Multi-level protection type intelligent switchgear

Abstract

The application discloses a multi-grade protection type intelligent switch device, and relates to the field of switch devices, which solves the problem that the existing switch device is difficult to timely release pressure, and comprises a device shell and a mounting frame mounted on the outer side of the device shell, a ventilation box is mounted on the inner side of the mounting frame, a ventilation plate is slidably mounted on the inner side of the ventilation box, a plurality of first ventilation holes are formed in the two sides of the ventilation box, and a plurality of second ventilation holes are formed in the outer side of the ventilation plate; the device further comprises a pressure release mechanism for timely releasing pressure of the device shell, which is mounted on the inner side of the ventilation box; through the pressure release mechanism, when the air pressure in the device shell increases, the ventilation plate moves downwards, the second ventilation holes on the ventilation plate and the first ventilation holes on the ventilation box can gradually approach each other, high-temperature gas in the device shell can be gradually discharged from the first ventilation holes and the second ventilation holes, the safety during pressure release is improved, and the effect of timely pressure release is achieved.

Description

Technical Field

[0001] This invention relates to the field of switchgear, specifically to a multi-level protection type intelligent switchgear. Background Technology

[0002] Switchgear is a device used to control, protect, and isolate electrical equipment in a power system. It is widely used in power generation, transmission, distribution, and consumption. Common switchgear includes circuit breakers, disconnect switches, load switches, and fuses.

[0003] Multi-level protection switchgear refers to a combination of switchgear that works collaboratively through multiple protection mechanisms to achieve precise isolation and protection against faults at different levels in the power system. Its core objective is to improve system reliability, selectivity, and safety, and to ensure that the impact of faults is minimized. When a short-circuit fault occurs in existing switchgear, the tens of thousands of amperes of short-circuit current will instantly generate high-temperature and high-pressure gas. If the expanding gas cannot be released quickly, it will cause the switchgear to explode internally. Existing switchgear will install two elastic guide baffles on its outside and use electromagnets for attraction and positioning. Although this can achieve rapid gas depressurization, the electromagnets can only release the elastic guide baffles after being de-energized. If the power cannot be de-energized in time, depressurization cannot be carried out in time, resulting in low safety. Furthermore, the thrust of the gas during depressurization is large, which can easily cause the elastic guide baffles to directly hit the depressurization port and be damaged, making it difficult to automatically reset. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-level protection intelligent switchgear to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A multi-level protection intelligent switchgear includes: a device housing and a mounting frame fixedly installed on the outside of the device housing; a vent box fixedly installed on the inner side of the mounting frame; a vent plate slidably installed on the inner side of the vent box; a plurality of first vent holes evenly distributed on the outer side of the vent box; and a plurality of second vent holes evenly distributed on the outer side of the vent plate. The switchgear also includes: a pressure relief mechanism for timely pressure relief of the device housing, the pressure relief mechanism being installed on the inner side of the vent box; a fixing plate mechanism for positioning and pressure relief of the vent plate, the fixing plate mechanism being installed on the top of the vent plate; and a gas guiding mechanism for safely discharging high-temperature gas from inside the device housing, the gas guiding mechanism being installed on the outer side of the vent box.

[0007] Preferably, the pressure relief mechanism includes two mounting rods symmetrically fixedly installed at the bottom of the ventilated plate, a push frame fixedly installed between the two mounting rods, a telescopic airbag fixedly installed on the bottom inner wall of the ventilated box, the top of the telescopic airbag being fixedly connected to the bottom of the push frame, a square opening located outside the telescopic airbag on the outer side of the ventilated box, two symmetrically distributed positioning slide rods fixedly installed on the inner side of the ventilated box, the positioning slide rods sliding through the ventilated plate, an L-shaped bracket fixedly installed on the outer side of the positioning slide rod, the telescopic airbag being located between the two L-shaped brackets, and a first spring provided on the outer side of the positioning slide rod, the first spring being fixedly installed between the top of the ventilated plate and the top inner wall of the ventilated box.

