Multi-layer filtering type floating net

Abstract

The utility model relates to the technical field of floating nets, in particular to a multi-layer filter type floating net which comprises a frame, a first filter net and a first handle rod, the first handle rod is in threaded connection with the side wall of the frame, the first filter net is woven on the inner side wall of the frame, and a tripod is fixedly arranged on the inner side wall, close to the first filter net, of the frame. The top end of the tripod is rotatably connected with a paddle, the bottom end of the tripod is fixedly provided with a valve seat, the outer surface of the valve seat is sleeved with a sealing box, the outer surface of the first filter screen is woven with a second filter screen, the bottom end of the second filter screen is woven with a collecting tank, and the bottom end of the collecting tank is provided with a butterfly valve; compared with a traditional multi-layer filtering type floating net, through cooperation of the frame, the triangular support, the first filtering net, the second filtering net and the collecting tank, the stability of water circulation is improved, through cooperation of the paddle and the motor, the water flowing speed can be increased, the filtering efficiency is improved, and through cooperation of the collecting tank, the butterfly valve and the funnel, the filtering efficiency is improved. Therefore, the plankton filtering efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of floating net technology, and in particular to multi-layer filter floating nets. Background Technology

[0002] Multi-layer filter planktonic nets are specialized equipment used to collect plankton of different sizes in water. Through multi-layer filter nets with different mesh sizes, they achieve stratified capture and sample concentration of plankton. They are widely used in marine and freshwater ecological research and aquaculture monitoring.

[0003] Existing multi-layered filter-type planktonic nets typically include a frame, handle, multi-layered grading filters, and a sealed collection device. The coarse filter first filters out large particles such as silt and branches, reducing sample contamination and improving the accuracy of subsequent microscopic examination or molecular analysis. The "grading filtration + directional collection" design makes multi-layered filter-type planktonic nets a core tool for analyzing planktonic community structure and tracking ecological changes in aquatic ecological research.

[0004] Existing multi-layered filter-type planktonic nets require operators to hold a support rod and insert the multi-layered filter and sealed collection device into the water to stir and collect the planktonic organisms. Because the multi-layered filter structure increases the resistance to water flow, the sampling operation is time-consuming and laborious, thus affecting the efficiency of planktonic organism sampling. Utility Model Content

[0005] To overcome the problem that existing multi-layer filter-type planktonic nets require operators to hold a support rod and insert the multi-layer graded filter and sealing collection device into the water to stir and collect the planktonic organisms, which increases the resistance to water flow due to the multi-layer graded filter structure, making the sampling operation time-consuming and laborious, thus affecting the efficiency of planktonic organism sampling.

[0006] The technical solution of this utility model is as follows: a multi-layer filter floating net, including a frame, a first filter screen and a first handle rod. The first handle rod is threaded to the side wall of the frame. The first filter screen is woven on the inner side wall of the frame. A tripod is fixed on the inner side wall of the frame near the first filter screen. A paddle is rotatably connected to the top of the tripod. A valve seat is fixed at the bottom of the tripod. A sealing box is fitted on the outer surface of the valve seat. A second filter screen is woven on the outer surface of the first filter screen. A collection tank is woven at the bottom of the second filter screen. A butterfly valve is installed at the bottom of the collection tank. A funnel is inserted into the bottom of the butterfly valve.

[0007] Furthermore, the output end of the valve seat is fixed in the middle of the blade through the tripod, and the external dimensions of the sealing box are adapted to the internal dimensions of the valve seat. The sealing box is threaded to the bottom of the tripod, which improves the stability of the valve seat installation.

[0008] Furthermore, a first groove is provided at the top of the valve seat, and a sealing ring is engaged inside the first groove. The sealing ring is circular and matches the internal size of the first groove, which improves the sealing performance of the sealing box installation.

[0009] Furthermore, a connecting pipe is inserted into the side wall of the valve seat, and the connecting pipe is connected to the valve seat via a power supply line. The middle of the connecting pipe is filled with sealant to improve the sealing of power transmission.

[0010] Furthermore, a slot is provided on the inner side wall of the frame, and several holes and slots are provided on the side wall of the frame that are connected to the slot. The top of the tripod is woven into the middle of the slot.

