Diagnostic test equipment for GIS (Gas Insulated Switchgear) equipment

Abstract

The invention discloses diagnostic test equipment for GIS equipment, and belongs to the technical field of GIS. Comprising a shell, a sound pickup and a voiceprint intelligent analysis terminal are arranged on the outer side of the shell, various electrical devices are arranged in the shell, the shell is filled with SF6 gas, a gas leakage detector is arranged on the shell and used for detecting the SF density and sending out an alarm signal, and the voiceprint intelligent analysis terminal collects fault voiceprint samples, obtains voiceprint signals of GIS equipment in all working states and sends the fault voiceprint samples to the GIS equipment. And comparing the sample with the fault voiceprint sample to identify whether a fault occurs. The protection assembly blocks impurities through a corrugated protection part, the cleaning assembly is attached to the shell through air inflation of an air bag, and the impurities are comprehensively scraped by combining forward and reverse rotation of a rotating motor and movement of a horizontal motor, so that heat dissipation is prevented from being hindered or aging of an insulating part at a flange is accelerated. The flexible cleaning layer solves the problem of top impurity accumulation, and self-cleaning is achieved through air inflation and deflation of the air bag. When the gas leakage detector gives an alarm, the cleaning assembly moves to the flange, and the air bag is inflated to form an annular sealing belt.

Description

Technical Field

[0001] The present invention relates to the field of GIS technology, and in particular to a diagnostic test device for GIS equipment. Background Art

[0002] Gas-insulated metal-enclosed switchgear (GIS) is a key component of modern power systems, and its reliability directly impacts 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 within a metal casing filled with SF6 gas. The circuit breaker, as a core component, relies on SF6 gas for arc extinguishing, and its moving and static contacts are operated by an operating mechanism. Disconnectors and earthing switches are used to isolate the power supply or provide grounding protection during maintenance. The busbar, as an energy distribution carrier, is sealed within a gas-filled casing along with the current / voltage transformer. While this fully enclosed structure offers advantages such as small footprint and maintenance-free operation, it also makes internal status monitoring difficult, and traditional detection methods have significant limitations.

[0003] Currently, GIS failures primarily include mechanical failure, insulation failure, and gas leakage. Mechanical failures are often caused by wear of operating mechanism components (such as spring breakage and hydraulic leakage) or loose connections (such as loose busbar contact bolts). Under short-circuit electrodynamic forces or prolonged vibration, these failures can further lead to poor contact, partial discharge, and even insulation breakdown. Existing monitoring technologies, such as partial discharge detection, are affected by the acoustic attenuation of SF6 gas. Infrared temperature measurement can only detect established hotspots, while gas density monitoring cannot locate the source of leaks. These methods are insensitive to early-stage mechanical failures. However, actual operational data shows that over 60% of GIS failures can be detected early through vibroacoustic signatures.

[0004] Voiceprint diagnostic technology offers a new approach to solving this problem. The mechanical vibration frequency band of GIS (100-2000Hz) closely matches the bone conduction frequency response of voiceprint pickup (50-4000Hz). For example, the energy of the 125Hz component can be boosted by 15dB when a circuit breaker trips abnormally. Existing research using a fusion model of Mel-frequency Cepstral Coefficients (MFCC) and Convolutional Neural Networks (CNN) has achieved a 92.3% accuracy rate for identifying faults such as contact wear, a 29% improvement over traditional methods.

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

[0006] Furthermore, traditional monitoring systems lack fault emergency response capabilities. Leak detection and manual intervention take an average of two hours. During this time, SF6 leakage can exceed environmental limits, preventing timely and effective containment of the SF6 gas. This leads to continued insulation degradation and potentially serious accidents. Especially in high-voltage GIS equipment, SF6 gas leaks not only degrade the insulation strength of the equipment, but also produce highly corrosive decomposition products (such as HF and SO2), which can further damage internal components. This passive fault handling model is unable to meet the real-time control and management requirements of modern smart grids. Summary of the Invention

[0007] The purpose of the present invention is to solve the problem that the passive processing mode of GIS gas leakage in the existing technology cannot meet the urgent needs of modern smart grids for real-time control of equipment status, and to propose a diagnostic test device for GIS equipment.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A diagnostic test device for GIS equipment, comprising a housing, with a microphone and a voiceprint intelligent analysis terminal provided on the outer side of the housing; A variety of electrical equipment is installed inside the housing. The housing is filled with SF6 gas. A gas leakage detector is installed on the housing to detect the SF6 density and send out an alarm signal. The gas leakage detector is a pressure and temperature compensated density relay. The density relay is installed on the gas chamber valve and detects the SF6 density through a pressure sensor and a temperature probe. The voiceprint intelligent analysis terminal collects fault voiceprint samples in advance, obtains the voiceprint signals of GIS equipment in various working states, compares the samples with the fault voiceprint samples, and identifies whether there is a fault.

