An intelligent pressure relief device for power distribution cabinet based on arc reduction

Abstract

This invention provides an intelligent pressure relief device for power distribution cabinets based on arc suppression, belonging to the field of power distribution cabinet pressure relief devices. It includes a cabinet body and a cabinet door. The cabinet door is rotatably connected to the side wall of the cabinet body via multiple hinges. An outer shell is fixedly connected to the outer wall of the cabinet body, and a baffle is provided on the outer wall of the outer shell. A pressure relief port is provided on the side wall of the cabinet body, and a sealing plate is provided on the outer wall of the cabinet body. It also includes: an auxiliary component located inside the outer shell, used to prevent high pressure from forming inside the cabinet and to cool the cabinet; a trigger component located below the auxiliary component, used to prevent open flames from forming inside the cabinet; and a reinforcement component located inside the cabinet body, used to improve the stability of the cabinet door. This invention, through the pushing of the sealing plate, drives the fixed rod to move, causing the end of the lever to press against the push plate, allowing carbon dioxide to be injected into the interior of the cabinet, reducing the possibility of open flames.

Description

Technical Field

[0001] This invention relates to the field of pressure relief devices for distribution cabinets, and more specifically, to an intelligent pressure relief device for distribution cabinets based on arc reduction. Background Technology

[0002] The electrical cabinet needs a pressure relief device primarily to cope with potential sudden high-voltage situations inside. This design is a crucial component of the electrical safety protection system. When a short circuit or arcing fault occurs in the distribution cabinet, the enormous energy released instantaneously generates a large amount of heat and gas within the confined space. If this high pressure is not released in time, it may trigger a series of chain reactions: First, the rapidly increasing internal pressure will exert enormous stress on the cabinet structure, potentially causing sheet metal deformation, weld cracking, or even cabinet explosion, resulting in permanent equipment damage; second, when the pressure exceeds the cabinet's withstand limit, high-temperature gas will erupt at high speed from weak points such as door seams and wiring holes, potentially igniting surrounding equipment and causing serious injury to nearby personnel.

[0003] In the event of a short circuit or arcing fault in a distribution cabinet, the internal pressure will surge and extremely high temperatures will be generated. Such a high-temperature environment can trigger multiple dangerous effects: First, the high temperature will cause the cable insulation layer to rapidly pyrolyze, releasing flammable gases; second, other plastic components inside the cabinet (such as circuit breaker housings, terminals, etc.) will also melt and participate in the combustion. This combustion process is self-sustaining, meaning that once it starts, it will continuously release heat, forming a thermal feedback loop. The incomplete combustion of these organic materials will produce a large amount of toxic fumes and corrosive gases. These harmful substances will not only reduce visibility and hinder personnel escape, but also cause chemical burns to the respiratory tract.

[0004] How to invent an intelligent pressure relief device for distribution cabinets based on arc reduction to improve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] To overcome the above deficiencies, the present invention provides an intelligent pressure relief device for power distribution cabinets based on arc reduction, which aims to improve the problems mentioned in the background.

[0006] This invention is implemented as follows:

[0007] This invention provides an intelligent pressure relief device for a power distribution cabinet based on arc reduction, comprising a cabinet body and a cabinet door. The cabinet door is rotatably connected to the side wall of the cabinet body via multiple hinges. An outer shell is fixedly connected to the outer wall of the cabinet body, and a baffle is provided on the outer wall of the outer shell. A pressure relief port is provided on the side wall of the cabinet body, and a sealing plate is provided on the outer wall of the cabinet body to seal the pressure relief port. The device further includes: an auxiliary component located inside the outer shell, used to prevent high pressure from forming inside the cabinet and to cool the cabinet; a trigger component located below the auxiliary component, used to prevent open flames from forming inside the cabinet; and a reinforcement component located inside the cabinet, used to improve the stability of the cabinet door.

[0008] Preferably, the auxiliary component includes multiple cooling pipes fixedly connected to the inner wall of the housing. A push rod is slidably connected to the end of each cooling pipe, and the end of the push rod is fixedly connected to a sealing plate. A return spring is sleeved on each cooling pipe, with one end of the return spring fixedly connected to the sealing plate and the other end fixedly connected to the end of the cooling pipe. A sealing ring is fixedly connected to the inner wall of the cooling pipe. A flow divider is fixedly connected to the end of the push rod, and the flow divider is slidably disposed with the inner wall of the cooling pipe. A sealing plate is sleeved on the push rod, and the sealing plate is fitted against the flow divider. A first spring is fixedly connected to the side wall of the sealing plate, and the end of the first spring away from the sealing plate is fixedly connected to the push rod.

