Water quality purification device for fish fry breeding
By using a simple water purification device that combines a long storage cylinder for gravel with a fine-mesh filter, along with a circulating water pump and an oxygenation system, the problems of complex structure and high cost of existing devices have been solved, achieving efficient water purification and healthy growth of fish fry.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHIJIANG TENGDA ECOLOGICAL AGRICULTURE DEVELOPMENT CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-04-17
AI Technical Summary
Existing water purification devices for fish fry farming are complex in structure, have high production costs, and are not easy to popularize and promote.
The water purification device adopts a simple structure, including a long sand and gravel storage cylinder, a fine-pore filter screen and a sand and gravel filtration system, combined with a circulating water pump and an oxygen aeration system to achieve water purification and oxygenation.
It achieves efficient water purification, reduces production costs, facilitates widespread adoption, and protects the healthy growth of fish fry.
Smart Images

Figure CN224124997U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fish fry breeding technology, and in particular to a water purification device for fish fry breeding. Background Technology
[0002] Fish fry farming is the process of raising newly hatched fish fry into edible fish or fish fry for release.
[0003] The utility model patent with authorization announcement number CN213623369U discloses a water purification device for aquaculture, including a base, a water tank fixedly installed on one side of the upper surface of the base, a connecting pipe fixedly connected to one side of the water tank, a telescopic rod slidably connected to the inner side of one end of the connecting pipe, the top of the telescopic rod being fixedly connected to one side of the water tank through a horizontal plate, one end of the connecting pipe being fixedly connected to the upper surface of the treatment cylinder, a motor fixedly installed on the upper surface of the treatment cylinder, and a rotating shaft fixedly connected to the lower surface of the motor.
[0004] The water purification device designed in the above patent has an overly complex structure and high production cost, which will increase the production cost of aquaculture and make it difficult to popularize and promote. Therefore, we propose a water purification device for fish fry farming to solve the shortcomings of the above technology. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a water purification device for fish fry farming.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A water purification device for fish fry rearing includes a fish fry rearing tank, with a water purification component installed on the left side of the tank. The water purification component includes a gravel storage cylinder with mounting rings fixedly connected to both ends. Mounting grooves are formed inside the mounting rings, and fine-mesh filter screens are placed inside the mounting grooves. A feeding port is fixedly installed on the upper side of the gravel storage cylinder, and a bottom cone is fixedly installed on the lower side. Both the feeding port and the bottom cone are connected to the interior of the gravel storage cylinder, which is filled with gravel.
[0008] Furthermore, a sealing ring is provided at the end face of the mounting ring.
[0009] By adopting the above technical solution, the sealing ring installed at the end face of the installation ring ensures the sealing of the connection between the two ends of the long sand storage cylinder and prevents water leakage.
[0010] Furthermore, an upper cap is screwed onto the upper side of the feeding port, and a lower cap is screwed onto the lower side of the bottom cone.
[0011] Furthermore, anti-slip grooves are provided on the side walls of both the upper and lower caps.
[0012] By adopting the above technical solution, the anti-slip grooves opened on the side walls of the upper and lower caps improve the surface roughness of the upper and lower caps, and prevent slippage during operation.
[0013] Furthermore, an outlet is provided on the inner side of the fish fry rearing tank, and the outer end of the outlet is screwed to the mounting ring on the right side. A primary filter assembly is installed on the inner side of the outlet.
[0014] Furthermore, the primary filtration assembly includes a support ring, which is fixedly installed on the inner end of the outlet. A connecting cylinder is fixedly connected to the side of the support ring, and a filter plate is fixedly installed on the inner end of the connecting cylinder. Filter holes are evenly distributed on the filter plate.
[0015] By adopting the above technical solution, the filter holes can prevent fish fry from passing through the filter plate, mainly playing the role of filtering fish fry, preventing fish fry from entering the water circulation system, and avoiding damage to the fish fry.
[0016] Furthermore, a circulating water pump is installed on the left side of the fish fry rearing tank, and an upper folding pipe and a lower folding pipe are connected to the circulating water pump. The port of the lower folding pipe is screwed to the mounting ring on the left side.
[0017] Furthermore, a connecting seat is fixedly connected between the circulating water pump and the side wall of the fish fry rearing tank.
[0018] By adopting the above technical solution, the connector provides a supporting connection for the circulating water pump.
[0019] Furthermore, a power switch is fixedly installed on the front side of the fish fry rearing tank.
[0020] Furthermore, the lower end of the upper folding pipe is connected to a pressure equalization water chamber, and several outwardly expanding bends are equidistantly installed on the outer wall of the pressure equalization water chamber, and the outwardly expanding bends are connected to the interior of the pressure equalization water chamber.
[0021] By adopting the above technical solution, the circulating water pump introduces water into the pressure equalization chamber through the upper bend pipe. Under the action of water pressure inside the pressure equalization chamber, the outward expansion bend pipe located on the side of the pressure equalization chamber sprays water into the fish fry rearing tank. This causes water to splash on the water surface inside the fish fry rearing tank, thereby mixing oxygen into the water inside the fish fry rearing tank and achieving an oxygenation effect.
