Soil sampling drilling machine and sampling method

Abstract

The invention relates to a soil sampling drilling machine and a sampling method. The soil sampling drilling machine comprises a sampling pipe, a friction wheel, a rocker handle and a vehicle body, the sampling pipe is arranged on the vehicle body in a penetrating manner and can move under the driving of a friction wheel, and the friction wheel is connected with a rocker handle; the sampling method comprises the following steps: adjusting the friction wheel to be horizontal through the rocker handle, driving the sampling pipe to rotate horizontally through the friction wheel, grinding the soil surface, and breaking weathered and hardened surface soil; the friction wheel is adjusted to be inclined / vertical from the horizontal state through the rocker handle, and the sampling pipe is driven by the friction wheel to horizontally rotate and drill downwards / vertically drill downwards; the friction wheel is adjusted to be reversely inclined / reversely vertical through the rocker handle, the sampling pipe is driven by the friction wheel to reversely and horizontally rotate and ascend / vertically ascend, soil in the sampling pipe is moved to the surface layer, and collection work is completed. Compared with the prior art, the device is portable to move and easy to operate, and the sampling efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil remediation and investigation, and in particular to a soil sampling drill and a sampling method. Background Art

[0002] As the demand for accurate identification and detailed characterization in the field of soil environmental investigation and remediation continues to increase, small and lightweight sampling equipment can solve the problem of limited space collection of large equipment and ensure the representativeness and accuracy of the sampling points. At present, the mainstream sampling method of soil environmental investigation is still based on the system point distribution method, which brings huge challenges to the actual on-site sampling work. For some enterprises' self-investigations of non-standardized soil environmental conditions and scientific research institutions' experimental research on soil pollutants, if large G-probes and other hydraulic drilling tools are still used for drilling, it will seriously affect the collection efficiency, reduce the number of samples for experimental research, and be detrimental to the development of scientific research. Therefore, soil collection equipment urgently needs to be lightweight and portable to improve on-site work efficiency and sampling accuracy.

[0003] Patent CN117054145A discloses a layered soil sampling and testing device, which can collect samples in sections for different soil layers and is also a new vertical collection method. However, the bottom of the device is equipped with a support frame that occupies a large area, and the device components are complex, which is not suitable for on-site light collection. In addition, the device mainly drills downward by direct push and vibration of the motor, which makes it more difficult to collect samples from harder soil layers and lacks flexible control capabilities.

[0004] Patent CN218844297U discloses a soil treatment drill, which is driven by a motor to drill downwards. At the same time, support components are arranged around the drill to ensure the stability of the drill. The drill can stand upright by itself without the need for manual support, making sample collection more portable. However, the drill still relies on the direct push method during drilling, and there is no lateral rotation auxiliary drilling process, which greatly increases the difficulty of drilling into the soil layer. Summary of the invention

[0005] The purpose of the present invention is to provide a soil sampling drill and a sampling method, and the device is portable.

[0006] The object of the present invention can be achieved by the following technical scheme: A soil sampling drill comprises a sampling tube, a friction wheel, a rocker handle and a body;

[0007] The sampling tube is passed through the vehicle body and can move under the drive of the friction wheel, and the friction wheel is connected with a rocker handle.

[0008] Preferably, the friction wheel is rotatably arranged on a fork frame, and the fork frame is connected to the rocker handle via an operating shaft.

[0009] Further preferably, the operating shaft is rotatably arranged on the vehicle body through a triangular bracket with a bearing, one end of the operating shaft is fixedly connected to the fork frame, and the other end is vertically fixedly connected to the rocker handle, and the rocker handle is perpendicular to the friction wheel axis and parallel to the friction wheel disc.

[0010] Preferably, the friction wheel is a rubber friction wheel, and its bearing has a built-in hub motor capable of driving the friction wheel to rotate;

[0011] Further preferably, a supporting wheel is arranged opposite to the friction wheel, and the distance between the inner diameter of the supporting wheel and the outer rubber ring of the rubber friction wheel is just enough to clamp the sampling tube.

[0012] More preferably, the supporting wheel is rotatably arranged on the vehicle body through a triangular support frame, and includes an intermediate wheel body and edge wheel bodies arranged on both sides of the intermediate wheel body, and the intermediate wheel body is the inner diameter of the supporting wheel.

