A kind of box-type transformer control cabinet anti-vibration buffer device

Abstract

The application relates to the technical field of transformer components, and discloses a vibration-resistant buffering device for a box-type transformer control cabinet, which comprises a cabinet body assembly, the cabinet body assembly comprises a cabinet face main body, a scissor link assembly is mounted on the inner side of the bottom of the cabinet face main body, permanent magnets one and two are mounted on the bottom of the scissor link assembly, a spiral spring is mounted on the top of the permanent magnet one, a transformer control module is mounted on the inner side of the cabinet face main body, an acceleration sensor is mounted on the front of the transformer control module, a cylinder barrel is mounted on the top of the transformer control module, air shrink assemblies are mounted on the two sides of the transformer control module, servo motors are mounted on the two sides of the cabinet face main body, a rack is mounted on the front of the servo motor, the scissor link assembly cooperates with the permanent magnets one and two, and the problems that the vibration isolation capacity of traditional rubber or spring pads in the horizontal direction is weak and resonance amplification is easily generated at specific frequencies are solved.

Description

Technical Field

[0001] This invention relates to the field of transformer component technology, and more specifically to a vibration damping device for a box-type transformer control cabinet. Background Technology

[0002] The vibration damping device for prefabricated transformer control cabinets is a specialized protective component that isolates foundation vibration, transformer electromagnetic vibration, short-circuit impact, earthquakes, and transportation bumps, protecting precision components such as secondary instruments, relay protection, circuit breakers, and terminals from loosening, malfunction, insulation damage, and poor contact. It is widely used in photovoltaic, wind power, and municipal prefabricated substations. It is a vibration damping device directly integrated into the bottom of the transformer. Most existing vibration damping devices use rubber or spring pads to isolate or mitigate vibration. However, while traditional rubber or spring pads are effective in the vertical direction, their ability to isolate horizontal vibrations, such as wind loads and start-up / shutdown impacts, is weak, and they are prone to resonance amplification at specific frequencies. Furthermore, conventional damping devices have fixed stiffness; normal operation requires low stiffness to isolate micro-vibrations, while faults such as short circuits generate huge impacts, and low stiffness can lead to excessive displacement and impact on the cabinet. Therefore, we provide a vibration damping device for prefabricated transformer control cabinets to solve the above problems. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a vibration damping device for a box-type transformer control cabinet to solve the problems existing in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a vibration damping device for a box-type transformer control cabinet, comprising a cabinet assembly, the cabinet assembly comprising a cabinet body, a scissor linkage assembly installed on the inner bottom of the cabinet body, a permanent magnet one and a permanent magnet two installed at the bottom of the scissor linkage assembly, a helical spring installed on the top of the permanent magnet one, a transformer control module installed on the inner side of the cabinet body, an acceleration sensor installed on the front of the transformer control module, a cylinder installed on the top of the transformer control module, air compression assemblies installed on both sides of the transformer control module, servo motors installed on both sides of the cabinet body, and racks installed on the front of the servo motors; The scissor link assembly cooperates with permanent magnet one and permanent magnet two to counteract the positive stiffness of the helical spring, making the total stiffness of the device approach zero and achieving ultra-low frequency vibration isolation. The acceleration sensor triggers the cylinder to draw air from the air compression assembly, causing the sealed bladder to contract into a rigid body and disperse the impact force to the external reinforcing frame. The air compression assembly includes a sealing bladder. When the sealing bladder is in a vacuum state, the distance between the outer side of the sealing bladder and the inner wall of the cabinet body is equal to the distance the rack moves. The rack is driven by a servo motor to compensate for the distance when the sealing bladder is vacuumed and contracted, so that the sealing bladder is in rigid contact with the cabinet body.

[0005] Furthermore, a stiffness buffer component is fixedly connected to the inner side of the bottom of the cabinet assembly, and a variable stiffness component is fixedly connected to the top of the stiffness buffer component.

[0006] Furthermore, the cabinet assembly includes a cabinet body, a sealed cabinet door is rotatably connected to one end of the front of the cabinet body, the front of the sealed cabinet door is provided with a glass window, one end of the sealed cabinet door is provided with a handle, and a shell assembly is fixedly sleeved on both sides of the cabinet body, and the shell assembly is located on the outside of both sides of the cabinet body.

