A device for net cage culture of the rice field eel in a greenhouse

Abstract

The utility model relates to the technical field of rice field eel culture, and specifically discloses a rice field eel net cage culture device in a greenhouse, which comprises a culture area for culture and a planting area arranged on one side of the culture area, and is used for purifying and treating sewage in the culture area; the culture area comprises a box body, an inner cavity is formed in the inner side of the box body, one or more fixing strips are arranged on the top of the inner cavity, and the inner cavity of the box body is equally divided into a plurality of separated areas; a sliding groove is formed at the diagonal of the inner wall of each separated area, a sliding block is slidably arranged in the inner side of the sliding groove, and a floating bed is arranged on the sliding block and used for the culture of target objects; the inner cavity of the box body is divided into a plurality of areas by the fixing strips, the rice field eels in different growth stages and specifications can be classified and cultured, the culture refinement degree is improved, the floating bed is lifted and lowered in the sliding groove with the aid of the sliding block and the water level, a stable habitat platform is provided for the rice field eels, and different water level conditions can be adapted.

Description

Technical Field

[0001] This utility model relates to the field of eel farming technology, specifically to a net cage farming device for eels in greenhouses. Background Technology

[0002] The swamp eel belongs to the genus *Sphaerophorus* in the family Synbranchidae of the order Synbranchia. It is a bottom-dwelling, warm-temperate fish. It is highly adaptable and widely distributed in my country, found almost everywhere except the Qinghai-Tibet Plateau, especially abundant in the Pearl River and Yangtze River basins. Swamp eels prefer to burrow, often living in muddy environments at the bottom of rivers, streams, rice paddies, and ditches. They exhibit a unique diurnal activity pattern: during the day, they hide in burrows to avoid high temperatures and sunlight, and at night they frequently emerge to forage. Swamp eels have relatively strict requirements for water temperature, with the optimal growth temperature being 22-28℃. When the water temperature is too high in summer, reaching above 36℃, swamp eels cannot adapt and may die, usually burrowing into burrows or the muddy bottom of ponds to escape the heat; when the water temperature drops below 15℃, swamp eels gradually stop feeding and enter a state of hibernation.

[0003] Currently, there are many common methods for farming eels, but they all have certain limitations.

[0004] For example, although rice paddy farming has low input and management costs and is suitable for the rice-eel-fish co-cultivation model, it faces the problem of difficult harvesting, which leads to increased labor and time costs, and the unit yield is low, making it difficult to significantly improve economic benefits.

[0005] In cement pond aquaculture, the pond has a long service life, the water exchange and silt removal are simple, and the water temperature is easy to control. However, this method has strict restrictions on the stocking density. If the stocking density is too high, it can easily lead to problems such as water quality deterioration and disease transmission, which will affect the growth and survival of the eels.

[0006] Pond cage culture has low costs and moderate labor intensity, but harvesting eels is extremely tedious, consuming a lot of manpower and potentially damaging the eels. Furthermore, it is affected by environmental factors such as water temperature, making year-round culture impossible and limiting output and profits.

[0007] In plastic greenhouses, soilless flowing water aquaculture is less prone to water quality deterioration, has smaller temperature differences, allows for earlier stocking and extended market availability, and results in relatively higher aquaculture profits. However, this model lacks suitable habitats for eels. If aquatic plants are used as habitats, their movement is inconvenient, making daily management and environmental adjustments difficult. Furthermore, the high equipment and management costs increase the economic burden of aquaculture.

[0008] In summary, existing methods of eel farming have many problems in terms of harvesting difficulty, yield improvement, breeding density restrictions, ease of harvesting, breeding cycle, habitat setting, and cost control. Therefore, this application provides a cage farming device for eels in a greenhouse. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a cage aquaculture device for eels in greenhouses, which solves the problems of existing eel farming methods in terms of harvesting difficulty, yield improvement, farming density restrictions, ease of harvesting, farming cycle, habitat setting, and cost control.

