CN102445382A - High-temperature triaxial test pressure transmitting solid preassembling mechanism and method - Google Patents
High-temperature triaxial test pressure transmitting solid preassembling mechanism and method Download PDFInfo
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- CN102445382A CN102445382A CN2011104474060A CN201110447406A CN102445382A CN 102445382 A CN102445382 A CN 102445382A CN 2011104474060 A CN2011104474060 A CN 2011104474060A CN 201110447406 A CN201110447406 A CN 201110447406A CN 102445382 A CN102445382 A CN 102445382A
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Abstract
The invention provides a high-temperature triaxial test pressure transmitting solid preassembling mechanism and method. The preassembling mechanism mainly comprises a high-temperature pressure chamber, a central cylinder pressure head, a lateral cylinder pressure head, a bottom cylinder pressure head, an axial pressure head, a confining pressure sleeve, an upper pressure head and a lower pressure head, wherein the bottom cylinder pressure head is positioned below the high-temperature pressure chamber, has a diameter slightly less than the inner diameter of the high-temperature pressure chamber, and can pass through the high-temperature pressure chamber; the lateral cylinder pressure head and the central cylinder pressure head are positioned above the high-temperature pressure chamber; the annular outer diameter of the lateral cylinder pressure head is slightly less than the inner diameter of the high-temperature pressure chamber, and can pass through the high-temperature pressure chamber; the central cylinder pressure head is positioned inside the lateral cylinder pressure head, and can pass through the lateral cylinder pressure head; the bottom cylinder pressure head supports a test sample and a pressure transmitting solid; the central cylinder pressure head is used for compressing and fixing the test sample; and the pressure transmitting solid is compacted by repeatedly loading of the lateral cylinder pressure head. Therefore, the pressure transmitting solid preassembling speed is improved, the pressure transmitting solid which is preassembled is compact and firm, the pressurization amount is reduced, and the test accuracy is improved. The high-temperature triaxial test pressure transmitting solid preassembling mechanism has the advantages of compact and simple structure, easiness in operation, convenience in preassembly and good insulating and heat isolation effects.
Description
Technical field
The present invention relates to a kind of high temperature triaxial test pressure transmission solid prepackage mechanism and method, be particularly useful for the triaxial test of HTHP.
Background technology
The development of rock mechanics is to be accompanied by the development of testing machine and independent with the mechanics of materials gradually all the time, and development, grows up and ripe.In early days; The common material testing machine is adopted in the test of rock mechanics fully; Afterwards, along with the succeeding in developing of various large-scale implosion test machines carried out a large amount of relevant experimental studies, disclosed the characteristic many rarely known by the people of rock, rock mass; Promoted the rock mechanics subject development greatly, become the new branch of science of material impact is arranged in the national economy.Confined pressure triaxial test machine is a kind of as large-scale implosion test machine, has brought into play irreplaceable effect, and its sample dimensions is big, functional diversities, but the prepackage process of its pressure transmission solid is but very difficult, especially under needs insulation and heat insulation situation.
Summary of the invention
Technical matters: the objective of the invention is to overcome the weak point in the prior art, provide a kind of high temperature triaxial test pressure transmission solid simple in structure, that pre-install convenience, insulation and good heat-insulation effect to pre-install mechanism and method.
Technical scheme: high temperature triaxial test pressure transmission solid of the present invention is pre-installed mechanism; It comprises high temperature pressure chamber, axial compression head, confined pressure cover, push-down head, seaming chuck; Described high temperature pressure chamber interior is provided with the cylindrical cavity that runs through the high temperature pressure chamber; The bottom of high temperature pressure chamber is positioned at that place, aperture under the cylindrical cavity is provided with and the moving end cylinder pressure head that is slidingly matched of cylindrical cavity, and end cylinder ram travel can run through whole high temperature pressure chamber; The top of high temperature pressure chamber is positioned on the cylindrical cavity of high temperature pressure chamber the place, aperture and is provided with the hollow side cylinder pressure head that is slidingly matched with cylindrical cavity, and the hollow diameters internal clearance of hollow side cylinder pressure head is provided with the central cylinder pressure head; Side, below, described high temperature pressure chamber has radially spacing hole.
