An underwater suspension sampling device and method

Abstract

The application belongs to the technical field of sampling devices, and discloses an underwater suspension liquid sampling device and method. Multiple automatic sample storage assemblies are arranged in a sealed box, and are matched with corresponding sampling extension pipes and control assemblies, so that independent control sampling of the multiple automatic sample storage assemblies is realized, the sampling requirements of multiple points, multiple time sequences and complex spaces in a complex underwater environment can be met, and the sampling mode is flexible, the application scenarios are wide, the operation is convenient, and the sampling efficiency is high. Each sampling extension pipe can extend to different types of complex underwater spaces for sampling, effectively improving the adaptability of the device to complex sampling environments. The sealed box and the sample inlet channel form a reliable seal, providing good waterproof protection for the driving unit and the control assembly. Each automatic sample storage assembly corresponds to an independent sealed sampling flow path, which is beneficial to maintaining the original state of the suspension liquid sample and improving the accuracy, authenticity and comparability of the sampling data.

Description

Technical Field

[0001] This invention relates to the field of sampling device technology, and in particular to an underwater suspension sampling device and method. Background Technology

[0002] With the continuous development and deepening of scientific research, the demand for collecting suspension samples from water bodies such as rivers, lakes, reservoirs, oceans, and groundwater is increasing, and these samples are widely used in environmental monitoring, hydrogeological surveys, marine scientific research, and ecological protection. Currently, underwater suspension sampling is usually completed using methods such as syringes, sampling bottles, water samplers, or water pumps.

[0003] However, most existing underwater suspension sampling devices adopt fixed sampling structures, which are applicable to a limited range of scenarios and are difficult to use for sampling in complex underwater spaces such as narrow crevices and winding channels. At the same time, the sampling methods of existing devices lack flexibility. Most devices can only complete single-point, single-time sampling. When multiple-point sampling or sampling at the same location at multiple times is required, it is usually necessary to repeatedly lift the equipment, change the sampling container, and lower it again. This is not only cumbersome and inefficient, but also makes it difficult to maintain consistent sampling conditions for different batches, affecting the comparability of sample data. It is difficult to meet the needs of multi-point, multi-time series, and complex space suspension sampling in complex aquatic environments. This not only increases the equipment cost and operational complexity of scientific research, but also limits the sampling efficiency and the accuracy of experimental data to a certain extent. Summary of the Invention

[0004] The purpose of this invention is to solve or at least alleviate some or all of the above-mentioned problems. Therefore, the purpose of this invention is to provide an underwater suspension sampling device and method that can meet the sampling needs of multiple points, multiple time sequences, and complex spaces in complex underwater environments, and has the advantages of flexible sampling methods, wide applicability, convenient operation, and high sampling efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution: An underwater suspension sampling device, comprising: A sealed box, wherein the sealed box has a pressure-bearing sealed cavity inside; Multiple sets of automatic sample storage assemblies are fixedly installed within the pressure-bearing sealed cavity of the sealed box. Each set of automatic sample storage assemblies forms an independent, sealed sampling flow path that is not interconnected with each other. Each set of automatic sample storage assemblies includes a sample storage cavity, a drive unit, a sample inlet channel, a power supply unit, and a piston. The output end of the drive unit is connected to the piston, and the piston is in a sealed sliding fit with the inner wall of the sample storage cavity. The drive unit can pull the piston to move axially back and forth along the inner wall of the sample storage cavity to facilitate the formation of negative pressure inside the sample storage cavity for quantitative aspiration of the suspension. The sample inlet channel communicates with the sample storage cavity and extends out of the sealed box and is sealed to the sealed box. The power supply unit is electrically connected to the drive unit and can continuously supply power to the drive unit. Multiple sampling extension tubes, each capable of extending into different types of underwater spaces, and each sampling extension tube being detachably and sealed to the corresponding sampling channel, for introducing the suspension to be collected into the sampling chamber of the corresponding automatic sampling assembly; The control component is connected to multiple sets of the automatic sample storage components, and is used to control any one set of the automatic sample storage components to independently complete the sampling action, either in groups or individually.

