A device for hatching and breeding marine floating fish eggs with micro-water flow

Abstract

The present application belongs to the technical field of fish egg hatching, and discloses a hatching device which comprises a water storage box and a hatching cylinder arranged in the water storage box and forming four diagonal cavities with the inner cavity of the water storage box, a water tank opened on the surface of the hatching cylinder for communicating with the diagonal cavities, a drainage cylinder arranged in the middle of the inner cavity of the hatching cylinder and connected to an external water circulation system, a water guide plate arranged on the inner cavity wall of the hatching cylinder, a first ball valve and a second ball valve arranged at the diagonal positions on the two sides of the water storage box respectively, wherein water is injected into the diagonal cavities through the first ball valve and the second ball valve, the water is injected into the hatching cylinder through the water tank, and the water flow is guided by the water guide plate to form a circulating flow. The complete set of the hatching device can be used for hatching about 100,000 to 200,000 fertilized marine buoyant fish eggs, and the hatching rate can reach more than 85%, and the device has the advantages of high hatching rate and high survival rate when hatching relatively weak buoyant fish eggs.

Description

Technical Field

[0001] This invention belongs to the field of fish egg hatching technology, specifically a hatching and seedling raising device for marine floating fish eggs with micro-current. Background Technology

[0002] my country is a major aquaculture country, with aquaculture production accounting for over 70% of the country's total aquatic product output. The supply of fish fry is a crucial foundation for the healthy and sustainable development of the aquaculture industry. Currently, most major freshwater fish species can be artificially bred on a large scale and commercially, ensuring a stable and continuous supply of fry to the market. However, most current aquaculture hatching equipment is designed primarily for freshwater fish hatching.

[0003] With the improvement of people's living standards, traditional freshwater aquatic products can no longer meet people's demand for aquatic products. Compared with most freshwater aquatic products, marine aquatic products have the advantages of less odor, rich nutrition, and delicious taste, and are gradually favored by consumers. At the same time, the development of the marine aquarium industry has increased the pressure on wild marine fish populations, making it urgent to conduct research on artificial breeding technology for popular species. However, the vast majority of marine edible fish and marine ornamental fish still rely on wild fishing. Taking marine ornamental fish as an example, currently only about 30 species of marine ornamental fish have been artificially bred domestically and internationally, while hundreds of species of marine ornamental fish are involved in the aquarium trade. A major technical bottleneck preventing the artificial breeding of a wide range of species is the lack of suitable incubation and seedling raising equipment for artificial breeding. Marine fish fry are more fragile than freshwater fish fry, requiring gentler water currents, more oxygen-rich water, and a more stable environment. Therefore, a micro-current marine planktonic fish egg hatching and rearing device is needed to increase the number and hatching rate of eggs per batch, reduce fry damage during hatching and transfer, and improve fry survival rate during rearing. This device can help solve the current challenges in the artificial breeding of high-value marine economic and ornamental fish.

[0004] Most incubation devices currently on the market are designed for freshwater fish eggs. Freshwater fish eggs are generally large in diameter with tough membranes, and the newly hatched fry are relatively large, capable of swimming independently and actively feeding on exogenous nutrients. They are also resilient and not sensitive to changes in the external environment or mechanical damage caused by water flow. However, many marine fish eggs, some freshwater fish eggs, and eel eggs are not only small in diameter and sensitive to changes in the external environment, but the newly hatched fry are also less resilient and have poor independent swimming ability. They require a certain water flow environment to assist them in hunting, but cannot withstand excessively strong or turbulent water flow that could damage them. Incubation devices for freshwater fish eggs do not take into account the mechanical damage caused to the fry by driving sources such as air bubbles. Therefore, when these devices are used for the incubation and fry rearing of the aforementioned more delicate fish, it can lead to a large number of newly hatched fry deaths, resulting in unsatisfactory results. Meanwhile, most incubation equipment is also unable to handle subsequent seedling cultivation, resulting in significant losses for some species during the transfer process after hatching. This directly impacts the success rate and economic income of seedling growers. For example, Chinese Patent 201820754685.2, published on December 14, 2018, discloses a submersible egg fry incubation device and equipment, which includes an incubation tank, a drainage tank, a perforated plate, an aeration disc, and a blower. This device utilizes the combined effects of water flow and airflow to prevent fish eggs from sticking together and to increase dissolved oxygen in the water, thereby improving the hatching rate of fish eggs. However, this device and equipment use airflow for incubation, making it difficult to precisely control the water flow speed. Therefore, it is difficult to artificially incubate some smaller diameter fish eggs, and the water flow driven by the bubbles can also cause mechanical damage to the weaker newly hatched fry. In summary, given the shortcomings of existing incubation devices, there is an urgent need for a fish fry incubation device that is water-driven, has controllable flow rate and water quality, integrates incubation and seedling raising, and can reduce mechanical damage to fry in the container. However, no reports on such devices have been found to date. Summary of the Invention

[0005] The purpose of this invention is to provide a hatching and seedling raising device for micro-current marine floating fish eggs, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a micro-current marine buoyant fish egg hatching and rearing device, comprising a water storage box, and further comprising,

[0007] The incubation tube is located inside the water storage box and forms four diagonal cavities with the inner cavity of the water storage box.

[0008] Water tanks, which are formed on the surface of the incubation tube for connecting and diagonal cavities,

[0009] A drain pipe is located in the middle of the incubation tank and connected to an external water circulation system.

[0010] A water guide plate is installed on the inner wall of the incubation cylinder.

[0011] The first ball valve and the second ball valve are respectively located at opposite corners on both sides of the water storage box;

[0012] Water is injected into the diagonal cavity through the first ball valve and the second ball valve. The water is injected into the incubation cylinder through the water tank, and the water flow is guided by the water guide plate to form a circulation.

[0013] Preferably, the first ball valve and the second ball valve are respectively connected to the upper left and lower right diagonal cavities in the water storage box, and the four diagonal cavities are independent of each other.

[0014] Preferably, a ball screw is provided at the top of the inner cavity of the incubation tube, the ball screw is driven to connect to a slider, the slider is connected to a support frame, switches are provided on the upper and lower sides of the inner wall of the support frame for driving a motor installed outside the water storage box, and a floating structure is provided in the middle of the support frame.

[0015] Among them, the motor adjusts the water flow area on the surface of the drainage cylinder.

[0016] Preferably, the drainage cylinder includes nylon cloth, a structural frame for supporting the nylon cloth, and water-blocking plates attached to the inner side of the structural frame, wherein the motor is drivenly connected to the water-blocking plates.

[0017] Preferably, the included angle of the cross section at the connection between the water guide plate and the incubation cylinder is adjustable.

[0018] Preferably, the water guide plate includes an arc-shaped plate and a straight plate.

[0019] Preferably, the incubation cylinder is an irregular cylinder with its top cut off at an arc of °.

[0020] Preferably, both the water storage box and the incubation cylinder are made of transparent acrylic material.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The incubation device of this invention can hold approximately 100,000 to 200,000 fertilized marine buoyant fish eggs for incubation, with a hatching rate of over 85%. It maintains a high hatching and survival rate even when incubating relatively delicate buoyant fish eggs. The weak water flow created by the water guide plate and water storage box drives the incubation of the fish eggs. Within the cylindrical container, the fish eggs and newly hatched larvae remain suspended, avoiding contact with the side walls and air bubbles, thus preventing mechanical damage to the delicate eggs and larvae. This device can be used for the artificial incubation of sensitive and fragile marine buoyant fish eggs. Simultaneously, it simulates the floating state of larvae in nature, suitable for the feeding and growth of newly hatched marine fish larvae. This means that after hatching, there is no need to transfer the newly hatched larvae; larval rearing can begin immediately, significantly reducing losses during the transfer process.

[0023] 2. The device of this invention is directly connected to the circulating filtration system, which reduces the impact of water quality on the hatching and seedling raising process, facilitates the hatching of fish eggs and maintains good water quality for seedling raising. In addition, the device is transparent, making it easy to observe the development of fish eggs, the density of food organisms, and the feeding of fish fry during the seedling raising process.

[0024] 3. The present invention also designs the structure of the drainage cylinder so that its water flow area can be changed in real time, thereby changing the negative pressure state on its surface. This prevents fish eggs from being adsorbed on its surface when the water flow rate is relatively low, and allows the adsorbed fish eggs to fall off, preventing them from being further mechanically damaged, thus effectively ensuring the survival rate of the fish eggs. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the overall structure of the present invention;

[0026] Figure 2 For the present invention Figure 1 Enlarged view of part A;

[0027] Figure 3 This is a side view of the present invention;

[0028] Figure 4 This is a schematic diagram of the drainage cylinder of the present invention.

[0029] In the diagram: 1. Water storage box; 2. Incubation cylinder; 3. Water tank; 4. First ball valve; 5. Second ball valve; 6. Drainage cylinder; 61. Nylon cloth; 62. Structural frame; 63. Water-blocking plate; 7. Water guide plate; 8. Ball screw; 81. Slider; 9. Support frame; 10. Switch; 11. Floating structure; 12. Motor. Detailed Implementation

[0030] 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.

