Replacement device and cultivation ship

Abstract

The invention discloses a replacement device and a breeding boat, the replacement device comprises a pipe body, a valve, filter screens, a sealing cover structure and a control unit, the pipe body is of a lengthwise hollow structure, the filter screens are installed at the two ends of the pipe body respectively, the valve is arranged in the pipe body and located between the two filter screens, and the control unit is connected with the valve. The valve is electrically connected with the control unit so as to achieve communication of the two ends of the pipe body, the sealing cover structure is arranged at one end of the pipe body, the filter screen is arranged between the sealing cover structure and the valve, and the sealing cover structure, the valve and the filter screen are arranged at intervals; the sealing cover structure comprises a cover plate, and the cover plate is installed on the pipe body in a turnover mode so as to be opened or closed along with the effect of water flow. The seawater can automatically flow and replace without other energy sources, can be automatically realized, consumes less energy, and solves the problem of high energy consumption of seawater flow or seawater replacement in the traditional method.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture vessels, and in particular to a replacement device and aquaculture vessel. Background Art

[0002] As the fishery industry transforms towards high quality, deep-sea aquaculture vessels and large-scale intelligent aquaculture farms are gradually emerging. In the aquaculture environment of the above-mentioned aquaculture methods, the seawater in the aquaculture cabin is relatively closed and independent. In order to ensure the healthy growth of fish, increase the oxygen content of seawater, and effectively manage excrement and bait residues, simulating the flow of natural ocean currents and regularly replacing part of the seawater have become necessary measures. At present, multiple layers of multiple sprinkler heads and water inlet column structures are mainly configured inside the aquaculture cabin. The sprinkler heads are installed on the bulkheads at a certain tilt angle, and high-pressure seawater is sprayed to cause the seawater in the cabin to rotate and flow in a specific direction and speed. The water inlet column is responsible for continuously providing fresh seawater to the sprinkler heads (extracted from the sea outside the cabin), and excess seawater is discharged outside the cabin through the overflow device. This process requires regular cleaning of excrement and unconsumed bait. Both the flow of seawater and the replacement of seawater rely heavily on the power provided by the seawater pump, resulting in high energy consumption. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the seawater flow or seawater replacement in the existing aquaculture cabins is heavily dependent on the power provided by the seawater pump, resulting in high energy consumption.

[0004] In order to solve the above technical problems, the present invention provides a replacement device, including a tube body, a valve, a filter screen, a sealing structure and a control unit, wherein the tube body is a longitudinal hollow structure, and the filter screens are respectively installed at both ends of the tube body, the valve is arranged in the tube body and located between the two filter screens, the valve is electrically connected to the control unit to achieve communication between the two ends of the tube body, the sealing structure is arranged at one end of the tube body, and a filter screen is arranged between the sealing structure and the valve, and the sealing structure, the valve and the filter screen are all arranged at intervals; the sealing structure includes a cover plate, and the cover plate can be flipped and installed on the tube body to be opened or closed with the action of water flow.

[0005] Furthermore, the sealing structure also includes a limiting component, which is arranged on the inner wall of the tube body and located between the filter screen and the cover plate so as to fit with the cover plate when the cover plate is closed.

[0006] Furthermore, the limiting assembly includes a limiting ring and a sealing ring, the limiting ring is arranged on the inner wall of the tube body, and the sealing ring is installed on a side of the limiting ring facing the cover plate.

[0007] Furthermore, the sealing ring is semicircular.

[0008] Furthermore, the sealing structure also includes an ear plate and a rotating shaft. The ear plate is arranged on the inner wall of the tube body and is located on the side of the limiting assembly away from the filter screen. The cover plate and the ear plate are connected through the rotating shaft.

[0009] Furthermore, the cover plate includes a support tube, the interior of the cover plate is a hollow structure to form a partition of the cover plate, the support tube is located in the partition, and both ends of the support tube are respectively connected to two sides of the partition.

[0010] Furthermore, when the cover plate is completely submerged in seawater, the buoyancy it receives is 80% to 90% of its own weight.

[0011] Furthermore, the sealing ring is made of rubber material.

