A device for sampling marine sediments in shallow reef areas and a method of using the same

Abstract

This invention provides a seabed sediment sampling device and its method of use for shallow sea reef areas, belonging to the field of sediment sampling technology. The seabed sediment sampling device for shallow sea reef areas includes a top plate and further includes: a rotating column, rotatably mounted on the lower side of the top plate, with a plurality of placement rings evenly arranged circumferentially on the rotating column, each placement ring containing a sampler, and a positioning component for positioning the sampler; and a fixed ring, fixed to the lower side of the top plate by a first connecting plate, with a rotation groove for rotating the placement rings. This invention enables sampling and sampler replacement via hydraulic drive, making operation simple and quick, facilitating rapid sampling at multiple points and improving sampling efficiency. Furthermore, the connection between the feed inlet and the sampling chamber avoids the circumferential disturbances caused by existing petal and claw spring mechanisms, achieving low-disturbance, high-efficiency sampling.

Description

Technical Field

[0001] This invention relates to the field of sediment sampling technology, and in particular to a seabed sediment sampling device and its method of use in shallow sea reef areas. Background Technology

[0002] Seafloor sediments are categorized into: terrestrial margin materials, biological materials, volcanic materials, dissolved seafloor rocks, and cosmic materials. The study of deep-sea sediments is crucial for the development of authigenic seafloor mineral resources, paleoceanography, and paleoclimatology. Therefore, the study of deep-sea sediments is receiving increasing attention. The analysis and testing of seafloor sediments is an important component of marine exploration; both resource exploration and environmental assessment rely heavily on the analysis and testing of relevant samples. Obtaining sufficient and diverse samples is key to ensuring the quality of analytical testing.

[0003] Current sampling devices can only sample from the same location when sampling water and sediments, making it inconvenient to move and sample from multiple locations. Moreover, after each sampling, the sample needs to be removed and processed before the next sampling can be performed, resulting in low efficiency of seabed sediment sampling. Furthermore, the petal and claw spring mechanisms of various samplers can cause destructive damage to the sediment while cutting it off, making it difficult to achieve the required low disturbance. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a seabed sediment sampling device and its usage method in shallow sea reef areas.

[0005] A seabed sediment sampling device for shallow reef areas, comprising a top plate, and further comprising:

[0006] A rotating column is rotatably mounted on the underside of a top plate. Several placement rings are evenly arranged in a circle on the rotating column. Each placement ring contains a sampler, and the placement ring is equipped with a positioning component for positioning the sampler.

[0007] A fixed ring is fixed to the lower side of the top plate by a first connecting plate, and a rotating groove is provided on the fixed ring for allowing the ring to rotate.

[0008] A positioning ring, which is disposed on the lower side of the fixed ring via a second connecting plate, is used to guide the downward movement of the sampler;

[0009] And a pressing mechanism, which is mounted on the top plate and is used to drive the sampler to move downward within the positioning ring;

[0010] The pressing mechanism drives the rotating column to rotate.

[0011] Preferably, the pressing mechanism includes a hydraulic cylinder fixed on the top plate, a telescopic tube fixedly connected to the piston rod of the hydraulic cylinder, a connecting rod disposed on the lower side of the telescopic tube, and a pressure plate fixedly connected to the bottom of the connecting rod. The pressure plate moves against the sampler, and a baffle is fixedly disposed on the first connecting plate to move against the upper surface of the pressure plate.

[0012] Preferably, the sampler includes a force-bearing seat that moves against the pressure plate, an arc-shaped block fixed to the lower side of the force-bearing seat, a rotating tube rotatably connected to the outside of the arc-shaped block, and a torsion spring disposed between the arc-shaped block and the rotating tube. The arc-shaped block has a sampling cavity, the bottom of the rotating tube is set to be conical, and the bottom of the rotating tube has a feed port that communicates with the sampling cavity.

[0013] Preferably, the force-bearing seat includes a lower plate fixedly connected to the arc-shaped block, a connecting column fixedly mounted on the lower plate, and an upper plate fixedly mounted on the top of the connecting column, with the pressure plate movably connected between the upper plate and the lower plate.

[0014] Preferably, the positioning component includes a fixing groove formed on the placement ring, a positioning block slidably connected in the fixing groove, and a first elastic element disposed between the positioning block and the inner wall of the fixing groove. The lower plate has an annular groove that cooperates with the positioning block, and the upper and lower sides of the end of the positioning block away from the first elastic element are respectively provided with an upper inclined surface and a lower inclined surface.

[0015] Preferably, a movable ring is provided on the upper side of the lower plate, and a second elastic element is provided between the movable ring and the lower plate. The movable ring is connected to a conical pressure seat that moves against the lower plate via a connecting rod, and the conical surface of the conical pressure seat moves against the upper inclined surface of the positioning block.

