liquid leakage detection mechanism is installed in the gas fire extinguishing device, an alarm signal can be sent through connection and disconnection of a circuit, and the capacity of a fire extinguishing agent is monitored in real time.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transportation, and in particular relates to a train electrical cabinet fire extinguishing system applied to rail transportation. Background Art

[0002] Although the electrical cabinets in rail transit can currently meet the fire protection requirements of rail vehicles, there is still a gap in fire extinguishing after a fire occurs. Once a fire occurs due to a short circuit or overload fault inside the electrical cabinet, the staff cannot discover it in time. Once the fire spreads rampantly, it will endanger the safety of the entire vehicle and even cause casualties and immeasurable economic losses. The patent provides a temperature-controlled automatic fire extinguishing system. When a fire occurs in the vehicle's electrical cabinet, the gas fire extinguishing device is activated to automatically extinguish the fire. Summary of the Invention

[0003] The purpose of the present invention is to solve the fire safety problem of vehicle electrical cabinets.

[0004] To achieve the above-mentioned objectives, the present invention provides a train electrical cabinet fire extinguishing system, whose subsystems include: a temperature detection system, a gas fire extinguishing device, a control system, pipelines and nozzles. The temperature detection device includes a cable-type temperature detector and a temperature-sensitive magnetic power generation component. The cable-type temperature detector and the temperature-sensitive magnetic power generation component are both located in the electrical cabinet. The cable-type temperature detector is wound in the electrical cabinet from top to bottom along with the cable and is always at the outermost side of the cable harness, so that the cable-type temperature detector can detect every space in the electrical cabinet. The gas fire extinguishing device is used to store fire extinguishing agent. The gas fire extinguishing device can be fixed horizontally or vertically in the electrical cabinet. The pipeline can be adjusted according to requirements. When a signal is received, the fire extinguishing agent is sprayed. The cable-type temperature detector and the gas fire extinguishing device in the temperature detection system are respectively connected to the control system. The temperature-sensitive magnetic power generation component in the temperature detection system is connected to the gas fire extinguishing device. One end of the pipeline is connected to the gas fire extinguishing device and the other end is connected to the nozzle.

[0005] Furthermore, the control system communicates with the train and is used to transmit the fire signal fed back by the temperature detection system received by the fire controller to the train and control the activation of the gas fire extinguishing device. At the same time, it receives feedback signals from the cable-type temperature detector and the temperature-sensitive magnetic power generation component, and is able to receive fire information and gas fire extinguishing device activation information. By clicking the start button of the train, the train sends a start command to the control system, and after receiving the command, the control system can trigger the gas fire extinguishing device at the corresponding position.

[0006] When the temperature detection system detects a fire, it generates current, and the current signal is converted and transmitted to the control system. The control system sends a command to close the relay switch and start the gas fire extinguishing device. After the gas fire extinguishing device is started, the fire extinguishing agent is sprayed from the nozzle along the pipeline for spraying. At the same time, the control system will receive the fire information and the device startup information; when the system is powered off, the cable-type temperature detector cannot work normally. If a fire occurs at this time, the temperature-sensitive magnetic power generation component in the temperature detection system will take effect. The temperature-sensitive magnetic power generation component generates current when heated, and the gas fire extinguishing device is started. After the gas fire extinguishing device is started, the fire extinguishing agent is sprayed from the nozzle along the pipeline for spraying. At the same time, the control system will receive the fire information and the device startup information.

[0007] When a fire occurs, the system can also be started manually. The staff operates the train's human-computer interaction screen and clicks the start button. The train sends a start command to the control system. After receiving the command, the controller can trigger the gas fire extinguishing device at the corresponding location.

[0008] Furthermore, an installation point is provided on the gas fire extinguishing device, which is fastened to the installation hole reserved in the electrical cabinet by bolts. The pipeline is connected to the gas fire extinguishing device by threads and fixed by a fixing clamp on the pipeline path. The pipeline finally extends to the center position of the top of the electrical cabinet, and the nozzle at the end of the pipeline is arranged downward.

