CN107860790A - A kind of coal mine gas from explosion shock wave acceleration mechanism test method - Google Patents
A kind of coal mine gas from explosion shock wave acceleration mechanism test method Download PDFInfo
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- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
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Abstract
The invention discloses a kind of coal mine gas from explosion shock wave acceleration mechanism test method.It carries out shock wave accelerated test by the way that pipeline, ring flange, bolt and nut, pressure sensor, flame sensor, exhaust outlet, electrode, AC power, vavuum pump, digital vacuum meter, high-purity methane gas cylinder, air compressor machine, circulating pump, pressure valve, inlet valve, intake valve, first circulation valve, second circulation valve, dynamic data acquisition, host computer, obstacle piece, diaphragm and steel disc are built into pilot system；2~5 obstacle pieces are wherein set in premix accelerating sections, 2 pressure sensors that spacing is 3~10cm and 2 flame sensors that spacing is 3~10cm are set between every two obstacles piece.The present invention can study coal mine gas from explosion impact and the impact enhancing acceleration mechanism after various barrier and multi-obstacle avoidance superpositions is run into communication process, for the research gas explosion mechanism of transmission and its suppress to provide support.
Description
Technical field
The present invention relates to a kind of coal mine gas from explosion study mechanism method, is impacted more particularly, to a kind of coal mine gas from explosion
Ripple acceleration mechanism test method.
Background technology
As one of main Coal Mine Disasters, it is to be discharged in very short time in a large amount of progress of coal mining for gas explosion
The methane gas enrichment come, reaches explosion limit 5%~16%, runs into burning things which may cause a fire disaster formation HTHP shock wave and outwards propagates, and
With the huge sound, serious destruction is caused to tunnel, supporting, apparatus, and causes substantial amounts of casualties.Gas explosion
The shock wave and flame characteristics of formation are the principal elements for determining gas explosion accident destructiveness.At present, the colliery in China
95% is pit mining, and in State owned coal mine at 724, highly gassy mine occupies at 152, accounting 21%, according to statistics, is founded the state
Since colliery death toll more than 100 people disaster accident statistical form, because death toll accounts for 82% caused by gas explosion.
It is exactly severe and great casualty that why gas explosion accident one, which occurs, why can cause so big underground facilities and equipment loss with
Casualties.Therefore, carry out gas explosion has important value in the propagating accelerated characteristic research of underground coal mine, it is quick-fried for research gas
It is fried to cause calamity mechanism and further suppression gas explosion Communication Research significant.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of coal mine gas from explosion shock wave acceleration mechanism test method,
The impact enhancing that coal mine gas from explosion impact is run into communication process after various barrier and multi-obstacle avoidance superpositions can be studied to add
Fast mechanism.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of coal mine gas from explosion shock wave acceleration mechanism test method, it includes
(1) by pipeline, ring flange, bolt and nut, pressure sensor, flame sensor, exhaust outlet, electrode, AC power,
Vavuum pump, digital vacuum meter, high-purity methane gas cylinder, air compressor machine, circulating pump, pressure valve, inlet valve, intake valve, first circulation valve,
Second circulation valve, dynamic data acquisition, host computer, obstacle piece, diaphragm and steel disc connect into pilot system；
Wherein, pilot system is divided into premix accelerating sections and impact propagation segment two parts by the diaphragm, and diaphragm is poly- second
Alkene material, diaphragm thickness are 0.5~2mm, and diaphragm diameter is bigger 1~3cm than pipe diameter；The electrode is two metal bars, one
End connection AC power, other end connection fuse；The AC power is 24~48V alternating currents；
(2) pressure valve and air compressor machine are successively opened in order, keep inlet valve, intake valve, first circulation valve and second to follow
The closed mode of ring valve, the air-tightness of premix accelerating sections is checked, after it is determined that premix accelerating sections is air tight, successively closed in order
Air compressor machine and pressure valve；
(3) digital vacuum meter and inlet valve are opened, keeps pressure valve, intake valve, first circulation valve and second circulation valve
