A multi-tube sampler for sandy substrate sediments with anti-buoyancy function

Abstract

This invention discloses a multi-tube sampler for sandy substrate sediments with anti-buoyancy function, comprising a composite support column, a combined cylinder fixedly connected to the bottom of the composite support column, a composite disk fixedly installed at the bottom of the combined cylinder, a main sampler fixedly installed at the bottom of the composite disk, four evenly arranged adjustment mechanisms fixedly installed at the bottom of the composite disk, auxiliary samplers fixedly connected to the outer surfaces of the four adjustment mechanisms, a sealing disk threadedly connected to the middle of the inner wall of both the main sampler and the auxiliary samplers, a combined ring threadedly connected to the inner wall of the bottom opening of both the main sampler and the auxiliary samplers, and multiple sets of triangular springs arranged in a ring fixedly connected to the top of the combined rings. In this invention, the opening and closing of the sealing structure formed by the multiple sets of triangular springs can be controlled by the extension and retraction of a waterproof electric actuator, depending on whether sampling is required, thereby facilitating sampling and sealing the sampler tube after sampling.

Description

Technical Field

[0001] This invention relates to the field of sampler technology, specifically to a multi-tube sampler for sandy substrate sediments with anti-buoyancy function. Background Technology

[0002] Particulate matter in water settles to the bottom of oceans, lakes, and rivers through sedimentation, forming sediments. Because they record environmental and climatic information, and possess their own physicochemical properties and host organisms, sediments are important research carriers in fields such as geology, environment, biology, chemistry, and engineering. Therefore, sediment samplers are needed to collect the required samples. The most common type of sampler is the gravity column sampler. The quality of the sample obtained is closely related to the weight of the sampler. Generally, the greater the weight, the longer and better the quality of the sample obtained. It can also ensure that the natural layers of the sediment sample are not disturbed, and continuously obtain sedimentary information and the vertical distribution of biological records at each layer. It is an indispensable survey and sampling method for studying long-term climate and environmental evolution, biological distribution characteristics, and vertical differences in the physical and mechanical properties of sediments.

[0003] In existing technologies, when a sampler is used to collect samples from the bottom of the water, two sets of openable semicircular plates are usually installed at the bottom of the sampler cylinder. As the sampler cylinder goes deeper into the sediment layer, the two sets of semicircular plates are squeezed by the sediment below, causing the two sets of semicircular plates, which were originally in a circular state, to gradually open. Then the sediment enters the space inside the sampler cylinder. After the sampling is completed, as the sampler cylinder rises, the two sets of semicircular plates automatically return to their original shape. However, if the upward squeezing force of some sediment on the two sets of semicircular plates is insufficient to support the gradual opening of the two sets of semicircular plates, the sampler will fail to collect samples during the current descent.

[0004] In related technologies, negative pressure is used to control the sample to remain inside the sampler cylinder. However, if an unexpected situation occurs in the negative pressure state, the sample inside the sampler cylinder will naturally fall down, resulting in invalid sampling.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the present invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-tube sampler for sandy substrate sediments with anti-buoyancy function, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-tube sampler for sandy substrate sediments with anti-buoyancy function, comprising a composite support column, a combined cylinder fixedly connected to the bottom of the composite support column, a composite disk fixedly installed at the bottom of the combined cylinder, a main sampler fixedly installed at the bottom of the composite disk, four sets of evenly arranged adjustment mechanisms fixedly installed at the bottom of the composite disk, the four sets of adjustment mechanisms being equidistantly surrounding the main sampler, auxiliary samplers fixedly connected to the outer surfaces of the four sets of adjustment mechanisms, and threaded connections between the inner walls of the main sampler and the auxiliary samplers. The sealing disc has a combined ring threadedly connected to the inner wall of the bottom opening of both the main sampler and the auxiliary sampler. Multiple sets of triangular springs arranged in a ring are fixedly connected to the top of the combined ring. A waterproof electric actuator is fixedly connected to the top of the sealing disc, and the telescopic end of the waterproof electric actuator movably passes through the ring formed by the multiple sets of triangular springs. A steel support rod is fixedly connected to the telescopic end of the waterproof electric actuator, and compression rings are fixedly connected to both ends of the steel support rod. Multiple sets of pull ropes arranged in a ring are fixedly connected to the top of the compression ring, and the tops of the pull ropes are respectively fixedly connected to the bottoms of the multiple sets of triangular springs.