[0010] The present invention relates to a greenhouse eel cage culture device, which includes a culture area for culture and a planting area set on one side of the culture area for purifying wastewater from the culture area. The breeding area includes a box, the inner side of which has an inner cavity. One or more fixing strips are provided on the top of the inner cavity to divide the inner cavity of the box into multiple partitioned areas. Each of the partitioned areas has a groove at each of the four corners of its inner wall. A slider slides along the inside of the groove, and a floating bed is supported on the slider for the purpose of aquaculture of the target species. A micro-slit drain outlet is provided on one side of the inner cavity, and a guide slope with a preset angle is provided on the inner side of the micro-slit drain outlet to facilitate sewage discharge and drainage.

[0011] As a further improvement of this utility model, through holes are provided on both sides of the top of the box body, and an inlet and outlet system is installed at the through holes. There are two sets of the inlet and outlet system 2, one set of which is connected to a water storage tank and the other set is connected to an external water source. The inlet and outlet system includes pipes and is fixed to the through holes.

[0012] As a further improvement of this utility model, a control component is provided between the water storage tank and the inner side of one of the inlet and outlet systems to control the water inlet rate.

[0013] As a further improvement of this utility model, support feet are provided on the bottom of all four sides of the outer wall of the box, and the support feet are used to support the box.

[0014] As a further improvement of this utility model, the floating bed includes a body and a woven net. The body is mounted on the top of the slider and moves in a reciprocating linear motion through the chute and buoyancy.

[0015] As a further improvement of this utility model, the plate includes an upper layer and a lower layer, the thickness of the lower layer is less than the thickness of the upper layer, and the upper layer and the lower layer are connected by a support tube. There are two sets of support tubes, which are arranged symmetrically.

[0016] As a further improvement of this utility model, a reinforcing tube is provided between the two sets of supporting tubes to reinforce and support the supporting tubes. The supporting tubes, the reinforcing tubes, the upper layer, and the lower layer form a winding area, which is adapted to the woven mesh.

[0017] As a further improvement of this utility model, the inner wall of the upper layer is provided with a reinforcing frame on both sides, and a positioning hole is provided at the top center of the reinforcing frame. Multiple floating beds are connected to lifting rings through the positioning holes, and the lifting rings are engaged with the slots opened at the fixing strips.

[0018] As a further improvement of this utility model, the bottom of the upper layer is provided with a fitting groove at each of the four diagonal corners, which is adapted to the card block. The bottom of the lower layer is provided with a groove, which is provided with a filling area, and a floating medium is filled in the filling area.

[0019] As a further improvement of this utility model, the planting area includes a planting box, and a hydroponic area is provided inside the planting box. A connecting pipe is provided in the middle of the inner side of the hydroponic area, and the connecting pipe is connected to the box body of the breeding area.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: The inner cavity of the box of this utility model is divided into multiple areas by fixing strips, which can classify and raise eels of different growth stages and sizes, thereby improving the precision of farming. The floating bed rises and falls with the water level in the trough with the help of sliders, providing a stable habitat platform for eels and adapting to different water level conditions. Wastewater from the aquaculture area enters the hydroponic area of ​​the planting area through connecting pipes. Aquatic plants absorb nutrients and pollutants from the wastewater, and the purified water can be returned to the aquaculture area to achieve water resource recycling, reduce dependence on external water resources and aquaculture costs, and reduce environmental pollution. Furthermore, the layered structure, reinforcing pipes, and reinforcing frame design of the floating bed ensure stability; the lifting rings and splicing structure facilitate the cleaning, inspection, and adjustment of the floating bed. Meanwhile, the water intake and drainage system has two sets of systems, which are connected to the water storage tank and the external water source respectively. The control components can adjust the water intake rate, and can supply water precisely according to the different growth stages and aquaculture needs of the eels. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the three-dimensional structure of the aquaculture area of ​​this utility model; Figure 2 This is a schematic diagram of the combined structure of the aquaculture area and the inlet / outlet system of this utility model; Figure 3 This is a schematic diagram of the combined structure of the breeding area and the planting area of ​​this utility model; Figure 4 This is a side view of the aquaculture area structure of this utility model; Figure 5 This is a top view of the aquaculture area of ​​this utility model. Figure 6 This utility model Figure 5 Schematic diagram of the cross-sectional structure of the middle AA section; Figure 7 This is a three-dimensional structural diagram of the floating bed of this utility model; Figure 8 This is a three-dimensional structural diagram of the floating bed of this utility model from another angle; Figure 9 This is a front view structural diagram of the floating bed of this utility model; Figure 10 This utility model Figure 9 Schematic diagram of the cross-sectional structure of AA.

