A mandarin fish fry domestication pool based on a recirculating aquaculture system
By designing a circular pool with a central drainage outlet, combined with a ring-shaped water jet and a fish inlet, the problems of difficult drainage and mechanical damage in the traditional domestication of mandarin fish fry have been solved, achieving efficient water quality management and a high success rate in feeding domestication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU NANSHA FISHERY IND PARK CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-19
AI Technical Summary
In existing mandarin fish fry domestication techniques, traditional square ponds have poor sewage discharge effects, and the dead spots in the water make it difficult to quickly remove uneaten feed and feces, affecting water quality. In addition, frequent manual harvesting operations can easily cause mechanical damage and stress response, making it difficult to establish feeding signals and resulting in low feed utilization.
The circular pool design, combined with a central drain outlet, a ring-shaped water jet, and a fish inlet, enables automatic transfer and water level control. Feeding is stimulated by a surface water flow of 0.2-0.5 m/s. A PP honeycomb board covered with a stainless steel mesh baffle is used to prevent fish from falling, and a three-way valve controls the discharge and replenishment of water.
It enables rapid and targeted removal of uneaten feed and feces, reduces energy consumption in circulating water treatment, avoids mechanical damage and stress response, and improves feeding response rate and domestication success rate.
Smart Images
Figure CN224368776U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of seedling acclimatization pond technology, and in particular to a mandarin fish seedling acclimatization pond based on a recirculating aquaculture system. Background Technology
[0002] In the field of mandarin fish farming, fry domestication is a crucial step determining farming efficiency. Currently, the most commonly used mandarin fish fry domestication techniques in the industry are mainly based on the following methods:
[0003] Traditional square pond acclimatization systems use square breeding ponds made of concrete or PP board (pond volume 5-10m³). 3 The pond bottom is designed with a 3-5° slope, and gravity drainage is achieved through the end drain outlet. The drainage cycle is to manually open the drain valve for 10 minutes every 2 hours, relying on manual observation of the accumulation of uneaten feed at the bottom of the pond. The transfer of fry is completed by catching them with a dip net, which requires 2-3 transfers between ponds. Feeding management adopts the method of feeding live bait fish at fixed time and fixed location, and relying on the sound signal generated by manually tapping the pond wall to establish a feeding conditioned reflex.
[0004] The above solution still has the following problems in practical use:
[0005] Square ponds have hydraulic dead zones, resulting in poor sewage discharge and difficulty in quickly and effectively removing uneaten feed and feces. Large particles that are not discharged in time enter the circulating water treatment equipment; some decompose and dissolve into the water, while others are broken down into smaller particles during treatment, increasing the equipment's processing load and energy consumption. Secondly, in conventional acclimatization processes, fry need to be manually transferred from the initial pond to the acclimatization pond. Frequent manual handling can easily cause mechanical damage to the mandarin fish fry, and environmental changes during the harvesting process can easily cause stress reactions in the fry, affecting survival rates and growth. Furthermore, traditional acclimatization ponds lack effective propulsion and auxiliary feeding systems, making it difficult to quickly remove uneaten feed and establish feeding signals, resulting in low feed utilization and significantly impacting the acclimatization effect of mandarin fish fry. Utility Model Content
[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mandarin fish fry acclimatization pond based on a recirculating aquaculture system, which effectively solves the deficiencies of the prior art.
[0007] The purpose of this utility model is achieved through the following technical solution: a mandarin fish fry acclimatization pond based on a recirculating aquaculture system, comprising a circular pond body, a fish inlet fixedly connected to the top of the side wall of the circular pond body, the fish inlet being connected to an open pond via a pipe, a ring-shaped sprinkler pipe fixedly connected to the upper part of the inner wall of the circular pond body, a spray pump installed on one side of the bottom of the outer wall of the circular pond body, the output end of the spray pump being fixedly connected to and communicating with the input end of the ring-shaped sprinkler pipe, a drain outlet fixedly connected to the center of the bottom of the circular pond body, a water level controller fixedly connected to the top of one side of the outer wall of the circular pond body, the input end of the water level controller being connected to the output end of the drain outlet via a pipe, a drain port fixedly connected to one end of the pipe connecting the water level controller and the drain outlet, a detachable fry-blocking baffle fixedly connected to the middle of the inner wall of the circular pond body, the suction end of the spray pump being connected to the output end of the drain outlet via a pipe, and a return water pipe fixedly connected to the output end of the water level controller.
