CGIS plug-in PT cabinet

Abstract

The application relates to the technical field of box-type gas insulated switch cabinets, and particularly discloses a CGIS plug-in type PT cabinet which comprises a cabinet shell, a cabinet door rotatably connected to the front side of the cabinet shell, and a connecting mechanism arranged at the lower side of the cabinet shell and used for facilitating lifting. The CGIS plug-in type PT cabinet is characterized in that a temperature sensor is used to monitor the temperature inside the cabinet in real time and feed back to a PLC controller; when the temperature is high, a ventilation fan is automatically started to cooperate with the upper and lower filter screens to ventilate and dissipate heat, heat dissipation and air-tight pressure maintenance are considered, dust and water vapor are prevented from entering the inside of the cabinet; the first moving plate and the second moving plate are clamped and positioned through a plug-in plate and a plug-in slot; and a sealing gasket further strengthens the sealing performance of the inside of the cabinet. After the cabinet is adjusted to a specified height, an electric telescopic rod pushes a plug-in rod to pass through a first connecting hole and a second connecting hole to complete locking, a limiting seat is used to limit the position of the plug-in rod, height fixing is quickly completed, the traditional screwing mode is abandoned, and the leveling and locking efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of box-type gas-insulated switchgear technology, specifically a CGIS plug-in PT cabinet. Background Technology

[0002] CGIS plug-in PT cabinets (box-type gas-insulated switchgear with voltage transformer cabinets) belong to SF6 gas-insulated metal-enclosed complete power distribution equipment. Their core feature is that the voltage transformer (PT) uses a plug-in / plug-out structure to connect to the CGIS sealed gas chamber busbar, unlike traditional air-insulated switchgear with fixed bolt connections or conventional CGIS built-in fixed PT solutions. The mainstream voltage levels are 12kV / 24kV / 40.5kV. Box-type gas-insulated switchgear, commonly known in the industry as gas-filled switchgear, has all its internal high-voltage conductive components sealed in a metal gas chamber, filled with SF6 gas as the insulation and arc-extinguishing medium. Its plug-in structure is merely a way to disassemble and assemble the PT unit; the cabinet's basic form remains gas-filled, unlike older fixed-wiring gas-filled PT cabinets, but the fundamental category remains unchanged.

[0003] For example, Chinese patent CN216530160U discloses a novel high-voltage gas-filled switchgear. This novel high-voltage gas-filled switchgear, through the arrangement of a fixed frame, a drive motor, a connecting shaft, and fan blades, allows the drive motor to rotate the connecting shaft during use, thereby causing the connecting shaft to rotate the fan blades, which can accelerate airflow. Then, in conjunction with the second ventilation hole on the partition and the first ventilation holes on both sides of the outer cabinet, air circulation can be formed, thereby effectively dissipating heat from the inner cabinet.

[0004] For example, Chinese patent CN219611194U discloses a 10kV 1250A gas-insulated high-voltage switchgear. By inserting bolts into through holes at corresponding heights on the surface of the connecting sleeve, the entire device can be fixed at a specified height. By tightening nuts, the bolts can securely connect the connecting rod and the connecting sleeve. Through the busbar compartment, circuit breaker compartment, cable compartment, secondary compartment, and mechanism compartment opened inside the cabinet, the equipment has the characteristics of compact size, high reliability, good safety, elimination of adverse external influences, short installation cycle, convenient maintenance, and long maintenance cycle.

[0005] Existing gas-insulated switchgear comes in two types: one uses a fan-ventilated heat dissipation structure, making it difficult to maintain a stable, sealed, and pressure-bearing environment in the cabinet's air chamber over a long period; the other relies on bolts for height fixing, making leveling and disassembly cumbersome. Neither type of traditional equipment is equipped with a plug-and-play compatible linkage seal or a convenient lifting and adjustment structure, resulting in poor airtight protection during operation and inconvenient cabinet leveling, transformer disassembly, and maintenance. Therefore, there is room for further improvement.

