Sampling device for marine geological survey

Abstract

The invention discloses a sampling device for marine geological survey, belongs to the field of marine geological survey, and aims to solve the problems that sample characteristics originally representing specific positions and depth information are damaged due to mixing of samples, analysis results cannot accurately reflect real conditions of sampling points, data are inaccurate, and the sampling efficiency is high. The sampling device for the marine geological survey comprises a cylinder placing box, a negative pressure machine arranged on the outer side of the cylinder placing box, a first hose communicated with the input end of the negative pressure machine, and a negative pressure head communicated with the other end of the first hose, by arranging the elastic mechanism, when the pushing mechanism moves downwards, the elastic mechanism is driven to move upwards, sampling of each time is separated, and compared with the prior art, mixing of samples is reduced, so that the accuracy of the samples is improved.

Description

Technical Field

[0001] The invention relates to the field of marine geological survey, and in particular to a sampling device used for marine geological survey. Background Art

[0002] The sampling devices of marine geological surveys are mainly used to collect geological samples from the bottom of the ocean, including sediments, rocks, etc., so that scientists can study the marine geological structure, geological history, marine environmental changes, etc.

[0003] Announcement No. CN118275164B discloses a marine geological sediment sampling device, which belongs to the field of marine geological sampling technology. In order to solve the problem of low efficiency of existing sampling devices in penetrating into sediments; the present invention uses a conical cylinder, a counterweight, an upper top plate and a lifting assembly. During operation, when the contact box falls on the sediment, since the counterweight is installed on the contact box, the gravity of the counterweight makes the lower end of the contact box insert into the sediment. Marine geological surveys are an important means to explore the mysteries of the ocean and understand the evolution of the earth. They play an irreplaceable role in human development and utilization of marine resources, ensuring marine safety and studying global climate change. Among many survey tasks, sampling and analysis of seabed silt is one of the key links in obtaining marine geological information.

[0004] As an important sediment at the bottom of the ocean, seabed mud contains rich geological history information. The changes in its composition, structure and properties can reflect the evolution of the marine environment and the characteristics of geological tectonic activities. Through detailed analysis of seabed mud samples, scientists can infer the changes in the marine ecosystem and the trend of paleoclimate changes, and can also provide necessary basic data for seabed mineral resource exploration and marine engineering construction.

[0005] In actual operation, the device used for sampling seabed silt often adopts the method of placing all the collected silt samples in a storage box. However, due to its special physical properties, seabed silt has significant fluidity. When silt samples from different locations and depths are collected together in a storage box, during the transportation and subsequent processing of the device, due to the bumps and vibrations of the ship and the gravity of the samples themselves, these originally independently collected silt samples are very easy to mix with each other. Once the samples are mixed, the sample characteristics that originally represent specific location and depth information will be destroyed, making it impossible for the analysis results to accurately reflect the actual situation of each sampling point, resulting in inaccurate data, which seriously affects the reliability and scientific nature of the marine geological survey results. This data error may mislead the assessment of the marine geological environment and bring potential risks to related decisions such as marine resource development, environmental protection and engineering construction.

[0006] To solve the above problems, a sampling device for marine geological survey is proposed. Summary of the Invention

[0007] The object of the present invention is to provide a sampling device for marine geological surveys, which solves the problem of inaccurate data.

[0008] To achieve the above object, the present invention provides the following technical solution: A sampling device for marine geological surveys, comprising a cylindrical placement box, a negative pressure machine arranged outside the cylindrical placement box, a first hose connected to the input end of the negative pressure machine, a negative pressure head connected to the other end of the first hose, a second hose connected to the output end of the negative pressure machine, a pushing mechanism arranged above the cylindrical placement box, and an elastic mechanism arranged inside the cylindrical placement box;

[0009] The pushing mechanism includes a rotating component and a reciprocating component, and the reciprocating component is arranged inside the rotating component;