[0011] Furthermore, the first filter screen has a double-layer composite structure, with the mesh diameter decreasing sequentially between the first and second filter screens.

[0012] Furthermore, threaded grooves are provided on the side walls of the frame, and the first handle is threadedly connected in the middle of the threaded groove.

[0013] Furthermore, a second handle is fitted onto the end of the first handle, and a pin is threaded onto the side wall of the second handle. Several insertion holes are provided on the side wall of the first handle near the pin for the pin to be inserted, which improves the convenience of adjusting the length of the first handle.

[0014] The beneficial effects of this utility model are:

[0015] Compared to traditional multi-layered floating net filters, this system improves the stability of water flow through the combination of a frame, tripod, first filter, second filter, and collection tank. The combination of paddles and motor accelerates water flow and increases filtration efficiency. The combination of collection tank, butterfly valve, and funnel further enhances the efficiency of plankton filtration. Additionally, the inclusion of a first groove, sealing ring, and connecting pipe improves the sealing of the motor installation. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the overall structure of the multi-layer filter floating net of this utility model.

[0017] Figure 2 The diagram shown is a schematic representation of the structure of the collection tank of this utility model;

[0018] Figure 3 The diagram shown is a schematic representation of the frame structure of this utility model.

[0019] Figure 4 The diagram shown is a schematic representation of the tripod structure of this utility model.

[0020] Figure 5 The diagram shown is a schematic representation of the sealing box structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Tripod; 3. Paddle; 4. First filter screen; 5. Second filter screen; 6. Collection tank; 7. First handle; 8. Second handle; 9. Pin; 10. Insertion hole; 11. Butterfly valve; 12. Funnel; 13. Sealing box; 14. Threaded groove; 15. Slot; 16. Motor; 17. First groove; 18. Sealing ring; 19. Connecting pipe. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Among the currently discovered feasible technologies, the following are described:

[0024] In the vast aquatic ecosystem, plankton, though tiny in size, play a crucial role in ecological balance, material cycling, and energy flow. From the boundless depths of the ocean to the flowing waters of lakes and rivers, plankton are ubiquitous. To study these microorganisms in depth, scientists have developed various sampling tools, among which multi-layered filter planktonic nets are one efficient and important device.

[0025] Multi-layered filter-type planktonic nets are ingeniously designed, with each part working in concert to achieve precise collection of plankton of different sizes. The frame, as the supporting structure of the planktonic net, is usually made of corrosion-resistant, high-strength materials such as stainless steel and PVC. Stainless steel frames, with their excellent corrosion resistance and high strength, can adapt to harsh environments such as the ocean. They remain structurally stable even after long-term immersion in seawater and external impacts, ensuring the normal operation of the filter. PVC frames, on the other hand, have the advantages of being lightweight and low-cost, making them suitable for use in freshwater lakes, rivers, and other environments. They are also convenient for researchers to operate and carry. The shape of the frame is generally circular or rectangular. Circular frames distribute the force evenly and are more stable when moving in water. Rectangular frames can adjust the length and width ratio as needed to adapt to different sampling requirements. For example, a narrow and long rectangular frame can be used in narrower rivers.

[0026] Multi-layered filters are the core component of planktonic nets. They are composed of sieves or other fine filter materials with different mesh sizes. These filters are arranged in layers according to the order of coarse to fine mesh, like a series of checkpoints, to filter plankton of different sizes in stages. For example, the outermost coarse filter can first intercept larger impurities, such as leaves and branches in the water, and at the same time initially filter out large zooplankton, such as some large planktonic crustaceans. As the water flows to the inner layer, the smaller mesh filters successively capture medium and small zooplankton, small phytoplankton, etc.

[0027] The collection device, located at the end of the filter, is used to collect concentrated plankton samples after multiple filtrations. The collection device typically uses a well-sealed container, such as a specially designed plastic bottle or metal collection can. Plastic bottles are lightweight, transparent, and unbreakable, allowing researchers to easily observe the initial condition of the sample after sampling. Metal collection cans offer better corrosion resistance and pressure resistance, making them suitable for sampling in special environments such as the deep sea. The connection between the collection device and the filter is tight and smooth, ensuring that plankton does not leak during sampling and is collected intact for subsequent detailed laboratory analysis.

