Switch protection device

Abstract

The utility model discloses a switch protection device, and relates to the technical field of switches. The switch protection device comprises a switch body, a fixed cover and a rotary cover, the fixed cover is installed on the switch body, the fixed cover is provided with an exhaust structure communicated with the interior of the switch body, and the rotary cover is rotatably connected to the fixed cover and covers the exhaust structure. The rotatable design of the rotary cover allows a user to open or close the rotary cover according to needs, so that emission of internal gas is controlled, and the optimal working state of the equipment is kept. The rotary cover covers the exhaust structure, so that dust, dirt or water can be prevented from entering the switch, and internal components are protected from being influenced by the external environment.

Description

Technical Field

[0001] This application relates to the field of switch technology, and in particular to a switch protection device. Background Technology

[0002] With the rapid development of the new energy industry, the application scenarios of photovoltaic power generation and energy storage systems are constantly expanding. This has led to a wider range of applications for switches (circuit breakers / disconnect switches) inside cabinets, placing higher demands on them. In related technologies, because the protective structure of the switch cannot simultaneously meet the requirements for heat dissipation and sealing, foreign objects (such as sand and dust) can enter the switch, affecting its normal operation and posing safety hazards. Utility Model Content

[0003] The purpose of this application is to provide a switch protection device that improves the protection capability of the switch without affecting heat dissipation.

[0004] To achieve the above objectives, this application provides a switch protection device, comprising:

[0005] Switch body;

[0006] A fixed cover is mounted on the switch body and has an exhaust structure that communicates with the interior of the switch body.

[0007] A rotating cover is rotatably connected to a fixed cover and covers the exhaust structure.

[0008] In some embodiments, the fixed cover has a first side and a second side opposite to each other in a first direction. The first side of the fixed cover is snapped into connection with the switch body, and the second side of the fixed cover is rotatably connected to the rotating cover via a rotating member, such that the end of the rotating cover away from the rotating member is relatively opened or closed.

[0009] In some embodiments, the fixing cover includes a protective housing and a plurality of fixing plates, the plurality of fixing plates being spaced apart in a second direction and connected to the protective housing in a third direction;

[0010] The protective housing includes a protective main board, a first protective side plate, and a second protective side plate. The first protective side plate and the second protective side plate are respectively connected to both ends of the protective main board in a first direction, and both the first protective side plate and the second protective side plate extend along a third direction.

[0011] The first protective side plate has a first connecting part on the third-party upward side, and the rotating cover has a second connecting part on the third-party upward side, wherein the first connecting part and the second connecting part are rotatably connected by a rotating component.

[0012] In some embodiments, the first connecting portion is provided with a first rotating hole along the second direction;

[0013] The second connecting part is provided with a second rotating hole communicating with the first rotating hole along the second direction;

[0014] The rotating component includes a rotating shaft and a torsion spring. The rotating shaft is disposed in the first rotating hole and the second rotating hole and is connected between the rotating cover and the fixed cover. The torsion spring is sleeved on the rotating shaft.

[0015] In some embodiments, the first protective side plate is provided with a first groove recessed in a first direction, and the rotating cover is provided with a second groove recessed in a first direction, and the first groove and the second groove are spaced apart in a second direction;

[0016] The torsion spring has a spring coil and two spring arms. The spring coil is sleeved on the rotating shaft, and the two spring arms are respectively connected to the two ends of the spring coil in a first direction. One of the two spring arms is located in a first groove, and the other of the two spring arms is located in a second groove.

[0017] In some embodiments, the switch body has a first mating structure protruding from the surface of the switch body on at least one side in the first direction; the fixing cover has a second mating structure that mates with the first mating structure on one side in the first direction.

