CN209656519U - A kind of three axis seepage apparatus of changeable mixed gas pH value - Google Patents
A kind of three axis seepage apparatus of changeable mixed gas pH value Download PDFInfo
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- CN209656519U CN209656519U CN201920439754.5U CN201920439754U CN209656519U CN 209656519 U CN209656519 U CN 209656519U CN 201920439754 U CN201920439754 U CN 201920439754U CN 209656519 U CN209656519 U CN 209656519U
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Abstract
The utility model discloses a kind of three axis seepage apparatus of changeable mixed gas pH value, it includes mixed gas feed system, and mixed gas feed system and gas mixing system pass through piping connection；Gas mixing system and triaxial pressure system pass through piping connection；Triaxial pressure system and vacuum degassing system pass through piping connection；Vacuum degassing system and flow measuring systems pass through piping connection；The gas mixing system includes gas mixing chamber (14), is equipped with PH sensor (30) in gas mixing chamber (14), has PH sensor (30) to connect with pH value analyzer (13) by conducting wire；Solve the technical problems such as the variation of three axis seepage apparatus simulation coal mining scene mixed gas pH value of the not changeable mixed gas pH value of the prior art.
Description
Technical field
The utility model belongs to seepage flow technical field more particularly to a kind of three axis seepage flow of changeable mixed gas pH value
Device.
Background technique
The coal resources of the rich reserves in China, under complicated reservoir conditions, the gas in gas porous flow channel has
Different pH values.During Methane Transport in Coal Seam, permeability is gas porous flow complexity important parameter in reflection coal seam
One of, meanwhile, permeability is also a crucial research direction of gas porous flow mechanics and engineering.Therefore, coal-bed gas permeability
Measuring method research it is most important to gas porous flow Mechanics Development, a series of while mine safety problems such as coal and gas prominent
Urgently it is solved.And gas is that one kind contains CH4、CO2And SO2Etc. various mixed gases composition gas, study mixed gas
Influence of the pH value to coal permeability is of great significance, and there are no three axis of changeable mixed gas pH value infiltrations so far
Flow device, it is therefore necessary to which certain improvement is carried out to simulate coal mining scene mixed gas to existing three axis seepage apparatus
The variation of pH value.
Utility model content
Technical problem to be solved by the utility model is: providing a kind of three axis seepage flow dress of changeable mixed gas pH value
It sets, simulates coal mining scene gaseous mixture to solve three axis seepage apparatus of the not changeable mixed gas pH value of the prior art
The technical problems such as the variation of body pH value.
Technical solutions of the utility model:
A kind of three axis seepage apparatus of changeable mixed gas pH value, it includes mixed gas feed system, gaseous mixture
Body feed system and gas mixing system pass through piping connection；Gas mixing system and triaxial pressure system pass through piping connection；
Triaxial pressure system and vacuum degassing system pass through piping connection；Vacuum degassing system and flow measuring systems are connected by pipeline
It connects；The gas mixing system includes gas mixing chamber, and gas mixing is intracavitary to be equipped with PH sensor, there is PH sensor and pH value
Analyzer is connected by conducting wire.
Mixed gas feed system includes mixed gas tank, sour gas tank and alkaline gas tank, mixed gas tank, acidity
Gas tank and alkaline gas tank pass through pipeline respectively and connect with gas mixing system；The company of mixed gas tank and gas mixing system
Adapter tube road is sequentially installed with the first pressure reducing valve, third pressure gauge and third switch valve；Sour gas tank and gas mixing system
Connecting line on be sequentially installed with the second pressure reducing valve second pressure gauge and second switch valve；Alkaline gas tank and gas mixing system
Third pressure reducing valve, first pressure gauge (7) and first switch valve are sequentially installed on the connecting line of system.
Triaxial pressure system includes triaxial cell, and mistress passes through axis pressure pipe and confining pressure pipe connecting shaft press pump and confining pressure pump；
The 5th pressure gauge and the 4th pressure reducing valve are sequentially installed on gas mixing system and the connecting line of triaxial pressure system.
Vacuum degassing system includes vacuum pump, and vacuum pump and the outlet end of triaxial pressure system pass through piping connection；In pipe
Road is sequentially installed with pressure gauge, the 5th pressure reducing valve and flanged valve.
Flow measuring systems include flowmeter, are equipped with check-valves on the connecting line of flowmeter and vacuum degassing system.
