A soil sampling and testing device and method

Abstract

This invention discloses a soil sampling and testing device and method, belonging to the technical field of sampling equipment. It includes a mounting frame and multiple casters. Multiple mounting plates are slidably connected to the mounting frame, and a first connecting cylinder is fixedly connected to the end of each mounting plate. A mounting ring is fixedly connected to the top of the first connecting cylinder, and a sampling cylinder is mounted on the mounting ring. Multiple sampling cylinders arranged circumferentially enable efficient multi-point synchronous soil sampling. The positions of the multiple sampling cylinders can be adjusted by meshing gears and racks in the adjustment mechanism, allowing for adjustment of the position of each sampling cylinder according to the sampling point. Simultaneously, under the action of pulleys and transmission belts, all sampling cylinders can be driven to move synchronously. This avoids the inefficient operation of repeatedly moving equipment required for traditional single-point sampling and solves the cumbersome problem of independently adjusting the positions of multiple cylinders.

Description

Technical Field

[0001] This invention relates to the field of sampling equipment technology, specifically a soil sampling and testing device and method. Background Technology

[0002] In agriculture, environmental monitoring, geological exploration, and other fields, soil sampling is a crucial step in obtaining data on soil physicochemical properties and pollution status. However, existing soil sampling equipment generally suffers from the following problems:

[0003] (1) Low efficiency of single-point sampling: Traditional equipment mostly uses a single sampling tube, which requires repeated movement of the equipment to complete multi-point sampling, which is time-consuming and labor-intensive;

[0004] (2) Inflexible position adjustment: In multi-tube sampling equipment, the position of each sampling tube usually needs to be adjusted independently, which is cumbersome and difficult to adapt to complex terrain or differentiated sampling needs quickly.

[0005] (3) Insufficient automation: The disassembly and replacement of the sampling tubes rely heavily on manual operation, and the sampling completion status cannot be detected in real time, resulting in interruption of the sampling process or sample overflow;

[0006] Therefore, the present invention provides a soil sampling and testing device and method to solve the above problems. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] This invention provides a soil sampling and testing device and method, aiming to solve the problems mentioned in the background art.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, the present invention provides the following technical solution: a soil sampling and testing device, comprising a mounting frame and multiple casters, wherein multiple mounting plates are slidably connected to the mounting frame, a first connecting cylinder is fixedly connected to the end of each mounting plate, a mounting ring is fixedly connected to the top of the first connecting cylinder, a sampling cylinder is mounted on the mounting ring, a spiral blade is provided inside the first connecting cylinder, and an adjustment mechanism is provided between each of the multiple mounting plates and the mounting frame, the adjustment mechanism comprising symmetrically arranged gears and racks, wherein the gears and racks mesh;

[0011] Multiple mounting blocks are evenly fixed on the outer wall of the sampling tube. Each mounting block and the mounting ring is provided with a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a snap-fit ​​block and a fourth spring. The top of the sampling tube is threadedly connected to a tube cover. A feedback mechanism is provided between the tube cover and the sampling tube. The feedback mechanism includes a circular plate, a second spring, and a metal ball.

[0012] As a preferred technical solution of this application, the two gears are rotatably connected in the mounting frame through a rotating shaft, the two racks are fixedly connected to the mounting plate, two pulleys are coaxially fixed between the two gears, a transmission belt is connected between two adjacent pulleys, and multiple guide posts are rotatably connected in the mounting frame, with the transmission belt abutting against the guide posts.

[0013] As a preferred technical solution of this application, a plurality of slots are evenly provided in the side wall of the mounting ring, and the locking block is engaged in the slot. The mounting block is provided with a mounting groove, and the locking block is slidably connected in the mounting groove. A connecting plate and an electromagnet are fixedly connected in the mounting groove.

[0014] As a preferred technical solution of this application, the locking mechanism further includes a round rod and an iron sheet. One end of the round rod is fixedly connected to the locking block, and the other end of the round rod slides through the connecting plate and is fixedly connected to the iron sheet. The fourth spring is sleeved on the round rod, and both ends of the fourth spring are fixedly connected to the locking block and the connecting plate, respectively.