[0018] In some embodiments, the first mating structure includes a mating plate, a plurality of first beams and a plurality of second beams. The plurality of first beams are spaced apart on the mating plate along a second direction and each first beam extends along a third direction. Each second beam is connected between every two adjacent first beams and cooperates with the mating plate to form a mating groove. An exhaust structure is arranged on the mating plate, and the first beams are provided with snap-fit ​​grooves extending along a third direction.

[0019] The second mating structure has a first mating part and a second mating part. The first mating part is disposed on the first beam, and the second mating part is disposed in the snap-fit ​​groove to cover the mating groove.

[0020] In some embodiments, the fixing cover includes a protective housing and a plurality of fixing plates, the plurality of fixing plates being spaced apart in a second direction and connected to the protective housing in a third direction, wherein two adjacent fixing plates cooperate with the protective housing to form an arc-blocking groove communicating with a mating groove along a first direction.

[0021] In some embodiments, the switch protection device further includes an arc-blocking plate, which is disposed between two adjacent fixed plates in a second direction and located within an arc-blocking groove, wherein the arc-blocking plate has a through hole extending along a first direction.

[0022] In some embodiments, when the rotating cover is in the open state, the exhaust structure, mating groove, arc-blocking groove, and connecting hole are interconnected to form an exhaust passage communicating with the outside.

[0023] The technical advantage of this application lies in providing a switch protection device, including a switch body, a fixed cover, and a rotating cover. The fixed cover is mounted on the switch body and has an exhaust structure communicating with the interior of the switch body. The rotating cover is rotatably connected to the fixed cover and covers the exhaust structure. The rotatable design of the rotating cover allows users to open or close the rotating cover as needed, thereby controlling the emission of internal gases and maintaining the optimal operating condition of the equipment. The rotating cover covering the exhaust structure can prevent dust, dirt, or moisture from entering the switch, protecting the internal components from the influence of the external environment. Attached Figure Description

[0024] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the switch protection device provided in an embodiment of this application.

[0026] Figure 2 This is an exploded view of the switch protection device provided in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the structure of the switch body provided in an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the structure of the arc-blocking plate provided in the embodiment of this application, which is disposed inside the fixed cover.

[0029] Figure 5 This is a structural schematic diagram of the fixed cover from one perspective, provided in an embodiment of this application.

[0030] Figure 6 This is a structural schematic diagram of the fixed cover provided in an embodiment of this application from another perspective.

[0031] Figure 7 This is a schematic diagram of the structure of the rotating cover provided in an embodiment of this application.

[0032] Figure 8 This is a schematic diagram of the rotating component provided in an embodiment of this application.

[0033] The components in the attached diagram are labeled as follows:

[0034] 1-Switch body; 10-First mating structure; 101-Matching groove; 102-Matching plate; 103-First beam; 104-Second beam;

[0035] 1021 - Exhaust structure; 1031 - Snap-fit ​​groove; 1032 - First mounting hole; 1041 - Second mounting hole;

[0036] 2-Fixed cover; 20-Exhaust structure; 2a-First side; 2b-Second side; 21-Second mating structure; 211-First mating part; 2111-Third mounting hole; 212-Second mating part;

[0037] 201 - Protective housing; 202 - Fixing plate; 203 - Arc damping groove;

[0038] 2011 - Protective mainboard; 2012 - First protective side panel; 2013 - Second protective side panel;

[0039] 2014 - First connecting part; 141 - First rotating hole; 121 - First groove;

[0040] 3-Rotating cover; 30-Second connecting part; 301-Second rotating hole; 31-Second groove;

[0041] 4-Rotating component; 40-Shaft; 41-Torsion spring; 421-Spring coil; 422-Spring arm;

[0042] 5-Arc diaphragm; 50-Connecting hole;

[0043] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0049] Currently, when inverter cabinets are used in desert areas, the heat dissipation requirements cannot guarantee a sealed environment, and sand and dust can enter the switch, causing the following problems: sand and dust adhere to the moving and stationary contacts, leading to increased internal resistance and temperature rise; sand and dust may cause the switch operating mechanism to jam, affecting the normal operation of opening and closing; sand and dust may cause blockage of the shunt excitation or undervoltage iron core, leading to abnormal engagement or disengagement; sand and dust may cause electrical operation to jam, increasing the motor load, and even causing the motor to stall or burn out.

