A humidity monitoring device for low-voltage AC switchgear in rail transit

Abstract

This utility model belongs to the field of humidity monitoring for power equipment, and particularly relates to a humidity monitoring device for low-voltage AC switchgear in rail transit. It includes a mounting shell, a humidity monitor, a fan, heat-conducting fins, a connecting frame, a cooling plate, and cooling fins. The humidity monitor is mounted on the top of the mounting shell, the fan is mounted on one side inside the mounting shell, and the heat-conducting fins and connecting frame are also mounted on one side inside the mounting shell, with the heat-conducting fins located to the right of the fan and the connecting frame to the right of the heat-conducting fins. A cooling plate is installed inside the connecting frame, extending through the thickness of the connecting frame. The cooling fins are installed inside the mounting shell. By incorporating a lifting assembly, the humidity monitor can be moved vertically within the switchgear for monitoring, dynamically collecting humidity data from different height areas, comprehensively understanding the humidity distribution inside the switchgear, effectively overcoming the limitations of fixed installation, and improving the completeness and reliability of monitoring.

Description

Technical Field

[0001] This utility model belongs to the field of humidity monitoring of power equipment, and in particular relates to a humidity monitoring device for low-voltage AC switchgear in rail transit. Background Technology

[0002] With the rapid development of urban rail transit and the continuous improvement of electrification levels, low-voltage AC switchgear, as a key piece of equipment in the power supply system, directly affects the safety and reliability of the entire rail transit system through its operational stability. During long-term operation, the interior of the switchgear is susceptible to external environmental influences, resulting in significant changes in humidity. Therefore, real-time and accurate humidity monitoring is of paramount importance.

[0003] However, existing ordinary humidity monitoring devices usually only have basic humidity sensing functions and are mostly fixedly installed in a certain local position inside the switch cabinet. Due to the single monitoring point, it is difficult to fully reflect the humidity distribution in different height areas of the cabinet, resulting in obvious monitoring blind spots. In addition, most of these devices only realize data collection and alarm prompts. When the ambient humidity rises, manual intervention or external independent dehumidification equipment is still required, resulting in untimely response and delayed processing, which makes it difficult to meet the requirements of rail transit systems for intelligent, automated and highly reliable operation.

[0004] Therefore, there is a particular need for a humidity monitoring device for low-voltage AC switchgear in rail transit to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of existing humidity monitoring devices, such as limited monitoring range, inability to automatically dehumidify, and delayed response, this utility model provides a humidity monitoring device for low-voltage AC switchgear in rail transit.

[0006] This utility model is achieved through the following technical approach: A humidity monitoring device for a low-voltage AC switchgear in rail transit includes a mounting shell, a humidity monitor, a fan, heat-conducting fins, a connecting frame, a cooling plate, cooling fins, a first connecting cover, a second connecting cover, a blower, a heating wire, a drain frame, a conduit, a water tank, a drain pipe, and a controller. The humidity monitor is installed on the top of the mounting shell, and the fan is installed on one side inside the mounting shell. The heat-conducting fins and the connecting frame are also installed on one side inside the mounting shell. The heat-conducting fins are located to the right of the fan, and the connecting frame is located to the right of the heat-conducting fins. A cooling plate is installed inside the connecting frame, and the cooling plate extends through the thickness of the connecting frame. The cooling fins are installed inside the mounting housing and are located to the right of the cooling plate, in contact with it. Connecting cover one is fixed to the outside of the mounting housing on one side, and connecting cover two is fixed to the outside of the mounting housing on the other side. The fan is installed on connecting cover one, and multiple heating wires are installed inside connecting cover two. The drain frame is fixed to the bottom of the mounting housing and connects to the internal space of the mounting housing. The conduit is fixed to the bottom of the drain frame. The water tank is placed below the mounting housing. The end of the conduit away from the mounting housing is connected to the water tank. A drain pipe is installed on the lower side of the water tank. The controller is also installed on the top of the mounting housing. The humidity monitor, fan, cooling plate, blower, and heating wires are all electrically connected to the controller.

[0007] Optionally, the lifting assembly includes a mounting bracket, a lead screw, a motor, and a slide. The mounting bracket is installed on the top side of the water tank. The lead screw is rotatably mounted on the mounting bracket. The motor is mounted on the upper part of the mounting bracket, with its output shaft extending downward and fixedly connected to one end of the lead screw. The motor is electrically connected to the controller. The slide is threaded on the outside of the lead screw and fixedly connected to the right side of the mounting housing.

