An impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules

Abstract

This invention relates to the field of switchgear protection, specifically to an impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules. Reinforcing ribs are fixedly connected to the inner side of the cabinet, and a rib frame is provided in the middle of the cabinet door. A floating platform for loading the IGBT power modules is elastically mounted in the middle of the rib frame. A pneumatic protection component with both kinetic and thermal impact resistance is provided at the floating platform. This component includes an airbag arranged around the periphery of the floating platform, with an electrically controlled nozzle on the side of the airbag near the cabinet. When the cabinet overheats, carbon dioxide gas filled in the airbag is ejected into the cabinet through the electrically controlled nozzle, and the floating platform moves with the help of the gas reaction force until it is fixed by a self-locking mechanism. Seals are elastically mounted on both sides of the airbag. When the airbag ejects gas, causing the floating platform to move, the two seals approach each other and abut against each other, forming a barrier. This invention achieves dual protection of active avoidance and passive isolation through pneumatic linkage, effectively solving the problem of insufficient impact resistance in existing switchgear.

Description

Technical Field

[0001] This invention relates to the field of switchgear protection, specifically to an impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules. Background Technology

[0002] With the rapid development of smart grids and distributed energy, high and low voltage switchgear integrating IGBT power modules is widely used due to its rapid disconnection and power quality management capabilities. However, existing products have significant shortcomings in shock resistance, especially door-integrated IGBT switchgear. Because the IGBT modules are mounted on the movable cabinet door, they are more susceptible to mechanical shocks and internal arcing shocks. External mechanical shocks are directly transmitted to the IGBT modules, causing damage to their internal precision structures, while the high-temperature, high-pressure gases generated by internal arcing directly impact the cabinet door, causing permanent damage to the IGBT modules and even triggering safety accidents.

[0003] Traditional switchgear protection devices mostly rely on adding load-bearing components and elastic buffer structures to passively relieve mechanical impacts and the high-temperature impacts from internal arcing. These devices primarily depend on the buffering capacity of elastic structures and the deformation resistance of rigid load-bearing components to offset the impact, but they cannot prevent the continued combustion and energy release of the arc. The continuous high temperature generated by the arc rapidly heats the air inside the cabinet, forming a strong hot airflow that dissipates corrosive particles from the decomposition of molten metal and insulating materials. Without a fire extinguishing function, the arc will continue to burn until the power is cut off. During this process, new high-temperature gases and corrosive substances are continuously generated, causing continuous and irreversible damage to the IGBT modules.

[0004] In addition, existing switchgear, in order to improve the protection level, typically encloses IGBT modules in a sealed space, which leads to poor heat dissipation, increased module junction temperature, and reduced reliability. Adding heat dissipation channels, on the other hand, reduces protection performance, allowing dust and moisture to penetrate more easily. Furthermore, the existing door-integrated switchgear has an unreasonable structural design; the cabinet door has poor resistance to deformation and is prone to twisting and deformation under impact, affecting the normal operation of the mechanical interlocking mechanism and posing a serious safety hazard. Therefore, it is necessary to design an impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules to solve the above problems. Summary of the Invention

[0005] Therefore, it is necessary to provide an impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules to address the existing technical problems.

[0006] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0007] An impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules, comprising:

[0008] The cabinet is fixed with reinforcing ribs on the inside, and a rib plate frame is set in the middle of the cabinet door. A floating platform for the load IGBT power module is flexibly set in the middle of the rib plate frame.

[0009] The floating platform is equipped with a pneumatic protection component to resist kinetic and thermal impacts. The pneumatic protection component includes an airbag arranged around the perimeter of the floating platform. An electrically controlled nozzle is provided on the side of the airbag closest to the cabinet. When the cabinet is overheated, the carbon dioxide gas filled inside the airbag is sprayed out toward the cabinet through the electrically controlled nozzle. The floating platform moves by the gas reaction force until it is fixed by the self-locking mechanism.

