Fishpond

Abstract

The utility model relates to a fishpond which comprises a pond body, and the pond body comprises a base and an inner tank arranged on the base. The water inlet end of the water inlet assembly is connected with an external water tank, and the water outlet end extends into the inner cylinder; the sewage cleaning assembly comprises a surface sewage cleaning device and a central sewage suction device, and the central sewage suction device comprises a Venturi tube, a central sewage suction tube, a sewage suction water supply tube and a sewage suction drainage tube; the drainage assembly comprises a central drainage assembly arranged at the bottom of the inner cylinder, a side drainage assembly arranged on the side wall of the inner cylinder and a main drainage pipe arranged outside the base, the main drainage pipe is connected with the central drainage assembly and the side drainage assembly, and the central drainage assembly penetrates through the bottom of the inner cylinder to enter the containing space and extends out of the side wall of the base to be connected with the main drainage pipe. The structure that the inner cylinder and the base are stacked is adopted, the pipeline is fixed and connected through the base, the underground space is prevented from being occupied, the pool body, the water inlet assembly, the sewage disposal assembly and the water drainage assembly jointly form a whole, moving and carrying are convenient, and the application range can be widened.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, and in particular to a fish pond. Background Technology

[0002] Recirculating aquaculture systems (RAS), as a modern intensive aquaculture model, possess advantages such as high stocking density, no seasonal limitations, water and land conservation, and controllable environment. Currently, in factory-style aquaculture, the system typically includes stocking ponds, biological tanks, circulating pumps, and pipelines. The inlet and outlet water to the stocking ponds are transported through pipelines, which are characterized by relatively large transport capacity; depending on the pipe diameter, the transport capacity can reach 1000 m³ / s. 3 / h. Existing technologies typically use metal pipes to transport water, but these pipes occupy a significant amount of space.

[0003] While it is possible to bury metal pipes underground at the location of the aquaculture pond to reduce the area occupied, burying metal pipes requires a lot of manpower, which increases the overall manufacturing cost. At the same time, if the metal pipes are buried underground, the location of the aquaculture pond is fixed and cannot be moved, which limits its use. In addition, most existing aquaculture ponds use a liquid pump structure to remove impurities located at the bottom of the pond, resulting in high noise and high cost.

[0004] Therefore, there is a need for a fishpond that can reduce the overall footprint, is easy to move and transport, has a wide range of applications, and also avoids the use of a liquid pump, reducing noise and saving costs. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a fish pond.

[0006] The technical solution of this utility model is as follows:

[0007] A fish pond, comprising:

[0008] The pool body includes a base and an inner cylinder disposed on the base. The base has a built-in receiving space, and the top of the inner cylinder is open.

[0009] A water inlet assembly, wherein the water inlet end of the water inlet assembly is connected to an external water tank, and the water outlet end of the water inlet assembly extends into the inner cylinder;

[0010] A cleaning assembly is disposed on the side wall of the inner cylinder. The cleaning assembly includes a surface cleaning device for cleaning oil stains on the water surface and a central suction device for cleaning sediment at the bottom. The central suction device includes a Venturi tube, a central suction pipe, a suction water supply pipe, and a suction drain pipe. The first end of the suction water supply pipe is connected to the external water tank, the second end of the suction water supply pipe is connected to the water inlet of the Venturi tube, the first end of the suction drain pipe is connected to the water outlet of the Venturi tube, the first end of the central suction pipe extends into the bottom of the inner cylinder, and the second end of the central suction pipe is connected to the vacuum end of the Venturi tube.

[0011] The drainage assembly includes a central drainage assembly disposed at the bottom of the inner cylinder, a side drainage assembly disposed on the side wall of the inner cylinder, and a main drainage pipe disposed outside the base. The main drainage pipe is connected to both the central drainage assembly and the side drainage assembly. The bottom end of the central drainage assembly passes through the bottom of the inner cylinder into the receiving space and extends out from the side wall of the base to connect to the main drainage pipe.

[0012] As a further improvement of this utility model, the water inlet assembly includes a water inlet fixing bracket disposed on the outer side wall of the inner cylinder and a water inlet connecting pipe disposed on the water inlet fixing bracket. The first end of the water inlet connecting pipe is connected to the external water tank, and the second end of the water inlet connecting pipe is connected to the water inlet pipe. The water inlet pipe extends into the inner cylinder.

[0013] As a further improvement of this utility model, the water inlet pipe includes an inner water inlet pipe whose top is connected to the water inlet connecting pipe and an outer water inlet pipe sleeved outside the inner water inlet pipe. A gap is provided between the outer water inlet pipe and the inner water inlet pipe. The bottom of the outer water inlet pipe is sealed, and the top of the outer water inlet pipe is sealed between the inner water inlet pipe and the inner water inlet pipe. The inner water inlet pipe is provided with a plurality of first water inlet holes, and the outer water inlet pipe is provided with a plurality of second water inlet holes.

[0014] As a further improvement of this utility model, the inner cylinder is provided with a cleaning through hole on its side wall. The surface cleaning device includes a connecting part passing through the cleaning through hole, a cleaning part provided at the first end of the connecting part, and a draining part provided at the second end of the connecting part. The cleaning part is provided inside the inner cylinder, and the draining part is provided outside the inner cylinder and connected to the main drain pipe. The cleaning part is provided with at least one cleaning hole.

[0015] As a further improvement of this utility model, the first end of the connecting part is connected to the middle part of the cleaning part, both ends of the cleaning part are sealed, and a plurality of cleaning holes are provided on the side wall of the cleaning part, and the plurality of cleaning holes are arranged in a third array.

[0016] As a further improvement of this utility model, the bottom of the inner cylinder is provided with a bottom drain hole, and the central drainage assembly includes a drain connecting pipe disposed in the base. The first end of the drain connecting pipe covers and communicates with the bottom drain hole, and the second end of the drain connecting pipe extends out of the side wall of the base and is connected to the main drain pipe. A drain liquid retaining component is provided between the drain connecting pipe and the main drain pipe. The drain liquid retaining component includes a drain inlet located at the bottom and a drain outlet located at the top. The drain inlet communicates with the drain connecting pipe, and the drain outlet is connected to the main drain pipe.

[0017] As a further improvement of this utility model, the central drainage assembly includes a central drainage pipe disposed in the inner cylinder, one end of the central drainage pipe being inserted into the bottom drainage hole, and the side wall of the central drainage pipe being provided with a plurality of mesh holes.

[0018] As a further improvement of this utility model, the drainage and liquid retention component includes a drainage outer sleeve communicating with the drainage connecting pipe and a drainage inner sleeve passing through the drainage outer sleeve. A drainage channel is provided between the drainage inner sleeve and the drainage outer sleeve. The bottom end of the drainage outer sleeve is sealed to the side wall of the drainage inner sleeve. The drainage outlet is located at the top of the drainage inner sleeve. The bottom of the drainage inner sleeve is communicating with the main drainage pipe. The drainage outlet is lower than the top end of the drainage outer sleeve.

[0019] As a further improvement of this utility model, the side drainage assembly includes a side drainage box disposed on the outer side wall of the inner cylinder, a side drainage hole provided on the side wall of the pool body, the side drainage hole communicating with the side drainage box, and the side drainage box being connected in sequence to a side drainage pipe and a main drainage pipe.

[0020] As a further improvement of this utility model, the inner cylinder has a movable drainage baffle on its side wall, which covers the side drainage hole.

[0021] According to the above-described solution, the beneficial effects of this utility model are as follows:

[0022] 1. This utility model adopts a structure in which the inner cylinder and the base are stacked. The relevant pipelines of the drainage component are fixed and interconnected through the base, avoiding the occupation of underground space. The pool body, water inlet component, cleaning component and drainage component are integrated into a whole, which is convenient for movement and transportation and can improve the scope of application.

