CN100570325C - Coal rheology seepage flow test device - Google Patents
Coal rheology seepage flow test device Download PDFInfo
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- CN100570325C CN100570325C CNB2007100932400A CN200710093240A CN100570325C CN 100570325 C CN100570325 C CN 100570325C CN B2007100932400 A CNB2007100932400 A CN B2007100932400A CN 200710093240 A CN200710093240 A CN 200710093240A CN 100570325 C CN100570325 C CN 100570325C
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Abstract
A kind of coal rheology seepage flow test device, be used for the rheology test of coal and hazardous rock and the seepage tests in the rheology process, main by in the pressure chamber of rheological test device, centring means being set, this centring means is formed by connecting through positioning screw by last centering disk and following centering disk, the center of last centering disk and following centering disk has circular hole, and described upper holder block and lower lock block are installed in respectively in the center hole of centering disk and following centering disk; Be equipped with cushion block between described upper holder block, lower lock block and the gum cover, this cushion block is provided with first air flue of up/down perforation, and an end of cushion block links to each other with described gum cover, and the other end of this cushion block links to each other with the end of corresponding briquetting.The present invention is mainly by being provided with centring means in the pressure chamber of rheological test device, can not rock after coal sample is put into, and avoids damaging coal sample, coal sample survival rate and stability are improved greatly, thereby, rheological test device more originally, the measured test figure of the present invention is more reliable.
Description
Technical field
The present invention relates to a kind of rheological test device, specifically, relate to the rheology test that is used for coal and hazardous rock and the coal rheology seepage flow test device of the seepage tests in the rheology process.
Background technology
Rheological characteristics is one of important mechanical characteristic of ground class material, and it has very big influence to the long-term strength of rock-soil material.At present, ground class material flowing deformation characteristic has been carried out extensive studies work both at home and abroad.From the laboratory experiment to the engineering analysis, from the experimental formula to the theoretical model, some useful achievements have all been obtained.As a kind rock-soil material, coal petrography also has tangible rheological characteristics.A large amount of field cases show that coal is just relevant with the rheological characteristics of coal containing methane gas with the delay protrusion phenomenon of gas.
By the mode difference of the external load that is applied, the indoor rheological test of soil can be divided into two big class, i.e. direct method and indirect methods.The former is meant the test method that directly applies shearing force, comprises direct shear and twisting test, and the latter utilizes single shaft or three axial compressions to contract or tensile load, comprises one-dimensional consolidation (infiltration) test and triaxial shear test.At different research purposes, research object and research contents, the method for rheological test and instrument and equipment thereof also are diversified.
Main rheological test device all is at soil and rock material at present, and is very rare to the rheological test device of coal and rock especially coal containing methane gas.The triaxial cell of professor's He Xueqiu development mainly is made up of lower cover, the seat of honour and briquetting three parts.Gas enters coal body by the briquetting central passage, is discharged by base.Hydraulic oil enters lower cover by casing wall and is discharged by the seat of honour.Because this device when the loading and unloading coal sample, is connected with base pads briquetting earlier and seals and put into the pressure chamber afterwards by gum cover, the fastening again seat of honour, this process is easy to make coal sample to be destroyed, and makes test findings become very unreliable; Secondly, the gaseous tension of this device lower (less than 2MPa) can not satisfy the site test condition; In addition, present various triaxial rheometers all can't measure the circumferential deformation of the inner sample in pressure chamber, can only measure axial deformation by outside test apparatus.
Summary of the invention
The object of the present invention is to provide a kind of energy to satisfy and contain the coal rheology seepage flow test requirement, and the more reliable coal rheology seepage flow test device of test findings.
