CN106595468B - Built-in rock sample inner hole radial direction deformation test device - Google Patents
Built-in rock sample inner hole radial direction deformation test device Download PDFInfo
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- CN106595468B CN106595468B CN201611176095.8A CN201611176095A CN106595468B CN 106595468 B CN106595468 B CN 106595468B CN 201611176095 A CN201611176095 A CN 201611176095A CN 106595468 B CN106595468 B CN 106595468B
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- inner hole
- rock sample
- electrode plate
- sample inner
- disk
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/22—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in capacitance
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a kind of built-in rock sample inner hole radial direction deformation test devices, built-in rock sample inner hole radial direction deformation test device, the sensor including the cyclic annular extensometer that can be deformed in rock sample inner hole to be measured and with rock sample inner hole radial deformation to be measured can be placed in, for making the cyclic annular extensometer be attached at the adhering device of rock sample inner hole wall to be measured and deform for incuding cyclic annular extensometer；The ring-type, which is extended, is calculated as the annulus equipped with opening, and annulus open at one end is provided with slide bar, and the slide bar can be slided along its own axially opposing opening other end single-degree-of-freedom.Built-in rock sample inner hole radial direction deformation test device of the invention, can be placed in rock sample inner hole to be measured, and is provided with adhering device and extensometer and rock sample inner hole inner wall to be measured are in close contact, and measurement rock sample inner hole radial deformation is convenient, and measurement result is accurate.
Description
Technical field
The present invention relates to a kind of rock sample deformation test device, in particular to a kind of built-in rock sample inner hole radial direction deformation test
Device.
Background technique
When carrying out there are the rock mechanics of inner hole to test, need to test the deformation of inner hole, due to rock sample
Hole size is small, and closed state is in when inner hole is tested, is not easy directly to monitor its deformation, and extensometer is not easy to be fixed on rock
In sample internal orifice dimension, measurement inner hole radial deformation is very inconvenient and measurement result is not accurate.
Therefore, it is necessary to improve to extensometer in the prior art, detection rock sample inner hole radial deformation is made it easier to,
And measurement result is accurate.
Summary of the invention
In view of this, making it the purpose of the present invention is to provide a kind of built-in rock sample inner hole radial direction deformation test device
It is easy to detect rock sample inner hole radial deformation, and measurement result is accurate.
Built-in rock sample inner hole radial direction deformation test device of the invention, including can be placed in rock sample inner hole to be measured and can
The cyclic annular extensometer that is deformed with rock sample inner hole radial deformation to be measured, for being attached at the cyclic annular extensometer in rock sample to be measured
The adhering device of hole wall and the sensor deformed for incuding cyclic annular extensometer；
The ring-type, which is extended, is calculated as the annulus equipped with opening, and annulus open at one end is provided with slide bar, and the slide bar can be along it
Itself axially opposing opening other end single-degree-of-freedom sliding.
Further, the adhering device includes main framing, secondary skeleton, the first disk and the second disk；First disk,
The center of circle of second disk and the cyclic annular extensometer three are conllinear, and the distance of the second disk to cyclic annular extensometer is less than the first disk
To the distance of cyclic annular extensometer, extension spring is provided between the first disk and the second disk；One end of the main framing is hinged
In the cyclic annular extensometer, the other end is articulated with the first disk；One end of the secondary skeleton is articulated with the second disk, other end hinge
It is connected to main framing.
Further, second disk is provided with support rod backwards to the first disk on one side.
Further, the capacitor of the sensor capacitance formula sensor, the capacitance type sensor can be with the sliding bar
And change.
Further, the capacitance type sensor includes being set to the electrode plate of the annulus opening without slide bar end, the electricity
Pole plate includes first electrode plate and second electrode plate, and the slide bar protrudes between first electrode plate and second electrode plate and can be along it
Itself is axial in the sliding of electrode plate surface single-degree-of-freedom.
Further, the diameter of axle of the slide bar is less than the distance between first electrode plate and second electrode plate, and slide bar is close to electricity
The end diameter of axle of pole plate increases to can contact the slide plate to be formed and can be slided along electrode plate surface single-degree-of-freedom with electrode plate.
It further, further include for preventing the slide plate from skidding off the limit between the first electrode plate and second electrode plate
Device.
Further, the limiting device includes the spring being set between the slide plate and annulus open end.
