A ring main unit with anti-corrosion

Abstract

This invention discloses a rust-resistant ring main unit, relating to the technical field of ring main units. It includes an outer casing and a built-in ring main switch unit. The outer casing has several heat dissipation holes on its side walls, and longitudinally arranged partitions parallel to the inner walls of the outer casing. Each partition has several ventilation holes corresponding to the heat dissipation holes. The heat dissipation holes and ventilation holes are staggered vertically. The sides of the partitions are flexibly and tightly connected to the inner walls of the casing via a waterproof curtain. The waterproof curtain is angled and sealed to the heat dissipation holes and ventilation holes, forming an arc-shaped, bent ventilation and heat dissipation channel. This invention simultaneously provides ventilation and heat dissipation while also providing waterproofing and rust prevention.

Description

Technical Field

[0001] This invention relates to the technical field of ring main units, and in particular to a rust-resistant ring main unit. Background Technology

[0002] Ring main units are core power distribution equipment in urban power distribution networks, enabling ring network power supply. They employ a one-in-one-out wiring structure, allowing for rapid isolation of the corresponding transformer during equipment failures or maintenance, significantly reducing the scope of power outages and effectively improving power supply continuity and reliability. They also support distribution network automation functions. Their compact size makes them suitable for both indoor and outdoor applications, making them a critical power distribution device in areas requiring high power supply reliability.

[0003] To meet the heat dissipation requirements of internal electrical components, existing outdoor ring main units typically have direct ventilation holes on the side walls of the unit. Some products are only equipped with simple fixed louvers, relying on direct ventilation ducts to achieve air convection for heat dissipation. They do not have internal barriers, bend ventilation, or layered moisture-proof structures, and rust prevention relies solely on simple coating on the surface of the unit.

[0004] Traditional ring main units with straight-through ventilation holes cannot prevent rainwater, moisture, and sand from directly entering the unit. Long-term contact of moisture with the metal enclosure and internal components will cause serious corrosion. Ventilation and heat dissipation are contradictory to waterproofing and rust prevention. The unit is in a high-temperature and high-humidity environment for a long time, which accelerates metal oxidation and equipment aging. Corrosion problems significantly shorten the service life of the ring main unit, increase operation and maintenance and replacement costs, and directly affect the power supply safety of the distribution network. Summary of the Invention

[0005] This application provides a rust-resistant ring main unit that simultaneously provides ventilation and heat dissipation as well as waterproofing and rust prevention.

[0006] This application provides a rust-resistant ring main unit, which adopts the following technical solution: A rust-resistant ring main unit includes an outer casing and a built-in ring main switch unit. The outer casing has several heat dissipation holes on its side walls, and a partition parallel to the inner wall is arranged longitudinally inside the outer casing. The partition has several ventilation holes corresponding to the heat dissipation holes. The heat dissipation holes and ventilation holes are arranged in a staggered manner. The side of the partition is flexibly and tightly connected to the inner wall of the casing by a waterproof curtain. The waterproof curtain is inclined and sealed to the heat dissipation holes and ventilation holes. The heat dissipation holes, waterproof curtain, and ventilation holes together form an arc-shaped ventilation and heat dissipation channel.

[0007] Preferably, the heat dissipation holes are strip-shaped holes, arranged at equal intervals along the longitudinal direction of the outer casing to form ventilation windows.

[0008] Preferably, the ventilation window is provided with louvers, and the louvers have an inwardly inclined downward structure.

[0009] Preferably, the inner side of the outer casing and the side of the partition are provided with quick-release components for assembling and disassembling the waterproof curtain.

[0010] Preferably, the quick-release assembly includes a insert strip, the insert strip having an irregularly shaped insertion hole inside, the insertion hole having an insertion rod inside, and the insertion rod having a groove on its radial surface for the waterproof curtain to pass through.

[0011] Preferably, the bottom of the partition is provided with a base, and an electric telescopic rod is installed below the base. The output end of the electric telescopic rod is connected to the base and is used to adjust the height of the partition to change the relative position of the vent and the heat dissipation hole.

