Mariculture pile foundation net cage lifting system and lifting method thereof

Abstract

The invention discloses a marine culture pile foundation net cage lifting system and a lifting method thereof.The marine culture pile foundation net cage lifting system comprises a plurality of piles inserted into a seabed substrate, a bottom frame matched with a culture area is fixedly arranged at the bottom of a net cage and is of a truss structure composed of a plurality of hollow pipes, the hollow pipes are communicated with one another to form a water storage cavity, and the water storage cavity is communicated with the bottom of the net cage. A water passing hole matched with the water storage cavity is formed in the bottom of the bottom frame, a vent hole matched with the water storage cavity is formed in the top of the bottom frame, when the net cage descends, seawater enters the water storage cavity through the water passing hole, gas in the water storage cavity is discharged through the vent hole, and when the net cage ascends, the seawater enters the water storage cavity through the vent hole. Gas enters the water storage cavity through the vent hole, and seawater in the water storage cavity is discharged through the water passing hole; in this way, the net cage has the lifting function, the net cage can descend into a preset water layer of the seabed before typhoon or red tide comes, daily management such as net inspection, cleaning, net replacement and fish gathering and capturing is also facilitated, and the maintenance and production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of seawater aquaculture, and in particular to a seawater aquaculture pile foundation cage lifting system and a lifting method thereof. Background Art

[0002] Pile-foundation fence cages refer to a model of intensive marine aquaculture in which a certain area of ​​sea and water body is enclosed by piles and seine nets within a certain sea area. It is mainly composed of seine nets, piles, trusses, etc. It is a model close to ecological aquaculture, which is of great significance for protecting and rationally developing marine resources, promoting the transformation of fishermen and the green development of aquaculture. As a deep-sea aquaculture model, it has gradually been recognized by investors and aquaculture companies due to its advantages such as strong wind and wave resistance, good quality of adult fish, high economic benefits and friendly aquaculture environment. It can be arranged near islands and reefs outside the bay and in deep-sea waters.

[0003] The existing pile foundation fence cage will cause the following two problems: (1) First, since the nets are directly buried in the seabed without a bottom, the nets located below low tide are immersed in seawater for a long time, making it impossible to collect the nets for cleaning fouling organisms and inspecting the nets. Replacing the nets is difficult, which makes it difficult to observe and deal with problems such as net damage and fouling organism attachment. This makes it easy for fish to escape, resulting in significant economic losses, and is not convenient for collecting and catching fish. (2) Secondly, the aquaculture animals in the cages have no space to “hide or hide” during typhoons or red tides. They are at great risk of being killed or injured by typhoon waves or being contaminated by red tides, which reduces the economy and safety of traditional pile-based fence cage aquaculture.

[0004] Therefore, a system and method for conveniently raising and lowering a net is needed. Summary of the Invention

[0005] In order to overcome the defects of the existing technology, the technical problem to be solved by the present invention is to propose a seawater aquaculture pile foundation cage lifting system and a lifting method thereof, so that the aquaculture net can be lifted and lowered along the pile direction to facilitate the replacement and inspection of the net and respond to changes in the marine environment.

[0006] To achieve this object, the present invention adopts the following technical solutions: The present invention provides a seawater aquaculture pile foundation cage lifting system, comprising a plurality of piles inserted into a seabed matrix, wherein the plurality of piles enclose an aquaculture area, wherein a net is provided in the aquaculture area, wherein the net cooperates with the plurality of piles to enclose a cage having an aquaculture space, wherein a bottom frame cooperating with the aquaculture area is fixedly provided at the bottom of the net, that is, the bottom frame is sleeved outside the net, and the bottom frame is a truss structure composed of a plurality of hollow tubes, wherein the plurality of hollow tubes are interconnected to form a water storage cavity, wherein a water hole cooperating with the water storage cavity is provided at the bottom of the bottom frame, and a hole cooperating with the water storage cavity is provided at the top of the bottom frame. The air vent cooperates with the water storage chamber, and further includes an air vent pipe and an air compressor (not shown) cooperated with the water storage chamber. One end of the air vent pipe is connected to the air compressor, and the other end passes through a plurality of the secondary anchor rings and is connected to the air vent. The bottom frame is further provided with a water valve (not shown) cooperated with the water hole. The water valve is an electric valve or a pneumatic valve. When the net is lowered, seawater enters the water storage chamber through the water hole, and the gas in the water storage chamber is discharged through the air vent. When the net is raised, the gas enters the water storage chamber through the air vent, and the seawater in the water storage chamber is discharged through the water hole. The top of the net is provided with a main anchor ring which cooperates with the top of the pile. When the net cage is in normal breeding, the connection height of the main anchor ring on the pile is higher than the lowest tide sea level; it also includes a plurality of auxiliary anchor rings which are sleeved on the pile. The auxiliary anchor rings are connected to the net to pull the net toward the pile. When the net is raised or lowered, the plurality of auxiliary anchor rings slide along the pile to maintain the expansion state of the net during the raising or lowering process.

