High-protection switch cabinet convenient to install and maintain

Abstract

The utility model provides a high-protection switch cabinet convenient to install and maintain, a front one-way overhaul channel structure is adopted, the front structure is in an inner and outer double-layer door body protection form, and a switch cabinet body comprises a cabinet body frame, an outer door, an inner door, an outer side plate, a bottom plate, a rainproof brim and an observation window assembly; the cabinet body frame is a main bearing structure of the switch cabinet body, the top end of the cabinet body frame is fixedly connected with a rainproof brim, the bottom end of the cabinet body frame is fixedly connected with a bottom plate, and the outer side plate is composed of a first side plate assembly, a second side plate assembly and a third side plate assembly which respectively correspond to the left side area, the right side area and the rear side area of the cabinet body frame. An embedded inner door is connected to the inner side of the front end of the cabinet body frame in an openable and closable manner, an observation window assembly is arranged on the outer door, and a plurality of ventilation holes communicated with the interior of the switch cabinet body are uniformly formed in the bottom end of the rainproof brim. On-site installation and maintenance are facilitated, when the side plates are locally damaged, only the damaged parts need to be replaced, and the protection capacity is improved.

Description

Technical Field

[0001] This application relates to the technical field of switch cabinets, and particularly to a highly protective switch cabinet that is convenient for installation and maintenance. Background Art

[0002] With the growth of the urban population and the increase in the number of transportation vehicles, the urban traffic pressure is constantly increasing, and the construction of urban rail transit is becoming increasingly important. The disconnector cabinet is a key device in the catenary power supply system of rail transit, and its protection performance directly affects the service life and operation safety of the device.

[0003] However, when the existing disconnector cabinets are used outdoors, they are easily affected by bad weather, resulting in insufficient protection, which may further lead to equipment failures or even accidents. Therefore, designing a new type of disconnector cabinet body structure with high protection performance to effectively cope with the complex outdoor environment is an urgent problem to be solved in the current technical field. Utility Model Content

[0004] To solve the problems raised in the above background art, this application provides a highly protective switch cabinet that is convenient for installation and maintenance, which is convenient for on-site installation and maintenance, and at the same time improves the protection ability of the switch cabinet.

[0005] To solve the above technical problems, this application adopts the following technical solutions:

[0006] A highly protective switch cabinet that is convenient for installation and maintenance, including a switch cabinet body. The switch cabinet body adopts a front single-way maintenance channel structure. The front structure of the switch cabinet body is a double-layer door body protection form inside and outside. The switch cabinet body includes a cabinet frame, an outer door, an inner door, an outer side plate, a bottom plate, a rainproof eaves, and an observation window assembly;

[0007] The cabinet frame is the main load-bearing structure of the switchgear cabinet. A rainproof eaves is fixedly connected to the top end of the cabinet frame, and a bottom plate is fixedly connected to the bottom end of the cabinet frame. The outer side plate is composed of a first side plate assembly, a second side plate assembly, and a third side plate assembly corresponding to the left, right, and rear regions of the cabinet frame respectively. The first side plate assembly, the second side plate assembly, and the third side plate assembly are fixedly connected to the left, right, and rear regions of the cabinet frame in sequence. The first side plate assembly, the second side plate assembly, and the third side plate assembly are each composed of 2 or 3 independent plate bodies. The first side plate assembly, the second side plate assembly, and the third side plate assembly are respectively fixedly connected to the cabinet frame from the outside to the inside by stainless steel bolts. An outer door with a protruding structure is openably connected to the outside of the front end of the cabinet frame. The outer door, the outer side plate, the bottom plate, and the rainproof eaves together form a closed structure on the cabinet frame. An inner door with an embedded structure is openably connected to the inside of the front end of the cabinet frame. The inner door is arranged inside the outer door, and electrical components are arranged on the door body of the inner door. An observation window assembly for observing the condition of the electrical components arranged on the inner door is arranged on the outer door. Ventilation windows are arranged on the lower plate bodies of the first side plate assembly and the second side plate assembly respectively. A plurality of ventilation holes communicating with the inside of the switchgear cabinet are evenly arranged at the bottom end of the rainproof eaves. The cabinet frame is respectively provided with snap-in flame-retardant sealing strips at the contact positions with the outer door, the outer side plate, the bottom plate, and the rainproof eaves.

[0008] In an optional solution of the present application, the material of the cabinet frame is carbon steel, and it is integrally welded to form a square frame support structure; the inner door is made of carbon steel, and the outer door, the bottom plate, the outer side plate, and the rainproof eaves are all made of stainless steel materials;

[0009] The outer door includes an outer left door and an outer right door that can be opened and closed independently. The outer left door and the outer right door are respectively openably connected to the left and right sides of the front end of the cabinet frame through metal hinges;

[0010] The inner door includes an inner upper left door, an inner upper right door, an inner lower left door, and an inner lower right door. The inner upper left door, the inner upper right door, the inner lower left door, and the inner lower right door are respectively installed and connected to the cabinet frame through metal hinges;

[0011] Both the first side plate assembly and the second side plate assembly are composed of three independent plate bodies distributed in sequence from top to bottom, middle, and bottom. Both the first side plate assembly and the second side plate assembly are provided with the ventilation windows on the independent plate bodies below them respectively. The third side plate assembly is composed of two independent plate bodies distributed from top to bottom.

[0012] In an alternative embodiment of the present application, the rainproof eaves are fixed to the top of the cabinet frame from bottom to top by bolts. The top surface of the rainproof eaves has an inclined plane that slopes forward and downward. The dimensions of the periphery of the rainproof eaves are larger than those of the cabinet frame to completely shield the area of the switchgear cabinet below the rainproof eaves.

[0013] In an alternative embodiment of the present application, water guide groove structures are provided at the contact positions between the cabinet frame and the outer door and between the cabinet frame and the outer side plate.

[0014] In an alternative embodiment of the present application, the outer left door and the cabinet frame are locked and connected by two stainless steel pin-type locks distributed vertically. A waterproof mechanical lock in the form of a lock rod is provided on the outer right door.

[0015] The observation window assembly is a double-layer sealed structure with an arc-shaped convex surface. The observation window assembly includes an observation window, a first sealing strip, and a second sealing strip. The observation window is a transparent window body with an arc-shaped convex outer surface. The observation window is made of high-strength heat-resistant glass. The radius of curvature of the observation window is between 1 / 3 and 1 / 2 of the overall width of the outer door.

