Anti-falling soil taking device and method of using the same

Abstract

The application provides a soil sampling device and a method thereof, and relates to the technical field of geotechnical engineering investigation and detection equipment. The soil sampling device comprises a support, a propelling driving mechanism, a rotating driving device, a drill rod and a hollow drill bit, and further comprises a turnover control mechanism and a spherical block with an outer diameter matched with the inner diameter of the drill bit. The spherical block is arranged in the drill bit and is rotationally connected with the drill bit through connecting shafts fixed on both sides of the spherical block in the radial direction of the drill bit. One side of the spherical block is provided with a groove to form a sampling cavity. The turnover control mechanism is connected with the connecting shafts to drive the connecting shafts to rotate around the axis of the connecting shafts. The application can better ensure the soil sampling effect and the sampling efficiency.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering investigation and testing equipment technology, specifically to a fall-proof soil sampling device and its usage method. Background Technology

[0002] With the rapid development of science and technology, geotechnical engineering investigation plays an increasingly important role in engineering construction. Soil sampling is frequently required in geotechnical engineering investigations, and it is crucial to minimize soil damage during sampling. However, existing soil sampling devices typically use drill bits. After sampling, soil samples can easily fall out of the drill bit's internal cavity during withdrawal, affecting sampling effectiveness and efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a soil sampling device and its method of use that can prevent soil samples from falling out of the soil sampler.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a soil sampling device for preventing falling, including a support, a propulsion drive mechanism, a rotary drive device, a drill rod and a hollow drill bit. The support is provided with a slide platform that is vertically slidably connected to the support. The drill rod is arranged below the slide platform along the sliding direction of the slide platform and one end is rotatably connected to the slide platform, and the other end is connected to the drill bit. The rotary drive device is installed on the slide platform and is drivenly connected to the drill rod. The propulsion drive mechanism is connected to the slide platform to drive the slide platform to slide. It also includes a flipping control mechanism and a spherical block with an outer diameter adapted to the inner diameter of the drill bit.

[0005] The spherical block is disposed inside the drill bit and is rotatably connected to the drill bit via connecting shafts fixed on both sides of the spherical block along the radial direction of the drill bit. A groove is provided on one side of the spherical block to form a sampling cavity.

[0006] The flipping control mechanism is connected to the connecting shaft to drive the connecting shaft to rotate about the axis of the connecting shaft.

[0007] Furthermore, the flipping control mechanism includes a linear drive device, a connecting rod, and a rack. The linear drive device is mounted on the slide table. The rack is slidably disposed within the side wall of the drill bit along the axial direction of the drill rod and meshes with the connecting shaft via a gear. The connecting rod is disposed at the center of the drill rod along the axial direction of the drill rod and slides with the drill rod. One end of the connecting rod is rotatably connected to the linear drive device, and the other end is fixedly connected to the rack via a crossbar.

[0008] Furthermore, the crossbar is installed inside the drill bit, and the other end of the connecting rod extends into the drill bit and is fixedly connected to the crossbar. A soil retaining plate is provided below the crossbar.

[0009] Furthermore, the propulsion drive mechanism includes a propulsion drive device, a lead screw, and a nut that cooperates with the lead screw. The lead screw is fixed on the bracket along the axial direction of the drill rod. The nut is rotatably connected to the slide and cooperates with the lead screw. The propulsion drive device is mounted on the slide and is drivenly connected to the nut.

[0010] Furthermore, the propulsion drive device and the rotation drive device are the same motor.

[0011] Furthermore, a dust cover is provided on the outer side of the drill bit. The dust cover is slidably mounted on the drill rod through a sliding sleeve that is slidably engaged with the drill rod, and the sliding sleeve is rotatably engaged with the drill rod.

[0012] Furthermore, ball bearings are provided between the sliding sleeve and the drill rod.

[0013] Furthermore, the bracket is equipped with a controller and an alarm. The bottom of the sampling chamber is equipped with a limiting plate that floats along the depth direction of the sampling chamber. A pressure sensor is provided between the limiting plate and the bottom of the sampling chamber. The pressure sensor is signal-connected to the controller to transmit a pressure signal to the controller. The controller is electrically connected to the alarm to control the alarm to sound an alarm based on the pressure signal.

[0014] Furthermore, a vibrator is provided on the side of the limiting plate near the bottom of the sampling chamber, and a storage battery is provided inside the spherical block, with the storage battery electrically connected to the vibrator.

