A water circulation system for aquaculture water for a culture factory ship

Abstract

The present application relates to fish farming technical field, disclose a kind of water circulation system of water for aquaculture for aquaculture factory ship, including aquaculture cabin, water delivery mechanism and filter device, the top of one side of aquaculture cabin is connected with drain port, the bottom of the other side of aquaculture cabin is connected with water inlet, and the water outlet of water delivery mechanism is connected with water inlet;The present application is formed by multiple groups of parallel filter units that elastic column, elastic filter hair and partition rod are staggered, and multiple groups of through slot one that shell side wall is symmetrically opened are cooperated, on the one hand, efficient pretreatment filtration of seawater is realized, can effectively remove plankton, silt, organic debris and other impurities in marine water body, avoid its into aquaculture cabin and pollute water quality or affect the health of aquaculture organism, satisfy the cleaning demand of aquaculture water;On the other hand, when filter device is not used, ocean current can be washed through through slot one to the impurities adhered on elastic column, elastic filter hair and partition rod, and the attachment and accumulation of impurities on filter structure are greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fish farming, in particular to a water circulation system for farming water of a fish farming vessel. BACKGROUND

[0002] The fish farming vessel is a modern marine farming equipment with mobility. It takes a large ship as the main platform, and through the closed farming cabin, water circulation treatment system, environmental control equipment (such as temperature control and oxygenation device), and supporting feeding, monitoring, and fishing facilities, it can carry out fish and other aquaculture in the open sea or open water. It can break away from the space and environmental constraints of near-shore farming, and through self-regulation of water quality and resistance to harsh sea conditions, it can achieve stable farming throughout the year while reducing pollution to the surrounding sea area. It is the core equipment for promoting the development of deep-sea farming industry.

[0003] The farming cabin needs to be matched with a professional water circulation system to realize dynamic updating of the farming water. Through bidirectional water flow regulation, the system can extract external marine water into the farming cabin and timely discharge the used water in the cabin, thereby ensuring the water quality cleanliness, dissolved oxygen concentration stability, and effective discharge of harmful metabolic waste (such as leftover feed, feces, and ammonia nitrogen) in the farming environment, and providing suitable living and growing conditions for the farming organisms.

[0004] When seawater is input into the farming cabin, it needs to be pretreated and filtered to remove impurities such as plankton, silt, and organic debris that may exist in the marine water, so as to avoid pollution of the water quality or affect the health of the farming organisms. The current mainstream technology in the industry mostly uses filter screen filtering scheme, but this scheme has obvious limitations in long-term operation: first, the filter screen pores are easily clogged by impurities, which leads to a decrease in water inflow and a decrease in filtering efficiency, directly affecting the overall operation stability of the water circulation system; second, some small impurities may be embedded in the filter screen pores, and conventional flushing methods cannot completely clean them, so the filter screen needs to be disassembled and cleaned or replaced regularly, which not only increases the labor maintenance cost, but also affects the continuity of farming operations due to system downtime, and the convenience is poor.

[0005] Therefore, it is necessary to provide a water circulation system for farming water of a fish farming vessel to solve the above technical problems. SUMMARY

[0006] The present application aims to provide a water circulation system for farming water of a fish farming vessel, which solves the problem of filter screen pores being easily clogged in the traditional filter screen filtering scheme, leading to a decrease in water inflow and a decrease in filtering efficiency, and ensures the stability of the overall operation of the water circulation system.

[0007] The technical purposes are achieved by the following technical scheme: a water circulation system for aquaculture water of an aquaculture factory ship, comprising an aquaculture cabin, a water conveying mechanism and a filtering device, a water outlet is symmetrically arranged on the top of one side of the aquaculture cabin, a water inlet is symmetrically arranged on the bottom of the other side of the aquaculture cabin, the water outlet of the water conveying mechanism is connected with the water inlet, and the filtering device is arranged on the water inlet of the water conveying mechanism.

[0008] Further, one side of the shell is connected with a connecting pipe one and a connecting pipe two, the connecting pipe two is above the connecting pipe one, and a plurality of groups of through grooves two are symmetrically arranged on the opposite side walls of the shell and are above the through grooves one.

