Soil collecting device for surface runoff cultivated land

Abstract

The soil collecting device comprises a sample storage pipe and an outer sleeve arranged on the sample storage pipe in a sleeving mode, the upper end of the outer sleeve is open, the lower end of the outer sleeve is provided with a conical part, a supporting disc is arranged on the outer sleeve, a rotating disc located on the upper side of the supporting disc is movably arranged on the outer sleeve through a bearing, and at least one clamping hole is formed in the circumferential direction of the rotating disc. The bottom end of the sample storage pipe is closed, the upper end of the sample storage pipe is open, the sample storage pipe is provided with a mounting disc located on the upper side of the rotating disc, the bottom of the mounting disc is provided with a first mounting ring capable of being arranged on the rotating disc in a sleeving mode, the first mounting ring is provided with a first positioning structure matched with the clamping hole, and the circumferential wall of the sample storage pipe is provided with at least one feeding port; a material guiding opening matched with the feeding opening is formed in the outer sleeve, and a second positioning structure used for aligning the feeding opening and the material guiding opening is arranged between the mounting disc and the supporting disc, so that the problems of inconvenience in use and difficulty in operation in the prior art are solved, and the efficiency and convenience of soil sampling are improved.

Description

Technical Field

[0001] This utility model relates to the field of soil sampling technology, specifically to a surface runoff soil sampling device for cultivated land. Background Technology

[0002] Farmland soil is of great importance to agricultural development. The quality of farmland soil determines the yield and quality of crops planted on that farmland. Therefore, when deciding to plant on a certain piece of farmland, it is often necessary to first sample the soil of that farmland to determine its quality.

[0003] In the prior art, to protect the collected soil and obtain complete soil samples, sampling is carried out using internal and external sampling tubes. For example, patent application document "CN202220996937.9" discloses a sampler for contaminated farmland soil, which includes a sampling tube, a base, and a motor mounted on the base. The output end of the motor is provided with a spline connector. The sampling tube includes an external sampling tube and an internal sampling tube. The lower end of the external sampling tube is connected to a drill bit, and the outer wall of the upper end of the external sampling tube is provided with a keyway that mates with the spline connector. The external sampling tube has multiple external sampling ports along its length. The internal sampling tube is rotatably disposed inside the external sampling tube, and its lower end is closed. The internal sampling tube has multiple internal sampling ports along its length, and each internal sampling port corresponds to an external sampling port located at the same horizontal plane. The internal sampling tube has multiple layers of partitions, and the multiple partitions and the multiple internal sampling ports are alternately arranged. However, this method requires that the outer sampling port of the outer sampling tube and the inner sampling port of the inner sampling tube be staggered before the sampling tube is drilled into the soil. After drilling into the soil, the inner and outer sampling ports need to be aligned, which presents a problem of difficulty in alignment or staggering. The operation is difficult. Furthermore, during the process of drilling the sampling tube into the soil, the motor needs to be removed, the positions of the inner and outer sampling tubes need to be adjusted, and then reinstalled, making it cumbersome to use. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a surface runoff soil sampling device for cultivated land, which solves the problems of inconvenience and difficulty in operation in the existing technology, and improves the efficiency and convenience of soil sampling.

[0005] This utility model provides a surface runoff soil sampling device for solving the above-mentioned technical problems. It includes a sample storage tube and an outer sleeve fitted onto the sample storage tube. The outer sleeve is open at the upper end and has a tapered portion at the lower end. A support plate is provided on the outer sleeve. A turntable located above the support plate is movably mounted on the outer sleeve via a bearing. The turntable has at least one snap-fit ​​hole on its circumference. The sample storage tube is closed at the bottom and open at the upper end. A mounting plate is provided on the sample storage tube located above the turntable. The bottom of the mounting plate has a first mounting ring that can be fitted onto the turntable. The first mounting ring has a first positioning structure that mates with the snap-fit ​​hole. At least one feed inlet is provided on the peripheral wall of the sample storage tube. A guide port that mates with the feed inlet is provided on the outer sleeve. A second positioning structure for aligning the feed inlet and the guide port is provided between the mounting plate and the support plate.

