Environment-friendly gas insulation ring main unit

Abstract

The embodiment of the invention provides an environment-friendly gas insulation ring main unit, and relates to the technical field of ring main units. The environment-friendly gas insulation ring main unit comprises a cabinet body, a cooling assembly and an air pressure balance assembly. An insulating chamber is arranged in the lining box; the liquid outlet end of the circulating pump is connected with one end of the heat conduction pipe, and the other end of the heat conduction pipe is connected with the liquid inlet of the container; a supporting block is installed in the piston cylinder through a supporting structure, the lower end of the spring is connected with the supporting block, and the upper end of the spring is connected with the piston. The pressure reducing and stabilizing device plays a role in reducing and stabilizing the pressure in the insulation chamber, so that the pressure in the insulation chamber is kept stable, the phenomena that the cabinet body of the insulation chamber is deformed due to gas expansion and the sealing and the structural safety of the insulation chamber are influenced are avoided, and meanwhile, when arcing faults such as improper inflation and misoperation occur, the impact generated by instantaneous pressure increase generated by detonation can be buffered, and the service life of the insulation chamber is prolonged. Therefore, the cabinet body is protected, and subsequent use of the cabinet body is prevented from being affected.

Description

Technical Field

[0001] This application relates to the field of ring main units, and more particularly to an environmentally friendly gas-insulated ring main unit. Background Art

[0002] At present, an environmentally friendly gas-insulated ring main unit is an environmentally friendly gas fully insulated metal-enclosed switchgear used for power system transmission and distribution. Inside the cabinet of the environmentally friendly gas fully insulated metal-enclosed switchgear, there is a primary circuit insulation chamber. Electrical components are arranged inside the insulation chamber, and an environmentally friendly gas serving as an insulating medium is filled to ensure the safe transmission and distribution of the power system. The insulation chamber is generally provided with a pressure relief device. The existing pressure relief device is usually a rupture disc. When an arc fault occurs inside the insulation chamber, the insulating medium expands and the pressure increases. When the rupture pressure is reached, the rupture disc breaks to release high-temperature and high-pressure gas;

[0003] In the above prior art solutions, during the use of traditional environmentally friendly gas fully insulated metal-enclosed switchgear, when unexpected situations such as aging, failure, seal failure, and poor heat dissipation of electrical components occur, 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 disc to break, resulting in the deformation of the cabinet body of the insulation chamber due to gas expansion, affecting the sealing and structural safety of the insulation chamber and the subsequent use of the cabinet body. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. The environmentally friendly gas-insulated ring main unit according to an embodiment of this application includes a cabinet body, a cooling component, and a pressure balance component;

[0005] The cabinet body includes an outer shell and an inner lining box. An insulation chamber is arranged inside the inner lining box, and an isolation chamber is arranged between the outer wall of the inner lining box and the inner wall of the outer shell;

[0006] The cooling component includes a heat conduction pipe, a circulation pump, and a container. The heat conduction pipe is arranged inside the insulation chamber. The liquid suction end of the circulation pump is communicated with the liquid outlet of the container, the liquid outlet end of the circulation pump is connected to one end of the heat conduction pipe, and the other end of the heat conduction pipe is connected to the liquid inlet of the container;

[0007] The pressure balance component includes a piston cylinder, a piston, and a spring. A communication port communicating with the piston cylinder is opened on the side wall of the inner lining box. The piston is movably arranged inside the piston cylinder. A support block is installed inside 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.

[0008] For the environmentally friendly gas-insulated ring main unit according to the embodiments of the present application, the provided heat conduction tube absorbs excessive heat in the inner lining box. The circulating pump extracts the coolant in the container and circulates it in the heat conduction tube, so that the inner lining box takes away the heat in the heat conduction tube, avoiding gas expansion and increased internal pressure caused by poor heat dissipation. At the same time, it also avoids damage to components caused by too high internal temperature.

[0009] In the case where the temperature cannot be reduced in time and the environmentally friendly gas expands, resulting in an increase in internal pressure, since the insulation chamber is communicated with the piston cylinder, the pressure in the piston cylinder increases synchronously. The increased air pressure will push the piston to slide, causing the piston to compress the spring, playing a role in reducing and stabilizing the pressure, so that the pressure in the insulation chamber remains stable, avoiding deformation of the cabinet body of the insulation chamber caused by gas expansion, affecting the sealing and structural safety of the insulation chamber. At the same time, when arc faults occur due to improper gas filling, operation errors, etc., it can also buffer the impact caused by the instantaneous pressure increase generated by the deflagration, playing a protective role for the cabinet body and avoiding affecting the subsequent use of the cabinet body.

