233results about How to "Eliminate the risk of accidents" patented technology

A suture insertion device (120) includes a shaft (124), which is adapted to be inserted into a body cavity (154). First and second needles (160) hold respective first and second ends of a suture thread (122). First and second needle guides (130) are attached to the shaft and respectively hold the first and second needles. The needle guides have a first operative configuration in which the needle guides are held parallel to the axis of the shaft for insertion of the shaft into the body cavity and a second operative configuration in which the needle guides are deployed outward from the shaft within the body cavity so as to point the needles in a proximal direction. An ejector (164) is operative to eject the needles from the needle guides in the second operative configuration so as to cause the needles to penetrate tissue (156) adjoining the body cavity.

A suture insertion device (120) includes a shaft (124), which is adapted to be inserted into a body cavity (154). First and second needles (160) hold respective first and second ends of a suture thread (122). First and second needle guides (130) are attached to the shaft and respectively hold the first and second needles. The needle guides have a first operative configuration in which the needle guides are held parallel to the axis of the shaft for insertion of the shaft into the body cavity and a second operative configuration in which the needle guides are deployed outward from the shaft within the body cavity so as to point the needles in a proximal direction. An ejector (164) is operative to eject the needles from the needle guides in the second operative configuration so as to cause the needles to penetrate tissue (156) adjoining the body cavity.

The invention relates to a nitrogen closed cycle drying and solvent recovery system comprising a dryer, a condensing device, a solid-gas separator, a circulating fan, a nitrogen heater, a solvent recovery tank and a nitrogen supply pipe, wherein the dryer is a fluidized bed dryer; an exhaust outlet of the fluidized bed dryer is connected with an air inlet of the condensing device through a pipeline; an air outlet of the condensing device is connected with the solid-gas separator; an air outlet of the solid-gas separator is connected with the circulating fan; air output by the circulating fan is delivered to the nitrogen heater for heating, and heated nitrogen is delivered to the dryer; a solvent collection opening of the condensing device is connected with the solvent recovery tank; cooling mediums of the condensing device and the solvent recovery tank are provided by cooling liquid supply pipes; and a feed port of the fluidized bed dryer is provided with a material seal type screw feeder. The invention realizes the production of a fluidized drying industry with continuous feeding and discharging and the recovery of an organic solvent without waste gas and water discharge and is beneficial to environmental protection.

The invention discloses a safety management method based on dynamic quantitative accident risk prediction, and the method comprises the following steps: an accident predicting platform is provided, and a basic event dynamic predicting model and an accident analyzing model are established; the accident predicting platform detects state information of production units in real time, and failure information is obtained; then the basic event dynamic predicting model predicts the failure information to obtain basic event dynamic probability; then the accident analyzing model calculates the basic event dynamic probability to obtain the current accident risk probability of the production unit; then the current accident risk probability and a preset risk probability control criterion are compared, if the accident risk probability is more than the risk probability control criterion, a preset emergency plan is started to assist an executor to tackle the accident; if not, a preset standard working flow is started, and a warning message is emitted so that the executor can correct a mistake. The method and the system can reflect the influence of dangerous factor change on probability dangers in real time, thus really realizing the safety management idea of prevention first.

The invention discloses a normal aircraft brake system. The normal aircraft brake system comprises a travel switch, a hydraulic brake valve, an electric valve, an electro-hydraulic servo valve, an antiskid control box and a speed sensor, wherein the hydraulic brake valve is mounted near a pedal mechanism below a cockpit baseplate; and the antiskid control box is mounted in a main gear cabin. The travel switch controls the on / off of the electric valve; and the electric valve is mounted on a hydraulic pipeline at the downstream of the hydraulic brake valve. The electro-hydraulic servo valve is mounted on a hydraulic pipeline at the downstream of the electric valve. The normal aircraft brake system can satisfy the increasing take-off line brake requirement of a traditional normal aircraft brake system, is reasonable in structure, simple and feasible, accords with the ergonomic principle, facilitates to relieve the driver burden, and can eliminate the accident potential due to communication of a take-off line brake switch caused by wrong actions.

