CN112985955A - Rapid immersion device and method for rock mechanics experiment test piece - Google Patents
Rapid immersion device and method for rock mechanics experiment test piece Download PDFInfo
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- CN112985955A CN112985955A CN202110223046.XA CN202110223046A CN112985955A CN 112985955 A CN112985955 A CN 112985955A CN 202110223046 A CN202110223046 A CN 202110223046A CN 112985955 A CN112985955 A CN 112985955A
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- test piece
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- piston
- experimental
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- 239000011435 rock Substances 0.000 title claims abstract description 29
- 238000007654 immersion Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 24
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000000243 solution Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 5
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
- G01N1/31—Apparatus therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A rapid immersion device for a rock mechanics experiment test piece comprises an experiment container, wherein the experiment container comprises an upper shell and a lower shell, a piston is arranged in the upper shell, and a test piece fixing device is arranged in the lower shell; an exhaust valve, a liquid injection valve and a hydraulic gauge are arranged outside the lower shell; a hydraulic valve is arranged outside the upper shell; when the device is used, the time for injecting the solution into the sample is shortened, the time is saved for rock mechanics sample experiments, the liquids with different viscosities and concentrations can be effectively injected into the sample, the sample is ensured not to be damaged, and the rock mechanics samples with different saturation degrees can be obtained easily.
Description
Technical Field
The invention relates to the technical field of rock mechanics experiments, in particular to a rapid immersion device and a rapid immersion method for a rock mechanics experiment test piece.
Background
The rock mechanics sample soaks (liquid) experiment indicates that the sample is put into solution, lets the sample reach different saturation, and it includes that the sample soaks, sample soaks cement mortar etc. and sample soaks the in-process, often can the immersion liquid under natural pressure state, and is consuming time longer, and when sample soaks liquid viscosity or density higher, liquid surface tension is great, and solution can hardly soak the sample, and the immersion time overlength can lead to the solution to solidify.
Disclosure of Invention
The invention provides a rapid immersion device and a rapid immersion method for a rock mechanics experiment test piece, and aims to solve the problems that in the prior art, immersion of a rock mechanics experiment test piece is long in time, when liquid with high viscosity, density and liquid surface tension is encountered, a solution is difficult to immerse into the test piece, the solution is solidified for a long time, and immersion samples with different saturation degrees are difficult to obtain.
The technical scheme adopted by the invention is as follows: a rapid immersion device for a rock mechanics experiment test piece comprises an experiment container, wherein the experiment container comprises an upper shell and a lower shell, a piston is arranged in the upper shell, and a test piece fixing device is arranged in the lower shell; an exhaust valve, a liquid injection valve and a hydraulic gauge are arranged outside the lower shell; and a hydraulic valve is arranged outside the upper shell.
Preferably, the upper shell and the lower shell are connected through connecting threads.
Preferably, a sealing ring is arranged at the joint of the piston and the upper shell.
Preferably, the upper end and the lower end of the piston are respectively provided with a first displacement index meter and a displacement index meter.
Preferably, a safety valve is arranged outside the lower shell.
Preferably, the test piece fixing device comprises a chute fixed at the bottom of the lower shell and a telescopic bracket arranged above the chute and connected with the chute.
Preferably, a return spring is arranged below the second displacement indicator.
A rapid immersion method for a rock mechanics experiment test piece comprises the following steps:
s1: weighing the experimental test piece to obtain an initial mass M0；
S2: placing an experimental test piece on a test piece fixing device;
s3: closing the liquid injection valve, opening the exhaust valve for vacuumizing, and exhausting air in the sample;
s4: opening a liquid injection valve, injecting a solution into the experimental container until the solution flows out of the exhaust valve, and closing the liquid injection valve and the exhaust valve;
s5: the hydraulic valve is connected with the hydraulic pump, the hydraulic valve is opened to slowly inject hydraulic oil to push the piston, so that the hydraulic pressure in the experimental container is gradually increased, the solution quickly enters the interior of the experimental test piece, and the piston displacement l and hydraulic change data delta p in the experimental container are acquired;
s6: and calculating the volume of the solution immersed in the experimental test piece and the water content of the experimental test piece according to the acquired data, and estimating the piston sinking amount and the volume change of the experimental test piece.
