Salmon egg breeding and hatching integrated device and method

Abstract

The present application relates to the technical field of fish egg cultivation, in particular to a salmon egg selection, breeding and hatching integrated device and method, the device comprising a hatching pool, a partition is arranged in the center of the hatching pool, and the partition divides the hatching pool into a hatching cavity and a breeding cavity; a slidable overflow pipe is arranged on the partition; a filter assembly is arranged in the breeding cavity, and the filter assembly comprises a mounting frame and a filter screen; through linkage of the overflow pipe and the filter screen, automatic regulation and control of water quality purification and fry protection during salmon egg hatching is realized. The self-adaptive angle adjustment of the filter screen with the overflow pipe lifting, combined with the gap channel, realizes efficient separation of fry and impurities, not only guarantees the survival rate of fry, but also maintains the cleanliness of the hatching environment through concentrated salvage of impurities, provides hatching conditions for salmon sink eggs, which simulate the natural water flow cycle, reduces egg adhesion and improves hatching efficiency, and realizes the optimal breeding goal of salmon fry.

Description

Technical Field

[0001] This invention relates to the field of fish egg cultivation technology, specifically to an integrated device and method for salmon egg selection and hatching. Background Technology

[0002] Fish egg hatching is a core step in large-scale aquaculture, and its technological level directly affects the number of fry hatched and the survival rate in later stages of rearing. For demersal and slightly adhesive eggs (such as Qinghai Lake naked carp and salmon eggs), key problems during hatching include dead egg deposition, egg membrane adhesion, and water pollution from metabolites. Traditional hatching methods usually require transferring the deadhesive fertilized eggs to a special hatching box for flowing water hatching, and then transferring them to rearing equipment after they develop to a specific stage. This process has drawbacks such as cumbersome operation, high damage rate during transportation, and easy deterioration of water quality.

[0003] Chinese patent application publication number CN117502317A discloses an integrated device for hatching and rearing naked carp eggs. It utilizes a structure combining a strip tank and a circular tank, employing a water spray pipe to rotate the hatching box and break the egg membrane, attempting to solve the connection problem between the incubator and the rearing tank. However, this patent's water level adjustment relies on manual operation, making it difficult to precisely match the water flow requirements of different developmental stages of the fish eggs. The water level difference control between the initial and later stages of membrane breaking is crude, potentially causing fry to passively impact the filter screen with the water flow, increasing the risk of mechanical damage. Simultaneously, the hatching box floats within the circular tank, and rotation is achieved solely through water spraying from the water spray pipe, resulting in insufficient water flow uniformity and easy localized accumulation of fish eggs. Furthermore, dead eggs, egg membranes, and other impurities enter the strip tank with the water flow, and the lack of a dynamic cleaning mechanism, relying solely on a fixed filter screen for interception, allows impurities to easily accumulate at the bottom of the tank, forming a pollution source. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an integrated device and method for salmon egg selection and hatching. Through the linkage of an overflow pipe and a filter screen, it achieves automated control of water purification and fry protection during salmon egg hatching. The filter screen's adaptive angle adjustment, which rises and falls with the overflow pipe, combined with gap channels, enables efficient separation of fry and impurities. This ensures fry survival rates and maintains a clean hatching environment by concentrating and removing impurities. It provides hatching conditions that simulate natural water flow cycles for sinking salmon eggs, reducing egg adhesion and improving hatching efficiency, thus achieving the goal of optimal salmon fry breeding.

[0005] To address the problems of existing technologies, this invention provides an integrated salmon egg breeding and hatching device, comprising a hatching tank with a partition in the center dividing the tank into a hatching chamber and a rearing chamber; an overflow pipe that can slide along the height of the hatching tank is provided on the partition; a filter assembly is provided in the rearing chamber, including a mounting frame fitted onto the overflow pipe, and a rotatable filter screen is provided on the mounting frame; a gap is left between the end of the filter screen away from the overflow pipe and the inner wall of the rearing chamber to allow the fry to swim through; when the overflow pipe rises, the filter screen rotates towards the overflow pipe; when the overflow pipe descends, the filter screen rotates away from the overflow pipe.

[0006] Preferably, a baffle extending along the edge of the filter screen is provided on the side of the filter screen away from the overflow pipe.

[0007] Preferably, the top of the incubation pool is provided with a vertical lead screw and a guide rod, and a support frame is provided on the mounting frame. The support frame is sleeved on the lead screw and threadedly engaged with it, and the support frame is sleeved on the guide rod and slidably engaged with it.

[0008] Preferably, a rotating shaft is provided on both sides of the filter screen, the rotating shaft is rotatably mounted on the mounting frame, a gear is sleeved on the rotating shaft, and a vertical rack is fixedly connected to the inner wall of the breeding chamber, the rack meshing with the gear.

