Rock stratum sampling device for geological exploration

Abstract

The invention provides a rock stratum sampling device for geological prospecting, and relates to the technical field of geological prospecting, the rock stratum sampling device comprises a drill pipe and an inner pipe, the inner pipe is installed in the drill pipe, the two sides of the inner pipe are both provided with a plurality of groups of side openings, the two sides of the interior of the drill pipe are both provided with embedded grooves, and the interiors of the embedded grooves are provided with material removing assemblies; the material removing assembly comprises a frame, a movable plate and a supporting strip, the supporting strip is fixed to one side of the interior of the embedded groove, the frame is arranged on one side of the supporting strip, the movable plate is arranged in the frame in a sliding mode, an opening is formed in the frame, and an elastic trapezoidal block is elastically installed on one side of the movable plate. Efficient loosening and unloading of rock stratum samples are achieved, manual beating is not needed, and device damage is effectively avoided; a single power source is adopted to drive multiple groups of unloading components to synchronously run, the operation is convenient, and energy is saved; the inner pipe and the drill pipe are convenient to assemble and disassemble, and interference in the assembling and disassembling process is avoided through the elastic inward shrinkage function of the elastic trapezoidal blocks.

Description

Technical Field

[0001] This invention relates to the field of geological exploration technology, and in particular to a rock stratum sampling device for geological exploration. Background Technology

[0002] In the field of geological exploration, rock strata sampling is a core step in mineral resource exploration, engineering geological condition assessment, and geological structure analysis. The quality and efficiency of rock sampling directly affect the accuracy of subsequent geological research and engineering decisions. Currently, the industry commonly uses a rock strata sampling device consisting of a drill pipe and an inner tube to complete sampling operations. This type of device uses a drilling rig to drive the drill pipe to rotate and drill. The drill teeth at the bottom of the drill pipe break up the rock strata, and the broken rock samples are extracted into the inner tube under the action of drilling thrust and soil pressure. After sampling, the entire device is lifted to the surface, and the connection between the inner tube and the drill pipe is disassembled to remove the rock samples from the inner tube for subsequent testing and analysis. This sampling method can directly obtain rock strata samples from different depths underground and can better preserve the original structure and composition characteristics of the rock strata, therefore it is widely used in various geological exploration projects.

[0003] However, existing rock sampling devices still have many technical shortcomings in practical applications, making it difficult to meet the requirements of efficient and low-loss sampling: First, unloading after sampling is difficult. Existing devices lack dedicated unloading auxiliary structures, usually requiring operators to manually tap the inner tube or drill pipe to loosen the rock sample and release it. It is difficult to accurately control the force of manual tapping. Excessive force will cause deformation or cracking of components such as the inner tube and drill pipe, shortening the service life of the device. Insufficient force will not be able to loosen the sample completely, resulting in low unloading efficiency. Second, some sampling devices equipped with unloading mechanisms often use multiple power sources to drive the sampling device separately. The use of unloading components at different locations not only leads to complex device structures and high failure rates, but also results in high energy consumption and cumbersome operation. Furthermore, the coordinated control of multiple power sources is difficult, and asynchronous unloading actions are prone to occur. Thirdly, the ease of assembling and disassembling the inner tube and the drill pipe is poor. The unloading structure and the inner tube installation structure of the existing device interfere with each other. When installing the inner tube, it is necessary to disassemble part of the unloading components first, and when disassembling the inner tube, it is also necessary to adjust the unloading structure. The assembly and disassembly process is cumbersome, which greatly extends the sampling interval time and reduces the overall exploration efficiency. Therefore, this invention proposes a rock stratum sampling device for geological exploration to solve the problems existing in the prior art. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a rock stratum sampling device for geological exploration. This device enables efficient loosening and unloading of rock stratum samples without the need for manual hammering, effectively preventing damage to the device. It employs a single power source to drive multiple unloading components to operate synchronously, making operation convenient and energy-saving. The inner tube and drill pipe are easy to assemble and disassemble, and the elastic trapezoidal block's elastic inward retraction function avoids interference during the assembly and disassembly process.

[0005] To achieve the objective of this invention, the invention is implemented through the following technical solution: a rock stratum sampling device for geological exploration, comprising a drill pipe and an inner pipe, wherein the inner pipe is installed inside the drill pipe and both sides of the inner pipe are provided with side openings, and multiple sets of side openings are provided; both sides of the inside of the drill pipe are provided with embedded grooves, and the inside of the embedded grooves is provided with a material removal component. The material rejection assembly includes a frame, a movable plate, and a support bar. The support bar is fixed to one side inside the embedded groove. The frame is located on one side of the support bar. The movable plate is slidably located inside the frame, and the frame has an opening. An elastic trapezoidal block is elastically installed on one side of the movable plate, and the elastic trapezoidal block extends through the opening into the interior of the side opening. The movable plate is driven to slide by an eccentric component.