[0022] Compared with related technologies, the water purification device for fish fry farming proposed in this utility model has the following beneficial effects:
[0023] This invention relates to a water purification device for fish fry rearing. The device comprises a water purification component with two sets of fine-pore filters. These filters enclose the sand and gravel stored inside a long storage cylinder. Water circulating from the fish fry rearing tank is filtered through these two layers of fine-pore filters. Simultaneously, smaller, harder-to-filter impurities in the water are adsorbed and filtered out by the sand and gravel. This invention features a simple water purification component with a three-layer filtration system consisting of two sets of fine-pore filters and sand and gravel. This provides effective purification of the water in the fish fry rearing tank. Furthermore, the device has low manufacturing costs, is easy to popularize and promote, and is highly practical. Attached Figure Description
[0024] Figure 1 This is a three-dimensional structural diagram of a water purification device for fish fry rearing proposed in this utility model. Figure 1 ;
[0025] Figure 2 This is a three-dimensional structural diagram of a water purification device for fish fry rearing proposed in this utility model. Figure 2 ;
[0026] Figure 3 This is a three-dimensional structural diagram of a water purification device for fish fry rearing proposed in this utility model. Figure 3 ;
[0027] Figure 4 This is a three-dimensional structural diagram of the primary filter assembly;
[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of a water purification component;
[0029] Figure 6 Schematic diagram of the three-dimensional disassembled structure of the water purification component Figure 1 ;
[0030] Figure 7 Schematic diagram of the three-dimensional disassembled structure of the water purification component Figure 2 .
[0031] In the diagram: 1. Fish fry rearing tank; 2. Circulating water pump; 3. Upper folding pipe; 4. Lower folding pipe; 5. Pressure equalizing water chamber; 6. Outwardly expanding bend pipe; 7. Water purification component; 71. Gravel storage cylinder; 72. Mounting ring; 73. Sealing ring; 74. Mounting groove; 75. Fine-pore filter screen; 76. Feed inlet; 77. Upper cap; 78. Bottom cone; 79. Lower cap; 8. Primary filter component; 81. Support ring; 82. Connecting cylinder; 83. Filter plate; 9. Connecting seat; 10. Power switch. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0033] Reference Figure 1-7 A water purification device for fish fry rearing includes a fish fry rearing tank 1, with a water purification component 7 arranged on the left side of the fish fry rearing tank 1; the water purification component 7 includes a gravel storage cylinder 71, with mounting rings 72 fixedly connected to both ends of the gravel storage cylinder 71, and mounting grooves 74 opened on the inner side of the mounting rings 72, with fine-pore filter screens 75 placed inside the mounting grooves 74, a feeding port 76 fixedly installed on the upper side of the gravel storage cylinder 71, and a bottom cone 78 fixedly installed on the lower side of the gravel storage cylinder 71, with the feeding port 76 and the bottom cone 78 both communicating with the inside of the gravel storage cylinder 71, and the inside of the gravel storage cylinder 71 being filled with gravel.
[0034] In this embodiment, a circulating water pump 2 is provided on the left side of the fish fry rearing tank 1. An upper folding pipe 3 and a lower folding pipe 4 are connected and installed on the circulating water pump 2. The port of the lower folding pipe 4 is screwed to the left side mounting ring 72. A connecting seat 9 is fixedly connected between the circulating water pump 2 and the side wall of the fish fry rearing tank 1.
[0035] Through the above structure, the connecting seat 9 provides support for the circulating water pump 2.
[0036] In this embodiment, the lower end of the upper folding pipe 3 is connected to the pressure equalization water chamber 5, and several outwardly expanding bends 6 are equidistantly installed on the outer wall of the pressure equalization water chamber 5. The outwardly expanding bends 6 are connected to the inside of the pressure equalization water chamber 5.
[0037] With the above structure, when the circulating water pump 2 introduces water into the pressure equalization chamber 5 through the upper bend pipe 3, the subsequent water flow sprays water into the fish fry rearing tank 1 through the outward expansion bend pipe 6 on the side of the pressure equalization chamber 5. At the same time as the water is sprayed, oxygen from the air is brought into the water and mixed into the water, thereby increasing the oxygen content of the water in the fish fry rearing tank 1, which is conducive to the growth of fish fry.
[0038] In this embodiment, a sealing ring 73 is provided at the end face of the mounting ring 72.
[0039] Through the above structure, the sealing ring 73 ensures that the connection between the two ends of the gravel storage cylinder 71 remains sealed, preventing water leakage.
[0040] In this embodiment, an upper cap 77 is screwed onto the upper side of the feeding port 76, and a lower cap 79 is screwed onto the lower side of the bottom cone 78. Anti-slip grooves are provided on the side walls of both the upper cap 77 and the lower cap 79.
[0041] With the above structure, anti-slip grooves are provided on the side walls of both the upper cap 77 and the lower cap 79, so that slippage will not occur during daily operation.