[0012] The present invention also provides a breeding boat, comprising a hull, a driving structure and a replacement device as described above, wherein the hull has a plurality of breeding cabins and a transverse bulkhead, wherein the plurality of breeding cabins are arranged at intervals along the length direction of the hull, and the transverse bulkhead is arranged between two adjacent breeding cabins, wherein the replacement device is arranged in the transverse bulkhead to connect the two adjacent breeding cabins, wherein the breeding cabin located near the bow of the hull is connected to the outside world through the replacement device, and the breeding cabin located near the stern of the hull is connected to the outside world through the replacement device.

[0013] Furthermore, there are multiple replacement devices, which are respectively arranged in the transverse bulkhead, the bow and the stern. The replacement device located at the bow is arranged in a one-to-one correspondence with the replacement device located in the transverse bulkhead, and the replacement device located at the stern is arranged in a one-to-one correspondence with the replacement device located in the transverse bulkhead; wherein,

[0014] The plurality of replacement devices located in the transverse bulkhead are arranged at intervals along the length direction of the transverse bulkhead, and the plurality of replacement devices are arranged at intervals along the width direction of the transverse bulkhead.

[0015] Compared with the prior art, the replacement device and the aquaculture boat according to the embodiment of the present invention have the following beneficial effects:

[0016] The cover plate of the embodiment of the present invention is opened or closed with the action of water flow. When the water flow pushes from a specific direction, the cover plate will be opened with the action of the water flow to allow seawater to enter and exit; when the water flow reverses or stops, the cover plate will be closed under the action of gravity and seawater to prevent backflow. The automatic flow and replacement of seawater in the device does not require other energy sources and can be achieved automatically with less energy consumption, thus solving the high energy consumption problem of seawater flow or seawater replacement in traditional methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of a breeding vessel provided by an embodiment of the present invention;

[0018] Figure 2 It is provided along the embodiment of the present invention Figure 1 Cross-sectional view in the AA direction;

[0019] Figure 3 is a cross-sectional view of a replacement device provided by an embodiment of the present invention;

[0020] Figure 4 is a side view of a replacement device provided by an embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of a valve opening state of a displacement device provided by an embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of a horizontal flow state of a displacement device provided by an embodiment of the present invention, wherein the arrows in the figure indicate the flow direction of water;

[0023] Figure 7 is a schematic diagram of an inclined flow state of a displacement device provided by an embodiment of the present invention, wherein the arrows in the figure indicate the flow direction of water;

[0024] Figure 8 is a schematic diagram of a tilted closed state of a replacement device provided by an embodiment of the present invention;

[0025] Fig. 9 is a schematic diagram of a valve closed state of a replacement device provided by an embodiment of the present invention;

[0026] In the figure, 1. displacement device; 11. pipe body; 12. valve; 13. filter screen; 14. sealing structure; 141. cover plate; 1411. support tube; 1412. partition; 142. limit assembly; 1421. limit ring; 1422. sealing ring; 143. ear plate; 144. rotating shaft; 2. hull; 21. breeding cabin; 22. transverse bulkhead; 3. driving structure. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] like Figure 3As shown, the present invention provides a breeding boat, including a replacement device 1, which is used to connect to a breeding cabin 21 or the external environment, and includes a pipe body 11, a valve 12, a filter screen 13, a cover structure 14 and a control unit. The pipe body 11 is a longitudinal hollow structure, which is used to guide the flow of seawater. Its internal space allows water to flow therein, and provides installation positions for other components (such as valve 12, filter screen 13, etc.). Filter screens 13 are installed at both ends of the pipe body 11 to block larger particles from entering or leaving the breeding cabin 21, preventing these substances from damaging the equipment or polluting the environment. At the same time, the filter 13 helps to keep the water quality in the breeding cabin 21 clean and ensure the healthy growth of fish. The valve 12 is arranged in the pipe body 11 and is located between the two filter nets 13. The valve 12 is electrically connected to the control unit to receive instructions from the control unit to open or close, so as to achieve the connection between the two ends of the pipe body 11, so as to accurately control the inflow and outflow of seawater as needed, and reduce unnecessary energy waste. A cover structure 14 is arranged at one end of the pipe body 11, and a filter net 13 is arranged between the cover structure 14 and the valve 12. The cover structure 14, the valve 12 and the filter net 13 are arranged at intervals; the cover structure 14 includes a cover plate 141, which can be flipped and installed on the pipe body 11 to open or close with the action of water flow. When the water flow is pushed from a specific direction, the cover plate 141 will open with the action of the water flow to allow seawater to enter and exit; and when the water flow is reversed or stopped, the cover plate 141 will be closed under the action of gravity and seawater to prevent backflow, simplifying the operation process, and also reducing the risk of mechanical failure.

