All-insulation high-voltage gas-insulated switchgear

Abstract

The invention provides an all-insulation high-voltage gas-insulated switchgear, and belongs to the technical field of high-voltage power equipment. The inflatable cabinet comprises a cabinet body, an inflatable box, a main air chamber, a partitioned air bag array mechanism, a heat linkage heat exchange mechanism and a self-cleaning heat exchange assembly. The partition air bag array mechanism is matched with a pressure response distribution assembly through a flexible air bag and a thermosensitive elastic film, SF6 gas distribution is dynamically adjusted, and insulation enhancement of a high-temperature area is achieved; the heat linkage heat exchange mechanism optimizes heat balance by utilizing a honeycomb-shaped heat dissipation net and double-metal heat dissipation fins; the self-cleaning heat exchange assembly removes by-products through a vibrating screen and a hydrophobic coating, and the maintenance frequency is reduced. The problems of high partial discharge risk, non-uniform heat distribution, large SF6 gas discharge amount and frequent maintenance of a traditional gas-insulated switchgear are solved, self-adaptive partition insulation, efficient heat dissipation, gas cyclic utilization and low-maintenance operation are realized, the gas-insulated switchgear is suitable for large-scale application, and the insulation performance, the operation reliability and the environmental protection property are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage electric power equipment, in particular to a fully-insulated high-voltage gas-filled cabinet. Background Art

[0002] The fully insulated high-voltage gas-filled cabinet is a high-voltage switchgear widely used in power distribution systems. It is mainly used for power distribution, protection and control of medium and high voltage power grids (such as 10kV-35kV). The device adopts a fully enclosed structure and is filled with SF6 gas or other insulating gases as an insulating medium. It forms insulation protection around key electrical components (such as circuit breakers, busbars, switches) to prevent arcing, partial discharge and interference from the external environment (such as moisture and dust). The gas-filled cabinet has the advantages of compact structure, reliable operation, high safety and low maintenance requirements. It is widely used in urban distribution stations, industrial parks, wind farms and extreme environments (such as coastal and high-altitude areas). Its core components include the gas-filled box (including the main gas chamber), electrical components, sealing system and heat dissipation mechanism. Gas circulation, pressure maintenance and heat management are achieved through mechanical or electrical control means to ensure long-term and stable operation of the equipment.

[0003] Existing fully insulated high-voltage gas cabinets still have several defects in practical applications. First, the pressure distribution of SF6 gas is relatively simple, making it difficult to dynamically adjust according to the temperature or electric field strength differences in the electrical component area. As a result, local discharge may occur in high-load areas due to insufficient gas pressure, and the gas pressure in low-load areas may be too high, increasing sealing stress. Secondly, the internal heat distribution is uneven, and high-heating components (such as circuit breakers) are prone to local overheating, which affects the life of the components. Traditional heat dissipation mechanisms (such as fixed heat exchange tubes or external heat sinks) have limited efficiency and are easily affected by external dust or moisture, increasing the maintenance burden. In addition, during long-term operation, SF6 gas may produce byproducts (such as SOF2 and HF) due to arc decomposition, which block the heat exchange channel and reduce heat dissipation efficiency. Existing designs mostly rely on electronic control systems (such as sensors and solenoid valves) to achieve gas management and heat dissipation, which increases complexity and failure risks. Especially in high-temperature, vibration or remote unmanned scenarios, there is a lack of reliable solutions with purely mechanical structures, which limits the environmental adaptability and long-term stability of the equipment. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the present invention realizes adaptive partition insulation and heat balance of SF6 gas in a fully insulated high-voltage gas filling cabinet through a purely mechanical structure, solving the problems of single pressure distribution, uneven heat and complex maintenance.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a fully insulated high-pressure inflatable cabinet, comprising a cabinet body, a partitioned airbag array mechanism, and a thermal linkage heat exchange mechanism, wherein:

[0008] An air filling box is fixedly installed at the center of the cabinet, and a main air chamber is opened inside the air filling box;

[0009] The partitioned airbag array mechanism includes a plurality of flexible airbags arrayed on the lower side of the main air chamber, the plurality of flexible airbags being fixed to the inner wall of the inflatable box via flexible brackets, the bottom ends of the plurality of flexible airbags extending to the inner bottom wall of the inflatable box and connected to a first one-way valve assembly via a micro elastic tube, the bottom ends of the plurality of first one-way valve assemblies being connected to a manifold, the rear end of the manifold being connected to a guide tube, and the output end of the guide tube extending to the inner top wall of the inflatable box and passing through to the upper side of the main air chamber, and a pressure-responsive distribution assembly being provided on one side of the plurality of flexible brackets;

