Multi-depth soil sampling device

Abstract

The invention provides a multi-depth soil sampling device, which comprises a moving plate, uniformly arranged driving mechanisms are fixed on the lower side of the moving plate, a round hole is formed in the side wall of the moving plate, a lifting mechanism is fixed on the lower side of the moving plate and located at the rear end of the round hole, a fixed pipe is fixed on the front side of the lifting mechanism, and the fixed pipe is fixed on the lower side of the moving plate. A threaded trepanning pipe is rotationally connected into the fixed pipe, soil layers are trepanned through the threaded trepanning pipe, after holes reach a certain depth, it is guaranteed that the threaded trepanning pipe does not move, soil of multiple layers is effectively prevented from being mixed, through cooperation of an adjusting mechanism, a moving mechanism and a telescopic mechanism, the soil can be adjusted, and the soil can be conveniently and rapidly adjusted. The sampling shovel is driven to penetrate through the through hole in the side wall of the threaded trepanning pipe, so that soil at the corresponding depth is sampled, sampling is simple, operation is easy, and it can be effectively guaranteed that multiple layers of soil cannot be mixed.

Description

Technical Field

[0001] This invention relates to the field of soil sampling technology, specifically to a multi-depth soil sampling device. Background Technology

[0002] With the acceleration of industrialization and urbanization, soil pollution problems such as excessive heavy metals, accumulated pesticide residues, and migration of persistent organic pollutants are becoming increasingly prominent. As the core carrier of the ecosystem, soil pollution not only damages soil structure and reduces soil fertility, leading to a decline in crop yield and quality, but also threatens human health through bioaccumulation in the food chain and groundwater infiltration, and may even trigger regional ecological crises. Currently, soil pollution is characterized by its high degree of concealment, complex types, and long remediation cycles. Some industrial remnant sites and agricultural planting areas pose a risk of vertical migration of pollutants. Therefore, it is urgent to use soil sampling devices to sample the soil and test pollution indicators within it to accurately identify pollution types, clarify the scope and depth of pollution, and quantify the degree of pollution.

[0003] The existing soil sampling devices still have the following technical problems when in use: Most existing soil sampling devices are suitable for directly sampling the soil surface. However, when sampling deep soil is required, the operation is difficult and multiple layers of soil are easily mixed together. After the soil is extracted, direct testing of this mixed soil will affect the accuracy of the test results.

[0004] Therefore, a multi-depth soil sampling device is proposed to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-depth soil sampling device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-depth soil sampling device, comprising a movable plate, a driving mechanism uniformly arranged on the lower side of the movable plate, a circular hole in the side wall of the movable plate, a lifting mechanism fixed at the rear end of the circular hole on the lower side of the movable plate, a fixed tube fixed at the front side of the lifting mechanism, a threaded perforated tube rotatably connected inside the fixed tube, a drill bit threadedly connected to the lower end of the threaded perforated tube, and a uniformly arranged through hole on the left side of the threaded perforated tube; A transmission mechanism is fixed to the right end inside the fixed tube, and a baffle is slidably connected to the left end inside the fixed tube. The left side of the baffle is slidably connected to the left side of the inner wall of the fixed tube. Evenly arranged rubber blocks are fixed to the left side of the baffle. The rubber blocks are snapped into the inside of the through hole. A fixing mechanism is fixed to the upper left end of the threaded perforated tube. The right end of the fixing mechanism is fixedly connected to the upper side of the baffle. An adjustment mechanism is fixed to the right end of the upper side of the movable plate. A moving mechanism is fixed to the side wall of the adjustment mechanism. A telescopic mechanism is fixed to the lower end of the moving mechanism. A sampling shovel is fixed to the lower end of the telescopic mechanism.

[0007] Preferably, the drive mechanism includes evenly arranged support rods, the upper ends of which are fixedly connected to the lower side of the movable plate, and evenly arranged movable wheels with foot brakes are fixed to the lower side of the support rods.

[0008] Preferably, the lifting mechanism includes a first housing, which is fixedly connected to the lower side of the movable plate. A vertical plate is fixed to the lower side of the first housing. A sliding groove is provided on the front side of the vertical plate. A first lead screw is rotatably connected inside the sliding groove. A first motor is fixed inside the first housing. The upper end of the first lead screw extends through the first housing and into the interior, and is fixedly connected to the output end of the first motor. A lifting block is threadedly connected to the wall of the first lead screw. The rear side of the lifting block is slidably connected to the inner wall of the sliding groove. The front side of the lifting block is fixedly connected to the rear side of the fixed tube.