[0022] In the diagram: 1. Aquaculture area; 2. Inlet and outlet system; 3. Pipeline; 4. Water storage tank; 5. Control components; 6. Floating bed; 7. Planting area; 11. Housing; 12. Slider; 13. Slot; 14. Inner cavity; 15. Slide groove; 16. Fixing strip; 17. Through hole; 18. Micro-slit drain outlet; 19. Support foot; 110. Guide slope; 61. Woven mesh; 62. Body; 71. Hydroponic area; 72. Connecting pipe; 73. Planting box; 621. Lower layer; 622. Support tube; 623. Positioning hole; 624. Upper layer; 625. Reinforcing frame; 626. Fitting groove; 627. Filling area; 628. Reinforcing tube. Detailed Implementation

[0023] The following illustrations will reveal several embodiments of the present invention. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0024] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Please see Figure 1 , Figure 2 as well as Figure 3The swamp eel belongs to the order Synbranchia, family Synbranchidae, and genus *Sphaeroideae*. It is a benthic, warm-temperate fish that prefers to burrow and live in muddy environments such as rivers, streams, rice paddies, and ditches. It is distributed throughout my country except for the Qinghai-Tibet Plateau, and is particularly common in the Pearl River and Yangtze River basins, making it one of my country's most important economic fish species. Swamp eels are highly adaptable to their environment. During the day, they mostly hide in burrows to avoid high temperatures and sunlight, but frequently emerge at night to forage. The optimal water temperature for swamp eel growth is 22-28℃. When summer temperatures are too high, they will burrow into burrows or into the muddy bottom of ponds to escape the heat. The highest water temperature swamp eels can tolerate is 36℃; exceeding this temperature will result in death. When the temperature drops below 15℃, swamp eels gradually stop feeding and hibernate in burrows or deep in the mud.

[0026] Artificial farming of swamp eels in my country began in the early 1980s. After more than 40 years of development, the scale of farming has continued to expand, with Hubei Province consistently ranking among the top producers. Currently, swamp eel farming methods include rice paddy farming, cement pond farming, pond cage farming, and soilless flowing water farming in plastic greenhouses. Among these, rice paddy farming has low input and management costs, but harvesting is difficult and the yield per unit area is relatively low, making it suitable for rice-eel-fish co-cultivation. Cement pond farming has a long pond lifespan, simple water exchange and silt removal, and convenient water temperature control, but the stocking density should not be too high. Pond cage farming has low costs and moderate labor intensity, but harvesting swamp eels is cumbersome and cannot be done year-round. Soilless flowing water farming in plastic greenhouses has less water quality deterioration and smaller temperature differences, allowing for earlier stocking of swamp eels and extending the market season, resulting in higher farming efficiency. However, in the current soilless water aquaculture model in greenhouses, eels have no habitat or rely on aquatic plants for habitat. However, aquatic plants are inconvenient to move, and the equipment and management costs are high. Based on this, this application provides a cage aquaculture device for eels in greenhouses, including an aquaculture area 1 for aquaculture and a planting area 7 set on one side of the aquaculture area 1 for purifying the wastewater in the aquaculture area 1. The breeding area 1 includes a box 11, and an inner cavity 14 is provided on the inner side of the box 11. One or more fixing strips 16 are provided on the top of the inner cavity 14 to divide the inner cavity 14 of the box 11 into multiple partition areas. Each of the partitioned areas has a groove 15 at each of the four corners of its inner wall. A slider 12 slides on the inner side of the groove 15, and a floating bed 6 is supported on the slider 12 for the purpose of aquaculture of the target species. A micro-slit drain outlet 18 is provided on one side of the inner cavity 14, and a guide slope 110 with a preset angle is provided on the inner side of the micro-slit drain outlet 18 to facilitate sewage discharge and drainage.

[0027] This application relates to a cage aquaculture device for shad in a greenhouse, which mainly consists of an aquaculture area 1 for shad farming and a planting area 7 set on one side of the aquaculture area 1. The main function of the planting area 7 is to purify the wastewater generated by the aquaculture area 1, thereby realizing the recycling of resources, reducing the pollution of the environment caused by aquaculture, and improving the ecological benefits of the entire aquaculture system.

