CN211904933U - Rock sample experimental device - Google Patents
Rock sample experimental device Download PDFInfo
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- CN211904933U CN211904933U CN202020648873.4U CN202020648873U CN211904933U CN 211904933 U CN211904933 U CN 211904933U CN 202020648873 U CN202020648873 U CN 202020648873U CN 211904933 U CN211904933 U CN 211904933U
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Abstract
The utility model discloses a rock sample experimental apparatus belongs to rock mechanics experiment technical field. A rock sample experimental apparatus comprising: the testing device comprises a shell, and a heating assembly, a pressurizing assembly and a testing piece which are connected with the shell; the shell comprises an upper shell and a lower shell which are mutually buckled and detachably connected along the vertical direction; the top of the upper shell is provided with an upper pressure head, the upper pressure head penetrates through the top of the upper shell and is in sliding fit with the upper shell, the side wall of the upper pressure head is provided with a limiting bulge, and the limiting bulge is positioned on the inner side of the upper shell; the bottom of the lower shell is provided with a lower pressure head corresponding to the upper pressure head. The utility model discloses can simulate dark rock mass high temperature, high stress, the pressurized real existence environment of pore water pressure, obtain the deformation and the destruction condition of rock mass sample, the test data deviation that obtains is less to can provide the experiment support for dangerous evaluation of engineering and stability prediction.
Description
Technical Field
The utility model relates to a rock mechanics experiment technical field, concretely relates to rock sample experimental apparatus.
Background
The deep rock mechanics problem can be encountered in the projects of dam construction, tunnel excavation, deep resource exploitation and the like, the research on the interaction of rock and occurrence environment is an important research direction of rock mechanics, and the method has important significance on engineering risk evaluation, stability prediction and the like.
In practical engineering, the rock is often in direct contact with water, and the rock is subjected to a certain water pressure while interacting with the water. In addition, as the buried depth is increased, the ground stress borne by the rock mass is increased, and the formation temperature is obviously increased, so that the deep rock mass has nonlinear and irreversible mechanical characteristics.
At present, when a mechanical experiment is carried out on a rock sample, the rock sample is simply pressurized, or the rock sample is pressurized in a water immersion environment, so that real occurrence environments such as high temperature, high stress, water pressure and the like of a deep rock body cannot be simulated, and the obtained experimental data has large deviation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rock sample experimental apparatus to solve present rock mechanics experiment and can not simulate occurrence environment such as deep rock mass place high temperature, high stress, water pressure completely, thereby the experimental data that leads to obtaining has the problem of great deviation.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a rock sample experimental apparatus comprising: the testing device comprises a shell, and a heating assembly, a pressurizing assembly and a testing piece which are connected with the shell; the shell comprises an upper shell and a lower shell which are mutually buckled and detachably connected along the vertical direction; the top of the upper shell is provided with an upper pressure head, the upper pressure head penetrates through the top of the upper shell and is in sliding fit with the upper shell, the side wall of the upper pressure head is provided with a limiting bulge, and the limiting bulge is positioned on the inner side of the upper shell; the bottom of the lower shell is provided with a lower pressure head corresponding to the upper pressure head.
The utility model discloses a heating element is used for simulating high temperature environment, the pressure components is used for simulating hole hydraulic pressure environment, on, the both ends contact of lower pressure head and rock sample, apply axial load in last pressure head through the experiment machine, a stress state for simulating the certain rock of burying deeply, the test piece is used for measuring the axial deformation of rock sample, thereby simulate high temperature, the high stress, hydraulic true occurrence environment, obtain the deformation and the destruction condition of rock sample, the test data deviation that obtains is less, thereby can provide theoretical support for engineering danger evaluation and stability prediction.
In addition, the casing is two segmentations, and the getting of rock sample of being convenient for is put, goes up the spacing arch of pressure head and can avoid going up the pressure head under the effect of pressure and break away from and take place danger with last casing, and the casing of two segmentations can also conveniently have spacing bellied pressure head and the installation of rock sample.
Further, above-mentioned heating element includes heating ring and temperature sensor, and the heating ring cover is established in the outside of casing, and temperature sensor sets up the position of keeping away from the heating ring at the casing.
The utility model discloses the heating ring is used for heating the inside temperature of casing, and temperature sensor is used for measuring the inside temperature of casing, and simultaneously, when temperature sensor set up the position of keeping away from the heating ring at the casing, can avoid because temperature gradient and lead to judging inaccurately to the temperature in the casing, simultaneously, temperature sensor's temperature measurement part is close the sample surface to true reaction test piece temperature.
Further, above-mentioned pressure components includes fluid input pipe and manometer, and fluid input pipe and the inner chamber top intercommunication of last casing, the manometer setting is at the top of last casing.
