A low-voltage cabinet shell with high protection strength

Abstract

The utility model discloses a low -voltage cabinet shell of high protection intensity, it includes main frame, built -in guard board, external reinforcing rib subassembly, anti -impact buffer layer, door body subassembly, locking mechanism and bottom support subassembly. Main frame is welded from rectangular steel pipe, and is equipped with reinforced column in corner portion, built -in guard board is double -deck structure, and the outer layer cold rolled steel sheet is connected with the inner layer composite material board through spot welding, external reinforcing rib subassembly adopts U -shaped reinforcing rib and promotes the compression resistance, and anti -impact buffer layer is made of high density polyurethane foam, and is equipped with hemispherical convex on the surface, and door body subassembly realizes the sealing through the silica rubber sealing strip, and locking mechanism ensures quick locking through spring and inclined plane structure, and bottom support subassembly enhances stability through support foot and rubber pad. The application has improved the protection intensity of shell significantly, has light weight and functionality, and has strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment protection technology, and in particular to a low-voltage cabinet housing with high protection strength. Background Technology

[0002] In power systems, low-voltage switchgear, as an important power distribution device, is widely used in various industrial and civil applications. The enclosure of a low-voltage switchgear is not merely a simple shell structure; it also needs to possess certain protective properties to ensure the safe operation of internal electrical components and provide effective isolation from the external environment. This helps improve the reliability and lifespan of the equipment.

[0003] Because low-voltage switchgear is typically installed in complex environments, it may face issues such as mechanical shock, external pressure, or foreign object intrusion. Therefore, the protective strength of the enclosure is particularly important. Existing low-voltage switchgear enclosures are mostly constructed using metal sheet metal combined with welding or assembly. However, in practical applications, their structural design often fails to fully meet the requirements of high-strength protection. For example, under significant external impact, the enclosure is prone to deformation or damage, leading to a decrease in protective performance. Repairing or replacing the enclosure requires considerable time and cost. Therefore, there is still room for improvement in the protective strength of existing enclosures. Utility Model Content

[0004] The purpose of this utility model is to provide a low-voltage cabinet housing with high protective strength, which solves the problems mentioned in the background art.

[0005] This invention is achieved by providing a low-voltage cabinet housing with high protective strength.

[0006] The main frame, constructed from welded rectangular steel tubing, includes reinforced columns at each of its four corners. It also includes:

[0007] An embedded protective panel is fixed to the front side of the main frame by bolts. The embedded protective panel has a double-layer structure, with an outer layer of cold-rolled steel plate and an inner layer of high-strength composite material plate. The two layers are fixedly connected by spot welding. The embedded protective panel has outwardly extending flange structures around its perimeter. The flange structures fit against the inner sidewall of the main frame and are fixed by bolts.

[0008] An external reinforcing rib assembly includes multiple transverse and longitudinal reinforcing ribs, which are arranged along the length and width of the main frame, respectively, and are fixed by welding at their intersections. The cross-sections of the transverse and longitudinal reinforcing ribs are U-shaped, with their openings facing outwards from the main frame, and both ends of the reinforcing ribs are fixed to the sidewalls of the main frame by bolts.

[0009] An impact-resistant buffer layer is provided between the inner wall of the main frame and the embedded protective plate. The impact-resistant buffer layer is made of high-density polyurethane foam material with a thickness of 10mm to 20mm. The surface of the impact-resistant buffer layer is provided with multiple evenly distributed protrusions. The protrusions are hemispherical in shape and have a diameter of 5mm to 8mm.

[0010] The door assembly includes a door frame and a door panel. The door frame is connected to one side of the main frame via a hinge. The door panel is fixed to the inside of the door frame with bolts. A sealing strip is provided on the inside of the door panel. The sealing strip is made of silicone rubber and has a trapezoidal cross-sectional shape. Its wider end fits against the door panel, and its narrower end fits against the contact surface of the main frame.

[0011] The locking mechanism includes multiple latches and lock seats. The latches are fixed to the outside of the door frame, and the lock seats are fixed to the outside of the main frame. The latches and lock seats are locked together by a snap-fit ​​mechanism. The latches have a spring structure inside, and the two ends of the spring structure are fixedly connected to the inner wall of the latch and the latch tongue, respectively. The front end of the latch tongue has a bevel structure, which is used to guide the latch tongue into the slot of the lock seat.