[0012] Preferably, the partition plate on the base is a transversely retractable structure.

[0013] Preferably, a lateral limiting component and a piston assembly for driving the partition are provided between the partition and the base. The lateral limiting component includes a T-groove fixed on the base and a T-block slidably disposed in the T-groove. The top of the T-block is fixedly connected to the top of the partition, and the T-block is connected to the inner wall of the T-groove by a spring.

[0014] Preferably, the outer casing has a bottom plate inside, which divides the internal space of the outer casing into upper and lower layers. The lower layer has several rubber moisture-proof pads and drainage supports, and the drainage supports have annular water guide grooves inside.

[0015] Preferably, a condenser module and a fan module are mounted on the upper surface of the base plate.

[0016] In summary, this application has the following beneficial effects: 1. To address the core challenge of simultaneously achieving ventilation and heat dissipation while providing waterproofing and rust prevention in outdoor ring network enclosures, this invention further optimizes the design by incorporating staggered heat dissipation holes and vents in conjunction with a waterproof curtain. This creates an arc-shaped, bent ventilation channel that blocks rainwater and sand from entering while ensuring effective ventilation. This channel allows air to circulate in an arc, with rainwater sliding down the curtain to the lower layer for discharge, while sand and wind are intercepted by the bent structure, cutting off the root cause of corrosion and perfectly balancing heat dissipation and protection requirements.

[0017] 2. To further optimize the ventilation uniformity and active rain protection of the enclosure, this invention also incorporates strip-shaped heat dissipation holes forming ventilation windows and downward-facing louvers on the inner side. This achieves uniform ventilation and facilitates the drainage of rainwater. The evenly spaced strip-shaped holes prevent localized heat accumulation, while the angled louvers block rainwater from splashing in. This dual design enhances the enclosure's external rain protection and improves ventilation and heat dissipation efficiency.

[0018] 4. To address the issues of cumbersome installation and disassembly, and high maintenance costs associated with waterproof curtains, this invention further optimizes the process by incorporating a quick-release assembly with inserts and mounting rods. This allows for rapid replacement and secure fixation of the waterproof curtain. The irregularly shaped inserts and sliding grooves adapt to curtain installation, enabling quick installation and disassembly without specialized tools, reducing maintenance complexity and ensuring the continued effectiveness of the protective structure.

[0019] 5. To further optimize the system and address the inability to dynamically adjust ventilation and protection under different working conditions, this invention also incorporates an electrically operated telescopic rod to drive the partition's lifting and lowering, enabling adjustable misalignment between the ventilation holes and heat dissipation holes. In hot weather, this increases ventilation and enhances heat dissipation; in severe weather, it increases the misalignment to block rainwater and sand, dynamically balancing heat dissipation and rust prevention needs.

[0020] 6. To further optimize the waterproof curtain's function by addressing rust and seal failure caused by debris accumulation, this invention also incorporates a lateral limit and piston assembly to drive the expansion and contraction of the partition. This achieves self-cleaning and sealing of the curtain. Intermittent expansion and contraction shake off windblown dust and sand, while simultaneously fine-tuning the curtain's fit to prevent gaps and further reduce the risk of rust.

[0021] 7. To further optimize the function by addressing the intrusion of ground moisture and the condensation and corrosion inside the chamber, this invention also incorporates a layered structure, a moisture-proof barrier, a drainage support, and a condenser fan module. These features achieve the effects of blocking moisture, rapid drainage, and active dehumidification. Layered isolation of ground moisture, a condenser module to remove water vapor, and a water channel to quickly drain accumulated water comprehensively inhibit rust formation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the ring network box in Example 1; Figure 2 This is a partial cross-sectional view of the outer casing in Example 1; Figure 3 This is a schematic diagram of the overall structure connecting the outer casing and the partition in Example 2; Figure 4 This is a schematic diagram of the internal structure of the quick-release component in Embodiment 2; Figure 5 This is a schematic diagram of the internal structure of the lateral limiting component in Embodiment 3; Explanation of reference numerals in the attached drawings: 1. Outer casing; 2. Ring network switch unit; 3. Base plate; 4. Heat dissipation hole; 5. Condensation module; 6. Fan module; 7. Partition plate; 8. Ventilation hole; 9. Waterproof curtain; 10. Quick-release assembly; 1001. Insert strip; 1002. Insertion hole; 1003. Insertion rod; 1004. Slide groove; 11. Base; 12. Electric telescopic rod; 13. Lateral limiting assembly; 1301. T-slot; 1302. T-block; 1303. Spring; 14. Piston assembly. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content. Example 1

