A high-precision anti-interference GIS micro-water online monitoring device

Abstract

The application discloses a high-precision anti-interference GIS micro-water online monitoring device, which comprises a shell, a shock-absorbing and buffering mechanism, an isolation and protection mechanism, a gas passage mechanism, a sealing mechanism and a mounting mechanism; the shock-absorbing and buffering mechanism is arranged in the interior of the shell and is used for buffering and absorbing the gas pressure impact in the interior of a GIS gas chamber; and the shock-absorbing and buffering mechanism comprises a shock-absorbing seat, shock-absorbing springs, a shock-absorbing sheet group, a sealing cavity and a buffer air bag. The device has the beneficial effects that the micro-water content and the gas pressure condition can be long-term, stable and real-time monitored in the complex environment in the interior of the GIS gas chamber; the multiple synergistic effects of the isolation and protection mechanism, the shock-absorbing and buffering mechanism and the sealing mechanism can effectively block the erosion of micro-water to the sensor, disperse the effect of the gas pressure impact on the sensing element, and guarantee the sealing performance of the whole device, thereby improving the anti-interference capability of the sensor in the complex gas chamber environment, ensuring the monitoring precision and the stability of long-term operation of the monitoring system.

Description

Technical Field

[0001] This invention relates to the field of power equipment condition monitoring technology, and in particular to a high-precision, anti-interference GIS micro-water online monitoring device. Background Technology

[0002] GIS moisture monitoring is a core technology for supervising the insulation of power substation equipment. It primarily targets and controls the trace moisture content in the SF6 insulating gas inside GIS switchgear, and is a critical maintenance project for ensuring the safe and stable operation of high-voltage and ultra-high-voltage GIS equipment. SF6 gas is the core insulation and arc-extinguishing medium of GIS equipment; its internal moisture content directly determines the equipment's insulation performance, arc-extinguishing capability, and service life. Excessive moisture content can trigger a series of equipment hazards, seriously threatening the safety of power grid operation.

[0003] Excessive moisture inside GIS equipment poses a significant hazard. When the moisture content inside the gas chamber is too high, condensation will occur on the inner wall of the basin-type insulator under low-temperature conditions, leading to surface flashover, insulation breakdown, and other faults. Simultaneously, the moisture will react chemically with the SF6 arc decomposition products, generating corrosive substances such as hydrogen fluoride, which corrodes the equipment contacts, metal casing, and sealing structures, causing equipment leaks and component aging and damage. Furthermore, excessive moisture will significantly weaken the insulation and arc-quenching properties of SF6 gas, and in extreme cases, can cause major electrical accidents such as internal short circuits and equipment explosions within the GIS system.

[0004] With the development of smart grids, online real-time monitoring has become the mainstream operation and maintenance solution. This system consists of micro-moisture sensors, temperature and pressure acquisition terminals, a data gateway, and a back-end monitoring platform. Utilizing technologies such as resistive-capacitive sensing, laser spectroscopy, and online cold mirrors, it can collect real-time data on micro-moisture, temperature, and pressure from each independent gas chamber. Through automatic temperature and pressure compensation to correct data errors, it accurately captures trends in micro-moisture content changes. The system features over-limit graded alarms, historical data storage, and trend analysis functions, enabling real-time detection of hidden moisture hazards such as seal leaks, adsorbent failure, and incomplete vacuuming.

[0005] Current online monitoring systems typically consist of micro-moisture sensors, pressure sensors, data acquisition terminals, and a back-end monitoring platform. They enable real-time acquisition of micro-moisture content, temperature, and pressure in each independent air chamber, along with over-limit alarm functions. However, in practical applications, micro-moisture sensors and pressure sensors operate under prolonged exposure to the internal environment of GIS air chambers, continuously enduring micro-moisture erosion and the impact of pressure changes. Under these conditions, the sensor probe surface is susceptible to the influence of micro-moisture chemical composition, and the periodic fluctuations in pressure exert a continuous effect on the sensing elements, potentially leading to a certain degree of performance degradation. This, in turn, affects the accuracy of monitoring data and the long-term stability of the monitoring system. Improving the sensors' anti-interference capabilities in complex air chamber environments and ensuring the long-term stability of monitoring accuracy are areas that require further improvement in current GIS online micro-moisture monitoring technology. Summary of the Invention

[0006] This invention provides a high-precision, anti-interference online monitoring device for micro-moisture in GIS, which can perform long-term, stable, real-time monitoring of micro-moisture content and air pressure in the complex environment inside a GIS air chamber. Through the synergistic effect of multiple mechanisms, including isolation and protection, shock absorption and buffering, and sealing, it effectively blocks the erosion of micro-moisture on the sensor, disperses the impact of air pressure on the sensing element, and ensures the overall sealing performance of the device. This enhances the sensor's anti-interference capability in complex air chamber environments and ensures monitoring accuracy and the long-term stability of the monitoring system.