[0009] Preferably, the cooling pipe is filled with coolant, and a return pipe and an inlet pipe are connected to the top of the cooling pipe. The return pipe and the inlet pipe are located on both sides of the distributor seat. A plurality of dispersion pipes are connected to the bottom of the cooling pipe. The two ends of the dispersion pipes are located on both sides of the distributor seat. The cooling pipe is connected to an external cooling mechanism through the return pipe and the inlet pipe.

[0010] Preferably, the diversion seat has multiple diversion holes, the sealing plate blocks the multiple diversion holes, the sealing plate does not block all the diversion holes, and the sealing plate has multiple ventilation holes.

[0011] Preferably, the triggering component includes a fixed rod fixedly connected to the sealing plate, a lever rotatably connected to the fixed rod, a support shaft rotatably connected to the side wall of the housing, the lever passing through the support shaft, the lever slidingly disposed with the support shaft, the end of the fixed rod being fixedly connected to a baffle, an air outlet being provided on the housing, and the baffle blocking the air outlet.

[0012] Preferably, a gas tank is fixedly connected to the inner wall of the outer shell, the gas tank contains liquid carbon dioxide, a vent valve is fixedly connected to the top of the gas tank, the vent valve contains a first chamber and a second chamber, a valve stem is slidably connected to the side wall of the vent valve, a valve is fixedly connected to one end of the valve stem, a push plate is fixedly connected to the other end of the valve stem, and a second spring is sleeved on the valve stem, the second spring being located between the vent valve and the push plate.

[0013] Preferably, the vent valve is connected to an air outlet pipe, which is connected to the interior of the cabinet.

[0014] Preferably, the reinforcement component includes a liner frame fixedly connected to the inner side wall of the cabinet door, a buffer plate slidably disposed inside the liner frame, and a plurality of third springs fixedly connected to the side wall of the buffer plate, the ends of the third springs being fixedly connected to the inner side wall of the cabinet door.

[0015] Preferably, the edge of the buffer plate is provided with a slope, and a plurality of slide blocks are fixedly connected to the slope. A slider is slidably arranged on the inner side of the slide block, and a slide rod is fixedly connected to the slider.

[0016] Preferably, the cabinet body is provided with fixing holes, the number of fixing holes being the same as the number of slide rods, and the end of the slide rod that passes through the liner frame is located between the liner frame and the cabinet body.

[0017] The beneficial effects of this invention are as follows: the force exerted by the high-temperature airflow on the sealing plate causes the sealing plate and baffle to move, allowing the increased pressure inside the cabinet to be released into the external environment. At the same time, the sealing plate, driven by the high-temperature airflow, also moves the fixing rod, causing the end of the lever to press against the push plate, thus injecting carbon dioxide into the interior of the cabinet. This reduces the possibility of open flames. Furthermore, the vaporization of carbon dioxide causes the temperature inside the cabinet to drop rapidly, thereby hindering the maintenance and development of the electric arc channel, shortening the distance of the electric arc overflow, and reducing the possibility of the electric arc damaging other electrical 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 embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of an intelligent pressure relief device for a power distribution cabinet based on arc reduction, provided by an embodiment of the present invention.

[0020] Figure 2This is a schematic diagram of the internal structure of the housing of an intelligent pressure relief device for a power distribution cabinet based on arc reduction, provided by an embodiment of the present invention.

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the sealing plate structure of an intelligent pressure relief device for a power distribution cabinet based on arc reduction, provided by an embodiment of the present invention.

[0023] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0024] Figure 6 This is a schematic diagram of the gas tank location of an intelligent pressure relief device for a power distribution cabinet based on arc reduction, provided by an embodiment of the present invention.

[0025] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0026] Figure 8 This is a schematic diagram of the liner structure of an intelligent pressure relief device for a power distribution cabinet based on arc reduction, provided by an embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram of the buffer plate structure of an intelligent pressure relief device for a power distribution cabinet based on arc reduction, provided by an embodiment of the present invention.