[0024] This invention discloses a rust-resistant ring main unit, such as... Figure 1 As shown, the device includes an outer casing 1 and a built-in ring main unit 2. The outer casing 1 has a base plate 3 inside, which divides the internal space of the outer casing 1 into upper and lower layers, forming a physical isolation barrier. The upper layer specifically supports the ring main unit 2, keeping it away from direct contact with the ground and preventing ground moisture from penetrating the core electrical components through conduction, thus reducing the risk of corrosion from a spatial layout perspective. The lower layer has several rubber moisture-proof pads and drainage supports. The drainage supports have annular water-guiding channels inside, used to block ground moisture and quickly drain accumulated water. Specifically, the rubber moisture-proof pads in the lower layer utilize the sealing and water-resistant properties of rubber to further prevent ground moisture from penetrating upwards, filling the gap between the base plate 3 and the ground, forming a secondary moisture-proof barrier. Simultaneously, the annular water-guiding channel design of the drainage supports can quickly collect accumulated water in the lower space. Whether it's water seeping back from the ground, water droplets condensing from moisture in the air, or a small amount of water accidentally seeping in from the outside, it can all be quickly discharged outside the tank through the ring-shaped water guide channel, preventing water from stagnating in the lower layer and generating moisture, thus completely solving the corrosion problem caused by water accumulation from the perspective of active drainage.

[0025] It is worth noting that the rubber moisture-proof pad not only blocks moisture but also plays a role in buffering and shock absorption. When the ring main unit is installed outdoors or encounters slight vibration, the pad can absorb the impact of vibration, preventing friction damage between the base plate 3 and the ground, and between the switch unit and the base plate 3 caused by vibration. At the same time, it reduces the impact of vibration on electrical components, extends the service life of the switch unit, and, together with the anti-rust function, further improves the overall durability of the equipment.

[0026] In addition, the design of the annular water channel can not only drain accumulated water, but also form a ventilation channel in the lower layer. During the drainage process, the water channel can promote the air circulation in the lower layer, accelerate the dissipation of moisture, and at the same time reduce the temperature and humidity difference in the lower space, avoiding condensation. It not only assists in moisture and rust prevention, but also reduces the probability of electrical components short circuits and failures due to moisture, achieving synergistic benefits of "drainage + ventilation + fault prevention".

[0027] like Figure 1 and Figure 2As shown, the outer casing 1 has several heat dissipation holes 4 on its side. The heat dissipation holes 4 are strip-shaped and are evenly distributed along the longitudinal direction of the outer casing 1. The several strip-shaped holes form ventilation windows on the outer casing 1. The evenly spaced design can ensure uniform ventilation on the side of the outer casing 1, avoid local heat accumulation, and quickly dissipate the heat generated by the operation of electrical components inside the casing through air convection, thereby reducing the temperature and humidity inside the casing and reducing the risk of corrosion in high temperature and high humidity environments from the source.

[0028] The louvers inside the ventilation window feature an inwardly sloping downward structure, combined with a small spacing between the louvers, forming a natural rain barrier. When rain falls, the downward-sloping louvers prevent rainwater from directly entering. Even if a small amount of rainwater splashes onto the louver surface, it will slide off the outside of the enclosure due to the angle. The small spacing also prevents rainwater from seeping through the gaps, achieving a dual effect of "ventilation without water ingress." The downward-sloping structure of the louvers not only prevents rain but also aids in drainage. If a small amount of rainwater accidentally seeps into the gaps between the louvers, the angle guides the water to the lower part of the enclosure, where it is quickly discharged in conjunction with the existing drainage support's annular water guide channel. This works synergistically with the existing drainage structure to prevent rainwater from accumulating and causing internal corrosion, further enhancing the rust prevention effect.