[0015] As a preferred technical solution of this application, metal plates are fixedly connected to both the sampling cylinder and the cylinder cover, and the two metal plates abut against each other. The electromagnet is electrically connected to the metal plate on the sampling cylinder. A cavity is opened inside the cylinder cover, and metal blocks are symmetrically fixed inside the cavity. The metal blocks are electrically connected to the metal plates on the cylinder cover. The metal ball is disposed in the cavity. A connecting rod is fixedly connected to the top of the circular plate. The top of the connecting rod slides into the cavity and is fixedly connected to the metal ball. The second spring is sleeved on the connecting rod, and the two ends of the second spring are fixedly connected to the metal ball and the inner wall of the cavity, respectively.

[0016] As a preferred technical solution of this application, a guide plate is fixedly connected to the upper part of the mounting ring, and multiple baffles are rotatably connected to the bottom of the sampling cylinder. A torsion spring is fixedly connected between the multiple baffles and the sampling cylinder. A first connecting groove is opened in the mounting ring, and a third spring is fixedly connected in the first connecting groove. A top plate is fixedly connected to the top of the third spring.

[0017] As a preferred technical solution of this application, a connecting block is provided below the guide plate, and the connecting block is fixedly connected to the first connecting cylinder. The spiral blade is rotatably connected to the bottom of the connecting block. A second motor is fixedly connected inside the connecting block, and the output end of the second motor is coaxially fixed with the spiral blade. A second connecting groove is opened in the side wall of the first connecting cylinder. A first spring is fixedly connected inside the second connecting groove. The bottom end of the first spring is fixedly connected to the second connecting cylinder, and the second connecting cylinder is slidably connected inside the second connecting groove.

[0018] As a preferred technical solution of this application, a first motor is fixedly connected to the top of the mounting frame, the output end of the first motor is coaxially fixed with a gear, multiple handles are fixedly connected to the side wall of the mounting frame, and multiple electro-hydraulic rods are fixedly connected to the bottom of the mounting frame, with the output ends of the electro-hydraulic rods rotatably connected to the casters.

[0019] A method for using a soil sampling and testing device includes the following testing steps:

[0020] Step 1: Move the sampling cylinder to the designated sampling position, start the first motor to drive the coaxial fixed gear and pulley to rotate, and under the action of the transmission belt, drive multiple gears to rotate synchronously, and then drive multiple mounting plates to move synchronously through multiple meshing racks, thereby adjusting the position of multiple sampling cylinders;

[0021] Step 2: When sampling the soil, the soil enters the sampling cylinder through the guide plate. When the sampling cylinder is full, the soil pushes the circular plate upward. The circular plate causes the metal ball to abut against the metal block, thus closing the circuit. At this time, the electromagnet in the locking mechanism is energized and becomes magnetic. The electromagnet attracts the iron plate and abuts against it. The iron plate drives the locking block to move out of the locking slot, releasing the locking block from limiting the sampling cylinder. At this time, the compressed third spring resets and pushes the top plate upward. The top plate lifts the sampling cylinder, realizing the disassembly of the sampling cylinder.

[0022] (III) Beneficial Effects

[0023] 1. This invention can efficiently achieve multi-point synchronous sampling of soil by using multiple sampling tubes arranged in a circle. The position of multiple sampling tubes can be adjusted by adjusting the meshing gears and racks in the adjustment mechanism. The position of each sampling tube can be adjusted according to the sampling point. At the same time, under the action of pulleys and transmission belts, all sampling tubes can be driven to move synchronously. This not only avoids the inefficient operation of repeatedly moving the equipment in traditional single-point sampling, but also solves the cumbersome problem of independent adjustment of the position of multiple tubes.

[0024] 2. This invention uses a locking block in the locking mechanism to fix the sampling cylinder above the spiral blade. During operation, the guide plate pushes open the baffle at the bottom of the sampling cylinder, allowing the soil transported by the spiral blade to smoothly enter the sampling cylinder. When the soil fills the sampling cylinder, the soil will push the metal ball in the feedback mechanism to trigger the locking mechanism to operate, driving the locking block to release the limit on the sampling cylinder, thereby realizing the automatic disassembly of the sampling cylinder, completing the entire sampling process, and simplifying the operation process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a soil sampling and testing device and method.

[0026] Figure 2 This is a schematic diagram of the installation of a transmission belt in a soil sampling and testing device and method;

[0027] Figure 3 A soil sampling and testing device and method Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a cross-sectional view of the mounting frame in a soil sampling and testing device and method.

