Fry adaptive domestication system and method based on multidirectional flow impact exercise

Abstract

The invention provides a fry adaptive domestication system and method based on multidirectional flow impact exercise, and relates to the technical field of fishery breeding, the system comprises three-section domestication pool bodies, the domestication pool bodies are detachably connected through flange plates, the bottom of each domestication pool body is fixedly connected with a supporting column, the upper portion of each supporting column is fixedly connected with a supporting seat, and the supporting seat is fixedly connected with the bottom of the corresponding domestication pool body. A motor is arranged on the upper portion of the supporting seat, a third bevel gear is fixed to the output end of the motor, and a connecting assembly facing the side wall of the domestication pool body in the radial direction is meshed with the third bevel gear. The invention provides a multi-directional flow impact training structure, which enables the fry to swim back and forth, turn and avoid and the like in radial, annular and spiral flow, the caudal peduncle muscle fiber density is improved by 20-30%, the swimming speed is improved by 40% compared with that of the traditional domesticated fry, the anti-countercurrent ability intensified training in the three-dimensional space of the fry is realized, and the endurance, explosive power and turning flexibility of the fry are improved in a balanced manner.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, specifically to a fish fry adaptability training system and method based on multi-directional flow impact training. Background Technology

[0002] Poor adaptability of fish fry during the transition from land to sea remains a key issue restricting deep-sea aquaculture. Currently, there are two main technical solutions for the domestication of marine fish fry: one is the traditional static domestication device, which simulates gradual salinity changes through a single water environment, but lacks active training for the fry's movement ability; the other is a simple flowing water domestication system, which uses unidirectional water flow to stimulate the fry's swimming. For example, the "intensive flowing water training method" recorded on the Chinese Encyclopedia website can only improve the endurance of juvenile carp, but cannot achieve multi-dimensional movement training.

[0003] Among the published related patents, CN219146453U (a mandarin fish fry domestication device) only solved the problem of rapid replacement of moving parts. Its core domestication mechanism still relies on the impact of water flow in a single direction and does not involve multi-directional flow field design. Although the domestication technology of precious fish species such as four-finger mackerel has achieved a breakthrough in feeding through biomimetic bait, the fry have a low survival rate in sea aquaculture due to insufficient resistance to countercurrent and slow adaptation to osmotic pressure regulation during the domestication process.

[0004] The structural causes of the core defects in existing technologies are as follows: 1. Simple flow field structure: Existing devices mostly adopt a single-sided or unidirectional water flow design, which allows fish fry to only perform directional swimming training. The caudal peduncle muscles develop unevenly, and the explosive power and turning ability are not effectively improved, making it difficult for them to adapt to complex non-directional flow fields after entering the sea. 2. Land-sea transition fault: Salinity regulation and exercise are independent of each other, lacking the coordinated control of "low-salinity-medium-high-salinity" gradient acclimatization and current intensity, the osmotic pressure regulation system and the locomotor system of fish fry cannot adapt to the marine environment synchronously; 3. Poor adaptability: The intensity of the current cannot be dynamically adjusted according to the growth stage of the fry, and there is a lack of targeted design for fry of different sizes. For example, small fry are easily injured by strong water currents, while large fry do not receive enough training. Monitoring gaps: The lack of linkage monitoring between flow field parameters and the physiological state of fish fry makes it impossible to accurately and scientifically control the domestication process, resulting in a long domestication cycle and unstable success rate. Summary of the Invention

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a fish fry adaptability training system based on multi-directional flow impact training, comprising a three-section training pool, wherein the training pools are detachably connected by flanges, a support column is fixedly connected to the bottom of the training pool, a support base is fixedly connected to the upper part of the support column, a motor is provided on the upper part of the support base, a third bevel gear is fixed to the output end of the motor, a connecting component is meshed on the third bevel gear and directed radially toward the side wall of the training pool, a jet component is meshed on the lower side of the connecting component, and an annular guide groove is provided at the bottom of the training pool and outside the support column; A flow guide plate is fixedly installed on the lower side of the support base. The flow guide plate is provided with a diversion pipe that passes through the connecting component and connects to the jet component. A flow rate sensor, a salinity sensor, a dissolved oxygen sensor and a high-definition camera are installed in the acclimatization tank.

