A seawater crab farming device for reducing the incidence of diseases

Abstract

The present invention discloses a seawater crab breeding device for reducing the incidence of diseases, which includes a breeding pond. A water outlet pipe is provided at the bottom of the breeding pond, and the water outlet pipe is connected to an external circulation pipeline. A wastewater treatment component is configured on the external circulation pipeline; a medicine feeding component is configured in the breeding pond, including a connected medicine feeding matrix and a dissolution tube body; a water inlet is provided at the bottom of the dissolution tube body; a water outlet is provided in the middle and upper section of the dissolution tube body; a drainage cylinder is coaxially sleeved outside the dissolution tube body, the water outlet is located inside the drainage cylinder, the bottom of the drainage cylinder is connected to the bottom of the dissolution tube body, and drainage holes are provided on the side wall of the drainage cylinder; a floating body is further provided at the bottom of the medicine feeding matrix. By using the seawater crab breeding device of the present invention, precise medicine feeding can be achieved, the water quality of the breeding water can be improved, and the survival rate of seawater crab breeding can be greatly increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of aquaculture, and particularly relates to a seawater crab breeding device for reducing the incidence of diseases. Background Art

[0002] Seawater crabs are important seawater aquaculture varieties in China, mainly including two varieties: green crabs and swimming crabs, with a total national breeding area of more than 600,000 mu. In recent years, the breeding diseases of seawater crabs have occurred frequently, posing a severe challenge to the industry. Controlling water quality and accurately applying drugs are important means for preventing and controlling the occurrence of seawater crab diseases.

[0003] The PCT application with the publication number WO2017133842A1 discloses a method for treating circulating water in a circulating system, especially suitable for an aquaculture circulating system. At least a part of the circulating water passes through at least one bypass and is prepared by ultrafiltration and / or microfiltration at least once in the bypass. Among them, the flow rate of the diverted water needs to be regulated according to one or more characteristics of the water quality of the circulating water parameters. By using this method, energy optimization operations can be carried out while improving water quality.

[0004] The invention patent with the publication number US09756838B2 discloses a circulating aquaculture method and a circulating aquaculture device. The device has a circulating aquaculture tank for raising aquatic organisms and a treatment unit for treating the aquaculture water pumped out from the aquaculture tank with ozone or hypochlorous acid and then returning it to the aquaculture tank. The treatment unit has: a control unit that sets the decomposition rate of ammonia and the target ammonia residual amount after decomposition treatment and calculates the treatment time required for treating the ammonia amount in the aquaculture water; and a decomposition treatment unit that decomposes the ammonia in the aquaculture water by treating the aquaculture water with ozone or hypochlorous acid. By using the method and the aquaculture device of the present invention, the generation of toxic oxidants and bromic acid can be prevented, and at the same time, the ammonia harmful to fish and shellfish can be effectively removed. According to the change of the ammonia discharge amount from fish and shellfish due to conditions such as after feeding and at night and time, appropriate ammonia removal treatment is implemented, so that the accumulation of ammonia in the aquaculture water can be effectively prevented, and the effect of reducing the incidence of diseases can be achieved.

[0005] It can be seen that some of the existing aquaculture devices are not equipped with a drug delivery device, and some of the equipped drug delivery devices are not accurate enough in administering drugs during the breeding process of seawater crabs with a benthic life habit, which is likely to cause drug residues and increase costs. Summary of the Invention

[0006] The purpose of the present invention is to provide a seawater crab breeding device for reducing the incidence of diseases, which can achieve accurate drug administration, improve the water quality of breeding water, and greatly improve the survival rate of seawater crabs.

[0007] The technical solution adopted by the present invention to achieve the above purpose is as follows:

[0008] A seawater crab farming device for reducing the incidence of diseases, comprising at least one farming pond. A water outlet pipe is provided at the bottom of the farming pond, and the water outlet pipe is connected to an external circulation pipeline. A wastewater treatment component is arranged on the external circulation pipeline for filtering and sterilizing the farming water.

[0009] A medicine feeding component is also arranged in the farming pond. The medicine feeding component includes a funnel-shaped medicine feeding base body and a cylindrical dissolution tube body. The top of the dissolution tube body is communicated with the bottom opening of the medicine feeding base body. An inlet is provided at the bottom of the dissolution tube body. An outlet is provided in the middle and upper section of the dissolution tube body. A drainage cylinder is coaxially sleeved outside the dissolution tube body, and there is a gap between them. The outlet is located inside the drainage cylinder. The bottom of the drainage cylinder is connected to the bottom of the dissolution tube body. Drainage holes are provided on the side wall of the drainage cylinder. A floating body is also provided at the bottom of the medicine feeding base body, and the floating body is connected with a motorized propeller.

[0010] The medicine feeding component is also provided with a vertically arranged first air blowing pipe, which is sleeved inside the dissolution tube body, and the exhaust end of the first air blowing pipe is located in the middle and lower section of the dissolution tube body. The first air blowing pipe cooperates with a blower to be able to convey air flow into the dissolution tube body.

[0011] In some embodiments, the dissolution tube body and the medicine feeding base body are integrally formed and are in the shape of a long-necked funnel.

[0012] Adopting the above technical solution, the farming water body realizes water quality improvement through the external circulation pipeline. Through the wastewater treatment component, possible feed residues, seawater crab excrements and other impurities in the water body can be removed, and harmful gases such as ammonia nitrogen, carbon dioxide, and sulfide that may be contained in the water body can be removed. After oxygenation treatment, the farming conditions can be kept in the optimal state, preventing the growth of harmful microorganisms, thereby preventing the occurrence of diseases and improving the survival rate of seawater crabs.

[0013] By using the setting of the dosing component, different drugs can be put into the breeding pond in a targeted manner during the breeding process to prevent the occurrence of diseases, or inorganic salts can be put in to maintain the salinity of the breeding water. For benthic marine crabs, the dosing component is used to deliver drugs, which can achieve precise drug delivery. The water enters from the open end at the bottom of the dissolving tube body, and the drug enters the dissolving tube body through the dosing matrix, mixes and dissolves with the breeding water, and then enters the drainage tube through the water outlet, and diffuses into the breeding pond through the drainage hole. The cooperation of the first blast pipe allows the drug to contact with the rising airflow during the downward sedimentation along the dissolving tube body, thereby accelerating the dispersion of the drug. Especially for the agglomerated drug, the rising airflow can break it up, make it fully mixed with water, accelerate the dissolution of the drug, and then improve the utilization rate of the drug and ensure the efficacy. The airflow output in the first blast pipe can form disturbances inside the dissolving tube body, increase the energy of the water body, help the water body swirl, further increase the dissolution rate of the drug, and can help accelerate the water body to enter the drainage tube through the water outlet, and then be discharged into the breeding pond.

