Geological exploration sampling device

Abstract

This application provides a geological exploration sampling device. After the device is started, the drive assembly drives the core tube drilling section to rotate into the target soil layer. Upon reaching the predetermined depth, the drive stops, and the core tube, along with the fixed support, is pulled out as a whole, allowing the closed sampling chamber and soil sample column to be completely removed. The core tube is placed on a horizontal worktable, and the end of the arc-shaped shell away from the fixed part is released, with the tail of the arc-shaped shell moving away from the drilling section, exposing the previously covered open slot and connecting the sampling chamber to the outside. In the open state, the side of the sample column is exposed, allowing it to be completely removed from the side through the sampling chamber, avoiding sample displacement caused by compression during removal. The side-opening sampling chamber avoids continuous compression of the sample by the tube wall when pushing from the bottom, maintaining the original diameter and stratification of the sample column and preserving the original soil structure to the maximum extent. The side-removal method eliminates vertical movement of the sample due to friction or uneven force during the push rod removal process, ensuring accurate correspondence between the sampling depth mark and the stratum.

Description

Technical Field

[0001] This application relates to the field of geological exploration, and more particularly to a geological exploration sampling device. Background Technology

[0002] There are various methods of geological exploration, such as geological mapping, geophysical surveying, geochemical exploration, and drilling. Drilling involves drilling through a pre-defined network of boreholes to extract soil layers or rock cuttings, allowing direct observation of the subsurface soil's stratification, structure, and mineralization characteristics. During drilling sampling, tube sampling is often used. A tube sampler is an open metal cylinder (commonly called a "sample tube") that is pushed into the soil layer to bring the entire soil mass into the tube, preserving the soil's stratification structure, hydraulic state, and stress state, while minimizing disturbance.

[0003] After sampling, loosen the upper clamp of the tubular sampler and carefully pull out the sampler. On a horizontal table, use the push rod to slowly push the sample column out from the end of the tube. Cut or peel the tube wall evenly in the longitudinal direction, check the integrity of the sample column, seal both ends, mark the depth and sampling direction, and put it into a sample bag or sample box. Let it stand for several hours to allow the moisture to return to equilibrium before taking measurements.

[0004] During the process of removing the sample column from the sampler, a push rod is used to push the sample column, which causes the unit area of ​​the sample column to be compressed. This results in compression of the sample column in the vertical direction, causing some soil layers to clump together due to the compression force during subsequent analysis, resulting in errors in the test results and making it difficult to conduct subsequent soil layer analysis. Utility Model Content

[0005] In view of this, it is necessary to provide a geological exploration sampling device to solve the above problems.

[0006] An embodiment of this application provides a geological exploration sampling device, comprising:

[0007] The core tube has a fixing part and a drilling part. An open groove is formed on the peripheral wall of the drilling part, and the open groove extends to the end of the drilling part away from the fixing part.

[0008] An arc-shaped shell is rotatably connected at one end to the end of the drilling part near the fixed part, and the other end is detachably connected to the core tube. The arc-shaped shell is located in the open groove.

[0009] A fixed bracket, wherein the fixing part is mounted on the fixed bracket;

[0010] A drive assembly is mounted on the fixed bracket and rotatably connected to the fixed part;

[0011] During drilling, the arc-shaped shell is installed on the drilling part and together with the drilling part, they form a cylindrical sampling cavity; during sampling, the end of the arc-shaped shell away from the fixed part is released so that the sampling cavity can communicate with the outside through the open slot.

[0012] In at least one embodiment of this application, the core sampling tube comprises:

[0013] A semicircular plate is rotatably connected at one end to one end of the arc-shaped shell, and detachably connected at the other end to the arc-shaped shell. The semicircular plate is located on the drilling part, and the semicircular plate and the arc-shaped shell surround to form the sampling cavity.

[0014] In at least one embodiment of this application, a first rotating groove is provided at the end of the semicircular plate away from the fixed part;

[0015] The arc-shaped shell has a second rotating groove at one end away from the fixed part. The arc-shaped shell is fixed to the semi-circular plate so that the first rotating groove and the second rotating groove surround each other to form a rotating groove.

[0016] The locking element is rotatably connected to the arc-shaped shell and located within the second rotating groove;

[0017] The locking member is rotated to extend into / disengage from the second rotating groove and engage or disengage from the semicircular plate.

[0018] In at least one embodiment of this application, the semicircular plate is provided with a locking block, the locking member is provided with a locking groove, and the locking member can engage or disengage with the locking block to fix the arc-shaped shell or release the arc-shaped shell.

[0019] In at least one embodiment of this application, a rotating block is provided at one end of the arc-shaped shell;

[0020] The drilling section has a movable groove, and the drilling section and / or the fixed section has a clearance groove. The clearance groove and the movable groove are located at the junction of the drilling section and the fixed section. The rotating block is received in the movable groove and is rotatably connected to the movable groove.

