Aquaculture seedling barrel for eliminating noise

Abstract

This invention belongs to the field of fish aquaculture technology, and specifically relates to a noise-eliminating aquaculture seedling tank. It includes a tank body, a top cover, a shelf layer, an automatic drainage limiting device, and a water inlet and drainage system. The side walls of the tank body are a sandwich structure with annular cavities. The top cover is located at the top of the tank body. The water inlet and drainage system is located at the bottom of the tank body, supplying water and discharging wastewater. The shelf layer is detachably installed on the inner bottom of the tank body and is used for the incubation of sinking fertilized fish eggs. The automatic drainage limiting device is installed on the upper inner side of the tank body, used for limiting the water level and automatically draining water from the tank. This invention effectively reduces the negative impact of external noise on the fish cultured inside the tank, avoiding the impact of noise on the incubation of fertilized fish eggs and newly hatched fry. Simultaneously, it achieves automatic limiting and drainage functions, ensuring the growth and development of embryos and fry in good water quality, and improving the efficiency of factory-scale seedling breeding.

Description

Technical Field

[0001] The invention belongs to the technical field of artificial fish breeding, and in particular relates to an aquaculture seedling barrel for eliminating noise. Background Art

[0002] With the continuous development of human industrial civilization, man-made noise caused by human activities has become the main source of underwater noise. Fish affected by chronic (continuous) or acute (short-term) noise will have temporary / permanent hearing loss and damage to the inner ear auditory epithelial cells. It can also cause fish to be in a state of stress and increase their metabolic costs. Long-term noise exposure will also cause fish to grow slower, foraging ability and reproductive capacity to decline, increase the risk of disease infection, and some high-intensity noise will directly cause fish death.

[0003] Factory-scale recirculating aquaculture systems have broad application prospects in intensive aquaculture due to their environmental friendliness, high efficiency, and low energy consumption. Intensive aquaculture systems include equipment such as water pumps, aeration devices, microfilters, biofilters, and disinfection devices. The operation of these devices greatly increases the noise level in the aquaculture environment. Studies have shown that the frequency of relevant environmental noise is mainly below 2000Hz, and the sound pressure level is mainly between 100 and 150dB re 1μPa (RMS), which is consistent with the hearing range of most bony fish. In recirculating aquaculture systems, high-density fish are confined in a limited space, which will cause them to be affected by underwater noise more seriously than in natural waters.

[0004] The early life stages of fish are easily affected by environmental factors, especially during the embryonic development stage, which is more sensitive. Fish already have hearing functions during the embryonic period, and their hearing improves as they develop. Due to their small size and rapid development, embryos are very sensitive to stressors in the environment, which can have adverse effects on nerves, sensation, morphological development, etc., and thus affect the growth and survival of farmed fish. At present, the factory-based seedling breeding process focuses more on the effects of water temperature, salinity, pH, dissolved oxygen, light, and water environmental pollutants on the early development of farmed fish. There is less attention paid to the effects of noise on the hatching of fertilized eggs of farmed fish and newly hatched fry, and the corresponding sound insulation technology and measures are lacking.

[0005] At present, the water level in the aquaculture barrels required for artificial breeding is mainly limited by the limit tube. However, in the actual breeding process, the limit tube can only drain water from the water surface of the aquaculture barrel. A large amount of residual bait and feces accumulates at the bottom of the barrel, and produces harmful substances such as ammonia nitrogen after corruption and decomposition, which endangers the health of farmed fish. And if you want to empty the water in the barrel, you need to manually unplug the limit tube, clean it and plug it back in, which is cumbersome, time-consuming and labor-intensive. Therefore, creating a control technology to reduce the impact of factory noise on the hatching of fertilized eggs and newly hatched fry of farmed fish, saving labor costs, and inventing an aquaculture seedling barrel that can eliminate noise are technical and equipment issues that need to be urgently solved in factory fish seedling breeding. Summary of the invention

[0006] In view of the above problems, the object of the present invention is to provide a noise-eliminating aquaculture seedling barrel to achieve the functions of noise elimination and automatic limit drainage.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] The invention provides a noise-eliminating aquaculture seedling barrel, comprising: a barrel body, a top cover, a shelf layer, an automatic drainage limiting device and a water inlet and sewage system, wherein the side wall of the barrel body is a sandwich structure with an annular cavity, and the top cover is arranged on the top of the barrel body; the water inlet and sewage system is arranged at the bottom of the barrel body, and the water inlet and sewage system supplies water and discharges sewage to the barrel body; the shelf layer is detachably installed on the inner bottom of the barrel body, and the shelf layer is used for hatching sinking fertilized eggs of cultured fish; the automatic drainage limiting device is installed on the inner upper part of the barrel body, and the automatic drainage limiting device is used for limiting and automatically draining water in the barrel body.

