CN103364531B - Flammable liquid steam fires, datonation-inhibition characteristic test system - Google Patents
Flammable liquid steam fires, datonation-inhibition characteristic test system Download PDFInfo
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- CN103364531B CN103364531B CN201310300287.5A CN201310300287A CN103364531B CN 103364531 B CN103364531 B CN 103364531B CN 201310300287 A CN201310300287 A CN 201310300287A CN 103364531 B CN103364531 B CN 103364531B
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Abstract
The invention discloses that flammable liquid steam fires, datonation-inhibition characteristic test system.Comprise that blasting pot, two heated for controlling temperature, distribution, dual ignition time delay are datonation-inhibition, data test acquisition system; Blasting pot offers form and six through holes; The heating plate of two heated for controlling temperature system wraps on blasting pot, and insulation material wraps on heating plate, and temperature-controlling system connects heating plate and air heater; The air compressor of gas distributing system passes through air heater, injector and injection pipeline UNICOM through hole I, gas exhaust piping and through hole II UNICOM, vacuum pump and through hole III UNICOM, static pressure transducer and through hole IV UNICOM; The spark electrode of dual ignition time delay explosion suppression system is contained in blasting pot, is connected with delay circuit, high-voltage power supply by through hole V, is datonation-inhibitionly potted in blasting pot top, mounted inside gas generator, bottom dress nozzle; The dynamic pressure transducer of data test acquisition system is contained on through hole VI, is connected with oscillograph by signal amplifier.The present invention is easy to use, test function is many, precision is high.
Description
Technical field
The invention belongs to that flammable liquid fires, datonation-inhibition technical field of measurement and test, relate to that a kind of flammable liquid steam fires, datonation-inhibition characteristic test system.
Background technology
At present, the domestic system can tested flammable liquid explosive characteristic, datonation-inhibition characteristic still belongs to rare, and existingly to fire, mainly there is following technical barrier in datonation-inhibition test macro:
The first, existing experimental provision carries out mensuration research mainly for the blast of inflammable gas or dust, propagation characteristic and datonation-inhibition characteristic, and wherein most device can not realize the mensuration to flammable liquid explosive characteristic, datonation-inhibition characteristic;
What the second, existing experimental provision generally only can carry out normal temperature and pressure fires experiment, cannot complete the mensuration of all kinds of parameter in blast process under the condition of high temperature;
Three, the blast cavity of existing experimental provision mostly is long and narrow pipeline, and this just greatly limit the range of application of its experimental results;
Four, existing large volume, tubular or spherical experimental provision are most all at below 100L, and cause whole experimental situation to differ very large with actual environment, the directive significance that the experimental data obtained is exploded for larger space is little;
Five, possess when same experimental provision is general different and measure flammable liquid steam explosive characteristic, the ability of datonation-inhibition characteristic and the ability of research Explosion suppressant characteristic, gas-forming agent characteristic and explosion suppression device;
Six, in experimentation, device impermeability, type of heating, heat insulation effect, input mode, pipeline distribution homogeneity and precision, sensor resistance to elevated temperatures and oscillograph triggering mode all have impact on the correctness of experimental data, and carrying out of causing such to test is very difficult;
Seven, existing experimental provision generally cannot carry out Millisecond adjustment to Explosion suppressant the opportunity of shedding, and carries out all kinds of datonation-inhibition experiment accordingly.
So, in order to test the firing of flammable liquid steam, datonation-inhibition characteristic, especially Explosion suppressant characteristic, gas-forming agent characteristic be studied, be necessary to develop and be a kind ofly exclusively used in the firing of flammable liquid steam, datonation-inhibition characteristic test system.
Summary of the invention
The present invention is the above-mentioned defect existed to solve prior art, and provides that a kind of flammable liquid steam fires, datonation-inhibition characteristic test system.
The present invention is achieved by the following technical solutions:
Flammable liquid steam fires, datonation-inhibition characteristic test system, comprises blasting pot, two heated for controlling temperature system, gas distributing system, dual ignition time delay explosion suppression system, data test acquisition system;
The sidewall of described blasting pot offers respectively form and six through holes;
Described two heated for controlling temperature systems, bag heating plate, insulation material, air heater, temperature-controlling system, wherein heating plate is coated on blasting pot sidewall, and insulation material is fixed on heating plate, and temperature-controlling system connects heating plate and air heater respectively;
Described gas distributing system comprises gas exhaust piping, air compressor, injector, injection pipeline, vacuum pump, static pressure transducer, described air compressor is successively by air heater, injector and injection pipeline UNICOM through hole I, gas exhaust piping and through hole II UNICOM, vacuum pump and through hole III UNICOM, static pressure transducer and through hole IV UNICOM;
Described dual ignition time delay explosion suppression system comprises spark electrode, high-voltage power supply, delay circuit, datonation-inhibition tank, described spark electrode is arranged on the inside of blasting pot, be connected with delay circuit, high-voltage power supply by through hole V, described datonation-inhibition tank is fixed on blasting pot top, datonation-inhibition tank mounted inside gas generator, bottom is provided with nozzle;
Described data test acquisition system comprises dynamic pressure transducer, signal amplifier and oscillograph, dynamic pressure transducer be installed on be positioned at blasting pot outer wall centre position through hole VI on, be connected with oscillograph by signal amplifier.