[0007] The objective of this invention is achieved through the following technical solution: a high-precision, anti-interference GIS micro-water online monitoring device, comprising a housing, a shock-absorbing and buffering mechanism, an isolation and protection mechanism, a gas channel mechanism, a sealing mechanism, and an installation mechanism, wherein: The shock absorption mechanism is located inside the shell and is used to buffer and absorb the air pressure impact inside the GIS chamber. The shock absorption mechanism includes a shock absorber seat, shock absorber springs, shock absorber plate group, sealing cavity and buffer airbag. The shock absorber seat is slidably connected to the inner wall of the shell. Multiple shock absorber springs are evenly fixedly connected between the outer wall of the shock absorber seat and the inner wall of the shell. The shock absorber plate group is fixedly connected to the outer wall of the shock absorber seat and located between adjacent shock absorber springs. The sealing cavity is opened inside the shock absorber seat and the buffer airbag is fixedly connected to the inner wall of the sealing cavity.

[0008] An isolation and protection mechanism is located on top of the shock absorber base and is used to isolate and protect the micro water sensor and the air pressure sensor. The isolation and protection mechanism includes a protective frame, an isolation layer, an isolation sleeve, and an isolation plate. The protective frame is fixedly connected to the top of the shock absorber base. The isolation layer is coated on the inner wall of the protective frame. The isolation sleeve is fixedly connected to the inside of the protective frame and is located inside the isolation layer. The isolation plate is fixedly connected to the inside of the protective frame and isolates the isolation sleeve from the external space.

[0009] The gas channel mechanism is located on the outer wall of the housing and is used to guide the SF6 gas inside the GIS gas chamber to flow evenly through the sensor measurement area. The gas channel mechanism includes a collecting ring, gas channels and a flow guiding mechanism. The collecting ring is fixedly connected to the outer wall of the housing. Multiple gas channels are opened on the outer wall of the housing and are respectively connected to the collecting ring. The flow guiding mechanism is located inside the collecting ring.

[0010] The sealing mechanism is located at the connection points of each mechanism to ensure the overall airtightness of the device. The sealing mechanism includes a first sealing ring, a second sealing ring, and an auxiliary sealing ring. The first sealing ring is fixedly connected between the isolation and protection mechanism and the shock absorber. The second sealing ring is fixedly connected between the gas channel mechanism and the housing. The auxiliary sealing ring is fixedly connected between the outer wall of the protective frame and the inner wall of the shock absorber.

[0011] The mounting mechanism is located at the bottom of the housing and is used to fix the device to the air chamber wall of the GIS equipment. The mounting mechanism includes a mounting flange and a positioning mechanism. The mounting flange is fixedly connected to the bottom of the housing, and the positioning mechanism is located on the outer wall of the mounting flange.

[0012] Optionally, the shock absorption mechanism further includes a guide sleeve and a guide rod. The guide sleeve is fixedly connected to the inner wall of the housing and located above the shock absorber seat. The guide rod is fixedly connected to the outer wall of the shock absorber seat and slidably connected to the guide sleeve. The shock absorber assembly includes multiple shock absorbers, which are arranged in a stacked manner and fixedly connected to the outer wall of the shock absorber seat. Shock absorber pads are fixedly connected between adjacent shock absorbers. The buffer airbag is filled with inert gas, and the buffer airbag is made of fluororubber.

[0013] Optionally, the isolation layer is a polytetrafluoroethylene (PTFE) anti-corrosion coating with a thickness of 0.5 mm to 1 mm. The isolation sleeve is made of ceramic or silicon carbide, and multiple heat-conducting fins are fixedly connected to the outer wall of the isolation sleeve. The isolation protection mechanism also includes a protective cover and a mounting bracket. The protective cover is fixedly connected to the top of the protective frame, and the mounting bracket is fixedly connected to the outer wall of the protective frame.