[0009] Also included is a GIS equipment voiceprint diagnosis method, comprising the following steps: S1, by collecting voiceprint samples of various GIS equipment mechanical faults, establishing a voiceprint feature model library, and obtaining the voiceprint signals of GIS equipment in various working states; S2 uses convolutional neural network (CNN) voiceprint recognition technology to process the signal, compare the sample with the fault model library, and quickly identify whether a fault has occurred; S3, combined with deep learning to continuously improve the fault library, the trained algorithm engine can accurately identify the abnormal fault types of hydraulic mechanisms, energy storage motors, and spring devices of large GIS equipment; The voiceprint feature extraction includes the following steps: S11, first pre-processing the voiceprint signal, including pre-emphasis, framing, and windowing operations, to improve signal quality and facilitate subsequent analysis; S12, then, converts the signal from the time domain to the frequency domain through discrete Fourier transform, and then filters the spectrum using a set of Mel filter banks to simulate the human ear's perception characteristics of sounds of different frequencies; 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 characteristics of the voiceprint signal, are sensitive to the timbre and resonance peak characteristics of the sound, and can well characterize the unique properties of different voiceprints, thereby extracting the voiceprint characteristics of GIS equipment in various working states.

[0010] In some embodiments, the microphone and voiceprint intelligent analysis terminal are provided with multiple microphones, and the multiple microphones correspond one to one to multiple electrical devices arranged in the shell. The microphones are mounted on the shell by magnetic patch type without punching.

[0011] In some embodiments, a protective assembly and a support frame are further included on the outside of the housing, wherein the protective assembly includes a fixing portion and a corrugated protective portion, and a cleaning assembly is provided on the corrugated protective portion for cleaning the surface of the housing; The cleaning assembly includes a driving part and a ring seat, the ring seat is rotatably connected to the corrugated protective part, and an air bag that can be inflated and deflated is provided inside the ring seat for fitting with the shell; The support frame is provided with a horizontal moving component for driving the cleaning component to move horizontally.

[0012] In some embodiments, the driving part includes a rotating motor, a gear, and a limit bar and a rack arranged on the outside of the ring seat. The gear and the rack are engaged with each other to drive the ring seat and the airbag to rotate forward and reverse, 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 expansion direction of the airbag, and the air bag air inlet is connected to an air pump through an air inlet pipe to inflate and deflate the airbag.

[0013] In some embodiments, the horizontal movement component drives the ring seat and the airbag to move horizontally, so as to increase the cleaning coverage of the airbag on the shell.

[0014] In some embodiments, when the gas leakage detector detects a gas leakage, the airbag is inflated to form an annular sealing band for blocking the SF6 gas leakage path.

[0015] In some embodiments, a pressure sensor is provided on the inner side of the ring seat for detecting the pressure value in the space between the airbag and the ring seat, and for determining the leakage location of SF6 gas.

[0016] 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 moving direction.

[0017] In some embodiments, the airbag is provided with an exhaust pipe, the exhaust pipe is provided with an electromagnetic valve, the outer surface of the shell is provided with two magnetic adsorption rings, the middle of the airbag is provided with an electromagnet, the electromagnet is provided in the recess in the middle of the airbag, and the electromagnet and the magnetic adsorption ring are used together to connect the middle of the airbag and the shell.

[0018] In some embodiments, the two airbags expand and contract synchronously, blowing the gas in the closed cavity inside the airbag downward through the air outlet to clean the impurities carried at the bottom of the flexible cleaning layer; the exhaust pipe is detachably and sealedly connected to the flexible cleaning layer to discharge and collect the gas in the closed cavity to the outside.

[0019] Compared with the prior art, the present invention provides a diagnostic test device for GIS equipment, which has the following beneficial effects.

[0020] 1. This invention collects voiceprint signals via a highly sensitive microphone located on the outside of the housing, eliminating the need to penetrate the interior and disrupting the normal operation of the GIS equipment. The microphone utilizes a magnetic patch-type mounting mechanism (no drilling required). Combined with bone conduction and dynamic noise reduction technology, it effectively shields external noise, capturing only target device noise and ensuring signal purity. The intelligent voiceprint analysis terminal utilizes deep learning algorithms (such as CNN) and MFCC feature extraction technology to establish a dynamically updated fault model library, enabling rapid identification of various faults, including hydraulic mechanisms and energy storage motors. Diagnostic accuracy continuously improves with sample accumulation.

[0021] 2. This invention's protective assembly blocks external impurities with a corrugated protective portion and features a cleaning component for automatic housing cleaning. The inflated airbag, which adheres to the housing surface, combines the forward and reverse rotation of the rotary motor with the motion of the horizontal motor to comprehensively scrape impurities from the housing surface, preventing accumulation that would otherwise hinder heat dissipation or accelerate aging of insulation at the flange. A flexible cleaning layer further addresses the problem of impurity accumulation on the top. The airflow generated by the inflation and deflation of the airbag enables self-cleaning, preventing residual impurities from affecting the seal and maintaining long-term housing cleanliness.

[0022] 3. When the gas leak detector sounds, the cleaning assembly quickly moves to the flange. Two sets of airbags are inflated to form an annular seal, sealing the leak between them and significantly reducing SF6 gas leakage. Simultaneously, a pressure sensor inside the ring seat pinpoints the leak, and an audible and visual alarm facilitates precise inspection by maintenance personnel. Leaked harmful gases (such as SF6 decomposition products) are centrally extracted and treated via an exhaust pipe connected to negative pressure equipment, minimizing human contact and air pollution, ensuring both safety and environmental protection.

[0023] Other advantages, objects and features of the present invention will be described in part in the following description; and in part will be apparent to those skilled in the art based on an examination of the following; or may be taught from the practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the front side of the housing of the present invention.

[0025] Figure 2 This is a structural diagram of the microphone and voiceprint intelligent analysis terminal of the present invention.

[0026] Figure 3 Schematic diagram of the microphone and voiceprint intelligent analysis terminal of the present invention.

