A sampling device for soil health detection

Abstract

The application relates to the technical field of soil sampling equipment, and discloses a sampling device for soil health detection, which comprises a drill rod, a soil taking assembly is fixedly connected in the drill rod, the soil taking assembly comprises an inner pipe, a worm, a worm wheel and a soil taking head unit; the drill rod is hollow, the inner pipe is slidably installed in the drill rod, the worm wheel is rotatably connected in the inner pipe, the worm wheel is rotatably connected to the inner wall of the inner pipe, the worm wheel is engaged with the worm, one end of the worm is rotatably connected to the pipe wall of the inner pipe, and the other end of the worm is fixedly connected with the soil taking head unit. The application can sample soil samples of different depths at the same position at one time, improves the sampling efficiency, the soil samples of different depths are not mixed with each other, and the accuracy of the detection result in the later period is improved.

Description

Technical Field

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

[0002] Soil health refers to the soil's sustained ability to maintain vital ecosystem functions for plants, animals, and humans, linking agricultural and soil sciences with policy, stakeholder needs, and sustainable supply chain management. While past soil assessments focused on crop production, soil health now also includes the soil's role in water quality, climate change, and human health.

[0003] Patent publication number CN105547739A discloses a soil sampler, including a tube for insertion into the soil layer. A piston is installed within the tube's cavity, and a push rod is connected to the upper end of the piston. The push rod extends upwards, and its axis is parallel to the axis of the tube. A handle is provided at the upper end of the push rod for pushing the piston to slide along the tube cavity. When the piston is at its upper limit position, the upper end of the tube cavity is open to the atmosphere. This invention uses a piston structure to push the soil out of the sampling tube. The tube cavity does not need to be sealed, therefore no positive pressure is generated within the cavity. This allows for a smaller tube diameter, ultimately reducing the resistance to soil sampling and making it suitable for manual operation. Furthermore, using a piston to push the soil out ensures soil integrity and guarantees detection accuracy.

[0004] Regarding the aforementioned technologies, the inventors believe that the soil sampler can only sample soil at one depth at a time. If it is necessary to collect soil at different depths from the same location, it is necessary to collect it repeatedly, which is inefficient. Moreover, when collecting soil from the same location multiple times, the upper layer of soil may fall to the bottom of the sampling hole and mix with the lower layer of soil, causing inaccurate detection. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a sampling device for soil health testing. It solves the problem that soil samplers in the prior art can only sample soil at one depth at a time. If it is necessary to collect soil at different depths from the same location, multiple samplings are required, which is inefficient. Moreover, when sampling multiple times at the same location, the upper layer of soil may fall to the bottom of the sampling hole and mix with the lower layer of soil, causing inaccurate testing.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] The technical solution adopted by this invention to solve its technical problem is: a sampling device for soil health testing, comprising:

[0008] Drill pipe;

[0009] A soil sampling assembly is fixedly connected inside the drill rod. The soil sampling assembly includes an internal tube, a worm, a worm wheel, and a soil sampling head unit. The drill rod is hollow. The internal tube is slidably installed inside the drill rod. The worm wheel is rotatably connected inside the internal tube. The worm wheel is rotatably connected to the inner wall of the internal tube. The worm wheel and the worm mesh. One end of the worm is rotatably connected to the wall of the internal tube, and the other end of the worm is fixedly connected to the soil sampling head unit.

[0010] Specifically, the power head assembly includes a hydraulic motor, a drill rod, a first connector, and a fixed base; the output shaft at the lower end of the hydraulic motor is fixedly connected to the fixed base, the first connector is fixedly installed inside the fixed base, and the lower end of the first connector is fixedly connected to the drill rod.

[0011] Specifically, the drill rod can be divided into upper and lower parts. The lower end of the upper part of the drill rod is provided with a hollow screw rod, which is threadedly connected to a screw hole. The screw hole is opened on the upper end face of the lower part of the drill rod.

[0012] Specifically, the power head assembly is slidably connected to the moving component, and the moving component includes a tracked vehicle and a hydraulic winch; the hydraulic winch is fixedly connected to the forward end of the tracked vehicle, and the hydraulic motor is slidably connected to the hydraulic winch.

[0013] Specifically, a first slider is fixedly connected to the outer wall of the built-in tube, and the first slider is slidably connected to a first groove, which is formed inside the drill rod.

