A microplastic sampling net

Abstract

The present invention discloses a microplastic sampling net, which relates to the field of environmental protection technology. This scheme makes full use of the hydrodynamic principle and the bubble effect. The water flows along the surface of the diffusion rudder to form a low-pressure area to attract external airflow into the collection device. At the same time, the vortex vibration plate at the tail of the diffusion rudder disperses the bubbles under the action of vortex-induced vibration, accelerating the convergence of microplastics to the collector. By controlling the angle of the diffusion rudder, the buoyancy can be flexibly adjusted at different speeds to adapt to different water flow environments. At the same time, the use mode of the support frame is switched by the positioning bolts and the positioning holes, and the form can be changed according to the needs of use in various water environments. The length of the net bag can also be quickly adjusted according to needs. The comprehensive overall design not only improves the microplastic collection efficiency, reduces the net bag residue, simplifies the deployment and collection process, but also enhances the stability of the device, providing an efficient and flexible solution for microplastic pollution control.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a microplastic sampling net. Background Art

[0002] With the rapid development of industrialization and urbanization, plastic products have become ubiquitous in our lives. However, this is accompanied by the increasing pollution of microplastics. Microplastics refer to plastic particles with a diameter of less than 5 mm. They come from the decomposition of plastic products, microbeads in detergents and other sources. Once they enter the water, they will have a serious impact on aquatic organisms and ecosystems.

[0003] Microplastic pollution has become one of the focal points of global environmental issues. In water bodies, microplastics are not only ingested by aquatic organisms, causing abnormal growth and development, but also enter the food chain, ultimately posing a potential threat to human health. Therefore, it is crucial to find effective methods for collecting and treating microplastics.

[0004] In the field of aquatic environmental protection and microplastic pollution control, there are some problems with traditional microplastic collection methods. Generally, traditional collection methods rely on artificial capture or fixed collection devices, which require a lot of manpower and maintenance, and are limited in use in diving environments. For example, in diving basin environments, the stability and durability of the collection device is still an important issue; in addition, how to achieve efficient separation and treatment of microplastics is also a difficult problem that needs to be solved urgently. Therefore, the research and development of new microplastic collection technologies is still of great significance, which can further improve the effects of aquatic environmental protection and microplastic pollution control. At present, most microplastic sampling is divided into two models: marine lakes and diving basins, which have certain defects in versatility. In addition, traditional collection devices also have certain limitations in efficiency and stability, and cannot fully meet the efficient demand for microplastic collection. Therefore, a novel technology is needed to solve these problems and improve the efficiency and stability of microplastic collection.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A microplastic sampling net, comprising:

[0008] Support frame;

[0009] Net bag;

[0010] One end of the net bag is fixedly connected to the surface of the support frame, and the net bag is arranged in a conical shape;

[0011] Collector;

[0012] The collector is fixedly installed at the other end of the net bag and is used to collect foreign matter in the net bag;

[0013] Diffuser rudder;

[0014] The diffuser rudder is located on the inner wall of the support frame and is arranged horizontally. Two flow collecting covers for guiding water flow are arranged on the water-facing surface of the diffuser rudder;

[0015] two support assemblies;

[0016] The support assembly is arranged through one side of the support frame, and two support assemblies are respectively located on both sides of the diffuser rudder and fixed thereto, and the support assembly connects the diffuser rudder with the outside air;

[0017] Adjustment components;

[0018] The adjustment component is fixedly connected to one side of the support frame and is used to drive the support assembly to adjust the water-impact angle of the diffuser rudder. The adjustment component is installed and fixed at one end of the support assembly on the corresponding side.

[0019] Positioning ring;

[0020] The positioning ring is fixedly connected to the inner wall of the net bag, and drawstrings are fixed at the four corners of the positioning ring;

[0021] A number of sliding sleeves;

[0022] The sliding sleeve is fixed on the surface of the support frame, and the positioning ring slides on the inner wall of the corresponding sliding sleeve;

[0023] hose;

[0024] The bottom end of the hose is connected to one end of the support assembly, and the top end of the hose is fixedly connected to the upper surface of the support frame.

[0025] Preferably, the support frame comprises a support seat, and a movable seat is slidably provided on the inner wall of the support seat;

[0026] There are two rotating pins that penetrate and rotate at a corner of the movable seat and the supporting seat;

[0027] The upper surface of the inner wall of the movable seat is arranged in an inclined surface.

