CT (Computed Tomography) real-time scanning multifunctional test device

Abstract

The invention discloses a CT (Computed Tomography) real-time scanning multifunctional test device, which comprises a fixed frame, a first track, a first movable frame, a second movable frame, a triaxial experiment assembly, a shearing assembly, a second track, a third track and at least three groups of CT scanning pieces, the first moving frame and the second moving frame are movably arranged on the first track, the triaxial experiment assembly is arranged on the first moving frame, the shearing assembly is arranged on the second moving frame, and the CT scanning piece is used for scanning a rock sample. Various mechanical experiments can be carried out, 4D scanning is carried out on a rock sample in a multi-source and multi-probe mode, and internal damage changes of rock in the loading process can be captured in real time through a CT scanning piece. By accurately controlling the loading and scanning processes, more accurate data can be obtained, intuitive microscopic information is provided for research of rock damage mechanical properties, and integration of multiple functions of a single device is realized.

Description

Technical Field

[0001] The invention relates to the technical field of rock mechanics test devices, and in particular to a CT real-time scanning multifunctional test device. Background Art

[0002] With the widespread application of rock mechanics in the engineering field, the study of rock mesoscopic damage mechanical properties has become particularly important. As a non-destructive test detection method, CT real-time scanning technology has played a key role in the experimental study of rock mesoscopic damage mechanical properties. However, the existing experimental equipment has certain limitations in simulating the high geothermal environment, seepage effects, and realizing multifunctional loading encountered in actual engineering.

[0003] The loading device in the related technology has a single function and cannot be effectively matched with the CT real-time scanning technology, which limits the versatility of the experiment. In addition, it is difficult to accurately simulate the high temperature environment and seepage effects in actual engineering, especially the high temperature conditions of rocks in scenarios such as deep underground mining. The heating method is not stable enough and cannot maintain the accurate target temperature for a long time, resulting in deviations between the experimental results and the actual situation. At the same time, the flow or pressure control is not precise enough to ensure the uniformity of the seepage process inside the sample. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a CT real-time scanning multifunctional testing device.

[0006] The CT real-time scanning multifunctional test device of the embodiment of the present invention comprises a fixed frame, a first track, a first movable frame, a second movable frame, a triaxial test assembly, a shear assembly, a second track, a third track and at least three groups of CT scanning parts, wherein a stress loading assembly is provided on the top of the fixed frame, and the stress loading assembly is used to provide the stress required for the test downward; the first track is located below the stress loading assembly and extends along the first horizontal direction; the first movable frame and the second movable frame can be movably arranged on the first track; the triaxial test assembly is arranged on the first movable frame, and is used to perform a triaxial compression test on the rock sample; the shear assembly is arranged on the second movable frame, and is used to perform a shear test on the rock sample; the second track and the third track are relatively arranged on both sides of the fixed frame along the second horizontal direction, wherein the first horizontal direction is perpendicular to the second horizontal direction; the CT scanning part comprises an X-ray source and a detector, and the X-ray source and the detector are movably arranged on the second track and the third track respectively, and the CT scanning part is used to scan the rock sample.

[0007] In some embodiments, the second track includes a first straight line segment and a first arc segment, the third track includes a second straight line segment and a second arc segment, the first arc segment and the second arc segment are arranged on both sides of the fixed frame relatively along the second horizontal direction, and the openings of the first arc segment and the second arc segment are both arranged toward the fixed frame, and the X-ray source and the detector are respectively arranged on the first arc segment and the second arc segment.

[0008] In some embodiments, the stress loading assembly includes an electric cylinder and a jack, the electric cylinder is connected to the fixing frame, the jack is connected to the electric cylinder, the electric cylinder is used to adjust the position of the jack in the vertical direction, and the jack is used to provide downward stress.

[0009] In some embodiments, the triaxial test assembly includes a temperature and pressure chamber, a sample chamber and a seepage assembly, wherein the temperature and pressure chamber is used to provide the sample chamber with the temperature and pressure required for the test, the sample chamber is used to place rock samples, and the seepage assembly is connected to the sample chamber to provide seepage fluid to the sample placed in the sample chamber.