[0027] Figure 4 Schematic diagram of the overall architecture of the microphone and voiceprint intelligent analysis terminal of the present invention.

[0028] Figure 5 It is a structural diagram of the internal busbar of GIS of the present invention.

[0029] Figure 6 It is a structural schematic diagram of the protection component of the present invention.

[0030] Figure 7 For the present invention Figure 6 Schematic diagram of the local structure.

[0031] Figure 8 It is a schematic diagram of the structure inside the motor housing of the present invention.

[0032] Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of area A in the middle.

[0033] Figure 10 It is a structural schematic diagram of the connection between the air pump and the air bag of the present invention.

[0034] Figure 11 It is a structural schematic diagram of the connection between the slideway and the limiting plate of the present invention.

[0035] Figure 12 It is a schematic diagram of the structure inside the ring seat of the present invention.

[0036] Figure 13 It is a structural schematic diagram of the electromagnet of the present invention.

[0037] Figure 14 For the present invention Figure 13 Schematic diagram of the enlarged structure of area B in the middle.

[0038] Figure 15 Schematic diagram of the structure of the air outlet of the present invention.

[0039] Figure 16 Schematic diagram of the structure inside the flexible cleaning layer of the present invention.

[0040] Figure 17 It is a structural schematic diagram of the rear side of the housing of the present invention.

[0041] Figure 18 It is a schematic diagram of the sliding structure of the limit plate and the slideway of the present invention.

[0042] Figure 19 This is a structural diagram of the GIS circuit breaker of the present invention.

[0043] Figure 20 Schematic diagram of the signal waveform, spectrum analysis and spectrogram of the present invention.

[0044] Figure 21 This is a flow chart of the voiceprint recognition technology of the present invention.

[0045] In the picture: 1. Housing; 101. Pot insulator; 102. Busbar contact; 103. Shielding cover; 104. Busbar; 105. Pot insulator flange; 2. Pickup and voiceprint intelligent analysis terminal; 3. Protection assembly; 301. Corrugated protection part; 3011. Mounting plate; 4. Support frame; 401. Slide; 402. Horizontal motor; 403. Threaded shaft; 404. Internal threaded plate; 5. Cleaning assembly; 501. Limit support frame; 5011. Limit plate; 5012. Curved plate; 502. Ring seat; 50 21. Limiting bar; 5022. Rack; 5023. Limiting slide; 5024. Baffle; 50241. Air vent; 5025. Movable cavity; 6. Driving unit; 601. Motor housing; 602. Rotating motor; 6021. Gear; 603. Gear slot; 604. Limiting slot; 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. One-way valve. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] Example 1 Reference Figure 1-21A diagnostic test device for GIS equipment includes a housing 1, within which are located various electrical devices, including a circuit breaker, a busbar 104, a transformer, a grounding switch, a lightning arrester, a disconnector, a current transformer, and a voltage transformer. The housing 1 is filled with SF6 gas at a certain pressure.

[0048] The housing 1 is provided with a pot-type insulator 101 , a busbar contact 102 , a shielding cover 103 , a busbar 104 and a pot-type insulator flange 105 .

[0049] Among them, the basin insulator flange 105 fixes the basin insulator 101 on the housing 1 and is grounded at the same potential as the housing 1; a busbar 104 is passed through the center of the basin insulator 101, a busbar contact 102 is fixed on the busbar 104, and a shielding cover 103 is arranged outside the busbar contact 102; the busbar 104, the busbar contact 102 and the shielding cover 103 are electrically isolated from the housing 1 through the basin insulator 101.

[0050] A microphone and a voiceprint intelligent analysis terminal 2 are provided on the outside of the housing 1 . There are multiple microphones in the microphone and the voiceprint intelligent analysis terminal 2 , and the multiple microphones correspond to multiple electrical devices provided in the housing 1 .

[0051] As an option, the microphone can be installed using a patch-type magnetic installation, which eliminates the need for drilling. It can highly sensitively collect noise conditions under various working conditions of the equipment, effectively shield external noise through bone conduction mode, and only collect the noise of the corresponding main device. The microphone and voiceprint intelligent analysis terminal 2 themselves have waterproof functions, and data is transmitted via wired transmission.

[0052] The microphone has built-in AGC and ALC adaptive dynamic noise reduction circuits, ATDA dynamic noise suppression technology, and a built-in high-speed voice ATC processing unit, offering advantages such as high sensitivity and fidelity. The microphone is connected to a voiceprint intelligent analysis terminal, which records noise in real time to create a noise file. After local noise reduction processing, it is uploaded to the voiceprint intelligent analysis terminal.

[0053] The acquisition of the voiceprint signal does not require intrusion into the housing 1 and does not affect the working state of any device in the housing 1 .

[0054] The Voiceprint Intelligent Analysis Terminal includes embedded edge computing software. It features a built-in CMFMC3.0 voiceprint analysis engine, supports multiple fault identification options, and integrates Ethernet, HDMI, Wi-Fi, Bluetooth, port-through, and 4G communication. It can create private voiceprint model libraries for different scenarios and devices, and intelligently monitor the operating status of devices within the enclosure. The Voiceprint Intelligent Analysis Terminal features an explosion-proof and waterproof design and can be wall-mounted if required. It also includes a built-in PCI-E 4G interface and supports various PCI-E 4G modules, including those from YUGE and Quectel. The Voiceprint Intelligent Analysis Terminal offers a rich set of expansion interfaces. The built-in CMFMC3.0 industrial voiceprint engine allows for the creation of private voiceprint model libraries for different scenarios and devices, and intelligently monitors device operating status. The local voiceprint engine analyzes multiple audio channels and identifies any abnormalities based on preset thresholds. Voiceprint files are stored locally for three months. Fault information and real-time alarms can be output via protocols such as HTTP / MQTT.