[0006] In some alternative embodiments, multiple sets of the automatic sample storage components are arranged side by side in sequence along the width direction of the sealed box, and each set of the automatic sample storage components extends along the length direction of the sealed box, with the sample inlet channel of each automatic sample storage component passing through the same side wall of the sealed box.

[0007] In some alternative embodiments, a plurality of fixing frames are provided inside the sealed box, and the plurality of fixing frames are respectively provided corresponding to a plurality of sets of automatic sample storage components. The fixing frames can limit and fix each set of automatic sample storage components inside the sealed box.

[0008] In some alternative embodiments, the sealed box is provided with at least three sets of automatic sample storage components.

[0009] In some alternative embodiments, the drive unit includes an electric push rod, the pushing end of which is connected to the piston for driving the piston to move.

[0010] In some alternative embodiments, multiple power supply units are provided, and the multiple power supply units are fixedly installed inside the sealed box. Each power supply unit is electrically connected to each drive unit to provide power to each group of automatic sample storage components.

[0011] In some optional embodiments, the control component includes a control line and a controller. One end of the control line is electrically connected to the power supply unit, and the other end is electrically connected to the controller. The control line is also sealed to the sealed box. The controller is equipped with a manual button control module and a remote communication control module to facilitate the manual issuance of sampling commands or the remote issuance of timing control commands on site.

[0012] In some alternative embodiments, the underwater suspension sampling device further includes multiple waterproof connectors, each with a double-layer O-ring seal inside. The waterproof connectors can connect the sample inlet channel and the sealed box, as well as the control line and the sealed box.

[0013] In some alternative embodiments, the sampling extension tube includes a flexible tube or a rigid tube.

[0014] A method for underwater suspension sampling, characterized by employing multiple underwater suspension sampling devices as described above, includes the following steps: S1: Determine the number of sampling points and the number of sampling times according to the test conditions, and deploy multiple underwater suspension sampling devices at different sampling locations in the target water area; S2: Based on the spatial type of each sampling point, select the corresponding type of sampling extension tube for each automatic sampling component, guide each sampling extension tube to the corresponding sampling area, and connect it to the sampling channel of the corresponding automatic sampling component through a detachable sealing method, and place the end of the sampling extension tube into the target sampling layer. S3: The control component controls multiple sets of automatic sample storage components in the multiple underwater suspension sampling devices. The control method includes group control or independent control, so that each automatic sample storage component performs suspension sampling actions according to a set time sequence to achieve multi-point synchronous sampling or single-point multiple sampling, wherein: If a multi-point synchronous sampling mode is adopted: the control component sends control commands to the preset automatic sample storage components in each of the underwater suspension sampling devices at the same time, so that each corresponding automatic sample storage component performs a sampling action synchronously. After a set time interval, the control component sends control commands to other preset automatic sample storage components in each of the underwater suspension sampling devices to repeat the synchronous sampling of different groups of automatic sample storage components, so as to obtain spatially synchronous samples at different sampling locations. If a single-point multiple sampling mode is adopted: the control component sends control commands to multiple sets of automatic sample storage components in the preset underwater suspension sampling device, so that the automatic sample storage components in the preset underwater suspension sampling device synchronously perform a sampling action. After a set time interval, the control component sends control commands to multiple sets of automatic sample storage components in other preset underwater suspension sampling devices, and repeats the sampling action on each underwater suspension sampling device in chronological order to obtain multiple time-series samples at the sampling location. S4: After completing the set number of samplings, retrieve the sealed box, and control the drive unit in each of the automatic sample storage components to reverse the action, so that the sample in the sample storage chamber is discharged, and each sample is marked and recorded to correspond to different sampling positions and sampling order.

