Corer for geological exploration

Abstract

The invention provides a geological survey corer, and relates to the technical field of corers, the geological survey corer comprises a fixed pipe coaxially arranged with an inner rod, a plurality of side blocks are installed on the outer wall of the fixed pipe at equal intervals, guide rods are slidably installed in the side blocks, a plurality of telescopic grooves are formed in the side wall of the fixed pipe, and the telescopic grooves are communicated with the inner rod. The geological exploration coring device comprises a base, a plurality of telescopic grooves are formed in the base, a telescopic frame is slidably connected into each telescopic groove, a limiting pipe is installed on each telescopic frame, and transverse rods are installed on the two sides of each limiting pipe respectively, a set of innovative sampling pipe replacement system is designed for the geological exploration coring device, and the problem that a sampling pipe of traditional coring equipment is difficult to replace in field operation is thoroughly solved; the system adopts a mechanism of double fixation and one-key release, so that an operator can complete disassembly and assembly of the sampling tube without a professional tool, and when the sampling tube needs to be replaced, the system can automatically insert the bottom rod into the limiting tube only by moving the synchronous ring upwards.

Description

Technical Field

[0001] This invention relates to the field of core sampling technology, and more specifically, to a geological exploration core sampling device. Background Technology

[0002] In the fields of geological exploration and engineering exploration, the core sampler is the core equipment for obtaining underground rock and soil samples. Its performance directly affects the efficiency of exploration work and the quality of samples. Modern geological exploration work faces complex and diverse geological environments, including different stratigraphic structures such as soft soil layers, hard rock layers, gravel layers, and clay layers. Each geological condition places special requirements on sampling equipment. To adapt to this diversity, geological engineers need to select appropriate specifications and models of sampling tubes based on specific geological conditions, sampling depth, sample usage, and other factors. For example, thin-walled sampling tubes are needed in soft soil layers to reduce disturbance to the soil sample, while thick-walled or special material sampling tubes are needed in hard rock layers to withstand greater drilling resistance. In aquifers, sampling tubes with better sealing performance may be needed to prevent groundwater infiltration. In addition, different engineering projects have different requirements for sample length. Some require short continuous sampling, while others require long, complete rock cores. This requires the core sampler to be able to be equipped with a combination of sampling tubes of different lengths and diameters.

[0003] However, most geological exploration coring instruments on the market currently suffer from significant technical defects and operational inconveniences in sample tube replacement. Traditional coring instruments typically use threaded connections or snap-fit ​​installations to secure the sample tube. While these connection methods ensure stability during sampling, they present numerous challenges when replacing different models of sample tubes. Threaded connections require specialized tools for disassembly, are time-consuming, and are prone to connection instability due to thread wear. Snap-fit ​​installations, while relatively simple, often only accommodate specific sample tube specifications, lacking versatility. Welded installations are completely unsuitable for on-site replacement. More seriously, in field exploration environments, the working conditions are often harsh, lacking adequate tools and equipment. Technicians must complete sample tube replacement within a limited timeframe, and traditional replacement methods are not only time-consuming and labor-intensive but may also damage equipment or disrupt subsequent sampling operations due to improper operation. Summary of the Invention

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, the present invention provides a geological exploration core sampling tool to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a geological exploration core sampler, comprising a sampling tube and an internal rod coaxially mounted on the sampling tube; further comprising a fixing mechanism, the fixing mechanism comprising a fixing tube coaxially arranged with the internal rod, a plurality of side blocks equally spaced on the outer wall of the fixing tube, a guide rod slidably mounted in the side blocks, a plurality of telescopic grooves formed on the side wall of the fixing tube, a telescopic frame slidably connected in each telescopic groove, a limit tube mounted on the telescopic frame, and transverse rods mounted on both sides of the limit tube, a vertical groove formed on each transverse rod, a stop block corresponding to the vertical groove mounted on the side wall of the guide rod, and a plurality of limit grooves corresponding to the telescopic frame formed on the side wall of the internal rod; further comprising a driving mechanism, the driving mechanism comprising a lifting frame and a plurality of driven shafts rotatably connected in the lifting frame, the fixing tube being fixedly connected to the driven shafts.