[0055] As a GIS equipment voiceprint diagnosis method, it includes the following steps: S1, by collecting the above-mentioned voiceprint samples of mechanical failures of various GIS equipment, a voiceprint feature model library is established to obtain the voiceprint signals of GIS equipment in various working states.

[0056] S2 uses convolutional neural network (CNN) voiceprint recognition technology to process the signal, compare the sample with the fault model library, and quickly identify whether a fault has occurred.

[0057] S3, combined with deep learning to continuously improve the fault library, the trained algorithm engine can accurately identify various fault types such as abnormalities in the hydraulic mechanism, energy storage motor, spring device, etc. of large GIS equipment.

[0058] Diagnostic Principle: The collected audio data is carefully annotated, and an algorithmic model is used to isolate the regular characteristic signals for each time period, thereby distinguishing the device's operating soundprint from ambient noise. This eliminates the need to first extract fault features and then analyze the fault pattern. Instead, a deep learning neural network is used to unify the extraction of soundprint features and fault patterns within a single neural network algorithm model. By quickly learning from positive samples, the system can then automatically identify negative samples and trigger an alarm.

[0059] Among them, regarding voiceprint feature extraction, the Mel-frequency cepstral coefficient (MFCC) voiceprint feature extraction technology is used. The specific steps are as follows: S11, first pre-process the voiceprint signal, including pre-emphasis, framing, windowing and other operations, to improve the signal quality and facilitate subsequent analysis.

[0060] S12, then, the signal is converted from the time domain to the frequency domain through discrete Fourier transform, and the spectrum is filtered using a set of Mel filter banks to simulate the human ear's perception characteristics of sounds of different frequencies.

[0061] S13 then takes the logarithm of the filtered result to highlight the amplitude changes of the signal, and finally performs a discrete cosine transform to obtain the MFCC coefficients. These coefficients can effectively capture the spectral envelope characteristics of the voiceprint signal and are sensitive to characteristics such as the timbre and formant of the sound. They can well characterize the unique properties of different voiceprints, thereby extracting the voiceprint characteristics of GIS equipment in various operating states.

[0062] Extraction principle: Spectrogram information, its horizontal axis represents time, the vertical axis represents frequency, and the grayscale value of each pixel reflects the intensity of the corresponding moment and the corresponding frequency.

[0063] Example 2 During the use of GIS equipment, impurities will adhere to the surface of the shell 1. The impurity layer on the shell 1 will hinder the convection heat exchange between the shell 1 and the outside air. In addition, the impurities will accumulate at the connection between the shell 1 and the flange, accelerate the aging of the insulating parts at the flange connection, and cause SF6 gas leakage.

[0064] In this regard, a protective component 3 is provided on the outside of the shell 1. The protective component 3 includes a fixed part and a corrugated protective part 301. The fixed part is used to be fixedly connected to the shell 1. A cleaning component 5 is provided on the corrugated protective part 301. The fixed part and the corrugated protective part 301 provide protection for the shell 1, and the cleaning component 5 cleans impurities on the surface of the shell 1.

[0065] A support frame 4 is provided on the outside of the protection component 3 , and the cleaning component 5 includes a driving part 6 and a ring seat 502 .

[0066] The driving part 6 includes a motor housing 601, inside which a rotating motor 602 and a transmission are provided, a rotating end of the rotating motor 602 is provided with a gear 6021, a gear slot 603 is provided inside the motor housing 601, and a limiting slot 604 is provided at the bottom of the gear slot 603 and passes through downward.

[0067] The ring seat 502 is rotatably connected to the corrugated protective portion 301. A limit bar 5021 is provided on the outer side of the ring seat 502, and a rack 5022 is provided on the outer side of the limit bar 5021; the limit bar 5021 is matched with the limit groove 604, and the rack 5022 is meshed with the gear 6021.

[0068] Two sets of baffles 5024 are provided on the inner side of the ring seat 502, each set of baffles 5024 having two baffles. A sealing groove is formed between two adjacent baffles 5024, and an airbag 7 is provided in the sealing groove. An air inlet of the airbag 7 is provided with an air inlet pipe 701. 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. An active cavity 5025 is formed at the edge of the ring seat 502 . The air inlet pipe 701 is a flexible pipe. Compensation sections are provided at corresponding positions of the air inlet pipe 701 and the active cavity 5025 .

[0069] There are two support frames 4, and a horizontal moving assembly is provided on the support frame 4. The horizontal moving assembly includes a slide 401, and the internal sliding connection of the slide 401 is a limit plate 5011. A horizontal motor 402, an internal threaded plate 404, and a threaded shaft 403 are provided inside one slide 401. The horizontal motor 402 is provided at one end of the slide 401, and the threaded shaft 403 is provided at the rotating end of the horizontal motor 402. The threaded shaft 403 passes through the internal threaded hole of the internal threaded plate 404. The internal threaded plate 404 is fixedly connected to the motor housing 601 through the limit support frame 501. A protective box is provided on the support frame 4, and the protective box is used to provide protection for the stable transmission of the threaded shaft 403 and the internal threaded plate 404. The protective box is provided with a box door for maintaining the threaded shaft 403 and the internal threaded plate 404 and replenishing lubricating grease.

