Environment-friendly energy-saving gas-insulated switchgear for power distribution network

Abstract

The embodiment of the utility model provides an environment-friendly and energy-saving gas-insulated switchgear for a power distribution network, and the cabinet comprises an airtight box body which is used for providing a sealed space; the environment-friendly gas injection unit is arranged in the airtight box body; the gas monitoring device is arranged in the airtight box body; the exhaust valve is arranged on the airtight box body, is connected with the environment-friendly gas injection unit through a pipeline and is used for exhausting gas; the internal supporting frame is arranged in the airtight box body and is used for providing fixation; wherein the environment-friendly gas injection unit comprises a high-pressure gas cylinder and an automatic pressure regulating valve, the high-pressure gas cylinder is used for storing environment-friendly insulating gas, and the automatic pressure regulating valve is connected with the high-pressure gas cylinder; a filter is arranged at an inlet of the high-pressure gas cylinder, and a check valve is arranged at an outlet of the high-pressure gas cylinder, so that gas backflow is prevented. According to the scheme of the embodiment of the invention, the problem that the insulating property is reduced due to the change of gas components in the gas-insulated switchgear can be solved.

Description

Technical Field

[0001] This application relates to the field of electrical engineering technology, specifically to an environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks. Background Technology

[0002] Gas-insulated switchgear for power distribution networks is an electrical device used in power distribution networks. It uses environmentally friendly gases instead of traditional sulfur hexafluoride (SF6) gas to achieve better environmental protection and energy saving. This type of switchgear can effectively reduce environmental pollution and improve energy efficiency during operation. However, this device has a significant drawback: the gas composition inside the switchgear may change over time. This can lead to pressure variations and a gradual decrease in the switchgear's insulation performance, thus affecting its stability and safety. Summary of the Invention

[0003] In view of this, the present disclosure provides an environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks, which at least partially solves the problems existing in the prior art.

[0004] This application provides an environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks, comprising:

[0005] An airtight enclosure is used to provide a sealed space and maintain a stable internal gas composition;

[0006] An environmentally friendly gas injection unit is installed inside the airtight box and is used to inject environmentally friendly insulating gas and maintain a constant pressure.

[0007] A gas monitoring device is installed inside the airtight enclosure to monitor the internal gas composition and pressure changes in real time.

[0008] An exhaust valve is installed on the airtight housing and connected to the environmentally friendly gas injection unit via a pipeline for discharging gas.

[0009] An internal support frame, located inside the airtight enclosure, is used to provide fixation; wherein

[0010] The environmentally friendly gas injection unit includes a high-pressure gas cylinder and an automatic pressure regulating valve. The high-pressure gas cylinder is used to store environmentally friendly insulating gas, and the automatic pressure regulating valve is connected to the high-pressure gas cylinder.

[0011] The high-pressure gas cylinder is equipped with a filter at its inlet and a check valve at its outlet to prevent gas backflow.

[0012] Preferably, the outer layer of the airtight enclosure is a high-strength stainless steel layer, the inner layer is a high-purity aluminum layer, and a shielding layer for electromagnetic interference is sandwiched in between.

[0013] Preferably, the bottom of the airtight enclosure is provided with multiple inspection holes, and a sealing ring is installed at each inspection hole.

[0014] Preferably, the top of the airtight enclosure is equipped with a transparent observation window and adopts a double-layer structure design.

[0015] Preferably, the automatic pressure regulating valve is equipped with a pressure sensor that can monitor the gas pressure in real time and transmit the data to the control unit, which is connected to the automatic pressure regulating valve.

[0016] Preferably, the gas monitoring device employs multi-point distributed gas sensors and transmits the data to a remote monitoring system via a wireless communication module.

[0017] Preferably, the exhaust valve has a double sealing structure, including an inner metal sealing ring and an outer rubber sealing gasket.

[0018] Preferably, the exhaust valve is equipped with a gas filter at the exhaust port.