[0010] The airbag is elastically fitted with a cover on each side. The cover abuts against the outer wall of the bulging airbag. When the airbag sprays gas and moves the floating platform away from the cabinet, the two covers approach each other until they abut against each other and form a partition.

[0011] A heat dissipation plate is installed on the side of the cabinet door away from the airbag, and a honeycomb energy-absorbing box is installed on the side of the heat dissipation plate away from the airbag.

[0012] A protective partition box is fixedly connected to the side of the floating platform away from the stiffener frame, and the protective partition box is slidably fitted with a fixed sleeve box that is fixedly connected to the cabinet door.

[0013] The outer walls of the protective compartment and the fixed sleeve are respectively provided with heat dissipation holes.

[0014] A locking pin is fixed to the side of the floating platform near the fixed sleeve box, and the locking pin is slidably connected to a sleeve fixed to the fixed sleeve box along the same axis.

[0015] A first spring is coaxially sleeved on the locking pin, with one end of the first spring fixedly connected to the locking pin and the other end fixedly connected to the sleeve.

[0016] A carbon dioxide storage tank is installed on the side of the heat dissipation plate away from the honeycomb energy absorption box, and the tank is connected to the air bag through an air pump.

[0017] A temperature sensor, which is fixed to the cabinet door, is installed below the stiffener frame. The temperature sensor is electrically connected to the electronically controlled nozzle.

[0018] A further sealing shell has a support plate fixed to the cabinet door on the side away from the cabinet door. Two guide strip holes are opened in the middle of the support plate. A guide block is fixed to the side of the support plate away from the sealing shell. A slider is fixed to the side of the sealing shell away from the cabinet door. The slider is slidably connected to the guide strip holes.

[0019] A tension spring is provided on the side of the guide block near the slider. One end of the tension spring is fixed to the guide block, and the other end is fixed to the slider.

[0020] Further, heat-resistant adhesive strips are fixed to the adjacent sides of the two casings.

[0021] A magnet is provided on the side of the heat-resistant adhesive strip to be fixed to the casing.

[0022] The further self-locking mechanism also includes a dummy force column fixed to the middle of the fixed sleeve box. The dummy force column is slidably connected to the floating platform. An anti-detachment pad is fixed to the end of the dummy force column away from the fixed sleeve box. The anti-detachment pad abuts against the end of the floating platform away from the locking pin.

[0023] Furthermore, a cavity is provided in the middle of the dummy potential column, and the self-locking mechanism also includes a partition plate disposed in the middle of the cavity, which is fixedly connected to the inner wall of the cavity.

[0024] The partition is symmetrically provided with wedges that slide in connection with the cavity. The side of the wedge away from the partition extends from both sides of the dummy column. The side of the wedge extending from the cavity is formed with an inclined surface near the anti-detachment pad. The side of the wedge near the partition is provided with a second spring.

[0025] One end of the second spring is fixedly connected to the wedge block, and the other end is fixedly connected to the partition plate.

[0026] Furthermore, a guide pin is provided on the side of the wedge block near the anti-detachment pad. One end of the guide pin is fixed to the partition plate, and the other end is fixed to the cavity sidewall inside the dummy column.

[0027] The guide pin is slidably connected to a transition plate. A third spring is provided on the side of the transition plate near the partition, which is coaxial with the guide pin. One end of the third spring is fixedly connected to the partition, and the other end is fixedly connected to the transition plate.

[0028] The wedge has a flange on the side near the adapter plate. One end of the adapter plate abuts against the side of the wedge flange away from the partition, and the other end is fixedly connected to a reset clamp.

[0029] The beneficial effects of this invention compared to the prior art are:

[0030] Firstly, this solution uses the flexible buffer of the annular airbag to absorb conventional mechanical impacts and utilizes the gas reaction force to actively push the IGBT module away from the arcing danger zone, avoiding direct impact from high-temperature and high-pressure gases. At the same time, the automatic closure of the side shells forms physical isolation, completely isolating splashing debris and corrosive substances. Compared with traditional passive protection, this solution significantly reduces the damage rate of IGBT modules in arcing accidents, shortens fault recovery time, and effectively improves power supply reliability.