[0023] 2. The central suction device of this utility model replaces the water pump with the Venturi effect, which can effectively reduce the overall operating cost and avoid the noise generated by the water pump, further meeting the needs of fish fry breeding.

[0024] 3. This utility model adopts a nested inner and outer pipe water inlet structure. Water flows through the inner water inlet pipe into the outer water inlet pipe, and then into the pool body through the outer water inlet pipe. This ensures that the water inlet flow rate of each second water inlet hole on the outer water inlet pipe is the same and the water outlet is stable, achieving uniform water supply and meeting the growth environment of fish fry.

[0025] 4. This utility model adopts a structure that combines a surface cleaning device and a central cleaning device, which can clean the bottom of the inner cylinder and the water surface at the same time, effectively reducing oil and impurities in the pool and improving the water quality of the pool.

[0026] 5. The cleaning component of this utility model is set outside the inner cylinder, with only the central suction pipe extending into the inner cylinder. This not only avoids occupying the volume of the inner cylinder and improves the volume utilization rate of the inner cylinder, but also avoids contact with the fish fry, thus avoiding unnecessary impact on the fish fry breeding and improving breeding efficiency.

[0027] 6. This utility model can control and adjust the water level in the inner tank through the drainage and liquid retention component, which can prevent the water in the breeding pond from being drained after the system is powered off, avoid the risk of fish death in the breeding pond, and improve the overall reliability and stability.

[0028] 7. This utility model, through the central drainage pipe with mesh on the surface, can block the fish fry during the drainage process, preventing the fish fry from being discharged with the water flow from the bottom drainage hole, effectively isolating and restricting the fish fry, and further improving the overall reliability.

[0029] 8. By setting up a side drainage box and a side drainage pipe, this utility model can improve the overall drainage efficiency. When the water level in the inner cylinder exceeds the side drainage hole, it will automatically enter the side drainage box and be discharged, realizing automatic adjustment of water level and automatic drainage. It can maintain the water volume in the inner cylinder and avoid the risk of water overflow, and it does not require staff intervention to control, thus reducing labor costs. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of the present invention from a first angle;

[0031] Figure 2 This is a structural schematic diagram of the present invention from a second angle;

[0032] Figure 3 This is a structural schematic diagram of the water inlet component of this utility model from a first angle;

[0033] Figure 4 This is a structural schematic diagram of the water inlet component of this utility model from a second angle;

[0034] Figure 5 This is a structural schematic diagram of the water inlet pipe of this utility model from the first angle;

[0035] Figure 6 This is a structural schematic diagram of the water inlet pipe at the second angle of this utility model;

[0036] Figure 7 This is a schematic diagram of the structure of the water inlet inner pipe of this utility model;

[0037] Figure 8 This is a schematic diagram of the structure of the water inlet outer pipe of this utility model;

[0038] Figure 9 This is a structural schematic diagram of the cleaning component of this utility model from a first angle;

[0039] Figure 10 This is a structural schematic diagram of the cleaning component of this utility model from a second angle;

[0040] Figure 11 This is a schematic diagram of the structure of the first embodiment of the surface cleaning device of this utility model;

[0041] Figure 12 This is a schematic diagram of the structure of the second embodiment of the surface cleaning device of this utility model;

[0042] Figure 13 This is a schematic diagram of the third embodiment of the surface cleaning device of this utility model;

[0043] Figure 14 This is a schematic diagram of the structure of the suction box of this utility model;

[0044] Figure 15 This is a structural schematic diagram of the central drainage component of this utility model from a first angle;

[0045] Figure 16 This is a structural schematic diagram of the central drainage component of this utility model from a second angle;

[0046] Figure 17 This is a schematic diagram of the structure of the first embodiment of the drainage and liquid retention component of this utility model;

[0047] Figure 18 This is a schematic diagram of the structure of the second embodiment of the drainage and liquid retention component of this utility model;

[0048] Figure 19 This is a schematic diagram of the structure of the first embodiment of the side drainage component of this utility model;

[0049] Figure 20 This is a schematic diagram of the structure of the second embodiment of the side drainage component of this utility model;

[0050] Figure 21 This is a structural schematic diagram of the third embodiment of the side drainage component of this utility model from the first angle;

[0051] Figure 22 This is a structural schematic diagram of the second angle of the third embodiment of the side drainage component of this utility model.

[0052] In the diagram: 1. Base; 2. Inner cylinder; 21. Bottom drain hole; 3. Water inlet assembly; 31. Water inlet bracket; 32. Water inlet connecting pipe; 33. External water tank; 34. Inner water inlet pipe; 35. Outer water inlet pipe; 36. First water inlet hole; 37. Second water inlet hole; 4. Surface cleaning device; 41. Connecting part; 42. Cleaning part; 43. Drainage part; 44. Cleaning hole; 45. Cleaning connecting hose; 46. Buoyancy component; 5. Central cleaning device; 51. Venturi tube; 52. Central suction pipe; 53. Suction water supply pipe; 54. Suction drain pipe; 5 5. Sewage suction outlet; 56. Sewage suction box; 57. Mesh plate; 58. Sediment separator; 6. Central drainage assembly; 61. Drainage connection pipe; 62. Drainage inlet; 63. Drainage outlet; 64. Central drainage pipe; 641. Mesh; 65. Drainage outer sleeve; 66. Drainage inner sleeve; 661. Handle; 67. Drainage channel; 68. Drainage box; 681. Quick drain outlet; 7. Side drainage assembly; 71. Side drainage box; 72. Side drainage hole; 73. Side drainage pipe; 74. Drainage baffle; 75. Filter screen; 8. Main drain pipe. Detailed Implementation

[0053] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0054] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0056] See Figure 1 and Figure 2 This utility model provides a fish pond, comprising:

[0057] The pool body includes a base 1 and an inner cylinder 2 set on the base 1. The base 1 has a built-in receiving space, and the top of the inner cylinder 2 is open.

[0058] Water inlet assembly 3, the water inlet end of water inlet assembly 3 is connected to external water tank 33, and the water outlet end of water inlet assembly 3 extends into inner cylinder 2;

[0059] The cleaning assembly is located on the side wall of the inner cylinder 2. The cleaning assembly includes a surface cleaning device 4 for cleaning oil stains on the water surface and a central suction device 5 for cleaning sediment at the bottom. The central suction device 5 includes a Venturi tube 51, a central suction pipe 52, a suction water supply pipe 53, and a suction drain pipe 54. The first end of the suction water supply pipe 53 is connected to the external water tank 33, and the second end of the suction water supply pipe 53 is connected to the water inlet end of the Venturi tube 51. The first end of the suction drain pipe 54 is connected to the water outlet end of the Venturi tube 51. The first end of the central suction pipe 52 extends into the bottom of the inner cylinder 2, and the second end of the central suction pipe 52 is connected to the vacuum end of the Venturi tube 51.

[0060] The drainage assembly includes a central drainage assembly 6 located at the bottom of the inner cylinder 2, a side drainage assembly 7 located on the side wall of the inner cylinder 2, and a main drainage pipe 8 located outside the base 1. The main drainage pipe 8 is connected to both the central drainage assembly 6 and the side drainage assembly 7. The bottom end of the central drainage assembly 6 passes through the bottom of the inner cylinder 2 into the receiving space and extends out from the side wall of the base 1 to connect to the main drainage pipe 8.