[0007] In order to facilitate lifting, it also includes an inner cable arranged inside the net cage, one end of the inner cable is fixedly connected to the top of the bottom frame, and the other end is connected to the top of the pile; it also includes an outer cable arranged outside the net cage, and a static anchor ring cooperating with the outer cable is provided on the pile below the lowest tide sea level, one end of the outer cable is connected to the top of the pile, and the other end passes through the static anchor ring and is fixedly connected to the bottom of the bottom frame.

[0008] The top of the pile is also provided with a pulling device (not shown in the figure) that cooperates with the inner cable, the outer cable and the main anchor ring. The pulling device is a crane, a winch, a pneumatic hoist, etc.

[0009] The top of the net cage is also provided with a net cover. When the net cage is lowered, the net cover is pre-connected with the net through a net cover zipper to prevent the cultured objects from running away during the sinking process.

[0010] A lifting method for a seawater aquaculture pile foundation cage lifting system is used to set up and control the seawater aquaculture pile foundation cage lifting system as described above. First, an aquaculture sea area is selected to set up the seawater aquaculture pile foundation cage lifting system as described above under normal aquaculture conditions. Second, when the cage needs to be raised for checking the net or catching fish, a water hole is opened by a water valve, air is injected into a water storage chamber of a bottom frame through an air compressor and a vent pipe, and seawater is discharged from the water storage chamber through the water hole. When the water storage chamber is full of air, the vent and water hole are closed, the outer cable is loosened, and the bottom frame and the net are lifted by the inner cable. When the cage needs to be lowered due to severe sea conditions such as typhoons or red tides, a net cover is pre-installed on the top of the cage, the water hole is opened, and the air in the water storage chamber is discharged through the air compressor and the vent pipe. Seawater enters the water storage chamber through the water hole. After the air in the water storage chamber is emptied, the inner cable is loosened, and the bottom frame and the cage are pulled downward by the outer cable to lower the cage.

[0011] Setting up the seawater aquaculture pile foundation cage lifting system as described above under normal aquaculture conditions includes the following steps: S00: inserting a plurality of piles into the seabed matrix to enclose a breeding area; S10: fixing the bottom of the net and the bottom frame together, installing a water valve on the water hole of the bottom frame, connecting a vent pipe and an air compressor to the vent hole, and setting the combination of the net and the bottom frame in the breeding area; S20: connecting the top of the net and the top of the pile through a main anchor ring, and the net and the bottom frame sink underwater under their own gravity; S30: connecting the net and the pile through a plurality of secondary anchor rings, so that the net is in an expanded state in the breeding area; S40: connecting an inner cable inside the net and an outer cable outside the net, and the outer cable passes through a static anchor ring when connected.

