Salmon culture pond with layered oxygenation structure

Abstract

The utility model relates to the technical field of salmon culture, in particular to a salmon culture pond with a layered oxygenation structure, the culture pond is divided into an upper layer area, a middle layer area and a lower layer area through a first partition plate and a second partition plate which are vertically arranged at intervals, the middle-layer area is fixedly connected with an annular oxygenation pipe, the lower-layer area is fixedly connected with an oxygenation disc, and one end of the culture pond is provided with channels corresponding to the upper-layer area, the middle-layer area and the lower-layer area and is fixedly connected with a fish collecting and releasing groove. The culture pond is divided into three culture areas, the upper layer area is provided with the suspension type aeration disc, the middle layer area is provided with the annular oxygenation pipe, and the lower layer area is provided with the oxygenation disc. The problems that due to the fact that the dissolved oxygen diffusion efficiency of a single oxygenation mode is low, the dissolved oxygen in the middle and lower layers is insufficient, the dissolved oxygen fluctuates violently, and the salmon growth rate is reduced are solved in a partitioned oxygenation mode, and partitioned aquaculture can be conducted by combining different growth stages of salmons to adapt to the water depth condition.

Description

Technical Field

[0001] This utility model relates to the field of salmon farming technology, specifically a salmon farming pond with a layered oxygenation structure. Background Technology

[0002] Atlantic salmon is a cold-water migratory fish belonging to the genus *Salmon* in the family Salmonidae of the order Salmoniformes. In China, Atlantic salmon is commonly known as "salmon." Salmon, whether eaten raw or cooked, has a delicious flavor and is characterized by its high protein and low calorie content, while also containing various vitamins and minerals, thus possessing high nutritional value and economic benefits in aquaculture. As a high-value cold-water fish, salmon is a high-oxygen-consuming fish, and its intensive aquaculture has stringent requirements for dissolved oxygen levels in the water. Existing aquaculture ponds commonly use single aeration methods such as surface aerators, bottom aeration discs, or nano-aeration tubes. While traditional surface aerators can quickly increase dissolved oxygen at the surface, the diffusion efficiency of dissolved oxygen at the bottom layer is low due to the thermal stratification effect of the water, resulting in insufficient effective dissolved oxygen supply in the lower layers of the pond. Furthermore, single aeration methods are prone to causing drastic fluctuations in dissolved oxygen (±2 mg / L / hour), inducing stress responses in fish, leading to a 20% decrease in salmon feed intake and consequently, a reduction in growth rate. Therefore, it is necessary to develop a salmon farming pond with a stratified oxygenation structure, taking into account the growth habits of salmon. Utility Model Content

[0003] To address the above technical problems, this utility model provides a salmon farming pond with a layered oxygenation structure, which solves the problems of the single oxygenation method and the impact of drastic fluctuations in dissolved oxygen on the growth rate of salmon in existing salmon farming ponds.

[0004] To solve the above-mentioned technical problems, the present invention provides a salmon farming pond with a layered oxygenation structure, comprising a farming pond, which is divided into an upper layer, a middle layer, and a lower layer by a first partition and a second partition arranged vertically. The upper layer is provided with a suspended aeration disc, the middle layer is fixedly connected with an annular oxygenation pipe, and the lower layer is fixedly connected with an oxygenation disc. The annular oxygenation pipe and the oxygenation disc are respectively connected to the output end of an oxygenation pump through an oxygen supply pipe. The first partition and the second partition are perforated plates. One end of the farming pond has a channel corresponding to the upper, middle, and lower layers, and a fish receiving and releasing trough is fixedly connected thereto. The upper, middle, and lower layers are each slidably connected to a grid baffle by a moving mechanism. A sewage pipe is fixedly connected to the bottom of the farming pond, and a valve is fixedly connected to the sewage pipe.