[0021] In at least one embodiment of this application, the peripheral surface of the fixing part is provided with an exhaust hole, which is connected to the sampling chamber.

[0022] In at least one embodiment of this application, the fixing bracket includes:

[0023] A fixing plate is provided with a mounting position, through which the core sampling tube passes;

[0024] Multiple fixed telescopic rods, one end of which is rotatably connected to the fixed plate, and the other end is provided with a fixing nail.

[0025] In at least one embodiment of this application, the driving component includes:

[0026] The first drive motor has one end fixed to the end of the fixed plate away from the fixed telescopic rod, and the other end is provided with a screw.

[0027] The drive plate has a transmission hole, the screw passes through the transmission hole and is connected to the drive plate in a transmission manner, and one end of the fixing part is fixed to the drive plate.

[0028] In at least one embodiment of this application, the driving component further includes:

[0029] The mounting plate has a first hole, and one end of the screw is rotatably connected to the first hole;

[0030] The guide rod is fixed at one end to the mounting plate and at the other end to the fixing plate.

[0031] In at least one embodiment of this application, the fixing plate is provided with a guide groove, the guide groove is located on the mounting position, and the guide groove has an opening, the opening is opened along a first direction, and the arc-shaped shell can be unfolded or fixed relative to the core tube along the first direction so that the sampling chamber is opened or closed.

[0032] The geological exploration sampling device implemented in this embodiment will have at least the following beneficial effects:

[0033] The geological exploration sampling device described above rotates an arc-shaped shell, fixing one end of the shell away from the fixed part to the drilling part, forming a sampling chamber with the drilling part. After the geological exploration sampling device is started, the drive component drives the core tube drilling part to rotate into the target soil layer.

[0034] Once the predetermined depth is reached, the drive is stopped, and the core tube, along with the fixed support, is pulled out as a whole, allowing the sealed sampling chamber and soil sample column to be completely removed from the soil.

[0035] Place the coring tube on a horizontal workbench, release the end of the arc-shaped shell away from the fixed part, and move the tail of the arc-shaped shell away from the drilling part, so that the previously covered open groove is exposed again, allowing the sampling chamber to communicate with the outside.

[0036] When the sample column is in the open state, its side is exposed, allowing it to be completely removed from the side through the sampling chamber, thus avoiding sample displacement caused by compression during removal.

[0037] The side-opening sampling chamber avoids continuous compression of the sample by the tube wall when pushing from the bottom of the tube, and the sample column maintains its original diameter and stratification, preserving the original state of the soil to the greatest extent.

[0038] The side-mounted sample column extraction method eliminates the vertical movement of the sample caused by friction or uneven force during the push rod ejection process, ensuring accurate correspondence between the sampling depth mark and the layer. Attached Figure Description

[0039] Figure 1 This is a structural diagram of a geological exploration sampling device;

[0040] Figure 2 An exploded view of a geological exploration sampling device;

[0041] Figure 3 This is a structural diagram of the core sampling tube;

[0042] Figure 4 Here is a structural diagram of the locking component;

[0043] Figure 5 This is a structural diagram of an arc-shaped shell;

[0044] Figure 6 This is a reference diagram showing the operational status of a geological exploration sampling device.

[0045] Explanation of main component symbols

[0046] 100. Geological exploration sampling equipment;

[0047] 110. Core tube; 111. Fixing part; 112. Drilling part; 112a. Open groove; 113. Semicircular plate; 110a. Sampling chamber; 113a. First rotating groove; 1131. Locking block; 112b. Movable groove; 112c. Clearance groove; 111a. Vent hole;

[0048] 120. Arc-shaped shell; 120a. Second rotating groove; 121. Rotating block;

[0049] 130. Fixed bracket; 131. Fixed plate; 132. Fixed telescopic rod; 133. Fixed nail; 131a. Guide groove; A. First direction;

[0050] 140. Drive assembly; 141. First drive motor; 142. Screw; 143. Drive plate; 143a. Transmission hole; 144. Mounting plate; 144a. First hole; 145. Guide rod;

[0051] 150, locking element; 150a, slot. Detailed Implementation

[0052] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0053] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0054] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0055] An embodiment of this application provides a geological exploration sampling device 100, comprising:

[0056] The core tube 110 has a fixing part 111 and a drilling part 112. The peripheral wall of the drilling part 112 is provided with an open groove 112a, which extends to the end of the drilling part 112 away from the fixing part 111.

[0057] An arc-shaped shell 120 is rotatably connected at one end to the end of the drilling part 112 near the fixed part 111, and the other end is detachably connected to the core tube 110. The arc-shaped shell 120 is located in the open groove 112a.

[0058] A fixed bracket 130 is provided, and the fixing part 111 is mounted on the fixed bracket 130.