[0061] This invention provides water inlet and drainage to the inner tank 2 through the water inlet component 3 and the drainage component, respectively, while allowing the water in the inner tank 2 to circulate. This prevents oil, impurities, and other contaminants from accumulating in the inner tank 2 over a long period, ensuring clean and tidy water and providing a good breeding environment for fish fry. Furthermore, this invention adopts a stacked structure of the inner tank 2 and the base 1, with the relevant pipelines of the drainage component fixed and interconnected through the base 1, avoiding the occupation of underground space. The tank body, water inlet component 3, cleaning component, and drainage component form a whole, facilitating movement and transportation and expanding its applicability. At the same time, the central suction device 5 of this invention replaces the water pump with the Venturi effect, which can effectively reduce the overall operating cost and avoid the noise generated by the water pump, further meeting the breeding needs of fish fry.

[0062] See Figure 3-8. As one embodiment of this utility model, the water inlet assembly 3 includes a water inlet fixing bracket 31 disposed on the outer wall of the inner cylinder 2 and a water inlet connecting pipe 32 disposed on the water inlet fixing bracket 31. The first end of the water inlet connecting pipe 32 is connected to an external water tank 33, and the second end of the water inlet connecting pipe 32 is connected to a water inlet pipe. The water inlet pipe extends into the inner cylinder 2. Preferably, the water inlet fixing bracket 31 is fixedly connected to the side wall of the inner cylinder 2 by a stainless steel clamp. The angle between the water inlet fixing bracket 31 and the side wall of the inner cylinder 2 is adjustable. The water inlet pipe includes an inlet pipe whose top is connected to the water inlet connecting pipe 32. The system includes an inner water inlet pipe 34 and an outer water inlet pipe 35 fitted over the inner water inlet pipe 34. A gap exists between the outer water inlet pipe 35 and the inner water inlet pipe 34. Preferably, the inner water inlet pipe 34 is made of 304 stainless steel, and the outer water inlet pipe 35 is made of thickened engineering plastic. The bottom of the outer water inlet pipe 35 is sealed, and the top of the outer water inlet pipe 35 is sealed to the inner water inlet pipe 34. Preferably, the bottom of the outer water inlet pipe 35 is completely sealed using argon arc welding, and the top of the outer water inlet pipe 35 is radially sealed to the end face or side wall of the inner water inlet pipe 34 using a silicone sealing ring. To prevent water leakage from both ends of the outer inlet pipe 35 and improve stability, the inner inlet pipe 34 is provided with several first inlet holes 36, and the outer inlet pipe 35 is provided with several second inlet holes 37. Water flows from the external water tank 33 through the inlet connecting pipe 32 and the inner inlet pipe 34, and enters the outer inlet pipe 35 through the first inlet holes 36. A stable laminar flow is formed in the outer inlet pipe 35, eliminating turbulence, and finally, the water is injected into the inner cylinder 2 through the second inlet holes 37, completing the water supply to the inner cylinder 2. This utility model adopts a nested inner and outer pipe design. The water inlet structure, through the cooperation of the inner water inlet pipe 34 and the outer water inlet pipe 35, can maintain a constant water pressure when water level fluctuations occur due to the buffering effect of the outer water inlet pipe 35. In addition, the bottom sealing structure of the outer water inlet pipe 35 forms a secondary water distribution chamber, ensuring that the water flow entering the inner cylinder 2 is distributed in a fan shape. This ensures that the water flow rate of each second water inlet hole 37 on the outer water inlet pipe 35 is the same and the water output is stable, achieving uniform water supply. Compared with the traditional direct-flow water inlet device, this water inlet structure improves the uniformity of dissolved oxygen distribution by 40%, which meets the growth environment of fish fry.

[0063] As an embodiment of this utility model, the bottom of the inner water inlet pipe 34 is sealed to prevent the bottom of the inner water inlet pipe 34 from communicating with the outer water inlet pipe 35, and to ensure that the water flow enters the outer water inlet pipe 35 from the side wall of the inner water inlet pipe 34. This forms a stable water flow in the outer water inlet pipe 35, thereby eliminating turbulence. It also prevents the water pressure at the bottom of the outer water inlet pipe 35 from being too high, which would cause the water inlet speed in the second water inlet hole 37 near the bottom to be too fast. This ensures that the water inlet speed of each second water inlet hole 37 is the same, and achieves uniform water supply.

[0064] As one embodiment of this utility model, the radius of the first water inlet hole 36 is smaller than the radius of the second water inlet hole 37. According to the principle of fluid mechanics, when water flows from the inner water inlet pipe 34 into the outer water inlet pipe 35, a higher velocity gradient will be formed under the same flow conditions due to the smaller cross-sectional area of ​​the first water inlet hole 36. When water flows from the outer water inlet pipe 35 into the inner cylinder 2, the enlarged cross-section of the second water inlet hole 37 effectively reduces the velocity, thereby making the velocity of water flowing from the inner water inlet pipe 34 into the outer water inlet pipe 35 greater than the velocity of water flowing from the outer water inlet pipe 35 into the inner cylinder 2. This differentiated aperture configuration creates a certain difference in the water flow velocity between the inner water inlet pipe 34 and the outer water inlet pipe 35, which not only ensures the conveying efficiency of the inner water inlet pipe 34, but also achieves stable water distribution through the buffer of the outer water inlet pipe 35, avoiding turbulent disturbances inside the inner cylinder 2, and improving the overall stability and reliability of water intake.

[0065] As one embodiment of this utility model, the first water inlet hole 36 is arranged in a first array along the axial direction of the inner water inlet pipe 34, and the second water inlet hole 37 is arranged in a second array along the axial direction of the outer water inlet pipe 35. The first water inlet hole 36 and the second water inlet hole 37 are staggered. After the water flows into the outer water inlet pipe 35 from the first water inlet hole 36, it is guided by the outer water inlet pipe 35 and finally enters the inner cylinder 2 from the second water inlet hole 37. The first water inlet hole 36 and the second water inlet hole 37 are both arranged in an array, so that the first water inlet hole 36 and the second water inlet hole 37 are evenly distributed. This can effectively improve the water inlet uniformity of the outer water inlet pipe 35 and enhance the turbulence intensity of the internal flow field of the outer water inlet pipe 35. At the same time, the three-dimensional distribution of the water inlet path is realized through the layered flow guiding design of the inner and outer pipes.

[0066] In one embodiment of this utility model, the circumferential area between the two edges of the second array is A, and the lateral area of ​​the water inlet pipe 35 is B, where A ≤ 0.25B. Taking the water inlet pipe 35 as a circular pipe as an example, the angle corresponding to the distribution range of the second array is within 90°. Taking the axial direction along the water inlet pipe 35 as the column and the circumferential direction of the water inlet pipe 35 as the row, when the second array has only one column, the circumferential area bounded by the left and right ends of the second water inlet hole 37 is A, that is, the angle between the line connecting the left and right ends of the second water inlet hole 37 and the center of the water inlet pipe 35 is within 90°. When the second array has two columns, the circumferential area bounded by the leftmost end of the second water inlet hole 37 on the left and the rightmost end of the second water inlet hole 37 on the right is A. Let A be the angle between the leftmost end of the second water inlet 37 on the left and the rightmost end of the second water inlet 37 on the right, and the center of the outer water inlet pipe 35. Similarly, when the second array has more than two columns, the circumferential area bounded by the leftmost end of the second water inlet 37 on the left and the rightmost end of the second water inlet 37 on the right is A. That is, the angle between the leftmost end of the second water inlet 37 on the left and the rightmost end of the second water inlet 37 on the right, and the center of the outer water inlet pipe 35 is within 90°. This can avoid the water inlet angle of the outer water inlet pipe 35 being too large and the water inlet direction being too dispersed, thereby providing a stable water flow direction to the inner cylinder 2 and improving the overall stability and reliability.