[0014] Optionally, four mounting brackets are used, each fixedly connected to one of the four corners of the outer wall of the protective frame. The gas passage mechanism also includes guide plates and a flow regulating valve. The guide plates are fixedly connected inside the collecting ring and located at the inlet of the gas passage, while the flow regulating valve is fixedly connected to the inner wall of the gas passage. Multiple guide plates are used, arranged at an angle inside the collecting ring, with an angle between adjacent guide plates ranging from 30 to 60 degrees. A filter layer is fixedly connected to the inner wall of the collecting ring to filter the SF6 gas entering the gas passage.

[0015] Optionally, the sealing mechanism also includes a sealing plate and a clamping spring. The sealing plate is fixedly connected to the outside of each sealing ring, and the clamping spring is fixedly connected between the sealing plate and the adjacent fixed component. Both the first and second sealing rings are made of high-elasticity rubber, which is resistant to SF6 gas corrosion and hydrogen fluoride corrosion. The mounting mechanism also includes a positioning ring and a positioning pin. The positioning ring is fixedly connected to the inner wall of the mounting flange, and the positioning pin is fixedly connected to the outer wall of the positioning ring. The outer wall of the mounting flange has mounting through holes, with multiple mounting through holes evenly distributed around the outer ring of the mounting flange.

[0016] Optionally, the mounting mechanism also includes a sealing gasket, which is fixedly connected to the bottom of the mounting flange and located between the mounting flange and the air chamber wall of the GIS equipment. A signal cable interface is fixedly connected to the outer wall of the housing, and the signal cable interface is connected to the sensor signal output terminal inside the isolation and protection mechanism. A signal shielding sleeve, made of stainless steel braided mesh, is fixedly connected to the outer wall of the signal cable interface.

[0017] The housing is made of stainless steel or titanium alloy, and the inner wall of the housing is coated with an anti-corrosion coating. The shock absorber base and the protective frame are fixed together by bolts. The top of the shock absorber base has mounting holes, and the bottom of the protective frame has connecting flanges corresponding to the mounting holes.

[0018] This invention has the following advantages: This high-precision, anti-interference GIS micro-water online monitoring device, through the setting of a shock-absorbing mechanism, can effectively buffer and absorb the impact of periodic fluctuations in air pressure inside the GIS gas chamber. During actual operation, changes in air pressure inside the GIS gas chamber will continuously impact the sensor. The multi-layered structure of the shock-absorbing springs and shock-absorbing plates can buffer the air pressure impact step by step. The buffer airbag deforms under the air pressure impact to absorb energy, thereby reducing the intensity of the air pressure impact transmitted to the sensor probe, preventing performance degradation or structural damage to the sensor due to air pressure impact, and effectively improving the working stability of the device in complex air pressure environments.

[0019] By setting up an isolation and protection mechanism, the probes of the micro-water sensor and the barometric pressure sensor can be effectively isolated and protected. During the operation of GIS equipment, internal micro-water will react chemically with the SF6 arc decomposition products to generate corrosive substances such as hydrogen fluoride. The isolation layer is coated with a polytetrafluoroethylene (PTFE) anti-corrosion coating on the inner wall of the protective frame. PTFE has excellent chemical stability and corrosion resistance, which can effectively prevent corrosive substances such as hydrogen fluoride from directly contacting the sensor probes. The isolation sleeve is made of ceramic or silicon carbide materials. Ceramic materials have high hardness and high wear resistance, which can provide physical protection for the sensor's sensitive elements. The isolation plate further isolates the sensor from the external environment, forming a multi-layered protective structure, effectively extending the service life of the sensor probes.

[0020] By setting up a gas channel mechanism, SF6 gas inside the GIS gas chamber can be guided to flow evenly across the sensor measurement area. The design of the flow collecting ring and gas channel makes the distribution of SF6 gas entering the device more uniform. The inclined arrangement of the guide plates guides the gas to flow across the sensor surface at a specific angle, preventing water droplets from condensing on the sensor probe surface. At the same time, the design of the guide plates makes the gas flow velocity distribution more uniform, improving the accuracy and stability of water droplet measurement. The filter layer performs preliminary filtration of the SF6 gas entering the gas channel, removing impurities and preventing impurities from interfering with sensor measurements.

[0021] By incorporating a sealing mechanism, a reliable seal between the entire device and the GIS gas chamber can be ensured. The first and second sealing rings are made of highly elastic rubber material, which has excellent resistance to SF6 gas corrosion and hydrogen fluoride corrosion. It can maintain a good sealing effect for a long time in complex gas chamber environments. The multi-point distribution of the auxiliary sealing rings forms a multi-layer sealing structure, effectively preventing external micro-water from seeping into the device and affecting the sensor's measurement accuracy. The multi-layer sealing structure design significantly improves the overall sealing reliability of the device and can maintain stable airtight performance during long-term operation.

