A marine net cage farming system and method of use thereof

Abstract

The application discloses a marine net cage breeding system and a use method thereof, which comprises a net cage main body, lifting units are arranged on the two sides of the net cage main body, a sinking auxiliary unit is arranged at the bottom of the net cage main body, a breeding dome is further arranged at the top of the net cage main body, a breeding cavity is arranged in the breeding dome, and a monitoring unit is arranged in the breeding cavity; a bait feeding pipe and an air pipe which are communicated with the breeding cavity are connected to the top of the breeding dome, a breeding opening which is directed to the bottom of the net cage main body is formed in the bottom of the breeding dome, the breeding cavity and the inside of the net cage main body are communicated through the breeding opening, a bait frame which is matched with the breeding opening is further arranged in the inside of the net cage main body, and the bait frame is hung on one side of the breeding dome through a bait rope.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marine aquaculture, and in particular to a marine net cage aquaculture system and a use method thereof. BACKGROUND

[0002] In the open-sea marine aquaculture, a net cage formed by binding a net cloth on a net frame (i.e., a truss system) is used for aquaculture. When extreme weather or adverse sea conditions occur, the entire aquaculture facility is prone to damage and destruction, and the aquaculture objects in the net cage are also prone to great loss. To address this problem, people can sink the net cage into the deep sea during aquaculture, so as to effectively protect the aquaculture facility and the aquaculture objects in extreme weather or adverse sea conditions. For example, the patent application document with the publication number CN117814157A discloses a lifting type aquaculture net cage. The lifting type aquaculture net cage realizes the lifting function of the net cage by charging or discharging air into the net cage, so as to sink the net cage underwater. However, the above-mentioned scheme has the following defects:

[0003] (1) The aquaculture objects in the net cage are difficult to be aerated because of the large density of the aquaculture objects in the net cage after the net cage is sunk into the sea for aquaculture;

[0004] (2) After the net cage is sunk into the sea for aquaculture, it is not convenient to feed the aquaculture objects in the net cage. If the feed is directly fed into the sea water, the feed will quickly spread in the sea water, which results in a very low feeding efficiency;

[0005] (3) After the net cage is sunk into the sea for aquaculture, it is difficult to effectively observe the state of the aquaculture objects in the net cage. Only the state of the aquaculture objects can be observed according to experience. SUMMARY

[0006] In order to overcome the defects of the prior art, the present application solves the technical problem of providing a marine net cage aquaculture system and a use method thereof. The net cage can be sunk into the sea for deep-sea aquaculture, and the state of the aquaculture objects can be observed in time, and the aquaculture objects can be aerated and fed.

[0007] To achieve this purpose, the present application adopts the following technical scheme:

[0008] The marine net cage aquaculture system provided by the present application comprises a net cage main body, lifting units are arranged on both sides of the net cage main body, a sinking auxiliary unit is arranged at the bottom of the net cage main body, a breeding dome is further arranged at the top of the net cage main body, a breeding cavity is arranged in the breeding dome, and a monitoring unit is arranged in the breeding cavity.

[0009] The top of the aquaculture dome is connected to a feeding pipe and a ventilation pipe that communicate with the aquaculture chamber. The bottom of the aquaculture dome has an aquaculture opening facing the bottom of the net cage body. The aquaculture chamber and the interior of the net cage body are connected through the aquaculture opening. The interior of the net cage body is also provided with a feed frame that cooperates with the aquaculture opening. The feed frame is suspended from the side of the aquaculture dome where the aquaculture opening is located by a feed rope.

[0010] The lifting unit includes a lifting auxiliary structure and a lifting mechanism. The lifting auxiliary structure includes two sets of floating boxes respectively located at the top and bottom edges of the main body of the net cage. The floating boxes are connected to floating air pipes for inflation and deflation. The lifting mechanism is located above the sea surface and is equipped with a lifting rope for lifting the main body of the net cage. One end of the lifting rope is tied to the top of the main body of the net cage. The lifting mechanism is one of a motor-driven structure, a hydraulic-driven structure, or a rope drum-driven structure.