[0010] The thermal linkage heat exchange mechanism includes a fixing frame fixedly installed on the left and right sides of the main air chamber, a honeycomb heat dissipation network is provided inside the fixing frame and on one side close to the inner wall of the inflation box, movable components are symmetrically provided on the front and back sides of the fixing frame, and a plurality of bimetallic heat sinks are provided between the two groups of movable components, and self-cleaning heat exchange components are provided on the opposite sides of the two groups of fixing frames.

[0011] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, wherein: the first one-way valve assembly includes a connecting channel opened directly below the micro elastic tube, and the connecting channel has a through structure that is narrow at the top and wide at the bottom, and the top end of the connecting channel is connected to the output end of the micro elastic tube, and the bottom end thereof is connected to the manifold, the inner top wall of the connecting channel is fixedly connected to a first telescopic spring, the bottom end of the first telescopic spring is fixedly connected to a sealing plate, and the sealing plate is movably clamped at the intersection of the narrow channel and the wide channel of the connecting channel.

[0012] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, the pressure response distribution assembly includes a fixed cylinder fixedly installed on the inner top wall of the inflatable box, a telescopic cavity is opened on the lower side of the interior of the fixed cylinder, and openings are symmetrically opened on the left and right sides of the telescopic cavity. The inner top wall of the telescopic cavity is fixedly connected with an expansion spring, the bottom end of the expansion spring is fixedly connected with a hollow float, the bottom end of the hollow float is fixedly connected with a U-shaped connecting rod, and the other end of the U-shaped connecting rod passes through the manifold and extends into the connecting channel and is fixedly connected to the bottom end of the sealing plate.

[0013] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, wherein: a main valve assembly is provided at the top of multiple groups of the pressure response distribution assemblies, the main valve assembly includes a cavity opened in the top wall of the inflatable box, and the tops of multiple fixed cylinders are connected to the cavity, the middle of the cavity is slidably connected with a pressure plate, the middle of the top of the pressure plate is provided with a bolt, and the top of the bolt passes through the top wall of the inflatable box and the cabinet body in turn and extends to the outside thereof and is fixedly connected with a knob, the bottom end of the pressure plate is arrayed with push rods, and the bottom ends of multiple push rods respectively extend into the interiors of multiple fixed cylinders and are respectively connected to multiple hollow floats.

[0014] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, the two groups of movable components respectively include fixed frames fixedly connected to the front wall and rear wall inside the fixed frame, and the interiors of the two fixed frames are slidably connected with slides that can slide up and down, and multiple hinge shafts are arranged on the opposite surfaces of the two slides at equal distances from top to bottom, and multiple bimetallic heat sinks are respectively hinged between each two hinge shafts.

[0015] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, the outer surfaces of the multiple flexible airbags are covered with a layer of thermosensitive elastic film, the outer surface of the flexible airbag close to the fixed frame side is hinged with a connecting rod, and the other end of the connecting rod is hinged to the bottom end of the slide.

[0016] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, the self-cleaning heat exchange component includes a connecting frame embedded in the left and right outer walls of the inflatable box, a circulation cavity is opened on the outside of the connecting frame, the input end of the circulation cavity is connected to multiple heat exchange channels, and the inlet ends of multiple heat exchange channels are connected to the honeycomb holes of the heat dissipation net, the connection between the circulation cavity and the multiple heat exchange channels is provided with a vibrating screen, and the bottom end of the circulation cavity is provided with a collection tank.

[0017] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, a collection box is slidably connected to the interior of the collection tank, and a handle is fixedly installed on the outer wall of the collection box.

[0018] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, an exhaust port is provided on the upper side of the cabinet body, the output end of the exhaust port is connected to the outside world, the input end is connected to the circulation chamber, and a second one-way valve assembly is provided inside the exhaust port.

[0019] As a preferred solution of the fully insulated high-pressure inflatable cabinet described in the present invention, the second one-way valve assembly includes a sealing plate sealed at the intersection of the wide and narrow channels inside the exhaust port, and a second telescopic spring is fixedly connected to the inner side of the sealing plate, and the other end of the second telescopic spring is fixedly connected to the inner wall of the connecting frame.