[0022] By setting up an installation mechanism, the device can be stably and reliably fixed to the air chamber wall of the GIS equipment. The matching design of the mounting flange and positioning mechanism facilitates the installation and positioning of the device. The setting of the sealing gasket further enhances the sealing effect between the device and the air chamber wall. The design of the signal cable interface and signal shielding sleeve ensures the stability and anti-interference ability of the sensor signal transmission. The housing is made of stainless steel or titanium alloy, which has excellent strength and corrosion resistance, and can work stably for a long time in the harsh environment inside the GIS air chamber.

[0023] This high-precision, anti-interference GIS micro-moisture online monitoring device achieves high-precision micro-moisture and air pressure monitoring even in the complex environment inside a GIS gas chamber through the coordinated operation of shock-absorbing, buffering, isolation, gas channel, sealing, and installation mechanisms. The shock-absorbing mechanism effectively absorbs the impact of air pressure on the sensor; the isolation mechanism effectively blocks the erosion of the sensor probe by the chemical components of micro-moisture; the sealing mechanism effectively prevents external micro-moisture from seeping in and affecting measurement accuracy; and the gas channel mechanism guides the gas to flow evenly through the measurement area, improving measurement accuracy. The cooperation of these mechanisms enhances the overall anti-interference capability of the device, enabling it to maintain high-precision monitoring performance for extended periods in complex gas chamber environments, effectively ensuring the safe and stable operation of GIS equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a partial cross-sectional schematic diagram of the isolation and protection mechanism of the present invention; Figure 3 For the present invention Figure 1 Enlarged schematic diagram of structure A in the middle; Figure 4 This is a top view schematic diagram of the shock-absorbing seat structure of the present invention.

[0025] In the diagram, 1. Shell; 2. Shock absorption and buffer mechanism; 201. Shock absorber seat; 202. Shock absorber spring; 203. Shock absorber plate assembly; 204. Sealing cavity; 205. Buffer airbag; 206. Guide sleeve; 207. Guide rod; 208. Shock absorber pad; 3. Isolation and protection mechanism; 301. Protective frame; 302. Isolation layer; 303. Isolation sleeve; 304. Isolation plate; 305. Protective cover plate; 306. Mounting bracket; 307. Heat-conducting plate; 4. Gas channel mechanism; 401. Collector ring; 402. Gas... 403. Flow guiding mechanism; 404. Flow guide plate; 405. Flow regulating valve; 406. Filter layer; 5. Sealing mechanism; 501. First sealing ring; 502. Second sealing ring; 503. Auxiliary sealing ring; 504. Sealing pressure plate; 505. Compression spring; 6. Mounting mechanism; 601. Mounting flange; 602. Positioning mechanism; 603. Positioning ring; 604. Positioning pin; 605. Mounting through hole; 606. Sealing gasket; 7. Signal cable interface; 8. Signal shielding sleeve; 9. Anti-corrosion coating. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] like Figures 1-4 As shown, a high-precision, anti-interference GIS micro-moisture online monitoring device is provided in this embodiment of the invention. This device is applied to scenarios where real-time monitoring of micro-moisture content and air pressure is performed inside a GIS air chamber. Figure 1 As shown, the high-precision anti-interference GIS micro-water online monitoring device of the present invention mainly includes a shell 1, a shock-absorbing buffer mechanism 2, an isolation and protection mechanism 3, a gas channel mechanism 4, a sealing mechanism 5, and an installation mechanism 6. The mechanisms cooperate with each other to achieve high-precision monitoring of micro-water content and gas pressure.

[0033] The housing 1 is the main structure of this invention, and its material is stainless steel or titanium alloy. The inner wall of the housing 1 is coated with an anti-corrosion coating 9, which is made of epoxy resin-based anti-corrosion material and can effectively block the corrosion of the inner wall of the housing 1 by SF6 gas and its decomposition products inside the GIS gas chamber. A signal cable interface 7 is fixedly connected to the outer wall of the housing 1. The signal cable interface 7 is connected to the sensor signal output terminal inside the isolation and protection mechanism 3, and is used to transmit the signal collected by the sensor to external monitoring equipment. A signal shielding sleeve 8 is fixedly connected to the outer wall of the signal cable interface 7. The signal shielding sleeve 8 is made of stainless steel braided mesh, which can effectively shield external electromagnetic interference and ensure the stability of sensor signal transmission.

