CN110568015A - Gas explosion characteristic parameter testing device - Google Patents
Gas explosion characteristic parameter testing device Download PDFInfo
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- CN110568015A CN110568015A CN201910711570.4A CN201910711570A CN110568015A CN 110568015 A CN110568015 A CN 110568015A CN 201910711570 A CN201910711570 A CN 201910711570A CN 110568015 A CN110568015 A CN 110568015A
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- 238000004880 explosion Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 40
- 230000030279 gene silencing Effects 0.000 claims abstract description 39
- 238000003466 welding Methods 0.000 claims abstract description 8
- 230000000007 visual effect Effects 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910000617 Mangalloy Inorganic materials 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 11
- 230000001960 triggered effect Effects 0.000 description 9
- 239000003245 coal Substances 0.000 description 7
- 238000004200 deflagration Methods 0.000 description 6
- 238000005474 detonation Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 5
- 239000002360 explosive Substances 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
- G01N25/54—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
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- Chemical Kinetics & Catalysis (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Food Science & Technology (AREA)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a gas explosion characteristic parameter testing device which comprises a flame accelerating tube, a silencing component, an ignition electrode, a methane gas cylinder, a compressed air cylinder, a gas mixing tank, a vacuum pump and an adjustable igniter, wherein the vacuum pump is communicated with the flame accelerating tube through a pipeline, a first vacuum valve is arranged on the pipeline through which the vacuum pump is communicated with the flame accelerating tube, the gas mixing tank is communicated with the flame accelerating tube through a pipeline, a third gas inlet valve is arranged on the pipeline through which the gas mixing tank is communicated with the flame accelerating tube, the methane gas cylinder is communicated with the gas mixing tank through a pipeline, and a first gas inlet valve is arranged on the pipeline through which the methane gas cylinder is communicated with the gas mixing tank. The invention realizes the test of gas explosion characteristic parameters through the sensor and the high-speed camera, processes and displays data through the computer and the storage recorder, the outer wall and the inner wall of the flame accelerating tube are fixed in an explosion welding mode, the strength of the flame accelerating tube is ensured, meanwhile, the inner wall of the flame accelerating tube is not easy to rust and corrode, and noise is weakened and absorbed through the arrangement of the silencing component.
Description
Technical Field
The invention relates to the technical field of gas explosion prevention and control, in particular to a gas explosion characteristic parameter testing device.
Background
China is a large energy using country, and the energy structure composition of China is characterized by being rich in coal, less in oil and short of gas. The special energy structure enables the status of coal as the leading energy source to be incapable of being replaced within a long period of time, although the coal resources in China are abundant, the storage conditions are severe, the number of open-pit coal mines is small, most of the open-pit coal mines are underground deposits, coal mine disaster accidents are frequent along with the increase of the mining depth, most of the accidents are caused by gas explosion, and serious casualties and huge property loss are caused.
the gas explosion seriously affects the development of the coal industry in China, so that the development of related research on gas explosion prevention is very necessary, most of the current experimental devices for researching the gas explosion are common steel flame accelerating pipelines, but the devices have certain defects, for example, the inner wall of the common steel pipeline is easy to rust, the flame propagation state cannot be visually observed, huge noise can be generated during the deflagration discharge of the gas in the experimental process, and the like, and the problems restrict the deep research on the gas explosion prevention to a certain extent, so that a novel gas explosion testing system is necessary to be invented to solve the defects of the current experimental devices.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a gas explosion characteristic parameter testing apparatus, which implements testing of gas explosion characteristic parameters through a sensor and a high-speed camera, processes and displays data through a computer and a storage recorder, fixes the outer wall and the inner wall of a flame acceleration tube in an explosive welding manner, ensures the strength of the flame acceleration tube, simultaneously ensures that the inner wall of the flame acceleration tube is not prone to rusting and corrosion, and weakens and absorbs noise through the arrangement of a noise reduction component.
The gas explosion characteristic parameter testing device comprises a flame accelerating tube, a silencing component, an ignition electrode, a methane gas cylinder, a compressed air cylinder, a gas mixing tank and a vacuum pump, wherein the gas mixing tank is communicated with the flame accelerating tube, the methane gas cylinder and the compressed air cylinder through pipelines, the vacuum pump is communicated with the gas mixing tank and the flame accelerating tube through pipelines, and the silencing component and the ignition electrode are respectively arranged at two ends of the flame accelerating tube.
