Marine monitoring sampling device with different-depth multi-time sampling function

Abstract

The invention discloses an ocean monitoring sampling device with different-depth multiple sampling, and relates to the technical field of ocean sampling, the ocean monitoring sampling device comprises a support frame, a winch assembly is arranged at the end of the support frame, a rope is arranged at the end of the winch assembly, the winch assembly drives the length of the rope to be adjusted, and the free end, away from the winch assembly, of the rope is connected with a sampling assembly; the sampling assembly comprises a first sampling barrel and a second sampling barrel, the first sampling barrel and the second sampling barrel are the same in structure and are fixed through bolts, and an impurity removal assembly is arranged in the source power part. When the extension rod rotates, the cleaning hook arranged on the surface of the extension rod scrapes the surface of the upper isolation shell, and the cleaning hook and the surface of the upper isolation shell form an included angle of 15 degrees, so that sea grass attached to the surface of the upper isolation shell can be quickly removed, a water inlet is prevented from being blocked, and the seawater collection efficiency is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of marine sampling technology, and in particular to a marine monitoring sampling device for multiple sampling at different depths. Background Technology

[0002] In marine environmental monitoring, the physicochemical properties and biological components of water bodies vary significantly with depth. Obtaining water samples from multiple depth layers is the core foundation for conducting pollution source tracing and ecological assessment. Currently, seawater sampling is often carried out by ship-mounted hydrological survey winches that drive sampling components.

[0003] There are many existing technologies for sampling components, such as: Chinese invention patent CN112249943A discloses a marine monitoring sampling device for multiple sampling at different depths, comprising a support body, a counterweight suspended at the front end of the support body, and a first water tank welded to the lower end of the counterweight. The first water tank includes a first cover plate, the upper surface of which is welded to the lower surface of the counterweight. A side wall of the water tank is welded to the lower surface of the first cover plate, and a water inlet is welded to the side of the side wall. A filter screen is welded to the right side of the water inlet, and a spherical shell is welded to the left side of the water inlet. A water inlet pipe is welded to the lower end of the spherical shell, and a water control ball is placed inside the spherical shell. This invention solves the problems of traditional sampling components being unable to sample seawater at corresponding different depths and being unable to sample water quality multiple times in a single operation. It makes the depth of the sampled water quality visible and intuitive, improves the efficiency of marine water quality sampling, and reduces the cost of sampling operations.

[0004] However, some problems still exist in actual use: 1. In actual operation, when there are a large number of aquatic plants such as seaweed in the sampling area, traditional seawater sampling components are prone to entanglement and accumulation at the inlet of the sampling bucket due to water flow, forming physical blockage. This problem will directly prevent seawater from smoothly entering the sampling bucket. Not only will operators need to frequently stop the machine to clean the inlet, extending the operation time of a single sampling, but the blockage may also lead to insufficient sampling volume, seriously reducing the overall sampling efficiency. 2. After seawater sampling, the seawater sample contains various microorganisms (such as bacteria and algae), which easily attach to, proliferate, and form biofilms on the inner surface of the sampling container. When the seawater sample is poured out for subsequent testing and analysis, the attached microorganisms cannot be completely transferred to the testing container with the sample. This results in a discrepancy between the actual number of microorganisms tested and the original state of the seawater, affecting the accuracy of the assessment results on seawater quality and ecological conditions, and leading to distorted test data. Summary of the Invention

[0005] In order to overcome the above-mentioned defects in the prior art, the present invention provides a marine monitoring sampling device for multiple sampling at different depths.

[0006] To achieve the above objectives, the present invention provides a marine monitoring sampling device for multiple sampling at different depths, comprising a support frame, a winch assembly at one end of the support frame, a rope at one end of the winch assembly, the rope length being adjusted by the winch assembly, a sampling component connected to the free end of the rope away from the winch assembly, the sampling component comprising a first sampling bucket and a second sampling bucket, the first and second sampling buckets having identical structures and being fixed together by bolts, the first and second sampling buckets respectively having an upper isolation shell and a lower isolation shell, the upper isolation shell having an ear plate on its exterior. The plate is fixed to the end of the rope. The first sampling bucket is equipped with a partition plate that divides the inside of the first sampling bucket into a water storage section and a power source section. The power source section is equipped with a debris removal component, which is used to scrape the surface of the upper isolation shell to dislodge seaweed and other foreign objects attached to the surface of the upper isolation shell. The water storage section of the first sampling bucket is equipped with a sealing component to seal the seawater collected into the first sampling bucket. The water storage section is equipped with a wall scraping component, which is used to control the opening and closing of the sealing component and to scrape the inner wall of the water storage section to mix the microorganisms attached to the inner wall with the seawater.