[0012] The beneficial effects of the present invention are: (1) The present invention effectively realizes the lifting and lowering of the pile-foundation cage net, so that it is not affected by severe weather such as typhoons and sea conditions such as red tides. Before the arrival of a typhoon or red tide, the cage can be lowered into a predetermined water layer on the seabed, and the natural law that waves decay rapidly with increasing water depth is used to avoid attacks by natural disasters such as typhoons or red tides, thereby improving the ability of pile-foundation cage aquaculture facilities and equipment to resist attacks by severe sea conditions such as typhoons and red tides; (2) Because the cage has a lifting function, it is convenient for daily management such as net inspection, cleaning, net replacement, and fish collection, thus reducing its maintenance and production costs; (3) The bottom frame and its inflation and exhaust functions can, on the one hand, effectively protect the net at the bottom of the cage; on the other hand, further maintain the expansion state of the entire net; thirdly, it can further facilitate the lifting of the cage, that is, a relatively small power crane can be used to achieve the lifting of the inner and outer cables; fourthly, when the aquaculture objects are harvested, the net rises to the top of the bottom frame, leaving a certain depth of water in the bottom frame, which can avoid water shortage of the aquaculture objects; (4) The buoyancy adjustment mechanism for auxiliary lifting is composed of a bottom frame, a vent pipe and an air compressor. The net buoyancy is controlled by adjusting the air / water ratio in the water storage chamber, so that the bottom frame drives the cage to hover in any water layer in the aquaculture area, thereby adapting to the growth needs of different species of aquaculture objects, maximizing the use of vertical water space, and increasing the yield per unit area. At the same time, when encountering storms or red tides, it can quickly dive to a safe depth; when light or feeding is needed, it floats to the shallow layer, improving the flexibility of aquaculture. In this way, a composite and coordinated aquaculture model of vertical stratification and dynamic adaptation to the environment is realized, which is more suitable for the development of deep-sea aquaculture industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the principle of a marine aquaculture pile foundation cage lifting system during normal aquaculture provided in a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the principle of a marine aquaculture pile foundation cage lifting system provided in a specific embodiment of the present invention when the cage floats on the sea surface; Figure 3 It is a schematic diagram of the principle of a marine aquaculture pile foundation cage lifting system provided in a specific embodiment of the present invention when the cage is sunk below the sea surface.

[0014] In the picture: 1. Pile; 11. Breeding area; 12. Secondary anchor ring; 2. Net clothes; 21. Net cover; 3. Bottom frame; 31. Water storage chamber; 32. Water hole; 33. Ventilation hole; 34. Main anchor ring; 4. Inner cable; 5. External cable; 51. Static anchor ring; 6. Ventilation pipe; 7. Lowest tide sea level. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0016] In order to address the problems that the nets of existing pile-foundation fence cages are inconvenient to lift and cannot be raised or lowered, which makes it inconvenient to maintain the nets or to gather fish, and it is difficult to effectively respond to marine disasters, the present invention provides a seawater aquaculture pile-foundation cage lifting system and lifting method.

[0017] Example 1: The present invention provides a marine aquaculture pile foundation cage lifting system comprising a plurality of piles 1 inserted into the seabed matrix, the plurality of piles 1 enclosing an aquaculture area 11, a net 2 being provided in the aquaculture area 11, the net 2 and the plurality of piles 1 cooperating to form a cage having an aquaculture space, the bottom of the net 2 being fixed with a bottom frame 3 cooperating with the aquaculture area 11, specifically, the bottom frame 3 being fixed on the outside of the net 2, the bottom frame 3 enabling the net 2 to be opened after being placed in water, and in order to effectively install the net 2 and the bottom frame 3 in the aquaculture area 11, a bottom frame 3 cooperating with the piles 1 is provided on the top of the net 2 The main anchor ring 34 is matched with the top of the column 1. In this way, the top of the net 2 can be fixed to the top of several piles 1 by the main anchor ring 34, thereby lifting the net 2. Then, the net 2 and the bottom frame 3 will sink below the water surface under the action of their own gravity. In this way, the piles 1 and the net 2 together form an operating area (i.e., a cage) for marine aquaculture within the breeding area 11. At the same time, when the net 2 is normally breeding, the connection height of the main anchor ring 34 on the pile 1 is higher than the lowest tide sea level 7. In this way, the breeding objects can be confined to the operating area for breeding.