[0012] The bottom support assembly includes a base plate and support feet. The base plate is fixed to the bottom of the main frame by bolts, and the support feet are fixed to the four corners of the base plate by threaded connections. The bottom of the support feet is provided with rubber pads with a thickness of 5mm to 10mm and anti-slip texture on the surface of the rubber pads.

[0013] Preferably, the top of the main frame is provided with a top cover, the top cover is made of aluminum alloy, and the top cover is provided with a downwardly extending folded edge structure around its perimeter. The folded edge structure fits into the top edge of the main frame and is fixed by bolts. The inner side of the top cover is provided with a heat insulation layer, the heat insulation layer is made of rock wool, and the thickness of the heat insulation layer is 20mm to 30mm.

[0014] Preferably, the outer cold-rolled steel plate of the embedded protective plate has a thickness of 2mm to 3mm, the inner high-strength composite material plate has a thickness of 5mm to 8mm, and the spot weld spacing between the two layers is 50mm to 80mm.

[0015] Preferably, the raised structures of the impact-resistant buffer layer are arranged in an alternating manner, and the center distance between two adjacent raised structures is 10mm to 15mm.

[0016] Preferably, the inner side of the door frame is provided with a guide groove, the cross-sectional shape of the guide groove is T-shaped, and the door panel is provided with T-shaped flanges around its perimeter that cooperate with the guide groove. The T-shaped flanges are inserted into the guide groove and fixed by bolts.

[0017] Preferably, there are four latches, located at the four corners of the door frame, and the number of lock seats is the same as the number of latches, with each lock seat aligned with the corresponding latch.

[0018] The present invention provides a low-voltage cabinet housing with high protective strength, the advantages of which are:

[0019] This utility model forms a multi-layered protection system through the combined design of a main frame, an embedded protective plate, an external reinforcing rib assembly, an impact-resistant buffer layer, a door assembly, a locking mechanism, and a bottom support assembly. The main frame is welded from rectangular steel pipes and reinforced with columns at the four corners, improving the overall structural rigidity. The embedded protective plate has a double-layer structure: an outer layer of cold-rolled steel plate and an inner layer of high-strength composite material plate, fixed together by spot welding, enhancing impact resistance while reducing overall weight. The external reinforcing rib assembly further improves the shell's compressive strength through U-shaped reinforcing ribs arranged horizontally and vertically. The impact-resistant buffer layer is made of high-density polyurethane foam with hemispherical protrusions on its surface, effectively absorbing and dispersing external impact forces. The door assembly achieves a good sealing effect through a sealing strip design, preventing foreign object intrusion. The locking mechanism, through the combination of a spring structure and a beveled structure, ensures quick locking and stable connection of the door. The bottom support assembly, through a combination of support feet and rubber pads, enhances the shell's stability and provides anti-slip functionality. In summary, this utility model significantly improves the protective strength of the low-voltage cabinet shell through the synergistic effect of multiple structures, while also taking into account lightweight and functionality, and has high practical value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the arrangement of the main frame, the embedded protective plate, the external reinforcing rib assembly, and the door assembly.

[0021] Figure 2 This is a cross-sectional schematic diagram of the embedded protective plate of this utility model, which shows in detail the double-layer structure and its connection with the impact-resistant buffer layer.

[0022] Figure 3 This is a partially enlarged schematic diagram of the locking mechanism of this utility model, focusing on the snap-fit ​​structure between the latch and the lock seat, as well as the design of the spring and the inclined surface.

[0023] The attached diagram is labeled as follows: 1. Main frame; 2. Embedded protective panel; 3. External reinforcing rib assembly; 4. Impact-resistant buffer layer; 5. Door assembly; 6. Locking mechanism; 7. Bottom support assembly; 8. Top cover; 9. Cold-rolled steel plate; 10. High-strength composite material plate; 11. Protruding structure; 12. Lock; 13. Lock seat; 14. Spring structure; 15. Sloping surface structure. Detailed Implementation

[0024] This utility model relates to a low-voltage cabinet housing with high protective strength, and its specific implementation is described in conjunction with the attached diagram. Figure 1 To be continued Figure 3 Detailed explanation follows. (Attached) Figure 1 This is a schematic diagram of the overall structure, showing the arrangement of the main frame 1, the embedded protective panel 2, the external reinforcing rib assembly 3, and the door assembly 5; (Attached) Figure 2 This is a cross-sectional schematic diagram of the embedded protective panel 2, showing the double-layer structure and its connection method with the impact-resistant buffer layer 4; (See attached diagram) Figure 3 This is a partially enlarged schematic diagram of the locking mechanism 6, highlighting the snap-fit ​​structure between the latch 12 and the lock seat 13, as well as the design of the spring structure 14 and the inclined surface structure 15.