[0010] The rotating component includes a first support cylinder fixedly connected to the upper inner side of the cylindrical placement box, a rotating cylinder rotatably connected above the first support cylinder, a rotating plate rotatably connected to the upper surface of the rotating cylinder, a pulling plate fixedly connected above the rotating plate, an electric push rod fixedly connected to the middle of the lower surface of the rotating plate, a rotating motor fixedly connected to the output end of the electric push rod, a rotating shaft fixedly connected to the output end of the rotating motor, a first connecting plate vertically slidably connected to the outside of the rotating shaft, a second connecting plate fixedly connected to the other end of the first connecting plate, one end of the second connecting plate is fixedly connected to the negative pressure head, a controller is fixedly connected to the outer side of the lower surface of the rotating plate, the first connecting plate is fixedly connected to the negative pressure machine, a discharge port communicating with the outer side of the cylindrical placement box is opened on the inner side surface of the cylindrical placement box away from the central axis of the rotating shaft, and a plug is threadedly connected to the inner side of the discharge port.

[0011] Preferably, the central axis of the second connecting plate is parallel to the central axis of the cylindrical placement box.

[0012] Preferably, the central axes of the first support cylinder, the rotating cylinder, the rotating plate, and the cylindrical placement box are on the same vertical central axis.

[0013] Preferably, the reciprocating assembly includes a rotating disk fixedly connected to the outside of the output end of the electric push rod. A rotating ring is fixedly connected to the outside of the lower end of the rotating disk. A first guiding groove is arranged inside the rotating ring. One end of the first guiding groove communicates with a second guiding groove. A first guiding rod is arranged inside the second guiding groove. One end of the first guiding rod is fixedly connected to a first connecting rod fixedly connected to the first connecting plate. A chute is arranged inside one side below the second connecting plate. A slider is arranged inside the chute. One end of the slider is fixedly connected to a scraping plate. A first hole is arranged inside the rotating cylinder. A first baffle is arranged below the inside of the rotating cylinder. The connection mode between the first baffle and the first connecting plate is fixed connection. The width of the first baffle is greater than the width of the first hole.

[0014] Preferably, a plurality of first guiding grooves are provided, and the first guiding grooves are circumferentially and equidistantly distributed inside the rotating ring, and the external structure of the first guiding groove is a horizontal circular arc.

[0015] Preferably, the number of the second guiding grooves is the same as that of the first guiding grooves, and the external structure of the second guiding groove is "V"-shaped, and the number of the second guiding grooves is arranged at intervals with the first guiding grooves.

[0016] Preferably, the width of one end of the slider close to the central axis of the second connecting plate is greater than the width of the end of the slider far from the central axis of the second connecting plate, and the length of the slider in the up-and-down direction is less than the length of the chute in the up-and-down direction.

[0017] Preferably, the elastic mechanism includes a first partition fixedly connected inside the cylindrical placement box. The number of the first partitions is the same as that of the second guiding grooves. A second hole is communicated with the inner side wall of the cylindrical placement box. A plurality of the second holes are equidistantly distributed up and down as a group, and a plurality of groups of the second holes are arranged along the circumferential direction of the cylindrical placement box. A groove is communicated with the upper wall on one side of the second hole close to the cylindrical placement box. A second partition is slidably connected inside the second hole. A second baffle is fixedly connected to the upper part on one side of the second partition close to the cylindrical placement box. A spring is fixedly connected between the second baffle and the cylindrical placement box. A pushing plate is arranged on the inner wall of the cylindrical placement box. A third hole is arranged inside the upper part of the pushing plate. The rotating shaft is nested inside the third hole. The lower end of the rotating shaft is rotatably connected to a first rack. A gear is meshed and connected to the inner side of the first rack. A second rack fixedly connected to the pushing plate is meshed and connected to the outside of the gear. A third baffle communicated with the second hose is rotatably connected to the outside above the cylindrical placement box. A telescopic rod fixedly connected to the first connecting plate is fixedly connected to the upper surface of the third baffle. A rotating shaft fixedly connected to the gear is rotatably connected to the cylindrical placement box. A fourth hole for nesting the rotating shaft is arranged inside the pushing plate.

[0018] Preferably, the upper surface of the second partition is a horizontal plane, and the lower surface of the second partition is an inclined plane.