[0015] The present invention also provides a method for using the above-mentioned anti-fall soil sampling device, comprising the following steps:

[0016] Step 1: Install the support frame at the soil sampling location, and use the flipping control mechanism to flip the spherical block so that the sampling chamber faces upward;

[0017] Step 2: Start the propulsion drive mechanism and rotary drive device to rotate the drill bit into the soil to the sampling depth;

[0018] Step 3: Control the spherical block to flip using the flipping control mechanism, so that the sampling chamber faces downwards;

[0019] Step 4: Continue to use the propulsion drive mechanism and rotary drive device to make the drill bit continue to rotate into the soil until the soil sample fills the sampling chamber;

[0020] Step 5: Control the spherical block to flip using the flipping control mechanism, so that the sampling chamber faces upward;

[0021] Step 6: Use the propulsion drive mechanism to withdraw the drill bit from the soil;

[0022] Step 7: Control the spherical block to flip using the flipping control mechanism, so that the sampling chamber faces downwards and the soil sample inside the sampling chamber is poured out.

[0023] The beneficial effects of the present invention are as follows: The anti-fall soil sampling device and its method of use of the present invention have a rotatable spherical block inside the drill bit. The spherical block is controlled by a flipping control mechanism. After the spherical block has taken a soil sample, the sampling chamber can be turned upward by controlling the flipping control mechanism, thereby solving the problem that the soil sample is easy to fall out of the sampling chamber, and can better ensure the soil sampling effect and sampling efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a structure of the anti-falling soil sampling device of the present invention;

[0025] Figure 2 yes Figure 1 A sectional view;

[0026] Figure 3 yes Figure 2 Enlarged view of point A;

[0027] Figure 4 This is a schematic diagram of the transmission structure;

[0028] Figure 5 This is another structural schematic diagram of the anti-falling soil sampling device of the present invention;

[0029] Figure 6 yes Figure 5 Enlarged view of point B;

[0030] Reference numerals: 1. Support bracket; 2. Propulsion drive mechanism; 3. Rotary drive device; 4. Drill bit; 5. Drill rod; 6. Tilting control mechanism; 7. Spherical block; 8. Retaining plate; 9. Dust cover; 11. Slide table; 12. Controller; 13. Alarm; 14. Slide rail; 16. Drill rod drive gear; 17. Nut drive gear; 21. Propulsion drive device; 22. Nut; 23. Lead screw; 24. Dust cover rubber sleeve; 61. Linear drive device; 62. Connecting rod; 63. Rack; 64. Crossbar; 71. Connecting shaft; 72. Sampling chamber; 73. Gear; 74. Spring; 75. Limiting plate; 76. Pressure sensor; 77. Vibrator; 78. Battery; 91. Sliding sleeve; 92. Ball bearing. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] like Figures 1 to 3As shown, an anti-fall soil sampling device of the present invention includes a support 1, a propulsion drive mechanism 2, a rotary drive device 3, a drill rod 5, and a hollow drill bit 4. The support 1 is provided with a slide 11 vertically slidably connected to the support 1. The slide 11 is specifically vertically slidably connected to the support 1 via a vertical slide rail 14. The drill rod 5 is disposed below the slide 11 along the sliding direction of the slide 11, with one end rotatably connected to the slide 11 and the other end connected to the drill bit 4. The rotary drive device 3 is mounted on the slide 11 and is drively connected to the drill rod 5. The propulsion drive mechanism 2 is connected to the slide 11 to drive the slide 11 to slide. Figure 2 , Figure 3 As shown, the device also includes a tilting control mechanism 6 and a spherical block 7 whose outer diameter is adapted to the inner diameter of the drill bit 4. The spherical block 7 is disposed inside the drill bit 4 and is rotatably connected to the drill bit 4 via connecting shafts 71 fixed on both sides of the spherical block 7 along the radial direction of the drill bit 4. A groove is provided on one side of the spherical block 7 to form a sampling chamber 72. The tilting control mechanism 6 is connected to the connecting shafts 71 to drive the connecting shafts 71 to rotate around the axis of the connecting shafts 71.

[0033] Among them, the spherical block 7 should be placed at the lower end of the drill bit 4 as much as possible, so that when the sampling chamber 72 of the spherical block 7 is facing upward, the lower end of the spherical block 7 protrudes from the lower end of the drill bit 4, so that the lower end of the spherical block 7 can play a role similar to the drill tip of the drill bit 4.

