CN110530771A - Pressure chamber is used in the test of coal petrography sample gas flow - Google Patents

Pressure chamber is used in the test of coal petrography sample gas flow Download PDF

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Publication number
CN110530771A
CN110530771A CN201910824244.4A CN201910824244A CN110530771A CN 110530771 A CN110530771 A CN 110530771A CN 201910824244 A CN201910824244 A CN 201910824244A CN 110530771 A CN110530771 A CN 110530771A
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CN
China
Prior art keywords
pressure
pressing sleeve
circumferential
round steel
steel cylinder
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CN201910824244.4A
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Chinese (zh)
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CN110530771B (en
Inventor
张东明
王浩
郑东
张邦安
蒋志刚
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重庆大学
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3236Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
    • G01M3/3272Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082Investigating permeability by forcing a fluid through a sample
    • G01N15/0826Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change

Abstract

The invention discloses a kind of coal petrography sample gas flow test pressure chambers, including round steel cylinder, circumferential pressure transmitting set, T-type end socket, PEEK set, taper steel bushing, right piston set, right first pressing sleeve, right second pressing sleeve, left first pressing sleeve, left second pressing sleeve, cylindrical coal petrography sample chamber is formed between circumferential pressure transmitting set, two T-type end sockets, circumferential pressure is formed between circumferential pressure transmitting set and round steel cylinder and applies chamber;Setting is there are two circumferential high pressure liquid interface on the side wall of the round steel cylinder, and setting is each provided with a seepage flow high pressure gas and Instrument Measuring Resistivity of Carbon Products PEEK insulating joint shared interface on two T-type end sockets there are two axial high pressure liquid interface on the side wall of right second pressing sleeve.This experimental rig can gas flow situation of the truer simulation coal petrography sample under different pressures, different temperatures and the underground underground Bo Deng real conditions, make test result have higher practical guided significance, to coal rock layer safe working provide reliable guarantee.

Description

Pressure chamber is used in the test of coal petrography sample gas flow

Technical field

The invention belongs to coal petrography sample gas flow technical field of test equipment, and in particular to one kind is for carrying out coal petrography sample The pressure chamber structure of gas flow test.

Background technique

Gas flow refers to flowing of the gas in porous media.The difference of the essence of gas flow and liquid seepage is Gas has biggish compressibility, and in flow event, volume changes with temperature and pressure.Now currently, in laboratory, Test piece box is commonly used to simulate seepage tests of the various gases in coal petrography sample (general designation of " coal sample " and " rock sample "), but existing examination Part case experimental condition is also relatively limited, can not real simulation coal petrography sample in factors such as different pressures, different temperatures and underground waves Under the influence of underground real conditions.

Summary of the invention

The limitation of seepage tests of the various gases in coal petrography sample is simulated for now current test piece box, the present invention is quasi- to be provided A kind of pressure chamber being exclusively used in coal petrography sample penetration test test, can truer simulation coal petrography sample in different pressures, difference Gas flow situation at temperature and the underground underground Bo Deng real conditions.

For this purpose, the technical scheme adopted by the invention is as follows: a kind of coal petrography sample gas flow test pressure chamber, including round steel Cylinder further includes circumferential pressure transmitting set, T-type end socket, PEEK set, taper steel bushing, right piston set, right first pressing sleeve, the second pressure of the right side Set, left first pressing sleeve, left second pressing sleeve, the circumferential pressure transmitting are placed in round steel cylinder, the outer diameter of circumferential pressure transmitting set Less than the internal diameter of round steel cylinder, two described T-type end sockets or so compartment of terrain is opposite to be mounted in circumferential pressure transmitting set, each T-type The bar portion of end socket is respectively set with the PEEK set, and the left and right ends portion diameter of circumferential pressure transmitting set becomes larger and passes through taper Steel bushing combination Sealing shield ring pushes against sealing, to form cylindrical coal petrography between circumferential pressure transmitting set, two T-type end sockets Sample chamber transmits in circumferential pressure and forms circumferential pressure application chamber between set and round steel cylinder;Left first pressing sleeve is screwed onto round steel The left end of cylinder and after being pushed against the taper steel bushing in left side, the front end of left second pressing sleeve is screwed onto left first pressing sleeve and passes through After circumferential cushion block is pushed against the PEEK set in left side;Right first pressing sleeve is screwed onto the right end of round steel cylinder and is pushed against the cone on right side After shape steel bushing, right second pressing sleeve is installed in the rear of right first pressing sleeve, and right piston set is after right second pressing sleeve, right first pressing sleeve After being pushed against the PEEK set on right side, the middle part of right piston set is provided with circumferential protrusion and can be in the large diameter section of right second pressing sleeve It horizontally slips, the interface of right second pressing sleeve size internal diameter section moves to right termination confined planes as what right piston covered;

Setting is provided with two on the side wall of right second pressing sleeve there are two circumferential high pressure liquid interface on the side wall of the round steel cylinder A axial direction high pressure liquid interface is each provided with a seepage flow high pressure gas and Instrument Measuring Resistivity of Carbon Products PEEK insulation on two T-type end sockets Connector shared interface.

