A kind of gold pompano fry sorting device

By designing a sorting device that utilizes the upstream swimming habits of golden pomfret fry, and employing multi-stage fish sieves and flow regulation components to guide water flow, the problems of high damage rate, low efficiency, and insufficient accuracy in fry sorting were solved, achieving efficient and accurate fry sorting.

CN224306582UActive Publication Date: 2026-06-02HAINAN UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HAINAN UNIV
Filing Date
2025-07-04
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing methods for sorting golden pomfret fry suffer from high fry damage rates, low sorting efficiency, and insufficient sorting accuracy. Manual sorting is slow, while traditional mechanical sorting equipment is prone to injuring fry and is inaccurate.

Method used

Design a sorting device for golden pomfret fry. Utilize the habit of golden pomfret fry swimming against the current and guide the fry to actively participate in the sorting by the water flow in the tank. Use multi-stage fish screens and flow regulating components to form a water flow direction from far to near, and use the design of the fish screen mesh with gradually decreasing size to carry out multi-stage sorting.

Benefits of technology

It reduces the damage rate of fish fry, improves sorting efficiency and accuracy, meets the needs of large-scale fish fry sorting, and increases sorting efficiency by tens of times and accuracy by more than 50%.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of gold pompano fry sorting devices, comprising: water tank, sorting component and flow adjusting component;Sorting component includes multiple fish screens;Multiple fish screens are sequentially spaced in water tank, to sequentially divide the inside of water tank into fry entering area and multiple fry sorting areas;Fry entering area is used to put the gold pompano fry to be sorted, in multiple fish screens, the mesh of fish screen is smaller when it is farther from fry entering area;Flow adjusting component is used to adjust the water flow direction of water tank, to form water flow from the farthest fry sorting area to fry entering area in water tank;The farthest fry sorting area is farthest from fry entering area. That is to say, the present gold pompano fry sorting device sorts using the habit of gold pompano fry swimming against water, so as to guide gold pompano fry to actively participate in sorting process by water flow from the farthest fry sorting area to fry entering area in water tank, this way not only reduces gold pompano fry damage rate, but also improves sorting efficiency, while also improves sorting accuracy.
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Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, and in particular to a golden pomfret fry sorting device. Background Technology

[0002] Currently, the sorting of golden pomfret fry mainly employs two methods: manual sorting and traditional mechanical sorting.

[0003] Manual sorting: Operators manually separate fry of different sizes by visually observing their size. This method relies on manual operation, has extremely low sorting efficiency, and long working hours can easily lead to visual fatigue and sorting errors. For example, in large-scale fry sorting scenarios, manual sorting can only process a small number of fry per day, which is difficult to meet the needs of the rapidly developing aquaculture industry.

[0004] Traditional mechanical sorting: Common mechanical sorting equipment mostly uses screens or grids for sorting. Among them, the screen mesh size of traditional grid structures is fixed. During the sorting process, some fry will be injured due to compression. At the same time, since it does not take advantage of the characteristics of the fry themselves, the sorting accuracy is low and it is easy to mix fry of different sizes. In addition, the structure of traditional grids makes it easy for fry to get stuck in the screen, which not only affects the sorting efficiency but may also lead to the death of the fry.

[0005] In other words, the existing methods for sorting golden pomfret fry have the following problems:

[0006] 1. High fry damage rate: In the traditional mechanical sorting process, fry are easily squeezed when passing through screens or grids with fixed apertures, causing physical damage and affecting the subsequent growth and survival rate of the fry.

[0007] 2. Low sorting efficiency: Manual sorting is slow, and traditional mechanical sorting is interrupted due to problems such as seedling jamming, making it difficult to improve overall efficiency;

[0008] 3. Insufficient sorting accuracy: Existing sorting technology does not make full use of the behavioral characteristics of fish fry themselves, and cannot accurately distinguish between fish fry of different sizes, resulting in inaccurate sorting results and affecting the uniformity of fish fry size in fish farming. Utility Model Content

[0009] In view of this, the present invention provides a golden pomfret fry sorting device, which utilizes the golden pomfret fry's habit of swimming against the current for sorting. In other words, the water flow in the tank from the furthest fry sorting area to the fry entry area guides the golden pomfret fry to actively participate in the sorting process. This method not only reduces the damage rate of golden pomfret fry, but also improves sorting efficiency and accuracy.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A sorting device for golden pomfret fry includes: a water tank, a sorting component, and a flow regulating component;

[0012] The sorting assembly includes multiple fish sieves;

[0013] Multiple fish sieves are arranged sequentially and at intervals inside the water tank to divide the interior of the water tank into a fry entry area and multiple fry sorting areas. The fry entry area is used to put golden pomfret fry to be sorted. Among the multiple fish sieves, the fish sieves with smaller mesh size are further away from the fry entry area.