[0006] A further improvement is that: at least three sets of the side openings form a unit opening, the frame has multiple sets corresponding to the unit openings, and each set of the frame has at least three sets of the elastic trapezoidal blocks on the movable plate inside, and the inner side of the elastic trapezoidal blocks and the inner side of the side openings are located on the same plane.

[0007] A further improvement is that: the movable plate has an inner cavity, one side of the elastic trapezoidal block extends into the inner cavity and is provided with a limiting piece, the diameter of the limiting piece is larger than the diameter of the elastic trapezoidal block penetrating the movable plate, and a spring is connected between the limiting piece and one side of the inner cavity.

[0008] A further improvement is that: the eccentric components in each set of the frame are driven by sprockets, and the multiple sets of sprockets are connected by chains to rotate synchronously. The drill pipe at the outer position of the support bar has a rear cavity, and the multiple sets of sprockets and chains are located inside the rear cavity.

[0009] A further improvement is that a polygonal rod is provided at the middle of the outer side of the upper sprocket, and an extension port is provided at the upper ends of both sides of the drill pipe. The polygonal rod extends out of the extension port and is driven by a drive mechanism, which includes a motor and a polygonal sleeve. The polygonal sleeve is connected to the output end of the motor and is adapted to the polygonal rod.

[0010] A further improvement is that: guide rods are provided at both ends inside the frame, and guide grooves are provided at both ends inside the movable plate, and the movable plate is slidably mounted on the guide rods through the guide grooves.

[0011] A further improvement is that the eccentric component includes a drive block, a drive wheel, and a drive shaft. The drive wheel is rotatably mounted on the inner side of the support bar and is connected to the sprocket. The drive shaft is located at the edge of one side of the drive wheel. The drive block is located at the middle position of the movable plate away from the elastic trapezoidal block, and a drive groove is provided on the inner side of the drive block. The drive shaft extends into the interior of the drive groove.

[0012] A further improvement is that: each of the four corners inside the drill pipe is provided with an installation groove, and each of the four corners outside the inner tube is provided with an installation strip. The installation strip is movably adapted to the installation groove, and the installation strip is provided with reinforcing ribs inside.

[0013] A further improvement is that: the upper end of the inner tube is provided with a fixing cover, and the top of the fixing cover is provided with a connector, which is used to connect to the sampling drill. The fixing cover is sleeved on the top of the drill pipe, and the four corners of the outer side of the fixing cover are provided with a first fixing port, and the four corners of the upper outer side of the drill pipe are provided with a second fixing port. The first fixing port and the second fixing port are fixed together by bolts.

[0014] A further improvement is that: the bottom edge of the drill pipe is provided with drill teeth, the lower end of the inner tube extends to the lower end inside the drill pipe, and the lower end inside the inner tube is provided with a guide arc edge.

[0015] The beneficial effects of this invention are as follows: 1. This invention achieves efficient loosening and unloading of rock strata samples without manual hammering, effectively avoiding damage to the device. After sampling, the rock strata sample remains inside the inner tube. At this time, the eccentric component is activated, which drives the movable plate to slide smoothly along the guide rod inside the frame. The movable plate drives the elastic trapezoidal block to reciprocate inside the side opening. During the reciprocating motion, the elastic trapezoidal block continuously and flexibly compresses the side wall of the sample, creating a gap between the sample and the inner wall of the inner tube, thereby loosening and detaching the sample. The entire unloading process is completed by the automated action of the mechanical structure, replacing the traditional manual hammering method. This avoids the problem of deformation and damage to the drill pipe and inner tube caused by improper hammering force, extends the service life of the device, ensures the stability of the unloading process, prevents secondary breakage of the sample due to violent vibration, and improves the integrity of the sample.

