Closed fishery circulating breeding system

Abstract

The invention discloses a closed fishery circulating breeding system which comprises a breeding device, a water circulation pipeline, a biochemical device, an oxygen supply device and an air supply device, the breeding device comprises a breeding tank and a feeding assembly, the breeding tank forms a breeding cavity, the breeding tank is provided with a first water inlet pipe and a first water outlet pipe, and the feeding assembly is arranged on the breeding tank; the water circulation pipeline is arranged between the first water inlet pipe and the first water outlet pipe, the biochemical device comprises a biochemical tank body, a biochemical cavity is formed in the biochemical tank body and communicated with the water circulation pipeline, the biochemical cavity is used for containing nitrifying bacteria, the oxygen supply device is connected to the breeding tank body and the biochemical tank body, and an air delivery pipe is arranged between the air supply device and the breeding tank body. According to the closed fishery circulating breeding system, the pressure requirements of aquatic products growing under different environmental pressures can be met, the oxygen dissolving efficiency of water in the breeding cavity is higher, growth of the aquatic products is better facilitated, and in addition, the biochemical device is more beneficial to growth of photophobic and aerobic nitrifying bacteria.

Description

Technical Field

[0001] The present invention relates to the technical field of fishery breeding, and in particular to a closed fishery circulation breeding system. Background Art

[0002] The existing fishery breeding system mainly includes breeding ponds and biochemical ponds. The water discharged from the breeding pond is nitrified by nitrifying bacteria in the biochemical pond to reduce the ammonia nitrogen content, and then re-enters the breeding pond to achieve water recycling.

[0003] However, the depth of existing breeding ponds is generally 1 to 2 meters, which is only suitable for aquatic products that habitually live in shallow waters. It cannot meet the growth needs of aquatic products that habitually live in deep waters with greater environmental pressure. Moreover, aquatic products in breeding ponds are easily affected by the external environment. When oxygen is input into the breeding pond, most of the oxygen will be directly discharged from the top of the breeding pond, resulting in low efficiency of dissolved oxygen in the breeding pond, which is not conducive to the growth of aquatic products. In addition, the number of times dissolved oxygen needs to be supplemented is large, and the energy consumption is high. In addition, external light can easily irradiate the nitrifying bacteria in the biochemical pool. When oxygen is input into the biochemical pool, most of the oxygen will be directly discharged from the top of the biochemical pool, and the utilization rate of nitrifying bacteria is low, which is not conducive to the growth of photophobic aerobic nitrifying bacteria. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a closed fishery circulation culture system, which can not only adjust the environmental pressure in the culture chamber, thereby meeting the pressure requirements of aquatic products grown under different environmental pressures, but also reduce the impact of the external environment on aquatic products, and at the same time make the water dissolved oxygen efficiency in the culture chamber higher, more conducive to the growth of aquatic products, require fewer times of dissolved oxygen replenishment, and have lower energy consumption. In addition, the biochemical device is more conducive to the growth of photophobic aerobic nitrifying bacteria.

[0005] According to an embodiment of the present invention, a closed fishery circulation aquaculture system includes an aquaculture device, a water circulation pipeline, a biochemical device, an oxygen supply device and a gas supply device. The aquaculture device includes an aquaculture tank body and a feeding component. The aquaculture tank body forms an aquaculture cavity. The aquaculture tank body is provided with a first water inlet pipe and a first water outlet pipe. The feeding component is arranged in the aquaculture tank body for feeding into the aquaculture cavity. The water circulation pipeline is arranged between the first water inlet pipe and the first water outlet pipe. The biochemical device includes a biochemical tank body, the biochemical tank body forms a biochemical cavity, the biochemical cavity is connected to the water circulation pipeline, and the biochemical cavity is used to accommodate nitrifying bacteria. The oxygen supply device is connected to the aquaculture tank body and the biochemical tank body to supply oxygen to the aquaculture cavity and the biochemical cavity. A gas transmission pipe is provided between the gas supply device and the aquaculture tank body for transmitting gas into the aquaculture cavity to adjust the pressure in the aquaculture cavity.

[0006] The closed fishery circulation aquaculture system according to the embodiment of the present invention has at least the following beneficial effects:

[0007] In the present invention, since the aquaculture tank body is a closed structure, it can not only reduce the influence of the external environment on the aquatic products, but also prevent the oxygen from flowing directly into the atmosphere when supplying oxygen to the aquaculture chamber through the oxygen supply device, so that the oxygen and water have a better dissolution effect, the dissolved oxygen efficiency is higher, it is more conducive to the growth of aquatic products, the dissolved oxygen needs to be replenished less times, and the energy consumption is lower. Secondly, the gas supply device transmits gas to the aquaculture chamber through the gas pipe, which can adjust the air pressure at the top of the aquaculture chamber, and the water pressure of the water in the aquaculture chamber is affected by the air pressure environment, and then the water pressure of the water in the aquaculture chamber can be indirectly adjusted, so that the water pressure environment of different depths can be simulated, and the pressure requirements of aquatic products grown under different environmental pressures can be met. In addition, since the biochemical tank body is a closed structure, it is difficult for external light to enter the biochemical chamber, which is just suitable for the photophobic habits of nitrifying bacteria, and the oxygen discharged by the oxygen supply device will remain in the biochemical chamber and cannot be discharged at will, which is conducive to the full utilization of aerobic nitrifying bacteria, and is more conducive to the growth of photophobic aerobic nitrifying bacteria, thereby reducing the ammonia nitrogen content in the water. The effect is better.

[0008] According to some embodiments of the present invention, the feeding assembly includes a feeding cylinder and a pressure regulating mechanism, the feeding cylinder is arranged at the top of the breeding tank and is connected to the breeding cavity, a first valve is provided at the top of the feeding cylinder, and a second valve is provided at the bottom of the feeding cylinder, the feeding cylinder forms a storage cavity between the first valve and the second valve, and the pressure regulating mechanism is arranged on the feeding cylinder to adjust the air pressure in the storage cavity.

[0009] According to some embodiments of the present invention, the pressure regulating mechanism includes a first regulating tube and a second regulating tube, one end of the first regulating tube is connected to the feeding cylinder and connected to the storage cavity, and the other end is used to connect to the atmosphere, the first regulating tube is provided with a third valve, one end of the second regulating tube is connected to the feeding cylinder and connected to the storage cavity, and the other end is connected to the breeding tank and connected to the breeding cavity, and the second regulating tube is provided with a fourth valve.

[0010] According to some embodiments of the present invention, the first water outlet pipe is arranged in the middle of the bottom end of the breeding tank body, and two first water inlet pipes are arranged, and the two first water inlet pipes are respectively connected to the two ends of the length direction of the breeding tank body, and along the projection of the length direction of the breeding tank body, the connection positions of the two first water inlet pipes and the breeding tank body are respectively located on the opposite sides of the breeding tank body, and when the two first water inlet pipes supply water at the same time, the water in the breeding cavity forms a vortex under the impetus of the water discharged from the two first water inlet pipes.

[0011] According to some embodiments of the present invention, the two ends of the breeding tank body in the length direction are respectively connected to the first water supply pipe, and the first water inlet pipe and the first water supply pipe at the same end of the breeding tank body are respectively located on opposite sides of the breeding tank body. When the two first water supply pipes supply water at the same time, the water in the breeding cavity forms a vortex under the impetus of the water discharged from the two first water supply pipes.

[0012] According to some embodiments of the present invention, the breeding device also includes a first liquid level gauge assembly, which includes a liquid level gauge body, a first connecting pipe and a second connecting pipe, the first connecting pipe is connected to the top of the liquid level gauge body, one end of the first connecting pipe is connected to the breeding tank body and connected to the breeding cavity, the gas pipe is connected to the first connecting pipe, the second connecting pipe is connected to the bottom end of the liquid level gauge body, and the second connecting pipe is connected to the breeding tank body and connected to the breeding cavity.

[0013] According to some embodiments of the present invention, the biochemical tank body is provided with a second water inlet pipe and a second water outlet pipe connected to the water circulation pipeline, and the biochemical device further includes a plurality of attachment structures, which are movably accommodated in the biochemical chamber, and the attachment structures are provided for nitrifying bacteria to attach; wherein, the second water inlet pipe is connected to the bottom end of the biochemical tank body, and the water outlet direction of the second water inlet pipe is upward, so that the water discharged from the second water inlet pipe can push at least part of the attachment structure to move upward; or, the second water inlet pipe is provided with two and is respectively connected to the two ends of the biochemical tank body in the length direction, and along the projection of the length direction of the biochemical tank body, the connection positions of the two second water inlet pipes and the biochemical tank body are respectively located on opposite sides of the biochemical tank body, and when the two second water inlet pipes supply water at the same time, the water in the biochemical tank body forms a vortex under the impetus of the water discharged from the two second water inlet pipes, so as to drive at least part of the attachment structure to move.

[0014] According to some embodiments of the present invention, a filtering device is also included, which includes a shell, a filter cartridge and a water outlet assembly, a water inlet chamber and a clean water chamber are formed inside the shell, the water inlet chamber is provided with a water inlet, the clean water chamber is provided with a water outlet, the water inlet and the water outlet are connected to the water circulation pipeline, the filter cartridge is arranged in the clean water chamber, one end of the filter cartridge is opened and connected to the water inlet chamber, the water outlet assembly includes a movable part, a sliding part, a sewage pipe and an elastic member, the movable part is movably arranged in the shell, the sliding part is slidably connected to the movable part, the sewage pipe is connected to the sliding part, and the elastic member is arranged between the movable part and the sliding part; wherein the movable part can be moved to connect or separate the sewage pipe with the filter cartridge, and when the sewage pipe is connected to the filter cartridge, the elastic force of the elastic member makes the sliding part have a sliding tendency to drive the sewage pipe to approach the filter cartridge.

