A diagnostic test apparatus for GIS equipment

Abstract

The application discloses a kind of diagnostic test equipment for GIS equipment, belong to GIS technical field.It includes shell, shell outside is equipped with pickup and voiceprint intelligent analysis terminal, shell inside is equipped with multiple electrical equipment, SF6 gas is filled into shell, gas leakage detector is equipped on shell, for detecting SF density and sending alarm signal, voiceprint intelligent analysis terminal collects fault voiceprint sample, obtains the voiceprint signal under each working condition of GIS equipment, compares sample and fault voiceprint sample to identify whether fault.The protection assembly of the present application blocks impurities through the corrugated protection part, the cleaning assembly is inflated to fit the shell by air bag, combined with the forward and reverse rotation of rotary motor and the movement of horizontal motor, completely scrape off impurities, avoid its hinder heat dissipation or accelerate flange place insulation piece aging.Flexible cleaning layer solves the accumulation of impurities on the top, and the air bag is inflated to form a ring-shaped sealing band.

Description

Technical Field

[0001] This invention relates to the field of GIS technology, and more particularly to a diagnostic testing device for GIS equipment. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) is a key piece of equipment in modern power systems, and its reliability directly affects the safe operation of the power grid. GIS achieves compact design and high reliability by integrating high-voltage components such as circuit breakers, disconnectors, and busbars into a metal casing filled with SF6 gas. The circuit breaker, as the core component, relies on SF6 gas for arc extinguishing, and its moving and stationary contacts are operated by an actuating mechanism for opening and closing. Disconnectors and grounding switches are used for power isolation or grounding protection during maintenance. The busbar, as the energy distribution carrier, is sealed together with current / voltage transformers within the gas-filled casing. While this fully enclosed structure offers advantages such as small footprint and maintenance-free operation, it also makes internal condition monitoring difficult, and traditional detection methods have significant limitations.

[0003] Currently, GIS faults mainly include mechanical faults, insulation faults, and gas leaks. Mechanical faults are mostly caused by wear of operating mechanism components (such as broken springs or hydraulic leaks) or loose connections (such as loose busbar contact bolts). Under short-circuit electrodynamic forces or long-term vibration, they may further lead to poor contact, partial discharge, or even insulation breakdown. Existing monitoring technologies, such as partial discharge detection, are affected by the acoustic attenuation of SF6 gas; infrared thermography can only detect existing hot spots; and gas density monitoring cannot locate the leak source. These methods are not sensitive to early mechanical faults, while actual operational data shows that more than 60% of GIS faults can be predicted in advance through vibration acoustic characteristics.

[0004] Voiceprint diagnostic technology offers a new approach to solving this problem. The frequency band of GIS mechanical vibration (100-2000Hz) is highly matched with the bone conduction frequency response (50-4000Hz) of voiceprint pickups; for example, the energy of the 125Hz component can be increased by 15dB during abnormal tripping of a circuit breaker. Existing research uses a fusion model of Mel-frequency cepstral coefficients (MFCC) and convolutional neural networks (CNN) to achieve an accuracy of 92.3% in identifying faults such as contact wear, which is 29% higher than traditional methods.

[0005] In addition, during the use of GIS equipment, impurities will adhere to the surface of the casing, which will hinder the convection heat exchange with the outside air. In particular, when impurities accumulate at the connection between the casing and the flange, they will also accelerate the aging of the insulation components at the flange connection and cause SF6 gas leakage.

[0006] Furthermore, traditional monitoring systems lack emergency response capabilities. From leak detection to manual intervention, an average of two hours elapses. During this time, the SF6 leakage may exceed environmental limits, and the inability to effectively contain the SF6 gas in a timely manner leads to continuous deterioration of insulation performance and potentially triggers a major accident. Particularly in high-voltage GIS equipment, SF6 gas leaks not only reduce the insulation strength of the equipment, but its decomposition products (such as HF and SO2) are also highly corrosive, potentially further damaging internal components. This passive fault handling mode is ill-suited to the real-time monitoring and control requirements of modern smart grids. Summary of the Invention

[0007] The purpose of this invention is to address the problem that the passive handling mode for gas leaks in GIS in the existing technology cannot meet the urgent need for real-time control of equipment status in modern smart grids, and to propose a diagnostic testing device for GIS equipment.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A diagnostic testing device for GIS equipment includes a housing, with a microphone and a voiceprint intelligent analysis terminal disposed on the outer side of the housing.

[0010] The housing contains various electrical devices. The housing is filled with SF6 gas. A gas leak detector is installed on the housing to detect the SF6 density and issue an alarm signal. The gas leak detector is a pressure and temperature compensated density relay. The density relay is located at the gas chamber valve and detects the SF6 density through a pressure sensor and a temperature probe.

[0011] The intelligent voiceprint analysis terminal pre-collects fault voiceprint samples, obtains voiceprint signals of GIS equipment in various working states, compares the samples with fault voiceprint samples, and identifies whether there is a fault.

[0012] It also includes a method for diagnosing the voiceprint of GIS equipment, comprising the following steps:

[0013] S1. By collecting acoustic fingerprint samples of mechanical faults of various GIS equipment, an acoustic fingerprint feature model library is established to obtain acoustic fingerprint signals of GIS equipment under various working conditions.

[0014] S2 uses Convolutional Neural Network (CNN) voiceprint recognition technology to process the signal, compares the sample with the fault model library, and quickly identifies whether a fault has occurred.

[0015] S3, combined with deep learning to continuously improve the fault database, the trained algorithm engine can accurately identify the fault types of hydraulic mechanisms, energy storage motors and spring devices of large GIS equipment.

