High-voltage quick switch cabinet integrated with three magnetic control quick switches

Abstract

The invention belongs to the technical field of switch cabinets, and particularly relates to a high-voltage quick switch cabinet integrated with three magnetic control quick switches, which comprises a cabinet body, the cabinet body is composed of a machine core assembly, a shell assembly and a secondary top box, a high-voltage chamber, a mechanism chamber and a pressure relief channel are arranged in the shell assembly, the secondary top box is fixed at the top of the shell assembly, and the high-voltage chamber, the mechanism chamber and the pressure relief channel are arranged in the secondary top box. The machine core assembly is installed in an inner cavity of the shell assembly and corresponds to the high-voltage chamber. The machine core assembly comprises an air box and a three-magnetic-control-mechanism fast switch, the three-magnetic-control-mechanism fast switch is arranged in the air box, and three magnetic control units of the three-magnetic-control-mechanism fast switch are correspondingly connected with the three-phase circuit through wires respectively and used for achieving on-off control of the three-phase circuit. The quick action of the switch is realized by adopting quick action technologies such as electromagnetic driving and the like, the on-off operation of a circuit can be completed in a short time, and the switch has the advantages of high action speed, high reliability, convenience in maintenance and the like, and is suitable for various power system scenes.

Description

Technical Field

[0001] This invention belongs to the field of switchgear technology, and particularly relates to a high-voltage fast switchgear with integrated three magnetic control fast switches. Background Technology

[0002] With the increasing urgency of power systems requiring rapid fault current interruption and precise control, especially in scenarios demanding high circuit response speeds, existing high-voltage switchgear exhibits significant technical shortcomings. Its circuit switching speed is insufficient, making it difficult to complete fault current interruption and precise circuit control within a very short time, thus failing to meet the stringent requirements of power systems for operational stability and fault handling efficiency. Therefore, there is an urgent need for a high-voltage switchgear capable of rapid operation to overcome the shortcomings of traditional equipment in terms of switching speed and meet the practical needs of power systems for rapid protection and precise control. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a high-voltage fast switch cabinet with integrated three magnetic control fast switches, which achieves the desired effect.

[0004] In view of this, the present invention provides a high-voltage fast switchgear with integrated three magnetic control fast switches, comprising:

[0005] The cabinet, comprising a core assembly, a housing assembly, and a secondary top box, wherein:

[0006] The housing assembly contains a high-pressure chamber, a mechanism chamber, and a pressure relief channel. The secondary top box is fixed to the top of the housing assembly, and the mechanism assembly is installed in the inner cavity of the housing assembly and is correspondingly arranged to the high-pressure chamber.

[0007] The mechanism assembly includes an air box and a three-magnetic control mechanism quick switch. The three-magnetic control mechanism quick switch is located inside the air box, and its three magnetic control units are respectively connected to the three-phase circuit through wires to realize the on-off control of the three-phase circuit.

[0008] The mechanism room is located on one side of the high-voltage room, and the mechanism room is used to install the operating mechanism that cooperates with the three magnetic control mechanism quick switch.

[0009] Furthermore, the gas box is fitted to the inner wall of the high-pressure chamber through a sealing ring to achieve a sealed fit between the gas box and the high-pressure chamber.

[0010] Furthermore, the air box is equipped with an aviation connector on its exterior, and the secondary top box is connected to the aviation connector via a wire harness to realize the signal and power transmission between the secondary top box and the three magnetic control mechanisms inside the air box for rapid switching.

[0011] Furthermore, the high-pressure chamber is equipped with a measuring sleeve and an incoming cable. The measuring sleeve is installed in the corresponding mounting hole below the front plate of the gas box, and its side away from the gas box extends to the outside of the gas box and is located inside the high-pressure chamber for connection with the incoming cable.

[0012] Furthermore, a cable hole is provided at the bottom of the high-voltage chamber for the cable to enter and exit. The cable hole is correspondingly set with the external connection end of the measuring sleeve so that the incoming cable enters the high-voltage chamber through the cable hole and connects with the measuring sleeve.

