A marine sediment sampling device

Abstract

This invention discloses a marine sediment sampling device, belonging to the field of marine sediment sampling technology. The device includes a base, a sleeve connected to the top of the base, a sampling tube movably connected inside the sleeve, a telescopic push rod between the top of the sampling tube and the inner wall of the sleeve, a recessed hole on the base that mates with the sampling tube, a sealing assembly on the base for sealing the recessed hole, the sealing assembly movably abutting against the bottom of the sampling tube, a piston slidably connected inside the sampling tube, a one-way valve on the piston, a first elastic element between the piston and the top of the sampling tube, a positioning assembly for positioning the piston inside the sampling tube, and an anti-drop mechanism inside the sampling tube, with a dividing assembly connected to the outside of the anti-drop mechanism. This invention has a simple structure, is easy to operate, and prevents sample loss during the lifting process of the sampling tube, effectively retaining the sample in the sampling tube, resulting in a high sampling success rate and sampling rate.

Description

Technical Field

[0001] This invention relates to the field of marine sediment sampling technology, and more particularly to a marine sediment sampling device. Background Technology

[0002] The ocean has existed on Earth for 4 billion years. Over this vast geological time, materials carried into the ocean by terrestrial rivers and the atmosphere—including silt, dust, plant and animal remains, cosmic dust, and substances deposited on the seabed by human activities—have accumulated to an uncountable amount over time. Scientifically, these materials are collectively known as seabed sediments. Seabed sediments are categorized into: terrestrial margin materials, biological materials, volcanic materials, dissolved seabed rocks, and cosmic materials. The study of deep-sea sediments is crucial for the development of authigenic mineral resources, paleoceanography, and paleoclimatology. Therefore, the study of deep-sea sediments is receiving increasing attention.

[0003] The lower end of existing acrylic sampling tubes is not sealed, and sampling is generally conducted by maintaining negative pressure inside the tube. However, when the collected sediment is extracted from the sediment layer, the sample collected inside the tube may adhere to the sediment inside the sampling layer, causing the sample inside the tube to detach during the extraction process. Furthermore, after the sediment is extracted from the sediment layer, it is prone to leakage due to water erosion or other external forces, affecting the sample quality. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a marine sediment sampling device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A marine sediment sampling device includes a base, a sleeve connected to the top of the base, a sampling tube movably connected inside the sleeve, a telescopic push rod disposed between the top of the sampling tube and the inner wall of the sleeve, a recessed hole on the base that mates with the sampling tube, a sealing assembly on the base for sealing the recessed hole, the sealing assembly movably abutting against the bottom of the sampling tube, a piston slidably connected inside the sampling tube, a one-way valve disposed on the piston, a first elastic element disposed between the piston and the top of the sampling tube, a positioning assembly for positioning the piston disposed inside the sampling tube, an anti-detachment mechanism disposed inside the sampling tube, a dividing assembly connected to the outside of the anti-detachment mechanism, and the dividing assembly movably connected to the lower side of the sampling tube.

[0007] The anti-drop mechanism includes a drive motor fixed inside the sampling tube, the output end of the drive motor is connected to a rotating rod rotatably disposed inside the sampling tube, a plurality of first take-up rollers are disposed on the rotating rod, and a first pull rope is wound and connected to the first take-up rollers. The anti-drop mechanism also includes a working groove opened inside the sampling tube, an anti-drop plate is elastically disposed inside the working groove, and the bottom of the anti-drop plate is connected to the end of the first pull rope away from the first take-up roller.

[0008] The sampling tube has a sliding groove that communicates with the working groove. A slider connected to the anti-drop plate is slidably connected in the sliding groove. A third elastic element is provided between the slider and the inner wall of the sliding groove.

