Fishpond

Abstract

The fishpond 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, related pipelines are fixed and connected through the base, the situation that underground space is occupied is avoided, the pool body, the water inlet assembly, the sewage disposal assembly and the drainage assembly jointly form a whole, moving and carrying are convenient, and the application range can be widened.

Description

Technical Field

[0001] The present invention relates to the technical field of aquatic product farming, and particularly to a fishpond. Background Art

[0002] As a modern intensive aquaculture mode, the recirculating aquaculture system has the advantages of high aquaculture density, no season limitation, water saving, land saving, and controllable environment. Currently, in the process of industrial aquaculture, the aquaculture system usually includes aquaculture ponds, biological ponds, circulating pumps, and pipelines. The inlet water and return water of the aquaculture ponds are all transported through pipelines. The characteristic of pipeline transportation is relatively large transportation volume. According to the different pipe diameters, the transportation volume can reach 1000m 3 / h. In the prior art, metal pipelines are usually used to transport water, and the metal pipelines will occupy a large area.

[0003] Although the metal pipelines can be buried underground at the location where the aquaculture ponds are located to reduce the area occupied, burying the metal pipelines requires a large amount of manpower, resulting in an increase in the overall manufacturing cost; at the same time, if the metal pipelines are buried underground, the positions of the aquaculture ponds are fixed and cannot be moved, resulting in limited use; in addition, most of the existing aquaculture ponds use the structure of a liquid pumping pump to discharge the impurities at the bottom of the pond from the aquaculture pond, resulting in high overall noise and cost.

[0004] Therefore, it is necessary to provide a fishpond that can reduce the overall occupied area, is convenient to move and carry as a whole, has a wide range of uses, and can also avoid the use of a liquid pumping pump, reduce noise, and save costs. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a fishpond.

[0006] The technical solution of the present invention is as follows:

[0007] A fishpond, comprising:

[0008] A pond body, the pond body includes a base and an inner cylinder arranged on the base. The base is internally provided with an accommodation space, and the top of the inner cylinder is open;

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

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

[0011] A drainage assembly, the drainage assembly includes 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 drain pipe arranged outside the base. The main drain 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 and enters the accommodation space, and extends out from the side wall of the base to connect to the main drain pipe.

[0012] As a further improvement of the present invention, the water inlet assembly includes a water inlet fixing frame arranged on the outer side wall of the inner cylinder and a water inlet connecting pipe arranged on the water inlet fixing frame. 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 a water inlet pipe, and the water inlet pipe extends into the inner cylinder.

[0013] As a further improvement of the present invention, the water inlet pipe includes a water inlet inner pipe with the top connected to the water inlet connecting pipe and a water inlet outer pipe sleeved outside the water inlet inner pipe. There is a gap between the water inlet outer pipe and the water inlet inner pipe. The bottom of the water inlet outer pipe is blocked, the top of the water inlet outer pipe is blocked with the water inlet inner pipe, and a number of first water inlet holes are provided on the water inlet inner pipe, and a number of second water inlet holes are provided on the water inlet outer pipe.

[0014] As a further improvement of the present invention, a dirt cleaning through hole is provided on the side wall of the inner cylinder. The surface dirt cleaning device includes a connecting portion passing through the dirt cleaning through hole, a dirt cleaning portion arranged at the first end of the connecting portion, and a sewage discharging portion arranged at the second end of the connecting portion. The dirt cleaning portion is arranged inside the inner cylinder, the sewage discharging portion is arranged outside the inner cylinder and is connected to the main drain pipe, and at least one dirt cleaning hole is provided on the dirt cleaning portion.

[0015] As a further improvement of the present invention, the first end of the connecting portion is connected to the middle of the dirt cleaning portion. Both ends of the dirt cleaning portion are blocked, and a plurality of the dirt cleaning holes are provided on the side wall of the dirt cleaning portion, and the plurality of dirt cleaning holes are arranged in a third array.

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

[0017] As a further improvement of the present invention, the central drainage assembly includes a central drain pipe disposed in the inner cylinder. One end of the central drain pipe is inserted into the bottom drain hole, and several mesh holes are provided on the side wall of the central drain pipe.

[0018] As a further improvement of the present invention, the drainage liquid retention member includes a drainage outer sleeve communicating with the drainage connecting pipe and a drainage inner sleeve inserted in 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 with the side wall of the drainage inner sleeve. The drainage outlet is provided at the top of the drainage inner sleeve. The bottom of the drainage inner sleeve communicates with the main drain pipe, and the drainage outlet is lower than the top end of the drainage outer sleeve.

[0019] As a further improvement of the present invention, the side drainage assembly includes a side drainage box provided on the outer side wall of the inner cylinder. Side drainage holes are provided on the side wall of the pool body. The side drainage holes communicate with the side drainage box. The side drainage box is sequentially connected to a side drain pipe and the main drain pipe.

[0020] As a further improvement of the present invention, a movable drainage shutter is provided on the side wall of the inner cylinder, and the drainage shutter shields the side drainage holes.

[0021] For the present invention according to the above solution, the beneficial effects of the present invention are as follows:

[0022] 1. The present invention adopts a structure in which the inner cylinder and the base are stacked. The relevant pipelines of the drainage assembly are fixed and interconnected through the base, avoiding occupying underground space. Moreover, the pool body, the water inlet assembly, the sewage cleaning assembly, and the drainage assembly together form an integral whole, which is convenient for movement and handling, and can improve the scope of application.

[0023] 2. The central sewage suction device of the present invention replaces the water pump through the Venturi effect, which can not only effectively reduce the overall working cost, but also avoid the noise generated by the water pump, further meeting the breeding needs of fry.

[0024] 3. The present invention adopts an inner and outer tube nested water inlet structure. Water flows through the inner water inlet tube into the outer water inlet tube, and then enters the pool body through the outer water inlet tube, which can make the water flow velocity of each second water inlet hole on the outer water inlet tube the same and the water outlet stable, realizing overall uniform water supply and meeting the growth environment of fry.

[0025] 4. The present invention adopts a structure combining a surface cleaning device and a central cleaning device, which can clean the bottom and water surface of the inner cylinder simultaneously, effectively reducing the oil stains and impurities in the pool body and improving the water quality of the pool.

[0026] 5. The cleaning component of the present invention is integrally arranged outside the inner cylinder, and only the central sewage suction pipe extends into the inner cylinder. This can not only avoid occupying the volume of the inner cylinder and improve the volume utilization rate of the inner cylinder, but also avoid contacting the fry and prevent unnecessary impacts on the fry breeding, thereby improving the breeding efficiency.

[0027] 6. The present invention can control and adjust the water level in the inner cylinder through a drainage and liquid retention component, avoiding the phenomenon that the water in the breeding pool is drained dry after the system power failure, preventing the risk of fish death in the breeding pool, and improving the overall reliability and stability.

