CN107101875A - The universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss - Google Patents
The universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss Download PDFInfo
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- CN107101875A CN107101875A CN201710450231.6A CN201710450231A CN107101875A CN 107101875 A CN107101875 A CN 107101875A CN 201710450231 A CN201710450231 A CN 201710450231A CN 107101875 A CN107101875 A CN 107101875A
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- Prior art keywords
- pressure
- calibration instrument
- high pressure
- confined pressure
- confined
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
The present invention provides a kind of universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss, belongs to rock strength field of measuring technique.The high pressure confined pressure calibration instrument nacelle of the high pressure confined pressure calibration instrument is provided with oil inlet, exhaust outlet and oil pressure gauge, there is the different hatchcover of internal diameter at nacelle two ends, hatchway cover is matched according to rock core size, it is the back of the body universal self sealss high-strength polyurethane rubber sleave of dual-cavity inside nacelle, hydraulic oil is filled between leather sheath and high pressure confined pressure calibration instrument nacelle, and experiment rock sample is placed in back of the body dual-cavity type polyurethane rubber sleave and is extruded.Whole system uses hydraulic oil self sealss principle, hatchway cover is matched according to rock core size, oil inlet is connected by high-pressure oil pipe with high-pressure hand pump, using rubber sleave, confined pressure 80MPa stable loading is realized, the confined pressure size in high pressure confined pressure calibration instrument is monitored in real time by compression system.The present invention can simulate deep rock mass crustal stress, and monitoring rock sample loads prerupture deformation, easy to operate, confined pressure steady.
Description
Technical field
The present invention relates to rock strength field of measuring technique, a kind of hollow inclusion geostress survey self sealss are particularly related to many
The universal high pressure confined pressure calibration instrument of bore.
Background technology
Geostress survey is the prerequisite for realizing Geotechnical Engineering excavation design and the scientification of decision-making.Confined pressure calibration is hollow
The indoor standardization experiment of inclusion geostress survey method, to determine to become parameter by the core that geostress survey indirect method is obtained
Number, and then derive stress intensity.Superficial part geostress survey is based on linear elastic theory, and confined pressure calibration determines rock constant deformation
Parameter.But enter deep, it is special that rock, rock mass show obvious nonlinear deformation in the case where stress level gradually increases
Levy.Therefore need to break through conventional confined pressure calibration (pressure is within 40MPa) limitation, according to measure field stress level, research and development are high
Press and core change parameter under core nonlinear deformation feature acquisition different pressures is released under confined pressure rating device research high-stress state
Number, improves Deep ground stress measurement accuracy and data and rationality.
At present both at home and abroad crustal stress confined pressure rating device model mainly have the model-A types of ES＆S companies, model-B types,
Model-C types.ES＆S Products have according to the different maximum pressure scopes of model in the world：0-30MPa and 0-40MPa, equipment
Maximum can provide 40MPa confined pressures, and (it is 0-30MPa, Type B number (diameter 70- that A models (diameter 110-150mm), which provide pressure limit,
It is 0-40MPa 110mm) to provide pressure limit, and it is 0-40MPa, http that c-type number (diameter 40-70mm), which provides pressure limit,://
www.esands.com/products/Geotech/Biaxial.html).Country's " 13 " key scientific and technological projects " deep
Ambient stress and geological hazard geodynamics " propose that China deep rock mass is defined on 2000 meters with shallow, and now crustal stress level has reached
(Ge Xiurun, 2011, " three-dimensional ground stress BWSRM new method of measuring and its well logging robot are in great work by 60MPa even 100MPa
Application in journey ").More obvious nonlinear deformation feature is presented in deep rock rock mass under the conditions of the high pressure level of deep.
Therefore, in order to obtain series of characteristics parameter of the rock mass from low pressure to high pressure, mechanical behavior of the rock mass from low pressure to high pressure is simulated,
Crustal stress level is pushed away, it is necessary to research and develop heavily stressed confined pressure rating device by the way that rock mass deformation parameter under high confining pressure is counter.