[0028] Figure 10 yes Figure 9 Enlarged view of point D in the middle.

[0029] In the diagram: 1. Cabinet body; 2. Cabinet door; 3. Outer shell; 4. Baffle; 5. Pressure relief port; 6. Sealing plate; 7. Cooling pipe; 11. Push rod; 13. Return spring; 14. Sealing ring; 15. Diverter seat; 16. Sealing plate; 17. First spring; 18. Return pipe; 19. Inlet pipe; 20. Dispersion pipe; 21. Diverter hole; 22. Ventilation hole; 31. Fixing rod; 32. Toggle rod; 33. Support shaft; 42. Gas tank; 43. Vent valve; 44. First chamber; 45. Second chamber; 46. Valve; 47. Valve stem; 48. Push plate; 49. Second spring; 50. Vent pipe; 61. Liner frame; 62. Buffer plate; 63. Third spring; 64. Slide seat; 65. Slide rod; 66. Fixing hole; 67. Inclined surface; 68. Slider. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, 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.

[0031] Example, refer to Figures 1-5 An intelligent pressure relief device for a power distribution cabinet based on arc reduction includes a cabinet body 1 and a cabinet door 2. The cabinet door 2 is rotatably connected to the side wall of the cabinet body 1 via multiple hinges. An outer shell 3 is fixedly connected to the outer wall of the cabinet body 1. A baffle 4 is provided on the outer wall of the outer shell 3. A pressure relief port 5 is opened on the side wall of the cabinet body 1. A sealing plate 6 is provided on the outer wall of the cabinet body 1 to block the pressure relief port 5. The device also includes: an auxiliary component, which is located inside the outer shell 3 and is used to prevent high pressure from being generated inside the cabinet body 1 and to cool the cabinet body 1; an activation component, which is located below the auxiliary component and is used to prevent open flame from being generated inside the cabinet body 1; and a reinforcement component, which is located inside the cabinet body 1 and is used to improve the stability of the cabinet door 2.

[0032] The auxiliary components include multiple cooling pipes 7 fixedly connected to the inner wall of the housing 3. A push rod 11 is slidably connected to the end of the cooling pipe 7. The end of the push rod 11 is fixedly connected to the sealing plate 6. A return spring 13 is sleeved on the cooling pipe 7. One end of the return spring 13 is fixedly connected to the sealing plate 6, and the other end is fixedly connected to the end of the cooling pipe 7. A sealing ring 14 is fixedly connected to the inner wall of the cooling pipe 7. A flow divider seat 15 is fixedly connected to the end of the push rod 11. The flow divider seat 15 is slidably disposed with the inner wall of the cooling pipe 7. A sealing plate 16 is sleeved on the push rod 11. The sealing plate 16 is fitted with the flow divider seat 15. A first spring 17 is fixedly connected to the side wall of the sealing plate 16. The end of the first spring 17 away from the sealing plate 16 is fixedly connected to the push rod 11.

[0033] Cooling pipe 7 contains coolant. The top of cooling pipe 7 is connected to a return pipe 18 and an inlet pipe 19, which are located on both sides of the distributor seat 15. The bottom of cooling pipe 7 is connected to multiple distribution pipes 20, with both ends of the distribution pipes 20 located on both sides of the distributor seat 15. Cooling pipe 7 is connected to an external cooling mechanism through the return pipe 18 and the inlet pipe 19. Multiple distribution holes 21 are provided on the distributor seat 15. The sealing plate 16 is used to seal the multiple distribution holes 21, but the sealing plate 16 does not seal all the distribution holes 21. Multiple ventilation holes 22 are provided on the sealing plate 6.

[0034] It should be noted that since various switches and electrical appliances will be installed inside the cabinet 1, these switches and electrical appliances will generate heat during use. By setting up cooling pipe 7, the coolant is delivered into the inlet pipe 19 through the external cooling mechanism, passes through multiple distribution pipes 20, and flows back from the return pipe 18. During this process, the external cooling mechanism continuously cools the coolant and exchanges heat with the air inside the outer shell 3 through the multiple distribution pipes 20, thus cooling the inside of the outer shell 3. The cooled air exchanges with the air inside the cabinet 1 through the ventilation hole 22, thus cooling the air inside the cabinet 1 and preventing the temperature inside the cabinet 1 from continuously rising, which would accelerate the aging of electrical appliances.