[0013] Preferably, the distance between the inner diameter of the support wheel and the outer rubber ring of the rubber friction wheel (i.e., the distance between the middle wheel body and the edge of the outer rubber ring of the rubber friction wheel) is defined as z, the outer diameter of the sampling tube is d, and 2.5mm≥dz≥1.5mm.

[0014] Further preferably, the friction wheel comprises a stainless steel wheel disc and an external rubber ring.

[0015] Further preferably, a battery pack for supplying power to the hub motor is provided on the vehicle body.

[0016] More preferably, the battery pack is arranged on the connecting side of the base and the vertical plate, and is located between the angle formed by the base and the vertical plate.

[0017] Preferably, the sampling tube adopts an aluminum tube body, and an annularly distributed inverted wedge-shaped units are provided at the bottom.

[0018] Further preferably, the wedge-shaped unit is made of a first-grade steel material having a higher hardness than the aluminum tube body.

[0019] Preferably, the vehicle body comprises a base and a friction wheel driving box disposed on the base.

[0020] Further preferably, a positioning cone is provided at the bottom of the base.

[0021] Further preferably, a laterally retractable pedal is provided on the base.

[0022] Further preferably, the sampling tube can pass through the friction wheel drive box and the base and extend into the soil.

[0023] Further preferably, the friction wheel is located inside the friction wheel driving box, and the rocker handle is located outside the friction wheel driving box.

[0024] More preferably, the triangular bracket with the bearing is arranged inside the friction wheel driving box.

[0025] More preferably, the support wheel is welded to the inner wall of the friction wheel driving box through a triangular bracket.

[0026] Further preferably, the vehicle body further comprises a vertical plate connected to the base at an angle, and wheels are arranged at the lower part of the vertical plate.

[0027] More preferably, a handrail is provided on the upper portion of the vertical plate.

[0028] More preferably, an anti-sway ring is provided on the outer side of the sampling tube, and the anti-sway ring is connected to the vertical plate through two connecting rods arranged at an angle.

[0029] Further preferably, the upper and lower parts of the friction wheel driving box are provided with clamping bearings, and the top of the clamping bearing is a cup-shaped steel ring, which is nested in a ball bearing of equivalent size.

[0030] More preferably, the cup-shaped steel ring is in a trumpet shape that is larger at the top and smaller at the bottom.

[0031] Preferably, the soil sampling drill further comprises a control component, and the control component is connected to the hub motor.

[0032] Further preferably, the control component includes a PLC controller.

[0033] A soil sampling method, performed using the soil sampling drill, comprises the following steps:

[0034] S1: Move the vehicle body to the designated location;

[0035] S2: insert the sampling tube into the vehicle body;

[0036] S3: Use the rocker handle to adjust the friction wheel to a horizontal position, and use the friction wheel to drive the sampling tube to rotate horizontally, so as to grind the soil surface and break the weathered and hardened topsoil;

[0037] S4: The friction wheel is adjusted from horizontal to inclined / vertical through the rocker handle, and the friction wheel drives the sampling tube to rotate horizontally and drill downward / drill vertically downward;

[0038] S5: Adjust the friction wheel to reverse tilt / reverse vertical through the rocker handle, drive the sampling tube to reverse horizontal rotation and rise / vertically rise through the friction wheel, move the soil in the sampling tube to the surface, and complete the collection work.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The device of the present invention is portable, easy to operate, and can improve sampling efficiency;

[0041] 2. The present invention can adjust the ratio of soil breaking strength and drilling strength, and significantly improve the drilling efficiency of soil layers with different physical and chemical properties;

[0042] 3. The present invention drives and adjusts the movement mode of the sampling tube through the friction wheel and the rocker handle, which is simple to operate and can improve the sampling efficiency. The equipment components are simple and do not require a supporting chassis with a large floor space. It is portable and suitable for on-site light collection.

[0043] 4. The present invention adjusts the contact angle between the friction wheel and the sampling tube to make the sampling tube rotate horizontally or rotate while drilling downward or rising, thereby achieving flexible regulation. In addition, the inverted wedge-shaped unit design at the bottom of the sampling tube can reduce the difficulty of collecting hard soil layers.

