Small drilling tool for hydrological engineering geological exploration

Abstract

The utility model discloses a kind of small drilling tools for hydrological engineering geological exploration, including drilling rod, and the top end of drilling rod is equipped with clamping rod, clamping rod outside is equipped with clamping sleeve, clamping sleeve outside is equipped with locking sleeve, clamping sleeve outside is equipped with release sleeve, release sleeve one side is equipped with locking frame, release sleeve inside is equipped with release block, locking frame is equipped with locking rod in, release sleeve outside is equipped with release plate, release plate one side is connected and is equipped with connecting block, connecting block other end is equipped with clamping block, clamping groove is opened in clamping rod outside, release plate one side is connected and is equipped with tension spring, clamping sleeve outside is equipped with storage groove, clamping sleeve outside is equipped with multiple locking grooves, locking rod one end is connected and is equipped with locking plate, locking rod outside is equipped with locking spring, locking spring is connected with locking plate and locking frame, the utility model realizes mechanized drilling work, reduces manual labor, improves drilling efficiency, and while realizing the convenient replacement of drilling rod, the stable installation of drilling rod is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of drilling technology for hydrogeological exploration, and more specifically, it relates to a small drilling tool for hydrogeological exploration. Background Technology

[0002] In existing technologies, small drilling tools used in hydrogeological engineering exploration are crucial equipment in hydrogeological work. Their ease of operation, connection stability, and work efficiency directly affect the quality and progress of exploration work. However, existing small drilling tools have many shortcomings. Typically, operators need to manually carry the drilling equipment to the designated exploration location, and the entire drilling process requires manual operation. This method not only greatly increases the labor intensity of operators, putting them under high load for extended periods, but also easily leads to physical fatigue, affecting operational accuracy and work efficiency. At the same time, handheld operation makes it difficult to ensure precise control of drilling angle and depth, especially in complex terrain or long-term operation, making it difficult to guarantee the accuracy and reliability of drilling data. Furthermore, since handheld drilling cannot utilize the stable support provided by mechanical fixing devices, problems such as shaking and deviation often occur during drilling, which not only reduces the quality of sampling but may also lead to premature wear or breakage of the drill bit, increasing equipment maintenance costs and safety risks. In some work requiring deep drilling, handheld operation is even more difficult to provide sufficient stability and downforce, severely limiting the depth and scope of exploration work and failing to meet the accuracy and depth requirements of modern hydrogeological exploration work.

[0003] Secondly, in existing technologies, the connection and disconnection between the drive assembly output and the drill rod typically requires specialized tools. This design has significant drawbacks. In field exploration, different types or specifications of drill rods often need to be replaced depending on the geological conditions. Traditional connection methods often require multiple specialized tools such as wrenches, screwdrivers, and hammers to complete the disassembly and assembly, making the process cumbersome and complex. This series of operations is not only time-consuming and labor-intensive, greatly reducing work efficiency, but also requires operators to carry various tools, increasing the equipment burden. In harsh field environments, such as rainy days, cold or high-temperature conditions, this complex disassembly and assembly operation is even more difficult, and improper operation may even lead to damage or loss of parts. Especially in some work that requires frequent replacement of drill rods, this time-consuming connection method seriously affects the exploration progress, makes it impossible to conveniently replace drill rods, and greatly reduces the practicality and work efficiency of the equipment.

[0004] Furthermore, while some improved equipment has achieved convenient replacement of drill rods through innovative connection mechanisms, improving operational efficiency, these improvements often prioritize ease of operation while neglecting the crucial factor of connection stability. These quick-connect devices are mostly simple in structure and lack overall stability. During drilling, the contact between the drill bit and the formation generates continuous vibration, impact, and torque. These forces constantly act on the connection structure, easily causing the simple connection to gradually loosen. In addition, the complex and variable environment of field geological exploration, where equipment is frequently subjected to collisions, drops, or other external impacts, further exacerbates the instability of the connection structure. With prolonged use, the reliability of the connection is further reduced, potentially leading to unexpected loosening or even complete detachment of the connection structure during drilling. If the drill rod detaches while rotating at high speed, it will not only interrupt drilling work and affect the exploration progress but may also cause serious safety accidents, endangering the safety of operators and even damaging surrounding equipment and the environment, resulting in significant economic losses and safety hazards for the exploration work. Utility Model Content