[0028] 7. The present invention can block the fry during the drainage process through the central drainage pipe with mesh holes on the surface, preventing the fry from being discharged together with the water flow from the bottom drainage holes, effectively isolating and restricting the fry, and further improving the overall reliability.

[0029] 8. The present invention can improve the overall drainage efficiency by setting a side drainage tank and a side drainage pipe. When the water level in the inner cylinder exceeds the side drainage hole, it will automatically enter the side drainage tank and be discharged, realizing automatic water level adjustment and automatic drainage. This can not only maintain the water volume in the inner cylinder and avoid the risk of water level overflow, but also does not require staff intervention control, reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0032] Figure 3 is a schematic structural diagram of the water inlet component of the present invention from the first angle;

[0033] Figure 4 is a schematic structural diagram of the water inlet component of the present invention from the second angle;

[0034] Figure 5 is a schematic structural diagram of the water inlet pipe of the present invention from the first angle;

[0035] Figure 6 It is a schematic structural diagram of the second angle of the water inlet pipe of the present invention;

[0036] Figure 7 It is a schematic structural diagram of the inner water inlet pipe of the present invention;

[0037] Figure 8 It is a schematic structural diagram of the outer water inlet pipe of the present invention;

[0038] Figure 9 It is a schematic structural diagram of the first angle of the sewage cleaning component of the present invention;

[0039] Figure 10 It is a schematic structural diagram of the second angle of the sewage cleaning component of the present invention;

[0040] Figure 11 It is a schematic structural diagram of the first embodiment of the surface sewage cleaning device of the present invention;

[0041] Figure 12 It is a schematic structural diagram of the second embodiment of the surface sewage cleaning device of the present invention;

[0042] Figure 13 It is a schematic structural diagram of the third embodiment of the surface sewage cleaning device of the present invention;

[0043] Figure 14 It is a schematic structural diagram of the sewage suction box of the present invention;

[0044] Figure 15 It is a schematic structural diagram of the first angle of the central drainage component of the present invention;

[0045] Figure 16 It is a schematic structural diagram of the second angle of the central drainage component of the present invention;

[0046] Figure 17 It is a schematic structural diagram of the first embodiment of the drainage liquid retention member of the present invention;

[0047] Figure 18 It is a schematic structural diagram of the second embodiment of the drainage liquid retention member of the present invention;

[0048] Figure 19 It is a schematic structural diagram of the first embodiment of the side drainage component of the present invention;

[0049] Figure 20 It is a schematic structural diagram of the second embodiment of the side drainage component of the present invention;

[0050] Figure 21 It is a schematic structural diagram of the first angle of the third embodiment of the side drainage component of the present invention;

[0051] Figure 22 It is a schematic structural diagram of the second angle of the third embodiment of the side drainage component of the present invention.

[0052] In the figure: 1, base; 2, inner cylinder; 21, bottom drain hole; 3, water inlet assembly; 31, water inlet fixing 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, sewage discharging part; 44, cleaning hole; 45, cleaning connecting hose; 46, buoyancy member; 5, central cleaning device; 51, Venturi tube; 52, central sewage suction pipe; 53, sewage suction water supply pipe; 54, sewage suction drain pipe; 55, sewage suction drain port; 56, sewage suction box; 57, mesh plate; 58, sediment separator; 6, central drain assembly; 61, drain connecting pipe; 62, drain inlet; 63, drain outlet; 64, central drain pipe; 641, mesh holes; 65, drain outer sleeve; 66, drain inner sleeve; 661, handle; 67, drain channel; 68, drain box body; 681, quick drain port; 7, side drain assembly; 71, side drain box; 72, side drain hole; 73, side drain pipe; 74, drain shielding plate; 75, filter screen; 8, main drain pipe. Detailed implementation manners

[0053] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0054] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0055] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in different embodiments of the present invention 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 , the present invention provides a fish pond, comprising:

[0057] A pool body, which includes a base 1 and an inner cylinder 2 provided on the base 1. The base 1 has an accommodation space inside, and the top of the inner cylinder 2 is open;

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

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

[0060] A drainage assembly, the drainage assembly includes a central drainage assembly 6 arranged at the bottom of the inner cylinder 2, a side drainage assembly 7 arranged on the side wall of the inner cylinder 2, and a main drain pipe 8 arranged outside the base 1. The main drain 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 and enters the accommodation space, and extends out from the side wall of the base 1 to be connected to the main drain pipe 8.

[0061] The present invention provides the functions of water inlet and drainage to the inner cylinder 2 through the water inlet assembly 3 and the drainage assembly respectively, and at the same time enables the water flow in the inner cylinder 2 to circulate, avoiding the long-term accumulation of oil stains, impurities, etc. in the inner cylinder 2, ensuring the cleanliness of the water flow in the inner cylinder 2, and providing a good breeding environment for fry; moreover, the present invention adopts a structure in which the inner cylinder 2 and the base 1 are stacked, and the relevant pipelines of the drainage assembly are fixed and interconnected through the base 1, avoiding occupying underground space, and the pool body, the water inlet assembly 3, the sewage cleaning assembly and the drainage assembly together form a whole, which is convenient for moving and handling, and can improve the scope of application; at the same time, the central sewage suction device 5 of the present invention replaces the water pump through the Venturi effect, which can not only effectively reduce the overall working cost, but also avoid the noise generated by the water pump, further meeting the breeding needs of fry.

[0062] See Figure 3-8. As an embodiment of the present invention, the water inlet assembly 3 includes a water inlet fixing frame 31 provided on the outer side wall of the inner cylinder 2 and a water inlet connecting pipe 32 provided on the water inlet fixing frame 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 which extends into the inner cylinder 2. Preferably, the water inlet fixing frame 31 is fixedly connected to the side wall of the inner cylinder 2 by a stainless steel hoop, and the angle between the water inlet fixing frame 31 and the side wall of the inner cylinder 2 is adjustable. The water inlet pipe includes a water inlet inner pipe 34 with the top connected to the water inlet connecting pipe 32 and a water inlet outer pipe 35 sleeved outside the water inlet inner pipe 34. There is a gap between the water inlet outer pipe 35 and the water inlet inner pipe 34. Preferably, the water inlet inner pipe 34 is made of 304 stainless steel, and the water inlet outer pipe 35 is a thickened engineering plastic product. The bottom of the water inlet outer pipe 35 is blocked, and the top of the water inlet outer pipe 35 is blocked between the water inlet inner pipe 34. Preferably, the bottom of the water inlet outer pipe 35 is completely closed by argon arc welding process, and the top of the water inlet outer pipe 35 is radially sealed with the end face or side wall of the water inlet inner pipe 34 through a silica gel sealing ring to prevent the water flow in the water inlet outer pipe 35 from leaking from both ends of the water inlet outer pipe 35, improving stability. A number of first water inlet holes 36 are provided on the water inlet inner pipe 34, and a number of second water inlet holes 37 are provided on the water inlet outer pipe 35. The water flow passes through the water inlet connecting pipe 32 and the water inlet inner pipe 34 in sequence from the external water tank 33, and enters the water inlet outer pipe 35 through the first water inlet holes 36, forming a stable laminar flow in the water inlet outer pipe 35 to eliminate the turbulent flow phenomenon, and finally shoots into the inner cylinder 2 through the second water inlet holes 37 to complete the water supply to the inner cylinder 2. The present invention adopts an inner and outer pipe nested water inlet structure. Through the mutual cooperation of the water inlet inner pipe 34 and the water inlet outer pipe 35, when there is a water level fluctuation, the buffering effect of the water inlet outer pipe 35 can maintain a constant water pressure. Coupled with the blocking structure at the bottom of the water inlet outer pipe 35 to form a water flow secondary distribution cavity, it is ensured that the water flow entering the inner cylinder 2 is fan-shaped diffusion distribution, enabling the water flow velocity of each second water inlet hole 37 on the water inlet outer pipe 35 to be the same and the water outlet to be stable, realizing overall uniform water supply. Compared with the traditional direct-through water inlet device, the uniformity of dissolved oxygen distribution of this water inlet structure is increased by 40%, meeting the growth environment of fry.