[0009] Preferably, the incubation pool is equipped with a distance sensor to monitor the movement distance of the support frame.

[0010] Preferably, the incubation chamber is equipped with a rotatable incubation tray, the bottom of which is inclined, and multiple ventilation holes arranged in a rectangular row on the incubation tray.

[0011] Preferably, the inner wall of the incubation chamber is provided with multiple nozzles, which are used to spray water onto the surface of the incubation tray.

[0012] Preferably, the bottom of the incubation chamber is provided with an aeration component located below the incubation tray, and the aeration component has multiple aeration heads distributed on it.

[0013] Preferably, a cleaning head for backwashing the filter screen is provided on the side of the breeding chamber away from the overflow pipe.

[0014] A method for selecting and hatching salmon eggs, applied to the aforementioned integrated salmon egg selection and hatching device, includes the following steps: S1. Place the salmon eggs in the hatching chamber and adjust the overflow pipe to the initial height so that the water level in the hatching chamber is higher than that in the rearing chamber, thus creating natural overflow power.

[0015] S2. When it is necessary to discharge metabolites and impurities, the overflow pipe is lowered. The water flow carries dead eggs, impurities and hatched fry into the breeding chamber through the overflow pipe. The fry swim through the gap between the filter screen and the inner wall of the breeding chamber to the bottom of the filter screen. The dead eggs and impurities are intercepted by the filter screen.

[0016] S3. When it is necessary to clean the impurities in the breeding chamber, the overflow pipe is raised. At this time, the filter screen will rotate towards the overflow pipe and detach from the water surface, exposing the intercepted impurities above the water surface for centralized collection. At the same time, the hatching chamber will switch to a water storage state and temporarily stop overflowing.

[0017] S4. Before the filter screen is raised with the overflow pipe, bait is placed below the filter screen in the breeding chamber to guide the fish fry to swim to the bottom of the filter screen, so as to avoid the fish fry remaining on the filter screen.

[0018] The advantages of this invention compared to the prior art are: 1. This invention achieves automated control of water purification and fry protection during salmon egg hatching through the linkage of an overflow pipe and a filter screen. The overflow pipe slides to adjust the water level, ensuring the hatching chamber is always higher than the rearing chamber, creating natural overflow power. This replaces the forced drainage of traditional water pumps, avoiding mechanical damage to the fry from strong water flow and saving energy. When the overflow pipe descends, the filter screen automatically rotates away from the overflow pipe and tilts, becoming submerged in the water. The gap between the filter screen and the inner wall of the rearing chamber provides an escape channel for the fry, allowing them to swim downstream to below the filter screen. Simultaneously, dead eggs and impurities are intercepted, preventing contaminants from accumulating and deteriorating in the hatching chamber. When the overflow pipe rises, the filter screen rises accordingly and turns towards the overflow pipe, exposing the intercepted impurities above the water surface. The filter screen's scooping action concentrates the impurities, allowing workers to directly clean the contaminants on the filter screen without additional machine shutdown or underwater operations, reducing labor intensity.

[0019] 2. This invention, through the design of a rotating hatching disc, keeps salmon sinking eggs in a continuously suspended and bouncing state via mechanical movement. This effectively solves the problems of egg adhesion and oxygen deficiency caused by sinking to the bottom in traditional static hatching, thus improving the hatching success rate. Combined with the nozzles and aeration components, the eggs are evenly exposed to oxygen-rich water during the rolling process, optimizing the hatching environment. This promotes the development of the fry's natural swimming ability, laying a healthy foundation for subsequent aquaculture stages. Attached Figure Description

[0020] Figure 1 A schematic diagram of a three-dimensional structure of an integrated salmon egg breeding and hatching device. Figure 1 ; Figure 2 This is a top view of an integrated salmon egg breeding and hatching device; Figure 3 A schematic diagram of a three-dimensional structure of an integrated salmon egg breeding and hatching device. Figure 2 ; Figure 4 This is a schematic diagram of the cross-sectional structure of an overflow pipe descending in an integrated salmon egg breeding and hatching device; Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the overflow pipe descending in an integrated salmon egg breeding and hatching device; Figure 6 This is a schematic diagram of the cross-sectional structure of the overflow pipe rising in an integrated salmon egg breeding and hatching device. Figure 7 This is a schematic diagram of the three-dimensional cross-sectional structure of the overflow pipe rising in an integrated salmon egg breeding and hatching device. Figure 8 A schematic diagram of a three-dimensional structure of an integrated salmon egg breeding and hatching device. Figure 3 ; Figure 9 This is a three-dimensional structural diagram of the incubation tray and aeration components in an integrated salmon egg breeding and incubation device; Figure 10 This is a three-dimensional structural diagram of the filter components and overflow pipe in an integrated salmon egg breeding and hatching device.