[0007] Furthermore, the shell assembly includes an outer shell, which is fixedly fitted onto both sides of the main body of the cabinet and located outside the main body of the cabinet. A guide rail is fixedly connected to the inner side of the bottom of the outer shell, and a rack is slidably fitted onto the top of the guide rail. A pressure plate is fixedly connected to one end of the rack. A servo motor is fixedly connected to the inner side of the back of the outer shell. A rotating shaft is fixedly connected to the drive end of the servo motor, and a gear is fixedly connected to one end of the rotating shaft, and the gear meshes with the rack.

[0008] Furthermore, the stiffness buffer assembly includes a mounting base, and a plurality of scissor buffer assemblies are fixedly connected to the bottom of the mounting base. The bottom of the scissor buffer assembly is fixedly connected to the inner side of the bottom of the main body of the cabinet.

[0009] Furthermore, the scissor lift buffer assembly includes a scissor lift linkage assembly, which consists of two lead screws and an intermediate shaft. The two lead screws are placed crosswise, and the intermediate shaft rotatably connects the two lead screws.

[0010] Furthermore, both of the two lead screws are hinged to connecting seats at their top and bottom ends. A slider is fixedly connected to the top of each of the two connecting seats at the top of the scissor link assembly. A helical spring is fixedly connected to the bottom of each of the two connecting seats at the bottom of the scissor link assembly. A permanent magnet is fixedly connected to the bottom of each of the two helical springs. A cylinder is slidably sleeved on the sides of each of the two helical springs, and a permanent magnet is sleeved inside the two cylinders. A second permanent magnet is fixedly sleeved on the inner side of the bottom end of each cylinder. A slider is fixedly connected to the bottom of each of the two cylinders. A slide rail is slidably sleeved on the sides of each of the four sliders.

[0011] Furthermore, the variable stiffness assembly includes a transformer control module. An acceleration sensor is fixedly connected to the top of the front of the transformer control module, and the bottom of the transformer control module is fixedly connected to the top of the mounting base. A cylinder is fixedly connected to the middle of the top of the transformer control module. Two air pipes are fixedly connected to both sides of the cylinder. One end of each of the four air pipes is fixedly connected to two air compression components. The two air compression components are respectively fixedly connected to both sides of the transformer control module.

[0012] Furthermore, a piston is slidably sleeved on the inner side of the cylinder, a movable rod is fixedly connected to one side of the piston, a disc is rotatably connected to one end of the movable rod, an intermediate shaft is fixedly sleeved in the middle of the disc, fixed plates are fixedly sleeved on the sides of both ends of the intermediate shaft, a fixed block is fixedly connected to the bottom end of the fixed plate, and the back of the fixed block is fixedly connected to the back of the transformer control module, a stepper motor is fixedly connected to one end of the intermediate shaft, and the intermediate shaft is fixedly connected to the drive end of the stepper motor, and the stepper motor is fixedly connected to the side of the fixed plate.

[0013] Furthermore, the sealed capsule is filled with several ceramic particles, the internal structure of the sealed capsule is honeycomb-like, and the sealed capsule is filled with air.

[0014] The technical effects and advantages of this invention are as follows: By utilizing the geometric nonlinearity of the scissor link assembly, the magnetic repulsion between permanent magnet one and permanent magnet two is converted into negative stiffness in the vertical and horizontal directions as the distance between them decreases. This negative stiffness cancels out the positive stiffness of the helical spring, making the total stiffness of the device approach zero, thereby achieving ultra-low frequency vibration isolation. At the same time, through symmetrical arrangement, the device has quasi-zero stiffness characteristics in both the horizontal and vertical directions, effectively isolating micro-amplitude vibrations from all directions. This solves the problem that traditional rubber or spring pads have a certain effect in the vertical direction, but weak isolation capability for horizontal vibrations, such as wind loads and start-stop impacts, and are prone to resonance amplification at specific frequencies.

[0015] The sealed bladder is filled with air and is flexible, providing low-stiffness cushioning. When the accelerometer detects the impact threshold, it triggers the motor to drive the piston to quickly extract the air from the bladder, creating a vacuum. The external air pressure causes the sealed bladder to contract, and the pressure difference between the ceramic particles creates a blocking effect, instantly locking it into a rigid body. This disperses the impact force to the external reinforcing frame, solving the problem that conventional buffer devices have fixed stiffness, require low stiffness to isolate micro-vibrations during normal operation, and generate huge impacts during faults such as short circuits, where low stiffness leads to excessive displacement and impact on the housing.