[0016] Voiceprint feature extraction includes the following steps:

[0017] S11 First, the voiceprint signal is preprocessed, including pre-emphasis, framing, and windowing operations, to improve signal quality and facilitate subsequent analysis.

[0018] S12, Next, the signal is converted from the time domain to the frequency domain by discrete Fourier transform, and then a set of Mel filter banks is used to filter the spectrum to simulate the human ear's perception characteristics of different frequencies of sound.

[0019] S13, then take the logarithm of the filtered result to highlight the amplitude change of the signal, and finally perform discrete cosine transform to obtain MFCC coefficients. These coefficients can effectively capture the spectral envelope features of the voiceprint signal, are sensitive to the timbre and formant characteristics of the sound, and can well characterize the unique attributes of different voiceprints, thereby extracting the voiceprint features of GIS equipment in various working states.

[0020] In some embodiments, the microphone and voiceprint intelligent analysis terminal have multiple microphones, each corresponding to a plurality of electrical devices disposed within the housing. The microphones are magnetically attached to the housing, eliminating the need for drilling.

[0021] In some embodiments, the device further includes a protective component and a support frame disposed on the outside of the housing. The protective component includes a fixing part and a corrugated protective part. The corrugated protective part is provided with a cleaning component for cleaning the surface of the housing.

[0022] The cleaning assembly includes a drive unit and a ring seat, which is rotatably connected to the corrugated protective unit. The inner side of the ring seat is provided with an inflatable and deflated airbag for fitting the outer shell.

[0023] The support frame is equipped with a horizontal moving component, which is used to drive the cleaning component to move horizontally.

[0024] In some embodiments, the drive unit includes a rotating motor, a gear, and a limiting strip and a rack located on the outer side of the ring seat. The gear and rack mesh to drive the ring seat and the airbag to rotate in both directions, and the airbag scrapes and cleans the surface of the outer shell. A baffle is provided on the inner side of the ring seat to limit the direction of airbag expansion. The airbag inlet is connected to an air pump through an air inlet pipe for inflating and deflating the airbag.

[0025] In some embodiments, the horizontal movement assembly drives the ring seat and airbag to move horizontally, thereby increasing the cleaning coverage of the airbag over the housing.

[0026] In some embodiments, when the gas leak detector detects a gas leak, the airbag inflates to form an annular sealing strip to block the SF6 gas leak path.

[0027] In some embodiments, a pressure sensor is provided on the inner side of the ring seat to detect the pressure value in the space between the airbag and the ring seat, and to determine the location of SF6 gas leakage.

[0028] In some embodiments, a flexible cleaning layer is provided on the outer side of the top of the airbag for cleaning the impurity layer on the front side of the top of the airbag in the direction of movement.

[0029] In some embodiments, the airbag is provided with an exhaust pipe, the exhaust pipe is provided with a solenoid valve, the outer surface of the outer shell is provided with two magnetic adsorption rings, the middle part of the airbag is provided with an electromagnet, the electromagnet is located in the recess of the middle part of the airbag, and the electromagnet and the magnetic adsorption rings cooperate to connect the middle part of the airbag with the outer shell.

[0030] In some embodiments, the two airbags expand and contract synchronously, blowing the gas in the sealed cavity inside the airbag downwards through the air outlet to clean impurities carried at the bottom of the flexible cleaning layer; the exhaust pipe is detachably and sealed to the flexible cleaning layer to discharge and collect the gas in the sealed cavity.

[0031] Compared with the prior art, the present invention provides a diagnostic testing device for GIS equipment, which has the following beneficial effects.

[0032] 1. This invention uses a high-sensitivity microphone on the outside of the casing to collect voiceprint signals without penetrating the casing and interfering with the normal operation of the GIS equipment. The microphone uses a patch-type magnetic mounting (no drilling required) and combines bone conduction mode and dynamic noise reduction technology to effectively shield external noise and collect only the noise from the target device, ensuring signal purity. The intelligent voiceprint analysis terminal uses deep learning algorithms (such as CNN) and MFCC feature extraction technology to establish a dynamically updated fault model library, which can quickly identify various faults such as hydraulic mechanisms and energy storage motors, and the diagnostic accuracy continues to improve with the accumulation of samples.

[0033] 2. In this invention, the protective component blocks external impurities through a corrugated protective section and is equipped with a cleaning component to achieve automatic cleaning of the outer shell. After the airbag is inflated, it adheres to the surface of the outer shell. Combined with the forward and reverse rotation of the rotary motor and the movement drive of the horizontal motor, it can thoroughly scrape away impurities from the outer shell surface, preventing impurities from accumulating and hindering heat dissipation or accelerating the aging of insulation components at the flange. The flexible cleaning layer further solves the problem of impurity accumulation at the top. The airflow generated by the inflation and deflation of the airbag achieves self-cleaning, preventing impurities from affecting the sealing effect and maintaining the cleanliness of the outer shell over the long term.

[0034] 3. In this invention, when the gas leak detector alarms, the cleaning assembly can quickly move to the flange, forming an annular sealing strip through the inflation of two sets of airbags, sealing the leak point between the airbags and significantly reducing the amount of SF6 gas leaking out. Simultaneously, the pressure sensor inside the ring seat can pinpoint the specific leak location, facilitating accurate troubleshooting by maintenance personnel in conjunction with the audible and visual alarm. For leaked harmful gases (such as SF6 decomposition products), a negative pressure device can be connected to the exhaust pipe for centralized suction and treatment, avoiding personnel contact or air pollution, thus balancing safety and environmental protection.

[0035] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the front side of the outer casing of the present invention.

