Multi-layer eel breeding box
By designing a multi-layer eel farming tank, which employs multi-layer farming troughs and a tidal flow pattern, the problem of high-density farming is solved, achieving efficient and healthy growth of eels and effective water quality management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGSHA YULEGU AGRI TECH CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-04-17
AI Technical Summary
Existing eel farming methods cannot achieve high-density farming and have problems such as complex structure or inconvenience.
A multi-layer eel farming tank is designed, which adopts multiple sets of multi-layer farming tanks, tidal flow mode, and is equipped with grid trays and aeration mechanism. Combined with sloping bottom design and channel structure, it can realize high-density farming and water body cleaning management.
It enables high-density eel farming, with clean water, convenient eel entry and exit, easy feeding, light and sound insulation, excellent water quality, and sufficient dissolved oxygen, which is suitable for the healthy growth of eels.
Smart Images

Figure CN224124991U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a multi-layer eel farming box. Background Technology
[0002] Due to the high market price of eels, eel farming has high economic benefits and is currently a relatively ideal aquaculture species.
[0003] There are various existing methods for eel farming; for example, Chinese patent CN 105660476 A describes a method in which multiple rows of cement pillars are evenly arranged in an eel pond, with wire mesh between the cement pillars and the eel pond divided into multiple wire mesh boxes. The wire mesh and the cement pillars are fixed by hooks. This method cannot guarantee high-density farming.
[0004] Chinese patent CN 220734058 U discloses a small eel farming pond. The core of this pond is to divide the tank into multiple farming compartments by partitions. However, this solution does not solve the problem of high-density farming.
[0005] Patent CN 221554411 U discloses a split-type eel farming device. The feeding components include a water inlet box and multiple feeding boxes. The water inlet box is fixedly connected to a support frame, and the multiple feeding boxes are connected to the water inlet box. The function of the water inlet box is to collect eel feces. This solution is relatively complex, and the farming density needs to be further improved.
[0006] Therefore, it is necessary to design a new eel farming tank that can support high-density farming. Utility Model Content
[0007] The technical problem to be solved by this utility model is to provide a multi-layer eel farming box, which has a compact structure, rich functions, and is suitable for high-density farming.
[0008] The technical solution of the utility model is as follows:
[0009] A multi-layer eel farming box includes a box body and multi-layer farming tanks set inside the box body;
[0010] The bottom of the box is equipped with a drain pipe with a drain valve; the top of the box is also equipped with a water inlet pipe with a water inlet valve.
[0011] The top of the box is equipped with a bait rack;
[0012] The bait rack is equipped with a bait platform for placing bait.
[0013] The feed rack adopts an inverted trapezoidal or square frame structure and is located above the multi-layer breeding tank.
[0014] The bottom of the container is equipped with a grid bracket, and multi-layer breeding tanks are set on the bracket; a bottom channel for collecting and discharging sewage is formed between the bracket and the bottom of the container.
[0015] The multi-layer aquaculture tank consists of multiple sets.
[0016] There is a central passage between adjacent multi-layered aquaculture tanks.
[0017] A side passage is provided between the multi-layer breeding tank and the inner wall of the box.
[0018] The bracket is fixed with an aeration pipe or aeration disc.
[0019] The water inlet pipe is located at the bottom of the tank.
[0020] A flow propulsion device is connected to the outlet end of the inlet pipe.
[0021] The bait rack is a mesh rack.
[0022] Each layer of the multi-layer aquaculture tank has honeycomb-shaped, trapezoidal, or triangular alleyways.
[0023] The box has a sloping bottom. Beneficial effects
[0024] This utility model discloses a multi-layer eel farming box, employing multiple sets of multi-layer farming tanks and a tidal flow-flow farming mode. The overall layout is scientifically sound and rational, with multiple aisles on each layer to support high-density farming. The farming tanks have channels around their perimeter for easy eel movement and ventilation. The feeding platform has feeding holes for convenient feeding, and its wider top and narrower bottom design provides shade and sound insulation, facilitating light avoidance, ventilation, and feeding for the eels. The bottom is designed with a grid tray, waste collection and drainage channels, effectively separating waste from the farming water. Through the tidal flow-flow farming mode, regular water pushing and waste removal allow for rapid removal of residues, effectively maintaining water cleanliness and ensuring that ammonia nitrogen and nitrite levels remain below preset limits. A ring-shaped aeration mechanism is installed on the grid tray for continuous aeration (supplementing air or pure oxygen) to maintain dissolved oxygen levels in the water. In summary, this multi-layer eel farming box is compact, functional, and suitable for high-density eel farming. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of a multi-layer eel farming tank;
[0026] Figure 2 This is a schematic diagram of the bait rack (top view).
[0027] Figure 3 This is a schematic diagram of the propulsion mechanism;
[0028] Figure 4 This is a schematic diagram of the structure of a multi-layered aquaculture trough with a specific trapezoidal tunnel.
[0029] Figure 5 This is a schematic diagram of a bait platform.
