A geological sample collector for land information mapping services
By incorporating deployable wall structures and axial compaction structures into the geological sample acquisition device, the problem of sample disturbance caused by borehole wall instability was solved, thus achieving the acquisition of high-quality geological samples and the accuracy of mapping data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 同济检测(济宁)有限公司
- Filing Date
- 2026-02-04
- Publication Date
- 2026-05-29
AI Technical Summary
When existing geological sampling equipment operates in loose and easily collapsible strata, the instability of the borehole wall causes sample disturbance or contamination, which cannot guarantee the originality and integrity of the sample. Furthermore, the lack of effective wall protection and compaction structures affects the accuracy of the mapping data.
Design a geological sample acquisition device that uses an expandable wall structure to actively radially compact the borehole sidewall during sampling, forming a stable support. At the end of sampling, apply axial pressure to the loose sample column in the drill pipe to initially solidify it and maintain the stability of the bedding structure.
It effectively prevents borehole wall collapse and lateral disturbance of samples, ensuring the originality and integrity of geological samples, and improving the sample quality and accuracy of subsequent analysis in land information mapping.
Smart Images
Figure CN122108669A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of soil sampling equipment technology, and in particular to a geological sample acquisition device for land information mapping services. Background Technology
[0002] Traditional geological sampling equipment often suffers from sample disturbance or contamination due to borehole wall instability when operating in loose, easily collapsible strata, failing to guarantee the originality and integrity of the samples. Existing equipment is either structurally complex and inconvenient to operate, or has limited functionality and cannot simultaneously achieve efficient drilling, reliable borehole wall protection, and convenient sampling. Therefore, there is an urgent need to develop a geological sample acquisition device that integrates borehole wall protection and sampling functions, is easy to operate, and can effectively isolate lateral disturbances, in order to meet the sample quality requirements of high-standard land information mapping.
[0003] Patent publication number CN209992205U discloses a handheld soil sampling drill. This handheld soil sampling drill is equipped with a drill bit, the upper end of which has a drill rod integrally attached, and the lower end of which has a drill bit integrally welded. An expansion ring is fitted onto the drill rod at the upper end of the drill bit. A puller is fitted onto the drill rod, with a base at the lower part of the puller. The front end of the puller is a collar, and the rear end is a lever arm, with a detachable extension arm attached to the end of the lever arm. Because only the expansion ring contacts the soil surface when the drill bit and extension rod enter the soil, while the drill rod maintains a certain gap with the soil surface, this significantly reduces resistance during drilling and pulling, and also reduces the risk of soil clogging at the threaded joint between the drill bit and the extension rod, affecting the installation and removal of the drill rod. Simultaneously, the addition of an extension arm to the puller lever arm greatly improves pulling efficiency. The addition of the expansion ring and extension arm makes drilling and pulling the drill bit easier and faster, thus improving efficiency.
[0004] The existing technology has the following drawbacks: Lack of effective borehole wall compaction structure: Existing sampler wall protection is mostly static baffle or support ring, which can only isolate the borehole wall but cannot actively compact it. Its structural design is limited to instantaneous anti-collapse, lacking radial compaction function and locking and repeated compaction mechanism linked with the sampling process. As a result, the wall protection is not firmly bonded to the surrounding loose soil. When extracting samples, the external soil is prone to collapse due to vibration, disturbing the sample sidewall, and even causing the drill to get stuck or the sample column to break, which seriously damages the integrity of the sampling and the authenticity of the in-situ information.
[0005] Lack of compaction structure for solid sample columns: After obtaining loose or moist soil columns, the samples in the drill pipe are in a loosely piled state, with unstable shape and easy to disperse. The structural design only focuses on containment and ignores the need for immediate consolidation at the end of sampling. The lack of axial compaction function makes it easy for the layered soil columns to collapse and become mixed due to gravity or friction when the sample is pushed out of the drill pipe. This destroys the original stratification structure of the soil, making it impossible for subsequent laboratory analysis to accurately reflect the true vertical sequence and physical state of the strata, and seriously reducing the accuracy of the mapping data. Summary of the Invention
[0006] Given the problems of existing technologies, such as the lack of effective wall protection structures for compacting borehole walls and the lack of compaction structures for compacting sample columns, a geological sample acquisition device for land information mapping services is proposed.
