Geological exploration sampling device

Abstract

The utility model discloses a geological exploration sampling device which comprises a guide pipe, a guide mechanism, a connector, a sampling pipe and an optional soil loosening mechanism, a vertical opening is formed in the front of the guide pipe and used for reserving a space for operation while ensuring stable guide, a dual-purpose drilling machine capable of switching working modes is installed in the guide mechanism, and the connector is connected with the soil loosening mechanism. The dual-purpose drilling machine is connected with the sampling pipe through the connector, the sampling pipe is driven to complete sampling operation in a rotating, impacting or rotating and impacting combined mode, the connector and the sampling pipe are rapidly assembled and reliably fixed through the clamping groove, the positioning block and the covering part, and the connector and the covering part are provided with a vent hole and an air hole which are communicated with each other. The sampling pipe is used for discharging gas in the sampling pipe in the sampling process, so that a soil sample smoothly enters the sampling pipe, and the sampling pipe is stable in structure, convenient to assemble, capable of meeting the sampling requirements under different soil texture conditions and suitable for the fields of agricultural soil detection, environment monitoring, engineering investigation and the like.

Description

Technical Field

[0001] This utility model relates to the field of sampling and testing equipment technology, specifically a geological exploration sampling device. Background Technology

[0002] With the continuous development of agricultural production management, soil environmental monitoring, engineering geological exploration, and contaminated site investigation, soil sampling, as a fundamental step in subsequent testing and analysis, directly impacts the test results due to the stability of the sampling method, the consistency of the sampling depth, and the integrity of the sample. Existing soil sampling devices mostly employ manual tube insertion, electric drills combined with sampling tubes, or simple impact sampling methods. However, in practical use, these methods generally suffer from insufficient structural adaptability and unstable sampling processes.

[0003] On the one hand, existing sampling devices have limited ability to constrain the sampling direction during the sampling process. The sampling tube is prone to deflection or swing when inserted into the soil, making it difficult to accurately control the sampling depth. Especially in multi-point or stratified sampling operations, the comparability between different samples is poor. At the same time, in strata with hard soil or mixed gravel, relying solely on impact sampling can easily cause excessive sampling resistance, and may even result in the sampling tube being unable to continue to be inserted or the sample being damaged.

[0004] On the other hand, existing technologies often require different types of sampling tools to be used for different soil conditions, and lack a structural design that can flexibly switch between rotary loosening and impact sampling, resulting in low on-site operation efficiency. At the same time, the connection methods between the various components of the sampling device are mostly simple screw connections or plug connections, which are prone to loosening under rotation or impact conditions, affecting the stability of power transmission, and even posing a risk of falling off.

[0005] In addition, existing soil sampling devices generally neglect the issue of gas venting inside the sampling tube during the sampling process. When a relatively closed space is formed at the top of the sampling tube, air resistance or negative pressure is easily generated during the process of soil entering the sampling tube, which leads to unsmooth soil entry, incomplete sampling, sample compression or rebound, and other problems, affecting the sampling quality.

[0006] Therefore, how to provide a soil sampling device that is structurally stable, reliably assembled, and can flexibly switch between two working conditions of rotary loosening and impact sampling, while ensuring stable sampling direction, reliable power transmission, and smooth entry of soil samples into the sampling tube during the sampling process, has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] The purpose of this invention is to provide a geological exploration sampling device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a geological exploration sampling device, comprising a guiding mechanism, wherein a guide mechanism is slidably mounted inside the guiding mechanism, a connector is clamped at the bottom end of the guide mechanism, and a straight tube for sampling is mounted outside the connector;

[0009] The guiding mechanism includes a guide tube capable of adjusting the vertical angle;

[0010] The guiding mechanism includes a guide frame with guide wheels, the guide frame is slidably engaged with the inside of the guide tube, and a dual-purpose drill is mounted at the center of the guide frame, the output end central axis of the dual-purpose drill coincides with the central axis of the guide tube;

[0011] The dual-purpose drilling rig has three working states: rotation, hammering, and rotation and hammering simultaneously.

[0012] In the hammering working state, the top end of the straight pipe is engaged with the bottom end of the connector, and the top end of the straight pipe is fixed to the connector by a nut and a straight pipe positioning piece. The connector, which is directly fixed to the straight pipe, is clamped and fixed to the output end of the dual-purpose drill in the hammering state.

[0013] In the state of rotating operation or rotating while hammering, the top end of the straight pipe is engaged with the bottom end of the connector, the top end of the connector is sleeved on the inside of the soil loosening mechanism, the top end of the connector penetrates the soil loosening mechanism, and the connector fixed to the soil loosening mechanism and the straight pipe is clamped and fixed to the output end of the dual-purpose drill in the rotating state.

[0014] Preferably, a platform is vertically welded to the top of the guide tube, and a spiral tube is welded to the outside of the platform. An adjusting rod is screwed into the inside of the spiral tube, and a fixed cone is rotatably fitted to the bottom of the adjusting rod. A test platform level, i.e., a level bead for the verticality of the guide tube, is set above the platform.

[0015] Preferably, a fixing ring is welded to the inner side of the guide frame, and the fixing ring is clamped to the outside of the outer shell of the output end of the dual-purpose drill.

[0016] Preferably, the guide frame includes at least four guide structures, two of which are in the same plane, and the remaining guide structures are evenly distributed on one side of the guide structures in the same plane.

[0017] Preferably, at least two guide wheels are fixed to the outer side of the guide frame.

[0018] Preferably, the connector includes a connecting piece, the outer side of which is uniformly provided with through grooves, and the gaps between the through grooves are uniformly provided with retaining grooves.