[0006] Furthermore, the first positioning structure includes a first mounting sleeve disposed on a first mounting ring, and a first positioning rod movably disposed within the mounting sleeve, one end of which protrudes from the first mounting ring and engages with the snap-fit ​​hole, and the other end of the first positioning rod protrudes from the mounting sleeve and is fixed to a first pull ring. A first elastic element is disposed within the mounting sleeve, one end of which is fixed to a protruding ring on the first positioning rod, and the other end is fixed to the inner wall of the mounting sleeve on the side away from the first mounting ring.

[0007] Furthermore, the second positioning structure includes an alignment positioning hole and a staggered positioning hole provided on the support plate. The mounting plate is provided with a second mounting sleeve. A second positioning rod is movably provided inside the second mounting sleeve. The upper end of the second positioning rod movably passes through the second mounting sleeve and is fixed to the second pull ring. The lower end movably passes through the mounting plate and cooperates with the alignment positioning hole or the staggered positioning hole. A second elastic element is provided inside the second mounting sleeve. One end of the second elastic element is fixed to the second protruding ring on the second positioning rod, and the other end is fixed to the inner wall of the second mounting sleeve on the side away from the mounting plate.

[0008] Furthermore, it also includes a base, on which a frame is provided, and on which a mounting seat is movably provided. The mounting seat is raised and lowered by a lifting mechanism. The mounting seat is provided with a second mounting ring for mounting the outer tube via a bearing. The inner wall of the second mounting ring is provided with a clamping block via a spring. The mounting seat is provided with a drive mechanism for driving the outer tube to rotate.

[0009] Furthermore, the outer wall of the outer sleeve is provided with a positioning arc-shaped groove that cooperates with the clamping block. The positioning arc-shaped groove extends along the circumferential direction of the outer sleeve. One side of the positioning arc-shaped groove smoothly transitions with the outer wall of the outer sleeve, and the other side is recessed towards the center of the outer sleeve to form a stop surface.

[0010] Furthermore, the lifting mechanism includes a first motor and a screw fixed to the output end of the first motor. The screw is threadedly engaged with the mounting base, and the mounting base is slidably engaged with the frame through a sliding hole.

[0011] Furthermore, the drive mechanism includes a second motor and a drive gear fixed to the output end of the second motor, and the second mounting ring is provided with a toothed ring that meshes with the drive gear.

[0012] Furthermore, the upper end of the sample storage tube is provided with a cap, and the cap is threadedly connected to the sample storage tube.

[0013] Furthermore, the outer side of the conical portion is provided with helical blades.

[0014] Furthermore, an arc-shaped guide plate is provided on one side of the feed inlet.

[0015] The beneficial effects of this utility model are as follows: the sample storage tube is used to store sampled soil, and the outer tube is used to drill into the soil. The outer tube is fitted onto the sample storage tube to protect it. The tapered part on the outer tube is designed to facilitate drilling into the soil. The support plate on the outer tube can be used to support the turntable and can also cooperate with the mounting plate on the sample storage tube. The relative position between the sample storage tube and the outer tube is limited by the second positioning structure, which can achieve alignment or offset between the guide port on the outer tube and the inlet on the sample storage tube. The turntable is mounted on the support plate by bearings, allowing the turntable to rotate relative to the outer tube. The snap-fit ​​holes on the circumference of the turntable cooperate with the first positioning structure on the first mounting ring on the sample storage tube, which facilitates the installation or removal of the sample storage tube from the first mounting ring, thus facilitating the extraction of the soil from the sample storage tube.

[0016] The base is used to support the mounting seat on the ground. The second mounting ring on the mounting seat is used to install the outer sleeve. A bearing is installed between the second mounting ring and the mounting seat, allowing the second mounting ring to rotate relative to the mounting seat. That is, when the outer sleeve is installed in the second mounting ring, it can rotate relative to the mounting seat. When the lifting mechanism drives the mounting seat to rise and fall, it can also drive the outer sleeve and sample storage tube on the mounting seat to rise and fall synchronously. At the same time, the drive mechanism drives the outer sleeve to rotate, so that the outer sleeve is screwed into the soil or removed from the soil.

[0017] In use, the base is placed on the ground, and the sample storage tube is inserted into the outer sleeve. The first positioning structure secures the sample storage tube to the outer sleeve, and the second positioning structure misaligns the inlet of the sample storage tube with the guide port of the outer sleeve. The outer sleeve is then inserted into the second mounting ring on the mounting base, and the clamping block secures it in the ring. The lifting mechanism is activated, causing the mounting base to move downwards, which in turn moves the outer sleeve downwards. Simultaneously, the drive mechanism rotates the outer sleeve, drilling it into the soil. The second positioning structure allows relative rotation between the sample storage tube and the outer sleeve. Rotating the sample storage tube aligns the guide port and the inlet, allowing for soil sampling. After sampling, the guide port and inlet can be misaligned again to protect the soil inside the sample storage tube. Finally, the lifting mechanism moves the mounting base upwards, pulling the outer sleeve out of the soil. The first positioning structure then removes the sample storage tube from the outer sleeve, yielding the sampled soil.

