A metal-clad switchgear with internal arc protection

Abstract

The application relates to the technical field of switch cabinets, and discloses a metal armored switch cabinet with internal arc burning protection, which comprises a switch cabinet body, four pressure relief plates are fixedly connected to the back surface of the outer wall of the switch cabinet body through nylon bolts, and four pressure relief pipelines are through-connected to the back surface of the inner wall of the switch cabinet body. With the continuous increase of the gas pressure in the inner cavity of the switch cabinet body, the high-pressure gas pushes the pressure relief plates to slide, drives the sliding plates, hinges and limiting rods to slide, and the high-pressure gas also pushes the pressure relief plates to rotate in the process of pushing the pressure relief plates to slide. In the initial stage of the sliding of the pressure relief plates, the spacing between the pressure relief plates and the switch cabinet body is increased, part of the high-pressure gas is discharged through the spacing, the concentrated impact on the hinges is dispersed through the combined action of sliding and rotating, the stress load of the hinges is reduced, the deformation of the hinges caused by excessive instantaneous impact force is effectively prevented, the problem that the smooth rotation of the pressure relief plates at a large angle is hindered is further prevented, and stable and reliable pressure relief protection is achieved.

Description

Technical Field

[0001] This invention relates to the field of switchgear equipment technology, specifically to a metal-clad switchgear with internal arc protection. Background Technology

[0002] Metal-clad switchgear with internal arc protection employs a dual protection system of passive arc resistance and active arc extinguishing. In the event of an internal arc fault, this system can limit the spread of arc energy and prevent the fault from propagating, while ensuring the safety of on-site operators, peripheral equipment, and the power supply system. It complies with the mandatory testing and design requirements of IEC and national standards and is widely used in power grids, industries, data centers, rail transportation, and other scenarios with high requirements for power supply safety and personnel protection.

[0003] When an electric arc is generated inside the switchgear, the temperature inside the chamber rises sharply, causing the internal gas pressure to rise rapidly. When the pressure exceeds the preset threshold, the high-pressure gas will push open the dedicated pressure relief plate through the independently set pressure release channel and be released to the outside. However, after the pressure relief plate is subjected to high pressure impact, the impact load is easily concentrated at the hinge position. Excessive load may cause the hinge to deform, affecting the rotation of the pressure relief plate, which may result in insufficient opening angle of the pressure relief plate, making it difficult to release the pressure inside the switchgear quickly. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a metal-armored switchgear with internal arc protection, including a switchgear body, four pressure relief plates fixedly connected to the back of the outer wall of the switchgear body by nylon bolts, and four pressure relief pipes connected through the back of the inner wall of the switchgear body. The pressure relief plates can be fixed or removed by nylon bolts. The switchgear also includes: The main structure is slidably mounted on the inner wall of the switch cabinet body; The limit mechanism is fixedly installed on the back of the outer wall of the switch cabinet body; The current diversion mechanism is fixedly installed on the back of the outer wall of the switch cabinet body; In use, when an electric arc fault occurs inside the switchgear body during operation, the air inside the switchgear body will be rapidly heated by the high temperature generated by the electric arc, causing the air pressure inside the chamber to rise rapidly. The high-pressure gas will act on the pressure relief plate along the pressure relief pipe inside the switchgear body, causing it to impact.

[0005] Preferably, the main structure includes: The mounting components are slidably mounted on the inner wall of the switch cabinet body; The mounting assembly is used to install the pressure relief plate, so that the pressure relief plate can rotate when high-pressure gas impacts it.

[0006] Preferably, the limiting mechanism includes: The sliding component is fixedly installed on the back of the outer wall of the switch cabinet body; A blocking component is fixedly mounted on top of the mounting component.

[0007] Preferably, the traffic diversion mechanism includes: A flow guiding component is fixedly installed on the back of the outer wall of the switch cabinet body; The push component is fixedly mounted on top of the flow guide component.