Closed mode, open vavuum pump and premix accelerating sections is vacuumized；Vavuum pump is closed after reaching experiment and needing vacuum, is opened
Open intake valve and high-purity methane gas cylinder carries out methane gas dispatching, after volume fraction methane gas needed for experiment, by suitable
Sequence successively closes high-purity methane gas cylinder and intake valve；
(4) after first circulation valve and second circulation valve is opened, open the circulation pump is to methane and air in premix accelerating sections
Carry out premix stirring, circulating pump closed after 10~20min of pump work is circulated, after turn off first circulation valve and second circulation
Valve；After checking that mixed gas is in atmospheric pressure in premix accelerating sections, inlet valve and digital vacuum meter are closed；
(5) dynamic data acquisition is opened, data acquisition software is opened in host computer, pressure sensor and flame are set
The trigger parameter of sensor, and be in dynamic data acquisition and gather state to be triggered；
(6) closed mode of pressure valve, inlet valve, intake valve, first circulation valve, second circulation valve and exhaust outlet is kept,
Open AC power to light a fire to electrode, exploded at electrode, explosion wave enters one by obstacle piece turbulization
Step enhancing, is propagated after diaphragm is broken through along impact propagation segment, is during which triggered dynamic data acquisition and is carried out pressure signal and flame
Signal acquisition；Host computer preserves the pressure sensor of each position and the data message of flame sensor collection in pipeline；
(7) exhaust outlet is opened, the closed mode of inlet valve, intake valve, first circulation valve and second circulation valve is kept, by suitable
Sequence successively opens pressure valve and air compressor machine, to carrying out malleation purging into premix accelerating sections and impact propagation segment, removes internal waste gas,
Air compressor machine, pressure valve and exhaust outlet are successively closed after 20~30min in order；
(8) all power supplys are cut off, or are tested next time by (2)~(7) after changing the fuse between diaphragm and electrode；
(9) analyzed and handled by the pressure data information to being preserved in host computer and flame data message, found
Pressure signal and flare up fire are propagated in the enhancing rule by different obstacle pieces and pressure signal and flare up fire in impact
The changing rule of section.
Further, the obstacle piece is formed by welding square iron plate in annulus iron pan, can carry out different barrier conditions
Lower explosion wave accelerating performance, wherein annulus iron pan diameter are equal to pipe diameter, annulus iron pan be provided with it is right on ring flange
The bolt hole answered；And obstacle piece sets 2~5 in premix accelerating sections, and two pressure sensors are set between every two obstacles piece
With two flame sensors, and distance distance between 3~10cm, this two flame sensors between this two pressure sensors
For 3~10cm, the time that this two pressure sensors are so passed through by the distance between two pressure sensors and shock wave
The ratio between difference can calculate shock motion speed, can similarly calculate flame propagation velocity.
Further, the methane purity in the high-purity methane gas cylinder is more than or equal to 99.99%, for accurate blast primary condition
Foundation is provided.
The beneficial effects of the invention are as follows：The invention provides a kind of simple efficient gas explosion pilot system and development watt
This explosion wave further enhances the test method of acceleration in communication process；By setting different barriers and different obstacles
Thing stack combinations, it can study after coal mine gas from explosion impact runs into the superposition of various barriers and multi-obstacle avoidance in communication process
Impact enhancing acceleration mechanism.
Brief description of the drawings
Fig. 1 is the test system architecture schematic diagram of the present invention.
Fig. 2 is the schematic diagram of several forms of obstacle piece.
Fig. 3 is diaphragm and steel disc schematic diagram.
Wherein：1- pipelines；2- ring flanges；3- bolt and nuts；4- pressure sensors；5- flame sensors；6- exhaust outlets；7-
Electrode；8- AC powers；9- vavuum pumps；10- numeral vacuum meters；11- high-purity methane gas cylinders；12- air compressor machines；13- circulating pumps；
14- pressure valves；15- inlet valves；16- intake valves；17- first circulation valves；18- second circulation valves；19- dynamic data acquisitions；
20- host computers；21- obstacle pieces；22- diaphragms；23- steel discs.
Embodiment
The present invention is further elaborated with reference to the accompanying drawings and examples.