[0037] Figure 2 This is a schematic diagram of the structure of the microphone and voiceprint intelligent analysis terminal of the present invention.

[0038] Figure 3 This is a schematic diagram of the microphone and voiceprint intelligent analysis terminal of the present invention.

[0039] Figure 4 This is a schematic diagram of the overall architecture of the microphone and voiceprint intelligent analysis terminal of the present invention.

[0040] Figure 5 This is a schematic diagram of the internal busbar structure of the GIS of this invention.

[0041] Figure 6 This is a schematic diagram of the structure of the protective component of the present invention.

[0042] Figure 7 For the present invention Figure 6 A schematic diagram of a local part of the structure.

[0043] Figure 8 This is a schematic diagram of the internal structure of the motor housing of the present invention.

[0044] Figure 9 For the present invention Figure 8 Enlarged structural diagram of area A in the middle.

[0045] Figure 10 This is a schematic diagram of the connection between the air pump and the airbag of the present invention.

[0046] Figure 11 This is a schematic diagram of the connection between the slide and the limiting plate of the present invention.

[0047] Figure 12This is a schematic diagram of the internal structure of the ring seat of the present invention.

[0048] Figure 13 This is a schematic diagram of the electromagnet of the present invention.

[0049] Figure 14 For the present invention Figure 13 A magnified structural diagram of region B in the middle.

[0050] Figure 15 This is a schematic diagram of the air outlet of the present invention.

[0051] Figure 16 This is a schematic diagram of the internal structure of the flexible cleaning layer of the present invention.

[0052] Figure 17 This is a schematic diagram of the structure of the rear side of the outer casing of the present invention.

[0053] Figure 18 This is a schematic diagram of the sliding structure of the limiting plate and the slide rail of the present invention.

[0054] Figure 19 This is a schematic diagram of the GIS circuit breaker structure of the present invention.

[0055] Figure 20 This is a schematic diagram of the signal waveform, spectrum analysis, and spectrogram of the present invention.

[0056] Figure 21 This is a flowchart of the voiceprint recognition technology of the present invention.

[0057] In the picture:

[0058] 1. Housing; 101. Basin-type insulator; 102. Busbar contact; 103. Shielding cover; 104. Busbar; 105. Basin-type insulator flange; 2. Microphone and voiceprint intelligent analysis terminal; 3. Protective components; 301. Corrugated protection section; 3011. Mounting plate; 4. Support frame; 401. Slide rail; 402. Horizontal motor; 403. Threaded shaft; 404. Internal threaded plate; 5. Cleaning components; 501. Limiting support frame; 5011. Limiting plate; 5012. Curved plate; 502. Ring seat; 50 21. Limiting strip; 5022. Rack; 5023. Limiting groove; 5024. Baffle; 50241. Vent hole; 5025. Movable cavity; 6. Drive unit; 601. Motor housing; 602. Rotating motor; 6021. Gear; 603. Gear groove; 604. Limiting groove; 7. Airbag; 701. Inlet pipe; 702. Air pump; 703. Flexible cleaning layer; 7031. Air outlet; 7032. Inner cavity; 704. Electromagnet; 9. Exhaust pipe; 901. Solenoid valve; 902. Check valve. Detailed Implementation

[0059] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0060] Example 1

[0061] Reference Figure 1-21 A diagnostic testing device for GIS equipment includes a housing 1, inside which various electrical devices are installed. These electrical devices include circuit breakers, busbars 104, transformers, grounding switches, surge arresters, disconnect switches, current transformers, and voltage transformers, etc.; the housing 1 is filled with SF6 gas at a certain pressure.

[0062] The outer casing 1 is equipped with a basin-type insulator 101, a busbar contact 102, a shield 103, a busbar 104, and a basin-type insulator flange 105.

[0063] The basin-type insulator flange 105 fixes the basin-type insulator 101 to the outer shell 1 and grounds it at the same potential as the outer shell 1; a busbar 104 passes through the center of the basin-type insulator 101, a busbar contact 102 is fixed on the busbar 104, and a shield 103 is installed over the busbar contact 102; the busbar 104, the busbar contact 102 and the shield 103 are electrically isolated from the outer shell 1 through the basin-type insulator 101.

[0064] The outer side of the housing 1 is provided with a microphone and a voiceprint intelligent analysis terminal 2. The microphone and the voiceprint intelligent analysis terminal 2 have multiple microphones, and the multiple microphones correspond to multiple electrical devices installed inside the housing 1.

[0065] Alternatively, the microphone can be mounted magnetically, eliminating the need for drilling. It can highly sensitively collect noise data under various operating conditions of the device. Through bone conduction mode, it can effectively shield external noise and only collect the noise of the corresponding main device. The microphone and voiceprint intelligent analysis terminal 2 are waterproof, and the data is transmitted via wired connection.

[0066] The microphone features built-in AGC and ALC adaptive dynamic noise reduction circuitry, ATDA dynamic noise suppression technology, and a high-speed voice ATC processing unit, offering advantages such as high sensitivity and fidelity. Connecting to a voiceprint intelligent analysis terminal, the microphone records noise in real-time, creating a noise file which is then processed locally before being uploaded to the voiceprint intelligent analysis terminal.

[0067] Acquiring voiceprint signals does not require intrusion into the housing 1 and does not affect the working status of any device inside the housing 1.