For achieving the above object, the present invention is directed to original rheological test device when the loading and unloading coal sample, the defective that coal sample is destroyed, centring means is set in the pressure chamber, can not rock after coal sample is applied and avoid damaging coal sample, concrete technical scheme is as follows: a kind of coal rheology seepage flow test device, comprise lower cover, be installed in the seat of honour of this lower cover upper end, described lower cover axially is provided with the lower inner cavity that opening makes progress, be placed with lower lock block in the lower inner cavity, the lower lock block top is provided with gum cover, on this gum cover, be with cushion block in the lower end is equal, this cushion block is provided with first air flue of up/down perforation, be equipped with in the described gum cover through lead and the extraneous strainometer that communicates, the top of gum cover is provided with upper holder block, this upper holder block and described lower lock block are respectively equipped with inlet channel and exhaust passage, this inlet channel and exhaust passage one communicates with described gum cover inside through described first air flue, the other end of this inlet channel and exhaust passage communicates with air intake opening and exhausr port on being installed in described lower cover through conduit respectively, be respectively equipped with oil inlet passage and drain hole on the described lower cover and the seat of honour, the described seat of honour is provided with the last inner chamber that Open Side Down, should go up inner chamber communicates with described lower inner cavity, described upper holder block and gum cover all are positioned at inner chamber on this, should go up in the inner chamber and also be provided with centring means, this centring means is made up of following centering disk that is installed in described lower inner cavity port and the last centering disk above positioning screw is installed in this time centering disk, the center of last centering disk and following centering disk has circular hole, described upper holder block and lower lock block are installed in respectively in the center hole of centering disk and following centering disk, are equipped with aperture on the annulus of described upward centering disk and following centering disk; Place pressure head on the described upper holder block, the top of this pressure head links to each other with the lower end of pressurizing piston bar, and stretch out from the middle part at the described seat of honour upper end of this pressurizing piston bar, is provided with packoff between the pressurizing piston bar and the seat of honour.During test, earlier coal sample is put into gum cover, connect also banding with cushion block with pipe collar after being put into the centring means center then, whole dress sample process is convenient and simple, has avoided the damage of coal sample; And the inner chamber that the present invention is loaded onto by lower cover, the seat of honour is formed the pressure chamber, the installation before the convenient like this test jointly.
As preference, described upper holder block and lower lock block are installed with the gas joint at an end that joins with described cushion block, corresponding second air flue that communicates with described first air flue that is provided with on this gas joint, and, the joint of two gas joints and described upper holder block, lower lock block is equipped with chamber, and described inlet channel and exhaust passage communicate with described second air flue through this chamber.After the purpose that the joint of gas joint and briquetting increases chamber is to make the gas dispersion that enters from inlet channel, enter in the coal sample by second air flue and first air flue, after flowing through coal sample, be pooled in the chamber through second air flue and first air flue equally, get rid of through the exhaust passage, help the real simulated actual environment, increase the reliability of experimental result.
As preference, the lower end of described pressurizing piston bar is the sphere arc, and the upper end of described pressure head cooperates with this sphere arc is provided with spherical groove, and the lower end of described pressurizing piston bar is in hanging ring is fixed on this spherical groove.The pressurizing piston bar connects by sphere is universal with pressure head, has avoided the bias voltage of coal sample, and experimental result more can reflect the true stressing conditions of coal sample.
As preference, radially be provided with the fairlead that communicates with this lower cover inner chamber on the described lower cover, be provided with the sealing screw rod in the fairlead, the middle part of sealing screw rod is hollow, described lead passes outside the hydraulic cylinder through the sealing screw rod.By lead internal sensor signal is spread out of outside the cylinder body, receive so that monitor the distortion of test specimen in all directions by strainmeter.
As preference, described packoff is made up of the gland that is sleeved on orienting sleeve on the described pressurizing piston bar and this orienting sleeve upper end and the O-ring seal of lower end, and this gland is installed in the top at the seat of honour through screw, and the inwall of this gland is equipped with dust ring.The sealing device not only can play sealing function to reaction unit, but also can play the guiding role to the pressurizing piston bar, has guaranteed that the pressurizing piston bar is stable to exert pressure.
