Extraction type deep-sea sediment pore water collecting device

Abstract

The invention discloses an extraction type deep-sea sediment pore water collecting device, which relates to the technical field of ocean engineering equipment, and comprises a sampling contact pin, a contact pin indicating plate, an integrated mounting plate, a negative pressure extraction device, a protective cylinder, a sample collecting tube, a mechanical drive plate and a drive plate driving device, the sampling contact pin comprises a contact pin cylinder, a penetration conical head and a filtering assembly, the contact pin cylinder is provided with a sampling side wall, a plurality of sampling interfaces are formed in the sampling side wall in the height direction, the filtering assembly is fixed to the outer side of the sampling side wall, the contact pin indicator plate is arranged on the contact pin cylinder in a sleeving mode, and a plurality of negative pressure extraction devices are fixedly installed on the integrated installation plate in the circumferential direction. The negative pressure extraction device is provided with an extraction starting plectrum and a negative pressure extraction interface, one end of the sample collection tube is connected with the sampling interface, and the other end is connected with the negative pressure extraction interface; the mechanical drive plate is rotationally connected into the protection barrel, and a drive part corresponding to the extraction starting drive piece is arranged on the periphery of the mechanical drive plate. The device is excellent in sealing performance, can collect many water samples, and can ensure high efficiency and stability of pore water sampling.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering equipment, and in particular to an extraction-type deep-sea sediment pore water collection device. Background Art

[0002] Marine sediments, as important marine natural resources, contain not only abundant mineral and microbial resources but also significant reserves of natural gas hydrates. Pore water is the aqueous solution found between seafloor sediment particles or between rock fragments. As the medium connecting seawater and sediment, pore water is a crucial site for physical, chemical, and biological reactions within seafloor sediments. It frequently exchanges substances with the sediments, reflecting their current state.

[0003] The composition of pore water in seafloor sediments primarily consists of organic and inorganic molecules, as well as anions and cations, and is influenced by the combined effects of biogeochemical and geological processes. Therefore, analyzing the physical and chemical properties of sediment pore water and studying its various geochemical characteristics has important theoretical and practical implications for revealing the characteristics and evolution of deep-sea environments. Furthermore, the collection and analysis of deep-sea pore water provides a rapid and efficient scientific basis for the exploration and development of deep-sea resources such as natural gas hydrates.

[0004] However, the harsh, dynamically changing deep-sea environment of low temperature, high pressure, and high corrosion poses a significant challenge to the in-situ collection of pore water samples. In the past, indirect sampling was the most common method for extracting pore water, where sediments were first collected and then extracted in onshore laboratories through methods such as squeezing, centrifugation, and vacuum filtration. This type of sampling method can easily lead to the escape of gases dissolved in the pore water, the decomposition of organic components, and the oxidation of variable-valence ions. This makes it difficult to reflect the original composition and information of the pore water, resulting in inconsistent measurement data with actual conditions and hindering long-term positioning research.

[0005] To obtain large quantities of multi-layered, airtight, and contamination-free porewater samples with in-situ characteristics, deep-sea sediment porewater in-situ sampling technology and related equipment have been widely used. In-situ sampling technology can maximize the preservation of sample integrity during the sampling process, preventing contamination or changes in internal components. However, existing porewater collection devices suffer from poor sealing and limited sample collection, making them inadequate for research needs. Therefore, there is an urgent need for a deep-sea sediment porewater collection device to ensure efficient and stable porewater sampling. Summary of the Invention

[0006] The purpose of the present invention is to provide an extractable deep-sea sediment pore water sampling device to solve the problems existing in the above-mentioned prior art. It has excellent sealing performance, collects a large number of water samples, and can ensure efficient and stable pore water sampling.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides an extractable deep-sea sediment pore water sampling device, comprising a sampling pin, a pin indicator plate, an integrated mounting plate, a negative pressure extraction device, a protective tube, a sample collection tube, a mechanical dial, and a dial drive device;

[0009] The sampling needle includes a needle barrel, a penetration cone head, and a filter assembly. The upper end of the needle barrel is fixed to the lower end of the protective barrel. The needle barrel is provided with a plurality of clamping grooves along the height direction. The needle barrel has a sampling side wall. The sampling side wall is provided with a plurality of sampling interfaces at intervals along the height direction. The filter assembly is fixedly arranged on the outer side of the sampling side wall. The penetration cone head is fixed to the lower end of the needle barrel.