[0015] According to some embodiments of the present invention, the movable part is rotatably arranged on the shell, the rotation axis of the movable part is parallel to the length direction of the filter cartridge, the filter cartridge includes at least two groups, each group of the filter cartridge includes a plurality of filter cartridges arranged circumferentially along the rotation axis, the distances between the filter cartridges in different groups and the rotation axis are different, the sewage pipe is provided with a water inlet end corresponding to each group of the filter cartridges, and the movable part can be rotated so that the water inlet end is connected with a corresponding group of a plurality of the filter cartridges in sequence.

[0016] According to some embodiments of the present invention, the oxygen supply device is configured as an oxygen generator, and the closed fishery circulation breeding system further includes a heat exchange pipeline for conveying a heat exchange medium, the heat exchange pipeline having a first section and a second section, the first section being connected to the oxygen generator, and the second section being connected to the biochemical tank body and / or the water circulation pipeline; wherein the heat exchange medium can absorb the heat generated by the operation of the oxygen generator when passing through the first section, and can exchange heat with the water in the biochemical tank body and / or the water circulation pipeline when passing through the second section.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 It is an overall schematic diagram of the closed fishery circulation aquaculture system of the present invention;

[0020] Figure 2 This is a schematic diagram of one structure of a breeding device;

[0021] Figure 3 This is a schematic diagram of the installation of the feeding component;

[0022] Figure 4 It is a schematic diagram of the installation of the first liquid level meter assembly;

[0023] Figure 5 for Figure 2 The enlarged view of point A in the middle;

[0024] Figure 6 for Figure 2 The enlarged view of point B in the middle;

[0025] Figure 7 This is a schematic diagram of the installation of the sewage discharge assembly;

[0026] Figure 8 It is a schematic diagram of the water in the culture chamber forming a vortex;

[0027] Fig. 9 This is a schematic diagram of oxygen supply in the culture chamber;

[0028] Fig.10 This is a schematic diagram of the structure of the breeding tank;

[0029] Fig.11 This is a schematic diagram of one of the structures of the biochemical device;

[0030] Fig.12 This is a schematic diagram of the second water inlet pipe being connected to the bottom of the biochemical tank;

[0031] Fig.13 It is a schematic diagram when the second water inlet pipe is connected to both ends of the biochemical tank in the length direction;

[0032] Fig.14 A schematic diagram of one structure of a filtering device;

[0033] Fig.15 for Fig.14 A cross-sectional view of

[0034] Fig.16 It is a working schematic diagram of filtering water;

[0035] Fig.17 This is a working diagram for cleaning the filter cartridge;

[0036] Fig.18 This is a schematic diagram of the installation of the filter cartridge;

[0037] Fig.19 This is a schematic diagram of the installation of the elastic ring;

[0038] Fig. 20 for Fig.15 Enlarged view of point C in the middle.

[0039] Figure Number:

[0040] Aquaculture device 100; aquaculture tank 101; a feeding assembly 102; aquaculture chamber 103; a first water inlet pipe 104; a first water outlet pipe 105; a feeding tube 106; a first valve 107; a second valve 108; a storage chamber 109; a first regulating pipe 110; a third valve 111; a second regulating pipe 112; a fourth valve 113; a first water supply pipe 114; a first liquid level gauge assembly 115; a liquid level gauge body 116; a first connecting pipe 117; a second connecting pipe 118; a sampling tube 119; a fifth valve 120; a pressure sensor 121; a seventh valve 122; a pressure gauge 123; a seedling port 124; a first observation window 125; a sewage discharge assembly 126; a sewage collecting tube 127; a filter tube 128; a first filter screen 129; a first filter hole 130; a second filter hole 131; an end cover 132; an interception plate 133; a fish outlet pipe 134;

[0041] Water circulation pipeline 200; first pump 201;

[0042] Biochemical device 300; biochemical tank 301; biochemical chamber 302; second water inlet pipe 303; second water outlet pipe 304; attachment structure 305; water outlet section 306; second water supply pipe 307; water collecting cylinder 308; second filter screen 309; second liquid level gauge assembly 310; eighth valve 311; feeding port 312; second observation window 313;

[0043] Oxygen supply device 400; oxygen supply pipe 401; aeration plate 402; aeration pipe 403;

[0044] Gas supply device 500; gas delivery pipe 501; sixth valve 502;

[0045] Filter device 600; shell 601; water inlet chamber 602; water purification chamber 603; water inlet 604; water outlet 605; filter cartridge 606; water outlet assembly 607; movable part 608; sliding part 609; sewage pipe 610; elastic member 611; water inlet end 612; partition plate 613; connecting port 614; elastic ring 615; driving motor 616; first connecting part 617; sliding sleeve 618; connecting sleeve 619; second connecting part 620; drain pipe 621; ninth valve 622; water outlet end 623.

[0046] Heat exchange pipeline 700; first section 701; second section 702; transport section 703; third section 704;

[0047] Refrigeration device 800;

[0048] Disinfection device 900. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0052] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0053] Reference below Figures 1 to 20 A closed fishery circulation aquaculture system according to an embodiment of the present invention is described.

[0054] like Figures 1 to 20 As shown, the closed fishery circulation aquaculture system according to an embodiment of the present invention includes an aquaculture device 100, a water circulation pipeline 200, a biochemical device 300, an oxygen supply device 400 and a gas supply device 500.

[0055] The breeding device 100 includes a breeding tank 101 and a feeding assembly 102. The breeding tank 101 is a closed structure. The breeding tank 101 is formed with a breeding chamber 103. The breeding chamber 103 is used to breed aquatic products. The aquatic products can be fish or other suitable species, such as shrimps. The breeding device 100 can be provided with one or more, for example, three. The breeding tank 101 is provided with a first water inlet pipe 104 and a first water outlet pipe 105. The first water inlet pipe 104 can be one or more. The first water inlet pipe 104 is connected to the breeding chamber 103 for inputting water into the breeding chamber 103. The first water outlet pipe 105 can be one or more. The first water outlet pipe 105 is connected to the breeding chamber 103 for discharging water in the breeding chamber 103. The feeding assembly 102 is provided in the breeding tank 101 for feeding the feed required for aquatic products into the breeding chamber 103.

[0056] The water circulation pipeline 200 is arranged between the first water inlet pipe 104 and the first water outlet pipe 105. For example, when there are multiple aquaculture devices 100, the water circulation pipeline 200 may be provided with multiple water inlet connection ends and multiple water outlet connection ends. The multiple water inlet connection ends are respectively connected to the first water outlet pipes 105 of the multiple aquaculture devices 100, and the multiple water outlet connection ends are respectively connected to the first water inlet pipes 104 of the multiple aquaculture devices 100. The water circulation pipeline 200 may be provided with a first pump 201 for pumping water. The water discharged from the first water outlet pipe 105 enters the water circulation pipeline 200, and after being purified by the water purification structure such as the biochemical device 300 on the water circulation pipeline 200, it re-enters the aquaculture chamber 103 through the first water inlet pipe 104 to realize the recycling of water.

[0057] The biochemical device 300 includes a biochemical tank body 301, which is a closed structure. The biochemical tank body 301 is formed with a biochemical cavity 302, which is used to accommodate nitrifying bacteria. The biochemical cavity 302 is connected to the water circulation pipeline 200. Specifically, the biochemical tank body 301 can be provided with a second water inlet pipe 303 and a second water outlet pipe 304. The second water inlet pipe 303 can be one or more. The second water inlet pipe 303 connects the biochemical cavity 302 and the water circulation pipeline 200 to allow the water circulation pipeline 200 to input the treated water into the biochemical cavity 302. The second water outlet pipe 304 can be one or more. The second water outlet pipe 304 connects the biochemical cavity 302 and the water circulation pipeline 200 to allow the water in the biochemical cavity 302 that has been treated by nitrifying bacteria to be discharged back into the water circulation pipeline 200.

[0058] The oxygen supply device 400 is connected to the culture tank 101 and the biochemical tank 301 to supply oxygen to the culture chamber 103 and the biochemical chamber 302. For example, the oxygen supply device 400 can be connected to an oxygen supply pipe 401, and the oxygen supply pipe 401 has at least two oxygen outlet ends, and the two oxygen outlet ends are respectively connected to the culture tank 101 and the biochemical tank 301. The oxygen supply device 400 supplies oxygen to the culture chamber 103 and the biochemical chamber 302 through the oxygen supply pipe 401.

[0059] A gas pipe 501 is provided between the gas supply device 500 and the breeding tank 101 for delivering gas to the breeding chamber 103 to adjust the pressure in the breeding chamber 103. The gas supply device 500 can be a gas generator such as an air compressor. The gas provided by the gas supply device 500 can be air, nitrogen and other gases that are difficult to dissolve in water.

[0060] In the present invention, since the breeding tank 101 is a closed structure, it can not only reduce the impact of the external environment on the aquatic products, but also prevent the oxygen from flowing directly into the atmosphere when supplying oxygen to the breeding chamber 103 through the oxygen supply device 400, so that the oxygen and water can be better dissolved, the oxygen dissolving efficiency is higher, and it is more conducive to the growth of aquatic products. At the same time, the number of times the dissolved oxygen needs to be replenished is reduced, and the energy consumption is lower. Secondly, the gas supply device 500 delivers gas to the breeding chamber 103 through the gas pipe 501, which can adjust the air pressure at the top of the breeding chamber 103, and the water pressure of the water in the breeding chamber 103 is affected by the air pressure environment, and the water pressure of the water in the breeding chamber 103 can be indirectly adjusted, so that the water pressure environment at different depths can be simulated, and the pressure requirements of aquatic products grown under different environmental pressures can be met. In addition, since the biochemical tank body 301 is a closed structure, it is difficult for external light to enter the biochemical chamber 302, which is just suitable for the photophobic habits of nitrifying bacteria. Moreover, the oxygen discharged by the oxygen supply device 400 will remain in the biochemical chamber 302 and cannot be discharged at will, which is beneficial to the full utilization of aerobic nitrifying bacteria and more conducive to the growth of photophobic aerobic nitrifying bacteria, thereby achieving a better effect in reducing the ammonia nitrogen content in the water.