[0015] The beneficial effects of this invention are: This invention provides an underwater suspension sampling device and method, including a sealed box, multiple sets of automatic sample storage components, multiple sampling extension tubes, and a control component. By setting multiple sets of automatic sample storage components within the sealed box, and cooperating with corresponding sampling extension tubes and control components, independent control sampling of multiple sets of automatic sample storage components can be achieved. This can meet the sampling needs of multiple points, multiple time sequences, and complex spaces in complex underwater environments. The sampling method is flexible, applicable to a wide range of scenarios, and easy to operate, significantly improving sampling efficiency. Each sampling extension tube includes different specifications and types, capable of extending into different types of complex underwater spaces such as narrow gaps and winding channels for sampling, effectively improving the device's adaptability to complex sampling environments. A reliable seal is formed between the sealed chamber and the sample inlet channel, providing excellent waterproof protection for the drive unit and control components, and improving the stability and reliability of the device in underwater environments. The sampling extension tube and the sample inlet channel are connected by a detachable sealed connection, which facilitates quick replacement of the sampling extension tube and effectively prevents leakage or air intake during sampling, ensuring the efficiency of the drive and the accuracy of the sample volume. Each automatic sample storage component corresponds to an independent sealed sampling flow path, reducing the contact between the sample and the external environment during transportation and storage, reducing the risk of cross-contamination between different samples, helping to maintain the original state of the suspension sample, and improving the accuracy, authenticity, and comparability of the sampling data. Attached Figure Description

[0016] Figure 1 This is a three-dimensional perspective view of the underwater suspension sampling device described in this invention; Figure 2 This is a schematic diagram of the underwater suspension sampling device described in this invention; Figure 3 This is a schematic diagram of the multi-point synchronous sampling mode of the underwater suspension sampling method described in this invention; Figure 4This is a schematic diagram of the single-point multiple sampling mode of the underwater suspension sampling method described in this invention.

[0017] In the picture: 1. Sealed box; 2. Automatic sample storage assembly; 21. Sample storage chamber; 22. Drive unit; 23. Sample inlet channel; 24. Power supply unit; 25. Piston; 3. Control components; 31. Control lines; 32. Controller. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0020] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," "combined," "coupled," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection via an intermediate medium; or the internal communication of two components or the interaction between two components. As examples, a direct connection refers to two parts or components being connected together without the need for an intermediate medium, while an indirect connection refers to two parts or components each being connected to at least one intermediate medium, with the connection achieved through the intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0022] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0023] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0024] In this invention, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientations or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, in the context, it should be understood that when an element is mentioned as being "upper" or "lower" than another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as "upper side," "lower side," "left side," "right side," "front side," and "rear side" not only represent positive orientation but can also be understood as lateral orientation. For example, "above," "on top of," "upper side of," and "above" the first feature "above" or "on the second feature" includes the first feature being directly above, to the upper left, to the upper right, to the upper front, and to the upper rear of the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. The terms "below," "under," "below," and "below" for "first feature" and "second feature" include situations where the first feature is directly below, to the lower left, to the lower right, in front of, or behind the second feature, or simply indicate that the first feature is at a lower horizontal level than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0025] Please refer to Figure 1 and Figure 2This embodiment provides an underwater suspension sampling device, including a sealed box 1, multiple sets of automatic sample storage components 2, multiple sampling extension tubes, and a control component 3. The sealed box 1 has a pressure-bearing sealed cavity inside. The multiple sets of automatic sample storage components 2 are fixedly installed in the pressure-bearing sealed cavity of the sealed box 1. Each set of automatic sample storage components 2 forms an independent sealed sampling flow path that is not interconnected. Each set of automatic sample storage components 2 includes a sample storage cavity 21, a drive unit 22, a sample inlet channel 23, a power supply unit 24, and a piston 25. The output end of the drive unit 22 is connected to the piston 25. The piston 25 is in a sealed sliding fit with the inner wall of the sample storage cavity 21. The drive unit 22 can pull the piston 25 along the inner wall of the sample storage cavity 21. The system reciprocates to create negative pressure inside the sample storage chamber 21 for quantitative aspiration of the suspension; the sample inlet channel 23 is connected to the sample storage chamber 21 and extends out of the sealed box 1 and is sealed to the sealed box 1; the power supply unit 24 is electrically connected to the drive unit 22 and can supply power to the drive unit 22; multiple sampling extension tubes can extend into different types of underwater spaces, and each sampling extension tube is detachably and sealed to the corresponding sample inlet channel 23 to introduce the suspension to be collected into the sample storage chamber 21 of the corresponding automatic sample storage component 2; the control component is connected to multiple automatic sample storage components 2 to control any one group of automatic sample storage components 2 to independently complete the sampling action.