[0016] Preferably, an elastic telescopic rod is fixedly provided at the bottom of the lower plate, and an abutment plate that moves against the positioning ring is fixedly provided at the bottom of the elastic telescopic rod. A top rod is fixedly provided on the abutment plate, and a spiral blade that cooperates with the top rod is provided on the rotating tube.

[0017] Preferably, the arc-shaped block has a groove, a positioning rod is slidably connected in the groove, a third elastic element is provided between the positioning rod and the inner wall of the groove, and the rotating tube has a positioning hole that cooperates with the positioning rod.

[0018] Preferably, a fixed rod is fixed on the telescopic tube, and a movable rod is slidably connected to the fixed rod through a spring. The end of the movable rod is set as an arc surface. A track groove for sliding of the fixed rod is opened on the rotating column. The track groove includes several vertical grooves and an inclined groove set between two adjacent vertical grooves. A vertical strip is fixed on the top inner wall of the vertical groove. An inclined guide surface is set at the bottom end of the vertical strip. A limit groove is opened at the top of the vertical strip. An inclined strip is fixed on the inner wall of the inclined groove. The outer wall of the inclined strip and the inner wall of the limit groove are on the same plane or arc surface. The inner wall of the vertical groove and the outer wall of the inclined strip are not on the same plane.

[0019] The present invention also discloses a method for using a seabed sediment sampling device in a shallow reef area, which further includes the following steps:

[0020] S1: Targeting:

[0021] The device was lowered to the seabed in a shallow reef area by ship, maintaining the sampling device in a vertical position to avoid collision with the reef;

[0022] S2: Drive downward pressure:

[0023] The piston rod of the hydraulic cylinder extends, causing the telescopic tube to move the fixed rod downward. The movable rod of the fixed rod enters the inclined bar of the inclined groove from the limiting groove. During this period, the rotating column is driven to rotate, moving the sampled sampler away and switching the unsampled sampler to the working position, i.e., the lower side of the hydraulic cylinder.

[0024] As the piston rod continues to extend, it pushes the pressure plate downward through the telescopic tube. The pressure plate applies pressure to the sampler's bearing seat, and the positioning block contracts due to the downward pressure of the conical pressure seat, releasing the locking of the placement ring to the sampler and allowing the sampler to be inserted into the sediment.

[0025] S3: Sample Collection

[0026] The sediment enters the sampling chamber through the feed inlet at the bottom of the rotating tube. When the sampling chamber is almost full, the abutment plate at the bottom of the elastic telescopic rod abuts against the positioning ring, the elastic telescopic rod retracts, and the top rod abuts against the spiral blade. The rotating tube rotates relative to the arc block, and the feed inlet no longer coincides with the sampling chamber, sealing the bottom of the sampling chamber. At the same time, the positioning rod elastically inserts into the positioning hole to lock the sampling chamber in a closed state to prevent sample loss.

[0027] S4: Sample recovery:

[0028] The hydraulic cylinder retracts, and the pressure plate pushes the sampler up by pushing the upper plate. The positioning block is re-engaged into the annular groove under the action of elasticity, fixing the position of the sampler. At this time, the top wall of the pressure plate abuts against the bottom wall of the baffle.

[0029] As the hydraulic cylinder continues to retract, the telescopic tube is stretched, and the movable rod on the fixed rod moves along the track groove. At this time, it moves vertically upward along the vertical groove to the top, which is the limiting groove of the vertical bar.

[0030] S5: Multi-point sampling:

[0031] When it is necessary to perform sampling work at other locations again, repeat steps S1-S4 to sample the sampling area. After sampling is completed, lift the device to the water surface, take out the sample and record the location and depth information.

[0032] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0033] 1. In this invention, by controlling the piston rod of the hydraulic cylinder to continue moving downward, the piston rod drives the telescopic tube to move downward, and the fixed rod connected to the telescopic tube moves downward synchronously. The movable rod inside the fixed rod moves synchronously. Since the movable rod is in the limiting groove, it cannot move directly downward in the vertical groove. The movable rod enters the inclined bar of the inclined groove along the inner wall of the limiting groove. As the movable rod moves downward in the inclined groove, the rotating column rotates relative to the top plate, thereby causing the rotating column to drive the multiple samplers connected to the bottom to rotate synchronously. When the movable rod enters the vertical groove from the inclined groove, the sampler position is changed. The sampler that has completed sampling is transferred to another position, and the sampler to be sampled is placed on the lower side of the hydraulic cylinder. At this time, as the piston rod of the hydraulic cylinder continues to extend, the pressure plate presses down on the sampler to perform sampling. The sampling work and sampler replacement work can be realized by hydraulic drive. The operation is simple and quick, which facilitates rapid sampling of multiple points and improves sampling efficiency.

