CN211602667U - True triaxial apparatus - Google Patents
True triaxial apparatus Download PDFInfo
- Publication number
- CN211602667U CN211602667U CN201922472210.1U CN201922472210U CN211602667U CN 211602667 U CN211602667 U CN 211602667U CN 201922472210 U CN201922472210 U CN 201922472210U CN 211602667 U CN211602667 U CN 211602667U
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a true triaxial apparatus, which comprises a pressure chamber, a first confining pressure system and a second confining pressure system, wherein the pressure chamber is connected with an oil injection pump through a confining pressure oil pipe, and the confining pressure oil pipe is provided with a first pressure sensor; two sides of the bottom in the pressure chamber are symmetrically provided with 2 square pressure covers, hydraulic bags are arranged in the square pressure covers, the hydraulic bags are respectively connected with a liquid filling pump through hydraulic pipes, and second pressure sensors are arranged on the hydraulic pipes; the top of pressure chamber is equipped with the pneumatic cylinder of taking flexible displacement sensor, is connected with the pressure column on the telescopic link of pneumatic cylinder, and the pressure column is vertical downwards and be located the centre of 2 hydraulic pressure sacs, and the bottom of pressure column is equipped with the clamp plate, is equipped with axial pressure sensor on the pressure column. The utility model belongs to real triaxial apparatus has reasonable in design, simple structure, convenient to use's characteristics.
Description
Technical Field
The utility model relates to a rock sample analytical instrument, especially a true triaxial apparatus.
Background
The triaxial apparatus is also called a triaxial shear apparatus, also called a triaxial compressor, and the core part of the triaxial shear apparatus is a triaxial pressure chamber, is provided with an axial pressure system, a lateral pressure system and the like, and is mainly used for detecting rock samples. Most of the prior rock samples for testing are cylindrical. Under the action of the pressure around a given triaxial pressure chamber, the axial additional pressure is continuously increased until the sample is sheared, and the normal stress and the ultimate shear stress on a shearing surface are calculated according to the Mohr intensity theory. The shear strength index of the rock sample can be determined according to the triaxial shear test result.
Present true triaxial apparatus pressure chamber sample confined pressure often provides through the hydraulic stem, and when the sample warp great, the friction of hydraulic stem and sample is great, influences the measuring result. Therefore, it is necessary to design a true triaxial apparatus that does not affect each other by designing the pressure in three directions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a true triaxial apparatus. The utility model belongs to real triaxial apparatus has reasonable in design, simple structure, convenient to use's characteristics.
The technical scheme of the utility model: a true triaxial apparatus is characterized in that the apparatus is provided with a pressure chamber, the pressure chamber is connected with an oil injection pump through a confining pressure oil pipe, and the confining pressure oil pipe is provided with a first confining pressure sensor; two sides of the bottom in the pressure chamber are symmetrically provided with 2 square pressure covers, hydraulic bags are arranged in the square pressure covers, the hydraulic bags are respectively connected with a liquid filling pump through hydraulic pipes, and second confining pressure sensors are arranged on the hydraulic pipes; the top of pressure chamber is equipped with the pneumatic cylinder of taking flexible displacement sensor, is connected with the pressure column on the telescopic link of pneumatic cylinder, and the pressure column is vertical downwards and be located the centre of 2 hydraulic pressure sacs, and the bottom of pressure column is equipped with the clamp plate, is equipped with axial pressure sensor on the pressure column.
In the true triaxial apparatus, the opposite side of the square pressure cover 13 is open.
In the true triaxial apparatus, 1 pressure cover tongue is respectively arranged on the opposite inner sides of the square pressure covers, the pressure cover tongues are connected with the corresponding square pressure covers and are positioned on two sides of the sample, and the function of the true triaxial apparatus is to limit the hydraulic bag from extruding out of the pressure chamber when the sample deforms.
The utility model has the advantages that:
the utility model discloses a both sides in the pressure chamber set up the hydraulic bag, set up the pressure column at the top, the hydraulic bag of both sides extrudees to the centre, regards as X axle pressure, and the top pressure column exerts pressure, regards as Z axle pressure, and the region that is not covered by hydraulic bag and pressure column around the rock sample extrudees through the confined pressure oil of pressure chamber inside, forms the pressure of Y axle direction to X, Y and the pressure of Z triaxial direction have been realized, belong to a real triaxial apparatus, the utility model discloses a triaxial apparatus's structural design is reasonable, simple structure, and it is also very convenient to use; additionally, the utility model discloses a set up square pressure cover outside the hydraulic pressure bag, the hydraulic pressure bag inflation back, extrude from relative inboard to form the extrusion to the rock sample. Meanwhile, by designing the pressure cover tongue, the pressure of the hydraulic bag can be completely and uniformly applied to the rock sample, the hydraulic bag is prevented from being extruded from the side face of the rock sample, and the design rationality is further improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a top view of the pressure chamber of fig. 1.