[0008] Preferably, the fixing plate mechanism includes a top block fixedly installed on the top of the ventilated plate. The top block has an installation cavity on its inner side. A positioning block is slidably installed on the inner side of the installation cavity. A plurality of second springs distributed at equal intervals are fixedly installed between the positioning block and the inner side of the installation cavity. The ventilated box has a slot for the positioning block to be inserted and limited, and the height of the slot is less than the height of the positioning block. Two symmetrically distributed square sleeves are fixedly installed on the side of the positioning block near the second springs. A positioning plate is slidably installed on the inner side of the square sleeves. The bottom of the positioning plate has a sloping structure. Both the ventilated plate and the top block have insertion cavities for the positioning plate to be slidably limited.

[0009] Preferably, the air guiding mechanism includes a sealing plate disposed outside the first vent hole, a rotating rod rotatably mounted on the bottom of the sealing plate, the rotating rod rotatably mounted on the inner side of the vent box, a first gear fixedly mounted at both ends of the rotating rod, a second gear meshing with the first gear rotatably mounted on the inner side of the vent box, a rack plate meshing with the second gear fixedly mounted on the side of the vent plate near the sealing plate, flow guide baffles fixedly mounted on both sides of the sealing plate, and the inner side of the sealing plate has an arc-shaped structure to facilitate the upward discharge of high-temperature hot air, a metal strip fixedly mounted on the side of the sealing plate away from the first vent hole, a baffle strip fixedly mounted on the bottom of the first vent hole, and the baffle strip having a sloping structure on the side near the sealing plate.

[0010] Preferably, a rubber sleeve frame is fixedly installed on the outer side of the mounting frame, and a frame-shaped groove for installing the rubber sleeve frame is provided on the outer side of the equipment housing.

[0011] Preferably, an air injection valve is fixedly installed on the outer side of the telescopic airbag, and the air injection valve extends to the outer side of the ventilated box.

[0012] Preferably, sliding balls are rotatably installed on both sides of the push frame, and a sliding groove is provided on the outer side of the L-shaped bracket for the sliding balls to be limited and slid.

[0013] Preferably, two symmetrically distributed rubber pads are fixedly installed at the bottom of the ventilated plate, and the rubber pads are located directly above the L-shaped bracket.

[0014] Preferably, a guide sleeve plate is fixedly installed on the outer side of the square sleeve frame, and a sliding cavity is opened on the inner side of the mounting cavity of the top block for the guide sleeve plate to slide and be limited, and an optical axis that slides through the guide sleeve plate is fixedly installed on the inner side of the sliding cavity.

[0015] Preferably, two symmetrically distributed pulley rods are fixedly installed on the outer side of the top block, and an elongated groove is provided on the outer side of the vent box for the pulley rods to slide in a limited manner. A ring handle is fixedly installed between the two pulley rods.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention, through a pressure relief mechanism, enables the vent plate to move downwards when the air pressure inside the equipment casing increases. The second vent hole on the vent plate gradually approaches the first vent hole on the vent box, allowing the high-temperature gas inside the equipment casing to gradually escape from the first and second vent holes, thus improving safety during venting and achieving timely venting.

[0018] The present invention, through the fixed plate mechanism, enables the square frame on the positioning block to move away from the positioning plate when the first vent hole and the second vent hole are aligned. The rebound force of the second spring causes the positioning block to be inserted into the slot of the vent box, providing a limit for the movement of the vent plate, ensuring that the first vent hole and the second vent hole are aligned, facilitating rapid air release, and thus improving the air release efficiency.

[0019] This invention, through a gas guiding mechanism, allows the rack plate, in conjunction with the second rack, to drive the first gear to rotate during the movement of the vent plate. The first gear, in turn, drives the sealing plate to swing outward via a rotating rod. The weight of the metal block keeps the sealing plate in an inclined state, providing guidance for the discharge of high-temperature gas. This facilitates the outward discharge of high-temperature gas in an inclined state, thereby achieving the effect of safe gas release. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the mounting frame and rubber sleeve frame structure in this invention;

[0022] Figure 3 This is a schematic diagram of the sealing plate and the vent box structure in this invention;

[0023] Figure 4 for Figure 3 Enlarged structural diagram of area A in the middle;

[0024] Figure 5 This is a schematic diagram of the breathable plate and telescopic airbag structure in this invention;

[0025] Figure 6 This is a schematic diagram of the top block and pulley rod structure in this invention;

[0026] Figure 7 This is a schematic diagram of the positioning block and positioning plate structure in this invention;

[0027] Figure 8 This is a schematic diagram of the guide sleeve and square frame structure in this invention.