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

[0011] In a preferred embodiment of the present invention, the heat conduction tube is connected with heat conduction fins, a plurality of the heat conduction fins are arranged in an array, and the heat conduction fins are arranged on the top of the insulation chamber.

[0012] In a preferred embodiment of the present invention, the container is fixed in the isolation cavity, the container is filled with coolant, the outer wall of the container is connected with heat dissipation fins, and the heat dissipation fins extend to the surface of the outer 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 circulating pump is fixed on one side of the container, and a corrugated pipe is connected between the liquid extraction end of the circulating pump and the liquid outlet of the container.

[0015] In a preferred embodiment of the present invention, the outer shell is embedded with a waterproof junction box, the waterproof junction box is provided with waterproof terminal blocks, and the waterproof junction box is provided with a wire passing hole communicated with the insulation chamber.

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

[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 with a flat ellipsoid matching the inner wall of the piston cylinder, and the outer surface of the piston is in sealed contact with the inner surface of the piston cylinder.

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

[0020] The expansion amount of the spring is limited and can only have an effect on the expansion of a small part of the gas. When there is too much expanding gas, it will reach the compression limit of the spring, resulting in the inability to play a protective role. Therefore, the following is a specific implementation plan of the environmentally friendly gas-insulated ring main unit according to the present application with reference to the attached drawings:

[0021] In a preferred embodiment of the present invention, a support structure is arranged inside 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 member, the movable end of the telescopic member is connected to the support block, the support block is fixed with a limit rod, a limit sleeve A and a limit sleeve B are connected to the surface of the limit rod, a limit hole is opened in the piston, the limit rod slidably penetrates through the limit hole, the limit sleeve A is arranged above the piston, and the limit sleeve B is arranged below the piston.

[0023] The support structure arranged inside the piston cylinder has a telescopic function for adjusting the position of the support block. When there is too much expanding gas, by driving the support block to move downward, the internal space of the piston cylinder communicating with the insulating chamber is increased to accommodate more expanding gas, avoiding exceeding the elastic limit of the spring;

[0024] A temperature sensor and a pressure sensor are installed in the insulating chamber for real-time detection of internal temperature and pressure changes, and driving the telescopic member to perform telescopic adjustment at the first time when the changes are detected to adapt to the pressure change and keep the pressure in the insulating chamber within the specified range;

[0025] When there is a gas leakage in the cabinet body, by pulling the piston, the pressure in the insulating chamber is reduced, lower than the external atmospheric pressure, and external air is introduced inward through the leakage port, so that the gas will not leak outward, and alarm maintenance is carried out in a short time to avoid environmental pollution caused by external leakage of internal gas;

[0026] By adding a limit sleeve B, it is used to limit the compression limit of the compression spring in the piston cylinder, playing a protective role for the spring and extending the service life of the spring;

[0027] A limit sleeve A is provided to limit the elongation limit of the piston stretching spring, avoiding damage to the spring caused by excessive stretching.

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

[0029] In a preferred embodiment of the present invention, the limit sleeve A and the limit sleeve B are threaded sleeves. External threads are provided on the outer surface of the limit rod, and the limit sleeve A and the limit sleeve B are threadedly connected in cooperation with the external threads.

[0030] In a preferred embodiment of the present invention, the limit sleeve A and the limit sleeve B are snap rings, and clamping grooves for snap ring clamping are provided on the surface of the limit rod.

[0031] In a preferred embodiment of the present invention, a controller is installed in the isolation chamber. The telescopic member 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. The temperature sensor and the pressure sensor are respectively electrically connected to the signal input end of the controller by wires.

