Rock and soil testing device in laboratory

Abstract

The utility model relates to a geotechnical test device in a laboratory, which belongs to the technical field of geotechnical engineering and comprises a base, a positioning groove is arranged on the upper surface of the base, a sample cylinder is arranged in an inner cavity of the positioning groove, a positioning mechanism for quickly positioning the sample cylinder is arranged in the inner cavity of the base, and a support plate is fixed at the right end of the upper surface of the base. A bearing plate is fixed to the top of the supporting plate, and loading mechanisms for applying vertical loads to a sample are arranged at the left end and the right end of the lower surface of the bearing plate; the positioning mechanism comprises a fixing cavity, a limiting rod, two first electric push rods and two movable plates. According to the rock and soil testing device in the laboratory, through introduction of a second electric push rod and a pressure sensor, the loading precision and stability are improved, automatic data acquisition and processing are achieved, through the design of a sample cylinder of a detachable structure, filling, taking out, cleaning and maintaining work of a sample are facilitated, and the working efficiency is improved. And the flexibility and adaptability of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering, in particular to a geotechnical testing device in a laboratory. Background Art

[0002] In the field of geotechnical engineering technology, geotechnical testing equipment in the laboratory is an important tool for evaluating the mechanical properties of soil. Currently, there are many types of geotechnical testing equipment on the market, which can simulate the stress conditions of geotechnical under different conditions, thereby helping researchers understand the true performance of geotechnical.

[0003] At present, the market mainly uses high-precision sensors, automated control systems and multifunctional integrated test devices to test geotechnical materials. High-precision sensors can ensure the accuracy of test data, automated control systems can simplify the operation process, and multifunctional integrated test devices can complete multiple tests on the same equipment, thereby improving test efficiency. However, these solutions still have many shortcomings in practical applications: although high-precision sensors improve test accuracy, the cost also increases accordingly. Although automated control systems simplify operations, their flexibility and adaptability need to be improved when faced with complex and changeable test conditions. Therefore, a laboratory geotechnical test device is proposed to solve the above problems. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a laboratory geotechnical testing device with the advantages of simple operation and high flexibility. It solves the problem that although high-precision sensors improve test accuracy, the cost also increases accordingly, and although automated control systems simplify operation, their flexibility and adaptability need to be improved when faced with complex and changeable test conditions.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a laboratory geotechnical testing device, comprising a base, wherein the upper surface of the base is provided with a positioning groove, the inner cavity of the positioning groove is provided with a sample tube, the inner cavity of the base is provided with a positioning mechanism for quickly positioning the sample tube, a support plate is fixed to the right end of the upper surface of the base, a load-bearing plate is fixed to the top of the support plate, and loading mechanisms for applying a vertical load to the sample are provided at both left and right ends of the lower surface of the load-bearing plate;

[0006] The positioning mechanism includes a fixed cavity, a limiting rod, two No. 1 electric push rods, two movable plates and two clamping blocks. The fixed cavity is opened in the inner cavity of the base, the limiting rod is fixed to the bottom between the opposite sides of the left and right side walls of the inner cavity of the fixed cavity, the two No. 1 electric push rods are fixed to the top of the opposite sides of the left and right side walls of the inner cavity of the fixed cavity, the piston rod of the No. 1 electric push rod is fixed to one side of the movable plate, the movable plate is slidably connected to the limiting rod, and the two clamping blocks are fixed to the top of the opposite side of the two movable plates.

[0007] By adopting this technical solution and rationally configuring the structures and parameters of each component, it is possible to effectively reduce costs, improve practicality and flexibility, and simplify the overall structure while ensuring test accuracy.

[0008] Furthermore, the sample tube is formed by a plurality of tube segments connected by threads, a sealing gasket is provided between two of the tube segments, and a plurality of through holes are opened on the outer surface of the sample tube.

[0009] By adopting this technical solution, the detachable sample tube design facilitates the loading, removal, cleaning and maintenance of the sample, and improves the flexibility and adaptability of the device.

[0010] Furthermore, a high-precision displacement sensor is fixed to the top of the right side of the sample tube, and the high-precision displacement sensor is connected to the data acquisition card through a wire.

[0011] By adopting this technical solution, various data during the test process, such as load value, displacement, etc., can be collected and recorded in real time.

[0012] Furthermore, the two movable plates are symmetrically distributed on the left and right sides of the vertical central axis of the limiting rod, and the top of the movable plate passes through the base and extends to the upper side of the base.

