An open-close multi-working condition power distribution box shell for smart grid

Abstract

This invention provides a hinged, multi-condition distribution box enclosure for smart grids, relating to the field of distribution box technology. It includes a distribution box cabinet with a fixed corrugated back panel on the back for enhanced wind pressure resistance. This provides stable anti-deformation support for the back of the cabinet during typhoon conditions, adapting to the extreme weather protection needs of islands. Both sides of the cabinet are equipped with side panel flipping mechanisms. This invention features flip-up side panels that can rotate 180° around a sliding pivot. Combined with the fixed corrugated back panel on the back of the cabinet, under extreme typhoon conditions, the corrugated flip panel can face outwards, forming a three-sided corrugated wind pressure-resistant structure to withstand typhoon impacts. Under normal conditions, the electromagnetic shielding layer can face outwards, avoiding the accumulation of salt crystals and hindering heat dissipation in the corrugated structure. This completely solves the industry pain point that fixed enclosures in island scenarios cannot simultaneously achieve wind pressure resistance, heat dissipation, and salt spray corrosion resistance.

Description

Technical Field

[0001] This invention belongs to the field of distribution box technology, and more specifically, relates to a retractable multi-condition distribution box shell for smart grids. Background Technology

[0002] In the process of building smart grids, outdoor power distribution scenarios in island and coastal typhoon-prone areas are key application scenarios for the end-point distribution networks of smart grids. These are also the most complex and demanding composite extreme scenarios, requiring the most stringent performance from distribution boxes. In these scenarios, distribution boxes not only face the constant impact of alternating positive and negative wind pressure from typhoons, continuous corrosion from high salt spray, and extreme weather conditions of high temperature and humidity in summer, but also endure strong electromagnetic interference and frequent fluctuations in grid harmonics due to the high dependence of island microgrids on distributed photovoltaic and offshore wind power grid connection. Furthermore, the inconvenient transportation and poor accessibility for maintenance in island settings place extremely high demands on the unattended and long-term maintenance-free operation capabilities of distribution boxes. The comprehensive performance of their outer shell structure directly determines the power supply stability and operational lifespan of the island power distribution network.

[0003] Existing technologies typically employ a fixed corrugated shell design, using corrugated surfaces to enhance the bending and torsional rigidity of the sheet metal, thereby resisting the impact of typhoon wind pressure. However, this design has inherent drawbacks that cannot be avoided in island environments: the fixed corrugated structure significantly reduces the effective heat dissipation area of ​​the shell, and the corrugated grooves are prone to accumulating salt crystals and dust, which not only directly reduces the natural heat dissipation efficiency of the cabinet, but also cannot adapt to the peak and valley fluctuations in electricity load brought about by grid connection of photovoltaic and wind power on islands. During peak electricity consumption periods in summer, the internal components are prone to overheating and tripping due to excessive temperature rise.

[0004] Existing technologies typically involve installing a fixed metal shielding layer on the inner wall of the cabinet or employing a fully enclosed shielded cabinet structure; however, this approach still cannot resolve performance conflicts in island environments. While fully enclosed shielded cabinets can achieve good electromagnetic shielding and resist harmonic interference from photovoltaic and wind power grid connections, they completely sacrifice natural heat dissipation capacity. Under peak loads, additional electric cooling fans must be installed; however, in the high salt spray and high humidity environment of islands, the failure rate of cooling fans is extremely high, significantly increasing maintenance costs. Furthermore, the fan's ventilation ducts can compromise the cabinet's sealing performance, allowing rainwater and salt spray to penetrate the cabinet, causing short circuits and corrosion of internal electrical components. While installing fixed ventilation openings in the cabinet can improve natural heat dissipation, these openings create electromagnetic leakage channels, significantly reducing the cabinet's electromagnetic shielding effectiveness and making it unable to withstand strong electromagnetic interference and harmonic fluctuations in the environment.

[0005] In addition, the existing outdoor distribution boxes all have a fixed structure design. Their wind pressure resistance, protection, heat dissipation, and electromagnetic shielding performance are fixed at the factory and cannot adapt to the dynamic operating conditions of island scenarios: During the normal sunny days when the photovoltaic system is generating at full capacity, the cabinet needs to take into account both efficient heat dissipation and electromagnetic shielding; after a typhoon warning is issued, the cabinet needs to quickly improve its wind pressure resistance and fully sealed anti-salt spray performance; during the typhoon and peak electricity consumption periods, the cabinet needs to meet both wind pressure protection and basic heat dissipation requirements; during the low load period at night, the cabinet needs to be fully enclosed to reduce salt spray intrusion. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a retractable multi-condition distribution box enclosure for smart grids. This addresses the issues that while existing fixed corrugated enclosures can enhance sheet metal rigidity through corrugated surfaces to withstand typhoon wind pressure, they suffer from reduced effective heat dissipation area, easy accumulation of salt crystal dust in corrugated grooves leading to decreased heat dissipation efficiency, inability to adapt to peak-valley load fluctuations caused by grid connection of photovoltaic and wind power on islands, and the tendency for components inside the cabinet to overheat and trip during summer peak periods.