[0029] The cover 141 of the present embodiment is opened or closed with the action of water flow. When the water flow pushes from a specific direction, the cover 141 will be opened with the action of the water flow to allow seawater to enter and exit. When the water flow reverses or stops, the cover 141 will be closed under the action of gravity and seawater to prevent backflow. The automatic flow and replacement of seawater in this device does not require other energy sources and can be achieved automatically with less energy consumption, thus solving the high energy consumption problem of seawater flow or seawater replacement in traditional methods.

[0030] See also Figure 1 and Figure 2The breeding boat also includes a hull 2 ​​and a driving structure 3. The hull 2 ​​is the main frame of the entire ship, and the driving structure 3 is used to provide power so that the ship can sail on the water; the hull 2 ​​has a plurality of breeding cabins 21 and a transverse bulkhead 22. The plurality of breeding cabins 21 are arranged at intervals along the length direction of the hull 2 ​​and are used to raise aquatic organisms, such as fish or other marine organisms. Each breeding cabin 21 can be regarded as an independent small breeding farm, and the environmental conditions can be adjusted as needed to adapt to organisms of different types or growth stages. The breeding cabins 21 in this embodiment are used to raise organisms of the same type, and a transverse bulkhead 22 is provided between two adjacent breeding cabins 21 to separate each breeding cabin 21; a displacement device 1 is provided in the transverse bulkhead 22 to connect two adjacent breeding cabins 21 to control and manage the flow of water and organisms between different breeding cabins 21. Through the displacement device 1, two adjacent breeding cabins 21 can be connected to each other, allowing water exchange or allowing seawater microorganisms and algae to migrate from one cabin to another. A cabin, a breeding cabin 21 located near the bow of the hull 2 ​​is connected to the outside world through a displacement device 1, and a breeding cabin 21 located near the stern of the hull 2 ​​is connected to the outside world through a displacement device 1, that is, the breeding cabin 21 located near the bow (bow) and the stern (stern) can be directly connected to the external waters through the displacement device 1, so that the breeding cabin 21 can directly or indirectly obtain fresh seawater from the natural environment and discharge wastewater to keep the water fresh, which is conducive to the healthy growth of organisms, so that low-concentration excrement and bait residues (meeting the direct discharge standard) in the breeding cabin 21 can be automatically discharged in time, with a slow accumulation speed, and low frequency and cost of regular removal.

[0031] This embodiment provides an offshore aquaculture platform, which enables farmers to carry out aquaculture activities in a relatively closed but controllable environment, while ensuring good water quality management and proper isolation between organisms, thereby improving aquaculture efficiency and product quality.

[0032] Specifically, when the seawater in the aquaculture cabin 21 needs to flow and be replaced naturally with the ocean currents and waves and the propulsion power of the ship, the control units of all the replacement devices 1 in the whole ship are started synchronously and remotely, so that all valves 12 are in an open state, so as to prepare for the flow and replacement of the seawater in the aquaculture cabin 21 (such as Figure 5 shown).

[0033] After all valves 12 are opened, when the device is in a horizontal state, part of the seawater in the sea area where the ship is located will automatically open the cover plates 141 of all displacement devices 1 towards the stern of the ship (such as Figure 6As shown in FIG. 1 , the seawater flows from the bow to the stern along the displacement device 1, the aquaculture tank 21, the transverse tank 22 and the displacement device 1 in sequence, realizing the automatic flow and displacement of the seawater in the aquaculture tank 21; when the ship is in a state where the bow is high and the stern is low under the action of waves, the displacement device 1 is also in an inclined state (as shown in FIG. 1 ). Figure 7 As shown in the figure, part of the seawater in the sea area where the ship is located automatically opens the covers 141 of all the displacement devices 1 toward the stern under the action of the ship's driving force or the impact of the ocean current and the gravity of the covers 141 and the seawater, and the seawater flows in sequence from the bow to the stern along the displacement device 1, the breeding cabin 21, the transverse compartment 22 and the displacement device 1, realizing the automatic flow and displacement of the seawater in the breeding cabin 21, and realizing the unidirectional flow of the seawater in the displacement device 1 and the breeding cabin 21.