[0016] When the accelerometer detects the impact threshold, it triggers the motor to drive the piston, causing the sealing bladder to contract. The accelerometer further triggers the servo motor, which, through the meshing of gears and racks, drives the pressure plate to compensate for the reduced distance caused by the contraction of the sealing bladder. This allows the sealing bladder and ceramic particles to become rigid and contact the housing frame. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cabinet component structure of the present invention; Figure 3 This is a schematic diagram of the side structure of the cabinet assembly of the present invention; Figure 4 This is a schematic diagram of the shell assembly structure of the present invention; Figure 5 This is a schematic diagram of the stiffness buffer component structure of the present invention; Figure 6 This is a schematic diagram of the scissor buffer assembly structure of the present invention; Figure 7 This is a schematic diagram of the front structure of the variable stiffness component of the present invention; Figure 8 This is a schematic diagram of the back structure of the variable stiffness component of the present invention; Figure 9 This is a schematic diagram of the gas compression assembly structure of the present invention.

[0018] The attached diagram is labeled as follows: 1. Cabinet assembly; 101. Cabinet main body; 102. Sealed cabinet door; 103. Shell assembly; 1031. External shell; 1032. Pressure plate; 1033. Guide rail; 1034. Servo motor; 2. Stiffness buffer assembly; 201. Mounting base; 202. Scissor lift buffer assembly; 2021. Scissor lift linkage assembly; 2022. Helical spring; 2023. Cylinder; 2024. Slider; 2025. Slide rail; 3. Variable stiffness assembly; 301. Transformer control module; 302. Accelerometer sensor; 303. Cylinder barrel; 304. Air pipe; 305. Air compression assembly; 3051. Sealed bladder; 3052. Ceramic particles. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The anti-vibration buffer device for a box-type transformer control cabinet involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Reference Figure 1The present invention provides a vibration damping device for a box-type transformer control cabinet, including a cabinet assembly 1, a stiffness damping assembly 2 fixedly connected to the inner side of the bottom of the cabinet assembly 1, and a variable stiffness assembly 3 fixedly connected to the top of the stiffness damping assembly 2.

[0021] In this embodiment, it is necessary to further explain that the stiffness buffer component 2 solves the problem that traditional rubber or spring pads have a certain effect in the vertical direction, but have weak vibration isolation ability in the horizontal direction, such as wind load, start-stop impact, and are prone to resonance amplification at specific frequencies. The cabinet component 1 and the variable stiffness component 3 solve the problem that conventional buffer devices have fixed stiffness, require low stiffness to isolate micro-vibrations during normal operation, and generate huge impacts during faults such as short circuits. Low stiffness will lead to excessive displacement and impact on the cabinet. The specific structure and working principle of the above components will be explained in detail later.

[0022] Reference Figure 2 and Figure 3 The cabinet assembly 1 includes a cabinet body 101. A sealed cabinet door 102 is rotatably connected to one end of the front of the cabinet body 101. The front of the sealed cabinet door 102 is provided with a glass window. One end of the sealed cabinet door 102 is provided with a handle. Both sides of the cabinet body 101 are fixedly fitted with a shell assembly 103, and the shell assembly 103 is located on the outside of both sides of the cabinet body 101.

[0023] In this embodiment, it is necessary to further explain that the main cabinet body 101 serves as the basic load-bearing frame of the entire device, used to install the stiffness buffer assembly 2 and the variable stiffness assembly 3, and to withstand external vibration and impact loads; the sealed cabinet door 102 achieves opening and closing of the cabinet through a rotating connection, facilitating daily inspection and maintenance of the internal transformer control module 301; the glass window allows direct observation of the working status of internal components and instrument readings without opening the cabinet door; and the handle provides the operating force for opening and closing the door; the shell assembly 103 is fixedly sleeved on both sides of the main cabinet body 101. Used to house actuators such as servo motor 1034, rack and pinion, and pressure plate 1032, when the acceleration sensor 302 detects the impact threshold, servo motor 1034 drives rack to move along guide rail 1033, causing pressure plate 1032 to move inward towards the cabinet, thereby accurately compensating for the shrinkage gap generated after vacuuming of sealing bladder 3051, ensuring that sealing bladder 3051 can form a tight contact with the inner wall of cabinet body 101 after becoming a rigid body, effectively transmitting the impact force to the external reinforcing frame, and avoiding local deformation of cabinet or excessive displacement of internal modules.