[0009] Furthermore, a resistance wire is installed at one end of the gas fire extinguishing device and connected to an external circuit. The resistance wire is installed in an aerosol chamber. An aerosol is placed in the aerosol chamber. The aerosol chamber and the fire extinguishing agent chamber are separated by a diaphragm. A leakage detection mechanism and a pipeline are installed at the other end. The explosion venting disc is installed between the fire extinguishing agent chamber and the pipeline installation port.

[0010] When a trigger signal is received, the resistance wire heats up and ignites the initiator outside the resistance wire, causing the temperature inside the cavity to quickly ignite the aerosol. The gas generated after the aerosol burns enters the shell, increasing the pressure inside the shell. Under the action of the pressure difference, the explosion-proof plate at the bottle mouth is pushed open, and the fire extinguishing agent inside the shell is sprayed out from the nozzle through the pipeline.

[0011] Furthermore, the fire extinguishing agent in the fire extinguishing agent chamber is perfluorohexanone.

[0012] Furthermore, the leakage detection mechanism is installed inside the gas fire extinguishing device through a thread. When the fire extinguishing agent in the device leaks to a certain amount, a leakage signal is sent to the entire vehicle. The gas fire extinguishing device can be placed horizontally or vertically. When the gas fire extinguishing device is placed vertically, the leakage detection mechanism is connected to the gas fire extinguishing device through the thread at the end of the mechanism, and outputs a switching signal alarm. The leakage detection mechanism includes a float and a rod placed vertically in the fire extinguishing agent chamber. The circuit is changed by the height of the float. When the end face distance D between the float and the rod is less than a set value, the circuit is in an on state. As the liquid level inside the fire extinguishing device decreases, the distance between the float and the end face gradually increases. When the distance D between the float and the end face is greater than the set value, the circuit is disconnected and a liquid level alarm signal is sent;

[0013] When the gas fire extinguishing device is placed horizontally, the leakage detection mechanism is also connected to the gas fire extinguishing device through the thread at the end of the mechanism. The leakage detection mechanism includes a float and a rod placed horizontally in the fire extinguishing agent chamber. The circuit is changed by the angle between the float and the rod. When the angle between the float and the rod is less than a certain angle, the circuit is in the on state. As the liquid level inside the fire extinguishing device drops, the angle between the float and the rod gradually increases. When the angle between the float and the rod is greater than a certain angle, the circuit is disconnected and an alarm signal is sent.

[0014] Furthermore, the heat-sensitive insulating material of the cable-type temperature detector melts when heated, and the metal cores wrapped in the insulating material come into contact with each other, the circuit is connected, and current is generated.

[0015] Furthermore, the temperature-sensitive magnetic power generation assembly is a temperature-sensitive starting device. One end of the moving rod is fixed in the thermistor, and the moving rod passes through the spring and compresses it. When the thermistor senses the temperature and deforms, the moving rod is released. After the moving rod loses its fixation, under the action of the spring potential energy, the magnet at the other end of the moving rod can quickly pass through the coil at the bottom, and generate a pulse current using the principle of electromagnetic induction. The current passes through the resistance wire of the gas fire extinguishing device to heat itself, ignite the initiator outside the resistance wire, and quickly ignite the aerosol at the temperature in the cavity, starting the gas fire extinguishing device and feeding back a signal to the control system.

[0016] Furthermore, the cable-type temperature detector, control system, gas fire extinguishing device and leakage detection mechanism are connected through an electrical circuit. The train battery provides a 24V power supply, which has two contacts, namely 0V and 24V. After the power enters the system, it supplies power to the A1 contact of relay K2, the cable-type temperature detector, the control system and the leakage detection mechanism respectively. The cable-type temperature detector or the manual start control system is triggered to start relay K2, and the relay K2 switch is closed to turn on the gas fire extinguishing device. When relay K2 is triggered, it will synchronously send a start signal to the control system, which is sent to the train by the control system. A leakage detection mechanism is provided inside the gas fire extinguishing device. When the sensor is triggered, the A1 contact of relay K1 is energized and a leakage signal is sent to the controller. All power supply devices are eventually connected to the battery 0V circuit through the 0V power supply.