[0009] The segmentation assembly includes a rotating shaft rotatably connected to the sampling tube, a torsion spring disposed between the rotating shaft and the sampling tube circumferentially, a driven gear disposed on the rotating shaft, a half gear disposed on the rotating rod meshing with the driven gear, and an arc-shaped cutter connected to a rod body located outside the sampling tube on the rotating shaft, the arc-shaped cutter being movably disposed at the bottom of the sampling tube.

[0010] Preferably, the sealing assembly includes movable grooves on both sides of the base, two movable grooves are symmetrically arranged on both sides of the concave hole and connected to the concave hole, a sealing plate that slidably abuts against the sampling tube is slidably connected in each movable groove, a second elastic element is provided between the sealing plate and the inner wall of the movable groove, and the ends of the two sealing plates away from the second elastic element abut against each other, and a compression slope is provided on the top of the sealing plate.

[0011] Preferably, the bottom of the sampling tube is rotatably connected to a first roller via a first pin, the first roller abutting against the squeezing inclined surface of the sealing plate, and the side of the sealing plate away from the second elastic element is rotatably connected to a second roller via a second pin, the second roller abutting against the outer wall of the sampling tube.

[0012] Preferably, the positioning component includes a positioning groove formed on the sampling tube, a positioning block slidably connected in the positioning groove, a fourth elastic element disposed between the positioning block and the inner wall of the positioning groove, an inclined surface disposed at the end of the positioning block away from the fourth elastic element, and a positioning hole that cooperates with the positioning block on the piston.

[0013] Preferably, a second take-up roller is provided on the rotating rod, and a second pull rope is wound and connected to the second take-up roller. The end of the second pull rope away from the second take-up roller is connected to a positioning block. The positioning block includes a first block connected to a fourth elastic element and a second block that moves against the piston. A fifth elastic element is provided between the first block and the second block.

[0014] Preferably, the bottom of the piston is provided with a conical curved surface, the one-way valve is placed at the top of the conical curved surface, the top of the sampling tube is provided with a through hole, and the outer side of the sleeve is provided with a strip groove.

[0015] Preferably, the telescopic push rod is an electric push rod, a hydraulic push rod, or a pneumatic push rod, and an elastic telescopic rod is provided between the telescopic push rod and the sampling tube, with a vibrator provided on the elastic telescopic rod.

[0016] Compared with the prior art, the present invention provides a marine sediment sampling device, which has the following beneficial effects:

[0017] 1. This marine sediment sampling device controls the operation of an anti-detachment mechanism, which drives the segmentation component to move. When the anti-detachment mechanism is working, it can generate resistance to the sample collected inside the sampling tube, reducing the possibility of the sample sliding down inside the sampling tube. In addition, the segmentation component can separate the sediment collected inside the sampling tube from the sediment in the sediment layer, avoiding the situation where the sample inside the sampling tube falls off due to the sample sticking to the sediment layer during the lifting process.

[0018] 2. This marine sediment sampling device, by setting a sealing component on the base, allows the bottom of the sampling tube to be sealed and blocked after the sampling tube has taken a sample and left the sediment layer, so as to prevent the sediment collected in the sampling tube from being washed away by water or other external forces and causing the sample to leak out.

[0019] 3. The marine sediment sampling device connects the anti-detachment mechanism and the positioning block via a second pull rope, which resets the anti-detachment mechanism. After the restriction on the sediment in the sampling tube is lifted, the second pull rope can pull the positioning block to move, so that the positioning block no longer restricts the piston. Under the elastic force of the first elastic element, the piston pushes the sediment collected in the sampling tube, making it easier to remove the collected sediment from the sampling tube and improving the work efficiency of the staff. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 For the present invention Figure 2 A partially enlarged structural diagram of section A in the middle;

[0023] Figure 4 This is a schematic diagram of the bottom structure of the sampling tube of the present invention;

[0024] Figure 5 This is a schematic cross-sectional view of the sampling tube of the present invention;

[0025] Figure 6 For the present invention Figure 5 A partially enlarged structural diagram of section B in the middle;

[0026] Figure 7 For the present invention Figure 5 A partially enlarged structural diagram of section C in the middle;

[0027] Figure 8 This is a schematic diagram of the anti-detachment mechanism of the present invention.