[0029] The paint applied to the exterior of the outer casing 1 forms a dense protective film that directly isolates rainwater and moisture in the air from contact with the metal surface of the casing, preventing metal oxidation and corrosion. It also protects the outer wall of the casing. Together with the rainproof function of the louvers and the ventilation and moisture-proof function of the heat dissipation holes 4, it constructs a complete protection system that is "anti-corrosion on the outside, prevents water ingress on the inside, and also ensures heat dissipation".

[0030] like Figure 1 As shown, a condenser module 5 and a fan module 6 are further fixedly installed on the upper surface of the base plate 3. The condenser module 5 can accurately capture water vapor in the air inside the box and condense the water vapor into liquid water droplets through the cooling effect, so as to prevent water vapor from condensing on the surface of electrical components and forming water stains, thereby reducing corrosion and electrical failures caused by moisture from the source.

[0031] The fan module 6 is responsible for accelerating air convection within the enclosure. On one hand, it rapidly diffuses the cool air around the condenser module 5 to the entire upper space, improving the uniformity and efficiency of condensation dehumidification. On the other hand, it promptly dissipates the heat generated by the operation of electrical components, preventing high-temperature environments from accelerating metal corrosion and component aging. Simultaneously, the water droplets generated by condensation flow down the surface of the bottom plate 3 to the lower space, where they are quickly discharged by the annular water guide groove of the existing drainage support, forming a closed loop with the lower moisture-proof and drainage structure, comprehensively improving the rust resistance, durability, and operational stability of the ring main unit. Example 2

[0032] The existing ventilation window uses an inclined louver structure, which can prevent rainwater from seeping into the box shell under normal operating conditions. However, due to the fixed size of the conventional louver blades, rainwater can still easily penetrate the gaps between the louvers and enter the inner cavity of the box under severe weather conditions with wind and rain accompanied by crosswinds. At the same time, wind and sand can easily carry rainwater and accumulate inside the box, which will cause corrosion, aging and damage to the inner wall and internal structure of the box over a long period of time.

[0033] like Figure 3 and Figure 4 As shown, this design specifically addresses the pain points of conventional tilting louvers, such as rainwater seepage and sand accumulation in adverse weather conditions with lateral winds. It also works in deep synergy with the existing protection system to enhance the overall rust prevention effect. The structure has a partition 7 inside the outer casing 1. The partition 7 is longitudinal and parallel to the inner wall of the outer casing 1. Several ventilation holes 8 are evenly opened on the partition 7. Each ventilation hole 8 is matched with the heat dissipation hole 4 on the side wall of the casing. The heat dissipation hole 4 and the ventilation hole 8 are arranged in a staggered manner. The side of the partition 7 and the inner wall of the casing are connected in a sealed and flexible manner by a waterproof curtain 9. One edge of the waterproof curtain 9 is tangentially attached to the bottom edge of the heat dissipation hole 4, and the other edge is tangentially attached to the bottom edge of the corresponding ventilation hole 8 directly below the heat dissipation hole 4. The waterproof curtain 9 is arranged in an inclined posture towards the ventilation hole 8. The heat dissipation hole 4, two adjacent sets of waterproof curtains 9 and ventilation holes 8 cooperate with each other to form an arc-shaped ventilation and heat dissipation channel. The waterproof curtain 9 realizes the sealed and flexible connection between the partition 7 and the inner wall of the casing, and is inclined towards the ventilation hole 8, forming an arc-shaped ventilation channel with the heat dissipation hole 4 and ventilation hole 8.