[0009] Preferably, the transmission mechanism includes a second housing, which is fixedly connected to the upper side of the fixed tube. A second motor is fixed inside the second housing, and an output rod is fixed to the output end of the second motor. The output rod extends into the interior of the fixed tube and is fixed with a first gear. A second gear is fixedly sleeved on the wall of the threaded perforated tube, and the first gear and the second gear mesh.

[0010] Preferably, the fixing mechanism includes two limiting blocks, which are respectively fixedly connected to the front and rear sides of the threaded perforated tube. A limiting rod is fixed between the two limiting blocks. A moving block is slidably connected to the outside of the limiting rod. A connecting rod is fixed to the upper side of the moving block. The other end of the connecting rod is fixedly connected to the upper side of the baffle. A fastening bolt is threadedly connected to the side wall of the moving block. One end of the fastening bolt extending into the interior of the moving block is engaged with the limiting rod.

[0011] Preferably, the adjusting mechanism includes a strip plate, which is fixedly connected to the upper side of the movable plate. A third motor is fixedly mounted on the upper side of the strip plate. A sliding groove is provided on the left side of the strip plate. A second lead screw is rotatably connected inside the sliding groove. The upper end of the second lead screw is fixedly connected to the output end of the third motor. A horizontal plate is threadedly connected to the wall of the second lead screw. The right side of the horizontal plate is slidably connected to the inner wall of the sliding groove.

[0012] Preferably, the moving mechanism includes a mounting block, which is fixedly connected to the lower side of the cross plate. A telescopic cylinder is fixed to the side wall of the mounting block. The left end of the telescopic cylinder is fixedly connected to the right side of the telescopic mechanism. A guide rail is fixed to the left side of the mounting block. A limit ring is slidably connected to the outside of the guide rail. The lower side of the limit ring is fixedly connected to the upper side of the telescopic mechanism.

[0013] Preferably, the telescopic mechanism includes a first adjusting rod and a second adjusting rod. The upper end of the first adjusting rod is fixedly connected to the lower side of the limiting ring. The second adjusting rod is slidably connected inside the first adjusting rod. The lower ends of the left and right sides of the first adjusting rod are threaded with limiting bolts. One end of each limiting bolt extends into the interior of the first adjusting rod and engages with the second adjusting rod. A fixing ring is sleeved on the outside of the second adjusting rod. The left side of the fixing ring is fixedly connected to the right side of the sampling shovel. A disassembly bolt is threaded onto the right side of the fixing ring. The left end of the disassembly bolt extends into the interior of the fixing ring and engages with the second adjusting rod.

[0014] Preferably, an opening limiting ring plate is fixed to the upper end of the threaded perforated pipe wall, a soil sampling depth monitoring device is fixed to the right side of the opening limiting ring plate and the threaded perforated pipe, and a scale bar is fixed to the right side of the second adjusting rod.

[0015] Preferably, an illumination and shooting device is fixed to the lower end of the left side of the second adjusting rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This application uses a threaded perforated tube to create holes in the soil layer. Once the hole reaches a certain depth, the threaded perforated tube remains stationary, effectively preventing soil from mixing between different layers. Through the coordination of an adjustment mechanism, a moving mechanism, and a telescopic mechanism, a sampling shovel is driven to penetrate the through-hole in the side wall of the threaded perforated tube, thereby sampling the soil at the corresponding depth. This method is not only simple to use but also easy to operate, effectively ensuring that soil from different layers does not mix. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the front structure; Figure 3 This is a cross-sectional view of a threaded perforated pipe; Figure 4 for Figure 1 A magnified structural diagram of part A in the middle; Figure 5 This is a schematic diagram of the lifting mechanism; Figure 6 for Figure 1 A magnified structural diagram of part B in the middle section; Figure 7 for Figure 1 A magnified structural diagram of section C.

