Online monitoring device for monitoring SF6 micro-water density

Abstract

The invention discloses an online monitoring device for monitoring SF6 micro-water density, and relates to the technical field of gas monitoring. The device comprises a detection cavity, one side of the detection cavity is fixedly connected with an air inlet, the other side of the detection cavity is fixedly connected with a connecting port, one end of the air inlet and one end of the connecting port are fixedly connected with flange plates, the top of the detection cavity is fixedly connected with an infrared spectrum sensor, and the bottom of the infrared spectrum sensor is fixedly connected with a sensing probe. The device is provided with the cleaning assembly, the cleaning assembly is started to operate through the external controller, and dust, particles and other pollutants attached to the surface of the sensing probe can be removed through the cleaning assembly, so that absorption and scattering of infrared light are reduced, and the accuracy of measured data is improved; therefore, the service life of the infrared spectrum sensor is prolonged, the fault and replacement frequency of the infrared spectrum sensor caused by pollution are reduced, and the long-term maintenance cost can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of gas monitoring, and in particular to an online monitoring device for monitoring SF6 micro-water density. Background Art

[0002] SF6 gas is a commonly used insulating medium in high-voltage electrical equipment. Its trace water content is crucial to the safe operation of the equipment. The presence of trace moisture will reduce the insulation performance of SF6 and increase the risk of equipment failure. Therefore, real-time monitoring of the trace water content in SF6 gas is of great significance for preventing equipment failure, extending equipment life, and ensuring the stable operation of the power system.

[0003] The existing SF6 micro-water density monitoring technology mainly uses infrared spectrum sensors. Infrared spectrum sensors indirectly determine the micro-water content by measuring the transmittance or absorbance of infrared light of a specific wavelength in SF6 gas. This method has the advantages of high sensitivity, fast response speed and easy operation.

[0004] However, in actual applications of infrared spectroscopy sensors, the sensor probes are easily affected by pollutants such as dust and particulate matter in the SF6 gas environment. These pollutants may adhere to the sensor probes, affecting their absorption and emission of infrared light, thereby interfering with the accurate measurement of micro-water content and density. In the prior art, the cleaning and maintenance of the sensor probes often require manual disassembly of the monitoring equipment for operation, which is not only inefficient but also difficult to ensure the cleaning effect. For this reason, the present application provides an online monitoring device for monitoring SF6 micro-water density. Summary of the invention

[0005] The purpose of this application is to solve the problem that in practical applications, pollutants may adhere to the sensor probe, affecting its absorption and emission of infrared light, thereby interfering with the accurate measurement of micro-water content and density. This application provides an online monitoring device for monitoring SF6 micro-water density.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: An online monitoring device for monitoring SF6 micro-water density comprises a detection cavity, one side of the detection cavity is fixedly connected with an air inlet, the other side of the detection cavity is fixedly connected with a connecting port, one end of the air inlet and the connecting port are fixedly connected with flanges, the top of the detection cavity is fixedly connected with an infrared spectrum sensor, the bottom of the infrared spectrum sensor is fixedly connected with a sensing probe, the sensing probe is located inside the detection cavity, a sealing door is provided on one side of the detection cavity, two supporting blocks are fixedly connected to the inner top surface of the detection cavity, the opposite surfaces of the two supporting blocks are fixedly connected with a fixing ring, a cleaning component is installed inside the fixing ring, and the sensing probe is located inside the fixing ring.

[0007] By adopting the above technical solution, the electrical equipment containing SF6 gas is connected to the air inlet through the pipeline, and then the air pressure detection instrument is connected to the connection port. At this time, the SF6 gas inside the electrical equipment will circulate inside the detection cavity through the air inlet. Through the cooperation of the infrared spectrum sensor and the sensor probe, when the SF6 gas molecules absorb infrared light of a specific wavelength, the light intensity will be weakened. This change can be detected by the infrared detector and converted into corresponding concentration information through the signal processing circuit to measure the transmittance or absorption rate of infrared light of a specific wavelength in SF6 gas, so as to indirectly determine the micro-water content, and transmit the monitoring results to the external controller in real time, and then present them on the display screen, so that the staff can accurately understand The situation of SF6 gas. Secondly, during the long-term monitoring process, there may be dust, particulate matter and other pollutants in the SF6 gas environment, and the gas will contain a certain amount of moisture. These pollutants may adhere to the sensor probe after contacting with moisture, affecting its absorption and emission of infrared light, thereby interfering with the accurate measurement of micro-water content and density. Therefore, the cleaning components can be used to remove dust, particulate matter and other pollutants attached to the surface of the sensor probe, thereby reducing the absorption and scattering of infrared light, improving the accuracy of measurement data, and preventing them from corroding or damaging the infrared spectrum sensor, thereby extending the service life of the infrared spectrum sensor, reducing the failure and replacement frequency of infrared spectrum sensors caused by pollution, and reducing long-term maintenance costs.

