CN102980709B - Gas pressure and flow testing device and application thereof - Google Patents
Gas pressure and flow testing device and application thereof Download PDFInfo
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- CN102980709B CN102980709B CN201210512962.6A CN201210512962A CN102980709B CN 102980709 B CN102980709 B CN 102980709B CN 201210512962 A CN201210512962 A CN 201210512962A CN 102980709 B CN102980709 B CN 102980709B
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Abstract
The invention discloses a pressure and flow testing device which comprises the following three structures: 1, the first structure comprises a gas source, a first gas reservoir, a second gas reservoir, a third gas reservoir, a first flow meter, a second flow meter, a first pressure gauge, a second pressure gauge, a data processor, a first gas output pipe and a second gas output pipe; 2, based on the first structure, the second structure further comprises an air compressor, an air dryer and a supercharger; and 3, based on the second structure, the third structure further comprises a third gas output pipe and a fourth gas output pipe. The gas pressure and flowing testing device provided by the invention can be applied in a gas permeation simulation test, and also can be applied in a dissolution cavity inner 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 this invention is to provide gaseous tension and flow testing device; this device not only can carry out pressure change modeling test in gas pressure simulation test and rock gas gas storage; and solve, in gas pressure simulation test, the difficult problem that gentleness adds high pressure is added to methane gas, and solve and to prevent from causing the partial failure of test specimen diaphragm because applying confined pressure pressure and causing three axle confined pressure liquid to enter the difficult problem that gas osmosis system flow meter causes damage in simulation test.
Pressure of the present invention and flow testing device have following three kinds of structures, but it belongs to a total inventive concept.
1, the gaseous tension of the first structure and flow testing device
This kind of gaseous tension and flow testing device comprise source of the gas, the first gas reservoir, the second gas reservoir, the 3rd gas reservoir, first-class gauge, second gauge, the first tensimeter, the second tensimeter, data processor, the first gas output tube and the second gas output tube, described first gas reservoir, first-class gauge are connected in series by pipe fitting, 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 gas reservoir and first-class gauge is provided with the second 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 the first gas reservoir by the first gas output tube, the first gas output tube is provided with the first reduction valve, described second gas reservoir is connected on the pipe fitting between the second reduction valve and first-class gauge by pipe fitting, and the pipe fitting of connection second gas reservoir is provided with the 7th stop valve, described 3rd gas reservoir is connected with total air escape pipe by pipe fitting, and it connects site between the 3rd reduction valve and second gauge, and the pipe fitting of connection the 3rd gas reservoir is provided with the 8th stop valve, described first gas reservoir is connected with vacuum pump, and is connected with total air escape pipe by the second gas output tube, and the second gas output tube is provided with the 4th reduction 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.
2, the gaseous tension of the second structure and flow testing device
This kind of gaseous tension and flow testing device comprise air compressor, blast dryer, supercharger, source of the gas, the first gas reservoir, the second gas reservoir, the 3rd gas reservoir, first-class gauge, second gauge, the first tensimeter, the second tensimeter, data processor, the first gas output tube and the second gas output tube, described first gas reservoir, first-class gauge are connected in series by pipe fitting, 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 gas reservoir and first-class gauge is provided with the second 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 air compressor, blast dryer, supercharger are sequentially connected in series, the gas delivery port of supercharger is connected with the first gas reservoir by pipe fitting, described source of the gas is connected with supercharger by the first gas output tube, and the first gas output tube is provided with the first reduction valve, described second gas reservoir is connected on the pipe fitting between the second reduction valve and first-class gauge by pipe fitting, and the pipe fitting of connection second gas reservoir is provided with the 7th stop valve, described 3rd gas reservoir is connected with total air escape pipe by pipe fitting, and it connects site between the 3rd reduction valve and second gauge, and the pipe fitting of connection the 3rd gas reservoir is provided with the 8th stop valve, described first gas reservoir is connected with vacuum pump, is provided with safety valve, and is connected with total air escape pipe by the second gas output tube, and the second gas output tube is provided with the 4th reduction 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.
3, the gaseous tension of the third structure and flow testing device
This kind of gaseous tension and flow testing device comprise air compressor, blast dryer, supercharger, source of the gas, the first gas reservoir, the second gas reservoir, the 3rd gas reservoir, first-class gauge, second gauge, the first tensimeter, the second tensimeter, data processor, the first gas output tube, the second gas output tube, the 3rd gas output tube and the 4th gas output tube, described first gas reservoir, first-class gauge are connected in series by pipe fitting, 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 gas reservoir and first-class gauge is provided with the second 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 air compressor, blast dryer, supercharger are sequentially connected in series, the gas delivery port of supercharger is connected with the first gas reservoir by pipe fitting, described source of the gas is connected with supercharger by the first gas output tube, first gas output tube is provided with the first reduction valve and the 9th stop valve, first reduction valve is near source of the gas, and the 9th stop valve is near supercharger, one end of described 3rd gas output tube is connected with source of the gas, and its other end is connected with total air escape pipe, and the 3rd gas output tube is provided with the 5th reduction valve, one end of described 4th gas output tube is connected with the first gas output tube, it connects site between the first reduction valve and the 9th stop valve, the other end of the 4th gas output tube is connected on the pipe fitting between the second reduction valve and first-class gauge, and the 4th gas output tube is provided with the tenth stop valve, described second gas reservoir is connected with the 4th gas output tube by pipe fitting, and it connects site after the tenth stop valve, described 3rd gas reservoir is connected with the 3rd gas output tube by pipe fitting, and it connects site after the 5th reduction valve, and the described pipe fitting of connection the 3rd gas output tube and the 3rd gas reservoir is provided with the 8th stop valve, described first gas reservoir is connected with vacuum pump, is provided with safety valve, and is connected with total air escape pipe by the second gas output tube, and the second gas output tube is provided with the 4th reduction 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.
