A top cover structure of a buried box transformer

Abstract

The application discloses a top cover structure of a buried box transformer, which is used for reducing ventilation resistance and improving heat dissipation efficiency. The application comprises a cover plate, a ventilation pipe, a waterproof cover, a water blocking part and a heat dissipation fan. At least one ventilation opening is arranged on the cover plate. One end of the ventilation pipe is in sealing connection with the ventilation opening, and the internal passage of the ventilation pipe is in communication with the ventilation opening. Heat dissipation holes are arranged on the side wall of the ventilation pipe. The periphery of the water blocking part is in sealing connection with the inner wall of the ventilation pipe, and the position of the connecting part is lower than the lowest edge of the heat dissipation holes. The waterproof cover is fixedly covered on the end of the ventilation pipe away from the ventilation opening. The gap for air flow is formed between the water blocking part and the waterproof cover. The heat dissipation fan is arranged at the ventilation opening. The heat dissipation fan is used for driving air flow to enter the ventilation pipe from the inside of the buried box transformer through the ventilation opening, and then the air flow is discharged from the heat dissipation holes after flowing through the gap.

Description

Technical Field

[0001] This application relates to the field of box-type transformer equipment technology, and in particular to a top cover structure for an underground box-type transformer. Background Technology

[0002] An underground prefabricated substation (referred to as "underground prefabricated substation") is a compact power distribution device that organically combines high-voltage power reception, transformer step-down, and low-voltage power distribution functions, and is entirely buried underground. During operation, the internal transformers, distribution cabinets, and other equipment of an underground prefabricated substation continuously generate a large amount of heat. If this heat cannot be dissipated effectively and in a timely manner, the internal temperature of the substation will rise sharply, affecting the service life of the equipment and even causing equipment failure. Therefore, effective heat dissipation is necessary for underground prefabricated substations.

[0003] Currently, the common heat dissipation method for underground transformer substations is to install ventilation openings on their top cover and add cooling fans to expel heat from the inside of the enclosure. Furthermore, to reduce rainwater entering the underground transformer substation through the ventilation openings, louvers are installed above the openings. However, during operation, the louver blade structure can disrupt airflow, thereby increasing ventilation resistance and affecting heat dissipation efficiency. Utility Model Content

[0004] To address the aforementioned technical issues, this application provides a top cover structure for an underground transformer substation, which reduces ventilation resistance and improves heat dissipation efficiency.

[0005] The technical solution provided in this application is described below: This application provides a top cover structure for an underground transformer substation, including: Cover plate, ventilation duct, waterproof cover, water-blocking components, and cooling fan; The cover plate 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. The cooling fan drives the airflow from inside the underground transformer box into the ventilation pipe through the vent, flows through the gap, and is discharged from the heat dissipation hole.

[0006] Optionally, the waterproof cover has an inwardly protruding conical guide surface on the side facing the vent, the conical guide surface being used to radially guide the rising airflow to the gap.

[0007] Optionally, the edge of the waterproof cover is provided with a downwardly extending barrier, which is located outside the ventilation duct.

[0008] Optionally, the enclosure and the ventilation pipe are connected by bolts.

[0009] Optionally, an inspection light is provided on the inner side of the cover plate.

[0010] Optionally, the water-blocking component includes a conical sleeve and a straight sleeve, the periphery of the conical sleeve being sealed to the inner wall of the ventilation pipe, the straight sleeve being connected to the conical sleeve, and a gap being formed between the top end of the straight sleeve and the waterproof cover.

[0011] Optionally, the cover plate is provided with an inspection port, and a door panel is provided on the inspection port.

[0012] Optionally, a crossbar is provided inside the access panel, and the crossbar is used to connect the access stairs.

[0013] Optionally, the height of the access port is lower than the height of the ventilation duct.

[0014] Optionally, the cover plate is provided with four ventilation openings.