[0063] As an embodiment of the present invention, the bottom of the water inlet inner pipe 34 is blocked, which can prevent the bottom of the water inlet inner pipe 34 from communicating with the water inlet outer pipe 35 and ensure that the water flow enters the water inlet outer pipe 35 from the side wall of the water inlet inner pipe 34, thereby forming a stable water flow in the water inlet outer pipe 35 to eliminate the turbulent flow phenomenon, and can prevent the water pressure at the bottom of the water inlet outer pipe 35 from being too large, resulting in a faster water inlet speed in the second water inlet holes 37 near the bottom, thus ensuring that the water inlet speeds of each second water inlet hole 37 are the same and realizing uniform water supply.

[0064] As an embodiment of the present invention, the radius of the first water inlet hole 36 is smaller than that 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, due to the smaller cross-sectional area of the first water inlet hole 36, a higher velocity gradient will be formed under the condition of the same flow rate. When the 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 flow velocity, so that the velocity of the water flowing from the inner water inlet pipe 34 into the outer water inlet pipe 35 is greater than the velocity of the water flowing from the outer water inlet pipe 35 into the inner cylinder 2. This differential aperture configuration makes the water flow velocity between the inner water inlet pipe 34 and the outer water inlet pipe 35 form a certain difference, which not only ensures the conveying efficiency of the inner water inlet pipe 34, but also realizes stable water distribution through the buffering of the outer water inlet pipe 35, avoids the generation of turbulent disturbances inside the inner cylinder 2, and improves the stability and reliability of the overall water inlet.

[0065] As an embodiment of the present invention, the first water inlet holes 36 are arranged in a first array along the axial direction of the inner water inlet pipe 34, the second water inlet holes 37 are arranged in a second array along the axial direction of the outer water inlet pipe 35, and the first water inlet holes 36 and the second water inlet holes 37 are arranged in a staggered manner. After the water flows from the first water inlet holes 36 into the outer water inlet pipe 35, it is guided by the outer water inlet pipe 35 and finally enters the inner cylinder 2 through the second water inlet holes 37. The first water inlet holes 36 and the second water inlet holes 37 are both arranged in an array form, so that the first water inlet holes 36 are evenly distributed among each other and the second water inlet holes 37 are evenly distributed among each other, which can effectively improve the water inlet uniformity of the outer water inlet pipe 35, enhance the turbulence intensity of the internal flow field of the outer water inlet pipe 35, and at the same time realize the three-dimensional distribution of the water inlet path through the hierarchical diversion design of the inner and outer pipe bodies.

[0066] As an embodiment of the present invention, the circumferential area between the two edges of the second array is A, and the lateral area of the water inlet outer pipe 35 is B, where A ≤ 0.25B. Taking the water inlet outer 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 of the water inlet outer pipe 35 as the column and the circumferential direction of the water inlet outer 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 included angle between the left and right ends of the second water inlet hole 37 and the center of the water inlet outer 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, that is, the included angle between the leftmost end of the second water inlet hole 37 on the left, the rightmost end of the second water inlet hole 37 on the right and the center of the water inlet outer pipe 35 is within 90°. And so on, when the second array has more than two columns, the circumferential area bounded by the leftmost end of the second water inlet hole 37 on the leftmost side and the rightmost end of the second water inlet hole 37 on the rightmost side is A, that is, the included angle between the leftmost end of the second water inlet hole 37 on the leftmost side, the rightmost end of the second water inlet hole 37 on the rightmost side and the center of the water inlet outer pipe 35 is within 90°. This can avoid too large an inlet angle and too scattered an inlet direction of the water inlet outer pipe 35, thereby providing a stable water flow direction to the inner cylinder 2 and improving the overall stability and reliability.

[0067] As an embodiment of the present invention, the circumferential area between the two edges of the first array is C, and the lateral area of the water inlet inner pipe 34 is D, where C ≤ 0.25D. Taking the water inlet inner 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 of the water inlet inner pipe 34 as the column and the circumferential direction of the water inlet inner 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 left and right ends of the first water inlet hole 36 and the center of the water inlet inner 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 leftmost end of the first water inlet hole 36 on the left, the rightmost end of the first water inlet hole 36 on the right and the center of the water inlet inner pipe 34 is within 90°. And so on, when the first array has more than two columns, the circumferential area bounded by the leftmost end of the first water inlet hole 36 on the leftmost side and the rightmost end of the first water inlet hole 36 on the rightmost side is C, that is, the angle between the leftmost end of the first water inlet hole 36 on the leftmost side, the rightmost end of the first water inlet hole 36 on the rightmost side and the center of the water inlet inner pipe 34 is within 90°. This can avoid too large an inlet angle and too scattered an inlet direction of the water inlet inner pipe 34, thereby forming a stable water flow in the water supply outer pipe 35 and avoiding the phenomenon of water flow collision and conflict in the water supply outer pipe 35 caused by too scattered water inlet, and improving the overall stability and reliability.

[0068] As an embodiment of the present invention, 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 water inlet inner pipe 34 shoots from the first water inlet hole 36 to the inner wall of the water supply outer pipe 35 facing away from the second array, and then the water flow flows along the inner wall of the water supply outer pipe 35 from both sides to the second array at the same time, and finally shoots into the inner cylinder 2 from the second water inlet hole 37. The distances and water pressures of the water flow flowing along both sides of the water supply outer pipe 35 are equal, making the water flow flowing on both sides of the second array uniform, and further improving the stability and uniformity of the overall water inlet.

