Sediment in-situ layering fixed sampler based on push core

Abstract

The utility model belongs to the technical field of marine sediment sampling, and particularly relates to a push core-based sediment in-situ layering fixed sampler, which comprises two parts, one part is push core, and the other part is a sediment layering cutting mechanism, the push core-based sediment in-situ layering fixed sampler is matched with a manipulator of an underwater robot, the sampling of 35cm sediment is completed through the push core, the sampling time is shortened, and the sampling efficiency is improved. And push core layering is completed by using the sediment layering and dividing mechanism on the lower layer, the sample box is used for completing lattice division, fixation and preservation of the sample, and finally the deep sea submersible vehicle is used for carrying the sample to a deck position to complete fidelity sampling work of the sediment. According to the utility model, the functions of sediment acquisition and layered fixation of sediment samples are realized, an automatic process is used in the whole process, the problem of complicated operation is avoided, the effects of simplifying equipment and operation are achieved, and the operation success rate and the operation efficiency are improved. And meanwhile, the operation and carrying of the underwater robot are more accurate and effective.

Description

Technical Field

[0001] This invention belongs to the field of marine sediment sampling technology, specifically a sediment in-situ stratification and fixation sampler based on pushcore (sediment sampling device). Background Technology

[0002] Seabed sediments harbor abundant microbial and other life communities, which are crucial for understanding and studying the evolution of life and environmental changes in the deep sea. Developing and utilizing these seabed resources necessitates the development of sediment samplers. Due to the unique high-pressure environment of the seabed, it is essential to minimize fluctuations in the external environment of microorganisms during sediment collection, avoiding the impact of external pressure changes on their life characteristics. Fidelity sampling provides the most authentic samples for marine resource and environmental research and allows for the discovery of new characteristics of nature through deep-sea biological studies. Fidelity sampling encompasses three aspects: undisturbed sampling, pressure- and temperature-controlled sampling, and fixed-storage sampling.

[0003] Regarding fixed storage sampling, the "A Secondary Sampling Device for High-Fidelity Seabed Sedimentation," published on August 28, 2013 (Publication No. CN 103267657A), while achieving low-disturbance sampling and improving the sampling rate, still suffers from drawbacks such as complex operations required for sediment acquisition and transfer within the sample chamber, resulting in a low success rate. The "In-situ Sediment Fixed Sampler," published on October 22, 2021 (Publication No. CN113532906A), utilizes an ROV robotic arm to perform fixed sampling of seabed sediments, but it cannot perform stratified fixed sampling for stratigraphic analysis. Utility Model Content

[0004] In view of the above-mentioned problems in the existing technology, and in combination with the characteristics of the in-situ fixation method of seabed sediments, the purpose of this utility model is to provide a pushcore-based in-situ sediment stratification fixation sampler.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] This utility model includes a pushcore and a sediment stratification and segmentation mechanism;

[0007] The pushcore includes a gripper column, a sliding column, a sampling tube cap, a sample pressure ring, and a sampling tube. One end of the sampling tube is threadedly connected to the sampling tube cap, and the other end of the sampling tube is the sample inlet. One end of the sliding column is connected to the gripper column. The sample pressure ring is located in the internal space formed by the sampling tube cap and the sampling tube. The sample pressure ring is in sealed contact with the inner wall of the sampling tube and can move relative to it. The other end of the sliding column is threadedly connected to the sample pressure ring. A limiting device is installed on the sampling tube cap. The limiting device restricts the movement of the sample pressure ring during the pushcore sampling process. When the pushcore completes sampling and is placed into the sediment stratification and separation mechanism, the limiting device releases the restriction on the sample pressure ring. The sampling tube cap and the sample pressure ring are respectively provided with water passage holes for drainage during the downward pressing process of the pushcore sampling. The sampling tube cap is provided with a sealing device for sealing the water passage holes on the sample pressure ring during the upward lifting process of the pushcore sampling.

[0008] The sediment stratification and segmentation mechanism includes a pressure rod, a lead screw mechanism, a follower mechanism, a pushcore placement bucket, a placement bucket fixing plate, a protrusion, a sample plate, a sample storage box, support legs, a lead screw drive device, and a turntable drive device. Multiple support legs are installed on the outer edge of the sample plate. The sample storage box is located below the sample plate and is sealed and rotatably connected to it. Multiple sample boxes are arranged along the circumferential direction on the sample storage box. The pushcore placement bucket is fixed to the sample plate. Pushcores that have been sampled are placed inside the pushcore placement bucket. The sample plate contains corresponding pushcores. The placement bucket has a through hole, and a cutting mesh is provided below the through hole. The cutting mesh is located between the sample plate and the sample storage box. The lead screw mechanism, lead screw drive device, and turntable drive device are respectively installed on the sample plate. The lead screw drive device drives the follower mechanism to rise and fall through the lead screw mechanism. One end of the pressure rod is rotatably installed on the follower mechanism. The placement bucket fixing plate is fixed on the pushcore placement bucket. The pressure rod is always in contact with the protrusion provided on the placement bucket fixing plate, and flips through the action of the protrusion during the descent of the follower mechanism. The other end of the pressure rod presses on the gripper column of the pushcore after flipping.

[0009] Wherein: the middle part of the sample pressure ring is threadedly connected to the other end of the sliding column; the water passage hole on the sample pressure ring is an internal water passage hole; there are multiple internal water passage holes, which are evenly opened in the circumferential direction around the middle part of the threaded connection between the sample pressure ring and the sliding column; the outer edge of the sample pressure ring is respectively provided with a limiting block groove and a sealing ring groove; the limiting device is housed in the limiting block groove and can move radially back and forth relative to the sampling tube locking cap; the sealing ring groove contains an O-ring sealing ring that seals with the inner wall of the sampling tube.

[0010] The sample pressure ring is in the shape of an inverted "T". The vertical side of the "T" has an axial hole in the middle, and the hole wall has a fixing thread for threaded connection with the other end of the sliding column. The bottom of the hole is provided with a limiting plate to limit the sliding column. Each of the internal water passage holes is opened on the vertical side of the "T" and located on the periphery of the central hole, penetrating the sample pressure ring axially. The sealing ring groove is opened on the outer side of the horizontal side of the "T". A limiting block groove is formed between the horizontal side and the vertical side of the "T".