[0068] The intelligent voiceprint analysis terminal includes embedded edge computing software. It features a built-in CMFMC3.0 voiceprint analysis engine, supporting various fault identification methods. It integrates Ethernet, HDMI, WIFI, Bluetooth, port, and 4G communication capabilities, and can create private voiceprint model libraries for different scenarios and devices, intelligently monitoring the operating status of devices within the enclosure. The terminal is explosion-proof and waterproof, and wall-mounted installation is available as needed. It includes a built-in PCI-E 4G interface, supporting various PCI-E 4G modules from companies like Quectel and others; it also offers rich expansion interfaces. Through the built-in CMFMC3.0 industrial voiceprint engine, it can create private voiceprint model libraries for different scenarios and devices, intelligently monitoring device operating status. The local voiceprint engine can analyze multiple audio streams and determine the presence of abnormal sounds based on preset thresholds. Voiceprint files are stored locally for three months. Fault information and real-time alarms can be output via HTTP / MQTT protocols.

[0069] As a method for voiceprint diagnosis of GIS equipment, it includes the following steps:

[0070] S1. By collecting acoustic fingerprint samples of mechanical faults of various GIS equipment, an acoustic fingerprint feature model library is established to obtain acoustic fingerprint signals of GIS equipment under various working conditions.

[0071] S2 uses Convolutional Neural Network (CNN) voiceprint recognition technology to process signals, compares samples with a fault model library, and quickly identifies whether a fault has occurred.

[0072] S3, by combining deep learning to continuously improve the fault database, can accurately identify various fault types such as abnormalities in hydraulic mechanisms, energy storage motors, and spring devices of large GIS equipment after training.

[0073] Diagnostic Principle: The collected audio data is meticulously labeled, and an algorithmic model separates the characteristic signals for each time period, thereby distinguishing the device's operating sound signature from ambient noise. It eliminates the need to first extract fault features and then analyze fault patterns. Instead, a deep learning neural network unifies sound signature extraction and fault pattern analysis within a single neural network algorithmic model. Through short-term learning of positive samples, it can automatically identify negative samples and trigger an alarm.

[0074] Regarding voiceprint feature extraction, Mel-frequency cepstral coefficient (MFCC) voiceprint feature extraction technology is used. The specific steps are as follows:

[0075] S11 first preprocesses the voiceprint signal, including pre-emphasis, framing, windowing, and other operations, to improve signal quality and facilitate subsequent analysis.

[0076] S12, Next, the signal is converted from the time domain to the frequency domain by discrete Fourier transform, and then a set of Mel filter banks is used to filter the spectrum to simulate the human ear's perception characteristics of different frequencies of sound.

[0077] S13, then take the logarithm of the filtered result to highlight the amplitude changes of the signal, and finally perform discrete cosine transform to obtain MFCC coefficients. These coefficients can effectively capture the spectral envelope features of the voiceprint signal, are sensitive to the timbre, formants and other characteristics of the sound, and can well characterize the unique attributes of different voiceprints, thereby extracting the voiceprint features of GIS equipment in various working states.

[0078] Extraction principle: Spectrogram information, where the horizontal axis represents time and the vertical axis represents frequency. The grayscale value of each pixel reflects the intensity of the corresponding time and frequency.

[0079] Example 2

[0080] During the use of GIS equipment, impurities will adhere to the surface of the outer casing 1. The impurity layer on the outer casing 1 will hinder the convective heat exchange between the outer casing 1 and the outside air. Furthermore, the impurities will accumulate at the connection between the outer casing 1 and the flange, which will also accelerate the aging of the insulation components at the flange connection and cause SF6 gas leakage.

[0081] To address this, a protective component 3 is provided on the outer side of the outer casing 1. The protective component 3 includes a fixing part and a corrugated protective part 301. The fixing part is used to fix and connect to the outer casing 1. A cleaning component 5 is provided on the corrugated protective part 301. The fixing part and the corrugated protective part 301 provide protection for the outer casing 1, and the cleaning component 5 cleans impurities from the surface of the outer casing 1.

[0082] The protective component 3 is provided with a support frame 4 on the outside, and the cleaning component 5 includes a drive unit 6 and a ring seat 502.

[0083] The drive unit 6 includes a motor housing 601. Inside the motor housing 601, there is a rotating motor 602 and a gearbox. The rotating end of the rotating motor 602 is provided with a gear 6021. Inside the motor housing 601, there is a gear groove 603. At the bottom of the gear groove 603, there is a downward-through limiting groove 604.

[0084] The ring seat 502 is rotatably connected to the corrugated protective part 301. A limiting strip 5021 is provided on the outer side of the ring seat 502, and a rack 5022 is provided on the outer side of the limiting strip 5021; the limiting strip 5021 is correspondingly engaged with the limiting groove 604, and the rack 5022 is correspondingly engaged with the gear 6021.

[0085] The inner side of the ring seat 502 is provided with two sets of baffles 5024, each set of baffles 5024 has two baffles, and a sealing groove is formed between two adjacent baffles 5024. An airbag 7 is provided in the sealing groove. An air inlet pipe 701 is provided at the air inlet of the airbag 7. The end of the air inlet pipe 701 away from the airbag 7 passes through the ring seat 502 and is connected to an air pump 702.

[0086] An movable cavity 5025 is provided at the edge of the ring seat 502. The air inlet pipe 701 is a flexible hose, and a compensation section is provided at the corresponding position of the air inlet pipe 701 and the movable cavity 5025.

[0087] Two support frames 4 are provided, and a horizontal moving assembly is provided on the support frame 4. The horizontal moving assembly includes a slide rail 401, and a limiting plate 5011 is slidably connected inside the slide rail 401. A horizontal motor 402, an internal threaded plate 404, and a threaded shaft 403 are provided inside one slide rail 401. The horizontal motor 402 is located at one end of the slide rail 401, and the threaded shaft 403 is located at the rotating end of the horizontal motor 402, passing through the internal threaded hole of the internal threaded plate 404. The internal threaded plate 404 is fixedly connected to the motor housing 601 by the limiting support frame 501. A protective box is provided on the support frame 4. The protective box is used to protect the threaded shaft 403 and the internal threaded plate 404 from stable transmission. The protective box is provided with a door for maintenance of the threaded shaft 403 and the internal threaded plate 404 and for replenishing lubricating grease.