[0009] Further, the water conveying mechanism comprises a water pump, a three-way valve, a water conveying pipe one, a water conveying pipe two and a water conveying pipe three, the three-way valve is provided with an interface one, an interface two and an interface three, one end of the water conveying pipe one is connected with the water inlet on the aquaculture cabin, the other end of the water conveying pipe one is connected with the interface one, one end of the water conveying pipe two is connected with the interface two, the other end of the water conveying pipe two is connected with the connecting pipe two, one end of the water conveying pipe three is connected with the water inlet of the water pump, the other end of the water conveying pipe three is connected with the connecting pipe one, and the water outlet of the water pump is connected with the interface three.

[0010] Further, the bottom of the elastic column is hemispherical, and a plurality of hemispherical grooves matched with the bottom of the elastic column are arranged on the top of the bottom plate.

[0011] Further, a plurality of magnetic strips are embedded in the bottom plate, the magnetic strips are arranged in parallel, the hemispherical grooves are above the magnetic strips, and the bottom of the elastic column is magnetically attracted to the magnetic strips.

[0012] A further feature of the present invention is that: a flow-diverting cavity is provided inside the lifting plate, the elastic column is hollow, the flow-diverting cavity is connected to the inner cavity of the elastic column, a cylinder is fixedly installed on the top wall of the lifting plate, a piston is slidably installed inside the cylinder, the cylinder is connected to the flow-diverting cavity, the cylinder, the flow-diverting cavity and the elastic column are all filled with oil, and a transmission component for driving the piston to rise and fall is provided on the cylinder.

[0013] A further configuration of the present invention is as follows: the transmission assembly includes a screw, a nut, and a transmission rod; the nut is fixedly connected to the top wall of the cylinder; the screw passes through the nut and is threadedly connected to the nut; the bottom end of the screw is rotatably connected to the piston; a support frame is fixedly installed on the top wall of the cylinder; a transmission rod is rotatably installed on the support frame; the bottom end of the transmission rod extends into the screw, and the transmission rod and the screw slide vertically in cooperation; a limit strip is fixedly installed on the outer peripheral wall of the transmission rod, and the limit strip slides vertically in cooperation with the screw; and a drive assembly for driving the transmission rod to rotate is provided on the support frame.

[0014] A further configuration of the present invention is as follows: the drive assembly includes a rotating shaft, a spur gear, a first bevel gear, and a second bevel gear. The rotating shaft is rotatably mounted on the top of the support frame and is horizontally positioned. The two ends of the rotating shaft are respectively fixedly fitted with a spur gear and a second bevel gear. The top end of the transmission rod is fixedly fitted with a first bevel gear, which meshes with the second bevel gear. A rack adapted to the spur gear is fixedly installed on the inner wall of the top wall of the housing.

[0015] A further feature of the present invention is that a plurality of reinforcing ribs are embedded inside the elastic column, and the plurality of reinforcing ribs are arranged in a ring array with the axis of the elastic column as the array center.

[0016] A further provision of the present invention is that a hydraulic cylinder is fixedly installed on the top wall of the housing, the output end of the hydraulic cylinder penetrates through the top wall of the housing, and the output end of the hydraulic cylinder is fixedly connected to the lifting plate.

[0017] In summary, the present invention has the following beneficial effects: The present invention consists of multiple sets of parallel filtration units formed by the interlacing of elastic columns, elastic filter hairs, and partition rods, and is combined with multiple sets of through grooves symmetrically opened on the side wall of the shell. On the one hand, it achieves efficient pre-treatment filtration of seawater, effectively removing impurities such as plankton, silt, and organic debris from marine water, preventing them from entering the aquaculture tank and polluting the water quality or affecting the health of aquaculture organisms, thus meeting the cleanliness requirements of aquaculture water. On the other hand, when the filtration device is not in use, ocean currents can pass through the through grooves to wash away impurities attached to the elastic columns, elastic filter hairs, and partition rods, greatly reducing the adhesion and accumulation of impurities on the filtration structure. This effectively solves the problem of easy clogging of filter screen pores in traditional filter screen filtration schemes, which leads to a decrease in influent flow and a reduction in filtration efficiency, ensuring the overall stability of the water circulation system.

