An environmentally friendly gas-insulated ring network cabinet

Abstract

The embodiment of the present application provides an environmentally friendly gas-insulated ring network cabinet, which relates to the technical field of ring network cabinets. The environmentally friendly gas-insulated ring network cabinet includes a cabinet body, a cooling component, and an air pressure balancing component; an insulating chamber is provided in the inner lining box; the liquid outlet of the circulating pump is connected to one end of the heat pipe, and the other end of the heat pipe is connected to the liquid inlet of the container; a support block is installed in the piston cylinder through a support structure, the lower end of the spring is connected to the support block, and the upper end of the spring is connected to the piston. It plays the role of reducing and stabilizing the voltage, so that the pressure in the insulating chamber remains stable, and the gas expansion causes the cabinet body of the insulating chamber to deform, affecting the sealing and structural safety of the insulating chamber. At the same time, when an arc fault occurs due to improper inflation or operational errors, it can also buffer the impact caused by the instantaneous pressure increase caused by the explosion, play a protective role for the cabinet body, and avoid affecting the subsequent use of the cabinet body.

Description

Technical Field

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

[0002] Currently, environmentally friendly gas-insulated ring main unit (RMU) is a type of environmentally friendly gas-insulated metal-enclosed switchgear used for power transmission and distribution. The cabinet of the environmentally friendly gas-insulated metal-enclosed switchgear is equipped with a primary circuit insulation chamber, which houses electrical components and is filled with environmentally friendly gas as an insulating medium to ensure safe power transmission and distribution. The insulation chamber is generally equipped with a pressure relief device, typically a bursting disc. When an arcing fault occurs in the insulation chamber, the expansion pressure of the insulating medium increases. When the bursting pressure is reached, the bursting disc ruptures, releasing high-temperature, high-pressure gas.

[0003] In the above-mentioned existing technical solutions, when the traditional environmentally friendly gas fully insulated metal-enclosed switchgear is in use, when the electrical components encounter unexpected situations such as aging, failure, sealing failure, poor heat dissipation, etc., the insulation chamber is prone to abnormal temperature rise, causing the environmentally friendly gas to expand, but not reaching the critical value for the rupture of the bursting disc, so that the gas expansion can easily cause the cabinet of the insulation chamber to deform, affecting the sealing and structural safety of the insulation chamber, and affecting the subsequent use of the cabinet. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. According to an embodiment of the present application, an environmentally friendly gas insulated ring main unit comprises a cabinet body, a cooling component and an air pressure balancing component;

[0005] The cabinet comprises an outer shell and an inner lining box, wherein an insulating chamber is provided in the inner lining box, and an isolation cavity is provided between the outer wall of the inner lining box and the inner wall of the outer shell;

[0006] The cooling assembly includes a heat pipe, a circulation pump, and a container. The heat pipe is arranged in the insulating chamber. The liquid extraction end of the circulation pump is connected to the liquid outlet of the container. The liquid outlet end of the circulation pump is connected to one end of the heat pipe, and the other end of the heat pipe is connected to the liquid inlet of the container.

[0007] The air pressure balancing assembly includes a piston cylinder, a piston and a spring. The side wall of the liner box is provided with a connecting port connected to the piston cylinder. The piston is movably arranged in the piston cylinder. A support block is installed in the piston cylinder through a supporting structure. The lower end of the spring is connected to the support block, and the upper end of the spring is connected to the piston.

[0008] According to the environmentally friendly gas-insulated ring main unit of the present application, the heat pipe is provided to absorb excess heat in the liner box. The coolant in the container is pumped by a circulating pump and circulated in the heat pipe, so that the liner box takes away the heat in the heat pipe, avoiding poor heat dissipation, which would cause gas expansion and increase in internal pressure. At the same time, it also avoids damage to components caused by excessive internal temperature.