[0017] Furthermore, the temperature-sensitive magnetic power generation component, gas fire extinguishing device, and control system are connected through an electrical circuit. When the system is powered off, the temperature-sensitive magnetic power generation component is heated to generate current, which starts the gas fire extinguishing device. It can be used as a power source to directly supply power to the devices in the gas fire extinguishing device and output a fire signal to the entire vehicle through the control system.

[0018] Through the fire extinguishing system of the present invention, once a fire occurs due to a short circuit or overload fault inside the electrical cabinet, the staff cannot discover it in time, and the gas fire extinguishing device is activated to automatically extinguish the fire. The gas fire extinguishing device can still be activated to extinguish the fire in the event of a power outage. The automatic fire extinguishing is achieved by using perfluorohexanone. Perfluorohexanone is a clean gas that is volatile, has no residue, and has good insulation properties. After spraying, the controller, power supply, relay and other components in the electrical cabinet can continue to be used. The gas fire extinguishing device is equipped with a leakage detection mechanism, which can send an alarm signal by connecting and disconnecting the circuit, and monitor the fire extinguishing agent capacity in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to clearly illustrate the technical solution of the present invention, a specific solution will be described below.

[0020] Figure 1 This is a schematic diagram of the components and connections of the train electrical cabinet fire extinguishing system of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection structure between the gas fire extinguishing device and the electrical cabinet in the train electrical cabinet fire extinguishing system of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the horizontal gas fire extinguishing device of the present invention;

[0023] Figure 4 Schematic diagram of the liquid leakage detection mechanism of the horizontal gas fire extinguishing device of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the vertical gas fire extinguishing device of the present invention;

[0025] Figure 6 Schematic diagram of the liquid leakage detection mechanism of the vertical gas fire extinguishing device of the present invention;

[0026] Figure 7 This is a schematic structural diagram of the cable-type temperature detector of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the temperature-sensitive magnetic power generation component of the present invention;

[0028] Figure 9 This is a schematic diagram of the working logic of the train electrical cabinet fire extinguishing system of the present invention;

[0029] Figure 10 This is a schematic diagram of the electrical installation structure of the system of the present invention.

[0030] In the figure: 1-gas fire extinguishing device; 101-resistance wire; 102-aerosol chamber; 103-diaphragm; 104-explosion venting disc; 105-fire extinguishing agent chamber; 2-mounting hole; 3-electrical cabinet; 4-pipeline; 5-sprinkler; 6-pipeline mounting head; 7-leakage detection mechanism; 701-float; 702-rod; 703-float; 704-end; 705-end face; 8-cable type temperature detector; 801-metal wire; 802-thermosensitive insulating material; 9-temperature sensitive magnetic power generation component; 901-thermosensitive element; 902-moving rod; 903-spring; 904-magnet; 905-induction coil. DETAILED DESCRIPTION

[0031] To illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be explained below with reference to the accompanying drawings. Obviously, what is described herein are only some examples, not all examples.

[0032] The present invention provides a train electrical cabinet fire extinguishing system which does not cause secondary damage to control systems, electrical components and other electrical equipment in the electrical cabinet after the action of a fire extinguishing agent and is free of cleaning.

