CN106595468A - Apparatus for testing radial deformation of inner pore of built-in rock sample - Google Patents
Apparatus for testing radial deformation of inner pore of built-in rock sample Download PDFInfo
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- CN106595468A CN106595468A CN201611176095.8A CN201611176095A CN106595468A CN 106595468 A CN106595468 A CN 106595468A CN 201611176095 A CN201611176095 A CN 201611176095A CN 106595468 A CN106595468 A CN 106595468A
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- rock sample
- disk
- ring
- electrode plate
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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 an apparatus for testing the radial deformation of an inner pore of a built-in rock sample. The apparatus includes a ring-shaped extensometer which may be placed inside the inner pore of a to-be-tested rock sample and may deform along with the radial deformation of the inner pore of the to-be-tested rock sample, an attaching apparatus which is intended for attaching the ring-shaped extensometer to the wall of the inner pore of the to-be-tested rock sample and a sensor which is intended for sensing the deformation of the ring-shaped extensometer. The ring-shaped extensometer is a circle ring having an opening. The opening of the circle has one end provided with a sliding pole which may freely slide relative to the other end of the opening in the radial direction of the sliding pole. According to the invention, the apparatus may be placed inside the inner pore of the to-be-tested rock sample, and is provided with the attaching apparatus, such that the extensometer is in tight contact with the internal wall of the inner pore of the to-be-tested rock sample. Therefore, the apparatus makes it easy to measure radial deformation of the inner pore of the rock sample and has precise measurement.
Description
Technical field
The present invention relates to a kind of rock sample deformation test device, more particularly to a kind of built-in rock sample endoporus radial direction deformation test
Device.
Background technology
When the rock mechanics for carrying out having endoporus are tested, need to test the deformation of endoporus, due to rock sample
Hole size is little, and closed state is in when endoporus is tested, and is difficult directly to monitor its deformation, and extensometer is not easy to be fixed on rock
In sample internal orifice dimension, measurement endoporus radial deformation is very inconvenient and measurement result is not accurate.
Therefore, it is necessary to be improved to extensometer of the prior art so as to be easy to detect rock sample endoporus radial deformation,
And measurement result is accurate.
The content of the invention
In view of this, it is an object of the invention to provide a kind of built-in rock sample endoporus radial direction deformation test device so as to
It is easy to detect rock sample endoporus radial deformation, and measurement result is accurate.
The built-in rock sample endoporus radial direction deformation test device of the present invention, including can be positioned in rock sample endoporus to be measured and can
The ring-type extensometer that deforms with rock sample endoporus radial deformation to be measured, for making the ring-type extensometer be attached in rock sample to be measured
The adhering device of hole wall and the sensor for sensing the deformation of ring-type extensometer；
The ring-type is extended and is calculated as the annulus for being provided 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 is slided.
Further, the adhering device includes main framing, secondary skeleton, the first disk and the second disk；First disk,
The center of circle of the second disk and the ring-type extensometer three is conllinear, and the distance of the second disk to ring-type extensometer is less than the first disk
To the distance of ring-type extensometer, between the first disk and the second disk extension spring is provided with；One end of the main framing is hinged
In the ring-type extensometer, the other end is articulated with the first disk；One end of described skeleton is articulated with the second disk, other end hinge
It is connected to main framing.
Further, the one side of second disk dorsad the first disk is provided with support bar.
Further, the sensor capacitance formula sensor, the electric capacity of the capacitance type sensor can be with the sliding bar
And change.
Further, the capacitance type sensor includes being arranged at the battery lead 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 stretches between first electrode plate and second electrode plate and can be along it
Itself axially slides in 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 near electricity
The end diameter of axle of pole plate is increased to can be contacted to form the slide plate that can be slided along electrode plate surface single-degree-of-freedom with battery lead plate.
Further, also include spacing between the first electrode plate and second electrode plate for preventing the slide plate from skidding off
Device.
Further, the stopping means include the spring being arranged between the slide plate and annulus opening.
Further, the stopping means are also spacing between the first electrode plate and second electrode plate including being arranged at
Plate.
Beneficial effects of the present invention：The built-in rock sample endoporus radial direction deformation test device of the present invention, can be positioned over to be measured
In rock sample endoporus, and adhering device is provided with so that extensometer is in close contact with rock sample endoporus inwall to be measured, in measurement rock sample
Hole radial deformation is convenient, and measurement result is accurate.
Description of the drawings
With reference to the accompanying drawings and examples the invention will be further described：
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the mplifying structure schematic diagram in Fig. 2 near capacitance type sensor.