[0018] In summary, by adopting this utility model, the second positioning structure can easily align or stagger the feed inlet and guide outlet, facilitating operation. The first positioning structure facilitates the disassembly of the sample storage tube and the outer tube, making it easy to remove the collected soil. Through the cooperation of the drive mechanism and the lifting mechanism, there is no need to remove or reinstall the motor during the sampling process, thus improving sampling efficiency.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the outer sleeve of this utility model;

[0022] Figure 3 for Figure 1 A magnified view of the details of A;

[0023] Figure 4 for Figure 1 A magnified view of the details of B;

[0024] Figure 5 for Figure 1 A magnified view of the details of C.

[0025] In the attached diagram: 1-Sample storage tube, 11-Mounting plate, 111-First mounting ring, 12-Inlet, 2-Outer sleeve, 21-Conical part, 211-Helical blade, 22-Support plate, 221-Alignment positioning hole, 222-Offset positioning hole, 23-Turntable, 231-Snap-fit ​​hole, 24-Guide port, 241-Arc-shaped guide plate, 25-Positioning arc groove, 251-Stop surface, 3-First positioning structure, 31-First mounting sleeve, 32-First positioning rod, 321-First convex ring, 33-First mounting ring 1. Pull ring, 34. First elastic element, 4. Second positioning structure, 41. Second mounting sleeve, 42. Second positioning rod, 421. Second convex ring, 43. Second pull ring, 44. Second elastic element, 5. Base, 51. Frame, 52. Mounting seat, 521. Sliding hole, 53. Second mounting ring, 531. Toothed ring, 532. Pressing block, 533. Spring piece, 6. Lifting mechanism, 61. First motor, 62. Screw, 7. Drive mechanism, 71. Second motor, 72. Drive gear, 8. Cover. Detailed Implementation

[0026] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0027] Reference Figures 1 to 5 This utility model provides a surface runoff soil sampling device, including a sample storage tube 1 and an outer sleeve 2 fitted onto the sample storage tube 1. The sample storage tube 1 is used to store sampled soil, and the outer sleeve 2 is used to penetrate into the soil. The outer sleeve 2 is fitted onto the sample storage tube 1 to protect it. Furthermore, the upper end of the sample storage tube 1 is provided with a cap 8, which is threadedly connected to the sample storage tube 1 to seal the sample storage tube 1 and ensure the accuracy of the soil sample.

[0028] The outer sleeve 2 has an opening at the upper end and a tapered portion 21 at the lower end. Furthermore, the outer side of the tapered portion 21 is provided with a spiral blade 211 to facilitate drilling into the soil and improve sampling efficiency. The outer sleeve 2 is provided with a support plate 22. A turntable 23 located on the upper side of the support plate 22 is movably mounted on the outer sleeve 2 via a bearing, allowing the turntable 23 to rotate relative to the outer sleeve 2. The turntable 23 has at least one snap-fit ​​hole 231 on its circumference. The bottom end of the sample storage tube 1 is closed and the top end is open. The sample storage tube 1 is provided with a mounting plate 11 located on the upper side of the turntable 23. The bottom of the mounting plate 11 is provided with a first mounting ring 111 that can be fitted onto the turntable 23. The first mounting ring 111 is provided with a first positioning structure 3 that cooperates with the snap-fit ​​hole 231. At this time, the first positioning structure 3 cooperates with the snap-fit ​​hole 231 to fix the sample storage tube 1 on the turntable 23, which makes it easy to install the sample storage tube 1 on the first mounting ring 111 or remove the sample storage tube 1 from the first mounting ring 111, thus facilitating the removal of the soil inside the sample storage tube 1.