[0016] The first sealing strip is an inner elastic sealing strip that closely adheres to the edge of the observation window and surrounds the entire periphery of the observation window. A groove is provided around the edge of the observation window. The first sealing strip is embedded in this groove to form an integrated sealing structure. After the first sealing strip is installed on the observation window, it is fixed to the window hole of the outer door by a buckle.

[0017] The second sealing strip is an outer rigid sealing strip that covers the first sealing strip. The second sealing strip fits closely with the window hole of the outer door. The second sealing strip can cover the joint part between the observation window and the outer door. The second sealing strip is fixedly connected to the edge of the window hole of the outer door by screws or rivets.

[0018] In an alternative embodiment of the present application, a cable inlet is provided at the lower end of the third side plate assembly in the rear area of the cabinet frame. An adjustable compression sealing device is provided around the cable inlet to fix the cable passing through the cable inlet and to seal the joint between the cable inlet and the cable.

[0019] The adjustable pressing and sealing device includes a refractory rubber seal, a pressing plate, and a plurality of adjusting bolts. The refractory rubber seal is an annular structure arranged around the cable and can be used to penetrate the cable. After the cable penetrates into the cable inlet, it is connected to the third side plate assembly through the pressing plate and the refractory rubber seal is pressed to achieve fixation and sealing. The pressing plate is a circular ring structure with the same opening size as the cable inlet. A plurality of bolt through holes are evenly arranged in the circumferential direction on the surface of the pressing plate. The adjusting bolts are arranged in the bolt through holes. A plurality of connection holes corresponding to the bolt through holes are evenly arranged on the third side plate assembly around the cable inlet. The pressing plate is connected to the third side plate assembly through the adjusting bolts. The pressing plate can change the distance between the pressing plate and the refractory rubber seal by rotating the adjusting bolts to cause different degrees of extrusion deformation, and the refractory rubber seal can fill the gaps around the cable when being extruded and deformed.

[0020] In an alternative embodiment of the present application, a concave diversion hole is provided on the bottom end surface of the rainproof eaves corresponding to the inner area at the top end of the cabinet frame. There are a plurality of ventilation holes, and the plurality of ventilation holes are evenly arranged in the circumferential direction on the bottom end surface of the rainproof eaves. The ventilation holes are designed with an L-shaped bend. One open end of the ventilation hole is vertically downward, and the other open end of the ventilation hole extends horizontally and is connected to the diversion hole. A flame-retardant protective net covers the open end of the ventilation hole on the outside. A fire damper is fixedly installed on the bottom end surface of the rainproof eaves. The fire damper is located in the diversion hole. The fire damper has an outer contour adapted to the hole shape of the diversion hole. The fire damper is equipped with a temperature sensing device, and the fire damper can automatically close when the temperature sensing device detects an abnormal high temperature.

[0021] In an alternative embodiment of the present application, the ventilation window is a fireproof louver, which is made of refractory material and can be closed during a fire.

[0022] In an alternative embodiment of the present application, the outer surface of the switch cabinet body is coated with an epoxy resin-based anti-corrosion coating, and a plurality of reinforcing ribs are provided at the bottom of the bottom plate. The reinforcing ribs are integrally formed with the bottom plate.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] 1. By adopting a front - facing one - way maintenance access structure, this application significantly reduces the number of openings, enhances the sealing performance and protection ability of the cabinet body. In case of fire or other extreme environments, this design can effectively reduce the intrusion of external high temperature, flames or moisture, improving the safety of internal electrical equipment. At the same time, this application adopts a double - layer door protection form inside and outside. An effective air heat - insulation layer is formed between the inner door and the outer door. This design not only enhances the fire - prevention performance of the switch cabinet, but also, in case of an accident, can extend the safe operation time of internal electrical equipment, winning precious time for emergency handling. Moreover, by designing the outer door with a protruding structure and the inner door with an embedded structure, not only the strength of the door body is increased, but also a natural buffer zone is formed between the door bodies, further improving the fire - prevention and heat - insulation effects.

[0025] 2. By using the cabinet body frame as the main load - bearing structure and fixing the rain - proof eaves and the bottom plate at the top and bottom of the frame respectively, a high - strength and stable overall structure is formed. This design not only improves the impact resistance of the cabinet body, but also ensures the stability and durability of the switch cabinet under various working conditions. In addition, the outer side plates of this application are designed as three groups of independent side - plate assemblies, and each is composed of several independent plate bodies, corresponding to the left, right and rear areas of the cabinet body frame respectively. This modular design is not only convenient for on - site installation and maintenance, but also when local damage occurs, only the damaged part needs to be replaced, reducing the maintenance cost.

[0026] 3. Multiple ventilation holes are provided at the bottom end of the rain - proof eaves of this application. They are connected to the inside of the cabinet body through evenly distributed ventilation holes, which can not only effectively prevent rainwater from entering the cabinet body, but also ensure the internal air circulation and avoid over - high temperature inside the cabinet. In addition, the size of the rain - proof eaves is larger than that of the cabinet body frame, which can completely cover the top of the cabinet body, further enhancing the overall protection effect. In addition, at the contact points between the cabinet body frame and the outer door, outer side plates, bottom plate and rain - proof eaves of this application, snap - type flame - retardant sealing strips are provided. This kind of sealing strip not only has good flame - retardant performance, but also can be firmly fixed through the snap - type structure, preventing loosening or falling off after high temperature or long - term use, so as to ensure that all joints of the cabinet body are always in a good sealing state, further enhancing the protection ability of the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings below are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 FIG. 1 is a front - view structural schematic diagram of a highly protective switch cabinet facilitating installation and maintenance provided by an embodiment of this application;

[0029] Figure 2 Schematic diagram of the rear side of a highly protective switch cabinet facilitating installation and maintenance provided by an embodiment of the present application;

[0030] Figure 3 Schematic diagram of the left side of a highly protective switch cabinet facilitating installation and maintenance provided by an embodiment of the present application;

[0031] Figure 4 Schematic diagram of the right side of a highly protective switch cabinet facilitating installation and maintenance provided by an embodiment of the present application;

[0032] Figure 5 Schematic diagram of a highly protective switch cabinet facilitating installation and maintenance provided by an embodiment of the present application after removing the outer door;

[0033] Figure 6 Schematic diagram of the outer left door provided by an embodiment of the present application;

[0034] Figure 7 Schematic diagram of the outer right door provided by an embodiment of the present application;

[0035] Figure 8 Schematic diagram of the observation window assembly on the outer door provided by an embodiment of the present application;

[0036] Figure 9 Schematic diagram of the structure of the pressing and sealing device provided by an embodiment of the present application;

[0037] Figure 10 Schematic diagram of the structure of the rainproof eaves provided by an embodiment of the present application.