[0009] When the temperature cannot be lowered in time, the environmental protection gas expands and the internal pressure increases. Since the insulation chamber is connected to the piston cylinder, the pressure in the piston cylinder increases synchronously. The increased gas pressure will push the piston to slide, causing the piston to push the spring to compress, which plays a role in reducing and stabilizing the pressure, so that the pressure in the insulation chamber remains stable, avoiding deformation of the insulation chamber cabinet due to gas expansion, affecting the sealing and structural safety of the insulation chamber. At the same time, when an arc fault occurs due to improper inflation, operational errors, etc., it can also buffer the impact of the instantaneous pressure increase caused by the explosion, play a protective role for the cabinet, and avoid affecting the subsequent use of the cabinet.

[0010] In addition, the environmentally friendly gas insulated ring main unit according to the embodiment of the present application also has the following additional technical features:

[0011] In a preferred embodiment of the present invention, the heat pipe is connected to a heat conducting sheet, a plurality of heat conducting sheets are provided in an array, and the heat conducting sheets are provided on the top of the insulating chamber.

[0012] In a preferred embodiment of the present invention, the container is fixed in the isolation cavity, the container is filled with cooling liquid, the outer wall of the container is connected with a heat sink, and the heat sink extends to the surface of the shell.

[0013] In a preferred embodiment of the present invention, the communication port is communicated with the upper end of the piston cylinder, the liquid inlet of the container is arranged at the top, and the liquid outlet of the container is arranged at the bottom.

[0014] In a preferred embodiment of the present invention, the circulation pump is fixed on one side of the container, and a bellows is connected between the liquid extraction end of the circulation pump and the liquid outlet of the container.

[0015] In a preferred embodiment of the present invention, a waterproof junction box is embedded in the housing, the waterproof junction box is provided with waterproof connection terminals, and the waterproof junction box is provided with a wire threading hole communicating with the insulating chamber.

[0016] In a preferred embodiment of the present invention, a base is fixed to the bottom of the cabinet, a mounting hole is provided on the surface of the base, a cabinet door is installed on the front of the cabinet, a sealing gasket is provided at the edge of the inner wall of the cabinet door, and the sealing gasket is in sealing contact with the cabinet.

[0017] In a preferred embodiment of the present invention, a top cover is installed on the top of the cabinet body, an audible and visual alarm is installed on the top cover, and a control panel and a display are embedded on the surface of the cabinet door.

[0018] In a preferred embodiment of the present invention, the cross-section of the piston cylinder is a flat ellipse, the piston is provided as a flat ellipsoid matching the inner wall of the piston cylinder, and the outer surface of the piston is in sealing contact with the inner surface of the piston cylinder.

[0019] In a preferred embodiment of the present invention, the piston is provided with a guide hole, a guide rod is slidably inserted into the guide hole, and an end portion of the guide rod is fixedly connected to the piston cylinder.

[0020] The spring has a limited amount of expansion and can only be effective for the expansion of a small amount of gas. When there is too much expanding gas, the compression limit of the spring will be reached, resulting in the inability to play a protective role. For this reason, the following is a specific implementation plan of the environmentally friendly gas insulated ring network cabinet according to this application with reference to the accompanying drawings:

[0021] In a preferred embodiment of the present invention, a support structure is built into the piston cylinder for adjusting the position of the support block, and a temperature sensor and a pressure sensor are installed in the insulating chamber.

[0022] In a preferred embodiment of the present invention, the support structure includes a telescopic part, the movable end of the telescopic part is connected to the support block, the support block is fixed with a limiting rod, the surface of the limiting rod is connected to a limiting sleeve A and a limiting sleeve B, the piston is provided with a limiting hole, the limiting rod slides through the limiting hole, the limiting sleeve A is arranged at the upper end of the piston, and the limiting sleeve B is arranged at the lower end of the piston.

[0023] The support structure built into the piston cylinder has a telescopic function, which is used to adjust the position of the support block. When there is too much expansion gas, the support block is driven downward, so that the internal space connecting the piston cylinder and the insulating chamber is increased to accommodate more expansion gas and avoid exceeding the elastic limit of the spring;

[0024] The insulation chamber is equipped with a temperature sensor and a pressure sensor to detect changes in internal temperature and pressure in real time. When changes are detected, the telescopic member is driven to adjust its extension and contraction to adapt to the pressure change, so that the pressure in the insulation chamber is within the specified range.