Described hollow side cylinder pressure head is made up of annular pressure head, 4 fins, and the circumference of annular pressure head is provided with a plurality of guide grooves; The hollow diameters of described hollow side cylinder pressure head is 220mm; Have on the described confined pressure cover sidewall with high temperature pressure chamber lower side face diameter to the identical fixed orifice of spacing hole diameter.
High temperature triaxial test pressure transmission solid preassemble method of the present invention comprises the steps:
A, will be under the cylindrical cavity of end cylinder loss in head to high-temperature high-pressure power chamber the place, aperture, on the indoor cavity inner wall of high temperature pressure, evenly smear Hmp grease;
B, end cylinder pressure head is risen on the cylindrical cavity of high temperature pressure chamber 20cm place, below, aperture, the confined pressure cover of inwardly packing into earlier, the axial compression head of in confined pressure is overlapped, packing into;
C, control end cylinder pressure head descend, and make an axial compression upper surface parallel with high temperature pressure chamber upper surface, and push-down head is placed on the axial compression head; The end cylinder pressure head that descends once more makes the push-down head upper surface parallel with the upper surface of high temperature pressure chamber, and test specimen is placed on the push-down head; And then the end cylinder pressure head that descends; Make the upper surface of test specimen parallel, afterwards, on test specimen, lay seaming chuck with the upper surface of high temperature pressure chamber;
D, the end cylinder pressure head that rises, it is outside to make laboratory sample all expose high temperature pressure chamber cavity;
E, decline central cylinder pressure head, and observe the movement position of central cylinder pressure head through the gap location between the fin when central cylinder pressure head during near seaming chuck, are used slow decline central cylinder pressure head instead, until being fixed test specimen, it are not rocked;
F, in test specimen outer wrap resistance alloys sheet and insulated thermal insulating layer;
G, first rising central cylinder pressure head rise to 20cm place, below, aperture on the cylindrical cavity of high temperature pressure chamber with end cylinder pressure head again;
H, repeating step e;
I, in the space that high temperature pressure chamber cavity and confined pressure cover, axial compression head, push-down head, test specimen, seaming chuck are surrounded, repeatedly insert pyrophyllite powder; Whenever insert pyrophyllite powder applies 10MPa through the side pressure cylinder pressure; Pressurize 30 minutes is full of the side pressure solid in the space that is surrounded;
J, make side cylinder pressure head push down the side pressure solid; End cylinder pressure head, central cylinder pressure head, side pressure cylinder link descending; The side pressure solid that makes confined pressure cover, axial compression head, push-down head, test specimen, seaming chuck and installed is whole to descend; Abdicate the prepackage space, setting adds partiting thermal insulation material, repeating step i on the high temperature pressure chamber interior walls;
K, when side pressure solid filling to laboratory sample below 2cm place; Change pyrophyllite powder into salt and continue to load, in the prepackage process, when the lower limb of side pressure solid filling to laboratory sample, middle part and coboundary; An armoured thermocouple is set respectively; After filling exceeds laboratory sample coboundary 2cm, change salt into pyrophyllite powder again and continue filling, until the coboundary that is filled to seaming chuck;
M, end cylinder pressure head dropped to fixed orifice that confined pressure puts is alignd with spacing hole on the high temperature pressure chamber, penetrate spacing hole and fixed orifice from the outside, make the confined pressure cover fixing, accomplish the installation of pressure transmission solid with pin.
Beneficial effect: owing to adopted technique scheme, the present invention has reduced personnel's labor capacity effectively, has improved pressure transmission solid prepackage speed, and is fine and close, solid through the pressure transmission solid of prepackage, reduced compressible amount, improved experimental precision greatly.Its compact conformation is simple, and is easy to operate, and prepackage convenience, insulation and good heat-insulation effect have practicality widely.