[0028] Specifically, the breeding area 1 includes a box 11, which provides space for the eels to live and move around. The inner side of the box 11 has an inner cavity 14, which is the actual breeding site for the eels. In order to make reasonable use of the space and facilitate management, one or more fixing strips 16 are set at the top of the inner cavity 14. These fixing strips 16 divide the inner cavity 14 of the box 11 into multiple partitioned areas. Each partitioned area can be used for eel breeding independently. In addition, the space of the partitioned area is equipped with a knotless polyethylene net cage, which is 80-120cm long, 60-100cm wide, and 50-60cm high, so as to facilitate the classification and breeding of eels of different growth stages and different sizes, thereby improving the precision of breeding.

[0029] To increase oxygen levels, two aeration pipes can be installed in each net cage, and Roots blowers of varying power can be used depending on the actual situation. In this aquaculture system, the blowers used in the four tanks have a power of 1.5KW.

[0030] Each partitioned area has vertically oriented grooves 15 located at the diagonal corners of its inner wall. Sliding blocks 12 are slidably connected to the inner side of each groove 15, allowing them to slide freely up and down within the groove. A floating bed 6 is mounted on the sliding block 12, designed to meet the needs of aquaculture of species such as eels. The floating bed 6 can move up and down within the partitioned area according to water level changes, always remaining afloat. When water is added to the tank 11, the water level rises, causing the sliding block 12 to slide upwards along the groove 15, raising the floating bed 6. When water is drained, the water level drops, causing the sliding block 12 to slide downwards along the groove 15, lowering the floating bed 6 accordingly. This design allows the floating bed 6 to adapt to water level changes, providing a relatively stable habitat and activity platform for the eels. The floating bed 6 can be made of lightweight, corrosion-resistant materials, such as PVC or PVCU pipes. It consists of two layers: the upper layer 624 is used to cultivate water hyacinth or water peanut, and the lower layer 621 is used to place artificial grass. During the day, the eels can rest in the lower layer 621, and when feeding them in the evening, the bed is placed on the aquatic plants in the upper layer 624 to avoid direct contact with the water and thus prevent water pollution. The advantages are that the floating bed 6 can be directly removed for harvesting the eels with a dip net, and the eel condition can be monitored at any time during the breeding process, allowing for timely disease prevention and control to reduce losses. The aquatic plants also help purify the water. The properties of PVC or PVCU materials ensure that the floating bed can float on the water surface without polluting the water.

[0031] A micro-slit drain outlet 18 is provided on one side of the inner cavity 14. The function of the micro-slit drain outlet 18 is to discharge sewage and impurities from the tank 11. The micro-slit design prevents eels from being discharged with the sewage, ensuring the safety of the eels. A guide slope 110 with a preset angle is provided on the inner side of the micro-slit drain outlet 18. The angle of the guide slope 110 can be adjusted according to actual conditions, and is generally suitable between 30° and 60°. The function of the guide slope 110 is to facilitate sewage discharge. When sewage in the tank 11 needs to be discharged, the sewage will flow along the guide slope 110 to the micro-slit drain outlet 18. Due to the inclination of the guide slope 110, the sewage can be discharged more smoothly, reducing sewage residue in the tank 11 and improving sewage discharge efficiency.

[0032] Planting area 7 is located on one side of aquaculture area 1. Planting area 7 can be planted with aquatic plants that purify water, such as calamus and water hyacinth. Wastewater from aquaculture area 1 is introduced into planting area 7 through pipes 3 and other means. The aquatic plants absorb nutrients such as nitrogen and phosphorus from the wastewater, reducing the pollutant content and thus purifying the wastewater. The purified water can then be returned to aquaculture area 1, achieving water resource recycling. This combined aquaculture and planting model not only reduces dependence on external water resources and lowers aquaculture costs but also reduces environmental pollution from aquaculture wastewater, resulting in significant ecological and economic benefits.

[0033] Please see Figure 2 , Figure 3 as well as Figure 4 Both sides of the top of the box 11 are provided with through holes 17. An inlet and outlet system 2 is installed at the through holes 17. There are two sets of the inlet and outlet system 2. One set of the inlet and outlet system 2 is connected to the water storage tank 4, and the other set is connected to the external water source. The inlet and outlet system includes a pipe 3, which is fixed to the through hole 17.