[0006] Preferably, slots are provided on the support column and at the corners of the acclimatization pool, and a separation grid is slidably inserted into the slot.

[0007] Preferably, the annular guide channel is provided with a separator frame, the lower end of the separation grid is located above the separator frame, and the separator frame includes separator plates distributed along any direction of rotation.

[0008] Preferably, the connecting assembly consists of a support tube and a second bevel gear. A second bevel gear is fixedly connected to both ends of the support tube. The second bevel gear in the mirror inner direction meshes with a third bevel gear. The diverter tube passes through the inside of the support tube.

[0009] Preferably, the jet assembly consists of a jet unit and a first bevel gear fixedly connected. The first bevel gear meshes with a second bevel gear that is radially outward on the support tube. A support frame is fixedly connected to the support column. A rotating seat for rotatably supporting the jet unit and the support tube is provided on the support frame. The outer side of the jet unit includes a jet nozzle. The flow divider is correspondingly connected to the jet unit and communicates with the jet nozzle. A flow regulating valve is provided at the connection between the jet unit and the flow divider.

[0010] Preferably, each of the guide plates is connected to a central pipe, and the central pipe is connected to a variable frequency water pump. The variable frequency water pump can be adjusted by a PLC controller to achieve continuous adjustment of the water flow velocity from 0.1 to 0.8 m / s. The flow velocity sensor, salinity sensor, dissolved oxygen sensor, and high-definition camera are all electrically connected to the PLC controller for adjustment.

[0011] Preferably, the bottom of the annular guide channel is provided with a drainage channel, and a baffle net is provided on the outside of the drainage channel. A drainage valve is connected to the outside of the drainage channel. Each of the acclimatization tanks is connected to a salinity tank of different concentrations through a pipe with a solenoid valve. The solenoid valve is controlled by a PLC controller according to the signal of the salinity sensor. The salinity of the acclimatization tank 1 from left to right is 5‰-30‰, 15‰-30‰, and 28‰-35‰, respectively.

[0012] The fish fry adaptation and domestication method based on multi-directional flow-impact training includes the following: The tanks are divided into initial acclimatization tanks, transitional adaptation tanks, and marine simulation tanks according to salinity and flow velocity from low to high. Jet nozzles and separation grids with corresponding apertures are selected according to the size of the fish fry. The fish fry are placed in the land-based acclimatization section and the initial salinity is adjusted to 5‰-30‰ and the water flow velocity is 0.1m / s. First stage of acclimatization (1-5 days): Flow hammer mode: Activate the radial jet unit, set the nozzle rotation angle to 180° to form an alternating left and right flow field, run for 8 hours a day, and increase the water flow velocity by 0.1 m / s every day; Salinity adjustment: Based on the initial salinity value, increase the salinity by 0.5‰-2‰ daily, until it reaches 15‰-30‰; The second stage of acclimatization lasts 6-10 days: Flow hammer mode: The annular guide channel is activated, and the annular backflow combined with the annular jet unit, with the nozzle rotating at a 360° angle, forms a three-dimensional spiral flow field. When running for 10 hours a day, the water flow velocity is increased to 0.5-0.8 m / s. Salinity adjustment: Increase salinity by 1‰ daily to 20‰-30‰, while transferring the fish fry to the transitional adaptation phase; The third stage of acclimatization lasts 11-15 days: Flow hammer mode: Simulates the characteristics of ocean currents, and realizes pulsed changes in water flow velocity of 0.3-0.8m / s through PLC controller, with a pulse frequency of 5-10 times / minute, and runs for 12 hours a day; Salinity adjustment: Increase salinity by 0.5‰-2‰ daily until it reaches 32‰, then transfer the fish fry to the marine simulation section; Transition to the sea for 16-18 days: Maintain salinity of 28‰-35‰, reduce water flow speed to 0.2-0.3m / s, open some of the pool connecting valves to simulate the open marine environment, and finally realize the aquaculture of fish fry in the sea.

