Rock fracture evolution characteristic testing device

Abstract

The invention relates to the technical field of rock performance testing, and particularly discloses a rock fracture evolution characteristic testing device which comprises a rack plate, a butt clamping device is installed on the rack plate and used for clamping a rock sample, a fixing device is arranged on the outer side of the rock sample, a sliding groove is formed in the upper side of the rack plate, and a sliding block is slidably connected into the sliding groove; the fixing device is rotatably connected with the sliding block, the upper side of the rack plate is provided with a detection device, the lower side of the rack plate is provided with a pressure applying device, the upper side of the rack plate is provided with a cutting and brushing device, and the cutting and brushing device cuts off a rock sample to form two independent samples. The rock fracture evolution characteristic test device provided by the invention only clamps a rock sample once in the use process, the cut sample does not need to be clamped for the second time, the cut section can be painted in the cutting process, the sample can shake left and right in the painting process, and the test efficiency is greatly improved. Therefore, the brushing effect on the sample is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rock performance testing, and in particular to a rock fracture evolution characteristic testing device. Background Art

[0002] The evolutionary characteristics of rock fracture refer to the characteristics and laws exhibited by the gradual changes in the internal structure of the rock when it is subjected to external forces, from the initiation and expansion of tiny cracks to the final formation of macroscopic fracture surfaces.

[0003] The rock fracture evolution characteristics test is an important research method in the field of rock mechanics engineering technology. Through this test, we can deeply understand the fracture mechanism and evolution process of rocks under different mechanical conditions. During the test, core samples are first collected from the engineering site and cut into specimens. Paint is sprayed on the specimens to form an artificial random speckle field to observe the crack propagation in the future. The plate specimens are scanned by a CT scanner to obtain their internal defect characteristics. Finally, pressure is applied to the specimens to simulate the stress conditions in the actual project, and the failure characteristics and crack propagation characteristics of the deformed specimens are observed and recorded. In the prior art, the above steps are all carried out through different processes, and the specimens need to be clamped multiple times. During the clamping process, the specimens may evolve cracks in advance, resulting in inaccurate later tests. In addition, in the prior art, when applying pressure to the specimens, the specimens are usually placed directly in a press, but in this way, the specimens are not protected by the surrounding integrated rock, and their own stress is greatly reduced. In this way, the conclusions obtained during the pressurized failure test are not particularly accurate. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a rock fracture evolution characteristics test device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A rock fracture evolution characteristic test device comprises a frame plate, a clamping device is installed on the frame plate, the clamping device is used to clamp the rock sample, a fixing device is arranged on the outside of the rock sample, a slide groove is arranged on the upper side of the frame plate, a slider is slidably connected in the slide groove, the fixing device is rotatably connected to the slider, a detection device is installed on the upper side of the frame plate, a pressure device is installed on the lower side of the frame plate, the pressure device is located directly below the detection device, a cutting and painting device is installed on the upper side of the frame plate, the cutting and painting device cuts the rock sample into two independent specimens, when the rock sample is cut, the cutting and painting device paints the cross section of the specimen, the slider drives the fixing device to translate along the slide groove, the fixing device rotates to a horizontal state during the translation process, the fixing device finally stops between the detection device and the pressure device, and the rock fracture evolution characteristic is tested by the detection device and the pressure device.

[0007] Preferably, the fixing device includes a fixing ring, which is hinged to the slider via a torsion spring hinge, and is rotatably connected to a rotating ring inside the fixing ring, to which a plurality of first hydraulic cylinders are fixedly connected, and the telescopic end of each first hydraulic cylinder is fixedly connected to an arc plate, so that the rock sample is wrapped and fixed by the plurality of arc plates.

[0008] Preferably, the clamping device includes two clamping assemblies, each clamping assembly includes a column, a sliding hole is provided on one side of the column, the sliding hole is slidably connected to the first barrel body, the first barrel body is slidably connected to the second barrel body, the second barrel body is equipped with a second hydraulic cylinder, the telescopic end of the second hydraulic cylinder is fixedly connected to the clamping plate, a spring is fixedly connected between the inner bottom of the first barrel body and the outer bottom of the second barrel body, and an adjusting screw is provided at the bottom of the first barrel body.

[0009] Preferably, one end of the adjusting screw is fixedly connected to a hand wheel.