[0016] 2. This invention uses a single power source to drive multiple sets of unloading components to operate synchronously. This is convenient and energy-saving. The unloading action is powered by a single motor, the output of which is connected to a polygonal sleeve. The polygonal sleeve is fitted onto the outside of a polygonal rod, and starting the motor drives the polygonal rod to rotate. The polygonal rod drives the upper sprocket to rotate synchronously. Since multiple sprockets are connected by chains, the rotation of one sprocket can drive all sprockets on the same side to rotate synchronously. The rotation of the sprocket drives the drive wheel to rotate, which in turn drives the drive shaft at the edge to perform a circular motion. The drive shaft slides within the drive groove of the drive block, thereby pushing the movable plate to slide back and forth, achieving the unloading action. This design, through the transmission cooperation of sprockets and chains, requires only one motor to drive all eccentric components within one frame to operate synchronously, eliminating the need for multiple power sources. This significantly simplifies the operation of the device, reduces energy consumption and maintenance costs, ensures the synchronicity of the unloading actions of multiple sets of elastic trapezoidal blocks, and improves unloading efficiency.

[0017] 3. The inner tube and drill pipe of this invention are easy to assemble and disassemble. The elastic inward contraction function of the elastic trapezoidal block avoids interference during the assembly and disassembly process. The inner tube and drill pipe are initially positioned by the sliding fit of the mounting strip and the mounting groove. The upper end of the inner tube is fixed by a fixing cap, which is fitted over the drill pipe. The inner tube and drill pipe are fastened by bolts passing through the first fixing port and the second fixing port. Disassembly only requires unscrewing the bolts to remove the inner tube, making the operation simple and quick. During the installation and disassembly of the inner tube, the outer wall of the inner tube will contact and be squeezed by the elastic trapezoidal block. The elastic trapezoidal block is subjected to... When the pressure is applied, the elastic trapezoidal block contracts inward into the inner cavity, compressing the spring. At this point, the outer surface of the elastic trapezoidal block will not protrude from the inner plane of the side opening, thus not hindering the sliding of the mounting strip along the mounting groove. When the inner tube is fully installed, the elastic restoring force of the spring pushes the elastic trapezoidal block back to its original position, extending it into the side opening without affecting subsequent unloading operations. By utilizing the elastic inward contraction characteristic of the elastic trapezoidal block, the problem of interference between the unloading structure and the assembly / disassembly structure is completely solved, significantly improving the ease of assembly and disassembly of the inner tube, shortening the sampling interval, and improving the overall efficiency of geological exploration. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the structure at point A in the middle; Figure 3 This is a schematic diagram of the material rejection assembly of the present invention; Figure 4 This is a schematic diagram of the internal structure of the present invention; Figure 5 This is a schematic diagram showing the internal structure of the present invention. Figure 6 This is a schematic diagram of the side opening and the elastic trapezoidal block adaptation of the present invention; Figure 7 This is a schematic diagram of the fixing cover of the present invention; Figure 8 This is a schematic diagram of the guide arc edge of the present invention.

[0019] The components are: 1. Inner tube; 2. Drill pipe; 3. Side opening; 4. Embedded groove; 5. Frame; 6. Movable plate; 7. Support bar; 8. Elastic trapezoidal block; 9. Opening; 10. Sprocket; 11. Polygonal rod; 12. Protruding opening; 13. Chain; 14. Guide rod; 15. Drive block; 16. Drive wheel; 17. Drive shaft; 18. Rear cavity; 19. Mounting groove; 20. Mounting strip; 21. Fixing cover; 22. Connector; 23. First fixing port; 24. Second fixing port; 25. Drill teeth; 26. Guide arc edge; 27. Reinforcing rib; 28. Inner cavity; 29. ​​Limiting plate; 30. Spring. Detailed Implementation

[0020] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0021] Example 1 according to Figure 1 , 2 As shown in 3, 4, 5, 6, 7, and 8, this embodiment proposes a rock stratum sampling device for geological exploration, including a drill pipe 2 and an inner pipe 1. The inner pipe 1 is installed inside the drill pipe 2, and side openings 3 are provided on both sides of the inner pipe 1. Multiple sets of side openings 3 are provided. An embedded groove 4 is provided on both sides of the inside of the drill pipe 2, and a material removal component is provided inside the embedded groove 4. The material removal assembly includes a frame 5, a movable plate 6, and a support bar 7. The support bar 7 is fixed to one side inside the inner groove 4. The frame 5 is located on one side of the support bar 7. The movable plate 6 is slidably located inside the frame 5, and the frame 5 has an opening 9. An elastic trapezoidal block 8 is elastically installed on one side of the movable plate 6, and the elastic trapezoidal block 8 extends through the opening 9 into the interior of the side opening 3. The movable plate 6 is driven to slide by an eccentric component. The drill pipe 2 provides a mounting base for the inner tube 1 and the material removal assembly. The inner tube 1 is used to accommodate the rock sample after sampling. The side opening 3 provides a moving channel for the elastic trapezoidal block 8. The inner groove 4 provides a hidden installation space for the material removal assembly, avoiding interference with the rock strata during sampling. The support bar 7 fixes the frame 5, and the frame 5 provides a sliding guide base for the movable plate 6. The eccentric component drives the movable plate 6 to slide back and forth, causing the elastic trapezoidal block 8 to move through the opening 9 and within the side opening 3, realizing sample loosening and unloading, replacing manual knocking, and meeting the requirements of efficient and low-damage unloading.

