Rock mechanical property testing device

Abstract

The utility model discloses a rock mechanical property test device, and relates to the technical field of geological engineering, the rock mechanical property test device comprises a test board and a sizing sleeve, a pressure detection unit is arranged in the middle of the test board, and a plurality of positioning columns are arranged on the test board in the circumferential direction around the pressure detection unit; a first inclined surface gradually expanding outwards in the radial direction of the positioning column is arranged at one end, far away from the pressure detection unit, of the positioning column; the sizing sleeve is arranged between the positioning columns, the sizing sleeve and the positioning columns are designed in a split mode, the outer periphery of the sizing sleeve is provided with a second inclined face attached to the first inclined face, the inner periphery of the sizing sleeve is provided with a third inclined face, and the third inclined face is gradually contracted inwards from the end close to the detection unit to the end away from the detection unit in the radial direction of the sizing sleeve. The positioning device can adaptively adjust rock cores of different sizes to complete positioning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geological engineering, in particular to a rock mechanical property testing device. BACKGROUND

[0002] In rock mechanics, in order to accurately understand the mechanical properties of rock, especially to obtain accurate parameters of rock strength, it is necessary to verify through experiments such as rock uniaxial compression experiment and Brazilian splitting experiment.

[0003] In the rock uniaxial compression experiment, the experimental core needs to be coaxial with the pressure sensor to ensure coaxial transmission of force, but usually the positioning of the core is determined by the shaft sleeve coaxial with the pressure sensor, and the core needs to be in close contact with the shaft sleeve, which leads to the fact that only the core of a certain size can be positioned in the shaft sleeve, and the cores of other sizes cannot be positioned well, which has the problem of poor practicability. CONTENT OF THE INVENTION

[0004] The main purpose of the present application is to provide a rock mechanical property testing device, which aims to solve the above technical problems.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A rock mechanical property testing device comprises:

[0007] A test table is centrally provided with a pressure detection unit, and the test table is provided with a plurality of positioning columns around the pressure detection unit, and the end of the positioning column away from the pressure detection unit is provided with a first inclined surface gradually expanding outward along the radial direction of the positioning column;

[0008] A sizing sleeve is arranged between the positioning columns, and the sizing sleeve and the positioning column are designed in a split type, the outer periphery of the sizing sleeve is provided with a second inclined surface in close contact with the first inclined surface, and the inner periphery of the sizing sleeve is provided with a third inclined surface gradually inwardly converging from the end close to the detection unit to the end away from the detection unit along the radial direction of the sizing sleeve.

[0009] Optionally, a I-shaped pressure transmission shaft is movably arranged in the sizing sleeve, and the pressure transmission shaft can be extended and retracted in the axial direction of the sizing sleeve.

[0010] Optionally, the first inclined surface is provided with a support step close to the end of the pressure detection unit for supporting the sizing sleeve.

[0011] Optionally, the outer periphery of the sizing sleeve is provided with a handle.

[0012] Optionally, the detection unit comprises a pressure sensor and a pressure bearing plate, the pressure sensor is installed on the test table, the pressure bearing plate is fixed on the pressure sensor, and the pressure sensor is connected to the data acquisition unit through a data line.

[0013] Optionally, the test table is centrally provided with a slot hole, the pressure sensor is installed in the slot hole and exposed from the slot hole.

[0014] Optionally, the test table is internally provided with a wiring slot for arranging the data line.

[0015] Optionally, the test table is provided with a stand, the top end of the stand is provided with a top plate, and the top plate is centrally provided with a pressure applying assembly.

[0016] Optionally, the pressure applying assembly comprises an automatic telescopic cylinder and a pressure block, the automatic telescopic cylinder is fixed to the top plate, and the pressure block is fixed to the output end of the automatic telescopic cylinder.