[0008] Preferably, the adjustment mechanism includes a locking groove post, a fitting post, a threaded rod, and a slider. The locking groove post is fixedly connected to the bottom of the integrated disk, the fitting post is rotatably connected to the inside of the locking groove post, the threaded rod is fixedly connected to the bottom of the fitting post, the slider is threadedly sleeved on the outer surface of the threaded rod, and one side of the slider is fixedly connected to the outer surface of the auxiliary sampler.

[0009] Preferably, four sets of T-shaped columns arranged in a square and equidistant manner are fixedly installed on the top of the integrated disk. The outer surfaces of the four sets of T-shaped columns are rotatably connected to support circular plates. Threaded sleeves are fixedly installed on one side of the top of the four sets of support circular plates. Fastening columns are threadedly connected to the inner walls of the four sets of threaded sleeves. Supplementary counterweight plates are movably sleeved on the outer surfaces of the threaded sleeves, and the top of the supplementary counterweight plates is in contact with the bottom of the top panel of the fastening column.

[0010] Preferably, the structure of the integrated support includes a limiting base plate, an upright column, threaded grooves, and limiting long nails. The bottom of the limiting base plate is fixedly connected to the top of the combined column, and the bottom of the upright column is fixedly connected to the top of the limiting base plate. There are multiple sets of threaded grooves, which are evenly arranged vertically on the outer surface of the upright column. The inner wall of one set of threaded grooves is threaded with limiting long nails.

[0011] Preferably, the outer surface of the upright column is movably fitted with multiple sets of vertically arranged counterweight lead rings, with the bottom of the lowest set of counterweight lead rings fitting against the top of the limiting base plate, and the top of the highest set of counterweight lead rings fitting against the bottom of the limiting long nail.

[0012] Preferably, the adjustment mechanism further includes a turntable and a lever cylinder, with the turntable fixedly installed at the bottom of the threaded rod and the lever cylinder fixedly connected to the outer surface of the turntable.

[0013] Preferably, the outer surface of the integrated disc is provided with a threaded ring, and the outer surface of the integrated disc is threadedly connected to a limiting cover ring through the threaded ring, and the inner wall of the limiting cover ring is respectively attached to the outer surface of the four sets of supporting discs.

[0014] Preferably, the structure of the integrated support column also includes a lifting ring, which is fixedly installed on the top of the upright column.

[0015] As a preferred embodiment, the operating steps of this multi-tube sampler are as follows:

[0016] S1. Use depth detection equipment to measure the distance between the sea surface and the underwater sampling location, then calculate the maximum buoyancy force on the sampler after it is launched into the water, and then equip the sampler with the corresponding number of counterweight lead rings and supplementary counterweight plates according to the calculated buoyancy force value.

[0017] S2. When the sampler still does not reach the weight that matches the buoyancy of the current descent after the maximum number of counterweight lead rings are fitted onto the outer surface of the upright column, a downward rotational force is applied to the limiting cover ring to make its top level with the top of the integrated disc. Then, a rotational force is applied to the four sets of support discs in sequence to make them rotate 180° along the outer surface of the T-shaped column. After that, a supplementary counterweight plate with a set weight value is fitted onto the outer surface of the threaded sleeve to supplement the overall weight of the sampler. Then, a fastening column that matches the overall height of the set number of supplementary counterweight plates is inserted into the inside of the threaded sleeve.