[0031] like Figures 1 to 4 As shown, this embodiment of the invention provides a hatching and rearing device for micro-current marine buoyant fish eggs, including a water storage box 1, and further including,

[0032] The incubation cylinder 2 is located inside the water storage box 1, forming four diagonal cavities with the inner cavity of the water storage box 1.

[0033] Water tank 3, which is formed on the surface of incubation cylinder 2 for communication and diagonal cavities,

[0034] The drain cylinder 6 is located in the middle of the inner cavity of the incubation cylinder 2 and is connected to the external water circulation system.

[0035] Water guide plate 7 is installed on the inner wall of the incubation cylinder 2.

[0036] The first ball valve 4 and the second ball valve 5 are respectively located at opposite corners on both sides of the water storage box 1;

[0037] Water is injected into the diagonal cavity through the first ball valve 4 and the second ball valve 5. The water is injected into the incubation cylinder 2 through the water tank 3, and the water flow is guided by the water guide plate 7 to form a circulation.

[0038] like Figure 1-4 As shown, this device can incubate the eggs of eels, damselfish, spiny eels, and Napoleon wrasse. The eggs are placed in the incubation cylinder 2. The water flow rate is adjusted by the first ball valve 4 and the second ball valve 5. The water is then processed by the water tank 3 and introduced into the incubation cylinder 2. A guide plate 7 assists in guiding the flow, creating a circular water flow inside. This prevents the eggs from being easily adhered to the drain cylinder 6, allowing them to float with the circular water flow. After the eggs hatch into fry, the water flow rate of the ball valves can be increased according to the specific needs of the fry species, and the fry can be fed the necessary food organisms to help them swim and capture food.

[0039] The incubation container 2 is made of transparent material, allowing staff to directly observe the development of fish eggs, feeding behavior of fry, food density, water flow, and other conditions inside the incubation container, and make timely adjustments accordingly. This material is acrylic.

[0040] The top of the incubation container 2 is cut off at a 45° arc to facilitate operation of the inside of the incubation container from above.

[0041] The incubation tube 2 is 80cm long, 51.1cm high, and has a side diameter of 60cm;

[0042] The water storage box 1 is made of transparent acrylic material, and its water inlet pipe is a DN25mm PVC pipe.

[0043] Among them, the first ball valve 4 and the second ball valve 5 are respectively connected to the upper left and lower right diagonal cavities in the water storage box 1, and the four diagonal cavities are independent of each other;

[0044] The independent diagonal cavities are filled with water without stopping the water filling process. The water pressure in the diagonal cavities forces the water into the incubation cylinder 2, thus creating a water flow. The two diagonal cavities work together to form a circular water flow.

[0045] Among them, the top of the inner cavity of the incubation tube 2 is also provided with a ball screw 8, the ball screw 8 is driven to connect to a slider 81, the slider 81 is connected to a support frame 9, the upper and lower sides of the inner wall of the support frame 9 are provided with switches 10 for driving the motor 12 installed outside the water storage box 1, and the middle part of the support frame 9 is also provided with a floating structure 11.

[0046] like Figure 1 and 2 As shown, the support frame 9 is mounted on a guide rod and can move freely up and down without being washed away by the water flow. The support frame 9 can be adjusted to a predetermined height by the ball screw 8. When the water level rises, the floating structure 11 is buoyed upward and touches the switch 10 located at the top of the support frame 9. Then the switch 10 controls the motor to rotate forward and adjusts to reduce the water flow of the drain pipe 6, thereby causing the liquid level to drop. When the liquid level drops, the floating structure 11 moves downward and touches the switch 10 located below the support frame 9, causing the motor to rotate in reverse and adjust to reduce the water flow of the drain pipe 6, thereby causing the liquid level to rise. In this way, the liquid level can always be kept in a dynamic equilibrium state.

[0047] Among them, the motor 12 adjusts the water flow area on the surface of the drain cylinder 6.

[0048] Among them, the drainage cylinder 6 includes nylon cloth 61, a structural frame 62 for supporting the nylon cloth 61 and a water-blocking rib plate 63 attached to the inner side of the structural frame 62, and the motor 12 is connected to the water-blocking rib plate 63 for transmission.