[0010] In some embodiments, the CT real-time scanning multifunctional test device of the embodiment of the present invention also includes a heating component, which includes a working fluid storage tank, a heater, a working fluid pump, a liquid inlet pipe and a liquid outlet pipe. The heater is arranged in the working fluid storage tank for heating the heat exchange working fluid. The working fluid pump is arranged in the working fluid storage tank and is connected to the temperature and pressure chamber through the liquid inlet pipe and the liquid outlet pipe.

[0011] In some embodiments, a first pad and a second pad are provided between the top and the bottom of the sample chamber, the first pad is movably connected to the sample chamber, and the second pad is fixedly connected to the sample chamber, and the first pad is used to bear the stress applied by the stress loading assembly so as to cooperate with the second pad to extrude the rock sample in the vertical direction.

[0012] In some embodiments, the seepage assembly includes a first seepage plate, a second seepage plate, a water inlet pipe, a water outlet pipe, a water pump and a liquid storage tank. The first seepage plate is connected to the first pad and is located below the first pad, the second seepage plate is connected to the second pad and is arranged above the second pad, the water pump is arranged in the liquid storage tank, the water pump is connected to the first seepage plate through the water inlet pipe, the second seepage plate is connected to the liquid storage tank through the water outlet pipe, the liquid storage tank is used to provide seepage fluid to the rock sample, and the water inlet pipe is provided with a seepage pressure servo control system.

[0013] In some embodiments, an insulation layer is provided on the side wall of the temperature and pressure chamber, and a circulating water cooling system is provided in the insulation layer; and / or a pressure sensor and a first displacement sensor are provided on the top of the temperature and pressure chamber, the pressure sensor is used to detect the pressure of the jack, and the first displacement sensor is used to detect the displacement of the jack in the vertical direction.

[0014] In some embodiments, the shearing assembly includes a movable base, which is movably disposed on the first movable frame, and the movable base is provided with a top shearing box and a bottom shearing box which are relatively arranged in the up and down directions, and the bottom shearing box is fixedly connected to the movable base, and the first movable frame is provided with a push rod and a push rod, and the push rod and the push rod are relatively arranged, the push rod is used to push the bottom shearing box, and the push rod is stopped on the top shearing box, and the first movable frame is provided with a pressure rod, and the pressure rod is movably connected to the first movable frame for pressing the top shearing box downward.

[0015] In some embodiments, a second displacement sensor is disposed on the first moving frame, and the second displacement sensor is used to detect the displacement of the moving base.

[0016] The CT real-time scanning multifunctional test device of the embodiment of the present invention can perform a variety of mechanical experiments, and adopts a multi-source multi-detection method to perform 4D scanning on rock samples. The CT scan can capture the internal damage changes of the rock during the loading process in real time. By precisely controlling the loading and scanning process, more accurate data can be obtained, providing intuitive microscopic information for the study of rock damage mechanical properties, and realizing the integration of multiple functions of a single device. At the same time, the device can also perform multiple experiments continuously, reducing the time for experimental preparation and conversion, and improving experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a CT real-time scanning multifunctional testing device according to an embodiment of the present invention.

[0018] Figure 2 It is a top view of the CT real-time scanning multifunctional testing device according to an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of the structure of the temperature and pressure chamber of an embodiment of the present invention.

