A soil nutrient detection sampling device

Abstract

The embodiment of the present disclosure provides a soil nutrient detection sampling device, which comprises: a sampling drill bit, which is used for drilling into soil and cutting a soil sample; a rotating shaft, which is connected to the sampling drill bit; a sampling tube, which is sleeved outside the sampling drill bit and is used for collecting the soil sample; an anti-winding cover, which is arranged at the base of the sampling drill bit; and a handle, which is fixed to the top of the rotating shaft; wherein the anti-winding cover comprises: an annular base, which is fixed to the rotating shaft and is located above the sampling drill bit; a plurality of groups of cutting teeth, which extend radially outward from the outer periphery of the annular base; and a gap adjusting ring, which is rotatably installed on the annular base and is used for adjusting the gap between the anti-winding cover and the sampling tube. Through the scheme of the embodiment of the present disclosure, the sampling continuity can be prevented from being interfered by roots or impurities.

Description

Technical Field

[0001] This application relates to the field of agricultural testing instrument technology, specifically to a soil nutrient testing and sampling device. Background Technology

[0002] A soil nutrient testing sampling device is a device used to obtain soil samples for nutrient content analysis. It typically collects representative samples by inserting a mechanical probe or drill bit into the soil layer. However, this device has a technical problem: how to avoid root systems or impurities interfering with the continuity of sampling. For example, plant roots or small stones in the soil may block the sampling channel or cause the sampling process to be interrupted, thus affecting the consistency and accuracy of the samples. Summary of the Invention

[0003] In view of this, the present disclosure provides a soil nutrient detection sampling device, which at least partially solves the problems existing in the prior art.

[0004] This application discloses a soil nutrient testing and sampling device, comprising:

[0005] Sampling drill bits are used to drill into the soil and cut soil samples;

[0006] A rotating shaft is connected to the sampling drill bit;

[0007] A sampling tube, fitted over the outside of the sampling drill bit, is used to collect soil samples;

[0008] An anti-entanglement cover is provided at the base of the sampling drill bit;

[0009] A handle is fixed to the top of the rotating shaft; wherein,

[0010] The anti-winding cover includes:

[0011] An annular base is fixed to the rotating shaft and located above the sampling drill bit;

[0012] Multiple sets of cutting teeth extend radially outward from the outer periphery of the annular base;

[0013] A gap adjustment ring, rotatably mounted on the annular base, is used to adjust the gap between the anti-tangle cover and the sampling tube.

[0014] In one specific embodiment, the tip of the sampling drill bit protrudes below the anti-tangle cover to cut the root system in a timely manner when drilling into the soil.

[0015] In one specific embodiment, the surface of the sampling drill bit is provided with spiral grooves to guide the soil sample upward into the sampling tube.

[0016] In one specific embodiment, the rotating shaft is fixed to the sampling drill bit by a nut to stably transmit rotational force.

[0017] In one specific embodiment, a dust cover is fitted onto the rotating shaft to grip and prevent soil particles from entering the rotating component.

[0018] In one specific embodiment, a gap is left between the surface of the sampling tube and the cutting teeth of the anti-tangle cover.

[0019] In one embodiment, the sampling tube is made of a transparent material to facilitate observation of the sample collection process.

[0020] In one specific embodiment, the cutting teeth are triangular in shape, evenly distributed on the outer periphery of the annular base, with the cutting edge facing the direction of rotation.

[0021] In one specific embodiment, the gap adjusting ring is provided with a locking screw to fix the adjusted position and prevent loosening.

[0022] In one specific embodiment, the handle is fixed to the top of the rotating shaft by a quick-release connector, which includes a snap-lock mechanism and a spring-loaded release button, and is fixed by a protrusion on the top of the rotating shaft and a groove on the bottom of the handle.