[0013] Furthermore, the high-pressure chamber is equipped with a high-pressure chamber door, and the operating mechanism installed inside the mechanism includes an isolation mechanism. An isolation locking rod is provided between the high-pressure chamber door and the isolation mechanism. One end of the isolation locking rod is hinged to the high-pressure chamber door, and the other end is engaged with the isolation mechanism to realize the linkage locking between the high-pressure chamber door and the isolation mechanism.

[0014] Furthermore, the operating mechanism installed indoors also includes a manual tripping mechanism. The manual tripping mechanism is connected to the quick switch of the three magnetic control mechanism inside the gas box through the circuit breaker dynamic seal mounting hole on the front plate of the gas box. The isolation mechanism is connected to the quick switch of the three magnetic control mechanism through the isolation switch dynamic seal mounting hole on the front plate of the gas box.

[0015] Furthermore, a five-proof interlock plate is provided between the manual tripping mechanism and the isolation mechanism. The five-proof interlock plate is fixed in the mechanism chamber, so that the manual tripping mechanism and the isolation mechanism form a mechanical interlock to prevent the two from operating simultaneously.

[0016] Furthermore, the mechanism room is equipped with a mechanism room door, which has a tripping operation hole, an isolation operation hole and a grounding operation hole. The tripping operation hole corresponds to the manual tripping mechanism, and the isolation operation hole and the grounding operation hole are respectively matched with the corresponding operating parts of the isolation mechanism. A protective padlock is installed at each of the tripping operation hole, the isolation operation hole and the grounding operation hole.

[0017] The door of the mechanism is also equipped with a pressure gauge observation window, a circuit breaker indicator observation window, and an isolation indicator observation window. The pressure gauge observation window corresponds to the pressure gauge outside the air box, the circuit breaker indicator observation window corresponds to the circuit breaker status indicator of the three magnetic control mechanism fast switch, and the isolation indicator observation window corresponds to the isolation status indicator of the isolation mechanism.

[0018] Furthermore, the gas box is made by laser airtight welding and has a busbar copper rod inside. One end of the busbar copper rod is connected to the lower interface of the three magnetic control mechanism quick switch, and the other end is connected to the measuring sleeve. The end of the three magnetic control mechanism quick switch away from the busbar copper rod is softly connected through an inner conical sleeve. The gas box is also equipped with an explosion-proof valve, and the pressure relief direction of the explosion-proof valve corresponds to the pressure relief channel of the shell assembly.

[0019] The beneficial effects of this invention are:

[0020] This invention employs a fast switch based on a three-magnetic-control mechanism as the core switch of the switchgear. The three magnetic control mechanisms control the operation of the three phases (A, B, and C) respectively, resulting in faster opening and closing speeds. The circuit can be switched on or off within 5ms, a significantly improved operating speed compared to traditional switchgear. Simultaneously, a manual tripping mechanism is included to prevent magnetic control mechanism failure, effectively ensuring that even in the event of magnetic control mechanism failure, the fault current can still be manually tripped to cut off the fault current, protecting the safety of power equipment and the system, and reducing fault losses. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-voltage fast switch cabinet integrating a three-magnetic-controlled fast switch proposed in this invention;

[0022] Figure 2 This is a structural schematic diagram of the door body and door components of a high-voltage fast switch cabinet with integrated three magnetic control fast switches proposed in this invention.

[0023] Figure 3 This is a schematic diagram of the internal chamber and pressure relief channel layout of the housing assembly of a high-voltage fast switch cabinet integrating a three-magnetic-controlled fast switch, as proposed in this invention.

[0024] Figure 4 This is a partial structural diagram of the external components and related parts of the core assembly of a high-voltage fast switchgear with integrated three magnetic control fast switches proposed in this invention.

[0025] Figure 5 This is a schematic diagram of the internal structure of the gas box in the core assembly of a high-voltage fast switch cabinet integrating a three-magnetic-controlled fast switch proposed in this invention.

[0026] Figure 6 This is a cross-sectional view of the connection between the iron core and the electromagnetic coil of a high-voltage fast switch cabinet integrating a three-magnetic-controlled fast switch proposed in this invention.