Preferably, the silencing assembly comprises a silencing barrel, the silencing barrel is honeycomb-shaped, a plurality of annular plates are arranged inside the silencing barrel, and the annular plates are arranged at intervals and are connected with the inner wall of the silencing barrel.
Preferably, a slide rail base is arranged below the silencing barrel, and the silencing barrel is in rolling connection with the slide rail base through rollers.
Preferably, the annular plate is made of foamed ceramic, the outer diameter of the annular plate is smaller than the inner diameter of the silencing tube, and the inner diameter of the annular plate is larger than the maximum outer diameter of the flame accelerating tube.
Preferably, the flame accelerating tube comprises a plurality of square tubes, the square tubes are fixed through flanges, the square tubes comprise manganese steel outer tubes and stainless steel inner tubes, and the manganese steel outer tubes and the stainless steel inner tubes are composited through explosive welding.
Preferably, two groups of visual observation windows are installed on the side wall of the flame accelerating tube, the two groups of visual observation windows are symmetrically arranged about the axis of the flame accelerating tube, concave reflectors are arranged on the outer sides of the two groups of visual observation windows, a light source is arranged on one side close to one of the concave reflectors, a high-speed camera is arranged on one side close to the other concave reflector, the two groups of concave reflectors form a reflection light path, a macro lens is installed on one side, close to the reflection light path, of the high-speed camera, a knife edge is arranged on one side, close to the reflection light path, of the macro lens, and the high-speed camera is externally connected with a computer through a wire.
Preferably, the visual observation window comprises an observation window flange and quartz glass, the observation window flange is close to one side of the flame accelerating tube, the quartz glass is installed inside the installation groove, bolt holes are formed in the outer wall of the flame accelerating tube and the observation window flange, and the flame accelerating tube and the observation window flange are fixed through bolts.
Preferably, the ignition electrode is externally connected with an adjustable igniter through a lead, the side wall of the flame accelerating tube is also provided with a pressure sensor, a temperature sensor and a photoelectric sensor, and the pressure sensor, the temperature sensor and the photoelectric sensor are externally connected with a storage recorder through leads; the ignition electrode is an iridium ignition electrode with high melting point, high temperature and high pressure resistance and stable ignition.
Preferably, a digital vacuum meter is further mounted on the outer wall of the flame accelerating tube.
Preferably, an end enclosure and a diaphragm are sequentially arranged between the silencing barrel and the flame accelerating tube along the direction from the silencing barrel to the ignition electrode.
In the invention:
(1) The parameter test of gas deflagration flame propagation is realized through the pressure sensor, the temperature sensor, the photoelectric sensor and the high-speed camera, and the data are processed and displayed through the computer and the storage recorder, so that the change rule of gas deflagration flame characteristic parameters under various working conditions is determined.
(2) The outer wall of the flame accelerating tube is ZGMn13-4 manganese steel tube, the inner wall of the flame accelerating tube is 0Cr18Ni9 stainless steel, and the flame accelerating tube is compounded into a composite metal material in an explosion welding mode, so that the strength of the flame accelerating tube is ensured, and meanwhile, the inner wall of the flame accelerating tube has corrosion resistance.
(3) The inner wall of the flame acceleration pipe has anti-rusting performance, so that the inner wall of the flame acceleration pipe is prevented from rusting, the turbulence degree of gas detonation flame propagation is further increased, and the accuracy of the device for testing the parameters of the gas detonation flame propagation is lowered.
(4) the visual observation window is arranged on the tube wall of the flame accelerating tube, the light source and the two sets of symmetrically arranged concave reflectors are used for forming a reflection light path, the image is captured through the high-speed camera, and the image is processed and displayed through the computer, so that the deflagration flame can be observed more intuitively, and the follow-up research is facilitated.
(5) The flame accelerating tube is ignited by the ignition electrode, the ignition electrode is connected with the adjustable igniter through an electric signal, the ignition voltage and the ignition time are set by the adjustable igniter, the adjustable ranges are respectively 10-220V and 0-10s, and the ignition energy is changed by changing the ignition voltage and the ignition time, so that the characteristic parameters of gas deflagration flame under different ignition energies are measured.