[0014] In addition, the airflow output by the first blower tube can cause disturbance in the water body, thereby prompting the dissolving tube body to drive the drug-dosing matrix to vibrate to a certain extent, which helps the drug to slide down along the inner wall of the drug-dosing matrix, reduce drug residues, and save costs.

[0015] Providing the first blast pipe can increase the rate at which gas dissolves in water during the process of airflow contacting the water body, increase the dissolved oxygen content of the water body, help improve water quality, prevent the growth of harmful microorganisms, and reduce the ammonia nitrogen content in the water body.

[0016] Since the dosing matrix is funnel-shaped, the dissolving tube is connected to the bottom of the extension section of the dosing matrix, so that the dissolved medicine can be directly discharged to the bottom of the breeding pond through the drainage hole on the drainage tube, and accurate dosing can be achieved for benthic marine crabs. The float and motorized propeller configured on the dosing matrix can realize the dosing component to operate in the breeding pond. Multiple dosing components are used in combination, and the paths of each dosing component are planned, so that the drug delivery to the entire breeding pond can be achieved in a short time.

[0017] After the drug is mixed and dissolved with the water, it is discharged through the drainage tube and diffused into the breeding pond; during the process of the dosing matrix moving around, the drug gradually diffuses to different areas in the breeding pond, thereby achieving full mixing of the drug with the water in the breeding pond. During the whole process, there is no jet impact of high-speed water flow, and the water disturbance caused is weak, which can reduce the impact on the marine crabs living at the bottom of the breeding pond.

[0018] According to an embodiment of the present invention, a sieve plate is arranged on the bottom extension section of the medicine delivery matrix, and sieve holes are arranged on the sieve plate; the sieve plate is provided with a radially extending fixing rod, and both ends of the fixing rod are connected to the side wall of the medicine delivery matrix. A clamping groove is arranged on the inner wall of the bottom extension section of the medicine delivery matrix, and the edge of the sieve plate is movably matched with the clamping groove.

[0019] Thus, the medicine to be delivered, especially the powdery solid medicine, can be sieved by the sieve plate before entering the dissolution tube body. The fine powder can directly enter the dissolution tube body through the sieve holes, expanding the contact area between the medicine and the water body and helping to accelerate dissolution. However, the medicine with larger particles or caked will be intercepted by the sieve holes. Also, because the sieve plate is movably connected to the medicine delivery matrix through a radial fixing rod, and the width of the annular clamping groove arranged on the inner wall of the bottom extension section of the medicine delivery matrix is larger than the thickness of the sieve plate. After the medicine contacts the sieve plate, the sieve plate will turn within a certain space, causing the large-particle or caked medicine to roll back and forth on the upper surface of the sieve plate, which helps to further crush the medicine. After the particle size is reduced, it enters the dissolution tube body through the sieve holes. The sieve plate turns within a certain space range (i.e., within the clamping groove), which not only helps to shake off the medicine on it but also causes the vibration of the medicine delivery matrix, thereby preventing the medicine from adhering to the inner wall of the medicine delivery matrix and reducing the medicine residue.

[0020] For some large-particle medicines that are difficult to crush, several sieve holes with larger diameters can be arranged at the edge of the sieve plate to prevent the medicine from remaining on the sieve plate due to too large particle size.

[0021] According to an embodiment of the present invention, the bottom of the aquaculture pond is of a funnel-shaped structure, and a descaling component is arranged at the bottom of the aquaculture pond. The descaling component includes a spiral slide rail, a scraper, and a jet spray head; the slide rail is arranged in contact with the bottom surface of the aquaculture pond, and the scraper and the jet spray head are movably connected to the slide rail through sliders. One edge of the scraper contacts the bottom surface of the aquaculture pond, and the jet spray head is arranged facing the bottom surface of the aquaculture pond.

[0022] Thus, the bottom of the aquaculture pond can be cleaned through the descaling component, effectively preventing the adhesion of residual bait, crab excrement, etc. to the bottom of the aquaculture pond, helping to improve the cleanliness of the aquaculture water, and preventing the growth of microorganisms.

[0023] Specifically, during the process of the scraper moving back and forth along the spiral slide rail, it contacts the bottom of the aquaculture pond, thus helping to remove the scale and other substances deposited at the bottom of the aquaculture pond, preventing impurities from depositing at the bottom of the aquaculture pond, thereby improving the aquaculture environment at the bottom of the aquaculture pond, reducing the production of ammonia nitrogen, and ensuring the oxygen content in the water during the cultivation of seawater crabs.

[0024] The jet nozzles are arranged to inject high-speed water flows at the bottom of the aquaculture pond, which helps to promote the mixing of the bottom water body and improve the balance degree. The jet nozzles cooperate with the scraper. The scraper scrapes the bottom of the aquaculture pond, and the jet nozzles impact the bottom of the aquaculture pond, which can effectively prevent the adhesion of mud scale, clean the silt, and can break up the caked mud scale, preventing the blockage of the pipeline during the circulation of the aquaculture water body.

[0025] Especially for aquaculture ponds with fine sand laid at the bottom, the scraper in the descaling component can turn over the fine sand and promote the friction between sand grains, helping the impurities adhering to it to fall off. The turning effect of the scraper also helps to break up the fine sand, prevent caking, improve the looseness of the bottom fine sand, and help to increase the oxygen content at the bottom of the aquaculture pond. Combined with the jet nozzles, the impact of high-speed water flows can also improve the effect of breaking up the caked fine sand. In addition, the high-speed water flows provided by the jet nozzles can also carry some sand grains and mud scale to flow, thereby improving the balance degree of the water body at the bottom of the aquaculture pond, and can also increase the water body energy by causing the disturbance of the bottom water body, helping to slow down the breeding speed of anaerobic microorganisms at the bottom of the aquaculture pond, and further reducing the incidence of diseases.

[0026] In addition, the jet nozzles can spray the water flow from the upper layer of the aquaculture pond to the bottom through the jet pipes, realizing the mixing of the upper water body and the lower water body, which can greatly increase the oxygen content of the bottom water body and help to accelerate the release of harmful gases such as ammonia nitrogen and carbon dioxide contained therein.

[0027] According to an embodiment of the present invention, the wastewater treatment component includes a primary cleaning unit and a secondary cleaning unit arranged in parallel. Thus, the water in the aquaculture pond can be circulated through the primary cleaning unit as needed to perform basic filtration on the water body, and then the water in the aquaculture pond can be circulated through the secondary cleaning unit periodically to perform deep cleaning on the water body.

[0028] Specifically, the primary cleaning unit includes a sedimentation tank. The water inlet end of the sedimentation tank is communicated with the water outlet pipe, and the water outlet end of the sedimentation tank is fluidly connected to the aquaculture pond; a partition plate body is arranged inside the sedimentation tank. The bottom of the partition plate body is connected to the bottom of the sedimentation tank, and a filter screen is arranged above the partition plate body. The partition plate body and the filter screen divide the internal space of the sedimentation tank into a first filtration chamber and a second filtration chamber. The first filtration chamber is communicated with the water inlet end of the sedimentation tank, and the second filtration chamber is communicated with the water outlet end of the sedimentation tank. A first sewage discharge pipe is connected to the bottom of the first filtration chamber, and the first sewage discharge pipe is connected to the sewage discharge component.