[0029] The first positioning structure 3 includes a first mounting sleeve 31 disposed on a first mounting ring 111. A first positioning rod 32 is movably disposed inside the mounting sleeve, with one end extending out of the first mounting ring 111 and engaging with the snap-fit ​​hole 231. The other end of the first positioning rod 32 extends out of the mounting sleeve and is fixed to a first pull ring 33. A first elastic element 34 is disposed inside the mounting sleeve. One end of the first elastic element 34 is fixed to a protruding ring on the first positioning rod 32, and the other end is fixed to the inner wall of the mounting sleeve on the side away from the first mounting ring 111. At this point, when it is necessary to install the sample storage tube 1 on the turntable 23, insert the sample storage tube 1 into the outer sleeve 2, pull the first pull ring 33 to move the first positioning rod 32 away from the first mounting ring 111, the first elastic element 34 is compressed, and the first mounting ring 111 is sleeved on the outer periphery of the turntable 23. Release the first pull ring 33, and the first positioning rod 32 moves towards the first mounting ring 111 under the reset action of the first elastic element 34 and is inserted into the corresponding snap-fit ​​hole 231, thus realizing the installation between the sample storage tube 1 and the outer sleeve 2.

[0030] The sample storage tube 1 has at least one inlet 12 on its peripheral wall, and the outer tube 2 has a guide port 24 that cooperates with the inlet 12. Further, an arc-shaped guide plate 241 is provided on one side of the guide port 24. During sampling, the outer tube 2 can be rotated, and the soil is introduced into the guide port 24 through the arc-shaped guide plate 241, and then enters the sample storage tube 1 through the inlet 12. A second positioning structure 4 for aligning the inlet 12 and the guide port 24 is provided between the mounting plate 11 and the support plate 22. By limiting the relative position between the sample storage tube 1 and the outer tube 2 through the second positioning structure 4, the alignment or offset of the guide port 24 on the outer tube 2 and the inlet 12 on the sample storage tube 1 can be achieved. The second positioning structure 4 includes an alignment positioning hole 221 and a staggered positioning hole 222 provided on the support plate 22. The mounting plate 11 is provided with a second mounting sleeve 41. A second positioning rod 42 is movably provided inside the second mounting sleeve 41. The upper end of the second positioning rod 42 movably passes through the second mounting sleeve 41 and is fixed to the second pull ring 43. The lower end movably passes through the mounting plate 11 and cooperates with the alignment positioning hole 221 or the staggered positioning hole 222. A second elastic element 44 is provided inside the second mounting sleeve 41. One end of the second elastic element 44 is fixed to the second protruding ring 421 on the second positioning rod 42, and the other end is fixed to the inner wall of the second mounting sleeve 41 on the side away from the mounting plate 11. At this time, when it is necessary to align the inlet 12 and the guide port 24, pulling the second pull ring 43 drives the second positioning rod 42 to move away from the support plate 22, allowing the sample storage tube 1 and the outer tube 2 to rotate. At this time, the second elastic element 44 is compressed. Then, rotating the sample storage tube 1 causes the second positioning rod 42 to rotate to the alignment positioning hole 221. Under the reset action of the second elastic element 44, the second positioning rod 42 is inserted into the alignment positioning hole 221, locking the relative position of the sample storage tube 1 and the outer tube 2. This achieves the alignment of the inlet 12 and the guide port 24, facilitating the passage of soil. The feed inlet 24 enters the storage tube from the feed inlet 12. When it is necessary to separate the feed inlet 12 and the feed inlet 24, the second pull ring 43 is pulled to move the second positioning rod 42 away from the alignment positioning hole 221 and disengage it from the alignment positioning hole 221. The second elastic element 44 is compressed again. After rotating the sample storage tube 1, the second positioning rod 42 is rotated around the circumference of the sample storage tube 1 to correspond to the misaligned positioning hole 222. Under the action of the second elastic element 44, the second positioning rod 42 is inserted into the misaligned positioning hole 222 to lock the relative position between the sample storage tube 1 and the outer tube 2.

[0031] In some embodiments, the system further includes a base 5, on which a frame 51 is mounted, and a mounting seat 52 is movably mounted on the frame 51. The base 5 is used to place the mounting seat 52 on the ground, and the mounting seat 52 is raised and lowered by a lifting mechanism 6. The lifting mechanism 6 includes a first motor 61 and a screw 62 fixed to the output end of the first motor 61. The upper and lower ends of the screw 62 are rotatably connected to the frame 51. The screw 62 is threadedly engaged with the mounting seat 52, and the mounting seat 52 is slidably engaged with the frame 51 through a sliding hole 521. The sliding engagement between the mounting seat 52 and the frame 51 prevents the mounting seat 52 from rotating. The first motor 61 drives the screw 62 to rotate, causing the mounting seat 52 to move up and down, which in turn causes the outer sleeve 2 on the mounting seat 52 to move up and down.