[0005] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a small drilling tool for hydrogeological exploration to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a small drilling tool for hydrogeological exploration, comprising a drill rod, a detachable locking rod at the top of the drill rod, a detachable locking sleeve on the outside of the locking rod, a locking sleeve on the outside of the locking sleeve, the locking sleeve being threadedly mounted on the outside of the locking sleeve, a release sleeve rotatably mounted on the outside of the locking sleeve, a locking frame fixedly mounted on one side of the release sleeve, a release block fixedly mounted on the inside of the release sleeve, a locking rod slidably mounted in the locking frame, and a release plate on the outside of the release sleeve. A connecting block is fixedly connected to one side of the release plate, and a locking block is fixedly connected to the other end of the connecting block. A locking groove is opened on the outer side of the locking rod, and the locking block is inserted into the locking groove. A tension spring is connected to one side of the release plate, and a storage groove is opened on the outer side of the locking sleeve. The other end of the tension spring is connected to the inner wall of the storage groove. Multiple locking grooves are opened on the outer side of the locking sleeve. One end of the locking rod is inserted into the locking groove, and a locking plate is connected to one end of the locking rod. A locking spring is movably sleeved on the outer side of the locking rod, and both ends of the locking spring are connected to the locking plate and the locking frame, respectively.

[0007] The present invention is further configured such that a frame is provided on one side of the drill rod, a movable wheel is detachably provided on one side of the frame, and a handle is fixedly connected to the top of the frame. This combined support structure design greatly improves the mobility and ease of operation of the equipment. The frame provides a sturdy and stable support platform for the entire drilling system, the detachable movable wheel allows the equipment to be easily moved to different exploration locations without manual handling, and the fixedly connected handle provides operators with convenient control points, making the tilting, pushing and positioning operations of the equipment easy and free.

[0008] The present invention is further configured such that ground nails are fixedly provided at the bottom of the frame. This self-anchoring design greatly enhances the stability and safety of drilling operations. The ground nails can be firmly inserted into the soil by simply applying downward force, providing a reliable fixed support point for the entire drilling system. This effectively prevents equipment shaking and displacement that may occur during drilling, ensures precise control of the drilling angle and accuracy of sampling data, and eliminates the problem of operators needing to continuously apply force to fix the equipment in traditional handheld operation. This greatly reduces the risk of fatigue caused by long-term operation and improves the quality and efficiency of exploration work.

[0009] This invention is further configured such that a lifting frame is provided on one side of the frame, and a lead screw is rotatably provided on the inner side of the frame. The lifting frame is movably connected to the lead screw via a thread. A drive assembly is detachably provided at the top of the lifting frame, and a connecting sleeve is connected to the output end of the drive assembly. The top end of the drill rod is detachably inserted into the inner side of the connecting sleeve. A lifting motor is detachably provided on the inner side of the frame, and the output end of the lifting motor is detachably connected to the top end of the lead screw. This precise electric lifting system completely solves the limitations of traditional handheld drilling in terms of depth and accuracy control. The motor drives the lead screw to rotate, which in turn drives the lifting frame to descend smoothly via a thread, providing stable and continuous downward pressure and rotational power for the drilling process, ensuring precise control of the drilling depth.

[0010] The present invention is further configured such that a sliding sleeve is detachably provided on one side of the lifting frame, and a sliding rod is fixedly provided on the inner side of the frame. The sliding sleeve is slidably sleeved on the outer side of the sliding rod. This double-track guide structure design significantly enhances the stability and accuracy during the drilling process. The sliding cooperation between the sliding sleeve and the sliding rod provides additional support and guidance for the lifting frame, effectively preventing the swaying and offset that may occur in the screw thread connection under drilling load, and ensuring that the drill rod always moves on the preset vertical track.