Above-mentioned three kinds of gaseous tensions and flow testing device, its data processor is computing machine or single-chip microcomputer.
Above-mentioned three kinds of gaseous tensions and flow testing device, when carrying out pressing simulation test in gas permeation simulation test and molten chamber, need triaxial compression test machine to coordinate.
The first gas reservoir, the second gas reservoir, the 3rd gas reservoir, first-class gauge, second gauge, the first tensimeter, the second tensimeter that relate in above-mentioned three kinds of gaseous tensions and flow testing device, and air compressor, blast dryer, supercharger all have commercial goods, buy by market.
Gaseous tension of the present invention and flow testing device can be applied in gas permeation simulation test, also can press in simulation test in molten chamber and apply.
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 new proving installation.
2, proving installation 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, proving installation of the present invention can be heated or/and add high pressure to simulation methane gas, solves and add to methane gas the difficult problem that gentleness adds high pressure in gas pressure simulation test.
4, because proving installation 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.
5, proving installation of the present invention arranges and under high pressure, low pressure, can also cause in rock the fracture simulation research forming Fracture Networks under gas circulation change to rock by expansive approach.
Accompanying drawing explanation
Fig. 1 is the first structural representation of gaseous tension of the present invention and flow testing device;
Fig. 2 is the second structural representation of gaseous tension of the present invention and flow testing device;
Fig. 3 is the third structural representation of gaseous tension of the present invention and flow testing device;
Fig. 4 is that the structural representation of triaxial cell in triaxial compression test machine and test specimen are installed and line arrangement schematic diagram;
Fig. 5 is the schematic diagram of pressing simulation test test specimen used in molten chamber.
In figure, 1-air compressor, 2-blast dryer, 3-source of the gas, 4-supercharger, 5-the first gas reservoir, 6-vacuum pump, 7-first-class gauge, 8-the first tensimeter, 9-the second tensimeter, 10-second gauge, 11-data processor, 12-safety valve, 13-the second gas reservoir, 14-the three gas reservoir, 15-triaxial cell, 16-the five reduction valve, 17-the first reduction valve, 18-the second reduction valve, 19-the four reduction valve, 20-the nine stop valve, 21-the ten stop valve, 22-the seven stop valve, 23-the eight stop valve, 24-the first stop valve, 25-the second stop valve, 26-the five stop valve, 27-the six stop valve, 28-the three stop valve, 29-the four stop valve, 30-the three reduction valve, 31-the three gas output tube, 32-the first gas output tube, 33-the four gas output tube, 34-the second gas output tube, 35-total air escape pipe, 36-the first test tube, 37 second test tubes, 38-load column, 39-triaxial pressure chamber enclosure, 40-top loads pressure head, 41-protection glued membrane, 42-gas permeation imitation specimen, 43-bottom loads pressure head, 44-confined pressure pipeline, 45-triaxial cell base, 46-the first pipeline, 47-the second pipeline, simulation test test specimen used is pressed in 48-molten chamber, the center pit of simulation test test specimen used is pressed in 49-molten chamber.
Embodiment
Below by embodiment and by reference to the accompanying drawings the structure of gaseous tension of the present invention and flow testing device and use are described further.
Embodiment 1
In the present embodiment, the structure of gaseous tension and flow testing device as shown in Figure 1, comprise source of the gas 3, first gas reservoir 5, second gas reservoir 13, 3rd gas reservoir 14, first-class gauge 7, second gauge 10, first tensimeter 8, second tensimeter 9, data processor 11, first gas output tube 32, second gas output tube 34, first reduction valve 17, second reduction valve 18, 3rd reduction valve 30, 4th reduction valve 19, first stop valve 24, second stop valve 25, 3rd stop valve 28, 4th stop valve 29, 5th stop valve 26, 6th stop valve 27, 7th stop valve 22, 8th stop valve 23, vacuum pump 6, first test tube 36 and the second test tube 37.Source of the gas 3 is air feed bottle, and its original pressure is 12MPa; First gas reservoir 5 is for being configured with the high temperature high voltage resistant buffer container of Heating system, and the temperature of stored-gas can reach 150 DEG C, and pressure can reach 25MPa; Data processor 11 is computing machine, is provided with the software being shown and store after the gas flow received and gas electric pressure signal being processed.
In the present embodiment, the triaxial compression test type number of use is that MTS815(American MTS company produces).