As embodiment, a kind of coal mine gas from explosion shock wave acceleration mechanism test method, its specific steps include：
(1) as shown in figure 1, by pipeline 1, ring flange 2, bolt and nut 3, pressure sensor 4, flame sensor 5, exhaust outlet
6th, electrode 7, AC power 8, vavuum pump 9, digital vacuum meter 10, high-purity methane gas cylinder 11, air compressor machine 12, circulating pump 13, calm the anger
Valve 14, inlet valve 15, intake valve 16, first circulation valve 17, second circulation valve 18, dynamic data acquisition 19, host computer 20, barrier
Piece 21, diaphragm 22 and steel disc 23 is hindered to connect into pilot system；
Wherein, pilot system is divided into premix accelerating sections and impact propagation segment two parts by diaphragm 22, and diaphragm 22 is poly- second
Alkene material, the thickness of diaphragm 22 are 0.5~2mm, and the diameter of diaphragm 22 is bigger 1~3cm than the diameter of pipeline 1, as shown in Figure 3；Electrode 7 is two
Root metal bar, one end connection AC power 8, other end connection fuse；AC power 8 is 24~48V alternating currents, is provided for fuse
Ignition energy；Methane purity in high-purity methane gas cylinder 11 is more than or equal to 99.99%, and foundation is provided for accurate blast primary condition；
Obstacle piece 21 is formed by welding square iron plate in annulus iron pan and (is illustrated in figure 2 several forms of obstacle piece 21, i.e., in difference
Position welding different shape size square iron plate or its combination, such as 211,212,213 and 214), different barriers can be carried out
Under the conditions of explosion wave accelerating performance, wherein annulus iron pan diameter is equal to the diameter of pipeline 1, and annulus iron pan is provided with and ring flange
Corresponding bolt hole on 2；And obstacle piece 21 sets 2~5 in premix accelerating sections, and two pressures are set between every two obstacles piece 21
Force snesor 4 and two flame sensors 5, and distance is 3~10cm between this two pressure sensors 4, this two flames pass
Distance is 3~10cm between sensor 5, so passes through this two pressures by the distance between two pressure sensors 4 and shock wave
The ratio between time difference of force snesor 4 can calculate shock motion speed, can similarly calculate flame propagation velocity；
(2) pressure valve 14 and air compressor machine 12 are successively opened in order, keep inlet valve 15, intake valve 16, first circulation valve
17 and the closed mode of second circulation valve 18, the air-tightness of premix accelerating sections is checked, after it is determined that premix accelerating sections is air tight, is pressed
Order successively closes air compressor machine 12 and pressure valve 14；
(3) digital vacuum meter 10 and inlet valve 15 are opened, keeps pressure valve 14, intake valve 16, first circulation valve 17 and the
The closed mode of two circulating valves 18, open vavuum pump 9 and premix accelerating sections is vacuumized；After reaching experiment and needing vacuum
Vavuum pump 9 is closed, intake valve 16 is opened and high-purity methane gas cylinder 11 carries out methane gas dispatching, to be charged into volume integral needed for experiment
After number methane gas, high-purity methane gas cylinder 11 and intake valve 16 are successively closed in order；
(4) after first circulation valve 17 and second circulation valve 18 is opened, open the circulation pump 13 is to methane in premix accelerating sections
Carry out premix stirring with air, circulating pump 13 work 10~20min after close circulating pump 13, after turn off first circulation valve 17
With second circulation valve 18；After checking that mixed gas is in atmospheric pressure in premix accelerating sections, inlet valve 15 and digital vacuum are closed
Table 10；
(5) dynamic data acquisition 19 is opened, data acquisition software is opened in host computer 20, pressure sensor 4 is set
With the trigger parameter of flame sensor 5, and it is in dynamic data acquisition 19 and gathers state to be triggered；
(6) pressure valve 14, inlet valve 15, intake valve 16, first circulation valve 17, second circulation valve 18 and exhaust outlet 6 are kept
Closed mode, open AC power 8 electrode 7 is lighted a fire, exploded at electrode 7, explosion wave passes through obstacle
The turbulization of piece 21 further enhances, and is propagated after diaphragm 22 is broken through along impact propagation segment, during which triggers dynamic data acquisition
19 carry out pressure signal and flare up fire collection；Host computer 20 preserves the pressure sensor 4 of each position and flame sensing in pipeline
The data message that device 5 gathers；
(7) exhaust outlet 6 is opened, keeps the closing of inlet valve 15, intake valve 16, first circulation valve 17 and second circulation valve 18
State, pressure valve 14 and air compressor machine 12 are successively opened in order, to carrying out malleation purging into premix accelerating sections and impact propagation segment,
Internal waste gas are removed, air compressor machine 12, pressure valve 144 and exhaust outlet 6 are successively closed in order after 20~30min；
(8) all power supplys are cut off, or are tried next time by (2)~(7) after changing the fuse between diaphragm 22 and electrode 7
Test；
(9) by the way that the pressure data information and flame data message that are preserved in host computer 20 are analyzed and handled, look for
Impacted to pressure signal and flare up fire in the enhancing rule by different obstacle pieces 21 and pressure signal and flare up fire
The changing rule of propagation segment.