As preference, the lower end of above-mentioned lower lock block is provided with gravity sensor, and the lead of this gravity sensor through passing described sealing screw rod communicates with the external world.At any time monitor the suffered axis pressure of coal sample by gravity sensor, experimentation is more accurate.
Beneficial effect:
(1) the present invention is mainly by being provided with centring means in the pressure chamber of rheological test device, can not rock after coal sample is put into, and avoids damaging coal sample, coal sample survival rate and stability are improved greatly, thereby, rheological test device more originally, the measured test figure of the present invention is more reliable;
(2) connect by the Universal-head sphere between pressurizing piston bar and the coal sample cushion block, can avoid coal sample to produce bias voltage, increased the accuracy of test.
(3) independent gas circuit of high pressure sealing makes gaseous tension can reach 6Mpa.
Further the present invention is illustrated below in conjunction with drawings and Examples:
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the vertical view at the embodiment of the invention seat of honour 9;
Fig. 3 is the vertical view of embodiment of the invention lower cover 1;
Fig. 4 is the structural representation of centering disk 7 on the embodiment of the invention;
Fig. 5 is the upward view of Fig. 4;
Fig. 6 is the structural representation of centering disk 5 under the embodiment of the invention;
Fig. 7 is the upward view of Fig. 6;
Fig. 8 is the wiring layout of the solid sampling device of the embodiment of the invention and upper holder block 20, lower lock block 21;
Fig. 9 is the constitutional diagram of embodiment of the invention lower lock block 21 and gas joint 30;
Figure 10 is the vertical view of Fig. 9;
Figure 11 is the zoomed-in view at I place among Fig. 9;
Figure 12 is the structural representation of embodiment of the invention cushion block 31;
Figure 13 is the vertical view of Figure 12.
Embodiment
As shown in Figure 1, structural representation for the embodiment of the invention, hydraulic cylinder is connected to form through bolt by lower cover 1 and the seat of honour 9, lower cover 1 and the seat of honour 9 joints are equipped with O RunddichtringO 4, lower cover 1 axially is provided with the lower inner cavity 26 that opening makes progress, the described seat of honour 9 is provided with the last inner chamber 25 that Open Side Down, should go up inner chamber 25 communicates with described lower inner cavity 26, should go up the pressure chamber of inner chamber 25 and described lower inner cavity 26 formation hydraulic cylinders, the bottom of this pressure chamber is equipped with pressure-bearing post 2, LOAD CELLS 29 is installed on the pressure-bearing post 2, above this pressure-bearing post 2, upper holder block 20 is installed, lower lock block 21 and this upper holder block 20, solid sampling device between the lower lock block 21, as shown in Figure 8, have inlet channel 20a on the upper holder block 20, this inlet channel 20a is connected with air intake opening 22 on being installed in lower cover 1 through conduit 28 at the port on upper holder block 20 walls, the another port of inlet channel 20a is arranged in the groove of upper holder block 20 lower ends, as Fig. 9 and shown in Figure 10, the lower end of upper holder block 20 is welded with gas joint 30, the upper end of this gas joint 30 and upper holder block 20 have groove opposite to each other, gas joint 30 be provided with some perforation gas joints 30 and communicate with its groove second air flue 32, the groove of the groove of gas joint 30 upper ends and described upper holder block 20 lower ends forms chamber 38 jointly, and described inlet channel 20a communicates with described second air flue 32 through this chamber 38; Lower lock block 21 is identical with the structure of upper holder block 20, exhaust passage 21a on this lower lock block 21 is connected with exhausr port 3 on being installed in lower cover 1 through conduit 28 at the port on lower lock block 21 walls, and the two ends of described conduit 28 are connected with other parts by two-way joint 33; Described solid sampling device is by on gum cover 6 and this gum cover 6, the cushion block 31 of cover is formed in the lower end, on the gum cover 6, the lower end is sleeved on the cushion block 31, then through cranse 35 bandings, splendid attire coal sample in the gum cover 6, the inside and outside wall of gum cover 6 all is equipped with strainometer 27, as Figure 12, Figure 13, on the cushion block 31 with described gas joint 30 on relative first air flue 36 that has up/down perforation of second air flue 32, this first air flue 36 and described second air flue 32 are with described inlet channel 20a, the internal communication of exhaust passage 21a and gum cover 6, cushion block 31 is equipped with O RunddichtringO 37 with described gas joint 30 joints, like this, from air intake opening 22 to gum cover 6, arrive the independent gas circuit that exhausr port 3 forms a high pressure sealing then, make gaseous tension can reach 6MPa, can in coal sample, charge into nitrogen, oxygen, all gases such as carbon dioxide and methane.
