Marine sediment detection sampling equipment and method thereof
By combining the reciprocating rotation of the sampling tube driven by the crank-rocker mechanism with negative pressure suction, the problem of samplers being difficult to penetrate clay and hard layers in existing technologies has been solved, thus achieving efficient marine sediment sampling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG OCEAN UNIVERSITY
- Filing Date
- 2026-03-13
- Publication Date
- 2026-04-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing column samplers have difficulty cutting smoothly into marine sediments with high clay content, and encounter significant cutting resistance in sediment strata at different depths, affecting sampling efficiency.
The sampling tube is driven to reciprocate by a crank-rocker mechanism, combined with up-and-down shaking. The sludge is sucked out through the negative pressure section, and the serrated port is used to cut the sediment. The inner rod is used to unclog the inner hole, so as to achieve efficient penetration and sampling.
It effectively disrupts sediment structure, reduces frictional resistance, improves sampling efficiency, prevents pore blockage, and ensures that the sampling tube can smoothly penetrate and efficiently sample in viscous sediments.
Smart Images
Figure CN121917286A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of sediment detection and sampling technology, specifically, it relates to a marine sediment detection and sampling device and method. Background Technology
[0002] Marine sediment sampling is a fundamental task for marine geology, environmental monitoring, and resource exploration. It aims to analyze the physical, chemical, and biological characteristics of sediments collected from the seabed surface or at a certain depth. In order to obtain samples that preserve the original stratigraphic structure information, column samplers are usually used during the operation. This device can extract and preserve a complete sediment "column" profile by vertically inserting a long tube into the seabed sediment, thereby providing key evidence for studying sedimentary history, vertical distribution of pollutants, and other related information.
[0003] Although existing column samplers may be equipped with vibration devices at the top to improve sampling efficiency and attempt to temporarily liquefy sediment particles through high-frequency vibration, thereby reducing the frictional resistance between the tube wall and the sediment, this auxiliary method has obvious limitations in practical applications. When the sludge (clay) content in the sediment is high, its unique viscosity characteristics cause the vibration energy to decay rapidly in the viscous medium, making it difficult for the tube to cut smoothly. At the same time, sediment strata at different depths often contain a small amount of gravel or dense hard layers. These particulate materials not only further increase the cutting resistance at the tube opening, but also cause the sampler relying solely on vibration to face a serious problem of insufficient downforce, which will affect the sampling efficiency of the sediment. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a marine sediment detection and sampling device that can overcome or at least partially solve the above problems.
[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A marine sediment sampling and detection device includes a device box, a sampling tube located at the bottom of the device box, and a support column rotatably installed inside the device box. The device box contains a drive unit for reciprocating rotation of the support column. A mounting hole is provided at the bottom of the support column, and a connecting column is longitudinally slidably installed in the mounting hole. The sampling tube is installed at the bottom of the connecting column, and when the support column reciprocates, the connecting column reciprocates within the mounting hole.
[0006] In order to enable the sampling tube to reciprocate, preferably, the driving unit includes a motor fixedly installed in the device box, a disk fixedly installed on the output shaft of the motor, an eccentrically mounted push rod rotatably installed on the disk, and the other end of the push rod eccentrically rotatably connected to a support column. The disk, push rod and support column together constitute a crank-rocker mechanism.
[0007] To enable the sampling tube to vibrate, an annular plate is fixedly installed on the outer wall of the connecting column, and a circumferentially distributed lower protrusion is fixedly installed on the annular plate. An circumferentially distributed upper protrusion is fixedly installed on the device box. When the connecting column reciprocates with the support column, the annular plate drives the upper protrusion to slide back and forth over the lower protrusion. A first spring is installed between the connecting column and the inner top of the mounting hole.
[0008] To facilitate the disassembly and assembly of the sampling tube, preferably, the upper outer wall of the sampling tube is provided with an annular groove, the bottom of the connecting column is provided with a sleeve hole, the upper end of the sampling tube is fitted into the sleeve hole, the outer wall of the connecting column is provided with a device hole, an L-shaped plate is slidably installed in the device hole, one end of the L-shaped plate is inserted into the annular groove, and a second spring is installed between the other end of the L-shaped plate and the outer wall of the connecting column.