As the supplement of above-described embodiment, it is experiment of remaining silent that steel disc 23 (as shown in Figure 3), which is installed on carry out on official road, steel
Piece 23 can also be removed, and carry out blast impulse wave propagation test under the conditions of opening.
Finally it should be noted that described above is only technical scheme, rather than its protection domain is made any
Limitation, every related amendments or equivalents carried out according to technical solution of the present invention, the still protection in technical solution of the present invention
In the range of.
Claims (3)
1. a kind of coal mine gas from explosion shock wave acceleration mechanism test method, it is characterised in that this method includes
(1) by pipeline, ring flange, bolt and nut, pressure sensor, flame sensor, exhaust outlet, electrode, AC power, vacuum
Pump, digital vacuum meter, high-purity methane gas cylinder, air compressor machine, circulating pump, pressure valve, inlet valve, intake valve, first circulation valve, second
Circulating valve, dynamic data acquisition, host computer, obstacle piece, diaphragm and steel disc connect into pilot system；
Wherein, pilot system is divided into premix accelerating sections and impact propagation segment two parts by the diaphragm, and diaphragm is polyethylene material
Material, diaphragm thickness is 0.5~2mm, and diaphragm diameter is bigger 1~3cm than pipe diameter；The electrode is two metal bars, and one end connects
Connect AC power, other end connection fuse；The AC power is 24~48V alternating currents；
(2) pressure valve and air compressor machine are successively opened in order, keep inlet valve, intake valve, first circulation valve and second circulation valve
Closed mode, check premix accelerating sections air-tightness, it is determined that premix accelerating sections it is air tight after, in order successively close pneumatics
Machine and pressure valve；
(3) digital vacuum meter and inlet valve are opened, keeps the closing of pressure valve, intake valve, first circulation valve and second circulation valve
State, open vavuum pump and premix accelerating sections is vacuumized；Close vavuum pump after reaching experiment and needing vacuum, open into
Air valve and high-purity methane gas cylinder carry out methane gas dispatching, after volume fraction methane gas needed for experiment, in order first
High-purity methane gas cylinder and intake valve are closed afterwards；
(4) after first circulation valve and second circulation valve is opened, open the circulation pump is carried out to methane in premix accelerating sections and air
Premix stirring, close circulating pump after 10~20min of pump work is circulated, after turn off first circulation valve and second circulation valve；
After checking that mixed gas is in atmospheric pressure in premix accelerating sections, inlet valve and digital vacuum meter are closed；
(5) dynamic data acquisition is opened, data acquisition software is opened in host computer, pressure sensor and flame sensing are set
The trigger parameter of device, and be in dynamic data acquisition and gather state to be triggered；
(6) closed mode of pressure valve, inlet valve, intake valve, first circulation valve, second circulation valve and exhaust outlet is kept, is opened
AC power is lighted a fire to electrode, is exploded at electrode, and explosion wave further increases by obstacle piece turbulization
By force, propagated after diaphragm is broken through along impact propagation segment, during which trigger dynamic data acquisition and carry out pressure signal and flare up fire
Collection；Host computer preserves the pressure sensor of each position and the data message of flame sensor collection in pipeline；
(7) exhaust outlet is opened, keeps the closed mode of inlet valve, intake valve, first circulation valve and second circulation valve, in order first
Pressure valve and air compressor machine are opened afterwards, to carrying out malleation purging into premix accelerating sections and impact propagation segment, remove internal waste gas, 20~
Air compressor machine, pressure valve and exhaust outlet are successively closed after 30min in order；
(8) all power supplys are cut off, or are tested next time by (2)~(7) after changing the fuse between diaphragm and electrode；
(9) analyzed and handled by the pressure data information to being preserved in host computer and flame data message, find pressure
Signal and flare up fire are impacting propagation segment in the enhancing rule by different obstacle pieces and pressure signal and flare up fire
Changing rule.
A kind of 2. coal mine gas from explosion shock wave acceleration mechanism test method according to claim 1, it is characterised in that institute
State obstacle piece to be formed by welding square iron plate in annulus iron pan, annulus iron pan diameter is equal to pipe diameter, sets on annulus iron pan
There is bolt hole corresponding with ring flange；And obstacle piece sets 2~5 in premix accelerating sections, is set between every two obstacles piece
Two pressure sensors and two flame sensors, and distance is 3~10cm, this two flames between this two pressure sensors
Distance is 3~10cm between sensor.