[0028] Preferably, the current collecting cover is fixedly connected to the inner wall of the support seat, and the two current collecting covers are arranged in a trumpet shape.

[0029] Preferably, arc-shaped through holes are provided on both sides of the movable seat for cooperating with the sliding of the support assembly;

[0030] The fitting surfaces of the support seat and the movable seat are respectively penetrated with two mutually overlapping positioning holes, and positioning bolts are commonly penetrated in the corresponding connected positioning holes.

[0031] Preferably, the four corners of one side of the support frame are fixedly connected with shaping angle irons, and the outer side surface of the shaping angle irons is arranged in an inclined shape;

[0032] The shaping angle irons are fixedly connected in pairs at the corners of one side of the support seat and the movable seat.

[0033] Preferably, the support assembly includes a connecting chamber located at one side of the diffuser rudder and connected and fixed, and the other end of the connecting chamber is provided with a connecting joint, and the connecting joint is connected to the bottom end of the hose;

[0034] A ferrule is rotatably provided on the surface of the transfer chamber, the ferrule is fixedly connected to one side of the support seat, and the ferrule is slidably arranged on the inner wall of the arc-shaped perforation;

[0035] A connecting ring is fixedly connected to the surface of the ferrule, and a towing rack for dragging and fixing is commonly arranged on the surfaces of the connecting rings of the two supporting assemblies.

[0036] Preferably, the collector includes a fixed ring fixed to one end of the net bag, the surface thread of the fixed ring is matched with a collecting tank, a through pipe is fixed through the inner wall of the collecting tank, one end of the through pipe is covered with a mesh cover, and the mesh cover is arranged in a semicircular shape.

[0037] Preferably, the diffusion rudder comprises a main pipe fixed on opposite surfaces of the two transfer chambers, the surface of the main pipe is fixedly connected with a hollow chamber, and a negative pressure pipe is fixedly penetrated and fixed on one side of the main pipe and the surface of the hollow chamber;

[0038] A vortex vibration plate is fixedly connected to one side of the hollow chamber, and the hollow chamber is streamlined.

[0039] Preferably, the adjustment assembly includes a worm wheel fixedly connected to one end of the corresponding transfer chamber, the surface of the worm wheel is meshed with a worm, the surface of the worm has two rotating frames passing through it, the rotating frames are fixedly connected to the surface of the ferrule, and a torsion block is provided at one end of the worm.

[0040] Preferably, a mesh plate for blocking foreign matter is provided on one side of the support frame, and the mesh plate is fixedly connected to the surfaces of the two collecting covers.

[0041] Beneficial effects:

[0042] When the present solution is in use, as the water flow is pressurized to contact the diffusion rudder under the action of the two collecting hoods, the water flow fits and flows under the streamlined effect of the surface of the diffusion rudder, and a low-pressure area is formed at the tail of the diffusion rudder, thereby forming suction, and then the external airflow enters the main pipe through the hose and is discharged through a number of negative pressure pipes. The airflow begins to mix with the water flow, and at the same time, the vortex vibration plate at the tail of the diffusion rudder begins to swing under the action of its vortex-induced vibration, and the bubbles in the negative pressure pipe are beaten and dispersed during the swinging process, and are diffused into smaller bubbles and mixed with water and enter the net bag. The air that contacts the net bag is directly discharged, reducing the resistance of the net bag. At the same time, the bubbles can flush the inner wall of the net bag after mixing, accelerating the attached microplastics to converge to the tail of the net bag and enter the collector. At the same time, the bubbles have the effect of carrying microplastics, so that the bubbles can leave the microplastics in the collector when passing through the collector, and overall more efficient convergence and collection of microplastics is achieved to reduce the residue in the net bag, while reducing the resistance of the net bag to a certain extent, and the bubbles have a better cleaning effect;

[0043] When necessary, the positioning bolts can be taken out of the two overlapping positioning holes so that the movable seat can be rotated on one side of the support seat based on the rotating pin. Then, the positioning bolts are inserted after the two farther positioning holes begin to overlap. At this time, the movable seat can be kept in an inclined state, so that it can be placed in the diving basin for collection and detection;