[0010] Preferably, the cutting and painting device includes a vertical pole, a guide groove is provided on one side of the vertical pole, a guide block is slidably connected in the guide groove, the top of the vertical pole is fixedly connected to the third hydraulic cylinder, the telescopic end of the third hydraulic cylinder is fixed to the guide block, one side of the guide block is fixedly connected to the mounting rod, and an electric saw is installed on the lower side of the mounting rod.

[0011] Preferably, a hose is installed at the upper end of the mounting rod, and a flexible brushing cotton is wrapped on the outside of the hose. The hose is provided with a liquid outlet, and a paint can is installed on one side of the guide block, and the paint can is connected to the hose.

[0012] Preferably, the detection device comprises a bracket, the bracket is fixed on the upper side of the frame plate, one side of the bracket is fixedly connected to a pressure ring, and the upper side of the pressure ring is equipped with a ray search device.

[0013] Preferably, the pressure device comprises a fourth hydraulic cylinder, which is fixed on the lower side of the frame plate, and the telescopic end of the fourth hydraulic cylinder is fixedly connected to the extrusion plate, and the extrusion plate passes through the clearance hole of the frame plate.

[0014] Beneficial effects of the present invention: The rock fracture evolution characteristic test device provided by the present invention only clamps the rock sample once during use, and the sample does not need to be clamped again after the segmentation is completed. In addition, the cut section can be painted during the cutting process, and the sample can be shaken left and right during the painting process, thereby improving the painting effect on the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a basic structural diagram of a rock fracture evolution characteristic test device provided by the present invention;

[0016] Figure 2 It is a basic structural diagram of the cutting and painting device;

[0017] Figure 3 yes Figure 1 Working status diagram;

[0018] Figure 4 This is a basic structural diagram of the clamping device;

[0019] Figure 5 It is a basic structural diagram of the clamping assembly. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] Example 1

[0022] like Figure 1-5 As shown, a rock fracture evolution characteristic test device of this embodiment includes a frame plate 1, the lower side of the frame plate 1 is fixedly connected to the support leg 11, the frame plate 1 is equipped with a clamping device 2, the clamping device 2 is used to clamp the rock sample 9, the clamping device 2 includes two clamping components, each clamping component includes a column 21, the column 21 is fixed to the upper side of the frame plate 1, one side of the column 21 is provided with a sliding hole, the sliding hole is slidably connected to the first barrel 22, the top of the column 21 is provided with a first locking threaded hole, the first locking screw 23 is threadedly connected to the first locking threaded hole, and the first locking screw 23 can fix the first barrel 22 in the sliding hole. Such a setting can adjust the position of the first barrel 22, and after the adjustment is completed, the first barrel 22 can be locked and fixed by the first locking screw 23. The purpose of changing the position of the first barrel 22 is to be able to clamp rock samples 9 of different thicknesses. The first barrel 22 is slidably connected to the second barrel 24, and the second barrel 24 is provided with a second hydraulic cylinder 25, the telescopic end of the second hydraulic cylinder 25 is fixedly connected to the clamping plate 26, the inner bottom of the first barrel 22 and the outer bottom of the second barrel 24 are fixedly connected with a spring 27, and the bottom of the first barrel 22 is provided with an adjusting screw 28, one end of the adjusting screw 28 is fixedly connected to a hand wheel 29, when the hand wheel 29 is turned, the joint screw 28 pushes the second barrel 24 forward, so that the second barrel 24 is rigidly fixed, and the rock sample 9 can be clamped by the clamping plate 26. When the adjusting screw 28 is loosened, the second barrel 24 does not contact the adjusting screw 28, and the clamping plate is in a flexible state.

[0023] A slide groove is provided on the upper side of the frame plate 1, and a slider 12 is slidably connected in the slide groove, and a screw rod 13 is rotatably connected in the slide groove. A motor 14 is installed on one side of the frame plate 1, and the motor 14 is used to drive the screw rod 13 to rotate, so that the slider 12 slides along the slide groove. The fixing device 3 is rotatably connected to the slider 12, and a fixing device 3 is arranged on the outside of the rock sample 9. The fixing device 3 includes a fixing ring 31, and the fixing ring 31 is hinged to the slider 12 through a torsion spring hinge 30. The fixing ring 31 is rotatably connected to a rotating ring 32, and a second locking threaded hole is provided on the rotating ring 32. The second locking threaded hole is threadedly connected to a second locking screw, and the rotating ring 32 is locked and fixed by the second locking screw. The second locking screw is not drawn in the figure. A plurality of first hydraulic cylinders 33 are fixedly connected to the rotating ring 32, and the telescopic end of each first hydraulic cylinder 33 is fixedly connected to an arc plate 34, and the rock sample 9 is wrapped and fixed by the plurality of arc plates 34.

