Equipment and system for indoor clean breeding of finless eels

Abstract

The invention relates to the technical field of aquaculture, and discloses equipment and a system for indoor clean culture of ricefield eels, which comprise a temporary culture pond, a first water storage cylinder, a second water storage cylinder, a delivery pump, a centrifugal pump and an oxygenation system. Nozzles are arranged in the temporary rearing pond clockwise at an angle of 45 degrees, rotating water flow is generated to induce the ricefield eels to move reversely, and the water flow speed can be controlled within the range of 0.3-0.8 body length / second; the first water storage cylinder and the second water storage cylinder are respectively used for activating water quality and enhancing nutrition, and the water temperature is maintained at 28-30 DEG C through the heating element and the temperature sensor. The control system realizes automatic regulation and control of water temperature, water flow, dissolved oxygen and water level. The breeding environment is optimized through multi-module collaborative design, and the growth quality and breeding efficiency of ricefield eels are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, specifically to a device and system for indoor rearing of eels. Background Technology

[0002] As an important economic aquatic animal, the aquaculture industry of the swamp eel has developed rapidly in recent years. However, traditional swamp eel farming methods mostly rely on outdoor ponds or natural waters. This method is not only susceptible to external factors such as climate change and environmental pollution, but also suffers from problems such as difficulty in accurately controlling water quality, frequent disease outbreaks, and low farming efficiency. Especially under high-density farming conditions, issues such as dissolved oxygen content, temperature, nutrient distribution, and waste accumulation in the water pose serious threats to the growth and health of swamp eels. In addition, traditional farming methods lack effective water flow control methods and cannot simulate the upstream swimming behavior of swamp eels in their natural environment, resulting in insufficient exercise and consequently affecting muscle quality and growth rate.

[0003] While some equipment and systems exist for aquaculture, they generally suffer from limited functionality, low automation, and complex operation. For example, some devices can only achieve simple water circulation or aeration, but cannot comprehensively regulate water quality, temperature, and flow, making it difficult to meet the refined requirements of indoor eel rearing. Furthermore, existing aquaculture systems often lack intelligent management tools, failing to dynamically adjust environmental parameters based on the eels' physiological characteristics and growth stages. In addition, traditional equipment is relatively weak in water purification and waste treatment, easily leading to water quality deterioration and increasing aquaculture risks.

[0004] Therefore, developing an indoor eel rearing equipment and system capable of precise water quality control, optimized water flow design, and intelligent management has become a pressing technical challenge in the aquaculture industry. This equipment and system needs to possess functions such as efficient water circulation, nutrient enhancement, microecological regulation, and automated control to improve rearing efficiency, ensure eel health, and reduce the cost of manual intervention, thereby promoting the modernization and intelligentization of the eel farming industry. Summary of the Invention

[0005] This invention addresses the problems of inconvenient water quality control, imprecise water flow control, and difficulty in optimizing the breeding environment in existing eel farming techniques. It provides a device and system for indoor eel rearing. Through multi-module collaborative design, the device and system achieve precise control of water quality, water flow, dissolved oxygen, and water temperature, thereby significantly improving the eel's growth environment and increasing farming efficiency.

[0006] This invention provides a device for indoor rearing of swamp eels, comprising a temporary holding tank, a first water storage tank, a second water storage tank, a transfer pump, a centrifugal pump, and an aeration system. Wherein: The temporary holding tank contains a central cylinder, with a ring-shaped pipe at the bottom connecting to multiple vertical pipes, each equipped with a nozzle. These nozzles are arranged at a 45-degree angle and clockwise to create a swirling water flow within the tank. This swirling flow is designed to induce the eels to swim against the current, with the flow velocity set between 0.3 and 0.8 body lengths per second. Furthermore, the tank is equipped with an external discharge valve that also functions as a water level regulator. This valve contains a filter screen to control the water level and filter solid waste during drainage. This structural design allows for simultaneous water renewal and waste treatment, reducing the probability of disease outbreaks.