It is provided with circumferential pressure sensor mounting hole on the side wall of the round steel cylinder as a preferred embodiment of the above solution, right the Axial compressive force sensor mounting hole is provided on the side wall of two pressing sleeves, and axial compressive force sensor mounting hole connects with axial high pressure liquid Mouth is located at the left and right sides of circumferential protrusion;Part is scabbled as supersonic generator in the middle part of the lateral wall of the round steel cylinder Mounting platform, the left end entrance of the pressure chamber is connected with vibrator.Pressure chamber's coal is detected by circumferential pressure sensor The circumferential pressure of rock sample, axial compressive force sensor are used for the axial compressive force of measuring pressure room coal petrography sample, the position of pressure acquisition point setting It sets and can ensure that acquisition data are really reasonable;Supersonic generator is added, high pressure gas seepage flow tries under the conditions of can carrying out different sound waves It tests, influence of the gas flow to coal petrography sample micro-crack under the conditions of analog ultrasonic wave;Vibrator is added, using air as power Influence of the gas flow to coal petrography sample macroscopic view crack under the conditions of wave is differently descended in source, simulation, the lateral wave that vibrator generates and vibration Width is big, such as 10HZ or so, for simulating underground wave to macroscopical crack of coal petrography sample;Pass through Optimization for Ultrasonic Wave generator and vibration The position of device makes test result closer descend real conditions for simulating the coupling of both direction.

Further preferably, seepage flow high-pressure gas pipe, the high-pressure liquid tube being connected with the pressure chamber are hose, pressure chamber It is placed in tepidarium.Water temperature can be according to circumstances adjusted, gas flow under different temperatures is carried out and tests.

Further preferably, the left end of the pressure chamber is sequentially connected pressure sensor, high pressure valve, titanium dioxide by pipeline The right end of carbon gas source, pressure chamber is connected with pressure sensor, high pressure valve, desiccant and gas flowmeter in turn by pipeline, uses In the effect test for carrying out gas with various pressure carbon dioxide displacement methane.

Further preferably, it is provided with stabilizer blade below the round steel cylinder, convenient for operation and observation.

Beneficial effects of the present invention: this experimental rig can truer simulation coal petrography sample in different pressures, different temperatures And the gas flow situation under the real conditions of the underground underground Bo Deng, make test result that there is higher practical guided significance, it is right Coal rock layer safe working provides reliable guarantee.

Detailed description of the invention

Fig. 1 is the structural diagram of the present invention.

Fig. 2 is the present invention for carrying out the state of gas with various pressure carbon dioxide displacement methane.

Specific embodiment

By way of example and in conjunction with the accompanying drawings, the invention will be further described:

As shown in Figure 1, Figure 2, a kind of coal petrography sample gas flow test pressure chamber, mainly by round steel cylinder 1, circumferential pressure Transmitting set 2, T-type end socket 3, PEEK set 4, taper steel bushing 5, right piston set 6, right first pressing sleeve 7, right second pressing sleeve 8, a left side first are pressed Set 9, left second pressing sleeve 10, circumferential cushion block 11, Sealing shield ring 12, stabilizer blade 13, pressure sensor 14, high pressure valve 15, carbon dioxide Gas source 16, desiccant 17, gas flowmeter 18, vibrator 19, supersonic generator 20 form.

Circumferential pressure transmitting set 2 is placed in round steel cylinder 1, and the outer diameter of circumferential pressure transmitting set 2 is less than the internal diameter of round steel cylinder 1. Two 3 or so compartment of terrain of T-type end socket are opposite to be mounted in circumferential pressure transmitting set 2, and the stub end of two T-type end sockets 3 is opposite, often The bar portion of a T-type end socket 3 is respectively set with a PEEK set 4.The left and right ends portion diameter of circumferential pressure transmitting set 2 becomes larger and passes through Taper steel bushing 5 combines Sealing shield ring 12 to push against sealing, forms circle between 2, two T-type end sockets 3 of set to transmit in circumferential pressure Cylindrical coal petrography sample chamber A forms circumferential pressure between circumferential pressure transmitting set 2 and round steel cylinder 1 and applies chamber B.Coal petrography sample chamber A and It is seal cavity that circumferential pressure, which applies chamber B, and coal petrography sample chamber A is used to place cylindrical coal sample or rock sample, and circumferential pressure applies Chamber B is used to apply coal sample or rock sample circumferential pressure, and circumferential pressure transmitting set 2 uses rubber material, can deform pressure.

