Intelligent environment-friendly gas insulated ring main unit

Abstract

The application relates to the technical field of gas insulated ring network cabinets, and discloses an intelligent environment-friendly gas insulated ring network cabinet, which solves the problem that when the leakage position of an environment-friendly gas tank is positioned, the environment-friendly gas cannot be smoothly captured by a gas monitoring sensitive device, and the positioning of the leakage position of the gas tank is difficult; the airflow generated when the gas leaks in the sealing cover drives the fan blade to deflect; the position of the connecting piece where the gas tank leaks is determined according to the position of the driven measurement assembly; the specific direction of the leakage position on the side of the connecting piece is determined; the later maintenance is facilitated; the detection is not affected by the physical or chemical properties of the environment-friendly gas stored in the gas tank; the detection effect is reliable; the tracer gas is also introduced into the rubber cover; when the gas leakage of the connecting piece assembly position is slow, the tracer gas flows into the gas measurement pipe and is detected by the gas detector, and the gas leakage can also be detected, and the safety and reliability of the gas tank leakage detection are further improved.

Description

Technical Field

[0001] This invention relates to the field of gas-insulated ring main units, specifically an intelligent and environmentally friendly gas-insulated ring main unit. Background Technology

[0002] Environmentally friendly gas-insulated ring main units are a new type of power switchgear that uses environmentally friendly gases (such as dry air or nitrogen) as the insulating medium, and are designed to replace traditional SF6 gas-insulated ring main units.

[0003] The existing patent CN119401259A discloses "an intelligent environmentally friendly gas-insulated ring main unit", which includes a fan and a gas monitoring alarm that can extract and monitor the air inside the entire cabinet. Then, through a drive mechanism, connecting components, air guide hoses, air inlet hoses, soft magnetic stickers and air intake holes, it can "one by one" check for air leaks in each of the gas box's easily leaking parts to determine whether there is a leak in a certain part of the gas box. This solves the problem of the difficulty in manually locating the leak when there is a leak in the gas box.

[0004] However, considering that existing gas boxes mostly use dry air or nitrogen, which do not affect the atmospheric environment, as protective gases, when the gas leaks through the gas box assembly holes (used for assembling the filling valve, pressure relief valve, wiring terminals, etc.) during the aforementioned patent implementation testing, it cannot be well detected by the corresponding gas monitoring structure (because after dry air or nitrogen leaks into the atmospheric environment, it blends into the atmospheric environment and is difficult to detect). Therefore, when locating the leak point of a gas box filled with environmentally friendly gas, it is difficult to successfully detect the leak point of the gas box because the environmentally friendly gas is not easily and sensitively captured by the gas monitoring system. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent environmentally friendly gas-insulated ring main unit, which solves the problem that it is difficult to locate the leak in the gas box when the environmentally friendly gas is not easily detected by gas monitoring.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent environmentally friendly gas-insulated ring main unit, including a gas box for power switching, wherein the surface of the gas box plate is provided with multiple assembly holes for assembling corresponding connectors, and the surface of the connectors is provided with a detection mechanism for leak detection and position positioning.

[0007] The detection mechanism includes a sealing cover fitted onto the surface of the connector. One side of the sealing cover is provided with a rubber cover that is sealed to the surface of the connector. The inner side of the sealing cover forms a sealed space with the connector. The inner side of the sealing cover is provided with a measuring component that rotates with the airflow. Multiple measuring components are arranged along the circumference of the connector. The measuring component includes a fan blade driven by the airflow, a carbon fiber rod that is driven to rotate by the fan blade, and a trigger for detecting the rotation of the carbon fiber rod.

[0008] When air leakage occurs at the mounting point of the connector on the box panel, the leaking airflow pushes the adjacent fan blades, causing the carbon fiber rod to rotate, which is detected by the trigger.

[0009] As a further description of the above technical solution: the sealing cover is surrounded by a plurality of fittings that fit it tightly against the surface of the box plate. The fittings include a fixing seat fixedly mounted on the outside of the sealing cover and a spring clip frame fixedly mounted on the outer surface of the box plate. The fixing seat and the spring clip frame are fixedly connected by bolts.