The invention provides a vehicle-driving control method for intelligent fault diagnosis and driving behavior analysis, comprising the following steps of: reading a fault code inside an electronic control unit of an engine of a vehicle and analyzing the fault code into fault information of the vehicle by connecting a microcontroller with a vehicle diagnosis interface through a K line driver, and displaying the vehicle fault information on an LCD (Liquid Crystal Display) screen of a man-machine interaction unit; acquiring real-time state information of the vehicle by connecting the microcontroller with the vehicle diagnosis interface through a CAN (Controller Area Network) driver, and storing the acquired real-time state information into a data storage according to a fixed format; copying data stored in the data storage into a USB flash disk through a USB interface so as to carry out data analysis by application software matched with a device, and providing a driving behavior analysis result. The invention realizes the real-time data acquisition and storage functions of the integral vehicle so that the bad driving behaviors of drivers are corrected in time, also provides real data foundation for accurate fault maintenance and ensures that the comparison of real oil consumption and oiling quantity is evidence-based by providing a display function of a regional total oil injectionquantity.

The invention discloses a normal brake system used for an airplane and having take-off line brake capability. The normal brake system comprises a hydraulic brake valve, an electric valve, an electro-hydraulic servo valve, an anti-slip control box, a hydraulic switch and a speed sensor, wherein the hydraulic brake valve is mounted near a pedal mechanism under a bottom plate of a cockpit, controlled by operation of stepping on a brake pedal by a pilot and used for outputting a required brake pressure; the electric valve is mounted on a hydraulic pipeline at the downstream part of the hydraulic brake valve; the electro-hydraulic servo valve is mounted on a hydraulic pipeline at the downstream part of the electric valve; the anti-slip control box is mounted in a main landing gear cabin and powered by a power supply on the airplane; the hydraulic switch is mounted on a hydraulic pipeline between the hydraulic brake valve and a first oil inlet of the electric valve. The normal brake system can meet a braking demand of an existing normal brake system of the airplane on a take-off line, is reasonable in structure, simple, convenient, feasible, consistent with a man-machine engineering principle and favorable for reducing the burden of the pilot, and eliminates accident potentials caused by false operation of switching on a take-off line brake switch.

The invention belongs to the field of the preparation of metal materials, and particularly relates to an auxiliary semi-continuous casting crystallizer for a low-frequency pulsed magnetic field of magnesium alloy and application thereof. The top of a casing of the crystallizer is provided with an upper cover of the crystallizer, the casing of the crystallizer and the position of a center hole of the upper cover of the crystallizer are provided with an inner sleeve of the crystallizer, a cooling water tank is formed between the casing of the crystallizer and the upper cover of the crystallizer, an excitation coil is arranged in the cooling water tank, the outer side of the casing of the crystallizer is provided with a water inlet communicated with the cooling water tank, and a secondary cooling water spraying hole communicated with the cooling water tank is arranged on the inner sleeve of the crystallizer. The casing and the upper cover of the crystallizer are made of stainless steel, and the inner sleeve of the crystallizer is made of a 4XXX family of aluminum alloy; and moreover, an upper opening of the inner sleeve of the crystallizer is higher than the upper surface of the upper cover, and a horn shape is formed between the upper opening and a lower opening. The auxiliary semi-continuous casting crystallizer for the low-frequency pulsed magnetic field of the magnesium alloyis used for the semi-continuous casting of the magnesium alloy, the forced convection of a melt is generated by utilizing pulsed electromagnetic force generated by the auxiliary semi-continuous casting crystallizer for the low-frequency pulsed magnetic field of the magnesium alloy to act on the melt of the magnesium alloy inside the crystallizer, bulky dendritic crystals are fragmented, the nucleation rate is increased, and the thinning effect of the crystal grains of a semi-continuous cast rod of the magnesium alloy is obvious.