[0011] The present invention is further provided with multiple anti-slip strips fixed on the outer side of the locking sleeve. This humanized anti-slip design greatly improves the ease of operation and safety of the equipment in complex outdoor environments. The anti-slip strips increase the friction of the outer surface of the locking sleeve, so that the operator can firmly grip and accurately control the rotation of the locking sleeve even when the gloves are wet or covered with mud, effectively avoiding operational errors and safety risks caused by slipping.

[0012] The present invention is further configured such that both the outer side of the release block and the inner side of the release plate adopt a variable diameter structure design. This ingenious variable diameter structure design greatly improves the smoothness and stability of the release mechanism.

[0013] The present invention is further configured such that one end of the locking rod and the edge of the inner wall of the locking groove are both treated with a rounded corner structure. This fine rounded corner structure design significantly improves the service life and operation smoothness of the locking mechanism. The rounded corner design eliminates the stress concentration of sharp corners that may be generated during the contact between the locking rod and the locking groove, effectively reducing material fatigue and wear caused by long-term use and frequent operation. At the same time, the rounded corner structure also makes the locking rod move in and out of the locking groove more smoothly, reducing the operating resistance.

[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides a small drilling tool for hydrogeological exploration, which has the following advantages: 1. By setting up an integrated support system consisting of a frame, casters, handles, ground spikes, a lifting frame, lead screw, sliding sleeve, sliding rod, and lifting motor, the existing technology effectively solves the problem of needing to manually lift the device to a designated location and perform drilling work by hand. When the equipment needs to be used, the operator can tilt the entire frame by the handle, then push the frame, and rely on the casters installed on one side of the frame to quickly move the equipment to a suitable location; by applying downward force, the ground spikes at the top of the frame are inserted into the soil, achieving a firm fixation of the frame; starting the drive assembly drives the connecting sleeve to rotate, thereby driving the drill rod to rotate; at the same time, starting the lifting motor drives the lead screw to rotate forward. The lifting frame, connected to the lead screw via a threaded connection, lowers the drive assembly and drill rod, causing the sliding sleeve to descend along the slide rod. This allows the drill rod to enter the soil for drilling. This design significantly reduces the operator's workload, preventing fatigue from prolonged hand-held operation. Furthermore, the mechanical fixing device provides stable support, effectively solving problems such as shaking and deviation during drilling. This ensures precise control of drilling angle and depth, improves sampling quality and the accuracy of drilling data, and reduces drill bit wear and breakage risk, meeting the stringent requirements of precision and depth in modern hydrogeological exploration.

[0015] 2. The quick-connect system, composed of components such as a locking rod, locking sleeve, locking sleeve, release sleeve, release block, release plate, connecting block, locking block, and tension spring, completely solves the problem in existing technologies where connecting and disconnecting the drive assembly output end and the drill rod requires specialized tools. When the drill rod needs to be replaced, the operator only needs to perform simple rotation and pulling actions to remove or connect the locking sleeve and locking rod, thus achieving quick assembly and disassembly of the drill rod. This innovative quick-connect system greatly simplifies the drill rod replacement process, eliminating the need for specialized tools such as wrenches, screwdrivers, and hammers, significantly reducing operational difficulty, saving maintenance time and labor intensity, and alleviating the equipment burden on field exploration personnel. Even in harsh field environments, such as rainy, cold, or high-temperature conditions, operators can easily complete the drill rod replacement work. It is suitable for exploration work that requires frequent replacement of different types or specifications of drill rods, greatly improving the practicality and work efficiency of the equipment.

