184results about "Material exposibility" patented technology

The invention discloses an amino mixed fuel explosion characteristic visualization and explosion suppression coordinated regulation and control system and method, and the system comprises an explosion suppression device which is disposed in a combustion chamber and is in communication connection with a holographic monitoring device and an explosion overpressure real-time prediction model. A graded explosion suppression scheme is set according to the safety early warning grade, so that active intervention of explosion suppression intensity and mode matched with combustion or explosion development stages with different intensities in the combustion cavity is implemented. Therefore, visualization of the mixed gas combustion and explosion dynamic process under the multi-parameter coupling condition can be achieved, and the comprehensiveness and reliability of combustion and explosion research are remarkably improved; through real-time monitoring and intelligent prediction of the explosion process, the explosion process in the device can be rapidly started, the explosion suppression response can be optimized, the explosion development can be suppressed, the integrity and operation safety of an experiment system can be guaranteed, and the intrinsic safety and the system protection capability of the experiment process can be effectively enhanced.

The invention discloses a transformer arc fault equivalent test device and a control method, and relates to the technical field of power equipment fault simulation and safety test, and the method comprises the steps: carrying out the corresponding high-pressure gas storage through a high-pressure gas storage unit according to target pressure data calculated by a choking flow dynamic coupling model; the quick release unit is used for matching fault duration according to the test trigger instruction so as to release the high-pressure gas stored in the high-pressure gas storage unit; the energy injection unit injects high-pressure gas into the test oil tank to form shock waves; the safety protection unit starts an interlocking protection mechanism based on the test data; the monitoring control unit controls each unit to act, monitors the operation process of each unit in real time, and obtains and identifies the validity of test data to optimize the test process; according to the invention, automatic test process control is realized, the arc fault key damage effect can be accurately quantified and reproduced, high-precision matching of pressure wave time domain characteristics is realized, and the reliability of a test result is ensured.

The invention discloses an explosive wave simulation device and method based on gas combustion driving, and solves the problems that in the prior art, electric heating energy consumption is large, a gas detonation method generates detonation waves and an extremely high pressure peak value, the waveform of shock waves is affected, and pressure bearing of equipment is challenged. The explosive wave simulation device based on gas combustion driving comprises a combustion driving section, a contraction and expansion section, a driven section, an ignition device arranged on the combustion driving section and a diaphragm arranged between the driving section and the contraction and expansion section. Combustible mixed gas is contained in the combustion driving section, a shape adjusting cushion block is embedded in one end of the combustion driving section, the radial sectional area of the inner space of the shape adjusting cushion block is sequentially increased from one end to the other end in the axial direction, and the other end of the combustion driving section is connected with the inlet end of the contraction and expansion section. An ignition opening is formed in the combustion driving section; the outlet end of the contraction and expansion section is connected with the opening end of the driven section; an ignition head of the ignition device penetrates through the ignition opening; and the driven section is used for installing to-be-tested equipment.

The invention discloses a dust explosion flame free radical testing system and a testing method, belongs to the technical field of dust explosion testing, and solves the problem that existing testing equipment cannot realize visual testing of combustion flame free radicals at the initial stage of dust explosion ignition and in the development process. According to the solution, the test system comprises an explosion generation assembly used for generating single-side open type dust cloud explosion, an optical observation assembly used for observing flame free radicals, a control system, a computer and an air compressor, and semi-open type dust cloud is formed through the explosion generation assembly and is ignited and detonated; images of different free radicals changing along with flame are collected through the optical observation assembly, and visual observation, recording and analysis are carried out through the computer. The system has the advantages of being high in functionality, integrated in system, easy to operate and safe and reliable in experiment process and is suitable for various kinds of combustible dust, collected data can promote dust explosion mechanism research, and data support is provided for development of dust explosion optical early warning protection measures.