[0008] Furthermore, the cleaning component includes a rotating disk rotatably connected to the inside of a fixed ring, a plurality of tooth blocks are evenly fixedly connected to the top surface of the inner wall of the rotating disk, a connecting ring is fixedly connected to the bottom of the rotating disk, a plurality of cleaning brushes are evenly fixedly connected to the inner wall of the connecting ring, the plurality of cleaning brushes are all in contact with the sensor probe, and a driving member is provided on the top of the fixed ring.

[0009] By adopting the above technical solution, the operation of the driving member can drive the cleaning brush to rotate continuously. Since multiple cleaning brushes are in contact with the sensor probe, the continuously rotating cleaning brush can effectively remove dust, particulate matter and other contaminants attached to the surface of the sensor probe, thereby reducing the absorption and scattering of infrared light, improving the accuracy of measurement data, and preventing them from corroding or damaging the infrared spectrum sensor, thereby extending the service life of the infrared spectrum sensor.

[0010] Furthermore, the driving member includes a fixing plate fixedly connected to the top of the fixing ring, a micro motor is fixedly connected to the top of one end of the fixing plate, a gear is rotatably connected to the bottom of one end of the fixing plate, an output end of the micro motor is fixedly connected to the gear, and the gear is meshingly connected to a plurality of gear blocks.

[0011] By adopting the above technical solution, the micro motor is started to drive the gear at the bottom to rotate. Since the gear is meshed with multiple tooth blocks, when the gear rotates, it will drive the rotating disk to rotate together through cooperation with the multiple tooth blocks. As the rotating disk continues to rotate, the connecting ring and the internal cleaning brush will rotate together.

[0012] Furthermore, a plurality of protrusions are symmetrically and evenly fixedly connected to the outer wall of the connecting ring, and a plurality of linkage parts are evenly arranged on the inner wall of the fixing ring.

[0013] By adopting the above technical solution, as the connecting ring rotates continuously, the multiple protrusions on the outer wall will be driven to rotate together. In this way, the internal cleaning brush is continuously shaken through the linkage part, so that the debris adhering to the surface is shaken off as much as possible through vibration, so as to improve the cleanliness of the cleaning brush as much as possible, so that the cleaning brush can clean the sensor probe for a long time.

[0014] Furthermore, the plurality of linkage parts include two fixed blocks uniformly fixedly connected to the inner wall of the fixed ring, the interiors of the two fixed blocks are slidably connected with sliders, one ends of the two sliders are fixedly connected to a limiting plate, the limiting plate is slidably connected in the fixed blocks, and the ends of the two sliders away from the limiting plate are fixedly connected to a connecting plate.

[0015] By adopting the above technical solution, through the continuous operation of the connecting ring and the protrusion 1, the connecting plate can continuously and stably impact the connecting ring, thereby continuously shaking the internal cleaning brush, so that the debris adhering to the surface of the brush can be shaken off as much as possible through vibration.

[0016] Furthermore, two springs are fixedly connected inside the two fixed blocks, and one end of the two springs away from the inner wall of the fixed block is fixedly connected to one side of the limit plate. The two sliding blocks are symmetrically fixedly connected to two protrusions 2 on one side away from the limit plate, and the two protrusions 2 are on the same horizontal line and fit with the protrusion 1.

[0017] By adopting the above technical solution, since the protrusion 2 and the protrusion 1 are on the same horizontal line and fit together, when multiple protrusions 1 rotate, they will continue to fit and collide with the upper and lower protrusions 2. The extrusion force generated by the continuous impact will drive the slider to squeeze into the interior of the fixed block.

[0018] Furthermore, a rubber plate is fixedly connected to a side of the connecting plate away from the sliding block, and a side of the rubber plate away from the connecting plate is in contact with an outer wall of the connecting ring.

[0019] By adopting the above technical solution, the impact force between the connecting plate and the connecting ring can be effectively mitigated through the elastic protection of the rubber plate, thereby increasing the service life of the connecting ring.

[0020] Furthermore, the gear and the plurality of gear blocks are coated with a galvanized film.