(6) One side that ignition electrode was kept away from to flame accelerating tube is provided with the amortization subassembly, collide with the sound wave through the annular plate, the annular plate material is made for foamed ceramic, the energy of sound wave is weakened in the collision of sound wave and annular plate, and the amortization subassembly is the stainless steel jar body that has cellular inner wall, the jar body is the sudden expansion structure, the sound wave carries out collision reflection many times on cellular inner wall, the harmful effect that the decay gas detonation was released and is produced, and weaken the huge noise that gas detonation produced by a wide margin, make the maximum sound pressure level of noise reduce 45% -65%, the security of experimental study has not only been guaranteed and the experimental environment that has kept quiet relatively has still been kept.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a gas explosion characteristic parameter testing device according to the present invention;
FIG. 2 is a schematic structural diagram of a visual observation window according to the present invention;
FIG. 3 is a schematic structural diagram of a muffler assembly according to the present invention;
Fig. 4 is a schematic structural diagram of the seal head and the membrane provided by the invention.
In the figure: 1-flame accelerating tube, 2-flange, 3-bolt nut, 4-visual observation window, 5-observation window flange, 6-quartz glass, 7-bolt hole, 8-seal head, 9-diaphragm, 10-silencing component, 11-annular plate, 12-fixing piece, 13-roller, 14-slide rail base, 15-ignition electrode, 16-digital vacuum meter, 17-pressure sensor, 18-temperature sensor, 19-photoelectric sensor, 20-first vacuum valve, 21-second vacuum valve, 22-first air inlet valve, 23-second air inlet valve, 24-third air inlet valve, 25-methane cylinder, 26-compressed air cylinder, 27-gas mixing cylinder, 28-pressure meter, 29-rupture membrane, 30-a pressure release valve, 31-a vacuum pump, 32-an adjustable igniter, 33-a high-speed camera, 34-a computer, 35-a storage recorder, 36-a light source, 37-a concave reflector, 38-a knife edge and 39-a macro lens.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1-4, a gas explosion characteristic parameter testing device includes a flame accelerating tube 1, a silencing component 10, an ignition electrode 15, a methane gas cylinder 25, a compressed air cylinder 26, a gas mixing tank 27, a vacuum pump 31, and an adjustable igniter 32, where the vacuum pump 31 is communicated with the flame accelerating tube 1 through a pipeline, a first vacuum valve 20 is installed on the pipeline where the vacuum pump 31 is communicated with the flame accelerating tube 1, the gas mixing tank 27 is communicated with the flame accelerating tube 1 through a pipeline, a third gas inlet valve 24 is installed on the pipeline where the gas mixing tank 27 is communicated with the flame accelerating tube 1, the methane gas cylinder 25 is communicated with the gas mixing tank 27 through a pipeline, a first gas inlet valve 22 is installed on the pipeline where the methane gas cylinder 25 is communicated with the gas mixing tank 27, the compressed air cylinder 26 is communicated with the gas mixing tank 27 through a pipeline, a second gas inlet valve 23 is installed on the pipeline where the compressed air cylinder 26 is communicated with the gas mixing tank 27, the gas mixing tank 27 is communicated with the vacuum pump 31 through a pipeline, a second vacuum valve 21 is installed on the pipeline of the gas mixing tank 27 communicated with the vacuum pump 31, the silencing assembly 10 is installed on one side of the flame accelerating tube 1, the ignition electrode 15 is installed on the other side of the flame accelerating tube 1, the inner wall of the silencing assembly 10 is of a honeycomb structure, and the annular plate 11 is installed on the inner wall of the silencing assembly 10; a plurality of annular plates 11 are arranged on the inner wall of the silencing assembly 10, a fixing piece 12 is arranged between each annular plate 11 and the inner wall of the silencing assembly 10, and the fixing piece 12 is respectively fixed with the annular plates 11 and the inner walls of the silencing assemblies 10 through bolts and nuts; a sliding rail base 14 is arranged below the silencing component 10, and the silencing component 10 is in rolling connection with the sliding rail base 14 through a roller 13; the annular plate 11 is made of foamed ceramic, the outer diameter of the annular plate 11 is smaller than the inner diameter of the noise reduction assembly 10, and the inner diameter of the annular plate 11 is larger than the maximum outer diameter of the flame accelerating tube 1; the flame accelerating tube 1 is composed of a plurality of square tubes, the square tubes are fixed through flanges 2, the outer walls of the square tubes are manganese steel tubes, the inner walls of the square tubes are made of stainless steel, and the outer walls and the inner walls are compounded through explosive