[0010] As a further description of the above technical solution: the sealing cover has a sealing gasket on one side near the box plate, and a buckle for connecting to the rubber cover on the other side. The rubber cover is sealed to the buckle by a clamp, and the other side of the rubber cover is sealed to the surface of the connector by another clamp.

[0011] As a further description of the above technical solution: the inner side of the sealing cover is provided with a monitoring cavity for assembling trigger elements. The monitoring cavity is equipped with a circuit board that is electrically connected to multiple trigger elements. The carbon fiber rod is rotatably assembled in the sealing space between the monitoring cavity and the inner side of the sealing cover through a bearing on the inner wall of the monitoring cavity.

[0012] As a further description of the above technical solution: the triggering element includes an annular cover fixedly mounted on one side of the bearing, and two symmetrical conductive rings are provided on the inner side of the annular cover. The conductive rings are connected to the circuit board via wires for electrical signals. An insulating part is provided between the two conductive rings. The triggering element also includes a conductive brush fixed on one side of the carbon fiber rod, and the conductive brush makes slidable conductive contact with the two conductive rings.

[0013] As a further description of the above technical solution: an orientation block is fixedly installed on the surface of the carbon fiber rod inside the monitoring cavity. An iron block is fixed on one side of the orientation block, and a counterweight block is provided on the other side to balance the weight of the iron block, the insulation part, and the fan blade, so that the carbon fiber rod can maintain static balance when rotating along the axis.

[0014] As a further description of the above technical solution: the monitoring cavity is equipped with a magnetic suction plate that is attracted by the magnetic force of the iron block, and a metal column is provided on one side of the magnetic suction plate, with a coil spirally wound on the surface of the metal column.

[0015] As a further description of the above technical solution: the fan blades are disposed on one side of the carbon fiber rod.

[0016] As a further description of the above technical solution: the side of the rubber cover is connected to a vent pipe via a pressure valve, one end of the vent pipe is connected in parallel to a gas measuring pipe above the box plate, tracer gas is introduced into the inside of the rubber cover during assembly, and a gas detector for detecting the tracer gas is mounted on the gas measuring pipe.

[0017] As a further description of the above technical solution: the upper side of the box plate is provided with a gas detector that works in conjunction with the gas measuring tube to introduce pressurized gas into the gas box. The pressurizing component includes a gas storage tank that stores high-pressure gas. The gas storage tank is connected to the inside of the gas box through a vent valve.

[0018] In summary, due to the adoption of the above technical solutions, the beneficial effects of this invention are as follows: The airflow generated when air leaks inside the sealed cover drives the fan blades to deflect. Based on the position of the driven measuring components, the location of the leaking connector in the gas box can be determined, as well as the specific orientation of the leak location on one side of the connector, facilitating later maintenance. Furthermore, this detection is unaffected by the physical or chemical properties of the environmentally friendly gas stored inside the gas box, ensuring reliable detection results. Simultaneously, the fan blades are positioned on one side of the carbon fiber rod, and their plane is adjusted to be perpendicular to the airflow direction via a magnetic plate, making rotation easier and further enhancing the sensitivity of the carbon fiber rod and fan blades in detecting airflow, thus improving the sensitivity of gas box leak detection. Furthermore, tracer gas is introduced into the rubber cover. When leakage at the connector assembly location is slow, the tracer gas flows into the gas measuring tube and is detected by the gas detector, further improving the safety and reliability of gas box leak detection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the air box structure of the present invention;

[0021] Figure 3 This is a schematic diagram showing the installation location of the testing mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the disassembled structure of the detection mechanism of the present invention;

[0023] Figure 5 For the present invention Figure 4 Enlarged diagram of A in the middle;

[0024] Figure 6 This is a schematic diagram of the measurement component structure of the present invention;

[0025] Figure 7This is a schematic diagram of the trigger structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the magnetic chuck structure of the present invention;

[0027] Figure 9 This is a schematic diagram of the pressurization component structure of the present invention.