An airplane hydraulic brake system comprises a hydraulic brake valve, a liquid-controlled conversion valve, an electro-hydraulic servo valve, an anti-slide control box and a speed sensor. The liquid-controlled conversion valve is mounted on a downstream hydraulic pipeline of the hydraulic brake valve, the electro-hydraulic servo valve is mounted on a downstream hydraulic pipeline of the liquid-controlled conversion valve, an electrical interface of the electro-hydraulic servo valve is electrically connected with the anti-slide control box through a shielding insulation wire, an oil inlet of the electro-hydraulic servo valve is in pipeline connection with an oil outlet of the liquid-controlled conversion valve, a brake opening of the electro-hydraulic servo valve is in pipeline connection with an oil inlet of a brake device of a brake airplane wheel, and an oil returning opening of the electro-hydraulic servo valve is in pipeline connection with an airplane oil returning pipeline through a hydraulic filler neck and a guide pipe. The airplane hydraulic brake system can meet the ever-growing airplane take-off line brake requirement, is reasonable in structure, easy and convenient to implement, and beneficial for reducing of burdens of a driver, conforms to the man-machine engineering principle and meanwhile the accident potentials caused by false-operation switching on of a take-off line brake switch are eliminated.

The present invention relates to a cutter holding device which is provided with a cutter receiving part, especially a clamping disc, such as a thermal shrinking chuck, a nipper chuck, a hydraulic expanding chuck and a high-precision chuck. The handle of cutter, especially the handle of rotating cutter is accommodated in the cutter receiving part, wherein the cutter holding device comprises a pulling-out preventing fixing device which fixes the cutter and prevents the axial pulling-out. The pulling-out preventing device comprises at least one fixing component and at least one fixing groove which is corresponding with the fixing component and accommodates the fixing component. The fixing component cooperates with the fixing groove with a mode of forming locking. According to the invention, the fixing component and the fixing groove are all designed to at least partial sphere-head shaped. Preferably the cutter is provided with the locking groove. As the fixing groove is preferably spirally rotating along the cylindrical handle of cutter, the rotation direction is corresponding with the slotting direction of cutter, and axial fixing can be executed to the cutter. Thereby the cutter will not be axially pulled out from the cutter holding device in the running period. A component for exerting force is additionally installed. The component forms a gapless attachment on the pulling-out preventing fixing device after shrinking and installation.

The invention discloses a distribution engineering construction intelligent integrated management system, which comprises a data acquisition layer, a data processing and storage layer and an application layer. Among them, the data acquisition layer collects the data of the units involved in the power distribution project; data processing and storage layer is responsible for data cleaning, conversion, storage and storage; the application layer is the intelligent management software of distribution project. The invention designs a scientific, safe and efficient distribution project management system combined with a big data cloud platform, which can intelligently overall manage each project participant in a distribution project construction, realize the construction information safety sharing of each participant, and efficiently promote the project construction process.

The invention discloses a straight rotary linkage core puller for an injection mold of an elbow product, comprising a recurved loose core (1), a connecting bar (2), a straight inside loose core (3), a straight outside loose core (4), an inclined guide slider (5), a lag bar (6) and an inclined guide pillar (7). The invention utilizes the technical scheme that the rotary core puller composed of therecurved loose core, the connecting bar, the straight inside loose core and the straight outside loose core is adopted, the straight inside loose core and the straight outside loose core are straightly pulled out in a segmentation mode successively by the inclined guide slider and the lag bar, and the connecting bar pulls the recurved loose core to pull cores rotatably, thus overcoming the problems and shortcomings of flanging on the outer walls of the product, much occupied labor, large working strength, low efficiency, high cost and latent accident potential in the prior art. By the provided straight rotary linkage core puller for the injection mold of the elbow product, automatic core pulling and demolding of the injection molding of the elbow product can be realized, thus achieving the purposes of removing flanging on the outer walls, reducing labor, lightening working strength, improving the production efficiency, lowering the cost and eliminating the accident potential.