[0029] Furthermore, the water inlet communicating with the first filtration chamber is located in the middle and lower section of the partition plate, and the water outlet communicating with the second filtration chamber is located above the partition plate.

[0030] In this way, the sedimentation tank can clean the aquaculture water outside the aquaculture pond, removing the residual feed, crab feces, or other impurities that may be mixed in it, preventing the water body from becoming turbid, and inhibiting the growth of microorganisms. After the water body mixed with various impurities enters the filtration matrix, it first settles inside the first filtration chamber. The impurities with larger particle sizes will settle at the bottom of the first filtration chamber and can be discharged from the external circulation pipeline through the first sewage discharge pipe body, thus destroying the nutritional basis for the large-scale growth of microorganisms. During the process of the water body passing through the filter screen and entering the second filtration chamber, some of the impurities with smaller particle sizes mixed in it are intercepted by the filter screen, which can further improve the cleanliness of the water body. The second filtration chamber provides a resting space for the water body after sedimentation and filtration, achieving the effect of energy dissipation of the water body. The water body discharged from the second filtration chamber not only has a significantly improved cleanliness but also a significantly reduced energy, resulting in a reduced flow rate, which helps the water body to degas and improve the water quality.

[0031] Furthermore, a long fibrous rope body can be connected to the side of the filter screen facing the second filtration chamber to adhere to the fine impurities in the water body, or a filter element can be filled inside the second filtration chamber, which can not only improve the water body filtration effect but also contribute to the energy dissipation of the water body.

[0032] Furthermore, the secondary cleaning unit includes a microfilter, a protein separator, and a biochemical filter connected in sequence; the microfilter is provided with a second sewage discharge pipe, and the biochemical filter cooperates with an aerator; the water inlet end of the microfilter is connected to the water outlet pipe, and the water discharge end of the biochemical filter is fluidly connected to the aquaculture pond; the second sewage discharge pipe is connected to the sewage discharge component. Thus, after the aquaculture water circulates through the primary cleaning unit for a certain period of time, the secondary cleaning unit is used for deep cleaning, which can quickly remove the harmful substances in the water and increase the dissolved oxygen content in the water body, significantly improving the water quality.

[0033] Through the cooperation of the primary cleaning unit and the secondary cleaning unit, it can be ensured that the aquaculture water body is always in a circulating state, preventing the water body from deteriorating. During the conventional circulation process, the primary cleaning unit conducts basic filtration on the aquaculture water to remove the dirt and impurities in it. After a period of conventional circulation, the water body is subjected to deep cleaning through the secondary cleaning unit. In addition to removing impurities, it also removes harmful substances such as ammonia nitrogen, nitrite, nitrate, and harmful microorganisms, and increases the dissolved oxygen content in the water body through the aerator to improve the water quality. The cooperation between the primary cleaning unit and the secondary cleaning unit can reduce the cleaning difficulty of the secondary cleaning unit, and in this way, the changes in various indicators caused by water quality adjustment during the circulation process of the water body can be made relatively gentle, reducing the stress response of the seawater crabs.

[0034] According to an embodiment of the present invention, the sewage discharge component includes a dispersion matrix, and both the first sewage discharge pipe and the second sewage discharge pipe are connected to the inlet end of the dispersion matrix. A stirring shaft and stirring blades are provided inside the dispersion matrix, and the stirring shaft can drive the stirring blades to rotate.

[0035] Thus, the dirt discharged through the first sewage pipe or the second sewage pipe in the wastewater treatment component enters the dispersion matrix. By driving the stirring blades to rotate through the stirring shaft, the dirt can be broken up to prevent large lumps from appearing.

[0036] Furthermore, a separation matrix is movably connected to the outlet end of the dispersion matrix. The outlet end of the dispersion matrix is connected to the inlet end of the separation matrix. The upper section of the separation matrix is provided with a water injection port for injecting water into the interior. The lower section on the side of the separation matrix is provided with a sewage discharge port. A second air duct is provided inside the separation matrix, and the exhaust end of the second air duct is arranged at the bottom of the separation matrix. A sediment discharge port is configured at the bottom of the separation matrix.

[0037] In this way, when laying fine sand in the breeding pond, the fine sand can be collected and cleaned through the sewage discharge component. The fine sand and the dirt in the water body enter the dispersion matrix through the wastewater treatment component, and after being broken up by the stirring blades, they enter the separation matrix. The water injection port is connected to a water inlet pipe, and water can be injected into the interior of the separation matrix. First, a certain amount of water is kept in the separation matrix. In this way, the fine sand and dirt enter the separation matrix and are mixed with the water at the bottom, and during this process, they meet the air flow discharged from the second air duct. Under the blowing of the upward air flow, the dirt with lighter mass is easily separated from the sand grains and suspended in the water, while the sand grains are easily deposited at the bottom of the separation matrix due to their own gravity. Since the fine sand can be turned over by a scraper when inside the breeding pond and is also turned over by the stirring blades after entering the dispersion matrix, rubbing against each other, and also receiving the impact of water flow and air flow, the dirt adhering to its surface is easily separated. In addition, by blowing air into the interior of the separation matrix through the second air duct, it also helps to discharge harmful gases such as ammonia nitrogen and carbon dioxide in the mixture of dirt and water, thereby helping to remove odors and improve the sewage treatment environment.

[0038] In this way, the dirt can be discharged along with the water flow through the sewage drain port provided on the side, while the fine sand can be discharged from the sediment discharge port provided at the bottom, preliminarily cleaning and separating the fine sand, facilitating subsequent recycling and saving costs. If necessary, multiple consecutive separation matrices can be provided to improve the cleaning and separation effect of the fine sand.

[0039] According to an embodiment of the present invention, a degassing component and an oxygenation component are arranged between the sedimentation tank and the breeding pond. Thus, harmful gases such as ammonia and carbon dioxide in the water body can be removed through the degassing component, and then fresh oxygen can be filled into the water body through the oxygenation component to increase the oxygen content.

[0040] Specifically, the degassing component includes at least one degassing monomer with a hollow interior, and the degassing monomer is used in cooperation with an air extraction pump. The bottom of the degassing monomer is provided with a support plate, and the support plate is provided with filter holes.

[0041] Under the action of the air extraction pump, the degassing monomer is in a negative pressure state. In this way, after the water body enters the degassing monomer, the dissolved gases in it, especially harmful gases such as ammonia, carbon dioxide, and hydrogen sulfide, can be released, improving the water quality. After passing through the degassing component, the water body is in an unsaturated state and then enters the oxygenation component, which helps the dissolution of oxygen.