[0023] This disclosure provides a soil nutrient testing sampling device, comprising: a sampling drill bit for drilling into soil and cutting soil samples; a rotating shaft connected to the sampling drill bit; a sampling tube sleeved on the outside of the sampling drill bit for collecting soil samples; an anti-tangle cover disposed at the base of the sampling drill bit; and a handle fixed to the top of the rotating shaft. The anti-tangle cover includes: an annular base fixed to the rotating shaft and located above the sampling drill bit; multiple sets of cutting teeth extending radially outward from the outer periphery of the annular base; and a gap adjustment ring rotatably mounted on the annular base for adjusting the gap between the anti-tangle cover and the sampling tube. The solution provided by this disclosure addresses how to prevent root systems or impurities from interfering with the continuity of sampling. Attached Figure Description

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0025] Figure 1 This is a front view of the soil nutrient detection and sampling device described in this utility model;

[0026] Figure 2 This is a right view of the soil nutrient detection and sampling device described in this utility model;

[0027] Figure 3 yes Figure 2 Sectional view at point AA;

[0028] Figure 4 This is a bottom view of the sampling tube in the soil nutrient detection sampling device described in this utility model;

[0029] Figure 5 This is a bottom view of the anti-tangling cover in the soil nutrient detection and sampling device described in this utility model.

[0030] In the diagram: 1. Sampling drill bit; 11. Spiral groove; 2. Rotating shaft; 21. Nut; 22. Dust cover; 3. Sampling tube; 4. Anti-winding cover; 41. Annular base; 42. Cutting teeth; 43. Gap adjusting ring; 44. Locking screw; 5. Handle; 51. Quick-release connector Detailed Implementation

[0031] 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] like Figures 1-5 As shown, a soil nutrient testing sampling device of this application includes a sampling drill bit 1, a rotating shaft 2, a sampling tube 3, an anti-tangling cover 4, and a handle 5. Through optimized structural design, this device effectively solves the technical problem of root or impurity interference with sampling continuity during soil sampling, ensuring smooth sampling operations.

[0033] The sampling drill bit 1 is located at the bottom of the device and is used to drill into the soil and cut soil samples. Its installation position is directly connected to the lower end of the rotating shaft 2 via a fixed connection, ensuring efficient transmission of rotational force. Structurally, it adopts a helical cutting edge design, made of cemented carbide material to enhance wear resistance and cutting efficiency. The connection method is threaded or keyway fit, facilitating disassembly and replacement. From a technical implementation perspective, for example, by setting 11 helical grooves, the soil sample is guided upwards to avoid sample blockage, and the drill bit tip can be equipped with replaceable blades to adapt to different soil hardness levels.

[0034] The rotating shaft 2 passes through the center of the device and is used to transmit rotational force to the sampling drill bit 1. Its installation position is that the top is fixed to the handle 5 and the bottom is connected to the sampling drill bit 1; structurally, it is designed as a cylindrical shaft, with internal bearings or lubrication systems to reduce friction; the connection method uses a rigid coupling or flange connection to ensure stable torque transmission. Technically, for example, the shaft is made of high-strength stainless steel, and the surface is heat-treated to improve torsional strength; it also achieves synchronous rotation with the sampling drill bit 1 through a spline groove to prevent slippage.

[0035] The sampling tube 3 is fitted around the sampling drill bit 1 to collect and contain soil samples. It is installed around the sampling drill bit 1, forming an annular cavity. Structurally, it is a tubular container with a smooth inner wall and graduated lines for measuring sample volume. The connection is made via a sliding fit or snap-fit ​​mechanism to maintain an adjustable gap with the anti-winding cover 4. Technically, the tube body is made of transparent polycarbonate material for easy observation of the sample condition, and the bottom opening is designed to be retractable for convenient sealing and preservation after sample removal.

[0036] An anti-entanglement cover 4 is installed at the base of the sampling drill bit 1 to prevent roots or impurities from becoming entangled on the rotating components. It is fixed to the rotating shaft 2, located above the sampling drill bit 1; its structure includes an annular base 41, multiple cutting teeth 42, and a gap adjustment ring 43; the connection method is bolt fixing or welding to ensure overall stability. This cover reduces the entry of impurities into the rotating area through isolation and cutting functions.

[0037] The annular base 41, as the core component of the anti-entanglement cover 4, is fixed to the rotating shaft 2 and located above the sampling drill bit 1, providing support and isolating impurities. Its installation position is centrally located, covering the rotating shaft 2; its structure is an annular disc with internal mounting holes; the connection is achieved by screws or an interference fit to secure it to the rotating shaft 2. Technically, for example, the base is made of lightweight aluminum alloy with a thickness of 5-10mm to withstand axial loads and prevent soil debris from entering.

