A screening and grading device for aquatic seedlings

Abstract

This utility model applies to the field of aquaculture equipment, providing an aquatic seedling screening and grading device, including a culture pond; the culture pond is divided into a rearing pond and a separation pond by a partition; a grading screen is installed inside the rearing pond to divide the rearing pond into two areas; a drive mechanism is installed on the top of the grading screen to move the grading screen; the grading screen includes a fixed screen and an adjustable screen, both of which have a frame structure, and several screen bars are evenly installed inside the frame structure, with gaps between the screen bars; a screen adjustment mechanism is installed on the fixed screen to drive the adjustable screen to move laterally on the fixed screen. Therefore, this device can adapt to the grading requirements of seedlings of different sizes, replacing the traditional manual catching and sorting method, which not only greatly improves grading efficiency and reduces labor intensity, but also effectively reduces damage to fish seedlings caused by manual operation.

Description

Technical Field

[0001] This utility model applies to the field of aquaculture equipment and provides an aquatic seedling screening and grading device. Background Technology

[0002] The cultivation of aquatic seedlings is typically carried out in specially designed rearing ponds. The water quality, temperature, and nutrient composition of these ponds are strictly controlled to provide the optimal growth environment for the seedlings. From hatching, the seedlings gradually develop into individuals suitable for stocking after a period of cultivation. During this process, the seedlings' growth status and nutritional needs constantly change, thus requiring meticulous management and scientific feeding methods to ensure their healthy growth.

[0003] Screening and grading are crucial steps in the feeding of aquatic fry. Because fry of different sizes can exhibit significant weight variations within the same batch, neglecting screening and grading can easily lead to competition for food, resulting in larger fry biting smaller ones, or even larger fish preying on smaller ones. This not only affects the healthy growth of the fry but also leads to losses in aquaculture profits. Therefore, to ensure that each fry receives an appropriate amount of feed and to prevent larger fish from oppressing smaller ones, screening and grading become essential measures.

[0004] However, existing aquatic seedling screening and grading methods typically rely on manual operation, which is cumbersome and labor-intensive. Manual screening is not only time-consuming but also cannot guarantee efficiency. This bottleneck is particularly pronounced in large-scale aquaculture farms, significantly impacting the efficiency of aquaculture management. Therefore, there is an urgent need for a more efficient and convenient aquatic seedling screening and grading device to improve screening efficiency, reduce manual labor, and ensure the accuracy of seedling screening. Utility Model Content

[0005] To address the aforementioned deficiencies, the present invention aims to provide an aquatic seedling screening and grading device, which is intended to solve the problems mentioned in the background art. The device includes a breeding pond; the breeding pond is internally divided into a rearing pond and a separation pond by a partition.

[0006] The cultivation tank is equipped with a grading screen that divides the interior of the cultivation tank into two areas; the top of the grading screen is equipped with a drive mechanism that can move the grading screen.

[0007] The grading screen includes a fixed screen and an adjustable screen. Both the fixed screen and the adjustable screen have a frame structure. Several screen bars are evenly installed inside the frame structure, and there are gaps between the screen bars.

[0008] The fixed screen is equipped with a screen adjustment mechanism that can drive the adjustable screen to move laterally on the fixed screen.

[0009] Furthermore, the cultivation tank is equipped with two movable fixing devices, and the grading screen is installed between the two fixing devices; there are two driving mechanisms, which are respectively installed on the two fixing devices.

[0010] Furthermore, the driving mechanism includes a gear that can rotate driven by a motor, and the cultivation tank is provided with a toothed mechanism arranged along the movement direction of the grading screen, the toothed mechanism meshing with the gear.

[0011] Furthermore, a set of rotatable wheels is installed at the bottom of the fixing device.

[0012] Furthermore, the fixing device is fixedly connected to a protruding support mechanism on the side near the inner wall of the cultivation tank. The support mechanism is equipped with a rotatable roller. The inner wall of the cultivation tank is provided with a groove that cooperates with the support mechanism. The groove is provided with a track that is adapted to the roller. The roller is located inside the track.

