A buried box transformer device

Abstract

The application discloses a buried box transformer equipment, which is used for reducing the influence of noise on the environment and reducing the occupied ground space. The application comprises a protective box, a top cover, a transformer main body and a power distribution device; the protective box is buried underground, the top cover is sealed and covered on the top opening of the protective box, a heat dissipation device is arranged on the top cover, the heat dissipation device extends upwards and is located above the ground, and the heat dissipation device is used for dissipating heat of the protective box; the transformer main body and the power distribution device are arranged in the protective box, high-voltage cable interfaces and low-voltage cable interfaces are arranged on the side wall of the protective box, the high-voltage cable interfaces are connected with the transformer main body through high-voltage switch cabinets, and the power distribution device is connected with the transformer main body and the low-voltage cable interfaces respectively.

Description

Technical Field

[0001] This application relates to the field of box-type transformer technology, and more particularly to an underground box-type transformer substation. Background Technology

[0002] As an integrated power distribution equipment, box-type transformers are widely used in urban power grids, industrial parks, residential communities, and public infrastructure due to their compact structure, convenient installation, and easy maintenance.

[0003] Traditional box-type transformers are typically installed above ground and protected by metal or non-metal enclosures, providing a certain level of mechanical strength and environmental protection. However, ground-mounted box-type transformers generate continuous low-frequency noise during operation due to electromagnetic vibration and cooling fan operation, which can easily cause disturbance to residents, especially at night or in quiet areas. In addition, the appearance of ground-mounted box-type transformers is poorly integrated with the surrounding environment, occupies ground space, and is not conducive to the intensive use of land resources.

[0004] Based on this, this application proposes an underground prefabricated transformer substation to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides an underground prefabricated transformer substation that can reduce the impact of noise on the environment and reduce the ground space it occupies.

[0006] The technical solution provided in this application is described below: This application provides an underground prefabricated substation device, including: Protective enclosure, top cover, transformer body and power distribution equipment; The protective enclosure is buried underground, and the top cover is sealed to the top opening of the protective enclosure. A heat dissipation device is provided on the top cover, which extends upward and is located above the ground. The heat dissipation device is used to dissipate heat from the protective enclosure. The transformer body and the power distribution device are both housed in the protective enclosure. The side wall of the protective enclosure is provided with a high-voltage cable interface and a low-voltage cable interface. The high-voltage cable interface is connected to the transformer body through a high-voltage switch cabinet. The power distribution device is connected to both the transformer body and the low-voltage cable interface.

[0007] Optionally, an insulating partition is provided inside the protective enclosure, and the transformer body and the power distribution device are both fixed on the insulating partition. A high-voltage cable channel and a low-voltage cable channel are formed between the insulating partition and the bottom of the protective enclosure.

[0008] Optionally, the bottom of the insulating partition is provided with several support columns.

[0009] Optionally, the power distribution device includes a low-voltage incoming cabinet and a low-voltage outgoing cabinet. The low-voltage incoming cabinet is connected to the low-voltage side of the transformer body, and the low-voltage outgoing cabinet is connected to the low-voltage incoming cabinet and the low-voltage cable interface, respectively.

[0010] Optionally, the transformer body and the power distribution device are separated by a partition wall, and a protective door is provided on the partition wall, with an explosion-proof observation window on the protective door.

[0011] Optionally, the underground transformer substation equipment also includes a temperature controller, which is located inside the protective enclosure and is electrically connected to the heat dissipation device.

[0012] Optionally, the buried transformer substation equipment also includes a low-voltage compensation cabinet, which is installed inside the protective enclosure and electrically connected to the power distribution device.

[0013] Optionally, the top cover is provided with an access port, the access port is provided with a cover plate, and an access staircase is provided inside the access port.

[0014] Optionally, the heat dissipation device includes a cooling fan, a ventilation duct, a waterproof cover, and a water baffle. The top cover is provided with at least one vent, one end of the ventilation pipe is sealed to the vent, and the internal channel of the ventilation pipe is connected to the vent; The ventilation duct has heat dissipation holes on its side wall, and the periphery of the water baffle is sealed to the inner wall of the ventilation duct, with the connection point being lower than the lowest edge of the heat dissipation holes. The waterproof cover is fixedly placed over the end of the ventilation pipe away from the ventilation opening, and a gap is formed between the water-blocking component and the waterproof cover to allow airflow. The cooling fan is located at the vent and is used to drive the air inside the protective box to flow into the gap.