[0035] When the internal temperature and air pressure of the distribution cabinet increase due to an arc fault, the airflow pushes the sealing plate 6, overcoming the elasticity of the return spring 13, and pushes the sealing plate 6 away from the cabinet body 1. This prevents the sealing plate 6 from blocking the pressure relief port 5. The sealing plate 6 also pushes the baffle 4 away from the outer shell 3 through the fixing rod 31, allowing the increased pressure inside the cabinet body 1 to be released into the external environment. This prevents the high-temperature airflow from impacting the cabinet body 1 and causing damage to it. It also keeps the direction of the high-temperature airflow under control, which helps to improve the safety of the distribution cabinet.

[0036] Reference Figures 6-7 The triggering component includes a fixed rod 31 fixedly connected to the sealing plate 6, a lever 32 rotatably connected to the fixed rod 31, a support shaft 33 rotatably connected to the side wall of the outer casing 3, the lever 32 passing through the support shaft 33, and the lever 32 slidingly disposed with the support shaft 33. The end of the fixed rod 31 is fixedly connected to the baffle 4. The outer casing 3 is provided with an air outlet, and the baffle 4 is provided to block the air outlet. A gas tank 42 is fixedly connected to the inner side wall of the outer casing 3, and the gas tank 42 is filled with liquid carbon dioxide. A vent valve 43 is fixedly connected to the top of the tank 42. The vent valve 43 has a first chamber 44 and a second chamber 45. A valve stem 47 is slidably connected to the side wall of the vent valve 43. A valve 46 is fixedly connected to one end of the valve stem 47, and a push plate 48 is fixedly connected to the other end. A second spring 49 is sleeved on the valve stem 47. The second spring 49 is located between the vent valve 43 and the push plate 48. An air outlet pipe 50 is connected to the vent valve 43 and is connected to the interior of the cabinet 1.

[0037] It should be noted that, due to the rapid increase in internal temperature caused by an electric arc fault, the electrical components inside the distribution cabinet are prone to combustion. Under the influence of the high-temperature airflow, the sealing plate 6 moves the fixing rod 31, which in turn rotates the lever 32 on the support shaft 33. This causes the end of the lever 32 to press against the push plate 48. The push plate 48 overcomes the elastic force of the second spring 49, moving the valve stem 47 and the valve 46, thus opening the valve 46 and connecting the inside of the gas tank 42 with the external environment. The liquid carbon dioxide inside the gas tank 42 vaporizes due to the reduced pressure. The carbon dioxide is injected into the cabinet 1 through the first chamber 44, the second chamber 45, and the outlet pipe 50, creating an oxygen-deficient environment inside the cabinet 1. This prevents the temperature from rising and causing electrical appliances to burn. The carbon dioxide also absorbs a large amount of heat during vaporization, causing the temperature inside the cabinet 1 to drop rapidly. This rapid cooling effectively reduces the heat energy in the arc area, making it difficult for gas molecules to be ionized. This hinders the maintenance and development of the arc channel, shortens the distance of arc overflow, and reduces the possibility of the arc breaking down other electrical equipment.

[0038] Driven by the high-temperature airflow, the sealing plate 6 also moves the push rod 11, causing the flow divider 15 to move towards the return pipe 18. This allows the coolant located between the flow divider 15 and the return pipe 18 to move through multiple flow dividers 21 to the other side of the flow divider 15. During this process, the coolant pushes the sealing plate 16 to overcome the elastic force of the first spring 17, causing the sealing plate 16 to release the sealing state of the flow dividers 21. When the pushing force of the high-temperature airflow disappears, under the elastic force of the return spring 13, the push rod 11 moves the flow divider 15 towards the inlet pipe 19, allowing the coolant located between the flow divider 15 and the return pipe 18 to move through multiple flow dividers 21 to the other side of the flow divider 15. The coolant between 19 and the distributor 15 moves to the other side of the distributor 15. During this process, the sealing plate 16 is squeezed by the coolant and continuously blocks part of the distributor hole 21, reducing the flow rate of coolant flowing towards the return pipe 18. This makes the speed at which the distributor 15 moves towards the inlet pipe 19 slower than the speed at which the distributor 15 moves towards the return pipe 18. This increases the time that the end of the lever 32 squeezes the push plate 48, increases the time for carbon dioxide to be injected into the cabinet 1, reduces the possibility of subsequent combustion, and continuously lowers the temperature inside the cabinet 1, thus suppressing the distance of arc overflow.