[0028] In the diagram: 10. Gas box; 11. Box plate; 12. Connector; 20. Detection mechanism; 21. Sealing cover; 211. Monitoring chamber; 212. Sealing gasket; 213. Bayonet; 22. Assembly parts; 221. Fixing base; 222. Spring clip holder; 23. Rubber cover; 231. Clamp; 24. Vent pipe; 25. Measuring component; 251. Carbon fiber rod; 252. Bearing; 253. Trigger; 2531. Annular cover; 2532. Conductive brush; 2533. Conductive ring; 2534. Wire; 2535. Insulation part; 254. Orientation block; 2541. Iron block; 2542. Counterweight block; 255. Fan blade; 26. Circuit board; 27. Magnetic suction plate; 271. Metal column; 272. Coil; 30. Pressurization component; 31. Gas storage tank; 32. Vent valve; 40. Gas measuring tube. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0031] Combination Figures 1-9 A smart environmentally friendly gas-insulated ring main unit includes a gas box 10 for power switching. The surface of the box plate 11 of the gas box 10 is provided with multiple assembly holes for assembling corresponding connectors 12. The connectors 12 include an inflation valve, a pressure relief valve, and a terminal block, which establish an electrical connection between the gas box 10 and the ring main unit. The surface of the connectors 12 is provided with a detection mechanism 20 for leak detection and position positioning.

[0032] The testing mechanism 20 includes a sealing cover 21 fitted onto the surface of the connector 12. A rubber cover 23 is provided on one side of the sealing cover 21 and is sealed to the surface of the connector 12. The inner side of the sealing cover 21 forms a sealed space with the connector 12. A measuring component 25 that rotates with the airflow is provided inside the sealing cover 21. Multiple measuring components 25 are arranged around the connector 12. The measuring component 25 includes a fan blade 255 driven by the airflow, a carbon fiber rod 251 that is driven to rotate by the fan blade 255, and a trigger 253 that detects the rotation of the carbon fiber rod 251.

[0033] When air leakage occurs at the mounting location of the connector 12 on the surface of the box plate 11, the leaking airflow pushes the adjacent fan blade 255, causing the carbon fiber rod 251 to rotate, which is detected by the trigger 253. At the same time as determining that the air box 10 is leaking, the leaking part is also accurately located relative to the specific side of the connector 12.

[0034] Specifically, the sealing cover 21 covers the outside of the connector 12, forming a sealed space with the connector 12. The measuring component 25 is assembled within the sealed space to prevent external airflow from affecting the sensitivity of the measuring component 25. The carbon fiber rod 251 has low rotational resistance. When air leakage occurs at the assembly position of the connector 12, airflow will be generated in the corresponding sealed space, thereby causing the fan blade 255 to deflect and further causing the corresponding carbon fiber rod 251 to rotate, which will be detected by the corresponding trigger 253. Based on the position of the driven measuring component 25, the position of the connector 12 where the gas box 10 leaks is determined, as well as the specific location of the leak on one side of the connector 12. This greatly facilitates subsequent manual maintenance. Furthermore, the leak location is automatically located by the leaking airflow, unaffected by the physical or chemical properties of the environmentally friendly gas stored in the gas box 10, making the leak detection and location of the leak more reliable and ensuring the safe use of the environmentally friendly gas-insulated ring main unit.

[0035] Combination Figures 2-4 The sealing cover 21 is surrounded by a plurality of fittings 22 that fit it tightly against the surface of the box plate 11. The fittings 22 include a fixing seat 221 fixedly mounted on the outside of the sealing cover 21, and a spring clip holder 222 fixedly mounted on the outer surface of the box plate 11. The fixing seat 221 and the spring clip holder 222 are fixedly connected by bolts.