Description of drawings
Fig. 1 is a side pressure prepackage mechanism structure synoptic diagram of the present invention;
Fig. 2 is a side pressure cylinder structure synoptic diagram of the present invention;
Fig. 3 is A-A sectional structure chart of Fig. 2;
Fig. 4 is a confined pressure nested structure synoptic diagram of the present invention.
Among the figure: 1-high temperature pressure chamber; The 2-spacing hole; 3-axial compression head; 4-confined pressure cover; The 4--1 fixed orifice; The 5-push-down head; The 6-test specimen; The 7-seaming chuck; 8-hollow side cylinder pressure head; 8-1-side pressure head; The 8-2-fin; The 8-3-guide groove, the 9-pyrophyllite powder; 10-salt; 11-central cylinder pressure head; Cylinder pressure head at the bottom of the 12-; 13-red copper radiating tube.
Embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
As shown in Figure 1; High temperature triaxial test pressure transmission solid of the present invention is pre-installed mechanism; Mainly constitute by high temperature pressure chamber 1, axial compression 3, confined pressure cover 4, push-down head 5, seaming chuck 7; 1 inside, described high temperature pressure chamber is provided with the cylindrical cavity that runs through high temperature pressure chamber 1, and the bottom of high temperature pressure chamber 1 is positioned at that place, aperture under the cylindrical cavity is provided with and the moving end cylinder pressure head 12 that is slidingly matched of cylindrical cavity, and end cylinder pressure head 12 strokes can run through whole high temperature pressure chamber 1; The top of high temperature pressure chamber 1 is positioned on 1 cylindrical cavity of high temperature pressure chamber the place, aperture and is provided with the hollow side cylinder pressure head 8 that is slidingly matched with cylindrical cavity; Hollow side cylinder pressure head 8 is made up of annular pressure head 8-1,4 fin 8-2; The circumference of annular pressure head 8-1 is provided with a plurality of guide groove 8-3, and the hollow diameters of hollow side cylinder pressure head 8 is 220mm.The hollow diameters internal clearance of hollow side cylinder pressure head 8 is provided with central cylinder pressure head 11; Side, 1 below, described high temperature pressure chamber has radially spacing hole 2.End cylinder pressure head 12 is positioned at 1 inner chamber bottom, high temperature pressure chamber, and its top is confined pressure cover 4, axial compression 3, push-down head 5, test specimen 6, seaming chuck 7 successively.In the space that axial compression 3, push-down head 5, test specimen 6, seaming chuck 7 and high temperature pressure chamber 1 are surrounded by reaching filling pyrophyllite powder 9, salt 10, pyrophyllite powder 9 successively down.Side pressure cylinder 8 is positioned at top, high temperature pressure chamber with central cylinder pressure head 11, and it can load from top to bottom, and the central cylinder pressure head is pushed down seaming chuck, side pressure cylinder compacting pressure transmission solid.Described confined pressure overlap have on 4 sidewalls with high temperature pressure chamber 1 lower side face diameter to the identical fixed orifice 4-1 of spacing hole 2 diameters.