[0034] External air enters through the heat dissipation holes 4, bypasses the waterproof curtain 9 along the arc-shaped channel, and enters the upper space inside the box through the vent holes 8, achieving ventilation and heat dissipation while effectively blocking rainwater. Rainwater carried by lateral crosswinds impacts the heat dissipation holes 4, but is blocked by the staggered layout and arc-shaped channel, preventing it from entering in a straight line. Furthermore, the tilted waterproof curtain 9 guides the rainwater to slide down its surface to the lower space, where it is discharged by the existing drainage support channel. At the same time, wind and sand are intercepted by the curved channel, preventing them from entering the box and accumulating inside. This reduces the erosion of the inner wall and internal structure of the box by rainwater and wind and sand from the source, and works synergistically with the condenser, fan module 6, and outer box paint protection to improve the overall protection system.

[0035] Specifically, the curved ventilation channel optimizes the airflow path inside the enclosure, working in synergy with the fan module 6 and condenser module 5 on the base plate 3 to guide external cold air precisely to the electrical components and condenser module 5. This improves the uniformity of forced cooling by the fan and accelerates the condensation of moisture around the condenser module 5, further enhancing dehumidification and heat dissipation efficiency while reducing the fan's operating load and lowering energy consumption. Furthermore, the flexible, airtight design of the waterproof curtain 9 fills the gaps between the partition 7 and the inner wall of the enclosure, preventing cold air leakage and external moisture penetration. This not only helps the condenser module 5 maintain a low-humidity environment inside the enclosure but also protects the paint coating on the inner wall of the outer enclosure 1, preventing coating peeling and internal corrosion due to moisture accumulation in the gaps. This synergistic effect with the paint protection and condenser module 5 enhances the corrosion resistance.

[0036] like Figure 3 and Figure 4 As shown, specifically, quick-release components 10 for assembling and disassembling the waterproof curtain 9 are provided on the inner side of the outer casing 1 and the side of the partition 7. The quick-release components 10 include inserts 1001, which are fixed to the inner side of the casing and the side of the partition 7 respectively, providing a fixed base 11 for the installation of the waterproof curtain 9. The inserts 1001 have elliptical holes 1002 inside. Compared with circular holes 1002, the elliptical holes 1002 can not only allow the insertion rod 1003 to be quickly inserted and positioned, but also prevent the insertion rod 1003 from loosening or shifting after installation through the limiting effect of the elliptical structure, thus ensuring the stability of the fixation. The insertion hole 1002 is internally equipped with a mounting rod 1003. The radial surface of the mounting rod 1003 is provided with a groove 1004 for the waterproof curtain 9 to pass through, allowing the edge of the waterproof curtain 9 to quickly pass through and be secured, achieving rapid fixation of the curtain. At the same time, the width of the groove 1004 is adapted to the thickness of the curtain, ensuring that the curtain is flat and wrinkle-free after installation, without affecting its fit with the heat dissipation hole 4 and the ventilation hole 8. The quick-release design greatly improves maintenance efficiency. Aging or damaged waterproof curtain 9 can be quickly disassembled and replaced without the need for professional tools. Combined with the ease of cleaning of the ventilation hole 8 and the heat dissipation hole 4, and the ease of maintenance of the drainage support, it significantly shortens maintenance time, reduces maintenance difficulty, and minimizes losses caused by maintenance downtime.

[0037] like Figure 3 and Figure 4 As shown, a base 11 is provided at the bottom of the partition 7, and an electric telescopic rod 12 is provided at the bottom of the base 11. The output end of the electric telescopic rod 12 is connected to the center position of the base 11 and is used to adjust the height of the partition 7, thereby adjusting the relative position between the vent hole 8 and the heat dissipation hole 4.

[0038] The height of partition 7 is adjustable via electric control, thereby changing the relative misalignment between the ventilation holes 8 and the heat dissipation holes 4. When lowering, the misalignment distance between the ventilation holes 8 and the heat dissipation holes 4 is reduced, increasing the ventilation cross-sectional area; conversely, the misalignment distance is increased, enhancing the waterproof and sand-proof barrier effect. Precise control of the electric telescopic rod 12 ensures that the ventilation holes 8 and the heat dissipation holes 4 always correspond one-to-one, unaffecting the tilt and sealing of the waterproof curtain 9, achieving "adjustment without failure." In hot weather, this allows for raising the height of partition 7 to reduce misalignment and expand the ventilation area, working in conjunction with the fan module 6 to improve heat dissipation efficiency, achieving a dual benefit of "condition adaptation + protection upgrade." Example 3