[0020] Figure 4 Schematic diagram of the structure of the shearing assembly according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] 100. CT real-time scanning multifunctional test device; 200. Rock sample; 1. Fixed frame; 2. Stress loading assembly; 201. Electric cylinder; 202. Jack; 3. First track; 4. First mobile frame; 5. Second mobile frame; 6. Triaxial test assembly; 601. Temperature and pressure chamber; 602. Sample chamber; 603. Seepage assembly; 6031. First seepage plate; 6032. Second seepage plate; 6033. Water inlet pipe; 6034. Water outlet pipe; 6035. Water pump; 6036. Liquid storage tank; 7. Shear assembly; 701. Mobile base; 702. Top shear box; 703. Bottom shear box; 704. Push rod ; 705, push rod; 706, pressure rod; 8, second track; 801, first straight segment; 802, first arc segment; 9, third track; 901, second straight segment; 902, second arc segment; 10, CT scan piece; 1001, X-ray source; 1002, detector; 11, heating assembly; 1101, working fluid tank; 1102, heater; 1103, working fluid pump; 1104, liquid inlet pipe; 1105, liquid outlet pipe; 12, first cushion block; 13, second cushion block; 14, insulation layer; 15, circulating water cooling system; 16, pressure sensor; 17, first displacement sensor; 18, second displacement sensor. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] like Figures 1 to 4 As shown, the CT real-time scanning multifunctional testing device 100 of the embodiment of the present invention includes a fixed frame 1, a first track 3, a first movable frame 4, a second movable frame 5, a triaxial test assembly 6, a shear assembly 7, a second track 8, a third track 9 and at least three groups of CT scanning parts 10. A stress loading assembly 2 is provided on the top of the fixed frame 1, and the stress loading assembly 2 is used to provide the stress required for the test downward. The first track 3 is located below the stress loading assembly 2 and extends along the first horizontal direction, and the first movable frame 4 and the second movable frame 5 can be movably arranged on the first track 3. The triaxial test assembly 6 is arranged on the first movable frame 4, and is used to perform a triaxial compression test on the rock sample 200. The shear assembly 7 is arranged on the second movable frame 4, and is used to perform a shear test on the rock sample 200. The second track 8 and the third track 9 are relatively arranged on both sides of the fixed frame 1 along the second horizontal direction, as shown in FIG. Figure 1 and Figure 2As shown, the first horizontal direction is perpendicular to the second horizontal direction. The CT scanner 10 includes an X-ray source 1001 and a detector 1002, which are movably arranged on the second track 8 and the third track 9, respectively. The CT scanner 10 is used to scan the rock sample 200 to observe the damage and crack development inside the rock.

[0025] The CT real-time scanning multifunctional test device 100 of the embodiment of the present invention adopts a multi-source multi-detector design, with at least three relative X-ray sources 1001 and detectors 1002. For example, when performing a uniaxial test or a shear test, a single source and a single detector can be used for scanning. When performing a triaxial test, a three-source and three-detector method can be used for scanning.

[0026] Specifically, when the CT real-time scanning multifunctional test device 100 of the embodiment of the present invention is used, when a uniaxial or triaxial test is performed, the rock is prepared into a cylindrical sample of 50 mm×100 mm (diameter×height) and placed in the triaxial test assembly 6, and the surface of the rock sample 200 is polished smooth, and the first moving frame 4 is moved to the bottom of the stress loading assembly 2, so that the stress loading assembly 2 provides downward the stress required for the test of the triaxial test assembly 6. Then, the CT scanning part 10 is used to scan the rock sample 200 to observe the damage and crack development inside the rock.

[0027] When the shear test is performed, the rock is prepared into a rock sample 200 of 50 mm×50 mm×100 mm (length×width×height) and placed on the shear assembly 7, and the first moving frame 4 is moved out from under the stress loading assembly 2, and the shear assembly 7 is moved to under the stress loading assembly 2, so that the stress loading assembly 2 provides downward the stress required for the test of the shear assembly 7. Then, the CT scanning part 10 is used to scan the rock sample 200 to observe the damage and crack development inside the rock.

[0028] Therefore, the CT real-time scanning multifunctional testing device 100 of the embodiment of the present invention can perform a variety of mechanical experiments, and use a multi-source multi-detection method to perform 4D scanning on rock samples. The CT scanning device 10 can capture the internal damage changes of the rock during the loading process in real time. By precisely controlling the loading and scanning process, more accurate data can be obtained, providing intuitive microscopic information for the study of rock damage mechanical properties, and realizing the integration of multiple functions of a single device. At the same time, the device can also perform multiple experiments continuously, reducing the time for experimental preparation and conversion, and improving experimental efficiency.