[0024] Reference Figure 4The shell assembly 103 includes an outer shell 1031, which is fixedly sleeved on both sides of the cabinet body 101 and located outside the cabinet body 101. A guide rail 1033 is fixedly connected to the inner side of the bottom of the outer shell 1031. A rack is slidably sleeved on the top of the guide rail 1033. A pressure plate 1032 is fixedly connected to one end of the rack. A servo motor 1034 is fixedly connected to the inner side of the back of the outer shell 1031. A rotating shaft is fixedly connected to the drive end of the servo motor 1034. A gear is fixedly connected to one end of the rotating shaft, and the gear meshes with the rack.

[0025] In this embodiment, it is necessary to further explain that the outer casing 1031 provides installation protection space for the mounting assembly 103 and is fixed to both sides of the cabinet body 101; the guide rail 1033 guides the movement direction of the rack to ensure the straightness and stability of the pressure plate 1032's translation; the rack meshes with the gear driven by the servo motor 1034, and when the acceleration sensor 302 detects the impact threshold, the controller triggers the servo motor 1034 to rotate at a preset angle, converting the rotational motion into the linear movement of the rack through the gear and rack pair, thereby driving the pressure plate 1032 to move inward toward the cabinet. The pushing distance of the pressure plate 1032 is precisely matched with the shrinkage gap generated after the sealing bladder 3051 is evacuated, so that the sealing bladder 3051 can be pushed by the pressure plate 1032 to make close contact with the inner wall of the cabinet body 101 after it becomes a rigid body. This directly transmits the impact force to the external reinforcing frame, avoiding the ineffective transmission of impact energy or excessive deformation of the cabinet due to the existence of gaps. The sealing bladder 3051 is filled with ceramic particles 3052. When the sealing bladder 3051 shrinks, the lateral distance of the convergence of the internal ceramic particles 3052 is fixed, making the shrinkage gap fixed and easy to measure.

[0026] Reference Figure 5 The stiffness buffer component 2 includes a mounting base 201, and a plurality of scissor buffer components 202 are fixedly connected to the bottom of the mounting base 201. The bottom of the scissor buffer components 202 is fixedly connected to the inner side of the bottom of the cabinet body 101.

[0027] In this embodiment, it is necessary to further explain that the transformer control module 301 is fixedly connected above the mounting base 201, which is used to evenly transfer the load of the transformer control module 301 to the multiple scissor buffer components 202 below; the number and arrangement of the scissor buffer components 202 are set according to the cabinet size and load requirements, and their bottoms are fixed to the inner side of the bottom of the cabinet body 101, forming elastic support for the upper structure.

[0028] Reference Figure 6The scissor lift buffer assembly 202 includes a scissor lift linkage assembly 2021, which consists of two lead screws and an intermediate shaft. The two lead screws are placed crosswise, and the intermediate shaft rotatably connects the two lead screws. Connecting seats are hinged to the top and bottom of each of the two lead screws. Slider blocks 2024 are fixedly connected to the top of each of the two connecting seats at the top of the scissor lift linkage assembly 2021. Helical springs 2022 are fixedly connected to the bottom of each of the two connecting seats at the bottom of the scissor lift linkage assembly 2021. A first permanent magnet is fixedly connected to the bottom of each of the two helical springs 2022. A cylinder 2023 is slidably sleeved on the sides of each of the two helical springs 2022, and a first permanent magnet is sleeved inside each of the two cylinders 2023. A second permanent magnet is fixedly sleeved on the inner side of the bottom of each cylinder 2023. Slider blocks 2024 are fixedly connected to the bottom of each of the two cylinders 2023. Slide rails 2025 are slidably sleeved on the sides of each of the four sliders 2024.