[0013] This invention provides a fish fry adaptive domestication system and method based on multi-directional flow-impact training. It has the following beneficial effects: 1. A multi-directional flow-impact training structure is provided, which enables fish fry to complete back-and-forth swimming, turning and evading movements in radial, circular and spiral flows. The density of caudal peduncle muscle fibers is increased by 20%-30%, and the swimming speed is increased by 40% compared with traditionally domesticated fish fry. It realizes the strengthening training of fish fry's ability to resist backflow in three-dimensional space, and evenly improves their endurance, explosive power and turning flexibility. 2. Construct a relay system of "land-based gradient acclimatization - marine transitional adaptation" to enable salinity regulation and current-driven training to proceed simultaneously, shorten the acclimatization period, adapt to different fish species ranging from 3 to 25 cm in size, avoid injury to fish fry, and control the mortality rate of fish fry to within 5% during the acclimatization process. 3. Design dynamically adjustable flow field intensity and spatial distribution to adapt to the growth needs of fish fry of different sizes; 4. Integrating flow field parameters and fish fry physiological status monitoring modules enables precise control of the domestication process and improves the survival rate of fish fry entering the sea for aquaculture. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a longitudinal sectional view of the acclimatization pool at the corresponding separation grid in this invention; Figure 3 This is a top view of the acclimatization pool in this invention; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 For the present invention in Figure 3 A horizontal sectional view located on the upper side of the third bevel gear.

[0015] The components include: 1. acclimatization pool; 2. support frame; 3. jet unit; 4. first bevel gear; 5. second bevel gear; 6. support pipe; 7. motor; 8. support base; 9. separation grid; 10. annular guide channel; 11. drainage channel; 12. partition frame; 13. support column; 14. diversion pipe; 15. third bevel gear; and 16. guide plate. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figure 1-5As shown, this embodiment of the invention provides a fish fry adaptation and domestication system based on multi-directional current-driven training, including a three-section domestication pool 1. The salinity of the domestication pool 1 from left to right is 5‰-30‰, 15‰-30‰, and 28‰-35‰, respectively. It is divided into an initial domestication pool (salinity 5‰-30‰), a transitional adaptation pool (salinity 15‰-30‰), and a marine simulation pool (salinity 28‰-35‰) according to salinity from low to high. The domestication pools 1 are detachably connected by flanges. A support column 13 is fixedly connected to the bottom of the domestication pool. A support base 8 is fixedly connected to the upper part, and a motor 7 is provided on the upper part of the support base 8. The support base 8 is fixed to the support base 8 by a vertical rod. The vertical rod is located outside the connecting shaft connected to the output end of the motor 7. A third bevel gear 15 is fixed on the connecting shaft connected to the motor 7. The third bevel gear 15 is rotated by the motor 7 driving the connecting shaft. A connecting component is meshed on the third bevel gear 15 and is radially toward the side wall of the acclimatization pool 1. A jet component is meshed on the lower side of the connecting component. An annular guide groove 10 is provided at the bottom of the acclimatization pool 1 and outside the support column 13. A flow guide plate 16 is fixedly installed on the lower side of the support base 8. The support base 8 includes a support plate on the upper side of the upright. The motor 7 is installed on the upper side of the support plate. The flow guide plate 16 is located outside the connecting shaft and below the support plate. The flow guide plate 16 is provided with a diversion pipe 14 that passes through the connecting assembly and connects to the jet assembly. A flow velocity sensor, a salinity sensor, a dissolved oxygen sensor and a high-definition camera are installed in the acclimatization tank 1. The flow velocity sensor, salinity sensor, dissolved oxygen sensor and high-definition camera are arranged according to the separation area of ​​the separation grid 9. The flow velocity sensor is used to monitor the water flow velocity in the corresponding area, the salinity sensor is used to monitor the salinity, the dissolved oxygen sensor is used to monitor the dissolved oxygen, and the high-definition camera is used to collect flow field parameters and fish fry swimming status in real time.