[0008] Preferably, the mounting components include four sliding grooves formed on the side of the switch cabinet body near the pressure relief plate, and the inner walls of the four sliding grooves are slidably connected with sliding plates.

[0009] Preferably, the mounting assembly also includes two hinges fixedly connected to the side of the sliding plate near the pressure relief plate, the eight hinges are in pairs, and the four pressure relief plates on the side near the sliding plate are fixedly connected to the four sets of hinges on the side away from the sliding plate. As the gas pressure in the internal cavity of the switch cabinet continues to rise, the pressure relief plate will be subjected to high-pressure impact, causing the nylon bolts to break. After the nylon bolts break, the high-pressure gas will push the pressure relief plate to slide.

[0010] Preferably, the sliding assembly includes eight fixed frames that are fixedly connected to the side of the switch cabinet body near the pressure relief plate; Two limiting rods are fixedly connected to the side of each of the four sliding plates near the pressure relief plate, and the inner walls of the eight fixed frames are slidably connected to the outer walls of the eight limiting rods. When the pressure relief plate slides, it drives the sliding plate, hinge and limit rod to slide. In the process of pushing the pressure relief plate to slide, the high pressure gas will also push the pressure relief plate to rotate around the rotation center of the hinge. In the initial stage of the pressure relief plate sliding, it will increase the distance between it and the switch cabinet body. Some of the high pressure gas will be discharged through this distance to achieve pre-pressure relief. As the pressure relief plate rotates rapidly, the flow area of ​​the pressure relief pipe increases rapidly, forming a smooth and gradual pressure relief process. This reduces the impact force of high-pressure gas. At the same time, the combined action of sliding and rotation disperses the concentrated impact on the hinge, reduces the stress load on the hinge, and effectively prevents the hinge from deforming due to excessive instantaneous impact force, thus hindering the smooth rotation of the pressure relief plate at large angles. This achieves stable and reliable pressure relief protection.

[0011] Preferably, the blocking assembly includes a connecting frame fixedly connected to the top of the outer wall of the sliding plate, the outer walls of the four connecting frames are slidably connected to the inner walls of the four sliding grooves, and the inner walls of the four connecting frames are each provided with two sliding holes. The inner walls of the eight sliding holes are all slidably connected with inclined spring rods, and the four pressure relief plates are all fixedly connected with inclined extrusion blocks on the side away from the switch cabinet body. When the pressure relief plate rotates, it drives the inclined extrusion block to rotate. As the inclined extrusion block continues to rotate, its inclined surface comes into contact with the inclined surface of the inclined spring rod. The inclined extrusion block then squeezes the inclined spring rod to move, causing the two inclined spring rods to accumulate rebound force and move away from each other. When the inclined extrusion block continues to rotate, it separates from the inclined spring rod. At this time, the rebound force of the inclined spring rod is released, causing the two inclined spring rods to come into contact with each other. When the impact force of the high-pressure gas in the pressure relief pipe on the pressure relief plate weakens, the inclined spring rod will block the inclined extrusion block from descending, thereby preventing the pressure relief plate from returning to its original position. This effectively prevents the pressure relief plate from rotating in the opposite direction due to its own weight when there are large fluctuations in the gas pressure inside the switchgear. When the gas pressure inside the switchgear increases again, the high-pressure gas will impact the pressure relief plate again, which can easily lead to the pressure relief plate being subjected to multiple impacts.

[0012] Preferably, the flow guiding assembly includes eight fixed brackets fixedly connected to the side of the switch cabinet body near the pressure relief plate, and the inner walls of the eight fixed brackets are rotatably connected with flow guiding plates; When the pressure relief plate slides due to the impact of high-pressure gas, the high-pressure gas in the pressure relief pipe rushes outward. The guide plate directs the high-pressure gas to flow in the direction of its inclination, thereby controlling the flow direction of the high-pressure gas flow. This effectively prevents turbulence from forming when the high-pressure gas is discharged from the left and right sides of the pressure relief plate, which would otherwise impact adjacent equipment.