[0088] A limiting groove 5023 is provided on the outer side of the ring seat 502 at a position corresponding to the limiting plate 5011. A curved panel 5012 is movably connected inside the limiting groove 5023, and the middle part of the curved panel 5012 is fixedly connected to the limiting plate 5011.

[0089] The corrugated protective part 301 has mounting plates 3011 at both ends, and the mounting plates 3011 are fixedly connected to the outer casing 1;

[0090] As one way to connect the mounting plate 3011 to the outer casing 1, a mounting plate is provided on the outer casing 1. Both the mounting plate and the mounting plate 3011 are provided with threaded holes. The mounting plate 3011 is installed and fixed by passing a screw through the two threaded holes.

[0091] During use, the housing 1 is protected by the fixing part and the corrugated protection part 301 to deal with external wind and sand impurities. The fixing part and the corrugated protection part 301 are directly installed on the existing GIS equipment without changing the internal electric field and gas sealing system.

[0092] When installing the fixing part and the corrugated protection part 301, first fix the mounting plate upward around the outer shell 1. The mounting plate can be a clamp structure. Threaded holes are pre-set on the mounting plate. Before splicing the multi-section shell components that make up the outer shell 1, first put the fixing part and the corrugated protection part 301 on the shell components.

[0093] Different electrical devices are placed inside a shell 1, which is composed of multiple shell components, and then SF6 gas at a certain pressure is injected into the shell 1.

[0094] Next, a support frame 4 is set on the outside of the protective component 3. When the support frame 4 is fixed, the limiting plates 5011 on both sides of the ring seat 502 are connected to the slide rail 401. The threaded shaft 403 of the transmission end of the horizontal motor 402 passes through the internal threaded hole of the internal thread plate 404 by rotation. Then, the horizontal motor 402 is fixedly installed inside one end of the slide rail 401.

[0095] In the initial state, the airbag 7 is not filled with gas. At this time, the airbag 7 does not block the vent 50241. External gas can form gas convection inside the fixed part and the corrugated protective part 301 through the vent 50241, and the outer shell 1 dissipates heat normally.

[0096] As needed, the controller can periodically control the air pump 702 to inflate the airbag 7, causing the airbag 7 to expand under the limiting action of the sealing groove between two adjacent baffles 5024. Under the limiting action of the sealing groove, the inner side of the airbag 7 is made to fit against the outer surface of the outer shell 1. Then, the controller starts the rotating motor 602. The rotating motor 602 drives the limiting strip 5021, the ring seat 502, and the airbag 7 to rotate back and forth in both directions through the meshing of the gear 6021 and the rack 5022. The inner side of the airbag 7 scrapes and cleans the outer surface of the outer shell 1, removing the adhering substances from the outer shell 1. As the airbag 7 rotates back and forth, impurities on the surface detach from the outer shell 1 and fall off. At the same time, the horizontal motor 402 drives the internal thread plate 404 to slide horizontally along the slide rail 401 via the threaded shaft 403. The limiting groove 604 limits the limiting strip 5021 and the limiting slide groove 5023 limits the curved panel 5012. When the threaded shaft 403 drives the internal thread plate 404 to move horizontally along the slide rail 401, it drives the ring seat 502 to move synchronously. The ring seat 502 compresses and contracts the corrugated protective part 301 in the direction of movement through the rotation of the airbag 7.

[0097] When the airbag 7 rotates to scrape and clean the outer surface of the outer shell 1, the horizontal movement of the ring seat 502 and the airbag 7 increases the coverage of the airbag 7 in the rotating state, thus removing the dust accumulated on the outer shell 1.

[0098] The housing 1 is equipped with a gas leak detector, which can be a pressure and temperature compensated density relay. This density relay can be installed on the gas chamber valve and calculates the SF6 density through a pressure sensor and a temperature probe. When the density drops, an alarm signal is issued.

[0099] When the gas leak detector detects a gas leak in the outer casing 1, the horizontal motor 402 starts, and the threaded engagement of the threaded shaft 403 and the internal threaded plate 404 drives the ring seat 502 to move to the flange position at the connection of the casing assembly. At this time, the two air pumps 702 inflate the airbags 7 in the two sets of baffles 5024 respectively. As the airbags 7 expand, they seal the vent holes 50241 on the baffles 5024. As the airbags 7 continue to expand, they continue to expand radially along the baffles 5024 until they form an interference fit with the cylindrical surface of the outer casing 1. The two airbags 7 form two annular sealing bands on both sides of the flange, completely sealing the flange at the connection of the casing assembly between the two airbags 7, preventing SF6 gas from leaking out further through the airbags 7.

[0100] Normally, each flange at the connection of the housing assembly corresponds to a cleaning assembly 5, and the flange is sealed by two airbags 7 in the cleaning assembly 5.

[0101] Depending on the usage requirements, when multiple housing components are relatively short and the flange distances at the connection points of the housing components are close, multiple cleaning components 5 can be preset on a corrugated protective section 301, with each cleaning component 5 corresponding to a horizontal motor 402. The multiple horizontal motors 402 drive the multiple cleaning components 5 to move horizontally. When the gas leak detector detects a gas leak in the housing 1, multiple ring seats 502 sequentially correspond to multiple flanges, and similarly, two airbags 7 form a seal on the flanges, achieving a timely sealing effect and reducing the amount of SF6 gas leaking outwards.