[0014] The flow regulating component is used to adjust the water flow direction in the water tank to form a water flow from the farthest fry sorting area to the fry entry area within the water tank; wherein the farthest fry sorting area is the furthest from the fry entry area.

[0015] Preferably, a plurality of fish sieves are arranged at intervals along a first direction inside the water tank to divide the interior of the water tank into a fry entry area and a plurality of fry sorting areas along the first direction; wherein, the first direction is the length direction of the water tank;

[0016] The flow control component is used to adjust the water flow direction in the water tank to form a water flow along the first direction from the farthest fry sorting area to the fry entry area within the water tank.

[0017] Preferably, a plurality of fish sieves are arranged sequentially and spaced apart along the first direction between the first sidewall and the second sidewall of the water tank; wherein, the first sidewall of the water tank serves as a sidewall of the fry entry area, and the second sidewall serves as a sidewall of the furthest fry sorting area.

[0018] The flow regulating component is used to adjust the water flow direction of the water tank to form a water flow from the second side wall to the first side wall of the water tank along the first direction within the water tank.

[0019] Preferably, the second side wall of the water tank is provided with a water inlet;

[0020] The flow control component includes a micro-flow component;

[0021] The micro-flow water assembly is used to spray micro-flow water into the inlet of the water tank to form a water flow from the second sidewall to the first sidewall of the water tank along the first direction.

[0022] Preferably, the micro-water flow assembly includes: a water pump, a pipe, and a nozzle;

[0023] The water pump's inlet is used to connect to a water source;

[0024] One end of the pipe is connected to the outlet of the water pump, and the other end is connected to the inlet of the nozzle.

[0025] The nozzle's outlet end is connected to the water inlet of the water tank and is used to spray the micro-flow of water into the water inlet of the water tank.

[0026] Preferably, the first side wall of the water tank is provided with a water outlet;

[0027] The water inlet of the water tank is higher than the water outlet.

[0028] Preferably, the first port of the fish screen mesh is large and the second port is small; wherein, the first port of the mesh is the port facing the first side wall of the water tank, and the second port is the port facing the second side wall of the water tank.

[0029] Preferably, the cross-sectional shape of each grid bar forming the mesh of the fish sieve is an isosceles triangle.

[0030] Preferably, the plurality of fish sieves includes a first fish sieve and a second fish sieve;

[0031] The multiple fish fry sorting areas include a first fish fry sorting area and a second fish fry sorting area;

[0032] The first fish sieve is located between the fry entry area and the first fry sorting area, and the second fish sieve is located between the first fry sorting area and the second fry sorting area.

[0033] Preferably, the fry entry area of ​​the water tank is provided with a fry inlet, and multiple fry sorting areas are provided with fry sorting outlets.

[0034] As can be seen from the above technical solution, the golden pomfret fry sorting device provided by this utility model has the following beneficial effects:

[0035] 1. Reduce the damage rate of golden pomfret fry: This method utilizes the habit of golden pomfret fry swimming against the current for sorting. The golden pomfret fry swim actively under the guidance of the water flow, avoiding the damage to the golden pomfret fry caused by external pressure during the traditional mechanical sorting process.

[0036] 2. Improve sorting efficiency: The water flow in the tank causes the golden pomfret fry to automatically swim against the current for sorting, eliminating the need for manual selection or frequent handling of stuck fry. The entire sorting process is continuous and efficient, greatly improving sorting efficiency and meeting the needs of large-scale fry sorting.

[0037] 3. Improve sorting accuracy: Under the action of water flow, golden pomfret fry swim sequentially towards multiple fish sieves with progressively smaller mesh sizes, which can accurately distinguish between fry of different sizes and ensure the accuracy of sorting results. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A simplified structural diagram of the golden pomfret fry sorting device provided in this embodiment of the utility model.