The invention discloses a thermal runaway characteristic testing device for a soft package power lithium battery for aviation, and relates to the field of lithium ion battery detection devices. The thermal runaway characteristic testing device for the soft package power lithium battery for aviation comprises a thermal runaway cabin, an explosion cabin and a conveying pipe, the conveying pipe is used for discharging a mixture in the thermal runaway cabin into the explosion cabin, observation doors are rotationally connected to the thermal runaway cabin and the explosion cabin, the thermal runaway characteristic testing device further comprises a placing plate located in the thermal runaway cabin, and the placing plate is used for placing the lithium battery; the clamping device is mounted on the placement plate, and the clamping device is used for clamping and fixing four corners of the lithium battery; the electric telescopic cylinder is installed on the thermal runaway cabin, and the telescopic end of the electric telescopic cylinder is located in the thermal runaway cabin; the lithium battery is stably fixed through the accurate corner clamping device, puncture and transverse plane structure reservation can be synchronously completed by matching with the puncture needle with the hollow cavity, and the structural collection integrity and the cabin sealing performance are guaranteed by combining the double electromagnetic adsorption rings and the sealing plate.

The invention discloses a simulation device and method for simulating goaf coal spontaneous combustion induced gas explosion, and belongs to the technical field of goaf gas explosion simulation. The simulation device comprises an explosion cavity body, a region control system, an explosion simulation system, an environment simulation system, a monitoring system and an intelligent control system; the area control system is used for dividing the space in the explosion cavity to form an explosion area and a non-explosion area at different positions; one end of the explosion simulation system is connected to an explosion area in the explosion cavity through the bottom of the explosion cavity; the environment simulation system is used for injecting gas needed by detonation of the explosion simulation system into the explosion area and injecting gas used for simulating the internal environment of the goaf into the non-explosion area. The monitoring system is used for measuring a gas explosion process in an explosion area and data change conditions of temperature, gas concentration and pressure characteristics of a coal face; according to the invention, the influence of gas explosion at different positions of the goaf in the explosion cavity on the coal face can be simulated.

The invention discloses a gas-solid two-phase explosion venting dynamic inhibition experiment system and method, and belongs to the field of explosion venting, and the gas-solid two-phase explosion venting dynamic inhibition experiment system comprises an explosion container, a gas distribution system, a dynamic ignition system, a data acquisition system, a dynamic water mist / powder explosion inhibition system and a computer. The dynamic water mist / powder explosion suppression system comprises a water inlet block which is movably clamped on the inner wall of the upper side of the explosion container, can move along a second strip-shaped hole in the wall and is sealed. The flat plate part is connected with a water inlet pipe (extending out of the container), and a cavity is formed in the flat plate part; and a third rubber ring is arranged at the arc plate part to seal the rotator. The water inlet block is communicated with the rotator through a first through hole and a second through hole respectively, and a water mist / powder sprayer is arranged at the lower end of the rotator. The water inlet block is provided with a support which is provided with a driving structure to enable the rotator to rotate. According to the device and the method, the difference between dynamic explosion suppression and static explosion suppression can be explored, and the coupling effect between dynamic explosion suppression and the explosion source position can be explored.

The utility model discloses an improved gas dust explosion pipeline testing device in the technical field of gas dust explosion testing, which comprises an explosion ignition assembly and a data acquisition control assembly, the other side of the explosion ignition assembly is respectively provided with a dust spraying assembly and a product collecting assembly, and the product collecting assembly comprises a closed control valve. The side, away from the explosion ignition assembly, of the closed control valve is connected with a gas taking control valve and a vacuumizing control valve, the end, away from the closed control valve, of the gas taking control valve is sequentially connected with a dust collector and an air bag, and the end, away from the closed control valve, of the vacuumizing control valve is connected with a vacuum pump. According to the utility model, the closed control valve, the gas taking control valve, the dust collector, the air bag, the vacuumizing control valve and the vacuum pump are arranged in a matched manner, so that gas can be collected by the air bag, powder can be collected by the dust collector, the problem that explosion gas and powder are difficult to automatically collect is solved, and the content of experimental research is widened.

