Water circulation system of cultivation water for cultivation work ship

Abstract

The invention relates to the technical field of fish culture, and discloses a water circulation system of culture water for a culture work ship, the water circulation system comprises a culture cabin, a water delivery mechanism and a filtering device, the top of one side of the culture cabin is communicated with a water outlet, the bottom of the other side of the culture cabin is communicated with a water inlet, and the water outlet end of the water delivery mechanism is communicated with the water inlet; according to the invention, multiple groups of parallel filtering units are formed by staggering the elastic stand columns, the elastic filtering hairs and the separation rods, and are matched with multiple groups of through grooves I symmetrically formed in the side wall of the shell, so that on one hand, efficient pretreatment filtering of seawater is realized, and impurities such as plankton, silt and organic debris in a marine water body can be effectively removed; the water is prevented from entering a culture cabin to pollute water quality or influence the health of cultured organisms, and the cleaning requirement of culture water is met; on the other hand, when the filtering device is not used, ocean current can penetrate through the first through grooves to wash impurities attached to the elastic stand columns, the elastic filtering bristles and the separation rods, and attachment and accumulation of the impurities on the filtering 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 all year round and reduce 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. 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 the farming operation due to system downtime, and the convenience of use is poor.

[0004] 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

[0005] 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.

[0006] 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.

[0007] Further, the shell is symmetrically provided with a plurality of groups of through grooves two on the two opposite side walls, and the plurality of groups of through grooves two are located directly above the plurality of groups of through grooves one.

[0008] 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.

[0009] 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.

[0010] Further, a plurality of magnetic strips are embedded in the bottom plate, the magnetic strips are arranged in parallel with each other, the hemispherical grooves are located directly above the magnetic strips, and the bottom of the elastic column is magnetically attracted to the magnetic strips.

[0011] The further arrangement of the present application is that the inside of the lifting plate is provided with a shunt cavity, the elastic column is hollow, the shunt cavity is communicated with the inner cavity of the elastic column, the top wall of the lifting plate is fixedly provided with a cylinder, the inside of the cylinder is slidably provided with a piston, the cylinder is communicated with the shunt cavity, the cylinder, the shunt cavity and the inner cavity of the elastic column are filled with oil, and the cylinder is provided with a transmission assembly for driving the piston to lift.

[0012] The further arrangement of the present application is that the transmission assembly comprises a screw rod, a nut and a transmission rod, the nut is fixedly connected with the top wall of the cylinder, the screw rod penetrates through the nut and is threadedly connected with the nut, the bottom end of the screw rod is rotatably connected with the piston, the top wall of the cylinder is fixedly provided with a support frame, the transmission rod is rotatably provided on the support frame, the bottom end of the transmission rod extends into the screw rod and is slidably connected with the screw rod, the outer circumferential wall of the transmission rod is fixedly provided with a limiting strip, the limiting strip is slidably connected with the screw rod, and the support frame is provided with a driving assembly for driving the transmission rod to rotate.

[0013] The further arrangement of the present application is that the driving assembly comprises a rotating shaft, a straight gear, a bevel gear one and a bevel gear two, the rotating shaft is rotatably provided on the top of the support frame, the rotating shaft is horizontally arranged, the straight gear and the bevel gear two are respectively fixedly sleeved on the two ends of the rotating shaft, the top end of the transmission rod is fixedly sleeved with the bevel gear one, the bevel gear one is engaged with the bevel gear two, and the inner wall of the top wall of the shell body is fixedly provided with a rack matched with the straight gear.

[0014] The further arrangement of the present application is that a plurality of reinforcing ribs are embeddedly arranged in the inside of the elastic column, and the plurality of reinforcing ribs are annularly arranged with the axis of the elastic column as the array center.

[0015] The further arrangement of the present application is that the top wall of the shell body is fixedly provided with a hydraulic cylinder, the output end of the hydraulic cylinder penetrates through the top wall of the shell body and is fixedly connected with the lifting plate.

