CN101634621A - Fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal - Google Patents
Fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal Download PDFInfo
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- CN101634621A CN101634621A CN200910104608A CN200910104608A CN101634621A CN 101634621 A CN101634621 A CN 101634621A CN 200910104608 A CN200910104608 A CN 200910104608A CN 200910104608 A CN200910104608 A CN 200910104608A CN 101634621 A CN101634621 A CN 101634621A
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Abstract
The invention discloses a fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal, comprising a lifting stand, a hydraulic servo control system, an axial loading device mounted at the top of the lifting stand and a triaxial pressure chamber connected with the lower end of the axial loading device. A thermostatic water tank is arranged below the triaxial pressure chamber; a movable worktable is arranged above the thermostatic water tank; the lower end of the triaxial pressure chamber is arranged on the movable worktable; heating tubes are arranged in the thermostatic water tank; and a water inlet valve, a water drain valve and a water-bath circulating water pump are arranged outside the thermostatic water tank and are communicated with the thermostatic water tank. In the hydraulic servo control system, an axial compression loading oil pump is communicated with an oil inlet and an oil outlet by a pipeline, and a peripheral compression loading oil pump is communicated with an oil intake/drain hole by a pipeline. The fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal can carry out the research of gas-contained coal percolation tests in states, such as different terrestrial stresses, different gas pressures, different temperatures, and the like and the distortion and failure characteristics of the gas-contained coal in a percolation process.
Description
Technical field:
The invention belongs to the test unit field, especially relate to a kind of solid coupled three-shaft servo seepage apparatus of the coal containing methane gas hot-fluid that the coal containing methane gas seepage tests are studied and the deformation failure feature of coal containing methane gas in flow event studied that can be under states such as stress, different gas pressure, different temperatures differently.
Technical background:
In the mine production run, mining operation has been destroyed the balance of initial stress field and the balance of original gas pressure, has formed the stress redistribution and the Gas Flow of digging surrounding rock body.Coal-bed gas (coal-seam gas) permeability is the physical parameter of gas seepage flow complexity in the reflection coal seam, it also is the important parameter of gas permeation fluid mechanics and engineering, contraction, coal seam buried depth, coal body structure and the earth electric field etc. of itself and cracks in coal seam development characteristics, tectonic structure, terrestrial stress state, gas pressure, ground temperature, matrix of coal are closely related, and the size of coal seam permeability plays an important role to the distribution of the storage of gas and discharging, gas pressure, coal and gas outstanding again with important the getting in touch that be distributed with of the discharging of gas and pressure.Therefore, the research of the measuring method of coal-bed gas permeability or Gas Permeation Coefficients of Coal Seams is the gordian technique of gas permeation fluid mechanics development, also is that the key of a series of mine safety problems such as the mine safety worker studies coal and gas is outstanding, gas explosion is started with a little; The basic law of research coal-bed gas migration, Gas Flow is theoretical to have great significance with control gas disaster for improving.
Coal seam reservoirs is the dual structure model that a cover is made up of natural crack and matrix pores, fissure system is the passage of coal-bed methane seepage migration, reservoir permeability is except that being subjected to the control of self cranny development feature, the contraction of tectonic structure, terrestrial stress state, gas pressure, ground temperature, matrix of coal, coal seam buried depth, coal body structure and electric field etc. all affect the coal seam permeability to some extent, and the evolution of permeability is the result of above-mentioned variant factors effect.
Abroad, just there is the scholar to obtain some achievements in research: W.J.Sommerton etc. as far back as 20th century 70, the eighties and studied stress the infiltrative influence of coal body by relevant seepage flow experimental facilities; C.R.McKee etc. have carried out the research that concerns between stress and coal body factor of porosity and the permeability; Harpalani research has obtained the influence rule of stress to coal desorb seepage flow; J.R.E.Enever and A.Henning research have obtained the influence rule of coal body effective stress to permeability.In addition, big tomb one hero, the clear will of Gutter mouth, P.G. Sai Wensite, many top grades have also been done work in various degree in this respect suddenly.
At home, be to measure the coefficient of diffusion of loose coal grain and the permeability of small sized pieces coal sample (about 2cm) at normal temperatures and pressures in early days, develop into subsequently and under three of vacations or true three confining pressure effects, measure the variation of coal sample permeability with stress, the permeability fit equation that is loaded and unload.The eighties in 20th century, all generation peace woods Bai Quan of China Mining University utilize homemade coal sample gas permeation experimental provision to study the coal containing methane gas body under the constant prerequisite of confined pressure power earlier, relation between pore pressure and permeability and pore pressure and coal sample distortion, also studied simultaneously under the certain condition of pore pressure, relation between permeability and confined pressure power and coal sample distortion, drawn under the constant prerequisite of confined pressure power, the relation between pore pressure and permeability and coal sample deformation values is obeyed indicial equation basically; Under the pore pressure permanence condition, during loading, the available negative exponent The Representation Equation of the permeability of coal body and the relation between load, and when unloading, available power function equation is represented, enter the nineties, Peng serves as etc. and to have developed STCY-80 moulded coal and rock permeability analyzer again, and the permeability of the various lithology samples of coal measure strata is studied.