[0028] In the diagram: 1. Equipment casing; 2. Mounting frame; 3. Ventilation box; 4. Ventilation plate; 5. First vent; 6. Second vent; 7. Mounting rod; 8. Push frame; 9. Telescopic airbag; 10. Positioning slide rod; 11. L-shaped bracket; 12. First spring; 13. Top block; 14. Positioning block; 15. Second spring; 16. Square sleeve; 17. Positioning plate; 18. Sealing plate; 19. Rotating rod; 20. First gear; 21. Second gear; 22. Rack plate; 23. Guide baffle; 24. Metal strip; 25. Rubber sleeve; 26. Air injection valve; 27. Sliding ball; 28. Rubber pad; 29. ​​Guide sleeve; 30. Optical shaft; 31. Pulley rod; 32. Ring handle; 33. Stop bar. Detailed Implementation

[0029] 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.

[0030] Example 1: Please refer to Figures 1-8The diagram illustrates a multi-level protection intelligent switchgear, comprising a housing 1 and a mounting frame 2 fixedly installed on the outside of the housing 1. A vent box 3 is fixedly installed on the inner side of the mounting frame 2, and a vent plate 4 is slidably installed on the inner side of the vent box 3. Multiple first vent holes 5 are equidistantly distributed on the outer side of the vent box 3, and multiple second vent holes 6 are equidistantly distributed on the outer side of the vent plate 4. When the first vent holes 5 on the vent box 3 and the second vent holes 6 on the vent plate 4 are aligned, air inside the housing 1 is released. The gas can be discharged outward from the first vent 5 and the second vent 6, and when the vent plate 4 moves, the first vent 5 and the second vent 6 can be misaligned to achieve a seal on the vent box 3; it also includes: a pressure relief mechanism for timely pressure relief of the equipment shell 1, the pressure relief mechanism is installed on the inner side of the vent box 3; a fixed plate mechanism for positioning and pressure relief of the vent plate 4, the fixed plate mechanism is installed on the top of the vent plate 4; and a gas guiding mechanism for safely discharging the high-temperature gas inside the equipment shell 1, the gas guiding mechanism is installed on the outer side of the vent box 3.

[0031] The pressure relief mechanism includes two symmetrically fixed mounting rods 7 fixedly installed at the bottom of the vent plate 4. A push frame 8 is fixedly installed between the two mounting rods 7. A telescopic airbag 9 is fixedly installed on the bottom inner wall of the vent box 3. The top of the telescopic airbag 9 is fixedly connected to the bottom of the push frame 8. A square opening is provided on the outside of the vent box 3, located outside the telescopic airbag 9. When the air pressure inside the equipment shell 1 increases, the telescopic airbag 9 can contract accordingly. The telescopic airbag 9 can then pull the push frame 8 downward. The push frame 8 pulls the vent plate 4 to move through the mounting rods 7, causing the second pressure relief mechanism on the vent plate 4 to move downward. Vent hole 6 is close to the first vent hole 5 on the vent box 3, enabling timely pressure relief of the equipment shell 1. Two symmetrically distributed positioning slide rods 10 are fixedly installed on the inner side of the vent box 3. The positioning slide rods 10 slide through the vent plate 4, providing guidance for the movement of the vent plate 4 and improving the stability of its movement. An L-shaped bracket 11 is fixedly installed on the outer side of the positioning slide rod 10. The telescopic airbag 9 is located between the two L-shaped brackets 11, providing guidance for the extension and retraction of the telescopic airbag 9, facilitating the movement of the push frame 8 by the telescopic airbag 9. The outer side of the positioning slide rod 10 is provided with… The first spring 12 is fixedly installed between the top of the vent plate 4 and the top inner wall of the vent box 3, so that when the telescopic airbag 9 contracts, the rebound force of the first spring 12 can be used to make the vent plate 4 move downward quickly. A rubber sleeve frame 25 is fixedly installed on the outside of the mounting frame 2. A frame-shaped groove for installing the rubber sleeve frame 25 is opened on the outside of the equipment shell 1 to improve the sealing between the mounting frame 2 and the equipment shell 1. An air injection valve 26 is fixedly installed on the outside of the telescopic airbag 9. The air injection valve 26 extends to the outside of the vent box 3 to facilitate the passage of personnel. The air injection valve 26 injects gas into the telescopic airbag 9. Sliding balls 27 are rotatably installed on both sides of the push frame 8. The outer side of the L-shaped bracket 11 is provided with a sliding groove for the sliding balls 27 to limit their sliding, which improves the stability of the push frame 8 movement, prevents the push frame 8 from tilting, and reduces the friction between the push frame 8 and the L-shaped bracket 11. Two symmetrically distributed rubber pads 28 are fixedly installed at the bottom of the ventilated plate 4. The rubber pads 28 are located directly above the L-shaped bracket 11, providing a buffer for the downward movement of the ventilated plate 4 and improving the durability of the ventilated plate 4 and the L-shaped bracket 11.