[0034] 2. In this invention, by aligning the feed inlet with the bottom opening of the sampling chamber during sampling, the seabed sediment sample can directly enter the sampling chamber as the sampler moves downward. This eliminates the disturbance caused by the petal or claw spring mechanism flipping during sampling, as is present in the prior art. When sampling is about to be completed, the top rod abuts against the spiral plate, causing the arc-shaped block and the rotating tube to rotate relative to each other. This prevents the feed inlet from overlapping with the bottom opening of the sampling chamber, thus sealing the bottom opening of the sampling chamber. As the rotating tube rotates, it automatically cuts off the sediment adhering to the seabed and the sample in the sampling chamber. This solves the problem of circumferential disturbance caused by the flipping of the petal or claw spring mechanism during sampling in the prior art, achieving efficient sampling without disturbance.

[0035] 3. In this invention, after the rotating tube rotates relative to the arc block, the positioning rod aligns with the positioning hole. The positioning rod is inserted into the positioning hole under the compressed third elastic element, thereby locking the position between the rotating tube and the arc block, preventing the sample collected inside the sampling chamber from falling out, maintaining the integrity of the sample collection, and ensuring the sample collection effect. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a partial structural schematic diagram of the present invention;

[0038] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle;

[0039] Figure 4 This is a schematic diagram of the external structure of the sampler of the present invention;

[0040] Figure 5 This is a schematic diagram of the external structure of the force-bearing seat of the present invention;

[0041] Figure 6 This is a cross-sectional structural diagram of the force-bearing seat of the present invention;

[0042] Figure 7 This is a schematic cross-sectional view of the arc-shaped block and rotating tube of the present invention.

[0043] Figure 8 This is a schematic diagram of the separation structure of the arc-shaped block and the rotating tube of the present invention;

[0044] Figure 9 This is a schematic diagram of the cross-sectional structure of the force-bearing seat and the placement ring of the present invention;

[0045] Figure 10 For the present invention Figure 9 Enlarged structural diagram of section B in the middle;

[0046] Figure 11 This is a schematic diagram of the structure of the top of the rotating column of the present invention.

[0047] In the diagram: 1. Top plate; 2. Rotating column; 3. Placement ring; 4. Sampler; 401. Force-bearing seat; 4011. Lower plate; 4012. Connecting column; 4013. Upper plate; 402. Arc-shaped block; 4021. Sampling chamber; 403. Rotating tube; 4031. Feed inlet; 4032. Spiral blade; 4033. Positioning hole; 404. Torsion spring; 5. Fixing ring; 501. First connecting plate; 5011. Baffle; 502. Rotating groove; 503. Second connecting plate; 6. Positioning ring; 7. Hydraulic cylinder; 701. Telescopic tube; 702. 703. Connecting rod; 804. Pressure plate; 905. Fixing groove; 806. Positioning block; 807. First elastic element; 908. Movable ring; 909. Second elastic element; 900. Conical pressure seat; 10. Annular groove; 11. Elastic telescopic rod; 111. Abutment plate; 112. Top rod; 12. Groove; 121. Positioning rod; 122. Third elastic element; 13. Fixing rod; 131. Movable rod; 14. Track groove; 141. Vertical groove; 1411. Vertical bar; 1412. Limiting groove; 142. Inclined groove; 1421. Inclined bar. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A seabed sediment sampling device for shallow reef areas, comprising a top plate 1, and further comprising:

[0052] A rotating column 2 is rotatably mounted on the lower side of the top plate 1. Several placement rings 3 are evenly arranged in a circle on the rotating column 2. Each placement ring 3 contains a sampler 4. The placement ring 3 is equipped with a positioning component for positioning the sampler 4.

[0053] The fixing ring 5 is fixed to the lower side of the top plate 1 by the first connecting plate 501. The fixing ring 5 is provided with a rotating groove 502 for the ring 3 to rotate.