[0042] Furthermore, a heating pipe is provided inside the degassing monomer. By heating through the heating pipe, the degassing rate of the water body can be further increased.

[0043] Furthermore, the inside of the degassing monomer is filled with a degassing medium, and the heating pipe is buried in the degassing medium. The degassing medium is granular, and a tortuous path is formed between the degassing media. The water flow flows through the surface of the degassing medium and is randomly split into thin films, and the thin films drip downward along the path.

[0044] Thus, the water body is split into a thin film state between the degassing media, facilitating the release of the gases therein, and greatly improving the degassing effect. A tortuous path is formed between the degassing media, prolonging the retention time of the water body inside the degassing matrix and lengthening the degassing path. In addition, the setting of the degassing medium helps to filter impurities in the water body.

[0045] According to an embodiment of the present invention, the oxygenation component includes an aeration matrix. An inlet is provided at the top of the aeration matrix, and an outlet is provided on the side of the bottom of the aeration matrix; an aerator is configured at the bottom inside the aeration matrix, the aerator is connected to an aeration pipe, and air outlet holes are provided on the side wall of the aeration pipe.

[0046] Thus, the unsaturated water body after degassing by the degassing component enters the oxygenation component for oxygenation, and the dissolved oxygen content in the water can be quickly increased. The water body entering the oxygenation component flows from top to bottom, and the aeration gas flows from bottom to top. Both the air flow and the water flow are dispersed during the collision process, which helps to form small bubbles, increasing the contact area between the gas and the water flow and improving the oxygen content of the water body.

[0047] Furthermore, vertical support columns are provided inside the aeration matrix. A horizontal filter screen is sleeved on the support columns, and a plurality of movable blades extending radially outward are also provided on the support columns, and the movable blades can rotate around the axis of the support columns.

[0048] Thus, on the one hand, the filter screen can filter impurities in the water body, and on the other hand, it can also divide the water flow and the air flow. The water flow is dispersed, and the larger bubbles in the air flow are divided into smaller bubbles, which helps to accelerate the mixing of water and gas and improve the oxygen dissolution rate. Correspondingly, the air flow can also impact the mesh holes on the filter screen during the upward flow to prevent blockage.

[0049] The movable blades rotate around the support column under the impact of air flow and / or water flow, which helps to form a vortex inside the oxygenation matrix, thereby promoting the contact between gas and water flow. In addition, the rotation of the movable blades forms a vortex, which can prevent the filter screen from being blocked. The rotation of the movable blades will also cause the vibration of the support column, which in turn drives the vibration of the filter screen, also having the effect of preventing blockage.

[0050] According to an embodiment of the present invention, one or more variable-speed pumps are arranged on the external circulation pipeline, and at least one variable-speed pump is connected to the water inlet end of the degassing component. Thus, the flow rate of the water body entering different components can be adjusted according to actual needs.

[0051] According to an embodiment of the present invention, a plurality of sensors are arranged in the aquaculture pond, and the plurality of sensors are used to be connected to a water quality detection system. The parameters of the water quality detection system may include but are not limited to: dissolved oxygen, nitrite, nitrate, ammonia, carbon dioxide, water flow rate, oxygen flow rate, oxygen pressure, solid suspended matter content, temperature, pH, salinity, conductivity, oxidation-reduction potential (ORP) and other water quality parameters known in the art.

[0052] By using the cooperation of the sensors and the water quality detection system, the quality of the water body inside the aquaculture pond is monitored in real time; for example, according to the detection results of the water quality detection system, the waste water component is used to remove impurities and harmful gases in the aquaculture water body; according to the detection results of the water quality detection system, the dosing component is used to put appropriate drugs into the aquaculture pond, so as to prevent the occurrence of diseases or maintain the salinity of the aquaculture water body.

[0053] According to the detection results of the water quality detection system, different solutions are implemented. For example: when the content of solid suspended matter in the water body is too high and the content of dissolved oxygen is too low, the current situation can be improved by adjusting the external circulation pipeline: a filter screen with a smaller mesh size is selected in the filtration component to improve the filtration effect of the water body; in the degassing component, the output power of the air extraction pump is increased, and when there is a heating pipe, the temperature is moderately increased to improve the discharge effect of ammonia gas, etc., and to ensure the oxygenation effect after the water body enters the oxygenation component. When the salinity in the water body is too low, an appropriate amount of seawater crystal or seawater salt can be put into the aquaculture pond through the dosing component for adjustment.

[0054] According to an embodiment of the present invention, the aquaculture pond is provided with a sterilization component, and the sterilization component may optionally include an ultraviolet (UV) disinfection device and / or an ozone generator.

[0055] According to an embodiment of the present invention, a temperature control component is also arranged between the oxygenation component and the aquaculture pond; the temperature control component includes a heat exchange tube, a refrigerant is arranged in the heat exchange tube, and the heat exchange tube cooperates with a compressor. The heat exchange tube can be used to cool the water body and adjust the aquaculture conditions.

[0056] The present invention has the following beneficial effects:

[0057] 1. The use of the drug delivery component can not only achieve precise drug delivery, improve the utilization rate of drugs, ensure the survival rate of seawater crabs, reduce costs, but also increase the oxygen content in the water body;

[0058] 2. The setting of the descaling component realizes the cleaning of the bottom of the breeding pond and prevents the growth of microorganisms; the cooperation between the scraper and the jet nozzle can prevent the adhesion of mud and scale, and also helps to disperse mud and scale or fine sand to prevent the blockage of the external circulation pipeline;

[0059] 3. Through the cooperation of the external circulation pipeline and the wastewater treatment component, the sewage collection and discharge treatment of the water body is realized, the water quality is improved while the energy dissipation of the water body is realized, which is helpful for the degassing and oxygenation of the water body; through the primary cleaning unit and the secondary cleaning unit, the cooperation of two cleaning modes of basic filtration and deep cleaning is realized, which can not only improve the water quality but also achieve energy conservation and environmental protection;

[0060] 4. The primary cleaning unit releases harmful gases such as ammonia, carbon dioxide, and hydrogen sulfide in the breeding water through the setting of the degassing component to improve the water quality; and through the cooperation with the oxygenation component, the oxygen content is increased to provide a suitable breeding environment for seawater crabs; the degassing medium is filled in the degassing component, and the filter screen is set in the oxygenation component to realize the filtration of the breeding water and improve the water body cleanliness;

[0061] 5. In the sewage discharge component, the dispersion matrix and the separation matrix cooperate to realize the cleaning and separation of fine sand, which can not only prevent the growth of microorganisms but also save costs.