[0013] Preferably, the actuating component includes a connecting block fixedly connected to the top of the outer wall of the guide plate, and two connecting rods fixedly connected to the side of each of the four sliding plates near the pressure relief plate; The inner walls of the eight connecting blocks are all provided with sliding grooves, and the inner walls of the eight sliding grooves are slidably connected to the outer walls of the eight connecting rods. When the pressure relief plate slides and increases the distance between itself and the switchgear body, some high-pressure gas will be discharged from the left and right sides of the pressure relief plate. At the same time, when the pressure relief plate and the sliding plate slide, the sliding plate will drive the connecting rod to move, and the connecting rod will push the connecting block to rotate, thereby driving the guide plate to rotate. Some high-pressure gas will also act on the guide plate, increasing the rotational resistance of the guide plate, and thus increasing the sliding resistance of the pressure relief plate and the sliding plate. This effectively prevents the pressure relief plate from generating a large eccentric inertial force when it rotates rapidly, which would cause the sliding plate to slide rapidly and hit the fixed frame, thus generating a strong reaction force and causing the sliding plate to vibrate, which in turn causes the hinge and the pressure relief plate to vibrate, thereby further reducing the impact on the hinge.

[0014] The present invention has the following beneficial effects: (1) When the present invention is used, as the gas pressure in the internal cavity of the switch cabinet body continues to rise, the high-pressure gas will push the pressure relief plate to slide, which will drive the sliding plate, hinge and limit rod to slide. In the process of pushing the pressure relief plate to slide, the high-pressure gas will also push the pressure relief plate to rotate. In the initial stage of the pressure relief plate sliding, the distance between it and the switch cabinet body will increase. Some of the high-pressure gas will be discharged through this distance to achieve pre-pressure relief. At the same time, the combined action of sliding and rotating disperses the concentrated impact on the hinge, reduces the stress load on the hinge, and effectively prevents the hinge from deforming due to excessive instantaneous impact force, thereby hindering the smooth rotation of the pressure relief plate at a large angle, thus achieving stable and reliable pressure relief protection.

[0015] (2) When the pressure relief plate rotates, it will drive the inclined extrusion block to rotate. As the inclined extrusion block continues to rotate, it will squeeze the inclined spring rod to move. When the impact force of the high pressure gas in the pressure relief pipe on the pressure relief plate weakens, the inclined spring rod will block the inclined extrusion block from descending, thereby preventing the pressure relief plate from returning to its original position. This effectively prevents the pressure relief plate from rotating in the opposite direction due to its own weight when the gas pressure in the switch cabinet body fluctuates greatly. When the gas pressure in the switch cabinet body decreases, the pressure relief plate will be affected by its own weight and rotate a certain distance. When the gas pressure in the switch cabinet body increases again, the high pressure gas will impact the pressure relief plate again, which will easily cause the pressure relief plate to be impacted multiple times.

[0016] (3) When the pressure relief plate of the present invention slides and increases the distance between it and the switch cabinet body, some high-pressure gas will be discharged from the left and right sides of the pressure relief plate. At the same time, when the pressure relief plate and the sliding plate slide, the guide plate is driven to rotate by the pushing component, and some high-pressure gas will also act on the guide plate, increasing the rotation resistance of the guide plate and increasing the sliding resistance of the sliding plate. This effectively prevents the pressure relief plate from generating a large eccentric inertial force when it rotates rapidly, which will cause the sliding plate to slide rapidly and hit the fixed frame, thereby generating a strong reaction force, causing the sliding plate to vibrate, which in turn causes the hinge and the pressure relief plate to vibrate, thereby further reducing the impact on the hinge.

