A circulating water aquaculture device for white prawn breeding

Abstract

This utility model discloses a recirculating aquaculture system for white shrimp larvae rearing, relating to the field of white shrimp larvae rearing technology. The recirculating aquaculture system for white shrimp larvae rearing includes a rearing pond, an intercepting filter, and a sealing disc. The rearing pond is divided into upper and lower sections. The upper section has a straight hollow cylindrical structure, while the lower section has an inverted conical hollow structure, which reduces dead zones in the water flow and guides the water flow to form a uniform circulation. Simultaneously, the inverted conical lower section uses gravity to guide impurities to the bottom. The intercepting filter is embedded in the middle of the lower section of the rearing pond and is horizontally distributed. The intercepting filter is used to intercept shrimp larvae and allow impurities to pass through, preventing juvenile shrimp from being sucked in and damaged. The sealing disc is located on the top surface of the intercepting filter and can cover and seal the filter, causing impurities to accumulate on the disc rather than on the filter, thus preventing filter clogging.

Description

Technical Field

[0001] This utility model relates to the field of white shrimp seedling technology, and in particular to a recirculating aquaculture device for white shrimp seedling cultivation. Background Technology

[0002] A recirculating aquaculture system for white shrimp larvae is mainly used in the field of aquatic seed breeding, especially for the larval stage of species such as Litopenaeus vannamei. In actual production, white shrimp larvae (usually less than 1 cm in length) are extremely sensitive to water quality fluctuations, and their living environment must meet strict indicators such as dissolved oxygen ≥5 mg / L and ammonia nitrogen ≤0.3 mg / L. The recirculating aquaculture system, through functions such as water filtration, oxygenation, and temperature control, can control the water exchange rate during the larval stage to within 5%, significantly reducing the risk of exogenous pathogen invasion, and has become the mainstream technical solution for large-scale larval breeding. However, existing devices still have key defects in structural design, which restricts the further improvement of larval survival rate.

[0003] Taking the “A Factory-Scale Grafting and Freshwater Aquaculture Pond for Litopenaeus vannamei” disclosed in Chinese Patent CN220441641U as an example, this device adopts a circular pond body with bottom aeration pipes, and achieves uniform freshwater spraying through rotating sprinkler heads, which theoretically can reduce local salinity differences. However, in practical applications, although the bottom surface of the pond body adopts an inclined design (the lowest point connects to the sewage pond), the slope ratio and flow guiding structure of the pond bottom are not clearly defined, resulting in the following problems: First, due to insufficient centrifugal force of water rotation in the edge area of ​​the pond body, sediment retention still exists, especially during the intensive feeding stage of juvenile shrimp, where uneaten feed and feces easily form an accumulation layer near the pond wall; Second, the aeration device is concentrated in the central area of ​​the pond bottom, and the dissolved oxygen concentration in the edge area is 1.2~1.5 mg / L lower than that in the center, which cannot meet the juvenile shrimp's requirement for uniform dissolved oxygen; Third, the water inlet of the pond body adopts a vertical spraying method, and the water flow impact directly acts on the surface of the water body, failing to effectively drive the flow of the bottom water body, resulting in the formation of static dead corners in some parts of the pond bottom.

[0004] Specifically, existing technologies suffer from the following structural defects: First, square or right-angled ponds are prone to creating eddy-up dead zones in the corners, making it difficult for circulating water to flush these areas. This leads to the long-term accumulation of organic matter such as uneaten feed and molting remains of juvenile shrimp, resulting in localized water quality deterioration and bacterial diseases. Second, although some devices use circular ponds, the bottom slope is insufficient or poorly designed, preventing sediment from quickly converging towards the discharge outlet due to gravity. This results in a high-density sediment layer, especially in the central area of ​​the pond, which not only increases the frequency of manual cleaning but may also release toxic substances such as hydrogen sulfide due to anaerobic fermentation of the sediment. These defects directly affect the survival rate of white shrimp larvae, especially in intensive farming scenarios with a larval density exceeding 500 shrimp / L, where the risk of water quality deterioration is significantly amplified. Utility Model Content

[0005] The purpose of this invention is to provide a recirculating aquaculture system for raising white shrimp seedlings, which can solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a recirculating aquaculture device for raising white shrimp seedlings, comprising a culture pond, an intercepting filter, and a sealing disc. The culture pond is divided into upper and lower sections. The upper section of the culture pond has a straight hollow structure, and the lower section has an inverted conical hollow structure, which can reduce dead zones in water flow and guide water flow to form a uniform circulation. At the same time, the inverted conical lower section guides impurities to the bottom by gravity. The intercepting filter is embedded in the middle of the lower section of the culture pond and is horizontally distributed. The intercepting filter is used to intercept shrimp seedlings and allow impurities to pass through, preventing juvenile shrimp from being sucked in and damaged. The sealing disc is located on the top surface of the intercepting filter and can cover and seal the intercepting filter, so that impurities accumulate on the disc rather than on the filter, avoiding filter clogging.

