Fire suppression device for traction transformer under motor train unit
By using dual-spectrum detectors and multi-nozzle fire suppression systems in the traction transformers under EMU trains, the problem of fire hazards in the traction transformers under EMU trains has been solved, achieving early warning and efficient fire suppression, and improving safety and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN HANGLIAN TIKE SCI & TECHN
- Filing Date
- 2025-02-27
- Publication Date
- 2026-04-10
AI Technical Summary
There is a fire hazard in the traction transformer under the EMU, especially in the external components that are in contact with the air, such as the high and low voltage terminals, which may cause fires when there is oil leakage or discharge fault. The existing fire detection and extinguishing solutions are insufficient.
It employs a dual-spectrum detector integrating an infrared thermal imaging detector and a visible light detector to monitor the temperature and image data of the wiring terminals, and uses a multi-nozzle fire extinguisher to suppress fires. Combined with a controller and communication module, it achieves intelligent control and remote monitoring.
It enables precise monitoring and early warning of fire hazards, improves fire extinguishing efficiency and safety, reduces operation and maintenance costs, and ensures the safe operation of high-speed trains.
Smart Images
Figure CN224099857U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a train set undercarriage traction transformer fire suppression device belongs to train set fire fighting technical field. BACKGROUND
[0002] The train set undercarriage traction transformer is one of the key components of the train set, and its safety and reliability directly affect the operation safety of the train. In recent years, with the continuous improvement of the running speed of the train set, the working environment of the traction transformer has become more complex and severe, and the fire hazard problem has gradually emerged. On January 25, 2018, a CRH380BL train set at Qingdao North Station caught fire due to a fire in the undercarriage traction transformer, causing a 4 square meter hole on the right side of the No. 2 car, seriously threatening the safety of passengers' life and property. This accident shows that the traction transformer has fire hazards under certain conditions, and effective fire detection and fire extinguishing solutions are urgently needed.
[0003] The train set undercarriage traction transformer usually adopts a core structure and is elastically hung under the car, including a transformer 1 and an oil cooling assembly. The winding of the transformer 1 has an F-grade heat resistance, and uses a difficult-to-burn synthetic ester oil as an insulating and cooling medium. The oil cooling assembly includes an oil tank (not shown in the figure), an oil cooler, an oil pump 4, and a circulating pipeline 5. The oil pump 4 pumps the oil in the oil tank into the transformer 1 and then back to the oil tank through the oil cooler. The oil cooler includes a fan 31 and a heat exchanger 32. The inlet of the fan 31 is provided with a filter 33. The cold air flow is sucked into the heat exchanger 32 by the fan 31 and exchanges heat with the high-temperature oil to form hot air which is blown out of the air outlet 34. In order to ensure the safe operation of the transformer 1, temperature sensors, current transformers, oil flow relays, pressure relief valves and other protection devices are usually provided. However, despite these measures, the transformer 1 may still catch fire due to external factors.
[0004] According to the three elements of combustion (combustible material, combustion-supporting material and ignition source), the fire hazard of the traction transformer mainly comes from the external components in contact with air. Under normal circumstances, the inside of the transformer is isolated from air, and the synthetic ester oil and silicon oil have poor flammability, with a burning point greater than 300℃, so the discharge fault inside the oil tank will not cause the transformer oil to burn. However, the non-metallic components such as high and low voltage terminals and cables outside the transformer may cause a fire if they leak oil and the oil comes into contact with air, and at the same time, these components may also cause a discharge fault at the place where the oil leaks, thus meeting the three conditions for combustion.
[0005] Through on-site investigation and investigation of transformer oil leakage, it is found that the number of low-voltage terminals of the transformer is large, and the tank body is prone to leak transformer oil. Through arc, contact resistance and other factors, the low-voltage terminal overheats, ignites the oil transformer oil and forms a fire. Therefore, the low-voltage terminal becomes the key fire protection area.