[0007] Furthermore, the upper isolation shell is provided with a ramp plate near the bottom, and the ramp plate is arranged in a ring array.

[0008] Furthermore, the 3 includes a motor located in the power source unit. The output shaft of the motor is provided with a connecting shaft. The surface of the connecting shaft is provided with a main gear. The top of the connecting shaft is provided with an extension rod. The extension rod is threadedly connected and fixed to the connecting shaft. When the output shaft of the motor drives the connecting shaft to rotate, the connecting shaft drives the extension rod to rotate coaxially.

[0009] Furthermore, the extension rod has a fixed rod at its end, a rotating rod is rotatably provided on the surface of the fixed rod, a cleaning hook is provided on the surface of the rotating rod, the cleaning hooks are arranged in an array along the surface of the rotating rod, a torsion spring is provided on the surface of the extension rod, the two ends of the torsion spring are respectively fixed to the ends of the extension rod and the rotating rod, and the cleaning hooks provided on the surface of the rotating rod are subjected to the force of the torsion spring and form a 15° angle with the surface of the upper isolation shell.

[0010] Furthermore, the main gear is provided with auxiliary gear rods on both sides, the auxiliary gear rods pass through the partition plate to the water storage part, and the bottom of the auxiliary gear rods is provided with fan blades, the fan blades being arranged at different heights.

[0011] Furthermore, the sealing assembly includes a water inlet pipe disposed in the water storage section. The water inlet pipe is annular and stepped, with the opening on the side closer to the water storage section being smaller than the opening on the side farther from the water storage section.

[0012] Furthermore, the water inlet pipe has a perforated bottom plate on the side near the water storage section and a sealing plate on the side away from the water storage section. A compression spring is provided between the perforated bottom plate and the sealing plate. The diameter of the sealing plate is larger than the opening channel at the step of the water inlet pipe. Under normal circumstances, the sealing plate is moved away from the opening channel of the step of the water inlet pipe by the force of the compression spring, and seawater can enter the first sampling bucket through the water inlet pipe for collection.

[0013] Furthermore, a traction rope is provided at the center of the end of the sealing plate, and a fixed pulley is provided at the end of the hollow bottom plate. By stretching the traction rope, the sealing plate is moved along the inner wall of the water inlet pipe to the stepped opening for sealing. When the traction rope moves, it fits against the bottom of the fixed pulley.

[0014] Furthermore, the scraping assembly includes a scraper located inside the water storage section. A through groove is formed in the quadrant of the scraper, and the diameter of the through groove is twice that of the traction rope. A rib is provided at the center of the scraper, and pressure rods are provided on both sides of the surface of the rib. The pressure rods pass through the partition plate to the power source section. A telescopic spring is provided between the pressure rods and the partition plate. A cylinder is provided above the pressure rods, and the piston rod at the end of the cylinder is controlled to push the pressure rods downward in a vertical direction. A traction rope is connected to the bottom of the scraper. When the scraper moves downward in a vertical direction, the sealing plate is pushed away from the inlet pipe stepped opening by the compression spring force, and seawater enters the first sampling bucket through the inlet pipe for collection.

[0015] Furthermore, filter barrels are provided on both sides of the surface of the rib plate, and the filter barrels adsorb sand and gravel impurities in the seawater in the water storage section.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this marine monitoring sampling device that samples multiple times at different depths, the connecting shaft is driven to rotate by controlling the output shaft of the motor. The extension rod at the top of the connecting shaft rotates. When the extension rod rotates, the cleaning hook on its surface scrapes the surface of the upper isolation shell. Since the cleaning hook is at a 15° angle to the surface of the upper isolation shell, it can quickly remove the seaweed adhering to the surface of the upper isolation shell, avoid the water inlet being blocked, and ensure the efficiency of seawater collection.