[0033] The system of the present invention includes a temperature detection system, a gas fire extinguishing device 1, a control system, a pipeline 4 and a nozzle 5; the temperature detection device includes a cable-type temperature detector 8 and a temperature-sensitive magnetic power generation component 9, and the cable-type temperature detector 8 and the temperature-sensitive magnetic power generation component 9 are both located in the electrical cabinet 3. The cable-type temperature detector 8 is wound in the electrical cabinet 3 from top to bottom with the cable and is always at the outermost side of the cable harness, so that the cable-type temperature detector 8 can detect every space in the electrical cabinet 3. The gas fire extinguishing device 1 is used to store fire extinguishing agent. The gas fire extinguishing device 1 can be fixed horizontally or vertically in the electrical cabinet 3. The pipeline 4 can be adjusted according to requirements and sprays the fire extinguishing agent when a signal is received; the cable-type temperature detector 8 and the gas fire extinguishing device 1 in the temperature detection system are respectively connected to the control system, and the temperature-sensitive magnetic power generation component 9 in the temperature detection system is connected to the gas fire extinguishing device 1. One end of the pipeline 4 is connected to the gas fire extinguishing device 1, and the other end is connected to the nozzle 5.

[0034] As a further improvement of the present invention, the system can monitor and extinguish fires both when there is power and when there is no power.

[0035] As a further improvement of the present invention, the gas fire extinguishing device 1 is at normal pressure in a normal state.

[0036] As a further improvement of the present invention, the fire extinguishing agent adopts perfluorohexanone.

[0037] The following drawings schematically illustrate the basic concept of the present invention. The specific shape, dosage, installation method and layout will be adjusted according to actual conditions.

[0038] Reference Figure 1 The control system needs the train to power it, the control system communicates with the entire vehicle, the fire controller receives the fire signal fed back by the temperature detection system, and uploads the fire alarm signal to the train to control the activation of the gas fire extinguishing device 1. The control system is used to upload the fire signal fed back by the temperature detection system received by the fire controller to the train, and control the activation of the gas fire extinguishing device. At the same time, it receives feedback signals from the cable-type temperature detector 8 and the temperature-sensitive magnetic power generation component 9, and can receive fire information and gas fire extinguishing device activation information. By clicking the start button of the train, the train sends a start instruction to the control system. After receiving the instruction, the control system can trigger the gas fire extinguishing device 1 at the corresponding position;

[0039] When the temperature detection system detects a fire, it generates current, and the current signal is converted and transmitted to the control system. The control system sends a command to close the relay switch and start the gas fire extinguishing device 1. After the gas fire extinguishing device 1 is started, the fire extinguishing agent is sprayed from the nozzle 5 along the pipeline 4 to spray. At the same time, the control system will receive the fire information and the device startup information; when the system is powered off, the cable-type temperature detector 8 cannot work normally. If a fire occurs at this time, the temperature-sensitive magnetic power generation component 9 in the temperature detection system will take effect. The temperature-sensitive magnetic power generation component 9 generates current when heated, and the gas fire extinguishing device is started. After the gas fire extinguishing device 1 is started, the fire extinguishing agent is sprayed from the nozzle 5 along the pipeline 4 to spray. At the same time, the control system will receive the fire information and the device startup information.

[0040] When a fire occurs, the system can also be started manually. The staff operates the human-computer interaction screen of the train and clicks the start button. The train sends a start instruction to the control system. After receiving the instruction, the control system can trigger the gas fire extinguishing device 1 at the corresponding position.

[0041] The control system is generally installed in the electrical cabinet 3, and can also be installed in other locations according to the actual situation of the train. The functions implemented by the control system are well-known technical content for those skilled in the art, and there is no unclear situation. Any control system that implements the functional limitations of the patent of this invention is applicable and is within the scope of protection of the patent of this invention. It is not possible to obtain protection by deriving another technical solution from the difference in shape characteristics or structural composition.

[0042] Reference Figure 2 , which is a vertical gas fire extinguishing device 1 installed on the side of the electrical cabinet 3 (the same applies to the horizontal gas fire extinguishing device). There is a mounting point on the gas fire extinguishing device 1, which is fastened to the mounting hole 2 reserved in the electrical cabinet 3 by bolts. The pipeline 4 is connected to the gas fire extinguishing device 1 by a threaded connection and is fixed on the path of the pipeline 4 by a pipeline mounting head 6. The pipeline 4 finally extends to the center position of the top of the electrical cabinet 3, and the nozzle 5 at the end of the pipeline 4 is arranged downward.