[0019] Preferably, the straight tube includes a sampling tube, the top end of which is welded with a positioning block, one end of which is welded to the inner side of the sampling tube, and the other end of which extends to the outer side of the sampling tube.

[0020] Preferably, the soil loosening mechanism includes a connecting strip, a butt plate welded to the top of the connecting strip, a spiral plate welded to the outer side of the connecting strip, and a blade uniformly welded to the bottom of the connecting strip.

[0021] Preferably, the lower surface of the docking piece is provided with a positioning hole, and the structure of the straight tube positioning piece is the same as that of the docking piece.

[0022] Preferably, the surfaces of the connecting piece and the mating piece are respectively provided with vent holes and air holes.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a vertical opening in front of the guide tube and adopting a guide structure distributed within a 180° range on the guide frame, the guide frame obtains stable vertical guiding support on the rear side, while reserving sufficient space for handheld operation of the dual-purpose drill. Combined with a dual-purpose drill that can switch between rotation, impact, or rotation plus impact working modes, flexible sampling under different soil conditions is achieved. Through a unified assembly structure of connectors, positioning blocks, slots, docking plates, or straight pipe positioning plates, the sampling tube can be quickly assembled and maintain a reliable connection under conditions of rotational loosening, impact sampling, and combined sampling, ensuring stable power transmission. Simultaneously, by setting interconnected vent holes and air perforations on the connectors and docking plates, air inside the sampling tube can be discharged in a timely manner during sampling, avoiding air resistance affecting soil sample entry, thereby ensuring the integrity and consistency of the sampling. The above structure improves the stability, adaptability and sampling quality of the sampling process while ensuring ease of operation, and solves the problems of easy deviation, limited applicable working conditions, insufficient connection reliability and sampling difficulties caused by air resistance in the soil sampling process of the prior art. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the state before use of this utility model.

[0026] Figure 3 This is the front view of the present invention.

[0027] Figure 4 This is a schematic diagram of the sampler structure of this utility model.

[0028] Figure 5 This is a schematic diagram of the sampler assembly of this utility model.

[0029] Figure 6 This is a schematic diagram of the sampling drill bit assembly of this utility model.

[0030] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point a.

[0031] Figure 8 This is an exploded view of the sampling drill bit of this utility model.

[0032] Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point b.

[0033] Figure 10 This is a schematic diagram of the straight tube sampling mechanism of this utility model.

[0034] Figure 11 This is a schematic diagram of the assembly of the straight tube sampling mechanism of this utility model.

[0035] Figure 12 for Figure 11 Enlarged schematic diagram of the structure at point c.

[0036] In the diagram: 1. Guiding mechanism, 11. Guiding tube, 12. Adjusting rod, 13. Fixed cone, 14. Screw tube, 15. Horizontal ball, 2. Guiding mechanism, 21. Fixed ring, 22. Guide frame, 23. Guide wheel, 24. Dual-purpose drill, 3. Connector, 31. Connecting piece, 32. Through groove, 33. Slot, 34. Vent hole, 35. Connecting rod, 4. Soil loosening mechanism, 41. Connecting strip, 42. Butt joint piece, 43. Vent hole, 44. Positioning hole, 45. Spiral blade, 46. Cutting head, 5. Straight tube, 51. Sampling tube, 52. Positioning block, 6. Straight tube positioning piece. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figure 1-12 This utility model provides a technical solution: a geological exploration sampling device, including a guiding mechanism 1, a guiding mechanism 2 is slidably assembled inside the guiding mechanism 1, a connecting head 3 is clamped at the bottom end of the guiding mechanism 2, and a straight tube 5 for sampling is assembled outside the connecting head 3;

[0039] The guiding mechanism 1 includes a guiding tube 11 that can adjust the vertical angle;

[0040] The guiding mechanism 2 includes a guide frame 22 with guide wheels. The guide frame 22 is slidably engaged with the inside of the guide tube 11. A dual-purpose drill 24 is mounted at the center of the guide frame 22. The central axis of the output end of the dual-purpose drill 24 coincides with the central axis of the guide tube 11.

[0041] The dual-purpose drill rig 24 has three working modes: rotation, hammering, and simultaneous rotation and hammering.

[0042] In the hammering working state, the top end of the straight pipe 5 is engaged with the bottom end of the connector 3, and the top end of the straight pipe 5 is fixed to the connector 3 and the straight pipe 5 by the nut and the straight pipe positioning piece 6. The connector 3, which is directly fixed to the straight pipe 5, is clamped and fixed to the output end of the dual-purpose drill 24 in the hammering state.

[0043] In the state of rotating operation or rotating while hammering, the top end of the straight pipe 5 is engaged with the bottom end of the connector 3, the top end of the connector 3 is sleeved on the inside of the loosening mechanism 4, the top end of the connector 3 penetrates the loosening mechanism 4, and the connector 3, which is fixed to the loosening mechanism 4 and the straight pipe 5, is clamped and fixed to the output end of the dual-purpose drill 24 in the rotating state.