[0050] To solve the above problems, such as Figure 1 and Figure 2As shown in the illustration, this application provides a switch protection device. The device has three intersecting and mutually perpendicular directions: a first direction X, a second direction Y, and a third direction Z. The switch protection device includes a switch body 1, a fixed cover 2, and a rotating cover 3. The fixed cover 2 is mounted on the switch body 1 and has an exhaust structure 1021 communicating with the interior of the switch body 1. The rotating cover 3 is rotatably connected to the fixed cover 2 and covers the exhaust structure 1021. The rotatable design of the rotating cover 3 allows the user to open or close it as needed, thereby controlling the emission of internal gases and maintaining optimal equipment operation. The rotating cover 3 covers the exhaust structure 1021, preventing dust, dirt, or moisture from entering the switch and protecting internal components from external environmental influences.

[0051] like Figure 2 and Figure 3 As shown, the switch body 1 has a first mating structure 10 protruding from the surface of the switch body 1 on at least one side in the first direction X. The switch body 1 can be a circuit breaker or a disconnecting switch.

[0052] like Figure 2 and Figure 3 As shown, the first mating structure 10 has multiple mating grooves 101 arranged along the second direction Y, and each groove 101 penetrates one end of the first mating structure 10 facing away from the switch body 1 in the first direction X. The groove 101 has an exhaust structure 1021 extending along the first direction X into the interior of the switch body 1. For example, the exhaust structure 1021 can be an explosion-proof membrane; when the pressure exceeds a threshold, the explosion-proof membrane, made of metal or composite material, ruptures to form an exhaust port. Additionally, the explosion-proof membrane can also be used for dust and rain protection, preventing blockage by foreign objects. As another example, the exhaust structure 1021 can be multiple exhaust ports or vents communicating with the interior of the switch body 1. To further prevent foreign objects such as sand and dust from entering the switch, a protective membrane can also be provided at the exhaust inlet or exhaust port.

[0053] Specifically, such as Figure 3 As shown, the first mating structure 10 includes a mating plate 102, a plurality of first beams 103, and a plurality of second beams 104. An exhaust structure 1021 is arranged on the mating plate 102 to discharge gas generated during abnormal operation (e.g., short circuit) of the switch body 1. The plurality of first beams 103 are spaced apart along a second direction Y on the mating plate 102, and each first beam 103 extends along a third direction Z. Second beams 104 connect every two adjacent first beams 103 to enhance the stability and deformation resistance of the overall structure. Adjacent first beams 103, second beams 104, and the mating plate 102 cooperate to form a mating groove 101.

[0054] like Figure 3As shown, the first beam 103 has a slot 1031 extending along the third direction Z, and the slot 1031 passes through the end of the first beam 103 facing away from the switch body 1 in the first direction X. Figure 3 The diagram illustrates that each first beam 103 has a snap-fit ​​groove 1031 extending in the third direction Z to improve the connection strength between the switch body 1 and the fixing cover 2. In other embodiments, the user can set the number of snap-fit ​​grooves 1031 according to actual needs, as long as the connection strength structure between the switch body 1 and the fixing cover 2 can be ensured.

[0055] In one embodiment, each first beam 103 has a first mounting hole 1032 extending in the third direction Z, and each second beam 104 may have a second mounting hole 1041 extending in the third direction Z. A fastener (such as a bolt) passes through the first mounting hole 1032 and the second mounting hole 1041 to fix the switch body 1 in the inverter cabinet.