[0034] A control component 5 is provided between the water storage tank 4 and the inner side of one of the water inlet and outlet systems 2 to control the water inlet rate.

[0035] Support feet 19 are provided on the bottom of all four sides of the outer wall of the box 11, and the support feet 19 are used to support the box 11.

[0036] Both sides of the top of the tank 11 are provided with through holes 17, which are channels for water to enter and exit the tank 11. An inlet and outlet system 2 is installed at the through holes 17, which includes two sets of inlet and outlet systems 2.

[0037] When the water temperature fluctuates greatly, eels are prone to catching a cold. When changing the water, the water temperature should be controlled below 2℃. One set of inlet and outlet systems is connected to the water storage tank and used when changing the water in eel farming; the other set is directly connected to the water source outside the pond or tap water, which is convenient for cleaning the water tank.

[0038] A submersible pump and an automatic pump control float are installed inside the water storage tank, and a bottom drain micro-flow is set at the lowest sewage outlet.

[0039] An additional 75cm diameter sewage outlet is added every 5-8 meters on the inner side of the tank 11. An escape-proof net is installed at the sewage outlet, and a booster pump is installed on the sewage pipe 3 to increase the sewage discharge speed and power. In this breeding device, the power of the two sewage pumps is 2.2KW.

[0040] The function of the water storage tank 4 is to store water that has undergone certain treatment or is prepared for reuse. When the breeding tank 11 needs to be replenished with water, the water in the storage tank 4 can enter the tank 11 through the connected inlet and outlet system 2. The other inlet and outlet system 2 is connected to an external water source, which can be a natural water source, such as river or lake water, or pre-treated tap water. During the breeding process, when the water level in the storage tank 4 is insufficient or a new water source needs to be added, water can be supplied to the tank 11 through the inlet and outlet system 2 connected to the external water source.

[0041] Each inlet and outlet system 2 includes pipes 3, which are fixedly connected to the through holes 17 on the top of the tank 11 to ensure that water can flow smoothly into or out of the tank 11. The pipes 3 can be made of corrosion-resistant and non-toxic plastic material to ensure that the water quality is not affected, and at the same time extend the service life of the pipes 3.

[0042] A control component 5 is installed between the water storage tank 4 and one of the inlet / outlet systems 2. The main function of the control component 5 is to control the rate at which water flows from the water storage tank 4 into the tank body 11. The control component 5 can be a simple valve; by adjusting the valve's opening, the water flow rate is controlled, thereby controlling the water inlet rate. For example, the water requirement varies at different stages of eel growth. In the juvenile eel stage, the water inlet rate can be relatively slow to avoid excessive water flow impacting the juvenile eels; while in the adult eel stage, a faster water inlet rate may be needed to ensure water quality renewal. In addition, when a water change operation is required in the tank body 11, water from the water storage tank 4 can be quickly injected into the tank body 11 through the control component 5.

[0043] Support feet 19 are provided on all four sides of the bottom of the outer wall of the container 11. The function of the support feet 19 is to support the container 11, allowing it to be placed stably on the ground inside the greenhouse. The support feet 19 can be made of sturdy metal materials, such as stainless steel, to ensure sufficient strength and stability. The height of the support feet 19 can be adjusted according to actual needs. For example, if the ground inside the greenhouse is uneven, the height of the support feet 19 can be adjusted to ensure that the container 11 is level, preventing the water inside the container from tilting and affecting the living environment of the eels. At the same time, the support feet 19 also play a certain role in moisture prevention, maintaining a certain distance between the container 11 and the ground, reducing the corrosion of the container 11 by ground moisture, and extending the service life of the container 11.

[0044] During the eel farming process, when the water level in tank 11 drops or the water quality needs to be updated, water from storage tank 4 or an external water source can be used depending on the actual situation. If water from storage tank 4 is used, the water inflow rate is adjusted by control component 5, allowing water to slowly flow into tank 11 through pipe 3 and through-hole 17, providing a suitable living environment for the eels. When the water level in storage tank 4 is insufficient, the inlet and outlet system 2 connected to an external water source is activated to introduce external water into tank 11. Throughout the farming process, support legs 19 stably support tank 11, ensuring the normal operation of farming activities. Wastewater generated in farming area 1 is discharged through micro-slit drain outlet 18 and enters planting area 7 for purification treatment. The purified water can then be recycled back into storage tank 4.