[0025] The main frame 1 is welded from rectangular steel pipes, with reinforcing columns at its four corners to enhance overall rigidity. An embedded protective plate 2 is bolted to the front of the main frame 1. The embedded protective plate 2 has a double-layer structure: an outer layer of cold-rolled steel plate 9 and an inner layer of high-strength composite material plate 10. The two layers are fixedly connected by spot welding with a spacing of 50mm to 80mm. The embedded protective plate 2 has outward-extending flanges around its perimeter, which fit snugly against the inner wall of the main frame 1 and are bolted together. This connection method ensures a tight fit between the embedded protective plate 2 and the main frame 1, while the flanges effectively disperse external impact forces, preventing stress concentration at any single point.

[0026] The external reinforcing rib assembly 3 includes multiple transverse and longitudinal reinforcing ribs. The transverse reinforcing ribs are arranged along the length of the main frame 1, and the longitudinal reinforcing ribs are arranged along the width of the main frame 1. The two are fixed together by welding at their intersections. Both the transverse and longitudinal reinforcing ribs have a U-shaped cross-section, with their openings facing outwards from the main frame 1. The two ends of the reinforcing ribs are fixed to the side walls of the main frame 1 by bolts. This design enhances the overall compressive strength of the main frame 1, while the U-shaped cross-section effectively disperses external pressure and prevents shell deformation.

[0027] An impact-absorbing buffer layer 4 is disposed between the inner wall of the main frame 1 and the embedded protective panel 2. It is made of high-density polyurethane foam with a thickness of 10mm to 20mm. The surface of the impact-absorbing buffer layer 4 has multiple evenly distributed protrusions 11. Each protrusion 11 is hemispherical in shape, with a diameter of 5mm to 8mm, and is arranged in a staggered pattern. The center-to-center distance between adjacent protrusions 11 is 10mm to 15mm. The impact-absorbing buffer layer 4 is fixed to the inner wall of the main frame 1 by adhesive bonding. Its protrusions 11 contact the inner high-strength composite material plate 10 of the embedded protective panel 2, forming a certain gap to absorb and disperse external impact forces.

[0028] Door assembly 5 includes a door frame and a door panel. The door frame is connected to one side of the main frame 1 via hinges, and the door panel is fixed to the inside of the door frame with bolts. A guide groove with a T-shaped cross-section is provided on the inside of the door frame. T-shaped flanges that mate with the guide groove are provided around the perimeter of the door panel, inserted into the guide groove and fixed with bolts. A sealing strip made of silicone rubber is provided on the inside of the door panel. The sealing strip has a trapezoidal cross-section, with its wider end fitting against the door panel and its narrower end fitting against the contact surface of the main frame 1. The sealing strip is fixed to the inside of the door panel by adhesive, ensuring a good seal when the door is closed.

[0029] The locking mechanism 6 includes multiple latches 12 and lock seats 13. The latches 12 are fixed to the outside of the door frame, and the lock seats 13 are fixed to the outside of the main frame 1. The latches 12 and lock seats 13 are locked together by a snap-fit ​​mechanism. There are four latches 12, located at the four corners of the door frame. The number of lock seats 13 is the same as the number of latches 12, and each lock seat 13 is aligned with the corresponding latch 12. A spring structure 14 is installed inside each latch 12. The two ends of the spring structure 14 are fixedly connected to the inner wall of the latch 12 and the latch tongue, respectively. A beveled structure 15 is provided at the front end of the latch tongue to guide it into the slot of the lock seat 13. When the door is closed, the latch tongue automatically slides into the slot of the lock seat 13 through the beveled structure 15, and the spring structure 14 provides a restoring force to keep the latch tongue stably connected.

[0030] The bottom support assembly 7 includes a base plate and support feet. The base plate is fixed to the bottom of the main frame 1 with bolts, and the support feet are fixed to the four corners of the base plate with threaded connections. The bottom of each support foot is equipped with a rubber pad, which is 5mm to 10mm thick and has anti-slip texture. The rubber pad is fixed to the bottom of the support foot by adhesive bonding, effectively enhancing the stability of the housing and preventing slippage.