The invention provides a method for recovering titanium from red mud slag. The method comprises the following steps of recovering iron from red mud, solid waste of aluminum oxide production, mixing the slag after iron recovery and concentrated sulfuric acid for sulfating roasting, draining water to form a mixed solution containing metatitanic acid, adding ammonia water to remove aluminum to purify a titanium solution, hydrolyzing to crystallize and precipitate metatitanic acid, roasting metatitanic acid to form titanium dioxide, and successfully recovering the titanium from the red mud reduced iron slag. The method takes the ironmaking slag of the red mud, the solid waste of the aluminum oxide production, as a raw material, a technology is simple, a recovery rate is high, the comprehensive utilization of red mud is achieved, the cost related to red mud stockpiling is lowered, and the influence on an environment and accident potential caused by the red mud stockpiling are eliminated. The titanium recovery rate can reach above 70%, and the obtained product, titanium dioxide, is high in purity and good in quality.

The invention relates to a salt mine double-well solution mining method, in particular a salt mine double-well solution mining method. In the method, injection holes are formed on two sides of the bottom of an under central pipe in a vertical well; in a double well production process, part of clean water is separated and injected into the central pipe in the vertical well when the clean water is injected into a horizontal well, so that the clean water flows into a casting from the injection holes of the central pipe in the vertical well to dilute oversaturated brine in the casting in the vertical well; and the injection water flow in the central pipe of the vertical shaft is displayed and monitored by an electromagnetic flowmeter, so the concentration of the brine discharged from the vertical well can be controlled accurately. The method has the advantages that: 1, the concentration of the brine discharged from the vertical well in a double-well solution mining process can be accurately controlled; 2, the concentration of the brine discharged is prevented from being overhigh in a production process so as not to arouse crystallization and block the underground casting or a ground brine return pipe, and thus, the safe, continuous and high-efficiency production capacity of the salt wells is improved; and 3, as a large amount of high-pressure clean water is injected into the central pipe in the vertical well to wash the underground casting in the vertical well and the ground brine return pipe, the crystallization or scaling on the pipe wall can be prevented, potential accidents are eliminated, and well repair times and cost can be reduced greatly.

The invention discloses an engine torque control method capable of improving the start performance of a whole vehicle, and belongs to the field of control technology. The technical proposal is that the method can detect high position clutch switching signal, the low position clutch switching signal, the neutral position signal and the vehicle speed signal of a vehicle in real time; only when the clutch is detected to be between a totally disengaged state and a half clutch state, the gear of a gear box is not in a neutral position, and the vehicle speed is less than a preset threshold value, the vehicle is judged to be in a starting working condition; at the moment, the output torque value of an idle speed controller is enlarged by raising the idle speed of an engine through idle speed compensation, then the output torque of the engine is enlarged, and the smooth start of the vehicle is realized. The method can accurately determine the starting working condition of the vehicle according to the high position clutch switching signal and the low position clutch switching signal, effectively avoids misjudgment of the starting intention of a driver, improves the start performance of the vehicle, eliminates accident potentials caused by sudden movements of the vehicle, and improves the driving safety of the vehicle.

The invention relates to a system of managing undermine worker and emergency searching people, belonging to the technique of electric information, which can solve the problems of present mine that without emergency search function. wherein, the wireless data collector uses wireless sensor to automatically collect the information sent from wireless data sender; said information via the transmission network is transmitted to the information process center; via data processing unit, said information will be displayed on the display unit; the emergency calling unit via started by person will send information; handle data collector can collect said information via wireless sensor to find the position of emergency calling unit. The invention can real-time find the dynamic distribution of undermine workers, and use the handle data collector to accurately search for the position of data sender.