[0044] 5. The invention has a simple structure, is easy to manufacture, has good versatility, and is conducive to small-scale experimental research and pilot tests;

[0045] 6. The present invention provides a portable soil sampling drill for small-scale / pilot-scale soil experiments, which can be used to collect soil from representative points for small-scale experiments or pilot-scale experiments, and is suitable for collecting sticky soil in the field without cement floors. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a partial structural schematic diagram of the soil sampling drill of the present invention;

[0047] Figure 2 This is a schematic diagram of the friction wheel of the present invention driving the sampling tube to move downward;

[0048] Figure 3 This is a schematic diagram of the friction wheel of the present invention driving the sampling tube to rotate horizontally and drill downward;

[0049] Figure 4 The overall structure of the soil sampling drill of the present invention is shown in FIG. Figure 1 ;

[0050] Figure 5 The overall structure of the soil sampling drill of the present invention is shown in FIG. Figure 2 ;

[0051] Figure 6 This is a demonstration diagram of the soil sampling drill in the mobile state of the present invention;

[0052] Figure 7 This is a working state operation demonstration diagram of the soil sampling drill of the present invention;

[0053] Figure 8 It is a schematic diagram of the installation of the hub motor of the present invention;

[0054] Fig. 9 This is a schematic diagram of the cooperation between the supporting wheel and the friction wheel of the present invention;

[0055] In the figure: 1-sampling tube, 2-friction wheel, 21-hub motor, 3-rocker handle, 4-body, 41-base, 42-friction wheel drive box, 43-positioning cone, 44-retractable pedal, 45-vertical plate, 46-wheel, 5-fork frame, 6-control shaft, 7-triangular bracket, 71-bracket bearing, 8-support wheel, 9-battery pack, 10-anti-sway ring, 11-clamping bearing. DETAILED DESCRIPTION

[0056] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0057] Example 1

[0058] A soil sampling drill, such as Figure 1 As shown, it includes a sampling tube 1, a friction wheel 2, a rocker handle 3 and a vehicle body 4.

[0059] The sampling tube 1 is vertically penetrated on the vehicle body 4 , and the friction wheel 2 is connected to the rocker handle 3 , which can change the contact angle with the sampling tube 1 and drive the sampling tube 1 to move.

[0060] Specifically, Figure 2 As shown, when the friction wheel 2 and the sampling tube 1 are also vertically arranged, the sampling tube 1 can be driven to drill vertically downwards, as shown in FIG. Figure 3 As shown, when the friction wheel 2 and the sampling tube 1 are arranged at an angle, the sampling tube 1 can be driven to rotate horizontally and drill downward.

[0061] Example 2

[0062] A soil sampling drill, such as Figures 4-5 As shown, the sampling tube 1 adopts an aluminum tube body, and an annularly distributed inverted wedge-shaped units are provided at the bottom. The material of the wedge-shaped units is a first-grade steel with higher hardness than the aluminum tube body.

[0063] The vehicle body 4 includes a base 41, a friction wheel driving box 42, a positioning cone 43, a retractable pedal 44, a vertical plate 45, and wheels 46. A positioning cone 43 is provided at the bottom of the base 41, a horizontal retractable pedal 44 is provided on the base 41, the vertical plate 45 is connected to the base 41 at an angle, a wheel 46 is provided at the lower part of the vertical plate 45, and a handrail is provided at the upper part. The friction wheel driving box 42 is provided on the base 41, and the sampling tube 1 can pass through the friction wheel driving box 42 and the base 41 of the vehicle body 4 and extend into the soil.

[0064] The friction wheel 2 is arranged in the friction wheel driving box 42, and is a rubber friction wheel, including a stainless steel wheel disc and an external rubber ring, and the bearing of the stainless steel wheel disc is built with a hub motor 21. The friction wheel 2 is rotatably arranged on a fork frame 5, and the fork frame 5 is connected to the rocker handle 3 outside the friction wheel driving box 42 through an operating shaft 6. The operating shaft 6 is passed through a triangular bracket 7 with a bracket bearing 71, and the triangular bracket 7 is fixed in the friction wheel driving box 42.

[0065] A supporting wheel 8 is also provided in the friction wheel driving box 42. The friction wheel 2 and the supporting wheel 8 are arranged opposite to each other on both sides of the sampling tube 1 to clamp the sampling tube 1. The supporting wheel 8 is installed in the friction wheel driving box 42 through another triangular bracket.