[0025] When a gas leak occurs in the cabinet, the piston is pulled to reduce the pressure in the insulation chamber to the outside atmospheric pressure. The outside air is introduced inward through the leak port, so that the gas does not leak out. The alarm is triggered and repairs are carried out in a short time to prevent the internal gas from leaking out and polluting the environment.

[0026] By adding a limit sleeve B, the compression limit of the piston cylinder compression spring is set to protect the spring and extend the service life of the spring.

[0027] The limit sleeve A is provided to limit the elongation limit of the piston tension spring to avoid damage to the spring due to excessive stretching.

[0028] In a preferred embodiment of the present invention, the telescopic part includes one of a hydraulic cylinder, an electric push rod or a pneumatic cylinder, a first sealing ring is clamped in the limiting hole, the first sealing ring is in sealing contact with the outer surface of the limiting rod, a second sealing ring is clamped in the inner wall of the guide hole, the second sealing ring is in sealing contact with the outer wall of the guide rod, and the guide rod is arranged parallel to the limiting rod.

[0029] In a preferred embodiment of the present invention, the limiting sleeve A and the limiting sleeve B are threaded sleeves, an external thread is provided on the outer surface of the limiting rod, and the limiting sleeve A and the limiting sleeve B are threadedly connected to the external thread.

[0030] In a preferred embodiment of the present invention, the limiting sleeve A and the limiting sleeve B are retaining springs, and a retaining groove for engaging with the retaining spring is provided on the surface of the limiting rod.

[0031] In a preferred embodiment of the present invention, a controller is installed in the isolation chamber, the telescopic part is an electric push rod, the electric control input end of the electric push rod is electrically connected to the end control output end of the controller, and the temperature sensor and the pressure sensor are respectively connected to the signal input end of the control by wires.

[0032] The electrical components in the existing environmental protection cabinet will generate arcs when disconnected. The arcs not only release heat and increase the temperature, but also produce harmful gases. The harmful gases cannot be removed in the insulation room, which poses a safety hazard during inspection and maintenance. Moreover, after opening for maintenance, dust will enter the interior and be distributed in the built-in insulating gas, which is difficult to remove. Therefore, the following is a specific implementation plan of the environmental protection gas insulated ring network cabinet according to the present application with reference to the accompanying drawings:

[0033] In a preferred embodiment of the present invention, a filter assembly is installed at the communication port for filtering and purifying the gas passing through the communication port.

[0034] In a preferred embodiment of the present invention, the filter assembly includes a filter box, a filter plate and an exhaust fan, a raised docking end is provided on one side of the filter box, the docking end is sealed and docked with the connecting port, the docking end is provided with an air inlet and an air outlet, the air inlet is equipped with a one-way air inlet valve, the air outlet is equipped with a one-way exhaust valve A, the exhaust end of the exhaust fan is connected to a conduit, the upper end of the conduit is connected to the one-way exhaust valve A, the exhaust end of the exhaust fan is provided at the bottom of the insulating chamber, and the filter plate is clamped at the bottom of the filter box.

[0035] A raised docking end is provided on one side of the filter box, which is sealed and docked with the connecting port to facilitate the disassembly and assembly of the filter box. Since the air inlet of the docking end is equipped with a one-way air inlet valve and the air outlet of the docking end is equipped with a one-way exhaust valve A; when in use, when the pressure in the insulating room increases, the air flow in the insulating room will enter from the air inlet provided at the docking end, diffuse into the piston cylinder through the filter plate, and when the pressure in the insulating room decreases, the gas in the piston cylinder will enter the air outlet bin after being filtered through the filter plate, and will be introduced into the insulating room from the air outlet of the docking end, so that the function of automatic gas filtering is realized in the process of controlling and balancing the pressure inside the insulating room, which can remove the insulating gas Dust and harmful gases mixed in the body; a harmful gas concentration sensor is built into the insulation room. When it is detected that the concentration of harmful gases reaches a preset value, the exhaust fan is controlled to extract the gas inside the duct, so that the gas in the piston cylinder connected to the air outlet bin and the gas in the insulation room circulate, realizing the circulation filtration of the entire insulation gas and achieving the effect of removing harmful gases; the filter plate is connected to the bottom of the filter box, which is convenient for disassembly and replacement of new filter plates, reducing maintenance costs; the harmful gases generated by the arc are effectively removed from the insulation room, eliminating safety hazards during inspection and maintenance, and cleaning the dust that enters the room.

