Sediment sampling instrument for offshore marine ranching area

Abstract

The invention discloses an offshore marine ranching area sediment sampling instrument, and relates to the technical field of marine ranching sampling, the offshore marine ranching area sediment sampling instrument comprises a mounting floating plate floating in an offshore area, the upper surface of the mounting floating plate is fixedly connected with a winding assembly, and a steel rope is wound on the winding assembly; the lower end of the steel rope is fixedly connected with a collecting box for collecting, and the lower surface of the collecting box is fixedly connected with a fixing plate. According to the offshore marine ranching area sediment sampling instrument, after a collection box is in contact with sediments, a waterproof motor drives a gear to rotate, so that a stirring plate rotates together, the sediments below the collection box are fully stirred, and in the stirring process, the inflow and outflow amount of seawater in the collection box can be adjusted by controlling opening and closing of an electromagnetic valve in a water inlet assembly; the electromagnetic valve is opened at the initial stage of stirring, so that part of seawater carries the stirred sediment particles to enter the collection box, and the electromagnetic valve is closed after the sediment particles are preliminarily precipitated, so that the collection efficiency and the purity of a collected sample are improved.

Description

Technical Field

[0001] This invention relates to the field of marine ranching sampling technology, specifically to a sediment sampler for nearshore marine ranching areas. Background Technology

[0002] Sediments are an important component of the ecosystem in nearshore marine ranching areas. They serve not only as habitats and food sources for marine organisms, but also record important information such as environmental changes, nutrient cycling, and the impact of human activities in the region. Therefore, accurate, efficient, and undisturbed sampling of sediments in nearshore marine ranching areas is of vital importance for studying the ecological environment, biogeochemical processes, fishery resource assessment and management, and environmental monitoring and protection of marine ranches.

[0003] Existing technology 1 (Chinese patent CN220473077U, published on 2024-02-09) discloses a marine ranching sampling device, relating to the field of sampling technology. It includes a fixed plate, an adjustment and control mechanism, and a rotating plate. The adjustment and control mechanism comprises a rotating disk, a rotating rod, a sliding rod, multiple fixed frames, a steering block, and a fixed tube. The bottom outer wall of the rotating disk is rotatably mounted on the fixed plate. One end of the rotating rod is rotatably mounted on the rotating disk. The outer surface of the sliding rod is slidably embedded within the rotating rod. The bottom outer wall of the steering block is fixedly embedded within the sliding rod. The bottom outer walls of the multiple fixed frames are equidistantly fixed to the sliding rod. The outer surface of the fixed tube is slidably embedded within the multiple fixed frames. Through the rotating disk, rotating rod, sliding rod, fixed frames, steering block, and fixed tube, different areas of the marine ranch can be sampled. Sampling can be performed on the central area of ​​the marine ranch, and samples can be collected at different depths, diversifying the sampling targets and improving the accuracy of detection.

[0004] There is also prior art 2 (Chinese patent with announcement number CN106840776B and announcement date of 2019-05-21) a sediment collection and cutting device suitable for marine ranch benthic environment surveys, including a sampling frame, a sampling tube, a net bag, a sample pass holder, and a cutting ring. The sampling frame includes a frame body and a frame cover. The frame body is divided into multiple compartments, and multiple sampling tubes are placed in different compartments. The frame cover has a hook on the right side to hang on the frame body. The net bag is located on one side of the frame body, and a rubber stopper is placed in the net bag. After the sampling tube has completed sampling, both ends are plugged with rubber stoppers. The sample pass holder has a top plate at the top. When cutting the sample, the rubber stopper at the bottom of the sampling tube is removed and placed on the top plate of the sample pass holder. Then, the rubber stopper at the top of the sampling tube is removed and the sampling tube is slowly lowered. The sample is exposed from the top of the sampling tube and cut by the cutting ring. Multiple columnar samples can be obtained in the same small area at the bottom of the marine ranch. When cutting, the sample can be quickly passed out and divided into two equal parts for different measurements, ensuring the consistency of the measurement background.

[0005] While existing technologies can perform sampling operations, their agitation and collection efficiency may be insufficient for the complex sediment environment of nearshore marine ranching areas, making it difficult to quickly and effectively obtain sufficient and representative sediment samples. Existing sampling devices also have shortcomings in cleaning sediments attached to agitation components. After long-term use, sediment accumulation on agitation components may affect their subsequent agitation effect and service life.