[0069] As an embodiment of the present invention, there are multiple water inlet assemblies 3, and multiple water inlet pipes are evenly arranged on the edge of the inner cylinder 2. The direction of the connection line between 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 the side wall of the inner cylinder 2. At the same time, the second water inlet holes 37 of each water inlet pipe are all in the same direction, such as counterclockwise or clockwise. Through the joint 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 fry breeding and provides a good breeding environment for the fry.

[0070] As an embodiment of the present invention, there are two water inlet assemblies 3, that is, two water inlet pipes are arranged opposite to each other with the center of the inner cylinder 2 as the center. The second water inlet holes 37 of the two water inlet pipes are in opposite directions, and the first direction is perpendicular to the second direction. This can not only avoid the situation that the included angle between the first direction and the second direction is too small, resulting in the circulating water flow only existing in the central area of the inner cylinder 2, while the circulation in the edge area of the inner cylinder 2 is not obvious, causing the breeding environment of fry to only exist in the central area of the inner cylinder 2 and wasting resources, but also avoid the situation that the included angle between the first direction and the second direction is too large, resulting in the water flow impacting the inner side wall of the inner cylinder 2, causing water flow collision and water splash, thus having an unnecessary impact on the breeding of fry.

[0071] See Figure 9 and Figure 10 As an embodiment of the present invention, the sewage cleaning component includes a surface sewage cleaning device 4 for cleaning the oil stain on the water surface and a central sewage suction device 5 for cleaning the bottom sediment; the surface sewage cleaning device adopts a three-section modular design. The surface sewage cleaning device 4 includes a connecting part 41 penetrated in the side wall of the inner cylinder 2, a sewage cleaning part 42 arranged at the first end of the connecting part 41, and a sewage discharge part 43 arranged at the second end of the connecting part 41. Among them, 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, etc. The sewage cleaning part 42 is arranged inside the inner cylinder 2, and the sewage discharge part 43 is arranged outside the inner cylinder 2. At least one sewage cleaning hole 44 is provided on the sewage cleaning part 42. The sewage cleaning hole 44 can adopt various shapes according to specific usage requirements, such as regular shapes like circular, oval, rectangular, triangular, etc., or other irregular shapes. Preferably, the sewage cleaning hole 44 is in the shape of a strip-shaped slit. The oil stain on the water surface enters the sewage cleaning part 42 through the sewage cleaning hole 44, and then passes through the connecting part 41 and the sewage discharge part 43 in sequence, and finally discharges from the inner cylinder 2. The present invention adopts a structure combining the surface sewage cleaning device 4 and the central sewage cleaning device 5, which can clean the bottom and the water surface of the inner cylinder 2 at the same time, effectively reducing the oil stain and impurities in the inner cylinder 2 and improving the water quality of the inner cylinder 2; and the whole is arranged outside the inner cylinder 2, which can not only avoid occupying the volume of the inner cylinder 2 and improve the volume utilization rate of the inner cylinder 2, but also avoid contacting with the fry and avoid having an unnecessary impact on the breeding of the fry, thereby improving the breeding efficiency; at the same time, the sewage cleaning component does not need to empty the inner cylinder 2 during maintenance, improving the use convenience and reliability.

[0072] As an embodiment of the present invention, the cleaning part 42 is a straight tube, and the cleaning part 42 is horizontally arranged, and the cleaning hole 44 faces the direction of water flow. Preferably, the cleaning part 42 adopts a horizontal straight tube 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 arranged on the water surface, and the cleaning hole 44 is flush with the water surface height, and precise positioning is achieved through the liquid level balance principle. Preferably, the cleaning part 42 is cast with 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 together with the water flow, the oil enters the cleaning hole 44.

[0073] See also Figure 11 As an embodiment of the present invention, the first end of the connecting portion 41 is connected to the middle part of the cleaning portion 42. Preferably, the first end of the connecting portion 41 is fixedly connected to the middle part of the cleaning portion 42 by welding. The connecting part is sealed to prevent leakage of the medium. Both ends of the cleaning portion 42 are blocked. The cleaning hole 44 is provided on the side wall of the cleaning portion 42. Preferably, both ends of the cleaning portion 42 are provided with a detachable flange cover for blocking, so as to ensure that the inside of the cleaning portion 42 flows to form a closed working chamber, and avoids flowing into the cleaning portion 42 from the cleaning hole 44. The oil and dirt flow out from both ends of the cleaning part 42, thereby improving work efficiency and work reliability. At the same time, an inclined guide surface is provided in the cleaning hole 44. The guide surface can ensure the collection efficiency of oil and dirt and impurities, and can prevent oil and dirt and impurities from accumulating in the opening of the cleaning hole 44, thereby improving the overall cleaning efficiency and cleaning 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 position of the cleaning part 42, such as 30° or 60° or other angles.

[0074] See also Figure 12 As an embodiment of the present invention, there are multiple cleaning holes 44 in the form of strip-shaped gaps, and the multiple cleaning holes 44 are arranged in a third array, and the third array is horizontally arranged. By reducing the diameter of the cleaning holes 44 and increasing the number of the cleaning holes 44, it is possible to increase the effective contact area between the cleaning holes 44 and the water flow and improve the overall cleaning ability, and it is possible to avoid a large amount of water flowing into the cleaning holes 44 due to the cleaning holes 44 being too large, and colliding with the inner wall of the cleaning part 42, thereby hindering the flow of the water body, avoiding unnecessary influence on the water flow, effectively improving the stability of the water flow, and meeting the breeding environment of the fry.

[0075] As an embodiment of the present invention, a plurality of dirt cleaning through holes are provided on the side wall of the inner cylinder 2. The plurality of dirt cleaning through holes are distributed in the height direction. The connecting portion 41 is inserted into one of the dirt cleaning through holes, and dirt cleaning blocking members are provided in the remaining dirt cleaning through holes. Workers can select a suitable dirt cleaning through hole according to the water level in the inner cylinder 2, insert the connecting portion 41 into the suitable dirt cleaning through hole, so that the dirt cleaning holes 44 on the dirt cleaning portion 42 can be located above the water surface to clean the oil stains and impurities floating on the water surface, and then block the remaining dirt cleaning through holes with the dirt cleaning blocking members to prevent water leakage from other dirt cleaning through holes, which can improve the overall scope of application. Preferably, the dirt cleaning blocking members can adopt various structures, such as detachable plugs or movable cover plates, etc.

