A high-voltage switchgear of protection class IP41

Abstract

This invention discloses a high-voltage switchgear with an IP41 protection rating, belonging to the technical field of high-voltage switchgear. In the device, an integrated top cover has a water-retaining edge near the rear edge of the cabinet, with the water-retaining edge continuously arranged along the length of the integrated top cover. A waterproof sealing strip is provided on the inner side of the integrated top cover. A pressure relief box frame is assembled onto the integrated top cover and is equipped with an annular sealing rubber gasket. The pressure relief box frame is equipped with a fan and correspondingly has fan cooling mesh holes. The cabinet gap protection structure is a water-retaining flange located on one vertical edge of the integrated top cover. A secondary instrument compartment cover and an eyebrow bend plate are also included. The front edges of the secondary instrument compartment cover and the eyebrow bend plate have outwardly inclined flanges. A waterproof component is provided between the secondary instrument compartment cover and the eyebrow bend plate and the cabinet. This invention has a compact structure and is easy to maintain; it can relatively meet the IP41 dustproof and vertical drip resistance requirements and is suitable for heat dissipation needs such as high-current operating conditions.

Description

Technical Field

[0001] This invention belongs to the technical field of high voltage switchgear, specifically relating to a high voltage switchgear with an IP41 protection rating. Background Technology

[0002] High-voltage switchgear is widely used in industrial control, building power distribution, and electromechanical equipment applications. Its protective performance directly affects the operational safety and service life of the equipment. IP41 protection rating, a commonly used standard for this type of equipment, explicitly requires that the equipment possess the core functions of preventing the intrusion of solid foreign objects larger than 1mm and preventing vertical dripping water. Currently, mainstream high-voltage switchgear on the market has many unresolved issues in its protective structure design, making it difficult for it to consistently meet IP41 protection requirements.

[0003] Currently, most existing equipment top covers are constructed from multiple panels, with the seams being weak points in the seal. Over time, the seals at these seams are prone to aging and failure, allowing water droplets to easily seep into the equipment, causing short circuits, corrosion, and other malfunctions in electrical components. Furthermore, the modular structure increases assembly steps, leading to low production efficiency, and the reliability of the seals significantly decreases over time. Pressure relief covers or boxes, as crucial components of equipment safety protection, lack effective waterproof sealing measures when assembled with the top cover. When the equipment is outdoors or in humid environments, water droplets can easily seep into the cabinet through the gap between the pressure relief device and the top cover, damaging internal components and causing the protective function to fail. Moreover, when multiple switchgear units are installed side-by-side, natural gaps form between the cabinets, and no specific protective structure is currently in place for these gaps. Vertically falling water droplets can pass through these gaps. Therefore, in summary, current high-voltage power distribution equipment suffers from a contradiction between protection and heat dissipation due to unreasonable component layout. Water is prone to seepage at junctions and splicing points, and heat dissipation may be insufficient when applied to high-current conditions. Summary of the Invention

[0004] This invention provides a high-voltage switchgear with an IP41 protection rating, aiming to solve the problems in current high-voltage power distribution equipment where there is a contradiction between protection and heat dissipation due to unreasonable component arrangement, water leakage at junctions and splicing points, and insufficient heat dissipation when applied to high-current conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a high-voltage switchgear with an IP41 protection rating, comprising a cabinet, an integrated top cover, a pressure relief box frame, a parallel cabinet gap protection structure, a secondary instrument compartment, and a small busbar compartment protection structure, wherein: The integrated top cover is a one-piece molded structure that is sealed and connected to the cabinet. The integrated top cover has a water-retaining edge near the rear edge of the cabinet. The water-retaining edge is continuously arranged along the length of the integrated top cover. A waterproof sealing cotton strip is provided on the inside of the integrated top cover. The pressure relief box frame is assembled on the integrated top cover and an annular sealing rubber gasket is set between the assembly surfaces. The side plate of the pressure relief box frame is equipped with a fan and corresponding fan heat dissipation mesh is opened; and the cabinet gap protection structure is a water-blocking flange set on the vertical edge of one side of the integrated top cover. The protective structure of the secondary instrument room and small busbar room includes a secondary instrument room cover plate and an eyebrow bend plate. The front edges of the secondary instrument room cover plate and the eyebrow bend plate have outwardly inclined flanges. Waterproof components are installed between the secondary instrument room cover plate and the eyebrow bend plate and the cabinet.