[0039] Reference Figures 8-10The reinforcement component includes a liner 61 fixedly connected to the inner side wall of the cabinet door 2. A buffer plate 62 is slidably disposed inside the liner 61. Multiple third springs 63 are fixedly connected to the side wall of the buffer plate 62. The ends of the third springs 63 are fixedly connected to the inner side wall of the cabinet door 2. The edge of the buffer plate 62 is provided with a bevel 67. Multiple slide blocks 64 are fixedly connected to the bevel 67. A slider 68 is slidably disposed inside the slide block 64. A slide rod 65 is fixedly connected to the slider 68. The cabinet body 1 is provided with fixing holes 66. The number of fixing holes 66 is the same as the number of slide rods 65. The end of the slide rod 65 that passes through the liner 61 is located between the liner 61 and the cabinet body 1.

[0040] It should be noted that, by setting up the reinforcement components, when the buffer plate 62 is impacted by the high-pressure airflow, it overcomes the elastic force of the third spring 63 and moves towards the cabinet door 2, driving the slide block 64 to move. The inclined surface 67 squeezes the slider 68, causing the slider 68 and the slide rod 65 to move towards the fixing hole 66, so that the slide rod 65 is inserted into the fixing hole 66. This reinforces the cabinet door 2 and the cabinet body 1 through the liner 61, preventing the high-pressure airflow from directly impacting the cabinet door 2, causing the cabinet door 2 to open quickly and causing injury to surrounding personnel. When the buffer plate 62 is no longer impacted by the airflow, the buffer plate 62 is moved away from the cabinet door 2 by the elastic force of the third spring 63, causing the slide rod 65 to be pulled out of the fixing hole 66, no longer blocking the opening of the cabinet door 2, facilitating the maintenance of the inside of the cabinet body 1 by the staff.

[0041] In this embodiment, by setting auxiliary components, cooling pipe 7 and dispersion pipe 20 are used to cool the air inside the outer shell 3 and cabinet 1, so as to prevent the temperature inside the cabinet 1 from rising continuously.

[0042] When the internal temperature and pressure of the distribution cabinet increase due to an arc fault, the airflow pushes against the sealing plate 6, causing the sealing plate 6 and the baffle 4 to move. This allows the increased pressure inside the cabinet 1 to be released into the external environment. At the same time, the sealing plate 6, driven by the high-temperature airflow, also moves the fixing rod 31, causing the end of the lever 32 to press against the push plate 48, injecting carbon dioxide into the cabinet 1. This creates an oxygen-deficient state inside the cabinet 1 due to the carbon dioxide filling. The delayed reset of the diverter seat 15 increases the time that the end of the lever 32 presses against the push plate 48, increasing the injection time of carbon dioxide into the cabinet 1 and reducing the possibility of open flame. The vaporization of carbon dioxide also causes the temperature inside the cabinet 1 to drop rapidly, thereby hindering the maintenance and development of the arc channel, shortening the arc overflow distance, and reducing the possibility of the arc breaking down other electrical equipment.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A smart pressure relief device for a distribution cabinet based on arc reduction, comprising a cabinet body (1) and a cabinet door (2), wherein the cabinet door (2) is rotatably connected to the side wall of the cabinet body (1) via multiple hinges, a shell (3) is fixedly connected to the outer side wall of the cabinet body (1), a baffle (4) is provided on the outer side wall of the shell (3), a pressure relief port (5) is provided on the side wall of the cabinet body (1), and a sealing plate (6) is provided on the outer side wall of the cabinet body (1), wherein the sealing plate (6) is used to seal the pressure relief port (5), characterized in that, Also includes: An auxiliary component is disposed on the inside of the outer shell (3) and is used to prevent high pressure from being generated inside the cabinet (1) and to cool down the cabinet (1). A triggering component is disposed below the auxiliary component, and the triggering component is used to prevent open flames from being generated inside the cabinet (1); A reinforcing component is disposed on the inner side of the cabinet (1) and is used to improve the stability of the cabinet door (2). The auxiliary components include multiple cooling pipes (7) fixedly connected to the inner wall of the outer casing (3). A push rod (11) is slidably connected to the end of each cooling pipe (7). The end of the push rod (11) is fixedly connected to a sealing plate (6). A return spring (13) is sleeved on each cooling pipe (7). One end of the return spring (13) is fixedly connected to the sealing plate (6), and the other end is fixedly connected to the end of the cooling pipe (7). A sealing ring (14) is fixedly connected to the inner wall of the cooling pipe (7). A flow divider seat (15) is fixedly connected to the end of the push rod (11). The flow divider seat (15) is slidably disposed with the inner wall of the cooling pipe (7). A sealing plate (16) is sleeved on the push rod (11). The sealing plate (16) is fitted with the flow divider seat (15). A first spring (17) is fixedly connected to the side wall of the sealing plate (16). The end of the first spring (17) away from the sealing plate (16) is fixedly connected to the push rod (11). The triggering component includes a fixed rod (31) fixedly connected to the sealing plate (6), a lever (32) rotatably connected to the fixed rod (31), a support shaft (33) rotatably connected to the side wall of the outer shell (3), the lever (32) passing through the support shaft (33), the lever (32) slidingly connected to the support shaft (33), the end of the fixed rod (31) fixedly connected to the baffle (4), an air outlet provided on the outer shell (3), and the baffle (4) blocking the air outlet.