[0010] The pin indicator plate is sleeved on the pin cylinder, and an elastic card block is fixed on the pin indicator plate. When the pin indicator plate moves along the pin cylinder, the elastic card block can be elastically snapped into the snap-in groove of the corresponding height;

[0011] The integrated mounting plate is fixedly mounted in the protective tube, and a plurality of negative pressure extraction devices are fixedly mounted on the integrated mounting plate along the circumferential direction;

[0012] The negative pressure extraction device has an extraction start paddle and a negative pressure extraction interface;

[0013] One end of the sample collection tube is connected to the sampling interface through an inlet one-way valve, and the other end is connected to the negative pressure extraction interface through an outlet one-way valve;

[0014] The mechanical dial is rotatably connected in the protective tube, the dial driving device is connected to the mechanical dial and is used to drive the mechanical dial to rotate, and the outer periphery of the mechanical dial is provided with a dial portion corresponding to each of the extraction and activation paddles.

[0015] In one embodiment, the filter assembly includes a support plate, a cover plate and a filter membrane. The support plate is fixedly arranged on the outside of the sampling side wall, and the cover plate is fixedly arranged on the outside of the support plate. The support plate and the cover plate are provided with multiple rows of holes in the height direction, and the holes in each row correspond to each other one by one. The filter membrane is arranged between the support plate and the cover plate.

[0016] In one embodiment, a sealing ring groove is provided on the outer periphery of each row of holes on both side surfaces of the support plate, and a sealing ring is installed in the sealing ring groove.

[0017] In one embodiment, the negative pressure extraction device includes an extraction cylinder, a piston, a piston rod, a spring, a spring sleeve and an extraction start paddle. One end of the extraction cylinder has a negative pressure extraction interface, the piston sliding seal is arranged in the extraction cylinder, the piston rod is fixed to the end of the piston facing away from the negative pressure extraction interface, the piston rod extends into the spring sleeve, the spring is arranged in the spring sleeve and sleeved on the piston rod, the extraction start paddle is fixed on the piston rod, the two ends of the spring are respectively against the extraction start paddle and the inner bottom surface of the spring sleeve, an L-shaped slot is provided on the side wall of the spring sleeve, the extraction start paddle extends outward through the L-shaped slot, and the extraction cylinder and the spring sleeve are both fixedly mounted on the integrated mounting plate.

[0018] In one embodiment, the dial portion is a tooth groove provided on the outer periphery of the mechanical dial, and the extraction start paddle extends into the tooth groove.

[0019] In one embodiment, the dial driving device includes a driving motor, a driving gear and a driven gear, the driving motor is fixedly installed in the protective tube, the driving gear is fixedly installed on the output shaft of the driving motor, and the driven gear is fixedly installed on the mechanical dial and meshes with the driving gear.

[0020] In one embodiment, the protective cylinder includes a protective cylinder body, a reel seat, a support rod and an upper cover, the reel seat is fixed to the lower end of the protective cylinder body, the upper cover is fixed to the upper end of the protective cylinder body, and the reel seat and the upper cover are connected through the support rod.

[0021] In one embodiment, a limit baffle is fixedly provided at the lower end of the pin cylinder for limiting and blocking the pin indicator plate.

[0022] In one embodiment, a top cover is fixedly provided on the upper end of the spring sleeve.

[0023] In one embodiment, the sample collection tube is a transparent polytetrafluoroethylene tube.