[0008] Optionally, both the fan and the blower are equipped with filters.

[0009] Optionally, the drainage frame adopts a flat-top pyramidal structure design with four sloping surfaces. Each sloping surface slopes outward from the top and narrows inward from the bottom, forming a drainage channel that is wider at the top and narrower at the bottom.

[0010] Optionally, the conduit is a corrugated pipe.

[0011] Optionally, the carriage and the mounting bracket form a sliding fit.

[0012] Beneficial effects: 1. By setting up a lifting component, the humidity monitor can be moved vertically inside the switch cabinet for monitoring, dynamically collecting humidity data in different height areas, comprehensively understanding the humidity distribution inside the switch cabinet, effectively overcoming the monitoring limitations caused by fixed installation, and improving the integrity and reliability of monitoring.

[0013] By working together with cooling plates, cooling fins, fans, heating wires, controllers, and humidity monitors, an active dehumidification system is constructed that integrates monitoring, judgment, and execution. When the humidity inside the switch cabinet exceeds the preset safety threshold, the dehumidification program is automatically started, realizing closed-loop control of cooling dehumidification and drying return without manual intervention, significantly improving response speed and operational intelligence.

[0014] 2. By combining the fan and heat-conducting fins, the heat dissipation efficiency of the hot end of the cooling element is significantly improved, avoiding heat accumulation that leads to a decrease in cooling performance and ensuring the long-term stable operation of the dehumidification system. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the mounting shell, humidity monitor, and fan component of this utility model.

[0017] Figure 3 This is a first partial sectional view of the mounting shell component of this utility model.

[0018] Figure 4 This is a second partial sectional view of the mounting shell component of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the connecting cover one, connecting cover two, and fan components of this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the mounting bracket, lead screw, and motor components of this utility model.

[0021] Reference numerals in the attached drawings: 1. Mounting housing; 2. Humidity monitor; 3. Fan; 4. Heat-conducting fins; 5. Connecting frame; 6. Cooling element; 7. Cooling fins; 8. Connecting cover one; 81. Connecting cover two; 9. Fan; 10. Heating wire; 11. Drain frame; 12. Conduit; 13. Water tank; 131. Drain pipe; 14. Mounting bracket; 15. Lead screw; 16. Motor; 17. Slide carriage; 18. Controller. Detailed Implementation

[0022] Example: A humidity monitoring device for low-voltage AC switchgear in rail transit, such as... Figures 1-6As shown, the system includes a mounting housing 1, a humidity monitor 2, a fan 3, heat-conducting fins 4, a connecting frame 5, a cooling element 6, cooling fins 7, a first connecting cover 8, a second connecting cover 81, a blower 9, a heating wire 10, a drain frame 11, a conduit 12, a water tank 13, a drain pipe 131, and a controller 18. The humidity monitor 2 is bolted to the top of the mounting housing 1, the fan 3 is bolted to the inside left side of the mounting housing 1, and the heat-conducting fins 4 and the connecting frame 5 are also bolted to the inside left side of the mounting housing 1. In the middle, the heat-conducting fin 4 is located to the right of the fan 3, and the connecting frame 5 is located to the right of the heat-conducting fin 4. The cooling fin 6 is bolted inside the connecting frame 5 and runs through the thickness direction of the connecting frame 5. The cooling fin 7 is bolted inside the mounting shell 1 and is located to the right of the cooling fin 6, in contact with it. The first connecting cover 8 is fixedly connected to the front of the outside of the mounting shell 1, and the second connecting cover 81 is fixedly connected to the rear of the outside of the mounting shell 1. The fan 9 is bolted to the first connecting cover 8. Both the fan 3 and the fan 9 are equipped with filters to filter dust in the air. The second connecting cover 81 has multiple heating wires 10 inside. The drain frame 11 is fixedly connected to the bottom of the mounting shell 1 and connects to the internal space of the mounting shell 1. The conduit 12 is fixedly connected to the bottom of the drain frame 11. The conduit 12 is a flexible corrugated pipe. The drain frame 11 adopts a flat-top pyramidal structure design with four inclined surfaces. Each inclined surface slopes outward from the top and narrows inward from the bottom, forming a drainage channel that is wider at the top and narrower at the bottom, allowing the condensate inside the mounting shell 1 to drain. Water can flow smoothly down the slope into the conduit 12. The water tank 13 is located below the mounting shell 1. The lower end of the conduit 12, away from the mounting shell 1, is connected to the water tank 13. A drain pipe 131 is bolted to the lower right side of the water tank 13. A flange is fitted to the right end of the drain pipe 131. The controller 18 is also bolted to the top of the mounting shell 1 and is located behind the humidity monitor 2. The humidity monitor 2, fan 3, cooling chip 6, blower 9, and heating wire 10 are all electrically connected to the controller 18.