[0062] Therefore, the present invention is a seawater crab breeding device that can achieve precise drug delivery, improve the water quality of breeding water, greatly increase the survival rate of seawater crabs, and reduce the incidence of diseases. Description of the Drawings

[0063] Figure 1 It is a schematic diagram of the overall structure of the seawater crab breeding device for reducing the incidence of diseases according to Embodiment 1 of the present invention;

[0064] Figure 2 For Figure 1 The internal structure schematic diagram of the sedimentation tank shown;

[0065] Figure 3 It is a schematic diagram of the structure of the drug delivery component according to Embodiment 1 of the present invention;

[0066] Figure 4 For Figure 3 The partial enlarged schematic diagram of part A in;

[0067] Figure 5 For Figure 3 The partial enlarged schematic diagram of part B in;

[0068] Figure 6Schematic diagram of the overall structure of the seawater crab farming device for reducing the disease incidence rate according to Embodiment 2 of the present invention;

[0069] Figure 7 Schematic diagram of the structure of the degassing component according to Embodiment 2 of the present invention;

[0070] Figure 8 Schematic diagram of the structure of the oxygenation component according to Embodiment 2 of the present invention;

[0071] Figure 9 Schematic diagram of the structure of the culture pond of the seawater crab farming device for reducing the disease incidence rate according to Embodiment 2 of the present invention;

[0072] Figure 10 It is Figure 9 Partial enlarged schematic diagram of part C in

[0073] Figure 11 Schematic diagram of the structure of the dispersion matrix and the separation matrix of the seawater crab farming device for reducing the disease incidence rate according to Embodiment 2 of the present invention.

[0074] Reference numerals in the drawings: culture pond 10; water outlet pipe 11; external circulation pipeline 12; primary cleaning unit 20; sedimentation tank 21; partition plate body 22; filter screen 23; first filtration chamber 24; second filtration chamber 25; first sewage discharge pipe 26; secondary cleaning unit 31; microfilter 32; protein separator 33; biochemical filter 34; second sewage discharge pipe 35; medicine dosing component 40; medicine dosing matrix 41; dissolution pipe body 42; water outlet 43; drainage cylinder 44; drainage hole 45; floating body 51; motorized propeller 52; first air duct 53; screening plate 54; screening holes 55; clamping groove 56; degassing component 60; degassing monomer 61; support plate 62; heating pipe 63; degassing medium 64; oxygenation component 70; aeration matrix 71; aerator 72; aeration pipe 73; support column 74; filter screen 75; movable blade 76; descaling component 80; slide rail 81; scraper 82; jet nozzle 83; sewage discharge component 90; dispersion matrix 91; stirring shaft 92; stirring blade 93; separation matrix 94; water injection port 95; second air duct 96; sewage discharge outlet 97; sediment discharge outlet 98. Detailed implementation manners

[0075] The technical solutions of the present invention will be further described in detail below in conjunction with the specific implementation manners and the drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0076] Embodiment 1

[0077] Figures 1 to 5Schematically shows a seawater crab farming device for reducing the incidence of diseases according to an embodiment of the present invention, which can be used for the farming of mud crabs or swimming crabs. In this embodiment, the farming of swimming crabs is taken as an example. As shown in the figure, the device includes three farming ponds 10, and a plurality of sensors are arranged in the farming ponds 10. The plurality of sensors are used to be connected to a water quality detection system. The parameters of the water quality detection system may include but are not limited to: dissolved oxygen, nitrite, nitrate, ammonia, carbon dioxide, water flow rate, oxygen flow rate, oxygen pressure, solid suspended matter content, temperature, pH, salinity, conductivity, oxidation-reduction potential (ORP), and other water quality parameters known in the art.

[0078] The bottom of the farming pond 10 is connected to an external circulation pipeline 12 through a water outlet pipe 11. A wastewater treatment assembly is arranged on the external circulation pipeline 12, including a primary cleaning unit 20 and a secondary cleaning unit 31 arranged in parallel.

[0079] Specifically, the primary cleaning unit 20 includes a sedimentation tank 21. The water inlet end of the sedimentation tank 21 is communicated with the water outlet pipe 11, and the water outlet end of the sedimentation tank 21 is fluidly connected to the farming pond 10. A partition plate body 22 is arranged inside the sedimentation tank 21. The bottom of the partition plate body 22 is connected to the bottom of the sedimentation tank 21. A filter screen 23 is arranged above the partition plate body 22. The partition plate body 22 and the filter screen 23 divide the internal space of the sedimentation tank 21 into a first filtration chamber 24 and a second filtration chamber 25. The first filtration chamber 24 is communicated with the water inlet end of the sedimentation tank 21, and the second filtration chamber 25 is communicated with the water outlet end of the sedimentation tank 21. The water inlet connected to the first filtration chamber 24 is located in the middle and lower section of the partition plate, and the water outlet connected to the second filtration chamber 25 is located above the partition plate. A first sewage discharge pipe 26 is connected to the bottom of the first filtration chamber 24, and the first sewage discharge pipe 26 is connected to a sewage discharge assembly 90.

[0080] In this way, after the water body mixed with various impurities enters the filtration matrix, it first settles inside the first filtration chamber 24. Among them, impurities with larger particle sizes will be deposited at the bottom of the first filtration chamber 24 and can be discharged from the external circulation pipeline 12 through the first sewage discharge pipe 26. During the process of the water body passing through the filter screen 23 and entering the second filtration chamber 25, some of the impurities with smaller particle sizes mixed in it are intercepted by the filter screen 23, which can further improve the cleanliness of the water body. The second filtration chamber 25 provides a resting space for the water body after sedimentation and filtration, achieving the effect of water body energy dissipation.

[0081] In other embodiments, a long fibrous rope body can also be connected to the side of the filter screen 23 facing the second filtration chamber 25 for adhering to fine impurities in the water body, or a filter element can be filled inside the second filtration chamber 25, which can not only improve the water body filtration effect but also contribute to water body energy dissipation.

[0082] The secondary cleaning unit 31 includes a microfilter 32, a protein separator 33, and a biochemical filter 34 that are connected in sequence; the microfilter 32 is provided with a second sewage discharge pipe 35, and the biochemical filter 34 cooperates with an aerator; the water inlet end of the microfilter 32 is communicated with the water outlet pipe 11, and the drainage end of the biochemical filter 34 is fluidly connected to the culture pond 10; the second sewage discharge pipe 35 is connected to the sewage discharge assembly 90. Thus, after the aquaculture water circulates through the primary cleaning unit 20 for a certain period of time, the secondary cleaning unit 31 is used for deep cleaning, which can quickly remove harmful substances in the water and increase the oxygen content of the water body, significantly improving the water quality.