[0029] Figure 5 A soil sampling and testing device and method Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 This is a schematic diagram of the installation of a sampling tube in a soil sampling and testing device and method;

[0031] Figure 7 A cross-sectional view of the sampling tube in a soil sampling and testing device and method;

[0032] Figure 8 A soil sampling and testing device and method Figure 7 Enlarged view of point C in the middle;

[0033] Figure 9 A soil sampling and testing device and method Figure 7 Enlarged view of point D in the middle.

[0034] In the picture:

[0035] 1. Mounting bracket; 2. Handle; 3. Electro-hydraulic rod; 4. Caster wheel; 5. Mounting plate; 6. Mounting ring; 7. First connecting cylinder; 8. Second connecting cylinder; 9. Sampling cylinder; 10. Cylinder cover; 11. Drive belt; 12. Gear; 13. Pulley; 14. Rack; 15. Guide column; 16. First motor; 17. Mounting block; 18. Guide plate; 19. Connecting block; 20. Spiral blade; 21. Second motor; 22. First spring; 23. Metal sheet; 24. Metal block; 25. Metal ball; 26. Connecting rod; 27. Second spring; 28. Circular plate; 29. ​​Baffle; 30. Torsion spring; 31. Top plate; 32. Third spring; 33. Slot; 34. Locking block; 35. Round rod; 36. Fourth spring; 37. Connecting plate; 38. Iron sheet; 39. Electromagnet. Detailed Implementation

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] This invention provides a soil sampling and testing device, such as... Figures 1-9 As shown, the technical solution includes a mounting frame 1 and multiple casters 4. Multiple mounting plates 5 are slidably connected to the mounting frame 1. A first connecting cylinder 7 is fixedly connected to the end of the mounting plate 5. A mounting ring 6 is fixedly connected to the top of the first connecting cylinder 7. A sampling cylinder 9 is mounted on the mounting ring 6. A spiral blade 20 is provided inside the first connecting cylinder 7. An adjustment mechanism is provided between the multiple mounting plates 5 and the mounting frame 1. The adjustment mechanism includes symmetrically arranged gears 12 and racks 14. The gears 12 and racks 14 mesh. Multiple sampling cylinders 9 arranged in a circle can efficiently achieve multi-point synchronous sampling of soil. The position of multiple sampling cylinders 9 can be adjusted according to the sampling point by adjusting the meshing gears 12 and racks 14 in the adjustment mechanism.

[0039] Multiple mounting blocks 17 are evenly fixed on the outer wall of the sampling cylinder 9. Each mounting block 17 is connected to the mounting ring 6 by a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a snap-fit ​​block 34 and a fourth spring 36. The top of the sampling cylinder 9 is threadedly connected to a cylinder cover 10. A feedback mechanism is provided between the cylinder cover 10 and the sampling cylinder 9. The feedback mechanism includes a circular plate 28, a second spring 27, and a metal ball 25. The sampling cylinder 9 is fixed above the spiral blade 20 by the snap-fit ​​block 34 in the snap-fit ​​mechanism. When the soil fills the sampling cylinder 9, the soil will push the metal ball 25 in the feedback mechanism to trigger the snap-fit ​​mechanism to operate, driving the snap-fit ​​block 34 to release the limit on the sampling cylinder 9, thereby realizing the automatic disassembly of the sampling cylinder 9.

[0040] To illustrate, the spiral blade 20 consists of a drive shaft and spiral-shaped conveying blades disposed on the outer surface of the drive shaft. The top end of the drive shaft is fixedly connected to the output shaft of the second motor 21 via a coupling. The bottom of the spiral blade 20 is flush with the bottom of the second connecting cylinder 8, so that when the second connecting cylinder 8 extends out of the first connecting cylinder 7 without the first spring 22 being subjected to external force, the spiral blade 20 can be accommodated within the second connecting cylinder 8. Furthermore, the outer wall of the spiral blade 20 is in contact with the inner walls of both the first connecting cylinder 7 and the second connecting cylinder 8, allowing soil to be placed between the spiral blade 20 and the inner walls of both cylinders. The soil particles fall into the gap between the cylinders 8; as the second connecting cylinder 8 is gradually inserted into the soil, it will gradually contract into the inner wall of the first connecting cylinder 7 due to soil resistance. At this time, the spiral blade 20 will be inserted into the soil and driven to rotate. The spiral blade 20 uses the cutting force generated by the rotation to break the soil structure. At the same time, the axial thrust is formed by the tilt angle of the spiral surface, so that the stripped soil gets an upward component force and moves upward along the gap of the conveying blade. The broken soil particles are conveyed upward along the spiral path of the blade, avoiding the soil from falling back or blocking during the sampling process, and finally being collected.