The invention relates to a method and a system for testing explosion characteristics of metal dust in an SF6 gas environment. The system comprises the following steps: acquiring a metal dust sample with preset mass; plate electrodes are arranged at the top and the bottom in a gas insulation test cavity respectively, and the metal dust sample is flatly laid on the plate electrode at the bottom of the gas insulation test cavity; the gas insulation test cavity is vacuumized and then filled with SF6 insulation gas; voltage is applied to the plate electrode in a preset mode, so that a controllable electric field is formed in a dust space concentration area, and a physical signal representing discharge is synchronously monitored; and iterating the process by increasing the mass of the metal dust sample until a physical signal indicating explosion or breakdown is monitored, stopping iteration, and recording the current voltage value and the corresponding concentration of the metal dust sample to obtain the explosion triggering critical condition of the metal dust in the insulating gas environment.

The invention relates to a test system and method for characterization of a sympathetic detonation multi-physical coupling effect field, belongs to the technical field of near-field explosion impact tests, and solves the problem of inaccurate characterization of a charging sympathetic detonation effect field in the prior art. The device comprises a to-be-tested charging module, a fragment group size and quantity analysis module, a fragment group speed measurement module, an explosive shock wave overpressure test module and a sympathetic detonation visual characterization module, the fragment group size quantity analysis module is used for acquiring the load penetration perforation quantity and perforation area of the near-field fragment group; the explosion shock wave overpressure test module is used for testing a near-field explosion shock wave overpressure parameter; the fragment group speed measurement module is used for measuring near-field dense fragment group speed parameters; and the sympathetic detonation visualization characterization module is used for measuring the dynamic response process of the sympathetic detonation test. According to the invention, the test of the multi-physical coupling effect field in the charge sympathetic detonation process is realized.

The application is a kind of medium internal acceleration testing device. It comprises a carrier, a cover, a support assembly and a hanging sleeve assembly. The carrier is used for fixing and installing an acceleration sensor. The cover is buckled on the carrier. The support assembly comprises a base plate fixed on the top of the cover, a micro power source installed on the base plate and a plurality of lifting rods hinged to the base plate. A through slot is formed on the base plate. The micro power source can drive the plurality of lifting rods to pivot and abut against the inner wall of the hole to be finally fixed. The hanging sleeve assembly is used for being clamped by a clamp. It is connected with the base plate through a pulling assembly and can be separated from the clamp downward during the abutting process of the plurality of lifting rods and the inner wall of the hole. The acceleration sensor plays a role of isolation and protection. It will not be invaded by liquid in the medium inside. The sensitive surface of the acceleration sensor can be determined outside. The sensitive surface of the acceleration sensor points to the explosion with high stability. The filling material is not easy to deviate.

The utility model belongs to the field of gas distribution tests, and particularly relates to a multifunctional gas distribution test device which comprises a placing box, a gas distribution tank and a supporting seat, the inner wall of the placing box is fixedly connected with the gas distribution tank, the supporting seat is provided with a rotating assembly and a pushing assembly, and the outer wall of the gas distribution tank is fixedly connected with a gas outlet pipeline. The multifunctional gas distribution test device can flexibly control gases of different gas sources to flow into the gas distribution tank through the first valve switch and the six sets of switches, diversified gas distribution requirements are met, precise gas distribution is achieved, meanwhile, the top of the gas distribution tank is connected with the detection pipeline and the gas analyzer, and a valve can be opened to convey a sample to the analyzer before detection, so that the detection efficiency is improved. The gas distribution concentration can be monitored in real time, the gas distribution quality can be guaranteed, the gas outlet pipeline 7 can be directly connected with pipelines of other equipment, the gas outlet pipeline 7 can be directly connected with the other equipment, and the flexibility of the device is improved.

The present invention discloses a critical pressure testing system and method for detecting the entry of explosive combustion flames into gaps. The system comprises a main reaction device, a pressure testing unit, an ignition unit, and a photographic unit. The main reaction device comprises a reaction cell, a viewing window, and a gland. The pressure testing unit comprises a pressure sensor, a charge amplifier, and an oscilloscope. The ignition unit comprises an igniter, an optical fiber, and a laser. The photographic unit comprises a high-speed camera and a data collector. The testing unit also comprises a synchronous signal trigger for controlling the pressure testing unit and the photographic unit. The pressure testing unit and the ignition unit are both connected to the main reaction device, the photographic unit is connected to the synchronous signal trigger, and the pressure testing unit and the ignition unit are each connected to the synchronous signal trigger. The system and method provide a new option for distinguishing the safety of explosives with different formulas and can more accurately determine the relative accident risks of explosives with different formulas or storage periods.