[0020] Beneficial effects of the present invention:

[0021] 1. This invention uses a flexible airbag and a thermosensitive elastic membrane to sense pressure and temperature changes in the main gas chamber. This, combined with the hollow float and U-shaped connecting rod of the pressure-responsive distribution assembly, dynamically adjusts the flow of SF6 gas. In high-temperature areas, the airbag expands to draw in gas, enhancing insulation strength in high-load areas like circuit breakers and busbars and significantly reducing the risk of partial discharge. In low-temperature areas, the airbag contracts to release gas, optimizing airflow distribution, reducing sealing stress, and ensuring stable insulation performance across the system.

[0022] 2. The thermal linkage heat exchange mechanism in this invention utilizes a honeycomb heat dissipation network and bimetallic fins to guide SF6 airflow to high-load areas, enhancing convective heat transfer and significantly reducing the main air / temperature temperature difference. The movable assembly and connecting rod convert the airbag expansion force into fin swing, dynamically adjusting the airflow direction and optimizing heat dissipation in high-temperature areas. The self-cleaning heat exchanger's heat exchange channels efficiently transfer heat to the outer wall, preventing overheating of electrical components and extending the equipment's service life.

[0023] 3. This invention directs SF6 gas from the airbag directly into the upper side of the main air chamber via a manifold and guide tube, creating a closed loop and minimizing gas loss. The main valve assembly, combined with a knob and push rod, manually activates the hollow float during maintenance, opening a check valve and temporarily storing the SF6 gas from the main chamber within the airbag. This eliminates the need for external equipment and reduces emission risks. A second check valve ensures that only a trace amount of hot air is emitted from the exhaust port, leveraging the high density of SF6 gas to prioritize gas circulation and meet environmental standards.

[0024] 4. The self-cleaning heat exchange assembly automatically removes SF6 decomposition byproducts through a vibrating screen and hydrophobic coating on the heat exchange channel, preventing channel blockage and maintaining efficient heat exchange. The collection trough and removable collection box facilitate regular cleaning of byproducts. Combined with the cabinet access, this simplifies maintenance operations, significantly reduces maintenance frequency, and ensures long-term operational reliability.

[0025] 5. This device utilizes a purely mechanical design, using SF6 corrosion-resistant materials, eliminating the need for electronic components. It is resistant to high temperatures, high humidity, and strong electromagnetic interference, making it suitable for extreme environments such as deserts and high altitudes. The expansion spring optimizes float sensitivity at high temperatures, enhancing the system's rapid response to pressure and temperature, ensuring operational stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0027] Figure 1 A perspective view of the overall structure of the present invention;

[0028] Figure 2 It is a three-dimensional front cross-sectional view of the present invention;

[0029] Figure 3 For the present invention Figure 2 A schematic diagram of the structure at center A;

[0030] Figure 4 It is a three-dimensional front cross-sectional view of the connection between the connection frame and the exhaust port of the present invention;

[0031] Figure 5 It is a three-dimensional front cross-sectional view of the connection between the manifold and the inflation box of the present invention;

[0032] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0033] Figure 7 It is a three-dimensional front cross-sectional view of the connection between the main valve assembly and the inflation box of the present invention;

[0034] Figure 8 It is a three-dimensional enlarged view of the connection between the fixing frame, the movable assembly and the bimetallic heat sink of the present invention;

[0035] Figure 9 is a three-dimensional side sectional view of the present invention;

[0036] Figure 10 It is a three-dimensional cross-sectional view of the connection between the flexible airbag and the movable component of the present invention. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0040] Example

[0041] Reference Figures 1 to 9 This embodiment provides a fully insulated high-voltage gas-filled cabinet suitable for 12kV high-voltage power systems. It realizes the adaptive partition insulation, heat balance, gas circulation and self-cleaning functions of SF6 gas through a purely mechanical structure, and is particularly suitable for high loads and extreme environments (such as deserts and high altitudes).

[0042] Specifically, the gas filling cabinet includes a cabinet body 100, and a gas filling box 101 is fixedly installed at the center of the interior of the cabinet body 100, and a main gas chamber 102 is opened inside the gas filling box 101. The cabinet body 100 is made of stainless steel, and is easy to maintain through the front inspection door and the top terminal. It provides high-strength and corrosion-resistant external protection to ensure long-term operational stability. The gas filling box 101 adopts a stainless steel shell and is fixed by an internal frame. The main gas chamber 102 inside is filled with SF6 gas (pressure 1.0-1.5 bar, molecular weight 146g / mol), providing a high dielectric strength insulation environment for electrical components such as circuit breakers, busbars and switches. The main gas chamber 102 uses a silicone sealing gasket to ensure that there is no leakage of SF6 gas, supports dynamic gas distribution, optimizes local insulation performance, reduces the risk of local discharge, and maintains pressure balance to extend the life of the equipment.