[0006] In some implementations, the one-piece top cover is a seamless structure formed by bending a single piece of board, with the water-retaining eaves facing the back of the cabinet and integrally formed with the one-piece top cover. The waterproof sealing strip is made of rubber.

[0007] Furthermore, the waterproof sealing strips are continuously and without breaks along the inner edge of the integrated top cover. After being compressed, the waterproof sealing strips form a sealing layer, which can prevent dust and water droplets from penetrating into the interior of the cabinet.

[0008] In some embodiments, the annular sealing rubber gasket is made of rubber and is laid on the entire assembly surface of the pressure relief box frame and the integrated top cover, forming a gapless sealing structure after the bolts are tightened.

[0009] In some embodiments, the fan cooling mesh has several openings, which are located on the periphery of the fan and face the front and rear of the cabinet. A metal dustproof mesh is installed on the inner side of the fan cooling mesh.

[0010] In some implementations, the water-blocking flange is an extension structure formed by bending an integral top cover. The water-blocking flange extends towards the outside of the cabinet, and the water-blocking flanges of adjacent cabinets overlap each other to cover the gaps between the cabinets. An installation gap is reserved at the overlap of the water-blocking flange and filled with waterproof sealant.

[0011] In some implementations, the pressure relief box frame is provided with a protective top cover, the edges of which can vertically cover the fan cooling mesh.

[0012] In some implementations, the inclined flange of the secondary instrument compartment cover and the brow bend plate and the cabinet have a smooth transition structure. The inclined flange is used to guide water droplets to drip outward and prevent solid foreign objects from accumulating.

[0013] In some implementations, the waterproof component uses waterproof gaskets made of rubber, which are fitted onto the bolt connections between the secondary instrument compartment cover and the flange plate and the cabinet.

[0014] In some implementations, the integrated top cover is connected to the cabinet by blind rivets, the pressure relief box frame is bolted to the preset mounting position of the integrated top cover, and the fan can be aligned with the fan heat dissipation mesh to form a through-flow convection duct.

[0015] The present invention provides a high-voltage switchgear with an IP41 protection rating, which has at least the following beneficial effects.

[0016] This invention provides relatively comprehensive protection through the coordinated layout of an integrated top cover, pressure relief box frame, water-retaining flange, secondary instrument compartment cover, and eyebrow-shaped curved plate. The integrated top cover adopts a one-piece molded structure and is sealed to the cabinet. Combined with the water-retaining eaves continuously arranged along the rear length and the waterproof sealing strips on the inner side, it effectively blocks the path of vertical dripping water and dust from entering the equipment from the top cover area. The mounting surface of the pressure relief box frame and the integrated top cover is equipped with an annular sealing rubber gasket, which can seal the assembly gap and prevent water droplets from entering the pressure relief assembly. The junction between the top cover and the cabinet is integrated into the cabinet body. The fan ventilation holes on the side panels maintain the basic heat dissipation function of the equipment while preserving its protective integrity. The water-retaining flange on the side of the integrated top cover physically blocks the gaps formed after cabinet assembly, preventing vertical dripping water from entering the equipment through these gaps. The inclined flanges on the front of the secondary instrument compartment cover and the bend in the flange guide water droplets away from the fixed gaps between the cover and the cabinet body. Combined with the waterproof components between the cabinets, this prevents water droplets and dust from entering the secondary instrument compartment and the small busbar compartment, thus avoiding impact on the operation of precision components. This invention achieves multi-part coordinated protection through a compact and convenient structure, meeting the IP41 protection rating. It can prevent the intrusion of solid foreign objects and vertical dripping water to a certain extent, effectively improving the safety and stability of equipment operation and demonstrating certain engineering applicability. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the invention and constitute a part of this invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of the structure of a high-voltage switchgear with an IP41 protection level according to the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of an integrated top cover in a high-voltage switchgear with an IP41 protection rating according to the present invention; Figure 3 This is a schematic diagram of the pressure relief box frame in a high-voltage switchgear with an IP41 protection level according to the present invention.