[0034] The shock absorption mechanism 2 is located inside the housing 1 and is used to buffer and absorb the air pressure impact inside the GIS air chamber. The shock absorption mechanism 2 includes a shock absorber seat 201, a shock absorber spring 202, a shock absorber plate assembly 203, a sealing cavity 204, and a buffer airbag 205.

[0035] The shock absorber 20 is slidably connected to the inner wall of the housing 1. An installation hole is provided at the top of the shock absorber 201. The shock absorber 201 is fixedly connected to the protective frame 301 by bolts. Multiple shock absorber springs 202 are evenly fixedly connected between the outer wall of the shock absorber 201 and the inner wall of the housing 1. The shock absorber springs 202 are made of high-quality spring steel, and their elastic coefficient is designed and selected according to the amplitude of air pressure fluctuations inside the GIS chamber. A shock absorber plate assembly 203 is fixedly connected to the outer wall of the shock absorber 201 and located between adjacent shock absorber springs 202. The shock absorber plate assembly 203 includes multiple shock absorber plates, which are arranged in a stacked manner and fixedly connected to the outer wall of the shock absorber 201. A shock absorber pad 208 is fixedly connected between adjacent shock absorber plates. The shock absorber pad 208 is made of high-damping rubber material and can absorb energy when the shock absorber plate deforms.

[0036] A sealing cavity 204 is formed inside the shock absorber 201, and its shape is designed according to the expansion space requirements of the buffer airbag 205. The buffer airbag 205 is fixedly connected to the inner wall of the sealing cavity 204. The buffer airbag 205 is filled with inert gas and is made of fluororubber. Fluororubber has excellent resistance to SF6 gas corrosion and hydrogen fluoride corrosion, and can work stably for a long time in the corrosive environment inside the GIS gas chamber.

[0037] The shock absorption and buffer mechanism 2 also includes a guide sleeve 206 and a guide rod 207. The guide sleeve 206 is fixedly connected to the inner wall of the housing 1 and located above the shock absorber seat 201. The guide rod 207 is fixedly connected to the outer wall of the shock absorber seat 201 and is slidably connected to the guide sleeve 206. The cooperation between the guide sleeve 206 and the guide rod 207 can guide and limit the up and down movement of the shock absorber seat 201, preventing the shock absorber seat 201 from shifting or tilting under the action of air pressure impact, and ensuring the straightness and stability of the movement of the shock absorber seat 201.

[0038] The isolation and protection mechanism 3 is located on top of the shock absorber 201 and is used to isolate and protect the micro water sensor and the air pressure sensor. The isolation and protection mechanism 3 includes a protective frame 301, an isolation layer 302, an isolation sleeve 303, and an isolation plate 304.

[0039] The protective frame 301 is fixedly connected to the top of the shock absorber 201. The bottom of the protective frame 301 has a connecting flange corresponding to the mounting holes on the top of the shock absorber 201. The protective frame 301 is fixedly connected to the shock absorber 201 by bolts. An isolation layer 302 is coated on the inner wall of the protective frame 301. The isolation layer 302 is a polytetrafluoroethylene (PTFE) anti-corrosion coating. PTFE material has excellent chemical stability and corrosion resistance, effectively preventing direct contact between corrosive substances such as hydrogen fluoride and the sensor probe.

[0040] The isolation sleeve 303 is fixedly connected inside the protective frame 301 and located inside the isolation layer 302. The isolation sleeve 303 is made of ceramic or silicon carbide material. Ceramic material has high hardness and high wear resistance, which can provide physical protection for the sensor's sensitive element. Multiple heat-conducting plates 307 are fixedly connected to the outer wall of the isolation sleeve 303. The heat-conducting plates 307 are made of aluminum alloy material. Their arrangement can accelerate the dissipation of heat during sensor operation and prevent the sensor from affecting measurement accuracy due to overheating.

[0041] An isolation plate 304 is fixedly connected inside the protective frame 301 and isolates the isolation sleeve 303 from the external space. The isolation plate 304 is made of stainless steel, and its installation further isolates the sensor from the external environment, forming a multi-layered protective structure. The isolation and protection mechanism 3 also includes a protective cover plate 305 and mounting brackets 306. The protective cover plate 305 is fixedly connected to the top of the protective frame 301 to seal and protect the top of the protective frame 301. Four mounting brackets 306 are fixedly connected to the four corners of the outer wall of the protective frame 301. The mounting brackets 306 facilitate the fixed support of the protective frame 301, enhancing the stability of the overall structure.

