588results about "Material exposibility" patented technology

The invention discloses a device for testing explosion, spreading and explosion suppression characteristics of inflammable gas and dust, which comprises an explosion test pipeline, a gas distribution system and a powder spraying system communicated with the explosion test pipeline respectively, an ignition system for igniting the inflammable gas or dust introduced into the explosion test pipeline, a data test acquisition system, and a host computer connected with the data test acquisition system, wherein the data test acquisition system comprises a sensor group distributed on the explosion test pipeline, a signal conditioner and a dynamic data acquisition analysis system. The device has the advantages of reasonable design, simple and convenient operation and use, more test functions and good test effects, and can effectively solve various practical problems of the prior experimental devices.

The invention discloses a testing system for critical pressure during thermal explosion of explosives. The testing system comprises a pressure-resistance heating unit, a pressure control unit, a sample loader unit, a decomposed product detection unit and a computer; the pressure-resistance heating unit comprises a single-cavity heating furnace body, wherein a temperature sensor which is connected with the computer is arranged in a furnace cavity, and temperature, temperature rise speed and pressure of the single-cavity heating furnace body are controlled by the computer; the pressure control unit comprises a high-pressure gas cylinder, a pressurizing gas channel pipe, a pressurizing electromagnetic valve, a heat conduction layer extension edge pressurizing pipe, a pressure-releasing gas channel pipe, a pressure-releasing electromagnetic valve, a safety valve gas channel pipe, a safety valve and a pressure sensor; the sample loader unit comprises an L-shaped bracket, a stepping motor, two fixed pulleys, a steel wire rope, a furnace cover, a sample reservoir bracket and a sample reservoir; the decomposed product detection unit comprises an infrared sensor which is arranged in the sample reservoir; and the computer is provided with a data acquisition card, a graphic display control and a data processing unit and can be used for identifying the critical state of thermal decomposition to combustion or explosion and acquiring a critical pressure parameter.

The invention provides a novel high-temperature high-pressure explosion limit tester comprising a raw material gas supply apparatus, an explosion determination device, a vacuum generating device, and a controlling device. The explosion determination device is mainly composed of a pressure sensor, a temperature sensor, and an igniter. The explosion determination device is used for determining explosion limit, explosion pressure and explosion temperature of the gas or vapor. The vacuum generating device is used in vacuum pumping upon the explosion determination device. The controlling device is used for determining, controlling and collecting experimental data generated during the experiment. Compared with prior arts, the high-temperature high-pressure explosion limit tester provided by the invention has a temperature testing range of room temperature to 400 DEG C, which is higher than 200 DEG C which is a maximal temperature of instruments in existing standards; the tester provided by the invention has a pressure range of normal pressure to 2.2MPa, which is higher than 1.38MPa which is a maximal pressure of instruments in existing standards; and the tester provided by the invention has a test volume of 10L, which is larger than that of an existing tube-type explosion limit tester, such that a wall effect can be better reduced.

The invention relates to the technical field of fire hazard safety, and especially relates to an experiment device and an experiment method for gas cloud combustion, explosion simulation and inerting, inhibition. The device comprises an experiment test system composed of an explosion experiment container tank, a flame and explosion pressure radial propagation detection device, an ignition device, a generated gas sampling analyzer, and a high-speed schlieren and data acquisition, a sample introduction system, a combustion explosion inerting inhibition system, and a control system composed of wireless synchronous control and computer remote monitoring, and is a multifunctional comprehensive experiment platform device. The invention realizes 180-degree rotation of the tank, data synchronous acquisition, gas distribution and sample introduction with precise proportions, synchronous and delayed multimode ignition and inhibition system ejection; wireless and wired data transmission is adopted for control; man-machine separation of the tank and the controlling person is realized; safety and reliability of data transmission are guaranteed; combustion or explosion and inerting and inhibition experiments of various experiment samples such as gas cloud, dust, oil mist, and the like can be carried out when the tank is in a vertical or horizontal state.

