Soil sampling device

Abstract

The invention relates to the technical field of hydraulic engineering construction equipment, in particular to a soil sampling device which comprises an excavator, a rock soil sampling device is arranged on the excavator, and the rock soil sampling device comprises a sampling rod used for sampling rock soil and a driving mechanism used for driving the sampling rod to move. The sampling rod is a hollow rod, a storage cavity for storing samples is formed in the inner wall of the sampling rod, and a plugging device is arranged between the storage cavity and the hollow cavity of the sampling rod; the plugging device comprises a plugging plate and an adjusting mechanism; the plugging plate is used for plugging and communicating the storage cavity and the hollow cavity; the adjusting mechanism is used for driving the plugging plate to adjust; and the plugging plate is rotationally matched on the sampling rod. The soil sampling device has the effects of reducing impurities entering a sample during re-sampling and improving the sampling accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of water conservancy project construction equipment, and in particular to a soil sampling device. Background Art

[0002] A water pipeline is a general term for pipes and channels that transport water from a distant water source to the water-using location. In a broad sense, it refers to the entire long-distance water supply system, including pipes, open channels, culverts, and tunnels. In a narrow sense, it only refers to water supply structures that cross valleys, river valleys, or low-lying areas. When constructing and installing a water pipeline, it is necessary to first use a soil sampling device to conduct rock and soil sampling operations at the construction site. After the sampling is completed, the foundation pit is excavated. After the foundation pit is excavated, the pipeline is installed and used.

[0003] Current soil sampling devices are usually used for geotechnical exploration at the location to be excavated. Geotechnical exploration can help engineers understand key information such as the type, distribution, physical and chemical properties of underground soil layers, and groundwater conditions. This information is crucial for determining the method of foundation pit excavation, the design of the support system, and the prediction and prevention of potential geological disasters (such as soil landslides, collapses, etc.).

[0004] When drilling and sampling soft soil, after one sampling is completed, due to the soft soil, when the sample is taken out of the borehole, the soil around the borehole is prone to collapse.

[0005] The inventor believes that the prior art has the defect that impurities may enter the sample when re-sampling, resulting in low sampling accuracy. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a soil sampling device, which has the effect of reducing the entry of impurities into the sample during re-sampling and improving the accuracy of sampling.

[0007] The present application provides a soil sampling device, which adopts the following technical solution:

[0008] A soil sampling device comprises an excavator, on which a rock and soil sampling device is provided, the rock and soil sampling device comprises a sampling rod for sampling rock and soil and a driving mechanism for driving the sampling rod to move, the sampling rod is a hollow rod, a storage cavity for storing samples is provided on the inner wall of the sampling rod, a blocking device is provided between the storage cavity and the hollow cavity of the sampling rod, the blocking device comprises a blocking plate for blocking and connecting the storage cavity and the hollow cavity and an adjusting mechanism for driving the blocking plate to adjust, and the blocking plate is rotatably fitted on the sampling rod.

[0009] By adopting the above technical solution, through the setting of the storage cavity and the sealing device, when the rock and soil are sampled by the sampling rod, the sealing plate is driven to rotate by the adjusting mechanism, so that the storage cavity and the hollow cavity are connected, and the rock and soil can enter the storage cavity through the hollow cavity. After the sampling is completed, the sealing plate is driven to rotate by the adjusting mechanism, so that the storage cavity and the hollow cavity are sealed, so that impurities will not enter the sample when sampling again, thereby improving the accuracy of sampling.

[0010] Optionally, the adjustment mechanism includes an adjustment component for driving the blocking plate to rotate and an elastic member for driving the blocking plate to reset.

[0011] Optionally, a rotating seat is provided on the sampling rod, and the rotating seat includes a fixed seat fixedly mounted on the sampling rod and a rotating shaft rotatably matched with the fixed seat, the sealing plate is fixedly connected to the rotating shaft, one end of the elastic member is connected to the fixed seat, and the other end is connected to the sealing plate.

[0012] Optionally, the adjustment component 1 includes an extrusion rod for pushing the sealing plate to rotate open, a lifting plate for driving the extrusion rod to rise and fall, and a driving component for driving the lifting plate to rise and fall.