High temperature triaxial test pressure transmission solid preassemble method of the present invention: at first will reduce to place, aperture under 1 cylindrical cavity of high temperature pressure chamber, and on the cavity inner wall of high temperature pressure indoor 1, evenly smear Hmp grease, and then end cylinder pressure head 12 risen to 20cm place, below, aperture on 1 cylindrical cavity of high temperature pressure chamber at end cylinder pressure head 12; The confined pressure of inwardly packing into earlier cover 4, the axial compression 3 of in confined pressure cover 4, packing into, control end cylinder pressure head 12 descends; Make axial compression 3 upper surface parallel with high temperature pressure chamber 1 upper surface, push-down head 5 is placed in the axial compression 3, end cylinder pressure head 12 once more descends; Make push-down head 5 upper surfaces parallel, test specimen 6 is placed on the push-down head 5 with the upper surface of high temperature pressure chamber 1, and then the end cylinder pressure head 12 that descends; Make the upper surface of test specimen 6 parallel, afterwards, on test specimen 6, lay seaming chuck 7 with the upper surface of high temperature pressure chamber 1; Rising end cylinder pressure head 12, it is outside to make laboratory sample 6 all expose high temperature pressure chamber 1 cavity, decline central cylinder pressure head 11; And observe the movement position of central cylinder pressure head 11 through the gap location between the fin 8-2; When central cylinder pressure head 11 during, use slow decline central cylinder pressure head 11 instead, until being fixed test specimen 6 near seaming chuck 7; It is not rocked; In test specimen 6 outer wrap resistance alloys sheet and insulated thermal insulating layer, first rising central cylinder pressure head 11 rises to 20cm place, below, aperture on 1 cylindrical cavity of high temperature pressure chamber with end cylinder pressure head 12 again; Decline central cylinder pressure head 11; And observe the movement position of central cylinder pressure head 11 through the gap location between the fin 8-2; When central cylinder pressure head 11 during, use slow decline central cylinder pressure head 11 instead, until being fixed test specimen 6 near seaming chuck 7; In the space that high temperature pressure chamber 1 cavity and confined pressure cover 4, axial compression 3, push-down head 5, test specimen 6, seaming chuck 7 are surrounded, repeatedly insert pyrophyllite powder 9; Whenever insert pyrophyllite powder 9 and apply the pressure of 10MPa through side pressure cylinder 8, pressurize 30 minutes is full of the side pressure solid in the space that is surrounded; Make side cylinder pressure head 8 push down the side pressure solid; End cylinder pressure head 12, central cylinder pressure head 11, side pressure cylinder 8 link descending; The whole decline of side pressure solid that makes confined pressure cover 4, axial compression 3, push-down head 5, test specimen 6, seaming chuck 7 and installed; Abdicate the prepackage space, on the high temperature pressure chamber interior walls, be provided with and add the partiting thermal insulation material, repeatedly insert pyrophyllite powder 9 in the space that overlap 4 in high temperature pressure chamber 1 cavity and confined pressure, axial compression 3, push-down head 5, test specimen 6, seaming chuck 7 is surrounded; Whenever insert pyrophyllite powder 9 and apply the pressure of 10MPa, pressurize 30 minutes through side pressure cylinder 8; When 2cm place, side pressure solid filling to laboratory sample 6 below; Change pyrophyllite powder 9 into salt 10 and continue to load, in the prepackage process, when the lower limb of side pressure solid filling to laboratory sample 6, middle part and coboundary; An armoured thermocouple is set respectively; After filling exceeds laboratory sample 6 coboundary 2cm, change salt 10 into pyrophyllite powder 9 again and continue filling, until the coboundary that is filled to seaming chuck 7; End cylinder pressure head 12 dropped to the fixed orifice 4-1 that makes on the confined pressure cover 4 and align, penetrate spacing hole 2 and fixed orifice 14 from the outside, confined pressure cover 4 is fixed, avoid it to drop, the installation of pressure transmission solid with pin with spacing hole 2 on the high temperature pressure chamber 1.
Claims (5)
1. a high temperature triaxial test pressure transmission solid is pre-installed mechanism; It comprises high temperature pressure chamber (1), axial compression head (3), confined pressure cover (4), push-down head (5), seaming chuck (7); It is characterized in that: inside, described high temperature pressure chamber (1) is provided with the cylindrical cavity that runs through high temperature pressure chamber (1); The bottom of high temperature pressure chamber (1) is positioned at that place, aperture under the cylindrical cavity is provided with and the moving end cylinder pressure head (12) that is slidingly matched of cylindrical cavity, and end cylinder pressure head (12) stroke can run through whole high temperature pressure chamber (1); The top of high temperature pressure chamber (1) is positioned on the cylindrical cavity of high temperature pressure chamber (1) place, aperture and is provided with the hollow side cylinder pressure head (8) that is slidingly matched with cylindrical cavity, and the hollow diameters internal clearance of hollow side cylinder pressure head (8) is provided with central cylinder pressure head (11); Side, below, described high temperature pressure chamber (1) has radially spacing hole (2).