[0036] In a preferred embodiment of the present invention, an air inlet bin and an air outlet bin are provided inside the filter box, the air inlet bin and the air outlet bin are sealed and separated by a partition, the one-way air inlet valve is installed at the air inlet of the air inlet bin, and the one-way exhaust valve A is installed at the air outlet of the air outlet bin;

[0037] The air outlet of the air inlet bin is arranged at the bottom of the filter box, the air inlet of the air outlet bin is arranged at the bottom of the filter box, and the filter plate seals and covers the air outlet of the air inlet bin and the air inlet surface of the air outlet bin.

[0038] In a preferred embodiment of the present invention, a one-way exhaust valve B is connected in series between the lower end of the conduit and the exhaust port of the exhaust fan via a three-way pipe.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 This is a schematic diagram of the three-dimensional structure of an environmentally friendly gas insulated ring main unit provided in an embodiment of the present application;

[0042] Figure 2 A schematic diagram of the internal structure of a partially cutaway cabinet provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of the exploded three-dimensional structure of the cabinet provided in an embodiment of the present application;

[0044] Figure 4 A schematic diagram of the three-dimensional structure of a piston provided in an embodiment of the present application;

[0045] Figure 5 A schematic diagram of the three-dimensional structure of the filter assembly provided in an embodiment of the present application;

[0046] Figure 6 A schematic diagram of the exploded three-dimensional structure of the filter assembly provided in an embodiment of the present application;

[0047] Figure 7 This is a schematic diagram of the cross-sectional structure of the filter box provided in an embodiment of the present application.

[0048] In the figure: 100, cabinet body; 101, base; 103, cabinet door; 110, outer shell; 111, waterproof junction box; 130, lining box; 131, connecting port; 300, cooling assembly; 310, heat pipe; 311, heat conducting sheet; 330, circulating pump; 331, bellows; 350, container; 500, air pressure balance assembly; 510, piston cylinder; 530, piston; 531, limit hole ; 532, guide hole; 533, guide rod; 550, spring; 570, support block; 571, limit rod; 572, limit sleeve A; 573, limit sleeve B; 590, telescopic part; 700, filter assembly; 710, filter box; 711, one-way air inlet valve; 713, one-way exhaust valve A; 730, filter plate; 750, exhaust fan; 751, duct; 753, one-way exhaust valve B. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0051] The following describes an environmentally friendly gas insulated ring main unit according to an embodiment of the present application with reference to the accompanying drawings;

[0052] like Figure 1-Figure 7 As shown, the environmentally friendly gas insulated ring main unit according to an embodiment of the present application includes a cabinet body 100, a cooling component 300 and an air pressure balancing component 500;

[0053] The cabinet 100 includes an outer shell 110 and an inner lining box 130 , wherein an insulating chamber is provided in the inner lining box 130 , and an isolation cavity is provided between the outer wall of the inner lining box 130 and the inner wall of the outer shell 110 ;

[0054] The cooling assembly 300 includes a heat pipe 310, a circulation pump 330, and a container 350. The heat pipe 310 is disposed in the insulating chamber. The liquid extraction end of the circulation pump 330 is connected to the liquid outlet of the container 350. The liquid outlet of the circulation pump 330 is connected to one end of the heat pipe 310, and the other end of the heat pipe 310 is connected to the liquid inlet of the container 350.

[0055] The air pressure balancing assembly 500 includes a piston cylinder 510, a piston 530 and a spring 550. The side wall of the liner box 130 is provided with a connecting port 131 connected to the piston cylinder 510. The piston 530 is movably arranged in the piston cylinder 510. A support block 570 is installed in the piston cylinder 510 through a supporting structure. The lower end of the spring 550 is connected to the support block 570, and the upper end of the spring 550 is connected to the piston 530.