[0029] In some embodiments, the second track 8 includes a first straight segment 801 and a first arc segment 802, and the third track 9 includes a second straight segment 901 and a second arc segment 902. The first arc segment 802 and the second arc segment 902 are arranged on both sides of the fixing frame 1 along the second horizontal direction, and the openings of the first arc segment 802 and the second arc segment 902 are both arranged toward the fixing frame 1, and the X-ray source 1001 and the detector 1002 are respectively arranged on the first arc segment 802 and the second arc segment 902.

[0030] like Figure 2 As shown, since the first arc segment 802 and the second arc segment 902 are arranged on both sides of the fixing frame 1 along the second horizontal direction, and the openings of both are arranged toward the fixing frame 1, the X-ray source 1001 and the detector 1002 can realize 360-degree rotation scanning around the rock sample 200 through the arc segment on the basis of linear motion, thereby obtaining all-round information of the internal structure of the rock sample 200 and realizing all-round and multi-angle internal structure observation. All-round scanning can improve the quality of CT images and make the damage features such as cracks and holes inside the rock clearer.

[0031] In some embodiments, the stress loading assembly 2 includes an electric cylinder 201 and a jack 202, the electric cylinder 201 is connected to the fixing frame 1, the jack 202 is connected to the electric cylinder 201, the electric cylinder 201 is used to adjust the vertical position of the jack 202, and the jack 202 is used to provide downward stress.

[0032] like Figure 1 As shown, the electric cylinder 201 adjusts the position of the jack 202 in the vertical direction to ensure that the top of the jack 202 accurately contacts the rock sample 200. The jack 202 extends downward to apply stress to the rock sample, simulating the vertical pressure that the rock is subjected to in actual engineering. The electric cylinder 201 can provide precise position control to ensure that the position of the jack 202 can accurately meet the experimental requirements. By adjusting the position of the jack 202 by the electric cylinder 201, the magnitude of the stress can be flexibly adjusted to adapt to different experimental conditions. The electric cylinder 201 can usually be integrated with a computer control system to realize an automated stress loading process and improve the intelligence level of the experiment. The combination of the electric cylinder 201 and the jack 202 can provide a stable force output to ensure the repeatability of the experimental results. This combination can adapt to different experimental requirements, such as different loading rates and different loading stages.

[0033] In some embodiments, the triaxial test assembly 6 includes a temperature and pressure chamber 601, a sample chamber 602 and a seepage assembly 603. The temperature and pressure chamber 601 is used to provide the sample chamber 602 with the temperature and pressure required for the test, the sample chamber 602 is used to place the rock sample 200, and the seepage assembly 603 is connected to the sample chamber 602 to provide seepage fluid to the sample placed in the sample chamber 602.

[0034] The temperature and pressure chamber 601 is an environmental chamber used to control and maintain the temperature and pressure required for the experiment, which can simulate the high temperature and high pressure environment that rocks encounter in actual engineering. The sample chamber 602 is a space for placing rock samples 200, which is connected to the temperature and pressure chamber 601 and can ensure that the samples are in a predetermined temperature and pressure environment during the experiment. The seepage component 603 is connected to the sample chamber 602 and is used to provide seepage fluid to the rock sample 200 inside the sample chamber 602, simulating the fluid pressure and flow conditions that rocks are subjected to in actual engineering.

[0035] The triaxial test assembly 6 can simulate multiple environmental factors such as temperature, pressure and seepage at the same time, making the experimental results closer to the actual engineering situation. By precisely controlling the experimental conditions, the experimental errors can be reduced and the reliability and repeatability of the experimental results can be improved. The assembly integrates multiple experimental functions and can complete a variety of different experiments on the same device, thereby improving the experimental efficiency. The design of the seepage assembly 603 allows the pressure and flow rate of the fluid to be adjusted to simulate different seepage conditions, increasing the flexibility of the experiment. Combined with CT real-time scanning technology, the damage inside the rock and the flow of the fluid can be monitored in real time during the experiment, providing richer microscopic damage information. Compared with separate temperature, pressure and seepage experiments, the assembly can complete the simulation of multiple conditions in one experiment, saving experimental resources.