[0018] This invention utilizes a liftable lifting plate, a retractable elastic column structure, and a water delivery mechanism consisting of a water pump, a three-way valve, and multi-section water pipes. When backwashing of the filter device is required, the lifting plate can move the separator rod out from between the elastic columns, increasing the gap between them. Simultaneously, a transmission component drives a piston to move and extract oil, causing the elastic columns to retract, facilitating the removal of impurities from the columns and filter fibers. The water delivery mechanism also enables reverse water flow flushing, thoroughly cleaning impurities from the filter structure. This eliminates the need for periodic disassembly for deep cleaning or replacement, reducing maintenance costs and preventing disruptions to aquaculture operations due to system downtime. It effectively addresses the poor usability of traditional filter screen solutions. Furthermore, during filtration, the magnetic attraction of the elastic columns at their base, the positioning effect of the hemispherical grooves, and the filling with oil maintain the columns' diameter, ensuring stable filtration gaps and further guaranteeing filtration efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the filtration device of the present invention;

[0021] Figure 3 This is a cross-sectional view of the filtration device of the present invention;

[0022] Figure 4 This is a schematic diagram of the lifting plate and elastic column of the present invention;

[0023] Figure 5 This is a cross-sectional view of the lifting plate and cylinder of the present invention;

[0024] Figure 6 This is a cross-sectional structural schematic diagram of the cylinder, transmission assembly, and drive assembly of the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the independent cleaning mechanism of the present invention;

[0026] Figure 8 This is a top view of the base plate and the partition bar of the present invention;

[0027] Figure 9 This is a cross-sectional structural diagram of the elastic column of the present invention.

[0028] In the diagram: 1. Breeding tank; 101. Drainage outlet; 102. Water inlet; 2. Water pump; 3. Three-way valve; 301. Interface 1; 302. Interface 2; 303. Interface 3; 4. Water supply pipe 1; 5. Water supply pipe 2; 6. Water supply pipe 3; 7. Filter device; 8. Shell; 801. Through groove 1; 802. Connecting pipe 1; 803. Connecting pipe 2; 804. Through groove 2; 805. Bottom plate; 806. Hemispherical concave... 9. Slot; 10. Lifting plate; 11. Diverting chamber; 12. Hydraulic cylinder; 13. Elastic column; 14. Elastic filter bristles; 15. Reinforcing rib; 16. Dividing rod; 17. Cylinder barrel; 18. Piston; 19. Nut; 20. Screw; 21. Transmission rod; 22. Limiting strip; 23. Support frame; 24. Bevel gear one; 25. Rotating shaft; 26. Bevel gear two; 27. Spur gear; 28. Rack; 29. ​​Magnetic strip. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] Please see Figures 1-8In this embodiment of the invention, a water circulation system for aquaculture water on an aquaculture vessel includes an aquaculture tank 1, a water conveying mechanism, and a filtration device 7. A drain outlet 101 is connected to the top of one side of the aquaculture tank 1, and a water inlet 102 is connected to the bottom of the other side of the aquaculture tank 1. The outlet of the water conveying mechanism is connected to the water inlet 102. The filtration device 7 is located at the water inlet of the water conveying mechanism. The filtration device 7 includes a housing 8, a lifting plate 9 disposed inside the housing 8, and multiple parallel filtration units. Water inlet gaps are provided between the multiple filtration units. Multiple sets of through grooves 801 are symmetrically opened on both opposite sidewalls of the housing 8. The assembly includes multiple through channels 801, which are connected to multiple filter gaps. A base plate 805 is provided at the bottom of the housing 8. The filter unit includes multiple elastic columns 11 fixedly installed on the bottom wall of the lifting plate 9 and multiple partition rods 12 fixedly installed on the top wall of the base plate 805. Multiple elastic filter fibers 1101 are fixedly installed on the outer wall of the elastic columns 11. The elastic columns 11, elastic filter fibers 1101, and partition rods 12 within the same filter unit are distributed on the same vertical plane, with the elastic columns 11 and partition rods 12 arranged alternately. The elastic columns 11 and elastic filter fibers 1101 can be made of chlorinated butyl rubber or... EPDM rubber; In practical use, seawater enters the housing 8 through multiple sets of channels 801, and is filtered through the filtration gaps formed between the elastic pillars 11, elastic filter bristles 1101, and partition rods 12. The filtered seawater is then transported to the aquaculture tank 1 via a water conveying mechanism. Through multiple parallel filtration units and multiple water inlet gaps, seawater enters multiple water passages through the channels 801, and then passes through at least one filtration unit before entering the water conveying mechanism. This ensures that multiple filtration units can filter the seawater, reducing filtration pressure. Furthermore, the symmetrically arranged channels 801 allow the filtration system to... When the filter 7 is not in use, the ocean current passing through the channel 801 can wash away the impurities attached to the elastic columns 11, elastic filter hairs 1101, and separator rods 12, thereby reducing the maintenance frequency of the filter device 7. When the filter device 7 needs to be backwashed, the lifting plate 9 is driven to move upward. When the lifting plate 9 moves upward, it drives multiple sets of elastic columns 11 to move upward, so that the separator rods 12 move out from between the elastic columns 11, thereby creating a larger gap between the elastic columns 11. Impurities are more likely to fall off the elastic columns 11 and elastic filter hairs 1101, thus making the subsequent backwashing effect of the elastic columns 11 better.