[0041] Reference Figures 2-5As shown, two gears 12 are rotatably connected to the mounting frame 1 via a rotating shaft. Two racks 14 are fixedly connected to the mounting plate 5. Two pulleys 13 are coaxially fixed between the two gears 12. The two racks 14 are symmetrically arranged inside the mounting plate 5 and located on the same side of the mounting plate 5. A transmission belt 11 is connected between two adjacent pulleys 13. Multiple guide posts 15 are rotatably connected inside the mounting frame 1, and the transmission belt 11 abuts against the guide posts 15. A first motor 16 is fixedly connected to the top of the mounting frame 1. The output end of the first motor 16 is coaxially fixed to the gears 12. Multiple handles 2 are fixedly connected to the side wall of the mounting frame 1. Multiple electric hydraulic rods 3 are fixedly connected to the bottom of the mounting frame 1, and the output end of the electric hydraulic rods 3 is rotatably connected to the universal wheel 4. It should be noted that the first motor 16 is a servo motor, and its output end can achieve forward and reverse rotation by changing the direction of the current.

[0042] In use, the first motor 16 is started to drive the coaxial fixed gear 12 and pulley 13 to rotate. Under the action of the transmission belt 11, multiple gears 12 are driven to rotate synchronously, which in turn drives multiple mounting plates 5 to move synchronously through multiple meshing racks 14, thereby adjusting the position of multiple sampling cylinders 9. This not only avoids the inefficient operation of repeatedly moving the equipment in traditional single-point sampling, but also solves the cumbersome problem of independent adjustment of multiple cylinder positions.

[0043] Reference Figure 6 , Figure 7 and Figure 9 As shown, the mounting ring 6 has multiple slots 33 evenly distributed inside its sidewall, and the locking block 34 is engaged in the slots 33. The mounting block 17 has an installation groove, and the locking block 34 is slidably connected in the installation groove. The installation groove is fixedly connected to the connecting plate 37 and the electromagnet 39. The locking mechanism also includes a round rod 35 and an iron plate 38. One end of the round rod 35 is fixedly connected to the locking block 34, and the other end of the round rod 35 slides through the connecting plate 37 and is fixedly connected to the iron plate 38. The fourth spring 36 is sleeved on the round rod 35, and both ends of the fourth spring 36 are fixedly connected to the locking block 34 and the connecting plate 37, respectively. The top of the mounting ring 6 has multiple limiting grooves and multiple slots. 33 is respectively opened on the side wall of multiple limiting grooves. When the mounting block 17 is engaged in the limiting groove, one end of the locking block 34 extends through to the outside of the mounting block 17, and the inclined surface of the locking block 34 spans the limiting groove. When the mounting block 17 moves down, the inclined surface of the locking block 34 can contact the top side of the limiting groove. When installing the sampling cylinder 9, the sampling cylinder 9 is inserted into the mounting ring 6. At this time, the mounting ring 6 squeezes the inclined surface of the locking block 34, so that the locking block 34 compresses the fourth spring 36 and retracts into the mounting groove. When the locking block 34 and the locking groove 33 are opposite each other, the compressed fourth spring 36 pushes the locking block 34 into the locking groove 33, thereby limiting the sampling cylinder 9.