[0044] This utility model provides a geological exploration sampling device with a structure consisting of a guiding mechanism 1 and a guiding mechanism 2. The guiding mechanism 1 constrains the sampling direction, ensuring that the sampling process is always carried out vertically, thereby guaranteeing the stability of the soil sample sampling depth and posture. The guiding mechanism 2 is slidably assembled inside the guiding mechanism 1, and its bottom end is connected to the straight pipe 5 used for sampling via a connector 3. The guiding mechanism 2 guides and restricts the axial position of the straight pipe 5, preventing it from tilting or swaying during sampling. A dual-purpose drill 24 is mounted at the center of the guiding mechanism 2, and the central axis of the output end of the dual-purpose drill 24 coincides with the central axis of the guiding pipe 11, structurally ensuring that the sampling power is output along the axial direction of the straight pipe 5. The dual-purpose drill rig 24 has two working modes: rotation and hammering. In the rotation mode, the connector 3 is simultaneously fixed to both the loosening mechanism 4 and the straight pipe 5, allowing the loosening mechanism 4 to cut and loosen the soil first, reducing soil resistance and minimizing sampling disturbance. In the hammering mode, the connector 3 is directly fixed to the straight pipe 5, and the dual-purpose drill rig 24 provides axial impact force to push the straight pipe 5 into the soil, thus achieving soil sample extraction. Through this structural combination, the device can flexibly switch between working modes under different soil conditions, ensuring sampling efficiency while improving the accuracy of sampling depth control and sample integrity.

[0045] The guide tube 11 in the guiding mechanism 1 is a hollow tubular structure, which serves as the vertical reference component for soil sampling in this invention. During use, the guide tube 11 provides a stable axial guiding space for the guiding mechanism 2 through its own straight structure, allowing the guiding mechanism 2 to move up and down only along the axial direction of the guide tube 11 inside the guide tube 11. This effectively limits the radial offset or tilting movement of the guiding mechanism 2 during sampling. Through the enveloping guidance of the guiding mechanism 2 by the guide tube 11, the power output by the dual-purpose drill 24 in rotation or hammering operation is always transmitted to the connector 3 and straight pipe 5 along the central axis of the guide tube 11, avoiding problems such as tilting of the sampling hole, inconsistent sampling depth, or uneven force on the sampling tube caused by sampling direction deviation.

[0046] Furthermore, the guide tube 11 enables the sampling device to maintain a relatively stable sampling posture under different soil conditions. Especially in harder soil layers or environments with gravel, the guide tube 11 provides effective support for the guiding mechanism 2, reducing the swaying amplitude of the straight tube 5 during stress, thereby minimizing disturbance to the soil structure during sampling and improving the integrity and representativeness of the sample. In addition, the guide tube 11 serves as a reference component for the sampling path, allowing for intuitive control of the sampling depth through the displacement of the guiding mechanism 2 within the guide tube 11. This facilitates consistent sampling depth settings at the same or different sampling points, which is beneficial for comparative analysis of subsequent soil testing results. Through the above structural coordination, the guide tube 11 in this invention not only serves a guiding function but also ensures stability control and standardized sampling during the sampling process, making this device more suitable for soil testing scenarios requiring multi-point, stratified, or repeated sampling.

[0047] Specifically, a platform is vertically welded to the top of the guide tube 11, and a screw tube 14 is welded to the outside of the platform. An adjusting rod 12 is screwed into the inside of the screw tube 14. A fixed cone 13 is rotatably assembled at the bottom of the adjusting rod 12. A horizontal bead 15 for testing the level of the platform, i.e., the verticality of the guide tube 11, is set above the platform.

[0048] The guide tube 11 in the guiding mechanism 1 serves as the vertical reference component of the entire soil sampling device. A platform is vertically welded to its top, and the platform and guide tube 11 are rigidly connected, providing upper support and a mounting base for attitude adjustment. A threaded tube 14 is welded to the outside of the platform, with its axis substantially perpendicular to the platform. An adjusting rod 12 is threaded into the inside of the threaded tube 14, allowing it to be screwed in or out along the axial direction of the threaded tube 14, thus adjusting the extension length of the adjusting rod 12 relative to the platform. A fixed cone 13 is rotatably connected to the bottom of the adjusting rod 12, allowing the fixed cone 13 to rotate relative to the adjusting rod 12 when it rotates or is subjected to force, preventing additional torque during insertion into the ground or contact with the surface.

[0049] Before actual sampling, the fixed cone 13 is inserted into the ground or makes reliable contact with the ground surface by rotating the adjusting rod 12. This ensures that the guide pipe 11 forms a stable support point during sampling, preventing displacement or tilting of the guide pipe 11 due to impact or rotational reaction force during subsequent operation of the dual-purpose drilling rig 24. To facilitate quick judgment and correction of the vertical status of the guide pipe 11 by the operator, a level bead 15 is installed above the platform to detect the platform's levelness. The operator can fine-tune the adjusting rod 12 according to the position change of the level bead 15 to keep the platform basically level, thereby ensuring that the guide pipe 11 is in a vertical position.

[0050] The dual-purpose drill 24 used in this invention is a dual-purpose impact drill with a working mode switching function. Structurally, it is installed inside the guide frame 22, and the output end shell of the dual-purpose drill 24 is circumferentially clamped and fixed by the fixing ring 21 set on the inner side of the guide frame 22. In the rotary drive mode, the output end of the dual-purpose drill 24 generates radial rotational motion, providing continuous rotary cutting power to the connector 3 and the soil loosening mechanism 4 below it for breaking and loosening the soil. In the impact drive mode, the output end of the dual-purpose drill 24 generates high-frequency impact motion in the axial direction, providing axial propulsion force to the straight pipe 5, so that the sampling pipe can be gradually inserted into the soil under the impact to complete the sampling. Since the dual-purpose drill rig 24 generates large rotational torque or axial reaction force in both of the above working modes, the vertical adjustment and fixing structure of the guide tube 11 ensures that the guide tube 11 maintains a stable posture throughout the entire sampling process, providing reliable force support and directional reference for the dual-purpose drill rig 24, thereby ensuring the axial consistency of the sampling process, the controllability of the sampling depth, and the repeatability of the sampling results.

[0051] Specifically, a fixing ring 21 is welded to the inner side of the guide frame 22, and the fixing ring 21 is clamped to the outside of the outer shell of the output end of the dual-purpose drill rig 24.