[0007] Furthermore, both the first and second water storage tanks are equipped with stirring devices, which include a small motor, a rotating rod, and a stirring paddle. The first water storage tank is used to contain microbial preparations to activate the water quality; the second water storage tank is used to contain nutrients to enhance nutrition. Specifically, heating elements and temperature sensors are respectively installed inside the first and second water storage tanks to monitor and control the water temperature, ensuring that the water temperature is maintained within the range of 28-30℃. Through the above structure, the first and second water storage tanks respectively undertake the functions of water quality optimization and nutrient supplementation, providing a basic guarantee for the subsequent entry of water into the temporary holding tank.

[0008] Furthermore, the transfer pump connects to the first and second water storage tanks via inlet and outlet pipes, and is used to transfer water from the first water storage tank to the second water storage tank. The centrifugal pump connects to the second water storage tank and the holding tank via inlet and outlet pipes, and is used to transfer water from the second water storage tank to the holding tank. The synergistic effect of the transfer pump and the centrifugal pump ensures efficient water flow between different modules, while avoiding the risk of water quality deterioration due to stagnation.

[0009] Specifically, the equipment also includes an aeration system to maintain the dissolved oxygen concentration in the holding tank at above 6 mg / L. The introduction of the aeration system avoids stress reactions in the eels caused by hypoxia, providing the necessary conditions for their healthy growth.

[0010] The present invention also provides a system for indoor rearing of swamp eels, including the aforementioned equipment and a control system. The control system is communicatively connected to the stirring device, transfer pump, centrifugal pump, heating element, and temperature sensor in the equipment, and is configured to perform the following control functions: S1 Water Temperature Control: The control system adjusts the working state of the heating element according to the feedback signal from the temperature sensor, so that the water temperature in the first water storage tank, the second water storage tank and the temporary holding tank is maintained within the range of 28-30℃.

[0011] S2 Water Flow Control: The control system maintains the water flow velocity in the holding tank within the range of 0.3-0.8 body lengths / second by adjusting the operating parameters of the centrifugal pump.

[0012] S3 Dissolved Oxygen Control: The control system maintains the dissolved oxygen concentration in the holding tank above 6 mg / L by starting and stopping the oxygenation system.

[0013] S4 Water Level Control: The control system automatically activates the discharge valve at 5-8 hour intervals to replace the pool water.

[0014] S5 Runtime Sequence Control: The control system sets the centrifugal pump's runtime sequence as follows: run for 30 minutes and stop for 30 minutes on the first day; run for 40 minutes and stop for 20 minutes on the second day; and run for 45 minutes and stop for 15 minutes on the third day and thereafter.

[0015] Furthermore, the control system includes a human-machine interface for parameter setting and status display, and supports remote monitoring. Through the human-machine interface, operators can view the equipment's operating status in real time and adjust various parameters, thereby achieving comprehensive management of the breeding process.

[0016] The technical solution of the present invention has the following technical points: Firstly, the 45-degree clockwise arrangement of the nozzles in the holding tank, combined with a controllable water flow speed range, can induce the eels to swim against the current, enhancing their muscle training. Specifically, the adjustable range of water flow speed (0.3-0.8 body length / second) matches the physiological characteristics of the eels, preventing excessive fatigue while effectively promoting their healthy growth.

[0017] Secondly, the tiered treatment design of the first and second water storage tanks achieves the separation and synergy of water quality activation and nutrient enhancement. The microecological preparations in the first water storage tank are thoroughly mixed by the stirring device, which can effectively improve water quality; the nutrients in the second water storage tank are evenly distributed in a similar way, providing necessary nutritional supplements for the eels.

[0018] Furthermore, the introduction of the control system automates the regulation of water temperature, flow, dissolved oxygen, and water level. For example, in terms of water temperature control, the linkage mechanism between the heating element and the temperature sensor ensures that the water temperature is always within a suitable range; in terms of water flow control, the operation sequence design of the centrifugal pump simulates the changing patterns of water flow in the natural environment, which helps to reduce the stress response of the eels.

[0019] Through the above technical solution, the present invention achieves the following technical effects: First, the microecological preparations in the first water tank and the nutrients in the second water tank activated the water quality and enhanced the nutrients, significantly improving the quality of the growth environment for the eels.

[0020] Secondly, the 45-degree clockwise arrangement of the nozzles, combined with the controllable water flow speed range, can induce the eels to swim against the current, enhance their muscle training, and promote healthy growth.

