Stepped sea grass bed plankton collecting device

Abstract

The invention relates to the technical field of plankton collection, in particular to a stepped sea grass bed plankton collection device which comprises a shell, a telescopic part, a piston cylinder and a plurality of fixing rods are arranged in the shell, the fixing rods are fixedly connected with the piston cylinder, a cross rod is arranged on an output shaft of the telescopic part, and a first piston plate is arranged on the cross rod; driving rods are arranged on the two sides of the cross rod, U-shaped rods are symmetrically arranged in the shell, the driving rods are hinged to the U-shaped rods, a connecting block is arranged below the piston cylinder, hinge blocks are hinged to the two ends of the connecting block, hinge shafts are hinged to the hinge blocks, the U-shaped rods are fixedly connected with the hinge shafts, and a collecting assembly is arranged at the bottom of the connecting block. The movement stability of the connecting block is ensured through the driving rods, the U-shaped rods, the hinge shafts and the hinge blocks which are symmetrically arranged, so that the connecting block can drive the collecting assembly to stably move up and down in the movement process, and the problem of plankton damage caused by sudden change of the movement speed is reduced.

Description

Technical Field

[0001] This invention relates to the field of plankton collection technology, specifically to a stepped seagrass bed plankton collection device. Background Technology

[0002] The stepped seagrass bed plankton collection device is an intelligent sampling device for plankton monitoring designed specifically for seagrass bed ecosystems. Its core function is to achieve gradient collection of suspended matter in the water through a multi-layered, adjustable collection structure. By adjusting the depth of the collection components or expanding the collection area, it can simultaneously obtain plankton samples from different water layers (such as the surface, middle, and bottom layers).

[0003] Existing technologies, such as the ZPS plankton sampler, involve a screen that is automatically moved to a predetermined position by a drive device. When water passes through the screen, plankton are trapped on the screen surface, thus achieving the sampling of plankton. After sampling, the staff removes the screen and transfers the trapped plankton to a fixative or culture medium for preservation, completing the plankton collection operation.

[0004] Although the above-mentioned sampler can collect plankton, the quality of the collected live samples may be affected by the friction of the sieve during the collection process.

[0005] In summary, the existing sieve collection method may damage live samples, thus affecting the collection quality. This has become a problem that urgently needs to be solved in this field. Therefore, it is necessary to propose a stepped seagrass bed planktonic collection device. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a stepped seagrass bed plankton collection device. The symmetrically arranged drive rod, U-shaped rod hinge shaft, and hinge block ensure the stability of the connecting block's movement, thereby enabling the connecting block to drive the collection component to move stably up and down during movement, reducing the problem of plankton damage caused by sudden changes in movement speed.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a stepped seagrass bed plankton collection device, comprising a controller and a shell, a recovery rope fixedly connected to the top of the shell, and a telescopic component fixedly connected to the inner top wall of the shell, the controller being used to control the extension and retraction of the output shaft of the telescopic component.

[0008] The outer shell contains a piston cylinder, and several fixing rods are fixedly connected to the inner wall of the outer shell. The ends of the fixing rods away from the inner wall of the outer shell are all fixedly connected to the piston cylinder. A cross rod is coaxially fixedly connected to the output shaft of the telescopic component. A first piston plate is hinged to the end of the cross rod away from the output shaft of the telescopic component. The first piston plate is vertically slidingly engaged with the inner wall of the piston cylinder. Drive rods are hinged to both sides of the cross rod. U-shaped rods are symmetrically arranged inside the outer shell. The ends of the drive rods away from the cross rods are hinged to the middle of the adjacent U-shaped rods. A connecting block is provided below the piston cylinder. Hinge blocks are hinged to both ends of the connecting block. A hinge shaft is eccentrically fixedly connected to the side of the hinge block away from the connecting block. A first limiting rod is symmetrically fixedly connected to the inner wall of the outer shell. The end of the hinge shaft away from the hinge block passes through the adjacent first limiting rod and is fixedly connected to the U-shaped rod. A collection component for collecting plankton is provided at the bottom of the connecting block.