Described blasting pot is 220L cylindricality blasting pot, is provided with suitable sealing and bearing structure, compares with similar tank body, and the volume of this blasting pot is large, and the situation of exploding with larger space in reality is properer, and measurement data is more reliable.
Described gas exhaust piping and vacuum pump are equipped with cooling tube.
Described nozzle is wide-angle Solid cone nozzle.
Described spark electrode is made up of spark plug, spray point, teflon sleeve, insulation sleeve, and spray point is fixed in teflon sleeve, and is connected with spark plug, and spark plug is fixed in insulation sleeve.
The present invention two heated for controlling temperature system comprises and being made up of heating plate and insulation material, the active heat riser that blasting pot inner chamber can be heated rapidly, air heater is as auxiliary heat riser, air heat can be sent into blasting pot, temperature-controlling system is conventional temperature-controlling system, be made up of two K type thermopairs and solid-state relay, relay, potentiometer, current transformer, reometer, Displaying Meter, protective tube, switch and wire etc., can by temperature adjusting to specified scope; Make that Exploding test is carried out to different flammable liquid and become possibility, all kinds of explosive test under High Temperature High Pressure being carried out, as: various flammable liquid, the gases such as gasoline, aviation kerosene, alcohol, acetone, liquefied petroleum gas (LPG); Gas distributing system of the present invention comprises the power combination device that hot blast can be made to move up, and flammable liquid can be made to send into the injection pipeline of blasting pot with hot-air in good time; Dual ignition time delay explosion suppression system includes the spark electrode combination gas at blasting pot lumen centers place can lighted, the high-voltage power supply that spark electrode punctures instantaneously can be made, Millisecond can be accurate to explosion suppression device and the spark electrode delay circuit that start-up time, difference regulated and controled, can by the datonation-inhibition tank of gas-forming agent and Explosion suppressant cooperation, the gas generator of gas-forming agent can be loaded, gas generator is made up of aluminium film, pressure ring, threaded cylindrical shell, removable insole pieces, the nozzle that Explosion suppressant Large-Area-Uniform can be sprayed out; Described data test acquisition system include can at high temperature under high pressure moment accurate acquisition explosion pressure signal dynamic pressure transducer, signal amplifier, oscillograph, then pass through computer data acquisition.
Compared with prior art, the present invention has the following advantages:
(1) Exploding test can be carried out to different flammable liquid, all kinds of explosive test under High Temperature High Pressure being carried out, as: various flammable liquid, the gases such as gasoline, aviation kerosene, alcohol, acetone, liquefied petroleum gas (LPG);
(2) datonation-inhibition function test and the research of gas-forming agent and Explosion suppressant cooperation can be carried out, make experimental provision function diversification;
(3) can carry out data acquisition at high operating temperatures, distinctive signals collecting mode makes data processing and research more simple, convenient;
(4) compare with similar tank body, the volume of blasting pot is large, and the situation of exploding with larger space in reality is properer, and measurement data is more reliable;
(5) energy Simultaneously test flammable liquid steam explosive characteristic, datonation-inhibition characteristic, and Explosion suppressant characteristic, gas-forming agent characteristic and explosion suppression device can be studied simultaneously;
(6) technical barriers such as the impermeability of existing experimental provision, type of heating, heat insulation effect, input mode, pipeline distribution homogeneity and precision, sensor resistance to elevated temperatures and oscillograph triggering mode are efficiently solved;
(7) made the controllable precise on opportunity of shedding of Explosion suppressant by the design of delay circuit and the selection of the Millisecond time relay, enhance the operability of experiment;
In sum, the present invention is reasonable in design, operate easy to use and test function is many, measuring accuracy is high, can effectively solve many practical problemss.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is theory diagram of the present invention;