The invention provides an apparatus for testing flame propagation and flame suppression in the flammable gas and air premixed gas explosion process. The whole apparatus comprises a combustion pipeline, a water mist generating device, a metal net fire retardance device, a high-speed camera, a schlieren system, a pressure testing system, an automatic gas distribution system, a temperature testing system, an ion probe detection system, a data acquisition instrument, a high-tension ignition system and a synchronous controller. Through the apparatus, flame propagation characteristics and flame propagation rules are researched in the premixed gas explosion process under the influences of factors such as different flammable gas components, different opening states, different ignition positions and different types of flame instability, the effects of stopping agents, fire-retardant metal nets, water mist and the like on controlling and restraining flame propagation are researched, a method and technology for restraining premixed gas flame propagation are developed under the physical-chemical coupling effect, and the inner mechanism of the apparatus is explained.

The invention discloses a gas explosion simulation test system and method and belongs to the technical field of explosion tests. The test method comprises the following steps: checking the connecting integrity of a sensor, and starting a data acquisition unit; starting a high-speed camera and computer software, and adjusting the shooting angle of the high-speed camera; opening an air outlet valve, and vacuumizing a simulated roadway by using a vacuum pump; opening an air inlet valve, a methane gas cylinder, an air bottle, a reducing valve, a solenoid valve and a flowmeter, and regulating to obtain the test premix gas under different gas concentrations; igniting through an igniter, triggering the data acquisition unit to acquire pressure and temperature data, and starting the high-speed camera to shoot the gas explosion process through externally triggering; analyzing and processing the acquired data and image, and finding the gas explosion rule. The method has the advantages that the explosion stress wave propagation rule, temperature change rule and smoke and flame change rule in the gas explosion process can be obtained, and quantified and refined description in the gas explosion process is realized.

The invention provides a testing apparatus for burning and explosion of combustible gas in narrow, long and restricted space under the condition of multiple factors. The testing apparatus comprises an ignition device, a pressure-resistant enclosed container, a combustible gas tank, an air compressor and a PLC control assembly unit. The testing apparatus researches on the explosion characteristics and reaction process mechanisms of a variety of combustible gases under different conditions through barrier setting, gas distribution, ignition, measurement, acquisition and integration of an analysis system and provides technical reference for pipeline arrangement, explosion suppression design and safety evaluation.

The invention relates to a multifunctional testing system for suppressing explosion of flammable gas by water mist and a testing method implementing the same. The multifunctional testing system is structurally characterized by comprising a device main part, a data acquisition part and an accessory part. The device main part comprises a testing pipeline, a seal head and ignition device, a rupture disk clamp and rupture disks. The data acquisition part comprises a pressure sensor, a temperature sensor, a flame sensor, a data acquisition instrument and bundled software. The accessory part mainly comprises connecting pipelines, valves and safety accessories. The testing operation method includes steps of experiment preparation, distribution premixing, explosion suppression testing, and purging and washing, The testing system is convenient to mount, flexible to combine and simple to operate. Preparation of level flammable mixed gas in various concentrations is achieved by a differential pressure distribution method; and various explosion parameters at different situations in explosion suppression process are acquired and recorded by matching with the various sensors. The defects that an existing device is single in function, complex to operate, narrow in suitability and the like are overcome. The multifunctional testing system and the testing method are widely applicable to tests for explosion suppression effects of water-based suppressant and analysis researches.

The invention discloses a fuel explosive performance testing system. The fuel explosive performance testing system comprises a computer, a main control system (1), and a high-pressure air supply device, a feeding device, an explosive cabin (2), an ignition device (4) and a vacuumizing device (5) which are connected with the main control system (1), wherein an information acquisition device (3) is fixedly arranged on the inner wall of the explosive cabin (2); an ignition electrode is detachably installed on the top of the explosive cabin (2), and the upper part of the ignition electrode is connected with the ignition device (4); the explosive cabin (2) is communicated with the feeding device and the vacuumizing device (5); the computer is connected with the information acquisition device (3). By adopting the fuel explosive performance testing system, the gases can be mixed in any ratio; various data indexes can be measured by the information acquisition device in real time so as to systematically represent the explosive performance of fuel.

