CN103884604B - A kind of multifunctional high-temperature high pressure three axle coal petrography test unit and method - Google Patents
A kind of multifunctional high-temperature high pressure three axle coal petrography test unit and method Download PDFInfo
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Abstract
The invention discloses a kind of multifunctional high-temperature high pressure three axle coal petrography test unit and method, described device comprises loading system, temperature control heating system, acoustic emission system, gas sampling system, insulation and hermetically-sealed construction and cooling system.The present invention can measure the phase-changeable gas product of coal petrography sample under the surface temperature of three axle coal petrography samples under High Temperature High Pressure effect, axial load, axial strain, acoustic emission signal and Real-time Collection High Temperature High Pressure in real time simultaneously, provides effective experimental facilities and effective foundation to the phase-changeable gas generation of the deformation characteristic of three axle coal petrographys under researching high-temperature high pressure, crack initiation, expansion and Fracture and coal petrography; Temperature, axle pressure and the confined pressure affecting laws to coal rock deformation characteristic, crack initiation, expansion and fracture characteristics can be investigated simultaneously, explore temperature, axle pressure, confined pressure and coal rock deformation to the affecting laws of coal petrography phase-changeable gas generation, this provides effective experimental assembly to three axle coal petrography mechanical characteristics and physical and chemical performance under quantitatively characterizing High Temperature High Pressure.
Description
Technical field
The present invention relates to a kind of multifunctional high-temperature high pressure three axle coal petrography test unit and method, in order to deformation characteristic, the crack initiation and propagation rule of three axle coal petrographys under researching high-temperature high pressure, also have the phase-changeable gas generation of coal petrography and the relationship schedule with coal rock deformation thereof.
Background technology
The mankind in deep mining, coal-bed gas exploitation, geothermal energy resources exploitation, the liquefaction of coal underground and the deep resource energy development process such as gasification and Deep Oil-gas exploitation, in the urgent need to the characteristic of rock mass under the effect of exploration High Temperature High Pressure.In progress of coal mining, coal is a kind of organolite all very responsive to temperature, pressure and tectonic stress, under High Temperature High Pressure effect, the gas that the distortion of the deformation characteristic of coal, fracture characteristics and coal occurs produces and protrusion phenomenon affects the safety of coal mining, such as, often there is the roof fall phenomenon because Rock Masses Fractures, be caving etc. causes and gas burst accident in process of coal mining.Therefore, the stressed condition of three axles of simulation earth's crust deep rock, a kind of multifunctional high-temperature high pressure three axle coal petrography test unit and method are provided, disclose the pyrolytic reaction of the deformation characteristic of coal petrography under High Temperature High Pressure, crack initiation and propagation rule and coal petrography, to coal field geology and mine gas predication and prevention, there is important theory directive significance.
At present, conventional High Temperature High Pressure coal petrography test unit and method have: the patent No. is a kind of High Temperature High Pressure Triaxial tester containing organic rock mass and method disclosed in CN201110267767, only the pyrolysis product of the organic rock mass of bulk under researching high-temperature high pressure; The patent No. is a kind of moulded coal High Temperature High Pressure gasification property evaluating apparatus disclosed in CN201320138995, investigate temperature of reaction, vapor pressure, vaporized chemical flow to the impact of gas composition after type coal gasification, tar yield, gasification activity, flying dust carry-over, lime-ash state etc., can only High Temperature High Pressure mo(u)ld bottom half coal gasification characteristic be evaluated; Number of patent application one disclosed in CN201310121184 is covered pressure lower coal petrography hole of heating and is oozed electroacoustic ess-strain translocation device, under the effect of researching high-temperature high pressure three axle, the factor of porosity of coal petrography sample, Gas And Water Relative Permeability, stress-strain diagram, resistivity and acoustic velocity, do not inquire into fracture characteristics and the pyrolytic reaction of coal petrography sample; The test unit of number of patent application a kind of High Temperature High Pressure pyrolytic reaction disclosed in CN201310220946 and CN201310220947 and method, only provide Triaxial tester and the method for resinous shale and low-disintegration coal pyrolytic reaction under researching high-temperature high pressure.But, in experimentation, can the multifunctional high-temperature high pressure three axle coal petrography test unit of the deformation characteristic of researching high-temperature Coal Under High Pressure rock, crack initiation, expansion and Fracture and coal petrography pyrolytic reaction and method also not have simultaneously.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of multifunctional high-temperature high pressure three axle coal petrography test unit and method, be a kind of multiple functional, method is easy, easy-operating High Temperature High Pressure three axle coal petrography test unit and method, in order to the deformation characteristic of researching high-temperature Coal Under High Pressure rock, crack initiation and propagation rule, the phase-changeable gas generation of coal petrography and the relationship schedule with coal rock deformation thereof can be also had.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of multifunctional high-temperature high pressure three axle coal petrography test unit, comprises loading system, temperature control heating system, acoustic emission system, gas sampling system, insulation and hermetically-sealed construction and cooling system:
Described loading system comprises pedestal, lower loading unit, confined pressure loading unit and upper loading unit;
Described pedestal comprises base, two support posts be symmetricly set on base, be horizontally fixed on the support of two support post bottoms, be horizontally fixed on the carrier bar on two support post tops; Described mid-stent offers through hole;
Described lower loading unit comprises with the hydraulic elevator platform of displacement transducer, the lower compact disk be arranged on hydraulic elevator platform, the loading blocks be arranged in lower compact disk, T-shaped piece of being arranged in loading blocks, the push-down head be arranged on T-shaped piece, described hydraulic elevator platform is arranged on the middle part of base, and the upper surface of described loading blocks is provided with the suitable location structure in the lower end large with T-shaped piece;
The ring screw cover that described confined pressure loading unit comprises cylindrical shell, is arranged on the circular disk of inner barrel lower end, is arranged on the A pyrophyllite bisque of circular disk upper end, is arranged on the salt ring of A pyrophyllite bisque upper end, is arranged on the B pyrophyllite bisque of salt ring upper end, is arranged on B pyrophyllite bisque upper end, coal petrography sample is arranged in cylindrical shell;
Described upper loading unit comprises seaming chuck, the A cylinder briquetting be arranged on seaming chuck, the convex block be arranged on A cylinder briquetting, with the suitable gland of convex block, be arranged on the B intermediate pressing block on convex block, the upper compact disk be arranged on B intermediate pressing block;
The outer cross section of described circular disk, the outer cross section of A leaf paraffin bisque, the outer cross section of salt ring are identical with the interior cross sectional shape of cylindrical shell corresponding position with the outer cross section of B leaf paraffin bisque, the interior cross section of the interior cross section of the xsect of the xsect of the shape of through holes of mid-stent, the upper end of T-shaped piece little, the xsect of push-down head, coal petrography sample, the xsect of seaming chuck, circular disk, the interior cross section of A leaf paraffin bisque, salt ring, the interior cross sectional shape of B leaf paraffin bisque are identical, the upper end of described T-shaped piece little is successively through the through hole of mid-stent, through hole in the middle part of through hole in the middle part of circular disk and A leaf paraffin bisque, described push-down head, coal petrography sample, seaming chuck and A cylinder briquetting overlay on the small end face of T-shaped piece from the bottom to top successively, and be placed in the A leaf paraffin bisque stacked successively from the bottom to top, salt ring, in the passage of B leaf paraffin bisque and the common formation of ring screw cover, described coal petrography sample comprises the combination set that wraps up around the coal petrography at middle part and coal petrography, described combination set is followed successively by sheet copper from the inside to the outside, micarex, electric resistance alloy sheet and micarex, wherein the upper and lower two ends of electric resistance alloy sheet contact with push-down head with seaming chuck respectively, described A leaf paraffin bisque, salt ring, B leaf paraffin bisque and A cylinder briquetting are placed in cylindrical shell, and described ring screw cover is outside to be threaded connection with cylindrical shell upper end, lower end and the support of described cylindrical shell are fixed, and the lower end that described convex block is large covers the upper port of cylindrical shell, and is fixed on cylindrical shell by gland, and described upper compact disk and carrier bar are fixed, described carrier bar is provided with tension-compression sensor,
Described temperature control heating system comprises electric resistance alloy sheet, salt ring, the thermocouple needle be arranged in salt ring, intelligent temperature control instrument and bidirectional triode thyristor in heating electrode plates, combination set; Described heating electrode plates is placed between loading blocks and lower compact disk, and contacts with loading blocks bottom surface, and is separated with heat resistance insulating sheet between lower compact disk; The output signal access intelligent temperature control instrument of described thermocouple needle, the bidirectional triode thyristor on described intelligent temperature control instrument controls heating electrode plates;
Described acoustic emission system comprises the calibrate AE sensor being arranged on loading blocks side;
Described gas sampling system comprises high temperature resistant stainless steel pipe, gas sampler, be arranged on the gas sampling bag on gas sampler, described high temperature resistant stainless steel pipe is arranged on gland, the gas that under High Temperature High Pressure effect, coal petrography phase transformation produces is successively by the through hole on seaming chuck, gap between seaming chuck and A cylinder briquetting surface of contact, through hole in the middle part of A cylinder briquetting, the end face radial hole that the convex block be connected with the through hole in the middle part of A cylinder briquetting is large, gap between convex block and gland surface of contact, through hole on gland and enter in high temperature resistant stainless steel pipe, and led to gas sampler,
Described insulation and hermetically-sealed construction comprise the A micarex be arranged between convex block and B intermediate pressing block, be arranged on the heat resistance insulating sheet between lower compact disk and heating electrode plates, be arranged on the A red copper pad between convex block and gland step surface, be arranged on the B red copper pad between gland and cylindrical shell surface of contact, be arranged on the C red copper pad between T-shaped piece and push-down head surface of contact, be arranged on the D red copper pad between support and cylindrical shell surface of contact, be arranged on the high temperature high voltage resistant YX RunddichtringO between support and T-shaped piece,
Described cooling system comprises the A cooling water pipe be wrapped in outside high temperature resistant stainless steel pipe and the B cooling water pipe be wrapped in outside cylindrical shell.
