238results 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 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 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 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 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 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 relates to the technical field of safety performance evaluation of energetic materials, in particular to an intelligent explosive safety boundary monitoring system based on multi-parameter response analysis. Comprising a granulation mechanism and further comprises a sensor system, and the sensor system comprises a thermocouple sensor, a force sensor and an electrostatic sensor; the thermocouple sensor, the force sensor and the electrostatic sensor are connected with a signal acquisition instrument and then are connected into a computer, and real-time monitoring on the temperature, pressure and electrostatic accumulation situation in the granulation process is realized through the computer. According to the method, the statistical distribution characteristics of the response probability under multiple repeated tests are considered in the determination of the safety boundary, and the obtained safety boundary error is smaller. The intelligent monitoring system for the granulation process can accurately monitor the temperature, pressure and electrostatic quantity change of the explosive in real time, and the potential safety hazards such as thermal runaway, mechanical overload and electrostatic discharge risks in the production process are effectively avoided.

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.