[0043] The partitioned airbag array mechanism 200 includes a plurality of flexible airbags 201 arrayed on the lower side of the main air chamber 102. The plurality of flexible airbags 201 are fixed to the inner wall of the inflatable box 101 through flexible brackets 202. The bottom ends of the plurality of flexible airbags 201 extend to the inner bottom wall of the inflatable box 101 and are connected to a first one-way valve assembly 204 through a micro elastic tube 203. The bottom ends of the plurality of first one-way valve assemblies 204 are connected to a manifold 205. The rear end of the manifold 205 is connected to a guide tube 206. The output end of the guide tube 206 extends to the inner top wall of the inflatable box 101 and passes through the upper side of the main air chamber 102. A pressure response distribution assembly 207 is provided on one side of the plurality of flexible brackets 202. The flexible airbag 201 is made of silicone rubber reinforced with aramid fiber, resistant to SF6 corrosion. It adjusts its volume through thermal response. At high temperatures (>40°C), it expands to absorb SF6 gas, increasing local pressure to 1.5 bar, enhancing insulation strength in high-load areas (such as circuit breakers or busbars). At low temperatures (<20°C), it contracts and releases gas, optimizing airflow distribution and reducing sealing stress in low-load areas. The flexible bracket 202 is made of silicone and bolted to the inner wall of the inflatable box, appropriately distanced from electrical components to ensure airbag stability and avoid disrupting the electric field distribution. The micro-elastic tube 203 is made of silicone, resistant to SF6 corrosion, and remains flexible to accommodate changes in the airbag's volume. It connects the airbag to the manifold, supporting unidirectional gas flow. The manifold 205 is made of stainless steel and aggregates gas flows from each airbag duct and delivers them to the guide tube 206, ensuring smooth system airflow. The guide tube 206, made of stainless steel and routed along the inner wall, directs SF6 gas from the manifold directly to the upper side of the main air chamber 102, promoting gas circulation and maintaining pressure balance within the main chamber. The pressure response distribution component 207 controls the opening of the first one-way valve component 204 by sensing the pressure change of the main gas chamber, adjusts the gas flow between the air bag and the manifold, supports temporary storage of gas during maintenance, and reduces SF6 emissions.

[0044] The first one-way valve assembly 204 includes a connecting channel 204a, located directly below the micro-elastic tube 203. This connecting channel 204a has a narrow top and wide bottom structure. Its top end is connected to the output end of the micro-elastic tube 203, and its bottom end is connected to the manifold 205. A first telescopic spring 204b is fixedly attached to the inner top wall of the connecting channel 204a. A sealing plate 204c is fixedly attached to the bottom end of the first telescopic spring 204b, and the sealing plate 204c is movably engaged at the junction of the narrow and wide channels of the connecting channel 204a. The connecting channel 204a is made of stainless steel and is airtightly connected to the pipe and manifold via a silicone gasket. Its narrow top and wide bottom structure optimizes airflow control, reduces pressure loss, and improves unidirectional flow efficiency. The first telescopic spring 204b is made of stainless steel and provides a constant tension (0.1-0.2 bar), ensuring that the sealing plate 204c normally seals the junction, preventing gas backflow. Sealing disc 204c is made of stainless steel and precisely snaps into place. When pipeline pressure exceeds 0.1 bar, it opens under pressure, allowing SF6 gas to flow from micro-elastic tube 203 into manifold 205 in one direction. Under reverse pressure, a spring returns, driving the sealing disc to close the channel and maintain pressure balance between the airbag and the main chamber. The first one-way valve assembly 204, with its low-pressure differential and high-sensitivity design, ensures precise control of airbag intake and exhaust, enhances local insulation, and reduces the risk of overvoltage or undervoltage.