The utility model discloses a fluid input tube can be to input water and gas in the casing, adjusts the water pressure in the casing through water and gas, and the pressurization is easy and water pressure changes steadily, is favorable to going on of experiment.
In the conventional experiment, only exert water pressure to the rock sample, because water is difficult to be compressed and results in that the pressurization is difficult to or pressure variation is less, be unfavorable for going on of experiment. The utility model discloses when the pressurization, at first pour into water into the casing into, be full of until submerging the rock sample or with the inner chamber of casing, then pour into the gas of certain pressure into to the inside of casing to produce water pressure, because water pressure changes steadily, and atmospheric pressure changes slowly, makes the water pressure that is used in on the rock sample can slowly, steadily increase, is favorable to going on of experiment.
Furthermore, the fluid input pipe is provided with a first valve and a gas flowmeter.
The utility model discloses a first valve and gas flowmeter are used for controlling fluidic velocity of flow, especially gaseous velocity of flow, the speed that adjustment water pressure rises.
Further, the test piece is a linear displacement sensor.
The utility model discloses a linear displacement sensor is arranged in the axial displacement who detects the test in-process sample.
Further, the rock sample experimental device further comprises a fluid output pipe and a second valve arranged on the fluid output pipe, and the fluid output pipe is communicated with the bottom of the inner cavity of the lower shell.
The utility model discloses a fluid output tube is used for the experiment to accomplish the fluid in the back discharge casing.
Furthermore, a first high-temperature sealing gasket is arranged at the contact position between the upper shell and the lower shell, and a second high-temperature sealing gasket is arranged at the contact position between the upper shell and the upper pressure head.
The utility model discloses set up the high temperature and seal up in each hookup location, ensure under high temperature environment, also can seal, guarantee that seepage phenomenon can not appear under high temperature, the high-pressure environment, ensure going on smoothly of experiment.
Furthermore, a concentric stepped hole is formed in the top of the lower pressure head, and a matched cushion block is arranged in the concentric stepped hole.
The utility model discloses a concentric shoulder hole is used for placing the rock sample of different specifications, supports rock sample bottom through the cushion to can experiment different rock samples.
Furthermore, the bottom of the lower pressure head is provided with a centering hole.
The utility model discloses a centering hole is used for being connected with the axis locating pin of laboratory bench, ensures the axis coincidence of the axis of rock sample and experiment machine pressure head.
The utility model discloses following beneficial effect has:
(1) the utility model discloses can simulate dark rock mass high temperature, high stress, the pressurized real existence environment of pore water pressure, obtain the deformation and the destruction condition of rock mass sample, the test data deviation that obtains is less to can provide theoretical support for dangerous evaluation of engineering and stability prediction.
(2) The utility model discloses an upper and lower casing design, the dismouting is simple, the connection is stable, sealed reliable, getting of rock experiment is put simply, swiftly, each part can not break away from under the effect of pressure, has reduced danger under high temperature, pressure state, in addition, for "lid-bucket structure", the design of upper and lower casing has disperseed the lid and has covered the partial pressure of bucket sealing department in the pressurization process, has improved the stability and the leakproofness of device.
(3) The utility model discloses heating element's setting can avoid leading to judging inaccurately to the temperature in the casing because of temperature gradient.
(4) The utility model discloses when carrying out hole water pressure pressurization, because water pressure changes steadily to atmospheric pressure changes slowly, makes the water pressure that is used in on the rock sample slowly, steadily increase, is favorable to going on of experiment.
Drawings
FIG. 1 is a schematic structural diagram of a rock sample experimental device according to the present invention;
fig. 2 is the utility model discloses a rock sample experimental apparatus is at the schematic structure diagram when testing rock sample.
In the figure: 10-an upper shell; 11-an upper pressure head; 12-a limit protrusion; 20-a lower shell; 21-lower pressure head; 22-concentric stepped bore; 23-centering holes; 24-a cushion block; 31-a heating ring; 32-a temperature sensor; 41-fluid input pipe; 42-pressure gauge; 43-a first valve; 44-a gas flow meter; 51-a fluid outlet pipe; 52-a second valve; 60-a first high temperature seal; 70-a second high temperature seal; 80-lugs; 81-connecting bolts; 90-rock sample.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Examples
Referring to fig. 1, a rock sample testing apparatus includes: the device comprises a shell, and a heating assembly, a pressurizing assembly, a test piece and a fluid output assembly which are respectively arranged on the shell. The heating assembly is used for simulating a high-temperature environment; the pressurizing assembly is used for inputting a fluid simulation pressure environment into the shell; the test piece is used for measuring the axial deformation of the rock sample; the fluid output assembly is used for discharging fluid in the shell after the test is finished; the rock sample in the shell can be axially pressurized through an external testing machine, and high stress in the rock can be simulated. The deformation and flat failure conditions of the rock mass sample are obtained by simulating a real occurrence environment of high temperature, high stress and pore water pressure pressurization, and the obtained test data has small deviation, so that theoretical support can be provided for engineering risk evaluation and stability prediction.