Since the nineties in 20th century, the bright academic team of learning good fortune professor leader of University Of Chongqing utilizes homemade seepage apparatus, successively to coal sample under different stress, not under the same electric field, under the different temperatures and the permeability in the deformation process study, drawn the relation between coal sample permeability and effective stress, temperature and the electric field intensity etc.1996, the Zhaoyang of Shanxi Mining Inst. (existing Institutes Of Technology Of Taiyuan) rises developed " the coal petrography permeability test machine " and " triaxial stress permeameter " that wait, carried out the experimental study of coal body gas permeation rule under the triaxiality effect, drawn coal body gas permeation coefficient and decayed, pressed with hole to be the conclusion that parabolic type changes with the increase of volume stress.Calendar year 2001, utilizations such as seepage flow fluid mechanics research institute of Chinese Academy of Sciences Liu Jianjun self-control experimental facilities is research object with the LOW PERMEABILITY POROUS MEDIA, draw factor of porosity, permeability by experiment with the effective pressure change curve, it studies show that, fluid is in LOW PERMEABILITY POROUS MEDIA during seepage flow, the solid coupling effect of stream is very remarkable, this is because the hole of LOW PERMEABILITY POROUS MEDIA is very little, and the subtle change of factor of porosity, the capital produces big influence to permeability, so the permeability of least permeable medium is fairly obvious with the variation of effective stress.2006, this permeameter of three bearing shells has been made on Pan of Liaoning Project Technology University one mountain etc. by oneself, unload, carry out continuously coal-seam gas desorb seepage tests by loading afterwards earlier, simulate the tax of coal-seam gas under the intricately stress condition recovery process of depositing and migrate, obtained the relation between effective stress and coal-seam gas desorb and seepage characteristic.2008, developments " gas permeation instrument " voluntarily such as Coal Scientific Research Institute Chongqing Institute grand Clear and Bright, carried out hole air pressure coal body has been permeated sex experimental study, the method and the process of coal perviousness experiment under the control pore air pressure have been set forth, studies show that it is to be caused due to slippage effect and the pore texture variation itself by the hole air pressure change that the permeability of coal increases the characteristic reduce with hole air pressure.The same year, the new grade of the neat celebrating of China Coal Research Institute utilized a kind of clamping device again, by experimental study the different scale coal sample add in confined pressure, the permeability variation under the unloading condition, test findings is carried out the nonlinear fitting analysis, draw and have the negative exponent relation between the permeability of coal sample and the confined pressure, the coal sample permeability exists scale effect to confined pressure susceptibility.
The seepage experimental apparatus of the designed exploitation of above constituent parts, though the understanding that has advanced the research of permeation fluid mechanics to a certain extent and deepened the coal-bed gas migration mechanism, but more or less also come with some shortcomings: 1, the permeability influence factor considered of above several experimental provision is relatively single, the neither one device is taken all factors into consideration stress, gas pressure, temperature effect and deformation monitoring etc., therefore, the test of the being carried out residing environment of the actual coal-bed gas seepage flow of simulated field fully; 2, the applied force loading system of answering mostly is manually, and therefore, the stress loading procedure can not remain a constant speed, and its precision can not guarantee, in addition, can not realize such as loading forms such as cyclic loads; 3, gas charging system mostly is an inflation, and is promptly inhomogeneous in the place inflation that pressure head contacts with test specimen, brings methane gas not flow through from test specimen equably thus, and therefore, the mensuration of gas flow must have certain error, causes permeability to calculate out of true; 4, foil gauge is mostly adopted in the coal rock deformation monitoring, and the coal rock deformation data are accurate inadequately, particularly radial deformation; 5, the mensuration of gas flow mostly is drainage, the situation that gas leaks and reading is inaccurate is arranged unavoidably, and measuring process is loaded down with trivial details; 6, respectively install installation process basically by manual carrying, be inconvenient to operate.
Summary of the invention:
The purpose of this invention is to provide a kind of under states such as stress, different gas pressure, different temperatures differently the research of coal containing methane gas seepage tests and the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid of the deformation failure The Characteristics of coal containing methane gas in flow event.