[0102] Furthermore, a pressure sensor can be installed inside the ring seat 502. The pressure sensor detects the pressure value within the space of the two airbags 7 and the ring seat 502. After the two airbags 7 form a seal on a flange, the sensor inside the ring seat 502 is within the standard threshold. As SF6 gas leaks out through the flange, the pressure inside the ring seat 502 will gradually increase. By monitoring the pressure value change inside the ring seat 502 in real time through the pressure sensor, the location of the SF6 gas leak on the outer shell 1 can be determined. An audible and visual alarm can be installed on each ring seat 502. When the pressure sensor detects an increase in the internal pressure value of a ring seat 502, the audible and visual alarm receives the alarm signal and triggers the alarm, so that maintenance personnel can locate the SF6 gas leak location in time and perform timely maintenance on the flange.

[0103] Understandably, when the gas leak detector detects a gas leak in the outer casing 1, multiple horizontal motors 402 drive multiple ring seats 502 to correspond to multiple flanges one by one. The airbags 7 are filled with gas and tightly fit the outer casing 1 on both sides of the flange. The pressure sensor inside the ring seat 502 detects the pressure value in the space between the two airbags 7 and the ring seat 502. If the pressure value increases within a preset time, it indicates that there is no leak at that flange. This method checks whether there is a leak at the connection of multiple flanges. In this way, the flange at the leak point can be sealed in time in the early stage of SF6 gas leakage through the two airbags 7 and the ring seat 502.

[0104] The data detected by the pressure sensor is transmitted back to the analysis terminal in real time. When the gas leak detector detects a continuous gas leak in the outer casing 1, but the pressure value in the space between the two airbags 7 and the ring seat 502 at the flange corresponding to the leak point no longer increases, it is actively determined that there is a gap between the airbag 7 and the outer casing 1, and the gas leaks to the outside through the gap. At this time, a secondary alarm is triggered by the audible and visual alarm, and the corresponding horizontal motor 402 is linked to finely adjust the axial position of the ring seat 502. At the same time, the air pump 702 increases the inflation pressure of the airbag 7 again, so that the inside of the airbag 7 is further compressed between the outer casing 1 until the pressure sensor reading stabilizes and increases, confirming that the leak has been effectively sealed and ensuring that SF6 gas no longer leaks out.

[0105] Example 3

[0106] This embodiment is a further improvement on the above embodiment. As an optional solution, in actual use, during the reciprocating rotation of the airbag 7 and the horizontal movement of the ring seat 502 and the airbag 7 driven by the horizontal motor 402, threaded shaft 403, and internal threaded plate 404, because the top arc surface of the outer shell 1 tends to be flat, some dust located on the top of the outer shell 1 cannot slide to the sides when the airbag 7 reciprocates, and can only move along with it during the reciprocating rotation of the airbag 7; and during the continuous horizontal movement of the ring seat 502 and the airbag 7 driven by the horizontal motor 402, impurities are repeatedly crushed and... Accumulated between the inner top of the airbag 7 and the top surface of the outer shell 1, a gradually thickening and hardening layer of impurities is formed. This will cause localized high stress concentration between the airbag 7 and the top of the outer shell 1, making the surface of the airbag 7 more susceptible to wear and even scratches from the sharp particles formed by the hardened impurity layer. This will cause the airbag 7 and the surface of the outer shell 1 to lose their interference fit and leak air locally. At the same time, the accumulated hardened impurity layer will hinder the continued movement of the ring seat 502, causing the horizontal motor 402 to stall, the threaded shaft 403 to overload, and even completely disable the cleaning and emergency sealing functions, thus exacerbating the risk of SF6 leakage.

[0107] The following embodiments are provided to solve the above problems:

[0108] A flexible cleaning layer 703 is provided on the airbag 7. In the initial state, the airbag 7 is in a contracted state, and the flexible cleaning layer 703 contracts into the sealing groove formed by the two baffles 5024 as the airbag 7 contracts. When the controller controls the air pump 702 to inflate the airbag 7 at regular intervals, the flexible cleaning layer 703 extends out of the sealing groove as the airbag 7 expands. When the airbag 7 is fully inflated and the inner wall of the airbag 7 is in contact with the outer surface of the outer shell 1, the inner surface of the flexible cleaning layer 703 contacts the outer surface of the outer shell 1. The flexible cleaning layer 703 is located on the outer side of the top of the airbag 7. Therefore, when the rotating motor 602 drives the ring seat 502 and the airbag 7 to rotate back and forth through the rack 5022, the flexible cleaning layer 703 rotates synchronously with the airbag 7 and cleans the impurity layer on the front side of the top of the airbag 7 in the direction of movement.

[0109] To prevent impurities from repeatedly accumulating and compacting between the inner top of the airbag 7 and the top surface of the outer shell 1, thus forming a hardened impurity layer, the conditions for the formation of a hardened impurity layer are eliminated. This prevents the formation of a hardened impurity layer between the airbag 7 and the outer shell 1, thereby eliminating excessively thick impurities on the outer shell 1 or maintaining the thickness of impurities on the outer shell 1 within a controllable range, reducing the excessive impact of excessively thick impurities on the heat dissipation of the outer shell 1. Furthermore, it ensures that the airbag 7 and the outer shell 1 always maintain an interference seal, while ensuring smooth movement of the ring seat 502.