[0043] Reference Figures 3 to 6 The gas fire extinguishing device 1 is an important component of the present invention. A leakage detection mechanism 7 is installed inside the gas fire extinguishing device 1. The leakage detection mechanism 7 is installed inside the gas fire extinguishing device 1 through a threaded connection. When the fire extinguishing agent in the device leaks to a certain amount, a leakage signal is sent to the entire vehicle.

[0044] A resistance wire 101 is installed at one end of the gas fire extinguishing device 1 and is connected to an external circuit. The resistance wire 101 is installed in an aerosol chamber 102. Aerosol is placed in the aerosol chamber 102. The aerosol chamber 102 and the fire extinguishing agent chamber 105 are separated by a diaphragm 103. The other end is installed with a leakage detection mechanism 7 and a pipeline 4, and an explosion venting piece 104 is installed between the fire extinguishing agent chamber 105 and the installation port of the pipeline 4.

[0045] Under normal conditions, the fire extinguisher bottle group has normal pressure inside, which can greatly reduce the risk of leakage and there is no danger of explosion of the bottle group. It is suitable for installation in the passenger compartment of rail transit vehicles. When a trigger signal is received, the resistance wire 101 heats up and ignites the initiator outside the resistance wire 101, so that the temperature in the cavity quickly ignites the aerosol. The gas generated after the aerosol burns enters the shell, increasing the pressure inside the shell. Under the action of the pressure difference, the explosion venting plate 104 located at the bottle mouth is pushed open, and the perfluorohexanone fire extinguishing agent inside the shell is sprayed out from the nozzle 5 through the pipeline 4.

[0046] The gas fire extinguishing device 1 can be placed horizontally or vertically. When the gas fire extinguishing device 1 is placed vertically, the leakage detection mechanism 7 is connected to the gas fire extinguishing device 1 through the thread of the mechanism end 704, and outputs a switching signal alarm. The leakage detection mechanism 7 includes a float 703 and a rod 702 vertically placed in the fire extinguishing agent chamber 105. The circuit is turned on and off according to the height of the float 703. When the distance D between the float 703 and the end face 705 of the rod 702 is less than the set value, the circuit is in the on state. As the liquid level inside the gas fire extinguishing device 1 drops, the distance between the float 703 and the end face 705 gradually increases. When the distance D between the float 703 and the end face 705 is greater than the set value, the circuit is disconnected and a liquid level alarm signal is sent.

[0047] When the gas fire extinguishing device 1 is placed horizontally, the leakage detection mechanism 7 is also connected to the gas fire extinguishing device 1 through the thread of the mechanism end 704. The leakage detection mechanism 7 includes a float 701 and a rod 702 placed horizontally in the fire extinguishing agent chamber 105. The circuit is changed by the angle between the float 701 and the rod 702. When the angle between the float 701 and the rod 702 is less than a certain angle, the circuit is in the on state. As the liquid level inside the gas fire extinguishing device 1 decreases, the angle between the float 701 and the rod 702 gradually increases. When the angle between the float 701 and the rod 702 is greater than a certain angle, the circuit is disconnected and an alarm signal is sent.

[0048] The structure of the cable type temperature detector 8 is as follows Figure 7 As shown, the heat-sensitive insulating material 802 melts due to heat, and the metal core 801 wrapped in the insulating material contacts each other, the circuit is connected, and current is generated. The current signal is converted and transmitted to the control system. The control system sends an instruction to close the relay K2 switch and start the gas fire extinguishing device 1. After the gas fire extinguishing device 1 is started, the fire extinguishing agent is sprayed from the nozzle 5 along the pipeline 4 for spraying. At the same time, the control system will receive fire information and gas fire extinguishing device startup information.