welding; two groups of visual observation windows 4 are arranged in the middle of the flame accelerating tube 1, the two groups of visual observation windows 4 are symmetrically arranged corresponding to the two ends of the pipeline, two groups of concave reflectors 37 are symmetrically arranged at the outer sides of the two groups of visual observation windows 4, a light source 36 is arranged at one side close to one group of concave reflectors 37, the two groups of concave reflectors 37 form a reflection light path, a high-speed camera 33 is arranged at one side close to the other group of concave reflectors 37, a macro lens 39 is arranged at one side of the high-speed camera 33 close to the reflection light path, a knife edge 38 is arranged on one side of the macro lens 39 close to the reflection light path, the high-speed camera 33 is externally connected with a computer 34 through a lead, the side wall of the flame accelerating tube 1 is also provided with a pressure sensor 17, a temperature sensor 18 and a photoelectric sensor 19, the pressure sensor 17, the temperature sensor 18 and the photoelectric sensor 19 are externally connected with a storage recorder 35 through leads; the visual observation window 5 comprises an observation window flange 5 and quartz glass 6, wherein an installation groove is formed in one side, close to the outer wall of the flame accelerating tube 1, of the observation window flange 5, the quartz glass 6 is installed inside the installation groove, bolt holes 7 are formed in the outer wall of the flame accelerating tube 1 and the observation window flange 5, and the flame accelerating tube 1 and the observation window flange 5 are fixed through bolts; the ignition electrode 15 is externally connected with an adjustable igniter 32 through a lead, and the ignition electrode 15 is in electric signal connection with the adjustable igniter 32; the outer wall of the flame accelerating tube 1 is also provided with a digital vacuum meter 16; and a seal head 8 and a diaphragm 9 are sequentially arranged between the silencing component 10 and the flame accelerating tube 1.
The flame accelerating tube 1 is a segmented square tube made of composite metal, the composite structure is a ZGMn13-4 manganese steel tube, the inner wall is compounded with a layer of 0Cr18Ni9 stainless steel with the thickness of 3-5mm by an explosive welding means, and all the sections of the pipeline are connected together by a flange 2 and a bolt nut 3; the visual observation window 4 (symmetrically arranged on two sides of the pipeline) is formed by fixing an observation window flange 5 and quartz glass 6 on the outer wall of the pipeline through bolts, a fluororubber gasket is additionally arranged between the outer wall of the flame accelerating tube 1 and the inner side of the quartz glass 6 to ensure the air tightness, and the thickness of the quartz glass 6 is 15mm, and the length and the width of the quartz glass 6 are smaller than the size of the single-section pipeline 1; the diaphragm 9 is a tin sheet with the thickness of 0.6-1.5mm and is arranged at the tail end of the pipeline together with the seal head 8; the inner wall of the silencing component 10 is of a honeycomb structure, a plurality of porous annular plates 11 are arranged inside the silencing component, 3-5 annular plates 11 are sequentially perpendicular to the axial direction of the tank body at intervals of 20-40cm and are fixed in the tank body, the annular plates 11 are made of foamed ceramics and have the thickness of 15-30cm, the pressure sensor 17, the temperature sensor 18 and the photoelectric sensor 19 are connected with the storage recorder 35, and the photoelectric sensors 19 are arranged at intervals of 30-50cm at equal intervals; the adjustable igniter 32 changes ignition energy by adjusting ignition voltage and ignition time; the macro lens 39 is mounted on the high-speed camera 33; the high-speed camera 33 is used for shooting over against the knife edge 38 and is connected with the computer 34; the storage recorder 35 is a multi-channel multifunctional recorder and has an oscilloscope function.
Example 1
(1) As shown in fig. 1, a flame accelerating tube 1, a flange 2, a bolt and nut 3, a visual observation window 4, a seal head 8, a membrane 9, a silencing component 10, a roller 13, a slide rail base 14, an ignition electrode 15, a digital vacuum meter 16, a pressure sensor 17, a temperature sensor 18, a photoelectric sensor 19, a first vacuum valve 20, a second vacuum valve 21, a first air inlet valve 22, a second air inlet valve 23, a third air inlet valve 24, a methane gas cylinder 25, a compressed air cylinder 26, a gas mixing cylinder 27, a pressure gauge 28, a rupture membrane 29, a pressure relief valve 30, a vacuum pump 31, an adjustable igniter 32, a macro lens 39, a high-speed camera 33, a computer 34, a storage recorder 35, a light source 36, a concave reflector 37 and a knife edge 38 are connected to form a test device, and the airtightness of the whole system is tested, and an experiment can be developed after no gas leakage phenomenon is.