[0011] The limiting device includes a limiting block, a compression spring, and a limiting bolt. The limiting bolt is installed on the sampling tube cap. The limiting block includes a limiting movable column and a limiting movable block. One side of the limiting movable block is fixedly connected to the limiting movable column or is an integral structure. A blind hole is opened on the other side of the limiting movable block. One end of the compression spring is inserted into the blind hole, and the other end of the compression spring abuts against the limiting bolt. A limiting groove is opened on the sampling tube cap to allow the limiting block to move radially back and forth. The two ends of the limiting groove are respectively opened to the opposite outer surfaces of the sampling tube cap.

[0012] The limiting movable block is square, the limiting movable column is cylindrical, and the limiting groove on the sampling tube lock cap corresponding to the limiting movable block is elongated, used to place the limiting block into the sampling tube lock cap. The limiting groove on the sampling tube lock cap corresponding to the limiting movable column is round, and the end of the limiting movable column protrudes from the round hole under the action of the compression spring.

[0013] The sealing device includes a spring, a hard nylon ring, and a soft sealing ring. The hard nylon ring and the soft sealing ring are arranged from bottom to top on the top of the sample pressure ring. The other end of the sliding column is passed through the hard nylon ring and the soft sealing ring respectively. The spring is sleeved on the other end of the sliding column. One end of the spring is fixed inside the sampling tube cap, and the lower end of the spring abuts against the soft sealing ring.

[0014] The sampling tube cap is a hollow structure with an open bottom and a stepped hole in the middle. The water passage on the sampling tube cap is the upper water passage. There are multiple upper water passages, which are evenly distributed around the stepped hole in the circumferential direction and are connected to the inside of the sampling tube cap.

[0015] The gripper column has a sliding column fixing plug inside. The outer side of the gripper column and one end of the sliding column are both provided with fixing holes. One end of the sliding column is inserted into the sliding column fixing plug. The connection with the gripper column is achieved by a fixing rod inserted into the fixing holes on the outer side of the gripper column and one end of the sliding column. Multiple teeth are evenly threaded along the circumference inside the gripper column around the sliding column fixing head. The top of each tooth is a tooth head that protrudes from the gripper column. The tooth head is a blocking component of the pressure rod. During the downward pressing of the pressure rod, the tooth heads prevent the gripper column from detaching.

[0016] The pressure bar is U-shaped, with rotating rods on both sides of the U-shape and a pressure bar column at the bottom. One end of each rotating rod is rotatably connected to a follower mechanism, and the other end of each rotating rod is connected to the pressure bar column. The pressure bar column presses onto the gripper column of the pushcore after the pressure bar flips.

[0017] The lead screw mechanism includes a support end gear, a mounting base, a lead screw, and a nut seat. The lead screw drive device includes a meshing gear and a lead screw motor. The lead screw motor is fixed on the sample plate, and the meshing gear is connected to the output shaft of the lead screw motor. The mounting base is fixed to the placement bucket fixing plate. The lower end of the lead screw is rotatably mounted on the sample plate, and the upper end of the lead screw is rotatably connected to the mounting base. The support end gear is mounted on the lead screw and moves in conjunction with the lead screw, and the support end gear meshes with the meshing gear for transmission. A nut seat is threaded onto the lead screw, and the nut seat is connected to the follower mechanism.

[0018] The follower mechanism includes a rotating rod stop and a follower support frame. The follower support frame is U-shaped. Both ends of the U-shaped opening are provided with rotating holes for rotating connection with the pressure rod. Both ends of the U-shaped opening are provided with rotating rod stops for limiting the flipping of the pressure rod. The bottom of the U-shape is provided with a nut seat fixing hole for connecting with the lead screw mechanism.

[0019] The pushcore placement container is a hollow cylinder with open ends. The inner top wall of the pushcore placement container is a guide surface that slopes inward from top to bottom. The guide surface compresses the limiting device during the process of placing the pushcore into the pushcore placement container, thereby causing the limiting device to move radially inward on the sampling tube cap, releasing the restriction on the sample pressure ring. Below the guide surface is a pushcore support platform for supporting the sampling tube cap. After the pushcore is placed into the pushcore placement container, the pushcore support platform is flush with the lower edge of the sampling tube cap.

[0020] The two sides of the barrel fixing plate are inclined to the middle. Each side of the barrel fixing plate is provided with a barrel side support plate. One end of the barrel side support plate is fixed to the barrel fixing plate, and the other end of the barrel side support plate is provided with a protrusion.

[0021] The sample plate and the sample storage box are connected by a T-shaped rotating rod. The horizontal side of the T-shaped rotating rod is located above the sample plate, and a gear pressure plate is placed on the horizontal side of the T-shaped rod. The gear pressure plate is fixed to the sample plate by pressure plate screws, thereby pressing the T-shaped rotating rod and the sample plate tightly. The vertical end of the T-shaped rotating rod extends out of the sample storage box and is threadedly connected to the support cap. A turntable meshing gear is rotatably installed on the vertical side of the T-shaped rod. The turntable meshing gear is fixed to the sample storage box by sample slot fixing bolts. The turntable drive device includes a turntable motor and a turntable motor gear. The turntable motor is fixed to the sample plate, and the turntable motor gear is connected to the turntable motor shaft of the turntable motor. The turntable motor gear and the turntable meshing gear are both located between the sample plate and the sample storage box and mesh with each other for transmission.

[0022] The sample storage box is disc-shaped with a central rotating disk. Multiple sample boxes are evenly arranged around the circumference of the rotating disk. Each sample box contains a fixative solution. A sealing groove is provided around each sample box, containing a sealing ring for sealing with the sample plate, ensuring a seal during rotation. Multiple rollers are mounted on the sample plate, making rolling contact with the rotating disk. The sample plate also has a set of holes corresponding to the number of sample boxes. Each set of holes includes a fixative injection hole and a pressure relief hole. The fixative injection hole injects fixative solution into the corresponding sample box, and the pressure relief hole releases pressure from the sample box.

[0023] The advantages and positive effects of this utility model are as follows:

[0024] 1. This utility model meets the requirements for in-situ fixation of seabed sediments. Most of the materials are non-metallic and have strong corrosion resistance. The fixed storage can be rotated and replaced as needed to meet storage requirements.

[0025] 2. This utility model is based on an underwater robot system. It can utilize the robot's precise positioning, real-time observation, and robotic arm operation to control the pushcore to complete sediment sampling. It also uses a novel in-situ segmentation and fixation method to ensure the fixation of sediment samples.

