Mud sampling equipment for ocean carbon sink detection

Abstract

The invention relates to the technical field of mud sampling equipment, and discloses mud sampling equipment for ocean carbon sink detection, the mud sampling equipment comprises a sinking cylinder, a plurality of water falling holes are formed in the bottom wall of the sinking cylinder in a penetrating manner, three hanging holes are formed in the circumferential outer surface, close to the top end, of the sinking cylinder at equal intervals, and a plurality of through holes are formed in the circumferential direction of the lower surface of the sinking cylinder at equal intervals in a penetrating manner. A pressed plate moves downwards to drive a driving rod to move downwards, the driving rod drives a fixing block to move downwards, the fixing block drives a driving gear to rotate through a guide groove and a pressing rod, the driving gear drives a driven gear to rotate, the driven gear drives a sampling barrel to rotate through a hollow shaft, and the sampling barrel shovels seabed soil into the sampling barrel through a sampling notch; by means of the marine carbon sink detection mud sampling device, when marine carbon sink detection mud sampling is carried out, no complex mechanical device is needed, and the sampling cost of marine carbon sink detection is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mud mining equipment, and in particular to mud mining equipment for detecting marine carbon sinks. Background Art

[0002] Marine carbon sink (also known as "blue carbon") refers to the process and mechanism of using the ocean as a specific carrier to absorb carbon dioxide from the atmosphere and solidify it. The ocean plays a huge role in regulating global climate change, especially in absorbing greenhouse gases such as carbon dioxide. The total amount of carbon dioxide emitted into the atmosphere by human activities reaches 5.5 billion tons each year, of which about 2 billion tons are absorbed by the ocean, and only about 700 million tons are absorbed by terrestrial ecosystems. Mud sampling equipment for marine carbon sink detection is usually used to evaluate and monitor the carbon storage capacity in marine sediments.

[0003] Existing mud sampling equipment for marine carbon sink detection usually adopts grab-type mud samplers or piston-type samplers to effectively extract sediment samples from the seabed. Since the sea water is deeper during deep-sea sampling, longer grab arms and pipelines are required when sampling with grab-type mud samplers or piston-type samplers, resulting in higher requirements for the equipment, which greatly increases the cost of sea mud sampling for marine carbon sink detection. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a mud sampling device for marine carbon sink detection.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A mud sampling equipment for detecting marine carbon sinks comprises a sinking cylinder, a bottom wall of the sinking cylinder is penetrated with a plurality of water drop holes, a circumferential outer surface of the sinking cylinder near the top is equidistantly provided with three hanging holes, a circumferential direction of the lower surface of the sinking cylinder is penetrated with a plurality of through holes equidistantly provided, the inner walls of the plurality of through holes are fixedly installed with a mounting cylinder, a sampling cylinder is rotatably installed between the inner walls at opposite ends of the mounting cylinder, a sampling notch is provided on the circumferential outer surface of the sampling cylinder, the same sampling notch is provided on the circumferential outer surface of the mounting cylinder near the bottom, a hollow shaft is fixedly installed on the outer surface of the two ends of the sampling cylinder near the rotation center, one end of the hollow shaft penetrates the outer surface of the mounting cylinder and a driven gear is fixedly installed, two driving gears are symmetrically rotatably installed on the outer surfaces of the opposite ends of the mounting cylinder, the driving gear is meshed with the driven gear, connecting rods are fixedly installed on the outer surfaces of the two driving gears near the mounting cylinder, and a pressure rod is fixedly installed between the outer surfaces of the two connecting rods near the top.

[0007] As a further solution of the present invention, a fixed cylinder is fixedly installed on the bottom wall in the middle position of the sinking cylinder, the bottom end of the fixed cylinder passes through the lower surface of the sinking cylinder, a partition is fixedly installed on the inner wall of the fixed cylinder near the middle, a pressure plate is slidably installed on the inner wall of the fixed cylinder near the top, the fixed cylinder is divided into a sealed cavity by the partition and the pressure plate, a one-way air outlet valve is fixedly installed on the lower surface of the partition, a first spring is fixedly installed on the lower surface of the pressure plate, and the bottom end of the first spring is fixedly installed on the upper surface of the partition.