[0049] Reference Figure 8The temperature-sensitive magnetic power generation component 9 is a temperature-sensitive starting device. One end of the moving rod 902 is fixed in the thermistor 901. The moving rod 902 passes through the spring 903 and compresses it. When the thermistor 901 senses the temperature and deforms, the moving rod 902 is released. After the moving rod 902 loses its fixation, under the action of the potential energy of the spring 903, the magnet 904 at the other end of the moving rod 902 can quickly pass through the induction coil 905 at the bottom, and use the principle of electromagnetic induction to generate a pulse current. The current passes through the resistance wire 101 to heat itself, igniting the triggering device outside the resistance wire 101. The gas generated by the combustion of the aerosol enters the interior of the shell, increasing the pressure inside the shell. Under the action of the pressure difference, the explosion-proof plate 104 at the bottle mouth is pushed open, and the perfluorohexanone fire extinguishing agent inside the shell is sprayed out from the nozzle 5 through the pipeline 4, starting the gas fire extinguishing device and feeding back a signal to the entire vehicle at the same time.

[0050] When the system is powered off, the cable-type heat detectors will not function properly. If a fire occurs at this time, the temperature sensing magnetic generator in the temperature detection system will be activated. The magnetic generator will generate current when heated, activating the gas fire extinguishing device 1. After the gas fire extinguishing device 1 is activated, the fire extinguishing agent will be sprayed from the nozzle 5 along the pipeline 4, causing a spray. At the same time, the control system will receive the fire information and the device activation information.

[0051] Reference Figure 9 and Figure 10 , which is a working logic diagram and electrical principle diagram of the present invention. When the cable-type temperature detector 8 detects that the temperature in the electrical cabinet 3 reaches the temperature threshold, the relay K2 switch is closed, the temperature detection system outputs an alarm signal to the train, and the gas fire extinguishing device 1 is activated to extinguish the fire. Alternatively, when the system is powered off, the temperature-sensitive magnetic power generation component 9 detects that the ambient temperature reaches the temperature threshold, and the temperature-sensitive magnetic power generation component 9 generates current to activate the gas fire extinguishing device 1 to extinguish the fire. Manual activation is also possible.

[0052] When the gas fire extinguishing device 1 is activated, it will send a signal to the train through the control system to inform the staff that a fire has occurred in an electrical cabinet somewhere.

[0053] When the gas fire extinguishing device 1 leaks, a leakage signal will be sent to the train through the control system to inform the staff that the gas fire extinguishing device 1 at that location has leaked.

[0054] This device has two starting modes. The first triggering mode is the temperature-sensitive magnetic power generation component 9. When the system is powered off, the temperature-sensitive magnetic power generation component 9 is heated to generate current, which starts the gas fire extinguishing device 1. It can be used as a power source to directly supply power to the devices in the gas fire extinguishing device 1 and output a fire signal to the entire vehicle through the control system.

[0055] The second triggering form is triggered by a sensor, in which the train battery provides a 24V power supply, which has two contacts, namely 0V and 24V. After the power enters the system, it supplies power to the A1 contact of relay K2, the cable-type temperature detector 8, the control system and the leakage detection mechanism 7 respectively. Among them, the cable-type temperature detector 8 or the manual start control system is triggered to start relay K2, and the relay K2 switch is closed to turn on the gas fire extinguishing device 1. When the K2 relay is triggered, it will simultaneously send a start signal to the control system, which is sent to the train by the control system. A leakage detection mechanism 7 is set inside the gas fire extinguishing device 1. When the sensor is triggered, the A1 contact of relay K1 is energized and a leakage signal is sent to the controller. All power supply devices are eventually connected to the battery 0V circuit through the 0V power supply.