[0039] like Figure 3 and Figure 5 As shown, the partition 7 on the base 11 is a transversely retractable structure. Specifically, a transverse limiting component 13 and a piston assembly 14 for driving the partition 7 are provided between the partition 7 and the base 11. The transverse limiting component 13 includes a T-shaped groove 1301 fixed on the base 11 and a T-shaped block 1302 slidably disposed in the T-shaped groove 1301. The top of the T-shaped block 1302 is fixedly connected to the top of the partition 7. The T-shaped block 1302 is connected to the inner wall of the T-shaped groove 1301 by a spring 1303. Through the coordinated operation of the piston assembly 14 and the transverse limiting component 13, the waterproof curtain 9 is automatically cleaned without damaging the integrity of the original protective system, and is compatible with the structure described above. In the lateral limiting component 13, the T-slot 1301 on the base 11 provides a stable sliding track for the T-block 1302. The T-block 1302 is fixedly connected to the partition 7, which not only limits the direction of the lateral displacement of the partition 7 to avoid deviation, but also prevents the partition 7 from falling off through the limiting effect of the T-shaped structure. The spring 1303 connected to the inner wall of the T-slot 1302 and the T-block 1301 can provide the reset force after the partition 7 is displaced, ensuring the cyclical nature of intermittent expansion and contraction.

[0040] The piston assembly 14, acting as the driving core, can cause the partition 7 to intermittently shift laterally within the T-slot 1301. This, in turn, causes the waterproof curtain 9, fixed to the partition 7, to sway and vibrate slightly laterally. The vibration inertia helps to shake off rainwater, sand, dust, and other debris adhering to the surface of the curtain, achieving a self-cleaning function. During the operation of the entire structure, the cooperation between the partition 7 and the electric telescopic rod 12 is not affected, nor is the relative position of the vent 8 and the heat dissipation hole 4, or the structure of the arc-shaped ventilation channel altered. Working in conjunction with the electric telescopic rod 12, the waterproof curtain 9, and the quick-release assembly 10, it ensures both the self-cleaning effect and maintains the original ventilation, waterproof, and sandproof performance, further reducing the risk of corrosion caused by debris accumulation.

[0041] Intermittent lateral displacement can finely adjust the fit of the waterproof curtain 9, which works in conjunction with the height adjustment of the electric telescopic rod 12. During the displacement, the curtain can make slight friction and fit with the heat dissipation hole 4 and the ventilation hole 8, avoiding gaps caused by long-term fixation, further improving the sealing of the arc-shaped ventilation channel, preventing rainwater and sand from seeping in, and forming a double protection with the waterproof function of the waterproof curtain 9.

[0042] Working principle: First, after this anti-corrosion ring main unit is put into operation, the bottom plate 3 of the outer casing 1 first divides the internal space into upper and lower layers, forming a physical isolation barrier. The upper layer carries the ring main switch unit 2, keeping it away from the ground to avoid direct moisture conduction. The rubber moisture-proof pad of the lower layer is tightly attached to the installation surface, using the water-proof properties of rubber to block the upward penetration of ground moisture, filling the gap between the bottom plate 3 and the ground, and building the first line of moisture protection. The annular water guide groove of the drainage support is ready at the same time to collect any water and condensation that may seep in later, preventing water from accumulating in the lower layer. From the spatial layout, the contact path between ground moisture and core electrical components is cut off, laying the foundation for anti-corrosion.

[0043] Then, the ring network switch unit 2 generates heat during operation, and the temperature inside the box gradually rises. The external heat dissipation structure begins to work in concert. The strip-shaped heat dissipation holes 4 on the side wall of the outer box 1 are arranged at equal intervals to form ventilation windows, ensuring uniform ventilation on the side of the box and avoiding local heat accumulation. The louvers on the inner side of the ventilation window tilt downwards to form the first external rainproof barrier. When rain falls, it is blocked by the blades and slides out of the box. Even if a small amount of rain splashes onto the surface of the blades, it cannot directly enter the box through the gaps, thus initially achieving a basic balance between ventilation and rainproofing.