Specific embodiment
Fig. 1 is the structural representation of the present invention, Fig. 2 for Fig. 1 top view, Fig. 3 is in Fig. 2 near capacitance type sensor
Mplifying structure schematic diagram, as shown in the figure：The built-in rock sample endoporus radial direction deformation test device of the present invention, treats including being positioned over
The ring-type extensometer 2 surveying in rock sample endoporus and can deform with rock sample endoporus radial deformation to be measured, for making the ring-type extend
Meter 2 is attached at the adhering device of rock sample inner hole wall to be measured and the sensor 3 for sensing the deformation of ring-type extensometer 2；Ring-type is extended
Meter 2 is the annulus for being provided with opening, and annulus open at one end is provided with slide bar 2-1, and slide bar 2-1 can be another along its own axially opposing opening
One end single-degree-of-freedom is slided, and causes annulus to increase or reduce to realize ring-type extensometer 2 with rock sample to be measured by sliding bar
Hole radial deformation and deform；Sensor 3 can select capacitance type sensor, resistance sensor or optical pickocff, pass certainly
Sensor can connect connect the ancillary equipment such as central processing unit and display be easy to observation calibrate to deformation numerical value；In test rock sample
Aperture is put into ring-type extensometer in rock sample internal orifice dimension to be measured to during deformation, is attached at ring-type extensometer by adhering device and treats
Survey rock sample endoporus hole wall, rock sample endoporus radial deformation to be measured causes ring-type extensometer to become big or diminish, ring-type extensometer become it is big or
Diminishing causes sliding bar, then measures ring sliding bar by sensor and be scaled rock sample endoporus radial deformation；The present invention can put
It is placed in rock sample endoporus to be measured, measurement rock sample endoporus 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
The center of circle of the first disk 4, the second disk 7 and the three of ring-type extensometer 2 is conllinear, the second disk 7 to ring-type extensometer away from
To with a distance from ring-type extensometer, between the first disk 4 and the second disk 7 extension spring 5 is provided with from less than the first disk 4；Institute
The one end for stating main framing 1 is articulated with the ring-type extensometer 2, and the other end is articulated with the first disk 4；One end of described skeleton 6
The second disk 7 is articulated with, the other end is articulated with main framing 1；Under the pulling force effect of extension spring, the first disk and the second disk
There is close trend so that secondary skeleton promotes the trend that main framing formation is expanded outwardly to paste all the time so as to ensure ring-type extensometer
Rock sample inner hole wall to be measured is invested, stress can be passed to main framing by ring-type extensometer when rock sample endoporus hole wall deformation to be measured reduces
And secondary skeleton causes distance increase between the first disk and the second disk the level of stretch of extension spring is increased to enter row buffering,
And due to the transmission by main framing and time skeleton, when rock sample endoporus to be measured radially diminishes, adhering device is extended to ring-type
The resistance of meter deformation is little；This structure ensures that no matter radial displacement becomes big or diminishes in experimentation, pastes can ring-type extensometer
In hole wall, correct deformation is measured.
In the present embodiment, the one side of second disk 7 dorsad the first disk 4 is provided with support bar 8, and support bar 8 can be with
The structure of adjustable in length is set to, concrete structure adopts prior art, no longer repeated herein；Support bar 8 can be with
Fixed and support adhering device so as to which structure is more stable, pulls support bar 8 to increase the level of stretch of extension spring 5, so that
Ring-type extensometer 2 diminishes, and is easy to for ring-type extensometer 2 to be put into rock sample endoporus to be measured or the taking-up from rock sample endoporus to be measured.
In the present embodiment, the capacitance type sensor of the sensor 3, its electric capacity can change with sliding bar；Can slide
The front of motor of bar arranges a first electrode plate axially vertical with slide bar, arrange without slide bar end in ring-type extensometer opening and
The parallel second electrode plate (not indicating in figure) of first electrode plate, causes the change of distance between battery lead plate to be drawn by sliding bar
Capacitance variations are played, result is measured by the relation between capacitance variations and the deformation of ring-type extensometer is demarcated, it is also possible to set
Other structures for causing capacitive sensor electrode plate facing area or relative distance to change with sliding bar are set to, can be real
The existing purpose of the present invention；Capacitance type sensor high impedance, low power feature make it need the minimum energy of input, can sense
The micro-strain of rock sample endoporus radial direction, sensitivity is good；Heating itself is little for capacitance type sensor relative resistance formula sensor, because
And temperature stability is good；Due to the electrostatic attraction very little between battery lead plate, moving part does that can to obtain very little very thin, therefore its is intrinsic
Frequency is very high, and dynamic response time is short, can be advantageously implemented to rock sample endoporus radial direction deformation in several megahertzs of operation at frequencies
Kinetic measurement.
In the present embodiment, the capacitance type sensor includes being arranged at the battery lead plate of the annulus opening without slide bar end, institute
Battery lead plate is stated including first electrode plate 31 and the second electrode plate 32 that is parallel to each other with first electrode plate, the slide bar 21 stretches into the
Between one battery lead plate 31 and second electrode plate 32 and can along its own axial direction electrode plate surface single-degree-of-freedom slide, certain slide bar
21 need to be made using the exhausted magnetic material of insulation, and medium can be directly used air as between battery lead plate；Can when slide bar 21 slides
With the change for causing the change of facing area between first electrode plate 31 and second electrode plate 32 so as to cause electric capacity, according to formula
Electric capacity C=ε S/d (ε is the dielectric constant of medium between battery lead plate, and S is pole plate facing area, and d is the distance between battery lead plate), work as ε
With d be fixed value when, between the change of electric capacity C and the change of facing area S be linear relationship, be easy to demarcate.