[0032] When the electrical components in the existing environmental protection cabinet are disconnected, electric arcs will be generated. The electric arcs not only release heat and cause the temperature to rise, but also generate harmful gases. The harmful gases cannot be removed in the insulation chamber, posing a safety hazard during maintenance. And after opening for maintenance, dust will enter the interior and be distributed in the built-in insulating gas, which is not easy to remove. Therefore, the following is a specific implementation plan of the environmentally friendly gas-insulated ring main unit according to the present application with reference to the drawings:

[0033] In a preferred embodiment of the present invention, a filtering component 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 filtering assembly includes a filtering box, a filtering plate, and an exhaust fan. A protruding docking end is provided on one side of the filtering box, and the docking end is hermetically docked with the communication port. The docking end is provided with an air inlet and an air outlet. A one-way air inlet valve is installed at the air inlet, and a one-way exhaust valve A is installed at the air outlet. The air extraction end of the exhaust fan is connected to a conduit, and the upper end of the conduit is connected to the one-way exhaust valve A. The exhaust end of the exhaust fan is arranged at the bottom of the insulation chamber, and the filtering plate is snap-fitted at the bottom of the filtering box.

[0035] A protruding docking end is provided on one side of the filtering box and is hermetically docked with the communication port, which facilitates the disassembly and assembly of the filtering box. Since a one-way air inlet valve is installed at the air inlet of the docking end and a one-way exhaust valve A is installed at the air outlet of the docking end; during use, when the pressure in the insulation chamber increases, the airflow in the insulation chamber will enter through the air inlet provided at the docking end and diffuse into the piston cylinder through the filtering plate. When the pressure in the insulation chamber decreases, the gas in the piston cylinder is filtered by the filtering plate and then enters the air outlet chamber and is introduced into the insulation chamber through the air outlet of the docking end, so that the function of automatically filtering gas is realized during the process of controlling and balancing the internal pressure of the insulation chamber, and the dust and harmful gases mixed in the insulation gas can be removed; a harmful gas concentration sensor is arranged in the insulation chamber. 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 conduit, so that the gas in the piston cylinder communicated with the air outlet chamber circulates with the gas in the insulation chamber, realizing the cyclic filtration of the overall insulation gas and achieving the effect of removing harmful gases; the filtering plate is snap-fitted at the bottom of the filtering box, which is convenient for disassembly and replacement of a new filtering plate, reducing the maintenance cost; the harmful gases generated by the arc are effectively removed in the insulation chamber, eliminating potential safety hazards during maintenance and repair, and cleaning the dust entering the interior.

[0036] In a preferred embodiment of the present invention, an air inlet chamber and an air outlet chamber are arranged inside the filtering box, and the air inlet chamber and the air outlet chamber are hermetically separated by a partition. The one-way air inlet valve is installed at the air inlet of the air inlet chamber, and the one-way exhaust valve A is installed at the air outlet of the air outlet chamber;

[0037] The air outlet of the air inlet chamber is arranged at the bottom of the filtering box, the air inlet of the air outlet chamber is arranged at the bottom of the filtering box, and the filtering plate hermetically covers the surfaces of the air outlet of the air inlet chamber and the air inlet of the air outlet chamber.

[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 air extraction port of the exhaust fan through a tee.

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

[0040] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

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

[0042] Figure 2 is a schematic diagram of the internal structure of a partially cut-open cabinet body provided by an embodiment of the present application;

[0043] Figure 3 is a schematic three-dimensional structure diagram of the disassembled cabinet body provided by an embodiment of the present application;

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

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

[0046] Figure 6 is a schematic three-dimensional structure diagram of the disassembled filter assembly provided by an embodiment of the present application;

[0047] Figure 7 is a schematic diagram of the cut-open structure of a filter box provided by 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, inner lining box; 131, communication port; 300, cooling component; 310, heat conduction tube; 311, heat conduction fin; 330, circulation pump; 331, corrugated tube; 350, container; 500, air pressure balance component; 510, piston cylinder; 530, piston; 531, limiting hole; 532, guiding hole; 533, guiding rod; 550, spring; 570, supporting block; 571, limiting rod; 572, limiting sleeve A; 573, limiting sleeve B; 590, telescopic member; 700, filter assembly; 710, filter box; 711, one-way intake valve; 713, one-way exhaust valve A; 730, filter plate; 750, exhaust fan; 751, conduit; 753, one-way exhaust valve B. Detailed Embodiments

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will, with reference to the accompanying drawings in the embodiments of the present invention, clearly and completely describe the technical solutions in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0050] The following will describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.