[0052] The guide frame 22 in the guide mechanism 2 serves as the load-bearing and guiding structure between the dual-purpose drill 24 and the guide pipe 11. A fixing ring 21 is fixedly installed on its inner side by welding. The fixing ring 21 is an integrally formed ring structure, and its inner diameter matches the outer diameter of the output end shell of the dual-purpose drill 24, allowing the fixing ring 21 to form a circumferential clamp and position on the output end shell of the dual-purpose drill 24. During installation, the output end shell of the dual-purpose drill 24 is inserted into the fixing ring 21 from the inner side of the guide frame 22. The rigid connection between the fixing ring 21 and the guide frame 22 ensures that the dual-purpose drill 24 is stably fixed at the center position of the guide frame 22, thereby preventing radial displacement, shaking, or dislocation of the dual-purpose drill 24 during operation.

[0053] The dual-purpose drill 24 used in this invention is a dual-purpose impact drill with a working mode switching function. In terms of structure and function, it can switch between rotary drive mode and impact drive mode: In rotary drive mode, the output end of the dual-purpose drill 24 generates radial rotational motion around its own axis, which is used to provide continuous and stable rotational power to the connector 3 and the soil loosening mechanism 4 below it, so that the soil loosening mechanism 4 can cut, break and loosen the soil; In impact drive mode, the output end of the dual-purpose drill 24 generates high-frequency impact motion in the axial direction, which is transmitted to the straight pipe 5 through the connector 3, so that the sampling pipe is gradually inserted into the soil under the impact to complete the sampling.

[0054] Because the dual-purpose drill 24 generates a large rotational torque in its rotating operation and a periodic axial impact reaction force in its impact operation, the circumferential clamping of the output end housing of the dual-purpose drill 24 by the fixing ring 21 ensures that the dual-purpose drill 24 maintains a stable relative position with the guide frame 22 in both operating modes. This allows the aforementioned rotational torque and axial impact force to be reliably transmitted to the guide frame 22, and further guided and dispersed by the sliding fit structure between the guide frame 22 and the guide tube 11. Simultaneously, the fixing ring 21 ensures that the central axis of the output end of the dual-purpose drill 24 remains aligned with the central axis of the guide frame 22 and coincides with the central axis of the guide tube 11 after installation. Structurally, this guarantees that the connector 3 and the straight pipe 5 always move along the same axial direction during sampling, providing stable and coaxial power input conditions for subsequent soil sampling, improving the directional consistency of the sampling process, the controllability of the sampling depth, and the integrity of the samples.

[0055] Specifically, the guide frame 22 includes at least four guide structures, two of which are in the same plane, and the remaining guide structures are evenly distributed on one side of the guide structures in the same plane.

[0056] The guide frame 22 consists of at least four guide structures, each arranged along the circumferential direction of the guide frame 22, forming multi-point guiding support during the up-and-down sliding of the guide frame 22 along the guide tube 11. At least two guide structures are arranged in the same plane, preferably the primary force-bearing plane of the guide frame 22 in the force direction. This allows the guide frame 22 to form a stable linear guiding relationship when subjected to axial impact force or rotational reaction force from the dual-purpose drilling rig 24, thereby limiting lateral displacement of the guide frame 22 in that force direction. The remaining guide structures are evenly distributed on one side of the guide structures in the same plane, creating a multi-point support state for the guide frame 22 in the circumferential direction and constraining the swing tendency of the guide frame 22 in non-primary force directions.

[0057] By combining the above-mentioned guide structures, the guide frame 22, when sliding inside the guide tube 11, can form a stable guide reference in the main force direction and obtain a balanced support effect in other directions. This effectively suppresses tilting, twisting, or swaying of the guide frame 22 when the dual-purpose drilling rig 24 is in either rotary drive or impact drive mode. This structural design ensures that the central axis of the guide frame 22 is always aligned with the central axis of the guide tube 11, maintaining good coaxiality of the dual-purpose drilling rig 24 installed via the fixing ring 21 during operation. This, in turn, ensures stable axial movement of the connector 3 and straight pipe 5 during sampling, improving directional consistency and structural stability during the sampling process.

[0058] Specifically, at least two guide wheels 23 are fixed to the outer side of the guide frame 22.

[0059] At least two guide wheels 23 are fixedly mounted on the outer side of the guide frame 22. These guide wheels 23 are spaced apart along the circumferential direction of the guide frame 22 and are fitted into the inner wall of the guide tube 11. The guide wheels 23 are rotatably mounted on the outer side of the guide frame 22 via a pivot, allowing them to rotate freely relative to the guide frame 22 as the guide frame 22 moves axially along the guide tube 11, thus creating a rolling contact relationship between the guide frame 22 and the guide tube 11. By using the guide wheels 23, the contact mode of the guide frame 22 during its movement within the guide tube 11 changes from sliding friction to rolling friction, significantly reducing the frictional resistance during the up-and-down movement of the guide frame 22 and minimizing jamming caused by excessive friction.

[0060] The guide rollers 23 are set to at least two, enabling the guide frame 22 to form a multi-point rolling support state within the guide tube 11. Combined with the arrangement of multiple guide structures, this ensures that the guide frame 22 not only maintains stable movement during axial motion but also effectively disperses the lateral forces generated by the rotary or impact drive of the dual-purpose drill 24. When the dual-purpose drill 24 is in rotary operation, the guide rollers 23, through rolling contact with the inner wall of the guide tube 11, limit the tendency of the guide frame 22 to deviate due to the rotational reaction force. When the dual-purpose drill 24 is in impact operation, the guide rollers 23 can maintain smooth rolling under axial impact force, preventing the guide frame 22 from jumping or momentarily jamming within the guide tube 11. Through this structural arrangement, the guide frame 22 maintains a stable and smooth axial movement throughout the sampling process, providing continuous and stable guidance for the connector 3 and straight pipe 5, thereby further improving the reliability and operational smoothness of the soil sampling process.