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 near the end diameter of axle of battery lead plate can be contacted to be formed and can be slided along electrode plate surface single-degree-of-freedom with battery lead plate
Slide plate；Reduce the friction area between slide bar and battery lead plate so as to reduce the error that friction is caused to electric capacity.
In the present embodiment, also include for prevent the slide plate skid off the first electrode plate 31 and second electrode plate 32 it
Between stopping means；When the increase of ring-type extensometer causes slide bar to skid off between first electrode plate and second electrode plate, electric capacity is not
Change with the slip of slide bar again, beyond the range of the present invention.
In the present embodiment, the stopping means include being arranged at spring between the slide plate and annulus opening, can be with
Slide plate and without between slide bar end arrange compression spring 34, can with slide plate and have between slide bar end arrange extension spring (figure
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 aid in
Play the pretension effect that ring-type extensometer is attached at rock sample endoporus hole wall to be measured.
In the present embodiment, the stopping means also include being arranged between the first electrode plate 31 and second electrode plate 32
Limiting plate 33；Prevent the deformation of ring-type extensometer excessive and cause spring to exceed elastic deformation scope.
Finally illustrate, above example is only unrestricted to illustrate technical scheme, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, it all should cover at this
In the middle of the right of invention.
Claims (9)
1. a kind of built-in rock sample endoporus radial direction deformation test device, it is characterised in that：Including rock sample endoporus to be measured can be positioned over
Ring-type extensometer, to be measured for being attached at the ring-type extensometer that is interior and can deforming with rock sample endoporus radial deformation to be measured
The adhering device of rock sample inner hole wall and the sensor for sensing the deformation of ring-type extensometer；
The ring-type is extended and is calculated as the annulus for being provided 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 is slided.
2. built-in rock sample endoporus radial direction deformation test device according to claim 1, it is characterised in that：It is described to attach dress
Put including main framing, secondary skeleton, the first disk and the second disk；First disk, the second disk and the ring-type extensometer
The center of circle of three is conllinear, and the distance of the second disk to ring-type extensometer is less than the first disk to the distance of ring-type extensometer, and first
Extension spring is provided between disk and the second disk；One end of the main framing is articulated with the ring-type extensometer, the other end
It is articulated with the first disk；One end of described skeleton is articulated with the second disk, and the other end is articulated with main framing.
3. built-in rock sample endoporus radial direction deformation test device according to claim 2, it is characterised in that：Second circle
The one side of disk dorsad the first disk is provided with support bar.
4. built-in rock sample endoporus radial direction deformation test device according to claim 1, it is characterised in that：The sensor
Capacitance type sensor, the electric capacity of the capacitance type sensor can change with the sliding bar.
5. built-in rock sample endoporus radial direction deformation test device according to claim 4, it is characterised in that：The condenser type
Sensor includes being arranged at the battery lead plate of the annulus opening without slide bar end, and the battery lead plate is electric including first electrode plate and second
Pole plate, the slide bar stretches between first electrode plate and second electrode plate and can be along its own axial direction in electrode plate surface list freedom
Degree slides.
6. built-in rock sample endoporus radial direction deformation test device according to claim 5, 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 near the end diameter of axle of battery lead plate can be with electricity
Pole plate contacts to form the slide plate that can be slided along electrode plate surface single-degree-of-freedom.
7. built-in rock sample endoporus radial direction deformation test device according to claim 6, it is characterised in that：Also include for
Prevent the slide plate from skidding off the stopping means between the first electrode plate and second electrode plate.
8. built-in rock sample endoporus radial direction deformation test device according to claim 7, it is characterised in that：The spacing dress
Put including the spring being arranged between the slide plate and annulus opening.
9. built-in rock sample endoporus radial direction deformation test device according to claim 8, it is characterised in that：The spacing dress
Put the limiting plate for also including being arranged between the first electrode plate and second electrode plate.
Priority Applications (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 |
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106595468A true CN106595468A (en) | 2017-04-26 |
| CN106595468B CN106595468B (en) | 2019-08-13 |
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|---|---|---|---|
| CN201611176095.8A Active CN106595468B (en) | 2016-12-19 | 2016-12-19 | Built-in rock sample inner hole radial direction deformation test device |
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| CN (1) | CN106595468B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109029235A (en) * | 2018-06-26 | 2018-12-18 | 山东科技大学 | A kind of mechanical swelling type hole wall deformation sensor and monitoring application method for drilling |
| CN109855525A (en) * | 2018-12-12 | 2019-06-07 | 西安近代化学研究所 | Effect target deformation measuring device and measurement method based on dielectric elastomer |
| CN112556560A (en) * | 2021-02-22 | 2021-03-26 | 湖南联智科技股份有限公司 | Device and method for monitoring relative slippage of deep soil |
| CN112554871A (en) * | 2020-11-26 | 2021-03-26 | 中国科学院武汉岩土力学研究所 | Drilling hole diameter measuring device and measuring method thereof |
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| CN106595468B (en) | 2019-08-13 |
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