[0016] In summary, the present application has the following advantages: the present application comprises a plurality of parallel filtering units formed by the elastic column, the elastic filter hairs and the staggered partition rods, and is matched with a plurality of symmetrical through grooves one provided on the side wall of the shell body, which can realize efficient pretreatment and filtration of seawater, effectively remove impurities such as plankton, silt and organic debris in the ocean water, avoid the impurities from entering the breeding cabin to pollute the water quality or affect the health of the breeding organisms, and meet the cleaning demand of the breeding water; on the other hand, when the filtering device is not used, the ocean current can flush the impurities adhered to the elastic column, the elastic filter hairs and the partition rods through the through grooves one, greatly reduce the adhesion and accumulation of impurities on the filtering structure, effectively solve the problem that the filter screen pores are easily blocked in the traditional filter screen filtration scheme, the water inflow is reduced, and the filtration efficiency is attenuated, and the stability of the overall operation of the water circulation system is ensured. 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

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the filtration device of the present invention; Figure 3 This is a cross-sectional view of the filtration device of the present invention; Figure 4 This is a schematic diagram of the lifting plate and elastic column of the present invention; Figure 5 This is a cross-sectional view of the lifting plate and cylinder of the present invention; Figure 6 This is a cross-sectional structural schematic diagram of the cylinder, transmission assembly, and drive assembly of the present invention; Figure 7 This is a three-dimensional structural diagram of the independent cleaning mechanism of the present invention; Figure 8 This is a top view of the base plate and the partition bar of the present invention; Figure 9 This is a cross-sectional structural diagram of the elastic column of the present invention.

[0018] In the figure: 1, culture cabin; 101, water outlet; 102, water inlet; 2, water pump; 3, three-way valve; 301, interface one; 302, interface two; 303, interface three; 4, water delivery pipe one; 5, water delivery pipe two; 6, water delivery pipe three; 7, filter device; 8, shell; 801, through groove one; 802, connecting pipe one; 803, connecting pipe two; 804, through groove two; 805, bottom plate; 806, semispherical recess; 9, lifting plate; 901, shunt cavity; 10, hydraulic cylinder; 11, elastic stand; 1101, elastic filter hair; 1102, reinforcing rib; 12, partition rod; 13, cylinder barrel; 14, piston; 15, nut; 16, screw rod; 17, transmission rod; 18, limiting strip; 19, support frame; 20, bevel gear one; 21, rotating shaft; 22, bevel gear two; 23, spur gear; 24, rack; 25, magnetic strip. DETAILED DESCRIPTION

[0019] The application will be further described below with reference to the accompanying drawings of the embodiments thereof.

[0020] Please refer to Figures 1-8The embodiment of the application discloses a water circulation system for aquaculture water of an aquaculture factory ship, which comprises an aquaculture cabin 1, a water conveying mechanism and a filter device 7, a water outlet 101 is symmetrically arranged on the top of one side of the aquaculture cabin 1, a water inlet 102 is symmetrically arranged on the bottom of the other side of the aquaculture cabin 1, the water outlet of the water conveying mechanism is connected with the water inlet 102, and the filter device 7 is arranged on the water inlet of the water conveying mechanism, wherein the filter device 7 comprises a shell 8, a lifting plate 9 arranged in the shell 8 and a plurality of parallel filter units, water inlets are arranged between the plurality of filter units, a plurality of groups of through grooves 801 are symmetrically arranged on the two opposite side walls of the shell 8, each group comprises a plurality of through grooves 801, the plurality of groups of through grooves 801 are connected with the plurality of filter units, respectively, a bottom plate 805 is arranged on the bottom of the shell 8, the filter unit comprises a plurality of elastic columns 11 fixedly installed on the bottom wall of the lifting plate 9 and a plurality of partition rods 12 fixedly installed on the top wall of the bottom plate 805, a plurality of elastic filter hairs 1101 are fixedly installed on the outer wall of the elastic column 11, the elastic column 11, the elastic filter hair 1101 and the partition rod 12 in the same filter unit are arranged in the same vertical plane, the elastic column 11 and the partition rod 12 are arranged alternately, and the elastic column 11 and the elastic filter hair 1101 can be made of chlorinated butyl rubber or ethylene-propylene-diene rubber; in specific use, seawater enters the shell 8 through the plurality of groups of through grooves 801, the seawater is filtered through the filter gaps formed between the elastic column 11, the elastic filter hair 1101 and the partition rod 12, and the filtered seawater is conveyed into the aquaculture cabin 1 through the water conveying mechanism, through the arrangement of the plurality of parallel filter units and the plurality of water inlets, the seawater enters the plurality of water inlets through the plurality of groups of through grooves 801, and then passes through at least one filter unit to enter the water conveying mechanism, so that the plurality of filter units can filter the seawater, the filtering pressure is reduced, and the plurality of groups of through grooves 801 are symmetrically arranged, so that when the ocean current passes through the through grooves 801 without using the filter device 7, the impurities attached to the elastic column 11, the elastic filter hair 1101 and the partition rod 12 can be washed down, thereby reducing the maintenance frequency of the filter device 7, when backwashing of the filter device 7 is needed, the lifting plate 9 is driven to move upwards, the plurality of elastic columns 11 are driven to move upwards when the lifting plate 9 moves upwards, the partition rod 12 is moved out of the elastic columns 11, and then a large gap is formed between the elastic columns 11, so that the impurities are more easily separated from the elastic columns 11 and the elastic filter hairs 1101, thereby improving the backwashing effect of the elastic columns 11.