[0061] It should be noted that the breeding tank body 101 may also be provided with a seedling opening 124, which may be provided with an openable and closable closed cover, and the seedling opening 124 is used to put in fish fry or other aquatic product seedlings. The breeding tank body 101 may also be provided with a first observation window 125 to facilitate observation of the situation in the breeding chamber 103. The top of the biochemical tank body 301 may also be provided with a feeding port 312, which may be provided with an openable and closable closed cover, and the feeding port 312 is used to put nitrifying bacteria and the like into the biochemical tank body 301. The biochemical tank body 301 may also be provided with a second observation window 313, which may be one or more, for example, two may be provided, one provided on the side of the biochemical tank body 301, and one provided on the top of the biochemical tank body 301, and the second observation window 313 is used to observe the situation in the biochemical chamber 302.

[0062] If a feeding port and a cover for opening and closing the feeding port are directly provided on the culture tank 101, when feeding into the culture chamber 103 and opening the cover, the culture chamber 103 will be connected to the external environment, causing the air pressure in the culture chamber 103 to drop rapidly to atmospheric pressure, which will in turn cause the water pressure in the culture chamber 103 to drop rapidly, thereby affecting the growth of aquatic products in the culture chamber 103 and even causing the death of aquatic products in the culture chamber 103. Figure 3 As shown, in some embodiments of the present invention, the feeding assembly 102 includes a feeding cylinder 106 and a pressure regulating mechanism. The feeding cylinder 106 is arranged at the top of the breeding tank 101 and communicates with the breeding chamber 103. The top of the feeding cylinder 106 is provided with a first valve 107, and the bottom of the feeding cylinder 106 is provided with a second valve 108. The feeding cylinder 106 forms a storage chamber 109 between the first valve 107 and the second valve 108. The pressure regulating mechanism is arranged in the feeding cylinder 106 to adjust the air pressure in the storage chamber 109. For example, the top and bottom of the feeding cylinder 106 can be penetrated, the first valve 107 is used to open and close the top of the feeding cylinder 106, the second valve 108 is used to open and close the bottom of the feeding cylinder 106, and the pressure regulating mechanism is used to adjust the air pressure in the storage chamber 109, and can at least adjust the air pressure in the storage chamber 109 to close to the atmospheric pressure, and to close to the air pressure in the breeding chamber 103.

[0063] In the present embodiment, when it is necessary to feed the culture chamber 103, the air pressure in the storage chamber 109 can be adjusted to be close to the atmospheric pressure through the pressure regulating mechanism. The air pressures on both sides of the first valve 107 are similar, so the first valve 107 can be easily opened. After the feed is poured into the storage chamber 109, the first valve 107 is closed, and then the air pressure in the storage chamber 109 is adjusted to be close to the air pressure in the culture chamber 103 through the pressure regulating mechanism. The air pressures on both sides of the second valve 108 are similar, so the second valve 108 can be easily opened. The feed in the storage chamber 109 can also be easily dropped into the culture chamber 103. Before opening the second valve 108, since the air pressure in the storage chamber 109 is close to the air pressure in the culture chamber 103, the air pressure in the culture chamber 103 will not be affected, thereby not affecting the growth of aquatic products in the culture chamber 103, and not causing the death of aquatic products in the culture chamber 103. The use is more convenient and the practicability is better.

[0064] refer to Figure 3 As shown, in some embodiments of the present invention, the pressure regulating mechanism includes a first regulating tube 110 and a second regulating tube 112, one end of the first regulating tube 110 is connected to the feeding cylinder 106 and connected to the storage chamber 109, and the other end is used to connect to the atmosphere, the first regulating tube 110 is provided with a third valve 111, one end of the second regulating tube 112 is connected to the feeding cylinder 106 and connected to the storage chamber 109, and the other end is connected to the breeding tank 101 and connected to the breeding chamber 103, and the second regulating tube 112 is provided with a fourth valve 113.

[0065] In this embodiment, the third valve 111 is opened, and the storage chamber 109 can be connected to the external atmospheric environment through the first regulating tube 110, so that the air pressure in the storage chamber 109 can be quickly adjusted to close to the atmospheric pressure. The fourth valve 113 is opened, and the storage chamber 109 can be connected to the breeding chamber 103 through the second regulating tube 112, so that the air pressure in the storage chamber 109 can be quickly adjusted to close to the air pressure in the breeding chamber 103. It not only has a simple structure and convenient operation, but also has high adjustment accuracy and better practicality.

[0066] It should be noted that the pressure regulating mechanism may also be other structures, for example, it may also be an air pump, which can also adjust the air pressure of the storage chamber 109 by pumping or releasing air from the storage chamber 109. When the structure of the pressure regulating mechanism is different, the structure of the feeding component 102 is also different accordingly, which will not be described in detail here.

[0067] In some embodiments of the present invention, the first valve 107, the second valve 108, the third valve 111 and the fourth valve 113 can all be solenoid valves, and a plurality of visual sensors can be provided in the breeding chamber 103. The first valve 107, the second valve 108, the third valve 111, the fourth valve 113 and the visual sensor can all be connected to an external control system. The control system has a database and stores an algorithm program. The database stores a large amount of data information, including data information such as the activity status of different aquatic products at different growth stages, the required feeding frequency and the required feed quantity. The visual sensor can monitor the activity status of the aquatic products in real time and send the activity status information of the aquatic products to the database. The control system compares the information sent by the visual sensor with the data information in the database through the algorithm program to determine whether the aquatic products are in a hungry state or a full state, and controls the opening and closing of the first valve 107, the second valve 108, the third valve 111 and the fourth valve 113 according to the judgment result, thereby realizing precise feeding, which not only makes breeding more convenient, but also has higher breeding efficiency and better effect, and can reduce feed waste and lower economic cost.

[0068] It should be noted that, in some other embodiments of the present invention, the first valve 107 , the second valve 108 , the third valve 111 and the fourth valve 113 may also be manual valves.

[0069] refer to Figure 2 and Figure 8 As shown, in some embodiments of the present invention, a first water outlet pipe 105 is arranged in the middle of the bottom end of the breeding tank body 101, and two first water inlet pipes 104 are arranged, and the two first water inlet pipes 104 are respectively connected to the two ends of the length direction of the breeding tank body 101, and along the projection of the length direction of the breeding tank body 101, the connection positions of the two first water inlet pipes 104 and the breeding tank body 101 are respectively located on the opposite sides of the breeding tank body 101. When the two first water inlet pipes 104 supply water at the same time, the water in the breeding cavity 103 forms a vortex under the impetus of the water discharged from the two first water inlet pipes 104.

[0070] For example, the first water outlet pipe 105 is used to discharge water mixed with excrement and feed residues. The two ends of the length direction of the breeding tank body 101 can be the first end and the second end respectively. One of the first water inlet pipes 104 is arranged at the first end, and the other first water inlet pipe 104 is arranged at the second end. Along the projection of the length direction of the breeding tank body 101, the water outlet positions of the two first water inlet pipes 104 can be respectively located on both sides of the width direction of the breeding tank body 101. The water outlet direction of the first water inlet pipe 104 can be the length direction of the breeding tank body 101, that is, the water outlet direction of one of the first water inlet pipes 104 points from the first end to the second end, and the water outlet direction of the other first water inlet pipe 104 points from the second end to the first end.

[0071] In this way, when the two first water inlet pipes 104 supply water at the same time, the water in the culture chamber 103 can form a vortex under the impetus of the water discharged from the two first water inlet pipes 104, and the center of the vortex is close to the middle of the culture tank 101. In this way, when the water forming the vortex flows, it can drive the excrement and feed residues in the culture chamber 103 to gradually move to the vicinity of the first water outlet pipe 105 in the middle of the culture tank 101, thereby facilitating the rapid and thorough discharge of the excrement and feed residues through the first water outlet pipe 105, which is more conducive to the growth of aquatic products. In addition, the water flow also makes the dissolved oxygen effect better.

[0072] The water discharged from the first water outlet pipe 105 is filtered, nitrified, sterilized and otherwise treated, and then flows back into the aquaculture chamber 103 of the aquaculture tank 101 through the first water inlet pipe 104. However, during the long-term aquaculture process, a certain amount of water will be absorbed by aquatic products, and some water may also be wasted in other ways. Figure 2 and Figure 8 As shown, in some embodiments of the present invention, the first water supply pipe 114 is connected to both ends of the breeding tank 101 in the length direction, and the first water supply pipe 114 can regularly replenish the reduced water in the breeding cavity 103, so that the water volume in the breeding cavity 103 meets the requirements for aquatic product breeding. Moreover, the first water inlet pipe 104 and the first water supply pipe 114 at the same end of the breeding tank 101 are respectively located on opposite sides of the breeding tank 101. When the two first water supply pipes 114 supply water at the same time, the water in the breeding cavity 103 forms a vortex under the impetus of the water discharged from the two first water supply pipes 114.