[0028] In the diagram: 1. Base; 101. Recessed hole; 2. Sleeve; 201. Strip groove; 3. Sampling tube; 301. Through hole; 4. Piston; 401. One-way valve; 402. Positioning hole; 403. Conical surface; 404. First elastic element; 5. Telescopic push rod; 6. Movable groove; 601. Sealing plate; 602. Second elastic element; 7. First roller; 8. Second roller; 9. Rotating rod; 901. First take-up roller; 9011. First pull rope; 902. Second take-up roller; 9021 10. Second pull rope; 11. Half gear; 12. Drive motor; 13. Working groove; 14. Anti-fall plate; 15. Slide groove; 16. Sliding block; 17. Third elastic element; 18. Rotating shaft; 19. Driven gear; 10. Arc cutter; 11. Torsion spring; 12. Positioning groove; 13. Positioning block; 14. First block; 15. Second block; 16. Fifth elastic element; 17. Fourth elastic element; 18. Elastic telescopic rod; 19. Vibrator. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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. Example

[0032] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8 A marine sediment sampling device includes a base 1, a sleeve 2 connected to the top of the base 1, a sampling tube 3 movably connected inside the sleeve 2, a telescopic push rod 5 provided between the top of the sampling tube 3 and the inner wall of the sleeve 2, a recess 101 provided on the base 1 to cooperate with the sampling tube 3, a sealing assembly provided on the base 1 for sealing the recess 101, the sealing assembly movably abutting against the bottom of the sampling tube 3, a piston 4 slidably connected inside the sampling tube 3, a one-way valve 401 provided on the piston 4, a first elastic element 404 provided between the piston 4 and the top of the sampling tube 3, a positioning assembly for positioning the piston 4 provided inside the sampling tube 3, an anti-detachment mechanism provided inside the sampling tube 3, a dividing assembly connected to the outside of the anti-detachment mechanism, and the dividing assembly movably connected to the lower side of the sampling tube 3.

[0033] Specifically, after the equipment is submerged on the seabed and the base 1 is placed stably on the sediment, the telescopic push rod 5 is activated. The telescopic push rod 5 drives the sampling tube 3 to move downwards in the sleeve 2. During the downward movement of the sampling tube 3, it presses against the sealing component. The sealing component, under pressure, no longer seals the concave hole 101. The bottom of the sampling tube 3 passes through the concave hole 101 and inserts into the sediment layer. During this process, the piston 4 is pushed upwards relative to the sampling tube 3 by the reverse force of the sediment. The first elastic element 404 is compressed, and the seawater between the sediment and the piston 4 is discharged through the one-way valve 401 into the sampling chamber on the lower side of the sampling tube 3. During the sediment collection process, the sediment and the upper piston 4 form a sealed sampling chamber. After the sampling tube 3 has completed the sediment sampling, the anti-detachment mechanism is activated, causing the anti-detachment mechanism to drive the segmentation group. When the anti-drop mechanism is working, it can generate resistance to the sample collected inside the sampling tube 3, reducing the possibility of the sample sliding down inside the sampling tube 3. The dividing component can separate the sediment collected inside the sampling tube 3 from the sediment in the sediment layer, preventing the sample from falling out of the sampling tube 3 due to the sample sticking to the sediment layer during the lifting process. Then, the telescopic push rod 5 continues to move the sampling tube 3 upward relative to the base 1. When the sampling tube 3 is reset, the sealing component seals and blocks the bottom of the sampling tube 3, preventing the sample collected inside the sampling tube 3 from being washed away by water or other external forces. This makes it difficult for the sample inside the sampling tube 3 to be lost during the lifting process, effectively keeping the sample in the sampling tube 3, resulting in a high sampling success rate and sampling rate.