2. high temperature triaxial test pressure transmission solid according to claim 1 is pre-installed mechanism; It is characterized in that: described hollow side cylinder pressure head (8) is made up of annular pressure head (8-1), 4 fins (8-2), and the circumference of annular pressure head (8-1) is provided with a plurality of guide grooves (8-3).
3. high temperature triaxial test pressure transmission solid according to claim 1 and 2 is pre-installed mechanism, and it is characterized in that: the hollow diameters of described hollow side cylinder pressure head (8) is 220mm.
4. high temperature triaxial test pressure transmission solid according to claim 1 prepackage mechanism is characterized in that: have on described confined pressure cover (4) sidewall with high temperature pressure chamber (1) lower side face diameter to the identical fixed orifice (4-1) of spacing hole (2) diameter.
5. a high temperature triaxial test pressure transmission solid preassemble method is characterized in that comprising the steps:
A, will reduce under the cylindrical cavity of high temperature pressure chamber (1) place, aperture, on the cavity inner wall of high temperature pressure indoor (1), evenly smear Hmp grease at end cylinder pressure head (12);
B, end cylinder pressure head (12) is risen on the cylindrical cavity of high temperature pressure chamber (1) 20cm place, below, aperture, the first confined pressure cover (4) of inwardly packing into, the axial compression head (3) of in confined pressure cover (4), packing into;
C, control end cylinder pressure head (12) descend; Make axial compression head (3) upper surface parallel with high temperature pressure chamber (1) upper surface, push-down head (5) is placed on the axial compression head (3), end cylinder pressure head (12) once more descends; Make push-down head (5) upper surface parallel with the upper surface of high temperature pressure chamber (1); Test specimen (6) is placed on the push-down head (5), and then the end cylinder pressure head (12) that descends, make the upper surface of test specimen (6) parallel with the upper surface of high temperature pressure chamber (1); Afterwards, on test specimen (6), lay seaming chuck (7);
D, the end cylinder pressure head (12) that rises, it is outside to make laboratory sample (6) all expose high temperature pressure chamber (1) cavity;
E, decline central cylinder pressure head (11); And observe the movement position of central cylinder pressure head (11) through the gap location between the fin (8-2); When central cylinder pressure head (11) during near seaming chuck (7); Use slow decline central cylinder pressure head (11) instead,, it is not rocked until being fixed test specimen (6);
F, in test specimen (6) outer wrap resistance alloys sheet and insulated thermal insulating layer;
G, first rising central cylinder pressure head (11) rise to 20cm place, below, aperture on the cylindrical cavity of high temperature pressure chamber (1) with end cylinder pressure head (12) again;
H, repeating step e;
I, in the space that high temperature pressure chamber (1) cavity and confined pressure cover (4), axial compression head (3), push-down head (5), test specimen (6), seaming chuck (7) are surrounded, repeatedly insert pyrophyllite powder (9); Whenever insert a pyrophyllite powder (9) applies 10MPa through side pressure cylinder (8) pressure; Pressurize 30 minutes is full of the side pressure solid in the space that is surrounded;
J, make side cylinder pressure head (8) push down the side pressure solid; End cylinder pressure head (12), central cylinder pressure head (11), side pressure cylinder (8) link descending; The side pressure solid that makes confined pressure cover (4), axial compression head (3), push-down head (5), test specimen (6), seaming chuck (7) and installed is whole to descend; Abdicate the prepackage space, setting adds partiting thermal insulation material, repeating step i on the high temperature pressure chamber interior walls;
