A device for hatching channel catfish

Abstract

This utility model discloses a channel catfish hatching device, relating to the technical field of hatching equipment. The utility model includes a hatching chamber with an operating table. Multiple cavities are arranged on the operating table surface, and hatching components are selectively placed in these cavities. Each hatching component consists of a flowing water hatching tank and multiple hatching troughs. An overflow port is provided on the side wall of the flowing water hatching tank, and a fry discharge pipe is provided on the end wall of the flowing water hatching tank. This utility model sets up independent flowing water hatching tanks on the operating table, draining water through the drain pipe and releasing fish through the fry discharge troughs. Each flowing water hatching tank forms an independent hatching environment. The farmer only needs to periodically inspect the hatching chamber, shake the hatching troughs when necessary, and remove the plugs when releasing fish, simplifying the hatching process and operation. It also solves the problem that existing devices cannot be used to hatch different batches of channel catfish fertilized eggs.

Description

Technical Field

[0001] This utility model relates to the field of hatching equipment technology, and in particular to a hatching device for spotted catfish. Background Technology

[0002] The channel catfish (Catechus spp.) is a large freshwater fish. With a meat yield of at least 75.1%, it is prized for its delicious flesh, rapid growth, and strong disease resistance, making it a high-value and economically valuable species. The large-scale production of channel catfish fry has significantly boosted the aquaculture industry. Aquaculture areas and acreage have continued to expand, the industry has grown significantly, and aquaculture models have gradually shifted towards commercialization. Channel catfish typically reproduce in three ways: natural reproduction, natural spawning combined with artificial incubation, and artificial spawning induction. Natural spawning supplemented with artificial incubation has proven to be the most effective method. Therefore, in large-scale channel catfish farming, males and females are usually paired during the breeding season through forced mating, allowing for natural spawning and fertilization. The fertilized eggs are usually clustered and somewhat sticky, adhering to the pond walls, necessitating harvesting by aquaculture workers. Natural spawning differs from artificial insemination. Natural spawning results in different batches of fertilized eggs, requiring frequent collection and artificial incubation by fish farmers. Channel catfish hatch in 5-6 days in warm water (26℃-28℃). Current methods for harvesting in elevated ponds often use netting. For example, patent number 202011384521.3, entitled "A Fertilized Fish Egg Hatching Device," describes a device comprising a rotary drive mechanism, a rotary lifting mechanism, a culture ball, a reflux mechanism, a reciprocating drive mechanism, an intermittent pumping mechanism, and a water tank. This device directly places the fertilized eggs into the culture ball for hatching. However, this culture ball has only one inlet, and placing different batches of fertilized eggs in the same space is detrimental to hatching. Furthermore, the device's complex structure requires operating different mechanisms to meet hatching conditions, making it cumbersome and unsuitable for hatching different batches of channel catfish fertilized eggs. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a spotted catfish hatching device that simplifies the hatching operation and is applicable to hatching different batches of spotted catfish fertilized eggs.

[0004] The objective of this invention is achieved through the following technical solution: a channel catfish hatching device, comprising a hatching chamber, wherein at least one operating table is provided in the hatching chamber, and multiple cavities are provided on the surface of the operating table. Hatching components are selectively placed in the cavities. Each hatching component consists of a flowing water hatching tank and multiple independent hatching troughs suspended within the flowing water hatching tank. Warm water is continuously injected into the flowing water hatching tank during hatching. Each hatching trough forms a hatching space for the channel catfish hatching within the warm water. The hatching tank is equipped with multiple sieve holes for screening out spotted catfish larvae. The side wall of the flowing water hatching tank has an overflow outlet for drainage, and the end wall of the flowing water hatching tank has a larvae discharge pipe for releasing larvae. A plug is inserted into the discharge pipe during incubation. The bottom of each cavity has a drain outlet, and the side wall of each cavity has a water inlet for injecting warm water. The bottom of the operating platform has a drain pipe connected to each of the drain outlets, and the end face of the operating platform has a guide trough connected to each of the discharge pipes. It should be noted that the hatching chamber in this application can be located either above or below ground. Therefore, this application can be used by simply modifying existing warehouses or ponds.