[0056] According to the environmentally friendly gas-insulated ring main unit of the present application, the heat pipe 310 is provided to absorb excess heat in the liner box 130. The coolant in the container 350 is extracted by the circulation pump 330 and circulated in the heat pipe 310, so that the liner box 130 removes the heat in the heat pipe 310, thereby avoiding poor heat dissipation, which would cause gas expansion and increase in internal pressure. At the same time, it also prevents damage to components caused by excessive internal temperature.

[0057] When the temperature cannot be lowered in time, the environmental protection gas expands and the internal pressure increases. Since the insulating chamber is connected to the piston cylinder 510, the pressure in the piston cylinder 510 increases synchronously. The increased gas pressure will push the piston 530 to slide, causing the piston 530 to push the spring 550 to compress, playing the role of reducing and stabilizing the pressure, so that the pressure in the insulating chamber remains stable, avoiding deformation of the cabinet 100 of the insulating chamber due to gas expansion, affecting the sealing and structural safety of the insulating chamber, and at the same time, when an arc fault occurs due to improper inflation, operational errors, etc., it can also buffer the impact caused by the instantaneous pressure increase caused by the explosion, play a protective role for the cabinet 100, and avoid affecting the subsequent use of the cabinet 100.

[0058] In addition, the environmentally friendly gas insulated ring main unit according to the embodiment of the present application also has the following additional technical features:

[0059] In a specific embodiment of the present invention, the heat pipe 310 is connected to a heat conducting sheet 311 , a plurality of heat conducting sheets 311 are arranged in an array, and the heat conducting sheets 311 are arranged on the top of the insulation chamber.

[0060] In a specific embodiment of the present invention, the container 350 is fixed in the isolation cavity, the container 350 is filled with coolant, the outer wall of the container 350 is connected with a heat sink, and the heat sink extends to the surface of the shell 110.

[0061] In a specific embodiment of the present invention, the communication port 131 is communicated with the upper end of the piston cylinder 510 , the liquid inlet of the container 350 is arranged at the top, and the liquid outlet of the container 350 is arranged at the bottom.

[0062] In a specific embodiment of the present invention, the circulation pump 330 is fixed to one side of the container 350 , and a bellows 331 is connected between the liquid pumping end of the circulation pump 330 and the liquid outlet of the container 350 .

[0063] In a specific embodiment of the present invention, the housing 110 is embedded with a waterproof junction box 111 , the waterproof junction box 111 is provided with waterproof connection terminals, and the waterproof junction box 111 is provided with a wire threading hole communicating with the insulating chamber.

[0064] In a specific embodiment of the present invention, a base 101 is fixed to the bottom of the cabinet 100, and a mounting hole is opened on the surface of the base 101. A cabinet door 103 is installed on the front of the cabinet 100, and a sealing gasket is provided at the edge of the inner wall of the cabinet door 103, and the sealing gasket is in sealing contact with the cabinet 100.

[0065] In a specific embodiment of the present invention, a top cover is installed on the top of the cabinet 100 , an audible and visual alarm is installed on the top cover, and a control panel and a display are embedded on the surface of the cabinet door 103 .

[0066] In a specific embodiment of the present invention, the cross-section of the piston cylinder 510 is a flat ellipse, the piston 530 is a flat ellipse that matches the inner wall of the piston cylinder 510 , and the outer surface of the piston 530 is in sealing contact with the inner surface of the piston cylinder 510 .

[0067] In a specific embodiment of the present invention, the piston 530 is provided with a guide hole 532 , a guide rod 533 is slidably inserted into the guide hole 532 , and an end of the guide rod 533 is fixedly connected to the piston cylinder 510 .

[0068] The expansion and contraction of the spring 550 is limited, and it can only be effective for the expansion of a small amount of gas. When the expanding gas is too much, the compression limit of the spring 550 will be reached, resulting in the inability to play a protective role. For this reason, the specific implementation plan of the environmentally friendly gas insulated ring network cabinet according to this application is shown below with reference to the accompanying drawings:

[0069] Specifically, if Figure 2-Figure 4 As shown, in a specific embodiment of the present invention, a support structure is built into the piston cylinder 510 for adjusting the position of the support block 570, and a temperature sensor and a pressure sensor are installed in the insulating chamber.