[0032] The mounting base 52 is provided with a second mounting ring 53 for mounting the outer sleeve 2 via a bearing. A clamping block 532 is provided on the inner wall of the second mounting ring 53 via a spring piece 533. When the outer sleeve is inserted into the second mounting ring 53, the clamping block 532 presses it against the outer surface of the outer sleeve, fixing the outer sleeve inside the second mounting ring 53. Further, the outer wall of the outer sleeve 2 is provided with a positioning arc-shaped groove 25 that mates with the clamping block 532. The positioning arc-shaped groove 25 extends along the circumferential direction of the outer sleeve 2. One side of the positioning arc-shaped groove 25 smoothly transitions with the outer wall of the outer sleeve 2, while the other side is recessed towards the center of the outer sleeve 2 to form a stop surface 251. For example, the positioning arc groove 25 is arranged clockwise along the circumference of the outer sleeve 2 from the side where it smoothly transitions to the outer wall of the outer sleeve 2 to the side of the stop surface 251. When the outer sleeve 2 is inserted into the second mounting ring 53, the outer sleeve 2 can be rotated clockwise, so that the clamping block 532 enters the positioning arc groove 25 from the side where it smoothly transitions to the outer sleeve 2 and abuts against the stop surface 251. At this time, the outer sleeve 2 can no longer rotate clockwise relative to the second mounting ring 53, so that when the second mounting ring 53 rotates clockwise, it drives the outer sleeve 2 to rotate synchronously. When it is necessary to remove the outer sleeve from the second mounting ring 53, the outer sleeve is rotated counterclockwise, so that the clamping block 532 slides out of the positioning arc groove 25 from the smooth transition section, and the outer sleeve can be pulled out from the second mounting ring 53.

[0033] The mounting base 52 is equipped with a drive mechanism 7 for rotating the outer sleeve 2. This allows the outer sleeve 2 and the sample storage tube 1 on the mounting base 52 to move up and down synchronously. Simultaneously, the drive mechanism 7 drives the outer sleeve 2 to rotate, causing it to either enter or exit the soil. The drive mechanism 7 includes a second motor 71 and a drive gear 72 fixed to the output end of the second motor 71. The second mounting ring 53 has a toothed ring 531 that meshes with the drive gear 72. In this configuration, the second motor 71 drives the drive gear 72 to rotate, which in turn drives the toothed ring 531 to rotate, which in turn drives the second mounting ring 53 to rotate. The second mounting ring 53 then drives the outer sleeve to rotate, penetrating into the soil.

[0034] In use, the base 5 is placed on the ground, and the sample storage tube 1 is inserted into the outer sleeve. The first positioning structure 3 secures the sample storage tube 1 onto the outer sleeve 2, and the second positioning structure 4 offsets the inlet 12 on the sample storage tube 1 from the guide port 24 on the outer sleeve. The outer sleeve is then inserted into the second mounting ring 53 on the mounting base 52, and the clamping block 532 secures the outer sleeve in the second mounting ring 53. The lifting mechanism 6 is activated, causing the mounting base 52 to move downwards, which in turn moves the outer sleeve downwards. Simultaneously, the drive mechanism 7 drives the outer sleeve to rotate, drilling it into the soil. The second positioning structure 4 allows relative rotation between the sample storage tube 1 and the outer sleeve. Rotating the sample storage tube 1 aligns the guide port 24 with the inlet 12, allowing soil sampling. After sampling, the guide port 24 and the inlet 12 can be offset again to protect the soil inside the sample storage tube 1. Finally, the lifting mechanism 6 moves the mounting base 52 upwards, pulling the outer sleeve out of the soil. Then, the first positioning structure 3 is used to remove the sample storage tube 1 from the outer tube 2 to obtain the sampled soil.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A surface runoff soil sampling device for cultivated land, characterized in that, It includes a sample storage tube (1) and an outer sleeve (2) fitted onto the sample storage tube (1). The outer sleeve (2) has an open upper end and a tapered portion (21) at the lower end. A support plate (22) is provided on the outer sleeve (2). A turntable (23) located on the upper side of the support plate (22) is movably mounted on the outer sleeve (2) via a bearing. The turntable (23) has at least one snap-fit ​​hole (231) in its circumferential direction. The sample storage tube (1) is closed at the bottom and open at the top. The sample storage tube (1) is provided with a mounting plate (11) located on the upper side of the turntable (23). The bottom of the mounting plate (11) is provided with a first mounting ring (111) that can be sleeved on the turntable (23). The first mounting ring (111) is provided with a first positioning structure (3) that cooperates with the snap-fit ​​hole (231). The sample storage tube (1) has at least one inlet (12) on its peripheral wall, and the outer tube (2) has a guide port (24) that cooperates with the inlet (12). A second positioning structure (4) for aligning the inlet (12) and the guide port (24) is provided between the mounting plate (11) and the support plate (22).

