CN107907466A - It is a kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure - Google Patents
It is a kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure Download PDFInfo
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- CN107907466A CN107907466A CN201711249856.2A CN201711249856A CN107907466A CN 107907466 A CN107907466 A CN 107907466A CN 201711249856 A CN201711249856 A CN 201711249856A CN 107907466 A CN107907466 A CN 107907466A
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- 230000008859 change Effects 0.000 title claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 28
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 239000003245 coal Substances 0.000 abstract description 24
- 230000035699 permeability Effects 0.000 abstract description 8
- 238000005065 mining Methods 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
Change gas humidity and three axis seepage apparatus of port of export positive pressure the invention discloses a kind of, it includes triaxial pressure system, and gas supply system is connected with triaxial pressure system inlet end by pipeline；The outlet side of triaxial pressure system is connected with positive pressure regulating system by pipeline, and positive pressure regulating system is connected with flow measuring systems by pipeline；Pressure-loaded system is connected with triaxial pressure system；Vacuum degassing system is connected between positive pressure regulating system and flow measuring systems by pipeline；The three axis seepage apparatus for solving the prior art cannot change gas humidity, it is impossible to simulate the technical problems such as influence of the change of coal mining gas on-site humidity to coal permeability.
Description
Technical field
The invention belongs to experimental apparatus technical field, more particularly to a kind of change gas humidity and three axis of port of export positive pressure
Seepage apparatus.
Background technology
The rich coal resources in China, in coal mining activity, tunnelling inevitably destroys the miniclimate of subterranean coal, changes
Original air humidity in mine.Mine contains abundant coal bed gas resource, its main component is gas.In Methane Transport in Coal Seam
During, permeability is one of gas porous flow complexity important parameter in reflection coal seam, meanwhile, permeability is also gas porous flow
One crucial research direction of mechanics and engineering.Therefore, the measuring method of coal-bed gas permeability is studied to gas porous flow mechanics
Develop most important, while a series of mine safety problems demands such as coal and gas prominent are solved.Therefore learning gas is wet
Spend the influence to coal permeability to be of great significance, can not change three axis seepage apparatus of gas humidity also so far, because
This is necessary to carry out certain improvement to existing three axis seepage apparatus to simulate the change of coal mining gas on-site humidity.
The content of the invention：
The technical problem to be solved in the present invention：A kind of change gas humidity and three axis seepage apparatus of port of export positive pressure are provided, with
Gas humidity cannot be changed by solving three axis seepage apparatus of the prior art, it is impossible to simulate the change of coal mining gas on-site humidity
The technical problems such as the influence to coal permeability.
Technical solution of the present invention：
A kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure, it includes triaxial pressure system, gas supply system
System is connected with triaxial pressure system inlet end by pipeline；The outlet side of triaxial pressure system passes through pipeline with positive pressure regulating system
Connection, positive pressure regulating system are connected with flow measuring systems by pipeline；Pressure-loaded system is connected with triaxial pressure system；Very
Empty degassing system is connected between positive pressure regulating system and flow measuring systems by pipeline.
Gas supply system includes cylinder, water vapour generation device and gas mixer, cylinder by pipeline with
Gas mixer connects, and the second pressure reducing valve, second pressure gauge and second switch valve are disposed with connecting pipe；Gas mixes
Attach together to put and be connected by pipeline with gas mixer, be disposed with connecting pipe the first pressure reducing valve, first pressure gauge and
First switch valve；Gas mixer is connected by pipeline with triaxial pressure system inlet end, is disposed with connecting pipe
3rd pressure gauge and the 3rd pressure reducing valve.
Positive pressure regulating system includes pressure gauge, the 4th pressure reducing valve and positive pressure regulating valve, is sequentially arranged at triaxial pressure system
On the pipeline of outlet side.
Flow measuring systems are flowmeter, and flowmeter is connected with positive pressure regulating system outlet side, in flowmeter and positive pressure tune
Check-valves is provided with pipeline between section system.
Pressure-loaded system includes axis press pump and confined pressure pumps, and axis press pump is connected with the axis pressure pipe of triaxial pressure system；Confined pressure
Pump is connected with the confined pressure pipe of triaxial pressure system.