[0007] A smart grid-compatible, multi-condition distribution box enclosure includes a cabinet. The back of the cabinet is fixed with a wave-resistant back plate to enhance wind pressure resistance, providing stable anti-deformation support for the cabinet back under typhoon conditions and adapting to the extreme weather protection needs of islands. Both sides of the cabinet are equipped with side panel flipping mechanisms, each including a flip-up side panel that can be switched between front and back to adapt to different functional requirements. A sliding pivot is fixed through the side end of each flip-up side panel, providing a motion reference for horizontal sliding and rotational flipping. Mounting screw holes are provided at both the top and bottom of each flip-up side panel, and locking screws are inserted between these holes and the cabinet to lock the flip-up side panels. The reversible side panel can be rigidly locked to the cabinet after it is flipped, preventing loosening and displacement in outdoor conditions. Multiple heat dissipation adjustment mechanisms are arranged inside the frame of the reversible side panel. Each heat dissipation adjustment mechanism includes an electromagnetic shielding layer and a wave-shaped flip panel. The four edges of the electromagnetic shielding layer are fixed with beryllium copper springs for attaching to adjacent shielding layers. In the closed state, it can form a continuous and uninterrupted electromagnetic shielding cavity, which can effectively resist strong electromagnetic interference and harmonic fluctuations brought by the grid connection of distributed energy on the island. The outer surface of the wave-shaped flip panel is a vertical continuous trapezoidal corrugated structure with the same waveform parameters as the fixed wave back panel. When flipped outward, it can form an omnidirectional wind pressure resistance system with the fixed wave back panel, which can greatly improve the cabinet's ability to resist typhoon impacts.

[0008] Preferably, the distribution box cabinet has side holes on both the left and right sides that penetrate the inside and outside of the cabinet, providing installation and operation space for the flip-up side panel. The upper and lower ends of the inner wall of the side holes have horizontally extending sliding grooves, providing precise guidance and travel limit for the movement of the sliding shaft. The upper and lower ends of the sliding shaft are slidably installed in the sliding grooves, and wear-resistant sliding bearings are fitted on the upper and lower ends of the sliding shaft. The outer ring of the wear-resistant sliding bearing fits against the inner wall of the sliding groove, which can greatly reduce the frictional resistance during the sliding and rotation of the sliding shaft, avoid jamming, and compensate for slight installation deviations, ensuring a smooth and stable flip-up process for the flip-up side panel.

[0009] Preferably, the interior of the distribution box cabinet is fixed with a U-shaped mesh mounting plate for installing electrical components. This provides a stable installation reference for core components such as circuit breakers and intelligent monitoring terminals inside the cabinet, while facilitating front-side disassembly and maintenance by operation and maintenance personnel. The opening of the U-shaped mesh mounting plate faces the front of the distribution box cabinet, and the left and right side plates of the U-shaped mesh mounting plate are metal filter structures. This can prevent dust and insects from entering the component installation area while not affecting air circulation inside the cabinet. It can also quickly conduct the heat generated by the operation of the components to the heat dissipation channels on both sides of the cabinet, greatly improving the efficiency of natural heat dissipation.

[0010] Preferably, a first rotating shaft is fixedly installed on the electromagnetic shielding layer, which can drive the electromagnetic shielding layer to rotate synchronously to achieve opening and closing action. A second rotating shaft is fixedly installed on the wave-shaped flip panel, which can drive the wave-shaped flip panel and the electromagnetic shielding layer to flip synchronously. A limiting rod for limiting the axial distance is installed between the same side ends of the first rotating shaft and the second rotating shaft, which can ensure the coaxiality and structural stability of the two rotating shafts during rotation and avoid the problems of shaft misalignment and jamming. The ends of the first rotating shaft and the second rotating shaft are connected to a micro drive motor for driving the rotating shaft to rotate, which can precisely control the rotation angle of the rotating shaft, thereby adjusting the opening of the heat dissipation channel to adapt to the heat dissipation and protection requirements of different working conditions.