[0006] Therefore, we propose a sediment sampling instrument for nearshore marine ranching areas to address the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a sediment sampling instrument for nearshore marine ranching areas, in order to solve the problems mentioned in the background art. Currently available market instruments may not be efficient enough in agitation and collection for the complex sediment environment of nearshore marine ranching areas, making it difficult to quickly and effectively obtain sufficient and representative sediment samples. Existing sampling devices also have shortcomings in cleaning sediments attached to agitation components. After long-term use, sediment accumulation on agitation components may affect their subsequent agitation effect and service life.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a sediment sampler for nearshore marine ranching areas, comprising an installation float floating in the nearshore area, a winding assembly fixedly connected to the upper surface of the installation float, and a steel rope wound on the winding assembly. A collection box for collection operations is fixedly connected to the lower end of the steel rope. A fixing plate is fixedly connected to the lower surface of the collection box, and a fixing shaft is fixedly connected between the inner sides of two sets of corresponding fixing plates. A stirring mechanism is provided between the two sets of fixing plates. The stirring mechanism agitates the sediment by changing the position of its included stirring plates, thereby improving the sediment collection efficiency. A cleaning mechanism is also provided between the fixing shaft and the stirring mechanism. The cleaning mechanism cleans the sediment on the stirring plates by changing the position of its included movable plates. A stabilizing float is slidably connected above the collection box, and a stabilizing mechanism is provided between the inner side of the stabilizing float and the collection box. The stabilizing mechanism adjusts the position of the collection box by changing the position of the stabilizing float.

[0009] Preferably, the agitation mechanism includes a waterproof motor, which is fixedly connected to the outside of the fixed plate, and a gear is fixedly connected to the output end of the waterproof motor. A rotating barrel is rotatably connected between the two sets of fixed plates, and the gear is located inside the rotating barrel.

[0010] Preferably, a gear ring is fixedly connected inside the rotating barrel, and the gear ring meshes with the gear. An agitator plate is fixedly connected to the outside of the rotating barrel, and the rotating barrel rotates along the fixed plate through the meshing action of the gear ring and the gear. A water inlet assembly is provided below the collection box, and the water inlet assembly is controlled to open and close by an internal solenoid valve to adjust the inflow and outflow of seawater during the collection process.

[0011] Preferably, the cleaning mechanism includes a groove formed inside the fixed shaft, and a cleaning plate is slidably connected inside the groove. An adjusting spring is fixedly connected to one side of the cleaning plate, and the other end of the adjusting spring is fixedly connected to the inner wall of the groove.

[0012] Preferably, the fixed shaft is fixedly connected to both sides with abutment blocks, and both sides of the abutment blocks are arranged in an inclined structure, and the abutment blocks are located above the fixed shaft.

[0013] Preferably, a movable plate is fixedly connected to the side of the cleaning plate, and the movable plate is disposed through the rotating barrel. The lower end of the movable plate is arranged in an arc shape. The movable plate is positioned opposite to the contact block, and the movable plate can contact the contact block when the rotating barrel rotates, so as to push the cleaning plate to slide upward along the slide groove and clean the surface of the stirring plate.

[0014] Preferably, the stabilizing mechanism includes a drive float slidably connected inside the sampling box. The drive float moves upward along the sampling box under the buoyancy of the sampled water. A fixing sleeve is fixedly connected to the upper surface of the drive float, and a twisted rod is threadedly connected inside the fixing sleeve. A turntable is fixedly connected to the upper end of the twisted rod.

[0015] Preferably, the upper surface of the turntable is fixedly connected to the inner wall above the collection box, a first rotating rod is rotatably connected to the side of the turntable, and a second rotating rod is rotatably connected to the other end of the first rotating rod.

[0016] Preferably, the other end of the second rotating rod is rotatably connected to the lower surface of the stabilizing float. In the initial state, the stabilizing float is in an open state, which increases the lateral force-bearing area of ​​the collection box in the water and improves the stability of the collection box during sinking and collection.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) Adjust the collection box to the designated sampling depth in the nearshore marine ranch area by using the winding assembly. At this time, the stabilizing float remains open under the buoyancy of the water. The stabilizing float increases the lateral force area of ​​the collection box in the water by the support of the first and second rotating rods, effectively offsetting the shaking caused by the water flow impact, and ensuring that the collection box sinks stably to the sediment surface.