[0083] A medicine feeding assembly 40 is further arranged in the culture pond 10. The medicine feeding assembly 40 includes a funnel-shaped medicine feeding base body 41 and a cylindrical dissolution tube body 42; the top of the dissolution tube body 42 is communicated with the bottom opening of the medicine feeding base body 41, and the bottom of the dissolution tube body 42 is provided with a water inlet; a water outlet 43 is arranged in the middle and upper section of the dissolution tube body 42; a drainage cylinder 44 is coaxially sleeved outside the dissolution tube body 42, and there is a gap between the two. The water outlet 43 is located inside the drainage cylinder 44, the bottom of the drainage cylinder 44 is connected to the bottom of the dissolution tube body 42, and drainage holes 45 are arranged on the side wall of the drainage cylinder 44; a floating body 51 is further arranged at the bottom of the medicine feeding base body 41, and the floating body 51 is connected with a motor-driven propeller 52 for driving the medicine feeding assembly 40 to move around in the culture pond 10.

[0084] The medicine feeding assembly 40 is further provided with a vertically arranged first air blowing pipe 53. The first air blowing pipe 53 is sleeved inside the dissolution tube body 42, and the exhaust end of the first air blowing pipe 53 is located in the middle and lower section of the dissolution tube body 42. The first air blowing pipe 53 cooperates with a blower and can convey air flow into the dissolution tube body 42.

[0085] Furthermore, a sieve plate 54 is arranged at the bottom extension of the medicine feeding base body 41, and sieve holes 55 are arranged on the sieve plate 54; the sieve plate 54 is provided with a radially extending fixing rod (not marked in the figure), the two ends of the fixing rod are connected to the side wall of the medicine feeding base body 41, and a clamping groove 56 is arranged on the inner wall of the bottom extension of the medicine feeding base body 41, and the edge of the sieve plate 54 is movably matched with the clamping groove 56.

[0086] With the arrangement of the medicine feeding assembly 40, different medicines can be targeted to be put into the culture pond 10 during the aquaculture process to prevent diseases, or inorganic salts can be put in to maintain the salinity of the aquaculture water body. For benthic swimming crabs, the medicine feeding assembly 40 is used for medicine feeding, which can achieve precise drug delivery. Water enters from the open end at the bottom of the dissolution tube body 42, the medicine enters the dissolution tube body 42 through the medicine feeding base body 41, is mixed and dissolved with the aquaculture water, then enters the inside of the drainage cylinder 44 through the water outlet 43, and diffuses into the culture pond 10 through the drainage holes 45.

[0087] The drugs to be delivered, especially powdery solid drugs, can be screened by the screening plate 54 before entering between the dissolution tubes 42. Fine powder particles can directly enter the dissolution tubes 42 through the screening holes 55, expanding the contact area between the drugs and the water body and helping to accelerate dissolution. Larger or agglomerated drugs will be intercepted by the screening holes 55. Also, since the screening plate 54 is movably connected to the drug delivery base 41 through a radial fixing rod, and the width of the annular card slot 56 provided on the inner wall of the bottom extension of the drug delivery base 41 is greater than the thickness of the screening plate 54, after the drugs come into contact with the screening plate 54, the screening plate 54 will turn within a certain space, causing the larger or agglomerated drugs to roll back and forth on the upper surface of the screening plate 54, which helps to further crush the drugs. After the particle size is reduced, they enter the dissolution tubes 42 through the screening holes 55. The screening plate 54 turning within a certain space range not only helps to shake off the drugs on it but also causes the vibration of the drug delivery base 41, thereby preventing the drugs from adhering to the inner wall of the drug delivery base 41 and reducing drug residue.

[0088] The cooperation of the first air duct 53 enables the drugs to come into contact with the rising air flow during the process of settling downward along the dissolution tubes 42, thereby accelerating the dispersion of the drugs. Especially for agglomerated drugs, the rising air flow can break them up, enabling them to be fully mixed with water, accelerating the dissolution of the drugs, and thus improving the drug utilization rate and ensuring the drug efficacy. The air flow output from the first air duct 53 can form a disturbance inside the dissolution tubes 42, increasing the energy of the water body, helping the water body to swirl, further increasing the dissolution rate of the drugs, and helping to accelerate the water body to enter the drainage cylinder 44 through the water outlet 43 and then be discharged into the aquaculture pond 10.

[0089] In addition, the air flow output from the first air duct 53 can cause the disturbance of the water body, thereby prompting the dissolution tubes 42 to drive the drug delivery base 41 to vibrate to a certain extent, helping the drugs to slide downward along the inner wall of the drug delivery base 41, reducing drug residue, and saving costs. Blowing air into the aquaculture pond 10 through the first air duct 53 also helps to increase the oxygen content of the water body.

[0090] Thus, the aquaculture water body realizes water quality improvement through the external circulation pipeline 12. The possible feed residues, excreta of swimming crabs, and other impurities in the water body can be removed through the wastewater treatment component, and the harmful gases such as ammonia nitrogen, carbon dioxide, and sulfide that may be contained in the water body can be removed. After oxygenation treatment, the aquaculture conditions can be maintained in the optimal state, preventing the growth of harmful microorganisms, thereby preventing the occurrence of diseases and increasing the survival rate of swimming crabs. Precise drug delivery can be achieved through the drug delivery component 40, which helps to improve the drug efficacy and save costs.

[0091] Example 2

[0092] Figures 6 to 8Schematically shows a seawater crab farming device for reducing the disease incidence rate according to another embodiment of the present invention. The difference from Example 1 is that:

[0093] In the primary cleaning unit 20, a degassing component 60 and an oxygenation component 70 are arranged between the sedimentation tank 21 and the degassing component 60 and the oxygenation component 70 of the farming pond 10.

[0094] Specifically, the degassing component 60 includes at least one degassing monomer 61 with a hollow interior. The degassing monomer 61 is used in cooperation with an air extraction pump. A support plate 62 is provided at the bottom of the degassing monomer 61, and the support plate 62 is provided with filter holes (not marked in the figure). A heating pipe 63 is arranged inside the degassing monomer 61. By heating through the heating pipe 63, the degassing rate of the water body can be further improved.

[0095] Under the action of the air extraction pump, the degassing monomer 61 is in a negative pressure state. Thus, after the water body enters the degassing monomer 61, the dissolved gases therein, especially harmful gases such as ammonia, carbon dioxide, and hydrogen sulfide, can be released, improving the water quality. After the water body passes through the degassing component 60, it is in an unsaturated state and then enters the oxygenation component 70, which helps the dissolution of oxygen.

[0096] The interior of the degassing monomer 61 is filled with a degassing medium 64, and the heating pipe 63 is buried in the degassing medium 64. The degassing medium 64 is granular, and a tortuous path is formed between the degassing media 64. The water flow flows through the surface of the degassing medium 64 and is randomly split into thin films, and the thin films drip downward along the path, as Figure 7 shown by the arrow direction in the figure. The water body is split into a thin film state between the degassing media 64, facilitating the release of the gases therein, and greatly improving the degassing effect. A tortuous path is formed between the degassing media 64, extending the retention time of the water body inside the degassing matrix and lengthening the degassing path. In addition, the setting of the degassing medium 64 helps to filter impurities in the water body.