[0021] By adopting the above technical solution, the galvanized film coated on the gear and multiple tooth blocks can effectively improve the rust and corrosion resistance of both, thereby increasing the service life of both.

[0022] In summary, the present application includes at least one of the following beneficial effects: 1. The present application is provided with a cleaning component, which is started to operate by an external controller. The cleaning component can remove dust, particulate matter and other contaminants attached to the surface of the sensor probe, thereby reducing the absorption and scattering of infrared light, improving the accuracy of measurement data, and preventing them from corroding or damaging the infrared spectrum sensor, thereby extending the service life of the infrared spectrum sensor, reducing the failure and replacement frequency of the infrared spectrum sensor due to pollution, and reducing long-term maintenance costs.

[0023] 2. The present application is provided with a linkage part. As the connecting ring continues to rotate, it will drive multiple protrusions on the outer wall to rotate together, so it will continue to fit and collide with the upper and lower protrusions, thereby driving the connecting plate and the rubber plate to collide with the outer wall of the connecting ring, so as to continuously shake the internal cleaning brush, so that the debris adhering to the surface can be shaken off as much as possible through vibration, so as to maximize the cleanliness of the cleaning brush, so that the cleaning brush can clean the sensor probe for a long time.

[0024] 3. This application is provided with an infrared spectrum sensor and a sensor probe. Through the cooperation of the infrared spectrum sensor and the sensor probe, the transmittance or absorptivity of infrared light of a specific wavelength in SF6 gas can be measured to indirectly determine the trace water content. The monitoring results are transmitted to an external controller in real time and then presented on a display screen, so that the staff can accurately understand the situation of SF6 gas and ensure the safe and stable operation of electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0026] Figure 2 It is a schematic diagram of the internal structure of the device body in this application.

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the cleaning component in this application.

[0028] Figure 4 is an exploded view of the cleaning components in this application.

[0029] Figure 5 It is a three-dimensional structural schematic diagram of the linkage parts in this application.

[0030] Description of reference numerals: 1. Detection chamber; 2. Air inlet; 3. Connecting port; 4. Flange; 5. Infrared spectrum sensor; 6. Sensing probe; 7. Sealing door; 8. Support block; 9. Fixed ring; 10. Rotating disk; 11. Gear block; 12. Connecting ring; 13. Cleaning brush; 14. Fixed plate; 15. Micro motor; 16. Gear; 17. Bump 1; 18. Fixed block; 19. Slider; 20. Limiting plate; 21. Spring; 22. Connecting plate; 23. Bump 2; 24. Rubber plate. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 —5 Provide further details of this application.

[0032] The embodiment of the present application discloses an online monitoring device for monitoring the micro-water density of SF6.

[0033] Reference Figure 1 , Figure 2 and Figure 3 , an online monitoring device for monitoring SF6 micro-water density, comprising a detection chamber 1, one side of the detection chamber 1 is fixedly connected with an air inlet 2, the other side of the detection chamber 1 is fixedly connected with a connection port 3, one end of the air inlet 2 and the connection port 3 are fixedly connected with a flange 4, the top of the detection chamber 1 is fixedly connected with an infrared spectrum sensor 5, the bottom of the infrared spectrum sensor 5 is fixedly connected with a sensor probe 6, the sensor probe 6 is located inside the detection chamber 1, a sealing door 7 is provided on one side of the detection chamber 1, two support blocks 8 are fixedly connected to the inner top surface of the detection chamber 1, the opposite surfaces of the two support blocks 8 are fixedly connected with a fixing ring 9, a cleaning component is installed inside the fixing ring 9, the sensor probe 6 is located inside the fixing ring 9, and the infrared spectrum sensor 5 is electrically connected to an external controller.