[0018] The net 2 and the bottom frame 3 are lifted up to the surface of the water to facilitate the harvesting operation. Therefore, an inner cable 4 is provided inside the net 2 and an outer cable 5 is provided outside the net 2. One end of the inner cable 4 is fixedly connected to the top of the bottom frame 3, and the other end is connected to the top of the pile 1. For the outer cable 5, a static anchor ring 51 cooperating with the outer cable 5 is further provided on the pile 1 below the lowest tide sea level 7. One end of the outer cable 5 is connected to the top of the pile 1, and the other end passes through the static anchor ring 51 and is fixedly connected to the bottom of the bottom frame 3. In this way, when the net 2 and the bottom frame 3 need to be lifted when checking the net 2 or harvesting the aquatic products, the outer cable 5 can be loosened while pulling the inner cable 4. In this way, the net 2 and the bottom frame 3 can be lifted, and the depth of the net cage can be lowered for harvesting or harvesting. The net 2 is maintained. On the contrary, if encountering other severe sea conditions such as typhoons or red tides, it is necessary to lower the operation area (cage) to a predetermined water layer below the sea surface to protect the aquaculture objects in the operation area. This requires sinking the entire cage below the water surface. At this time, the inner cable 4 can be loosened while the outer cable 5 is pulled, so that the net 2 and the bottom frame 3 can be pulled under the water surface. Finally, the net 2 and the bottom frame 3 are completely dropped under the water surface by their own weight. It should be noted that before the net 2 and the bottom frame 3 are pulled under the water surface, the main anchor ring 34 needs to be untied from the top of the pile 1. During the sinking process of the net 2 and the bottom frame 3, the main anchor ring 34 slides downward from the top of the pile 1 along the pile 1, and then sinks underwater. A diver can dive into the water to tie the main anchor ring 34 to the pile 1, or a rope for fixing and pulling up later can be tied to the main anchor ring 34 in advance during the descent.The net 2 is preferably kept in an optimal expanded state underwater so that the aquaculture objects in the aquaculture area 11 have sufficient aquaculture space, and a plurality of auxiliary anchor rings 12 are sleeved on the piles 1. The auxiliary anchor rings 12 are connected to the net 2 to pull the net 2 toward the piles 1. When the net 2 is raised or lowered, the plurality of auxiliary anchor rings 12 slide along the piles 1, so that the net 2 can be pulled toward the piles 1, so that the net 2 and the piles 1 fit tightly together so that the operation area has a larger space (generally, due to the effects of ocean currents and buoyancy, the net 2 cannot fit closely with the piles 1, resulting in a smaller operation area space). Moreover, due to the presence of the auxiliary anchor rings 12, during the sinking process of the net 2 and the bottom frame 3, the net 2 is always in close contact with the piles 1, so that during the descent adjustment process, the operating water body of the entire operation area remains almost unchanged, and even under the action of strong ocean currents, the net 2 can maintain a certain aquaculture volume, has good anti-ocean current deformation performance, and the cage floats on the sea surface for capture or daily inspection and other management, which takes a short time. The net 2 is short and does not need to be tied in multiple places. It should be noted that when the bottom of the bottom frame 3 is lower than the depth of the static anchor ring 51, the net 2 and the bottom frame 3 sink by their own weight. During this process, in order to ensure that the secondary anchor ring 12 can still maintain the restraining effect on the net 2 at different depths, so that the net 2 and the pile 1 fit together to ensure sufficient aquaculture volume, the inner diameter of the secondary anchor ring 12 is larger than the outer diameter of the static anchor ring 51, so as to ensure that when reaching a larger depth, the secondary anchor ring 12 can still play the role of restraining the net 2. Of course, if the depth of the static anchor ring 51 is sufficient, the bottom of the bottom frame 3 does not exceed the position of the static anchor ring 51, which is sufficient to make the net 2 completely sink in the water, and there is no need to consider this situation. Preferably, it is also necessary to consider that after the net 2 is completely sunk below the water surface, in order to prevent the aquaculture objects from leaving the aquaculture area from the top, a net cover 21 is further provided on the top of the net 2. Before the net 2 is lowered, the net cover 21 is quickly connected to the net 2 through the zipper of the net cover 21, so that the working area can be closed during the sinking process. ;