[0036] Optionally, the temperature and pressure chamber 601 is composed of two materials. For example, the upper and lower parts of the temperature and pressure chamber 601 are made of aluminum alloy materials with good thermal conductivity, high strength and low density, and the middle part of the temperature and pressure chamber 601 is made of PEEK material with poor thermal conductivity, high strength and good X-ray penetration performance. On the one hand, the X-ray penetration performance of the temperature and pressure chamber 601 is improved, and the heat loss of the temperature and pressure chamber 601 is reduced, thereby improving the temperature control accuracy. On the other hand, while meeting the strength of the temperature and pressure chamber 601, the heat conduction efficiency between the coolant and the interior of the temperature and pressure chamber 601 is guaranteed, and the internal temperature of the temperature and pressure chamber 601 is maintained stable.

[0037] In some embodiments, the CT real-time scanning multifunctional test device 100 of the embodiment of the present invention further includes a heating component 11, and the heating component 11 includes a working fluid tank 1101, a heater 1102, a working fluid pump 1103, a liquid inlet pipe 1104, and a liquid outlet pipe 1105. The heater 1102 is disposed in the working fluid tank 1101 for heating the heat exchange working fluid, and the working fluid pump 1103 is disposed in the working fluid tank 1101 and is connected to the temperature and pressure chamber 601 through the liquid inlet pipe 1104 and the liquid outlet pipe 1105.

[0038] like Figure 3 As shown, the working fluid storage tank 1101 is used to store heat exchange working fluid, such as water, oil or other heat transfer media. The heater 1102 is installed in the working fluid storage tank 1101, and is used to heat the heat exchange working fluid stored therein to increase its temperature. The working fluid pump 1103 is also located in the working fluid storage tank 1101, and is connected to the temperature and pressure chamber 601 through the liquid inlet pipe 1104 and the liquid outlet pipe 1105. The function is to circulate the working fluid to ensure the uniform distribution of the temperature in the temperature and pressure chamber 601. The liquid inlet pipe 1104 and the liquid outlet pipe 110 connect the working fluid storage tank 1101 and the temperature and pressure chamber 601, and are used to transport the heated working fluid to the temperature and pressure chamber 601, and return the cooled working fluid to the storage tank.

[0039] Specifically, the heater 1102 heats the working fluid through electric energy or other energy sources to reach the required temperature. After the working fluid pump 1103 is started, the heated working fluid pump 1103 is sent to the temperature and pressure chamber 601, and the working fluid circulates in the temperature and pressure chamber 601, thereby heating the area where the rock sample 200 is located. By controlling the power of the heater 1102 and the flow rate of the working fluid pump 1103, the temperature in the temperature and pressure chamber 601 can be accurately controlled. In the rock mechanics experiment, the heating component 11 can simulate the high temperature environment faced by rocks in actual projects such as deep underground mining. By accurately controlling the temperature, it can be ensured that the experimental results can reflect the mechanical behavior of rocks under high temperature conditions. Since the heating component 11 can accurately control the temperature, the influence of temperature fluctuations on the experimental results is reduced, and the accuracy of the experiment is improved. The maximum temperature in the temperature and pressure chamber 601 of the CT real-time scanning multifunctional test device 100 of the embodiment of the present invention can reach 300°C, and the maximum confining pressure can reach 150Mpa.

[0040] In some embodiments, a first cushion block 12 and a second cushion block 13 are provided between the top and the bottom of the sample chamber 602, the first cushion block 12 is movably connected to the sample chamber 602, and the second cushion block 13 is fixedly connected to the sample chamber 602. The first cushion block 12 is used to bear the stress applied by the stress loading assembly 2, so as to cooperate with the second cushion block 13 to squeeze the rock sample 200 in the vertical direction.

[0041] like Figure 3As shown, the first pad 12 is connected to the movable part of the sample chamber 602 and can be moved or adjusted during the experiment. The second pad 13 is connected to the fixed part of the sample chamber 602 and is usually fixed.