Preferably, the lower end of described cylindrical shell is fixed by A sunk screw and support, and described gland is fixed by B sunk screw and cylindrical shell, all scribbles high-temperature insulation glue at the head of convex block and gland step surface engagement edge, A sunk screw and B sunk screw.
Preferably, described hydraulic elevator platform is the hydraulic elevator platform that WEW-600 microcomputer controls screen display universal testing machine.
A kind of multifunctional high-temperature high pressure three axle coal petrography test method, comprises the steps:
(1) by support installing on two support posts, T-shaped piece through the support being provided with high temperature high voltage resistant YX RunddichtringO, T-shaped piece of large lower end to be placed in loading blocks and to be located by location structure; Described loading blocks is placed in lower compact disk, between loading blocks and lower compact disk, arrange heating electrode plates and heat resistance insulating sheet; Calibrate AE sensor is placed in the side of loading blocks;
(2) circular disk is enclosed within T-shaped piece, C red copper pad and push-down head are positioned on T-shaped piece successively, be fixed on support by A sunk screw by cylindrical shell, the head of described A sunk screw all scribbles high-temperature insulation glue, is lined with D red copper pad between cylindrical shell and support; A leaf paraffin powder is put into the annular gap between cylindrical shell and push-down head; Coal petrography sample is positioned on push-down head, then salt is put into the annular gap between cylindrical shell and coal petrography sample, and thermocouple needle is imbedded salt ring, the wire of thermocouple needle is drawn in the compacting of salt ring; Seaming chuck is positioned on coal petrography sample, then B leaf paraffin powder is put into the annular gap between cylindrical shell and seaming chuck; By dial torque wrench, ring screw cover is screwed in cylindrical shell, until compression B pyrophyllite bisque is to certain depth, presets coal petrography confined pressure size and calculate by moment of torsion conversion, then A cylinder briquetting is put into ring screw cover endoporus;
(3) be placed in cylindrical shell upper end by convex block, gland is enclosed within convex block, and is fixed on cylindrical shell by B sunk screw, and the head of described B sunk screw all scribbles high-temperature insulation glue; A red copper pad is set between convex block and gland step surface, B red copper pad is set between cylindrical shell and gland surface of contact, A micarex is set between convex block and B intermediate pressing block;
(4) the extraction wire of thermocouple needle is connected on intelligent temperature control instrument, is controlled the size of electric current in heating electrode plates by bidirectional triode thyristor; The gas that coal petrography phase transformation under High Temperature High Pressure effect produces is drawn by high temperature resistant stainless steel pipe, via gas sampler and gas sampling bag collection; In the outer felt of cylindrical shell around B cooling water pipe, in the outer felt of high temperature resistant stainless steel pipe around A cooling water pipe;
(5) move lower compact disk by hydraulic elevator platform, make coal petrography sample be depressed into initial setting axial load, coal rock deformation amount and axial load value size are respectively by displacement transducer and tension-compression sensor record;
(6) heated coal petrography sample by temperature control heating system, when the set temperature is reached, coal petrography sample is incubated, and increasing coal petrography sample axial load to different set axial load value, when reaching maximum setting shaft to load value, stopping experiment; The acoustic emission signal in coal petrography sample compression process is measured, coal petrography sample phase-change product corresponding during axially different load value under utilization gas sampling system collection certain predetermined confined pressure by calibrate AE sensor.