Further, the limiting device further includes the limit being set between the first electrode plate and second electrode plate
Plate.
Beneficial effects of the present invention: built-in rock sample inner hole radial direction deformation test device of the invention can be placed in be measured
It in rock sample inner hole, and is provided with adhering device and extensometer and rock sample inner hole inner wall to be measured is in close contact, measure in rock sample
Hole radial deformation is convenient, and measurement result is accurate.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the enlarged structure schematic diagram in Fig. 2 near capacitance type sensor.
Specific embodiment
Fig. 1 is the structural diagram of the present invention, and Fig. 2 is the top view of Fig. 1, and Fig. 3 is in Fig. 2 near capacitance type sensor
Enlarged structure schematic diagram, as shown in the figure: built-in rock sample inner hole radial direction deformation test device of the invention, including can be placed in
Survey the cyclic annular extensometer 2 that can be deformed in rock sample inner hole and with rock sample inner hole radial deformation to be measured, for making the ring-type extend
The sensor 3 that meter 2 is attached at the adhering device of rock sample inner hole wall to be measured and deforms for incuding cyclic annular extensometer 2；Ring-type is extended
Meter 2 is the annulus equipped with opening, and annulus open at one end is provided with slide bar 21, and slide bar 21 can be another along its own axially opposing opening
Single-degree-of-freedom sliding is held, causes annulus to increase or reduce by sliding bar to realize cyclic annular extensometer 2 with rock sample inner hole to be measured
Radial deformation and deform；Sensor 3 can choose capacitance type sensor, resistance sensor or optical sensor, sense certainly
Device can connect connect the peripheral equipments such as central processing unit and display convenient for observation calibrate to deformation numerical value；Test rock sample inner hole
Cyclic annular extensometer is put into rock sample internal orifice dimension to be measured when radial deformation, is attached at cyclic annular extensometer by adhering device to be measured
Rock sample inner hole hole wall, rock sample inner hole radial deformation to be measured cause cyclic annular extensometer to become larger or become smaller, and cyclic annular extensometer becomes larger or becomes
It is small to lead to sliding bar, then ring sliding bar is measured by sensor and is scaled rock sample inner hole radial deformation；The present invention can place
In in rock sample inner hole to be measured, measurement rock sample inner hole radial deformation is convenient, and measurement result is accurate.
In the present embodiment, the adhering device includes main framing 1, secondary skeleton 6, the first disk 4 and the second disk 7；It is described
First disk 4, the second disk 7 are conllinear with the center of circle of cyclic annular 2 three of extensometer, the second disk 7 arrive cyclic annular extensometer away from
It is arrived with a distance from cyclic annular extensometer from less than the first disk 4, is provided with extension spring 5 between the first disk 4 and the second disk 7；Institute
The one end for stating main framing 1 is articulated with the cyclic annular extensometer 2, and the other end is articulated with the first disk 4；One end of the secondary skeleton 6
It is articulated with the second disk 7, the other end is articulated with main framing 1；Under the pulling force effect of extension spring, the first disk and the second disk
Have the tendency that close to make time skeleton that main framing be pushed to form the trend expanded outwardly to guarantee that cyclic annular extensometer pastes always
Rock sample inner hole wall to be measured is invested, stress can be passed to main framing by ring-type extensometer when rock sample inner hole hole wall deformation to be measured reduces
And secondary skeleton causes distance increase between the first disk and the second disk to increase the level of stretch of extension spring to be buffered,
And due to the transmitting by main framing and time skeleton, when rock sample inner hole to be measured radially becomes smaller, adhering device extends to ring-type
The resistance for counting deformation is small；This structure guarantees that no matter radial displacement becomes larger or becomes smaller in experimentation, can be such that cyclic annular extensometer pastes
In hole wall, correct deformation is measured.
In the present embodiment, second disk 7 is provided with support rod 8 backwards to the first disk 4 on one side, and support rod 8 can be with
It is set as the structure of adjustable in length, specific structure uses the prior art, no longer repeated herein；Support rod 8 can be with
Adhering device is fixed and supported, keeps its structure more stable, pulls support rod 8 to increase 5 level of stretch of extension spring, to make
Cyclic annular extensometer 2 becomes smaller, convenient for cyclic annular extensometer 2 is put into rock sample inner hole to be measured or is taken out from rock sample inner hole to be measured.