[0061] Specifically, the connector 3 includes a connecting piece 31, with through grooves 32 evenly provided on the outer side of the connecting piece 31, and slots 33 evenly provided in the gaps between the through grooves 32.

[0062] The connector 3 serves as an intermediate connecting component between the dual-purpose drilling rig 24 and the straight pipe 5. It includes a connecting piece 31 disposed on the outside of the connector 3. The connecting piece 31 is fixedly connected to the body of the connector 3 by integral molding or welding, providing a circumferential force-bearing structure for the connector 3. Multiple through slots 32 are evenly distributed circumferentially on the outer side of the connecting piece 31. These through slots 32 provide insertion space for corresponding fastening or limiting structures during the assembly of the connector 3 with the straight pipe 5 or the soil loosening mechanism 4, enabling the connector 3 to be quickly assembled and disassembled under different working conditions. A retaining groove 33 is evenly distributed in the gap between adjacent through slots 32. This retaining groove 33 cooperates with the corresponding retaining structure on the top of the straight pipe 5 or the soil loosening mechanism 4, forming an axial limiting relationship after assembly.

[0063] By combining the through groove 32 and the retaining groove 33, the connector 3, when connected to the straight pipe 5 or the loosening mechanism 4, can achieve positional alignment during assembly via the through groove 32, and reliably limit the connection after assembly via the retaining groove 33. This prevents loosening due to rotational torque during the operation of the dual-purpose drill 24, or detachment due to axial impact during impact operation. The connecting piece 31 allows the connector 3 to evenly distribute the rotational torque or axial impact force from the dual-purpose drill 24 to multiple connection positions when under stress, reducing the stress concentration at a single connection point and improving the structural stability and service life of the connector 3 under high-frequency impact and continuous rotation conditions. Through the above structural design, the connector 3 can quickly switch between different sampling modes while ensuring reliable power transmission, providing a reliable connection foundation for stable sampling of the straight pipe 5.

[0064] Specifically, the straight tube 5 includes a sampling tube 51, and a positioning block 52 is welded to the top of the sampling tube 51. One end of the positioning block 52 is welded to the inner side of the sampling tube 51, and the other end extends to the outer side of the sampling tube 51.

[0065] The sampling tube 51 is reliably assembled with the connector 3 through the positioning block 52 welded to its top. In the specific assembly process, the positioning block 52 is first aligned with the through groove 32 on the connector 3, so that the positioning block 52 is inserted into the connector 3 along the opening direction of the through groove 32. After the positioning block 52 passes around the through groove 32, the connecting piece 31 on the outside of the connector 3 passes around the positioning block 52 to form a covering structure. Then, the relative rotation causes the positioning block 52 to enter the corresponding slot 33 position on the inside of the connector 3, so that the slot 33 is engaged with the inside of the welded section of the positioning block 52, thereby forming a preliminary axial limiting relationship in the state of not being fully locked.

[0066] After the basic assembly is completed, depending on the operating conditions, either the loosening mechanism 4 or the straight tube positioning plate 6 can be selected to finally lock and fix the connector 3 and the sampling tube 51. When it is necessary to use the loosening mechanism 4 for rotational loosening operations, the mating plate 42 covers the top of the connector 3, or when the loosening mechanism 4 is not used, the straight tube positioning plate 6 covers the top of the connector 3. The mating plate 42 and the straight tube positioning plate 6 have the same structure and are both provided with positioning holes 44. The positioning holes 44 are inserted into the outer extension of the positioning block 52, thereby forming a secondary limit on the positioning block 52 in the radial direction. Subsequently, the connecting rod 35 passes through the center hole of the mating plate 42 or the straight tube positioning plate 6 and forms a through connection with the connector 3. By screwing a nut to the outer end of the connecting rod 35, the connector 3, the sampling tube 51, and the mating plate 42 or the straight tube positioning plate 6 are pressed and fixed as a whole.

[0067] Through the above assembly structure, the connector 3 is limited in the axial direction by the groove 33 and the welded section of the positioning block 52, and in the radial direction by the positioning hole 44 and the outer structure of the positioning block 52. An integral rigid connection is formed by the axial locking force of the connecting rod 35 and the nut, thus maintaining a stable connection under rotational or impact conditions. The connecting rod 35 has a threaded structure on its exterior and at least three planar structures on its outer surface. These three planar structures cooperate with the three-jaw clamping mechanism of the dual-purpose drill 24, allowing the connecting rod 35 to be reliably clamped by the dual-purpose drill 24 and transmitting rotational torque or axial impact force. The dual-purpose drill 24 adopts a common three-jaw electric drill clamping structure. By clamping the outer surface of the connecting rod 35 with the three jaws, stable driving of the connecting rod 35 is achieved, thereby sequentially transmitting the rotational or impact power of the dual-purpose drill 24 to the connector 3 and the sampling tube 51, completing soil sampling operations under different working conditions.

[0068] Specifically, the soil loosening mechanism 4 includes a connecting strip 41, a butt plate 42 welded to the top of the connecting strip 41, a spiral plate 45 welded to the outside of the connecting strip 41, and a cutter head 46 uniformly welded to the bottom of the connecting strip 41.