[0056] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the fixed cover 2 has a first side 2a and a second side 2b opposite to each other in the third direction Z. The first side 2a of the fixed cover 2 is snapped into connection with the switch body 1, and the second side 2b of the fixed cover 2 is rotatably connected to the rotating cover 3 via a rotating member 4, so that the end of the rotating cover 3 away from the rotating member 4 is either open or closed. Therefore, when the switch is disconnected, the rotating cover 3 is opened under the impact of internal air pressure, allowing the gas to be discharged smoothly, thus enabling the switch protection device to perform its protection function normally. When the switch is disconnected and the gas pressure decreases to a certain level, the rotating cover 3 can automatically reset (i.e., close) and form a good seal with the fixed cover 2 to prevent foreign objects (dust) from entering. In addition, when internal operations are required, the opening design of the rotating cover 3 can ensure the safety of the operator and avoid misoperation or accidental contact with the internal circuit.

[0057] like Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the fixing cover 2 has a second mating structure 21 on one side in the first direction X, which mates with the first mating structure 10. This second mating structure 21 has a first mating part 211 and a second mating part 212. The first mating part 211 is disposed on the first beam 103, and the second mating part 212 is disposed within the snap-fit ​​groove 1031 to fix the fixing cover 2 and the switch body 1 and cover the mating groove 101. Therefore, through the design of the first mating part 211 and the second mating part 212, the fixing cover 2 can be firmly connected to the switch body 1, ensuring that it will not loosen or shift during operation. Furthermore, this mating structure design simplifies the installation and disassembly process, making maintenance and replacement more convenient and reducing installation time and complexity. The design of the fixing cover 2 covering the mating groove 101 improves sealing, preventing dust, moisture, or other external substances from entering the interior of the switch body 1 and protecting the internal components.

[0058] like Figure 4 , Figure 5 and Figure 6 As shown, in one embodiment, the fixing cover 2 includes a protective housing 201 and a plurality of fixing plates 202. The plurality of fixing plates 202 are spaced apart in the second direction Y and connected to the protective housing 201 in the third direction Z. Two adjacent fixing plates 202 cooperate with the protective housing 201 to form an arc-blocking groove 203 that communicates with the mating groove 101 along the first direction X. The arc-blocking groove 203 can effectively isolate and guide the electric arc, preventing the electric arc from damaging other components during switching operations and improving the safety of equipment (such as inverters).

[0059] like Figure 4 , Figure 5 and Figure 6 As shown, the protective housing 201 includes a protective main board 2011, a first protective side plate 2012, and a second protective side plate 2013. The protective main board 2011 is connected to the first protective side plate 2012 and the second protective side plate 2013 at both ends in the first direction X, and both the first protective side plate 2012 and the second protective side plate 2013 extend in the third direction Z. The second protective side plate 2013 serves as the first mating part 211 of the second mating structure 21. That is, the first mating part 211 is disposed on the top surface of the first beam 103 of the first mating structure 10, and the first mating part 211 has a third mounting hole 2111 communicating with the first mounting hole 1032. Therefore, a fastener is sequentially inserted into the third mounting hole 2111 and the first mounting hole 1032 to simultaneously fix and install the fixing cover 2 and the switch body 1 within the inverter cabinet, reducing loosening and vibration.

[0060] like Figure 5 and Figure 7As shown, the first protective side plate 2012 has a first connecting part 2014 on one side in the third direction Z, and the rotating cover 3 has a second connecting part 30 in the third direction Z. The first connecting part 2014 and the second connecting part 30 are rotatably connected by a rotating member 4. Through the connection of the rotating member 4, the rotating cover 3 can rotate or move freely within a certain range, providing greater operational flexibility.

[0061] like Figure 2 , Figure 5 and Figure 7 As shown, the first connecting part 2014 has a first rotating hole 141 along the first direction X; the second connecting part 30 has a second rotating hole 301 communicating with the first rotating hole 141 along the first direction X. The rotating component 4 includes a rotating shaft 40 and a torsion spring 41. The rotating shaft 40 is disposed in the first rotating hole 141 and the second rotating hole 301, and is connected between the rotating cover and the fixed cover 2. The torsion spring 41 is sleeved on the rotating shaft 40.