[0009] The technical principles of the above solution are as follows:

[0010] The staff deploys the device at the designated location and then controls the retraction of the telescopic output shaft via a controller, causing it to sequentially move the crossbar and the first piston plate upwards. During this process, the crossbar also drives the drive rod upwards, causing it to rotate the U-shaped rod. The U-shaped rod then sequentially rotates the hinge shaft and hinge block, which in turn causes the connecting block to rotate in a circular motion, moving it downwards. This, in turn, moves the collection component downwards, allowing it to enter different depths of the water to collect plankton. During this process, the first limiting rod limits the movement of the hinge shaft.

[0011] After the data collection is completed, the staff uses the controller to extend the output shaft of the telescopic component. At this time, the connecting block moves upward, and the data collection component moves back to its initial position under the drive of the connecting block. The staff can then pull the recovery rope to recover the device.

[0012] The above approach has the following beneficial effects:

[0013] 1. The present invention ensures the motion stability of the connecting block by symmetrically arranged drive rods, U-shaped rods, hinge shafts and hinge blocks, thereby enabling the connecting block to drive the collection component to move stably up and down during the movement, reducing the problem of plankton damage caused by sudden changes in movement speed.

[0014] 2. The multi-point fixing design of the fixing rod in this invention enables the piston cylinder to be stably fixed inside the outer shell, thereby ensuring the stability of the first piston plate during reciprocating motion, reducing the displacement of the first piston plate during operation, and improving the stability of the device.

[0015] 3. The design of the recovery rope in this invention allows workers to easily retrieve the device after completing the plankton collection, improving the device's flexibility and reusability.

[0016] Furthermore, the acquisition component includes several acquisition plates, each with an acquisition cylinder fixedly connected to its side wall, and each acquisition cylinder has a collection frame detachably connected to its bottom. Each acquisition plate has an acquisition rod hinged to its top, and a sleeve is rotatably fitted on the connecting block. One acquisition rod is fixedly connected to the sleeve, and the remaining acquisition rods are hinged to the bottom of their adjacent collection frames. Several solenoid valves are connected to the acquisition cylinder, and the controller is used to control the opening and closing of the solenoid valves.

[0017] Beneficial effects: The detachable design of the collection tube and collection frame allows staff to remove the collection frame directly after collecting plankton into it, and then analyze and process the plankton inside the frame, reducing density deviation caused by plankton transfer.

[0018] Furthermore, it also includes auxiliary acquisition components and transmission components symmetrically arranged on both sides of the connecting block. The transmission component includes an extension rod fixedly connected to the side of the U-shaped rod away from the connecting block, and a second limiting rod symmetrically fixedly connected to the inner wall of the outer shell. The end of the extension rod away from the U-shaped rod passes through the second limiting rod adjacent to it and is coaxially fixedly connected to a first transmission wheel. The inner wall of the outer shell is rotatably fitted with a second transmission wheel. A chain is meshed on the first transmission wheel and meshes with the second transmission wheel.

[0019] Beneficial effects: The synchronous transmission structure consisting of the extension rod, the first transmission wheel, the second transmission wheel, and the chain enables the U-shaped rods on both sides of the connecting block and the auxiliary acquisition components to operate synchronously, reducing structural offset or jamming caused by asynchronous movement, thereby improving the overall stability and reliability of the device.

[0020] Furthermore, the auxiliary acquisition component includes an auxiliary rod that is coaxially and fixedly connected to the second transmission wheel. A fan blade is fixedly connected to the end of the auxiliary rod away from the second transmission wheel. The fan blade and the acquisition cylinder are both arranged perpendicularly in the vertical plane.

[0021] Beneficial effects: Driven by the second drive wheel, the fan blades rotate synchronously with the second drive wheel and the auxiliary rod, which can generate local water flow disturbance around the collection tube, remove impurities on the outer wall of the collection tube, reduce the possibility of impurities entering the collection tube and contaminating the sample, thereby improving the collection quality.

[0022] Furthermore, it also includes a preservation component for preserving the collected plankton. The preservation component includes a liquid storage tank fixedly connected to one side of the outer shell, with a liquid inlet at the top of the liquid storage tank and a detachable rubber stopper at the inlet. The liquid storage tank is filled with a protective liquid. A delivery tube is connected to one side of the liquid storage tank. The end of the delivery tube away from the liquid storage tank extends through the side wall of the outer shell and into the interior of the outer shell, communicating with the interior of the piston cylinder. A one-way valve is connected at the connection between the delivery tube and the piston cylinder, with the flow direction of the one-way valve being unidirectional from the delivery tube to the interior of the piston cylinder. An outlet tube is connected to the side wall of the piston cylinder, with a one-way valve at the connection between the piston cylinder and the outlet tube, with the flow direction of the one-way valve being unidirectional from the interior of the piston cylinder to the outlet tube. A nozzle is fixedly connected to the inner side wall of the outer shell. The end of the outlet tube away from the piston cylinder is connected to the nozzle, and the nozzle side of the nozzle is in contact with the side wall of the collection cylinder.

[0023] Beneficial effects: After collection, the protective solution can be quickly sprayed into the collection tube through the nozzle, which can immediately fix and preserve the collected plankton, reducing the possibility of plankton samples dying, decomposing or escaping due to environmental changes, thereby improving the retention rate of biological activity of the samples and the accuracy of subsequent analysis.

[0024] Furthermore, it also includes a pump assembly for performing protective fluid delivery operations. The pump assembly includes a connecting rod fixedly connected to the sleeve, with a second piston plate hinged to the end of the connecting rod away from the connecting block. The second piston plate slides vertically against the inner wall of the piston cylinder.

[0025] Beneficial effects: When the second piston plate slides inside the piston cylinder, it works in conjunction with the first piston plate, causing them to move closer or further apart. When they move away from each other, a negative pressure is generated inside the piston cylinder, which accelerates the suction of the protective liquid in the storage tank into the piston cylinder. When they move closer together, the first and second piston plates push the protective liquid out of the storage tank and deliver it to the collection cylinder, accelerating its flow rate and ensuring that the sample preservation operation can be completed quickly after collection, thus improving operational efficiency and sample quality.

[0026] Furthermore, it also includes an anti-tipping component for reducing the tipping of the collection tube. The anti-tipping component includes a counterweight block fixedly connected to the bottom of the collection frame, and a guide plate is fixedly connected to the counterweight block circumferentially along its side wall.

[0027] Beneficial effects: By increasing the weight at the bottom of the collection component, the counterweight can effectively lower the overall center of gravity of the collection tube and the collection frame, thereby improving the stability of the collection tube in water and significantly reducing the risk of tilting or overturning caused by water flow disturbance or mechanical movement, ensuring the smooth progress of the collection process; the guide plate can guide the direction of water flow, reduce the direct impact of water flow on the collection tube and the collection frame, thereby reducing the impact of water disturbance on the collection process, and enabling the device to maintain stable operation in complex water flow environments.

[0028] Furthermore, the protective solution is selected from either Lugol's solution or formalin.

[0029] Beneficial effects: Lugol's solution can quickly kill and fix phytoplankton, maintaining their cellular structure; formalin can fix zooplankton, preventing tissue decay and phytoplankton degradation, maintaining the sample morphology and structure, and ensuring the integrity of the phytoplankton sample morphology.

[0030] Furthermore, an airbag is fixedly connected to the top of the outer shell.

[0031] Beneficial effects: The airbags provide additional buoyancy to the entire device, keeping it on the water surface and simplifying the recovery process.

[0032] Furthermore, depth gauges are fixedly connected to each collection frame, and the controller is used to receive depth information collected by the depth gauges in real time, and control the extension and retraction of the output shaft of the telescopic component based on the depth information.

[0033] Beneficial effects: The depth gauge can collect the depth information of the water layer where the collection frame is located in real time, and the controller performs closed-loop feedback control on the output shaft of the telescopic component to ensure that the collection component can sample at the preset water depth position, thereby improving the spatial accuracy and data reliability of the sampling.

[0034] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0035] Figure 1 This is an isometric schematic diagram of the stepped seagrass bed plankton collection device of the present invention.

[0036] Figure 2 This is an isometric schematic diagram of the internal structure of the stepped seagrass bed plankton collection device of the present invention.

[0037] Figure 3 This is a side sectional view of the outer shell of the stepped seagrass bed plankton collection device of the present invention.

[0038] Figure 4 This is a side cross-sectional schematic diagram of the piston cylinder in the stepped seagrass bed plankton collection device of the present invention.

[0039] Figure 5 This is a front view schematic diagram of the U-shaped rod, hinge shaft, hinge block, and connecting block in the stepped seagrass bed plankton collection device of the present invention.

[0040] The reference numerals in the accompanying drawings of the instruction manual include: 1. Outer shell; 2. Retrieval rope; 3. Piston cylinder; 4. Fixing rod; 5. Cross rod; 6. First piston plate; 7. Drive rod; 8. U-shaped rod; 9. Connecting block; 10. Collection cylinder; 11. Collection frame; 12. Solenoid valve; 13. Extension rod; 14. Second limiting rod; 15. First transmission wheel; 16. Second transmission wheel; 17. Auxiliary rod; 18. Fan blade; 19. Storage tank; 20. Infusion tube; 21. Inlet check valve; 22. Outlet tube; 23. Outlet check valve; 24. Nozzle; 25. Connecting rod; 26. Second piston plate; 27. Airbag; 28. Hinge block; 29. ​​Hinge shaft. Detailed Implementation

[0041] The following detailed description illustrates the specific implementation method:

[0042] Example 1:

[0043] As attached Figure 1 As shown: A stepped seagrass bed plankton collection device includes a controller and a housing 1. A recovery rope 2 is bolted to the top of the housing 1; a telescopic component is screwed to the inner top wall of the housing 1. The controller is used to control the extension and retraction of the output shaft of the telescopic component. In this embodiment, the telescopic component is an electric telescopic rod.

[0044] like Figure 2 As shown, a piston cylinder 3 is provided inside the outer casing 1. Several fixing rods 4 are welded on the inner side wall of the outer casing 1. The ends of the fixing rods 4 away from the inner side wall of the outer casing 1 are all welded to the piston cylinder 3. A cross rod 5 is coaxially screwed to the output shaft of the electric telescopic rod. The end of the cross rod 5 away from the output shaft of the electric telescopic rod is hinged to a first piston plate 6. The first piston plate 6 slides vertically with the inner side wall of the piston cylinder 3.

[0045] Both sides of the cross rod 5 are hinged with drive rods 7. U-shaped rods 8 are symmetrically arranged inside the outer shell 1. The end of the drive rod 7 away from the cross rod 5 is hinged to the middle of the adjacent U-shaped rod 8. A connecting block 9 is provided below the piston cylinder 3. Both ends of the connecting block 9 are hinged with hinge blocks 28. The side of the hinge block 28 away from the connecting block 9 is eccentrically formed with a hinge shaft 29. The inner wall of the outer shell 1 is symmetrically welded with a first limiting rod. The end of the hinge shaft 29 away from the hinge block 28 passes through the adjacent first limiting rod and is welded to the U-shaped rod 8. The bottom of the connecting block 9 is provided with a collection component for collecting plankton.

[0046] like Figure 2 and Figure 5As shown, the acquisition component includes several acquisition plates, and each acquisition plate has an integrally formed acquisition cylinder 10 on its side wall. The bottom of each acquisition cylinder 10 is detachably connected to a collection frame 11 by threads. Each collection frame 11 is fixedly connected to a depth gauge (not shown in the figure) by screws. The controller is used to receive the depth information collected by the depth gauge in real time and control the extension and retraction of the output shaft of the electric telescopic rod based on the depth information.

[0047] Each collection plate has a collection rod hinged to its top. A sleeve is rotatably fitted onto the connecting block 9. One collection rod is welded to the sleeve, while the remaining collection rods are hinged to the bottom of their adjacent collection frames 11. Several solenoid valves 12 are connected to the collection cylinder 10, and a controller is used to control the opening and closing of the solenoid valves 12. In this embodiment, the solenoid valves 12 are initially kept open.

[0048] Specifically, the staff sets up the device at a predetermined location, sets the collection height of each collection tube 10 using a controller (the error range for the collection height setting is ±5cm), and then controls the output shaft of the electric telescopic rod to retract, causing it to move the cross rod 5, which is fixed to it with screws, upward. The cross rod 5 then moves the drive rod 7, which is hinged to it, upward. Since the end of the drive rod 7 furthest from the cross rod 5 is hinged to the middle of the U-shaped rod 8, when the drive rod 7 moves upward, causing the U-shaped rod 8 to experience an upward pulling force, the drive rod 7 can swing, and this swinging force causes the U-shaped rod 8 to swing downward. During this swinging process, the U-shaped rod 8 will cause the hinge shaft 29 welded to it to rotate, and through the hinge shaft 29, it will cause the hinge block 28 to rotate, causing the hinge block 28 to drive the connecting block 9, which is hinged to it, to perform a circular motion, moving downward during this circular motion. Figure 2 and Figure 5 As shown.

[0049] As the connecting block 9 moves downwards, it sequentially moves the sleeve, sampling rod, sampling plate, sampling cylinder 10, and collection frame 11 downwards, allowing the sampling cylinder 10 to reach the predetermined sampling depth. During this process, the controller receives the depth signal sent by the depth gauge in real time and controls the extension and retraction of the electric telescopic rod output shaft based on the depth signal to reduce deviations in sampling depth caused by excessive extension and retraction. Specifically, the operator sets a depth threshold through the controller. When the depth signal exceeds the depth threshold, the controller controls the electric telescopic rod output shaft to extend, causing the sampling cylinder 10 and collection frame 11 to move upwards; when the depth signal does not reach the depth threshold, the controller controls the electric telescopic rod output shaft to continuously retract, causing the sampling cylinder 10 and collection frame 11 to continuously move downwards.

[0050] like Figure 2 and Figure 3As shown, it also includes auxiliary acquisition components and transmission components symmetrically arranged on both sides of the connecting block 9. The transmission component includes an extension rod 13 welded to the side of the U-shaped rod 8 away from the connecting block 9. A second limiting rod 14 is symmetrically welded on the inner wall of the outer shell 1. The end of the extension rod 13 away from the U-shaped rod 8 passes through the second limiting rod 14 adjacent to it and is coaxially fixedly engaged with a first transmission wheel 15. A second transmission wheel 16 is rotatably engaged with the inner wall of the outer shell 1. A chain is meshed on the first transmission wheel 15 and meshes with the second transmission wheel 16.

[0051] Specifically, since the extension rod 13 is welded to the U-shaped rod 8, when the U-shaped rod 8 rotates, it can drive the extension rod 13 to rotate, and then drive the first transmission wheel 15, the chain and the second transmission wheel 16 to rotate in sequence through the extension rod 13, so as to achieve stable transmission of driving force.

[0052] like Figure 2 and Figure 3 As shown, the auxiliary acquisition component includes an auxiliary rod 17 that is coaxially and fixedly connected to the second transmission wheel 16. The end of the auxiliary rod 17 away from the second transmission wheel 16 is integrally formed with a fan blade 18. The fan blade 18 and the acquisition cylinder 10 are both arranged perpendicularly in the vertical plane.

[0053] Specifically, since the auxiliary rod 17 is coaxially and fixedly connected to the second transmission wheel 16, when the second transmission wheel 16 rotates, it can drive the auxiliary rod 17 to rotate. At this time, the auxiliary rod 17 will drive the fan blade 18, which is integrally formed with it, to rotate, causing the fan blade 18 to disturb the water and remove impurities on the collection tube 10, reducing the possibility of impurities contaminating the collected sample. In this embodiment, the solenoid valve 12 and the fan blade 18 are located in different vertical planes. During the process of disturbing the water, the fan blade 18 can remove impurities to both sides of the collection tube 10, reducing the possibility of impurities entering the collection tube 10 and contaminating the sample when the collection tube 10 is lowered.

[0054] like Figure 2 and Figure 3 As shown, it also includes a preservation component for preserving the collected plankton. The preservation component includes a liquid storage tank 19 welded to one side of the outer shell 1. The liquid storage tank 19 has a liquid inlet on the top and a rubber stopper that can be detachably engaged at the liquid inlet. The liquid storage tank 19 is filled with a protective liquid, which is either Lugol's solution or formalin. In this embodiment, formalin (concentration of 4%-5%) is used.

[0055] A liquid infusion tube 20 is connected to one side of the liquid storage tank 19. The end of the liquid infusion tube 20 away from the liquid storage tank 19 extends through the side wall of the outer shell 1 and into the interior of the outer shell 1, communicating with the interior of the piston cylinder 3. A liquid inlet check valve 21 is connected at the connection between the liquid infusion tube 20 and the piston cylinder 3. The flow direction of the liquid inlet check valve 21 is one-way from the liquid infusion tube 20 to the interior of the piston cylinder 3. A liquid outlet tube 22 is connected to the side wall of the piston cylinder 3. A liquid outlet check valve 23 is connected at the connection between the piston cylinder 3 and the liquid outlet tube 22. The flow direction of the liquid outlet check valve 23 is one-way from the interior of the piston cylinder 3 to the liquid outlet tube 22. A nozzle 24 is fixedly connected to the inner side wall of the outer shell 1 with screws. The end of the liquid outlet tube 22 away from the piston cylinder 3 is connected to the nozzle 24. The nozzle side of the nozzle 24 is in contact with the side wall of the collection tube 10.

[0056] Specifically, since the two ends of the infusion tube 20 are connected to the piston cylinder 3 and the storage tank 19 respectively, the protective fluid in the storage tank 19 can enter the piston cylinder 3 through the infusion tube 20 and the inlet check valve 21. Furthermore, since the two ends of the outlet tube 22 are connected to the piston cylinder 3 and the nozzle 24 respectively, the protective fluid in the piston cylinder 3 can enter the nozzle 24 through the outlet tube 22 and the outlet check valve 23, and then be sprayed out through the nozzle 24.

[0057] When the protective fluid in the storage tank 19 is insufficient, since the rubber stopper is detachably engaged with the inlet, the operator can remove the rubber stopper and fill the storage tank 19 with protective fluid through the inlet.

[0058] Fifteen minutes after the collection tubes 10 are set up, the controller closes all solenoid valves 12 and simultaneously extends the output shaft of the electric telescopic rod, causing the collection tubes 10 and collection frames 11 to move upwards. The depth at the nozzle 24 is set as the preservation height threshold. When the depth signal sent by the depth gauge reaches the preservation height threshold, the solenoid valve 12 at the top of one of the collection tubes 10 connects to the nozzle of the nozzle 24. The controller then opens the solenoid valve 12 connected to the nozzle, injecting protective fluid (10-20 ml) into the collection tube 10 through the nozzle 24. After injection, the controller closes the solenoid valve 12 and continues to extend the output shaft of the electric telescopic rod, causing the next collection tube 10 to move upwards and repeating the above operation to complete the collection of plankton.

[0059] like Figure 4 As shown, it also includes a pump assembly for performing protective fluid delivery operations. The pump assembly includes a connecting rod 25 integrally formed on the sleeve. A second piston plate 26 is hinged to the end of the connecting rod 25 away from the connecting block 9. The second piston plate 26 slides vertically with the inner wall of 3.

[0060] Specifically, since the connecting rod 25 is integrally formed with the sleeve and hinged to the second piston plate 26, when the connecting block 9 rotates, it can sequentially drive the connecting rod 25 and the second piston plate 26 to move vertically. At this time, since the first piston plate 6 is hinged to the cross rod 5, when the cross rod 5 moves vertically, the first piston plate 6 will move vertically along with it. During this process, when the cross rod 5 moves upward, the connecting block 9 moves downward under the drive of the drive rod 7, U-shaped rod 8, hinge shaft 29, and hinge block 28. As a result, the first piston plate 6 and the second piston plate 26 move away from each other. At this time, the internal volume of the piston cylinder 3 increases, generating negative pressure (the negative pressure value can reach -500Pa to -300Pa, which can quickly draw in the protective liquid). The protective liquid will accelerate into the piston cylinder 3 under the action of negative pressure. When the cross rod 5 moves downward, the connecting block 9 moves upward. At this time, the first piston plate 6 and the second piston plate 26 move closer to each other, squeezing the protective liquid in the piston cylinder 3. This increases the flow rate (the flow rate can reach 5-10m / s) of the protective liquid delivered to the nozzle 24 through the liquid outlet check valve 23 and the liquid outlet pipe 22. This allows the protective liquid to be injected into the collection cylinder 10 more quickly, reducing the injection time of the protective liquid and thus reducing the risk of changes in the properties of the sample when it is not fixed.