Because the pressure-bearing gum cover of existing confined pressure calibration (biaxial pressure system) equipment by sealing ring is fixed on pressure-bearing cylinder body
On, leather sheath deformation is controlled by cylinder body fixture and oil pressure, can be produced stress concentration in edge and be influenceed system integral pressure
Rise.In addition in-situ stresses release core external diameter because the difference of Rock Species, boring pressure, bit performance has larger change
Change, and under the conditions of fixed elongation, single equipment can not meet many bore core experiment demands.The dual-cavity that the present invention is used
Type self sealss high-strength polyurethane leather sheath, its retractility is up to 600%, and tensile strength coordinates different mouths up to 30MPa, pressure-bearing gum cover
Footpath cylinder body cover plate retractable deformation simultaneously controls seal performance to meet the confined pressure rate of multiple caliber core by machining accuracy
Fixed experiment, eliminates stress concentration, meets high stress requirement.The multiple diameter core such as 90mm, 100mm, 110mm is completed at present
50Mpa, 60Mpa, 80Mpa confined pressure testing experiment.The many bores of hollow inclusion geostress survey self sealss that the present invention is provided lead to
With type high pressure confined pressure calibration instrument, test at present shows that test simulation stress level can reach 80MPa.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of many bores of hollow inclusion geostress survey self sealss are universal
High pressure confined pressure calibration instrument.
The high pressure confined pressure calibration instrument includes high pressure confined pressure calibration instrument nacelle, hatchcover, rubber sleave and high-pressure hand pump；High pressure is enclosed
Pressure calibration instrument nacelle two ends, which are set on the hatchcover that limitation rubber sleave is extended out, hatchcover, the concentric circles equal with rubber sleave internal diameter
Hole, hydraulic oil is filled between rubber sleave and high pressure confined pressure calibration instrument nacelle, and experiment rock sample, which is placed in rubber sleave, to be extruded；
Rubber sleave is arranged in high pressure confined pressure calibration instrument nacelle, the height and the height phase of rubber sleave of high pressure confined pressure calibration instrument nacelle
Together；Oil inlet and exhaust outlet are set in high pressure confined pressure calibration instrument nacelle, and oil inlet is connected by high-pressure oil pipe with high-pressure hand pump, arranged
Gas port is used to discharge the air between high pressure confined pressure calibration instrument nacelle and rubber sleave, and exhaust outlet and oil pressure gauge Integral design.
Wherein, hatchcover is the general matching type hatchcover of multiple aperture；Rubber sleave is the back of the body universal self sealss high intensity of dual-cavity
Polyurethane rubber leather sheath, rubber sleave parameter is as follows：65 ± 3HA of hardness, tensile strength >=30MPA, elongation at break >=
600%, tearing strength >=50KN/m, setafter break≤25%, Akron abrasion≤0.1, heat oxygen aging resistance (70 DEG C ×
168h, tensile strength rate of descent)≤15%, flexible resistance can 300,000 no crackings.
Oil pressure can reach 700MPa in high pressure confined pressure calibration instrument nacelle, and the high pressure confined pressure calibration instrument nacelle and hatchcover are used
12.9 grades of intensity hexagon socket head cap screws connection of 8 26.9mm bores.Hexagon socket head cap screw (5) tensile strength is 1220MPa.
The high-pressure oil pipe used at high pressure confined pressure calibration instrument oil inlet is 227957A type alloy oil pipe, high-pressure oil pipe intensity
≤ 250MPa, high-pressure oil pipe metal bore is 20mm.
Rubber sleave external diameter size is less than 1mm with the high pressure confined pressure calibration instrument nacelle difference in internal diameters.
High pressure confined pressure calibration instrument is not provided with metal washer, the completely service behaviour by the rubber sleave and oil pressure pressurization,
Make rubber sleave and nacelle is closed agrees with, with the growth of pressure, rubber sleave only has the increase of inner ring size, and cabin is close in outer ring
Body, is sealed by oil pressure pressure to the high pressure confined pressure calibration instrument, so as to realize self sealss.