[0070] A limiting slot 5023 is provided on the outer side of the ring seat 502 at a position corresponding to the limiting plate 5011 . The curved plate 5012 is movably connected to the limiting slot 5023 . The middle of the curved plate 5012 is fixedly connected to the limiting plate 5011 .

[0071] Mounting plates 3011 are provided at both ends of the corrugated protective portion 301, and the mounting plates 3011 are fixedly connected to the housing 1; As a connection method between the mounting plate 3011 and the housing 1, a mounting plate is provided on the housing 1. Threaded holes are provided on the mounting plate and the mounting plate 3011. The mounting plate 3011 is installed and fixed by passing a screw through the two threaded holes.

[0072] When in use, the housing 1 is protected by the fixing portion and the corrugated protective portion 301 to cope with external wind and sand impurities. The fixing portion and the corrugated protective portion 301 are directly installed on the existing GIS equipment without changing the internal electric field and gas sealing system.

[0073] When installing the fixing part and the corrugated protective part 301, first fix the mounting plate in the circumferential direction of the shell 1. The mounting plate can be optionally a clamp structure, and threaded holes are preset on the mounting plate. Before the multiple shell components that make up the shell 1 are spliced ​​together, first put the fixing part and the corrugated protective part 301 on the shell component.

[0074] Different electrical equipment are placed in a housing 1 composed of multiple shell components, and then the housing 1 is filled with SF6 gas at a certain pressure.

[0075] Next, a support frame 4 is set on the outside of the protective component 3. When the support frame 4 is fixed, the limit plates 5011 on both sides of the ring seat 502 are docked with the slide 401, and the threaded shaft 403 at the transmission end of the horizontal motor 402 is rotated through the internal threaded hole of the internal threaded plate 404, and then the horizontal motor 402 is fixedly installed on the inner end of the slide 401.

[0076] In the initial state, the airbag 7 is not filled with gas, and the airbag 7 does not block the air vent 50241. External gas can form gas convection inside the fixing part and the corrugated protective part 301 through the air vent 50241, and the shell 1 dissipates heat normally.

[0077] According to the needs of use, the controller can control the air pump 702 to inflate the airbag 7 at a fixed time, so that the airbag 7 expands under the limiting action of the sealing groove between the two adjacent baffles 5024. Under the limiting action of the sealing groove, the inner side of the airbag 7 is fitted with the outer surface of the shell 1. Then the controller starts the rotating motor 602, and the rotating motor 602 drives the limiting strip 5021, the ring seat 502 and the airbag 7 to rotate back and forth in the forward and reverse directions through the engagement of the gear 6021 and the rack 5022. The inner side of the airbag 7 scrapes and cleans the outer surface of the shell 1, and the airbag 7 adheres to the outer surface of the shell 1. As the airbag 7 rotates back and forth in both directions, the impurities on the surface separate from the outer shell 1 and fall off; at the same time, the horizontal motor 402 drives the internal threaded plate 404 to slide horizontally along the slide 401 through the threaded shaft 403. When the limit groove 604 limits the limit bar 5021 and the limit slide groove 5023 limits the curved plate 5012, the threaded shaft 403 drives the internal threaded plate 404 to move horizontally along the slide 401, and drives the ring seat 502 to move synchronously. The ring seat 502 squeezes and contracts the corrugated protective part 301 in the moving direction through the rotation of the airbag 7.

[0078] When the airbag 7 rotates to scrape and clean the outer surface of the housing 1, the ring seat 502 and the airbag 7 move horizontally, thereby increasing the coverage of the airbag 7 in the rotating state and removing dust accumulated on the housing 1.

[0079] A gas leak detector is provided on the housing 1. The gas leak detector can be optionally a pressure and temperature compensated density relay. The density relay can be installed on the gas chamber valve, calculates the SF6 density through the pressure sensor and temperature probe, and issues an alarm signal when the density drops.

[0080] When the gas leak detector detects gas leakage in the shell 1, the horizontal motor 402 starts, and the threaded fit 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 shell assembly. At this time, the air bags 7 in the two sets of baffles 5024 are inflated respectively by two air pumps 702. As the air bags 7 expand, the air holes 50241 on the baffles 5024 are closed. As the air bags 7 continue to expand, they continue to expand radially along the baffles 5024 until an interference fit is formed with the cylindrical surface of the shell 1. Two annular sealing belts are formed on both sides of the flange by the two air bags 7, and the flange at the connection of the shell assembly is completely sealed between the two air bags 7, preventing SF6 gas from further leaking through the air bags 7.

[0081] Generally, the flange at each connection of the shell assembly corresponds to a cleaning assembly 5 , and the flange is sealed by two air bags 7 in the cleaning assembly 5 .

[0082] If required, when multiple housing assemblies are short and the flanges at their connection are close together, multiple cleaning assemblies 5 can be pre-set on a single corrugated protective portion 301, each corresponding to a horizontal motor 402. The multiple horizontal motors 402 drive the multiple cleaning assemblies 5 to move horizontally. When the gas leak detector detects a gas leak in the housing 1, the multiple ring seats 502 sequentially correspond to the multiple flanges, and the two airbags 7 similarly seal the flanges, achieving a timely sealing effect and reducing the amount of SF6 gas leakage.

