Plecoglossus altivelis fry rearing device convenient for water change and cleaning

Abstract

The invention discloses a plecoglossus altivelis fry rearing device convenient for water changing and cleaning, which comprises a fry rearing pond, a V-shaped precipitation tank is arranged at the bottom of the fry rearing pond, a blow-off pipe with holes is arranged at the bottom of the V-shaped precipitation tank, and a vertical partition plate is upwards arranged on the blow-off pipe; a circulating water tank is arranged at the upper part of one end of the nursery pond and is internally divided into a disinfection cavity and a heating cavity which are communicated with each other, a plurality of ultraviolet disinfection pipes are arranged in the disinfection cavity, an electric heating pipe is arranged in the heating cavity, and a water outlet for communicating the disinfection cavity with the nursery pond is formed in the circulating water tank; a seawater access port, a fresh water access port and a circulating water access port which are communicated with the heating cavity are outwards formed in one side, far away from the nursery pond, of the circulating water tank; and a circulating pump for communicating the nursery pond with the heating cavity is mounted below the circulating water tank of the nursery pond. The device has the function of adjusting the salinity of sea water and fresh water, the salinity of fry breeding water can be accurately controlled, dirt in the pond can be conveniently cleaned, and a healthier environment can be created for fry breeding.

Description

Technical Field

[0001] The invention relates to the technical field of fish breeding devices, and in particular to a sweetfish fry breeding device which is convenient for water changing and cleaning. Background Art

[0002] Ayu (Plecoglossus altivelis) belongs to the genus Plecoglossus, family Plecoglossidae, suborder Osmeroidei, order Salmoniformes. Ayu is a small bilaterian migratory fish that lives in coastal mountain rivers. Adult fish are 15-20 cm long and weigh 60-120 grams. They have a long and flat body, a small head and a pointed mouth, a gray-black back, and a silvery white abdomen. In the wild, the life cycle is usually only one year. Eggs are laid in the lower reaches of the river in October and hatch about two weeks later. The yolk sac larvae drift to the coastal waters and stay at the estuary junction throughout the larval and juvenile stage. In March of the second year, the juveniles return to freshwater areas and complete their growth and reproduction in the upper reaches of the river.

[0003] At present, the artificial large-scale breeding of sweetfish has been realized. The breeding process is that after the parent fish is artificially fertilized by dry method, the fertilized eggs are hatched in fresh water for 7-10 days, and the hatched fry are cultivated in seawater (salinity 13ppm), fed with rotifers, Artemia nauplii, and granular compound feed. When the fry are more than 4.5cm long and covered with scales, they can be desalinated at a salinity range of 8 to 10 every day until the salinity is 0. Therefore, the allocation of seawater and freshwater during the entire sweetfish fry stage, as well as the ecological water exchange during the breeding period, play an important role in the large-scale breeding of sweetfish.

[0004] At present, the actual seedling breeding pond design is simple, without considering the allocation of sea water and fresh water salinity. The only way is to pump the prepared seawater from the reservoir through a pump, which is time-consuming and labor-intensive, and there is no way to accurately determine the salinity of the seedling breeding water. Summary of the invention

[0005] The purpose of the present invention is to provide a sweetfish fry cultivation device which is convenient for water exchange and cleaning, has the function of adjusting the salinity of sea water and fresh water, can accurately control the salinity of the fry water, and is also convenient for cleaning the dirt in the pool, so as to create a healthier environment for fry cultivation.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A sweetfish seedling cultivation device that is convenient for water replacement and cleaning, comprising a seedling breeding pond, characterized in that: the bottom of the seedling breeding pond is concave downward to form a V-shaped sedimentation tank arranged along the length direction thereof, the bottom of the V-shaped sedimentation tank is provided with a sewage pipe arranged along the length direction thereof, one end of the sewage pipe extends out of the seedling breeding pond, the end of the sewage pipe extending out of the seedling breeding pond is detachably connected with a sealing plug, a vertical partition plate is arranged upwardly on the sewage pipe, gaps are left between the two ends of the vertical partition plate and the inner wall of the seedling breeding pond, and the sewage pipe is provided with a plurality of sewage holes distributed along its length on both sides of the vertical partition plate;