[0006] In summary, the EMU under traction transformer has fire hazard under certain conditions, especially the components in contact with the air, such as high and low voltage terminals, etc. Once the oil leakage and discharge failure occur, a fire may be caused. Therefore, an effective fire detection and extinguishing scheme is urgently needed to ensure the safe operation of the EMU. Practical new type content
[0007] Therefore, the purpose of the present application is to provide a kind of EMU under traction transformer fire suppression device, to the terminal position in the EMU under traction transformer component is monitored and fire suppression.
[0008] In order to achieve the above purpose, the utility model discloses a kind of including transformer, oil cooling component and fire suppression component;The oil cooling component includes oil tank, oil cooler, oil pump and circulation pipeline, the oil pump is used to pump the oil in the oil tank into transformer and flows through oil cooler and then back to the oil tank;The fire suppression component includes detector and fire extinguisher, the detector is used to collect the infrared thermal imaging data and / or visible light image data of terminal part, the fire extinguisher is connected to the spray head by pipeline, the spray head is set towards the terminal part.
[0009] The detector includes dual-spectrum detector integrating infrared thermal imaging detector and visible light detector.
[0010] Illumination light source is further provided on the dual-spectrum detector.
[0011] The fire suppression component further includes protective cover, and the protective cover covers the outside of the terminal.
[0012] The terminal is a plurality of, and the plurality of terminals are arranged in a row;The spray head is a plurality of;Wherein part of the spray head is arranged on the opposite side of the terminal, and is arranged towards the terminal part.
[0013] At least two spray heads are located on the outside of both ends of the terminals arranged in a row and are oppositely arranged.
[0014] The fire suppression component further includes a controller, and the infrared thermal imaging detector and / or visible light detector are connected to the controller, and the controller is used to receive the data signal sent by the infrared thermal imaging detector and / or visible light detector.
[0015] The fire extinguisher or the spray head is provided with a control valve, and the control valve is connected to the controller, and the controller is used to control the opening and closing of the control valve.
[0016] The controller further includes a communication module, and the communication module is connected to the vehicle control center system.
[0017] The controller further comprises an alarm module for sending alarm information to the vehicle control center system through the communication module.
[0018] With the technical scheme, the motor train unit traction transformer fire suppression device has the following beneficial effects compared with the prior art:
[0019] 1. The infrared thermal imaging detector and the visible light detector are arranged to monitor the temperature change and image data of the wiring terminal part in real time, realize accurate monitoring and early warning of fire hazards, and effectively avoid the occurrence of fire.
[0020] 2. The protective cover is arranged to suppress local fire at the wiring terminal part, and the fire extinguishing agent directly acts on the fire hazard area to improve the fire extinguishing efficiency and reduce the waste of the fire extinguishing agent.
[0021] 3. The controller is used to realize intelligent control of the infrared thermal imaging detector, the visible light detector and the fire extinguisher, and the fire extinguishing device can be automatically started according to the monitoring data, and the vehicle control center system is linked to realize remote monitoring and rapid response.
[0022] 4. The fire suppression assembly is convenient to install, maintain and replace, can be installed and used without changing the original transformer structure, reduces the operation and maintenance cost, and improves the reliability and service life of the system.
[0023] 5. The motor train unit traction transformer fire suppression device can effectively reduce the damage of fire to the traction transformer and the motor train unit, reduce the safety risk and economic loss caused by fire, significantly improve the fire prevention and control ability of the traction transformer under the motor train unit, and has the characteristics of high efficiency, reliability and intelligence. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a structural schematic view of the existing traction transformer under the motor train unit.
[0025] Figure 2It is a structural schematic view of the embodiment one of the utility model.
[0026] Figure 3 For Figure 2 Another angle schematic view.
[0027] Figure 4 It is a structural schematic view of the embodiment two of the utility model. DETAILED DESCRIPTION
[0028] Through investigation, the traction transformer is in the hidden area of the protection plate under the motor train, is not easy to detect and observe, the monitoring part has low protection level, large airflow change, complex environment, strong electromagnetic interference and high insulation. After long-term vibration, the terminal interface is loose and leaks oil, the terminal is aged, the insulation is reduced, the impedance is increased, the temperature is increased, the arc is abnormal, and the fire is caused. The fire formation process is from early smoke, temperature rise, to fire burning or deflagration. Therefore, a detector capable of monitoring smoke and temperature change in real time and adapting to high wind speed, large airflow change and strong electromagnetic interference under the train is required.