[0006] Therefore, we propose a CGIS plug-in PT cabinet to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a CGIS plug-in PT cabinet to address the problems mentioned in the background art regarding existing gas-insulated switchgear. One type uses a fan-ventilated heat dissipation structure, making it difficult to maintain a stable, sealed, and pressure-bearing environment in the cabinet's air chamber over a long period; the other type relies on bolt alignment and locking for height fixation, resulting in cumbersome leveling and disassembly operations. Neither type of traditional equipment is equipped with a plug-in compatible linkage seal or convenient lifting and adjustment structure, leading to poor airtight protection during operation and inconvenient cabinet leveling, transformer disassembly, and maintenance. Therefore, there is still room for further improvement.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a CGIS plug-in PT cabinet, comprising:

[0009] The cabinet shell has a cabinet door rotatably connected to its front side;

[0010] Also includes:

[0011] The cabinet shell has an internal control mechanism for easy sealing and dust prevention. A vertical plate is located on the inner side of the cabinet shell, and a bidirectional threaded rod is rotatably connected to the side of the vertical plate. A detachable mechanism for maintaining a tight seal is located on the outer side of the bidirectional threaded rod. The control mechanism consists of a temperature sensor, a PLC controller, a bidirectional threaded rod, and a limit rod. The detachable mechanism consists of a first moving plate, a second moving plate, a sealing plate, and connecting bolts.

[0012] The lower side of the cabinet shell is provided with a connecting mechanism for easy lifting and lowering, and the lower side of the cabinet shell is provided with a support leg, and the side of the support leg is provided with a plug-in mechanism for easy limiting; the connecting mechanism is composed of a support leg, a hollow cylinder, a hydraulic cylinder and a support frame, and the plug-in mechanism is composed of a plug-in rod, a limiting seat and an electric telescopic rod.

[0013] Preferably, a door frame sealing strip is provided on the rear side of the cabinet door, and the door frame sealing strip is tightly fitted to the cabinet shell. A rain shield is provided on the upper side of the cabinet shell, and an exhaust fan is provided on the upper side of the cabinet shell. An upper filter screen is provided on the upper side of the exhaust fan, and a lower filter screen is provided on the lower side of the cabinet shell.

[0014] Preferably, a temperature sensor is provided on the inner side of the cabinet shell, a PLC controller is provided on the outer side of the cabinet shell, an internal installation platform is provided on the lower inner side of the cabinet shell, and a CGIS plug-in PT core airtight air box body is provided on the upper side of the internal installation platform.

[0015] Preferably, the vertical plate is symmetrical about the horizontal central axis of the cabinet shell, and a servo motor is provided on the side of the vertical plate. The output shaft of the servo motor is fixedly connected to a bidirectional threaded rod, and a limit rod is provided on the inner side of the vertical plate.

[0016] Preferably, the bidirectional threaded rod is threadedly driven by both the first moving plate and the second moving plate, and the first moving plate and the second moving plate are symmetrical about the vertical central axis of the limiting rod. The side of the first moving plate is provided with a plug-in plate, and the first moving plate is engaged with the plug-in groove, and the plug-in groove is opened on the side of the second moving plate.

[0017] Preferably, the upper sides of the first movable plate and the second movable plate are tightly fitted to the sealing plate, and a sealing gasket is provided on the upper side of the sealing plate. The sealing gasket is tightly fitted to the inner side of the cabinet shell, and the sealing plate is fixedly connected to the first movable plate and the second movable plate by connecting bolts.

[0018] Preferably, the connecting bolts are arranged in an array, and both the first and second moving plates are slidably connected to the limiting groove, the limiting groove is fixedly connected to the outer shell of the cabinet, and the limiting groove corresponds one-to-one with the vertical plate.

[0019] Preferably, the lower side of the cabinet shell is provided with support legs, and the support legs are distributed in an array. The support legs are slidably connected to the hollow cylinder, and the hollow cylinder is located on the upper side of the base plate. The base plate is slidably connected with mounting screws, and the mounting screws are distributed in an array.

[0020] Preferably, the support leg has a first connecting hole inside, and the first connecting holes are arranged in an array, and the hollow cylinder has a second connecting hole inside, and both the first connecting hole and the second connecting hole are slidably connected to the plug rod.

[0021] Preferably, the plug-in rod is slidably connected to the limiting seat, and the plug-in rod is symmetrical about the vertical central axis of the cabinet shell. The limiting seat is fixedly connected to the cabinet shell, and a support frame is provided on the lower side of the cabinet shell. The support frame is connected to the output end of the hydraulic cylinder, and the hydraulic cylinder is located on the upper side of the base plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The CGIS plug-in PT cabinet uses a temperature sensor to monitor the internal temperature of the cabinet in real time and feed it back to the PLC controller. When the temperature is high, the ventilation fan is automatically activated in conjunction with the upper and lower filters for ventilation and heat dissipation, taking into account both heat dissipation and airtight pressure maintenance, and preventing dust and moisture from entering the cabinet. The first moving plate and the second moving plate are positioned by plug-in plates and plug-in slots, and the sealing gasket further enhances the internal sealing of the cabinet. After the cabinet is adjusted to the specified height, the electric telescopic rod pushes the plug-in rod through the first connection hole and the second connection hole to complete the locking. The position of the plug-in rod is limited by the limit seat, and the height is quickly fixed, eliminating the traditional method of tightening bolts one by one, and the leveling and locking efficiency is greatly improved.