[0008] A circulating water tank is arranged at the upper part of one end of the seedling raising pool, and the circulating water tank is divided into a disinfection chamber close to the seedling raising pool and a heating chamber far away from the seedling raising pool, a plurality of ultraviolet disinfection tubes are arranged in the disinfection chamber, an electric heating tube is arranged in the heating chamber, a water outlet for the disinfection chamber to communicate with the seedling raising pool is provided in the circulating water tank, the disinfection chamber is communicated with the heating chamber through a conduction port, the conduction port and the water outlet are respectively located on both sides of the vertical partition plate, a seawater inlet, a fresh water inlet and a circulating water inlet which are all communicated with the heating chamber are arranged outwardly on the side of the circulating water tank far away from the seedling raising pool, and solenoid valves are arranged on the seawater inlet and the fresh water inlet, a circulating pump is installed in the seedling raising pool below the circulating water tank, a water outlet hole which is communicated with the inlet end of the circulating pump is provided on the side wall of the seedling raising pool, the outlet end of the circulating pump is communicated with the circulating water inlet through a circulating pipe, and a seawater salinity sensor is arranged in the heating chamber.

[0009] By adopting the above technical solution, when seawater needs to be added to the nursery pond, the seawater inlet is connected to high-salinity seawater, and fresh water is connected through the fresh water inlet. According to the required salinity, the seawater salinity sensor detects the salinity of the water in the heating chamber in real time to control the opening degree of the two solenoid valves, control the inflow of seawater and fresh water, and adjust the required concentration of nursery water;

[0010] After the seedling water passes through the heating chamber, it is heated to maintain the water temperature required by the fry. After the seedling water is introduced into the disinfection chamber through the guide port, the water is sterilized and disinfected in the disinfection chamber through the ultraviolet disinfection tube, and finally flows into the seedling pool through the water outlet until the seedling pool is filled with water;

[0011] During the fry cultivation process, water is continuously pumped from the nursery pond through a circulation pump and circulated through the heating chamber for heating, disinfected through the disinfection chamber, and finally injected into the nursery pond through the water outlet. During the water injection process, the water flow is pushed to flow in a circular shape around the vertical partition plate, and the flowing water can increase the oxygen content in the water;

[0012] The vortex flow of water helps the remaining bait and feces to settle down to the bottom of the V-shaped sedimentation tank under the action of the vortex. The sealing plug is opened regularly to drain the sewage, and the sewage in the V-shaped sedimentation tank is sucked out through the sewage hole on the sewage pipe.

[0013] During the fry cultivation process, water is discharged through the sewage pipe and seawater is reallocated through the seawater inlet and the freshwater inlet to gradually dilute the salinity of the fry water until the salinity is 0, thereby achieving ecological water exchange during the fry cultivation period.

[0014] The present invention is further configured as follows: an aeration nozzle is provided at one end of the seedling raising pond away from the circulating water tank, a plurality of aeration holes are provided on the side of the aeration nozzle facing the circulating water tank, the aeration nozzle and the water outlet are respectively located on both sides of the vertical partition plate, an aeration pump is provided outside the seedling raising pond, and the outlet end of the aeration pump is connected to the aeration nozzle through an air supply pipe.

[0015] The present invention is further configured such that each aeration hole on the aeration nozzle is arranged to be inclined downward.

[0016] The present invention is further configured as follows: an isolation net layer is provided at the bottom of the seedling raising pond above the sewage pipe.

[0017] The present invention is further configured as follows: both sides of the sewage pipe in the V-shaped sedimentation tank are inclined surfaces in contact with the inner walls on both sides, and each sewage hole is arranged on the corresponding inclined surface.

[0018] The present invention is further configured as follows: the inner wall of the seedling raising pool is provided with an isolation mesh cover covering the water outlet.

[0019] The present invention is further configured as follows: a temperature sensor is provided in the seedling raising pond.

[0020] The present invention is further configured as follows: a seawater salinity sensor, a pH sensor, and a DO sensor are arranged in the seedling breeding pond.

[0021] In summary, the present invention has the following beneficial effects:

[0022] First, the present invention automatically adjusts the water entering the nursery pond according to the salinity requirements, so that the nursery water can meet the needs of the sweetfish seedlings, and the operation is simple. It only needs to connect high-salinity seawater and fresh water with fixed salinity at the same time. There is no need to re-adjust the salinity every time the salinity is changed. It is more convenient and labor-saving, and it is easy to obtain the accurate salinity of the nursery water.