[0044] Reference Figure 7 and Figure 8As shown, metal plates 23 are fixedly connected to both the sampling cylinder 9 and the cylinder cover 10, and the two metal plates 23 abut against each other. The electromagnet 39 is electrically connected to the metal plates 23 on the sampling cylinder 9. A cavity is opened inside the cylinder cover 10, and metal blocks 24 are symmetrically fixed inside the cavity. The metal blocks 24 are electrically connected to the metal plates 23 on the cylinder cover 10. A metal ball 25 is placed inside the cavity. A connecting rod 26 is fixedly connected to the top of the circular plate 28. The top of the connecting rod 26 slides into the cavity and is fixedly connected to the metal ball 25. A second spring 27 is sleeved on the connecting rod 26, and the two ends of the second spring 27 are fixedly connected to the metal ball 25 and the inner wall of the cavity, respectively. After the cylinder cover 10 is installed on the sampling cylinder 9, the metal plates 23 on the cylinder cover 10 abut against the metal plates 23 on the sampling cylinder 9. At this time, the metal blocks 24 are electrically connected to the electromagnet 39. When the metal ball 25 abuts against the two metal blocks 24, the circuit connecting the electromagnet 39 is closed.

[0045] Reference Figure 7 and Figure 9 As shown, a guide plate 18 is fixedly connected to the upper part of the mounting ring 6, and multiple baffles 29 are rotatably connected to the bottom of the sampling cylinder 9. Each baffle 29 is fixedly connected to a torsion spring 30. A first connecting groove is provided inside the mounting ring 6, and a third spring 32 is fixedly connected within the first connecting groove. A top plate 31 is fixedly connected to the top of the third spring 32. When the sampling cylinder 9 is mounted on the mounting ring 6, the sampling cylinder 9 presses against the top plate 31 to compress the third spring 32, while the guide plate 18 pushes the baffles 29 to rotate. A connecting block 19 is provided below the guide plate 18, and the connecting block 19 is fixedly connected to the first connecting cylinder 7. The spiral blade 20 is rotatably connected to... The bottom of the connecting block 19 is tapered at both the top and bottom, and there is a sufficient gap between the connecting block 19 and the first connecting cylinder 7. The connecting block 19 is fixed to the first connecting cylinder 7 by multiple prismatic prisms, which can reduce the resistance of soil passing through the connecting block 19 and facilitate soil passage. A second motor 21 is fixedly connected inside the connecting block 19, and the output end of the second motor 21 is coaxially fixed with the spiral blade 20. A second connecting groove is opened in the side wall of the first connecting cylinder 7, and a first spring 22 is fixedly connected in the second connecting groove. The bottom end of the first spring 22 is fixedly connected to the second connecting cylinder 8, and the second connecting cylinder 8 is slidably connected in the second connecting groove.

[0046] Working principle: In use, the second motor 21 is started to drive the spiral blade 20 to rotate, and simultaneously the electro-hydraulic rod 3 is started to move the mounting frame 1 downward, so that the rotating spiral blade 20 is inserted into the soil. The second motor 21 provides rotational force to the spiral blade 20. While the spiral blade 20 is rotating, the electro-hydraulic rod 3 provides a vertically downward driving force to the spiral blade 20. The rotating spiral blade 20 can generate a ring shear force, which can break the soil into loose clods. Under the action of the electro-hydraulic rod 3, the spiral blade 20 can be inserted into the soil. The first spring 22 is compressed and retracted into the first connecting cylinder 7. With the continuous rotation of the spiral blade 20, the decomposed soil clods are lifted along the axial direction of the spiral blade 20. The soil clods move upwards, gradually approaching the guide plate 18. As the amount of rising soil gradually increases, the soil transported by the uppermost spiral blade 20 is compressed and passes through the guide plate 18 into the sampling cylinder 9. Because the guide plate 18 is a conical truncated pyramid with a hollow interior and a through-hole design, it can push open the baffle 29 while ensuring normal soil passage. When the soil fills the sampling cylinder 9, as... As the soil continues to accumulate, it applies pressure to the circular plate 28, pushing it upwards. The circular plate 28 causes the metal ball 25 to abut against the metal block 24, closing the circuit. At this time, the electromagnet 39 in the locking mechanism is energized and becomes magnetic. The electromagnet 39 attracts the iron plate 38, causing it to abut against the plate. The iron plate 38 then moves the locking block 34 out of the slot 33, releasing the locking block 34 from its position on the sampling cylinder 9. The magnetic attraction between the electromagnet 39 and the iron plate 38 is greater than the elastic force generated by the fourth spring 36, ensuring that the electromagnet 39 can move the locking block 34 out of the slot 33. At this time, the pressure... The third spring 32, when retracted, pushes the top plate 31 upward, which in turn lifts the sampling cylinder 9. The torsion spring 30 then drives the baffle 29 to reset, sealing the bottom of the sampling cylinder 9 and enabling automatic disassembly of the sampling cylinder 9. This completes the entire sampling process and simplifies the operation. The baffle 29 is triangular in shape. When multiple baffles 29 are reset under the action of the torsion spring 30, they can form a closed square. A protrusion is provided at the connection between the sampling cylinder 9 and the baffle 29 to restrict the downward rotation of the baffle 29 and prevent the soil inside the sampling cylinder 9 from deflecting due to gravity.