For achieving the above object, technical scheme of the present invention is: design the solid coupled three-shaft servo seepage apparatus of a kind of coal containing methane gas hot-fluid, comprise elevator platform, hydraulic servo control system, be installed in the axial charger at elevator platform top and be arranged on the triaxial cell that the elevator platform middle part is connected axial charger lower end, its key is: be provided with constant temperature water tank below described triaxial cell, be provided with movable table in this constant temperature water tank, lower end, described triaxial cell is placed on the described movable table;
Be provided with heating tube in described constant temperature water tank, this constant temperature water tank is connected with pipeline, and is provided with water intaking valve and draining valve on this pipeline, is provided with the water-bath water circulating pump that communicates with constant temperature water tank outside this constant temperature water tank;
Described triaxial cell comprises the seat of honour and following, be provided with the test cavity that Open Side Down in the described seat of honour, axially have through hole on the seat of honour of this test cavity top, described following axially has step through-hole, the described seat of honour is installed in down on the seat, be respectively equipped with the drain hole that communicates with described test cavity and advance oil drain out on the described seat of honour and following, kink has the pressurizing piston bar in the axially extending bore at the described seat of honour, and this pressurizing piston bar bottom is stretched in the described test cavity; Be provided with the air inlet through hole on described pressurizing piston bar axial line, be provided with inlet chamber in this pressurizing piston bar bottom, this inlet chamber communicates with described test cavity by the air inlet bee-hole; In a described following axially extending bore, be equipped with described pressurizing piston bar over against back shaft, on described back shaft axial line, be provided with exhaust hole, be provided with discharge chamber in this back shaft upper end, this discharge chamber communicates with test cavity by the exhaust bee-hole; In described test cavity, be provided with guide piece, this guide piece is made up of the following centering disk and the last centering disk above guide spiro rod is installed in this time centering disk that are installed in down on the seat, described center of going up centering disk and following centering disk has circular hole, the described back shaft warp center hole of centering disk down stretches out, and the circular hole of described pressurizing piston bar bottom through last centering disk center stretches into the middle and upper part of described test cavity; Be provided with the sensor connector lug on following in described test cavity, this sensor connector lug passes described following and links to each other with data acquisition system (DAS) through data line;
Described axial charger comprises entablature, the column and the seat of honour, the upper and lower side that the described entablature and the seat of honour are separately fixed at column forms framed structure, on described entablature, displacement transducer is housed, below this entablature, hydraulic cylinder is installed, described hydraulic cylinder is provided with oil-in and oil-out, upper piston rod upper end in this hydraulic cylinder is passed entablature and is contacted with the gauge head of described displacement transducer lower end, lower piston rod lower end in this hydraulic cylinder is connected with pressure transducer, described pressure transducer links to each other with control system through data line, is connected with the ball-type pressure head in this pressure transducer lower end;
Described hydraulic servo control system comprises that axial compression loads oil pump and confined pressure loads oil pump, and described axial compression loads oil pump and is connected with described oil-in and oil-out by pipeline, described confined pressure loading oil pump by pipeline with advance oil drain out and communicate.
The present invention is designed to the air inlet bee-hole with pressurizing piston bar lower end, the back shaft upper end is designed to the exhaust bee-hole, so when test specimen being placed between back shaft and the pressurizing piston bar, the ventilation back is because the existence of air inlet bee-hole, making gas enter test specimen is that face enters, so air permeable effect is better, and the test specimen permeability survey is more accurate.
In described test cavity, be provided with guide piece, this guide piece is made up of the following centering disk and the last centering disk above guide spiro rod is installed in this time centering disk that are installed in down on the seat, described center of going up centering disk and following centering disk has circular hole, the described back shaft warp center hole of centering disk down stretches out, and the circular hole of described pressurizing piston bar bottom through last centering disk center stretches into the middle and upper part of described test cavity.The present invention is provided with guide piece in test cavity, have 2 advantages so at least: the first can lead to the seat of honour, can allow the seat of honour carry out good contraposition with following; It two is that the central opening of going up centering disk and following centering disk can lead to pressurizing piston bar and back shaft well, and the contraposition of realization pressurizing piston bar and back shaft makes that the test specimen pressure is more even.
Be provided with the sensor connector lug on following in described test cavity, this sensor connector lug links to each other with data acquisition system (DAS) through data line, therefore can effectively measure the circumferential deformation of circumferential pressure in the test cavity and test specimen.
The present invention adopts hydraulic cylinder to carry out pressure-loaded, therefore loading procedure is steady, on entablature, be equipped with hydraulic cylinder in upper piston rod on the displacement transducer of end in contact, so in loading procedure, described displacement transducer can be prepared detects the both axial displacement of test specimen of the axially movable distance of upper piston rod; Between lower piston rod and pressure head, be provided with pressure transducer, in loading procedure, this pressure transducer can be prepared detects the pressure size that is loaded, and the accurate detection of above data can guarantee the degree of accuracy of the solid coupled three-shaft servo data that seepage tests are surveyed of coal containing methane gas hot-fluid.
The present invention adopts the constant temperature water tank of scalable temperature, the triaxial cell can be placed in the constant temperature water tank in the course of the work, therefore can detect the data under the different temperatures.
The present invention is by above-mentioned constant temperature water tank, hydraulic servo control system, axially charger and triaxial cell can carry out research of coal containing methane gas seepage tests and the deformation failure The Characteristics of coal containing methane gas in flow event under the states such as stress, different gas pressure, different temperatures differently.
Be respectively equipped with link at described entablature two ends, be provided with supporting plate at described elevator platform top, described link is mounted on the described supporting plate by lanyard, and described supporting plate is positioned on the lifter, under the effect of lifter, axially charger and triaxial cell can move up and down.
Pressurizing piston bar between described axial charger and triaxial cell upper end is fixed with cushion block, so can avoid axial charger directly to the impact of air inlet connection for bbreather pipe.
In the axially extending bore of the described seat of honour orienting sleeve is housed, described pressurizing piston bar is sleeved on the described seat of honour by this orienting sleeve; Lower end, the described seat of honour outwards turns down and forms seat of honour terminal pad, described following upper end outwards turnover forms a following terminal pad, described seat of honour terminal pad is connected through bolt with a following terminal pad, be provided with " O " RunddichtringO in the described seat of honour and a following junction, " O " RunddichtringO be set effectively prevent leakage of oil.