[0018] In the diagram: 1. Moving plate, 2. Illumination and imaging device, 3. Fixed pipe, 4. Threaded perforated pipe, 5. Drill bit, 6. Baffle, 7. Rubber block, 8. Sampling shovel, 9. Support rod, 10. Moving wheel with foot brake, 11. First housing, 12. Vertical plate, 13. First lead screw, 14. First motor, 15. Lifting block, 16. Second housing, 17. Second motor, 18. Output rod, 19. First gear, 20. Second gear, 21. Limiting block, 22. Limiting rod, 23. Moving block, 24. Connecting rod, 25. Strip plate, 26. Third motor, 27. Second lead screw, 28. Horizontal plate, 29. Mounting block, 30. Telescopic cylinder, 31. Guide rail, 32. Limiting ring, 33. First adjusting rod, 34. Second adjusting rod, 35. Fixed ring, 36. Perforated limiting ring plate, 37. Soil sampling depth monitoring device, 38. Scale bar. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Please see Figure 1-7 The present invention provides a multi-depth soil sampling device, including a movable plate 1, a driving mechanism evenly arranged on the lower side of the movable plate 1, a circular hole in the side wall of the movable plate 1, a lifting mechanism fixed at the rear end of the circular hole on the lower side of the movable plate 1, the lifting mechanism can drive the threaded perforated tube 4 at the front end to move up and down, so as to facilitate the drilling of the soil, a fixed tube 3 is fixed on the front side of the lifting mechanism, the threaded perforated tube 4 is rotatably connected inside the fixed tube 3, a drill bit 5 is threadedly connected to the lower end of the threaded perforated tube 4, and a through hole evenly arranged on the left side of the threaded perforated tube 4. A transmission mechanism is fixed to the right end of the fixed pipe 3. The transmission mechanism drives the threaded perforated pipe 4 to rotate. After soil is taken, if soil accumulates inside the threaded perforated pipe 4, the lower end of the drill bit 5 can be removed to process the soil inside. A baffle 6 is slidably connected to the left end of the fixed pipe 3. The left side of the baffle 6 is slidably connected to the left side of the inner wall of the fixed pipe 3. Rubber blocks 7 are evenly arranged on the left side of the baffle 6. The rubber blocks 7 are snapped into the inside of the through hole. A fixing mechanism is fixed to the upper left end of the threaded perforated pipe 4. The right end of the fixing mechanism is fixedly connected to the upper side of the baffle 6. When the threaded perforated pipe 4 drills into the soil, the rubber blocks 7 block the through hole to prevent soil from falling into the inside of the threaded perforated pipe 4. When drilling to a certain depth, the baffle 6 is rotated by manual adjustment. The baffle 6 drives the rubber blocks 7 to move, thereby opening the through hole. An adjustment mechanism is fixed to the right end of the upper side of the movable plate 1. A moving mechanism is fixed to the side wall of the adjustment mechanism. A telescopic mechanism is fixed to the lower end of the moving mechanism. A sampling shovel 8 is fixed to the lower end of the telescopic mechanism.

[0022] The drive mechanism includes evenly arranged support rods 9, the upper ends of which are fixedly connected to the lower side of the movable plate 1, and evenly arranged movable wheels 10 with foot brakes are fixed to the lower side of the support rods 9.

[0023] The lifting mechanism includes a first housing 11, which is fixedly connected to the lower side of the movable plate 1. A vertical plate 12 is fixedly fixed to the lower side of the first housing 11. A sliding groove is opened on the front side of the vertical plate 12. A first lead screw 13 is rotatably connected inside the sliding groove. A first motor 14 is fixed inside the first housing 11. The upper end of the first lead screw 13 extends through the first housing 11 into the interior and is fixedly connected to the output end of the first motor 14. A lifting block 15 is threadedly connected to the rod wall of the first lead screw 13. The rear side of the lifting block 15 is slidably connected to the inner wall of the sliding groove. The front side of the lifting block 15 is fixedly connected to the rear side of the fixed tube 3. The first motor 14 is a forward and reverse motor. The first motor 14 drives the first lead screw 13 at the output end to rotate. The first lead screw 13 drives the lifting block 15 threadedly connected to the rod wall to move. The lifting block 15 drives the fixed tube 3 on the side wall to move up and down.

[0024] The transmission mechanism includes a second housing 16, which is fixedly connected to the upper side of the fixed pipe 3. A second motor 17 is fixed inside the second housing 16. An output rod 18 is fixed to the output end of the second motor 17. The output rod 18 extends into the interior of the fixed pipe 3 and is fixed with a first gear 19. A second gear 20 is fixedly sleeved on the wall of the threaded perforated pipe 4. The first gear 19 and the second gear 20 mesh. The second motor 17 drives the output rod 18 at the output end to rotate. The output rod 18 drives the first gear 19 to rotate. The first gear 19 drives the second gear 20 to rotate. The second gear 20 drives the threaded perforated pipe 4 to rotate, thereby opening a hole in the soil.