[0009] The top and both side walls of the annular cavity of the barrel body are provided with porous foam material plates; the bottom of the annular cavity is provided with a bubble curtain generating device, which is used to generate a bubble curtain, and the bubble curtain and the porous foam material plates are used to isolate the noise outside the barrel.

[0010] The bubble curtain generating device comprises an annular aeration pipe and an air inlet pipe, wherein the annular aeration pipe is densely covered with tiny aeration holes, and the air inlet pipe penetrates the side wall of the barrel body and is connected with the annular aeration pipe.

[0011] The top cover is an upwardly protruding conical structure, and a porous foam material layer for sound insulation is provided on the inner wall of the top cover; a light source is provided on the inner side of the top cover, and a light source switch for controlling the light source is arranged on the outer side of the top cover.

[0012] The shelf layer comprises a shelf layer outer ring and a hatching net arranged on the shelf layer outer ring, wherein the shelf layer outer ring is connected to the inner wall of the barrel body;

[0013] The hatching net is a segmented structure, comprising a plurality of hatching units arranged at intervals, each hatching unit comprising a mesh and side baffles arranged on both sides of the mesh, and the side baffles prevent the fertilized eggs on the mesh from falling off.

[0014] The automatic drainage limiting device includes a drainage pipe, a connecting rod a, a connecting rod b, a floating ball, a limiting ring and a rubber plug, wherein the drainage pipe passes through the upper side wall of the barrel body, and the rubber plug is arranged at one end of the drainage pipe located in the barrel body; the limiting ring is arranged on the inner side of the upper end of the barrel body and is arranged opposite to the drainage pipe; one end of the connecting rod a is hinged to the drainage pipe through a pin shaft, and the other end passes through the limiting ring from bottom to top and is connected to the floating ball; one end of the connecting rod b is connected to the rubber plug, and the other end is connected to the connecting rod a; when the water surface in the barrel body causes the floating ball to float, the connecting rod a pulls the rubber plug through the connecting rod b, thereby opening the drainage pipe.

[0015] One end of the drain pipe located in the barrel body is a bell-shaped mouth, and the contracted end face of the bell-shaped mouth is provided with an inner drain hole with a diameter smaller than the diameter of the drain pipe; the rubber plug is connected to the inner drain hole to achieve the sealing of the drain pipe, and a drain port connected to the interior of the barrel body is provided on the side wall of the bell-shaped mouth, and a silk screen is provided on the drain port.

[0016] The barrel body is arranged on the base, and the bottom of the barrel body is a conical closing structure;

[0017] The water inlet and sewage system includes a water inlet pipe and a main sewage pipe, wherein the main sewage pipe is arranged at the bottom of the conical closing structure, and a main sewage pipe control valve is provided on the main sewage pipe; the water inlet pipe is connected to the main sewage pipe, and a water inlet pipe control valve is provided on the water inlet pipe.

[0018] The noise-eliminating aquaculture seedling barrel further comprises a water flow buffer device disposed in the barrel body and below the shelf layer;

[0019] The water flow buffer device includes a fixed ring and a plurality of blades arranged inside the fixed ring, wherein the fixed ring is connected to the inner wall of the barrel body, and both ends of each blade are rotatably connected to the fixed ring through a rotating shaft, and the two ends of the blade respectively correspond to an angle fixer installed on the fixed ring, and the angle fixer is used to limit the rotation angle of the blade.

