290 results about "Sulfur hexafluoride" patented technology

The invention relates to the technical field of optics, in particular to a gas concentration regulation and control interference imaging system applied to shape righting of a nozzle handle, a shape righting tool and a nozzle are prepared, the shape righting tool is provided with a downward pressing mechanism, the downward pressing mechanism is provided with a downward pressing telescopic column for correcting the nozzle handle, and a displacement measurement interferometer system is assembled on the shape righting tool; the displacement measurement interferometer system is provided with a reflecting movable mirror and a beam splitter, and the reflecting movable mirror is mounted on the pressing telescopic column; the displacement measurement interferometer system further comprises an interference light path stroke difference fine tuning system. The interference light path stroke difference fine adjustment system comprises a glass container for containing sulfur hexafluoride, the end faces of the two ends of the glass container are flat and transparent, the glass container is arranged on a light path between the beam splitter and the reflective moving mirror, and the end faces of the two ends of the glass container are perpendicular to laser on the light path; the glass container is provided with an air supply port; the air supply port is connected to an air pump, and the air pump is connected with a sulfur hexafluoride air source. And the shape correcting position of the nozzle handle is accurately controlled.

The invention relates to the technical field of data processing, and discloses an intelligent arrangement, storage, tracking, management and control method and system for sulfur hexafluoride gas cylinders. The method comprises the following steps: performing leakage risk assessment through a sulfur hexafluoride concentration sensor and a gas cylinder pressure monitoring device to obtain an environmental risk data set; performing multi-dimensional state sensing on the gas cylinder according to the intelligent label and the inclination angle sensor to obtain a dynamic state information set of the gas cylinder; performing path optimization through a multi-target search algorithm to obtain a multi-target path cost matrix; performing Pareto optimal solution screening through a leading edge set maintenance mechanism to obtain an optimal scheduling path set; and tracking the life cycle of the gas cylinder based on the state machine model to obtain full life cycle tracking data. The problems of intelligent scheduling optimization and full-life-cycle tracking management and control under the multi-target constraint condition in sulfur hexafluoride gas cylinder storage management are solved.

The invention discloses a micropore-rich carbon adsorbent and application thereof in separation of mixed gas of sulfur hexafluoride and nitrogen, and the micropore-rich carbon adsorbent is prepared by taking cellulose acetate as a precursor, performing low-temperature pre-carbonization treatment in an inert atmosphere, mixing with KOH, performing high-temperature activation in the inert atmosphere, and finally washing and drying. The carbon adsorbent prepared by a unique two-step method of low-temperature pre-carbonization and high-temperature activation has an extremely high specific surface area (1100-1700m < 2 > / g) and a pore channel structure mainly comprising micropores (the pore diameter is concentrated in 0.5-0.8 nm). The adsorbent shows ultrahigh adsorption capacity (the adsorption capacity can reach 2.83 mmol / g at the temperature of 25 DEG C and the pressure of 0.1 bar) on SF6. The carbon adsorbent disclosed by the invention is simple in preparation method, low in raw material cost and environment-friendly, and has a wide application prospect in the field of SF6 recovery and purification.

The invention relates to the technical field of welding, in particular to an optical detection system for gas components in a stabilizer welding tool, a welding tool box and a gas adding system are prepared, and an upper plate of the welding tool box is provided with an operation window; the welding tool box is provided with a glass window; the gas component detection system comprises a beam splitter and a movable reflecting mirror, and a light path between the beam splitter and the movable reflecting mirror penetrates through the glass window; a metal net cylinder is arranged between the opposite glass windows of the welding tool box; a light path penetrates through the hollow part of the metal net cylinder; the gas component detection system further comprises an interference path stroke difference adjusting system; the interference path stroke difference adjusting system comprises a glass container, and the glass container is arranged on a light path between the beam splitter and the movable reflector; the interference path stroke difference adjusting system further comprises an air pump, and the air pump is connected with a sulfur hexafluoride gas source. Therefore, the stability of argon in the welding tool box is ensured, and the welding quality of the stabilizer is improved.