As Fig. 1, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, Gu the outer cover of sampling device is equipped with centring means, this centring means is by following centering disk 5, last centering disk 7 and positioning screw 8 are formed, the lower end of following centering disk 5 is provided with boss, pass through boss, following centering disk 5 just covers on the port of lower inner cavity 26, following centering disk 5 is installed in this time centering disk 5 tops through positioning screw 8, the center of last centering disk 7 and following centering disk 5 has circular hole, described upper holder block 20 and lower lock block 21 are installed in respectively in the center hole of centering disk 7 and following centering disk 5, have 8 apertures equably on the annulus of described upward centering disk 7 and following centering disk 5, this aperture not only can pass described conduit 28, but also hydraulic oil is unimpededly flowed in the pressure chamber.
As Fig. 1, place ball cup 19 on the upper holder block 20, place pressure head 18 on this ball cup 19, the upper end of this pressure head 18 links to each other with the lower end of pressurizing piston bar 11, and the lower end of pressurizing piston bar 11 is the sphere arc, and the upper end of pressure head 18 cooperates with this sphere arc is provided with spherical groove, the lower end of described pressurizing piston bar 11 is in hanging ring 17 is fixed on this spherical groove, the pressurizing piston bar connects by sphere is universal with pressure head, has avoided the bias voltage of coal sample, and experimental result more can reflect the true stressing conditions of coal sample.Stretch out from the middle part at the described seat of honour 9 upper end of pressurizing piston bar 11, pressurizing piston bar 11 is set with orienting sleeve 15 with the seat of honour 9 contact portions, the upper and lower end of this orienting sleeve 15 is separately installed with gland 14 and O-ring seal 16, gland 14 is installed in the top at the seat of honour 9 through screw, the inwall of this gland 14 is equipped with dust ring 13, and the top of pressurizing piston bar 11 is equipped with the nut 12 that hoists; Lower cover 1 is provided with oil inlet passage 23, this oil inlet passage 23 communicates with the inner cavity chamber of described hydraulic cylinder, and oil inlet passage 23 is connected with the servo-hydraulic oil pump, by this oil inlet passage 23 oiling in the pressure chamber, after experiment is finished, the oil in the hydraulic cylinder is discharged by oil inlet passage 23 and drain hole 10.
As shown in Figure 3, radially be provided with 8 fairleads that communicate with the downforce chamber of hydraulic cylinder on the described lower cover 1, be provided with sealing screw rod 24 in the fairlead, the middle part of sealing screw rod 24 is hollow, the lead that connects on described strainometer and the LOAD CELLS passes outside the hydraulic cylinder through sealing screw rod 24, links to each other with watch-dog.
The operating process of the embodiment of the invention is:
1, earlier coal sample is put into gum cover 6 usefulness hair driers and blow tightly, be put into then behind the centring means center with pipe collar 35 and connect also banding with cushion block 31 with anti-gas-leak and leakage of oil.
2, connect gas circuit, might leak gas or silica gel is evenly smeared in leakage of oil place.
3, outside coal sample gum cover 6, lay foil gauge meter 27, and connect with extension line.
4, put down the seat of honour, pressure chamber 9 and tighten sealed screw.
5, air dry is 24 hours.
5, the starting motorized cart is delivered to the pressure chamber under the experimental machine of Tianjin, island, and the starting oil supply system is treated to close the oil extraction vent valve after the emptying of pressure room air.
