Sampling device for seabed soil

Abstract

The utility model provides a seabed soil sampling device, which comprises: a collection part, which is of a hollow structure, two ends of the collection part are provided with a first port and a second port, the first port is used for discharging a medium in the collection part, and the second port is used for allowing a soil sample to enter the collection part; the counterweight mechanism is configured on the acquisition part and is used for adjusting the weight of the acquisition part; the opening and closing mechanism is installed on the collecting component and used for being connected with the lifting cable; when the lifting acting force of the lifting cable acts on the opening and closing mechanism, the opening and closing mechanism can close the first port; the seabed soil sampling device solves the technical problem that an existing seabed soil sampling device is large in probability and cannot obtain and complete soil samples, a relatively closed space is formed in the collecting component through the soil samples and the opening and closing mechanism, internal media cannot flow out easily, external seawater cannot flow in easily, and therefore a stable environment is provided, and the sampling efficiency is improved. The integrity of the soil sample in the recovery process is ensured.

Description

Technical Field

[0001] This application relates to the technical field of seabed sampling equipment, and more particularly to a seabed soil sampling device. Background Technology

[0002] The extraction of seabed sediment samples is of paramount importance for marine geology, environmental science research, and marine resource development. Studying seabed sediments allows us to understand the composition and structure of seabed strata, sediment types, and their evolution, providing valuable data support for understanding Earth's history, climate change, and predicting natural disasters. Furthermore, seabed sediments may contain abundant mineral or biological resources, and their compositional analysis helps assess their potential economic value and formulate rational mining plans. Therefore, accurate and effective extraction of seabed sediment samples is fundamental to these research and development activities.

[0003] Existing seabed sediment sampling devices typically consist of a sampling tube and a counterweight. This design aims to ensure that samples can be collected deep into the seabed sediment layer. Specifically, the sampling tube is lowered to the seabed by the weight provided by the counterweight attached to it, and continues to penetrate the seabed surface under its own weight until a predetermined depth is reached. During descent, seabed sediment naturally enters one opening of the sampling tube due to external pressure. Simultaneously, an opening at the other end of the sampling tube allows internal media (such as seawater or air) to be expelled, thus making room for newly entering sediment. After sampling is completed, the entire sampling tube, along with the collected sediment sample, is retrieved to the surface using a lifting device. This method is widely used due to its simple and direct operation and relatively high efficiency.

[0004] However, existing seabed sediment sampling devices have significant drawbacks. The main problem is that, because the sampling tube has openings at both ends, seawater may flow in from one end and push sediment out from the other during the tube's ascent, resulting in incomplete or even completely lost samples. This is particularly pronounced with looser sediments, as these materials are more easily washed away by water currents. Such results not only waste valuable sampling opportunities but also affect the accuracy of subsequent analyses. Therefore, improving the design of existing sampling tubes to prevent sample loss during retrieval has become a key challenge in improving the quality of seabed sediment sampling. Utility Model Content

[0005] This application provides a seabed soil sampling device, which solves the technical problem that existing seabed soil sampling devices have a high probability of failing to obtain complete soil samples. The technical solution is as follows:

[0006] This application provides a seabed soil sampling device, comprising: a collection component having a hollow structure, and having a first port and a second port at both ends of the collection component, the first port being used to discharge the medium inside the collection component, and the second port being used to allow soil samples to enter the interior of the collection component; a counterweight mechanism disposed on the collection component for adjusting the weight of the collection component; and an opening and closing mechanism installed on the collection component for connecting an upper lifting cable.

[0007] When the lifting force of the lifting cable acts on the opening and closing mechanism, the opening and closing mechanism can close the first port.

[0008] In one embodiment, the opening and closing mechanism includes: a transfer component sleeved on one end of the acquisition component, and the transfer component is connected to a first port; a linkage component hinged to the transfer component for controlling the opening and closing of the transfer component; and a connecting component connected to the linkage component, the connecting component having a mounting hole for connecting an upward lifting cable.