[0036] A sealing gasket 212 is provided on the side of the sealing cover 21 near the box panel 11. The sealing cover 21 is pushed by the elasticity of the fixing seat 221, so that the sealing gasket 212 is sealed and adhered to the surface of the box panel 11, so that one side of the sealing cover 21 is in sealed contact with the surface of the box panel 11. The other side is provided with a bayonet 213 for connecting to the rubber cover 23. The rubber cover 23 is sealed and connected to the bayonet 213 by a clamp 231. The other side of the rubber cover 23 is sealed and connected to the surface of the connector 12 by another clamp 231. Due to the easy deformation of the rubber cover 23, the rubber cover 23 can be appropriately adjusted to achieve a sealed connection with the surface of the corresponding connector 12 to meet the conditions for forming a sealed space inside the sealing cover 21.

[0037] Combination Figures 4-7 The inner side of the sealing cover 21 is provided with a monitoring cavity 211 for assembling the trigger element 253. A circuit board 26, electrically connected to multiple trigger elements 253, is installed inside the monitoring cavity 211. The carbon fiber rod 251 is rotatably mounted within the sealed space between the monitoring cavity 211 and the inner side of the sealing cover 21 via a bearing 252 on the inner wall of the monitoring cavity 211. The monitoring cavity 211 houses the trigger element 253 for detecting the rotation of the carbon fiber rod 251 and the circuit board 26 inside. The sealed internal space prevents oxidation of the trigger element 253 due to contact with air during later maintenance, further extending the service life of the trigger element 253 and the circuit board 26.

[0038] The trigger 253 includes an annular cover 2531 fixedly mounted on one side of the bearing 252. Two symmetrical conductive rings 2533 are provided inside the annular cover 2531. The conductive rings 2533 are electrically connected to the circuit board 26 through wires 2534. An insulating part 2535 is provided between the two conductive rings 2533. The trigger 253 also includes a conductive brush 2532 fixed on one side of the carbon fiber rod 251. The conductive brush 2532 slides in contact with the two conductive rings 2533 to achieve conductivity.

[0039] Under normal conditions, the conductive brush 2532 is located on one side of the insulating part 2535, and the two conductive rings 2533 are in an open circuit state. When air leakage occurs at the installation part of the connector 12, causing airflow in the sealed space inside the sealing cover 21, the carbon fiber rod 251 will rotate through the fan blade 255. This will cause the conductive brush 2532 connected to one side of the carbon fiber rod 251 to slide along the inner wall of the annular cover 2531. When it makes conductive contact with the two conductive rings 2533, the two conductive rings 2533 will be in a closed circuit state. The circuit board 26 receives the circuit circuit signal of the trigger 253, and can then know that the carbon fiber rod 251 has rotated. The circuit board 26 is equipped with a signal processor, which can convert the signal of the circuit connection of the corresponding trigger 253 into a signal corresponding to the position of the measuring component 25. This can further determine the air leakage problem on the corresponding side of the connector 12, ensuring the safe use of the environmentally friendly gas-insulated ring main unit.

[0040] Combination Figures 6-7 A directional block 254 is fixedly installed on the surface of the carbon fiber rod 251 inside the monitoring cavity 211. An iron block 2541 is fixedly installed on one side of the directional block 254, and a counterweight 2542 is installed on the other side to balance the weight of the iron block 2541, the insulating part 2535, and the fan blade 255, so that the carbon fiber rod 251 can rotate along the axis to maintain static balance.

[0041] The monitoring cavity 211 is equipped with a magnetic suction plate 27 that is attracted by the magnetic force of the iron block 2541. A metal column 271 is provided on one side of the magnetic suction plate 27, and a coil 272 is spirally wound on the surface of the metal column 271.

[0042] Specifically, considering that the carbon fiber rod 251 is more likely to rotate due to airflow when the force-bearing surface of the fan blade 255 is perpendicular to the airflow direction, after the sealing cover 21 is assembled on the outside of the connector 12, the plane of the fan blade 255 should also be adjusted to be perpendicular to the airflow direction. This implementation is achieved by: first controlling the current to pass through the coil 272 to make the metal column 271 magnetic, so that the magnetic force attracts the iron block 2541, and further controlling the multiple carbon fiber rods 251 to rotate synchronously, so that the multiple fan blades 255 connected to it are synchronously adjusted to the preset position. Then, after the airflow in the sealed space inside the sealing cover 21 is stabilized, the current in the coil 272 is cut off, so that the carbon fiber rod 251 is in a free rotation state, so that the fan blade 255 can be used to detect the air leakage of the air box 10.