[0076] As an embodiment of the present invention, a dirt cleaning sealing member is provided between the dirt cleaning blocking member and the dirt cleaning through hole, which further improves the sealing performance between the dirt cleaning blocking member and the dirt cleaning through hole, prevents water from leaking out of the inner cylinder 2 from the contact portion between the dirt cleaning through hole and the dirt cleaning blocking member, and improves the overall working stability and reliability. Preferably, the dirt cleaning sealing member can adopt different structures or materials according to the specific structure of the dirt cleaning blocking member. For example, when the dirt cleaning blocking member is a detachable plug, internal threads are provided in the dirt cleaning through hole, and external threads matching the outside of the plug are provided. The dirt cleaning sealing member can adopt sealant or raw tape; when the dirt cleaning blocking member is a movable cover plate, the dirt cleaning sealing member can adopt a sealing ring, and the sealing ring is fixed on the side of the cover plate in contact with the side wall of the inner cylinder 2.

[0077] See Figure 13 , as an embodiment of the present invention, a dirt cleaning connecting hose 45 is provided between the connecting portion 41 and the dirt cleaning portion 42, so that the dirt cleaning portion 42 and the connecting portion 41 are soft-connected. The dirt cleaning portion 42 can be adjusted and moved within a certain range. A buoyancy member 46 is provided on the dirt cleaning portion 42, which can ensure that the dirt cleaning portion 42 floats on the water surface to ensure the cleaning ability and cleaning quality of the dirt cleaning portion 42 for the oil stains on the water surface. By adding the dirt cleaning connecting hose 45 and the buoyancy member 46, the dirt cleaning portion 42 can automatically adjust its own height according to the change of the water surface height in the inner cylinder 2, which can not only meet different working environments, improve the overall automation ability, but also effectively reduce the labor intensity of workers.

[0078] As an embodiment of the present invention, the central sewage suction device 5 includes a Venturi tube 51, a central sewage suction pipe 52, a sewage suction water supply pipe 53, and a sewage suction drain pipe 54. The first end of the sewage suction water supply pipe 53 is connected to an external water tank 33, the second end of the sewage suction water supply pipe 53 is connected to the water inlet end of the Venturi tube 51, the first end of the sewage suction drain pipe 54 is connected to the water outlet end of the Venturi tube 51, the first end of the central sewage suction pipe 52 extends into the bottom of the inner cylinder 2, and the second end of the central sewage suction pipe 52 is connected to the vacuum end of the Venturi tube 51. The start and stop of the central sewage suction device 5 are controlled according to whether the sewage 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 sewage suction water supply pipe 53, the Venturi tube 51, and the sewage 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 tube 51, causing the central sewage suction pipe 52 to suck the water body in the inner cylinder 2 into the Venturi tube 51 and discharge it together with the water body supplied by the sewage suction water supply pipe 53 through the sewage suction drain pipe 54, realizing the suction and cleaning of impurities at the bottom of the inner cylinder 2;

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

[0081] The central sewage suction device replaces the water pump through the Venturi effect, which can not only effectively reduce the overall working cost but also avoid the noise generated by the water pump, further meeting the breeding requirements of fry.

[0082] See Figure 14 , as an embodiment of the present invention, the central sewage suction device 5 includes a sewage suction box 56 with a sewage suction drain opening 55 at the bottom. A mesh plate 57 is provided in the sewage suction box 56. The second end of the sewage suction drain pipe 54 extends into the sewage suction box 56 and is located above the mesh plate 57. The water flow in the sewage suction drain pipe 54 is discharged into the sewage suction box 56. Among them, the fry sucked up by the central sewage suction pipe 52 fall on the mesh plate 57, while the water body, impurities, etc. pass through the mesh plate 57 and are discharged from the sewage suction drain opening 55 of the sewage suction box 56, realizing the recovery of fry and avoiding waste of resources.

[0083] As an embodiment of the present invention, the central sewage suction device 5 includes a sediment separator 58. The sewage suction and drainage port 55 is connected to the sediment separator 58. The sewage suction and drainage port 55 discharges water body and impurities into the sediment separator 58. The impurities accumulate at the bottom of the sediment separator 58, while the water body is located at the top of the sediment separator 58, realizing the separation of impurities and water body. Preferably, a liquid supply pipe communicating with the external water tank 33 is provided at the top of the sediment separator 58. Through the liquid supply pipe, the water body in the sediment separator 58 flows into the external water tank 33, realizing the recycling and secondary utilization of the water body, improving the energy utilization rate, and reducing the use cost.

[0084] See Figure 15 and Figure 16 , as an embodiment of the present invention, a bottom drainage hole 21 is provided at the bottom of the inner cylinder 2. The central drainage assembly 6 includes a drainage connection pipe 61 provided at the bottom of the inner cylinder 2. The first end of the drainage connection pipe 61 covers and communicates with the bottom drainage hole 21. The second end of the drainage connection pipe 61 is connected to a drainage liquid retention member. The drainage liquid retention member includes a drainage inlet 62 at the bottom and a drainage outlet 63 at the top. The drainage inlet 62 is communicated with the drainage connection pipe 61, and the drainage outlet 63 is connected to the main drainage pipe 8. The water body in the inner cylinder 2 flows into the drainage connection pipe 61 from the bottom drainage hole 21 and enters the drainage liquid retention member from the drainage inlet 62. The water body accumulates in the drainage liquid retention member. The water level in the inner cylinder 2 and the height of the drainage outlet 63 are in the following two states:

[0085] State 1: That is, when the system is working normally, the water level in the inner cylinder 2 is higher than the drainage outlet 63, the water body in the drainage liquid retention member exceeds the drainage outlet 63, and is discharged from the drainage outlet 63, that is, the water in the inner cylinder 2 is discharged from the drainage outlet 63 for normal drainage;

[0086] State 2: That is, after the system is powered off, no water enters the inner cylinder 2. As the water body is discharged from the drainage outlet 63, the liquid level in the inner cylinder 2 gradually drops. When the liquid level in the inner cylinder 2 is lower than the height of the drainage outlet 63, the water body in the drainage liquid retention member is also lower than the height of the drainage outlet 63, that is, the water body in the inner cylinder 2 can no longer be discharged, realizing the stability of the water volume in the inner cylinder 2.

[0087] The present invention can control and adjust the water level in the inner cylinder 2 through the drainage liquid retention member, that is, keep the liquid level in the inner cylinder 2 below the drainage outlet 63, which can not only avoid the too high water level in the inner cylinder 2, but also avoid the phenomenon that the water in the inner cylinder 2 is drained dry after the system is powered off, avoid the risk of fish death in the inner cylinder 2, and improve the overall reliability and stability.

[0088] As an embodiment of the present invention, the central drainage assembly 6 includes a central drainage pipe 64 disposed inside 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 a 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 is in interference fit with the bottom drainage hole 21 through an elastic member, which can not only ensure the sealing between the central drainage pipe 64 and the bottom drainage hole 21, but also facilitate later maintenance operations. A plurality of mesh holes 641 are provided on the side wall of the central drainage pipe 64. The mesh holes 641 allow water bodies and impurities to pass through, while preventing fry from passing through. Through the central drainage pipe 64 with mesh holes 641 on its surface, the present invention can block fry during the drainage process, prevent the fry from being discharged together with the water flow from the bottom drainage hole 21, effectively isolate and restrict the fry, significantly improve the operation and maintenance efficiency of the breeding system, and further improve the overall reliability.

[0089] As an embodiment of the present invention, one end of the central drainage pipe 64 away from the drainage connection pipe 61 is blocked or one end of the central drainage pipe 64 away from the drainage connection pipe 61 extends above the water surface, which can prevent fry from entering from the end of the central drainage pipe 64 away from the drainage connection pipe 61, further realize the isolation and restriction of the fry, and further improve the working reliability.

[0090] As an embodiment of the present invention, a first drainage seal is provided between the central drainage pipe 64 and the bottom drainage hole 21. The first drainage seal can select 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. provided between the central drainage pipe 64 and the bottom drainage hole 21, which can further improve the sealing 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, cause unnecessary impacts on the breeding of fry, and improve the overall stability and reliability.

[0091] See Figure 17 , as an embodiment of the present invention, the drainage liquid retention member includes a drainage outer sleeve 65 communicating with the drainage connection pipe 61 and a drainage inner sleeve 66 inserted into 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 blocked with the side wall of the drainage inner sleeve 66. The drainage outlet 63 is provided 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 flow in the inner cylinder 2 enters the drainage outer sleeve 65 through the drainage connection pipe 61, 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 to complete the drainage.

[0092] As an embodiment of the present invention, the drain outlet 63 can be selected with a suitable position and structure according to specific usage requirements, such as the following two position structures:

[0093] Structure 1: The drain outlet 63 is the open top of the inner drain sleeve 66, and the water flow rises all the way to the top of the inner drain sleeve 66 and enters the inner drain sleeve 66 from the open top.

[0094] Structure 2: The drain outlet 63 is a drain overflow opening provided on the upper side wall of the inner drain sleeve 66. The water flow can enter the inner drain sleeve 66 when it rises to the drain overflow opening, without having to rise to the top of the inner drain sleeve 66.

[0095] As an embodiment of the present invention, 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 drain the water inside, the operator removes the inner drain sleeve 66, and the water in the inner cylinder 2 sequentially passes through the drain connection pipe 61 and the outer drain sleeve 65 and immediately enters the main drain pipe 8 for drainage, that is, the liquid level stabilization function inside the inner cylinder 2 is cancelled, and the inner cylinder 2 is quickly drained. The operation is simple. Preferably, according to specific usage requirements, the following two connection structures can be adopted between the inner drain sleeve 66 and the main drain pipe 8:

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

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

[0098] As an embodiment of the present invention, the inner drain sleeve 66 is replaceable and there are multiple of them. The lengths of the multiple inner drain sleeves 66 are different. According to specific usage requirements, the staff can adjust the water level in the inner cylinder 2 by replacing the inner drain sleeve 66 and selecting an inner drain sleeve 66 with a suitable length, which can meet the requirements of various water level heights and improve the overall scope of application.

[0099] As an embodiment of the present invention, a handle 661 is provided at the top of the inner drain sleeve 66. When the staff disassembles and installs the inner drain sleeve 66, the handle 661 can provide a force application point for the staff, making the disassembly and installation work easy and simple, and improving the convenience of disassembly and installation.

[0100] See Figure 18, as an embodiment of the present invention, the drainage and liquid retention member includes a drainage box body 68. The drainage inlet 62 is arranged at the bottom of the drainage box body 68, and the drainage outlet 63 is arranged at the top of the drainage box body 68. A quick drainage port 681 is further provided at the bottom of the drainage box body 68. A detachable drainage plugging member is arranged in the quick drainage port 681. When the liquid retention function is required, the drainage plugging member plugs the quick drainage port 681, and the water flow enters the drainage box body 68 from the drainage inlet 62 and then discharges from the drainage outlet 63. When the liquid retention function is not required, the drainage plugging member is disassembled, and the water flow discharges from the quick drainage port 681. Preferably, the drainage plugging member is provided with an external thread, and the quick drainage port 681 is provided with an internal thread. The drainage plugging member and the quick drainage port 681 are connected by threads. Preferably, a sealing glue is provided between the drainage plugging member and the quick drainage port 681, which can further improve the sealing performance between the drainage plugging member and the quick drainage port 681, avoid water leakage from the contact part of the two, and improve the overall working reliability and stability.

[0101] See Figure 19 , as an embodiment of the present invention, the side drainage assembly 7 includes a side drainage box 71 arranged on the outer side wall of the inner cylinder 2. Side drainage holes 72 are provided on the side wall of the inner cylinder 2, and the side drainage holes 72 communicate with the side drainage box 71. The side drainage box 71 is sequentially connected to a side drainage pipe 73 and a main drainage pipe 8. By setting the side drainage box 71 and the side drainage pipe 73, the overall drainage efficiency can be improved. When the water level in the inner cylinder 2 exceeds the side drainage holes 72, it will automatically enter the side drainage box 71 and be discharged, realizing automatic adjustment of the water level and automatic drainage. It can not only keep the water volume in the inner cylinder 2 and avoid the risk of water level overflow, but also does not require staff intervention control, which can reduce labor costs.

[0102] As an embodiment of the present invention, a movable drainage shutter 74 is provided on the side wall of the inner cylinder 2. The drainage shutter 74 shields the side drainage holes 72. The drainage shutter has the following three adjustment positions:

[0103] Position 1: The drainage shutter 74 is not in contact with the side drainage holes 72, that is, the side drainage holes 72 are entirely exposed inside the inner cylinder 2. At this time, the drainage flow rate is the largest;

[0104] Position 2: The drainage shutter 74 is in contact with some of the side drainage holes 72, that is, the drainage shutter 74 shields some of the side drainage holes 72. At this time, the shielding area of the side drainage holes 72 can be adjusted according to specific usage requirements, thereby adjusting the drainage flow rate;

[0105] Position 3: The drainage shutter 74 completely shields the side drainage holes 72. At this time, the water flow inside the inner cylinder 2 cannot enter the side drainage box 71 through the side drainage holes 72, that is, the side drainage function is closed at this time.

[0106] In the present invention, the movable drainage shutter 74 can not only open or close the side drainage holes 72, thereby controlling the opening or closing of the side drainage function, but also adjust the opening size of the side drainage holes 72, thereby controlling the drainage flow rate of the side drainage function. The control steps are simple, and the drainage shutter 74 is independently arranged, and will not interfere with other components during the movement process, thus causing unnecessary impacts, improving the overall working stability and reliability.