[0031] In this embodiment, preferably, a connecting pipe 1 802 and a connecting pipe 2 803 are connected to one side of the housing 8, with the connecting pipe 2 803 located above the connecting pipe 1 802. Multiple sets of through grooves 2 804 are symmetrically formed on both opposite sidewalls of the housing 8, with each set of through grooves 2 804 located directly above the multiple sets of through grooves 1 801. The water supply mechanism includes a water pump 2, a three-way valve 3, a water supply pipe 1 4, a water supply pipe 2 5, and a water supply pipe 3 6. The three-way valve 3 is provided with an interface 1 301, an interface 2 302, and an interface 3 303. One end of the water supply pipe 1 4 is connected to the water inlet 102 on the aquaculture chamber 1, and the other end of the water supply pipe 1 4 is connected to an interface 1 301. One end of the water supply pipe 2 5 is connected to an interface 2 302, and the other end of the water supply pipe 2 5 is connected to the connecting pipe 2 802. 803 is connected. One end of the water supply pipe 36 is connected to the inlet of the water pump 2, and the other end of the water supply pipe 36 is connected to the connecting pipe 1 802. The outlet of the water pump 2 is connected to the interface 303. The three-way valve 3 has two states. In state one, the interface 303 is connected to the interface 1 301, and the interface 2 302 is closed. When the water pump 2 is turned on, seawater enters the water supply pipe 1 4 through the water supply pipe 36, and then enters the aquaculture tank 1 through the inlet 102 to replenish and change the water in the aquaculture tank 1. In state two, the interface 2 302 is connected to the interface 303, and the interface 1 301 is closed. When the water pump 2 is turned on, seawater enters the water supply pipe 2 5 through the water supply pipe 36, and enters the housing 8 through the connecting pipe 2 803 to backwash the elastic column 11 and the elastic filter 1101.

[0032] In this embodiment, preferably, the bottom of the elastic column 11 is hemispherical, and the top of the base plate 805 has multiple hemispherical grooves 806 that are adapted to the bottom of the elastic column 11. Multiple magnetic strips 25 are embedded inside the base plate 805 and are arranged parallel to each other. The hemispherical grooves 806 are located directly above the magnetic strips 25, and the bottom of the elastic column 11 is magnetically attracted to the magnetic strips 25. An iron ball or magnetic ball is embedded in the bottom of the elastic column 11, so that when the bottom of the elastic column 11 is inserted into the hemispherical groove 806, the bottom of the elastic column 11 is magnetically attracted to the magnetic strips 25. Through the hemispherical design of the magnetic strips 25, the hemispherical grooves 806, and the bottom of the elastic column 11, the magnetic attraction of the magnetic strips 25 to the bottom of the elastic column 11 and the resistance of the bottom of the elastic column 11 being inserted into the hemispherical grooves 806 make it difficult for the thrust of the water flow to deform the elastic column 11 during the filtration process, so as to ensure the filtration effect.

[0033] In this embodiment, preferably, a hydraulic cylinder 10 is fixedly installed on the top wall of the housing 8, the output end of the hydraulic cylinder 10 penetrates through the top wall of the housing 8, and the output end of the hydraulic cylinder 10 is fixedly connected to the lifting plate 9; the extension and retraction of the output end of the hydraulic cylinder 10 can drive the lifting plate 9 to rise and fall, so as to switch the filter device 7 between the filtration state and the cleaning state.