[0017] (4) The inclined extrusion block of the present invention is difficult to descend due to the obstruction of the inclined spring rod, which will keep the pressure relief plate in the open state, increase the heat dissipation area inside the switch cabinet body, facilitate the rapid dissipation of the internal temperature of the switch cabinet body after the arc is extinguished, reduce the structural thermal stress damage of the switch cabinet body, and extend the equipment life; In addition, the high pressure gas is allowed to flow along the inclined direction of the guide plate through the guide plate, thereby controlling the flow direction of the high pressure gas flow, effectively preventing the formation of turbulence when the high pressure gas is discharged from the left and right sides of the pressure relief plate, which would impact adjacent equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view schematic diagram of the switch cabinet body of the present invention; Figure 3 This is a schematic diagram of the left sectional view of the switch cabinet of the present invention; Figure 4 This is a rear view schematic diagram of the pressure relief plate of the present invention; Figure 5 This is a schematic diagram of the sliding plate structure of the present invention; Figure 6 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the fixing frame structure of the present invention; Figure 8 This is a schematic diagram of the guide plate structure of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point B in the middle; Figure 10 This is a schematic diagram of the working process of the pressure relief plate of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Main structure; 11. Mounting assembly; 12. Switch cabinet body; 13. Pressure relief plate; 14. Pressure relief pipe; 111. Sliding plate; 112. Hinge; 2. Limiting mechanism; 21. Sliding assembly; 22. Blocking assembly; 211. Fixing frame; 212. Limiting rod; 221. Connecting frame; 222. Inclined spring rod; 223. Inclined extrusion block; 3. Flow guiding mechanism; 31. Flow guiding assembly; 32. Pushing assembly; 311. Fixing frame; 312. Flow guiding plate; 321. Connecting block; 322. Connecting rod. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1, please refer to Figures 1-5 This invention relates to a metal-armored switchgear with internal arc protection, comprising a switchgear body 12, four pressure relief plates 13 fixedly connected to the back of the outer wall of the switchgear body 12 by nylon bolts, and four pressure relief pipes 14 extending through the back of the inner wall of the switchgear body 12. The pressure relief plates 13 can be fixed or removed by nylon bolts. The invention also includes: Main body 1, which is slidably mounted on the inner wall of switch cabinet body 12; Limiting mechanism 2 is fixedly installed on the back of the outer wall of the switch cabinet body 12; The flow diversion mechanism 3 is fixedly installed on the back of the outer wall of the switch cabinet body 12; In use, when an electric arc fault occurs inside the switch cabinet body 12 during operation, the air inside the switch cabinet body 12 will be rapidly heated by the high temperature generated by the electric arc, causing the air pressure inside the chamber to rise rapidly. The high-pressure gas will act on the pressure relief plate 13 along the pressure relief pipe 14 inside the switch cabinet body 12, causing it to impact.

[0023] Main body 1 includes: Mounting component 11 is slidably mounted on the inner wall of the switch cabinet body 12; The mounting component 11 is used to mount the pressure relief plate 13, so that the pressure relief plate 13 can rotate when high-pressure gas impacts it.

[0024] Limiting mechanism 2 includes: Sliding assembly 21 is fixedly installed on the back of the outer wall of the switch cabinet body 12; The blocking component 22 is fixedly mounted on top of the mounting component 11.

[0025] Traffic generation agency 3 includes: The flow guiding component 31 is fixedly installed on the back of the outer wall of the switch cabinet body 12; Push component 32 is fixedly mounted on top of flow guide component 31.

[0026] Example 2, please refer to Figures 3-10 The present invention is a metal armored switch cabinet with internal arc protection. Based on the first embodiment, the mounting component 11 includes four sliding grooves opened on the side of the switch cabinet body 12 near the pressure relief plate 13, and the inner walls of the four sliding grooves are slidably connected with sliding plates 111.

[0027] Mounting assembly 11 also includes two hinges 112 fixedly connected to the side of the sliding plate 111 near the pressure relief plate 13. The eight hinges 112 are in pairs, and the four pressure relief plates 13 are fixedly connected to the side of the four sets of hinges 112 away from the sliding plate 111 on the side of the sliding plate 111. As the gas pressure inside the switch cabinet body 12 continues to rise, the pressure relief plate 13 will be subjected to high pressure impact, causing the nylon bolts to break. After the nylon bolts break, the high pressure gas will push the pressure relief plate 13 to slide.