[0013] By adopting this technical solution, the movement of the two movable plates can drive the movement of the two clamping blocks, thereby positioning the sample tube.

[0014] Furthermore, the clamping block is a rubber block, and guide holes that are adapted to the size of the movable plate are provided at both left and right ends of the upper surface of the base.

[0015] By adopting this technical solution, the clamping block is a rubber block, which can increase the friction between the clamping block and the sample tube.

[0016] Furthermore, the loading mechanism includes two fixed blocks, a drive motor, a screw, a movable sleeve, a No. 2 electric push rod and a pressure sensor. The two fixed blocks are fixed at the left and right ends of the lower surface of the load-bearing plate, the drive motor is fixed on the right side of the right-end fixed block, the screw is rotatably connected between the opposite sides of the two fixed blocks through a bearing, the output shaft of the drive motor passes through the right-end fixed block and extends to the left side of the right-end fixed block and is fixed to the screw, the movable sleeve is threadedly connected to the screw, the No. 2 electric push rod is fixed on the lower surface of the movable sleeve, and the pressure sensor is fixedly connected to the piston rod of the No. 2 electric push rod.

[0017] By adopting this technical solution, precise displacement control in the vertical direction can be achieved, thereby ensuring that a stable and controllable load is applied to the rock and soil, improving test efficiency, increasing loading accuracy and stability, and realizing automated data collection and processing.

[0018] Furthermore, the pressure sensor is connected to a data acquisition card via a wire.

[0019] Furthermore, a slider is fixed on the upper surface of the movable sleeve, and a slide groove is provided on the lower surface of the load-bearing plate, and the slider performs horizontal linear motion in the inner cavity of the slide groove.

[0020] By adopting this technical solution, the movement of the movable sleeve can be limited.

[0021] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0022] 1. The geotechnical testing device in this laboratory has improved the loading accuracy and stability by introducing the No. 2 electric push rod and pressure sensor, and realized automatic data acquisition and processing. The detachable sample tube design facilitates the loading, removal, cleaning and maintenance of the sample, and improves the flexibility and adaptability of the device.

[0023] 2. The geotechnical testing device in the laboratory can easily locate the position of the sample tube through the positioning mechanism, avoiding the displacement of the sample tube when the loading mechanism applies the load, preventing deviations in the test results, and the loading mechanism can achieve precise vertical displacement control, thereby ensuring that a stable and controllable load is applied to the rock and soil, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the sample tube of the utility model;

[0026] Figure 3 A schematic diagram of the positioning mechanism structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the loading mechanism structure of the utility model.

[0028] In the figure: 1. Base; 2. Positioning groove; 3. Sample tube; 4. Positioning mechanism; 41. Fixed cavity; 42. Limit rod; 43. Electric push rod No. 1; 44. Movable plate; 45. Clamping block; 5. Support plate; 6. Load-bearing plate; 7. Loading mechanism; 71. Fixed block; 72. Drive motor; 73. Screw; 74. Movable sleeve; 75. Electric push rod No. 2; 76. Pressure sensor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1 to 2 In this embodiment, a laboratory geotechnical testing device includes a base 1, a positioning groove 2 is provided on the upper surface of the base 1, a sample tube 3 is provided in the inner cavity of the positioning groove 2, and a positioning mechanism 4 for quickly positioning the sample tube 3 is provided in the inner cavity of the base 1. A support plate 5 is fixed to the right end of the upper surface of the base 1, a load-bearing plate 6 is fixed on the top of the support plate 5, and loading mechanisms 7 for applying a vertical load to the sample are provided at both left and right ends of the lower surface of the load-bearing plate 6.

[0031] In this embodiment, the sample tube 3 is composed of multiple tube segments connected by threads. The detachable structural design not only facilitates the filling and removal of rock and soil, but also facilitates the cleaning and maintenance of the sample tube 3. At the same time, by adjusting the number and combination of tube segments, it can also adapt to the testing needs of samples of different sizes and shapes, thereby improving the flexibility and adaptability of the device.

[0032] In addition, a sealing gasket is provided between the two cylinder sections to ensure the sealing of the connection. A number of through holes are provided on the outer surface of the sample cylinder 3 to facilitate drainage or exhaust during the test. A high-precision displacement sensor is fixed to the top of the right side of the sample cylinder 3. The high-precision displacement sensor is connected to the data acquisition card through a wire for real-time collection and recording of various data during the test, such as load value, displacement, etc.

