An environmentally friendly gas-insulated ring network cabinet

Abstract

The present invention relates to the technical field of insulated ring network cabinets, and specifically to an environmentally friendly gas insulated ring network cabinet. The invention comprises a gas supply cabinet fixedly mounted on the ring network cabinet, and a gas supply mechanism, a closing and opening mechanism, and an exhaust mechanism installed in the gas supply cabinet. The gas supply mechanism comprises a nitrogen gas supply tank and a gas storage tank for gas supply arranged in a gas supply chamber, and a ventilation component and a gas supply pipe installed in the gas storage tank. The gas supply pipe is used to connect the nitrogen gas supply tank and the gas storage tank with the interior of the ring network cabinet. The exhaust mechanism comprises an exhaust component and a filter box, and a moisture filter component and an oxygen filter component installed in the filter box. The exhaust component comprises an exhaust pipe, a high-speed exhaust fan, a first air duct, and a second air duct. The present invention can provide high-voltage insulating gas to the interior of the ring network cabinet after a gas leak occurs inside the ring network cabinet, so as to maintain the air pressure inside the ring network cabinet, ensure the normal operation of the ring network cabinet for a period of time, and avoid the occurrence of long power outages.

Description

Technical Field

[0001] The present invention relates to the technical field of insulating ring main unit (RMU), and in particular to an environmentally friendly gas-insulated RMU. Background Art

[0002] In existing equipment, gas-insulated ring main units (RMUs) are generally installed outdoors. After long-term use, there is a certain risk of gas leakage, which can lead to a decrease in insulation performance, reduced arc extinguishing capability, and affect the stability of the power grid. Gas leakage in RMUs is a serious problem that needs to be discovered and handled in a timely manner to ensure the safe and reliable operation of the equipment. It is usually more convenient to deal with gas-insulated RMUs in cities, but when dealing with places with sparse populations and inconvenient transportation, such as rural areas, mountainous areas, and wilderness, it takes a long time for maintenance personnel to reach the RMUs and perform maintenance on them. In order to prevent the power grid from being cut off for a long time and causing power outages, there is an urgent need for a device that can maintain stable operation for a long time even when there is a slight gas leak in the RMU, maintain the internal insulating gas pressure, and provide sufficient insulating gas, thereby providing operators with sufficient maintenance time. During this process, the RMU can still operate normally. Summary of the Invention

[0003] Based on this, it is necessary to provide an environmentally friendly gas insulated ring main unit to address the existing technical problems.

[0004] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0005] The present invention provides an environmentally friendly gas insulated ring network cabinet, comprising a gas supply cabinet fixedly mounted on the ring network cabinet, and a gas supply mechanism, a closed opening and closing mechanism, and an exhaust mechanism installed in the gas supply cabinet. The gas supply cabinet is provided with a drive room, a gas supply chamber, and a battery. The side wall of the gas supply chamber is provided with an exhaust channel for exhausting gas from the closed opening and closing mechanism. The gas supply mechanism comprises a nitrogen gas supply tank and a gas storage tank for supplying gas arranged in the gas supply chamber, and a ventilation component and a gas supply pipe installed in the gas storage tank. The gas supply pipe is used to connect the nitrogen gas supply tank and the gas storage tank with the interior of the ring network cabinet. A solenoid valve is provided on the gas supply pipe. The closed opening and closing mechanism comprises a sealing barrier door slidably arranged on the side wall of the gas supply cabinet. The exhaust mechanism comprises an exhaust gas pump. The assembly and the filter box, as well as the moisture filter assembly and the oxygen filter assembly installed in the filter box, the exhaust assembly includes an exhaust pipe, a high-speed exhaust fan, a first air duct and a second air duct, the high-speed exhaust fan is arranged in the drive room, the exhaust pipe is connected to the high-speed exhaust fan, the other end of the exhaust pipe is arranged at the exhaust channel, one end of the first air duct is connected to the high-speed exhaust fan, the other end of the first air duct is connected to the air inlet of the filter box, one end of the second air duct is connected to the air outlet of the filter box, and the other end of the second air duct is connected to the gas storage tank. The nitrogen supply tank and the gas storage tank are initially filled with nitrogen, and the ventilation assembly is used to separate the initial nitrogen in the gas storage tank from the subsequently filled gas.

[0006] Preferably, the moisture filter components and the oxygen filter components are each provided with several groups, and the several groups of moisture filter components and oxygen filter components are arranged in sequence in the horizontal direction in the filter box. The filter box includes an air separation channel, an air combination channel, an air separation pipe, a pipe switch and a middle partition. There are several air separation pipes and they correspond one to one to the several groups of moisture filter components and oxygen filter components. There is a middle partition between every two groups of oxygen filter components. There is a pipe switch on each air separation pipe. The air separation channel is fixedly installed at the bottom of the filter box, and the air combination channel is fixedly installed at the top of the filter box.

[0007] Preferably, the moisture filtration component includes an adsorption tower and a detachable interface. The adsorption tower is vertically arranged, and both ends of the adsorption tower are connected to the gas distribution pipe through the detachable interface. The adsorption tower is filled with adsorbent.