[0029] In this embodiment, it is necessary to further explain that the scissor lift assembly 2021 forms a telescopic scissor structure through two cross-placed lead screws and an intermediate shaft. Its top end is connected to the mounting base 201 or the transformer control module 301 via a connecting seat and a slider 2024, and its bottom end is connected to the helical spring 2022 via a connecting seat. When the cabinet is subjected to vertical or horizontal vibration, the scissor lift assembly 2021 extends and deflects, causing the helical spring 2022 at the bottom end to compress or stretch. At the same time, the permanent magnet fixed to the bottom end of the helical spring 2022 moves with the spring inside the cylinder 2023, interacting with the permanent magnet fixed to the inner side of the bottom end of the cylinder 2023. The magnet generates a magnetic repulsive force that varies with distance. This repulsive force, after being transmitted nonlinearly through the scissor link assembly 2021, exhibits negative stiffness characteristics in both the vertical and horizontal directions. This negative stiffness, combined with the positive stiffness provided by the helical spring 2022, causes the total stiffness of the system to approach zero near the static equilibrium position, forming a quasi-zero stiffness vibration isolation system. The symmetrically arranged multiple scissor buffer assemblies 202 further ensure that the device has ultra-low frequency vibration isolation capability in both the horizontal and vertical directions, effectively isolating micro-vibrations from various directions such as the foundation, wind load, and start-stop impacts. This avoids the problems of weak horizontal vibration isolation capability and resonance amplification at specific frequencies associated with traditional rubber or spring pads. The sliding cooperation between the slider 2024 and the slide rail 2025 ensures the linear guidance accuracy of the extension and retraction of the scissor link assembly 2021 and the movement of the magnet, preventing motion jamming and improving the reliability and stability of the buffer.

[0030] By utilizing the geometric nonlinearity of the scissor link assembly 2021, the magnetic repulsion between permanent magnet one and permanent magnet two is converted into negative stiffness in the vertical and horizontal directions as the distance between them decreases. This negative stiffness cancels out the positive stiffness of the helical spring 2022, making the total stiffness of the device approach zero, thereby achieving ultra-low frequency vibration isolation. At the same time, through symmetrical arrangement, the device has quasi-zero stiffness characteristics in both the horizontal and vertical directions, effectively isolating micro-amplitude vibrations from all directions. This solves the problem that traditional rubber or spring pads have a certain effect in the vertical direction, but weak vibration isolation capability in the horizontal direction, such as wind loads and start-stop impacts, and are prone to resonance amplification at specific frequencies.

[0031] Reference Figure 7 and Figure 8 The variable stiffness assembly 3 includes a transformer control module 301. An acceleration sensor 302 is fixedly connected to the top of the front of the transformer control module 301. The bottom of the transformer control module 301 is fixedly connected to the top of the mounting base 201. A cylinder 303 is fixedly connected to the middle of the top of the transformer control module 301. Two air pipes 304 are fixedly connected to both sides of the cylinder 303. One end of each of the four air pipes 304 is fixedly connected to two air compression assemblies 305. The two air compression assemblies 305 are respectively fixedly connected to the transformer control module. On both sides of 301, a piston is slidably sleeved on the inner side of the cylinder 303. A movable rod is fixedly connected to one side of the piston. A disc is rotatably connected to one end of the movable rod. An intermediate shaft is fixedly sleeved in the middle of the disc. Fixed plates are fixedly sleeved on the sides of both ends of the intermediate shaft. A fixed block is fixedly connected to the bottom end of the fixed plate. The back of the fixed block is fixedly connected to the back of the transformer control module 301. A stepper motor is fixedly connected to one end of the intermediate shaft. The intermediate shaft is fixedly connected to the drive end of the stepper motor. The stepper motor is fixedly connected to the side of the fixed plate.

[0032] In this embodiment, it is necessary to further explain that the accelerometer 302 monitors the vibration acceleration of the transformer control module 301 in real time. Under normal operating conditions, the sealed capsule 3051 is filled with air, exhibiting a flexible state, providing low-stiffness buffer for the control cabinet and effectively isolating micro-vibrations. When the accelerometer 302 detects an impact signal exceeding a preset threshold, such as a short circuit fault, earthquake, or severe impact caused by transportation bumps, the controller immediately triggers the stepper motor to rotate at a set angle. The drive end of the stepper motor drives the intermediate shaft to rotate, and the intermediate shaft converts the rotational motion into the reciprocating linear motion of the piston in the cylinder 303 through a disc and a movable rod.

[0033] Reference Figure 9The air compression assembly 305 includes a sealing bladder 3051, the interior of which is filled with a plurality of ceramic particles 3052. The internal structure of the sealing bladder 3051 is honeycomb-shaped. The sealing bladder 3051 is filled with air. When the sealing bladder 3051 is in a vacuum state, the distance between its outer side and the inner wall of the cabinet body 101 is equal to the distance the rack moves.