The invention discloses an oil-gas explosive critical parameter testing device. The oil-gas explosive critical parameter testing device comprises an explosion reaction pipe, an inert gas supply device, a vacuum pump, a gas analyzer and an ignition device. The invention provides the explosive critical parameter testing device with a high-energy ignition source, which is used for simulating an actual volatilization state of oil gas in an oil tank and uses the online gas analyzer to test an explosive critical parameter, aiming at the problems that the conventional explosive testing device is lack of guiding and practical values of detection data and the like. The oil-gas explosive critical parameter testing device uses a sealing pipeline with a cross section which has an area equivalent to an area between primary seal and secondary seal of the conventional oil storage tank with the volume of 100,000 cubic meters as an explosion reaction pipe; the oxygen concentration and an oil gas concentration of mixed gas inside the pipeline can be respectively controlled by introducing nitrogen and oil gas; an electric sparkle firing and igniting test is carried out; and the explosive strength of the mixed gas, and the oxygen concentration value and the oil gas concentration value before explosion can be tested, so that the upper limit and the lower limit of the oil gas explosions under different oxygen concentrations can be found out. Therefore, the safe section of the oil-gas mixed gas can be found out.

The invention discloses an explosion danger testing device for a gas-phase reaction system and a using method thereof. The device comprises a gas-phase feeding system, a reaction kettle, a high-pressure ignition system and a dynamic pressure collection system, wherein the gas-phase feeding system is connected with the reaction kettle, and is used for feeding a raw gas to be tested into the reaction kettle; the high-pressure ignition system is arranged on the reaction kettle, and is used for igniting the reaction kettle; and the dynamic pressure collection system is arranged on the reaction kettle, and is used for dynamically testing pressure in the reaction kettle in real time. The device of the invention can observe and study gas-phase explosion dangers by forcible ignition, and collect real-time data to observe and study gas-phase oxygen content controllability under different conditions so as to test the explosion dangers in gas-phase reaction by gas-phase ignition experiments.

The invention relates to an experiment device and method for simulating gas-coal dust explosion in underworkings of a coal mine, and belongs to the technical field of safety engineering of the coal mine. Requirements on the experiment device and method for the gas-coal dust explosion in the underworkings of the coal mine are met. Gas-coal dust is poured into an explosion cavity, and when a pressure value in the explosion cavity is equal to that of outside atmospheric pressure, a high-energy ignition cabinet controls an ignition electrode on the explosion cavity to ignite, so that the explosion experiment of the gas-coal dust is realized, and exploded gas and the like are diffused through a gas explosion diffusion pipeline and gas explosion diffusion branches; pressure sensors and flame sensors are used for monitoring the pressure and the flame in the gas explosion diffusion pipeline during explosion in a real-time manner, and transmitting pressure data and flame data to a high-speed data acquisition unit, and the pressure data and the flame data are saved in an industrial computer. The experiment device and method disclosed by the invention are suitable for observing gas explosion of the coal mine.

The invention discloses a method for evaluating the explosive power in an explosive based on a shock wave overpressure and a quasi-static pressure. Evaluation test of the explosive power on the explosive to be evaluated and TNT, having the same mass, is carried out, an explosive power evaluation parameter kind, a measurement point laying technology and a data processing technology are determined according to the explosion characteristics in the explosive, and the method for calculating the equivalent TNT of the explosive power based on the shock wave overpressure and the quasi-static pressureis established. The method breaks through the shock wave overpressure used as a single index of the explosive power of the explosive, can completely reflect the explosive power characteristics in theexplosive, achieves a scientific and reasonable evaluation result, and can be used for selecting an explosive formula and evaluating the explosive power.

The invention discloses an automatic bursting point test instrument, which mainly comprises a temperature control system, a special reactor, an automatic sample injection mechanism, a control system and a signal and data acquisition and processing system, wherein the special reactor (a detonator on which a copper plug cap is pressed) in which an explosive sample is filled is placed in a heating furnace (a heating medium is filled in the furnace),of which the temperature is constant, to be heated through mechanical clamping handles of the automatic sample injection mechanism and the control system; when the sample burns or explodes, a contact detector and a sound sensor of the signal and data acquisition and processing system are used for signal detection; lag phase (time for burning and explosion) for the sample to burn and explode is recorded; meanwhile, the liquid level of the heating medium, namely a wood alloy bath solution, at the moment is acquired; then the bursting lag phase at other selected temperatures is tested simultaneously; and finally, the bursting point with 5s lag phase of the sample is calculated through the signal and data acquisition and processing system.