[0028] The sliding assembly 21 includes eight fixed frames 211 that are fixedly connected to the side of the switch cabinet body 12 near the pressure relief plate 13; Two limiting rods 212 are fixedly connected to the side of each of the four sliding plates 111 near the pressure relief plate 13, and the inner walls of the eight fixed frames 211 are slidably connected to the outer walls of the eight limiting rods 212. When the pressure relief plate 13 slides, it drives the sliding plate 111, hinge 112 and limit rod 212 to slide. In the process of pushing the pressure relief plate 13 to slide, the high pressure gas will also push the pressure relief plate 13 to rotate around the rotation center of the hinge 112. In the initial stage of sliding, the distance between the pressure relief plate 13 and the switch cabinet body 12 will increase, and some of the high pressure gas will be discharged through this distance to achieve pre-pressure relief. As the pressure relief plate 13 rotates rapidly, the flow area of ​​the pressure relief pipe 14 increases rapidly, forming a smooth and gradual pressure relief process. This reduces the impact force of the high-pressure gas. At the same time, the combined action of sliding and rotation disperses the concentrated impact on the hinge 112, reduces the stress load on the hinge 112, and effectively prevents the hinge 112 from deforming due to excessive instantaneous impact force, thus hindering the smooth rotation of the pressure relief plate 13 at a large angle, achieving stable and reliable pressure relief protection.

[0029] The blocking assembly 22 includes a connecting frame 221 fixedly connected to the top of the outer wall of the sliding plate 111. The outer walls of the four connecting frames 221 are slidably connected to the inner walls of the four sliding grooves, and the inner walls of the four connecting frames 221 are provided with two sliding holes. The inner walls of the eight sliding holes are all slidably connected with inclined spring rods 222, and the four pressure relief plates 13 are all fixedly connected with inclined extrusion blocks 223 on the side away from the switch cabinet body 12. When the pressure relief plate 13 rotates, it drives the inclined extrusion block 223 to rotate. As the inclined extrusion block 223 continues to rotate, its inclined surface comes into contact with the inclined surface of the inclined spring rod 222. The inclined extrusion block 223 then squeezes the inclined spring rod 222, causing it to move and accumulate rebound force, thus moving the two inclined spring rods 222 away from each other. When the inclined extrusion block 223 continues to rotate, it separates from the inclined spring rod 222. At this time, the rebound force of the inclined spring rod 222 is released, causing the two inclined spring rods 222 to come into contact with each other. When the impact force of the high-pressure gas in the pressure relief pipe 14 on the pressure relief plate 13 weakens, the inclined spring rod 222 will prevent the inclined extrusion block 223 from descending, thereby preventing the pressure relief plate 13 from returning to its original position. Figure 10As shown, this effectively prevents large fluctuations in the gas pressure inside the switchgear body 12. When the gas pressure inside the switchgear body 12 decreases, the pressure relief plate 13 will rotate in the opposite direction due to its own weight. When the gas pressure inside the switchgear body 12 increases again, the high-pressure gas will impact the pressure relief plate 13 again, which may cause the pressure relief plate 13 to be subjected to multiple impacts.

[0030] The flow guiding assembly 31 includes eight fixed brackets 311 fixedly connected to the side of the switch cabinet body 12 near the pressure relief plate 13, and the inner walls of the eight fixed brackets 311 are rotatably connected to the flow guiding plates 312. When the pressure relief plate 13 slides due to the impact of high-pressure gas, the high-pressure gas in the pressure relief pipe 14 rushes outward. The high-pressure gas is guided by the guide plate 312 to flow in the direction of inclination of the guide plate 312, thereby controlling the flow direction of the high-pressure gas flow. This effectively prevents the formation of turbulence when the high-pressure gas is discharged from the left and right sides of the pressure relief plate 13, which would impact adjacent equipment.