[0066] A pair of clamping bearings 11 are also provided at the upper and lower parts of the friction wheel driving housing 42 , and the sampling tube 1 can pass through the clamping bearings 11 and rotate freely.

[0067] An anti-sway ring 10 is also sleeved on the sampling tube 1 above the friction wheel driving box 42 , and the anti-sway ring 10 is connected to the vertical plate 45 via two connecting rods arranged at an angle.

[0068] A lithium battery pack 9 for providing power to the hub motor 21 is also provided on the base 41 .

[0069] The rest is the same as Example 1.

[0070] Example 3

[0071] A portable soil sampling drill comprises a supporting wheel 8, a clamping bearing 11, a rubber friction wheel 2, a hub motor 21, a bearing (bracket bearing 71), a fork frame 5, an operating shaft 6, a triangular bracket 7 and an operating rocker (rocker handle 3), etc. The supporting wheel 8, the triangular bracket 7, the bearing (bracket bearing 71) and the clamping bearing 11 are mainly stable components of the drill, wherein the supporting wheel 8 and the clamping bearing 11 are used to fix the sampling tube 1 to keep it in a plumb state. The triangular bracket 7 and the bearing (bracket bearing 71) can effectively fix the rubber friction wheel 2, the operating rocker and other integrated castings. The clamping bearing 11 is connected with a ball bearing to ensure that the sampling tube 1 can rotate freely. The cup ring can be more conducive to the accurate access of the sampling tube 1, and at the same time has a clamping effect on the sampling tube. The hub motor 21 is the main driving component, which provides power for the friction wheel 2, and promotes the sampling tube 1 to rotate horizontally or drill and lift longitudinally.

[0072] The collection process and collection mechanism of the sampler are as follows:

[0073] The drill is moved by holding the handle of the side wall (vertical plate 45) and rotating the vehicle body. At this time, the pedal (retractable pedal 44) can be retracted vertically. After reaching the designated position, the positioning cone 43 of the vehicle body bottom plate (base 41) is used to fix the entire drill. At this time, the pedal is put down, and the grip of the sampling vehicle is further strengthened by the human's own gravity. At the same time, the wheel hub motor 21 is started to perform drilling work.

[0074] When the drilling rig is drilling, the friction wheel 2 can freely adjust the angle by operating the rocker. When the ground is hard, the rocker can be placed horizontally in advance. At this time, the friction wheel 2 is also in a horizontal state, driving the sampling tube 1 to rotate. The downward speed of the sampling tube 1 is 0, but the horizontal linear speed reaches the maximum value. Combined with the sawtooth at the bottom of the sampling tube 1, the surface layer is broken to reduce the hardness of the soil surface. Then the inclination angle is continuously increased to make the sampling tube 1 slowly drill downward.

[0075] After drilling is completed, the joystick is rotated in the opposite direction to move the sampling tube 1 upwards, and the soil collected in the tube is taken out.

[0076] Example 4

[0077] A portable soil sampling drill comprises an aluminum sampling tube 1, an anti-sway ring 10, a lithium battery pack 9, an adjustable torsion bar handle (rocker handle 3), a base 41, a retractable pedal 44, a friction wheel 2, a positioning cone 43, a wheel 46 and a drive motor box (friction wheel drive box 42).

[0078] Specifically:

[0079] A rubber friction wheel 2 with a freely changeable shear direction is arranged inside the driving motor box, which is connected by a fork frame 5 and fixed to the transverse bearing, and the tail is connected to a joystick (joystick handle 3) that can be adjusted forward and backward. The joystick handle 3 is perpendicular to the axis of the friction wheel 2 and parallel to the wheel disc. The bearing of the rubber friction wheel 2 is built with a lithium battery hub motor.

[0080] The bottom of the aluminum sampling tube 1 is provided with annularly distributed inverted wedge-shaped units, and the material of the wedge-shaped units is a first-grade steel material with higher hardness than the aluminum tube body.

[0081] The anti-sway ring 10 is in the shape of a tripod, and the two bottoms of the tripod are welded to the side wall of the sampling device. The installation height of the anti-sway ring 10 is about 2 / 3 of the height of the side wall.

[0082] The torsion bar handle, the fork frame 5 and the top bearing of the triangular bracket 7 are integrally cast, and the overall material is stainless steel. The top of the fork frame 5 is connected to the stainless steel wheel disc of the rubber friction wheel 2.