[0045] The pressure-responsive distribution assembly 207 comprises a fixed cylinder 207a, fixedly mounted on the top wall of the plenum chamber 101. A telescopic chamber 207b is defined within the lower portion of the fixed cylinder 207a, with openings 207c symmetrically located on either side. An expansion spring 207d is fixedly attached to the top wall of the telescopic chamber 207b. A hollow float 207e is fixedly attached to the bottom end of the expansion spring 207d, which in turn is fixedly attached to the bottom end of the hollow float 207e. A U-shaped connecting rod 207f is fixedly attached to the bottom end of the hollow float 207e. The other end of the U-shaped connecting rod 207f passes through the manifold 205 and extends into the connecting channel 204a, where it is fixedly connected to the bottom end of the sealing plate 204c. The fixed cylinder 207a is made of stainless steel and bolted to the top of the plenum chamber. It houses the float and spring, protecting the internal components from corrosion caused by SF6 gas. The telescopic chamber 207b is connected to the main gas chamber through opening 207c, allowing SF6 gas to flow into the actuating float, ensuring real-time pressure sensing. The expansion spring 207d is made of nickel-titanium alloy (shape memory alloy), which stretches at high temperature (>40℃), reduces the friction of the float guide, improves the sensitivity to small pressure changes (0.05 bar), and optimizes the gas distribution in the high temperature area. The hollow float 207e is made of aluminum alloy, which is buoyant (SF6 density 6-9kg / m 3) senses pressure changes in the main gas chamber (1.0-1.5 bar), floating up and down, driving U-shaped connecting rod 207f. Made of stainless steel, U-shaped connecting rod 207f extends through the manifold's sealing interface (silicone sealing ring) to connecting channel 204a. Pulling sealing plate 204c, it controls the opening of first one-way valve assembly 204, regulating the flow of SF6 gas from micro-elastic tube 203 into manifold 205. The pressure-responsive distribution assembly 207 dynamically controls the opening of the one-way valve through buoyancy and springs, prioritizing gas delivery to the high-temperature airbag, enhancing insulation performance, and supporting manual maintenance operations.

[0046] A main valve assembly 208 is mounted at the top of the multiple pressure-responsive distribution assemblies 207. This assembly comprises a cavity 208a defined within the top wall of the plenum chamber 101. The tops of multiple fixed cylinders 207a are connected to this cavity 208a. A pressure plate 208b is slidably connected to the center of this cavity 208a. A bolt 208c is located in the center of this pressure plate 208b. The bolts 208c extend through the top walls of the plenum chamber 101 and the cabinet 100, extending to the exterior where they are fixedly connected to a knob 208d. Push rods 208e are mounted in an array at the bottom of the pressure plate 208b. The bottoms of these push rods 208e extend into the interiors of the fixed cylinders 207a and connect to multiple hollow floats 207e. Cavity 208a is constructed of stainless steel and connected to the fixed cylinders via a silicone gasket to ensure SF6 gas tightness. The pressure plate 208b is made of stainless steel and slides in the cavity, evenly distributing the push of the knob. The bolt 208c is made of stainless steel and is driven by the knob 208d (made of aluminum alloy). The knob is located at the top inspection port of the cabinet for easy manual operation. The push rod 208e is connected to the hollow float 207e through a sliding seal (silicone sealing ring) to synchronously transmit downward force. The main valve assembly 208 drives the bolt and the pressure plate downward by rotating the knob 208d. The push rod 208e simultaneously pushes the multiple hollow floats 207e downward, pulling the U-shaped connecting rod 207f, opening all the first one-way valve assemblies 204, and guiding the SF6 gas in the main air chamber into the air bag for temporary storage, achieving leak-free maintenance and reducing SF6 emissions and maintenance costs.

[0047] The thermally linked heat exchange mechanism 300 includes fixed brackets 301 mounted on the left and right sides of the main air chamber 102. A honeycomb heat sink 302 is installed inside the brackets 301, close to the inner wall of the plenum 101. Movable components 303 are symmetrically arranged on the front and rear sides of the brackets 301. Multiple bimetallic heat sinks 304 are located between the two sets of movable components 303. Self-cleaning heat exchange components 305 are installed on opposite sides of both brackets 301. The brackets 301 are made of stainless steel and welded to the inner wall of the plenum. They cover the left and right sides of the main air chamber, support the heat sink and movable components, and ensure structural stability. The honeycomb heat sink 302 is made of a copper-aluminum alloy (thermal conductivity >200W / m·K). Its honeycomb pore structure provides a large heat exchange surface, guiding the flow of SF6 gas and transferring heat from high-load areas such as circuit breakers or busbars to the self-cleaning heat exchange components, thereby reducing the main air temperature difference (<10°C). The movable component 303 uses the sliding motion of the slide to drive the heat sink, dynamically adjusting the airflow direction and enhancing convective heat transfer in high-temperature areas. The bimetallic heat sink 304, made of a copper-steel composite material, bends at high temperatures (>50°C) to guide the SF6 airflow to high-load areas, evenly distributing heat, preventing overheating of electrical components and extending equipment life. The thermally linked heat exchange mechanism 300 optimizes heat distribution in the main air chamber through the synergistic effect of the heat dissipation network and heat sink, ensuring long-term operational stability.