[0069] In this embodiment, the soil loosening mechanism 4 is disposed between the connector 3 and the dual-purpose drill 24, and is used to rotate and loosen the soil before sampling. It comprises a connecting strip 41, a mating plate 42 at the top of the connecting strip 41, a spiral blade 45 on the outside of the connecting strip 41, and a cutter head 46 at the bottom of the connecting strip 41. The connecting strip 41 has an axially extending structure, and its axis is aligned with the axes of the guide tube 11 and the straight tube 5. The top of the connecting strip 41 is fixedly connected to the mating plate 42 by welding. The mating plate 42 forms an assembly interface with the connector 3 and the connecting rod 35, enabling the soil loosening mechanism 4 to form an integral structure with the connector 3 and the sampling tube 51 during rotational operation.

[0070] In the rotating working state, the docking plate 42 covers the top of the connector 3 and is inserted into the outer side of the positioning block 52 on the sampling tube 51 through the positioning hole 44 on its lower surface. At the same time, the connecting rod 35 passes through the docking plate 42 and the connector 3 and is locked with a nut, so that the soil loosening mechanism 4, the connector 3 and the sampling tube 51 form a rigid connection, thereby stably transmitting the rotational torque output by the dual-purpose drill 24 to the soil loosening mechanism 4. The spiral blade 45 is spirally arranged along the outer side of the connecting strip 41. During rotation, the spiral blade 45 generates a continuous cutting and pushing action on the soil, causing the soil to move upward or outward along the axial direction, thereby reducing the resistance encountered by the straight tube 5 in the subsequent sampling process. Multiple cutter heads 46 are uniformly welded to the bottom end of the connecting strip 41. The cutter heads 46 are used to initially break up harder soil layers or soil mixed with gravel during rotation, so as to loosen the soil structure.

[0071] Through the aforementioned structural design, the soil loosening mechanism 4, driven by the dual-purpose drill rig 24, can effectively loosen and break up the target soil layer before sampling. This significantly reduces the axial impact force required for the straight pipe 5 to insert into the soil when switching to impact operation or directly sampling, minimizing damage to the original soil structure and improving the smoothness of the sampling process and sample integrity. The soil loosening mechanism 4 allows the device to flexibly select the "loosen soil first, then sample" operation mode according to different soil conditions, expanding the applicability of the soil sampling device.

[0072] Specifically, a positioning hole 44 is provided on the lower surface of the docking piece 42, and the structure of the straight tube positioning piece 6 is the same as that of the docking piece 42.

[0073] To ensure stable and reliable assembly and fixation of the connector 3 and sampling tube 51 under different working conditions, a positioning hole 44 is provided on the lower surface of the mating piece 42. The overall structure of the straight tube positioning piece 6 is identical to that of the mating piece 42, ensuring consistency in both structure and assembly method. Specifically, when the device is in a rotating soil loosening condition, the mating piece 42 covers the connector 3, and the positioning hole 44 on its lower surface engages with the outer extension of the positioning block 52 at the top of the sampling tube 51, thus radially limiting the positioning block 52. When the device is in a direct sampling condition without using the soil loosening mechanism 4, the straight tube positioning piece 6 replaces the mating piece 42 and covers the connector 3. The positioning hole 44 on it also engages with the outer side of the positioning block 52, ensuring consistent positioning and limiting in both working conditions.

[0074] By designing the docking plate 42 and the straight pipe positioning plate 6 as structurally identical components, the connector 3, sampling tube 51, and positioning block 52 can be assembled without altering the basic assembly logic. Switching between different operating modes can be achieved simply by changing the cover, simplifying the assembly process and reducing the risk of misoperation. After assembly, the connecting rod 35 passes through the center hole of the docking plate 42 or the straight pipe positioning plate 6 and is locked with a nut, forming an integral clamping structure with the docking plate 42 or the straight pipe positioning plate 6, the connector 3, and the sampling tube 51. This ensures reliable fixation in the axial direction and provides radial positioning through the engagement of the positioning hole 44 and the positioning block 52. This unified structural design allows the device to maintain a stable connection and consistent force transmission path under both rotary loosening and direct sampling conditions, improving the versatility and reliability of the device structure.

[0075] Specifically, the surfaces of the connecting piece 31 and the mating piece 42 are respectively provided with vent holes 34 and vent holes 43.

[0076] Ventilation holes 34 are provided on the surface of the connecting piece 31 on the connector 3, and ventilation holes 43 are provided on the surface of the mating piece 42 in the loosening mechanism 4. The ventilation holes 34 and 43 correspond to and are connected to each other in the assembled state, forming a continuous exhaust channel between the connector 3 and the loosening mechanism 4. When the sampling tube 51 is gradually inserted into the soil during impact or rotation sampling, the soil sample moves upwards along the inside of the sampling tube 51. If a closed space is formed at the upper end of the sampling tube 51, compressed air or negative pressure can easily be generated inside the sampling tube, thus hindering the soil from continuing to enter the sampling tube, and even causing the soil sample to be pushed back or incomplete sampling. By providing ventilation holes 34 and ventilation holes 43 on the connecting piece 31 and the mating piece 42 respectively, and connecting them to each other in the assembled state, an exhaust channel is formed between the inside of the sampling tube 51 and the outside. During the sampling process, the air generated inside the sampling tube 51 can be discharged in time along the ventilation holes 34 and 43, thus avoiding the impact of gas retention on the soil sample entering the sampling tube.

[0077] Furthermore, when using the loosening mechanism 4 for rotary loosening and sampling, the connection between the vent 43 and the air vent 34 maintains pressure balance at the upper end of the sampling tube 51 during rotation, allowing the cut and loosened soil to smoothly enter the sampling tube 51 under the action of the spiral blade 45 and the cutter head 46. Even when the loosening mechanism 4 is not used and direct sampling is performed using the straight tube positioning plate 6, the air vent 34 still provides an exhaust channel for the sampling tube 51, preventing the formation of a closed negative pressure inside the sampling tube during impact sampling. Through this interconnected exhaust structure, the device ensures that soil samples smoothly enter the sampling tube under different sampling conditions, improving the integrity and stability of the sampling and avoiding sampling failures or sample loss due to air resistance.