[0033] See also Figure 3In order to position the sample tube 3, the positioning mechanism 4 in this embodiment includes a fixed cavity 41, a limiting rod 42, two No. 1 electric push rods 43, two movable plates 44 and two clamping blocks 45. The fixed cavity 41 is opened in the inner cavity of the base 1, the limiting rod 42 is fixed to the bottom between the left and right side walls of the fixed cavity 41 on the opposite side, the two No. 1 electric push rods 43 are fixed to the top of the left and right side walls of the fixed cavity 41 on the opposite side, the piston rod of the No. 1 electric push rod 43 is fixed to one side of the movable plate 44, and the movable plate 44 is fixed to the limiting rod 42. The rod 42 is slidably connected to fill the sample tube 3 with rock and soil, and then the two No. 1 electric push rods 43 are started. The piston rods of the two No. 1 electric push rods 43 move relative to each other, and then can push the two movable plates 44 to move relative to each other. The two clamping blocks 45 are fixed on the top of the opposite side of the two movable plates 44. At this time, the lower surfaces of the two movable plates 44 move relative to each other on the outer surface of the limit rod 42. The movement of the movable plate 44 will drive the two clamping blocks 45 to move, so that the two clamping blocks 45 move relative to each other, and the sample tube 3 can be positioned.

[0034] In this embodiment, the two movable plates 44 are symmetrically distributed on the left and right sides of the vertical central axis of the limiting rod 42. The top of the movable plate 44 passes through the base 1 and extends to the upper side of the base 1. The clamping block 45 is a rubber block. Guide holes that are adapted to the size of the movable plate 44 are provided at both ends of the upper surface of the base 1.

[0035] It should be noted that the positioning mechanism 4 can facilitate positioning of the sample tube 3 , thereby preventing the sample tube 3 from shifting when the loading mechanism 7 applies a load, thereby preventing deviation in the test results.

[0036] See also Figure 4In order to apply a stable and controllable load to the rock and soil, the loading mechanism 7 in this embodiment includes two fixed blocks 71, a drive motor 72, a screw 73, a movable sleeve 74, a second electric push rod 75 and a pressure sensor 76. The two fixed blocks 71 are fixed to the left and right ends of the lower surface of the bearing plate 6, the drive motor 72 is fixed to the right side of the right end fixed block 71, the screw 73 is rotatably connected between the opposite sides of the two fixed blocks 71 through a bearing, the output shaft of the drive motor 72 passes through the right end fixed block 71 and extends to the left side of the right end fixed block 71 and is fixed to the screw 73, and the movable sleeve 74 is threadedly connected to the screw 73. Start the drive motor 72, and the output shaft of the drive motor 72 rotates to drive the screw 73 to rotate, thereby moving the movable sleeve 74 threadedly connected to it, and the No. 2 electric push rod 75 is fixed on the lower surface of the movable sleeve 74, and the pressure sensor 76 is fixedly connected to the piston rod of the No. 2 electric push rod 75. The movement of the movable sleeve 74 drives the No. 2 electric push rod 75 and the pressure sensor 76 to move, so that the position of the No. 2 electric push rod 75 can be adjusted to achieve precise displacement control in the vertical direction. Then start the No. 2 electric push rod 75 to apply a load to the inner cavity of the sample tube 3, so that the rock and soil can be tested.

[0037] In this embodiment, the pressure sensor 76 is connected to the data acquisition card through a wire. The set pressure sensor 76 is used to monitor the load value in real time and feed it back to the data acquisition card. A slider is fixed on the upper surface of the movable sleeve 74, and a slide groove is provided on the lower surface of the load-bearing plate 6. The slider moves horizontally in the inner cavity of the slide groove.

[0038] It can be understood that the loading mechanism 7 can achieve precise displacement control in the vertical direction, thereby ensuring that a stable and controllable load is applied to the rock and soil, thereby improving the test efficiency.

[0039] The working principle of the above embodiment is:

[0040] (1) When testing rock and soil, first fill the sample tube 3 with rock and soil, then start the two No. 1 electric push rods 43, and the piston rods of the two No. 1 electric push rods 43 move relative to each other, thereby pushing the two movable plates 44 to move relative to each other. At this time, the lower surfaces of the two movable plates 44 move relative to the outer surface of the limit rod 42. The movement of the movable plates 44 will drive the two clamping blocks 45 to move, so that the two clamping blocks 45 move relative to each other, and the sample tube 3 can be positioned.