[0019] This disclosure provides an environmentally friendly and energy-saving gas-filled switchgear for power distribution networks, comprising: an airtight enclosure for providing a sealed space and maintaining stable internal gas composition; an environmentally friendly gas injection unit disposed within the airtight enclosure for injecting environmentally friendly insulating gas and maintaining a constant pressure; a gas monitoring device disposed within the airtight enclosure for real-time monitoring of internal gas composition and pressure changes; an exhaust valve disposed on the airtight enclosure and connected to the environmentally friendly gas injection unit via a pipeline for discharging gas; and an internal support frame disposed within the airtight enclosure for providing fixation. The environmentally friendly gas injection unit includes a high-pressure gas cylinder and an automatic pressure regulating valve. The high-pressure gas cylinder stores the environmentally friendly insulating gas, and the automatic pressure regulating valve is connected to the high-pressure gas cylinder. A filter is provided at the inlet of the high-pressure gas cylinder, and a check valve is provided at the outlet of the high-pressure gas cylinder to prevent gas backflow. This solution addresses the problem of decreased insulation performance caused by changes in gas composition within the gas-filled switchgear. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the exemplary embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the axonal structure of the gas-filled cabinet of this utility model;

[0022] Figure 2 For this utility model Figure 1 Schematic diagram of the internal structure of the gas-filled switchgear;

[0023] Figure 3 For this utility model Figure 2 Enlarged cross-sectional view of the exhaust valve.

[0024] In the diagram: 1. Airtight enclosure; 2. Environmentally friendly gas injection unit; 3. Gas monitoring device; 4. Exhaust valve; 5. Internal support frame; 6. Shielding layer; 7. Inspection hole; 8. Filter screen; 9. Transparent observation window; 10. High-pressure gas cylinder; 11. Automatic pressure regulating valve; 12. Pressure sensor; 13. Control unit; 14. Filter; 15. Check valve; 16. Gas sensor; 17. Wireless communication module; 18. Remote monitoring system; 19. Inner metal sealing ring; 20. Outer rubber sealing gasket; 21. Gas filtration device. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings. The illustrative implementation methods and descriptions of the embodiments of this disclosure are only used to explain the embodiments of this disclosure and are not intended to limit the embodiments of this disclosure.

[0026] like Figure 1 As shown, an environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to this application includes an airtight enclosure 1, an environmentally friendly gas injection unit 2, a gas monitoring device 3, an exhaust valve 4, and an internal support frame 5 (see [reference]). Figure 2 The main function of this gas-insulated switchgear for power distribution networks is to provide an environmentally friendly and stable insulation environment under sealed conditions. The airtight enclosure 1 provides a sealed space for the entire switchgear, ensuring the stability of the internal gas composition and preventing it from being affected by external factors. An environmentally friendly gas injection unit 2 is installed inside the airtight enclosure 1, responsible for injecting environmentally friendly insulating gas into the enclosure and maintaining a constant gas pressure. A gas monitoring device 3 is also installed inside the airtight enclosure 1 to monitor changes in gas composition and pressure within the enclosure in real time. An exhaust valve 4 is located outside the airtight enclosure 1 and is connected to the environmentally friendly gas injection unit 2 via a pipe, enabling timely discharge of harmful gases when changes in gas composition or abnormal pressure are detected. An internal support frame 5 is installed inside the airtight enclosure 1 to secure the various functional components and ensure their normal operation.

[0027] Specifically, the airtight enclosure 1 is typically made of high-strength, low-permeability materials, such as stainless steel or other alloys, to ensure sealing and durability during long-term use. The enclosure's structural design is rational, adaptable to various complex environmental conditions. The environmentally friendly gas injection unit 2 mainly consists of a gas tank, a pressure regulator, and a gas path control system. The gas tank contains environmentally friendly insulating gas, the pressure regulator precisely controls the gas pressure, and the gas path control system ensures a continuous gas supply. The gas monitoring device 3 includes various sensors and a data analysis module. The sensors detect gas composition (such as CO2, N2, etc.) and pressure, while the data processing module analyzes and displays the data collected by the sensors in real time. The exhaust valve 4 consists of a valve body, valve core, and actuator. The actuator automatically or manually opens or closes the valve based on the data signal provided by the gas monitoring device 3 to discharge any substandard gases from the enclosure. The internal support frame 5 consists of multiple metal support components, which are welded or bolted together to form a stable structure, ensuring the stability and reliability of each component.

[0028] Specifically, for example, the gas storage tank of the environmentally friendly gas injection unit 2 is connected to the interior of the airtight enclosure 1 via a dedicated pipeline. The gas path control system includes solenoid valves and flow meters, which can automatically activate when the system needs to ensure that the injected gas reaches the required purity and pressure. The gas monitoring device 3 is installed on the inner wall of the enclosure using an embedded method. Various sensors are connected to the data processing module via cables. The module communicates with the main control system wirelessly or via wired means to achieve real-time data transmission and remote monitoring. The exhaust valve 4 is usually installed at the top or side of the enclosure and is connected to the venting pipe in the gas path control system via a connecting pipe to ensure smooth gas discharge. The internal support frame 5 has a flexible installation method and can be adjusted according to the actual needs of the equipment to ensure that all functional components are firmly fixed and to avoid damage caused by vibration generated during equipment operation.