Whole system uses hydraulic oil self sealss principle, and hatchway cover is matched according to rock core size, and oil inlet passes through hydraulic oil
Pipe is connected with high-pressure hand pump, using universal self sealss high-strength polyurethane rubber sleave, realizes that confined pressure 80MPa stabilization adds
Carry, monitor the confined pressure size in high pressure confined pressure calibration instrument in real time by compression system.The hollow inclusion geostress survey of invention is certainly
More than the radial direction 80MPa confined pressure of stabilization can be applied within a short period of time by sealing the universal high pressure confined pressure calibration instrument of many bores
Value, can simulate deep rock mass crustal stress, and monitoring rock sample loads prerupture deformation, and system has easy to operate, and confined pressure is steady
The advantages of determining.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
The universal self sealss high intensity of back of the body dual-cavity that rock sample is placed in the high pressure confined pressure calibration instrument by the present invention is gathered
In urethane rubber sleave, hydraulic oil is full of between the high pressure confined pressure calibration instrument nacelle and leather sheath, using the mobility of hydraulic oil,
Make pressure energy stepless action on rock sample, apply the confined pressure pressure of radial direction to rock sample, operate easy to operate, confined pressure steady etc.
Advantage.
Brief description of the drawings
Fig. 1 shows for the universal high pressure confined pressure calibration instrument structure of many bores of hollow inclusion geostress survey self sealss of the present invention
It is intended to；
Fig. 2 is the universal high pressure confined pressure calibration instrument polyurethane rubber of many bores of hollow inclusion geostress survey self sealss of the present invention
Rubber sleeve design drawing；
Fig. 3 is the universal high pressure confined pressure calibration instrument nacelle design of many bores of hollow inclusion geostress survey self sealss of the present invention
Figure；
Fig. 4 is the universal high pressure confined pressure calibration instrument hatchcover design of many bores of hollow inclusion geostress survey self sealss of the present invention
Figure.
Wherein：1- high pressure confined pressure calibration instrument nacelles；2- hatchcovers；3- high-pressure oil pipes；4- oil pressure gauges；5- hexagon socket head cap screws；6-
Exhaust outlet；7- rubber sleaves；8- high-pressure hand pumps.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss.
As shown in figure 1, the high pressure confined pressure calibration instrument includes high pressure confined pressure calibration instrument nacelle 1, hatchcover 2, rubber sleave 7 and height
Press hand pump 8；The two ends of high pressure confined pressure calibration instrument nacelle 1, which are set on the hatchcover 2 that limitation rubber sleave 7 is extended out, hatchcover 2, to be had and rubber peel
Cover the equal concentric circle holes of 7 internal diameters；Rubber sleave 7 is arranged in high pressure confined pressure calibration instrument nacelle 1, high pressure confined pressure calibration instrument nacelle
1 height is identical with the height of rubber sleave 7；Oil inlet and exhaust outlet 6, oil inlet are set in high pressure confined pressure calibration instrument nacelle 1
Be connected by high-pressure oil pipe 3 with high-pressure hand pump 8, exhaust outlet 6 be used to discharging high pressure confined pressure calibration instrument nacelle 1 and rubber sleave 7 it
Between air, and exhaust outlet 6 and the Integral design of oil pressure gauge 4.With interior hexagonal spiral shell between high pressure confined pressure calibration instrument nacelle 1 and hatchcover 2
Bolt 5 is connected, to ensure that nacelle and hatchcover are completely embedded, and is compacted rubber sleave, it is ensured that sealing.The overall diameter of rubber sleave 7 and cabin
Internal footpath is identical, and internal diameter is identical with hatchcover internal diameter, it is ensured that nacelle ensures self sealss state under the conditions of zero-pressure, and rock sample is put into rubber
It is compressed in leather sheath.
Rubber sleave 7, high pressure confined pressure calibration instrument nacelle 1 and the design drawing of hatchcover 2 difference are as shown in Figure 2, Figure 3 and Figure 4.
Rubber sleave 7 is the back of the body universal self sealss high-strength polyurethane rubber sleave of dual-cavity, and rubber sleave parameter is as follows：
65 ± 3HA of hardness, tensile strength >=30MPA, elongation at break >=600%, tearing strength >=50KN/m, setafter break≤
25%, Akron abrasion≤0.1, heat oxygen aging resistance (70 DEG C × 168h, tensile strength rate of descent)≤15%, flexible resistance energy 30
Ten thousand no crackings.
