CN102967544B - Device for gas test and application thereof - Google Patents
Device for gas test and application thereof Download PDFInfo
- Publication number
- CN102967544B CN102967544B CN201210514830.7A CN201210514830A CN102967544B CN 102967544 B CN102967544 B CN 102967544B CN 201210514830 A CN201210514830 A CN 201210514830A CN 102967544 B CN102967544 B CN 102967544B
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- Prior art keywords
- gas
- test
- stop valve
- tensimeter
- pipe fitting
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- 238000004088 simulation Methods 0.000 claims abstract description 25
- 238000007906 compression Methods 0.000 claims description 16
- 239000011435 rock Substances 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 239000003245 coal Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 239000012528 membrane Substances 0.000 description 7
- 238000003825 pressing Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000717 retained Effects 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 206010061245 Internal injury Diseases 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000001186 cumulative Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000737 periodic Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001052 transient Effects 0.000 description 1
Abstract
The invention relates to a device for gas test. The device comprises a gas source, a vacuum pump, a first flow meter, a second flow meter, a first pressure gauge, a second pressure gauge, a first gas storage device, a second gas storage device, a data processor, a first gas output pipe and a second gas output pipe. The device for the gas test can be applied in a gas permeation simulation test and also can be applied in an internal dissolving chamber pressure simulation test.
Description
Technical field
The invention belongs to gaseous tension and flow rate test field, particularly a kind of device for pressure change modeling test in the simulation of infiltration test under coal petrography gas pressure and rock gas gas storage.
Background technology
Usually containing methane gas in the coal of land burial, and there is certain pressure, to the disturbance of coal and rock in progress of coal mining, coal and rock inside can be caused to occur crackle and destroy, when the pressure that the methane gas in coal is assembled along coal and rock crack passage in certain space and concentration reach certain value, then can cause the disaster accident such as Gas Outburst and gas explosion.Therefore, how to rest in high methane pressure in coal underground mining process by test to affect the mechanical behavior of coal and rock, and the coal and rock that exploitation disturbance causes is destroyed gas infiltrative impact in coal and rock, not only for how effectively, the generation research of disaster prevention accident is particularly important, also needs the difficult problem solved especially in current experimental test.
In addition, in the operation process of underground rock gas gas storage, in molten chamber, pressure is in periodic high pressure and low pressure recycle, cavity's surrounding rock can be caused to occur fatigue damage, how by test, simulation test to be carried out to the fatigue properties of molten chamber in interior pressure cyclical variation process, and the course of cracks forming and distribution characteristics are simulated and studied in laboratory is to gas exploitation course, yet lack the relevant device that can carry out Validity Test at present.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of device for gas test, described device can be pressed in simulation test and be applied in gas permeation simulation test and molten chamber.
Device for gas test of the present invention, comprises source of the gas, vacuum pump, first-class gauge, second gauge, the first tensimeter, the second tensimeter, the first gas reservoir, the second gas reservoir, data processor, the first gas output tube and the second gas output tube, described first tensimeter is connected with the second pipeline of the triaxial cell in first-class gauge and triaxial compression test machine respectively by pipe fitting, described second tensimeter is connected with the first pipeline of the triaxial cell in triaxial compression test machine and second gauge respectively by pipe fitting, second gauge is also connected with total air escape pipe, and total air escape pipe is provided with the 3rd reduction valve, pipe fitting between first-class gauge and the first tensimeter is provided with the first stop valve, pipe fitting between first tensimeter and triaxial cell is provided with the second stop valve, pipe fitting between triaxial cell and the second tensimeter is provided with the 3rd stop valve, pipe fitting between second tensimeter and second gauge is provided with the 4th stop valve, pipe fitting between second stop valve and triaxial cell is connected with the first test tube, described first test tube is provided with the 5th stop valve, pipe fitting between triaxial cell and the 3rd stop valve is connected with the second test tube, described second test tube is provided with the 6th stop valve, described source of the gas is connected with vacuum pump and first-class gauge respectively by the first gas output tube, the connection site of vacuum pump and the first gas output tube, under the connection site of first-class gauge and the first gas output tube, is provided with the first reduction valve at the close source of the gas end of the first gas output tube, described source of the gas is connected with total air escape pipe by the second gas output tube, connects site between second gauge and the 3rd reduction valve, the close source of the gas end of the second gas output tube is provided with the second reduction valve, described first gas reservoir is connected with the first gas output tube by pipe fitting, connects site between the first reduction valve and the connection site of first-class gauge and the first gas output tube, the pipe fitting of connection first gas reservoir is provided with the 7th stop valve, described second gas reservoir is connected with the second gas output tube by pipe fitting, connects site in the gas output end side of the second reduction valve, the pipe fitting of connection second gas reservoir is provided with the 8th stop valve, the interface of described data processor is connected with first-class gauge, second gauge, the first tensimeter, the second tensimeter respectively, is shown and store after the gas flow received and gas electric pressure signal being processed.