[0013] Optionally, the driving assembly includes a mounting frame mounted on the inner wall of the sampling rod, a guide rod mounted on the mounting frame, a lifting screw threadedly engaged with the lifting plate, and a driving member for driving the lifting screw to rotate, and the lifting plate is slidably engaged with the guide rod.

[0014] Optionally, a plurality of sealing plates for sealing the hollow cavity of the sampling rod are arranged in the sampling rod, one end of the sealing plate is rotatably engaged with the inner wall of the sampling rod, and the lifting plate is used to drive one end of the sealing plate to rotate to seal and connect the hollow cavity.

[0015] Optionally, one end of the sealing plate abuts against an upper surface of the mounting frame close to the inner wall of the sampling rod, and the other end abuts against an upper surface of the lifting plate.

[0016] Optionally, the driving mechanism includes a fixed frame installed on the excavator, a sliding frame slidingly cooperated with the fixed frame in the horizontal direction, a driver for driving the sliding frame to slide, a rotating assembly for driving the sampling rod to rotate, and a lifting assembly for driving the sampling rod to rise and fall.

[0017] By adopting the above technical solution, the sliding frame can be driven to slide through driver 1, and then the sampling rod can be driven to slide and adjust in the horizontal direction along the fixed frame. Then, the sampling rod can be driven to perform sampling operations through the rotating component and the lifting component, so that the position of the sampling rod in the horizontal direction can be accurately adjusted, and sampling operations can be performed on rock and soil at different positions, making the sampling operation more efficient.

[0018] Optionally, the rotating assembly includes a worm wheel for driving the sampling rod to rotate, a worm meshed with the worm wheel, and a second driving member for driving the worm to rotate.

[0019] Optionally, the lifting assembly includes a guide frame that slides on the sliding frame in the vertical direction, a lifting frame and a second driver for driving the lifting frame to move up and down. The sampling rod is rotationally engaged with the guide frame and the lifting frame, and the second driver is installed on the guide frame.

[0020] By adopting the above technical solution, starting driver 2 can drive the lifting frame and the guide frame to slide and adjust in the vertical direction, and then drive the sampling rod to lift and adjust, so that when the sampling rod is sampling, it can sample rock and soil at different depths, making the sampling operation more efficient.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Through the setting of the storage cavity and the blocking device, when the rock and soil are sampled by the sampling rod, the blocking plate is driven to rotate by the adjusting mechanism, so that the storage cavity and the hollow cavity are connected, and the rock and soil can enter the storage cavity through the hollow cavity. After the sampling is completed, the blocking plate is driven to rotate by the adjusting mechanism, so that the storage cavity and the hollow cavity are blocked, so that impurities will not enter the sample when sampling again, thereby improving the accuracy of sampling;

[0023] 2. Sliding adjustment is performed in the horizontal direction, and then the sampling rod is driven to perform sampling operations through the rotating assembly and the lifting assembly, which can realize the precise adjustment of the horizontal position of the sampling rod, and then the rock and soil at different positions are sampled. Sliding adjustment is performed in the horizontal direction, and then the sampling rod is driven to perform sampling operations through the rotating assembly and the lifting assembly, which can realize the precise adjustment of the horizontal position of the sampling rod, and then the rock and soil at different positions are sampled, making the sampling operation more efficient;

[0024] 3. Start the second driver, which can drive the lifting frame and the guide frame to slide and adjust in the vertical direction, and then drive the sampling rod to lift and adjust, so that the sampling rod can sample rock and soil at different depths when sampling, making the sampling operation more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of this application;

[0026] Figure 2 is a partial cross-sectional view of the present application;

[0027] Figure 3is a partial cross-sectional view showing the connection relationship between the blocking device and the sampling rod in the present application;

[0028] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0029] Explanation of the reference numerals: 1. excavator; 2. soil sampling device; 21. sampling rod; 211. storage chamber; 23. fixed frame; 24. sliding frame; 25. driver one; 26. rotating assembly; 261. worm gear; 262. worm; 263. driver two; 27. lifting assembly; 271. guide frame; 272. lifting frame; 273. driver two; 3. blocking device; 31. blocking plate; 32. adjusting assembly one; 322. extrusion rod; 323. lifting plate; 324. driving assembly; 325. mounting frame; 326. guide rod; 327. lifting screw; 328. driving member one; 33. elastic member; 4. rotating seat; 41. fixed seat; 42. rotating shaft; 5. sealing plate. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 This application is described in further detail.

