A marine plankton investigation stratified sampler

Abstract

The application discloses a marine plankton investigation layered sampler, which comprises a working plate, a collecting box and a connecting column, the connecting column is connected with the output end of a lifting device outside, and the inside of the working plate is connected with a fixing plate; the sampler further comprises a horizontal rod, which is fixedly installed on the inner wall of the collecting box and is fixedly connected with the surface of the vertical plate on the other side of the horizontal rod. When the fixing plate and the collecting box are installed, the collecting box and the fixing plate are inserted into the working plate, after the lower surface of the fixing plate contacts with the upper surface of the working plate, the clamping block and the clamping groove are in the same horizontal direction, at this time, the clamping block enters into the clamping groove under the mutual magnetic force of the first magnet and the second magnet, at this time, the fixing plate forms a clamping structure with the working plate through the clamping block and the clamping groove, namely, the fixing plate is installed on the working plate, and the operation process is simple and fast.

Description

Technical Field

[0001] This invention relates to the field of marine plankton sampling technology, specifically to a marine plankton survey stratification sampler. Background Technology

[0002] Marine plankton refers to marine organisms that move with the water flow. They can transfer the energy of photosynthesis from the surface of the sea to the bottom. Studying marine plankton can provide a good understanding of water quality and facilitate researchers in formulating research strategies. Marine plankton samplers are required when studying marine plankton.

[0003] For example, a novel planktonic sampler with publication number CN109085017A, belonging to the field of marine exploration and development, includes an upper cover plate, frame, first wall, rotating door, shock-absorbing casters, second wall, third wall, fourth wall, biological storage tank, pressure plate, pressurizing motor, temperature control device, rotating motor, and lower cover plate. It utilizes circuitry to control the light transmittance of the first, second, third, and fourth walls and the rotating door, thereby controlling the dimness of light illuminating the biological sample and preventing damage due to changes in the light environment. After sampling, the circuitry controls the light transmittance of the first, second, third, and fourth walls and the rotating door, facilitating early observation and long-term research. The four temperature control devices have temperature measurement and control functions, allowing the measurement of the ambient temperature at the sampling location and maintaining the sample storage temperature during subsequent operations based on the measured temperature, preventing damage to the biological sample due to changes in ambient temperature.

[0004] For example, a deep-sea thermally insulated biological sampler with publication number CN109959525A includes: a thermally insulated cylinder, which is open at both ends and can be opened or closed by an end cap; a semiconductor cooling component, which has a cooling function when powered on, is also open at both ends and connected to the thermally insulated cylinder to form a sealable sampling chamber; a temperature sensor, which is arranged in the sampling chamber to collect the temperature in the sampling chamber and feed it back to the controller; a controller, which adjusts the current through the semiconductor cooling component according to the temperature change in the sampling chamber to adjust the cooling power of the semiconductor cooling component; and a power supply, which supplies power to the semiconductor cooling component, the temperature sensor, and the controller. The deep-sea thermally insulated biological sampler of this invention uses a semiconductor cooling chip to actively cool the sample, preventing the sample temperature from rising with the increase of seawater temperature during the recovery process.

[0005] The device described in the above application is inconvenient to install and disassemble quickly during use. After the staff takes a sample, they may need to carry special disassembly and assembly tools to remove the device, which reduces the staff's work efficiency. At the same time, the device described in the above application does not have a self-locking structure after sampling, which may lead to sample leakage and cause unnecessary trouble in the sampling process.

[0006] To address the aforementioned issues, there is an urgent need for innovative design based on the existing hierarchical sampler. Summary of the Invention

[0007] The purpose of this invention is to provide a stratified sampler for marine plankton surveys, which solves the problems mentioned in the background art, such as the inconvenience of quick docking and disassembly during use, the need for workers to carry special disassembly and assembly tools when removing the device after sampling, which reduces the work efficiency of workers, and the lack of a self-locking structure after sampling, which may lead to sample leakage and cause unnecessary trouble in the sampling process.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a marine plankton survey stratified sampler, comprising a working plate and a collection box, wherein a connecting column is fixedly installed on the upper surface of the working plate, and the connecting column is connected to the output end of an external lifting device, and a fixing plate is engaged with the inside of the working plate, and the top view of the working plate is circular;

[0009] The collection box is fixedly installed on the lower surface of the fixing plate, and the surface of the collection box is provided with a water inlet, and the fixing plate is distributed at equal angles on the surface of the working plate;

[0010] A marine plankton survey stratification sampler also includes:

[0011] A partition is fixedly installed on the inner wall of the collection box, and the partitions are symmetrically distributed about the center of the collection box. Vertical plates are fixedly installed on the lower surface of both the partition and the lower surface of the fixing plate.

[0012] The card block is slidably connected inside the fixed plate, and the surface of the card block is in contact with the inner wall of the fixed plate, and the fixed plate has a structure that is wider at the top and narrower at the bottom;

[0013] A limiting plate is fixedly installed on the inner wall of the collection box, and a ball is rotatably connected to the inner wall of the limiting plate. A connecting rod is slidably connected inside the limiting plate, and a float plate is fixedly installed on the lower surface of the connecting rod.

[0014] A connecting shaft is rotatably connected inside the collection box, and a baffle is fixedly installed on the surface of the connecting shaft. The surface of the collection box is provided with a water inlet corresponding to the baffle, and a handle is fixedly installed on the surface of the baffle.

[0015] A crossbar is fixedly installed on the inner wall of the collection box, and the other side of the crossbar is fixedly connected to the surface of the vertical plate. A sliding plate is sleeved on the surface of the crossbar.

[0016] Preferably, the working plate has slots inside that correspond one-to-one with the card blocks, and a first magnet is fixedly installed on the inner wall of the working plate. A second magnet corresponding to the first magnet is fixedly installed at the end of the card block. When installing the fixing plate and the collection box, the collection box and the fixing plate are inserted into the working plate. After the lower surface of the fixing plate contacts the upper surface of the working plate, the card blocks and the slots are in the same horizontal direction.

[0017] Preferably, the magnetic poles of the first magnet and the second magnet are opposite at adjacent positions. A first spring that plays an elastic reset role is fixedly installed on the side of the card block, and the other side of the first spring is fixedly connected to the inner wall of the fixing plate. When the card block and the card slot are in the same horizontal direction, the card block enters the card slot under the mutual magnetic attraction of the first magnet and the second magnet. At this time, the fixing plate forms a locking structure with the working plate through the card block and the card slot, that is, the fixing plate has been installed on the working plate. The operation process is simple and quick.

[0018] Preferably, a traction rope is fixedly connected to the side of the card block, and a connecting ball is fixedly connected to the end of the traction rope. When it is necessary to remove the fixing plate, the connecting ball and the traction rope can be pulled first. At this time, the traction rope drives the card block to move out of the slot, so that the fixing plate and the working plate are no longer in a locked state. At this time, the fixing plate and the collection box can be taken out from the inside of the working plate. No additional tools are needed during the disassembly and assembly process, which improves work efficiency.

[0019] Preferably, the surface of the connecting rod is in contact with the surface of the ball, and the cross section of the connecting rod is considered to be an inverted "L" structure. A positioning block is fixedly installed at the end of the connecting rod. During operation, the working plate and the fixed plate are placed into the seawater by an external lifting device. At this time, the seawater enters the collection box, and the float rises under the buoyancy of the water. The float drives the connecting rod to rise synchronously.

[0020] Preferably, the sliding plate is viewed in cross section as an "L" structure, and the upper surface of the sliding plate is provided with a positioning groove corresponding to the positioning block. The side of the sliding plate is fixedly installed with a fixing block corresponding to the baffle. Initially, the positioning block is located inside the positioning groove. At this time, the sliding plate is stably stopped on the crossbar through the positioning block and the positioning groove. When the float plate drives the connecting rod to rise, the connecting rod drives the positioning block to move out of the positioning groove.

[0021] Preferably, a second spring that provides elastic reset is fixedly installed on the side of the sliding plate, and the other side of the second spring is fixedly connected to the surface of the vertical plate. Initially, the second spring is in a compressed state. After the positioning block moves out of the positioning groove, the sliding plate, under the action of the second spring, drives the fixed block to move towards the baffle.

[0022] Preferably, the sliding plate is internally connected with ball bearings, the surface of which is in contact with the surface of the crossbar, and the upper surface of the crossbar is convex. A connecting block is fixedly installed on the side of the connecting rod. The ball bearings make the sliding plate move more smoothly, and the connecting block determines the lowest position of the connecting rod.

[0023] Preferably, a counterweight is fixedly installed on the part of the connecting shaft located inside the collection box, and a groove corresponding to the counterweight is opened inside the collection box. The rotation angle of the counterweight is 0° to 70°. Initially, the connecting shaft and the baffle are tilted towards the inside of the collection box under the action of the counterweight. When the sliding plate drives the fixed block to move, the fixed block will push the baffle and the connecting shaft to rotate. When the connecting shaft rotates, it drives the counterweight to slide inside the groove.

[0024] Preferably, the collection box has a sliding connection to a limiting block inside, with the end of the limiting block located on the outside of the collection box. A third spring, which provides elastic reset, is fixedly installed on the lower surface of the limiting block, and the other side of the third spring is fixedly connected to the inner wall of the collection box. When the baffle rotates to contact the limiting block, the baffle is in a vertical state, and the water inlet is closed, preventing seawater leakage. Then, the external lifting device is controlled to remove the working plate, the fixing plate, and the collection box from the seawater. When it is necessary to remove the sample, the limiting block is pressed to prevent its side from contacting the baffle. The baffle then continues to rotate under the action of the fixing block, opening the water inlet and facilitating the removal of the sample by the staff. The operation is simple and quick. The third spring is then compressed, and after the limiting block is released, it returns to its original position under the action of the third spring.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: This marine plankton survey stratified sampler adopts a novel structural design, the specific details of which are as follows:

[0026] (1) When installing the fixed plate and the collection box, the collection box and the fixed plate are inserted into the working plate. After the lower surface of the fixed plate contacts the upper surface of the working plate, the locking block and the locking slot are in the same horizontal direction. At this time, the locking block enters into the locking slot under the mutual attraction of the first magnet and the second magnet. At this time, the fixed plate forms a locking structure with the working plate through the locking block and the locking slot, that is, the fixed plate has been installed on the working plate. The operation process is simple and quick.

[0027] (2) When the marine plankton survey stratified sampler is working, the working plate and the fixed plate are placed into the seawater by an external lifting device. At this time, the seawater enters the collection box and the float rises under the buoyancy of the water. The float drives the connecting rod and the positioning block to rise synchronously. At this time, the sliding plate and the fixed block push the baffle to rotate under the action of the second spring. When the baffle rotates to contact the limiting block, the baffle is in a vertical state. At this time, the water inlet is closed and there will be no sample leakage.

[0028] (3) When the sample needs to be taken out, the limiting block is pressed first so that the side of the limiting block does not contact the baffle (at this time the third spring is squeezed). Then the baffle continues to rotate under the action of the fixing block. At this time, the water inlet is opened, which makes it easy for the staff to take out the sample. The operation process is simple and quick. After the limiting block is released, the limiting block returns to its original position under the action of the third spring. When the baffle needs to be returned to the initial state, the baffle is pushed so that the baffle pushes the fixing block and the sliding plate to move back. When the sliding plate contacts the protrusion of the crossbar, the positioning block and the positioning groove are in the same vertical direction. At this time, the positioning block enters the positioning groove under its own gravity, which is convenient for the next use. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the front sectional view of the present invention;

[0030] Figure 2 This is a top view of the structure of the present invention;

[0031] Figure 3 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0032] Figure 4 This is a schematic diagram of the connection structure between the connecting shaft and the baffle of the present invention;

[0033] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B;

[0034] Figure 6 This is a schematic diagram of the initial state structure of the counterweight block of the present invention;

[0035] Figure 7 This is a schematic diagram of the vertical baffle structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the three-dimensional structure of the sliding plate of the present invention;

[0037] Figure 9 This is a partial front sectional view of the working state of the fixing block of the present invention.

[0038] In the diagram: 1. Working plate; 2. Fixing plate; 3. Collection box; 4. Connecting column; 5. Partition; 6. Slot; 7. First magnet; 8. Locking block; 9. Second magnet; 10. Traction rope; 11. Connecting ball; 12. First spring; 13. Inlet; 14. Vertical plate; 15. Limiting plate; 16. Float; 17. Rolling ball; 18. Connecting rod; 19. Positioning block; 20. Sliding plate; 21. Positioning groove; 22. Second spring; 23. Fixing block; 24. Connecting shaft; 25. Baffle; 26. Handle; 27. Crossbar; 28. Ball bearing; 29. ​​Counterweight; 30. Slide groove; 31. Limiting block; 32. Third spring; 33. Connecting block. Detailed Implementation

[0039] 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.

[0040] Please see Figures 1-9 The present invention provides a technical solution: a marine plankton survey stratified sampler, comprising a working plate 1 and a collection box 3. A connecting column 4 is fixedly installed on the upper surface of the working plate 1, and the connecting column 4 is connected to the output end of an external lifting device. A fixing plate 2 is engaged and connected inside the working plate 1. The working plate 1 is circular in plan view. The collection box 3 is fixedly installed on the lower surface of the fixing plate 2, and the surface of the collection box 3 is provided with a water inlet 13. The fixing plates 2 are evenly distributed on the surface of the working plate 1.

[0041] A marine plankton survey stratification sampler also includes:

[0042] The partition 5 is fixedly installed on the inner wall of the collection box 3, and the partition 5 is symmetrically distributed about the center of the collection box 3. The lower surface of the partition 5 and the lower surface of the fixed plate 2 are both fixedly installed with vertical plates 14 and locking blocks 8. The locking blocks 8 are slidably connected to the inside of the fixed plate 2, and the surface of the locking blocks 8 is in contact with the inner wall of the fixed plate 2. The fixed plate 2 has a structure that is wider at the top and narrower at the bottom.

[0043] Limiting plate 15 is fixedly installed on the inner wall of collection box 3, and a ball 17 is rotatably connected to the inner wall of limiting plate 15. A connecting rod 18 is slidably connected inside the limiting plate 15, and a float plate 16 is fixedly installed on the lower surface of the connecting rod 18.

[0044] A connecting shaft 24 is rotatably connected inside the collection box 3, and a baffle 25 is fixedly installed on the surface of the connecting shaft 24. A water inlet 13 corresponding to the baffle 25 is opened on the surface of the collection box 3, and a handle 26 is fixedly installed on the surface of the baffle 25.

[0045] A crossbar 27 is fixedly installed on the inner wall of the collection box 3, and the other side of the crossbar 27 is fixedly connected to the surface of the vertical plate 14. A sliding plate 20 is sleeved on the surface of the crossbar 27. The working plate 1 has slots 6 that correspond one-to-one with the card blocks 8. A first magnet 7 is fixedly installed on the inner wall of the working plate 1, and a second magnet 9 corresponding to the first magnet 7 is fixedly installed at the end of the card block 8.

[0046] The magnetic poles of the first magnet 7 and the second magnet 9 are opposite at adjacent positions. A first spring 12 that plays an elastic reset role is fixedly installed on the side of the locking block 8, and the other side of the first spring 12 is fixedly connected to the inner wall of the fixing plate 2. A traction rope 10 is fixedly connected to the side of the locking block 8, and a connecting ball 11 is fixedly connected to the end of the traction rope 10.

[0047] When installing the fixing plate 2 and the collection box 3, insert the collection box 3 and the fixing plate 2 into the working plate 1. After the lower surface of the fixing plate 2 contacts the upper surface of the working plate 1, the locking block 8 and the locking slot 6 are in the same horizontal direction. Then, under the mutual magnetic attraction of the first magnet 7 and the second magnet 9, the locking block 8 enters the locking slot 6. At this time, the fixing plate 2 forms a locking structure with the working plate 1 through the locking block 8 and the locking slot 6, that is, the fixing plate 2 has been installed on the working plate 1. The operation process is simple and quick. When it is necessary to remove the fixing plate 2, the connecting ball 11 and the traction rope 10 can be pulled first. At this time, the traction rope 10 drives the locking block 8 to move out of the locking slot 6, and the fixing plate 2 and the working plate 1 are no longer in a locking state. At this time, the fixing plate 2 and the collection box 3 can be taken out from the inside of the working plate 1. No additional tools are needed during the disassembly and assembly process, which improves work efficiency.

[0048] The surface of the connecting rod 18 is in contact with the surface of the ball 17, and the cross section of the connecting rod 18 is considered to be an inverted "L" structure. A positioning block 19 is fixedly installed at the end of the connecting rod 18. The cross section of the sliding plate 20 is considered to be an "L" structure. A positioning groove 21 corresponding to the positioning block 19 is opened on the upper surface of the sliding plate 20, and a fixing block 23 corresponding to the baffle 25 is fixedly installed on the side of the sliding plate 20.

[0049] A second spring 22, which plays an elastic restoring role, is fixedly installed on the side of the sliding plate 20, and the other side of the second spring 22 is fixedly connected to the surface of the vertical plate 14. The second spring 22 is initially in a compressed state.

[0050] The sliding plate 20 is rotatably connected to a ball bearing 28, and the surface of the ball bearing 28 is in contact with the surface of the crossbar 27. The upper surface of the crossbar 27 is raised. A connecting block 33 is fixedly installed on the side of the connecting rod 18. A counterweight 29 is fixedly installed on the part of the connecting shaft 24 located inside the collection box 3. The collection box 3 has a groove 30 corresponding to the counterweight 29 inside. The rotation angle of the counterweight 29 is 0° to 70°.

[0051] Initially, the positioning block 19 is located inside the positioning groove 21. The sliding plate 20 is stably positioned on the crossbar 27 via the positioning block 19 and the positioning groove 21, while the baffle 25 is in an inclined state. At this time, the water inlet 13 is in an open state. During operation, the working plate 1 and the fixed plate 2 are placed into the seawater using an external lifting device. At this time, the seawater enters the collection box 3, and the float 16 rises under the buoyancy of the water. The float 16 drives the connecting rod 18 and the positioning block 19 to rise synchronously. After the positioning block 19 moves out of the positioning groove 21, the sliding plate 20 is in a second... Under the action of spring 22, the fixed block 23 is driven to move towards the baffle 25, and the ball bearing 28 makes the sliding plate 20 move more smoothly. At this time, the fixed block 23 will push the baffle 25 and the connecting shaft 24 to rotate (when the connecting shaft 24 rotates, it drives the counterweight 29 to slide inside the slide groove 30). When the baffle 25 rotates to contact the limit block 31, the baffle 25 is in a vertical state. At this time, the water inlet 13 is in a closed state, and seawater leakage will not occur. Then, control the external lifting device to remove the working plate 1, the fixed plate 2, and the collection box 3 from the seawater.

[0052] The collection box 3 has a sliding connection of a limiting block 31 inside, and the end of the limiting block 31 is located on the outside of the collection box 3. A third spring 32 that plays an elastic reset role is fixedly installed on the lower surface of the limiting block 31, and the other side of the third spring 32 is fixedly connected to the inner wall of the collection box 3.

[0053] When it is necessary to remove the sample, first press the limiting block 31 so that the side of the limiting block 31 does not contact the baffle 25 (at this time, the third spring 32 is squeezed). Then, the baffle 25 continues to rotate under the action of the fixing block 23. At this time, the water inlet 13 opens, making it easier for the staff to remove the sample. The operation process is simple and quick. After releasing the limiting block 31, the limiting block 31 returns to its original position under the action of the third spring 32. When it is necessary to return the baffle 25 to its initial state, push the baffle 25 so that the baffle 25 pushes the fixing block 23 and the sliding plate 20 to move back. When the sliding plate 20 contacts the protruding position of the crossbar 27, the positioning block 19 and the positioning groove 21 are in the same vertical direction. At this time, the positioning block 19 enters the positioning groove 21 under its own gravity, which is convenient for the next use.