[0021] Third, the introduction of the control system has enabled automated control of water temperature, water flow, dissolved oxygen and water level, reducing the need for manual intervention and improving aquaculture efficiency and stability.

[0022] In summary, this invention provides an efficient, intelligent, and environmentally friendly indoor eel purification and breeding equipment and system, which solves many technical problems existing in the prior art and has significant technical advantages and application prospects. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the temporary holding tank in this invention; Figure 3 This is a front view cross-sectional structural diagram of the first and second water storage tanks in this invention; Figure 4 This is a schematic diagram of the architecture of the control system in this invention; Figure 5 This is a schematic diagram of the control system operation process in this invention; Figure 6 This is a flowchart illustrating the practical application of the present invention.

[0024] The components include: 1. Temporary holding tank; 2. Discharge valve; 3. Bracket; 4. Central cylinder; 5. Circular pipe; 6. Vertical pipe; 7. Nozzle; 8. First water storage tank; 9. Second water storage tank; 10. Small motor; 11. Rotating rod; 12. Agitator; 13. Transfer pump; 14. Transfer inlet pipe; 15. Transfer outlet pipe; 16. Centrifugal pump; 17. Inlet pipe; 18. Water supply pipe. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described 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.

[0026] This invention provides a device and system for indoor breeding of eels, combined with Figures 1 to 6 As shown, the specific implementation method is as follows. The temporary holding tank 1 is the core part of the entire equipment, and its internal structure design fully considers the matching between water flow control and the growth needs of the eels. Figure 2The internal structure of the holding tank 1 is shown. A central cylinder 4 is fixed to a bracket 3, which is located at the center of the holding tank 1. The central cylinder 4 is stabilized during operation through welding or other fixing methods. An annular pipe 5 surrounds the central cylinder 4, and multiple vertical pipes 6 are evenly distributed on the annular pipe 5. Each vertical pipe 6 has a nozzle 7 mounted on its top, arranged at a 45-degree angle clockwise. This arrangement allows the water to form a stable rotating flow within the holding tank 1. This rotating water flow design not only simulates the water flow in the natural environment but also induces the eels to swim against the current, thereby enhancing their muscle training. The water velocity from the nozzles 7 can be adjusted via the operating parameters of the centrifugal pump 16, controlling the water flow velocity within the range of 0.3-0.8 body lengths per second. This range satisfies the eels' need for upstream swimming while avoiding excessive fatigue caused by excessively fast water flow.

[0027] The temporary holding tank 1 is equipped with a discharge valve 2 on the outside, such as Figure 1 As shown, the discharge valve 2 also functions as a water level regulator. It has an embedded filter screen that effectively filters solid waste during drainage, while the water level can be precisely controlled by adjusting the valve opening. The design of discharge valve 2 solves the problem of separating drainage and waste treatment in traditional aquaculture equipment, achieving integrated operation of water renewal and solid-liquid separation. Furthermore, an aeration system is installed at the bottom of the temporary holding tank 1. This system injects air into the tank 1 via an air pump, maintaining a dissolved oxygen concentration above 6 mg / L. The introduction of the aeration system significantly improves the oxygen supply conditions in the temporary holding tank 1, reducing the stress response of eels caused by hypoxia and ensuring their healthy growth.

[0028] The first water storage tank 8 and the second water storage tank 9 are located on the outer sides of the temporary holding tank 1, respectively. Figure 3 As shown, both tanks are equipped with stirring devices, which include a small motor 10, a rotating rod 11, and a stirring paddle 12. The first water tank 8 is mainly used to hold the microecological preparation. The small motor 10 drives the rotating rod 11 to rotate the stirring paddle 12, ensuring that the microecological preparation is fully mixed with the water, completing the water quality activation process. The second water tank 9 is used to hold nutrients. Similarly, the stirring device ensures the uniform distribution of nutrients, providing necessary nutritional supplementation for the subsequent water entering the temporary holding tank 1. To ensure that the water temperature is within a suitable range, heating elements and temperature sensors are installed inside the first water tank 8 and the second water tank 9, respectively. The heating elements automatically adjust their working state based on the signal feedback from the temperature sensor, keeping the water temperature consistently within the range of 28-30℃, a temperature range that meets the optimal growth requirements of the eel.