[0007] It also includes an external circulation mechanism and an external filtration mechanism. The external filtration mechanism is located on the outside of the aquaculture pond and connected to the bottom port of the aquaculture pond to help clean impurities and filter the water. The external circulation mechanism is installed on the top of the aquaculture pond and connected to the aquaculture pond and the external filtration mechanism to send the clean water filtered in the external filtration mechanism back into the aquaculture pond to maintain the cleanliness of the water.

[0008] Preferably, the external filtration mechanism includes a circulation pump A, a sludge suction pipe, and a sludge delivery pipe. The sludge suction pipe is connected to the bottom port of the aquaculture pond and communicates with its interior. The circulation pump A is installed at the bottom of the aquaculture pond. The end of the sludge suction pipe away from the aquaculture pond is connected to the input end of the circulation pump A. The output end of the circulation pump A is connected to the sludge delivery pipe. Both the sludge suction pipe and the sludge delivery pipe are equipped with solenoid valves to control their internal opening and closing, so as to facilitate the control of the timing of wastewater extraction and to cooperate with the cleaning of impurities.

[0009] Preferably, the external filtration mechanism further includes an intermediate cylinder and a filter element. An intermediate cylinder is provided on the outside of the aquaculture pond. The intermediate cylinder is a hollow structure with an open top. The end of the sewage delivery pipe away from the circulation pump A is connected to the outer wall of the intermediate cylinder near the bottom and communicates with the inside of the intermediate cylinder. An annular cylindrical filter element is movably fitted inside the intermediate cylinder. The filter element performs deep filtration of wastewater and reduces the organic matter content.

[0010] Preferably, the external circulation mechanism includes a return water pipe, a mounting base, a circulation pump B, and a nozzle. The mounting base is installed at the top end of the aquaculture pond, and the circulation pump B is installed on the top of the mounting base. The output end of the circulation pump B is connected to the return water pipe. The return water pipe is inverted U-shaped and extends to the inner side of the aquaculture pond at the end away from the circulation pump B and is coaxial with the aquaculture pond. The end of the return water pipe away from the circulation pump B is connected to the nozzle, which can evenly send the filtered water back to the aquaculture pond and avoid local water flow impact.

[0011] Preferably, the external circulation mechanism further includes a connecting pipe. The input end of the circulation pump B is connected to the connecting pipe, and the end of the connecting pipe away from the circulation pump B extends into the intermediate cylinder and is coaxially arranged with the intermediate cylinder. A servo hydraulic cylinder with its free end parallel to the axis of the aquaculture pond is installed on the outer wall of the return water pipe. The free end of the servo hydraulic cylinder is perpendicular to the sealing disc and connected to the top of the sealing disc. The servo hydraulic cylinder controls the lifting and lowering of the sealing disc to separate it from the filter screen, which facilitates rinsing of the disc and achieves cleaning without dead corners.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This application adopts a two-end structure with an upper cylindrical and lower conical cylinder, which fundamentally reduces dead zones in water flow compared to existing square or right-angled aquaculture ponds. The cylindrical upper part guides the water flow to form a more uniform circulation, avoiding the formation of eddy dead zones in corners, allowing uneaten feed, feces, and molting remains of juvenile shrimp to flow smoothly with the water flow; the inclined structure of the lower conical cylinder replaces the unreasonable bottom slope design of traditional circular ponds, using gravity to guide impurities to the bottom, effectively solving the problem of sediment stagnation in the center or edge of the pond bottom, and preventing local water quality deterioration caused by impurity accumulation.

[0014] The bottom-mounted filter screen, designed to intercept shrimp larvae while allowing impurities to pass through, combined with the enclosed disc, forms a targeted impurity collection structure. Impurities accumulate on the disc instead of adhering to the filter screen, preventing clogging and ensuring water circulation. This also prevents juvenile shrimp from being sucked into the filter and potentially harmed, solving the problem of existing wastewater systems trapping impurities and potentially harming juvenile shrimp. When cleaning is needed, the disc is raised to separate from the filter screen for rinsing, ensuring thorough removal of accumulated impurities. This eliminates blind spots and avoids the drawbacks of traditional devices where frequent manual cleaning is often insufficient to completely remove sediment, reducing the risk of toxic substances produced by anaerobic fermentation of sediment.