(2) The second vacuum valve 21 is opened first, all other valves are kept closed, the vacuum pump 31 is started again to vacuumize the mixed gas tank 27 to-101 kpa, and then the second vacuum valve 21 and the vacuum pump 31 are closed in sequence.
(3) The first gas inlet valve 22 and the methane gas cylinder 25 are opened, other valves are kept closed, and after the methane gas with the volume fraction required by the experiment is distributed into the mixed gas tank 27, the methane gas cylinder 11 and the first gas inlet valve 22 are closed in sequence.
(4) The second air inlet valve 23 and the compressed air bottle 26 are opened, other valves are kept closed, and after the compressed air with the volume fraction required by the experiment is distributed into the air mixing tank 27, the compressed air bottle 12 and the second air inlet valve 23 are closed in sequence.
(5) The mixed gas in the gas mixing tank 27 is kept still for 3-5 hours to ensure that the gas is uniformly mixed.
(6) and opening the digital vacuum meter 16 and the first vacuum valve 20, keeping other valves closed, opening the vacuum pump 31 to vacuumize the flame accelerating tube 1 to-101 kpa, and then closing the first vacuum valve 20 and the vacuum pump 31 in sequence.
(7) And opening the third air inlet valve 24, keeping other valves closed, distributing the premixed gas in the gas mixing tank 27 into the flame accelerating tube 1, and closing the third air inlet valve 24 and the digital vacuum meter 16 in sequence when the reading of the digital vacuum meter 16 reaches 0 kPa.
(8) The high-speed camera 33, the storage recorder 35 and the light source 36 are sequentially started, and the high-speed camera 33 is started in the computer 34 to control software to set the high-speed camera 33 to be in a state to be triggered; the storage recorder 35 is internally provided with trigger parameters of the pressure sensor 17, the temperature sensor 18 and the photoelectric sensor 19 respectively, and keeps the sensors in a state to be triggered.
(9) Keeping all the valves in a closed state, opening the adjustable igniter to set the required ignition energy to ignite the ignition electrode 15; igniting the premixed gas in the flame accelerating tube 1, so that the high-speed camera 33 and each sensor on the flame accelerating tube 1 are triggered; the flame propagation image captured by the high-speed camera 33 is stored in the computer 34, and the data measured by the pressure sensor 17, the temperature sensor 18, and the photoelectric sensor 19 is stored in the memory recorder 35.
(10) And (3) removing the seal head 8, replacing the membrane 9, and changing different ignition voltages and ignition times in the processes of repeating (6) to (9) to research the gas detonation flame propagation characteristic parameters under different ignition energy conditions.
Example 2
(1) The gas explosion characteristic parameter test system is the same as that in the embodiment 1, the air tightness of the whole system is tested before the experiment, and the experiment can be carried out after no air leakage phenomenon is determined.
(2) The second vacuum valve 21 is opened first, all other valves are kept closed, the vacuum pump 31 is started again to vacuumize the mixed gas tank 27 to-101 kpa, and then the second vacuum valve 21 and the vacuum pump 31 are closed in sequence.
(3) The first gas inlet valve 22 and the methane gas cylinder 25 are opened, other valves are kept closed, and after the methane gas with the volume fraction required by the experiment is distributed into the mixed gas tank 27, the methane gas cylinder 11 and the first gas inlet valve 22 are closed in sequence.
(4) The second air inlet valve 23 and the compressed air bottle 26 are opened, other valves are kept closed, and after the compressed air with the volume fraction required by the experiment is distributed into the air mixing tank 27, the compressed air bottle 12 and the second air inlet valve 23 are closed in sequence.
(5) The mixed gas in the gas mixing tank 27 is kept still for 3-5 hours to ensure that the gas is uniformly mixed.
(6) And opening the digital vacuum meter 16 and the first vacuum valve 20, keeping other valves closed, opening the vacuum pump 31 to vacuumize the flame accelerating tube 1 to-101 kpa, and then closing the first vacuum valve 20 and the vacuum pump 31 in sequence.