The operation carrying out gas permeation simulation test with gaseous tension described in the present embodiment and flow testing device and triaxial compression test machine is as follows:
1, the operation of preparatory stage
1. on the sample bench gas permeation imitation specimen 42 being enclosed with protection glued membrane 41 being arranged on the triaxial cell 15 of triaxial compression test machine (as shown in Figure 4), second pipeline 47 of the triaxial cell in triaxial compression test machine is connected by first tensimeter 8 of pipe fitting with gaseous tension described in the present embodiment and flow testing device, first pipeline 46 of the triaxial cell in triaxial compression test machine is connected (as Fig. 1 by pipe fitting with the second tensimeter 9 of gaseous tension described in the present embodiment and flow testing device, shown in Fig. 4), then confined pressure pressure is applied to gas permeation imitation specimen 42,
2. gas permeation imitation specimen 42 is being applied in the process of confined pressure pressure, the second stop valve 25 and the 3rd stop valve 28 is made to be in opening, make the first stop valve 24, 4th stop valve 29, 5th stop valve 26 and the 6th stop valve 27 are in closed condition, whether pressure increases to observe the first tensimeter 8 and the second tensimeter 9, if pressure increases, then show that test specimen protection glued membrane may be damaged, now need to open the 5th stop valve 26 and the 6th stop valve 27 that are connected with tensimeter, 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 15 of triaxial compression test machine is to target confined pressure, the source of the gas 3 in gaseous tension described in the present embodiment and flow testing device, the 3rd reduction valve 30, the 5th stop valve 26 and the 6th stop valve 27 is made to be in closed condition, other all stop valve and reduction valve are all in opening, then start vacuum pump 6 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 6 and all stop valves of having opened and reduction valve;
The operation in 2, gas permeation simulation test stage
1. adjusting the first reduction valve 17 to 8MPa opens this valve, then opens the switch of source of the gas 3, and the methane gas exported after the first reduction valve 17 reduces pressure enters in the first gas reservoir 5 by the first gas output tube 32;
2. when adopting steady state method test, the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26 and the 6th stop valve 27 is kept to be in closed condition, the first stop valve 24, second stop valve 25, the 3rd stop valve 28 and the 4th stop valve 29 is made to be in opening, second reduction valve 18 is adjusted to 3MPa and opens this valve, open the 3rd reduction valve 30, start to test, and start data processor 11 and receive, process and record data;
When carrying out Transient Method test, keep the 5th stop valve 26, 6th stop valve 27 and the 3rd reduction valve 30 are in closed condition, make the 7th stop valve 22, 8th stop valve 23, first stop valve 24 and the 4th stop valve 29 are in opening, second reduction valve 18 is adjusted to 4MPa, 4th reduction valve 19 is adjusted to 7MPa and opens, make the second gas reservoir 13, storing full pressure respectively in 3rd gas reservoir 14 is the methane gas of 4MPa and 7MPa, continue after close the second reduction valve 18 and the 4th reduction valve 19, open the second stop valve 25 and the 3rd stop valve 28 simultaneously, start to test, and start data processor 11 and receive, process and record data.
Carry out in molten chamber, pressing the operation of simulation test as follows with gaseous tension described in the present embodiment and flow testing device and triaxial compression test machine:
1, the operation of preparatory stage
Press imitation specimen 48 to be arranged on the sample bench of triaxial cell 15 of triaxial compression test machine by the molten chamber being enclosed with protection glued membrane 41, other operation with above-mentioned carry out gas permeation simulation test time the preparatory stage operation identical.
2, in molten chamber, the operation of experimental stage intended by pressing mold
1. adjusting the first reduction valve 17 to 9MPa opens this valve, then opens the switch of source of the gas 3, and the gas exported after the first reduction valve 17 reduces pressure enters in the first gas reservoir 5 by the first gas output tube 32;
2. the second reduction valve 18, the 8th stop valve 23, second stop valve 25, the 5th stop valve 26 and the 6th stop valve 27 is kept to be in closed condition, make the 3rd stop valve 28, the 4th stop valve 29 is in opening, regulate the 4th reduction valve 19 to 8MPa and open this valve, the air pressure in triaxial cell 15 in test specimen 48 is made to be retained to schedule time 30min, continue after close the 4th reduction valve 19,3rd reduction valve 30 pressure adjusting opened to 3MPa, the pressure in release test specimen 48 is to 3MPa; Repeat aforesaid operations 30 times;
Or keep the 4th reduction valve 19, the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26 and the 6th stop valve 27 to be in closed condition, the first stop valve 24, second stop valve 25, the 3rd stop valve 28 and the 4th stop valve 29 is made to be in opening, regulate the second reduction valve 18 to 8MPa and open this valve, the air pressure in triaxial cell 15 in test specimen 48 is made to be retained to schedule time 30min, continue after close the second reduction valve 18,3rd reduction valve 30 pressure adjusting opened to 3MPa, the pressure in release test specimen 48 is to 3MPa; Repeat aforesaid operations 30 times;
In test process, start data processor 11 and receive, process and record data.
Embodiment 2
In the present embodiment, the structure of gaseous tension and flow testing device as shown in Figure 2, comprise air compressor 1, blast dryer 2, supercharger 4, source of the gas 3, first gas reservoir 5, second gas reservoir 13, 3rd gas reservoir 14, first-class gauge 7, second gauge 10, first tensimeter 8, second tensimeter 9, data processor 11, first gas output tube 32, second gas output tube 34, first reduction valve 17, second reduction valve 18, 3rd reduction valve 30, 4th reduction valve 19, first stop valve 24, second stop valve 25, 3rd stop valve 28, 4th stop valve 29, 5th stop valve 26, 6th stop valve 27, 7th stop valve 22, 8th stop valve 23, vacuum pump 6, first test tube 36 and the second test tube 37.Source of the gas 3 is air feed bottle, and its original pressure is 12MPa; First gas reservoir 5 is for being configured with the high temperature high voltage resistant buffer container of Heating system, and the temperature of stored-gas can reach 150 DEG C, and pressure can reach 25MPa; Data processor 11 is computing machine, is provided with the software being shown and store after the gas flow received and gas electric pressure signal being processed.
