CN115372585A - Visual gas explosion bidirectional propagation experimental device and test method thereof - Google Patents
Visual gas explosion bidirectional propagation experimental device and test method thereof Download PDFInfo
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- CN115372585A CN115372585A CN202211031828.4A CN202211031828A CN115372585A CN 115372585 A CN115372585 A CN 115372585A CN 202211031828 A CN202211031828 A CN 202211031828A CN 115372585 A CN115372585 A CN 115372585A
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- 238000004880 explosion Methods 0.000 title claims abstract description 79
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 22
- 230000000007 visual effect Effects 0.000 title abstract description 6
- 238000010998 test method Methods 0.000 title abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- 238000002474 experimental method Methods 0.000 claims description 13
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 9
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 238000012800 visualization Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 2
- 239000003245 coal Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- 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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- 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
- G01N33/227—Explosives, e.g. combustive properties thereof
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Abstract
The invention discloses an experimental device for visual gas explosion bidirectional propagation and a test method thereof. The gas distribution device comprises a vacuum pump and a high-pressure gas cylinder, the vacuum pump is communicated with the pipeline middle section, the high-pressure gas cylinder is communicated with the pipeline middle section, and combustible gas is filled in the high-pressure gas cylinder. The explosion data acquisition device comprises a pressure sensor, a flame sensor, a data acquisition instrument and a high-speed camera, wherein the pressure sensor and the flame sensor are arranged on the middle section of the pipeline, the left section of the pipeline and the right section of the pipeline, and the pressure sensor and the flame sensor are respectively connected with the data acquisition instrument. The invention can realize the visual test of the gas explosion bidirectional transmission process and obtain the data of explosion bidirectional transmission.
Description
Technical Field
The invention relates to the technical field of gas explosion research, in particular to an experimental device for visualizing bidirectional propagation of gas explosion and a testing method thereof.
Background
Coal is always the main energy source of China, but the coal mining safety faces the threat of gas. In the production process of coal mines, gas explosion accidents happen occasionally, and serious casualties and economic losses are caused. The research on the propagation rule and the flame characteristics of the gas explosion has important significance for well evaluating the disaster-causing danger of the gas explosion and preventing and treating the gas explosion. In the coal mine production process, due to uncertainty of a gas accumulation area and the position of an ignition source, the explosion source point of the gas explosion may not be located at the boundary of the area, so that the gas explosion is propagated in two directions. At present, in related fields at home and abroad, the test of gas explosion propagation is generally carried out in a steel pipeline ignited at one end, but the study on the two-way propagation rule and the flame characteristics of the gas explosion caused by non-end ignition is lacked.
Disclosure of Invention
The invention aims to provide a visual gas explosion bidirectional propagation experimental device and a test method thereof, which can realize explosion bidirectional propagation, can observe and record an explosion process in real time and provide scientific data for researching a gas explosion propagation rule and flame characteristics.
In order to achieve the purpose, the invention discloses a visual gas explosion bidirectional propagation experimental device on one hand, which comprises a transparent pipeline, a gas distribution device, an ignition device and an explosion data acquisition device, wherein the transparent pipeline comprises a pipeline middle section, a pipeline left section and a pipeline right section, one end of the pipeline left section is open, the other end of the pipeline left section is fixedly connected with the pipeline middle section, and the joint of the pipeline left section and the pipeline right section is sealed by adopting a BOPP film; one end of the right section of the pipeline is open, the other end of the right section of the pipeline is fixedly connected with the middle section of the pipeline, and the joint is sealed by adopting a BOPP film; the gas distribution device comprises a vacuum pump and a high-pressure gas cylinder, the vacuum pump is communicated with the pipeline middle section pipeline, the high-pressure gas cylinder is communicated with the pipeline middle section pipeline, and combustible gas is filled in the high-pressure gas cylinder; the ignition device is connected with the middle section of the pipeline; the explosion data acquisition device comprises a pressure sensor, a flame sensor, a data acquisition instrument and a high-speed camera, wherein the pressure sensor and the flame sensor are arranged on the middle pipeline section, the left pipeline section and the right pipeline section respectively, and the pressure sensor and the flame sensor are connected with the data acquisition instrument respectively; the high-speed camera is connected with the computer and is used for observing the explosion process of the combustible gas in the transparent pipeline in real time.