The material therefor of high pressure confined pressure calibration instrument nacelle 1 (is referred to as No. 45 steel after quenched in JIS：S45C,ASTM
In be referred to as 1045,080M46, DIN is referred to as：C45), No. 45 steel after modifier treatment have good comprehensive mechanical performance, and it resists
Tensile strength is not less than 700MPa.
Oil pressure is no more than 700MPa in high pressure confined pressure calibration instrument nacelle 1, and high pressure confined pressure calibration instrument nacelle 1 and hatchcover 2 use 8
12.9 grades of intensity hexagon socket head cap screws 5 of individual 26.9mm bores are connected.
The high-pressure oil pipe 3 used at high pressure confined pressure calibration instrument oil inlet is 227957A type alloy oil pipe, high-pressure oil pipe the last 3
Degree≤250MPa, the metal bore of high-pressure oil pipe 3 is 20mm.
The external diameter size of rubber sleave 7 is less than 1mm with the difference in internal diameters of high pressure confined pressure calibration instrument nacelle 1.High pressure confined pressure calibration
Instrument is not provided with metal washer.
Concrete operating principle (operating procedure) is:
1st, the rock sample for posting foil gauge is put into polyurethane rubber leather sheath 7 as shown in Figure 1；
2nd, then, whole rubber sleave 7 is put into high pressure confined pressure calibration instrument nacelle 1；
3rd, hatchcover 2 is fixed in high pressure confined pressure calibration instrument nacelle 1 by hexagon socket head cap screw 5, from side extraction wire；
4th, the connection oil inlet of high-pressure oil pipe 3 and high-pressure hand pump 8, the bolt of exhaust outlet 6 unclamps, until nacelle and rubber sleave 7
Between be full of hydraulic oil after, exhaust outlet 6 is sealed；
5th, it will be put on the rigid compression Strength testing machine of rock and fix in high pressure confined pressure calibration instrument, by wire and deformeter phase
Even；
6th, high-pressure hand pump 8 adds to required pressure；
7th, exhaust outlet 6 is opened in off-test, and hydraulic oil in nacelle is back in high-pressure hand pump 8.
The present invention uses the universal high pressure confined pressure of the self sealss many bores of principle design hollow inclusion geostress survey self sealss
Calibration instrument, hydraulic oil is entered in high pressure confined pressure calibration instrument by the oil inlet being connected with high-pressure hand pump, and rubber sleave is to its interior rock
The heart applies radial direction confined pressure, and oil pressure is stable；The cylindrical rock sample diameter used is identical with leather sheath internal diameter；High-pressure oil pipe and nacelle oil-feed
Filter screen is installed, when preventing that leather sheath from rupturing oil return, chip does not flow into high-pressure oil pipe with hydraulic oil and resulted in blockage at mouthful.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss, it is characterised in that：Including
High pressure confined pressure calibration instrument nacelle (1), hatchcover (2), rubber sleave (7) and high-pressure hand pump (8)；High pressure confined pressure calibration instrument nacelle (1)
Two ends, which are set on the hatchcover (2) that limitation rubber sleave (7) is extended out, hatchcover (2), the concentric circles equal with rubber sleave (7) internal diameter
Hole；Rubber sleave (7) is arranged in high pressure confined pressure calibration instrument nacelle (1), the height and rubber of high pressure confined pressure calibration instrument nacelle (1)
The height of leather sheath (7) is identical；Oil inlet and exhaust outlet (6) are set in high pressure confined pressure calibration instrument nacelle (1), and oil inlet passes through high pressure
Oil pipe (3) is connected with high-pressure hand pump (8), and exhaust outlet (6) is used to discharge high pressure confined pressure calibration instrument nacelle (1) and rubber sleave (7)
Between air, and exhaust outlet (6) and oil pressure gauge (4) Integral design.
2. the universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss according to claim 1,
It is characterized in that：The hatchcover (2) is the general matching type hatchcover of multiple aperture；The rubber sleave (7) is universal for back of the body dual-cavity
Self sealss high-strength polyurethane rubber sleave, rubber sleave (7) parameter is as follows：65 ± 3HA of hardness, tensile strength >=30MPA, is pulled
Disconnected elongation >=600%, tearing strength >=50KN/m, setafter break≤25%, Akron abrasion≤0.1, heat-resisting oxygen is old
Change≤15%, flexible resistance can 300,000 no crackings.