[0007] This application provides a geological sample acquisition device for land information mapping services. Its purpose is to: by setting up an expandable retaining wall structure, actively and radially compact the borehole sidewall during sampling to form a stable support, effectively preventing borehole wall collapse and lateral disturbance of the sample; by setting up a downward compaction structure, apply axial pressure to the loose sample column in the drill pipe at the end of sampling, so that it is initially consolidated and the bedding structure is stable; thereby ensuring the originality, integrity and sequence authenticity of the geological sample during extraction and transfer, greatly improving the sample quality and accuracy of subsequent analysis on which land information mapping depends.
[0008] The technical solution of the present invention is as follows: a geological sample acquisition device for land information mapping services, including a brushless motor, a drill rod installed below the brushless motor, and a drill bit installed below the drill rod, and further including an adjustment mechanism disposed inside the drill rod. The adjustment mechanism includes a locking component, a wall protection component and an inner mandrel. The locking component is located at the upper part of the drill rod, the inner mandrel is located below the locking component, and the wall protection component is located in the middle section of the drill rod. The wall protection assembly includes multiple wall protection plates. The outer wall of the drill rod has multiple fitting grooves. When the multiple wall protection plates are closed, they are respectively housed in the corresponding fitting grooves, and guide ribs are formed between two adjacent wall protection plates. When the multiple wall protection plates are unfolded, they together form a straight cylindrical wall protection.
[0009] By adopting the above scheme and setting an adjustment mechanism, the wall protection plate can be automatically deployed and locked during sampling, effectively isolating the loose soil layer from the sample. After sampling, it can be automatically reset and arranged, improving the efficiency of continuous sampling. The mechanism is simple to operate and reliable, ensuring that the wall protection can be stably formed and high-quality original samples can be obtained under different soil conditions, greatly reducing the risk of borehole wall collapse.
[0010] Furthermore, the inner arc surface of the wall panel is fixedly connected to an inclined slide, and the inner wall of the drill rod is provided with multiple inclined sliding grooves. The outer wall of the inclined slide is slidably connected to the inner wall of the corresponding inclined sliding groove.
[0011] Furthermore, a first connecting seat is fixedly connected to the side of the inclined slide away from the wall plate. The first connecting seat is located inside the drill rod, and a guide groove is provided on the top of the inclined slide.
[0012] Furthermore, a conical block is fixedly connected to the outer wall of the middle section of the inner mandrel, and a plurality of second connecting seats are fixedly connected to the bottom of the conical block. A connecting rod is rotatably connected between the second connecting seat and the corresponding first connecting seat, and the guide groove is used to guide and constrain the rotation trajectory of the connecting rod.
[0013] Furthermore, the outer wall of the drill rod is provided with multiple lower slopes and multiple upper slots. Both ends of the protective plate are provided with slanted openings. When the protective plate is closed, its slanted openings are inserted into the corresponding upper slots. When the protective plate is unfolded, its inner inclined slide moves diagonally downward along the lower slope.
[0014] By adopting the above scheme, the reliable deployment and repositioning of the retaining wall plate are achieved through the precise guidance of the inclined slide and inclined chute, and the power conversion of the conical block and connecting rod. This allows the equipment to maintain a streamlined shape during drilling to reduce resistance, and to deploy with one click to form a stable retaining wall to isolate soil interference during sampling. After sampling, the plate can be quickly repositioned and sorted, thus efficiently and reliably obtaining high-quality undisturbed soil samples and supporting continuous operation.
[0015] Furthermore, the locking assembly includes a telescopic spring fixedly connected to the inner wall of the top of the drill pipe, a connecting post fixedly connected to the bottom of the telescopic spring, and the bottom of the connecting post fixedly connected to the top of the inner mandrel.