[0048] The two sets of movable components 303 respectively include fixed frames 303a fixedly connected to the front and rear walls of the fixed frame 301. Slideways 303b are slidably connected to the interior of each fixed frame 303a. Multiple hinges 303c are equidistantly arranged on the opposing surfaces of the two slideways 303b from top to bottom. Multiple bimetallic heat sinks 304 are hinged between each pair of hinges 303c. The fixed frames 303a are fixed to the inner wall of the fixed frame, supporting the movement of the slideways and ensuring structural rigidity. The slideways 303b slide via a low-friction coating (polytetrafluoroethylene) in response to the movement of the airbags, transmitting mechanical force. The hinges 303c are evenly spaced, securing the heat sinks and allowing them to swing flexibly. The movable components 303 are linked to the airbag connecting rod via the slides, converting the mechanical force of the airbag expansion into heat sink swinging, dynamically adjusting the airflow direction, enhancing heat exchange efficiency in high-temperature areas, and collaborating with the airbags to achieve dual optimization of temperature and insulation.

[0049] The outer surfaces of the multiple flexible airbags 201 are each covered with a thermosensitive elastic membrane 201a. A connecting rod 201b is hinged to the outer surface of the flexible airbag 201 near the mounting bracket 301, with the other end of the connecting rod 201b hinged to the bottom end of the slide 303b. The thermosensitive elastic membrane 201a, made of a silicone-based elastomer (embedded with shape memory fibers), expands at high temperatures (>40°C), driving the airbag to draw in SF6 gas, enhancing local insulation. At low temperatures (<20°C), it contracts, releasing the gas, promoting airflow and optimizing the pressure distribution in the main air chamber. The connecting rod 201b, made of aluminum alloy, connects the airbag to the slide via a hinge, transmitting the expansion force of the thermosensitive membrane to the slide 303b, driving the heat sink 304 to oscillate and enhance airflow guidance in high-temperature areas. By coupling the airbags with the heat dissipation mechanism, the thermosensitive elastic membrane 201a and connecting rod 201b achieve coordinated control of temperature response and heat exchange, improving the system's adaptability to high-load environments.

[0050] The self-cleaning heat exchange assembly 305 includes a connection frame 305a embedded in the outer wall of the left and right sides of the plenum 101. A circulation chamber 305b is provided on the outside of the connection frame 305a. The input end of the circulation chamber 305b is connected to multiple heat exchange channels 305c, and the inlet ends of the multiple heat exchange channels 305c are connected to the honeycomb holes of the heat dissipation network. The connection between the circulation chamber 305b and the multiple heat exchange channels 305c is provided with a vibrating screen 305d, and the bottom end of the circulation chamber 305b is provided with a collection tank 305e. The connection frame 305a is made of stainless steel and embedded in the outer wall of the plenum, supporting the heat exchange channel and the circulation chamber to ensure the airtightness of the structure. The circulation chamber 305b transfers the heat from the heat dissipation network 302 to the outer wall through the heat exchange channel 305c (made of aluminum alloy, with a fluoropolymer hydrophobic coating on the inner wall), reducing the temperature of the main air chamber. The vibrating screen 305d is driven by airflow to vibrate, removing SF6 decomposition byproducts (such as SOF2), preventing channel blockage, and maintaining efficient heat exchange. The collection tank 305e collects byproducts, facilitating regular cleaning and reducing maintenance frequency. The self-cleaning heat exchange component 305 ensures long-term heat dissipation efficiency and extends the life of the equipment through the synergistic effect of the hydrophobic coating and the vibrating screen.

[0051] The collection box 305f is slidably connected to the interior of the collection tank 305e, and a handle 305g is fixed to the outer wall of the collection box 305f. The collection box 305f is made of stainless steel and slides easily from the inspection port at the bottom of the cabinet to collect byproducts and simplify cleaning. The handle 305g is easy to operate and, combined with the inspection port design (equipped with a silicone gasket), ensures that no SF6 leaks during the cleaning process. The detachable design of the collection tank 305e and collection box 305f supports low-maintenance operation and reduces the impact of byproducts on system performance.