[0015] The externally installed filter cartridge filters and circulates wastewater, further enhancing water purification in conjunction with the aforementioned structure. With impurities collected and cleaned by the disc, the filter cartridge performs deep filtration of the circulating water, reducing the probability of organic matter and bacterial growth. This provides a stable and clean living environment for white shrimp larvae, effectively mitigating the threat to their survival caused by water quality deterioration, especially considering the larvae's weak resilience. Overall, this optimizes the operational performance of the recirculating aquaculture system. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a top perspective view of the present invention;

[0018] Figure 2 This is a bottom-view perspective view of the present invention;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a cross-sectional view (AA) of the present invention.

[0021] Figure reference numerals: 1. Aquaculture pond; 2. Intercepting filter screen; 3. Sealing disc; 4. External circulation mechanism; 41. Return water pipe; 42. Mounting base; 43. Circulation pump B; 44. Connecting pipe; 45. Nozzle; 6. Servo hydraulic cylinder; 7. External filtration mechanism; 71. Circulation pump A; 72. Sewage suction pipe; 73. Sewage delivery pipe; 74. Intermediate cylinder; 75. Filter element. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a recirculating aquaculture system for raising white shrimp larvae, comprising a rearing pond 1, an intercepting filter 2, and a sealing disc 3. The rearing pond 1 is divided into upper and lower sections. The upper section of the rearing pond 1 has a straight hollow structure, and the lower section has an inverted conical hollow structure, effectively eliminating dead zones in water flow and promoting a stable water circulation. At the same time, the inverted conical lower section guides impurities to accumulate at the bottom by gravity. The intercepting filter 2 is embedded in the middle of the lower section of the rearing pond 1 and is horizontally distributed. The intercepting filter 2 is used to intercept shrimp larvae and allow impurities to pass through, preventing the juvenile shrimp from being sucked in and harmed. The sealing disc 3 is located on the top surface of the intercepting filter 2 and can cover the intercepting filter 2. The system is sealed to allow impurities to accumulate on the sealed disc 3 instead of adhering to the intercepting filter 2, thus preventing the intercepting filter 2 from clogging. It also includes an external circulation mechanism 4 and an external filtration mechanism 7. The external filtration mechanism 7 is located on the outside of the aquaculture tank 1 and connected to the bottom port of the aquaculture tank 1. The external filtration mechanism 7 is used to extract and filter the wastewater in the aquaculture tank 1, thus completing the impurity cleaning and water filtration. The external circulation mechanism 4 is installed on the top of the aquaculture tank 1 and connected to the aquaculture tank 1 and the external filtration mechanism 7. The external circulation mechanism 4 is used to return the filtered water in the external filtration mechanism 7 back to the aquaculture tank 1 and return the clean water treated by the external filtration mechanism 7 back to the aquaculture tank 1 to keep the water clean.

[0024] The external filtration mechanism 7 includes a circulation pump A71, a sludge suction pipe 72, and a sludge delivery pipe 73. The sludge suction pipe 72, which communicates with the interior of the aquaculture tank 1, is connected to the bottom port of the aquaculture tank 1. The circulation pump A71 is installed at the bottom of the aquaculture tank 1. The end of the sludge suction pipe 72 away from the aquaculture tank 1 is connected to the input end of the circulation pump A71. The output end of the circulation pump A71 is connected to the sludge delivery pipe 73. Both the sludge suction pipe 72 and the sludge delivery pipe 73 are equipped with solenoid valves to control their internal opening and closing, which facilitates the control of the timing of wastewater extraction and helps to clean impurities. The external filtration mechanism 7 also includes an intermediate cylinder 74 and a filter element 75. An intermediate cylinder 74 is installed on the outside of the aquaculture tank 1. The intermediate cylinder 74 is a hollow structure with an open top. The end of the sludge delivery pipe 73 away from the circulation pump A71 is connected to the outer wall of the intermediate cylinder 74 near the bottom and communicates with the interior of the intermediate cylinder 74. An annular cylindrical filter element 75 is movably fitted inside the intermediate cylinder 74. The filter element 75 deeply filters the wastewater and reduces the organic matter content.

