298results about "Material exposibility" patented technology

The invention discloses an experimental device and an experimental method for combustible gas explosion discharge of a communicating container, and belongs to the field of combustible gas explosion protection. The experimental device comprises a communicated discharge container, a gas distribution system, a high-voltage ignition system, a data acquisition system, a high-speed schlieren system and a synchronous control system. The experimental device and the experimental method can be used for experimental research on combustible gas explosion release of the communicating container; the influence rules of factors such as static action pressure (Pstat), discharge caliber (Dv), discharge coefficient (Kv), spherical explosion container volume ratio (V1 / V2), communication pipeline length (L), communication pipeline diameter (D), fuel gas equivalence ratio (phi), ignition position (IIn) and ignition energy (E) on flammable gas explosion discharge overpressure and discharge flame are analyzed; and the formation factors of internal and external discharge overpressure peak values (a peak value Pb formed by rupture of a discharge diaphragm, a peak value Pex formed by external secondary explosion, a peak value Ph formed by Helmholtz oscillation, a peak value Pac formed by sound wave coupling and a peak value Pred formed by a maximum flame area), a discharge gas cloud structure, a discharge flame form and an external pressure wave evolution rule are explored.

The invention belongs to the field of gas explosion test technology development, and relates to a reinforced full-size residential building structure gas leakage explosion multi-parameter test platform and method, which can be used for simulating the whole process of a gas leakage explosion accident in a real residential building scene. The gas leakage explosion evolution mechanism and disaster-causing consequence research under multiple ignition sources, multiple gas types, multiple pressure relief conditions and multiple obstacle environments can be realized. The test platform can simulate a resident house type, and through local reinforcement design and coupling test technology development of the test platform, a high detonation pressure, high simulation and multi-parameter gas explosion repeated test is realized.

The invention provides a gas-solid two-phase intelligent explosion suppression system for driving powder through high-pressure inert gas and a testing method thereof. The gas-solid two-phase intelligent explosion suppression system is used for simulating gas-dust composite explosion and evaluating the efficiency of an explosion suppressant. The system comprises a model roadway, a gas distribution subsystem, an ignition subsystem, a data acquisition subsystem, an explosion suppression device, a high-speed photography subsystem and a computer. The model roadway is horseshoe-arch-shaped and is sealed by transparent boronized silicon glass, so that the explosion process is convenient to observe. The explosion suppression device is composed of an inert gas storage cabinet and an inhibitor ejector, inert powder is driven to be ejected through high-pressure inert gas, and therefore explosion is effectively suppressed. The data acquisition subsystem acquires explosion parameters through a temperature sensor, a pressure sensor, a flame sensor and a concentration sensor, the high-speed photography subsystem records a flame flow field in real time, and whole-process monitoring and data analysis are achieved in combination with a computer. The system can evaluate the explosion suppression efficiency of the gas-solid two-phase explosion suppressant in a complex explosion environment, and has a wide application prospect.

The invention provides a deep tunnel surrounding rock internal blasting vibration prediction method and system, and relates to the technical field of tunnel engineering blasting, and the method comprises the steps: horizontally drilling a plurality of test holes from a preceding tunnel to the interior of surrounding rock, and sequentially installing a blasting vibration sensor at the hole bottom of each test hole through a push-pull device; the following tunnel is blasted, and vibration data, collected by the vibration sensor, of the test hole are obtained; a first blasting vibration velocity prediction model in front of the tunnel face is obtained through fitting of the vibration data of the test hole in front of the tunnel face and the blasting center distance; calculating the actual explosion center distance of the test hole behind the tunnel face; and fitting the Sadgowski formula by using the actual blasting center distance and the vibration data of the test hole behind the tunnel face to obtain a second blasting vibration velocity prediction model behind the tunnel face. According to the invention, the push-pull device is adopted to solve the problem of monitoring the vibration in the surrounding rock of the deep tunnel and the problem of a propagation path of blasting stress waves in a complex environment; and the precision of the blast vibration prediction formula behind the tunnel face is improved.

The invention provides a high and cold area strip mine rock explosibility grading method, and relates to the technical field of mine rock explosibility grading. According to the method, field experiments, numerical simulation and an intelligent algorithm are combined, and the influence of climate and geological conditions of a high and cold area on rock mass explosibility is considered; the method comprises the following steps: establishing an explosibility index system comprising cold region climate and geological conditions, rock physical and mechanical properties, explosive blasting parameters and a blasting process, determining a fuzzy membership degree, a relative weight and a comprehensive weight of each evaluation index by using a fuzzy evaluation method and adopting a trapezoidal membership function, and proposing an explosibility grading method considering the cold region influence.