[0027] The markings in the diagram are as follows:

[0028] 1. Mechanism assembly; 11. Gas box; 12. Manual tripping mechanism; 13. Five-proof interlock plate; 14. Isolation mechanism; 15. Isolation lock rod; 16. Measuring sleeve; 17. Air connector; 18. Pressure gauge; 19. Circuit breaker indicator observation window; 110. Three-magnetic control mechanism quick switch; 111. Inner cone sleeve; 112. Busbar copper rod; 113. Explosion-proof valve; 2. Housing assembly; 21. High-voltage chamber; 22. Mechanism chamber; 23. Pressure relief channel; 25. High-voltage chamber door; 26. Protective padlock; 27. Isolation indicator observation window; 28. Tripping operation hole; 29. ​​Isolation operation hole; 210. Grounding operation hole; 3. Secondary top box; 4. Mounting hole; 5. Cable hole; 6. Iron core; 7. Electromagnetic coil. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0030] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] It should be noted that, in this application, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0034] Reference Figures 1 to 6 A high-voltage fast switchgear integrating a three-magnetic-controlled fast switch, comprising:

[0035] The cabinet is composed of a core assembly 1, a housing assembly 2, and a secondary top box 3, wherein:

[0036] The housing assembly 2 is provided with a high-pressure chamber 21, a mechanism chamber 22 and a pressure relief channel 23. The secondary top box 3 is fixed to the top of the housing assembly 2. The mechanism assembly 1 is installed in the inner cavity of the housing assembly 2 and is correspondingly arranged with the high-pressure chamber 21.

[0037] The mechanism assembly 1 includes an air box 11 and a three-magnetic-controlled quick switch 110. The three-magnetic-controlled quick switch 110 is located inside the air box 11, and its three magnetic control units are respectively connected to the three-phase circuit through wires to realize the on-off control of the three-phase circuit. The three-magnetic-controlled quick switch 110 adopts an electromagnetic drive method and is composed of an electromagnetic coil 7 and an iron core 6. When closing, a positive current is injected into the mechanism coil to generate a driving force. The excitation process can generate a driving force sufficient to drive the quick switch to operate in a very short time, thereby driving the quick switch to complete the synchronous closing of the three phases ABC. After closing, the magnetic lines of force of the iron core form a closed loop, and the three-magnetic-controlled mechanism remains in the attracted state. This attracted state is not affected by the subsequent de-energization of the electromagnetic coil, ensuring the stability of closing. During the opening operation, a reverse current is injected into the electromagnetic coil to demagnetize the iron core. After demagnetization, the iron core loses its magnetism, releasing the attracted constraint to drive the quick switch to open, thus meeting the requirements for quick opening.

[0038] The mechanism chamber 22 is located on one side of the high-voltage chamber 21, and the mechanism chamber 22 is used to install the operating mechanism that cooperates with the three magnetic control mechanism quick switch 110.

[0039] This application uses the housing assembly 2 to divide the high-voltage chamber 21, the mechanism chamber 22, and the pressure relief channel 23, clearly isolating the high-voltage components, operating mechanism, and pressure relief path, avoiding mutual interference between different functional components, and providing an environmental basis for the stable operation of the fast switch. The air box of the mechanism assembly 1 constructs a closed operating space for the three-magnetic-controlled fast switch 110. This switch uses the driving structure of the electromagnetic coil 7 and the iron core 6 to generate instantaneous driving force by excitation with positive current, driving the three phases ABC to close synchronously. After closing, the magnetic lines of force of the iron core 6 close to form a stable attraction state, which can maintain the closing without continuous power supply, avoiding the loss of power of traditional mechanical drives. The release of instability; rapid demagnetization of reverse current during tripping releases the engagement constraint and achieves ultra-fast tripping, completely eliminating the delay problems of multiple links and large inertia in traditional mechanical transmission chains; the mechanism compartment 22 provides an installation carrier for the operating mechanism, ensuring coordination between operation and switching actions. It can meet the urgent needs of power systems for rapid interruption of fault current and precise control circuit through rapid response of electromagnetic drive and three-phase synchronous control, solving the defects of insufficient switching speed of traditional switchgear; and through functional zoning layout, it can reduce component interference, improve the overall operational stability of the equipment, and adapt to power scenarios with high requirements for response speed and reliability.