[0059] The drive assembly 140 is mounted on the fixed bracket 130 and is rotatably connected to the fixed part 111;

[0060] During drilling, the arc-shaped shell 120 is installed on the drilling part 112 and together with the drilling part 112, they form a cylindrical sampling cavity 110a. During sampling, the end of the arc-shaped shell 120 away from the fixed part 111 is released so that the sampling cavity 110a can communicate with the outside through the open groove 112a.

[0061] Please refer to Figures 1-6 In one embodiment, the arc-shaped shell 120 is rotated so that one end of the arc-shaped shell 120 away from the fixing part 111 is fixed to the drilling part 112, forming a sampling chamber 110a with the drilling part 112. After the geological exploration sampling device 100 is started, the drive component 140 drives the core tube 110 and the drilling part 112 to rotate into the target soil layer.

[0062] Once the predetermined depth is reached, the drive is stopped, and the core tube 110 is pulled out together with the fixed support 130, so that the closed sampling chamber 110a and the soil sample column are completely removed from the soil.

[0063] Place the core tube 110 on a horizontal workbench, release one end of the arc-shaped shell 120 away from the fixed part 111, and move the tail of the arc-shaped shell 120 away from the drilling part 112, so that the previously covered open groove 112a is exposed again, and the sampling chamber 110a is connected to the outside.

[0064] When the sample column is in the open state, the side of the sample column is exposed, and the sample column can be completely removed from the side through the sampling cavity 110a, avoiding the problem of sample displacement caused by compression of the sample column during the removal process.

[0065] The side-opening sampling chamber 110a avoids continuous compression of the sample by the pipe wall when pushing from the bottom of the pipe, and the sample column maintains its original diameter and stratification, preserving the original state of the soil to the greatest extent.

[0066] The side-mounted sampling method eliminates the vertical movement of the sample caused by friction or uneven force during the push rod ejection process, ensuring accurate correspondence between the sampling depth mark and the stratum. The obtained soil samples, which are uncompressed and free from displacement, more accurately reflect the stratum structure and hydraulic-stress state, providing high-quality samples for subsequent geotechnical tests and soil layer analysis.

[0067] It should be noted that the fixing part 111 is roughly a round tube, the drilling part 112 is roughly a semi-circular arc plate, and the arc shell 120 is roughly a semi-circular arc plate, which can be joined with the drilling part 112 to form a round tube.

[0068] In at least one embodiment of this application, the core sampling tube 110 comprises:

[0069] A semicircular plate 113 is rotatably connected at one end to one end of the arc-shaped shell 120, and detachably connected at the other end to the arc-shaped shell 120. The semicircular plate 113 is located on the drilling section 112, and the semicircular plate 113 and the arc-shaped shell 120 surround each other to form the sampling cavity 110a.

[0070] Please refer to Figures 1-6 In one embodiment, during the device assembly stage, one end of the arc-shaped shell 120 is hinged to one end of the drilling part 112 via a pivot, while the other end is detachably fixed to the drilling part 112 via a locking or quick-release mechanism. This ensures that the semi-circular plate 113 fits tightly with the arc-shaped shell 120 in the working state, while also facilitating subsequent opening.

[0071] Before drilling, the operator first rotates the arc-shaped shell 120 to the position where it aligns with the semi-circular plate 113, then inserts and locks its detachable end, so that the semi-circular plate 113 and the arc-shaped shell 120 surround the side wall of the drilling section 112, precisely forming a sealed cylindrical sampling chamber 110a, while completely covering the open groove 112a on the side wall.

[0072] The drive assembly 140 is activated, causing the sampling chamber 110a, which together with the semicircular plate 113 and the arc-shaped shell 120, to rotate into the soil layer. Due to the sealed structure formed by the semicircular plate 113 and the arc-shaped shell 120, even in complex strata with a high risk of mud or debris intrusion, external impurities can be effectively blocked, ensuring the purity of the soil inside the chamber.

[0073] Once the target depth is reached, the drive is stopped, and the core tube 110 is pulled out together with the fixed support 130, and the sample column in the sampling chamber 110a is completely removed from the soil.

[0074] Lay the core tube 110 flat, first loosen the arc-shaped shell 120, then rotate the arc-shaped shell 120 out along the pivot, separating it from the semi-circular plate 113. The open groove 112a on the side wall of the sampling chamber 110a is instantly exposed, realizing the connection between the chamber and the outside world.

[0075] After the semicircular plate 113 and the arc-shaped shell 120 are separated, the operator can directly peel off the soil sample column completely from the side through the open groove 112a without having to push it out from the end of the tube, thus avoiding compression and misalignment of the sample column.

[0076] The semi-circular plate 113 and the arc-shaped shell 120 are connected by a rotatable and detachable dual connection, achieving dual flexibility in closing and opening. Before drilling, simply rotate and insert; after drilling, simply loosen the locking position and rotate to quickly open the sampling chamber 110a, making the operation simple and efficient.