[0034] Please see Figures 5-9 In this embodiment of the invention, the lifting plate 9 has a flow-diverting cavity 901 inside, the elastic column 11 is hollow, the flow-diverting cavity 901 is connected to the inner cavity of the elastic column 11, a cylinder 13 is fixedly installed on the top wall of the lifting plate 9, a piston 14 is slidably installed inside the cylinder 13, the cylinder 13 is connected to the flow-diverting cavity 901, and the cylinder 13, the flow-diverting cavity 901, and the elastic column 11 are all filled with oil. A transmission assembly for driving the piston 14 to rise and fall is provided on the cylinder 13; the transmission assembly includes a screw 16, a nut 15, and a transmission rod 17, the nut 15 is fixedly connected to the top wall of the cylinder 13, the screw 16 passes through the nut 15 and is threadedly connected to the nut 15, the bottom end of the screw 16 is rotatably connected to the piston 14, a support frame 19 is fixedly installed on the top wall of the cylinder 13, and a transmission rod 17 is rotatably installed on the support frame 19, the bottom end of the transmission rod 17 extends into the screw 16. Inside, the transmission rod 17 and the screw 16 slide vertically together. A limiting strip 18 is fixedly installed on the outer peripheral wall of the transmission rod 17. The limiting strip 18 slides vertically together with the screw 16. The setting of the limiting strip 18 allows the transmission rod 17 to move vertically relative to the screw 16, but not to rotate relative to the screw 16. This allows the transmission rod 17 to drive the screw 16 to rotate. The support frame 19 is provided with a drive assembly for driving the transmission rod 17 to rotate. The drive assembly includes a rotating shaft 21, a spur gear 23, a bevel gear 1 20, and a bevel gear 22. The rotating shaft 21 is rotatably installed on the top of the support frame 19. The rotating shaft 21 is horizontally set. The two ends of the rotating shaft 21 are respectively fixedly fitted with the spur gear 23 and the bevel gear 22. The top end of the transmission rod 17 is fixedly fitted with the bevel gear 1 20. The bevel gear 1 20 meshes with the bevel gear 22. The inner wall of the top wall of the housing 8 is fixedly installed with a rack 24 that matches the spur gear 23.

[0035] When the filter device 7 is filtering, the piston 14 is located at the bottom of the inner cavity of the cylinder 13. At this time, the oil fills the inner cavity of the elastic column 11, and the elastic column 11 is in its thickest state, thus ensuring that the distance between the elastic column 11 and the separator rod 12 is small enough to meet the filtration conditions. When it is necessary to clean the elastic column 11 and the elastic filter hairs 1101, the output end of the hydraulic cylinder 10 is controlled to retract. When the output end of the hydraulic cylinder 10 retracts, it drives the lifting plate 9 to move upward, thereby driving the cylinder 13 and the support frame 19 to move upward synchronously. When the spur gear 23 moves upward to contact the rack 24, as the lifting plate 9 continues to move upward, the spur gear 23 rotates. When the spur gear 23 rotates, it drives the bevel gear 22 to rotate through the rotating shaft 21. When the bevel gear 22 rotates, it drives the bevel gear 20 to rotate. When rotating, the transmission rod 17 rotates, which in turn drives the screw 16 to rotate via the limit bar 18. The setting of the nut 15 causes the piston 14 to move upward when the screw 16 rotates, thereby drawing the oil in the diversion chamber 901 into the cylinder 13. This causes the elastic column 11 to contract. After the elastic column 11 contracts, the distance between two adjacent elastic columns 11 decreases, making it easier to flush out impurities stuck between the two elastic columns 11. When the lifting plate 9 descends, the spur gear 23 rotates in the opposite direction, which in turn drives the transmission rod 17 to rotate in the opposite direction via the bevel gear 22 and bevel gear 20. This causes the piston 14 to move downward and reset within the cylinder 13 via the screw 16, causing the elastic column 11 to expand again, thereby reducing the gap between two adjacent elastic columns 11 and meeting the requirements of the subsequent filtration process.

[0036] In this embodiment, preferably, a plurality of reinforcing ribs 1102 are embedded inside the elastic column 11. The plurality of reinforcing ribs 1102 are arranged in a ring array with the axis of the elastic column 11 as the array center. The reinforcing ribs 1102 are rigid structures, which can provide auxiliary support for the elastic column 11, making the elastic column 11 less prone to bending and preventing it from bending when it contracts. The reinforcing ribs 1102 can be made of 316L stainless steel wire or glass fiber reinforced polypropylene strips.