[0073] For example, one of the first water supply pipes 114 is arranged at the first end, and the other first water supply pipe 114 is arranged at the second end, and along the projection of the length direction of the aquaculture tank 101, the water outlet positions of the two first water supply pipes 114 can be respectively located on both sides of the width direction of the aquaculture tank 101, and the water outlet direction of the first water supply pipes 114 can be the length direction of the aquaculture tank 101, that is, the water outlet direction of one of the first water supply pipes 114 points from the first end to the second end, and the water outlet direction of the other first water supply pipe 114 points from the second end to the first end. When the two first water supply pipes 114 supply water at the same time, the water in the aquaculture cavity 103 forms a vortex under the impetus of the water discharged from the two first water supply pipes 114, and the center position of the vortex is close to the middle position of the aquaculture tank 101. In this way, the swirling water can drive the excrement and feed residues in the culture chamber 103 to gradually move to the vicinity of the first water outlet pipe 105 in the middle of the culture tank 101, thereby facilitating the rapid and thorough discharge of the excrement and feed residues through the first water outlet pipe 105, which is more conducive to the growth of aquatic products. In addition, the water flow also makes the dissolved oxygen effect better.

[0074] refer to Figure 7 and Figure 8As shown, in some embodiments of the present invention, the breeding device 100 also includes a sewage discharge component 126, and the sewage discharge component 126 includes a sewage collecting cylinder 127 and a filter tube 128. The sewage collecting cylinder 127 can be arranged in the middle position of the bottom end of the breeding tank 101, and the top end of the sewage collecting cylinder 127 is connected to the breeding chamber 103 and is provided with a first filter screen 129. The first water outlet pipe 105 is connected to the sewage collecting cylinder 127. The filter tube 128 can be vertically arranged in the breeding chamber 103, and the top end of the filter tube 128 extends to the top end of the breeding chamber 103 and is closed. The bottom end of the filter tube 128 is connected to the sewage collecting cylinder 127, and the top end of the side wall of the filter tube 128 is provided with a plurality of first filter holes 130, and the bottom end of the side wall of the filter tube 128 is provided with a plurality of second filter holes 131.

[0075] For example, the top of the dirt collection barrel 127 can be provided through, the first filter screen 129 is provided at the top of the dirt collection barrel 127, and the aperture of the filter hole of the first filter screen 129 is larger than the size of the excrement and feed residue of the aquatic product, but smaller than the size of the aquatic product. The bottom end of the filter tube 128 can be provided through and extend into the dirt collection barrel 127, the first filter screen 129 can surround the circumference of the filter tube 128 and be connected to the outer wall of the filter tube 128, and the aperture of the first filter hole 130 and the second filter hole 131 is larger than the size of the excrement and feed residue of the aquatic product, but smaller than the size of the aquatic product.

[0076] In this embodiment, during the breeding process, the excrement and feed residues of the aquatic products can enter the sewage collection cylinder 127 through the filter holes of the first filter screen 129, and then be discharged through the first outlet pipe 105, which has a better sewage discharge effect and is more conducive to the growth of aquatic products. The first filter screen 129 can prevent the aquatic products from being discharged through the first outlet pipe 105 and causing economic losses. A filter tube 128 is provided, and a plurality of first filter holes 130 and a plurality of second filter holes 131 are respectively provided at the top and bottom ends of the side walls of the filter tube 128. Excrement and feed residues floating on the top of the breeding chamber 103 can enter the filter tube 128 through the first filter holes 130, and then be discharged through the sewage collecting cylinder 127 and the first water outlet pipe 105. Excrement and feed residues at the bottom of the breeding chamber 103 can enter the filter tube 128 through the second filter holes 131, and then be discharged through the sewage collecting cylinder 127 and the first water outlet pipe 105. In this way, the sewage discharge effect of the breeding tank 101 is better, and the water in the breeding chamber 103 is cleaner, which is more conducive to the growth of aquatic products.

[0077] It should be noted that the top of the sewage collecting cylinder 127 can extend into the breeding chamber 103, or the bottom of the breeding tank 101 can be provided with a sewage outlet, and the top of the sewage collecting cylinder 127 is connected to the sewage outlet.

[0078] refer to Figure 2 , Figures 4 to 6As shown, in some embodiments of the present invention, the breeding device 100 also includes a first liquid level gauge assembly 115, the first liquid level gauge assembly 115 includes a liquid level gauge body 116, a first connecting pipe 117 and a second connecting pipe 118, the first connecting pipe 117 is connected to the top of the liquid level gauge body 116, one end of the first connecting pipe 117 is connected to the breeding tank body 101 and connected to the breeding cavity 103, the gas supply pipe 501 is connected to the first connecting pipe 117, the second connecting pipe 118 is connected to the bottom end of the liquid level gauge body 116, and the second connecting pipe 118 is connected to the breeding tank body 101 and connected to the breeding cavity 103.

[0079] For example, the level gauge body 116 can be vertically arranged, the level gauge body 116 can be a round tube structure, the level gauge body 116 can be made of transparent materials, for example, made of transparent glass or transparent plastic, the level gauge body 116 can be provided with a plurality of scale lines, and the plurality of scale lines can be evenly arranged along the length direction of the level gauge body 116. The scale lines are provided to facilitate the staff to accurately observe the liquid level height of the water in the breeding chamber 103. The top of the level gauge body 116 can be connected to one end of the first connecting pipe 117, and the other end of the first connecting pipe 117 can be welded to the top of the breeding tank body 101 or connected by other suitable methods. The top of the breeding tank body 101 can be provided with a connecting hole corresponding to the first connecting pipe 117, and the first connecting pipe 117 is connected to the breeding chamber 103 of the breeding tank body 101 through the connecting hole. The bottom end of the level meter body 116 can be connected to one end of the second connecting pipe 118, and the other end of the second connecting pipe 118 can be welded to the bottom end of the breeding tank 101 or connected in other suitable ways. The bottom end of the breeding tank 101 can be provided with a connecting hole corresponding to the second connecting pipe 118, and the second connecting pipe 118 is connected to the breeding chamber 103 of the breeding tank 101 through the connecting hole. The bottom end of the level meter body 116 is connected to the liquid space at the bottom end of the breeding chamber 103, and the top end of the level meter body 116 is connected to the gas space at the top end of the breeding chamber 103, so that the staff can observe the liquid level of the water in the breeding chamber 103 conveniently.

[0080] In the present invention, the aquaculture tank body 101 can be processed with two connecting holes corresponding to the first liquid level gauge assembly 115, one of which is close to the top of the aquaculture tank body 101, and the other is close to the bottom of the aquaculture tank body 101. The gas pipe 501 can be connected to the first connecting pipe 117 in advance in the factory. When assembling the aquaculture tank, one end of the first connecting pipe 117 is connected to the top of the aquaculture tank body 101, and communicated with the aquaculture cavity 103 through the connecting hole at the top of the aquaculture tank body 101, and one end of the second connecting pipe 118 is connected to the bottom of the aquaculture tank body 101, and communicated with the aquaculture cavity 103 through the connecting hole at the bottom of the aquaculture tank body 101. It is not necessary to connect the gas pipe 501 to the aquaculture tank body 101, which makes assembly more convenient, and the aquaculture tank body 101 does not need to be processed with a connecting hole for connecting the gas pipe 501, and the aquaculture tank body 101 is more convenient to process. In addition, the number of connecting holes on the aquaculture tank body 101 is reduced, so that the sealing of the aquaculture tank body 101 is better.

[0081] refer to Figure 4 and Figure 6 As shown, in some embodiments of the present invention, the first liquid level meter assembly 115 further includes a sampling tube 119, the sampling tube 119 is connected to the second connecting tube 118, and the sampling tube 119 is provided with a fifth valve 120. For example, the sampling tube 119 can be connected to the bottom of the second connecting tube 118, the sampling tube 119 can extend downward, and the fifth valve 120 can be a manual valve or an automatic valve.

[0082] In this embodiment, during the fish farming process, the fifth valve 120 closes the sampling tube 119 to prevent the water in the farming chamber 103 from flowing out of the sampling tube 119. When it is necessary to detect whether the water in the farming chamber 103 meets the farming requirements, the fifth valve 120 can be opened to take out a small amount of water from the sampling tube 119 for testing. The operation is simple and convenient, saving time and effort. In addition, the sampling tube 119 is arranged on the second connecting tube 118, which not only facilitates the outflow of water in the farming chamber 103, but also does not need to connect the sampling tube 119 to the farming tank body 101 when assembling the farming tank body 101, making the assembly more convenient, and there is no need to process additional connection holes on the farming tank body 101 for connecting the sampling tube 119, making the farming tank body 101 more convenient to process. In addition, the number of connection holes on the farming tank body 101 is reduced, which also makes the sealing of the farming tank body 101 better.

[0083] refer to Figure 4 and Figure 5In some embodiments of the present invention, the first connecting pipe 117 is provided with a pressure sensor 121 for detecting the air pressure in the breeding chamber 103, and the gas supply pipe 501 is provided with a sixth valve 502, which opens or closes the gas supply pipe 501 according to the air pressure value detected by the pressure sensor 121. For example, the sixth valve 502 can be a solenoid valve, and the pressure sensor 121 and the sixth valve 502 can both be connected to the control system of the closed fishery circulation breeding system. When the pressure sensor 121 detects that the air pressure in the breeding chamber 103 is less than a preset value, it sends a signal to the controller of the control system. The controller controls the sixth valve 502 to open the gas pipe 501, and the gas pipe 501 can replenish air into the breeding chamber 103 in time, so that the air pressure in the breeding chamber 103 rises to a pressure that meets the requirements of aquatic products. When the air pressure in the breeding chamber 103 rises to the required air pressure, the pressure sensor 121 senses and sends a signal to the controller, and the controller controls the sixth valve 502 to close the gas pipe 501 and stop the air intake. It has a high degree of automation, is more convenient to use, and has more precise air pressure regulation, which is more conducive to the growth of aquatic products.