[0054] Positioning ring 6 is set on the lower side of fixed ring 5 via second connecting plate 503, and is used to guide the downward movement of sampler 4;

[0055] And a pressing mechanism, which is set on the top plate 1, for driving the sampler 4 to move downward within the positioning ring 6;

[0056] Among them, the pressing mechanism drives the rotating column 2 to rotate;

[0057] Specifically, the device is transported to the target reef area and lowered to the seabed using a ship's hoisting system. If the sampling device is not lowered to the seabed via a connecting rod, outriggers can be installed on the outside of the sampling device to ensure that it maintains a stable and vertical posture on the seabed. The pressing mechanism is controlled to apply force to the positioning component, releasing the locking of the placement ring 3 to the sampler 4. The sampler 4 is then inserted into the seabed sediment along the positioning ring 6 to perform sampling. After sampling, the pressing mechanism resets the sampler 4, allowing the placement ring 3 to reposition the sampler 4. The action of the pressing mechanism also rotates the rotating column 2, causing the placement ring 3 around the rotating column 2 to rotate the sampler 4, removing the sampled sampler 4. A new sampler 4 is then precisely switched to the underside of the pressing mechanism. The sampling and replacement of the sampler 4 can be achieved through hydraulic drive. The operation is simple and quick, facilitating rapid sampling at multiple points. It eliminates the need to remove and process the sample after each sampling before proceeding to the next sampling, thus improving sampling efficiency.

[0058] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As a preferred technical solution in this embodiment, the pressing mechanism includes a hydraulic cylinder 7 fixed on the top plate 1, a telescopic tube 701 fixedly connected to the piston rod of the hydraulic cylinder 7, a connecting rod 702 disposed on the lower side of the telescopic tube 701, and a pressure plate 703 fixedly connected to the bottom of the connecting rod 702. The pressure plate 703 moves against the sampler 4. A baffle 5011 is fixed on the first connecting plate 501 and moves against the upper end surface of the pressure plate 703. The baffle 5011 can limit the upper limit position of the pressure plate 703 during the recycling process.

[0059] Furthermore, the sampler 4 includes a force-bearing seat 401 that movably abuts against the pressure plate 703, an arc-shaped block 402 fixed to the lower side of the force-bearing seat 401, a rotating tube 403 rotatably connected to the outside of the arc-shaped block 402, and a torsion spring 404 disposed between the arc-shaped block 402 and the rotating tube 403. A sampling cavity 4021 is provided inside the arc-shaped block 402. A drain outlet is provided at the top of the sampling cavity 4021 to ensure the smooth entry of seabed sediments and reduce resistance. The bottom of the rotating tube 403 is set as a cone, and a feed inlet 4031 communicating with the sampling cavity 4021 is provided at the bottom of the rotating tube 403.

[0060] Furthermore, the force-bearing seat 401 includes a lower plate 4011 fixedly connected to the arc-shaped block 402, a connecting column 4012 fixed on the lower plate 4011, and an upper plate 4013 fixed on the top of the connecting column 4012. The pressure plate 703 is movably connected between the upper plate 4013 and the lower plate 4011.

[0061] Furthermore, an elastic telescopic rod 11 is fixedly provided at the bottom of the lower plate 4011, and an abutment plate 111 is fixedly provided at the bottom of the elastic telescopic rod 11 to move against the positioning ring 6. A push rod 112 is fixedly provided on the abutment plate 111, and a spiral plate 4032 that cooperates with the push rod 112 is provided on the rotating tube 403.

[0062] Specifically, the hydraulic cylinder 7 ensures that the sampler 4 can overcome the resistance of the seabed sediments and be inserted into the predetermined depth at a uniform speed. The hydraulic uniform pressing method, rather than impact sampling, can preserve the original structure of the sediments to the greatest extent. When the hydraulic cylinder 7 is activated, the piston rod extends and pushes the telescopic tube 701, connecting rod 702 and pressure plate 703 to move down as a whole. The pressure plate 703 acts directly on the force-bearing seat 401 of the sampler 4, pressing it smoothly into the seabed sediments. During this process, the hydraulic system can provide continuous and uniform pressure, effectively reducing the disturbance to the original structure of the sediments.

[0063] When the sampler 4 reaches the predetermined depth and the sampling chamber 4021 of the sampler 4 is about to be filled, the abutment plate 111 on the bottom side of the lower plate 4011 abuts against the positioning ring 6. As the sampler 4 moves down, the elastic telescopic rod 11 is compressed, and the top rod 112 applies pressure to the spiral blade 4032. The spiral blade 4032 drives the rotating tube 403 to rotate relative to the arc block 402, so that the conical structure at the bottom of the rotating tube 403 blocks the bottom opening of the sampling chamber 4021. The feed port 4031 is no longer connected to the cavity of the sampling chamber 4021, and the bottom of the sampling chamber 4021 is sealed to prevent sample loss.

[0064] Subsequently, hydraulic cylinder 7 begins to retract, and the piston rod of hydraulic cylinder 7 retracts, causing pressure plate 703 to rise. When pressure plate 703 moves up to contact baffle 5011, baffle 5011 acts as a mechanical limit, and pressure plate 703 stops moving up. At this time, sampler 4 has been lifted back to its initial position and re-locked by positioning component, while telescopic tube 701 continues to retract a distance with the piston rod of hydraulic cylinder 7, preparing for subsequent driving of rotating column 2 to rotate and for automatic rotation and repositioning for the next sampling.