[0034] In this embodiment, it is necessary to specifically explain that the ceramic particles 3052 are zirconia beads, but not limited to zirconia beads. When the sealing bladder 3051 is in a vacuum contraction state, a gap will naturally be generated between its outer surface and the inner wall of the cabinet body 101. In order to ensure that the rigidified sealing bladder 3051 can form a tight contact with the inner wall of the cabinet body 101 and avoid the impact energy from not being effectively transmitted due to the gap, the accelerometer 302 will trigger the servo motor 1034 in the shell-attaching assembly 103 at the same time as triggering the air extraction. The servo motor 1034 drives the pressure plate 1032 to move into the cabinet through the gear rack, and the distance of the rack movement is precisely set to be equal to the gap distance generated after the sealing bladder 3051 is vacuum contracted. In this way, the pressure plate 1032 pushes the sealing bladder 3051 so that its outer side is tightly attached to the inner wall of the cabinet body 101, achieving rigid contact, thereby directly bypassing the impact force to the external reinforcing frame and protecting the internal transformer control module 301 from excessive displacement and impact damage. The honeycomb structure also helps maintain the shape stability of the sealed bladder 3051 during repeated inflation and deflation, extending its service life; The piston rapidly draws air from the sealed bladder 3051 and discharges it through the air pipe 304, creating a vacuum inside the sealed bladder 3051. External atmospheric pressure causes the sealed bladder 3051 to contract rapidly. Simultaneously, the ceramic particles 3052 inside the bladder experience a blocking effect due to the pressure difference, causing them to press and lock together, instantly transforming the sealed bladder 3051 from a flexible to a rigid body. This rigid body directly disperses the impact force to the main body 101 and the external reinforcing frame, preventing the impact energy from concentrating on the transformer control module 301 and preventing excessive displacement due to low-rigidity buffering that could cause impact to the housing. Furthermore, the fixing plate and fixing block provide stable support for the intermediate shaft and stepper motor, ensuring the smoothness of the piston movement and the reliability of the air extraction action. The sealed bladder 3051 is filled with air and is flexible, providing low-stiffness buffering. When the acceleration sensor 302 detects the impact threshold, it triggers the motor to drive the piston to quickly extract the air from the bladder, forming a vacuum. The external air pressure causes the sealed bladder 3051 to contract. The ceramic particles 3052 block each other due to the air pressure difference, instantly locking into a rigid body. This disperses the impact force to the external reinforcing frame, solving the problem that conventional buffer devices have fixed stiffness, require low stiffness to isolate micro-vibrations during normal operation, and generate huge impacts during faults such as short circuits, where low stiffness can lead to excessive displacement and impact on the housing. When the acceleration sensor 302 detects the impact threshold, it triggers the motor to drive the piston, causing the sealing bladder 3051 to contract. The acceleration sensor 302 further triggers the servo motor 1034, which, under the meshing of gears and racks, drives the pressure plate 1032 to compensate for the reduced distance caused by the contraction of the sealing bladder 3051, so that the sealing bladder 3051 and the ceramic particles 3052 become rigid and can contact the box frame.

[0035] Under normal operating conditions, the sealing bladder 3051 is filled with air and is flexible. Its outer surface has slight contact or no gap with the inner wall of the cabinet body 101. When the sealing bladder 3051 is evacuated to a vacuum state, it contracts due to external atmospheric pressure, naturally creating a gap between its outer surface and the inner wall of the cabinet body. In this embodiment, the gap ranges from 2mm to 10mm. The acceleration sensor 302 monitors the vibration acceleration in real time. When an impact threshold is detected, the control system simultaneously triggers the stepper motor and the servo motor, causing the stepper motor to drive the piston to evacuate air, causing the sealing bladder 3051 to... (The sentence is incomplete and requires further context to translate accurately). Once a vacuum state is reached, the servo motor 1034 starts, driving the rack and pinion mechanism to push the pressure plate 1032 into the cabinet. The rack and pinion movement distance is precisely set to be equal to the gap generated by the contraction of the sealing bladder. The pressure plate 1032 moves to press tightly against the sealing bladder 3051. At this time, the sealing bladder 3051 is in a vacuum contraction state. The internal ceramic particles 3052 form a blocking effect due to the air pressure difference, and the whole body presents a rigid body. The rigid sealing bladder 3051 forms a direct mechanical contact path with the cabinet body 101 through the shell assembly 103. The impact force is transmitted to the cabinet body 101 through this path, avoiding excessive displacement or impact on the internal transformer control module 301. In this embodiment, the impact threshold is 5g, which can be determined according to the actual working conditions. The gap generated by the contraction of the bladder can be measured by the servo motor 1034 using position closed-loop control or by the system pre-stored gap and evacuation time and bladder material calibration curve, or by the displacement sensor providing real-time feedback of the outer position of the sealing bladder. The above methods for measuring the gap generated by the contraction of the bladder are all existing technologies and will not be described in detail.