[0031] The push assembly 32 includes a connecting block 321 fixedly connected to the top of the outer wall of the guide plate 312, and two connecting rods 322 fixedly connected to the side of each of the four sliding plates 111 near the pressure relief plate 13. The inner walls of the eight connecting blocks 321 are all provided with sliding grooves, and the inner walls of the eight sliding grooves are slidably connected to the outer walls of the eight connecting rods 322. When the pressure relief plate 13 slides and increases the distance between itself and the switch cabinet body 12, some high-pressure gas will be discharged from the left and right sides of the pressure relief plate 13. At the same time, when the pressure relief plate 13 and the sliding plate 111 slide, the sliding plate 111 will drive the connecting rod 322 to move, and the connecting rod 322 will push the connecting block 321 to rotate, thereby driving the guide plate 312 to rotate. Some high-pressure gas will also act on the guide plate 312, increasing the rotational resistance of the guide plate 312, and thus increasing the sliding resistance of the pressure relief plate 13 and the sliding plate 111. This effectively prevents the pressure relief plate 13 from generating a large eccentric inertial force when it rotates rapidly, which would cause the sliding plate 111 to slide rapidly and hit the fixed frame 211, thereby generating a strong reaction force and causing the sliding plate 111 to vibrate, which in turn causes the hinge 112 and the pressure relief plate 13 to vibrate, thereby further reducing the impact on the hinge 112.

[0032] The number of the above components is not limited. Those skilled in the art can set it freely according to actual needs, as long as the above components are installed at the corresponding component connection positions.