Further, the ignition device comprises a high-voltage capacitive discharge controller and an ignition rod, the ignition rod is electrically connected with the high-voltage capacitive discharge controller, and the ignition rod extends into the middle section of the pipeline.
Further, the ignition end of the ignition rod is located at the center of the middle section of the pipeline.
Further, the combustible gas in the high-pressure gas cylinder is methane.
Furthermore, the air distribution device further comprises a data pressure gauge, and the data pressure gauge is arranged on the middle section of the pipeline.
On the other hand, the invention also discloses an experimental method for visualizing the bidirectional propagation of gas explosion, which comprises the following steps:
s1, taking the middle section of the pipeline as an explosion cavity, and checking the air tightness of the explosion cavity before an experiment;
s2, vacuumizing the explosion cavity to a certain negative pressure by adopting a vacuum pump;
s3, closing a valve between the vacuum pump and the explosion cavity, then closing the vacuum pump, opening the high-pressure gas cylinder, and filling methane gas into the explosion cavity;
and S4, turning on the data acquisition instrument and the high-speed camera, then turning on the ignition device, setting ignition energy and starting an ignition switch.
Further, in the step S2, the negative pressure value satisfies the formula (P-P) 0 ) 0.1= -X%, in which, P 0 For air pressure, X% is the experimentally set gas concentration.
Further, in step S3, the pressure of the methane gas filled into the explosion chamber is equal to the atmospheric pressure.
Further, in step S3, after the gas distribution is completed, the chamber should be left standing for more than 5 minutes to make the gas concentration in the chamber uniform.
The invention has the beneficial effects that: by arranging the three sections of transparent pipelines, the middle section of the pipeline is used as an explosion cavity, and the explosion cavity can be simultaneously transmitted to the left direction and the right direction when gas explodes and is closer to the actual scene of gas explosion under a mine; through setting up pressure sensor, flame sensor, data acquisition appearance and high-speed camera, can gather explosion pressure, flame, temperature signal and explosion propagation process's flame image fast, provide scientific data for further revealing gas explosion bidirectional propagation law.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, 1-middle section of pipeline, 2-left section of pipeline, 3-right section of pipeline, 4-high voltage capacitance type discharge controller, 5-ignition rod, 6-pressure sensor, 7-flame sensor, 8-BOPP membrane, 9-vacuum pump, 10-high pressure gas cylinder, 11-digital display pressure gauge, 12-high speed camera, 13-computer, 14-data acquisition instrument.
Detailed Description
The invention is further described in detail below with reference to the drawings and specific embodiments.
As shown in fig. 1, an experimental apparatus for visualizing bidirectional propagation of gas explosion comprises a transparent pipeline, a gas distribution device, an ignition device, and an explosion data acquisition device. The transparent pipeline is made of acrylic materials, and the process of combustible gas explosion can be observed conveniently from the outside in the experiment. Transparent pipeline includes pipeline middle section 1, pipeline left side section 2, pipeline right side section 3, and 2 one ends in the pipeline left side section are opened, and the other end passes through flange fixed connection with pipeline middle section 1, adopts BOPP film 8 sealed in the junction. One end of the right pipeline section 3 is open, the other end of the right pipeline section is fixedly connected with the middle pipeline section 1 through a flange, a BOPP film 8 is adopted at the joint for sealing, the BOPP film is good in transparency, and certain impact strength is achieved. The pipe diameter and the length of the left pipeline section 2 and the right pipeline section 3 are the same, and the center lines of the middle pipeline section 1, the left pipeline section 2 and the right pipeline section 3 coincide. The pipe diameter of the middle section 1 of the pipeline is slightly larger and is used as an explosion cavity. When an explosion experiment is carried out, the impact direction of explosion is the left direction and the right direction, and is closer to the impact direction of gas explosion under a mine.