[0018] (2) When the collection box comes into contact with the sediment, start the waterproof motor. The waterproof motor drives the gear to rotate. The rotation of the gear will drive the rotating barrel to rotate, so that the stirring plate will rotate together to fully stir the sediment below the collection box. During the stirring process, the amount of seawater entering and leaving the collection box can be adjusted by controlling the opening and closing of the solenoid valve inside the water inlet component. In the early stage of stirring, open the solenoid valve so that some seawater carries the stirred sediment particles into the collection box. After the sediment particles have initially settled, close the solenoid valve to improve the collection efficiency and the purity of the collected sample.

[0019] (3) While the rotating barrel drives the stirring plate to rotate, the movable plate installed through the rotating barrel also rotates. When the movable plate rotates to contact the abutting blocks on both sides of the fixed shaft, the movable plate will be subjected to the squeezing force of the abutting blocks, which will drive the cleaning plate to slide upward and scrape and clean the deposits attached to the stirring plate, preventing the deposits from accumulating on the stirring plate and affecting the subsequent stirring effect.

[0020] (4) During the entire sampling process, the driving float moves upward under the buoyancy of the sampled water body, and the fixed sleeve generates an upward thrust on the twist rod. The upward trend of the driving float causes the turntable to be subjected to a stable torque, and then the first and second rotating rods apply an inward contraction force to the stabilizing float, so that the stabilizing float gradually tightens, reduces the lateral force area of ​​the sampling box in the water, reduces the water resistance during the rising process, and ensures the overall stable recovery of the sampler. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the acquisition box of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the three-dimensional structure of the stirring plate of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the three-dimensional structure of the fixed shaft of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the toothed ring of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the driving float of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the turntable of the present invention.

[0022] In the diagram: 1. Installed float; 2. Rewinding assembly; 3. Steel rope; 4. Collection box; 5. Stabilizing float; 6. Fixing plate; 7. Waterproof motor; 8. Fixing shaft; 9. Rotating bucket; 10. Gear ring; 11. Gear; 12. Agitator plate; 13. Water inlet assembly; 14. Slide chute; 15. Adjusting spring; 16. Cleaning plate; 17. Contact block; 18. Movable plate; 19. Drive float; 20. Fixing sleeve; 21. Twisted rod; 22. Turntable; 23. First rotating rod; 24. Second rotating rod. Detailed Implementation

[0023] 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.

[0024] Example 1: To improve the stability of the sampling box 4 in the water during the sampling process and to prevent the sampling box 4 from shifting or flipping due to water flow fluctuations, such as... Figures 1-5 The technical solution shown in the invention provides the following: A sediment sampling instrument for nearshore marine ranching areas, comprising a floating installation board 1 that floats in the nearshore area, with a winding assembly 2 fixedly connected to the upper surface of the installation board 1, and a steel rope 3 wound on the winding assembly 2. A collection box 4 for collection operations is fixedly connected to the lower end of the steel rope 3, and a fixing plate 6 is fixedly connected to the lower surface of the collection box 4. A fixing shaft 8 is fixedly connected between the inner sides of two sets of corresponding fixing plates 6. A stirring mechanism is provided between the two sets of fixing plates 6. The stirring mechanism agitates the sediment by changing the position of its included stirring plates 12, thereby improving the sediment collection efficiency. The agitation mechanism includes a waterproof motor 7, which is fixedly connected to the outside of the fixed plate 6. A gear 11 is fixedly connected to the output end of the waterproof motor 7. A rotating barrel 9 is rotatably connected between the two fixed plates 6. The gear 11 is located inside the rotating barrel 9. A gear ring 10 is fixedly connected inside the rotating barrel 9, and the gear ring 10 and the gear 11 mesh with each other. An agitation plate 12 is fixedly connected to the outside of the rotating barrel 9. The rotating barrel 9 rotates along the fixed plate 6 through the meshing action of the gear ring 10 and the gear 11. A water inlet assembly 13 is provided below the collection box 4. The water inlet assembly 13 is controlled to open and close by an internal solenoid valve to realize the inflow and outflow of seawater during the collection process.