[0026] By installing multiple automatic sampling components 2 within the sealed enclosure 1, along with corresponding sampling extension tubes and control components 3, independent sampling control of multiple sets of automatic sampling components 2 is achieved. Each set of automatic sampling components 2 can form an independent, sealed sampling flow path that is not interconnected, allowing the device to complete multi-point sampling or multi-time-sequence sampling at the same location with a single deployment, eliminating the need for repeated equipment lifting or sampling container replacement, significantly improving sampling efficiency. The sampling extension tubes include different specifications and types, enabling them to extend into various complex underwater spaces such as narrow slits and winding channels for sampling, effectively improving the device's adaptability to complex sampling environments. A reliable seal is formed between the sealed box 1 and the sample inlet channel 23, providing good waterproof protection for the drive unit 22 and control components 3, and improving the stability and reliability of the device in an underwater environment. The sampling extension tube and the sample inlet channel 23 are connected by a detachable sealed connection, which facilitates quick replacement of the sampling extension tube and effectively prevents leakage or air intake during sampling, ensuring the driving suction efficiency and the accuracy of the sampling volume. Each automatic sample storage component 2 corresponds to an independent sealed sampling flow path, reducing the contact between the sample and the external environment during transportation and storage, reducing the risk of cross-contamination between different samples, helping to maintain the original state of the suspension sample, and improving the accuracy, authenticity and comparability of the sampling data.

[0027] In the initial state, the piston 25 of the underwater suspension sampling device is located in the sample storage chamber 21 near the sample inlet channel 23. During sampling, the control component 3 controls the drive unit 22 to start and drive the piston 25 to move away from the sample inlet channel 23. Due to the sealed sliding fit between the piston 25 and the inner wall of the sample storage chamber 21, the movement of the piston 25 creates a negative pressure environment in the sample storage chamber 21. Under the action of pressure difference, the external suspension is drawn into the sample storage chamber 21 through the sampling extension tube and the sample inlet channel 23. When the piston 25 moves to the preset stroke position, it stops, thus completing one quantitative sampling. After sampling, the piston 25 is in a static force balance state when it is stopped. The suspension in the sample storage chamber 21 cannot change volume without external force, thus avoiding liquid flow or leakage. When it is necessary to discharge or seal the sample, the drive unit 22 drives the piston 25 to move in the opposite direction, reducing the volume of the sample storage chamber 21, thereby compressing or quantitatively sealing the suspension in the chamber. By employing a positive displacement piston injection method, precise control of the sampling volume can be achieved, improving the consistency and repeatability of sampling results. Simultaneously, since the fluid flows only within the sealed sample storage chamber 21 and the injection channel 23, contact with the external environment is reduced, which helps maintain the original state of the suspension sample and reduces the risk of contamination. Furthermore, this structure has no complex suction components, making it suitable for environments containing particulate suspensions, and it has good anti-clogging capabilities and operational reliability. Additionally, the piston 25 can be made of rubber; no specific limitation is made here. The power supply unit 24 continuously supplies power to the drive unit 22, enabling the drive unit 22 to continuously and stably drive the piston 25, thereby ensuring the continuity and stability of the sampling process.

[0028] Specifically, the sampling extension tube includes either a flexible or rigid tube to adapt to different underwater sampling space structures. The flexible tube has good flexibility and deformation capabilities, enabling it to adapt to narrow gaps, winding channels, or complex obstacle environments, allowing the sampling end to enter the target sampling area. The rigid tube has high structural rigidity, maintaining a relatively stable flow channel morphology during sampling, reducing flow resistance changes caused by tube deformation, thereby improving the stability and consistency of the sampling flow rate. By offering the option of flexible or rigid tubes, this device can select the appropriate sampling extension tube type according to different underwater environmental conditions, thus improving the device's environmental adaptability and application range.