[0016] Furthermore, a rotating column is rotatably connected to the inner wall of the connecting column, and a locking rod is fixedly connected to the inner wall of the rotating column. The inner wall of the drill rod has two centrally symmetrical vertical grooves and two locking grooves. The vertical grooves are connected to the corresponding locking grooves, and the two ends of the locking rod are respectively located in the two vertical grooves or the two locking grooves.
[0017] By adopting the above scheme and setting a locking component, reliable control of the protective wall component is achieved. Its telescopic spring and connecting column transmit the elastic force to the inner core shaft. By rotating the locking rod and switching between the vertical groove and the locking groove, reliable locking of the protective wall component in the unfolded or retracted state can be achieved.
[0018] Furthermore, a thrust plate is fixedly connected to the bottom of the inner mandrel, and the outer wall of the thrust plate is slidably connected to the inner wall of the drill rod. The thrust plate is located below the inclined groove.
[0019] Furthermore, two symmetrically arranged hand levers are fixedly connected to the outer wall of the brushless motor.
[0020] By adopting the above scheme, the movement axis of the inner mandrel is more stable by setting a thrust plate, and the pressure can be evenly transmitted to the soil below to compact the loose soil when pressing down, providing basic support for the stable development of the wall. The two symmetrically set hand levers provide the operator with a stable and balanced grip point, ensuring that the equipment can be effectively controlled and operated during drilling and mode switching, thus improving the convenience and safety of operation.
[0021] The beneficial effects of this invention are: By linking the inclined slide, connecting rod, conical block, and locking assembly in the retaining wall assembly, the controllable radial expansion of the retaining wall panels is achieved. After the locking rod switches to the expanded position, the telescopic spring drives the inner core shaft to move downward. The conical block, through the connecting rod, converts the axial movement into the synchronous and uniform radial expansion movement of multiple retaining wall panels, which actively compacts the borehole sidewall to form a tightly integrated cylindrical retaining wall. This effectively reinforces the borehole wall, significantly reduces the risk of collapse in soft strata during sampling, and isolates the lateral soil from disturbing the sample, ensuring the integrity and in-situ nature of the sampled soil column sidewall, thus providing a high-quality sample basis for subsequent accurate mapping and analysis.
[0022] With the thrust plate structure fixed at the bottom of the inner mandrel, after the protective wall is fully expanded and the sample enters the drill rod, the operator can drive the entire inner mandrel to continue moving downward by pressing down on the hand lever. The thrust plate evenly transmits the axial downward pressure to the top of the loose soil column obtained in the drill rod, axially compacting it, so that the loose soil particles are initially consolidated and tightly bound, and the original vertical stratification of the soil is maintained. During the process of the compacted sample column being pushed out of the drill rod and transferred, the shape is stable and it is not easy to disperse or the strata are confused, thus completely preserving the stratigraphic sequence information, which greatly improves the accuracy of laboratory analysis and the reliability of mapping data.
[0023] Through the integrated locking components and symmetrical hand lever design, the sampling process is simplified and the operational stability is improved. Rotating the locking lever allows for quick switching between vertical slots and locking slots of different heights. One-button control enables the expansion, contraction, and locking of the protective wall, making operation intuitive and simple. The symmetrical hand lever provides the operator with a balanced grip point for applying force. Combined with the energy storage and release of the pre-compression spring, the steps of protective wall expansion, sample compaction, and final sample discharge are labor-saving and efficient. The entire device integrates protective wall, sampling, and compaction functions, with a compact structure and reliable operation, significantly improving the efficiency and success rate of continuous sampling operations under complex geological conditions. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the brushless motor structure of the present invention; Figure 3 This is a schematic diagram of the locking component of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of point A in the middle; Figure 5 For the present invention Figure 3 A magnified structural diagram of point B in the middle section; Figure 6 This is a schematic diagram of the thrust plate structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point C; Figure 8 This is a schematic diagram of the structure of the wall-protecting component of the present invention; Figure 9 This is a schematic diagram of the structure at the conical block of the present invention; Figure 10 This is a schematic diagram of the telescopic spring in its telescopic state according to the present invention; Figure 11 This is a schematic diagram of the protective panel of the present invention in its unfolded state.