[0031] The present application embodiment discloses a soil sampling device. Figure 1-Figure 4 , including an excavator 1, on which a rock and soil sampling device 2 is provided, the rock and soil sampling device 2 is used for sampling rock and soil, the rock and soil sampling device 2 includes a sampling rod 21 for sampling rock and soil and a driving mechanism for driving the sampling rod 21 to move. When it is necessary to excavate a foundation pit, the rock and soil sampling device 2 is first moved to a position to be excavated by the excavator 1, and then the rock and soil sampling device 2 is used to sample the rock and soil. During sampling, the sampling rod 21 is driven to move by the driving mechanism, and the sampling rod 21 rotates and descends at the same time, so that rock and soil sampling can be performed on the position to be sampled.

[0032] Reference Figure 1 and Figure 2 The sampling rod 21 is a hollow rod, and the bottom end of the sampling rod 21 is a conical structure. A storage cavity 211 for storing samples is provided on the inner wall of the sampling rod 21. The storage cavity 211 is arranged in an annular manner. A blocking device 3 is provided between the storage cavity 211 and the hollow cavity of the sampling rod 21. The blocking device 3 is used to block and connect the storage cavity 211 and the hollow cavity.

[0033] Reference Figure 2-Figure 4The sealing device 3 includes a sealing plate 31 for sealing and communicating between the storage chamber 211 and the hollow chamber and an adjusting mechanism for driving the sealing plate 31 to adjust. The sealing plate 31 is rotatably matched with the sampling rod 21. The sealing plate 31 is an arc-shaped plate, and four sealing plates 31 are provided. A rotating seat 4 is provided on the sampling rod 21. The rotating seat 4 includes a fixed seat 41 fixedly mounted on the sampling rod 21 and a rotating shaft 42 rotatably matched with the fixed seat 41. A groove for installing the rotating seat 4 is opened at the top of the sealing plate 31, and the sealing plate 31 is fixedly connected to the rotating shaft 42. When the bottom end of the sealing plate 31 rotates into the storage chamber 211, the storage chamber 211 is connected with the hollow chamber. When the bottom end of the sealing plate 31 rotates to a vertical position, the sealing plate 31 blocks the storage chamber 211, so that the storage chamber 211 and the hollow chamber are no longer connected.

[0034] Reference Figure 2-Figure 4 The adjustment mechanism includes an adjustment component 32 for driving the blocking plate 31 to rotate and an elastic member 33 for driving the blocking plate 31 to reset. The elastic member 33 can directly adopt a torsion spring. The elastic member 33 is sleeved on the rotating shaft 42. One end of the elastic member 33 is fixedly connected to the fixing seat 41, and the other end is fixedly connected to the blocking plate 31.

[0035] Reference Figure 2-Figure 4 The adjusting component 32 includes an extrusion rod 322 for pushing the blocking plate 31 to rotate open, a lifting plate 323 for driving the extrusion rod 322 to rise and fall, and a driving component 324 for driving the lifting plate 323 to rise and fall. The lifting plate 323 is a disc-shaped structure, the extrusion rod 322 is an "L"-shaped rod, and one end of the extrusion rod 322 close to the blocking plate 31 is set as an inclined surface. One end of the extrusion rod 322 is fixedly connected to the lifting plate 323, and the other end abuts against the side of the blocking plate 31. There are four extrusion rods 322 in total.

[0036] Among them, refer to Figure 2-Figure 4 The driving assembly 324 includes a mounting frame 325 fixedly mounted on the inner wall of the sampling rod 21, a guide rod 326 fixedly mounted on the mounting frame 325, a lifting screw 327 threadedly engaged with the lifting plate 323, and a driving member 328 for driving the lifting screw 327 to rotate. The mounting frame 325 is a "cross" structure, the guide rod 326 is vertically arranged, the lifting screw 327 is vertically arranged, and the mounting frame 325 supports the lifting screw 327 for rotation, the lifting plate 323 is slidably engaged with the guide rod 326, the driving member 328 can directly use an electric motor, and the output shaft of the driving member 328 is fixedly connected to the lifting screw 327.