[0009] In one embodiment, the linkage assembly includes: two movable arms, the middle of which is hinged to a connecting component, and the two movable arms are arranged opposite each other on the end port of the connecting component away from the acquisition component, so as to form a closed end and a connecting end on the movable arms. When the two movable arms are rotated to align the closed ends, the two movable arms can cover the end port of the connecting component away from the acquisition component; and two connecting arms, one end of which is connected to a connecting component, and the other end of which is hinged to the connecting end of the corresponding movable arm.

[0010] In one embodiment, the port of the adapter component near the acquisition component gradually increases in size towards the other port to form a flared structure; the movable arm on the linkage component is hinged to the end of the adapter component away from the acquisition component.

[0011] In one embodiment, the counterweight mechanism includes: a counterweight bracket mounted on the acquisition component; a counterweight assembly disposed on the counterweight bracket to adjust the balance and weight of the acquisition component; and a third counterweight sleeved on the acquisition component and located on the side of the counterweight bracket opposite to the separation mechanism, the third counterweight being used to guide the acquisition component to face the second port toward the seabed mud layer.

[0012] In one embodiment, the counterweight support includes: a sleeve fitted onto the data acquisition component; and a mounting boss connected to one end of the sleeve near the opening and closing mechanism, with the mounting boss extending radially along the data acquisition component.

[0013] The counterweight assembly includes: a first counterweight, symmetrically arranged on the mounting boss, used to create a balancing gravity on the acquisition component; and a second counterweight, mounted on the sleeve, used to adjust the downward gravity of the acquisition component.

[0014] In one embodiment, it further includes: two mounting columns symmetrically arranged on the mounting boss, and a first counterweight detachably sleeved on the corresponding mounting column.

[0015] In one embodiment, the sleeve includes a mounting portion and a limiting portion. The mounting boss is detachably disposed at one end of the mounting portion, and the limiting portion is located at the end of the mounting portion opposite to the mounting boss. The diameter of the limiting portion is larger than the diameter of the mounting portion. The mounting portion is used to accommodate a second counterweight, and the limiting portion is used to restrict the second counterweight from detaching from the mounting portion.

[0016] In one embodiment, the third counterweight is configured as a conical structure, and the conical head of the third counterweight is opposite to the opening and closing mechanism.

[0017] Compared to existing technologies, the seabed soil sampling device proposed in the above technical solution controls the opening and closing state of one end of the sampling component, namely the first port, through an opening and closing mechanism, significantly reducing the probability of not obtaining a complete soil sample. The opening and closing mechanism automatically closes the first port using the force of the lifting cable. After the seabed soil sampling device sinks to the predetermined depth and completes soil sample collection, the lifting force applied to the opening and closing mechanism by the lifting cable quickly closes the first port. This prevents seawater from entering through the first port and pushing the soil sample out through the second port during the retrieval of the sampling device, effectively preventing soil sample loss. The technical principle is that the pressure difference between the internal medium of the sampling component and the external environment allows the soil sample entering the sampling component through the second port to be stably adsorbed onto the inner wall of the sampling component during retrieval, reducing soil sample loss due to physical disturbance. Specifically, after the opening and closing mechanism closes the first port, a relatively closed space is formed inside the collection component, where the internal medium cannot easily flow out, and external seawater cannot easily flow in. This provides a stable environment for the soil sample and ensures the integrity of the soil sample throughout the entire recovery process.

[0018] In summary, this application improves upon existing seabed soil sampling devices through ingenious design. This innovative solution provides a more effective tool for marine geological research, environmental science analysis, and marine resource development, and has significant application value and broad market prospects.

[0019] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0020] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0021] Figure 1 This is a three-dimensional structural diagram of the seabed soil sampling device in the embodiments of this application;

[0022] Figure 2 This is an enlarged view of the opening and closing mechanism in the embodiments of this application;

[0023] Figure 3 This is an enlarged view of the counterweight support structure in the embodiments of this application.

