CN106706706A - Explosion suppression experimental system and explosion suppression experimental method for gas extraction pipeline coupled by CO2 and vacuum cavity - Google Patents
Explosion suppression experimental system and explosion suppression experimental method for gas extraction pipeline coupled by CO2 and vacuum cavity Download PDFInfo
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- CN106706706A CN106706706A CN201710077282.9A CN201710077282A CN106706706A CN 106706706 A CN106706706 A CN 106706706A CN 201710077282 A CN201710077282 A CN 201710077282A CN 106706706 A CN106706706 A CN 106706706A
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- vacuum chamber
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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
Abstract
The invention discloses an explosion suppression experimental system and explosion suppression experimental method for a gas extraction pipeline coupled by CO2 and a vacuum cavity for researching an explosion suppression effect on the gas extraction pipeline after inert CO2 gas is coupled to the vacuum cavity. When the concentration of CO2 is higher than 22.1%, the chain reaction of gas explosion can be effectively blocked. In order to apply CO2 gas to explosion suppression of the gas extraction pipeline, CO2 is injected into the vacuum cavity; by virtue of a suction action of the vacuum cavity, explosion flames are sucked into the vacuum cavity during gas explosion, and the flames sucked into the cavity are quickly quenched under the action of CO2, and meanwhile, CO2 gas which is high in concentration is replaced to the explosion pipeline to form an inert gas column in front the explosion gas so as to block spread of the explosion flames. According to the experimental device and experimental method disclosed by the invention, fire-extinguishing and pressure-relieving performances of the vacuum cavity after adding carbon dioxide into the vacuum cavity can be conveniently verified, and the relationship among CO2 injection amount, vacuum degree and fire-extinguishing and pressure-relieving performances is experimentally analyzed conveniently.
Description
Technical field
The present invention relates to a kind of CO2The datonation-inhibition experimental system of methane gas extraction pipeline and method coupled with vacuum chamber.It is applied to
Inflammable and explosive coal mine light concentration mash gas extraction pipeline.
Background technology
Domestic at present, coal mining depth is more and more deeper, and mechanization degree is stepped up, and mining rate constantly increases, watt
This outburst amount will be further increased, and Achievements of Gas Control is still the emphasis of prevention and control of mine disaster.The pre- preventing coal mine gas thing of China
Therefore in addition to monitoring, exhaust technology measure, datonation-inhibition, datonation-inhibition technology is also the important hand of effective decrease and control gas blast
Section.From the point of view of domestic coal mine gas from explosion mitigation technology application, coal mine flame-proof explosion suppression device, such as explosion-insulating water tank, water bag, stone-dust barrier
Etc. being used widely, certain effect is played in colliery and the preventing and treating of other industrial explosions.But, such passive type flame proof skill
Art only serves cooling effect to flame, and effect is undesirable, lacks the inhibitory action to field of turbulent flow, takes up room in actual use
Greatly, the uncertainty of action is big, and effective inhibitory action is lacked to the shock wave that blast is produced.It would therefore be desirable to study energy
The enough flame and shock wave for quickly responding gas explosion and being produced to blast can be played effectively suppress and obstruct is made
The new datonation-inhibition technology of gas explosion.
Proposed in patent 200710020127.X by gas pipeline side plus vacuum chamber, ring flange and plane of weakness material come
Suppress combustible substance explosion spreading in pipeline.
The content of the invention
Goal of the invention：For above-mentioned prior art, CO is proposed2The datonation-inhibition experiment system of methane gas extraction pipeline coupled with vacuum chamber
System and method, are easy to study CO2Effectiveness of explosion suppression of the gas to methane gas extraction pipeline.
Technical scheme：A kind of CO2The datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber, including test pipe,
Igniter, vacuum chamber, plane of weakness layer, the first vavuum pump, the second vavuum pump, the first vacuum meter, the second vacuum meter, flame speed are surveyed
Test system and pressure testing system；
The vacuum chamber is arranged on the side of the test pipe, and is connected with the test pipe by ring flange, institute
State plane of weakness layer and be arranged on connectivity part, the vacuum chamber connects CO by valve2Gas bomb；The igniter is arranged on described
One end of test pipe, the firing tip of the igniter is placed in the test pipe, and test pipe is connected with igniter
Place's sealing, the other end of test pipe is sealed with the scraps of paper, and the test pipe is provided with inflatable interface；First vavuum pump and
First vacuum meter connects the vacuum chamber, and second vavuum pump and the second vacuum meter connect the test pipe；The flame
Speed testing system and pressure testing system are arranged at the side of the test pipe, and its sensor arrangement is in the examination
Test on the inwall of pipeline.