[0018] S3. The staff uses a geological steel cable to pull the sampler down through a hoisting ring. Relying on the weight of the counterweight ring, supplementary counterweight plate, and other components in the sampler, the sampler is driven into the sediment at the bottom of the water. At the same time, the waterproof electric actuator is operated to make it retract inward. Then, the steel support rod drives the extrusion ring to move upward a set distance. During the upward movement of the extrusion ring, it gradually exerts an upward extrusion force on the bottom formed by multiple sets of triangular springs, causing the multiple sets of triangular springs to gradually open. Afterward, as the underwater robot drives the sampler to gradually penetrate into the inner layer of the sandy base, the sediment in the inner layer of the sandy base will gradually enter the space of the main sampler or auxiliary sampler.

[0019] S4. After sampling is completed, run the waterproof electric actuator again to extend it downwards. Then, as the compression ring moves downwards through the steel support rod, multiple sets of pull ropes can exert downward pulling force on the upper part of multiple sets of triangular springs, causing the open sets of triangular springs to gradually merge, so as to seal the bottom of the main sampler or auxiliary sampler.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, the waterproof electric actuator retracts upward, causing the steel support rod and the extrusion ring to move upward a set distance. The extrusion ring then gradually exerts upward pressure on the sealing structure formed by multiple sets of triangular spring pieces, causing the spring pieces to gradually open. This facilitates sampling. After sampling, the waterproof electric actuator extends downward, causing the steel support rod and the extrusion ring to exert downward tension on multiple sets of ropes, causing the opened triangular spring pieces to gradually merge. When the outer surfaces of adjacent sets of triangular spring pieces are in contact, it indicates that the structure formed by the multiple sets of triangular spring pieces is in a closed state, thus sealing the bottom of the main or auxiliary sampler. This effectively prevents the sample from falling when the underwater robot raises the sampler. The opening and closing of the sealing structure formed by the multiple sets of triangular spring pieces is controlled by the extension and retraction of the waterproof electric actuator, depending on whether sampling is required.

[0022] 2. In this invention, the application of four sets of auxiliary samplers and the main sampler allows for the acquisition of multiple sediment samples in a single sampling action, which can effectively increase the sampling volume. Furthermore, by adjusting the four sets of auxiliary samplers to different height positions before sampling, it is possible to facilitate the collection of samples from different depths by the five sampler tubes, providing a basis for comparison of subsequent experimental and detection data.

[0023] 3. In this invention, by fitting a set number of counterweight lead rings onto the outer surface of the upright column, and then by inserting a limiting long nail into the interior of a set of threaded grooves above the upper set of counterweight lead rings, the upper part of the counterweight lead rings is limited by the limiting long nail. Therefore, after the sampler is submerged, the counterweight lead rings are not likely to detach from the upright column without cause.

[0024] 4. In this invention, a two-set counterweight growth mode is adopted. When the sampling water is shallow, a set number of counterweight lead rings are fitted onto the outer surface of the upright column according to the maximum buoyancy of the water. This is to make the overall weight of the sampler match the buoyancy of the current sampling. When the sampler still does not reach the weight that matches the buoyancy of the current sampling after fitting the set maximum number of counterweight lead rings onto the outer surface of the upright column, the four sets of support circular plates can be rotated outwards, and then a supplementary counterweight plate of a set weight value can be fitted onto the outer surface of the threaded sleeve to supplement the overall weight of the sampler. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic cross-sectional view of the main sampler of the present invention;

[0027] Figure 3 This is a schematic diagram of the disassembled structure of the combined ring and triangular spring piece of the present invention;

[0028] Figure 4 This is a schematic diagram of the waterproof electric actuator and steel support rod of the present invention;

[0029] Figure 5 This is a schematic diagram showing the disassembled structure of the adjustment mechanism and the auxiliary sampler of the present invention;

[0030] Figure 6 This is a schematic diagram of the installation structure of the integrated disc and the supporting disc of the present invention;

[0031] Figure 7 This is a schematic diagram of the disassembled structure of the integrated disc and the limiting cover ring of the present invention;

[0032] Figure 8 This is a schematic diagram of the integrated support structure of the present invention.