[0034] Reference Figure 1 , Figure 2 and Figure 3 As a preferred technical solution of the present invention, the sealing assembly includes movable grooves 6 formed on both sides of the base 1. The two movable grooves 6 are symmetrically arranged on both sides of the recessed hole 101 and are connected to the recessed hole 101. A sealing plate 601 that movably abuts against the sampling tube 3 is slidably connected in each movable groove 6. A second elastic element 602 is provided between the sealing plate 601 and the inner wall of the movable groove 6, and the ends of the two sealing plates 601 away from the second elastic element 602 movably abut against each other. A pressing slope is provided on the top of the sealing plate 601. Specifically, when the telescopic push rod 5 pushes the sampling tube 3 downward, When the sampling tube 3 is subjected to downward force, it exerts a squeezing force on the inclined surface of the sealing plate 601. The sealing plate 601 is forced to retract into the movable groove 6 to avoid the sampling tube 3. The second elastic element 602 is squeezed. When the sampling tube 3 finishes sampling, it resets. The second elastic element 602 pushes the sealing plate 601 to reset, sealing the bottom of the sampling tube 3. This prevents the sediment collected in the sampling tube 3 from being washed away by water or other external forces, thus preventing the sample from leaking out of the sampling tube 3. This makes it less likely for the sample inside the sampling tube 3 to be lost during the lifting process, and can effectively retain the sample in the sampling tube 3.

[0035] Reference Figure 2 , Figure 3 and Figure 4 As a preferred technical solution of the present invention, the bottom of the sampling tube 3 is rotatably connected to a first roller 7 via a first pin. The first roller 7 moves against the pressing inclined surface of the sealing plate 601. The side of the sealing plate 601 away from the second elastic element 602 is rotatably connected to a second roller 8 via a second pin. The second roller 8 moves against the outer wall of the sampling tube 3. Specifically, by setting the first roller 7 at the bottom of the sampling tube 3, when the bottom of the sampling tube 3 abuts against the sealing plate 601, the first roller 7 exerts a force on the sealing plate 601. When the sampling tube 3 moves downward past the sealing plate 601, the second roller 8 on the sealing plate 601 contacts the outer wall of the sampling tube 3, so that rolling friction replaces sliding friction, reducing the wear degree of the sampling tube 3 and the sealing plate 601, and improving the service life of the device.

[0036] Reference Figure 2 , Figure 5 , Figure 7 and Figure 8 As a preferred technical solution of the present invention, the anti-drop mechanism includes a drive motor 10 fixed in the sampling tube 3, the output end of the drive motor 10 is connected to a rotating rod 9 rotatably disposed in the sampling tube 3, a plurality of first take-up rollers 901 are disposed on the rotating rod 9, and a first pull rope 9011 is wound and connected to the first take-up rollers 901. The anti-drop mechanism also includes a working groove 11 opened in the sampling tube 3, an anti-drop plate 111 is elastically disposed in the working groove 11, and the bottom of the anti-drop plate 111 is connected to the end of the first pull rope 9011 away from the first take-up roller 901.

[0037] Furthermore, the sampling tube 3 has a sliding groove 12 that communicates with the working groove 11. A slider 121 connected to the anti-drop plate 111 is slidably connected in the sliding groove 12. A third elastic element 122 is provided between the slider 121 and the inner wall of the sliding groove 12.