[0019] Preferably, the upper end of the pushing plate has a conical appearance structure, the lower end of the pushing plate has a cylindrical appearance structure, and the outer side of the pushing plate fits against the inner side of the cylindrical storage box.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The sampling device for marine geological survey provided by the present invention is provided with an elastic mechanism, so that when the pushing mechanism moves downward, it drives the elastic mechanism to move upward, separating each sampling. Compared with the prior art, the mixing of samples is reduced, thereby improving the accuracy of the samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic perspective view of the overall structure of the present invention;

[0022] Figure 2 is a schematic front sectional view of the rotating cylinder of the present invention;

[0023] Figure 3 of the present invention Figure 2 is a schematic view of the structure at A in

[0024] Figure 4 of the present invention Figure 2 is a schematic view of the structure at B in

[0025] Figure 5 of the present invention Figure 2 is a schematic view of the structure at C in

[0026] Figure 6 is a schematic top sectional view of the second partition of the present invention;

[0027] Figure 7 is a schematic left view of the negative pressure head of the present invention;

[0028] Figure 8 is a schematic top view of the rotating ring of the present invention.

[0029] In the figure: 1. Cylindrical placement box; 2. Negative pressure machine; 3. First hose; 4. Negative pressure head; 7. Second hose; 5. Pushing mechanism; 6. Elastic mechanism; 51. Rotating assembly; 52. Reciprocating assembly; 511. First support cylinder; 512. Rotating cylinder; 513. Rotating plate; 514. Pulling plate; 515. Electric push rod; 516. Rotating motor; 517. Rotating shaft; 518. First connecting plate; 5110. Second connecting plate; 519. Controller; 5111. Discharge port; 5112. Plug; 521. Rotating disk; 522. Rotating ring; 523. First guiding groove; 524. Second guiding groove; 525. First guiding rod; 526. First connecting rod; 527. Chute; 528. Slide block; 529. Scraper; 5210. First hole; 5211. First baffle; 601. First partition; 602. Second hole; 603. Groove; 604. Second partition; 605. Second baffle; 606. Spring; 607. Pushing plate; 608. Third hole; 609. First rack; 610. Gear; 611. Second rack; 612. Third baffle; 613. Expansion link; 614. Rotating shaft; 615. Fourth hole. Detailed implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 - 8 , the present invention provides a technical solution: A sampling device for marine geological survey, including a cylindrical placement box 1, a negative pressure machine 2 arranged outside the cylindrical placement box 1, a first hose 3 connected to the input end of the negative pressure machine 2, a negative pressure head 4 connected to the other end of the first hose 3, a second hose 7 connected to the output end of the negative pressure machine 2, a pushing mechanism 5 arranged above the cylindrical placement box 1, and an elastic mechanism 6 arranged inside the cylindrical placement box 1;

[0032] The pushing mechanism 5 includes a rotating assembly 51 and a reciprocating assembly 52, and the reciprocating assembly 52 is arranged inside the rotating assembly 51;

[0033] The rotating assembly 51 includes a first support cylinder 511 fixedly connected to the upper inner side of the cylinder placement box 1. A rotating cylinder 512 is rotatably connected above the first support cylinder 511. A rotating plate 513 is rotatably connected to the upper surface of the rotating cylinder 512. A pulling plate 514 is fixedly connected above the rotating plate 513. A power cylinder 515 is fixedly connected to the middle of the lower surface of the rotating plate 513. The output end of the power cylinder 515 is fixedly connected to a rotating motor 516. The output end of the rotating motor 516 is fixedly connected to a rotating shaft 517. A first connecting plate 518 is vertically slidably connected to the outer side of the rotating shaft 517. The other end of the first connecting plate 518 is fixedly connected to a second connecting plate 5110. The central axis of the second connecting plate 5110 is parallel to the central axis of the cylinder placement box 1. One end of the second connecting plate 5110 is fixedly connected to the negative pressure head 4. A controller 519 is fixedly connected to the outer side of the lower surface of the rotating plate 513. The first connecting plate 518 is fixedly connected to the negative pressure machine 2. The central axes of the first support cylinder 511, the rotating cylinder 512, the rotating plate 513, and the cylinder placement box 1 are on the same vertical central axis. An outlet 5111 communicating with the outer side of the cylinder placement box 1 is provided on the inner side of the cylinder placement box 1 far from the central axis of the rotating shaft 517. A plug 5112 is threadedly connected to the inner side of the outlet 5111.