[0043] Combination Figure 6 The fan blade 255 is positioned on one side of the carbon fiber rod 251 so that when the airflow pushes the fan blade 255, its thrust can easily act on one side of the carbon fiber rod 251, making it easier for the carbon fiber rod 251 to rotate. This further enhances the sensitivity of the carbon fiber rod 251 in conjunction with the fan blade 255 to detect airflow, thereby improving the sensitivity of detecting gas leakage in the gas box 10 and further ensuring the safe use of the environmentally friendly gas-insulated ring main unit.

[0044] Combination Figures 2-4 The side of the rubber cover 23 is connected to a vent pipe 24 via a pressure valve. One end of the vent pipe 24 is connected in parallel to the gas measuring pipe 40 above the box plate 11. During assembly, a tracer gas, such as helium commonly used as a tracer gas, is introduced into the inside of the rubber cover 23. A gas detector for detecting the tracer gas is mounted on the gas measuring pipe 40, which is not shown in the figure. When the pressure inside the rubber cover 23 increases, the pressure valve connected to one end of the vent pipe 24 automatically connects to the vent pipe 24.

[0045] Specifically, when the air leakage at the assembly position of connector 12 is extremely slow, making it difficult for the generated airflow to drive the fan blade 255 to cause the carbon fiber rod 251 to rotate, as the pressure inside the sealing cover 21 increases due to air leakage, the pressure valve opens and connects to the vent pipe 24. Subsequently, the tracer gas stored in the rubber cover 23 flows into the gas measuring pipe 40 through the vent pipe 24 and is detected by the gas detector. Then, the gas detector issues an alarm, indicating that there is a leak in the alarm gas box 10, further ensuring the safe use of the environmentally friendly gas-insulated ring main unit.

[0046] Combination Figure 2 , Figure 9 The upper side of the box plate 11 is equipped with a gas detector that works with the gas measuring tube 40 to introduce pressurized gas into the gas box 10. The pressurization component 30 includes a gas storage tank 31 that stores high-pressure gas. The gas storage tank 31 is connected to the inside of the gas box 10 through a vent valve 32.

[0047] Specifically, when the gas detector mounted on the gas measuring tube 40 detects a leak in the gas box 10, it has not yet been determined which connector 12 is leaking or the specific location of the leak. In this embodiment, when the gas detector issues an alarm, the vent valve 32 is simultaneously opened, causing high-pressure gas from the gas storage tank 31 to be injected into the gas box 10. This increases the gas pressure inside the gas box 10, thereby accelerating the leak in the connector 12 and increasing the gas flow rate. This allows the fan blades 255 to be smoothly driven, enabling the measuring component 25 to successfully detect the leaking connector 12 and the specific location of the leak.