[0023] 1. Equipped with a control mechanism, ventilation fan, and filter screen, the temperature sensor monitors the internal temperature of the cabinet in real time and feeds it back to the PLC controller. When the temperature is high, the ventilation fan will automatically start to work with the upper and lower filters to ventilate and dissipate heat. When the temperature is low, the sealing structure will work to achieve full sealing, taking into account both heat dissipation and airtight pressure maintenance, and preventing dust and moisture from entering the cabinet.

[0024] 2. It is equipped with a vertical plate, a servo motor, a bidirectional threaded rod, and a limit rod. The servo motor drives the bidirectional threaded rod to rotate. Under the limiting and guiding action of the limit rod, it drives the first moving plate and the second moving plate to move synchronously towards or away from each other, realizing the opening and closing of the sealing area. It has a high degree of automation and the sealing action is precise and stable.

[0025] 3. It is equipped with a detachable mechanism, plug-in plate, plug-in slot, sealing plate, and sealing gasket. The first moving plate and the second moving plate are positioned by the plug-in plate and plug-in slot, and the sealing plate is fixed with connecting bolts. The sealing gasket further enhances the internal sealing of the cabinet. At the same time, the overall disassembly and assembly are simple, which facilitates the later inspection and replacement of the CGIS plug-in PT core airtight air box body.

[0026] 4. It is equipped with a connecting mechanism, support legs, hollow cylinder, hydraulic cylinder, and support frame. The hydraulic cylinder drives the cabinet to rise and fall as a whole through the support frame. The support legs slide and guide inside the hollow cylinder. The height and level of the cabinet can be flexibly adjusted according to the on-site installation requirements to adapt to different installation sites.

[0027] 5. Equipped with a plug-in mechanism, plug-in rod, limit seat, and electric telescopic rod, after the cabinet is adjusted to the specified height, the electric telescopic rod pushes the plug-in rod through the first connection hole and the second connection hole to complete the locking. The limit seat restricts the position of the plug-in rod, quickly completing the height fixation. This eliminates the traditional method of tightening bolts one by one, greatly improving the efficiency of leveling and locking. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a first-view structural diagram of the entire invention;

[0030] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;

[0031] Figure 3 This is a schematic diagram of the connection structure between the cabinet shell and the cabinet door of the present invention;

[0032] Figure 4 This is a schematic diagram of the cross-sectional structure of the cabinet shell of the present invention;

[0033] Figure 5 This is a schematic diagram of the connection structure of the bidirectional threaded rod, the first movable plate, and the second movable plate of the present invention.

[0034] Figure 6 This is a schematic diagram of the connection structure between the sealing plate and the sealing gasket of the present invention;

[0035] Figure 7 This is a schematic diagram of the explosive structure of the support leg and hollow cylinder of the present invention.

[0036] In the diagram: 1. Cabinet shell; 2. Cabinet door; 3. Door frame sealing strip; 4. Rain guard; 5. Exhaust fan; 6. Upper filter; 7. Lower filter; 8. Temperature sensor; 9. PLC controller; 10. Internal mounting platform; 11. CGIS plug-in PT core airtight air box body; 12. Vertical plate; 13. Servo motor; 14. Bidirectional threaded rod; 15. First moving plate; 16. Plug-in plate; 17. Plug-in slot; 18. Second moving plate; 19. Sealing plate; 20. Sealing gasket; 21. Limiting rod; 22. Limiting slot; 23. Support leg; 24. Hollow cylinder; 25. Base plate; 26. First connecting hole; 27. Second connecting hole; 28. Plug-in rod; 29. ​​Limiting seat; 30. Electric telescopic rod; 31. Hydraulic cylinder; 32. Support frame; 33. Mounting screw; 34. Connecting bolt. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Please see Figures 1-7 This invention provides a technical solution: a CGIS plug-in PT cabinet, comprising: a cabinet shell 1, a cabinet door 2, a door frame sealing strip 3, a rain shield 4, a ventilation fan 5, an upper filter screen 6, a lower filter screen 7, a temperature sensor 8, a PLC controller 9, an internal mounting platform 10, a CGIS plug-in PT core airtight air box body 11, a vertical plate 12, a servo motor 13, a bidirectional threaded rod 14, a first moving plate 15, a plug-in plate 16, a plug-in groove 17, a second moving plate 18, a sealing plate 19, a sealing gasket 20, a limiting rod 21, a limiting groove 22, a support leg 23, a hollow cylinder 24, a base plate 25, a first connecting hole 26, a second connecting hole 27, a plug-in rod 28, a limiting seat 29, an electric telescopic rod 30, a hydraulic cylinder 31, a support frame 32, mounting screws 33, and connecting bolts 34.