[0078] When performing rotary soil loosening and sampling operations, the soil sampling device operates as follows: First, the device is placed at the sampling location, with the bottom of the guide tube 11 aligned with the target sampling point. A vertically penetrating opening is provided at the front of the guide tube 11 to allow space for the operation of the dual-purpose drill rig 24. The adjusting rod 12 drives the fixed cone 13 to be inserted into the ground for initial positioning of the guide tube 11. The verticality of the guide tube 11 is then corrected using the level bead 15 on the platform to ensure that the guide tube 11 remains vertically stable before sampling begins.

[0079] Subsequently, the dual-purpose drill rig 24 is installed inside the guide frame 22, and the output end housing of the dual-purpose drill rig 24 is clamped and fixed by the fixing ring 21, so that the dual-purpose drill rig 24 and the guide frame 22 form an integral structure. The guide structure of the guide frame 22 is distributed within a 180° range along the circumferential direction, that is, the rear side of the guide frame 22 forms a continuous and stable guide support, while the front side corresponding to the vertical opening position of the guide tube 11 is not provided with a guide structure. This ensures stable vertical guidance on the rear side of the guide frame 22 while reserving sufficient space for the operation of the dual-purpose drill rig 24. This structural design ensures that the guide frame 22 receives reliable support in the main force direction when moving up and down inside the guide tube 11, and the operator can hold and operate the dual-purpose drill rig 24 in front of the guide tube 11 through the handle.

[0080] After assembly, the operator holds the handle of the dual-purpose drill 24 and applies axial pressure downward through the vertical opening in front of the guide tube 11, while simultaneously switching the dual-purpose drill 24 to rotary working mode. At this time, the rotary power output by the dual-purpose drill 24 is transmitted to the soil loosening mechanism 4 via the connecting rod 35 and the connecting head 3, causing the spiral blade 45 and the cutter head 46 to rotate, cut, and loosen the soil. During the rotary soil loosening process, the guide frame 22 moves stably downward along the guide tube 11 under the constraint of its rear guide structure, preventing the overall structure from tilting, while the front opening ensures that the operator is not obstructed by the structure when pressing and controlling the dual-purpose drill 24.

[0081] As the rotary loosening process continues, the soil is gradually loosened, and the loosening mechanism 4 descends into the soil layer under the combined action of axial pressing force and rotational cutting force. Once the predetermined loosening depth is reached, the operator stops the rotary loosening operation, preparing for a switch to impact sampling or direct sampling. This workflow achieves a balance between directional stability and vertical sampling accuracy while ensuring sufficient operating space, thus improving the ease of operation and stability of the rotary loosening sampling process.

[0082] When the soil sampling device is used for direct impact sampling, its overall structure remains consistent with that of rotary loosening sampling, with only the working mode and assembly state being switched accordingly. First, the device is placed at the sampling location, aligning the bottom of the guide tube 11 with the target sampling point. The guide tube 11 also has a vertically penetrating opening at its front to provide space for the operation of the dual-purpose drill 24. The adjusting rod 12 drives the fixed cone 13 to insert into the ground, and the level bead 15 on the platform is used to correct the verticality of the guide tube 11, ensuring that the guide tube 11 maintains a stable and vertical reference state before sampling begins.

[0083] Subsequently, the dual-purpose drill 24 is installed inside the guide frame 22, and the output end housing of the dual-purpose drill 24 is clamped and fixed by the fixing ring 21, so that the dual-purpose drill 24 and the guide frame 22 form an integral structure. The guide structure of the guide frame 22 is still distributed within a 180° range along the circumferential direction, that is, a stable guide support structure is formed on the rear side of the guide tube 11, while no guide structure is set on the front side corresponding to the vertical opening of the guide tube 11. This ensures that the guide frame 22 can be stably raised and lowered in the vertical direction, while reserving space for the operator to hold the dual-purpose drill 24 for pressing operations.

[0084] In the direct impact sampling condition, the loosening mechanism 4 does not participate in the assembly. The operator places the straight pipe positioning plate 6 over the connector 3, so that the positioning hole 44 on the straight pipe positioning plate 6 is inserted and engaged with the outer side of the positioning block 52 at the top of the sampling tube 51. The connecting rod 35 passes through the straight pipe positioning plate 6 and the connector 3 and is then locked with a nut, thereby reliably fixing the connector 3 and the sampling tube 51 into one unit. After the assembly is completed, the operator holds the handle of the dual-purpose drill 24 and applies axial pressure downward through the vertical opening in front of the guide tube 11, and switches the dual-purpose drill 24 to the impact working mode.

[0085] At this point, the axial impact force output by the dual-purpose drill 24 is directly transmitted to the sampling tube 51 via the connecting rod 35 and the connecting head 3, causing the sampling tube 51 to gradually insert into the soil along the vertical direction of the guide tube 11 under the combined action of the impact force and manual pressing. Because the guide frame 22 moves stably downwards along the guide tube 11 under the constraint of its rear guide structure, the sampling tube 51 maintains a good vertical posture during the impact process, avoiding deviation or swaying. Simultaneously, the vertical opening at the front of the guide tube 11 ensures the operator's freedom of operation over the dual-purpose drill 24 during impact sampling, making the process smoother. Once the sampling tube 51 reaches the predetermined sampling depth, the impact operation stops, completing the acquisition of the soil sample. Through this workflow, efficient and stable sampling of relatively loose or medium-hard soils is achieved without the need for rotary loosening.

