Water inlet alarm device for fuse box of metro vehicle

Abstract

The utility model discloses a metro vehicle fuse box water inlet alarm device, which comprises a microcontroller, a stainless steel electrode, a sound-light alarm module, a wireless transmission module, a power supply module and a linkage protection unit, the stainless steel electrode judges accumulated water by detecting resistance change, the microcontroller receives signals and controls each component to work, and the linkage protection unit is connected with the wireless transmission module. The sound-light alarm module comprises a buzzer and an alarm lamp which are installed on the fuse box and the cab operation table. The power supply module adopts DC24V power supply and is provided with a lithium battery, and the linkage protection unit comprises a drainage pump and a high-risk circuit cut-off switch. The device is simple in structure, fast in response, high in reliability and capable of effectively guaranteeing the safety of an electrical system of the metro vehicle.

Description

Technical Field

[0001] This utility model relates to the field of safety technology for rail transit equipment, specifically a water ingress alarm device for a fuse box in a subway vehicle. Background Technology

[0002] The fuse box in a subway car is a core protective component of the electrical system. It is usually installed at the bottom of the car body or in the equipment compartment. Due to the complex and variable operating environment of the subway, such as in damp tunnels or during heavy rain, the fuse box may be flooded due to sealing failure or external environmental factors. Once water enters, it is very likely to cause short circuits, fuse malfunctions, and even fire risks.

[0003] Currently, most fuse boxes rely solely on sealing strips or waterproof casings for passive protection, lacking the function of actively monitoring water ingress and issuing timely alarms. Although some humidity detection devices exist in existing technologies, these devices suffer from insufficient sensitivity, high false alarm rates, and inability to accurately determine the location of water accumulation. Utility Model Content

[0004] The purpose of this invention is to provide a simple, fast-responding, and highly reliable water ingress alarm device for fuse boxes in subway vehicles, which monitors the water accumulation status inside the fuse box in real time and triggers an alarm in a timely manner, thereby ensuring the safety of the electrical system of subway vehicles.

[0005] A water ingress alarm device for a fuse box in a subway vehicle includes: an STM32 series microcontroller installed inside the fuse box; the microcontroller receiving water accumulation signals detected by stainless steel electrodes and controlling the operation of a first buzzer, a first warning light, a second buzzer, a second warning light, a wireless transmission module, a drainage pump, and a high-risk circuit cutoff switch based on these signals; the microcontroller is electrically connected to stainless steel electrodes for detecting water accumulation, which determine water accumulation by detecting changes in resistance between the electrodes; when the water level reaches a set threshold, the electrodes conduct and output a signal to the microcontroller. The electrode is located on one side of the bottom of the fuse box; a first buzzer and a first warning light are installed on the fuse box, which are used for audible and visual alarms; a second buzzer and a second warning light are installed on the driver's cab control panel; a wireless transmission module and a power module are installed inside the fuse box, which are used for information transmission and power supply, respectively; a drain pump and a high-risk circuit cut-off switch are installed outside the fuse box, and the high-risk circuit cut-off switch is electrically connected to the microcontroller; when the microcontroller continuously receives the water accumulation signal and it is not eliminated after a preset time, it controls the drain pump to start draining or controls the high-risk circuit cut-off switch to cut off the high-risk circuit.

[0006] As a preferred embodiment of this utility model, the spacing between the stainless steel electrodes is 5-10 mm.

[0007] As a preferred embodiment of this utility model, the bottom of the fuse box is provided with an inclined guide groove to guide the accumulated water to flow quickly to the stainless steel electrode.

[0008] As a preferred embodiment of this utility model, the wireless transmission module integrates a LORA wireless communication unit, and the alarm information is transmitted to the vehicle control center and the ground operation and maintenance platform in real time.

[0009] As a preferred embodiment of this utility model, the power module is powered by a DC24V power supply inside the fuse box, and the power module also includes a backup lithium battery to ensure continuous operation during power outages.

[0010] As a preferred embodiment of this utility model, a high-risk circuit cut-off switch is installed on the outside of the fuse box, and the high-risk circuit cut-off switch is electrically connected to the control module.