[0011] Preferably, the upper and lower ends of the distribution box cabinet are provided with symmetrical through holes at the positions corresponding to the side holes. This can accommodate the locking and positioning requirements after the flip-up side panel is flipped in both directions. Fixing in different orientations can be completed without additional structural adjustments. The locking screw passes through the through holes and is threadedly connected to the mounting screw holes, which can achieve rigid fixing of the flip-up side panel to the distribution box cabinet. This ensures the stability of the structure under extreme conditions such as typhoons and prevents the side panel from loosening or shifting, thus compromising the protective performance.

[0012] Preferably, the frame of the flip-up side panel is fitted with elastic sealing strips around its perimeter to seal gaps. After the flip-up side panel is locked, these strips fill the gap between the side panel and the side holes of the cabinet, preventing rainwater, salt spray, and dust from entering the cabinet and ensuring the cabinet's IP65 protection rating. The micro drive motor is fixedly installed on the inner wall of the frame of the flip-up side panel, avoiding direct corrosion from the outdoor environment and improving the motor's operational reliability and service life. The micro drive motor is electrically connected to the control panel on the distribution box cabinet, facilitating manual control by operators on-site. It can also work with sensors inside the cabinet to automatically open and close the heat dissipation channels, adapting to the unattended operation requirements of islands.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In this invention, a rotatable side panel that can be rotated 180° around a sliding pivot is provided. Combined with a fixed wave-shaped back panel on the back of the cabinet, the wave-shaped panel can be rotated to face outwards under extreme typhoon conditions, forming a three-sided corrugated wind-pressure resistant structure to resist typhoon impact. Under normal conditions, the electromagnetic shielding layer can face outwards, avoiding the problem of salt crystal accumulation and heat dissipation obstruction in the corrugated structure. This invention completely solves the industry pain point that fixed shells in island scenarios cannot simultaneously achieve wind pressure resistance, heat dissipation, and salt spray corrosion resistance, and achieves synergistic optimization of multiple core performance characteristics.

[0014] In this invention, multiple sets of electromagnetic shielding layers and wave-shaped flip panels driven by rotating shafts and capable of synchronously flipping and opening are set inside the flip-able side panel. In the closed state, the beryllium copper spring sheets at the edge of the electromagnetic shielding layer are tightly attached to form a continuous and uninterrupted electromagnetic shielding cavity, which resists the strong electromagnetic interference and harmonic fluctuations brought by the grid connection of distributed energy on the island. In the open state, a heat dissipation channel that runs through the inside and outside of the cabinet can be formed. With the help of the U-shaped mesh mounting plate inside the cabinet, natural convection heat dissipation is achieved. The electromagnetic shielding, heat dissipation and sealing protection performance can be balanced without the need for additional heat dissipation fans, avoiding the problems of high fan failure rate and damage to the cabinet's protective performance.

[0015] In this invention, by combining the switching of the front and back sides of the side plate flipping mechanism with the opening and closing angle adjustment of the heat dissipation adjustment mechanism, the operating modes can be flexibly switched to adapt to various operating conditions such as normal operation, high temperature and high load, extreme typhoon protection, and typhoon-day load operation according to the dynamic changes in the island scenario. There is no need to compromise parameters for a single operating condition, which completely solves the problem that the fixed shell can only adapt to a single operating condition and has insufficient performance in all operating conditions. It perfectly adapts to the operating needs of the island microgrid for dynamic changes in weather and power load.

[0016] In this invention, by adopting a side panel flipping mechanism with a purely mechanical structure, the working condition switching of the cabinet protection structure can be completed by manual operation alone, without relying on electronic control components such as sensors and controllers. It can still stably achieve function switching under extreme working conditions such as typhoons and power outages. At the same time, the waterproof and dustproof micro drive motor is only used for the opening and closing adjustment of the heat dissipation channel, without affecting the reliability of the core protection function, and is fully adapted to the unattended and long-term maintenance-free operation requirements of island scenarios.