The invention has the beneficial effects that: (1) when the device is used, the time for injecting the solution into the sample is shortened, and the time is saved for the rock mechanics sample experiment; (2) the invention can effectively inject liquid with different viscosity and concentration into the sample and ensure that the sample is not damaged; (3) the invention can easily obtain rock mechanical samples with different saturation degrees.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of a telescopic support structure.
Detailed Description
For further explanation of the technical details and advantages of the present invention, reference will now be made to the accompanying drawings.
As shown in fig. 1, the rapid immersion device for the test piece in the rock mechanics experiment comprises an experiment container, wherein the experiment container comprises an upper shell 10 and a lower shell 16, a piston 9 is arranged in the upper shell, and a test piece fixing device is arranged in the lower shell 16; the outer part of the lower shell 16 is provided with an exhaust valve 11, a liquid injection valve 4 and a hydraulic gauge 3; the hydraulic valve 8 is arranged outside the upper shell 10.
In this embodiment, the upper case 10 and the lower case 16 are connected by the connecting thread 6; a sealing ring 12 is arranged at the joint of the piston 9 and the upper shell 10; the upper end and the lower end of the piston 9 are respectively provided with a first displacement indicator table 13 and a second displacement indicator table 2, and the two displacement indicator tables can be mutually corrected; a safety valve 5 is arranged outside the lower shell 16, and when the pressure of the experimental container is overlarge, the safety valve is automatically opened to release the pressure; the test piece fixing device comprises a chute 15 fixed at the bottom of the lower shell 16 and a telescopic bracket 1 arranged above the chute 15 and connected with the chute 15; and a return spring 14 is arranged below the second displacement indicator 2 to assist in resetting.
A rapid immersion method for a rock mechanics experiment test piece comprises the following steps:
s1: weighing the experimental test piece to obtain an initial mass M0；
S2: placing an experimental test piece on a test piece fixing device; in order to adapt to samples of different sizes and different types, the retractable bracket can be retracted left and right to adjust the size of the opening (to adapt to samples of different widths) and can be placed into the chute to be slid forwards and backwards to adjust (to adapt to samples of different lengths);
s3: closing the liquid injection valve 4, opening the exhaust valve 11, vacuumizing and discharging air in the sample;
s4: opening the liquid injection valve 4, injecting the solution into the experimental container until the solution flows out of the exhaust valve 11, and closing the liquid injection valve 4 and the exhaust valve 11;
s5: the hydraulic valve 8 is connected with a hydraulic pump, the hydraulic valve is opened to slowly inject hydraulic oil to push the piston 9, so that the hydraulic pressure in the experimental container is gradually increased, the solution quickly enters the interior of an experimental test piece, and the piston displacement l and hydraulic change data delta p in the experimental container are collected;
s6: and calculating the volume of the solution immersed in the experimental test piece and the water content of the experimental test piece according to the acquired data, and estimating the piston sinking amount and the volume change of the experimental test piece.
In this embodiment, in step S5, during the process of pushing the piston 9, the first displacement index table 13 and the first displacement indicator table 2 record the piston displacement amount, and the hydraulic pressure table 3 records the hydraulic pressure variation amount.
In step S6, the method for calculating the volume of the test specimen immersed in the solution includes:
first, the diameter of the container is obtained, and then the formula is used
And formula v2＝πR2l, calculating the volume reduction of the liquid, namely the volume of a test piece immersed by the solution in the experiment, wherein v2The liquid is immersed into the sample volume under the high pressure state; v. of1The volume of the liquid immersed in the sample under standard conditions; evIs the bulk modulus of elasticity, EvFor the example of water, its bulk modulus E is at 20 ℃ and standard atmospheric pressurev＝2.171×109Pa; r is the inner radius of the container; l is the piston sinking amount.