[0022] At least three sets of the side openings 3 form a unit opening. The frame 5 has multiple sets corresponding to the unit openings. Each set of the frame 5 has at least three sets of elastic trapezoidal blocks 8 on the movable plate 6 inside, and the inner surface of the elastic trapezoidal blocks 8 is on the same plane as the inner surface of the side opening 3. The multiple sets of side openings 3 forming a unit opening, the frame 5 and the elastic trapezoidal blocks 8 are configured accordingly, which can expand the unloading range, so that all areas of the sample can be subjected to the force of the elastic trapezoidal blocks 8, and improve the uniformity of loosening. The elastic trapezoidal blocks 8 are flush with the inner surface of the side openings 3, which can prevent the sample from getting stuck in the gap between the side opening 3 and the elastic trapezoidal blocks 8 during sampling, ensuring that the sample enters the inner tube 1 smoothly, while not affecting the subsequent reciprocating unloading action of the elastic trapezoidal blocks 8.

[0023] The movable plate 6 has an inner cavity 28. One side of the elastic trapezoidal block 8 extends into the inner cavity 28 and is provided with a limiting piece 29. The diameter of the limiting piece 29 is larger than the diameter through which the elastic trapezoidal block 8 penetrates the movable plate 6. A spring 30 connects the limiting piece 29 and one side of the inner cavity 28. The inner cavity 28 provides installation space for the spring 30 and the limiting piece 29. The spring 30 provides elastic extension and contraction force to the elastic trapezoidal block 8, realizing its elastic retraction function. The limiting piece 29 can prevent the elastic trapezoidal block 8 from falling off the movable plate 6 under the restoring force of the spring 30, ensuring the stability of the elastic structure. When the inner tube 1 is installed or removed, the elastic trapezoidal block 8 is squeezed, and the spring 30 compresses it, causing the elastic trapezoidal block 8 to retract into the inner cavity 28, avoiding interference with installation and removal. After installation and removal, the spring 30 returns to its original position, pushing the elastic trapezoidal block 8 to extend to the side opening 3, ensuring normal unloading function.

[0024] Each set of eccentric components within the frame 5 is driven by a sprocket 10. Multiple sets of sprockets 10 are connected by a chain 13 for synchronous rotation. The drill pipe 2 located on the outer side of the support bar 7 has a rear cavity 18, inside which the multiple sets of sprockets 10 and chains 13 are situated. The sprockets 10 and chains 13 work together to achieve synchronous power transmission, enabling multiple sets of eccentric components to operate in conjunction. Only one power source is needed to drive the unloading structures within all frames 5 on one side, achieving energy saving and convenience. The rear cavity 18 provides a closed installation space for the sprockets 10 and chains 13, preventing rock debris from entering the transmission structure during sampling, preventing jamming or wear, ensuring transmission stability, and reducing maintenance costs.

[0025] A polygonal rod 11 is provided at the middle of the outer side of the upper sprocket 10. Both sides of the drill pipe 2 have extension openings 12 at their upper ends. The polygonal rod 11 extends out of the extension openings 12. The polygonal rod 11 is driven by a drive mechanism, which includes a motor and a polygonal sleeve. The polygonal sleeve is connected to the output end of the motor and is adapted to the polygonal rod 11. The extension openings 12 provide an extension channel for the polygonal rod 11, allowing the external drive mechanism to connect with the internal sprocket 10. The motor drives the polygonal rod 11 to rotate through the polygonal sleeve. The polygonal structure prevents slippage during transmission, ensuring stable power transmission to the upper sprocket 10. This, in turn, drives all sprockets 10 to rotate synchronously via the chain 13, enabling a single motor to drive multiple unloading components. This method is simple to operate and saves energy.

[0026] Guide rods 14 are provided at both ends inside the frame 5, and guide grooves are provided at both ends inside the movable plate 6. The movable plate 6 is slidably mounted on the guide rods 14 through the guide grooves. The guide rods 14 cooperate with the guide grooves to provide precise guidance for the reciprocating sliding of the movable plate 6, limit the movement trajectory of the movable plate 6, prevent it from deviating or tilting during sliding, and ensure that the elastic trapezoidal block 8 can move accurately within the side opening 3; at the same time, it improves the smoothness of the sliding of the movable plate 6, reduces the impact of shaking on the unloading action, ensures that the elastic trapezoidal block 8 exerts a uniform force on the sample, and avoids secondary breakage of the sample.