[0013] Furthermore, the screen adjustment mechanism includes a motor mounted on a fixed screen, with a screw fixedly connected to the output end of the motor, and a threaded seat that is threadedly engaged with the screw fixedly connected to the adjusting screen.

[0014] Furthermore, a gate is installed on the partition.

[0015] Furthermore, a light panel is provided on the top of the partition near the cultivation pool.

[0016] Furthermore, the side walls of the cultivation tank and the separation tank are respectively provided with a first drain outlet and a second drain outlet.

[0017] This invention utilizes a screen adjustment mechanism to flexibly and precisely control the screening gap of the grading screen, adapting to the grading requirements of different fry sizes and improving the device's versatility. Simultaneously, a drive mechanism automatically moves the grading screen to complete the screening, replacing the traditional manual retrieval and sorting method. This significantly improves grading efficiency, reduces labor intensity, and effectively minimizes damage to fry caused by manual operation, thus ensuring fry survival rates and health. Furthermore, the wheel assembly at the bottom of the fixed device and the rolling support structure formed by the support mechanism and the pool wall track ensure the stability and reliability of the grading screen during long-distance movement, making the entire sorting process smooth and controllable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the device structure;

[0019] Figure 2 This is a top view of the device structure;

[0020] Figure 3This is a diagram showing the connection between the fixing device and the grading screen;

[0021] Figure 4 This is a magnified view of a grading screen.

[0022] In the diagram: 1-Aquaculture pond; 101-First drain outlet; 102-Second drain outlet; 11-Cultivation pond; 12-Separation pond; 13-Toothed tooth mechanism; 2-Grading screen; 21-Fixed screen; 22-Adjusting screen; 3-Fixing device; 31-Drive mechanism; 32-Gear; 33-Supporting mechanism; 34-Wheel set; 4-Screw adjustment mechanism; 40-Threaded seat; 41-Screw; 5-Baffle plate; 6-Light panel; 7-Gate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0027] See Figure 1-4The purpose of this utility model is to provide an aquatic seedling screening and grading device, including a breeding pond 1, the interior of which is divided into a rearing pond 11 and a separation pond 12 by a partition 5;

[0028] The cultivation tank 11 is equipped with a grading screen 2 that divides the interior of the cultivation tank 11 into two regions; specifically, the grading screen 2 is arranged along the width direction of the cultivation tank 11. A drive mechanism 31 is installed on the top of the grading screen 2, which can move the grading screen 2, and the area ratio of the two regions inside the cultivation tank 11 can be adjusted as the grading screen 2 moves.

[0029] The grading screen 2 includes two screen structures, namely a fixed screen 21 and an adjustable screen 22. The fixed screen 21 and the adjustable screen 22 have the same structure, each having a frame structure. Several screen bars are evenly installed inside the frame structure, and there are gaps between the screen bars.

[0030] A screen adjustment mechanism 4 is installed on the fixed screen 21, and the output end of the screen adjustment mechanism 4 is configured to cooperate with the adjustable screen 22. The adjustable screen 22 can move laterally relative to the fixed screen 21 under the drive of the screen adjustment mechanism 4. Specifically, the adjustable screen 22 is set close to the fixed screen 21. When the adjustable screen 22 is in the initial position, the projections of the adjustable screen 22 and the fixed screen 21 in the vertical direction coincide. At this time, the gap between the screen bars on the two sets of screens is at its maximum, which can ensure that larger fish fry can pass through the grading screen 2. When the adjustable screen 22 moves laterally under the drive of the screen adjustment mechanism 4, the maximum gap between the screen bars on the two sets of screens will gradually decrease (that is, the screen bars on the two sets of screens intersect each other). By controlling the amount of movement of the adjustable screen 22, the maximum gap between the screen bars can be controlled, thereby restricting larger fish fry from passing through the grading screen 2.