[0023] Secondly, when the nursery pond of the present invention is in use, water is continuously pumped out for circulation, so that the nursery water is circulated, heated and disinfected, ensuring that the temperature of the nursery water always remains at an optimal temperature. After the water is sterilized and disinfected, it can effectively prevent fish fry diseases and provide a healthy water environment for fish fry cultivation.

[0024] Third, water injection during the water circulation process can push the water to flow in a circular shape around the vertical partition plate. The vortex-flowing water helps the remaining bait and feces to settle downward to the bottom of the V-shaped sedimentation tank under the action of the vortex, achieving a continuous vortex sewage collection effect, facilitating regular sewage discharge through the sewage pipe, making sewage discharge more convenient.

[0025] Fourthly, when discharging sewage from the sewage pipe, the nursery pond is continuously supplemented with automatically prepared seawater with a lower concentration, which can continuously and slowly reduce the salinity of the nursery water, so that the fry can more naturally transition from salt water to fresh water survival, and the transition is smoother, which can effectively reduce the stress caused by the fry during the transition. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 Used to show the internal structure of the nursery pond;

[0028] Figure 3 Used to show the internal structure of the V-shaped sedimentation tank;

[0029] Figure 4 It is a partial cross-sectional view used to show the internal structure of the circulating water tank.

[0030] In the figure: 1. nursery pond; 11. V-shaped sedimentation tank; 12. isolation net layer; 13. vertical partition plate; 14. isolation net cover; 2. sewage pipe; 21. sealing plug; 22. sewage hole; 3. circulating water tank; 31. disinfection chamber; 32. heating chamber; 33. ultraviolet disinfection tube; 34. electric heating tube; 35. water outlet; 36. conduction port; 37. seawater inlet; 38. fresh water inlet; 39. circulating water inlet; 4. solenoid valve; 5. circulating pump; 51. circulating pipe; 61. seawater salinity sensor; 62. temperature sensor; 63. pH sensor; 64. DO sensor; 7. aeration nozzle; 71. aeration hole; 72. aeration pump; 73. gas pipe. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0032] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" 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, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example, see Figure 1-4 A device for cultivating sweetfish fry that is convenient for water exchange and cleaning comprises a nursery pond 1. The bottom of the nursery pond 1 is concave downward to form a V-shaped sedimentation trough 11 arranged along its length direction. A sewage pipe 2 arranged along its length direction is arranged at the bottom of the V-shaped sedimentation trough 11. One end of the sewage pipe 2 extends out of the nursery pond 1. A sealing plug 21 is detachably connected to the end of the sewage pipe 2 extending out of the nursery pond 1. An isolation net layer 12 is arranged above the sewage pipe 2 at the bottom of the nursery pond 1 so that fry cannot pass through. Residual bait and feces can pass through the isolation net layer 12 and fall into the V-shaped sedimentation trough 11. A vertical partition plate 13 is arranged upwardly on the sewage pipe 2, and gaps are left between the two ends of the vertical partition plate 13 and the inner wall of the seedling pool 1, so that the water in the seedling pool 1 can flow in a circular shape. Both sides of the sewage pipe 2 in the V-shaped sedimentation tank 11 are inclined surfaces in contact with the inner walls on both sides, and the sewage pipe 2 is provided with a plurality of sewage holes 22 distributed along its length on the inclined surfaces on both sides of the vertical partition plate 13.

[0036] A circulating water tank 3 is provided at the upper part of one end of the seedling pool 1. The circulating water tank 3 is divided into a disinfection chamber 31 close to the seedling pool 1 and a heating chamber 32 away from the seedling pool 1. A plurality of ultraviolet disinfection tubes 33 are provided in the disinfection chamber 31, and the water entering the disinfection chamber 31 is sterilized and disinfected by the ultraviolet disinfection tubes 33. An electric heating tube 34 is provided in the heating chamber 32 for quickly heating the water passing through the heating chamber 32. The circulating water tank 3 is provided with a water outlet 35 for connecting the disinfection chamber 31 with the seedling pool 1. The disinfection chamber 31 is connected with the heating chamber 32 through a conducting port 36. The conducting port 36 and the water outlet 35 are respectively located on both sides of the vertical partition plate 13, so that the water flows in the heating chamber 32 and the disinfection chamber 31 in an S shape, so that it can be fully heated and disinfected.