[0008] As a further solution of the present invention, a plurality of first limit sleeves are equidistantly fixedly installed on the circumferential outer surface of the fixed cylinder near the top, and a driving rod is slidably installed on the inner walls of the plurality of first limit sleeves. The top end of the driving rod is fixedly installed on the upper surface of the pressure plate, and a fixed block is fixedly installed on the bottom end of the driving rod. A guide groove is penetrated on the outer surface of the fixed block, and the pressure rod is slidably installed on the inner wall of the guide groove.

[0009] As a further solution of the present invention, multiple groups of second limit sleeves are equidistantly fixedly installed in the circumferential direction of the bottom wall of the caisson, and the inner walls of a group of two second limit sleeves are slidably installed with sliding rods. A plug is fixedly installed at one end of the sliding rod close to the hollow shaft, and the plug is matched with the inner hole of the hollow shaft. A driving groove is provided on the outer surface of the other end of the sliding rod, and the driving groove is inclined. Two connecting rods are symmetrically fixedly installed on the lower surface of the fixed block, and driving columns are fixedly installed on the outer surfaces of the two connecting rods close to the bottom, and the driving columns are slidably installed on the inner wall of the driving groove.

[0010] As a further solution of the present invention, a plurality of limit mounting blocks are equidistantly fixedly installed between the inner walls of the fixed cylinder near the bottom end, and a limit column is slidably inserted into the inner walls of the plurality of limit mounting blocks. The bottom end of the limit column passes through the lower surface of the limit mounting block and a bottom plate is fixedly installed thereon. A second spring is sleeved on the outer surface of the limit column, and the second spring is arranged between the bottom plate and the limit mounting block. A gap is provided between the bottom plate and the inner wall of the fixed cylinder.

[0011] As a further solution of the present invention, a plurality of openings are equidistantly provided on the circumferential outer surface of the fixed cylinder near the bottom, and a rotating rod is rotatably installed on the top walls of the plurality of openings, and the rotating rod is arranged below the fixed block, and a top wheel is rotatably installed between the inner walls of the rotating rod near one end of the fixed block, and the top wheel abuts against the lower surface of the fixed block, and an inclined rod is fixedly installed on the lower surface of the other end of the rotating rod, and the inclined rod is inclinedly arranged, and a baffle is fixedly installed on the top end of the limit column passing through the upper surface of the limit mounting block, and two clamping rods are fixedly installed on the circumferential outer surface of the baffle, and a gap is provided between the two clamping rods, and the oblique rod is arranged between the two clamping rods and slidably installed therewith.

[0012] As a further solution of the present invention, a gas valve is fixedly installed on the circumferential outer surface of the fixed cylinder, the gas valve is connected to the interior of the fixed cylinder, and the gas valve is arranged between the pressure plate and the partition.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The pressure plate moves downward to drive the driving rod downward, the driving rod drives the fixed block downward, the fixed block drives the driving gear to rotate through the guide groove and the pressure rod, the driving gear drives the driven gear to rotate, the driven gear drives the sampling tube to rotate through the hollow shaft, the sampling tube shovels the mud on the seabed into the inside through the sampling notch, and seals with the mounting tube to keep the sample mud inside the sampling tube. Through this device, no complicated mechanical device is required when sampling mud for marine carbon sink detection, which greatly reduces the sampling cost of marine carbon sink detection;

[0015] 2. The downward movement of the fixed block drives the connecting rod to move downward, and the connecting rod drives the two sliding rods to move closer to each other through the driving column and the driving groove. The two sliding rods drive the plug to seal the port of the hollow shaft to prevent the sample soil from flowing out of the port. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a mud sampling device for marine carbon sink detection proposed by the present invention;

[0017] Figure 2 This is a schematic diagram of the upward structure of a mud sampling device for marine carbon sink detection proposed by the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of a mud sampling device for marine carbon sink detection proposed by the present invention;

[0019] Figure 4 This is a schematic cross-sectional view of a mud sampling device for marine carbon sink detection proposed by the present invention;

[0020] Figure 5 A schematic diagram of a sampling tube of a mud sampling device for detecting marine carbon sinks proposed by the present invention;

[0021] Figure 6 A schematic diagram of a pressure rod of a mud sampling device for marine carbon sink detection proposed by the present invention;

[0022] Figure 7 A schematic diagram of a rotating rod of a mud sampling device for detecting marine carbon sinks proposed by the present invention;

[0023] Figure 8 A schematic diagram of a top wheel of a mud sampling device for detecting marine carbon sinks proposed by the present invention;

[0024] Fig. 9This is a schematic diagram of an inclined rod of a mud sampling device for marine carbon sink detection proposed by the present invention.