[0021] The diagram is labeled as follows: 1. Hatching pool; 11. Partition; 111. Overflow pipe; 12. Hatching chamber; 121. Hatching tray; 1211. Ventilation hole; 122. Nozzle; 123. Aeration assembly; 1231. Aeration head; 13. Culture chamber; 131. Filter assembly; 1311. Mounting frame; 13111. Support frame; 1312. Filter screen; 13121. Baffle; 13122. Rotating shaft; 13123. Gear; 14. Lead screw; 15. Guide rod; 16. Mounting chamber; 161. Drive motor; 17. Rack; 18. Distance sensor; 19. Cleaning head. Detailed Implementation

[0022] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 7As shown: An integrated breeding and hatching device for salmon eggs includes a hatching pool 1, with a partition 11 in the center of the hatching pool 1, dividing the hatching pool 1 into a hatching chamber 12 and a rearing chamber 13; an overflow pipe 111 that can slide along the height direction of the hatching pool 1 is provided on the partition 11; a filter assembly 131 is provided in the rearing chamber 13, the filter assembly 131 including a mounting frame 1311 sleeved on the overflow pipe 111, and a rotatable filter screen 1312 is provided on the mounting frame 1311; a gap is left between the end of the filter screen 1312 away from the overflow pipe 111 and the inner wall of the rearing chamber 13 to allow the fry to swim through; when the overflow pipe 111 rises, the filter screen 1312 will rotate in the direction of the overflow pipe 111; when the overflow pipe 111 descends, the filter screen 1312 will rotate away from the overflow pipe 111.

[0024] When incubating salmon eggs, the eggs are first placed in the incubation chamber 12. Metabolites and impurities produced during incubation will flow into the rearing chamber 13 through the overflow pipe 111. The overflow pipe 111 can slide along the height of the incubation tank 1 to regulate and control the water level in the incubation chamber 12, ensuring that it is always higher than the rearing chamber 13, thus creating a natural overflow force.

[0025] A U-shaped groove extending along the height of the hatching tank 1 is formed on the partition 11. A seal made of silicone is installed inside the groove, covering the entire groove opening area. An overflow pipe 111 is vertically fixed to the center of the seal, and the two are rigidly connected by waterproof bolts. A lip structure is provided between the two side walls of the silicone seal and the inner wall of the U-shaped groove. The lip is made of elastic silicone and is integrally molded. When the seal slides up and down in the U-shaped groove, the lip elastically deforms and adheres tightly to the groove wall, forming a dynamic watertight seal. It should be noted that a drain pipe is installed in the breeding chamber 13 to control the water level in the breeding chamber 13, ensuring that the water level in the breeding chamber 13 is always maintained within a certain range.

[0026] When the overflow pipe 111 descends, the water flow carries fish eggs, dead eggs and impurities into the breeding chamber 13 through the overflow pipe 111. At this time, the filter screen 1312 located in the breeding chamber 13 will rotate away from the overflow pipe 111, so that the filter screen 1312 is submerged in the water in an inclined state. Since there is a gap between the end of the filter screen 1312 away from the overflow pipe 111 and the inner wall of the breeding chamber 13, and this gap can allow the fish fry to pass through, the fish fry can swim with the water flow through the gap to the bottom of the filter screen 1312, while the dead eggs and impurities flowing out with the water flow are intercepted by the filter screen 1312. As incubation progresses, the fry hatch from the salmon eggs. By raising the overflow pipe 111, the drainage level in the incubation chamber 12 is raised, causing the incubation chamber 12 to enter a water-filled state and temporarily stopping the overflow. At the same time, the filter screen 1312 rotates towards the overflow pipe 111 as it is raised, causing the filter screen 1312 to detach from the water surface and lift the intercepted impurities above the water surface. The scooping action of the filter screen 1312 concentrates and exposes the impurities, making it easier for staff to directly collect and clean the impurities on the filter screen 1312.

[0027] It should be noted that when the filter screen 1312 is raised along with the overflow pipe 111, it is ensured that no fish fry remain on the filter screen 1312 to prevent fish fry mortality. To this end, feed or bait can be placed below the filter screen 1312 within the rearing chamber 13 to attract the fish fry to swim downwards from the filter screen 1312, preventing them from swimming on the filter screen 1312. Simultaneously, because the filter screen 1312 is tilted, the water depth on the side of the filter screen 1312 away from the overflow pipe 111 is greater than the side of the filter screen 1312 closer to the overflow pipe 111. This causes the fish fry to be guided towards the bottom of the rearing chamber 13 by the water flow and depth.