[0070] In a specific embodiment of the present invention, the support structure includes a telescopic member 590, the movable end of the telescopic member 590 is connected to the support block 570, the support block 570 is fixed with a limiting rod 571, the surface of the limiting rod 571 is connected to a limiting sleeve A572 and a limiting sleeve B573, the piston 530 is provided with a limiting hole 531, the limiting rod 571 slides through the limiting hole 531, the limiting sleeve A572 is arranged at the upper end of the piston 530, and the limiting sleeve B573 is arranged at the lower end of the piston 530.

[0071] The support structure built into the piston cylinder 510 has a telescopic function for adjusting the position of the support block 570. When there is too much inflation gas, the support block 570 is driven downward, thereby increasing the internal space connecting the piston cylinder 510 and the insulating chamber to accommodate more inflation gas and prevent the elastic limit of the spring 550 from being exceeded.

[0072] A temperature sensor and a pressure sensor are installed in the insulation chamber to detect changes in internal temperature and pressure in real time. When a change is detected, the telescopic member 590 is driven to adjust its extension and contraction to adapt to the pressure change, so that the pressure in the insulation chamber is within the specified range.

[0073] When a gas leak occurs in the cabinet 100, the piston 530 is pulled to reduce the pressure inside the insulation chamber to the outside atmospheric pressure. The outside air is introduced inward through the leak port, so that the gas does not leak out. The alarm is triggered and repairs are carried out in a short time to prevent the internal gas from leaking out and polluting the environment.

[0074] By adding a limit sleeve B573, the compression limit of the piston cylinder 510 is set to the spring 550, thereby protecting the spring 550 and extending the service life of the spring 550.

[0075] The limiting sleeve A572 is provided to limit the elongation limit of the piston 530 stretching the spring 550 to avoid damage to the spring 550 due to excessive stretching.

[0076] In a specific embodiment of the present invention, the telescopic member 590 includes one of a hydraulic cylinder, an electric push rod or a pneumatic cylinder, a first sealing ring is clamped in the limiting hole 531, and the first sealing ring is in sealing contact with the outer surface of the limiting rod 571, and a second sealing ring is clamped in the inner wall of the guide hole 532, and the second sealing ring is in sealing contact with the outer wall of the guide rod 533, and the guide rod 533 is arranged parallel to the limiting rod 571.

[0077] In a specific embodiment of the present invention, the limiting sleeve A572 and the limiting sleeve B573 are threaded sleeves, the outer surface of the limiting rod 571 is provided with an external thread, and the limiting sleeve A572 and the limiting sleeve B573 are threadedly connected with the external thread.

[0078] In a specific embodiment of the present invention, the limiting sleeve A572 and the limiting sleeve B573 are retaining springs, and a groove for engaging with the retaining spring is provided on the surface of the limiting rod 571 .

[0079] In a specific embodiment of the present invention, a controller is installed in the isolation chamber, the telescopic part 590 is an electric push rod, the electric control input end of the electric push rod is electrically connected to the end control output end of the controller, and the temperature sensor and the pressure sensor are respectively connected to the signal input end of the control by wires.

[0080] The electrical components in the existing environmental protection cabinet will generate arcs when disconnected. The arcs not only release heat and increase the temperature, but also produce harmful gases. The harmful gases cannot be removed in the insulation room, which poses a safety hazard during inspection and maintenance. Moreover, after opening for maintenance, dust will enter the interior and be distributed in the built-in insulating gas, which is difficult to remove. Therefore, the following is a specific implementation plan of the environmental protection gas insulated ring network cabinet according to the present application with reference to the accompanying drawings:

[0081] Specifically, if Figure 3-Figure 7As shown, in a specific embodiment of the present invention, a filter assembly 700 is installed at the communication port 131 for filtering and purifying the gas passing through the communication port 131 .