[0032] Example 2: Please refer to Figures 3-8This embodiment further explains Example 1. The fixed plate mechanism shown in the figure includes a top block 13 fixedly installed on the top of the breathable plate 4, so that when the telescopic airbag 9 expands and extends, the top block 13 on the breathable plate 4 can contact the inner top wall of the breathable box 3 to provide protection for the breathable plate 4. An installation cavity is opened on the inner side of the top block 13, and a positioning block 14 is slidably installed on the inner side of the installation cavity. A plurality of second springs 15 are fixedly installed between the positioning block 14 and the inner side of the installation cavity. A slot is opened on the inner side of the breathable box 3 for the positioning block 14 to be inserted and limited, and the height of the slot is less than the height of the positioning block 14. 4. During movement, the top block 13 can drive the positioning block 14 downward. When the positioning block 14 is aligned with the slot, the rebound force of the second spring 15 is used to insert the positioning block 14 into the slot, ensuring that the first vent 5 on the vent box 3 is aligned with the second vent 6 on the vent plate 4, so as to achieve rapid gas discharge. Two symmetrically distributed square frames 16 are fixedly installed on the side of the positioning block 14 near the second spring 15. A positioning plate 17 is slidably installed on the inner side of the square frame 16. The bottom of the positioning plate 17 has a sloping structure. When the vent plate 4 moves downward, the square frame 16 can move along the outer side of the positioning plate 17. As the vent plate 4 moves downwards and the positioning block 14 aligns with the slot, the square frame 16 moves away from the positioning plate 17, allowing the positioning block 14 to insert into the slot. When the vent plate 4 moves upwards, the inner side of the square frame 16 contacts the inclined surface at the bottom of the positioning plate 17. Utilizing the reaction force of the positioning plate 17 on the square frame 16, the square frame 16 pulls the positioning block 14 into the mounting cavity, thus retrieving the positioning block 14 and preventing it from pressing against the inner side of the vent box 3, ensuring the normal reset of the vent plate 4. Both the vent plate 4 and the top block 13 have cavities on their inner sides for the positioning plate 17 to slide and limit the movement of the square frame 16. A guide sleeve 29 is fixedly installed on the outer side. A sliding cavity for limiting the sliding of the guide sleeve 29 is opened on the inner side of the mounting cavity of the top block 13. An optical axis 30 that slides through the guide sleeve 29 is fixedly installed on the inner side of the sliding cavity to provide guidance for the movement of the positioning block 14 and prevent the positioning block 14 from tilting when moving. Two symmetrically distributed pulley rods 31 are fixedly installed on the outer side of the top block 13. A long groove for limiting the sliding of the pulley rods 31 is opened on the outer side of the vent box 3. A ring handle 32 is fixedly installed between the two pulley rods 31 to facilitate manually resetting the vent plate 4 upward and to facilitate replenishing gas in the telescopic airbag 9.