[0017] In this invention, a single cabinet can achieve multi-condition and full-scenario adaptation without the need to customize multiple models of cabinets for different application scenarios on islands. This significantly reduces the procurement, inventory, and maintenance costs of smart grid distribution terminals. At the same time, the flip-switchable structure avoids the salt crystal accumulation and corrosion problem caused by long-term exposure of the corrugated surface. Combined with the fully sealed structure in the closed state, it greatly extends the service life of the cabinet in the high salt spray environment of islands and reduces the frequency and difficulty of maintenance in island scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the U-shaped mesh mounting plate of the present invention; Figure 3 This is a schematic diagram of the structure of the fixed wave back plate of the present invention; Figure 4 This is a schematic diagram of the structure of the distribution box cabinet of the present invention; Figure 5 This is a schematic diagram of the electromagnetic shielding layer of the present invention; Figure 6 This is a schematic diagram of the structure of the flip-up side panel of the present invention; Figure 7 This is a schematic diagram of the structure of the wave-shaped flip panel of the present invention; Figure 8 This is a schematic diagram of the sliding shaft structure of the present invention; Figure 9 This is a schematic diagram of the sliding groove of the present invention; Figure 10 This is the present invention. Figure 7 An enlarged schematic diagram of the structure at point A.

[0019] In the diagram, the correspondence between the component names and the attached drawing numbers is as follows: 1. Electromagnetic shielding layer; 2. Beryllium copper spring sheet; 3. First rotating shaft; 4. Limiting rod; 5. Second rotating shaft; 6. Wave-shaped flip panel; 7. Distribution box cabinet; 8. Locking screw; 9. Side hole; 10. Sliding groove; 11. U-shaped mesh mounting plate; 12. Flip-up side plate; 13. Sliding rotating shaft; 14. Mounting screw hole; 15. Fixed wave-shaped back plate. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0021] Please see Figures 1-10 This invention provides a smart grid-compatible multi-condition distribution box housing, comprising a distribution box cabinet 7, side panel flipping mechanisms symmetrically arranged on the left and right sides of the distribution box cabinet 7, multiple heat dissipation adjustment mechanisms disposed within the side panel flipping mechanisms, a U-shaped mesh mounting plate 11 fixedly installed inside the distribution box cabinet 7, and a fixed wave-shaped back plate 15 fixedly installed on the back of the distribution box cabinet 7. The side panel flipping mechanism includes a flippable side panel 12, a sliding rotating shaft 13, and a locking screw 8. The heat dissipation adjustment mechanism includes a first rotating shaft 3, a second rotating shaft 5, a limiting rod 4, an electromagnetic shielding layer 1, a beryllium copper spring sheet 2, and a wave-shaped flipping panel 6.

[0022] Specifically, refer to Figure 1 , Figure 2 and Figure 9 As shown, the distribution box cabinet 7 is a vertical square metal cabinet used to support the overall structure and internal electrical components. The front of the distribution box cabinet 7 is equipped with a double door with a locking structure. The surface of the double door is affixed with a high-voltage warning sign. A fixed corrugated back plate 15 is fixedly installed on the back of the distribution box cabinet 7. The fixed corrugated back plate 15 adopts a vertical continuous trapezoidal corrugated structure, with the corrugations facing outwards from the distribution box cabinet 7. This is used to improve the wind pressure resistance of the back of the distribution box cabinet 7. It can be combined with the corrugated structure on the flip-up side plate 12 to form an omnidirectional wind pressure resistance system, which is suitable for the protection needs of extreme working conditions during typhoons. The distribution box cabinet 7 has side holes 9 on both the left and right sides that pass through the inside and outside of the cabinet. The outline of the side holes 9 is adapted to the outer outline of the flip-up side panel 12 to accommodate the installation, horizontal sliding and 180° flipping of the flip-up side panel 12. The inner wall of each side hole 9 has horizontally extending sliding grooves 10 at both the upper and lower ends. The length of the sliding grooves 10 is consistent with the horizontal length of the side hole 9, which provides guidance and stroke limit for the horizontal sliding of the sliding shaft 13 and avoids deviation and jamming during the sliding process.

[0023] It should be noted that the reference Figure 4 , Figure 5 and Figure 8 As shown, at the upper and lower ends of the distribution box cabinet 7, corresponding to the positions of the side holes 9, there are two symmetrical through holes. The inner diameter of the through holes matches the outer diameter of the locking screw 8. The positions of the through holes correspond one-to-one with the positions of the mounting screw holes 14 on the flip-up side plate 12, ensuring that after the flip-up side plate 12 is slid or flipped, the locking screw 8 can smoothly pass through the through holes and the mounting screw holes 14 to lock. The bottom of the distribution box cabinet 7 is provided with an integrated mounting base, and the base is provided with anchor bolt holes to fix the distribution box cabinet 7 as a whole on the outdoor foundation to prevent the cabinet from tilting or shifting during typhoon conditions.

[0024] The distribution box cabinet 7 is equipped with a set of completely symmetrical side panel flipping mechanisms on both the left and right sides. Each set of side panel flipping mechanisms includes a flippable side panel 12, a sliding shaft 13, and a locking screw 8.