[0028] By installing the mounting bracket 1311 on the overflow pipe 111, the position between the filter screen 1312 and the overflow pipe 111 is kept at a fixed height, so as to avoid the overflow pipe 111 and the filter screen 1312 being too high when the water flow carries the fish fry into the breeding chamber 13, resulting in excessive impact force of impurities and causing the fish fry to die.

[0029] The device achieves automated control of water purification and fry protection during salmon egg hatching through the linkage of overflow pipe 111 and filter screen 1312. The water level is adjusted by sliding the overflow pipe 111, ensuring that the hatching chamber 12 is always higher than the rearing chamber 13, creating natural overflow power. This replaces the forced drainage of traditional water pumps, avoiding mechanical damage to the fish fry from strong water flow and saving energy. When the overflow pipe 111 descends, the filter screen 1312 automatically rotates away from the overflow pipe 111 and tilts to be submerged in the water. The gap between the filter screen and the inner wall of the rearing chamber 13 provides an escape channel for the fish fry, allowing them to swim with the water flow to the area below the filter screen 1312. At the same time, dead eggs and impurities are intercepted, preventing pollutants from accumulating and deteriorating in the hatching chamber 12. When the overflow pipe 111 rises, the filter screen 1312 rises accordingly and turns towards the overflow pipe 111, exposing the intercepted impurities above the water surface. The impurities are concentrated through the scooping action of the filter screen 1312, allowing staff to directly clean the pollutants on the filter screen 1312 without additional machine shutdown or underwater operation, reducing labor intensity.

[0030] By integrating hatching and rearing functions into a single device using the above method, the partition 11 and overflow pipe 111 achieve regional separation and water flow control, reducing the space occupied by traditional separate pond rearing and the need for fry transfer, and minimizing stress damage to fry during transfer. The mounting bracket 1311 fitted onto the overflow pipe 111 maintains a fixed height between the filter screen 1312 and the overflow pipe 111, ensuring that when the water carries fry into the rearing chamber 13, the impact of impurities is controlled within the fry's tolerance range, preventing fry death due to water flow impact. The adaptive angle adjustment of the filter screen 1312 as it rises and falls with the overflow pipe 111, combined with the gap channel, achieves efficient separation of fry and impurities, ensuring fry survival rate and maintaining a clean hatching environment through concentrated impurity removal. This provides hatching conditions simulating the natural water flow cycle for salmon sinking eggs, reducing egg adhesion and improving hatching efficiency. This achieves the goal of optimal salmon fry rearing while ensuring stable water quality in the hatching tank 1, providing a clean environment for salmon egg hatching.

[0031] like Figures 3 to 7 and Figure 10 As shown: A baffle 13121 extending along the edge of the filter screen 1312 is provided on the side of the filter screen 1312 away from the overflow pipe 111.

[0032] During the salmon egg incubation process, when water flows from the incubation chamber 12 into the rearing chamber 13 through the overflow pipe 111, due to the influence of the water flow direction and the tilt angle of the filter screen 1312, most of the dead eggs, metabolic waste, and other impurities will accumulate with the water flow towards the side of the filter screen 1312 away from the overflow pipe 111. The baffle 13121 set on the side of the filter screen 1312 away from the overflow pipe 111 extends along the edge of the filter screen 1312, forming a barrier structure.

[0033] When the filter screen 1312 is tilted and submerged as the overflow pipe 111 descends, impurities slide along the surface of the filter screen 1312 to the far end with the water flow. The baffle 13121 intercepts the impurities to prevent them from sliding from the edge of the filter screen 1312 to the bottom of the aquaculture chamber 13. When the filter screen 1312 is lifted off the water surface as the overflow pipe 111 rises, the intercepted impurities will be concentrated at the far end of the filter screen 1312, making it easier for staff to clean them directly.

[0034] By setting up baffle 13121, impurities are difficult to accumulate at the bottom of the breeding chamber 13, preventing dead eggs from rotting and polluting the water or clogging the breeding space, thus providing a clean growth environment for the fish fry below the filter screen 1312. Utilizing the characteristics of water flow and the baffle 13121, impurities are concentrated at the far end of the filter screen 1312, improving the efficiency of impurity removal and reducing the frequency of manual cleaning. Baffle 13121 prevents impurities from flowing into the bottom of the breeding chamber 13, avoiding direct contact between the fish fry and pollutants, reducing the risk of disease infection in the fish fry, achieving the goal of optimal breeding of salmon fry, and ensuring the stability of water quality in the hatching pond 1, providing a clean environment for the entire process from salmon egg hatching to fry cultivation.