[0024] Figure label:

[0025] 1. Data acquisition components;

[0026] 101. First port; 102. Second port;

[0027] 2. Opening and closing mechanism;

[0028] 21. Adapter component; 22. Linkage assembly; 23. Connecting component;

[0029] 221. Movable arm; 222. Connecting arm; 230. Mounting hole;

[0030] 3. Counterweight support;

[0031] 31. Sleeve; 32. Mounting boss; 33. Mounting column;

[0032] 311. Installation part; 312. Limiting part;

[0033] 4. Counterweight components;

[0034] 41. First counterweight; 42. Second counterweight;

[0035] 5. Third counterweight;

[0036] 6. Raise the cable. Detailed Implementation

[0037] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0038] Reference Figures 1 to 3As shown, an embodiment of this application proposes a seabed soil sampling device. The seabed soil sampling device may include a collection component 1, which has a hollow structure, and the two ends of the collection component 1 have a first port 101 and a second port 102. The first port 101 is used to discharge the medium inside the collection component 1, and the second port 102 is used to allow soil samples to enter the interior of the collection component 1; a counterweight mechanism is disposed on the collection component 1 for adjusting the weight of the collection component 1; and an opening and closing mechanism 2 is installed on the collection component 1 for connecting the lifting cable 6.

[0039] When the lifting force of the lifting cable 6 acts on the opening and closing mechanism 2, the opening and closing mechanism 2 can close the first port 101.

[0040] Specifically, in the technical solution adopted in this application, the sampling component 1 can extract soil samples by embedding itself into the seabed mud layer by gravity. Specifically, the medium inside the sampling component 1 is discharged from the first port 101, and the soil sample can enter the sampling component 1 from the second port 102. It should be explained that the medium inside the sampling component 1 can be seawater or air. The counterweight mechanism is used to provide a sinking force to the sampling component 1 so that the sampling component 1 can be smoothly inserted into the seabed mud layer. The counterweight mechanism can also provide a balancing force to the sampling component 1 so that the sampling component 1 is in a state perpendicular to the seabed mud layer during the sinking process. The opening and closing mechanism 2 is installed on the end of the sampling component 1 with the first port 101, and the opening and closing mechanism 2 is connected to the lifting cable 6. The seabed mud sampling device can be retrieved by the lifting cable 6. The key technical point of this application is that when the seabed soil sampling device is retrieved by the lifting cable 6, so that the lifting cable 6 applies a lifting force to the opening and closing mechanism 2, the opening and closing mechanism 2 can close the first port 101, creating a pressure difference between the inside and outside of the sampling component 1. This allows the soil sample entering the sampling component 1 through the second port 102 to be stably adsorbed inside the sampling component 1, effectively preventing the loss of some soil sample during the retrieval of the seabed soil sampling device. In use, when the seabed soil sampling device is sinking, since the lifting cable 6 does not apply a lifting force to the opening and closing mechanism 2, both the first port 101 and the second port 102 of the sampling component 1 are open. When the second port 102 of the sampling component 1 contacts the seabed soil layer with its downward-facing position, the counterweight mechanism on the sampling component 1 helps it embed itself into the seabed soil layer. The soil sample enters the interior of the sampling component 1 through the second port 102. After the sampling component 1 stabilizes, the seabed soil sample is retrieved by the lifting cable 6. The device applies a lifting force to the opening and closing mechanism 2. The opening and closing mechanism 2 closes the first port 101 of the collection component 1 through a linkage structure, so that both ends of the collection component 1 are in a closed state. The second port 102 of the collection component 1 is closed by the soil sample, while the first port 101 of the collection component 1 is closed by the opening and closing mechanism 2, so that the internal medium of the collection component 1 cannot flow out through the first port 101, and a pressure difference is formed between the inside and outside of the collection component 1, so that the soil sample can be stably adsorbed inside the collection component 1.

[0041] Furthermore, refer to Figure 1 and Figure 2As shown, in some embodiments, the opening and closing mechanism 2 includes: a transition component 21, sleeved on one end of the acquisition component 1, and the transition component 21 is connected to the first port 101; a linkage component 22, hinged to the transition component 21, for controlling the opening and closing of the transition component 21; and a connecting component 23, connected to the linkage component 22, the connecting component 23 having a mounting hole 230 for connecting the lifting cable 6.