[0020] The attached diagram shows the following labels: 1. Secondary instrument compartment cover; 2. Pressure relief box frame; 3. Water-retaining flange; 4. Integrated top cover; 5. Cabinet; 6. Fan; 7. Fan cooling mesh. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0027] How to provide a high-voltage switchgear that is simple in structure, has stable protection performance, and is easy to assemble, and can relatively meet the requirements of IP41 protection level.

[0028] like Figure 1 As shown, this invention provides a high-voltage switchgear with an IP41 protection rating, including a cabinet 5, an integrated top cover 4, a pressure relief box frame 2, a parallel cabinet gap protection structure, a secondary instrument compartment, and a small busbar compartment protection structure, wherein: The integrated top cover 4 is a one-piece molded structure that is sealed and connected to the cabinet body. The integrated top cover 4 has a water-retaining eaves on the edge near the rear side of the cabinet body 5. The water-retaining eaves are continuously arranged along the length of the integrated top cover 4. A waterproof sealing cotton strip is provided on the inner side of the integrated top cover 4. The pressure relief box frame 2 is assembled on the integrated top cover 4 and an annular sealing rubber gasket is provided between the assembly surfaces. The side plate of the pressure relief box frame 2 is equipped with a fan 6 and corresponding fan heat dissipation mesh 7 is provided. The cabinet gap protection structure is a water-blocking flange 3 set on the vertical edge of one side of the integrated top cover 4. The protective structure of the secondary instrument room and the small busbar room includes a secondary instrument room cover plate 1 and an eyebrow bend plate. The front edges of the secondary instrument room cover plate 1 and the eyebrow bend plate have outwardly inclined flanges. Waterproof components are provided between the secondary instrument room cover plate 1 and the eyebrow bend plate and the cabinet 5.

[0029] This invention discloses a high-voltage switchgear with an IP41 protection rating. It employs an integrated molding process, reducing the use of bolts, gaskets, and other connecting components. The overall structure has relatively few redundant parts, reducing the need for piece-by-piece alignment during assembly. The assembly process is reduced from five to six steps to two, significantly simplifying the assembly workload. The seamless design improves the protection against water droplet penetration. Combined with a 25mm extended water-resistant eave, it guides vertical water droplets to fall a relatively long distance behind the cabinet 5, preventing water droplets from contacting the cabinet door's contact surface and meeting the IP41 protection against vertical dripping.

[0030] Furthermore, the water-blocking flange of the cabinet gap in this invention is an integrated extension structure of the one-piece top cover 4, requiring no additional independent parts. It can be achieved through a sheet metal bending process, and the processing steps are not relatively complex. It directly blocks the path of vertical water droplets intruding through the cabinet gap. In the past, there was a 2-3mm natural gap between the cabinets 5 after cabinet assembly. Vertical water droplets could easily seep into the interior of the cabinet 5 along the gap. The water-blocking flange guides the water droplets to the outside of the cabinet 5 through physical shielding, solving the hidden danger of vertical water droplet intrusion in IP41 protection.

[0031] Specifically, the design of the front flip-up edge (30° tilt) of the secondary instrument compartment eyebrow bend plate of the present invention achieves the protective function by adjusting the tilt angle (30°) of the front flip-up edge of the cover plate, without the need for additional dustproof and waterproof accessories; it can guide vertical water droplets to slide off along the outside of the flip-up edge, preventing water droplets from seeping in through the fixed gap between the cover plate and the eyebrow; it can block solid foreign objects (such as dust and fibers) larger than the preset size from accumulating in the gap, while meeting the IP41 requirements for protection against solid foreign object intrusion and vertical dripping water.

[0032] In addition, the pressure relief box frame 2 of the present invention is designed with fan heat dissipation mesh 7 in the front and rear directions to avoid the direct intrusion path of vertical water droplets. In some working conditions, in conjunction with an axial flow fan with a power of 33W, a through-flow convection air duct is formed with air intake in the cabinet and air outlet on the front and rear sides of the pressure relief box frame 2. The fan 6 mounting flange fits seamlessly with the edge of the fan heat dissipation mesh 7, without adding any new weak points in protection, so that high current equipment can achieve protection and heat dissipation at the same time.