[0034] The rotary drive device 3 can be a motor or other rotary drive equipment. The rotary drive device 3 and the drill rod 5 can be connected by chain drive, belt drive, or gear drive, etc. Rollers are provided on the support to facilitate the movement of the soil sampling device. In this embodiment of the invention, the drill rod 5 is provided with graduations to facilitate understanding the drilling depth of the drill bit 4.

[0035] When using the anti-fall soil sampling device of the present invention, the spherical block 7 is first flipped by the flipping control mechanism 6, so that the sampling chamber 72 faces upward. During soil sampling, the propulsion drive mechanism 2 and the rotation drive device 3 are activated. The rotation drive device 3 drives the drill rod 5 and the drill bit 4 to rotate, and the propulsion drive mechanism 2 pushes the slide table 11 to slide, so that the drill bit 4 rotates into the soil. Since the outer diameter of the spherical block 7 is adapted to the inner diameter of the drill bit 4, the soil sample will not pass through the gap between the spherical block 7 and the inner wall of the drill bit 4 and enter the sampling chamber 72 during the above process. When the drill bit 4 rotates to the required sampling depth, the spherical block 7 is first flipped downward by the flipping control mechanism 6, so that the sampling chamber 72 faces downward. Then, the propulsion drive mechanism 2 and the rotation drive device 3 continue to drive the drill bit 4 into the soil until the sampling chamber 72 has completed sampling. When sampling is complete and the drill bit 4 needs to be withdrawn, the spherical block 7 is first flipped by the flipping control mechanism 6, causing the sampling chamber 72 to face upwards. Then, the slider is moved upwards by the propulsion drive mechanism 2, causing the drill bit 4 to exit the soil. Finally, the spherical block 7 is flipped by the flipping control mechanism 6, causing the sampling chamber 72 to face downwards, allowing the soil sample to be poured out. The anti-fall soil sampling device of this invention has a flipable spherical block 7 inside the drill bit 4. The spherical block 7 can be controlled by the flipping control mechanism 6 to turn its sampling chamber 72 upwards after sampling, thus preventing the soil sample from falling out of the sampling chamber 72, thereby ensuring the soil sampling effect and efficiency. After the drill bit exits the soil, the spherical block 7 is flipped downwards by the flipping control mechanism 6, causing the sampling chamber 72 to face downwards, allowing the soil sample to be poured out. The spherical block 71 is spherical, which makes it convenient for the spherical block to rotate during the soil sampling process. Since the sampling cavity 72 of the spherical block 71 has a convex arc at its lower end when it is facing upward, it can squeeze the soil in the middle of the drill bit 4 to the outside of the drill bit 4, thereby making it convenient for the drill bit to drill downward.

[0036] Once the drill bit 4 has reached the required sampling depth, the spherical block 7 is first rotated downwards by the flipping control mechanism 6, causing the sampling chamber 72 to face downwards. The drill bit 4 continues to rotate downwards, allowing the soil sample to enter the sampling chamber 72. When sampling is complete and the drill bit 4 needs to be withdrawn, the spherical block 7 is first rotated upwards by the flipping control mechanism 6, causing the sampling chamber 72 to face upwards. Then, the slide is moved upwards by the propulsion drive mechanism 2, pushing the drill bit out. This prevents the soil sample from falling out of the sampling chamber 72, ensuring the sampling effect and efficiency. After the drill bit withdraws from the soil, the spherical block 7 is rotated downwards again by the flipping control mechanism 6, causing the sampling chamber 72 to face downwards, allowing the soil sample to be poured out. The spherical block 71 is spherical, facilitating rotation during soil sampling. Because the lower end of the spherical block 71 is convex when the sampling chamber 72 faces upwards, it can compress the soil in the middle of the drill bit 4 towards the outside of the drill bit 4, thus facilitating downward drilling.