[0011] As a preferred embodiment of this utility model, the surface of the stainless steel electrode is provided with a gold plating layer.

[0012] As a preferred embodiment of this utility model, the first and second warning lights are LED red warning lights, and the first and second buzzers are 85dB buzzers.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects:

[0014] This invention utilizes an electrode-based detection method to achieve highly sensitive water accumulation monitoring. This method is cost-effective and highly resistant to interference, accurately detecting water accumulation within fuse boxes. The combination of local audible and visual alarms (first buzzer, first warning light, second buzzer, second warning light) and remote wireless transmission ensures rapid response and timely handling of water ingress issues by maintenance personnel. The modular design facilitates integration into existing fuse boxes without requiring large-scale modifications, reducing application costs and complexity. Linkage protection functions, such as drainage pumping and cutting off high-risk circuits, minimize the risk of secondary faults caused by water ingress, ensuring the safe and stable operation of the subway vehicle's electrical system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] In the diagram: 1. Fuse box; 2. Stainless steel electrode; 3. Drain pump; 4. Power module; 5. Wireless transmission module; 6. First buzzer; 7. First warning light; 8. Microcontroller; 9. High-risk circuit cut-off switch; 10. Inclined guide trough; 11. Second buzzer; 12. Second warning light; 13. Driver's cab control panel. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example 1

[0019] like Figure 1 As shown, a specific embodiment of the water ingress alarm device for a fuse box in a subway vehicle according to this utility model includes:

[0020] Microcontroller 8: It adopts an STM32 series microcontroller and is located inside the fuse box 1. Its main function is to receive the water accumulation signal detected by the stainless steel electrode 2 and control the working status of the first buzzer 6, the first warning light 7, the second buzzer 11, the second warning light 12, the wireless transmission module 5, the drainage pump 3, and the high-risk circuit cut-off switch 9 based on the signal. When the microcontroller 8 continuously receives the water accumulation signal and it is not eliminated after a preset time, it will control the drainage pump 3 to start drainage or control the high-risk circuit cut-off switch 9 to cut off the high-risk circuit.

[0021] Water level detection module: The microcontroller 8 is electrically connected to stainless steel electrodes 2 for detecting water accumulation. These electrodes are located on one side of the bottom of the fuse box 1. The stainless steel electrodes 2 determine whether there is water accumulation by detecting the change in resistance between the electrodes. When the water level reaches the set threshold, the electrodes conduct and output a signal to the microcontroller 8. The spacing between the stainless steel electrodes 2 is 5-10mm, and the electrode surface is provided with a gold plating layer to enhance its corrosion resistance.

[0022] Audible and visual alarm module: A first buzzer 6 and a first warning light 7 are installed on the fuse box 1, and a second buzzer 11 and a second warning light 12 are installed on the cab control panel 13. They are all used for audible and visual alarms; among them, the first warning light 7 and the second warning light 12 are LED red warning lights, and the first buzzer 6 and the second buzzer 11 are 85dB buzzers.

[0023] Wireless transmission module 5: The fuse box 1 is equipped with a wireless transmission module 5. This module integrates a 4G or LoRa wireless communication unit and can transmit alarm information to the vehicle control center and ground operation and maintenance platform in real time.

[0024] Power module 4: Power module 4 is also installed in fuse box 1, and is powered by DC24V power inside fuse box 1. It is also equipped with a backup lithium battery to ensure that the device can continue to work when the power is off.

[0025] Interlocking protection unit: The fuse box 1 is equipped with a drain pump 3 and a high-risk circuit cut-off switch 9. The high-risk circuit cut-off switch 9 is electrically connected to the microcontroller 8. When the continuous water inflow is not dealt with for a timeout, the microcontroller 8 will control the drain pump 3 to start draining or cut off the high-risk circuit.

[0026] The working principle of this utility model:

[0027] The electrode pair of the water level detection module is sealed and fixed to the bottom plate of the fuse box 1 with epoxy resin. The control module is installed in the protective cover on the side wall of the box. The audible and visual alarm is placed on the top of the box. After the device is powered on, the STM32 series microcontroller 8 starts to continuously monitor the resistance value between the electrodes.