[0026] 3. This invention solves the problems of sediment acquisition and sediment sample stratification and fixation, using a fully automated process to avoid complex operations, thus simplifying equipment and operations and improving the success rate and efficiency of the operation. Furthermore, the use of an underwater robot for operation and carrying makes the process more accurate and effective. Attached Figure Description

[0027] Figure 1 This is one of the three-dimensional structural diagrams of the pushcore of this utility model;

[0028] Figure 2This is the second three-dimensional structural diagram of the pushcore of this utility model;

[0029] Figure 3 This is the main view of the pushcore structure of this utility model;

[0030] Figure 4 This is the right view of the figure;

[0031] Figure 5 for Figure 1 A three-dimensional structural diagram with the sampling tube cap removed;

[0032] Figure 6 for Figure 3 Sectional view A-A in the middle;

[0033] Figure 7 for Figure 4 The B-B section view in the diagram;

[0034] Figure 8 This is a schematic diagram of the sample port pressure ring in the pushcore of this utility model;

[0035] Figure 9 This is a schematic diagram of the limiting block in the pushcore of this utility model;

[0036] Figure 10 This is a three-dimensional structural diagram of the sliding column pressing into the sampling tube in the pushcore of this utility model;

[0037] Figure 11 This is a cross-sectional view of the sliding column pressed into the sampling tube in the pushcore of this utility model;

[0038] Figure 12 This is one of the three-dimensional structural schematic diagrams of this utility model (the pressure rod is not flipped);

[0039] Figure 13 This is the second three-dimensional structural schematic diagram of the present invention (pressure rod flipping);

[0040] Figure 14 for Figure 12 A schematic diagram of the three-dimensional structure after removing the sample plate;

[0041] Figure 15 This is a three-dimensional structural diagram of the present invention after the sample plate has been removed (the pressure bar is flipped and pressed down);

[0042] Figure 16 This is a cross-sectional view of the internal structure of this utility model (pressure rod flipped down);

[0043] Figure 17 This is a three-dimensional structural diagram of the barrel fixing plate in the sediment layering and segmentation mechanism of this utility model;

[0044] Figure 18 for Figure 17 A three-dimensional structural diagram after the side support plates for the placement bucket have been installed;

[0045] Figure 19 This is a three-dimensional structural diagram of the follower mechanism in the sediment layering and segmentation mechanism of this utility model;

[0046] Figure 20 This is a cross-sectional view of the pushcore placement bucket in the sediment stratification and segmentation mechanism of this utility model;

[0047] Figure 21 This is a three-dimensional structural diagram of the sample storage box in the sediment layering and segmentation mechanism of this utility model;

[0048] Figure 22 This is a schematic diagram of the sediment layering and segmentation mechanism of this utility model without the insertion of a pushcore;

[0049] Figure 23 This is a schematic diagram of the structure of the sediment layering and segmentation mechanism of this utility model after inserting the pushcore;

[0050] Figure 24 for Figure 23 A schematic diagram of the structure of the inverted pressure bar;

[0051] Figure 25 for Figure 24 A schematic diagram of the structure in which the intermediate pressure bar flips to the gripper column and begins to press down;

[0052] Figure 26 for Figure 25 A schematic diagram of the structure after the central pressure rod has been pressed down to the bottom;

[0053] Wherein: 1 is the tooth head, 2 is the tooth body, 3 is the gripper post, 4 is the fixing hole, 5 is the fixing rod, 6 is the sliding post fixing plug, 7 is the sliding post, 8 is the sampling tube lock cap, 9 is the upper water passage hole, 10 is the limiting bolt, 11 is the limiting groove, 12 is the limiting block, 13 is the blind hole, 14 is the compression spring, 15 is the limiting movable post, 16 is the limiting movable block, 17 is the spring, 18 is the hard nylon ring, 19 is the soft sealing ring, 20 is the sample pressure ring, 21 is the limiting block groove, 22 is the fixing thread, 2 3 is the internal water passage hole, 24 is the O-ring seal, 25 is the limiting plate, 26 is the sampling tube, 27 is the sampling tube fixing thread, 28 is the sample inlet, 29 is the pressure rod, 2901 is the pressure rod column, 2902 is the rotating rod, 30 is the lead screw mechanism, 3001 is the support end gear, 3002 is the mounting base, 3003 is the lead screw, 3004 is the nut seat, 31 is the follower mechanism, 3101 is the rotating rod stop, 3102 is the rotating hole, 3103 is the follower support frame, 3104 is the follower support frame. 32 is the nut seat fixing hole; 32 is the pushcore placement bucket; 3201 is the guide surface; 3202 is the pushcore lifting platform; 3203 is the placement bucket fixing hole; 33 is the placement bucket fixing plate; 34 is the placement bucket side support plate; 3401 is the protrusion; 35 is the sample plate; 3501 is the fixative injection hole; 3502 is the roller; 3503 is the pressure relief hole; 36 is the sample storage box; 3601 is the sample box; 3602 is the sealing groove; 3603 is the cutting edge. Net, 3604 is turntable, 37 is support leg, 38 is support leg bolt, 39 is lead screw drive device, 3901 is meshing gear, 3902 is lead screw motor, 40 is turntable drive device, 4001 is turntable motor, 4002 is turntable motor shaft, 4003 is turntable motor gear, 41 is power control barrel, 42 is gear pressure plate, 43 is turntable meshing gear, 44 is T-shaped rotating rod, 45 is pressure plate screw, 46 is lifting cap, 47 is sample slot fixing bolt. Detailed Implementation

[0054] The present invention will now be described in further detail with reference to the accompanying drawings.

[0055] This utility model includes a pushcore (sediment sampling device) and a sediment stratification and segmentation mechanism.

[0056] like Figures 1-11As shown, the pushcore of this utility model includes a gripper column 3, a sliding column 7, a sampling tube locking cap 8, a sample pressure ring 20, a sampling tube 26, a limiting device, and a sealing device. One end of the sampling tube 26 is threadedly connected to the sampling tube locking cap 8, and the other end of the sampling tube 26 is the sample inlet 28. One end of the sliding column 7 is connected to the gripper column 3. The sample pressure ring 20 is located in the internal space formed by the sampling tube locking cap 8 and the sampling tube 26. The sample pressure ring 20 is in sealed contact with the inner wall of the sampling tube 26 and can move relative to it. The other end of the sliding column 7 passes through the sampling tube locking cap 8 and is in contact with the sample... The pressure ring 20 is threaded; a limiting device is installed on the sampling tube cap 8. The limiting device restricts the movement of the sample pressure ring 20 during the pushcore sampling process. When the pushcore completes the sampling and is placed into the sediment stratification and separation mechanism, the limiting device releases the restriction on the sample pressure ring 20; the sampling tube cap 8 and the sample pressure ring 20 are respectively provided with water passage holes for drainage during the pushcore sampling and pressing process. The sampling tube cap 8 is provided with a sealing device for sealing the water passage holes on the sample pressure ring 20 during the pushcore sampling and lifting process.