[0033] In the diagram: 1. Integrated support column; 2. Combined cylinder; 3. Integrated disc; 4. Main sampler; 5. Adjustment mechanism; 6. Auxiliary sampler; 7. Sealing disc; 8. Combined ring; 9. Triangular spring; 10. Waterproof electric actuator; 11. Steel support rod; 12. Extrusion ring; 13. Pull rope; 14. Engaging groove column; 15. Fitting column; 16. Threaded rod; 17. Sliding block; 18. T-shaped column; 19. Supporting disc; 20. Threaded sleeve; 21. Fastening column; 22. Supplementary counterweight plate; 23. Limiting base plate; 24. Upright column; 25. Threaded groove; 26. Limiting spike; 27. Counterweight lead ring; 28. Turntable; 29. ​​Assisted cylinder; 30. Limiting cover ring; 31. Lifting ring. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Please see Figures 1-8 One embodiment provided by the present invention:

[0038] A multi-tube sampler for sandy substrate sediments with anti-buoyancy function includes a composite support 1, a combined cylinder 2 fixedly connected to the bottom of the composite support 1, a composite disk 3 fixedly mounted at the bottom of the combined cylinder 2, a main sampler 4 fixedly mounted at the bottom of the composite disk 3, and four sets of evenly arranged adjustment mechanisms 5 fixedly mounted at the bottom of the composite disk 3, equidistantly surrounding the main sampler 4. Auxiliary samplers 6 are fixedly connected to the outer surfaces of each of the four adjustment mechanisms 5. Sealing disks 7 are threadedly connected to the middle of the inner walls of both the main sampler 4 and the auxiliary samplers 6. The inner wall of the bottom opening of the 6 is threaded with a combination ring 8. The top of the combination ring 8 is fixedly connected with multiple sets of triangular spring pieces 9 arranged in a ring. The top of the sealing disc 7 is fixedly connected with a waterproof electric actuator 10. The telescopic end of the waterproof electric actuator 10 moves through the ring formed by the multiple sets of triangular spring pieces 9. The telescopic end of the waterproof electric actuator 10 is fixedly connected with a steel support rod 11. Both ends of the steel support rod 11 are fixedly connected with a compression ring 12. The top of the compression ring 12 is fixedly connected with multiple sets of pull ropes 13 arranged in a ring. The tops of the multiple sets of pull ropes 13 are fixedly connected to the bottoms of the multiple sets of triangular spring pieces 9 respectively.

[0039] When using this sampler to sample sediments in a sandy substrate at the bottom of the water, when the bottom of the sampler reaches the sampling position, the waterproof electric actuator 10 is activated, causing it to retract inward. This generates an upward pulling force on the steel support rod 11. This pulling force is then transmitted to the compression ring 12, causing it to move upward a set distance. This gradually generates an upward squeezing force on the seal formed by multiple sets of triangular springs 9, causing the triangular springs 9 to gradually open. As the sampler descends deeper, sediments from the inner layer of the sandy substrate gradually enter. The sampler reaches the space inside the main sampler 4 or the auxiliary sampler 6 to achieve the purpose of sampling. When the space inside the main sampler 4 and the auxiliary sampler 6 is full, the waterproof electric push rod 10 extends downward. Then, the steel support rod 11 drives the extrusion ring 12 to move downward. At the same time, multiple sets of pull ropes 13 can generate downward pulling force on the upper part of multiple sets of triangular spring pieces 9, causing the open sets of triangular spring pieces 9 to gradually merge, so as to seal the bottom of the main sampler 4 or the auxiliary sampler 6. This effectively prevents the sample from falling down when the underwater robot lifts the sampler to a higher height.

[0040] Specifically, the sealing disc 7 is connected to the main sampler 4 or the auxiliary sampler 6 by a threaded connection, and the combined ring 8 is also connected to the main sampler 4 or the auxiliary sampler 6 by a threaded connection. This makes the sealing disc 7 and the combined ring 8 detachable. After sampling, it is convenient to remove the combined ring 8 from the inner wall of the main sampler 4 or the auxiliary sampler 6, so that the sample loaded inside the space of the main sampler 4 or the auxiliary sampler 6 falls straight down, thereby achieving the purpose of transferring the sample.