[0029] The transfer pump 13 is connected to the first water storage tank 8 and the second water storage tank 9 via the inlet pipe 14 and the outlet pipe 15. The function of the transfer pump 13 is to transfer water that has undergone water quality activation from the first water storage tank 8 to the second water storage tank 9 for further addition of nutrients. The centrifugal pump 16 is connected to the second water storage tank 9 and the temporary holding tank 1 via the inlet pipe 17 and the supply pipe 18. The main function of the centrifugal pump 16 is to transport water containing microecological agents and nutrients into the temporary holding tank 1. The transfer pump 13 and the centrifugal pump 16 work together to ensure efficient water flow between different modules, preventing water quality deterioration due to stagnation. Furthermore, the operating parameters of the centrifugal pump 16 can be adjusted as needed to meet the water flow velocity requirements within the temporary holding tank 1.

[0030] like Figure 4 and Figure 5 As shown, the present invention also provides a system for indoor rearing of eels, which includes the aforementioned equipment and a control system. The control system is communicatively connected to the stirring device, transfer pump 13, centrifugal pump 16, heating element, and temperature sensor in the equipment. Parameter setting and status display are achieved through a human-machine interface, and remote monitoring is supported. The operating principle of the control system is as follows: S1 Water Temperature Control: The control system receives feedback signals from the temperature sensors inside the first water storage tank 8, the second water storage tank 9, and the temporary holding tank 1 in real time, and adjusts the working state of the heating element according to the preset value to ensure that the water temperature is maintained within the range of 28-30℃. S2 water flow control: The control system adjusts the operating parameters of centrifugal pump 16 to keep the water flow velocity in the temporary holding tank 1 within the range of 0.3-0.8 body length / second. S3 Dissolved oxygen control: The control system monitors the dissolved oxygen concentration in the temporary holding tank 1. When the concentration is lower than 6 mg / L, the oxygenation system is activated until the dissolved oxygen returns to the set value. S4 water level control: The control system automatically opens the discharge valve 2 at 5-8 hour intervals to replace the pool water and filter solid waste. The S5 runtime sequence control system sets the centrifugal pump 16 to run for 30 minutes and stop for 30 minutes on the first day, run for 40 minutes and stop for 20 minutes on the second day, and run for 45 minutes and stop for 15 minutes on the third day and thereafter. This runtime sequence design simulates the changing patterns of water flow in the natural environment, which helps reduce the stress response of the eels.

[0031] like Figure 6As shown, in practical applications, the equipment and system of this invention can be widely used in factory-scale eel farming. For example, in an indoor farm with an area of ​​100 square meters, multiple holding tanks 1 can be configured, each with a capacity of 1 cubic meter, in conjunction with a first water storage tank 8, a second water storage tank 9, and related pump sets and control systems. Every morning, staff set the operating parameters for the day through a human-machine interface, and then the system automatically executes various control functions. During the water activation stage, the microecological preparation in the first water storage tank 8 is fully mixed by a stirring device and flows into the second water storage tank 9, where it works together with nutrients to form water rich in active substances and nutrients. Subsequently, the centrifugal pump 16 delivers the treated water to the holding tank 1, where it forms a rotating water flow through nozzles 7, inducing the eels to swim against the current. Every 5-8 hours, the discharge valve 2 automatically opens, discharging some wastewater and replenishing fresh water, while filtering out solid waste to ensure the cleanliness of the water in the holding tank 1. Throughout the process, the control system monitors the operating status of each module in real time and transmits the data to the management terminal through remote monitoring, so that staff can keep track of the breeding situation at any time.