[0037] The flipping control mechanism 6 can be a motor installed inside the drill bit 4, which is connected to the connecting shaft 71 to control the flipping of the spherical block 7. However, since the drill bit 4 is generally small, it is difficult to install the motor inside the drill bit. Figure 2 , Figure 3 In this embodiment of the invention, the flipping control mechanism 6 includes a linear drive device 61, a connecting rod 62, and a rack 63. The linear drive device 61 is mounted on the slide table 11. The rack 63 is slidably disposed within the side wall of the drill bit 4 along the axial direction of the drill rod 4 and meshes with the connecting shaft 71 via a gear 73 disposed on the connecting shaft 71. The connecting rod 62 is disposed at the center of the drill rod 5 along the axial direction of the drill rod 5 and is slidably disposed with the drill rod 5. One end of the connecting rod 62 is rotatably connected to the linear drive device 61, and the other end is fixedly connected to the rack 63 via a crossbar 64. When it is necessary to flip the spherical block 7, the linear drive device 61 pushes the connecting rod 62 to move it upward or downward along the axial direction of the drill rod 5. The connecting rod 62 then drives the rack 63 downward or downward via the crossbar 64, causing the rack 63 to drive the connecting shaft 71 to rotate via the gear 73, thereby controlling the flipping of the spherical block 7. Since one end of the connecting rod 62 is rotatably connected to the linear drive device 61, the situation where the connecting rod 62 rotates with the drill bit 4 and causes the linear drive device 61 to rotate along with it can be avoided. The linear drive device 61 can be a cylinder, an electric push rod, etc.

[0038] The crossbar 64 can be located outside or inside the drill bit 4. However, if the crossbar 64 is located outside the drill bit 4, it can easily affect the drilling process, and the side of the drill rod 5 needs to have a hole for the connecting rod 62 to connect with the crossbar 64, allowing soil to easily enter the drill rod 5. Therefore, preferably, the crossbar 64 is located inside the drill bit 4, and the other end of the connecting rod 62 extends into the drill bit 4 and is fixedly connected to the crossbar 64. To prevent soil from affecting the sliding of the connecting rod 62 and the rack, a soil retaining plate 8 is provided below the crossbar 64. In some embodiments, the soil retaining plate 8 is also a flat plate. In the figure, the soil retaining plate 8 is arc-shaped.

[0039] like Figure 2As shown in the embodiment of the invention, the propulsion drive mechanism 2 includes a propulsion drive device 21, a lead screw 23, and a nut 22 that cooperates with the lead screw 23. The lead screw 23 is fixed on the bracket 1 along the axial direction of the drill rod 5. The nut 22 is rotatably connected to the slide table 11 and cooperates with the lead screw 23. The propulsion drive device 21 is mounted on the slide table 11 and is drively connected to the nut 22 to drive the nut 22 to rotate. When it is necessary to control the drill bit 4 to advance or retract, the propulsion drive device 21 drives the nut 22 to rotate relative to the lead screw 23, which can make the nut 22 move up and down along the lead screw. Since the nut 22 is rotatably connected to the slide table 11, the nut 22 can drive the slide table 11 to slide up and down, thereby enabling the drill bit 4 to advance or retract through the slide table 11. In some embodiments, the propulsion drive mechanism 2 also adopts a cylinder or electric push rod mounted on the bracket 1 and connected to the slide table 11 at one end. The propulsion drive device 21 can be a motor or other rotary drive equipment. The propulsion drive device 21 and the nut 22 can be specifically connected by chain drive, belt drive, or gear drive, etc.

[0040] To prevent dust from adhering to the lead screw, a retractable dustproof sleeve 24 is fitted on the lead screw.

[0041] The propulsion drive device 21 and the rotation drive device 3 may not be the same device or may be the same device. Figure 2 In this embodiment, the propulsion drive device 21 and the rotation drive device 3 use the same motor, which saves costs. When the propulsion drive device 21 and the rotation drive device 3 use the same motor, in this embodiment of the invention, as shown... Figure 4 As shown, the output shaft of the motor engages with the outer teeth of the gear ring 15, which has transmission teeth both inside and outside (the outer teeth of the gear ring 15 are not fully shown). The gear ring then drives the drill rod 5 through the drill rod drive gear 16, which is located inside the gear ring and is fixedly connected to the drill rod 5. The drill rod 5 is driven by the nut drive gear 17, which is fixedly connected to the nut 22.