[0042] Specifically, in the technical solution adopted in this application, after a connecting component 21 is fitted onto one end of the acquisition component 1 with the first port 101, the linkage component 22 is installed in a hinged manner through the connecting component 21, and closing the connecting component 21 through the linkage component 22 is equivalent to closing the first port 101 of the acquisition component 1. The linkage component 22 is then fitted onto the port of the connecting component 21 opposite to the acquisition component 1 through a hinged rotation mechanism to control the opening and closing of the connecting component 21; the connecting component 23 is connected to the linkage component 22, and the lifting cable 6 is threaded through the mounting hole 230 of the connecting component 23. When the connecting component 23 applies a lifting force to the linkage component 22, the lifting force can drive the linkage component 22 to rotate based on the connecting component 21 to close the port of the connecting component 21 opposite to the acquisition component 1.

[0043] Furthermore, refer to Figure 2 As shown, in some embodiments, the linkage component 22 includes: two movable arms 221, the middle of which is hinged to the adapter component 21, and the two movable arms 221 are arranged opposite to each other on the end port of the adapter component 21 away from the acquisition component 1, so as to form a closed end and a connecting end on the movable arms 221. When the two movable arms 221 are rotated to align the closed ends, the two movable arms 221 can cover the end port of the adapter component 21 away from the acquisition component 1; and two connecting arms 222, one end of which is connected to the connecting component 23, and the other end of which is hinged to the connecting end of the corresponding movable arm 221.

[0044] Specifically, in the technical solution adopted in this application, during the process of retrieving the seabed soil sampling device via the lifting cable 6, the connecting component 23 can transmit the lifting force to the two movable arms 221 through the two connecting arms 222, thereby causing the two movable arms 221 to rotate based on the adapter 21. The connecting ends of the two movable arms 221 rotate upwards, while the closed ends rotate downwards until the two movable arms 221 close onto the port of the adapter 21. Because a continuous lifting force is applied to the connecting component 23 and the linkage component 22 via the lifting cable 6 during the lifting process, the two movable arms 221 can continuously close onto the port of the adapter 21, thus ensuring that the soil sample is stably adsorbed inside the collection component 1, preventing the loss of some soil sample during the retrieval of the seabed soil sampling device.

[0045] Furthermore, refer to Figure 2 As shown, in some embodiments, the port of the adapter 21 near the acquisition component 1 gradually increases in size towards the other port to form a flared structure; the movable arm 221 on the linkage component 22 is hinged to the end of the adapter 21 away from the acquisition component 1.

[0046] Specifically, in the technical solution adopted in this application, the small-diameter port of the adapter 21 is adapted to the diameter of the acquisition component 1, so as to fix the adapter 21 on one end of the acquisition component 1 in a sleeve manner, and to connect one end of the adapter 21 with one end of the acquisition component 1; while the large-diameter port of the gripping component is away from the acquisition component 1, so as to facilitate the hinged installation of the two movable arms 221 on the adapter 21, thereby connecting the linkage component 22 and the acquisition component 1 through the adapter 21 to complete the adapter function of the adapter 21, and under the cooperation of the linkage component 22 and the adapter 21, the opening and closing of one end of the acquisition component 1, namely the first port 101, can be controlled.

[0047] Furthermore, refer to Figure 1 and Figure 3 As shown, in some embodiments, the counterweight mechanism includes: a counterweight bracket 3, mounted on the acquisition component 1; a counterweight assembly 4, disposed on the counterweight bracket 3 to adjust the balance and weight of the acquisition component 1; and a third counterweight 5, sleeved on the acquisition component 1 and located on the side of the counterweight bracket 3 opposite to the separation mechanism 2, the third counterweight 5 being used to guide the acquisition component 1 to orient the second port 102 toward the seabed mud layer.

[0048] Specifically, in the technical solution adopted in this application, after installing the counterweight bracket 3 on the collection component 1, a counterweight assembly 4 composed of several counterweight components is configured on the collection component 1 through the counterweight bracket 3. This allows some of the counterweight components to stabilize the balance of the collection component 1, while others further adjust the overall weight of the collection component 1. After adjusting the balance of the collection component 1, it ensures that the collection component 1 remains perpendicular to the seabed mud layer during descent. Adjusting the weight of the collection component 1 controls the depth to which it embeds into the seabed mud layer. A third counterweight 5 is fitted onto the collection component 1, and the third counterweight 5 is close to the second port 102 of the collection component 1. Thus, the weight of the third counterweight 5 guides the collection component 1 so that the end with the second port 102 faces downwards during descent, i.e., the second port 102 faces the seabed mud layer.