[0038] Multiple cutting teeth 42 extend radially outward from the outer periphery of the annular base 41 to cut entangled roots. They are evenly distributed along the edge of the base; the structure consists of serrated blades of adjustable length; and they are connected to the base by welding or bolting. Technically, for example, the cutting teeth 42 are made of high-carbon steel, with the tooth tip angle optimized to 30-45 degrees to efficiently cut plant roots without damaging the sampling tube 3.

[0039] The gap adjustment ring 43 is rotatably mounted on the annular base 41 and is used to adjust the gap between the anti-winding cover 4 and the sampling tube 3 to prevent impurities from getting stuck. Its mounting position surrounds the annular base 41; its structure is a threaded ring-shaped component; the connection method achieves rotatable installation through threaded engagement or ball bearings. Technically, for example, the adjustment ring has scale markings, allowing the user to change the distance between the ring and the sampling tube 3 (e.g., an adjustable range of 0.5-2 mm) when rotating the ring, thereby adapting to different soil conditions and preventing small impurities from clogging the gap.

[0040] The handle 5 is fixed to the top of the rotating shaft 2 and is used for manual operation. Its mounting position is at the upper end of the rotating shaft 2; the structure is designed as a T-shaped or L-shaped grip with a non-slip textured surface; the connection is made to the rotating shaft 2 via a keyway or thread. For example, the handle 5 integrates a bearing for the rotating shaft 2 internally to reduce operating resistance, and uses engineering plastics to reduce weight, ensuring user comfort during extended operation.

[0041] This feature addresses the technical challenge of preventing root or impurity interference with sampling continuity through the coordinated design of the anti-tangle cover 4 and its sub-components. Specifically, the annular base 41 of the anti-tangle cover 4 provides physical isolation, blocking impurities from approaching the rotating shaft 2 and the sampling drill bit 1, ensuring uninterrupted sampling. Multiple cutting teeth 42 actively cut off tangled roots, preventing their accumulation and clogging of the device. The gap adjustment ring 43 allows dynamic adjustment of the gap with the sampling tube 3, preventing soil particles or roots from getting stuck, thereby maintaining sampling continuity. For example, in root-rich soils, the cutting teeth 42 cut the roots in real time, while the adjustment ring optimizes the gap, allowing the sampling tube 3 to collect samples smoothly, significantly reducing cleaning frequency and sampling interruptions.

[0042] like Figure 2As shown, in one embodiment, in the soil nutrient testing sampling device, the tip of the sampling drill bit 1 is configured to protrude below the anti-winding cover 4, thereby ensuring that the anti-winding cover 4 can cut the roots in a timely manner during drilling into the soil. Specifically, this positional relationship is achieved by the end portion of the sampling drill bit 1 extending vertically below the bottom edge of the anti-winding cover 4. The anti-winding cover 4 is fixed to the rotating shaft 2 and is disposed in the base region of the sampling drill bit 1, wherein an annular base 41 is located above the sampling drill bit 1 as a support structure, and the cutting teeth 42 extend radially outward from the base. This arrangement ensures that when the sampling drill bit 1 first cuts into the soil, the cutting teeth 42 of the anti-winding cover 4 follow closely behind, effectively cutting the roots or impurities before they come into contact with the rotating components.

[0043] For example, the sampling drill bit 1 is directly connected to the bottom end of the rotating shaft 2, while the annular base 41 of the anti-winding cover 4 is fixed on the rotating shaft 2 and located above the sampling drill bit 1, thus ensuring that the tip of the sampling drill bit 1 naturally protrudes. The gap adjustment ring 43 is rotatably mounted on the annular base 41 to finely adjust the gap between the anti-winding cover 4 and the sampling tube 3 to avoid interference from impurities, but the core positional relationship remains unchanged so that the sampling drill bit 1 is given priority during the drilling action, and then the anti-winding cover 4 performs the cutting function.