[0029] In this embodiment, the automatic sample storage components 2 are arranged side-by-side sequentially along the width direction of the sealed box 1, and each automatic sample storage component 2 extends along the length direction of the sealed box 1. The sample inlet channels 23 of each automatic sample storage component 2 all extend through the same side wall of the sealed box 1. The arrangement of multiple automatic sample storage components 2 side-by-side sequentially along the width direction of the sealed box 1 is equivalent to a modular array layout, ensuring that each automatic sample storage component 2 does not interfere with others, and resulting in a compact structure that improves the utilization rate of the internal space of the sealed box 1 and reduces the overall size of the device. Simultaneously, the fact that the sample inlet channels 23 of each automatic sample storage component 2 all extend through the same side wall of the sealed box 1 facilitates the centralized connection and arrangement of multiple sampling extension tubes, reduces pipe cross-entanglement, and improves the convenience of on-site installation and operation.

[0030] In some optional embodiments, multiple fixing frames are provided inside the sealed box 1, and each fixing frame corresponds to a multiple set of automatic sample storage components 2. The fixing frames can limit and fix each set of automatic sample storage components 2 within the sealed box 1. The fixing frames can support and position the corresponding automatic sample storage components 2, keeping them in a predetermined installation position within the sealed box 1 and preventing shaking or displacement. Furthermore, the fixing frames can limit the positional changes of the automatic sample storage components 2 relative to the sealed box 1, reducing the pulling or off-center loads generated by the automatic sample storage components 2 on the sample inlet channel 23 and the through-box sealing connection, thus improving the reliability of the sealing connection; at the same time, it can also reduce vibration and improve sampling stability.

[0031] Specifically, three sets of automatic sample storage components 2 are installed inside the sealed box 1. The three sets of automatic sample storage components 2 are arranged side by side along the width direction of the sealed box 1, and each set of automatic sample storage components 2 is fixed to the sealed box 1 by a fixing frame.

[0032] In other embodiments, two, four, or five sets of automatic sample storage components 2 may be provided inside the sealed box 1. No specific limitation is made here, and the determination is made according to the actual sampling needs.

[0033] In some embodiments, the drive unit 22 includes an electric push rod, the pushing end of which is connected to the piston 25 for driving the piston 25 to reciprocate within the sample storage chamber 21. Using an electric push rod to drive the piston 25 provides a stable, continuous, and controllable driving force, enabling the piston 25 to move according to a preset stroke and speed, thereby achieving quantitative intake and discharge of the suspension and improving the stability and repeatability of the sampling process.

[0034] In other embodiments, the drive unit 22 may also be a pneumatic cylinder or a hydraulic cylinder, without specific limitations.

[0035] Furthermore, multiple power supply units 24 are provided, and multiple power supply units 24 are fixedly installed in the sealed box 1. Each power supply unit 24 is electrically connected to each drive unit 22 to provide power to each group of automatic sample storage components 2. By configuring an independent power supply unit 24 for each drive unit 22, each automatic sample storage component 2 forms an independent power supply and drive system, which makes the response of each drive more consistent, and will not cause travel deviation due to voltage attenuation, making each sampling action more controllable.

[0036] Specifically, the power supply unit 24 can be a rechargeable battery, without any specific limitation. By using a battery as the power supply unit 24, the device can operate independently without an external power source, thereby avoiding the need for external power lines and enclosure interfaces, reducing weak points in the seal, and improving the overall sealing reliability of the sealed enclosure 1. At the same time, the battery can provide a continuous and stable power supply to the drive unit 22 to support multiple cyclic sampling operations of multiple automatic sampling components 2 in the underwater environment, thereby improving the device's endurance and long-term unattended operation capability.