A kind of operating method of three axis seepage apparatus of changeable mixed gas pH value, it includes:
Step 1, the confining pressure that standard-sized coal body test specimen is mounted on triaxial cell as required are intracavitary, open later true
Sky pump closes flanged valve after being de-gassed coal sample and experimental provision six hours；
Step 2 is pressed with confining pressure value to set axis is tested to simulate coal by adjustment axis pressure oil pump and confining pressure oil pump
The stress state suffered by ground end；
Step 3 opens the first pressure reducing valve, third switch valve, observes the gas in gas mixer by pH value analyzer
Body pH value；
Step 4 is adjusted by opening the second pressure reducing valve and second switch valve or third pressure reducing valve and first switch valve
The intracavitary pH value of gas mixing；
By adjusting the 4th pressure reducing valve and making gas according to the 5th pressure gauge reading when step 5, the pH value needed for reaching experiment
Body reaches authorized pressure and experiment coal sample is made to adsorb twenty four hours under mixed gas effect；
Step 6 adjusts the variation that the 4th pressure reducing valve simulates coal pore pressure in coal petrography recovery process to test desirable value,
Flow value is recorded after meter readings are stablized, different humidity under mixed gas acts on is calculated finally by formula, axis pressure, encloses
Press coal permeability value under coupling.
The utility model the utility model has the advantages that
The utility model, by the gas mixing of three gas tanks, is surveyed by gas mixing system in gas mixing chamber connection pH value
Determining instrument can be monitored in real time the situation of change of mixed gas pH value, pass through the escape pipe connected in triaxial cell's end port
On be successively arranged the 4th pressure reducing valve valve, precision pressure gauge so as to control the size of outlet pressure, furthermore in triaxial pressure
Outdoor connection vacuum pump, it is ensured that the intrusion for preventing foreign gas prevents foreign gas from causing error to experiment.This is practical new
Type can make raw coal carry out Seepage Experiment under the conditions of different mixed gas pH values, and be able to carry out and coaxially do not press and enclose
Press Seepage Experiment under the conditions of various factors coupling, can in real simulation process of coal mining mixed gas Seepage Experiment, the reality
Experiment device is simple to operation, and using effect is good, easy to spread；Solves the not changeable mixed gas pH value of the prior art
Three axis seepage apparatus simulate the technical problems such as the variation of coal mining scene mixed gas pH value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model entirety；
Fig. 2 is the structural schematic diagram of the improved triaxial cell of the utility model.
In figure: 1- mixed gas tank, 2- sour gas tank, 3- alkaline gas tank, the first pressure reducing valve of 4-, 5- second are depressurized
Valve, 6- third pressure reducing valve, 7- first pressure gauge, 8- first switch valve, 9- second pressure gauge, 10- second switch valve, 11- third
Pressure gauge, 12- third switch valve, 13-PH Meter, 14- gas mixing chamber, the 5th pressure gauge of 15-, the 4th pressure reducing valve of 16-,
17- axis press pump, the triaxial cell 18-, 19- confining pressure pump, 20- precision pressure gauge, the 5th pressure reducing valve of 21-, 22- flanged valve, 23- are true
Empty pump, 24- check-valves, 25- flowmeter, 26- mixed gas pipeline, 27- sour gas pipeline, 28- alkaline gas pipeline, 29-
Display, 30-PH value sensor, 31- outlet pipe, 32- gas mixing box.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Please refer to Fig. 1-2
A kind of three axis seepage apparatus of changeable mixed gas pH value, it includes mixed gas feed system, gaseous mixture
Body feed system and gas mixing system pass through piping connection；Gas mixing system and triaxial pressure system pass through piping connection；
Triaxial pressure system and vacuum degassing system pass through piping connection；Vacuum degassing system and flow measuring systems are connected by pipeline
It connects；The gas mixing system includes gas mixing 14, and PH sensor 30 is equipped in gas mixing 14, have PH sensor 30 with
PH value analyzer 13 is connected by conducting wire.
Mixed gas feed system includes mixed gas tank 1, sour gas tank 2 and alkaline gas tank 3, mixed gas tank 1,
Sour gas tank 2 and alkaline gas tank 3 are connect by pipeline with gas mixing system respectively；Mixed gas tank 1 and gas mixing
The first pressure reducing valve 4, third pressure gauge 11 and third switch valve 12 are sequentially installed on the connecting line of system；Sour gas tank 2
With the second pressure reducing valve 5, second pressure gauge 9 and second switch valve 10 are sequentially installed on the connecting line of gas mixing system；Alkali
Third pressure reducing valve 6 is sequentially installed in property gas tank 3 and the connecting line of gas mixing system, first pressure gauge 7 and first is opened
Close valve 8.
Triaxial pressure system includes triaxial cell 18, and mistress passes through axis pressure pipe and confining pressure pipe connecting shaft press pump 17 and confining pressure
Pump 19；The 5th pressure gauge 15 and the 4th pressure reducing valve are sequentially installed on gas mixing system and the connecting line of triaxial pressure system
16。
Vacuum degassing system includes vacuum pump 23, and vacuum pump 23 and the outlet end of triaxial pressure system pass through piping connection；
Pressure gauge 20, the 5th pressure reducing valve 21 and flanged valve 22 are sequentially installed on pipeline.