The invention relates to the technical field of dust combustion, and provides a dust explosion combustion experiment device in order to solve the problems that an existing dust explosion combustion experiment device is insufficient in parameter control precision, and an experiment multi-focus single variable lacks a dust removing mechanism and a safety protection measure, and the dust explosion combustion experiment device comprises an experiment table which is provided with a power chamber and an equipment chamber; one side of the experiment table is hinged with an access door, two sides of the top of the experiment table are provided with conveying main pipes extending to the equipment chamber, a power supply assembly is arranged in the electric power chamber; the protective shell assembly comprises an outer shell and an inner shell; a plurality of exhaust pipes are arranged at the top of the inner shell; the dust generation assembly comprises a plurality of dust storage tanks and an air compressor; the ignition control assembly comprises a pulse igniter, a flame detection feedback circuit and an ignition head; the environment adjusting assembly comprises a box body, an oxygen tank and a humidifier, wherein the oxygen tank and the humidifier are arranged in the box body. The device has the advantages that the dust concentration is accurately regulated and controlled, the environmental parameters are dynamically coupled and controlled, dust residues are rapidly removed, and the experiment safety is high.

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 relates to a combustible gas cloud explosion parameter testing device and method in an open space, and belongs to the technical field of combustible gas explosion safety protection. The test device comprises an explosion environment simulation system and a performance test system, and further comprises a combustible gas bottle, an air bottle, an inert gas bottle, a solid powder explosion suppression tank, a liquid explosion suppression tank, an ignition device and an explosion-proof fan, the explosion environment simulation system comprises a supporting platform and a shell located above the supporting platform, a closed space is formed between the shell and the supporting platform, and the closed space is used for performing explosion simulation on the combustible gas cloud; the ignition device is connected into the closed space through a circuit and is used for igniting combustible gas; the anti-explosion fan is used for blowing air to the outer surface of the shell; the performance test system comprises a temperature test system, a pressure test system, a concentration test system, a sound test system, a flame velocity system, a fluid microstructure system, a structural strain system, an image acquisition system and an obstacle.

The invention discloses a high-precision combustible gas detection system, and relates to the technical field of safety monitoring and environmental protection, and the main scheme is as follows: collecting multiple data of combustible gas; respectively calculating a diffusion rate, a combustion heat index and heat conductivity, and further calculating a gas concentration value; comparing a preset threshold value and judging whether the combustible gas concentration is in a normal range or not; if the combustible gas concentration is in a normal range, respectively calculating an explosion lower limit value and an explosion upper limit value to obtain a combustion speed; the flame propagation speed is calculated, and the combustion heat release rate is further obtained; calculating radiant heat flux based on the combustion heat release rate, comparing with a preset threshold value, and judging whether the radiant heat flux is in a safe state or not; according to the method, all-around monitoring and early warning can be carried out on various dangerous conditions related to the combustible gas, and the safety guarantee of the combustible gas use and existence environment is greatly improved.

The invention discloses an experimental device and an experimental method for gas / dust explosion flame-shock wave superposition coupling effect and combustible medium explosion transition induced by gas / dust explosion flame-shock wave superposition coupling effect under multi-parameter influence. Comprising a visual explosion system, a gas leakage diffusion system, a powder leakage diffusion system, an ignition system, a gas supply system, a powder spraying system, a discharge system, a displacement regulation and control system, a data acquisition system, a synchronous controller and a program control and data acquisition system. According to the experimental device and the experimental method for the gas / dust burning flame-shock wave superposition coupling effect under the influence of the multiple parameters and the induced combustible medium burning explosion transition thereof, the action processes of mutual impact, superposition, coupling and the like of detonation / detonation head-on flame-shock wave under the multiple working condition parameters can be realized; and the experimental study on the process of inducing the leakage diffusion combustible medium explosion transition and the critical condition thereof fills the technical blank of the study on the explosion flame-shock wave coupling effect process and the secondary disaster evolution mechanism induced under the influence of multiple parameters.