[0023] like Figure 1 and Figure 6 As shown, the lifting assembly includes a mounting bracket 14, a lead screw 15, a motor 16, and a slide 17. The mounting bracket 14 is bolted to the top right side of the water tank 13. The lead screw 15 is rotatably mounted on the mounting bracket 14. The motor 16 is bolted to the upper part of the mounting bracket 14, with its output shaft extending downwards and fixedly connected to the upper end of the lead screw 15 via a coupling. The motor 16 is electrically connected to the controller 18. The slide 17 is threaded onto the outside of the lead screw 15 and fixedly connected to the right side of the mounting housing 1. The slide 17 and the mounting bracket 14 form a sliding fit, providing sliding guidance for the slide 17.

[0024] When this device is needed, first install the mounting bracket 14 in a suitable position inside the switch cabinet, and connect the external pipe to the flange at the right end of the drain pipe 131 to ensure that the drainage path is unobstructed. After the power is turned on, the system enters the standby state.

[0025] During normal operation, the humidity monitor 2 continuously monitors the relative humidity of the air inside the switch cabinet. At the same time, the controller 18 starts the motor 16 at set intervals or according to the environmental change pattern. The output shaft of the motor 16 drives the lead screw 15 to rotate clockwise, driving the slide 17 to move downward along the mounting frame 14, thereby driving the mounting shell 1 to descend vertically inside the switch cabinet. During the descent, the humidity monitor 2 continuously collects humidity data in different height areas, realizing the layered perception and dynamic monitoring of the humidity distribution inside the switch cabinet.

[0026] When the mounting shell 1 descends to the set lowest position, the motor 16 automatically reverses, and the output shaft drives the lead screw 15 to rotate counterclockwise, driving the slide 17 to move the mounting shell 1 upward and return to the initial height, completing one lifting cycle. This process is repeated to achieve continuous monitoring of different height areas inside the switch cabinet. During the continuous lifting process, the controller 18 comprehensively judges the overall humidity status inside the cabinet based on the real-time feedback data from the humidity monitor 2 and decides whether to start the automatic dehumidification program.

[0027] Once the air humidity exceeds the preset safety threshold, the controller 18 immediately triggers the automatic dehumidification program. After the program starts, the controller 18 simultaneously starts the cooling chip 6, the fan 9 and the heating wire 10. The fan 9 starts running and draws in the humid air inside the switch cabinet from the connecting cover 8, so that the humid air enters the mounting shell 1 and comes into contact with the surface of the cooling fins 7 cooled by the cooling chip 6. Since the temperature of the cooling fins 7 is lower than the air dew point, the water vapor in the air quickly condenses into liquid water and adheres to the surface of the cooling fins 7.

[0028] The condensed dry air continues to flow backward and enters the area of ​​the second connecting cover 81. It flows through the heating wire 10 and is moderately heated to prevent the low-temperature air from flowing back to the inner wall of the switch cabinet and causing condensation. Then the heated dry air is discharged by the fan 9 and sent back into the switch cabinet to form a closed-loop air duct, continuously improving the internal environment of the switch cabinet.

[0029] The condensate generated during the dehumidification process drips into the bottom of the mounting shell 1 under the action of gravity, flows out along the slope of the drain frame 11 into the inside of the conduit 12, and finally flows into the water tank 13 for storage. When the water in the water tank 13 reaches a certain level, the water can be discharged to the outside through the drain pipe 131 and the external pipe.