Flow measuring systems include flowmeter 25, are equipped with non-return on flowmeter 25 and the connecting line of vacuum degassing system
Valve 24.
In use, the confining pressure that standard-sized coal body test specimen is mounted on as required in triaxial cell 18 first is intracavitary,
It is opened after coal sample and experimental provision are de-gassed six hours by vacuum pump 23 later and closes flanged valve 22, then pass through adjustment axis
Pressure oil pump 17 and confining pressure oil pump 19 to the set axis pressure of experiment simulate coal stress state suffered by ground end with confining pressure value, beat
The first pressure reducing valve 4, third switch valve 12 are opened, the gas pH value in gas mixer 14 is observed by pH value analyzer 13,
And by opening the second pressure reducing valve 5 and second switch valve 10 or third pressure reducing valve 6 and first switch valve 8 come regulating gas mixing
Intracavitary pH value, passing through the 4th pressure reducing valve 16 of adjusting when reaching and testing required pH value and being read according to the 5th pressure gauge 15 makes gas
Body reaches authorized pressure and experiment coal sample is made to adsorb twenty four hours under mixed gas effect, adjusts the 4th pressure reducing valve 16 later
The variation that coal pore pressure in coal petrography recovery process is simulated to test desirable value, records flow after 25 stable reading of flowmeter
Value calculates mixed gas finally by formula and acts on coal permeability value under the couplings such as lower different humidity, axis pressure, confining pressure.
Claims (5)
1. a kind of three axis seepage apparatus of changeable mixed gas pH value, it includes mixed gas feed system, and feature exists
In: mixed gas feed system and gas mixing system pass through piping connection；Gas mixing system passes through with triaxial pressure system
Piping connection；Triaxial pressure system and vacuum degassing system pass through piping connection；Vacuum degassing system and flow measuring systems are logical
Cross piping connection；The gas mixing system includes gas mixing chamber (14), is equipped with PH sensor in gas mixing chamber (14)
(30), PH sensor (30) connect with pH value analyzer (13) by conducting wire.
2. a kind of three axis seepage apparatus of changeable mixed gas pH value according to claim 1, it is characterised in that: mixed
Closing gas supply system includes mixed gas tank (1), sour gas tank (2) and alkaline gas tank (3), mixed gas tank (1), acid
Property gas tank (2) and alkaline gas tank (3) connect with gas mixing system by pipeline respectively；Mixed gas tank (1) and gas
The first pressure reducing valve (4), third pressure gauge (11) and third switch valve (12) are sequentially installed on the connecting line of hybrid system；Acid
Property gas tank (2) and gas mixing system connecting line on be sequentially installed with the second pressure reducing valve (5), second pressure gauge (9) and
Second switch valve (10)；Third pressure reducing valve is sequentially installed on the connecting line of alkaline gas tank (3) and gas mixing system
(6), first pressure gauge (7) and first switch valve (8).
3. a kind of three axis seepage apparatus of changeable mixed gas pH value according to claim 1, it is characterised in that: three
Axis pressure system includes triaxial cell (18), and mistress passes through axis pressure pipe and confining pressure pipe connecting shaft press pump (17) and confining pressure pump
(19)；The 5th pressure gauge (15) and the 4th decompression are sequentially installed on gas mixing system and the connecting line of triaxial pressure system
Valve (16).
4. a kind of three axis seepage apparatus of changeable mixed gas pH value according to claim 1, it is characterised in that: true
Empty degassing system includes vacuum pump (23), and vacuum pump (23) and the outlet end of triaxial pressure system pass through piping connection；In pipeline
On be sequentially installed with pressure gauge (20), the 5th pressure reducing valve (21) and flanged valve (22).
5. a kind of three axis seepage apparatus of changeable mixed gas pH value according to claim 1, it is characterised in that: stream
It includes flowmeter (25) that system is determined in measurement, is equipped with check-valves on flowmeter (25) and the connecting line of vacuum degassing system
(24).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920439754.5U CN209656519U (en) | 2019-04-02 | 2019-04-02 | A kind of three axis seepage apparatus of changeable mixed gas pH value |
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| CN201920439754.5U CN209656519U (en) | 2019-04-02 | 2019-04-02 | A kind of three axis seepage apparatus of changeable mixed gas pH value |
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Cited By (1)
| 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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2019
- 2019-04-02 CN CN201920439754.5U patent/CN209656519U/en active Active
Cited By (1)
| 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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