[0015] Optionally, an inspection light is provided on the side of the top cover facing the protective enclosure.

[0016] As can be seen from the above technical solutions, this application has the following beneficial effects: This application utilizes an underground protective enclosure with a sealed top cover and a heat dissipation device to cool the interior of the enclosure. The transformer body and power distribution equipment are housed within the enclosure. High-voltage and low-voltage cable interfaces are located on the side walls of the enclosure. The high-voltage cable interfaces connect to the transformer body, and the power distribution equipment connects to both the transformer body and the low-voltage cable interfaces. By placing the transformer equipment underground, compared to existing surface-mounted transformers, this application effectively blocks noise transmission during operation, reducing noise interference to surrounding residents. It is particularly suitable for use at night or in areas requiring a quiet environment. It also saves ground space, promoting efficient land use. Furthermore, the upward-extending heat dissipation device on the top cover solves the heat dissipation problem for underground equipment, ensuring the stability and reliability of the equipment's operation. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an underground box-type substation device according to this application; Figure 2 for Figure 1 A schematic diagram along the AA direction; Figure 3 for Figure 1 A schematic diagram along the DD direction; Figure 4 This is a top view schematic diagram of an underground box-type substation device according to this application; Figure 5 This is a schematic diagram of the top cover of an underground box-type substation equipment according to this application; Figure 6 This is another schematic diagram of the top cover of an underground transformer substation according to this application; Figure 7 This is a schematic diagram of the cooperation between the ventilation pipe and the water-blocking component in an underground transformer substation according to this application; Figure 8 This is a schematic diagram of a ventilation duct in an underground transformer substation according to this application; Figure 9 This is a schematic diagram of a water-blocking component in an underground transformer substation according to this application; In the diagram, the components are: enclosure 01, top cover 02, transformer body 03, high-voltage cable interface 04, low-voltage cable interface 05, insulating partition 06, high-voltage cable channel 07, low-voltage cable channel 08, support column 09, low-voltage incoming cabinet 10, low-voltage outgoing cabinet 11, partition wall 12, protective door 13, explosion-proof observation window 14, high-voltage switch cabinet 15, low-voltage compensation cabinet 16, inspection port 17, inspection stairs 18, cooling fan 19, ventilation duct 20, waterproof cover 21, water-blocking component 22, and inspection light 23. Detailed Implementation

[0018] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.

[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0022] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] To address the noise pollution problem caused by existing above-ground box-type transformers, this application provides an underground box-type transformer substation, which buries the entire unit underground, effectively blocking the propagation of noise generated during operation and reducing noise interference to surrounding residents. The specific structure of this application is described below: See Figures 1 to 9 The buried transformer substation equipment provided in this application includes: The protective enclosure 01, top cover 02, transformer body 03, and power distribution equipment are included. The protective enclosure 01 is buried underground, and the top cover 02 is sealed to the top opening of the protective enclosure 01. A heat dissipation device is installed on the top cover 02, which extends upward and is located above the ground. The heat dissipation device is used to dissipate heat from the protective enclosure 01. The transformer body 03 and the power distribution equipment are both installed inside the protective enclosure 01. A high-voltage cable interface 04 and a low-voltage cable interface 05 are installed on the side wall of the protective enclosure 01. The high-voltage cable interface 04 is connected to the transformer body 03 through a high-voltage switch cabinet 15. The power distribution equipment is connected to the transformer body 03 and the low-voltage cable interface 05 respectively.

[0024] The protective enclosure 01 is entirely buried underground and is made of corrosion-resistant materials such as stainless steel, galvanized steel sheet, and high-strength engineering plastics. All surfaces of the protective enclosure 01 are sealed by welding to prevent groundwater and moisture from entering the enclosure, thus reducing the risk of moisture damage to the internal equipment.