K, when side pressure solid filling to laboratory sample (6) below 2cm place; Change pyrophyllite powder (9) into salt (10) and continue to load, in the prepackage process, when the lower limb of side pressure solid filling to laboratory sample (6), middle part and coboundary; An armoured thermocouple is set respectively; After filling exceeds laboratory sample (6) coboundary 2cm, change salt (10) into pyrophyllite powder (9) again and continue filling, until the coboundary that is filled to seaming chuck (7);
M, end cylinder pressure head (12) dropped to the fixed orifice (4-1) that makes on the confined pressure cover (4) and align with spacing hole (2) on high temperature pressure chamber (1); Penetrate spacing hole (2) and fixed orifice (14) from the outside with pin; Make confined pressure cover (4) fixing, accomplish the installation of pressure transmission solid.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900902A (en) * | 2014-04-16 | 2014-07-02 | 西南科技大学 | Laterally constrained rock uniaxial compression test device |
| CN105300807A (en) * | 2015-10-14 | 2016-02-03 | 太原理工大学 | High-temperature true triaxial rock testing machine |
| CN106595467A (en) * | 2016-12-12 | 2017-04-26 | 唐亮 | Geotechnical three-axis experiment sample radial deformation sensor and test method |
| CN108593458A (en) * | 2018-05-30 | 2018-09-28 | 中国矿业大学 | A kind of coal petrography high temperature and pressure deformation detection system |
| CN111351896A (en) * | 2018-12-05 | 2020-06-30 | 重庆大学 | Deep mining mine composite dynamic disaster dynamic effect simulation experiment system |
| CN109870350B (en) * | 2019-03-29 | 2023-10-27 | 中国矿业大学 | Liquid leakage prevention high-temperature high-pressure hydraulic fracturing system and test method |
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| CN102175539A (en) * | 2011-03-11 | 2011-09-07 | 北京交通大学 | Temperature-control pressure chamber system for unsaturated soil tri-axial apparatus |
| CN102539228A (en) * | 2011-12-26 | 2012-07-04 | 中国矿业大学 | High-temperature three-axis test pressure transfer solid pre-loading mechanism and method |
| CN202420961U (en) * | 2011-12-28 | 2012-09-05 | 中国矿业大学 | Pressure transmission solid pre-loading mechanism for high temperature triaxial test |
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- 2011-12-28 CN CN2011104474060A patent/CN102445382A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040244497A1 (en) * | 2001-03-20 | 2004-12-09 | Abdel-Hadi Ali Ismail | Enhanced triaxial tester with volume change device for measurement of flow properties of dry cohesive particulate systems under low confining pressures |
| CN102175539A (en) * | 2011-03-11 | 2011-09-07 | 北京交通大学 | Temperature-control pressure chamber system for unsaturated soil tri-axial apparatus |
| CN102539228A (en) * | 2011-12-26 | 2012-07-04 | 中国矿业大学 | High-temperature three-axis test pressure transfer solid pre-loading mechanism and method |
| CN202420961U (en) * | 2011-12-28 | 2012-09-05 | 中国矿业大学 | Pressure transmission solid pre-loading mechanism for high temperature triaxial test |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900902A (en) * | 2014-04-16 | 2014-07-02 | 西南科技大学 | Laterally constrained rock uniaxial compression test device |
| CN105300807A (en) * | 2015-10-14 | 2016-02-03 | 太原理工大学 | High-temperature true triaxial rock testing machine |
| CN106595467A (en) * | 2016-12-12 | 2017-04-26 | 唐亮 | Geotechnical three-axis experiment sample radial deformation sensor and test method |
| CN108593458A (en) * | 2018-05-30 | 2018-09-28 | 中国矿业大学 | A kind of coal petrography high temperature and pressure deformation detection system |
| CN108593458B (en) * | 2018-05-30 | 2020-09-29 | 中国矿业大学 | Coal petrography high temperature high pressure deformation detecting system |
| CN111351896A (en) * | 2018-12-05 | 2020-06-30 | 重庆大学 | Deep mining mine composite dynamic disaster dynamic effect simulation experiment system |
| CN111351896B (en) * | 2018-12-05 | 2021-07-06 | 山东科技大学 | Deep mining mine composite dynamic disaster dynamic effect simulation experiment system |
| CN109870350B (en) * | 2019-03-29 | 2023-10-27 | 中国矿业大学 | Liquid leakage prevention high-temperature high-pressure hydraulic fracturing system and test method |
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Application publication date: 20120509 |