[0025] In the picture: 1. Brushless motor; 11. Handheld lever; 2. Drill rod; 21. Lower ramp; 22. Upper slot; 23. Fitting groove; 3. Adjustment mechanism; 31. Locking assembly; 311. Telescopic spring; 312. Locking rod; 313. Connecting column; 314. Rotating column; 315. Vertical groove; 316. Locking groove; 32. Wall protection assembly; 321. Wall protection plate; 322. Angled opening; 323. Angled slide; 324. Angled slide groove; 325. First connecting seat; 326. Guide groove; 33. Inner mandrel; 34. Conical block; 35. Second connecting seat; 36. Connecting rod; 37. Thrust plate; 4. Drill bit. Detailed Implementation
[0026] 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.
[0027] Reference Figure 1 - Figure 11 A geological sample acquisition device for land information mapping services is provided, including a brushless motor 1, a drill rod 2 installed below the brushless motor 1, and a drill bit 4 installed below the drill rod 2. It also includes an adjustment mechanism 3 disposed inside the drill rod 2. The adjustment mechanism 3 includes a locking component 31, a wall protection component 32, and an inner mandrel 33. The locking component 31 is located at the upper part of the drill rod 2, the inner mandrel 33 is located below the locking component 31, and the wall protection component 32 is located in the middle section of the drill rod 2.
[0028] Reference Figure 3 - Figure 7 The wall protection assembly 32 includes multiple wall protection plates 321. Multiple fitting grooves 23 are provided on the outer wall of the drill rod 2. When the multiple wall protection plates 321 are folded up, they are respectively housed in the corresponding fitting grooves 23, and guide ribs are formed between two adjacent wall protection plates 321. When the multiple wall protection plates 321 are unfolded, they together form a straight cylindrical wall protection.
[0029] Specifically, the wall-protecting plate 321 is a rigid plate with a certain thickness and curvature. Its inner arc surface is precisely matched with the shape of the fitting groove 23 on the outer wall of the drill rod 2, while the outer arc surface is smoothly processed. The function of a single wall-protecting plate 321 is to form a local sector of the borehole wall protection. When the equipment is drilling down or lifting the drill, multiple wall-protecting plates 321 are radially retracted and completely housed in the corresponding fitting groove 23 on the outer wall of the drill rod 2. At this time, the outer surface of the wall-protecting plate 321 is flush with the outer circle of the main body of the drill rod 2, forming a complete and streamlined drill column outline, which minimizes the frictional resistance and the risk of stuck drill when the drill rod 2 is lowered and lifted into the hole. When the drill bit 4 drills to the target sampling layer, the adjustment mechanism 3 is triggered, driving the wall-protecting plate 321 to expand radially outward from the fitting groove 23.
[0030] By setting the adjustment mechanism 3, the wall protection plate 321 is automatically deployed and locked during sampling, effectively isolating the loose soil layer from the sample. After sampling, it can automatically reset and arrange the sample, improving the efficiency of continuous sampling. The mechanism is simple to operate and reliable, ensuring that the wall protection can be stably formed and high-quality original samples can be obtained under different soil conditions, greatly reducing the risk of borehole wall collapse.
[0031] Reference Figure 3 - Figure 9 The inner arc surface of the retaining plate 321 is fixedly connected to an inclined slide 323. Multiple inclined grooves 324 are formed on the inner wall of the drill rod 2. The outer wall of the inclined slide 323 is slidably connected to the inner wall of the corresponding inclined groove 324. A first connecting seat 325 is fixedly connected to the side of the inclined slide 323 away from the retaining plate 321. The first connecting seat 325 is located inside the drill rod 2. A guide groove 326 is formed at the top of the inclined slide 323. A conical block 34 is fixedly connected to the outer wall of the middle section of the inner core 33. Multiple inclined grooves 324 are fixedly connected to the bottom of the conical block 34. A second connecting seat 35 is rotatably connected to a corresponding first connecting seat 325 with a connecting rod 36. A guide groove 326 is used to guide and constrain the rotation trajectory of the connecting rod 36. The outer wall of the drill rod 2 is also provided with multiple lower slopes 21 and multiple upper slots 22. Both ends of the protective plate 321 are provided with inclined openings 322. When the protective plate 321 is closed, the inclined openings 322 on it are inserted into the corresponding upper slots 22. When the protective plate 321 is unfolded, the inclined slide 323 on its inner side moves obliquely downward along the lower slope 21.