[0033] Specifically, the integrated top cover 4 of this invention is a seamless structure formed by bending a single piece of material. The water-retaining eaves are integrally formed with the integrated top cover 4 and face the rear of the cabinet 5, eliminating the need for additional fasteners. This results in higher structural strength and stability. The rubber waterproof sealing strip possesses excellent waterproof and aging-resistant properties, further enhancing the sealing protection of the integrated top cover 4. The waterproof sealing strip is continuously and without breaks along the inner edge of the integrated top cover 4, forming a complete sealing layer after compression. This seamlessly seals the gap between the integrated top cover 4 and the frame of the cabinet 5, preventing dust and water droplets from intruding at the junction of the top cover and the cabinet.

[0034] Furthermore, in a high-voltage switchgear with an IP41 protection rating of the present invention, an annular sealing rubber gasket covers the entire assembly surface of the pressure relief box frame 2 and the integrated top cover 4. After the bolts are tightened, a gapless seal is formed, preventing water droplets from seeping into the interior of the cabinet 5 from the assembly gaps. The fan heat dissipation mesh 7 is opened on the front and rear side plates of the pressure relief box frame 2 and faces the front and rear direction of the cabinet 5. Combined with a metal dustproof mesh with a hole diameter not larger than a preset size, it can meet the ventilation and heat dissipation requirements under high current conditions and effectively block solid foreign objects from entering. The protective top cover edge of the pressure relief box frame 2 vertically covers the fan heat dissipation mesh 7, which can block the path of vertical dripping water falling into the heat dissipation mesh 7, thus achieving both protection performance and heat dissipation efficiency.

[0035] Furthermore, in a high-voltage switchgear with an IP41 protection rating of the present invention, the water-blocking flange 3 is an extension structure formed by bending an integral top cover 4, without the need for additional processing of independent parts. It extends towards the outside of the cabinet 5 and the water-blocking flanges 3 of adjacent cabinets 5 overlap each other, which can cover the gap between cabinets. An installation gap is reserved at the overlap to avoid assembly interference. After filling with waterproof sealant, the sealing and waterproof effect of the cabinet part is enhanced.

[0036] Furthermore, the secondary instrument compartment and small busbar compartment protective structure of this invention have a smooth transition structure between them and the cabinet 5, which can smoothly guide vertical dripping water to fall outwards, while preventing solid foreign objects from accumulating in the fixed gaps between the secondary instrument compartment and small busbar compartment protective structure and the cabinet 5, ensuring the dustproof and waterproof effect of the secondary instrument compartment and small busbar compartment protective structure. The integrated top cover 4 is connected to the cabinet 5 by blind rivets, and the pressure relief box frame 2 is assembled to the preset installation position of the integrated top cover 4 by bolts. The assembly process is simple and efficient, and the connection is stable and reliable. The fan 6 and the fan heat dissipation mesh 7 are aligned and assembled to form a through-flow convection air duct, which can quickly dissipate the heat inside the cabinet, adapt to the use requirements of high current conditions, and enable the equipment to meet the IP41 protection requirements and have better heat dissipation performance.

[0037] The following detailed description of a high-voltage switchgear with an IP41 protection rating according to the present invention will be provided through specific embodiments.

[0038] like Figures 1-3 As shown, the integrated top cover 4 of this invention is formed by integral bending of an aluminum-zinc coated sheet, resulting in a seamless, one-piece top cover with an overall thickness of 2mm, ensuring structural strength while maintaining lightweight design. Near the rear edge of the cabinet 5, an integrally formed water-retaining eaves facing the rear of the cabinet 5 are provided. These eaves are continuously arranged along the length of the integrated top cover 4, with a height of 15-20mm and an extension length of 25mm, forming a guiding and protective barrier: vertically falling water droplets, upon contact with the integrated top cover 4, flow along its surface towards the water-retaining eaves, and are guided by the eaves to drip a long distance towards the rear of the cabinet 5, preventing water droplets from penetrating the contact surface between the cabinet door and the cabinet 5. A waterproof sealing strip is affixed to the inner edge of the integrated top cover 4. The strip is 8-10mm wide and 5mm thick, made of EPDM rubber, possessing aging resistance and strong waterproof properties, enhancing the sealing effect between the top cover and the cabinet frame, and preventing dust and water droplets from intruding.

