A soil sample sampler based on geographic information mapping service

Abstract

The application relates to the technical field of soil sampling, and discloses a soil sample sampler based on geographic information surveying and mapping services, which comprises a footboard, a sampling port arranged on the footboard, a U-shaped frame arranged on the footboard, a sampling tube arranged in the U-shaped frame, a sampling head arranged at the bottom of the sampling tube, two electric push rods symmetrically arranged at the top of the U-shaped frame, and a falling-prevention component arranged on the sampling tube. The soil sample sampler based on geographic information surveying and mapping services is characterized in that the falling-prevention, plugging and blocking components work together to firmly hold the soil sample in the tube, guarantee the sufficient sample retention, avoid repeated sampling, reduce the workload of field operation, ensure the sample integrity, and meet the core requirement of subsequent detection and analysis. The overall structure is reasonable in design, convenient and efficient in operation, the electric push rod replaces the traditional manpower deep sampling, and the labor intensity of the operation personnel is reduced.

Description

Technical Field

[0001] This invention relates to the field of soil sampling technology, and in particular to a soil sampler based on geographic information mapping services. Background Technology

[0002] Relying on technologies such as satellite remote sensing, UAV aerial surveying, and GIS spatial analysis, precise planning and real-time spatial coordinate positioning of sampling points can be achieved. Furthermore, by combining geographical data such as topography, landforms, and land use types, the sampling layout can be made more scientific and representative, providing a precise geographical basis for subsequent soil data analysis and spatial distribution modeling, and promoting the digitalization, refinement, and intelligentization of soil surveys. However, existing soil samplers still have the following shortcomings when used: In soil sampling, the standard procedure involves vertically aligning the sampling tube with the pre-set sampling point and gradually inserting it into the soil using manual pressure or mechanical means. Once the tube has reached the required depth, it is smoothly and vertically pulled out of the soil. The soil remaining inside the tube at this point is considered a suitable soil sample for analysis. This procedure is simple and easy to perform, and is the most widely used basic method in soil sampling. However, in actual field sampling, due to variations in regional soil texture, this procedure can easily lead to poor sample retention, especially in areas with high soil viscosity such as clay and silt. Because of the strong inter-particle cohesion and adhesion to the inner wall of the sampling tube in this type of area, the soil is prone to separate from the surrounding soil as the sampling tube is pulled out of the soil due to external tension and its own adhesion. After the sampling tube is pulled out of the soil surface, the soil inside the tube will slide out from the sampling tube end due to gravity because it loses the binding of the external soil. This results in a significant reduction in the actual amount of soil sample retained in the sampling tube, which is difficult to meet the basic requirements for sample volume for subsequent soil testing. This not only affects the efficiency of sampling operations, but also requires re-sampling, increasing the workload and time cost of field operations. Summary of the Invention

[0003] In view of the existing technology, conventional soil sampling tubes are prone to separation of the soil inside the tube from the surrounding soil during the extraction process when sampling in high-viscosity soil areas. After being completely pulled out of the soil surface, the soil inside the tube loses its external binding and slides out of the tube opening under gravity, resulting in insufficient soil sample volume inside the tube, which is difficult to meet the needs of subsequent testing. Therefore, a soil sampler based on geographic information mapping services is proposed.

[0004] This application provides a soil sampler based on geographic information mapping services. Its purpose is to optimize the sampler structure to prevent soil sample slippage, ensure effective sampling volume, improve sampling efficiency, and meet the sample requirements for subsequent soil testing and analysis.