[0008] Preferably, the oxygen filter assembly includes a sealing plate, a second sealing strip, a quick-swap chamber, a limit strip, a mounting plate, a through-tube rack, an exhaust hole, a separation membrane and a connecting pipe. The sealing plate is vertically arranged, and the internal space in the filter box is divided into a plurality of deoxygenation cavities by an intermediate partition. The sealing plate is detachably mounted on the filter box, and the sealing plate seals the deoxygenation cavity through a plurality of second sealing strips mounted thereon. There are a plurality of quick-swap chambers, and the plurality of quick-swap chambers are arranged in sequence along the vertical direction. Each quick-swap chamber is equipped with a mounting plate, a through-tube rack, an exhaust hole and a separation membrane. There are two mounting plates, which are horizontally mounted at the upper and lower ends of the quick-swap chamber, respectively. The through-tube rack is through-arranged Placed on two mounting plates, there are several through-tube racks, and a separation membrane is installed on the outside of each through-tube rack. An exhaust hole for discharging oxygen is provided on the side wall of the quick-plug chamber away from the opening of the filter box. The side of the filter box away from the opening is connected to an oxygen exhaust pipe, and the other end of the oxygen exhaust pipe is connected to the outside of the gas supply cabinet. Sliding limit grooves for limited installation are provided on the mounting plate and the inner wall of the oxygen filter assembly. A limit strip that slides with the sliding limit groove is provided on the outer wall of the quick-plug chamber, and a rubber sealing strip is provided on the limit strip. Every two quick-plug chambers are connected through a connecting pipe, and the second sealing strip corresponds to the quick-plug chamber one by one. A pressure switch valve is provided on the connecting pipe.

[0009] Preferably, the closed opening and closing mechanism also includes a push opening and closing component, a transmission component, a metal barrier mesh cover and a first fixed frame. The first fixed frame is fixedly mounted on the inner wall of the gas supply cabinet. The push opening and closing component is vertically mounted in the drive room. The output end of the push opening and closing component is transmission-connected to the sealed barrier door. The transmission component is transmission-connected to the output end of the push opening and closing component. The metal barrier mesh cover is fixedly mounted on the outer wall of the gas supply cabinet. The metal barrier mesh cover is located outside the exhaust channel. The exhaust component also includes a trumpet-shaped exhaust head and a rubber plug. The trumpet-shaped exhaust head is fixedly mounted on the first fixed frame. The opening of the trumpet-shaped exhaust head points to the exhaust channel. The trumpet-shaped exhaust head is connected to the exhaust pipe. The rubber plug is slidably mounted on the trumpet-shaped exhaust head. The transmission component is transmission-connected to the rubber plug.

[0010] Preferably, the pushing opening and closing assembly includes a limit mounting plate, a limit rod, a first linear drive and a first push rod, the first linear drive is fixedly mounted on the drive chamber, the sealed barrier door is composed of a first sealing strip, a transmission plate and a sealing sliding plate, the first sealing strip for sealing with the exhaust channel is mounted on the sealing sliding plate, the sealing sliding plate is vertically arranged, the transmission plate is horizontally arranged at the bottom of the sealing sliding plate, the transmission plate is provided with a limit sliding groove for the sealing sliding plate to slide, the first push rod is vertically arranged, the movable end of the first linear drive is fixedly connected to the first push rod, the other end of the first push rod is fixedly connected to the transmission plate, the limit rod is horizontally fixedly mounted on the sealing sliding plate, the limit mounting plate is vertically mounted on the outer wall of the gas supply cabinet, the limit mounting plate is provided with a sliding groove and an arc hook groove, the sliding groove is connected to the arc hook groove, the sliding groove is vertically arranged, and the limit rod is slidably set on the limit mounting plate through the sliding groove and the arc hook groove.

[0011] Preferably, the transmission assembly includes a rack, a driving gear, a collar, an annular mounting frame and a fixed rod, the rack is vertically slidably arranged on the first fixing frame, the rack is fixedly connected to the first push rod, the collar is coaxially arranged with the exhaust pipe and the trumpet-shaped exhaust head, the inner wall of the collar is threadedly matched with the outer wall of the exhaust pipe and the trumpet-shaped exhaust head, the outer wall of the annular mounting frame is fixedly connected to the inner wall of the collar, the annular mounting frame is fixedly connected to the rubber plug, the trumpet-shaped exhaust head is fixedly connected to the first fixing frame through the fixed rod, the driving gear is fixedly mounted on the outer wall of the collar, and the collar is meshed with the driving gear.

[0012] Preferably, the ventilation assembly includes a second linear drive, a sealing partition and a second push rod, the second linear drive is vertically fixedly installed in the drive chamber, the second push rod is vertically arranged, the second push rod and the gas tank are coaxially arranged, the sealing partition is arranged inside the gas tank, the outer wall of the sealing partition is fit with the inner wall of the gas tank, the bottom end of the second push rod is fixedly connected to the movable end of the second linear drive, the top of the second push rod is fixedly connected to the sealing partition, the second push rod and the gas tank are sealed and slidably matched, the interface between the second air duct and the gas tank is arranged on the side wall of the gas tank, the bottom of the gas tank is provided with an exhaust outlet, the exhaust outlet is provided with a one-way valve, the gas tank is provided with two air supply ports, the two air supply ports are respectively located at the top of the gas tank and the side wall of the gas tank, an electromagnetic valve is provided outside the two air supply ports, and the two air supply ports are connected to the air supply pipe.

[0013] Preferably, the air extraction assembly includes a booster pump, which is installed in the driving chamber and located at one end of the second air duct close to the air storage tank, and a one-way valve is provided on the second air duct.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When a gas leak is discovered inside the ring main unit (RMU), high-pressure gas is supplied to the RMU through the gas supply mechanism to maintain the internal air pressure of the RMU. This not only ensures the normal operation of the RMU, but also prevents the outside air from flowing back into the RMU through the leak after the air pressure drops, causing safety hazards. In the early stage of the leak, the gas is supplied by the gas tank as the gas source, and in the later stage, the internal space of the gas tank is replaced by filtered compressed air. After the gas supply mechanism has supplied gas for a period of time, the amount of nitrogen in the gas tank drops to a low value. At this time, the gas supply is switched to a mixed gas supply from the nitrogen supply tank and the compressed air inside the gas tank. This method can not only ensure sufficient gas supply, but also further mix the compressed air, that is, reduce the oxygen content, increase the overall gas supply time and gas pressure of the gas supply mechanism, and increase the continuous use time of the equipment, thereby ensuring the normal and stable operation of the equipment as much as possible.