[0016] 3. Through a multi-layered safety locking system, including the secure insertion of the locking rod into the locking groove and the locking sleeve limiting the outer wall of the locking plate, the system successfully solves the problems of simple structure and low stability of existing quick-connection devices. After the drill rod is installed, the system forms multiple layers of protection through a progressive locking mechanism: first, the locking rod is inserted into the locking groove under the action of the locking spring to form the first layer of locking; second, the inner wall of the locking sleeve limits the outer wall of the locking plate to form the second layer of locking; finally, the locking rod and the locking groove cooperate to limit the locking frame and the release sleeve, preventing the release sleeve from rotating. These carefully designed structural details ensure that the connecting components remain firmly connected under continuous vibration, impact, and torque generated during drilling. Facing collisions, drops, or other external impacts that may be encountered in the field environment, the multiple locking mechanisms can effectively prevent the connection structure from loosening and failing. It effectively avoids the risk of the drill rod accidentally loosening or even completely falling off under high-speed rotation, eliminates the drilling interruption and safety hazards that may be caused by connection failure, and provides a solid guarantee for the safe and stable conduct of hydrogeological exploration work. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a small drilling tool for hydrogeological exploration according to the present invention; Figure 2 This is a schematic diagram of the overall structure from a second perspective in this utility model; Figure 3 This is a schematic diagram of the structure of the locking sleeve, locking rod, locking sleeve and release sleeve in this utility model; Figure 4 This is a cross-sectional structural diagram of the locking sleeve, locking rod, locking sleeve and release sleeve in this utility model; Figure 5 This is a schematic diagram of the dispersed structure of the locking sleeve and the release sleeve in this utility model.

[0018] In the diagram: 1. Drill rod; 2. Locking rod; 3. Locking sleeve; 4. Locking sleeve; 5. Release sleeve; 6. Locking frame; 7. Release block; 8. Locking rod; 9. Release plate; 10. Connecting block; 11. Locking block; 12. Locking groove; 13. Tension spring; 14. Storage groove; 15. Locking groove; 16. Locking plate; 17. Locking spring; 18. Frame; 19. Casters; 20. Handle; 21. Ground stake; 22. Lifting frame; 23. Lead screw; 24. Drive assembly; 25. Connecting sleeve; 26. Lifting motor; 27. Sliding sleeve; 28. Sliding rod; 29. ​​Anti-slip strip. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0021] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0022] Please see Figures 1-5A small drilling tool for hydrogeological exploration includes a drill rod 1, a detachable locking rod 2 at the top of the drill rod 1, a detachable locking sleeve 3 on the outside of the locking rod 2, a locking sleeve 4 on the outside of the locking sleeve 3, the locking sleeve 4 being threadedly installed on the outside of the locking sleeve 3, a release sleeve 5 being rotatably installed on the outside of the locking sleeve 3, a locking frame 6 fixedly mounted on one side of the release sleeve 5, a release block 7 fixedly mounted on the inside of the release sleeve 5, a locking rod 8 slidingly mounted in the locking frame 6, a release plate 9 on the outside of the release sleeve 5, and a connecting block 10 fixedly connected to one side of the release plate 9. The other end of the connecting block 10 is fixedly connected to a locking block 11. The locking rod 2 has a locking groove 12 on its outer side. The locking block 11 is inserted into the locking groove 12. A tension spring 13 is connected to one side of the release plate 9. A storage groove 14 is opened on the outer side of the locking sleeve 3. The other end of the tension spring 13 is connected to the inner wall of the storage groove 14. Multiple locking grooves 15 are opened on the outer side of the locking sleeve 3. One end of the locking rod 8 is inserted into the locking groove 15. A locking plate 16 is connected to one end of the locking rod 8. A locking spring 17 is movably sleeved on the outer side of the locking rod 8. The two ends of the locking spring 17 are connected to the locking plate 16 and the locking frame 6, respectively.

[0023] A frame 18 is provided on one side of the drill rod 1, and a movable wheel 19 is detachably provided on one side of the frame 18. A handle 20 is fixedly connected to the top of the frame 18.