[0041] The adjustment mechanism 5 includes a locking groove post 14, a fitting post 15, a threaded rod 16, and a slider 17. The locking groove post 14 is fixedly connected to the bottom of the integrated disk 3. The fitting post 15 is rotatably connected to the inside of the locking groove post 14. The threaded rod 16 is fixedly connected to the bottom of the fitting post 15. The slider 17 is threaded onto the outer surface of the threaded rod 16, and one side of the slider 17 is fixedly connected to the outer surface of the auxiliary sampler 6.

[0042] By applying a rotational force in a set direction to the threaded rod 16, the fitting column 15 can be rotated within the space of the engaging groove column 14. At the same time, the slider 17 moves up or down along the outer surface of the threaded rod 16 following the rotation direction, thereby driving the auxiliary sampler 6 to adjust its height position. This allows the four sets of auxiliary samplers 6 to be adjusted to different height positions as needed. The application of the four sets of auxiliary samplers 6 and the main sampler 4 allows multiple tubes of sediment samples to be obtained in one sampling action, which can effectively increase the sampling volume. Furthermore, by adjusting the four sets of auxiliary samplers 6 to different height positions before sampling, it is convenient for the five sampler tubes to collect samples at different depths, providing a comparative basis for subsequent experiments and detection data.

[0043] Four sets of T-shaped columns 18 arranged in a square and equidistant pattern are fixedly installed on the top of the integrated disc 3. Supporting circular plates 19 are rotatably connected to the outer surfaces of the four sets of T-shaped columns 18. Threaded sleeves 20 are fixedly installed on one side of the top of each of the four sets of supporting circular plates 19. Fastening columns 21 are threadedly connected to the inner walls of each of the four sets of threaded sleeves 20. Supplementary counterweight plates 22 are movably fitted onto the outer surfaces of the threaded sleeves 20, with the top of the supplementary counterweight plates 22 fitting against the bottom of the top panel of the fastening columns 21. The integrated support column 1 includes a limiting base plate 23, upright columns 24, threaded grooves 25, and limiting long nails 26. The bottom of the base plate 23 is fixedly connected to the top of the combined cylinder 2, and the bottom of the upright column 24 is fixedly connected to the top of the limiting base plate 23. There are multiple sets of threaded grooves 25, which are evenly arranged vertically on the outer surface of the upright column 24. The inner wall of one set of threaded grooves 25 is threaded with a limiting long nail 26. Multiple sets of counterweight lead rings 27 arranged vertically are movably sleeved on the outer surface of the upright column 24. The bottom of the bottom set of counterweight lead rings 27 is in contact with the top of the limiting base plate 23, and the top of the top set of counterweight lead rings 27 is in contact with the bottom of the limiting long nail 26.

[0044] Based on the calculated buoyancy value of the sampling tube after it is submerged, a corresponding number of counterweight lead rings 27 and supplementary counterweight plates 22 are equipped in the sampler. First, the limiting pin 26 is removed, and then a set number of counterweight lead rings 27 are fitted onto the outer surface of the upright column 24 to increase the anti-buoyancy effect of the sampler. Then, the limiting pin 26 is inserted into the threaded groove 25 above the upper set of counterweight lead rings 27. At this time, the upper part of the counterweight lead rings 27 is limited by the limiting pin 26. Therefore, after the sampler is submerged, the counterweight lead rings 27 are not likely to fall off without reason, thus avoiding the waste of materials.

[0045] Specifically, after attaching the maximum number of counterweight lead rings 27 to the outer surface of the upright column 24, if the sampler still does not reach a weight that matches the buoyancy experienced during this descent, the height of the limiting cover ring 30 is adjusted to be at the same level as the integrated disc 3. Then, the four sets of support discs 19 are rotated outward in sequence. After that, the supplementary counterweight plates 22 with the set weight value are attached to the outer surface of the threaded sleeve 20 to supplement the overall weight of the sampler. Then, fastening columns 21 that match the overall height of the set number of supplementary counterweight plates 22 are inserted into the inside of the threaded sleeve 20. In this way, when the overall weight of the sampler does not match the water depth, the anti-buoyancy effect of the sampler is further improved by continuing to add counterweights.