[0057] In this embodiment, the gripper column 3 is cylindrical and serves as the gripping part of the submersible's manipulator, facilitating downward sampling. The gripper column 3 has a sliding column fixing plug 6 inside. Fixing holes 4 are provided on the outer side of the gripper column 3 and at one end of the sliding column 7. One end of the sliding column 7 is inserted into the sliding column fixing plug 6, and the connection to the gripper column 3 is achieved by a fixing rod 5 inserted into the fixing holes 4 on the outer side of the gripper column 3 and at one end of the sliding column 7. Multiple (four in this embodiment) tooth bodies 2 are evenly threaded along the circumference inside the gripper column 3 surrounding the sliding column fixing plug 6. The top of each tooth body 2 is a tooth head 1 protruding from the top surface of the gripper column 3. The tooth head 1 acts as a blocking element for the pressure rod 29, preventing it from detaching from the gripper column 3 during the downward pressing process of the pressure rod 29.

[0058] In this embodiment, the sampling tube cap 8 is cylindrical with a hollow structure open at the bottom and a stepped hole in the middle. Multiple water holes 9 (six in this embodiment) are located at the top of the sampling tube cap 8, evenly spaced around the stepped hole along the circumference and connected to the interior of the sampling tube cap 8. Two limiting grooves 11 are provided inside the sampling tube cap 8, symmetrically arranged about the axial centerline of the sampling tube cap 8. Each limiting groove 11 extends to opposite outer surfaces of the sampling tube cap 8 at both ends.

[0059] In this embodiment, two identical limiting devices are symmetrically mounted on the sampling tube cap 8. Each limiting device includes a limiting block 12, a compression spring 14, and a limiting bolt 10. The limiting bolt 10 is mounted on the sampling tube cap 8 near its edge, and its axial center line is parallel to the axial center line of the sampling tube cap 8. The limiting block 12 includes a limiting movable post 15 and a limiting movable block 16. In this embodiment, the limiting movable block 16 is square, and the limiting movable post 15 is cylindrical. One side of the limiting movable block 16 is fixed to or integral with the limiting movable post 15, and the other side of the limiting movable block 16 has a blind hole 13. One end of the compression spring 14 is inserted into the blind hole 13, and the other end of the compression spring 14 abuts against the limiting bolt 10. Each limiting groove 11 on the sampling tube cap 8 accommodates a limiting block 12 and a compression spring 14. The limiting block 12 can reciprocate radially within the limiting groove 11. The limiting groove 11 on the sampling tube lock cap 8, which corresponds to the limiting movable block 16, is elongated and is used to place the limiting block 12 into the sampling tube lock cap 8. The limiting bolt 10 is located at one end of the elongated groove and is opposite to the blind hole 13 on the limiting movable block 16. The limiting groove 11 on the sampling tube lock cap 8, which corresponds to the limiting movable post 15, is round. The end of the limiting movable post 15 extends out of the round hole under the action of the compression spring 14.

[0060] In this embodiment, the sample pressure ring 20 is inverted "T" shape. An axial hole is formed in the middle of the vertical side of the "T," and a fixing thread 22 is formed on the hole wall for threaded connection with the other end of the sliding column 7. A limiting plate 25 is provided at the bottom of the hole to limit the sliding column 7. The water passage on the sample pressure ring 20 is an internal water passage 23, which is multiple in number. Each internal water passage 23 is located on the vertical side of the "T," outside the central hole, and penetrates the sample pressure ring 20 axially. The outer edge of the sample pressure ring 20 is provided with a limiting block groove 21 and a sealing ring groove. The limiting block groove 21 is formed between the horizontal and vertical sides of the "T." The limiting block 12 is housed within the limiting block groove 21 and can reciprocate radially relative to the sampling tube locking cap 8. When the limiting movable block 16 on the limiting block 12 limits the sample pressure ring 20, it abuts against the groove wall of the upper limiting block groove 21 of the sample pressure ring 20, thereby restricting the movement of the sample pressure ring 20. Before the pushcore is placed into the pushcore placement container 32 of the sediment stratification and separation mechanism, the limiting block 12, due to the action of the compression spring 14, causes the limiting movable column 15 to extend out of the sampling tube locking cap 8, and the limiting movable block 16 to engage with the limiting block groove 21, restricting the movement of the sample pressure ring 20. During the process of the pushcore completing sampling and placing it into the pushcore placement container 32 of the sediment stratification and separation mechanism, the limiting movable column 15 on the limiting block 12 is squeezed by the pushcore placement container 32, and the limiting movable column 15 is squeezed into the sampling tube locking cap 8. The limiting movable block 16 moves radially out of the limiting block groove 21, the compression spring 14 is compressed, and the restriction on the sample pressure ring 20 is released, allowing the sample pressure ring 20 to move up and down. The sealing ring groove is opened on the outer side of the "T"-shaped horizontal side, and the sealing ring groove contains an O-ring sealing ring 24 that seals with the inner wall of the sampling tube 26. When the sample pressure ring 20 is pressed down with the sliding column 7, it will squeeze the deposits inside the sampling tube 26 located below the sample pressure ring 20, thus completing the sampling of the deposits.

[0061] The sealing device in this embodiment includes a spring 17, a hard nylon ring 18, and a soft sealing ring 19. Both the hard nylon ring 18 and the soft sealing ring 19 are circular rings with a central opening, positioned from bottom to top on the sample pressure ring 20. The other end of the sliding column 7 passes through the central openings of the hard nylon ring 18 and the soft sealing ring 19, respectively. The spring 17 is sleeved on the other end of the sliding column 7, with one end of the spring 17 fixed inside the sampling tube cap 8, and the lower end of the spring 17 abutting against the soft sealing ring 19. When the gripper column 3 pushes the sliding column 7 down, the water inside the sampling tube 26 is discharged through the internal water passage 23, the soft sealing ring 19, the hard nylon ring 18, and the upper water passage 9. When the gripper column 3 pulls the sliding column 7 up, the external water, due to the action of the spring 17, is sealed by the hard nylon ring 18 pressing against the soft sealing ring 19, thus completing sample collection. In this embodiment, the soft sealing ring 19 can be made of rubber.