[0016] 2. This invention extracts, compresses, and separates air, removing moisture and oxygen. The remaining dry air is then directed to a gas storage tank for pressurized storage. When needed, it is mixed with nitrogen from a nitrogen supply tank and introduced into the ring main unit. Membrane separation offers the advantages of low energy consumption and the absence of chemical reagents. After multiple repeated separation stages, the oxygen content in the dry air is reduced to a low level, thereby improving isolation and insulation.

[0017] 3. The equipment can still keep its interior clean after being placed for a long time, and the equipment can quickly start the vacuum function when vacuuming is required.

[0018] 4. At this time, the gas in the gas tank is newly filled filtered compressed air, which can be used as a new gas source to provide auxiliary gas supply to the inside of the ring network cabinet, minimizing the impact of air leakage on the inside of the ring network cabinet.

[0019] 5. The booster pump boosts the compressed air in the gas tank to increase the gas pressure, and the one-way valve prevents backflow. Boosting can increase the gas pressure when the gas tank is discharged, that is, it ensures that the high-pressure gas can be introduced into the ring network cabinet, thereby increasing the air pressure inside the ring network cabinet and ensuring that when the ring network cabinet leaks, the gas flows from the inside to the outside, and the external untreated air enters the ring network cabinet through the leakage point, thereby maintaining the insulation environment inside the ring network cabinet for a longer period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the gas supply cabinet in an environmentally friendly gas insulated ring main unit;

[0021] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the gas supply cabinet in an environmentally friendly gas insulated ring network cabinet. Figure 1 ;

[0022] Figure 3 This is a side view of the interior of the gas supply cabinet in an environmentally friendly gas insulated ring main unit;

[0023] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the gas supply cabinet in an environmentally friendly gas insulated ring network cabinet. Figure 2 ;

[0024] Figure 5 It is a schematic diagram of a partial three-dimensional structure of an environmentally friendly gas insulated ring main unit;

[0025] Figure 6 It is a three-dimensional structural diagram of the closed opening and closing mechanism in an environmentally friendly gas-insulated ring main unit;

[0026] Figure 7 This is a cross-sectional view of the exhaust mechanism and transmission components in an environmentally friendly gas-insulated ring main unit;

[0027] Figure 8 This is a front view of the exhaust mechanism in an environmentally friendly gas-insulated ring main unit;

[0028] Figure 9 This is a schematic diagram of the filter box and its internal structure in an environmentally friendly gas insulated ring network cabinet;

[0029] Figure 10 This is a three-dimensional exploded view of the oxygen filter component in an environmentally friendly gas insulated ring main unit;

[0030] Figure 11 This is a three-dimensional exploded view of the internal structure of the quick-swap chamber in an environmentally friendly gas-insulated ring main unit;

[0031] Figure 12 This is a cross-sectional view of the gas storage tank and ventilation components in an environmentally friendly gas-insulated ring main unit.

[0032] 1. Gas supply cabinet; 11. Drive chamber; 12. Gas supply chamber; 13. Exhaust channel; 14. Battery; 2. Gas supply mechanism; 21. Nitrogen gas supply tank; 22. Gas storage tank; 23. Ventilation assembly; 231. Second linear actuator; 232. Sealing partition; 233. Second push rod; 24. Gas supply pipe; 3. Closing and closing mechanism; 31. Sealing barrier door; 311. First sealing strip; 312. Transmission plate; 313. Sealing sliding plate; 32. Pushing and closing assembly; 321. Limiting mounting plate; 322. Sliding groove; 323. Arc hook groove; 324. Limiting rod; 325. First linear actuator; 326. First push rod; 33. Transmission assembly; 331. Rack; 332. Drive gear; 333. Collar; 334. Annular mounting bracket; 335. Fixing rod; 34. Metal barrier Mesh cover; 35. First fixing frame; 4. Exhaust mechanism; 41. Exhaust assembly; 411. Exhaust pipe; 412. High-speed exhaust fan; 413. Trumpet-shaped exhaust head; 414. Rubber plug; 415. First air duct; 416. Second air duct; 417. Booster pump; 42. Filter box; 421. Gas distribution channel; 422. Gas combination channel; 423. Gas distribution pipe; 424. Pipe switch; 425. Middle partition; 426. Sliding limit groove; 427. Oxygen exhaust pipe; 43. Moisture filter assembly; 431. Adsorption tower; 432. Removable interface; 44. Oxygen filter assembly; 441. Sealing plate; 442. Second sealing strip; 443. Quick plug-in chamber; 444. Limit strip; 445. Mounting plate; 446. Through-tube rack; 447. Exhaust hole; 448. Separation membrane; 449. Connecting pipe. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1-12An environmentally friendly gas insulated ring network cabinet shown in the figure includes a gas supply cabinet 1 fixedly installed on the ring network cabinet and a gas supply mechanism 2, a closed opening and closing mechanism 3 and an exhaust mechanism 4 installed in the gas supply cabinet 1. A drive room 11, a gas supply chamber 12 and a battery 14 are provided in the gas supply cabinet 1. An exhaust channel 13 for exhausting gas from the closed opening and closing mechanism 3 is provided on the side wall of the gas supply chamber 12. The gas supply mechanism 2 includes a nitrogen gas supply tank 21 and a gas storage tank 22 for supplying gas arranged in the gas supply chamber 12, and a ventilation component 23 and a gas supply pipe 24 installed in the gas storage tank 22. The gas supply pipe 24 is used to connect the nitrogen gas supply tank 21 and the gas storage tank 22 with the interior of the ring network cabinet. A solenoid valve is provided on the gas supply pipe 24. The closed opening and closing mechanism 3 includes a sealed barrier door 31 slidably arranged on the side wall of the gas supply cabinet 1. The exhaust mechanism 4 includes an exhaust component 41 and a filter box 42 and a filter box 42 installed in the gas storage tank 22. The moisture filter assembly 43 and the oxygen filter assembly 44 in the filter box 42, the exhaust assembly 41 includes an exhaust pipe 411, a high-speed exhaust fan 412, a first air duct 415 and a second air duct 416. The high-speed exhaust fan 412 is arranged in the drive chamber 11, the exhaust pipe 411 is connected to the high-speed exhaust fan 412, and the other end of the exhaust pipe 411 is arranged at the exhaust channel 13. One end of the first air duct 415 is connected to the high-speed exhaust fan 412, and the other end of the first air duct 415 is connected to the air inlet of the filter box 42, one end of the second air duct 416 is connected to the air outlet of the filter box 42, and the other end of the second air duct 416 is connected to the gas storage tank 22. The nitrogen supply tank 21 and the gas storage tank 22 are initially filled with nitrogen. The ventilation assembly 23 is used to separate the initial nitrogen in the gas storage tank 22 from the subsequently filled gas.