[0077] When the semi-circular plate 113 is tightly fitted with the arc-shaped shell 120, it can completely seal the open groove 112a on the side wall of the drilling section 112, blocking the intrusion of external media such as mud and debris, and ensuring that the soil sample in the sampling chamber 110a is not contaminated; when opened, it is only partially opened on the side, minimizing the pressure and disturbance on the sample column.

[0078] In at least one embodiment of this application, a first rotating groove 113a is provided at the end of the semicircular plate 113 away from the fixed part 111;

[0079] The arc-shaped shell 120 is provided with a second rotating groove 120a at one end away from the fixed part 111. The arc-shaped shell 120 is fixed to the semi-circular plate 113 so that the first rotating groove 113a and the second rotating groove 120a surround each other to form a rotating groove.

[0080] The locking element 150 is rotatably connected to the arc-shaped shell 120 and is located within the second rotating groove 120a;

[0081] The locking member 150 is rotated so that it extends into / out of the second rotating groove 120a and engages or disengages from the semicircular plate 113.

[0082] Please refer to Figures 1-6 In one embodiment, a first rotating groove 113a is formed at the end of the semicircular plate 113 away from the fixing part 111; a second rotating groove 120a is also formed at the corresponding position of the arc-shaped shell 120 in the same direction. During installation, the arc-shaped shell 120 is fitted onto the outside of the semicircular plate 113, so that the first rotating groove 113a and the second rotating groove 120a are connected end to end in space, forming a complete circular channel—the rotating groove.

[0083] The locking member 150 is hinged to the arc-shaped shell 120 by a pin, and its main body rotates into the second rotating groove 120a, where it is in a rotatable state. At this time, the rotating groove is both the guide rail of the locking member 150 and the channel for its unfolding and retraction.

[0084] Before drilling, the operator rotates the locking member 150 so that it extends into the deepest part of the second rotating groove 120a and engages with the corresponding engaging block 1131 on the semicircular plate 113. At this time, the locking member 150 is constrained by the rotating groove, the arc-shaped shell 120 is firmly attached to the semicircular plate 113, the rotating groove is completely closed, and the semicircular plate 113 and the arc-shaped shell 120 work together to form a sealed cylindrical sampling chamber 110a.

[0085] After drilling and extraction, the device is placed on a horizontal platform, and the locking member 150 is rotated in the reverse direction to disengage it from the second rotating groove 120a. Guided by the rotating groove and the arc-shaped shell 120, the tail of the arc-shaped shell 120 automatically moves away from the side of the semicircular plate 113 along the groove opening, opening the rotating groove. At this time, the semicircular plate 113 separates from the arc-shaped shell 120, and the open groove 112a on the side wall of the sampling chamber 110a is exposed, allowing the soil sample to be taken out from the side.

[0086] The rotating groove and locking element 150 do not require additional springs or extra snap rings; opening and closing can be completed simply by rotating within the groove, reducing the number of parts and simplifying assembly and maintenance.

[0087] The rotating groove provides precise guidance for the locking element 150, which is inserted smoothly when screwed in and slides out of the groove when disengaged. In the locked state, the locking element 150 is bidirectionally constrained by the groove wall, achieving self-locking and is not easily loosened due to vibration.

[0088] By simply rotating a locking element by 150 degrees, you can switch between closed and open working modes without disassembling any major components, significantly improving on-site opening and closing efficiency.

[0089] During the drilling phase, the tight engagement between the rotating groove and the locking element 150 ensures that the sampling chamber 110a is fully sealed; during the opening phase, the smooth sliding guided by the groove avoids impact or compression on the soil sample, preserving the original state of the soil sample to the greatest extent and improving the accuracy of subsequent analysis.

[0090] It should be noted that the first rotating groove 113a is approximately a semi-circular groove, the second rotating groove 120a is approximately a semi-circular groove, and the rotating groove is a circular groove; the locking member 150 is approximately a semi-circular block, and a hook-shaped protrusion is provided on one side, and an inclined concave groove 150a is formed between the protrusion and the semi-circular block.

[0091] It should be further explained that the locking member 150 is equipped with a locking screw. When the locking member 150 is engaged with the drilling part 112, it is locked with the arc-shaped shell 120 by the locking screw, so as to further fix the locking member 150 on the arc-shaped shell 120, so as to ensure that the arc-shaped shell 120 will not fall off during the drilling and extraction process of the core tube 110.

[0092] In at least one embodiment of this application, the semicircular plate 113 is provided with a locking block 1131, and the locking member 150 is provided with a locking groove 150a. The locking member 150 can engage or disengage with the locking block 1131 to fix the arc-shaped shell 120 or release the arc-shaped shell 120.

[0093] Please refer to Figures 1-6 In one embodiment, before the device is assembled or drilled, a locking block 1131 (boss) is pre-installed on the semi-circular plate 113, and a corresponding slot 150a (groove) is provided on the locking member 150 on the arc-shaped shell 120.

[0094] The operator closes the arc-shaped shell 120, making it fit with the semi-circular plate 113 to form a complete cylindrical sampling cavity 110a.