The invention relates to an ultralow temperature combustible gas explosion minimum ignition energy testing system and method. The testing system comprises a vacuumizing system, a gas distribution system, a refrigerating system, an integral circuit ignition system and a data acquiring system; an explosion container is installed in the refrigerating system, the vacuumizing system is connected with the explosion container through a connection pipeline of the gas distribution system, the gas distribution system is communicated with the inside of the explosion container through the connection pipeline thereof; the integral circuit ignition system comprises an ignition energy test table, an ignition electrode in the explosion container, a high pressure probe and a current transformer; the ignition energy test table is connected with the ignition electrode, the high pressure probe and the current transformer are respectively connected with the ignition energy test table and the ignition electrode; and the data acquiring system comprises a data acquirer, a pressure sensor and a temperature sensor which are respectively connected with the data acquirer and installed in the explosion container. The testing system disclosed by the invention is high in safety performance, precise in testing performance, and capable of precisely testing the minimum ignition energy of the combustible gas explosion under ultralow temperature and high pressure, the tested data have important significance for guiding the safety production of the oxygen-containing coal bed gas liquefication process.

The invention discloses a method for measuring reaction completeness of powdered aluminium, and the method can solve the characterized problem of dynamic reaction completeness during an aluminized explosive explosion process. In the method, based on process measurement and combined with an airtight exploder, reacting conditions of powdered aluminium are comprehensively evaluated by measuring and recording temperature and pressure schedule curves during the aluminized explosive explosion process. In comparison with the traditional explosion heat measurement method, the method aims at reaction characteristics and dynamic characteristics of the powdered aluminium. Through the method, the reaction condition of the different-specification powdered aluminium in the phase-condensed aluminized explosive with the same ratio is evaluated along with time.

The invention provides a multi-window multifunctional gas and dust explosion inhibition experiment system, and aims to meet a high-transparency quartz window characterized in that a plurality of external triggering connectors are available for externally connecting devices and a plurality of advanced optical testers are synchronously used, and to achieve a comprehensive explosion experiment testing system for preparing multiple gases. The multi-window multifunctional gas and dust explosion inhibition experiment system comprises a testing control system, an explosion container, an ignition system, a gas distribution system, a powder spraying system, a vacuuming system, a heating constant-temperature system as well as at least two optical diagnosis windows, an ignition external triggering connector and a powder spraying external triggering connector, wherein the ignition system is connected with the explosion container; the optical diagnosis windows are formed in side surfaces of the explosion container; the ignition external triggering connector is arranged on an energy-adjustable high-pressure pulse igniter; the powder spraying external triggering connector is arranged on a system testing and control main machine.

The invention specifically relates to a gas, dust explosion and explosion suppression experiment system applicable to various optical diagnosis methods, solving the problems of an existing combustible gas, dust explosion and explosion suppression experiment system that the visibility is low, combustible gas explosion/explosion suppression propagation properties only can be tested from a macroscopic level, and application of an advanced optical measurement technology cannot be met. The experiment system comprises an explosion pipeline, a vacuum-pumping system, a gas distribution system, at least two powder spraying systems and an ignition system, and further comprises a planar laser-induced fluorescence system and a main control system. The invention provides the gas, dust explosion and explosion suppression experiment system applicable to the various optical diagnosis methods, which can be combined with a device for disclosing combustion explosion/explosion suppression propagation properties by microcosmic/macroscopic parameters and takes a steel framework and high-light-transmittance quartz glass as a main body structure.

The invention discloses a combustible gas explosion feature experiment system in ultralow temperature environment. The combustible gas explosion feature experiment system comprises an explosion tank body, a temperature reducing system, a data collecting system, an ignition system and a gas distribution system, wherein the temperature reducing system is covered on the explosion tank body, and the data collecting system is provided with a thermal resistance and pressure sensor which are arranged in the explosion tank body, and a data collecting device. When the system is used for measuring the combustible gas explosion feature parameters in the ultralow temperature environment, firstly, the explosion tank body is pumped into a vacuum state, then, combustible gas to be tested is inflated into the explosion tank body, in addition, the temperature reduction is carried out, finally, the combustible gas to be tested is ignited, in addition, explosion feature parameter data in the explosion tank body is collected, and the explosion feature parameter data is stored. The combustible gas explosion feature experiment system provided by the invention has the advantages that by aiming at coal bed gas, a deep cold liquification process is utilized for testing the combustible gas explosion limit in the ultralow temperature environment, and the test and experiment research work on parameters of ultralow temperature environment combustible gas explosion pressure and pressure rising velocity and the like can also be carried out.

