A portable sediment sampler with a multi-functional sampling structure for shallow sea use

Abstract

This invention discloses a portable sediment sampler with a multifunctional collection structure for shallow sea use. It includes a connecting cylinder with a T-shaped operating handle fixedly connected to its top. A connecting layer column is movably installed at the bottom of the connecting cylinder, and a sampling mechanism is fixedly installed at the bottom of the connecting layer column. The sampling mechanism comprises a vertical cylinder, a compression spring, a sediment sampling cylinder, a first slot, a second slot, and a folded cylindrical plate. The sampling mechanism also includes a sealing cylinder, a threaded ring, a filter cotton sheet, and a filter plate. This sampler can simultaneously sample seabed sediment and seabed water, and can separate the sediment from the seabed water. During use, the sampler can be fixed to the side plate of a small fishing boat using an N-type mounting bracket, an adjusting rod, and a pressure disc. Furthermore, during the deep-sea sampling process, the support mechanism effectively prevents the sampling mechanism from tilting. The sampler also has an anti-loss function.

Description

Technical Field

[0001] This invention relates to the field of sediment sampler technology, specifically a portable sediment sampler with a multifunctional collection structure for use in shallow seas. Background Technology

[0002] Shallow sea sediments are seabed materials formed by shallow sea sedimentation processes. They contain a wealth of geological and biological information. Conducting investigations and studies on the types and distribution of shallow sea sediments, their transport and dynamic processes, geotechnical properties, and microbial communities is of great significance for the environmental assessment of shallow sea mineral resources and subsequent resource exploitation.

[0003] In current shallow-sea sediment sampling methods, most involve an underwater robot propelling a sampler perpendicular to the surface sediment layer and then driving it deeper into the sediment layer. However, due to the gravity of the sediment, if the bottom of the sampler is not properly sealed, the sampled sediment is prone to falling out when the sampler is pulled out of the sediment layer.

[0004] On the other hand, in existing sediment samplers, when sampling sediments in shallow seas, the sediments and seawater enter the sampling tube together, mixing together, which makes the subsequent separation and detection process cumbersome and complicated. Summary of the Invention

[0005] The purpose of this invention is to provide a portable sediment sampler with a multifunctional collection structure for use in shallow seas, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a portable sediment sampler with a multifunctional collection structure for shallow sea use, comprising a connecting cylinder, a T-shaped operating handle fixedly connected to the top of the connecting cylinder, a connecting layer column movably installed at the bottom of the connecting cylinder, and a sampling mechanism fixedly installed at the bottom of the connecting layer column;

[0007] The sampling mechanism comprises an upright cylinder, a compression spring, a deposition sampling cylinder, a first slot, a second slot, and a folded cylindrical plate. The upright cylinder and the compression spring are both fixedly installed at the bottom of the connecting layer column, with the compression spring located inside the space of the upright cylinder. The deposition sampling cylinder is slidably installed inside the upright cylinder, with the top of the deposition sampling cylinder in contact with the bottom of the compression spring. There are two sets of the first slot and the second slot. The two sets of the first slot are respectively opened on the front and back of the upright cylinder, and the two sets of the second slot are respectively opened on the front and back of the deposition sampling cylinder. The first slot and the second slot are arranged vertically. The folded cylindrical plate is installed at the top of the deposition sampling cylinder and the bottom of the connecting layer column, with the outer surface of the folded cylindrical plate in contact with the inner wall of the upright cylinder.

[0008] The sampling mechanism also includes a sealing cylinder, a threaded ring, a filter cotton sheet, and a filter plate. The threaded ring is threadedly connected to the inner wall of the sedimentation sampling cylinder. The sealing cylinder is fixedly installed at the bottom of the threaded ring. The filter plate is fixedly installed on the inner wall of the threaded ring. The filter cotton sheet is placed on the top of the filter plate.

[0009] Preferably, an integral plate is fixedly installed on both outer walls of the connecting cylinder, and a tension spring and a telescopic sleeve are fixedly connected to the bottom of the two sets of integral plates. The tension spring is wrapped around the outer surface of the telescopic sleeve, and a support mechanism is movably sleeved on the outer surface of the vertical cylinder. The top of the support mechanism is fixedly connected to the bottom of the telescopic sleeve.