[0037] Working principle: During the water circulation process of aquaculture vessels, seawater enters the inlet gaps between multiple parallel filter units through multiple sets of through channels 801. Seawater filtration is achieved using a filtration structure formed by the interlacing of elastic columns 11, elastic filter bristles 1101, and separator rods 12. After filtration, the water is input from the inlet 102 of aquaculture tank 1 via water pump 2, water supply pipe 6, three-way valve 3 (state one: interface 303 is connected to interface 301), and water supply pipe 4. Simultaneously, water in aquaculture tank 1 is discharged from the outlet 101, completing the water circulation. When the filter device 7 is not in use, ocean currents can flush impurities on the filter units through through channels 801. When backwashing is required, the hydraulic cylinder 10 is driven to move the lifting plate 9 upwards, causing the separator rods 12 to move from the elastic columns 1101 to the lifting plate 9. The column 11 is moved out, and the three-way valve 3 is switched to state two (interface two 302 and interface three 303 are connected). The water pump 2 sends seawater into the bottom of the inner cavity of the shell 8 through the through channel one 801, and then back to the top of the inner cavity of the shell 8 through the water supply pipe three 6, water supply pipe two 5, and connecting pipe two 803. Finally, it is discharged through the through channel two 804. The water flows over the elastic column 11 and the elastic filter 1101 to backwash the elastic column 11 and the elastic filter 1101. At the same time, during the upward movement of the lifting plate 9, the spur gear 23 and the rack 24 mesh, and drive the screw 16 to rotate through the transmission component, so that the piston 14 moves upward to draw the oil in the diversion chamber 901 and the elastic column 11, so that the elastic column 11 contracts, which facilitates the removal of impurities and improves the backwashing effect.

[0038] During filtration, the bottom of the elastic column 11 is embedded in the hemispherical groove 806 of the base plate 805 and is magnetically attracted to the magnetic strip 25 inside the base plate 805. Combined with the characteristics of the elastic column 11 itself, it can resist the thrust of water flow and avoid deformation, ensuring the stability of the filtration gap to meet the filtration requirements. At the same time, the piston 14 inside the cylinder 13 is located at the bottom, and the oil fills the inner cavity of the elastic column 11, making it in its coarsest state, further ensuring that the filtration gap meets the requirements. After backwashing, when the lifting plate 9 descends, the spur gear 23 rotates in the opposite direction, driving the piston 14 to move down through the transmission component, pushing the oil back into the inner cavity of the elastic column 11 so that it re-expands and restores the filtration state, so that seawater filtration can continue in the future.

[0039] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A water circulation system for aquaculture water on an aquaculture vessel, comprising an aquaculture tank (1), a water conveying mechanism, and a filtration device (7), wherein a drain outlet (101) is connected to the top of one side of the aquaculture tank (1), and a water inlet (102) is connected to the bottom of the other side of the aquaculture tank (1), the outlet of the water conveying mechanism is connected to the water inlet (102), and the filtration device (7) is disposed at the water inlet of the water conveying mechanism, characterized in that: The filtration device (7) includes a housing (8), a lifting plate (9) disposed inside the housing (8), and multiple parallel filtration units. A water inlet gap is provided between the multiple filtration units. Multiple sets of through grooves (801) are symmetrically opened on the two opposite side walls of the housing (8). The multiple sets of through grooves (801) are respectively connected to multiple filtration gaps. A bottom plate (805) is provided at the bottom of the housing (8). The filtration unit includes multiple elastic columns (11) fixedly installed on the bottom wall of the lifting plate (9) and multiple partition rods (12) fixedly installed on the top wall of the bottom plate (805). Multiple elastic filter hairs (1101) are fixedly installed on the outer wall of the elastic columns (11). The elastic columns (11), elastic filter hairs (1101) and partition rods (12) in the same filtration unit are distributed in the same vertical plane. The elastic columns (11) and partition rods (12) are arranged alternately. The lifting plate (9) has a flow-dividing cavity (901) inside. The elastic column (11) is hollow. The flow-dividing cavity (901) is connected to the inner cavity of the elastic column (11). A cylinder (13) is fixedly installed on the top wall of the lifting plate (9). A piston (14) is slidably installed inside the cylinder (13). The cylinder (13) is connected to the flow-dividing cavity (901). The cylinder (13), the flow-dividing cavity (901) and the elastic column (11) are all filled with oil. A transmission assembly for driving the piston (14) to rise and fall is provided on the cylinder (13).

