A soil sampling device for farmland improvement

Abstract

This utility model relates to the field of soil sampling and discloses a soil sampling device for farmland improvement. It includes a control plate and a support base arranged vertically, with a lifting mechanism between the support base and the control top plate. The support base has a sampling hole. A rotating shaft is rotatably connected to the bottom surface of the control top plate, and a drill bit is fixedly connected to the lower end of the rotating shaft. The device also includes a sampling cylinder slidably sleeved around the drill bit, with an open bottom surface. The sampling cylinder includes sampling half-cylinders arranged on both sides, each half-cylinder having a semi-circular through-hole at its upper end that mates with the rotating shaft. A pressure plate is slidably connected below the control top plate, and a fixed column coaxially arranged with the rotating shaft is rotatably connected to the bottom surface of the pressure plate. A sliding hole mates with the rotating shaft is provided at the center of the fixed column and on the pressure plate. A hydraulic cylinder is fixedly connected to the control top plate to drive the pressure plate to slide up and down. Compared with existing technologies, this utility model has the advantage of being able to sample soil from specific soil layers, resulting in a more complete sample soil structure.

Description

Technical Field

[0001] This utility model relates to the field of soil sampling technology, specifically to a soil sampling device for farmland improvement. Background Technology

[0002] In fields such as farmland improvement, geological exploration, and environmental monitoring, obtaining undisturbed, original soil samples at a specific depth is crucial for accurate analysis of soil structure, fertility stratification, and pollutant migration.

[0003] Traditional soil sampling methods mainly fall into two categories: one is rotary drilling using a drill rod, where the drill bit is driven in to extract soil; the other is using a forced-in sampling tube, where a hollow sampling tube is vertically pressed into the soil using manual or mechanical pressure, and then pulled out as a whole to obtain a columnar sample. During rotary drilling, the drill bit blades in the drill rod sampling method generate strong agitation and mixing with the soil, disrupting the original stratified soil structure and causing soil samples from different depths to mix. This results in a sample that cannot accurately represent the soil conditions at a specific target depth. While the forced-in sampling tube can obtain a columnar sample, it cannot sample specific soil layers further down the line. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide a soil sampling device for farmland improvement, which can sample soil from specific soil layers and the sampled soil structure is more complete.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a soil sampling device for farmland improvement, comprising a control plate and a support base arranged vertically and vertically, a lifting mechanism between the support base and the control top plate, a sampling hole on the support base, a rotating shaft rotatably connected to the bottom surface of the control top plate, a drill bit fixedly connected to the lower end of the rotating shaft, and a first motor for driving the rotating shaft to rotate fixedly connected to the upper end of the control top plate; it also includes a sampling cylinder slidably sleeved outside the drill bit, the bottom surface of the sampling cylinder being an open end, the sampling cylinder including sampling half-cylinders arranged on both sides, each sampling half-cylinder having a semi-circular through hole at its upper end that cooperates with the rotating shaft, a pressure plate slidably connected below the control top plate, a fixed column rotatably connected to the bottom surface of the pressure plate and arranged coaxially with the rotating shaft, a sliding hole cooperating with the rotating shaft being provided at the center of the fixed column and on the pressure plate, a hydraulic cylinder for driving the pressure plate to slide up and down fixedly connected to the control top plate, and a fixing mechanism between the sampling half-cylinders on both sides and the fixed column.

[0006] As an improvement, the lifting mechanism includes limiting slide rods fixedly connected to the four corners of the support base, and limiting slide holes that cooperate with the limiting slide rods are provided at the four corners of the control top plate. A lifting screw is rotatably connected to the support base, and a lifting screw hole that cooperates with the lifting screw is provided through the control top plate. A second motor that drives the lifting screw to rotate is fixedly connected to the support base.

[0007] As an improvement, the fixing mechanism includes an arc-shaped fixing plate fixedly connected to the upper end of the sampling half-cylinder. Both sides of the fixing column are provided with fixing slots that cooperate with the arc-shaped fixing plate. The arc-shaped fixing plate is threaded with a through-type fixing bolt. The inner wall of the fixing slot is provided with fixing screw holes that cooperate with the fixing bolts.

[0008] As an improvement, a connecting magnetic sheet is provided at one end of each of the two sampling half-cylinders.

[0009] As an improvement, a fan-shaped baffle is slidably inserted inside the sampling half-cylinder, and a connecting block is fixedly connected to one end of the fan-shaped baffle. The inner wall of the sampling half-cylinder is provided with at least one connecting slot arranged along the height direction that mates with the connecting block.