[0037] In some embodiments, the control component 3 includes a control line 31 and a controller 32. One end of the control line 31 is electrically connected to the power supply unit 24, and the other end is electrically connected to the controller 32. The control line 31 is also sealed to the sealed box 1. The controller 32 is equipped with a manual button control module and a remote communication control module to facilitate manual issuance of sampling commands or remote issuance of timing control commands on-site. By setting the control line 31 to pass through the sealed box 1, the power supply unit 24 and drive unit 22 inside the sealed box 1 can achieve a reliable electrical connection with the external controller 32. At the same time, it avoids setting multiple independent control interfaces on the sealed box 1, thereby reducing the number of sealing penetration points, reducing the risk of water leakage, and improving the reliability of the sealing structure. The controller 32 provides a charging serial port and mounting control elements for the control line 31, enabling it to charge the power supply unit 24 and achieve manual control sampling. This facilitates centralized control and unified scheduling of multiple automatic sampling components 2, allowing operators to control the underwater automatic sampling components 2 manually and remotely. This improves the coordination between multi-point synchronous sampling and single-point multiple sampling modes, simplifies the internal wiring structure, and enhances system modularity and ease of assembly and maintenance. Furthermore, the controller 32 is equipped with a manual button control module and a remote communication module, supporting both on-site manual and remote control. When operators are near the equipment, they can quickly issue sampling commands via the manual button control module, facilitating equipment debugging, maintenance, and temporary sampling. When the equipment is installed in an inaccessible or hazardous environment, the remote communication module can remotely issue timing control commands to achieve timed sampling or automatic sampling according to a preset program, reducing on-site personnel operation and improving sampling efficiency and ease of use. Meanwhile, the combination of on-site control and remote control can enhance the equipment's environmental adaptability and control flexibility, meet the sampling needs under different working conditions, and improve the reliability and automation level of sampling work.

[0038] To ensure the sealing reliability within the sealed chamber 1, in some embodiments, the underwater suspension sampling device further includes multiple waterproof joints. Each waterproof joint has a double-layer O-ring seal. The waterproof joints can connect the sample inlet channel 23 and the sealed chamber 1, as well as the control line 31 to the sealed chamber 1. This allows the sample inlet channel 23 and the control line 31 to be reliably connected to the sealed chamber 1 using a standardized sealing method, avoiding the sealing instability problems caused by direct perforation sealing, thereby improving the waterproof reliability of the connection. The waterproof joint is existing technology and will not be described in detail here. Furthermore, a double-layer O-ring seal is provided inside the waterproof joint, and radial sealing is achieved through axial compression to improve the water pressure resistance and sealing reliability of the connection.

[0039] like Figure 3 and Figure 4As shown, this embodiment also provides an underwater suspension sampling method, employing multiple underwater suspension sampling devices from any of the above embodiments, including the following steps: S1: Determine the number of sampling points and the number of sampling times based on the test conditions, and deploy multiple underwater suspension sampling devices at different sampling locations in the target water area; S2: Based on the spatial type of each sampling point, select the corresponding type of sampling extension tube for each automatic sampling component 2, guide each sampling extension tube to the corresponding sampling area, and connect it to the sampling channel 23 of the corresponding automatic sampling component 2 through a detachable sealing method, and place the end of the sampling extension tube to the target sampling layer. S3: The control component 3 controls multiple automatic sample storage components 2 in multiple underwater suspension sampling devices. The control method includes group control or independent control, so that each automatic sample storage component 2 performs suspension sampling actions according to a set time sequence, so as to achieve multi-point synchronous sampling or single-point multiple sampling, wherein: (a) If a multi-point synchronous sampling mode is adopted: the control component 3 sends a control command to the preset automatic sample storage component 2 in each underwater suspension sampling device at the same time, so that each corresponding automatic sample storage component 2 performs a sampling action synchronously. After a set time interval, the control component 3 sends a control command to other preset automatic sample storage components 2 in each underwater suspension sampling device to repeat the synchronous sampling of different groups of automatic sample storage components 2, so as to obtain spatial synchronous samples at different sampling locations. (b) If a single-point multiple sampling mode is adopted: the control component 3 sends control commands to multiple automatic sample storage components 2 in the preset underwater suspension sampling device, so that the automatic sample storage components 2 in the preset underwater suspension sampling device simultaneously perform a sampling action. After a set time interval, the control component 3 sends control commands to multiple automatic sample storage components 2 in other preset underwater suspension sampling devices, and repeats the sampling action on each underwater suspension sampling device in chronological order to obtain multiple time-series samples at the sampling location. S4: After completing the set number of samplings, retrieve the sealed box 1, and control the drive unit 22 in each automatic sample storage component 2 to reverse the action, so that the sample in the sample storage chamber 21 is discharged, and each sample is marked and recorded to correspond to different sampling positions and sampling order.