[0005] The flowing water incubator is open-topped, allowing for the addition or removal of incubation tanks as needed. An escape-proof net is installed on the overflow outlet to prevent the spotted catfish from escaping. The warm water temperature is 26℃-28℃, controlled by a heater. The control of the warm water and the installation of the water system are existing methods and will not be elaborated upon here. Preferably, the depth of the cavity is not less than the height of the flowing water incubator. Since this application uses flowing water incubation, warm water flows into the cavity through the overflow outlet and finally flows into the drain pipe through the drain outlet. To avoid water splashing onto the operating table, the flowing water incubator is designed not to overflow from the cavity; specifically, ensuring the overflow outlet is below the operating table is sufficient. Multiple operating tables are provided in the incubation chamber, with walkways between them. The operating tables are regularly arranged, with their ends not touching the edges of the incubation chamber, facilitating work for the breeders. The operating table is equipped with oxygenation tubes for injecting oxygen into each chamber. The oxygenation tubes can be directly connected to each chamber, or they can be inserted into the incubation tanks separately using connectors.

[0006] As a further improvement of this application, the seedling guide trough is arranged at an angle of 5-10 degrees. The seedling guide trough is an open trough, which allows aquaculture personnel to directly observe the release of spotted catfish fry. The shorter end of the seedling guide trough is the downstream end, and the downstream port of the seedling guide trough is the fry packaging port. Aquaculture personnel can directly package the fry through the packaging port, inject oxygen, and then sell them directly or put them into the breeding pond.

[0007] Each operating platform is equipped with a horizontal bar above it, and multiple hooks are mounted on the horizontal bar for suspending the incubation tanks. The incubation tanks are hung on the hooks by ropes. Each horizontal bar has a slider at both ends, and the incubation chamber is equipped with a slide rail for moving the horizontal bar. The slide rails are arranged in pairs on both sides of the operating platform, and the sliders are slidably mounted on the slide rails. The sliding movement can be done manually or electrically. The sliders and slide rails are all made using existing methods, which will not be described in detail here.

[0008] Because this application uses the principle of flowing water incubation, each chamber acts as an independent flowing water incubator. Each flowing water incubator contains multiple independent incubation troughs, allowing different batches of spotted catfish fertilized eggs to be placed in the incubation troughs of different flowing water incubators for incubation. During incubation, the aquaculture personnel can gently shake the incubation troughs using sliders or hanging ropes, causing the hatched fry to fall through the sieve holes into the flowing water incubator, preventing the fry from eating the unhatched fertilized eggs. The water inlet-flowing water incubator-overflow outlet-chamber-drain outlet-drain pipe on the chamber form a flowing water path for incubation, with the water flow controlled at 0.2-0.3 m / s. The incubation trough-sieve hole-feeding pipe-feeding guide trough form a path for releasing the fry. Both the incubation water flow and the fry release have corresponding paths, ensuring that the incubation chamber and operating table remain clean and preventing cross-infection of the fry. The height of the operating platform is 0.7-1.2m (adjustable according to actual conditions), allowing the aquaculture personnel to operate while standing. The depth of the chamber is generally 0.4-0.7m. The flow-through incubator and incubation tank are determined according to the site conditions, ensuring that the environment for flow-through incubation is met. The proposed solution is applicable to incubating fertilized eggs of channel catfish from different batches and under different environments. By placing fertilized eggs from different batches and under different environments in different flow-through incubators after harvesting, isolated incubation can be achieved, avoiding the stress response to the seedlings caused by adding fertilized eggs during incubation, improving the privacy of the incubation environment, and thus increasing the hatching rate of channel catfish.