[0009] To improve the sampling efficiency of the sampling tube, preferably, the lower end of the sampling tube has multiple circumferentially distributed first openings, and the lower end of the sampling tube forms a serrated port under the action of the multiple first openings.
[0010] In order to extract some sludge from the lower end of the sampling tube, the lower end of the sampling tube is further provided with multiple circumferentially distributed inner holes, and the connecting column is provided with a negative pressure part that generates negative pressure inside the inner holes.
[0011] To generate negative pressure within the inner bore, the negative pressure section further includes a mounting bracket connected to a connecting column, on which a negative pressure pipe is rotatably mounted. A fan blade is installed inside the negative pressure pipe, and the air inlet end of the negative pressure pipe is connected to the upper end of the inner bore. A driven gear is mounted on the outer wall of the negative pressure pipe via a one-way bearing, and a ring gear meshing with the driven gear is mounted on the lower end of the device box.
[0012] To further prevent the inner hole from being blocked, the upper outer wall of the sampling tube is fixedly connected to a device box that communicates with the upper port of the inner hole. The air inlet end of the sampling tube is connected to a flexible tube, and a short tube is connected to the device box. The end of the flexible tube is inserted into the short tube. An inner rod is provided inside the inner hole, and the upper end of the inner rod is movably installed inside the device box.
[0013] To further enhance the vibration amplitude of the inner rod, a vertical rod is fixedly installed inside the device box, a counterweight is slidably installed on the vertical rod, the upper end of the inner rod is fixedly connected to the counterweight, and a third spring is installed between the counterweight and the inner top of the device box.
[0014] A method for using a marine sediment sampling and detection device includes the following steps: S1. Insert the sampling tube vertically into the marine sediment; S2. Rotate the sampling tube back and forth, with the rotation range between 15° and 45°. S3. During the reciprocating rotation of the sampling tube, make the sampling tube shake up and down; S4. Remove the portion of sludge that is in contact with the lower end of the sampling tube; S5. When the sampling tube reaches the preset depth, stop the sampling tube and pull it out of the marine sediment. S6. Remove the sampling tube and pour out the sediment in the sampling tube.
[0015] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. This invention drives the sampling tube to rotate back and forth through a crank-rocker mechanism, causing its bottom end to generate a bidirectional torsional shear effect in the sediment, which can effectively destroy the sediment structure, reduce the frictional resistance of the tube wall, and improve the sampling efficiency of marine sediments.
[0016] 2. The present invention uses the cooperation of the upper and lower protrusions and the resetting action of the first spring to make the sampling tube vibrate up and down during the reciprocating rotation. This composite motion of torsion and vibration solves the limitation of the rapid energy decay of traditional vibration devices in viscous media, thereby achieving efficient penetration and further improving the sampling efficiency of marine sediments.
[0017] 3. The present invention forms a serrated port by opening multiple circumferentially distributed trapezoidal or triangular first openings at the lower end of the sampling tube. When the sampling tube is inserted into the sediment and rotates back and forth, the serrated structure at the bottom end can continuously cut the sediment, effectively breaking up dense or sandy strata and further reducing penetration resistance.
[0018] 4. This invention generates negative pressure in the inner hole through the negative pressure section. On the one hand, the sludge generated by the reciprocating rotation cutting is continuously sucked out through the lower port, effectively preventing the sludge from accumulating in the annular hole at the bottom of the sampling tube, thereby reducing the penetration resistance. On the other hand, the negative pressure environment at the lower port will form a downward adsorption force, providing additional downward pressure for the sampling tube. In addition, the downward reaction force generated when the negative pressure tube is tilted upward to exhaust air further enhances the downward pressure of the sampling tube, significantly improving its penetration ability in viscous sediments.