The gas distribution device comprises a vacuum pump 9 and a high-pressure gas cylinder 10, the vacuum pump 9 is communicated with a pipeline of the pipeline middle section 1, the high-pressure gas cylinder 10 is communicated with a pipeline of the pipeline middle section 1, and combustible gas is filled in the high-pressure gas cylinder 10, wherein the combustible gas in the embodiment is methane. The gas distribution device further comprises a data pressure gauge 11, and the data pressure gauge 11 is installed on the middle section 1 of the pipeline.
Ignition is connected with pipeline middle section 1, and ignition includes high voltage capacitance formula discharge controller 4 and ignition pole 5, and ignition pole 5 is connected with high voltage capacitance formula discharge controller 4 electricity, and inside ignition pole 5 stretched into the pipeline middle section. The firing end of the firing rod 5 is located at the center of the middle section 1 of the pipeline. Wherein the high voltage capacitive discharge controller 4 can regulate the ignition energy. Different ignition energies have certain influence on the gas explosion concentration condition, the explosion power and the like.
The explosion data acquisition device comprises a pressure sensor 6, a flame sensor 7, a data acquisition instrument 14 and a high-speed camera 12, wherein the pressure sensor 6 and the flame sensor 7 are arranged on the pipeline middle section 1, the pipeline left section 2 and the pipeline right section 3, and the pressure sensor 6 and the flame sensor 7 are respectively connected with the data acquisition instrument 14. The high-speed camera 12 is connected with the computer 13 and is used for observing the explosion process of the combustible gas in the transparent pipeline in real time. The pressure sensor 6 can detect the instantaneous explosion pressure data of methane, and the flame sensor 7 can detect the temperature and the brightness when the methane explodes instantaneously.
The experimental device adopts a three-section transparent pipeline, takes the middle section of the pipeline as an explosion cavity, is filled with combustible gas, and explodes through ignition. Parameters during explosion are collected through the pressure sensor 6 and the flame sensor 7, the impact phenomenon at the moment of explosion is captured through the high-speed camera, and effective data support can be provided for gas explosion research under a mine through the experiment simulation.
In addition, the invention also discloses an experimental method for visualizing the bidirectional propagation of gas explosion, which comprises the following steps:
step S1, taking the middle section 1 of the pipeline as an explosion cavity, and sealing two ends of the middle section 1 of the pipeline through a BOPP film to form a closed space. Before the experiment, the air tightness of the explosion cavity needs to be checked.
S2, vacuumizing the explosion cavity to a certain negative pressure by using a vacuum pump, wherein the negative pressure value meets the formula P-P 0 0.1= -X%, where, P 0 For atmospheric pressure, X% is the gas concentration set for the experiment.
And S3, closing a valve between the vacuum pump 9 and the explosion cavity, then closing the vacuum pump 9, opening the high-pressure gas bottle 10, and filling methane gas into the explosion cavity until the pressure of the methane gas filled into the explosion cavity is equal to the atmospheric pressure. After the gas distribution is finished, the chamber is kept stand for more than 5 minutes so as to ensure that the gas concentration in the chamber is uniform. And S4, turning on the data acquisition instrument 14 and the high-speed camera 12, then turning on an ignition device, setting ignition energy and starting an ignition switch.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes which can be made within the knowledge of those skilled in the art without departing from the gist of the present invention are within the scope of the claims of the present invention.