[0009] The beneficial effects of this utility model are as follows: Independent water incubation tanks are set up on the operating table. Water is discharged through the drain pipe and fish are released through the seedling guide trough. Each water incubation tank forms an independent incubation environment. The aquaculture personnel only need to inspect the incubation tank regularly, shake the incubation tank when necessary, and remove the plug when releasing fish. This simplifies the incubation process and operation, and solves the problem that the existing device cannot be used to incubate different batches of spotted catfish fertilized eggs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structural layout of this utility model;

[0011] Figure 2 for Figure 1Enlarged schematic diagram of region A in the middle;

[0012] Figure 3 This is a schematic diagram showing the arrangement of the incubation components of this utility model;

[0013] Figure 4 This is a schematic diagram of the side position of the incubation component of this utility model;

[0014] Figure 5 This is a schematic diagram of the structure of this utility model without an incubation tank.

[0015] Figure 6 This is a schematic diagram showing the installation position of the seedling guide groove of this utility model;

[0016] Figure 7 This is a schematic diagram showing the position of the seedling discharge tube of this utility model;

[0017] Figure 8 This is a schematic diagram of the linear guide groove of this utility model;

[0018] Figure 9 for Figure 8 Cross-sectional view along the KK direction;

[0019] Figure 10 This is a schematic diagram of the structure of the incubation tank of this utility model when it is suspended;

[0020] Figure 11 This is a schematic diagram showing the installation position of the crossbar of this utility model.

[0021] In the diagram, 1-hatching chamber, 2-operating table, 3-cavity, 4-hatching components, 5-walking path, 101-slide rail, 201-drainage pipe, 202-seedling guide trough, 203-crossbar, 204-hook, 205-slider, 206-linear guide trough, 207-connecting pipe, 208-support leg, 209-notch, 301-drainage outlet, 302-water inlet, 303-oxygenation pipe, 401-flow incubator, 402-hatching trough, 403-sieve hole, 404-overflow outlet, 405-seedling discharge pipe, 406-plug, 407-escape prevention net, 408-frame, 409-rigid sieve, 410-hanging rope. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1-5As shown, a channel catfish hatching device includes a hatching chamber 1, which contains two operating tables 2. A walkway 5 is reserved between adjacent operating tables 2. Four cavities 3 are arranged on the surface of each operating table 2, and the size of each cavity 3 can be adjusted according to actual conditions. Preferably, the four cavities 3 are of the same size. Hatching components 4 are selectively placed in each cavity 3. Each hatching component 4 consists of a flowing water hatching tank 401 and four independent hatching troughs 402 suspended within the flowing water hatching tank 401. The flowing water hatching tank 401 is open, and warm water is continuously injected into it during hatching. Each hatching trough 402 forms a hatching space for channel catfish hatching in the warm water. The hatching troughs 402 are provided with multiple sieve holes 403 for screening out channel catfish larvae. The side wall of the water incubator 401 is provided with an overflow port 404 for drainage. The overflow port 404 is also provided with an escape-proof net 407 to prevent the spotted catfish from escaping. The end wall of the flowing water incubator 401 is provided with a seedling discharge pipe 405 for releasing seedlings. During the incubation period, a plug 406 is inserted into the seedling discharge pipe 405. The bottom of each cavity 3 is provided with a drain port 301. The side wall of the cavity 3 is provided with a water inlet 302 for injecting warm water. The bottom of the operating table 2 is provided with a drain pipe 201 that is connected to the drain port 301.