[0110] However, in actual operation, although the scraping action of the flexible cleaning layer 703 can eliminate or avoid excessive accumulation of impurities on the top of the airbag 7 and the top of the outer shell 1, as the flexible cleaning layer 703 is repeatedly used to scrape impurities on the surface of the outer shell 1, a layer of impurities will form on the flexible cleaning layer 703 due to static electricity and other reasons. When the outer shell 1 is cleaned and the airbag 7 is deflated by the air pump 702, the flexible cleaning layer 703 shrinks synchronously with the airbag 7. The flexible cleaning layer 703 comes into close contact with the top of the airbag 7 again, which will transfer the impurity layer on the flexible cleaning layer 703 to the inner side of the top of the airbag 7. When the airbag 7 is inflated by the air pump 702 again, because of the impurity layer on the inner side of the top of the airbag 7, when the inner wall of the airbag 7 comes into contact with the surface of the outer shell 1, a gap may form between the inner side of the top of the airbag 7 and the outer shell 1, causing the gas between the two airbags 7 to leak through the gap, resulting in the recurrence of SF6 micro-leakage.

[0111] To address this, an exhaust pipe 9 is provided on the airbag 7, which passes through the airbag 7. An electromagnetic valve 901 is provided on the exhaust pipe 9. Two magnetic attraction rings are provided on the outer surface of the outer shell 1. An electromagnet 704 is provided in the middle of the airbag 7, and the electromagnet 704 is located in the recess in the middle of the airbag 7.

[0112] During use, after the outer surface of the outer shell 1 is cleaned by the airbags 7 and the flexible cleaning layer 703, the horizontal motor 402 drives the ring seat 502 and the airbags 7 to move horizontally to the preset magnetic adsorption rings via the threaded shaft 403 and the internal threaded plate 404, so that the two airbags 7 correspond to the two magnetic adsorption rings respectively. Then, the air pump 702 inputs air into the airbags 7 through the air inlet pipe 701 to inflate the airbags 7. At this time, by energizing the electromagnet 704 in the middle of the airbag 7, when the inner side of the airbag 7 approaches the magnetic adsorption ring, multiple electromagnets 704 are magnetically attracted to the outer shell 1. The magnetic adsorption ring on the outer surface, after the two airbags 7 are continuously inflated by the air pump 702, tightly adheres to the outer surface of the outer shell 1. At this time, the air pump 702 corresponding to the magnetic adsorption ring repeatedly inflates and deflates the airbags 7, so that the volume of the airbags 7 changes repeatedly under the state of magnetic connection between the inner electromagnet 704 and the magnetic adsorption ring. During the process of volume change of the airbags 7, the inner side of the airbags 7 and the magnetic adsorption ring remain stably connected. The movement amplitude of the bottom of the airbags 7 does not cause gaps between the inner side of the airbags 7 and the outer surface of the outer shell 1, thus preventing gas from entering or leaving through the gap between the airbags 7 and the outer shell 1. Specifically, when the air pump 702 controls the airbag 7 to inflate, the solenoid valve 901 on one of the exhaust pipes 9 remains open, while the solenoid valve 901 on the exhaust pipe 9 of the other airbag 7 remains closed. As the two airbags 7 inflate, the inner part of the airbag 7 continues to expand and comes into close contact with the outer surface of the outer shell 1, thereby reducing the volume of the sealed cavity inside the two airbags 7. At the same time, the gas in the sealed cavity is squeezed through the exhaust pipe 9 and enters the inner cavity 7032, and then blows downward through the air outlet 7031. After contacting the outer shell 1, the gas diffuses outward. During the gas diffusion flow, the impurities carried at the bottom of the flexible cleaning layer 703 are separated from the flexible cleaning layer 703.

[0113] This achieves cleaning of the flexible cleaning layer 703 by simultaneously inflating and deflating the two airbags 7, and by compressing the gas in the sealed cavity between the two airbags 7, the high-velocity gas generated by the compression blows away impurities at the bottom of the flexible cleaning layer 703. The one-way valve 902 ensures that gas can only exit and not enter the exhaust pipe 9. When the air pump 702 controls the airbags 7 to contract, the diameter of the vent 7031 is smaller than that of the one-way valve 902, and external gas enters the sealed cavity between the two airbags 7 after passing through the one-way valve 902 and the exhaust pipe 9, serving as supplementary gas. When the air pump 702 controls the airbags 7 to inflate, the gas is again discharged downwards through the exhaust pipe 9, the inner cavity 7032, and the vent 7031.

[0114] Furthermore, during the expansion and contraction of the airbag 7 controlled by the air pump 702, the gas in the sealed cavity can be intermittently blown downward through the air outlet 7031. Optionally, the airbag 7 can be intermittently inflated and deflated by the air pump 702 to quickly adjust the volume in the sealed cavity, so that the gas in the sealed cavity is intermittently blown downward through the air outlet 7031. Utilizing the reaction force when the gas blows towards the outer shell 1, during the intermittent and rapid discharge of the gas through the air outlet 7031, the flexible cleaning layer 703 is affected by the airflow and generates a certain amplitude of vibration / oscillation, which accelerates the cleaning efficiency of impurities on the flexible cleaning layer 703, achieving self-cleaning without manual contact and without residue, so as to ensure that the surface of the airbag 7 remains clean when the airbag 7 is inflated next time, thereby ensuring the long-term reliability of zero SF6 leakage.

[0115] In addition, the above-mentioned cleaning process for the flexible cleaning layer 703 can be started on time before the deflation and retraction phase of the airbag 7, or according to the timing of the controller.

[0116] As an optional solution of the above embodiment, during use, when a gas leak is detected by the gas leak detector, the two airbags 7 seal the flange at that location, leaving the leaked gas in the sealed cavity between the two airbags 7.