[0045] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 as well as Figure 10 The floating bed 6 includes a body 62 and a woven net 61. The body 62 is mounted on the top of the slider 12 and moves in a reciprocating linear motion with buoyancy through the groove 15.

[0046] The plate includes an upper layer 624 and a lower layer 621. The thickness of the lower layer 621 is less than the thickness of the upper layer 624. The upper layer 624 and the lower layer 621 are connected by a support tube 622. There are two sets of support tubes 622, which are arranged symmetrically.

[0047] A reinforcing tube 628 is provided between the two sets of supporting tubes 622 to reinforce and support the supporting tubes 622. The supporting tubes 622, the reinforcing tubes 628, the upper layer 624, and the lower layer 621 form a winding area, which is adapted to the braided mesh 61.

[0048] The upper layer 624 has a reinforcing frame 625 on both sides of its inner wall. The top center of the reinforcing frame 625 has a positioning hole 623. Multiple floating beds 6 are connected to lifting rings through the positioning holes 623. The lifting rings are engaged with the slots 13 opened at the fixing strip 16.

[0049] The upper layer 624 has a fitting groove 626 at each of the four diagonal corners of its bottom, which is adapted to the card block. The lower layer 621 has a groove at its bottom, and a filling area 627 is provided in the groove, which is filled with a floating medium.

[0050] In the partitioned area of ​​the eel cage aquaculture device inside the greenhouse, the floating bed 6 is an important component. The floating bed 6 includes a body 62 and a woven net 61. The body 62 is mounted on top of the slider 12. Since the slider 12 can slide in the grooves 15 opened at the diagonal corners of the partitioned area, when the water level changes, the floating bed 6 will use the buoyancy of the water to move back and forth in a straight line as the slider 12 moves in the grooves 15. For example, when water is added to the cage 11 to raise the water level, the slider 12 will slide upward along the grooves 15, and the floating bed 6 will rise accordingly; when water is drained and the water level drops, the slider 12 will slide downward, and the floating bed 6 will drop accordingly, always maintaining a suitable water surface position, providing a stable habitat and activity space for the eels.

[0051] The main body 62 of the floating bed 6 is divided into an upper layer 624 and a lower layer 621, with the lower layer 621 being thinner than the upper layer 624. The upper layer 624 and the lower layer 621 are connected by support pipes 622, of which there are two sets arranged symmetrically. This symmetrical arrangement of support pipes 622 can evenly distribute the pressure between the upper layer 624 and the lower layer 621, making the structure of the floating bed 6 more stable. For example, when eels swim or when there is an impact from external water flow, the symmetrical support pipes 622 can better resist external forces and maintain the shape and stability of the floating bed 6.

[0052] A reinforcing pipe 628 is installed between the two sets of support pipes 622. The reinforcing pipe 628 serves to reinforce and support the support pipes 622. The support pipes 622, the reinforcing pipe 628, and the upper layer 624 and lower layer 621 together form a winding area, which is compatible with the woven net 61. The woven net 61 can be wound around this area, providing more attachment and hiding space for the eels, simulating a natural environment and making the eels feel safer. At the same time, the woven net 61 can also block some larger impurities from entering below the floating bed 6 to a certain extent, playing a certain filtering role.

[0053] The upper layer 624 has reinforcing frames 625 on both sides of its inner wall. These frames enhance the structural strength of the upper layer 624 and prevent deformation during use. A positioning hole 623 is provided at the top center of the reinforcing frame 625. Multiple floats 6 can be connected to lifting rings through these holes. The lifting rings engage with slots 13 on the fixing strip 16. This design allows the multiple floats 6 to be relatively fixed within the inner cavity 14 of the housing 11, preventing them from drifting freely in the water. When cleaning, inspection, or adjustment of the floats 6 is required, they can be easily lifted using the lifting rings, making operation more convenient.