[0024] Compared with the prior art, the present invention has achieved the following technical effects:

[0025] The present invention provides an extractable deep-sea sediment pore water sampling device. A sampling needle is inserted into the seabed sediment. A dial drive device drives a mechanical dial to rotate, and the extraction start paddle is turned, causing the negative pressure extraction device to activate the negative pressure suction function. Under the negative pressure suction action of the negative pressure extraction device, the sediment pore water around the sampling needle is filtered by the filter assembly and then enters the sample collection tube through the sampling interface and the inlet one-way valve, thereby achieving pore water sample collection. Multiple negative pressure extraction devices can simultaneously achieve sample collection from multiple sample collection tubes, collecting a large number of water samples. The provision of the inlet one-way valve and the outlet one-way valve can prevent leakage of the collected sample in the sample collection tube, providing excellent sealing performance and ensuring efficient and stable pore water sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Schematic diagram of the structure of the extractable deep-sea sediment pore water sampling device in an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the internal structure of the extractable deep-sea sediment pore water sampling device in an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the structure of the sampling pin in the embodiment of the present invention;

[0030] Figure 4 is a schematic structural diagram of an integrated mounting plate in an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of the structure of the negative pressure extraction device in an embodiment of the present invention;

[0032] Figure 6 Schematic diagram of the cross-sectional structure of the negative pressure extraction device in an embodiment of the present invention;

[0033] Figure 7 is a schematic structural diagram of a mechanical dial in an embodiment of the present invention;

[0034] Figure 8 Schematic diagram of the structure of the pin indicator board in an embodiment of the present invention.

[0035] In the figure: 1-sampling pin, 2-pin indicator plate, 3-integrated mounting plate, 4-negative pressure extraction device, 5-protective cylinder, 6-mechanical dial, 7-dial drive device, 8-pin cylinder, 9-penetration cone head, 10-sampling side wall, 11-sampling interface, 12-extraction start paddle, 13-negative pressure extraction interface, 14-dial part, 15-support plate, 16-cover plate, 17-hole, 18-sealing ring groove, 19-extraction cylinder, 20-piston, 21-piston rod, 22-spring, 23-spring sleeve, 24-L-shaped slot, 25-drive motor, 26-driving gear, 27-driven gear, 28-protective cylinder, 29-reel seat, 30-support rod, 31-upper cover, 32-limit baffle, 33-top cover. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] The purpose of the present invention is to provide an extractable deep-sea sediment pore water sampling device to solve the problems existing in the prior art. It has excellent sealing performance, can collect a large number of water samples, and can ensure efficient and stable pore water sampling.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figures 1-8 As shown, this embodiment provides an extractable deep-sea sediment pore water sampling device, comprising a sampling pin 1, a pin indicator plate 2, an integrated mounting plate 3, a negative pressure extraction device 4, a protective tube 5, a sample collection tube, a mechanical dial 6, and a dial drive device 7;

[0040] The sampling needle 1 includes a needle barrel 8, a penetration cone 9, and a filter assembly. The needle barrel 8 is a square barrel. The upper end of the needle barrel 8 is fixed to the lower end of the protective barrel 5. The needle barrel 8 is provided with multiple snap-in grooves along the height direction. The needle barrel 8 has a sampling side wall 10. The sampling side wall 10 is provided with multiple sampling interfaces 11 at intervals along the height direction. Pore water can flow through them. Specifically, 24 sampling interfaces 11 are provided in this embodiment. The filter assembly is fixedly arranged on the outside of the sampling side wall 10 to filter the pore water. The penetration cone 9 is fixed to the lower end of the needle barrel 8. The penetration cone 9 can increase the penetration degree of the sampling needle 1, making it easier to insert the sampling needle 1 into the seabed sediment under the action of gravity.

[0041] The pin indicator plate 2 is sleeved on the pin barrel 8. An elastic block is fixed on the pin indicator plate 2. When the pin indicator plate 2 moves along the pin barrel 8, the elastic block can be elastically snapped into the snap-in groove of the corresponding height. Under the action of external force, the pin indicator plate 2 can move along the pin barrel 8. When the pin barrel 8 is inserted into the sediment, the pin indicator plate 2 moves upward and is always flush with the mud surface. After the pin barrel 8 is pulled out, the pin indicator plate 2 is kept in place by the elastic block snapping into the snap-in groove of the corresponding height. The penetration depth of the sampling pin 1 can be obtained according to the relative position of the pin indicator plate 2.