[0117] However, when maintenance personnel repair the leak, SF6 gas decomposes and produces corrosive and irritating gases due to electric arcing or partial discharge from the electrical equipment inside the casing 1. This gas accumulates in the sealed cavity, and when the airbag 7 opens the sealed cavity, a large amount of this gas diffuses outwards. Those not wearing gas masks or protective clothing are easily inhaled, leading to respiratory or skin damage. Excessive release of this gas into the atmosphere also pollutes the local environment.

[0118] To address this, the exhaust pipe 9 and the flexible cleaning layer 703 are detachably and sealed together. Specifically, the top of the flexible cleaning layer 703 has a docking hole, and the end of the exhaust pipe 9 near the docking hole is sealed to the docking hole. A sealing layer is provided at the end of the exhaust pipe 9. Because the exhaust pipe 9 is made of flexible material, during use, the end of the exhaust pipe 9 near the flexible cleaning layer 703 can be pulled out from the inner cavity 7032 and connected to the negative pressure suction device. After the solenoid valve 901 is opened, the negative pressure suction device discharges the SF6-containing gas leaking between the two airbags 7 and collects it for treatment. During the suction of the leaked gas through one exhaust pipe 9, the pressure sensor located in the sealed cavity monitors the internal gas pressure in real time. When the pressure is lower than the preset value, the solenoid valve 901 on the exhaust pipe 9 of the other airbag 7 is opened, continuing to discharge and collect the gas in the sealed cavity. When the gas density leaking into the sealed cavity is lower than the preset value, the gas inside the airbag 7 is drawn in by two air pumps 702, causing the airbag 7 to retract into the sealing groove, and maintenance personnel inspect and maintain the flange at the leak point.

[0119] The above description is only a preferred embodiment 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.

[0120] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A diagnostic testing device for GIS equipment, comprising a housing (1), characterized in that, The outer shell (1) is equipped with a microphone and a voiceprint intelligent analysis terminal (2). The outer casing (1) is equipped with a variety of electrical devices. SF6 gas is filled inside the outer casing (1). A gas leak detector is provided on the outer casing (1) to detect the SF6 density and issue an alarm signal. The gas leak detector is a pressure and temperature compensated density relay. The density relay is located at the gas chamber valve and detects the SF6 density through a pressure sensor and a temperature probe. The voiceprint intelligent analysis terminal pre-collects fault voiceprint samples, obtains voiceprint signals of GIS equipment in various working states, compares the samples with fault voiceprint samples, and identifies whether there is a fault. It also includes a protective component (3) and a support frame (4) located on the outside of the housing (1). The protective component (3) includes a fixing part and a corrugated protective part (301). A cleaning component (5) is provided on the corrugated protective part (301) for cleaning the surface of the housing (1). The cleaning assembly (5) includes a drive unit (6) and a ring seat (502). The ring seat (502) is rotatably connected to the corrugated protective unit (301). An airbag (7) that can be inflated and deflated is provided on the inner side of the ring seat (502) for fitting the outer shell (1). The support frame (4) is provided with a horizontal moving component, which is used to drive the cleaning component (5) to move horizontally; When the gas leak detector detects a gas leak, the airbag (7) inflates to form an annular sealing strip to block the SF6 gas leak path; The airbag (7) has a flexible cleaning layer (703) on the outer side of its top, which is used to clean the impurity layer on the front side of the top of the airbag (7) in the direction of movement; The airbag (7) is provided with an exhaust pipe (9), the exhaust pipe (9) is provided with a solenoid valve (901), the outer surface of the outer shell (1) is provided with two magnetic adsorption rings, the middle part of the airbag (7) is provided with an electromagnet (704), the electromagnet (704) is located in the recess of the middle part of the airbag (7), and the electromagnet (704) and the magnetic adsorption rings are used to connect the middle part of the airbag (7) with the outer shell (1); The two airbags (7) expand and contract synchronously, blowing the gas in the sealed cavity inside the airbag (7) downward through the air outlet (7031) to clean the impurities carried at the bottom of the flexible cleaning layer (703); the exhaust pipe (9) is detachably and sealed to the flexible cleaning layer (703) to discharge and collect the gas in the sealed cavity.

2. The diagnostic testing device for GIS equipment according to claim 1, characterized in that, The microphone and voiceprint intelligent analysis terminal (2) has multiple microphones, each corresponding to a different electrical device inside the outer casing (1). The microphones are magnetically attached to the outer casing (1) without the need for drilling.

3. The diagnostic testing device for GIS equipment according to claim 2, characterized in that, The drive unit (6) includes a rotating motor (602), a gear (6021), and a limiting strip (5021) and a rack (5022) located on the outside of the ring seat (502). The gear (6021) and the rack (5022) mesh to drive the ring seat (502) and the airbag (7) to rotate in opposite directions. The airbag (7) scrapes and cleans the surface of the outer shell (1). The inner side of the ring seat (502) is provided with a baffle (5024) to limit the expansion direction of the airbag (7). The air inlet of the airbag (7) is connected to an air pump (702) through an air inlet pipe (701) for inflating and deflating the airbag (7).

4. The diagnostic testing device for GIS equipment according to claim 3, characterized in that, The horizontal moving component drives the ring seat (502) and the airbag (7) to move horizontally, thereby increasing the cleaning coverage of the airbag (7) over the outer shell (1).

5. A diagnostic testing device for GIS equipment according to claim 4, characterized in that, A pressure sensor is provided on the inner side of the ring seat (502) to detect the pressure value in the space between the airbag (7) and the ring seat (502) and to determine the location of SF6 gas leakage.

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