The invention discloses a near-seabed explosive explosion simulation test device and test method. The device comprises an explosion water tank system, a seabed simulation device, an optical measurement system, an electric measurement system, a fixed test frame component and an illumination system. The explosion water tank system comprises an explosion water tank arranged on the ground; the seabed simulation device comprises a medium box body which is filled with a seabed medium; the optical measurement system comprises a high-speed camera and a computer; the electric measurement system comprises a sensor and a data acquisition instrument arranged outside the explosion water tank; the fixed test frame component comprises a cross beam fixedly arranged at the upper part in the explosion water tank, an explosive column is connected below the middle part of the cross beam through a fixed grain rod, and a sensor is connected below the cross beam at each of the two sides of the fixed grain rod through a fixed sensor rod; the explosive column and the sensor are positioned right above the medium box body; the sensor is connected with a data acquisition instrument. The method is low in cost, easy to operate, efficient, safe, accurate and reliable in result and suitable for near-seabed explosive explosion simulation tests, and the similarity between the obtained parameters and the actual parameters is high.

The application discloses a kind of multi-stage linkage explosion venting test methods combined with powdery combustion inhibitor, it is related to explosion-proof engineering and safety detection technical field;The method is by constructing with explosion venting device, ignition system, powdery inhibitor delivery system and pressure and optical sensor test cabin, uses PLC to realize ignition, pre-delivery, pressure relief trigger, synchronous inhibition and afterflame inhibition and so on multi-stage linkage control;And through pressure, temperature and flame sensor real-time acquisition of multi-dimensional data of explosion process;By before ignition, ignition instant and in the process of pressure relief with different doses of powdery inhibitor, the explosion suppression performance under different linkage strategies can be systematically evaluated;The application can simultaneously obtain peak pressure, pressure rise rate, flame propagation speed and re-burning conditions and other multi-parameters, realize the quantitative evaluation of the explosion suppression efficiency of powdery combustion inhibitor under multi-stage linkage explosion venting conditions, with the advantages of good data integrity, strong repeatability and suitable for standardization explosion-proof test method construction.

The invention provides a temperature control explosion process product accurate trapping device, and belongs to the technical field of mines, the temperature control explosion process product accurate trapping device comprises a process product trap, an accurate temperature control unit module, a connecting assembly and a telescopic support; according to the precise trapping device for the products in the temperature control explosion process, the products in the explosion process can be quickly responded and trapped under the dual action of the reverse ferromagnetism of the spring and the electromagnet, meanwhile, precise control over trapping of the products in the explosion process is achieved through precise regulation and control over the thermal fuse, and the safety of the products in the explosion process is improved. According to the device provided by the invention, accurate control on different temperature change sections is realized by controlling the diameter of the thermal fuse, and the thermal fuse is fixed in the shock wave right opposite end surface groove through the thread, so that the damage of shock waves to the thermal fuse can be counteracted, and the thermal fuse can be in full contact with a heat source; therefore, high-precision, multi-period and multi-section process product accurate trapping is realized.

The invention discloses a drilling blasting explosive energy transfer mode design and a data simulation method thereof, and relates to the technical field of blasting engineering.The drilling blasting explosive energy transfer mode design method comprises the steps that a rock sample is manufactured, mechanical parameters of the rock sample are tested, and the type of the rock is determined; respectively carrying out bursting tests on the multiple groups of rock samples; measuring, contrastively analyzing the average crushing particle size, the boulder rate and the total seismic wave energy of the central areas of the multiple groups of rock samples; establishing an explosive blasting energy transfer evaluation system, and determining an explosive column installation scheme; the data simulation method comprises the following steps: determining a blasting energy attenuation coefficient, an eccentric influence factor and an explosive energy transfer coefficient of a rock sample; establishing a blasting explosive energy transfer model and an explosive explosion energy density calculation formula; verifying and correcting an explosive explosion energy density calculation formula; the blasting effect can be predicted, the on-site trial blasting frequency is reduced, and the cost is reduced.