[0028] When water accumulates in fuse box 1, as the water level rises, the resistance between the electrodes gradually decreases due to the conductivity of water. When the resistance value falls below the set threshold (corresponding to a 3mm water level), it indicates that the water accumulation in the box has reached the detection standard. The stainless steel electrode 2 transmits the signal to the microcontroller 8. The inclined guide channel 10 at the bottom of fuse box 1 guides the accumulated water to flow quickly towards the electrode, accelerating the detection response. At the same time, the delay judgment function integrated into the microcontroller 8 (such as detecting water accumulation for 5 seconds) avoids false alarms caused by instantaneous water droplet interference. Once the microcontroller 8 confirms the water accumulation, it triggers the audible and visual alarms in sequence. The high-brightness LED warning light in the audible and visual alarm installed on the top of the box starts to flash, and the 85dB buzzer sounds to remind on-site personnel. At the same time, the wireless transmission module 5 sends the "Fuse Box 1 Water Ingress Code E12" to the vehicle control center and the ground operation and maintenance platform in real time, so that the operation and maintenance personnel can keep abreast of the situation.

[0029] If the water accumulation continues and is not addressed, the microcontroller 8 controls the external drainage pump 3 of the fuse box 1 to drain the water and cut off high-risk circuits, reducing the risk of failure.

[0030] In addition, the alarm module supports multi-level warnings. When the water level reaches the first-level threshold, only a light indicator is displayed. When the water level reaches the second-level threshold, an audible and visual alarm is triggered and a code is uploaded. Maintenance personnel can clear the alarm status and restore the device to normal monitoring by using the reset button or remote command.

[0031] All components mentioned in this article are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods, so they will not be described in detail here.

[0032] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. A subway car fuse box water intrusion alarm device, characterized by, The utility model relates to a kind of integrated type water detection device for high-voltage fuse box, including: Microcontroller (8), microcontroller (8) is arranged inside fuse box (1), stainless steel electrode (2) for detecting water is electrically connected with microcontroller (8), stainless steel electrode (2) is arranged at one side of the bottom of fuse box (1), first buzzer (6) and first warning light (7) are installed on fuse box (1), and first buzzer (6) and first warning light (7) are used for sound and light alarm, second buzzer (11) and second warning light (12) are installed in cab operating platform (13), wireless transmission module (5) and power module (4) are installed in fuse box (1), and wireless transmission module (5) and power module (4) are used for information transmission and power supply respectively, drain pump (3) is installed outside fuse box (1).

2. The subway vehicle fuse box water entry alarm device according to claim 1, characterized in that: The interval between the stainless steel electrodes (2) is 5-10 mm.

3. The subway vehicle fuse box water intrusion alarm device of claim 1, wherein: The bottom of the fuse box (1) is provided with an inclined flow guide groove (10) for guiding the water to flow quickly to the stainless steel electrodes (2).

4. The subway vehicle fuse box water intrusion alarm device of claim 1, wherein: The wireless transmission module (5) integrates a LORA wireless communication unit, and the alarm information is transmitted to the vehicle control center and the ground operation platform in real time.

5. The subway vehicle fuse box water intrusion alarm device of claim 1, wherein: The power module (4) is powered by a DC 24V power supply inside the fuse box (1), and the power module (4) further includes a backup lithium battery to ensure continuous operation during power failure.

6. The subway vehicle fuse box water intrusion alarm device of claim 1, wherein: A high-risk circuit cutoff switch (9) is installed outside the fuse box (1), and the high-risk circuit cutoff switch (9) is electrically connected with the control module.

7. The subway vehicle fuse box water intrusion alarm device of claim 1, wherein: The stainless steel electrode (2) is provided with a gold plating layer on the surface.

8. The subway vehicle fuse box water intrusion alarm device of claim 1, wherein: The microcontroller (8) uses an STM32 series.

9. The subway vehicle fuse box water intrusion alarm device of claim 1, wherein: The first warning light (7) and the second warning light (12) use LED red warning lights, and the first buzzer (6) and the second buzzer (11) use 85dB buzzers.

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