[0025] Secondly, the external circulation mechanism 4 includes a return water pipe 41, a mounting base 42, a circulation pump B43, and a nozzle 45. The mounting base 42 is installed at the top end of the aquaculture tank 1, and the circulation pump B43 is installed on top of the mounting base 42. The output end of the circulation pump B43 is connected to the return water pipe 41. The return water pipe 41 is inverted U-shaped, and its end away from the circulation pump B43 extends to the inside of the aquaculture tank 1 and is coaxially arranged with the aquaculture tank 1. The end of the return water pipe 41 away from the circulation pump B43 is connected to the nozzle 45, which can evenly return the filtered water to the aquaculture tank 1, preventing localized water flow impact. The structure 4 also includes a connecting pipe 44. The input end of the circulation pump B43 is connected to the connecting pipe 44. The end of the connecting pipe 44 away from the circulation pump B43 extends into the intermediate cylinder 74 and is coaxially arranged with the intermediate cylinder 74. A servo hydraulic cylinder 6 with its free end parallel to the axis of the aquaculture pond 1 is installed on the outer wall of the return water pipe 41. The free end of the servo hydraulic cylinder 6 is perpendicular to the sealing disc 3 and is connected to the top of the sealing disc 3 to control the lifting and lowering of the sealing disc 3. The servo hydraulic cylinder 6 drives the sealing disc 3 to lift and lower, so that it is separated from the intercepting filter screen 2, which facilitates rinsing of the sealing disc 3 and achieves cleaning without dead corners.

[0026] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A recirculating aquaculture system for raising white shrimp seedlings, characterized in that, include: The aquaculture pond (1), the intercepting filter (2), and the sealing disc (3) are divided into upper and lower sections. The upper section of the aquaculture pond (1) is a straight hollow structure, and the lower section is an inverted conical hollow structure. The intercepting filter (2) is installed in the middle of the lower section of the aquaculture pond (1) and is horizontally distributed. The intercepting filter (2) is used to intercept shrimp larvae and allow impurities to pass through. The sealing disc (3) is located on the top surface of the intercepting filter (2) and can cover and seal the intercepting filter (2). The external circulation mechanism (4) and the external filtration mechanism (7) are located on the outside of the breeding pond (1) and connected to the bottom port of the breeding pond (1). The external filtration mechanism (7) is used to extract and filter the wastewater in the breeding pond (1). The external circulation mechanism (4) is installed on the top of the breeding pond (1) and connected to the breeding pond (1) and the external filtration mechanism (7). The external circulation mechanism (4) is used to return the filtered water in the external filtration mechanism (7) back to the breeding pond (1).

2. The recirculating aquaculture system for raising white shrimp seedlings according to claim 1, characterized in that: The external filtration mechanism (7) includes a circulation pump A (71), a sludge suction pipe (72), and a sludge delivery pipe (73). The bottom port of the aquaculture pond (1) is connected to the sludge suction pipe (72) which communicates with its interior. The bottom of the aquaculture pond (1) is equipped with a circulation pump A (71). The end of the sludge suction pipe (72) away from the aquaculture pond (1) is connected to the input end of the circulation pump A (71). The output end of the circulation pump A (71) is connected to the sludge delivery pipe (73). Both the sludge suction pipe (72) and the sludge delivery pipe (73) are equipped with solenoid valves that control the opening and closing of their interiors.

3. A recirculating aquaculture system for raising white shrimp seedlings according to claim 2, characterized in that: The external filtration mechanism (7) also includes an intermediate cylinder (74) and a filter element (75). An intermediate cylinder (74) is provided on the outside of the aquaculture pond (1). The intermediate cylinder (74) is a hollow structure with an open top. The end of the sewage pipe (73) away from the circulation pump A (71) is connected to the outer wall of the intermediate cylinder (74) near the bottom and communicates with the inside of the intermediate cylinder (74). An annular cylindrical filter element (75) is movably sleeved inside the intermediate cylinder (74).

4. A recirculating aquaculture system for raising white shrimp seedlings according to claim 3, characterized in that: The external circulation mechanism (4) includes a return water pipe (41), a mounting base (42), a circulation pump B (43), and a nozzle (45). The mounting base (42) is installed at the top end of the aquaculture pond (1). The circulation pump B (43) is installed on the top of the mounting base (42). The output end of the circulation pump B (43) is connected to the return water pipe (41). The return water pipe (41) is U-shaped and its end away from the circulation pump B (43) extends to the inside of the aquaculture pond (1) and is coaxial with the aquaculture pond (1). The end of the return water pipe (41) away from the circulation pump B (43) is connected to the nozzle (45).

5. A recirculating aquaculture system for raising white shrimp seedlings according to claim 4, characterized in that: The external circulation mechanism (4) also includes a connecting pipe (44), the input end of the circulation pump B (43) is connected to the connecting pipe (44), and the end of the connecting pipe (44) away from the circulation pump B (43) extends into the intermediate cylinder (74) and is coaxially arranged with the intermediate cylinder (74).

6. A recirculating aquaculture system for raising white shrimp seedlings according to claim 5, characterized in that: The outer wall of the return water pipe (41) is equipped with a servo hydraulic cylinder (6) whose free end is parallel to the axis of the breeding pond (1). The free end of the servo hydraulic cylinder (6) is perpendicular to the sealing disc (3) and the free end is connected to the top of the sealing disc (3) to control the lifting and lowering of the sealing disc (3).

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