[0017] 2. By controlling the piston rod at the end of the cylinder, the pressure rod moves vertically downward. During the movement of the pressure rod, the telescopic spring is compressed, causing the rib plate to drive the scraper to scrape along the inner wall of the water storage section, preventing seawater impurities from adhering to the inner wall of the storage section. At this time, as the scraper moves vertically downward, the tension on the traction rope connected to the bottom of the scraper gradually disappears, thereby moving the sealing plate away from the stepped opening of the water inlet pipe, allowing the first sampling bucket to automatically collect seawater. When the collection is completed, the piston rod at the end of the cylinder is reset. At this time, the pressure on the pressure rod disappears, and the pressure rod is reset by the force of the telescopic spring. During the reset process of the telescopic spring, the scraper moves vertically upward. At this time, the traction rope fixed to the bottom of the scraper is stretched, causing the sealing plate to move inside the water inlet pipe to seal the stepped opening. Each time the device is opened and closed, it can scrape the inner wall of the water storage section of the first sampling bucket, so that the microorganisms adhering to the inner wall are mixed with the seawater, ensuring the authenticity of the test data.

[0018] 3. The main gear drives the secondary gear rod to mesh and rotate. The fan blades at the bottom of the secondary gear rod disturb the seawater collected in the first sampling bucket, increasing the probability of sand and gravel impurities in the seawater coming into contact with the filter bucket. This accelerates the adsorption and cleaning of sand and gravel impurities in the seawater, avoids affecting subsequent sampling samples, and improves the accuracy of sampling. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the sampling component structure of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram at point A; Figure 4 This is a schematic diagram of the first sampling bucket structure of the present invention; Figure 5 This is a schematic diagram of the impurity removal component structure of the present invention; Figure 6 This is a cross-sectional view of the first sampling bucket of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram at point B; Figure 8 This is a schematic diagram of the inclined plate structure of the present invention; Figure 9 This is a cross-sectional view of the sealing assembly of the present invention; Figure 10 This is a schematic diagram of the wall scraping assembly structure of the present invention.

[0021] The meanings of the labels in the diagram are as follows: 1. Support frame; 11. Winch assembly; 12. Rope; 2. Sampling assembly; 21. First sampling bucket; 22. Second sampling bucket; 23. Upper isolation shell; 24. Lower isolation shell; 25. Ear plate; 26. Inclined plate; 27. Divider plate; 3. Impurity removal assembly; 31. Motor; 32. Connecting shaft; 33. Main gear; 34. Extension rod; 35. Fixing rod; 36. Rotating rod; 37. Cleaning hook; 38. Torsion spring; 39. Secondary gear rod; 40. Fan blade; 4. Sealing assembly; 41. Water inlet pipe; 42. Perforated base plate; 43. Sealing plate; 44. Compression spring; 45. Traction rope; 46. Fixed pulley; 5. Scraper assembly; 51. Scraper; 52. Rib; 53. Pressure rod; 54. Telescopic spring; 55. Cylinder; 56. Filter canister. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] A sampling device for ocean monitoring with multiple sampling at different depths, based on Figure 1-10 As shown, the system includes a support frame 1, with a winch assembly 11 at one end and a rope 12 at the other end. The length of the rope 12 is adjusted by the winch assembly 11. A sampling assembly 2 is connected to the free end of the rope 12 away from the winch assembly 11. The sampling assembly 2 includes a first sampling bucket 21 and a second sampling bucket 22. The first sampling bucket 21 and the second sampling bucket 22 have identical structures and are fixed together by bolts. An upper isolation shell 23 and a lower isolation shell 24 are respectively provided on the exterior of the first sampling bucket 21 and the second sampling bucket 22. An ear plate 25 is provided on the exterior of the upper isolation shell 23 and is fixed to the end of the rope 12. The first sampling bucket 21... The sample container 21 is equipped with a partition plate 27, which divides the interior of the first sampling container 21 into a water storage section and a power source section. The power source section is equipped with a debris removal component 3, which is used to scrape the surface of the upper isolation shell 23 to dislodge seaweed and other foreign objects attached to the surface of the upper isolation shell 23. The water storage section of the first sampling container 21 is equipped with a sealing component 4, which seals the seawater collected into the first sampling container 21. The water storage section is equipped with a wall scraping component 5, which controls the opening and closing of the sealing component 4 and scrapes the inner wall of the water storage section to mix the microorganisms attached to the inner wall with the seawater.