[0031] Secondly, this solution integrates the heat sink and the honeycomb energy-absorbing box on the outside of the cabinet door. Without affecting the protection level, it achieves efficient heat dissipation of the IGBT module and improves the operating temperature environment of the module. The honeycomb energy-absorbing box not only absorbs vertical impact energy as an energy-absorbing element, but also enhances the overall rigidity of the cabinet door as a structural reinforcement, thereby improving the door's resistance to deformation. In addition, the elastic support design of the floating platform and the linkage protection mechanism effectively reduce the damage to the device caused by long-term vibration, extend the service life of the equipment, and reduce maintenance costs. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of an embodiment;

[0033] Figure 2 This is a three-dimensional structural diagram of the cabinet door and floating platform in the embodiment;

[0034] Figure 3 This is a three-dimensional structural diagram of the floating platform and airbag in the embodiment;

[0035] Figure 4 yes Figure 3 Enlarged view of the structure at point A in the middle;

[0036] Figure 5 This is an exploded three-dimensional structural diagram of the honeycomb energy-absorbing box and heat sink in the embodiment;

[0037] Figure 6 This is an exploded three-dimensional structural diagram of the water pump and the fixed casing in the embodiment;

[0038] Figure 7 This is a three-dimensional structural diagram of the water pump and the fixed casing in the embodiment;

[0039] Figure 8 This is a three-dimensional structural diagram of the fixed sleeve box and the floating platform in the embodiment;

[0040] Figure 9 This is a three-dimensional structural diagram of the wedge and dummy potential column in the embodiment;

[0041] Figure 10 This is a three-dimensional structural exploded view of the wedge and dummy potential column in the embodiment;

[0042] Figure 11 This is a half-sectional view of the planar structure of the wedge and dummy potential column in the embodiment.

[0043] The numbers on the map are:

[0044] 1. Floating platform; 2. Rib frame; 3. First spring; 4. Locking pin; 5. Sleeve; 6. Protective compartment; 7. Heat dissipation hole; 8. Fixed sleeve box; 9. Pneumatic protective assembly; 10. Airbag; 11. Air tank; 12. Electrically controlled nozzle; 13. Temperature sensor; 14. Sealing shell; 15. Support plate; 16. Guide strip hole; 17. Guide block; 18. Slider; 19. Tension spring; 20. Heat-resistant rubber strip; 21. Magnet; 22. Self-locking mechanism; 23. False potential column; 24. Anti-detachment gasket; 25. Second spring; 26. Partition plate; 27. Wedge block; 28. Third spring; 29. ​​Adapter plate; 30. Guide pin; 31. Reset clamp plate; 32. Heat dissipation plate; 33. Reinforcing rib; 34. Honeycomb energy absorption box. Detailed Implementation

[0045] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0046] refer to Figures 1 to 11 An impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules, comprising:

[0047] The cabinet is fixed with a reinforcing rib 33 on the inside, and a rib plate frame 2 is provided in the middle of the cabinet door. A floating platform 1 for loading IGBT power modules is flexibly provided in the middle of the rib plate frame 2.

[0048] A pneumatic protection component 9 for resisting kinetic and thermal impacts is provided at the floating platform 1. The pneumatic protection component 9 includes an airbag 10 arranged around the perimeter of the floating platform 1. An electrically controlled nozzle 12 is provided on the side of the airbag 10 near the cabinet. When the inside of the cabinet is overheated, the carbon dioxide gas filled inside the airbag 10 is sprayed toward the cabinet through the electrically controlled nozzle 12. The floating platform 1 moves by the gas reaction force until it is fixed by the self-locking mechanism 22.

[0049] On both sides of the airbag 10, there are elastically provided sealing shells 14. The sealing shells 14 abut against the outer wall of the bulging airbag 10. When the airbag 10 sprays gas and drives the floating platform 1 to move away from the cabinet, the two sealing shells 14 approach each other until they abut against each other and form a partition.