[0017] Optionally, the automatic telescopic cylinder is coaxial with the sizing sleeve.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] The rock mechanical property testing device provided by the embodiment of the application comprises a test table and a sizing sleeve, the test table is centrally provided with a pressure detection unit, the test table is circumferentially provided with a plurality of positioning columns around the pressure detection unit, one end of the positioning column away from the pressure detection unit is provided with a first inclined surface gradually expanding outward along the radial direction of the positioning column; the sizing sleeve is arranged between the positioning columns, and the sizing sleeve and the positioning column are designed in a split type, the outer periphery of the sizing sleeve is provided with a second inclined surface matched with the first inclined surface, and the inner periphery of the sizing sleeve is provided with a third inclined surface, the third inclined surface gradually converges inward along the radial direction of the sizing sleeve from the end close to the detection unit to the end away from the detection unit, the rock core to be tested is placed on the pressure detection unit, the sizing sleeve is placed between the positioning columns, the axial positioning of the sizing sleeve is completed by the cooperation of the first inclined surface and the second inclined surface, the sizing sleeve is coaxial with the pressure detection unit, and in the process of placing the sizing sleeve under the sizing sleeve, the rock core is gradually extruded to be coaxial with the sizing sleeve by the gradually converging inner diameter of the sizing sleeve, so that the rock core to be tested is coaxially transmitted by the pressure sensor, and the positioning of the rock core of different sizes is completed by self-adaptive adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structural schematic diagram of the rock mechanical property testing device provided by the embodiment of the application is shown in one view;

[0021] Figure 2 The internal structure schematic diagram of the sizing sleeve in use.

[0022] Explanation of reference numerals in the drawings:

[0023] 1-test bench, 2-pressure sensor, 3-pressure bearing plate, 4-data line, 5-positioning column, 6-first inclined surface, 7-supporting step, 8-diameter setting sleeve, 9-second inclined surface, 10-third inclined surface, 11-pressure transmission shaft, 12-stand column, 13-automatic telescopic cylinder, 14-pressing block, 15-top plate, 16-grip handle. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0026] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In addition, if there is a description of "first", "second" and the like in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those skilled in the art can realize it. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0028] Referring to the drawings Figure 1 The rock mechanical property testing device provided by the embodiment of the present application comprises a testing table 1, a diameter setting sleeve 8 and a pressure applying assembly. The testing table 1 is centrally provided with a pressure detection unit, which comprises a pressure sensor 2 and a pressure receiving plate 3. In order to facilitate the installation of the pressure sensor 2, a slot hole is arranged in the center of the testing table 1, the pressure sensor 2 is embedded in the slot hole, and the detection end of the pressure sensor 2 is exposed outside the slot hole and fixedly connected with the pressure receiving plate 3. The pressure receiving plate 3 is centrally provided with a through hole, and the detection end of the pressure sensor 2 is interference-fitted in the through hole in the center of the pressure receiving plate 3. During the experiment, the rock core 17 to be tested is placed on the pressure receiving plate 3, and the force is transmitted to the pressure sensor 2 through the pressure receiving plate 3. The pressure sensor 2 transmits the monitored pressure signal to a data acquisition unit through a data line 4 for data analysis. Of course, in order to avoid the experimental table being tidy, a wiring slot is arranged in the inside of the testing table 1 for installing and arranging the data line 4.

[0029] It can be understood that the pressure sensor 2 and the data acquisition unit are conventional settings in the field, and thus will not be described here.

[0030] In the embodiment, as shown in Figure 1 , the testing table 1 is circumferentially provided with a plurality of positioning columns 5 around the pressure detection unit, the positioning columns 5 are integrally formed with the testing table 1, and the ends of the positioning columns 5 away from the pressure detection unit are provided with first inclined surfaces 6. The first inclined surfaces 6 gradually expand outward along the radial direction of the positioning columns 5 from the end close to the pressure detection unit to the end away from the pressure detection unit, that is, the inner region surrounded by all the positioning columns 5 forms a flared state.