[0040] Among them, 1 is the water tank, 11 is the fry entry area, 12 is the water inlet, 13 is the water outlet, 14 is the first fry sorting area, and 15 is the second fry sorting area.

[0041] 2 are golden pomfret fry;

[0042] 3 is the first fish sieve;

[0043] 4 is the second fish sieve. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] The golden pomfret fry sorting device provided in this embodiment of the utility model, such as Figure 1 As shown, it includes: water tank 1, sorting assembly and flow regulating assembly;

[0046] The sorting assembly includes multiple fish sieves;

[0047] Multiple fish sieves are arranged alternately in the water tank 1 to divide the interior of the water tank 1 into a fry entry area 11 and multiple fry sorting areas. The fry entry area 11 is used to put in the golden pomfret fry 2 to be sorted. Among the multiple fish sieves, the further away the fish sieve is from the fry entry area 11, the smaller its mesh size.

[0048] The flow control component is used to adjust the water flow direction of the water tank 1 so as to form a water flow from the farthest fry sorting area to the fry entry area 11 in the water tank 1; wherein the farthest fry sorting area is the furthest from the fry entry area 11.

[0049] It should be noted that, as Figure 1 As shown, water tank 1 serves as the sorting box of this golden pomfret fry sorting device, providing space for sorting golden pomfret fry;

[0050] Multiple fish sieves are arranged sequentially and at intervals within the water tank 1 along a specific direction (such as the length of the water tank 1) to divide the interior of the water tank 1 into a fry entry area 11 and multiple fry sorting areas. For example, if there are three fish sieves, the three fish sieves will divide the interior of the water tank 1 into the fry entry area 11 and three fry sorting areas. Of course, the bottom of each fish sieve must be connected to the bottom wall of the water tank 1, and the two sides must be connected to the two side walls of the water tank 1, so that the fish sieves form a separation effect inside the water tank 1. Among the multiple fish sieves, the fish sieves farther away from the fry entry area 11 have smaller mesh sizes, and conversely, the fish sieves closer to the fry entry area 11 have larger mesh sizes.

[0051] The flow control component is used to adjust the water flow direction of the water tank 1 so as to form a water flow from the farthest fry sorting area to the fry entry area 11 in the water tank 1, which means that the water in the water tank 1 flows from the farthest fry sorting area to the fry entry area 11.

[0052] Furthermore, it should be noted that golden pomfret fry have the habit of swimming against the current. This sorting device, by setting up a flow regulating component, creates a water flow within the water tank 1 from the furthest fry sorting area to the fry entry area 11. Under the influence of this water flow, the golden pomfret fry in the fry entry area 11 will swim against the current sequentially to multiple fry sorting areas, and thus to multiple fish sieves, achieving multi-stage sorting of the golden pomfret fry. This effectively enables the golden pomfret fry to actively swim against the current for multi-stage sorting. Of course, this... This sorting method, which utilizes the upstream swimming characteristic of golden pomfret fry, not only avoids the passive squeezing of fry caused by traditional mechanical sorting, greatly reducing the damage rate of the fry, but also requires minimal human intervention. The fry are automatically sorted under the guidance of water flow, significantly improving sorting efficiency. Furthermore, the increasingly smaller mesh size of the multiple fish sieves allows for precise differentiation between fry of different sizes, effectively improving sorting accuracy. Of course, this golden pomfret fry sorting device is also suitable for sorting other fry with upstream swimming habits.

[0053] In other words, the golden pomfret fry sorting device provided in this solution utilizes the upstream swimming habit of golden pomfret fry for sorting. Specifically, it guides the golden pomfret fry to actively participate in the sorting process by using the water flow within tank 1 from the furthest fry sorting area to the fry entry area 11. This method changes the existing sorting method, achieving a breakthrough in sorting technology in principle. Of course, this golden pomfret fry sorting device also has the following beneficial effects:

[0054] 1. Reduce the damage rate of golden pomfret fry: This method utilizes the habit of golden pomfret fry swimming against the current for sorting. The golden pomfret fry swim actively under the guidance of the water flow, avoiding the damage to the golden pomfret fry caused by external pressure during the traditional mechanical sorting process.