[0031] Preferably, the cultivation tank 11 has two movable fixing devices 3 installed inside, and the grading screen 2 is installed between the two fixing devices 3. The device has two drive mechanisms 31, each mounted on one of the two fixing devices 3. Specifically, the drive mechanism 31 includes a gear 32 driven by a motor, and the cultivation tank 11 has a toothed mechanism 13 arranged along the direction of movement of the grading screen 2, which meshes with the gear 32. When the motor of the drive mechanism 31 drives the gear 32 to rotate, the gear 32 interacts with the toothed mechanism 13, allowing the fixing devices 3 to move within the cultivation tank 11, and the grading screen 2 to move accordingly.

[0032] Example 1

[0033] Based on the above, one method of using this device is given below. It is worth noting that this device can also be used in other ways. The following embodiments are only used to explain that this device can achieve the effect of sorting fish fry.

[0034] See appendix Figure 2 As shown in the top view, the grading screen 2 is initially positioned at the far right of the rearing pond 11, with the gaps between the screen bars on both sets of screens at their maximum. When fry sorting is required, the fry can be attracted to the left side of the grading screen 2 by either driving them or using light attraction (a light is placed on the left side of the grading screen 2 to attract most of the fry). Then, the screen adjustment mechanism 4 is activated to reduce the maximum gap between the screen bars to a size suitable for grading. The position of the light attraction is then changed, or feed is placed on the right side of the grading screen 2 to attract the fry on the left side. During this process, the drive mechanism 31 moves the grading screen 2 continuously to the left, thus moving the larger fry away from the left. This completes the fry sorting process.

[0035] Preferably, the bottom of the fixing device 3 is equipped with a rotatable wheel set 34, which can support the fixing device 3 and enable the fixing device 3 to move smoothly in the cultivation tank.

[0036] Preferably, the fixing device 3 is fixedly connected to a protruding support mechanism 33 on the side near the inner wall of the cultivation tank 11, and a rotatable roller is mounted on the support mechanism 33. The inner wall of the cultivation tank 11 has a groove that mates with the support mechanism 33, and a track adapted to the roller is provided inside the groove, with the roller located inside the track. The roller on the support mechanism 33 can roll within the groove, thereby limiting the position of the fixing device 3 and simultaneously sharing the weight of the fixing device.

[0037] Preferably, the screen adjustment mechanism 4 includes a motor mounted on the fixed screen 21, with a screw 41 fixedly connected to the output end of the motor, and a threaded seat that threadedly engages with the screw 41 fixedly connected to the adjusting screen 22. When the motor drives the screw 41 to rotate, the threaded seat on the adjusting screen 22 will cause the adjusting screen 22 to move relative to the fixed screen 21, thereby achieving the purpose of adjusting the gap between the screen bars. Specifically, a limiting device is also provided between the adjusting screen 22 and the fixed screen 21 to ensure that the adjusting screen 22 can slide relative to the fixed screen 21.

[0038] Example 2

[0039] Based on Embodiment 1, preferably, a gate 7 is installed on the partition 5, which, when opened, allows the separation tank 12 to communicate with the cultivation tank. Therefore, one method of using this device is given below.

[0040] Preferably, a light panel 6 is provided on the top of the partition 5 near the cultivation tank 11.

[0041] See appendix Figure 2 As shown in the top view, the grading screen 2 is initially positioned at the far left of the rearing tank 11, with the gaps between the screen bars on both sets of screens at their maximum. When fry sorting is required, the fry can be attracted to the right side of the grading screen 2 by either driving them or using light attraction (the light panel 6 on the right side of the grading screen 2 attracts the fry). Then, the screen adjustment mechanism 4 is activated to reduce the maximum gap between the screen bars to a size suitable for grading. The position of the light attraction is then changed (the light panel 6 is turned off, and a light is placed on the side of the rearing tank 11 away from the light panel 6), or feed is placed on the left side of the grading screen 2 to attract the fry on the right side. During this process, the drive mechanism 31 moves, causing the grading screen 2 to continuously move to the right, thus carrying larger fry away to the right, completing the fry sorting step.

[0042] After the grading screen 2 pushes the large fish fry to one end of the rearing pond 11, the gate 7 located on the partition 5 can be opened to allow the batch of large fish fry to enter the adjacent separation pond 12 for centralized collection. The separation pond 12 is specifically used for storing and temporarily holding the graded fry, thereby achieving physical isolation and separate pond management of fry of different sizes.