[0044] Specifically, the sampling drill bit 1 is designed with its axial length so that the tip protrudes below the anti-winding cover 4. The sampling drill bit 1 is fixed to the end of the rotating shaft 2. The annular base 41 of the anti-winding cover 4 is sleeved on the rotating shaft 2 and located at the base above the sampling drill bit 1. The cutting teeth 42 extend radially from the outer periphery of the base and the gap between the cutting teeth and the sampling tube 3 is adjusted by the gap adjustment ring 43, thereby ensuring that the anti-winding cover 4 can cut the root system in time when drilling into the soil.

[0045] like Figure 3 As shown, in one embodiment, a spiral groove 11 is provided on the outer surface of the sampling drill bit 1. The spiral groove 11 is designed as a continuous groove, and its shape can be V-shaped or U-shaped to optimize the flow path of the soil sample. The spiral groove 11 covers the entire working length of the sampling drill bit 1, extending from the drill tip to the inlet area of ​​the sampling tube 3, ensuring effective guidance of the soil sample as the drill bit rotates.

[0046] For example, the spiral groove 11 is installed directly on the metal surface of the sampling drill bit 1 as an integral part of it. The depth and width of the groove are designed according to the soil type to minimize resistance and improve guiding efficiency. For example, the pitch of the groove can be adjusted to match the rotation speed, thereby forming an upward transport channel during sampling. Structurally, the spiral groove 11 is arranged in a single or multiple lines, and the groove edges are smoothed to reduce soil sample retention.

[0047] This design allows the spiral groove 11 to generate centrifugal force as it rotates, pushing the soil sample upwards into the sampling tube 3. Simultaneously, the continuous path of the groove repels larger impurities such as small stones or roots, preventing their accumulation within the groove. While not directly connected to other components, this design works synergistically with the sampling tube 3 through its positional relationship to ensure smooth sample entry into the collection area.

[0048] Specifically, the sampling drill bit 1 has a spiral groove 11 formed on its surface by machining, for example, by using a CNC milling machine to carve grooves on the outer surface of the drill bit. The groove depth is 2-5 mm and the pitch is 10-20 mm. The groove extends continuously from the tip of the drill bit to the connection with the sampling tube 3, so as to guide the soil to flow upward and filter impurities during operation.

[0049] like Figure 3 As shown, in one embodiment, the rotating shaft 2 is fixed to the sampling drill bit 1 by a nut 21 to achieve stable transmission of rotational force. Specifically, the nut 21 is located at the connection interface between the rotating shaft 2 and the sampling drill bit 1 for mechanical fastening. The nut 21 is installed via a threaded engagement, meaning that one end of the rotating shaft 2 is machined with external threads, and the nut 21 is tightened onto the threaded portion, thereby clamping the corresponding connection end of the sampling drill bit 1. This fixing structure ensures no loosening during rotational operation and avoids offset or vibration during force transmission.

[0050] The nut 21 is installed in the direct contact area between the rotating shaft 2 and the sampling drill bit 1, facilitating disassembly and replacement during maintenance. For example, the nut 21 can be a standard hexagonal nut type, with dimensions adapted to the thread diameter of the rotating shaft 2 to provide sufficient clamping force. Furthermore, this fixing method allows the rotational force to be evenly distributed along the axial direction, reducing stress concentration and improving the overall reliability of the device.

[0051] The rotating shaft 2 is fixed to the sampling drill bit 1 by a nut 21. Specifically, the end of the rotating shaft 2 is provided with an external thread. The nut 21 is tightened on the thread and mates with the internal thread interface of the sampling drill bit 1. A predetermined torque is applied by a torque wrench to tighten the nut 21, forming a rigid connection, thereby ensuring efficient transmission of rotational force.

[0052] like Figures 1-3As shown, in one embodiment, a dust cover 22 is configured to be fitted over the rotating shaft 2 to form a physical barrier, preventing external soil particles from intruding into the rotating component. The dust cover 22 is typically located on the outer surface of the rotating shaft 2, particularly near its connection to the sampling drill bit 1, a location susceptible to soil splashing and particle impact during operation. By isolating the moving parts of the rotating shaft 2, the dust cover 22 effectively reduces the possibility of soil contaminants entering the bearings or transmission mechanism, thereby avoiding mechanical jamming or wear problems caused by particle accumulation. Its design must balance flexibility and wear resistance to accommodate the dynamic movement of the rotating shaft 2 while withstanding the abrasive effects of the soil environment.