[0024] Ground nails 21 are fixed at the bottom of the frame 18. A lifting frame 22 is provided on one side of the frame 18. A lead screw 23 is rotatably provided inside the frame 18. The lifting frame 22 is movably connected to the lead screw 23 by a thread. A drive assembly 24 is detachably provided at the top of the lifting frame 22. A connecting sleeve 25 is connected to the output end of the drive assembly 24. The top end of the drill rod 1 is detachably inserted into the inside of the connecting sleeve 25. A lifting motor 26 is detachably provided inside the frame 18. The output end of the lifting motor 26 is detachably connected to the top end of the lead screw 23.

[0025] A sliding sleeve 27 is detachably provided on one side of the lifting frame 22, and a sliding rod 28 is fixedly provided on the inner side of the frame 18. The sliding sleeve 27 is slidably sleeved on the outer side of the sliding rod 28.

[0026] In this embodiment, when the equipment is needed, the frame 18 is first tilted by the handle 20, and then the frame 18 is pushed by the handle 20 to move it to a suitable location via the casters 19 mounted on one side. The handle 20 is then released to allow the frame 18 to be placed smoothly on the ground. The ground nail 21 at the top of the frame 18 is inserted into the soil by applying downward force to fix the frame 18. The drive assembly 24 is then turned on to rotate the connecting sleeve 25, thereby rotating the drill rod 1. The lifting motor 26 is then turned on, causing the lead screw 23 connected to the output end to rotate in the forward direction. Since the lifting frame 22 is movably connected to the lead screw 23 via threads, the lifting frame 22 will drive the drive assembly 24 and the drill rod 1 to descend, and the lifting frame 22 will drive the sliding sleeve 27 to descend along the sliding rod 28, thereby allowing the drill rod 1 to enter the soil for drilling.

[0027] Please see Figures 3-5 As a further implementation of the overall equipment: multiple anti-slip strips 29 are fixedly provided on the outer side of the locking sleeve 4.

[0028] Both the outer side of the release block 7 and the inner side of the release plate 9 adopt a variable diameter structure design.

[0029] Both the locking rod 8 and the inner edge of the locking groove 15 are rounded.

[0030] More specifically, when the drill rod 1 needs to be replaced, first rotate the locking sleeve 4 forward. The locking sleeve 4 will move along the thread on the outer wall of the retaining sleeve 3, so that the locking sleeve 4 no longer limits the locking plate 16. Then rotate the release sleeve 5 forward. The release sleeve 5 will drive the locking frame 6 on one side to rotate forward, so that the locking frame 6 drives the locking spring 17, the locking plate 16 and the locking rod 8 to rotate forward. Then the inner wall of the locking groove 15 presses against one end of the locking rod 8, so that one end of the locking rod 8 slides out of the locking groove 15, and the other end of the locking rod 8 will drive the locking spring 17 to pull outward. At the same time, the release sleeve 5 will activate the variable diameter structure design. When the release block 7 rotates clockwise, it pushes the release plate 9 outward, causing the release plate 9 to stretch the tension spring 13 in the receiving groove 14 outward. Simultaneously, the release plate 9, through the connecting block 10, causes the locking block 11 to disengage from the locking groove 12. Then, the locking sleeve 3 and locking rod 2 are pulled to both sides to remove them. Next, the drill rod 1 is pulled downward to remove it. The drill rod 1 is then replaced. After replacement, the tip of the new drill rod 1 is inserted into the connecting sleeve 25, ensuring that the connecting sleeve 25 and the pre-drilled mounting hole at the tip of the drill rod 1 are concentrically aligned. Then, the locking rod 2 passes through the mounting hole from one end, and the locking sleeve 3 is fitted onto the outside of the locking rod 2 from the other side. Then, the release sleeve 5 is rotated in the opposite direction. The release sleeve 5 will drive the locking rod 8, the locking plate 16, and the locking spring 17 to rotate in the opposite direction through the locking frame 6. At the same time, the release sleeve 5 will drive the release block 7 to rotate in the opposite direction. During this process, the tension spring 13 returns to its original position and pulls the release plate 9, so that the inner wall of the release plate 9 is always in contact with the outer wall of the release block 7. Then, the tension spring 13 will gradually retract into the storage groove 14, and the release plate 9 will drive the locking block 11 to re-insert into the locking groove 12 through the connecting block 10. At this time, the locking frame 6... The locking rod 8 and other components rotate back to the position corresponding to the original locking groove 15. Then, the locking spring 17 resets and pulls the locking plate 16, causing the locking plate 16 to drive the locking rod 8 to slide inward and reset. Then, one end of the locking rod 8 is reinserted into the original locking groove 15. Then, the locking sleeve 4 is rotated in the opposite direction, so that the inner wall of the locking sleeve 4 limits the outer wall of the locking plate 16, preventing the locking plate 16 and the locking rod 8 from sliding outward. Then, the locking rod 8 and the locking groove 15 cooperate to limit the locking frame 6 and the release sleeve 5, preventing the release sleeve 5 from rotating. This ensures the installation stability of the drill rod 1 and ensures the stable progress of drilling work.