The invention belongs to the technical field of coal mine gas quantity experimental equipment, and particularly relates to an experimental device for measuring gas detonation, which comprises a bracket and an experimental box, and the experimental box is connected with an electronic igniter, visible glass and a flow guide pipe; flow guide holes are formed in the flow guide pipes; the bracket is connected with an electric push rod; the electric push rod is connected with a connecting plate; the connecting plate is connected with a gas assembly, an oxygen assembly and a pulverized coal assembly, and the output ends of the gas assembly and the oxygen assembly are arranged in the flow guide holes to inject gas and oxygen into the experiment box respectively; the output end of the pulverized coal assembly is arranged in the experiment box and injects pulverized coal into the experiment box. The liquid nitrogen has an extremely strong cooling effect and can effectively reduce the deep temperature of comburent and greatly reduce the probability of re-combustion, and the liquid nitrogen sprayed after pressurization has strong airflow and can restrain raising of pulverized coal, so that the risk of secondary dust raising explosion possibly caused during fire extinguishing is avoided, and the safety of fire extinguishing is improved. And the personal safety of workers entering an experiment site after the explosion experiment is completed is more effectively guaranteed.

The invention discloses a hydrogen leakage diffusion non-uniform concentration gradient gas cloud minimum ignition energy test and blast-to-pedigree experiment device and an experiment method thereof. Comprising a visual semi-open test chamber, a premixing and flow regulation and control system, a gas temperature regulation and control system, a flow field wind speed regulation and control system, an environment water mist regulation and control system, an adjustable high-pressure ignition system, a non-uniform hydrogen injection system, a data acquisition system, a program control system and a time sequence synchronous controller. According to the hydrogen leakage diffusion non-uniform concentration gradient gas cloud minimum ignition energy test and blast-to-pedigree experiment device, a plurality of gas cloud forms such as local enrichment or concentration gradient advancing along with time can be constructed through cooperation of the position-adjustable non-uniform hydrogen injection system and the premixing and flow regulation and control system, and the injection position and key parameters can be reproduced; and moreover, dynamic monitoring of concentration distribution can be realized through a data acquisition system, and a researcher is helped to establish a corresponding relation of the gas cloud concentration along with time and space changes.

The application provides a hydrogen-doped natural gas explosion characteristic experiment device in a confined space, which comprises a pipeline system and a gas distribution system, the pipeline system comprises a driving pipe, a visible pipe and a test pipe arranged in sequence, the gas distribution system comprises a vacuum pump, an electric control valve group and a gas cylinder pipeline connected with each electric control valve in the electric control valve group, and the gas distribution system is connected with the driving pipe through a gas inlet. The hydrogen-doped natural gas explosion accident characteristic evolution and inhibition experiment of different hydrogen proportions can be carried out, and important characteristic parameters in the deflagration and detonation flame propagation process of the hydrogen-doped natural gas can be recorded.

The invention provides a horizontal rotary heating device for detecting the thermal burst pulverization rate of limestone. The horizontal rotary heating device comprises a fixed kiln cylinder device, an in-kiln rotary device, an outer kiln cylinder fixed circular sleeve and a device base, the device base comprises a bottom plate I and a side plate I, and a guide rail is arranged on the bottom plate I; the kiln cylinder fixing device is fixedly mounted on the side plate I, and the other end of the kiln cylinder fixing device is open; a movable tray and a movable trolley are mounted on the guide rail; the movable trolley is provided with a bottom plate II and a side plate II, the side plate II is provided with a sealing large bearing, and the other side plate II is provided with an external kiln fixed bearing; the in-kiln rotating device comprises a rotating cylinder, one end of the rotating cylinder is sealed through a circular plate, and a connecting shaft is installed on the circular plate. The circular plate is rotatably installed on the sealing large bearing, and the connecting shaft is rotatably installed on the external kiln fixing bearing. According to the invention, the bursting pulverization characteristics of the limestone with different characteristics can be tested in advance, so that the thermal bursting pulverization performance of the limestone can be accurately evaluated.