[0046] The adjustment mechanism 5 also includes a turntable 28 and a lever cylinder 29. The turntable 28 is fixedly installed at the bottom of the threaded rod 16, and the lever cylinder 29 is fixedly connected to the outer surface of the turntable 28.

[0047] The outer surface of the turntable 28 is smoother than that of the threaded rod 16, and its diameter is larger than that of the threaded rod 16. As a result, it is more comfortable to apply rotational force to the threaded rod 16 through it. By holding the turntable 28 and pressing the index finger against the lever cylinder 29, the turntable 28 can be manually rotated to apply rotational force to the threaded rod 16.

[0048] The outer surface of the integrated disc 3 is provided with a threaded ring, and the outer surface of the integrated disc 3 is threadedly connected to the limiting cover ring 30 through the threaded ring. The inner wall of the limiting cover ring 30 is respectively attached to the outer surface of the four sets of supporting discs 19. The structure of the integrated support column 1 also includes a lifting ring 31, which is fixedly installed on the top of the upright column 24.

[0049] When the overall height of the N sets of supplementary counterweight plates 22 placed on the top surface of the support circular plate 19 is greater than the height of the combined cylinder 2, the support circular plate 19 needs to be rotated outward. At this time, the height of the limiting cover ring 30 is consistent with the height of the top surface of the integrated disk 3. Conversely, when no supplementary counterweight plate 22 is placed on the top of the support circular plate 19 or only one set of supplementary counterweight plates 22 is placed, the support circular plate 19 is still on the top surface of the integrated disk 3. At this time, by applying an upward rotational force to the limiting cover ring 30, its top surface is moved upward and higher than the top surface of the integrated disk 3, so as to limit the four sets of support circular plates 19 to the upper surface of the integrated disk 3.

[0050] The working steps of this multi-tube sampler are as follows:

[0051] S1. Use a depth detection device to measure the distance between the sea surface and the underwater sampling location, then calculate the maximum buoyancy force that the sampler will experience after being submerged, and then equip the sampler with a corresponding number of counterweight lead rings 27 and supplementary counterweight plates 22 according to the calculated buoyancy value.

[0052] S2. When the sampler still does not reach the weight that matches the buoyancy of the current descent after the maximum number of counterweight lead rings 27 are fitted onto the outer surface of the upright column 24, a downward rotational force is applied to the limiting cover ring 30 to make its top level with the top of the integrated disc 3. Then, a rotational force is applied to the four sets of support discs 19 in sequence to make them rotate 180° along the outer surface of the T-shaped column 18. After that, the supplementary counterweight plate 22 with the set weight value is fitted onto the outer surface of the threaded sleeve 20 to supplement the overall weight of the sampler. Then, a fastening column 21 that matches the overall height of the set number of supplementary counterweight plates 22 is inserted into the inside of the threaded sleeve 20.

[0053] S3. The staff uses a geological steel cable to pull the sampler down through the lifting ring 31. Relying on the weight of the counterweight lead ring 27, the supplementary counterweight plate 22 and other components in the sampler, the sampler is driven into the sediment at the bottom of the water. At the same time, the waterproof electric push rod 10 is operated to make it retract inward. Then, the steel support rod 11 drives the extrusion ring 12 to move upward a set distance. During the upward movement of the extrusion ring 12, it gradually exerts an upward extrusion force on the bottom formed by multiple sets of triangular spring pieces 9, causing the multiple sets of triangular spring pieces 9 to gradually open. Then, as the underwater robot drives the sampler to gradually penetrate into the inner layer of the sandy base, the sediment in the inner layer of the sandy base will gradually enter the space of the main sampler 4 or the auxiliary sampler 6.

[0054] S4. After sampling is completed, the waterproof electric actuator 10 is run again to extend downward. Then, the compression ring 12 is driven to move downward through the steel support rod 11. During this process, multiple sets of pull ropes 13 can exert downward pulling force on the upper part of multiple sets of triangular spring pieces 9, causing the open sets of triangular spring pieces 9 to gradually merge, so as to seal the bottom of the main sampler 4 or the auxiliary sampler 6.