[0008] Preferably, in any of the above embodiments, the water level controller includes a pluggable water level tube, and the liquid level in the pool is controlled within the range of 60-80cm by adjusting the height of the water level tube. The water level controller includes a connecting water tank and a fixed water level tube, the return water pipe is connected to the inside of the connecting water tank, and the fixed water level tube is inserted into the inside of the return water pipe.
[0009] The technical effects achieved by the above scheme are: water level regulation is achieved by inserting and removing pipes, ensuring that mandarin fish fry are always at the optimal water depth; by inserting fixed water level pipes of different lengths, the overflow height can be changed through the communicating vessel, thus achieving automatic control of the water level.
[0010] Preferably, in any of the above embodiments, the sprinkler pipe is equipped with fan-shaped nozzles spaced 10-15cm apart, and the spray pump can generate a surface water flow of 0.2-0.5m / s.
[0011] The technical effects achieved by adopting the above scheme are: to achieve no dead angle coverage of water flow on the pond surface, to accurately match the flow velocity of 0.2-0.5m / s with the flow-oriented characteristics of mandarin fish fry, and to increase the feeding response rate of fry from 50% to 82% under jet stimulation.
[0012] Preferably, the diameter of the sewage outlet is set to 80-100mm, and the bottom slope of the sewage outlet is an inverted conical structure of 3-5%.
[0013] The technical effects achieved by adopting the above scheme are: increasing the accumulation speed of sedimented waste by 3 times, and ensuring that there is no residue of particles ≥0.5mm with a slope of 3-5%.
[0014] Preferably, in any of the above embodiments, the seedling barrier is made of PP honeycomb board wrapped with stainless steel mesh, and the seedling barrier is detachably installed in the center of the pool via a bottom slot.
[0015] The technical effects achieved by adopting the above solution are as follows: the combination of stainless steel mesh and PP honeycomb board not only prevents the fry from escaping, but also avoids abrasions on the fish. The porosity of the honeycomb board is ≥85%, simulating the natural rock crevice environment, and reducing the fry's hiding stress behavior by 62%.
[0016] Preferably, in any of the above schemes, the sewage outlet is connected to the suction end of the spray pump and the suction end of the water level controller via a three-way valve.
[0017] The technical effect achieved by adopting the above solution is that the water flow from the sewage outlet containing residual bait can be partially returned to the spray pump, realizing the secondary utilization of bait, and the three-way valve can be used to control sewage discharge and water replenishment.
[0018] This utility model has the following advantages:
[0019] 1. This mandarin fish fry acclimatization pond based on a recirculating water system, through its circular pond structure combined with a central drain outlet at the bottom, enables the rapid and directional discharge of pollutants such as uneaten feed and feces, effectively reducing the entry of large particulate pollutants into the recirculating water treatment system and lowering treatment energy consumption.
[0020] 2. This mandarin fish fry acclimatization pond based on a recirculating water system features an innovative fish inlet design that allows mandarin fish fry to be automatically transferred from the initial pond to the acclimatization pond via water flow guidance. This avoids mechanical damage and stress caused by manual harvesting, significantly reducing the fry loss rate.
[0021] 3. This mandarin fish fry acclimatization pond based on a recirculating water system, through a ring-shaped water jet design, simulates a natural feeding environment by stimulating regular water flow, successfully establishing a conditioned reflex feeding mechanism for mandarin fish fry, and increasing the acclimatization success rate to over 85%. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the structure of the water level controller of this utility model.
[0024] In the diagram: 1- Circular pool body, 2- Fish inlet channel, 3- Sprinkler pipe, 4- Sprinkler pump, 5- Drain outlet, 6- Water level controller, 61- Connecting water tank, 62- Fixed water level pipe, 7- Return water pipe, 8- Drain outlet, 9- Seedling barrier. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.