The invention provides a device and a process adopted for rod-making by continuous casting and continuous rolling of red impure copper. The device adopted for rod-making by continuous casting and continuous rolling of red impure copper comprises a launder which tilts upwards and is provided with an electromagnetic field, and deoxidizer is contained in an inner wall of the launder. According to the process for the rod-making by the continuous casting and continuous rolling of red impure copper, on the basis of a prior rod-making process by continuous casting and continuous rolling of red impure copper, after steps of melting, oxidization and restoring, impurities are removed and oxygen content is lowered by further refining, and casting is carried out to increase surface quality, conductivity, plasticity and tensibility of a copper rod. The surface quality, conductivity, plasticity and tensibility of the copper rod manufactured by the device and the process provided by the invention are more excellent, and manufacturing cost is low.

The invention discloses a method for preciously detecting / monitoring the residual thickness of a metal pipeline or a pressure container after local corrosion based on a field fingerprint technique. The method comprises the following steps: obtaining a sampling voltage through using a measure electrode probe matrix and a reference electrode, calculating according to the sampling voltage to obtain a field fingerprint coefficient FC, sequentially calculating pipeline resistance values of positions in which all probes are positioned, calculating current values of all resistors, calculating a current value of a column in which a resistance change appears to an adjacent column, and finally calculating the residual thickness of the pipeline or the pressure container after local corrosion. The method greatly improves the detection precision, can be used for certainly calculating the residual thickness after the local corrosion, has a higher precision than present common methods, can realize more reliable results than the present common methods, and provides reliable bases for the determination of hidden accident troubles caused by the corrosion.

The invention provides a high-strength nylon formula for a blower impeller and a preparation method thereof. Base stocks of the formula comprise caprolactam and laurolactam. Besides, glass beads undergoing activation treatment are added in the base stocks to improve the wearability. Meanwhile, a certain amount of plasticizer, dispersant, lubricant, buffering agent, antioxidant, catalyst and cocatalyst are added. During the pouring and molding, balanced pressurization is carried out so as to improve physical and chemical properties. The invention realizes once pouring and molding, easy batch production, low cost, light weight and energy consumption reduction. The impeller is an integrated body, does not need the welding of components, has strong wearability and good safety. The nylon can be substituted for steel, aluminum and other metal materials in the preparation of the blower impeller.

The invention relates to a penetrant for coal-bed flooding. The penetrant comprises the following components by weigh percent: 0.01%-0.10% of sodium dodecyl sulfate, 0.01%-0.10% of sodium diisooctylester sulfosuccinate, 0.01%-0.10% of dodecylbetaine, 0.01%-0.10% of sodium oleoyl methyl ethanesulfonate, 0.1%-1.0% of calcium chloride and the balance of water. By using the penetrant for coal-bed flooding in the invention, the problems that a coal bed is not easily wetted and penetrated by water can be effectively solved, the efficiency of coal-bed flooding is improved, the flooding amount, wetting radius and flooding speed of the coal bed are greatly improved, the production amount of working face coal dust is effectively reduced, accident potential is eliminated, and coal mining efficiency is improved.

The invention belongs to the technical field of high-voltage power supply control and particularly relates to a method and a device for electrically controlling a high voltage circuit breaker to switch on or switch off. According to the technical scheme, the high-voltage circuit breaker is controlled by a contact signal of a control system to switch on or switch off, i.e., the control system drives to lead the circuit breaker to switch on, and the control system stops driving to lead the circuit breaker to switch off, particularly, the control system is not directly drive the coil of the circuit breaker for switching on or switching off, but control an intermediate relay, an on-delay relay and an off-delay relay, the three relays act to generate a switching-on short-time pulse signal and a switching-off short-time pulse signal with the time being adjustable from 1 to 60 seconds, thus ensuring that a distributed control system (DCS) can be switched off by the high-voltage circuit breaker in a failure and preventing the coil for switching on or switching off from being burnt up after being live for a long time. The invention has the characteristics of operation reliability, potential risk elimination and high operability and skillfully combines the advantages and overcomes the disadvantages in the prior art, thus ensuring that the DCS can be switched off by the high-voltage circuit breaker in the failure and preventing the coil for switching on or switching off from being burnt up after being live for a long time.