Further, also including methane air premixed gas configuration device, the methane air premixed gas configuration dress
Put including the valvular plastics ball air bag of band, the plastics ball air bag connects the inflation on the test pipe by valve
Interface, the plastics ball air bag also connects methane air accumulator and air compressor, the plastics ball air bag by valve
It is provided with methane concentration detection meter.
Further, the test pipe and vacuum chamber are formed by the steel plate that thickness is 1cm.
Further, the plane of weakness layer is polytetrafluoroethylene film.
A kind of CO2The experimental technique of the datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber, comprises the following steps：
(1), test pipe is exhausted and is dehumidified first, then the air-tightness of checkout facility pipeline；
(2), first by methane air accumulator inner high voltage pressure relief of gas to the plastics ball air bag, then the air is controlled
Compressor injects air, the concentration in meter measurement plastics ball air bag is detected by methane concentration, until the plastics ball gas
Intracapsular methane concentration is 10%；
(3) vacuum chamber is vacuumized by first vavuum pump, the reading of the first vacuum meter is observed, works as vacuum
When the negative pressure in chamber (3) reaches vacuum predetermined threshold value A, the connecting valve of the first vavuum pump and vacuum chamber is closed；
(4) CO, is opened2Gas bomb, using the negative pressure of vacuum chamber by CO2Gas is pumped into vacuum chamber, and by adjusting
Section CO2Gas bomb controls to be filled with CO with the aperture of vacuum chamber connecting valve2The amount of gas, until the reading of the first vacuum meter
Valve is completely closed when reaching predetermined threshold value B；
(5) the second vacuum meter reading, is evacuated to test pipe for -0.1MPa, the plastics ball gas is then opened
The connecting valve of capsule and the test pipe, to injecting the methane air mixed gas that prepare in advance in test pipe, until
Untill the second vacuum meter reading back to zero；
(6), before igniting blast, reading, thickness, the CO of plane of weakness layer of the first vacuum meter are recorded2Intake, pass through
Igniter lights the methane air mixed gas in test pipe, completes an explosive test；
(7) after, blast terminates every time, the data of flame speed test system and pressure testing system detection are read, is checked
Whether plane of weakness layer ruptures, and after the plane of weakness material for more renewing, repeat step (1) to (6).
Further, in the step, when being vacuumized to vacuum chamber, the value of predetermined threshold value A for -0.1~-
0.01MPa。
Further, in the step (4), the value of predetermined threshold value B is -0.09~0MPa.
Further, not in homogeneous process of the test, CO in the step (4)2Intake is adjusted in the range of -0.09~0MPa
Whole, adjustment spacing value is 0.01MPa；Not in homogeneous process of the test, plane of weakness material thickness adjusting range is 0.15~0.3mm, is adjusted
Whole spacing value is 0.01mm.
Beneficial effect：CO is used in order to study2Datonation-inhibition fire extinguishing, pressure release effect are coupled with vacuum chamber, the present invention is proposed
A kind of CO2The datonation-inhibition experimental system of methane gas extraction pipeline and method coupled with vacuum chamber.CO2It is that a kind of blast to methane gas has
There is the inert gas of fine inhibitory action, the chain reaction of gas explosion can be effectively blocked, as CO in mixed gas2Concentration
During more than 22.1%, the UEL of gas overlaps with lower limit, and mixed gas will not occur gas explosion.Vacuum chamber is a kind of
Cavity with certain vacuum degree, under the prodromal blast wave effect that gas explodes in the pipeline, the plane of weakness material of vacuum chamber
Can automatically rupture rapidly, by explosive flame suction chamber, produce swabbing action.CO2Datonation-inhibition technology is coupled with vacuum chamber, effectively
Using the swabbing action of vacuum chamber, by CO2Gas apply to methane gas extraction pipeline it is datonation-inhibition in.Experimental system of the invention and side
Method can be easy to prove fire extinguishing, the raising of relieving characteristics of vacuum chamber after addition carbon dioxide in vacuum chamber, and be easy to experiment point
Analysis vacuum chamber CO2The relation of injection rate, vacuum and extinguishing property.