[0035] like Figures 1 to 7 and Figure 10 As shown: The top of the hatching pool 1 is provided with a vertical lead screw 14 and a guide rod 15. The mounting frame 1311 is provided with a support frame 13111. The support frame 13111 is sleeved on the lead screw 14 and threadedly engaged with it. The support frame 13111 is sleeved on the guide rod 15 and slidably engaged with it.

[0036] An installation cavity 16 is provided on the outer wall of the incubation pool 1, and a drive motor 161 for driving the lead screw 14 to rotate is installed in the installation cavity 16. When the drive motor 161 on the incubation pool 1 drives the lead screw 14 to rotate, the support frame 13111 moves up and down along the lead screw 14 under the action of threaded transmission. The guide rod 15 restricts the displacement of the support frame 13111 through sliding fit, ensuring that it rises and falls stably along the height direction of the incubation pool 1. Since the mounting bracket 1311 is fitted onto the overflow pipe 111, the lifting and lowering of the support bracket 13111 synchronously drives the overflow pipe 111 to slide along the height of the hatching tank 1, thereby realizing the linkage adjustment between the overflow pipe 111 and the filter screen 1312. That is, when the screw 14 rotates to raise the overflow pipe 111, the mounting bracket 1311 will also drive the filter screen 1312 to rise synchronously, so that the filter screen 1312 and the overflow pipe 111 maintain a fixed height, ensuring that when the water flow carries the fish fry into the breeding chamber 13, the impact force of impurities is controlled within the range that the fish fry can withstand, and avoiding the death of fish fry due to the impact of water flow.

[0037] The precise adjustment of the overflow pipe 111 height is achieved through the cooperation of the lead screw 14 and the guide rod 15, which improves the accuracy of the water level difference control between the hatching chamber 12 and the rearing chamber 13, meeting the strict requirements of salmon egg hatching for water flow cycle changes. The drive motor 161 can be programmed to preset the lifting and lowering rhythm of the overflow pipe 111, simulating the natural water flow fluctuation pattern and reducing the intensity of manual intervention. The guide rod 15 guides the sliding of the support frame 13111, avoiding swaying and deviation when the overflow pipe 111 is raised or lowered, ensuring the accurate linkage angle between the filter screen 1312 and the overflow pipe 111, and ensuring the efficiency of impurity interception and fry separation. The self-locking characteristic of the lead screw 14 transmission can keep the overflow pipe 111 stably maintained at any adjustable height, preventing positional deviation caused by water flow impact, and providing continuous and stable water flow power and impurity separation conditions for the hatching process.

[0038] like Figures 1 to 7 and Figure 10 As shown: There are rotating shafts 13122 on both sides of the filter screen 1312. The rotating shafts 13122 are rotatably mounted on the mounting bracket 1311. A gear 13123 is sleeved on the rotating shaft 13122. A vertical rack 17 is fixedly connected to the inner wall of the breeding chamber 13. The rack 17 is meshed with the gear 13123.

[0039] When the mounting frame 1311 slides along the height of the hatching tank 1 with the overflow pipe 111, the filter screen 1312 moves on the mounting frame 1311 via the rotating shaft 13122. At this time, the gear 13123 rolls along the rack 17, causing the filter screen 1312 to rotate around the rotating shaft 13122. When the overflow pipe 111 descends, the mounting frame 1311 causes the filter screen 1312 to move downwards, and the gear 13123 rolls on the rack 17, causing the filter screen 1312 to rotate away from the overflow pipe 111 and tilt to be submerged in the water. When the overflow pipe 111 rises, the mounting frame 1311 causes the filter screen 1312 to move upwards, and the gear 13123 rolls in the opposite direction, causing the filter screen 1312 to rotate towards the overflow pipe 111 and be lifted off the water surface.

[0040] The mechanical meshing of the filter screen 1312 and the overflow pipe 111 is linked, eliminating the need for an additional drive device. This results in a simple structure, stable transmission, and reduced potential equipment failure points. The meshing transmission between the gear 13123 and the rack 17 provides precise angle control, ensuring that the filter screen 1312 maintains a preset rotation angle at different overflow pipe 111 heights. This prevents jamming or deviation during the rotation of the filter screen 1312, ensuring the reliability of the device during long-term operation. The mechanical linkage of the gear 13123 and the rack 17 enables the filter screen 1312 to rotate synchronously with the overflow pipe 111, achieving full automation of the process of impurity interception, fry separation, and filter screen 1312 cleaning. This reduces the complexity of manual operation while improving the continuity and stability of the salmon egg hatching to fry cultivation process.

[0041] like Figures 1 to 3 As shown: A distance sensor 18 is installed on the incubation pool 1 to monitor the movement distance of the support frame 13111.