[0018] Slots are provided on the support column 13 and at the corners of the acclimatization pool 1. Separation grids 9 are slidably inserted into the slots. The separation grids 9 are detachable grids with a mesh size of 0.3-1cm, which divide the pool into multiple acclimatization areas. An elastic buffer layer is provided at the edge of the grid to prevent the fish fry from being injured by collision.

[0019] A separator frame 12 is provided on the annular guide channel 10, and the lower end of the separation grid 9 is located above the separator frame 12. The separator frame 12 includes separator plates distributed along any direction of rotation.

[0020] The connecting assembly consists of a support tube 6 and a second bevel gear 5. Both ends of the support tube 6 are fixedly connected to a second bevel gear 5. The second bevel gear 5 in the mirror inner direction meshes with a third bevel gear 15. The diverter tube 14 passes through the inside of the support tube 6. After the third bevel gear 15 is driven to rotate by the connecting shaft connected to the motor 7, the third bevel gear 15 drives the support tube 6 to rotate and the other support tube 6 connected to the support tube 6 to rotate through the transmission with the meshing second bevel gear 5. The rotation of the support tube 6 will not interfere with the diverter tube 14.

[0021] The jet assembly consists of a fixedly connected jet unit 3 and a first bevel gear 4. The first bevel gear 4 meshes with a second bevel gear 5 that is radially outward from the support tube 6. A support frame 2 is fixedly connected to the support column 13. A rotating seat is provided on the support frame 2 to rotatably support the jet unit 3 and the support tube 6. The outer side of the jet unit 3 includes a jet nozzle. A flow divider 14 is correspondingly connected to the jet unit 3 and communicates with the jet nozzle. A flow regulating valve is provided at the connection between the jet unit 3 and the flow divider 14. The rotation of the first bevel gear 4 is achieved by rotating the first bevel gear 4 and the meshing second bevel gear 5, thereby changing the rotation angle of the jet unit 3. The flow rate is controlled by the flow regulating valve. The jet nozzle can be replaced according to the flow rate requirements.

[0022] The guide plate 16 is connected to a central pipe, which in turn is connected to a variable frequency water pump. The variable frequency water pump can be adjusted by a PLC controller to achieve continuous adjustment of the water flow velocity from 0.1 to 0.8 m / s. The flow velocity sensor, salinity sensor, dissolved oxygen sensor, and high-definition camera are all electrically connected to the PLC controller. The PLC controller has a built-in matching database of fish fry growth stage, flow intensity, and salinity gradient, which can automatically adjust the operating parameters.

[0023] A drainage trough 11 is provided at the bottom of the annular guide channel 10. A baffle is provided on the outside of the drainage trough 11. A drainage valve is connected to the outside of the drainage trough 11. Each acclimatization pool 1 is connected to a salinity tank of different concentrations through a pipe with a solenoid valve. The solenoid valve is controlled by a PLC controller according to the signal from the salinity sensor. The drainage trough 11 is connected to a drainage pipe. The drainage in the annular guide channel 10 through the drainage trough 11 achieves annular reflux.