[0025] The fixing mechanism includes two limiting blocks 21, which are fixedly connected to the front and rear sides of the threaded perforated tube 4, respectively. A limiting rod 22 is fixed between the two limiting blocks 21. A moving block 23 is slidably connected to the outside of the limiting rod 22. A connecting rod 24 is fixed to the upper side of the moving block 23. The other end of the connecting rod 24 is fixedly connected to the upper side of the baffle 6. A fastening bolt is threadedly connected to the side wall of the moving block 23. One end of the fastening bolt extends into the interior of the moving block 23 and engages with the limiting rod 22. The fixing mechanism is used to limit and fix the baffle 6 and the rubber block 7. When the baffle 6 and the rubber block 7 move to the corresponding positions, they are fixed by the fixing mechanism.

[0026] The adjustment mechanism includes a strip plate 25, which is fixedly connected to the upper side of the movable plate 1. A third motor 26 is fixedly mounted on the upper side of the strip plate 25. A slide groove is provided on the left side of the strip plate 25. A second lead screw 27 is rotatably connected inside the slide groove. The upper end of the second lead screw 27 is fixedly connected to the output end of the third motor 26. A horizontal plate 28 is threadedly connected to the rod wall of the second lead screw 27. The right side of the horizontal plate 28 is slidably connected to the inner wall of the slide groove. The third motor 26 is a forward and reverse reversible motor. The third motor 26 drives the second lead screw 27 at the output end to rotate. The second lead screw 27 drives the horizontal plate 28 threadedly connected to the rod wall to move. The horizontal plate 28 drives the moving mechanism of the side wall and the telescopic mechanism at the lower end to move up and down.

[0027] The moving mechanism includes a mounting block 29, which is fixedly connected to the lower side of the horizontal plate 28. A telescopic cylinder 30 is fixedly mounted on the side wall of the mounting block 29. The left end of the telescopic cylinder 30 is fixedly connected to the right side of the telescopic mechanism. A guide rail 31 is fixedly mounted on the left side of the mounting block 29. A limit ring 32 is slidably connected to the outside of the guide rail 31. The lower side of the limit ring 32 is fixedly connected to the upper side of the telescopic mechanism. The telescopic cylinder 30 drives the telescopic mechanism at the left end and the sampling shovel 8 at the lower end to move left and right, thereby facilitating the movement of the sampling shovel 8 into the interior of the soil layer for rapid soil sampling.

[0028] The telescopic mechanism includes a first adjusting rod 33 and a second adjusting rod 34. The upper end of the first adjusting rod 33 is fixedly connected to the lower side of the limiting ring 32. The second adjusting rod 34 is slidably connected inside the first adjusting rod 33. The lower ends of the left and right sides of the first adjusting rod 33 are threaded with limiting bolts. One end of the two limiting bolts extends into the interior of the first adjusting rod 33 and engages with the second adjusting rod 34. A fixing ring 35 is sleeved on the outside of the second adjusting rod 34. The left side of the fixing ring 35 is fixedly connected to the right side of the sampling shovel 8. A disassembly bolt is threaded on the right side of the fixing ring 35. The left end of the disassembly bolt extends into the interior of the fixing ring 35 and engages with the second adjusting rod 34.

[0029] An opening limiting ring plate 36 is fixed to the upper end of the threaded opening pipe 4. A soil sampling depth monitoring device 37 is fixed to the right side of the opening limiting ring plate 36 and the threaded opening pipe 4. The soil sampling depth monitoring device 37 is used to cooperate with the scale bar 38. For example, if it is necessary to take soil from the bottom 20 cm position, the soil sampling depth monitoring device 37 will issue a reminder when it detects that the scale bar 38 is 20 cm above the bottom. The operator will then stop moving the sampling shovel 8. The scale bar 38 is fixed to the right side of the second adjusting rod 34.

[0030] The lower left end of the second adjusting rod 34 is fixed with an illumination and imaging device 2. Due to insufficient light inside the threaded perforated tube 4, it is difficult for the sampling shovel 8 to be moved precisely to the through hole. The illumination and imaging device 2 can increase the light inside the threaded perforated tube 4 and transmit the internal video information to the operator. The operator can directly see the internal situation through the mobile terminal, which makes it convenient to accurately align the sampling shovel 8 with the through hole.