[0033] Example 3: Please refer to Figure 3 and Figure 4This embodiment further illustrates other embodiments. The air guiding mechanism shown in the figure includes a sealing plate 18 disposed outside the first vent hole 5. A rotating rod 19 is rotatably mounted on the bottom of the sealing plate 18. The rotating rod 19 is rotatably mounted inside the vent box 3. A first gear 20 is fixedly mounted on both ends of the rotating rod 19. A second gear 21 that meshes with the first gear 20 is rotatably mounted on the inner side of the vent box 3. A rack plate 22 that meshes with the second gear 21 is fixedly mounted on the side of the vent plate 4 near the sealing plate 18. When the vent plate 4 moves downward, it can drive the first gear 20 to rotate through the rack plate 22 and the second gear 21. The first gear 20 can drive the rotating rod 19 to rotate synchronously, so that the rotating rod 19... The dynamic sealing plate 18 opens the first vent 5 and is tilted to guide the discharge of high-temperature gas. The high-temperature hot gas can be discharged upward, improving safety during pressure relief. Both sides of the sealing plate 18 are fixedly installed with guide baffles 23, and the inner side of the sealing plate 18 has an arc-shaped structure to facilitate the upward discharge of high-temperature hot gas. A metal strip 24 is fixedly installed on the side of the sealing plate 18 away from the first vent 5. A baffle 33 is fixedly installed at the bottom of the first vent 5, and the side of the baffle 33 near the sealing plate 18 has a sloping structure. When the rack plate 22 is away from the second gear 21, the sealing plate 18 contacts the sloping surface of the baffle 33. The weight of the metal strip 24 keeps the sealing plate 18 in an tilted state.

[0034] Working principle: When a short circuit occurs in the electrical equipment inside the equipment casing 1, the generated high-temperature gas gradually increases the air pressure inside the equipment casing 1. The telescopic airbag 9 is affected by the gradually increasing air pressure and contracts. At this time, the telescopic airbag 9 pulls the push frame 8 downward, and the push frame 8 drives the mounting rod 7 to move synchronously. Utilizing the rebound force of the first spring 12, the mounting rod 7, in conjunction with the first spring 12, drives the vent plate 4 downward along the inner side of the vent box 3. The second vent hole 6 on the vent plate 4 approaches the first vent hole 5 on the vent box 3. This allows the gas inside the equipment casing 1 to escape through the first vent 5 and the second vent 6. Simultaneously, the vent plate 4 drives the top block 13 and the rack plate 22 to move downwards synchronously. The rack plate 22 drives the second gear 21 to rotate, which in turn drives the first gear 20 to rotate. The first gear 20, through the rotating rod 19, drives the sealing plate 18 to swing outwards and contact the inclined surface of the baffle 33 inside the first vent 5, causing the sealing plate 18 to open the first vent 5 in an inclined state. At the same time, the top block 13 drives the positioning clip through the mounting cavity. Block 14 moves synchronously, causing the square sleeve 16 on the outer side of the positioning block 14 to move downwards along the outer side of the positioning plate 17. When the positioning block 14 is aligned with the slot, the square sleeve 16 moves away from the bottom of the positioning plate 17. Using the rebound force of the second spring 15, the positioning block 14 is inserted into the slot of the vent box 3, providing a limit for the movement of the vent plate 4. At this time, the second vent hole 6 on the vent plate 4 is completely aligned with the first vent hole 5 on the vent box 3, and the high-temperature gas inside the equipment shell 1 can pass through the first vent hole 5 and the second vent hole. 6. The air is discharged outward along the arc surface of the sealing plate 18 and between the two guide baffles 23. Finally, as the air pressure inside the equipment housing 1 decreases, the telescopic airbag 9 expands again, causing the vent plate 4 to return to its original position. The inner side of the square sleeve 16 contacts the inclined surface at the bottom of the positioning plate 17. Using the reaction force of the positioning plate 17 on the square sleeve 16, the square sleeve 16 pulls the positioning block 14 into the installation cavity. The second vent hole 6 can then be offset from the first vent hole 5, thus achieving a seal on the vent box 3 and achieving timely and safe exhaust.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-level protection intelligent switchgear, characterized in that, include: The equipment housing and the mounting frame installed on the outside of the equipment housing. A vent box is installed on the inside of the mounting frame. A vent plate is slidably installed on the inside of the vent box. Multiple first vent holes are opened on both sides of the vent box. Multiple second vent holes are opened on the outside of the vent plate. Also includes: A pressure relief mechanism is used to relieve pressure on the equipment casing in a timely manner. The pressure relief mechanism is installed inside the vent box and includes two mounting rods installed at the bottom of the vent plate. A push frame is fixedly installed between the two mounting rods. A telescopic airbag is installed on the bottom inner wall of the vent box. The top of the telescopic airbag is fixedly connected to the bottom of the push frame. A square opening is opened on the outside of the vent box, located outside the telescopic airbag. When the air pressure inside the equipment casing increases, the telescopic airbag can contract accordingly. The telescopic airbag can pull the push frame to move downward. The push frame pulls the vent plate to move through the mounting rods. Two positioning slide rods are installed inside the vent box. The positioning slide rods slide through the vent plate. An L-shaped bracket is fixedly installed on the outside of the positioning slide rods. A first spring is set on the outside of the positioning slide rods. The first spring is fixedly installed between the top of the vent plate and the top inner wall of the vent box. A positioning mechanism is used to position and relieve pressure on the ventilated plate. The mechanism is installed on top of the ventilated plate and includes a top block. An installation cavity is formed on the inner side of the top block, and a positioning block is slidably installed inside the installation cavity. Multiple second springs are fixedly installed between the positioning block and the inner side of the installation cavity. A slot is formed on the inner side of the ventilated box for the positioning block to be inserted into, and the height of the slot is less than the height of the positioning block. When the ventilated plate moves, the top block can drive the positioning block downwards. When the positioning block aligns with the slot, the return force of the second springs causes the positioning block to insert into the slot, ensuring that the first vent on the ventilated box is aligned with the ventilated plate. The second vent hole on the top is aligned. Two square frames are fixedly installed on one side of the positioning block. A positioning plate is slidably installed on the inner side of the square frame. The bottom of the positioning plate has a sloping structure. When the vent plate moves downward, the square frame can move downward along the outer side of the positioning plate. When the positioning block is aligned with the slot, the square frame can move away from the positioning plate, and the positioning block can be inserted into the slot. When the vent plate moves upward, the inner side of the square frame contacts the sloping bottom of the positioning plate. Using the reaction force of the positioning plate on the square frame, the square frame pulls the positioning block into the installation cavity. The inner sides of the vent plate and the top block are provided with insertion cavities for the positioning plate to limit the sliding. The air guiding mechanism is used to safely discharge the high-temperature gas inside the equipment casing. The air guiding mechanism is installed on the outside of the air vent box.