[0036] The working principle of this invention is as follows: Utilizing the geometric nonlinearity of the scissor link assembly 2021, the magnetic repulsion force between permanent magnet one and permanent magnet two is converted into negative stiffness in the vertical and horizontal directions as the distance between them decreases. This negative stiffness cancels out the positive stiffness of the helical spring 2022, making the total stiffness of the device approach zero, thereby achieving ultra-low frequency vibration isolation. At the same time, through symmetrical arrangement, the device has quasi-zero stiffness characteristics in both the horizontal and vertical directions, effectively isolating micro-amplitude vibrations from all directions. This solves the problem that traditional rubber or spring pads have a certain effect in the vertical direction, but weak vibration isolation capability in the horizontal direction, such as wind loads and start-stop impacts, and are prone to resonance amplification at specific frequencies. The sealed bladder 3051 is filled with air and is flexible, providing low-stiffness buffering. When the acceleration sensor 302 detects the impact threshold, it triggers the motor to drive the piston to quickly extract the air from the bladder, creating a vacuum. The external air pressure causes the sealed bladder 3051 to contract, and the ceramic particles 3052 create a blocking effect due to the air pressure difference, instantly locking into a rigid body. This disperses the impact force to the external reinforcing frame, solving the problem that conventional buffer devices have fixed stiffness, require low stiffness to isolate micro-vibrations during normal operation, and generate huge impacts during faults such as short circuits, where low stiffness can lead to excessive displacement and impact on the housing.

[0037] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 vibration damping device for a box-type transformer control cabinet, comprising a cabinet assembly (1), characterized in that, The cabinet assembly (1) includes a cabinet body (101), a scissor linkage assembly (2021) is installed on the inner bottom of the cabinet body (101), a permanent magnet I and a permanent magnet II are installed on the bottom of the scissor linkage assembly (2021), a helical spring (2022) is installed on the top of the permanent magnet I, a transformer control module (301) is installed on the inner side of the cabinet body (101), an acceleration sensor (302) is installed on the front of the transformer control module (301), a cylinder (303) is installed on the top of the transformer control module (301), air compression assemblies (305) are installed on both sides of the transformer control module (301), a servo motor (1034) is installed on both sides of the cabinet body (101), and a rack is installed on the front of the servo motor (1034). The scissor link assembly (2021) cooperates with permanent magnet one and permanent magnet two to counteract the positive stiffness of the helical spring (2022). The acceleration sensor (302) triggers the cylinder (303) to draw air from the air compression assembly (305), causing the sealing bladder (3051) to contract into a rigid body and disperse the impact force to the external reinforcing frame. The air compression assembly (305) includes a sealing bladder (3051). When the sealing bladder (3051) is in a vacuum state, the distance between the outer side of the sealing bladder (3051) and the inner wall of the cabinet body (101) is equal to the distance the rack moves. The rack is driven by a servo motor (1034) to compensate for the distance when the sealing bladder (3051) is evacuated and contracted, so that the sealing bladder (3051) is in rigid contact with the cabinet body (101).

2. The anti-vibration buffer device for a box-type transformer control cabinet according to claim 1, characterized in that: A stiffness buffer assembly (2) is fixedly connected to the inner side of the bottom of the cabinet assembly (1), and a variable stiffness assembly (3) is fixedly connected to the top of the stiffness buffer assembly (2).