[0025] Specifically, refer to Figure 4 , Figure 5 and Figure 8 As shown, the rotatable side panel 12 is a rectangular metal frame structure, and its outer contour dimensions are adapted to the inner contour dimensions of the side hole 9. A sliding shaft 13 is fixed through the center of the side end of the rotatable side panel 12. The upper and lower ends of the sliding shaft 13 are respectively embedded in the sliding grooves 10 at the upper and lower ends of the inner wall of the side hole 9. The sliding shaft 13 can slide horizontally along the sliding grooves 10 and rotate 360° around its own axis, thereby driving the rotatable side panel 12 to achieve horizontal displacement and 180° flipping action. The upper and lower ends of the rotatable side panel 12 are provided with mounting screw holes 14. The two mounting screw holes 14 are symmetrically arranged with the sliding shaft 13 as the center. After the rotatable side panel 12 completes the horizontal sliding or flipping action, the locking screw 8 is passed through the corresponding hole in the distribution box cabinet 7 and screwed into the mounting screw hole 14 of the rotatable side panel 12, so as to realize the rigid locking and fixing of the rotatable side panel 12 and the distribution box cabinet 7, and prevent loosening or displacement under outdoor conditions.

[0026] It should be noted that the reference Figure 8 As shown, wear-resistant sliding bearings are fitted at both the upper and lower ends of the sliding shaft 13. The outer ring of the bearing fits tightly against the inner wall of the sliding groove 10, which can significantly reduce the sliding and rotational resistance of the sliding shaft 13 in the sliding groove 10, avoid jamming, and compensate for slight installation deviations, ensuring the stability of the flip-up side panel 12 during the flipping process. A ring of elastic sealing strip is embedded around the frame edge of the flip-up side panel 12. When the flip-up side panel 12 is locked and fixed, the elastic sealing strip fits tightly against the inner wall of the side hole 9, forming an annular sealing structure, which can effectively prevent rainwater, salt spray, and dust from entering the cabinet through the gap between the side panel and the cabinet, ensuring the IP65 protection level of the cabinet.

[0027] Within the rectangular frame of each set of flip-up side panels 12, multiple sets of heat dissipation adjustment mechanisms are arranged at equal intervals along the vertical direction. Each set of heat dissipation adjustment mechanisms includes a first rotating shaft 3, a second rotating shaft 5, a limiting rod 4, an electromagnetic shielding layer 1, a beryllium copper spring sheet 2, a wave-shaped flip panel 6, and a micro drive motor.

[0028] Specifically, refer to Figure 6 , Figure 7 and Figure 10As shown, the first rotating shaft 3 and the second rotating shaft 5 are arranged horizontally and parallel to each other. Both ends of the two are rotatably mounted on the inner wall of the frame of the flip-up side plate 12 through bearings. A limit rod 4 is provided between the ends of the first rotating shaft 3 and the second rotating shaft 5 on the same side. The two ends of the limit rod 4 are rotatably connected to the ends of the first rotating shaft 3 and the second rotating shaft 5 through bushings, respectively, to limit the axial distance between the first rotating shaft 3 and the second rotating shaft 5, to ensure the coaxiality and structural stability of the two during rotation, and to avoid the problems of shaft jamming and misalignment.

[0029] An electromagnetic shielding layer 1 is fixedly connected to the outer wall of the first rotating shaft 3. The electromagnetic shielding layer 1 is a multi-layer planar structure composed of copper foil, galvanized steel plate, and nano-absorbing material. A ring of beryllium copper springs 2 is fixedly installed around the perimeter of the electromagnetic shielding layer 1. When the electromagnetic shielding layer 1 is in a closed state, the beryllium copper springs 2 are tightly fitted with the edges of the adjacent electromagnetic shielding layers 1 above and below, forming a continuous and uninterrupted electromagnetic shielding cavity, which can effectively block external electromagnetic interference and power grid harmonics from entering the cabinet. A wave-shaped flip panel 6 is fixedly connected to the outer wall of the second rotating shaft 5. The outer surface of the wave-shaped flip panel 6 is a vertical continuous trapezoidal corrugated structure. Its waveform parameters are completely consistent with the fixed wave-shaped back plate 15 on the back of the distribution box cabinet 7, which is used to improve the wind pressure resistance of the side of the distribution box cabinet 7 and adapt to the protection requirements of extreme typhoon conditions.