[0086] When a dual-purpose drill rig 24 with both rotary and impact drive functions is selected, the soil sampling device can also operate in a combined sampling mode that combines rotation and impact. The workflow is structurally consistent with the rotary loosening sampling operation, i.e., the loosening mechanism 4 is installed between the connector 3 and the dual-purpose drill rig 24, and a vertically penetrating opening is still provided in front of the guide pipe 11. The guide structure of the guide frame 22 is distributed within a 180° range along the circumferential direction, providing stable vertical guidance support to the guide frame 22 at the rear, while reserving space for the handle operation of the dual-purpose drill rig 24 at the front.

[0087] In the combined sampling mode, the operator holds the handle of the dual-purpose drill 24 and applies axial pressure downward through the vertical opening in front of the guide tube 11, setting the dual-purpose drill 24 to simultaneously output rotational power and axial impact force. At this time, the rotational power output by the dual-purpose drill 24 is transmitted to the soil loosening mechanism 4 through the connecting rod 35 and the connecting head 3, causing the spiral blade 45 and the cutter head 46 to continuously cut and loosen the soil; at the same time, the axial impact force output by the dual-purpose drill 24 acts on the soil loosening mechanism 4 and the structure below through the same power transmission path, so that the soil loosening mechanism 4 obtains periodic axial impact propulsion force while rotating and cutting.

[0088] The dual-purpose drill rig 24 can also be equipped with a drill rig that synchronizes rotation and impact. Under the combined action of rotation and impact, the loosening mechanism 4 can more effectively break up the soil structure in harder or denser soil layers, further loosening the soil on the basis of rotational cutting, thereby significantly reducing the overall drilling resistance. The guide frame 22 moves stably downward along the guide tube 11 under the constraint of its rear guide structure, ensuring that the overall structure always maintains vertical movement during the composite sampling process, while the vertical opening in front of the guide tube 11 ensures smooth operation when the operator holds the dual-purpose drill rig 24 for pressing and control. When the predetermined loosening or sampling depth is reached, the combined rotation and impact operation can be stopped as needed, or the operation can be switched to the single impact sampling mode to continue working. Through the above-mentioned composite workflow, this device has a stronger adaptability to high-density, highly cohesive, or gravelly soil layers, further expanding the application range of the soil sampling device.

[0089] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0090] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A geological exploration sampling device, comprising a guiding mechanism, characterized in that: The guide mechanism is internally slidably fitted with a guide mechanism, the bottom end of which holds a connector, and a straight tube for sampling is fitted externally to the connector. The guiding mechanism includes a guide tube capable of adjusting the vertical angle; The guiding mechanism includes a guide frame with guide wheels, the guide frame is slidably engaged with the inside of the guide tube, and a dual-purpose drill is mounted at the center of the guide frame, the output end central axis of the dual-purpose drill coincides with the central axis of the guide tube; The dual-purpose drilling rig has three working states: rotation, hammering, and rotation and hammering simultaneously. In the hammering working state, the top end of the straight pipe is engaged with the bottom end of the connector, and the top end of the straight pipe is fixed to the connector by a nut and a straight pipe positioning piece. The connector, which is directly fixed to the straight pipe, is clamped and fixed to the output end of the dual-purpose drill in the hammering state. In the state of rotating operation or rotating while hammering, the top end of the straight pipe is engaged with the bottom end of the connector, the top end of the connector is sleeved on the inside of the soil loosening mechanism, the top end of the connector penetrates the soil loosening mechanism, and the connector fixed to the soil loosening mechanism and the straight pipe is clamped and fixed to the output end of the dual-purpose drill in the rotating state.

2. The geological exploration sampling device according to claim 1, characterized in that: A platform is vertically welded to the top of the guide tube, and a spiral tube is welded to the outside of the platform. An adjusting rod is screwed into the inside of the spiral tube. A fixed cone is rotatably fitted to the bottom end of the adjusting rod. A test platform level, i.e., a level bead for the verticality of the guide tube, is set above the platform. An opening is provided at the front end of the guide tube.

3. The geological exploration sampling device according to claim 1, characterized in that: A fixing ring is welded to the inner side of the guide frame, and the fixing ring is clamped to the outside of the outer shell of the output end of the dual-purpose drill.

4. A geological exploration sampling device according to claim 3, characterized in that: The guide frame includes at least four guide structures, two of which are in the same plane, and the remaining guide structures are evenly distributed on one side of the guide structures in the same plane.

5. A geological exploration sampling device according to claim 1, characterized in that: At least two guide wheels are fixed to the outer side of the guide frame.

6. A geological exploration sampling device according to claim 1, characterized in that: The connector includes a connecting piece, and the outer side of the connecting piece is evenly provided with through grooves, and the gaps between the through grooves are evenly provided with retaining grooves.

7. A geological exploration sampling device according to claim 1, characterized in that: The straight tube includes a sampling tube, and a positioning block is welded to the top of the sampling tube. One end of the positioning block is welded to the inside of the sampling tube, and the other end extends to the outside of the sampling tube.

8. A geological exploration sampling device according to claim 1, characterized in that: The soil loosening mechanism includes a connecting strip, a butt plate welded to the top of the connecting strip, a spiral plate welded to the outer side of the connecting strip, and a cutter head welded evenly to the bottom of the connecting strip.

9. A geological exploration sampling device according to claim 8, characterized in that: The lower surface of the docking piece is provided with a positioning hole, and the structure of the straight tube positioning piece is the same as that of the docking piece.

10. A geological exploration sampling device according to claim 9, characterized in that: The surfaces of the connecting piece and the mating piece are respectively provided with vent holes and air holes.

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