[0050] A heat dissipation plate 32 is provided on the side of the cabinet door away from the airbag 10, and a honeycomb energy-absorbing box 34 is provided on the side of the heat dissipation plate 32 away from the airbag 10.

[0051] Under normal operating conditions, the IGBT power modules of this switchgear are elastically supported on the cabinet door stiffener frame 2 via the floating platform 1. This elastic support effectively isolates the cabinet from conventional vibrations transmitted through the cabinet body, preventing loose connections and device fatigue caused by long-term vibration. The annular airbag 10 surrounding the floating platform 1 maintains a set inflation pressure, serving as a flexible buffer layer to absorb minor impacts from inside the cabinet, and forming a sealed barrier between the cabinet door and the cabinet body to prevent dust and moisture from entering the IGBT modules. The heat dissipation plate 32 on the outside of the cabinet door is thermally connected to the floating platform 1, efficiently dissipating the heat generated by the IGBTs. The honeycomb energy-absorbing box 34 serves as a structural reinforcement to improve the overall rigidity of the cabinet door, while also allowing for vertical energy absorption stroke.

[0052] When a short circuit arc or abnormal overheating occurs inside the cabinet, the detection device detects the fault signal and immediately triggers the pneumatic protection component 9. At this time, all the electrically controlled nozzles 12 on the annular airbag 10 open synchronously at high speed, and the pre-charged high-pressure carbon dioxide gas is injected at high speed into the arcing area, extinguishing the arc through a dual action of suffocation and cooling. At the same time, the powerful reaction force generated by the gas injection propels the floating platform 1 to move rapidly away from the cabinet along the guide structure, allowing the IGBT module to instantly escape the dangerous environment of high temperature and high pressure, avoiding direct damage from the high-temperature gas and metal fragments generated by the arc.

[0053] When the floating platform 1 reaches its limit travel, the self-locking mechanism 22 pushes the locking member into the locking structure of the floating platform 1, achieving rigid self-locking of the floating platform 1 and preventing it from shifting during subsequent impacts. As the gas inside the annular airbag 10 is rapidly ejected, the volume of the airbag 10 gradually contracts. The two shells 14, which were originally stretched open by the airbag 10, lose their support and move rapidly towards each other under the action of the elastic reset member, finally locking precisely in front of the IGBT module to form a completely sealed protective chamber, completely isolating external high temperatures, corrosive substances, and flying debris, achieving a seamless connection from fault detection to comprehensive protection.

[0054] To provide comprehensive protection for the floating platform 1, the following features are specifically designed:

[0055] like Figure 3 As shown, a protective partition box 6 is fixedly connected to the side of the floating platform 1 away from the stiffener frame 2, and a fixed sleeve box 8 fixedly connected to the cabinet door is slidably sleeved on the protective partition box 6.

[0056] The outer walls of the protective partition box 6 and the fixed sleeve box 8 are respectively provided with heat dissipation holes 7.

[0057] During normal operation, the protective enclosure 6 and the fixed enclosure 8 interlock to form a semi-enclosed space, preventing dust and foreign objects from entering the IGBT module. The heat dissipation holes 7 on the outer walls of both enclosures maintain airflow, ensuring that the heat dissipation effect is not affected. When the floating platform 1 moves away from the cabinet, the protective enclosure 6 slides synchronously with the floating platform 1, always maintaining continuous protection for the sides of the IGBT module to prevent side splashes from damaging the device.

[0058] To supplement the elastic connection structure of floating platform 1, the following features are specifically provided:

[0059] like Figure 8 As shown, a locking pin 4 is fixedly connected to the side of the floating platform 1 near the fixed sleeve box 8, and a sleeve 5 fixedly connected to the fixed sleeve box 8 is slidably connected to the locking pin 4 along the same axis.

[0060] The first spring 3 is coaxially sleeved on the locking pin 4. One end of the first spring 3 is fixedly connected to the locking pin 4, and the other end is fixedly connected to the sleeve 5.