[0049] like Figure 4 As shown, the structural skeleton 62 is arranged in an equidistant ring array, with gaps between adjacent structural skeletons 62. Water can seep into the interior of the drainage cylinder 6 through these gaps. The water-blocking plates 63 located on the inner side can be rotated to adjust their overlap area with the gaps. Therefore, when the motor drives the water-blocking plates 63 to rotate, it can directly interfere with the water seepage rate. Increasing the overlap area between the water-blocking plates 63 and the gaps slows down the seepage rate, while decreasing the overlap area speeds up the seepage rate. At the same time, by adjusting the gap area, the blocked part loses negative pressure, so the small number of fish eggs originally adsorbed there will fall off due to the disappearance of negative pressure and the combined effect of water flow.

[0050] Among them, the included angle of the cross section at the connection between the water guide plate 7 and the incubation cylinder 2 is adjustable;

[0051] This adjustable angle is mainly determined by the water level in incubation tank 2. When the water level is relatively high, it is necessary to make the water at a higher level flow, so the angle with the tangent can be appropriately reduced. When the water level is relatively low, this angle can be appropriately increased to avoid the water flow directly causing unevenness on the liquid surface and turbulence.

[0052] Among them, the water guide plate 7 includes an arc-shaped plate and a straight plate;

[0053] Both curved and straight plates are adaptable options that can be chosen according to different flow guidance needs. Furthermore, both types of plates are easy to process and have low costs.

[0054] Working principle and usage process:

[0055] This application simulates the continuous floating state of fish eggs in nature by creating a circular water flow in the incubation tube 2, which in turn causes the fish eggs to move with the water flow. The water flow helps the fry to hunt for food, while the water in the drain tube 6 permeates outward, thus forming a water cycle. This allows for oxygenation and water purification. The drain tube 6 can filter out the fish eggs, preventing them from being discharged out of the device. Furthermore, the adjustable drain tube 6 changes the negative pressure on its surface, allowing the adsorbed fish eggs to fall off from above with the help of the water flow, preventing the fish eggs from being adsorbed and resulting in a low survival rate.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] 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 hatching and rearing device for micro-current marine floating fish eggs, comprising a water storage box (1), characterized in that: It also includes, The incubation tube (2) is located inside the water storage box (1) and forms four diagonal cavities with the inner cavity of the water storage box (1). Water tank (3), which is opened on the surface of incubation tube (2) for connecting and diagonal cavities, A drain cylinder (6) is located in the middle of the inner cavity of the incubation cylinder (2) and is connected to the external water circulation system. A water guide plate (7) is installed on the inner wall of the incubation cylinder (2). The first ball valve (4) and the second ball valve (5) are respectively located at opposite corners on both sides of the water storage box (1); Water is injected into the diagonal cavity through the first ball valve (4) and the second ball valve (5), and the water is injected into the incubation cylinder (2) through the water tank (3). The water flow is guided by the water guide plate (7) to form a circulation. The first ball valve (4) is connected to the lower right diagonal cavity in the water storage box (1), and the second ball valve (5) is connected to the upper left diagonal cavity in the water storage box (1). The four diagonal cavities are independent of each other. The independent diagonal cavities are filled with water without stopping the water injection. The water pressure in the diagonal cavities is used to push the water into the incubation cylinder. The upper and lower diagonal cavities can cooperate to form a ring-shaped water flow state. The top of the inner cavity of the incubation tube (2) is also provided with a ball screw (8), which drives a slider (81). The slider (81) is connected to a support frame (9). Switches (10) are provided on the upper and lower sides of the inner wall of the support frame (9) to drive a motor (12) installed outside the water storage box (1). A floating structure (11) is also provided in the middle of the support frame (9). Among them, the motor (12) adjusts the water flow area on the surface of the drain cylinder (6); The drainage cylinder (6) includes nylon cloth (61), a structural frame (62) for supporting the nylon cloth (61), and a water-blocking plate (63) attached to the inner side of the structural frame (62). The motor (12) is connected to the water-blocking plate (63) in a transmission. The angle between the cross section of the water guide plate (7) and the incubation cylinder (2) is adjustable.

2. The incubation and seedling raising device for micro-current marine buoyant fish eggs according to claim 1, characterized in that: The water guide plate (7) includes an arc-shaped plate and a straight plate.

3. The incubation and seedling raising device for micro-current marine buoyant fish eggs according to claim 1, characterized in that: The incubation tube (2) is an irregular cylinder with a 45° arc cut off from the top.

4. The incubation and seedling raising device for micro-current marine buoyant fish eggs according to claim 1, characterized in that: Both the water storage box (1) and the incubation tube (2) are made of transparent acrylic material.

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