[0005] The technical solution of the present invention is as follows: a soil sampler based on geographic information mapping services, including a foot pedal, a sampling port provided on the foot pedal, a U-shaped frame provided on the foot pedal, a sampling tube provided inside the U-shaped frame, a sampling head provided at the bottom of the sampling tube, two electric actuators symmetrically distributed on the top of the U-shaped frame, the output end of the electric actuators passing through the U-shaped frame and fixedly connected to the sampling tube, and also including an anti-falling component provided on the sampling tube; The anti-drop component includes an anti-drop assembly installed on the sampling tube, and the anti-drop assembly is provided with a clamping assembly, a sealing assembly, and a baffle assembly; The anti-fall component is used to support the soil sampled inside the sampling tube to prevent it from falling. The anti-drop component includes a sealing cover installed on the wall of the sampling tube. Several inlets and outlets are arranged in a circular array at the bottom of the sampling tube. Anti-drop plates are installed inside the inlets and outlets. The anti-drop plates are slidably connected to the inside of the sealing cover. A blocking plate is installed on the anti-drop plates.

[0006] Furthermore, the rotary clamp assembly includes a bottom ring disposed inside the sealing cover, which is fixedly connected to the outer wall of the sampling tube. The bottom ring has several straight holes arranged in a circular array, and a slider is disposed inside the straight holes. An anti-drop plate is fixedly connected to the corresponding slider, and a guide rod is disposed on the top of the slider. A top ring is also disposed inside the sealing cover, which is rotatably connected to the outer wall of the sampling tube. The top ring has several oblique holes arranged in a circular array, and the guide rod is slidably connected to the inner side of the corresponding oblique hole.

[0007] Furthermore, the sealing assembly includes a sealing groove disposed on the anti-fall plate, a sealing plate being slidably connected to the inner side of the sealing groove, a sealing spring being disposed between the sealing plate and the inner wall of the sealing groove, and a first inclined surface being disposed on the sealing plate, the first inclined surface being slidably connected to the inner wall of the sampling tube.

[0008] Furthermore, the baffle assembly includes baffle grooves arranged in a ring array on the sampling tube, the baffle grooves are connected to the corresponding inlets and outlets, an arc-shaped baffle plate is provided on the inner side of the baffle groove, a baffle spring is provided between the arc-shaped baffle plate and the inner wall of the baffle groove, a second inclined surface is provided on the arc-shaped baffle plate, and the second inclined surface is slidably connected to the corresponding anti-fall plate.

[0009] Furthermore, the anti-drop component also includes a tightening assembly disposed inside the sealing cover, and a knob assembly is disposed on the sampling tube; The tensioning assembly includes a tensioning rod disposed on the sealing cover, with a gear disposed at one end of the tensioning rod located inside the sealing cover, and a toothed groove disposed on the top ring, with the gear meshing with the toothed groove.

[0010] Furthermore, the knob assembly includes a knob wheel disposed on the tension rod, a knob spring disposed between the knob wheel and the tension rod, and the knob spring being sleeved on the tension rod.

[0011] Furthermore, it also includes a sample inverting assembly installed on the sampling tube, the sample inverting assembly including an operating port located at the top of the sampling tube, and a piston disc installed inside the sampling tube.

[0012] Furthermore, it also includes positioning pins that are symmetrically distributed at the bottom of the foot pedal.

[0013] The beneficial effects of this invention are: Through the coordinated action of anti-fall, sealing, and barrier components, the soil sample inside the pipe is firmly held, ensuring sufficient sample retention, avoiding repeated sampling, reducing the workload of field operations, and ensuring sample integrity to meet the core requirements of subsequent testing and analysis.

[0014] By relying on geographic information mapping services to achieve precise positioning of sampling points, and with the fixing effect of positioning nails and foot pedals, the offset of sampling points is reduced. Combined with the smooth sampling driven by electric actuators, the sampling accuracy and consistency are improved, providing reliable sample support for soil spatial distribution modeling and resource assessment.

[0015] The overall structure is reasonably designed, and the operation is convenient and efficient. The electric actuator replaces the traditional manual deep sampling, reducing the labor intensity of the operators. All components work together smoothly, and the sample pouring and resetting operations are simple. It is suitable for complex field terrain and can avoid soil contamination of parts, extend the service life of the device, and improve the efficiency of sampling operations. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the sampling tube structure of the present invention; Figure 3 This is a schematic cross-sectional view of the sampling tube of the present invention; Figure 4 This is a schematic diagram of the anti-fall component structure of the present invention; Figure 5 This is a partial structural diagram of the anti-fall component of the present invention; Figure 6 This is an exploded view of the rotary clamp assembly of the present invention; Figure 7 This is a schematic diagram of the sealing component structure of the present invention; Figure 8 This is a schematic diagram of the barrier component structure of the present invention; Figure 9 This is a schematic diagram of the knob assembly structure of the present invention.