[0005] Furthermore, the lower end of the sewage pipe is fixedly connected to the upper end of the filter tank via a feeding pipe, and a sewage pump is fixedly connected to the feeding pipe. A filter plate is detachably connected to the middle of the filter tank. The lower end of one side of the filter tank is fixedly connected to the aquaculture pond via a circulation pipe, and a circulation pump is fixedly connected to the circulation pipe.

[0006] Furthermore, the suspended aeration disc includes a suspension plate, on which a water pump is fixedly connected. The input end of the water pump passes through the suspension plate and is fixedly connected to a water pumping pipe, and the output end is fixedly connected to a nano-aeration disc through a pipe.

[0007] Furthermore, the moving mechanism includes a screw and a moving motor. Slide grooves are provided on both sides of the inner wall of the aquaculture tank. The screw is rotatably connected in the slide grooves. One end of the screw passes through the aquaculture tank and is fixedly connected to the output shaft of the moving motor. Moving blocks are fixedly connected to both sides of the grid baffle. The moving blocks are slidably connected in the slide grooves and threadedly connected to the screw.

[0008] Furthermore, dissolved oxygen sensors are fixedly connected in the upper, middle, and lower layers, and the dissolved oxygen sensors are communicatively connected to the controller.

[0009] Furthermore, a pressure regulator is fixedly connected to the oxygen delivery pipe, and the pressure regulator is controlled by the controller.

[0010] Furthermore, several inclined oxygenation nozzles are fixedly connected to the annular oxygenation pipe.

[0011] Furthermore, the bottom of the aquaculture pond slopes downward toward the sewage pipe, and a porous filter cover is fixedly connected to the upper end of the sewage pipe.

[0012] Furthermore, a spiral guide channel is provided on the inner wall of the aquaculture pond, and the circulation pipe is connected to the spiral guide channel.

[0013] Furthermore, a protective net is detachably connected to the outside of the oxygenation disc, and the mesh size of the protective net is 0.1-0.2 mm.

[0014] Furthermore, the through holes opened on the first and second partitions are inverted conical structures with a larger top and a smaller bottom.

[0015] This utility model has the following advantages compared with the prior art:

[0016] 1. This utility model divides the aquaculture pond into three aquaculture zones by setting up a first and second partition with a porous structure. A suspended aeration disc is set in the upper zone, an annular oxygenation pipe is set in the middle zone, and an oxygenation disc is set in the lower zone. This not only solves the problems of low dissolved oxygen diffusion efficiency caused by a single oxygenation method, resulting in insufficient dissolved oxygen in the middle and lower layers and causing drastic fluctuations in dissolved oxygen, which reduces the growth rate of salmon, but also allows for zoned aquaculture based on the water depth conditions that salmon adapt to at different growth stages.

[0017] 2. This utility model provides a channel at one end of the aquaculture pond corresponding to each aquaculture area and a fish collection and release trough fixedly connected thereto. At the same time, a moving mechanism is set in each aquaculture area, and a grid baffle is fixedly connected to the output end of the moving mechanism. The grid baffle can drive the salmon to the side of the fish collection and release trough, which can facilitate the stocking and harvesting of salmon in each individual aquaculture area.

[0018] 3. This utility model achieves simultaneous sewage discharge and water filtration and reuse by fixing a sewage pipe to the bottom of the aquaculture pond and connecting the sewage pipe to the filter water tank via a feeding pipe. By connecting the filter water tank to the upper part of the aquaculture pond via a circulation pipe, the water can be filtered and reused at the same time as sewage discharge, thus improving water resource utilization. By opening a spiral guide channel on the inner wall of the aquaculture pond and connecting the circulation pipe to the spiral guide channel, the water flow in the aquaculture pond can be promoted, thereby extending the contact time between oxygen and water and increasing dissolved oxygen.

[0019] 4. By connecting dissolved oxygen sensors to each breeding area and communicating with the controller, this utility model can realize real-time monitoring of dissolved oxygen levels in the breeding area, ensuring that dissolved oxygen levels meet standards during the breeding process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the annular oxygenation pipe and oxygenation nozzle structure.