[0037] Reference Figure 2-Figure 4When the sampling rod 21 is used to sample rock and soil, the driving member 328 is started, and the output shaft of the driving member 328 can drive the lifting screw 327 to rotate. When the lifting screw 327 rotates, it can drive the lifting plate 323 to slide along the guide rod 326 in the vertical direction. When the lifting plate 323 slides vertically upward, it can drive the extrusion rod 322 to slide upward at the same time. During the upward sliding process of the extrusion rod 322, the sealing plate 31 can be gradually squeezed, so that the sealing plate 31 rotates, and the bottom end of the sealing plate 31 rotates around its top end into the storage chamber 211. At this time, the storage chamber 211 is connected with the hollow cavity, and the sample in the hollow cavity can enter the storage chamber 211 through the sealing plate 31 to realize the storage of the sample.

[0038] Reference Figure 2-Figure 4 When the bottom end of the sealing plate 31 rotates, the elastic member 33 can be compressed. When the sample in the storage chamber 211 is stored, the driving member 328 is started. The output shaft of the driving member 328 can drive the lifting screw 327 to rotate in the opposite direction. When the lifting screw 327 rotates, the lifting plate 323 can be driven to slide vertically downward, and the extrusion rod 322 can be driven to slide downward at the same time. During the downward sliding process of the extrusion rod 322, the sealing plate 31 is no longer squeezed. At this time, the elastic restoring force of the elastic member 33 can drive the bottom end of the sealing plate 31 to rotate, so that the sealing plate 31 is reset. The bottom end of the sealing plate 31 rotates to a vertical state. At this time, the storage chamber 211 and the hollow cavity are blocked, and the sampling operation of the sample is completed.

[0039] Reference Figure 2-Figure 4 In order to further prevent impurities from entering the sample, a plurality of sealing plates 5 are provided in the sampling rod 21 for sealing the hollow cavity of the sampling rod 21. There are four sealing plates 5 in total. The sealing plates 5 are fan-shaped plates, and a notch is provided at one end of the four sealing plates 5 close to each other. A hinge seat (not shown in the figure) is fixedly installed on the inner wall of the sampling rod 21. One end of the sealing plate 5 is rotated and matched with the inner wall of the sampling rod 21 through the hinge seat. The lifting plate 323 is used to drive one end of the sealing plate 5 to rotate to seal and connect the hollow cavity. One end of the sealing plate 5 abuts against the upper surface of the mounting frame 325 close to the inner wall of the sampling rod 21, and the other end abuts against the upper surface of the lifting plate 323.

[0040] Reference Figure 2-Figure 4 When the lifting plate 323 rises, the upper surface of the lifting plate 323 can push the sealing plate 5 close to one end of the lifting plate 323 to rise, so that the sealing plate 5 rotates. At the same time, the four sealing plates 5 no longer seal the hollow cavity, and the sample can enter the top of the sealing plate 5. When the lifting plate 323 descends, under the action of gravity, one end of the sealing plate 5 rotates downward, the four sealing plates 5 are reset, and cooperate with the lifting plate 323 to seal the hollow cavity.

[0041] Reference Figure 2-Figure 4 The driving mechanism includes a fixed frame 23 fixedly mounted on the excavator 1, a sliding frame 24 slidingly matched with the fixed frame 23 in the horizontal direction, a driver 25 for driving the sliding frame 24 to slide, a rotating component 26 for driving the sampling rod 21 to rotate, and a lifting component 27 for driving the sampling rod 21 to rise and fall. The fixed frame 23 is an "I"-shaped structure, and the sliding frame 24 is a "door"-shaped structure. The driver 25 can directly use a hydraulic cylinder. The cylinder body of the driver 25 is fixedly connected to the fixed frame 23, and the piston rod of the driver 25 is fixedly connected to the sliding frame 24.

[0042] Reference Figure 2 and Figure 3 The rotating assembly 26 includes a worm wheel 261 for driving the sampling rod 21 to rotate, a worm 262 meshing on the worm wheel 261, and a driving member 263 for driving the worm 262 to rotate. The worm wheel 261 is fixedly connected to the sampling rod 21, and the driving member 263 can directly use a motor. The output shaft of the driving member 263 is fixedly connected to the worm 262.

[0043] Reference Figure 2 and Figure 3 The lifting assembly 27 includes a guide frame 271 that slides along the vertical direction on the sliding frame 24, a lifting frame 272 and a driver 273 for driving the lifting frame 272 to move up and down. The lifting frame 272 is a "door" shaped structure. The driving member 263 is fixedly installed on the guide frame 271, and a plate for rotating support of the worm 262 is installed on the guide frame 271. The driving member 328 is fixedly installed on the lifting frame 272, and the sampling rod 21 is rotationally matched with the guide frame 271 and the lifting frame 272.