[0083] The hub motor is built into the rubber friction wheel 2 bearing to provide the main driving force for the drilling rig. The motor uses a lithium battery driven DC motor.

[0084] A set of stabilizing components is also arranged inside the box, including a steel clamping bearing 11, a supporting wheel 8, and a triangular bracket 7 with a bearing.

[0085] The clamping bearing 11 is divided into two parts, an upper part and a lower part, which are respectively installed in the upper part and the lower part of the driving motor housing. The top of the clamping bearing 11 is a cup-shaped steel ring, which is nested in a ball bearing of equivalent size.

[0086] The supporting wheel 8 and the rubber friction wheel 2 and other components are placed in alignment, and the left end triangular bracket is directly welded to the side wall of the motor box. The distance between the inner diameter of the supporting wheel 8 and the outer rubber ring of the rubber friction wheel 2 can just clamp the sampling tube 1.

[0087] The tail of the fork frame 5 is connected to the control rocker through a triangular bracket 7 with a bearing, and the bottom of the triangular bracket is welded to the bottom surface of the motor box.

[0088] A sampling method and process of a portable soil sampling drill, using the portable soil sampling drill, comprises the following steps:

[0089] S1: Moving state. Put away the pedal, tilt the sampling drill 45 degrees, and use the bottom wheels to move the drill to the designated location (such as Figure 6 shown).

[0090] S2: Stake out. Turn the drill back to the vertical position at the designated point, and the bottom positioning cone can be inserted into the soil to stabilize the sampler. Insert the aluminum sampling tube into the upper clamping bearing outside the drive motor box, and then pass through the motor and fall into the lower clamping bearing to prepare for sampling.

[0091] S3: Breaking the soil state. Turn the torsion bar handle to the horizontal position, and the friction wheel is in a horizontal state. Turn on the lithium battery hub motor built into the friction wheel bearing, and the sampling tube body rotates horizontally around the axis under the traction of the friction wheel. The wedge-shaped serrations at the bottom of the sampling tube grind the soil surface to break the weathered and hardened topsoil;

[0092] S4: Drilling state. Slowly turn the adjustment torsion bar from horizontal to vertical position, and change the horizontal rotation of the pipe and the force of downward drilling by changing the partial pressure ratio of the friction wheel in the horizontal and vertical directions. The angle can be freely adjusted according to the physical and chemical properties of different soil layers in the actual site, such as hardness, viscosity, etc., to complete the drilling process (such as Figure 7 shown).

[0093] S5: Collection. Turn the handle to -0 to -90 degrees, and the collection tube will rotate in the opposite direction and gradually rise, moving the soil in the tube to the surface, completing the collection work.

[0094] Example 5

[0095] A portable soil sampling drill, the rubber friction wheel 2 includes: Figure 8The driving wheel shown and the stainless steel wheel disc and the external rubber ring arranged in sequence on the outer ring of the driving wheel, the driving wheel is rotatably connected to the fork frame 5 through a bearing, wherein the inner ring (fixed axis) of the bearing of the driving wheel is integrally connected to the fork frame 5 and the hub motors 21 are built-in on both sides of the inner ring of the bearing and are equipped with lithium batteries for power supply. If necessary, external wires can also be used for power supply. The outer ring of the bearing is connected to the stainless steel wheel disc and the external rubber ring.

[0096] Specifically, the hub motor 21 is connected to the driving wheel through a coupling, and the radial and angular deviations are 0. The hub motor 21 with fixed axes on both sides drives the middle driving wheel to rotate, and then drives the stainless steel wheel disc and the external rubber ring on the outer ring to rotate, that is, the hub motor 21 can drive the friction wheel 2 to rotate on the fork frame 5.

[0097] And, if Fig. 9 As shown, the rubber friction wheel 2 and the supporting wheel 8 are arranged opposite to each other on both sides of the sampling tube 1, and the distance between the middle wheel body of the supporting wheel 8 and the edge of the outer rubber ring of the rubber friction wheel 2 is slightly smaller than the outer diameter of the sampling tube, so that the rubber friction wheel 2 and the supporting wheel 8 can stably clamp the sampling tube 1.

[0098] The rest is the same as Example 4.