[0038] Specifically, after the sampling tube 3 has finished sampling the sediment layer, the drive motor 10 is controlled to run, causing the output end of the drive motor 10 to drive the rotating rod 9 to rotate. The first take-up roller 901 on the rotating rod 9 releases the first pull rope 9011, and the first pull rope 9011 no longer pulls the anti-drop plate 111. The anti-drop plate 111 is reset under the elastic force of the compressed third elastic element 122. The anti-drop plate 111 is inserted obliquely into the sampling tube 3, generating resistance to the sample collected inside the sampling tube 3, reducing the possibility of the sample sliding down inside the sampling tube 3, and effectively preventing the sample from falling out inside the sampling tube 3. When it is necessary to release the resistance of the anti-drop plate 111 to the descent of the sediment inside the sampling tube 3, the drive motor 10 drives the rotating rod 9 to reverse, causing the first take-up roller 901 to take up the first pull rope 9011. The first pull rope 9011 pulls the anti-drop plate 111 to slide in the working groove 11, and the third elastic element 122 is compressed, preparing for the subsequent sampling work of the sampling tube 3.

[0039] Reference Figure 4 and Figure 8 As a preferred technical solution of the present invention, the segmentation component includes a rotating shaft 13 rotatably connected to the sampling tube 3, a torsion spring 133 circumferentially disposed between the rotating shaft 13 and the sampling tube 3, a driven gear 131 disposed on the rotating shaft 13, a half gear 903 meshing with the driven gear 131 disposed on the rotating rod 9, and an arc-shaped cutter 132 connected to the rod body of the rotating shaft 13 located outside the sampling tube 3, the arc-shaped cutter 132 being movably disposed at the bottom of the sampling tube 3; specifically, when the anti-drop mechanism is working, it will drive the segmentation component to move, and when the rotating rod 9 rotates, it causes the half gear 903 to mesh with the driven gear 131 on the rotating shaft 13 for transmission. When the half gear 903 meshes with the driven gear 131, the driven gear... 131 drives the rotating shaft 13 and the arc-shaped cutter 132 on the rotating shaft 13 to rotate, so that the arc-shaped cutter 132 can separate the sediment collected in the sampling tube 3 from the sediment in the sediment layer, avoiding the situation where the sample collected in the sampling tube 3 is stuck to the sediment layer during the lifting process, which would cause the sample inside the sampling tube 3 to fall off. When the half gear 903 is no longer meshed with the driven gear 131, the rotating shaft 13 drives the arc-shaped cutter 132 to reset and rotate under the action of the torsion spring 133, avoiding the arc-shaped cutter 132 from generating resistance to the upward movement of the sampling tube 3. The setting of the dividing component makes it difficult for the sample inside the sampling tube 3 to be lost during the lifting process, and can effectively retain the sample in the sampling tube 3, with a high sampling success rate and sampling rate.

[0040] Reference Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8 As a preferred technical solution of the present invention, the positioning component includes a positioning groove 14 opened on the sampling tube 3, a positioning block 141 slidably connected in the positioning groove 14, a fourth elastic element 142 provided between the positioning block 141 and the inner wall of the positioning groove 14, an inclined surface provided at the end of the positioning block 141 away from the fourth elastic element 142, and a positioning hole 402 that cooperates with the positioning block 141 is opened on the piston 4.

[0041] Furthermore, a second take-up roller 902 is provided on the rotating rod 9, and a second pull rope 9021 is wound and connected to the second take-up roller 902. One end of the second pull rope 9021 away from the second take-up roller 902 is connected to the positioning block 141. The positioning block 141 includes a first block 1411 connected to the fourth elastic element 142 and a second block 1412 that moves against the piston 4. A fifth elastic element 1413 is provided between the first block 1411 and the second block 1412.