[0107] As an embodiment of the present invention, a plurality of side drainage tanks 71 are provided, which can further increase the overall drainage flow rate, and the number of side drainage tanks 71 can be appropriately increased or decreased according to specific usage requirements. The plurality of side drainage tanks 71 are evenly distributed, and the water in the inner cylinder 2 can flow into the corresponding side drainage tanks 71 evenly at multiple positions, realizing the uniformity of side drainage, and avoiding the uneven arrangement of the side drainage tanks 71. For example, if they are arranged too densely at a certain position, the side drainage flow rate at that position will be greater than that at other positions, and a water flow will be formed in the inner cylinder 2 from other positions to this dense position. This water flow will have a certain impact on the circulating water flow in the inner cylinder 2, thus having a certain impact on the ecological environment of the fry, and being unfavorable for the reproduction of the fry. Therefore, after the plurality of side drainage tanks 71 are evenly distributed, this water flow can be reduced or eliminated, thereby meeting the reproduction requirements of the fry.

[0108] See Figure 20 , as an embodiment of the present invention, adjacent side drainage tanks 71 are communicated, that is, a connecting pipeline is provided between adjacent side drainage tanks 71, and the adjacent side drainage tanks 71 are communicated through the connecting pipeline, so that the water bodies inside the adjacent side drainage tanks 71 can flow mutually through the connecting pipeline, thereby ensuring that the water levels in each side drainage tank 71 are the same, and avoiding that the side drain pipe 73 at the bottom of a certain side drainage tank 71 is blocked, resulting in too high a water level in this side drainage tank 71, and then causing the water body to overflow from this side drainage tank 71. Therefore, the adjacent side drainage tanks 71 are connected in a connected structure, which can avoid the phenomenon of water overflow in a single side drainage tank 71, thereby avoiding unnecessary impacts on the overall drainage.

[0109] See Figure 21 and Figure 22 , as an embodiment of the present invention, the side walls of adjacent side drainage tanks 71 are joined, and all the side drainage tanks 71 form a side drainage ring tank, which can further increase the usage area of the side drainage tanks 71, and further improve the drainage flow rate and drainage efficiency. Among them, the side drainage ring tank can adopt the following two structures:

[0110] Structure 1: The side walls of adjacent side drainage tanks 71 are joined together, and connection through-holes of the same size and mating with each other are provided on their respective side walls. The interior of adjacent two side drainage tanks 71 is communicated through the connection through-holes, thereby achieving the liquid level balance between them;

[0111] Structure 2: The tops and bottoms of adjacent side drainage tanks 71 are connected, and the side walls of all side drainage tanks 71 are removed, that is, all side drainage tanks 71 form an integral drainage ring tank, and the water body flows between all side drainage tanks 71 without being restricted by the side walls of the side drainage tanks 71.

[0112] As an embodiment of the present invention, a plurality of side drain pipes 73 are provided, which can further increase the overall drainage flow rate, and the number of side drain pipes 73 can be appropriately increased or decreased according to specific usage requirements. The plurality of side drain pipes 73 are uniformly arranged at the bottom or side walls of the side drainage ring tank, and can enable the water body in the side drainage ring tank to flow into the corresponding side drain pipes 73 evenly at multiple positions, realizing the uniformity of side drainage, and avoiding that due to the uneven arrangement of the side drain pipes 73, such as being too dense at a certain position, the side drainage flow rate at that position is greater than the side drainage flow rates at other positions, and a water flow from other positions to this dense position will be formed in the side drainage ring tank, and this water flow will collide with the side wall of the side drainage ring tank, resulting in excessive noise. Therefore, after the plurality of side drain pipes 73 are evenly distributed, the flow path of this water flow can be reduced, thereby reducing the collision force between this water flow and the side drainage ring tank, and further effectively reducing the noise.

[0113] As an embodiment of the present invention, the side drainage holes 72 are rectangular, and the long sides of the rectangle are horizontally arranged. Compared with circular drainage holes, when the water level in the inner cylinder 2 gradually rises, the rectangular structure of the side drainage holes 72 can effectively increase the contact area between the side drainage holes 72 and the water body, thereby effectively increasing the drainage flow rate and increasing the water change efficiency of the inner cylinder 2.

[0114] As an embodiment of the present invention, a filter screen 75 is provided in the side drainage holes 72, and the size of the filter screen 75 is smaller than the size of the fry, that is, the filter screen 75 allows the water body to flow through while preventing the fry from passing through, which can avoid the fry from entering the side drainage tank 71 and being discharged from the inner cylinder 2, effectively protecting, restricting and isolating the fry, and avoiding the waste of fry.

[0115] As an embodiment of the present invention, the side drainage tank 71 is arranged at the top of the inner cylinder 2, which can stabilize the water level in the inner cylinder 2 at a relatively high position, so that the amount of water in the inner cylinder 2 is sufficient, enabling more fry to be cultured, improving the utilization rate of the inner cylinder 2, and enhancing the fry culture efficiency. The side drain pipe 73 is connected to the bottom of the side drainage tank 71, and the side drain pipe 73 is located below the side drainage tank 71, which can not only reduce the occupation of horizontal space but also completely drain the water body in the side drainage tank 71, further improving the drainage efficiency and drainage capacity of the side drainage assembly 7. Preferably, the height of the side drainage tank 71 is h, and the height of the inner cylinder 2 is H, where h ≤ 0.5H, that is, the side drainage tank 71 is located above the height midline of the inner cylinder 2, which can ensure a certain height difference between the bottom of the side drainage tank 71 and the side drain pipe 73, improving the flow rate and efficiency of side drainage.

[0116] In summary, the present invention provides a fish pond, which adopts a structure where the inner tank 2 and the base 1 are stacked. The relevant pipelines of the drainage assembly are fixed and interconnected through the base 1, avoiding occupying underground space. Moreover, the pond body, the water inlet assembly 3, the sewage cleaning assembly, and the drainage assembly together form an integral whole, facilitating movement and handling, and improving the scope of application. The central sewage suction device 5 replaces the water pump through the Venturi effect, which can not only effectively reduce the overall working cost but also avoid the noise generated by the water pump, further meeting the breeding requirements of fry. An inner and outer pipe nested water inlet structure is adopted. Through the mutual cooperation of the inner water inlet pipe 34 and the outer water inlet pipe 35, when there is a water level fluctuation, the buffering effect of the outer water inlet pipe 35 can maintain a constant water pressure. Combined with the bottom plugging structure of the outer water inlet pipe 35 to form a secondary water flow distribution cavity, it ensures that the water flow entering the inner tank 2 is distributed in a fan-shaped diffusion manner, enabling the water flow velocity of each second water inlet hole 37 on the outer water inlet pipe 35 to be the same and the water outlet to be stable, achieving uniform water supply for the whole. A structure combining the surface sewage cleaning device 4 and the central sewage cleaning device 5 can clean the bottom and the water surface of the inner tank 2 simultaneously, effectively reducing the oil stains and impurities in the inner tank 2 and improving the water quality of the inner tank 2. The water level in the inner tank 2 can be controlled and adjusted through the drainage liquid retention part, that is, keeping the liquid level in the inner tank 2 below the drainage outlet 63, which can not only prevent the water level in the inner tank 2 from being too high but also avoid the phenomenon that the water in the inner tank 2 is drained dry after the system power-off, avoiding the risk of fish death in the inner tank 2 and improving the overall reliability and stability. By setting the side drainage tank 71 and the side drainage pipe 73, the overall drainage efficiency can be improved. When the water level in the inner tank 2 exceeds the side drainage hole 72, it will automatically enter the side drainage tank 71 and be discharged, realizing automatic water level adjustment and automatic drainage. It can not only maintain the water volume in the inner tank 2 and avoid the risk of water level overflow but also does not require staff intervention control, reducing labor costs. The movable drainage shutter 74 can not only open or close the side drainage hole 72 to control the opening or closing of the side drainage function but also adjust the opening size of the side drainage hole 72 to control the drainage flow rate of the side drainage function. The control steps are simple, and the drainage shutter 74 is independently set and will not interfere with other components during movement, thus avoiding unnecessary impacts and improving the overall working stability and reliability.