[0049] In one embodiment, the mud sampling component 1 is made of plexiglass material resistant to seawater corrosion, while the support frame 3 is made of stainless steel. This ensures that the entire sampling device can be used for a long time in the marine working environment without being corroded or damaged, while maintaining a certain strength, thereby extending its service life and ensuring that the collected mud samples are not contaminated, thus guaranteeing the purity and scientific research value of the mud samples.

[0050] Furthermore, refer to Figure 1 As shown, in some embodiments, the counterweight support 3 includes: a sleeve 31, which is sleeved on the collection component 1; and a mounting boss 32, which is connected to one end of the sleeve 31 near the opening and closing mechanism 2, and the mounting boss 32 extends in the radial direction of the collection component 1.

[0051] The counterweight assembly 4 includes: a first counterweight 41, symmetrically arranged on the mounting boss 32, used to form a balancing gravity on the acquisition component 1; and a second counterweight 42, installed on the sleeve 31, used to adjust the downward gravity of the acquisition component 1.

[0052] Specifically, in the technical solution adopted in this application, the sleeve 31 is fixedly installed on the sampling component 1 in a sleeve-like manner. The mounting boss 32 can be connected to the end of the sleeve 31 near the opening and closing mechanism 2, and the mounting boss 32 extends outward along the radial direction of the sampling component 1 to form a "balance wing" on the periphery of the sampling component 1. The first counterweight 41 is disposed on the mounting boss 32 as a balance counterweight on the sampling device. Thus, by adding or removing the first counterweight 41 on the mounting boss 32, the weight on both sides of the sampling device can be adjusted to achieve the balance of the sampling component during the sinking process. For example, it can keep the sampling component close to the vertical horizontal line or close to the vertical seabed mud layer. The second counterweight 42 is installed on the sleeve 31 in a sleeve-like manner. Thus, by adding or removing the second counterweight 42 on the sleeve 31, the weight of the sampling component 1 can be adjusted. This allows for further adjustment of the weight of the sampling component 1 to adapt to seabed mud layers of different hardness. At the same time, the depth of insertion of the sampling component 1 into the seabed mud layer can also be adjusted according to the hardness of the seabed mud layer.

[0053] Furthermore, refer to Figure 3 As shown, in some embodiments, it further includes: two mounting columns 33 symmetrically arranged on the mounting boss 32, and a first counterweight 41 detachably sleeved on the corresponding mounting column 33.

[0054] Specifically, in the technical solution adopted in this application, the first counterweight 41 is fitted onto the mounting column 33 so that the number of the first counterweight 41 can be increased or decreased on the mounting boss 32.

[0055] Furthermore, refer to Figure 3 As shown, in some embodiments, the sleeve 31 includes a mounting portion 311 and a limiting portion 312. The mounting boss 32 is detachably configured at one end of the mounting portion 311, and the limiting portion 312 is located at the end of the mounting portion 311 opposite to the mounting boss 32. The diameter of the limiting portion 312 is larger than the diameter of the mounting portion 311. The mounting portion 311 is used to accommodate the second counterweight 42, and the limiting portion 312 is used to restrict the second counterweight 42 from detaching from the mounting portion 311.

[0056] Specifically, in the technical solution adopted in this application, the end of the mounting part 311 away from the limiting part 312 can be connected to the mounting boss 32 by an interference fit, a threaded fit, or other means to achieve the detachable function. When the sleeve 31 is disassembled from the mounting boss 32, the second counterweight 42 can be sleeved on the mounting part 311 through the end of the mounting part 311 away from the limiting part 312. When the sleeve 31 is connected to the mounting boss 32, the limiting part 312 and the mounting boss 32 can restrict the second counterweight 42 on the mounting part 311, that is, between the limiting part 312 and the mounting boss 32, so as to prevent the second counterweight 42 from detaching from the mounting part 311.