[0044] When collecting in the diving basin, by pulling the upper and lower pull ropes of the support frame, the pull ropes are guided by the sliding sleeve, and the two pull ropes jointly pull the positioning ring, and then the positioning ring approaches the support frame under the tension, and the positioning ring first contacts the four shaping angle irons, so that the positioning ring is gradually squeezed into a rectangle and then fits on the surface of the support frame and continues to slide until the pull rope cannot be pulled. At this time, the net bag is partially folded, and the overall length is reduced, which meets the practical needs of low flow rate in the diving basin, can avoid the requirements of the placement environment for the net bag being too long, and at the same time reduce the damage of the net bag tail to the underwater stones and water plants. The folded net bag can be convenient for fewer staff in the diving basin to deploy or collect, and it is more convenient to use;

[0045] The direction of the diffusion rudder is regulated by adjusting the components. When it is towed on the water surface, the water-facing angle of the diffusion rudder is adjusted according to different ship speeds so that its support frame can float on the water surface at the top to ensure the stability of the collection. At the same time, when in the diving basin, the towing frame is towed and the diffusion rudder is tilted downward, so that the greater the water flow, the better the support frame is attached to the ground. At the same time, bubbles can enter the net bag to make it suspended or floating in the diving basin, preventing the middle part of the net bag from being scratched by stones when it is attached to the bottom.

[0046] In summary, this solution can switch the form of use in a variety of environments, making it highly adaptable and flexible to use. At the same time, the buoyancy of the hollow chamber is combined with the adjustment of the water-facing angle, so that the water entry depth in lakes and oceans can be changed and adjusted, and the large number of bubbles generated can improve the collection efficiency, reduce the residual amount of the net bag, reduce the water resistance of the net bag, and maintain the net bag in a floating state, which has a good protective effect.

[0047] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In the attached picture:

[0049] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0050] Figure 2 It is a schematic diagram of the structure of the support frame explosion of the present invention;

[0051] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the net bag of the present invention;

[0052] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention from the side;

[0053] Figure 5 It is a schematic diagram of a three-dimensional cross-sectional structure of the collector of the present invention;

[0054] Figure 6 It is a three-dimensional structural schematic diagram of the adjustment component of the present invention;

[0055] Figure 7 It is a three-dimensional structural schematic diagram of the support frame of the present invention;

[0056] Figure 8 It is a schematic diagram of the cross-sectional structure of the diffuser rudder of the present invention when viewed from above;

[0057] Fig. 9 This is a schematic structural diagram of one implementation state of the support frame of the present invention;

[0058] Fig.10 This is a structural schematic diagram of the second implementation state of the support frame of the present invention.

[0059] In the figure: 1, support frame; 101, support seat; 102, movable seat; 2, net bag; 3, collector;

[0060] 31. Fixed ring; 32. Collecting tank; 33. Through pipe; 34. Mesh cover; 4. Rotating pin; 5. Diffuser rudder; 51. Hollow chamber; 52. Main pipe; 53. Negative pressure pipe; 54. Vortex vibrator; 6. Support assembly; 61. Adapter chamber; 62. Card sleeve; 63. Adapter; 64. Connecting ring; 7. Adjusting assembly; 71. Worm gear; 72. Worm; 73. Torsion block; 74. Rotating frame; 8. Positioning ring; 9. Sliding sleeve; 10. Pull rope; 11. Collecting cover; 12. Shaping angle iron; 13. Mesh plate; 14. Hose; 15. Trailer; 16. Positioning hole; 17. Positioning bolt; 18. Arc-shaped perforation. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0062] like Figures 1 to 10 As shown, a microplastic sampling net comprises:

[0063] One end of the net bag 2 is fixedly connected to the surface of the support frame 1, and the net bag 2 is arranged in a conical shape;

[0064] The collector 3 is fixedly installed at the other end of the net bag 2 and is used to collect foreign matter in the net bag 2;

[0065] The diffuser rudder 5 is located on the inner wall of the support frame 1 and is arranged horizontally. Two flow collecting covers 11 for guiding water flow are arranged on the water-facing surface of the diffuser rudder 5.

[0066] The support assembly 6 is arranged through one side of the support frame 1, and two support assemblies 6 are respectively located on both sides of the diffuser rudder 5 and fixed thereto, and the support assembly 6 connects the diffuser rudder 5 with the outside air;

[0067] The adjustment component 7 is fixedly connected to one side of the support frame 1, and is used to drive the support assembly 6 to adjust the water-facing angle of the diffuser rudder 5. The adjustment component 7 is installed and fixed at one end of the support assembly 6 on the corresponding side;

[0068] The positioning ring 8 is fixedly connected to the inner wall of the net bag 2, and the four corners of the positioning ring 8 are fixed with a drawstring 10;

[0069] The sliding sleeve 9 is fixed on the surface of the support frame 1, and the positioning ring 8 slides on the inner wall of the corresponding sliding sleeve 9;

[0070] The bottom end of the hose 14 is connected to one end of the support assembly 6 , and the top end of the hose 14 is fixedly connected to the upper surface of the support frame 1 .