[0067] In one embodiment of this utility model, the circumferential area between the two edges of the first array is C, and the lateral area of ​​the water inlet pipe 34 is D, where C ≤ 0.25D. Taking the water inlet pipe 34 as a circular pipe as an example, the angle corresponding to the distribution range of the first array is within 90°. Taking the axial direction along the water inlet pipe 34 as the column and the circumferential direction of the water inlet pipe 34 as the row, when the first array has only one column, the circumferential area bounded by the left and right ends of the first water inlet hole 36 is C, that is, the angle between the line connecting the left and right ends of the first water inlet hole 36 and the center of the water inlet pipe 34 is within 90°. When the first array has two columns, the circumferential area bounded by the leftmost end of the first water inlet hole 36 on the left and the rightmost end of the first water inlet hole 36 on the right is C, that is, the angle between the line connecting .... The angle between the line connecting the leftmost end of the first water inlet 36 on the right and the center of the inner water inlet pipe 34 is within 90°. Similarly, when the first array has more than two columns, the circumferential area bounded by the leftmost end of the first water inlet 36 on the left and the rightmost end of the first water inlet 36 on the right is C. That is, the angle between the line connecting the leftmost end of the first water inlet 36 on the left and the rightmost end of the first water inlet 36 on the right and the center of the inner water inlet pipe 34 is within 90°. This can avoid the water inlet angle of the inner water inlet pipe 34 being too large and the water inlet direction being too dispersed, thereby forming a stable water flow in the outer water supply pipe 35 and avoiding the phenomenon of water flow collision and conflict in the outer water supply pipe 35 due to excessively dispersed water inlet, thus improving the overall stability and reliability.

[0068] As one embodiment of this utility model, the angle between the direction of the first array and the direction of the second array is 180°, that is, the first array faces away from the second array. The water flow in the inner water inlet pipe 34 is shot from the first water inlet hole 36 to the inner wall of the outer water inlet pipe 35 facing away from the second array. The water flow then flows along the inner wall of the outer water inlet pipe 35 from both sides to the second array at the same time, and finally is shot into the inner cylinder 2 from the second water inlet hole 37. The distance and water pressure of the water flow along both sides of the outer water inlet pipe 35 are equal, so that the water flow on both sides of the second array is uniform, further improving the overall stability and uniformity of water intake.

[0069] As one embodiment of this utility model, the water inlet assembly 3 is provided with multiple water inlet pipes, which are evenly arranged on the edge of the inner cylinder 2. The direction of the line connecting the water inlet pipe and the center of the inner cylinder 2 is the first direction, and the direction of the second water inlet hole 37 of the water inlet pipe is the second direction. The first direction and the second direction are not parallel, that is, the second water inlet hole 37 does not face the center of the inner cylinder 2, nor does it face the side wall of the inner cylinder 2. At the same time, the second water inlet hole 37 of each water inlet pipe is in the same direction, such as counterclockwise or clockwise. Through the cooperation of multiple water inlet pipes, a clockwise or counterclockwise flow direction is provided for the water flow in the inner cylinder 2, so that a stable and uniform water flow is formed in the inner cylinder 2, which is suitable for fish fry breeding and provides a good breeding environment for fish fry.

[0070] As one embodiment of this utility model, the water inlet assembly 3 is provided in two parts, namely, two water inlet pipes are arranged opposite to each other with the center of the inner cylinder 2, and the second water inlet holes 37 of the two water inlet pipes are in opposite directions, with the first direction and the second direction being perpendicular to each other. This can avoid the situation where the angle between the first direction and the second direction is too small, causing the circulating water flow to exist only in the central area of ​​the inner cylinder 2, while the circulation in the edge area of ​​the inner cylinder 2 is not obvious, resulting in the fish fry's breeding environment being limited to the central area of ​​the inner cylinder 2, causing a waste of resources. It can also avoid the situation where the angle between the first direction and the second direction is too large, causing the water flow to impact the inner wall of the inner cylinder 2, resulting in water flow collision and splashing, thereby causing unnecessary impact on the breeding of fish fry.

[0071] See Figure 9 and Figure 10 As one embodiment of this utility model, the cleaning assembly includes a surface cleaning device 4 for cleaning oil stains on the water surface and a central suction device 5 for cleaning bottom sediments. The surface cleaning device adopts a three-section modular design. The surface cleaning device 4 includes a connecting part 41 inserted into the side wall of the inner cylinder 2, a cleaning part 42 disposed at the first end of the connecting part 41, and a drain part 43 disposed at the second end of the connecting part 41. The connecting part 41 can adopt various structures according to specific usage requirements, such as a stainless steel sleeve structure, a PVC pipe, or a PE pipe. The cleaning part 42 is disposed inside the inner cylinder 2, and the drain part 43 is disposed outside the inner cylinder 2. The cleaning part 42 is provided with at least one cleaning hole 44, and the cleaning hole 44 can adopt various shapes according to specific usage requirements, such as circular, elliptical, rectangular, etc. The cleaning hole 44 is preferably a strip-shaped slit, with regular shapes such as triangles or other irregular shapes. Oil stains on the water surface enter the cleaning part 42 through the cleaning hole 44, and then pass through the connecting part 41 and the discharge part 43 in sequence, and finally exit the inner cylinder 2. This utility model adopts a structure that combines the surface cleaning device 4 and the central cleaning device 5, which can clean the bottom and the water surface of the inner cylinder 2 at the same time, effectively reducing oil stains and impurities in the inner cylinder 2 and improving the water quality of the inner cylinder 2. Moreover, the whole assembly is set on the outside of the inner cylinder 2, which can avoid occupying the volume of the inner cylinder 2, improve the volume utilization rate of the inner cylinder 2, and avoid contact with fish fry, thus avoiding unnecessary impact on the fish fry breeding and improving breeding efficiency. At the same time, the cleaning component does not need to empty the inner cylinder 2 during maintenance, which improves the convenience and reliability of use.

[0072] As one embodiment of this utility model, the cleaning part 42 is a straight pipe and is horizontally set. The cleaning hole 44 faces the direction of water flow. Preferably, the cleaning part 42 adopts a horizontal straight pipe structure design. The height of the cleaning part 42 is the same as the water surface height, and its axis is absolutely parallel to the liquid surface of the inner cylinder 2. That is, the cleaning part 42 is horizontally set on the water surface, and the cleaning hole 44 is flush with the water surface. Precise positioning is achieved through the principle of liquid level balance. Preferably, the cleaning part 42 is cast from 304 stainless steel and the surface is mirror polished to reduce water flow resistance. When the oil in the inner cylinder 2 flows through the cleaning part 42 with the water flow, the oil enters the cleaning hole 44.

[0073] See Figure 11 In one embodiment of this utility model, the first end of the connecting part 41 is connected to the middle part of the cleaning part 42. Preferably, the first end of the connecting part 41 is fixedly connected to the middle part of the cleaning part 42 by welding. The connecting part is sealed to prevent leakage of the medium. Both ends of the cleaning part 42 are sealed. The cleaning hole 44 is provided on the side wall of the cleaning part 42. Preferably, both ends of the cleaning part 42 are provided with detachable flange covers for sealing, ensuring that the internal flow of the cleaning part 42 forms a closed working chamber and preventing the medium from flowing into the cleaning part 42 from the cleaning hole 44. Oil stains inside flow out from both ends of the cleaning section 42, improving work efficiency and reliability. At the same time, the cleaning hole 44 is provided with an inclined guide surface, which can ensure the collection efficiency of oil stains and impurities, and prevent oil stains and impurities from accumulating in the opening of the cleaning hole 44, thereby improving the overall cleaning efficiency and effectiveness. Preferably, the angle of the guide surface is 45°. Of course, the angle of the guide surface can be adjusted according to the specific water flow rate and the specific placement of the cleaning section 42, such as 30°, 60° or other angles.