Brief description of the drawings
Fig. 1 is gas explosion flame capture explosion suppression device experimental system figure.
Specific embodiment
The present invention is done below in conjunction with the accompanying drawings further is explained.
As shown in figure 1, a kind of CO2The datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber, including test pipe
1st, igniter 2, vacuum chamber 3, plane of weakness layer the 4, first vavuum pump 5, the second vavuum pump 6, the first vacuum meter 7, the second vacuum meter 8,
Flame speed test system 9, pressure testing system 10 and methane air premixed gas configuration device.
Wherein, by thickness for the steel plate of 1cm is formed, vacuum chamber 3 is arranged on test pipe 1 for test pipe 1 and vacuum chamber 3
Side, and connected with test pipe 1 by ring flange；Plane of weakness layer 4 is arranged on connectivity part, and plane of weakness layer 4 is that polytetrafluoroethylene (PTFE) is thin
Film；Vacuum chamber 3 connects CO by valve2Gas bomb.Vacuum chamber is a kind of cavity with certain vacuum degree, and it has to flame
Certain extinguishing effect, meanwhile, can preferably reduce the superpressure produced by blast.
Igniter 2 is arranged on one end of test pipe 1, and the firing tip of igniter 2 is placed in test pipe 1, experiment
Pipeline 1 is sealed with the junction of igniter 2, and the other end of test pipe is sealed with the scraps of paper for scribbling vaseline, prevents blast
Gas escape is in air.Test pipe 1 is provided with inflatable interface.First vavuum pump 5 and the connection vacuum chamber 3 of the first vacuum meter 7,
Second vavuum pump 6 and the joint test pipeline 1 of the second vacuum meter 8.Flame speed test system 9 and pressure testing system 10 are equal
The side of test pipe 1 is arranged on, its sensor arrangement is on the inwall of test pipe 1.
Methane air premixed gas configuration device is included with valvular plastics ball air bag.Plastics ball air bag passes through
Inflatable interface on valve joint test pipeline 1, plastics ball air bag also by other valve connect methane air accumulator and
Air compressor, plastics ball air bag is provided with methane concentration detection meter.
In the present embodiment, vavuum pump model ZK70 is mainly used in vacuumizing in pipeline and vacuum chamber；Vacuum is calculated as vacuum
Pressure gauge, range is -0.10MPa；Flame speed test system 9 is sensed using the three wave band infra red flames of model A710/IR3
Device；Pressure testing system 10 uses the pressure sensor of model MPX53；Igniter is located at pipeline head end, for by pipeline
Interior gas is lighted, so as to simulate the gas explosion reaction in pipeline.
Such as above-mentioned CO2The experimental technique of the datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber, including following step
Suddenly：
(1), the airtight test of test pipe and vacuum chamber.Pipeline is exhausted and is dehumidified first before experiment, with
Test pipe 1 is dry before guarantee is filled with methane air premixed gas, and waste gas is drained.Then checkout facility pipeline 1
Air-tightness, can select to be filled with air in the pipeline to closed at both ends, pipeline inner pressure is risen to 0.2MPa, observe vacuum pressure
The reading of table, if pressure vacuum gauge stable reading is in 0.2MPa, shows that air-tightness is good in pipeline, if under pressure gauge reading
Drop is very fast, then along test pipe inspection.
(2), distribution.First by methane air accumulator inner high voltage pressure relief of gas to plastics ball air bag, then control air pressure
Contracting machine injects air, the concentration in meter measurement plastics ball air bag is detected by methane concentration, until first in plastics ball air bag
Alkane concentration is 10%.Every time as far as possible with full whole plastics ball air bag, repeatedly to be had, in the pipeline without vacuum chamber with dense
The comparing of degree gas explosion experiment.
(3), vacuumized in vacuum chamber.Vacuum chamber is installed in the flank of test pipe 1 and the method for polytetrafluoroethylene film is embedded with
Blue disk, is then vacuumized by the first vavuum pump 5 to vacuum chamber 3, the reading of the first vacuum meter 7 is observed, when vacuum chamber 3
When negative pressure reaches vacuum predetermined threshold value A, the connecting valve of the first vavuum pump 5 and vacuum chamber 3 is closed.Wherein, predetermined threshold value A
Value is -0.1~-0.01MPa.