[0041] (2) Then start the drive motor 72. The output shaft of the drive motor 72 rotates to drive the screw 73 to rotate, thereby moving the movable sleeve 74 threadedly connected to it. At this time, the movable sleeve 74 can limit the movement of the movable sleeve 74 due to the setting of the slider and the slide groove, so that it can only move in a straight line. The movement of the movable sleeve 74 drives the No. 2 electric push rod 75 and the pressure sensor 76 to move, so that the position of the No. 2 electric push rod 75 can be adjusted to achieve precise displacement control in the vertical direction. Then start the No. 2 electric push rod 75 to apply a load to the inner cavity of the sample tube 3, so that the rock and soil can be tested. The pressure sensor 76 is used to monitor the load value in real time and feed it back to the data acquisition card.

Claims

1. A laboratory geotechnical testing device, comprising a base (1), characterized in that: The upper surface of the base (1) is provided with a positioning groove (2), the inner cavity of the positioning groove (2) is provided with a sample tube (3), the inner cavity of the base (1) is provided with a positioning mechanism (4) for quickly positioning the sample tube (3), a support plate (5) is fixed to the right end of the upper surface of the base (1), a load-bearing plate (6) is fixed to the top of the support plate (5), and loading mechanisms (7) for applying a vertical load to the sample are provided at both left and right ends of the lower surface of the load-bearing plate (6); The positioning mechanism (4) includes a fixed cavity (41), a limiting rod (42), two No. 1 electric push rods (43), two movable plates (44) and two clamping blocks (45), wherein the fixed cavity (41) is opened in the inner cavity of the base (1), the limiting rod (42) is fixed to the bottom between the left and right side walls of the inner cavity of the fixed cavity (41), the two No. 1 electric push rods (43) are fixed to the top of the left and right side walls of the inner cavity of the fixed cavity (41), the piston rod of the No. 1 electric push rod (43) is fixed to one side of the movable plate (44), the movable plate (44) is slidably connected to the limiting rod (42), and the two clamping blocks (45) are fixed to the top of the opposite side of the two movable plates (44).

2. The laboratory geotechnical testing device according to claim 1, characterized in that: The sample tube (3) is formed by a plurality of tube segments connected by threads, a sealing gasket is provided between two of the tube segments, and a plurality of through holes are provided on the outer surface of the sample tube (3).

3. The laboratory geotechnical testing device according to claim 1, characterized in that: A high-precision displacement sensor is fixed to the top of the right side of the sample cylinder (3), and the high-precision displacement sensor is connected to the data acquisition card via a wire.

4. The laboratory geotechnical testing device according to claim 1, characterized in that: The two movable plates (44) are symmetrically distributed on the left and right sides of the vertical center axis of the limiting rod (42), and the top of the movable plate (44) passes through the base (1) and extends to the upper side of the base (1).

5. The laboratory geotechnical testing device according to claim 1, characterized in that: The clamping block (45) is a rubber block, and guide holes that match the size of the movable plate (44) are provided at both left and right ends of the upper surface of the base (1).

6. The laboratory geotechnical testing device according to claim 1, characterized in that: The loading mechanism (7) comprises two fixed blocks (71), a driving motor (72), a screw (73), a movable sleeve (74), a second electric push rod (75) and a pressure sensor (76), wherein the two fixed blocks (71) are fixed to the left and right ends of the lower surface of the load-bearing plate (6), the driving motor (72) is fixed to the right side of the right-end fixed block (71), the screw (73) is rotatably connected between the two opposite sides of the fixed blocks (71) through a bearing, the output shaft of the driving motor (72) passes through the right-end fixed block (71) and extends to the left side of the right-end fixed block (71) and is fixed to the screw (73), the movable sleeve (74) is threadedly connected to the screw (73), the second electric push rod (75) is fixed to the lower surface of the movable sleeve (74), and the pressure sensor (76) is fixedly connected to the piston rod of the second electric push rod (75).

7. The laboratory geotechnical testing device according to claim 6, characterized in that: The pressure sensor (76) is connected to the data acquisition card via a wire.

8. The laboratory geotechnical testing device according to claim 6, characterized in that: A slider is fixed on the upper surface of the movable sleeve (74), and a slide groove is provided on the lower surface of the load-bearing plate (6). The slider performs horizontal linear motion in the inner cavity of the slide groove.

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