[0042] When the drive motor 161 drives the lead screw 14 to rotate, causing the support frame 13111 to rise and fall along the height of the incubation tank 1, the distance sensor 18 continuously emits detection signals (such as infrared, ultrasonic, etc.). By measuring the time difference or phase difference between the signal transmission and reception, the real-time distance between the support frame 13111 and the sensor is calculated, and this distance data is transmitted to the back-end control system. The back-end control system adjusts the rotation direction and speed of the drive motor 161 in real time according to the preset linkage parameters of the overflow pipe 111 height and the filter screen 1312 rotation angle, ensuring that the support frame 13111 drives the overflow pipe 111 and the filter screen 1312 to accurately reach the target position, achieving precise coordination between the lifting of the overflow pipe 111 and the rotation of the filter screen 1312.

[0043] By monitoring the movement distance of the support frame 13111 in real time, closed-loop control of the overflow pipe 111 height is achieved, avoiding water level adjustment deviations caused by transmission errors of the lead screw 14. This significantly improves the water level difference control accuracy between the hatching chamber 12 and the rearing chamber 13, better meeting the stringent requirements of salmon egg hatching for water flow cycle changes. After the sensor feeds back the position data of the support frame 13111 to the control system, the lifting and lowering rhythm of the overflow pipe 111 can be automatically adjusted according to the hatching stage, simulating different water flow states without manual intervention, reducing operational complexity. When the support frame 13111 moves beyond the preset safe distance, the sensor can trigger a system alarm and stop the drive motor 161, preventing excessive lifting and lowering of the overflow pipe 111 from causing equipment damage or water loss, providing safety assurance for the device operation, and improving the automation level and reliability of the salmon egg hatching to larval rearing process.

[0044] like Figures 3 to 7 and Figure 9 As shown: The incubation chamber 12 is equipped with a rotatable incubation tray 121. The bottom of the incubation tray 121 is inclined, and multiple ventilation holes 1211 are arranged in a rectangular row on the incubation tray 121.

[0045] When the hatching tray 121 rotates, the inclined bottom causes the fish eggs to roll slowly along the tray surface under the combined action of centrifugal force and gravity, preventing the fish eggs from accumulating and sticking together; the ventilation hole 1211 allows water and oxygen to pass through, and together with the aeration component 123 or water nozzle 122 at the bottom of the hatching chamber 12, the water can be connected at the top and bottom of the tray. The water below flows upward through the ventilation hole 1211 and impacts the fish eggs, while the metabolites and dead eggs above are discharged from the edge of the tray with the water flow, realizing the dynamic disturbance of the fish eggs and water quality exchange.

[0046] The tilted and rotating hatching tray 121 keeps the salmon sinking eggs in a suspended and bouncing state through mechanical movement, effectively solving the problems of egg adhesion and lack of oxygen caused by sinking to the bottom in traditional static hatching, and improving the hatching success rate. The rectangular rows of ventilation holes 1211 ensure that the water flow penetrates the tray evenly, providing a stable dissolved oxygen environment for the eggs, while avoiding damage to the egg membrane due to excessive local water flow. During the rotation of the hatching tray 121, the tilt angle guides the eggs to move naturally towards the overflow pipe 111, which works in conjunction with the water level regulation of the overflow pipe 111, making it easier for the hatched fry to enter the rearing chamber 13 with the water flow, reducing human intervention. The centrifugal force generated during the rotation can cause metabolic waste and attached impurities on the surface of the eggs to fall off and be discharged through the ventilation holes 1211 or the edge of the tray, maintaining the cleanliness of the water in the hatching chamber 12 and providing a suitable physical and ecological environment for the development of salmon eggs.

[0047] like Figures 3 to 8 As shown: Multiple nozzles 122 are provided on the inner wall of the incubation chamber 12. The nozzles 122 are used to spray water onto the surface of the incubation tray 121.

[0048] When nozzle 122 is turned on, multiple streams of water impact the inclined surface of the hatching tray 121 at a preset angle. The impact force of the water flow drives the fish eggs to roll slightly on the tray surface. At the same time, the water flow forms a circulation path between the hatching tray 121 and the hatching chamber 12. Some water seeps downward through the vent holes 1211 on the hatching tray 121, creating convection currents above and below the tray. The other part of the water carries fish egg metabolites and impurities and overflows from the edge of the tray, entering the rearing chamber 13 through the overflow pipe 111. The spray direction and intensity of nozzle 122 can be adjusted according to the hatching stage. A weaker water flow is used in the early stage of fish egg hatching to avoid damaging the egg membrane. After the fry hatch, the water flow intensity is increased to promote the movement of the fry towards the overflow port.