[0030] Labeling Explanation: 1-Box body, 2-Feed rack, 3-Feed, 4-Central channel, 5-Multi-layer breeding trough, 6-Side channel, 7-Drain valve, 8-Drain pipe, 9-Grid bracket, 10-Aeration pipe, 11-Bottom channel, 12-Inlet pipe, 13-Inlet valve, 14-Flow propulsion device, 15-Inlet branch pipe, 16-Channel, 17-Inclined plate, 18-Telescopic hook, 19-Feed platform, 20-Grid support plate, 21-Cover plate, 22-Feeding hole. Detailed Implementation
[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Example
[0032] like Figure 1-5 A multi-layer eel farming box includes a square box body 1 and a multi-layer farming tank 5 set inside the box body;
[0033] The bottom of the box is equipped with a drain pipe 8 with a drain valve 7; the top of the box is also equipped with a water inlet pipe 12 with a water inlet valve 13.
[0034] The bait rack is equipped with a bait platform 19 for placing bait 3;
[0035] The feed rack is located above the multi-tiered breeding tank.
[0036] The bottom of the box is equipped with a grid bracket 9, and multi-layer breeding troughs are set on the bracket; a bottom channel for collecting and discharging sewage is formed between the bracket and the bottom of the box, and residual feces sink to the bottom of the tray 11 in a timely manner.
[0037] There are 3 sets of multi-layer aquaculture tanks.
[0038] A central passage 4 is provided between adjacent multi-level aquaculture tanks. A side passage 6 is provided between the multi-level aquaculture tanks and the inner wall of the tank. The side passages and central passages facilitate the entry and exit of eels, allowing them to come out of the passages to ingest food and enter the passages to rest or avoid fighting among eels.
[0039] The grid bracket is fixed with an aeration pipe 10 or an aeration disc, which can increase oxygen when the dissolved oxygen in the water is low, so that the eels can grow healthier.
[0040] The water inlet pipe is located at the bottom of the tank, forming a sewage discharge channel with the water inlet pipe, the drain pipe, and the bottom channel; the outlet end of the water inlet pipe is connected to a flow-driving device. The flow-driving device includes multiple parallel and downward-facing water inlet branch pipes 15, which can generate a flow to increase the sewage discharge performance of the tank when water is being supplied and drained simultaneously.
[0041] The bait rack is a mesh rack. The water inlet branch pipe is duckbill shaped, or uses a similar design. Figure 3 The fish fin shape shown is more effective when pushed.
[0042] Each layer of the multi-layer aquaculture tank has honeycomb-shaped, trapezoidal, or triangular tunnels. Trapezoidal or triangular tunnels are tunnels whose cross-section is trapezoidal or triangular.
[0043] Furthermore, the container has a sloping bottom to facilitate further collection and discharge of wastewater.
[0044] like Figure 2 ,3 and Figure 5 As shown, there are two feed racks (more can be used depending on the actual situation). The feed platform is inverted trapezoidal in shape, wider at the top and narrower at the bottom. Its bottom is a support plate, i.e., feed platform 19, used to hold the feed ball. The four sides are open to facilitate the eels feeding on the feed platform. Above the feed rack is a cover plate 21; the cover plate is wider than the feed platform and has a feeding hole 22. The purpose of the cover plate is to block light, because eels are afraid of light and people. The rest of the top of the breeding tank is covered with a covering material (such as canvas or board) to achieve a light-blocking effect.
[0045] The bait rack is attached to the edge of the box via a telescopic hook. The telescopic hook is used to adjust the height of the feeding mechanism (i.e., the bait rack). The telescopic mechanism is implemented using a sleeve-type structure (similar to the telescopic rod of a telescopic umbrella) or a spring-type structure (the spring will not return to its original state after being stretched or compressed, and can maintain the required length under the action of external force).
[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A multi-layered eel farming tank, characterized by, Includes a box body (1) and a multi-layer breeding tank (5) set inside the box body; The bottom of the box is equipped with a drain pipe (8) with a drain valve (7); the box is also equipped with a water inlet pipe (12) with a water inlet valve (13). The top of the box is equipped with a bait rack (2); The bait rack is equipped with a bait platform (19) for placing bait (3). The feed rack is located above the multi-tiered breeding tank.
2. The multi-layer eel farming tank according to claim 1, characterized in that, The bottom of the box is provided with a grid bracket (9), and the multi-layer breeding tank is set on the grid bracket; a bottom channel (11) for collecting and discharging sewage is formed between the grid bracket and the bottom of the box.
3. The multi-layer eel farming tank according to claim 2, characterized in that, The multi-layer aquaculture tank consists of multiple sets.
4. The multi-layer eel farming tank according to claim 3, characterized in that, A central passage (4) is provided between adjacent multi-layer aquaculture tanks.
5. The multi-layer eel farming tank according to claim 1, wherein, A side passage (6) is provided between the multi-layer breeding tank and the inner wall of the box.
6. The multi-layer eel farming box according to claim 2, characterized in that, An aeration pipe (10) or an aeration disc is fixed on the bracket.
7. The multi-layer eel farming tank according to claim 2, wherein The water inlet pipe is located at the bottom of the tank.
8. The multi-layer eel farming tank according to claim 4, characterized in that, A flow propulsion device is connected to the outlet end of the inlet pipe.
9. The multi-layer eel farming tank according to claim 1, wherein, The bait rack is a mesh rack.
10. The multi-layer eel farming tank according to any one of claims 1-9, characterized in that, Each layer of the multi-layer aquaculture tank has honeycomb-shaped, trapezoidal, or triangular alleyways.
Citation Information
Patent Citations
Eel breeding device and breeding method thereof
CN105660476A
Small eel culture pond
CN220734058U
Split type eel breeding device
CN221554411U