[0084] refer to Figure 2 As shown, in some embodiments of the present invention, a seventh valve 122 is provided at the top of the breeding tank 101, and the seventh valve 122 is connected to the breeding chamber 103. The seventh valve 122 is a pressure balancing valve, and the seventh valve 122 can switch between an open state and a closed state according to the air pressure value detected by the pressure sensor 121. For example, the seventh valve 122 can be a solenoid valve, and the seventh valve 122 can be connected to the control system of the closed fishery circulation breeding system. When the pressure sensor 121 detects that the air pressure in the breeding chamber 103 is greater than a preset value, it sends a signal to the controller of the control system. The controller controls the seventh valve 122 to open, and part of the gas in the breeding chamber 103 can be discharged through the seventh valve 122, so that the air pressure in the breeding chamber 103 drops to a pressure that meets the requirements of aquatic products. When the air pressure in the breeding chamber 103 drops to the required air pressure, the pressure sensor 121 senses and sends a signal to the controller, and the controller controls the seventh valve 122 to close and stop exhausting. It has a high degree of automation and is more convenient to use. The air pressure regulation is more precise, which is more conducive to the growth of aquatic products. In addition, it can avoid explosion due to excessive air pressure in the breeding chamber 103, and has better safety.

[0085] It should be noted that, in some other embodiments of the present invention, the gas pipe 501 may also be configured to be capable of both air intake and exhaust.

[0086] refer to Figure 4 and Figure 6As shown, in some embodiments of the present invention, the second connecting pipe 118 is provided with a pressure gauge 123 for detecting the water pressure in the culture chamber 103. The pressure gauge 123 is provided to facilitate the staff to timely and intuitively understand the water pressure in the culture chamber 103, and then timely handle to adjust the water pressure in the culture chamber 103 to the required pressure, which is more conducive to the growth of aquatic products.

[0087] refer to Fig.10 As shown, in some embodiments of the present invention, a detachable end cap 132 is provided on one side of the breeding tank body 101, and an interception plate 133 is provided on one end of the bottom surface of the breeding chamber 103 close to the end cap 132, and a take-out port is formed between the top surface of the interception plate 133 and the top surface of the breeding chamber 103. For example, the end cap 132 and the breeding tank body 101 can be connected or snap-fitted by fasteners, and the interception plate 133 and the breeding tank body 101 can be integrally formed or welded. Of course, the interception plate 133 and the breeding tank body 101 can also be detachably connected, for example, connected or snap-fitted by fasteners, and the two sides of the interception plate 133 can abut or be connected to the side walls of the breeding chamber 103. The interception plate 133 can be a mesh structure to reduce the interception plate 133 from hindering the flow of water.

[0088] In this embodiment, when the aquatic product breeding is completed, the end cover 132 is opened to take out the bred aquatic products. Since the interception plate 133 is provided, the aquatic products can be prevented from being directly poured out after the end cover 132 is opened. The staff can slowly take them out from the taking port between the top surface of the interception plate 133 and the top surface of the breeding chamber 103, which is more convenient to use.

[0089] It should be noted that, in some other embodiments of the present invention, the breeding tank body 101 may also be an integrated structural component, and the fish outlet pipe 134 may be directly provided on the breeding tank body 101 , and a valve may be provided on the fish outlet pipe 134 .

[0090] refer to Fig. 9 As shown, in some embodiments of the present invention, the oxygen supply device 400 further includes a plurality of aeration plates 402 disposed at the bottom of the culture chamber 103, the plurality of aeration plates 402 are connected to the oxygen supply pipe 401, and the aeration plates 402 are provided with a plurality of aeration holes. For example, there may be four aeration plates 402, the four aeration plates 402 are divided into two groups, and the two groups of aeration plates 402 are distributed on opposite sides of the culture tank 101.

[0091] In the present embodiment, the oxygen generated by the oxygen supply device is transported to the corresponding aeration plate 402 through the oxygen supply pipe 401, and then is exposed to the culture chamber 103 through the aeration holes, thereby realizing oxygen supply. Moreover, a plurality of aeration plates 402 are provided, and oxygen can enter the culture chamber 103 more comprehensively and evenly, so that the oxygen can fully contact with the water, and the oxygen dissolving effect is better and the oxygen dissolving efficiency is higher. Moreover, when the oxygen is exposed to the culture chamber 103 from the plurality of aeration holes of the aeration plate 402, fine bubbles are formed under high pressure, so that the oxygen can more fully contact with the water, and the oxygen dissolving effect is better and the oxygen dissolving efficiency is higher.

[0092] refer to Figures 11 to 13 As shown, in some embodiments of the present invention, the biochemical device 300 further includes a plurality of attachment structures 305, which are movably accommodated in the biochemical cavity 302, and the attachment structures 305 are provided for nitrifying bacteria to attach, wherein the water discharged from the second water inlet pipe 303 and / or the oxygen discharged from the oxygen supply device 400 into the biochemical cavity 302 can drive at least part of the attachment structures 305 to move in the biochemical tank body 301. For example, the attachment structures 305 can be porous bio-balls, porous ceramsite or other suitable filter materials, and the attachment structures 305 can roll freely in the biochemical tank body 301 when subjected to external force.

[0093] In the present invention, the water discharged from the second water inlet pipe 303 and / or the oxygen discharged from the oxygen supply device 400 into the biochemical chamber 302 can drive at least part of the attachment structure 305 to move and roll in the biochemical tank body 301, which is more conducive to the nitrifying bacteria to attach to each attachment structure 305 conveniently and evenly, and is conducive to the nitrifying bacteria to contact with oxygen more evenly and fully, which is more conducive to the growth of nitrifying bacteria, thereby achieving a better effect of reducing the ammonia nitrogen content in the water.

[0094] refer to Fig.12 As shown, in some embodiments of the present invention, the second water inlet pipe 303 is connected to the bottom of the biochemical tank body 301, and the water outlet direction of the second water inlet pipe 303 is upward, so that the water discharged from the second water inlet pipe 303 can push at least part of the attachment structure 305 to move upward. After the water in the second water inlet pipe 303 is discharged upward, it can push at least part of the attachment structure 305 to move upward. After the attachment structure 305 moves upward for a certain displacement, it moves downward again under the action of its own gravity, thereby realizing reciprocating tumbling motion, thereby being more conducive to the convenient and uniform attachment of nitrifying bacteria to each attachment structure 305, and being more conducive to the more uniform and sufficient contact between nitrifying bacteria and oxygen, thereby being more conducive to the growth of nitrifying bacteria, thereby achieving a better effect of reducing the ammonia nitrogen content in water.

[0095] refer to Fig.12As shown, in some embodiments of the present invention, the second water inlet pipe 303 includes a water outlet section 306, which is horizontally arranged at the bottom end of the biochemical tank body 301, and a plurality of water outlet holes are arranged on the top of the water outlet section 306. For example, one or more water outlet sections 306 may be provided, and the top of each water outlet section 306 is provided with a plurality of water outlet holes arranged along the length direction of the water outlet section 306.

[0096] In this way, the water in the second water inlet pipe 303 can be discharged from multiple water outlets, so that more attachment structures 305 can move upward to achieve reciprocating tumbling motion, which is more conducive to the nitrifying bacteria to attach to each attachment structure 305 conveniently and evenly, and is conducive to the nitrifying bacteria to contact with oxygen more evenly and fully, which is more conducive to the growth of nitrifying bacteria, thereby achieving a better effect in reducing the ammonia nitrogen content in the water.

[0097] refer to Fig.11 and Fig.13 As shown, in some embodiments of the present invention, two second water inlet pipes 303 are provided, and the two second water inlet pipes 303 are respectively connected to the two ends of the biochemical tank body 301 in the length direction, and along the projection of the length direction of the biochemical tank body 301, the connection positions of the two second water inlet pipes 303 and the biochemical tank body 301 are respectively located on the opposite sides of the biochemical tank body 301. When the two second water inlet pipes 303 supply water at the same time, the water in the biochemical tank body 301 forms a vortex under the impetus of the water discharged from the two second water inlet pipes 303, so as to drive at least part of the attachment structure 305 to move. For example, the two ends of the biochemical tank body 301 in the length direction may be the first end and the second end respectively, one of the second water inlet pipes 303 is arranged at the first end, and the other second water inlet pipe 303 is arranged at the second end, and along the projection of the length direction of the biochemical tank body 301, the water outlet positions of the two second water inlet pipes 303 may be located at both sides of the width direction of the biochemical tank body 301 respectively, and the water outlet direction of the second water inlet pipes 303 may be the length direction of the biochemical tank body 301, that is, the water outlet direction of one of the second water inlet pipes 303 points from the first end to the second end, and the water outlet direction of the other second water inlet pipe 303 points from the second end to the first end.

[0098] In this way, when the two second water inlet pipes 303 supply water at the same time, the water in the biochemical tank 301 can form a vortex under the impetus of the water discharged from the two second water inlet pipes 303, and the vortex water can drive at least part of the attachment structure 305 to follow the movement, which is more conducive to the nitrifying bacteria to attach to each attachment structure 305 conveniently and evenly, and is conducive to the nitrifying bacteria to contact with oxygen more evenly and fully, which is more conducive to the growth of nitrifying bacteria, thereby better reducing the ammonia nitrogen content in the water.