In the present embodiment, the triaxial compression test type number of use is that MTS815(American MTS company produces).
The operation carrying out gas permeation simulation test with gaseous tension described in the present embodiment and flow testing device and triaxial compression test machine is as follows:
1, the operation of preparatory stage
The operation of preparatory stage is identical with the operation of gas permeation simulation test preparatory stage in embodiment 1.
The operation in 2, gas permeation simulation test stage
1. start air compressor 1 pair of air to compress, and the air input air dryer 2 after compression is carried out drying, then the switch of source of the gas 3 is opened, methane gas in source of the gas 3 is inputted supercharger 4 through the first reduction valve 17, is input to after 18MPa being pressurized to methane gas with dried air in the first gas reservoir 5;
Or startup air compressor 1 pair of air compresses, and the air input air dryer 2 after compression is carried out drying, then the switch of source of the gas 3 is opened, methane gas in source of the gas 3 is inputted supercharger 4 through the first reduction valve 17, be input to after 18MPa being pressurized to methane gas with dried air in the first gas reservoir 5, then heat to 120 DEG C to the methane gas after supercharging;
2. when carrying out steady state method penetration testing, the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26, the 6th stop valve 27 is kept to be in closed condition, the first stop valve 24, second stop valve 25, the 3rd stop valve 28, the 4th stop valve 29 is made to be in opening, open after regulating the second reduction valve 18 to 10MPa, open the 3rd reduction valve 30, start to test, and start data processor 11 and receive, process and record data;
When carrying out Transient Method test, keep the 5th stop valve 26, 6th stop valve 27, 3rd reduction valve 30 is in closed condition, make the 7th stop valve 22, 8th stop valve 23, first stop valve 24, 4th stop valve 29 is in opening, regulate the second reduction valve 18 to target seepage pressure 4MPa, 4th reduction valve 19 is to target seepage pressure 8MPa, make the second gas reservoir 13, the methane gas of full 4MPa and 8MPa is stored respectively in 3rd gas reservoir 14, then the second reduction valve 18 is closed, 4th reduction valve 19, open the second stop valve 25 more simultaneously, 3rd stop valve 28, start to test, and start data processor 11 and receive, process and record data.
Carry out in molten chamber, pressing the operation of simulation test as follows with gaseous tension described in the present embodiment and flow testing device and triaxial compression test machine:
1, the operation of preparatory stage
Press imitation specimen 48 to be arranged on the sample bench of triaxial cell 15 of triaxial compression test machine by the molten chamber being enclosed with protection glued membrane 41, other operation with above-mentioned carry out gas permeation simulation test time the preparatory stage operation identical.
2, in molten chamber, the operation of experimental stage intended by pressing mold
1. start air compressor 1 pair of air to compress, and the air input air dryer 2 after compression is carried out drying, then the switch of source of the gas 3 is opened, gas in source of the gas 3 is inputted supercharger 4 through the first reduction valve 17, is input to after 17MPa being pressurized to the gas that source of the gas exports with dried air in the first gas reservoir 5;
Or startup air compressor 1 pair of air compresses, and the air input air dryer 2 after compression is carried out drying, then the switch of source of the gas 3 is opened, gas in source of the gas 3 is inputted supercharger 4 through the first reduction valve 17, be input to after 17MPa being pressurized to the gas that source of the gas exports with dried air in the first gas reservoir 5, then to the gas heating to 120 DEG C after being pressurized to;
2. the second reduction valve 18 and the 8th stop valve 23, second stop valve 25, the 5th stop valve 26, the 6th stop valve 27 is kept to be in closed condition, make the 3rd stop valve 28, the 4th stop valve 29 is in opening, regulate the 4th reduction valve 19 to 14MPa and open, the air pressure in the test specimen 48 in triaxial cell 15 is made to keep reaching schedule time 30min, then the 4th reduction valve 19 is closed, 3rd reduction valve 30 pressure adjusting opened to 6MPa, the pressure in release test specimen 48 is to 6MPa; Repeat aforesaid operations 25 times;
Or keep the 4th reduction valve 19 and the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26, the 6th stop valve 27 to be in closed condition, the first stop valve 24, second stop valve 25, the 3rd stop valve 28, the 4th stop valve 29 is made to be in opening, regulate the second reduction valve 18 to 14MPa and open, the air pressure in the test specimen 48 in triaxial cell 15 is made to keep reaching schedule time 30min, then the second reduction valve 18 is closed, 3rd reduction valve 30 pressure adjusting opened to 6MPa, the pressure in release test specimen 48 is to 6MPa; Repeat aforesaid operations 25 times;
In test process, start data processor 11 and receive, process and record data.