[0032] Specifically, each wall panel 321 has an inclined slide 323 fixedly connected to its inner arc surface. Its function is to convert the radial movement of the wall panel 321 into oblique sliding along a specified path on the inner wall of the drill pipe 2. The inclined slide groove 324 provides a unique and controlled motion trajectory for the inclined slide 323, ensuring that all wall panels 321 are synchronous and stable during the unfolding and retraction process, without twisting or jamming. The guide groove 326 is used to accommodate, guide and constrain the swing end of the connecting rod 36, preventing unnecessary lateral displacement of the connecting rod 36 during the movement, and ensuring that the force transmission always proceeds along the designed linkage plane.
[0033] Through the precise guidance of the inclined slide 323 and the inclined chute 324, and the power conversion of the conical block 34 and the connecting rod 36, the reliable deployment and repositioning of the retaining plate 321 are achieved. This allows the equipment to maintain a streamlined shape during drilling to reduce resistance, and to deploy with one click during sampling to form a stable retaining wall to isolate soil interference. After sampling, it can be quickly repositioned and sorted, thus efficiently and reliably obtaining high-quality undisturbed soil samples and supporting continuous operation.
[0034] Reference Figure 3 - Figure 10 The locking assembly 31 includes a telescopic spring 311 fixedly connected to the inner wall of the top of the drill rod 2. A connecting post 313 is fixedly connected to the bottom of the telescopic spring 311. The bottom of the connecting post 313 is fixedly connected to the top of the inner core 33. A rotating post 314 is rotatably connected to the inner wall of the connecting post 313. A locking rod 312 is fixedly connected to the inner wall of the rotating post 314. The inner wall of the drill rod 2 has two centrally symmetrical vertical grooves 315 and two locking grooves 316. The vertical grooves 315 communicate with the corresponding locking grooves 316. The two ends of the locking rod 312 are respectively located in the two vertical grooves 315 or the two locking grooves 316.
[0035] Specifically, the bottom of the spring is fixedly connected to the top of the inner spindle 33 via a connecting post 313. The connecting post 313 directly transmits the axial force of the telescopic spring 311 to the inner spindle 33. The rotating post 314 is rotatably connected to the inner wall of the connecting post 313, and its function is to serve as the mounting base and rotating shaft for the operating handle. The vertical groove 315 allows the locking rod 312 to slide only vertically. When the locking rod 312 is in this groove, the inner spindle 33 and the connecting post 313 can move freely axially under the action of the spring force or under external operation. The locking groove 316 is connected to the vertical groove 315. The upper end corresponds to the retracted locking position, the lower end corresponds to the unfolded locking position, and the middle corresponds to the adjustment position. When the operator rotates the rotating post 314, causing the locking rod 312 to slide from the vertical groove 315 into the locking groove 316, the end of the locking rod 312 is stuck by the side wall of the locking groove 316, thereby preventing the axial movement of the connecting post 313 and the inner spindle 33.
[0036] By setting the locking component 31, reliable control of the wall protection component 32 is achieved. Its telescopic spring 311 and connecting column 313 transmit the elastic force to the inner spindle 33. By rotating the locking rod 312 to switch between the vertical groove 315 and the locking groove 316, reliable locking of the wall protection component 32 in the unfolded or retracted state can be achieved.
[0037] Reference Figure 6 The bottom of the inner mandrel 33 is fixedly connected to a thrust plate 37. The outer wall of the thrust plate 37 is slidably connected to the inner wall of the drill rod 2. The thrust plate 37 is located below the inclined slide groove 324.