[0099] During the long-term breeding process, a certain amount of water will be absorbed by aquatic products. In addition, some water may be wasted in other ways. Fig.11 and Fig.13 As shown, in some embodiments of the present invention, both ends of the biochemical tank body 301 in the length direction are connected to the second water supply pipe 307, and the second water supply pipe 307 can regularly supply a certain amount of water. Moreover, the second water inlet pipe 303 and the second water supply pipe 307 at the same end of the biochemical tank body 301 are respectively located on opposite sides of the biochemical tank body 301. When the two second water supply pipes 307 supply water at the same time, the water in the biochemical tank body 301 forms a vortex under the impetus of the water discharged from the two second water supply pipes 307, so as to drive at least part of the attachment structure 305 to move. For example, one of the second water supply pipes 307 is arranged at the first end, and the other second water supply pipe 307 is arranged at the second end, and along the projection of the length direction of the biochemical tank body 301, the water outlet positions of the two second water supply pipes 307 can be respectively located on both sides of the width direction of the biochemical tank body 301, and the water outlet direction of the second water supply pipes 307 can be the length direction of the biochemical tank body 301, that is, the water outlet direction of one of the second water supply pipes 307 points from the first end to the second end, and the water outlet direction of the other second water supply pipe 307 points from the second end to the first end.

[0100] In this way, when the two second water supply pipes 307 supply water at the same time, the water in the biochemical chamber 302 forms a vortex under the impetus of the water discharged from the two second water supply pipes 307, and the vortex water can drive at least part of the attachment structure 305 to follow the movement, which is more conducive to the nitrifying bacteria to attach to each attachment structure 305 conveniently and evenly, and is conducive to the nitrifying bacteria to contact with oxygen more evenly and fully, which is more conducive to the growth of nitrifying bacteria, thereby better reducing the ammonia nitrogen content in the water.

[0101] refer to Fig.12 As shown, in some embodiments of the present invention, the oxygen supply device 400 also includes an aeration pipe 403, which is horizontally arranged at the bottom end of the biochemical tank 301. The aeration pipe 403 can be provided with one or more aeration pipes. When there are multiple aeration pipes, they can be in a mesh structure. The top of the aeration pipe 403 is provided with multiple aeration holes. The oxygen supply pipe 401 is connected to the aeration pipe 403 to input oxygen into the aeration pipe 403, wherein the oxygen discharged from the aeration hole can push at least part of the attachment structure 305 to move upward.

[0102] After the oxygen in the oxygen supply pipe 401 is discharged upward from the multiple aeration holes, it can push at least part of the attachment structure 305 to move upward. After the attachment structure 305 moves upward for a certain displacement, it moves downward again under the action of its own gravity, thereby realizing reciprocating tumbling motion, which is more conducive to the nitrifying bacteria to attach to each attachment structure 305 conveniently and evenly, and is conducive to the nitrifying bacteria to contact with oxygen more evenly and fully, which is more conducive to the growth of nitrifying bacteria, thereby having a better effect of reducing the ammonia nitrogen content in the water.

[0103] refer to Fig.13As shown, in some embodiments of the present invention, the biochemical tank body 301 is provided with a water collecting cylinder 308, the water outlet pipe is connected to the water collecting cylinder 308, the water collecting cylinder 308 is provided with an opening connected to the inner cavity of the biochemical tank body 301, the opening is provided with a second filter 309, and the second filter 309 restricts the attachment structure 305 from passing through. The water collecting cylinder 308 is provided to facilitate the rapid discharge of water treated by nitrifying bacteria in the biochemical tank body 301, and the second filter 309 is provided to prevent the attachment structure 305 from being discharged with the water, thereby causing waste of the attachment structure 305.

[0104] It should be noted that the biochemical tank body 301 may also be provided with a second liquid level gauge assembly 310, and the structure and installation method of the second liquid level gauge assembly 310 may be the same as the structure and installation method of the first liquid level gauge assembly 115 on the aquaculture tank body 101. In addition, a gas delivery pipe 501 may also be provided between the gas supply device 500 and the connecting pipe at the top of the second liquid level gauge assembly 310, and an eighth valve 311 may be provided at the top of the biochemical tank body 301. In this way, similar to the aquaculture tank body 101, the pressure in the biochemical chamber 302 of the biochemical tank body 301 can be adjusted by delivering gas through the gas delivery pipe 501 connected to the second liquid level gauge assembly 310 and by opening and closing the eighth valve 311, so that the pressure in the biochemical chamber 302 is more suitable for the growth of nitrifying bacteria.

[0105] refer to Figures 14 to 18As shown, in some embodiments of the present invention, the closed fishery circulation aquaculture system further includes a filter device 600, which includes a housing 601, a filter cartridge 606, and a water outlet assembly 607. The housing 601 is provided with a water inlet chamber 602 and a water purification chamber 603, the water inlet chamber 602 and the water purification chamber 603 are separated, the water inlet chamber 602 is provided with a water inlet 604, the water inlet 604 is connected to the water circulation pipeline 200, and the water inlet 604 is provided to allow the water to be filtered in the water circulation pipeline 200 to enter, and the water purification chamber 603 is provided with a water outlet 605, the water outlet 605 is connected to the water circulation pipeline 200, and the water outlet 605 is provided to allow the filtered water to be discharged into the water circulation pipeline 200. The filter cartridge 606 may be cylindrical, and the filter cartridge 606 may be located in the water purification chamber 603 as a whole. The number of the filter cartridges 606 may be one or more. One end of the filter cartridge 606 in the length direction is opened and connected to the water inlet chamber 602. The side wall of the filter cartridge 606 may be provided with a filter membrane or other suitable filtering structure. The water outlet assembly 607 includes a movable portion 608, a sliding portion 609, a sewage pipe 610 and an elastic member 611. The movable portion 608 may be movably arranged on the housing 601. The movable portion 608 may be movable in a variety of ways, for example, it may be rotating or moving. The sliding portion 609 is slidably connected to the movable portion 608, and the sliding direction of the sliding portion 609 may be parallel to the length direction of the filter cartridge 606. The sewage pipe 610 is connected to the sliding portion 609, and the elastic member 611 is arranged between the movable portion 608 and the sliding portion 609. Among them, the movable part 608 can move to connect or separate the sewage pipe 610 with the filter cartridge 606, and when the sewage pipe 610 is connected with the filter cartridge 606, the elastic force of the elastic member 611 makes the sliding part 609 have a sliding tendency, and this sliding tendency makes the sewage pipe 610 on the elastic member 611 have a tendency to move toward the direction close to the filter cartridge 606.

[0106] In the present invention, when it is necessary to filter water, the movable part 608 is movably adjusted to separate the sewage pipe 610 from the open end of the filter cartridge 606, and the water to be filtered enters the water inlet chamber 602 through the water inlet 604, and then enters the filter cartridge 606 through the open end of the filter cartridge 606, enters the clean water chamber 603 after being filtered by the filter cartridge 606, and finally is discharged from the water outlet 605. When it is necessary to clean the filter cartridge 606, the movable part 608 is movably adjusted to connect the sewage pipe 610 with the open end of the filter cartridge 606, and then the inner cavity of the filter cartridge 606 is connected to the atmosphere, and the pressure in the clean water chamber 603 is greater than the pressure in the filter cartridge 606. The water in the clean water chamber 603 can be reversely entered into the filter cartridge 606 through the pressure difference, so that the filter cartridge 606 is cleaned, and the sewage generated by the cleaning can be discharged through the sewage pipe 610.

[0107] According to the filtering device 600 of the embodiment of the present invention, when the filter cartridge 606 is cleaned, the sewage pipe 610 is connected with the filter cartridge 606. Through the elastic force of the elastic member 611, the sliding portion 609 can have a sliding tendency to drive the sewage pipe 610 to move in the direction close to the filter cartridge 606. However, since the sewage pipe 610 is blocked, it cannot move in the direction close to the filter cartridge 606, but only has a tendency to move. The sewage pipe 610 is continuously acted upon by the elastic force of the elastic member 611, and the sewage pipe 610 can be connected with the filter cartridge 606 more closely, thereby improving the cleaning effect of the filter cartridge 606.

[0108] refer to Figures 15 to 18 As shown, in some embodiments of the present invention, a sewage pipe 610 is provided with a water inlet end 612, a partition 613 is provided in the shell 601 and a water inlet chamber 602 and a clean water chamber 603 are formed by dividing the water inlet chamber 602 and the clean water chamber 603 by the partition 613, the partition 613 is provided with a connecting port 614 connecting the water inlet chamber 602 and the filter cartridge 606, the elastic force of the elastic member 611 makes the water inlet end 612 close to the end surface of the partition 613, and the movable part 608 can move to connect or separate the water inlet end 612 with the connecting port 614.

[0109] In this embodiment, a partition 613 is provided to achieve a better separation effect between the water inlet chamber 602 and the clean water chamber 603, and the elastic force of the elastic member 611 makes the sewage pipe 610 tend to move toward the direction close to the partition 613, so that the water inlet end 612 of the sewage pipe 610 can always be close to the end face of the partition 613. In this way, when the filter cartridge 606 is filtering, it is possible to prevent the unfiltered water in the water inlet chamber 602 from directly entering the sewage pipe 610 through the gap between the sewage pipe 610 and the partition 613, thereby reducing the filtering effect. When the filter cartridge 606 is cleaned, the water inlet end 612 of the sewage pipe 610 can be more closely connected to the connecting port 614, and thus more closely connected to the filter cartridge 606, thereby achieving a better cleaning effect on the filter cartridge 606.

[0110] refer to Figures 15 to 18 As shown, in some embodiments of the present invention, during the movement of the movable portion 608, the water inlet end 612 moves in a direction parallel to the end surface of the partition 613. In this way, when the movable portion 608 moves and drives the water inlet end 612 of the sewage pipe 610 to move, the water inlet end 612 of the sewage pipe 610 is always in close contact with the end surface of the partition 613, which is more practical.