[0049] The multi-angle water flow impact causes the fish eggs to continuously roll on the hatching tray 121, avoiding adhesion and oxygen deficiency caused by sedimentation, thus significantly improving the hatching rate. The water circulation accelerates the water renewal in the hatching chamber 12, promptly removing metabolic waste and dead eggs, reducing the accumulation of harmful substances, and maintaining water quality cleanliness. The synergistic effect of the nozzle 122 and the tilted hatching tray 121 ensures that the fish eggs are evenly exposed to oxygen-rich water during the rolling process, optimizing the hatching environment. In addition, the adjustable water flow intensity adapts to the needs of different developmental stages of salmon, ensuring the survival rate of fish eggs while promoting the development of the fry's natural swimming ability, laying a healthy foundation for subsequent breeding stages.

[0050] like Figures 3 to 9 As shown: The bottom of the incubation chamber 12 is located below the incubation tray 121 and is equipped with an aeration component 123, which has multiple aeration heads 1231 distributed on it.

[0051] With the aeration assembly 123 and multiple aeration heads 1231, the aeration heads 1231 continuously generate tiny bubbles. As the bubbles rise, they drive the water flow below the hatching tray 121 upwards, forming an upward water convection. When the water flows over the rotating hatching tray 121, it comes into contact with the fish eggs on the surface of the tray. On the one hand, the micro-disturbance caused by the bursting of bubbles causes the fish eggs to jump slightly, preventing them from sinking and sticking together. On the other hand, dissolved oxygen is delivered to the area around the fish eggs, meeting their high dissolved oxygen hatching requirements. At the same time, some metabolic waste and dead eggs carried by the rising water flow overflow from the edge of the hatching tray 121 and enter the rearing chamber 13 through the overflow pipe 111, thus purifying the water.

[0052] Bottom aeration via aeration heads 1231 specifically increases dissolved oxygen levels in the hatching tray 121 area, providing ample oxygen for salmon egg hatching and preventing developmental abnormalities or death due to oxygen deficiency. The bubble-driven water flow convection, combined with the tilting and rotation of the hatching tray 121, keeps the eggs dynamically suspended under the combined effects of buoyancy, water flow impact, and gravity, effectively solving the problem of sinking eggs easily accumulating. The water circulation generated by aeration accelerates material exchange within the hatching chamber 12, promptly removing harmful substances produced by egg metabolism and dead eggs, reducing the risk of diseases such as saprolegniasis. The layout of the bottom aeration heads 1231 ensures uniform dissolved oxygen distribution, preventing the formation of localized oxygen-deficient areas and providing a stable and suitable aquatic environment for salmon egg development, thereby improving overall hatching efficiency and fry health.

[0053] like Figures 1 to 7 As shown: A cleaning head 19 for backwashing the filter screen 1312 is provided on the side of the breeding chamber 13 away from the overflow pipe 111.

[0054] When the filter screen 1312 rises with the overflow pipe 111 to the point of being detached from the water surface, the cleaning head 19 sprays water onto the side of the filter screen 1312 away from the overflow pipe 111. The direction of the water flow is opposite to the direction of impurity interception. The impact force of the water flow is used to peel off impurities such as dead eggs and metabolites attached to the pores or surface of the filter screen 1312, thus making it convenient for staff to collect impurities.

[0055] The backwashing function facilitates the removal of impurities attached to the filter screen 1312, avoiding frequent manual disassembly and cleaning, reducing labor intensity and improving operational safety; it maintains the permeability of the filter screen 1312, preventing impurities from clogging the mesh and affecting water flow speed and fish fry passage efficiency; it reduces the residence time of impurities in the rearing chamber 13, preventing rotting and water pollution; it maintains long-term clean operation in the hatching tank 1, providing a growth environment free from impurities for salmon fry, while ensuring the filter screen 1312's continuous and efficient separation capability of fish fry and impurities.

[0056] like Figures 1 to 7 As shown: A method for selecting and hatching salmon eggs, applied to the aforementioned integrated salmon egg selection and hatching device, includes the following steps: S1. Place salmon eggs in the hatching chamber 12 and adjust the overflow pipe 111 to the initial height so that the water level in the hatching chamber 12 is higher than that in the culture chamber 13, thus creating natural overflow power.

[0057] S2. When it is necessary to discharge metabolites and impurities, the overflow pipe 111 is lowered. The water flow carries dead eggs, impurities and hatched fry into the breeding chamber 13 through the overflow pipe 111. The fry swim through the gap between the filter screen 1312 and the inner wall of the breeding chamber 13 to the bottom of the filter screen 1312. The dead eggs and impurities are intercepted by the filter screen 1312.