[0035] When a gas leak is detected inside the ring network cabinet, the air pressure sensor installed inside the ring network cabinet detects that the air pressure inside the ring network cabinet has dropped. At this time, it is necessary to provide high-pressure gas to the inside of the ring network cabinet through the air supply mechanism 2 to maintain the air pressure inside the ring network cabinet. This can not only ensure the normal operation of the ring network cabinet, but also prevent the outside air from flowing back into the ring network cabinet through the leak after the air pressure drops, causing safety hazards. Nitrogen supply is achieved by providing a nitrogen supply tank 21 and a gas storage tank 22. In order to prevent the inability to continue to provide insulating gas after the nitrogen is consumed, the air extraction, filtering and compression functions are achieved through the air extraction mechanism 4. The atmosphere is drawn into the equipment for filtration, water vapor and oxygen are filtered from the air, and the filtered dry gas is compressed into the gas storage tank 22 after use for storage. In order to store as much nitrogen as possible in the gas supply chamber 12, the inside of the gas storage tank 22 is also filled with nitrogen in the initial state. At the initial stage of the leak, the gas storage tank 22 is used as the gas. The gas source is used for gas supply, and the internal space of the gas tank 22 is replaced by filtered compressed air at a later stage. After the gas supply mechanism 2 supplies gas for a period of time, the amount of nitrogen in the gas tank 22 is reduced to a lower value. At this time, the nitrogen supply tank 21 and the compressed air inside the gas tank 22 are switched to mix the gas supply. This method can not only ensure sufficient gas supply, but also further mix the compressed air, that is, reduce the oxygen content, thereby increasing the overall gas supply time and gas supply pressure of the gas supply mechanism 2, increasing the continuous use time of the equipment, and ensuring the normal and stable operation of the equipment as much as possible.

[0036] Each of the moisture filter assembly 43 and the oxygen filter assembly 44 is provided with several groups, and the several groups of moisture filter assemblies 43 and oxygen filter assemblies 44 are arranged in sequence in the horizontal direction in the filter box 42. The filter box 42 includes a gas separation channel 421, a gas combination channel 422, a gas separation pipe 423, a pipeline switch 424 and a middle partition 425. There are several gas separation pipes 423 and they correspond one to one with the several groups of moisture filter assemblies 43 and oxygen filter assemblies 44. A middle partition 425 is provided between every two groups of oxygen filter assemblies 44. Each gas separation pipe 423 is provided with a pipeline switch 424. The gas separation channel 421 is fixedly installed at the bottom of the filter box 42, and the gas combination channel 422 is fixedly installed at the top of the filter box 42.

[0037] After the gas enters the filter box 42, the air is evenly introduced into several gas distribution pipes 423, and then introduced into several groups of moisture filter components 43 and oxygen filter components 44 for dehydration and deoxygenation operations. This method can improve the efficiency of gas treatment, thereby ensuring that the gas replenishment effect can be achieved quickly.

[0038] The moisture filtering assembly 43 includes an adsorption tower 431 and a detachable interface 432 . The adsorption tower 431 is vertically arranged. Both ends of the adsorption tower 431 are connected to the gas distribution pipe 423 through the detachable interface 432 . The adsorption tower 431 is filled with adsorbent.

[0039] The adsorbent is made of molecular sieve or activated alumina. The entire adsorption tower 431 can be quickly disassembled and replaced. The moisture filter assembly 43 removes moisture, drying the relatively moist air and preventing moisture from entering the ring main unit through the air supply, creating a safety hazard.

[0040] The oxygen filter assembly 44 includes a sealing plate 441, a second sealing strip 442, a quick-swap chamber 443, a limiting strip 444, a mounting plate 445, a through-tube rack 446, an exhaust hole 447, a separation membrane 448 and a connecting pipe 449. The sealing plate 441 is arranged vertically, and the internal space of the filter box 42 is divided into a plurality of deoxygenation cavities by the middle partition 425. The sealing plate 441 is detachably mounted on the filter box 42, and the sealing plate 441 seals the deoxygenation cavity through a plurality of second sealing strips 442 mounted thereon. There are a plurality of quick-swap chambers 443, and the plurality of quick-swap chambers 443 are arranged in sequence along the vertical direction. Each quick-swap chamber 443 is equipped with a mounting plate 445, a through-tube rack 446, an exhaust hole 447 and a separation membrane 448. There are two mounting plates 445, which are horizontally mounted at the upper and lower ends of the quick-swap chamber 443, respectively, and are mounted horizontally at the upper and lower ends of the through-tube rack 4 46 is set on two mounting plates 445, and several through-tube racks 446 are provided. A separation membrane 448 is installed on the outside of each through-tube rack 446. An exhaust hole 447 for discharging oxygen is provided on the side wall of the quick-plug chamber 443 away from the opening of the filter box 42. The side of the filter box 42 away from the opening is connected to an oxygen exhaust pipe 427, and the other end of the oxygen exhaust pipe 427 is connected to the outside of the gas supply cabinet 1. A sliding limit groove 426 for limiting installation is provided on the inner wall of the mounting plate 445 and the oxygen filter assembly 44. A limit strip 444 that slides with the sliding limit groove 426 is provided on the outer wall of the quick-plug chamber 443, and a rubber sealing strip is provided on the limit strip 444. Every two quick-plug chambers 443 are connected through a connecting pipe 449. The second sealing strip 442 corresponds one-to-one to the quick-plug chamber 443, and a pressure switch valve is provided on the connecting pipe 449.