After left first pressing sleeve 9 is screwed onto the left end of round steel cylinder 1 and is pushed against the taper steel bushing 5 in left side, left second pressing sleeve 10 Front end be screwed onto the first pressing sleeve 9 of a left side and be pushed against the PEEK set 4 in left side by circumferential cushion block 11 after.

After right first pressing sleeve 7 is screwed onto the right end of round steel cylinder 1 and is pushed against the taper steel bushing 5 on right side, right second pressing sleeve 8 is solid It is located at the rear of right first pressing sleeve 7, right piston set 6 is pushed against the PEEK on right side after right second pressing sleeve 8, right first pressing sleeve 7 After set 4.Right second pressing sleeve 8 divides for large diameter section and small internal diameter section, and the middle part of right piston set 6 is provided with circumferential direction protrusion 6a and can be It horizontally slips in the large diameter section of right second pressing sleeve 8, the interface of 8 size internal diameter section of right second pressing sleeve is as right piston set 6 Termination confined planes are moved to right, right piston set 6 moves to right until when being against the interface of size internal diameter section.

There are two circumferential high pressure liquid interface a, one-in-and-one-out to apply in chamber B for circumferential pressure for setting on the side wall of round steel cylinder 1 Highly pressurised liquid is injected, and 2 pairs of coal petrography samples are covered by circumferential pressure transmitting and apply circumferential pressure, is also used for filling the water detection before the test Testing equipment is with the presence or absence of leakage.On the side wall of right second pressing sleeve 8 setting there are two axial high pressure liquid interface b (one of them not Show), one-in-and-one-out, the small internal diameter section for the second pressing sleeve 8 to the right injects highly pressurised liquid, and covers 6 pairs of coal petrographys by right piston Sample applies axial compressive force.It is each provided with a seepage flow high pressure gas on two T-type end sockets 3 and Instrument Measuring Resistivity of Carbon Products PEEK insulation connects Head shared interface d, can be as the interface of Instrument Measuring Resistivity of Carbon Products PEEK insulating joint and inserting as seepage flow high pressure gas Interface first carries out Gas seepage test, removes the connection-peg of high pressure gas after the completion, loads onto Instrument Measuring Resistivity of Carbon Products PEEK insulation and connects Head can carry out determination of resistivity.Instrument Measuring Resistivity of Carbon Products can be selected brand " Tonghui ", model TH2810D, exhausted with 4 PEEK Edge connector, wherein 2 PEEK insulating joints are ability spare, that satisfaction measures in a high voltage state.

Circumferential pressure sensor mounting hole c is provided on the side wall of round steel cylinder 1;It is provided on the side wall of right second pressing sleeve 8 Axial compressive force sensor mounting hole d, axial compressive force sensor mounting hole d and axial direction high pressure liquid interface b are located at circumferential protrusion The left and right sides of 6a.Mounting platform as supersonic generator 20, pressure chamber are scabbled in part in the middle part of the lateral wall of round steel cylinder 1 Left end entrance be connected with vibrator 19.

Preferably, seepage flow high-pressure gas pipe, the high-pressure liquid tube being connected with pressure chamber are hose, and pressure chamber is placed in tepidarium In, to provide suitable environment temperature.

In addition, the left end of pressure chamber is sequentially connected pressure sensor 14, high pressure valve 15, carbon dioxide air source by pipeline 16, the right end of pressure chamber is connected with pressure sensor 14, high pressure valve 15, desiccant 17 and gas flowmeter in turn by pipeline 18.For carrying out the effect test of gas with various pressure carbon dioxide displacement methane.The lower section of round steel cylinder 1 is provided with stabilizer blade 13.Four kinds of methane, nitrogen, carbon dioxide or hydrogen sulfide gases can be used in seepage tests.

Claims (5)