(7) And opening the third air inlet valve 24, keeping other valves closed, distributing the premixed gas in the gas mixing tank 27 into the flame accelerating tube 1, and closing the third air inlet valve 24 and the digital vacuum meter 16 in sequence when the reading of the digital vacuum meter 16 reaches 0 kPa.
(8) The high-speed camera 33, the storage recorder 35 and the light source 36 are sequentially started, and the high-speed camera 33 is started in the computer 34 to control software to set the high-speed camera 33 to be in a state to be triggered; the storage recorder 35 is internally provided with trigger parameters of the pressure sensor 17, the temperature sensor 18 and the photoelectric sensor 19 respectively, and keeps the sensors in a state to be triggered.
(9) Keeping all the valves in a closed state, opening the adjustable igniter to set the required ignition energy to ignite the ignition electrode 15; igniting the premixed gas in the flame accelerating tube 1, so that the high-speed camera 33 and each sensor on the flame accelerating tube 1 are triggered; the flame propagation image captured by the high-speed camera 33 is stored in the computer 34, and the data measured by the pressure sensor 17, the temperature sensor 18, and the photoelectric sensor 19 is stored in the memory recorder 35.
(10) And (3) removing the seal head 8, replacing the diaphragm 9, and changing the volume fraction of each gas in the gas mixing tank 27 in the processes of repeating the steps (2) to (9) to research the gas detonation flame propagation characteristic parameters under the conditions of different equivalence ratios.
Example 3
(1) The gas explosion characteristic parameter test system is similar to that in the embodiment 1, the air tightness of the whole system is tested in the same way before the experiment, and the experiment can be carried out after no air leakage phenomenon is determined.
(2) The second vacuum valve 21 is opened first, all other valves are kept closed, the vacuum pump 31 is started again to vacuumize the mixed gas tank 27 to-101 kpa, and then the second vacuum valve 21 and the vacuum pump 31 are closed in sequence.
(3) The first gas inlet valve 22 and the methane gas cylinder 25 are opened, other valves are kept closed, and after the methane gas with the volume fraction required by the experiment is distributed into the mixed gas tank 27, the methane gas cylinder 11 and the first gas inlet valve 22 are closed in sequence.
(4) The second air inlet valve 23 and the compressed air bottle 26 are opened, other valves are kept closed, and after the compressed air with the volume fraction required by the experiment is distributed into the air mixing tank 27, the compressed air bottle 12 and the second air inlet valve 23 are closed in sequence.
(5) The mixed gas in the gas mixing tank 27 is kept still for 3-5 hours to ensure that the gas is uniformly mixed.
(6) And opening the digital vacuum meter 16 and the first vacuum valve 20, keeping other valves closed, opening the vacuum pump 31 to vacuumize the flame accelerating tube 1 to-101 kpa, and then closing the first vacuum valve 20 and the vacuum pump 31 in sequence.
(7) And opening the third air inlet valve 24, keeping other valves closed, distributing the premixed gas in the gas mixing tank 27 into the flame accelerating tube 1, and closing the third air inlet valve 24 and the digital vacuum meter 16 in sequence when the reading of the digital vacuum meter 16 reaches 0 kPa.
(8) The high-speed camera 33, the storage recorder 35 and the light source 36 are sequentially started, and the high-speed camera 33 is started in the computer 34 to control software to set the high-speed camera 33 to be in a state to be triggered; the storage recorder 35 is internally provided with trigger parameters of the pressure sensor 17, the temperature sensor 18 and the photoelectric sensor 19 respectively, and keeps the sensors in a state to be triggered.
(9) Keeping all the valves in a closed state, opening the adjustable igniter to set the required ignition energy to ignite the ignition electrode 15; igniting the premixed gas in the flame accelerating tube 1, so that the high-speed camera 33 and each sensor on the flame accelerating tube 1 are triggered; the flame propagation image captured by the high-speed camera 33 is stored in the computer 34, and the data measured by the pressure sensor 17, the temperature sensor 18, and the photoelectric sensor 19 is stored in the memory recorder 35.
(10) The seal head 8 is detached, the membrane 9 is replaced, the steps (6) - (9) are repeated, and the high-speed camera 33, the macro lens 39, the light source 36, the concave reflector 37 and the knife edge 38 can be used for researching the fine structure of the gas deflagration flame front through a visual observation window of the flame accelerating tube 1.