In the present embodiment, 3 capacitance type sensor of sensor, capacitor can change with sliding bar；It can be in cunning
A first electrode plate axially vertical with slide bar is arranged in the front of motor of bar, cyclic annular extensometer opening without the setting of slide bar end and
The parallel second electrode plate (not indicating in figure) of first electrode plate, causes the variation of distance between electrode plate to be drawn by sliding bar
Capacitance variations are played, the relationship between capacitance variations and cyclic annular extensometer deformation, which is carried out calibration, can measure as a result, can also set
Other structures for causing capacitive sensor electrode plate positive area or relative distance to change with sliding bar are set to, it can be real
The existing purpose of the present invention；The minimum energy that capacitance type sensor high impedance, low power feature make it need to input, can sense
The micro-strain of rock sample inner hole radial direction, sensitivity are good；Fever itself is small for capacitance type sensor relative resistance formula sensor, because
And temperature stability is good；Due to the electrostatic attraction very little between electrode plate, moving part does that can to obtain very little very thin, therefore it is intrinsic
Frequency is very high, and dynamic response time is short, can be advantageously implemented in several megahertzs of operation at frequencies to rock sample inner hole radial direction deformation
Dynamic measures.
In the present embodiment, the capacitance type sensor includes being set to the electrode plate of the annulus opening without slide bar end, institute
Stating electrode plate includes first electrode plate 31 and the second electrode plate 32 being parallel to each other with first electrode plate, and the slide bar 21 protrudes into
It can slide between one electrode plate 31 and second electrode plate 32 and along its own axial direction in electrode plate surface single-degree-of-freedom, certain slide bar
21 need to be made of insulation exhausted magnetic material, and air can be directlyed adopt between electrode plate as medium；It can when slide bar 21 slides
To cause the variation of positive area between first electrode plate 31 and second electrode plate 32 so as to cause the variation of capacitor, according to formula
Capacitor C=ε S/d (dielectric constant of ε medium between electrode plate, S are pole plate positive area, distance of the d between electrode plate), works as ε
With d be fixed value when, between the variation of capacitor C and the variation of positive area S be linear relationship, convenient for calibration.
In the present embodiment, the diameter of axle of the slide bar 21 is less than the distance between first electrode plate 31 and second electrode plate 32,
Slide bar 21 is increased to close to the end diameter of axle of electrode plate can contact to be formed and can be slided along electrode plate surface single-degree-of-freedom with electrode plate
Slide plate；Reduce the friction area between slide bar and electrode plate to reduce friction error caused by capacitor.
In the present embodiment, further include for prevent the slide plate skid off the first electrode plate 31 and second electrode plate 32 it
Between limiting device；When the increase of cyclic annular extensometer causes slide bar to skid off between first electrode plate and second electrode plate, capacitor is not
Change again with the sliding of slide bar, has exceeded range of the invention.
In the present embodiment, the limiting device includes the spring being set between the slide plate and annulus open end, can be with
In slide plate and without compressed spring 34 is arranged between slide bar end, in slide plate and there can also be setting extension spring (figure between slide bar end
In do not indicate)；The structure not only can anti-limited slip plate skid off between the first electrode plate and second electrode plate, can also assist
Play the role of the preload that cyclic annular extensometer is attached to rock sample inner hole hole wall to be measured.
In the present embodiment, the limiting device further includes being set between the first electrode plate 31 and second electrode plate 32
Limit plate 33；Prevent cyclic annular extensometer from deforming excessive and spring is caused to be more than elastic deformation range.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (7)
1. a kind of built-in rock sample inner hole radial direction deformation test device, it is characterised in that: including rock sample inner hole to be measured can be placed in
Cyclic annular extensometer, to be measured for being attached at the cyclic annular extensometer that is interior and being deformed with rock sample inner hole radial deformation to be measured
The adhering device of rock sample inner hole wall and the sensor deformed for incuding cyclic annular extensometer；
The ring-type, which is extended, is calculated as the annulus equipped with opening, and annulus open at one end is provided with slide bar, and the slide bar can be along its own
Axially opposing opening other end single-degree-of-freedom sliding；
The adhering device includes main framing, secondary skeleton, the first disk and the second disk；First disk, the second disk and
The center of circle of the ring-type extensometer three is conllinear, and the distance of the second disk to cyclic annular extensometer is extended less than the first disk to ring-type
The distance of meter is provided with extension spring between the first disk and the second disk；One end of the main framing is articulated with the ring-type
Extensometer, the other end are articulated with the first disk；One end of the secondary skeleton is articulated with the second disk, and the other end is articulated with main bone
Frame；
The sensor is capacitance type sensor, and the capacitor of the capacitance type sensor can change with the sliding bar.