[0031] At the same time, the diameter setting sleeve 8 is arranged inside the region surrounded by the positioning columns 5, and the diameter setting sleeve 8 is designed in a separate manner from the positioning columns 5. The positioning sleeve can be freely taken out from the inside of the positioning columns 5, and the outer periphery of the diameter setting sleeve 8 is provided with a second inclined surface 9 which is in abutment with the first inclined surface 6. It can be easily imagined that by placing the diameter setting sleeve 8 between the positioning columns 5, the position of the diameter setting sleeve 8 can be automatically adjusted by the abutment design of the first inclined surface 6 and the second inclined surface 9, so that the central axis of the diameter setting sleeve 8 is coaxial with the central axis of the region surrounded by all the positioning columns 5, that is, the central axis of the diameter setting sleeve 8 is coaxial with the pressure sensor 2. In addition, as shown in Figure 2 , the inner periphery of the diameter setting sleeve 8 is provided with a third inclined surface 10 which gradually converges inward along the radial direction of the diameter setting sleeve 8 from the end close to the detection unit to the end away from the detection unit, that is, the inner diameter of the diameter setting sleeve 8 gradually decreases from the end close to the detection unit to the end away from the detection unit, and the maximum inner diameter of the diameter setting sleeve 8 can accommodate the largest diameter rock core, and the minimum inner diameter of the diameter setting sleeve 8 can accommodate the smallest diameter rock core.

[0032] It is easy to imagine that during the experiment, the rock core 17 to be tested is randomly placed on the pressure plate 3, and the sizing sleeve 8 is placed inside the positioning column 5. The axial positioning of the sizing sleeve 8 is completed by the cooperation of the first inclined surface 6 and the second inclined surface 9. Then, the gradually decreasing inner diameter of the sizing sleeve 8 forms a surrounding compression on the rock core 17, so that the rock core 17 adaptively adjusts its position to be coaxial with the sizing sleeve 8, thereby completing the positioning of the rock core 17. Since the inner diameter of the sizing sleeve 8 can accommodate rock cores of different sizes, the rock mechanical property testing device provided in this application embodiment can be used for positioning and adjustment of rock cores of different sizes.

[0033] In a preferred embodiment, to facilitate the support of the positioning post 5 for the sizing sleeve 8, such as... Figure 1 As shown, the first inclined surface 6 has a support step 7 for supporting the sizing sleeve 8 at one end near the pressure detection unit. It can be imagined that when the sizing sleeve 8 is placed inside the positioning post 5, the lower end face of the sizing sleeve 8 fits against the support step 7, which can ensure the stability of the sizing sleeve 8 and prevent the sizing sleeve 8 from deviating.

[0034] In addition, for easy handling of the sizing sleeve 8, such as Figure 1 As shown, a set of handles 16 are symmetrically arranged on the outer periphery of the sizing sleeve 8, which makes it convenient to hold the handles 16 to pick up and put down the sizing sleeve 8.

[0035] In one embodiment, such as Figure 2 As shown, an I-shaped pressure transmission shaft 11 is movably installed inside the sizing sleeve 8. The pressure transmission shaft 11 can extend and retract along the axial direction of the sizing sleeve 8. Under natural conditions, the pressure transmission shaft 11 falls into the sizing sleeve 8 under the action of gravity. During the experiment, the rock core 17 to be tested is randomly placed on the pressure plate 3. After the sizing sleeve 8 is placed into the positioning column 5, the rock core 17 to be tested will push the sizing sleeve 8 upward out of the sizing sleeve 8. When the pressure application component is in contact with the pressure transmission shaft 11 to apply pressure, the pressure can be transmitted to the rock core 17 to be tested using the movable pressure transmission shaft 11.

[0036] In this embodiment, as Figure 1 As shown, the test platform 1 has four columns 12 at its four corners. The columns 12 are integrally formed with the test platform 1. The top of the columns 12 is a top plate 15, which is integrally formed with the columns 12. The top plate 15 has a pressure-applying component in the center. The pressure-applying component is used to apply pressure to the pressure transmission shaft 11 and transmit the pressure to the rock core 17 to be tested through the pressure transmission shaft 11.