[0025] The collection box 4 is adjusted to the designated sampling depth in the nearshore marine ranch area using the winding assembly 2. At this time, the stabilizing float 5 is initially open. With the support of the first rotating rod 23 and the second rotating rod 24, the stabilizing float 5 increases the lateral force-bearing area of ​​the collection box 4 in the water, effectively counteracting the shaking caused by the water flow impact, and ensuring that the collection box 4 sinks stably to the sediment surface. After the collection box 4 contacts the sediment, the waterproof motor 7 is started. The waterproof motor 7 drives the gear 11 to rotate. Since the gear 11 meshes with the gear ring 10 inside the rotating barrel 9, the rotation of the gear 11 will drive the rotating barrel 9 to rotate along the fixed plate 6. The stirring plate 12 fixed on the outside of the rotating barrel 9 will rotate accordingly, fully agitating the sediment below the collection box 4, breaking up the hardened or lumpy sediment, which is convenient for subsequent efficient collection. During this process, the solenoid valve inside the water inlet assembly 13 controls the opening and closing according to the collection requirements. When it is necessary to introduce seawater to assist in the suspension of sediment, the solenoid valve opens to allow seawater to enter the collection box 4. After the sediment and seawater are mixed evenly, the solenoid valve is closed to form a stable sediment water sample.

[0026] Example 2: To address the problem that deposits easily adhere to the surface of the stirring plate 12 during the stirring process, leading to a decrease in stirring efficiency, such as... Figures 3-7 The present invention provides the following technical solution: a sediment sampling instrument for nearshore marine ranching areas, wherein a cleaning mechanism is provided between the fixed shaft 8 and the agitation mechanism. The cleaning mechanism cleans the sediments on the agitation plate 12 by changing the position of the movable plate 18 it contains. The cleaning mechanism includes a chute 14 opened inside the fixed shaft 8, and a cleaning plate 16 is slidably connected inside the chute 14. An adjusting spring 15 is fixedly connected to one side of the cleaning plate 16, and the other end of the adjusting spring 15 is fixedly connected to the inner wall of the chute 14. Abutment blocks 17 are fixedly connected to both sides of the fixed shaft 8, and both sides of the abutment blocks 17 are inclined. The abutment blocks 17 are located above the fixed shaft 8. A movable plate 18 is fixedly connected to the side of the cleaning plate 16, and the movable plate 18 is installed through the rotating barrel 9. The lower end of the movable plate 18 is arc-shaped. The movable plate 18 is positioned opposite to the abutment blocks 17. When the movable plate 18 rotates with the rotating barrel 9, it can contact the abutment blocks 17 to push the cleaning plate 16 to slide upward along the slide groove 14 and clean the surface of the stirring plate 12.

[0027] As the rotating drum 9 drives the stirring plate 12 to continuously rotate and agitate the sediment, the movable plate 18, which runs through the rotating drum 9, also performs a circular motion simultaneously. When the movable plate 18 rotates with the rotating drum 9 to the position of the contact blocks 17 on both sides of the fixed shaft 8, since both sides of the contact blocks 17 are inclined, and the lower end of the movable plate 18 is designed with an arc shape that matches the inclined surface of the contact blocks 17, the arc-shaped lower end of the movable plate 18 will first contact the inclined surface of the lower side of the contact blocks 17. As the rotating drum 9 continues to rotate... As the movable plate 18 rotates, guided and squeezed by the inclined surface of the contact block 17, it tends to move upward. Since the movable plate 18 is fixedly connected to the cleaning plate 16, and the cleaning plate 16 is slidably connected in the groove 14 inside the fixed shaft 8, the upward movement of the movable plate 18 will cause the cleaning plate 16 to overcome the elastic tension of the adjusting spring 15 and slide upward along the trajectory of the groove 14. During the upward sliding process of the cleaning plate 16, its edge facing the agitator plate 12 will make close contact with the surface of the agitator plate 12, and... The sediments adhering to the agitator plate 12 are scraped and cleaned to remove mud, sand, organic debris, and other impurities that adhere to the agitator plate 12 during agitation. This prevents these impurities from accumulating on the agitator plate 12, increasing rotational resistance, or affecting the subsequent effective agitation of the sediments. When the movable plate 18 rotates with the rotating barrel 9 past the highest point of the contact block 17, the movable plate 18 is no longer subjected to the squeezing action of the contact block 17. At this time, the compressed adjusting spring 15 begins to recover its deformation, generating a downward pulling force that pulls the cleaning plate 16 along... As the sliding groove 14 slides downwards, the movable plate 18 also slides downwards and resets within the through hole of the rotating barrel 9 until the cleaning plate 16 returns to the initial position of the sliding groove 14. When the rotating barrel 9 drives the movable plate 18 to the position of the contact block 17, the cleaning action is triggered again. Through such a cycle, the cleaning mechanism can clean the agitator plate 12 at least once in each rotation cycle, thereby achieving continuous cleaning of the surface of the agitator plate 12 and ensuring that the agitator plate 12 always maintains good agitation performance.