[0061] During normal operation, the locking pin 4 and the sleeve 5 cooperate to provide precise axial guidance for the floating platform 1, while the first spring 3 provides elastic support, absorbing vibrations and impacts from the cabinet door and preventing the rigid transmission of vibrations to the IGBT module. When the gas reaction force pushes the floating platform 1 to move, the locking pin 4 slides smoothly along the sleeve 5, the first spring 3 is compressed to store energy, and at the same time, it restricts the floating platform 1 to move only in a direction perpendicular to the cabinet door.

[0062] To supplement the inflation and deflation process of the airbag 10, the following features are specifically provided:

[0063] like Figure 2 , Figure 5 and Figure 7 As shown, a carbon dioxide storage tank 11 is provided on the side of the heat sink 32 away from the honeycomb energy absorption box 34, and the tank 11 is connected to the air bag 10 through an air pump.

[0064] A temperature sensor 13, which is fixed to the cabinet door, is installed below the stiffener frame 2. The temperature sensor 13 is electrically connected to the electrically controlled nozzle 12.

[0065] During normal operation, the air pump automatically fills the annular air bladder 10 with carbon dioxide from the air tank 11, maintaining the set working pressure of the air bladder 10. The temperature sensor 13 monitors the internal temperature changes of the cabinet in real time and continuously feeds back the operating status to the control system. When an abnormal temperature rise or arcing characteristic signal is detected, the temperature sensor 13 immediately sends a trigger command to control all electrically controlled nozzles 12 to open synchronously.

[0066] To provide a detailed explanation of the movement process of the cover 14, the following features are also provided:

[0067] like Figure 2 , Figure 3 and Figure 4 As shown, a support plate 15 is provided on the side of the cover 14 away from the cabinet door and is fixedly connected to the cabinet door. Two guide strip holes 16 are opened in the middle of the support plate 15. A guide block 17 is fixedly connected on the side of the support plate 15 away from the cover 14. A slider 18 is fixedly connected on the side of the cover 14 away from the cabinet door. The slider 18 is slidably connected to the guide strip holes 16.

[0068] A tension spring 19 is provided on the side of the guide block 17 near the slider 18. One end of the tension spring 19 is fixedly connected to the guide block 17, and the other end is fixedly connected to the slider 18.

[0069] When the airbag 10 inflates, its outer wall expands outward, pushing the two covers 14 to move apart along the guide strip holes 16, and the tension spring 19 is stretched to store elastic potential energy. When the airbag 10 deflates and contracts, the supporting force of the airbag 10 on the covers 14 disappears, the tension spring 19 releases its potential energy, and pulls the slider 18 to slide towards each other along the guide strip holes 16, causing the covers 14 to quickly close in the middle.

[0070] To enhance the protection effect, the following features were also included:

[0071] like Figure 4 As shown, heat-resistant adhesive strips 20 are fixedly connected to the adjacent sides of the two enclosures 14. When the two enclosures 14 are closed together, the heat-resistant adhesive strips 20 are uniformly compressed, filling all gaps between the mating surfaces of the enclosures 14 to form an airtight seal, effectively preventing high-temperature gases, corrosive substances, and small metal fragments from entering the protective chamber. The heat-resistant adhesive strips 20 can withstand the high temperatures generated by arcing and maintain their sealing performance even after a failure.

[0072] To prevent the two casings 14 from separating due to external impact after they come into contact, the following features are specifically provided:

[0073] like Figure 4 As shown, a magnet 21 is provided on the side of the heat-resistant adhesive strip 20 and is fixed to the cover 14. After the cover 14 is completely closed, the opposite magnets 21 on the mating surfaces of the two covers 14 attract each other and generate a stable attraction force, preventing the cover 14 from being accidentally separated due to external impact, internal pressure fluctuation or vibration, and ensuring that the sealing and protection effect of the care chamber can be maintained until the fault is cleared and manually unlocked.