2. built-in rock sample inner hole radial direction deformation test device according to claim 1, it is characterised in that: second circle
Disk is provided with support rod backwards to the first disk on one side.
3. built-in rock sample inner hole radial direction deformation test device according to claim 1, it is characterised in that: the condenser type
Sensor includes being set to the electrode plate of the annulus opening without slide bar end, and the electrode plate includes first electrode plate and the second electricity
Pole plate, the slide bar protrude between first electrode plate and second electrode plate and can be free in electrode plate surface list along its own axial direction
Degree sliding.
4. built-in rock sample inner hole radial direction deformation test device according to claim 3, it is characterised in that: the slide bar
The diameter of axle is less than the distance between first electrode plate and second electrode plate, and slide bar is increased to close to the end diameter of axle of electrode plate can be with electricity
Pole plate contacts the slide plate to be formed and can be slided along electrode plate surface single-degree-of-freedom.
5. built-in rock sample inner hole radial direction deformation test device according to claim 4, it is characterised in that: further include being used for
Prevent the slide plate from skidding off the limiting device between the first electrode plate and second electrode plate.
6. built-in rock sample inner hole radial direction deformation test device according to claim 5, it is characterised in that: the limit dress
Set the spring including being set between the slide plate and annulus open end.
7. built-in rock sample inner hole radial direction deformation test device according to claim 6, it is characterised in that: the limit dress
Setting further includes the limit plate being set between the first electrode plate and second electrode plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611176095.8A CN106595468B (en) | 2016-12-19 | 2016-12-19 | Built-in rock sample inner hole radial direction deformation test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611176095.8A CN106595468B (en) | 2016-12-19 | 2016-12-19 | Built-in rock sample inner hole radial direction deformation test device |
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| Publication Number | Publication Date |
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| CN106595468A CN106595468A (en) | 2017-04-26 |
| CN106595468B true CN106595468B (en) | 2019-08-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109029235B (en) * | 2018-06-26 | 2023-06-30 | 山东科技大学 | Mechanical expansion type hole wall deformation sensor for drilling and monitoring and using method |
| CN109855525B (en) * | 2018-12-12 | 2020-10-27 | 西安近代化学研究所 | Dielectric elastomer-based effect target deformation measuring device and measuring method |
| CN112554871B (en) * | 2020-11-26 | 2023-05-12 | 中国科学院武汉岩土力学研究所 | Drilling aperture measuring device and measuring method thereof |
| CN112556560B (en) * | 2021-02-22 | 2021-05-28 | 湖南联智科技股份有限公司 | Device and method for monitoring relative slippage of deep soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2886403B1 (en) * | 2005-05-24 | 2008-01-04 | Univ Lille Sciences Tech | COLLAR FOR MEASURING THE SIDE DEFORMATION OF A TEST DURING COMPRESSION TESTS, IN PARTICULAR UNIAXIAL OR TRIAXIAL TESTS |
| CN100516766C (en) * | 2007-08-09 | 2009-07-22 | 中国科学院武汉岩土力学研究所 | Mechanical type multiple-point displacement gage |
| CN101451812B (en) * | 2007-12-07 | 2012-03-07 | 中国石化集团胜利石油管理局钻井工艺研究院 | Detection device for detecting deformation of oil gas delivery conduit |
| CN103487327B (en) * | 2013-08-30 | 2015-09-16 | 上海华龙测试仪器股份有限公司 | A kind of Roller-chain extensometer |
| CN203798306U (en) * | 2014-05-06 | 2014-08-27 | 中建三局集团有限公司 | Adjustable pipeline deformation rate detection apparatus |
| CN205102773U (en) * | 2015-11-24 | 2016-03-23 | 重庆科技学院 | Simulation hole room is with inner wall deformation test device |
| CN205403750U (en) * | 2016-03-29 | 2016-07-27 | 广东技术师范学院 | Internal diameter of pipeline reducing detection device |
| CN206248027U (en) * | 2016-12-19 | 2017-06-13 | 重庆科技学院 | Measure the device of rock endoporus radial deformation |
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