[0033] A specific application of this embodiment is as follows: When the present invention is used, when an electric arc fault occurs inside the switch cabinet body 12 during operation, the air in the internal cavity of the switch cabinet body 12 will be rapidly heated by the high temperature generated by the electric arc, causing the air pressure in the cavity to rise rapidly. The high-pressure gas will act on the pressure relief plate 13 along the pressure relief pipe 14 in the switch cabinet body 12, and impact it. As the gas pressure in the internal chamber of the switchgear body 12 continues to rise, the pressure relief plate 13 will be subjected to high pressure impact, causing the nylon bolt to break. After the nylon bolt breaks, the high pressure gas will push the pressure relief plate 13 to slide, causing the sliding plate 111, hinge 112 and limit rod 212 to slide. In the process of pushing the pressure relief plate 13 to slide, the high pressure gas will also push the pressure relief plate 13 to rotate around the rotation center of the hinge 112. In the initial stage of sliding, the pressure relief plate 13 will increase the distance between it and the switchgear body 12, and some of the high pressure gas will be discharged through this distance to achieve pre-pressure relief. As the pressure relief plate 13 rotates rapidly, the flow area of ​​the pressure relief pipe 14 will increase rapidly, forming a smooth and gradual pressure relief process. This reduces the impact force of high-pressure gas. At the same time, the combined action of sliding and rotation disperses the concentrated impact on the hinge 112, reduces the stress load on the hinge 112, and effectively prevents the hinge 112 from deforming due to excessive instantaneous impact force, thus hindering the smooth rotation of the pressure relief plate 13 at a large angle, and achieving stable and reliable pressure relief protection. Secondly, when the pressure relief plate 13 rotates, it drives the inclined extrusion block 223 to rotate. As the inclined extrusion block 223 continues to rotate, its inclined surface contacts the inclined surface of the inclined spring rod 222. The inclined extrusion block 223 then squeezes the inclined spring rod 222 to move, causing the two inclined spring rods 222 to accumulate rebound force and move away from each other. When the inclined extrusion block 223 continues to rotate, it separates from the inclined spring rod 222. At this time, the rebound force of the inclined spring rod 222 is released, causing the two inclined spring rods 222 to stick together. When the impact force of the high-pressure gas in the pressure relief pipe 14 on the pressure relief plate 13 weakens, the inclined spring rod 222 will prevent the inclined extrusion block 223 from descending, thereby preventing the pressure relief plate 13 from returning to its original position. Figure 10 As shown, this effectively prevents large fluctuations in the gas pressure inside the switch cabinet body 12. When the gas pressure inside the switch cabinet body 12 decreases, the pressure relief plate 13 will rotate in the opposite direction for a certain distance due to its own weight. When the gas pressure inside the switch cabinet body 12 increases again, the high-pressure gas will impact the pressure relief plate 13 again, which may cause the pressure relief plate 13 to be impacted multiple times. Secondly, when the pressure relief plate 13 slides and increases the distance between itself and the switch cabinet body 12, some high-pressure gas will be discharged from the left and right sides of the pressure relief plate 13. At the same time, when the pressure relief plate 13 and the sliding plate 111 slide, the sliding plate 111 will drive the connecting rod 322 to move, and the connecting rod 322 will push the connecting block 321 to rotate, thereby driving the guide plate 312 to rotate. Some high-pressure gas will also act on the guide plate 312, increasing the rotational resistance of the guide plate 312, and thus increasing the sliding resistance of the pressure relief plate 13 and the sliding plate 111. This effectively prevents the pressure relief plate 13 from generating a large eccentric inertial force when it rotates rapidly, which would cause the sliding plate 111 to slide rapidly and hit the fixed frame 211, thereby generating a strong reaction force and causing the sliding plate 111 to vibrate, which in turn causes the hinge 112 and the pressure relief plate 13 to vibrate, thereby further reducing the impact on the hinge 112. Secondly, the inclined extrusion block 223 is difficult to descend due to the obstruction of the inclined spring rod 222, which will keep the pressure relief plate 13 in a normally open state. This will increase the heat dissipation area inside the switch cabinet body 12, making it easier for the temperature inside the switch cabinet body 12 to dissipate quickly after the arc is extinguished, reducing structural thermal stress damage to the switch cabinet body 12 and extending the equipment life. In addition, the high-pressure gas is allowed to flow along the inclined direction of the guide plate 312 by the guide plate 312, thereby controlling the flow direction of the high-pressure gas flow and effectively preventing turbulence from forming when the high-pressure gas is discharged from the left and right sides of the pressure relief plate 13. Turbulence will impact adjacent equipment. Once the arc is extinguished within the switchgear body 12, the construction personnel can perform maintenance on the switchgear body 12. After the maintenance is completed, the construction personnel pull the two inclined spring rods 222 to separate them, then push the pressure relief plate 13 to rotate back to its original position, and then push the pressure relief plate 13 to slide back to its original position. Finally, the pressure relief plate 13 is fixed again with nylon bolts.

[0034] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A metal-armored switchgear with internal arc protection, comprising a switchgear body (12), wherein four pressure relief plates (13) are fixedly connected to the back of the outer wall of the switchgear body (12) by nylon bolts, and four pressure relief pipes (14) are connected through the back of the inner wall of the switchgear body (12), characterized in that, Also includes: The main body (1) is slidably disposed on the inner wall of the switch cabinet body (12); Limiting mechanism (2), the limiting mechanism (2) is fixedly installed on the back of the outer wall of the switch cabinet body (12); The flow diversion mechanism (3) is fixedly installed on the back of the outer wall of the switch cabinet body (12); When in use, when an electric arc is generated inside the switch cabinet body (12), the air in the chamber is rapidly heated by the high temperature generated by the electric arc, causing the gas pressure in the chamber to rise rapidly. The high-pressure gas will then flow through the pressure relief pipe (14) and push open the pressure relief plate (13) to allow the high-pressure gas to be discharged quickly.

2. A metal-armored switchgear with internal arc protection as described in claim 1, characterized in that: The main body (1) includes: Mounting assembly (11), which is slidably disposed on the inner wall of the switch cabinet body (12); The mounting component (11) is used to mount the pressure relief plate (13) so that the pressure relief plate (13) can rotate when the high-pressure gas impacts the pressure relief plate (13).