2. The multi-level protection intelligent switchgear according to claim 1, characterized in that: The air guiding mechanism includes a sealing plate disposed outside the first vent hole, a rotating rod rotatably mounted on the bottom of the sealing plate, the rotating rod being rotatably mounted inside the vent box, a first gear fixedly mounted at both ends of the rotating rod, a second gear meshing with the first gear being rotatably mounted inside the vent box, a rack plate meshing with the second gear being fixedly mounted on one side of the vent plate, flow guide baffles being fixedly mounted on both sides of the sealing plate, a metal strip being fixedly mounted on one side of the sealing plate, and a baffle strip being fixedly mounted at the bottom of the first vent hole, with the baffle strip having an inclined structure on the side near the sealing plate.

3. The multi-level protection intelligent switchgear according to claim 1, characterized in that: A rubber sleeve frame is fixedly installed on the outside of the mounting frame, and a frame-shaped groove for installing the rubber sleeve frame is opened on the outside of the equipment shell.

4. The multi-level protection intelligent switchgear according to claim 1, characterized in that: An inflation valve is fixedly installed on the outside of the telescopic airbag.

5. The multi-level protection intelligent switchgear according to claim 1, characterized in that: Both sides of the push frame are rotatably equipped with sliding balls, and the outer side of the L-shaped bracket is provided with a sliding groove for the sliding balls to be limited and slid.

6. The multi-level protection intelligent switchgear according to claim 1, characterized in that: Two rubber pads are fixedly installed at the bottom of the breathable plate, and the rubber pads are located directly above the L-shaped bracket.

7. The multi-level protection intelligent switchgear according to claim 1, characterized in that: A guide plate is installed on the outer side of the square frame, and a sliding cavity is opened on the inner side of the mounting cavity of the top block for the guide plate to slide and be limited. An optical axis that slides through the guide plate is fixedly installed on the inner side of the sliding cavity.

8. The multi-level protection intelligent switchgear according to claim 1, characterized in that: Two pulley rods are fixedly installed on the outer side of the top block. A long groove is provided on the outer side of the vent box for the pulley rods to slide in a limited position. A ring handle is fixedly installed between the two pulley rods.

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