[0010] Preferably, the support mechanism comprises a connecting ring, a bending bracket, a base, a threaded column, and a chassis. The connecting ring is movably sleeved on the outer surface of the vertical cylinder. There are four sets of bending brackets, bases, threaded columns, and chassis. The four sets of bending brackets are evenly fixed on the outer surface of the connecting ring. The four sets of bases are respectively fixedly installed at the bottom of the four sets of bending brackets. The four sets of threaded columns are threadedly connected to the four sets of bases. The four sets of chassis are respectively fixedly installed at the bottom of the four sets of threaded columns.

[0011] Preferably, both outer walls of the connecting cylinder are fixedly equipped with through slot plates, and arc-shaped rods are inserted into the inner walls of the two sets of through slot plates. A winding mechanism is provided above the arc-shaped rods.

[0012] Preferably, the winding mechanism includes a U-shaped frame plate, a variable frequency motor, a rotating roller, and a winding rope. The variable frequency motor is installed on one side of the U-shaped frame plate, the rotating roller is installed at the output end of the variable frequency motor, the winding rope is fixedly connected to the outer surface of the rotating roller, and the tail end of the winding rope is fixedly connected to the top of the arc-shaped rod.

[0013] Preferably, a bending rod is fixedly installed on the back of the U-shaped frame plate, an N-type bracket is fixedly installed at the bottom of the bending rod, an adjusting rod is threadedly connected to the rear wall of the N-type bracket, an extrusion disc is fixedly installed on the front of the adjusting rod, and a turntable is fixedly connected to the back of the adjusting rod.

[0014] Preferably, a servo motor is installed on the bottom wall of the connecting cylinder, and a rotating rod is installed at the output end of the servo motor, with the bottom of the rotating rod extending into the interior of the connecting layer column.

[0015] Preferably, a plug is installed through the front of the connecting column, and the back of the plug penetrates the interior of the rotating rod, with a nut threaded onto the outer surface of the plug.

[0016] Preferably, a retaining ring is fixedly connected to the back of the bending rod, and a wire ring is movably sleeved on the inner wall of the retaining ring.

[0017] As a preferred embodiment, the working steps of this sediment sampler are as follows:

[0018] S1. By engaging the N-type card holder onto the edge plate of the small fishing boat, and then manually applying a rotational force in a set direction to the turntable, the adjusting rod drives the extrusion disc to rotate while moving towards the side plate of the small fishing boat until the outer surface of the extrusion disc and one side wall of the N-type card holder are tightly attached to the outer walls of both sides of the side plate of the small fishing boat.

[0019] S2. By running the variable frequency motor, the output shaft is driven to rotate the rotating roller in the set direction to wind and unwind the rope wound on the outer surface of the rotating roller.

[0020] S3. Using the robotic arm of the underwater robot, the sampler's T-shaped operating handle is grasped, moving the sampler to a position perpendicular to the surface of the sediment. At this time, the four chassis are also placed on the surface of the sediment. The underwater robot then continues to move the sampler downwards, while cooperating with the servo motor to make its output shaft drive the rotating rod to rotate in the set direction. This drives the sampling mechanism to penetrate deeper into the sediment through the connecting column. Because the tension spring has a certain elasticity and the connecting ring and the sampling mechanism are in a movable sleeve combination, the tension spring is subjected to the squeezing force generated by the sampling mechanism moving downwards relative to the support mechanism during the downward movement of the sampling mechanism. It contracts inwards, and the bottom of the support mechanism is always in contact with the surface of the sediment.

[0021] S4. As the sampling mechanism penetrates into the sediment layer, the force of the sediment feedback to the sediment sampling tube can be transmitted upward to the location of the compression spring, causing it to contract upward, so that the sediment sampling tube can move upward along the inner wall of the vertical tube, causing the second slot to overlap with the first slot. At this time, the sediment scattered around the sampling mechanism will enter the space of the sediment sampling tube along the two overlapping slots. At the same time, the water from the seabed layer can also enter the space of the sediment sampling tube, and then seep down into the space of the sealed tube along the filter cotton and filter plate.