[0043] Preferably, the side walls of the cultivation tank 11 and the separation tank 12 are respectively provided with a first drain outlet 101 and a second drain outlet 102.

[0044] In summary, in practical use, the staff first places the fish fry to be graded in the rearing pond 11 and gathers them to one side of the grading screen 2 by driving them or attracting them with lights. Then, the screen adjustment mechanism 4 is activated, driving the adjusting screen 22 to move laterally relative to the fixed screen 21, causing the screen bars on the two sets of screens to interlace, thereby precisely adjusting the maximum gap between the screen bars to meet the target grading size. Next, by changing the feeding point or the light position, the fish fry are attracted to move to the other side of the grading screen 2. Simultaneously, the drive mechanism 31 is activated, causing the motor to drive the gear 32 to rotate. The gear 32 meshes with the toothed mechanism 13 on the side wall of the rearing pond 11, driving the fixed device 3 and the grading screen 2 mounted on it to move slowly laterally. During this process, fish fry smaller than the set gap can pass through the grading screen 2, while larger fish fry are blocked by the grading screen 2 and move along with it, eventually being pushed and concentrated in a specific area of ​​the rearing pond 11, thus achieving rapid, continuous, and precise fry grading.

[0045] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A screening and grading device for aquatic seedlings, characterized in that, It includes a breeding pond (1); the breeding pond (1) is divided into a cultivation pond (11) and a separation pond (12) by a partition (5); The cultivation tank (11) is equipped with a grading screen (2) that divides the inside of the cultivation tank (11) into two regions; the top of the grading screen (2) is equipped with a drive mechanism (31) that can move the grading screen (2). The grading screen (2) includes a fixed screen (21) and an adjustable screen (22). Both the fixed screen (21) and the adjustable screen (22) have a frame structure. Several screen bars are evenly installed inside the frame structure, and there are gaps between the screen bars. The fixed screen (21) is equipped with a screen adjustment mechanism (4) that can drive the adjustable screen (22) to move laterally on the fixed screen (21).

2. The aquatic seedling screening and grading device according to claim 1, characterized in that, The cultivation tank (11) is equipped with two movable fixing devices (3), and the grading screen (2) is installed between the two fixing devices (3); there are two driving mechanisms (31), and the two driving mechanisms (31) are respectively installed on the two fixing devices (3).

3. The aquatic seedling screening and grading device according to claim 1, characterized in that, The drive mechanism (31) includes a gear (32) that can rotate driven by a motor. The cultivation tank (11) is provided with a toothed mechanism (13) arranged along the movement direction of the grading screen (2). The toothed mechanism (13) meshes with the gear (32).

4. The aquatic seedling screening and grading device according to claim 2, characterized in that, The bottom of the fixing device (3) is equipped with a rotatable wheel set (34).

5. The aquatic seedling screening and grading device according to claim 2, characterized in that, The fixing device (3) is fixedly connected to the protruding support mechanism (33) on the side near the inner wall of the cultivation pool (11). The support mechanism (33) is equipped with a rotatable roller. The inner wall of the cultivation pool (11) is provided with a groove that cooperates with the support mechanism (33). The groove is provided with a track that is adapted to the roller. The roller is located inside the track.

6. The aquatic seedling screening and grading device according to claim 1, characterized in that, The screen adjustment mechanism (4) includes a motor installed on the fixed screen (21), the output end of the motor is fixedly connected to a screw (41), and the adjustment screen (22) is fixedly connected to a threaded seat that is threadedly engaged with the screw (41).

7. The aquatic seedling screening and grading device according to claim 1, characterized in that, A gate (7) is installed on the partition (5).

8. The aquatic seedling screening and grading device according to claim 1, characterized in that, The top of the partition (5) near the cultivation tank (11) is equipped with a light panel (6).

9. The aquatic seedling screening and grading device according to claim 1, characterized in that, The cultivation tank (11) and the separation tank (12) are respectively provided with a first drain outlet (101) and a second drain outlet (102) on their side walls.

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