[0034] The reciprocating component 52 includes a rotating disk 521 fixedly connected to the outer side of the output end of the electric push rod 515. A rotating ring 522 is fixedly connected to the outer side of the lower end of the rotating disk 521. A first guiding groove 523 is provided inside the rotating ring 522. There are multiple first guiding grooves 523, and the first guiding grooves 523 are circumferentially and equidistantly distributed on the inner side of the rotating ring 522. Moreover, the external structure of the first guiding groove 523 is a horizontal circular arc, so that the first guiding rod 525 will not move up and down when rotating inside the first guiding groove 523. One end of the first guiding groove 523 communicates with a second guiding groove 524. The number of the second guiding grooves 524 is the same as that of the first guiding grooves 523, and the external structure of the second guiding groove 524 is "V"-shaped, so that the first guiding rod 525 can move up and down when moving inside the first guiding groove 523. A first guiding rod 525 is provided inside the second guiding groove 524. One end of the first guiding rod 525 is fixedly connected to a first connecting rod 526 fixedly connected to the first connecting plate 518. A chute 527 is provided inside the lower side of one side of the second connecting plate 5110. A slider 528 is provided inside the chute 527. One end of the slider 528 is fixedly connected to a scraping plate 529. A first hole 5210 is provided inside the rotating cylinder 512. A first baffle 5211 is provided below the inner side of the rotating cylinder 512. The connection mode between the first baffle 5211 and the first connecting plate 518 is fixed connection. The width of the first baffle 5211 is greater than the width of the first hole 5210. The width of the end of the slider 528 close to the central axis of the second connecting plate 5110 is greater than the width of the end of the slider 528 far from the central axis of the second connecting plate 5110. Moreover, the vertical length of the slider 528 is less than the vertical length of the chute 527, so that the slider 528 will not move out of the inside of the chute 527 when moving inside the chute 527.

[0035] The elastic mechanism 6 includes a first partition plate 601 fixedly connected inside the cylinder placement box 1. The first partition plates 601 arranged in an annular array divide the inside of the cylinder placement box 1 into multiple partition spaces. The number of the first partition plates 601 is the same as the number of the second guide grooves 524. A second hole 602 is communicated with the inner side wall of the cylinder placement box 1. A plurality of the second holes 602 are equally spaced up and down as a group, and a plurality of groups of the second holes 602 are arranged along the circumferential direction of the cylinder placement box 1. A group of the second holes 602 is correspondingly communicated with the partition space on the same side. The upper wall of the second hole 602 close to the cylinder placement box 1 is communicated with a groove 603. A second partition plate 604 is slidably connected inside the second hole 602. The second partition plates 604 on the same side extend into the partition space on the same side and divide the partition space into multiple storage spaces. Each storage space is correspondingly communicated with the discharge port 5111. A second baffle 605 is fixedly connected above the second partition plate 604 close to the cylinder placement box 1. A spring 606 is fixedly connected between the second baffle 605 and the cylinder placement box 1. A push plate 607 is arranged on the inner wall of the cylinder placement box 1. A third hole 608 is arranged inside the upper part of the push plate 607. The rotating shaft 517 is nested inside the third hole 608. The lower end of the rotating shaft 517 is rotatably connected with a first rack 609. A gear 610 is meshed and connected to the inner side of the first rack 609. A second rack 611 fixedly connected to the push plate 607 is meshed and connected to the outer side of the gear 610. A third baffle 612 communicated with the second hose 7 is rotatably connected to the outer side above the cylinder placement box 1. A telescopic rod 613 fixedly connected to the first connecting plate 518 is fixedly connected to the upper surface of the third baffle 612. A rotating shaft 614 rotatably connected to the cylinder placement box 1 is fixedly connected inside the gear 610. A fourth hole 615 for nesting the rotating shaft 614 is arranged inside the push plate 607. The upper surface of the second partition plate 604 is a horizontal plane, and the lower surface of the second partition plate 604 is an inclined surface, so that the second partition plate 604 can seal the upper surface of the second hole 602. The upper end external structure of the push plate 607 is conical, and the lower end external structure of the push plate 607 is cylindrical, and the outer side surface of the push plate 607 fits with the inner side surface of the cylinder placement box 1, so that the push plate 607 can push the second partition plate 604 to move outward.