[0017] In the picture: 1. Foot pedal; 11. Sampling port; 12. U-shaped frame; 13. Sampling tube; 14. Sampling head; 15. Electric actuator; 16. Positioning pin; 2. Anti-fall assembly; 21. Sealing cover; 22. Inlet / outlet; 23. Anti-fall plate; 24. Sealing plate; 3. Rotary clamp assembly; 31. Bottom ring; 32. Straight hole; 33. Slider; 34. Guide rod; 35. Top ring; 36. Angled hole; 4. Sealing assembly; 41. Sealing groove; 42. Sealing spring; 5. Baffle assembly; 51. Baffle groove; 52. Arc-shaped baffle plate; 53. Baffle spring; 6. Tensioning assembly; 61. Tensioning rod; 62. Gear; 63. Gear groove; 7. Knob assembly; 71. Knob wheel; 72. Knob spring; 8. Sample inversion assembly; 81. Operating port; 82. Piston disc. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] Example 1, referring to Figures 1-8 This invention provides a soil sampler based on geographic information mapping services, comprising a foot pedal 1 with a sampling port 11, a U-shaped frame 12 fixedly connected to the foot pedal 1, a sampling tube 13 slidably connected inside the U-shaped frame 12, a sampling head 14 fixedly connected to the bottom of the sampling tube 13, and two electric actuators 15 symmetrically distributed and fixedly connected to the top of the U-shaped frame 12. The output ends of the electric actuators 15 pass through the U-shaped frame 12 and are fixedly connected to the sampling tube 13. The invention also includes an anti-drop component installed on the sampling tube 13. The system includes an anti-fall component 2 installed on the sampling tube 13. The anti-fall component 2 is equipped with a clamping component 3, a sealing component 4, and a partition component 5. The anti-fall component is used to support the soil sampled in the sampling tube 13 to prevent it from falling. The anti-fall component 2 includes a sealing cover 21 fixedly connected to the wall of the sampling tube 13. The bottom of the sampling tube 13 has several inlets and outlets 22 arranged in a ring array. An anti-fall plate 23 is slidably connected to the inside of the inlets and outlets 22. The anti-fall plate 23 is slidably connected to the inside of the sealing cover 21. A sealing plate 24 is slidably connected to the anti-fall plate 23.