[0037] A seawater inlet 37, a freshwater inlet 38 and a circulating water inlet 39 are arranged outwardly on the side of the circulating water tank 3 away from the nursery pool 1, all of which are connected to the heating chamber 32. A solenoid valve 4 is arranged on the seawater inlet 37 and the freshwater inlet 38. A circulating pump 5 is installed below the circulating water tank 3 in the nursery pool 1. A water outlet hole (not shown) connected to the inlet end of the circulating pump 5 is opened on the side wall of the nursery pool 1. An isolation net cover 14 covering the water outlet hole is arranged on the inner wall of the nursery pool 1 to prevent the fry from being sucked away by the circulating pump 5. The circulating pump 5 The outlet end is connected to the circulating water inlet 39 through a circulating pipe 51, and a seawater salinity sensor 61 is arranged in the heating chamber 32. When seawater and fresh water are respectively introduced through the seawater inlet 37 and the fresh water inlet 38, they can be mixed in the heating chamber 32, which is convenient for controlling the salinity of the seedling water. A temperature sensor 62, a seawater salinity sensor 61, a pH sensor 63 and a DO sensor 64 are arranged in the seedling pool 1, and the electric heating tube 34 is controlled to work according to the detected temperature, so as to accurately control the temperature of the seedling water.

[0038] An aeration nozzle 7 is provided at one end of the nursery pond 1 away from the circulating water tank 3. A plurality of aeration holes 71 are provided on the side of the aeration nozzle 7 facing the circulating water tank 3. Each aeration hole 71 on the aeration nozzle 7 is inclined downward to increase thrust and help oxygen dissolve in water. The aeration nozzle 7 and the water outlet 35 are respectively located on both sides of the vertical partition plate 13. Aeration through the aeration nozzle 7 and circulating water flowing out of the water outlet 35 can make the nursery water flow in a ring shape around the vertical partition plate 13, which helps the residual bait and feces to settle downward to the bottom of the V-shaped sedimentation tank 11 in the middle under the action of vortex. An aeration pump 72 is provided outside the nursery pond 1, and the outlet end of the aeration pump 72 is connected to the aeration nozzle 7 through an air pipe 73.

[0039] Working principle: When seawater needs to be added to the nursery pond 1, the seawater inlet 37 is connected to high-salinity seawater, and fresh water is connected through the fresh water inlet 38. According to the required salinity, the seawater salinity sensor 61 detects the salinity of the water in the heating chamber 32 in real time to control the opening degree of the two solenoid valves 4, control the inflow of seawater and fresh water, and adjust the required concentration of nursery water;

[0040] After the seedling water passes through the heating chamber 32, the seedling water is heated to maintain the water temperature required by the fry. After the seedling water is introduced into the disinfection chamber 31 through the conduction port 36, the water is sterilized and disinfected in the disinfection chamber 31 through the ultraviolet disinfection tube 33, and finally flows into the seedling pool 1 through the water outlet 35 until the seedling pool 1 is filled with water.

[0041] During the fry cultivation process, water is continuously pumped from the nursery pond 1 through the circulation pump 5 to circulate through the heating chamber 32 for heating, and then disinfected through the disinfection chamber 31, and finally injected into the nursery pond 1 through the water outlet 35, and the aeration pump 72 works to spray air into the water in the nursery pond 1 from the aeration hole 71 through the aeration nozzle 7, thereby increasing the oxygen content in the nursery water. During the process, water is injected through the water outlets 35 at both ends and aeration is performed through the aeration nozzle 7, thereby pushing the nursery water to flow in a ring shape around the vertical partition plate 13, thereby further increasing the oxygen content in the water.

[0042] The vortex flow of water helps the residual bait and feces to settle downward to the bottom of the V-shaped sedimentation tank 11 under the action of the vortex. The sealing plug 21 is opened regularly to discharge the sewage, and the sewage in the V-shaped sedimentation tank 11 is sucked out through the sewage hole 22 on the sewage pipe 2;

[0043] During the fry cultivation process, water is discharged through the sewage pipe 2, and seawater is redistributed through the seawater inlet 37 and the freshwater inlet 38 to gradually dilute the salinity of the fry water until the salinity is 0, so as to achieve ecological water exchange during the fry cultivation period.