[0027] The eccentric assembly includes a drive block 15, a drive wheel 16, and a drive shaft 17. The drive wheel 16 is rotatably mounted on the inner side of the support bar 7 and is connected to the sprocket 10. The drive shaft 17 is located at one edge of the drive wheel 16. The drive block 15 is located at the middle position of the movable plate 6 away from the elastic trapezoidal block 8, and a drive groove is provided on the inner side of the drive block 15. The drive shaft 17 extends into the interior of the drive groove. The sprocket 10 drives the drive wheel 16 to rotate, and the drive shaft 17 at the edge of the drive wheel 16 performs a circular motion. The drive shaft 17 slides in the drive groove of the drive block 15, converting the rotational motion into a horizontal thrust on the drive block 15, which in turn drives the movable plate 6 to slide back and forth along the guide rod 14. The support bar 7 provides stable support for the drive wheel 16, ensuring smooth operation of the eccentric transmission structure and providing continuous power for the reciprocating unloading action of the elastic trapezoidal block 8, thereby realizing automated sample loosening.

[0028] Example 2 according to Figure 1 , 2 As shown in 3, 4, 5, 6, 7, and 8, this embodiment proposes a rock stratum sampling device for geological exploration, including a drill pipe 2 and an inner pipe 1. The inner pipe 1 is installed inside the drill pipe 2, and side openings 3 are provided on both sides of the inner pipe 1. Multiple sets of side openings 3 are provided. An embedded groove 4 is provided on both sides of the inside of the drill pipe 2, and a material removal component is provided inside the embedded groove 4. The material removal assembly includes a frame 5, a movable plate 6, and a support bar 7. The support bar 7 is fixed to one side inside the inner groove 4. The frame 5 is located on one side of the support bar 7. The movable plate 6 is slidably located inside the frame 5, and the frame 5 has an opening 9. An elastic trapezoidal block 8 is elastically installed on one side of the movable plate 6, and the elastic trapezoidal block 8 extends through the opening 9 into the interior of the side opening 3. The movable plate 6 is driven to slide by an eccentric component. The drill pipe 2 provides a mounting base for the inner tube 1 and the material removal assembly. The inner tube 1 is used to accommodate the rock sample after sampling. The side opening 3 provides a moving channel for the elastic trapezoidal block 8. The inner groove 4 provides a hidden installation space for the material removal assembly, avoiding interference with the rock strata during sampling. The support bar 7 fixes the frame 5, and the frame 5 provides a sliding guide base for the movable plate 6. The eccentric component drives the movable plate 6 to slide back and forth, causing the elastic trapezoidal block 8 to move through the opening 9 and within the side opening 3, realizing sample loosening and unloading, replacing manual knocking, and meeting the requirements of efficient and low-damage unloading.

[0029] The drill pipe 2 has mounting grooves 19 at each of its four corners, and the inner tube 1 has mounting strips 20 at each of its four corners. The mounting strips 20 are movably fitted with the mounting grooves 19, and the mounting strips 20 have reinforcing ribs 27 inside. The movable fit between the mounting strips 20 and the mounting grooves 19 provides quick positioning guidance for the inner tube 1 and the drill pipe 2, facilitating the precise insertion and removal of the inner tube 1 from the drill pipe 2, and improving the ease of installation and disassembly. The reinforcing ribs 27 enhance the structural strength of the mounting strips 20, preventing deformation of the mounting strips 20 during installation, disassembly, or sampling of the inner tube 1, ensuring the stability of the fit between the inner tube 1 and the drill pipe 2, and improving the overall load-bearing capacity of the inner tube 1, preventing damage to the inner tube 1 due to sample gravity.

[0030] The upper end of the inner tube 1 is provided with a fixing cover 21, and the top of the fixing cover 21 is provided with a connector 22. The connector 22 is used to connect to the sampling drill. The fixing cover 21 is sleeved on the top of the drill tube 2, and each of the four corners of the outer side of the fixing cover 21 is provided with a first fixing port 23. Each of the four corners of the upper outer side of the drill tube 2 is provided with a second fixing port 24. The first fixing port 23 and the second fixing port 24 are fixed together by bolts. The fixing cover 21 is fastened to the drill tube 2 by bolts passing through the first fixing port 23 and the second fixing port 24, preventing the inner tube 1 from loosening or shifting during sampling. The connector 22 is used to connect to the sampling drill, transmitting the rotational power and drilling thrust of the drill, driving the drill tube 2 and the inner tube 1 to drill and sample synchronously. During assembly and disassembly, only the bolts need to be unscrewed to remove the fixing cover 21 and the inner tube 1, which is convenient to operate. With the elastic inward shrinkage function of the elastic trapezoidal block 8, interference between the unloading structure and assembly and disassembly is completely avoided.