[0028] When a multi-layered filter-type floating net is put into use, its working process is like an orderly microbial "fishing" operation. Whether it is moved by being dragged in the water or fixed in a certain position, the water flow will carry plankton through the filter continuously.

[0029] Compared to traditional plankton sampling tools, multi-layer filter-type planktonic nets effectively avoid sampling bias caused by improper selection of mesh size in a single filter. If a filter with a single mesh size is used, plankton of certain sizes may be missed, failing to accurately reflect the actual composition and abundance of plankton in the water. Multi-layer filter-type planktonic nets, on the other hand, use filters of different mesh sizes to ensure that all types of plankton are captured, greatly improving the accuracy of sampling results. In natural water bodies, in addition to plankton, there are also a large number of impurities, such as silt, branches, and fragments of aquatic plants. These impurities not only affect the collection of plankton but may also interfere with subsequent sample analysis. The outermost coarse filter of the multi-layer filter-type planktonic net can filter out these larger impurities first, reducing their impact on subsequent fine filtration.

[0030] With the continuous advancement of technology, multi-layer filter floating nets are also constantly developing and innovating. On the one hand, the development of materials science has provided better materials for the production of floating nets. For example, new high-strength, corrosion-resistant and flexible filter materials are constantly emerging. These materials can not only improve the service life of the filter, but also further optimize the filtration effect, making the mesh more uniform and precise, and better adapting to the sampling needs of different environments.

[0031] Please refer to Figures 1-5A multi-layer filter floating screen includes a frame 1, a first filter screen 4, and a first handle 7. The first handle 7 is threaded onto the side wall of the frame 1. The first filter screen 4 is woven into the inner side wall of the frame 1 for preliminary filtration of impurities. A tripod 2 is fixedly mounted on the inner side wall of the frame 1 near the first filter screen 4. A paddle 3 is rotatably connected to the top of the tripod 2. A valve seat 16 is fixedly mounted at the bottom of the tripod 2. A sealing box 13 is fitted onto the outer surface of the valve seat 16. The sealing box 13 is made of stainless steel and is cylindrical for waterproof sealing. The output end of the valve seat 16 passes through the tripod 2 and is fixed in the middle of the paddle 3. The external dimensions of the sealing box 13 are... The sealing box 13 is threaded to the bottom of the tripod 2 to match the internal dimensions of the valve seat 16, which improves the stability of the valve seat 16 installation. Starting the sealing box 13 can drive the paddle 3 to rotate, thereby accelerating the flow of water into the interior of the first filter screen 4. The outer surface of the first filter screen 4 is woven with a second filter screen 5. The first filter screen 4 has a double-layer composite structure. The mesh diameter between the first filter screen 4 and the second filter screen 5 decreases sequentially. The bottom end of the second filter screen 5 is woven with a collection tank 6 to collect the plankton filtered by the first filter screen 4 and the second filter screen 5. A butterfly valve 11 is installed at the bottom end of the collection tank 6, and a funnel 12 is inserted into the bottom end of the butterfly valve 11.

[0032] A first groove 17 is provided at the top of the valve seat 16. A sealing ring 18 is snapped into the inside of the first groove 17. The sealing ring 18 is made of rubber and is circular in shape, which is adapted to the internal size of the first groove 17, thereby improving the sealing performance of the sealing box 13. A connecting pipe 19 is inserted into the side wall of the valve seat 16. The connecting pipe 19 is connected to the valve seat 16 and the power supply line is inserted. The middle of the connecting pipe 19 is filled with sealant to improve the sealing performance of power transmission.

[0033] A threaded groove 14 is provided on the side wall of the frame 1. The first handle 7 is threadedly connected to the middle of the threaded groove 14. The end of the first handle 7 is fitted with a second handle 8. A pin 9 is threadedly connected to the side wall of the second handle 8. Several insertion holes 10 are provided on the side wall of the first handle 7 near the pin 9 for the pin 9 to be inserted, which improves the convenience of adjusting the length of the first handle 7. A slot 15 is provided on the inner side wall of the frame 1. Several holes and slots are provided on the side wall of the frame 1 and are connected to the slot 15. The top of the tripod 2 is woven in the middle of the slot 15.