[0042] When the stress loading assembly 2 applies stress, the first pad 12 will bear this part of the stress. Since the first pad 12 is connected to the movable part of the sample chamber 602, and the second pad 13 is connected to the fixed part, the two form a pair of extrusion surfaces in the vertical direction. When stress is transmitted through the first pad 12, it will cooperate with the second pad 13 to apply uniform pressure to the rock sample 200, which helps to evenly transfer stress to the rock sample 200, avoid the problem of stress concentration, and thus improve the accuracy of the experimental results. The mobility of the first pad 12 allows fine-tuning before the experiment to ensure the uniformity of stress loading and the accuracy of the experiment. By adjusting the position of the first pad 12, rock samples 200 of different sizes and shapes can be accommodated, increasing the flexibility of the experiment.

[0043] In some embodiments, the seepage assembly 603 includes a first seepage plate 6031, a second seepage plate 6032, a water inlet pipe 6033, a water outlet pipe 6034, a water pump 6035 and a liquid storage tank 6036. The first seepage plate 6031 is connected to the first cushion block 12 and is located below the first cushion block 12, and the second seepage plate 6032 is connected to the second cushion block 13 and is located above the second cushion block 13. The water pump 6035 is disposed in the liquid storage tank 6036, and the water pump 6035 is connected to the first seepage plate 6031 through the water inlet pipe 6033, and the second seepage plate 6032 is connected to the liquid storage tank 6036 through the water outlet pipe 6034. The liquid storage tank 6036 is used to provide seepage fluid to the rock sample 200, and the water inlet pipe 6033 is provided with a seepage pressure servo control system.

[0044] Specifically, Figure 3 As shown, when the seepage assembly 603 is working, the water pump 6035 transports the seepage fluid in the liquid storage tank 6036 to the first seepage plate 6031 through the water inlet pipe 6033, and the seepage fluid flows in the rock sample 200, and then is discharged to the water outlet pipe 6034 through the second seepage plate 6032, and returns to the liquid storage tank 6036, forming a cycle. The seepage pressure servo control system accurately controls the pressure of the seepage fluid by adjusting the valve or other control devices on the water inlet pipe 6033 to simulate the actual pressure of groundwater. By controlling the speed of the water pump 6035 or the opening degree of the water pump 6035, the flow rate of the seepage fluid can be adjusted to simulate the actual flow of groundwater.

[0045] The seepage component 603 can simulate the seepage pressure and flow conditions that the rock sample 200 may encounter in actual engineering, providing an experimental basis for studying the seepage characteristics and mechanical behavior of rocks. The seepage pressure servo control system can accurately control the seepage pressure, which is very important for studying the mechanical response of rocks under different seepage pressures. By accurately controlling the seepage parameters, the experimental error can be reduced and the accuracy and reliability of the experimental results can be improved. The design of the seepage component 603 allows the type and properties of the seepage fluid to be changed to simulate different seepage environments, increasing the flexibility and versatility of the experiment. Combined with CT real-time scanning technology, the seepage conditions and damage development inside the rock sample 200 can be monitored in real time during the experiment, providing richer microscopic damage information.

[0046] In some embodiments, a heat-insulating layer 14 is disposed on the side wall of the temperature-pressure chamber 601 , and a circulating water cooling system 15 is disposed in the heat-insulating layer 14 .

[0047] The insulation layer 14 is located on the side wall of the temperature-pressure chamber 601, and its function is to reduce the loss of heat to the experimental environment, so as to maintain the temperature stability in the temperature-pressure chamber 601. The circulating water cooling system 15 is installed in the insulation layer 14, and is used to adjust and maintain the temperature in the temperature-pressure chamber 601 through water circulation. The circulating water cooling system 15 adjusts the temperature in the temperature-pressure chamber 601 through water circulation. The cooling water can absorb the heat in the temperature-pressure chamber 601 to reduce its temperature; the heating water can transfer the heat back to the temperature-pressure chamber 601 to increase its temperature. By adjusting the flow rate and temperature of the cooling water or the heating water, the temperature in the temperature-pressure chamber 601 can be accurately controlled to meet the temperature requirements of different experiments. The combined use of the insulation layer 14 and the circulating water cooling system 15 can significantly improve the temperature stability of the temperature-pressure chamber 601 and reduce temperature fluctuations.