[0082] In a specific embodiment of the present invention, the filter assembly 700 includes a filter box 710, a filter plate 730 and an exhaust fan 750. A raised docking end is provided on one side of the filter box 710, and the docking end is sealed and docked with the connecting port 131. The docking end is provided with an air inlet and an air outlet. The air inlet is equipped with a one-way air inlet valve 711, and the air outlet is equipped with a one-way exhaust valve A713. The exhaust end of the exhaust fan 750 is connected to a conduit 751, and the upper end of the conduit 751 is connected to the one-way exhaust valve A713. The exhaust end of the exhaust fan 750 is provided at the bottom of the insulating chamber, and the filter plate 730 is clamped at the bottom of the filter box 710.

[0083] A raised docking end is provided on one side of the filter box 710, which is sealed and docked with the connecting port 131, so as to facilitate the disassembly and assembly of the filter box 710. Since the air inlet of the docking end is installed with a one-way air inlet valve 711, and the air outlet of the docking end is installed with a one-way exhaust valve A713; when in use, when the pressure in the insulating chamber increases, the air flow in the insulating chamber will enter from the air inlet provided at the docking end, diffuse into the piston cylinder 510 through the filter plate 730, and when the pressure in the insulating chamber decreases, the gas in the piston cylinder 510 enters the air outlet bin after being filtered through the filter plate 730, and is introduced into the insulating chamber from the air outlet of the docking end, so that the function of automatically filtering the gas is realized in the process of controlling and balancing the pressure inside the insulating chamber, which can Remove dust and harmful gases mixed in the insulating gas; a harmful gas concentration sensor is installed in the insulating room. When it is detected that the harmful gas concentration reaches a preset value, the exhaust fan 750 is controlled to extract the gas inside the duct 751, so that the gas in the piston cylinder 510 connected to the air outlet bin and the gas in the insulating room circulate, realizing the circulation filtration of the entire insulating gas, and achieving the effect of removing harmful gases; the filter plate 730 is snapped onto the bottom of the filter box 710, which is convenient for disassembly and replacement of the new filter plate 730, reducing maintenance costs; the harmful gases generated by the arc are effectively removed from the insulating room, eliminating safety hazards during inspection and maintenance, and cleaning the dust that enters the room.

[0084] The filter element of the filter plate 730 for filtering harmful gases includes one or more of the following combinations:

[0085] HEPA filter: Mainly used to filter particles in the air, effective for most fine particles (such as dust, pollen, smoke, etc.).

[0086] Activated carbon filter: effectively removes volatile organic compounds (VOCs), odors, smells and other harmful gases in the air through physical adsorption and chemical adsorption.

[0087] Catalytic filter element: Through chemical reactions, it can convert and remove certain harmful gases in the air, such as formaldehyde, benzene, ammonia, etc.

[0088] EPA filter element: It is a more efficient air filter that can filter smaller particles and is suitable for environments with higher requirements for air quality.

[0089] Alkaline filter element: Filters specific acidic gases (such as sulfur dioxide, chlorine, etc.).

[0090] Photocatalytic filter element: Using photocatalytic technology to decompose harmful gases, it can effectively remove formaldehyde, bacteria, viruses, etc.

[0091] In a specific embodiment of the present invention, an air inlet chamber and an air outlet chamber are provided inside the filter box 710, and the air inlet chamber and the air outlet chamber are sealed and separated by a partition. The one-way air inlet valve 711 is installed at the air inlet of the air inlet chamber, and the one-way exhaust valve A713 is installed at the air outlet of the air outlet chamber;

[0092] The air outlet of the air inlet bin is arranged at the bottom of the filter box 710, the air inlet of the air outlet bin is arranged at the bottom of the filter box 710, and the filter plate 730 seals and covers the air outlet of the air inlet bin and the air inlet surface of the air outlet bin.

[0093] In a specific embodiment of the present invention, a one-way exhaust valve B753 is connected in series between the lower end of the conduit 751 and the exhaust port of the exhaust fan 750 through a three-way pipe.

[0094] Other structures and operations of the electric push rod, exhaust fan 750 and various sensors according to the embodiment of the present application are well known to ordinary technicians in this field and will not be described in detail here.