[0021] Preferably, one side of the shell 8 is provided with a connecting pipe one 802 and a connecting pipe two 803, the connecting pipe two 803 is located above the connecting pipe one 802, a plurality of groups of through grooves two 804 are symmetrically formed on the two opposite side walls of the shell 8, the plurality of groups of through grooves two 804 are located directly above the plurality of groups of through grooves one 801, the water delivery mechanism comprises a water pump 2, a three-way valve 3, a water delivery pipe one 4, a water delivery pipe two 5 and a water delivery pipe three 6, the three-way valve 3 is provided with an interface one 301, an interface two 302 and an interface three 303, one end of the water delivery pipe one 4 is connected with the water inlet 102 on the breeding cabin 1, the other end of the water delivery pipe one 4 is connected with the interface one 301, one end of the water delivery pipe two 5 is connected with the interface two 302, the other end of the water delivery pipe two 5 is connected with the connecting pipe two 803, one end of the water delivery pipe three 6 is connected with the water inlet end of the water pump 2, the other end of the water delivery pipe three 6 is connected with the connecting pipe one 802, the water outlet end of the water pump 2 is connected with the interface three 303; the three-way valve 3 has two states, state one is that the interface three 303 is connected with the interface one 301, the interface two 302 is closed, when the water pump 2 is opened, seawater enters the water delivery pipe one 4 through the water delivery pipe three 6, and then is input into the breeding cabin 1 through the water inlet 102, so as to replenish and change water in the breeding cabin 1, state two is that the interface two 302 is connected with the interface three 303, the interface one 301 is closed, when the water pump 2 is opened, seawater is input into the water delivery pipe two 5 through the water delivery pipe three 6, and then is input into the shell 8 through the connecting pipe two 803, so as to backwash the elastic column 11 and the elastic filter hair 1101.

[0022] Preferably, the bottom of the elastic column 11 is semispherical, a plurality of semispherical grooves 806 matched with the bottom of the elastic column 11 are formed on the top of the bottom plate 805, a plurality of magnetic strips 25 are embedded and arranged in the bottom plate 805, the plurality of magnetic strips 25 are arranged in parallel, the semispherical 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; the bottom of the elastic column 11 is embedded with an iron ball or a magnetic ball, so that when the bottom of the elastic column 11 is inserted into the semispherical groove 806, the bottom of the elastic column 11 is magnetically attracted to the magnetic strip 25, through the semispherical design of the magnetic strip 25, the semispherical groove 806 and the bottom of the elastic column 11, the magnetic attraction of the magnetic strip 25 to the bottom of the elastic column 11 and the resistance effect of the bottom of the elastic column 11 inserted into the semispherical groove 806, it is difficult for the thrust of the water flow to deform the elastic column 11 during the filtering process, so as to ensure the filtering effect.