[0071] In this solution, the low-pressure area formed by the water flow under the action of the diffuser 5, combined with the mixing of bubbles and water promoted by vortex vibration, enables microplastics to be more efficiently gathered in the collector 3, while reducing the residual amount of the net bag 2 and improving the collection efficiency. In addition, the air is directly discharged from the net bag 2, which reduces the resistance of the net bag 2, making it easier to move in the water flow and reducing the obstruction to the trailer 15.

[0072] By adjusting the positioning bolt 17 and pulling the pull rope 10 on the support frame 1, the net bag 2 can be quickly switched in length in the diving basin. In order to adapt to the large flow of water in towing navigation, the traditional net bag 2 is designed to be larger. In a smaller water area, the water flow speed is lower and the flow rate is less. The longer net bag 2 not only cannot adapt to the characteristics of the water area, but is also easily scratched by underwater branches or stones. Therefore, the length of the folded net bag 2 is reduced, which is more suitable for the low flow rate environment of the diving basin.

[0073] Moreover, the shorter net bag 2 after adjustment can be arranged and put away by one person in a situation where it originally took two or three people to fold and store it, thereby improving the convenience of use.

[0074] By adjusting the angle of the diffuser rudder 5, the water-facing angle of the diffuser rudder 5 can be adjusted according to the change of the ship speed, so that the hollow chamber 51 forms a downward pressure under the action of the water flow, thereby ensuring the stability of the collector 3. In the diving basin, the diffuser rudder 5 is tilted downward by 45 degrees, so that it is subjected to a downward pressure and can better support the frame 1 close to the bottom of the water, and the diffuser rudder 5 guides the water flow at an angle of 45 degrees upward, so that the water flow mixed with bubbles enters the net bag 2 obliquely upward, so that the bubbles accumulated in the net bag 2 are more easily floated by the upward flowing water flow, so that the net bag 2 sinks to the bottom to prevent the net bag 2 from being damaged by underwater stones.

[0075] This design can be switched and used in different environments. It has high adaptability and can flexibly respond to different sampling needs. It can also flexibly adjust the water immersion depth, which improves the flexibility and versatility of use.

[0076] In summary, this solution not only improves the efficiency of microplastic collection, reduces the residual amount and resistance of the net bag 2, but also improves the convenience of deployment and collection, while ensuring the stability of the collector 3, and has high adaptability and protection effect.

[0077] Specifically, Figure 7 As shown: the support frame 1 includes a support seat 101, and a movable seat 102 is slidably provided on the inner wall of the support seat 101;

[0078] There are two rotating pins 4 that penetrate and rotate at a corner of the movable seat 102 and the supporting seat 101;

[0079] The upper surface of the inner wall of the movable seat 102 is arranged in an inclined surface.

[0080] The movable seat 102 is rotated on the surface of the support seat 101 through two rotating pins 4, so that under the restriction of the arc-shaped through-hole 18, the movable seat 102 cannot continue to rotate when it moves to a specified angle, and is fixed by the cooperation of the positioning bolt 17 and the corresponding two positioning holes 16, so that the support seat 101 can be switched to different forms;

[0081] Specifically, Figure 3 As shown: the current collecting cover 11 is fixedly connected to the inner wall of the support base 101, and the two current collecting covers 11 are arranged in a trumpet shape.

[0082] The collecting cover 11 is fixed to the inner wall of the supporting seat 101 so that it will not move along with the movement of the movable seat 102 and is always in a fixed position to cooperate with the pressurized water flow.

[0083] Specifically, Figure 2 As shown: arc-shaped through holes 18 are provided on both sides of the movable seat 102 for sliding with the support assembly 6;

[0084] The mating surfaces of the support seat 101 and the movable seat 102 are respectively penetrated with two mutually overlapping positioning holes 16 , and positioning bolts 17 are commonly provided through the corresponding connected positioning holes 16 .