[0051] The following refers to the drawings to describe an environmentally friendly gas-insulated ring main unit according to an embodiment of the present application;

[0052] As Figures 1-7 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 a pressure balance component 500;

[0053] The cabinet body 100 includes a housing 110 and an inner lining box 130. An insulation chamber is provided inside the inner lining box 130, and an isolation chamber is provided between the outer wall of the inner lining box 130 and the inner wall of the housing 110;

[0054] The cooling component 300 includes a heat conduction pipe 310, a circulation pump 330, and a container 350. The heat conduction pipe 310 is arranged inside the insulation chamber. The liquid suction end of the circulation pump 330 communicates with the liquid outlet of the container 350. The liquid outlet end of the circulation pump 330 is connected to one end of the heat conduction pipe 310, and the other end of the heat conduction pipe 310 is connected to the liquid inlet of the container 350;

[0055] The pressure balance component 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 the side wall of the inner lining box 130. The piston 530 is movably arranged inside the piston cylinder 510. A support block 570 is installed inside the piston cylinder 510 through 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.

[0056] In the environmentally friendly gas-insulated ring main unit according to an embodiment of the present application, the provided heat conduction pipe 310 absorbs excessive heat inside the inner lining box 130. The circulation pump 330 extracts the coolant in the container 350 to circulate inside the heat conduction pipe 310, so that the inner lining box 130 takes away the heat inside the heat conduction pipe 310, avoiding gas expansion and increased internal pressure caused by poor heat dissipation; at the same time, it also avoids damage to components due to excessive internal temperature;

[0057] In the case where the temperature cannot be reduced in time, resulting in the expansion of the environmentally friendly gas and an increase in the internal pressure, since the insulating chamber is connected to the piston cylinder 510, the pressure in the piston cylinder 510 increases synchronously. The increased air pressure will push the piston 530 to slide, causing the piston 530 to push the spring 550 to compress, playing a role in reducing and stabilizing the pressure, keeping the pressure in the insulating chamber stable, avoiding the deformation of the cabinet body 100 of the insulating chamber caused by gas expansion, affecting the sealing and structural safety of the insulating chamber. At the same time, when an arc fault occurs due to improper gas filling, operation errors, etc., it can also buffer the impact caused by the instantaneous pressure increase generated by the deflagration, playing a protective role for the cabinet body 100 and avoiding affecting the subsequent use of the cabinet body 100.

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

[0059] In a specific embodiment of the present invention, the heat conduction tube 310 is connected with heat conduction fins 311. A plurality of heat conduction fins 311 are arranged in an array, and the heat conduction fins 311 are arranged on the top of the insulating 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 a coolant. The outer wall of the container 350 is connected with heat dissipation fins, and the heat dissipation fins extend to the surface of the outer shell 110.

[0061] In a specific embodiment of the present invention, the communication port 131 is connected to 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 on one side of the container 350. A corrugated pipe 331 is connected between the liquid extraction end of the circulation pump 330 and the liquid outlet of the container 350.

[0063] In a specific embodiment of the present invention, the outer shell 110 is embedded with a waterproof junction box 111. The waterproof junction box 111 is provided with waterproof terminal blocks, and the waterproof junction box 111 is provided with a wire passing hole communicating with the insulating chamber.

[0064] In a specific embodiment of the present invention, a base 101 is fixed at the bottom of the cabinet body 100. Installation holes are formed on the surface of the base 101. A cabinet door 103 is installed on the front of the cabinet body 100. A sealing gasket is arranged at the edge of the inner wall of the cabinet door 103, and the sealing gasket is in sealing contact with the cabinet body 100.

[0065] In a specific embodiment of the present invention, a top cover is installed on the top of the cabinet body 100. An audible and visual alarm is installed on the top cover. 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 provided with a flat ellipsoid matching 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 the end of the guide rod 533 is fixedly connected to the piston cylinder 510.

[0068] The expansion amount of the spring 550 is limited and can only have an effect on the expansion of a small part of the gas. When there is too much expanding gas, it will reach the compression limit of the spring 550, resulting in the inability to play a protective role. Therefore, the specific implementation scheme of the environmentally friendly gas-insulated ring main unit according to the present application will be described below with reference to the accompanying drawings:

[0069] Specifically, as Figures 2-4 shown, in a specific embodiment of the present invention, a support structure is disposed inside 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 limit rod 571, a limit sleeve A 572 and a limit sleeve B 573 are connected to the surface of the limit rod 571, the piston 530 is provided with a limit hole 531, the limit rod 571 slidably penetrates through the limit hole 531, the limit sleeve A 572 is disposed above the piston 530, and the limit sleeve B 573 is disposed below the piston 530.