[0031] In summary, when using or operating the equipment: First, tilt the frame 18 by using handle 20, then push the frame 18 by using handle 20 to move it to a suitable location via the casters 19 mounted on one side. Then, release handle 20 to allow the frame 18 to be placed smoothly on the ground. Apply downward force to insert the ground nail 21 at the top of the frame 18 into the soil to fix the frame 18. Then, turn on the drive assembly 24 to rotate the connecting sleeve 25, thereby rotating the drill rod 1. Then, turn on the lifting motor 26, which drives the lead screw 23 connected to the output end to rotate forward. Since the lifting frame 22 is movably connected to the lead screw 23 via threads, the lifting frame 22 will drive the drive assembly 24 and the drill rod 1 to descend, and the lifting frame 22 will drive the sliding sleeve 27 to descend along the sliding rod 28, thereby allowing the drill rod 1 to enter the soil for drilling.

[0032] When drill rod 1 needs to be replaced, first rotate locking sleeve 4 clockwise. Locking sleeve 4 will move along the threads on the outer wall of locking sleeve 3, so that locking sleeve 4 no longer limits locking plate 16. Then rotate release sleeve 5 clockwise. Release sleeve 5 will drive one side of locking frame 6 to rotate clockwise, so that locking frame 6 drives locking spring 17, locking plate 16 and locking rod 8 to rotate clockwise. Then the inner wall of locking groove 15 presses against one end of locking rod 8, so that one end of locking rod 8 slides out of locking groove 15, and the other end of locking rod 8 will drive locking spring 17 to pull outward. At the same time, release sleeve 5 will drive the release sleeve with variable diameter structure design. When block 7 rotates clockwise, it pushes release plate 9 outward, causing release plate 9 to stretch spring 13 in storage groove 14 outward. Simultaneously, release plate 9, through connecting block 10, causes locking block 11 to disengage from locking groove 12. Then, locking sleeve 3 and locking rod 2 are pulled to both sides to remove them. Next, drill rod 1 is pulled downward to remove it. Drill rod 1 is then replaced. After replacement, the tip of the new drill rod 1 is inserted into connecting sleeve 25, ensuring that connecting sleeve 25 and the pre-drilled mounting hole at the tip of drill rod 1 are concentrically aligned. Then, the locking rod 2 passes through the mounting hole from one end, and the locking sleeve 3 is fitted onto the outside of the locking rod 2 from the other side. Then, the release sleeve 5 is rotated in the opposite direction. The release sleeve 5 will drive the locking rod 8, the locking plate 16, and the locking spring 17 to rotate in the opposite direction through the locking frame 6. At the same time, the release sleeve 5 will drive the release block 7 to rotate in the opposite direction. During this process, the tension spring 13 returns to its original position and pulls the release plate 9, so that the inner wall of the release plate 9 is always in contact with the outer wall of the release block 7. Then, the tension spring 13 will gradually retract into the storage groove 14, and the release plate 9 will drive the locking block 11 to re-insert into the locking groove 12 through the connecting block 10. At this time, the locking frame 6 drives the release plate 9 to rotate in the opposite direction. The locking rod 8 and other components rotate back to the position corresponding to the original locking groove 15. Then, the locking spring 17 resets and pulls the locking plate 16, causing the locking plate 16 to drive the locking rod 8 to slide inward and reset. Then, one end of the locking rod 8 is reinserted into the original locking groove 15. Then, the locking sleeve 4 is rotated in the opposite direction, so that the inner wall of the locking sleeve 4 limits the outer wall of the locking plate 16, preventing the locking plate 16 and the locking rod 8 from sliding outward. Then, the locking rod 8 and the locking groove 15 cooperate to limit the locking frame 6 and the release sleeve 5, preventing the release sleeve 5 from rotating. This ensures the installation stability of the drill rod 1 and ensures the stable progress of drilling work.