[0111] refer to Fig.18 and Fig.19As shown, in some embodiments of the present invention, the water outlet assembly 607 further includes an elastic ring 615, the elastic ring 615 is provided with a connection groove, the connection groove extends along the circumference of the elastic ring 615 to form a ring, and the side of the water inlet end 612 close to the partition 613 is inserted into the connection groove. The elastic ring 615 can be made of elastic rubber or elastic plastic, and the elastic ring 615 is provided on the side of the water inlet end 612 close to the partition 613. The water inlet end 612 elastically abuts against the end surface of the partition 613 through the elastic ring 615, so that the sealing effect between the water inlet end 612 and the partition 613 is better.

[0112] refer to Figures 15 to 18 As shown, in some embodiments of the present invention, a plurality of filter cartridges 606 are provided, and the plurality of filter cartridges 606 are parallel to each other, and the movable portion 608 can be movable to connect the sewage pipe 610 with different filter cartridges 606. For example, the partition 613 can be provided with a communication port 614 corresponding to each filter cartridge 606, and the same end of the plurality of filter cartridges 606 is connected to the partition 613. In this embodiment, a plurality of filter cartridges 606 are provided, which has a better filtering effect on water, a higher filtering efficiency, and better practicality.

[0113] refer to Figures 15 to 18 As shown, in some embodiments of the present invention, the movable part 608 is rotatably arranged on the shell 601, and the rotation axis of the movable part 608 is parallel to the length direction of the filter cartridge 606. The filter cartridge 606 includes at least two groups, and each group of filter cartridges 606 includes a plurality of filter cartridges 606 arranged circumferentially along the rotation axis. The distances between the filter cartridges 606 of different groups and the rotation axis are different. The sewage pipe 610 is provided with a water inlet end 612 corresponding to each group of filter cartridges 606, and the movable part 608 can be rotated so that the water inlet end 612 is connected with a corresponding group of multiple filter cartridges 606 in sequence. For example, the filter cartridge 606 may include two groups, each group of filter cartridges 606 includes multiple filter cartridges 606, and the multiple filter cartridges 606 in the same group may be evenly arranged along the circumference of the rotation axis of the movable part 608. The distances between the center lines of the filter cartridges 606 in different groups and the rotation axis of the movable part 608 are different. The sewage pipe 610 may be provided with a water inlet end 612 corresponding to each group of filter cartridges 606, and the distances between the two water inlet ends 612 and the rotation axis of the movable part 608 are different. When the movable part 608 rotates, one of the water inlet ends 612 is connected in sequence with the multiple filter cartridges 606 corresponding to one group, and the other water inlet end 612 is connected in sequence with the multiple filter cartridges 606 corresponding to another group. In this way, at least two filter cartridges 606 can be cleaned at the same time, thereby increasing the cleaning efficiency and achieving better cleaning effect of the filter cartridges 606.

[0114] It should be noted that in some other embodiments of the present invention, multiple filter cartridges 606 may be arranged circumferentially along the rotation axis of the movable part 608 to form a circle, and the movable part 608 can be rotated to connect the sewage pipe 610 with the multiple filter cartridges 606 in sequence.

[0115] refer to Figures 14 to 18 As shown, in some embodiments of the present invention, the movable part 608 is configured as a rotating shaft, and the water outlet assembly 607 further includes a driving motor 616, which is disposed in the housing 601 and connected to the rotating shaft to drive the rotating shaft to rotate. For example, the driving motor 616 can be disposed on a side of the clean water chamber 603 away from the water inlet chamber 602, and a sleeve can be disposed in the clean water chamber 603, and the rotating shaft is passed through the sleeve. When the driving motor 616 is started, the driving motor 616 can drive the rotating shaft to rotate, and the rotating shaft can thereby drive the sewage pipe 610 to move, which has a higher degree of automation, is more convenient to operate, and saves time and effort.

[0116] refer to Fig. 20 As shown, in some embodiments of the present invention, the rotating shaft is provided with a first connecting portion 617, the sliding portion 609 includes a sliding sleeve 618 and a connecting sleeve 619, the sliding sleeve 618 is sleeved on the outer side of the rotating shaft, the sliding sleeve 618 is connected to the second connecting portion 620, the elastic member 611 is configured as a coil spring, the coil spring is sleeved on the outer side of the sliding sleeve 618, the two ends of the coil spring are respectively connected to the first connecting portion 617 and the second connecting portion 620, the connecting sleeve 619 is sleeved on the outer side of the coil spring, the connecting sleeve 619 is connected to the second connecting portion 620, and the sewage pipe 610 is connected to the connecting sleeve 619. For example, the first connection part 617 can be a plate-like structure and connected to the end face of the end of the rotating shaft, the sliding sleeve 618 can be fitted on the outer wall of the end of the rotating shaft, the second connection part 620 can be connected to the end of the sliding sleeve 618 away from the first connection part 617, one end of the connecting sleeve 619 can be sealed connected to the second connection part 620, and the other end can be sealed connected to the sewage pipe 610, and the coil spring can be located in the gap between the connecting sleeve 619 and the sliding sleeve 618.

[0117] In this embodiment, the elastic member 611 is configured as a coil spring, which is more convenient to install and generates a greater elastic force. The sliding portion 609 is sleeved on the outer side of the rotating shaft through the sliding sleeve 618, so that the sliding portion 609 slides more accurately, avoiding the sewage pipe 610 from swinging, thereby making the water inlet end 612 of the sewage pipe 610 and the filter cartridge 606 more closely connected. In addition, the coil spring is located between the connecting sleeve 619 and the sliding sleeve 618, which can prevent the water in the water inlet cavity 602 from contacting the coil spring and corroding the coil spring, so that the service life of the coil spring is longer and the practicality is better.

[0118] It should be noted that the elastic member 611 may also be other suitable structures, for example, a disc spring, etc.

[0119] refer to Figures 14 to 18As shown, in some embodiments of the present invention, the water outlet assembly 607 further includes a drain pipe 621, the drain pipe 621 is provided at the housing 601, the drain pipe 621 is provided with a ninth valve 622, and the sewage pipe 610 has a water outlet end 623, and the water outlet end 623 is rotatably connected to the drain pipe 621. For example, when the water inlet chamber 602 is located below the water purification chamber 603 and the filter cartridge 606 extends vertically, the drain pipe 621 can be provided at the bottom end of the housing 601, the ninth valve 622 can be an automatic valve or a manual valve, and the water outlet end 623 of the sewage pipe 610 is rotatably connected to the drain pipe 621 and sealed.

[0120] In this embodiment, the water outlet end 623 of the sewage pipe 610 is rotatably connected to the drain pipe 621, and the water discharged from the sewage pipe 610 is discharged through the drain pipe 621, and the drain pipe 621 can be fixedly installed on the housing 601 and does not need to rotate with it, thereby not only making the installation of the drain pipe 621 more convenient, but also avoiding interference between the drain pipe 621 and external components. A ninth valve 622 is provided, and when the filter cartridge 606 is filtering water, the ninth valve 622 is closed, and when the filter cartridge 606 needs to be cleaned, the ninth valve 622 can be opened, and the operation is simple and convenient.

[0121] refer to Figure 1 As shown, in some embodiments of the present invention, the oxygen supply device 400 is set as an oxygen generator, and the closed fishery circulation aquaculture system also includes a heat exchange pipeline 700 for conveying a heat exchange medium, which can be water, heat transfer oil or other suitable medium. The heat exchange pipeline 700 has a first section 701 and a second section 702. The first section 701 is connected to the oxygen generator and can be close to the heat generating components such as the compressor of the oxygen generator. The second section 702 is connected to the biochemical tank body 301 and / or the water circulation pipeline 200; for example, the biochemical tank body 301 can be connected to the second section 702, the water circulation pipeline 200 can be connected to the second section 702, or the biochemical tank body 301 and the water circulation pipeline 200 can be connected to the second section 702. The heat exchange medium can absorb the heat generated by the oxygen generator when passing through the first section 701, and can exchange heat with the water in the biochemical tank body 301 and / or the water circulation pipeline 200 when passing through the second section 702.

[0122] In this embodiment, the first section 701 of the heat exchange pipeline 700 can be close to the heat generating components such as the compressor of the oxygen generator, and the second section 702 of the heat exchange pipeline 700 can be close to the water in the biochemical tank body 301 and / or the water circulation pipeline 200. In cold weather, the heat exchange medium in the heat exchange pipeline 700 can absorb the heat generated during the operation of the oxygen generator when passing through the first section 701. When the heat exchange medium after absorbing heat passes through the second section 702, it can exchange heat with the water in the biochemical tank body 301 and / or the water circulation pipeline 200, thereby heating the water. The heated water re-enters the breeding device 100 through the water circulation pipeline 200, which can reduce the loss of appetite or even death of aquatic products due to too low water temperature. The present invention uses the heat generated during the operation of the oxygen generator to heat water, does not need to set up an additional heating device, has lower economic cost, and is more energy-saving.

[0123] It should be noted that the oxygen supply device 400 may also be other equipment, for example, it may also be a plurality of oxygen cylinders or a central oxygen supply system.