[0036] When sampling is required, use a rope or a connecting plate to fix the pulling plate 514, and place the entire device into the sea so that the support below the cylinder placement box 1 is inserted into the seabed. Start the rotating motor 516 to drive the first connecting plate 518 and the rotating cylinder 512 to rotate, driving the negative pressure machine 2 to drive the second connecting plate 5110, the first hose 3, the negative pressure machine 2, the negative pressure head 4, the telescopic rod 613 and the third baffle 612 to rotate. Under the action of gravity, a part of the second connecting plate 5110 has been inserted into the silt, and a part of the silt is rotated and pushed. When the first connecting plate 518 rotates, it drives the first connecting rod 526 and the first guide rod 525 to rotate. Since there are multiple first guide grooves 523, and the first guide grooves 523 are equally spaced in an arc shape on the inner side of the rotating ring 522, and the external structure of the first guide groove 523 is a horizontal arc, the number of the second guide grooves 524 is the same as that of the first guide grooves 523, and the external structure of the second guide groove 524 is a "V" shape, and the number of the second guide grooves 524 is arranged at intervals with the first guide grooves 523. When the first guide rod 525 rotates in the first guide groove 523, the first guide rod 525 pulls the first connecting rod 526 and the first connecting plate 518 to move upward, so that the second connecting plate 5110 and the negative pressure head 4 rotate upward and do not contact the surface of the silt. The slider 528 drives the scraper 529 to rotate to rotate and accumulate the silt. When the first guide rod 525 moves to the inside of the second guide groove 524, the first guide rod 525 drives the first connecting rod 526, the first connecting plate 518, the second connecting plate 5110 and the negative pressure head 4 to move downward to cover the accumulated silt. At this time, the program in the controller 519 controls the negative pressure machine 2 to start, and the accumulated silt enters from the negative pressure head 4 into the first hose 3, then into the second hose 7 and into the space between the first partitions 601 inside the cylinder placement box 1 to complete the sampling. Repeat such actions. After the scraper 529 rotates one circle and the sampling is completed, start the electric push rod 515 to drive the rotating motor 516, the rotating ring 522, the scraper 529, the first guide rod 525 and the negative pressure head 4, etc. to move downward for the next circle of sampling.

[0037] Since there are multiple first guide grooves 523, multiple second guide grooves 524 are correspondingly provided. When the first guide rod 525 moves to the inside of the second guide groove 524, the negative pressure head 4 moves downward to cover the accumulated silt for sampling, and multiple samplings can be carried out at different places, improving the sampling efficiency.

[0038] Since the scraper 529 is always inserted into the silt to push the silt, the silt in the circumferential direction can be pushed up, and then the negative pressure head 4 is used to adsorb it into the cylinder placement box 1 for storage, making the sampling more comprehensive.

[0039] After the sampling is completed when the scraper 529 rotates one circle, the electric push rod 515 is started to drive the rotating motor 516, the rotating ring 522, the scraper 529, the first guide rod 525, the negative pressure head 4, etc. to move downward for the sampling of the next circle. The depth of the sludge scraped off by the scraper 529 at one time is not very deep. Since the sampling is carried out on the seabed at this time, when the sludge is taken out, a vacuum-like environment will appear. Under the action of pressure, the surrounding seawater will move towards the middle, driving the surface sludge around to move towards the middle, resulting in low accuracy of subsequent sampling. When the scraper 529 and the negative pressure head 4 are sampling, after rotating one circle and then rotating the next circle, the depth generated in the middle is not very deep, unlike directly inserting the sampling cylinder into the sludge to fix the required depth and then pulling it out, which generates a large impact. To sum up, after the sampling is completed when the scraper 529 rotates one circle, the electric push rod 515 is started to drive the rotating motor 516, the rotating ring 522, the scraper 529, the first guide rod 525, the negative pressure head 4, etc. to move downward for the sampling of the next circle, which can reduce the disturbance of seawater to the sludge that has not been sampled, and improve the accuracy of subsequent sampling.