[0025] The top cover 02 seals onto the top opening of the protective enclosure 01, forming a closed unit with the enclosure 01. The seal prevents external dust, debris, and rainwater from entering the interior of the protective enclosure 01, protecting the cleanliness and dryness of the internal equipment.

[0026] A heat dissipation device is installed on the top cover 02, extending upwards and located above the ground. The heat dissipation device uses high-efficiency heat dissipation materials and structures, such as a combination of heat sinks and cooling fans 19. The heat dissipation device can quickly dissipate the heat generated inside the protective enclosure 01 by the operation of the transformer body 03 and the power distribution equipment to the outside air, ensuring stable operation of the equipment at a suitable temperature and preventing equipment damage or performance degradation due to overheating.

[0027] The top cover 02 possesses a certain degree of strength and weather resistance, enabling it to withstand ground pressure and the influence of the external environment. Furthermore, to facilitate the installation and maintenance of internal power distribution equipment or transformers, the top cover 02 is also designed with an openable structure.

[0028] The transformer body 03 is housed within the protective enclosure 01. Its main function is to convert the input high-voltage electrical energy into low-voltage electrical energy suitable for user use, thereby achieving voltage transformation and regulation. The transformer body 03 is equipped with a high-voltage side and a low-voltage side. The high-voltage side is connected to the high-voltage cable interface 04, while the low-voltage side is connected to the power distribution equipment.

[0029] The power distribution device is also housed within the protective enclosure 01, and is connected to the transformer body 03 (low-voltage side) and the low-voltage cable interface 05, respectively. The power distribution device receives low-voltage power from the transformer body 03 and distributes the power to different circuits according to the user's needs.

[0030] High-voltage cable interface 04 and low-voltage cable interface 05 are located on the side wall of the protective enclosure 01. High-voltage cable interface 04 connects to the transformer body 03 (high-voltage side) and is used to introduce external high-voltage power into the transformer body 03 for voltage reduction. Low-voltage cable interface 05 connects to the power distribution device and transmits the low-voltage power distributed by the power distribution device to the user end. The cable interfaces adopt a sealed design to prevent moisture and dust from entering the interface and affecting the performance of the electrical connection.

[0031] The high-voltage switchgear 15 is located at the front end of the transformer body 03 along the direction of the high-voltage cable inlet. After the high-voltage cable is introduced from the outside, it first enters the high-voltage switchgear 15. After being controlled and distributed by the switchgear, it is then transmitted to the transformer body 03 for voltage reduction. The high-voltage switchgear 15 enables centralized control and protection of high-voltage power. In the event of a fault, it can quickly cut off the power supply, isolate the fault area, prevent the fault from spreading, and ensure the safety of the transformer body 03 and other equipment.

[0032] In this embodiment, by burying the protective enclosure 01 (containing the internal transformer body 03 and power distribution equipment) underground, ground space is greatly saved, and land resource utilization is improved. This method is particularly suitable for use in urban centers, densely populated areas, and other places where land resources are scarce. The underground installation effectively blocks the transmission of noise generated during the operation of the transformer body 03 and power distribution equipment, reducing noise interference to the surrounding environment. The heat dissipation device installed on the top cover 02 can dissipate the heat generated by the underground transformer body 03 and power distribution equipment to the outside in a timely manner, ensuring operation at a suitable temperature.

[0033] Please continue reading. Figure 2 In one optional embodiment, an insulating partition 06 is provided inside the protective enclosure 01. The transformer body 03 and the power distribution device are all fixed on the insulating partition 06. A high-voltage cable channel 07 and a low-voltage cable channel 08 are formed between the insulating partition 06 and the bottom of the protective enclosure 01.

[0034] Insulating partition 06 divides the interior of the protective enclosure 01 into upper and lower layers. The transformer body 03 and the power distribution device are both located in the upper layer and are fixed to the insulating partition 06. In the lower layer, the space is divided into a high-voltage cable channel 07 and a low-voltage cable channel 08. The high-voltage cable channel 07 is used to lay high-voltage cables (the cables between the high-voltage cable interface 04 and the transformer body 03), and the low-voltage cable channel 08 is used to lay low-voltage cables (the cables between the transformer body 03 and the power distribution device, and the cables between the power distribution device and the low-voltage cable interface 05).