[0062] In this embodiment, the sampling tube 26 is a hollow cylinder with open ends. The upper outer surface of the sampling tube 26 is provided with a sampling tube fixing thread 27 for threaded connection with the sampling tube locking cap 8.

[0063] like Figures 12-21 As shown, the sediment stratification and segmentation mechanism of this utility model includes a pressure rod 29, a lead screw mechanism 30, a follower mechanism 31, a pushcore placement bucket 32, a placement bucket fixing plate 33, a protrusion 3401, a sample plate 35, a sample storage box 36, support legs 37, a lead screw drive device 39, and a turntable drive device 40. Multiple support legs 37 are provided on the outer edge of the sample plate 35, and each support leg 37 is fixed to the edge of the sample plate 35 by support leg bolts 38. The sample storage box 36 is located below the sample plate 35 and is sealed and rotatably connected to it. The sample storage box 36 has a circumferential edge... Multiple sample boxes 3601 are provided in the direction; the pushcore placement bucket 32 ​​is fixed on the sample plate 35, and the pushcore after sampling is placed in the pushcore placement bucket 32. The part of the sample plate 35 corresponding to the pushcore placement bucket 32 ​​has a through hole, and a cutting mesh 3603 is provided below the through hole. The cutting mesh 3603 is located between the sample plate 35 and the sample storage box 36 and is used to cut the deposits in the pushcore. In this embodiment, the cutting mesh 3603 is a commercially available 316 stainless steel woven mesh with a mesh size of 3.5mm and a wire thickness of 1.0mm. The lead screw mechanism 30, the lead screw drive device 39, and the turntable drive device 40 are respectively installed on the sample plate 35. The lead screw drive device 39 drives the follower mechanism 31 to rise and fall through the lead screw mechanism 30. One end of the pressure rod 29 is rotatably installed on the follower mechanism 31. The placement bucket fixing plate 33 is fixed on the pushcore placement bucket 32. The pressure rod 29 is always in contact with the protrusion 3401 provided on the placement bucket fixing plate 33. During the descent of the follower mechanism 31, the protrusion 3401 is used to achieve the flipping. After the flipping, the other end of the pressure rod 29 presses on the gripper column 3 of the pushcore.

[0064] In this embodiment, the pushcore placement container 32 is a hollow cylinder with open ends. The top inner wall of the pushcore placement container 32 is a guide surface 3201 that slopes inward from top to bottom to facilitate the entry of the pushcore. During the process of the pushcore being placed into the pushcore placement container 32, the guide surface 3201 squeezes the limiting movable column 15, thereby causing the limiting block 12 to move radially inward on the sampling tube locking cap 8, so that the limiting movable block 16 is disengaged from the limiting block groove 21, thereby releasing the restriction on the sample pressure ring 20. Below the guide surface 3201, there is a pushcore lifting platform 3202 for supporting the sampling tube locking cap 8. After the pushcore is placed into the pushcore placement container 32, the pushcore lifting platform 3202 is flush with the lower edge of the sampling tube locking cap 8. The bottom of the pushcore placement container 32 has a long strip-shaped placement container fixing hole 3203 along the radial direction. The pushcore placement container 32 is fixed to the sample plate 35 by bolts. The bolts extend into the placement container fixing hole 3203 and are fixed to the pushcore placement container 32.

[0065] In this embodiment, the two sides and the middle of the placement bucket fixing plate 33 are inclined, and the middle of the placement bucket fixing plate 33 is used to fix it to the pushcore placement bucket 32; each side of the placement bucket fixing plate 33 is provided with a placement bucket side support plate 34, one end of the placement bucket side support plate 34 is fixed to the placement bucket fixing plate 33, and the other end of the placement bucket side support plate 34 is provided with a protrusion 3401 on the outer side.

[0066] The lead screw mechanism 30 in this embodiment includes a support end gear 3001, a mounting base 3002, a lead screw 3003, and a nut seat 3004. The lead screw drive device 39 is the main body for sediment movement sampling, including a meshing gear 3901 and a lead screw motor 3902. The lead screw motor 3902 is fixed on the sample plate 35 and provides kinetic energy. The meshing gear 3901 is connected to the output shaft of the lead screw motor 3902. The mounting base 3002 is fixed to the top of the middle part of the placement bucket fixing plate 33. The lower end of the lead screw 3003 is rotatably mounted on the sample plate 35, and the upper end of the lead screw 3003 is rotatably connected to the mounting base 3002. The support end gear 3001 is mounted on the lead screw 3003 and is linked with the lead screw 3003. The support end gear 3001 meshes with the meshing gear 3901 for transmission. The nut seat 3004 is threadedly connected to the lead screw 3003 and is used to connect to the follower mechanism 31. When the lead screw motor 3902 is working, it drives the meshing gear 3901 to rotate. Through the meshing transmission between the meshing gear 3901 and the support end gear 3001, the nut seat 3004 moves up and down.

[0067] The follower mechanism 31 in this embodiment includes a rotating rod stop 3101 and a follower support frame 3103. The follower support frame 3103 is U-shaped. Both ends of the U-shaped opening are provided with rotating holes 3102 for rotating connection with the pressure rod 29. Both ends of the U-shaped opening are provided with rotating rod stops 3101 for limiting the flipping of the pressure rod 29. The bottom of the U-shape is provided with a nut seat fixing hole 3104. The nut seat 3004 is installed in the nut seat fixing hole 3104, thereby realizing that the follower mechanism 31 moves up and down together with the nut seat 3004.

[0068] In this embodiment, the pressure rod 29 is U-shaped, with rotating rods 2902 on both sides and a pressure rod column 2901 at the bottom. One end of each rotating rod 2902 is rotatably connected to the rotating holes 3102 at both ends of the U-shaped opening of the follower support frame 3103, and is supported by the follower support frame 3103 when not flipped. The other end of each rotating rod 2902 is connected via the pressure rod column 2901, which presses against the gripper column 3 of the pushcore after the pressure rod 29 flips. When the follower mechanism 31 moves up and down with the nut seat 3004, the pressure rod 29 also moves up and down with the follower mechanism 31. During the up and down movement, the pressure rod 29 flips through the action of the protrusion 3401. The rotating rod stop 3101 is used to limit the flipping of the rotating rod 2902 and prevent the rotating rod 2902 from disengaging from the protrusion 3401.