[0025] In the figure: 1. sinking cylinder; 2. mounting cylinder; 3. sampling cylinder; 4. bottom plate; 5. fixing cylinder; 501. partition; 502. first spring; 503. one-way air outlet valve; 6. pressure plate; 7. first limit sleeve; 8. driving rod; 9. fixing block; 10. pressure rod; 11. connecting rod; 12. driving gear; 13. driven gear; 14. hollow shaft; 15. second limit sleeve; 16. sliding rod; 17. driving groove; 18. driving column; 19. connecting rod; 20. plug; 21. guide groove; 22. limit mounting block; 23. limit column; 24. second spring; 25. baffle; 26. clamping rod; 27. rotating rod; 28. inclined rod; 29. ​​top wheel; 30. opening; 31. gas valve; 32. water drop hole; 33. hanging hole. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Reference Figure 1-Figure 9A mud sampling device for detecting marine carbon sinks comprises a sinking cylinder 1, a plurality of water drop holes 32 are penetrated through the bottom wall of the sinking cylinder 1, three hanging holes 33 are equidistantly provided on the circumferential outer surface of the sinking cylinder 1 near the top, a plurality of through holes are equidistantly penetrated through the circumferential direction of the lower surface of the sinking cylinder 1, a mounting cylinder 2 is fixedly installed on the inner wall of the plurality of through holes, a sampling cylinder 3 is rotatably installed between the inner walls at the opposite ends of the mounting cylinder 2, a sampling notch is provided on the circumferential outer surface of the sampling cylinder 3, the same sampling notch is provided on the circumferential outer surface of the mounting cylinder 2 near the bottom, a hollow shaft 14 is fixedly installed on the outer surface of the two ends of the sampling cylinder 3 near the rotation center, one end of the hollow shaft 14 penetrates through the outer surface of the mounting cylinder 2 and a driven gear 13 is fixedly installed, two driving gears 12 are symmetrically rotatably installed on the outer surfaces of the opposite ends of the mounting cylinder 2, the driving gear 12 is meshed with the driven gear 13, connecting rods 11 are fixedly installed on the outer surfaces of the two driving gears 12 near the mounting cylinder 2, and the two connecting rods 11 are near the top A pressure rod 10 is fixedly installed between the outer surfaces of the ends, a fixed cylinder 5 is fixedly installed on the bottom wall at the middle position of the sinking cylinder 1, the bottom end of the fixed cylinder 5 passes through the lower surface of the sinking cylinder 1, a partition 501 is fixedly installed on the inner wall of the fixed cylinder 5 near the middle, a pressure plate 6 is slidably installed on the inner wall of the fixed cylinder 5 near the top, the fixed cylinder 5 is divided into a sealed cavity by the partition 501 and the pressure plate 6, a one-way air outlet valve 503 is fixedly installed on the lower surface of the partition 501, and a first pressure plate 6 is fixedly installed on the lower surface of the pressure plate 6. A spring 502, the bottom end of the first spring 502 is fixedly installed on the upper surface of the partition 501, and a plurality of first limit sleeves 7 are fixedly installed at equal distances on the circumferential outer surface of the fixed cylinder 5 near the top, and a driving rod 8 is slidably installed on the inner walls of the plurality of first limit sleeves 7, and the top end of the driving rod 8 is fixedly installed on the upper surface of the pressure plate 6, and a fixing block 9 is fixedly installed on the bottom end of the driving rod 8, and a guide groove 21 is penetrated on the outer surface of the fixing block 9, and the pressure rod 10 is slidably installed on the inner wall of the guide groove 21.

[0030] The pressure of seawater on the upper surface of the pressure plate 6 causes the pressure plate 6 to move downward. When the pressure plate 6 moves downward, the air inside the fixed tube 5 will be discharged from the one-way air outlet valve 503. The downward movement of the pressure plate 6 drives the driving rod 8 to move downward, and the driving rod 8 drives the fixed block 9 to move downward. The fixed block 9 drives the driving gear 12 to rotate through the guide groove 21 and the pressure rod 10. The driving gear 12 drives the driven gear 13 to rotate. The driven gear 13 drives the sampling tube 3 to rotate through the hollow shaft 14. The sampling tube 3 shovels the soil on the seabed into the interior through the sampling notch, and is sealed with the mounting tube 2 to keep the sample soil inside the sampling tube 3.