[0011] The sinking auxiliary unit includes several sinking blocks, which are tied to the bottom of the main body of the cage by connecting ropes. The sinking blocks are evenly distributed at the bottom of the main body of the cage.

[0012] The monitoring unit includes a monitoring probe and a fish-attracting lamp installed at the top of the aquaculture chamber. The monitoring probe and the fish-attracting lamp are connected to an external monitoring terminal via cables at the top of the aquaculture dome.

[0013] A method for using a marine cage aquaculture system, comprising the following steps:

[0014] S00: The main body of the net cage sinks. After the main body of the net cage is deployed in the preset sea area, the air in the sinking and floating box is first discharged by the sinking and floating air pipe, and seawater enters the sinking and floating box, which reduces the buoyancy received by the main body of the net cage. When the main body of the net cage sinks to the predetermined depth, the lifting mechanism pulls the main body of the net cage into position.

[0015] S10: The aquaculture dome is used to ventilate, feed, and monitor the first and second net chambers 1. When ventilating, the air in the aquaculture chamber is replaced at regular intervals using the ventilation pipe. When feeding, the feed is put into the aquaculture chamber through the feeding pipe. When monitoring, the status of the aquatic organisms is monitored using the monitoring probe.

[0016] S20: The main body of the net cage floats up, and air is injected into the floating tank using the floating air pipe, causing the seawater in the floating tank to be discharged. The buoyancy received by the main body of the net cage increases. When the main body of the net cage rises to a predetermined depth, the lifting mechanism pulls the main body of the net cage into position.

[0017] The beneficial effects of this invention are as follows:

[0018] (1) By setting up floating boxes at the top and bottom of the main body of the net cage to assist in the lifting and lowering of the main body of the net cage, when the main body of the net cage needs to be lifted, the seawater in the floating frame is discharged by venting into the floating box to increase buoyancy; when the main body of the net cage needs to be lowered, the gas in the floating box is extracted to allow the floating frame to suck in seawater to reduce buoyancy.

[0019] (2) An aquaculture dome is also provided at the top of the cage. An aquaculture chamber is provided inside the aquaculture dome. An aquaculture opening is provided at the bottom of the aquaculture chamber. A feed frame that cooperates with the aquaculture opening is provided in the aquaculture space. The feed frame is suspended from the lower part of the aquaculture opening by a feed rope. A feed tube is also connected to the top of the aquaculture dome so that the feed put into the aquaculture chamber can fall into the feed frame through the aquaculture opening, thereby completing the feeding.

[0020] (3) The top of the aquaculture dome is also equipped with a fish-attracting lamp and a monitoring probe. Under the attraction of the fish-attracting lamp, the fish in the net cage can feed in a concentrated manner, which can attract aquatic objects and fish and shrimp to the aquaculture opening. This can greatly improve the feed utilization efficiency and avoid excessive diffusion of feed into the seawater, which would cause waste. The monitoring probe can also monitor the feeding status of the fish in real time.

[0021] (4) An air pipe is also provided at the top of the aquaculture dome. The air pipe is connected to a ventilation pipe. When the ventilation pipe injects air into the aquaculture chamber, the horizontal surface in the aquaculture chamber moves downward and the volume of the aquaculture chamber increases. When the ventilation pipe sucks the air out of the aquaculture chamber, the horizontal surface in the aquaculture chamber moves upward and the volume of the aquaculture chamber decreases. In this way, the volume of the aquaculture chamber can be adjusted by adjusting the amount of air injected into the aquaculture chamber by the external air pump, thereby adjusting the buoyancy of the aquaculture dome. When the number of aquatic products is large, the volume of the cavity can be increased to ensure ventilation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the structural principle of a marine cage aquaculture system provided in a specific embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram illustrating the structural principle of a marine cage aquaculture system (multi-layer cage) provided in a specific embodiment of the present invention.