[0022] S5. After sampling, the underwater robot moves upward at a certain speed, pulling the sampling mechanism out of the sediment. At this time, the downward squeezing force on the sampling mechanism is removed. Due to the restoring effect of the squeezing spring and the gravity of the sediment sampling tube itself, the sediment sampling tube slides down along the inner wall of the vertical tube, offsetting the two sets of slots.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. In this invention, after the sampling mechanism is perpendicular to the surface of the sediment, it continues to penetrate downwards into the interior of the sediment layer. The force of the sediment feedback to the sediment sampling tube can be transmitted upwards to the location of the compression spring, causing the compression spring to contract inwards. At the same time, the sediment sampling tube moves upwards along the inner wall of the vertical tube so that the second slot coincides with the first slot. At this time, the sediment scattered around the sampling mechanism will enter the space inside the sediment sampling tube along the two overlapping slots, thereby achieving the purpose of collecting seabed sediment samples. At the same time, the water in the seabed layer can also enter the space inside the sediment sampling tube, and then seep downwards into the space inside the sealed tube along the filter cotton and filter plate, thereby achieving the purpose of collecting seabed water samples. The filter cotton and filter plate separate the sediment and bottom water, so as to promote the stratification of bottom water and sediment on site. Through the above operations, the multi-functionality of this sampler is achieved.

[0025] 2. In this invention, when the sampler moves to a position perpendicular to the surface of the sediment, the four sets of chassis are also placed on the surface of the sediment. Since the tension spring has a certain elasticity, the connecting ring and the sampling mechanism are in a movable sleeve combination, and the contact area between the bottom surface of the four sets of chassis and the sediment surface is relatively large, the bottom surface of the four sets of chassis always stays in contact with the surface of the sediment as the underwater robot continues to move the sampler downward. This effectively reduces the probability of the sampling mechanism tilting when it penetrates deeper into the sediment layer, thereby ensuring that the sampling is not affected.

[0026] 3. In this invention, by operating a variable frequency motor, the output shaft is driven to rotate the roller in a set direction to wind up or unwind the rope wound on the outer surface of the roller. At the same time, the speed of winding up and unwinding is consistent with the speed at which the underwater robot moves towards the seabed. Thus, even if the underwater robot's manipulator suddenly loses contact with the T-shaped operating handle, the sampler can be retrieved, thereby achieving the purpose of preventing loss.

[0027] 4. In this invention, by engaging the N-type card holder onto the side plate of a small fishing boat, and then driving the adjusting rod and the extrusion disc to rotate, the outer surface of the extrusion disc and one side wall of the N-type card holder are tightly attached to the outer walls of both sides of the side plate of the small fishing boat, thereby achieving the purpose of firmly engaging the N-type card holder onto the side plate of the small fishing boat. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the installation structure of the connecting cylinder and the connecting layer column of the present invention;

[0030] Figure 3This is a schematic diagram of the installation structure of the sampling mechanism of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the sealing cylinder and the threaded ring of the present invention;

[0032] Figure 5 This is a schematic diagram of the installation structure of the connecting column and the vertical tube of the present invention;

[0033] Figure 6 This is a schematic diagram of the installation structure of the support mechanism of the present invention;

[0034] Figure 7 This is a schematic diagram of the N-type card holder and adjusting rod of the present invention;

[0035] Figure 8 This is a schematic diagram of the winding mechanism and bending rod of the present invention.

[0036] In the diagram: 1. Connecting cylinder; 2. T-shaped operating handle; 3. Connecting layer column; 4. Sampling mechanism; 5. Vertical cylinder; 6. Compression spring; 7. Sedimentation sampling cylinder; 8. First slot; 9. Second slot; 10. Folded cylindrical plate; 11. Sealing cylinder; 12. Threaded ring; 13. Filter cotton sheet; 14. Filter plate; 15. Integrated plate; 16. Tension spring; 17. Telescopic sleeve; 18. Support mechanism; 19. Connecting 20. Ring; 21. Bending bracket; 22. Base; 23. Threaded column; 24. Chassis; 25. Through slot plate; 26. Arc rod; 27. Winding mechanism; 28. U-shaped frame plate; 29. ​​Variable frequency motor; 30. Rotary roller; 31. Rope winding; 32. Bending rod; 33. N-type card holder; 34. Adjusting rod; 35. Extrusion disc; 36. Turntable; 37. Servo motor; 38. Rotating rod; 39. Insert pin; 30. Wire ring. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," 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 this 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 this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "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.