[0023] In this embodiment, preferably, the top wall of the shell 8 is fixedly provided with a hydraulic cylinder 10, the output end of the hydraulic cylinder 10 penetrates the top wall of the shell 8, and the output end of the hydraulic cylinder 10 is fixedly connected with the lifting plate 9; the lifting plate 9 can be lifted and lowered by the extension and retraction of the output end of the hydraulic cylinder 10, so as to switch the filter device 7 between the filtering state and the cleaning state.

[0024] Please refer to Figures 5-9 In the embodiment of the present application, a shunt cavity 901 is formed in the inside of the lifting plate 9, the elastic column 11 is hollow, the shunt cavity 901 is in communication with the inner cavity of the elastic column 11, a cylinder barrel 13 is fixedly provided on the top wall of the lifting plate 9, a piston 14 is slidingly installed in the inside of the cylinder barrel 13, the cylinder barrel 13 is in communication with the shunt cavity 901, and the cylinder barrel 13, the shunt cavity 901 and the elastic column 11 are all filled with oil, a transmission assembly for driving the piston 14 to lift and lower is arranged on the cylinder barrel 13; the transmission assembly comprises a screw rod 16, a nut 15 and a transmission rod 17, the nut 15 is fixedly connected with the top wall of the cylinder barrel 13, the screw rod 16 penetrates the nut 15 and is threadedly connected with the nut 15, the bottom end of the screw rod 16 is rotatably connected with the piston 14, a support frame 19 is fixedly provided on the top wall of the cylinder barrel 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 rod 16 and is in up-and-down sliding fit with the screw rod 16, a limiting strip 18 is fixedly provided on the outer circumferential wall of the transmission rod 17 and is in up-and-down sliding fit with the screw rod 16, the limiting strip 18 is arranged so that the transmission rod 17 can only move up and down relative to the screw rod 16 and cannot rotate relative to the screw rod 16, so that the transmission rod 17 can drive the screw rod 16 to rotate, a driving assembly for driving the transmission rod 17 to rotate is arranged on the support frame 19; the driving assembly comprises 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 installed at the top of the support frame 19 and is horizontally arranged, the spur gear 23 and the bevel gear two 22 are fixedly sleeved on the two ends of the rotating shaft 21, respectively, the bevel gear one 20 is fixedly sleeved on the top end of the transmission rod 17, the bevel gear one 20 is in engagement with the bevel gear two 22, and a rack 24 matched with the spur gear 23 is fixedly installed on the inner wall of the top wall of the shell 8.

[0025] When the filtering device 7 is filtering, the piston 14 is located at the bottom of the inner cavity of the cylinder barrel 13, at this time, the oil fills the inner cavity of the elastic column 11, and the elastic column 11 is in the coarsest state, so as to ensure that the distance between the elastic column 11 and the partition rod 12 is small enough to meet the filtering condition. When the elastic column 11 and the elastic filter hair 1101 need to be cleaned, the output end of the hydraulic cylinder 10 is retracted, and the output end of the hydraulic cylinder 10 drives the lifting plate 9 to move upwards, thereby driving the cylinder barrel 13 and the support frame 19 to move upwards synchronously. When the spur gear 23 moves upwards to contact the rack 24, the spur gear 23 rotates as the lifting plate 9 continues to move upwards. The spur gear 23 rotates to drive the bevel gear two 22 to rotate through the rotating shaft 21. The bevel gear two 22 rotates to drive the bevel gear one 20 to rotate. The bevel gear one 20 rotates to drive the transmission rod 17 to rotate, thereby driving the screw rod 16 to rotate through the limiting strip 18. The setting of the nut 15 drives the piston 14 to move upwards as the screw rod 16 rotates, thereby pumping the oil in the shunt cavity 901 into the cylinder barrel 13, and further causing the elastic column 11 to contract. After the elastic column 11 contracts, the distance between adjacent two elastic columns 11 decreases, thereby making the impurities stuck between the two elastic columns 11 more easily washed down. When the lifting plate 9 descends, the spur gear 23 rotates in the opposite direction, thereby driving the transmission rod 17 to rotate in the opposite direction through the bevel gear two 22 and the bevel gear one 20, and thereby driving the piston 14 to move downwards in the cylinder barrel 13 to reset through the screw rod 16, so that the elastic column 11 expands again to reduce the gap between adjacent two elastic columns 11, thereby meeting the requirements of the subsequent filtering process.