[0041] When the oxygen filter assembly 44 is working, the dry gas that has completed the dehydration operation is introduced into the oxygen filter assembly 44. A number of quick-plug chambers 443 are provided from bottom to top in the oxygen filter assembly 44. Each quick-plug chamber 443 is provided with a mounting plate 445 for separating oxygen. During this separation process, the dry gas can be filtered at multiple stages to maximize the deoxygenation effect. The through-tube rack 446 is used to connect each quick-plug chamber 443. The internal filler of the oxygen filter assembly 44 can be replaced. When the mounting plate 445 in the quick-plug chamber 443 is removed, the oxygen filter assembly 44 can be replaced. After use, the quick-swap chamber 443 can be removed from the filter box 42 by opening the sealing plate 441. The quick-swap chamber 443 is detachably connected to the filter box 42 via a sliding stopper groove 426 and a stopper strip 444. Once the sealing plate 441 is installed, a second sealing strip 442 provided on the sealing plate 441 seals each quick-swap chamber 443 from the deoxygenation cavity, ensuring that the dry gas can only pass vertically through the mounting plates 445 within the quick-swap chambers 443 for deoxygenation and filtration before subsequent use. This device can be quickly disassembled and maintained, and when not in use, it maintains an internal seal, extending the duration of the efficient deoxygenation effect. It is worth noting that the mounting plate 445 is an inorganic membrane, a polymer membrane, or a hollow fiber membrane, each of which has different permeabilities to other gases such as oxygen and nitrogen. A pressure switch valve installed on connecting pipe 449 maintains a certain pressure differential between the interior of quick-swap chamber 443 and the outside world, allowing the gas inside quick-swap chamber 443 to flow outward from through-tube holder 446. As the gas flows outward, it is separated by separation membrane 448, with oxygen passing through separation membrane 448 and discharged to the outside through exhaust hole 447 and oxygen discharge pipe 427. When the pressure reaches a certain level, the pressure switch valve opens, allowing the separated gas to pass through connecting pipe 449 and enter the next quick-swap chamber 443 for further separation, until the multi-stage separation is completed and the gas is discharged. Under a certain pressure differential, oxygen is preferentially separated through mounting plate 445. Membrane separation has the advantages of low energy consumption and no chemical reagent consumption. After multiple stages of separation, the oxygen content in the dry gas is reduced to a low level, thereby improving isolation and insulation.

[0042] The closed opening and closing mechanism 3 also includes a pushing opening and closing component 32, a transmission component 33, a metal barrier mesh cover 34 and a first fixed frame 35. The first fixed frame 35 is fixedly installed on the inner wall of the gas supply cabinet 1. The pushing opening and closing component 32 is vertically installed in the driving chamber 11. The output end of the pushing opening and closing component 32 is transmission-connected to the sealed barrier door 31. The transmission component 33 is transmission-connected to the output end of the pushing opening and closing component 32. The metal barrier mesh cover 34 is fixedly installed on the outer wall of the gas supply cabinet 1. The metal barrier mesh cover 34 is located outside the exhaust channel 13. The exhaust component 41 also includes a trumpet-shaped exhaust head 413 and a rubber plug 414. The trumpet-shaped exhaust head 413 is fixedly installed on the first fixed frame 35. The opening of the trumpet-shaped exhaust head 413 points to the exhaust channel 13. The trumpet-shaped exhaust head 413 is connected to the exhaust pipe 411. The rubber plug 414 is slidably installed on the trumpet-shaped exhaust head 413. The transmission component 33 is transmission-connected to the rubber plug 414.

[0043] When the closed opening and closing mechanism 3 is working, the sealing barrier door 31 can be pushed upward by pushing the opening and closing component 32, and the sealing barrier door 31 is released from the sealed connection with the side wall of the gas supply cabinet 1, and the exhaust channel 13 on the side wall of the gas supply cabinet 1 is opened, so that the air outside the gas supply cabinet 1 can flow smoothly into the gas supply cabinet 1. By setting the metal barrier mesh cover 34, larger impurities can be blocked on the outside of the gas supply cabinet 1. When the pushing opening and closing component 32 is working, it can drive the transmission component 33 to move. When the transmission component 33 moves, the rubber plug 414 inside the trumpet-shaped exhaust head 413 can be pulled out from the trumpet-shaped exhaust head 413, so that the trumpet-shaped exhaust head 413 can realize the rapid exhaust function. The rubber plug 414 ensures that the exhaust pipe 411 can be blocked when the exhaust mechanism 4 is not enabled, so that dust and other impurities cannot enter the exhaust pipe 411, and the equipment can still keep the interior clean after being placed for a long time.