[0024] When seawater fluctuates, the water flow directly impacts the isolation shell and sampling container, generating a significant impact force that can cause instability and sampling position deviation. Therefore, the upper isolation shell 23 is equipped with ramp plates 26 near its bottom. These ramp plates 26 are arranged in a circular array. Their inclined surfaces disperse the impact force of the water flow, reducing overall device sway and preventing sampling position deviation due to instability. This ensures that samples are collected from the target water layer, improving the accuracy of seawater sampling data.

[0025] When collecting seawater, seaweed or marine debris can easily clog the inlet, affecting seawater collection. Therefore, the impurity removal component 3 includes a motor 31 located in the power source. The output shaft of the motor 31 has a connecting shaft 32, and the surface of the connecting shaft 32 has a main gear 33. The top of the connecting shaft 32 has an extension rod 34, which is threadedly connected to the connecting shaft 32. When the output shaft of the motor 31 drives the connecting shaft 32 to rotate, the connecting shaft 32 drives the extension rod 34 to rotate coaxially. The end of the extension rod 34 has a fixing rod 35, and the surface of the fixing rod 35 has a rotating rod 36. The surface of the rotating rod 36 has cleaning hooks 37, which are arranged in an array along the surface of the rotating rod 36. The surface of the extension rod 34 has a torsion spring 38, and the two ends of the torsion spring 38 are fixed to the ends of the extension rod 34 and the rotating rod 36, respectively. The cleaning hooks 37 on the surface of the rotating rod 36 are subjected to the force of the torsion spring 38 and the upper isolation shell 2. The surface of the sampler is at a 15° angle. When collecting seawater, the winch assembly 11 drives the rope 12 to move in the seawater. The winch assembly 11 is equipped with a sensor to obtain the length of the rope 12. When it reaches the specified depth, the winch assembly 11 stops moving, allowing the sampler to reach the specified position for sampling. The output shaft of the control motor 31 drives the connecting shaft 32 to rotate. The extension rod 34 at the top of the connecting shaft 32 rotates. When the extension rod 34 rotates, the cleaning hook 37 on its surface scrapes the surface of the upper isolation shell 23. Since the cleaning hook 37 is at a 15° angle to the surface of the upper isolation shell 23, it can quickly remove the seaweed attached to the surface of the upper isolation shell 23, avoiding blockage of the inlet and ensuring seawater collection efficiency. At the same time, the rotation of the extension rod 34 disturbs the seawater near the sampling component 2, preventing fish from directly impacting the sampling component 2 and improving the service life of the sampling component 2.

[0026] During seawater collection, to facilitate control of the opening and closing of the inlet pipe 41, the sealing assembly 4 includes an inlet pipe 41 located in the water storage section. The inlet pipe 41 is annular and stepped, with the opening on the side near the water storage section smaller than the opening on the side away from the water storage section. A perforated bottom plate 42 is located inside the inlet pipe 41 near the water storage section, and a sealing plate 43 is located inside the inlet pipe 41 away from the water storage section. A compression spring 44 is located between the perforated bottom plate 42 and the sealing plate 43. The diameter of the sealing plate 43 is larger than the opening channel at the step of the inlet pipe 41. Under normal circumstances, the sealing plate 43 is moved away from the step opening channel of the inlet pipe 41 by the force of the compression spring 44, allowing seawater to enter the first sampling bucket 21 for collection through the inlet pipe 41. A traction rope 45 is located at the center of the end of the sealing plate 43, and a fixed pulley 46 is located at the end of the perforated bottom plate 42. By stretching the traction rope 45, the sealing plate 43 is moved along the inner wall of the inlet pipe 41 to the step. The opening of the ladder is sealed. When the traction rope 45 moves, it adheres to the bottom of the fixed pulley 46. Under normal circumstances, the sealing plate 43 is moved away from the opening of the water inlet pipe 41 by the force of the compression spring 44. Therefore, seawater can enter the first sampling bucket 21 through the water inlet pipe 41 for sampling and collection. When the sampling is completed, the traction rope 45 at the end of the sealing plate 43 is stretched. The traction rope 45 moves to the bottom of the fixed pulley 46. During the movement of the traction rope 45, the sealing plate 43 moves inside the water inlet pipe 41 and compresses the compression spring 44 until the sealing plate 43 moves to the opening of the water inlet pipe 41 to seal it. An annular groove is opened on the back of the water inlet pipe 41, and a rubber pad is provided in the annular groove to improve the sealing effect of the water inlet pipe 41. By controlling the sealing plate 43 to adhere to or move away from the opening of the water inlet pipe 41, it is easy to quickly control the collection and sealing of seawater by the first sampling bucket 21, thereby improving the seawater sampling efficiency.