[0040] After the sampling is completed when the scraper 529 rotates one circle, the electric push rod 515 is started to drive the rotating motor 516, the rotating ring 522, the scraper 529, the first guide rod 525, the negative pressure head 4, etc. to move downward for the sampling of the next circle. The scraper 529 and the negative pressure head 4 do not need to move downward much distance, and the extrusion of the sludge is not very deep, so that the integrity of the samples inside the sludge, such as microbial communities, is less damaged, and the integrity rate of sampling is improved.

[0041] After the sampling is completed when the scraper 529 rotates one circle, the electric push rod 515 is started to drive the rotating motor 516 to move downward, driving the rotating shaft 517 and the first rack 609 rotatably connected to the rotating shaft 517 to move downward, so that the gear 610 rotates, driving the second rack 611 to move upward. Since the second rack 611 and the push plate 607 move upward, and the upper end appearance structure of the push plate 607 is conical, and the lower end appearance structure of the push plate 607 is cylindrical, and the outer side surface of the push plate 607 is attached to the inner side surface of the cylindrical placement box 1, the upper surface of the second partition plate 604 is horizontal, and the lower surface of the second partition plate 604 is inclined, when the push plate 607 moves upward, it pushes the second partition plate 604 along the inclined surface of the second partition plate 604 to move outward along the direction of the second hole 602, blocking the upper part of the just-adsorbed sludge sample. The horizontal upper surface of the second partition plate 604 can be used as the carrier for the next sludge sample, reducing the mixing of samples and improving the accuracy of samples.

[0042] When the electric push rod 515 moves downward for the next sampling, it can isolate and separate the previous sample, avoiding the impact of the next sample from mixing into the previous sample, and further improving the accuracy of the sample.

[0043] After the sampling is completed, the entire device is pulled out from the seabed and placed on a stable platform. When the sample is released, the corresponding plug 5112 is rotated so that the sample flows out from the discharge port 5111 to complete the final sampling.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sampling device for marine geological survey, comprising a cylindrical placement box (1), a negative pressure machine (2) arranged outside the cylindrical placement box (1), a first hose (3) connected to the input end of the negative pressure machine (2), a negative pressure head (4) connected to the other end of the first hose (3), and a second hose (7) connected to the output end of the negative pressure machine (2), characterized in that: Above the cylinder placement box (1), a pushing mechanism (5) is provided, and an elastic mechanism (6) is arranged inside the cylinder placement box (1); The pushing mechanism (5) includes a rotating component (51) and a reciprocating component (52), and the reciprocating component (52) is arranged inside the rotating component (51); The rotating component (51) includes a first support cylinder (511) fixedly connected to the upper inner side of the cylinder placement box (1). Above the first support cylinder (511), a rotating cylinder (512) is rotatably connected. On the upper surface of the rotating cylinder (512), a rotating plate (513) is rotatably connected. Above the rotating plate (513), a pulling plate (514) is fixedly connected. In the middle of the lower surface of the rotating plate (513), an electric push rod (515) is fixedly connected. The output end of the electric push rod (515) is fixedly connected to a rotating motor (516). The output end of the rotating motor (516) is fixedly connected to a rotating shaft (517). A first connecting plate (518) is vertically slidably connected to the outer side of the rotating shaft (517). The other end of the first connecting plate (518) is fixedly connected to a second connecting plate (5110). One end of the second connecting plate (5110) is fixedly connected to the negative pressure head (4). On the outer side of the lower surface of the rotating plate (513), a controller (519) is fixedly connected. The first connecting plate (518) is fixedly connected to the negative pressure machine (2). On the inner side surface of the cylinder placement box (1) away from the central axis of the rotating shaft (517), a discharge port (5111) communicating with the outer side surface of the cylinder placement box (1) is opened. A plug (5112) is threadedly connected to the inner side of the discharge port (5111).

2. The sampling device for marine geological survey according to claim 1, characterized in that: The central axis of the second connecting plate (5110) is parallel to the central axis of the cylinder placement box (1).

3. A sampling device for marine geological survey according to claim 1, characterized in that: The central axis of the first support cylinder (511), the central axis of the rotating cylinder (512), the central axis of the rotating plate (513), and the central axis of the cylinder placement box (1) are on the same vertical central axis.