[0020] Specifically, firstly, the operator moves the sampler to the sampling point determined by geographic information mapping, aligns the sampling port 11 on the foot pedal 1 with the center of the point, and steps on the foot pedal 1 with both feet to manually fix the overall position of the sampler, preventing the device from shifting during sampling and ensuring sampling accuracy. Then, the two electric actuators 15 symmetrically mounted on the top of the U-shaped frame 12 are activated. The output ends of the electric actuators 15 extend downwards, driving the sampling tube 13, which is fixedly connected to them, to slide smoothly down the inside of the U-shaped frame 12. The sampling head 14 at the bottom of the sampling tube 13 then cuts into the soil, completing the sampling at a preset depth. The outer diameter of the sampling head 14 is smaller than the inner diameter of the sampling port 11, ensuring that the sampling head 14 can smoothly pass through the inside of the sampling port 11. During sampling, the anti-fall device is in its initial state; the anti-fall plate 23 retracts between the sealing cover 21 and the wall of the sampling tube 13, not obstructing soil from entering the sampling tube 13 through the sampling head 14. The outer diameter of the sampling head 14 is larger than the outer diameter of the sealing cover 21. The sampling head 14 penetrates deep into the soil, allowing soil to enter the sampling head 14 and forming a hole on the ground with a diameter equivalent to that of the sampling head 14. The sealing cover 21 can slide within the hole. The sampling head 14 is funnel-shaped to ensure that the soil can enter the sampling tube 13 smoothly without obstruction. When the sampling tube 13 is inserted to a certain depth and filled with soil sample, the output end of the electric actuator 15 retracts upward, driving the sampling tube 13 to rise synchronously. At this time, the anti-fall component 2 is activated, and the anti-fall plate 23 slides along the inner side of the sealing cover 21 toward the center of the sampling tube 13, passes through the inlet / outlet 22 and extends into the tube, providing bottom support for the soil sample inside the tube; at the same time, the sealing plate 24 slides closed, further sealing the gap between the two adjacent anti-fall plates 23 to prevent soil from slipping out of the gap. After the sampling tube 13 is completely pulled out of the soil surface, the anti-fall plate 23 and the sealing plate 24 continue to function, overcoming the soil's gravity and adhesion, firmly supporting the sample inside the tube and preventing it from slipping. Once the sampling tube 13 has been raised to a suitable height, the anti-fall component 2 is reset, causing the anti-fall plate 23 and the sealing plate 24 to retract, allowing the soil sample inside the tube to be easily retrieved, completing a precise sampling operation.

[0021] Reference Figures 4-6 The rotary clamp assembly 3 includes a bottom ring 31 disposed inside the sealing cover 21. The bottom ring 31 is fixedly connected to the outer wall of the sampling tube 13. Several straight holes 32 are arranged in a ring array on the bottom ring 31. A slider 33 is slidably connected inside the straight holes 32. The anti-drop plate 23 is fixedly connected to the corresponding slider 33. A guide rod 34 is fixedly connected to the top of the slider 33. A top ring 35 is also disposed inside the sealing cover 21. The top ring 35 is rotatably connected to the outer wall of the sampling tube 13. Several oblique holes 36 are arranged in a ring array on the top ring 35. The guide rod 34 is slidably connected to the inner side of the corresponding oblique hole 36.

[0022] Specifically, during sampling, the anti-fall plate 23 is retracted inside the sealing cover 21. The guide rod 34 is located inside the inclined hole 36 at the end furthest from the center of the sampling tube 13, and the slider 33 is located inside the straight hole 32 at the end furthest from the center of the sampling tube 13. By rotating the top ring 35 clockwise, the guide rod 34 slides inside the inclined hole 36 at the end furthest from the center of the sampling tube 13, and the slider 33 slides inside the straight hole 32 at the end furthest from the center of the sampling tube 13, causing the anti-fall plate 23 to slide inside the sealing cover 21. When the sampling tube 13 is pulled out of the soil after sampling, the anti-fall plate 23 extends from the inlet / outlet 22 and converges to support the soil inside the sampling tube 13 and prevent it from falling. The guide rod 34 is located inside the inclined hole 36 at the end closest to the center of the sampling tube 13, and the slider 33 is located inside the straight hole 32 at the end closest to the center of the sampling tube 13. The top ring 35 rotates in the opposite direction, causing the guide rod 34 to slide inside the inclined hole 36 toward the center of the sampling tube 13, and the slider 33 to slide inside the straight hole 32 toward the center of the sampling tube 13.

[0023] Reference Figure 7 The sealing assembly 4 includes a sealing groove 41 formed on the anti-fall plate 23, a sealing plate 24 and a sealing groove 41 with a limiting sliding connection, a sealing spring 42 fixedly connected between the sealing plate 24 and the inner wall of the sealing groove 41, and a first inclined surface formed on the sealing plate 24, which is slidably connected to the inner wall of the sampling tube 13.