[0040] Please see Figures 1-8 One embodiment provided by the present invention:

[0041] A portable sediment sampler with a multifunctional collection structure for shallow sea use includes a connecting cylinder 1. A T-shaped operating handle 2 is fixedly connected to the top of the connecting cylinder 1. A connecting layer column 3 is movably installed at the bottom of the connecting cylinder 1. A sampling mechanism 4 is fixedly installed at the bottom of the connecting layer column 3. The sampling mechanism 4 includes a vertical cylinder 5, a compression spring 6, a sediment sampling cylinder 7, a first slot 8, a second slot 9, and a folded cylindrical plate 10. The vertical cylinder 5 and the compression spring 6 are both fixedly installed at the bottom of the connecting layer column 3, and the compression spring 6 is located within the space of the vertical cylinder 5. Inside, the deposition sampling tube 7 is slidably installed inside the vertical tube 5, and the top of the deposition sampling tube 7 is in contact with the bottom of the compression spring 6. There are two sets of first slots 8 and two sets of second slots 9. The two sets of first slots 8 are respectively opened on the front and back of the vertical tube 5, and the two sets of second slots 9 are respectively opened on the front and back of the deposition sampling tube 7. The first slots 8 and the second slots 9 are arranged vertically. The folded cylindrical plate 10 is installed on the top of the deposition sampling tube 7 and the bottom of the connecting layer column 3, and the outer surface of the folded cylindrical plate 10 is in contact with the inner wall of the vertical tube 5.

[0042] The sampling mechanism 4 also includes a sealing cylinder 11, a threaded ring 12, a filter cotton sheet 13, and a filter plate 14. The threaded ring 12 is threadedly connected to the inner wall of the sedimentation sampling cylinder 7. The sealing cylinder 11 is fixedly installed at the bottom of the threaded ring 12. The filter plate 14 is fixedly installed on the inner wall of the threaded ring 12. The filter cotton sheet 13 is placed on the top of the filter plate 14.

[0043] During sampling, the underwater robot's robotic arm grasps the T-shaped operating handle 2 of the sampler, moving it to a position perpendicular to the surface sediment. The underwater robot then continues to move the sampler downwards. Because the bottom of the sealed cylinder 11 is pointed, it improves the efficiency of the sampling mechanism 4 in penetrating the sediment layer. As the sampling mechanism 4 penetrates deeper into the sediment layer, the force exerted by the sediment on the sampling cylinder 7 is transmitted upwards to the compression spring 6, causing it to contract upwards and change its overall length. Simultaneously, the sampling cylinder 7 moves upwards along the inner wall of the vertical cylinder 5. When the compression spring 6 contracts to its maximum... When the second slot 9 overlaps with the first slot 8, the sediment scattered around the sampling mechanism 4 will enter the space of the sediment sampling tube 7 through the two overlapping slots, thereby achieving the purpose of collecting seabed sediment samples. At the same time, the seabed water can also enter the space of the sediment sampling tube 7 and then seep down into the space of the sealed tube 11 through the filter cotton sheet 13 and the filter plate 14, thereby achieving the purpose of collecting seabed water samples. The sediment and bottom water are separated by the filter cotton sheet 13 and the filter plate 14, so that the collected sediment samples and bottom water samples can be directly taken off and used after the sampling is completed without further separation.

[0044] When the second slot 9 is below the first slot 8, the folded cylindrical plate 10 is spread out as a whole, which can block the first slot 8, thereby effectively preventing sediment from entering the space inside the vertical cylinder 5 in advance through the first slot 8.

[0045] After sampling, by applying a rotational force in a set direction to the sealing cylinder 11, the threaded ring 12 is caused to rotate downward along the inner wall of the sedimentation sampling cylinder 7, thereby causing the sealing cylinder 11 to gradually disengage from the sedimentation sampling cylinder 7. At this time, the sample inside the space of the sedimentation sampling cylinder 7 can be discharged downward, thereby transferring the sediment sample. Then, the structure composed of the sealing cylinder 11, the threaded ring 12 and the filter plate 14 is placed upside down in the bottom water storage tank, thereby completing the transfer of the bottom water sample.