[0035] High-voltage cable channel 07 and low-voltage cable channel 08 are located on opposite sides of the protective enclosure 01, with the low-voltage cable channel 08 located below the power distribution device. To prevent fires caused by cable faults, fire-resistant materials, such as fireproof boards and fireproof tape, can be laid inside the cable channels.

[0036] Insulating partition 06 is made of one or more materials selected from epoxy resin, glass fiber reinforced plastic, or polycarbonate. For maintenance of the underlying cables, an openable / closable maintenance port can be provided on insulating partition 06.

[0037] In this optional embodiment, a plurality of support columns 09 are provided at the bottom of the insulating partition 06. The plurality of support columns 09 support the insulating partition 06, and adjacent support columns 09 are arranged at equal distances.

[0038] In an optional embodiment, the power distribution device includes a low-voltage incoming cabinet 10 and a low-voltage outgoing cabinet 11. The low-voltage incoming cabinet 10 is connected to the low-voltage side of the transformer body 03, and the low-voltage outgoing cabinet 11 is connected to the low-voltage incoming cabinet 10 and the low-voltage cable interface 05, respectively.

[0039] In this embodiment, the low-voltage incoming switchgear 10 is closely connected to the low-voltage side of the transformer body 03, introducing the low-voltage electrical energy output from the transformer body 03 into the power distribution system. The low-voltage outgoing switchgear 11 is connected to the low-voltage incoming switchgear 10 on one hand, receiving the pre-processed electrical energy; on the other hand, it is connected to the low-voltage cable interface 05, distributing the electrical energy to various power terminals. The low-voltage incoming switchgear 10 and the low-voltage outgoing switchgear 11 cooperate to complete the tasks of introducing, distributing, and protecting electrical energy. Three low-voltage switchgear 11s are provided.

[0040] Please continue reading. Figure 1 and Figure 3 In an optional embodiment, the transformer body 03 is separated from the power distribution device by a partition wall 12, and a protective door 13 is provided on the partition wall 12, and an explosion-proof observation window 14 is provided on the protective door 13.

[0041] The partition wall 12 is made of materials with good fire resistance, heat insulation and explosion-proof properties, such as fireproof steel plate, aerated concrete blocks, etc. The partition wall 12 is sealed with the protective box 01 and the protective door 13, such as by using sealing strips; the top cover 02 is equipped with 4 heat dissipation devices, 2 of which are located above the transformer body 03, and the other two are located above the power distribution device.

[0042] The protective door 13 is made of the same fireproof steel plate as the partition wall 12. The interior of the door is filled with heat-insulating materials, such as rock wool or glass wool, to further improve the heat insulation effect and reduce heat transfer. The protective door 13 is equipped with locks, such as mechanical combination locks or electronic locks, to ensure that only authorized personnel can open the door for operation and maintenance.

[0043] The explosion-proof observation window 14 is transparent, allowing maintenance personnel to observe the operation of the transformer body 03 in the power distribution area, as well as the readings of the thermometers designed around the transformer body 03.

[0044] In an optional embodiment, this application further includes a temperature controller, which is disposed inside the protective enclosure 01 and electrically connected to the heat dissipation device. The temperature controller has a built-in temperature sensor that can measure the temperature inside the protective enclosure 01 in real time, and a built-in control module that can send control signals to the heat dissipation device to control its operation.

[0045] In an optional embodiment, the underground transformer substation equipment further includes a low-voltage compensation cabinet 16, which is disposed inside the protective enclosure 01 and electrically connected to the power distribution device.

[0046] In this embodiment, the low-voltage compensation cabinet 16 can improve the power factor of the power system, improve voltage quality, reduce line losses, and improve the operating efficiency and energy utilization of the equipment. The low-voltage compensation cabinet 16 is electrically connected to the power distribution device through a low-voltage cable. During connection, appropriate cables and connection methods are selected according to the interface type and specifications of the low-voltage compensation cabinet 16 and the power distribution device.