This invention relates to a sampling device and method for sulfur hexafluoride (SF6) and its mixed gases used in electrical equipment. The sampling device includes an equipment connection module, a sampling module, a gas filling module, and a vacuuming module. The equipment connection module, used to connect the electrical equipment and the gas sampler, consists of an equipment connection valve, a diaphragm pump, and corresponding pipelines. The sampling module, used for gas buffering, consists of a sampling cylinder, a pressure detection unit, a sampling valve, a gas filling valve, a tail gas valve, and corresponding pipelines. The gas filling module, used to fill the sampling container, consists of a booster pump, a sampling container connection valve, and corresponding pipelines. The vacuuming module, used for vacuuming and tail gas collection, consists of a vacuum pump, a tail gas collection device, and its connection valves. The sampling method utilizes appropriate flushing and vacuuming methods when the gas pressure is higher or lower than 0.2 MPa. This sampling device and method can improve the accuracy of sampling sulfur hexafluoride gas or sulfur hexafluoride mixed insulating gases.

The invention relates to the technical field of transformer substation sulfur hexafluoride monitoring, in particular to a sulfur hexafluoride monitoring system for a transformer substation, which comprises a detection module, a signal processing unit, a communication interface module, an alarm device and a power management module. The detection module is integrated with various sensors, so that the concentration of sulfur hexafluoride and environmental parameters can be acquired at high precision; the signal processing unit has the functions of data normalization, abnormal value elimination, leakage positioning and trend prediction; the communication interface module supports multi-mode wireless transmission and data encryption; the alarm device provides multi-stage alarm signals; and the power management module adopts a dual-power-supply framework and is integrated with a protection circuit. The system improves the complex environment adaptability through the modular design, has the characteristics of high sensitivity, strong data processing capability and rapid maintenance, and is suitable for real-time monitoring and safety management of sulfur hexafluoride in a transformer substation and other scenes.

A coated optical component includes an optical component and a conformal coating. The optical component is crystalline calcium fluoride and the conformal coating is an atomic layer deposition (ALD) coating in contact with a surface of the optical component. The ALD coating includes a metal fluoride ALD coating having a metal different from calcium. The ALD coating can include other metal oxide or metalloid oxide ALD coating layers. The method for making the coated optical component includes depositing an atomic layer deposition (ALD) coating on a surface of the optical component, where the ALD coating can be a metalloid oxide, a metal oxide, a metal fluoride having a metal that is different from calcium, or combinations of these. Sulfur hexafluoride is used as a fluorine source in the ALD process.

The invention relates to the technical field of gas detection, in particular to a sulfur hexafluoride quantitative detection system which comprises a shell and a sulfur hexafluoride sensor arranged in the shell, a gas inlet channel for injecting gas to be detected is arranged in the shell, and a centrifugal gas pump is arranged in the gas inlet channel; the sulfur hexafluoride sensor is wrapped with an elastic air bag; the air inlet is formed in the lower end of the shell; the shell is provided with an annular surface above the air inlet; the centrifugal air pump comprises a motor system; the motor system comprises a motor shell, a stator and a rotor; the stator is arranged in the motor shell; a supporting bearing used for supporting the weight of the rotor is arranged between the rotor and the motor shell, and a base used for fixing the motor and vertically placing the motor is arranged below the motor shell; the supporting bearing is a magnetic supporting bearing, the magnetic supporting bearing comprises two repellent magnets, one magnet is located at the bottom, and the other magnet is a permanent magnet which is located above the magnet and fixed to the rotor shaft. The measurement fluctuation is reduced, and the accuracy of sulfur hexafluoride detection is improved.

The invention discloses a GIS equipment SF6 micro-water density lightweight online monitoring method based on double threshold triggering, and relates to the field of power equipment.The method comprises the steps that on the basis of a fusion mechanism of nonlinear drift characteristics and historical calibration parameters, sensor coefficients are calibrated; synchronously acquiring partial discharge and sulfur hexafluoride micro-water signals through a sensor; the method comprises the following steps: pre-screening abnormal data segments in partial discharge and sulfur hexafluoride micro-water signals through double thresholds of amplitude and time, and extracting alignment time marks and frequency domain energy, pulse density and micro-water slope features to obtain normalized features; inputting the normalized features into a classifier, and outputting the fault type and confidence of the gas insulated switchgear; and generating a maintenance and replacement instruction of the gas insulated switchgear according to the fault type and the confidence coefficient. According to the invention, through fusion of the high-precision capacitive humidity sensing network and the intelligent diagnosis algorithm, real-time sensing and risk early warning of the health state of the air chamber are realized.