[0044] Reference Figure 1-Figure 3 When it is necessary to perform sampling operations on rock and soil, first start the driver 1 25 to drive the sliding frame 24 to slide and adjust in the horizontal direction. After the sliding adjustment is completed, start the driver 273 to drive the lifting frame 272 and the guide frame 271 to perform lifting and lowering adjustments. When the lifting frame 272 drives the sampling rod 21 to descend, start the driver 263 at the same time. The output shaft of the driver 263 can drive the worm 262 to rotate. When the worm 262 rotates, the worm wheel 261 can drive the sampling rod 21 to rotate. When the worm wheel 261 rotates, it can drive the sampling rod 21 to rotate, so that the sampling rod 21 can rotate and descend at the same time to perform sampling operations on rock and soil.

[0045] The implementation principle of a soil sampling device in an embodiment of the present application is as follows: first, the rock and soil sampling device 2 is moved to the position to be excavated by the excavator 1, and then the rock and soil sampling device 2 is used to perform sampling operations on the rock and soil. When sampling, the driver 1 25 is first started to drive the sliding frame 24 to perform sliding adjustment in the horizontal direction. After the sliding adjustment is completed, the driver 2 273 is started to drive the lifting frame 272 and the guide frame 271 to perform lifting adjustment. When the lifting frame 272 drives the sampling rod 21 to descend, the driving member 263 is started at the same time. The output shaft of the driving member 263 can drive the worm 262 to rotate. When the worm 262 rotates, the worm can drive the worm wheel 261 to rotate. When the worm wheel 261 rotates, it can drive the sampling rod 21 to rotate, so that the sampling rod 21 can rotate while descending to perform sampling operations on the rock and soil.

[0046] When the sampling rod 21 is sampling, the driving member 328 is started, and the output shaft of the driving member 328 can drive the lifting screw 327 to rotate. When the lifting screw 327 rotates, it can drive the lifting plate 323 to slide and adjust along the guide rod 326 in the vertical direction. When the lifting plate 323 slides vertically upward, it can drive the squeezing rod 322 to slide upward at the same time. During the upward sliding process of the squeezing rod 322, the blocking plate 31 can be gradually squeezed, so that the blocking plate 31 rotates, and the bottom end of the blocking plate 31 rotates around its top end toward the storage cavity 211. At this time, the storage cavity 211 is connected with the hollow cavity, and the sample in the hollow cavity can enter the storage cavity 211 through the blocking plate 31 to realize the storage of the sample.

[0047] At the same time, when the lifting plate 323 rises, the upper surface of the lifting plate 323 can push the sealing plate 5 close to the end of the lifting plate 323 to rise, so that the sealing plate 5 rotates, and at the same time, the four sealing plates 5 no longer seal the hollow cavity, and the sample can enter the upper part of the sealing plate 5 and enter the storage cavity 211;

[0048] When the bottom end of the blocking plate 31 rotates, the elastic member 33 can be compressed. When the sample in the storage chamber 211 is stored, the driving member 328 is started, and the output shaft of the driving member 328 can drive the lifting screw 327 to rotate in the opposite direction. When the lifting screw 327 rotates, it can drive the lifting plate 323 to slide vertically downward, and can drive the extrusion rod 322 to slide downward at the same time. During the downward sliding process of the extrusion rod 322, the blocking plate 31 is no longer squeezed. At this time, the elastic restoring force of the elastic member 33 can drive the bottom end of the blocking plate 31 to rotate, so that the blocking plate 31 is reset, and the bottom end of the blocking plate 31 rotates to a vertical state. At this time, the storage chamber 211 and the hollow cavity are blocked;

[0049] At the same time, when the lifting plate 323 descends, under the action of gravity, one end of the sealing plate 5 rotates downward, the four sealing plates 5 are reset, and cooperate with the lifting plate 323 to seal the hollow cavity, completing the sampling operation of the sample.