[0014] Specifically, the soil sampling head unit includes a soil sampling chamber, a crushing head, a switch, and a soil sampling port; the soil sampling chamber is located at the end of the worm gear, the bottom of the soil sampling chamber is recessed to facilitate the collection of soil, the crushing head is fixedly connected to the outside of the soil sampling chamber, the soil sampling port is located at the lowest point of the bottom of the soil sampling chamber, and the switch is installed inside the soil sampling port.

[0015] Specifically, the end of the worm gear away from the soil sampling head unit has a threaded hole inside, the threaded hole is threadedly connected to the lead screw, and the lead screw is fixedly connected to the inner wall of the built-in tube.

[0016] Specifically, one end of the worm gear passes through the internal tube and stops between the internal tube and the drill rod. The worm gear and the internal tube are fixedly connected by a bearing. A soil sampling hole is opened on the worm gear facing the drill rod. The soil sampling hole is adapted to the drill rod and is opened on the drill rod. A movable door is hinged in the soil sampling hole. A limit block is located on the side of the movable door near the worm gear. The limit block is fixedly connected to the lower wall of the soil sampling hole.

[0017] Specifically, the auxiliary components include a rack, a second slider, an opening, a second groove, a second connector, a gear, and a third groove. The second connector is fixedly connected to the upper end of the rack, and the second connector is detachably connected to the fixed base. The second slider is fixedly connected to the rack, and the second slider is slidably connected to the second groove. The second groove is formed on the opening, which is located on the upper end face of the internal tube. The rack extends into the internal tube and meshes with the gear. The gear is fixedly connected to the worm gear. The rack is slidably connected to the third groove, which is formed on the inner wall of the internal tube.

[0018] The beneficial effects of this invention are:

[0019] (1) When the rack of the present invention slides down the inner tube, it drives the gear to rotate. The gear drives the worm wheel to rotate. The rotation of the worm wheel will drive the worm to rotate. The worm will drive the soil sampling head unit to move into the soil sampling hole. When the soil sampling head unit moves, it will first squeeze open the movable door and then contact the soil outside the drill rod. Because the worm drives the soil sampling head unit to rotate, the crushing head in the soil sampling head unit will crush the soil so that the soil can fall into the soil sampling cavity.

[0020] (2) The recess at the bottom of the soil sampling chamber of the present invention can better store the soil and prevent the soil from falling off when the soil sampling unit head rotates and moves.

[0021] (3) When the worm drives the soil-collecting head unit to rotate and slide, the threaded hole inside the other end of the worm will maintain a threaded connection with the lead screw. The lead screw and the threaded hole maintain relative rotation, which plays a stabilizing role in the rotation of the worm to collect soil.

[0022] (4) The present invention removes the built-in tube from the drill rod, then places the specimen bottle under the soil sampling port, and then manually turns on the switch to let the soil sample in the soil sampling chamber fall into the specimen bottle. It should be noted that multiple specimen bottles are needed to extract soil from soil sampling chambers at different depths, and the specimen bottles at the corresponding depths are marked and recorded. Then, soil samples at different depths can be tested. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the drill rod, connector No. 1, hollow screw rod, and screw hole connection structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal connection structure of the drill pipe of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal connection structure of the drill pipe when the auxiliary component of the present invention is working;

[0028] Figure 5 This is a schematic diagram of the connection structure between the built-in tube and the rack of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure between the No. 2 connector and the rack of the present invention;

[0030] Figure 7 For the present invention Figure 2 Enlarged view of point A in the middle;

[0031] Figure 8 For the present invention Figure 3 Enlarged view of point B in the middle;

[0032] Figure 9 For the present invention Figure 4 Enlarged diagram of point C in the middle.

[0033] In the picture:

[0034] 1. Mobile components; 11. Tracked mobile vehicles; 12. Hydraulic winches;

[0035] 2. Power head assembly; 21. Hydraulic motor; 22. Drill rod; 23. Connector No. 1; 24. Hollow screw; 25. Screw hole; 26. Mounting base;

[0036] 3. Soil sampling assembly; 31. Internal tube; 32. First slider; 33. Worm gear; 34. Worm wheel; 35. Lead screw; 36. Threaded hole; 37. Soil sampling head unit; 371. Soil sampling chamber; 372. Crushing head; 373. Switch; 374. Soil sampling opening; 38. Soil sampling hole; 39. Movable door; 310. Limiting block; 311. First chute; 312. Bearing;

[0037] 4. Auxiliary components; 41. Rack; 42. Second slider; 43. Opening; 44. Second slide groove; 45. Second connector; 46. Gear; 47. Third slide groove. Detailed Implementation

[0038] This invention provides a sampling device for soil health testing, which solves the technical problem that in the prior art, soil samplers can only sample soil at one depth at a time. If it is necessary to collect soil at different depths at the same location, multiple samplings are required, which is inefficient. Moreover, when sampling multiple times at the same location, the upper layer of soil may fall to the bottom of the sampling hole and mix with the lower layer of soil, resulting in inaccurate detection.