[0042] The integrated mounting plate 3 is fixedly mounted in the protective tube 5. A plurality of negative pressure extraction devices 4 are fixedly mounted on the integrated mounting plate 3 along the circumferential direction. Specifically, in this embodiment, 24 negative pressure extraction devices 4 are mounted on the integrated mounting plate 3.

[0043] The negative pressure extraction device 4 has an extraction start paddle 12 and a negative pressure extraction interface 13;

[0044] One end of the sample collection tube is connected to the sampling interface 11 through an inlet one-way valve, and the other end is connected to the negative pressure extraction interface 13 through an outlet one-way valve. In this embodiment, 24 sample collection tubes are provided, and one end of each sample collection tube is connected to a sampling interface 11 and the other end is connected to a negative pressure extraction device 4.

[0045] The mechanical dial 6 is rotatably connected in the protective tube 5. The dial driving device 7 is connected to the mechanical dial 6 for driving the mechanical dial 6 to rotate. The outer periphery of the mechanical dial 6 is provided with a dial portion 14 corresponding to each extraction start paddle 12.

[0046] After the sampling needle 1 is inserted into the seabed sediment, the mechanical dial 6 is rotated via the dial drive device 7, and the extraction activation paddles 12 are simultaneously activated via the toggle portion 14, causing the negative pressure extraction device 4 to activate the negative pressure suction function. Under the negative pressure suction of the negative pressure extraction device 4, the sediment pore water surrounding the sampling needle is filtered by the filter assembly and then enters the sample collection tube through the sampling interface and the inlet check valve, thereby collecting pore water samples. Using multiple negative pressure extraction devices, samples can be collected from multiple sample collection tubes simultaneously, collecting a large number of water samples. The provision of the inlet and outlet check valves prevents leakage of the collected samples in the sample collection tubes, providing excellent sealing and ensuring efficient and stable pore water sampling.

[0047] In this embodiment, the filter assembly includes a support plate 15, a cover plate 16, and a filter membrane. The support plate 15 is fixedly mounted on the outside of the sampling side wall 10, and the cover plate 16 is fixedly mounted on the outside of the support plate 15. Multiple rows of holes 17 are provided along the height of each support plate 15 and the cover plate 16, with each row of holes 17 corresponding to each other. The filter membrane is positioned between the support plate 15 and the cover plate 16. After passing through the filter membrane, pore water enters the sample collection tube through the sampling port and the inlet check valve.

[0048] In this embodiment, a sealing ring groove 18 is provided on the outer periphery of each row of holes 17 on both sides of the support plate 15, and a sealing ring is installed in the sealing ring groove 18. The sealing ring on the outside of the support plate 15 separates the rows of holes 17 on the support plate 15 and the cover plate 16, and the sealing ring on the inside of the support plate 15 seals and connects each row of holes on the support plate 15 with the sampling interface 11 at the corresponding height to separate the pore water at different depths.

[0049] In this embodiment, the negative pressure extraction device 4 includes an extraction cylinder 19, a piston 20, a piston rod 21, a spring 22, a spring sleeve 23 and an extraction start paddle 12. One end of the extraction cylinder 19 has a negative pressure extraction interface 13, and the piston 20 is slidingly sealed in the extraction cylinder 19. The piston rod 21 is fixed to the end of the piston 20 facing away from the negative pressure extraction interface 13. The piston rod 21 extends into the spring sleeve 23. The spring 22 is arranged in the spring sleeve 23 and is sleeved on the piston rod 21. The extraction start paddle 12 is fixed on the piston rod 21. The two ends of the spring 22 are respectively against the inner bottom surfaces of the extraction start paddle 12 and the spring sleeve 23. An L-shaped slot 24 is provided on the side wall of the spring sleeve 23. The extraction start paddle 12 extends outward through the L-shaped slot 24. The extraction cylinder 19 and the spring sleeve 23 are both fixedly mounted on the integrated mounting plate 3.

[0050] In this embodiment, the shifting portion 14 is a tooth groove provided on the outer periphery of the mechanical dial 6 , which fits with the extraction start paddle 12 . The extraction start paddle 12 extends into the tooth groove, and 24 paddles can be shifted simultaneously through the mechanical dial 6 .