Beneficial effect: multifunctional high-temperature high pressure three axle coal petrography test unit provided by the invention and method, compared to existing technology, the phase-changeable gas product of coal petrography sample under the environment temperature of coal petrography sample under High Temperature High Pressure effect, axial load, axial strain, acoustic emission signal and Real-time Collection High Temperature High Pressure can be measured in real time simultaneously, to the deformation characteristic of researching high-temperature Coal Under High Pressure rock, crack initiation, expansion and Fracture, the phase-changeable gas generation of coal petrography provides effective experimental facilities and effective foundation; Temperature, confined pressure and the axle pressure affecting laws to coal rock deformation characteristic, crack initiation, expansion and fracture characteristics can be investigated simultaneously, explore temperature, confined pressure, axle pressure and coal rock deformation to the affecting laws of coal petrography phase-changeable gas generation, this provides effective experimental assembly to coal petrography mechanical characteristic and physical and chemical performance under quantitatively characterizing High Temperature High Pressure; Its structure is simple, easy and simple to handle, multiple functional, effective, has practicality widely in the art.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1-support post, 2-carrier bar, 3-B intermediate pressing block, the upper compact disk of 4-, 5-high temperature resistant stainless steel pipe, 6-A red copper pad, 7-A cooling water pipe, 8-B red copper pad, 9-A cylinder briquetting, 10-B cooling water pipe, 11-salt ring, 12-combination set (sheet copper, micarex, electric resistance alloy sheet, micarex), 13-gas sampler, 14-gas sampling bag, 15-support, 16-D red copper pad, 17-A sunk screw, 18-heating electrode plates, 19-heat resistance insulating sheet, 20-loading blocks, 21-base, 22-hydraulic elevator platform, compact disk under 23-, 24-T type block, 25-calibrate AE sensor, 26-high temperature high voltage resistant YX RunddichtringO, 27-circular disk, 28-C red copper pad, 29-A pyrophyllite bisque, 30-push-down head, 31-cylindrical shell, 32-thermocouple needle, 33-coal petrography sample, 34-B pyrophyllite bisque, 35-seaming chuck, 36-ring screw cover, 37-B sunk screw, 38-gland, 39-convex block, 40-A micarex, 41-intelligent temperature control instrument, 42-bidirectional triode thyristor.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Be illustrated in figure 1 a kind of multifunctional high-temperature high pressure three axle coal petrography test unit, comprise loading system, temperature control heating system, acoustic emission system, gas sampling system, insulation and hermetically-sealed construction and cooling system.
Described loading system comprises pedestal, lower loading unit, confined pressure loading unit and upper loading unit.
Described pedestal comprises base 21, two support posts 1 be symmetricly set on base 21, be horizontally fixed on the support 15 of two support post 1 bottoms, be horizontally fixed on the carrier bar 2 on two support post 1 tops; Through hole is offered in the middle part of described support 15.
Described lower loading unit comprises hydraulic elevator platform 22, the lower compact disk 23 be arranged on hydraulic elevator platform 22, the loading blocks 20 be arranged in lower compression 23, T-shaped piece 24 of being arranged in loading blocks 20, the push-down head 30 be arranged on T-shaped piece 24 of WEW-600 microcomputer control screen display universal testing machine (maximum compression 600kN) with displacement transducer, described hydraulic elevator platform 22 is arranged on the middle part at the end 21, and the upper surface of described loading blocks 20 is provided with the location structure suitable with T-shaped piece of 24 large lower ends.
Described confined pressure loading unit comprises cylindrical shell 31, be arranged on the circular disk 27 of cylindrical shell 31 interior lower end, be arranged on the A pyrophyllite bisque 29(pyrophyllite in powder of circular disk 27 upper end has that chemical inertness, fusing point are high, high temperature high voltage resistant and the feature such as biography temperature, pressure transmission homogeneity), be arranged on A pyrophyllite bisque 29 upper end salt ring 11, be arranged on the B pyrophyllite bisque 34 of salt ring 11 upper end, be arranged on the ring screw cover 36 of B pyrophyllite bisque 34 upper end, coal petrography sample 33 is arranged in cylindrical shell 31.
Described upper loading unit comprises seaming chuck 35, the A cylinder briquetting 9 be arranged on seaming chuck 35, the convex block 39 be arranged on A cylinder briquetting 9, with the suitable gland 38 of convex block 39, be arranged on the B intermediate pressing block 3 on convex block 39, the upper compact disk 4 be arranged on B intermediate pressing block 3.