2. The surface runoff farmland soil sampling device according to claim 1, characterized in that, The first positioning structure (3) includes a first mounting sleeve (31) disposed on a first mounting ring (111). A first positioning rod (32) is movably disposed inside the mounting sleeve, one end of which protrudes from the first mounting ring (111) and cooperates with the snap-fit ​​hole (231). The other end of the first positioning rod (32) protrudes from the mounting sleeve and is fixed to a first pull ring (33). A first elastic element (34) is disposed inside the mounting sleeve. One end of the first elastic element (34) is fixed to a protruding ring on the first positioning rod (32), and the other end is fixed to the inner wall of the mounting sleeve on the side away from the first mounting ring (111).

3. The surface runoff farmland soil sampling device according to claim 1, characterized in that, The second positioning structure (4) includes an alignment positioning hole (221) and a staggered positioning hole (222) provided on the support plate (22). The mounting plate (11) is provided with a second mounting sleeve (41). A second positioning rod (42) is movably provided inside the second mounting sleeve (41). The upper end of the second positioning rod (42) movably passes through the second mounting sleeve (41) and is fixed with the second pull ring (43). The lower end movably passes through the mounting plate (11) and cooperates with the alignment positioning hole (221) or the staggered positioning hole (222). A second elastic element (44) is provided inside the second mounting sleeve (41). One end of the second elastic element (44) is fixed with the second protruding ring (421) on the second positioning rod (42), and the other end is fixed with the inner wall of the second mounting sleeve (41) away from the mounting plate (11).

4. The surface runoff farmland soil sampling device according to claim 1, characterized in that, It also includes a base (5), on which a frame (51) is provided, and a mounting seat (52) is movably provided on the frame (51). The mounting seat (52) is raised and lowered by a lifting mechanism (6). A second mounting ring (53) for mounting the outer tube (2) is provided on the mounting seat (52) via a bearing. A clamping block (532) is provided on the inner wall of the second mounting ring (53) via a spring piece (533). A driving mechanism (7) for driving the outer tube (2) to rotate is provided on the mounting seat (52).

5. The surface runoff farmland soil sampling device according to claim 4, characterized in that, The outer wall of the outer sleeve (2) is provided with a positioning arc groove (25) that cooperates with the clamping block (532). The positioning arc groove (25) extends along the circumferential direction of the outer sleeve (2). One side of the positioning arc groove (25) smoothly transitions with the outer wall of the outer sleeve (2), and the other side is recessed toward the center of the outer sleeve (2) to form a stop surface (251).

6. The surface runoff farmland soil sampling device according to claim 4, characterized in that, The lifting mechanism (6) includes a first motor (61) and a screw (62) fixed to the output end of the first motor (61). The screw (62) is threadedly engaged with the mounting base (52), and the mounting base (52) is slidably engaged with the frame (51) through a sliding hole (521).

7. The surface runoff farmland soil sampling device according to claim 4, characterized in that, The drive mechanism (7) includes a second motor (71) and a drive gear (72) fixed to the output end of the second motor (71). The second mounting ring (53) is provided with a toothed ring (531) that meshes with the drive gear (72).

8. The surface runoff farmland soil sampling device according to claim 1, characterized in that, The upper end of the sample storage tube (1) is provided with a cap (8), and the cap (8) is threadedly connected to the sample storage tube (1).

9. The surface runoff farmland soil sampling device according to claim 1, characterized in that, The outer side of the conical part (21) is provided with helical blades (211).

10. The surface runoff farmland soil sampling device according to claim 1, characterized in that, An arc-shaped guide plate (241) is provided on one side of the feed inlet (24).

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