Claims

1. A train electrical cabinet fire extinguishing system, characterized in that: Its subsystems include: a temperature detection system, a gas fire extinguishing device, a control system, pipelines and nozzles. The temperature detection device includes a cable-type temperature detector and a temperature-sensitive magnetic power generation component. The cable-type temperature detector and the temperature-sensitive magnetic power generation component are both located in the electrical cabinet. The cable-type temperature detector is wound in the electrical cabinet from top to bottom along with the cable and is always at the outermost side of the cable harness, so that the cable-type temperature detector can detect every space in the electrical cabinet. The gas fire extinguishing device is used to store fire extinguishing agent. The gas fire extinguishing device can be fixed horizontally or vertically in the electrical cabinet. The pipeline can be adjusted according to requirements. When the signal is received, the fire extinguishing agent is sprayed. The cable-type temperature detector and the gas fire extinguishing device in the temperature detection system are respectively connected to the control system, and the temperature-sensitive magnetic power generation component in the temperature detection system is connected to the gas fire extinguishing device. One end of the pipeline is connected to the gas fire extinguishing device and the other end is connected to the nozzle.

2. A train electrical cabinet fire extinguishing system according to claim 1, characterized in that: The control system communicates with the train and is used to transmit the fire signal fed back by the temperature detection system received by the fire controller to the train and control the activation of the gas fire extinguishing device. At the same time, it receives feedback signals from the cable-type temperature detector and the temperature-sensitive magnetic power generation component, and can receive fire information and gas fire extinguishing device activation information. By clicking the start button of the train, the train sends a start command to the control system, and after receiving the command, the control system can trigger the gas fire extinguishing device at the corresponding position. When the temperature detection system detects a fire, it generates current, and the current signal is converted and transmitted to the control system. The control system sends a command to close the relay switch and start the gas fire extinguishing device. After the gas fire extinguishing device is started, the fire extinguishing agent is sprayed from the nozzle along the pipeline for spraying. At the same time, the control system will receive the fire information and the device startup information; when the system is powered off, the cable-type temperature detector cannot work normally. If a fire occurs at this time, the temperature-sensitive magnetic power generation component in the temperature detection system will take effect. The temperature-sensitive magnetic power generation component generates current when heated, and the gas fire extinguishing device is started. After the gas fire extinguishing device is started, the fire extinguishing agent is sprayed from the nozzle along the pipeline for spraying. At the same time, the control system will receive the fire information and the device startup information. When a fire occurs, the system can also be started manually. The staff operates the train's human-computer interaction screen and clicks the start button. The train sends a start command to the control system. After receiving the command, the controller can trigger the gas fire extinguishing device at the corresponding location.

3. A train electrical cabinet fire extinguishing system according to claim 1, characterized in that: An installation point is set on the gas fire extinguishing device, which is fastened to the installation hole reserved in the electrical cabinet by bolts. The pipeline is connected to the gas fire extinguishing device by threads and fixed by a fixing clamp on the pipeline path. The pipeline finally extends to the center position of the top of the electrical cabinet, and the nozzle at the end of the pipeline is arranged downward.

4. A train electrical cabinet fire extinguishing system according to claim 3, characterized in that: A resistance wire is installed at one end of the gas fire extinguishing device and connected to an external circuit. The resistance wire is installed in an aerosol chamber. Aerosol is placed in the aerosol chamber. The aerosol chamber and the fire extinguishing agent chamber are separated by a diaphragm. A leakage detection mechanism and a pipeline are installed at the other end. The explosion venting disc is installed between the fire extinguishing agent chamber and the pipeline installation port. When a trigger signal is received, the resistance wire heats up and ignites the initiator outside the resistance wire, causing the temperature inside the cavity to quickly ignite the aerosol. The gas generated after the aerosol burns enters the shell, increasing the pressure inside the shell. Under the action of the pressure difference, the explosion-proof plate at the bottle mouth is pushed open, and the fire extinguishing agent inside the shell is sprayed out from the nozzle through the pipeline.

5. A train electrical cabinet fire extinguishing system according to claim 4, characterized in that: The fire extinguishing agent in the fire extinguishing agent cavity is perfluorohexanone.