The invention discloses an explosive material impact and debris recovery device; a cylinder is equipped with a gas-pressure meter and a pressure regulating valve; a gun valve is placed in the cylinder, one end of a gun valve throat pipe is inserted into a gun valve casing pipe, the gun valve casing pipe is equipped with a vent valve port which can be sealed by a gun valve piston, and one end of the gun valve casing pipe is connected with a gas inflation valve and a pressure relief valve; the gun valve casing pipe is also equipped with air holes which can communicate with the gun valve casing pipe and the cylinder; one end of a launching pipe is fixed on the cylinder, a sample holder is placed in the launching pipe, and the other end of the launching pipe is equipped with a baffle cap; a recovery box is fixed on a target plate, the side face of the recovery box is equipped with a through hole, and a test sample passes through the through hole on the side face of the recovery box and isimpacted to the target plate when the test sample is divorced from the sample holder and is ejected out from the launching pipe. The device conveniently recovers debris after explosive impacting, andhas simple structure and low cost.

The invention discloses a research method of an ultralow temperature gas explosion experiment under an ultralow temperature environment. The research method comprises the following steps: firstly, vacuumizing an exploding tank; secondly, charging a combustible gas to be detected into the exploding tank and cooling; and finally, igniting the combustible gas to be detected, and acquiring and storing the explosion characteristic parameter data in the exploding tank. The research method has the following advantages: aiming at the research method of the ultralow temperature gas explosion experiment under the ultralow temperature environment, the problem that an ultralow temperature gas explosion experiment method can be carried out under the ultralow temperature environment is mainly solved; and aiming at detecting explosion limit of the combustible gas under the ultralow temperature environment, detection and experiment research work for the parameters of the combustible gas under the ultralow temperature environment, such as exploding pressure and pressure ascent rate and the like. The research method of the ultralow temperature gas explosion experiment under the ultralow temperature environment mainly aims at detecting the explosion limit of coal bed methane under the ultralow temperature environment by a cryogenic liquefying process and detecting the exploding characteristic parameters of other industrial combustible gases under the ultralow temperature environment.

The invention belongs to the field of explosives, and provides an internal explosion experiment based test method for quantitative evaluation on energy release of thermobaric explosive. The method is as below: determination of test devices; determination of the weight of the thermobaric explosive for test; determination of whether the amount of oxygen required by thermobaric explosive test is met; acquisition of quasi-static pressure data in a tank; acquisition of quasi-static pressure peak value of the thermobaric explosive; and finally acquisition of the test results of temperature and pressure effect of the thermobaric explosive. The invention employs the experiment explosion tank as a test carrier to simulate a closed environment for actual use of the thermobaric explosive, so as to obtain the for quasi-static pressure parameters of explosion of the thermobaric explosive and lay foundation for evaluation on explosion energy output the thermobaric explosive. A method for acquiring quasi-static pressure of the thermobaric explosive in limited space in different gas environment is employed to separate release energy from an anaerobic deflagration reaction stage and an explosion process of the thermobaric explosive, so as to obtain energy release in the oxygen combustion stage.

The invention discloses a high-speed collision experiment testing device for a vehicle power battery. A high-pressure air tank, a solenoid valve and an acceleration pipe are connected sequentially in a sealed manner and then are fixed by a fixing device; the other end of the acceleration pipe is in sealed connection with an explosion-proof box body; the central line of the acceleration pipe is perpendicular to the side wall of the explosion-proof box body; a mass block is arranged in the acceleration pipe; a worktable is mounted in the explosion-proof box body; a three-claw chuck is fixedly arranged on the worktable; a pressure sensor is arranged in the worktable; a rail and an index plate are mounted at the bottom of the worktable; the worktable can rotate along the rail around the center of the index plate; a protection box is mounted at the corner of the inner part of the explosion-proof box body; a temperature detection device and an image acquisition device are mounted in the protection box; a battery parameter measurement device is arranged at the outer part of the explosion-proof box body and is connected with battery negative and positive electrode connection electrode pieces on the three-claw chuck by connection wires; and a detection door is formed in the front side of the explosion-proof box body. The device can be used for realizing controllable speed, controllable pressure and controllable collision angle, and can be used for measuring parameters at the collision moment of the battery.