[0044] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A device for cultivating sweetfish fry that is convenient for water replacement and cleaning, comprising a frying pond (1), characterized in that: The bottom of the seedling raising pool (1) is recessed downward to form a V-shaped sedimentation tank (11) arranged along its length direction; the bottom of the V-shaped sedimentation tank (11) is provided with a sewage pipe (2) arranged along its length direction; one end of the sewage pipe (2) extends out of the seedling raising pool (1); the end of the sewage pipe (2) extending out of the seedling raising pool (1) is detachably connected to a sealing plug (21); a vertical partition plate (13) is arranged upwardly on the sewage pipe (2); gaps are left between the two ends of the vertical partition plate (13) and the inner wall of the seedling raising pool (1); and a plurality of sewage holes (22) distributed along its length are opened on both sides of the vertical partition plate (13); A circulating water tank (3) is arranged at the upper part of one end of the seedling raising pool (1), and the circulating water tank (3) is divided into a disinfection chamber (31) close to the seedling raising pool (1) and a heating chamber (32) far from the seedling raising pool (1). The disinfection chamber (31) is provided with a plurality of ultraviolet disinfection tubes (33), and the heating chamber (32) is provided with an electric heating tube (34). The circulating water tank (3) is provided with a water outlet (35) for connecting the disinfection chamber (31) with the seedling raising pool (1). The disinfection chamber (31) and the heating chamber (32) are connected via a conduction port (36), and the conduction port (36) and the water outlet (35) are respectively located on both sides of the vertical partition plate (13). The circulating water tank (3) is provided with a seawater inlet (37), a freshwater inlet (38) and a circulating water inlet (39) which are all connected to the heating chamber (32) on the side away from the nursery pool (1). The seawater inlet (37) and the freshwater inlet (38) are both provided with a solenoid valve (4). The nursery pool (1) is provided with a circulating pump (5) below the circulating water tank (3). The side wall of the nursery pool (1) is provided with a water outlet hole which is connected to the inlet end of the circulating pump (5). The outlet end of the circulating pump (5) is connected to the circulating water inlet (39) through a circulating pipe (51). A seawater salinity sensor (61) is provided in the heating chamber (32).

2. The device for cultivating sweetfish fry that is convenient for water change and cleaning according to claim 1, characterized in that: An aeration nozzle (7) is arranged at one end of the nursery pond (1) away from the circulating water tank (3); a plurality of aeration holes (71) are provided on the side of the aeration nozzle (7) facing the circulating water tank (3); the aeration nozzle (7) and the water outlet (35) are respectively located on both sides of the vertical partition plate (13); an aeration pump (72) is arranged outside the nursery pond (1); and an outlet end of the aeration pump (72) is connected to the aeration nozzle (7) via an air supply pipe (73).

3. The device for cultivating sweetfish fry that is convenient for water change and cleaning according to claim 2, characterized in that: Each aeration hole (71) on the aeration nozzle (7) is arranged to be inclined downward.

4. The device for cultivating sweetfish fry that is convenient for water change and cleaning according to claim 1, characterized in that: An isolation net layer (12) is provided at the bottom of the nursery pond (1) above the sewage discharge pipe (2).

5. The device for cultivating sweetfish fry that is convenient for water change and cleaning according to claim 1 is characterized in that: Both sides of the sewage pipe (2) in the V-shaped sedimentation tank (11) are inclined surfaces in contact with the inner walls on both sides, and each sewage hole (22) is arranged on a corresponding inclined surface.

6. The device for cultivating sweetfish fry that is convenient for water change and cleaning according to claim 1, characterized in that: The inner wall of the seedling raising pool (1) is provided with an isolation mesh cover (14) covering the water outlet.

7. The device for cultivating sweetfish fry that is convenient for water change and cleaning according to claim 1, characterized in that: A temperature sensor (62) is arranged inside the seedling raising pond (1).

8. The device for cultivating sweetfish fry that is convenient for water change and cleaning according to claim 1, characterized in that: The seedling raising pond (1) is provided with a seawater salinity sensor (61), a pH sensor (63), and a DO sensor (64).

Images