[0055] 2. Improve sorting efficiency: The water flow in the tank causes the golden pomfret fry to automatically swim against the current for sorting, eliminating the need for manual selection or frequent handling of stuck fry. The entire sorting process is continuous and efficient, greatly improving sorting efficiency and meeting the needs of large-scale fry sorting.

[0056] 3. Improve sorting accuracy: Under the action of water flow, golden pomfret fry swim in sequence to multiple fish sieves with progressively smaller mesh sizes, which can accurately distinguish between fry of different sizes and ensure the accuracy of sorting results; of course, only small fry that meet the size requirements can pass through the fish sieve with smaller mesh sizes, while large fry are effectively intercepted.

[0057] In this scheme, multiple fish sieves are arranged sequentially and spaced apart within the water tank 1 along a first direction, so as to divide the interior of the water tank 1 into a fry entry area 11 and multiple fry sorting areas along the first direction; wherein, the first direction is the length direction of the water tank 1, which is also the preset direction mentioned above; and the above scheme is designed in such a way that the interior of the water tank 1 is sequentially divided into a fry entry area 11 and multiple fry sorting areas; of course, the shape of the water tank 1 can be a cuboid structure, and correspondingly, the fish sieves can be a square structure;

[0058] The flow control component is used to adjust the water flow direction of the water tank 1 so as to form a water flow in the water tank 1 from the farthest fry sorting area to the fry entry area 11 along the first direction. In this way, the golden pomfret fry can be better guided to swim against the water flow from the fry entry area 11 to multiple fish screens in sequence, thereby better realizing the multi-level sorting of golden pomfret fry.

[0059] Specifically, multiple fish sieves are arranged sequentially and spaced apart between the first and second side walls of the water tank 1 along the first direction; wherein, the first side wall of the water tank 1 serves as a side wall of the fry entry area 11, and the second side wall serves as a side wall of the furthest fry sorting area.

[0060] The flow regulating component is used to adjust the water flow direction in the water tank 1, so as to form a water flow along a first direction from the second sidewall to the first sidewall of the water tank 1. The first and second sidewalls of the water tank 1 are distributed opposite each other along the first direction, and are also two opposite sidewalls of the water tank 1 in the length direction. This design facilitates the formation of a water flow within the water tank 1 that sequentially passes through multiple fry sorting areas and fry entry areas 11, and has the largest span, thus maximizing the guidance of the golden pomfret fry for sorting.

[0061] Furthermore, such as Figure 1 As shown, the second side wall of water tank 1 is provided with a water inlet 12;

[0062] The flow control components include micro-flow components;

[0063] The micro-flow component is used to spray micro-flow water into the inlet 12 of the water tank 1, so as to form a water flow from the second side wall to the first side wall of the water tank 1 in a first direction. Specifically, the micro-flow component sprays water into the water tank 1 in the form of micro-flows to form a stable micro-flow from the second side wall to the first side wall of the water tank 1 in a first direction, thereby facilitating better guidance of the golden pomfret fry to swim against the current for sorting. In addition, this solution can also use other flow-regulating components, such as injection components, or achieve flow regulation through mechanical disturbance. Of course, the mechanical disturbance method should not interfere with the swimming of the fry.

[0064] Furthermore, the microfluidic components include: a water pump, pipes, and nozzles;

[0065] The water pump's inlet is used to connect to a water source;

[0066] One end of the pipe is connected to the outlet of the water pump, and the other end is connected to the inlet of the nozzle.

[0067] The nozzle's outlet is connected to the inlet 12 of the water tank 1, and is used to spray a micro-flow of water into the inlet 12 of the water tank 1. The water pump's inlet can be connected to the outlet of an external water tank, so that the water pump can draw water from the external water tank, and then transport the drawn water to the nozzle through a pipe. The nozzle then sprays the water into the water tank 1 in the form of a micro-flow, so as to form a stable water flow in the water tank 1, thereby guiding the golden pomfret fry to swim against the current for sorting. Of course, as the nozzle continuously sprays micro-flow of water into the water tank 1, the water level in the water tank 1 will rise. When the water level in the water tank 1 rises to a certain level, it can be drained through the overflow port or outlet 13 of the water tank 1.