[0065] By aligning the feed inlet 4031 with the bottom opening of the sampling chamber 4021 during sampling, the sampler 4 can directly feed seabed sediment samples into the sampling chamber 4021 as it moves downward. This avoids the disturbance caused by the petal or claw spring mechanism flipping during sampling, as is common in existing technologies. When sampling is about to be completed, the top rod 112 abuts against the spiral blade 4032, causing the arc block 402 and the rotating tube 403 to rotate relative to each other. This prevents the feed inlet 4031 from overlapping with the bottom opening of the sampling chamber 4021, thus sealing the bottom opening of the sampling chamber 4021. As the rotating tube 403 rotates, it automatically cuts off the sediment adhering to the seabed and the sample in the sampling chamber 4021. This solves the problem of circumferential disturbance caused by the petal or claw spring mechanism flipping during sampling in existing technologies, achieving efficient sampling despite disturbance.

[0066] It should be noted that, in order to prevent the sample from being lost during the lifting process, a groove 12 is provided on the arc-shaped block 402, and a positioning rod 121 is slidably connected in the groove 12. A third elastic element 122 is provided between the positioning rod 121 and the inner wall of the groove 12. A positioning hole 4033 is provided on the rotating tube 403 to cooperate with the positioning rod 121. After the rotating tube 403 rotates relative to the arc-shaped block 402, the positioning rod 121 aligns with the positioning hole 4033. The positioning rod 121 is inserted into the positioning hole 4033 under the compressed third elastic element 122, so that the position between the rotating tube 403 and the arc-shaped block 402 is locked, preventing the sample collected inside the sampling chamber 4021 from falling out.

[0067] Reference Figure 6 , Figure 9 and Figure 10 As a preferred technical solution in this embodiment, the positioning component includes a fixing groove 8 opened on the placement ring 3, a positioning block 801 slidably connected in the fixing groove 8, and a first elastic element 802 disposed between the positioning block 801 and the inner wall of the fixing groove 8. An annular groove 10 that cooperates with the positioning block 801 is opened on the lower plate 4011. An upper inclined surface and a lower inclined surface are respectively opened on the upper and lower sides of the end of the positioning block 801 away from the first elastic element 802.

[0068] Furthermore, a movable ring 9 is provided on the upper side of the lower plate 4011, and a second elastic element 901 is provided between the movable ring 9 and the lower plate 4011. The movable ring 9 is connected to a conical pressure seat 902 that moves against the lower plate 4011 via a connecting rod. The conical surface of the conical pressure seat 902 moves against the upper inclined surface of the positioning block 801.

[0069] Specifically, before sampling, the sampler 4 is placed in the placement ring 3. At this time, under the thrust of the first elastic element 802, the positioning block 801 extends outward, and its end just fits into the annular groove 10 of the lower plate 4011. This action firmly fixes the sampler 4 in the initial position, preventing it from shaking or falling off during the lowering or moving of the sampling device.

[0070] When sampling is required, the pressing mechanism is activated, and the pressure plate 703 moves downward. The pressure plate 703 first contacts and presses the movable ring 9, causing it to move downward against the force of the second elastic element 901. The movable ring 9 drives the conical pressure seat 902 to move downward synchronously through the connecting rod. The conical surface of the conical pressure seat 902 then presses the upper inclined surface of the positioning block 801. Due to the effect of the inclined surface, the vertical downward force is decomposed, generating a horizontal component force that causes the positioning block 801 to retract into the fixed groove 8. As the positioning block 801 moves laterally and retracts, the side of the lower plate 4011 can also press the upper inclined surface of the positioning block 801, causing the positioning block 801 to retract further. The positioning block 801 then exits from the annular groove 10 and returns to the fixed groove 8, releasing the lock on the sampler 4. At this time, the pressure plate 703 can directly press on the force-bearing seat 401 of the sampler 4, pushing it downward into the seabed sediment for sampling.

[0071] After sampling is completed, the pressing mechanism is raised, and the pressure plate 703 drives the sampler 4 to reset to the initial position through the upper plate 4013 of the force seat 401. During this period, the upper plate 4013 will not contact the reset positioning block 801. As the force seat 401 continues to move upward, the cone at the top and edge of the lower plate 4011 presses against the lower inclined surface at the bottom of the positioning block 801, causing the positioning block 801 to retract into the fixing groove 8 to avoid the upward movement of the force seat 401. When the sampler 4 is reset to the initial height, the annular groove 10 on the lower plate 4011 is aligned with the positioning block 801 again. Under the push of the first elastic element 802, the positioning block 801 pops out again and automatically locks into the annular groove 10, relocking the sampler 4 and preparing for the next operation or recycling.