[0028] Example 3: To reduce the water resistance of the collection box 4 during its ascent after sampling, and to ensure stable and efficient recovery of the entire sampler, as follows: Figure 8 and Figure 9The present invention provides the following technical solution: a sediment sampling instrument for nearshore marine ranching areas, wherein a stabilizing float 5 is slidably connected above the sampling box 4, and a stabilizing mechanism is provided between the inner side of the stabilizing float 5 and the sampling box 4. The stabilizing mechanism achieves stable adjustment of the position of the sampling box 4 by changing the position of the stabilizing float 5. The stabilizing mechanism includes a driving float 19 slidably connected inside the sampling box 4. The driving float 19 moves upward along the sampling box 4 under the buoyancy of the sampled water. A fixing sleeve 2 is fixedly connected to the upper surface of the driving float 19. 0, and the internal thread of the fixed sleeve 20 is connected to a twisted rod 21, and the upper end of the twisted rod 21 is fixedly connected to a turntable 22. The upper surface of the turntable 22 is fixedly connected to the inner wall above the collection box 4. The side of the turntable 22 is rotatably connected to a first rotating rod 23, and the other end of the first rotating rod 23 is rotatably connected to a second rotating rod 24. The other end of the second rotating rod 24 is rotatably connected to the lower surface of the stabilizing float 5. In the initial state, the stabilizing float 5 is in an open state, which increases the lateral force-bearing area of ​​the collection box 4 in the water and improves the stability of the collection box 4 during sinking and collection.

[0029] Throughout the sampling process, the driving float 19 is constantly subjected to the buoyancy of the sampled water, which causes it to tend to move upward. The fixed sleeve 20, fixedly connected to the upper surface of the driving float 19, then exerts an upward thrust on the spiral rod 21. Since the spiral rod 21 and the fixed sleeve 20 are connected by a thread, and the upper end of the spiral rod 21 is fixedly connected to the upper inner wall of the collection box 4 via the turntable 22, this threaded connection transforms the upward linear motion of the fixed sleeve 20 into a rotational motion tendency of the spiral rod 21. This, in turn, causes the turntable 22 to be subjected to a stable torque. A first rotating rod 23 is rotatably connected to the side of the turntable 22, and the other end of the first rotating rod 23 is rotatably connected to a second rotating rod 24. The other end of the second rotating rod 24 is connected to the lower surface of the stabilizing float 5. The rotating connection of the turntable 22 allows the torque of the turntable 22 to apply an inward contraction force to the stabilizing float 5 through the transmission of the first rotating rod 23 and the second rotating rod 24. As the sampling process progresses and the subsequent retrieval stage proceeds, this inward contraction force gradually overcomes part of the buoyancy and water flow resistance experienced by the stabilizing float 5 in the water, causing the stabilizing float 5 to gradually tighten inward around its connection point with the sampling box 4. This effectively reduces the lateral force-bearing area of ​​the sampling box 4 in the water. The reduction in the lateral force-bearing area directly leads to a significant reduction in water resistance during the ascent of the sampler, reducing energy consumption. At the same time, it avoids problems such as unstable sampler posture or swaying of the steel cable 3 that may be caused by excessive water resistance, ensuring that the sampler as a whole can be stably and efficiently retrieved from the sampling depth to the water surface.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sediment sampler for nearshore marine ranching areas, comprising a floating installation buoy (1) floating in the nearshore area, wherein a winding assembly (2) is fixedly connected to the upper surface of the installation buoy (1), and a steel rope (3) is wound around the winding assembly (2), wherein a collection box (4) for collecting samples is fixedly connected to the lower end of the steel rope (3), characterized in that, A fixed plate (6) is fixedly connected to the lower surface of the collection box (4), and a fixed shaft (8) is fixedly connected between the inner sides of the two sets of fixed plates (6) at corresponding positions. A stirring mechanism is provided between the two sets of fixed plates (6). The stirring mechanism achieves the stirring treatment of sediment by changing the position of the stirring plate (12) it contains, thereby improving the collection efficiency of sediment. A cleaning mechanism is also provided between the fixed shaft (8) and the stirring mechanism. The cleaning mechanism achieves the cleaning of auxiliary sediment on the stirring plate (12) by changing the position of the movable plate (18) it contains. A stabilizing float (5) is slidably connected to the upper part of the collection box (4), and a stabilizing mechanism is provided between the inner side of the stabilizing float (5) and the collection box (4). The stabilizing mechanism achieves the stable adjustment of the position of the collection box (4) by changing the position of the stabilizing float (5).