[0042] In this embodiment, a water outlet is provided on the inner side of the fish fry rearing tank 1. The outer end of the water outlet is screwed to the right mounting ring 72. A primary filter assembly 8 is installed on the inner side of the water outlet. The primary filter assembly 8 includes a support ring 81, which is fixedly installed on the inner end of the water outlet. A connecting cylinder 82 is fixedly connected to the side of the support ring 81. A filter plate 83 is fixedly installed on the inner end of the connecting cylinder 82. Filter holes are evenly distributed on the filter plate 83.
[0043] Through the above structure, the filter holes can prevent fish fry from passing through the filter plate 83, mainly playing the role of filtering fish fry, preventing fish fry from entering the water circulation system, and avoiding damage to the fish fry.
[0044] In this embodiment, a power switch 10 is fixedly installed on the front side of the fish fry rearing tank 1.
[0045] With the above structure, the power switch 10 is used to control the working state of the circulating water pump 2.
[0046] In this invention, during use, the circulating water pump 2 is started, allowing water to flow through the filter plate 83 into the outlet of the fish fry rearing tank 1. The water then passes through the fine-mesh filter 75 on the left, the gaps between the gravel in the gravel storage cylinder 71, and the fine-mesh filter 75 on the right. The water passes through these two layers of fine-mesh filters 75, removing most impurities. Impurities that are difficult to remove are adsorbed by the gravel as they pass through the gaps. This combined filtration by the two layers of fine-mesh filters 75 and the gravel effectively purifies the water. The water then flows sequentially through the lower bend pipe 4, the working chamber of the circulating water pump 2, the upper bend pipe 3, and the pressure equalization chamber 5. Finally, it is sprayed onto the inside of the fish fry rearing tank 1 through the outward-expanding bend pipe 6, thus realizing a water circulation system. Simultaneously, the spraying action increases the oxygen content of the water inside the fish fry rearing tank 1, which is beneficial for fish fry rearing production.
[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A water purification device for fish fry rearing, characterized in that, Includes a fish fry rearing tank (1), and a water purification component (7) is provided on the left side of the fish fry rearing tank (1); The water purification component (7) includes a gravel storage cylinder (71), with mounting rings (72) fixedly connected to both ends of the gravel storage cylinder (71). An installation groove (74) is provided on the inner side of the mounting ring (72), and a fine-pore filter screen (75) is placed inside the installation groove (74). A feeding port (76) is fixedly installed on the upper side of the gravel storage cylinder (71), and a bottom cone (78) is fixedly installed on the lower side of the gravel storage cylinder (71). The feeding port (76) and the bottom cone (78) are both connected to the inside of the gravel storage cylinder (71), and the inside of the gravel storage cylinder (71) is filled with gravel.
2. The water purifying apparatus for fish larvae according to claim 1, wherein A sealing ring (73) is provided at the end face of the mounting ring (72).
3. The water purifying apparatus for fish larvae according to claim 1, wherein The upper cap (77) is screwed onto the upper side of the feeding port (76), and the lower cap (79) is screwed onto the lower side of the bottom cone (78).
4. The water purifying apparatus for fish larvae according to claim 3, wherein Anti-slip grooves are provided on the side walls of both the upper cap (77) and the lower cap (79).
5. The water purifying apparatus for fish breeding according to claim 1, wherein The fish fry rearing tank (1) has an outlet on its inner side. The outer end of the outlet is screwed to the mounting ring (72) on the right side. A primary filter assembly (8) is installed on the inner side of the outlet.
6. The water purifying apparatus for fish larvae according to claim 5, wherein The primary filtration assembly (8) includes a support ring (81), which is fixedly installed on the inner end of the outlet. A connecting cylinder (82) is fixedly connected to the side of the support ring (81), and a filter plate (83) is fixedly installed on the inner end of the connecting cylinder (82). Filter holes are evenly distributed on the filter plate (83).
7. The water purifying apparatus for fish breeding according to claim 1, wherein A circulating water pump (2) is installed on the left side of the fish fry breeding tank (1). An upper folding pipe (3) and a lower folding pipe (4) are connected to the circulating water pump (2). The port of the lower folding pipe (4) is screwed to the mounting ring (72) on the left side.
8. The water purifying apparatus for fish larvae according to claim 7, wherein A connecting seat (9) is fixedly connected between the circulating water pump (2) and the side wall of the fish fry rearing tank (1).
9. The water purifying apparatus for fish larvae according to claim 1, wherein A power switch (10) is fixedly installed on the front side of the fish fry rearing tank (1).
10. The water purifying apparatus for fish larvae according to claim 7, wherein The lower end of the upper folding pipe (3) is connected to the pressure equalization water chamber (5). Several outwardly expanding bends (6) are installed equidistantly on the outer wall of the pressure equalization water chamber (5). The outwardly expanding bends (6) are connected to the inside of the pressure equalization water chamber (5).
Citation Information
Patent Citations
Water quality purification device for aquaculture
CN213623369U