[0051] In this embodiment, the dial drive device 7 includes a drive motor 25, a driving gear 26, and a driven gear 27. The drive motor 25 is mounted and fixed within the protective tube 5. The driving gear 26 is fixedly mounted on the output shaft of the drive motor 25. The driven gear 27 is fixedly mounted on the mechanical dial 6 and meshes with the driving gear 26. The drive motor 25 drives the driving gear 26 to rotate, and the driven gear 27 drives the mechanical dial 6 to rotate, thereby achieving the purpose of dialing and extracting the start paddle 12.

[0052] In this embodiment, the protective cylinder 5 includes a protective cylinder body 28, a reel seat 29, a support rod 30 and an upper cover 31. The reel seat 29 is fixed to the lower end of the protective cylinder body 28, and the upper cover 31 is fixed to the upper end of the protective cylinder body 28. The reel seat 29 and the upper cover 31 are connected by the support rod 30. This can protect the internal structure and prevent the internal structure from being damaged by collision.

[0053] In this embodiment, a limit baffle 32 is fixedly provided at the lower end of the pin tube 8 to limit and block the pin indicator plate 2 to prevent the pin indicator plate 2 from falling away from the pin tube 8.

[0054] In this embodiment, a top cover 33 is fixedly provided on the upper end of the spring sleeve 23 to prevent foreign matter from entering the spring sleeve 23 .

[0055] In this embodiment, the sample collection tube is a transparent polytetrafluoroethylene tube. One end of the sample collection tube is connected to the negative pressure extraction interface 13 at the bottom of the extraction cylinder 19, and the other end is connected to the sampling interface 11 inside the needle barrel 8. The suspended section in the middle is wound around the reel seat 29 of the protective cylinder 5.

[0056] The present invention provides an extraction-type deep-sea sediment pore water collection device. The spring 22 in the spring sleeve 23 is in a compressed state before entering the sea. The extraction start paddle 12 is stuck in the horizontal section of the L-shaped slot 24 of the spring sleeve 23, so that the spring 22 remains in a compressed state. At this time, the piston rod 21 extends downward, and the piston 20 in the extraction cylinder 19 is pressed against the bottom of the extraction cylinder 19. Deionized water is filled in the sample collection tube to prevent the sample collection tube from being squeezed and deformed under the action of seawater pressure. 24 sample collection tubes are connected to the negative pressure extraction interface 13 and the sampling interface 11. After completing the above preparations, the equipment can be put into the sea for collection. The device sinks to the seabed under the action of gravity and is inserted into the sediment on the seabed. It is left to stand for a period of time until the sediment pore water fully flows into the sampling needle 1. The control drive motor 25 rotates, driving the mechanical dial 6. The mechanical dial 6 pushes the 24 extraction activation paddles 12 apart, moving them to the vertical section of the L-shaped slot. The spring 22 within the spring sleeve 23 extends along the piston rod 21, pushing the extraction activation paddles 12 upward. The upward movement of the extraction activation paddles 12 drives the piston rod 21 upward, lifting the piston 20 and creating a negative pressure cavity within the extraction cylinder 19. Under the influence of the pressure differential, the deionized water in the sample collection tube passes through the outlet check valve and the negative pressure extraction port 13 and enters the extraction cylinder 19. The sediment pore water surrounding the sampling needle 1 is filtered through the filter membrane between the sampling needle's cover plate 16 and the support plate 15 before entering the sample collection tube through the sampling port 11 on the sampling sidewall 10 and the inlet check valve. After all sample collection tubes have completed collection, the device is recovered to the sea surface, the one-way valves (inlet one-way valve and outlet one-way valve) on the sample collection tubes are removed and connected to the pressure-maintaining transfer device to obtain the pore water sample.