[0046] Both sides of the outer wall of the connecting cylinder 1 are fixedly installed with an integral plate 15. The bottom of the two sets of integral plates 15 are fixedly connected with a tension spring 16 and a telescopic sleeve 17. The tension spring 16 is wrapped around the outer surface of the telescopic sleeve 17. The outer surface of the vertical cylinder 5 is movably sleeved with a support mechanism 18. The top of the support mechanism 18 is fixedly connected to the bottom of the telescopic sleeve 17. The support mechanism 18 includes a connecting ring 19, a bending bracket 20, a base 21, a threaded column 22, and a chassis 23. The connecting ring 19 is movably sleeved on the outer surface of the vertical cylinder 5. There are four sets of bending brackets 20, bases 21, threaded columns 22, and chassis 23. The four sets of bending brackets 20 are evenly fixed on the outer surface of the connecting ring 19. The four sets of bases 21 are fixedly installed at the bottom of the four sets of bending brackets 20. The four sets of threaded columns 22 are threadedly connected to the four sets of bases 21. The four sets of chassis 23 are fixedly installed at the bottom of the four sets of threaded columns 22.

[0047] When the sampler moves to a position perpendicular to the surface of the sediment, the four sets of base plates 23 are also placed on the surface of the sediment. Since the tension spring 16 has a certain elasticity, the connecting ring 19 and the sampling mechanism 4 are in a movable sleeve combination, and the contact area between the bottom surface of the four sets of base plates 23 and the surface of the sediment is relatively large, as the underwater robot continues to move the sampler downward, the four sets of base plates 23 adhere to the surface of the sediment and feed upward the squeezing force generated by the downward movement of the sampling mechanism 4 relative to the support mechanism 18. Then, this squeezing force is transmitted upward through the base 21, the bending bracket 20 and the connecting ring 19 to the location of the tension spring 16, causing it to contract inward. This makes it easier for the bottom surface of the four sets of base plates 23 to always adhere to the surface of the sediment, thereby effectively reducing the probability of the sampling mechanism 4 tilting when it penetrates into the sediment layer, and thus ensuring that the sampling is not affected.

[0048] Since the chassis 23 is connected to the base 21 by threaded engagement through the threaded post 22, the two are detachable, and the dimensions of the four chassis 23 can be replaced according to the actual application.

[0049] Both sides of the outer wall of the connecting cylinder 1 are fixedly installed with through slot plates 24. The inner walls of the two sets of through slot plates 24 are inserted with arc rods 25. A winding mechanism 26 is set above the arc rods 25. The winding mechanism 26 includes a U-shaped frame plate 27, a variable frequency motor 28, a rotating roller 29 and a winding rope 30. The variable frequency motor 28 is installed on one side of the U-shaped frame plate 27. The rotating roller 29 is installed at the output end of the variable frequency motor 28. The winding rope 30 is fixedly connected to the outer surface of the rotating roller 29, and the tail end of the winding rope 30 is fixedly connected to the top of the arc rod 25.

[0050] By operating the variable frequency motor 28, its output shaft drives the rotating roller 29 to rotate in a set direction, which is used to wind up or unwind the rope 30 wound on the outer surface of the rotating roller 29. During the process of the sampler going deep into the sea layer, the winding and unwinding operation of the rope 30 is coordinated with the underwater robot's movement speed towards the seabed, which adds an extra layer of protection to the sampler, so as to prevent the underwater robot's manipulator from suddenly losing contact with the T-shaped operating handle 2, which would result in the sampler being unable to be retrieved.

[0051] A bending rod 31 is fixedly installed on the back of the U-shaped frame plate 27. An N-type bracket 32 ​​is fixedly installed at the bottom of the bending rod 31. An adjusting rod 33 is threadedly connected to the rear wall of the N-type bracket 32. An extrusion disc 34 is fixedly installed on the front of the adjusting rod 33. A turntable 35 is fixedly connected to the back of the adjusting rod 33.

[0052] By engaging the N-type mounting bracket 32 ​​onto the side plate of the small fishing boat, and then manually applying a rotational force in a set direction to the turntable 35, the adjusting rod 33 causes the extrusion disc 34 to rotate while moving towards the side plate of the small fishing boat, until the outer surface of the extrusion disc 34 and one side wall of the N-type mounting bracket 32 ​​are tightly fitted against the outer walls of the two sides of the side plate of the small fishing boat, thereby achieving the purpose of firmly engaging the N-type mounting bracket 32 ​​onto the side plate of the small fishing boat.