[0006] Preferably, the fixing mechanism further includes a synchronization ring slidably connected to the fixing tube. Multiple insertion rods corresponding to the limiting tube are installed at equal intervals on the lower end face of the synchronization ring. A vertical spring is installed on each insertion rod. The synchronization ring achieves axial elastic linkage with the vertical spring through the insertion rods, ensuring flexible contact of the limiting tube when fixing and unlocking.

[0007] Preferably, each vertical spring has a bottom rod installed at its lower end, each bottom rod has an expansion block installed on it, and multiple expansion blocks are connected by ring springs. The bottom rods form radial elastic constraints with the ring springs through the expansion blocks, balancing the pressure at multiple points and maintaining synchronous movement.

[0008] Preferably, multiple spring pieces are installed at equal intervals on the inner wall of the synchronization ring, and multiple slots are opened at equal intervals on the outer wall of the fixing tube. The spring pieces and the expansion block respectively abut against the slots. The spring pieces and the expansion block cooperate with the slots to achieve multi-position locking, prevent the synchronization ring from sliding accidentally and enhance positioning stability.

[0009] Preferably, the insertion rod and the bottom rod are coaxially arranged. When in the fixed state, the insertion rod is inserted into the limiting tube, and when in the unlocked state, the bottom rod is inserted into the limiting tube. The coaxial insertion rod and the bottom rod are engaged in the limiting tube in different states, and dual locking and quick release are achieved by switching the contact points.

[0010] Preferably, a connecting block is installed at the lower end of each of the multiple guide rods, and the multiple connecting blocks are respectively connected to the annular spring. The connecting blocks are linked to the guide rods through the annular spring to ensure that all components are synchronously reset when the telescopic frame retracts.

[0011] Preferably, the upper end of the internal rod is equipped with a round head, and a circular groove is opened in the fixed tube. The round head abuts against the circular groove, and the conical surface of the round head and the circular groove cooperate to automatically correct the coaxiality, simplifying the installation process and reducing human adjustment errors.

[0012] Preferably, the drive mechanism further includes a fixed frame, the lifting frame is slidably connected to the fixed frame, a lifting motor is installed on the fixed frame, the extended end of the lifting motor is provided with a lead screw, the lead screw is threadedly connected to the lifting frame, and the lead screw drive converts the rotation of the lifting motor into the linear motion of the lifting frame, thereby realizing precise depth control of the sampling tube.

[0013] Preferably, a drive motor is fixedly installed on the lifting frame, a drive wheel is installed on the extended end of the drive motor, and driven wheels are respectively installed on multiple driven shafts. The drive wheel meshes with multiple driven wheels, and the gear set between the drive wheel and the driven wheel enables a single motor to drive multiple sampling tubes to rotate synchronously, thereby improving sampling efficiency and consistency.

[0014] Preferably, the lower ends of the sampling tubes are provided with multiple cutting grooves along the axis. The cutting grooves reduce the rotational resistance by reducing the contact area and enhance the ability of the sampling tubes to cut into hard layers.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a geological exploration core sampling tool, which has the following beneficial effects: This geological exploration coring device features an innovative sampling tube replacement system that completely solves the problem of difficult sampling tube replacement in field operations using traditional coring equipment. The system employs a dual-fixing and one-button release mechanism, allowing operators to disassemble and install the sampling tube without specialized tools. When a replacement tube is needed, simply move the synchronization ring upwards; the system will automatically insert the bottom rod into the limiting tube, simultaneously releasing the jamming between the stop block and the vertical groove. At this point, the operator simply pulls the sampling tube downwards; the rounded corners in the limiting groove easily disconnect the sampling tube from the fixing device. This user-friendly design shortens sampling tube replacement time from tens of minutes with traditional equipment to just a few minutes, improving the efficiency of field exploration work. It is particularly suitable for use in complex geological environments where frequent replacement of sampling tubes of different specifications is required.