Vacuum degassing system includes vacuum pump, and vacuum pump after the 3rd switch valve by being connected to positive pressure regulating system and flow
On pipeline between measurement system.
Humidity sensor is installed, humidity sensor is connected with hygronom conducting wire in triaxial pressure system.
Water vapour generation device includes water tank, and heating wire is provided with water tank, and heating wire is connected with control cabinet, control cabinet with
Display connects；Water tank top is provided with water inlet, and water inlet passes through seal cap sealing；Radiator drain is located at top right side.
Beneficial effects of the present invention：
The present invention is connected an air accumulator so that gas mixing, gas with steam generator by gas mixer
Mixing arrangement connection hygronom can monitor gas humidity situation of change in real time, pass through what is connected in triaxial cell's end port
The positive pressure regulating valve that is equipped with successively in air outlet pipe, precision pressure gauge are so as to control the size of outlet pressure, in addition in three axis
Vacuum pump is connected outside balancing gate pit, it is ensured that the air humidity entirely tested is zero, prevents atmospheric humidity from causing error to experiment；
The present invention can make raw coal carry out Seepage Experiment under gas with various damp condition, and can not coaxially be pressed and confined pressure
Seepage Experiment under the conditions of various factors coupling, can in real simulation process of coal mining mixed gas Seepage Experiment, the experiment
Device is simple to operation, and using effect is good, easy to spread；Solving three axis seepage apparatus of the prior art, cannot to change gas wet
Degree, it is impossible to simulate the technical problems such as influence of the change of coal mining gas on-site humidity to coal permeability.
Brief description of the drawings：
Fig. 1 schematic structural views of the invention；
Fig. 2 is triaxial pressure system structure diagram of the present invention.
In figure：1- air accumulators, 2- steam generators, the first pressure reducing valves of 3-, 4- first pressure gauges, 5- second are depressurized
Valve, 6- second pressure gauges, 7- first switches valve, 8- second switches valve, 9- gas mixers, 10- hygronoms, 11- inductors,
The 3rd pressure gauges of 12-, the 3rd pressure reducing valves of 13-, 14- triaxial cells, 15- axis press pump, 16- confined pressures pump, 17- precision pressure gauges,
The 4th pressure reducing valves of 18-, 19- check-valves, 20- vacuum pumps, the 3rd switch valves of 21-, 22- flowmeters, 23- displays, 24- controls
Device, 25- sealing covers, 26- heating wire, 27- water tanks, 28- outlet pipes, 29- positive pressure regulating valves.
Embodiment：
A kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure, it includes triaxial pressure system, gas supply system
System is connected with triaxial pressure system inlet end by pipeline；The outlet side of triaxial pressure system passes through pipeline with positive pressure regulating system
Connection, positive pressure regulating system are connected with flow measuring systems by pipeline；Pressure-loaded system is connected with triaxial pressure system；Very
Empty degassing system is connected between positive pressure regulating system and flow measuring systems by pipeline.
Gas supply system includes cylinder 1, water vapour generation device 2 and gas mixer 9, and cylinder 1 passes through pipe
Road is connected with gas mixer 9, and the second pressure reducing valve 5, second pressure gauge 6 and second switch valve are disposed with connecting pipe
7；Gas mixer 9 is connected by pipeline with gas mixer 9, and the first pressure reducing valve 3, are disposed with connecting pipe
One pressure gauge 4 and first switch valve 7；Gas mixer 9 is connected by pipeline with triaxial pressure system inlet end, connecting pipe
On be disposed with the 3rd pressure gauge 12 and the 3rd pressure reducing valve 13.
Positive pressure regulating system includes pressure gauge 17, the 4th pressure reducing valve 18 and positive pressure regulating valve, is sequentially arranged at triaxial pressure
On the pipeline of system outlet side.Pressure gauge 17 is precision pressure gauge.
Flow measuring systems are flowmeter 22, and flowmeter 22 is connected with positive pressure regulating system outlet side, flowmeter 22 with
Check-valves 19 is provided with pipeline between positive pressure regulating system.