[0053] Specifically, the dust cover 22 can be made of synthetic rubber or thermoplastic elastomer material, and has an annular cylindrical shape that tightly wraps around the outer periphery of the rotating shaft 2. During installation, the sleeve is fixed to the non-rotating fixed section of the rotating shaft 2 by end flanges or embedded grooves, ensuring that it does not shift or fall off under high-speed rotation. In addition, the wall thickness and sealing lip design of the dust cover 22 can be optimized, for example, by adopting a labyrinth seal structure, to further enhance the barrier effect and prevent fine particles from penetrating.

[0054] For example, the dust cover 22 is specifically implemented as an elastic polymer sleeve, which is directly sleeved on the outside of the rotating shaft 2, for example, by interference fit in the near-end region of the rotating shaft 2. Specifically, the sleeve has annular flanges at both ends, which are respectively engaged with the shoulder and the retaining ring of the rotating shaft 2, thereby forming a continuous covering layer to prevent soil particles from intruding into the gaps of the rotating components.

[0055] like Figure 3 As shown, in one embodiment, the sampling tube 3 is configured to be fitted over the outside of the sampling drill bit 1 to accommodate the collected soil sample. An anti-entanglement cover 4 is disposed at the base of the sampling drill bit 1, and includes an annular base 41 and a plurality of cutting teeth 42. The annular base 41 is fixed to the rotating shaft 2, and the cutting teeth 42 extend radially outward from the outer periphery of the annular base 41 to cut any roots or other impurities that may become entangled. A predetermined gap is designed between the surface of the sampling tube 3 and the cutting teeth 42 of the anti-entanglement cover 4, the gap being designed to prevent impurities from getting stuck or blocking the moving parts of the device.

[0056] Specifically, the formation of this gap depends on the relative position and structural design of the components. Specifically, the radial extension length of the cutting teeth 42 is set to maintain a certain distance between the outer wall of the sampling tube 3 and the tooth tip. The anti-entanglement cover 4 also includes a gap adjustment ring 43, which is rotatably mounted on the annular base 41. By adjusting the rotation of the ring, the gap size of the cutting teeth 42 relative to the surface of the sampling tube 3 can be finely adjusted, thereby adapting to different soil conditions and preventing the accumulation of foreign objects.

[0057] For example, the gap adjustment ring 43 can be manually rotated to change its axial position on the annular base 41, thereby causing the overall position of the cutting teeth 42 to shift, so as to achieve precise adjustment of the gap between the surface of the sampling tube 3 and the cutting teeth 42. For example, the position of the adjustment ring can be fixed by a threaded mechanism or a slotted engagement method to ensure that the gap is always maintained within the preset range.

[0058] In one embodiment, the sampling tube 3 is designed to be fitted over the sampling drill bit 1 for collecting and containing soil samples. The sampling tube 3 is made of a transparent material, a design that allows the operator to directly observe the sample collection process within the tube, enabling real-time monitoring of sample filling levels. The transparency of the sampling tube 3 facilitates visual inspection during sampling without interrupting the operation or using additional tools. The fitted connection between the sampling tube 3 and the sampling drill bit 1 ensures stable fixation, preventing sample leakage or displacement during rotation. The wall thickness and shape of the sampling tube 3 are optimized to maintain structural strength while providing a clear view, facilitating timely cessation of sampling when the sample volume approaches its maximum capacity. This transparent structure directly reduces the risk of oversampling, preventing sample blockage of the internal channels of the sampling tube 3.

[0059] Specifically, the transparent material of sampling tube 3 is selected with consideration for abrasion resistance and chemical stability to withstand corrosion from the soil environment. The inner surface of sampling tube 3 is kept smooth to reduce sample adhesion and ensure smooth sample flow. One end of sampling tube 3 fits tightly against sampling drill bit 1 via a sleeve, while the other end extends to the vicinity of anti-tangle cover 4, forming a continuous collection space. The length and diameter of sampling tube 3 are configured to match the size of sampling drill bit 1 to ensure uniform sample distribution.