[0061] It also includes an anti-tipping component to reduce the tipping of the collection tube 10. The anti-tipping component includes a counterweight (not shown in the figure) integrally formed on the bottom of the collection frame 11. The counterweight (with a mass of 5 kg) has a guide plate (not shown in the figure) welded circumferentially along its side wall.

[0062] Specifically, since the counterweights are all located at the bottom of the collection frame 11, they can keep the collection frame 11 and the collection cylinder 10 vertical in the water under the action of gravity. When the water flow velocity increases, the counterweights can reduce the swaying amplitude of the collection cylinder 10 to a certain extent, thereby reducing the possibility of it overturning (for example, when the water flow velocity is 0.5-1m / s, the swaying amplitude of the collection cylinder 10 can be reduced by 20%-30% under the stabilizing effect of the counterweights, thereby reducing the possibility of it overturning). At the same time, since the counterweights are also welded with guide plates, they can guide the water flow. Therefore, under the guiding effect of the guide plates, the direct impact of the water flow on the collection cylinder 10 is reduced, thereby further reducing the possibility of the collection cylinder 10 overturning.

[0063] The present invention ensures the motion stability of the connecting block 9 by symmetrically arranging the drive rod 7, U-shaped rod 8, hinge shaft 29 and hinge block 28, thereby enabling the connecting block 9 to drive the collection component to move up and down stably during the movement, reducing the problem of plankton damage caused by sudden changes in movement speed.

[0064] Example 2:

[0065] As attached Figure 1As shown, the difference from Embodiment 1 is that an airbag 27 is fixedly adhered to the top of the outer shell 1.

[0066] The specific implementation process is as follows: Airbag 27 can provide buoyancy for the entire device, enabling staff to easily pull the device back from the water surface during recovery, reducing the complexity of the recovery process.

[0067] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A stepped seaweed bed plankton collecting device, comprising a shell (1), a recovery rope (2) is fixedly connected to the top of the shell (1), characterized in that, The controller is used for controlling the extension and retraction of the output shaft of the telescopic member. The shell (1) is internally provided with a piston cylinder (3), and a plurality of fixed rods (4) are fixedly connected to the inner side wall of the shell (1), and the ends of the fixed rods (4) away from the inner side wall of the shell (1) are fixedly connected with the piston cylinder (3); a cross rod (5) is coaxially fixedly connected with the output shaft of the telescopic member, and the end of the cross rod (5) away from the output shaft of the telescopic member is hingedly connected with a first piston plate (6); the first piston plate (6) is vertically slidably connected with the inner side wall of the piston cylinder (3); drive rods (7) are hingedly connected to the two sides of the cross rod (5); U-shaped rods (8) are symmetrically arranged inside the shell (1); the ends of the drive rods (7) away from the cross rod (5) are hingedly connected to the middle portions of the U-shaped rods (8) adjacent thereto; a connecting block (9) is arranged below the piston cylinder (3); hinge blocks (28) are hingedly connected to the two ends of the connecting block (9); hinge shafts (29) are eccentrically fixedly connected to the sides of the hinge blocks (28) away from the connecting block (9); first limiting rods are symmetrically fixedly connected to the inner side wall of the shell (1); the ends of the hinge shafts (29) away from the hinge blocks (28) are fixedly connected with the U-shaped rods (8) and the first limiting rods adjacent thereto; and the bottom of the connecting block (9) is provided with a collecting assembly for collecting plankton.

2. The stepped seaweed bed phytoplankton collection device of claim 1, wherein, The collecting assembly comprises a plurality of collecting plates, collecting cylinders (10) are fixedly connected to the side walls of the collecting plates, and collecting frames (11) are detachably connected to the bottoms of the collecting cylinders (10); collecting rods are hingedly connected to the top portions of the collecting plates; a sleeve is rotatably connected to the connecting block (9); one of the collecting rods is fixedly connected with the sleeve, and the remaining collecting rods are hingedly connected to the bottoms of the collecting frames (11) adjacent thereto; a plurality of electromagnetic valves (12) are connected to the collecting cylinders (10); and the controller is used for controlling the opening and closing of the electromagnetic valves (12).