[0039] Existing gas-insulated switchgear comes in two types: one uses a fan-ventilated heat dissipation structure, making it difficult to maintain a stable, sealed, and pressure-bearing environment in the cabinet's air chamber over a long period; the other relies on bolts for height fixing, making leveling and disassembly cumbersome. Neither type of traditional equipment is equipped with a plug-and-play compatible linkage seal or a convenient lifting and adjustment structure, resulting in poor airtight protection during operation and inconvenient cabinet leveling, transformer disassembly, and maintenance. Therefore, there is room for further improvement.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, during the equipment installation phase, the base plate 25 is first placed stably in the designated installation area. Using the array of mounting screws 33 on the base plate 25, it is firmly locked and fixed to the ground foundation, thus solidifying the bottom base of the entire equipment and ensuring the stability of the overall structure. Multiple sets of support legs 23 at the bottom of the cabinet shell 1 are inserted one by one into the hollow cylinder 24 provided above the base plate 25. The hollow cylinder 24 provides good sliding guidance and radial limitation for the support legs 23, ensuring smooth cooperation between them. A cabinet door 2 is rotatably mounted on the front of the cabinet shell 1. A door frame sealing strip 3 is fixedly installed on the rear of the cabinet door 2. When the cabinet door 2 is fully closed, the door frame sealing strip 3 will tightly adhere to the end face of the cabinet shell 1, achieving basic sealing protection at the cabinet door 2 position. The top of the cabinet shell 1 is equipped with a rain shield 4, which can effectively block outdoor rainwater and falling debris from entering the cabinet. The top is also equipped with an exhaust fan 5, and a filter screen 6 is installed above the exhaust fan 5. A lower filter screen 7 is installed at the bottom of the cabinet shell 1. The two sets of filters work together to effectively block dust and insects from entering the cabinet shell 1 during ventilation operations.

[0041] like Figure 3 , Figure 7As shown, when the on-site working conditions require adjustment of the overall height and level of the cabinet shell 1, the hydraulic cylinder 31 installed on the base plate 25 is activated. The output end of the hydraulic cylinder 31 is fixedly connected to the support frame 32, and the support frame 32 supports the cabinet shell 1 as a whole. When the hydraulic cylinder 31 extends or retracts, it can drive the cabinet shell 1 to rise and fall synchronously. During the lifting and lowering process, the support legs 23 at the bottom of the cabinet shell 1 will slide smoothly vertically along the inside of the hollow cylinder 24. Multiple sets of support legs 23 around the equipment work together to accurately complete the height adjustment and level calibration of the cabinet shell 1. After the cabinet shell 1 is adjusted to the preset working height, the first connecting hole 26 opened inside the support leg 23 will be precisely aligned with the second connecting hole 27 opened inside the hollow cylinder 24. Then, the electric telescopic rod 30 on the lower side of the cabinet shell 1 is activated. The electric telescopic rod 30 extends and pushes the plug-in rod 28 to move. The plug-in rod 28 slides and is guided inside the limiting seat 29, passing through the second connecting hole 27 and the first connecting hole 26 in sequence, locking and fixing the support leg 23 and the hollow cylinder 24, thus completing the height positioning of the cabinet shell 1. The limiting seat 29 axially limits the plug-in rod 28 to prevent it from slipping under force, ensuring the long-term stability of the locking structure. If the cabinet height needs to be adjusted again later, simply control the electric telescopic rod 30 to retract, causing the plug-in rod 28 to be pulled out of the hole, and then the hydraulic cylinder 31 can be operated again to carry out the lifting operation.