[0044] Subsequently, external air enters the enclosure through the heat dissipation hole 4 and then enters the arc-shaped, curved ventilation channel enclosed by the heat dissipation hole 4, the vent hole 8, and the waterproof curtain 9. The heat dissipation hole 4 and the vent hole 8 are arranged vertically in a staggered manner. The waterproof curtain 9 is inclined to seal the connection between the partition 7 and the inner wall of the enclosure. The air must bypass the waterproof curtain 9 along the arc-shaped channel and then enter the inner layer of the enclosure through the vent hole 8 on the partition 7. During this process, rainwater and sand carried by the lateral crosswinds are effectively intercepted by the staggered structure and the arc-shaped channel. The rainwater slides down the surface of the waterproof curtain 9 to the lower layer of the enclosure, while the sand is blocked outside the ventilation channel and cannot contact the internal metal parts and electrical components, thus completely solving the core problem of direct intrusion of rainwater and sand in traditional straight ventilation channels.

[0045] Then, when the humidity inside the chamber exceeds the standard, the condensation module 5 on the upper surface of the base plate 3 and the fan module 6 start simultaneously. The condensation module 5 accurately captures the water vapor inside the chamber through cooling and condenses it into liquid water droplets, preventing water vapor from condensing on the surface of electrical components to form condensation. The fan module 6 accelerates the air convection inside the chamber, evenly dispersing the cold air generated by the condensation module 5 to the entire upper space, improving the uniformity and efficiency of dehumidification. At the same time, it quickly removes the heat generated by the operation of electrical components, reducing the temperature and humidity inside the chamber and inhibiting the conditions for metal oxidation and corrosion from an environmental perspective. The water droplets generated by condensation flow down the base plate 3 to the lower space and are quickly discharged outside the chamber by the annular water guide channel, forming a closed-loop system of dehumidification, drainage, and heat dissipation.

[0046] Subsequently, in response to different working conditions such as high temperature, rain, and sandstorms, the electric telescopic rod 12 drives the base 11 and the partition 7 to adjust their height. In hot weather, the partition 7 is raised to reduce the misalignment distance between the vent 8 and the heat dissipation hole 4, thereby expanding the ventilation cross-sectional area. This, combined with the fan module 6, significantly improves heat dissipation efficiency and quickly reduces the temperature inside the box. In severe weather such as rain and sandstorms, the partition 7 is lowered to increase the misalignment distance, thereby strengthening the barrier effect of the arc-shaped ventilation channel and further preventing rainwater and sand from entering. This achieves dynamic adaptation between ventilation and heat dissipation and rust prevention.

[0047] Then, the piston assembly 14 and the lateral limiting assembly 13 work together to drive the partition 7 to perform intermittent lateral extension and retraction on the base 11. The T-block slides stably in the T-slot, and the spring 1303 provides the partition 7 with the reset power, causing the waterproof curtain 9 to vibrate slightly in sync. The vibration inertia shakes off the dust, sand and residual water droplets attached to the surface of the curtain, realizing the self-cleaning function of the waterproof curtain 9 and avoiding the long-term accumulation of debris that leads to curtain aging and seal failure. At the same time, the intermittent extension and retraction can finely adjust the fit between the waterproof curtain 9 and the heat dissipation hole 4 and the ventilation hole 8, fill the gaps caused by long-term use, and continuously maintain the sealing of the arc-shaped ventilation channel.

[0048] Subsequently, the quick-release component 10 provides a guarantee for the long-term operation and maintenance of the protective structure. The insert strip 1001, irregular hole 1002 and installation rod 1003 on the inner side of the outer casing 1 and the side of the partition 7 combine to allow the waterproof curtain 9 to quickly pass through the slide groove 1004 to be fixed. It can be quickly disassembled and replaced without professional tools. When the waterproof curtain 9 ages or is damaged, the maintenance personnel can quickly replace it to ensure that the sealing and protection functions of the ventilation channel are not interrupted.