Embodiment 3
In the present embodiment, the structure of gaseous tension and flow testing device as shown in Figure 3, comprise air compressor 1, blast dryer 2, supercharger 4, source of the gas 3, first gas reservoir 5, second gas reservoir 13, 3rd gas reservoir 14, first-class gauge 7, second gauge 10, first tensimeter 8, second tensimeter 9, data processor 11, first gas output tube 32, second gas output tube 34, 3rd gas output tube 31, 4th gas output tube 33, first reduction valve 17, second reduction valve 18, 3rd reduction valve 30, 4th reduction valve 19, 5th reduction valve 16, first stop valve 24, second stop valve 25, 3rd stop valve 28, 4th stop valve 29, 5th stop valve 26, 6th stop valve 27, 7th stop valve 22, 8th stop valve 23, vacuum pump 6, first test tube 36 and the second test tube 37.Source of the gas 3 is air feed bottle, and its original pressure is 12MPa; First gas reservoir 5 is for being configured with the high temperature high voltage resistant buffer container of Heating system, and the temperature of stored-gas can reach 150 DEG C, and pressure can reach 25MPa; Data processor 11 is computing machine, is provided with the software being shown and store after the gas flow received and gas electric pressure signal being processed.
In the present embodiment, the triaxial compression test type number of use is that MTS815(American MTS company produces).
The operation carrying out gas permeation simulation test with gaseous tension described in the present embodiment and flow testing device and triaxial compression test machine is as follows:
1, the operation of preparatory stage
The operation of preparatory stage is identical with the operation of gas permeation simulation test preparatory stage in embodiment 1.
The operation in 2, gas permeation simulation test stage
1. do not start air compressor 1, blast dryer 2 and supercharger 4, keep the 9th stop valve 20, second reduction valve 18 and the 4th reduction valve 19 to be in closed condition;
When carrying out steady state method penetration testing, the 5th reduction valve 16, the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26, the 6th stop valve 27 is kept to be in closed condition, the tenth stop valve 21, first stop valve 24, second stop valve 25, the 3rd stop valve 28, the 4th stop valve 29 is made to be in opening, regulate the first reduction valve 17 to pressure 5MPa, open source of the gas 3 and the 3rd reduction valve 30, start to test, and start data processor 11 and receive, process and record data;
When carrying out Transient Method test, keep the 5th stop valve 26, 6th stop valve 27 and the 3rd reduction valve 30 are in closed condition, make the tenth stop valve 21, 7th stop valve 22, 8th stop valve 23, first stop valve 24, 4th stop valve 29 is in opening, regulate the 5th reduction valve 16 to 3MPa, first reduction valve 17 is to pressure 5MPa and open, then source of the gas 3 is opened, make the second gas reservoir 13, storing full pressure respectively in 3rd gas reservoir 14 is the methane gas of 5MPa and 3MPa, then the 5th reduction valve 16 is closed, first reduction valve 17, open the second stop valve 25 more simultaneously, 3rd stop valve 28, start to test, and start data processor 11 and receive, process and record data,
2. the tenth stop valve 21 and the 5th reduction valve 16 is kept to be in closed condition, start air compressor 1 pair of air to compress, and the air input air dryer 2 after compression is carried out drying, then the switch of source of the gas 3 is opened, methane gas in source of the gas 3 is inputted supercharger 4 through the first reduction valve 17, the 9th stop valve 20, is input to after 15MPa being pressurized to methane gas with dried air in the first gas reservoir 5;
When carrying out steady state method penetration testing, the 4th reduction valve 19, closedown the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26, the 6th stop valve 27 is kept to be in closed condition, the first stop valve 24, second stop valve 25, the 3rd stop valve 28, the 4th stop valve 29 is made to be in opening, regulate the second reduction valve 18 to seepage pressure 6MPa, open the 3rd reduction valve 30, start to test, and start data processor 11 and receive, process and record data;
When carrying out Transient Method test, keep the 5th stop valve 26, 6th stop valve 27 and the 3rd reduction valve 30 are in closed condition, make the 7th stop valve 22, 8th stop valve 23, first stop valve 24, 4th stop valve 29 is in opening, regulate the second reduction valve 18 to target seepage pressure 6MPa, 4th reduction valve 19 is to target seepage pressure 8MPa and open, make the second gas reservoir 13, the gas of full 6MPa and 8MPa is stored respectively in 3rd gas reservoir 14, then the second reduction valve 18 is closed, 4th reduction valve 19, open the second stop valve 25 more simultaneously, 3rd stop valve 28, start to test, and start data processor 11 and receive, process and record data.
3. the tenth stop valve 21 and the 5th reduction valve 16 is kept to be in closed condition, start air compressor 1 pair of air to compress, and the air input air dryer 2 after compression is carried out drying, then the switch of source of the gas 3 is opened, methane gas in source of the gas 3 is inputted supercharger 4 through the first reduction valve 17, the 9th stop valve 20, be input to after 15MPa being pressurized to methane gas with dried air in the first gas reservoir 5, then heat to 100 DEG C again to the air after being pressurized to;
When carrying out steady state method penetration testing, the 4th reduction valve 19, closedown the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26, the 6th stop valve 27 is kept to be in closed condition, the first stop valve 24, second stop valve 25, the 3rd stop valve 28, the 4th stop valve 29 is made to be in opening, regulate the second reduction valve 18 to seepage pressure 6MPa, open the 3rd reduction valve 30, start to test, and start data processor 11 and receive, process and record data;
When carrying out Transient Method test, keep the 5th stop valve 26, 6th stop valve 27 and the 3rd reduction valve 30 are in closed condition, make the 7th stop valve 22, 8th stop valve 23, first stop valve 24, 4th stop valve 29 is in opening, regulate the second reduction valve 18 to target seepage pressure 6MPa, 4th reduction valve 19 is to target seepage pressure 8MPa and open, make the second gas reservoir 13, the gas of full 6MPa and 8MPa is stored respectively in 3rd gas reservoir 14, then the second reduction valve 18 is closed, 4th reduction valve 19, open the second stop valve 25 more simultaneously, 3rd stop valve 28, start to test, and start data processor 11 and receive, process and record data.