[0030] It should be noted that the reference Figure 7 and Figure 10 As shown, a micro drive motor is connected to one end of the first rotating shaft 3 and the second rotating shaft 5. The micro drive motor is fixedly installed on the inner wall of the frame of the flip-up side panel 12. The micro drive motor is waterproof and dustproof and can adapt to harsh outdoor working conditions. The micro drive motor is electrically connected to the control panel on the distribution box cabinet 7. The operator can control the forward and reverse rotation of the micro drive motor through the control panel, thereby driving the first rotating shaft 3 and the second rotating shaft 5 to rotate synchronously, realizing the opening and closing action and the adjustment of the flip angle of the electromagnetic shielding layer 1 and the wave flip panel 6. A biomimetic hydrophobic anti-crystal coating can be added to the corrugated surface of the wave flip panel 6, which can effectively block the adhesion of salt spray in coastal and island scenes. Combined with the closed sealing structure, double anti-salt spray protection is achieved.

[0031] refer to Figure 2 , Figure 4 and Figure 9As shown, a U-shaped mesh mounting plate 11 is fixedly installed inside the distribution box cabinet 7. The opening of the U-shaped mesh mounting plate 11 faces the front of the distribution box cabinet 7. The back plate of the U-shaped mesh mounting plate 11 is used to fix and install the electronic components, intelligent monitoring terminals, circuit breakers and other core components of the distribution box. The left and right side plates of the U-shaped mesh mounting plate 11 are metal filter structures. The pore size of the filter can block dust and insects from entering the distribution box cabinet 7, while not affecting air circulation. It can quickly conduct the heat generated by the operation of the electronic components in the cabinet to the heat dissipation channels on both sides of the distribution box cabinet 7, which greatly improves the heat dissipation efficiency inside the cabinet.

[0032] In summary, when the operator starts the micro drive motor through the control panel, it can drive the corresponding first rotating shaft 3 and second rotating shaft 5 to rotate synchronously, thereby driving the electromagnetic shielding layer 1 and the wave flip panel 6 to flip synchronously, realizing the opening and closing of the heat dissipation channel and the adjustment of the opening degree, and completing the function switching under different working conditions.

[0033] refer to Figure 1 , Figure 5 and Figure 9 As shown, the multi-condition switching and operation process of this solution is as follows: Under normal operating conditions, priority is given to ensuring electromagnetic shielding and basic protection. At this time, the electromagnetic shielding layer 1 of the flip-up side panel 12 faces the outside of the distribution box cabinet 7. The sliding shaft 13 slides to the front end of the sliding groove 10. The locking screw 8 passes through the through hole at the front end of the distribution box cabinet 7 and is screwed into the mounting screw hole 14 of the flip-up side panel 12, which rigidly locks and fixes the flip-up side panel 12 to the distribution box cabinet 7. At the same time, the micro drive motor is controlled by the control panel to drive the first shaft 3 and the second shaft 5 to rotate, so that the electromagnetic shielding layer 1 and the wave flip panel 6 are both in a horizontal closed state. The beryllium copper spring pieces 2 on the edges of the upper and lower adjacent electromagnetic shielding layers 1 are tightly attached to form a complete continuous electromagnetic shielding layer, which can effectively block electromagnetic interference and grid harmonics generated by external photovoltaic grid connection, charging piles, substations and other scenarios, and ensure the sampling accuracy and operational stability of the intelligent monitoring terminal in the cabinet. At the same time, the closed panel structure can achieve IP65 protection, effectively preventing dust, rainwater and salt spray from entering the interior of the distribution box cabinet 7.

[0034] Under high temperature and high load conditions, heat dissipation performance is prioritized. The orientation and locked state of the flip-up side panel 12 are kept unchanged. The micro drive motor is controlled to rotate forward through the control panel, which drives the first rotating shaft 3 and the second rotating shaft 5 to rotate synchronously. This causes the electromagnetic shielding layer 1 and the wave-shaped flip panel 6 to flip downward synchronously, forming an inverted V-shaped opening structure. Multiple sets of inverted V-shaped openings arranged vertically create a through heat dissipation channel between the inside and outside of the distribution box cabinet 7. Hot air inside the cabinet passes through the filter structure of the U-shaped mesh mounting plate 11 and is quickly discharged outside the cabinet through the heat dissipation channel. Cold air from outside can enter the cabinet simultaneously to form natural convection heat dissipation, which greatly improves heat dissipation efficiency and copes with high temperature and full load operation of equipment in summer. At the same time, the opening size of the heat dissipation channel can be controlled by adjusting the flip angle through the control panel to adapt to different equipment loads and ambient temperature requirements.