[0047] The low-voltage compensation cabinet 16 can automatically connect or disconnect capacitor banks according to the reactive power demand of the power system, thereby compensating for the reactive power of the system and improving the power factor. Reactive power compensation can regulate the system voltage, reduce the voltage fluctuation range, and improve voltage stability.

[0048] Inside the square protective enclosure 01, the power distribution equipment (low-voltage incoming cabinet 10 and low-voltage outgoing cabinet 11) is located on one side, while the high-voltage switch cabinet 15 and low-voltage compensation cabinet 16 are located on the other side. A passageway separates the two sides for maintenance personnel to walk and for equipment maintenance. The transformer body 03 and cable interfaces (high-voltage cable interface 04 and low-voltage cable interface 05) are located at opposite ends of the protective enclosure 01.

[0049] Please continue reading. Figure 5 In an optional embodiment, the top cover 02 is provided with an access port 17, the access port 17 is provided with a cover plate, and an access staircase 18 is provided inside the access port 17.

[0050] The access port 17 allows maintenance personnel to enter the interior of the protective enclosure 01. The access port 17 extends upward to a certain height, and the cover is a flip-top type. When maintenance is required, the cover can be opened to enter the interior of the protective enclosure 01 through the access port 17. When maintenance is not required, the cover is closed in the access port 17. A sealing gasket is provided at the closed position to improve the sealing degree when the cover is closed.

[0051] The maintenance staircase 18 is located inside the protective enclosure 01. The bottom of the maintenance staircase 18 is supported on the bottom surface of the protective enclosure 01, and the top of the maintenance staircase 18 is fixedly connected to the edge of the inspection port 17 so that maintenance personnel can enter the interior of the protective enclosure 01 through the maintenance staircase 18.

[0052] Please continue reading. Figures 6 to 9 In one optional embodiment, the heat dissipation device includes a cooling fan 19, a ventilation pipe 20, a waterproof cover 21, and a water-blocking component 22; at least one ventilation opening is provided on the top cover 02, one end of the ventilation pipe 20 is sealed to the ventilation opening, and the internal channel of the ventilation pipe 20 is connected to the ventilation opening; heat dissipation holes are provided on the side wall of the ventilation pipe 20, the periphery of the water-blocking component 22 is sealed to the inner wall of the ventilation pipe 20, and the connection point is lower than the lowest edge of the heat dissipation hole; the waterproof cover 21 is fixedly covered on the end of the ventilation pipe 20 away from the ventilation opening, and a gap is formed between the water-blocking component 22 and the waterproof cover 21 to allow airflow; the cooling fan 19 is provided at the ventilation opening, and the cooling fan 19 is used to drive the air in the protective box 01 to flow into the gap.

[0053] The ventilation duct 20 is above the ground, and a rain cover is installed at the end of the ventilation duct 20. The rain cover prevents rainwater from entering the ventilation duct 20 and does not affect the ventilation of the ventilation duct 20. The cooling fan 19 is used to drive the exhaust of hot air inside the protective enclosure 01.

[0054] When the cooling fan 19 is started, it drives air to flow into the gap between the water baffle 22 and the waterproof cover 21. The forced airflow can accelerate the exchange of hot air inside the box with cold air outside, thereby quickly removing the heat generated by the equipment and achieving the purpose of heat dissipation.

[0055] The periphery of the water-blocking component 22 is sealed to the inner wall of the ventilation duct 20, and the connection point is lower than the lowest edge of the heat dissipation hole. This ensures that when encountering rainwater or other liquids, the water-blocking component 22 can effectively prevent liquid from entering the ventilation duct 20, while not hindering normal airflow. The waterproof cover 21 completely covers the end of the ventilation duct 20 to prevent liquid from entering the ventilation duct 20 from the end.

[0056] Correspondingly, one or two of the multiple vents can be set as air inlets, and the remaining ones as air outlets. An exhaust device is installed inside the protective enclosure 01, which blows the air from the air inlet side to the air outlet side, thereby realizing the heat dissipation process of air inlet-exhaust heat exchange-air outlet. Alternatively, all vents can be set as air outlets, and an additional air inlet (waterproofed) can be opened on the top cover 02. The air inlet extends to the bottom of the protective enclosure 01 through a pipe. In this way, the cold air sent in from the outside will first reach the bottom of the protective enclosure 01, while the hot air will rise and be exhausted by the cooling fan 19, thereby forming air convection.