[0055] Working principle: Workers use a geological cable to lower the sampler via a lifting ring 31. The sampler is lowered into the seabed sediment by the weight of its counterweight ring 27, supplementary counterweight plate 22, and other components. Simultaneously, the waterproof electric actuator 10 retracts inwards, which in turn moves the compression ring 12 upwards a predetermined distance via the steel support rod 11. This compression ring 12 gradually exerts upward pressure on the seal formed by multiple sets of triangular spring pieces 9, causing the multiple sets of triangular spring pieces 9 to gradually... Once opened, the underwater robot drives the sampler deeper into the inner layer of the sandy base. The sediment in the inner layer of the sandy base will gradually enter the space of the main sampler 4 or the auxiliary sampler 6. After sampling is completed, the waterproof electric push rod 10 extends downward. Through the steel support rod 11, the extrusion ring 12 and multiple sets of pull ropes 13, the upper part of multiple sets of triangular spring pieces 9 is pulled downward, causing the open sets of triangular spring pieces 9 to gradually merge, so as to seal the bottom of the main sampler 4 or the auxiliary sampler 6.

[0056] 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 multi-tube sampler for sandy substrate sediments with anti-buoyancy function, comprising a composite support (1), characterized in that: The bottom of the integrated support column (1) is fixedly connected to a combined cylinder (2), the bottom of the combined cylinder (2) is fixedly installed with a comprehensive disc (3), the bottom of the comprehensive disc (3) is fixedly installed with a main sampler (4), the bottom of the comprehensive disc (3) is fixedly installed with four sets of evenly arranged adjustment mechanisms (5), and the four sets of adjustment mechanisms (5) are equidistantly surrounding the main sampler (4). The outer surfaces of the four sets of adjustment mechanisms (5) are all fixedly connected with auxiliary samplers (6). The middle part of the inner wall of the main sampler (4) and the auxiliary sampler (6) is threaded with a sealing disc (7). The inner walls of the bottom openings of the main sampler (4) and the auxiliary sampler (6) are threaded with a sealing disc (7). The sealing disc (7) is connected with a combination ring (8), and the top of the combination ring (8) is fixedly connected with a number of triangular spring pieces (9) arranged in a ring. The top of the sealing disc (7) is fixedly connected with a waterproof electric actuator (10), and the telescopic end of the waterproof electric actuator (10) moves through the ring formed by the multiple triangular spring pieces (9). The telescopic end of the waterproof electric actuator (10) is fixedly connected with a steel support rod (11), and the two ends of the steel support rod (11) are fixedly connected with a compression ring (12). The top of the compression ring (12) is fixedly connected with a number of pull ropes (13) arranged in a ring, and the tops of the multiple pull ropes (13) are respectively fixedly connected to the bottoms of the multiple triangular spring pieces (9). The top of the integrated disc (3) is fixedly installed with four sets of T-shaped columns (18) arranged in a square and equidistant manner. The outer surfaces of the four sets of T-shaped columns (18) are rotatably connected with support circular plates (19). A threaded sleeve (20) is fixedly installed on one side of the top of the four sets of support circular plates (19). The inner walls of the four sets of threaded sleeves (20) are threadedly connected with fastening columns (21). The outer surface of the threaded sleeve (20) is movably fitted with a supplementary counterweight plate (22), and the top of the supplementary counterweight plate (22) is in contact with the bottom of the top panel of the fastening column (21). The structure of the integrated support column (1) includes a limiting base plate (23), an upright column (24), a threaded groove (25), and a limiting long nail (26). The bottom of the limiting base plate (23) is fixedly connected to the top of the combined cylinder (2), and the bottom of the upright column (24) is fixedly connected to the top of the limiting base plate (23). There are multiple sets of threaded grooves (25), which are evenly arranged on the outer surface of the upright column (24). The inner wall of one set of threaded grooves (25) is threaded with a limiting long nail (26). The outer surface of the upright column (24) is movably fitted with multiple sets of counterweight lead rings (27) arranged vertically, and the bottom of the lowest set of counterweight lead rings (27) is in contact with the top of the limiting base plate (23), and the top of the highest set of counterweight lead rings (27) is in contact with the bottom of the limiting long nail (26). The outer surface of the integrated disc (3) is provided with a threaded ring, and the outer surface of the integrated disc (3) is threadedly connected to a limiting cover ring (30) through the threaded ring, and the inner wall of the limiting cover ring (30) is respectively attached to the outer surface of the four sets of supporting discs (19).