Described advance oil drain out be positioned at described following axially, this enters advancing the oil extraction port and advancing draw-off pipe and link to each other of oil drain out; Described air inlet through hole inlet end is connected with admission line by joint, described exhaust hole exhaust end is connected with outlet pipe by joint, is connected with the high pressure gas bottle by admission line, realizes air feed, join by outlet pipe and flowmeter, realize the measurement of gas flow; Described drain hole is positioned at described seat of honour upper portion side wall, and the exhaust port of this described drain hole links to each other with gas outlet and tensimeter by T-valve, so can and measure confined pressure with the air emptying in the test cavity.
Described back shaft is the up big and down small step axle of the diameter of axle, and this back shaft step surface is spacing in described following axially extending bore upper end, fixedlys connected with described following through nut in described back shaft lower end.
Centering disk and following centering disk center hole hoop 4 mounting holes that evenly distribute on described, the described centering disk mounting hole corresponding with following centering disk of going up is respectively with 4 guide spiro rods connections.
Described hydraulic cylinder is made up of protecgulum, bonnet, cylinder body, piston, upper piston rod and lower piston rod, described protecgulum and bonnet cover the two ends up and down that are contained in cylinder body respectively and constitute piston cavity, on described protecgulum, be provided with oil-in, on described bonnet, be provided with oil-out, in described piston cavity, be provided with piston, be integrally formed with the upper piston rod that passes protecgulum in this piston upper surface, the lower surface is integrally formed with the lower piston rod that passes bonnet, this lower piston rod lower end is threaded with described pressure transducer upper end, and described upper piston rod bar footpath is less than described lower piston rod bar footpath.
Be provided with the door type framework that is made of pillar and support plate on described entablature, described displacement transducer passes support plate and is fixed on this type framework, and so design can make the fixing reliable of displacement transducer, does not rock, and measuring error is little; Described entablature is connected with protecgulum through screw, and hydraulic cylinder is fixed on this entablature lower surface.
Described lower piston rod lower end is threaded with described pressure transducer upper end; Described pressure head is made up of seaming chuck and push-down head, the lower end of described seaming chuck is the sphere arc, the upper end of described push-down head cooperates with this sphere arc is provided with spherical groove, described seaming chuck lower end is in hanging ring is fixed on this spherical groove, and this seaming chuck upper end is threaded in described pressure transducer lower end.Seaming chuck connects by sphere is universal with push-down head, has avoided the bias voltage of pressure head, makes experimental result more can reflect the true stressing conditions of test specimen.
The course of work of the present invention is such: (1) test material preparation, raw coal: the original coal cinder that will fetch from the scene places in the suitable wooden case of size with the plastic sheeting good seal, water with thin orthopaedics aggregate concrete then, to fill up the gap between coal cinder and the wooden case, treat to get core with corning machine again after the concrete hardening fully.Utilize grinding machine that the coal core that takes out carefully carefully is polished into the raw coal coal sample of Φ 50 * 100mm at last, and it is placed drying in oven, deposit with drying box again, in order to the usefulness of experiment; Moulded coal: the original coal cinder of get is pulverized with comminutor, by vibratory screening apparatus screening coal particle size is pulverized coal particle between 40～80 orders, adds a small amount of pure water then and evenly be placed on the coal sample that is pressed into Φ 50 * 100mm in the mould on 200t rigidity experimental machine with the pressure of 100MPa in the coal dust that these screen.Use being positioned over to prepare against in the drying box when testing after the moulded coal coal sample oven dry for preparing at last.
(2) test specimen is installed, for guaranteeing impermeability, earlier glue-line about one deck 1mm is smeared in coal sample test specimen side with 704 silicon rubber, after glue-line to be spread parches fully, coal sample carefully is positioned in the triaxial cell on the back shaft, be enclosed within on the coal sample with one section cylinder heat-shrink tube that grows about 40mm than coal sample, simultaneously the pressurizing piston bar is positioned on the coal sample, with hair dryer the cylinder heat-shrink tube is evenly blown tightly, tight to guarantee cylinder heat-shrink tube and coal sample contacts side surfaces, tightly wale test specimen cylinder heat-shrink tube and the intersection of back shaft and the intersection of cylinder heat-shrink tube and pressurizing piston bar at two ends up and down with aglet then, at last chain type radial displacement transducer connector lug is installed on the medium position of coal test specimen, connect the data transmission wiring, and assemble guide piece.
(3) installation is good with the seat of honour, triaxial cell and base contraposition, tight good screw; Gas inlet pipe and pressurizing piston bar upper end are connected, gas escape pipe and flowmeter are connected; Emptying is oil-filled to the triaxial cell; Check whether operate as normal of each system.
(4) vacuum outgas, the checking experiment container air-tightness is opened the valve of giving vent to anger, and outgases with vacuum pump, and general 1h of degassing time is to guarantee good degasifying effect.
(5) inflation adsorption equilibrium, after the degassing, close the valve of giving vent to anger, the triaxial cell is fallen into constant temperature water tank, set certain temperature, and exert pressure certain axial compression and confined pressure, regulate the high pressure methane steel cylinder valve of giving vent to anger, keep gas pressure certain, in test specimen, inflate, inflationtime is generally 24h, makes the abundant adsorption equilibrium of coal sample gas.