[0068] In this plan, such as Figure 1 As shown, the first side wall of the water tank 1 is provided with a water outlet 13;

[0069] The inlet 12 of the water tank 1 is higher than the outlet 13. Specifically, the inlet 12 of the water tank 1 can be located in the upper middle part of the second side wall of the water tank 1, and the outlet 13 can be located in the lower part of the first side wall of the water tank 1. That is, the inlet 12 of the water tank 1 is in a middle-high position, and the outlet 13 is in a low position. This is to form a uniform water flow in the water tank 1 and also to facilitate the rapid drainage of the water tank 1. Of course, both the inlet 12 and the outlet 13 of the water tank 1 can be equipped with valves.

[0070] Specifically, the first port of the fish sieve mesh is large, and the second port is small. The first port of the mesh faces the first sidewall of the water tank 1, and the second port faces the second sidewall of the water tank 1. The first port of each mesh opening is the inlet, and the second port is the outlet; that is, the inlet of the fish sieve mesh is large, and the outlet is small. In other words, this structure of large inlet and small outlet for each mesh opening not only effectively prevents fish fry from migrating back, ensuring the stability of sorting, but also allows for precise sorting based on the size of the fish fry. This structural design of the fish sieve mesh has a significant effect on fish fry sorting. Of course, the mesh walls of the fish sieve can have a gradually expanding structure along the water flow direction of the water tank 1.

[0071] Specifically, the cross-sectional shape of each grid bar forming the mesh of the fish sieve is an isosceles triangle.

[0072] It should be noted that the fish sieve is composed of multiple crisscrossing grids, and each mesh opening is formed by multiple grid strips. The cross-sectional shape of each grid strip forming the mesh opening can be an isosceles triangle. This allows the fish sieve mesh opening to have a structure where the inlet is larger than the outlet, and also allows the mesh walls to gradually expand along the water flow direction. This enables precise differentiation of fish fry by size, ensuring accurate sorting results. In other words, the unique isosceles triangular cross-sectional structure of the fish sieve's grids, creating a structure where the inlet is larger than the outlet, not only effectively prevents fish fry from migrating back, ensuring sorting stability, but also allows for precise selection based on the size of the fish fry.

[0073] Furthermore, such as Figure 1 As shown, the multiple fish sieves include a first fish sieve 3 and a second fish sieve 4;

[0074] Multiple fry sorting areas include the first fry sorting area 14 and the second fry sorting area 15;

[0075] The first fish sieve 3 is located between the fry entry area 11 and the first fry sorting area 14, and the second fish sieve 4 is located between the first fry sorting area 14 and the second fry sorting area 15. This design enables two-stage sorting of golden pomfret fry; of course, the number of fish sieves can be increased, and the number of fry sorting areas can be increased accordingly, thus enabling multi-stage sorting of golden pomfret fry.

[0076] Furthermore, the fry entry area 11 of tank 1 is equipped with a fry inlet to allow the golden pomfret fry to be sorted to be placed into the fry entry area 11 of tank 1. Multiple fry sorting areas are equipped with fry sorting outlets to allow the sorted fry to be discharged from each sorting area. The fry inlet can be located on the top wall of the fry entry area 11 of tank 1, and the fry sorting outlet can be located on the bottom wall of the fry sorting area of ​​tank 1.

[0077] Therefore, the golden pomfret fry sorting device provided in this solution innovatively utilizes the upstream swimming habit of golden pomfret fry for sorting. This is achieved by using a micro-flow component to guide the fry to actively participate in the sorting process. This sorting method changes the traditional method of relying on external force to select fry and represents a breakthrough in sorting technology in principle. Furthermore, this golden pomfret fry sorting device also has the following effects:

[0078] 1. The cross-sectional shape of the fish sieve grid is triangular, which makes the mesh of the fish sieve form a structure with a large inlet and a small outlet. This not only effectively prevents the fish fry from migrating back and ensures the stability of sorting, but also enables precise sorting according to the size of the fish fry. At the same time, this structural design has significant innovation and practicality in the field of fish fry sorting.

[0079] 2. Automated sorting process: By combining the micro-flow components with the unique grid of the fish sieve, an automated fish fry sorting process is constructed, which reduces manual intervention and improves sorting efficiency and quality, providing a brand-new and efficient solution for the sorting of golden pomfret fry.