[0054] The bottom of the upper layer 624 has matching grooves 626 at each of its four diagonal corners, which are adapted to the locking blocks. When multiple float beds 6 are spliced ​​together, the locking blocks can be inserted into the matching grooves 626 to make the adjacent float beds 6 more tightly connected, further improving the overall stability of the float beds 6. For example, in the case of strong water flow, this connection method can prevent the float beds 6 from colliding or separating with each other.

[0055] The bottom of the lower layer 621 has a groove with a filling area 627. The filling area 627 is filled with a floating medium, which can be a lightweight material such as foam plastic particles or hollow plastic balls. This floating medium can increase the buoyancy of the floating bed 6, ensuring that the floating bed 6 can float stably on the water surface. Even if the floating bed 6 carries a certain number of eels or other items during the breeding process, it can ensure that the floating bed 6 will not sink, providing a continuous and stable living environment for the eels.

[0056] In greenhouse eel cage culture, the above-mentioned structural design of the floating bed 6 offers several advantages. Its ability to move up and down with water level changes adapts to different culture needs and water conditions. The layered structure and reinforced design ensure the stability of the floating bed 6, providing a safe and reliable habitat for the eels. The woven netting 61 simulates a natural environment, which is beneficial to the growth and health of the eels. The lifting rings and splicing structure facilitate the management and maintenance of the floating bed 6, while the filling floating medium, such as air bladders, ensures that the floating bed 6 always floats on the water surface. Overall, this floating bed 6 structure helps improve the efficiency and quality of eel culture, providing strong support for greenhouse eel cage culture.

[0057] Please see Figure 1 , Figure 2 as well as Figure 3 The planting area 7 includes a planting box 73, and a hydroponic area 71 is provided inside the planting box 73. A connecting pipe 72 is provided in the middle of the inner side of the hydroponic area 71, and the connecting pipe 72 is connected to the box body 11 of the breeding area 1.

[0058] Planting area 7 works in conjunction with breeding area 1 to form a circular ecosystem. Planting area 7 is mainly composed of planting boxes 73, which provide space for hydroponic plants to grow. These hydroponic plants can purify the wastewater generated by breeding area 1, achieving effective resource utilization and sustainable environmental development.

[0059] Hydroponic area 71 is specifically designed for hydroponic plant growth, providing the necessary aquatic environment. Planting box 73 can be made of sturdy and corrosion-resistant materials, such as plastic or fiberglass, to ensure it remains undamaged even under prolonged water contact. The size and shape of hydroponic area 71 can be designed according to the actual scale and needs of the cultivation. Generally, its area should match the scale of cultivation area 1 to ensure effective treatment of wastewater.

[0060] A connecting pipe 72 is installed in the middle of the inner side of the hydroponic area 71. The main function of the connecting pipe 72 is to connect the planting area 7 to the container 11 of the breeding area 1. Through the connecting pipe 72, wastewater generated in the breeding area 1 can flow into the hydroponic area 71 of the planting container 73. The connecting pipe 72 can be made of plastic pipe 3, and its diameter should be determined according to the drainage volume of the breeding area 1 and the processing capacity of the planting area 7. For example, if the breeding area 1 is large and has a large drainage volume, the diameter of the connecting pipe 72 can be appropriately increased to ensure that the wastewater can flow smoothly into the planting area 7.

[0061] When wastewater needs to be discharged from container 11 in aquaculture area 1, it flows into the hydroponic area 71 of planting box 73 through connecting pipe 72. In hydroponic area 71, aquatic plants with water-purifying functions, such as calamus, water hyacinth, and canna, are planted. These aquatic plants can absorb nutrients such as nitrogen and phosphorus from the wastewater, as well as some heavy metal ions and organic pollutants, thereby reducing the pollutant content in the wastewater and achieving the purpose of purifying the water quality.

[0062] In actual aquaculture, as the eels grow and move around, wastewater is continuously generated in the tank 11 of aquaculture area 1. When the wastewater reaches a certain volume, it flows into the hydroponic area 71 of planting area 7 through the connecting pipe 72. After absorbing nutrients from the wastewater, the aquatic plants grow rapidly, and the purified water can be pumped back to aquaculture area 1, achieving water resource recycling. This combined aquaculture and planting model not only reduces dependence on external water resources and lowers aquaculture costs, but also reduces environmental pollution from aquaculture wastewater, resulting in good ecological and economic benefits.