[0054] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0055] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] 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 marine plankton survey stratified sampler, comprising a working plate (1) and a collection box (3), wherein a connecting column (4) is fixedly installed on the upper surface of the working plate (1), and the connecting column (4) is connected to the output end of an external lifting device, and a fixing plate (2) is engaged and connected inside the working plate (1), and the top view of the working plate (1) is circular; The collection box (3) is fixedly installed on the lower surface of the fixing plate (2), and the surface of the collection box (3) is provided with a water inlet (13), and the fixing plate (2) is evenly distributed on the surface of the working plate (1); Its features are, Also includes: The partition (5) is fixedly installed on the inner wall of the collection box (3), and the partition (5) is symmetrically distributed about the center of the collection box (3). The lower surface of the partition (5) and the lower surface of the fixing plate (2) are both fixedly installed with vertical plates (14). The card block (8) is slidably connected inside the fixed plate (2), and the surface of the card block (8) is in contact with the inner wall of the fixed plate (2), and the fixed plate (2) has a structure that is wider at the top and narrower at the bottom; Limiting plate (15), the limiting plate (15) is fixedly installed on the inner wall of the collection box (3), and a ball (17) is rotatably connected to the inner wall of the limiting plate (15), and a connecting rod (18) is slidably connected inside the limiting plate (15), and a float plate (16) is fixedly installed on the lower surface of the connecting rod (18). A connecting shaft (24) is rotatably connected inside the collection box (3), and a baffle (25) is fixedly installed on the surface of the connecting shaft (24). The surface of the collection box (3) is provided with a water inlet (13) corresponding to the baffle (25), and a handle (26) is fixedly installed on the surface of the baffle (25). A crossbar (27) is fixedly installed on the inner wall of the collection box (3), and the other side of the crossbar (27) is fixedly connected to the surface of the vertical plate (14), and a sliding plate (20) is sleeved on the surface of the crossbar (27). The surface of the connecting rod (18) is in contact with the surface of the ball (17), and the cross section of the connecting rod (18) is considered as an inverted "L" structure, and a positioning block (19) is fixedly installed at the end of the connecting rod (18). The sliding plate (20) is viewed as an "L" structure in cross section, and the upper surface of the sliding plate (20) is provided with a positioning groove (21) corresponding to the positioning block (19), and a fixing block (23) corresponding to the baffle (25) is fixedly installed on the side of the sliding plate (20). The sliding plate (20) is fixedly mounted with a second spring (22) that plays an elastic reset role, and the other side of the second spring (22) is fixedly connected to the surface of the vertical plate (14), and the second spring (22) is initially in a compressed state. The collection box (3) is internally connected to a limiting block (31), and the end of the limiting block (31) is located on the outside of the collection box (3). A third spring (32) that plays an elastic reset role is fixedly installed on the lower surface of the limiting block (31), and the other side of the third spring (32) is fixedly connected to the inner wall of the collection box (3).

2. The marine plankton survey stratified sampler according to claim 1, characterized in that: The working plate (1) has slots (6) that correspond one-to-one with the card block (8) inside, and a first magnet (7) is fixedly installed on the inner wall of the working plate (1), and a second magnet (9) corresponding to the first magnet (7) is fixedly installed at the end of the card block (8).

3. A stratified sampler for marine plankton survey according to claim 2, characterized in that: The magnetic poles of the first magnet (7) and the second magnet (9) are opposite at adjacent positions. A first spring (12) that plays an elastic reset role is fixedly installed on the side of the card block (8), and the other side of the first spring (12) is fixedly connected to the inner wall of the fixing plate (2).

4. A stratified sampler for marine plankton survey according to claim 1, characterized in that: The side of the card block (8) is fixedly connected to a traction rope (10), and the end of the traction rope (10) is fixedly connected to a connecting ball (11).

5. A stratified sampler for marine plankton survey according to claim 1, characterized in that: The sliding plate (20) is rotatably connected to a ball (28), and the surface of the ball (28) is in contact with the surface of the crossbar (27). The upper surface of the crossbar (27) is convex, and a connecting block (33) is fixedly installed on the side of the connecting rod (18).

6. A stratified sampler for marine plankton survey according to claim 1, characterized in that: The connecting shaft (24) is fixedly installed with a counterweight (29) inside the collection box (3), and the collection box (3) has a groove (30) corresponding to the counterweight (29) inside, and the rotation angle of the counterweight (29) is 0°~70°.

Images