[0035] Under extreme typhoon conditions, priority should be given to ensuring wind pressure resistance and sealing protection. First, unscrew the locking screw 8 to release the lock. Slide the sliding shaft 13 along the sliding groove 10 to the rear end, causing the flip-up side panel 12 to move outward, avoiding interference with the distribution box cabinet 7 during flipping. Then, rotate the flip-up side panel 12 180° around the sliding shaft 13, so that the wavy flip panel 6 side of the flip-up side panel 12 faces the outside of the distribution box cabinet 7. Next, slide the sliding shaft 13 to the front end of the sliding groove 10, pass the locking screw 8 through the through hole at the front end of the distribution box cabinet 7, and screw it into the mounting screw hole 14 of the flip-up side panel 12 to complete the flip-up side panel. When 12 is flipped and rigidly locked, the wave-shaped flip panels 6 on the left and right sides of the distribution box cabinet 7 and the fixed wave-shaped back plate 15 on the back form a three-sided corrugated wind pressure-resistant structure. The corrugated surface can effectively disperse the alternating positive and negative wind pressure impact brought by the typhoon, avoid the deformation of the sheet metal of the distribution box cabinet 7 and the failure of the sealing structure, and greatly improve the typhoon resistance of the distribution box cabinet 7. At the same time, the micro drive motor is controlled by the control panel to drive the wave-shaped flip panels 6 and the electromagnetic shielding layer 1 to return to the closed state, forming a complete closed shell, blocking the rainwater and salt spray brought by the typhoon from entering the interior of the distribution box cabinet 7, and protecting the internal electronic components from corrosion.

[0036] Under high temperature and high load conditions during typhoons, it can balance wind pressure resistance and heat dissipation performance. Under typhoon conditions, the wave-shaped flip panel 6 of the flip-able side panel 12 is kept locked with the outside facing outwards. The micro drive motor is controlled by the control panel to drive the wave-shaped flip panel 6 and the electromagnetic shielding layer 1 to flip at a small angle, forming a narrow slit heat dissipation channel. The continuous corrugated structure on the outside ensures the wind pressure resistance of the distribution box cabinet 7, while the narrow slit channel allows air circulation inside and outside the cabinet, balancing heat dissipation and protection performance, and avoiding overheating and tripping problems when the equipment is running under high load during typhoons.

[0037] It should be noted that this solution can be used with the temperature sensor installed inside the cabinet to realize the automatic opening and closing adjustment of the heat dissipation channel. When the temperature inside the cabinet exceeds the preset threshold, the control system automatically controls the micro drive motor to open the heat dissipation channel and automatically closes it after the temperature drops. This is suitable for the operation requirements of unattended smart grid areas. The flipping operation of the flip side panel 12 does not require disassembling the cabinet. Simply turn the locking screw 8 and slide and flip the flip side panel 12 to complete the front and back switching. The operation is simple and convenient and suitable for the operation and maintenance needs of outdoor sites.

[0038] For working principle, please refer to [link / reference]. Figures 1-10 As shown, during normal operation, the electromagnetic shielding layer 1 of the flip-up side panel 12 faces outward and is locked in place. The heat dissipation adjustment mechanism is in a closed state, and the beryllium copper spring sheet 2 is tightly fitted to form a continuous electromagnetic shielding cavity, which takes into account both basic protection and electromagnetic shielding functions, and is suitable for the normal outdoor operation scenario of smart grids. When the temperature is high in summer or the equipment is under high load, the micro drive motor is controlled by the control panel to drive the first rotating shaft 3 and the second rotating shaft 5 to rotate, so that the electromagnetic shielding layer 1 and the wave flip panel 6 flip to form an inverted V-shaped heat dissipation channel. With the filter structure of the U-shaped mesh mounting plate 11, air convection between the inside and outside of the cabinet is realized, and the heat inside the cabinet is quickly dissipated, avoiding To prevent equipment from overheating and tripping, when a typhoon warning is received or extreme typhoon conditions are entered, the locking screw 8 is unscrewed to release the lock, and the slidable and flip-up side panel 12 is slid and flipped so that the wave-shaped flip panel 6 faces outward and is then locked and fixed. At this time, the wave-shaped flip panels 6 on the left and right sides of the cabinet and the fixed wave-shaped back panel 15 on the back form an omnidirectional corrugated wind pressure-resistant structure, which greatly improves the cabinet's resistance to deformation. At the same time, the closed heat dissipation adjustment mechanism forms a fully enclosed shell, blocking rainwater and salt spray from entering. If the equipment still needs to operate under high load during typhoon days, the wave-shaped flip panel 6 can be flipped at a small angle to form a narrow slit heat dissipation channel with the electromagnetic shielding layer 1, taking into account both wind pressure resistance and heat dissipation performance. The entire device can be switched between the front and back sides via the flip-out side panel 12 to achieve multi-functional adaptability to various working conditions, such as wind pressure resistance, electromagnetic shielding, and salt spray protection. The opening and closing angle of the heat dissipation adjustment mechanism can be adjusted to achieve a balance between heat dissipation and protection in different scenarios. The pure mechanical structure combined with simple electronic control operation ensures high reliability under extreme working conditions. It is fully adaptable to the operation requirements of various scenarios such as outdoor distribution areas of smart grids, island microgrids, and typhoon-prone areas, solving the industry pain point that existing fixed-shell distribution boxes cannot take into account the performance of multiple working conditions.