Device for gas test of the present invention, its data processor is computing machine or single-chip microcomputer.
Device for gas test of the present invention, can press in simulation test and apply in gas permeation simulation test and molten chamber, when carrying out pressing simulation test in gas permeation simulation test and molten chamber, needs triaxial compression test machine to coordinate.
Device for gas test of the present invention can be applied in gas permeation simulation test, also can press in simulation test in molten chamber and apply.
The first gas reservoir for relating in the device of gas test of the present invention, the second gas reservoir, first-class gauge, second gauge, the first tensimeter, the second tensimeter all have commercial goods, buy by market.
The present invention has following beneficial effect:
1, the present invention is that in gas pressure simulation test and rock gas gas storage, the test of pressure change modeling provides a kind of new proving installation.
2, device of the present invention both can be used for gas pressure simulation test, can be used for again pressure change modeling test in rock gas gas storage, and easy to operate.
3, because device of the present invention is provided with the first test tube and the second test tube, be thus convenient to find to apply in simulation test the test specimen diaphragm partial failure problem that confined pressure pressure causes, be conducive to the protection of flowmeter.
4, device of the present invention can also cause in rock the fracture simulation research forming Fracture Networks by expansive approach under high pressure, low gas circulation change to rock.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device for gas test of the present invention;
Fig. 2 is that the structural representation of triaxial cell in triaxial compression test machine and test specimen are installed and line arrangement schematic diagram;
Fig. 3 is the schematic diagram of pressing simulation test test specimen used in molten chamber.
In figure, 1-source of the gas, 2-vacuum pump, 3-first-class gauge, 4-the first tensimeter, 5-the second tensimeter, 6-second gauge, 7-data processor, 8-the first gas reservoir, 9-the second gas reservoir, 10-triaxial cell, 11-the second reduction valve, 12-the first reduction valve, 13-the seven stop valve, 14-the eight stop valve, 15-the first stop valve, 16-the second stop valve, 17-the five stop valve, 18-the six stop valve, 19-the three stop valve, 20-the four stop valve, 21-the three reduction valve, 22-the second gas output tube, 23-the first gas output tube, 24-total air escape pipe, 25-the first test tube, 26-the second test tube, 27-load column, 28-triaxial pressure chamber enclosure, 29-top loads pressure head, 30-protection glued membrane, 31-gas permeation imitation specimen, 32-bottom loads pressure head, 33-confined pressure pipeline, 34-triaxial cell base, 35-the first pipeline, 36-the second pipeline, imitation specimen is pressed in 37-molten chamber, imitation specimen center pit is pressed in 38-chamber.
Embodiment
By reference to the accompanying drawings the structure of the device for gas test of the present invention and use to be described further below by embodiment.