[0024] The fish fry adaptation and domestication method based on multi-directional flow-impact training includes the following: Select the appropriate jet nozzle and separation grid 9 according to the size of the fish fry, put the fish fry into the land-based acclimatization section, and adjust the initial salinity to 5‰-30‰ and the water flow velocity to 0.1m / s; First stage of acclimatization (1-5 days): Flow hammer mode: Activate the radial jet unit, set the nozzle rotation angle to 180° to form an alternating left and right flow field, run for 8 hours a day, and increase the water flow velocity by 0.1 m / s every day; Salinity adjustment: Based on the initial salinity value, increase the salinity by 0.5‰-2‰ daily, until it reaches 15‰-30‰; The second stage of acclimatization lasts 6-10 days: Flow hammer mode: The annular backflow combined with the jet unit of the drainage channel is activated, and the nozzle rotates 360° to form a three-dimensional spiral flow field. When running for 10 hours a day, the water flow velocity is increased to 0.5-0.8m / s. Salinity adjustment: Increase salinity by 1‰ daily to 20‰-30‰, while transferring the fish fry to the transitional adaptation phase; The third stage of acclimatization lasts 11-15 days: Flow hammer mode: Simulates the characteristics of ocean currents, and realizes pulsed changes in water flow velocity of 0.3-0.8m / s through PLC controller, with a pulse frequency of 5-10 times / minute, and runs for 12 hours a day; Salinity adjustment: Increase salinity by 0.5‰-2‰ daily until it reaches 32‰, then transfer the fish fry to the marine simulation section; Transition to the sea for 16-18 days: Maintain salinity of 28‰-35‰, reduce water flow speed to 0.2-0.3m / s, open some of the pool connecting valves to simulate the open marine environment, and finally realize the aquaculture of fish fry in the sea.

[0025] The above example uses the domestication of barramundi fry with an initial body length of 10cm: Equipment configuration: nozzle orifice diameter 2mm, bar screen aperture 0.5cm, variable frequency water pump power 1.5kW; Acclimation parameters: In the first stage, the water flow velocity gradually increases from 0.1 m / s to 0.3 m / s, and the salinity changes from 5‰ to 10‰; in the second stage, the water flow velocity increases from 0.4 to 0.6 m / s, and the salinity changes from 10‰ to 20‰; in the third stage, the pulse flow velocity increases from 0.3 to 0.8 m / s, and the salinity changes from 20‰ to 32‰. Results: The acclimatization was completed in 15 days. The caudal peduncle area of ​​the fish fry increased by 23% compared with the traditional method, the instantaneous oxygen consumption rate decreased by 18%, and the survival rate of fish released into the sea for aquaculture increased to over 95%.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fish fry adaptive domestication system based on multi-directional flow-impact training, characterized in that: The acclimatization pool includes a three-section acclimatization pool (1), which is detachably connected by flanges. A support column (13) is fixedly connected to the bottom of the acclimatization pool, and a support base (8) is fixedly connected to the upper part of the support column (13). A motor (7) is provided on the upper part of the support base (8), and a third bevel gear (15) is fixed to the output end of the motor (7). A connecting component is meshed on the third bevel gear (15) and is radially toward the side wall of the acclimatization pool (1). A jet component is meshed on the lower side of the connecting component. An annular guide groove (10) is provided at the bottom of the acclimatization pool (1) and on the outside of the support column (13). A flow guide plate (16) is fixedly installed on the lower side of the support base (8). The flow guide plate (16) is provided with a diversion pipe (14) that passes through the connecting component and connects to the jet component. A flow rate sensor, a salinity sensor, a dissolved oxygen sensor and a high-definition camera are provided inside the acclimatization pool (1).

2. The fish fry adaptive domestication system based on multi-directional flow-impact training according to claim 1, characterized in that: The support column (13) and the corner of the acclimatization pool (1) are respectively provided with slots, and a separation grid (9) is slidably inserted into the slot.

3. The fish fry adaptive domestication system based on multi-directional flow impact training according to claim 2, characterized in that: A separator frame (12) is provided on the annular guide groove (10), and the lower end of the separation grid (9) is located above the separator frame (12). The separator frame (12) includes separator plates distributed along any direction of rotation.