Pressure-loaded system includes axis press pump 15 and confined pressure pump 16, and axis press pump 15 and the axis pressure pipe of triaxial pressure system connect
Connect；Confined pressure pump 16 is connected with the confined pressure pipe of triaxial pressure system.
Vacuum degassing system includes vacuum pump 20, and vacuum pump 20 after the 3rd switch valve 21 by being connected to positive pressure regulating system
On pipeline between flow measuring systems.
Humidity sensor 11 is installed, humidity sensor 11 is connected with 10 conducting wire of hygronom in triaxial pressure system.
Water vapour generation device 2 includes water tank 27, and heating wire 26 is provided with water tank, and heating wire is connected with control cabinet 24,
Control cabinet 24 is connected with display 23；27 top of water tank is provided with water inlet, and water inlet is sealed by sealing cover 25；Water tank 27 goes out
Water pipe 18 is located at top right side.
In use, standard-sized coal body test specimen is installed on to the confined pressure intracavitary in triaxial cell 13 on request first,
Open afterwards after coal sample and experimental provision are de-gassed six hours by vacuum pump 20 and close the 3rd switch valve 21, then pass through tune
Nodal axisn pressure oil pump 15 is pressed with confined pressure value so as to simulate coal in stress shape suffered by ground end with confined pressure oil pump 16 to the set axis of experiment
State, opens first switch valve 7 and second switch valve 8 simultaneously closes the 3rd pressure reducing valve 13, then by controller 24 by temperature control
At 100 DEG C, the water in water tank 27 is heated, then opens first switch valve 7, second switch valve 8, adjusts the first pressure reducing valve
3 and second pressure reducing valve 5 and according to first pressure gauge 4 and 6 reading of second pressure gauge to set value is tested, gas is steamed with water
Gas is uniformly mixed in gas mixer 9, and observes the gas humidity in gas mixer 9 by hygronom 10, when reaching
Closed needed for experiment during humidity by adjusting the 3rd pressure reducing valve 13 and gas is reached authorized pressure according to 12 reading of the 3rd pressure gauge
Close positive pressure regulating valve 18 so that experiment coal sample mixed gas effect under adsorb twenty four hours, afterwards adjust positive pressure regulating valve 29
To experiment desirable value to simulate the change of coal pore pressure in coal petrography recovery process, flow is recorded after 22 stable reading of flowmeter
Value, coal permeability value under the couplings such as mixed gas effect lower different humidity, axis pressure, confined pressure is calculated finally by formula.
Claims (8)
1. a kind of change gas humidity and three axis seepage apparatus of port of export positive pressure, it includes triaxial pressure system, its feature exists
In：Gas supply system is connected with triaxial pressure system inlet end by pipeline；The outlet side of triaxial pressure system and positive pressure tune
Section system is connected by pipeline, and positive pressure regulating system is connected with flow measuring systems by pipeline；Pressure-loaded system and three axis
Pressure system connects；Vacuum degassing system is connected between positive pressure regulating system and flow measuring systems by pipeline.
2. three axis seepage apparatus of a kind of change gas humidity according to claim 1 and port of export positive pressure, its feature exist
In：Gas supply system includes cylinder（1）, water vapour generation device（2）And gas mixer（9）, cylinder（1）Pass through
Pipeline and gas mixer（9）Connect, the second pressure reducing valve is disposed with connecting pipe（5）, second pressure gauge（6）With
Two switch valves（7）；Gas mixer（9）Pass through pipeline and gas mixer（9）Connect, be disposed with connecting pipe
First pressure reducing valve（3）, first pressure gauge（4）With first switch valve（7）；Gas mixer（9）Pass through pipeline and triaxial pressure
System inlet end connects, and the 3rd pressure gauge is disposed with connecting pipe（12）With the 3rd pressure reducing valve（13）.
3. three axis seepage apparatus of a kind of change gas humidity according to claim 1 and port of export positive pressure, its feature exist
In：Positive pressure regulating system includes pressure gauge（17）, the 4th pressure reducing valve（18）And positive pressure regulating valve（29）, it is sequentially arranged at three axis pressures
On the pipeline of Force system outlet side.