[0020] The angle fixer comprises a fixing block, a limiting groove is arranged on the fixing block, and the fan blade is a slat-shaped structure, and the end portion is accommodated in the limiting groove of the fixing block.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] The noise-eliminating aquaculture seedling raising barrel provided by the present invention can effectively reduce the influence of noise outside the barrel on farmed fish in the barrel in a circulating water culture system, especially avoid the influence of noise on the hatching of fertilized eggs of farmed fish and newly hatched fry; the two functions of limiting and draining can be realized simultaneously through the automatic drainage limiting device, so as to ensure the growth and development of embryos and fry in good water quality and improve the efficiency of factory-based seedling breeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a noise-eliminating aquaculture seedling barrel of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the shelf layer in the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the water flow buffer device in the present invention;

[0026] Figure 4 It is a partial schematic diagram of the water inlet state of the water flow buffer device in the present invention;

[0027] Figure 5 It is a partial schematic diagram of the drainage state of the water flow buffer device in the present invention;

[0028] Figure 6 This is one of the structural schematic diagrams of the automatic drainage limit device in the present invention (closed state);

[0029] Figure 7 This is the second structural diagram of the automatic drainage limit device in the present invention (open state);

[0030] Figure 8 Graph showing the FFT analysis result of the background noise frequency in an embodiment of the present invention.

[0031] In the figure: 1-barrel body; 11-porous foam material plate; 12-groove; 2-bubble curtain generating device; 21-air inlet pipe; 3-top cover; 4-light source; 41-light source switch; 5-shelf layer; 51-shelf layer outer ring; 52-hatching net; 53-side baffle; 6-water flow buffer device; 61-fan blade; 62-fixing ring; 63-angle fixer; 64-rotating shaft; 7-automatic drainage limit device; 71-drain pipe; 72-connecting rod a; 73-connecting rod b; 74-floating ball; 75-limiting ring; 76-drain outlet; 77-inner drainage hole; 78-rubber plug; 79-pin shaft; 8-water inlet pipe; 81-water inlet pipe control valve; 9-main sewage pipe; 91-main sewage pipe control valve; 10-base. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The present invention provides a noise-eliminating aquaculture seedling barrel, which has the functions of noise elimination and automatic limit drainage, that is, in the early seedling stage of cultured fish, the influence of external noise on the early development of cultured fish is eliminated through the special structure of the barrel. Figure 1 As shown, the noise-eliminating aquaculture seedling barrel comprises a barrel body 1, a top cover 3, a shelf layer 5, an automatic drainage limit device 7 and a water inlet and sewage system, wherein the side wall of the barrel body 1 is a sandwich structure with an annular cavity, and the top cover 3 is arranged at the top of the barrel body 1; the water inlet and sewage system is arranged at the bottom of the barrel body 1, and the water inlet and sewage system supplies water and discharges sewage for the barrel body 1; the shelf layer 5 is detachably installed at the inner bottom of the barrel body 1, and can be flexibly removed and loaded and unloaded, and the shelf layer 5 is used for hatching sinking fertilized eggs of cultured fish. When arranging floating eggs of fish, the shelf layer 5 can be folded and removed; the automatic drainage limit device 7 is installed on the inner upper part of the barrel body 1, and the automatic drainage limit device 7 is used for limiting the water body in the barrel body 1 and automatically draining. The present invention forms an upward surge by inletting water from the bottom, thereby bringing water rich in dissolved oxygen to embryos and fry; in scenes such as a circulating aquaculture system, the sandwich structure of the barrel body 1 can isolate the noise outside the barrel, effectively reducing the negative impact of the noise outside the barrel on the farmed fish in the barrel, especially avoiding the impact of noise on the hatching of fertilized eggs of farmed fish and newly hatched fry; the automatic drainage limiter 7 can simultaneously realize the two functions of limiting and draining, ensuring the growth and development of embryos and fry in good water quality, and improving the efficiency of factory-based seedling breeding.

[0034] Furthermore, if Figure 1 As shown, the present invention provides a noise-eliminating aquaculture seedling barrel, in which porous foam material plates 11 are provided on the top and both side walls of the annular cavity of the barrel body 1, and a circle of tiny holes is provided on the upper part of the outer wall of the annular cavity to release the air escaping after the bubbles burst; a bubble curtain generating device 2 is provided at the bottom of the annular cavity, and the bubble curtain generating device 2 is used to generate a bubble curtain, and the bubble curtain and the porous foam material plate 11 are used to isolate the noise outside the barrel.