[0038] Reference numerals:

[0039] 1. Cabinet frame; 2. Outer door; 201. Outer left door; 202. Outer right door; 3. Inner door; 301. Inner upper left door; 302. Inner upper right door; 303. Inner lower left door; 304. Inner lower right door; 4. Outer side plate; 401. First side plate assembly; 402. Second side plate assembly; 403. Third side plate assembly; 4031. Connection hole; 5. Bottom plate; 6. Rainproof eaves; 601. Diversion hole; 602. Fire damper; 6021. Temperature sensing device; 7. Observation window assembly; 701. Observation window; 702. First sealing strip; 703. Second sealing strip; 8. Ventilation window; 9. Ventilation hole; 901. Flame retardant protection net; 10. Metal hinge; 11. Metal hinge; 12. Stainless steel snap lock; 13. Cable inlet; 14. Waterproof mechanical lock; 15. Pressing and sealing device; 1501. Fire-resistant rubber seal; 1502. Pressing plate; 15021. Bolt through hole; 1503. Adjusting bolt. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following clearly and completely describes the technical solutions in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts also belong to the scope of protection of this application.

[0041] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0042] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise stated, the meaning of "plural" is two or more.

[0043] In the description of this application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] Figure 1 The front view structural schematic diagram of a highly protective switch cabinet that is convenient for installation and maintenance provided by an embodiment of this application; Figure 2 The rear view schematic diagram of a highly protective switch cabinet that is convenient for installation and maintenance provided by an embodiment of this application; Figure 3 The left side view schematic diagram of a highly protective switch cabinet that is convenient for installation and maintenance provided by an embodiment of this application; Figure 4 The right side view schematic diagram of a highly protective switch cabinet that is convenient for installation and maintenance provided by an embodiment of this application; Figure 5 The schematic diagram of a highly protective switch cabinet that is convenient for installation and maintenance provided by an embodiment of this application after removing the outer door; Figure 6 The schematic diagram of the outer left door provided by an embodiment of this application, where Figure 6 a is the front view schematic diagram of the outer left door, Figure 6 b is the back view schematic diagram of the outer left door; Figure 7Schematic diagram of the outer right door provided by an embodiment of the present application, where Figure 7 a in is the front schematic diagram of the outer right door, Figure 7 b in is the dorsal schematic diagram of the outer right door; Figure 8 Schematic diagram of the observation window assembly on the outer door provided by an embodiment of the present application; Figure 9 Schematic diagram of the structure of the pressing and sealing device provided by an embodiment of the present application; Figure 10 Schematic diagram of the structure of the rainproof eaves provided by an embodiment of the present application.

[0045] As Figures 1-7 shown, the highly protective switchgear cabinet provided by the embodiment of the present application for easy installation and maintenance includes a switchgear cabinet body. The switchgear cabinet body adopts a front single-sided maintenance channel structure. The front structure of the switchgear cabinet body is a double-layer door body protection form inside and outside. The switchgear cabinet body includes a cabinet frame 1, an outer door 2, an inner door 3, an outer side plate 4, a bottom plate 5, a rainproof eaves 6, and an observation window assembly 7.

[0046] Among them, the cabinet frame 1 is the main load-bearing structure of the switchgear cabinet body. A rainproof eaves 6 is fixedly connected to the top end of the cabinet frame 1, and a bottom plate 5 is fixedly connected to the bottom end of the cabinet frame 1. The outer side plate 4 is composed of a first side plate assembly 401, a second side plate assembly 402, and a third side plate assembly 403 corresponding to the left, right, and rear regions of the cabinet frame 1 respectively. The first side plate assembly 401, the second side plate assembly 402, and the third side plate assembly 403 are fixedly connected to the left, right, and rear regions of the cabinet frame 1 in sequence. The first side plate assembly 401, the second side plate assembly 402, and the third side plate assembly 403 are each composed of 2 or 3 independent plate bodies. The first side plate assembly 401, the second side plate assembly 402, and the third side plate assembly 403 are respectively fixedly connected to the cabinet frame 1 by stainless steel bolts from the outside to the inside. An outward-opening outer door 2 is connected to the outside of the front end of the cabinet frame 1 in a switchable manner. The outer door 2, the outer side plate 4, the bottom plate 5, and the rainproof eaves 6 together form a closed structure on the cabinet frame 1. An embedded inner door 3 is connected to the inside of the front end of the cabinet frame 1 in a switchable manner. The inner door 3 adopts an embedded design, which can save space and enhance aesthetics. The inner door 3 is arranged inside the outer door 2, and electrical components are arranged on the door body of the inner door 3. An observation window assembly 7 for observing the condition of the electrical components arranged on the inner door 3 is arranged on the outer door 2. Ventilation windows 8 are arranged on the lower plate bodies of the first side plate assembly 401 and the second side plate assembly 402 respectively. A plurality of ventilation holes 9 communicating with the inside of the switchgear cabinet body are evenly opened at the bottom end of the rainproof eaves 6. The cooperation of the ventilation windows 8 and the ventilation holes 9 ensures the air flow inside the cabinet body, prevents moisture accumulation, and thus maintains a reasonable temperature and humidity. The cabinet frame 1 is respectively provided with snap-fastening flame-retardant sealing strips at the contact positions with the outer door 2, the outer side plate 4, the bottom plate 5, and the rainproof eaves 6 to ensure the sealing performance and prevent water vapor from entering.