[0057] Furthermore, refer to Figure 1 As shown, in some embodiments, the third counterweight 5 is configured as a conical structure, and the conical head of the third counterweight 5 faces the second port 102.

[0058] Specifically, in the technical solution adopted in this application, during the sinking process of the collection component 1, the third counterweight 5 can reduce the resistance of seawater through its conical structure, so as to further guide the collection component 1 to complete the sinking process with the end having the second port 102 facing downward.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process. Furthermore, the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved.

[0062] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0063] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. All or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware, the program being stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiments.

[0064] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. This storage medium can be a read-only memory, a disk, or an optical disk, etc.

[0065] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sampling device for seabed sediment, characterized in that, include: The collection component has a hollow structure, and the two ends of the collection component have a first port and a second port. The first port is used to discharge the medium inside the collection component, and the second port is used to allow soil samples to enter the interior of the collection component. A counterweight mechanism, disposed on the acquisition component, is used to adjust the weight of the acquisition component; and, An opening and closing mechanism is installed on the acquisition component, and the opening and closing mechanism is used to connect the lifting cable. When the lifting force of the lifting cable acts on the opening and closing mechanism, the opening and closing mechanism can close the first port.

2. The sampling device for seabed sediment according to claim 1, characterized in that, The opening and closing mechanism includes: An adapter is fitted onto one end of the acquisition component, and the adapter is connected to the first port; A linkage component, hinged to the adapter, is used to control the opening and closing of the adapter. A connecting component is connected to the linkage assembly. The connecting component has a mounting hole for connecting the lifting cable.

3. The sampling device for seabed sediment according to claim 2, characterized in that, The linkage component includes: Two movable arms are hinged at the middle of the adapter and arranged opposite each other on the end port of the adapter opposite to the acquisition component to form a closed end and a connecting end on the movable arms. When the two movable arms are rotated to connect the closed ends, the two movable arms can cover the end port of the adapter opposite to the acquisition component. Two connecting arms, one end of which is connected to the connecting component, and the other end of which is hinged to the connecting end of the corresponding movable arm.

4. The sampling device for seabed sediment according to claim 2 or 3, characterized in that, The adapter component gradually increases in size from one end near the acquisition component to the other end to form a flared structure; The movable arm on the linkage component is hinged to the end of the adapter component that is away from the acquisition component.

5. The sampling device for seabed sediment according to claim 1, characterized in that, The counterweight mechanism includes: A counterweight support is installed on the data acquisition component; A counterweight assembly is configured on the counterweight bracket to adjust the balance and weight of the data acquisition component; The third counterweight is fitted onto the acquisition component and located on the side of the counterweight bracket away from the opening and closing mechanism. The third counterweight is used to guide the acquisition component to face the second port toward the seabed mud layer.

6. The seabed sediment sampling device according to claim 5, characterized in that, The counterweight support includes: A sleeve is fitted onto the acquisition component; A mounting boss is connected to one end of the sleeve near the opening and closing mechanism, and the mounting boss extends radially along the acquisition component. The counterweight assembly includes: The first counterweight is symmetrically arranged on the mounting boss to form a balanced gravity on the data collection component. The second counterweight is installed on the sleeve and is used to adjust the downward weight of the collecting component.

7. The seabed sediment sampling device according to claim 6, characterized in that, Also includes: Two mounting columns are symmetrically arranged on the mounting protrusion, and the first counterweight is detachably sleeved on the corresponding mounting column.

8. The sampling device for seabed sediment according to claim 6, characterized in that, The sleeve includes a mounting part and a limiting part. The mounting boss is detachably disposed at one end of the mounting part. The limiting part is located at the end of the mounting part away from the mounting boss, and the diameter of the limiting part is larger than the diameter of the mounting part. The mounting part is used to accommodate the second counterweight, and the limiting part is used to restrict the second counterweight from detaching from the mounting part.

9. The sampling device for seabed sediment according to claim 5, characterized in that, The third counterweight is configured as a conical structure, with the conical head of the third counterweight facing the second port.

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