[0042] like Figure 2 , Figure 5 As shown, a dust cover 9 is provided on the outer side of the drill bit 4, and a sliding sleeve 91 is fitted onto the drill rod 5, which is slidably engaged with the dust cover 9. The dust cover 9 is fixed on the sliding sleeve 91, and is thus slidably mounted on the drill rod 5 via the sliding sleeve 91, with the sliding sleeve 91 and the drill rod 5 in a rotatable engagement. In this way, during the drilling process, the dust cover 9 will move downwards along the drill rod 5 under the action of gravity and adhere to the ground, forming a protective barrier around the drilling area to prevent dust from rising. Furthermore, the dust cover 9 will not rotate with the drill rod 5, facilitating the drilling of the drill rod 5. Figure 5 In order to facilitate the sliding of the sleeve and the rotation of the drill rod, ball bearings 92 are provided between the sleeve 91 and the drill rod 5.

[0043] To facilitate timely understanding of the sampling situation, such as Figure 5 , Figure 6As shown, the bracket 1 is equipped with a controller 12 and an alarm 13. A limiting plate 75, floating along the depth direction of the sampling chamber 72, is located at the bottom of the sampling chamber 72. A pressure sensor 76 is positioned between the limiting plate 75 and the bottom of the sampling chamber 72. The pressure sensor 76 is signal-connected to the controller 12 to transmit a pressure signal. The controller 12 is electrically connected to the alarm 13 to control the alarm 13 to sound an alarm based on the pressure signal. Specifically, the limiting plate 75 can be floating at the bottom of the sampling chamber 72 via a spring 74. Since the spherical block 7 can flip, making wiring inconvenient, the pressure sensor 76 is preferably a pressure sensor with a powered wireless signal transmission mode. When the soil sample enters the sampling chamber 72, it will push the limiting plate 75 to move upward. When the limiting plate 75 moves to the set position, the limiting plate 75 will contact the pressure sensor 76, thereby transmitting pressure to the pressure sensor 76. After sensing the pressure, the pressure sensor 76 will output a pressure signal to the controller 12. After receiving the pressure signal, the controller 12 indicates that the soil sampling is completed and will send an alarm signal to the alarm 13, controlling the alarm 13 to sound, so that the operator can be informed of the soil sampling status in a timely manner.

[0044] like Figure 6 As shown, a vibrator 77 is provided on the side of the limiting plate 75 near the bottom of the sampling chamber 72, and a storage battery 78 is provided inside the spherical block 7. The storage battery 78 is electrically connected to the vibrator 77. Generally, the limiting plate 75 can be vibrated by the vibrator 77, thereby facilitating the removal of soil samples from the sampling chamber 72.

[0045] If the pressure sensor 76 does not have its own power supply, it is understood that the pressure sensor 76 needs to be electrically connected to the battery 78 in order to supply power to the pressure sensor 76.

[0046] The specific usage method of the above-mentioned anti-fall soil sampling device is as follows:

[0047] Step 1: When the soil sampling device takes a soil sample, the spherical block 7 is first flipped by the flipping control mechanism 6 so that the sampling chamber 72 faces upward.

[0048] Step 2: Start the propulsion drive mechanism 2 and the rotary drive device 3 to make the drill bit 4 rotate into the soil to the required sampling depth;

[0049] Step 3: When the drill bit 4 is screwed into the required sampling depth, the spherical block 7 is flipped downward by the flipping control mechanism 6, so that the sampling chamber 72 is downward.

[0050] Step 4: Continue to drive the drill bit 4 into the soil by using the propulsion drive mechanism 2 and the rotary drive device 3 until the soil sample fills the sampling chamber 72.

[0051] Step 5: Control the spherical block 7 to flip using the flipping control mechanism 6, so that the sampling chamber 72 faces upward;

[0052] Step 6: Move the slider upwards using the propulsion drive mechanism 2, causing the drill bit 4 to exit the soil.

[0053] Step 7: Control the spherical block 7 to flip by the flipping control mechanism 6, so that the sampling chamber 72 faces downward and pour out the soil sample in the sampling chamber 72. The sampling is completed.