[0040] In the example of this application, the gas box 11 is fitted to the inner wall of the high-pressure chamber 21 by a sealing rubber ring to achieve a sealed fit between the gas box 11 and the high-pressure chamber 21.

[0041] As a preferred example of the present invention, the sealing ring is tightly fitted to the gap between the inner wall of the gas box 11 and the high-voltage chamber 21 to form a continuous and reliable sealing interface. On the one hand, it prevents the insulating gas inside the gas box 11 from leaking outward, ensuring that the gas environment inside the gas box 11 always meets the insulation requirements; on the other hand, it prevents external dust, moisture and other impurities from entering the gas box 11, avoiding impurities from adhering to the surface of conductive parts and causing creepage and flashover accidents. Thus, through the physical barrier effect of the sealing ring, the insulation environment inside the gas box 11 is maintained stably for a long time, providing a guarantee for the safe operation of the three magnetic control mechanism fast switch 110 under high-voltage conditions, making up for the lack of reliability of traditional sealing structures, and ensuring that the insulation performance of the equipment continues to meet the standards.

[0042] In the example of this application, the air box 11 is provided with an aviation plug 17 on the outside, and the secondary top box 3 is connected to the aviation plug 17 through a wire harness to realize the signal and power transmission between the secondary top box 3 and the quick switch 110 of the three magnetic control mechanism inside the air box 11. The secondary top box 3 is made of aluminum zinc plate with a thickness of not less than 2mm, and the top box door panel is made of carbon steel plate with a thickness of not less than 2mm and powder coated with light gray RAL7035.

[0043] As a preferred example of the present invention, the aviation connector 17 serves as an intermediate transfer interface, precisely transmitting signals such as opening and closing commands and electrical energy from the control unit within the secondary top box 3 to the three-magnetic control mechanism fast switch 110 within the air box 11 via a wire harness. This avoids signal interference or poor contact caused by traditional distributed wiring. The secondary top box is made of thick-coated aluminum-zinc plate and powder-coated carbon steel plate, which can resist external corrosion and impact, and also isolate electromagnetic interference. Traditional switchgear often suffers from signal transmission delays due to messy wiring, or the thin and easily deformed and corroded cabinet material affects equipment lifespan and control accuracy. The aviation connector 17 enables standardized wiring, ensuring stable transmission of control signals and electrical energy, allowing the secondary top box 3 to control the switch more accurately. At the same time, the durable material extends the service life of the cabinet, reducing maintenance costs caused by cabinet damage, thus solving the dual problems of signal transmission and structural durability.

[0044] In the example of this application, the high-pressure chamber 21 is provided with a measuring sleeve 16 and an incoming cable. The measuring sleeve 16 is installed in the corresponding mounting hole 4 below the front plate of the gas box 11, and its side away from the gas box 11 extends to the outside of the gas box 11 and is located in the high-pressure chamber 21 for connection with the incoming cable. The measuring sleeve 16 is an ECT / EVT sleeve.

[0045] As a preferred example of the present invention, the measuring sleeve 16 is installed below the front panel of the gas box 11, with one end extending into the gas box 11 and connected to the switching circuit, and the other end extending into the high-voltage chamber 21. The incoming cable is connected to the external connection end of the sleeve inside the high-voltage chamber 21, realizing the orderly connection of the high-voltage circuit, the sleeve, and the external cable inside the gas box 11. At the same time, the sleeve itself has high-voltage isolation performance, preventing high voltage from being directly conducted to the cable connection part. Thus, by integrating the connection and isolation functions through the measuring sleeve 16, the cable connection in the high-voltage chamber 21 is more orderly, reducing short-circuit faults caused by messy wiring. At the same time, the isolation effect of the sleeve improves the connection safety, solving the problems of disordered cable connection and insufficient high-voltage protection in traditional cable connections.

[0046] In the example of this application, a cable hole 5 for cable entry and exit is provided below the high-voltage chamber 21. The cable hole 5 is correspondingly provided with the external connection end of the measuring sleeve 16 so that the incoming cable enters the high-voltage chamber 21 through the cable hole 5 and then connects with the measuring sleeve 16.