The outer cross section of described circular disk 27, the outer cross section of A leaf paraffin bisque 29, the outer cross section of salt ring 11 are identical with the interior cross sectional shape of cylindrical shell 31 corresponding position with the outer cross section of B leaf paraffin bisque 34, the interior cross section of the interior cross section of the xsect of the xsect of the shape of through holes in the middle part of support 15, T-shaped piece of 24 little upper ends, the xsect of push-down head 30, coal petrography sample 33, the xsect of seaming chuck 35, circular disk 27, the interior cross section of A leaf paraffin bisque 29, salt ring 11, the interior cross sectional shape of B leaf paraffin bisque 34 are identical, described T-shaped piece of 24 little upper ends are successively through the through hole in the middle part of support 15, through hole in the middle part of through hole in the middle part of circular disk 27 and A leaf paraffin bisque 29, described push-down head 30, coal petrography sample 33, seaming chuck 35 and A cylinder briquetting overlay on the small end face of T-shaped piece 24 from the bottom to top successively, and be placed in the A leaf paraffin bisque 29 stacked successively from the bottom to top, salt ring 11, in the passage that B leaf paraffin bisque 34 and ring screw cover 36 are formed jointly, described coal petrography sample 33 comprises the combination set 12 that wraps up around the coal petrography at middle part and coal petrography, described combination set 12 is followed successively by sheet copper from the inside to the outside, micarex (maximum operating temperature 800 DEG C), electric resistance alloy sheet and micarex, guarantee the insulation between electric resistance alloy sheet and sheet copper, wherein the upper and lower two ends of electric resistance alloy sheet contact with push-down head 30 with seaming chuck 35 respectively, described A leaf paraffin bisque 29, salt ring 11, B leaf paraffin bisque 34 and A cylinder briquetting 9 are placed in cylindrical shell 31, and described ring screw cover 36 is outside to be threaded connection with cylindrical shell 31 upper end, lower end and the support 15 of described cylindrical shell 31 are fixed, and the lower end that described convex block 39 is large covers the upper port of cylindrical shell 31, and is fixed on cylindrical shell 31 by gland 38, and described upper compact disk 4 is fixed with carrier bar 2, described cylindrical shell 31 is in thick cyclinder shape, and adopt pinoplastics moldings's steel (H13) processing and fabricating, this steel phase transition temperature is 800 DEG C, described carrier bar 2 is provided with tension-compression sensor, and described tension-compression sensor is for the axial load measuring coal petrography in compression process and bear and coal rock deformation amount.
Described temperature control heating system comprises electric resistance alloy sheet, salt ring 11, the thermocouple needle 32 be arranged in salt ring 11, intelligent temperature control instrument 41 and bidirectional triode thyristor 42 in heating electrode plates 18, combination set 12; Described heating electrode plates 18 is placed between loading blocks 20 and lower compact disk 23, and contacts with loading blocks 20 bottom surface, and is separated with heat resistance insulating sheet 19 between lower compact disk 23; The output signal access intelligent temperature control instrument 41 of described thermocouple needle 32, the 42 pairs of heating electrode plates 18 of the bidirectional triode thyristor on described intelligent temperature control instrument 41 control.
Described acoustic emission system comprises the calibrate AE sensor 25 being arranged on loading blocks 20 side, between loading blocks 20 side and calibrate AE sensor 25, scribble couplant.
Described gas sampling system comprises high temperature resistant stainless steel pipe 5, gas sampler 13, be arranged on the gas sampling bag 14 on gas sampler, described high temperature resistant stainless steel pipe 5 is arranged on gland 38, the gas that under High Temperature High Pressure effect, coal petrography phase transformation produces is successively by the through hole on seaming chuck 35, gap between seaming chuck 35 and A cylinder briquetting 9 surface of contact, through hole in the middle part of A cylinder briquetting 9, the end face radial hole that the convex block 39 be connected with the through hole in the middle part of A cylinder briquetting 9 is large, gap between convex block 39 and gland 38 surface of contact, through hole on gland 38 and enter in high temperature resistant stainless steel pipe 5, and led to gas sampler 13.
Described insulation and hermetically-sealed construction comprise the A micarex 40 be arranged between convex block 39 and B intermediate pressing block 3, be arranged on the heat resistance insulating sheet 19 between lower compact disk 23 and heating electrode plates 18, be arranged on the A red copper pad 6 between convex block 39 and gland 38 step surface, be arranged on the B red copper pad 8 between gland 38 and cylindrical shell 31 surface of contact, be arranged on the C red copper pad 28 between T-shaped piece 24 and push-down head 30 surface of contact, be arranged on the D red copper pad 16 between support 15 and cylindrical shell 31 surface of contact, be arranged on the high temperature high voltage resistant YX RunddichtringO 26 between support 15 and T-shaped piece 24, wherein micarex and heat resistance insulating sheet 19 play insulating effect, and red copper pad and O-ring seal play sealing function, in order to the gaseous product free diffusing preventing coal petrography under High Temperature High Pressure effect from undergoing phase transition generation.
Described cooling system comprises the A cooling water pipe 6 be wrapped in outside high temperature resistant stainless steel pipe 5 and the B cooling water pipe 8 be wrapped in outside cylindrical shell 25.