The invention belongs to the technical field of explosion suppression experiments, and particularly relates to an explosion suppression testing device which comprises an ignition electrode arranged in an explosion area and electrically connected with an ignition controller, the ignition controller is electrically connected with a control computer, and the ignition electrode is controlled by the control computer and the ignition controller to ignite an explosion source; the explosion suppression device is arranged at the top of the explosion area and is used for suppressing explosion after the explosion source is detonated; the explosion suppression device is filled with a water-based explosion suppression material, a powder explosion suppression material or a gas explosion suppression material; the explosion source is one of a solid explosive, a liquid explosive or a dust explosive. The control computer can control the ignition controller to control the ignition electrode to ignite the explosion source, after explosion occurs, the explosion suppression device is started to spray the explosion suppression material to extinguish the explosion source, and data analysis equipment such as a high-speed camera is erected on one side of the device, so that the test process is completely recorded, and performance analysis of the explosion suppression material on the explosion source is realized.

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 relates to a test method for inhibiting thermal runaway diffusion of a battery cell module by a battery explosion-proof box. The test method comprises the following steps: S1, preparing the battery explosion-proof box; s2, preparing a to-be-tested battery cell module; s3, respectively installing a temperature sensor and a voltage sensor on two sides of the heating sheet, and installing a temperature sensor on each surface outside the explosion-proof box; s4, carrying out a thermal runaway test on the to-be-tested cell module, and obtaining a time-dependent temperature change curve and a time-dependent voltage change curve of the cell module provided with the heating sheet, and a time-dependent temperature change curve of each monitoring point on the outer side of the box body; and S5, observing whether flames and bursts are separated out in the test process and whether the pressure of the box body can be normally relieved, standing for more than 48 hours after the test is finished, opening the box under the condition of ensuring safety, and checking whether the structure of the box body is intact. The method is simple and easy to implement, the understanding and research of the whole process of triggering the thermal runaway diffusion of the battery cell module are enhanced, and the test of the protective performance of the battery packaging box and the targeted improvement of a packaging scheme are facilitated.

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 belongs to the technical field of coal mine safety research, and discloses a fuel-rich gas coal dust explosion residual gas secondary explosion test device which comprises a primary explosion container and a secondary explosion container, the primary explosion container is communicated with the secondary explosion container through a three-phase valve, and the three-phase valve is communicated with a gas sample bag; the pulverized coal spreading system comprises a first spreading machine and a second spreading machine which are fixedly arranged at the bottoms of the primary explosion container and the secondary explosion container in a penetrating manner respectively; the gas supply system comprises a premixing tank which is communicated with the primary explosion container and the secondary explosion container; and the image acquisition system comprises a first camera and a first infrared thermal imager which are arranged corresponding to the first explosion container, and a second camera and a second infrared thermal imager which are arranged corresponding to the secondary explosion container. According to the invention, the research on the flame propagation dynamic characteristic evolution mechanism under the influence of multiple parameters of fuel-rich gas coal dust explosion and residual gas explosion is realized, the experimental error is reduced, and the research cost is reduced.

The invention discloses a modularized and visual pipeline metal dust explosion test system and method. The system is characterized in that a plurality of double-flange short pipes are connected with a plurality of transparent pipelines to form a test pipeline; the flange blind plate is provided with an ignition electrode and is packaged at one end of the test pipeline; each dust filling and collecting assembly comprises a pressure sensor, a dust disperser, a pneumatic valve, a dust bin and an electromagnetic valve, and the pressure sensor and the dust disperser are mounted on the double-flange short pipe; a dust outlet of the pneumatic valve is connected with a feeding end of the dust disperser; a dust outlet of the dust bin is connected with a dust inlet of the pneumatic valve; an air outlet of the electromagnetic valve is connected with an air inlet of the pneumatic valve; and an air outlet of the synthetic air bottle is connected with an air inlet of the electromagnetic valve through a plurality of air supply pipelines. The method comprises the following steps: assembling the system; filling dust, and collecting an image; dust is detonated, and pressure and image data are collected; and analyzing test data. According to the system and the method, the dispersion and flowing characteristics of dust cloud particles and the flame propagation condition in the whole explosion process can be obtained.

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 blasting depressurization experimental equipment and method for an oil and gas conveying composite pipe. The blasting depressurization experimental equipment comprises composite pipe adapters, experimental medium injection systems, dual-mode blasting devices, discharge pipes and controllers, wherein the two ends of the composite pipe are each provided with a composite pipe adapter; the damage condition of the composite pipe under rapid pressure reduction in the pipe can be analyzed, the bursting pressure load of the pipe is converted into the bursting load of the bursting disc, rapid and instant leakage of a medium in the pipe can be simulated on the premise that the composite pipe is not damaged, the device is closer to engineering practice, and the device is simple in structural process and convenient to operate. And the collapse critical pressure of the lining layer of the composite pipe under different discharge apertures can be directly obtained.