[0031] The main frame 1 has a top cover 8 made of aluminum alloy. The top cover 8 has downward-extending folded edges around its perimeter, which fit snugly against the top edge of the main frame 1 and are secured with bolts. The inside of the top cover 8 has a heat insulation layer made of rock wool, with a thickness of 20mm to 30mm. The heat insulation layer is glued to the inside of the top cover 8, effectively isolating external heat and protecting the normal operation of internal electrical components.

[0032] The connection and positional relationships between the aforementioned components ensure the integrity and protective performance of the housing. The main frame 1, as the basic structure, is fixed to other components through welding and bolting, forming a stable frame system. The combined design of the embedded protective plate 2 and the impact-resistant buffer layer 4 not only improves impact resistance but also effectively disperses impact force through the raised structure 11. The external reinforcing rib assembly 3 further enhances the housing's compressive strength, while the door assembly 5 and locking mechanism 6 achieve good sealing and quick locking through sealing strips and snap-fit ​​structures. The bottom support assembly 7 enhances the housing's stability and provides anti-slip functionality through the combination of support feet and rubber pads. The design of the top cover 8 and its insulation layer effectively isolates the influence of the external environment, ensuring the safe operation of internal electrical components.

[0033] In practical applications, this low-voltage cabinet housing can adapt to complex installation environments, such as industrial plants or outdoor locations. When subjected to external mechanical impact, the embedded protective plate 2 and the impact-resistant buffer layer 4 work together to absorb and disperse the impact force, preventing housing deformation. The external reinforcing rib assembly 3 further enhances the housing's compressive strength through its U-shaped cross-section design, ensuring stability even under high-pressure environments. The door assembly 5 achieves a good sealing effect through the design of the sealing strip, preventing the intrusion of foreign objects. At the same time, the locking mechanism 6 ensures quick locking and stable connection of the door through the cooperation of the spring structure 14 and the inclined structure 15. The bottom support assembly 7 enhances the stability of the housing and provides anti-slip function through the combination design of support feet and rubber pads, making it suitable for uneven ground environments. The design of the top cover 8 and its heat insulation layer effectively isolates external heat, protecting the normal operation of internal electrical components, and is suitable for high-temperature or dusty environments.

[0034] The above content describes in detail the specific embodiments of this utility model, covering the connection relationship, positional relationship and mutual cooperation relationship of various components, ensuring the integrity and feasibility of the technical solution.

[0035] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0036] Firstly, during the installation of the low-voltage switchgear housing, the main frame 1, with its rectangular steel pipe welded foundation structure, together with the reinforcing columns at the four corners, forms the overall skeleton. The reinforcing columns effectively enhance the rigidity of the main frame 1, enabling it to withstand greater external pressure and impact. The embedded protective plate 2 is bolted to the front of the main frame 1. Its double-layer structure includes a cold-rolled steel plate 9 as the outer layer, which directly withstands external impact, and a high-strength composite material plate 10 as the inner layer, further enhancing its impact resistance. The two layers are fixedly connected by spot welding with a weld spacing of 50mm to 80mm. This connection method ensures the integrity and stability of the double-layer structure. Simultaneously, the flanged structure around the embedded protective plate 2 fits tightly against the inner wall of the main frame 1 and is fixed with bolts. This design not only achieves a tight fit between the embedded protective plate 2 and the main frame 1 but also disperses external impact through the flanged structure, preventing stress concentration at any single point.

[0037] Secondly, the shock-absorbing buffer layer 4 plays a crucial role when the low-voltage cabinet shell is subjected to external mechanical impact. The shock-absorbing buffer layer 4 is made of high-density polyurethane foam material with a thickness of 10mm to 20mm. Its surface is provided with multiple hemispherical protrusions 11, each with a diameter of 5mm to 8mm, arranged in a staggered pattern. The center-to-center distance between adjacent protrusions 11 is 10mm to 15mm. The shock-absorbing buffer layer 4 is fixed to the inner wall of the main frame 1 by adhesive bonding. Its protrusions 11 contact the inner high-strength composite material plate 10 of the embedded protective plate 2, forming a certain gap to absorb and disperse external impact forces. In practical applications, when external impact forces act on the shell, the protrusions 11 of the shock-absorbing buffer layer 4 absorb part of the impact energy through compression deformation, while simultaneously distributing the remaining impact force evenly into the double-layer structure of the embedded protective plate 2, thereby preventing localized deformation or damage to the shell.