[0057] In an optional embodiment, a maintenance light 23 is provided on the side of the top cover 02 facing the protective enclosure 01. In this embodiment, the maintenance light 23 can be turned on manually or automatically. In the manual mode, a switch is provided outside or inside the protective enclosure 01, allowing the operator to manually turn the maintenance light 23 on or off. In the automatic mode, an automatic sensing control method can be used. For example, an infrared sensor is installed at the entrance of the protective enclosure 01. When an operator enters the protective enclosure 01, the sensor detects a human body signal and automatically turns on the maintenance light 23.

Claims

1. A buried transformer substation device, characterized in that, include: Protective enclosure, top cover, transformer body and power distribution equipment; The protective enclosure is buried underground, and the top cover is sealed to the top opening of the protective enclosure. A heat dissipation device is provided on the top cover, which extends upward and is located above the ground. The heat dissipation device is used to dissipate heat from the protective enclosure. The transformer body and the power distribution device are both housed in the protective enclosure. The side wall of the protective enclosure is provided with a high-voltage cable interface and a low-voltage cable interface. The high-voltage cable interface is connected to the transformer body through a high-voltage switch cabinet. The power distribution device is connected to both the transformer body and the low-voltage cable interface.

2. The underground transformer substation equipment according to claim 1, characterized in that, An insulating partition is installed inside the protective enclosure. The transformer body and the power distribution device are both fixed on the insulating partition. A high-voltage cable channel and a low-voltage cable channel are formed between the insulating partition and the bottom of the protective enclosure.

3. The underground transformer substation equipment according to claim 2, characterized in that, The bottom of the insulating partition is provided with several support columns.

4. The underground transformer substation equipment according to any one of claims 1 to 3, characterized in that, The power distribution device includes a low-voltage incoming cabinet and a low-voltage outgoing cabinet. The low-voltage incoming cabinet is connected to the low-voltage side of the transformer body, and the low-voltage outgoing cabinet is connected to the low-voltage incoming cabinet and the low-voltage cable interface, respectively.

5. The underground transformer substation equipment according to any one of claims 1 to 3, characterized in that, The transformer body and the power distribution device are separated by a partition wall, and a protective door is provided on the partition wall, with an explosion-proof observation window on the protective door.

6. The underground transformer substation equipment according to any one of claims 1 to 3, characterized in that, The underground transformer substation also includes a temperature controller, which is located inside the protective enclosure and is electrically connected to the heat dissipation device.

7. The underground transformer substation equipment according to any one of claims 1 to 3, characterized in that, The underground transformer substation also includes a low-voltage compensation cabinet, which is installed inside the protective enclosure and electrically connected to the power distribution device.

8. The underground transformer substation equipment according to any one of claims 1 to 3, characterized in that, The top cover is provided with an inspection port, the inspection port is provided with a cover plate, and the inspection port is provided with an inspection staircase.

9. The underground transformer substation equipment according to any one of claims 1 to 3, characterized in that, The heat dissipation device includes a cooling fan, a ventilation pipe, a waterproof cover, and a water baffle. The top cover is provided with at least one vent, one end of the ventilation pipe is sealed to the vent, and the internal channel of the ventilation pipe is connected to the vent; The ventilation duct has heat dissipation holes on its side wall, and the periphery of the water baffle is sealed to the inner wall of the ventilation duct, with the connection point being lower than the lowest edge of the heat dissipation holes. The waterproof cover is fixedly placed over the end of the ventilation pipe away from the ventilation opening, and a gap is formed between the water-blocking component and the waterproof cover to allow airflow. The cooling fan is located at the vent and is used to drive the air inside the protective box to flow into the gap.

10. The underground transformer substation equipment according to any one of claims 1 to 3, characterized in that, An inspection light is provided on the side of the top cover facing the protective enclosure.

Images