[0035] In the embodiment of the present invention, the bubble curtain generating device 2 includes an annular aeration pipe and an air inlet pipe 21, wherein the annular aeration pipe is a nano aeration pipe, which is densely covered with aeration holes with a pore size of 0.03-0.06 mm, and the annular aeration pipe is arranged at the bottom of the annular cavity of the barrel body 1, one end of the air inlet pipe 21 passes through the side wall of the barrel body 1 and is connected to the annular aeration pipe through a three-way joint, and the other end of the air inlet pipe 21 is connected to the air compressor. Preferably, the air inlet pipe 21 is a PVC pipe, and the air inlet pipe 21 is sealed and connected to the outer barrel wall to prevent water leakage.

[0036] Specifically, the annular cavity of the barrel wall of the barrel body 1 is filled with water. After the air compressor is turned on, air is filled into the annular aeration tube through the air inlet pipe 21. The air escapes from the aeration holes of the nano aeration tube, forming a bubble curtain inside the annular cavity. The bubble curtain and the porous foam material plate 11 both have good sound absorption effects. The bubbles collide with each other on the surface of the porous foam material plate 11, which can continuously refine the bubbles. At the same time, the porous foam material plate 11 has a supporting effect on the bubble curtain, which weakens the influence of the water flow on the bubble curtain. The combination of the two can better isolate the noise outside the barrel body 1. At the same time, the closed double-layer barrel wall structure isolates the noise generated by the bursting of bubbles and reduces the impact on fish.

[0037] like Figure 1 As shown, in the embodiment of the present invention, the top cover 3 is an upwardly protruding conical structure, and a porous foam material layer for sound insulation is provided on the inner side wall of the top cover 3; a light source 4 is provided on the inner side of the top cover 3, and a light source switch 41 for controlling the light source 4 is provided on the outer side of the top cover 3. The light source 4 is controlled by the light source switch 41 to provide the required light source for the growth of fish.

[0038] Furthermore, a groove 12 is provided at the top of the barrel wall of the barrel body 1, and the top cover 3 is snap-fitted with the groove 12. The top cover 3 slides in the groove 12 to realize opening or closing of the top cover 3, and the operation is convenient and quick.

[0039] like Figure 2 As shown, in the embodiment of the present invention, the shelf layer 5 includes a shelf layer outer ring 51 and a hatching net 52 arranged on the shelf layer outer ring 51, wherein the shelf layer outer ring 51 is connected to the inner wall of the barrel body 1; the hatching net 52 is a segmented structure, including a plurality of hatching units arranged at intervals, each hatching unit includes a mesh and side baffles 53 arranged on both sides of the mesh, and the side baffles 53 prevent the fertilized eggs on the mesh from falling off, or prevent the water flow from being too large and washing away the fish eggs from the side. Specifically, the hatching units are arranged at intervals, and the gap in the middle facilitates the smooth upflow of water to prevent the water flow from being too large and impacting the hatching units.

[0040] Specifically, the shelf layer 5 is fixed to the inner side of the barrel wall by a buckle, and is mainly suitable for hatching sinking fish eggs. It can be flexibly disassembled and loaded, and can be taken out regularly for cleaning. When sinking fish eggs are cultured in the barrel body 1, the fish eggs are concentrated on the hatching net 52 for hatching. The water flow can pass through the hatching net 52 to disturb the sinking eggs, preventing the occurrence of hypoxia and saprolegniasis caused by the accumulation of fish eggs; the hatching net 52 with different mesh sizes can be replaced according to the different sizes of fish eggs. Side baffles 53 are provided on both sides of the hatching net 52 to prevent excessive water flow from causing the fish eggs to slide into the water flow buffer device 6 or the sewage pipe 9 and cause damage. When floating fish eggs or fry are cultured in the barrel body 1, the shelf layer 5 can be taken out.