The invention discloses a fault diagnosis method for a gas-insulated metal-enclosed switchgear, and particularly relates to the technical field of fault diagnosis. Abnormal hot area distribution and structural deformation characteristics of equipment are analyzed through infrared thermal imaging data and visible light image data, an image analysis result is generated, whether gas leakage exists in the equipment or not is judged based on sulfur hexafluoride gas density data, and a gas analysis result is output; judging whether the equipment has abnormal vibration based on the vibration signal data, and outputting a vibration analysis result; based on an image analysis result and a gas and vibration analysis result, establishing a fault association relationship, generating a comprehensive diagnosis result, and determining a fault type and a risk level; in combination with a control rule base, a control signal or an operation and maintenance execution instruction is generated, and cross-modal synchronous diagnosis and accuracy and response real-time performance of fault diagnosis of the gas-insulated metal-enclosed switchgear are realized.

The invention provides an SF6 gas monitoring data analysis system and method and a computer storage medium. The SF6 gas monitoring data analysis system comprises edge computing equipment and n SF6 micro-water density sensors arranged at n preset positions of power equipment, the n SF6 micro-water density sensors acquire sensor data of n preset positions in a preset time period to obtain n groups of sensor data sets, and the n groups of sensor data sets are transmitted to the edge computing device; each sensor data set comprises a plurality of sensor data; the edge computing device determines n abnormal fitting straight lines at preset positions according to the n groups of sensor data sets to obtain n abnormal fitting straight lines; determining n abnormal moments according to the n abnormal fitting straight lines, wherein an abnormal degree value corresponding to each abnormal moment is a preset value; and performing early warning processing operation according to the n abnormal moments. By adopting the embodiment of the invention, the sulfur hexafluoride gas leakage monitoring intelligence can be improved.

The invention relates to the technical field of image processing, and discloses a sulfur hexafluoride ring main unit gas leakage detection method and system based on thermal imaging, and the method comprises the steps: obtaining an infrared thermal imaging multispectral sequence image of a ring main unit; identifying a plurality of candidate regions of the multispectral sequence image, selecting a gas reference region, and calculating an average multispectral vector of the gas reference region as a gas reference spectrum; calculating the intra-group variance of each spectrum channel, and determining a weight vector and an angle threshold value; calculating a weighted spectral angle between the multispectral vector of the pixel point to be detected and the gas reference spectrum; judging the to-be-detected pixel point which simultaneously meets the following conditions as a gas leakage point: the weighted spectral angle is smaller than an angle threshold value, and the temperature of the to-be-detected pixel point is lower than a preset temperature threshold value; and generating a visual image of the gas leakage area according to all the judged gas leakage points. According to the invention, the anti-interference capability of detection is improved, and reliable identification of sulfur hexafluoride gas leakage can be realized under a complex background.

The invention discloses a high-voltage on-load tap switching device, and relates to the technical field of tap switches, and the device comprises a switching mechanism which is used for completing the slitting processing of a high voltage; the driving mechanism provides power for switching of the switching mechanism; according to the invention, through the linkage of the driving mechanism and the recovery mechanism, before the first moving contact is switched, the second moving contact is separated from the second static contact to generate an electric arc, the pressure storage pump is synchronously triggered to release sulfur hexafluoride gas for arc extinguishing, the electric arc is rapidly extinguished by using the characteristics of cooling, deionization and blocking reignition, an arc-free environment is created for the high-voltage switching of the first moving contact, and the high-voltage switching of the first moving contact is realized. After arc extinguishing, a negative pressure pump is triggered through meshing transmission of an inner gear and a rack, sulfur hexafluoride gas in a left cavity is sucked into a recovery tank, rapid gas recovery is achieved, economic losses caused by gas waste are reduced, meanwhile, the risk of equipment aging is reduced, and the service life of equipment is prolonged. The service life of equipment is prolonged.