Embodiment 1
In the present embodiment, for the device of gas test structure as shown in Figure 1, comprise source of the gas 1, vacuum pump 2, first-class gauge 3, second gauge 6, first tensimeter 4, second tensimeter 5, first gas reservoir 8, second gas reservoir 9, data processor 7, first gas output tube 23, second gas output tube 22, first reduction valve, second reduction valve 11, 3rd reduction valve 21, first stop valve 15, second stop valve 16, 3rd stop valve 19, 4th stop valve 20, 5th stop valve 17, 6th stop valve 18, 7th stop valve 13, 8th stop valve 14, first test tube 25, second test tube 26 and total air escape pipe 24, the mounting means of above-mentioned each device, pipe fitting, reduction valve, stop valve and data processor, vacuum pump and annexation are as shown in Figure 1.Described source of the gas 3 is air feed bottle, and its original pressure is 12MPa; Described data processor 7 is computing machine, is provided with the software being shown and store after the gas flow received and gas electric pressure signal being processed.
For the device of gas test described in the present embodiment, its matching used triaxial compression test type number is that MTS815(American MTS company produces).
Embodiment 2
The present embodiment uses the triaxial compression test machine being MTS815 for device and the model of gas test described in embodiment 1 to carry out gas permeation simulation test, operates as follows:
1, the operation of preparatory stage
1. on the sample bench gas permeation imitation specimen 31 being enclosed with protection glued membrane 30 being arranged on the triaxial cell 10 of triaxial compression test machine (as shown in Figure 2), second pipeline 36 of the triaxial cell in triaxial compression test machine is connected with the first tensimeter 4 of device described in embodiment 1 by pipe fitting, first pipeline 35 of the triaxial cell in triaxial compression test machine is connected (as shown in Figure 1 and Figure 2) with the second tensimeter 5 of device described in embodiment 1 by pipe fitting, then confined pressure pressure is applied to gas permeation imitation specimen 31;
2. gas permeation imitation specimen 31 is being applied in the process of confined pressure pressure, make the first stop valve 15, 4th stop valve 20, 5th stop valve 17, 6th stop valve 18 is in closed condition, second stop valve 16, 3rd stop valve 19 is in opening, whether pressure increases to observe the first tensimeter 4 and the second tensimeter 5, if pressure increases, then show that test specimen protection glued membrane may be damaged, now need to open the 5th stop valve 17, 6th stop valve 18, see if there is confined pressure liquid to discharge, if discharge without confined pressure liquid, then show that test specimen protection glued membrane is intact, if there is confined pressure liquid to discharge, then show that test specimen protection glued membrane is damaged, if test specimen protection glued membrane is damaged, test specimen need be changed,
3. the confined pressure pressure-loaded in the triaxial cell 10 of triaxial compression test machine is to target confined pressure, the source of the gas 1 in device described in embodiment 1, the 3rd reduction valve 21, the 5th stop valve 17, the 6th stop valve 18 is made to be in closed condition, other all stop valve and reduction valve are all in opening, then start vacuum pump 2 pairs of pipelines, each gas reservoir and test specimen to vacuumize, make Pressure Drop to 0.08 ~ 0.1 MPa, vacuumize rear closedown vacuum pump 2 and all stop valves of having opened and reduction valve;
The operation in 2, gas permeation simulation test stage
1. when adopting steady state method test, the 7th stop valve 13, the 8th stop valve 14, the 5th stop valve 17, the 6th stop valve 18, second reduction valve 11, the 3rd reduction valve 21 is kept to be in closed condition, the first stop valve 15, second stop valve 16, the 3rd stop valve 19, the 4th stop valve 20 is made to be in opening, the pressure adjusting of the first reduction valve 12 is opened to 5MPa, open the 3rd reduction valve 21 again, and open the switch of source of the gas 1, start to test, start data processor 7 and receive, process and record data.
2. when adopting Transient Method test, keep the 5th stop valve 17, 6th stop valve 18, 3rd reduction valve 21 is in closed condition, make the 7th stop valve 13, 8th stop valve 14, first stop valve 15 the 4th stop valve 20 is in opening, by the pressure adjusting of the first reduction valve 12 to 6MPa, the pressure adjusting of the second reduction valve 11 is to 3MPa and open, then source of the gas 1 is opened, make the first gas reservoir 8, the gas of full 6MPa and 3MPa pressure is stored respectively in second gas reservoir 9, continue after close the first reduction valve 12, second reduction valve 11, open the second stop valve 16 simultaneously, 3rd stop valve 19, start to test, start data processor 7 to receive, process and record data.
Embodiment 3
The present embodiment uses the triaxial compression test machine being MTS815 for device and the model of gas test described in embodiment 1 to carry out pressing simulation test in molten chamber, operation as follows:
1, the operation of preparatory stage
By be enclosed with protection glued membrane 30 molten chamber in press imitation specimen 37 to be arranged on the sample bench of triaxial cell 10 of triaxial compression test machine, other operation is identical with the operation of embodiment 2 preparatory stage.
2, in molten chamber, the operation of experimental stage intended by pressing mold
The second reduction valve 11, the 7th stop valve 13, the 8th stop valve 14, the 5th stop valve 17, the 6th stop valve 18 is kept to be in closed condition, the first stop valve 15, second stop valve 16, the 3rd stop valve 19, the 4th stop valve 20 is made to be in opening, the pressure adjusting of the first reduction valve 12 is opened this valve to 8MPa, the air pressure of test specimen 37 in triaxial cell 10 is made to be retained to schedule time 30min, then the first reduction valve 12 is closed, 3rd reduction valve 21 pressure adjusting opened to 3MPa, the pressure in release test specimen 37 is to 3MPa; Repeat aforesaid operations 30 times;
Or keep the first reduction valve 12, the 7th stop valve 13, the 8th stop valve 14, second stop valve 16, the 5th stop valve 17, the 6th stop valve 18 to be in closed condition, 3rd stop valve 19, the 4th stop valve 20 are in opening, the pressure adjusting of the second reduction valve 11 is opened this valve to 8MPa, the air pressure of test specimen 37 in triaxial cell 10 is made to be retained to schedule time 30min, then the second reduction valve 11 is closed, 3rd reduction valve 21 pressure adjusting opened to 3MPa, the pressure in release test specimen 37 is to 3MPa; Repeat aforesaid operations 30 times;
In test process, start data processor 7 and receive, process and record data.
Flow and the pressure data of the methane gas recorded by data processor in gas permeation simulation test substitute into corresponding gas permeation rate and calculate theoretical formula, the gas permeation rate of test specimen under test mode can be calculated, in conjunction with deformation data and the stress data of the test specimen of triaxial compression test machine record, the gas permeation rate corresponding to test specimen different distortion state can be obtained.
The gas flow of pressing the test specimen that data processor records in simulation test to bear in molten chamber and pressure data are in conjunction with the deformation data of the test specimen of triaxial compression test machine record and stress data, the relation that pressure change frequency that test specimen bears, cumulative time and test specimen are out of shape can be obtained, and test specimen Industrial CT Machine can be scanned the internal injury distribution before and after its test, thus it is inner in the damage profile feature of carrying out pressing in the molten chamber of rock gas gas storage before and after simulation test to obtain test specimen.
Above-mentioned data have important directive function for the research security of coal mining and the safe operation of underground rock gas gas storage.