[0049] Finally, the entire ring main unit forms a multi-layered, collaborative anti-corrosion protection system: the external paint coating isolates moisture from contact with the metal surface, the louvers and arc-shaped channels block rainwater and sand intrusion, the layered structure and moisture-proof pads block ground moisture, the condenser fan module 6 actively regulates the temperature and humidity inside the unit, the water guide channel quickly drains accumulated water, the electric adjustment and self-cleaning structure maintain long-term protection, and the quick-release components 10 ensure convenient operation and maintenance. From multiple dimensions such as isolation, drainage, active regulation, and long-term maintenance, the problem of easy corrosion of outdoor ring main units is thoroughly solved, the service life of the equipment is greatly extended, and the power supply safety of the distribution network is stably guaranteed.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rust-proof ring main unit, characterized by: The enclosure includes an outer casing (1) and a built-in ring network switch unit (2). The outer casing (1) has several heat dissipation holes (4) on its side wall. The outer casing (1) has a partition (7) arranged longitudinally inside the outer casing (1) that is parallel to the inner wall. The partition (7) has several ventilation holes (8) that correspond one-to-one with the heat dissipation holes (4). The heat dissipation holes (4) and ventilation holes (8) are arranged in a staggered manner. The side of the partition (7) is flexibly and tightly connected to the inner wall of the enclosure through a waterproof curtain (9). The waterproof curtain (9) is inclined and sealed to the heat dissipation holes (4) and ventilation holes (8). The heat dissipation holes (4), waterproof curtain (9) and ventilation holes (8) together form an arc-shaped ventilation and heat dissipation channel.

2. The anti-corrosion ring main unit according to claim 1, characterized in that: The heat dissipation holes (4) are strip-shaped holes, arranged at equal intervals along the longitudinal direction of the outer casing (1) to form ventilation windows.

3. The anti-corrosion ring main unit according to claim 2, characterized in that: The ventilation window is equipped with louvers, which are inclined downwards on the inside.

4. The anti-corrosion ring main unit according to claim 1, characterized in that: The inner side of the outer casing (1) and the side of the partition (7) are provided with quick-release components (10) for assembling and disassembling the waterproof curtain (9).

5. The rust-proof ring main unit according to claim 4, characterized in that: The quick-release assembly (10) includes a insert (1001), the insert (1001) has an irregularly shaped insertion hole (1002) inside, the insertion hole (1002) has an insertion rod (1003) inside, and the radial surface of the insertion rod (1003) has a groove (1004) for the waterproof curtain (9) to pass through.

6. The rust-proof ring main unit according to claim 1, characterized in that: The bottom of the partition (7) is provided with a base (11), and an electric telescopic rod (12) is installed below the base (11). The output end of the electric telescopic rod (12) is connected to the base (11) and is used to adjust the height of the partition (7) to change the relative position of the vent (8) and the heat dissipation hole (4).

7. The rust-proof ring main unit according to claim 6, characterized in that: The partition (7) is a transversely retractable structure on the base (11).

8. The rust-proof ring main unit according to claim 7, characterized in that: A lateral limiting assembly (13) and a piston assembly (14) for driving the partition (7) are provided between the partition (7) and the base (11). The lateral limiting assembly (13) includes a T-slot (1301) fixed on the base (11) and a T-block (1302) slidably disposed in the T-slot (1301). The top of the T-block (1302) is fixedly connected to the top of the partition (7). The T-block (1302) is connected to the inner wall of the T-slot (1301) by a spring (1303).

9. The rust-proof ring main unit according to claim 1, characterized in that: The outer casing (1) is provided with a bottom plate (3), which divides the internal space of the outer casing (1) into upper and lower layers. The lower layer is provided with several rubber moisture-proof pads and drainage supports. The drainage supports are provided with annular water guide grooves.

10. The rust-proof ring main unit according to claim 9, characterized in that: The base plate (3) is equipped with a condenser module (5) and a fan module (6) on its upper surface.

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