[0022] In the diagram: 1. Aquaculture pond; 2. First partition; 3. Second partition; 4. Suspended aeration disc; 401. Suspension plate; 402. Water pump; 403. Nano aeration disc; 404. Water pumping pipe; 5. Fish tank; 6. Circular oxygenation pipe; 7. Oxygenation disc; 8. Oxygenation pump; 9. Oxygen supply pipe; 10. Sewage pipe; 11. Valve; 12. Filter tank; 13. Filter plate; 14. Feeding pipe; 15. Sewage pump; 16. Circulation pipe; 17. Circulation pump; 18. Grille baffle; 19. Screw; 20. Moving motor; 21. Oxygenation nozzle; 22. Porous filter cover. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1 , 2 The salmon farming pond shown includes a farming pond 1, which is divided into an upper zone, a middle zone, and a lower zone by a first partition 2 and a second partition 3 arranged at intervals. The pond can be used to farm salmon in different growth stages according to the zone it is adapted to. The upper zone is equipped with a suspended aeration disc 4. The middle zone is fixedly connected to the inner wall of the farming pond 1 with an annular aeration pipe 6. The lower zone is fixedly connected to the bottom of the farming pond 1 with an aeration disc 7. The annular aeration pipe 6 and the aeration disc 7 are respectively connected to the output end of the aeration pump 8 through an oxygen supply pipe 9. The first partition 2 and the second partition 3 are perforated plates. One end of the farming pond 1 has a channel corresponding to the upper zone, the middle zone, and the lower zone, and a fish trough 5 is fixedly connected to it. The upper zone, the middle zone, and the lower zone are respectively equipped with a grid baffle 18 that slides along the length of the farming pond 1 through a moving mechanism. The bottom of the farming pond 1 is fixedly connected to a sewage pipe 10, and a valve 11 is fixedly connected to the sewage pipe 10.

[0025] It should be noted that, in this embodiment, for ease of disassembly and cleaning, an installation plate is fixedly connected to the inner wall of the aquaculture pond 1, and the first partition 2 and the second partition 3 are detachably connected to the installation plate by bolts; in order to facilitate the flow of fish waste from the upper and middle layers through the through holes opened in the first partition 2 and the second partition 3, making the cleaning of fish waste more thorough, the through holes opened in the first partition 2 and the second partition 3 are inverted conical structures with a larger top and a smaller bottom; in order to avoid damage to the fish, the mesh openings of the grid baffle 18 are smaller than one-third the size of the salmon being farmed; during the aquaculture process, the grid baffle 18 is always located at one end opposite to the fish inlet / outlet 5.

[0026] To achieve water flow and conserve water resources, and to facilitate the removal of impurities from the water, the lower end of the sewage pipe 10 is fixedly connected to the upper end of the filter tank 12 via a feed pipe 14. A sewage pump 15 is fixedly connected to the feed pipe 14. A filter plate 13 is detachably connected to the middle of the filter tank 12. The lower end of one side of the filter tank 12 is fixedly connected to the aquaculture pond 1 via a circulation pipe 16. A circulation pump 17 is fixedly connected to the circulation pipe 16. It should be noted that in this embodiment, the filter plate 13 adopts a plate-shaped structure of fiber filter material. To facilitate the disassembly and replacement of the filter plate 13, a door is hinged to one side of the filter tank 12. A sealing strip is provided between the door and the filter tank 12. A mesh partition is fixedly connected to the middle of the filter tank 12, and the filter plate 13 is placed on the mesh partition.

[0027] To facilitate oxygenation of the upper layer, the suspended aeration disc 4 includes a suspension plate 401, on which a water pump 402 is fixedly connected. The input end of the water pump 402 passes through the suspension plate 401 and is fixedly connected to a water pump pipe 404, while its output end is fixedly connected to a nano-aeration disc 403 via a pipe. It should be noted that in this embodiment, the suspension plate 401 can be a foam board or an inflatable floating plate; the water pump 402 is a high-pressure water pump, and a power source, such as a battery pack, is fixedly connected to the suspension plate 401 to supply power to the water pump 402. Alternatively, the power source can be a solar photovoltaic power generation module plus a battery pack; the nano-aeration disc 403 is an existing device, and its specific structure will not be described in detail here.

[0028] To facilitate the stable movement of the grid baffle 18, the moving mechanism includes a screw 19 and a moving motor 20. The inner wall of the breeding pond 1 is provided with grooves on both sides along its length. The screw 19 is rotatably connected to the grooves through bearings. One end of the screw 19 passes through the breeding pond 1 and is fixedly connected to the output shaft of the moving motor 20, which is fixedly connected to the outside of the breeding pond 1. Moving blocks are fixedly connected to both sides of the grid baffle 18. The moving blocks are slidably connected to the grooves and threadedly connected to the screw 19.

[0029] In order to monitor the dissolved oxygen level in the water of each aquaculture area in the aquaculture pond in real time, dissolved oxygen sensors are fixedly connected in the upper, middle and lower layers, and the dissolved oxygen sensors are connected to the controller.

[0030] In order to adjust the oxygen supply intensity according to the dissolved oxygen content in the water and control the oxygen supply cost, a pressure regulator is fixedly connected to the oxygen supply pipe 9, and the pressure regulator is controlled by the controller.

[0031] In order to promote water flow during the oxygenation process, increase the contact time between oxygen and water, and thus increase the dissolved oxygen content, several inclined oxygenation nozzles 21 are fixedly connected at intervals on the annular oxygenation pipe 6.

[0032] To facilitate the thorough removal of fish feces, food scraps, and other debris, the bottom of the aquaculture pond 1 is tilted downwards towards the drain pipe 10. To protect the fish during the sewage discharge process, a porous filter cover 22 is fixedly connected to the upper end of the drain pipe 10.

[0033] In order to extend the water circulation path and ensure that the water can move as completely as possible during the oxygenation process, thereby increasing the dissolved oxygen content of the aquaculture water, a spiral guide channel is provided on the inner wall of the aquaculture pond 1, and the circulation pipe 16 is connected to the spiral guide channel.

[0034] To prevent algae and other impurities in the water from clogging the oxygen outlet of the oxygenation disc 7, a protective mesh with a mesh size of 0.1-0.2 mm is bolted to the outside of the oxygenation disc 7.

[0035] The working process of this embodiment is as follows:

[0036] In salmon farming, salmon at different growth stages are selected according to their suitable habitats and placed into the corresponding fish tanks 5. The salmon then enter different farming zones within the farming pond 1. During the farming process, oxygen is supplied by starting the aeration pump 8. Gas flows through the oxygen supply pipe 9 into the annular aeration pipe 6 and the aeration disc 7. The annular aeration pipe 6 aerates the middle layer of the farming pond 1 through the aeration nozzles 21, while the aeration disc 7 aerates the lower layer. Simultaneously, the water pump 402 is started, pumping water through the water pump pipe 404 to the nano-aeration disc 403 and spraying it out. The sprayed water, after sufficient contact with air, falls into the upper layer of the farming pond 1 to aerate it. During the aeration process, dissolved oxygen sensors monitor the dissolved oxygen levels in the three zones in real time and feed the monitoring data back to the controller. The controller adjusts the air pressure regulator based on the dissolved oxygen levels to control the aeration in the middle and lower layers. The valve 11 and sewage pump 15 are started intermittently. Under the action of sewage pump 15, debris at the bottom of the aquaculture pond 1 is pumped through sewage pipe 10 to the filter tank 12. After being filtered by filter plate 13, the water flows to the lower part of filter tank 12. The circulation pump 17 is started, and under its action, water is pumped from circulation pipe 16 into the aquaculture pond 1 and output along the spiral guide channel, thereby promoting the flow of aquaculture water along the spiral guide channel. When it is necessary to collect the salmon, the moving motor 20 is controlled to run. The moving motor 20 drives the screw 19 to rotate, thereby promoting the movement of the grid baffle 18 toward one end of the fish collection tank 5, driving the salmon to the fish collection tank 5 for collection.