[0048] In some embodiments, a pressure sensor 16 and a first displacement sensor 17 are provided on the top of the temperature and pressure chamber 601 . The pressure sensor 16 is used to detect the pressure of the jack 202 , and the first displacement sensor 17 is used to detect the displacement of the jack 202 in the vertical direction.

[0049] The CT real-time scanning multifunctional test device 100 of the embodiment of the present invention can monitor the pressure and displacement of the jack 202 at any time through the real-time monitoring of the pressure sensor 16 and the first displacement sensor 17, so that the experimenter can ensure the real-time monitoring of the experimental process. Accurate pressure and displacement data are essential for analyzing the mechanical response of rocks, and the use of these sensors can improve the accuracy of the data. Real-time monitoring data helps experimenters make decisions quickly, optimize experimental parameters, and improve experimental efficiency. The collected pressure and displacement data can be used for subsequent experimental data analysis to help researchers understand the mechanical behavior of rocks more deeply.

[0050] In some embodiments, the shearing assembly 7 includes a mobile base 701, which is movably arranged on the first mobile frame 4, and is provided with a top shearing box 702 and a bottom shearing box 703 which are arranged opposite to each other in the up-down direction on the mobile base 701, and the bottom shearing box 703 is fixedly connected to the mobile base 701. A push rod 704 and a push rod 705 are provided on the first mobile frame 4, and the push rod 704 and the push rod 705 are arranged opposite to each other, and the push rod 704 is used to push the bottom shearing box 703, and the push rod 705 is stopped on the top shearing box 702. The first mobile frame 4 is provided with a pressing rod 706, which is movably connected to the first mobile frame 4 and is used to press the top shearing box 702 downward.

[0051] Specifically, Figure 4 As shown, the stress loading assembly 2 applies pressure downward to the pressure rod 706, and the pressure rod 706 acts on the top shear box 702 after being stressed. After the stress of the top shear box 702 is loaded to a preset value, the stress is kept unchanged, and then the bottom shear box 703 is pushed by the push rod 704. Since the push rod 705 stops on the top shear box 702, the top shear box 702 and the bottom shear box 703 are misaligned, thereby achieving shearing of the geotechnical sample 200. Optionally, the shear rate is 0.001mm / s-1mm / s.

[0052] In some embodiments, a second displacement sensor 18 is disposed on the first mobile frame 4 , and the second displacement sensor 18 is used to detect the displacement of the mobile base 701 .

[0053] In the shear experiment, the data from the second displacement sensor 18 can help researchers analyze the deformation of rocks or materials during the shear process. The displacement data combined with the data provided by the pressure sensor 16 and the second displacement sensor 18 can be used to more comprehensively analyze the stress distribution in the experiment. Through the analysis of the displacement data, the experimental design and parameter settings can be optimized to improve the efficiency and effect of the experiment.

[0054] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A CT real-time scanning multifunctional test device, characterized in that: include: A fixing frame, wherein a stress loading component is provided on the top of the fixing frame, and the stress loading component is used to provide the stress required for the test downward; A first track, the first track is located below the stress loading assembly and extends along a first horizontal direction; A first mobile frame and a second mobile frame, wherein the first mobile frame and the second mobile frame are both movably disposed on the first track; A triaxial test assembly, the triaxial test assembly being arranged on the first mobile frame and being used for performing a triaxial compression test on the rock sample; a shearing assembly, the shearing assembly being arranged on the second mobile frame and being used for performing a shear test on the rock sample; A second track and a third track, wherein the second track and the third track are arranged on two sides of the fixing frame opposite to each other along a second horizontal direction, wherein the first horizontal direction is perpendicular to the second horizontal direction; At least three groups of CT scanning parts, the CT scanning parts include an X-ray source and a detector, the X-ray source and the detector are movably arranged on the second track and the third track respectively, and the CT scanning parts are used to scan rock samples.