The utility model relates to the technical field of explosive explosion heat testing, and particularly discloses an explosion heat bomb gas replacement system which comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a pressure sensor, a nitrogen cylinder, an exhaust valve, a vacuum pump and a controller. The air outlet end of the second solenoid valve is connected with the vacuum pump through a pipeline. According to the utility model, the ultraviolet light catalytic reactor and the titanium dioxide photocatalyst are utilized to decompose combustible gas or harmful impurities; a filter is used for filtering gas exhausted from the explosion heat bomb, solid particles on the gas are intercepted, after gas replacement is finished, a sixth electromagnetic valve and a fifth electromagnetic valve are opened, a gas adding pump and a gas extracting pump are started at the same time, gas generated by the gas adding pump blows up the solid particles attached to the top and the bottom of a filter plate, and the solid particles on the gas are removed. And blown solid particles are sucked away by using the sucking pump, so that the cleanliness of the interior of the filter is improved.

The invention relates to a multi-element gas uniform mixing system for an explosion test of coal mine explosion-proof equipment. The multi-element gas uniform mixing system comprises a plurality of gas cylinders, a gas inlet electromagnetic valve, a gas filtering and drying device, a gas mixing device, a gas return electromagnetic valve, a gas analysis module, a gas outlet electromagnetic valve and a PLC (Programmable Logic Controller), the gas cylinders are filled with different explosion test gases, the gas output end of each gas cylinder is connected with the gas inlet end of the gas inlet electromagnetic valve through a gas pipeline, and the gas outlet end of the gas inlet electromagnetic valve, the gas filtering and drying device, the gas mixing device and the gas outlet electromagnetic valve are sequentially connected through a gas pipeline. The invention further provides a mixing method of the multi-element gas uniform mixing system for the explosion test of the coal mine explosion-proof equipment. According to the invention, the gas mixing efficiency and uniformity of the explosion-proof test are improved, the technical problems of non-uniform gas distribution concentration, poor system reliability and the like in the explosion-proof test are solved, and the inspection capability of the explosion-proof test is improved.

The invention discloses a boron-aluminum mixed powder ignition characteristic testing system and method based on a shock tube, and the system comprises the shock tube, a gas distribution unit, a powder dust raising unit, and a signal collection unit. The gas distribution unit comprises a vacuum pump and a driving gas cylinder, and the vacuum pump is connected with the shock tube through an exhaust tube and used for vacuumizing the shock tube; the driving gas cylinder is connected with the shock tube through a gas filling pipeline and is used for filling high-pressure driving gas into the driving section and filling low-pressure test gas into the test section; the powder dust raising unit comprises a high-pressure air tank, and the high-pressure air tank is connected with the spray head through a high-pressure pipeline and used for spraying boron-aluminum mixed powder stored in the spray head into the experiment section to form a boron-aluminum mixture cloud cluster; and the signal acquisition unit is used for acquiring reflected shock wave signals and image data in the experimental section. The non-contact high-response synchronous measurement of the pressure sensor and the photoelectric sensor is realized, the real time interval from shock wave compression to chemical reaction luminescence can be directly obtained, and the test data is accurate and reliable.

The utility model relates to the technical field of building detection, in particular to a ground misfire performance detection device. The device comprises a box body, a convex edge, a bottom plate, a clamping mechanism and an inner supporting cylinder, a grinding wheel is movably arranged in the box body, and a limiting hole is formed in the side wall of the box body; the two protruding edges are connected to the two opposite side walls in the opening respectively, the width of the protruding edges is larger than that of the opening, and sliding grooves with the length larger than that of the opening are formed in the protruding edges. The bottom plate is provided with a sliding shaft and a limiting block, the bottom plate is in rotatable sliding fit with the sliding groove through the sliding shaft, and when the bottom plate slides, the opening can be blocked, and the limiting block is matched with the limiting hole to limit rotation of the bottom plate; the clamping mechanism is connected with the bottom plate and located in the clamping groove. The inner supporting cylinder is in sliding connection with the box body, the inner supporting cylinder can be controlled to slide so that the end of the inner supporting cylinder can penetrate through the opening to be located outside the box body, and the grinding wheel is located in the inner supporting cylinder. The structure does not need to be split, and use is more convenient.