(4), it is filled with CO in vacuum chamber2Gas.Open CO2Gas bomb, using the negative pressure of vacuum chamber by CO2Gas is pumped into
Vacuum chamber, in 3, and by adjusting CO2Gas bomb controls to be filled with CO with the aperture of the connecting valve of vacuum chamber 32The amount of gas,
Until the reading of the first vacuum meter 7 completely closes valve when reaching predetermined threshold value B.Wherein, the value of predetermined threshold value B is -0.09
~0MPa.Not in homogeneous process of the test, CO2Spacing value is sequentially adjusted in for 0.01MPa.
(5), it is filled with explosion gas in test pipe 1.Test pipe 1 is evacuated to the reading of the second vacuum meter 8 for-
0.1MPa, then opens the connecting valve of plastics ball air bag and the test pipe, is prepared in advance to being injected in test pipe
Good methane air mixed gas, untill the reading back to zero of the second vacuum meter 8.It is now certain density in test pipe 1
Methane air mixed gas, medium is in certain vacuum in vacuum chamber.
(6), before igniting blast, the first vacuum meter, 7 reading, thickness, the CO of plane of weakness layer 4 are recorded2Intake,
The methane air mixed gas in test pipe 1 are lighted by igniter 2, an explosive test is completed.CO2Intake
Weighed in the form of vacuum pressure, for example, vacuum chamber is vacuumized into -0.09MPa in step (3), then lead to CO2To vacuum chamber
When pressure is -0.06MPa, the CO being passed through2Measure as -0.03MPa.
(7) after, blast terminates every time, flame speed test system is read by single-chip microcomputer or PLC system, 9 and pressure are surveyed
The data of the detection of test system 10, then check whether plane of weakness layer ruptures and analyze datonation-inhibition extinguishing effect, and are more renewing
After plane of weakness material, repeat step (1) to (6).Wherein, not in homogeneous process of the test, plane of weakness material thickness adjusting range is
0.15~0.3mm, adjustment spacing value is 0.01mm.
The present invention uses vacuum chamber and CO2Coupling is datonation-inhibition, while having annexed swabbing action fire extinguishing and the CO of vacuum chamber2Asphyxia
Two kinds of advantages of fire extinguishing are acted on, and by experimental verification, after showing to add carbon dioxide in chamber, the fire extinguishing of vacuum chamber can be improved
Performance.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of CO2The datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber, it is characterised in that：Including test pipe
(1), igniter (2), vacuum chamber (3), plane of weakness layer (4), the first vavuum pump (5), the second vavuum pump (6), the first vacuum meter
(7), the second vacuum meter (8), flame speed test system (9) and pressure testing system (10)；
The vacuum chamber (3) is arranged on the side of the test pipe (1), and by ring flange with the test pipe (1) even
Logical, plane of weakness layer (4) is arranged on connectivity part, and the vacuum chamber (3) connects CO by valve2Gas bomb；The igniting dress
One end that (2) are arranged on the test pipe (1) is put, the firing tip of the igniter (2) is placed in the test pipe (1)
Interior, test pipe (1) is sealed with igniter (2) junction, and the other end of test pipe is sealed with the scraps of paper, the test pipe
(1) it is provided with inflatable interface；First vavuum pump (5) and the first vacuum meter (7) connect the vacuum chamber (3), described second
Vavuum pump (6) and the second vacuum meter (8) connect the test pipe (1)；The flame speed test system (9) and pressure
Test system (10) is arranged at the side of the test pipe (1), inwall of its sensor arrangement in the test pipe (1)
On.
2. CO according to claim 12The datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber, it is characterised in that：
Also include methane air premixed gas configuration device, the methane air premixed gas configuration device is included with valvular ball
Shape plastic gas bag, the plastics ball air bag connects the inflatable interface on the test pipe (1), the spherical modeling by valve
Material air bag also connects methane air accumulator and air compressor by valve, and the plastics ball air bag is provided with methane concentration inspection
Survey meter.
3. CO according to claim 1 and 22The datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber, its feature exists
In：The test pipe (1) and vacuum chamber (3) are by thickness for the steel plate of 1cm is formed.
4. CO according to claim 1 and 22The datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber, its feature exists
In：Plane of weakness layer (4) is polytetrafluoroethylene film.
5. according to any described CO of claim 1-42The experiment of the datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber
Method, it is characterised in that comprise the following steps：
(1), test pipe (1) is exhausted and is dehumidified first, then the air-tightness of checkout facility pipeline (1)；
(2), first by methane air accumulator inner high voltage pressure relief of gas to the plastics ball air bag, then the air is controlled to compress
Machine injects air, the concentration in meter measurement plastics ball air bag is detected by methane concentration, until in the plastics ball air bag
Methane concentration is 10%；
(3) vacuum chamber (3) is vacuumized by first vavuum pump (5), the reading of the first vacuum meter of observation (7), when
When the negative pressure of vacuum chamber (3) reaches vacuum predetermined threshold value A, the connecting valve of the first vavuum pump (5) and vacuum chamber (3) is closed；
(4) CO, is opened2Gas bomb, using the negative pressure of vacuum chamber by CO2Gas is pumped into vacuum chamber (3), and by adjusting
Section CO2Gas bomb controls to be filled with CO with the aperture of vacuum chamber (3) connecting valve2The amount of gas, until the first vacuum meter (7)
Reading completely close valve when reaching predetermined threshold value B；
(5) the second vacuum meter (8) reading, is evacuated to test pipe (1) for -0.1MPa, the plastics ball is then opened
The connecting valve of air bag and the test pipe, to the methane air mixed gas that prepare in advance are injected in test pipe, directly
To the second vacuum meter (8) reading back to zero；
(6), before igniting blast, reading, thickness, the CO of plane of weakness layer (4) of the first vacuum meter (7) are recorded2Intake, lead to
The methane air mixed gas that igniter (2) is lighted in test pipe (1) are crossed, an explosive test is completed；
(7) after, blast terminates every time, the data of flame speed test system (9) and pressure testing system (10) detection, inspection are read
Look into whether plane of weakness layer ruptures, and after the plane of weakness material for more renewing, repeat step (1) to (6).
6. CO according to claim 52The experimental technique of the datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber,
It is characterized in that：In the step (3), when being vacuumized to vacuum chamber (3), the value of predetermined threshold value A for -0.1~-
0.01MPa。
7. CO according to claim 52The experimental technique of the datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber,
It is characterized in that：In the step (4), the value of predetermined threshold value B is -0.09~0MPa.
8. CO according to claim 72The experimental technique of the datonation-inhibition experimental system of methane gas extraction pipeline coupled with vacuum chamber,
It is characterized in that：Not in homogeneous process of the test, CO in the step (4)2Intake is adjusted in the range of -0.09~0MPa, is adjusted
Whole spacing value is 0.01MPa；Not in homogeneous process of the test, plane of weakness material thickness adjusting range is 0.15~0.3mm, adjustment interval
It is 0.01mm to be worth.
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| CN107796645A (en) * | 2017-10-20 | 2018-03-13 | 安徽理工大学 | A kind of method of testing of cavity body structure to Gas Detonation wave absorption effect |
| CN107941853A (en) * | 2017-08-30 | 2018-04-20 | 如皋市双亚环保科技有限公司 | A kind of high strength alloy steel welding gas testing systems |
| CN109493674A (en) * | 2018-12-21 | 2019-03-19 | 黑龙江科技大学 | A kind of simulation gas explosion effect Modern teaching device and its control method |
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| CN107796645A (en) * | 2017-10-20 | 2018-03-13 | 安徽理工大学 | A kind of method of testing of cavity body structure to Gas Detonation wave absorption effect |
| CN107796645B (en) * | 2017-10-20 | 2020-07-21 | 安徽理工大学 | Method for testing gas detonation wave-absorbing effect of cavity structure |
| CN107605527B (en) * | 2017-10-20 | 2021-03-26 | 安徽理工大学 | Test system for inhibiting gas explosion under coal mine by cavity structure |
| CN107725099A (en) * | 2017-11-23 | 2018-02-23 | 黑龙江科技大学 | A kind of datonation-inhibition explosion isolation device of active noble gas foam metal |
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| CN109493674A (en) * | 2018-12-21 | 2019-03-19 | 黑龙江科技大学 | A kind of simulation gas explosion effect Modern teaching device and its control method |
| CN109493674B (en) * | 2018-12-21 | 2021-07-16 | 黑龙江科技大学 | Modern teaching device for simulating gas explosion effect and control method thereof |
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Application publication date: 20170524 |
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