3. A metal-clad switchgear with internal arc protection according to claim 2, characterized in that: The limiting mechanism (2) includes: A sliding assembly (21) is fixedly mounted on the back of the outer wall of the switch cabinet body (12); A blocking component (22) is fixedly disposed on top of the mounting component (11).

4. A metal-armored switchgear with internal arc protection according to claim 3, characterized in that: The drainage mechanism (3) includes: A flow guiding component (31) is fixedly installed on the back of the outer wall of the switch cabinet body (12); A pushing component (32) is fixedly disposed on top of the flow guiding component (31).

5. A metal-armored switchgear with internal arc protection according to claim 4, characterized in that: The installation assembly (11) includes four sliding grooves opened on the side of the switch cabinet body (12) near the pressure relief plate (13), and the inner walls of the four sliding grooves are slidably connected with sliding plates (111).

6. A metal-armored switchgear with internal arc protection according to claim 5, characterized in that: The mounting assembly (11) also includes two hinges (112) fixedly connected to the side of the sliding plate (111) near the pressure relief plate (13), the eight hinges (112) are in pairs, and the side of the four pressure relief plates (13) near the sliding plate (111) is fixedly connected to the side of the four sets of hinges (112) away from the sliding plate (111). When the high-pressure gas in the pressure relief pipe (14) acts on the pressure relief plate (13), the pressure relief plate (13) will rotate rapidly through the hinge (112), fully exposing the pressure relief pipe (14).

7. A metal-armored switchgear with internal arc protection according to claim 5, characterized in that: The sliding assembly (21) includes eight fixed frames (211) fixedly connected to the side of the switch cabinet body (12) near the pressure relief plate (13). Two limiting rods (212) are fixedly connected to the side of each of the four sliding plates (111) near the pressure relief plate (13), and the inner walls of the eight fixed frames (211) are slidably connected to the outer walls of the eight limiting rods (212). When the high-pressure gas acts on the pressure relief plate (13), it will push the pressure relief plate (13) and the sliding plate (111) to slide, increasing the distance between the pressure relief plate (13) and the back of the switch cabinet body (12).

8. A metal-armored switchgear with internal arc protection according to claim 7, characterized in that: The blocking assembly (22) includes a connecting frame (221) fixedly connected to the top of the outer wall of the sliding plate (111). The outer walls of the four connecting frames (221) are slidably connected to the inner walls of the four sliding grooves. The inner walls of the four connecting frames (221) each have two sliding holes. The inner walls of the eight sliding holes are all slidably connected with inclined spring rods (222), and the four pressure relief plates (13) are all fixedly connected with inclined extrusion blocks (223) on the side away from the switch cabinet body (12). When the pressure relief plate (13) rotates due to the impact of high-pressure gas, it will drive the inclined extrusion block (223) to rotate. The inclined extrusion block (223) will squeeze the inclined spring rod (222), causing the two inclined spring rods (222) to move away from each other.

9. A metal-armored switchgear with internal arc protection according to claim 5, characterized in that: The flow guiding assembly (31) includes eight fixed brackets (311) fixedly connected to the side of the switch cabinet body (12) near the pressure relief plate (13), and the inner walls of the eight fixed brackets (311) are rotatably connected to the flow guiding plate (312). When the pressure relief plate (13) slides due to the impact of high-pressure gas, the high-pressure gas in the pressure relief pipe (14) rushes outward and can be guided by the flow guide plate (312).

10. A metal-clad switchgear with internal arc protection according to claim 9, characterized in that: The push assembly (32) includes a connecting block (321) fixedly connected to the top of the outer wall of the guide plate (312), and two connecting rods (322) are fixedly connected to the side of each of the four sliding plates (111) near the pressure relief plate (13). The inner walls of the eight connecting blocks (321) are provided with sliding grooves, and the inner walls of the eight sliding grooves are slidably connected to the outer walls of the eight connecting rods (322). When the sliding plate (111) moves, it will drive the connecting rod (322) to move. The connecting rod (322) will push the connecting block (321) to rotate, thereby driving the guide plate (312) to rotate.

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