[0038] Furthermore, the external reinforcing rib assembly 3 further enhances the shell's compressive strength through the arrangement of transverse and longitudinal reinforcing ribs. The transverse reinforcing ribs are arranged along the length of the main frame 1, and the longitudinal reinforcing ribs are arranged along the width of the main frame 1, with the two ribs fixed together by welding at their intersections. Both the transverse and longitudinal reinforcing ribs have a U-shaped cross-section, with their openings facing outwards from the main frame 1, and both ends of the reinforcing ribs are bolted to the sidewalls of the main frame 1. This design not only enhances the overall compressive strength of the main frame 1 but also effectively disperses external pressure through the U-shaped cross-section, preventing the shell from deforming under high pressure. In practical applications, when the shell is subjected to external pressure, the external reinforcing rib assembly 3 distributes the pressure evenly across the entire main frame 1 through its U-shaped cross-section, thus ensuring the shell remains stable even in complex environments.

[0039] Subsequently, the design of door assembly 5 ensures the sealing of the housing and its quick-locking function. The door frame is connected to one side of the main frame 1 via hinges, and the door panel is fixed to the inside of the door frame with bolts. A T-shaped guide groove is provided on the inside of the door frame, and T-shaped flanges that mate with the guide groove are provided around the perimeter of the door panel. The T-shaped flanges are inserted into the guide groove and fixed with bolts. A silicone rubber sealing strip is provided on the inside of the door panel. The sealing strip has a trapezoidal cross-section, with the wider end fitting against the door panel and the narrower end fitting against the contact surface of the main frame 1. The sealing strip is fixed to the inside of the door panel by adhesive, ensuring a good sealing effect when the door is closed and preventing the intrusion of foreign objects. In practical applications, when the door is closed, the sealing strip, through its elastic deformation, fits tightly against the contact surface of the main frame 1, thereby achieving the sealing function. Simultaneously, the locking mechanism 6 achieves quick locking through the snap-fit ​​structure between the latch 12 and the lock seat 13. There are four latches 12, located at the four corners of the door frame. The number of lock seats 13 is the same as the number of latches 12, with each lock seat 13 aligned with its corresponding latch 12. Each latch 12 has a spring structure 14 inside, with both ends fixedly connected to the inner wall of the latch 12 and the latch bolt, respectively. The front end of the latch bolt has a beveled structure 15. When the door is closed, the latch bolt automatically slides into the slot of the lock seat 13 via the beveled structure 15, and the spring structure 14 provides a restoring force to keep the latch bolt stably connected. This design ensures quick locking and stable connection of the door, improving operational convenience.

[0040] Next, the bottom support assembly 7 enhances the stability of the housing and provides anti-slip functionality through the combination design of the base plate and support feet. The base plate is fixed to the bottom of the main frame 1 with bolts, and the support feet are fixed to the four corners of the base plate with threaded connections. The bottom of the support feet is equipped with rubber pads, which are 5mm to 10mm thick and have anti-slip textures on their surface. The rubber pads are fixed to the bottom of the support feet by adhesive bonding, effectively enhancing the stability of the housing and preventing slippage. In practical applications, when the housing is placed on uneven ground, the combination design of the support feet and rubber pads, by adjusting the height of the support feet and the anti-slip properties of the rubber pads, ensures that the housing can be placed stably and prevents slippage.

[0041] Finally, the design of the top cover 8 and its insulation layer effectively isolates the influence of the external environment, protecting the normal operation of the internal electrical components. The top cover 8 is made of aluminum alloy, with downward-extending folded edges around its perimeter. These folded edges fit snugly against the top edge of the main frame 1 and are secured with bolts. The inner side of the top cover 8 is lined with a rock wool insulation layer, 20mm to 30mm thick, which is adhesively fixed to the inner side of the top cover 8. In practical applications, when the housing is in a high-temperature or dusty environment, the insulation layer of the top cover 8 effectively isolates external heat through its excellent insulation performance, thereby protecting the safe operation of the internal electrical components.