3. the universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss according to claim 1,
It is characterized in that：The interior oil pressure of the high pressure confined pressure calibration instrument nacelle (1) is no more than 700MPa, the high pressure confined pressure calibration instrument nacelle
(1) connected with hatchcover (2) using 12.9 grades of intensity hexagon socket head cap screws (5) of 8 26.9mm bores.
4. the universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss according to claim 3,
It is characterized in that：Hexagon socket head cap screw (5) tensile strength is 1220MPa.
5. the universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss according to claim 1,
It is characterized in that：The high-pressure oil pipe (3) used at the high pressure confined pressure calibration instrument oil inlet is high for 227957A type alloy oil pipes
Pressuring oil pipe (3) intensity≤250MPa, high-pressure oil pipe (3) metal bore is 20mm.
6. the universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss according to claim 1,
It is characterized in that：Rubber sleave (7) the external diameter size is less than 1mm with high pressure confined pressure calibration instrument nacelle (1) difference in internal diameters.
7. the universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss according to claim 1,
It is characterized in that：The high pressure confined pressure calibration instrument is not provided with metal washer.
8. the universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss according to claim 1,
It is characterized in that：The high pressure confined pressure calibration instrument, which can be stablized, is pressurized to more than 80MPa confined pressures.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710450231.6A CN107101875A (en) | 2017-06-15 | 2017-06-15 | The universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710450231.6A CN107101875A (en) | 2017-06-15 | 2017-06-15 | The universal high pressure confined pressure calibration instrument of many bores of hollow inclusion geostress survey self sealss |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966371A (en) * | 2017-12-20 | 2018-04-27 | 北京科技大学 | A kind of portable self sealss rock SHPB experiments confined pressure pressue device |
| CN110082191A (en) * | 2019-05-29 | 2019-08-02 | 海南大学 | A kind of model test soil case that novel confining pressure is controllable |
| CN110095357A (en) * | 2019-04-12 | 2019-08-06 | 南京航空航天大学 | The loading device and method of dynamic loading experiment are stretched for self-sealing falling-off connector |
| CN110196191A (en) * | 2019-05-28 | 2019-09-03 | 河南理工大学 | The multiaxial experiment device of material damage feature under a kind of analog complex stress condition |
| CN111811923A (en) * | 2020-06-28 | 2020-10-23 | 中铁第一勘察设计院集团有限公司 | System and method for testing flexibility ratio of hysteretic elastic strain recovery method for ground stress measurement |
| CN113008686A (en) * | 2021-03-02 | 2021-06-22 | 中国石油大学(北京) | Hard and brittle shale crack opening simulation device |
| CN115143928A (en) * | 2022-09-05 | 2022-10-04 | 云南省交通投资建设集团有限公司 | Strain probe calibration system and method for simulating high-temperature and high-pressure environment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966371A (en) * | 2017-12-20 | 2018-04-27 | 北京科技大学 | A kind of portable self sealss rock SHPB experiments confined pressure pressue device |
| CN110095357A (en) * | 2019-04-12 | 2019-08-06 | 南京航空航天大学 | The loading device and method of dynamic loading experiment are stretched for self-sealing falling-off connector |
| CN110196191A (en) * | 2019-05-28 | 2019-09-03 | 河南理工大学 | The multiaxial experiment device of material damage feature under a kind of analog complex stress condition |
| CN110082191A (en) * | 2019-05-29 | 2019-08-02 | 海南大学 | A kind of model test soil case that novel confining pressure is controllable |
| CN111811923A (en) * | 2020-06-28 | 2020-10-23 | 中铁第一勘察设计院集团有限公司 | System and method for testing flexibility ratio of hysteretic elastic strain recovery method for ground stress measurement |
| CN113008686A (en) * | 2021-03-02 | 2021-06-22 | 中国石油大学(北京) | Hard and brittle shale crack opening simulation device |
| CN115143928A (en) * | 2022-09-05 | 2022-10-04 | 云南省交通投资建设集团有限公司 | Strain probe calibration system and method for simulating high-temperature and high-pressure environment |
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