[0071] The support structure disposed inside the piston cylinder 510 has a telescopic function for adjusting the position of the support block 570. When there is too much expanding gas, by driving the support block 570 to move downward, the internal space of the piston cylinder 510 communicating with the insulating chamber is increased to accommodate more expanding gas, avoiding exceeding the elastic limit of the spring 550;

[0072] A temperature sensor and a pressure sensor are installed in the insulating chamber for detecting the internal temperature and pressure changes in real time, and driving the telescopic member 590 to perform telescopic adjustment at the first time when the changes are detected to adapt to the pressure change, so that the pressure in the insulating chamber is within the specified range;

[0073] When the cabinet body 100 has an air leakage situation, by pulling the piston 530, the pressure inside the insulation chamber is reduced, lower than the external atmospheric pressure. The outside air is introduced inward through the leakage port, so that the gas will not leak outward, and an alarm and repair are carried out in a short time to avoid the leakage of internal gas and environmental pollution;

[0074] By adding a limit sleeve B573 to limit the compression limit of the compression spring 550 in the piston cylinder 510, it plays a protective role for the spring 550 and extends the service life of the spring 550;

[0075] A limit sleeve A572 is provided to limit the elongation limit of the piston 530 stretching the spring 550, avoiding damage to the spring 550 caused by 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 cylinder. A first sealing ring is clamped in the limit hole 531, and the first sealing ring is in sealing contact with the outer surface of the limit rod 571. A second sealing ring is clamped on 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. The guide rod 533 is arranged parallel to the limit rod 571.

[0077] In a specific embodiment of the present invention, the limit sleeve A572 and the limit sleeve B573 are threaded sleeves, external threads are provided on the outer surface of the limit rod 571, and the limit sleeve A572 and the limit sleeve B573 are threadedly connected in cooperation with the external threads.

[0078] In a specific embodiment of the present invention, the limit sleeve A572 and the limit sleeve B573 are snap rings, and a clamping groove for cooperating with the snap ring to be clamped is provided on the surface of the limit rod 571.

[0079] In a specific embodiment of the present invention, a controller is installed in the isolation chamber, the telescopic member 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 electrically connected to the signal input end of the controller by wires.

[0080] When the electrical components in the existing environmental protection cabinet are disconnected, electric arcs will be generated. The electric arcs not only release heat and cause the temperature to rise, but also generate harmful gases. The harmful gases cannot be removed in the insulation chamber, which poses a safety hazard during maintenance. And after opening for maintenance, dust will enter the interior and be distributed in the built-in insulating gas, which is not easy to remove. Therefore, the following is a specific implementation plan of the environmentally friendly gas-insulated ring main unit according to the present application with reference to the drawings:

[0081] Specifically, as Figures 3-7As shown in the figure, in a specific embodiment of the present invention, a filtering component 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 filtering component 700 includes a filtering box 710, a filtering plate 730, and an exhaust fan 750. A protruding docking end is provided on one side of the filtering box 710, and the docking end is hermetically docked with the communication port 131. An air inlet and an air outlet are provided on the docking end. A one-way intake valve 711 is installed at the air inlet, and a one-way exhaust valve A 713 is installed at the air outlet. The air extraction 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 arranged at the bottom of the insulation chamber, and the filtering plate 730 is snap-fitted at the bottom of the filtering box 710.