[0042] The gas channel mechanism 4 is located on the outer wall of the housing 1 and is used to guide the SF6 gas inside the GIS gas chamber to flow evenly through the sensor measurement area. The gas channel mechanism 4 includes a flow collecting ring 401, a gas channel 402, and a flow guiding mechanism 403.

[0043] A collecting ring 401 is fixedly connected to the outer wall of the housing 1. The collecting ring 401 has an annular cross-sectional shape, and a filter layer 406 is fixedly connected to its inner wall. The filter layer 406 is made of microporous filter material and is used to filter the SF6 gas entering the gas channel 402, removing impurity particles and preventing impurities from interfering with sensor measurements. Multiple gas channels 402 are opened on the outer wall of the housing 1 and are respectively connected to the collecting ring 401. A guide plate 404 is fixedly connected to the inlet of the gas channel 402. Multiple guide plates 404 are arranged in an inclined manner inside the collecting ring 401, with an angle between adjacent guide plates 404 of 30 to 60 degrees. The inclined arrangement of the guide plates 404 guides the gas to flow over the sensor surface at a specific angle, preventing water droplets from condensing on the sensor probe surface and making the gas flow rate distribution more uniform. A flow regulating valve 405 is fixedly connected to the inner wall of the gas channel 402. The flow regulating valve 405 is used to regulate the flow rate of SF6 gas entering the device.

[0044] The flow guiding mechanism 403 is located inside the flow collecting ring 401. The flow guiding mechanism 403 includes multiple flow guiding plates 404 and a flow regulating valve 405. The flow guiding plates 404 guide the gas to flow through the sensor measurement area in a laminar flow state. The flow regulating valve 405 adjusts the gas flow rate according to the monitoring requirements.

[0045] The sealing mechanism 5 is located at the connection points of each mechanism to ensure the overall airtightness of the device. The sealing mechanism 5 includes a first sealing ring 501, a second sealing ring 502, and an auxiliary sealing ring 503. The first sealing ring 501 is fixedly connected between the isolation and protection mechanism 3 and the shock absorber 201. The second sealing ring 502 is fixedly connected between the gas channel mechanism 4 and the housing 1. The auxiliary sealing ring 503 is fixedly connected to the outer wall of the protective frame 301.

[0046] The first sealing ring 501 and the second sealing ring 502 are both made of high-elasticity rubber material. This high-elasticity rubber material is resistant to SF6 gas corrosion and hydrogen fluoride corrosion, enabling it to maintain a good sealing effect over a long period in complex gas chamber environments. The sealing mechanism 5 also includes a sealing pressure plate 504, which is fixedly connected to the outside of each sealing ring. The sealing pressure plate 504 is designed to exert a continuous clamping force on the sealing rings, ensuring the long-term stability of the sealing effect.

[0047] The mounting mechanism 6 is located at the bottom of the housing 1 and is used to fix the device to the air chamber wall of the GIS equipment. The mounting mechanism 6 includes a mounting flange 601 and a positioning mechanism 602. The mounting flange 601 is fixedly connected to the bottom of the housing 1, and a sealing gasket 606 is fixedly connected to the bottom of the mounting flange 601. The sealing gasket 606 is located between the mounting flange 601 and the air chamber wall of the GIS equipment to enhance the sealing effect between the device and the air chamber wall. The positioning mechanism 602 is located on the outer wall of the mounting flange 601 and includes a positioning ring 603 and a positioning pin 604. The positioning ring 603 is fixedly connected to the inner wall of the mounting flange 601, and the positioning pin 604 is fixedly connected to the outer wall of the positioning ring 603. The positioning pin 604 cooperates with the positioning hole on the air chamber wall of the GIS equipment to achieve rapid positioning and installation of the device. The outer wall of the mounting flange 601 has mounting through holes 605. Multiple mounting through holes 605 are evenly distributed on the outer ring of the mounting flange 601. Fixing bolts are installed in the mounting through holes 605, and the device is fixedly installed on the air chamber wall of the GIS equipment by fixing bolts.

[0048] The working process of this invention is as follows: After the device is installed, the SF6 gas inside the GIS gas chamber enters the gas channel 402 through the collector ring 401. The guide plate 404 guides the gas to flow evenly through the sensor measurement area at a specific angle. The filter layer 406 filters impurity particles in the gas. The micro-water sensor and the gas pressure sensor are set inside the isolation sleeve 303. The isolation layer 302 is coated with a polytetrafluoroethylene anti-corrosion coating on the inner wall of the protective frame 301. The polytetrafluoroethylene material effectively blocks corrosive substances such as hydrogen fluoride from direct contact with the sensor probe. The isolation sleeve 303 is made of ceramic or silicon carbide material to provide physical protection for the sensor sensitive element. The isolation plate 304 further isolates the sensor from the external environment to form a multi-layer protective structure.