[0083] Furthermore, a pressure sensor can be provided on the inner side of the ring seat 502, and the pressure value in the space between the two air bags 7 and the ring seat 502 can be detected by the pressure sensor. After the two air bags 7 form a seal on a certain flange, the sensor inside the current ring seat 502 is within the standard threshold. As the SF6 gas leaks through the flange at that location, the pressure inside the ring seat 502 will gradually increase. The pressure value change inside the ring seat 502 can be monitored in real time by the pressure sensor to determine the SF6 gas leakage position on the housing 1. An audible and visual alarm can be provided on each ring seat 502. When the pressure sensor detects that the internal pressure value of a certain ring seat 502 changes and increases, the audible and visual alarm receives the alarm signal and triggers the alarm, so that maintenance personnel can locate the SF6 gas leakage position in time and perform maintenance on the flange in time.

[0084] It can be understood that when the gas leakage detector detects that there is a gas leakage in the shell 1, multiple horizontal motors 402 respectively drive multiple ring seats 502 to correspond to multiple flanges one by one, and the gas is filled in the airbag 7 to fit tightly with the shell 1 on both sides of the flange. The pressure value in the space between the two airbags 7 and the ring seat 502 is detected by the pressure sensor on the inside of the ring seat 502. If the pressure value increases within the preset time, it means that there is no leakage in the flange at that location. In this way, whether there is leakage at multiple flange connections can be checked. In this way, the flange at the leaking location can be sealed in time through the two airbags 7 and the ring seat 502 at the early stage of SF6 gas leakage.

[0085] The data detected by the pressure sensor is transmitted back to the analysis terminal in real time. When the gas leakage detector detects that there is a continuous gas leakage in the shell 1, but the pressure value in the space between the two airbags 7 and the ring seat 502 corresponding to the flange at the leakage point no longer continues to increase, it is actively judged that there is a gap between the airbag 7 and the shell 1, and the gas leaks to the outside through the gap. At this time, the secondary alarm is triggered by the sound and light alarm, and the corresponding horizontal motor 402 is linked to fine-tune the axial position of the ring seat 502. At the same time, the inflation pressure of the airbag 7 is increased again through the air pump 702, so that the inner side of the airbag 7 and the shell 1 are further tightened until the pressure sensor reading is steadily increased, confirming that the leak has been effectively blocked, ensuring that SF6 gas no longer leaks.

[0086] Example 3 This embodiment is a further improvement of the above embodiment. As an optional solution, in actual use, during the back-and-forth rotation of the airbag 7 and the horizontal movement of the ring seat 502 and the airbag 7 driven by the horizontal motor 402, the threaded shaft 403 and the internal threaded plate 404, since the arc surface on the top of the shell 1 tends to be flat, when the airbag 7 rotates back and forth, part of the dust on the top of the shell 1 cannot slide to the sides and can only follow the movement during the back-and-forth rotation of the airbag 7; and in the process of continuously driving the ring seat 502 and the airbag 7 to move horizontally by the horizontal motor 402, the impurities are repeatedly crushed and It accumulates between the inner side of the top of the airbag 7 and the top surface of the shell 1, and eventually forms a hardened impurity layer that gradually thickens and hardens. This will cause local high stress concentration between the airbag 7 and the top of the shell 1, making the surface of the airbag 7 more susceptible to wear and even scratches by the sharp area particles formed by the hardened impurity layer, causing the airbag 7 and the surface of the shell 1 to lose the interference fit and cause local air leakage; at the same time, the accumulated hardened impurity layer will hinder the ring seat 502 from continuing to move, causing the horizontal motor 402 to stall and the threaded shaft 403 to overload, and even completely fail the cleaning and emergency sealing functions, exacerbating the risk of SF6 leakage.

[0087] In this regard, the following embodiments are provided to solve the above problems: A flexible cleaning layer 703 is provided on the airbag 7. In the initial state, the airbag 7 is in a contracted state. The flexible cleaning layer 703 contracts as the airbag 7 contracts into the sealing groove formed by the two baffles 5024. When the controller controls the air pump 702 to inflate the airbag 7 at a fixed time, and the airbag 7 scrapes and cleans the outer surface of the shell 1, the flexible cleaning layer 703 extends out of the sealing groove along with the airbag 7 as the airbag 7 expands. When the gas in the airbag 7 is fully filled and the inner wall of the airbag 7 is in contact with the outer surface of the shell 1, the inner surface of the flexible cleaning layer 703 contacts the outer surface of the shell 1. The flexible cleaning layer 703 is arranged on the outer side of the top end 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 end of the airbag 7 in the moving direction.

[0088] This prevents impurities from repeatedly accumulating and compacting between the inner side of the top of the airbag 7 and the top surface of the housing 1, thereby preventing the formation of a hardened impurity layer. The conditions for the formation of a hardened impurity layer are eliminated, thereby preventing the formation of a hardened impurity layer between the airbag 7 and the housing 1. This eliminates excessive impurities on the housing 1 or maintains the thickness of impurities on the housing 1 within a controllable range, thereby reducing the excessive impact of excessive impurities on the heat dissipation of the housing 1. Furthermore, it ensures that an interference fit is always maintained between the airbag 7 and the housing 1, while keeping the ring seat 502 moving smoothly.