[0034] When in use, first connect the electrical equipment containing SF6 gas to the air inlet 2 through the pipeline, and then connect the air pressure detection instrument to the connection port 3. At this time, the SF6 gas inside the electrical equipment will circulate in the detection chamber 1 through the air inlet 2, and then the infrared spectrum sensor 5 can be used to monitor the micro-water density of the gas inside the detection chamber 1 in real time. Through the cooperation of the infrared spectrum sensor 5 and the sensor probe 6, when the SF6 gas molecules absorb infrared light of a specific wavelength, the light intensity will be weakened. This change can be detected by the infrared detector and converted into corresponding concentration information through the signal processing circuit to measure the transmittance or absorption rate of infrared light of a specific wavelength in SF6 gas, so as to indirectly determine the micro-water content, and transmit the monitoring results to the external controller in real time, and then present them on the display screen, so that the staff can accurately understand The condition of SF6 gas ensures the safe and stable operation of electrical equipment. Secondly, during the long-term monitoring process, there may be dust, particulate matter and other pollutants in the SF6 gas environment, and the gas will contain a certain amount of moisture. These pollutants may adhere to the sensor probe 6 after contacting with moisture, affecting its absorption and emission of infrared light, thereby interfering with the accurate measurement of micro-water content and density. Therefore, the cleaning component can be started through an external controller to operate. The cleaning component can remove dust, particulate matter and other pollutants attached to the surface of the sensor probe 6, thereby reducing the absorption and scattering of infrared light, improving the accuracy of the measurement data, and preventing them from corroding or damaging the infrared spectrum sensor 5, thereby extending the service life of the infrared spectrum sensor 5, reducing the failure and replacement frequency of the infrared spectrum sensor 5 caused by pollution, and reducing long-term maintenance costs.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The cleaning component includes a rotating disk 10 rotatably connected to the inside of the fixed ring 9, a plurality of tooth blocks 11 are evenly fixedly connected to the top surface of the inner wall of the rotating disk 10, a connecting ring 12 is fixedly connected to the bottom of the rotating disk 10, a plurality of cleaning brushes 13 are evenly fixedly connected to the inner wall of the connecting ring 12, and the plurality of cleaning brushes 13 are all in contact with the sensing probe 6. A driving member is provided on the top of the fixed ring 9, and the driving member includes a fixed plate 14 fixedly connected to the top of the fixed ring 9, a micro motor 15 is fixedly connected to the top of one end of the fixed plate 14, a gear 16 is rotatably connected to the bottom of one end of the fixed plate 14, and an output end of the micro motor 15 is fixedly connected to the gear 16, and the gear 16 is meshed with the plurality of tooth blocks 11.

[0036] When in use, first start the micro motor 15 to drive the gear 16 at the bottom to rotate. Since the gear 16 is meshed with the multiple tooth blocks 11, when the gear 16 rotates, it will drive the rotating disk 10 to rotate together through the cooperation with the multiple tooth blocks 11. As the rotating disk 10 continues to rotate, the connecting ring 12 and the internal cleaning brush 13 will rotate together. Since the multiple cleaning brushes 13 are all disconnected from the sensor probe 6, the continuously rotating cleaning brush 13 can effectively remove dust, particulate matter and other contaminants attached to the surface of the sensor probe 6, thereby reducing the absorption and scattering of infrared light, improving the accuracy of measurement data, and preventing them from corroding or damaging the infrared spectrum sensor 5, thereby extending the service life of the infrared spectrum sensor 5, reducing the failure and replacement frequency of the infrared spectrum sensor 5 caused by pollution, and reducing long-term maintenance costs.

[0037] Reference Figure 3 , Figure 4 and Figure 5 , a plurality of protrusions 17 are symmetrically and evenly fixedly connected on the outer wall of the connecting ring 12, and a plurality of linkage parts are evenly arranged on the inner wall of the fixing ring 9, and the plurality of linkage parts include two fixed blocks 18 evenly fixedly connected to the inner wall of the fixing ring 9, and the insides of the two fixed blocks 18 are slidably connected with sliders 19, one end of the two sliders 19 are fixedly connected to the limiting plate 20, and the limiting plate 20 is slidably connected in the fixing block 18, and the ends of the two sliders 19 away from the limiting plate 20 are fixedly connected to the connecting plate 22, and the insides of the two fixing blocks 18 are fixedly connected with two springs 21, and the ends of the two springs 21 away from the inner wall of the fixing block 18 are fixedly connected to one side of the limiting plate 20, and the two sliders 19 are symmetrically fixedly connected to two protrusions 23 on the side away from the limiting plate 20, and the two protrusions 23 are on the same horizontal line and fit with the protrusion 17, and the side of the connecting plate 22 away from the slider 19 is fixedly connected with a rubber plate 24, and the side of the rubber plate 24 away from the connecting plate 22 fits with the outer wall of the connecting ring 12.