[0057] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An extractive deep-sea sediment pore water collection device, characterized by: It includes a sampling pin, a pin indicator plate, an integrated mounting plate, a negative pressure extraction device, a protective tube, a sample collection tube, a mechanical dial and a dial drive device; The sampling needle includes a needle barrel, a penetration cone head, and a filter assembly. The upper end of the needle barrel is fixed to the lower end of the protective barrel. The needle barrel is provided with a plurality of clamping grooves along the height direction. The needle barrel has a sampling side wall. The sampling side wall is provided with a plurality of sampling interfaces at intervals along the height direction. The filter assembly is fixedly arranged on the outer side of the sampling side wall. The penetration cone head is fixed to the lower end of the needle barrel. The pin indicator plate is sleeved on the pin cylinder, and an elastic card block is fixed on the pin indicator plate. When the pin indicator plate moves along the pin cylinder, the elastic card block can be elastically snapped into the snap-in groove of the corresponding height; The integrated mounting plate is fixedly mounted in the protective tube, and a plurality of negative pressure extraction devices are fixedly mounted on the integrated mounting plate along the circumferential direction; The negative pressure extraction device has an extraction start paddle and a negative pressure extraction interface; One end of the sample collection tube is connected to the sampling interface through an inlet one-way valve, and the other end is connected to the negative pressure extraction interface through an outlet one-way valve; The mechanical dial is rotatably connected in the protective tube, the dial driving device is connected to the mechanical dial and is used to drive the mechanical dial to rotate, and the outer periphery of the mechanical dial is provided with a dial portion corresponding to each of the extraction and activation paddles.

2. The extractable deep-sea sediment pore water sampling device according to claim 1, characterized in that: The filter assembly includes a support plate, a cover plate and a filter membrane. The support plate is fixedly arranged on the outside of the sampling side wall, and the cover plate is fixedly arranged on the outside of the support plate. The support plate and the cover plate are provided with multiple rows of holes in the height direction, and the holes in each row correspond to each other one by one. The filter membrane is arranged between the support plate and the cover plate.

3. The extractable deep-sea sediment pore water sampling device according to claim 2, characterized in that: A sealing ring groove is provided on the outer periphery of each row of holes on both side surfaces of the supporting plate, and a sealing ring is installed in the sealing ring groove.

4. The extractable deep-sea sediment pore water sampling device according to claim 1, characterized in that: The negative pressure extraction device includes an extraction cylinder, a piston, a piston rod, a spring, a spring sleeve and an extraction start paddle. One end of the extraction cylinder has a negative pressure extraction interface. The piston sliding seal is arranged in the extraction cylinder. The piston rod is fixed to the end of the piston facing away from the negative pressure extraction interface. The piston rod extends into the spring sleeve. The spring is arranged in the spring sleeve and sleeved on the piston rod. The extraction start paddle is fixed on the piston rod. The two ends of the spring are respectively against the extraction start paddle and the inner bottom surface of the spring sleeve. An L-shaped slot is provided on the side wall of the spring sleeve. The extraction start paddle extends outward through the L-shaped slot. The extraction cylinder and the spring sleeve are both fixedly mounted on the integrated mounting plate.

5. The extractable deep-sea sediment pore water sampling device according to claim 1, characterized in that: The dialing portion is a tooth groove arranged on the outer periphery of the mechanical dial, and the extraction and activation paddle extends into the tooth groove.

6. The extractable deep-sea sediment pore water sampling device according to claim 1, characterized in that: The dial driving device includes a driving motor, a driving gear and a driven gear. The driving motor is fixed in the protective tube, the driving gear is fixed on the output shaft of the driving motor, and the driven gear is fixed on the mechanical dial and meshes with the driving gear.

7. The extractable deep-sea sediment pore water sampling device according to claim 1, characterized in that: The protective cylinder includes a protective cylinder body, a reel seat, a support rod and an upper cover. The reel seat is fixed to the lower end of the protective cylinder body, the upper cover is fixed to the upper end of the protective cylinder body, and the reel seat and the upper cover are connected through the support rod.

8. The extractable deep-sea sediment pore water sampling device according to claim 1, characterized in that: A limit baffle is fixedly provided at the lower end of the pin cylinder for limiting and blocking the pin indicator plate.

9. The extractable deep-sea sediment pore water sampling device according to claim 4, characterized in that: A top cover is fixedly provided on the upper end of the spring sleeve.

10. The extractable deep-sea sediment pore water sampling device according to claim 1, characterized in that: The sample collection tube is a transparent polytetrafluoroethylene tube.

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