Claims (4)
1., for a device for gas test, it is characterized in that comprising source of the gas (1), vacuum pump (2), first-class gauge (3), second gauge (6), the first tensimeter (4), the second tensimeter (5), the first gas reservoir (8), the second gas reservoir (9), data processor (7), the first gas output tube (23) and the second gas output tube (22);
Described first tensimeter (4) is connected with second pipeline (36) of the triaxial cell (10) in first-class gauge (3) and triaxial compression test machine respectively by pipe fitting, described second tensimeter (5) is connected with first pipeline (35) of the triaxial cell (10) in triaxial compression test machine and second gauge (6) respectively by pipe fitting, second gauge (6) is also connected with total air escape pipe (24), and total air escape pipe (24) is provided with the 3rd reduction valve (21);
Pipe fitting between first-class gauge (3) and the first tensimeter (4) is provided with the first stop valve (15), pipe fitting between first tensimeter (4) and triaxial cell (10) is provided with the second stop valve (16), pipe fitting between triaxial cell (10) and the second tensimeter (5) is provided with the 3rd stop valve (19), pipe fitting between second tensimeter (5) and second gauge (6) is provided with the 4th stop valve (20), pipe fitting between second stop valve (16) and triaxial cell (10) is connected with the first test tube (25), described first test tube is provided with the 5th stop valve (17), pipe fitting between triaxial cell (10) and the 3rd stop valve (19) is connected with the second test tube (26), described second test tube is provided with the 6th stop valve (18),
Described source of the gas (1) is connected with vacuum pump (2) and first-class gauge (3) respectively by the first gas output tube (23), the connection site of vacuum pump (2) and the first gas output tube (23), under first-class gauge (3) with the connection site of the first gas output tube (23), is provided with the first reduction valve (12) at the close source of the gas end of the first gas output tube (23);
Described source of the gas (1) is connected with total air escape pipe (24) by the second gas output tube (22), connect site between second gauge (6) and the 3rd reduction valve (21), the close source of the gas end of the second gas output tube (22) is provided with the second reduction valve (11);
Described first gas reservoir (8) is connected with the first gas output tube (23) by pipe fitting, connect site the first reduction valve (12) and first-class gauge (3 and first gas output tube (23) connection site between, the pipe fitting of connection first gas reservoir (8) is provided with the 7th stop valve (13);
Described second gas reservoir (9) is connected with the second gas output tube (22) by pipe fitting, connects site in the gas output end side of the second reduction valve (11), the pipe fitting of connection second gas reservoir (9) is provided with the 8th stop valve (14);
The interface of described data processor (7) is connected with first-class gauge (3), second gauge (6), the first tensimeter (4), the second tensimeter (5) respectively, is shown and store after the gas flow received and gas electric pressure signal being processed.
2., according to claim 1 for the device of gas test, it is characterized in that described data processor (7) is for computing machine or single-chip microcomputer.
3. described in claim 1 or 2 for the application of the device of gas test in gas permeation simulation test.
4. in molten chamber, the application in simulation test described in claim 1 or 2, is pressed for the device of gas test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210514830.7A CN102967544B (en) | 2012-12-04 | 2012-12-04 | Device for gas test and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210514830.7A CN102967544B (en) | 2012-12-04 | 2012-12-04 | Device for gas test and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102967544A CN102967544A (en) | 2013-03-13 |
| CN102967544B true CN102967544B (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210514830.7A Expired - Fee Related CN102967544B (en) | 2012-12-04 | 2012-12-04 | Device for gas test and application thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN102967544B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064971B (en) * | 2015-09-08 | 2017-09-19 | 中国矿业大学 | A kind of high pressure nitrogen blast cracking anti-reflection experimental device and method |
| CN105136646A (en) * | 2015-09-15 | 2015-12-09 | 东北大学 | Permeability evolution experimental device and method considering shale adsorption and fracturing process |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7274447B2 (en) * | 2004-06-21 | 2007-09-25 | Swce | Material porosity pressure impulse testing system |
| CN101231226B (en) * | 2008-01-29 | 2010-12-15 | 成都理工大学 | Rock high pressure infiltration experiment system |
| CN102507407B (en) * | 2011-09-30 | 2013-02-06 | 西南石油大学 | Device and method for simultaneously measuring permeability coefficient, compressibility coefficient and porosity of rock |
| CN102980709B (en) * | 2012-12-04 | 2014-12-17 | 四川大学 | Gas pressure and flow testing device and application thereof |
| CN203011804U (en) * | 2012-12-04 | 2013-06-19 | 核工业北京地质研究院 | Gas test device |
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2012
- 2012-12-04 CN CN201210514830.7A patent/CN102967544B/en not_active Expired - Fee Related
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| CN102967544A (en) | 2013-03-13 |
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