[0048] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent environmentally friendly gas insulated ring main unit, comprising a gas tank (10) for a power switch, a plurality of connecting pieces (12) are arranged on the surface of a tank plate (11) of the gas tank (10), characterized in that: The connecting piece (12) is provided with a detection mechanism (20) on the surface for detecting gas leakage and positioning; The detection mechanism (20) comprises a sealing cover (21) sleeved on the surface of the connecting piece (12), one side of the sealing cover (21) is provided with a rubber cover (23) in sealing connection with the surface of the connecting piece (12), the inner side of the sealing cover (21) forms a sealed space with the connecting piece (12), the inner side of the sealing cover (21) is provided with a measuring assembly (25) rotating with the airflow, a plurality of measuring assemblies (25) are arranged along the circumference of the connecting piece (12), the measuring assembly (25) comprises a fan blade (255) driven by the airflow, a carbon fiber rod (251) rotating with the fan blade (255), and a trigger (253) detecting the rotating action of the carbon fiber rod (251); When the connecting piece (12) leaks at the mounting position on the surface of the box plate (11), the adjacent fan blade (255) is pushed by the airflow, and the carbon fiber rod (251) is rotated and detected by the trigger (253); The inner side of the sealing cover (21) is provided with a monitoring cavity (211) for assembling the trigger (253), the monitoring cavity (211) is internally provided with a circuit board (26) in electrical signal connection with a plurality of triggers (253), and the carbon fiber rod (251) is rotatably assembled in the monitoring cavity (211) and the sealed space on the inner side of the sealing cover (21) through a bearing (252) on the inner wall of the monitoring cavity (211); The trigger (253) comprises an annular cover (2531) fixedly assembled on one side of the bearing (252), the inner side of the annular cover (2531) is provided with two symmetrical conductive rings (2533), the conductive rings (2533) are in electrical signal connection with the circuit board (26) through wires (2534), and an insulating portion (2535) is arranged between the two conductive rings (2533). The trigger (253) further comprises a conductive brush (2532) fixed to one side of the carbon fiber rod (251), and the conductive brush (2532) is in sliding conductive contact with the two conductive rings (2533); When the two conductive rings (2533) are in conductive contact, the two conductive rings (2533) are in a path state, the circuit board (26) receives the circuit path signal of the trigger (253), and it can be determined that the carbon fiber rod (251) rotates. The circuit board (26) is provided with a signal processor, which can convert the signal corresponding to the line communication of the trigger (253) into a signal corresponding to the position of the measuring assembly (25), so as to further determine the gas leakage problem existing in the corresponding side of the connecting piece (12), and ensure the safe use of the environmentally friendly gas insulated ring network cabinet.

2. The intelligent environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: A plurality of assembly parts (22) are arranged around the sealing cover (21) to tightly contact the surface of the box plate (11), the assembly part (22) comprises a fixed seat (221) fixedly assembled on the outer side of the sealing cover (21), and a spring holder (222) fixedly assembled on the outer surface of the box plate (11), and the fixed seat (221) and the spring holder (222) are fixedly connected through bolts.

3. The intelligent environmentally friendly gas insulated ring main unit according to claim 2, characterized in that: The sealing cover (21) is provided with a sealing gasket (212) near one side of the box plate (11), and is provided with a bayonet (213) connected with the rubber cover (23) on the other side, the rubber cover (23) is sealedly connected with the bayonet (213) through a clamp (231), and the other side of the rubber cover (23) is sealedly connected with the surface of the connecting piece (12) through another clamp (231).

4. The intelligent environmentally friendly gas insulated ring main unit according to claim 3, characterized in that: The surface of the carbon fiber rod (251) is fixedly provided with a directional block (254) inside the monitoring cavity (211), one side of the directional block (254) is fixedly provided with an iron block (2541), and the other side is provided with a counterweight block (2542) balancing the weight of the insulating part (2535) and the fan blade (255), so that the carbon fiber rod (251) rotates along the shaft and keeps static balance.

5. The intelligent environmentally friendly gas insulated ring main unit according to claim 4, characterized in that: The monitoring cavity (211) is provided with a magnetic attraction plate (27) magnetically attracted to the iron block (2541), one side of the magnetic attraction plate (27) is provided with a metal column (271), and the surface of the metal column (271) is spirally wound with a coil (272).

6. The intelligent environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The fan blade (255) is arranged on one side of the carbon fiber rod (251).

7. The intelligent environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The rubber cover (23) is connected with an air pipe (24) through a pressure valve on the side surface, one end of the air pipe (24) is connected in parallel with a gas measuring pipe (40) above the box plate (11), and the inside of the rubber cover (23) is filled with a tracer gas during assembly.

8. The intelligent environmentally friendly gas insulated ring main unit according to claim 7, characterized in that: The upper side of the box plate (11) is provided with a pressurizing assembly (30) for filling pressure gas into the gas tank (10) in cooperation with the gas detector assembled on the gas measuring pipe (40), and the pressurizing assembly (30) comprises a gas storage tank (31) storing high-pressure gas, and the gas storage tank (31) is communicated with the inside of the gas tank (10) through a gas release valve (32).

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