[0024] In the picture:

[0025] 1. Main body of the cage; 11. Dividing mesh panel; 12. First mesh cavity; 13. Second mesh cavity; 111. Dividing opening; 112. Dividing door; 14. Guide rod;

[0026] 2. Lifting unit; 21. Lifting auxiliary structure; 22. Lifting mechanism; 211. Floating and sinking box; 212. Floating and sinking air pipe; 221. Lifting rope;

[0027] 3. Sinking auxiliary unit; 31. Sinking block;

[0028] 4. Aquaculture dome; 41. Aquaculture chamber; 42. Aquaculture opening; 43. Stabilizing plate;

[0029] 5. Monitoring unit; 51. Monitoring probe; 52. Fish attractant light; 53. Monitoring terminal;

[0030] 6. Feeding tube;

[0031] 7. Ventilation pipe;

[0032] 8. Bait basket;

[0033] 9. Bait rope. Detailed Implementation

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] To address the challenges of timely feeding, aeration, and condition monitoring of aquatic organisms within net cages after they have been submerged in seawater for aquaculture, this invention provides a marine net cage aquaculture system and its usage method.

[0036] Example 1: A marine cage aquaculture system includes a cage body 1. The cage body 1 is mainly composed of a truss system forming a net frame. A net covering the net frame forms the cage body 1 for aquaculture. This creates an aquaculture space within the cage body 1. Lifting units 2 are provided on both sides of the cage body 1. Specifically, the lifting unit 2 includes a lifting auxiliary structure 21 and a lifting mechanism 22. The lifting auxiliary structure 21 includes two sets of floating boxes 211 respectively located at the top and bottom edges of the cage body 1. Floating air pipes 212 for inflation and deflation are connected to the floating boxes 211. Thus, when the cage body 1 needs to be raised... Air is introduced into the buoyancy tank 211 through the buoyancy pipe 212, causing seawater to be discharged from the buoyancy tank 211 and increasing the buoyancy of the net cage body 1. When it is necessary to sink the net cage body 1, the air is extracted from the buoyancy tank 211 through the buoyancy pipe 212, causing the buoyancy tank 211 to draw in seawater and reduce the buoyancy of the net cage body 1. Furthermore, the buoyancy pipe 212 is connected to an air pump device on the sea surface, and the amount of air in the buoyancy tank 211 can be adjusted by controlling the working state of the air pump, thereby achieving precise control of the floating and sinking state of the net cage body 1. At the same time, a sinking auxiliary unit 3 is set at the bottom of the net cage body 1. The auxiliary unit 3 includes several sinking blocks 31, which are tied to the bottom of the main body 1 of the net cage by connecting ropes. The sinking blocks 31 are evenly distributed at the bottom of the main body 1. They are generally made of concrete or metal and have a certain weight, providing sufficient sinking force when the main body 1 needs to sink. The even distribution of the sinking blocks 31 ensures that the main body 1 remains balanced during sinking, preventing tilting or deformation. It also keeps the main body 1 stable in the water, making it less susceptible to displacement due to currents or waves. The lifting mechanism 22 is positioned above the sea surface. A lifting rope 221 is provided for raising the main body 1 of the net cage. One end of the lifting rope 221 is tied to the top of the main body 1 of the net cage. The lifting mechanism 22 is one of the following: motor-driven structure, hydraulic drive structure, and rope drum drive structure. Preferably, the lifting mechanism 22 adopts a motor-driven rope drum structure as an example. The motor drives the drum to rotate, thereby realizing the raising and lowering of the lifting rope 221, and thus controlling the raising and lowering of the main body 1 of the net cage. The lifting mechanism 22 is used in conjunction with the floating box 211. It can flexibly adjust the water depth of the main body 1 of the net cage according to different aquaculture needs and changes in the marine environment, so as to provide the most suitable growth environment for aquaculture organisms.

[0037] Preferably, the top of the main body 1 of the net cage is also provided with an aquaculture dome 4, and an aquaculture chamber 41 is provided inside the aquaculture dome 4. The top of the aquaculture dome 4 is connected to a feeding pipe 6 and a ventilation pipe 7 that communicate with the aquaculture chamber 41. The bottom of the aquaculture dome 4 has an aquaculture opening 42 facing the bottom of the main body 1 of the net cage. The aquaculture chamber 41 and the interior of the main body 1 of the net cage are connected through the aquaculture opening 42. The interior of the main body 1 of the net cage is also provided with a feed frame 8 that cooperates with the aquaculture opening 42. The feed frame 8 is suspended from the side of the aquaculture dome 4 with the aquaculture opening 42 by a feed rope 9. In this way, during aquaculture, feed can be fed into the aquaculture chamber 41 through the feeding pipe 6 to feed the aquatic organisms. The feed frame 8 can also allow uneaten feed to fall into the feed frame 8. In this system, the feed is prevented from spreading, and air can be pumped into the aquaculture chamber 41 through the ventilation pipe 7, allowing the aquatic organisms in the main body of the net cage 1 to exchange air through the aquaculture chamber 41. To control feeding efficiency, the amount of air entering the aquaculture chamber 41 through the ventilation pipe 7 can be adjusted by an external air pump, thereby adjusting the liquid level in the aquaculture chamber 41. When the liquid level is in a wider part of the aquaculture chamber 41, the feeding and aquaculture efficiency is higher; when the liquid level is in a narrower part of the aquaculture chamber 41, the feeding and aquaculture efficiency is lower. Thus, the feeding and aquaculture efficiency can be adjusted by adjusting the liquid level in the aquaculture chamber 41. In summary, the aquaculture dome 4 cannot drive the main body of the net cage 1 to float or sink. The rising and sinking of the cage is mainly driven by multiple floating boxes 211. Specifically, when the main body 1 of the cage rises, gas is injected into the floating boxes 211, and seawater is expelled from the floating boxes 211, increasing the buoyancy of the main body 1. The lifting mechanism 22 can then easily use the lifting rope 221 to raise the entire main body 1 to the sea surface. Conversely, when the main body 1 of the cage descends, gas is drawn out of the floating boxes 211, and seawater is injected into the floating boxes 211, decreasing the buoyancy of the main body 1. The lifting mechanism 22 then releases the lifting rope 221, causing the entire main body 1 to sink into the seawater. Therefore, it can be seen that during the entire process of the main body 1 rising and sinking, the aquaculture dome 4 does not play a role in driving the main body 1 to rise and sink. The aquaculture dome 4 is designed to... The main function of the setup is to facilitate feeding, aeration, and monitoring of the aquatic organisms cultured in the main body 1 of the net cage. Specifically, the operation of the culture dome 4 is as follows: feeding and aeration can be conveniently performed in the culture chamber 41 inside the culture dome 4 through the feeding pipe 6 and the aeration pipe 7. In order to improve the culture efficiency and attract the aquatic organisms to the culture chamber 41 to feed and ventilate, a fish-attracting light 52 is also installed at the top of the culture chamber 41. This can more actively attract the aquatic organisms to the culture opening 42 to feed and ventilate. Even if the feed is not eaten, it can fall into the feed box 8 below the culture opening 42. At the same time, the monitoring probe 51 installed at the top of the culture dome 4 can also detect the growth status of the aquatic organisms.The above describes the function and operation of the aquaculture dome 4 in this case. It fully demonstrates that the aquaculture dome 4 will always be in contact with the seawater inside the main cage 1 (i.e., the aquaculture opening 42) for use by the aquaculture organisms. Its function is not to cause the main cage 1 to float or sink; therefore, it does not need to form a nearly closed system with only a small volume of interconnected parts.