Carry out in molten chamber, pressing the operation of simulation test as follows with gaseous tension described in the present embodiment and flow testing device and triaxial compression test machine:
1, the operation of preparatory stage
Press imitation specimen 48 to be arranged on the sample bench of triaxial cell 15 of triaxial compression test machine by the molten chamber being enclosed with protection glued membrane 41, other operation with above-mentioned carry out gas permeation simulation test time the preparatory stage operation identical.
2, in molten chamber, the operation of experimental stage intended by pressing mold
1. do not start air compressor 1, blast dryer 2 and supercharger 4, maintenance the 9th stop valve 20, second reduction valve 18, the 4th reduction valve 19 are in closed condition;
The first reduction valve 17 and the 8th stop valve 23, second stop valve 25, the 5th stop valve 26, the 6th stop valve 27 is kept to be in closed condition, make the 3rd stop valve 28, the 4th stop valve 29 is in opening, regulate the 5th reduction valve 16 to 6MPa, the air pressure in the test specimen 48 in triaxial cell 15 is made to keep reaching schedule time 30min, then the 5th reduction valve 16 is closed, 3rd reduction valve 30 pressure adjusting opened to 3MPa, the pressure in release test specimen 48 is to 3MPa; Repeat aforesaid operations 30 times;
Or keep the 5th reduction valve 16 and the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26, the 6th stop valve 27 to be in closed condition, the tenth stop valve 21, first stop valve 24, second stop valve 25, the 3rd stop valve 28, the 4th stop valve 29 is made to be in opening, regulate the first reduction valve 17 to 6MPa, the air pressure in the test specimen 48 in triaxial cell 15 is made to keep reaching schedule time 30min, then the first reduction valve 17 is closed, 3rd reduction valve 30 pressure adjusting opened to 3MPa, the pressure in release test specimen 48 is to 3MPa; Repeat aforesaid operations 30 times;
In experimentation, start data processor 11 and receive, process and record data.
2. the tenth stop valve 21, the 7th stop valve 22, the 8th stop valve 23 and the 5th reduction valve 16 is kept to be in closed condition, start air compressor 1 pair of air to compress, and the air input air dryer 2 after compression is carried out drying, then the switch of source of the gas 3 is opened, gas in source of the gas 3 is inputted supercharger 4 through the first reduction valve 17, the 9th stop valve 20, is input in the first gas reservoir 5 with dried air to 17MPa to the gas boosting that source of the gas exports;
The second reduction valve 18 and the second stop valve 25, the 5th stop valve 26, the 6th stop valve 27 is kept to be in closed condition, make the 3rd stop valve 28, the 4th stop valve 29 is in opening, regulate the 4th reduction valve 19 to 13MPa, the air pressure in the test specimen 48 in triaxial cell 15 is made to keep reaching schedule time 30min, then the 4th reduction valve 19 is closed, 3rd reduction valve 30 pressure adjusting opened to 6MPa, the pressure in release test specimen 48 is to 6MPa; Repeat aforesaid operations 30 times;
Or keep the 4th reduction valve 19 and the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26, the 6th stop valve 27 to be in closed condition, the first stop valve 24, second stop valve 25, the 3rd stop valve 28, the 4th stop valve 29 is made to be in opening, regulate the second reduction valve 18 to 13MPa, the air pressure in the test specimen 48 in triaxial cell 15 is made to keep reaching schedule time 30min, then the second reduction valve 18 is closed, 3rd reduction valve 30 pressure adjusting opened to 6MPa, the pressure in release test specimen 48 is to 6MPa; Repeat aforesaid operations 30 times;
In experimentation, start data processor 11 and receive, process and record data.