6, increase confined pressure, start Tianjin, island experimental machine simultaneously and increase axial compression under certain pressure, enter the rheology process.
7, the starting feeder keeps certain gas pressure.Coal sample promptly is in a kind of rheology seepage flow state in the pressure chamber at this moment.
Claims (6)
1. coal rheology seepage flow test device, comprise lower cover (1), be installed in the seat of honour (9) of this lower cover (1) upper end, described lower cover (1) axially is provided with the lower inner cavity (26) that opening makes progress, be placed with lower lock block (21) in the lower inner cavity (26), lower lock block (21) top is provided with gum cover (6), on this gum cover (6), be with cushion block (31) in the lower end is equal, this cushion block (31) is provided with first air flue (36) of up/down perforation, be equipped with in the described gum cover (6) through lead and the extraneous strainometer (27) that communicates, the top of gum cover (6) is provided with upper holder block (20), this upper holder block (20) is respectively equipped with inlet channel (20a) and exhaust passage (21a) with described lower lock block (21), this inlet channel (20a) and exhaust passage (21a) one communicates with described gum cover (6) inside through described first air flue (36), the other end of this inlet channel (20a) and exhaust passage (21a) communicates with air intake opening (22) and exhausr port (3) on being installed in described lower cover (1) through conduit (28) respectively, be respectively equipped with oil inlet passage (23) and drain hole (10) on described lower cover (1) and the seat of honour (9), it is characterized in that: the described seat of honour (9) are provided with the last inner chamber (25) that Open Side Down, should go up inner chamber (25) communicates with described lower inner cavity (26), described upper holder block (20) and gum cover (6) all are positioned at inner chamber on this (25), should go up in the inner chamber (25) and also be provided with centring means, this centring means is made up of following centering disk (5) that is installed in described lower inner cavity (26) port and the last centering disk (7) above positioning screw (8) is installed in this time centering disk (5), the center of last centering disk (7) and following centering disk (5) has circular hole, described upper holder block (20) and lower lock block (21) are installed in respectively in the center hole of centering disk (7) and following centering disk (5), are equipped with aperture on the annulus of described upward centering disk (7) and following centering disk (5); Described upper holder block (20) is gone up and is placed pressure head (18), the top of this pressure head (18) links to each other with the lower end of pressurizing piston bar (11), stretch out from the middle part of the described seat of honour (9) upper end of this pressurizing piston bar (11), is provided with packoff between pressurizing piston bar (11) and the seat of honour (9).
2. coal rheology seepage flow test device according to claim 1, it is characterized in that: described upper holder block (20) and lower lock block (21) are installed with gas joint (30) at an end that joins with described cushion block (31), this gas joint (30) is gone up correspondence and is provided with second air flue (32) that communicates with described first air flue (36), and, two gas joints (30) are equipped with chamber (38) with the joint of described upper holder block (20), lower lock block (21), and described inlet channel (20a) and exhaust passage (21a) communicate with described second air flue (32) through this chamber (38).
3. coal rheology seepage flow test device according to claim 1, it is characterized in that: the lower end of described pressurizing piston bar (11) is the sphere arc, the upper end of described pressure head (18) cooperates with this sphere arc is provided with spherical groove, and the lower end of described pressurizing piston bar (11) is fixed in this spherical groove through hanging ring (17).
4. coal rheology seepage flow test device according to claim 1, it is characterized in that: radially be provided with the fairlead that communicates with this lower cover (1) lower inner cavity (26) on the described lower cover (1), be provided with sealing screw rod (24) in the fairlead, the middle part of sealing screw rod (24) is hollow, and described lead passes outside the hydraulic cylinder through sealing screw rod (24).
5. coal rheology seepage flow test device according to claim 1, it is characterized in that: described packoff is made up of the gland (14) that is sleeved on orienting sleeve (15) on the described pressurizing piston bar (11) and this orienting sleeve (15) upper end and the O-ring seal (16) of lower end, this gland (14) is installed in the top of the seat of honour (9) through screw, and the inwall of this gland (14) is equipped with dust ring (13).