[0042] In summary, this utility model, through the synergistic action of the main frame 1, the embedded protective plate 2, the external reinforcing rib assembly 3, the impact-resistant buffer layer 4, the door assembly 5, the locking mechanism 6, the bottom support assembly 7, and the top cover 8, forms a multi-layered protective system. The connection and positional relationships between the various components ensure the integrity and protective performance of the shell, enabling it to adapt to complex installation environments and meet the requirements of high-strength protection. The above content describes in detail the specific implementation principle of this utility model, covering the operational process of each component, ensuring the completeness and feasibility of the technical solution.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low voltage cabinet housing with high protection strength, comprising a main frame (1), characterized in that, Also includes: Embedded protective plate (2), the front side of the main frame (1) is fixedly connected to the embedded protective plate (2) by bolts. The embedded protective plate (2) is a double-layer structure. Its outer layer is a cold-rolled steel plate (9) and its inner layer is a high-strength composite material plate (10). The two layers are fixedly connected by spot welding. The embedded protective plate (2) is provided with outwardly extending flange structure around its perimeter. The flange structure is attached to the inner side wall of the main frame (1) and fixed by bolts. The external reinforcing rib assembly (3) includes multiple transverse reinforcing ribs and longitudinal reinforcing ribs. The transverse reinforcing ribs are arranged along the length direction of the main frame (1), and the longitudinal reinforcing ribs are arranged along the width direction of the main frame (1). The two are fixed by welding at the intersection. The cross sections of the transverse and longitudinal reinforcing ribs are both U-shaped, with the opening direction facing the outside of the main frame (1). The two ends of the reinforcing ribs are fixed to the side wall of the main frame (1) by bolts. Impact-resistant buffer layer (4), the impact-resistant buffer layer (4) is disposed between the inner side wall of the main frame (1) and the embedded protective plate (2), the impact-resistant buffer layer (4) is made of high-density polyurethane foam material with a thickness of 10mm to 20mm, and the surface of the impact-resistant buffer layer (4) is provided with multiple uniformly distributed protrusions (11), the protrusions (11) are hemispherical in shape and have a diameter of 5mm to 8mm; The door assembly (5) includes a door frame and a door panel. The door frame is connected to one side of the main frame (1) by a hinge. The door panel is fixed to the inside of the door frame by bolts. A sealing strip is provided on the inside of the door panel. The sealing strip is made of silicone rubber and has a trapezoidal cross-sectional shape. The locking mechanism (6) includes multiple latches (12) and lock seats (13). The latches (12) are fixed on the outside of the door frame, and the lock seats (13) are fixed on the outside of the main frame (1). The latches (12) and lock seats (13) are locked by snap-fit. The latches (12) are provided with a spring structure (14) inside. The two ends of the spring structure (14) are fixedly connected to the inner wall of the latches (12) and the lock tongue, respectively. The front end of the lock tongue is provided with a bevel structure (15). The bottom support assembly (7) includes a base plate and support feet. The base plate is fixed to the bottom of the main frame (1) by bolts, and the support feet are fixed to the four corners of the base plate by threaded connection. The bottom of the support feet is provided with rubber pads with a thickness of 5mm to 10mm and anti-slip texture on the surface of the rubber pads.

2. The low voltage switchgear housing of claim 1, wherein, The top of the main frame (1) is provided with a top cover (8), which is made of aluminum alloy. The top cover (8) has a downward-extending folded edge structure around its perimeter. The folded edge structure fits into the top edge of the main frame (1) and is fixed by bolts. The inner side of the top cover (8) is provided with a heat insulation layer, which is made of rock wool and has a thickness of 20mm to 30mm.

3. The low voltage switchgear enclosure of claim 1, wherein, The outer cold-rolled steel plate (9) of the embedded protective plate (2) has a thickness of 2mm to 3mm, the inner high-strength composite material plate (10) has a thickness of 5mm to 8mm, and the spot welding distance between the two layers is 50mm to 80mm.

4. The low voltage switchgear enclosure of claim 1, wherein, The raised structures (11) of the shock-absorbing buffer layer (4) are arranged in an alternating manner, and the center distance between two adjacent raised structures (11) is 10mm to 15mm.

5. The low voltage switchgear enclosure of claim 1, wherein, The inner side of the door frame is provided with a guide groove, the cross-sectional shape of the guide groove is T-shaped, and the door panel is provided with T-shaped flanges around its perimeter that cooperate with the guide groove. The T-shaped flanges are inserted into the guide groove and fixed by bolts.

6. The low voltage switchgear enclosure of claim 1, wherein, The number of latches (12) is four, located at the four corners of the door frame. The number of lock seats (13) is the same as the number of latches (12), and the position of each lock seat (13) is aligned with the corresponding latch (12).

7. The low voltage switchgear enclosure of claim 1, wherein, The main frame (1) is welded from rectangular steel pipes, and reinforced columns are provided at the four corners of the main frame (1).

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