[0038] When in use, as the connecting ring 12 continues to rotate, the multiple protrusions 17 on the outer wall will be driven to rotate together, and because the protrusion 23 and the protrusion 17 are on the same horizontal line and fit together, when the multiple protrusions 17 rotate, they will continue to fit and collide with the upper and lower protrusions 23. The extrusion force generated by the continuous collision will drive the slider 19 to squeeze into the interior of the fixed block 18 and squeeze the internal spring 21 to shrink. As the connecting ring 12 continues to rotate, the multiple protrusions 17 and the protrusions 23 will intermittently fit and separate in a dislocated manner. When the protrusion 17 is separated from the protrusion 23, the rebound of the spring 21 will pull the slider 19 out of the fixed block 18. The fixing block 18 is pushed out from the inside, thereby driving the connecting plate 22 and the rubber plate 24 to collide with the outer wall of the connecting ring 12. Through the continuous operation of the connecting ring 12 and the protrusion 17, the connecting plate 22 and the rubber plate 24 can continuously and stably collide with the connecting ring 12, thereby continuously shaking the internal cleaning brush 13, so that the debris adhering to the surface of the cleaning brush 13 can be shaken off as much as possible through vibration, so as to maximize the cleanliness of the cleaning brush 13, so that the cleaning brush 13 can clean the sensor probe 6 for a long time, and through the elastic protection of the rubber plate 24, the impact force between the connecting plate 22 and the connecting ring 12 can be effectively reduced, thereby improving the service life of the connecting ring 12.

[0039] Reference Figure 2 and Figure 3 The gear 16 and the plurality of tooth blocks 11 are coated with a galvanized film.

[0040] When in use, the galvanized film coated on the gear 16 and the plurality of tooth blocks 11 can effectively improve the rust and corrosion resistance of both, thereby increasing the service life of both.

[0041] The implementation principle of an online monitoring device for monitoring SF6 micro-water density in this embodiment is as follows: when in use, firstly, the electrical equipment containing SF6 gas is connected to the air inlet 2 through a pipeline, and then the air pressure detection instrument is connected to the connection port 3. At this time, the SF6 gas inside the electrical equipment will circulate in the detection chamber 1 through the air inlet 2, and then the infrared spectrum sensor 5 can be used to monitor the micro-water density of the gas inside the detection chamber 1 in real time. The infrared spectrum sensor 5 and the sensor probe 6 can be used to measure the transmittance or absorption rate of infrared light of a specific wavelength in the SF6 gas to indirectly determine the micro-water content, and the monitoring results are transmitted to the external controller in real time, and then presented on the display screen, so that the staff can accurately understand the situation of the SF6 gas and ensure the safe and stable operation of the electrical equipment. Secondly, during the long-term monitoring process, there may be dust, particulate matter and other pollutants in the SF6 gas environment, and the gas will contain a certain amount of water. After these pollutants come into contact with the water, It may adhere to the sensor probe 6, affecting its absorption and emission of infrared light, thereby interfering with the accurate measurement of micro-water content and density. Therefore, the micro motor 15 can be started by an external controller to drive the gear 16 at the bottom to rotate. Since the gear 16 is meshed with the multiple tooth blocks 11, when the gear 16 rotates, it will drive the rotating disk 10 to rotate together through the cooperation with the multiple tooth blocks 11. As the rotating disk 10 continues to rotate, the connecting ring 12 and the internal cleaning brush 13 will rotate together. Since the multiple cleaning brushes 13 are all disconnected from the sensor probe 6, the continuously rotating cleaning brush 13 can effectively remove dust, particulate matter and other pollutants attached to the surface of the sensor probe 6, thereby reducing the absorption and scattering of infrared light, improving the accuracy of the measurement data, and preventing them from corroding or damaging the infrared spectrum sensor 5, thereby extending the service life of the infrared spectrum sensor 5, reducing the failure and replacement frequency of the infrared spectrum sensor 5 caused by pollution, and reducing the long-term maintenance cost; In addition, as the connecting ring 12 continues to rotate, the multiple protrusions 17 on the outer wall will be driven to rotate together, and because the protrusion 23 and the protrusion 17 are on the same horizontal line and fit together, when the multiple protrusions 17 rotate, they will continue to fit and collide with the upper and lower protrusions 23. The extrusion force generated by the continuous collision will drive the slider 19 to squeeze into the interior of the fixed block 18 and squeeze the internal spring 21 to shrink. As the connecting ring 12 continues to rotate, the multiple protrusions 17 and the protrusions 23 will intermittently fit and separate from each other. When the protrusion 17 is separated from the protrusion 23, the slider 19 will be pushed out from the interior of the fixed block 18 by the rebound of the spring 21, thereby driving the connecting plate 22 and the rubber plate 24 to contact the connecting plate 18. The outer wall of the connecting ring 12 collides and resists, and the continuous operation of the connecting ring 12 and the protrusion 17 will make the connecting plate 22 and the rubber plate 24 can continuously and stably impact the connecting ring 12, so as to continuously shake the internal cleaning brush 13, so that the debris adhering to the surface can be shaken off as much as possible through vibration, so as to maximize the cleanliness of the cleaning brush 13, so that the cleaning brush 13 can clean the sensor probe 6 for a long time, and through the elastic protection of the rubber plate 24, the impact force between the connecting plate 22 and the connecting ring 12 can be effectively reduced, thereby improving the service life of the connecting ring 12. Secondly, through the galvanized film coated on the gear 16 and the multiple tooth blocks 11, the rust and corrosion resistance of the two can be effectively improved, thereby improving the service life of the two.