[0026] In the embodiment, preferably, a plurality of reinforcing ribs 1102 are embedded in the inside of 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 rib 1102 is a rigid structure, which can assist in supporting the elastic column 11, so that the elastic column 11 is not easy to bend, and the elastic column 11 will not bend when it contracts. The reinforcing rib 1102 can be made of 316L stainless steel wire or glass fiber reinforced polypropylene strip.

[0027] Working principle: in the process of water circulation in the cultivation ship, seawater enters the water inlet gap between multiple parallel filter units through multiple groups of through grooves 801, and seawater filtration is realized by using the filter structure formed by the interlacing of the elastic columns 11, the elastic filter hairs 1101 and the partition rods 12. After filtration, the water is input from the water inlet 102 of the cultivation cabin 1 through the water pump 2, the water delivery pipe three 6, the three-way valve 3 (state one: interface three 303 and interface one 301 are connected), the water delivery pipe one 4, and at the same time, the water in the cultivation cabin 1 is discharged from the water outlet 101, completing the water circulation. When the filter device 7 is not used, the ocean current can flush the impurities on the filter unit through the through groove one 801. When backwashing is needed, the hydraulic cylinder 10 is first driven to drive the lifting plate 9 to move upwards, so that the partition rod 12 moves out from between the elastic columns 11, and then the three-way valve 3 is switched to state two (interface two 302 and interface three 303 are connected), and the water pump 2 enters seawater into the bottom of the inner cavity of the shell 8 through the through groove one 801, and then the seawater is input back to the top of the inner cavity of the shell 8 through the water delivery pipe three 6, the water delivery pipe two 5 and the connecting pipe two 803, and finally the seawater is discharged through the through groove two 804. The water flow passes through the elastic columns 11 and the elastic filter hairs 1101 to backwash the elastic columns 11 and the elastic filter hairs 1101. At the same time, during the upward movement of the lifting plate 9, the spur gear 23 meshes with the rack 24, the screw rod 16 is rotated by the transmission assembly, the piston 14 moves upwards to draw the oil in the shunt cavity 901 and the elastic column 11, the elastic column 11 shrinks, and the effect of backwashing is improved.

[0028] During filtration, the bottom of the elastic column 11 is embedded in the hemispherical groove 806 of the bottom plate 805, and is magnetically attracted to the magnetic strip 25 in the bottom plate 805. Combined with the characteristics of the elastic column 11 itself, the elastic column 11 can resist the water flow thrust to avoid deformation, ensure the stability of the filtration gap and meet the filtration requirements. At the same time, the piston 14 in the cylinder barrel 13 is located at the bottom, the oil fills the inner cavity of the elastic column 11 to make it in the coarsest state, and the filtration gap is further ensured to meet the requirements. When the lifting plate 9 descends after backwashing, the spur gear 23 rotates in the opposite direction, the piston 14 moves downwards by the transmission assembly, the oil is pushed back into the inner cavity of the elastic column 11 to make it re-expand, and the filtration state is restored, so that subsequent seawater filtration can continue.

[0029] The above is only the preferred embodiment of the present application, so any equivalent changes or modifications made according to the structure, features and principles described in the patent application range of the present application are included in the patent application range of the present 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.

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 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).

7. A water circulation system for aquaculture water on an aquaculture vessel according to claim 6, 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).

8. A water circulation system for aquaculture water on an aquaculture vessel according to claim 7, 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).

9. A water circulation system for aquaculture water on an aquaculture vessel according to claim 6, 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.

10. 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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