[0031] In this embodiment, a plurality of groups of second limit sleeves 15 are equidistantly fixedly installed in a circumferential direction of the bottom wall of the caisson 1, and a slide rod 16 is slidably installed on the inner wall of a group of two second limit sleeves 15. A plug 20 is fixedly installed at one end of the slide rod 16 close to the hollow shaft 14, and the plug 20 is matched with the inner hole of the hollow shaft 14. A driving groove 17 is provided on the outer surface of the other end of the slide rod 16, and the driving groove 17 is inclined. Two connecting rods 19 are symmetrically fixedly installed on the lower surface of the fixed block 9, and a driving column 18 is fixedly installed on the outer surface of the two connecting rods 19 close to the bottom, and the driving column 18 is slidably installed with the inner wall of the driving groove 17.

[0032] The downward movement of the fixed block 9 drives the connecting rod 19 to move downward, and the connecting rod 19 drives the two sliding rods 16 to move closer to each other through the driving column 18 and the driving groove 17. The two sliding rods 16 drive the plug 20 to seal the port of the hollow shaft 14 to prevent the sample soil from flowing out of the port.

[0033] In this embodiment, a plurality of limit mounting blocks 22 are fixedly installed equidistantly between the inner walls of the fixed cylinder 5 near the bottom end, and the inner walls of the plurality of limit mounting blocks 22 are slidably inserted with limit columns 23. The bottom ends of the limit columns 23 penetrate through the lower surfaces of the limit mounting blocks 22 and are fixedly installed with a bottom plate 4. The outer surfaces of the limit columns 23 are sleeved with a second spring 24, which is arranged between the bottom plate 4 and the limit mounting blocks 22. A gap is provided between the bottom plate 4 and the inner wall of the fixed cylinder 5, and the gas is discharged through the gap. A plurality of openings 30 are equidistantly provided on the circumferential outer surface of the fixed cylinder 5 near the bottom, and the plurality of openings 30 are equidistantly provided. 0 is rotatably mounted with a rotating rod 27 on the top wall, and the rotating rod 27 is arranged below the fixed block 9. A top wheel 29 is rotatably mounted between the inner wall of the rotating rod 27 near one end of the fixed block 9, and the top wheel 29 abuts against the lower surface of the fixed block 9. An inclined rod 28 is fixedly mounted on the lower surface of the other end of the rotating rod 27, and the inclined rod 28 is tilted. The top end of the limiting column 23 passes through the upper surface of the limiting mounting block 22 and is fixedly mounted with a baffle 25. Two clamping rods 26 are fixedly mounted on the circumferential outer surface of the baffle 25. A gap is provided between the two clamping rods 26, and the inclined rod 28 is arranged between the two clamping rods 26 and slidably mounted therewith.

[0034] When the submerged cylinder 1 is about to contact the seabed, the bottom plate 4 contacts the seabed first, and then the submerged cylinder 1 will continue to sink under the action of gravity. At this time, the limit column 23 moves upward relative to the submerged cylinder 1, and the blocking piece 25 is driven upward by the limit column 23. The blocking piece 25 drives the rotating rod 27 to rotate through the clamping rod 26 and the inclined rod 28. The rotating rod 27 drives the top wheel 29 to leave the lower surface of the fixed block 9. When the bottom surface of the submerged cylinder 1 contacts the seabed, the top wheel 29 leaves the lower surface of the fixed block 9.

[0035] In this embodiment, a gas valve 31 is fixedly installed on the circumferential outer surface of the fixed cylinder 5 . The gas valve 31 is communicated with the interior of the fixed cylinder 5 . The gas valve 31 is disposed between the pressure plate 6 and the partition plate 501 .

[0036] When the sinking cylinder 1 is out of water, a collecting box is placed under the sampling cylinder 3, and the operator manually opens the gas valve 31 to allow air to enter the sealed cavity. At this time, the pressure plate 6 is reset under the action of the first spring 502, and the bottom plate 4 is reset under the action of the second spring 24.

[0037] In this embodiment, the hollow shaft 14 allows the air remaining inside the sampling tube 3 to be discharged during sampling.