[0019] Preferably, the top of the pile 1 is also provided with a pulling device (not shown in the figure) that cooperates with the inner cable 4, the outer cable 5 and the main anchor ring 34 to facilitate auxiliary pulling during the rising or falling of the net 2 and the bottom frame 3. Furthermore, in order to reduce the performance requirements of the pulling device, the bottom frame 3 is a truss structure composed of a plurality of hollow tubes. The bottom frame 3 of the truss structure provides rigid support and protection for the bottom of the net 2, preventing the net 2 from directly contacting the seabed or being worn by seabed debris, and at the same time achieving the best expansion effect for the net 2. The plurality of hollow tubes are interconnected. A water storage chamber 31 is formed, a water hole 32 is opened at the bottom of the bottom frame 3 to match the water storage chamber 31, and an air vent 33 is opened at the top of the bottom frame 3 to match the water storage chamber 31. When the net 2 descends, seawater enters the water storage chamber 31 through the water hole 32, and the gas in the water storage chamber 31 is discharged through the air vent 33 to reduce buoyancy. When the net 2 rises, gas enters the water storage chamber 31 through the air vent 33, and the seawater in the water storage chamber 31 is discharged through the water hole 32 to increase buoyancy. In this process, the entry and exit of gas in the water storage chamber 31 also need to ensure airtightness, and also include The water storage chamber 31 cooperates with the vent pipe 6 and the air compressor, one end of the vent pipe 6 is connected to the air compressor, and the other end passes through a plurality of secondary anchor rings 12 and is connected to the vent hole 33, so that the air compressor can inflate and discharge air into the water storage chamber 31 through the vent pipe 6. At the same time, a water valve that cooperates with the water hole 32 is also provided on the bottom frame 3. The water valve is an electric valve or a pneumatic valve that can be remotely controlled. Specifically, when the air compressor inflates the water storage chamber 31 through the vent pipe 6, the water valve opens and the seawater in the water storage chamber 31 can be discharged, thereby increasing the buoyancy of the bottom frame 3. When the inflation is completed, the water valve is closed, thereby assisting the net 2 and the bottom frame 3 to rise; when the water storage chamber 31 is deflated through the vent pipe 6, the water valve is opened, and the water storage chamber 31 can use negative pressure to suck seawater, thereby reducing the buoyancy of the bottom frame 3. When the deflation is completed, the water valve is closed, thereby assisting the net 2 and the bottom frame 3 to sink. In this way, there is no need for a complicated winch, pulley block or external buoy system, which reduces the initial equipment cost and installation complexity. The lifting effect can be achieved by using a relatively low-power crane or even other handheld lifting devices.

[0020] In summary, the bottom frame 3, the vent pipe 6 and the air compressor constitute an auxiliary lifting buoyancy adjustment mechanism. Due to the presence of the main anchor ring 34 and the auxiliary anchor ring 12, the working area can be slid and adjusted along the pile column 1 while maintaining the same volume, so that the working area can be adjusted to different depths in the vertical direction. In this way, on the basis of the above-mentioned scheme (the net 2 is opened on the water surface for breeding or sunk underwater for risk avoidance), the net buoyancy can also be controlled by adjusting the air / water ratio in the water storage chamber 31. By controlling the air compressor and the water valve, the inflow and outflow of water in the water storage chamber 31 can be adjusted to be relatively smooth, so as to achieve the net 2 and the bottom frame. The bottom frame 3 can be raised and lowered relatively smoothly to avoid severe impact on the net 2 and the cultured objects. The bottom frame 3 can also be suspended at any intermediate depth in the culture area to adapt to the growth needs of different species of cultured objects (such as algae culture in the surface layer, fish culture in the middle layer, and shellfish culture in the bottom layer), maximize the use of vertical water space, and increase the yield per unit area. At the same time, when encountering storms or red tides, it can quickly dive to a safe depth; when light or feeding is needed, it floats to the shallow layer, improving the flexibility of culture. In this way, a composite and coordinated culture model of vertical stratification and dynamic environmental adaptation is realized, which is more suitable for the development of deep-sea aquaculture industry.