[0049] When the air pressure inside the GIS chamber fluctuates periodically, the pressure impact acts on the housing 1 and the damping seat 201. The damping spring 202 and the damping plate assembly 203 first buffer the pressure impact in stages, and the damping pad 208 absorbs some energy under the action of the high-damping rubber material. The buffer airbag 205 deforms inside the sealed cavity 204 with the air pressure change, further absorbing the energy of the pressure impact and reducing the intensity of the pressure impact transmitted to the sensor probe. The guide sleeve 206 and the guide rod 207 cooperate to guide and limit the up and down movement of the damping seat 201, ensuring the stability of the damping movement.

[0050] The first sealing ring 501, the second sealing ring 502, and the auxiliary sealing ring 503 are made of highly elastic rubber material, which maintains a good sealing effect for a long time in complex air chamber environments. The combination of the sealing pressure plate 504 and the compression spring 505 generates a continuous compression force on the sealing ring, ensuring the long-term stability of the sealing effect and preventing external micro-water from seeping into the device and affecting the sensor measurement accuracy.

[0051] The moisture content and air pressure signals collected by the sensor are transmitted to external monitoring equipment through the signal cable interface 7. The signal shielding sleeve 8 is made of stainless steel braided mesh material, which effectively shields external electromagnetic interference and ensures the stability of sensor signal transmission. The housing 1 is made of stainless steel or titanium alloy material, which has excellent strength and corrosion resistance. The anti-corrosion coating 9 is made of epoxy resin anti-corrosion material, which can work stably for a long time in the harsh environment inside the GIS air chamber.

[0052] The high-precision, anti-interference GIS micro-water online monitoring device of this invention achieves high-precision micro-water and air pressure monitoring in the complex environment inside a GIS gas chamber through the coordinated operation of a shock-absorbing buffer mechanism 2, an isolation and protection mechanism 3, a gas channel mechanism 4, a sealing mechanism 5, and an installation mechanism 6. The shock-absorbing buffer mechanism 2 effectively absorbs the impact of air pressure on the sensor; the isolation and protection mechanism 3 effectively blocks the erosion of the sensor probe by the chemical components of micro-water; the sealing mechanism 5 effectively prevents external micro-water from seeping in and affecting measurement accuracy; and the gas channel mechanism 4 guides the gas to flow evenly through the measurement area, improving measurement accuracy. The cooperation of these mechanisms enhances the overall anti-interference capability of the device, enabling it to maintain high-precision monitoring performance for extended periods in complex gas chamber environments.

[0053] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision, anti-interference GIS micro-water online monitoring device, comprising a housing (1), a shock-absorbing and buffering mechanism (2), an isolation and protection mechanism (3), a gas channel mechanism (4), a sealing mechanism (5), and an installation mechanism (6), characterized in that: The shock absorption mechanism (2) is located inside the housing (1) and is used to absorb the air pressure impact inside the GIS chamber. The shock absorption mechanism (2) includes a shock absorber seat (201), a shock absorber spring (202), a shock absorber plate group (203), a sealing cavity (204), and a buffer airbag (205). The shock absorber seat (201) is slidably connected to the inner wall of the housing (1). Multiple shock absorber springs (202) are uniformly fixedly connected between the outer wall of the shock absorber seat (201) and the inner wall of the housing (1). The shock absorber plate group (203) is fixedly connected to the outer wall of the shock absorber seat (201) and located between adjacent shock absorber springs (202). The sealing cavity (204) is opened inside the shock absorber seat (201). The buffer airbag (205) is fixedly connected to the inner wall of the sealing cavity (204). The isolation and protection mechanism (3) is located on the top of the shock absorber (201) and is used to isolate and protect the micro water sensor and the air pressure sensor. The isolation and protection mechanism (3) includes a protective frame (301), an isolation layer (302), an isolation sleeve (303) and an isolation plate (304). The protective frame (301) is fixedly connected to the top of the shock absorber (201). The isolation layer (302) is coated on the inner wall of the protective frame (301). The isolation sleeve (303) is fixedly connected to the inside of the protective frame (301) and located inside the isolation layer (302). The isolation plate (304) is fixedly connected to the inside of the protective frame (301) and isolates the isolation sleeve (303) from the external space. The gas channel mechanism (4) is located on the outer wall of the housing (1) and is used to guide the SF6 gas inside the GIS gas chamber to flow uniformly through the sensor measurement area. The gas channel mechanism (4) includes a collecting ring (401), a gas channel (402) and a flow guiding mechanism (403). The collecting ring (401) is fixedly connected to the outer wall of the housing (1). Multiple gas channels (402) are opened on the outer wall of the housing (1) and are respectively connected to the collecting ring (401). The flow guiding mechanism (403) is located inside the collecting ring (401). The sealing mechanism (5) is located at the connection points of each mechanism to ensure the airtightness of the entire device. The sealing mechanism (5) includes a first sealing ring (501), a second sealing ring (502) and an auxiliary sealing ring (503). The first sealing ring (501) is fixedly connected between the isolation and protection mechanism (3) and the shock absorber (201). The second sealing ring (502) is fixedly connected between the gas channel mechanism (4) and the housing (1). The auxiliary sealing ring (503) is fixedly connected between the outer wall of the protective frame (301) and the inner wall of the shock absorber (201). The installation mechanism (6) is located at the bottom of the housing (1) and is used to fix the device on the air chamber wall of the GIS equipment. The installation mechanism (6) includes an installation flange (601) and a positioning mechanism (602). The installation flange (601) is fixedly connected to the bottom of the housing (1), and the positioning mechanism (602) is located on the outer wall of the installation flange (601).