[0069] In this embodiment, the sample plate 35 and the sample storage box 36 are connected by a T-shaped rotating rod 44. The horizontal T-shaped edge of the rotating rod 44 is located above the sample plate 35 and contacts the upper surface of the sample plate 35. A gear pressure plate 42 is placed on the horizontal T-shaped edge, and the gear pressure plate 42 is fixed to the sample plate 35 by pressure plate screws 45, thereby pressing the rotating rod 44 and the sample plate 35 together. The vertical T-shaped end of the rotating rod 44 extends out of the sample storage box 36 and is threadedly connected to the lifting cap 46. A turntable meshing gear 43 is rotatably mounted on the vertical T-shaped edge, and the turntable meshing gear 43 is fixed to the sample storage box 36 by sample slot fixing bolts 47, thereby realizing the linkage between the turntable meshing gear 43 and the sample storage box 36. The turntable drive device 40 includes a turntable motor 4001 and a turntable motor gear 4003. The turntable motor 4001 is fixed on the sample plate 35 and is the main body for the turntable rotation sampling. The turntable motor shaft 4002 of the turntable motor 4001 is connected to the turntable motor gear 4003. The turntable motor gear 4003 and the turntable meshing gear 43 are both located between the sample plate 35 and the sample storage box 36 and mesh with each other for transmission.

[0070] In this embodiment, the sample storage box 36 is disc-shaped with a central turntable 3604. A T-shaped rotating rod 44 passes through the central hole of the sample plate 35 and the turntable 3604. Multiple sample boxes 3601 are evenly arranged around the circumference of the turntable 3604 for sample storage. The sample boxes 3601 are pre-filled with fixative. In this embodiment, the sample boxes 3601 contain RNAlater fixative or other RNA preservation solutions. The preservation solution is a water-soluble, non-toxic tissue storage reagent that can rapidly penetrate into the tissue to stabilize and protect cellular RNA. Using RNAlater preservation solution eliminates the need for immediate tissue sample processing and freezing of samples in liquid nitrogen for subsequent processing. Collecting tissue blocks and immersing them in the RNAlater solution for preservation prevents damage to the quality and quantity of RNA obtained during subsequent RNA extraction. RNAlater fixative is existing technology. Reference: NATURE COMMUNICATIONS (2020) 11:3454 | https: / / doi.org / 10.1038 / s41467-020-17284-4 | www.nature.com / naturecommunications, page 9, paragraph 1, discloses RNAlater fixative. Each sample box 3601 has a sealing groove 3602 around its periphery. The sealing groove 3602 contains a sealing ring for sealing with the sample plate 35, achieving a seal during the rotation of the sample storage box 36. Multiple rollers 3502 are installed on the sample plate 35, and the rollers 3502 roll in contact with the turntable 3604, facilitating the rotation of the sample storage box 36. Each roller 3502 on the sample plate 35 has a square hole at its mounting location for easy installation and maintenance. The sample plate 35 also has a set of holes that correspond one-to-one with the number of sample boxes 3601. Each set of holes includes a fixative injection hole 3501 and a pressure relief hole 3503. The fixative injection hole 3501 is used to inject fixative into the corresponding sample box 3601, and the pressure relief hole 3503 is used to relieve pressure in the sample box 3601. When the sample storage box 36 is rotated into position, the sample box 3601 is aligned with the fixative injection hole 3501 above it. When the pressure is too high, it can be relieved through the pressure relief hole 3503.

[0071] In this embodiment, a power control tank 41 is also installed on the sample plate 35. The lead screw motor 3902 and the turntable motor 4001 are connected to the power control tank 41 via watertight cables. The power control tank 41 provides power and communication, and completes the work sequence according to the work process. The power control tank 41 in this embodiment is prior art and will not be described in detail here.

[0072] The method of using the pushcore-based in-situ sediment stratification and fixation sampler of this utility model includes the following steps:

[0073] Step A: Clean the pushcore and each sample box 3601 on the sample storage box 36 at the shore-based end;

[0074] Step B: After cleaning, assemble the device. In the initial state, inject fixative into sample cartridge 3601, and place the entire fixative sampler into the submersible, with the pushcore placed separately. For ease of operation, the pushcore can be laid horizontally; the pressure bar 29 should be laid flat, as shown below. Figure 22 As shown;

[0075] Step C: The fixed sampler is lowered to the seabed using a submersible, and the pushcore is inserted into the sediment by a robotic arm for sampling. After sampling, the pushcore is placed into the pushcore placement container 32. During placement, the guide surface 3201 on the pushcore placement container 32 presses against the limiting movable post 15, causing the limiting movable post 15 to retract into the sampling tube locking cap 8. The limiting movable block 16 disengages from the limiting block groove 21, thereby releasing the restriction on the sample pressure ring 20. The sample pressure ring 20 can then move relative to the sampling tube 26. Figure 23 As shown; the lead screw motor 3902 operates, driving the lead screw 3003 to rotate, which in turn drives the follower mechanism 31 to descend via the nut seat 3004. During the descent of the follower mechanism 31, the pressure rod 29 simultaneously flips under the action of the protrusion 3401, as shown. Figure 24 As shown; the pressure rod 29 flips to the top surface of the gripper column 3, causing the gripper column 3 to press down, as... Figure 25 As shown; the gripper column 3 moves the sample pressure ring 20 downward via the sliding column 7, causing the deposits inside the sampling tube 26 to be pressed down and enter the sample box 3601 after being cut by the cutting mesh 3603. Figure 26 As shown;

[0076] Step D: The turntable motor 4001 operates, and through the meshing transmission between the turntable motor gear 4003 and the turntable meshing gear 43, it drives the sample storage box 36 to rotate, so that the next adjacent sample box 3601 rotates to the bottom of the cutting mesh 3603, thus completing the replacement of the sample box 3601.

[0077] In step E, the lead screw motor 3902 reverses its operation, driving the follower mechanism 31 and the pressure rod 29 to rise via the lead screw mechanism 30. The pressure rod 29 flips and resets under the action of the protrusion 3401. The robotic arm pulls the gripper column 3 upward, which in turn pulls the sample pressure ring 20 back to its original position via the sliding column 7. When the pushcore is removed from the pushcore placement container 32, the limiting block 12 resets under the action of the compression spring 14, and the limiting movable block 16 moves into the limiting block groove 21 to limit the sample pressure ring 20.

[0078] Step F, repeat steps C, D, and E to complete the fixation of the multilayer sediment sample;

[0079] Step G: Use an ROV to bring back the fixed sampler;

[0080] Step H: After recycling, disassemble the sample storage box 36, open the sample plate 35 to expose each sample box 3601 on the sample storage box 36, and obtain the sample.