[0053] A servo motor 36 is installed on the bottom wall of the connecting cylinder 1. A rotating rod 37 is installed at the output end of the servo motor 36. The bottom of the rotating rod 37 extends into the interior of the connecting layer column 3. A plug pin 38 is installed through the front of the connecting layer column 3. The back of the plug pin 38 extends through the interior of the rotating rod 37. A nut is threaded onto the outer surface of the plug pin 38.

[0054] By moving the sampler toward the interior of the sediment layer with the help of the underwater robot, the servo motor 36 is operated to drive the rotating rod 37 to rotate in the set direction. This improves the efficiency of the sampling mechanism 4 to penetrate deeper into the sediment layer through the connecting column 3. The insertion pin 38 is set to increase the firmness of the combination between the rotating rod 37 and the connecting column 3.

[0055] A retaining ring is fixedly connected to the back of the bending rod 31, and a wire ring 39 is movably sleeved on the inner wall of the retaining ring.

[0056] The design of the retaining ring and wire ring 39 makes this sampler easy to carry.

[0057] The working steps of this sediment sampler are as follows:

[0058] S1. By engaging the N-type card holder 32 onto the edge plate of the small fishing boat, and then manually applying a rotational force in a set direction to the turntable 35, the adjusting rod 33 causes the extrusion disc 34 to rotate while moving towards the side plate of the small fishing boat, until the outer surface of the extrusion disc 34 and one side wall of the N-type card holder 32 are tightly attached to the outer walls of both sides of the side plate of the small fishing boat.

[0059] S2. By running the variable frequency motor 28, its output shaft drives the rotating roller 29 to rotate in a set direction, so as to wind and unwind the rope 30 wound on the outer surface of the rotating roller 29.

[0060] S3. The underwater robot's robotic arm grabs the T-shaped operating handle 2 of the sampler, moving the sampler to a position perpendicular to the surface of the sediment. At this time, the four sets of chassis 23 are also placed on the surface of the sediment. Then the underwater robot continues to move the sampler downwards, while cooperating with the servo motor 36 to make its output shaft drive the rotating rod 37 to rotate in the set direction. In this way, the sampling mechanism 4 is driven to penetrate into the inner layer of the sediment through the connecting column 3. Since the tension spring 16 has a certain elasticity and the connecting ring 19 and the sampling mechanism 4 are in a movable sleeve combination, the tension spring 16 is subjected to the squeezing force generated by the sampling mechanism 4 moving downwards relative to the support mechanism 18 during the downward movement of the sampling mechanism 4. It contracts inwards, and the bottom of the support mechanism 18 is always in contact with the surface of the sediment.

[0061] S4. As the sampling mechanism 4 penetrates into the sediment layer, the force of the sediment feedback to the sediment sampling cylinder 7 can be transmitted upward to the location of the compression spring 6, causing it to contract upward so that the sediment sampling cylinder 7 can move upward along the inner wall of the vertical cylinder 5, causing the second slot 9 to overlap with the first slot 8. At this time, the sediment scattered around the sampling mechanism 4 will enter the space of the sediment sampling cylinder 7 along the two overlapping slots. At the same time, the water from the seabed layer can also enter the space of the sediment sampling cylinder 7, and then seep down into the space of the sealed cylinder 11 along the filter cotton sheet 13 and the filter plate 14.

[0062] S5. After sampling, the underwater robot moves upward at a certain speed, pulling the sampling mechanism 4 out of the sediment. At this time, the downward squeezing force on the sampling mechanism 4 is removed. Due to the restoring effect of the squeezing spring 6 and the gravity of the sediment sampling cylinder 7, the sediment sampling cylinder 7 slides downward along the inner wall of the vertical cylinder 5, offsetting the two sets of slots.