[0033] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A small drilling tool for hydrogeological exploration, comprising a drill rod (1), characterized in that: The drill rod (1) is detachably equipped with a locking rod (2) at its top end. A locking sleeve (3) is detachably fitted on the outside of the locking rod (2). A locking sleeve (4) is provided on the outside of the locking sleeve (3). The locking sleeve (4) is movably installed on the outside of the locking sleeve (3) by means of threads. A release sleeve (5) is rotatably installed on the outside of the locking sleeve (3). A locking frame (6) is fixed on one side of the release sleeve (5). A release block (7) is fixed on the inside of the release sleeve (5). A locking mechanism (6) is slidably provided in the locking frame (6). The rod (8), the release sleeve (5) is provided with a release plate (9) on the outside, a connecting block (10) is connected to one side of the release plate (9), a locking block (11) is connected to the other end of the connecting block (10), a locking groove (12) is opened on the outside of the locking rod (2), the locking block (11) is inserted into the locking groove (12), a tension spring (13) is connected to one side of the release plate (9), a storage groove (14) is opened on the outside of the locking sleeve (3), a plurality of locking grooves (15) are opened on the outside of the locking sleeve (3), and a locking rod (8) is one The end connection is provided with a locking plate (16), and a locking spring (17) is sleeved on the outside of the locking rod (8). The locking spring (17) is connected to the locking plate (16) and the locking frame (6); a frame (18) is provided on one side of the drilling rod (1), and a movable wheel (19) is detachably provided on one side of the frame (18). A handle (20) is fixedly connected to the top of the frame (18); a ground nail (21) is fixedly provided at the bottom of the frame (18); a lifting frame (22) is provided on one side of the frame (18), and the frame (18) is... The inner side of the frame (18) is provided with a lead screw (23), and the lifting frame (22) is movably connected to the lead screw (23) by a thread. The top of the lifting frame (22) is detachably provided with a drive assembly (24), and the output end of the drive assembly (24) is connected with a connecting sleeve (25). The top end of the drill rod (1) is detachably inserted into the inner side of the connecting sleeve (25). The inner side of the frame (18) is detachably provided with a lifting motor (26), and the output end of the lifting motor (26) is detachably connected to the top end of the lead screw (23).

2. The small drilling tool for hydrogeological exploration according to claim 1, characterized in that: The lifting frame (22) is detachably provided with a sliding sleeve (27) on one side, and a sliding rod (28) is fixedly provided on the inner side of the frame (18). The sliding sleeve (27) is slidably sleeved on the outer side of the sliding rod (28).

3. The small drilling tool for hydrogeological exploration according to claim 1, characterized in that: Multiple anti-slip strips (29) are fixedly provided on the outside of the locking sleeve (4).

4. A small drilling tool for hydrogeological exploration according to claim 1, characterized in that: The outer side of the release block (7) and the inner side of the release plate (9) both adopt a variable diameter structure design.

5. A small drilling tool for hydrogeological exploration according to claim 4, characterized in that: Both the locking rod (8) and the inner edge of the locking groove (15) are rounded.

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