[0024] like Figures 6-9 As shown, the end face of the operating platform 2 is provided with a seedling guide trough 202 that communicates with the seedling discharge pipe 405. The seedling guide trough 202 is fixed to the operating platform 2 by a bracket. Specifically, the seedling guide trough 202 consists of a straight guide trough 206 and multiple connecting pipes 207. The connecting pipes 207 connect the straight guide trough 206 and the seedling discharge pipe 405. The seedling discharge pipe 405 extends out of the end face of the operating platform 2, and the corresponding operating platform 2 has corresponding through holes. Because the straight guide trough 206 is arranged at an angle, it has a notch 209 for securing the connecting pipe 207. The connecting pipe 207 is inserted into the straight guide trough 206, and the connecting pipe 207 is fixed to the seedling pipe 405 by a clamp. The straight guide trough 206 is an inclined, elongated U-shaped trough (or a 200mm diameter PVC pipe cut in half). Through the impact of water flow, the fish fry are gathered at the downstream end, efficiently collecting the fish fry and facilitating their packaging and transportation. The upstream port (higher end) of the linear guide trough 206 is sealed to prevent fry from being washed out of the trough 206 when releasing fish. The connecting pipe 207 is arranged at an angle to facilitate the release of fry. During use, the inner wall of the linear guide trough 206 should be kept smooth to avoid scratching the fry when releasing fish. The hatching tank 402 consists of a frame 408 and a rigid screen 409 mounted on the frame 408. The rigid screen 409 can be made of materials such as plastic or stainless steel, and the mesh openings on the rigid screen 409 are the screen holes 403. Figure 10As shown, to prevent the incubation tank 402 from tipping over when shaken, the incubation tank 402 is fixed by a four-point suspension using ropes 410. Preferably, the bottom of the operating table 2 is provided with support legs 208 to facilitate the arrangement of the drain pipe 201.

[0025] The temperature of the warm water is 26℃-28℃, at which temperature the fertilized eggs of the spotted catfish will hatch in 5-6 days. The depth of the cavity 3 is not less than the height of the flowing water incubator 401. The seedling guide trough 202 is arranged at an angle, and its downstream port is the seedling packaging port. The angle of inclination of the seedling guide trough 202 is 5-10 degrees. Figure 11 As shown, each of the operating platforms 2 is equipped with a crossbar 203 above it. Multiple hooks 204 are mounted on the crossbar 203 for suspending the incubation troughs 402. The incubation troughs 402 are suspended from the hooks 204 by ropes 410. Each crossbar 203 has a slider 205 at both ends. The sliders 205 are electrically operated, and each slider 205 reciprocates via a motor when the position of the incubation trough 402 needs to be adjusted. The reciprocating stroke does not exceed the width of the cavity 3, ensuring that the incubation trough 402 remains within the flowing incubator 401 during movement. The incubation chamber 1 is equipped with a slide rail 101 for moving the crossbar 203. The slide rails 101 are arranged in pairs on both sides of the operating platform 2, and the sliders 205 are slidably mounted on the slide rails 101. It should be noted that since the positions of the operating table 2 and the cavity 3 are fixed, the sliding installation of the crossbar 203 can be replaced with a fixed installation. Specifically, the slide rail 101 is replaced with a fixed rod, and both ends of the crossbar 203 are directly fixed to the fixed rod. The operating table 2 is equipped with an oxygenation tube 303 for injecting oxygen into each cavity 3.

[0026] The hatching of fertilized eggs is carried out according to the following steps: (1) Before hatching, the device is installed: First, the water incubator 401 is placed in the cavity 3, where the outer dimensions of the cavity 3 are larger than the dimensions of the water incubator 401, and the position of the drain outlet 301 is left to form a water flow path. Then, the connecting pipe 207 is connected to the seedling discharge pipe 405 and sealed. At this time, the plug 406 is inserted into the seedling discharge pipe 405, and the straight guide groove 206 is cleaned to ensure that its inner wall is smooth. Then, warm water is injected into the water incubator 401 through the water inlet 302, where each hatching tank 402 corresponds to an independent water inlet 302. The water pipe can be extended on the water inlet 302 to ensure that the warm water flows directly into the hatching tank 402. At the same time, the position of the crossbar 203 is adjusted to the top of the water incubator 401, and the hatching tank 402 is hung on the hook 204. The hatching tank 402 is 2-5cm above the water surface. The space where the hatching tank 402 is located underwater forms the hatching space. The water flow runs for 3-5 hours first. (2) Hatching: Fertilized eggs of the spotted catfish collected in the same batch or under the same environment are placed into the hatching tanks 402 of one or more flow-through hatching boxes 401 at a density of 400,000 to 800,000 eggs / cubic meter. Fertilized eggs from different batches or under different environments are placed in the hatching tanks 402 of different flow-through hatching boxes 401 to avoid confusion and asynchronous hatching times within the same flow-through hatching box 401. The water flow is controlled at 0.2-0.3 m / s, and the water temperature is controlled at 26℃-28℃. The flowing water is discharged through the drain pipe 201. It should be noted that during the hatching process, the water is prone to deterioration due to the continuous hatching of fertilized eggs and must be drained promptly to avoid affecting the hatching rate. During hatching, if fry are found trapped in the fertilized egg mass or other situations requiring shaking of the eggs occur, this is achieved by manually shaking the hanging rope 410 or the crossbar 203. (3) Fish Release: After 5-6 days of incubation, most fertilized eggs will hatch. If any eggs have not hatched, they are considered bad. Lower the water temperature to 24℃-25℃. When releasing the fish, close the inlet 302 and remove the plug 406. The fry will flow into the downstream port through the guide trough 202 and be packaged through the fry packaging port. After oxygen is injected, the fish can be sold directly or placed in the breeding pond. Fertilized eggs from the same batch or environment can be released at the same time, while fertilized eggs from different batches or environments can be released sequentially.