6. coal rheology seepage flow test device according to claim 4 is characterized in that: the lower end of described lower lock block (21) is provided with gravity sensor, and the lead of this gravity sensor through passing described sealing screw rod (24) communicates with the external world.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100932400A CN100570325C (en) | 2007-12-28 | 2007-12-28 | Coal rheology seepage flow test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100932400A CN100570325C (en) | 2007-12-28 | 2007-12-28 | Coal rheology seepage flow test device |
Publications (2)
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| CN101216405A CN101216405A (en) | 2008-07-09 |
| CN100570325C true CN100570325C (en) | 2009-12-16 |
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| CNB2007100932400A Expired - Fee Related CN100570325C (en) | 2007-12-28 | 2007-12-28 | Coal rheology seepage flow test device |
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Families Citing this family (14)
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| CN101608545B (en) * | 2009-07-20 | 2010-12-08 | 中国矿业大学(北京) | Method and device for testing gas migration process in coal rock mass |
| CN102128741A (en) * | 2010-11-23 | 2011-07-20 | 山东大学 | Triaxial rheological test process and method for hard and crisp rock |
| CN102928570B (en) * | 2012-10-24 | 2014-08-13 | 河南理工大学 | Sealing device for gas-containing coal sample used under triaxial compression experiment conditions |
| CN103743634B (en) * | 2014-01-24 | 2016-01-06 | 重庆大学 | Fluid structure interaction coal rock shear-seepage test fluid pressure-loaded shear box |
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| CN106353238A (en) * | 2016-10-31 | 2017-01-25 | 贵州大学 | Auxiliary device for permeability test of shale sample |
| CN108871905B (en) * | 2018-08-20 | 2020-08-04 | 山东科技大学 | Test method for influence of bedding surface roughness on deformation and permeability of mining coal seam |
| CN110132746B (en) * | 2019-06-19 | 2024-05-10 | 四川大学 | Indoor experimental simulation device and method for performing geological fault mechanical behaviors by triaxial tester |
| CN110618072A (en) * | 2019-09-06 | 2019-12-27 | 河南工程学院 | Coal body crack monitoring-gas permeation experimental device |
| CN110927042B (en) * | 2019-12-09 | 2022-11-11 | 河北工程大学 | Fracture seepage experimental apparatus for coal mine |
| CN110927045B (en) * | 2019-12-25 | 2020-09-25 | 重庆大学 | Long coal petrography sample gas-liquid seepage pressure chamber |
| CN112179748B (en) * | 2020-10-12 | 2023-06-09 | 河南理工大学 | CT triaxial experiment sample loading method for coal rock sample |
| CN113495048B (en) * | 2021-09-08 | 2021-11-16 | 南通华兴石油仪器有限公司 | High-pressure seepage test device |
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| US5025669A (en) * | 1989-06-28 | 1991-06-25 | Institut Francais Du Petrole | Device for carrying out stress tests on rock sample and other materials |
| US5226310A (en) * | 1990-08-31 | 1993-07-13 | Exxon Production Research Company | Methods and apparatuses for measurement of the strengths, pore pressures, and mechanical properties of low permeability geologic materials |
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Patent Citations (5)
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|---|---|---|---|---|
| EP0349422A1 (en) * | 1988-06-30 | 1990-01-03 | Institut Français du Pétrole | Cell for performing triaxial stress tests on a rock sample, and test method using such a cell |
| EP0371877A1 (en) * | 1988-11-30 | 1990-06-06 | Elf Aquitaine Production | Device for measuring the flow of fluid through a porous body |
| US5025669A (en) * | 1989-06-28 | 1991-06-25 | Institut Francais Du Petrole | Device for carrying out stress tests on rock sample and other materials |
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| CN201170769Y (en) * | 2007-12-28 | 2008-12-24 | 重庆大学 | Ingredient rheology infiltration flow tester |
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