[0019] 5. This invention features an inner rod installed inside the inner hole, with its upper end fixedly connected to a counterweight inside the device box. When the sampling tube vibrates up and down, the sampling tube causes the device box to vibrate synchronously. The counterweight, in conjunction with a third spring, causes the inner rod to vibrate up and down within the inner hole, effectively clearing the inner hole and preventing it from being blocked by sludge. Simultaneously, when the bottom of the inner rod extends out of the lower end of the inner hole, it inserts into the sediment. When it moves upward to reset, it is pulled out from the sediment, making the sediment below the sampling tube looser and accelerating the downward pressure speed of the sampling tube.
[0020] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description
[0021] In the attached diagram: Figure 1 This is a three-dimensional structural diagram of a marine sediment detection and sampling device proposed in this invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of a marine sediment detection and sampling device proposed in this invention. Figure 2 ; Figure 3 This is a schematic diagram of the isometric cross-sectional structure of a marine sediment detection and sampling device proposed in this invention; Figure 4 This is a schematic diagram of a partial front view section of a marine sediment detection and sampling device proposed in this invention; Figure 5 This is a partial isometric structural diagram of a marine sediment detection and sampling device proposed in this invention; Figure 6 This invention proposes a marine sediment detection and sampling device. Figure 4 Schematic diagram of part A in the middle; Figure 7 This is a partial structural diagram of the sampling tube of a marine sediment detection and sampling device proposed in this invention; Figure 8 This is a schematic diagram of the support column and negative pressure pipe structure of a marine sediment detection and sampling device proposed in this invention; Figure 9 This is a schematic diagram of the device box structure of a marine sediment detection and sampling equipment proposed in this invention.
[0022] In the diagram: 1. Device box; 2. Sampling tube; 3. Support column; 4. Motor; 5. Disc; 6. Push rod; 7. Mounting hole; 8. Connecting column; 9. First spring; 10. Annular plate; 11. Lower protrusion; 12. Upper protrusion; 13. L-shaped plate; 14. Second spring; 15. Device hole; 16. Sleeve hole; 17. Inner hole; 18. Device box; 19. Flexible hose; 20. Negative pressure pipe; 21. Fan blade; 22. Driven gear; 23. Ring gear; 24. Inner rod; 25. Counterweight; 26. Vertical rod; 27. Third spring; 28. First opening; 29. Second opening; 30. Short pipe; 31. Column; 32. Hanging ring; 33. Mounting bracket; 34. Drainage pipe; 35. Branch pipe; 36. Annular slot. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0024] Example 1: Refer to Figures 1-9 As shown, a marine sediment detection and sampling device includes a device box 1. A cylindrical sampling tube 2 is provided at the bottom of the device box 1. The sampling tube 2 is used to complete the sampling of marine sediments, and a drain pipe 34 is connected to the top. A solenoid valve is installed in the drain pipe 34. The device box 1 also includes a support column 3 rotatably installed in the device box 1. The device box 1 is provided with a drive unit that drives the support column 3 to reciprocate. The drive unit includes a motor 4 fixedly installed in the device box 1. A disc 5 is fixedly installed on the output shaft of the motor 4. An eccentrically set push rod 6 is rotatably installed on the disc 5. The other end of the push rod 6 is eccentrically rotatably connected to the support column 3. The disc 5, the push rod 6 and the support column 3 are combined to form a crank-rocker mechanism, wherein the disc 5, the push rod 6 and the support column 3 are respectively equivalent to the crank, the connecting rod and the rocker in the crank-rocker mechanism.
[0025] When in use, the lower end of the sampling tube 2 needs to be inserted into the marine sediment, and then the motor 4 is started. The motor 4 will drive the disc 5 to rotate. The disc 5 will drive the sampling tube 2 to rotate back and forth through the push rod 6 using the principle of a crank-rocker mechanism. The bottom of the sampling tube 2 will then rotate back and forth in the sediment, causing the bottom of the sampling tube 2 to generate a bidirectional torsional shear effect in the sediment. This can effectively destroy the sediment structure and reduce the frictional resistance of the tube wall, thereby achieving efficient penetration and improving the sampling efficiency of marine sediments.