[0021] Example 2: Using the seawater aquaculture pile-based cage lifting system mentioned in Example 1, a method for using the system to lift cages is also included, which is used to set and control the seawater aquaculture pile-based cage lifting system as described above. The main steps are: first, select an aquaculture area and set the seawater aquaculture pile-based cage lifting system as described above under normal aquaculture conditions; specifically, setting the seawater aquaculture pile-based cage lifting system as described above under normal aquaculture conditions includes the following steps: S00: inserting a plurality of piles 1 into the seabed matrix to enclose an aquaculture area 11; S10: placing the net The bottom of the net 2 is fixedly connected to the bottom frame 3, a water valve is installed on the water hole 32 of the bottom frame 3, and the ventilation pipe 6 and the air compressor are connected to the ventilation hole 33. The combination of the net 2 and the bottom frame 3 is placed in the breeding area 11; S20: the top of the net 2 is connected to the top of the pile 1 through the main anchor ring 34, and the net 2 and the bottom frame 3 sink underwater under their own gravity; S30: the net 2 and the pile 1 are connected through a plurality of secondary anchor rings 12, so that the net 2 is in an expanded state in the breeding area 11, so as to pull the net 2 toward the pile 1, so that the net 2 and the pile 1 are tightly fitted; S4 0: Connect the inner cable 4 inside the net 2 and the outer cable 5 outside the net 2. The outer cable 5 passes through the static anchor ring 51 when connected. After the lifting system is set up, when the net 2 needs to be checked or the fish needs to be caught, the water hole 32 is opened, and air is injected into the water storage chamber 31 of the bottom frame 3 through the air compressor and the vent pipe 6. The seawater is discharged from the water storage chamber 31 through the water hole 32. When the water storage chamber 31 is full of air, the vent hole 33 and the water hole 32 are closed, the outer cable 5 is loosened, and the bottom frame 3 and the net 2 are lifted through the inner cable 4. When encountering severe sea conditions such as typhoons or red tides, When the net 2 is to be lowered, it is necessary to install the net cover 21 on the top of the net 2 in advance, open the water hole 32, and discharge the gas in the water storage chamber 31 through the air compressor and the vent pipe 6. Seawater enters the water storage chamber 31 through the water hole 32. After the gas in the water storage chamber 31 is emptied, the net 2 and the bottom frame 3 are lowered, the inner cable 4 is released, and the bottom frame 3 and the net 2 are pulled downward by the outer cable 5. Of course, when the outer cable 5 pulls the bottom frame 3 and the net 2 downward, the static anchor ring 51 should be used as the boundary. When the bottom of the bottom frame 3 is lower than the depth of the static anchor ring 51, the net 2 and the bottom frame 3 sink by their own weight.

[0022] The present invention is described through preferred embodiments. Those skilled in the art will appreciate that various modifications or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A marine aquaculture pile foundation cage lifting system, comprising a plurality of piles (1) inserted into a seabed matrix, wherein the plurality of piles (1) enclose an aquaculture area (11), characterized in that: A net (2) is provided in the breeding area (11), and the net (2) cooperates with a plurality of the piles (1) to enclose a net box with a breeding space. A bottom frame (3) is fixed at the bottom of the net (2) and cooperates with the breeding area (11). The bottom frame (3) is a truss structure composed of a plurality of hollow tubes, and the plurality of hollow tubes are interconnected to form a water storage cavity (31). A water flow passage is provided at the bottom of the bottom frame (3) and cooperates with the water storage cavity (31). The bottom frame (3) is provided with a vent hole (33) on the top thereof, which cooperates with the water storage chamber (31). When the net (2) descends, seawater enters the water storage chamber (31) through the water hole (32), and the gas in the water storage chamber (31) is discharged through the vent hole (33). When the net (2) ascends, the gas enters the water storage chamber (31) through the vent hole (33), and the seawater in the water storage chamber (31) is discharged through the water hole (32). The top of the net (2) is provided with a main anchor ring (34) that cooperates with the top of the pile (1); when the net (2) is in normal aquaculture, the connection height of the main anchor ring (34) on the pile (1) is higher than the lowest tide sea level (7); It also includes an inner cable (4) arranged inside the net (2), one end of the inner cable (4) is fixedly connected to the top of the bottom frame (3), and the other end is connected to the top of the pile (1).