[0032] Through the above technical solutions, the equipment and system provided by this invention have achieved significant technical effects in practical applications. The synergistic effect of the microecological preparation in the first water storage tank 8 and the nutrients in the second water storage tank 9 significantly improves water quality, providing an excellent growth environment for the eels. The 45-degree clockwise arrangement of the nozzles 7, combined with a controllable water flow speed range, enhances the muscle training effect of the eels, promoting their healthy growth. The automation function of the control system greatly reduces the need for manual intervention, improving breeding efficiency and stability. In addition, the built-in filter design of the discharge valve 2 simplifies the waste treatment process, reduces the probability of disease occurrence, and provides reliable technical support for factory-scale eel farming.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for indoor rearing of eels, comprising a temporary holding tank (1) and a first water storage tank (8) and a second water storage tank (9) disposed outside the temporary holding tank (1), characterized in that: The first water storage tank (8) and the second water storage tank (9) are respectively equipped with a stirring device, which includes a small motor (10), a rotating rod (11) and a stirring paddle (12). The delivery pump (13) is connected to the first water storage tank (8) and the second water storage tank (9) through the delivery inlet pipe (14) and the delivery outlet pipe (15), and is used to deliver water from the first water storage tank (8) to the second water storage tank (9). A centrifugal pump (16) is connected to the second water storage tank (9) and the temporary holding tank (1) through an inlet pipe (17) and a supply pipe (18) to transport water from the second water storage tank (9) to the temporary holding tank (1). The temporary holding tank (1) is provided with a central cylinder (4) and an annular pipe (5) at the bottom of the temporary holding tank (1). The annular pipe (5) is connected to multiple vertical pipes (6), and each vertical pipe (6) is provided with a nozzle (7). The nozzles (7) are arranged at a 45-degree angle and in a clockwise direction to generate a rotating water flow in the temporary holding tank (1).

2. The device for indoor breeding of eels according to claim 1, characterized in that, The temporary holding tank (1) is equipped with a discharge valve (2) on the outside. The discharge valve (2) also has a water level regulation function. It is equipped with a filter screen inside to control the water level and filter solid waste when draining water.

3. The device for indoor breeding of eels according to claim 1, characterized in that, The first water storage tank (8) is used to contain microecological agents for water quality activation; the second water storage tank (9) is used to contain nutrients for nutrient enhancement; the first water storage tank (8), the second water storage tank (9) and the temporary holding tank (1) are respectively equipped with heating elements and temperature sensors to monitor and control the water temperature inside them.

4. The device for indoor breeding of eels according to claim 1, characterized in that, The annular pipe (5) is arranged around the central cylinder (4), and the vertical pipes (6) are evenly distributed on the annular pipe (5).

5. The device for indoor breeding of eels according to claim 1, characterized in that, The central cylinder (4) is located in the center of the temporary holding tank (1) to guide the water flow to form a centrifugal vortex.

6. The device for indoor breeding of eels according to claim 1, characterized in that, The equipment also includes a bracket (3) fixed in the center of the temporary holding tank (1) to support the central cylinder (4).

7. The device for indoor breeding of eels according to claim 1, characterized in that, The nozzles (7) are arranged to induce the eels to swim against the current, and the water flow speed can be controlled within the range of 0.3-0.8 body length / second; The equipment also includes an oxygenation system for maintaining the dissolved oxygen concentration in the temporary holding tank (1) at or above 6 mg / L.

8. A system for indoor rearing of eels, characterized in that, include: The device as described in any one of claims 1-7; The control system is communicatively connected to the stirring device, delivery pump (13), centrifugal pump (16), heating element, and temperature sensor of the equipment. The control system is configured to perform at least one of the following control functions: Water temperature control: The heating element is controlled to maintain the water temperature in the first water storage tank (8), the second water storage tank (9) and the temporary holding tank (1) at 28-30℃; Water flow control: Control the centrifugal pump (16) to maintain the water flow velocity in the temporary holding tank (1) at 0.3-0.8 body length / second; Timing control: Control the centrifugal pump (16) to operate according to the set timing cycle.

9. A system for indoor rearing of eels according to claim 8, characterized in that, The control system is also configured to perform the following control functions: Dissolved oxygen control: The oxygenation system is controlled to maintain the dissolved oxygen concentration in the temporary holding tank (1) above 6 mg / L; Water level control: Control the discharge valve (2) to automatically replace the pool water at intervals of 5-8 hours; Operation sequence control: The operation sequence of the centrifugal pump (16) is controlled as follows: Day 1: Run for 30 minutes, then stop for 30 minutes; Day 2: Run for 40 minutes, then stop for 20 minutes; Day 3 and thereafter: run for 45 minutes, then stop for 15 minutes.

10. A system for indoor rearing of swamp eels according to claim 8, characterized in that, The control system includes a human-machine interface for parameter setting and status display; and / or the control system supports remote monitoring functions.

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