[0026] Reference Figures 4-5 as well as Figures 8-9As shown, the bottom of the support column 3 is provided with a mounting hole 7. The axial cross-section of the mounting hole 7 is a regular polygon, such as a regular hexagon. A connecting column 8 is longitudinally slidably installed in the mounting hole 7. The shape of the connecting column 8 matches the shape of the mounting hole 7. The sampling tube 2 is detachably installed at the bottom of the connecting column 8. When the support column 3 rotates back and forth, the connecting column 8 moves up and down in the mounting hole 7. The specific structural features are as follows: An annular plate 10 is fixedly installed on the outer wall of the connecting column 8, and the annular plate 10 is located below the device box 1. A circumferentially distributed lower protrusion 11 is fixedly installed on the annular plate 10, and a circumferentially distributed upper protrusion 12 is fixedly installed on the device box 1. The shape and number of the lower protrusion 11 and the upper protrusion 12 are basically the same. The cross-section of both is semi-circular, and the number is between 3 and 12, preferably 6. When the connecting column 8 rotates back and forth with the support column 3, the annular plate 10 drives the upper protrusion 12 to slide back and forth over the lower protrusion 11. A first spring 9 is installed between the connecting column 8 and the inner top of the mounting hole 7.
[0027] Specifically, during the reciprocating rotation of the support column 3, the support column 3 also drives the connecting column 8 and the sampling tube 2 to reciprocate. The connecting column 8 drives the lower protrusion 11 to swing back and forth through the annular plate 10. When the lower protrusion 11 and the upper protrusion 12 are aligned vertically, the lower protrusion 11 will be pressed by the upper protrusion 12, which will drive the annular plate 10 to move downward. The annular plate 10 will then drive the sampling tube 2 below to move downward through the connecting column 8 (the moving distance is between 1mm and 5mm). At the same time, it will stretch the first spring 9. After the lower protrusion 11 passes the upper protrusion 12, the first spring 9 will elastically return to its original position and drive the connecting column 8, the annular plate 10, and the sampling tube 2 to move upward and return to their original position. Thus, the continuously reciprocating rotation of the support column 3 will also cause the sampling tube 2 to vibrate up and down. In conjunction with the reciprocating rotation action, it can be inserted into the marine sediment more efficiently, thereby indirectly improving the sampling efficiency of the sediment.
[0028] Reference Figure 5 and Figure 9 As shown, the upper outer wall of the sampling tube 2 is provided with an annular groove 36, the bottom of the connecting column 8 is provided with a sleeve hole 16, the upper end of the sampling tube 2 is fitted into the sleeve hole 16, the outer wall of the connecting column 8 is provided with a device hole 15, an L-shaped plate 13 is slidably installed in the device hole 15, one end of the L-shaped plate 13 is inserted into the annular groove 36, and a second spring 14 is installed between the other end of the L-shaped plate 13 and the outer wall of the connecting column 8.
[0029] After sampling, pull one end of the L-shaped plate 13 to pull the other end of the L-shaped plate 13 out of the annular slot 36, and then pull the sampling tube 2 out of the sleeve hole 16 to disassemble the sampling tube 2. Conversely, when it is necessary to fix the sampling tube 2 into the sleeve hole 16, pull one end of the L-shaped plate 13 again, and then insert the top of the sampling tube 2 into the sleeve hole 16. Then release the L-shaped plate 13, and the second spring 14 will pull the L-shaped plate 13 to slide back to its original position in the device hole 15, and insert the end of the L-shaped plate 13 into the annular slot 36 to fix the sampling tube 2.
[0030] In practice, in order to improve the stability of the sampling tube 2, two sets of L-shaped plates 13 can be set, and they are located on both sides of the connecting column 8 respectively.
[0031] Reference Figures 1-3 As shown, a column 31 is fixedly connected to the top of the device box 1, and a hanging ring 32 is fixedly connected to the top of the column 31. When in use, the hoisting rope can be fixed to the hanging ring 32 to facilitate the sampling operation of the staff in the deep water area.