[0024] A detection device 5 is installed on the upper side of the frame plate 1, and a pressure device 6 is installed on the lower side of the frame plate 1. The pressure device 6 is located directly below the detection device 5. The detection device 5 includes a bracket 51, which is fixed on the upper side of the frame plate 1. One side of the bracket 51 is fixedly connected to a pressure ring 52. A ray search device 53 is installed on the upper side of the pressure ring 52. The ray search device 53 is a prior art and will not be described in detail here. The pressure device 6 includes a fourth hydraulic cylinder 61, which is fixed on the lower side of the frame plate 1. The telescopic end of the fourth hydraulic cylinder 61 is fixedly connected to an extrusion plate, and the extrusion plate passes through the clearance hole of the frame plate 1. A cutting and painting device 4 is installed on the upper side of the frame plate 1. The cutting and painting device 4 cuts the rock sample 9 into two independent specimens 91. The cutting and painting device 4 includes a vertical pole 41. A guide groove 42 is provided on one side of the vertical pole 41. A guide block 43 is slidably connected in the guide groove 42. The top of the vertical pole 41 is fixedly connected to a third hydraulic cylinder 44. The telescopic end of the third hydraulic cylinder 44 is fixed to the guide block 43. One side of the guide block 43 is fixedly connected to a mounting rod 45. An electric saw 46 is installed on the lower side of the mounting rod 45. The electric saw 46 is also a prior art and will not be described here. A hose 47 is installed on the upper end of the mounting rod 45. The outer side of the hose 47 is wrapped with flexible painting cotton. The hose 47 is provided with a liquid outlet. A paint can 48 is installed on one side of the guide block 43. The paint can 48 is connected to the hose 47.

[0025] When the rock sample 9 is cut, the cutting and painting device 4 paints the cross section of the sample 91, and the slider 12 drives the fixing device 3 to translate along the slide slot. The fixing device 3 rotates to a horizontal state during the translation process, and the fixing device 3 finally stops between the detection device 5 and the pressure device 6. The rock fracture evolution characteristics are tested by the detection device 5 and the pressure device 6. Specifically, when the rock sample 9 is cut, the rock sample 9 is wrapped and fixed by the fixing device 3. The fixing device 3 can fix the rock sample 9 on the one hand and wrap the rock sample 9 on the other hand. In this way, during the cutting process of the rock sample 9, the surrounding of the rock sample 9 is protected by the arc plate 34, so that the rock sample 9 is not easy to be broken during the cutting process. At the same time, after the cutting is completed, the fixing device 3 can also wrap and fix the sample 91. When cutting, the adjusting screw 28 is rotated by the hand wheel 29 so that the adjusting screw 28 is against the second barrel 24, so that the second barrel 24 is rigidly fixed, and the rock sample 9 can be clamped by the clamping plate 26. In this way, the rock sample 9 is not easy to change in displacement during the cutting process, and the cutting effect is good. After the cutting is completed, the adjusting screw 28 rotates in the opposite direction and leaves the second barrel 24, so that the second barrel 24 can slide back and forth in the first barrel, and the second barrel 24 is buffered by the spring 27. In this way, when the cut section is painted by the flexible brushing cotton wrapped on the outside of the hose 47, the second barrel 24 shakes left and right to make the sample 91 shake left and right. During the shaking process, the sample 91 can squeeze the flexible brushing cotton, thereby improving the painting effect of the section. After the cutting and painting are completed, the clamping device is released, and the motor drives the screw rod to rotate, so that the slider moves forward horizontally. During the movement of the slider, the fixing device and the sample 91 are driven to move forward. When the sample 91 leaves the clamping device 2, the fixing device and the sample 91 lose the shielding. Under the action of the torsion spring hinge 30, the fixing device and the sample 91 will flip over and rotate from the vertical state to the horizontal state, and stop when the fixing device and the sample 91 reach between the detection device 5 and the pressure device 6. The sample 91 is irradiated by the ray search device 53, and the sample 91 is pressurized from below by the pressure device 6, so as to test the rock fracture evolution characteristics.