4. three axis seepage apparatus of a kind of change gas humidity according to claim 1 and port of export positive pressure, its feature exist
In：Flow measuring systems are flowmeter（22）, flowmeter（22）It is connected with positive pressure regulating system outlet side, in flowmeter（22）With
Check-valves is provided with pipeline between positive pressure regulating system（19）.
5. three axis seepage apparatus of a kind of change gas humidity according to claim 1 and port of export positive pressure, its feature exist
In：Pressure-loaded system includes axis press pump（15）Pumped with confined pressure（16）, axis press pump（15）Connect with the axis pressure pipe of triaxial pressure system
Connect；Confined pressure pumps（16）It is connected with the confined pressure pipe of triaxial pressure system.
6. three axis seepage apparatus of a kind of change gas humidity according to claim 4 and port of export positive pressure, its feature exist
In：Vacuum degassing system includes vacuum pump（20）, vacuum pump（20）Pass through the 3rd switch valve（21）After be connected to positive pressure adjust system
On pipeline between system and flow measuring systems.
7. three axis seepage apparatus of a kind of change gas humidity according to claim 1 and port of export positive pressure, its feature exist
In：Humidity sensor is installed in triaxial pressure system（11）, humidity sensor（11）With hygronom（10）Conducting wire connects.
8. three axis seepage apparatus of a kind of change gas humidity according to claim 2 and port of export positive pressure, its feature exist
In：Water vapour generation device（2）Including water tank（27）, heating wire is installed in water tank（26）, heating wire and control cabinet（24）Even
Connect, control cabinet（24）With display（23）Connection；Water tank（27）Top is provided with water inlet, and water inlet passes through sealing cover（25）It is close
Envelope；Water tank（27）Outlet pipe（18）Positioned at top right side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711249856.2A CN107907466A (en) | 2017-12-01 | 2017-12-01 | It is a kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711249856.2A CN107907466A (en) | 2017-12-01 | 2017-12-01 | It is a kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure |
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| CN107907466A true CN107907466A (en) | 2018-04-13 |
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| CN201711249856.2A Pending CN107907466A (en) | 2017-12-01 | 2017-12-01 | It is a kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870399A (en) * | 2019-04-02 | 2019-06-11 | 贵州大学 | A kind of three axis seepage apparatus and operating method of changeable mixed gas pH value |
| CN109991149A (en) * | 2019-05-08 | 2019-07-09 | 贵州大学 | A kind of three axis seepage apparatus and operating method changing mixed gas density |
| CN110018107A (en) * | 2019-05-08 | 2019-07-16 | 贵州大学 | A kind of the isothermal adsorption device and operating method of changeable mixed gas viscosity |
| CN110018106A (en) * | 2019-05-08 | 2019-07-16 | 贵州大学 | Change the three axis seepage apparatus of outlet end negative pressure and operating method of mixed gas temperature |
| CN110160939A (en) * | 2019-07-04 | 2019-08-23 | 贵州大学 | A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity |
| CN111595749A (en) * | 2020-05-26 | 2020-08-28 | 中国矿业大学 | Device and method for maintaining humidity of sample in real time in triaxial test process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870399A (en) * | 2019-04-02 | 2019-06-11 | 贵州大学 | A kind of three axis seepage apparatus and operating method of changeable mixed gas pH value |
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| CN110018107A (en) * | 2019-05-08 | 2019-07-16 | 贵州大学 | A kind of the isothermal adsorption device and operating method of changeable mixed gas viscosity |
| CN110018106A (en) * | 2019-05-08 | 2019-07-16 | 贵州大学 | Change the three axis seepage apparatus of outlet end negative pressure and operating method of mixed gas temperature |
| CN110160939A (en) * | 2019-07-04 | 2019-08-23 | 贵州大学 | A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity |
| CN111595749A (en) * | 2020-05-26 | 2020-08-28 | 中国矿业大学 | Device and method for maintaining humidity of sample in real time in triaxial test process |
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