[0081] This invention, in conjunction with an underwater robot's manipulator, can sample 35cm of sediment using a pushcore. The pushcore layer is created using a lower sediment stratification mechanism, and the sample container 3601 secures the sample within its compartments. Finally, the sample is transported to the deck using a deep-sea submersible for high-fidelity sediment sampling.

Claims

1. A pushcore-based in-situ layered stationary sediment sampler, characterized by: Including pushcore and sediment stratification mechanisms; The pushcore includes a gripper column (3), a sliding column (7), a sampling tube cap (8), a sample pressure ring (20), and a sampling tube (26). One end of the sampling tube (26) is threadedly connected to the sampling tube cap (8), and the other end of the sampling tube (26) is the inlet (28). One end of the sliding column (7) is connected to the gripper column (3). The sample pressure ring (20) is located in the internal space formed by the sampling tube cap (8) and the sampling tube (26). The sample pressure ring (20) is sealed against the inner wall of the sampling tube (26) and can move relative to it. The other end of the sliding column (7) is connected to the sample pressure ring (28). 0) Threaded connection; A limiting device is installed on the sampling tube cap (8). The limiting device restricts the movement of the sample pressure ring (20) during the pushcore sampling process. During the process of the pushcore completing the sampling and placing it into the sediment stratification and separation mechanism, the limiting device releases the restriction on the sample pressure ring (20); The sampling tube cap (8) and the sample pressure ring (20) are respectively provided with water passage holes for drainage during the pushcore sampling and pressing process. The sampling tube cap (8) is provided with a sealing device for sealing the water passage holes on the sample pressure ring (20) during the pushcore sampling and lifting process. The sediment stratification and segmentation mechanism includes a pressure rod (29), a lead screw mechanism (30), a follower mechanism (31), a pushcore placement bucket (32), a placement bucket fixing plate (33), a protrusion (3401), a sample plate (35), a sample storage box (36), support legs (37), a lead screw drive device (39), and a turntable drive device (40). Multiple support legs (37) are installed on the outer edge of the sample plate (35). The sample storage box (36) is located below the sample plate (35) and is sealed and rotatably connected to it. Multiple sample boxes (3601) are arranged along the circumferential direction on the sample storage box (36). The pushcore placement bucket (32) is fixed on the sample plate (35). The pushcore sampled is placed into the pushcore placement bucket (32). The sample plate (35) has a corresponding pushcore placement bucket (32). The part of 32) is a through hole, and a cutting mesh (3603) is provided below the through hole. The cutting mesh (3603) is located between the sample plate (35) and the sample storage box (36). The lead screw mechanism (30), the lead screw drive device (39) and the turntable drive device (40) are respectively installed on the sample plate (35). The lead screw drive device (39) drives the follower mechanism (31) to rise and fall through the lead screw mechanism (30). One end of the pressure rod (29) is rotatably installed on the follower mechanism (31). The placement bucket fixing plate (33) is fixed on the pushcore placement bucket (32). The pressure rod (29) and the protrusion (3401) provided on the placement bucket fixing plate (33) are always in contact. During the descent of the follower mechanism (31), the protrusion (3401) is used to achieve the flipping. The other end of the pressure rod (29) is pressed on the gripper column (3) of the pushcore after flipping.

2. The pushcore-based in-situ layered stationary sediment sampler of claim 1, wherein: The middle part of the sample pressure ring (20) is threadedly connected to the other end of the slide column (7). The water passage hole on the sample pressure ring (20) is an internal water passage hole (23). There are multiple internal water passage holes (23), which are evenly opened in the circumferential direction of the middle part of the threaded connection between the sample pressure ring (20) and the slide column (7). The outer edge of the sample pressure ring (20) is provided with a limiting block groove (21) and a sealing ring groove. The limiting device is housed in the limiting block groove (21) and can move radially back and forth relative to the sampling tube cap (8). The sealing ring groove contains an O-ring (24) that seals with the inner wall of the sampling tube (26).

3. The pushcore-based in-situ layered stationary sediment sampler of claim 2, wherein: The sample pressure ring (20) is in the shape of an inverted "T". The vertical side of the "T" has an axial hole in the middle, and the hole wall is provided with a fixing thread (22) for threaded connection with the other end of the sliding column (7). The bottom of the hole is provided with a limiting plate (25) for limiting the sliding column (7). Each of the internal water passage holes (23) is opened on the vertical side of the "T" and located on the periphery of the central hole, penetrating the sample pressure ring (20) axially. The sealing ring groove is opened on the outer side of the horizontal side of the "T". A limiting block groove (21) is formed between the horizontal side and the vertical side of the "T".

4. The pushcore-based in-situ layered stationary sediment sampler of claim 1, wherein: The limiting device includes a limiting block (12), a compression spring (14), and a limiting bolt (10). The limiting bolt (10) is installed on the sampling tube cap (8). The limiting block (12) includes a limiting movable column (15) and a limiting movable block (16). One side of the limiting movable block (16) is fixed to the limiting movable column (15) or is an integral structure. The other side of the limiting movable block (16) is provided with a blind hole (13). One end of the compression spring (14) is inserted into the blind hole (13), and the other end of the compression spring (14) abuts against the limiting bolt (10). The sampling tube cap (8) is provided with a limiting groove (11) for the limiting block (12) to move radially back and forth. The two ends of the limiting groove (11) are respectively opened to the opposite outer surfaces of the sampling tube cap (8).

5. The pushcore-based in-situ layered stationary sediment sampler of claim 4, wherein: The limiting movable block (16) is square, the limiting movable column (15) is cylindrical, the limiting groove (11) on the sampling tube lock cap (8) corresponding to the limiting movable block (16) is elongated, used to put the limiting block (12) into the sampling tube lock cap (8), the limiting groove (11) on the sampling tube lock cap (8) corresponding to the limiting movable column (15) is round, and the end of the limiting movable column (15) extends out of the round hole under the action of the compression spring (14).

6. The pushcore-based in-situ layered stationary sediment sampler of claim 1, wherein: The sealing device includes a spring (17), a hard nylon ring (18), and a soft sealing ring (19). The hard nylon ring (18) and the soft sealing ring (19) are arranged from bottom to top on the top of the sample pressure ring (20). The other end of the sliding column (7) is passed through the hard nylon ring (18) and the soft sealing ring (19), respectively. The spring (17) is sleeved on the other end of the sliding column (7). One end of the spring (17) is fixed inside the sampling tube cap (8), and the lower end of the spring (17) abuts against the soft sealing ring (19).