[0062] Understandably, the rotating shaft 40 provides a stable rotating shaft 40 within the first rotating hole 141 and the second rotating hole 301, enabling the rotating cover to rotate smoothly and reducing wobbling and instability during rotation. The torsion spring 41, sleeved on the rotating shaft 40, provides an automatic reset function. When the rotating cover is rotated to a certain position, the elastic force of the torsion spring 41 helps the cover automatically return to its initial position, facilitating operation and use.

[0063] like Figure 5 and Figure 7 As shown, the first protective side plate 2012 has a first groove 121 recessed along the third direction Z, and the rotating cover 3 has a second groove 31 recessed along the third direction Z. The first groove 121 and the second groove 31 are spaced apart in the first direction X.

[0064] like Figure 8 As shown, the torsion spring 41 has a spring coil 421 and two spring arms 422. The spring coil 421 is sleeved on the rotating shaft 40. The two spring arms 422 are respectively connected to the two ends of the spring coil 421 in the third direction Z. One of the two spring arms 422 is disposed in the first groove 121, and the other of the two spring arms 422 is disposed in the second groove 31.

[0065] It is understandable that, such as Figure 2 , Figure 5 and Figure 7As shown, by setting the spring arms 422 in the first groove 121 and the second groove 31 respectively, the torsion spring 41 can effectively transmit torque between the rotating cover 3 and the fixed cover 2, ensuring smooth and controllable rotation. Furthermore, the fixed positions of the spring arms 422 in the two grooves provide a clear reset path, enabling the rotating cover 3 to reliably return to its initial position after rotation, thus enhancing the automatic reset function.

[0066] In one embodiment, a sealing structure (not shown) is provided in the first groove 121 and the second groove 31. This sealing structure can effectively prevent dust and moisture from entering the groove, thereby protecting the torsion spring 41 and other internal components and increasing the sealing performance of the switch guard. The sealing structure can be an elastic strip or a rubber sticker.

[0067] like Figure 4 As shown, the switch protection device also includes an arc-blocking plate 5, which extends along the second direction Y and is disposed between two adjacent fixing plates 202 in the first direction X, and is located in the arc-blocking groove 203, wherein the arc-blocking plate 5 has a through-hole along the first direction X.

[0068] Understandably, by placing the arc-blocking plate 5 between two adjacent fixed plates 202, free ions can be effectively eliminated during switch disconnection, thereby controlling the propagation of the electric arc and achieving high protection while ensuring zero arc flash. The design of the connecting hole 50 allows air circulation, which helps dissipate heat and prevents the accumulation of heat generated by the electric arc, thus reducing the risk of overheating.

[0069] When the rotating cover 3 is in the open state, the exhaust structure 1021, the mating groove 101, the arc-blocking groove 203, and the connecting hole 50 are interconnected to form an exhaust channel that communicates with the outside. This exhaust channel can effectively discharge the gas or pressure accumulated inside to avoid explosions or other safety hazards, and ensure the safety, reliability, and performance stability of the circuit breaker / isolator.

[0070] For example, when an abnormality occurs inside the circuit breaker / isolator (e.g., excessive air pressure), the end of the rotating cover 3 furthest from the rotating component 4 is opened upwards due to the air pressure impact. The torsion spring 41 is then under force. When the air pressure exceeds the force of the torsion spring 41, the rotating cover 3 remains in a relatively open state. At this time, the exhaust channel connects to the outside, allowing hot air or gas to escape, which helps dissipate heat, lowers the internal temperature, and prevents overheating from damaging the circuit breaker / isolator. During normal operation of the circuit breaker / isolator, when the air pressure is less than the force of the torsion spring 41, the end of the rotating cover 3 furthest from the rotating component 4 is in a relatively closed state under the action of the torsion spring 41, i.e., it returns from the open state to the closed state.