[0038] It should be noted that when the present invention is in use, the operator connects the lifting rope on the sampling ship to the submerged cylinder 1 through the hanging hole 33, then drives the ship to the designated area on the sea, and slowly places the submerged cylinder 1 on the seabed through the lifting rope; when the submerged cylinder 1 is about to contact the seabed, the bottom plate 4 contacts the seabed first, and then the submerged cylinder 1 will continue to sink under the action of gravity. At this time, the limit column 23 moves up relative to the submerged cylinder 1, and the blocking piece 25 is driven to move up through the limit column 23. The blocking piece 25 drives the rotating rod 27 to rotate through the clamping rod 26 and the inclined rod 28, and the rotating rod 27 drives the top wheel 29 to leave the lower surface of the fixed block 9. When the bottom surface of the submerged cylinder 1 When in contact with the seabed, the top wheel 29 leaves the lower surface of the fixed block 9. At this time, the pressure of the seawater on the upper surface of the pressure plate 6 causes the pressure plate 6 to move downward. When the pressure plate 6 moves downward, the air inside the fixed cylinder 5 will be discharged from the one-way air outlet valve 503, and the downward movement of the pressure plate 6 drives the driving rod 8 to move downward, and the driving rod 8 drives the fixed block 9 to move downward. The fixed block 9 drives the driving gear 12 to rotate through the guide groove 21 and the pressure rod 10, and the driving gear 12 drives the driven gear 13 to rotate. The driven gear 13 drives the sampling cylinder 3 to rotate through the hollow shaft 14. The sampling cylinder 3 shovels the mud on the seabed into its interior through the sampling notch, and The sample soil is retained in the sampling tube 3 by the sealing with the mounting tube 2, and the connecting rod 19 is driven downward by the downward movement of the fixing block 9, and the connecting rod 19 drives the two sliding rods 16 to move closer to each other through the driving column 18 and the driving groove 17, and the two sliding rods 16 drive the plug 20 to seal the port of the hollow shaft 14 to prevent the sample soil from flowing out of the port; after the sampling is completed, the operator lifts the submerged tube 1 from the seabed by the lifting rope, and due to the setting of the one-way air outlet valve 503, the gas in the sealed chamber will form a negative pressure after being discharged, and at the same time, a section of the fixing tube 5 located above the pressure plate 6 is filled with seawater, which is The pressure plate 6 will not move, ensuring that the sea mud samples can be collected safely. When the submerged cylinder 1 is out of water, a collection box is placed under the sampling cylinder 3, and the operator manually opens the gas valve 31 to allow air to enter the sealed cavity. At this time, the pressure plate 6 is reset under the action of the first spring 502, and the bottom plate 4 is reset under the action of the second spring 24. At the same time, the sample soil inside the sampling cylinder 3 will flow into the collection box from the sampling notch, which is convenient for subsequent detection. Through this device, there is no need for complex mechanical devices when sampling mud for marine carbon sink detection, which greatly reduces the sampling cost of marine carbon sink detection.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A mud sampling device for marine carbon sink detection, comprising a sinker (1), a bottom wall of the sinker (1) having a plurality of water drop holes (32) formed therethrough, and a circular outer surface of the sinker (1) near the top having three hanging holes (33) formed thereon at equal intervals, characterized in that: A plurality of through holes are equidistantly penetrated in the circumferential direction of the lower surface of the sinking cylinder (1), and a mounting cylinder (2) is fixedly installed on the inner walls of the plurality of through holes. A sampling cylinder (3) is rotatably installed between the inner walls at opposite ends of the mounting cylinder (2), and a sampling notch is provided on the circumferential outer surface of the sampling cylinder (3). The same sampling notch is provided on the circumferential outer surface of the mounting cylinder (2) near the bottom. A hollow shaft (14) is fixedly installed on the outer surface of the two ends of the sampling cylinder (3) near the rotation center, and one end of the hollow shaft (14) penetrates through the outer surface of the mounting cylinder (2) and is fixedly installed with a driven gear (13). Two driving gears (12) are symmetrically rotatably installed on the outer surfaces of the two opposite ends of the mounting cylinder (2), and the driving gear (12) is meshed with the driven gear (13). Connecting rods (11) are fixedly installed on the outer surfaces of the two driving gears (12) near the mounting cylinder (2), and a pressure rod (10) is fixedly installed between the outer surfaces of the two connecting rods (11) near the top.