[0042] like Figure 4 , Figure 5 , Figure 6 As shown, when the equipment enters normal operation, the temperature sensor 8 installed inside the cabinet shell 1 continuously collects the ambient temperature inside the cabinet in real time and transmits the collected temperature data to the PLC controller 9 installed on the outside of the cabinet shell 1. When the temperature inside the cabinet shell 1 exceeds the system's preset threshold, the PLC controller 9 automatically starts the ventilation fan 5. Outside air enters the cabinet after being filtered through the upper filter screen 6, while the hot air accumulated inside the cabinet is discharged through the lower filter screen 7, forming a complete circulating airflow to achieve ventilation and heat dissipation inside the cabinet. When the temperature inside the cabinet is within the normal range, or when the equipment needs to be operated under airtight pressure, the PLC controller 9 triggers the servo motor 13 installed on the side of the vertical plate 12 to work. The output shaft of the servo motor 13 is rigidly connected to the bidirectional threaded rod 14, thereby driving the bidirectional threaded rod 14 to rotate continuously. The bidirectional threaded rod 14 forms a threaded transmission structure with the first moving plate 15 and the second moving plate 18 respectively. Together with the limiting rod 21 installed on the inner side of the vertical plate 12 and the limiting groove 22 fixed inside the cabinet shell 1, they restrict the first moving plate 15 and the second moving plate 18 from rotating circumferentially, so that the two plates can only move in a straight line in the horizontal direction.

[0043] When the bidirectional threaded rod 14 rotates in the forward direction, it simultaneously drives the first moving plate 15 and the second moving plate 18 to move closer together. The plug-in plate 16 integrally provided on the side of the first moving plate 15 precisely engages into the plug-in groove 17 opened on the side of the second moving plate 18, achieving precise docking and positioning of the two moving plates. After docking, the upper surfaces of the first moving plate 15 and the second moving plate 18 jointly support the sealing plate 19. The sealing plate 19 is securely connected to the first moving plate 15 and the second moving plate 18 as a whole by means of multiple sets of connecting bolts 34 arranged in an array. A sealing gasket 20 is fitted onto the upper surface of the sealing plate 19. When compressed, the sealing gasket 20 fits tightly against the inner wall of the cabinet shell 1, separating and sealing the internal space of the cabinet shell 1.

[0044] An internal mounting platform 10 is located at the bottom of the cabinet shell 1. The CGIS plug-in PT core airtight air box body 11 is placed on the internal mounting platform 10. The airtight structure can ensure that the cavity in which the body is located maintains a stable airtight pressure environment, effectively preventing the leakage of internal SF6 gas, while blocking the intrusion of external dust, water vapor and other impurities. It should be noted that the temperature sensor 8 is an integrated PT100 and the PLC controller 9 is a Siemens S7-200SMARTSR40.

[0045] During the equipment operation and maintenance phase, if it is necessary to carry out maintenance, disassembly, or component replacement operations on the internal structure of the cabinet shell 1 and the CGIS plug-in PT core airtight air box body 11 located on the top of the internal installation platform 10, rotate and open the cabinet door 2.

[0046] When it is necessary to inspect the sealing plate 19 inside the cabinet shell 1, first turn and open the cabinet door 2, then unscrew all the connecting bolts 34 in sequence, and the sealing plate 19 along with the sealing gasket 20 can be removed. Then, control the servo motor 13 to rotate in reverse, and the bidirectional threaded rod 14 will rotate in reverse, causing the first moving plate 15 and the second moving plate 18 to separate in opposite directions, and the plug plate 16 to completely disengage from the plug slot 17, and the sealed area inside the cabinet is completely opened. The entire disassembly and assembly process is simple, convenient and efficient.

[0047] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A CGIS plug-in PT cabinet, comprising: Cabinet shell (1), the front side of which is rotatably connected to a cabinet door (2); Its characteristic is that it further includes: The cabinet shell (1) is provided with a control mechanism for convenient sealing and dust prevention. The cabinet shell (1) is provided with a vertical plate (12) on the inner side. The vertical plate (12) is rotatably connected to a two-way threaded rod (14) on the side. The two-way threaded rod (14) is provided with a detachable mechanism for convenient sealing. The control mechanism is composed of a temperature sensor (8), a PLC controller (9), a two-way threaded rod (14) and a limit rod (21). The detachable mechanism is composed of a first moving plate (15), a second moving plate (18), a sealing plate (19) and a connecting bolt (34). The lower side of the cabinet shell (1) is provided with a connecting mechanism for easy lifting and lowering, and the lower side of the cabinet shell (1) is provided with a support leg (23), and the side of the support leg (23) is provided with a plug-in mechanism for easy positioning; the connecting mechanism is composed of a support leg (23), a hollow cylinder (24), a hydraulic cylinder (31) and a support frame (32), and the plug-in mechanism is composed of a plug-in rod (28), a limiting seat (29) and an electric telescopic rod (30).