[0060] like Figure 5 As shown, in one embodiment, the cutting teeth 42 employ a triangular tooth structure, evenly arranged on the outer periphery of the annular base 41. This design causes the cutting teeth 42 to extend radially outward from the annular base 41, forming a continuous cutting array. The triangular tooth structure includes a sharp cutting edge oriented towards the direction of rotation of the device to preferentially contact and cut entangled roots or other impurities during rotation. The uniform distribution ensures that the cutting force is applied evenly across the entire circumference, avoiding localized overload or efficiency loss. Specifically, the triangular teeth enhance the continuity and stability of the cutting action by optimizing tooth angle and tooth height parameters, thereby improving overall cutting performance.

[0061] Specifically, the cutting teeth 42 are integrally formed on the annular base 41 by a stamping process. Specifically, the triangular profile of each tooth is designed with an included angle of 45 to 60 degrees, and the cutting edge is ground to form a sharp edge and is precisely installed in the clockwise rotation direction to achieve efficient cutting of the root system without damaging other parts.

[0062] like Figure 1 and Figure 4 As shown, in one embodiment, the gap adjusting ring 43 is provided with a locking screw 44 for fixing its position after adjusting the gap between the anti-winding cover 4 and the sampling tube 3, preventing loosening. The locking screw 44 is configured to be operably mounted on the gap adjusting ring 43 and ensures that the gap adjusting ring 43 remains stable after rotational adjustment through a mechanical locking mechanism. Specifically, the locking screw 44 is fixed to the appropriate position of the gap adjusting ring 43 by a threaded connection, such as at an opening in the side wall or top. When the user rotates the gap adjusting ring 43 to the desired angle to optimize the gap, the locking screw 44 can be tightened to apply pressure or form an interference lock. This design avoids accidental rotation due to vibration or external forces during device operation, thereby maintaining the accuracy of the gap.

[0063] Specifically, the end of the locking screw 44 can contact the surface of the annular base 41 or be embedded in its groove to achieve a reliable fixed connection. The locking screw 44 typically adopts a standard screw structure, such as an internal hexagon or Phillips head design, making it easy for users to operate with tools. In this way, the locking screw 44 provides a simple and effective locking solution, ensuring that the gap adjusting ring 43 will not loosen after adjustment.

[0064] For example, the gap adjusting ring 43 is provided with a threaded hole, into which the locking screw 44 is screwed. Specifically, when the user manually rotates the gap adjusting ring 43 to adjust the gap between it and the sampling tube 3, after reaching the predetermined position, the locking screw 44 is tightened so that its tip presses against the corresponding surface of the annular base 41, thereby fixing the position. For example, the tightening action of the locking screw 44 generates frictional resistance or mechanical interference, preventing the gap adjusting ring 43 from rotating further.

[0065] like Figure 2 and Figure 3 As shown, in one embodiment, the handle 5 is detachably fixed to the top of the rotating shaft 2 via a quick-release connector 51. This connection method allows the handle 5 to be quickly separated or reinstalled, facilitating replacement or maintenance during operation. Specifically, the quick-release connector 51 is located in the interface area at the top of the rotating shaft 2, through which the handle 5 is directly connected, ensuring ease and reliability of operation. This design avoids the disassembly difficulties caused by traditional fixing methods such as threaded connections or welding, improving the overall flexibility of the device.

[0066] Specifically, the quick-release connector 51 typically includes a locking mechanism and a release mechanism. The locking mechanism maintains the handle 5 rigidly fixed to the rotating shaft 2 in the connected state, preventing loosening or detachment during operation. The release mechanism allows the user to release the lock through simple operations such as pressing or rotating, enabling quick removal of the handle 5. The connector is located at the top center of the rotating shaft 2, through which the handle 5 directly transmits manual rotational force to the rotating shaft 2 while maintaining the compact structure of the device. Furthermore, the quick-release connector 51 can employ a snap-on or pin-type design to ensure the stability and durability of the connection.