[0058] S3. When it is necessary to clean the impurities in the breeding chamber 13, the overflow pipe 111 is raised. At this time, the filter screen 1312 will rotate towards the overflow pipe 111 and leave the water surface, exposing the intercepted impurities above the water surface for centralized collection. At the same time, the hatching chamber 12 turns into a water storage state and temporarily stops overflowing.

[0059] S4. Before the filter screen 1312 is raised with the overflow pipe 111, bait is placed below the filter screen 1312 in the breeding chamber 13 to guide the fish fry to swim below the filter screen 1312, so as to avoid the fish fry remaining on the filter screen 1312.

[0060] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An integrated device for selecting and hatching salmon eggs, comprising an incubation tank (1), characterized in that, A partition (11) is provided in the center of the hatching pool (1), which divides the hatching pool (1) into a hatching chamber (12) and a breeding chamber (13). An overflow pipe (111) that can slide along the height direction of the hatching tank (1) is provided on the partition (11). A filter assembly (131) is provided inside the breeding chamber (13). The filter assembly (131) includes a mounting bracket (1311) sleeved on the overflow pipe (111) and a rotatable filter screen (1312) is provided on the mounting bracket (1311). A gap is left between the end of the filter screen (1312) away from the overflow pipe (111) and the inner wall of the breeding chamber (13) to allow the fish fry to swim through; When the overflow pipe (111) rises, the filter screen (1312) will rotate in the direction of the overflow pipe (111); When the overflow pipe (111) descends, the filter screen (1312) will rotate away from the overflow pipe (111); A baffle (13121) extending along the edge of the filter screen (1312) is provided on the side away from the overflow pipe (111). The top of the hatching pool (1) is provided with a vertical screw rod (14) and a guide rod (15). The mounting frame (1311) is provided with a support frame (13111). The support frame (13111) is sleeved on the screw rod (14) and threadedly engaged with it. The support frame (13111) is sleeved on the guide rod (15) and slidably engaged with it. The filter screen (1312) is provided with a rotating shaft (13122) on both sides. The rotating shaft (13122) is rotatably mounted on the mounting bracket (1311). A gear (13123) is sleeved on the rotating shaft (13122). A rack (17) in a vertical position is fixedly connected to the inner wall of the breeding chamber (13). The rack (17) meshes with the gear (13123).

2. The integrated salmon egg breeding and hatching device according to claim 1, characterized in that, The hatching pool (1) is equipped with a distance sensor (18) to monitor the movement distance of the support frame (13111).

3. A salmon egg breeding and hatching integrated device according to any one of claims 1 or 2, characterized in that, The incubation chamber (12) is equipped with a rotating incubation tray (121). The bottom of the incubation tray (121) is inclined, and multiple ventilation holes (1211) are arranged in a rectangular row on the incubation tray (121).

4. The integrated salmon egg breeding and hatching device according to claim 3, characterized in that, Multiple nozzles (122) are provided on the inner wall of the incubation chamber (12), and the nozzles (122) are used to spray water onto the surface of the incubation tray (121).

5. The integrated salmon egg breeding and hatching device according to claim 3, characterized in that, The bottom of the incubation chamber (12) is located below the incubation tray (121) and an aeration assembly (123) is provided. Multiple aeration heads (1231) are distributed on the aeration assembly (123).

6. The integrated salmon egg breeding and hatching device according to claim 1, characterized in that, A cleaning head (19) for backwashing the filter screen (1312) is provided on the side of the breeding chamber (13) away from the overflow pipe (111).

7. A method for selecting and hatching salmon eggs, applied to an integrated salmon egg selection and hatching device as described in any one of claims 1-6, characterized in that, It includes the following steps: S1. Place salmon eggs in the hatching chamber (12), adjust the overflow pipe (111) to the initial height, so that the water level in the hatching chamber (12) is higher than that in the culture chamber (13), forming a natural overflow force; S2. When it is necessary to discharge metabolites and impurities, the overflow pipe (111) is lowered. The water flow carries dead eggs, impurities and hatched fry into the breeding chamber (13) through the overflow pipe (111). The fry swim through the gap between the filter screen (1312) and the inner wall of the breeding chamber (13) to the bottom of the filter screen (1312). The dead eggs and impurities are intercepted by the filter screen (1312). S3. When it is necessary to clean the impurities in the breeding chamber (13), the overflow pipe (111) is raised. At this time, the filter screen (1312) will rotate towards the overflow pipe (111) and leave the water surface, exposing the intercepted impurities above the water surface for centralized collection. At the same time, the hatching chamber (12) will turn into a water storage state and temporarily stop overflowing. S4. Before the filter screen (1312) is raised with the overflow pipe (111), bait is placed below the filter screen (1312) in the breeding chamber (13) to guide the fish fry to swim below the filter screen (1312) and avoid the fish fry remaining on the filter screen (1312).

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