[0034] Then, as the ship is in a state of high stern and low bow under the action of waves (such as Figure 8 As shown in the figure, the displacement device 1 is also in a tilted state, and the cover plates 141 of all displacement devices 1 are automatically closed toward the bow due to the gravity of part of the seawater in the sea area where the ship is located and the gravity of the cover plates 141, so that the flow and displacement of seawater in the displacement device 1 are temporarily stopped, and the displacement of seawater in the breeding cabin 21 is also temporarily stopped synchronously. At the same time, the flow of seawater between the breeding cabins 21 is also temporarily stopped synchronously to prevent the seawater in the displacement device 1 and the breeding cabin 21 from flowing in the opposite direction.

[0035] As the waves act periodically on the ship, all the displacement devices 1 repeat the above-mentioned actions, and under the action of all the cover plates 141, the periodic unidirectional flow and displacement of the seawater in the breeding cabin 21 are realized.

[0036] It can be understood that when the seawater quality, marine environmental conditions (such as super cold currents, typhoons, huge waves, etc.) and special breeding stages (bait placement and feeding stage, disinfection and sterilization stage, collection of high-concentration excrement and bait residue stage, centralized harvesting of breeding products stage, etc.) of the sea area where the ship is located do not meet the automatic replacement conditions, the control units of all the replacement devices 1 of the whole ship are synchronously remotely started to put all valves 12 in a closed state (such as Fig. 9 As shown in the figure, the flow and displacement of seawater in the displacement device 1 are temporarily stopped, and the displacement of seawater in the breeding cabin 21 is also temporarily stopped synchronously. At the same time, the flow of seawater between the breeding cabins 21 is also temporarily stopped synchronously.

[0037] This embodiment makes full use of ocean currents and wave energy to realize the flow and replacement of seawater in the aquaculture cabin 21. It can be realized automatically without the intervention of a seawater pump, with low comprehensive aquaculture cost, fast replacement speed, high efficiency, high oxygen concentration in the aquaculture cabin 21, no need for artificial oxygenation, and low cost. In addition, because it is directly connected to the external sea area and replaced with the flow of seawater, the quality of seawater in the aquaculture cabin 21 and the aquaculture environment are slightly different from the actual environmental conditions of the sea area, and the taste and quality of aquacultured seafood and wild seafood are slightly different. At the same time, the concentration of microorganisms and algae in the seawater in the aquaculture cabin 21 is equivalent to that in the sea area, and marine microorganisms and algae can be fully utilized as natural bait, with low bait cost and high aquaculture efficiency.

[0038] Furthermore, the cover structure 14 further includes a stopper assembly 142 , which is disposed on the inner wall of the tube body 11 and located between the filter screen 13 and the cover plate 141 so as to fit with the cover plate 141 when the cover plate 141 is closed.

[0039] The position limiting assembly 142 of this embodiment ensures that a good sealing surface can be formed when the cover plate 141 is closed, preventing seawater from leaking from places where it should not flow, so as to maintain the stability of the water quality in the breeding cabin 21 and prevent the reverse flow of seawater across the cabin in the breeding cabin 21. In addition, this embodiment uses natural tides, waves and other marine power resources to drive the flow of seawater instead of relying on mechanical pumping, and cooperates with the position limiting assembly 142 to enable the cover plate 141 to accurately return to its preset closed position.

[0040] Furthermore, the limiting assembly 142 includes a limiting ring 1421 and a sealing ring 1422. The limiting ring 1421 is arranged on the inner wall of the tube body 11 as a physical barrier to limit the movement range of the cover 141, ensuring that it can accurately dock at a preset position when closed, helping to prevent the cover 141 from shifting due to water impact or other external forces, thereby ensuring consistency and accuracy each time it is closed. The sealing ring 1422 is installed on the side of the limiting ring 1421 facing the cover 141, that is, the part that will directly contact when the cover 141 is closed, providing an elastic contact surface. When the cover 141 is closed and contacts the limiting ring 1421, the sealing ring 1422 can be compressed and deformed to fill the tiny gap between the two to form an effective watertight seal. At the same time, it can absorb the impact force when the cover 141 is closed, and reduce the direct metal-to-metal friction between the cover 141 and the limiting ring 1421, thereby extending the service life of the components.