[0050] In the present application, by setting up the storage chamber 211 and the sealing device 3, when the rock and soil are sampled by the sampling rod 21, the sealing plate 31 is driven to rotate by the adjusting mechanism, so that the storage chamber 211 and the hollow cavity are connected, and the rock and soil can enter the storage chamber 211 through the hollow cavity. After the sampling is completed, the sealing plate 31 is driven to rotate by the adjusting mechanism, so that the storage chamber 211 and the hollow cavity are blocked, so that impurities will not enter the sample when sampling again, thereby improving the accuracy of sampling.

[0051] In the description of the present application, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 a limitation on the present application.

[0052] 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 this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A soil sampling device, comprising an excavator (1), wherein the excavator (1) is provided with a rock and soil sampling device (2), characterized in that: The rock and soil sampling device (2) comprises a sampling rod (21) for sampling rock and soil and a driving mechanism for driving the sampling rod (21) to move. The sampling rod (21) is a hollow rod. A storage cavity (211) for storing samples is provided on the inner wall of the sampling rod (21). A blocking device (3) is provided between the storage cavity (211) and the hollow cavity of the sampling rod (21). The blocking device (3) comprises a blocking plate (31) for blocking and connecting the storage cavity (211) and the hollow cavity and an adjusting mechanism for driving the blocking plate (31) to adjust. The blocking plate (31) is rotatably matched with the sampling rod (21).

2. A soil sampling device according to claim 1, characterized in that: The adjustment mechanism comprises an adjustment component (32) for driving the blocking plate (31) to rotate and an elastic member (33) for driving the blocking plate (31) to reset.

3. A soil sampling device according to claim 2, characterized in that: The sampling rod (21) is provided with a rotating seat (4), the rotating seat (4) comprising a fixed seat (41) fixedly mounted on the sampling rod (21) and a rotating shaft (42) rotatably matched with the fixed seat (41), the blocking plate (31) is fixedly connected to the rotating shaft (42), one end of the elastic member (33) is connected to the fixed seat (41), and the other end is connected to the blocking plate (31).

4. A soil sampling device according to claim 3, characterized in that: The first adjustment component (32) comprises an extrusion rod (322) for pushing the blocking plate (31) to rotate open, a lifting plate (323) for driving the extrusion rod (322) to move up and down, and a driving component (324) for driving the lifting plate (323) to move up and down.

5. A soil sampling device according to claim 4, characterized in that: The driving assembly (324) comprises a mounting frame (325) mounted on the inner wall of the sampling rod (21), a guide rod (326) mounted on the mounting frame (325), a lifting screw (327) threadedly engaged with the lifting plate (323), and a driving member (328) for driving the lifting screw (327) to rotate, wherein the lifting plate (323) is slidably engaged with the guide rod (326).

6. A soil sampling device according to claim 5, characterized in that: A plurality of sealing plates (5) for sealing the hollow cavity of the sampling rod (21) are arranged inside the sampling rod (21); one end of the sealing plate (5) is rotatably engaged with the inner wall of the sampling rod (21); and the lifting plate (323) is used to drive one end of the sealing plate (5) to rotate so as to seal and connect the hollow cavity.

7. A soil sampling device according to claim 6, characterized in that: One end of the sealing plate (5) abuts against the upper surface of the mounting frame (325) close to the inner wall of the sampling rod (21), and the other end abuts against the upper surface of the lifting plate (323).

8. A soil sampling device according to claim 1, characterized in that: The driving mechanism comprises a fixed frame (23) mounted on the excavator (1), a sliding frame (24) slidingly matched with the fixed frame (23) in the horizontal direction, a driver (25) for driving the sliding frame (24) to slide, a rotating assembly (26) for driving the sampling rod (21) to rotate, and a lifting assembly (27) for driving the sampling rod (21) to rise and fall.

9. A soil sampling device according to claim 8, characterized in that: The rotating assembly (26) comprises a worm wheel (261) for driving the sampling rod (21) to rotate, a worm (262) meshed with the worm wheel (261), and a second driving member (263) for driving the worm (262) to rotate.

10. A soil sampling device according to claim 9, characterized in that: The lifting assembly (27) comprises a guide frame (271) slidably matched on the sliding frame (24) along the vertical direction, a lifting frame (272) and a second driver (273) for driving the lifting frame (272) to move up and down. The sampling rod (21) is rotationally matched with the guide frame (271) and the lifting frame (272), and the second driving member (263) is installed on the guide frame (271).

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