[0038] It should be further clarified that the main activity space for aquaculture is not within the culture chamber 41 of the culture dome, but rather within the space of the main body 1 of the net cage. They only gather in the culture dome 4 when feeding and ventilating. The liquid level adjustment within the culture dome 4 is primarily achieved by pumping air in and out using an external air pump, without generating compressed gas (because the culture dome 4 does not contribute to the buoyancy or submersion of the main body 1). Even if pressure above sea level is generated, it is only to adapt to the corresponding depth of seawater, and aquaculture can withstand the pressure at that depth. Regarding dissolved oxygen, firstly, due to the limited volume of the culture dome 4, the amount of air introduced is far from sufficient to change the dissolved oxygen concentration in a localized area of ​​seawater. Therefore, in this case, the use of a fish-attracting light 52 to lure the aquaculture organisms to the culture inlet 42 is necessary. To further explain the function of adjusting the liquid level in the aquaculture chamber 41, air is supplied to the aquaculture chamber 41 through the ventilation pipe 7, allowing the aquatic organisms in the main body of the net cage 1 to exchange air through the aquaculture chamber 41. To control feeding efficiency, the amount of air supplied to the aquaculture chamber 41 through the ventilation pipe 7 can be adjusted by an external air pump. That is, the greater the amount of air supplied to the aquaculture chamber 41, the more the liquid level moves towards the aquaculture opening 42; the smaller the amount of air supplied to the aquaculture chamber 41, the more the liquid level moves towards the top of the aquaculture dome 4. This adjusts the liquid level in the aquaculture chamber 41. When the liquid level is located in a wider part of the aquaculture chamber 41, the feeding and aquaculture efficiency is higher; when the liquid level is located in a narrower part of the aquaculture chamber 41, the feeding and aquaculture efficiency is lower. Thus, the feeding and aquaculture efficiency can be adjusted by adjusting the liquid level in the aquaculture chamber 41.

[0039] A monitoring unit 5 is installed inside the aquaculture chamber 41. Specifically, the monitoring unit 5 includes a monitoring probe 51 and a fish-attracting lamp 52 installed at the top of the aquaculture chamber 41. The monitoring probe 51 and the fish-attracting lamp 52 are connected to an external monitoring terminal 53 via cables at the top of the aquaculture dome 4. The monitoring probe 51 and the fish-attracting lamp 52 are connected to the outside via cables to provide power, control, and information transmission to the fish-attracting lamp 52 and the monitoring probe 51. The monitoring probe 51 can monitor and observe the status of the aquatic organisms in the main body of the net cage 1 in real time. At the same time, it can also be configured with parameters such as water quality, temperature, and dissolved oxygen as needed to provide data support for aquaculture management. The fish-attracting lamp 52 can emit light of a specific wavelength at a specific time according to the habits of the farmed fish, which can attract fish and shrimp from the sea into the main body of the net cage 1 as natural food for the farmed aquatic organisms. It can also attract the farmed aquatic organisms in the main body of the net cage 1 to gather in the aquaculture chamber for efficient feeding, ventilation, and observation. The external monitoring terminal can remotely receive the data transmitted back by the monitoring probe 51 and control the fish-attracting lamp 52 to realize intelligent management of the aquaculture system.

[0040] In summary, during actual use, this marine cage aquaculture system can control the water depth of the cage body 1 by adjusting the lifting unit 2 according to aquaculture needs and changes in the marine environment. When the cage body 1 needs to float, the buoyancy can be increased by inflating the buoyancy tank 211, and the lifting mechanism 22 can be activated to tighten the lifting rope 221 to assist the cage body 1 in rising. When the cage body 1 needs to sink, the gas in the buoyancy tank 211 can be discharged to reduce buoyancy, and the lifting rope 221 can be released. The weight of the sinking block 31 can be used to sink the cage body 1 to the predetermined water depth. During the aquaculture process, feed is put into the aquaculture chamber through the feeding pipe 6. The feed falls into the feeding frame 8, and fish can enter the aquaculture chamber 41 through the aquaculture opening 42 to feed. The ventilation pipe 7 is responsible for air exchange in the aquaculture chamber 41 to ensure normal ventilation for aquaculture organisms. The monitoring unit 5 monitors the aquaculture situation in real time and guides fish behavior through the fish attraction light 52 to improve aquaculture efficiency.

[0041] Example 2: In Example 1, the aquaculture dome 4 is fixedly located at the top of the net cage body 1, which limits its influence range. Therefore, the aquaculture dome 4 is located inside the net cage body 1, so that the aquaculture dome 4 can float randomly inside the net cage body 1. At the same time, when the cavity volume of the aquaculture chamber 41 is different, the aquaculture dome 4 can also be adjusted to different depths inside the net cage body 1 to have a greater impact on the aquaculture objects inside the net cage body 1. In this process, a stabilizing plate 43 is also fixedly installed on the circumferential side of the aquaculture dome 4 to prevent the aquaculture dome 4 from overturning and flipping during the floating process.