[0044] The push opening and closing assembly 32 includes a limit mounting plate 321, a limit rod 324, a first linear driver 325 and a first push rod 326. The first linear driver 325 is fixedly mounted on the drive chamber 11. The sealing barrier door 31 is composed of a first sealing strip 311, a transmission plate 312 and a sealing sliding plate 313. The first sealing strip 311 for sealing with the exhaust channel 13 is mounted on the sealing sliding plate 313. The sealing sliding plate 313 is vertically arranged, and the transmission plate 312 is horizontally arranged at the bottom of the sealing sliding plate 313. A limit sliding groove for the sliding of the sealing sliding plate 313 is provided on the transmission plate 312. A push rod 326 is vertically arranged. The movable end of the first linear actuator 325 is fixedly connected to the first push rod 326. The other end of the first push rod 326 is fixedly connected to the transmission plate 312. The limit rod 324 is horizontally fixedly mounted on the sealing sliding plate 313. The limit mounting plate 321 is vertically mounted on the outer wall of the gas supply cabinet 1. The limit mounting plate 321 is provided with a sliding groove 322 and an arcuate hook groove 323. The sliding groove 322 is connected to the arcuate hook groove 323. The sliding groove 322 is vertically arranged. The limit rod 324 is slidably mounted on the limit mounting plate 321 through the sliding groove 322 and the arcuate hook groove 323. In this embodiment, the first linear actuator 325 is an electric cylinder.

[0045] When the push-opening and closing assembly 32 is working, the first push rod 326 is pushed upward by the first linear driver 325, and the upward movement of the first push rod 326 drives the transmission plate 312 to move upward. When the transmission plate 312 moves, the sealing sliding plate 313 is synchronously displaced upward. The limit mounting plate 321 and the limit rod 324 guide and limit the movement of the sealing sliding plate 313. The limit rod 324 can be slidably set in the sliding groove 322 and the arc-shaped hook groove 323, so that the sealing sliding plate 313 moves outward to the outside of the gas supply cabinet 1 while moving upward, and then moves vertically upward until it avoids the exhaust channel 13. When resetting, it first descends to a certain height and then retracts into the gas supply cabinet 1, so that the first sealing strip 311 can fit and seal with the exhaust channel 13.

[0046] The transmission assembly 33 includes a rack 331, a driving gear 332, a collar 333, an annular mounting bracket 334 and a fixing rod 335. The rack 331 is vertically slidably set on the first fixing bracket 35. The rack 331 is fixedly connected to the first push rod 326. The collar 333 is coaxially arranged with the exhaust pipe 411 and the trumpet-shaped exhaust head 413. The inner side wall of the collar 333 is threadedly matched with the outer side wall of the exhaust pipe 411 and the trumpet-shaped exhaust head 413. The outer side wall of the annular mounting bracket 334 is fixedly connected to the inner side wall of the collar 333. The annular mounting bracket 334 is fixedly connected to the rubber stopper 414. The trumpet-shaped exhaust head 413 is fixedly connected to the first fixing bracket 35 through the fixing rod 335. The driving gear 332 is fixedly mounted on the outer side wall of the collar 333. The collar 333 is meshed with the driving gear 332.

[0047] When the push-opening and closing assembly 32 is working, the movement of the first push rod 326 drives the rack 331 fixedly connected to it to rise and fall in the vertical direction. When the rack 331 is displaced, it drives the driving gear 332 meshing with it to rotate, and then drives the ring 333 fixedly connected to the driving gear 332 to rotate synchronously. Since the ring 333 is threadedly connected to the trumpet-shaped vacuum head 413 and the outer wall of the vacuum pipe 411, it can be displaced in the horizontal direction when the ring 333 rotates, so that the horizontal movement of the ring 333 can drive the rubber plug 414 to displace synchronously, and the rubber plug 414 can be pulled out from the trumpet-shaped vacuum head 413, thereby realizing the connection between the trumpet-shaped vacuum head 413 and the outside air.

[0048] The ventilation assembly 23 includes a second linear actuator 231, a sealing partition 232 and a second push rod 233. The second linear actuator 231 is vertically fixedly installed in the driving chamber 11. The second push rod 233 is vertically arranged. The second push rod 233 is coaxially arranged with the gas storage tank 22. The sealing partition 232 is arranged inside the gas storage tank 22. The outer wall of the sealing partition 232 is in contact with the inner wall of the gas storage tank 22. The bottom end of the second push rod 233 is fixedly connected to the movable end of the second linear actuator 231. The top end of the rod 233 is fixedly connected to the sealing partition 232. The second push rod 233 is in sealed sliding engagement with the gas tank 22. The interface between the second air guide tube 416 and the gas tank 22 is located on the side wall of the gas tank 22. The bottom of the gas tank 22 is provided with an exhaust outlet equipped with a one-way valve. The gas tank 22 is provided with two air supply ports, located at the top end and on the side wall of the gas tank 22, respectively. Both air supply ports are equipped with solenoid valves and are connected to the air supply pipe 24. In this embodiment, the second linear actuator 231 is also an electric cylinder.

[0049] While the gas tank 22 is supplying gas, the ventilation component 23 works to compress the air inside the gas tank 22 upward, and fills the vacant space with compressed air extracted and filtered by the exhaust mechanism 4. During this process, the sealing baffle 232 gradually moves upward under the push of the second push rod 233, so that the nitrogen originally stored in the gas tank 22 continues to gather upward, and finally supplies gas to the gas supply pipe 24 through the gas supply port at the top of the gas tank 22, and the other gas supply port is in a closed state. When the second push rod 233 in the gas tank 22 is pushed to the top, the gas in the gas tank 22 is the newly filled filtered compressed air, which can be used as a new gas source to assist in supplying gas to the inside of the ring network cabinet, thereby minimizing the impact of gas leakage on the inside of the ring network cabinet.