3. the tenth stop valve 21, the 7th stop valve 22, the 8th stop valve 23 and the 5th reduction valve 16 is kept to be in closed condition, start air compressor 1 pair of air to compress, and the air input air dryer 2 after compression is carried out drying, then the switch of source of the gas 3 is opened, gas in source of the gas 3 is inputted supercharger 4 through the first reduction valve 17, the 9th stop valve 20, with dried air, the gas boosting that source of the gas exports is input in the first gas reservoir 5 to 17MPa, and to the gas heating to 60 after supercharging DEG C;
The second reduction valve 18 and the second stop valve 25, the 5th stop valve 26, the 6th stop valve 27 is kept to be in closed condition, make the 3rd stop valve 28, the 4th stop valve 29 is in opening, regulate the 4th reduction valve 19 to 13MPa, the air pressure in the test specimen 48 in triaxial cell 15 is made to keep reaching schedule time 30min, then the 4th reduction valve 19 is closed, 3rd reduction valve 30 pressure adjusting opened to 6MPa, the pressure in release test specimen 48 is to 6MPa; Repeat aforesaid operations 30 times;
Or keep the 4th reduction valve 19 and the 7th stop valve 22, the 8th stop valve 23, the 5th stop valve 26, the 6th stop valve 27 to be in closed condition, the first stop valve 24, second stop valve 25, the 3rd stop valve 28, the 4th stop valve 29 is made to be in opening, regulate the second reduction valve 18 to 13MPa, the air pressure in the test specimen 48 in triaxial cell 15 is made to keep reaching schedule time 30min, then the second reduction valve 18 is closed, 3rd reduction valve 30 pressure adjusting opened to 6MPa, the pressure in release test specimen 48 is to 6MPa; Repeat aforesaid operations 30 times;
In experimentation, start data processor 11 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 (8)
1. gaseous tension and a flow testing device, is characterized in that comprising source of the gas (3), the first gas reservoir (5), the second gas reservoir (13), the 3rd gas reservoir (14), first-class gauge (7), second gauge (10), the first tensimeter (8), the second tensimeter (9), data processor (11), the first gas output tube (32) and the second gas output tube (34);
Described first gas reservoir (5), first-class gauge (7) is connected in series by pipe fitting, described first tensimeter (8) is connected with second pipeline (47) of the triaxial cell (15) in first-class gauge (7) and triaxial compression test machine respectively by pipe fitting, described second tensimeter (9) is connected with first pipeline (46) of the triaxial cell (15) in triaxial compression test machine and second gauge (10) respectively by pipe fitting, second gauge (10) is also connected with total air escape pipe (35), total air escape pipe (35) is provided with the 3rd reduction valve (30),
Pipe fitting between first gas reservoir (5) and first-class gauge (7) is provided with the second reduction valve (18), pipe fitting between first-class gauge (7) and the first tensimeter (8) is provided with the first stop valve (24), pipe fitting between first tensimeter (8) and triaxial cell (15) is provided with the second stop valve (25), pipe fitting between triaxial cell (15) and the second tensimeter (9) is provided with the 3rd stop valve (28), pipe fitting between second tensimeter (9) and second gauge (10) is provided with the 4th stop valve (29), pipe fitting between second stop valve (25) and triaxial cell (15) is connected with the first test tube (36), described first test tube is provided with the 5th stop valve (26), pipe fitting between triaxial cell (15) and the 3rd stop valve (28) is connected with the second test tube (37), described second test tube is provided with the 6th stop valve (27),
Described source of the gas (3) is connected with the first gas reservoir (5) by the first gas output tube (32), the first gas output tube is provided with the first reduction valve (17);
Described second gas reservoir (13) is connected on the pipe fitting between the second reduction valve (18) and first-class gauge (7) by pipe fitting, and the pipe fitting of connection second gas reservoir (13) is provided with the 7th stop valve (22);
Described 3rd gas reservoir (14) is connected with total air escape pipe (35) by pipe fitting, it connects site between the 3rd reduction valve (30) and second gauge (10), and the pipe fitting of connection the 3rd gas reservoir (14) is provided with the 8th stop valve (23);
Described first gas reservoir (5) is connected with vacuum pump (6), and be connected with total air escape pipe (35) by the second gas output tube (34), the second gas output tube (34) is provided with the 4th reduction valve (19);
The interface of described data processor (11) is connected with first-class gauge (7), second gauge (10), the first tensimeter (8), the second tensimeter (9) respectively, is shown and store after the gas flow received and gas electric pressure signal being processed.
2. gaseous tension and a flow testing device, is characterized in that comprising air compressor (1), blast dryer (2), supercharger (4), source of the gas (3), the first gas reservoir (5), the second gas reservoir (13), the 3rd gas reservoir (14), first-class gauge (7), second gauge (10), the first tensimeter (8), the second tensimeter (9), data processor (11), the first gas output tube (32) and the second gas output tube (34);
Described first gas reservoir (5), first-class gauge (7) is connected in series by pipe fitting, described first tensimeter (8) is connected with second pipeline (47) of the triaxial cell (15) in first-class gauge (7) and triaxial compression test machine respectively by pipe fitting, described second tensimeter (9) is connected with first pipeline (46) of the triaxial cell (15) in triaxial compression test machine and second gauge (10) respectively by pipe fitting, second gauge (10) is also connected with total air escape pipe (35), total air escape pipe (35) is provided with the 3rd reduction valve (30),
Pipe fitting between first gas reservoir (5) and first-class gauge (7) is provided with the second reduction valve (18), pipe fitting between first-class gauge (7) and the first tensimeter (8) is provided with the first stop valve (24), pipe fitting between first tensimeter (8) and triaxial cell (15) is provided with the second stop valve (25), pipe fitting between triaxial cell (15) and the second tensimeter (9) is provided with the 3rd stop valve (28), pipe fitting between second tensimeter (9) and second gauge (10) is provided with the 4th stop valve (29), pipe fitting between second stop valve (25) and triaxial cell (15) is connected with the first test tube (36), described first test tube is provided with the 5th stop valve (26), pipe fitting between triaxial cell (15) and the 3rd stop valve (28) is connected with the second test tube (37), described second test tube is provided with the 6th stop valve (27),
Described air compressor (1), blast dryer (2), supercharger (4) are sequentially connected in series, the gas delivery port of supercharger (4) is connected with the first gas reservoir (5) by pipe fitting, described source of the gas (3) is connected with supercharger (4) by the first gas output tube (32), and the first gas output tube is provided with the first reduction valve (17);
Described second gas reservoir (13) is connected on the pipe fitting between the second reduction valve (18) and first-class gauge (7) by pipe fitting, and the pipe fitting of connection second gas reservoir (13) is provided with the 7th stop valve (22);
Described 3rd gas reservoir (14) is connected with total air escape pipe (35) by pipe fitting, it connects site between the 3rd reduction valve (30) and second gauge (10), and the pipe fitting of connection the 3rd gas reservoir (14) is provided with the 8th stop valve (23);
Described first gas reservoir (5) is connected with vacuum pump (6), be provided with safety valve (12), and be connected with total air escape pipe (35) by the second gas output tube (34), the second gas output tube (34) is provided with the 4th reduction valve (19);
The interface of described data processor (11) is connected with first-class gauge (7), second gauge (10), the first tensimeter (8), the second tensimeter (9) respectively, is shown and store after the gas flow received and gas electric pressure signal being processed.