2. The water circulation system for aquaculture water on an aquaculture vessel according to claim 1, characterized in that: One side of the housing (8) is connected to a connecting pipe 1 (802) and a connecting pipe 2 (803). The connecting pipe 2 (803) is located above the connecting pipe 1 (802). Multiple sets of through grooves 2 (804) are symmetrically opened on both opposite side walls of the housing (8). The multiple sets of through grooves 2 (804) are located directly above the multiple sets of through grooves 1 (801).

3. The water circulation system for aquaculture water on an aquaculture vessel according to claim 2, characterized in that: The water supply mechanism includes a water pump (2), a three-way valve (3), a first water supply pipe (4), a second water supply pipe (5), and a third water supply pipe (6). The three-way valve (3) is provided with an interface (301), an interface (302), and an interface (303). One end of the first water supply pipe (4) is connected to the water inlet (102) on the breeding tank (1), and the other end of the first water supply pipe (4) is connected to the interface (301). One end of the second water supply pipe (5) is connected to the interface (302), and the other end of the second water supply pipe (5) is connected to the connecting pipe (803). One end of the third water supply pipe (6) is connected to the water inlet of the water pump (2), and the other end of the third water supply pipe (6) is connected to the connecting pipe (802). The water outlet of the water pump (2) is connected to the interface (303).

4. The water circulation system for aquaculture water on an aquaculture vessel according to claim 1, characterized in that: The bottom of the elastic column (11) is hemispherical, and the top of the base plate (805) is provided with a plurality of hemispherical grooves (806) that are adapted to the bottom of the elastic column (11).

5. A water circulation system for aquaculture water on an aquaculture vessel according to claim 4, characterized in that: Multiple magnetic strips (25) are embedded inside the base plate (805). The multiple magnetic strips (25) are arranged parallel to each other. The hemispherical groove (806) is located directly above the magnetic strips (25). The bottom of the elastic column (11) is magnetically attracted to the magnetic strips (25).

6. The water circulation system for aquaculture water on an aquaculture vessel according to claim 1, characterized in that: The transmission assembly includes a screw (16), a nut (15), and a transmission rod (17). The nut (15) is fixedly connected to the top wall of the cylinder (13). The screw (16) passes through the nut (15) and is threadedly connected to the nut (15). The bottom end of the screw (16) is rotatably connected to the piston (14). A support frame (19) is fixedly installed on the top wall of the cylinder (13). The transmission rod (17) is rotatably installed on the support frame (19). The bottom end of the transmission rod (17) extends into the screw (16), and the transmission rod (17) and the screw (16) slide vertically together. A limit strip (18) is fixedly installed on the outer peripheral wall of the transmission rod (17). The limit strip (18) and the screw (16) slide vertically together. A drive assembly for driving the transmission rod (17) to rotate is provided on the support frame (19).

7. A water circulation system for aquaculture water on an aquaculture vessel according to claim 6, characterized in that: The drive assembly includes a rotating shaft (21), a spur gear (23), a bevel gear one (20), and a bevel gear two (22). The rotating shaft (21) is rotatably mounted on the top of the support frame (19). The rotating shaft (21) is horizontally positioned. The two ends of the rotating shaft (21) are respectively fixedly fitted with a spur gear (23) and a bevel gear two (22). The top end of the transmission rod (17) is fixedly fitted with a bevel gear one (20). The bevel gear one (20) meshes with the bevel gear two (22). The inner wall of the top wall of the housing (8) is fixedly fitted with a rack (24) that is compatible with the spur gear (23).

8. The water circulation system for aquaculture water on an aquaculture vessel according to claim 1, characterized in that: The elastic column (11) is internally embedded with multiple reinforcing ribs (1102), which are arranged in a ring array with the axis of the elastic column (11) as the array center.

9. A water circulation system for aquaculture water on an aquaculture vessel according to claim 1, characterized in that: A hydraulic cylinder (10) is fixedly installed on the top wall of the housing (8). The output end of the hydraulic cylinder (10) passes through the top wall of the housing (8), and the output end of the hydraulic cylinder (10) is fixedly connected to the lifting plate (9).

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