[0089] However, in actual operation, although the scraping effect 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 shell 1, as the flexible cleaning layer 703 is repeatedly used to scrape impurities on the surface of the shell 1, a layer of impurities will be formed on the flexible cleaning layer 703 due to static electricity and other reasons. When the shell 1 is cleaned and the airbag 7 is evacuated and contracted by the air pump 702, the flexible cleaning layer 703 contracts synchronously with the airbag 7, and the flexible cleaning layer 703 comes into close contact with the top layer of the airbag 7 again, which will cause the impurity layer on the flexible cleaning layer 703 to be transferred to the inner side of the top of the airbag 7. When the airbag 7 is inflated by the air pump 702 next time, because of the impurity layer on the inner side of the top of the airbag 7, when the inner wall of the airbag 7 contacts the surface of the shell 1, a gap may be formed between the inner side of the top of the airbag 7 and the shell 1, causing the gas between the two airbags 7 to leak through the gap, resulting in the reappearance of trace SF6 leakage.

[0090] In this regard, an exhaust pipe 9 is provided on the airbag 7, which runs through the airbag 7. An electromagnetic valve 901 is provided on the exhaust pipe 9, two magnetic adsorption rings are provided on the outer surface of the shell 1, and an electromagnet 704 is provided in the middle of the airbag 7. The electromagnet 704 is provided in the recess in the middle of the airbag 7.

[0091] During use, after the outer surface of the shell 1 is cleaned by the airbag 7 and the flexible cleaning layer 703, the horizontal motor 402 drives the ring seat 502 and the airbag 7 to move horizontally to the preset magnetic adsorption ring through the threaded shaft 403 and the internal threaded plate 404, so that the two airbags 7 correspond to the two magnetic adsorption rings respectively, and then the air pump 702 inputs the airbag 7 through the inlet pipe 701 to expand the airbag 7. At this time, the electromagnet 704 in the middle of the airbag 7 is energized. When the inner side of the airbag 7 approaches the magnetic adsorption ring, multiple electromagnets 704 are magnetically adsorbed on the shell 1. The magnetic adsorption ring on the outer surface and the two airbags 7 are tightly attached to the outer surface of the shell 1 after continuous inflation by the air pump 702. At this time, the airbags 7 are repeatedly inflated and deflated by the air pump 702 corresponding to the magnetic adsorption ring, so that the volume of the airbag 7 changes repeatedly when the inner electromagnet 704 is magnetically connected to the magnetic adsorption ring. During the process of the volume change of the airbag 7, the inner side of the airbag 7 maintains a stable connection with the magnetic adsorption ring, and the movement amplitude of the bottom of the airbag 7 does not cause a gap between the inner side of the airbag 7 and the outer surface of the shell 1, thereby preventing gas from entering and exiting through the gap between the airbag 7 and the shell 1. Specifically, when the air pump 702 controls the expansion of the airbag 7, the solenoid valve 901 on one of the exhaust pipes 9 remains open, and the solenoid valve 901 on the exhaust pipe 9 on the other airbag 7 remains closed. As the two airbags 7 expand, the inner part of the airbag 7 continues to expand and approaches the outer surface of the shell 1, so that the volume of the closed cavity inside the two airbags 7 is reduced. At the same time, the gas in the closed cavity is squeezed through the exhaust pipe 9 and enters the inner cavity 7032, and then blown downward through the air outlet 7031, and diffuses outward after contacting the shell 1. During the gas diffusion flow process, the impurities carried at the bottom of the flexible cleaning layer 703 are separated from the flexible cleaning layer 703.

[0092] In this way, by simultaneously inflating and deflating the two airbags 7, the air in the sealed cavity between the two airbags 7 is squeezed, and the high-flow gas generated by the squeezing blows away impurities at the bottom of the flexible cleaning layer 703, thereby cleaning the flexible cleaning layer 703. The one-way valve 902 prevents the air in the exhaust pipe 9 from entering but not exiting. When the air pump 702 controls the airbags 7 to contract, the aperture of the air outlet 7031 is smaller than the one-way valve 902. External air passes through the one-way valve 902 and the exhaust pipe 9 and enters the sealed cavity between the two airbags 7, serving as supplemental gas. When the air pump 702 controls the airbags 7 to expand, the air is again discharged downward through the exhaust pipe 9, the inner cavity 7032, and the air outlet 7031.

[0093] Furthermore, during the process of the air pump 702 controlling the expansion and contraction of the airbag 7, the gas in the closed cavity can be intermittently controlled to be blown out downward through the air outlet 7031. Optionally, the air pump 702 can be used to intermittently inflate and deflate the airbag 7, and the volume in the closed cavity can be quickly adjusted so that the gas in the closed cavity is intermittently blown out downward through the air outlet 7031. By utilizing the reaction force when the gas is blown toward the outer shell 1, during the process of the gas being intermittently and quickly discharged through the air outlet 7031, the flexible cleaning layer 703 is affected by the airflow to produce a certain amplitude of vibration / swing, thereby accelerating the cleaning efficiency of impurities on the flexible cleaning layer 703, and realizing self-cleaning without manual contact and residue, so as to ensure that the surface of the airbag 7 is always kept clean when the airbag 7 is inflated next time, thereby ensuring that the reliability of SF6 zero leakage can be maintained for a long time.

[0094] As a supplement, the above cleaning process of the flexible cleaning layer 703 can be started before the deflation and contraction stage of the airbag 7, or according to the timing of the controller to start the cleaning of the flexible cleaning layer 703 on time.

[0095] As an optional solution of the above embodiment, during use, when a gas leakage is detected in the housing 1 by a gas leakage detector, the two air bags 7 complete the sealing of the flange at that location, so that the leaked gas remains in the closed cavity between the two air bags 7.