[0042] Specifically, when the sampling tube 3 penetrates the sediment layer for sampling, the piston 4 is pushed upwards within the sampling tube 3 by the reverse force of the sediment. During sampling, the piston 4 compresses the second block 1412, compressing the fifth elastic element 1413. The second block 1412 avoids the piston 4. When sampling is completed, the second block 1412 is placed in the positioning hole 402 under the elastic force of the fifth elastic element 1413, restricting the position of the piston 4. When the device is removed from the water surface and the sediment sample in the sampling tube 3 needs to be taken out, the telescopic push rod 5 pushes the sampling tube 3 to move, causing the sampling tube 3 to abut against the sealing plate 601. The sealing plate 601 is then forced to move to both sides. The sampling tube 3 moves out of the recess 101, and then the anti-drop mechanism is controlled to release the resistance to the sample in the sampling tube 3. During this process, the rotating rod 9 winds the second pull rope 9021 through the second take-up roller 902, so that the second pull rope 9021 pulls the first block 1411, the fourth elastic element 142 is compressed, and the first block 1411 drives the second block 1412 away from the positioning hole 402 of the piston 4 through the fifth elastic element 1413. The piston 4 is no longer restricted and will be reset under the elastic force of the first elastic element 404. The piston 4 pushes out the sample collected in the sampling tube 3. The operation is simple and convenient, improving the work efficiency of the staff.

[0043] Reference Figure 1 , Figure 2 and Figure 5 As a preferred technical solution of the present invention, the bottom of the piston 4 is provided with a conical curved surface 403, the one-way valve 401 is placed at the top of the conical curved surface 403, the top of the sampling tube 3 is provided with a through hole 301, and the outer side of the sleeve 2 is provided with a strip groove 201. Specifically, when the bottom of the sampling tube 3 passes through the concave hole 101 and is inserted into the sediment layer for sampling, the piston 4 is pushed upward relative to the sampling tube 3 by the reverse push of the sediment, the first elastic element 404 is compressed, and the seawater between the sediment and the piston 4 is discharged from the sampling chamber on the lower side of the sampling tube 3 through the one-way valve 401. By providing a conical curved surface 403 at the bottom of the piston 4, the seawater can flow quickly along the conical curved surface 403 to the one-way valve 401, thereby increasing the discharge speed of the seawater between the sediment collected in the sampling tube 3 and the piston 4. The seawater discharged from the one-way valve 401 can be discharged to the outside of the device through the through hole 301 and the strip groove 201.

[0044] Reference Figure 1 and Figure 2As a preferred technical solution of the present invention, the telescopic push rod 5 is an electric push rod, a hydraulic push rod, or a pneumatic push rod. An elastic telescopic rod 15 is provided between the telescopic push rod 5 and the sampling tube 3, and a vibrator 16 is provided on the elastic telescopic rod 15. Specifically, the telescopic push rod 5 can be one of an electric push rod, a hydraulic push rod, or a pneumatic push rod, which facilitates pushing or pulling the sampling tube 3, reducing manual output. At the same time, the elastic telescopic rod 15 is connected between the telescopic push rod 5 and the sampling tube 3, and a vibrator 16 is provided on the elastic telescopic rod 15. When the telescopic push rod 5 pushes the sampling tube 3 downward, the vibrator 16 works, which facilitates the sampling tube 3 to quickly penetrate into the sediment layer, reduces the sampling difficulty of the sampling tube 3, and improves the sampling efficiency of the device.