[0063] For example, in a medium-sized greenhouse eel cage culture system, the cage 11 in culture area 1 generates a certain amount of wastewater daily. This wastewater flows through the connecting pipe 72 into the hydroponic area 71 of the planting box 73. Aquatic plants such as calamus grown in the hydroponic area 71 absorb nutrients from the wastewater, and after a period of purification, the water quality is significantly improved. Then, the purified water is pumped back to culture area 1 to continue providing a suitable living environment for the eels. This forms a complete cycle system for culture and wastewater purification, achieving efficient and environmentally friendly eel culture.

[0064] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A cage aquaculture device for yellow eels in a greenhouse, comprising an aquaculture area (1) for aquaculture and a planting area (7) set on one side of the aquaculture area (1) for purifying the wastewater of the aquaculture area (1); Its features are: The breeding area (1) includes a box (11), and an inner cavity (14) is provided on the inner side of the box (11). One or more fixing strips (16) are provided on the top of the inner cavity (14) to divide the inner cavity (14) of the box (11) into multiple partition areas. Each of the partitioned areas has a groove (15) at the diagonal corners of its inner wall. A slider (12) slides on the inner side of the groove (15), and a floating bed (6) is supported on the slider (12) for the purpose of aquaculture of the target object. A micro-slit drain outlet (18) is provided on one side of the inner cavity (14), and a guide slope (110) with a preset angle is provided on the inner side of the micro-slit drain outlet (18) to facilitate sewage discharge and drainage.

2. The greenhouse eel cage culture device according to claim 1, characterized in that: Both sides of the top of the box (11) are provided with through holes (17). An inlet and outlet system (2) is installed at the through hole (17). There are two sets of the inlet and outlet system (2). One set of the inlet and outlet system (2) is connected to a water storage tank (4), and the other set is connected to an external water source. The inlet and outlet system (2) includes a pipe (3) and is fixed to the through hole (17).

3. The greenhouse eel cage culture device according to claim 2, characterized in that: A control component (5) is provided between the water storage tank (4) and the inner side of one of the inlet and outlet systems (2) to control the rate of water inflow.

4. The greenhouse eel cage culture device according to claim 1, characterized in that: The bottom of the outer wall of the box (11) is provided with support feet (19), which are used to support the box (11).

5. The greenhouse eel cage culture device according to claim 1, characterized in that: The floating bed (6) includes a body (62) and a woven net (61). The body (62) is mounted on the top of the slider (12) and moves in a reciprocating linear motion with buoyancy through the groove (15).

6. The greenhouse eel cage culture device according to claim 5, characterized in that: The body (62) includes an upper layer (624) and a lower layer (621). The thickness of the lower layer (621) is less than the thickness of the upper layer (624). The upper layer (624) and the lower layer (621) are connected by a support tube (622). There are two sets of support tubes (622), which are arranged symmetrically.

7. The greenhouse eel cage culture device according to claim 6, characterized in that: A reinforcing tube (628) is provided between the two sets of support tubes (622) to reinforce and support the support tubes (622). The support tubes (622), the reinforcing tubes (628), the upper layer (624), and the lower layer (621) form a winding area, which is adapted to the woven mesh (61).

8. The greenhouse eel cage culture device according to claim 6, characterized in that: The upper layer (624) has a reinforcing frame (625) on both sides of its inner wall. The top center of the reinforcing frame (625) has a positioning hole (623). Multiple floating beds (6) are connected to lifting rings through the positioning holes (623). The lifting rings are engaged with the slots (13) opened at the fixing strip (16).

9. A greenhouse eel cage culture device according to claim 6, characterized in that: The upper layer (624) has a fitting groove (626) at each of the four corners of its bottom, which is adapted to the card block. The lower layer (621) has a groove at its bottom, and a filling area (627) is provided in the groove, which is filled with a floating medium.

10. The greenhouse eel cage culture device according to claim 1, characterized in that: The planting area (7) includes a planting box (73), and a hydroponic area (71) is provided on the inner side of the planting box (73). A connecting pipe (72) is provided in the middle of the inner side of the hydroponic area (71), and the connecting pipe (72) is connected to the box (11) of the breeding area (1).

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