[0047] Traditional switchgear cabinets usually adopt a multi-directional maintenance access structure. Although this increases the convenience of maintenance, it also increases the number of external openings of the switchgear cabinet, reducing the overall sealing performance and protection ability. The highly protective switchgear cabinet provided by the embodiments of the present application, by adopting a front single-direction maintenance access structure, significantly reduces the number of openings, enhances the sealing performance and protection ability of the cabinet body. In case of a fire or other extreme environments, this design can effectively reduce the intrusion of external high temperature, flames or moisture, improving the safety of internal electrical equipment.

[0048] At the same time, most of the switchgear cabinets in the prior art use a single-layer door structure, which is difficult to provide sufficient heat insulation protection in case of a fire or extreme high temperature conditions. In the embodiments of the present application, a double-layer door protection form of inner and outer doors is adopted. An effective air heat insulation layer is formed between the inner door 3 and the outer door 2. This design not only enhances the fire protection performance of the switchgear cabinet, but also, in case of an accident, can extend the safe operation time of internal electrical equipment, winning precious time for emergency handling.

[0049] Moreover, in the embodiments of the present application, by designing the outer door 2 with a protruding structure and the inner door 3 with an embedded structure, not only the strength of the door body is increased, but also a natural buffer zone is formed between the door bodies, further improving the fire protection and heat insulation effects.

[0050] Furthermore, in the embodiments of the present application, the cabinet body frame 1 is used as the main load-bearing structure, and the rain-proof eaves 6 and the bottom plate 5 are respectively fixed at the top and bottom of the frame, forming a high-strength and stable overall structure. This design not only improves the impact resistance of the cabinet body, but also ensures the stability and durability of the switchgear cabinet under various working conditions. In addition, in the prior art, an integral outer side plate is often used. Once damaged or deformed, it is difficult to replace it locally. The outer side plate 4 of the embodiments of the present application is designed as three groups of independent side plate components, and each is composed of several independent plate bodies, corresponding to the left, right and rear regions of the cabinet body frame 1 respectively. This modular design is not only convenient for on-site installation and maintenance, but also enables only the damaged part to be replaced in case of local damage, reducing the maintenance cost. In addition, the use of stainless steel bolts further improves the firmness and corrosion resistance of the connection, enhancing the overall service life of the switchgear cabinet.

[0051] Furthermore, a plurality of ventilation holes 9 are provided at the bottom end of the rain-proof eaves 6 of the present application. The evenly distributed ventilation holes 9 are communicated with the inside of the cabinet body. It can not only effectively prevent rainwater from entering the cabinet body, but also ensure the internal air circulation and avoid the temperature in the cabinet being too high. In addition, the size of the rain-proof eaves 6 is larger than that of the cabinet body frame, which can completely cover the top of the cabinet body, further enhancing the overall protection effect.

[0052] In addition, in the embodiments of the present application, snap-fastened flame-retardant sealing strips are provided at the contact points between the cabinet frame 1 and the outer door 2, the outer side plate 4, the bottom plate 5, and the rainproof eaves 6. Such sealing strips not only have good flame-retardant performance but also can be firmly fixed through the snap-fastening structure, preventing loosening or detachment after high temperature or long-term use, thereby ensuring that all joints of the cabinet are always in a good sealed state and further enhancing the protection ability of the switch cabinet.

[0053] In some embodiments, the material of the cabinet frame 1 is carbon steel, which is integrally welded to form a square frame support structure, having relatively high strength and load-bearing capacity; the inner door 3 is made of carbon steel, and the outer door 2, the bottom plate 5, the outer side plate 4, and the rainproof eaves 6 are all made of stainless steel. In this embodiment, by reasonably allocating the use of the two materials, carbon steel and stainless steel, the balance between corrosion resistance and cost-effectiveness can be achieved while maintaining the high strength of the equipment. The cabinet frame 1 made of carbon steel is used for the main load-bearing structure part, while stainless steel is used for the key protection and parts exposed to the environment. The carbon steel cabinet frame 1 provides a solid support structure, and the integral welding molding increases the structural stability and reduces the risk of loosening. The inner door 3 made of carbon steel can provide better strength and fire resistance, while the outer door 2 and other external components made of stainless steel significantly improve the corrosion resistance and environmental adaptability.

[0054] The outer door 2 includes an outer left door 201 and an outer right door 202 that can be opened and closed independently. The outer left door 201 and the outer right door 202 are respectively connected to the left and right sides of the front end of the cabinet frame 1 through metal hinges 10 in an openable and closable manner.

[0055] The inner door 3 includes an inner upper left door 301, an inner upper right door 302, an inner lower left door 303, and an inner lower right door 304. The inner upper left door 301, the inner upper right door 302, the inner lower left door 303, and the inner lower right door 304 are respectively installed and connected to the cabinet frame 1 through metal hinges 11.

[0056] The door bodies of the embodiments of the present application adopt a double-layer structure, and the outer door 2 is designed as an outer left door 201 and an outer right door 202 that can be opened and closed independently, and the inner door 3 is designed as an inner upper left door 301, an inner upper right door 302, etc., further enhancing the protection ability and facilitating maintenance and inspection. The combined use of such multiple materials and the design of the multi-door body structure reflect the high attention paid to protection and practicality. In the embodiments of the present application, the combination of carbon steel and stainless steel materials is not a simple superposition, and their distribution in different parts is well-considered to meet the functional requirements of different parts. The design of this multi-layer structure effectively avoids the problems brought by material singularity and improves the overall performance of the switch cabinet.

[0057] Both the first side plate assembly 401 and the second side plate assembly 402 are composed of three independent plates arranged in sequence from top to bottom, middle, and bottom. Ventilation windows 8 are provided on the independent plates below each of the first side plate assembly 401 and the second side plate assembly 402. The third side plate assembly 403 is composed of two independent plates distributed from top to bottom.

[0058] When designing the switch cabinet of this application embodiment, it is selected to set the left and right sides and the rear side outside as three groups of independent side plate assemblies, and all are composed of several independent plates. The main reasons are as follows:

[0059] 1. Facilitate installation and maintenance: The design of multiple side plate assemblies and the design that each side plate assembly is composed of several independent plates enable each side plate assembly and each independent plate of the side plate assembly to be disassembled or replaced separately. If the equipment inside the switch cabinet needs to be repaired or upgraded, only the plates at the relevant positions need to be disassembled, without having to damage the entire shell. This modular design improves the convenience and efficiency of maintenance.