[0031] The bottom edge of the drill pipe 2 is provided with drill teeth 25, and the lower end of the inner tube 1 extends to the lower end of the drill pipe 2. The lower end of the inner tube 1 is provided with a guide arc edge 26. The drill teeth 25 rotate with the drill pipe 2, breaking up the rock strata to form a core sample, providing a basis for sampling; the lower end of the inner tube 1 extends to the lower end of the drill pipe 2, which can promptly receive the broken sample and prevent the sample from scattering; the guide arc edge 26 can guide the sample smoothly into the inner tube 1, reducing the resistance when the sample enters, and at the same time preventing the sample from getting stuck or accumulating at the lower end of the inner tube, ensuring the integrity of the sampling and providing a good foundation for subsequent unloading.

[0032] This device operates around the core process of "efficient sampling - automated unloading - convenient assembly and disassembly". During sampling, the sampling drill is connected to the connector 22 of the fixed cover 21. The drill provides rotational power and drilling thrust, driving the drill pipe 2 to rotate synchronously. The drill teeth 25 at the bottom of the drill pipe 2 break the rock layer. The broken rock core sample, under the action of thrust and pressure, smoothly enters the inner tube 1 through the guide arc edge 26 at the lower end of the inner tube 1 to complete the sampling. After sampling, the device is lifted out of the ground, the connecting bolts between the fixed cover 21 and the drill pipe 2 are removed, and the inner tube 1 can be easily pulled out along the mounting groove 19 by utilizing the elastic inward retraction function of the elastic trapezoidal block 8, or the unloading mechanism can be directly started: the motor passes through multiple The polygonal sleeve drives the polygonal rod 11 to rotate, which in turn drives the upper sprocket 10 to rotate. Power is transmitted through the chain 13, causing multiple sprockets 10 to operate synchronously. The sprockets 10 drive the drive wheel 16 to rotate, and the drive shaft 17 on the edge of the drive wheel 16 slides in the drive groove of the drive block 15, pushing the movable plate 6 to slide back and forth along the guide rod 14. The movable plate 6 drives the elastic trapezoidal block 8 to move back and forth in the side opening 3, flexibly loosening the sample in the inner tube 1 to achieve automatic unloading. After unloading, the inner tube 1 is fitted into the drill tube 2 through the mounting strip 20 and the mounting groove 19. The elastic trapezoidal block 8 is compressed and retracted, then reset, and is then tightened by the fixing cover 21, allowing the next round of sampling to begin. The entire process relies on a single motor to drive multiple sets of components in linkage, eliminating the need for manual hammering, ensuring interference-free assembly and disassembly, and balancing sampling efficiency, sample integrity, and device lifespan.

[0033] Verification data: To verify the performance of the device, three typical rock strata—sandstone, shale, and limestone—were selected, and comparative tests were conducted within a sampling depth range of 5-20m. The verification results are as follows: ① Unloading performance: Using this device for unloading, the average unloading time for samples from the three rock strata was 1.2-1.8 minutes, which is more than 60% more efficient than manual hammering (average 4.5-6.0 minutes). The sample breakage rate after unloading was less than 3%, while the breakage rate for manual hammering reached 15-22%. There was no deformation of drill pipe 2 or inner tube 1. After 500 consecutive uses, the wear of components such as elastic trapezoidal block 8 and drive wheel 16 was less than 0.2mm. ② Energy consumption and operation: A single motor (power 0.75kW) drives one side of the unloading mechanism, and the energy consumption for a single unloading is only 0.015-0.022kW・h, which is more than 50% lower than that of a multi-motor drive device (energy consumption of 0.04-0.06kW・h per unloading). The single motor drive can realize the synchronous unloading of multiple frames, reducing the operation steps by 40% and eliminating the need for professional personnel to control it. ③ Assembly and disassembly performance: The average assembly and disassembly time of the inner tube 1 is 1.5-2.0 minutes, which is more than 50% faster than the traditional interference-type structure device (average 4.0-5.5 minutes). After 200 assembly and disassembly cycles, the mounting strip 20 showed no deformation, and the reinforcing rib 27 increased the load-bearing strength of the mounting strip 20 by 30%. The inner tube 1 can withstand a maximum sample weight of 80 kg without damage or bending. After 1000 cycles of extension and resetting, the elastic trapezoidal block 8 showed less than 5% elastic decay of the spring 30, and the limiting plate 29 remained stable. The flatness deviation between the elastic trapezoidal block 8 and the side opening 3 was always controlled within 0.1 mm, without affecting the sampling and unloading effect. The above data show that this device is superior to traditional devices in terms of unloading efficiency, energy saving, ease of assembly and disassembly, and structural stability, and can meet the batch sampling needs of various geological exploration scenarios.