(6) test, carry out test under the different condition according to the testing program of formulating.
(7) location parameter, parameter to be determined has: axle pressure, confined pressure, gas pressure, axial displacement, radial displacement, temperature, gas flow etc.
(8) enter the next round test, after a test specimen is finished, the dismounting test specimen, and repeat (2)～(7) step and carry out the next round test.
Effect of the present invention:
1, concentrated expression of the present invention influences to permeability such as stress, gas pressure, temperature and distortion, can carry out the test under the single-factor influence, can carry out the test under the multifactor coupling again, the test of being carried out is the residing environment of the actual coal-bed gas seepage flow of simulated field preferably.
2, stress loading servo apply hydraulic pressure control system of the present invention is pressurizeed, loading procedure is stable, and can guarantee precision, and can realize such as loading forms such as cyclic loads, in addition, by adding the loading pump circulating cooling system, can realize long voltage stabilizing state, then can carry out the permeability test in the creep process.
3, the inflation inlet of pressurizing piston bar of the present invention and back shaft does not directly contact with coal sample with the gas outlet, but respectively by capacitor of design and ring-type bee-hole, realized " face inflation ", and no longer be in the past " some inflation ", realized actual coal-bed gas source more realistically
4, the present invention has designed a guide piece, can not rock after making coal sample test specimen assembling, avoids damaging the coal sample test specimen, coal sample test specimen survival rate and data acquisition stability are improved greatly, guaranteed the reliability of experimental data, simultaneously, the location when also having made things convenient for the triaxial cell to install.
5, the present invention has used sensitivity and the higher sensor of degree of accuracy when data acquisition, comprise axial compression sensor, confined pressure sensor, temperature sensor, shaft position sensor, chain type radial displacement transducer, flowmeter etc., guaranteed the reliability of data acquisition.
6, the present invention has designed a large-scale constant temperature water tank, can carry out the seepage tests under the different temperatures, and the water-bath water circulating pump is installed, and has guaranteed the homogeneity of being heated.
7, the design of axial charger of main element of the present invention and triaxial cell is lifted on the lifter, and has designed an active operation platform, and installation process greatly facilitates operation basically without manual handling.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of triaxial cell 2 among Fig. 1;
Fig. 3 is an A part enlarged diagram among Fig. 2;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is a B part enlarged diagram among Fig. 2;
Fig. 6 is the upward view of Fig. 5;
Fig. 7 is the structural representation of axial charger 3 among Fig. 1;
Fig. 8 is the structural representation of hydraulic cylinder 307 among Fig. 7.
Meaning of each numbering is in the above-mentioned accompanying drawing: 1. elevator platform, and 2. triaxial cell, 201. advance oil drain out, 202. following centering disk, 203. guide spiro rods, 204. seats of honour, 205. last centering disk, 206. orienting sleeves, 207. pressurizing piston bars, 208. the air inlet through hole, 209. drain hole, 210. back shafts, 211. exhaust hole, 212. sensor connector lugs, 213. times seats, 214. test cavity, 215. inlet chambers, 216. air inlet bee-holes, 217. discharge chamber, 218. exhaust bee-holes, 219. seat of honour terminal pads, 220. following seat terminal pad, 221. aglets, 222. cylinder heat-shrink tubes, 223. test specimen, 3. axial charger, 301. entablatures, 302. column, 303. push-down heads, 304. seaming chucks, 305. hanging ring, 306. pressure transducer, 307. hydraulic cylinders, 308. displacement transducers, 309. upper piston rod, 310. lower piston rod, 311. bonnets, 312. cylinder bodies, 313. piston, 314. protecgulum, 315. oil-ins, 316. oil-outs, 317. support plate, 318. pillar, 319. cushion blocks, 4. hydraulic servo control system, 401. axial compression loads oil pump, 402. confined pressure loads oil pump, 5. constant temperature water tank, 6. movable table, 7. heating tube, 8. water inlet pipe, 9. drainpipe, 10. water-bath water circulating pump, 11. link, 12. supporting plate, 13. lanyards, 14. lifters.
Embodiment:
The present invention is further illustrated below in conjunction with accompanying drawing.