In figure: 1-blasting pot, 2-form, 3-heating plate, 4-insulation material, 5-air heater, 6-temperature-controlling system, 7-gas exhaust piping, 8-air compressor, 9-injector, 10-injection pipeline, 11-vacuum pump, 12-static pressure transducer, 13-through hole I, 14-through hole II, 15-through hole III, 16-through hole IV, 17-spark electrode, 18-high-voltage power supply, 19-delay circuit, the datonation-inhibition tank of 20-, 21-through hole V, 22-gas generator, 23-nozzle, 24-dynamic pressure transducer, 25-signal amplifier, 26 oscillographs, 27-through hole VI.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Flammable liquid steam as shown in Figure 1 fires, datonation-inhibition characteristic test system, comprises blasting pot 1, two heated for controlling temperature system, gas distributing system, dual ignition time delay explosion suppression system, data test acquisition system;
The sidewall of described blasting pot 1 offers respectively form 2 and six through holes;
Described two heated for controlling temperature systems, bag heating plate 3, insulation material 4, air heater 5, temperature-controlling system 6, wherein heating plate 3 is coated on blasting pot 1 sidewall, and insulation material 4 is fixed on heating plate 3, and temperature-controlling system 6 connects heating plate 3 and air heater 5 respectively;
Described gas distributing system comprises gas exhaust piping 7, air compressor 8, injector 9, injection pipeline 10, vacuum pump 11, static pressure transducer 12, described air compressor 8 is successively by air heater 5, injector 9 and injection pipeline 10 UNICOM through hole I 13, gas exhaust piping 7 and through hole II 14 UNICOM, vacuum pump 11 and through hole III 15 UNICOM, static pressure transducer 12 and through hole IV 16 UNICOM;
Described dual ignition time delay explosion suppression system comprises spark electrode 17, high-voltage power supply 18, delay circuit 19, datonation-inhibition tank 20, described spark electrode 17 is arranged on the inside of blasting pot 1, be connected with high-voltage power supply 18 with delay circuit 19 by through hole V 21, described datonation-inhibition tank 20 is fixed on blasting pot 1 top, datonation-inhibition tank 20 mounted inside gas generator 22, bottom is provided with nozzle 23;
Described data test acquisition system comprises dynamic pressure transducer 24, signal amplifier 25 and oscillograph 26, dynamic pressure transducer 24 be installed on be positioned at blasting pot 1 outer wall centre position through hole VI 27 on, be connected with oscillograph 26 by signal amplifier 25.
Wherein blasting pot 1 is 220L cylindricality blasting pot, is the main part of whole system, heating plate 3 and insulation material 4 are arranged on the outer wall of blasting pot 1, initiatively heat up for system of giving, and the air heater 5 be connected by injection pipeline 10, adjustment blasting pot 1 outer wall and injection pipeline 10 liang locate the temperature-controlling system 6 of temperature, as auxiliary intensification, gas distributing system comprises for fluid provides the air compressor 8 of power source, the injection pipeline 10 of sample introduction injector 9 is housed, provides power source and be equipped with vacuum pump 11 and the gas exhaust piping 7 of same outfit cooling tube, the static pressure transducer 12 of display blasting pot 1 internal pressure of cooling tube for fluid, dual ignition time delay explosion suppression system comprises and is installed on blasting pot 1 top and realizes the datonation-inhibition tank 20 that powder sheds, the spark electrode 17 utilizing high-voltage power supply 18 to obtain high energy voltage to carry out in blasting pot 1 center discharging, and the delay circuit 19 that the above two datonation-inhibition tanks 20 are connected with spark electrode 17, wherein said spark electrode 17 is by spark plug, spray point, teflon sleeve, insulation sleeve forms, spray point is fixed in teflon sleeve, and be connected with spark plug, spark plug is fixed in insulation sleeve, the datonation-inhibition gas generator 22 of tank 20 mounted inside and the nozzle 23 of external mounting, nozzle 23 is wide-angle Solid cone nozzle, data test acquisition system comprises dynamic pressure transducer 24, the collection on the through hole VI 27 being installed on blasting pot 1 outer wall centre position and adjusts the signal amplifier 25 of signal and the oscillograph 26 of display.