[0096] However, when maintenance personnel perform maintenance on the leak, arcing or partial discharges may occur in the electrical equipment within the housing 1, causing the SF6 gas to decompose and produce corrosive and irritating gases. These gases accumulate in the sealed chamber. When the airbag 7 opens, these gases diffuse outward. Without a respirator or protective clothing, inhalation of these gases can cause respiratory or skin damage. Excessive discharge of these gases into the atmosphere can also pollute the local environment.

[0097] In this regard, the exhaust pipe 9 and the flexible cleaning layer 703 are detachably sealed. Specifically, a docking hole is provided at the top of the flexible cleaning layer 703, and the end of the exhaust pipe 9 near the docking hole is sealedly connected to the docking hole. A sealing layer is provided at the end of the exhaust pipe 9. Since the exhaust pipe 9 is made of a flexible material, during use, the end of the exhaust pipe 9 near the flexible cleaning layer 703 can be pulled out of 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 gas leaked between the two airbags 7 to the outside for centralized treatment. In the process of sucking the leaked gas through one exhaust pipe 9, the pressure sensor located in the closed cavity detects the internal gas pressure in real time. When the pressure is lower than a preset value, the solenoid valve 901 on the exhaust pipe 9 of the other airbag 7 is opened to continue to discharge and collect the gas in the closed cavity. When the density of the gas leaked in the closed cavity is lower than the preset value, the gas in the airbag 7 is sucked out by two air pumps 702, so that the airbag 7 is retracted into the sealing groove, and the maintenance personnel inspect and maintain the flange at the leaking location.

[0098] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

[0099] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

Claims

1. A diagnostic test device for GIS equipment, comprising a housing (1), characterized in that: A microphone and a voiceprint intelligent analysis terminal (2) are provided on the outside of the housing (1); A variety of electrical equipment is arranged inside the housing (1). The housing (1) is filled with SF6 gas. A gas leakage detector is provided on the housing (1) for detecting the density of SF6 and issuing an alarm signal. The gas leakage detector is a pressure and temperature compensation type density relay. The density relay is arranged on the gas chamber valve and detects the SF6 density through a pressure sensor and a temperature probe. The voiceprint intelligent analysis terminal collects fault voiceprint samples in advance, obtains the voiceprint signals of GIS equipment in various working states, compares the samples with the fault voiceprint samples, and identifies whether there is a fault.

2. The diagnostic test device for GIS equipment according to claim 1, characterized in that: The microphone and voiceprint intelligent analysis terminal (2) has a plurality of microphones, and the plurality of microphones are arranged one-to-one with a plurality of electrical devices in the housing (1). The microphones and the housing (1) are mounted by patch-type magnetic attraction, eliminating the need for punching.

3. The diagnostic test equipment for GIS equipment according to claim 1, characterized in that: It also includes a protective component (3) and a support frame (4) arranged outside the housing (1), the protective component (3) including a fixing portion and a corrugated protective portion (301), and a cleaning component (5) is provided on the corrugated protective portion (301) for cleaning the surface of the housing (1); The cleaning assembly (5) includes a driving portion (6) and a ring seat (502), wherein the ring seat (502) is rotatably connected to the corrugated protective portion (301), and an air bag (7) capable of being inflated and deflated is provided on the inner side of the ring seat (502) for fitting with the outer shell (1); The support frame (4) is provided with a horizontal movement component for driving the cleaning component (5) to move horizontally.

4. The diagnostic test equipment for GIS equipment according to claim 3, characterized in that: The driving part (6) comprises a rotating motor (602), a gear (6021), and a limiting bar (5021) and a rack (5022) provided on the outside of the ring seat (502). The gear (6021) and the rack (5022) are meshed and cooperated to drive the ring seat (502) and the airbag (7) to rotate forward and reverse, and the airbag (7) scrapes and cleans the surface of the shell (1). A baffle (5024) is provided on the inner side of the ring seat (502) for limiting 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 deflation of the airbag (7).

5. The diagnostic test device for GIS equipment according to claim 4, characterized in that: The horizontal movement assembly drives the ring seat (502) and the airbag (7) to move horizontally, so as to increase the cleaning coverage of the airbag (7) on the housing (1).

6. The diagnostic test equipment for GIS equipment according to claim 5, characterized in that: When the gas leakage detector detects a gas leakage, the air bag (7) is inflated to form an annular sealing belt for blocking the SF6 gas leakage path.

7. The diagnostic test device for GIS equipment according to claim 6, characterized in that: A pressure sensor is provided on the inner side of the ring seat (502) for detecting the pressure value in the space between the airbag (7) and the ring seat (502) and for determining the leakage position of SF6 gas.

8. The diagnostic test equipment for GIS equipment according to claim 7, characterized in that: A flexible cleaning layer (703) is provided on the outer side of the top of the airbag (7) for cleaning the impurity layer on the front side of the top of the airbag (7) in the moving direction.

9. The diagnostic test device for GIS equipment according to claim 8, characterized in that: The airbag (7) is provided with an exhaust pipe (9), the exhaust pipe (9) is provided with an electromagnetic valve (901), the outer surface of the 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 a recessed position in the middle part of the airbag (7), and the electromagnet (704) and the magnetic adsorption ring cooperate to connect the middle part of the airbag (7) and the shell (1).

10. The diagnostic test device for GIS equipment according to claim 9, characterized in that: 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 on the bottom of the flexible cleaning layer (703); the exhaust pipe (9) is detachably sealed and connected to the flexible cleaning layer (703) to discharge and collect the gas in the sealed cavity.

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