See also Fig. 1: shown in the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid, comprise elevator platform 1, hydraulic servo control system 4, be installed in the axial charger 3 at elevator platform 1 top and be arranged on the triaxial cell 2 that elevator platform 1 middle part is connected axial charger 3 lower ends, below described triaxial cell 2, be provided with constant temperature water tank 5, be provided with movable table 6 on this constant temperature water tank 5,2 lower ends, described triaxial cell are placed on the described movable table 6;
In described constant temperature water tank 5, be provided with heating tube 7, be connected with pipeline on this constant temperature water tank 5, and on this pipeline, be provided with water intaking valve 8 and draining valve 9 is convenient to into draining, outside this constant temperature water tank 5, be provided with the water-bath water circulating pump 10 that communicates with constant temperature water tank 5, this water-bath water circulating pump 10 can circulate to the water in the constant temperature water tank 5, makes that the temperature in the constant temperature water tank 5 is even;
See also Fig. 2～Fig. 6: described triaxial cell 2 comprises the seat of honour 204 and following 213, be provided with the test cavity 214 that Open Side Down in the described seat of honour 204, axially have through hole on the seat of honour 204 of these test cavity 214 tops, described following 213 axially has step through-hole, the described seat of honour 204 is installed in down on the seat 213, on the described seat of honour 204 and following 213, be respectively equipped with the drain hole 209 that communicates with described test cavity 214 and advance oil drain out 201, so that make oil enter test cavity 214, when finishing, test is convenient to oil discharged and confined pressure loads preceding so that with the air emptying of test cavity 214, kink has pressurizing piston bar 207 in the axially extending bore at the described seat of honour 204, and these pressurizing piston bar 207 bottoms are stretched in the described test cavity 214; Be provided with air inlet through hole 208 on described pressurizing piston bar 207 axial lines, be provided with inlet chamber 215 in these pressurizing piston bar 207 bottoms, this inlet chamber 215 communicates with described test cavity 214 by air inlet bee-hole 216; In described following 213 axially extending bores, be equipped with described pressurizing piston bar 207 over against back shaft 210, on described back shaft 210 axial lines, be provided with exhaust hole 211, be provided with discharge chamber 217 in these back shaft 210 upper ends, this discharge chamber 217 communicates with test cavity 214 by exhaust bee-hole 218, when need are tested, earlier glue-line about one deck 1mm is smeared in test specimen 223 sides with 704 silicon rubber, after glue-line to be spread parches fully, be enclosed within on the test specimen 223 with one section cylinder heat-shrink tube 222 that grows about 40mm than test specimen 223, test specimen 223 is positioned on the back shaft 210 in the test cavity 214, described cylinder heat-shrink tube 222 bottoms are enclosed within back shaft 210 upper ends, described pressurizing piston bar 207 moves down and is positioned on the test specimen 223 simultaneously, described cylinder heat-shrink tube 222 upper ends are enclosed within pressurizing piston bar 207 bottoms, with hair dryer cylinder heat-shrink tube 222 is evenly blown tightly, tight to guarantee cylinder heat-shrink tube 222 and coal sample contacts side surfaces, tightly wale the cylinder heat-shrink tube 222 and the intersection of back shaft 210 and the intersection of cylinder heat-shrink tube 222 and pressurizing piston bar 207 at test specimen two ends about in the of 223 at last with described aglet 221; In described test cavity 214, be provided with guide piece, this guide piece by be installed in down seat on 213 following centering disk 202 and form through the last centering disk 205 that guide spiro rod 203 is installed in this time centering disk 202 tops, described on the center of centering disk 205 and following centering disk 202 have circular hole;
The described back shaft 210 warps center hole of centering disk 202 down stretch out, and the circular hole of described pressurizing piston bar 207 bottoms through last centering disk 205 centers stretches into the middle and upper part of described test cavity 214; Be provided with sensor connector lug 212 on following 213 in described test cavity 214, this sensor connector lug 212 passes described following 213 and links to each other with data acquisition system (DAS) through data line, on described sensor connector, be connected with the chain type sensor, this sensor is centered around on the above-mentioned cylinder heat-shrink tube 222, the radial displacement of being convenient to measure test specimen;
See also Fig. 7: described axial charger 3 comprises entablature 301, the column 302 and the seat of honour 204, described entablature 301 forms framed structure with the upper and lower side that the seat of honour 204 is separately fixed at column 302, on described entablature 301, displacement transducer 308 is housed, below this entablature 301, hydraulic cylinder 307 is installed, described hydraulic cylinder 307 is provided with oil-in 315 and oil-out 316, upper piston rod 309 upper ends in this hydraulic cylinder 307 are passed entablature 301 and are contacted with the gauge head of described displacement transducer 308 lower ends, lower piston rod 310 lower ends in this hydraulic cylinder 307 are connected with pressure transducer 306, described pressure transducer 306 links to each other with control system through data line, is connected with the ball-type pressure head in these pressure transducer 306 lower ends;
It can also be seen that in Fig. 1: described hydraulic servo control system 4 comprises that axial compression loads oil pump 401 and confined pressure loads oil pump 402, described axial compression loads oil pump 401 and is connected with described oil-in 315 and oil-out 316 by pipeline, described confined pressure loading oil pump 402 by pipeline with advance oil drain out 201 and be communicated with; Be respectively equipped with link 11 at described entablature 301 two ends, be provided with supporting plate 12 at described elevator platform 1 top, described link 11 is mounted on the described supporting plate 12 by lanyard 13, and described supporting plate 12 is positioned on the lifter 14.
It can also be seen that in Fig. 7: pressurizing piston bar 207 upper ends between described axial charger 3 and triaxial cell 2 are fixed with cushion block 319.
See also Fig. 2: 204 lower ends, the described seat of honour outwards turn down and form seat of honour terminal pad 219, described following 213 upper ends outwards turn down and form a following terminal pad 220, described seat of honour terminal pad 219 and a following terminal pad 220 are connected through bolt, are provided with " O " RunddichtringO at the described seat of honour 204 with following 213 junctions; In 204 axially extending bores of the described seat of honour, orienting sleeve 206 is housed, described pressurizing piston bar 207 is sleeved on the described seat of honour 204 by this orienting sleeve 206, be provided with packoff between described pressurizing piston bar 207 and the orienting sleeve 206, the sealing device is formed by being sleeved on the orienting sleeve 206 on the described pressurizing piston bar 207 and the flange gland and the O-ring seal of this orienting sleeve 206 upper ends, the flange gland is installed in the top at the seat of honour 204 through screw, and the inner ring of this flange gland is equipped with dust ring.