[0097] The oxygenation component 70 includes an aeration matrix 71. An inlet is provided at the top of the aeration matrix 71, and an outlet is provided on the side of the bottom of the aeration matrix 71; an aerator 72 is arranged at the bottom inside the aeration matrix 71. The aerator 72 is connected to an aeration pipe 73, and air outlet holes are provided on the side wall of the aeration pipe 73. A vertically arranged support column 74 is arranged inside the aeration matrix 71, and a horizontal filter screen 75 is sleeved on the support column 74. A plurality of movable blades 76 extending radially outward are also provided on the support column 74, and the movable blades 76 can rotate around the axis of the support column 74.

[0098] On the one hand, the filter screen 75 can filter impurities in the water body, and on the other hand, it can also divide the water flow and the air flow. The water flow is dispersed, and the larger bubbles in the air flow are divided into smaller bubbles, which helps to improve the oxygen dissolution rate. Correspondingly, the air flow can also impact the mesh holes on the filter screen 75 during the upward flow process to prevent blockage.

[0099] The movable blade 76 rotates around the support column 74 under the impact of air flow and / or water flow, which helps to form a swirling flow inside the oxygenation matrix, thereby promoting the contact between gas and water flow. In addition, the swirling flow formed by the rotation of the movable blade 76 can prevent the filter screen 75 from being blocked. The rotation of the movable blade 76 will also cause the vibration of the support column 74, which in turn drives the vibration of the filter screen 75, also having the effect of preventing blockage.

[0100] One or more variable-speed pumps (not shown in the figure) are arranged on the external circulation pipeline 12, and at least one variable-speed pump is connected to the water inlet end of the degassing assembly 60. Thus, the flow rate of water entering different components can be adjusted according to actual needs.

[0101] Embodiment 3

[0102] Figures 9 to 11 Schematically shows a seawater crab breeding device for reducing the disease incidence rate according to another embodiment of the present invention. The difference from Embodiment 1 is as follows:

[0103] The bottom of the breeding pond 10 is of a funnel-shaped structure, paved with fine sand, and is equipped with a descaling assembly 80. The descaling assembly 80 includes a spiral slide rail 81, a scraper 82 and a jet nozzle 83; the slide rail 81 is arranged in contact with the bottom surface of the breeding pond 10, and the scraper 82 and the jet nozzle 83 are movably connected to the slide rail 81 through sliders. The scraper 82 and the jet nozzle 83 can be fixed to the sliders by welding or bolting, and one edge of the scraper 82 is in contact with the bottom surface of the breeding pond 10, and the jet nozzle 83 is arranged facing the bottom surface of the breeding pond 10.

[0104] The scraper 82 in the descaling assembly 80 can turn over the fine sand and promote the friction between sand grains, which helps the impurities adhering to it to fall off. The turning effect of the scraper 82 also helps to disperse the fine sand, prevent caking, improve the looseness of the bottom fine sand, and help to increase the oxygen content at the bottom of the breeding pond 10. Combined with the jet nozzle 83, the impact of high-speed water flow can also improve the effect of dispersing caked fine sand. In addition, the high-speed water flow provided by the jet nozzle 83 can also carry some sand grains and dirt to flow, thereby providing the balance of the water body at the bottom of the breeding pond 10, and can also increase the water body energy by causing the disturbance of the bottom water body, which helps to slow down the breeding speed of anaerobic microorganisms at the bottom of the breeding pond 10, and thus reduce the disease incidence rate.

[0105] The sewage discharge assembly 90 includes a dispersion matrix 91. The first sewage discharge pipe 26 of the primary cleaning unit 20 and the second sewage discharge pipe 35 of the secondary cleaning unit 31 are both connected to the inlet end of the dispersion matrix 91. A stirring shaft 92 and stirring blades 93 are arranged inside the dispersion matrix 91, and the stirring shaft 92 can drive the stirring blades 93 to rotate.

[0106] The outlet end of the dispersion matrix 91 is movably connected to a separation matrix 94. The outlet end of the dispersion matrix 91 is connected to the inlet end of the separation matrix 94. The upper section of the separation matrix 94 is provided with a water injection port 95 for injecting water into the interior. The lower section on the side of the separation matrix 94 is provided with a sewage discharge port 97. A second air duct 96 is provided inside the separation matrix 94, and the exhaust end of the second air duct 96 is arranged at the bottom of the separation matrix 94. The connection between the second air duct 96 and the side wall of the separation matrix 94 is sealed with a gasket or the like. The bottom of the separation matrix 94 is configured with a sediment discharge port 98.

[0107] The dirt and fine sand discharged through the first sewage pipe 26 or the second sewage pipe 35 in the wastewater treatment component enter the dispersion matrix 91. By driving the stirring blades 93 to rotate through the stirring shaft 92, they can be dispersed to prevent large lumps from appearing.

[0108] The fine sand and the dirt in the water body enter the dispersion matrix 91 through the wastewater treatment component. After being dispersed by the stirring blades 93, they enter the separation matrix 94. The water injection port 95 is connected to a water inlet pipe, and water can be injected into the interior of the separation matrix 94. First, keep a certain amount of water in the separation matrix 94. In this way, the fine sand and dirt enter the separation matrix 94 and mix with the water at the bottom, and meet the air flow discharged from the second air duct 96 during this process. Under the blowing of the upward air flow, the lighter dirt is easily separated from the sand grains and suspended in the water, while the sand grains are easily deposited at the bottom of the separation matrix 94 due to their own gravity. Since the fine sand can be turned over by the scraper 82 when it is inside the breeding pond 10, and is turned over by the stirring blades after entering the dispersion matrix 91, rub against each other, and are also impacted by the water flow and the air flow, the dirt adhering to its surface is easily separated. In addition, by blowing air into the interior of the separation matrix 94 through the second air duct 96, it also helps to discharge harmful gases such as ammonia nitrogen and carbon dioxide in the mixture of dirt and water, thereby helping to remove odors and improve the sewage treatment environment.

[0109] In this way, the dirt can be discharged with the water flow through the sewage drain port provided on the side, while the fine sand can be discharged from the sediment discharge port 98 provided at the bottom, preliminarily cleaning and separating the fine sand, facilitating subsequent recycling and saving costs. If necessary, multiple consecutive separation matrices 94 can be set up to improve the cleaning and separation effect of the fine sand.

[0110] The routine operations in the operation steps of the present invention are well-known to those skilled in the art and will not be elaborated here.