[0029] Due to the semi-closed environment state of the traction transformer under the train, the motor train runs at high speed, the air flow under the train is large, and the dust pollution is strong. The ordinary point type photoelectric smoke and temperature detector relies on passive labyrinth sensing detection. In the running environment of the motor train with large air flow (wind speed greater than 2 m / s), the smoke generated by fire cannot be effectively locked by the labyrinth, and early detection and alarm cannot be achieved. Moreover, the dust under the train is large, which is easy to cause pollution or false alarm of the detector. For the closed low-voltage terminal box, the air inside the box does not flow, the smoke generated by fire cannot be diffused to the inside of the labyrinth in time, and early detection and alarm cannot be achieved.
[0030] The point type temperature detector is suitable for completely closed space, but its alarm speed is slow. Only when the temperature of the whole space reaches the saturation temperature alarm threshold, the temperature detector can effectively alarm. Due to the continuous loss of heat in the semi-open space, it is difficult or impossible for the temperature to reach the alarm value. Even if it can alarm, it is in the late stage of fire, and the flame has already spread completely. Therefore, the point type temperature detector is not suitable.
[0031] The cable type temperature sensing wire is mainly attached to the outer surface of the protected object. When the low-voltage wiring terminal is arranged, there is an insulation problem after the outer skin of the cable type temperature sensing wire is broken when the temperature rises. The terminal is not suitable. The cable is arranged. The temperature of the cable skin is detected, that is, the average temperature of the cable. When the average temperature exceeds the alarm, the temperature of the cable core has far exceeded the alarm temperature, and the instantaneous temperature cannot be monitored, so early alarm cannot be achieved. Therefore, it is not suitable.
[0032] Therefore, the integrated detector using visible light and visual thermal imaging can meet the requirements of complex environment and fire detection in the monitoring area.
[0033] The utility model will be further explained in detail through the drawings and specific embodiments.
[0034] Embodiment one:
[0035] As shown in Figure 2 , 3 , the motor train unit under-train traction transformer fire suppression device of the embodiment comprises a transformer 1, an oil cooling assembly, and a fire suppression assembly. The oil cooling assembly comprises an oil storage tank, an oil cooler, an oil pump 4, and a circulating pipeline 5. The oil pump 4 is used to pump the oil in the oil storage tank into the transformer 1 and then back to the oil storage tank after flowing through the oil cooler.
[0036] The fire suppression assembly comprises a protective cover 61, an infrared thermal imaging detector, a visible light detector, an auxiliary lighting source, a fire extinguisher 62, and a controller 63. The protective cover 61 is fixed to the transformer 1 and covers the outside of the terminal 10. The controller 63 is installed on the side of the transformer 1. The infrared thermal imaging detector and the visible light detector form an integrated dual-spectrum detector 64. The auxiliary lighting source is arranged on the dual-spectrum detector 64. The dual-spectrum detector 64 is installed on the protective cover 61 and is arranged towards the inside of the protective cover 61 to collect infrared thermal imaging data and image data of the terminal 10. The auxiliary lighting source is used to provide lighting for the terminal 10.
[0037] The infrared thermal imaging detector and the visible light detector are connected to the controller 63. The controller 63 is used to receive the data signals sent by the infrared thermal imaging detector and the visible light detector.
[0038] The fire extinguisher 62 is connected to the spray head 65 through the pipeline 621. The spray head 65 is installed on the protective cover 61 and can spray fire suppression agents towards the inside of the protective cover 61 to suppress the fire.
[0039] A control valve is arranged on the fire extinguisher 62 or the spray head 65. The control valve is connected to the controller 63. The controller 63 is used to control the opening and closing of the control valve.