[0085] When the arc-shaped through hole 18 moves with the movable seat 102, the supporting assembly 6 sliding inside the arc-shaped through hole 18 cooperates and limits the movable seat 102 so that the movable seat 102 cannot deflect to a greater extent.

[0086] Specifically, Figure 3 As shown: the four corners of one side of the support frame 1 are fixedly connected with a shaping angle iron 12, and the outer side surface of the shaping angle iron 12 is set in an inclined shape;

[0087] The shaping angle irons 12 are respectively located at one side corner of the support seat 101 and the movable seat 102 and are fixedly connected.

[0088] The shaping angle iron 12 is fixed at a corner of the support frame 1, and its inclined outer wall can shape the soft positioning ring 8. The positioning ring 8 is generally made of annular rubber material. When it is pulled by the four ends of the two pull ropes 10, the positioning ring 8 contacts the shaping angle iron 12, so that it can be gradually stretched to form a rectangular shape, so that it can be inserted into the surface of the support frame 1, thereby realizing the folding and storage of the net bag 2.

[0089] Specifically, Figure 8 As shown: the support assembly 6 includes a transfer chamber 61 which is connected and fixed to one side of the diffuser rudder 5, and a transfer joint 63 is provided at the other end of the transfer chamber 61, and the transfer joint 63 is connected to the bottom end of the hose 14;

[0090] A ferrule 62 is rotatably provided on the surface of the transfer chamber 61. The ferrule 62 is fixedly connected to one side of the support seat 101. The ferrule 62 is slidably disposed on the inner wall of the arc-shaped through hole 18.

[0091] A connecting ring 64 is fixedly connected to the surface of the ferrule 62 , and a towing frame 15 for towing and fixing is commonly provided on the surfaces of the connecting rings 64 of the two supporting assemblies 6 .

[0092] The adapter 63 enables the adapter chamber 61 to be connected to the hose 14 .

[0093] The top end of the hose 14 is located above the support frame 1, so that water will not enter it. At the same time, the transfer chamber 61 can be connected to the outside air through the hose 14. The sleeve 62 on the surface of the transfer chamber 61 can keep the transfer chamber 61 installed on the surface of the support seat 101, while maintaining the transfer chamber 61 to be able to rotate.

[0094] Specifically, Figure 5 As shown: the collector 3 includes a fixed ring 31 fixed to one end of the net bag 2, the surface thread of the fixed ring 31 is matched with a collecting tank 32, the inner wall of the collecting tank 32 is penetrated and fixed with a through pipe 33, one end of the through pipe 33 is covered with a net cover 34, and the net cover 34 is arranged in a semicircular shape.

[0095] The through pipe 33 inside the collection tank 32 can discharge the water flow, which can realize the convergence of water flow at the bottom of the net bag 2, thereby enhancing the collection effect of microplastics. At the same time, the mesh cover 34 set at one end of the through pipe 33 can block the microplastics. Combined with the semi-arc state of the surface, the overall situation of accumulation and blockage can be prevented.

[0096] Specifically, Figure 8 As shown: the diffuser rudder 5 includes a main pipe 52 fixed on the opposite sides of the two transfer chambers 61, the surface of the main pipe 52 is fixedly connected to the hollow chamber 51, and a negative pressure pipe 53 is fixedly penetrated and fixed on one side of the main pipe 52 and the surface of the hollow chamber 51;

[0097] A vortex vibration plate 54 is fixedly connected to one side of the hollow chamber 51 , and the hollow chamber 51 is streamlined.

[0098] By providing the hollow chamber 51, the hollow chamber 51 can provide a certain buoyancy, greatly reducing the overall gravity in the water, and the hollow chamber 51 is combined with the guidance of the water flow to enable it to float better.

[0099] Through the vortex vibration plate 54, vortex-induced vibration can be formed under the action of the wake flow gathered at the tail of the hollow chamber 51, prompting the vortex vibration plate 54 to disperse the air discharged from the negative pressure pipe 53 during vibration, thereby enhancing the mixing of air and water and increasing the diffusion range of bubbles in the water.

[0100] Specifically, Figure 4As shown: the adjustment component 7 includes a worm wheel 71 fixedly connected to one end of the corresponding transfer chamber 61, a worm 72 is meshedly arranged on the surface of the worm wheel 71, two rotating frames 74 are rotated through the surface of the worm 72, the rotating frames 74 are fixedly connected to the surface of the ferrule 62, and a torsion block 73 is arranged at one end of the worm 72.