[0034] This geological exploration rock stratum sampling device achieves efficient loosening and unloading of rock stratum samples without manual hammering, effectively avoiding damage to the device. After sampling, the rock stratum sample remains inside the inner tube 1. At this time, the eccentric component is activated, which drives the movable plate 6 to slide smoothly along the guide rod 14 inside the frame 5. The movable plate 6 drives the elastic trapezoidal block 8 to reciprocate inside the side opening 3. During the reciprocating motion, the elastic trapezoidal block 8 continuously and flexibly compresses the side wall of the sample, creating a gap between the sample and the inner wall of the inner tube 1, thereby loosening and releasing the sample. The entire unloading process is completed by the automated action of the mechanical structure, replacing the traditional manual hammering method. This avoids the deformation and damage to the drill pipe 2 and inner tube 1 caused by improper hammering force, extends the service life of the device, ensures the stability of the unloading process, prevents secondary breakage of the sample due to violent vibration, and improves the integrity of the sample. Furthermore, a single power source drives multiple unloading components to operate synchronously, which is convenient and energy-saving. The unloading action is powered by a single motor, the output end of which is connected to a polygonal sleeve. The polygonal sleeve is fitted onto the outside of the polygonal rod 11, and starting the motor drives the polygonal rod 11 to rotate. The polygonal rod 11 drives the upper sprocket 10 to rotate synchronously. Since multiple sprockets 10 are connected by a chain 13, the rotation of one sprocket 10 can drive all sprockets 10 on the same side to rotate synchronously. When the sprocket 10 rotates, it drives the drive wheel 16 to rotate. The drive wheel 16 drives the drive shaft 17 at the edge to perform a circular motion. The drive shaft 17 slides in the drive groove of the drive block 15, thereby pushing the movable plate 6 to slide back and forth to realize the unloading action. This design, through the transmission cooperation of the sprocket 10 and the chain 13, only requires one motor to drive all eccentric components in the frame 5 on one side to operate synchronously, without the need for multiple power sources. This greatly simplifies the operation process of the device, reduces the energy consumption and maintenance costs of the equipment, ensures the synchronicity of the unloading action of multiple sets of elastic trapezoidal blocks 8, and improves the unloading efficiency.Meanwhile, the inner tube 1 and the drill pipe 2 are easy to assemble and disassemble. The elastic inward shrinkage function of the elastic trapezoidal block 8 avoids interference during the assembly and disassembly process. The inner tube 1 and the drill pipe 2 are initially positioned by the sliding fit between the mounting strip 20 and the mounting groove 19. The upper end of the inner tube 1 is fixed by the fixing cover 21, which is sleeved on the top of the drill pipe 2. The inner tube 1 and the drill pipe 2 are fastened by bolts passing through the first fixing port 23 and the second fixing port 24. During disassembly, the inner tube 1 can be removed simply by unscrewing the bolts, making the operation simple and quick. During the installation and disassembly of the inner tube 1, the outer wall of the inner tube 1 will come into contact with and be squeezed by the elastic trapezoidal block 8. When block 8 is subjected to compressive force, it contracts into the inner cavity 28, and spring 30 is compressed. At this time, the outer side of the elastic trapezoidal block 8 will not protrude from the inner plane of the side opening 3, and will not obstruct the sliding of the mounting strip 20 along the mounting groove 19. When the inner tube 1 is fully installed, the elastic restoring force of spring 30 pushes the elastic trapezoidal block 8 to return to its original position, so that it extends into the side opening 3, without affecting the subsequent unloading operation. By utilizing the elastic inward contraction characteristic of the elastic trapezoidal block 8, the problem of mutual interference between the unloading structure and the assembly and disassembly structure is completely solved, significantly improving the ease of assembly and disassembly of the inner tube 1, shortening the sampling interval time, and improving the overall geological exploration efficiency.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rock strata sampling device for geological exploration, comprising a drill pipe (2) and an inner tube (1), characterized in that: The inner tube (1) is installed inside the drill pipe (2), and the inner tube (1) has side openings (3) on both sides. The side openings (3) are provided in multiple sets. The drill pipe (2) has an inner groove (4) on both sides, and the inner groove (4) has a material removal component inside. The material rejection assembly includes a frame (5), a movable plate (6), and a support strip (7). The support strip (7) is fixed to one side inside the embedded groove (4). The frame (5) is located on one side of the support strip (7). The movable plate (6) is slidably located inside the frame (5), and the frame (5) has an opening (9). An elastic trapezoidal block (8) is elastically installed on one side of the movable plate (6), and the elastic trapezoidal block (8) extends through the opening (9) to the inside of the side opening (3). The movable plate (6) is driven to slide by an eccentric component.