Described advance oil drain out 201 be positioned at described following 213 axial, this enters advancing the oil extraction port and advancing draw-off pipe and link to each other of oil drain out 201; Described drain hole 209 is positioned at the described seat of honour 204 upper portion side wall, and the exhaust port of this described drain hole 209 links to each other with gas outlet and tensimeter by T-valve.
It can also be seen that in Fig. 2: described back shaft 210 is the up big and down small step axle of the diameter of axle, and these back shaft 210 steps are spacing in described following 213 axially extending bores upper end, fixedlys connected with described following 213 through nut in described back shaft 210 lower ends; Described following 213 upper ends are provided with dimple, described centering disk 202 down is positioned at this dimple, centering disk 205 and following centering disk 202 center hole hoops 4 mounting holes that evenly distribute on described, the described corresponding mounting hole of centering disk 205 and following centering disk 202 of going up is respectively with 203 connections of 4 guide spiro rods.
See also Fig. 8: described hydraulic cylinder 307 is by protecgulum 314, bonnet 311, cylinder body 312, piston 313, upper piston rod 309 and lower piston rod 310 are formed, described protecgulum 314 and bonnet 311 cover the two ends up and down that are contained in cylinder body 312 respectively and constitute piston cavity, on described protecgulum 314, be provided with oil-in 315, on described bonnet 311, be provided with oil-out 316, in described piston cavity, be provided with piston 313, be integrally formed with the upper piston rod 309 that passes protecgulum 314 in these piston 313 upper surfaces, the lower surface is integrally formed with the lower piston rod 310 that passes bonnet 311, these lower piston rod 310 lower ends are threaded with described pressure transducer 306 upper ends, and described upper piston rod 309 bars footpath is less than described lower piston rod 310 bars footpath.
It can also be seen that in Fig. 7: be provided with the door type framework that is made of pillar 318 and support plate 317 on described entablature 301, described displacement transducer 308 passes support plate 317 and is fixed on this type framework; Described entablature 301 is connected with protecgulum 314 through screw, and hydraulic cylinder 307 is fixed on this entablature 301 lower surfaces.
Claims (10)
1, the solid coupled three-shaft servo seepage apparatus of a kind of coal containing methane gas hot-fluid, comprise elevator platform (1), hydraulic servo control system (4), be installed in the axial charger (3) at elevator platform (1) top and be arranged on the triaxial cell (2) that elevator platform (1) middle part is connected axial charger (3) lower end, it is characterized in that: be provided with constant temperature water tank (5) in the below of described triaxial cell (2), be provided with movable table (6) on this constant temperature water tank (5), lower end, described triaxial cell (2) is placed on the described movable table (6);
Be provided with heating tube (7) in described constant temperature water tank (5), this constant temperature water tank (5) is connected with pipeline, and is provided with water intaking valve (8) and draining valve (9) on this pipeline, is provided with the water-bath water circulating pump (10) that communicates with constant temperature water tank (5) outside this constant temperature water tank (5);
Described triaxial cell (2) comprises the seat of honour (204) and following (213), be provided with the test cavity that Open Side Down (214) in the described seat of honour (204), axially have through hole on the seat of honour (204) of this test cavity (214) top, described following (213) axially have step through-hole, the described seat of honour (204) is installed in down on the seat (213), on the described seat of honour (204) and following (213), be respectively equipped with the drain hole (209) that communicates with described test cavity (214) and advance oil drain out (201), kink has pressurizing piston bar (207) in the axially extending bore of the described seat of honour (204), and this pressurizing piston bar (207) bottom is stretched in the described test cavity (214); Be provided with air inlet through hole (208) on described pressurizing piston bar (207) axial line, be provided with inlet chamber (215) in this pressurizing piston bar (207) bottom, this inlet chamber (215) communicates with described test cavity (214) by air inlet bee-hole (216); In described following (213) axially extending bore, be equipped with described pressurizing piston bar (207) over against back shaft (210), on described back shaft (210) axial line, be provided with exhaust hole (211), be provided with discharge chamber (217) in this back shaft (210) upper end, this discharge chamber (217) communicates with test cavity (214) by exhaust bee-hole (218); In described test cavity (214), be provided with guide piece, this guide piece is made up of the following centering disk (202) and the last centering disk (205) above guide spiro rod (203) is installed in this time centering disk (202) that are installed in down on the seat (213), described center of going up centering disk (205) and following centering disk (202) has circular hole, described back shaft (210) the warp center hole of centering disk (202) down stretches out, and the circular hole of described pressurizing piston bar (207) bottom through last centering disk (205) center stretches into the middle and upper part of described test cavity (214); Be provided with sensor connector lug (212) on following (213) in described test cavity (214), this sensor connector lug (212) passes described following (213) and links to each other with data acquisition system (DAS) through data line;
Described axial charger (3) comprises entablature (301), column (302) and the seat of honour (204), described entablature (301) forms framed structure with the upper and lower side that the seat of honour (204) is separately fixed at column (302), displacement transducer (308) is housed on described entablature (301), in this entablature (301) below hydraulic cylinder (307) is installed, described hydraulic cylinder (307) is provided with oil-in (315) and oil-out (316), upper piston rod (309) upper end in this hydraulic cylinder (307) is passed entablature (301) and is contacted with the gauge head of described displacement transducer (308) lower end, lower piston rod (310) lower end in this hydraulic cylinder (307) is connected with pressure transducer (306), described pressure transducer (306) links to each other with control system through data line, is connected with the ball-type pressure head in this pressure transducer (306) lower end;
Described hydraulic servo control system (4) comprises that axial compression loads oil pump (401) and confined pressure loads oil pump (402), described axial compression loads oil pump (401) and is connected with described oil-in (315) and oil-out (316) by pipeline, described confined pressure loading oil pump (402) by pipeline with advance oil extraction (201) and be communicated with.
2, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1, it is characterized in that: be respectively equipped with link (11) at described entablature (301) two ends, be provided with supporting plate (12) at described elevator platform (1) top, described link (11) is mounted on the described supporting plate (12) by lanyard (13), and described supporting plate (12) is positioned on the lifter (14).
3, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1 is characterized in that: pressurizing piston bar (207) upper end between described axial charger (3) and triaxial cell (2) is fixed with cushion block (319).
4, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1, it is characterized in that: in the axially extending bore of the described seat of honour (204) orienting sleeve (206) is housed, described pressurizing piston bar (207) is sleeved on the described seat of honour (204) by this orienting sleeve (206); Lower end, the described seat of honour (204) outwards turns down and forms seat of honour terminal pad (219), described following (213) upper end outwards turnover forms a following terminal pad (220), described seat of honour terminal pad (219) is connected through bolt with a following terminal pad (220), is provided with " O " RunddichtringO in the described seat of honour (204) and following (213) junction.
5, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1 is characterized in that: describedly advance oil drain out (201) and be positioned at described following (213) axially, this enters advancing the oil extraction port and advancing draw-off pipe and link to each other of oil drain out (201); Described air inlet through hole (208) inlet end is connected with admission line by joint, and described exhaust hole (211) exhaust end is connected with outlet pipe by joint; Described drain hole (209) is positioned at the described seat of honour (204) upper portion side wall, and the exhaust port of this described drain hole (209) links to each other with gas outlet and tensimeter by T-valve.
6, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1, it is characterized in that: described back shaft (210) is the up big and down small step axle of the diameter of axle, this back shaft (210) step surface is spacing in described following (213) axially extending bore upper end, fixedlys connected with described following (213) through nut in described back shaft (210) lower end.
7, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1, it is characterized in that: centering disk (205) and following centering disk (202) center hole hoop 4 mounting holes that evenly distribute on described, described centering disk (205) mounting hole corresponding with following centering disk (202) of going up used 4 guide spiro rods (203) connection respectively.
8, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1, it is characterized in that: described hydraulic cylinder (307) is by protecgulum (314), bonnet (311), cylinder body (312), piston (313), upper piston rod (309) and lower piston rod (310) are formed, described protecgulum (314) and bonnet (311) cover the two ends up and down that are contained in cylinder body (312) respectively and constitute piston cavity, on described protecgulum (314), be provided with oil-in (315), on described bonnet (311), be provided with oil-out (316), in described piston cavity, be provided with piston (313), be integrally formed with the upper piston rod (309) that passes protecgulum (314) in this piston (313) upper surface, the lower surface is integrally formed with the lower piston rod (310) that passes bonnet (311), this lower piston rod (310) lower end is threaded with described pressure transducer (306) upper end, and described upper piston rod (309) bar footpath is less than described lower piston rod (310) bar footpath.
9, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1, it is characterized in that: be provided with the door type framework that is made of pillar (318) and support plate (317) on described entablature (301), described displacement transducer (308) passes support plate (317) and is fixed on this type framework; Described entablature (301) is connected with protecgulum (314) through screw, and hydraulic cylinder (307) is fixed on this entablature (301) lower surface.
10, the solid coupled three-shaft servo seepage apparatus of coal containing methane gas hot-fluid according to claim 1 is characterized in that: described lower piston rod (310) lower end is threaded with described pressure transducer (306) upper end; Described pressure head is made up of seaming chuck (304) and push-down head (303), the lower end of described seaming chuck (304) is the sphere arc, the upper end of described push-down head (303) cooperates with this sphere arc is provided with spherical groove, described seaming chuck (304) lower end is fixed in this spherical groove through hanging ring (305), and this seaming chuck (304) upper end is threaded in described pressure transducer (306) lower end.
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| CN2009101046088A CN101634621B (en) | 2009-08-12 | 2009-08-12 | Fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal |
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| CN2009101046088A CN101634621B (en) | 2009-08-12 | 2009-08-12 | Fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal |
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| CN101634621B CN101634621B (en) | 2011-05-25 |
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| CN2009101046088A Expired - Fee Related CN101634621B (en) | 2009-08-12 | 2009-08-12 | Fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal |
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