4. The fish fry adaptive domestication system based on multi-directional flow-impact training according to claim 3, characterized in that: The connecting assembly consists of a support tube (6) and a second bevel gear (5). Both ends of the support tube (6) are fixedly connected to a second bevel gear (5). The second bevel gear (5) in the mirror inner direction meshes with a third bevel gear (15). The diverter tube (14) passes through the inside of the support tube (6).

5. The fish fry adaptive domestication system based on multi-directional flow-impact training according to claim 4, characterized in that: The jet assembly consists of a fixedly connected jet unit (3) and a first bevel gear (4). The first bevel gear (4) meshes with a second bevel gear (5) that is radially outward on the support tube (6). A support frame (2) is fixedly connected to the support column (13). A rotating seat for rotating the jet unit (3) and the support tube (6) is provided on the support frame (2). The outer side of the jet unit (3) includes a jet nozzle. The diverter pipe (14) is correspondingly connected to the jet unit (3) and communicates with the jet nozzle. A flow regulating valve is provided at the connection between the jet unit (3) and the diverter pipe (14).

6. The fish fry adaptive domestication system based on multi-directional flow impact training according to claim 5, characterized in that: The guide plate (16) is connected to a central pipe, which is connected to a variable frequency water pump. The variable frequency water pump can be adjusted by a PLC controller to achieve a continuously adjustable water flow rate of 0.1-0.8 m / s. The flow rate sensor, salinity sensor, dissolved oxygen sensor and high-definition camera are all electrically connected to the PLC controller.

7. The fish fry adaptive domestication system based on multi-directional flow-impact training according to claim 6, characterized in that: The bottom of the annular guide channel (10) is provided with a drainage channel (11), and a baffle net is provided on the outside of the drainage channel (11). A drainage valve is connected to the outside of the drainage channel (11). Each of the acclimatization pools (1) is connected to a salinity tank of different concentrations through a pipe with a solenoid valve. The solenoid valve is controlled by a PLC controller according to the signal of the salinity sensor. The salinity of the acclimatization pools (1) from left to right is 5‰-30‰, 15‰-30‰, and 28‰-35‰, respectively.

8. A method for implementing the fish fry adaptive domestication system based on multi-directional flow-impact training as described in claim 7, characterized in that, Includes the following: According to the salinity and flow velocity from low to high, the pools are divided into initial acclimatization pool, transitional adaptation pool and marine simulation pool. The appropriate nozzle and separation grid (9) are selected according to the size of the fish fry. The fish fry are placed in the land-based acclimatization section and the initial salinity is adjusted to 5‰-30‰ and the water flow velocity is 0.1m / s. First stage of acclimatization (1-5 days): Flow hammer mode: Activate the radial jet unit, set the nozzle rotation angle to 180° to form an alternating left and right flow field, run for 8 hours a day, and increase the water flow velocity by 0.1 m / s every day; Salinity adjustment: Based on the initial salinity value, increase the salinity by 0.5‰-2‰ daily, until it reaches 15‰-30‰; The second stage of acclimatization lasts 6-10 days: Flow hammer mode: The annular guide channel (10) is opened to combine the annular backflow jet unit, the nozzle rotates 360° to form a three-dimensional spiral flow field, and the water flow velocity is increased to 0.5-0.8m / s when running for 10 hours a day. Salinity adjustment: Increase salinity by 1‰ daily to 20‰-30‰, while transferring the fish fry to the transitional adaptation phase; The third stage of acclimatization lasts 11-15 days: Flow hammer mode: Simulates the characteristics of ocean currents, and realizes pulsed changes in water flow velocity of 0.3-0.8m / s through PLC controller, with a pulse frequency of 5-10 times / minute, and runs for 12 hours a day; Salinity adjustment: Increase salinity by 0.5‰-2‰ daily until it reaches 32‰, then transfer the fish fry to the marine simulation section; Transition to the sea for 16-18 days: Maintain salinity of 28‰-35‰, reduce water flow speed to 0.2-0.3m / s, open some of the pool connecting valves to simulate the open marine environment, and finally realize the aquaculture of fish fry in the sea.

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