[0047] As a preferred example of the present invention, the cable hole 5 below the high-voltage chamber 21 is precisely aligned with the external connection end of the measuring sleeve 16 inside the high-voltage chamber 21. The external incoming cable can directly enter the high-voltage chamber 21 along the cable hole 5 without long-distance bending or pulling to connect with the sleeve. This avoids damage to the insulation layer and conductor due to excessive bending of the cable, or loosening of the joint due to pulling. It also avoids the problem that if the cable hole 5 of the switchgear is misaligned, the cable will have to be forcibly bent to connect, which may lead to insulation aging and increased contact resistance in the long term. The hole-to-sleeve correspondence layout makes the cable installation process smoother, reduces cable stress damage, ensures long-term stable connection between the cable and the sleeve, reduces circuit faults caused by cable installation problems, and provides a guarantee for continuous power supply to the power system.

[0048] In the example of this application, the high-voltage chamber 21 is equipped with a high-voltage chamber door 25, and the operating mechanism installed in the mechanism chamber 22 includes an isolation mechanism 14. An isolation locking rod 15 is provided between the high-voltage chamber door 25 and the isolation mechanism 14. One end of the isolation locking rod 15 is hinged to the high-voltage chamber door 25, and the other end is engaged with the isolation mechanism 14 to realize the linkage locking between the high-voltage chamber door 25 and the isolation mechanism 14.

[0049] As a preferred example of the present invention, one end of the isolation locking rod 15 is hinged to the high-voltage chamber door 25, and the other end is engaged with the isolation mechanism 14 inside the mechanism chamber 22, forming a linkage relationship in which the state of the isolation mechanism 14 determines whether the door can be opened. Only when the isolation mechanism 14 is activated to the grounding state, at which point the circuit inside the high-voltage chamber 21 is completely isolated from the power grid and there is no risk of being energized, will the isolation locking rod 15 release its engagement constraint on the door, allowing the high-voltage chamber door 25 to be opened. If the isolation mechanism 14 is not grounded, the locking rod will firmly lock the door, and even if forced, the door cannot be opened. This avoids the risk of operators accidentally opening the energized high-voltage chamber door 25, which is often caused by the lack of such forced linkage in traditional switchgear. Furthermore, by forcibly standardizing the operating sequence through mechanical structure, the possibility of live maintenance is eliminated from the source, ensuring the personal safety of operators and avoiding damage to equipment caused by misoperation, thus improving the shortcomings of the safety protection mechanism of traditional switchgear.

[0050] In the example of this application, the operating mechanism installed in the mechanism chamber 22 also includes a manual tripping mechanism 12. The manual tripping mechanism 12 is connected to the three magnetic control mechanism quick switch 110 in the gas box 11 through the circuit breaker dynamic seal mounting hole on the front plate of the gas box 11. The isolation mechanism 14 is connected to the three magnetic control mechanism quick switch 110 through the isolation switch dynamic seal mounting hole on the front plate of the gas box 11.

[0051] As a preferred example of the present invention, the circuit breaker dynamic sealing hole and the isolating switch dynamic sealing hole on the front plate of the gas box 11 serve as connection channels between the manual tripping mechanism 12, the isolating mechanism 14, and the fast switch inside the gas box 11, allowing the shaft of the mechanism to pass through the gas box 11 to drive the switch action; and through the elastic sealing element of the dynamic sealing structure, the gap is always filled during the rotation of the shaft, preventing gas exchange between the inside and outside of the gas box 11, ensuring that the sealing performance of the gas box 11 is not affected. When the three magnetic control mechanisms fail due to a fault, the manual tripping mechanism 12 can drive the switch to trip through the circuit breaker dynamic sealing hole, avoiding the predicament of traditional switchgear where the switch cannot trip when a single magnetic control drive fails; the isolating mechanism 14 achieves circuit isolation through the isolating switch dynamic sealing hole, further ensuring safety, providing an emergency tripping scheme for the switch after magnetic control failure, ensuring that the fault current can still be cut off in time; and through the sealing performance of the dynamic sealing hole, maintaining the stability of the insulation environment of the gas box 11, solving the problem that it is difficult to balance emergency operation and sealing performance in traditional switchgear.