[0024] Specifically, during sampling, the anti-fall plate 23 is retracted inside the sealing cover 21. Under the action of the inner wall of the inlet / outlet 22, it squeezes the sealing plate 24, causing the sealing plate 24 to retract inside the sealing groove 41 and squeeze the sealing spring 42. When the sampling tube 13 is pulled out of the soil at the end of sampling, the anti-fall plate 23 extends out from the inside of the inlet / outlet 22, and the inlet / outlet 22 no longer squeezes the sealing plate 24. At this time, under the action of the sealing spring 42, the sealing plate 24 pops out from the inside of the sealing groove 41 and abuts against the side wall of the adjacent anti-fall plate 23. Under the combined action of multiple anti-fall plates 23 and sealing plates 24, the bottom of the sampling tube 13 is supported, preventing the soil inside the sampling tube 13 from falling out of the bottom of the sampling tube 13. When it is necessary to discharge the soil sample in the sampling tube 13, the anti-fall plate 23 slides from the inside of the inlet 22 to the inside of the sealing cover 21. Under the action of the first inclined surface, the sealing plate 24 slides against the inner wall of the sampling tube 13, and the sealing plate 24 slides into the sealing groove 41, so that the sealing plate 24 enters the inner side of the sealing groove 41.

[0025] Reference Figure 8The baffle assembly 5 includes baffle grooves 51 arranged in a ring array on the sampling tube 13. The baffle grooves 51 are connected to the corresponding inlet and outlet 22. An arc-shaped baffle plate 52 is slidably connected to the inner side of the baffle groove 51. A baffle spring 53 is fixedly connected between the arc-shaped baffle plate 52 and the inner wall of the baffle groove 51. A second inclined surface is provided on the arc-shaped baffle plate 52. The second inclined surface is slidably connected to the corresponding anti-fall plate 23.

[0026] Specifically, during sampling, the anti-fall plate 23 is retracted inside the sealing cover 21. Under the action of the baffle spring 53, the arc-shaped baffle plate 52 slides downward from the inside of the baffle groove 51 and enters the inside of the inlet / outlet 22, sealing the inlet / outlet 22. This prevents soil from entering the inside of the sealing cover 21 from the inside of the inlet / outlet 22 during sampling, thus avoiding interference with the components inside the sealing cover 21. When the sampling tube 13 is pulled out of the soil at the end of sampling, the anti-fall plate 23 will enter the inside of the inlet / outlet 22. Under the action of the second inclined plane, the anti-fall plate 23 will push the arc-shaped baffle plate 52 upward into the inside of the baffle groove 51, squeezing the baffle spring 53, so that the anti-fall plate 23 can smoothly extend from the inside of the inlet / outlet 22.

[0027] Example 2, refer to Figure 4 and Figure 5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the anti-fall component also includes a tensioning component 6 installed inside the sealing cover 21, and a knob component 7 is installed on the sampling tube 13. The tensioning component 6 includes a tensioning rod 61 rotatably connected to the sealing cover 21. A gear 62 is fixedly connected to one end of the tensioning rod 61 located inside the sealing cover 21. A toothed groove 63 is provided on the top ring 35, and the gear 62 is meshed with the toothed groove 63.

[0028] Specifically, rotating the tension lever 61 forward drives the gear 62 to rotate, which, under the action of the tooth groove 63, drives the top ring 35 to rotate forward, adjusting the anti-drop plate 23 to be inserted into the sampling tube 13. Reversing the tension lever 61 reverses the rotation of the top ring 35, adjusting the anti-drop plate 23 to retract into the sealing cover 21.

[0029] Reference Figure 9 The knob assembly 7 includes a knob wheel 71 that is slidably connected to the tension rod 61, and a knob spring 72 that is fixedly connected between the knob wheel 71 and the tension rod 61. The knob spring 72 is sleeved on the tension rod 61.