[0016] This core extractor employs a dual-fixation mechanism to ensure stability and safety during the sampling process. The first level of fixation is achieved through the precise alignment of the insertion rod and the limiting tube. As the synchronization coil moves downward, the insertion rod precisely inserts into the limiting tube, forming initial fixation. The second level of fixation is achieved by inserting a stop block on the guide rod into the vertical groove, ensuring a firm connection between the transverse rod and the side block. This dual-fixation mechanism significantly improves stability during the sampling process and effectively prevents the sampling tube from loosening or falling off during high-intensity drilling. This multi-layered fixation method enables the core extractor to maintain stable operation under various complex geological conditions, greatly improving the sampling success rate and sample integrity, and providing reliable technical support for geological exploration work.

[0017] This core extractor employs an innovative self-locking design. Through the ingenious cooperation of the spring, expansion blocks, and slots, the synchronization coil is automatically locked in multiple positions. This design ensures that the synchronization coil can stably remain in the preset position during up-and-down movement, preventing positional displacement caused by accidental collisions or vibrations. Especially when operating in complex field environments, this self-locking function effectively prevents misoperation and improves the safety of equipment use. At the same time, the annular spring design between the expansion blocks provides a continuous outward expansion force, ensuring the reliability and stability of the locked state. This self-locking design not only simplifies the operation process and reduces the burden on operators, but also fundamentally improves the safety and reliability of equipment use, providing a more reliable technical guarantee for field geological exploration work. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a geological exploration core sampler according to the present invention; Figure 2 This is a schematic diagram of the drive motor and driven wheel in this invention; Figure 3 This is a schematic diagram of the internal rod and sampling tube in this invention; Figure 4 This is a schematic diagram of the structure of the fixed tube and the internal rod in this invention; Figure 5 This is a cross-sectional view of the fixed tube and internal rod in this invention; Figure 6 This is a cross-sectional view of the limiting tube and side block in this invention; Figure 7 For the present invention Figure 6 A magnified view of part A in the image; Figure 8 This is a schematic diagram of the synchronizing ring and the bottom rod in this invention; Figure 9 This is a schematic diagram of the structure of the fixed tube in this invention; Figure 10This is a schematic diagram of the telescopic frame in this invention; Figure 11 This is a schematic diagram of the sampling tube in this invention.

[0019] In the diagram: 11. Sampling tube; 12. Internal rod; 21. Fixing tube; 22. Side block; 23. Guide rod; 24. Telescopic groove; 25. Telescopic frame; 26. Limiting tube; 27. Horizontal rod; 28. Vertical groove; 29. ​​Stop block; 31. Lifting frame; 32. Driven shaft; 33. Fixing frame; 34. Lifting motor; 35. Lead screw; 36. Drive motor; 37. Drive wheel; 38. Driven wheel; 39. Cutting groove; 210. Limiting groove; 211. Synchronizing ring; 212. Insertion rod; 213. Vertical spring; 214. Bottom rod; 215. Expansion block; 216. Ring spring; 217. Spring piece; 218. Slot; 219. Connecting block; 220. Round head; 221. Round groove. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally 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 intended to limit this invention.