[0010] The advantages of this invention compared to existing technologies are as follows: This invention innovatively designs the drill bit and sampling cylinder as two relatively independent yet collaborative parts. The drill bit rotates at high speed under the drive of a first motor, responsible for breaking up the soil and drilling to the target depth. By first drilling to the top of the target soil layer, and then separately pressing the sampling cylinder into the fresh soil layer below, undisturbed by the drill bit, precise and pure sampling of soil layers at a specific depth is achieved, completely solving the problem of soil mixing in traditional drilling sampling. Attached Figure Description

[0011] Figure 1 This is an exploded view of a soil sampling device for farmland improvement according to this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of a soil sampling device for farmland improvement according to this utility model.

[0013] Figure 3 This is a cross-sectional view of a soil sampling device for farmland improvement according to this utility model.

[0014] Figure 4 This is an enlarged view of point A of a soil sampling device for farmland improvement according to this utility model.

[0015] Figure 5 This is a structural diagram of a soil sampling device for farmland improvement according to this utility model.

[0016] Figure 6This is a structural diagram of the pressure plate of a soil sampling device for farmland improvement according to this utility model.

[0017] Figure 7 This is a structural diagram of a sampling half-cylinder for a soil sampling device used in farmland improvement according to this utility model.

[0018] As shown in the figure: 1. Support base; 2. Control top plate; 3. Limiting slide bar; 4. Rotating shaft; 5. First motor; 6. Sampling half-cylinder; 7. Arc-shaped fixing plate; 8. Pressure plate; 9. Hydraulic cylinder; 10. Fixing column; 11. Lifting screw; 12. Second motor; 13. Fan-shaped baffle; 14. Connecting block; 15. Connecting slot; 16. Drill bit; 17. Sampling hole; 18. Fixing bolt; 19. Fixing slot; 20. Fixing screw hole; 21. Connecting magnetic plate. Detailed Implementation

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

[0020] like Figures 1 to 7 As shown, a soil sampling device for farmland improvement includes a control plate and a support base 1 arranged vertically. A lifting mechanism is provided between the support base 1 and the control top plate 2. The lifting mechanism includes limiting slide rods 3 fixedly connected to the four corners of the support base 1. Each of the four corners of the control top plate 2 is provided with limiting slide holes that cooperate with the limiting slide rods 3. A lifting screw 11 is rotatably connected to the support base 1. A lifting screw hole that is arranged through the control top plate 2 and cooperates with the lifting screw 11 is provided. A second motor 12 that drives the lifting screw 11 to rotate is fixedly connected to the support base 1. A sampling hole 17 is provided on the support base 1.

[0021] The control top plate 2 is rotatably connected to a rotating shaft 4 at its bottom surface. A drill bit 16 is fixedly connected to the lower end of the rotating shaft 4. A first motor 5, which drives the rotating shaft 4, is fixedly connected to the upper end of the control top plate 2. The control top plate 2 also includes a sampling cylinder slidably sleeved around the drill bit 16. The bottom surface of the sampling cylinder is open. The sampling cylinder includes sampling half-cylinders 6 arranged on both sides. Each sampling half-cylinder 6 has a sharp cutting edge at its lower end. A connecting magnetic plate 21 is provided at one opposite end of each sampling half-cylinder 6. Each sampling half-cylinder 6 has a semi-circular through hole at its upper end that mates with the rotating shaft 4. A pressure plate 8 is slidably connected below the control top plate 2. The bottom surface of the pressure plate 8 is rotatably connected to a component that is identical to the rotating shaft 4. A fixed column 10 is arranged along the axis. The center of the fixed column 10 and the pressure plate 8 are provided with sliding holes that cooperate with the rotating shaft 4. A hydraulic cylinder 9 that drives the pressure plate 8 to slide up and down is fixedly connected to the control top plate 2. A fixing mechanism is provided between the sampling half-cylinder 6 on both sides and the fixed column 10. The fixing mechanism includes an arc-shaped fixing plate 7 fixedly connected to the upper end of the sampling half-cylinder 6. The fixed column 10 is provided with fixing slots 19 on both sides that cooperate with the arc-shaped fixing plate 7. A through fixing bolt 18 is threadedly connected to the arc-shaped fixing plate 7. The inner wall of the fixing slot 19 is provided with fixing screw holes 20 that cooperate with the fixing bolt 18.

[0022] A fan-shaped baffle 13 is slidably inserted inside the sampling half-cylinder 6. A connecting block 14 is fixedly connected to one end of the fan-shaped baffle 13. The inner wall of the sampling half-cylinder 6 is provided with at least one connecting slot 15 arranged along the height direction to cooperate with the connecting block 14. By adjusting the position of the fan-shaped baffles 13 on both sides, the amount of soil sampled can be limited in advance.