The casing includes last casing 10 and the lower casing 20 that sets gradually from the top down, goes up casing 10 and the equal end opening of lower casing 20 to go up the opening part lock of casing 10 and lower casing 20. The opening edge of going up casing 10 and casing 20 all is equipped with lug 80 down, goes up casing 10 and casing 20 lock back down, links together last casing 10 and casing 20 through connecting bolt 81, and the position of going up casing 10 and casing 20 contact down is equipped with first high temperature sealing gasket 60 simultaneously, avoids causing the leakage under high environment. In other embodiments of the present invention, the connection between the upper housing 10 and the lower housing 20 can also be detachable such as a snap connection.
The top of the upper shell 10 is provided with an upper pressure head 11, the upper pressure head 11 penetrates through the top of the upper shell 10 and is in sliding fit with the upper shell 10, and under the action of the experiment machine, the upper pressure head 11 slides with the upper shell 10 to realize the pressing of the rock sample 90. The lateral wall of the upper pressure head 11 is provided with a limiting protrusion 12, and the limiting protrusion 12 is positioned in the inner cavity of the upper shell 10, so that the upper pressure head 11 is prevented from sliding out of the upper shell 10 to cause danger under the action of water pressure. A second high-temperature sealing gasket 70 is arranged at the contact position of the upper shell 10 and the upper pressure head 11, so that leakage caused in a high-temperature and high-pressure environment is avoided.
The bottom of casing 20 is equipped with down the pressure head 21 down, and the top of pressure head 21 is equipped with concentric shoulder hole 22 down for place the rock sample 90 of different specifications, the bottom of pressure head 21 is equipped with centering hole 23 down, is used for being connected with the axis locating pin of laboratory bench, ensures the axis of rock sample 90 and the coincidence of the axis of laboratory bench pressure head. The inside of concentric shoulder hole 22 is equipped with supporting cushion 24, removes corresponding cushion 24, can make rock sample 90 spacing through concentric shoulder hole 22 to remaining cushion 24 can support rock sample 90, guarantees the accuracy of experiment. In the present embodiment, the central axis of the concentric stepped hole 22 coincides with the central axis of the centering hole 23.
The heating assembly comprises a heating ring 31 and a temperature sensor 32. The heating ring 31 is sleeved on the outer side of the shell, and the temperature sensor 32 is arranged on the top of the shell. In the present embodiment, the number of the heating rings 31 is 2, and the heating rings are respectively sleeved outside the upper casing 10 and the lower casing 20. In order to make the heating more uniform, the number of the heating rings 31 may be 3, 4, 5, etc. which are respectively sleeved outside the upper casing 10 and the lower casing 20. In order to avoid the temperature sensor 32 from being affected by the temperature gradient, the temperature sensor 32 is disposed at a position far away from the heating ring 31, and in the present embodiment, the temperature sensor 32 is disposed at the top of the upper casing 10, obviously, the temperature sensor 32 may also be disposed at the bottom of the lower casing 20. To accurately measure the sample temperature, the temperature sensing component of the temperature sensor 32 is brought into close proximity to the surface of the rock sample.
The pressurizing assembly includes a fluid input tube 41 and a pressure gauge 42. The fluid input pipe 41 is communicated with the top of the upper casing 10 for inputting liquid and gas into the casing, and the fluid input pipe 41 is provided with a first valve 43 and a gas flow meter 44 for controlling the amount of the input liquid or gas. A pressure gauge 42 is provided on the top of the upper case 10 for measuring the pressure inside the case.
And the test piece position linear displacement sensor is positioned outside the upper pressure head 11 and used for measuring the deformation of the rock test sample 90 in the axial direction.
The fluid outlet assembly comprises a fluid outlet pipe 51 and a second valve 52 disposed on the fluid outlet pipe 51, the fluid outlet pipe 51 is communicated with the bottom of the lower housing 20 for discharging the liquid in the housing.