[0034] When using this multi-layered filter planktonic net, the operator first connects to an external power source and, holding the first handle 7 and the second handle 8, inserts the frame 1, the first filter screen 4, the second filter screen 5, and the collection tank 6 into the water being sampled. Activating the valve seat 16 rotates the paddle 3, accelerating the flow of water into the first filter screen 4 and the second filter screen 5 for filtration. The filtered planktonic rises into the collection tank 6 for collection, reducing the frequency of the operator stirring the first filter screen 4 and the second filter screen 5 in the water and improving the convenience of planktonic collection. After sampling, the operator retrieves the frame 1, the first filter screen 4, the second filter screen 5, and the collection tank 6 from the water surface. The operator aligns the bottom of the funnel 12 with the sampling bottle and then rotates the butterfly valve 11 to allow the planktonic-containing aqueous solution to flow into the sampling bottle, thus completing the sampling. The sampling bottle is typically made of transparent glass, and since this is existing technology, it will not be described in detail here.

[0035] It also takes into account underwater leakage by providing a first groove 17, a sealing ring 18 and a connecting pipe 19, thereby improving the sealing performance of the sealing box 13.

[0036] It also takes into account the different underwater sampling depths by setting up a first handle rod 7, a second handle rod 8, a pin rod 9 and a socket 10. The length of the first handle rod 7 and the second handle rod 8 can be adjusted by inserting the pin rod 9 into the socket 10 at different positions, so as to facilitate the sampling of plankton at different depths.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 multi-layer filter floating net, characterized in that, It includes a frame (1), a first filter screen (4) and a first handle (7): the first handle (7) is threaded to the side wall of the frame (1), the first filter screen (4) is woven on the inner side wall of the frame (1), a tripod (2) is fixed on the inner side wall of the frame (1) near the first filter screen (4), a paddle (3) is rotatably connected to the top of the tripod (2), a motor (16) is fixed at the bottom of the tripod (2), a sealing box (13) is fitted on the outer surface of the motor (16), a second filter screen (5) is woven on the outer surface of the first filter screen (4), a collection tank (6) is woven at the bottom of the second filter screen (5), a butterfly valve (11) is installed at the bottom of the collection tank (6), and a funnel (12) is inserted into the bottom of the butterfly valve (11).

2. The multi-layer filter floating net according to claim 1, characterized in that: The output end of the motor (16) is fixed in the middle of the blade (3) through the tripod (2). The external dimensions of the sealing box (13) are adapted to the internal dimensions of the motor (16). The sealing box (13) is threaded to the bottom of the tripod (2).

3. The multi-layer filter floating net according to claim 1, characterized in that: The top of the motor (16) has a first groove (17), and a sealing ring (18) is engaged inside the first groove (17). The sealing ring (18) is annular and matches the internal size of the first groove (17).

4. The multi-layer filter floating net according to claim 3, characterized in that: A connecting pipe (19) is inserted into the side wall of the motor (16). The connecting pipe (19) is connected to the power supply line of the motor (16). The middle of the connecting pipe (19) is filled with sealant.

5. The multi-layer filter floating net according to claim 1, characterized in that: The inner sidewall of the frame (1) is provided with a slot (15), and the sidewall of the frame (1) is provided with several holes and slots connected to the slot (15). The top of the tripod (2) is woven in the middle of the slot (15).

6. The multi-layer filter floating net according to claim 1, characterized in that: The first filter (4) has a double-layer composite structure, and the mesh diameter between the first filter (4) and the second filter (5) decreases sequentially.

7. The multi-layer filter floating net according to claim 1, characterized in that: A threaded groove (14) is provided on the side wall of the frame (1), and the first handle (7) is threadedly connected in the middle of the threaded groove (14).

8. The multi-layer filter floating net according to claim 1, characterized in that: The end of the first handle (7) is fitted with a second handle (8), and a pin (9) is threaded onto the side wall of the second handle (8). Several insertion holes (10) are provided on the side wall of the first handle (7) near the pin (9) for the pin (9) to be inserted.

Images