2. A marine aquaculture pile foundation cage lifting system according to claim 1, characterized in that: It also includes an outer cable (5) arranged outside the net (2), and a static anchor ring (51) that cooperates with the outer cable (5) is also arranged on the pile (1) below the lowest tide sea level (7). One end of the outer cable (5) is connected to the top of the pile (1), and the other end passes through the static anchor ring (51) and is fixedly connected to the bottom of the bottom frame (3).

3. The marine aquaculture pile foundation cage lifting system according to claim 2, characterized in that: It also includes a plurality of auxiliary anchor rings (12) sleeved on the pile (1), wherein the auxiliary anchor rings (12) are connected to the net (2) to pull the net (2) toward the pile (1), and when the net (2) is raised or lowered, the plurality of auxiliary anchor rings (12) slide along the pile (1).

4. A marine aquaculture pile foundation cage lifting system according to claim 3, characterized in that: The top of the pile column (1) is also provided with a pulling device that cooperates with the inner cable (4), the outer cable (5) and the main anchor ring (34).

5. The marine aquaculture pile foundation cage lifting system according to claim 3, characterized in that: It also includes a vent pipe (6) and an air compressor that cooperate with the water storage chamber (31), one end of the vent pipe (6) is connected to the air compressor, and the other end passes through a plurality of the secondary anchor rings (12) and is connected to the vent hole (33).

6. The marine aquaculture pile foundation cage lifting system according to claim 4, characterized in that: The bottom frame (3) is also provided with a water valve that cooperates with the water hole (32).

7. The marine aquaculture pile foundation cage lifting system according to claim 1, characterized in that: A net cover (21) is also provided on the top of the net garment (2). When the net garment (2) is lowered, the net cover (21) is pre-connected to the net garment (2) via a zipper of the net cover (21).

8. A lifting method for a marine aquaculture pile foundation cage lifting system, used for setting and controlling the marine aquaculture pile foundation cage lifting system according to claims 1 to 7, characterized in that: First, a marine aquaculture pile foundation cage lifting system as described in claims 1 to 7 is set up in a normal aquaculture state in a selected aquaculture area; secondly, when the net (2) needs to be lifted for inspection or fish collection, the water hole (32) is opened, and air is injected into the water storage chamber (31) of the bottom frame (3) through the air compressor and the vent pipe (6), and the seawater is discharged from the water storage chamber (31) through the water hole (32); when the water storage chamber (31) is filled with air, the vent hole (33) and the water hole (32) are closed, and the outer cable (33) is loosened. 5), the bottom frame (3) and the net (2) are lifted by the inner cable (4); when the net (2) needs to be lowered due to severe sea conditions such as typhoons or red tides, the water hole (32) is opened, and the gas in the water storage chamber (31) is discharged through the air compressor and the vent pipe (6), and seawater enters the water storage chamber (31) through the water hole (32). After the gas in the water storage chamber (31) is emptied, the net (2) and the bottom frame (3) are lowered, the inner cable (4) is released, and the bottom frame (3) and the net (2) are pulled downward by the outer cable (5).

9. The method for lifting a marine aquaculture pile foundation cage lifting system according to claim 8, characterized in that: When the net (2) is lowered, it is necessary to set the net cover (21) on the top of the net (2) in advance.

10. The lifting method of a marine aquaculture pile foundation cage lifting system according to claim 8, characterized in that: Setting the marine aquaculture pile foundation cage lifting system according to claims 1 to 7 under normal aquaculture conditions comprises the following steps: S00: inserting a number of piles (1) into the seabed matrix to enclose a breeding area (11); S10: The bottom of the net (2) and the bottom frame (3) are fixedly connected, a water valve is installed on the water hole (32) of the bottom frame (3), and a ventilation pipe (6) and an air compressor are connected to the ventilation hole (33), and the combination of the net (2) and the bottom frame (3) is placed in the breeding area (11); S20: Connecting the top of the net (2) and the top of the pile (1) via the main anchor ring (34), and the net (2) and the bottom frame (3) sink underwater under their own gravity; S30: connecting the net (2) and the pile (1) via a plurality of secondary anchor rings (12), so that the net (2) is in an expanded state within the breeding area (11); S40: Connecting the inner cable (4) inside the net (2) and connecting the outer cable (5) outside the net (2), wherein the outer cable (5) passes through the static anchor ring (51) during connection.

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