[0095] Rotate the locking member 150 so that its slot 150a aligns with and fits into the locking block 1131 of the semicircular plate 113. At this time, the slot 150a and the locking block 1131 engage and lock together, and the arc-shaped shell 120 is locked on the outside of the semicircular plate 113. The open slot 112a on the side wall is completely covered, and the sampling chamber 110a is in a closed state.

[0096] It should be noted that after locking, the projected area of ​​locking block 1131 completely covers locking block 1131 in the axial direction of core tube 110 to prevent locking block 1131 from falling off.

[0097] The drive assembly 140 is activated, which drives the entire core tube 110 (including the semi-circular plate 113 and the arc-shaped shell 120 that is locked in place) to rotate into the soil layer and reach the predetermined depth. Then, together with the fixed bracket 130, the whole tube is pulled out, so that the soil sample column in the sealed sampling chamber 110a is completely removed from the soil.

[0098] Place the core tube 110 on a horizontal worktable and rotate the locking member 150 in the opposite direction to disengage the slot 150a from the locking block 1131.

[0099] After disengaging from the locking mechanism, the arc-shaped shell 120 can be freely unfolded along the movable connection, the open slot 112a is exposed again, and the sampling chamber 110a is connected to the outside.

[0100] With the arc-shaped shell 120 unfolded, the open groove 112a on the side wall exposes the side of the soil sample column, allowing the operator to completely peel off the sample directly from the side without having to push it from the bottom.

[0101] After the locking block 1131 engages with the slot 150a, a self-locking structure is formed. Even during drilling under high vibration or mud flow impact, the arc-shaped shell 120 will not come loose unexpectedly, ensuring that the sampling chamber 110a is completely sealed and preventing the medium inside and outside the sampling chamber from seeping into each other.

[0102] Engaging and disengaging can be accomplished by rotation or a single pulling and pushing action, without the need for additional tools or complex mechanisms. On-site personnel can close and open the sampling chamber 110a in a few seconds, improving operational efficiency.

[0103] Because the locking structure enables a strict sealing-opening switching, the sample is completely isolated from the outside world during the drilling stage; during the opening stage, it unfolds smoothly without impact. Combined with side stripping sampling, it preserves the soil bedding, moisture and stress state to the maximum extent, improving the accuracy of subsequent test and analysis data.

[0104] In at least one embodiment of this application, a rotating block 121 is provided at one end of the arc-shaped shell 120;

[0105] The drilling section 112 is provided with a movable groove 112b, and the drilling section 112 and / or the fixed section 111 are provided with a clearance groove 112c. The clearance groove 112c and the movable groove 112b are located at the junction of the drilling section 112 and the fixed section 111. The rotating block 121 is received in the movable groove 112b and is rotatably connected to the movable groove 112b.

[0106] Please refer to Figures 1-6 In one embodiment, a rotating block 121 is cast or assembled at one end of the arc-shaped shell 120 near the fixed part 111. A circular movable groove 112b is provided circumferentially on the side wall of the drilling part 112 (or at the junction with the fixed part 111) to accommodate and guide the rotating block 121. An avoidance groove 112c is also reserved on the drilling part 112 or the fixed part 111 at the same junction to ensure that the rotating block 121 is not interfered with by adjacent structures when sliding and rotating.

[0107] Before drilling, the operator presses the arc-shaped shell 120 against the drilling section 112 in the closing direction, causing the rotating block 121 to rotate in the movable groove 112b. Due to the space of the clearance groove 112c, the arc-shaped shell 120 can rotate at a certain angle relative to the core tube 110, and fits completely with the curve of the drilling section 112 without interference. The arc-shaped shell 120 and the drilling section 112 tightly enclose the complete sampling cavity 110a.

[0108] The drive assembly 140 is activated, which drives the core tube 110 to rotate into the soil layer. The locking component 150 is fixed in place, ensuring that the arc-shaped shell 120 and the semi-circular plate 113 are always tightly fitted and do not shift with vibration.

[0109] After reaching the predetermined depth and being pulled out as a whole, the core tube 110 is laid flat, and the arc-shaped shell 120 is manually pushed to open and close in the opposite direction. The rotating block 121 rotates in the opposite direction under the guidance of the movable groove 112b. Since the clearance groove 112c provides additional moving space and corner allowance, the arc-shaped shell 120 will not get stuck. The arc-shaped shell 120 can smoothly detach from the semi-circular plate 113 and expose the open groove 112a.

[0110] After the arc-shaped shell 120 is fully opened, the open slot 112a on the side wall is opened, and the operator can directly take out the soil sample column from the side to complete the sampling.

[0111] The movable groove 112b provides a predetermined guide trajectory for the rotating block 121, while the clearance groove 112c eliminates structural obstructions in key areas. The two work together to ensure that the arc-shaped shell 120 rotates better during opening and closing, avoiding jamming or deviation.