[0015] As can be seen from the above technical solutions, this application has the following beneficial effects: This application improves the heat dissipation efficiency of the underground transformer substation by providing at least one ventilation opening on the cover plate, placing a ventilation pipe with heat dissipation holes on the ventilation opening, placing a water-blocking component inside the ventilation pipe with the connection between the water-blocking component and the ventilation pipe lower than the lowest edge of the heat dissipation hole, covering the end of the ventilation pipe with a waterproof cover, forming a gap between the water-blocking component and the waterproof cover, and placing a cooling fan at the ventilation opening. The cooling fan blows hot air from inside the underground transformer substation towards this gap, and then discharges it through the heat dissipation hole. This replaces the traditional louver design, ensuring effective waterproofing while avoiding the disturbance of airflow by the louver blade structure, reducing ventilation resistance, and thus improving the heat dissipation efficiency of the underground transformer substation. Furthermore, the water-blocking component inside the ventilation pipe further restricts rainwater from entering the ventilation pipe from the heat dissipation hole, improving the waterproofing effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the top cover structure of an underground transformer substation according to this application; Figure 2 This is a bottom view schematic diagram of the top cover structure of an underground box-type transformer according to this application; Figure 3 This is a schematic diagram of the cooperation between the ventilation pipe and the water-blocking component in the top cover structure of an underground transformer substation according to this application; Figure 4This is a schematic diagram of the conical guide surface in the top cover structure of an underground box-type substation according to this application; Figure 5 This is a schematic diagram of a ventilation duct in the top cover structure of an underground transformer substation according to this application; Figure 6 This is a schematic diagram of a water-blocking component in the top cover structure of an underground transformer substation according to this application; Figure 7 This is a schematic diagram of the cooperation between the crossbar and the maintenance staircase in the top cover structure of an underground transformer substation according to this application. In the diagram, 01 is the cover plate, 02 is the ventilation pipe, 03 is the waterproof cover, 04 is the water baffle, 05 is the cooling fan, 06 is the heat dissipation hole, 07 is the conical guide surface, 08 is the enclosure, 09 is the inspection light, 10 is the conical sleeve, 11 is the straight sleeve, 12 is the inspection port, 13 is the crossbar, 14 is the inspection staircase, and 15 is the door panel. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] The existing louvered structure on the roof of a substation disrupts airflow, increasing ventilation resistance and affecting heat dissipation efficiency. This application provides a roof structure for an underground transformer substation that replaces louvers with ventilation ducts, a waterproof cover, and water-blocking components, thereby reducing ventilation resistance and improving heat dissipation efficiency. The specific structure of this application is described below: See Figures 1 to 7 This application provides a top cover structure for an underground transformer substation, comprising: The transformer includes a cover plate 01, a ventilation duct 02, a waterproof cover 03, a water-blocking component 04, and a cooling fan 05. The cover plate 01 has at least one ventilation opening. One end of the ventilation duct 02 is sealed to the ventilation opening, and the internal channel of the ventilation duct 02 communicates with the ventilation opening. A heat dissipation hole 06 is provided on the side wall of the ventilation duct 02. The periphery of the water-blocking component 04 is sealed to the inner wall of the ventilation duct 02, and the connection point is lower than the lowest edge of the heat dissipation hole 06. The waterproof cover 03 is fixedly placed over the end of the ventilation duct 02 away from the ventilation opening, and a gap is formed between the water-blocking component 04 and the waterproof cover 03 to allow airflow. The cooling fan 05 is located at the ventilation opening and drives airflow from inside the underground transformer box into the ventilation duct 02 through the ventilation opening, flows through the gap, and exits through the heat dissipation hole 06.

[0023] The cover plate 01 is located on top of the underground transformer substation, and the connection between the cover plate 01 and the underground transformer substation is sealed. The cover plate 01 has at least one ventilation opening. The number of ventilation openings is determined based on the actual heat dissipation requirements and design specifications of the underground transformer substation, ensuring heat dissipation while also considering structural stability and waterproofing. The ventilation openings are in shapes such as round or square to facilitate a sealed connection with the ventilation duct 02.

[0024] One end of the ventilation duct 02 is sealed to the vent on the cover plate 01, for example, by using a rubber sealing ring or sealant to ensure that there are no gaps between the ventilation duct 02 and the vent, preventing air leakage and rainwater infiltration. The internal channel of the ventilation duct 02 is connected to the vent, forming an airflow path. When the cooling fan 05 is working, it will draw hot air from inside the underground transformer into the ventilation duct 02 through the vent.

[0025] The ventilation duct 02 has heat dissipation holes 06 on its side wall. These holes have a small diameter, such as a few millimeters, to ensure smooth airflow while effectively preventing rainwater from entering. The periphery of the water-blocking component 04 is sealed to the inner wall of the ventilation duct 02, and the connection point is lower than the lowest edge of the heat dissipation hole 06. This allows the water-blocking component 04 to form an effective waterproof barrier inside the ventilation duct 02, preventing rainwater from entering the heat dissipation hole 06. The water-blocking component 04 is welded to the ventilation duct 02. It should be noted that the lowest edge of the heat dissipation hole 06 is at a certain height from the cover plate 01. This prevents water from entering the heat dissipation hole 06 when water accumulates on the ground. This height can be 20cm, 50cm, etc., depending on what is feasible.