[0040] By deploying multiple underwater suspension sampling devices at different sampling locations and combining them with replaceable sampling extension tubes and group / independent control methods, each device can flexibly construct a multi-point synchronous sampling mode or a single-point multiple sampling mode according to the experimental conditions, achieving synchronous acquisition of spatial distribution characteristics and temporal variation characteristics in complex aquatic environments. Simultaneously, by completing time-sharing sampling of multiple automatic sample storage components 2 during a single deployment, the problem of repeatedly hoisting equipment and changing sampling containers required in traditional underwater sampling is avoided, significantly improving sampling efficiency and reducing operational complexity. Furthermore, by uniformly identifying and recording samples after sampling, samples from different sampling locations and at different sampling times have a clear correspondence, improving the traceability, comparability, and accuracy of experimental analysis of sample data, thereby meeting the engineering requirements for multi-dimensional suspension sampling in complex aquatic environments.

[0041] In the multi-point synchronous sampling mode, the control component 3 groups and selects the corresponding sampling units from multiple underwater suspension sampling devices deployed at different sampling locations, and issues control commands at the same time to enable each sampling unit to perform sampling actions synchronously. This achieves synchronous sampling at different sampling locations under the same time conditions, and the synchronous sampling process can be repeated at preset time intervals to obtain comparative samples from different spatial locations under the same time reference. In the single-point multiple sampling mode, the control component 3 controls only the underwater suspension sampling device corresponding to the same sampling location, uses multiple sample storage units inside the device to perform sampling actions synchronously, and switches to the underwater suspension sampling device corresponding to other sampling locations after a set time interval to repeat the above sampling process. This allows for continuous water sample acquisition at different sampling locations at different time points without the need for repeated equipment deployment.

[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An underwater suspension sampling device, characterized in that, include: A sealed box (1) is provided with a pressure-bearing sealing cavity inside the sealed box (1); Multiple sets of automatic sample storage components (2) are fixedly installed in the pressure-bearing sealed cavity of the sealed box (1). Each set of automatic sample storage components (2) forms an independent sealed sampling flow path that is not interconnected with each other. Each set of automatic sample storage components (2) includes a sample storage cavity (21), a drive unit (22), a sample inlet channel (23), a power supply unit (24), and a piston (25). The output end of the drive unit (22) is connected to the piston (25). The piston (25) is connected to the sample storage cavity (21). The wall is sealed and slidingly fitted. The drive unit (22) can pull the piston (25) to move axially back and forth along the inner wall of the sample storage chamber (21) so as to form a negative pressure inside the sample storage chamber (21) for quantitative aspiration of the suspension. The sample inlet channel (23) is connected to the sample storage chamber (21) and the sample inlet channel (23) extends out of the sealed box (1) and is sealed to the sealed box (1). The power supply unit (24) is electrically connected to the drive unit (22) and can continuously supply power to the drive unit (22). Multiple sampling extension tubes, each of which can extend into different types of underwater spaces, and each of which is detachably and sealed to the corresponding sampling channel (23) for introducing the suspension to be collected into the sampling chamber (21) of the corresponding automatic sampling assembly (2); The control component (3) is connected to multiple sets of the automatic sample storage components (2) respectively, and is used to control any one set of the automatic sample storage components (2) to independently complete the sampling action.

2. The underwater suspension sampling device according to claim 1, characterized in that, Multiple sets of the automatic sample storage components (2) are arranged side by side along the width direction of the sealed box (1), and each set of the automatic sample storage components (2) extends along the length direction of the sealed box (1). The sample inlet channel (23) of each automatic sample storage component (2) passes through the same side wall of the sealed box (1).