In step S6, the method for calculating the moisture content of the test piece includes:
opening the container under pressure relief to take out the sample, wiping the liquid on the surface of the sample with a wet towel, weighing and recording the mass M of the sample1Then according to the formula
And calculating the water content in the experimental test piece.
In step S6, the method for calculating the estimated piston sinking amount includes:
when experimental test pieces with different saturation degrees are required, according to the formula
And (4) estimating the sinking amount of the piston, wherein omega is the water content of the experimental test piece, rho is the solution density, when the piston reaches the sinking amount, stopping pressurizing, and taking out the sample to obtain the experimental test piece with the specified saturation.
In step S6, the method for calculating the volume change of the test piece includes:
Claims (13)
1. The utility model provides a quick immersion fluid device of rock mechanics experiment test piece, includes experiment container, its characterized in that: the experimental container comprises an upper shell (10) and a lower shell (16), wherein a piston (9) is arranged in the upper shell, and a test piece fixing device is arranged in the lower shell (16); an exhaust valve (11), a liquid injection valve (4) and a hydraulic gauge (3) are arranged outside the lower shell (16); and a hydraulic valve (8) is arranged outside the upper shell (10).
2. The rapid immersion device for rock mechanics experiment test piece according to claim 1, characterized in that: the upper shell (10) is connected with the lower shell (16) through a connecting thread (6).
3. The rapid immersion device for rock mechanics experiment test piece according to claim 1, characterized in that: and a sealing ring (12) is arranged at the joint of the piston (9) and the upper shell (10).
4. The rapid immersion apparatus for rock mechanics experiment test piece according to claim 1 or 3, characterized in that: and the upper end and the lower end of the piston (9) are respectively provided with a first displacement index meter (13) and a displacement indicator meter (2).
5. The rapid immersion device for rock mechanics experiment test piece according to claim 1, characterized in that: and a safety valve (5) is arranged outside the lower shell (16).
6. The rapid immersion device for rock mechanics experiment test piece according to claim 1, characterized in that: the test piece fixing device comprises a sliding groove (15) fixed at the bottom of the lower shell (16) and a telescopic support (1) arranged above the sliding groove (15) and connected with the sliding groove (15).
7. The rapid immersion device for rock mechanics experiment test piece according to claim 4, characterized in that: and a return spring (14) is arranged below the second displacement indicator (2).
8. A rapid immersion method for a rock mechanics experiment test piece is characterized in that: the method comprises the following steps:
s1: weighing the experimental test piece to obtain an initial mass M0；
S2: placing an experimental test piece on a test piece fixing device;
s3: closing the liquid injection valve (4), opening the exhaust valve (11), vacuumizing and discharging air in the sample;
s4: opening a liquid injection valve (4), injecting the solution into the experimental container until the solution flows out of an exhaust valve (11), and closing the liquid injection valve (4) and the exhaust valve (11);
s5: the hydraulic valve (8) is connected with the hydraulic pump, the hydraulic valve is opened to slowly inject hydraulic oil to push the piston (9), so that the hydraulic pressure in the experimental container is gradually increased, the solution quickly enters the experimental test piece, and the piston displacement l and hydraulic change data delta p in the experimental container are acquired;
s6: and calculating the volume of the solution immersed in the experimental test piece and the water content of the experimental test piece according to the acquired data, and estimating the piston sinking amount and the volume change of the experimental test piece.
9. The rapid immersion method for the rock mechanics experiment test piece according to claim 8, characterized in that: in the step S5, in the process of pushing the piston (9), the first displacement index table (13) and the displacement indicator table (2) record the piston displacement, and the hydraulic pressure table (3) records the hydraulic pressure variation.