A kind of multifunctional high-temperature high pressure single shaft coal petrography test method, comprises the steps:
(1) support 15 is arranged on two support posts 1, T-shaped piece 24 through the support 15 being provided with high temperature high voltage resistant YX RunddichtringO, T-shaped piece of 24 large lower end to be placed in loading blocks 20 and to be located by location structure; Described loading blocks 20 is placed in lower compact disk 23, arranges heating electrode plates 18 and heat resistance insulating sheet 19 between loading blocks 20 and lower compact disk 23; Calibrate AE sensor 25 is placed in the side of loading blocks 20;
(2) circular disk 27 is enclosed within T-shaped piece 24, C red copper pad 28 and push-down head 30 are positioned on T-shaped piece 24 successively, by A sunk screw 17, cylindrical shell 31 is fixed on support 15, the head of described A sunk screw 17 all scribbles high-temperature insulation glue, is lined with D red copper pad 16 between cylindrical shell 31 and support 15; A leaf paraffin powder 29 is put into the annular gap between cylindrical shell 31 and push-down head 30; Be positioned over by coal petrography sample 33 on push-down head 30, then salt 11 put into the annular gap between cylindrical shell 31 and coal petrography sample 33, and thermocouple needle 32 is imbedded salt ring 11, by salt ring, 11 compactings also draw the wire of thermocouple needle 32; Seaming chuck 35 is positioned on coal petrography sample 33, then B leaf paraffin powder 34 is put into the annular gap between cylindrical shell 31 and seaming chuck 35; By dial torque wrench, ring screw cover 36 is screwed in cylindrical shell 31, until compression B pyrophyllite bisque 34 is to certain decrement (0 ~ 10mm), preset coal petrography confined pressure size to calculate by moment of torsion conversion, then A cylinder briquetting 9 is put into ring screw and overlap 36 endoporus;
(3) be placed in cylindrical shell 31 upper end by convex block 39, gland 38 is enclosed within convex block 39, and is fixed on cylindrical shell 31 by B sunk screw 37, and the head of described B sunk screw 37 all scribbles high-temperature insulation glue; A red copper pad 6 is set between convex block 39 and gland 38 step surface, B red copper pad 8 is set between cylindrical shell 31 and gland 38 surface of contact, A micarex 40 is set between convex block 39 and B intermediate pressing block 3;
(4) the extraction wire of thermocouple needle 32 is connected on intelligent temperature control instrument 41, is controlled the size of electric current in heating electrode plates 18 by bidirectional triode thyristor 42; The gas that coal petrography phase transformation under High Temperature High Pressure effect produces is drawn by high temperature resistant stainless steel pipe 5, gathers via gas sampler 13 and gas sampling bag 14; In the outer felt of cylindrical shell 31 around B cooling water pipe 10, in the outer felt of high temperature resistant stainless steel pipe 5 around A cooling water pipe 7;
(5) move lower compact disk 23 by hydraulic elevator platform 22, make coal petrography sample 33 be depressed into initial setting axial load, coal rock deformation amount and axial load value size are respectively by displacement transducer and tension-compression sensor record;
(6) by temperature control heating system, coal petrography sample 33 is heated (rate of heat addition is 10 DEG C/h), (normal temperature when the set temperature is reached; 50 DEG C-600 DEG C, 50 DEG C, interval), coal petrography sample 33 is incubated, and increases coal petrography sample axial load (axial load increment is 20KN) to different set axial load value, when reaching maximum setting shaft to load value, stops experiment; The acoustic emission signal in coal petrography sample 33 compression process is measured, coal petrography sample 33 phase-change product corresponding during axially different load value under utilization gas sampling system collection certain predetermined confined pressure by calibrate AE sensor 25.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a multifunctional high-temperature high pressure three axle coal petrography test unit, is characterized in that: comprise loading system, temperature control heating system, acoustic emission system, gas sampling system, insulation and hermetically-sealed construction and cooling system:
Described loading system comprises pedestal, lower loading unit, confined pressure loading unit and upper loading unit;
Described pedestal comprises base (21), two support posts (1) be symmetricly set on base (21), be horizontally fixed on the support (15) of two support post (1) bottoms, be horizontally fixed on the carrier bar (2) on two support post (1) tops; Described support (15) middle part offers through hole;
Described lower loading unit comprises with the hydraulic elevator platform (22) of displacement transducer, the lower compact disk (23) be arranged on hydraulic elevator platform (22), the loading blocks (20) be arranged in lower compact disk (23), T-shaped piece (24) be arranged in loading blocks (20), the push-down head (30) be arranged on T-shaped piece (24), described hydraulic elevator platform (22) is arranged on the middle part of base (21), and the upper surface of described loading blocks (20) is provided with the suitable location structure in the lower end large with T-shaped piece (24);
The ring screw cover (36) that described confined pressure loading unit comprises cylindrical shell (31), is arranged on the circular disk (27) of cylindrical shell (31) interior lower end, is arranged on the A pyrophyllite bisque (29) of circular disk (27) upper end, is arranged on the salt ring (11) of A pyrophyllite bisque (29) upper end, is arranged on the B pyrophyllite bisque (34) of salt ring (11) upper end, is arranged on B pyrophyllite bisque (34) upper end, coal petrography sample (33) is arranged in cylindrical shell (31);