[0052] An exhaust port 103 is provided on the upper side of the cabinet 100. The output end of the exhaust port 103 is connected to the outside world, and the input end is connected to the circulation chamber 305b. A second one-way valve assembly 104 is provided inside the exhaust port 103. The exhaust port 103 (equipped with a weatherproof cover) is located at the top of the cabinet and exhausts a trace amount of hot air (<0.01% / hour), maintaining the temperature of the main gas chamber stable while preventing external air from entering and protecting the SF6 gas environment. The second one-way valve assembly 104 includes a sealing plate 104a that is sealed at the intersection of the wide and narrow channels inside the exhaust port 103. A second telescopic spring 104b is fixedly connected to the inner side of the sealing plate 104a, and the other end of the second telescopic spring 104b is fixedly connected to the inner wall of the connection frame 305a. Sealing plate 104a, made of stainless steel, is normally closed under the tension of a second telescopic spring 104b (stainless steel, tension 0.05-0.1 bar), preventing SF6 gas leakage. When the hot air pressure in the circulation chamber exceeds 0.05 bar, the sealing plate opens, exhausting the hot air. SF6 gas, due to its high molecular weight (146 g / mol), is deposited at the bottom of the circulation chamber and preferentially circulates back to the main gas chamber. The second check valve assembly 104 achieves precise pressure control, balancing heat dissipation and gas retention, optimizing system efficiency.

[0053] It should be noted that the molecular weight of SF6 gas (146 g / mol) is much greater than that of air (29 g / mol), and it tends to settle within the circulation chamber 305b rather than exit through the exhaust port 103 above. The second one-way valve ensures that only a small amount of hot air is discharged, while the SF6 gas circulates within the channel due to pressure and density differences. This design effectively reduces SF6 emissions, meeting environmental requirements. At the same time, the synergistic effect of the circulation chamber and heat exchange channel maintains thermal equilibrium within the main gas chamber.

[0054] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0055] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0056] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A fully insulated high-voltage inflatable cabinet, characterized by: include, A cabinet (100), wherein an air-filling box (101) is fixedly installed at the center of the cabinet (100), and a main air chamber (102) is provided inside the air-filling box (101); A partitioned airbag array mechanism (200) comprises a plurality of flexible airbags (201) arrayed and distributed on the lower side of the main air chamber (102); the plurality of flexible airbags (201) are fixed to the inner wall of the inflatable box (101) via flexible brackets (202); the bottom ends of the plurality of flexible airbags (201) extend to the inner bottom wall of the inflatable box (101) and are connected to a first one-way valve assembly (204) via a micro elastic tube (203); the bottom ends of the plurality of first one-way valve assemblies (204) are connected to a manifold (205); the rear end of the manifold (205) is connected to a guide tube (206); and the output end of the guide tube (206) extends to the inner top wall of the inflatable box (101) and passes through to the upper side of the main air chamber (102); a pressure response distribution assembly (207) is provided on one side of the plurality of flexible brackets (202); and, The thermal linkage heat exchange mechanism (300) comprises a fixing frame (301) fixedly mounted on the left and right sides of the main air chamber (102); a honeycomb heat dissipation net (302) is provided inside the fixing frame (301) and close to the inner wall of the inflation box (101); movable components (303) are symmetrically provided on the front and rear sides of the fixing frame (301); a plurality of bimetallic heat sinks (304) are provided between two groups of the movable components (303); and self-cleaning heat exchange components (305) are provided on opposite sides of the two groups of the fixing frames (301).

2. The fully insulated high-voltage gas-filled cabinet according to claim 1, characterized in that: The first one-way valve assembly (204) includes a connecting channel (204a) provided directly below the micro elastic tube (203), and the connecting channel (204a) is a through-structure with a narrow top and a wide bottom. The top end of the connecting channel (204a) is connected to the output end of the micro elastic tube (203), and the bottom end is connected to the manifold (205). The inner top wall of the connecting channel (204a) is fixedly connected to a first telescopic spring (204b), and the bottom end of the first telescopic spring (204b) is fixedly connected to a sealing sheet (204c), and the sealing sheet (204c) is movably engaged at the intersection of the narrow channel and the wide channel of the connecting channel (204a).