[0027] Considering that sand and gravel particles may enter the first sampling container 21, affecting the measurement of physical properties such as turbidity and density, and thus impacting the judgment of seawater transparency during subsequent seawater monitoring operations, the scraping assembly 5 includes a scraper 51 located inside the water storage section. The scraper 51 has a through groove in one quadrant, with a diameter twice that of the traction rope 45. A rib 52 is located at the center of the scraper 51, and pressure rods 53 are located on both sides of the rib 52. The pressure rods 53 penetrate the partition plate 27 to the power source section. The pressure rods 53 and the partition plate 27... A telescopic spring 54 is provided between the partitions 27. A cylinder 55 is provided above the pressure rod 53. The piston rod at the end of the control cylinder 55 pushes the pressure rod 53 to move downward in the vertical direction. A traction rope 45 is connected to the bottom of the scraper 51. When the scraper 51 moves downward in the vertical direction, the sealing plate 43 is pushed away from the stepped opening of the water inlet pipe 41 by the force of the compression spring 44. Seawater enters the first sampling bucket 21 through the water inlet pipe 41 for collection. When the seawater collection is completed, during the seawater sampling process, the piston rod at the end of the control cylinder 55 drives the pressure rod. 53 moves downwards vertically. During the movement of the pressure rod 53, it compresses the telescopic spring 54, causing the rib plate 52 to drive the scraper 51 to scrape along the inner wall of the water storage section, preventing seawater impurities from adhering to the inner wall of the storage section. At this time, as the scraper 51 moves downwards vertically, the tension on the traction rope 45 connected to the bottom of the scraper 51 gradually disappears, thereby moving the sealing plate 43 away from the stepped opening of the water inlet pipe 41, allowing the first sampling bucket 21 to automatically collect seawater. When the collection is completed, the piston rod at the end of the control cylinder 55 resets, and the pressure rod 53 is then subjected to pressure. When the force disappears, the pressure rod 53 is reset by the force of the telescopic spring 54. During the reset process, the telescopic spring 54 drives the scraper 51 to move upward in the vertical direction. At this time, the traction rope 45 fixed at the bottom of the scraper 51 is stretched, causing the sealing plate 43 to move inside the water inlet pipe 41 to seal the stepped opening. When the first sampling bucket 21 has finished collecting, the control winch assembly 11 continues to move down to the set depth. The second sampling bucket 22 is used in the same way to collect seawater, which facilitates the collection of seawater at different depths and improves the efficiency of seawater stratification sampling.

[0028] When seawater enters the first sampling bucket 21 through the inlet pipe 41, in order to accelerate the adsorption and removal of sand and gravel particles in the seawater, a secondary gear rod 39 is provided on both sides of the main gear 33. The secondary gear rod 39 passes through the partition plate 27 to the water storage section. A fan blade 40 is provided at the bottom of the secondary gear rod 39. The fan blade 40 is arranged at different heights. Filter buckets 56 are provided on both sides of the surface of the rib plate 52. The filter buckets 56 adsorb sand and gravel impurities in the seawater in the water storage section. During the seawater collection process, the secondary gear rod 39 is driven to mesh and rotate by the main gear 33. The fan blades 40 at the bottom of the secondary gear rod 39 disturb the seawater entering the second sampling bucket 22, increasing the probability of sand and gravel impurities in the seawater contacting the filter bucket 56, thereby accelerating the adsorption and removal of impurities in the seawater, avoiding affecting subsequent sampling samples, and improving the accuracy of sampling.