10. The rapid immersion method for the rock mechanics experiment test piece according to claim 8, characterized in that: in step S6, the method for calculating the volume of the test specimen immersed in the solution includes:
first, the diameter of the container is obtained, and then the formula is used
And formula v2＝πR2l, calculating the volume reduction of the liquid, namely the volume of a test piece immersed by the solution in the experiment, wherein v2The liquid is immersed into the sample volume under the high pressure state; v. of1The volume of the liquid immersed in the sample under standard conditions; evIs the bulk modulus of elasticity; r is the inner radius of the container; l is the piston sinking amount.
11. The rapid immersion method for the rock mechanics experiment test piece according to claim 8, characterized in that: in step S6, the method for calculating the water content of the test specimen includes:
opening the container under pressure relief to take out the sample, wiping the liquid on the surface of the sample with a wet towel, weighing and recording the mass M of the sample1Then according to the formula
And calculating the water content in the experimental test piece.
12. The rapid immersion method for the rock mechanics experiment test piece according to claim 11, characterized in that: in step S6, the method for calculating the estimated piston sinking amount includes:
when experimental test pieces with different saturation degrees are required, according to the formula
And (4) estimating the sinking amount of the piston, wherein omega is the water content of the experimental test piece, rho is the solution density, when the piston reaches the sinking amount, stopping pressurizing, and taking out the sample to obtain the experimental test piece with the specified saturation.
13. The rapid immersion method for the rock mechanics experiment test piece according to claim 8, characterized in that: in step S6, the method for calculating the volume change of the test piece includes:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110223046.XA CN112985955B (en) | 2021-02-26 | 2021-02-26 | Rapid immersion method for rock mechanics experiment test piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110223046.XA CN112985955B (en) | 2021-02-26 | 2021-02-26 | Rapid immersion method for rock mechanics experiment test piece |
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| Publication Number | Publication Date |
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| CN112985955A true CN112985955A (en) | 2021-06-18 |
| CN112985955B CN112985955B (en) | 2022-04-12 |
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| CN202110223046.XA Active CN112985955B (en) | 2021-02-26 | 2021-02-26 | Rapid immersion method for rock mechanics experiment test piece |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182728A (en) * | 2011-04-20 | 2011-09-14 | 桂林电子科技大学 | Method for generating pulse hydraulic pressure |
| CN105115793A (en) * | 2015-06-26 | 2015-12-02 | 河海大学 | Method for rapidly preparing samples with different water saturations |
| CN207882021U (en) * | 2018-01-09 | 2018-09-18 | 青岛科技大学 | A kind of full water installations of rock soil test piece |
| CN209559604U (en) * | 2018-10-09 | 2019-10-29 | 河南理工大学 | A kind of coal petrography sample negative-pressure saturation device |
| CN111458255A (en) * | 2020-04-12 | 2020-07-28 | 北京工业大学 | Device for automatically testing and recording water content of rock sample in water immersion test |
| CN211904844U (en) * | 2020-04-26 | 2020-11-10 | 四川大学 | Rock sample water saturation device |
-
2021
- 2021-02-26 CN CN202110223046.XA patent/CN112985955B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182728A (en) * | 2011-04-20 | 2011-09-14 | 桂林电子科技大学 | Method for generating pulse hydraulic pressure |
| CN105115793A (en) * | 2015-06-26 | 2015-12-02 | 河海大学 | Method for rapidly preparing samples with different water saturations |
| CN207882021U (en) * | 2018-01-09 | 2018-09-18 | 青岛科技大学 | A kind of full water installations of rock soil test piece |
| CN209559604U (en) * | 2018-10-09 | 2019-10-29 | 河南理工大学 | A kind of coal petrography sample negative-pressure saturation device |
| CN111458255A (en) * | 2020-04-12 | 2020-07-28 | 北京工业大学 | Device for automatically testing and recording water content of rock sample in water immersion test |
| CN211904844U (en) * | 2020-04-26 | 2020-11-10 | 四川大学 | Rock sample water saturation device |
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| CN112985955B (en) | 2022-04-12 |
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