3. The stepped seaweed bed phytoplankton collection device of claim 2, wherein, The auxiliary collecting assembly and the transmission assembly are symmetrically arranged on the two sides of the connecting block (9); the transmission assembly comprises an extension rod (13) fixedly connected to the side of the U-shaped rod (8) away from the connecting block (9); second limiting rods (14) are symmetrically fixedly connected to the inner side wall of the shell (1); a first transmission wheel (15) is coaxially fixedly connected to the end of the extension rod (13) away from the U-shaped rod (8) and penetrates through the second limiting rod (14) adjacent thereto; a second transmission wheel (16) is rotatably connected to the inner side wall of the shell (1); a chain is meshed with the first transmission wheel (15) and the second transmission wheel (16).

4. The stepped seaweed bed phytoplankton collection device of claim 3, wherein, The auxiliary collecting assembly comprises an auxiliary rod (17) coaxially fixedly connected with the second transmission wheel (16); a fan blade (18) is fixedly connected to the end of the auxiliary rod (17) away from the second transmission wheel (16); and the fan blade (18) and the collecting cylinder (10) are vertically arranged in a vertical plane.

5. The stepped seaweed bed phytoplankton collection device of claim 4, wherein, The preservation assembly for preserving the collected plankton comprises a liquid storage tank (19) fixedly connected to one side of the shell (1), an inlet opening is formed in the top of the liquid storage tank (19), a rubber plug is detachably connected to the inlet opening, and the liquid storage tank (19) is filled with a protective liquid; one side of the liquid storage tank (19) is communicated with a liquid delivery pipe (20), the liquid delivery pipe (20) extends to the inside of the shell (1) and is communicated with the inside of the piston cylinder (3) through the side wall of the shell (1) at the end away from the liquid storage tank (19), a liquid inlet one-way valve (21) is communicated with the communication position of the liquid delivery pipe (20) and the piston cylinder (3), and the flow direction of the liquid inlet one-way valve (21) is one-way from the liquid delivery pipe (20) to the inside of the piston cylinder (3); the side wall of the piston cylinder (3) is communicated with a liquid outlet pipe (22), a liquid outlet one-way valve (23) is communicated with the communication position of the piston cylinder (3) and the liquid outlet pipe (22), and the flow direction of the liquid outlet one-way valve (23) is one-way from the inside of the piston cylinder (3) to the liquid outlet pipe (22); a spray head (24) is fixedly connected to the inner side wall of the shell (1), the end of the liquid outlet pipe (22) away from the piston cylinder (3) is communicated with the spray head (24), and the nozzle side of the spray head (24) is attached to the side wall of the collection cylinder (10).

6. The stepped seaweed bed phytoplankton collection device of claim 5, wherein, The pump liquid assembly for performing the protective liquid delivery operation comprises a connecting rod (25) fixedly connected to the sleeve, and a second piston plate (26) hinged to the end of the connecting rod (25) away from the connecting block (9), and the second piston plate (26) is vertically and slidingly fitted with the inner side wall of the piston cylinder (3).

7. The stepped seaweed bed phytoplankton collection device of claim 6, wherein, The anti-overturning assembly for reducing the overturning phenomenon of the collection cylinder (10) comprises a counterweight fixedly connected to the bottom of the collection frame (11), and the counterweight is fixedly connected with a flow guide plate along the side wall in the circumferential direction.

8. The stepped seaweed bed phytoplankton collection device of claim 7, wherein, The protective liquid is selected from one of Lugol's solution and formalin.

9. The stepped seaweed bed phytoplankton collection device of claim 8, wherein, The gas bag (27) is fixedly connected to the top of the shell (1).

10. The stepped seaweed bed phytoplankton collection device of claim 9, wherein, The depth gauge is fixedly connected to the collection frame (11), the controller is used for receiving the depth information collected by the depth gauge in real time, and the extension and retraction of the output shaft of the telescopic member is controlled based on the depth information.

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