[0074] See Figure 12 As an embodiment of this utility model, there are multiple cleaning holes 44 in the form of strip-shaped slits. The multiple cleaning holes 44 are arranged in a third array, which is set horizontally. By reducing the diameter of the cleaning holes 44, the number of cleaning holes 44 is increased. This can increase the effective contact area between the cleaning holes 44 and the water flow, improve the overall cleaning ability, and prevent the water flow from being too large and causing a large amount of water to rush into the cleaning holes 44 and collide with the inner wall of the cleaning part 42, thereby hindering the flow of water and avoiding unnecessary impact on the water flow. This effectively improves the stability of the water flow and meets the breeding environment of fish fry.

[0075] As an embodiment of this utility model, the side wall of the inner cylinder 2 is provided with multiple cleaning holes, which are distributed along the height direction. The connecting part 41 is inserted into one of the cleaning holes, and the remaining cleaning holes are provided with cleaning sealing parts. The operator can select the appropriate cleaning hole according to the water level in the inner cylinder 2, insert the connecting part 41 into the appropriate cleaning hole, so that the cleaning hole 44 on the cleaning part 42 can be located on the water surface to clean the oil and impurities floating on the water surface. Then, the remaining cleaning holes are sealed with cleaning sealing parts to prevent water leakage from other cleaning holes, which can improve the overall applicability. Preferably, the cleaning sealing parts can adopt various structures, such as detachable plugs or movable cover plates.

[0076] As one embodiment of this utility model, a cleaning seal is provided between the cleaning and plugging component and the cleaning through hole, which further improves the sealing performance between the cleaning and plugging component and the cleaning through hole, preventing water from leaking out of the inner cylinder 2 from the contact part between the cleaning through hole and the cleaning and plugging component, thereby improving the overall working stability and reliability. Preferably, the cleaning seal can adopt different structures or materials depending on the specific structure of the cleaning and plugging component. For example, when the cleaning and plugging component is a detachable plug, the cleaning through hole is provided with internal threads, and the outside of the plug is provided with matching external threads. The cleaning seal can be made of sealant or PTFE tape. When the cleaning and plugging component is a movable cover plate, the cleaning seal can be made of a sealing ring, which is fixed on the side of the cover plate that contacts the side wall of the inner cylinder 2.

[0077] See Figure 13 As an embodiment of this utility model, a cleaning connection hose 45 is provided between the connecting part 41 and the cleaning part 42, so that the cleaning part 42 and the connecting part 41 are flexibly connected. The cleaning part 42 can be adjusted and moved within a certain range. A buoyancy component 46 is provided on the cleaning part 42 to ensure that the cleaning part 42 floats on the water surface to ensure the cleaning ability and cleaning quality of the cleaning part 42 in cleaning oil stains on the water surface. By adding the cleaning connection hose 45 and the buoyancy component 46, the cleaning part 42 can automatically adjust its height according to the change of the water level in the inner cylinder 2, which can not only meet different working environments and improve the overall automation capability, but also effectively reduce the labor intensity of the workers.

[0078] As one embodiment of this utility model, the central suction device 5 includes a Venturi tube 51, a central suction pipe 52, a suction water supply pipe 53, and a suction drain pipe 54. The first end of the suction water supply pipe 53 is connected to an external water tank 33, and the second end of the suction water supply pipe 53 is connected to the water inlet of the Venturi tube 51. The first end of the suction drain pipe 54 is connected to the water outlet of the Venturi tube 51. The first end of the central suction pipe 52 extends into the bottom of the inner cylinder 2, and the second end of the central suction pipe 52 is connected to the vacuum end of the Venturi tube 51. The start and stop of the central suction device 5 are controlled according to whether the suction water supply pipe 53 supplies water. The specific control process is as follows:

[0079] Open state: Water flows from the external water tank 33 through the suction water supply pipe 53, the venturi pipe 51, and the suction drain pipe 54 in sequence, and is finally discharged. Under the action of the venturi effect, a negative pressure is generated at the vacuum end of the venturi pipe 51, which causes the central suction pipe 52 to draw the water in the inner cylinder 2 into the venturi pipe 51, and discharge it through the suction drain pipe 54 along with the water supplied by the suction water supply pipe 53, thereby realizing the suction and cleaning of impurities at the bottom of the inner cylinder 2.

[0080] Stopped state: The external water tank 33 stops supplying water to the suction water supply pipe 53, that is, there is no water flow in the suction water supply pipe 53, the Venturi pipe 51, and the suction drain pipe 54, the Venturi effect disappears, and the central suction pipe 52 stops sucking water from the inner cylinder 2.

[0081] The central suction system replaces the water pump with the Venturi effect, which can effectively reduce the overall operating cost and avoid the noise generated by the water pump, thus further meeting the needs of fish fry farming.

[0082] See Figure 14 As an embodiment of this utility model, the central suction device 5 includes a suction box 56 with a suction drain outlet 55 at the bottom. A mesh plate 57 is provided inside the suction box 56. The second end of the suction drain pipe 54 extends into the suction box 56 and is located above the mesh plate 57. The water in the suction drain pipe 54 flows into the suction box 56. The fish fry sucked up by the central suction pipe 52 fall onto the mesh plate 57, while water, impurities, etc. pass through the mesh plate 57 and are discharged from the suction drain outlet 55 into the suction box 56, thereby realizing the recycling of fish fry and avoiding resource waste.

[0083] As one embodiment of this utility model, the central sewage suction device 5 includes a sedimentation separator 58, and a sewage suction outlet 55 is connected to the sedimentation separator 58. The sewage suction outlet 55 discharges water and impurities into the sedimentation separator 58. The impurities accumulate at the bottom of the sedimentation separator 58, while the water is located at the top of the sedimentation separator 58, thereby achieving the separation of impurities and water. Preferably, the top of the sedimentation separator 58 is provided with a liquid replenishment pipe that communicates with the external water tank 33. The water in the sedimentation separator 58 flows into the external water tank 33 through the liquid replenishment pipe, thereby achieving water recycling and secondary utilization, improving energy efficiency, and reducing operating costs.

[0084] See Figure 15 and Figure 16 As an embodiment of this utility model, the bottom of the inner cylinder 2 is provided with a bottom drain hole 21. The central drainage component 6 includes a drain connecting pipe 61 disposed at the bottom of the inner cylinder 2. The first end of the drain connecting pipe 61 covers and communicates with the bottom drain hole 21, and the second end of the drain connecting pipe 61 is connected to a drain liquid retention component. The drain liquid retention component includes a drain inlet 62 located at the bottom and a drain outlet 63 located at the top. The drain inlet 62 communicates with the drain connecting pipe 61, and the drain outlet 63 is connected to the main drain pipe 8. The water in the inner cylinder 2 flows into the drain connecting pipe 61 from the bottom drain hole 21 and enters the drain liquid retention component from the drain inlet 62. The water accumulates in the drain liquid retention component. The water level in the inner cylinder 2 and the height of the drain outlet 63 are in the following two states:

[0085] State 1: When the system is working normally, the water level in the inner cylinder 2 is higher than the drain outlet 63, the water in the drain liquid retaining component exceeds the drain outlet 63 and is discharged from the drain outlet 63, that is, the water in the inner cylinder 2 is discharged from the drain outlet 63 for normal drainage.