[0026] like Figure 1As shown, a mandarin fish fry acclimatization pond based on a recirculating aquaculture system includes a circular pond body 1. A fish inlet 2 is fixedly connected to the top of the side wall of the circular pond body 1. The fish inlet 2 is connected to an open pond via a pipe. An annular sprinkler pipe is fixedly connected to the upper part of the inner wall of the circular pond body 1. A spray pump 4 is installed on one side of the bottom of the outer wall of the circular pond body 1. The output end of the spray pump 4 is fixedly connected to and communicates with the input end of the annular sprinkler pipe. A drain outlet 5 is fixedly connected to the center of the bottom of the circular pond body 1. A water level controller 6 is fixedly connected to the top of one side of the outer wall of the circular pond body 1. The input end of the water level controller 6 is connected to the output end of the drain outlet 5 via a pipe. One end of the pipe connecting the water level controller 6 and the drain outlet 5 is fixedly connected to an empty outlet 8. A detachable fry-blocking baffle 9 is fixedly connected to the middle of the inner wall of the circular pond body 1. The suction end of the spray pump 4 is connected to the output end of the drain outlet 5 via a pipe. The output end of the water level controller 6 is fixedly connected to a return water pipe 7.
[0027] As an optional technical solution of this utility model: the water level controller 6 includes a pluggable water level tube, which controls the liquid level in the pool within the range of 60-80cm by adjusting the height of the water level tube. The water level is adjusted by plugging and unplugging to ensure that the mandarin fish fry are always at the optimal water depth. The water level controller 6 includes a connecting water tank 61 and a fixed water level tube 62. The return water pipe 7 is connected to the inside of the connecting water tank 61. The fixed water level tube 62 is inserted into the inside of the return water pipe 7. By inserting fixed water level tubes 62 of different lengths, the overflow height can be changed through the connecting tube, thereby realizing automatic control of the water level.
[0028] As an optional technical solution of this utility model: the sprinkler pipe 3 is equipped with fan-shaped nozzles with a spacing of 10-15cm, and the spray pump 4 can generate a surface water flow of 0.2-0.5m / s. The 120° coverage angle of the fan-shaped nozzles, combined with the 10-15cm spacing, achieves no dead angle coverage of the water flow on the pond surface. The 0.2-0.5m / s flow rate is precisely matched with the flow-attracting characteristics of mandarin fish fry, and the feeding response rate of fry under jet stimulation increases from 50% to 82%.
[0029] As an optional technical solution of this utility model: the diameter of the sewage outlet 5 is set to 80-100mm, and the bottom of the sewage outlet 5 has an inverted conical structure with a slope of 3-5%. The inverted conical structure, combined with the 80-100mm pipe diameter, increases the accumulation speed of sedimented sewage by 3 times, and the 3-5% slope ensures that there is no residue of particles ≥0.5mm.
[0030] As an optional technical solution of this utility model: the seedling barrier 9 is composed of PP honeycomb board wrapped with stainless steel mesh. The seedling barrier 9 is detachably installed in the center of the pool through the bottom slot. The combination of stainless steel mesh and PP honeycomb board can prevent seedlings from escaping and avoid fish abrasion. The porosity of the honeycomb board is ≥85%, which simulates the natural rock crevice environment and reduces the seedling hiding stress behavior by 62%.
[0031] As an optional technical solution of this utility model: the sewage outlet 5 is connected to the suction end of the spray pump 4 and the suction end of the water level controller 6 through a three-way valve, so that part of the sewage outlet water containing residual bait is returned to the spray pump 4, realizing the secondary utilization of bait, and the three-way valve is linked to control sewage discharge and water replenishment.
[0032] The working process of this utility model is as follows: When the user uses it...
[0033] 1) Disinfect the inner wall of the circular pool 1 and the movable honeycomb mesh 9 by soaking in a 3% hydrogen peroxide solution for 30 minutes, and then rinse with clean water.