[0095] The foregoing is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

Claims

1. An environmentally friendly gas insulated ring main unit, characterized in that: include A cabinet (100), the cabinet (100) comprising an outer shell (110) and an inner lining box (130), an insulating chamber being provided in the inner lining box (130), and an isolation cavity being provided between an outer wall of the inner lining box (130) and an inner wall of the outer shell (110); A cooling component (300), the cooling component (300) comprising a heat conducting pipe (310), a circulation pump (330) and a container (350), the heat conducting pipe (310) being arranged in the insulating chamber, the liquid extraction end of the circulation pump (330) being connected to the liquid outlet of the container (350), the liquid outlet end of the circulation pump (330) being connected to one end of the heat conducting pipe (310), and the other end of the heat conducting pipe (310) being connected to the liquid inlet of the container (350); An air pressure balancing assembly (500) includes a piston cylinder (510), a piston (530), and a spring (550); a communication port (131) communicating with the piston cylinder (510) is provided on a side wall of the liner box (130); the piston (530) is movably arranged in the piston cylinder (510); a support block (570) is installed in the piston cylinder (510) via a support structure; the lower end of the spring (550) is connected to the support block (570), and the upper end of the spring (550) is connected to the piston (530); A filter assembly (700) is installed at the communication port (131) for filtering and purifying gas passing through the communication port (131); the filter assembly (700) comprises a filter box (710), a filter plate (730) and an exhaust fan (750); a raised docking end is provided on one side of the filter box (710), the docking end is sealed and docked with the communication port (131), an air inlet and an air outlet are provided at the docking end; a one-way air inlet valve (711) is installed at the air inlet, and a one-way exhaust valve A (713) is installed at the air outlet; the exhaust end of the exhaust fan (750) is connected to a conduit (751), the upper end of the conduit (751) is connected to the one-way exhaust valve A (713); the exhaust end of the exhaust fan (750) is provided at the bottom of the insulation chamber, and the filter plate (730) is snap-fitted to the bottom of the filter box (710).

2. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The heat conducting pipe (310) is connected to a heat conducting sheet (311), a plurality of heat conducting sheets (311) are arranged in an array, and the heat conducting sheets (311) are arranged on the top of the insulation chamber.

3. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The container (350) is fixed in the isolation cavity, the container (350) is filled with cooling liquid, and the outer wall of the container (350) is connected with a heat sink, which extends to the surface of the shell (110).

4. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The communication port (131) is in communication with the upper end of the piston cylinder (510), the liquid inlet of the container (350) is arranged at the top, and the liquid outlet of the container (350) is arranged at the bottom.

5. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The circulation pump (330) is fixed on one side of the container (350), and a bellows (331) is connected between the liquid extraction end of the circulation pump (330) and the liquid outlet of the container (350).

6. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The housing (110) is embedded with a waterproof junction box (111), the waterproof junction box (111) is provided with waterproof connection terminals, and the waterproof junction box (111) is provided with a wire threading hole communicating with the insulating chamber.

7. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: A base (101) is fixed to the bottom of the cabinet (100), and a mounting hole is provided on the surface of the base (101). A cabinet door (103) is installed on the front of the cabinet (100), and a sealing gasket is provided at the edge of the inner wall of the cabinet door (103), and the sealing gasket is in sealing contact with the cabinet (100).

8. The environmentally friendly gas insulated ring main unit according to claim 7, characterized in that: A top cover is installed on the top of the cabinet body (100), an audible and visual alarm is installed on the top cover, and a control panel and a display are embedded on the surface of the cabinet door (103).

9. The environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The cross section of the piston cylinder (510) is a flat ellipse, the piston (530) is provided with a flat ellipse that matches the inner wall of the piston cylinder (510), and the outer surface of the piston (530) is in sealing contact with the inner surface of the piston cylinder (510).

10. The environmentally friendly gas insulated ring main unit according to claim 9, characterized in that: The piston (530) is provided with a guide hole (532), a guide rod (533) is slidably inserted into the guide hole (532), and the end of the guide rod (533) is fixedly connected to the piston cylinder (510).

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