3. a gaseous tension and flow testing device, it is characterized in that comprising air compressor (1), blast dryer (2), supercharger (4), source of the gas (3), first gas reservoir (5), second gas reservoir (13), 3rd gas reservoir (14), first-class gauge (7), second gauge (10), first tensimeter (8), second tensimeter (9), data processor (11), first gas output tube (32), second gas output tube (34), 3rd gas output tube (31) and the 4th gas output tube (33),
Described first gas reservoir (5), first-class gauge (7) is connected in series by pipe fitting, described first tensimeter (8) is connected with second pipeline (47) of the triaxial cell (15) in first-class gauge (7) and triaxial compression test machine respectively by pipe fitting, described second tensimeter (9) is connected with first pipeline (46) of the triaxial cell (15) in triaxial compression test machine and second gauge (10) respectively by pipe fitting, second gauge (10) is also connected with total air escape pipe (35), total air escape pipe (35) is provided with the 3rd reduction valve (30),
Pipe fitting between first gas reservoir (5) and first-class gauge (7) is provided with the second reduction valve (18), pipe fitting between first-class gauge (7) and the first tensimeter (8) is provided with the first stop valve (24), pipe fitting between first tensimeter (8) and triaxial cell (15) is provided with the second stop valve (25), pipe fitting between triaxial cell (15) and the second tensimeter (9) is provided with the 3rd stop valve (28), pipe fitting between second tensimeter (9) and second gauge (10) is provided with the 4th stop valve (29), pipe fitting between second stop valve (25) and triaxial cell (15) is connected with the first test tube (36), described first test tube is provided with the 5th stop valve (26), pipe fitting between triaxial cell (15) and the 3rd stop valve (28) is connected with the second test tube (37), described second test tube is provided with the 6th stop valve (27),
Described air compressor (1), blast dryer (2), supercharger (4) are sequentially connected in series, the gas delivery port of supercharger (4) is connected with the first gas reservoir (5) by pipe fitting, described source of the gas (3) is connected with supercharger (4) by the first gas output tube (32), first gas output tube is provided with the first reduction valve (17) and the 9th stop valve (20), first reduction valve (17) is near source of the gas, and the 9th stop valve (20) is near supercharger;
One end of described 3rd gas output tube (31) is connected with source of the gas (3), and its other end is connected with total air escape pipe (35), and the 3rd gas output tube is provided with the 5th reduction valve (16);
One end of described 4th gas output tube (33) is connected with the first gas output tube (32), it connects site between the first reduction valve (17) and the 9th stop valve (20), the other end of the 4th gas output tube (33) is connected on the pipe fitting between the second reduction valve (18) and first-class gauge (7), and the 4th gas output tube (33) is provided with the tenth stop valve (21);
Described second gas reservoir (13) is connected with the 4th gas output tube (33) by pipe fitting, and it connects site after the tenth stop valve (21);
Described 3rd gas reservoir (14) is connected with the 3rd gas output tube (31) by pipe fitting, it connects site after the 5th reduction valve (16), and the described pipe fitting of connection the 3rd gas output tube and the 3rd gas reservoir (14) is provided with the 8th stop valve (23);
Described first gas reservoir (5) is connected with vacuum pump (6), be provided with safety valve (12), and be connected with total air escape pipe (35) by the second gas output tube (34), the second gas output tube (34) is provided with the 4th reduction valve (19);
The interface of described data processor (11) is connected with first-class gauge (7), second gauge (10), the first tensimeter (8), the second tensimeter (9) respectively, is shown and store after the gas flow received and gas electric pressure signal being processed.
4. a kind of gaseous tension and flow testing device according to claim arbitrary in claims 1 to 3, is characterized in that described data processor (11) is for computing machine or single-chip microcomputer.
5. a kind of gaseous tension described in arbitrary claim and the application of flow testing device in gas permeation simulation test in claims 1 to 3.
6. a kind of gaseous tension described in claim 4 and the application of flow testing device in gas permeation simulation test.
7. in claims 1 to 3, a kind of gaseous tension described in arbitrary claim and flow testing device press the application in simulation test in molten chamber.
8. a kind of gaseous tension described in claim 4 and flow testing device press the application in simulation test in molten chamber.
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| CN104374684B (en) * | 2014-11-07 | 2017-04-19 | 四川大学 | System for testing permeability of unloading coal and rock mass in mining process and application thereof |
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| CN104949791B (en) * | 2015-06-23 | 2017-06-27 | 江苏大学 | A kind of balanced type gas pressure pressure testing method and device |
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