[0029] In practical use, the length of the rope 12 is adjusted by controlling the winch assembly 11, so that the sampling component 2 fixed at the free end of the rope 12 can move to the corresponding seawater depth for sampling. When collecting seawater, the winch assembly 11 is controlled to move the rope 12 in the seawater. The winch assembly 11 is equipped with a sensor to obtain the length of the rope 12. When the specified depth is reached, the winch assembly 11 is controlled to stop moving, so that the sampling component 2 can reach the specified position for sampling. The output shaft of the motor 31 is controlled to drive the connecting shaft 32 to rotate. The extension rod 34 at the top of the connecting shaft 32 rotates. When the extension rod 34 rotates, the cleaning hook 37 on its surface scrapes the surface of the upper isolation shell 23. Since the cleaning hook 37 is at a 15° angle to the surface of the upper isolation shell 23, it can quickly remove the seaweed attached to the surface of the upper isolation shell 23, avoid the water inlet being blocked, and ensure the efficiency of seawater collection. At the same time, the seawater near the sampling component 2 is disturbed by the rotation of the extension rod 34, which prevents fish from directly hitting the sampling component 2 and improves the service life of the sampling component 2. During seawater sampling, the piston rod at the end of the control cylinder 55 drives the pressure rod 53 to move downwards vertically. During this movement, the pressure rod 53 compresses the telescopic spring 54, causing the rib plate 52 to drive the scraper 51 to scrape along the inner wall of the water storage section, preventing seawater impurities from adhering to the inner wall. As the scraper 51 moves downwards vertically, the tension on the traction rope 45 connected to the bottom of the scraper 51 gradually disappears, causing the sealing plate 43 to move away from the stepped opening of the inlet pipe 41, allowing the first sampling bucket 21 to automatically collect seawater. When the collection is complete, the piston rod at the end of the control cylinder 55... When the stopper rod is reset, the pressure on the pressure rod 53 disappears, and the pressure rod 53 is reset by the force of the telescopic spring 54. During the reset process, the telescopic spring 54 drives the scraper 51 to move upward in the vertical direction. At this time, the traction rope 45 fixed at the bottom of the scraper 51 is stretched, causing the sealing plate 43 to move inside the water inlet pipe 41 to seal the stepped opening. When the first sampling bucket 21 has finished collecting, the control winch assembly 11 continues to move down to the set depth. The second sampling bucket 22 is used to collect seawater in the same way, which facilitates the collection of seawater at different depths and improves the efficiency of seawater stratification sampling. During the seawater collection process, the main gear 33 drives the secondary gear rod 39 to mesh and rotate. The fan blades 40 at the bottom of the secondary gear rod 39 agitate the seawater collected in the first sampling bucket 21, increasing the probability of sand and gravel impurities in the seawater coming into contact with the filter bucket 56, thereby accelerating the adsorption and cleaning of sand and gravel impurities in the seawater, avoiding affecting subsequent sampling samples, and improving the sampling accuracy. After sampling is completed, the winch assembly 11 is controlled to wind up the rope 12, so that the sampling assembly 2 fixed at the bottom of the rope 12 is away from the ocean. The first sampling bucket 21 and the second sampling bucket 22 are removed by disassembly and sent to the seawater inspection station for testing.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marine monitoring sampling device for multiple sampling at different depths, characterized in that: The system includes a support frame (1), with a winch assembly (11) at one end and a rope (12) at the other end. The rope (12) is adjusted by the winch assembly (11). A sampling assembly (2) is connected to the free end of the rope (12) away from the winch assembly (11). The sampling assembly (2) includes a first sampling bucket (21) and a second sampling bucket (22). The first sampling bucket (21) and the second sampling bucket (22) have the same structure and are fixed by bolts. The first sampling bucket (21) and the second sampling bucket (22) are respectively provided with an upper isolation shell (23) and a lower isolation shell (24). The upper isolation shell (23) is provided with an ear plate (25), which is fixed to the end of the rope (12). 25) Fixed to the end of the rope (12), the first sampling bucket (21) is provided with a partition plate (27), which divides the inside of the first sampling bucket (21) into a water storage part and a power source part. The power source part is provided with a cleaning component (3), which is used to scrape the surface of the upper isolation shell (23) so that the seaweed foreign objects attached to the surface of the upper isolation shell (23) fall off. The water storage part of the first sampling bucket (21) is provided with a sealing component (4), which seals the seawater collected into the first sampling bucket (21) through the sealing component (4). The water storage part is provided with a wall scraping component (5), which is used to control the opening and closing of the sealing component (4) and scrape the inner wall of the water storage part so that the microorganisms attached to the inner wall are mixed in the seawater.