1. a kind of coal petrography sample gas flow test pressure chamber, including round steel cylinder (1), it is characterised in that: further include circumferential pressure Transmitting set (2), T-type end socket (3), PEEK set (4), taper steel bushing (5), right piston set (6), right first pressing sleeve (7), the right side second are pressed (8), left first pressing sleeve (9), left second pressing sleeve (10) are covered, the circumferential pressure transmitting set (2) is placed in round steel cylinder (1), circumferential The outer diameter of pressure transmitting set (2) is less than the internal diameter of round steel cylinder (1), and two T-type end socket (3) left and right compartment of terrain are opposite to be mounted on In circumferential pressure transmitting set (2), the bar portion of each T-type end socket (3) is respectively set with the PEEK set (4), and circumferential pressure passes The left and right ends portion diameter for passing set (2), which becomes larger and passes through taper steel bushing (5), pushes against sealing in conjunction with Sealing shield ring (12), thus in ring It is transmitted to pressure and forms cylindrical coal petrography sample chamber (A) between set (2), two T-type end sockets (3), transmit set (2) in circumferential pressure Circumferential pressure is formed between round steel cylinder (1) applies chamber (B);Left first pressing sleeve (9) is screwed onto the left end of round steel cylinder (1) simultaneously After being pushed against the taper steel bushing (5) in left side, the front end of left second pressing sleeve (10) is screwed onto left first pressing sleeve (9) and passes through After circumferential cushion block (11) is pushed against the PEEK set (4) in left side;Right first pressing sleeve (7) is screwed onto the right end of round steel cylinder (1) simultaneously After being pushed against the taper steel bushing (5) on right side, right second pressing sleeve (8) is installed in the rear of right first pressing sleeve (7), right piston set (6) After being pushed against the PEEK set (4) on right side after right second pressing sleeve (8), right first pressing sleeve (7), right piston set is set in the middle part of (6) It is equipped with circumferential raised (6a) and can horizontally slip in the large diameter section of right second pressing sleeve (8), right second pressing sleeve (8) size internal diameter The interface of section moves to right termination confined planes as right piston set (6);
It is arranged on the side wall of the round steel cylinder (1) there are two circumferential direction high pressure liquid interface (a), is set on the side wall of right second pressing sleeve (8) It sets there are two axial high pressure liquid interface (b), is each provided with a seepage flow high pressure gas on two T-type end sockets (3) and resistivity is surveyed Determine instrument PEEK insulating joint shared interface (d).
2. coal petrography sample gas flow test described in accordance with the claim 1 pressure chamber, it is characterised in that: the round steel cylinder (1) Side wall on be provided with circumferential pressure sensor mounting hole (c), axial compressive force sensing is provided on the side wall of right second pressing sleeve (8) Device mounting hole (d), and axial compressive force sensor mounting hole (d) and axial high pressure liquid interface (b) are located at circumferential raised (6a) The left and right sides;Mounting platform as supersonic generator (20) is scabbled in part in the middle part of the lateral wall of the round steel cylinder (1), The left end entrance of the pressure chamber is connected with vibrator (19).
3. coal petrography sample gas flow test described in accordance with the claim 1 pressure chamber, it is characterised in that: with pressure chamber's phase Seepage flow high-pressure gas pipe even, high-pressure liquid tube are hose, and pressure chamber is placed in tepidarium.
4. coal petrography sample gas flow test described in accordance with the claim 1 pressure chamber, it is characterised in that: a left side for the pressure chamber End is sequentially connected pressure sensor (14), high pressure valve (15), carbon dioxide air source (16) by pipeline, and the right end of pressure chamber passes through Pipeline is connected with pressure sensor (14), high pressure valve (15), desiccant (17) and gas flowmeter (18) in turn.
5. coal petrography sample gas flow test described in accordance with the claim 1 pressure chamber, it is characterised in that: the round steel cylinder (1) Lower section be provided with stabilizer blade (13).
CN201910824244.4A 2019-09-02 2019-09-02 Pressure chamber for coal rock sample gas seepage test CN110530771B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110927045A (en) * 2019-12-25 2020-03-27 重庆大学 Long coal petrography sample gas-liquid seepage pressure chamber
CN111007100A (en) * 2019-12-25 2020-04-14 重庆大学 Long coal rock sample solid-gas coupling adsorption expansion test system

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Publication number Priority date Publication date Assignee Title
CN101446542A (en) * 2008-12-15 2009-06-03 南通市飞宇石油科技开发有限公司 Triaxial core holder
US20130276554A1 (en) * 2012-04-24 2013-10-24 Halliburton Energy Services, Inc. Multi-Fluid Injector Core Holder
CN104048982A (en) * 2014-06-30 2014-09-17 中国科学院武汉岩土力学研究所 Multifunctional rock core holder for rock core scale nuclear magnetic resonance test
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110927045A (en) * 2019-12-25 2020-03-27 重庆大学 Long coal petrography sample gas-liquid seepage pressure chamber
CN111007100A (en) * 2019-12-25 2020-04-14 重庆大学 Long coal rock sample solid-gas coupling adsorption expansion test system
CN110927045B (en) * 2019-12-25 2020-09-25 重庆大学 Long coal petrography sample gas-liquid seepage pressure chamber
CN111007100B (en) * 2019-12-25 2020-11-13 重庆大学 Long coal rock sample solid-gas coupling adsorption expansion test system

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