[0050] The air extraction assembly 41 includes a booster pump 417 . The booster pump 417 is installed in the driving chamber 11 and is located at one end of the second air pipe 416 close to the air tank 22 . A one-way valve is provided on the second air pipe 416 .

[0051] The booster pump 417 boosts the compressed air in the gas tank 22 to increase the gas pressure, and the one-way valve prevents backflow. The boosting can increase the gas pressure when the gas tank 22 discharges the gas, that is, it ensures that the high-pressure gas can be introduced into the interior of the ring network cabinet, thereby increasing the air pressure inside the ring network cabinet, ensuring that when the ring network cabinet is leaking, the gas flows from the inside to the outside, and the external untreated air enters the interior of the ring network cabinet through the leakage point, thereby maintaining the insulation environment inside the ring network cabinet for a longer period of time.

[0052] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An environmentally friendly gas insulated ring main unit, characterized in that: The invention comprises a gas supply cabinet (1) fixedly mounted on a ring network cabinet, and a gas supply mechanism (2), a closing and opening mechanism (3) and a gas extraction mechanism (4) mounted in the gas supply cabinet (1). The gas supply cabinet (1) is provided with a driving chamber (11), a gas supply chamber (12) and a battery (14). A gas extraction channel (13) for extracting gas from the closing and opening mechanism (3) is provided on a side wall of the gas supply chamber (12). The gas supply mechanism (2) comprises a nitrogen gas supply tank (21) for supplying gas and arranged in the gas supply chamber (12). ) and a gas storage tank (22) and a ventilation assembly (23) and a gas supply pipe (24) installed in the gas storage tank (22), the gas supply pipe (24) is used to connect the nitrogen gas supply tank (21) and the gas storage tank (22) with the interior of the ring network cabinet, a solenoid valve is provided on the gas supply pipe (24), the closing and opening mechanism (3) includes a sealing barrier door (31) slidably arranged on the side wall of the gas supply cabinet (1), the exhaust mechanism (4) includes an exhaust assembly (41) and a filter box (42) and an exhaust pipe (43) installed in the filter box ( 42) in the moisture filter assembly (43) and the oxygen filter assembly (44), the exhaust assembly (41) includes an exhaust pipe (411), a high-speed exhaust fan (412), a first air guide pipe (415) and a second air guide pipe (416), the high-speed exhaust fan (412) is arranged in the drive chamber (11), the exhaust pipe (411) is connected to the high-speed exhaust fan (412), the other end of the exhaust pipe (411) is arranged at the exhaust channel (13), the first air guide pipe (415) is connected to the ... connected to the first air guide pipe (415) ) is connected to the high-speed exhaust fan (412), the other end of the first air guide pipe (415) is connected to the air inlet of the filter box (42), one end of the second air guide pipe (416) is connected to the air outlet of the filter box (42), and the other end of the second air guide pipe (416) is connected to the gas storage tank (22), the nitrogen supply tank (21) and the gas storage tank (22) are initially filled with nitrogen, and the ventilation component (23) is used to separate the initial nitrogen in the gas storage tank (22) from the gas subsequently filled; The ventilation assembly (23) includes a second linear drive (231), a sealing partition (232) and a second push rod (233). The second linear drive (231) is vertically fixedly installed in the drive chamber (11). The second push rod (233) is vertically arranged. The second push rod (233) is coaxially arranged with the gas storage tank (22). The sealing partition (232) is arranged inside the gas storage tank (22). The outer wall of the sealing partition (232) is in contact with the inner wall of the gas storage tank (22). The bottom end of the second push rod (233) is fixedly connected to the movable end of the second linear drive (231). The top end of the second push rod (233) is fixedly connected to the sealing partition (232), and the second push rod (233) is sealed and slidably matched with the gas storage tank (22). The interface between the second air guide pipe (416) and the gas storage tank (22) is arranged on the side wall of the gas storage tank (22). The bottom of the gas storage tank (22) is provided with an exhaust outlet, and the exhaust outlet is provided with a one-way valve. The gas storage tank (22) is provided with two gas supply ports, which are respectively located at the top end of the gas storage tank (22) and on the side wall of the gas storage tank (22). Solenoid valves are provided outside the two gas supply ports, and the two gas supply ports are communicated with the gas supply pipe (24).

2. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The moisture filter assembly (43) and the oxygen filter assembly (44) are each provided with a plurality of groups. The plurality of groups of moisture filter assemblies (43) and oxygen filter assemblies (44) are sequentially arranged in the filter box (42) along the horizontal direction. The filter box (42) includes a gas separation channel (421), a gas combination channel (422), a gas separation pipe (423), a pipeline switch (424) and a middle partition (425). The gas separation pipe (423) is provided with a plurality of groups corresponding to the plurality of groups of moisture filter assemblies (43) and oxygen filter assemblies (44). A middle partition (425) is provided between every two groups of oxygen filter assemblies (44). A pipeline switch (424) is provided on each gas separation pipe (423). The gas separation channel (421) is fixedly mounted on the bottom of the filter box (42), and the gas combination channel (422) is fixedly mounted on the top of the filter box (42).

3. The environmentally friendly gas insulated ring main unit according to claim 2, characterized in that: The moisture filtering assembly (43) comprises an adsorption tower (431) and a detachable interface (432). The adsorption tower (431) is vertically arranged. Both ends of the adsorption tower (431) are connected to the gas distribution pipe (423) via the detachable interface (432). The adsorption tower (431) is filled with an adsorbent.