[0030] Specifically, two symmetrically distributed locking rods are fixedly connected to the knob wheel 71, and two symmetrically distributed locking slots are opened on the sampling tube 13. The locking rods engage with the inner side of the corresponding locking slots. When it is necessary to rotate the tension rod 61, the knob wheel 71 is lifted upward, compressing the knob spring 72, causing the locking rods to separate from the inner side of the locking slots. Rotating the knob wheel 71 causes a limited sliding connection between the knob wheel 71 and the tension rod 61, thereby driving the tension rod 61 to rotate. When it is not necessary to rotate the tension rod 61, and it is necessary to limit the tension rod 61, the knob wheel 71 is released. Under the action of the knob spring 72, the knob wheel 71 slides downward on the tension rod 61, the locking rods engage with the inner side of the locking slots, limiting the rotation of the knob wheel 71. The limited sliding connection between the knob wheel 71 and the tension rod 61 further limits the movement of the tension rod 61. The remaining structure is the same as that in Embodiment 1.

[0031] Example 3, referring to Figure 2 and Figure 3 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that it also includes a sample pouring component 8 installed on the sampling tube 13. The sample pouring component 8 includes an operation port 81 opened at the top of the sampling tube 13, and a piston disc 82 is slidably connected to the inner side of the sampling tube 13.

[0032] Specifically, during sampling, as the soil sample enters the sampling tube 13, the piston plate 82 is pushed upwards. When it is necessary to pour out the sample from the sampling tube 13, a stick with a diameter smaller than the inner diameter of the operating port 81 is inserted into the inside of the operating port 81 and pushed downwards, causing the piston plate 82 to slide downwards inside the sampling tube 13, thus pouring out the sample from the sampling tube 13.

[0033] Reference Figure 2 and Figure 3 It also includes positioning pins 16 that are symmetrically distributed and fixedly connected to the bottom of the foot pedal 1.

[0034] Specifically, by pressing down on the foot pedal 1, the positioning pin 16 is inserted into the soil. Under the action of the positioning pin 16, the foot pedal 1 is positioned, facilitating the sampling of soil samples. The remaining structure is the same as that in Example 2.

[0035] Based on embodiments 1-3, the working principle of this invention is as follows: The operator moves the device to the designated location, steps on foot pedal 1 with both feet to insert the bottom positioning nail 16 into the soil fixing device, and simultaneously aligns the sampling port 11 with the center of the location to prevent sampling deviation. The outer diameter of the trumpet-shaped sampling head 14 is smaller than the sampling port 11 but larger than the sealing cover 21, allowing it to smoothly pass through the sampling port 11 and cut into the soil. The sealing cover 21 can slide within the hole formed by the sampling. The two electric actuators 15 at the top of the U-shaped frame 12 are activated, their output ends extending downwards, driving the sampling tube 13 down along the U-shaped frame 12, and the sampling head 14 cuts into the soil to a preset depth. At this time, the anti-fall component is in its initial state, the guide rod 34 and slider 33 of the clamping assembly 3 are located at the end furthest from the center of the sampling tube 13, the anti-fall plate 23 retracts, and the arc-shaped baffle 52 of the baffle assembly 5, under the action of the spring, blocks the inlet and outlet 22, preventing soil from entering the sealing cover 21. After sampling is completed, the electric actuator 15 retracts, lifting the sampling tube 13. The anti-fall plate 23 pushes the arc-shaped baffle 52 to retract, and at the same time, the clamping assembly 3 drives the anti-fall plate 23 to pass through the inlet / outlet 22 and converge. The sealing plate 24 of the sealing assembly 4 pops out to seal the gap, together supporting the soil sample to prevent it from falling. After the sampling tube 13 is pulled out, the anti-fall plate 23 can be reset by adjusting the tensioning assembly 6 and the knob assembly 7. Then, the piston plate 82 is pushed by the operating port 81 of the pouring assembly 8 to smoothly pour out the soil sample, completing a precise sampling.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A soil sampler based on geographic information mapping services, comprising a foot pedal (1), a sampling port (11) provided on the foot pedal (1), a U-shaped frame (12) also provided on the foot pedal (1), a sampling tube (13) provided inside the U-shaped frame (12), a sampling head (14) provided at the bottom of the sampling tube (13), and two electric actuators (15) symmetrically distributed on the top of the U-shaped frame (12), the output end of the electric actuators (15) passing through the U-shaped frame (12) and fixedly connected to the sampling tube (13), characterized in that: It also includes a fall prevention component installed on the sampling tube (13); The anti-drop component includes an anti-drop assembly (2) installed on the sampling tube (13), and the anti-drop assembly (2) is provided with a screw clamp assembly (3), a sealing assembly (4) and a barrier assembly (5). The anti-fall component is used to support the soil sampled in the sampling tube (13) to prevent it from falling. The anti-fall component (2) includes a sealing cover (21) set on the wall of the sampling tube (13). The bottom of the sampling tube (13) is provided with a number of inlets and outlets (22) arranged in a ring array. An anti-fall plate (23) is provided inside the inlet and outlet (22). The anti-fall plate (23) is slidably connected to the inside of the sealing cover (21). A sealing plate (24) is provided on the anti-fall plate (23).