[0031] Working principle: In use, push the device to the corresponding position, lock the caster wheel 10 with foot brake, and start the first motor 14 and the second motor 17. The first motor 14 drives the first lead screw 13 at the output end to rotate. The first lead screw 13 drives the lifting block 15 connected to the rod wall thread to move down. The lifting block 15 drives the fixed tube 3 and the threaded opening tube 4 at the front to move down. The second motor 17 drives the output rod 18 to rotate. The output rod 18 drives the first gear 19 at the lower end to rotate. The first gear 19 drives the second gear 20 to rotate. The second gear 20 drives the threaded opening tube 4 to rotate, thereby opening a hole in the soil. When the opening limit ring plate 36 contacts the ground, the threaded opening tube 4 moves to the deepest position in the soil. By manually adjusting the moving block 23 outside the limiting rod 22, the moving block 23 drives the connecting rod 24 and the baffle 6 on the upper side, and the baffle 6 drives the rubber block 7 on the side wall to move, and the rubber block 7 separates from the through hole on the side wall of the threaded perforated tube 4. The extension length of the second adjustment rod 34 inside the first adjustment rod 33 is moved downwards, causing the sampling shovel 8 at the lower end to approach the soil surface. The third motor 26 is started, which drives the second lead screw 27 at the output end to rotate. The second lead screw 27 drives the horizontal plate 28 connected to the rod wall to move downwards. The horizontal plate 28 drives the sampling shovel 8 at the lower end to continue moving downwards, moving into the interior of the threaded perforated tube 4. The position of the internal through hole is observed according to the lighting and shooting device 39, and the depth of the sampling shovel 8 is monitored by the cooperation of the soil sampling depth monitoring device 37 and the scale bar 38. When the depth to be sampled is reached, the telescopic cylinder 30 is started, which drives the first adjustment rod 33 and the second adjustment rod 34 on the side wall to move. The second adjustment rod 34 drives the sampling shovel 8 at the lower end to penetrate the through hole and dig soil from the corresponding soil layer. After the soil is dug, the sampling shovel 8 is moved to the upper end of the moving plate 1 by moving in the opposite direction, and the soil collected inside is manually bagged.

[0032] It should be noted that the electrical components mentioned in this invention have had their wiring harnesses combed according to actual conditions during manufacturing, so that the wiring harnesses will not be tangled or affect the operation. All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The control method of this invention is through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. It should be noted that the electrical components mentioned in this invention have been sorted according to the actual situation during manufacturing, so as not to cause the wire harness to become tangled or affect the operation. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-depth soil sampling device, comprising a movable plate (1), characterized in that, The lower side of the moving plate (1) is fixed with a uniformly arranged driving mechanism. The side wall of the moving plate (1) is provided with a round hole. The lower side of the moving plate (1) is fixed with a lifting mechanism at the rear end of the round hole. The front side of the lifting mechanism is fixed with a fixed tube (3). The inside of the fixed tube (3) is rotatably connected with a threaded hole tube (4). The lower end of the threaded hole tube (4) is threaded with a drill bit (5). The left side of the threaded hole tube (4) is provided with a uniformly arranged through hole. A transmission mechanism is fixed at the right end inside the fixed tube (3), and a baffle (6) is slidably connected to the left end inside the fixed tube (3). The left side of the baffle (6) is slidably connected to the left side of the inner wall of the fixed tube (3). A rubber block (7) is evenly arranged on the left side of the baffle (6). The rubber block (7) is snapped into the inside of the through hole. A fixing mechanism is fixed at the upper end of the left side of the threaded opening tube (4). The right end of the fixing mechanism is fixedly connected to the upper side of the baffle (6). An adjustment mechanism is fixed to the right end of the upper side of the movable plate (1), a moving mechanism is fixed to the side wall of the adjustment mechanism, a telescopic mechanism is fixed to the lower end of the moving mechanism, and a sampling shovel (8) is fixed to the lower end of the telescopic mechanism.

2. The multi-depth soil sampling device according to claim 1, characterized in that: The drive mechanism includes evenly arranged support rods (9), the upper ends of which are fixedly connected to the lower side of the moving plate (1), and evenly arranged moving wheels (10) with foot brakes are fixed to the lower side of the support rods (9).