[0039] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0040] like Figures 1-9 As shown, a sampling device for soil health testing according to the present invention is specifically implemented as follows:

[0041] Example 1:

[0042] The power head assembly 2 is slidably connected to the moving component 1. The moving component 1 includes a tracked vehicle 11 and a hydraulic winch 12. The hydraulic winch 12 is fixedly connected to the forward end of the tracked vehicle 11, and the hydraulic motor 21 is slidably connected to the hydraulic winch 12.

[0043] The power head assembly 2 includes a hydraulic motor 21, a drill rod 22, a first connector 23, and a fixed base 26; the output shaft at the lower end of the hydraulic motor 21 is fixedly connected to the fixed base 26, the first connector 23 is fixedly installed inside the fixed base 26, and the lower end of the first connector 23 is fixedly connected to the drill rod 22.

[0044] In this embodiment, the user should first drive the tracked vehicle 11 to the soil extraction location, and then operate the hydraulic winch 12 to drive the hydraulic motor 21 to move up and down. The drill rod 22 is connected to the fixed seat 26 on the hydraulic motor 21 through the first connector 23. When the hydraulic motor 21 is working, it drives the drill rod 22 to rotate. When the hydraulic winch 12 drives the hydraulic motor 21 to move down, the drill rod 22 begins to drill into the ground.

[0045] Example 2:

[0046] The drill rod 22 can be divided into upper and lower parts. The lower end of the upper part of the drill rod 22 is provided with a hollow screw 24. The hollow screw 24 is threadedly connected to a screw hole 25. The screw hole 25 is opened on the upper end face of the lower part of the drill rod 22.

[0047] A first slider 32 is fixedly connected to the outer wall of the built-in tube 31. The first slider 32 and the first slide groove 311 are slidably connected. The first slide groove 311 is formed inside the drill rod 22.

[0048] In this embodiment, the drill rod 22 is divided into upper and lower parts, which are connected by a hollow screw 24 and a screw hole 25. The user can disassemble it and slide the inner tube 31 into the drill rod 22. The first slider 32 on the outer wall of the inner tube 31 is adapted to the first sliding groove 311 inside the drill rod 22. The first slider 32 slides downward along the first sliding groove 311 to complete the installation of the inner tube 31.

[0049] Example 3:

[0050] A soil sampling assembly 3 is fixedly connected inside the drill rod 22. The soil sampling assembly 3 includes an internal tube 31, a worm gear 33, a worm wheel 34, and a soil sampling head unit 37. The drill rod 22 is hollow. The internal tube 31 is slidably installed inside the drill rod 22. The worm wheel 34 is rotatably connected inside the internal tube 31. The worm wheel 34 is rotatably connected to the inner wall of the internal tube 31. The worm wheel 34 and the worm gear 33 mesh. One end of the worm gear 33 is rotatably connected to the tube wall of the internal tube 31, and the other end of the worm gear 33 is fixedly connected to the soil sampling head unit 37.

[0051] The soil sampling head unit 37 includes a soil sampling cavity 371, a crushing head 372, a switch 373, and a soil sampling port 374. The soil sampling cavity 371 is located at the end of the worm gear 33. The bottom of the soil sampling cavity 371 is recessed to facilitate the collection of soil. The crushing head 372 is fixedly connected to the outside of the soil sampling cavity 371. The soil sampling port 374 is located at the lowest point of the bottom of the soil sampling cavity 371. The switch 373 is installed inside the soil sampling port 374.

[0052] The worm gear 33 has a threaded hole 36 at one end away from the soil sampling head unit 37. The threaded hole 36 is threadedly connected to the lead screw 35, and the lead screw 35 is fixedly connected to the inner wall of the built-in tube 31.

[0053] One end of the worm gear 33 passes through the internal tube 31 and rests between the internal tube 31 and the drill rod 22. The worm gear 33 and the internal tube 31 are fixedly connected by a bearing 312. A soil sampling hole 38 is provided on the worm gear 33 facing the drill rod 22. The soil sampling hole 38 is adapted to the drill rod 22. The soil sampling hole 38 is opened on the drill rod 22. A movable door 39 is hinged inside the soil sampling hole 38. A limiting block 310 is provided on the side of the movable door 39 near the worm gear 33. The limiting block 310 is fixedly connected to the lower wall of the soil sampling hole 38.