3. The underwater suspension sampling device according to claim 2, characterized in that, Multiple fixing frames are provided inside the sealed box (1), and the multiple fixing frames are respectively provided with multiple sets of automatic sample storage components (2). The fixing frames can limit and fix each set of automatic sample storage components (2) inside the sealed box (1).

4. The underwater suspension sampling device according to claim 3, characterized in that, At least three sets of automatic sample storage components (2) are provided inside the sealed box (1).

5. The underwater suspension sampling device according to claim 1, characterized in that, The drive unit (22) includes an electric push rod, the push end of which is connected to the piston (25) for driving the piston (25) to move.

6. The underwater suspension sampling device according to claim 5, characterized in that, Multiple power supply units (24) are provided, and multiple power supply units (24) are fixedly installed in the sealed box (1). Each power supply unit (24) is electrically connected to each drive unit (22) to provide power to each group of automatic sample storage components (2).

7. The underwater suspension sampling device according to claim 1, characterized in that, The control component (3) includes a control line (31) and a controller (32). One end of the control line (31) is electrically connected to the power supply unit (24), and the other end is electrically connected to the controller (32). The control line (31) is sealed to the sealed box (1). The controller (32) is equipped with a manual button control module and a remote communication remote control module to facilitate the manual issuance of sampling commands or the remote issuance of timing control commands on site.

8. The underwater suspension sampling device according to claim 7, characterized in that, The underwater suspension sampling device also includes multiple waterproof connectors. The waterproof connectors are equipped with double O-ring seals inside. The waterproof connectors can connect the sample inlet channel (23) and the sealed box (1) respectively, as well as the control line (31) and the sealed box (1).

9. The underwater suspension sampling device according to claim 1, characterized in that, The sampling extension tube includes a flexible tube or a rigid tube.

10. A method for sampling underwater suspensions, characterized in that, Employing multiple underwater suspension sampling devices as described in any one of claims 1-9 Includes the following steps: S1: Determine the number of sampling points and the number of sampling times according to the test conditions, and deploy multiple underwater suspension sampling devices at different sampling locations in the target water area; S2: According to the spatial type of each sampling point, select the corresponding type of sampling extension tube for each automatic sample storage component (2), guide each sampling extension tube to the corresponding sampling area, and connect it to the sampling channel (23) of the corresponding automatic sample storage component (2) through a detachable sealing method, and place the end of the sampling extension tube to the target sampling layer. S3: The control component (3) controls multiple sets of automatic sample storage components (2) in the multiple underwater suspension sampling devices. The control method includes group control or independent control, so that each automatic sample storage component (2) performs suspension sampling actions according to a set time sequence to achieve multi-point synchronous sampling or single-point multiple sampling, wherein: (a) If a multi-point synchronous sampling mode is adopted: the control component (3) sends a control command to the preset automatic sample storage component (2) in each of the underwater suspension sampling devices at the same time, so that each corresponding automatic sample storage component (2) performs a sampling action synchronously. After a set time interval, the control component (3) sends a control command to other preset automatic sample storage components (2) in each of the underwater suspension sampling devices to repeatedly perform synchronous sampling of different groups of automatic sample storage components (2) to obtain spatial synchronous samples at different sampling locations. (b) If a single-point multiple sampling mode is adopted: the control component (3) sends control commands to multiple sets of automatic sample storage components (2) in the preset underwater suspension sampling device, so that the automatic sample storage components (2) in the preset underwater suspension sampling device synchronously perform a sampling action, and after a set time interval, the control component (3) sends control commands to multiple sets of automatic sample storage components (2) in other preset underwater suspension sampling devices, and repeats the sampling action on each underwater suspension sampling device in time order to obtain multiple time-series samples at the sampling location; S4: After completing the set number of samplings, retrieve the sealed box (1), and control the drive unit (22) in each of the automatic sample storage components (2) to reverse the action through the control component (3) so that the sample in the sample storage chamber (21) is discharged, and each sample is marked and recorded to correspond to different sampling positions and sampling order.

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