2. A mud sampling device for marine carbon sink detection according to claim 1, characterized in that: A fixed cylinder (5) is fixedly installed on the bottom wall in the middle position of the sinking cylinder (1), and the bottom end of the fixed cylinder (5) passes through the lower surface of the sinking cylinder (1). A partition (501) is fixedly installed on the inner wall of the fixed cylinder (5) near the middle, and a pressure plate (6) is slidably installed on the inner wall of the fixed cylinder (5) near the top. The fixed cylinder (5) is divided into a sealed cavity by the partition (501) and the pressure plate (6), and a one-way air outlet valve (503) is fixedly installed on the lower surface of the partition (501), and a first spring (502) is fixedly installed on the lower surface of the pressure plate (6), and the bottom end of the first spring (502) is fixedly installed on the upper surface of the partition (501).

3. A mud sampling device for marine carbon sink detection according to claim 2, characterized in that: A plurality of first limiting sleeves (7) are equidistantly fixedly installed on the circumferential outer surface of the fixed cylinder (5) near the top end, and a driving rod (8) is slidably installed on the inner walls of the plurality of first limiting sleeves (7). The top end of the driving rod (8) is fixedly installed on the upper surface of the pressure plate (6), and a fixing block (9) is fixedly installed on the bottom end of the driving rod (8). A guide groove (21) is penetrated through the outer surface of the fixing block (9), and the pressure rod (10) is slidably installed on the inner wall of the guide groove (21).

4. A mud sampling device for marine carbon sink detection according to claim 3, characterized in that: A plurality of groups of second limiting sleeves (15) are fixedly installed in pairs at equal intervals in the circumferential direction of the bottom wall of the sinker (1), and a sliding rod (16) is slidably installed on the inner wall of each group of two second limiting sleeves (15). A plug (20) is fixedly installed at one end of the sliding rod (16) close to the hollow shaft (14), and the plug (20) is matched with the inner hole of the hollow shaft (14). A driving groove (17) is provided on the outer surface of the other end of the sliding rod (16), and the driving groove (17) is inclined. Two connecting rods (19) are symmetrically fixedly installed on the lower surface of the fixed block (9), and a driving column (18) is fixedly installed on the outer surface of the two connecting rods (19) close to the bottom, and the driving column (18) is slidably installed on the inner wall of the driving groove (17).

5. A mud sampling device for marine carbon sink detection according to claim 4, characterized in that: A plurality of limit mounting blocks (22) are fixedly installed at equal intervals between the inner walls of the fixed cylinder (5) near the bottom end, and a limit column (23) is slidably inserted into the inner walls of the plurality of limit mounting blocks (22). The bottom ends of the limit columns (23) penetrate through the lower surfaces of the limit mounting blocks (22) and are fixedly installed with a bottom plate (4). A second spring (24) is sleeved on the outer surface of the limit column (23), and the second spring (24) is arranged between the bottom plate (4) and the limit mounting block (22). A gap is provided between the bottom plate (4) and the inner wall of the fixed cylinder (5).

6. A mud sampling device for marine carbon sink detection according to claim 5, characterized in that: The fixed cylinder (5) is provided with a plurality of openings (30) at equal intervals on the circumferential outer surface near the bottom, and the top walls of the plurality of openings (30) are rotatably mounted with a rotating rod (27), and the rotating rod (27) is arranged below the fixed block (9), and a top wheel (29) is rotatably mounted between the inner wall of one end of the rotating rod (27) near the fixed block (9), and the top wheel (29) abuts against the lower surface of the fixed block (9), and an inclined rod (28) is fixedly mounted on the lower surface of the other end of the rotating rod (27), and the inclined rod (28) is inclinedly arranged, and the top end of the limiting column (23) passes through the upper surface of the limiting mounting block (22) and is fixedly mounted with a baffle (25), and the circumferential outer surface of the baffle (25) is fixedly mounted with two clamping rods (26), and a gap is provided between the two clamping rods (26), and the inclined rod (28) is arranged between the two clamping rods (26) and is slidably mounted therewith.

7. The mud sampling equipment for marine carbon sink detection according to claim 1 is characterized in that: A gas valve (31) is fixedly mounted on the circumferential outer surface of the fixed cylinder (5), the gas valve (31) is connected to the interior of the fixed cylinder (5), and the gas valve (31) is arranged between the pressure plate (6) and the partition plate (501).

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