[0039] This invention discloses a high-voltage switchgear with an IP41 protection rating. An annular sealing rubber gasket, 20mm wide and 5mm thick, is installed at the assembly surface of the pressure relief box frame 2 and the integrated top cover 4 to ensure a tight seal after assembly, preventing water droplets from seeping in along the assembly gap. In high-current scenarios, fan cooling mesh holes 7 are provided on the side plates of the pressure relief box frame 2, and the fan cooling holes 7 on the front and rear side plates of the pressure relief box frame 2 are strictly positioned facing the front and rear directions of the cabinet 5. Figure 3 As shown, the pressure relief box frame 2 has a different airflow direction dimension than the fan 6, but the rest of the structure is the same. Each arranged pressure relief box frame 2 has a side plate, a fan 6, and a fan heat dissipation mesh 7 near the right side (the figure is a disassembly diagram and not all are shown). Optionally, the edge of the pressure relief box frame 2 has a protective top cover that can vertically cover the fan heat dissipation mesh 7 to prevent vertical water droplets from directly intruding. Vertically falling rainwater or dew will be blocked by the protective top cover of the pressure relief box frame 2. At the same time, the fan heat dissipation mesh 7 in the front and rear directions is designed to form an air convection channel, so that the internal heat of the cabinet 5 can be discharged relatively quickly. Under the premise of meeting the IP41 protection requirements, it can simultaneously protect and dissipate heat under high current conditions.

[0040] This invention features an integrally formed water-retaining flange 3 on the left vertical edge of the integrated top cover 4. The flange 3 is 25mm high and 2mm thick, matching the side panel of the cabinet 5. It extends 10mm outwards towards the cabinet 5. When multiple devices are installed side-by-side, the flanges 3 of adjacent cabinets 5 overlap, providing complete coverage of the gaps between the cabinets. Vertically falling water droplets are blocked by the flanges 3, preventing them from dripping into the equipment. A 2mm gap is left at the overlap of the flanges 3 to avoid installation interference. This gap can also be filled with waterproof sealant as needed to further enhance the sealing effect.

[0041] This invention discloses a high-voltage switchgear with an IP41 protection rating. The flanges of the secondary instrument compartment and the small busbar compartment are formed by stamping. The front edges of the secondary instrument compartment cover 1 and the flanges have outwardly inclined flanges, each 15mm long and 30° inclination. The inclined flanges smoothly transition into the secondary instrument compartment cover 1 and the flanges, guiding water droplets outwards along the flanges and preventing water droplets from seeping into the cabinet 5 through gaps. Waterproof gaskets made of EPDM rubber are installed at the fixing bolts of the secondary instrument compartment cover 1, the flanges, and the cabinet 5 to prevent water droplets from seeping in through the bolt hole gaps. This invention eliminates the risk of water leakage at the splicing by using an integrated top cover 4 with a 25mm water-retaining eave. The integrated top cover 4 is folded and formed in one piece, and the water-retaining flange blocks the seepage path of the gap. The secondary instrument room cover plate has a 30° inclined flange to achieve dual protection against dust and vertical dripping. The side plate of the pressure relief box frame 2 has horizontally oriented fan heat dissipation mesh holes 7, which, together with a metal dustproof mesh and an adapted axial flow fan 6, form an efficient convection air duct. The structure is simple and the cost is controllable. It meets the IP41 dustproof and vertical dripping requirements and can adapt to the heat dissipation needs of high current conditions of 2500A-4000A to a certain extent. It is easy to maintain and has high product consistency, making it suitable for multiple scenarios.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Anyone skilled in the art can readily implement the present invention according to the description and above. Any modifications, alterations, or equivalent variations made using the technical content disclosed above are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A high voltage switchgear of protection class IP41, characterized in that Includes cabinet (5), integrated top cover (4), pressure relief box frame (2), cabinet gap protection structure, secondary instrument room and small busbar room protection structure, wherein: The integrated top cover (4) is an integrally molded structure that is sealed and connected to the cabinet body. The integrated top cover (4) has a water-blocking eaves on the edge near the rear side of the cabinet body (5). The water-blocking eaves are continuously arranged along the length direction of the integrated top cover (4). A waterproof sealing cotton strip is provided on the inner side of the integrated top cover (4). The pressure relief box frame (2) is assembled on the integrated top cover (4) and an annular sealing rubber gasket is provided between the assembly surfaces. The side plate of the pressure relief box frame (2) is provided with a fan (6) and a corresponding fan heat dissipation mesh (7) is provided. The cabinet gap protection structure is a water-blocking flange (3) set on the vertical edge of one side of the integrated top cover (4). The protective structure of the secondary instrument room and the small busbar room includes a secondary instrument room cover plate (1) and an eyebrow bend plate. The front edges of the secondary instrument room cover plate (1) and the eyebrow bend plate have outwardly inclined flanges. A waterproof component is provided between the secondary instrument room cover plate (1) and the eyebrow bend plate and the cabinet (5).