[0029] In this application, the dynamic balance and stable control of the gas composition inside the gas-filled cabinet are achieved through the synergistic action of the environmentally friendly gas injection unit 2, the gas monitoring device 3, and the exhaust valve 4. When the gas monitoring device 3 detects changes in gas composition or abnormal pressure, it can respond quickly by adjusting the gas pressure or expelling undesirable gases through the gas circuit control system, thereby ensuring that the gas inside the gas-filled cabinet always maintains an ideal insulation state. This effectively solves the problem of decreased insulation performance caused by changes in gas composition, improving the reliability and safety of the equipment. This design not only protects the normal operation of the power distribution system but also extends the service life of the equipment, reduces maintenance costs, and meets the requirements of green environmental protection and high energy efficiency in modern power distribution networks.

[0030] In one embodiment, the airtight enclosure 1 of the environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks of this application is made of multi-layer composite materials. The outer layer is made of high-strength stainless steel, which not only provides excellent physical strength and corrosion resistance but also has a good appearance and weather resistance. The inner layer is made of high-purity aluminum, which has excellent thermal conductivity and processing performance, effectively dissipating heat and protecting the internal electrical equipment. Between these two layers is a shielding layer 6 for electromagnetic interference prevention. This layer is usually made of highly conductive metal materials or alloys, which can effectively shield external electromagnetic interference and ensure the stable operation of the electrical equipment inside the gas-insulated switchgear.

[0031] In one embodiment, the electromagnetic interference shielding layer 6 is sandwiched between the outer stainless steel layer and the inner aluminum layer by adhesive bonding or mechanical fastening, ensuring a tight bond between the three layers. This design not only improves the overall airtightness and prevents gas leakage within the gas chamber, but also effectively resists external electromagnetic interference, reduces the impact on internal electrical equipment, and ensures the long-term stable operation of the gas chamber. For example, in actual production, these three layers can be firmly bonded together by welding or sealing adhesives, while strictly controlling the thickness and quality of each layer during manufacturing to ensure the overall performance of the gas chamber.

[0032] like Figure 2 As shown, in one embodiment, in an environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to this application, the bottom of the airtight enclosure 1 is provided with multiple inspection holes 7, and sealing rings 8 are installed at these inspection holes 7. Specifically, the inspection holes 7 are distributed at the bottom of the airtight enclosure 1, and by reasonably arranging these holes, maintenance can be carried out in case of a fault. The sealing rings 8 are installed on the outer periphery of each inspection hole 7, and their purpose is to provide a seal.

[0033] In one embodiment, continue to refer to Figure 2 This application discloses an environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks, in which a transparent observation window 9 is installed on the top of the airtight enclosure 1. This transparent observation window 9 adopts a double-layer structure design, with an inner layer of explosion-proof glass and an outer layer of high-strength polycarbonate material. This design not only allows operators to easily check the state of the gas inside the switchgear at any time but also provides better safety protection, ensuring the reliable operation of the switchgear. The transparent observation window 9 is installed on the top of the airtight enclosure 1 so that operators can directly observe the internal situation without opening the cabinet door, ensuring that changes in the gas composition inside the switchgear do not lead to a decrease in insulation performance.

[0034] Specifically, the transparent observation window 9 consists of two parts: an inner layer of explosion-proof glass located inside the outer layer of high-strength polycarbonate. The inner explosion-proof glass offers excellent transparency and impact resistance, effectively preventing glass breakage under high internal pressure. The outer high-strength polycarbonate material provides additional safety protection, preventing damage to the observation window from accidental impacts in the external environment. The tight bond between the two layers ensures the overall airtightness and transparency of the observation window. For example, epoxy resin or other high-strength adhesives can be used to firmly connect the two layers, ensuring no loosening or air leakage during long-term use.