4. The sampling device for marine geological survey according to claim 1, characterized in that: The reciprocating assembly (52) includes a rotating disc (521) fixedly connected to the outer side of the output end of the electric push rod (515). A rotating ring (522) is fixedly connected to the outer side of the lower end of the rotating disc (521). A first guiding groove (523) is provided inside the rotating ring (522). One end of the first guiding groove (523) communicates with a second guiding groove (524). A first guiding rod (525) is provided inside the second guiding groove (524). One end of the first guiding rod (525) is fixedly connected to a first connecting rod (526) fixedly connected to the first connecting plate (518). A sliding groove (527) is provided inside the lower side of one side of the second connecting plate (5110). A sliding block (528) is provided inside the sliding groove (527). One end of the sliding block (528) is fixedly connected to a scraping plate (529). A first hole (5210) is provided inside the rotating cylinder (512). A first baffle (5211) is provided below the inner side of the rotating cylinder (512). The first baffle (5211) is fixedly connected to the first connecting plate (518). The width of the first baffle (5211) is greater than the width of the first hole (5210).

5. The sampling device for marine geological survey according to claim 4, characterized in that: A plurality of the first guiding grooves (523) are provided, and the first guiding grooves (523) are circumferentially and equidistantly distributed inside the rotating ring (522), and the outer appearance structure of the first guiding groove (523) is a horizontal circular arc shape.

6. The sampling device for marine geological survey according to claim 4, characterized in that: The number of the second guiding grooves (524) is the same as the number of the first guiding grooves (523), and the outer appearance structure of the second guiding groove (524) is a "V" shape, and the second guiding grooves (524) are arranged at intervals with the first guiding grooves (523).

7. The sampling device for marine geological survey according to claim 4, characterized in that: The width of one end of the sliding block (528) close to the central axis of the second connecting plate (5110) is greater than the width of the other end of the sliding block (528) away from the central axis of the second connecting plate (5110), and the length of the sliding block (528) in the up and down direction is less than the length of the sliding groove (527) in the up and down direction.

8. The sampling device for marine geological survey according to claim 1, characterized in that: The elastic mechanism (6) includes a first partition plate (601) fixedly connected inside the cylinder placement box (1). The number of the first partition plates (601) is the same as the number of the second guide grooves (524). A second hole (602) is communicated with the inner side wall of the cylinder placement box (1). A plurality of the second holes (602) are evenly distributed up and down in a group, and a plurality of groups of the second holes (602) are arranged along the circumferential direction of the cylinder placement box (1). A groove (603) is communicated with the upper wall of the second hole (602) close to one side of the cylinder placement box (1). A second partition plate (604) is slidably connected inside the second hole (602). A second baffle plate (605) is fixedly connected to the upper part of the second partition plate (604) close to one side of the cylinder placement box (1). A spring (606) is fixedly connected between the second baffle plate (605) and the cylinder placement box (1). A push plate (607) is arranged on the inner wall of the cylinder placement box (1). A third hole (608) is arranged inside the upper part of the push plate (607). The rotating shaft (517) is nested inside the third hole (608). The lower end of the rotating shaft (517) is rotatably connected to a first rack (609). A gear (610) is meshed and connected to the inner side of the first rack (609). A second rack (611) fixedly connected to the push plate (607) is meshed and connected to the outer side of the gear (610). A third baffle plate (612) communicated with the second hose (7) is rotatably connected to the outer side above the cylinder placement box (1). A telescopic rod (613) fixedly connected to the first connecting plate (518) is fixedly connected to the upper surface of the third baffle plate (612). A rotating shaft (614) rotatably connected to the cylinder placement box (1) is fixedly connected inside the gear (610). A fourth hole (615) for nesting the rotating shaft (614) is arranged inside the push plate (607).

9. The sampling device for marine geological survey according to claim 8, wherein: The upper surface of the second partition plate (604) is a horizontal plane, and the lower surface of the second partition plate (604) is an inclined plane.

10. The sampling device for marine geological survey according to claim 8, characterized in that: The upper end external structure of the push plate (607) is conical, the lower end external structure of the push plate (607) is cylindrical, and the outer side surface of the push plate (607) is attached to the inner side surface of the cylinder placement box (1).

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