[0026] When rainwater enters the ventilation pipe 02 through the heat dissipation hole 06, the water-blocking component 04 will prevent further intrusion of the rainwater. Since the water-blocking component 04 is lower than the heat dissipation hole 06, the rainwater drips onto the water-blocking component 04 and then flows down along the surface of the water-blocking component 04 (and flows out again through the heat dissipation hole 06), without entering the interior of the ventilation pipe 02, thus protecting the equipment inside the underground transformer substation from the influence of rainwater.

[0027] The waterproof cover 03 is fixedly placed over the end of the ventilation pipe 02 away from the ventilation opening. A gap is formed between the waterproof cover 03 and the water-blocking component 04 to allow airflow. When the cooling fan 05 drives the airflow from inside the underground transformer box into the ventilation pipe 02 through the ventilation opening, the airflow will flow through this gap and then be discharged from the heat dissipation hole 06 on the side wall of the ventilation pipe 02, taking away the heat inside the transformer box.

[0028] The cooling fan 05 is located at the ventilation opening and is usually mounted on the cover plate 01 by bolts or other fixing methods. When the cooling fan 05 is started, the suction force generated drives the airflow from inside the underground transformer substation through the ventilation opening into the ventilation duct 02. As the airflow flows within the ventilation duct 02, it carries away the heat generated by the equipment inside the transformer substation and discharges it to the external environment through the heat dissipation holes 06 on the side wall of the ventilation duct 02. This achieves effective heat dissipation for the underground transformer substation and ensures the normal operating temperature of the internal equipment.

[0029] In this embodiment, by providing at least one vent on the cover plate 01, a ventilation pipe 02 with heat dissipation holes 06 is placed on the vent, a water-blocking member 04 is placed inside the ventilation pipe 02, and the connection between the water-blocking member 04 and the ventilation pipe 02 is lower than the lowest edge of the heat dissipation hole 06. A waterproof cover 03 is placed over the end of the ventilation pipe 02, forming a gap between the water-blocking member 04 and the waterproof cover 03. A cooling fan 05 is placed at the vent, so that the cooling fan 05 blows the hot air inside the underground transformer into the gap, and then discharges it from the heat dissipation hole 06 after passing through the gap. This replaces the traditional louver design, ensuring effective waterproofing while avoiding the disturbance of airflow by the louver blade structure, reducing ventilation resistance, and thus improving the heat dissipation efficiency of the underground transformer. Furthermore, the water-blocking member 04 inside the ventilation pipe 02 can further restrict rainwater from entering the ventilation pipe 02 from the heat dissipation hole 06, improving the waterproofing effect.

[0030] Please continue reading. Figure 4 In an optional embodiment, the waterproof cover 03 is provided with an inwardly protruding conical guide surface 07 on the side facing the vent, the conical guide surface 07 being used to radially guide the rising airflow to the gap.

[0031] The conical guide surface 07 protrudes into the waterproof cover 03, forming a truncated cone shape. The inclination angle of the conical guide surface 07 is between 30° and 60°. Hot air inside the buried transformer substation enters the ventilation duct 02 through the vent. The rising airflow is radially guided along the inclination direction of the conical surface to the gap formed between the water-blocking component 04 and the waterproof cover 03. This prevents the airflow from forming turbulent vortices below the waterproof cover 03, reduces energy loss, and accelerates the exhaust speed of hot air inside the transformer substation, thereby improving heat dissipation efficiency. Figure 4 The arrows in the diagram indicate the direction of airflow.

[0032] In this optional embodiment, the edge of the waterproof cover 03 is provided with a downwardly extending barrier 08, which is located outside the ventilation duct 02.

[0033] The enclosure 08 is set at the edge of the waterproof cover 03 and extends downward. The enclosure 08 surrounds the outside of the ventilation pipe 02 and forms an integral structure with the waterproof cover 03. The enclosure 08 and the waterproof cover 03 are manufactured by integral molding, or they can be fixedly connected by welding, bolts or other methods.

[0034] It should be noted that the lowest point of the downward extension of the enclosure 08 should be lower than the highest point of the water-blocking component 04, and the heat dissipation hole 06 should be located below the lowest point of the enclosure 08.

[0035] In this optional embodiment, the enclosure 08 and the ventilation duct 02 are connected by bolts. In this embodiment, the bolted connection facilitates the installation and removal of the waterproof cover 03, improving maintenance efficiency.