3. The multi-depth soil sampling device according to claim 1, characterized in that: The lifting mechanism includes a first housing (11), which is fixedly connected to the lower side of the moving plate (1). A vertical plate (12) is fixed to the lower side of the first housing (11). A sliding groove is provided on the front side of the vertical plate (12). A first lead screw (13) is rotatably connected inside the sliding groove. A first motor (14) is fixed inside the first housing (11). The upper end of the first lead screw (13) extends through the first housing (11) and into the interior and is fixedly connected to the output end of the first motor (14). A lifting block (15) is threadedly connected to the rod wall of the first lead screw (13). The rear side of the lifting block (15) is slidably connected to the inner wall of the sliding groove. The front side of the lifting block (15) is fixedly connected to the rear side of the fixed tube (3).

4. The multi-depth soil sampling device according to claim 1, characterized in that: The transmission mechanism includes a second housing (16), which is fixedly connected to the upper side of the fixed tube (3). A second motor (17) is fixed inside the second housing (16), and an output rod (18) is fixed at the output end of the second motor (17). The output rod (18) extends into the interior of the fixed tube (3) and is fixed with a first gear (19). A second gear (20) is fixedly sleeved on the wall of the threaded perforated tube (4), and the first gear (19) and the second gear (20) mesh.

5. The multi-depth soil sampling device according to claim 1, characterized in that: The fixing mechanism includes two limiting blocks (21), which are fixedly connected to the front and rear sides of the threaded perforated tube (4) respectively. A limiting rod (22) is fixed between the two limiting blocks (21). A moving block (23) is slidably connected to the outside of the limiting rod (22). A connecting rod (24) is fixed to the upper side of the moving block (23). The other end of the connecting rod (24) is fixedly connected to the upper side of the baffle (6). A fastening bolt is threadedly connected to the side wall of the moving block (23). One end of the fastening bolt extending into the inside of the moving block (23) is engaged with the limiting rod (22).

6. The multi-depth soil sampling device according to claim 1, characterized in that: The adjustment mechanism includes a strip plate (25), which is fixedly connected to the upper side of the movable plate (1). A third motor (26) is fixedly mounted on the upper side of the strip plate (25). A sliding groove is provided on the left side of the strip plate (25). A second lead screw (27) is rotatably connected inside the sliding groove. The upper end of the second lead screw (27) is fixedly connected to the output end of the third motor (26). A horizontal plate (28) is threadedly connected to the rod wall of the second lead screw (27). The right side of the horizontal plate (28) is slidably connected to the inner wall of the sliding groove.

7. A multi-depth soil sampling device according to claim 6, characterized in that: The moving mechanism includes a mounting block (29), which is fixedly connected to the lower side of the horizontal plate (28). A telescopic cylinder (30) is fixed to the side wall of the mounting block (29). The left end of the telescopic cylinder (30) is fixedly connected to the right side of the telescopic mechanism. A guide rail (31) is fixed to the left side of the mounting block (29). A limit ring (32) is slidably connected to the outside of the guide rail (31). The lower side of the limit ring (32) is fixedly connected to the upper side of the telescopic mechanism.

8. A multi-depth soil sampling device according to claim 7, characterized in that: The telescopic mechanism includes a first adjusting rod (33) and a second adjusting rod (34). The upper end of the first adjusting rod (33) is fixedly connected to the lower side of the limiting ring (32). The second adjusting rod (34) is slidably connected inside the first adjusting rod (33). The lower ends of the left and right sides of the first adjusting rod (33) are threaded with limiting bolts. One end of the two limiting bolts extends into the interior of the first adjusting rod (33) and engages with the second adjusting rod (34). A fixing ring (35) is sleeved on the outside of the second adjusting rod (34). The left side of the fixing ring (35) is fixedly connected to the right side of the sampling shovel (8). A disassembly bolt is threaded on the right side of the fixing ring (35). The left end of the disassembly bolt extends into the interior of the fixing ring (35) and engages with the second adjusting rod (34).

9. A multi-depth soil sampling device according to claim 8, characterized in that: The upper end of the wall of the threaded perforated pipe (4) is fixed with a perforation limiting ring plate (36), and a soil sampling depth monitoring device (37) is fixed on the right side of the perforation limiting ring plate (36) and the threaded perforated pipe (4). A scale bar (38) is fixed on the right side of the second adjusting rod (34).

10. A multi-depth soil sampling device according to claim 8, characterized in that: The lower left end of the second adjusting rod (34) is fixed with an illumination shooting device (2).

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