Claims

1. A soil sampling device with anti-falling mechanism, comprising a support (1), a propulsion drive mechanism (2), a rotary drive device (3), a drill rod (5) and a hollow drill bit (4), wherein the support (1) is provided with a slide (11) which is vertically slidably connected to the support (1), the drill rod (5) is arranged below the slide (11) along the sliding direction of the slide (11) and one end is rotatably connected to the slide (11), and the other end is connected to the drill bit (4), the rotary drive device (3) is mounted on the slide (11) and is drivenly connected to the drill rod (5), the propulsion drive mechanism (2) is connected to the slide (11) to drive the slide (11) to slide, and further comprising a flipping control mechanism (6) and a spherical block (7) whose outer diameter is adapted to the inner diameter of the drill bit (4); The spherical block (7) is set inside the drill bit (4) and is rotatably connected to the drill bit (4) by connecting shafts (71) fixed on both sides of the spherical block (7) along the radial direction of the drill bit (4). A groove is provided on one side of the spherical block (7) to form a sampling cavity (72). The flipping control mechanism (6) is connected to the connecting shaft (71) to drive the connecting shaft (71) to rotate around the axis of the connecting shaft (71); The flipping control mechanism (6) includes a linear drive device (61), a connecting rod (62), and a rack (63). The linear drive device (61) is mounted on the slide table (11). The rack (63) is slidably disposed in the side wall of the drill bit (4) along the axial direction of the drill rod (5) and meshes with the connecting shaft (71) through a gear (73). The connecting rod (62) is disposed at the center of the drill rod (5) along the axial direction of the drill rod (5) and slides with the drill rod (5). One end of the connecting rod (62) is rotatably connected to the linear drive device (61), and the other end is fixedly connected to the rack (63) through a crossbar (64). The propulsion drive mechanism (2) includes a propulsion drive device (21), a lead screw (23), and a nut (22) that cooperates with the lead screw (23). The lead screw (23) is fixed on the bracket (1) along the axial direction of the drill rod (5). The nut (22) is rotatably connected to the slide (11) and cooperates with the lead screw (23). The propulsion drive device (21) is mounted on the slide (11) and is connected to the nut (22) in a transmission manner.

2. The anti-falling soil sampling device as described in claim 1, characterized in that, The crossbar (64) is installed inside the drill bit (4), and the other end of the connecting rod (62) extends into the drill bit (4) and is fixedly connected to the crossbar (64). A retaining plate (8) is provided below the crossbar (64).

3. The anti-falling soil sampling device as described in claim 1, characterized in that, The propulsion drive device (21) and the rotation drive device (3) are the same motor.

4. The anti-falling soil sampling device as described in claim 1, characterized in that, The drill bit (4) is provided with a dust cover (9) on its outer side. The dust cover (9) is slidably mounted on the drill rod (5) by a sliding sleeve (91) that is slidably engaged with the drill rod (5), and the sliding sleeve (91) is rotatably engaged with the drill rod (5).

5. The anti-falling soil sampling device as described in claim 4, characterized in that, Ball bearings (92) are provided between the sliding sleeve (91) and the drill rod (5).

6. The anti-falling soil sampling device as described in claim 1, characterized in that, The bracket (1) is equipped with a controller (12) and an alarm (13). The bottom of the sampling chamber (72) is provided with a limiting plate (75) that floats along the depth direction of the sampling chamber (72). A pressure sensor (76) is provided between the limiting plate (75) and the bottom of the sampling chamber (72). The pressure sensor (76) is signal-connected to the controller (12) to transmit a pressure signal to the controller (12). The controller (12) is electrically connected to the alarm (13) to control the alarm (13) to sound an alarm according to the pressure signal.

7. A soil-sampling device for preventing falling soil as described in claim 6, characterized in that, The limiting plate (75) is provided with a vibrator (77) on one side near the bottom of the sampling chamber (72), and a storage battery (78) is provided inside the spherical block (7), and the storage battery (78) is electrically connected to the vibrator (77).

8. The method of using the anti-falling soil sampling device as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1: Install the support (1) at the soil sampling position, and control the spherical block (7) to flip through the flipping control mechanism (6) so that the sampling chamber (72) faces upward; Step 2: Start the propulsion drive mechanism (2) and the rotary drive device (3) to rotate the drill bit (4) into the soil to the sampling depth; Step 3: Control the spherical block (7) to flip by the flipping control mechanism (6) so that the sampling chamber (72) faces downward; Step 4: Continue to drive the drill bit (4) into the soil by using the propulsion drive mechanism (2) and the rotation drive device (3) until the soil sample fills the sampling chamber (72). Step 5: Control the spherical block (7) to flip by the flipping control mechanism (6) so that the sampling chamber (72) faces upward; Step 6: Use the propulsion drive mechanism (2) to make the drill bit (4) exit the soil; Step 7: Control the spherical block (7) to flip by the flipping control mechanism (6) so that the sampling chamber (72) faces downward and pours out the soil sample in the sampling chamber (72).

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