Principle of work of the present invention as shown in Figure 2, during work: first, under blasting pot 1 and datonation-inhibition tank 20 assemble complete prerequisite, two heated for controlling temperature system is started in conjunction with gas distributing system, utilize heating plate 3 that the tank body of blasting pot 1 and its internal flow are heated to uniform temperature, utilize air heater 5 and gas distributing system to be continued to send into blasting pot 1 by the fluid being heated to uniform temperature, in whole temperature-rise period, injection pipeline 10 and gas exhaust piping 7 are always opening simultaneously; Maintain in the temperature range of gaseous state when temperature reaches flammable liquid steam, two heated for controlling temperature system is in keeping warm mode, and the temperature of blasting pot and injection pipeline 10 remains unchanged within a certain period of time substantially, closes gas distributing system; Secondly, close blasting pot 1, utilize vacuum pump 11 that tank body 1 is pumped into negative pressure state; Experimentally calculate determined flammable liquid sampling volume scope early stage, the flammable liquid of certain volume is sprayed in blasting pot 1 by injector 9; When gas exhaust piping 7 and vacuum pump 11 be closed condition, injection pipeline 10 for opening, start gas distributing system, by pressure in adjustment blasting pot 1, sample mixed with hot-air; Finally, adjustment delay circuit 19 delay time, data acquisition system (DAS) is in opening, high-voltage power supply 18 pairs of spark electrodes 17 charge, start-up study circuit 19, combination gas is lighted by spark electrode 17, after the certain time-delay time, datonation-inhibition tank 20 starts, Explosion suppressant is sprayed into blasting pot 1 inner chamber by nozzle 23 by gas generator 22, the blast of combination gas is suppressed, explosion pressure signal is caught by dynamic pressure transducer 24, and be transferred to oscillograph 26 by signal amplifier 25 process, oscillograph 26 shows and stores explosion pressure signal waveform.
After experiment terminates, promote flow of fresh air by gas distributing system, residual gas in cleaning blasting pot 1, and by outside gas exhaust piping 7 discharge chamber.
In experiment test, the gas sample under various temperature, pressure parameter condition can be attempted, both can carry out explosion test, also can carry out datonation-inhibition experiment.By changing Explosion suppressant, various Explosion suppressant datonation-inhibition function can be investigated.
Claims (2)
1. flammable liquid steam fire, a datonation-inhibition characteristic test system, it is characterized in that, comprise blasting pot (1), two heated for controlling temperature system, gas distributing system, dual ignition time delay explosion suppression system, data test acquisition system;
Described blasting pot (1) is 220L cylindricality blasting pot, sidewall offers respectively form (2) and six through holes;
Described two heated for controlling temperature systems, comprise heating plate (3), insulation material (4), air heater (5), temperature-controlling system (6), wherein heating plate (3) is coated on blasting pot (1) sidewall, insulation material (4) is fixed on heating plate (3), and temperature-controlling system (6) connects heating plate (3) and air heater (5) respectively;
Described gas distributing system comprises gas exhaust piping (7), air compressor (8), injector (9), injection pipeline (10), vacuum pump (11), static pressure transducer (12), described air compressor (8) is successively by air heater (5), injector (9) and injection pipeline (10) UNICOM through hole I (13), gas exhaust piping (7) and through hole II (14) UNICOM, vacuum pump (11) and through hole III (15) UNICOM, static pressure transducer (12) and through hole IV (16) UNICOM; Described gas exhaust piping (7) and vacuum pump (11) are equipped with cooling tube;
Described dual ignition time delay explosion suppression system comprises spark electrode (17), high-voltage power supply (18), delay circuit (19), datonation-inhibition tank (20), described delay circuit (19) is for connecting datonation-inhibition tank (20) and spark electrode (17), delay circuit (19) can be accurate to Millisecond and regulate and control datonation-inhibition tank (20) and difference spark electrode (17) start-up time, described spark electrode (17) is arranged on the inside of blasting pot (1), be connected with high-voltage power supply (18) with delay circuit (19) by through hole V (21), described datonation-inhibition tank (20) is fixed on blasting pot (1) top, datonation-inhibition tank (20) mounted inside gas generator (22), bottom is provided with wide-angle Solid cone nozzle (23),
Described data test acquisition system comprises dynamic pressure transducer (24), signal amplifier (25) and oscillograph (26), dynamic pressure transducer (24) is installed on and is positioned on the through hole VI (27) in blasting pot (1) outer wall centre position, is connected with oscillograph (26) by signal amplifier (25).
2. flammable liquid steam according to claim 1 fire, datonation-inhibition characteristic test system, it is characterized in that, described spark electrode (17) is made up of spark plug, spray point, teflon sleeve, insulation sleeve, spray point is fixed in teflon sleeve, and be connected with spark plug, spark plug is fixed in insulation sleeve.
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| CN201310300287.5A CN103364531B (en) | 2013-07-17 | 2013-07-17 | Flammable liquid steam fires, datonation-inhibition characteristic test system |
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| CN103364531B true CN103364531B (en) | 2015-09-30 |
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