3. The fully insulated high-voltage gas-filled cabinet according to claim 2, characterized in that: The pressure response distribution assembly (207) includes a fixed cylinder (207a) fixedly mounted on the inner top wall of the inflation box (101), a telescopic cavity (207b) is provided on the lower side of the interior of the fixed cylinder (207a), and openings (207c) are symmetrically provided on the left and right sides of the telescopic cavity (207b), an expansion spring (207d) is fixedly connected to the inner top wall of the telescopic cavity (207b), a hollow float (207e) is fixedly connected to the bottom end of the expansion spring (207d), a U-shaped connecting rod (207f) is fixedly connected to the bottom end of the hollow float (207e), and the other end of the U-shaped connecting rod (207f) passes through the manifold (205) and extends into the connecting channel (204a) to be fixedly connected to the bottom end of the sealing plate (204c).

4. The fully insulated high-voltage gas-filled cabinet according to claim 3, characterized in that: The top of the plurality of pressure response distribution components (207) is provided with a main valve component (208), the main valve component (208) includes a cavity (208a) opened on the top wall of the inflation box (101), and the tops of the plurality of fixed cylinders (207a) are connected to the cavity (208a), the middle of the cavity (208a) is slidably connected to a pressure plate (208b), and the middle of the top of the pressure plate (208b) is provided with a Bolt (208c), and the top end of the bolt (208c) sequentially penetrates the top wall of the inflation box (101) and the cabinet (100) and extends to the outside thereof to be fixedly connected with a knob (208d), the bottom end of the pressure plate (208b) is arrayed with push rods (208e), and the bottom ends of multiple push rods (208e) respectively extend into the interior of multiple fixed cylinders (207a) and are respectively connected with multiple hollow floats (207e).

5. The fully insulated high-voltage gas-filled cabinet according to claim 4, characterized in that: The two groups of movable components (303) respectively include fixed frames (303a) fixedly connected to the front wall and the rear wall inside the fixed frame (301); the interiors of the two fixed frames (303a) are slidably connected to slide plates (303b) that can slide up and down; a plurality of hinge shafts (303c) are arranged on opposite surfaces of the two slide plates (303b) at equal intervals from top to bottom; and a plurality of bimetallic heat sinks (304) are respectively hinged between each two hinge shafts (303c).

6. The fully insulated high-voltage gas-filled cabinet according to claim 5, characterized in that: The outer surfaces of the plurality of flexible airbags (201) are all covered with a layer of thermosensitive elastic film (201a), and the outer surface of the flexible airbag (201) close to the fixing frame (301) is hinged with a connecting rod (201b), and the other end of the connecting rod (201b) is hinged to the bottom end of the slide plate (303b).

7. The fully insulated high-voltage gas-filled cabinet according to claim 6, characterized in that: The self-cleaning heat exchange component (305) comprises a connection frame (305a) embedded in the outer walls of the left and right sides of the inflation box (101); a circulation cavity (305b) is provided on the outer side of the interior of the connection frame (305a); the input end of the circulation cavity (305b) is connected to a plurality of heat exchange channels (305c), and the inlet ends of the plurality of heat exchange channels (305c) are connected to the honeycomb holes of the heat dissipation network; a vibrating screen (305d) is provided at the connection between the circulation cavity (305b) and the plurality of heat exchange channels (305c); and a collection tank (305e) is provided at the bottom end of the circulation cavity (305b).

8. The fully insulated high-voltage gas-filled cabinet according to claim 7, characterized in that: The interior of the collecting tank (305e) is slidably connected to a collecting box (305f), and a handle (305g) is fixedly mounted on the outer wall of the collecting box (305f).

9. The fully insulated high-voltage gas filling cabinet according to claim 8, characterized in that: An exhaust port (103) is provided on the upper side of the cabinet (100), the output end of the exhaust port (103) is connected to the outside, the input end is connected to the circulation chamber (305b), and a second one-way valve assembly (104) is provided inside the exhaust port (103).

10. The fully insulated high-voltage gas filling cabinet according to claim 9, characterized in that: The second one-way valve assembly (104) comprises a sealing plate (104a) that seals at the intersection of the wide and narrow channels inside the exhaust port (103); a second telescopic spring (104b) is fixedly connected to the inner side of the sealing plate (104a), and the other end of the second telescopic spring (104b) is fixedly connected to the inner wall of the connection frame (305a).

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