[0060] 2. Enhance stress distribution and structural stability: Designing the shell as multiple side plate assemblies can better disperse and bear external mechanical stresses. Each side plate assembly is fixed to the cabinet frame through a reasonable connection method. When a collision or external pressure occurs, different positions of the side plate can independently bear the action of force, reducing the risk of deformation of the entire structure.

[0061] 3. Improve the treatment of thermal expansion and contraction: Metal materials will undergo thermal expansion and contraction when the temperature changes. The integrally welded shell is prone to generating large internal stresses due to large-area temperature differences, which may further cause material deformation or damage to the welded parts. Multiple side plate assemblies can absorb these deformations through their respective gaps and connection methods, reducing the impact of thermal stress on the structure.

[0062] 4. Facilitate manufacturing and transportation: During the manufacturing process, multiple side plate assemblies can be produced and processed separately, reducing the difficulty and cost of single-piece processing. In addition, during transportation, dividing the cabinet body into multiple side plate assemblies can reduce the volume, facilitating transportation and assembly.

[0063] 5. Improve the protection performance: By dividing the shell into multiple side plates and adopting a sealing design, sealing strips can be added at the connection parts of each side plate, thereby enhancing the overall waterproof, dustproof, and fireproof performance. This design can further improve the protection ability of the cabinet body in case of an accident (such as a fire).

[0064] In summary, the design of multiple side plate assemblies not only has advantages in terms of installation, maintenance, stress distribution, etc., but also can improve the protection performance of the cabinet body and adapt to different usage environments and requirements.

[0065] In some embodiments, the rainproof eaves 6 are fixed to the top end of the cabinet frame 1 from bottom to top by bolts. The top surface of the rainproof eaves 6 has an inclined surface that slopes forward and downward, such that the top surface of the rainproof eaves 6 has a certain inclination angle, thereby facilitating rainwater drainage. Optionally, the inclination angle between this inclined surface and the horizontal plane is 6°. The dimensions of the perimeter of the rainproof eaves 6 are larger than those of the cabinet frame 1 to fully shield the area of the switchgear cabinet below the rainproof eaves 6.

[0066] The design of the rainproof eaves of traditional switchgear cabinets is relatively simple, usually a flat structure, and the ventilation holes are directly opened on the side plates or bottom plates. In the case of rain or water accumulation, rainwater easily enters the interior of the cabinet through the ventilation holes, causing damage to the equipment. In the embodiments of the present application, the rainproof eaves 6 are designed as a structure with an inclined surface, and the dimensions are larger than those of the cabinet frame, which can fully shield the main part of the switchgear cabinet and prevent rainwater from directly dripping onto the cabinet part below the rainproof eaves 6.

[0067] In some embodiments, water guide groove structures are provided at the contact positions between the cabinet frame 1 and the outer door 2 and between the cabinet frame 1 and the outer side plate 4. The water guide groove structures are provided at the contact positions between the cabinet frame 1 and the outer door 2 and the outer side plate 4, which can effectively drain rainwater or other liquids to the outside of the cabinet, prevent the liquid from entering the interior of the cabinet, and thus protect the internal electrical equipment. This design effectively enhances the waterproof performance of the switchgear cabinet.

[0068] In some embodiments, the outer left door 201 and the cabinet frame 1 are locked and connected by two stainless steel pin-type locks 12 distributed vertically. The two stainless steel pin-type locks 12 can be designed to be installed on the back of the outer left door 201. A waterproof mechanical lock 14 in the form of a lock rod is provided on the outer right door 202. The waterproof mechanical lock 14 can be installed on the front side of the outer right door 202, thus facing external personnel. The use of the stainless steel pin-type locks 12 on the outer left door 201 provides a stronger mechanical locking force, while the waterproof mechanical lock 14 on the outer right door 202 further improves the protection performance. Especially in a humid or rainy environment, it can effectively prevent moisture from entering the interior of the cabinet. The design of these locking devices significantly enhances the stability and safety of the switchgear cabinet door body, ensuring the long-term reliability of the electrical components inside the cabinet in a harsh environment.

[0069] In some embodiments, such as Figure 8As shown, the observation window assembly 7 is a double-layer sealed structure with an arc-shaped convex surface. The observation window assembly 7 includes an observation window 701, a first sealing strip 702, and a second sealing strip 703. The observation window 701 is a transparent window body with an arc-shaped convex outer surface. The observation window 701 is made of high-strength heat-resistant glass. The high-strength heat-resistant glass used can be selected from borosilicate glass. Borosilicate glass is a glass material that is heat-resistant and chemically corrosion-resistant. It can withstand high temperatures above 500°C, and its melting point is even as high as above 800°C, which makes it not deform or break in a high-temperature environment. Moreover, its coefficient of thermal expansion is only 3.3×10 -6 / K, far lower than that of ordinary glass, which means that when the temperature changes rapidly, the thermal stress of this glass is small and it is not easy to break. At the same time, it can resist the erosion of most chemical substances, including acids, alkalis, and organic solvents, and is very suitable for use in harsh environments. The radius of curvature of the observation window 701 is between 1 / 3 and 1 / 2 of the overall width of the outer door 2. Using an appropriate radius of curvature for the observation window 701 can make the field of vision wider and flatter, providing a better observation effect. Moreover, the appropriate arc design can also effectively disperse the pressure and reduce stress concentration, thereby improving the overall structural strength of the observation window and increasing its practicality. Optionally, there are a total of four observation windows 701, with two symmetrically arranged on the left and right above the outer door 2, and two symmetrically arranged on the left and right below the outer door 2.

[0070] The first sealing strip 702 is an inner-layer elastic sealing strip that closely adheres to the edge of the observation window 701 and surrounds the entire periphery of the observation window 701. A groove is provided on the edge of the observation window 701, and the first sealing strip 702 is embedded in this groove to form an integrated sealing structure. After the first sealing strip 702 is installed on the observation window 701, it is fixed at the window hole of the outer door 2 by a buckle. Optionally, in this embodiment, the first sealing strip 702 is made of ethylene propylene diene monomer (EPDM). Ethylene propylene diene monomer, with its excellent weather resistance, high and low temperature resistance, good chemical resistance, and excellent elasticity, is an ideal material choice for the first sealing strip 702 in this application, which can ensure long-term sealing effect and improve the protection performance.