The invention discloses a goaf residual coal spontaneous combustion and gas symbiosis disaster simulation experiment system and method, and belongs to the field of coal mine residual coal spontaneous combustion and gas symbiosis disaster. According to the invention, evolution laws of mass, temperature, pressure, gas components and content in the spontaneous combustion and gas explosion process of the residual coal are explored. The residual coal combustion chamber in the simulation experiment system provided by the invention can be independently used, and is provided with a plurality of interfaces for being connected with monitoring equipment, so that the residual coal combustion process can be independently researched, and the evolution of residual coal spontaneous combustion and gas symbiosis disasters in a goaf can be comprehensively researched; and a necessary basis is provided for prevention and control of residual coal spontaneous combustion and gas symbiosis disasters in the mine goaf while the experiment cost is reduced.

The invention belongs to the technical field of explosion mechanics and experimental stress analysis, and particularly discloses a high-pressure gas explosion test system in a porous digital caustic experimental system. The system comprises a high-pressure gas explosion generation subsystem, a porous caustic optical measurement subsystem, a data acquisition and processing subsystem and an integrated control and synchronous triggering subsystem. Real-time segmentation and feature extraction are carried out on the image through the FPGA module to compress data, accurate synchronization of time sequences of explosion, illumination and acquisition is ensured through synchronous triggering, and efficient, reliable and automatic observation and analysis of an explosion transient physical field are achieved. The system is not only suitable for standard blast wave research, but also can be flexibly adapted to simulation of a complex turbulent flow field, research of wave system interaction and other frontier scientific problems, and the application boundary and scientific research value of the porous digital caustics technology are expanded.

The present application relates to a kind of oil-immersed current transformer explosion equivalent method based on explosion load, belong to high-voltage equipment fault simulation and safety test technical field, comprising: based on fault data, extraction explosion load characteristic parameter;Based on load characteristics, the equivalent TNT explosive mass required by explosion load is calculated;Based on the equivalent TNT explosive mass, explosion load characteristics and the structural characteristic parameters of mutual inductor shell, the explosion distance of equivalent load is calculated;The equivalent detonation velocity of explosive detonation is calculated, according to the numerical range, the entity explosive type that the chemical component and detonation velocity are adapted is matched;The explosive of selected type and mass is fixed in the inside of oil-immersed current transformer with the preset spatial arrangement configuration.The present application obtains the key load characteristic parameters of internal explosion fault of oil-immersed current transformer, so as to determine the explosive equivalent required by recurring load and the explosive type matched, provides reliable test method for the explosion-proof performance verification of mutual inductor.

This invention discloses a self-mixing gas explosion limit testing device, belonging to the technical field of gas explosion limit testing devices. The self-mixing gas explosion limit testing device includes a base, a mounting frame mounted on the base, an explosion chamber mounted on the mounting frame, an exhaust component mounted on the explosion chamber, an igniter mounted on the explosion chamber, an inlet component and a stirring component inside the explosion chamber, and an exhaust component below the base. The exhaust component includes a transmission component and an energy storage component. Simultaneously with the input of gas, the stirring component mixes the gas, improving mixing uniformity and speed. This stirring method achieves rapid gas homogenization without compromising sealing, improving mixing effect while preventing gas leakage and ensuring testing effectiveness. By combining the exhaust component and the energy storage component, the high-pressure gas generated during the explosion test is utilized to clean the explosion chamber, further improving testing effectiveness and resource utilization.

The invention relates to the technical field of helicopter maintenance and detection, in particular to a multifunctional maintenance and detection device and method for a helicopter, and the device comprises a housing, the housing is internally provided with a test circuit, and the test circuit at least loads a function inspection loop and an explosion cap simulation loop; through a load function inspection loop and a configured memory indication function, maintenance detection can be effectively carried out on a power supply line of a helicopter airborne system, and the problem that communication between maintenance engineers is difficult during regional inspection is solved. Meanwhile, the explosion cap simulation loop can effectively avoid the risk that a fire extinguishing bottle explosion cap, a buoy gas cylinder explosion cap and a cabin door explosion connecting rod explosion cap are mistakenly detonated in the testing process, the maintenance and detection efficiency of the helicopter is improved, and the corresponding risk is reduced.