[0072] The sampler 4 can be automatically locked and released without manual intervention, which is especially suitable for scenarios that require continuous multi-point sampling and greatly improves the efficiency of operation. It can effectively prevent the sampler 4 from accidentally falling off due to water flow impact or collision in complex shallow sea reef environments, ensuring the safety of equipment and samples.

[0073] Reference Figure 1 , Figure 2 , Figure 3 and Figure 11As a preferred technical solution in this embodiment, a fixed rod 13 is fixed on the telescopic tube 701, and a movable rod 131 is slidably connected to the fixed rod 13 through a spring. The end of the movable rod 131 is set as an arc surface, or a ball is set at the end of the movable rod 131 to reduce wear during movement. A track groove 14 for sliding of the fixed rod 13 is opened on the rotating column 2. The track groove 14 includes several vertical grooves 141 and an inclined groove 142 set between two adjacent vertical grooves 141. A vertical bar 1411 is fixed on the top inner wall of the vertical groove 141. An inclined guide surface is set at the bottom end of the vertical bar 1411. A limiting groove 1412 is opened at the top of the vertical bar 1411. An inclined bar 1421 is fixed on the inner wall of the inclined groove 142. The outer wall of the inclined bar 1421 and the inner wall of the limiting groove 1412 are in the same plane or arc surface. The inner wall of the vertical groove 141 and the outer wall of the inclined bar 1421 are not in the same plane.

[0074] Specifically, the sampler 4 moves upward as the piston rod of the hydraulic cylinder 7 retracts. After the sampler 4 returns to its initial position, the hydraulic cylinder 7 continues to retract. At this time, the pressure plate 703 is limited by the baffle 5011, and the telescopic tube 701 is stretched. When the telescopic tube 701 is stretched, it drives the fixed rod 13 to move upward. When the movable rod 13 moves upward with the fixed rod 13, it will continue to move upward along the inclined guide surface of the vertical bar 1411 in the vertical groove 141 and will not enter the inclined groove 142 (the inclined bar 1421 blocks the movable rod 131 from entering the inclined groove 142). During this period, as the slope of the vertical bar 1411 changes, the movable rod 131 automatically retracts into the fixed rod 13. Then the movable rod 131 enters the top of the vertical groove 141. At this time, the movable rod 131 is located in the limiting groove 1412 of the vertical bar 1411.

[0075] When it is necessary to sample other areas of the seabed again, the sampling device is moved to the designated position, and the piston rod of the hydraulic cylinder 7 is controlled to continue to move downward. When the piston rod drives the telescopic tube 701 downward, the fixed rod 13 connected to the telescopic tube 701 moves downward synchronously, and the movable rod 131 inside the fixed rod 13 moves synchronously. Since the movable rod 131 is in the limiting groove 1412, it cannot move downward directly in the vertical groove 141 (the side wall of the limiting groove 1412 prevents the movable rod 131 from moving downward in the vertical groove 141). The movable rod 131 moves along the inner wall of the limiting groove 1412. As the movable rod 131 moves down in the inclined groove 142, the rotating column 2 rotates relative to the top plate 1, causing the rotating column 2 to drive the multiple samplers 4 connected to the bottom to rotate synchronously. When the movable rod 131 enters the vertical groove 141 from the inclined groove 142, the position of the sampler 4 is changed. The sampler 4 that has completed sampling is transferred to other positions, and the sampler 4 to be sampled is placed under the hydraulic cylinder 7. At this time, as the piston rod of the hydraulic cylinder 7 continues to extend, the pressure plate 703 presses down on the sampler 4 to perform sampling.

[0076] The present invention also discloses a method for using a seabed sediment sampling device in a shallow reef area, which further includes the following steps:

[0077] S1: Targeting:

[0078] The device was lowered to the seabed in a shallow reef area by ship, maintaining the sampling device in a vertical position to avoid collision with the reef;

[0079] S2: Drive downward pressure:

[0080] The piston rod of the hydraulic cylinder 7 extends, causing the telescopic tube 701 to drive the fixed rod 13 to move down. The movable rod 131 of the fixed rod 13 enters the inclined bar 1421 of the inclined groove 142 from the limiting groove 1412. During this period, the rotating column 2 is driven to rotate, moving the sampled sampler 4 away and the unsampled sampler 4 to the working position, i.e. the lower side of the hydraulic cylinder 7.

[0081] As the piston rod continues to extend, it pushes the pressure plate 703 downward through the telescopic tube 701. The pressure plate 703 applies pressure to the force-bearing seat 401 of the sampler 4. The positioning block 801 contracts due to the downward pressure of the conical pressure seat 902, releasing the locking of the placement ring 3 to the sampler 4, allowing the sampler 4 to be inserted into the sediment.