Claims

1. A rock fracture evolution characteristics test device, characterized in that: The invention comprises a frame plate (1), the frame plate (1) is provided with a clamping device (2), the clamping device (2) is used to clamp a rock sample (9), a fixing device (3) is arranged outside the rock sample (9), a slide groove is arranged on the upper side of the frame plate (1), a slider (12) is slidably connected in the slide groove, the fixing device (3) is rotatably connected to the slider (12), a detection device (5) is arranged on the upper side of the frame plate (1), a pressure device (6) is arranged on the lower side of the frame plate (1), the pressure device (6) is located directly below the detection device (5), and the upper side of the frame plate (1) is provided with a plurality of sliders (12) and a plurality of sliders (12) are connected to the fixing device (3). A cutting and painting device (4) is provided, wherein the cutting and painting device (4) cuts the rock sample (9) into two independent samples (91). When the rock sample (9) is cut, the cutting and painting device (4) paints the cross section of the sample (91). The slider (12) drives the fixing device (3) to translate along the slide groove. The fixing device (3) rotates to a horizontal state during the translation process. The fixing device (3) finally stops between the detection device (5) and the pressure device (6). The detection device (5) and the pressure device (6) are used to test the rock fracture evolution characteristics.

2. A rock fracture evolution characteristic test device according to claim 1, characterized in that: The fixing device (3) comprises a fixing ring (31), the fixing ring (31) being hinged to the sliding block (12) via a torsion spring hinge (30), the fixing ring (31) being rotatably connected to a rotating ring (32), a plurality of first hydraulic cylinders (33) being fixedly connected to the rotating ring (32), the telescopic end of each of the first hydraulic cylinders (33) being fixedly connected to an arc plate (34), and the rock sample (9) is wrapped and fixed by the plurality of arc plates (34).

3. The rock fracture evolution characteristic test device according to claim 1, characterized in that: The clamping device (2) comprises two clamping assemblies, each of which comprises a column (21), a sliding hole being provided on one side of the column (21), a first barrel body (22) being slidably connected in the sliding hole, a second barrel body (24) being slidably connected in the first barrel body (22), a second hydraulic cylinder (25) being installed in the second barrel body (24), a telescopic end of the second hydraulic cylinder (25) being fixedly connected to a clamping plate (26), a spring (27) being fixedly connected between the inner bottom of the first barrel body (22) and the outer bottom of the second barrel body (24), and an adjusting screw (28) being provided at the bottom of the first barrel body (22).

4. A rock fracture evolution characteristic test device according to claim 3, characterized in that: One end of the adjusting screw rod (28) is fixedly connected to a hand wheel (29).

5. The rock fracture evolution characteristic test device according to claim 1, characterized in that: The cutting and painting device (4) comprises a vertical pole (41), one side of the vertical pole (41) is provided with a guide groove (42), a guide block (43) is slidably connected in the guide groove (42), the top of the vertical pole (41) is fixedly connected to a third hydraulic cylinder (44), the telescopic end of the third hydraulic cylinder (44) is fixed to the guide block (43), one side of the guide block (43) is fixedly connected to a mounting rod (45), and an electric saw (46) is installed on the lower side of the mounting rod (45).

6. A rock fracture evolution characteristic test device according to claim 5, characterized in that: A hose (47) is installed at the upper end of the mounting rod (45), and a flexible brushing cotton is wrapped on the outside of the hose (47). A liquid outlet hole is provided on each of the hoses (47). A paint can (48) is installed on one side of the guide block (43), and the paint can (48) is connected to the hose (47).

7. The rock fracture evolution characteristic test device according to claim 1, characterized in that: The detection device (5) comprises a bracket (51), the bracket (51) is fixed on the upper side of the frame plate (1), one side of the bracket (51) is fixedly connected to a pressure ring (52), and a ray search device (53) is installed on the upper side of the pressure ring (52).

8. The rock fracture evolution characteristics test device according to claim 1, characterized in that: The pressure-applying device (6) comprises a fourth hydraulic cylinder (61), the fourth hydraulic cylinder (61) being fixed to the lower side of the frame plate (1), the telescopic end of the fourth hydraulic cylinder (61) being fixedly connected to a squeezing plate, and the squeezing plate passing through a clearance hole of the frame plate (1).

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