[0035] In one embodiment, the environmentally friendly gas injection unit 2 of the environmentally friendly and energy-saving gas-filled switchgear for power distribution networks of this application includes a high-pressure gas cylinder 10 and an automatic pressure regulating valve 11. The high-pressure gas cylinder 10 is used to store environmentally friendly insulating gas, while the automatic pressure regulating valve 11 is connected to the high-pressure gas cylinder 10 and can automatically adjust the gas pressure when the internal gas pressure drops, maintaining a stable gas composition. The automatic pressure regulating valve 11 is equipped with a pressure sensor 12, which can monitor the gas pressure in real time and transmit the data to the control unit 13. The control unit 13 controls the opening and closing of the automatic pressure regulating valve 11 according to preset parameters, precisely controlling the gas injection volume, thereby ensuring that the gas composition and pressure are always kept within the optimal range. In addition, a filter 14 is provided at the inlet of the high-pressure gas cylinder 10 to filter impurities entering the gas cylinder and prevent contaminants from entering the gas-filled switchgear. A check valve 15 is provided at the outlet of the high-pressure gas cylinder 10 to prevent gas backflow and ensure stable gas quality.

[0036] In another embodiment, the high-pressure gas cylinder 10 can also be installed at the bottom of the filling cabinet and connected to the gas chamber inside the filling cabinet via a pipeline. An automatic pressure regulating valve 11 is installed on the pipeline between the high-pressure gas cylinder 10 and the gas chamber, and a pressure sensor 12 is embedded inside the automatic pressure regulating valve 11. A control unit 13 is installed on the control panel of the filling cabinet and is connected to the pressure sensor 12 and the automatic pressure regulating valve 11 via a signal line, receiving and processing data from the pressure sensor 12. A filter 14 is installed at the inlet end of the high-pressure gas cylinder 10, while a check valve 15 is installed at the outlet end of the high-pressure gas cylinder 10 to ensure the direction and quality of gas flow. For example, when the pressure sensor 12 detects that the gas pressure is lower than a preset value, the control unit 13 will issue a command to open the automatic pressure regulating valve 11, allowing gas from the high-pressure gas cylinder 10 to replenish the gas chamber through the pipeline until the pressure returns to the set range.

[0037] In one embodiment, the gas monitoring device 3 for an environmentally friendly and energy-saving gas-insulated switchgear used in a power distribution network employs multi-point distributed gas sensors 16, enabling monitoring of gas composition and pressure changes at different locations within the switchgear. These gas sensors 16 are distributed at key locations inside the switchgear, ensuring effective detection of gas changes in all areas. The gas sensors 16 collect data in real time via an internal microcontroller and transmit the data to a remote monitoring system 18 through a wireless communication module 17, achieving remote monitoring and early warning functions. This allows operators to promptly detect and handle abnormal situations, ensuring the stable operation of the gas-insulated switchgear.

[0038] In one embodiment, the gas sensor 16 has a self-cleaning function, which automatically activates a cleaning mode after each monitoring cycle to remove surface contaminants and maintain the sensor's sensitivity and accuracy. This self-cleaning function is achieved through a built-in low-power cleaning nozzle and ultrasonic generator, effectively removing dust and other contaminants from the sensor surface. This reduces false readings caused by sensor failure and ensures long-term stable monitoring performance.

[0039] In one embodiment, the remote monitoring system 18 possesses intelligent analysis and prediction capabilities, enabling it to predict future gas composition trends based on historical data and real-time monitoring results. The system analyzes large amounts of data using integrated machine learning algorithms to identify potential risk points and take proactive measures to prevent sudden degradation of insulation performance. This intelligent analysis and prediction function enhances the overall reliability of the system and effectively solves the problem of insulation performance degradation caused by changes in gas composition within the gas-filled cabinet. For example, the system can issue an alarm based on the gas composition change trend before the gas composition reaches a critical value, prompting operators to perform maintenance or adjustments, thereby avoiding a decline in insulation performance.

[0040] refer to Figure 3 In one embodiment, the exhaust valve 4 of the environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks of this application is equipped with a double-sealing structure to ensure no gas leakage during the exhaust process. This double-sealing structure consists of an inner metal sealing ring 19 and an outer rubber sealing gasket 20. The inner metal sealing ring 19 is located inside the exhaust valve 4, in close contact with the valve core, providing high-strength sealing performance; the outer rubber sealing gasket 20 is installed outside the metal sealing ring, further enhancing the sealing effect and preventing any gas leakage. Furthermore, a gas filter device 21 is installed at the exhaust port. This device consists of filter material and a housing, effectively filtering harmful components in the exhaust gas. The filtered harmful gases are transported through a dedicated pipeline to a waste gas treatment device for treatment, preventing direct discharge into the environment and causing pollution.