2. The intelligent pressure relief device for a distribution cabinet based on arc reduction according to claim 1, characterized in that, The cooling pipe (7) is filled with coolant. The top of the cooling pipe (7) is connected to a return pipe (18) and an inlet pipe (19). The return pipe (18) and the inlet pipe (19) are located on both sides of the distributor seat (15). The bottom of the cooling pipe (7) is connected to a plurality of dispersion pipes (20). The two ends of the dispersion pipes (20) are located on both sides of the distributor seat (15). The cooling pipe (7) is connected to an external cooling mechanism through the return pipe (18) and the inlet pipe (19).

3. The intelligent pressure relief device for a distribution cabinet based on arc reduction according to claim 1, characterized in that, The diversion seat (15) has multiple diversion holes (21), the sealing plate (16) is used to block the multiple diversion holes (21), the sealing plate (16) does not block all the diversion holes (21), and the sealing plate (6) has multiple ventilation holes (22).

4. The intelligent pressure relief device for a distribution cabinet based on arc reduction according to claim 1, characterized in that, A gas tank (42) is fixedly connected to the inner wall of the outer shell (3). Liquid carbon dioxide is provided inside the gas tank (42). A vent valve (43) is fixedly connected to the top of the gas tank (42). A first chamber (44) and a second chamber (45) are provided inside the vent valve (43). A valve stem (47) is slidably connected to the side wall of the vent valve (43). A valve (46) is fixedly connected to one end of the valve stem (47), and a push plate (48) is fixedly connected to the other end. A second spring (49) is sleeved on the valve stem (47). The second spring (49) is located between the vent valve (43) and the push plate (48).

5. The intelligent pressure relief device for a distribution cabinet based on arc reduction according to claim 4, characterized in that, The vent valve (43) is connected to an air outlet pipe (50), which is connected to the interior of the cabinet (1).

6. The intelligent pressure relief device for a distribution cabinet based on arc reduction according to claim 1, characterized in that, The reinforcement component includes a liner (61) fixedly connected to the inner wall of the cabinet door (2), a buffer plate (62) is slidably disposed inside the liner (61), and a plurality of third springs (63) are fixedly connected to the side wall of the buffer plate (62), with the ends of the third springs (63) fixedly connected to the inner wall of the cabinet door (2).

7. The intelligent pressure relief device for a distribution cabinet based on arc reduction according to claim 6, characterized in that, The edge of the buffer plate (62) is provided with a slope (67), and a plurality of slide blocks (64) are fixedly connected to the slope (67). A slider (68) is slidably provided on the inner side of the slide block (64), and a slide rod (65) is fixedly connected to the slider (68).

8. The intelligent pressure relief device for a distribution cabinet based on arc reduction according to claim 7, characterized in that, The cabinet (1) is provided with fixing holes (66), the number of fixing holes (66) is the same as the number of slide rods (65), and the end of the slide rod (65) that passes through the liner (61) is located between the liner (61) and the cabinet (1).

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