2. The rock strata sampling device for geological exploration according to claim 1, characterized in that: At least three sets of the side openings (3) form a unit opening. The frame (5) is provided with multiple sets of the unit openings. At least three sets of the elastic trapezoidal blocks (8) are provided on the movable plate (6) inside each set of the frame (5), and the inner side of the elastic trapezoidal block (8) and the inner side of the side opening (3) are located on the same plane.

3. The rock strata sampling device for geological exploration according to claim 2, characterized in that: The movable plate (6) has an inner cavity (28) inside. One side of the elastic trapezoidal block (8) extends into the inner cavity (28) and is provided with a limiting piece (29). The diameter of the limiting piece (29) is larger than the diameter through which the elastic trapezoidal block (8) passes through the movable plate (6). A spring (30) is connected between the limiting piece (29) and one side inside the inner cavity (28).

4. A rock strata sampling device for geological exploration according to claim 3, characterized in that: Each set of eccentric components in the frame (5) is driven by a sprocket (10). Multiple sets of sprockets (10) are connected by a chain (13) to rotate synchronously. The drill pipe (2) at the outer position of the support bar (7) is provided with a rear cavity (18). Multiple sets of sprockets (10) and chains (13) are located inside the rear cavity (18).

5. A rock strata sampling device for geological exploration according to claim 4, characterized in that: The upper sprocket (10) has a polygonal rod (11) at the middle of its outer side. Both sides of the drill pipe (2) have protrusions (12) at their upper ends. The polygonal rod (11) extends out of the protrusions (12). The polygonal rod (11) is driven by a drive mechanism, which includes a motor and a polygonal sleeve. The polygonal sleeve is connected to the output end of the motor and is adapted to the polygonal rod (11).

6. A rock strata sampling device for geological exploration according to claim 5, characterized in that: The frame (5) has guide rods (14) at both ends, and the movable plate (6) has guide grooves at both ends. The movable plate (6) is slidably mounted on the guide rods (14) through the guide grooves.

7. A rock strata sampling device for geological exploration according to claim 6, characterized in that: The eccentric assembly includes a drive block (15), a drive wheel (16), and a drive shaft (17). The drive wheel (16) is rotatably mounted on the inner side of the support bar (7) and is connected to the sprocket (10). The drive shaft (17) is located at the edge of one side of the drive wheel (16). The drive block (15) is located at the middle position of the movable plate (6) away from the elastic trapezoidal block (8), and the drive block (15) has a drive groove on its inner side. The drive shaft (17) extends into the interior of the drive groove.

8. A rock strata sampling device for geological exploration according to claim 1, characterized in that: The drill pipe (2) has four corners with mounting grooves (19) and the inner tube (1) has four corners with mounting strips (20). The mounting strips (20) are adapted to the mounting grooves (19) and the mounting strips (20) have reinforcing ribs (27) inside.

9. A rock strata sampling device for geological exploration according to claim 1, characterized in that: The upper end of the inner tube (1) is provided with a fixing cover (21), and the top of the fixing cover (21) is provided with a connector (22). The connector (22) is used to connect the sampling drill. The fixing cover (21) is sleeved on the top of the drill pipe (2), and the four corners of the outer side of the fixing cover (21) are provided with a first fixing port (23). The four corners of the upper side of the drill pipe (2) are provided with a second fixing port (24). The first fixing port (23) and the second fixing port (24) are fixed together by bolts.

10. A rock strata sampling device for geological exploration according to claim 1, characterized in that: The bottom edge of the drill pipe (2) is provided with drill teeth (25), the lower end of the inner tube (1) extends to the lower end inside the drill pipe (2), and the lower end inside the inner tube (1) is provided with a guide arc edge (26).

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