[0082] S3: Sample Collection

[0083] Sediment enters the sampling chamber 4021 through the feed inlet 4031 at the bottom of the rotating tube 403. When the sampling chamber 4021 is almost full, the abutment plate 111 at the bottom of the elastic telescopic rod 11 abuts against the positioning ring 6, and the elastic telescopic rod 11 retracts, causing the top rod 112 to abut against the spiral plate 4032. The rotating tube 403 rotates relative to the arc block 402, and the feed inlet 4031 no longer overlaps with the sampling chamber 4021, sealing the bottom of the sampling chamber 4021. At the same time, the positioning rod 121 is elastically inserted into the positioning hole 4033 to lock the sampling chamber 4021 in a closed state to prevent sample loss.

[0084] S4: Sample recovery:

[0085] When the hydraulic cylinder 7 retracts, the pressure plate 703 pushes the sampler 4 upward by pushing the upper plate 4013. The positioning block 801 is re-engaged into the annular groove 10 under the action of elasticity, fixing the position of the sampler 4. At this time, the top wall of the pressure plate 703 abuts against the bottom wall of the baffle 5011.

[0086] When the hydraulic cylinder 7 continues to retract, the telescopic tube 701 is stretched, and the movable rod 131 on the fixed rod 13 moves along the track groove 14. At this time, it moves vertically upward along the vertical groove 141 to the top, that is, the limiting groove 1412 of the vertical bar 1411.

[0087] S5: Multi-point sampling:

[0088] When it is necessary to perform sampling work at other locations again, repeat steps S1-S4 to sample the sampling area. After sampling is completed, lift the device to the water surface, take out the sample and record the location and depth information.

[0089] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0090] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A seabed sediment sampling device for shallow reef areas, comprising a top plate (1), characterized in that, Also includes: A rotating column (2) is rotatably disposed on the lower side of the top plate (1). Several placement rings (3) are evenly arranged on the rotating column (2) in a circular pattern. Each placement ring (3) contains a sampler (4). The placement ring (3) is provided with a positioning component for positioning the sampler (4). A fixing ring (5) is fixed to the lower side of the top plate (1) by a first connecting plate (501). A rotating groove (502) for placing the ring (3) to rotate is provided on the fixing ring (5). Positioning ring (6), which is set on the lower side of fixed ring (5) through second connecting plate (503) to guide the downward movement of sampler (4); And a pressing mechanism, which is disposed on the top plate (1) and is used to drive the sampler (4) to move downward within the positioning ring (6); The pressing mechanism drives the rotating column (2) to rotate; The pressing mechanism includes a hydraulic cylinder (7) fixed on the top plate (1), a telescopic tube (701) fixedly connected to the piston rod of the hydraulic cylinder (7), a connecting rod (702) provided on the lower side of the telescopic tube (701), and a pressure plate (703) fixedly connected to the bottom of the connecting rod (702). The pressure plate (703) moves against the sampler (4). A baffle (5011) is fixed on the first connecting plate (501) and moves against the upper end face of the pressure plate (703). The sampler (4) includes a force-bearing seat (401) that moves against the pressure plate (703), an arc-shaped block (402) fixed on the lower side of the force-bearing seat (401), a rotating tube (403) rotatably connected to the outside of the arc-shaped block (402), and a torsion spring (404) disposed between the arc-shaped block (402) and the rotating tube (403). A sampling cavity (4021) is provided in the arc-shaped block (402), and the bottom of the rotating tube (403) is set as a cone, and the bottom of the rotating tube (403) is provided with a feed inlet (4031) that communicates with the sampling cavity (4021). A fixed rod (13) is fixed on the telescopic tube (701). A movable rod (131) is slidably connected to the fixed rod (13) through a spring. The end of the movable rod (131) is set as an arc surface. A track groove (14) for sliding of the fixed rod (13) is opened on the rotating column (2). The track groove (14) includes several vertical grooves (141) and an inclined groove (142) set between two adjacent vertical grooves (141). A vertical strip (1411) is fixedly provided on the inner wall of the top of the vertical strip (1411). An inclined guide surface is provided at the bottom end of the vertical strip (1411). A limiting groove (1412) is opened at the top of the vertical strip (1411). An inclined strip (1421) is fixedly provided on the inner wall of the inclined groove (142). The outer wall of the inclined strip (1421) and the inner wall of the limiting groove (1412) are on the same plane or arc surface. The inner wall of the vertical groove (141) and the outer wall of the inclined strip (1421) are not on the same plane.