[0047] It should be noted that the electromagnet 39 is a device that generates electromagnetic fields when energized. A conductive winding matching its power is wound around the outside of the iron core. This current-carrying coil has magnetism like a magnet. The electromagnet 39, the first motor 16, and the second motor 21 are all connected to an external power source via wires. The external power source includes a battery for providing power to the electromagnet 39, the first motor 16, and the second motor 21, and a control switch for controlling their start and stop. The external power source and the electromagnet 39 are existing technologies. The specific model specifications of the first motor 16 and the second motor 21 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts existing technology in this field, so it will not be described in detail.

[0048] Example 2

[0049] Based on Example 1, this embodiment proposes a method for using a soil sampling and testing device, including the following testing steps:

[0050] Step 1: Move the sampling cylinder 9 to the designated sampling position, start the first motor 16 to drive the coaxial fixed gear 12 and pulley 13 to rotate, and under the action of the transmission belt 11, drive multiple gears 12 to rotate synchronously, and then drive multiple mounting plates 5 to move synchronously through multiple meshing racks 14, thereby adjusting the position of multiple sampling cylinders 9.

[0051] Step 2: When sampling the soil, the soil enters the sampling cylinder 9 through the guide plate 18. When the sampling cylinder 9 is full, the soil pushes the circular plate 28 upward. The circular plate 28 drives the metal ball 25 to abut against the metal block 24, thus closing the circuit. At this time, the electromagnet 39 in the locking mechanism is energized and becomes magnetic. The electromagnet 39 attracts the iron plate 38 and abuts against it. The iron plate 38 drives the locking block 34 to move out of the locking slot 33, releasing the locking block 34 from limiting the sampling cylinder 9. At this time, the compressed third spring 32 resets and pushes the top plate 31 upward. The top plate 31 lifts the sampling cylinder 9, realizing the disassembly of the sampling cylinder 9.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A soil sampling and testing device, comprising a mounting frame (1) and multiple casters (4), characterized in that: Multiple mounting plates (5) are slidably connected to the mounting frame (1). A first connecting cylinder (7) is fixedly connected to the end of the mounting plate (5). A mounting ring (6) is fixedly connected to the top of the first connecting cylinder (7). A sampling cylinder (9) is installed on the mounting ring (6). A spiral blade (20) is provided inside the first connecting cylinder (7). An adjustment mechanism is provided between the multiple mounting plates (5) and the mounting frame (1). The adjustment mechanism includes symmetrically arranged gears (12) and racks (14). The gears (12) and racks (14) mesh. Multiple mounting blocks (17) are evenly fixed on the outer wall of the sampling tube (9). Each mounting block (17) is connected to the mounting ring (6) by a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a snap-fit ​​block (34) and a fourth spring (36). The top of the sampling tube (9) is threadedly connected to a tube cover (10). A feedback mechanism is provided between the tube cover (10) and the sampling tube (9). The feedback mechanism includes a circular plate (28), a second spring (27), and a metal ball (25). The mounting ring (6) has multiple slots (33) evenly distributed in the side wall, and the locking block (34) is locked in the slot (33). The mounting block (17) has an installation groove, and the locking block (34) is slidably connected in the installation groove. The installation groove is fixedly connected to the connecting plate (37) and the electromagnet (39). The snap-fit ​​mechanism also includes a round rod (35) and an iron sheet (38). One end of the round rod (35) is fixedly connected to the snap block (34), and the other end of the round rod (35) slides through the connecting plate (37) and is fixedly connected to the iron sheet (38). The fourth spring (36) is sleeved on the round rod (35), and both ends of the fourth spring (36) are fixedly connected to the snap block (34) and the connecting plate (37) respectively. Metal plates (23) are fixedly connected to both the sampling cylinder (9) and the cylinder cover (10), and the two metal plates (23) abut against each other. The electromagnet (39) is electrically connected to the metal plate (23) on the sampling cylinder (9). A cavity is opened inside the cylinder cover (10). Metal blocks (24) are symmetrically fixed inside the cavity. The metal blocks (24) are electrically connected to the metal plate (23) on the cylinder cover (10). The metal ball (25) is set inside the cavity. A connecting rod (26) is fixedly connected to the top of the circular plate (28). The top of the connecting rod (26) slides into the cavity and is fixedly connected to the metal ball (25). The second spring (27) is sleeved on the connecting rod (26), and the two ends of the second spring (27) are fixedly connected to the metal ball (25) and the inner wall of the cavity, respectively.