2. The high-precision anti-interference GIS micro-water online monitoring device according to claim 1, characterized in that: The shock absorption mechanism (2) further includes a guide sleeve (206) and a guide rod (207). The guide sleeve (206) is fixedly connected to the inner wall of the housing (1) and located above the shock absorber seat (201). The guide rod (207) is fixedly connected to the outer wall of the shock absorber seat (201) and is slidably connected to the guide sleeve (206).

3. The high-precision anti-interference GIS micro-water online monitoring device according to claim 1, characterized in that: The damping pad group (203) includes multiple damping pads, which are stacked and fixedly connected to the outer wall of the damping seat (201). Damping pads (208) are fixedly connected between adjacent damping pads.

4. The high-precision anti-interference GIS micro-water online monitoring device according to claim 1, characterized in that: The isolation layer (302) is a polytetrafluoroethylene anti-corrosion coating with a thickness of 0.5 mm to 1 mm; the isolation sleeve (303) is made of ceramic or silicon carbide material, and multiple heat-conducting plates (307) are fixedly connected to the outer wall of the isolation sleeve (303).

5. The high-precision anti-interference GIS micro-water online monitoring device according to claim 1, characterized in that: The isolation and protection mechanism (3) also includes a protective cover plate (305) and a mounting bracket (306). The protective cover plate (305) is fixedly connected to the top of the protective frame (301). There are four mounting brackets (306), which are respectively fixedly connected to the four corners of the outer wall of the protective frame (301).

6. The high-precision anti-interference GIS micro-water online monitoring device according to claim 1, characterized in that: The gas channel mechanism (4) further includes a guide plate (404) and a flow regulating valve (405). The multiple guide plates (404) are fixedly connected to the inlet of the gas channel (402) and are arranged in an inclined manner inside the collecting ring (401). The angle between adjacent guide plates (404) is 30 to 60 degrees. The multiple flow regulating valves (405) are respectively fixedly connected to the inner wall of each gas channel (402).

7. The high-precision anti-interference GIS micro-water online monitoring device according to claim 1, characterized in that: The sealing mechanism (5) further includes a sealing pressure plate (504) and a compression spring (505). The sealing pressure plate (504) is fixedly connected to the outside of each of the sealing rings, and the compression spring (505) is fixedly connected between the sealing pressure plate (504) and the adjacent fixed component. The first sealing ring (501) and the second sealing ring (502) are both made of high elastic rubber material.

8. The high-precision anti-interference GIS micro-water online monitoring device according to claim 1, characterized in that: The installation mechanism (6) further includes a positioning ring (603) and a positioning pin (604). The positioning ring (603) is fixedly connected to the inner wall of the mounting flange (601), and the positioning pin (604) is fixedly connected to the outer wall of the positioning ring (603). The outer wall of the mounting flange (601) is provided with a mounting through hole (605), and a plurality of mounting through holes (605) are evenly distributed on the outer ring of the mounting flange (601). The installation mechanism (6) further includes a sealing gasket (606), which is fixedly connected to the bottom of the mounting flange (601) and located between the mounting flange (601) and the air chamber wall of the GIS equipment.

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