[0112] Simply rotate the arc-shaped shell 120 in the preset direction, and the rotating block 121 will automatically rotate under the guidance of the movable groove 112b and the clearance groove 112c, without the need for additional tools or secondary alignment, greatly improving the opening and closing efficiency.

[0113] It should be noted that the active groove 112b is roughly a circular recess, and the clearance groove 112c is roughly a fan-shaped open space.

[0114] In at least one embodiment of this application, the peripheral surface of the fixing part 111 is provided with an exhaust hole 111a, and the exhaust hole 111a is connected to the sampling chamber 110a.

[0115] Please refer to Figures 1-6 In one embodiment, after the drilling section 112 spirals into the soil layer and the semi-circular plate 113 and the arc-shaped shell 120 enclose and form a closed sampling cavity 110a, there is still residual air or air generated when the soil is pressed in.

[0116] The vent 111a on the side of the fixing part 111 is immediately opened and connected to the sampling chamber 110a, so that excess gas in the chamber can escape through the vent 111a, avoiding the pressure increase in the chamber due to gas retention and thus preventing the continuous entry of soil.

[0117] As the drive assembly 140 continues to rotate the core tube 110, the sampling chamber 110a is continuously filled, and the exhaust port 111a continuously ensures that air can be discharged in a timely manner without the interference of the airbag effect, so that the soil stratification can smoothly enter the chamber.

[0118] After drilling to the predetermined depth and pulling out as a whole, the vent hole 111a remains connected, and the pressure inside and outside the cavity is quickly balanced, avoiding negative pressure or excessive vacuum caused by the sealed pulling out.

[0119] The vent 111a effectively removes excess air or gas generated during drilling from the sampling chamber 110a, avoiding the formation of air pockets that could hinder soil entry and ensuring the complete and continuous collection of the sample column bedding.

[0120] Before and after the entire sample is pulled out and opened from the side, the vent 111a allows the air pressure inside the cavity to quickly balance with the outside air, preventing sample displacement or tearing caused by sudden pressure drops or rises, and maintaining the original state of the sample.

[0121] When there is no residual air resistance in the cavity, the soil sample slides out more smoothly through the open groove 112a on the side wall, effectively avoiding sample compression or stratification caused by uneven air pressure release, thus improving sample quality and the reliability of subsequent tests.

[0122] It should be noted that the vent 111a is roughly a through hole.

[0123] In at least one embodiment of this application, the fixing bracket 130 includes:

[0124] The fixing plate 131 is provided with a mounting position, through which the core tube 110 passes;

[0125] Multiple fixed telescopic rods 132 are provided, with one end of each fixed telescopic rod 132 rotatably connected to the fixed plate 131 and the other end provided with a fixing nail 133.

[0126] Please refer to Figures 1-6 In one embodiment, during on-site construction, multiple fixed telescopic rods 132 are connected to a fixed plate 131 via hinged arms and can be freely extended to a predetermined angle.

[0127] The operator drives or hooks the lower end fixing nail 133 of the fixed telescopic rod 132 into the ground surface (or the bottom of the pit), and makes slight adjustments to the length of the telescopic rod according to the height of the ground or pit wall, so that the fixing plate 131 is kept horizontal or positioned at a predetermined angle.

[0128] The core tube 110 has passed through the fixing plate 131. During drilling, the three-legged (or multi-legged) support formed by the fixing plate 131 and the fixed telescopic rod 132 greatly improves the overall rigidity and resistance to lateral forces.

[0129] The drive assembly 140 is started to drill. During the drilling process, the torque and lateral vibration are directly transmitted to the ground through the fixed bracket 130, which is jointly borne by the fixed nail 133 and the fixed telescopic rod 132, ensuring that the core tube 110 always maintains the designed direction and depth throughout the entire drilling-extraction-sampling process.

[0130] After sampling, loosen the telescopic rod fixing nail 133, fold and fix the telescopic rod 132, and fold the fixing plate 131 to complete the bracket removal and move to the next sampling point.

[0131] The fixed plate 131 and the multi-point fixed telescopic rod 132 cooperate to form a stable support structure, which can evenly distribute drilling torque and vibration to multiple fixed nails 133, significantly reducing the risk of the core tube 110 deflection or slippage.

[0132] The telescopic rod is adjustable in both length and angle, allowing it to quickly adapt to slopes, uneven ground, or pit walls, ensuring that the coring tube 110 can be accurately centered and operate stably in various environments.

[0133] It should be noted that the fixing plate 131 is roughly in the shape of a circular plate.

[0134] In at least one embodiment of this application, the driving component 140 includes:

[0135] The first drive motor 141 has one end fixed to the end of the fixed plate 131 away from the fixed telescopic rod 132, and the other end is provided with a screw 142.

[0136] The drive plate 143 has a transmission hole 143a. The screw 142 passes through the transmission hole 143a and is connected to the drive plate 143 in a transmission manner. One end of the fixing part 111 is fixed to the drive plate 143.