[0032] Example 2: Refer to Figures 3-7 As shown, a marine sediment detection and sampling device is basically the same as that in Example 1, but with a further improvement: The sampling tube 2 has multiple circumferentially distributed first openings 28 at its lower end. The shape of the first openings 28 is trapezoidal or triangular. The lower end of the sampling tube 2 forms a sawtooth port under the action of the multiple first openings 28.
[0033] Specifically, when the sampling tube 2 is inserted into the sediment and rotates back and forth, the serrated structure at its bottom end can continuously cut the sediment, effectively breaking up dense or sandy strata, further reducing penetration resistance, thereby improving the penetration ability and operational efficiency of the sampling tube 2 in different types of sediments.
[0034] Reference Figure 7 As shown, the lower end of the sampling tube 2 has a second opening 29, which is connected to the lower port of the inner hole 17. Therefore, when the sampling tube 2 rotates back and forth, the sludge generated is more likely to enter the inner hole 17 through the second opening 29, which can increase the gap between the outer wall of the sampling tube 2 and the sediment.
[0035] Reference Figure 4 , Figure 6 as well as Figure 7 As shown, the lower end of the sampling tube 2 has multiple circumferentially distributed inner holes 17, and the connecting column 8 has a negative pressure part that generates negative pressure inside the inner holes 17.
[0036] After the sampling tube 2 is inserted into the sediment, a negative pressure is generated in its inner hole 17 through the negative pressure section. This negative pressure continuously sucks up the sludge generated by the reciprocating rotation cutting through the lower port, effectively preventing the sludge from accumulating in the annular hole at the bottom of the sampling tube 2, thereby reducing the penetration resistance. On the other hand, the negative pressure environment at the lower port will form a downward adsorption force, providing additional downward pressure for the sampling tube 2. Through the above dual effects, the penetration ability and sampling efficiency of the sampling tube 2 in viscous sediment can be significantly improved.
[0037] Example 3: Reference Figures 3-5 as well as Figure 8 As shown, a marine sediment detection and sampling device is basically the same as that in Example 2, but with a further improvement: The aforementioned negative pressure section includes a mounting bracket 33 connected to the connecting column 8. A negative pressure pipe 20 is rotatably mounted on the mounting bracket 33. Multiple negative pressure pipes 20 are provided and distributed around the connecting column 8. A fan blade 21 is installed inside the negative pressure pipe 20. The air inlet end of the negative pressure pipe 20 is connected to the upper end of the inner hole 17. A driven gear 22 is mounted on the outer wall of the negative pressure pipe 20 through a one-way bearing. A ring gear 23 that meshes with the driven gear 22 is installed at the lower end of the device box 1.
[0038] Specifically, when the connecting column 8 reciprocates, it will also drive the negative pressure pipe 20 to swing back and forth through the mounting bracket 33. The negative pressure pipe 20 will drive the driven gear 22 to roll back and forth on the ring gear 23. The driven gear 22 will then rotate back and forth. Due to the action of the one-way bearing, the negative pressure pipe 20 will rotate intermittently in a directional manner. When the negative pressure pipe 20 rotates, it will drive the internal fan blade 21 to rotate synchronously, and cause one end of the negative pressure pipe 20 to exhaust air while the other end to draw in air. When drawing in air, it will draw in air to the upper end of the inner hole 17, causing the inner hole 17 to suck in sludge. When exhausting air, it will discharge the sludge from the other end, thereby completing the sludge extraction action.
[0039] In practice, the negative pressure pipe 20 is inclined around the connecting column 8, and the exhaust end of the negative pressure pipe 20 is inclined upward. Therefore, when the negative pressure pipe 20 discharges sludge upward, it will generate a downward reaction force, which will generate additional downward pressure on the sampling pipe 2. This will improve the efficiency of the sampling pipe 2 in inserting into the sediment, and the discharged sludge will not impact the surrounding area of the sampling site. This can prevent the surrounding sediment from being stirred up and ensure the integrity of the sampling environment.