[0067] In one embodiment, the quick-release connector 51 includes a snap-locking mechanism and a spring-loaded release button. Specifically, the top of the rotating shaft 2 is provided with a protruding structure, and the bottom of the handle 5 is provided with a matching groove. By pressing the release button, the locking mechanism is unlocked, and the handle 5 can be easily separated from the rotating shaft 2 for easy replacement or maintenance.

[0068] In actual operation, when this device is used, the operator holds the handle 5 and applies manual rotational force. This rotational force is transmitted to the sampling drill bit 1 through the rotating shaft 2, driving the sampling drill bit 1 to drill into the soil and cut the soil sample. The cut soil sample is collected and contained in the sampling tube 3, which is fitted outside the sampling drill bit 1. At the same time, the anti-winding cover 4 set at the base of the sampling drill bit 1 prevents roots or impurities from getting tangled on the rotating part. Its annular base 41 is fixed on the rotating shaft 2 and provides support. Multiple cutting teeth 42 extend radially outward from the outer periphery of the annular base 41 to cut the tangled roots. The gap adjustment ring 43 is rotatably mounted on the annular base 41 to adjust the gap between the anti-winding cover 4 and the sampling tube 3 to prevent impurities from getting stuck. After sampling is completed, the operator removes the device, and the soil sample is retained in the sampling tube 3.

[0069] The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of the embodiments of this disclosure. It should be understood that the above descriptions are merely specific embodiments of the embodiments of this disclosure and are not intended to limit the scope of protection of the embodiments of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this disclosure should be included within the scope of protection of the embodiments of this disclosure.

Claims

1. A soil nutrient detection and sampling device, characterized in that, include: A sampling drill bit (1) is used to drill into the soil and cut soil samples; A rotating shaft (2) is connected to the sampling drill bit (1); A sampling tube (3) is fitted over the outside of the sampling drill bit (1) for collecting soil samples; An anti-winding cover (4) is provided at the base of the sampling drill bit (1); The handle (5) is fixed to the top of the rotating shaft (2); wherein, The anti-winding cover (4) includes: An annular base (41) is fixed on the rotating shaft (2) and located above the sampling drill bit (1); Multiple sets of cutting teeth (42) extend radially outward from the outer periphery of the annular base (41); A gap adjustment ring (43) is rotatably mounted on the annular base (41) for adjusting the gap between the anti-winding cover (4) and the sampling tube (3).

2. The soil nutrient detection and sampling device according to claim 1, characterized in that: The tip of the sampling drill bit (1) protrudes below the anti-tangle cover (4) so ​​as to cut the root system in time when drilling into the soil.

3. The soil nutrient detection and sampling device according to claim 1, characterized in that: The sampling drill bit (1) has a spiral groove (11) on its surface to guide the soil sample upward into the sampling tube (3).

4. The soil nutrient detection and sampling device according to claim 1, characterized in that: The rotating shaft (2) is fixed to the sampling drill bit (1) by a nut (21) to stably transmit rotational force.

5. A soil nutrient detection and sampling device according to claim 1, characterized in that: A dust cover (22) is fitted on the rotating shaft (2) to grip and prevent soil particles from entering the rotating component.

6. The soil nutrient detection and sampling device according to claim 1, characterized in that: A gap is left between the surface of the sampling tube (3) and the cutting teeth (42) of the anti-tangle cover (4).

7. The soil nutrient detection and sampling device according to claim 1, characterized in that: The sampling tube (3) is made of transparent material to facilitate observation of the sample collection process.

8. The soil nutrient detection and sampling device according to claim 1, characterized in that: The cutting teeth (42) are triangular in shape and are evenly distributed on the outer periphery of the annular base (41), with the cutting edge facing the direction of rotation.

9. A soil nutrient detection and sampling device according to claim 1, characterized in that: The gap adjustment ring (43) is equipped with a locking screw (44) to fix the adjusted position and prevent loosening.

10. A soil nutrient detection and sampling device according to claim 1, characterized in that: The handle (5) is fixed to the top of the rotating shaft (2) by a quick-release connector (51). The quick-release connector (51) includes a snap-lock mechanism and a spring-loaded release button, and is fixed by a protrusion on the top of the rotating shaft (2) and a groove on the bottom of the handle (5).

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