The invention relates to a stress monitoring device that includes stress sensing unit made up from stress transforming structure, information transforming structure, scanning driving structure and location restricting structure and information gathering processing unit. It is a convenient, high accuracy, and could monitor the inner stress of the rock mass in real time, and could automatically tele-monitoring. It could be widely used in exploiting coal mine, construction, irrigation works, road, tunnel and underground engineering.

The invention relates to a method for detecting internal fault of SF6 electrical equipment by using a gas chromatograph, comprising the following steps: a stainless steel tube filled with 60-80 meshes of GDX-301 stationary phase is firstly selected as a chromatographic column, then 50mL of SF6 gas sample is extracted from the SF6 electrical equipment in the field for later use; the chromatographic column is placed in the gas chromatograph, hydrogen is selected as carrier gas, and working conditions of a TCD (thermal conductivity detector) in the gas chromatograph is set; the chromatograph is demarcated; 0.5mL of gas sample is selected and the gas sample is injected into the chromatograph through an injection port of the chromatograph with the use of an injector, the computing mode of the chromatograph is selected, and then the gas sample is identified whether H2S or SO2 exists or not by the TCD after the gas sample is separated by the chromatograph and the contents of H2S and SO2 gases are automatically calculated; and the result is analyzed. The invention adopts gas-solid chromatography and has the advantages of good stability, less gas consumption, ready-for-detection and high accuracy, etc. The method is easy and feasible and has low detection cost. The invention provides simple and effective means for early detection of the internal fault of the SF6 electrical equipment and in-time elimination of hidden dangers.

The invention relates to a control method and device for Hill Descent Control (HDC) of an electric vehicle and the electric vehicle. The control method comprises determining whether the electric vehicle goes into an HDC state, determining whether a high-voltage battery of the electric vehicle can be charged, and supplying electric energy generated by a generator to electronic devices in the electric vehicle and / or controlling a bleeder resistor in a motor controller to go into a heating state when the high-voltage battery can not be charged. By supplying the electric energy generated by the generator to the electronic devices in the electric vehicle and / or controlling the bleeder resistor in the motor controller to go into the heating state when the high-voltage battery can not be charged after determining that the electric vehicle goes into the HDC state, the control method and device for HDC of the electric vehicle has the advantages of maximizing the energy recovery of the electric vehicle on a ramp, reducing the burden on a braking system, eliminating hidden accidents caused by overheating of a brake and solving the problem of waste because the electric energy generated by the generator in the electric vehicle can not be effectively used when the high-voltage battery can not be charged.

The invention relates to an antistatic silica gel composition which comprises the following components in percentage by weight: 45-80 percent of methyl vinyl gum, 15-50 percent of white carbon black, 1-4 percent of hydroxy silicone oil, 0.2-1.6 percent of hydrogen-contained silicone oil, 0.1-0.5 percent of demolding agent and 0.1-4 percent of antistatic agent, wherein the antistatic silica gel composition is prepared through the following steps of: proportionally adding the methyl vinyl gum, the hydroxy silicone oil, the hydrogen-contained silicone oil and the demolding agent into a vacuum kneader for kneading; then adding the white carbon black in batches and then adding the next batch of white carbon black after the last batch of white carbon black is fully agglomerated; after all the raw materials are agglomerated, opening nitrogen, introducing steam, heating and keeping the constant temperature for 1-2 hours at the high temperature of 160-170 DEG C; and then reducing the temperature, proportionally adding the antistatic agent in the temperature reducing process, stirring for 30 minutes to 1 hours, discharging after the temperature is reduced to 60-80 DEG C and then filtering through a rubber filter press to obtain the antistatic silica gel composition after a sizing is cooled. Thereby, the invention has good antistatic effect and can be widely used for working occasions with higher static requirements.