[0080] Specifically, compared to manual sorting, this solution can increase sorting efficiency by dozens of times; compared to traditional mechanical sorting, the damage rate of fish fry is reduced by more than 60%, and the sorting accuracy is increased by more than 50%, which can meet the needs of large-scale, high-quality sorting of golden pomfret fry.

[0081] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0082] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sorting device for golden pomfret fry, characterized in that, include: Water tank (1), sorting assembly and flow regulating assembly; The sorting assembly includes multiple fish sieves; Multiple fish sieves are arranged sequentially and at intervals inside the water tank (1) to divide the interior of the water tank (1) into a fry entry area (11) and multiple fry sorting areas. The fry entry area (11) is used to put in the golden pomfret fry (2) to be sorted. Among the multiple fish sieves, the fish sieves further away from the fry entry area (11) have smaller mesh sizes. The flow control component is used to adjust the water flow direction of the water tank (1) to form a water flow from the farthest fry sorting area to the fry entry area (11) in the water tank (1); wherein the farthest fry sorting area is the furthest from the fry entry area (11).

2. The golden pomfret fry sorting device according to claim 1, characterized in that, Multiple fish sieves are arranged sequentially and spaced apart in the water tank (1) along a first direction to divide the interior of the water tank (1) into a fry entry area (11) and multiple fry sorting areas along the first direction; wherein, the first direction is the length direction of the water tank (1); The flow control component is used to adjust the water flow direction of the water tank (1) to form a water flow in the water tank (1) from the farthest fry sorting area to the fry entry area (11) along the first direction.

3. The golden pomfret fry sorting device according to claim 2, characterized in that, Multiple fish sieves are arranged sequentially and spaced apart between the first sidewall and the second sidewall of the water tank (1) along the first direction; wherein, the first sidewall of the water tank (1) serves as a sidewall of the fry entry area (11), and the second sidewall serves as a sidewall of the furthest fry sorting area. The flow regulating component is used to adjust the water flow direction of the water tank (1) to form a water flow from the second side wall to the first side wall of the water tank (1) along the first direction within the water tank (1).

4. The golden pomfret fry sorting device according to claim 3, characterized in that, The second side wall of the water tank (1) is provided with a water inlet (12); The flow control component includes a micro-flow component; The micro-flow water assembly is used to spray micro-flow water into the inlet (12) of the water tank (1) to form a water flow from the second sidewall to the first sidewall of the water tank (1) along the first direction within the water tank (1).

5. The golden pomfret fry sorting device according to claim 4, characterized in that, The microfluidic assembly includes: a water pump, pipes, and nozzles; The water pump's inlet is used to connect to a water source; One end of the pipe is connected to the outlet of the water pump, and the other end is connected to the inlet of the nozzle. The nozzle's outlet end is connected to the water inlet (12) of the water tank (1) and is used to spray the micro-flow water into the water inlet (12) of the water tank (1).

6. The golden pomfret fry sorting device according to claim 4, characterized in that, The water tank (1) has an outlet (13) on its first side wall. The inlet (12) of the water tank (1) is higher than the outlet (13).

7. The golden pomfret fry sorting device according to claim 3, characterized in that, The first port of the fish screen mesh is large and the second port is small; wherein, the first port of the mesh is the port facing the first side wall of the water tank (1), and the second port is the port facing the second side wall of the water tank (1).

8. The golden pomfret fry sorting device according to claim 7, characterized in that, The cross-sectional shape of each grid bar forming the mesh of the fish sieve is an isosceles triangle.

9. The golden pomfret fry sorting device according to claim 3, characterized in that, The plurality of fish sieves include a first fish sieve (3) and a second fish sieve (4); The multiple fry sorting areas include a first fry sorting area (14) and a second fry sorting area (15); The first fish sieve (3) is located between the fry entry area (11) and the first fry sorting area (14), and the second fish sieve (4) is located between the first fry sorting area (14) and the second fry sorting area (15).

10. The golden pomfret fry sorting device according to claim 3, characterized in that, The fry entry area (11) of the water tank (1) is provided with a fry inlet, and multiple fry sorting areas are provided with fry sorting outlets.