[0071] The second sealing strip 703 is an outer-layer rigid sealing strip covering the first sealing strip 702. The second sealing strip 703 closely cooperates with the window hole of the outer door 2, and the second sealing strip 703 can cover the joint part between the observation window 701 and the outer door 2. The second sealing strip 703 is fixedly connected to the edge of the window hole of the outer door 2 by screws or rivets. Optionally, the material of the second sealing strip 703 can be selected as polytetrafluoroethylene (PTFE), and this material can provide a long-term sealing function in a harsh environment.

[0072] Existing observation windows are usually designed as flat surfaces, with poor sealing effects and are vulnerable to external environmental influences, such as temperature changes, intrusion of humid gases, etc. This may cause cracks, air leakage in the observation window or affect the perspective effect. In this embodiment, the observation window assembly 7 adopts a double-layer sealing design. The outer side of the observation window 701 is an arc convex surface structure. This design not only enhances the strength of the observation window 701, making it less likely to break under high temperature and physical impact, but also ensures airtightness through the double-layer sealing structure. The combined design of the first sealing strip 702 and the second sealing strip 703 effectively prevents the entry of external flames, smoke and moisture, significantly improving the protection ability of the switch cabinet under extreme conditions. The double-layer sealed observation window design with an arc convex surface is carefully designed based on considerations of mechanical properties, heat conduction barrier and airtightness. Such a design concept surpasses the traditional single-layer glass observation window structure, solving both the protection problem and retaining the functionality of the observation window, reflecting a high degree of innovation.

[0073] In some embodiments, as Figure 2 shown, a cable inlet 13 is provided at the lower end of the third side plate assembly 403 in the rear area of the cabinet frame 1 for the cable to penetrate into the cabinet interior, as Figure 9 shown, an adjustable compression sealing device 15 is provided around the cable inlet 13 and the cable passing through the cable inlet 13 is fixed through the adjustable compression sealing device 15 and the sealing of the joint between the cable inlet 13 and the cable can be achieved.

[0074] Among them, the adjustable pressing and sealing device 15 includes a refractory rubber seal 1501, a pressing plate 1502, and a plurality of adjusting bolts 1503. The refractory rubber seal 1501 is an annular structure arranged around the cable and can be used to penetrate the cable. After the cable penetrates into the cable inlet 13, it is connected to the third side plate assembly 403 through the pressing plate 1502 and fixed and sealed after pressing the refractory rubber seal 1501. The pressing plate 1502 is a circular ring structure with the same opening size as the cable inlet 13. A plurality of bolt through holes 15021 are evenly arranged in the circumferential direction on the surface of the pressing plate 1502. The adjusting bolts 1503 are arranged in the bolt through holes 15021. A plurality of connection holes 4031 corresponding to the bolt through holes 15021 are evenly arranged on the third side plate assembly 403 around the cable inlet 13. The pressing plate 1502 is connected to the third side plate assembly 403 through the adjusting bolts 1503. The pressing plate 1502 can change the distance between the pressing plate 1502 and the refractory rubber seal 1501 by rotating the adjusting bolts 1503 to cause different degrees of extrusion deformation, and the refractory rubber seal 1501 can fill the gaps around the cable when being extruded and deformed. Optionally, the material of the refractory rubber seal 1501 is fluorosilicone rubber (FVMQ). Fluorosilicone rubber not only has good high temperature resistance and fire resistance, but also has good elasticity and low compression deformation ability. Even after long-term compression, it can maintain good sealing performance, which is crucial for the sealing device of the cable inlet. Moreover, fluorosilicone rubber also has excellent aging resistance, can maintain the sealing function for a long time, and is not easily affected by environmental factors such as ultraviolet rays and oxidation.

[0075] In the prior art, the sealing of cables usually relies on a single sealing strip or filler, and it is difficult to adjust according to actual needs. Once the sealing strip ages or is damaged, the sealing effect will be significantly reduced, easily leading to water ingress and dust ingress at the cable interface, affecting the internal environment of the switch cabinet.

[0076] In this embodiment, an adjustable pressing and sealing device 15 is adopted. By adjusting the bolt 1503, the distance between the pressing plate 1502 and the refractory rubber seal 1501 can be flexibly adjusted to ensure the sealing effect at the cable joint. Even if the seal ages or undergoes compression deformation, its sealing performance can be restored to the greatest extent through adjustment, extending the service life of the switchgear cabinet. In this embodiment, the adjustable pressing and sealing device 15 combines mechanical adjustment and sealing technology. By controlling the pressing force, the reliability and durability of the seal are significantly improved. This design is not simply an improvement in the sealing material, but through the application of an adjustment mechanism, the dynamic adjustment of the sealing performance is achieved, with high innovation and application value. The combined design of the refractory rubber seal 1501 and the pressing plate 1502 enables the fixation and sealing of cables of different sizes through simple bolt adjustment, which cannot be easily achieved by traditional single-sealing material designs. This design provides higher safety and reliability for the switchgear cabinet in extreme environments such as fires.

[0077] In some embodiments, such as Figure 10 shown, on the bottom end face of the rainproof eaves 6, a concave diversion hole 601 is provided corresponding to the inner area at the top of the cabinet frame 1. There are multiple ventilation holes 9, and the multiple ventilation holes 9 are circumferentially and evenly arranged on the bottom end face of the rainproof eaves 6. While maintaining ventilation, it can prevent rainwater from easily entering. The ventilation hole 9 is designed in an L-shaped bend. One open end of the ventilation hole 9 is vertically downward, and the other open end of the ventilation hole 9 extends horizontally and is connected to the diversion hole 601. The open end of the ventilation hole 9 on the outer side is covered with a flame-retardant protective net 901. A fire damper 602 is fixedly installed on the bottom end face of the rainproof eaves 6. The fire damper 602 is located within the diversion hole 601. The fire damper 602 has an outer contour adapted to the hole shape of the diversion hole 601. A temperature sensing device 6021 is equipped on the fire damper 602. The fire damper 602 can automatically close when the temperature sensing device 6021 detects an abnormal high temperature. Optionally, the inner surface of the L-shaped ventilation hole 9 is coated with a fireproof coating to enhance the fireproof performance of the ventilation hole. The fire damper 602 can be an electric fire damper.