[0023] In practical use, firstly, the device is moved to the farmland to be sampled and placed stably on the support base 1, ensuring that the sampling hole 17 on the base is aligned with the sampling point. Drilling is then performed above the target layer. First, ensure that the pressure plate 8 is in the raised position and the fixing bolts 18 on both sides are tightened, so that the sampling half-cylinder 6 is securely connected to the fixing column 10 via the arc-shaped fixing insert 7. At this time, the bottom end of the sampling cylinder wraps around the upper end of the drill bit 16. The second motor 12 is started, driving the lifting screw 11 to rotate, causing the control top plate 2 and all components below it to move downwards along the limit slide bar 3 until the drill bit 16 contacts the ground. The first motor 5 is then started, driving the rotating shaft 4 to rotate, thereby causing the fixing column 10, the drill bit 16, and the sampling cylinder connected by the fixing mechanism to rotate synchronously. The second motor 12 continues to work, causing the drill bit 16 to continue drilling downwards. The drill bit 16 is responsible for breaking the soil and creating a guide hole. The drilling depth is precisely controlled by controlling the descent distance of the lifting mechanism.

[0024] When the tip of drill bit 16 reaches above the target soil layer, the second motor 12 and the first motor 5 are stopped, drilling ceases, and the hydraulic cylinder 9 is activated, driving the pressure plate 8 to slide downwards. The pressure plate 8, along with the fixed column 10, moves downwards together. The sampling tube is then inserted vertically downwards along the drilled hole into the undisturbed target soil layer below, completing the soil sample collection. After the sampling tube is in place, the hydraulic cylinder 9 is operated to lift the pressure plate 8 and the fixed column 10. Subsequently, the second motor 12 is reversed, driving the lifting mechanism to raise the entire control top plate 2 and the components below it above ground level.

[0025] Lay the device flat so that the sampling tube is parallel to the ground. Place the sample tray on the bottom of the sampling tube and unscrew the two fixing bolts 18. Disconnect the arc-shaped fixing plates 7 on both sides from the fixing column 10. At this time, the two half-tubes are still closed together under the magnetic force. After placing the sampling tube stably, manually separate the two sampling half-tubes 6 to expose the complete, undisturbed columnar soil sample inside, which can be directly observed, sealed, or sent for testing.

[0026] All standard parts used in this utility model can be purchased from the market, and irregular 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 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.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0028] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A soil sampling device for farmland improvement, comprising a control plate and a support base (1) arranged vertically, a lifting mechanism between the support base (1) and the control top plate (2), and a sampling hole (17) on the support base (1), characterized in that: The bottom surface of the control top plate (2) is rotatably connected to a rotating shaft (4), the lower end of the rotating shaft (4) is fixedly connected to a drill bit (16), and the upper end of the control top plate (2) is fixedly connected to a first motor (5) that drives the rotating shaft (4) to rotate. It also includes a sampling cylinder that is slidably sleeved outside the drill bit (16). The bottom surface of the sampling cylinder is an open end. The sampling cylinder includes sampling half cylinders (6) arranged on both sides. The upper end of each sampling half cylinder (6) is provided with a semi-circular through hole that cooperates with the rotating shaft (4). A pressure plate (8) is slidably connected below the control top plate (2). A fixed column (10) arranged coaxially with the rotating shaft (4) is rotatably connected to the bottom surface of the pressure plate (8). The center of the fixed column (10) and the pressure plate (8) are provided with sliding holes that cooperate with the rotating shaft (4). A hydraulic cylinder (9) that drives the pressure plate (8) to slide up and down is fixedly connected to the control top plate (2). A fixing mechanism is provided between the sampling half cylinders (6) on both sides and the fixed column (10).

2. The soil sampling device for farm field construction according to claim 1, characterized in that: The lifting mechanism includes limiting slide rods (3) fixedly connected to the four corners of the support base (1). The four corners of the control top plate (2) are provided with limiting slide holes that cooperate with the limiting slide rods (3). A lifting screw (11) is rotatably connected to the support base (1). The control top plate (2) is provided with a through-hole that cooperates with the lifting screw (11). A second motor (12) that drives the lifting screw (11) to rotate is fixedly connected to the support base (1).

3. The soil sampling device for farm field construction according to claim 1, characterized in that: The fixing mechanism includes an arc-shaped fixing plate (7) fixedly connected to the upper end of the sampling half-cylinder (6). The fixing column (10) has fixing slots (19) on both sides that cooperate with the arc-shaped fixing plate (7). The arc-shaped fixing plate (7) is threaded with a through-type fixing bolt (18). The inner wall of the fixing slot (19) is provided with fixing screw holes (20) that cooperate with the fixing bolts (18).

4. The soil sampling device for field reformation according to claim 1, characterized in that: The sampling half-cylinders (6) on both sides are provided with connecting magnetic plates (21) at opposite ends.

5. The soil sampling device for field reformation according to claim 1, characterized in that: A fan-shaped baffle (13) is slidably inserted inside the sampling half-cylinder (6). A connecting block (14) is fixedly connected to one end of the fan-shaped baffle (13). The inner wall of the sampling half-cylinder (6) is provided with at least one connecting slot (15) arranged along the height direction to cooperate with the connecting block (14).

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