Claims

1. An online monitoring device for monitoring SF6 micro-water density, comprising a detection chamber (1), characterized in that: An air inlet (2) is fixedly connected to one side of the detection chamber (1), a connecting port (3) is fixedly connected to the other side of the detection chamber (1), a flange (4) is fixedly connected to one end of each of the air inlet (2) and the connecting port (3), an infrared spectrum sensor (5) is fixedly connected to the top of the detection chamber (1), a sensing probe (6) is fixedly connected to the bottom of the infrared spectrum sensor (5), the sensing probe (6) is located inside the detection chamber (1), a sealing door (7) is provided on one side of the detection chamber (1), two supporting blocks (8) are fixedly connected to the top surface of the interior of the detection chamber (1), a fixing ring (9) is fixedly connected to the opposite surfaces of the two supporting blocks (8), a cleaning component is installed inside the fixing ring (9), and the sensing probe (6) is located inside the fixing ring (9).

2. The online monitoring device for monitoring SF6 micro-water density according to claim 1, characterized in that: The cleaning component comprises a rotating disk (10) rotatably connected to the inside of a fixed ring (9); a plurality of tooth blocks (11) are evenly fixedly connected to the top surface of the inner wall of the rotating disk (10); a connecting ring (12) is fixedly connected to the bottom of the rotating disk (10); a plurality of cleaning brushes (13) are evenly fixedly connected to the inner wall of the connecting ring (12); the plurality of cleaning brushes (13) are all in contact with the sensor probe (6); and a driving member is provided on the top of the fixed ring (9).

3. The online monitoring device for monitoring SF6 micro-water density according to claim 2 is characterized in that: The driving member comprises a fixing plate (14) fixedly connected to the top of the fixing ring (9); a micro motor (15) is fixedly connected to the top of one end of the fixing plate (14); a gear (16) is rotatably connected to the bottom of one end of the fixing plate (14); an output end of the micro motor (15) is fixedly connected to the gear (16); and the gear (16) is meshingly connected to a plurality of gear blocks (11).

4. The online monitoring device for monitoring SF6 micro-water density according to claim 2 is characterized in that: A plurality of protrusions (17) are symmetrically and evenly fixedly connected to the outer wall of the connecting ring (12), and a plurality of linkage parts are evenly arranged on the inner wall of the fixing ring (9).

5. The online monitoring device for monitoring SF6 micro-water density according to claim 4 is characterized in that: The plurality of linkage members include two fixed blocks (18) uniformly fixedly connected to the inner wall of the fixed ring (9), the interiors of the two fixed blocks (18) are slidably connected with a slider (19), one end of the two sliders (19) are fixedly connected to a limit plate (20), the limit plate (20) is slidably connected in the fixed block (18), and one end of the two sliders (19) away from the limit plate (20) is fixedly connected to a connecting plate (22).

6. The online monitoring device for monitoring SF6 micro-water density according to claim 5, characterized in that: The two fixing blocks (18) are fixedly connected to the inside with two springs (21), and the ends of the two springs (21) away from the inner wall of the fixing blocks (18) are fixedly connected to one side of the limit plate (20). The two sliding blocks (19) are symmetrically fixedly connected to the sides away from the limit plate (20) with two second protrusions (23), and the two second protrusions (23) are on the same horizontal line as the first protrusion (17) and fit in with each other.

7. The online monitoring device for monitoring SF6 micro-water density according to claim 5, characterized in that: A rubber plate (24) is fixedly connected to the side of the connecting plate (22) away from the sliding block (19), and a side of the rubber plate (24) away from the connecting plate (22) is in contact with the outer wall of the connecting ring (12).

8. The online monitoring device for monitoring SF6 micro-water density according to claim 3 is characterized in that: The gear (16) and the plurality of gear blocks (11) are all coated with a galvanized film.

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