[0124] refer to Figure 1 As shown, in some embodiments of the present invention, the two ends of the first section 701 are connected to the conveying sections 703, and the other ends of the two conveying sections 703 are respectively connected to the two ends of the second section 702. The third section 704 is connected between the two conveying sections 703, and the closed fishery circulation aquaculture system further includes a refrigeration device 800, and the third section 704 is connected to the refrigeration device 800, and the refrigeration device 800 is used to refrigerate the heat exchange medium passing through the third section 704. In hot weather, aquatic products may lose appetite or even die due to excessively high water temperature. In this embodiment, the connection between the first section 701 and the conveying section 703 can be disconnected, so that the conveying section 703 is connected to the third section 704, and the heat exchange medium will flow through the third section 704. The refrigeration device 800 can refrigerate the heat exchange medium passing through the third section 704. When the cooled heat exchange medium passes through the second section 702, it can absorb heat and cool the water in the biochemical tank body 301 and / or the water circulation pipeline 200. The cooled water re-enters the breeding device 100 through the water circulation pipeline 200, which can reduce the loss of appetite or even death of aquatic products due to excessively high water temperature, and has better practicality.

[0125] It should be noted that the refrigeration device 800 may be a Stirling refrigerator, a vapor compression refrigerator or other suitable refrigeration device 800, which will not be described in detail here. In order to control the flow direction of the heat exchange medium, a valve may be provided at one end of the delivery section 703 close to the first section 701, and valves may be provided at both ends of the third section 704. In addition, a second pump for driving the heat exchange medium to flow may be provided on the heat exchange pipeline 700.

[0126] refer to Figure 1As shown, in some embodiments of the present invention, the second section 702 is disposed in the biochemical chamber 302. In this embodiment, the second section 702 is disposed in the biochemical chamber 302, so that the water in the biochemical chamber 302 can be heated or cooled, and the heated or cooled water can be returned to the breeding device 100 through the water circulation pipeline 200. The second section 702 is disposed in the biochemical chamber 302, which is not only convenient to install, but also has a better effect of heating or cooling water.

[0127] In some embodiments of the present invention, the second section 702 is wound around the outside of the water circulation pipeline 200. For example, the second section 702 can be similar to a spiral and arranged around the outside of the water circulation pipeline 200. When water passes through the water circulation pipeline 200 inside the second section 702, the heat exchange medium can heat or cool the water, and the heated or cooled water can return to the breeding device 100 through the water circulation pipeline 200. The second section 702 is wound around the outside of the water circulation pipeline 200, which is not only convenient for installation, but also the second section 702 does not need to be inserted into the biochemical device 300 or the disinfection device 900, so that the biochemical device 300 or the disinfection device 900 has better sealing performance.

[0128] In some embodiments of the present invention, the second section 702 is wound around one end of the water circulation pipeline 200 close to the first water inlet pipe 104. After the water is purified and then heated or cooled, it can quickly flow back into the breeding device 100, thereby reducing the impact of the external ambient temperature on the heated or cooled water.

[0129] refer to Figure 1 As shown, in some embodiments of the present invention, the closed fishery circulation aquaculture system further includes a disinfection device 900, the disinfection device 900 has a disinfection chamber, and the water circulation pipeline 200 is connected to the disinfection chamber. When water passes through the disinfection chamber, the disinfection device 900 can disinfect the water. It should be noted that the disinfection device 900 can be an ultraviolet disinfection device, and a disinfectant can be input into the disinfection chamber for disinfection, which will not be repeated here.

[0130] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A closed fishery circulation aquaculture system, characterized in that: include: A breeding device, comprising a breeding tank and a feeding assembly, wherein the breeding tank is formed with a breeding cavity, the breeding tank is provided with a first water inlet pipe and a first water outlet pipe, and the feeding assembly is arranged on the breeding tank for feeding into the breeding cavity; A water circulation pipeline, arranged between the first water inlet pipe and the first water outlet pipe; A biochemical device, comprising a biochemical tank body, wherein the biochemical tank body is formed with a biochemical cavity, the biochemical cavity is connected to the water circulation pipeline, and the biochemical cavity is used to accommodate nitrifying bacteria; An oxygen supply device, connected to the culture tank and the biochemical tank, for supplying oxygen to the culture cavity and the biochemical cavity; An air supply device is provided with an air pipe between the air supply device and the breeding tank body, so as to deliver gas into the breeding cavity and adjust the pressure in the breeding cavity.

2. The closed fishery circulation aquaculture system according to claim 1 is characterized in that: The feeding component comprises: A feeding cylinder is arranged at the top of the breeding tank and connected to the breeding cavity. A first valve is arranged at the top of the feeding cylinder, and a second valve is arranged at the bottom of the feeding cylinder. The feeding cylinder forms a storage cavity between the first valve and the second valve. A pressure regulating mechanism is provided on the feeding cylinder to regulate the air pressure in the feeding chamber.

3. The closed fishery circulation aquaculture system according to claim 2 is characterized in that: The pressure regulating mechanism comprises: A first regulating pipe, one end of which is connected to the feeding cylinder and communicated with the storage chamber, and the other end is used to communicate with the atmosphere, and the first regulating pipe is provided with a third valve; A second regulating pipe, one end of which is connected to the feeding tube and communicated with the storage cavity, and the other end is connected to the breeding tank and communicated with the breeding cavity, and the second regulating pipe is provided with a fourth valve.

4. The closed fishery circulation aquaculture system according to any one of claims 1 to 3, characterized in that: The first water outlet pipe is arranged in the middle of the bottom end of the breeding tank body, and two first water inlet pipes are arranged. The two first water inlet pipes are respectively connected to the two ends of the breeding tank body in the length direction, and along the projection of the length direction of the breeding tank body, the connection positions of the two first water inlet pipes and the breeding tank body are respectively located on the opposite sides of the breeding tank body. When the two first water inlet pipes supply water at the same time, the water in the breeding cavity forms a vortex under the impetus of the water discharged from the two first water inlet pipes.

5. The closed fishery circulation aquaculture system according to claim 4 is characterized in that: The two ends of the breeding tank body in the length direction are respectively connected to the first water supply pipe, and the first water inlet pipe and the first water supply pipe at the same end of the breeding tank body are respectively located on opposite sides of the breeding tank body. When the two first water supply pipes supply water at the same time, the water in the breeding cavity forms a vortex under the impetus of the water discharged from the two first water supply pipes.

6. The closed fishery circulation aquaculture system according to any one of claims 1 to 3, characterized in that: The breeding device further comprises a first liquid level meter component, wherein the first liquid level meter component comprises: Liquid level meter body; A first connecting pipe is connected to the top of the liquid level meter body, one end of the first connecting pipe is connected to the breeding tank and communicates with the breeding cavity, and the gas transmission pipe is connected to the first connecting pipe; The second connecting pipe is connected to the bottom end of the liquid level meter body, and the second connecting pipe is connected to the breeding tank and communicates with the breeding cavity.

7. The closed fishery circulation aquaculture system according to any one of claims 1 to 3, characterized in that: The biochemical tank body is provided with a second water inlet pipe and a second water outlet pipe connected to the water circulation pipeline, and the biochemical device further comprises a plurality of attachment structures, which are movably accommodated in the biochemical cavity, and the attachment structures are used for nitrifying bacteria to attach; wherein, The second water inlet pipe is connected to the bottom end of the biochemical tank, and the water outlet direction of the second water inlet pipe is upward, so that the water discharged from the second water inlet pipe can push at least part of the attachment structure to move upward; or, Two second water inlet pipes are provided and are respectively connected to the two ends of the biochemical tank body in the length direction. Along the projection of the length direction of the biochemical tank body, the connection positions of the two second water inlet pipes and the biochemical tank body are respectively located on the opposite sides of the biochemical tank body. When the two second water inlet pipes supply water at the same time, the water in the biochemical tank body forms a vortex under the impetus of the water discharged from the two second water inlet pipes, so as to drive at least part of the attachment structure to move.

8. The closed fishery circulation aquaculture system according to any one of claims 1 to 3, characterized in that: Also included is a filtering device, the filtering device comprising: The shell has a water inlet cavity and a water purification cavity formed therein, the water inlet cavity is provided with a water inlet, the water purification cavity is provided with a water outlet, and the water inlet and the water outlet are connected to the water circulation pipeline; A filter cartridge is disposed in the water purification chamber, and one end of the filter cartridge is opened and connected to the water inlet chamber; A water outlet assembly, comprising a movable part, a sliding part, a sewage pipe and an elastic member, wherein the movable part is movably arranged on the housing, the sliding part is slidably connected to the movable part, the sewage pipe is connected to the sliding part, and the elastic member is arranged between the movable part and the sliding part; The movable part can be moved to connect or separate the sewage pipe from the filter cartridge, and when the sewage pipe is connected to the filter cartridge, the elastic force of the elastic member enables the sliding part to have a sliding tendency to drive the sewage pipe to approach the filter cartridge.

9. The closed fishery circulation aquaculture system according to claim 8, characterized in that: The movable part is rotatably arranged on the shell, and the rotation axis of the movable part is parallel to the length direction of the filter cartridge. The filter cartridge includes at least two groups, each group of the filter cartridge includes a plurality of filter cartridges arranged circumferentially along the rotation axis, and the distances between the filter cartridges in different groups and the rotation axis are different. The sewage pipe is provided with a water inlet end corresponding to each group of the filter cartridges, and the movable part can be rotated to make the water inlet end communicate with a corresponding group of multiple filter cartridges in sequence.

10. The closed fishery circulation aquaculture system according to any one of claims 1 to 3, characterized in that: The oxygen supply device is configured as an oxygen generator, and the closed fishery circulation aquaculture system further comprises: A heat exchange pipeline, used for conveying a heat exchange medium, the heat exchange pipeline having a first section and a second section, the first section being connected to the oxygen generator, and the second section being connected to the biochemical tank and / or the water circulation pipeline; Wherein, the heat exchange medium can absorb the heat generated by the oxygen generator when passing through the first section, and can exchange heat with the water in the biochemical tank and / or the water circulation pipeline when passing through the second section.

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