[0038] Reference Figure 2 Two symmetrically arranged hand levers 11 are fixedly connected to the outer wall of the brushless motor 1.
[0039] By setting the thrust plate 37, the axial movement of the inner mandrel 33 is made more stable, and the pressure can be evenly transmitted to the soil below to compact the loose soil when pressing down, providing basic support for the stable development of the wall. The two symmetrically set hand levers 11 provide the operator with a stable and balanced grip point, ensuring that the equipment can be effectively controlled and operated during drilling and mode switching, improving the convenience and safety of operation.
[0040] Working principle of the invention: Before sampling, the operator pushes the locking rod 312 of the locking assembly 31 into the upper end of the locking groove 316, axially locking the inner spindle 33, causing the telescopic spring 311 to be pre-compressed and stored, and the conical block 34 to remain in the highest position. This locking forces the wall protection assembly 32 to fully retract, and the connecting rod 36 pulls the first connecting seat 325 and the inclined slide 323 inward, causing the wall protection plate 321 to be fully embedded in the fitting groove 23 of the drill rod 2. The inclined opening 322 at the upper end of the wall protection plate 321 is engaged in the upper slot 22. At this time, the outer diameter of the equipment is at its smallest, and a guide rib is formed between two adjacent wall protection plates 321, which is conducive to the initial drilling.
[0041] During sampling, the operator holds the equipment with two hand levers 11, starts the brushless motor 1, and the power is transmitted to the drill bit 4 through the drill rod 2. The equipment begins to drill downward. When the drill bit 4 reaches the predetermined sampling depth, the operator stops the brushless motor 1, terminates the drilling, and initiates the mode switch.
[0042] Subsequently, the operator operates the locking rod 312, causing it to slide from the locking groove 316 into the vertical groove 315, releasing the constraint on the inner mandrel 33. The pre-compressed telescopic spring 311 releases its elastic force, pushing the conical block 34 and the inner mandrel 33 downward. If there is solid soil below the thrust plate 37 at the lower end of the conical block 34, the thrust plate 37 is held in place, and the inner mandrel 33 remains stationary. At this time, the drill rod 2 is lifted, and the elastic force of the telescopic spring 311 is released upward. The drill rod 2 moves upward relative to the inner mandrel 33, and the inclined sliding groove 324 on its inner wall moves accordingly. The inclined slide frame 323 nested in the inclined sliding groove 324, because it is connected to the inner mandrel 33 through the connecting rod 36, is forced to produce a downward displacement along the inclined sliding groove 324, unfolding to form a straight cylindrical protective wall.
[0043] If the soil below is loose, the cone block 34 will move down a short distance under the elastic force of the telescopic spring 311 until the loose soil is compacted. At the same time, the inclined slide 323 moves with the cone block 34 and unfolds to form a straight cylindrical protective wall.
[0044] Next, rotate the locking rod 312 and push it back into the locking groove 316, locking it into its lowest locking position, thus axially locking the inner spindle 33 in the current position, thereby fixing the entire protective wall unfolding mechanism and preventing it from retracting in subsequent operations.
[0045] After the wall protection is locked, the operator uses the hand rod 11 to move the drill rod 2 together with the locked straight wall protection in short, small up and down movements to compact the outer ring of soil around the deployed wall protection, further enhancing the circumferential stability of the wall protection and creating an ideal environment for sample extraction that is isolated by the wall protection plate 321 and free from lateral disturbance.
[0046] After the borehole wall is compacted, the operator moves the locking rod 312 from the lower end of the locking groove 316 back to the upper locking position, locking the inner mandrel 33. During this process, the telescopic spring 311 is forced to compress again. Simultaneously, through the reverse linkage of the connecting rod 36, the inclined slide 323, and the inclined slide groove 324, the unfolded protective plate 321 is pulled back, causing it to retract and fit into the fitting groove 23 of the drill rod 2, restoring the device to its initial streamlined shape. Then, the drill rod 2, now with its streamlined shape restored, is pulled out of the borehole, the locking rod 312 is released, and the sample column is discharged from the drill rod 2 under the compression of the telescopic spring 311.