The invention discloses a device and method for simultaneously determining the detonation velocity and detonation pressure of micro-scale charge, and belongs to the technical field of detonation performance testing of energetic materials. The device comprises a laser, a charging system, a detonation velocity testing system and a detonation pressure testing system, the charging system comprises a charging clamp, a sample containing groove and a sample ring, the sample containing groove is fixed in the charging clamp, and the sample ring is assembled in the sample containing groove; the detonation velocity testing system comprises a probe, a direct-current power supply and an oscilloscope; the detonation pressure testing system comprises an optical fiber and a photon Doppler velocity tester. During use, a to-be-tested sample is pressed into the sample rings, the probe is embedded between the two sample rings, the to-be-tested sample is detonated by using energy provided by the laser, the detonation velocity and detonation pressure of the to-be-tested sample can be measured at the same time, the sample amount required by a single shot experiment is within 200 mg, and compared with a traditional test method, the sample consumption is greatly reduced, and meanwhile, the test safety is improved.

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 invention provides a cold hydrogen explosion parameter testing system and method. The testing system comprises a vacuum heat insulation container, an explosion container, a first gas supply device and a second gas supply device. The vacuum heat-insulating container is used for providing a heat-insulating environment; the explosion container is arranged in the heat insulation environment and is used for carrying out a cold hydrogen explosion parameter test to be tested; the first gas supply device is connected with the explosion container and is used for supplying low-temperature hydrogen-oxygen mixed gas into the explosion container, so that the concentration of hydrogen in the explosion container reaches a preset value; the second gas supply device is connected with the explosion container and is used for supplying supercooled hydrogen into the explosion container, and the supercooled hydrogen is diffused in the low-temperature hydrogen-oxygen mixed gas to form the cold hydrogen to be detected. According to the invention, the gas is introduced by a two-step method to form the cold hydrogen to be tested, so that the uniformity of the cold hydrogen to be tested is effectively improved, the unsteady state simulation of ultralow-temperature hydrogen and even liquid hydrogen at the initial leakage stage in a low-temperature environment can be realized, and the test data has more realistic guidance.

The invention belongs to the technical field of dust explosion testing, and particularly relates to a dust explosion discharge testing device and method, the dust explosion discharge testing device comprises an explosion pipeline and a base, the top end of the explosion pipeline is provided with an end cover, the base is provided with a powder storage tank, the powder storage tank is internally provided with a mushroom-shaped nozzle, the mushroom-shaped nozzle is provided with a plurality of air holes, and the air holes are communicated with the explosion pipeline. A pressure sensor and an ignition electrode are installed on the side edge of the explosion pipeline. When the dust explosion release test is carried out, firstly, to-be-tested powder is placed in the powder storage tank, then the base is sequentially covered with the sealing rubber mat, the explosion pipeline, the explosion release film and the end cover, then compressed air in the air storage tank is controlled to be conveyed into the explosion pipeline through the mushroom-shaped nozzle, and the compressed air is sprayed into the powder storage tank through the air hole; and at the moment, sparks of the started ignition electrode can explode instantly when encountering dust cloud, and the explosion venting film on the top is broken to release pressure and flames.

The invention provides an impact sensitivity testing device and method under a thermal-mechanical coupling effect, and relates to the technical field of testing equipment. The test device comprises a temperature control system, an extremely low temperature adjusting module, an impact device, a drop hammer replacement window and a host. The temperature control system is used for setting an experimental temperature to complete tests under different temperature conditions from room temperature to 200 DEG C; the extremely low temperature adjusting module is used for rapidly cooling and controlling the temperature from the room temperature to-40 DEG C; the impact device is used for releasing a drop hammer impact sample for experiment; the drop hammer replacement window is used for safely and conveniently replacing the drop hammer; the host is used for starting impact. The device has the advantages of being accurate in data, high in safety protection level and wide in test temperature range, and impact sensitivity data under the coupling effect of heat and mechanical impact can be obtained. The method can be widely applied to research, production, process optimization, storage, safe use and the like of energetic materials.

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 present application discloses a gate system and a sample inspection method for sample detection. Relating to the field of detection and analysis, the gate system includes: a containing device for containing an inserted ticket to be tested; a wiping sampling device, including a wiping sampling belt, the wiping sampling belt drives the ticket to be tested to move in the containing device, and wipes and samples the ticket to be tested; an aspiration sampling device for collecting samples dropped from the wiping sampling device; and a detection device for detecting the sample and outputting the detection result. The gate system and sample inspection method for sample detection disclosed in the present application have a wide range of applications and can quickly sample and detect non-volatile substances.

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.