7. The pushcore-based in-situ layered stationary depositional sampler of claim 1, wherein: The sampling tube cap (8) is a hollow structure with an open lower end and a stepped hole in the middle. The water passage on the sampling tube cap (8) is the upper water passage (9). There are multiple upper water passages (9), which are evenly opened around the stepped hole along the circumference and are connected to the inside of the sampling tube cap (8).

8. The pushcore-based in-situ layered stationary sediment sampler of claim 1, wherein: The gripper column (3) is provided with a sliding column fixing plug (6) inside. The outer side of the gripper column (3) and one end of the sliding column (7) are provided with fixing holes (4). One end of the sliding column (7) is inserted into the sliding column fixing plug (6). The connection with the gripper column (3) is achieved by the fixing rod (5) inserted into the fixing hole (4) on the outer side of the gripper column (3) and one end of the sliding column (7). Multiple teeth (2) are evenly threaded along the circumferential direction inside the gripper column (3) around the sliding column fixing plug (6). The top of each tooth (2) is a tooth head (1) that protrudes from the gripper column (3). The tooth head (1) is a blocking member of the pressure rod (29). During the pressing of the pressure rod (29), each tooth head (1) prevents the gripper column (3) from detaching.

9. The pushcore-based in-situ layered stationary depositional sampler of claim 1, wherein: The pressure bar (29) is U-shaped, with rotating rods (2902) on both sides of the U-shape and a pressure bar column (2901) at the bottom of the U-shape. One end of the rotating rods (2902) on both sides is rotatably connected to the follower mechanism (31), and the other end of the rotating rods (2902) on both sides is connected through the pressure bar column (2901). The pressure bar column (2901) presses onto the gripper column (3) of the pushcore after the pressure bar (29) flips.

10. The pushcore-based in-situ layered stationary sediment sampler of claim 1, wherein: The lead screw mechanism (30) includes a support end gear (3001), a mounting base (3002), a lead screw (3003), and a nut seat (3004). The lead screw drive device (39) includes a meshing gear (3901) and a lead screw motor (3902). The lead screw motor (3902) is fixed on the sample plate (35). The meshing gear (3901) is connected to the output shaft of the lead screw motor (3902). The mounting base (3002) is fixed on the placement bucket fixing plate (33). The lower end of the lead screw (3003) is rotatably mounted on the sample plate (35), and the upper end of the lead screw (3003) is rotatably connected to the mounting base (3002). The support end gear (3001) is mounted on the lead screw (3003) and is linked with the lead screw (3003). The support end gear (3001) meshes with the meshing gear (3901) for transmission. A nut seat (3004) is threaded onto the lead screw (3003), and the nut seat (3004) is connected to the follower mechanism (31).

11. The pushcore-based in-situ sediment stratification and fixation sampler according to claim 1, characterized in that: The follower mechanism (31) includes a rotating rod stop (3101) and a follower support frame (3103). The follower support frame (3103) is U-shaped. Both ends of the U-shaped opening are provided with rotating holes (3102) for rotating connection with the pressure rod (29). Both ends of the U-shaped opening are provided with rotating rod stops (3101) for limiting the flipping of the pressure rod (29). The bottom of the U-shape is provided with a nut seat fixing hole (3104) for connecting with the lead screw mechanism (30).

12. The pushcore-based in-situ layered stationary depositional sampler of claim 1, wherein: The pushcore placement container (32) is a hollow cylinder with open ends. The top inner wall of the pushcore placement container (32) is a guide surface (3201) that slopes inward from top to bottom. The guide surface (3201) squeezes the limiting device during the process of the pushcore being placed into the pushcore placement container (32), thereby causing the limiting device to move radially inward on the sampling tube cap (8) and release the restriction on the sample pressure ring (20). Below the guide surface (3201) is a pushcore support platform (3202) for supporting the sampling tube cap (8). After the pushcore is placed into the pushcore placement container (32), the pushcore support platform (3202) is flush with the lower edge of the sampling tube cap (8).

13. The pushcore-based in-situ layered stationary depositional sampler of claim 1, wherein: The two sides of the barrel fixing plate (33) are inclined to the middle. Each side of the barrel fixing plate (33) is provided with a barrel side support plate (34). One end of the barrel side support plate (34) is fixed to the barrel fixing plate (33), and the other end of the barrel side support plate (34) is provided with a protrusion (3401).

14. The pushcore-based in-situ layered stationary depositional sampler of claim 1, wherein: The sample plate (35) and the sample storage box (36) are connected by a T-shaped rotating rod (44). The horizontal T-shaped edge of the T-shaped rotating rod (44) is located above the sample plate (35). A gear pressure plate (42) is placed on the horizontal T-shaped edge. The gear pressure plate (42) is fixed to the sample plate (35) by a pressure plate screw (45), thereby pressing the T-shaped rotating rod (44) and the sample plate (35) together. The vertical T-shaped end of the T-shaped rotating rod (44) protrudes from the sample storage box (36) and is threadedly connected to the lifting cap (46). A turntable meshing gear is rotatably installed on the vertical T-shaped edge. 43) The turntable meshing gear (43) is fixedly connected to the sample storage box (36) by the sample slot fixing bolt (47); the turntable drive device (40) includes a turntable motor (4001) and a turntable motor gear (4003). The turntable motor (4001) is fixed on the sample plate (35). The turntable motor shaft (4002) of the turntable motor (4001) is connected to the turntable motor gear (4003). The turntable motor gear (4003) and the turntable meshing gear (43) are both located between the sample plate (35) and the sample storage box (36) and mesh with each other for transmission.

15. The pushcore-based in-situ layered stationary depositional sampler of claim 1, wherein: The sample storage box (36) is disc-shaped with a turntable (3604) in the center. Multiple sample boxes (3601) are evenly arranged around the turntable (3604) along its circumference. Each sample box (3601) contains a fixative liquid. Each sample box (3601) has a sealing groove (3602) around its periphery. The sealing groove (3602) contains a sealing ring for sealing with the sample plate (35), thus achieving sealing during the rotation of the sample storage box (36). The sample plate ( The sample plate (35) is equipped with multiple rollers (3502), which roll in contact with the turntable (3604). The sample plate (35) is also provided with a number of holes corresponding to the sample boxes (3601). Each group of holes includes a fixative injection hole (3501) and a pressure relief hole (3503). The fixative injection hole (3501) injects fixative into the corresponding sample box (3601), and the pressure relief hole (3503) is used to relieve pressure in the sample box (3601).

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