In conclusion, this gas explosion characteristic parameter testing arrangement passes through the test that sensor and high-speed camera realized gas explosion characteristic parameter, handles the demonstration through computer and storage record appearance to data, and flame accelerating tube outer wall is fixed with the inner wall adoption explosive welding's mode, guarantees the difficult rust corrosion of flame accelerating tube inner wall when guaranteeing flame accelerating tube intensity to through setting up amortization subassembly, weaken and noise absorption.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. a gas explosion characteristic parameter testing device is characterized in that: the device comprises a flame accelerating tube, a silencing assembly, an ignition electrode, a methane gas cylinder, a compressed air cylinder, a gas mixing tank and a vacuum pump, wherein the gas mixing tank is communicated with the flame accelerating tube, the methane gas cylinder and the compressed air cylinder through pipelines, the vacuum pump is communicated with the gas mixing tank and the flame accelerating tube through pipelines, and the silencing assembly and the ignition electrode are respectively installed at two ends of the flame accelerating tube.
2. The gas explosion characteristic parameter testing device according to claim 1, wherein: the silencing component comprises a silencing barrel, the silencing barrel is honeycomb-shaped, a plurality of annular plates are arranged inside the silencing barrel, and the annular plates are arranged at intervals and are connected with the inner wall of the silencing barrel.
3. The gas explosion characteristic parameter testing device according to claim 2, wherein: a sliding rail base is arranged below the silencing barrel, and the silencing barrel is connected with the sliding rail base in a rolling mode through rolling wheels.
4. The gas explosion characteristic parameter testing device according to claim 2, wherein: the annular plate is made of foamed ceramic, the outer diameter of the annular plate is smaller than the inner diameter of the silencing barrel, and the inner diameter of the annular plate is larger than the maximum outer diameter of the flame accelerating tube.
5. The gas explosion characteristic parameter testing device according to claim 1, wherein: the flame accelerating tube is formed by a plurality of square tubes, the square tubes are fixed through flanges, the square tubes comprise manganese steel outer tubes and stainless steel inner tubes, and the manganese steel outer tubes and the stainless steel inner tubes are composited through explosion welding.
6. The gas explosion characteristic parameter testing device according to claim 1, wherein: the side wall of the flame accelerating tube is provided with two groups of visual observation windows, the two groups of visual observation windows are symmetrically arranged about the axis of the flame accelerating tube, the outer sides of the two groups of visual observation windows are respectively provided with a concave reflector, one side of the concave reflector close to one of the two groups of visual observation windows is provided with a light source, one side of the concave reflector close to the other group of visual observation windows is provided with a high-speed camera, the two groups of concave reflectors form a reflection light path, one side of the high-speed camera close to the reflection light path is provided with a macro lens, one side of the macro lens close to the reflection light path is provided with a knife edge, and the.
7. The gas explosion characteristic parameter testing device according to claim 6, wherein: the visual observation window comprises an observation window flange and quartz glass, wherein the observation window flange is close to one side of the flame accelerating tube, a mounting groove is formed in one side of the flame accelerating tube, the quartz glass is mounted inside the mounting groove, bolt holes are formed in the outer wall of the flame accelerating tube and the observation window flange, and the flame accelerating tube is fixed with the observation window flange through bolts.
8. The gas explosion characteristic parameter testing device according to claim 1, wherein: the ignition electrode is externally connected with an adjustable igniter through a lead, the side wall of the flame accelerating tube is also provided with a pressure sensor, a temperature sensor and a photoelectric sensor, and the pressure sensor, the temperature sensor and the photoelectric sensor are externally connected with a storage recorder through leads.
9. The gas explosion characteristic parameter testing device according to claim 1, wherein: and the outer wall of the flame accelerating tube is also provided with a digital vacuum meter.
10. The gas explosion characteristic parameter testing device according to claim 2, wherein: and a seal head and a diaphragm are sequentially arranged between the silencing barrel and the flame accelerating tube along the direction from the silencing barrel to the ignition electrode.
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| CN201910711570.4A CN110568015A (en) | 2019-08-02 | 2019-08-02 | Gas explosion characteristic parameter testing device |
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| CN201910711570.4A CN110568015A (en) | 2019-08-02 | 2019-08-02 | Gas explosion characteristic parameter testing device |
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Application publication date: 20191213 |