[0040] Example 4: Reference Figures 4-7 As shown, a marine sediment detection and sampling device is basically the same as that in Example 3, but with a further improvement: The upper outer wall of the sampling tube 2 is fixedly connected to a device box 18 that communicates with the upper port of the inner hole 17. The air inlet end of the sampling tube 2 is connected to a rubber hose 19. A short pipe 30 is connected to the device box 18. The end of the hose 19 is inserted into the short pipe 30. An inner rod 24 is provided inside the inner hole 17. The upper end of the inner rod 24 is movably installed inside the device box 18.
[0041] Specifically, when the sampling tube 2 shakes up and down, it causes the inner rod 24 to shake up and down as well. The inner rod 24 can effectively clear the inner hole 17 and prevent it from being blocked by sludge. When the bottom of the inner rod 24 extends out of the lower end of the inner hole 17, it will insert into the sediment below the sampling tube 2. When the inner rod 24 moves upward and resets, it will be pulled out of the sediment. Thus, the reciprocating up and down movement of the sampling tube 2 will also cause the inner rod 24 to indirectly insert into the sediment, making the sediment below the sampling tube 2 looser, allowing the sampling tube 2 to press down faster, and making it less likely to block the inner hole 17.
[0042] In practice, in order to enhance the function of the inner rod 24, the lower end of the inner rod 24 needs to be set into an inverted triangle.
[0043] Reference Figure 5 As shown, the suction end of the negative pressure pipe 20 is also connected to a branch pipe 35. An overflow valve is installed inside the branch pipe 35. When the inner hole 17 is blocked, causing the negative pressure pipe 20 to be unable to suck up the sludge, the overflow valve will automatically open and suck up the surrounding liquid through the branch pipe 35.
[0044] Reference Figure 6 As shown, a vertical rod 26 is fixedly installed inside the device box 18. A counterweight 25 is slidably installed on the vertical rod 26. The mass of the counterweight 25 is greater than the mass of the inner rod 24. The upper end of the inner rod 24 is fixedly connected to the counterweight 25. The outer shape of the inner rod 24 is inverted L-shaped and made of thin sheet metal so that it can be set inside the inner hole 17. A third spring 27 is installed between the counterweight 25 and the inner top of the device box 18.
[0045] Specifically, when the sampling tube 2 shakes up and down, the sampling tube 2 will drive the device box 18 to shake up and down synchronously. The counterweight 25 inside the device box 18 will cooperate with the third spring 27 and shake up and down on the outer wall of the vertical rod 26, which will in turn drive the inner rod 24 to shake up and down in the inner hole 17. The setting of the counterweight 25 can increase the shaking amplitude of the inner rod 24.
[0046] Example 5: Refer to Figures 1-9 As shown, a method for using a marine sediment detection and sampling device includes the following steps: S1. Insert the sampling tube 2 vertically into the marine sediment; S2. Rotate the sampling tube 2 back and forth, with the rotation range between 15° and 45°. S3. During the reciprocating rotation of sampling tube 2, make sampling tube 2 shake up and down; S4. Remove the portion of sludge that is in contact with the lower end of sampling tube 2; S5. When the sampling tube 2 reaches the preset depth, stop the operation of the sampling tube 2 and pull it out of the marine sediment. S6. Remove sampling tube 2 and pour out the sediment in sampling tube 2.
[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been described above with reference to preferred embodiments, it is not intended to limit the present invention. Any modifications or alterations made by those skilled in the art without departing from the scope of the present invention using the above-described technical content can be considered as equivalent embodiments. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.
Claims
1. A marine sediment sampling and detection device, comprising a device box (1), wherein a sampling tube (2) is disposed below the device box (1), characterized in that, Also includes: A support column (3) is rotatably installed in the device box (1). The device box (1) is provided with a drive unit that drives the support column (3) to rotate back and forth. A mounting hole (7) is opened at the bottom of the support column (3). A connecting column (8) is slidably installed in the mounting hole (7). The sampling tube (2) is installed at the bottom of the connecting column (8). When the support column (3) rotates back and forth, the connecting column (8) moves up and down in the mounting hole (7).