6. A train electrical cabinet fire extinguishing system according to claim 4, characterized in that: The leakage detection mechanism is installed inside the gas fire extinguishing device through a thread. When the fire extinguishing agent in the device leaks to a certain amount, a leakage signal is sent to the entire vehicle. The gas fire extinguishing device can be placed horizontally or vertically. When the gas fire extinguishing device is placed vertically, the leakage detection mechanism is connected to the gas fire extinguishing device through the thread at the end of the mechanism, and outputs a switching signal alarm. The leakage detection mechanism includes a float and a rod placed vertically in the fire extinguishing agent chamber. The circuit is changed by the height of the float. When the end face distance D between the float and the rod is less than a set value, the circuit is in an on state. As the liquid level inside the fire extinguishing device drops, the distance between the float and the end face gradually increases. When the distance D between the float and the end face is greater than the set value, the circuit is disconnected and a liquid level alarm signal is sent; When the gas fire extinguishing device is placed horizontally, the leakage detection mechanism is also connected to the gas fire extinguishing device through the thread at the end of the mechanism. The leakage detection mechanism includes a float and a rod placed horizontally in the fire extinguishing agent chamber. The circuit is changed by the angle between the float and the rod. When the angle between the float and the rod is less than a certain angle, the circuit is in the on state. As the liquid level inside the fire extinguishing device drops, the angle between the float and the rod gradually increases. When the angle between the float and the rod is greater than a certain angle, the circuit is disconnected and an alarm signal is sent.

7. A train electrical cabinet fire extinguishing system according to claim 1, characterized in that: The heat-sensitive insulating material of the cable-type temperature detector melts when heated, and the metal cores wrapped in the insulating material come into contact with each other, the circuit is connected, and current is generated.

8. A train electrical cabinet fire extinguishing system according to claim 1, characterized in that: The temperature-sensitive magnetic power generation assembly is a temperature-sensitive starting device. One end of the moving rod is fixed in the thermistor. The moving rod passes through the spring and compresses it. When the thermistor senses the temperature and deforms, the moving rod is released. After the moving rod loses its fixation, under the action of the spring potential energy, the magnet at the other end of the moving rod can quickly pass through the coil at the bottom, and generate a pulse current using the principle of electromagnetic induction. The current passes through the resistance wire of the gas fire extinguishing device to heat itself, ignite the initiator outside the resistance wire, increase the temperature in the cavity to quickly ignite the aerosol, start the gas fire extinguishing device, and at the same time feedback the signal to the control system.

9. A train electrical cabinet fire extinguishing system according to claim 1, characterized in that: The cable-type temperature detector, control system, gas fire extinguishing device and leakage detection mechanism are connected through an electrical loop. The train battery provides a 24V power supply. The power supply has two contacts, namely 0V and 24V. After the power enters the system, it supplies power to the A1 contact of relay K2, the cable-type temperature detector, the control system and the leakage detection mechanism respectively. Among them, the cable-type temperature detector or the manual start control system is triggered to start relay K2, and the relay K2 switch is closed to turn on the gas fire extinguishing device. When relay K2 is triggered, it will synchronously send a start signal to the control system, which is sent to the train by the control system. A leakage detection mechanism is provided inside the gas fire extinguishing device. When the sensor is triggered, the A1 contact of relay K1 is energized and a leakage signal is sent to the controller at the same time. All power supply devices are eventually connected to the battery 0V circuit through the 0V power supply.

10. The electrical cabinet fire extinguishing system according to claim 1, characterized in that: The temperature-sensitive magnetic power generation component, gas fire extinguishing device, and control system are connected through an electrical circuit. When the system is powered off, the temperature-sensitive magnetic power generation component is heated to generate current, which activates the gas fire extinguishing device. It can be used as a power source to directly supply power to the devices in the gas fire extinguishing device and output a fire signal to the entire vehicle through the control system.

Images