2. The marine monitoring sampling device for multiple sampling at different depths according to claim 1, characterized in that, The upper isolation shell (23) is provided with a ramp plate (26) near the bottom, and the ramp plate (26) is arranged in a ring array.

3. A marine monitoring sampling device for multiple sampling at different depths according to claim 1, characterized in that, The impurity removal component (3) includes a motor (31) located in the power source section. The output shaft of the motor (31) is provided with a connecting shaft (32). The surface of the connecting shaft (32) is provided with a main gear (33). The top of the connecting shaft (32) is provided with an extension rod (34). The extension rod (34) is threadedly connected and fixed to the connecting shaft (32).

4. A marine monitoring sampling device for multiple sampling at different depths according to claim 3, characterized in that, The extension rod (34) has a fixed rod (35) at its end. The fixed rod (35) has a rotating rod (36) on its surface. The rotating rod (36) has a cleaning hook (37) on its surface. The cleaning hooks (37) are arranged in an array along the surface of the rotating rod (36). The extension rod (34) has a torsion spring (38) on its surface. The two ends of the torsion spring (38) are fixed to the ends of the extension rod (34) and the rotating rod (36) respectively. The cleaning hooks (37) on the surface of the rotating rod (36) are subjected to the force of the torsion spring (38) and form a 15° angle with the surface of the upper isolation shell (23).

5. A marine monitoring sampling device for multiple sampling at different depths according to claim 3, characterized in that, The main gear (33) is provided with auxiliary gear rods (39) on both sides. The auxiliary gear rods (39) pass through the partition plate (27) to the water storage part. The bottom of the auxiliary gear rods (39) is provided with fan blades (40), which are arranged at different heights.

6. A marine monitoring sampling device for multiple sampling at different depths according to claim 1, characterized in that, The sealing assembly (4) includes a water inlet pipe (41) located in the water storage section. The water inlet pipe (41) is annular and stepped, with the opening on the side closer to the water storage section being smaller than the opening on the side farther from the water storage section.

7. A marine monitoring sampling device for multiple sampling at different depths according to claim 6, characterized in that, The inlet pipe (41) has a perforated bottom plate (42) on the side near the water storage section and a sealing plate (43) on the side away from the water storage section. A compression spring (44) is provided between the perforated bottom plate (42) and the sealing plate (43). The diameter of the sealing plate (43) is larger than the opening channel at the step of the inlet pipe (41). Under normal circumstances, the sealing plate (43) is moved away from the opening channel of the step of the inlet pipe (41) by the force of the compression spring (44), and seawater can enter the first sampling bucket (21) through the inlet pipe (41) for collection.

8. A marine monitoring sampling device for multiple sampling at different depths according to claim 7, characterized in that, The sealing plate (43) is provided with a traction rope (45) at the center of its end, and a fixed pulley (46) is provided at the end of the hollow bottom plate (42). By stretching the traction rope (45), the sealing plate (43) is moved along the inner wall of the water inlet pipe (41) to the stepped opening for sealing. When the traction rope (45) moves, it fits against the bottom of the fixed pulley (46).

9. A marine monitoring sampling device for multiple sampling at different depths according to claim 1, characterized in that, The scraping assembly (5) includes a scraper (51) located inside the water storage section. A through groove is provided in the quadrant of the scraper (51), and the diameter of the through groove is twice that of the traction rope (45). A rib (52) is provided at the center of the scraper (51). Pressure rods (53) are provided on both sides of the surface of the rib (52). The pressure rods (53) pass through the partition plate (27) to the power source section. A telescopic spring (54) is provided between the pressure rod (53) and the partition plate (27). A cylinder (55) is provided above the pressure rod (53). The piston rod at the end of the control cylinder (55) pushes the pressure rod (53) to move downward in the vertical direction. A traction rope (45) is connected to the bottom of the scraper (51). When the scraper (51) moves downward in the vertical direction, the sealing plate (43) is pushed away from the stepped opening of the water inlet pipe (41) by the force of the compression spring (44). Seawater enters the first sampling bucket (21) through the water inlet pipe (41) for collection.

10. A marine monitoring sampling device for multiple sampling at different depths according to claim 9, characterized in that, The rib plate (52) has filter barrels (56) on both sides of its surface, and the filter barrels (56) adsorb sand and gravel impurities in the seawater in the water storage section.

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