[0083] A protruding docking end is provided on one side of the filtering box 710 and is hermetically docked with the communication port 131, which is convenient for the disassembly and assembly of the filtering box 710. Since a one-way intake valve 711 is installed at the air inlet of the docking end and a one-way exhaust valve A 713 is installed at the air outlet of the docking end; during use, when the pressure in the insulation chamber increases, the air flow in the insulation chamber will enter from the air inlet provided at the docking end and diffuse into the piston cylinder 510 through the filtering plate 730. When the pressure in the insulation chamber decreases, the gas in the piston cylinder 510 passes through the filtering plate 730 and is filtered and then enters the air outlet chamber, and is introduced into the insulation chamber from the air outlet of the docking end, so that the function of automatically filtering the gas is realized during the process of controlling and balancing the internal pressure of the insulation chamber, and the dust and harmful gases mixed in the insulation gas can be removed; a harmful gas concentration sensor is arranged in the insulation chamber. When the detected harmful gas concentration reaches a preset value, the exhaust fan 750 is controlled to extract the gas inside the conduit 751, so that the gas in the piston cylinder 510 communicated with the air outlet chamber circulates with the gas in the insulation chamber, realizing the cyclic filtration of the overall insulation gas and achieving the effect of removing harmful gases; the filtering plate 730 is snap-fitted at the bottom of the filtering box 710, which is convenient for disassembly and replacement of a new filtering plate 730, reducing the maintenance cost; the harmful gases generated by the arc are effectively removed in the insulation chamber, eliminating potential safety hazards during maintenance and repair, and cleaning the dust entering the interior.

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

[0085] HEPA filter element: mainly used for filtering fine particles in the air, and is effective for most fine particles (such as dust, pollen, smoke, etc.).

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

[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 particulate matters and is applicable to environments with higher air quality requirements.

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

[0090] Photocatalytic filter element: Utilizing photocatalytic technology, it decomposes harmful gases and 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. 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 A 713 is installed at the air outlet of the air outlet chamber;

[0092] The air outlet of the air inlet chamber is provided at the bottom of the filter box 710, and the air inlet of the air outlet chamber is provided at the bottom of the filter box 710. The filter plate 730 is hermetically covered on the surfaces of the air outlet of the air inlet chamber and the air inlet of the air outlet chamber.

[0093] In a specific embodiment of the present invention, a one-way exhaust valve B 753 is connected in series between the lower end of the conduit 751 and the air extraction port of the air extraction fan 750 through a tee.

[0094] The other constitutions and operations of the electric push rod, the air extraction fan 750, and various sensors according to the embodiments of the present application are known to those of ordinary skill in the art and will not be described in detail here.

[0095] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. An environmentally friendly gas-insulated ring main unit, characterized in that, including a cabinet body (100), the cabinet body (100) includes a housing (110) and an inner lining box (130), 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 housing (110); a cooling component (300), the cooling component (300) includes a heat conduction pipe (310), a circulation pump (330) and a container (350), the heat conduction pipe (310) is arranged in the insulating chamber, the liquid suction end of the circulation pump (330) is communicated with the liquid outlet of the container (350), the liquid outlet end of the circulation pump (330) is connected to one end of the heat conduction pipe (310), and the other end of the heat conduction pipe (310) is connected to the liquid inlet of the container (350); a gas pressure balance component (500), the gas pressure balance component (500) includes a piston cylinder (510), a piston (530) and a spring (550), a communication port (131) communicated with the piston cylinder (510) is opened on the side wall of the inner lining box (130), the piston (530) is movably arranged in the piston cylinder (510), a support block (570) is installed in the piston cylinder (510) through 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).

2. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that The heat conduction pipe (310) is connected with heat conduction fins (311), a plurality of heat conduction fins (311) are arranged in an array, and the heat conduction fins (311) are arranged on the top of the insulating 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, a cooling liquid is filled in the container (350), heat dissipation fins are connected to the outer wall of the container (350), and the heat dissipation fins extend to the surface of the housing (110).

4. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that, 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.

5. The environmentally friendly gas-insulated ring main unit according to claim 1, wherein The circulation pump (330) is fixed on one side of the container (350), and a corrugated pipe (331) is connected between the liquid suction 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, wherein The housing (110) is embedded with a waterproof junction box (111), the waterproof junction box (111) is provided with waterproof terminal blocks, and the waterproof junction box (111) is provided with a wire passing hole communicated 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 at the bottom of the cabinet body (100), mounting holes are opened on the surface of the base (101), a cabinet door (103) is installed on the front surface of the cabinet body (100), and a sealing gasket is arranged at the edge of the inner wall of the cabinet door (103), and the sealing gasket is in sealing contact with the cabinet body (100).

8. An 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, wherein, The cross-section of the piston cylinder (510) is a flat ellipse, the piston (530) is provided with a flat ellipsoid matching the inner wall of the piston cylinder (510), and the outer surface of the piston (530) is in sealed contact with the inner surface of the piston cylinder (510).

10. An 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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