2. The soil sampling and testing equipment according to claim 1, characterized in that: The two gears (12) are rotatably connected in the mounting frame (1) via a rotating shaft. The two racks (14) are fixedly connected to the mounting plate (5). Two pulleys (13) are coaxially fixed between the two gears (12). A transmission belt (11) is connected between two adjacent pulleys (13). Multiple guide posts (15) are rotatably connected in the mounting frame (1), and the transmission belt (11) abuts against the guide posts (15).

3. The soil sampling and testing equipment according to claim 1, characterized in that: A guide plate (18) is fixedly connected to the upper part of the mounting ring (6), and multiple baffles (29) are rotatably connected to the bottom of the sampling cylinder (9). A torsion spring (30) is fixedly connected between the multiple baffles (29) and the sampling cylinder (9). A first connecting groove is opened in the mounting ring (6), and a third spring (32) is fixedly connected in the first connecting groove. A top plate (31) is fixedly connected to the top of the third spring (32).

4. The soil sampling and testing equipment according to claim 3, characterized in that: A connecting block (19) is provided below the guide plate (18), and the connecting block (19) is fixedly connected to the first connecting cylinder (7). The spiral blade (20) is rotatably connected to the bottom of the connecting block (19). A second motor (21) is fixedly connected inside the connecting block (19), and the output end of the second motor (21) is coaxially fixed with the spiral blade (20). A second connecting groove is provided in the side wall of the first connecting cylinder (7). A first spring (22) is fixedly connected inside the second connecting groove. A second connecting cylinder (8) is fixedly connected to the bottom end of the first spring (22), and the second connecting cylinder (8) is slidably connected inside the second connecting groove.

5. A soil sampling and testing device according to claim 1, characterized in that: The top of the mounting bracket (1) is fixedly connected to a first motor (16), the output end of the first motor (16) is fixedly coaxially with the gear (12), a plurality of handles (2) are fixedly connected to the side wall of the mounting bracket (1), and a plurality of electric hydraulic rods (3) are fixedly connected to the bottom of the mounting bracket (1), and the output end of the electric hydraulic rods (3) is rotatably connected to the caster wheel (4).

6. A method of using the soil sampling and testing equipment as described in any one of claims 1-5, characterized in that, The following testing steps are included: Step 1: Move the sampling cylinder (9) to the designated sampling position, start the first motor (16) to drive the coaxial fixed gear (12) and pulley (13) to rotate, and under the action of the transmission belt (11), drive multiple gears (12) to rotate synchronously, and then drive multiple mounting plates (5) to move synchronously through multiple meshing racks (14), thereby adjusting the position of multiple sampling cylinders (9); Step 2: When sampling the soil, the soil enters the sampling tube (9) through the guide plate (18). When the soil fills the sampling tube (9), the soil pushes the circular plate (28) to move upward. The circular plate (28) drives the metal ball (25) to abut against the metal block (24), so that the circuit is closed. At this time, the electromagnet (39) in the snap-fit ​​mechanism is energized and has magnetism. The electromagnet (39) attracts the iron piece (38) to abut against it. The iron piece (38) drives the snap-fit ​​block (34) to move out of the snap-fit ​​slot (33), releasing the snap-fit ​​block (34) from the sampling tube (9). At this time, the compressed third spring (32) resets and pushes the top plate (31) to move upward. The top plate (31) lifts the sampling tube (9) to realize the disassembly of the sampling tube (9).

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