[0052] In the example of this application, a five-proof interlock plate 13 is provided between the manual tripping mechanism 12 and the isolation mechanism 14. The five-proof interlock plate 13 is fixed in the mechanism chamber 22, so that the manual tripping mechanism 12 and the isolation mechanism 14 form a mechanical interlock to prevent them from operating at the same time.

[0053] As a preferred example of the present invention, the five-proof interlock plate 13 is fixed inside the mechanism chamber 22. It cooperates with the operating components of the manual tripping mechanism 12 and the isolation mechanism 14 through structures such as protrusions and slots. When the manual tripping mechanism 12 is in the operating state, the protrusion of the interlock plate will block the operating path of the isolation mechanism 14, preventing the isolation mechanism 14 from operating. Conversely, when the isolation mechanism 14 is operating, the interlock plate will also restrict the operating space of the manual tripping mechanism 12, forcing the two to be unable to operate simultaneously. This avoids the possibility of erroneous operation of manual tripping and isolation operating simultaneously, which may occur in traditional switchgear if such interlocking is lacking, resulting in short circuits or switch damage. Furthermore, the mechanical interlocking structure standardizes the operating sequence from a physical perspective, ensuring that operators must operate according to the safe procedure of tripping first and then isolating or releasing isolation first and then closing, avoiding accidents caused by misoperation and improving the safety of equipment operation.

[0054] In the example of this application, the mechanism room 22 is equipped with a mechanism room door 24. The mechanism room door 24 is made of carbon steel plate with a thickness of not less than 2mm, and is powder coated with light gray RAL7035. It is also printed with a primary bus diagram and operation instructions. The mechanism room door 24 is provided with a tripping operation hole 28, an isolation operation hole 29 and a grounding operation hole 210. The tripping operation hole 28 corresponds to the manual tripping mechanism 12. The isolation operation hole 29 and the grounding operation hole 210 are respectively matched with the corresponding operating parts of the isolation mechanism 14. A protective padlock 26 is installed at each of the tripping operation hole 28, the isolation operation hole 29 and the grounding operation hole 210.

[0055] The door 24 of the mechanism is also provided with a pressure gauge observation window 211, a circuit breaker indicator observation window 19 and an isolation indicator observation window 27. The pressure gauge observation window 211 corresponds to the pressure gauge 18 outside the air box 11, the circuit breaker indicator observation window 19 corresponds to the circuit breaker status indicator of the three magnetic control mechanism quick switch 110, and the isolation indicator observation window 27 corresponds to the isolation status indicator of the isolation mechanism 14.

[0056] As a preferred embodiment of the present invention, firstly, the mechanism door 24 is made of thick carbon steel plate with powder coating. The carbon steel plate ensures that the door has sufficient impact and deformation resistance, while the powder coating layer improves corrosion resistance, avoiding the problems of easy rusting and damage of traditional thin doors, and extending the service life of the door. Secondly, the trip operation hole 28, isolation operation hole 29, and grounding operation hole 210 on the door are respectively aligned with the corresponding mechanisms, and each operation hole is equipped with a protective padlock 26, which prevents unauthorized personnel from operating it at will, avoiding equipment failure caused by accidental contact. At the same time, the primary bus diagram printed on the door is consistent with the operation instructions. Firstly, it provides clear guidance for operators, reducing the probability of operational errors. Secondly, the pressure gauge observation window 211, circuit breaker indicator observation window 19, and isolation indicator observation window 27 on the door allow direct viewing of the pressure, switch status, and isolation status of the air box 11. This allows operators to monitor the equipment's operation without opening the door, avoiding interference with internal components and reducing maintenance time. In this way, durable materials and protective padlocks ensure the door's reliability and operational safety, while the observation windows simplify the status monitoring process, comprehensively optimizing the practical value of the mechanism room door 24.