[0041] Furthermore, the sealing ring 1422 is semicircular, and the semicircular design ensures that there is sufficient contact area between the sealing ring 1422 and the cover plate 141 and the limiting ring 1421. When the cover plate 141 is closed and fits with the limiting ring 1421, the semicircular sealing ring 1422 can be evenly compressed and deformed inward when subjected to pressure, forming a larger elastic contact area to fill any small gap between the cover plate 141 and the limiting ring 1421, so that the sealing ring 1422 can maintain effective sealing under different pressure conditions, and can prevent seawater leakage even under high pressure or high flow conditions.

[0042] Furthermore, the sealing ring 1422 is made of rubber material, which has excellent elasticity and recovery ability. When compressed, it can deform to fill any tiny gaps, and can quickly return to its original shape after the pressure is released, ensuring that it fits tightly against the limiting ring 1421 when the cover 141 is closed, effectively preventing seawater leakage and ensuring the stability of the water quality in the breeding cabin 21.

[0043] Read also Figure 4 The cover structure 14 also includes an ear plate 143 and a rotating shaft 144. The ear plate 143 is arranged on the inner wall of the tube body 11 and is located on the side of the limiting component 142 away from the filter screen 13 to ensure that the various components do not interfere with each other and can work together correctly. The cover plate 141 and the ear plate 143 are connected by the rotating shaft 144, so that the cover plate 141 can rotate around the rotating shaft 144 to open or close the cover.

[0044] This embodiment provides an operable sealing mechanism, so that the cover 141 can be opened or closed under the action of seawater, while ensuring that when the cover 141 is in a closed state, it can firmly seal the tube body 11 to prevent internal substances from leaking or external impurities from entering.

[0045] Furthermore, the cover plate 141 includes a support tube 1411 . The interior of the cover plate 141 is a hollow structure to form a partition 1412 of the cover plate 141 . The support tube 1411 is located in the partition 1412 , and both ends of the support tube 1411 are respectively connected to two sides of the partition 1412 .

[0046] The support tube 1411 of this embodiment can increase the overall rigidity of the cover plate 141, prevent deformation under the action of external pressure or force, and ensure that the distance between the front and rear shell plates of the cover plate 141 (i.e., the two surfaces of the cover plate 141) remains constant and will not change due to external forces. Compared with the solid structure, the hollow structure can reduce the amount of material used while ensuring sufficient strength, thereby reducing the overall weight, so that the cover plate 141 can flexibly realize the opening and closing action under the action of its own gravity and the impact force of the water flow.

[0047] Furthermore, when the cover plate 141 is completely submerged in the seawater, the buoyancy it receives is 80% to 90% of its own weight. Since the buoyancy almost offsets most of the weight of the cover plate 141, the impact force of the water flow can more easily push or pull the cover plate 141, so that it can quickly respond to the dynamic changes of the water flow and achieve rapid opening or closing. At the same time, because the buoyancy does not completely offset the gravity, the cover plate 141 still has a sufficient "anchoring" effect to prevent frequent misoperation due to slight water flow fluctuations, ensuring that the switch action will only occur under the action of a sufficiently strong water flow. In this embodiment, the buoyancy received by the cover plate 141 when it is completely submerged in the seawater is designed to be 80% to 90% of its own weight, ensuring that the cover plate 141 can flexibly achieve the switch action under the action of its own weight and the impact force of the water flow.

[0048] Furthermore, there are multiple replacement devices 1, and the multiple replacement devices 1 are respectively arranged in the transverse bulkhead 22, the bow and the stern. The replacement device 1 located at the bow is arranged in a one-to-one correspondence with the replacement device 1 located in the transverse bulkhead 22, and the replacement device 1 located at the stern is arranged in a one-to-one correspondence with the replacement device 1 located in the transverse bulkhead 22; wherein, the multiple replacement devices 1 located in the transverse bulkhead 22 are arranged at intervals along the length direction of the transverse bulkhead 22, and the multiple replacement devices 1 are arranged at intervals along the width direction of the transverse bulkhead 22, which optimizes the fluid dynamics performance, ensures uniformly distributed pressure or flow, improves the efficiency and safety of seawater flow and seawater replacement in the breeding cabin 21, and can more effectively manage resource allocation when exchanging liquids, while ensuring the stability of the breeding cabin 21 under different operating conditions.