Described upper loading unit comprises seaming chuck (35), the A cylinder briquetting (9) be arranged on seaming chuck (35), the convex block (39) be arranged on A cylinder briquetting (9), with the suitable gland (38) of convex block (39), be arranged on the B intermediate pressing block (3) on convex block (39), the upper compact disk (4) be arranged on B intermediate pressing block (3);
The outer cross section of the outer cross section of described circular disk (27), the outer cross section of A leaf paraffin bisque (29), salt ring (11) is identical with the interior cross sectional shape of cylindrical shell (31) corresponding position with the outer cross section of B leaf paraffin bisque (34), the interior cross section of the interior cross section of the xsect of the xsect of the upper end that shape of through holes, T-shaped piece (24) at support (15) middle part are little, the xsect of push-down head (30), coal petrography sample (33), the xsect of seaming chuck (35), circular disk (27), the interior cross section of A leaf paraffin bisque (29), salt ring (11), the interior cross sectional shape of B leaf paraffin bisque (34) are identical, described T-shaped piece (24) little upper end is successively through the through hole at support (15) middle part, the through hole at circular disk (27) middle part and the through hole at A leaf paraffin bisque (29) middle part, described push-down head (30), coal petrography sample (33), seaming chuck (35) and A cylinder briquetting overlay on the small end face of T-shaped piece (24) from the bottom to top successively, and be placed in A leaf paraffin bisque (29) stacked successively from the bottom to top, salt ring (11), in the passage that B leaf paraffin bisque (34) and ring screw cover (36) are formed jointly, described coal petrography sample (33) comprises the combination set (12) that wraps up around the coal petrography at middle part and coal petrography, described combination set (12) is followed successively by sheet copper from the inside to the outside, micarex, electric resistance alloy sheet and micarex, wherein the upper and lower two ends of electric resistance alloy sheet contact with push-down head (30) with seaming chuck (35) respectively, described A leaf paraffin bisque (29), salt ring (11), B leaf paraffin bisque (34) and A cylinder briquetting (9) are placed in cylindrical shell (31), and described ring screw cover (36) is outside to be threaded connection with cylindrical shell (31) upper end, the lower end of described cylindrical shell (31) and support (15) are fixed, the large lower end of described convex block (39) covers the upper port of cylindrical shell (31), and being fixed on cylindrical shell (31) by gland (38), described upper compact disk (4) is fixed with carrier bar (2), (2) are provided with tension-compression sensor to described carrier bar,
Described temperature control heating system comprises electric resistance alloy sheet, salt ring (11), the thermocouple needle (32) be arranged in salt ring (11), intelligent temperature control instrument (41) and bidirectional triode thyristor (42) in heating electrode plates (18), combination set (12); Described heating electrode plates (18) is placed between loading blocks (20) and lower compact disk (23), and contact with loading blocks (20) bottom surface, and be separated with heat resistance insulating sheet (19) between lower compact disk (23); Output signal access intelligent temperature control instrument (41) of described thermocouple needle (32), the bidirectional triode thyristor (42) on described intelligent temperature control instrument (41) controls heating electrode plates (18);
Described acoustic emission system comprises the calibrate AE sensor (25) being arranged on loading blocks (20) side;
Described gas sampling system comprises high temperature resistant stainless steel pipe (5), gas sampler (13), be arranged on the gas sampling bag (14) on gas sampler, described high temperature resistant stainless steel pipe (5) is arranged on gland (38), the gas that under High Temperature High Pressure effect, coal petrography phase transformation produces is successively by the through hole on seaming chuck (35), gap between seaming chuck (35) and A cylinder briquetting (9) surface of contact, the through hole at A cylinder briquetting (9) middle part, the end face radial hole that the convex block (39) be connected with the through hole at A cylinder briquetting (9) middle part is large, gap between convex block (39) and gland (38) surface of contact, through hole on gland (38) and enter in high temperature resistant stainless steel pipe (5), and led to gas sampler (13),
Described insulation and hermetically-sealed construction comprise the A micarex (40) be arranged between convex block (39) and B intermediate pressing block (3), be arranged on the heat resistance insulating sheet (19) between lower compact disk (23) and heating electrode plates (18), be arranged on the A red copper pad (6) between convex block (39) and gland (38) step surface, be arranged on the B red copper pad (8) between gland (38) and cylindrical shell (31) surface of contact, be arranged on the C red copper pad (28) between T-shaped piece (24) and push-down head (30) surface of contact, be arranged on the D red copper pad (16) between support (15) and cylindrical shell (31) surface of contact, be arranged on the high temperature high voltage resistant YX RunddichtringO (26) between support (15) and T-shaped piece (24),
Described cooling system comprises the A cooling water pipe (7) being wrapped in high temperature resistant stainless steel pipe (5) outside and the B cooling water pipe (10) being wrapped in cylindrical shell (31) outside.