[0063] Working Principle: The underwater robot's robotic arm grasps the T-shaped operating handle 2, moving the sampler to a position perpendicular to the surface sediment. The underwater robot then continues to move the sampler downwards, simultaneously coordinating with the servo motor 36 to propel the sampling mechanism 4 deeper into the sediment layer. During this downward movement, the tension spring 16 experiences a compressive force from the sampling mechanism 4 relative to the support mechanism 18, causing it to contract inwards. The bottom of the support mechanism 18 remains in contact with the sediment surface, effectively preventing the sampling mechanism 4 from tilting. Simultaneously, as the sampling mechanism 4 penetrates deeper into the sediment layer, the force from the sediment on the sediment sampling cylinder 7 is transmitted upwards to the compression spring 6, causing it to contract upwards to change its position. The overall length of the sample collection tube 7 is adjusted so that the second slot 9 and the first slot 8 overlap, allowing the sediment scattered around the sampling mechanism 4 to enter the space of the sample collection tube 7 through the two overlapping slots, thus achieving the purpose of collecting seabed sediment samples. At the same time, the seabed water can also enter the space of the sample collection tube 7 and then seep down into the space of the sealed tube 11 through the filter cotton sheet 13 and the filter plate 14, thus achieving the purpose of collecting seabed water samples. Then, the underwater robot moves upward at a certain speed, driving the sampling mechanism 4 to be pulled out of the sediment. When the variable frequency motor 28 runs, it drives the winding rope 30 to be wound or unwound, maintaining the same speed as the underwater robot moving towards the seabed, adding an extra layer of protection to this sampler.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A portable sediment sampler with a multifunctional sampling structure for shallow sea use, comprising a connecting cylinder (1), characterized in that: The top of the connecting cylinder (1) is fixedly connected to a T-shaped operating handle (2), the bottom of the connecting cylinder (1) is movably installed with a connecting layer column (3), and the bottom of the connecting layer column (3) is fixedly installed with a sampling mechanism (4). The sampling mechanism (4) comprises a vertical cylinder (5), a compression spring (6), a sedimentation sampling cylinder (7), a first slot (8), a second slot (9), and a folded cylindrical plate (10). The vertical cylinder (5) and the compression spring (6) are both fixedly installed at the bottom of the connecting layer column (3), and the compression spring (6) is located inside the space of the vertical cylinder (5). The sedimentation sampling cylinder (7) is slidably installed inside the vertical cylinder (5), and the top of the sedimentation sampling cylinder (7) is in contact with the bottom of the compression spring (6). The number of the first slot (8) and the second slot (8) are both two sets. The two sets of the first slot (8) are respectively opened on the front and back of the vertical cylinder (5), and the two sets of the second slot (9) are respectively opened on the front and back of the sedimentation sampling cylinder (7). The first slot (8) and the second slot (9) are arranged vertically. The folded cylindrical plate (10) is installed on the top of the sedimentation sampling cylinder (7) and the bottom of the connecting layer column (3). The outer surface of the folded cylindrical plate (10) is in contact with the inner wall of the vertical cylinder (5). The sampling mechanism (4) also includes a sealing cylinder (11), a threaded ring (12), a filter cotton sheet (13), and a filter plate (14). The threaded ring (12) is threadedly connected to the inner wall of the sedimentation sampling cylinder (7). The sealing cylinder (11) is fixedly installed at the bottom of the threaded ring (12). The filter plate (14) is fixedly installed on the inner wall of the threaded ring (12). The filter cotton sheet (13) is placed on the top of the filter plate (14).

2. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 1, characterized in that: Both sides of the connecting cylinder (1) are fixedly installed with an integral plate (15). The bottom of the two sets of integral plates (15) are fixedly connected with a tension spring (16) and a telescopic sleeve (17). The tension spring (16) surrounds the outer surface of the telescopic sleeve (17). The outer surface of the upright cylinder (5) is movably sleeved with a support mechanism (18). The top of the support mechanism (18) is fixedly connected to the bottom of the telescopic sleeve (17).

3. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 2, characterized in that: The structure of the support mechanism (18) includes a connecting ring (19), a bending bracket (20), a base (21), a threaded column (22), and a chassis (23). The connecting ring (19) is movably sleeved on the outer surface of the vertical cylinder (5). There are four sets of bending brackets (20), bases (21), threaded columns (22), and chassis (23). The four sets of bending brackets (20) are evenly fixed on the outer surface of the connecting ring (19). The four sets of bases (21) are respectively fixedly installed at the bottom of the four sets of bending brackets (20). The four sets of threaded columns (22) are respectively threadedly connected to the four sets of bases (21). The four sets of chassis (23) are respectively fixedly installed at the bottom of the four sets of threaded columns (22).

4. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 3, characterized in that: Both sides of the connecting cylinder (1) are fixedly installed with through slot plates (24), and the inner walls of the two sets of through slot plates (24) are connected with arc rods (25), and a winding mechanism (26) is provided above the arc rods (25).

5. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 4, characterized in that: The winding mechanism (26) comprises a U-shaped frame plate (27), a variable frequency motor (28), a rotating roller (29), and a winding rope (30). The variable frequency motor (28) is installed on one side of the U-shaped frame plate (27), the rotating roller (29) is installed at the output end of the variable frequency motor (28), and the winding rope (30) is fixedly connected to the outer surface of the rotating roller (29), and the tail end of the winding rope (30) is fixedly connected to the top of the arc-shaped rod (25).

6. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 5, characterized in that: A bending rod (31) is fixedly installed on the back of the U-shaped frame plate (27). An N-type card seat (32) is fixedly installed at the bottom of the bending rod (31). An adjusting rod (33) is threadedly connected to the rear wall of the N-type card seat (32). An extrusion disc (34) is fixedly installed on the front of the adjusting rod (33). A turntable (35) is fixedly connected to the back of the adjusting rod (33).

7. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 6, characterized in that: A servo motor (36) is installed on the bottom wall of the connecting cylinder (1), and a rotating rod (37) is installed at the output end of the servo motor (36), with the bottom of the rotating rod (37) extending into the interior of the connecting layer column (3).

8. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 7, characterized in that: The front of the connecting column (3) is fitted with a plug pin (38), and the back of the plug pin (38) penetrates the interior of the rotating rod (37). The outer surface of the plug pin (38) is threaded with a nut.

9. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 8, characterized in that: A retaining ring is fixedly connected to the back of the bending rod (31), and a wire ring (39) is movably sleeved on the inner wall of the retaining ring.

10. A portable sediment sampler with a multifunctional sampling structure for shallow sea use according to claim 9, characterized in that, The working steps of this sediment sampler are as follows: S1. By engaging the N-type card holder (32) onto the edge plate of the small fishing boat, and then by manually applying a rotational force in a set direction to the turntable (35), the adjusting rod (33) causes the extrusion disc (34) to rotate while moving towards the side plate of the small fishing boat, until the outer surface of the extrusion disc (34) and one side wall of the N-type card holder (32) are tightly fitted to the outer walls of both sides of the side plate of the small fishing boat. S2. By running the variable frequency motor (28), the output shaft drives the rotating roller (29) to rotate in the set direction, so as to wind and unwind the rope (30) wound on the outer surface of the rotating roller (29); S3. Using the robotic arm of the underwater robot to grab the T-shaped operating handle (2) of this sampler, the sampler is moved to a position perpendicular to the surface of the sediment. At this time, the four chassis (23) are also placed on the surface of the sediment. Then the underwater robot continues to move the sampler downwards, and at the same time, it cooperates with the running servo motor (36) to make its output shaft drive the rotating rod (37) to rotate in the set direction. In this way, the sampling mechanism (4) is driven to penetrate into the inner layer of the sediment through the connecting column (3). Since the tension spring (16) has a certain elasticity and the connecting ring (19) and the sampling mechanism (4) are in a movable sleeve combination, the tension spring (16) is subjected to the squeezing force generated by the sampling mechanism (4) moving downwards relative to the support mechanism (18) during the downward movement of the sampling mechanism (4). It contracts inwards, and the bottom of the support mechanism (18) is always in contact with the surface of the sediment. S4. During the process of the sampling mechanism (4) penetrating into the sediment layer, the force of the sediment feedback to the sediment sampling tube (7) can be transmitted upward to the location of the compression spring (6), causing it to contract upward so that the sediment sampling tube (7) can move upward along the inner wall of the vertical tube (5), causing the second slot (9) to overlap with the first slot (8). At this time, the sediment scattered around the sampling mechanism (4) will enter the space of the sediment sampling tube (7) along the two overlapping slots. At the same time, the water of the seabed layer can enter the space of the sediment sampling tube (7) and then seep down into the space of the sealed tube (11) along the filter cotton sheet (13) and filter plate (14). S5. After sampling, the underwater robot moves upward at a certain speed, driving the sampling mechanism (4) to be pulled out of the sediment. At this time, the downward squeezing force on the sampling mechanism (4) is removed. Due to the restoring effect of the squeezing spring (6) and the gravity of the sediment sampling tube (7), the sediment sampling tube (7) slides down along the inner wall of the vertical tube (5) and the two sets of slots are offset.

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