[0042] Example 3: Based on Examples 1 and 2, in order to further improve the utilization efficiency of the breeding space inside the cage body 1, a dividing mesh plate 11 is also provided inside the cage body 1. In this way, the dividing mesh plate 11 divides the inside of the cage body 1 into a first mesh cavity 12 and a second mesh cavity 13, so that different mesh cavities can be used to carry out layered and diversified breeding inside the cage body 1.

[0043] To adapt the aquaculture dome 4 to tiered aquaculture conditions, the partition mesh plate 11 has a partition opening 111 that cooperates with the aquaculture dome 4. The partition opening 111 has two partition doors 112, which are connected to the partition mesh plate 11 by a torsion spring. Other equivalent replacement parts can be used depending on the environment. The main function is to allow the two partition doors 112 to automatically close the partition opening 111 when no external force is applied, thus separating the first mesh cavity 12 and the second mesh cavity 13, ensuring the tiered aquaculture effect of the net cage body 1. Furthermore, several guide rods 14 that cooperate with the stabilizing plate 43 are installed inside the first mesh cavity 12 between the partition opening 111 and the top of the net cage body 1. When the aquaculture dome 4 descends along the guide rods 14 from the first mesh cavity 12 to the second mesh cavity 13 and reaches the partition opening 111, the aquaculture dome 4 opens the two partition doors 112 to connect the aquaculture cavity 41 with the second mesh cavity 13. 4. When the aquaculture dome 4 rises from the partition 111 to the top of the main body 1 of the net cage, the two partition doors 112 close. After the aquaculture dome 4 completes the feeding and ventilation process for the aquatic organisms in the first net cavity 12, the ventilation pipe 7 can suck out the air from the aquaculture cavity 41. By reducing the volume of the aquaculture cavity 41, the buoyancy of the aquaculture dome 4 decreases, and it can slide along the guide rod 14 to the partition 111, thereby opening the two partition doors 112. This connects the aquaculture cavity 41 with the second net cavity 13. Then, the aquaculture dome 4 can feed and ventilate the aquatic organisms in the second net cavity 13. The ventilation pipe 7 can blow air into the aquaculture cavity 41, thereby increasing the volume of the aquaculture cavity 41. The buoyancy of the aquaculture dome 4 increases, and the aquaculture dome 4 rises along the guide rod 14 from the partition 111 to the top of the main body 1 of the net cage. The two partition doors 112 close, thus completing one cycle of operation for the first net cavity 12 and the second net cavity 13.

[0044] Example 4: Based on the above examples, this case also proposes a method for using a marine cage aquaculture system, for conducting aquaculture using a marine cage aquaculture system, including the following steps:

[0045] S00: The main body of the net cage 1 sinks. After the main body of the net cage 1 is deployed in the preset sea area, the air in the sinking and floating box 211 is first discharged by the sinking and floating air pipe 212, and seawater enters the sinking and floating box 211, which reduces the buoyancy received by the main body of the net cage 1. When the main body of the net cage 1 sinks to the predetermined depth, the lifting mechanism 22 pulls the main body of the net cage 1 into position.

[0046] S10: The aquaculture dome 4 is used to ventilate, feed and monitor the first net cavity 12 and the second net cavity 13. When ventilating, the air in the aquaculture cavity 41 is replaced at regular intervals using the ventilation pipe 7. When feeding, the feed is put into the aquaculture cavity 41 through the feeding pipe 6. When monitoring, the status of the aquatic objects is monitored using the monitoring probe 51.

[0047] In step S10, the aquaculture dome 4 is moved and switched between the first mesh cavity 12 and the second mesh cavity 13 as needed for ventilation, feeding, and monitoring. The movement process of the aquaculture dome 4 within the main body of the net cage 1 is divided into the following two stages:

[0048] S11: The aquaculture dome 4 sinks along the guide rod 14 from the first net cavity 12 to the second net cavity 13. This process mainly involves sucking out the air from the aquaculture cavity 41 through the ventilation pipe 7. By reducing the volume of the aquaculture cavity 41, the buoyancy of the aquaculture dome 4 is reduced. In this way, the aquaculture dome 4 can slide along the guide rod 14 to the partition opening 111, thereby opening the two partition doors 112. This allows the aquaculture cavity 41 to connect with the second net cavity 13. Then, the aquaculture dome 4 can feed and ventilate the aquatic organisms in the second net cavity 13.

[0049] In step S11, during the process of the aquaculture dome 4 rising, the feed frame 8 first drives the two partition doors 112 to flip towards the first net cavity 12. After the feed frame 8 and the two partition doors 112 separate, the two partition doors 112 reset under the action of the torsion spring.

[0050] S12: The aquaculture dome 4 floats up from the partition opening 111 to the top of the net cage body 1 along the guide rod 14; the ventilation pipe 7 can then blow air into the aquaculture chamber 41, thereby increasing the cavity volume of the aquaculture chamber 41, increasing the buoyancy of the aquaculture dome 4, so that the aquaculture dome 4 floats up from the partition opening 111 to the top of the net cage body 1 along the guide rod 14, and the two partition doors 112 are closed;

[0051] In the two processes described above, an external air pump can be used to adjust the volume of the cavity in the breeding chamber 41 through the air exchange pipe 7, thereby achieving autonomous adjustment and control of the two processes.

[0052] S20: The main body 1 of the net cage floats up, and air is injected into the buoyancy box 211 through the buoyancy air pipe 212, so that the seawater in the buoyancy box 211 is discharged, and the buoyancy received by the main body 1 of the net cage increases. When the main body 1 of the net cage rises to the predetermined depth, the lifting mechanism 22 pulls the main body 1 of the net cage into position.

[0053] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. A marine cage aquaculture system, comprising a cage body (1), wherein lifting units (2) are provided on both sides of the cage body (1), and a sinking auxiliary unit (3) is provided at the bottom of the cage body (1), characterized in that, The top of the main body (1) of the cage is also provided with an aquaculture dome (4), and an aquaculture chamber (41) is provided inside the aquaculture dome (41), and a monitoring unit (5) is provided inside the aquaculture chamber (41). The top of the aquaculture dome (4) is connected to a feeding pipe (6) and a ventilation pipe (7) that communicate with the aquaculture chamber (41). The bottom of the aquaculture dome (4) is provided with an aquaculture opening (42) facing the bottom of the net cage body (1). The aquaculture chamber (41) and the inside of the net cage body (1) are connected through the aquaculture opening (42). The inside of the net cage body (1) is also provided with a feed frame (8) that cooperates with the aquaculture opening (42). The feed frame (8) is suspended from the aquaculture dome (4) on the side where the aquaculture opening (42) is located by a feed rope (9). The aquaculture dome (4) transitions from the top to the aquaculture opening (42) in an arc shape. To control the feeding efficiency, the amount of air introduced into the aquaculture chamber (41) through the ventilation pipe (7) is adjusted by an external air pump, thereby adjusting the liquid level position in the aquaculture chamber (41). When the liquid level is located in a wider part of the aquaculture chamber (41), the feeding and ventilation efficiency is higher; when the liquid level is located in a narrower part of the aquaculture chamber (41), the feeding and ventilation efficiency is lower. Thus, the feeding and ventilation efficiency is adjusted by adjusting the liquid level position in the aquaculture chamber (41).

2. The marine cage aquaculture system according to claim 1, characterized in that, The lifting unit (2) includes a lifting auxiliary structure (21) and a lifting mechanism (22). The lifting auxiliary structure (21) includes two sets of floating boxes (211) respectively set at the top and bottom edges of the main body of the net cage (1). The floating boxes (211) are connected to floating air pipes (212) for inflation and deflation. The lifting mechanism (22) is set above the sea surface. The lifting mechanism (22) is equipped with a lifting rope (221) for lifting the main body of the net cage (1). One end of the lifting rope (221) is tied to the top of the main body of the net cage (1). The lifting mechanism (22) is one of a motor drive structure, a hydraulic drive structure, or a rope drum drive structure.