[0074] To ensure that the floating platform 1 does not displace excessively under the action of the first spring 3, the following features are specifically designed:

[0075] like Figure 2 , Figure 3 and Figure 8As shown, the self-locking mechanism 22 also includes a dummy force post 23 fixedly connected to the middle of the fixed sleeve box 8. The dummy force post 23 is slidably connected to the floating platform 1. An anti-detachment pad 24 is fixedly connected to the end of the dummy force post 23 away from the fixed sleeve box 8. The anti-detachment pad 24 abuts against the end of the floating platform 1 away from the locking pin 4. During the movement of the floating platform 1 away from the cabinet, the dummy force post 23 provides auxiliary guidance for the floating platform 1, ensuring that its movement trajectory does not deviate. When the floating platform 1 does not move away from the cabinet, the anti-detachment pad 24 abuts against the end face of the floating platform 1, preventing the floating platform 1 from continuing to move closer to the cabinet, and preventing it from displacing excessively under the action of the first spring 3 and detaching from the fixed sleeve box 8.

[0076] To supplement the detailed structure of the self-locking mechanism 22, the following features are also provided:

[0077] like Figure 2 , Figure 9 , Figure 10 and Figure 11 As shown, a cavity is provided in the middle of the dummy potential column 23, and the self-locking mechanism 22 also includes a partition 26 disposed in the middle of the cavity, and the partition 26 is fixedly connected to the inner wall of the cavity.

[0078] The partition plate 26 is symmetrically provided with wedges 27 that are slidably connected to the cavity. The side of the wedge 27 away from the partition plate 26 extends from both sides of the dummy column 23. The side of the wedge 27 extending out of the cavity near the anti-detachment pad 24 is formed with an inclined surface. The side of the wedge 27 near the partition plate 26 is provided with a second spring 25.

[0079] One end of the second spring 25 is fixedly connected to the wedge block 27, and the other end is fixedly connected to the partition plate 26.

[0080] As the floating platform 1 moves toward the anti-detachment pad 24, the inner edge of the floating platform 1 contacts the inclined surface of the wedge 27, pressing the two wedges 27 into the cavity, thus compressing the second spring 25. After the floating platform 1 has completely passed the position of the wedges 27, the second spring 25 pushes the wedges 27 to extend from both sides of the cavity and lock them onto the inner end face of the floating platform 1, preventing the floating platform 1 from rebounding and achieving rigid self-locking.

[0081] To facilitate the unlocking of the moved floating platform 1 by operators, the following features are specifically designed:

[0082] like Figure 11 As shown, a guide pin 30 is provided on the side of the wedge block 27 near the anti-detachment pad 24. One end of the guide pin 30 is fixedly connected to the partition plate 26, and the other end is fixedly connected to the cavity sidewall inside the dummy column 23.

[0083] The guide pin 30 is slidably connected to the adapter plate 29. The adapter plate 29 is provided with a third spring 28 on the side near the partition plate 26, which is coaxial with the guide pin 30. One end of the third spring 28 is fixedly connected to the partition plate 26, and the other end is fixedly connected to the adapter plate 29.

[0084] The wedge 27 has a flange on the side near the adapter plate 29. One end of the adapter plate 29 abuts against the side of the flange of the wedge 27 away from the partition plate 26, and the other end is fixedly connected to the reset clamp 31.

[0085] When unlocking is required, the operator presses the reset clamp 31, causing the adapter plate 29 to move along the guide pin 30 towards the partition 26, compressing the third spring 28. Simultaneously, the adapter plate 29 pushes the flanges of the two wedges 27, causing the wedges 27 to retract into the cavity against the elastic force of the second spring 25, releasing the lock on the floating platform 1. The floating platform 1 then automatically resets to its initial position under the tension of the first spring 3.