2. The CT real-time scanning multifunctional test device according to claim 1, characterized in that: The second track includes a first straight segment and a first arc segment, the third track includes a second straight segment and a second arc segment, the first arc segment and the second arc segment are arranged on both sides of the fixed frame relatively along the second horizontal direction, and the openings of the first arc segment and the second arc segment are both arranged toward the fixed frame, and the X-ray source and the detector are respectively arranged on the first arc segment and the second arc segment.

3. The CT real-time scanning multifunctional test device according to claim 1, characterized in that: The stress loading assembly includes an electric cylinder and a jack, wherein the electric cylinder is connected to the fixing frame, and the jack is connected to the electric cylinder. The electric cylinder is used to adjust the position of the jack in the vertical direction, and the jack is used to provide downward stress.

4. The CT real-time scanning multifunctional test device according to claim 3, characterized in that: The triaxial test assembly includes a temperature and pressure chamber, a sample chamber and a seepage assembly. The temperature and pressure chamber is used to provide the sample chamber with the temperature and pressure required for the test. The sample chamber is used to place rock samples. The seepage assembly is connected to the sample chamber to provide seepage fluid to the sample placed in the sample chamber.

5. The CT real-time scanning multifunctional test device according to claim 4, characterized in that: It also includes a heating component, which includes a working fluid storage tank, a heater, a working fluid pump, a liquid inlet pipe and a liquid outlet pipe. The heater is arranged in the working fluid storage tank to heat the heat exchange working fluid. The working fluid pump is arranged in the working fluid storage tank and is connected to the temperature and pressure chamber through the liquid inlet pipe and the liquid outlet pipe.

6. The CT real-time scanning multifunctional test device according to claim 4, characterized in that: A first pad and a second pad are provided between the top and the bottom of the sample chamber, the first pad is movably connected to the sample chamber, and the second pad is fixedly connected to the sample chamber, and the first pad is used to bear the stress applied by the stress loading assembly so as to cooperate with the second pad to extrude the rock sample in the vertical direction.

7. The CT real-time scanning multifunctional test device according to claim 6, characterized in that: The seepage assembly includes a first seepage plate, a second seepage plate, a water inlet pipe, a water outlet pipe, a water pump and a liquid storage tank. The first seepage plate is connected to the first pad and is located below the first pad. The second seepage plate is connected to the second pad and is arranged above the second pad. The water pump is arranged in the liquid storage tank. The water pump is connected to the first seepage plate through the water inlet pipe. The second seepage plate is connected to the liquid storage tank through the water outlet pipe. The liquid storage tank is used to provide seepage fluid to the rock sample. The water inlet pipe is provided with a seepage pressure servo control system.

8. The CT real-time scanning multifunctional test device according to claim 4, characterized in that: A heat-insulating layer is provided on the side wall of the temperature-pressure chamber, and a circulating water cooling system is provided in the heat-insulating layer; and / or A pressure sensor and a first displacement sensor are provided on the top of the temperature and pressure chamber. The pressure sensor is used to detect the pressure of the jack, and the first displacement sensor is used to detect the displacement of the jack in the vertical direction.

9. The CT real-time scanning multifunctional test device according to claim 1, characterized in that: The shearing assembly includes a movable base, which is movably arranged on the first movable frame, and the movable base is provided with a top shearing box and a bottom shearing box which are relatively arranged in the up and down directions, and the bottom shearing box is fixedly connected to the movable base, and the first movable frame is provided with a push rod and a push rod, and the push rod and the push rod are relatively arranged, the push rod is used to push the bottom shearing box, and the push rod is stopped on the top shearing box, and the first movable frame is provided with a pressure rod, and the pressure rod is movably connected to the first movable frame, and is used to press the top shearing box downward.

10. The CT real-time scanning multifunctional test device according to claim 1, characterized in that: The first moving frame is provided with a second displacement sensor, and the second displacement sensor is used to detect the displacement of the moving base.

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