The invention discloses a fire monitoring alarm system based on internet of things. The system comprises a server and a plurality of monitoring devices connected with the server, wherein each monitoring device comprises a central processing unit (CPU), a wireless transmission module, a sensor and a sound-light alarm module; the sensor is used for detecting temperature, smog and harmful gas information of a 380V power input wire and transmitting the information to the CPU; the CPU is used for judging the received information and transmitting the judgment result to the server through the wireless transmission module; and if the received information contains alarm information, the alarm module transmits alarm information. By installing the monitoring alarm system, the quality and the efficiency of maintenance and management can be improved, and the aim of comprehensive monitoring is fulfilled; and the system has the characteristics of stable performance, low manufacturing cost, convenience in operation and the like.

Exterior cleaning machine in wind turbine-towers, which is coupled to lifting means (7) in a parallel direction in relation to the outer surface of a mast (1) of a wind turbine, and wherein said machine comprises at least one flexible roller (2a, 2b) configured to come in contact with part of the surface of a mast (1) of a wind turbine, a plurality of magnets (3) facing part of the outer surface of the mast (1) and configured to attract the machine with regard to said mast (1) via magnetic phenomena; at least one tank (4a, 4b) configured to receive a cleaning product; a plurality of rolling means (5) between the structure and said mast (1); and remote control means (6) of the lifting motion of said machine associated with lifting means (7).

The invention discloses a new-type static-free electricity rubber pad, belonging to the technical field of static-free electricity rubber mat. The weight part compositions of ingredients of the static-free electricity rubber mat are as follows: 28-31 shares of nitrile rubber, 1.2-1.6 shares of zinc oxide, 0.35-0.50 shares of stearic acid, 0.8-1.2 shares of engine oil, 3.0-4.0 shares of dioctyl, 0.3-0.8 shares of sulfur, 0.8-1.4 shares of accelerant, 11-15 shares of carbon black, 2.5-3.5 shares of white soot, 0.7-1.0 shares of xylene resin, 2.6-3.2 shares of light calcium and 0.5-0.85 shares of vesicant. The invention is made by common technique. The invention has good static-free electricity effects and can be applied on occasions where high requirements on static electricity are needed, so as to guard against the bad effects of static electricity and potential dangers.

The invention relates to a method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment. The method is characterized by comprising the following steps of: judging whether the faults occur or not and determining the types of the faults according to product components generated after the faults of the electrical equipment insulated by the mixed gas of c-C4F8 and N2 or CO2or CO or CF4 occur, and if only C2F4 gas and C3F6 gas are detected, indicating that the overheating faults of the equipment occur; if C2F6 gas, the C2F4 gas, C3F8 gas and the C3F6 gas are detected simultaneously, indicating that the discharging faults of the equipment occur; and judging whether the faults are serious and needed to be maintained or not according to the change condition of the content of products.

The invention belongs to the field of geological environment, and particularly relates to an ecological treatment method oriented to geological environment disasters caused by riverway goafs. The ecological treatment method oriented to geological environment disasters caused by riverway goafs includes the following steps that firstly, the geology of a sand excavation area is observed, the geological environment of the riverway goafs is analyzed, and soil property parameters are determined according to the range and the shape of sand excavation hanging-in-air caves; secondly, the destructing mode of the disasters in the riverway goafs is determined, and the long-time sinking rule and the action mechanism of the hanging-in-air caves are determined; thirdly, the sinkage of the HuLu caves is controlled with a filling grouting method. The geological environment of the riverway goafs is treated ecologically with the method, an optimum method is obtained through on-site exploration, analytic demonstration, theoretical analysis and filling experiments, potential danger of accidents is eliminated, and the method has extensive application prospects and promotional value for guaranteeing smoothness and safety of riverways, reducing geological environment disasters and maintaining ecological balance and has great social and economic benefits.