2. The multi-tube sampler for sandy substrate sediments with anti-buoyancy function according to claim 1, characterized in that: The adjustment mechanism (5) is constructed including a locking groove column (14), a fitting column (15), a threaded rod (16), and a slider (17). The locking groove column (14) is fixedly connected to the bottom of the integrated disk (3). The fitting column (15) is rotatably connected to the inside of the locking groove column (14). The threaded rod (16) is fixedly connected to the bottom of the fitting column (15). The slider (17) is threaded onto the outer surface of the threaded rod (16), and one side of the slider (17) is fixedly connected to the outer surface of the auxiliary sampler (6).

3. A multi-tube sampler for sandy substrate sediments with anti-buoyancy function according to claim 2, characterized in that: The adjustment mechanism (5) also includes a turntable (28) and a lever cylinder (29). The turntable (28) is fixedly installed at the bottom of the threaded rod (16), and the lever cylinder (29) is fixedly connected to the outer surface of the turntable (28).

4. A multi-tube sampler for sandy substrate sediments with anti-buoyancy function according to claim 1, characterized in that: The structure of the integrated support column (1) also includes a lifting ring (31), which is fixedly installed on the top of the upright column (24).

5. A multi-tube sampler for sandy substrate sediments with anti-buoyancy function according to any one of claims 1-4, characterized in that, The working steps of this multi-tube sampler are as follows: S1. Use a depth detection device to measure the distance between the sea surface and the underwater sampling location, then calculate the maximum buoyancy of the sampler after it is launched into the water, and then equip the sampler with the corresponding number of counterweight lead rings (27) and supplementary counterweight plates (22) according to the calculated buoyancy value. S2, where, After attaching the maximum number of counterweight lead rings (27) to the outer surface of the upright column (24), if the sampler still does not reach the weight that matches the buoyancy it experiences during this descent, a downward rotational force is applied to the limiting cover ring (30) to make its top level with the top of the integrated disc (3). Then, rotational force is applied to the four sets of support discs (19) in sequence to make them rotate 180° along the outer surface of the T-shaped column (18). After that, the supplementary counterweight plate (22) with the set weight value is attached to the outer surface of the threaded sleeve (20) to supplement the overall weight of the sampler. Then, a fastening column (21) that matches the overall height of the set number of supplementary counterweight plates (22) is inserted into the inside of the threaded sleeve (20). S3. The staff used a geological steel cable to pull the sampler down through the lifting ring (31). Relying on the weight of the lead ring (27), the supplementary weight plate (22) and other components in the sampler, the sampler was driven into the sediment at the bottom of the water. At the same time, the waterproof electric push rod (10) was operated to make it retract inward. Then, the steel support rod (11) drove the extrusion ring (12) to move upward a set distance. During the upward movement of the extrusion ring (12), it gradually exerted an upward extrusion force on the bottom formed by multiple sets of triangular springs (9), causing the multiple sets of triangular springs (9) to gradually open. Then, as the underwater robot drove the sampler to gradually penetrate into the inner layer of the sandy base, the sediment in the inner layer of the sandy base would gradually enter the space of the main sampler (4) or the auxiliary sampler (6). S4. After sampling is completed, the waterproof electric actuator (10) is run again to make it extend downward. Then, the steel support rod (11) drives the extrusion ring (12) to move downward. During this process, multiple sets of pull ropes (13) can generate downward pulling force on the upper part of multiple sets of triangular springs (9), causing the open sets of triangular springs (9) to gradually merge, so as to seal the bottom of the main sampler (4) or the auxiliary sampler (6).

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