[0030] At the same time, when the cooling chip 6 is working, its hot end generates a lot of heat. This heat is conducted to the outside through the heat-conducting fins 4 that are in close contact with it. The controller 18 simultaneously starts the fan 3, which causes air to flow over the surface of the heat-conducting fins 4, accelerates heat dissipation, effectively reduces the temperature of the hot end, and ensures that the cooling chip 6 operates efficiently and stably.

[0031] When the controller 18 continuously monitors and finds that the humidity inside the switch cabinet has dropped below the set safe range, it determines that the dehumidification task is completed, automatically shuts down the motor 16, the cooling element 6, the fan 9, the heating wire 10 and the fan 3, and the system returns to standby mode. The humidity monitor 2 still maintains the real-time monitoring function, continuously tracks environmental changes, and ensures that the dehumidification program can be restarted in time if the humidity exceeds the standard again.

[0032] The entire process is fully automated and intelligent, requiring no manual intervention. This effectively ensures a dry and stable internal environment for the switchgear, significantly improving the reliability of equipment operation and maintenance efficiency.

Claims

1. A humidity monitoring device for a low-voltage AC switchgear in rail transit, characterized in that: The system includes a mounting housing (1), a humidity monitor (2), a fan (3), heat-conducting fins (4), a connecting frame (5), a cooling plate (6), cooling fins (7), a first connecting cover (8), a second connecting cover (81), a blower (9), a heating wire (10), a drain frame (11), a conduit (12), a water tank (13), a drain pipe (131), and a controller (18). The humidity monitor (2) is mounted on the top of the mounting housing (1), the fan (3) is mounted on one side inside the mounting housing (1), and the heat-conducting fins (4) and the connecting frame (5) are also mounted on one side inside the mounting housing (1). The heat-conducting fins (4) are located to the right of the fan (3), and the connecting frame (5) is located to the right of the heat-conducting fins (4). The cooling plate (6) is installed inside the connecting frame (5) and extends through the thickness of the connecting frame (5). The cooling fins (7) are installed inside the mounting housing (1). Located to the right of the cooling chip (6), in contact with it, the first connecting cover (8) is fixed to the outside of the mounting shell (1), the second connecting cover (81) is fixed to the other side of the mounting shell (1), the fan (9) is installed on the first connecting cover (8), the second connecting cover (81) is equipped with multiple heating wires (10), the drain frame (11) is fixed to the bottom of the mounting shell (1) and connects to the internal space of the mounting shell (1), the conduit (12) is fixed to the bottom of the drain frame (11), the water tank (13) is placed below the mounting shell (1), the end of the conduit (12) away from the mounting shell (1) is connected to the water tank (13), the drain pipe (131) is installed on the lower side of the water tank (13), the controller (18) is also installed on the top of the mounting shell (1), the humidity monitor (2), the fan (3), the cooling chip (6), the fan (9) and the heating wires (10) are all electrically connected to the controller (18).

2. The humidity monitoring device for a low-voltage AC switch cabinet of rail transit according to claim 1, characterized in that: The lifting assembly includes a mounting bracket (14), a lead screw (15), a motor (16), and a slide (17). The mounting bracket (14) is installed on the top side of the water tank (13). The lead screw (15) is rotatably mounted on the mounting bracket (14). The motor (16) is mounted on the upper part of the mounting bracket (14), with its output shaft extending downward and fixedly connected to one end of the lead screw (15). The motor (16) is electrically connected to the controller (18). The slide (17) is threaded on the outside of the lead screw (15) and fixedly connected to the right side of the mounting housing (1).

3. The humidity monitoring device for a low-voltage AC switch cabinet of rail transit according to claim 2, characterized in that: Both the fan (3) and the blower (9) are equipped with filters.

4. The humidity monitoring device for a low-voltage AC switch cabinet of rail transit according to claim 3, characterized in that: The drainage frame (11) adopts a flat-top pyramidal structure design with four sloping surfaces. Each sloping surface is inclined outward from the top and narrowed inward from the bottom, forming a drainage channel that is wider at the top and narrower at the bottom.

5. A humidity monitoring device for a low-voltage AC switchgear in rail transit according to claim 4, characterized in that: The conduit (12) is a corrugated pipe.

6. A humidity monitoring device for a low-voltage AC switchgear in rail transit according to claim 5, characterized in that: The slide (17) and the mounting bracket (14) form a sliding fit.

Images