[0117] It should be emphasized that the above are only the preferred embodiments of the present invention, and there is no any form of limitation to the present invention. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fishpond, characterized in that, Comprising: A pool body, the pool body includes a base (1) and an inner cylinder (2) provided on the base (1). The base (1) has an internal accommodation space, and the top of the inner cylinder (2) is open; An inlet water assembly (3), the inlet end of the inlet water assembly (3) is connected to an external water tank (33), and the outlet end of the inlet water assembly (3) extends into the inner cylinder (2); A sewage cleaning assembly, the sewage cleaning assembly is arranged on the side wall of the inner cylinder (2). The sewage cleaning assembly includes a surface sewage cleaning device (4) for cleaning oil stains on the water surface and a central sewage suction device (5) for cleaning bottom sediments. The central sewage suction device (5) includes a Venturi tube (51), a central sewage suction pipe (52), a sewage suction water supply pipe (53) and a sewage suction drain pipe (54). The first end of the sewage suction water supply pipe (53) is connected to the external water tank (33), the second end of the sewage suction water supply pipe (53) is connected to the inlet end of the Venturi tube (51), the first end of the sewage suction drain pipe (54) is connected to the outlet end of the Venturi tube (51), the first end of the central sewage suction pipe (52) extends into the bottom of the inner cylinder (2), and the second end of the central sewage suction pipe (52) is connected to the vacuum end of the Venturi tube (51); A drainage assembly, the drainage assembly includes a central drainage assembly (6) arranged at the bottom of the inner cylinder (2), a side drainage assembly (7) arranged on the side wall of the inner cylinder (2), and a main drain pipe (8) arranged outside the base (1). The main drain 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) and enters the accommodation space, and extends out from the side wall of the base (1) to be connected to the main drain pipe (8).

2. The fishpond according to claim 1, wherein The inlet water assembly (3) includes an inlet water fixing frame (31) arranged on the outer side wall of the inner cylinder (2) and an inlet water connecting pipe (32) arranged on the inlet water fixing frame (31). The first end of the inlet water connecting pipe (32) is connected to the external water tank (33), and the second end of the inlet water connecting pipe (32) is connected to an inlet pipe, and the inlet pipe extends into the inner cylinder (2).

3. The fishpond according to claim 2, characterized in that, The inlet pipe includes an inlet water inner pipe (34) whose top is connected to the inlet water connecting pipe (32) and an inlet water outer pipe (35) sleeved outside the inlet water inner pipe (34). There is a gap between the inlet water outer pipe (35) and the inlet water inner pipe (34). The bottom of the inlet water outer pipe (35) is blocked, the top between the inlet water outer pipe (35) and the inlet water inner pipe (34) is blocked, and a number of first inlet holes (36) are provided on the inlet water inner pipe (34), and a number of second inlet holes (37) are provided on the inlet water outer pipe (35).

4. The fishpond according to claim 1, characterized in that, The side wall of the inner cylinder (2) is provided with a cleaning and sewage discharging through hole. The surface cleaning device (4) includes a connecting part (41) inserted into the cleaning and sewage discharging through hole, a cleaning part (42) arranged at the first end of the connecting part (41), and a sewage discharging part (43) arranged at the second end of the connecting part (41). The cleaning part (42) is arranged inside the inner cylinder (2), and the sewage discharging part (43) is arranged outside the inner cylinder (2) and connected to the total drain pipe (8). At least one cleaning hole (44) is provided on the cleaning part (42).

5. The fishpond according to claim 4, characterized in that, The first end of the connecting part (41) is connected to the middle of the cleaning part (42). Both ends of the cleaning part (42) are blocked. A plurality of the cleaning holes (44) are provided on the side wall of the cleaning part (42), and the plurality of cleaning holes (44) are arranged in a third array.

6. The fish pond according to claim 1, characterized in that, The bottom of the inner cylinder (2) is provided with a bottom drainage hole. The central drainage assembly (6) includes a drainage connecting pipe (61) arranged inside the base (1). The first end of the drainage connecting pipe (61) covers and communicates with the bottom drainage hole. The second end of the drainage connecting pipe (61) extends out of the side wall of the base (1) and is connected to the total drain pipe (8). A drainage liquid retaining member is arranged between the drainage connecting pipe (61) and the total drain pipe (8). The drainage liquid retaining member includes a drainage inlet (62) at the bottom and a drainage outlet (63) at the top. The drainage inlet (62) is communicated with the drainage connecting pipe (61), and the drainage outlet (63) is connected to the total drain pipe (8).

7. The fishpond according to claim 6, wherein The central drainage assembly (6) includes a central drain pipe (64) arranged inside the inner cylinder (2). One end of the central drain pipe (64) is inserted into the bottom drainage hole, and a plurality of mesh holes (641) are provided on the side wall of the central drain pipe (64).

8. The fishpond according to claim 6, wherein, The drainage liquid retaining member includes a drainage outer sleeve pipe (65) communicated with the drainage connecting pipe (61) and a drainage inner sleeve pipe (66) inserted into the drainage outer sleeve pipe (65). A drainage channel (67) is arranged between the drainage inner sleeve pipe (66) and the drainage outer sleeve pipe (65). The bottom end of the drainage outer sleeve pipe (65) is blocked with the side wall of the drainage inner sleeve pipe (66). The drainage outlet (63) is arranged at the top of the drainage inner sleeve pipe (66). The bottom of the drainage inner sleeve pipe (66) is communicated with the total drain pipe (8), and the drainage outlet (63) is lower than the top end of the drainage outer sleeve pipe (65).

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

10. The fishpond according to claim 9, characterized in that, A movable drainage shutter (74) is provided on the side wall of the inner cylinder (2), and the drainage shutter (74) shields the side drainage hole (72).

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