2. The soil sampler based on geographic information mapping services according to claim 1, characterized in that: The rotary clamp assembly (3) includes a bottom ring (31) disposed inside the sealing cover (21). The bottom ring (31) is fixedly connected to the outer wall of the sampling tube (13). Several straight holes (32) are arranged in a ring array on the bottom ring (31). A slider (33) is disposed inside the straight holes (32). An anti-drop plate (23) is fixedly connected to the corresponding slider (33). A guide rod (34) is disposed on the top of the slider (33). A top ring (35) is also disposed inside the sealing cover (21). The top ring (35) is rotatably connected to the outer wall of the sampling tube (13). Several oblique holes (36) are arranged in a ring array on the top ring (35). The guide rod (34) is slidably connected to the inner side of the corresponding oblique hole (36).

3. The soil sampler based on geographic information mapping services according to claim 1, characterized in that: The sealing assembly (4) includes a sealing groove (41) provided on the anti-fall plate (23), a sealing plate (24) and a sealing groove (41) with a limit sliding connection, a sealing spring (42) provided between the sealing plate (24) and the inner wall of the sealing groove (41), a first inclined surface provided on the sealing plate (24), and the first inclined surface is slidably connected to the inner wall of the sampling tube (13).

4. The soil sampler based on geographic information mapping services according to claim 1, characterized in that: The barrier assembly (5) includes barrier grooves (51) arranged in a ring array on the sampling tube (13). The barrier grooves (51) are connected to the corresponding inlet and outlet (22). An arc-shaped barrier plate (52) is provided on the inner side of the barrier groove (51). A barrier spring (53) is provided between the arc-shaped barrier plate (52) and the inner wall of the barrier groove (51). A second inclined surface is provided on the arc-shaped barrier plate (52). The second inclined surface is slidably connected to the corresponding anti-fall plate (23).

5. The soil sampler based on geographic information mapping services according to claim 2, characterized in that: The anti-fall component also includes a tightening assembly (6) located inside the sealing cover (21), and a knob assembly (7) is provided on the sampling tube (13). The tensioning assembly (6) includes a tensioning rod (61) disposed on the sealing cover (21). A gear (62) is disposed at one end of the tensioning rod (61) located inside the sealing cover (21). A toothed groove (63) is disposed on the top ring (35). The gear (62) and the toothed groove (63) are meshed and connected.

6. The soil sampler based on geographic information mapping services according to claim 5, characterized in that: The knob assembly (7) includes a knob wheel (71) disposed on the tension rod (61), and a knob spring (72) is disposed between the knob wheel (71) and the tension rod (61), with the knob spring (72) sleeved on the tension rod (61).

7. The soil sampler based on geographic information mapping services according to claim 1, characterized in that: It also includes a sample pouring assembly (8) provided on the sampling tube (13), the sample pouring assembly (8) includes an operation port (81) provided on the top of the sampling tube (13), and a piston disc (82) provided on the inner side of the sampling tube (13).

8. The soil sampler based on geographic information mapping services according to claim 1, characterized in that: It also includes positioning pins (16) that are symmetrically distributed at the bottom of the foot pedal (1).

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