[0086] In normal operation, the IGBT power modules are fixed on the floating platform 1 and suspended on the cabinet door frame 2 by an elastic support structure consisting of a locking pin 4, a sleeve 5, and a first spring 3. This effectively isolates the cabinet from normal vibrations and prevents loosening of connections and fatigue of components caused by long-term vibration. The protective partition 6 and the fixed sleeve 8 are interlocked to form a semi-enclosed protection for the sides of the IGBT modules. The heat dissipation holes 7 on the outer walls of both maintain airflow, and together with the heat dissipation plate 32 on the outside of the cabinet door, the heat generated by the IGBTs is efficiently dissipated. The annular airbag 10 surrounding the floating platform 1 is maintained at a set inflation pressure by an air pump. On the one hand, it acts as a flexible buffer layer to absorb minor impacts from inside the cabinet; on the other hand, it forms a sealed barrier between the cabinet door and the cabinet body to prevent dust and moisture intrusion. The honeycomb energy-absorbing box 34 is fixed to the outside of the heat dissipation plate 32. It serves as a structural reinforcement to improve the overall rigidity of the cabinet door and also provides a vertical energy-absorbing stroke to cope with accidental fall impacts.

[0087] When a short circuit arc or abnormal overheating occurs inside the cabinet, the temperature sensor 13 detects a fault signal and immediately sends a trigger command to the electronically controlled nozzles 12. All electronically controlled nozzles 12 open synchronously at high speed, and the high-pressure carbon dioxide gas pre-stored in the gas tank 11 is injected at high speed into the arcing area through the nozzles, quickly extinguishing the arc through a dual action of suffocation and cooling. At the same time, the powerful reaction force generated by the gas injection pushes the floating platform 1 to move rapidly away from the cabinet along the guide pin 4 and the dummy potential column 23, allowing the IGBT module to instantly escape the dangerous environment of high temperature and high pressure, avoiding direct damage from the high-temperature gas and metal fragments generated by the arc.

[0088] When the floating platform 1 moves to its limit position, the wedge 27 on the dummy force column 23 pops out under the action of the second spring 25 and locks into the inner end face of the floating platform 1, achieving rigid self-locking of the floating platform 1 and preventing it from shifting or rebounding in subsequent impacts. As the gas in the annular airbag 10 is rapidly ejected, the volume of the airbag 10 gradually contracts, and the two shells 14, which were originally stretched open by the airbag 10, lose their support and move rapidly towards each other along the guide strip hole 16 under the action of the tension spring 19. When the two shells 14 are docked, the heat-resistant rubber strip 20 is compressed to form an airtight seal, and the magnets 21 on the docking surface attract and lock each other, finally forming a completely sealed protective chamber in front of the IGBT module, completely isolating it from external high temperatures, corrosive substances, and flying debris.

[0089] After troubleshooting, the operator presses the reset clamp 31, which pushes the wedge 27 back into the cavity via the adapter plate 29, releasing the self-locking mechanism 22 from locking the floating platform 1. Under the force of the first spring 3, the floating platform 1 resets to its initial position along the guide structure, simultaneously pushing the two sealing shells 14 to separate to both sides. The airbag 10 is re-inflated to the set pressure by the air pump, and the system automatically returns to normal operation. The entire protection process requires no manual intervention; the precise linkage of each component achieves fully automated protection from fault detection and active avoidance to physical isolation.

[0090] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules, characterized in that, include: The inner side of the cabinet is fixed with reinforcing ribs (33), and the middle of the cabinet door is provided with a rib plate frame (2). The middle of the rib plate frame (2) is flexibly provided with a floating platform (1) for the load IGBT power module. A pneumatic protection component (9) for resisting kinetic and thermal impacts is provided at the floating platform (1). The pneumatic protection component (9) includes an airbag (10) arranged around the periphery of the floating platform (1). An electronically controlled nozzle (12) is provided on the side of the airbag (10) close to the cabinet. When the cabinet is overheated, the carbon dioxide gas filled inside the airbag (10) is sprayed towards the cabinet through the electronically controlled nozzle (12). The floating platform (1) moves by the gas reaction force until it is fixed by the self-locking mechanism (22). The airbag (10) is elastically provided with a cover (14) on both sides. The cover (14) abuts against the outer wall of the bulging airbag (10). When the airbag (10) sprays out gas, it drives the floating platform (1) to move away from the cabinet. The two covers (14) approach each other until they abut against each other and form a partition. A heat dissipation plate (32) is provided on the side of the cabinet door away from the airbag (10), and a honeycomb energy-absorbing box (34) is provided on the side of the heat dissipation plate (32) away from the airbag (10).

2. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 1, characterized in that, A protective partition box (6) is fixedly connected to the side of the floating platform (1) away from the stiffener frame (2), and the protective partition box (6) is slidably fitted with a fixed sleeve box (8) that is fixedly connected to the cabinet door. The outer walls of the protective partition box (6) and the fixed sleeve box (8) are respectively provided with heat dissipation holes (7).

3. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 2, characterized in that, A locking pin (4) is fixed to the side of the floating platform (1) near the fixed sleeve box (8), and the locking pin (4) is slidably connected to a sleeve (5) fixed to the fixed sleeve box (8) along the same axis. The first spring (3) is coaxially sleeved on the pin (4). One end of the first spring (3) is fixedly connected to the pin (4), and the other end is fixedly connected to the sleeve (5).

4. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 1, characterized in that, A carbon dioxide storage tank (11) is provided on the side of the heat sink (32) away from the honeycomb energy absorption box (34), and the tank (11) is connected to the air bag (10) through an air pump. A temperature sensor (13) is fixed to the cabinet door below the stiffener frame (2), and the temperature sensor (13) is electrically connected to the electronically controlled nozzle (12).

5. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 1, characterized in that, The side of the cover (14) away from the cabinet door is provided with a support plate (15) that is fixed to the cabinet door. Two guide strip holes (16) are opened in the middle of the support plate (15). A guide block (17) is fixed to the side of the support plate (15) away from the cover (14). A slider (18) is fixed to the side of the cover (14) away from the cabinet door. The slider (18) is slidably connected to the guide strip hole (16). A tension spring (19) is provided on the side of the guide block (17) near the slider (18). One end of the tension spring (19) is fixedly connected to the guide block (17), and the other end is fixedly connected to the slider (18).

6. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 5, characterized in that, Heat-resistant adhesive strips (20) are fixed to the side of the two shells (14) that are close to each other.

7. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 6, characterized in that, A magnet (21) is provided on the side of the heat-resistant adhesive strip (20) and is fixed to the cover (14).

8. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 3, characterized in that, The self-locking mechanism (22) also includes a dummy force column (23) fixedly connected to the middle of the fixed sleeve box (8). The dummy force column (23) is slidably connected to the floating platform (1). An anti-detachment pad (24) is fixedly connected to the end of the dummy force column (23) away from the fixed sleeve box (8). The anti-detachment pad (24) abuts against the end of the floating platform (1) away from the locking pin (4).

9. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 8, characterized in that, The false potential column (23) has a cavity in the middle, and the self-locking mechanism (22) also includes a partition (26) set in the middle of the cavity, which is fixedly connected to the inner wall of the cavity; The partition (26) is symmetrically provided with wedges (27) that are slidably connected to the cavity. The side of the wedge (27) away from the partition (26) extends from both sides of the dummy column (23). The side of the wedge (27) extending out of the cavity is formed with an inclined surface near the anti-detachment pad (24). The side of the wedge (27) near the partition (26) is provided with a second spring (25). One end of the second spring (25) is fixed to the wedge (27), and the other end is fixed to the partition (26).

10. The impact-resistant intelligent high and low voltage switchgear with integrated IGBT power modules according to claim 9, characterized in that, A guide pin (30) is provided on the side of the wedge (27) near the anti-detachment pad (24). One end of the guide pin (30) is fixedly connected to the partition (26), and the other end is fixedly connected to the cavity sidewall inside the dummy column (23). The guide pin (30) is slidably connected to the adapter plate (29). The adapter plate (29) is provided with a third spring (28) on the side near the partition plate (26) and is coaxial with the guide pin (30). One end of the third spring (28) is fixedly connected to the partition plate (26) and the other end is fixedly connected to the adapter plate (29). The wedge (27) has a flange on the side near the adapter plate (29). One end of the adapter plate (29) abuts against the side of the flange of the wedge (27) away from the partition plate (26), and the other end is fixedly connected to the reset clamp (31).

Images