[0023] Please see Figures 1 to 11A geological exploration core sampler includes a sampling tube 11 and an internal rod 12 coaxially mounted on the sampling tube 11. It also includes a fixing mechanism, comprising a fixing tube 21 coaxially mounted with the internal rod 12. Multiple side blocks 22 are evenly spaced on the outer wall of the fixing tube 21. Guide rods 23 are slidably mounted within the side blocks 22. Multiple telescopic grooves 24 are formed on the side wall of the fixing tube 21. A telescopic frame 25 is slidably connected within each telescopic groove 24. A limit tube 26 is mounted on the telescopic frame 25, and transverse rods 27 are mounted on both sides of the limit tube 26. Each transverse rod 27 has a vertical groove 28. A stop block 29 corresponding to the vertical groove 28 is mounted on the side wall of the guide rod 23. Multiple limit grooves 210 corresponding to the telescopic frame 25 are formed on the side wall of the internal rod 12. The fixing mechanism also includes a synchronization ring 211 slidably connected to the fixing tube 21. Multiple insertion rods 21 corresponding to the limit tubes 26 are evenly spaced on the lower end face of the synchronization ring 211. 2. Each insertion rod 212 is equipped with a vertical spring 213, and each vertical spring 213 has a bottom rod 214 at its lower end. Each bottom rod 214 is equipped with an expansion block 215, and multiple expansion blocks 215 are connected by ring springs 216. Multiple spring pieces 217 are evenly spaced on the inner wall of the synchronization coil 211, and multiple slots 218 are evenly spaced on the outer wall of the fixing tube 21. The spring pieces 217 and expansion blocks 215 abut against the slots 218 respectively. The insertion rod 212 and the bottom rod 214 are coaxially arranged. When in the fixed state, the insertion rod 212 is inserted into the limiting tube 26. When in the unloaded state, the bottom rod 214 is inserted into the limiting tube 26. The lower ends of the multiple guide rods 23 are respectively equipped with connecting blocks 219, and the multiple connecting blocks 219 are respectively connected to the ring spring 216. The upper end of the inner rod 12 is equipped with a round head 220. A round groove 221 is opened in the fixing tube 21, and the round head 220 abuts against the round groove 221.

[0024] When it is necessary to replace different sampling tubes 11, the old sampling tube 11 must first be disconnected. Since the spring 217 on the synchronization ring 211 and the multiple expansion blocks 215 are respectively locked in multiple slots 218, and the lower expansion blocks 215 are equipped with ring springs 216, a force is generated that continuously locks them in the slots 218. Therefore, when the synchronization ring 211 moves the insertion rod 212 up and down, it will be fixed in multiple positions. At this time, the synchronization ring 211 is moved upward, and then the bottom rod 214 is inserted into the slot. Inside the limiting tube 26, the stop block 29 has already disengaged from the vertical groove 28, and the upper and lower ends of each limiting tube 26 are flexibly connected by the ring spring 216 and the vertical spring 213. Therefore, the telescopic frame 25 can slide along the side block 22. At this time, pulling the sampling tube 11 downward will cause the internal rod 12 to move downward. Since the telescopic rod is pressed against the limiting groove 210 and the limiting groove 210 is rounded, the connection between the two will be disengaged as the downward pull continues, thus completing the disengagement process.

[0025] When replacing the sampling tube 11, the corresponding internal rod 12 is inserted into the fixed tube 21. Then, the round head 220 will press against multiple telescopic frames 25, expanding the telescopic frames 25 outwards. As it continues to move upwards, the round head 220 presses against the round groove 221, and then the limiting groove 210 moves to the position of the telescopic frame 25. Under the action of the vertical spring 213 and the ring spring 216, the telescopic frame 25 is locked in the limiting groove 210. At this time, the limiting tube 26 returns to the coaxial position with the insertion rod 212, and then the synchronization ring 211 is pushed downwards. Multiple insertion rods 212 are inserted into the limiting tube 26, which provides the first level of limitation. The stop block 29 on the guide rod 23 also moves downward and is then inserted into the vertical groove 28, fixing the horizontal rod 27 and the side block 22. This provides the second level of fixation. The two levels of fixation ensure the stability of the fixation. Since the spring piece 217 and the expansion block 215 are respectively stuck in the slot 218, they are in the limiting state at the corresponding positions, thus ensuring the stability of use.

[0026] The drive mechanism includes a lifting frame 31 and multiple driven shafts 32 rotatably connected within the lifting frame 31. The fixed tube 21 is fixedly connected to the driven shafts 32. The drive mechanism also includes a fixed frame 33. The lifting frame 31 is slidably connected to the fixed frame 33. A lifting motor 34 is mounted on the fixed frame 33. A lead screw 35 is provided at the extended end of the lifting motor 34. The lead screw 35 is threadedly connected to the lifting frame 31. A drive motor 36 is fixedly mounted on the lifting frame 31. A drive wheel 37 is mounted at the extended end of the drive motor 36. Driven wheels 38 are respectively mounted on the multiple driven shafts 32. The drive wheel 37 meshes with the multiple driven wheels 38. Multiple cutting grooves 39 are respectively opened along the axis at the lower end of the multiple sampling tubes 11.