[0041] For example, the inner metal sealing ring 19 of the exhaust valve 4 is made of highly corrosion-resistant and highly elastic stainless steel, which fits tightly against the valve core surface to provide a reliable seal. The outer rubber sealing gasket 20 is made of high-temperature and corrosion-resistant silicone rubber, covering the outside of the metal sealing ring to ensure a double sealing effect. The gas filtration device 21 at the exhaust port consists of filter material and a metal shell. The filter material uses a multi-layer composite material with high-efficiency adsorption and catalytic decomposition, which can effectively capture and decompose harmful gases. Specifically, the filtered gas is transported to the waste gas treatment device through a dedicated pipeline to ensure that gas emissions meet environmental protection standards.

[0042] In actual operation, when this device is in use, the airtight enclosure 1 first provides a completely sealed environment, ensuring that the gas composition inside the gas-filled cabinet is not affected by the external environment. The environmentally friendly gas injection unit 2 is responsible for injecting specific environmentally friendly insulating gas into the airtight enclosure 1 and maintaining it within a preset pressure range. This process is monitored in real time by the gas monitoring device 3 to ensure that the composition and pressure of the internal gas always meet the requirements. Once the gas monitoring device 3 detects an abnormal change in the internal gas composition or the pressure exceeds the predetermined range, the system will respond immediately. The exhaust valve 4 will automatically open after the gas monitoring device 3 sends a signal, expelling any defective or excessive gas. Simultaneously, the environmentally friendly gas injection unit 2 will automatically replenish fresh gas until the gas composition and pressure inside the airtight enclosure 1 return to normal levels. Throughout the process, the internal support frame 5 plays a crucial role in fixing the components, ensuring the stability of all functional parts and preventing functional failure due to mechanical vibration or other reasons. These components cooperate with each other to maintain the stability of the internal environment of the gas-filled cabinet, thereby effectively solving the problem of decreased insulation performance caused by changes in gas composition and ensuring the safe and reliable operation of the gas-filled cabinet.

[0043] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks, characterized in that, include: An airtight enclosure (1) is used to provide a sealed space and maintain the stability of the internal gas composition; An environmentally friendly gas injection unit (2) is installed inside the airtight housing (1) and is used to inject environmentally friendly insulating gas and maintain a constant pressure. A gas monitoring device (3) is installed inside the airtight enclosure (1) to monitor the internal gas composition and pressure changes in real time. An exhaust valve (4) is installed on the airtight housing (1) and connected to the environmentally friendly gas injection unit (2) through a pipeline for discharging gas. An internal support frame (5) is located inside the airtight enclosure (1) and is used to provide fixation; wherein The environmentally friendly gas injection unit (2) includes a high-pressure gas cylinder (10) and an automatic pressure regulating valve (11). The high-pressure gas cylinder (10) is used to store environmentally friendly insulating gas, and the automatic pressure regulating valve (11) is connected to the high-pressure gas cylinder (10). The high-pressure gas cylinder (10) is equipped with a filter (14) at its inlet and a check valve (15) at its outlet to prevent gas backflow.

2. The environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to claim 1, characterized in that: The outer layer of the airtight enclosure (1) is a high-strength stainless steel layer, the inner layer is a high-purity aluminum layer, and a shielding layer (6) for electromagnetic interference is sandwiched in the middle.

3. The environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to claim 1, characterized in that: The airtight enclosure (1) has multiple inspection holes (7) at its bottom, and a sealing ring (8) is installed at each inspection hole (7).

4. The environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to claim 2, characterized in that: The airtight enclosure (1) is equipped with a transparent observation window (9) on its top and adopts a double-layer structure design.

5. The environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to claim 1, characterized in that: The automatic pressure regulating valve (11) is equipped with a pressure sensor (12) which can monitor the gas pressure in real time and transmit the data to the control unit (13). The control unit (13) is connected to the automatic pressure regulating valve (11).

6. The environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to claim 1, characterized in that: The gas monitoring device (3) uses multi-point distributed gas sensors (16) and transmits the data to the remote monitoring system (18) through the wireless communication module (17).

7. The environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to claim 1, characterized in that: The exhaust valve (4) is equipped with a double sealing structure, including an inner metal sealing ring (19) and an outer rubber sealing gasket (20).

8. The environmentally friendly and energy-saving gas-insulated switchgear for power distribution networks according to claim 7, characterized in that: The exhaust valve (4) is equipped with a gas filter (21) at the exhaust port.

Images