[0071] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0072] The foregoing has provided a detailed description of a switch protection device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A switch guard device, characterized by, The switch protection device comprises: a switch body; a fixed cover mounted on the switch body, the fixed cover having an exhaust structure in communication with the inside of the switch body; a rotating cover rotatably connected to the fixed cover and covering the exhaust structure.

2. The switch protection device according to claim 1, wherein the fixed cover has opposite first and second sides in the X direction, the first side of the fixed cover is snap-connected to the switch body, and the second side of the fixed cover is rotatably connected to the rotating cover through a rotating member, so that the end of the rotating cover away from the rotating member is relatively opened or closed.

3. The switch protection device according to claim 2, wherein the fixed cover comprises a protection shell and a plurality of fixed plates, the plurality of fixed plates are arranged at intervals in the second direction and are connected to the protection shell in the third direction; the protection shell comprises a protection main plate, a first protection side plate and a second protection side plate, the first and second protection side plates are respectively connected to the two ends of the protection main plate in the first direction, and the first and second protection side plates both extend along the third direction; the first protection side plate is provided with a first connecting portion on one side in the third direction, and the rotating cover is provided with a second connecting portion in the third direction, wherein the first connecting portion and the second connecting portion are rotatably connected through the rotating member.

4. The switch protection device according to claim 3, wherein the first connecting portion is provided with a first rotating hole in the second direction; the second connecting portion is provided with a second rotating hole in communication with the first rotating hole in the second direction; the rotating member comprises a rotating shaft and a torsional spring, the rotating shaft is arranged in the first rotating hole and the second rotating hole and is connected between the rotating cover and the fixed cover, and the torsional spring is sleeved on the rotating shaft.

5. The switch protection device according to claim 4, wherein the first protection side plate is provided with a first recess recessed in the first direction, and the rotating cover is provided with a second recess recessed in the first direction, the first recess and the second recess are arranged at intervals in the second direction; the torsional spring has a spring ring and two spring arms, the spring ring is sleeved on the rotating shaft, the two spring arms are respectively connected to the two ends of the spring ring in the first direction, one of the two spring arms is arranged in the first recess, and the other of the two spring arms is arranged in the second recess.

6. The switch protection device according to claim 1, wherein at least one side of the switch body in the first direction is provided with a first matching structure protruding from the surface of the switch body, and one side of the fixed cover in the first direction is provided with a second matching structure matched with the first matching structure.

7. The switch protection device according to claim 6, wherein The first matching structure comprises a matching plate, a plurality of first beams and a plurality of second beams, the plurality of first beams are arranged on the matching plate in the second direction and each of the first beams extends in the third direction, each of the second beams is connected between every two adjacent first beams and cooperates with the matching plate to form a matching groove, the exhaust structure is arranged on the matching plate, and the first beam is provided with a clamping through slot extending in the third direction. The second matching structure has a first matching part and a second matching part, the first matching part is arranged on the first beam, and the second matching part is arranged in the clamping through slot to cover the matching groove.

8. The switch protection device according to claim 7, wherein The fixed cover comprises a protection shell and a plurality of fixed plates, the plurality of fixed plates are arranged in the second direction and connected with the protection shell in the third direction, wherein adjacent two fixed plates and the protection shell cooperatively form an arc separation groove which is communicated with the matching groove in the first direction.

9. The switch guard of claim 8, wherein, Further comprising: An arc separation plate is arranged between the adjacent two fixed plates in the second direction and located in the arc separation groove, wherein the arc separation plate has a communication hole penetrating in the first direction.

10. The switch protection device according to claim 9, wherein In the open state of the rotating cover, the exhaust structure, the matching groove, the arc separation groove and the communication hole are communicated with each other to form an exhaust passage communicated with the outside.

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