[0057] In the example of this application, the air box 11 is made by laser airtight welding and can withstand a pressure of 0.18 MPa without leaking. It is equipped with a busbar copper rod 112 inside. One end of the busbar copper rod 112 is connected to the lower interface of the three magnetic control mechanism quick switch 110, and the other end is connected to the measuring sleeve 16. The end of the three magnetic control mechanism quick switch 110 away from the busbar copper rod 112 is flexibly connected through the inner conical sleeve 111. The air box 11 is also equipped with an explosion-proof valve 113. The pressure relief direction of the explosion-proof valve 113 corresponds to the pressure relief channel 23 of the shell assembly 2.

[0058] As a preferred example of the present invention, the gas box 11 is made by laser gas-tight welding. The continuous and gapless weld ensures the overall sealing of the gas box 11, avoiding the leakage of insulating gas caused by gaps in traditional welding processes, and maintaining a stable insulating environment inside the gas box 11. The busbar copper rod 112 inside the gas box 11 is directly connected to the three-magnetic-control mechanism quick switch 110 and the measuring sleeve 16. The inner conical sleeve 111 provides a flexible connection to extend the busbar at the other end of the switch. Both use a low-resistance, high-conductivity connection method to ensure smooth circuit conduction and avoid the problems of high contact resistance and high conduction loss found in traditional wire connections. The gas box 11 is explosion-proof. Valve 113 is aligned with the pressure relief channel 23 of housing assembly 2. When the pressure inside the gas box 11 suddenly rises due to a fault, the explosion-proof valve 113 can rupture and release pressure in time. The pressure is discharged from the cabinet through the pressure relief channel 23, preventing the gas box 11 from exploding and causing the accident to escalate. It not only ensures the sealing of the gas box 11 through laser welding, providing a reliable insulation environment for switch operation, but also ensures efficient circuit transmission and reduces energy loss through optimized conduction structure. Furthermore, the cooperation between the explosion-proof valve 113 and the pressure relief channel 23 achieves overpressure protection, improves the safety level of the equipment, and comprehensively solves the core defects of traditional switchgear in terms of gas box 11 sealing, circuit conduction, and safety protection.

[0059] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A high-voltage fast-switching cubicle integrating three magnetic control fast switches, characterized in that, The utility model relates to a kind of high-voltage switch cabinet, including: Cabinet body, the cabinet body is by movement core component (1), shell assembly (2) and secondary top box (3) are constituted, wherein: The shell assembly (2) is equipped with high-pressure chamber (21), mechanism chamber (22) and pressure relief channel (23), the secondary top box (3) is installed with quick protection fixed in the top of shell assembly (2), the movement core component (1) is installed in the inner chamber of shell assembly (2) and with high-pressure chamber (21) corresponding arrangement; The movement core component (1) includes gas tank (11) and three magnetic control mechanism quick switch (110), the three magnetic control mechanism quick switch (110) is set in gas tank (11) inside, and three magnetic control units thereof are respectively connected with three-phase circuit corresponding connection by wire, for realizing the on-off control of three-phase circuit; The mechanism chamber (22) is located at one side of the high-pressure chamber (21), and the mechanism chamber (22) is used for installing the operating mechanism matched with the three magnetic control mechanism quick switch (110). The high-pressure chamber (21) is equipped with a measuring sleeve (16), which is deeply integrated with the traditional 202 sleeve and designed in a front-back separation type. The EVT circuit includes an EVT phase voltage detection circuit, an EVT zero sequence voltage detection circuit, and an EVT capacitor voltage division power supply circuit.

2. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, The gas tank (11) is attached to the inner wall of the high-pressure chamber (21) through a sealing rubber ring to realize the sealing cooperation between the gas tank (11) and the high-pressure chamber (21).

3. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, The gas tank (11) is externally provided with a navigation plug (17), and the secondary top box (3) is connected with the navigation plug (17) through a wire bundle to realize the signal and power transmission between the secondary top box (3) and the three magnetic control mechanism quick switch (110) in the gas tank (11).

4. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, The high-pressure chamber (21) is equipped with a measuring sleeve (16) and an incoming line cable, the measuring sleeve (16) is installed in the corresponding mounting hole (4) below the front plate of the gas tank (11), and the side away from the gas tank (11) extends to the outside of the gas tank (11) and is located in the high-pressure chamber (21) for connection with the incoming line cable.

5. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, A cable hole (5) for the incoming and outgoing of the cable is formed below the high-pressure chamber (21), the cable hole (5) is correspondingly arranged with the external connection end of the measuring sleeve (16) so that the incoming line cable can be connected with the measuring sleeve (16) after entering the high-pressure chamber (21) through the cable hole (5).

6. The integrated triple-magnet fast switching high voltage switchgear of claim 5, wherein, The high-pressure chamber (21) is provided with a high-pressure chamber door (25), the operating mechanism installed in the mechanism chamber (22) includes an isolation mechanism (14), an isolation lock rod (15) is arranged between the high-pressure chamber door (25) and the isolation mechanism (14), one end of the isolation lock rod (15) is hinged with the high-pressure chamber door (25), and the other end is clamped with the isolation mechanism (14) to realize the linkage locking of the high-pressure chamber door (25) and the isolation mechanism (14).

7. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, The operating mechanism installed in the mechanism chamber (22) further includes a manual opening and closing mechanism (12), the manual opening and closing mechanism (12) is correspondingly connected with the three magnetic control mechanism quick switch (110) in the gas tank (11), and the isolation mechanism (14) is correspondingly connected with the three magnetic control mechanism quick switch (110).

8. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, The manual opening mechanism (12) and the isolation mechanism (14) are provided with a five-prevention interlocking plate (13) fixed in the mechanism chamber (22), so that the manual opening mechanism (12) and the isolation mechanism (14) are mechanically interlocked to avoid simultaneous operation.

9. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, The mechanism chamber (22) is provided with a mechanism chamber door (24) having an opening operation hole (28), an isolation operation hole (29) and a grounding operation hole (210) formed therein, the opening operation hole (28) corresponding to the manual opening mechanism (12), the isolation operation hole (29) and the grounding operation hole (210) respectively matching corresponding operation parts of the isolation mechanism (14), and a protection padlock (26) being installed at each of the opening operation hole (28), the isolation operation hole (29) and the grounding operation hole (210). The mechanism chamber door (24) is further provided with an air pressure gauge observation window (211), a circuit breaker indication observation window (19) and an isolation indication observation window (27), the air pressure gauge observation window (211) corresponding to an air pressure gauge (18) outside the air tank (11), the circuit breaker indication observation window (19) corresponding to a circuit breaker state indicator of the three-magnetic control mechanism quick switch (110), and the isolation indication observation window (27) corresponding to an isolation state indicator of the isolation mechanism (14).

10. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, The air tank (11) is made of laser air-tight welding, and is internally provided with a busbar copper rod (112), one end of the busbar copper rod (112) being connected to a lower end of the three-magnetic control mechanism quick switch (110), and the other end being connected to a measuring sleeve (16), the three-magnetic control mechanism quick switch (110) being connected to the busbar copper rod (112) through an inner cone sleeve (111), and the air tank (11) is further provided with an explosion-proof valve (113), the pressure relief direction of the explosion-proof valve (113) corresponding to a pressure relief channel (23) of the shell assembly (2).

11. The integrated triple-magnet fast switching high voltage switchgear of claim 1, wherein, The measuring sleeve (8) is deeply integrated with a conventional 202 sleeve, and is designed in a separated manner, and is divided into a front half part and a rear half part, the front half part being used for extending into the ring network cabinet, and the rear half part being used for connecting a cable connector, and being internally provided with a voltage dividing capacitor for power supply, a low-power coil circuit for power supply and wireless signal transmission of equipment, and a signal setting part for providing current, phase sequence voltage and zero sequence voltage in a hall.

12. The integrated triple-magnetic-field fast switch high-voltage fast switchgear according to claim 1, characterized in that The top tank (3) is provided with a short-circuit fault quick protection, the measuring sleeve (8) is connected to the short-circuit protection through wired power supply, and current and voltage signals collected by the measuring sleeve (8) are transmitted to the short-circuit fault quick protection through wireless transmission for remote control and remote measurement.

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