[0099] The present invention can provide a portable collection device structure and use scheme for experimental research and small / pilot tests in the field of soil environmental investigation and soil pollution remediation. The main structure of the present invention is similar to a "trolley". Its small and light characteristics can greatly reduce transportation pressure, improve sample collection efficiency, and further increase the quality and quantity of soil collection points. In addition, since the friction wheel that provides the core power can rotate 360 ​​degrees freely, the collection intensity or speed of the sampling tube can be flexibly adjusted, and typical, fast, and portable sampling can be achieved with the assistance of other stable components.

[0100] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A soil sampling drill, characterized in that: It comprises a sampling tube (1), a friction wheel (2), a rocker handle (3) and a vehicle body (4); The sampling tube (1) is passed through the vehicle body (4) and can move under the drive of the friction wheel (2), and the friction wheel (2) is connected to a rocker handle (3).

2. The soil sampling drill according to claim 1, characterized in that: The friction wheel (2) is rotatably arranged on a fork frame (5), and the fork frame (5) is connected to the rocker handle (3) via an operating shaft (6).

3. The soil sampling drill according to claim 2, characterized in that: The operating shaft (6) is rotatably arranged on the vehicle body (4) via a triangular bracket (7) with a bearing, one end of the operating shaft (6) is fixedly connected to the fork frame (5), and the other end is vertically fixedly connected to the rocker handle (3), and the rocker handle (3) is perpendicular to the friction wheel axis and parallel to the friction wheel disc.

4. The soil sampling drill according to claim 1, characterized in that: The friction wheel (2) is a rubber friction wheel and is provided with a hub motor (21) capable of driving the friction wheel (2) to rotate; A supporting wheel (8) is arranged opposite to the friction wheel (2), and the supporting wheel (8) and the outer rubber ring of the rubber friction wheel clamp the sampling tube (1); The vehicle body (4) is provided with a battery pack (9) for supplying power to the wheel hub motor (21).

5. The soil sampling drill according to claim 1, characterized in that: The sampling tube (1) adopts an aluminum tube body, and is provided with annularly distributed inverted wedge-shaped units at the bottom. The material of the wedge-shaped units is a first-grade steel material with a higher hardness than that of the aluminum tube body.

6. The soil sampling drill according to claim 1, characterized in that: The vehicle body (4) comprises a base (41) and a friction wheel driving box (42) arranged on the base (41); The bottom of the base (41) is provided with a positioning cone (43), and the base (41) is provided with a laterally retractable pedal (44); The sampling tube (1) can pass through the friction wheel driving box (42) and the base (41) and extend into the soil; The friction wheel (2) is located inside the friction wheel driving box (42), and the rocker handle (3) is located outside the friction wheel driving box (42).

7. The soil sampling drill according to claim 6, characterized in that: The vehicle body (4) further comprises a vertical plate (45) connected to the base (41) at an angle, and a wheel (46) is arranged at the lower part of the vertical plate (45) and a handrail is arranged at the upper part.

8. The soil sampling drill according to claim 7, characterized in that: The sampling tube (1) is sleeved with an anti-sway ring (10) on the outside, and the anti-sway ring (10) is connected to the vertical plate (45) via two connecting rods arranged at an angle.

9. The soil sampling drill according to claim 6, characterized in that: The upper and lower parts of the friction wheel driving box (42) are provided with clamping bearings (11), and the top of the clamping bearing (11) is a cup-shaped steel ring, which is nested on a ball bearing of equivalent size.

10. A soil sampling method, characterized in that: The method is carried out using the soil sampling drill according to any one of claims 1 to 9, comprising the following steps: S1: Move the vehicle body (4) to a designated location; S2: inserting the sampling tube (1) onto the vehicle body (4); S3: The friction wheel (2) is adjusted to a horizontal position by means of a rocker handle (3), and the friction wheel (2) drives the sampling tube (1) to rotate horizontally, thereby grinding the soil surface and breaking up the weathered and hardened topsoil; S4: adjusting the friction wheel (2) from horizontal to inclined / vertical through the rocker handle (3), and driving the sampling tube (1) to rotate horizontally and drill downward / drill vertically through the friction wheel (2); S5: The friction wheel (2) is adjusted to reverse tilt / reverse vertical by the rocker handle (3), and the friction wheel (2) drives the sampling tube (1) to reverse horizontal rotation and rise / vertically rise, so that the soil in the sampling tube (1) is moved to the surface layer, and the collection work is completed.

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