[0078] When designing ventilation holes for the rainproof eaves of traditional switchgear cabinets, there is often a lack of effective diversion of rainwater. The structure of the ventilation holes is simple and easily blocked by debris or water vapor in the external environment, thereby affecting the ventilation effect of the switchgear cabinet and possibly causing overheating or moisture absorption of the internal equipment. The L-shaped bend design of the ventilation hole 9 and the configuration of the fire damper 602 effectively solve the contradiction between ventilation and protection. The L-shaped bend design prevents rainwater from directly entering the cabinet body. At the same time, the fire damper 602 can automatically close when the temperature is abnormal, further improving the fire safety of the switchgear cabinet. These designs together ensure that the internal environment of the cabinet body is controlled in the best state, enhancing the stability and service life of the equipment.

[0079] In the event of a fire, the ventilation holes of traditional switch cabinets cannot block the entry of flames and high-temperature gases, posing a significant safety hazard. Therefore, in this embodiment, the ventilation hole 9 adopts an L-shaped bending design, and a flame-retardant protective net 901 is covered at the open end. Combined with the application of the fire damper 602, it is ensured that when an abnormal high temperature is detected, it automatically closes to prevent flames and high-temperature gases from entering the cabinet interior, thereby improving the overall safety of the switch cabinet.

[0080] The design of the L-shaped ventilation hole 9 in the embodiment of this application not only considers the daily ventilation requirements but also provides a protective function under extreme conditions such as fires. Through a reasonable structural design, it successfully solves the protection defects of traditional ventilation holes. Combined with the application of the fire damper 602, it realizes an automated safety protection measure. This innovative design significantly improves the safety performance of the switch cabinet.

[0081] In some embodiments, the ventilation window 8 is a fireproof louver, which is made of fire-resistant materials and can be closed during a fire. By adopting such a ventilation window 8 in this embodiment, it can automatically close during a fire, effectively blocking the entry of flames and smoke. This design significantly improves the fire safety while ensuring the normal heat dissipation of the electrical equipment inside the cabinet.

[0082] In some embodiments, the outer surface of the switch cabinet body is coated with an epoxy resin-based anti-corrosion coating, and multiple reinforcing ribs are provided at the bottom of the bottom plate 5. The reinforcing ribs are integrally formed with the bottom plate 5 to improve the load-bearing capacity and overall stability of the cabinet body. In this embodiment, the outer surface coating of the switch cabinet body uses an epoxy resin-based anti-corrosion coating, which has excellent corrosion resistance and weather resistance and can protect the cabinet body from the erosion of the external environment for a long time. The design of multiple reinforcing ribs provided on the bottom plate 5 provides additional structural support and effectively prevents the bottom plate 5 from deforming or cracking due to load during long-term use. These designs ensure the long-term stability and reliability of the switch cabinet.

[0083] In summary, it can be seen that the switch cabinet in the embodiment of this application has excellent fire protection performance and structural strength, can protect the internal electrical equipment under fires and external impacts, and can be widely applied to occasions with high safety requirements in the power system, with strong practicability and market competitiveness.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high-protection switch cabinet that is easy to install and maintain, comprising a switch cabinet body, characterized in that: The switch cabinet body adopts a front one-way maintenance channel structure, the front structure of the switch cabinet body is an inner and outer double-layer door body protection form, and the switch cabinet body comprises a cabinet frame (1), an outer door (2), an inner door (3), an outer side plate (4), a bottom plate (5), a rainproof visor (6) and an observation window assembly (7); The cabinet frame (1) is the main load-bearing structure of the switch cabinet, the top end of the cabinet frame (1) is fixedly connected to the rainproof visor (6), the bottom end of the cabinet frame (1) is fixedly connected to the bottom plate (5), the outer side plate (4) is composed of a first side plate assembly (401), a second side plate assembly (402) and a third side plate assembly (403) corresponding to the left side, right side and rear side areas of the cabinet frame (1), respectively, and the left side, right side and rear side areas of the cabinet frame (1) are fixedly connected in sequence. The first side panel assembly (401), the second side panel assembly (402) and the third side panel assembly (403), the first side panel assembly (401), the second side panel assembly (402) and the third side panel assembly (403) are each composed of two or three independent panels, the first side panel assembly (401), the second side panel assembly (402) and the third side panel assembly (403) are respectively fixedly connected to the cabinet frame (1) from the outside to the inside by stainless steel bolts, and the cabinet frame The front end of the cabinet frame (1) is connected to the outer side of the cabinet frame (1) in an openable and closable manner with the outer door (2) of the protruding structure, the outer door (2), the outer side plate (4), the bottom plate (5) and the rainproof visor (6) together form a closed structure on the cabinet frame (1), the front end of the cabinet frame (1) is connected to the inner side of the cabinet frame (1) in an openable and closable manner with the inner door (3) of the embedded structure, the inner door (3) is arranged on the inner side of the outer door (2) and the door body of the inner door (3) is provided with electrical components, and the outer door (2) is provided with a device for observing the inner door. The door (3) is provided with an observation window assembly (7) for observing the status of electrical components; the first side panel assembly (401) and the second side panel assembly (402) are provided with ventilation windows (8) on their respective lower panels; the bottom end of the rainproof visor (6) is evenly provided with a plurality of ventilation holes (9) connected to the interior of the switch cabinet; the cabinet frame (1) is provided with snap-on flame-retardant sealing strips at the contact points with the outer door (2), the outer side panel (4), the bottom plate (5) and the rainproof visor (6).

2. The high-protection switch cabinet that is easy to install and maintain as claimed in claim 1 is characterized in that: The cabinet frame (1) is made of carbon steel and is integrally welded to form a square frame support structure; the inner door (3) is made of carbon steel, and the outer door (2), the bottom plate (5), the outer side plate (4) and the rainproof visor (6) are all made of stainless steel; The outer door (2) comprises an outer left door (201) and an outer right door (202) which can be opened and closed independently, and the outer left door (201) and the outer right door (202) are respectively connected to the left and right sides of the front end of the cabinet frame (1) through metal hinges (10) so as to be openable and closable; The inner door (3) comprises an inner left upper door (301), an inner right upper door (302), an inner left lower door (303) and an inner right lower door (304); the inner left upper door (301), the inner right upper door (302), the inner left lower door (303) and the inner right lower door (304) are respectively installed and connected to the cabinet frame (1) via metal hinges (11); The first side panel assembly (401) and the second side panel assembly (402) are both composed of three independent panels which are sequentially distributed in the upper, middle and lower parts. The first side panel assembly (401) and the second side panel assembly (402) are both provided with the ventilation windows (8) on the independent panels below them. The third side panel assembly (403) is composed of two independent panels which are sequentially distributed in the upper and lower parts.