[0086] State 2: When the system is powered off, no water enters the inner cylinder 2. As the water is discharged from the drain outlet 63, the liquid level in the inner cylinder 2 gradually decreases. When the liquid level in the inner cylinder 2 is lower than the height of the drain outlet 63, the water in the drain liquid retaining component is also lower than the height of the drain outlet 63. In other words, the water in the inner cylinder 2 can no longer be discharged, thus stabilizing the water volume in the inner cylinder 2.

[0087] This invention uses a drainage and liquid retention component to control and adjust the water level in the inner cylinder 2, keeping the liquid level in the inner cylinder 2 below the drain outlet 63. This prevents the water level in the inner cylinder 2 from becoming too high and also prevents the water in the inner cylinder 2 from being drained after the system is powered off, thus avoiding the risk of fish dying in the inner cylinder 2 and improving the overall reliability and stability.

[0088] As one embodiment of this utility model, the central drainage assembly 6 includes a central drainage pipe 64 disposed in the inner cylinder 2. One end of the central drainage pipe 64 is inserted into the bottom drainage hole 21. Preferably, the central drainage pipe 64 is made of high-strength corrosion-resistant material. Its lower end is rotatably connected to the bottom drainage hole 21 through a bearing structure or a threaded structure, or forms an interference fit with the bottom drainage hole 21 through an elastic component. This ensures the sealing between the central drainage pipe 64 and the bottom drainage hole 21 and facilitates subsequent maintenance operations. The side wall of the central drainage pipe 64 is provided with several mesh holes 641. The mesh holes 641 allow water and impurities to pass through, while preventing fish fry from passing through. This utility model, through the central drainage pipe 64 with mesh holes 641 on its surface, can block fish fry during drainage, preventing them from being discharged with the water flow from the bottom drainage hole 21. This effectively isolates and restricts the fish fry, significantly improving the operation and maintenance efficiency of the aquaculture system and further enhancing the overall reliability.

[0089] As one embodiment of this utility model, the end of the central drain pipe 64 away from the drain connection pipe 61 is blocked or the end of the central drain pipe 64 away from the drain connection pipe 61 extends beyond the water surface, which can prevent fish fry from entering from the end of the central drain pipe 64 away from the drain connection pipe 61, further achieving isolation and restriction of fish fry, and further improving the reliability of operation.

[0090] As one embodiment of this utility model, a first drainage seal is provided between the central drainage pipe 64 and the bottom drainage hole 21. The first drainage seal can be selected with appropriate sealing materials and sealing structures according to specific usage requirements, such as sealant applied between the central drainage pipe 64 and the bottom drainage hole 21, or sealing rings, rubber parts, elastic gaskets, etc. set between the central drainage pipe 64 and the bottom drainage hole 21. This can further improve the sealing performance between the central drainage pipe 64 and the bottom drainage hole 21, prevent water leakage at the contact part between the central drainage pipe 64 and the bottom drainage hole 21, avoid unnecessary impact on the breeding of fish fry, and improve the overall stability and reliability.

[0091] See Figure 17 As an embodiment of this utility model, the drainage and liquid retention component includes a drainage outer sleeve 65 connected to the drainage connection pipe 61 and a drainage inner sleeve 66 passing through the drainage outer sleeve 65. A drainage channel 67 is provided between the drainage inner sleeve 66 and the drainage outer sleeve 65. The bottom end of the drainage outer sleeve 65 is sealed to the side wall of the drainage inner sleeve 66. The drainage outlet 63 is located at the top of the drainage inner sleeve 66. The bottom of the drainage inner sleeve 66 is connected to the main drainage pipe 8. The drainage outlet 63 is lower than the top end of the drainage outer sleeve 65. The water in the inner cylinder 2 flows through the drainage connection pipe 61 into the drainage outer sleeve 65, then flows upward along the drainage channel 67, and finally enters the drainage inner sleeve 66 through the drainage outlet 63 and flows into the main drainage pipe 8, thus completing the drainage.

[0092] As one embodiment of this utility model, the drainage outlet 63 can be selected with appropriate positions and structures according to specific usage requirements, such as the following two positional structures:

[0093] Structure 1: Drainage outlet 63 is the top open opening of drainage inner sleeve 66. Water flows up to the top of drainage inner sleeve 66 and enters drainage inner sleeve 66 from the top open opening.

[0094] Structure 2: The drainage outlet 63 is a drainage overflow port set on the upper side wall of the drainage inner sleeve 66. Water can enter the drainage inner sleeve 66 when it rises to the drainage overflow port, without having to rise to the top of the drainage inner sleeve 66.

[0095] In one embodiment of this utility model, the bottom end of the inner drain sleeve 66 is detachably connected to the main drain pipe 8. When the inner cylinder 2 needs to be drained, the operator removes the inner drain sleeve 66. The water in the inner cylinder 2 passes through the drain connecting pipe 61 and the drain outer sleeve 65 in sequence, and immediately enters the main drain pipe 8 for discharge. This cancels the liquid level stabilization function in the inner cylinder 2 and enables rapid drainage of the inner cylinder 2. The operation is simple. Preferably, according to specific usage requirements, the inner drain sleeve 66 and the main drain pipe 8 can adopt the following two connection structures:

[0096] Structure 1: The outer wall of the inner drain sleeve 66 is provided with external threads, and the main drain pipe 8 is provided with internal threads. The inner drain sleeve 66 and the main drain pipe 8 are connected by threads. Thread sealant is applied between the internal and external threads to further improve the sealing between the two.

[0097] Structure 2: The inner drain sleeve 66 is provided with an elastic element on its side wall. The inner drain sleeve 66 and the main drain pipe 8 are fitted with an interference fit. The inner drain sleeve 66 is inserted into the main drain pipe 8 through the elastic deformation of the elastic element. At the same time, the elastic element can also further improve the sealing between the inner drain sleeve 66 and the main drain pipe 8.

[0098] As one embodiment of this utility model, the inner drain sleeve 66 is replaceable and multiple sleeves are provided. The lengths of the multiple inner drain sleeves 66 are different. According to specific usage requirements, the operator can adjust the water level in the inner cylinder 2 by replacing the inner drain sleeve 66 and selecting an appropriate length of inner drain sleeve 66, which can meet the needs of various water level heights and improve the overall applicability.

[0099] As an embodiment of this utility model, the top of the drainage inner sleeve 66 is provided with a handle 661. When the worker is disassembling and assembling the drainage inner sleeve 66, the handle 661 can provide the worker with a point of force, making the disassembly and assembly work easy and convenient, and improving the convenience of disassembly and assembly.

[0100] See Figure 18 As an embodiment of this utility model, the drainage and liquid retention component includes a drainage tank 68, a drainage inlet 62 located at the bottom of the drainage tank 68, and a drainage outlet 63 located at the top of the drainage tank 68. The bottom of the drainage tank 68 also has a quick-drainage port 681. A detachable drainage plug is provided inside the quick-drainage port 681. When liquid retention is required, the drainage plug seals the quick-drainage port 681, allowing water to enter the drainage tank 68 from the drainage inlet 62 and exit from the drainage outlet 63. When liquid retention is not required, the drainage plug is removed, allowing water to exit from the quick-drainage port 681. Preferably, the drainage plug has external threads, and the quick-drainage port 681 has internal threads. The drainage plug and the quick-drainage port 681 are connected by threads. Preferably, a sealant is provided between the drainage plug and the quick-drainage port 681, which further improves the sealing performance between them, preventing water leakage from the contact area and improving overall operational reliability and stability.