[0049] It should be noted that the aquaculture vessel also has a filtering device, which is arranged in the transverse compartment 22 and is arranged corresponding to the corresponding aquaculture cabin 21. When the high-concentration excrement and bait residues (exceeding the direct discharge standard) in the aquaculture cabin 21 need to be discharged, firstly, the control units of all the replacement devices 1 of the whole ship are synchronously remotely started, so that all valves 12 are in a closed state, and then the seawater circulation filtering device in the aquaculture cabin 21 is started, and the seawater containing excrement and bait residues is gradually drawn from the bottom of the aquaculture cabin 21 to the filtering device for filtration and then discharged to the top of the aquaculture cabin 21 (the garbage generated in the process is collected, stored and properly handled in time), until the concentration of excrement and bait residues in the aquaculture cabin 21 reaches the direct discharge standard, the control units of all the replacement devices 1 can be opened, the valves 12 can be opened, and the automatic flow and replacement of the seawater in the aquaculture cabin 21 can be restored.

[0050] In summary, the embodiment of the present invention provides a replacement device 1 and a breeding boat, wherein the cover 141 is opened or closed with the action of water flow. When the water flow pushes from a specific direction, the cover 141 will be opened with the action of the water flow to allow seawater to enter and exit. When the water flow reverses or stops, the cover 141 will be closed under the action of gravity and seawater to prevent backflow. The automatic flow and replacement of seawater in the device does not require other energy sources and can be achieved automatically, consuming less energy, thereby solving the high energy consumption problem of seawater flow or seawater replacement in traditional methods.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A replacement device, characterized in that: It includes a tube body, a valve, a filter screen, a sealing structure and a control unit. The tube body is a longitudinal hollow structure. The filter screens are installed at both ends of the tube body respectively. The valve is arranged in the tube body and located between the two filter screens. The valve is electrically connected to the control unit to achieve communication between the two ends of the tube body. The sealing structure is arranged at one end of the tube body, and a filter screen is arranged between the sealing structure and the valve. The sealing structure, the valve and the filter screen are all arranged at intervals. The sealing structure includes a cover plate, which can be flipped and installed on the tube body to be opened or closed with the action of water flow.

2. The replacement device according to claim 1, characterized in that The sealing structure further comprises a limiting component, which is arranged on the inner wall of the tube body and located between the filter screen and the cover plate so as to fit with the cover plate when the cover plate is closed.

3. The replacement device according to claim 2, characterized in that The limiting assembly comprises a limiting ring and a sealing ring. The limiting ring is arranged on the inner wall of the tube body, and the sealing ring is installed on a side of the limiting ring facing the cover plate.

4. The replacement device according to claim 3, characterized in that The sealing ring is semicircular.

5. The replacement device according to claim 2, characterized in that: The sealing structure further includes an ear plate and a rotating shaft. The ear plate is arranged on the inner wall of the tube body and is located on the side of the limiting assembly away from the filter screen. The cover plate and the ear plate are connected via the rotating shaft.

6. The replacement device according to claim 1, characterized in that The cover plate includes a support tube. The interior of the cover plate is a hollow structure to form a partition of the cover plate. The support tube is located in the partition, and two ends of the support tube are respectively connected to two sides of the partition.

7. The replacement device according to claim 1 or 6, characterized in that: When the cover plate is completely submerged in seawater, the buoyancy it receives is 80% to 90% of its own weight.

8. The replacement device according to claim 3 or 4, characterized in that: The sealing ring is made of rubber material.

9. A breeding vessel, characterized in that: It includes a hull, a driving structure and a replacement device as described in any one of claims 1 to 8, the hull has a plurality of breeding cabins and a transverse partition, the plurality of breeding cabins are arranged at intervals along the length direction of the hull, and the transverse partition is arranged between two adjacent breeding cabins, the replacement device is arranged in the transverse partition to connect the two adjacent breeding cabins, the breeding cabin located near the bow of the hull is connected to the outside world through the replacement device, and the breeding cabin located near the stern of the hull is connected to the outside world through the replacement device.

10. The aquaculture vessel according to claim 9, characterized in that: There are multiple replacement devices, which are respectively arranged in the transverse bulkhead, the bow and the stern. The replacement device located at the bow is arranged one-to-one with the replacement device located in the transverse bulkhead, and the replacement device located at the stern is arranged one-to-one with the replacement device located in the transverse bulkhead; wherein, The plurality of replacement devices located in the transverse bulkhead are arranged at intervals along the length direction of the transverse bulkhead, and the plurality of replacement devices are arranged at intervals along the width direction of the transverse bulkhead.

Images