2. High voltage switchgear of protection class IP 41 according to claim 1, characterized in that The integrated top cover (4) is a seamless structure formed by bending a whole board. The water-blocking eaves face the cabinet (5) and are integrally formed with the integrated top cover (4). The waterproof sealing cotton strip is made of rubber.

3. High voltage switchgear of protection class IP 41 according to claim 2, characterized in that The waterproof sealing cotton strip is arranged continuously without any breaks along the inner edge of the integrated top cover (4). After being compressed, the waterproof sealing cotton strip forms a sealing layer, which can prevent dust and water droplets from entering the interior of the cabinet (5).

4. High voltage switchgear of protection class IP 41 according to claim 1, characterized in that The annular sealing rubber gasket is made of rubber and is laid on the entire assembly surface of the pressure relief box frame (2) and the integrated top cover (4), forming a gapless sealing structure after the bolts are tightened.

5. High voltage switchgear of protection class IP 41 according to claim 1, characterized in that The fan heat dissipation mesh (7) has a plurality of holes, and the plurality of fan heat dissipation mesh (7) are opened on the periphery of the fan (6). The fan heat dissipation mesh (7) faces the front and rear direction of the cabinet (1). The inner side of the fan heat dissipation mesh (7) is equipped with a metal dustproof mesh.

6. High voltage switchgear of protection class IP 41 according to claim 1, characterized in that The water-blocking flange (3) is an extension structure formed by bending an integral top cover (4). The water-blocking flange (3) extends towards the outside of the cabinet (1). The water-blocking flanges (3) of adjacent cabinets (5) overlap each other to cover the gap between the cabinets. The overlapping part of the water-blocking flange (3) has an installation gap and is filled with waterproof sealant.

7. High voltage switchgear of protection class IP 41 according to claim 1, characterized in that The pressure relief box frame (2) is provided with a protective top cover, the edge of which can vertically cover the fan heat dissipation mesh (7).

8. High voltage switchgear of protection class IP 41 according to claim 1, characterized in that The secondary instrument room cover (1) and the inclined flange of the eyebrow bend plate and the cabinet (5) are connected by a smooth transition structure. The inclined flange is used to guide water droplets to drip outward and block the accumulation of solid foreign objects.

9. High voltage switchgear of protection class IP 41 according to claim 1, characterized in that The waterproof component uses a waterproof gasket, which is made of rubber. The waterproof gasket is fitted onto the bolt connection between the secondary instrument room cover plate (1) and the eyebrow bend plate and the cabinet (5).

10. The high-voltage switchgear with an IP41 protection rating according to claim 1, characterized in that, The integrated top cover (4) is connected to the cabinet (5) by a core-pulling rivet. The pressure relief box frame (2) is bolted to the preset installation position of the integrated top cover (4). The fan (6) can be aligned with the fan heat dissipation mesh (7) to form a through-flow convection air duct.

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