3. The high-protection switch cabinet that is easy to install and maintain as claimed in claim 1 or 2, characterized in that: The rainproof brim (6) is fixed to the top of the cabinet frame (1) from bottom to top by bolts, the top surface of the rainproof brim (6) has an inclined surface inclined forward and downward, and the surrounding dimensions of the rainproof brim (6) are larger than the dimensions of the cabinet frame (1) so as to completely cover the area of ​​the switch cabinet below the rainproof brim (6).

4. The high-protection switch cabinet that is easy to install and maintain as claimed in claim 1 is characterized in that: A water guide groove structure is provided at the contact point between the cabinet frame (1) and the outer door (2) and at the contact point between the cabinet frame (1) and the outer side panel (4).

5. The high-protection switch cabinet that is easy to install and maintain as claimed in claim 2 is characterized in that: The outer left door (201) is locked and connected to the cabinet frame (1) by means of two stainless steel bayonet lock buckles (12) distributed up and down, and the outer right door (202) is provided with a waterproof mechanical lock (14) that is locked in the form of a locking rod.

6. The high-protection switch cabinet that is easy to install and maintain as claimed in claim 3 is characterized in that: The observation window assembly (7) is a double-layer sealing structure with an arc-shaped convex surface, and the observation window assembly (7) comprises an observation window (701), a first sealing strip (702) and a second sealing strip (703); the observation window (701) is a transparent window body with an outer side surface in the form of an arc-shaped convex surface, the observation window (701) is made of high-strength and high-temperature resistant glass, and the curvature radius of the observation window (701) is between 1 / 3 and 1 / 2 of the overall width of the outer door (2); The first sealing strip (702) is an inner elastic sealing strip which is tightly attached to the edge of the observation window (701) and surrounds the entire periphery of the observation window (701); a circle of grooves is provided at the edge of the observation window (701), and the first sealing strip (702) is embedded in the groove to form an integrated sealing structure; after the first sealing strip (702) is installed, the observation window (701) is fixed to the window hole of the outer door (2) by means of a buckle; The second sealing strip (703) is an outer rigid sealing strip covering the first sealing strip (702); the second sealing strip (703) is tightly matched with the window hole of the outer door (2); the second sealing strip (703) can cover the joint between the observation window (701) and the outer door (2); the second sealing strip (703) is fixedly connected to the edge of the window hole of the outer door (2) by screws or rivets.

7. The high-protection switch cabinet that is easy to install and maintain as claimed in claim 6 is characterized in that: A cable inlet (13) is provided at the lower end of the third side panel assembly (403) in the rear area of ​​the cabinet frame (1), and an adjustable compression sealing device (15) is provided around the cable inlet (13). The adjustable compression sealing device (15) is used to fix the cable passing through the cable inlet (13) and to seal the joint between the cable inlet (13) and the cable; The adjustable compression sealing device (15) comprises a fire-resistant rubber seal (1501), a compression plate (1502) and a plurality of adjusting bolts (1503); the fire-resistant rubber seal (1501) is an annular structure arranged around the cable and can be used to insert the cable; after the cable is inserted into the cable inlet (13), it is connected to the third side plate assembly (403) through the compression plate (1502) and the fire-resistant rubber seal (1501) is compressed to achieve fixation and sealing; the compression plate (1502) is an annular structure with an opening size consistent with that of the cable inlet (13); a plurality of bolt through holes (15021) are evenly opened in an annular direction on the surface of the compression plate (1502); the bolt through holes (15021) are uniformly opened in ... The adjusting bolt (1503) is arranged in the bolt through hole (15021); a plurality of connecting holes (4031) corresponding to the bolt through hole (15021) are evenly opened on the third side plate assembly (403) at the periphery of the cable inlet (13); the clamping plate (1502) is connected to the third side plate assembly (403) via the adjusting bolt (1503); the clamping plate (1502) can change the distance between the clamping plate (1502) and the fire-resistant rubber seal (1501) by rotating the adjusting bolt (1503) so as to cause different degrees of extrusion deformation; and the fire-resistant rubber seal (1501) can fill the gap around the cable when being extruded and deformed.

8. The high-protection switch cabinet that is easy to install and maintain as claimed in claim 6 or 7, characterized in that: The bottom surface of the rainproof hat brim (6) is provided with a concave guide hole (601) corresponding to the inner area of ​​the top of the cabinet frame (1), and the ventilation holes (9) are multiple, and the multiple ventilation holes (9) are evenly arranged in a circumferential direction on the bottom surface of the rainproof hat brim (6). The ventilation holes (9) are L-shaped curved design, one of the opening ends of the ventilation holes (9) is vertically downward, and the other opening end of the ventilation hole (9) extends horizontally and is connected to the guide hole (601), and the ventilation holes (9) are located outside. The open end of the side is covered with a flame retardant protective net (901), and a fire damper (602) is fixedly installed on the bottom end surface of the rainproof hat brim (6), and the fire damper (602) is located in the guide hole (601). The fire damper (602) has an outer contour that is adapted to the hole shape of the guide hole (601), and the fire damper (602) is provided with a temperature sensing device (6021). The fire damper (602) can close automatically when the temperature sensing device (6021) detects abnormally high temperature.

9. The high-protection switch cabinet that is easy to install and maintain as claimed in claim 8 is characterized in that: The ventilation window (8) is a fireproof shutter, which is made of fire-resistant material and can be closed in case of fire.

10. The high-protection switch cabinet that is easy to install and maintain as claimed in any one of claims 4 to 7, characterized in that: The outer surface of the switch cabinet body is coated with an epoxy resin-based anti-corrosion coating, and a plurality of reinforcing ribs are provided at the bottom of the base plate (5), and the reinforcing ribs are integrally formed with the base plate (5).

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