[0037] In one embodiment, the pressure application assembly includes an automatic telescopic cylinder 13 and a pressure block 14. The automatic telescopic cylinder 13 can be a pneumatic cylinder or a hydraulic cylinder. The automatic telescopic cylinder is fixedly installed at the center of the top plate 15 by bolts, and the pressure block 14 is fixed to the output end of the automatic telescopic cylinder 13. The automatic telescopic cylinder is coaxial with the sizing sleeve 8.

[0038] In summary, the rock mechanics performance testing device provided by the embodiment of the application has the following use method:

[0039] Firstly, the to-be-tested rock core 17 is randomly placed on the pressure bearing plate 3, and then the sizing sleeve 8 is placed inside the positioning column 5, the axial positioning of the sizing sleeve 8 is completed by cooperation of the first inclined surface 6 and the second inclined surface 9, and then the to-be-tested rock core 17 is gradually surrounded and extruded by the gradually decreasing inner diameter of the sizing sleeve 8, so that the to-be-tested rock core 17 is self-adaptively adjusted to be coaxial with the sizing sleeve 8, thereby completing the positioning of the to-be-tested rock core 17. After the sizing sleeve 8 is placed inside the positioning column 5, the to-be-tested rock core 17 pushes the transmission shaft 11 out of the sizing sleeve 8 upwards, the pressure block 14 is driven by the automatic telescopic cylinder to move downwards to contact the transmission shaft 11 and apply pressure to the transmission shaft 11, the transmission shaft 11 transmits the force to the to-be-tested rock core 17, the to-be-tested rock core 17 is pressed, and the pressure sensor 2 detects the pressure value of the pressure. Based on the pressure of the pressure sensor 2 and the displacement of the automatic telescopic cylinder, the rock mechanics performance of the rock core sample can be determined.

[0040] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A rock mechanical property testing device, characterized by, The utility model relates to a pressure testing device, which comprises: a testing table, which is centrally provided with a pressure detection unit, and is circumferentially provided with a plurality of positioning columns around the pressure detection unit, and the ends of the positioning columns away from the pressure detection unit are provided with first inclined surfaces gradually expanding outward along the radial direction of the positioning columns; a diameter setting sleeve, which is arranged between the positioning columns and is designed in a split type with the positioning columns, and the outer periphery of the diameter setting sleeve is provided with second inclined surfaces matched with the first inclined surfaces, and the inner periphery of the diameter setting sleeve is provided with third inclined surfaces gradually converging inward from the end close to the detection unit to the end away from the detection unit along the radial direction of the diameter setting sleeve.

2. The rock mechanical property testing device according to claim 1, wherein A I-shaped pressure transmission shaft is movably arranged in the diameter setting sleeve, and the pressure transmission shaft can be axially extended and retracted.

3. The rock mechanical property testing device according to claim 1, wherein The end of the first inclined surface close to the pressure detection unit is provided with a support step for supporting the diameter setting sleeve.

4. The rock mechanical property testing apparatus of claim 1, wherein The outer periphery of the diameter setting sleeve is provided with a handle.

5. The rock mechanical property testing apparatus of claim 1, wherein The detection unit comprises a pressure sensor and a pressure receiving plate, the pressure sensor is mounted on the testing table, the pressure receiving plate is fixed to the pressure sensor, and the pressure sensor is connected to a data acquisition unit through a data line.

6. The rock mechanical property testing device according to claim 5, wherein The testing table is centrally provided with a slot hole, the pressure sensor is mounted in the slot hole and exposed from the slot hole.

7. The rock mechanical property testing apparatus of claim 5, wherein The testing table is internally provided with a wiring slot for arranging the data line.

8. The rock mechanical property testing apparatus of claim 1, wherein, The testing table is provided with a stand, the top end of the stand is provided with a top plate, and the top plate is centrally provided with a pressure applying assembly.

9. The rock mechanical property testing apparatus of claim 8, wherein, The pressure applying assembly comprises an automatic telescopic cylinder and a pressing block, the automatic telescopic cylinder is fixed to the top plate, and the pressing block is fixed to the output end of the automatic telescopic cylinder.

10. The rock mechanical property testing apparatus of claim 9, wherein, The automatic telescopic cylinder is coaxial with the diameter setting sleeve.

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