The invention discloses a sulfur hexafluoride leakage detection method based on cooperation of long-wave infrared and thermal infrared spectrums, the sulfur hexafluoride leakage detection method is applied to a sulfur hexafluoride leakage detection device, and the sulfur hexafluoride leakage detection method comprises the following steps: carrying out calibration and parameter configuration on the sulfur hexafluoride leakage detection device; long-wave infrared spectrum and thermal infrared temperature field data are synchronously collected, preprocessing and time-space matching are carried out on the long-wave infrared spectrum and the thermal infrared temperature field data, leakage identification parameters are obtained, the thermal infrared temperature field data are temperature values of pixel points of a temperature field image, parameter calculation and risk early warning are carried out on the leakage identification parameters, and the leakage identification result is obtained. And obtaining a detection report. According to the invention, the sensitivity and accuracy of sulfur hexafluoride leakage detection can be improved.

The application discloses a high-voltage load-tap switching device and relates to the technical field of tap switches. The high-voltage load-tap switching device comprises a switching mechanism, a driving mechanism and a recovery mechanism. The switching mechanism is used for completing tap switching of high voltage. The driving mechanism provides power for switching of the switching mechanism. In the application, the second moving contact is separated from the second static contact to generate an electric arc before the first moving contact is switched, and the arc is extinguished by triggering a pressure accumulator pump to release sulfur hexafluoride gas. The sulfur hexafluoride gas has the characteristics of cooling, ion removal and flameout prevention, and the arc is quickly extinguished to create an arcless environment for high-voltage switching of the first moving contact, thereby avoiding ablation of the contact by the arc and improving the safety of equipment operation. After the arc is extinguished, the negative pressure pump is triggered by meshing transmission of the internal gear and the rack to suck the sulfur hexafluoride gas in the left cavity into the recovery tank, so that the gas is quickly recovered. The economic loss caused by waste of the gas is reduced, the risk of equipment aging is lowered, and the service life of the equipment is prolonged.

The invention discloses an environment-friendly sealed inflatable switch cabinet, which comprises an integrally formed cabinet body and an equipment main body arranged in the cabinet body, the water tank is arranged on one side outside the cabinet body and used for containing water; two cooling mechanisms are arranged between the cabinet bodies, and the two cooling mechanisms are used for cooling the equipment main body in the cabinet body through the water body in the water tank; a first lifter is arranged on the side, facing the water tank, of the cabinet body, is in driving connection with the two cooling mechanisms and is used for driving the two cooling mechanisms to vertically move in the vertical direction; a second lifter and a temperature detector are arranged on the side, facing the cabinet body, of the water tank, the second lifter is in driving connection with the temperature detector, and the second lifter is used for driving the temperature detector to detect temperature data of all preset areas in the cabinet body in the vertical direction. According to the technical scheme, sulfur hexafluoride gas leakage is avoided to the maximum extent from the two aspects of precise cooling and sealing performance improvement.

The present invention discloses a sulfur hexafluoride gas analysis and tail gas recovery system and control method. The system is provided with a first throttle valve and a negative pressure unit. Under the action of a control module, whether pressure fluctuations or airflow fluctuations occur inside a gas analyzer, the fluctuations can be smoothed by adjusting the opening of the first throttle valve and the air pressure of the negative pressure unit. Therefore, the gas analyzer can detect the target gas under stable air pressure and airflow, thereby ensuring the accuracy of the detection.

The invention provides a catalytic material based on magnetic iron ore and a preparation method and application thereof, the magnetic iron ore is used as an active site center, Portland cement is used as a carrier, water is used as a solvent, and the mass ratio of the magnetic iron ore to silicate is (1-2): (8-9). Magnetic iron ore becomes an ideal active site center of a catalytic material due to good magnetism, catalytic activity and low toxicity. The Portland cement is low in price, easy to obtain and high in stability and is often used as an adhesive or a carrier of various catalysts, the magnetic iron ore and the Portland cement are combined, the adsorption capacity on the sulfur hexafluoride gas can be improved, and then the removal efficiency of the sulfur hexafluoride gas is improved.

The embodiment of the invention discloses a sulfur hexafluoride online purification monitoring device, and relates to the technical field of high-voltage and ultrahigh-voltage electrics. The sulfur hexafluoride online purification monitoring device comprises a tank body, a selective permeable membrane and a purification monitoring assembly, the tank body is provided with an inner cavity, the selective permeable membrane is installed in the inner cavity and divides the inner cavity into a high-pressure side chamber and a low-pressure side chamber, the high-pressure side chamber is communicated with sulfur hexafluoride high-voltage electrical equipment, and the low-pressure side chamber is communicated with the purification monitoring assembly; sulfur hexafluoride in the sulfur hexafluoride high-voltage electrical equipment enters the high-voltage side cavity, the selective permeable membrane allows decomposition products of the sulfur hexafluoride and small air molecules to permeate into the low-voltage side cavity, the purification monitoring assembly monitors and purifies gas in the low-voltage side cavity and then discharges the gas, and the sulfur hexafluoride high-voltage electrical equipment does not need to be powered off. Therefore, the continuous operation in the operation state can be realized.

The invention belongs to the technical field of sulfur hexafluoride leakage detection, and relates to a biological detection method for sulfur hexafluoride leakage based on odorous dogs and GIS space positioning. Comprising the following steps: step 1, selecting dogs and performing special training; selecting dogs with high olfactory sensitivity, taking SF6 gas or equipment operation gas as a target smell source, establishing conditioned reflex through smell-reward training, and inhibiting interference on oil smell and dust; step 2, preparation before field detection; a ventilation system is closed to stabilize the smell, an anti-puncture sheath is arranged for the dog, and a tractor wears high-voltage protective clothing to ensure that the equipment is grounded; step 3, grading detection and accurate positioning; a dog census GIS equipment in a zigzag path, marks a suspicious area through warning, then sniffs key points such as a flange and an insulator in a close range, and remeasures and confirms a leakage point in combination with a portable leak detector. According to the invention, by using the advantages of sensitive smell and strong maneuverability of the odorous dog, the SF6 gas leakage of the GIS / GIL equipment can be quickly, efficiently and accurately positioned.

The present application relates to the technical field of gas monitoring, and is a kind of sulfur hexafluoride gas on-line monitoring system and method, specifically comprising: constructing surface adsorption kinetics equation to obtain the real-time surface adsorption amount of sulfur hexafluoride arc extinguishing decomposition product in the key components of arc extinguishing chamber;According to the thermal ablation term, the metal vapor generation rate is calculated;Establish a physical evaluation model for the influence of the surface adsorption layer in the arc extinguishing chamber on the flow field performance and heat transfer performance, and evaluate the flow field distortion factor and the thermal recovery retardation factor;Combined with the spatial position sensitive weight, the working performance degradation index of sulfur hexafluoride is predicted;According to the working performance degradation index of sulfur hexafluoride, the trigger judgment of sulfur hexafluoride monitoring alarm is carried out.The present application solves the problem that the gradual degradation of sulfur hexafluoride arc extinguishing ability cannot be accurately predicted and early warned in the prior art.

The invention discloses a sulfur hexafluoride gas density and micro-water content on-line monitoring circuit and device, and relates to the technical field of sulfur hexafluoride gas monitoring, and the circuit comprises a first antenna, a double-parameter sensing module and a single-parameter sensing module; the double-parameter sensing module and the single-parameter sensing module are connected with the first antenna. Compared with a traditional sulfur hexafluoride gas leakage monitoring mode adopting a pressure gauge or a density relay, the sulfur hexafluoride gas leakage monitoring device collects temperature data in real time while collecting the pressure of the sulfur hexafluoride gas, the influence of the temperature on the pressure can be compensated, and the monitoring precision and reliability of the density and the micro-water content of the sulfur hexafluoride gas are improved.

The invention discloses a multi-parameter cooperative monitoring method for sulfur hexafluoride insulation equipment, and relates to the technical field of equipment monitoring, original parameters are collected, and the original parameters comprise a sulfur hexafluoride concentration value, a sulfur hexafluoride density value and an original partial discharge signal; performing discharge preprocessing on the original partial discharge signal to obtain a partial discharge signal; constructing a point spread function matrix, and performing sparse reconstruction on the partial discharge signals by combining an orthogonal matching pursuit algorithm to obtain coordinates and discharge quantity of a partial discharge source; based on the sulfur hexafluoride concentration value, the sulfur hexafluoride density value, the coordinates of the partial discharge source and the discharge quantity, threshold judgment is carried out, and a grading early warning result is obtained. According to the invention, the early discovery capability and fault positioning precision of the insulation defect of the large sulfur hexafluoride insulation equipment are obviously improved, and reliable technical support is provided for equipment state evaluation and intelligent operation and maintenance.

The invention discloses a power distribution station house intelligent inspection robot based on an AI large model and a control system thereof, and relates to the technical field of power distribution station house inspection. And a multi-modal large model based on power distribution station house industry data fine adjustment is integrated in the multi-modal data processing module, and the multi-modal data processing module is used for processing and analyzing multi-modal data acquired by the path-finding camera, the distance measuring radar and the inspection information acquisition assembly and outputting an inspection result and a control instruction. According to the invention, the multi-mode large model based on power distribution station house industry data fine adjustment is arranged in the main control assembly, so that intelligent diagnosis and comprehensive pre-judgment of the state of key equipment of the power distribution station house are realized. The robot can fuse and analyze multi-source data such as infrared thermal imaging, partial discharge ultrasonic waves, sulfur hexafluoride gas concentration and the like and identify specific hidden dangers of a power distribution station room such as overheating of a switch cabinet contact, abnormal oil level of a transformer bushing, pollution flashover risk of an insulator and the like, so that targeted early warning and maintenance suggestions are output; and traditional data acquisition is improved into intelligent diagnosis and comprehensive pre-judgment.

The invention discloses a method, a system, a medium, equipment and a product for adjusting gas particulate matters of a sulfur hexafluoride gas insulated switchgear, and belongs to the technical field of adjustment of gas particulate matters of sulfur hexafluoride gas insulated switchgears. The method comprises the following steps: carrying out data preprocessing on obtained gas characteristic data of the sulfur hexafluoride gas insulated switchgear in a fixed time window to obtain preprocessed gas characteristic data, carrying out particulate matter concentration prediction by utilizing a trained gas characteristic prediction model to obtain predicted particulate matter concentration, and calculating a prediction slope; according to the obtained real-time gas flow rate and the real-time pressure of the sulfur hexafluoride gas insulated switchgear, a GPR online learning mechanism is utilized to obtain a self-adaptive particulate matter accumulation threshold value; and if the predicted slope is greater than or equal to a slope threshold value or the predicted particulate matter concentration is greater than or equal to a self-adaptive particulate matter accumulation threshold value, adjusting the gas flow rate of the sulfur hexafluoride gas insulated switchgear by using a GPR-based Bayesian optimization algorithm.

The invention discloses a sulfur hexafluoride gas cylinder inflation system, a sulfur hexafluoride gas cylinder transfer device and a sulfur hexafluoride gas cylinder transfer method.The sulfur hexafluoride gas cylinder inflation system comprises an inflation starting detection assembly, and the inflation starting detection assembly comprises an environment oxygen concentration detection part, an environment sulfur hexafluoride gas concentration detection part, an environment humidity detection part and an environment temperature detection part which are arranged on one side of a gas cylinder; the gas cylinder weight detection part is arranged at the bottom of the gas cylinder; the electromagnetic valve coil leakage current detection part is connected with the electromagnetic valve; the first gas density detection part is arranged at the outlet of the gas filling pipeline; according to the scheme, the electromagnetic valve is accurately controlled to be opened under the safety condition and the necessary inflation condition by monitoring multiple sets of environment data, gas cylinder data and data of the equipment to be inflated, the SF6 gas supplementing work quality is improved, and the safety of personnel and the equipment is guaranteed.

The utility model discloses a spectrum detection device for sulfur hexafluoride gas concentration, which relates to the technical field of sulfur hexafluoride concentration detection and comprises a device main body, a detection probe is arranged outside the device body, an adjusting assembly is arranged on one side of the detection probe, an air inlet pipe is fixedly connected to one side of the device body through an external air pump, and a drainage pipe is fixedly connected to the side, away from the air inlet pipe, of the device body. The detection probe emits laser or infrared light beams to directly penetrate through a gas area to be detected, the concentration is inverted by measuring attenuation of transmission light or reflected light, the position of the detection probe is adjusted through the adjusting assembly so as to adapt to different areas, the sulfur hexafluoride gas concentration can be rapidly inspected and detected in real time, and the practicability of equipment is improved. When leakage is found, the device is switched to a suction mode, gas is sucked into the device body through the gas inlet pipe, the concentration and decomposition products are accurately measured, the two modes can be switched according to detection targets, environmental conditions and maintenance capacity, and various requirements are met.

This application relates to the field of coal mining technology, and provides a method, device, electronic equipment, and medium for detecting air leakage in coal seam group mining faces. The method includes: determining test points in the area to be tested; determining gas collection points on the return airflow of the area to be tested; releasing sulfur hexafluoride (SF6) gas at each test point and collecting the gas at the gas collection points to obtain the test gas; wherein different test points release SF6 gas of different structural types; and determining the air leakage detection result of each test point based on the test gas. This application, by simultaneously releasing SF6 gas of different structural types at multiple test points in the area to be tested and determining the air leakage detection result of each test point based on the collected test gas, can achieve simultaneous multi-source air leakage detection, accurately determine the air leakage situation of each test point in the area to be tested, and improve the air leakage detection efficiency of coal seam group mining faces.

The present invention relates to the field of insulating gases, and disclosed are an insulating gas containing perfluoromethyl sulfide and a use thereof in an insulating or arc-extinguishing power device. The insulating gas is CF3SCF3 or a mixed gas thereof with a carrier gas, and is applied to the field of insulating or arc-extinguishing power devices, and the good insulating performance of the insulating gas can prevent electric arcs from burning through the power devices. The perfluoromethyl sulfide provided in the present application has an insulation strength 1.73 times that of sulfur hexafluoride, has a positive insulation synergistic effect with the carrier gas, has a boiling point of -22°C, and has an estimated GWP only 2.8 times that of carbon dioxide, which is much lower than the GWP (25200) of sulfur hexafluoride. The perfluoromethyl sulfide has the advantages of low GWP, low toxicity, low boiling point and high insulation strength, not only meets the insulation strength required by power device applications, but also ensures extremely low environmental damage, and reduces greenhouse gas emission. The comprehensive indicators of the perfluoromethyl sulfide are superior to those of most existing sulfur hexafluoride alternative gases.

The utility model relates to the technical field of pipeline monitoring, and discloses a GRS pipeline sulfur hexafluoride gas monitoring and impurity removing device which comprises a connecting pipe, a connecting ring is fixedly connected to the inner wall of the left end of the connecting pipe, and a filtering assembly is arranged on one side face of the connecting ring. According to the GRS pipeline sulfur hexafluoride gas monitoring and impurity removing device, the circular-truncated-cone-shaped filter cartridge net enlarges the filtering contact area and is combined with the airflow optimization design of the spiral flow guide groove, impact of turbulent flow on the filter net is effectively reduced, it is ensured that gas passes through the filter net efficiently, meanwhile, the purpose of filtering the gas is achieved, and a pushing piece can be driven by bevel gear transmission to achieve the purpose of filtering the gas. Attached impurities can be peeled off in real time, the filter screen is prevented from being blocked, the manual maintenance frequency is greatly reduced, and the problems that a traditional static filter screen is prone to dirt accumulation and needs to be frequently shut down for cleaning are solved; a control monitoring host of a pressure sensor and a temperature sensor can sense the pressure difference and the gas state of the two sides of the filter screen in real time; and the automatic cleaning effect is achieved.