[0054] The auxiliary component 4 includes a rack 41, a second slider 42, an opening 43, a second groove 44, a second connector 45, a gear 46, and a third groove 47. The second connector 45 is fixedly connected to the upper end of the rack 41, and the second connector 45 is detachably connected to the fixed base 26. The second slider 42 is fixedly connected to the rack 41, and the second slider 42 is slidably connected to the second groove 44. The second groove 44 is opened on the opening 43, which is located on the upper end face of the internal tube 31. The rack 41 extends into the internal tube 31 and meshes with the gear 46. The gear 46 is fixedly connected to the worm gear 34. The rack 41 is slidably connected to the third groove 47, which is located on the inner wall of the internal tube 31.

[0055] In this embodiment, after the drill rod 22 drills into the ground, the hydraulic motor 21 stops working. The user should disassemble the first connector 23 and the fixing seat 26 at the upper end of the drill rod 22 to separate the drill rod 22 body from the hydraulic motor 21. Then, the user should disassemble the hollow screw 24 and screw hole 25 on the drill rod 22, dividing the drill rod 22 into two parts, thus exposing the upper end face of the internal tube 31 inside the drill rod 22. Then, the user should operate the hydraulic winch 12 to drive the hydraulic motor 21 to move upward a certain distance. Then, the user should install the second connector 45 on the rack 41 into the fixing seat 26 on the hydraulic motor 21 to complete the connection between the rack 41 and the hydraulic motor 21. Next, the user should operate the hydraulic winch 12 to drive the hydraulic motor 21 and the rack 41 downward, so that the rack... 41 is inserted into the internal tube 31. It is important to note that rack 41 needs to be aligned with the opening 43 at the upper end of the internal tube 31, and the second slider 42 on rack 41 needs to be aligned with the second slide groove 44. When rack 41 slides downwards inside the internal tube 31, rack 41 meshes with gear 46 inside the internal tube 31 in sequence, simultaneously driving gear 46 to rotate. The rotation of gear 46 drives worm gear 34 to rotate, which in turn drives worm 33 to rotate. Worm 33 then drives soil-collecting head unit 37 to move into soil-collecting hole 38. During this movement, soil-collecting head unit 37 first opens the movable door 39 and then contacts the soil outside drill rod 22. Because worm 33 drives soil-collecting head unit 37 to rotate, the breaking head 372 inside soil-collecting head unit 37... The soil is broken up, allowing it to fall into the soil-collecting chamber 371. The depression at the bottom of the soil-collecting chamber 371 helps to better store the soil and prevent it from falling out. Simultaneously, when the worm gear 33 rotates, the threaded hole 36 at the other end of the worm gear 33 maintains a threaded connection with the lead screw 35. The lead screw 35 and the threaded hole 36 rotate relative to each other, stabilizing the rotation of the worm gear 33 during soil collection. When the rack 41 moves downwards to its maximum position, multiple soil-collecting head units 37 have collected soil samples at different depths. At this point, the hydraulic winch 12 drives the hydraulic motor 21 and the rack 41 upwards, causing the rack 41 to detach from the internal tube 31. As the rack 41 detaches from the internal tube 31, it drives the gear 46 to rotate in the opposite direction, which in turn drives the worm wheel 34 in the opposite direction. Rotating the worm gear 34 causes the worm 33 and the soil sampling head unit 37 to retract and reset the internal tube 31. After the rack 41 is removed from the internal tube 31, the user can remove the internal tube 31 from the drill rod 22. Then, the specimen bottle is placed under the soil sampling port 374, and the switch 373 is manually turned on to allow the soil sample in the soil sampling chamber 371 to fall into the specimen bottle. It should be noted that multiple specimen bottles are needed to extract soil from the soil sampling chambers 371 at different depths, and the specimen bottles at the corresponding depths should be labeled and recorded. After the soil sample extraction is completed, the soil in all soil sampling chambers 371 should be cleaned out. Then, the internal tube 31 is reinstalled into the drill rod 22. Subsequently, the rack 41 on the hydraulic motor 21 is removed, and the upper part of the drill rod 22 is reinstalled onto the drill rod 22.The drill rod 22 is then mounted onto the mounting base 26 on the hydraulic motor 21. The hydraulic winch 12 drives the hydraulic motor 21 upwards, pulling the drill rod 22 out of the ground, allowing for the next soil extraction operation.