A kind of 3. coal mine gas from explosion shock wave acceleration mechanism test method according to claim 1, it is characterised in that institute
The methane purity stated in high-purity methane gas cylinder is more than or equal to 99.99%.
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| CN108535446A (en) * | 2018-04-19 | 2018-09-14 | 河南工程学院 | Pipeline gas explosion causes the experimental provision and method that deposit coal dust subsequent explosion |
| CN108896358A (en) * | 2018-09-26 | 2018-11-27 | 中煤科工集团重庆研究院有限公司 | A kind of experiment explosion gas acquisition device based on pressure signal detection |
| CN109162704A (en) * | 2018-10-16 | 2019-01-08 | 中国矿业大学(北京) | The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas |
| CN109374679A (en) * | 2018-10-24 | 2019-02-22 | 南京理工大学 | A kind of measuring device of Mixed Gases Explosion pressure and speed |
| CN109975358A (en) * | 2019-04-26 | 2019-07-05 | 中国矿业大学(北京) | A kind of experimental system and method for half open space gases explosion |
| CN110568015A (en) * | 2019-08-02 | 2019-12-13 | 安徽理工大学 | Gas explosion characteristic parameter testing device |
| CN111916236A (en) * | 2020-07-15 | 2020-11-10 | 中国核动力研究设计院 | Modular hydrogen explosion experiment research system and method with circulation loop |
| WO2021057859A1 (en) * | 2019-09-27 | 2021-04-01 | 中国石油大学(华东) | Experimental method and system based on research of jet fire of long-distance natural gas pipeline under obstacle placement condition |
| CN113325034A (en) * | 2021-07-08 | 2021-08-31 | 安徽理工大学 | Test system and test method for coal mine gas and coal dust explosion |
| CN114414626A (en) * | 2022-01-21 | 2022-04-29 | 安徽理工大学 | Combustible gas detonation drive generator for high-speed loading |
| CN114935641A (en) * | 2022-05-25 | 2022-08-23 | 中煤科工集团重庆研究院有限公司 | Device and method for testing gas explosion pressure in explosion-proof cavity |
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| CN108535446B (en) * | 2018-04-19 | 2023-08-22 | 河南工程学院 | Experimental device and method for secondary explosion of deposited coal dust caused by gas explosion of pipeline |
| CN108535446A (en) * | 2018-04-19 | 2018-09-14 | 河南工程学院 | Pipeline gas explosion causes the experimental provision and method that deposit coal dust subsequent explosion |
| CN108896358A (en) * | 2018-09-26 | 2018-11-27 | 中煤科工集团重庆研究院有限公司 | A kind of experiment explosion gas acquisition device based on pressure signal detection |
| CN109162704A (en) * | 2018-10-16 | 2019-01-08 | 中国矿业大学(北京) | The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas |
| CN109374679A (en) * | 2018-10-24 | 2019-02-22 | 南京理工大学 | A kind of measuring device of Mixed Gases Explosion pressure and speed |
| CN109975358A (en) * | 2019-04-26 | 2019-07-05 | 中国矿业大学(北京) | A kind of experimental system and method for half open space gases explosion |
| CN110568015A (en) * | 2019-08-02 | 2019-12-13 | 安徽理工大学 | Gas explosion characteristic parameter testing device |
| WO2021057859A1 (en) * | 2019-09-27 | 2021-04-01 | 中国石油大学(华东) | Experimental method and system based on research of jet fire of long-distance natural gas pipeline under obstacle placement condition |
| CN111916236A (en) * | 2020-07-15 | 2020-11-10 | 中国核动力研究设计院 | Modular hydrogen explosion experiment research system and method with circulation loop |
| CN113325034B (en) * | 2021-07-08 | 2023-06-23 | 安徽理工大学 | Test system and test method for coal mine gas and coal dust explosion |
| CN113325034A (en) * | 2021-07-08 | 2021-08-31 | 安徽理工大学 | Test system and test method for coal mine gas and coal dust explosion |
| CN114414626A (en) * | 2022-01-21 | 2022-04-29 | 安徽理工大学 | Combustible gas detonation drive generator for high-speed loading |
| CN114414626B (en) * | 2022-01-21 | 2023-11-03 | 安徽理工大学 | Combustible gas detonation drive generator for high-speed loading |
| CN114935641A (en) * | 2022-05-25 | 2022-08-23 | 中煤科工集团重庆研究院有限公司 | Device and method for testing gas explosion pressure in explosion-proof cavity |
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