[0101] The adjustment component 7 adopts the cooperation of the worm 72 and the worm wheel 71, so that its structure is extremely simple, and can realize one-way adjustment cooperation, realize the angle adjustment of the diffuser rudder 5, and can be adjusted with a wrench through the torsion block 73 on the surface, which is more convenient to use.

[0102] Specifically, Figure 1 As shown: a mesh plate 13 for blocking foreign matter is provided on one side of the support frame 1 , and the mesh plate 13 is fixedly connected to the surfaces of the two collecting covers 11 .

[0103] The mesh plate 13 can block larger foreign objects and prevent them from entering the net bag 2 and affecting the collection effect. At the same time, it can provide a good protection effect on the diffusion rudder 5 and prevent foreign objects from entering the net bag 2 and being difficult to remove.

[0104] When used with water flow dragging, the two collecting hoods are pressurized to contact the surface of the hollow chamber 51 of the diffuser 5, so that the surface of the hollow chamber 51 is streamlined, and the water flows in line with it, and a low-pressure area is formed at the tail of the diffuser 5, thereby forming suction. Then the external airflow enters the main pipe 52 fixed on the inner wall of the hollow chamber 51 through the hose 14, and is discharged through a number of negative pressure pipes 53 passing through the surface of the main pipe 52. The airflow begins to mix with the water flow at the tail of the hollow chamber 51, and at the same time, the vortex vibration at the tail of the diffuser 5 The sheet 54 begins to swing under the action of its vortex-induced vibration, and the bubbles in the negative pressure tube 53 are beaten and dispersed during the swinging process, and are diffused into smaller bubbles and mixed with water and enter the net bag 2. When the air contacts the net bag 2, part of the air is directly discharged, reducing the resistance of the net bag 2. At the same time, the bubbles can be mixed with the water and flush the inner wall of the net bag 2, accelerating the attached microplastics to converge to the tail of the net bag 2 and enter the collector 3. At the same time, the bubbles have the effect of carrying microplastics, so that the bubbles can leave the microplastics in the collector 3 when passing through the collector 3;

[0105] By taking out the positioning bolts 17 from the two overlapping positioning holes 16, the movable seat 102 can be rotated on one side of the support seat 101 based on the rotating pin 4, and then the positioning bolts 17 are inserted after the two farther positioning holes 16 begin to overlap, and at this time, the movable seat 102 can be kept in an inclined state, so that it can be placed in the diving basin for collection and detection;

[0106] When collecting in the submerged river basin, by pulling the upper and lower pull ropes 10 of the support frame 1, the pull ropes 10 are guided by the sliding sleeve 9, and the two pull ropes 10 jointly pull the positioning ring 8, and then the positioning ring 8 approaches the support frame 1 under the tension, and the positioning ring 8 first contacts the four shaping angle irons 12, so that the positioning ring 8 is gradually squeezed into a rectangle and then fits on the surface of the support frame 1 and continues to slide until the pull rope 10 can no longer be pulled, at which time the net bag 2 is partially folded and the overall length is shortened;

[0107] When deployed in a submerged basin, the diffusion rudder 5 is adjusted to a 45° downward angle by adjusting the assembly 7, so that after the towing frame 15 is fixed, under the action of the water flow, the diffusion rudder 5 provides a downward pressure to the support frame 1, thereby achieving the effect of auxiliary positioning sampling. In combination with the pulling and fixing of the towing frame 15, the overall comprehensive adaptability to submerged large flow waters is higher;

[0108] When collecting, the net bag 2 discharges the water, and the microplastics enter the fixed ring 31 of the collector 3 under the convergence effect of the net bag 2. The water flow mixed with bubbles and carrying microplastics contacts the surface of the semicircular mesh cover 34. Then the water flow and bubbles pass through the mesh cover 34 and are discharged through the through pipe 33. The microplastics enter the collection tank 32 under flushing. This design makes the water flow toward the collector 3 at the tail of the net bag 2, thereby improving the collection efficiency of microplastics.