3. A marine cage aquaculture system according to claim 2, characterized in that, The sinking auxiliary unit (3) includes several sinking blocks (31), which are tied to the bottom of the cage body (1) by connecting ropes. Several sinking blocks (31) are evenly arranged at the bottom of the cage body (1).

4. A marine cage aquaculture system according to claim 3, characterized in that, The monitoring unit (5) includes a monitoring probe (51) and a fish-attracting lamp (52) installed on the top of the breeding chamber (41). The monitoring probe (51) and the fish-attracting lamp (52) are connected to an external monitoring terminal (53) via a cable on the top of the breeding dome (4).

5. A marine cage aquaculture system according to claim 4, characterized in that: The aquaculture dome (4) is also fixed with a stabilizing plate (43) along the circumferential direction on the outward side.

6. A marine cage aquaculture system according to claim 5, characterized in that, The main body (1) of the net cage is also provided with a partition net plate (11), which divides the inside of the main body (1) of the net cage into a first net cavity (12) and a second net cavity (13). The partition net plate (11) is provided with a partition opening (111) that cooperates with the aquaculture dome (4). The partition opening (111) is provided with two partition doors (112). The partition doors (112) and the partition net plate (11) are connected by a torsion spring. A plurality of guide rods (14) cooperating with the stabilizing plate (43) are provided in the first mesh cavity (12) between the partition opening (111) and the top of the net cage body (1). When the aquaculture dome (4) sinks down from the first mesh cavity (12) to the second mesh cavity (13) along the guide rods (14) to the partition opening (111), the aquaculture dome (4) opens the two partition doors (112) to connect the aquaculture cavity (41) with the second mesh cavity (13). When the aquaculture dome (4) floats up from the partition opening (111) to the top of the net cage body (1) along the guide rods (14), the two partition doors (112) close.

7. A method of using a marine cage aquaculture system, for carrying out aquaculture operations using a marine cage aquaculture system as described in claim 6, characterized in that, Includes the following steps: S00: The main body of the net cage (1) sinks. After the main body of the net cage (1) is placed in the preset sea area, the air in the sinking and floating box (211) is first discharged by the sinking and floating air pipe (212), and seawater enters the sinking and floating box (211), which reduces the buoyancy received by the main body of the net cage (1). When the main body of the net cage (1) sinks to the predetermined depth, the lifting mechanism (22) pulls the main body of the net cage (1) tight and positions it. S10: Use the aquaculture dome (4) to ventilate, feed and monitor the first net cavity (12) and the second net cavity (13). When ventilating, use the ventilation pipe (7) to replace the air in the aquaculture cavity (41) at regular intervals. When feeding, put the feed into the aquaculture cavity (41) through the feeding pipe (6). When monitoring, use the monitoring probe (51) to monitor the status of the aquatic species. S20: The main body (1) of the net cage floats up, and air is injected into the floating box (211) through the floating air pipe (212), so that the seawater in the floating box (211) is discharged, and the buoyancy received by the main body (1) of the net cage increases. When the main body (1) of the net cage rises to the predetermined depth, the lifting mechanism (22) pulls the main body (1) of the net cage into position.

8. The method of using a marine cage aquaculture system according to claim 7, characterized in that, In step S10, the movement of the aquaculture dome (4) within the main body (1) of the net cage is divided into the following two stages: S11: The aquaculture dome (4) sinks along the guide rod (14) from the first mesh cavity (12) to the second mesh cavity (13); S12: The aquaculture dome (4) floats up from the partition (111) to the top of the cage body (1) along the guide rod (14).

9. A method of using a marine cage aquaculture system according to claim 8, characterized in that, In step S11, during the process of the aquaculture dome (4) rising, the feed frame (8) first drives the two partition doors (112) to flip towards the first mesh cavity (12). After the feed frame (8) and the two partition doors (112) separate, the two partition doors (112) reset under the action of the torsion spring.

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