[0137] Please refer to Figures 1-6 In one embodiment, the fixed end of the first drive motor 141 is firmly installed on the fixed plate 131 and is located on the opposite side of the fixed telescopic rod 132 to ensure that the driving torque will not cause the bracket to become unbalanced.

[0138] The output end of the first drive motor 141 is directly connected to a screw 142. The screw 142 passes through the transmission hole 143a on the drive plate 143 and meshes with the thread or rack on the bottom surface of the drive plate 143. The drive plate 143 is also fixedly connected to one end of the fixing part 111 of the core tube 110.

[0139] Start the first drive motor 141, and the screw 142 will rotate at a high speed accordingly. Since the screw 142 meshes with the drive plate 143, the rotation of the screw 142 is converted into the linear movement of the drive plate 143 - the drive plate 143 is pushed or pulled back along the axial direction of the screw 142.

[0140] The drive plate 143 drives the fixed part 111, the core tube 110 and the drawn semi-circular plate 113 / arc-shaped shell 120 to synchronously rotate into or out of the soil layer, realizing precise control of drilling and withdrawal.

[0141] The rotation speed and direction of the screw 142 are precisely adjusted by the control system, and the feed speed or reverse withdrawal can be changed in real time according to the formation hardness and the depth of the sample to be taken, and the sampling depth is clear at a glance.

[0142] During the entire drilling - pulling out cycle, the drive plate 143 always remains tightly engaged with the screw 142, avoiding loosening caused by vibration or impact, and ensuring the stable movement of the core tube 110.

[0143] The screw 142 - drive plate 143 meshing structure precisely converts the rotation of the first drive motor 141 into linear displacement, and the speed and displacement increment can be finely adjusted, enabling the drilling footage and the withdrawal depth to be accurate to the millimeter level, meeting the requirements of fine geological exploration.

[0144] The thread meshing of the screw 142 and the drive plate 143 is self-locking under force, and it is not easy to reverse or drift due to drilling vibration or mud impact, ensuring the smooth and uninterrupted feeding process of the core tube 110.

[0145] It should be noted that the first drive motor 141 is a motor or a motor, the drive plate 143 is generally a plate-shaped "convex" shape, and the transmission hole 143a is a screw hole.

[0146] In at least one embodiment of the present application, the drive assembly 140 further includes:

[0147] A mounting plate 144 is provided with a first hole 144a, and one end of the screw 142 is rotatably connected to the first hole 144a;

[0148] A guide rod 145, one end of which is fixed to the mounting plate 144 and the other end is fixed to the fixed plate 131.

[0149] Please refer to Figures 1-6 [[ID=3)2]]In one embodiment, in the drive assembly 140, one end of the screw 142 is inserted into the first hole 144a on the mounting plate 144 and rotates through this hole without moving with the mounting plate 144. The mounting plate 144 is relatively independent of the fixed plate 131 through a fixing method, enabling the screw 142 to obtain a stable rotational support when advancing / withdrawing.

[0150] The guide rod 145 is fixed at one end to the mounting plate 144 and at the other end to the fixing plate 131, providing a rigid connection to the mounting plate 144. When the screw 142 rotates and pushes the core tube 110 up and down through the drive plate 143, the guide rod 145 constrains the mounting plate 144 to only make a small linear displacement along the axis of the screw 142, so as to avoid the mounting plate 144 and the screw 142 from lateral shaking or tilting due to load.

[0151] The first drive motor 141 drives the screw 142 to rotate. The screw 142 rotates freely in the first hole 144a of the mounting plate 144, while simultaneously pushing the drive plate 143 and the core tube 110 axially. The guide rod 145 ensures that the relative positions of the mounting plate 144 and the fixed plate 131 are always precisely aligned during operation. The entire drive assembly 140—including the screw 142, the drive plate 143, and the mounting plate 144—works together to achieve stable linear feed.

[0152] Mounting plate 144 provides reliable rotational support for screw 142, while guide rod 145 restricts lateral drift and tilt of mounting plate 144, ensuring that the transmission path of screw 142—drive plate 143—core tube 110 remains coaxial, significantly reducing vibration caused by off-center load or vibration.

[0153] Mounting plate 144 is roughly rectangular, the first hole 144a is a through hole, and guide rod 145 is a round rod.

[0154] It should be noted that the drive assembly 140 also includes a second drive motor, which is mounted on the mounting plate 144 and connected at one end to the fixing part 111 to drive the core tube 110 to rotate around its axis to avoid jamming.

[0155] In at least one embodiment of this application, the fixing plate 131 is provided with a guide groove 131a, the guide groove 131a is located on the mounting position, and the guide groove 131a has an opening, the opening is opened along a first direction A, and the arc-shaped shell 120 can be unfolded or fixed relative to the core tube 110 along the first direction A so that the sampling chamber 110a can be opened or closed.