[0101] See Figure 19 As an embodiment of this utility model, the side drainage assembly 7 includes a side drainage box 71 disposed on the outer side wall of the inner cylinder 2. The side wall of the inner cylinder 2 is provided with a side drainage hole 72, which is connected to the side drainage box 71. The side drainage box 71 is connected to the side drainage pipe 73 and the main drainage pipe 8 in sequence. By setting the side drainage box 71 and the side drainage pipe 73, this utility model can improve the overall drainage efficiency. When the water level in the inner cylinder 2 exceeds the side drainage hole 72, it will automatically enter the side drainage box 71 and be discharged, realizing automatic adjustment of water level and automatic drainage. It can maintain the water volume in the inner cylinder 2 and avoid the risk of water overflow, and it does not require the intervention of staff to control, thus reducing labor costs.

[0102] In one embodiment of this utility model, the side wall of the inner cylinder 2 is provided with a movable drainage baffle 74, which covers the side drainage hole 72. The drainage baffle has the following three adjustable positions:

[0103] Position 1: The drain baffle 74 is not in contact with the side drain hole 72, that is, the side drain hole 72 is completely exposed inside the inner cylinder 2, and the drainage flow is the largest at this time;

[0104] Position 2: The drainage baffle 74 is in contact with part of the side drainage hole 72, that is, the drainage baffle 74 blocks part of the side drainage hole 72. At this time, the blocking area of ​​the side drainage hole 72 can be adjusted according to the specific usage requirements, thereby adjusting the drainage flow.

[0105] Position 3: The drain cover 74 completely covers the side drain hole 72. At this time, the water in the inner cylinder 2 cannot enter the side drain box 71 through the side drain hole 72, that is, the side drain function is turned off.

[0106] This utility model uses a movable drainage baffle 74 to open or close the side drainage hole 72, thereby controlling the opening or closing of the side drainage function. It can also adjust the opening size of the side drainage hole 72 to control the drainage flow of the side drainage function. The control steps are simple, and the drainage baffle 74 is set independently, so it will not interfere with other components during the movement and cause unnecessary impact, thus improving the overall working stability and reliability.

[0107] As one embodiment of this utility model, multiple side drainage boxes 71 are provided, which can further increase the overall drainage flow. The number of side drainage boxes 71 can be appropriately increased or decreased according to specific usage needs. The multiple side drainage boxes 71 are evenly distributed, which can realize that the water in the inner tank 2 flows into the corresponding side drainage boxes 71 evenly at multiple positions, realizing the uniformity of side drainage. This avoids the side drainage flow being greater than that at other positions due to uneven arrangement of the side drainage boxes 71. This would create a water flow from other positions to the dense position in the inner tank 2, which would have a certain impact on the circulating water flow in the inner tank 2, thus affecting the ecological environment of the fish fry and hindering their reproduction. Therefore, after the multiple side drainage boxes 71 are evenly distributed, the water flow can be reduced or eliminated, thereby meeting the reproduction needs of the fish fry.

[0108] See Figure 20 In one embodiment of this utility model, adjacent side drainage tanks 71 are connected, that is, a connecting pipe is provided between adjacent side drainage tanks 71. The adjacent side drainage tanks 71 are connected through the connecting pipe, so that the water inside the adjacent side drainage tanks 71 can flow to each other through the connecting pipe, thereby ensuring that the water level in each side drainage tank 71 is the same. This avoids the side drainage pipe 73 at the bottom of a side drainage tank 71 from becoming blocked, causing the water level in that side drainage tank 71 to be too high, and thus causing water to overflow from that side drainage tank 71. Therefore, the adjacent side drainage tanks 71 adopt a connected structure, which can avoid the phenomenon of overflow in a single side drainage tank 71, thereby avoiding unnecessary impact on the overall drainage.

[0109] See Figure 21 and Figure 22 In one embodiment of this utility model, the side walls of adjacent side drainage boxes 71 are connected, and all the side drainage boxes 71 form a side drainage ring box, which can further increase the usable area of ​​the side drainage boxes 71 and further improve the drainage flow and drainage efficiency. The side drainage ring box can adopt the following two structures:

[0110] Structure 1: The side walls of adjacent side drain tanks 71 are connected, and each side wall has a connecting through hole of the same size that matches each other. The internal connection between the two adjacent side drain tanks 71 is achieved through the connecting through hole, thereby achieving liquid level balance between them.

[0111] Structure 2: The top and bottom of adjacent side drainage tanks 71 are connected, and the side walls of all side drainage tanks 71 are eliminated. That is, all the side drainage tanks 71 form an integral drainage ring tank, and the water flows between all the side drainage tanks 71 without being restricted by the side walls of the side drainage tanks 71.

[0112] As one embodiment of this utility model, multiple side drain pipes 73 are provided, which can further increase the overall drainage flow rate. The number of side drain pipes 73 can be appropriately increased or decreased according to specific usage requirements. Multiple side drain pipes 73 are evenly arranged at the bottom or side wall of the side drainage ring box, which can realize that the water in the side drainage ring box flows into the corresponding side drain pipes 73 evenly at multiple locations, realizing the uniformity of side drainage. This avoids the side drainage flow rate at a certain location being greater than that at other locations due to uneven arrangement of the side drain pipes 73. This would form a water flow from other locations to the dense location in the side drainage ring box, and the water flow would collide with the side wall of the side drainage ring box, resulting in excessive noise. Therefore, after multiple side drain pipes 73 are evenly distributed, the flow path of the water flow can be reduced, thereby reducing the force of the collision between the water flow and the side drainage ring box, and thus effectively reducing noise.

[0113] As one embodiment of this utility model, the side drain hole 72 is rectangular with the long side of the rectangle horizontally set. Compared with the circular drain hole, when the water level in the inner cylinder 2 gradually rises, the rectangular structure of the side drain hole 72 can effectively increase the contact area between the side drain hole 72 and the water, thereby effectively increasing the drainage flow and thus increasing the water exchange efficiency of the inner cylinder 2.

[0114] As an embodiment of this utility model, a filter screen 75 is provided in the side drainage hole 72. The size of the filter screen 75 is smaller than the size of the fish fry. That is, the filter screen 75 allows water to flow through while preventing the fish fry from passing through. This can prevent the fish fry from entering the side drainage box 71 and being discharged from the inner tank 2, effectively protecting, restricting and isolating the fish fry and avoiding waste of the fish fry.

[0115] As one embodiment of this utility model, the side drainage box 71 is set at the top of the inner cylinder 2, which can stabilize the water level of the inner cylinder 2 at a higher position, so that the water volume in the inner cylinder 2 is sufficient, which can raise more fish fry, improve the utilization rate of the inner cylinder 2, and improve the fish fry breeding efficiency. The side drainage pipe 73 is connected to the bottom of the side drainage box 71 and is located below the side drainage box 71. This can reduce the occupation of horizontal space and completely drain the water in the side drainage box 71, which can further improve the drainage efficiency and drainage capacity of the side drainage component 7. Preferably, the height of the side drainage box 71 is h, the height of the inner cylinder 2 is H, and h≤0.5H, that is, the side drainage box 71 is located above the height midline of the inner cylinder 2, which can ensure that there is a certain height difference between the bottom of the side drainage box 71 and the side drainage pipe 73, thereby improving the flow rate and efficiency of side drainage.