Claims (9)
1. The experimental device for visualization gas explosion bidirectional propagation is characterized by comprising a transparent pipeline, an air distribution device, an ignition device and an explosion data acquisition device, wherein the transparent pipeline comprises a pipeline middle section (1), a pipeline left section (2) and a pipeline right section (3), one end of the pipeline left section (2) is open, the other end of the pipeline left section is fixedly connected with the pipeline middle section (1), and the joint of the pipeline left section and the pipeline right section is sealed by a BOPP film (8); one end of the right pipeline section (3) is open, the other end of the right pipeline section is fixedly connected with the middle pipeline section (1), and a BOPP film (8) is adopted to seal the connection position; the gas distribution device comprises a vacuum pump (9) and a high-pressure gas cylinder (10), the vacuum pump (9) is communicated with the pipeline middle section (1) through a pipeline, the high-pressure gas cylinder (10) is communicated with the pipeline middle section (1) through a pipeline, and combustible gas is filled in the high-pressure gas cylinder (10); the ignition device is connected with the middle pipeline section (1); the explosion data acquisition device comprises a pressure sensor (6), a flame sensor (7), a data acquisition instrument (14) and a high-speed camera (12), wherein the pressure sensor (6) and the flame sensor (7) are respectively arranged on the middle pipeline section (1), the left pipeline section (2) and the right pipeline section (3), and the pressure sensor (6) and the flame sensor (7) are respectively connected with the data acquisition instrument (14); the high-speed camera (12) is connected with the computer (13) and is used for observing the explosion process of the combustible gas in the transparent pipeline in real time.
2. The experimental device for visualizing the bidirectional propagation of gas explosion as in claim 1, wherein the ignition device comprises a high-voltage capacitive discharge controller (4) and an ignition rod (5), the ignition rod (5) is electrically connected with the high-voltage capacitive discharge controller (4), and the ignition rod (5) extends into the middle section of the pipeline.
3. The experimental device for visualizing the bidirectional propagation of gas explosion as in claim 2, wherein the ignition end of the ignition rod (5) is located at the center of the middle pipeline section (1).
4. The experimental device for visualizing the bidirectional propagation of gas explosion as in claim 1, wherein the combustible gas in the high-pressure gas cylinder (10) is methane.
5. The experimental device for visualizing the bidirectional propagation of gas explosion as recited in claim 1, wherein said gas distribution device further comprises a data pressure gauge (11), and said data pressure gauge (11) is installed on said middle pipe section (1).
6. An experimental method for visualizing the bidirectional propagation of gas explosion is characterized by comprising the following steps:
s1, taking the middle section (1) of the pipeline as an explosion cavity, and checking the air tightness of the explosion cavity before an experiment;
s2, vacuumizing the explosion cavity to a certain negative pressure by adopting a vacuum pump;
s3, closing a valve between the vacuum pump (9) and the explosion cavity, then closing the vacuum pump (9), opening the high-pressure gas cylinder (10), and filling methane gas into the explosion cavity;
and S4, turning on the data acquisition instrument (14) and the high-speed camera (12), then turning on an ignition device, setting ignition energy and starting an ignition switch.
7. The experimental method for visualizing the bidirectional propagation of gas explosion as recited in claim 4, wherein in said step S2, the negative pressure value satisfies the formula (P-P) 0 ) 0.1= -X%, in which, P 0 For air pressure, X% is the experimentally set gas concentration.
8. The experimental method for visualizing the bidirectional propagation of gas explosion as recited in claim 4, wherein in step S3, the pressure of the methane gas filled in the explosion chamber is equal to the atmospheric pressure.
9. The experimental method for visualizing the bidirectional propagation of gas explosion as recited in claim 4, wherein in step S3, after the gas distribution is completed, the chamber should be left for more than 5 minutes to make the gas concentration in the chamber uniform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211031828.4A CN115372585A (en) | 2022-08-26 | 2022-08-26 | Visual gas explosion bidirectional propagation experimental device and test method thereof |
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| CN202211031828.4A CN115372585A (en) | 2022-08-26 | 2022-08-26 | Visual gas explosion bidirectional propagation experimental device and test method thereof |
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