2. The CGIS plug-in PT cabinet according to claim 1, characterized in that: The cabinet door (2) is provided with a door frame sealing strip (3) on the back side, and the door frame sealing strip (3) is tightly fitted with the cabinet shell (1). The cabinet shell (1) is provided with a rain shield (4) on the upper side, and a ventilation fan (5) is provided on the upper side of the cabinet shell (1). The ventilation fan (5) is provided with an upper filter screen (6) on the upper side, and a lower filter screen (7) is provided on the lower side of the cabinet shell (1).

3. The CGIS plug-in PT cabinet according to claim 1, characterized in that: A temperature sensor (8) is provided on the inner side of the cabinet shell (1), and a PLC controller (9) is provided on the outer side of the cabinet shell (1). An internal installation platform (10) is provided on the lower inner side of the cabinet shell (1), and a CGIS plug-in PT core airtight air box body (11) is provided on the upper side of the internal installation platform (10).

4. A CGIS plug-in PT cabinet according to claim 1, characterized in that: The vertical plate (12) is symmetrical about the horizontal central axis of the cabinet shell (1), and a servo motor (13) is provided on the side of the vertical plate (12). The output shaft of the servo motor (13) is fixedly connected to the bidirectional threaded rod (14), and a limit rod (21) is provided on the inner side of the vertical plate (12).

5. A CGIS plug-in PT cabinet according to claim 4, characterized in that: The bidirectional threaded rod (14) is threadedly driven by the first moving plate (15) and the second moving plate (18), and the first moving plate (15) and the second moving plate (18) are symmetrical about the vertical central axis of the limiting rod (21). The side of the first moving plate (15) is provided with a plug plate (16), and the first moving plate (15) is engaged with the plug groove (17). The plug groove (17) is opened on the side of the second moving plate (18).

6. A CGIS plug-in PT cabinet according to claim 5, characterized in that: The upper sides of the first movable plate (15) and the second movable plate (18) are tightly fitted to the sealing plate (19), and the upper side of the sealing plate (19) is provided with a sealing gasket (20), and the sealing gasket (20) is tightly fitted to the inner side of the cabinet shell (1), and the sealing plate (19) is fixedly connected to the first movable plate (15) and the second movable plate (18) by connecting bolts (34).

7. A CGIS plug-in PT cabinet according to claim 6, characterized in that: The connecting bolts (34) are arranged in an array, and the first moving plate (15) and the second moving plate (18) are slidably connected to the limiting groove (22), and the limiting groove (22) is fixedly connected to the cabinet shell (1), and the limiting groove (22) corresponds one-to-one with the vertical plate (12).

8. A CGIS plug-in PT cabinet according to claim 1, characterized in that: The lower side of the cabinet shell (1) is provided with support legs (23), and the support legs (23) are arranged in an array. The support legs (23) are slidably connected to the hollow cylinder (24), and the hollow cylinder (24) is arranged on the upper side of the base plate (25). The interior of the base plate (25) is slidably connected with mounting screws (33), and the mounting screws (33) are arranged in an array.

9. A CGIS plug-in PT cabinet according to claim 8, characterized in that: The support leg (23) has a first connecting hole (26) inside, and the first connecting hole (26) is arranged in an array. The hollow cylinder (24) has a second connecting hole (27) inside, and both the first connecting hole (26) and the second connecting hole (27) are slidably connected to the plug rod (28).

10. A CGIS plug-in PT cabinet according to claim 9, characterized in that: The plug rod (28) is slidably connected to the limiting seat (29), and the plug rod (28) is symmetrical about the vertical central axis of the cabinet shell (1). The limiting seat (29) is fixedly connected to the cabinet shell (1). A support frame (32) is provided on the lower side of the cabinet shell (1). The support frame (32) is connected to the output end of the hydraulic cylinder (31). The hydraulic cylinder (31) is located on the upper side of the base plate (25).

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