3. The anti-vibration buffer device for a box-type transformer control cabinet according to claim 2, characterized in that: The cabinet assembly (1) includes a cabinet body (101), a sealed cabinet door (102) is rotatably connected to one end of the front of the cabinet body (101), the front of the sealed cabinet door (102) is provided with a glass window, one end of the sealed cabinet door (102) is provided with a handle, and a shell assembly (103) is fixedly sleeved on both sides of the cabinet body (101), and the shell assembly (103) is located on the outside of both sides of the cabinet body (101).

4. The anti-vibration buffer device for a box-type transformer control cabinet according to claim 3, characterized in that: The shell assembly (103) includes an outer shell (1031), which is fixedly sleeved on both sides of the cabinet body (101) and located outside the cabinet body (101). A guide rail (1033) is fixedly connected to the inner side of the bottom of the outer shell (1031). A rack is slidably sleeved on the top of the guide rail (1033). A pressure plate (1032) is fixedly connected to one end of the rack. A servo motor (1034) is fixedly connected to the inner side of the back of the outer shell (1031). A rotating shaft is fixedly connected to the drive end of the servo motor (1034). A gear is fixedly connected to one end of the rotating shaft, and the gear meshes with the rack.

5. The anti-vibration buffer device for a box-type transformer control cabinet according to claim 4, characterized in that: The stiffness buffer assembly (2) includes a mounting base (201), and a plurality of scissor buffer assemblies (202) are fixedly connected to the bottom of the mounting base (201). The bottom of the scissor buffer assembly (202) is fixedly connected to the inner side of the bottom of the cabinet body (101).

6. The anti-vibration buffer device for a box-type transformer control cabinet according to claim 5, characterized in that: The scissor lift buffer assembly (202) includes a scissor lift linkage assembly (2021), which consists of two lead screws and an intermediate shaft. The two lead screws are placed crosswise, and the intermediate shaft rotatably connects the two lead screws.

7. The anti-vibration buffer device for a box-type transformer control cabinet according to claim 6, characterized in that: Both of the two lead screws are hinged to the top and bottom of the screws. The top of the two connecting seats at the top of the scissor link assembly (2021) is fixedly connected to the top of the two connecting seats. The bottom of the two connecting seats at the bottom of the scissor link assembly (2021) is fixedly connected to the bottom of the two connecting seats. The bottom of the two helical springs (2022) is fixedly connected to the first permanent magnet. The sides of the two helical springs (2022) are slidably sleeved with cylinders (2023). The inside of the two cylinders (2023) is sleeved with the first permanent magnet. The inside of the bottom of the cylinders (2023) is fixedly sleeved with the second permanent magnet. The bottom of the two cylinders (2023) is fixedly connected to the bottom of the two cylinders (2023). The sides of the four sliders (2024) are slidably sleeved with slide rails (2025).

8. The anti-vibration buffer device for a box-type transformer control cabinet according to claim 7, characterized in that: The variable stiffness assembly (3) includes a transformer control module (301). An acceleration sensor (302) is fixedly connected to the top of the front of the transformer control module (301). The bottom of the transformer control module (301) is fixedly connected to the top of the mounting base (201). A cylinder (303) is fixedly connected to the middle of the top of the transformer control module (301). Two air pipes (304) are fixedly connected to both sides of the cylinder (303). One end of each of the four air pipes (304) is fixedly connected to two air compression assemblies (305). The two air compression assemblies (305) are fixedly connected to both sides of the transformer control module (301).

9. The anti-vibration buffer device for a box-type transformer control cabinet according to claim 8, characterized in that: A piston is slidably sleeved on the inner side of the cylinder (303). A movable rod is fixedly connected to one side of the piston. A disc is rotatably connected to one end of the movable rod. An intermediate shaft is fixedly sleeved in the middle of the disc. Fixed plates are fixedly sleeved on the sides of both ends of the intermediate shaft. A fixed block is fixedly connected to the bottom end of the fixed plate. The back of the fixed block is fixedly connected to the back of the transformer control module (301). A stepper motor is fixedly connected to one end of the intermediate shaft. The intermediate shaft is fixedly connected to the drive end of the stepper motor. The stepper motor is fixedly connected to the side of the fixed plate.

10. A vibration damping device for a box-type transformer control cabinet according to claim 9, characterized in that: The sealed capsule (3051) is filled with a number of ceramic particles (3052), the internal structure of the sealed capsule (3051) is honeycomb-shaped, and the sealed capsule (3051) is filled with air.

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