[0027] After the corresponding sampling tube 11 is replaced, the lifting motor 34 drives the lead screw 35 to rotate. Since the lead screw 35 is threadedly connected to the lifting frame 31, it will drive the lifting frame 31 to move up and down. Under the action of the drive motor 36, multiple sampling tubes 11 will rotate synchronously until they move to the ground. The sampling process is completed by sampling through multiple sampling tubes 11.

[0028] 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 the present invention 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 the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A geological exploration core sampler, comprising a sampling tube (11) and an internal rod (12) coaxially mounted on the sampling tube (11); characterized in that: It also includes a fixing mechanism, which includes a fixing tube (21) coaxially arranged with the internal rod (12). Multiple side blocks (22) are installed at equal intervals on the outer wall of the fixing tube (21). Guide rods (23) are slidably installed in the side blocks (22). Multiple telescopic grooves (24) are opened on the side wall of the fixing tube (21). A telescopic frame (25) is slidably connected in each telescopic groove (24). A limit tube (26) is installed on the telescopic frame (25), and a limit tube (26) is installed on both sides of the limit tube (26). There are horizontal rods (27), each of which has a vertical groove (28). The guide rod (23) has a stop (29) corresponding to the vertical groove (28) installed on its side wall. The inner rod (12) has multiple limiting grooves (210) corresponding to the telescopic frame (25) on its side wall. It also includes a drive mechanism, which includes a lifting frame (31) and multiple driven shafts (32) rotatably connected in the lifting frame (31). The fixed tube (21) is fixedly connected to the driven shafts (32).

2. A geological exploration core sampler according to claim 1, characterized in that: The fixing mechanism also includes a synchronization ring (211) slidably connected to the fixing tube (21). Multiple insertion rods (212) corresponding to the limiting tube (26) are installed at equal intervals on the lower end surface of the synchronization ring (211). A vertical spring (213) is installed on each insertion rod (212).

3. A geological exploration core sampler according to claim 2, characterized in that: Each vertical spring (213) has a bottom rod (214) installed at its lower end, and each bottom rod (214) has an expansion block (215) installed on it. A ring spring (216) is connected between the multiple expansion blocks (215).

4. A geological exploration core sampler according to claim 3, characterized in that: Multiple spring pieces (217) are installed at equal intervals on the inner wall of the synchronization coil (211), and multiple slots (218) are opened at equal intervals on the outer wall of the fixing tube (21). The spring pieces (217) and the expansion block (215) respectively abut against the slots (218).

5. A geological exploration core sampler according to claim 4, characterized in that: The insertion rod (212) and the bottom rod (214) are coaxially arranged. When in the fixed state, the insertion rod (212) is inserted into the limiting tube (26). When in the unloaded state, the bottom rod (214) is inserted into the limiting tube (26).

6. A geological exploration core sampler according to claim 5, characterized in that: Each of the guide rods (23) has a connecting block (219) installed at its lower end, and the connecting blocks (219) are connected to the annular spring (216).

7. A geological exploration core sampler according to claim 6, characterized in that: The upper end of the inner rod (12) is equipped with a round head (220), and a round groove (221) is opened in the fixed tube (21), and the round head (220) abuts against the round groove (221).

8. A geological exploration core sampler according to claim 1, characterized in that: The drive mechanism also includes a fixed frame (33), the lifting frame (31) is slidably connected to the fixed frame (33), the fixed frame (33) is equipped with a lifting motor (34), the extended end of the lifting motor (34) is provided with a lead screw (35), and the lead screw (35) is threadedly connected to the lifting frame (31).

9. A geological exploration core sampler according to claim 8, characterized in that: A drive motor (36) is fixedly installed on the lifting frame (31). A drive wheel (37) is installed on the extended end of the drive motor (36). A driven wheel (38) is installed on each of the multiple driven shafts (32). The drive wheel (37) meshes with the multiple driven wheels (38).

10. A geological exploration core sampler according to claim 1, characterized in that: The lower ends of the sampling tubes (11) are provided with multiple cutting grooves (39) along the axis.

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