[0027] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A spot catfish hatching device, comprising an incubation chamber (1), characterized in that, The incubation chamber (1) is equipped with at least one operating table (2). Multiple cavities (3) are provided on the surface of the operating table (2). Incubation components (4) are selectively placed in the cavities (3). Each incubation component (4) consists of a flowing incubator (401) and multiple independent incubation tanks (402) suspended within the flowing incubator (401). During incubation, the flowing incubator (401) is continuously filled with warm water. Each incubation tank (402) forms an incubation space for the incubation of spotted catfish in the warm water. Multiple sieve holes (403) are provided on each incubation tank (402) for screening out spotted catfish larvae. The side wall of the water incubator (401) is provided with an overflow port (404) for drainage. The end wall of the water incubator (401) is provided with a seedling discharge pipe (405) for seedling release. During the incubation period, a plug (406) is inserted into the seedling discharge pipe (405). The bottom of the cavity (3) is provided with a drain port (301). The side wall of the cavity (3) is provided with a water inlet (302) for injecting warm water. The bottom of the operating table (2) is provided with a drain pipe (201) that is connected to the drain port (301). The end face of the operating table (2) is provided with a seedling guide trough (202) that is connected to the seedling discharge pipe (405).

2. The spot catfish hatching device according to claim 1, characterized in that, The flowing incubator (401) is an open-top design.

3. The spotted catfish hatching device according to claim 1, characterized in that, The overflow outlet (404) is also equipped with an escape-proof net (407) to prevent the spotted catfish from escaping.

4. The spot catfish hatching device according to claim 1, characterized in that, The depth of the cavity (3) is not less than the height of the flowing water incubator (401).

5. The spot catfish hatching device according to claim 1, characterized in that, The incubation chamber (1) is equipped with multiple operating tables (2), and a walkway (5) is reserved between the operating tables (2).

6. The spot catfish hatching device according to claim 1, characterized in that, The seedling guide trough (202) is arranged at an angle, and the downstream port of the seedling guide trough (202) is the seedling packaging port.

7. The spot catfish hatching device according to claim 1, characterized in that, The inclination angle of the seedling guide groove (202) is 5-10 degrees.

8. A spot catfish hatching device according to claim 1 or 5, characterized in that, Each of the operating tables (2) is provided with a crossbar (203) above it, and the crossbar (203) is provided with a plurality of hooks (204) for suspending the incubation tank (402), and the incubation tank (402) is suspended on the hooks (204) by a rope (410).

9. A spot catfish hatching device according to claim 8, characterized in that, Each of the crossbars (203) is provided with a slider (205) at both ends. The incubation chamber (1) is provided with a slide rail (101) for moving the crossbars (203). The slide rails (101) are arranged in pairs on both sides of the operating table (2). The sliders (205) are slidably mounted on the slide rails (101).

10. A spot catfish hatching device according to claim 1, characterized in that, The operating console (2) is equipped with an oxygenation tube (303) for injecting oxygen into each cavity (3).

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