Description of reference numerals: 1-a pressure chamber, 2-a confining pressure oil pipe, 3-an oil injection pump, 4-a first confining pressure sensor, 5-a hydraulic bag, 6-a hydraulic pipe, 7-a liquid filling pump, 8-a second confining pressure sensor, 9-a hydraulic cylinder, 10-a pressure column, 11-a pressing plate, 12-an axial pressure sensor, 13-a square pressure cover and 14-a pressure cover tongue.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
The embodiment of the utility model provides a:
a true triaxial apparatus is shown in the attached figure 1-2, and comprises a pressure chamber 1, wherein the outside of the pressure chamber 1 is connected with an oil injection pump 3 through a confining pressure oil pipe 2, and the confining pressure oil pipe 2 is provided with a first confining pressure sensor 4; two sides of the bottom in the pressure chamber 1 are symmetrically provided with 2 square pressure covers 13, a hydraulic bag 5 is arranged in each square pressure cover 13, the hydraulic bags 5 are respectively connected with a liquid filling pump 7 through a hydraulic pipe 6, and the hydraulic pipe 6 is provided with a second confining pressure sensor 8; the top of pressure chamber 1 is equipped with the pneumatic cylinder 9 of taking flexible displacement sensor, is connected with pressure column 10 on the telescopic link of pneumatic cylinder 9, and pressure column 10 is vertical downwards and be located 2 hydraulic pressure sacs 5's centre, and the bottom of pressure column 10 is equipped with clamp plate 11, is equipped with axial pressure sensor 12 on the pressure column 10.
When the pressure-bearing hydraulic pressure-bearing device works, a square rock sample is firstly placed between the hydraulic bags 5, then the pressure chamber 1 is closed, the pressure column 10 in the Z-axis direction moves downwards, and certain pressure in the Z-axis direction is provided; then, oil is injected into the pressure chamber 1 through the oil injection pump 3, liquid is injected into the hydraulic bag 5 through the liquid filling pump 7, the pressures in the pressure chamber 1 and the hydraulic bag 5 are respectively read through the first confining pressure sensor 4 and the second confining pressure sensor 8, the hydraulic bag 5 is respectively extruded at the left side and the right side of the rock sample after being filled with the liquid, pressure in the X-axis direction is provided, and the front side and the rear side of the rock sample are acted by confining pressure oil in the pressure chamber 1 to form pressure in the Y-axis direction. In the pressure applying process, the criterion of Z-axis pressure > X-axis pressure > Y-axis pressure is followed. The Z-axis pressure is read by an axial pressure sensor 12, the displacement change in the Z-axis direction is read by a telescopic displacement sensor in the hydraulic cylinder 9, the telescopic displacement sensor can be an existing magnetostrictive displacement sensor integrated in the hydraulic cylinder 9, and can sense the displacement of a pressure column 10 connected with the hydraulic cylinder 9 and provide displacement data for measurement; meanwhile, in order to reduce the error caused by the compression amount of the pressure column 10 to the compression deformation amount of the rock sample, the pressure column 10 needs to be made of a material with high hardness and small compression deformation amount.
Preferably, 1 square pressure cover 13 is arranged outside each hydraulic bag 5, and the opposite sides of the square pressure covers 13 on the two sides are opened. When the hydraulic bladder 5 is filled with liquid, the portion of the bladder that is surrounded by the square pressure jacket 13 is not deformed, and the main deformation is concentrated on the side of the opening. Because the second confining pressure is provided by the hydraulic bag, the pressure value is more stable and easy to measure.
Preferably, 1 pressure cover tongue 14 is respectively arranged on the opposite inner sides of the square pressure cover 13, the pressure cover tongues 14 are fixedly connected with the corresponding square pressure covers 13 and are positioned on the two sides of the rock sample, when the liquid is filled, the two sides of the rock sample are pressed along with the deformation of the hydraulic bag 5, a second confining pressure is provided, and the pressure cover tongues 14 prevent the hydraulic bag 5 from being extruded from the front side and the rear side of the rock sample, so that the pressure is fully utilized.
The above description is only for the purpose of illustrating the present invention and the appended claims, and the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (3)
1. A true triaxial apparatus is characterized in that: the device comprises a pressure chamber (1), wherein an oil injection pump (3) is connected outside the pressure chamber (1) through a confining pressure oil pipe (2), and a first confining pressure sensor (4) is arranged on the confining pressure oil pipe (2); two sides of the bottom in the pressure chamber (1) are symmetrically provided with 2 square pressure covers (13), hydraulic bags (5) are arranged in the square pressure covers (13), the hydraulic bags (5) are respectively connected with a liquid filling pump (7) through hydraulic pipes (6), and the hydraulic pipes (6) are provided with second confining pressure sensors (8); the top of pressure chamber (1) is equipped with pneumatic cylinder (9) of taking flexible displacement sensor, is connected with pressure column (10) on the telescopic link of pneumatic cylinder (9), and pressure column (10) are vertical downwards and are located the centre of 2 hydraulic pressure bags (5), and the bottom of pressure column (10) is equipped with clamp plate (11), is equipped with axial pressure sensor (12) on pressure column (10).
2. True triaxial apparatus according to claim 1, wherein: and one side of the square pressure cover (13) opposite to the opening is provided with an opening.
3. True triaxial apparatus according to claim 2, wherein: the front end of the square pressure cover (13) is provided with 2 pressure cover tongues (14), and the pressure cover tongues (14) are positioned on the front side and the rear side of the sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922472210.1U CN211602667U (en) | 2019-12-31 | 2019-12-31 | True triaxial apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922472210.1U CN211602667U (en) | 2019-12-31 | 2019-12-31 | True triaxial apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211602667U true CN211602667U (en) | 2020-09-29 |
Family
ID=72598907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922472210.1U Expired - Fee Related CN211602667U (en) | 2019-12-31 | 2019-12-31 | True triaxial apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211602667U (en) |
-
2019
- 2019-12-31 CN CN201922472210.1U patent/CN211602667U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200929 Termination date: 20211231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |