Fish culture system in high-altitude area

Abstract

The invention discloses a fish culture system in a high altitude area, which belongs to the technical field of aquaculture and comprises a net cage, a cross beam support rod is fixedly connected to the net cage, floating blocks are lapped below two ends of the cross beam support rod, and the net cage floats on the water surface through the buoyancy of the floating blocks; the top cover comprises a frame and a transparent film, the frame is erected above the net cage, the bottom of the frame is fixedly connected with the floating block, and the transparent film covers the frame; the movable isolation structure is arranged on the outer side of the net cage to isolate water in the net cage; the oxygenation system comprises an aerator which is fixedly connected to the inner side of the frame, and the air inlet end of the aerator communicates with the top of the top cover through an oxygenation connecting pipe; the air outlet end of the aerator communicates with the bottom of the movable isolation structure through an aeration connecting pipe. The whole structure has the integrated advantage of heat preservation, body stabilization, oxygen uniformization and temperature and oxygen cooperation, the limitation of the high-altitude environment on fish culture is effectively broken through, normal growth of cultured organisms is guaranteed, and the culture stability and the basic efficiency are improved.

Description

Technical Field

[0001] This invention belongs to the field of aquaculture technology, and in particular relates to a fish farming system for high-altitude areas. Background Technology

[0002] High-altitude regions (generally referring to areas above 1500 meters in altitude) possess natural advantages such as clean water sources and abundant sunshine due to their unique geographical environment, making them potential locations for developing ecological aquaculture. However, the special climate and environmental characteristics of these regions have brought many unavoidable technical bottlenecks to the large-scale and efficient development of the aquaculture industry, becoming the core factor restricting the progress of the local aquaculture industry.

[0003] From an environmental perspective, the most significant characteristics of high-altitude regions include low temperatures, large diurnal temperature variations, low atmospheric pressure, and strong sunlight. Among these, water temperature and dissolved oxygen conditions have the most direct and critical impacts on aquaculture. Regarding water temperature, the atmospheric insulation effect is weak in high-altitude areas, with average annual temperatures generally lower than in plains regions. This results in aquaculture water bodies remaining at low temperatures year-round, with diurnal temperature variations reaching 10-15°C or even greater. Fish growth and development are closely related to water temperature; low temperatures significantly slow down fish metabolism, reduce feeding efficiency and digestive capacity, not only drastically prolonging the rearing cycle but also easily leading to uneven growth and weakened constitution, thus affecting both yield and quality.

[0004] Regarding dissolved oxygen, according to Henry's Law, the solubility of a gas in water is directly proportional to the ambient air pressure. In high-altitude areas, for every 1000 meters increase in altitude, atmospheric pressure decreases by approximately 10%, leading to a corresponding decrease in the partial pressure of oxygen. This results in a significant reduction in dissolved oxygen content in the water, typically only 60%-80% of that in plains areas. More importantly, the low temperature environment and differences in water density easily trigger dissolved oxygen stratification. The concentration difference between the upper and lower layers of water can reach over 3 mg / L. The bottom water remains in a low-oxygen state for extended periods, which not only inhibits fish activity and growth but also accelerates the anaerobic decomposition of uneaten feed, feces, and other organic matter, producing harmful substances such as ammonia nitrogen and hydrogen sulfide. This disrupts the balance of the aquaculture environment and increases the risk of disease and death in fish.

[0005] To address the aforementioned issues, existing aquaculture technologies in high-altitude areas mostly employ traditional pond farming methods or simply adapt existing farming equipment from plains areas, without developing targeted and efficient aquaculture solutions.

[0006] In summary, existing fish farming technologies in high-altitude areas cannot effectively coordinate the environmental challenges of low temperature, low oxygen, and strong light. They suffer from numerous drawbacks, including poor heat preservation, uneven dissolved oxygen distribution, low energy efficiency, strong stress responses in fish, and long farming cycles, making stable and efficient large-scale farming difficult. Therefore, developing a fish farming system that fully adapts to the characteristics of high-altitude environments and addresses core needs such as heat preservation and oxygenation, water quality control, and low energy consumption is crucial to overcoming current technological bottlenecks and promoting the sustainable development of the aquaculture industry in high-altitude areas. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention proposes a fish farming system for high-altitude areas.

[0008] To achieve the above objectives, the present invention provides a fish farming system for high-altitude areas, comprising: A net cage, on which a crossbeam support rod is fixedly connected, and floats are attached to the lower ends of the crossbeam support rod, so that the net cage floats on the water surface by the buoyancy of the floats; The top cover includes a frame and a transparent membrane. The frame is erected above the cage and the bottom of the frame is fixed to the floating block. The transparent membrane covers the outside of the frame. An active isolation structure is installed on the outside of the net cage to isolate the water inside the net cage; An oxygenation system includes an oxygenator, which is fixedly connected to the inner side of the frame. The air inlet of the oxygenator is connected to the top of the top cover through an oxygenation connecting pipe. The air outlet of the oxygenator is connected to the bottom of the movable isolation structure through an oxygenation connecting pipe.

[0009] Optionally, it also includes a heating system, which includes a heat-conducting pipe that is wound around the inner wall of the movable isolation structure. The heat-conducting pipe is heated by a heat source supply structure, which has multiple heating methods.

[0010] Optionally, the heat pipe is connected to a first circulating water pump, and the first circulating water pump is connected to a constant temperature water tank, which can be heated by any of the following heating methods: electric heating, solar heating, or air source heating.

[0011] Optionally, an electric heater is installed in the constant temperature water tank; the constant temperature water tank is also connected to a second circulating water pump, which is connected to a solar collector and an air source heat pump through an electrically controlled tee.

[0012] Optionally, the constant temperature water tank is equipped with a liquid level sensor and a water tank temperature sensor, and the water tank temperature sensor is electrically connected to a controller.

[0013] Optionally, the movable isolation structure includes a fixed cone sleeve, which is installed at the bottom of the cage, and the heat-conducting pipe is coiled around the inner wall of the fixed cone sleeve; the bottom of the fixed cone sleeve is connected to a sewage pipe through a drain valve; and a floating spacer is slidably connected to the outside of the fixed cone sleeve.

[0014] Optionally, the bottom of the frame is fixedly connected to the inner wall of the fixed cone sleeve via a connecting rod.

[0015] Optionally, an airbag is fixed to the top of the floating spacer, and a groove is formed at the bottom of the float corresponding to the airbag. When the airbag is fully inflated, it abuts against the groove at the bottom of the float, and when it is deflated, it separates from the groove at the bottom of the float.

[0016] Optionally, a cage temperature sensor and a water quality monitoring sensor are installed in the middle of the cage, and the cage temperature sensor and the water quality monitoring sensor are connected to the controller.

[0017] Optionally, the transparent film has two layers with a separator layer in between.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects: The net cages, supported by crossbeams and floats, float stably on the water surface using the buoyancy of the floats. This ensures the stability of the aquaculture space and adapts to the complex conditions of high-altitude waters, preventing disturbance from wind and waves. The combination of the top frame and transparent membrane allows for natural lighting and warming by taking full advantage of the strong sunlight at high altitudes. It also creates a closed, insulated space, effectively mitigating the impact of diurnal temperature variations on water temperature and alleviating the problem of slowed fish metabolism caused by low temperatures. The movable isolation structure effectively isolates the water inside the net cages, reducing the interference of external aquatic environmental fluctuations on the aquaculture water and ensuring... The stability of the aquaculture environment is ensured by the oxygenation system, which connects the air intake of the aerator to the top of the cover. This allows warm air preheated by sunlight to be introduced into the cover, supplementing the scarce dissolved oxygen at high altitudes and indirectly warming the water while reducing energy consumption. The air outlet is connected to the bottom of the movable isolation structure, allowing oxygen to diffuse to the deeper layers of the water, preventing dissolved oxygen stratification and significantly improving the uniformity of dissolved oxygen in the water. Combined with the overall structure, this creates an integrated advantage of "heat preservation, body stability, uniform oxygenation, and temperature-oxygen synergy," effectively overcoming the limitations of high-altitude environments on fish farming, ensuring the normal growth of farmed organisms, and improving the stability and basic efficiency of aquaculture. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the high-altitude fish farming system of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram of the heating system structure in this invention; Figure 4 This is a schematic diagram of the temperature control process of the present invention.

[0020] In the diagram: 1. Net cage; 2. Crossbeam support rod; 3. Float; 4. Top cover; 5. Movable isolation structure; 6. Oxygenation system; 7. Heating system; 8. Sewage pipeline; 9. Connecting rod; 10. Net cage temperature sensor; 11. Water quality monitoring sensor; 401. Frame; 402. Transparent membrane; 501. Fixed cone sleeve; 502. Sewage valve; 503. Floating partition; 504. Airbag; 601. Aerator; 602. Oxygenation connecting pipe; 701. Heat conduction pipe; 702. First circulating water pump; 703. Constant temperature water tank; 704. Electric heater; 705. Second circulating water pump; 706. Solar collector; 707. Air source heat pump; 708. Liquid level sensor; 709. Water tank temperature sensor. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1 to 3 As shown, this embodiment provides a fish farming system for high-altitude areas, including: Net cage 1, with a crossbeam support rod 2 fixed on net cage 1, and floats 3 attached to the lower ends of the crossbeam support rod 2. The buoyancy of the floats 3 makes net cage 1 float on the water surface. The top cover 4 includes a frame 401 and a transparent membrane 402. The frame 401 is built on top of the cage 1, and the bottom of the frame 401 is fixed to the floating block 3. The transparent membrane 402 covers the outside of the frame 401. The movable isolation structure 5 is set on the outside of the net cage 1 to isolate the water inside the net cage 1; The oxygenation system 6 includes an oxygenator 601, which is fixed to the inside of the frame 401. The air inlet of the oxygenator 601 is connected to the top of the top cover 4 through an oxygenation connecting pipe 602. The air outlet of the oxygenator 601 is connected to the bottom of the movable isolation structure 5 through an oxygenation connecting pipe 602.

[0024] The net cage 1, supported by crossbeams 2 and floats 3, floats stably on the water surface with the help of the buoyancy of the floats 3. This ensures the stability of the aquaculture space and adapts to the complex conditions of high-altitude waters, preventing wind and waves from interfering with the aquaculture area. The frame 401 of the top cover 4, combined with the transparent membrane 402, can fully utilize the advantages of strong sunlight at high altitudes to achieve natural lighting and heating, and can also form a closed, insulated space to effectively reduce the impact of diurnal temperature differences on water temperature and alleviate the problem of slow fish metabolism caused by low temperatures. The movable isolation structure 5 can effectively isolate the water inside the net cage 1, reducing the interference of external aquatic environmental fluctuations on the aquaculture water. This ensures the stability of the aquaculture environment. The oxygenation system 6, through the design of connecting the air inlet of the aerator 601 to the top of the top cover 4, can introduce warm air preheated by sunlight into the top cover 4. While supplementing the scarce dissolved oxygen at high altitudes, it indirectly warms the water and reduces energy consumption. The air outlet is connected to the bottom of the movable isolation structure 5, which allows oxygen to diffuse to the deeper layers of the water, avoids dissolved oxygen stratification, and significantly improves the uniformity of dissolved oxygen in the water. Together with the overall structure, it forms an integrated advantage of "heat preservation-stabilization-uniform oxygenation-temperature-oxygen synergy", effectively breaking through the limitations of high-altitude environment on fish farming, ensuring the normal growth of farmed organisms, and improving the stability and basic efficiency of farming.

[0025] Furthermore, the oxygenation connection pipe 602 at the outlet end of the aerator 601 is connected to an oxygenation nozzle, which can improve the uniformity of oxygen diffusion in the water.

[0026] In some alternative implementations, a heating system 7 is also included, which includes a heat-conducting pipe 701 that is wound around the inner wall of the movable isolation structure 5. The heat-conducting pipe 701 is heated by a heat source supply structure, which has multiple heating methods.

[0027] In some alternative implementations, the heat pipe 701 is connected to a first circulating water pump 702, and the first circulating water pump 702 is connected to a constant temperature water tank 703, which can be heated by any of the following heating methods: electric heating, solar heating, or air source heating.

[0028] In some alternative implementations, an electric heater 704 is installed in the constant temperature water tank 703; the constant temperature water tank 703 is also connected to a second circulating water pump 705, which is connected to a solar collector 706 and an air source heat pump 707 via an electrically controlled tee.

[0029] In some alternative implementations, the constant temperature water tank 703 is equipped with a liquid level sensor 708 and a water tank temperature sensor 709, the water tank temperature sensor 709 being electrically connected to a controller.

[0030] The arrangement of the heat pipe 701, wound around the inner wall of the movable isolation structure 5, allows the heat supplied by the heat source to be directly and evenly transferred to the aquaculture water, avoiding stress damage to fish caused by excessive local temperature differences. Simultaneously, the water isolation function of the movable isolation structure 5 reduces heat loss to the outside, significantly improving heat preservation efficiency. In the multi-heat source supply design, the solar collector 706 maximizes the natural advantage of strong sunlight at high altitudes, achieving clean energy heating to reduce aquaculture energy consumption. The air source heat pump 707, with its high energy efficiency ratio, efficiently supplements heat when solar energy is insufficient. The electric heater 704 serves as an emergency backup. These three components are linked to the second circulating water pump 705 via an electrically controlled three-way valve, forming a complementary heating mode of "prioritizing clean energy, secondary high-efficiency supplementary heating, and emergency backup," adaptable to the complex and changeable weather at high altitudes. The combination of the first circulating water pump 702 and the constant temperature water tank 703 enables continuous circulation of hot water and heat storage, ensuring that the water temperature remains stable within the suitable growth range for fish and avoiding sudden temperature rises and falls. The liquid level sensor 708 in the constant temperature water tank 703 can monitor the water volume in real time to prevent water shortage from causing heating interruptions. The electrical connection between the water tank temperature sensor 709 and the controller enables intelligent and precise temperature control. The controller automatically switches the heating mode according to the measured temperature, which can flexibly adapt to different environmental conditions without manual intervention. This ensures a constant water temperature and avoids the problems of excessive energy consumption or unstable heating caused by a single heat source. It effectively shortens the fish farming cycle, improves farming efficiency and energy utilization, and provides a safe and stable temperature environment for farmed organisms, further breaking through the temperature limitations of high-altitude environments for aquaculture.

[0031] In some alternative implementations, the movable isolation structure 5 includes a fixed cone sleeve 501, which covers the bottom of the cage 1, and a heat-conducting pipe 701 is coiled around the inner wall of the fixed cone sleeve 501; the bottom of the fixed cone sleeve 501 is connected to a sewage pipe 8 through a drain valve 502; and a floating partition sleeve 503 is slidably connected to the outside of the fixed cone sleeve 501.

[0032] In some alternative implementations, the bottom of frame 401 is fixedly connected to the inner wall of fixed cone sleeve 501 via connecting rod 9.

[0033] In some alternative implementations, an airbag 504 is fixed to the top of the floating spacer 503, and a groove is provided at the bottom of the float 3 corresponding to the airbag 504. When the airbag 504 is fully inflated, it abuts against the groove at the bottom of the float 3, and when it is deflated, it separates from the groove at the bottom of the float 3.

[0034] In some alternative implementations, a cage temperature sensor 10 and a water quality monitoring sensor 11 are installed in the middle of the cage 1, and the cage temperature sensor 10 and the water quality monitoring sensor 11 are connected to the controller.

[0035] The fixed cone sleeve 501 in the active isolation structure 5 provides a stable coiled mounting carrier for the heat pipe 701, allowing the heat from the heating system 7 to be evenly transferred to the aquaculture water along the inner wall of the cone sleeve, avoiding local temperature stress. It also provides a pathway for wastewater discharge through the bottom drain valve 502 and the wastewater pipe 8. The floating partition sleeve 503, slidably connected to its outer side, enables water isolation and water exchange switching. The bottom of the frame 401 is fixedly connected to the inner wall of the fixed cone sleeve via the connecting rod 9, effectively limiting the floating displacement of the frame 401 and the net cage 1, enhancing the structural stability of the system in high-altitude, windy, and wave-prone environments, and preventing environmental fluctuations caused by the displacement of the aquaculture area. The air bladder 504 at the top of the floating partition sleeve 503 and the matching design of the bottom groove of the float 3 form a sealed space when fully inflated. The top cover 4 and transparent membrane 402 enhance the heat preservation effect and reduce heat loss. When there is a lack of air, the membrane separates from the groove, allowing the floating partition 503 to sink with gravity. Together with the drain valve 502, it enables the slow discharge of sewage and the steady injection of clean water, reducing the stress damage to fish caused by sudden changes in water temperature during water changes. The cage temperature sensor 10 and water quality monitoring sensor 11 installed in the middle of the cage 1 can capture changes in water temperature and water quality in real time, providing accurate data support for the temperature control of the heating system 7, the oxygen supply regulation of the aeration system 6, and the sewage discharge and water change operations. This achieves a closed loop of "monitoring-control", ensuring that the aquaculture water temperature is suitable, the water quality is clean and stable, and further adapting to the environmental characteristics of high altitude, low temperature and easy water quality deterioration, ensuring the normal metabolism and growth of fish, and improving the survival rate and efficiency of aquaculture.

[0036] In some alternative embodiments, the transparent film 402 is double-layered with a separator layer in between.

[0037] The double-layer transparent membrane 402, together with the intermediate partition layer, forms a highly efficient heat-insulating cavity. The still air inside the partition layer, as a poor conductor of heat, can significantly reduce the heat exchange between the inside of the cage 1 and the external environment. This effectively locks in the natural heat generated by the strong sunlight at high altitude using the top cover 4, and also blocks the invasion of low external temperatures into the aquaculture water, greatly improving the system's heat preservation performance and further reducing diurnal water temperature fluctuations, thus preventing fish from experiencing stress responses due to sudden temperature changes. At the same time, the double-layer transparent membrane 402 retains good light transmittance, does not affect the penetration of strong sunlight at high altitude, and can make full use of clean energy to assist in water temperature rise, forming a synergy with the heating system 7 and reducing additional heating energy consumption.

[0038] The specific work process is as follows: I. System Initialization and Standby State After the system starts, it first enters the initialization phase: the air bladder 504 at the top of the floating partition 503 is automatically inflated through the inflation valve. After expansion, it fits tightly against the groove at the bottom of the float 3. Together with the double-layer transparent film 402 of the top cover 4 and the intermediate partition layer, it forms a closed heat-insulating cavity, reducing the heat exchange between the internal water and the outside. The bottom of the frame 401 is fixedly connected to the inner wall of the fixed cone sleeve 501 through the connecting rod 9, ensuring the relative position stability of the net cage 1, the top cover 4 and the movable isolation structure 5, and avoiding floating displacement caused by wind and waves. The net cage temperature sensor 10 and water quality monitoring sensor 11 in the middle of the net cage 1, the liquid level sensor 708 and water tank temperature sensor 709 in the constant temperature water tank 703 begin to collect data in real time and transmit the signals to the controller. The aerator 601, circulating water pump and heat source equipment are all in standby mode, and only the sensing and control module maintains low power consumption operation.

[0039] II. Temperature Control Process See attached document Figure 4 As shown, the controller automatically switches the heating mode according to the detection data of the cage temperature sensor 10 and the water tank temperature sensor 709, prioritizing "solar energy first, air energy auxiliary, and electric heating emergency". Solar Active Circulation Mode: When the temperature difference between the outlet temperature of the solar collector 706 and the constant temperature water tank 703 reaches a set threshold, the controller switches the electric three-way valve to the solar collector 706 channel, starting the second circulating water pump 705. This pumps the low-temperature water from the constant temperature water tank 703 into the solar collector 706 for heating, and the hot water flows back to the constant temperature water tank 703 to store heat. Simultaneously, the first circulating water pump 702 starts, causing the hot water in the constant temperature water tank 703 to circulate through the heat-conducting pipe 701 wrapped around the inner wall of the fixed cone sleeve 501. Heat is evenly transferred to the water in the net box 1 through the heat-conducting pipe 701, achieving temperature increase. When the temperature difference decreases to the stop threshold, the second circulating water pump 705 stops, and the first circulating water pump 702 operates intermittently according to water temperature fluctuations.

[0040] Air source heat pump 707 auxiliary mode: When the solar energy is insufficient and the temperature difference is lower than the start-up threshold, and the water temperature of the net box 1 is lower than the set target value, the controller controls the electric control three-way to switch to the air source heat pump 707 channel, starts the air source heat pump 707 and the second circulating water pump 705 to heat the circulating water until the water temperature of the net box 1 reaches the target value, and then the equipment stands by.

[0041] Emergency mode of electric heater 704: When continuous severe weather causes solar energy and air energy to be unable to meet the demand, and the water temperature of cage 1 drops to the minimum guaranteed temperature, the controller starts the electric heater 704 in the constant temperature water tank 703, while keeping the first circulating water pump 702 working continuously, and providing bottom heating to the water body through the heat conduction pipe 701 to ensure the survival safety of fish.

[0042] Insulation standby mode: When the water temperature of cage 1 reaches the target value and the fluctuation range is ≤±1℃, the controller shuts down all heat source equipment and circulating water pumps, and maintains the water temperature only by relying on the insulation structure of the double-layer transparent membrane 402 and the insulation cavity formed by the sealed airbag 504, and enters the low power standby state.

[0043] III. Oxygenation Process The controller automatically controls the operation of the oxygenation system 6 based on the dissolved oxygen data detected by the water quality monitoring sensor 11. When the dissolved oxygen content is lower than the set lower limit, the aerator 601 is started. The air intake end of the aerator 601 draws in warm air preheated by light from the closed space at the top of the top cover 4 through the aeration connection pipe 602, so as to avoid cold air being directly injected and causing a sudden drop in water temperature. After being pressurized by the aerator 601, the air is delivered to one side of the inner wall of the fixed cone sleeve 501 through the aeration connection pipe 602 at the air outlet. It can be further dispersed into tiny bubbles by the aeration nozzle and evenly injected into the deep layer of the water body, increasing the contact area between the air and the water body and improving the dissolved oxygen efficiency. When the dissolved oxygen content exceeds the set upper limit, the aerator 601 stops working to avoid excessive oxygenation and energy waste. During temperature control, the aerator 601 works intermittently to prevent dissolved oxygen stratification in the water.

[0044] IV. Wastewater Discharge and Water Replacement Process The wastewater discharge and water exchange process is centered on "gentle switching and stable water environment". Relying on the coordinated action of airbag 504, floating diaphragm 503 and wastewater valve 502, and with the accurate feedback of water quality monitoring sensor 11, the stress impact of water exchange on fish is minimized. The specific process is as follows: In the initial state, the air bladder 504 at the top of the floating sump 503 is inflated. After inflation, it expands upward and fits tightly against the groove at the bottom of the float 3. Together with the double-layer transparent membrane 402 of the top cover 4, it forms a closed space, effectively locking in the heat of the water in the cage 1, ensuring a constant water temperature, and providing a stable temperature environment for the fish. The water quality monitoring sensor 11 in the middle of the cage 1 collects water indicators in real time. When it detects water quality deterioration, such as excessive ammonia nitrogen, abnormal pH value, or persistently low water oxygen content, and the oxygenation system 6 is ruled out as a fault factor, it triggers the sewage discharge and water exchange process. The controller controls the airbag 504 to slowly open the deflation valve, the gas inside the airbag 504 is released at a uniform speed and gradually contracts, completely separating from the groove at the bottom of the float 3. As the airbag 504 contracts, the floating septum 503 slowly sinks along the outer wall of the fixed cone sleeve 501 under its own gravity, gradually opening the communication channel between the inside of the cage 1 and the outside water, thus avoiding the impact of water flow caused by the instantaneous opening of the channel. Simultaneously open the drain valve 502 at the bottom of the fixed cone sleeve 501. The sewage containing residual bait and feces in the net cage 1 is slowly discharged through the sewage pipe 8 under the natural action of the water level difference, without the need for additional power drive, thus reducing energy consumption. While the sewage is being discharged, clean water from the outside slowly flows into cage 1 under the effect of water pressure balance, achieving natural water replacement. The entire water replacement process is gentle, avoiding sudden changes in water temperature and quality, and significantly reducing the stress of fish in high-altitude and low-temperature environments. When the water quality monitoring sensor 11 detects that the dissolved oxygen, ammonia nitrogen, and pH value of the water body have returned to the suitable range for aquaculture, the controller closes the sewage discharge valve 502 and at the same time controls the airbag 504 inflation valve to open. The airbag 504 re-inflates and pushes the floating spacer 503 to float up and reset along the fixed cone sleeve 501 until the airbag 504 abuts against the bottom groove of the float 3 again, restoring the closed and heat-insulating state, and completing the sewage discharge and water replacement.

[0045] V. Anomaly Handling and System Interaction If the level sensor 708 detects that the water level in the constant temperature water tank 703 is lower than the set value, the controller will automatically open the water inlet valve of the constant temperature water tank 703 to replenish water. After replenishing water, the valve will be closed to prevent insufficient circulating water from causing heating interruption. If the water quality sensor detects that the water quality still does not meet the standard after water replacement, the controller repeats the sewage discharge and water replacement process until the indicators meet the standard. When the cage temperature sensor 10 detects a sudden rise or fall in water temperature, such as a fluctuation exceeding 3°C within 1 hour, the controller activates the alarm mechanism and adjusts the circulating water pump speed or heat source output power to quickly stabilize the water temperature. The oxygenation process works in conjunction with temperature control. The warm air drawn in by the aerator 601 can help raise the water temperature, reduce the energy consumption of the heating system 7, and achieve a synergistic effect of "oxygenation-heat preservation".

[0046] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0047] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0048] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A fish farming system for high-altitude areas, characterized in that, include: A net cage (1) is fixed with a crossbeam support rod (2), and floats (3) are attached to the lower ends of the crossbeam support rod (2). The net cage (1) floats on the water surface by the buoyancy of the floats (3). The top cover (4) includes a frame (401) and a transparent membrane (402). The frame (401) is built above the cage (1), and the bottom of the frame (401) is fixed to the floating block (3). The transparent membrane (402) covers the frame (401). An active isolation structure (5) is installed on the outside of the net cage (1) to isolate the water inside the net cage (1); The oxygenation system (6) includes an oxygenator (601), which is fixed to the inside of the frame (401). The air inlet of the oxygenator (601) is connected to the top of the top cover (4) through an oxygenation connecting pipe (602); the air outlet of the oxygenator (601) is connected to the bottom of the movable isolation structure (5) through an oxygenation connecting pipe (602).

2. The high-altitude fish farming system according to claim 1, characterized in that, It also includes a heating system (7), which includes a heat-conducting pipe (701) which is wound around the inner wall of the movable isolation structure (5). The heat-conducting pipe (701) is heated by a heat source supply structure, which has multiple heating methods.

3. The high-altitude fish farming system according to claim 2, characterized in that, The heat pipe (701) is connected to a first circulating water pump (702), and the first circulating water pump (702) is connected to a constant temperature water tank (703). The constant temperature water tank (703) can be heated by any of the following heating methods: electric heating, solar heating, or air source heating.

4. The high-altitude fish farming system according to claim 3, characterized in that, An electric heater (704) is installed in the constant temperature water tank (703); the constant temperature water tank (703) is also connected to a second circulating water pump (705), which is connected to a solar collector (706) and an air source heat pump (707) through an electric control tee.

5. The high-altitude fish farming system according to claim 4, characterized in that, The constant temperature water tank (703) is equipped with a liquid level sensor (708) and a water tank temperature sensor (709), and the water tank temperature sensor (709) is electrically connected to a controller.

6. The high-altitude fish farming system according to claim 2, characterized in that, The movable isolation structure (5) includes a fixed cone sleeve (501), which covers the bottom of the cage (1), and the heat-conducting pipe (701) is coiled around the inner wall of the fixed cone sleeve (501); the bottom of the fixed cone sleeve (501) is connected to a sewage pipe (8) through a drain valve (502); and a floating partition sleeve (503) is slidably connected to the outside of the fixed cone sleeve (501).

7. The high-altitude fish farming system according to claim 6, characterized in that, The bottom of the frame (401) is fixedly connected to the inner wall of the fixed cone sleeve (501) via a connecting rod (9).

8. The high-altitude fish farming system according to claim 6, characterized in that, The top of the floating spacer (503) is fixed with an airbag (504), and the bottom of the float (3) is provided with a groove corresponding to the airbag (504). When the airbag (504) is full of air, it abuts against the groove at the bottom of the float (3), and when it is deficient in air, it separates from the groove at the bottom of the float (3).

9. The high-altitude fish farming system according to claim 5, characterized in that, A cage temperature sensor (10) and a water quality monitoring sensor (11) are installed in the middle of the cage (1), and the cage temperature sensor (10) and the water quality monitoring sensor (11) are connected to the controller.

10. The high-altitude fish farming system according to claim 1, characterized in that, The transparent film (402) has two layers and a separator layer in the middle.

Images