2. The marine sediment detection and sampling device according to claim 1, characterized in that, The drive unit includes a motor (4) fixedly installed in the device box (1). A disc (5) is fixedly installed on the output shaft of the motor (4). An eccentrically mounted push rod (6) is rotatably mounted on the disc (5). The other end of the push rod (6) is eccentrically rotatably connected to the support column (3). The disc (5), push rod (6) and support column (3) together constitute a crank rocker mechanism.
3. The marine sediment detection and sampling device according to claim 2, characterized in that, An annular plate (10) is fixedly installed on the outer wall of the connecting column (8). A lower protrusion (11) with a circular distribution is fixedly installed on the annular plate (10). An upper protrusion (12) with a circular distribution is fixedly installed on the device box (1). When the connecting column (8) reciprocates with the support column (3), the annular plate (10) drives the upper protrusion (12) to slide back and forth over the lower protrusion (11). A first spring (9) is installed between the connecting column (8) and the inner top of the mounting hole (7).
4. The marine sediment detection and sampling device according to claim 1, characterized in that, The upper outer wall of the sampling tube (2) is provided with an annular groove (36), the bottom of the connecting column (8) is provided with a sleeve hole (16), the upper end of the sampling tube (2) is sleeved in the sleeve hole (16), the outer wall of the connecting column (8) is provided with a device hole (15), an L-shaped plate (13) is slidably installed in the device hole (15), one end of the L-shaped plate (13) is inserted into the annular groove (36), and a second spring (14) is installed between the other end of the L-shaped plate (13) and the outer wall of the connecting column (8).
5. A marine sediment detection and sampling device according to claim 1, characterized in that, The lower end of the sampling tube (2) is provided with a plurality of circumferentially distributed first openings (28), and the lower end of the sampling tube (2) forms a sawtooth port under the action of the plurality of first openings (28).
6. The marine sediment detection and sampling device according to claim 1, characterized in that, The lower end of the sampling tube (2) is provided with multiple circumferentially distributed inner holes (17), and the connecting column (8) is provided with a negative pressure part that generates negative pressure in the inner holes (17).
7. A marine sediment detection and sampling device according to claim 6, characterized in that, The negative pressure section includes a mounting bracket (33) connected to the connecting column (8), a negative pressure pipe (20) is rotatably mounted on the mounting bracket (33), a fan blade (21) is installed inside the negative pressure pipe (20), and the air inlet end of the negative pressure pipe (20) is connected to the upper end of the inner hole (17); The outer wall of the negative pressure pipe (20) is fitted with a driven gear (22) via a one-way bearing, and the lower end of the device box (1) is fitted with a ring gear (23) that meshes with the driven gear (22).
8. A marine sediment detection and sampling device according to claim 7, characterized in that, The upper outer wall of the sampling tube (2) is fixedly connected to a device box (18) that communicates with the upper port of the inner hole (17). The air inlet end of the sampling tube (2) is connected to a hose (19). A short pipe (30) is connected to the device box (18). The end of the hose (19) is inserted into the short pipe (30). An inner rod (24) is provided in the inner hole (17). The upper end of the inner rod (24) is movably installed in the device box (18).
9. A marine sediment detection and sampling device according to claim 8, characterized in that, A vertical rod (26) is fixedly installed inside the device box (18). A counterweight (25) is slidably installed on the vertical rod (26). The upper end of the inner rod (24) is fixedly connected to the counterweight (25). A third spring (27) is installed between the counterweight (25) and the inner top of the device box (18).
10. A method of using a marine sediment detection and sampling device, characterized in that, The method of using a marine sediment detection and sampling device as described in any one of claims 1-9 includes the following steps: S1. Insert the sampling tube (2) vertically into the marine sediment; S2. Rotate the sampling tube (2) back and forth, with the rotation range between 15° and 45°; S3. During the reciprocating rotation of the sampling tube (2), shake the sampling tube (2) up and down; S4. Remove the sludge that is in contact with the lower port of the sampling tube (2); S5. When the sampling tube (2) reaches the preset depth, stop the operation of the sampling tube (2) and pull it out of the marine sediment; S6. Remove the sampling tube (2) and pour out the sediment in the sampling tube (2).