2. The seabed sediment sampling device for shallow reef areas according to claim 1, characterized in that, The force-bearing seat (401) includes a lower plate (4011) fixedly connected to the arc-shaped block (402), a connecting column (4012) fixed on the lower plate (4011), and an upper plate (4013) fixed on the top of the connecting column (4012). The pressure plate (703) is movably connected between the upper plate (4013) and the lower plate (4011).

3. The seabed sediment sampling device for shallow reef areas according to claim 2, characterized in that, The positioning component includes a fixing groove (8) opened on the placement ring (3), a positioning block (801) slidably connected in the fixing groove (8), and a first elastic element (802) disposed between the positioning block (801) and the inner wall of the fixing groove (8). The lower plate (4011) is provided with an annular groove (10) that cooperates with the positioning block (801). The upper and lower sides of the end of the positioning block (801) away from the first elastic element (802) are respectively provided with an upper inclined surface and a lower inclined surface.

4. The seabed sediment sampling device for shallow reef areas according to claim 3, characterized in that, A movable ring (9) is provided on the upper side of the lower plate (4011). A second elastic element (901) is provided between the movable ring (9) and the lower plate (4011). The movable ring (9) is connected to a conical pressure seat (902) that moves against the lower plate (4011) via a connecting rod. The conical surface of the conical pressure seat (902) moves against the upper inclined surface of the positioning block (801).

5. A seabed sediment sampling device for shallow reef areas according to claim 4, characterized in that, The bottom of the lower plate (4011) is fixedly provided with an elastic telescopic rod (11), and the bottom of the elastic telescopic rod (11) is fixedly provided with an abutment plate (111) that moves against the positioning ring (6). A top rod (112) is fixedly provided on the abutment plate (111), and a spiral plate (4032) that cooperates with the top rod (112) is provided on the rotating tube (403).

6. The seabed sediment sampling device for shallow reef areas according to claim 5, characterized in that, The arc-shaped block (402) has a groove (12) and a positioning rod (121) is slidably connected in the groove (12). A third elastic element (122) is provided between the positioning rod (121) and the inner wall of the groove (12). The rotating tube (403) has a positioning hole (4033) that cooperates with the positioning rod (121).

7. A method of using the seabed sediment sampling device for shallow reef areas according to claim 6, characterized in that, It also includes the following steps: S1: Targeting: The device was lowered to the seabed in a shallow reef area by ship, maintaining the sampling device in a vertical position to avoid collision with the reef; S2: Drive downward pressure: The piston rod of the hydraulic cylinder (7) extends, causing the telescopic tube (701) to drive the fixed rod (13) to move down. The movable rod (131) of the fixed rod (13) enters the inclined bar (1421) of the inclined groove (142) from the limiting groove (1412). During this period, the rotating column (2) is driven to rotate, and the sampled sampler (4) is moved away. The unsampled sampler (4) is switched to the working position, that is, the lower side of the hydraulic cylinder (7). As the piston rod continues to extend, it pushes the pressure plate (703) down through the telescopic tube (701). The pressure plate (703) applies pressure to the force seat (401) of the sampler (4). The positioning block (801) contracts due to the downward pressure of the conical pressure seat (902), releasing the locking of the placement ring (3) on the sampler (4) and allowing the sampler (4) to be inserted into the sediment. S3: Sample Collection The sediment enters the sampling chamber (4021) through the feed inlet (4031) at the bottom of the rotating tube (403). When the sampling chamber (4021) is full, the abutment plate (111) at the bottom of the elastic telescopic rod (11) abuts against the positioning ring (6), and the elastic telescopic rod (11) contracts, causing the top rod (112) to abut against the spiral blade (4032). The rotating tube (403) rotates relative to the arc block (402), and the feed inlet (4031) no longer overlaps with the sampling chamber (4021), sealing the bottom of the sampling chamber (4021). At the same time, the positioning rod (121) is elastically inserted into the positioning hole (4033) to lock the sampling chamber (4021) in a closed state to prevent sample loss. S4: Sample recovery: The hydraulic cylinder (7) retracts, and the pressure plate (703) pushes the sampler (4) upward by pushing the upper plate (4013). The positioning block (801) is re-engaged into the annular groove (10) under the action of elasticity, fixing the position of the sampler (4). At this time, the top wall of the pressure plate (703) abuts against the bottom wall of the baffle (5011). When the hydraulic cylinder (7) continues to retract, the telescopic tube (701) is stretched, and the movable rod (131) on the fixed rod (13) moves along the track groove (14). At this time, it moves vertically upward along the vertical groove (141) to the top, that is, the limiting groove (1412) of the vertical bar (1411). S5: Multi-point sampling: When it is necessary to perform sampling work at other locations again, repeat steps S1-S4 to sample the sampling area. After sampling is completed, lift the device to the water surface, take out the sample and record the location and depth information.

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