[0047] Finally, repeat the above steps to perform depth sampling or repositioning sampling.
[0048] 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, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A geological sample acquisition device for land information mapping services, comprising a brushless motor (1), a drill rod (2) installed below the brushless motor (1), and a drill bit (4) installed below the drill rod (2), characterized in that: It also includes an adjustment mechanism (3) disposed inside the drill pipe (2), the adjustment mechanism (3) including a locking assembly (31), a wall protection assembly (32) and an inner mandrel (33), the locking assembly (31) being located at the upper part of the drill pipe (2), the inner mandrel (33) being located below the locking assembly (31), and the wall protection assembly (32) being located in the middle section of the drill pipe (2); The wall protection assembly (32) includes multiple wall protection plates (321). The outer wall of the drill rod (2) is provided with multiple fitting grooves (23). When the multiple wall protection plates (321) are closed, they are placed in the corresponding fitting grooves (23) respectively. A guide rib is formed between two adjacent wall protection plates (321). When the multiple wall protection plates (321) are unfolded, they together form a straight cylindrical wall protection.
2. The geological sample acquisition device for land information mapping services according to claim 1, characterized in that: The inner arc surface of the wall panel (321) is fixedly connected to the inclined slide (323), and the inner wall of the drill rod (2) is provided with multiple inclined slide grooves (324). The outer wall of the inclined slide (323) is slidably connected to the inner wall of the corresponding inclined slide groove (324).
3. The geological sample acquisition device for land information mapping services according to claim 2, characterized in that: The inclined slide (323) is fixedly connected to a first connecting seat (325) on the side away from the wall plate (321). The first connecting seat (325) is located inside the drill rod (2). A guide groove (326) is provided on the top of the inclined slide (323).
4. The geological sample acquisition device for land information mapping services according to claim 3, characterized in that: A conical block (34) is fixedly connected to the outer wall of the middle section of the inner mandrel (33). A plurality of second connecting seats (35) are fixedly connected to the bottom of the conical block (34). A connecting rod (36) is rotatably connected between the second connecting seat (35) and the corresponding first connecting seat (325). The guide groove (326) is used to guide and constrain the rotation trajectory of the connecting rod (36).
5. The geological sample acquisition device for land information mapping services according to claim 4, characterized in that: The outer wall of the drill rod (2) is also provided with multiple lower slopes (21) and multiple upper slots (22). Both ends of the protective plate (321) are provided with slanted openings (322). When the protective plate (321) is closed, the slanted openings (322) on it are inserted into the corresponding upper slots (22). When the protective plate (321) is unfolded, the inclined slide (323) on its inner side moves obliquely downward along the lower slope (21).
6. The geological sample acquisition device for land information mapping services according to claim 1, characterized in that: The locking assembly (31) includes a telescopic spring (311) fixedly connected to the inner wall of the top of the drill rod (2), and a connecting post (313) fixedly connected to the bottom of the telescopic spring (311), the bottom of the connecting post (313) being fixedly connected to the top of the inner mandrel (33).
7. The geological sample acquisition device for land information mapping services according to claim 6, characterized in that: The inner wall of the connecting column (313) is rotatably connected to a rotating column (314), and the inner wall of the rotating column (314) is fixedly connected to a locking rod (312). The inner wall of the drill rod (2) is provided with two centrally symmetrical vertical grooves (315) and two locking grooves (316). The vertical grooves (315) are connected to the corresponding locking grooves (316). The two ends of the locking rod (312) are respectively located in the two vertical grooves (315) or the two locking grooves (316).
8. The geological sample acquisition device for land information mapping services according to claim 3, characterized in that: The bottom of the inner mandrel (33) is fixedly connected to a thrust plate (37), the outer wall of the thrust plate (37) is slidably connected to the inner wall of the drill rod (2), and the thrust plate (37) is located below the inclined slide groove (324).
9. The geological sample acquisition device for land information mapping services according to claim 1, characterized in that: Two symmetrically arranged hand levers (11) are fixedly connected to the outer wall of the brushless motor (1).