Referring to fig. 2, the utility model discloses a rock sample experimental apparatus's experimentation:
(1) placing the lower shell 20 on a laboratory bench, and placing the pin shaft on the laboratory bench in the centering hole 23;
(2) selecting a proper step hole cushion block 24 according to the size of the rock sample, and vertically placing the rock sample 90 into a concentric step hole 22 of a lower pressure head 21;
(3) the upper pressure head 11 penetrates through the top of the upper shell 10 from the inside of the upper shell 10, and a second high-temperature sealing gasket 70 is arranged at the contact position between the upper shell 10 and the upper pressure head 11, so that the upper pressure head 11 and the second high-temperature sealing gasket 70 cannot fall off under the action of friction force;
(4) the upper shell 10 is buckled on the lower shell 20, a first high-temperature sealing gasket 60 is arranged at the contact position between the upper shell 10 and the lower shell 20, and the upper shell 10 and the lower shell 20 are connected through bolts;
(5) filling the housing with water through the fluid inlet tube 41 until the housing is filled with water (at least submerging the rock sample);
(6) the fluid input pipe 41 is communicated with a nitrogen gas bottle, nitrogen gas with certain pressure is applied to the inside of the shell to adjust the pressure in the shell, and meanwhile, the medium in the shell is heated through the heating ring 31;
(7) starting the single-shaft creep machine, and applying an axial load to the upper pressure head 11 by the single-shaft creep machine pressure head so as to perform an experiment on the rock sample 90;
(8) after the experiment is completed, the fluid input pipe 41 is cut off by the first valve 43, then the second valve 52 is opened, the water in the housing is discharged, the upper housing 10 is detached, and finally the rock sample 90 is taken out.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. A rock sample experimental apparatus, comprising: the testing device comprises a shell, and a heating assembly, a pressurizing assembly and a testing piece which are connected with the shell; the shell comprises an upper shell (10) and a lower shell (20) which are mutually buckled and detachably connected along the vertical direction; an upper pressure head (11) is arranged at the top of the upper shell (10), the upper pressure head (11) penetrates through the top of the upper shell (10) and is in sliding fit with the upper shell (10), a limiting protrusion (12) is arranged on the side wall of the upper pressure head (11), and the limiting protrusion (12) is located on the inner side of the upper shell (10); and a lower pressure head (21) corresponding to the upper pressure head (11) is arranged at the bottom of the lower shell (20).
2. The rock sample testing apparatus of claim 1, wherein the heating assembly comprises a heating ring (31) and a temperature sensor (32), the heating ring (31) is sleeved on the outer side of the housing, and the temperature sensor (32) is arranged at a position of the housing far away from the heating ring (31).
3. The rock sample testing apparatus of claim 1, wherein the pressurizing assembly comprises a fluid input tube (41) and a pressure gauge (42), the fluid input tube (41) is communicated with the top of the inner cavity of the upper housing (10), and the pressure gauge (42) is disposed on the top of the upper housing (10).
4. A rock sample experimental apparatus according to claim 3, characterized in that the fluid input pipe (41) is provided with a first valve (43) and a gas flow meter (44).
5. The rock sample testing apparatus of claim 1, wherein the test piece is a linear displacement transducer.
6. The rock sample testing apparatus of claim 1, further comprising a fluid outlet pipe (51) and a second valve (52) disposed on the fluid outlet pipe (51), wherein the fluid outlet pipe (51) is in communication with the bottom of the inner cavity of the lower housing (20).
7. The rock sample testing device according to any one of claims 1 to 6, characterized in that a first high temperature sealing gasket (60) is provided at the contact position between the upper housing (10) and the lower housing (20), and a second high temperature sealing gasket (70) is provided at the contact position between the upper housing (10) and the upper pressure head (11).
8. The rock sample experimental device according to claim 7, characterized in that the top of the lower pressure head (21) is provided with a concentric stepped hole (22), and the inside of the concentric stepped hole (22) is provided with a matched cushion block (24).
9. A rock sample experimental apparatus according to claim 8, characterized in that the bottom of the lower pressure head (21) is provided with a centering hole (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020648873.4U CN211904933U (en) | 2020-04-26 | 2020-04-26 | Rock sample experimental device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020648873.4U CN211904933U (en) | 2020-04-26 | 2020-04-26 | Rock sample experimental device |
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| CN211904933U true CN211904933U (en) | 2020-11-10 |
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| CN202020648873.4U Active CN211904933U (en) | 2020-04-26 | 2020-04-26 | Rock sample experimental device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029797A (en) * | 2021-03-15 | 2021-06-25 | 河海大学 | Rock hydraulic coupling creep test equipment |
| CN115420633A (en) * | 2022-07-15 | 2022-12-02 | 中国石油大学(华东) | Device and method for testing effect of stress-drilling fluid flowing-hydration on stratum |
-
2020
- 2020-04-26 CN CN202020648873.4U patent/CN211904933U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029797A (en) * | 2021-03-15 | 2021-06-25 | 河海大学 | Rock hydraulic coupling creep test equipment |
| CN115420633A (en) * | 2022-07-15 | 2022-12-02 | 中国石油大学(华东) | Device and method for testing effect of stress-drilling fluid flowing-hydration on stratum |
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