[0111] The above-described embodiments have elaborated on the technical solutions of the present invention. It should be understood that the above are only specific embodiments of the present invention and do not limit the present invention. Any modifications, supplements, or substitutions in a similar manner within the scope of the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A seawater crab farming device for reducing the disease incidence rate, comprising at least one farming pond (10), wherein a water outlet pipe (11) is provided at the bottom of the farming pond (10), and the water outlet pipe (11) is connected to an external circulation pipeline (12); a wastewater treatment component is arranged on the external circulation pipeline (12); It is characterized in that a medicine feeding component (40) is arranged in the farming pond (10), and the medicine feeding component (40) comprises a medicine feeding base body (41) and a dissolution pipe body (42); the top of the dissolution pipe body (42) is communicated with the bottom opening of the medicine feeding base body (41), and a water inlet is provided at the bottom of the dissolution pipe body (42); a water outlet (43) is arranged in the middle upper section of the dissolution pipe body (42); a drainage cylinder (44) is sleeved outside the dissolution pipe body (42), and a gap is arranged between the two, the water outlet (43) is located inside the drainage cylinder (44), the bottom of the drainage cylinder (44) is connected to the bottom of the dissolution pipe body (42), and drainage holes (45) are arranged on the side wall of the drainage cylinder (44); a floating body (51) is further arranged at the bottom of the medicine feeding base body (41); the wastewater treatment component comprises a first-stage cleaning unit (20) and a second-stage cleaning unit (31) arranged in parallel the first-stage cleaning unit (20) comprises a sedimentation tank (21), the water inlet end of the sedimentation tank (21) is communicated with the water outlet pipe (11), and the water outlet end of the sedimentation tank (21) is fluidly connected to the farming pond (10); a partition plate body (22) is arranged inside the sedimentation tank (21), the bottom of the partition plate body (22) is connected to the bottom of the sedimentation tank (21), a filter screen (23) is arranged above the partition plate body (22), and the partition plate body (22) and the filter screen (23) divide the internal space of the sedimentation tank (21) into a first filtration chamber (24) and a second filtration chamber (25), the first filtration chamber (24) is communicated with the water inlet end of the sedimentation tank (21), the second filtration chamber (25) is communicated with the water outlet end of the sedimentation tank (21), and a first sewage discharge pipe (26) is connected to the bottom of the first filtration chamber (24); the second-stage cleaning unit (31) comprises a microfilter (32), a protein separator (33), and a biochemical filter (34) connected in sequence; a second sewage discharge pipe (35) is provided on the microfilter (32), and the biochemical filter (34) cooperates with an aerator; the water inlet end of the microfilter (32) is communicated with the water outlet pipe (11), and the drainage end of the biochemical filter (34) is fluidly connected to the farming pond (10); both the first sewage discharge pipe (26) and the second sewage discharge pipe (35) are connected to a sewage discharge component (90); a degassing component (60) and an oxygenation component (70) are arranged between the sedimentation tank (21) and the farming pond (10); the degassing component (60) comprises at least one degassing monomer (61) with a hollow interior, a support plate (62) is arranged at the bottom of the degassing monomer (61), and the support plate (62) is provided with filter holes; The inside of the degassing monomer (61) is filled with a degassing medium (64). The degassing medium (64) is granular, and a tortuous path is formed between the degassing media (64). Water flows through the surface of the degassing media (64) and drips downward along the path.

2. The seawater crab breeding device for reducing the disease incidence rate according to claim 1, wherein A sieve plate (54) is arranged at the bottom extension of the medicine feeding matrix (41), and sieve holes (55) are arranged on the sieve plate (54); The sieve plate (54) is provided with a radially extending fixing rod. Both ends of the fixing rod are connected to the side wall of the medicine feeding matrix (41). A clamping groove (56) is arranged on the inner wall of the bottom extension of the medicine feeding matrix (41). The edge of the sieve plate (54) is movably matched with the clamping groove (56).

3. The seawater crab breeding device for reducing the disease incidence rate according to claim 1, wherein The bottom of the breeding pond (10) is of a funnel-shaped structure, and a descaling assembly (80) is arranged at the bottom of the breeding pond (10). The descaling assembly (80) includes a spiral slide rail (81), a scraping plate (82) and a jet nozzle (83); The slide rail (81) is arranged in contact with the bottom surface of the breeding pond (10). The scraping plate (82) and the jet nozzle (83) are movably connected to the slide rail (81) through sliders. One edge of the scraping plate (82) is in contact with the bottom of the breeding pond (10). The jet nozzle (83) is arranged facing the bottom surface of the breeding pond (10).

4. The seawater crab breeding device for reducing the disease incidence rate according to claim 1, wherein The sewage discharging assembly (90) includes a dispersion matrix (91). A stirring shaft (92) and stirring blades (93) are arranged inside the dispersion matrix (91). The stirring shaft (92) can drive the stirring blades (93) to rotate; The outlet end of the dispersion matrix (91) is movably connected to a separation matrix (94). A sewage discharge port (97) is arranged at the lower section on the side of the separation matrix (94). A second air duct (96) is arranged inside the separation matrix (94). The exhaust end of the second air duct (96) is arranged at the bottom of the separation matrix (94). A sediment discharge port (98) is arranged at the bottom of the separation matrix (94).

5. The seawater crab breeding device for reducing the disease incidence rate according to claim 1, wherein The oxygenation assembly (70) includes an aeration matrix (71). A water inlet is arranged at the top of the aeration matrix (71), and a water outlet is arranged at the lower side of the bottom of the aeration matrix (71); An aerator (72) is arranged at the bottom inside the aeration matrix (71). The aerator (72) is connected to an aeration pipe (73). Air outlet holes are arranged on the side wall of the aeration pipe (73). Inside the inflatable substrate (71), there is a vertically arranged support column (74). A horizontal filter screen (75) is sleeved on the support column (74). There are also a plurality of movable blades (76) radially extending outward on the support column (74), and the movable blades (76) can rotate around the support column (74).

6. The seawater crab breeding device for reducing the disease incidence rate according to claim 1, wherein The floating body (51) is connected with a motorized propeller (52); the medicine feeding assembly (40) is configured with a vertically arranged first air duct (53). The first air duct (53) is sleeved inside the dissolution tube body (42), and the exhaust end of the first air duct (53) is located in the middle and lower section of the dissolution tube body (42).

7. The seawater crab breeding device for reducing the disease incidence rate according to claim 1, wherein A plurality of sensors are arranged in the breeding pond (10), and the plurality of sensors are connected to a water quality detection system.

8. A method for culturing seawater crabs to reduce the incidence of diseases, characterized in that, Using the seawater crab breeding device as claimed in claim 7, comprising the following steps: S1. By the cooperation of the sensors and the water quality detection system, the quality of the water body inside the breeding pond (10) is monitored in real time; S2. According to the detection result of the water quality detection system, the waste water assembly is used to remove impurities and harmful gases in the breeding water body; S3. According to the detection result of the water quality detection system, the medicine feeding assembly (40) is used to put medicine into the breeding pond (10). The medicine is put into the inside of the medicine feeding substrate (41), so that the medicine enters the inside of the dissolution tube body (42) and dissolves. The dissolved medicine diffuses into the breeding pond (10) through the drain holes (45) on the side wall of the drain cylinder (44), thereby preventing the occurrence of diseases or maintaining the salinity of the breeding water body.

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