[0036] In an optional embodiment, a maintenance light 09 is provided on the inner side of the cover plate 01.

[0037] The inspection light 09 is fixed to the inside of the cover plate 01 by bolts, and the inspection light 09 uses an LED light source. At night or when there is insufficient underground light, the inspection light 09 can provide uniform illumination, covering the internal area of ​​the transformer substation (such as transformers, circuit breakers, cable joints, etc.), so that maintenance personnel can clearly see the relevant equipment inside the underground transformer substation.

[0038] Please continue reading. Figure 6 In an optional embodiment, the water-blocking component 04 includes a conical sleeve 10 and a straight sleeve 11. The periphery of the conical sleeve 10 is sealed to the inner wall of the ventilation pipe 02, and the straight sleeve 11 is connected to the conical sleeve 10. A gap is formed between the top of the straight sleeve 11 and the waterproof cover 03.

[0039] The conical sleeve 10 is conical (smaller at the top and larger at the bottom). The bottom of the conical sleeve 10 is sealed to the inner wall of the ventilation pipe 02. The shape of the bottom of the conical sleeve 10 is consistent with the cross-sectional shape of the ventilation pipe 02 to ensure a sealed connection between the conical sleeve 10 and the ventilation pipe 02. The upper part of the conical sleeve 10 has the same shape as the straight sleeve 11, and the two are sealed to each other. The straight sleeve 11 extends upward, and a gap for airflow is formed between the top of the straight sleeve 11 and the waterproof cover 03.

[0040] Please continue reading. Figure 7 In one optional embodiment, the cover plate 01 is provided with an access port 12, and a door panel 15 is provided on the access port 12. The access port 12 facilitates maintenance personnel entering the underground transformer substation for equipment maintenance. The access port 12 extends upwards to a certain height, and the door panel 15 is located on the access port 12. The door panel 15 is equipped with a lock to prevent unauthorized personnel from opening the door panel 15.

[0041] The door panel 15 and the cover of the inspection port 12 are sealed, such as by installing sealing rubber, to prevent rainwater from entering the underground transformer substation from the inspection port 12.

[0042] In this optional embodiment, a crossbar 13 is provided inside the access panel 12, and the crossbar 13 is used to connect the access stairs 14.

[0043] To facilitate maintenance personnel's access to the underground transformer substation, a maintenance staircase 14 is installed inside the underground transformer substation. The bottom of the maintenance staircase 14 abuts against the underground transformer substation, and the top of the maintenance staircase 14 is connected to the crossbar 13 in the maintenance opening 12.

[0044] In this optional embodiment, the height of the access port 12 is lower than the height of the ventilation duct 02.

[0045] In an optional embodiment, the cover plate 01 is provided with four vents. Each vent is equipped with a cooling fan 05.

Claims

1. A top cover structure for an underground transformer substation, characterized in that, include: Cover plate, ventilation duct, waterproof cover, water-blocking components, and cooling fan; The cover plate 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. The cooling fan drives the airflow from inside the underground transformer box into the ventilation pipe through the vent, flows through the gap, and is discharged from the heat dissipation hole.

2. The top cover structure according to claim 1, characterized in that, The waterproof cover has an inwardly protruding conical guide surface on the side facing the vent, which is used to guide the rising airflow radially to the gap.

3. The top cover structure according to claim 2, characterized in that, The waterproof cover has a downward-extending barrier along its edge, which is located outside the ventilation duct.

4. The top cover structure according to claim 3, characterized in that, The enclosure and the ventilation pipe are connected by bolts.

5. The top cover structure according to any one of claims 1 to 4, characterized in that, An inspection light is provided on the inner side of the cover plate.

6. The top cover structure according to any one of claims 1 to 4, characterized in that, The water-blocking component includes a conical sleeve and a straight sleeve. The periphery of the conical sleeve is sealed to the inner wall of the ventilation pipe. The straight sleeve is connected to the conical sleeve, and a gap is formed between the top of the straight sleeve and the waterproof cover.

7. The top cover structure according to any one of claims 1 to 4, characterized in that, The cover plate is provided with an inspection port, and a door panel is provided on the inspection port.

8. The top cover structure according to claim 7, characterized in that, A crossbar is installed inside the access panel, and the crossbar is used to connect the access stairs.

9. The top cover structure according to claim 7, characterized in that, The height of the inspection port is lower than the height of the ventilation duct.

10. The top cover structure according to any one of claims 1 to 4, characterized in that, The cover plate has four ventilation openings.

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