[0109] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microplastic sampling net, characterized in that: include: Support frame (1); Net bag (2); One end of the net bag (2) is fixedly connected to the surface of the support frame (1), and the net bag (2) is arranged in a conical shape; Collector (3); The collector (3) is fixedly mounted on the other end of the net bag (2) and is used to collect foreign matter in the net bag (2); Diffuser rudder (5); The diffusion rudder (5) is located on the inner wall of the support frame (1) and is arranged in a horizontal shape. Two flow collecting covers (11) for guiding water flow are arranged on the water-facing surface of the diffusion rudder (5); two support assemblies (6); The support assembly (6) is arranged through one side of the support frame (1), and the two support assemblies (6) are respectively located on both sides of the diffuser rudder (5) and fixed thereto, and the support assembly (6) connects the diffuser rudder (5) with the outside air; Adjustment component (7); The adjusting component (7) is fixedly connected to one side of the support frame (1) and is used to drive the supporting assembly (6) to adjust the water-impact angle of the diffuser rudder (5); the adjusting component (7) is fixedly mounted to one end of the supporting assembly (6) on the corresponding side; Positioning ring (8); The positioning ring (8) is fixedly connected to the inner wall of the net bag (2), and drawstrings (10) are fixed at the four corners of the positioning ring (8); A plurality of sliding sleeves (9); The sliding sleeve (9) is fixed on the surface of the support frame (1), and the positioning ring (8) slides on the inner wall of the corresponding sliding sleeve (9); Hose (14); The bottom end of the hose (14) is connected to one end of the support assembly (6), and the top end of the hose (14) is fixedly connected to the upper surface of the support frame (1); The support frame (1) comprises a support seat (101), and a movable seat (102) is slidably provided on the inner wall of the support seat (101); The upper surface of the inner wall of the movable seat (102) is arranged in an inclined surface; Both sides of the movable seat (102) are provided with arc-shaped through holes (18) for cooperating with the support assembly (6) to slide; The mating surfaces of the support seat (101) and the movable seat (102) are respectively penetrated by two mutually overlapping positioning holes (16), and positioning bolts (17) are commonly provided through the corresponding connected positioning holes (16); The support assembly (6) comprises a transfer chamber (61) connected and fixed to one side of the diffuser rudder (5); a transfer joint (63) is provided at the other end of the transfer chamber (61); and the transfer joint (63) is connected to the bottom end of the hose (14); A ferrule (62) is rotatably provided through the surface of the transfer chamber (61), the ferrule (62) is fixedly connected to one side of the support seat (101), and the ferrule (62) is slidably arranged on the inner wall of the arc-shaped through hole (18); A connecting ring (64) is fixedly connected to the surface of the ferrule (62), and a towing frame (15) for towing and fixing is commonly provided on the surfaces of the connecting rings (64) of the two supporting assemblies (6); The diffusion rudder (5) comprises a main pipe (52) fixed to the opposite surface of the two transfer chambers (61), the surface of the main pipe (52) is fixedly connected to the hollow chamber (51), and a negative pressure pipe (53) is fixedly penetrated and fixed on one side of the main pipe (52) and the surface of the hollow chamber (51); A vortex vibration sheet (54) is fixedly connected to one side of the hollow chamber (51), and the hollow chamber (51) is arranged in a streamlined shape.

2. A microplastic sampling net according to claim 1, characterized in that: The current collecting covers (11) are fixedly connected to the inner wall of the support seat (101), and the two current collecting covers (11) are arranged in a trumpet shape.

3. A microplastic sampling net according to claim 1, characterized in that: The four corners of one side of the support frame (1) are all fixedly connected with shaping angle irons (12), and the outer side surface of the shaping angle iron (12) is arranged in an inclined shape.

4. A microplastic sampling net according to claim 1, characterized in that: The collector (3) comprises a fixed ring (31) fixed to one end of the net bag (2); a collecting tank (32) is threadedly matched on the surface of the fixed ring (31); a through pipe (33) is fixedly passed through the inner wall of the collecting tank (32); one end of the through pipe (33) is covered with a net cover (34); and the net cover (34) is arranged in a semicircular shape.

5. A microplastic sampling net according to claim 1, characterized in that: The adjusting assembly (7) comprises a worm wheel (71) fixedly connected to one end of the corresponding transfer chamber (61); a worm (72) is meshedly arranged on the surface of the worm wheel (71); two rotating frames (74) are rotatably passed through the surface of the worm (72); the rotating frames (74) are fixedly connected to the surface of the ferrule (62); and a torsion block (73) is arranged at one end of the worm (72).

6. A microplastic sampling net according to claim 1, characterized in that: A mesh plate (13) for blocking foreign matter is provided on one side of the support frame (1), and the mesh plate (13) is fixedly connected to the surfaces of the two collecting covers (11).

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