[0045] 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 marine sediment sampling device, comprising a base (1), characterized in that, The top of the base (1) is connected to a sleeve (2), and a sampling tube (3) is movably connected inside the sleeve (2). A telescopic push rod (5) is provided between the top of the sampling tube (3) and the inner wall of the sleeve (2). A recessed hole (101) is provided on the base (1) to cooperate with the sampling tube (3). A sealing component for sealing the recessed hole (101) is provided on the base (1). The sealing component is movably abutted against the bottom of the sampling tube (3). A piston (4) is slidably connected inside the sampling tube (3). A one-way valve (401) is provided on the piston (4). A first elastic element (404) is provided between the piston (4) and the top of the sampling tube (3). A positioning component for positioning the piston (4) is provided inside the sampling tube (3). An anti-dropping mechanism is also provided inside the sampling tube (3). A dividing component is connected to the outside of the anti-dropping mechanism. The dividing component is movably connected to the lower side of the sampling tube (3). The anti-dropping mechanism includes a drive motor (10) fixed inside the sampling tube (3), the output end of the drive motor (10) is connected to a rotating rod (9) rotatably disposed inside the sampling tube (3), a plurality of first take-up rollers (901) are disposed on the rotating rod (9), and a first pull rope (9011) is wound and connected to the first take-up rollers (901). The anti-dropping mechanism also includes a working groove (11) opened inside the sampling tube (3), an anti-dropping plate (111) is elastically disposed inside the working groove (11), and the bottom of the anti-dropping plate (111) is connected to the end of the first pull rope (9011) away from the first take-up roller (901). The sampling tube (3) has a sliding groove (12) that communicates with the working groove (11). A slider (121) that is connected to the anti-drop plate (111) is slidably connected in the sliding groove (12). A third elastic element (122) is provided between the slider (121) and the inner wall of the sliding groove (12). The segmentation assembly includes a rotating shaft (13) rotatably connected to the sampling tube (3), a torsion spring (133) circumferentially connected between the rotating shaft (13) and the sampling tube (3), a driven gear (131) on the rotating shaft (13), a half gear (903) meshing with the driven gear (131) on the rotating rod (9), and an arc-shaped cutter (132) connected to the rod body outside the sampling tube (3) on the rotating shaft (13), and the arc-shaped cutter (132) is movably disposed at the bottom of the sampling tube (3).

2. The marine sediment sampling device according to claim 1, characterized in that, The sealing assembly includes movable grooves (6) on both sides of the base (1). The two movable grooves (6) are symmetrically arranged on both sides of the recess (101) and connected to the recess (101). A sealing plate (601) that movably abuts against the sampling tube (3) is slidably connected in each movable groove (6). A second elastic element (602) is provided between the sealing plate (601) and the inner wall of the movable groove (6). The ends of the two sealing plates (601) that are away from the second elastic element (602) movably abut against each other. A pressing slope is provided on the top of the sealing plate (601).

3. A marine sediment sampling device according to claim 2, characterized in that, The bottom of the sampling tube (3) is rotatably connected to a first roller (7) via a first pin. The first roller (7) moves against the squeezing slope of the sealing plate (601). The side of the sealing plate (601) away from the second elastic element (602) is rotatably connected to a second roller (8) via a second pin. The second roller (8) moves against the outer wall of the sampling tube (3).

4. A marine sediment sampling device according to claim 3, characterized in that, The positioning component includes a positioning groove (14) opened on the sampling tube (3), a positioning block (141) is slidably connected in the positioning groove (14), a fourth elastic element (142) is provided between the positioning block (141) and the inner wall of the positioning groove (14), an inclined surface is provided at the end of the positioning block (141) away from the fourth elastic element (142), and a positioning hole (402) is opened on the piston (4) to cooperate with the positioning block (141).

5. A marine sediment sampling device according to claim 4, characterized in that, A second take-up roller (902) is provided on the rotating rod (9), and a second pull rope (9021) is wound and connected on the second take-up roller (902). One end of the second pull rope (9021) away from the second take-up roller (902) is connected to the positioning block (141). The positioning block (141) includes a first block (1411) connected to the fourth elastic element (142) and a second block (1412) that moves against the piston (4). A fifth elastic element (1413) is provided between the first block (1411) and the second block (1412).

6. A marine sediment sampling device according to claim 5, characterized in that, The bottom of the piston (4) is provided with a conical surface (403), the one-way valve (401) is placed on the top of the conical surface (403), the top of the sampling tube (3) is provided with a through hole (301), and the outer side of the sleeve (2) is provided with a strip groove (201).

7. A marine sediment sampling device according to claim 1, characterized in that, The telescopic push rod (5) is an electric push rod, a hydraulic push rod or a pneumatic push rod. An elastic telescopic rod (15) is provided between the telescopic push rod (5) and the sampling tube (3). A vibrator (16) is provided on the elastic telescopic rod (15).

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