[0056] During operation, the user should first drive the tracked vehicle 11 to the soil extraction location, and then operate the hydraulic winch 12 to drive the hydraulic motor 21 to move up and down. The drill rod 22 is connected to the fixed seat 26 on the hydraulic motor 21 through the first connector 23. When the hydraulic motor 21 is working, it drives the drill rod 22 to rotate. When the hydraulic winch 12 drives the hydraulic motor 21 to move downward, the drill rod 22 begins to drill into the ground. The drill rod 22 is divided into upper and lower parts, which are connected by a hollow screw 24 and a screw hole 25. The user can disassemble it and slide the inner tube 31 into the drill rod 22. The first slider 32 on the outer wall of the inner tube 31 matches the first groove 311 inside the drill rod 22. The first slider 32 slides downward along the first groove 311 to complete the installation of the inner tube 31. After the drill rod 22 is drilled into the ground, the hydraulic motor 21 is stopped. The user should disassemble the first connector 23 and the fixing seat 26 at the upper end of the drill rod 22 to separate the drill rod 22 body from the hydraulic motor 21. Then, the user should disassemble the hollow screw 24 and screw hole 25 on the drill rod 22, dividing the drill rod 22 into two parts, thus exposing the upper end face of the internal tube 31 inside the drill rod 22. Then, the hydraulic winch 12 is operated to drive the hydraulic motor 21 to move upward a certain distance. Finally, the second connector 45 on the rack 41 is installed on the hydraulic motor 21. In the fixed base 26, the connection between the rack 41 and the hydraulic motor 21 is completed. Then, the hydraulic winch 12 is operated to drive the hydraulic motor 21 and the rack 41 downward, so that the rack 41 is inserted into the inner tube 31. It should be noted that the rack 41 needs to be aligned with the opening 43 at the upper end of the inner tube 31, and the second slider 42 on the rack 41 needs to be aligned with the second slide groove 44. When the rack 41 slides downward in the inner tube 31, the rack 41 meshes with the gear 46 in the inner tube 31 in sequence, and drives the gear 46 to rotate. The rotation of the gear 46 will drive the worm gear 34. The rotation of the worm gear 34 drives the worm 33 to rotate, and the worm 33 drives the soil-collecting head unit 37 to move into the soil-collecting hole 38. During this movement, the soil-collecting head unit 37 first opens the movable door 39 and then comes into contact with the soil outside the drill rod 22. Because the worm 33 drives the soil-collecting head unit 37 to rotate, the breaking head 372 inside the soil-collecting head unit 37 breaks the soil, allowing it to fall into the soil-collecting chamber 371. The depression at the bottom of the soil-collecting chamber 371 better stores the soil and prevents it from falling out. Simultaneously, as the worm 33 rotates, the worm gear 34... 3. The threaded hole 36 at the other end is threadedly connected to the lead screw 35. The lead screw 35 and the threaded hole 36 rotate relative to each other, stabilizing the rotation of the worm gear 33 for soil extraction. When the rack 41 moves downward to its maximum position, multiple soil sampling head units 37 have collected soil samples at different depths. At this time, the hydraulic winch 12 is operated to drive the hydraulic motor 21 and the rack 41 upward, causing the rack 41 to be pulled away from the internal tube 31. When the rack 41 is pulled away from the internal tube 31, it will drive the gear 46 to rotate in the opposite direction, and the gear 46 will drive the worm gear 34 to rotate in the opposite direction.The worm gear 34 drives the worm 33 and the soil sampling head unit 37 to retract the internal tube 31 and reset. After the rack 41 is pulled out of the internal tube 31, the user can remove the internal tube 31 from the drill rod 22. Then, the specimen bottle is placed under the soil sampling port 374, and the switch 373 is manually turned on to allow the soil sample in the soil sampling chamber 371 to fall into the specimen bottle. It should be noted that multiple specimen bottles are needed to extract soil from the soil sampling chambers 371 at different depths, and the specimen bottles at the corresponding depths should be labeled and recorded. After the soil sample extraction is completed, the soil in all soil sampling chambers 371 should be cleaned, and then the internal tube 31 is reinstalled into the drill rod 22. Then, the rack 41 on the hydraulic motor 21 is removed, and the upper part of the drill rod 22 is reinstalled onto the drill rod 22. Then, the entire drill rod 22 is installed onto the fixing seat 26 on the hydraulic motor 21. The hydraulic winch 12 drives the hydraulic motor 21 to move upward, pulling the drill rod 22 out of the ground, and then the next soil sampling operation can be carried out.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sampling device for soil health detection, characterized by, include: Drill pipe (22); Soil sampling assembly (3) is fixedly connected inside the drill rod (22). The soil sampling assembly (3) includes an internal tube (31), a worm (33), a worm wheel (34), and a soil sampling head unit (37). The drill rod (22) is hollow, and the inner tube (31) is slidably installed inside the drill rod (22). The worm wheel (34) is rotatably connected inside the inner tube (31). The worm wheel (34) is rotatably connected to the inner wall of the inner tube (31). The worm wheel (34) and the worm (33) mesh. One end of the worm (33) is rotatably connected to the tube wall of the inner tube (31), and the other end of the worm (33) is fixedly connected to the soil sampling head unit (37). It also includes a power head assembly (2), which includes a hydraulic motor (21), a drill rod (22), a first connector (23), and a fixed base (26). The output shaft at the lower end of the hydraulic motor (21) is fixedly connected to the fixed seat (26), and the first connector (23) is fixedly installed inside the fixed seat (26). The drill rod (22) is fixedly connected to the lower end of the first connector (23). The drill rod (22) can be divided into upper and lower parts. The lower end of the upper part of the drill rod (22) is provided with a hollow screw (24). The hollow screw (24) and the screw hole (25) are threadedly connected. The screw hole (25) is opened on the upper end face of the lower part of the drill rod (22). It also includes: an auxiliary component (4), which includes a rack (41), a second slider (42), an opening (43), a second slide (44), a second connector (45), a gear (46) and a third slide (47). The upper end of the rack (41) is fixedly connected to the second connector (45), the second connector (45) and the fixed seat (26) are detachably connected, the rack (41) is fixedly connected to the second slider (42), the second slider (42) and the second slide groove (44) are slidably connected, the second slide groove (44) is opened on the opening (43), and the rack (41) and the third slide groove (47) are slidably connected; The opening (43) is formed on the upper end face of the built-in tube (31), the rack (41) extends into the built-in tube (31) and meshes with the gear (46), the gear (46) and the worm gear (34) are fixedly connected, and the third groove (47) is formed on the inner wall of the built-in tube (31).