2. multifunctional high-temperature high pressure three axle coal petrography test unit according to claim 1, it is characterized in that: the lower end of described cylindrical shell (31) is fixed by A sunk screw (17) and support (15), described gland (38) is fixed by B sunk screw (37) and cylindrical shell (31), all scribbles high-temperature insulation glue at the head of convex block (39) and gland (38) step surface engagement edge, A sunk screw (17) and B sunk screw (37).
3. multifunctional high-temperature high pressure three axle coal petrography test unit according to claim 1, is characterized in that: described hydraulic elevator platform is the hydraulic elevator platform that WEW-600 microcomputer controls screen display universal testing machine.
4. a multifunctional high-temperature high pressure three axle coal petrography test method, is characterized in that: comprise the steps:
(1) support (15) is arranged on two support posts (1), T-shaped piece (24), through the support (15) being provided with high temperature high voltage resistant YX RunddichtringO, it is upper and located by location structure that T-shaped piece (24) large lower end is placed in loading blocks (20); Described loading blocks (20) is placed in lower compact disk (23), arranges heating electrode plates (18) and heat resistance insulating sheet (19) between loading blocks (20) and lower compact disk (23); Calibrate AE sensor (25) is placed in the side of loading blocks (20);
(2) circular disk (27) is enclosed within T-shaped piece (24), C red copper pad (28) and push-down head (30) are positioned on T-shaped piece (24) successively, by A sunk screw (17), cylindrical shell (31) is fixed on support (15), the head of described A sunk screw (17) all scribbles high-temperature insulation glue, is lined with D red copper pad (16) between cylindrical shell (31) and support (15); A leaf paraffin powder (29) is put into the annular gap between cylindrical shell (31) and push-down head (30); Coal petrography sample (33) is positioned on push-down head (30), then salt (11) is put into the annular gap between cylindrical shell (31) and coal petrography sample (33), and thermocouple needle (32) is imbedded salt ring (11), the wire of thermocouple needle (32) is drawn in (11) compacting of salt ring; Seaming chuck (35) is positioned on coal petrography sample (33), then B leaf paraffin powder (34) is put into the annular gap between cylindrical shell (31) and seaming chuck (35); By dial torque wrench, ring screw cover (36) is screwed in cylindrical shell (31), until compression B pyrophyllite bisque (34) is to certain depth, preset coal petrography confined pressure size to calculate by moment of torsion conversion, then A cylinder briquetting (9) is put into ring screw cover (36) endoporus;
(3) convex block (39) is placed in cylindrical shell (31) upper end, gland (38) is enclosed within convex block (39), and being fixed on cylindrical shell (31) by B sunk screw (37), the head of described B sunk screw (37) all scribbles high-temperature insulation glue; A red copper pad (6) is set between convex block (39) and gland (38) step surface, B red copper pad (8) is set between cylindrical shell (31) and gland (38) surface of contact, A micarex (40) is set between convex block (39) and B intermediate pressing block (3);
(4) the extraction wire of thermocouple needle (32) is connected on intelligent temperature control instrument (41), is controlled the size of the upper electric current of heating electrode plates (18) by bidirectional triode thyristor (42); Gas coal petrography phase transformation under High Temperature High Pressure effect produced is drawn by high temperature resistant stainless steel pipe (5), gathers via gas sampler (13) and gas sampling bag (14); In the outer felt of cylindrical shell (31) around B cooling water pipe (10), in the outer felt of high temperature resistant stainless steel pipe (5) around A cooling water pipe (7);
(5) by the mobile lower compact disk (23) of hydraulic elevator platform (22), make coal petrography sample (33) be depressed into initial setting axial load, coal rock deformation amount and axial load value size are respectively by displacement transducer and tension-compression sensor record;
(6) by temperature control heating system, coal petrography sample (33) is heated, when the set temperature is reached, coal petrography sample (33) is incubated, and increases coal petrography sample axial load to different set axial load value, when reaching maximum setting shaft to load value, stop experiment; The acoustic emission signal in coal petrography sample (33) compression process is measured, coal petrography sample (33) phase-change product corresponding during axially different load value under utilization gas sampling system collection certain predetermined confined pressure by calibrate AE sensor (25).
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