[0034] 2) Insert the water level tube of water level controller 6 and adjust the height to 70cm;
[0035] 3) Open the return water pipe 7 and control the water circulation rate to 3m³. 3 / h, to keep the dissolved oxygen level in the water stable at 6.5-7.2mg / L;
[0036] 4) Open fish inlet 2, start the open pool water pump, and continuously inject water at a flow rate of 0.15m / s for 10 minutes to induce the mandarin fish fry to swim into the acclimatization pool on their own. After the transfer is completed, close the gate to cut off the connection between the two pools and avoid cross-contamination.
[0037] 5) Turn on the spray pump 4 and 3 seconds before each jet starts, put extruded feed with a particle size of 0.5mm into the center of the seedling baffle 9.
[0038] In summary, this invention, through its circular pool structure combined with a central drain outlet at the bottom, enables the rapid and directional discharge of pollutants such as uneaten feed and feces, effectively reducing the entry of large particulate pollutants into the circulating water treatment system and lowering energy consumption. The unique fish inlet design allows mandarin fish fry to be automatically transferred from the initial feeding pool to the acclimatization pool via water flow guidance, avoiding mechanical damage and stress caused by manual harvesting and significantly reducing fry loss. Furthermore, the annular spray jet design, through regular water flow stimulation simulating a natural feeding environment, successfully establishes a conditioned reflex feeding mechanism for mandarin fish fry, increasing the acclimatization success rate to over 85%.
[0039] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A mandarin fish fry acclimatization pond based on a recirculating aquaculture system, characterized in that: The system includes a circular pool (1), with a fish inlet (2) fixedly connected to the top of the side wall of the circular pool (1). The fish inlet (2) is connected to an open pool via a pipe. An annular sprinkler pipe is fixedly connected to the top of the inner wall of the circular pool (1). A spray pump (4) is installed on one side of the bottom of the outer wall of the circular pool (1). The output end of the spray pump (4) is fixedly connected to and communicates with the input end of the annular sprinkler pipe. A drain outlet (5) is fixedly connected to the center of the bottom of the circular pool (1). A water level controller (6) is fixedly connected to the top of one side of the wall. The input end of the water level controller (6) is connected to the output end of the sewage outlet (5) through a pipe. One end of the pipe connecting the water level controller (6) and the sewage outlet (5) is fixedly connected to an air vent (8). A detachable seedling baffle (9) is fixedly connected to the middle of the inner wall of the circular pool (1). The suction end of the spray pump (4) is connected to the output end of the sewage outlet (5) through a pipe. The output end of the water level controller (6) is fixedly connected to a return water pipe (7).
2. The mandarin fish fry domestication tank based on a recirculating aquaculture system according to claim 1, characterized in that: The water level controller (6) includes a pluggable water level tube, which controls the liquid level in the pool to be within the range of 60-80cm by adjusting the height of the water level tube. The water level controller (6) includes a connecting water tank (61) and a fixed water level tube (62). The return water tube (7) is connected to the inside of the connecting water tank (61), and the fixed water level tube (62) is inserted into the inside of the return water tube (7).
3. The mandarin fish fry domestication tank based on a recirculating aquaculture system according to claim 1, characterized in that: The sprinkler pipe (3) is equipped with fan-shaped nozzles spaced 10-15cm apart, and the spray pump (4) can generate surface water flow of 0.2-0.5m / s.
4. The mandarin fish fry domestication tank based on a recirculating aquaculture system according to claim 1, characterized in that: The diameter of the drain outlet (5) is set to 80-100mm, and the bottom slope of the drain outlet (5) is an inverted conical structure of 3-5%.
5. The mandarin fish fry acclimatization pond based on a recirculating aquaculture system according to claim 1, characterized in that: The seedling barrier (9) is made of PP honeycomb board wrapped with stainless steel mesh, and the seedling barrier (9) is detachably installed in the center of the pool through the bottom slot.
6. The mandarin fish fry acclimatization pond based on a recirculating aquaculture system according to claim 1, characterized in that: The drain outlet (5) is connected to the suction end of the spray pump (4) and the suction end of the water level controller (6) through a three-way valve.