2. A sampling device for soil health testing according to claim 1, characterized in that, Also includes: The moving component (1) is slidably connected to the power head component (2). The moving component (1) includes a tracked vehicle (11) and a hydraulic winch (12). The forward end of the tracked vehicle (11) is fixedly connected to the hydraulic winch (12), and the hydraulic motor (21) is slidably connected to the hydraulic winch (12).

3. A sampling device for soil health testing according to claim 1, characterized in that: A first slider (32) is fixedly connected to the outer wall of the built-in tube (31). The first slider (32) and the first groove (311) are slidably connected. The first groove (311) is opened inside the drill rod (22).

4. A sampling device for soil health testing according to claim 1, characterized in that: The soil sampling head unit (37) includes a soil sampling chamber (371), a crushing head (372), a switch (373), and a soil sampling port (374). The soil sampling cavity (371) is located at the end of the worm (33). The bottom of the soil sampling cavity (371) is recessed to facilitate the holding of soil. The crushing head (372) is fixedly connected to the outside of the soil sampling cavity (371). The soil sampling port (374) is located at the lowest point of the bottom of the soil sampling cavity (371). The switch (373) is installed inside the soil sampling port (374).

5. A sampling device for soil health testing according to claim 1, characterized in that: The worm (33) has a threaded hole (36) inside the end away from the soil sampling head unit (37). The threaded hole (36) and the lead screw (35) are threadedly connected. The lead screw (35) is fixedly connected to the inner wall of the built-in tube (31).

6. A sampling device for soil health testing according to claim 1, characterized in that: One end of the worm (33) passes through the inner tube (31) and rests between the inner tube (31) and the drill rod (22). The worm (33) and the inner tube (31) are fixedly connected by a bearing (312). The worm (33) has a soil sampling hole (38) facing the drill rod (22). The soil sampling hole (38) is adapted to the drill rod (22). The soil sampling hole (38) is opened on the drill rod (22). A movable door (39) is hinged inside the soil sampling hole (38). The movable door (39) has a limit block (310) on the side near the worm (33). The limit block (310) is fixedly connected to the lower wall of the soil sampling hole (38).

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