[0040] The controller 63 further comprises a communication module and an alarm module, the communication module is connected to the vehicle control center system. The alarm module is used for sending alarm information to the vehicle control center system through the communication module. When the fire is detected, the vehicle control center system receives the alarm information, the driver checks and confirms the fire alarm signal in the vehicle video monitoring system, when confirming the fire, the driver manually starts the fire extinguishing button to open the control valve for fire extinguishing. Of course, in addition to manual control of fire extinguishing, the controller 63 can also automatically control fire extinguishing after detecting the fire.
[0041] Embodiment two:
[0042] In order not to destroy the original appearance of the transformer which has been used, in the embodiment, as shown in the figure, the fire extinguishing assembly is not provided with a protective cover, but adopts an open structure for fire extinguishing. Specifically, when installing the fire extinguishing assembly, the fire extinguisher 62, the spray head 65, the controller 63 and the dual-spectrum detector 64 can be directly fixed and installed at the bottom of the motor car. Figure 4
[0043] The plurality of wiring terminals 10 are arranged in a row. The plurality of spray heads 65 are arranged, and part of the spray heads 65 are arranged on the opposite sides of the wiring terminals 10 and face the positions of the wiring terminals 10, and at least two of the spray heads 65 are arranged on the outer sides of the two ends of the wiring terminals 10 arranged in a row and face each other.
[0044] The fire extinguisher 62 can be a non-pressure storage type perfluorohexanone fire extinguisher (preferably used in the closed fire extinguishing structure of embodiment one), which is pressure-free storage of medicament, has the characteristics of simple structure, convenient installation and construction, long maintenance-free period, simple daily online detection and maintenance, no need for professional detection personnel, avoids the requirement of regular intensity test and inspection of special equipment of the pressure storage type fire extinguishing device, and low regular inspection and maintenance cost. Of course, the fire extinguisher can also be a pressure storage type perfluorohexanone fire extinguisher (preferably used in the open fire extinguishing structure of embodiment two, which can provide larger spray pressure).
[0045] Obviously, the above embodiments are only examples for clearly illustrating, and are not limitations to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.
Claims
1. A fire suppression device for traction transformers under high-speed trains, characterized in that: The fire suppression assembly comprises a detector and a fire extinguisher, the detector is used to collect infrared thermal imaging data and / or visible light image data of the terminal part, the fire extinguisher is connected to the nozzle through a pipeline, and the nozzle is arranged towards the terminal part.
2. The EMU under-vehicle traction transformer fire suppression apparatus of claim 1, wherein: The fire suppression assembly further comprises a protective cover, which covers the outside of the terminal.
3. The EMU under-vehicle traction transformer fire suppression apparatus of claim 1, wherein: The terminals are arranged in a row, and the nozzles are also arranged in a row.
4. The EMU under-vehicle traction transformer fire suppression apparatus of claim 3, wherein: At least two nozzles are arranged on the two ends of the terminals and are arranged oppositely.
5. The EMU under-vehicle traction transformer fire suppression apparatus of claim 1, wherein: The detector comprises a dual-spectrum detector integrating an infrared thermal imaging detector and a visible light detector.
6. The EMU under-vehicle traction transformer fire suppression apparatus of claim 5, wherein: The dual-spectrum detector is further provided with an illumination light source.
7. The EMU under-vehicle traction transformer fire suppression apparatus of any one of claims 5-6, wherein: The fire suppression assembly further comprises a controller, the infrared thermal imaging detector and / or the visible light detector are connected to the controller, and the controller is used to receive the data signal sent by the infrared thermal imaging detector and / or the visible light detector.
8. The EMU under-vehicle traction transformer fire suppression apparatus of claim 7, wherein: The fire extinguisher or the nozzle is provided with a control valve, the control valve is connected to the controller, and the controller is used to control the opening and closing of the control valve.
9. The EMU under-vehicle traction transformer fire suppression apparatus of claim 7, wherein: The controller further comprises a communication module, which is connected to a vehicle control center system.
10. The EMU under-vehicle traction transformer fire suppression apparatus of claim 9, wherein: The controller further comprises an alarm module, which is used to send alarm information to the vehicle control center system through the communication module.