Claims

1. A salmon farming pond with layered oxygenation structure, comprising a farming pond (1), characterized in that: The culture pond (1) is divided into upper layer area, middle layer area and lower layer area by first partition plate (2) and second partition plate (3) arranged at intervals, the upper layer area is provided with suspended aerator (4), the middle layer area is fixedly connected with annular oxygenation pipe (6), the lower layer area is fixedly connected with oxygenation disc (7), the annular oxygenation pipe (6) and oxygenation disc (7) are connected with the output end of oxygenation pump (8) through oxygenation pipe (9) respectively, the first partition plate (2) and second partition plate (3) are porous plates, one end of the culture pond (1) is provided with passageway corresponding to the positions of the upper layer area, middle layer area and lower layer area and is fixedly connected with fish receiving and releasing tank (5), the upper layer area, middle layer area and lower layer area are slidably connected with grating baffle (18) through moving mechanism respectively, the bottom of the culture pond (1) is fixedly connected with sewage pipe (10), the valve (11) is fixedly connected on the sewage pipe (10).

2. The salmon farming pond with layered oxygenation structure according to claim 1, characterized in that: The lower end of the sewage pipe (10) is fixedly connected with the upper end of filter water tank (12) through feeding pipe (14), the sewage pump (15) is fixedly connected on the feeding pipe (14), the filter plate (13) is detachably connected in the middle of the filter water tank (12), the lower end of one side of the filter water tank (12) is fixedly connected with the culture pond (1) through circulation pipe (16), the circulation pump (17) is fixedly connected on the circulation pipe (16).

3. The salmon farming pond with layered oxygenation structure according to claim 1, characterized in that: The suspended aerator (4) comprises suspension plate (401), the suspension plate (401) is fixedly connected with water pump (402), the input end of the water pump (402) is fixedly connected with water suction pipe (404) penetrating through the suspension plate (401), and the output end is fixedly connected with nano aerator (403) through pipeline.

4. The salmon farming pond with layered oxygenation structure according to claim 1, characterized in that: The moving mechanism comprises screw rod (19) and moving motor (20), the two sides of the inner wall of the culture pond (1) are provided with sliding groove, the screw rod (19) is rotatably connected in the sliding groove, one end of the screw rod (19) penetrates through the culture pond (1) and is fixedly connected with the output shaft of the moving motor (20), the two sides of the grating baffle (18) are fixedly connected with moving block, the moving block is slidably connected in the sliding groove and is threadedly connected with the screw rod (19).

5. The salmon farming pond with layered oxygenation structure according to claim 1, characterized in that: The upper layer area, middle layer area and lower layer area are fixedly connected with dissolved oxygen sensor, and the dissolved oxygen sensor is in communication connection with the controller.

6. The salmon farming pond with layered oxygenation structure according to claim 5, characterized in that: The oxygenation pipe (9) is fixedly connected with air pressure regulator, and the air pressure regulator is controlled by the controller.

7. The salmon farming pond with layered oxygenation structure according to claim 1, characterized in that: The annular oxygenation pipe (6) is fixedly connected with several inclined oxygenation nozzles (21).

8. The salmon farming pond with layered oxygenation structure according to claim 1, characterized in that: The bottom of the culture pond (1) is inclined downward toward the sewage pipe (10), and the upper end of the sewage pipe (10) is fixedly connected with porous filter cover (22).

9. The salmon farming pond with layered oxygenation structure according to claim 2, characterized in that: The inner wall of the culture pond (1) is provided with spiral flow guide groove, and the circulation pipe (16) is communicated with the spiral flow guide groove.

10. The salmon farming pond with layered oxygenation structure according to claim 1, characterized in that: The oxygenation disc (7) is detachably connected with protective net, and the pore size of the protective net is 0.1-0.2mm.

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