[0039] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An open-close multi-working condition power distribution box shell for smart grid, comprising a power distribution box cabinet body (7), characterized in that: The back of the distribution box cabinet (7) is fixed with a fixed wave back plate (15) for improving wind pressure resistance. Both sides of the distribution box cabinet (7) are provided with side panel flipping mechanisms. The side panel flipping mechanism includes a flipable side panel (12). A sliding rotating shaft (13) is fixed through the side end of the flipable side panel (12). The upper and lower ends of the flipable side panel (12) are provided with mounting screw holes (14). A locking screw (8) for locking the flipable side panel (12) is provided between the mounting screw hole (14) and the distribution box cabinet (7). Multiple heat dissipation adjustment mechanisms are arranged within the frame of the flip-up side plate (12). Each heat dissipation adjustment mechanism includes an electromagnetic shielding layer (1) and a wave flip panel (6). The electromagnetic shielding layer (1) has beryllium copper springs (2) fixed around its perimeter for attaching to adjacent shielding layers. The outer surface of the wave flip panel (6) is a vertical continuous trapezoidal corrugated structure with waveform parameters consistent with those of the fixed wave back plate (15).

2. The open-close multi-working-condition distribution box shell for smart grid of claim 1, wherein, The distribution box cabinet (7) has side holes (9) that pass through the inside and outside of the cabinet on both the left and right sides. The inner walls of the side holes (9) have horizontally extending sliding grooves (10) at both the upper and lower ends. Both the upper and lower ends of the sliding shaft (13) are slidably installed in the sliding groove (10).

3. The casing of a smart grid-compatible multi-condition distribution box as described in claim 2, characterized in that, The inside of the distribution box cabinet (7) is fixed with a U-shaped mesh mounting plate (11) for installing electrical components.

4. The casing of a smart grid openable multi-condition distribution box as described in claim 3, characterized in that, The opening of the U-shaped mesh mounting plate (11) is set facing the front of the distribution box cabinet (7), and the left and right side plates of the U-shaped mesh mounting plate (11) are metal filter structures.

5. The casing of a smart grid openable multi-condition distribution box as described in claim 4, characterized in that, A first rotating shaft (3) is fixedly installed on the electromagnetic shielding layer (1), and a second rotating shaft (5) is fixedly installed on the wave-shaped flip panel (6). A limiting rod (4) for limiting the axial distance is installed between the same side ends of the first rotating shaft (3) and the second rotating shaft (5).

6. The casing of a smart grid openable multi-condition distribution box as described in claim 5, characterized in that, Both the first rotating shaft (3) and the second rotating shaft (5) are connected to a miniature drive motor for driving the rotating shaft to rotate.

7. The casing of a smart grid openable multi-condition distribution box as described in claim 6, characterized in that, Wear-resistant sliding bearings are fitted at both the upper and lower ends of the sliding shaft (13), and the outer ring of the wear-resistant sliding bearing is in contact with the inner wall of the sliding groove (10).

8. The casing of a smart grid openable multi-condition distribution box as described in claim 7, characterized in that, The frame of the flip-up side panel (12) is fitted with elastic sealing strips around its perimeter for sealing gaps.

9. The casing of a smart grid openable multi-condition distribution box as described in claim 8, characterized in that, The distribution box cabinet (7) has symmetrical through holes at the upper and lower ends corresponding to the side holes (9). The locking screw (8) passes through the through holes and is threaded to the mounting screw hole (14).

10. The casing of a smart grid openable multi-condition distribution box as described in claim 9, characterized in that, The micro drive motor is fixedly installed on the inner wall of the frame of the flip-up side plate (12), and the micro drive motor is electrically connected to the control panel on the distribution box cabinet (7).

Images