2. The sediment sampler for nearshore marine ranching areas according to claim 1, characterized in that: The stirring mechanism includes a waterproof motor (7), which is fixedly connected to the outside of the fixed plate (6), and a gear (11) is fixedly connected to the output end of the waterproof motor (7). A rotating barrel (9) is rotatably connected between the two sets of fixed plates (6), and the gear (11) is located inside the rotating barrel (9).

3. A sediment sampler for nearshore marine ranching areas according to claim 2, characterized in that: The rotating barrel (9) is fixedly connected to a gear ring (10), and the gear ring (10) meshes with the gear (11). The rotating barrel (9) is fixedly connected to a stirring plate (12), and the rotating barrel (9) rotates along the fixed plate (6) through the meshing action of the gear ring (10) and the gear (11). A water inlet assembly (13) is provided below the collection box (4), and the water inlet assembly (13) is controlled to open and close by an internal solenoid valve to realize the adjustment of seawater inflow and outflow during the collection process.

4. A sediment sampler for nearshore marine ranching areas according to claim 3, characterized in that: The cleaning mechanism includes a groove (14) opened inside the fixed shaft (8), and a cleaning plate (16) is slidably connected inside the groove (14). An adjusting spring (15) is fixedly connected to one side of the cleaning plate (16), and the other end of the adjusting spring (15) is fixedly connected to the inner wall of the groove (14).

5. A sediment sampler for nearshore marine ranching areas according to claim 4, characterized in that: The fixed shaft (8) is fixedly connected to two sides with abutment blocks (17), and both sides of the abutment blocks (17) are arranged in an inclined structure, and the abutment blocks (17) are located above the fixed shaft (8).

6. A sediment sampler for nearshore marine ranching areas according to claim 5, characterized in that: The cleaning plate (16) is fixedly connected to a movable plate (18) on its side, and the movable plate (18) is installed through the rotating barrel (9). The lower end of the movable plate (18) is arranged in an arc shape. The movable plate (18) is positioned opposite to the contact block (17). When the movable plate (18) rotates with the rotating barrel (9), it can contact the contact block (17) to push the cleaning plate (16) to slide upward along the slide groove (14) and clean the surface of the stirring plate (12).

7. A sediment sampler for nearshore marine ranching areas according to claim 1, characterized in that: The stabilizing mechanism includes a drive float (19) slidably connected inside the sampling box (4). The drive float (19) moves upward along the sampling box (4) under the buoyancy of the sampled water. A fixing sleeve (20) is fixedly connected to the upper surface of the drive float (19), and a twisted rod (21) is threaded inside the fixing sleeve (20). A turntable (22) is fixedly connected to the upper end of the twisted rod (21).

8. A sediment sampler for nearshore marine ranching areas according to claim 7, characterized in that: The upper surface of the turntable (22) is fixedly connected to the inner wall above the collection box (4). The side of the turntable (22) is rotatably connected to a first rotating rod (23), and the other end of the first rotating rod (23) is rotatably connected to a second rotating rod (24).

9. A sediment sampler for nearshore marine ranching areas according to claim 8, characterized in that: The other end of the second rotating rod (24) is rotatably connected to the lower surface of the stabilizing float (5). In the initial state, the stabilizing float (5) is in the open state, which increases the lateral force-bearing area of ​​the collection box (4) in the water and improves the stability of the collection box (4) during sinking and collection.

Images