4. The environmentally friendly gas insulated ring main unit according to claim 3, characterized in that: The oxygen filter assembly (44) includes a sealing plate (441), a second sealing strip (442), a quick plug-in chamber (443), a limit strip (444), a mounting plate (445), a through-tube frame (446), an exhaust hole (447), a separation membrane (448) and a connecting pipe (449). The sealing plate (441) is vertically arranged. The internal space of the filter box (42) is divided into a plurality of deoxygenation cavities by the middle partition (425). The sealing plate (441) is detachably mounted on the filter box (42). The sealing plate (441) seals the deoxidation cavity through a plurality of second sealing strips (442) installed thereon. A plurality of quick-plug chambers (443) are provided. The plurality of quick-plug chambers (443) are arranged in sequence along the vertical direction. Each quick-plug chamber (443) is equipped with a mounting plate (445), a through-tube frame (446), an exhaust hole (447) and a separation membrane (448). Two mounting plates (445) are provided and are respectively installed horizontally at the upper and lower ends of the quick-plug chamber (443). The rack (446) is provided on two mounting plates (445), and a plurality of through-tube racks (446) are provided. A separation membrane (448) is installed on the outside of each through-tube rack (446). An exhaust hole (447) for discharging oxygen is provided on the side wall of the quick plug chamber (443) away from the opening of the filter box (42). An oxygen exhaust pipe (427) is connected to the side of the filter box (42) away from the opening. The other end of the oxygen exhaust pipe (427) is connected to the outside of the gas supply cabinet (1). The mounting plate (4 45) and the inner side wall of the oxygen filter assembly (44) are provided with a sliding limit groove (426) for limiting installation, and the outer side wall of the quick plug-in chamber (443) is provided with a limit strip (444) that slides with the sliding limit groove (426), and the limit strip (444) is provided with a rubber sealing strip. Every two quick plug-in chambers (443) are connected through a connecting pipe (449), and the second sealing strip (442) corresponds to the quick plug-in chamber (443) one by one. A pressure switch valve is provided on the connecting pipe (449).

5. The environmentally friendly gas insulated ring main unit according to claim 4, characterized in that: The closed opening and closing mechanism (3) further comprises a push opening and closing assembly (32), a transmission assembly (33), a metal barrier mesh cover (34) and a first fixed frame (35), wherein the first fixed frame (35) is fixedly mounted on the inner side wall of the gas supply cabinet (1), the push opening and closing assembly (32) is vertically mounted in the drive chamber (11), the output end of the push opening and closing assembly (32) is transmission-connected to the sealed barrier door (31), the transmission assembly (33) is transmission-connected to the output end of the push opening and closing assembly (32), and the metal barrier mesh cover (34) is fixedly mounted on the inner side wall of the gas supply cabinet (1). On the outer wall, the metal barrier mesh cover (34) is located outside the exhaust channel (13). The exhaust assembly (41) further includes a trumpet-shaped exhaust head (413) and a rubber plug (414). The trumpet-shaped exhaust head (413) is fixedly mounted on the first fixing frame (35). The opening of the trumpet-shaped exhaust head (413) points to the exhaust channel (13). The trumpet-shaped exhaust head (413) is connected to the exhaust pipe (411). The rubber plug (414) is slidably mounted on the trumpet-shaped exhaust head (413). The transmission assembly (33) is transmission-connected to the rubber plug (414).

6. The environmentally friendly gas insulated ring main unit according to claim 5, characterized in that: The push opening and closing assembly (32) includes a limiting mounting plate (321), a limiting rod (324), a first linear driver (325) and a first push rod (326). The first linear driver (325) is fixedly mounted on the driving chamber (11). The sealing barrier door (31) is composed of a first sealing strip (311), a transmission plate (312) and a sealing sliding plate (313). The first sealing strip (311) for sealing with the exhaust channel (13) is mounted on the sealing sliding plate (313). The sealing sliding plate (313) is vertically arranged. The transmission plate (312) is horizontally arranged at the bottom of the sealing sliding plate (313). The transmission plate (312) is provided with a limiting sliding groove for the sealing sliding plate (313) to slide. A push rod (326) is vertically arranged, a movable end of a first linear driver (325) is fixedly connected to the first push rod (326), the other end of the first push rod (326) is fixedly connected to the transmission plate (312), a limit rod (324) is horizontally fixedly mounted on the sealing sliding plate (313), a limit mounting plate (321) is vertically mounted on the outer wall of the gas supply cabinet (1), a sliding groove (322) and an arc-shaped hook groove (323) are provided on the limit mounting plate (321), the sliding groove (322) is connected to the arc-shaped hook groove (323), the sliding groove (322) is vertically arranged, and the limit rod (324) is slidably arranged on the limit mounting plate (321) through the sliding groove (322) and the arc-shaped hook groove (323).

7. The environmentally friendly gas insulated ring main unit according to claim 6, characterized in that: The transmission assembly (33) includes a rack (331), a driving gear (332), a collar (333), an annular mounting frame (334) and a fixing rod (335). The rack (331) is vertically slidably arranged on the first fixing frame (35). The rack (331) is fixedly connected to the first push rod (326). The collar (333) is coaxially arranged with the exhaust pipe (411) and the trumpet-shaped exhaust head (413). The inner side wall of the collar (333) is coaxial with the exhaust pipe (411) and the trumpet-shaped exhaust head (413). The outer side walls of the trumpet-shaped exhaust head (413) are engaged by threads, the outer side wall of the annular mounting frame (334) is fixedly connected to the inner side wall of the collar (333), the annular mounting frame (334) is fixedly connected to the rubber plug (414), the trumpet-shaped exhaust head (413) is fixedly connected to the first fixing frame (35) via a fixing rod (335), the driving gear (332) is fixedly mounted on the outer side wall of the collar (333), and the collar (333) is meshed with the driving gear (332).

8. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The air extraction assembly (41) includes a booster pump (417). The booster pump (417) is installed in the drive chamber (11) and is located at one end of the second air guide pipe (416) close to the air storage tank (22). A one-way valve is provided on the second air guide pipe (416).

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