[0156] Please refer to Figures 1-6 In one embodiment, the fixing plate 131 has a guide groove 131a at its mounting position that is parallel to the radial direction (referred to as the first direction A) of the core tube 110, with one end of the groove opening toward the direction in which the arc-shaped shell 120 can move.

[0157] The tail of the arc-shaped shell 120—that is, the end opposite to the fixing plate 131—is equipped with a pair of engaging blocks 1131, which can engage with the drilling section 112.

[0158] Before drilling, the operator screws the arc-shaped shell 120 into the guide groove 131a in the first direction A, so that the arc-shaped shell 120 engages with the drilling part 112.

[0159] At this time, the arc-shaped shell 120 and the semi-circular plate 113 fit together to form a closed cylindrical sampling cavity 110a.

[0160] After the entire assembly is pulled out and laid flat, the locking block 1131 is disengaged. The operator then rotates the arc-shaped shell 120 out along the opposite first direction A, causing the arc-shaped shell 120 to slide out along the guide groove 131a toward the open end.

[0161] When the slider slides to the slot, the arc-shaped shell 120 can be separated from the side wall of the semi-circular plate 113, and the open slot 112a of the side wall of the sampling cavity 110a is exposed, thus opening the cavity.

[0162] When open, the soil column can be directly removed from the side. After sampling, simply screw the arc-shaped shell 120 in reverse until it reaches the depth of the guide groove 131a and locks it in place. The sampling chamber 110a will then be resealed, and the sampler can move to the next sampling point.

[0163] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A geological exploration sampling device, characterized in that, include: The core tube has a fixing part and a drilling part. An open groove is formed on the peripheral wall of the drilling part, and the open groove extends to the end of the drilling part away from the fixing part. An arc-shaped shell is rotatably connected at one end to the end of the drilling part near the fixed part, and the other end is detachably connected to the core tube. The arc-shaped shell is located in the open groove. A fixed bracket, wherein the fixing part is mounted on the fixed bracket; A drive assembly is mounted on the fixed bracket and rotatably connected to the fixed part; During drilling, the arc-shaped shell is installed on the drilling part and together with the drilling part, they form a cylindrical sampling cavity; during sampling, the end of the arc-shaped shell away from the fixed part is released so that the sampling cavity can communicate with the outside through the open slot.

2. The geological exploration sampling device according to claim 1, characterized in that, The core sampling tube includes: A semicircular plate is rotatably connected at one end to one end of the arc-shaped shell, and detachably connected at the other end to the arc-shaped shell. The semicircular plate is located on the drilling part, and the semicircular plate and the arc-shaped shell surround to form the sampling cavity.

3. The geological exploration sampling device according to claim 2, characterized in that, The semicircular plate has a first rotating groove at the end away from the fixed part; The arc-shaped shell has a second rotating groove at one end away from the fixed part. The arc-shaped shell is fixed to the semi-circular plate so that the first rotating groove and the second rotating groove surround each other to form a rotating groove. The locking element is rotatably connected to the arc-shaped shell and located within the second rotating groove; The locking member is rotated to extend into / disengage from the second rotating groove and engage or disengage from the semicircular plate.

4. The geological exploration sampling device according to claim 3, characterized in that, The semi-circular plate is provided with a locking block, and the locking member is provided with a locking groove. The locking member can engage or disengage with the locking block to fix or release the arc-shaped shell.

5. The geological exploration sampling device according to claim 1, characterized in that, A rotating block is provided at one end of the arc-shaped shell; The drilling section has a movable groove, and the drilling section and / or the fixed section has a clearance groove. The clearance groove and the movable groove are located at the junction of the drilling section and the fixed section. The rotating block is received in the movable groove and is rotatably connected to the movable groove.

6. The geological exploration sampling device according to claim 1, characterized in that, The peripheral surface of the fixing part is provided with an exhaust hole, which is connected to the sampling chamber.

7. The geological exploration sampling device according to claim 1, characterized in that, The fixing bracket includes: A fixing plate is provided with a mounting position, through which the core sampling tube passes; Multiple fixed telescopic rods, one end of which is rotatably connected to the fixed plate, and the other end is provided with a fixing nail.

8. The geological exploration sampling device according to claim 7, characterized in that, The driving component includes: The first drive motor has one end fixed to the end of the fixed plate away from the fixed telescopic rod, and the other end is provided with a screw. The drive plate has a transmission hole, the screw passes through the transmission hole and is connected to the drive plate in a transmission manner, and one end of the fixing part is fixed to the drive plate.

9. The geological exploration sampling device according to claim 8, characterized in that, The driving component also includes: The mounting plate has a first hole, and one end of the screw is rotatably connected to the first hole; The guide rod is fixed at one end to the mounting plate and at the other end to the fixing plate.

10. The geological exploration sampling device according to claim 7, characterized in that, The fixing plate has a guide groove located at the mounting position and has an opening along a first direction. The arc-shaped shell can be unfolded or fixed relative to the core tube along the first direction to open or close the sampling chamber.

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