[0116] In summary, this utility model provides a fish pond with a stacked structure of inner tank 2 and base 1. The relevant pipes of the drainage component are fixed and interconnected via base 1, avoiding the occupation of underground space. Furthermore, the pond body, water inlet component 3, cleaning component, and drainage component form a unified whole, facilitating movement and transportation and expanding its applicability. The central suction device 5 replaces the water pump with the Venturi effect, effectively reducing overall operating costs and avoiding noise generated by the water pump, further meeting the needs of fish fry farming. The nested inner and outer pipe water inlet structure, through the inner water inlet pipe... The cooperation between the inlet pipe 34 and the outer inlet pipe 35 ensures that when water level fluctuations occur, the buffering effect of the outer inlet pipe 35 maintains a constant water pressure. Combined with the bottom sealing structure of the outer inlet pipe 35, which forms a secondary water distribution chamber, it ensures that the water entering the inner cylinder 2 is distributed in a fan-shaped pattern. This ensures that the water flow velocity at each second inlet hole 37 on the outer inlet pipe 35 is the same and the water output is stable, achieving uniform water supply. The structure combining the surface cleaning device 4 and the central cleaning device 5 allows for simultaneous cleaning of the bottom and surface of the inner cylinder 2, effectively reducing oil and impurities inside the inner cylinder 2 and improving its performance. Water quality; the water level in the inner tank 2 can be controlled and adjusted through the drainage and liquid retention components, keeping the water level in the inner tank 2 below the drain outlet 63. This prevents the water level in the inner tank 2 from becoming too high and also prevents the water in the inner tank 2 from being drained dry after a power outage, thus avoiding the risk of fish mortality in the inner tank 2 and improving overall reliability and stability. By setting up a side drain box 71 and a side drain pipe 73, the overall drainage efficiency can be improved. When the water level in the inner tank 2 exceeds the side drain hole 72, it will automatically enter the side drain box 71 and be discharged, realizing automatic water level adjustment and automatic... The automatic drainage system can maintain the water level in the inner cylinder 2, avoiding the risk of water overflow, and can reduce labor costs by eliminating the need for staff intervention. The movable drainage baffle 74 can open or close the side drainage hole 72, thereby controlling the opening or closing of the side drainage function. It can also adjust the opening size of the side drainage hole 72 to control the drainage flow of the side drainage function. The control steps are simple, and the drainage baffle 74 is set independently, so it will not interfere with other components during the movement and cause unnecessary impact, thus improving the overall working stability and reliability.

[0117] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A fish pond, characterized in that, include: The pool body includes a base (1) and an inner cylinder (2) disposed on the base (1). The base (1) has a built-in receiving space, and the inner cylinder (2) has an opening at the top. Water inlet assembly (3), the water inlet end of the water inlet assembly (3) is connected to an external water tank (33), and the water outlet end of the water inlet assembly (3) extends into the inner cylinder (2); A cleaning assembly is provided on the side wall of the inner cylinder (2). The cleaning assembly includes a surface cleaning device (4) for cleaning oil stains on the water surface and a central suction device (5) for cleaning bottom sediments. The central suction device (5) includes a Venturi tube (51), a central suction pipe (52), a suction water supply pipe (53), and a suction drain pipe (54). The first end of the suction water supply pipe (53) is connected to the external water tank (33), and the second end of the suction water supply pipe (53) is connected to the inlet end of the Venturi tube (51). The first end of the suction drain pipe (54) is connected to the outlet end of the Venturi tube (51). The first end of the central suction pipe (52) extends into the bottom of the inner cylinder (2), and the second end of the central suction pipe (52) is connected to the vacuum end of the Venturi tube (51). The drainage assembly includes a central drainage assembly (6) disposed at the bottom of the inner cylinder (2), a side drainage assembly (7) disposed on the side wall of the inner cylinder (2), and a main drainage pipe (8) disposed outside the base (1). The main drainage pipe (8) is connected to the central drainage assembly (6) and the side drainage assembly (7). The bottom end of the central drainage assembly (6) passes through the bottom of the inner cylinder (2) into the receiving space and extends out from the side wall of the base (1) to connect to the main drainage pipe (8).

2. The fish pond according to claim 1, characterized in that, The water inlet assembly (3) includes a water inlet fixing bracket (31) disposed on the outer side wall of the inner cylinder (2) and a water inlet connecting pipe (32) disposed on the water inlet fixing bracket (31). The first end of the water inlet connecting pipe (32) is connected to the outer water tank (33), and the second end of the water inlet connecting pipe (32) is connected to the water inlet pipe. The water inlet pipe extends into the inner cylinder (2).

3. The fish pond according to claim 2, characterized in that, The water inlet pipe includes an inner water inlet pipe (34) connected to the water inlet connecting pipe (32) at its top and an outer water inlet pipe (35) sleeved outside the inner water inlet pipe (34). There is a gap between the outer water inlet pipe (35) and the inner water inlet pipe (34). The bottom of the outer water inlet pipe (35) is sealed, and the top of the outer water inlet pipe (35) is sealed between the inner water inlet pipe (34). The inner water inlet pipe (34) is provided with a plurality of first water inlet holes (36), and the outer water inlet pipe (35) is provided with a plurality of second water inlet holes (37).

4. The fish pond according to claim 1, characterized in that, The inner cylinder (2) has a cleaning through hole on its side wall. The surface cleaning device (4) includes a connecting part (41) passing through the cleaning through hole, a cleaning part (42) located at the first end of the connecting part (41), and a drain part (43) located at the second end of the connecting part (41). The cleaning part (42) is located inside the inner cylinder (2), and the drain part (43) is located outside the inner cylinder (2) and connected to the main drain pipe (8). The cleaning part (42) has at least one cleaning hole (44).

5. The fish pond according to claim 4, characterized in that, The first end of the connecting part (41) is connected to the middle part of the cleaning part (42). Both ends of the cleaning part (42) are sealed. The side wall of the cleaning part (42) is provided with a plurality of cleaning holes (44), which are arranged in a third array.

6. The fishpond according to claim 1, characterized in that, The bottom of the inner cylinder (2) is provided with a bottom drain hole. The central drain assembly (6) includes a drain connecting pipe (61) disposed in the base (1). The first end of the drain connecting pipe (61) covers and communicates with the bottom drain hole. The second end of the drain connecting pipe (61) extends out of the side wall of the base (1) and is connected to the main drain pipe (8). A drain liquid retention component is provided between the drain connecting pipe (61) and the main drain pipe (8). The drain liquid retention component includes a drain inlet (62) located at the bottom and a drain outlet (63) located at the top. The drain inlet (62) communicates with the drain connecting pipe (61), and the drain outlet (63) is connected to the main drain pipe (8).

7. The fishpond according to claim 6, characterized in that, The central drainage assembly (6) includes a central drainage pipe (64) disposed in the inner cylinder (2), one end of the central drainage pipe (64) is inserted into the bottom drainage hole, and the side wall of the central drainage pipe (64) is provided with a plurality of mesh holes (641).

8. The fishpond according to claim 6, characterized in that, The drainage and liquid retention component includes a drainage outer sleeve (65) connected to the drainage connecting pipe (61) and a drainage inner sleeve (66) passing through the drainage outer sleeve (65). A drainage channel (67) is provided between the drainage inner sleeve (66) and the drainage outer sleeve (65). The bottom end of the drainage outer sleeve (65) is sealed with the side wall of the drainage inner sleeve (66). The drainage outlet (63) is located at the top of the drainage inner sleeve (66). The bottom of the drainage inner sleeve (66) is connected to the main drainage pipe (8). The drainage outlet (63) is lower than the top end of the drainage outer sleeve (65).

9. The fishpond according to claim 1, characterized in that, The side drainage assembly (7) includes a side drainage box (71) disposed on the outer side wall of the inner cylinder (2). The side wall of the inner cylinder (2) is provided with a side drainage hole (72). The side drainage hole (72) is connected to the side drainage box (71). The side drainage box (71) is connected to the side drainage pipe (73) and the main drainage pipe (8) in sequence.

10. The fishpond according to claim 9, characterized in that, The inner cylinder (2) has a movable drainage baffle (74) on its side wall, which covers the side drainage hole (72).

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