[0041] like Figure 6As shown, in the embodiment of the present invention, the automatic drainage limiting device 7 includes a drainage pipe 71, a connecting rod a72, a connecting rod b73, a floating ball 74, a limiting ring 75 and a rubber plug 78, wherein the drainage pipe 71 passes through the upper side wall of the barrel body 1 and is sealed with the barrel wall to prevent water leakage. The rubber plug 78 is arranged at one end of the drainage pipe 71 located inside the barrel body 1; the limiting ring 75 is arranged on the inner side of the upper end of the barrel body 1 and is arranged opposite to the drainage pipe 71; one end of the connecting rod a72 is hinged to the drainage pipe 71 through a pin shaft 79, and the other end passes through the limiting ring 75 from bottom to top and is connected to the floating ball 74; one end of the connecting rod b73 is connected to the rubber plug 78, and the other end is connected to the connecting rod a72; as shown in FIG. Figure 7 As shown, when the water level in the barrel body 1 causes the float 74 to float, the connecting rod a72 pulls the rubber plug 78 through the connecting rod b73, thereby opening the drain pipe 71. In other words, the float 74 drives the connecting rods a72 and b73 to rotate up and down as the water level in the barrel body 1 rises and falls, thereby stretching or restoring the rubber plug 78, thereby achieving the purpose of controlling the water level and draining water.

[0042] Furthermore, one end of the drain pipe 71 located inside the barrel body 1 is a bell-mouth, and the contracted end face of the bell-mouth is provided with an inner drain hole 77, the diameter of the inner drain hole 77 is smaller than the diameter of the drain pipe 71; the rubber plug 78 is a conical structure, and its small diameter end is connected to the inner drain hole 77 to achieve the sealing of the drain pipe 71; the large diameter end of the rubber plug 78 is sealed and connected to the outer end of the bell-mouth, and the side wall of the bell-mouth is provided with a drain port 76 connected to the interior of the barrel body 1.

[0043] Furthermore, silk screens with different mesh sizes can be selected according to the sizes of different fish eggs and fry to be covered on the drain outlet 76 to prevent the fish eggs and fry from escaping during the drainage process. Therefore, by designing one end of the drain pipe 71 as a bell mouth, and designing the inner drainage hole 77 and the drain outlet 76, fish can be prevented from escaping and the silk screen can be easily replaced.

[0044] Furthermore, the inner drain hole 77 is a protruding structure extending axially toward the rubber plug 78, which can shorten the docking distance between the rubber plug 78 and the inner drain hole 77 and increase the volume of the bell mouth, making it easier to seal or open the inner drain hole 77. When the connecting rod b73 pulls the rubber plug 78 to open the inner drain hole 77, the large diameter end of the rubber plug 78 is always sealed with the outer end of the bell mouth, so that the water in the barrel body 1 can only enter the cavity of the bell mouth at the end of the drain pipe 71 from the drain port 76, and then be discharged from the inner drain hole 77, thereby effectively ensuring that the fish eggs and fry in the barrel body 1 will not escape.

[0045] In the embodiment of the present invention, when the water level in the barrel body 1 is lower than the defined water level, the connecting rod a 72 is in a horizontal position, the fixing ring 75 clamps the floating ball 74, and the connecting rod b 73 has no stretching effect on the rubber plug 78, the rubber plug 78 blocks the inner drainage hole 77, and the barrel body is in a water storage state; when the water level in the barrel body is higher than the defined water level, due to the buoyancy, the floating ball 75 drives the connecting rod a 72 and the connecting rod b 73 to move upward, and the connecting rod b 73 pulls the rubber plug 78 outward, the inner drainage hole 77 is opened, and the water flows into the bell mouth through the drainage port 76, and then enters the drainage pipe 71 through the inner drainage hole 77, and the barrel body 1 is in a drainage state. The automatic drainage limiter 7 can realize the two functions of limiting and draining at the same time, which solves the current situation that only the limiting pipe can be used to limit the water level in the aquaculture barrel, saving a lot of manpower. At the same time, the automatic drainage speeds up the frequency of water changes in the nursery barrel, ensuring that the embryos and fry grow and develop in good water quality.

[0046] Furthermore, the barrel body 1 is arranged on the base 10, and the bottom of the barrel body 1 is a conical closing structure, so that the residual bait and feces are concentrated at the center of the bottom of the barrel and discharged, and the hatched fry can also be concentrated in the main sewage pipe and released for easy collection. The water inlet and sewage system includes a water inlet pipe 8 and a main sewage pipe 9, wherein the main sewage pipe 9 is arranged at the bottom of the conical closing structure, and the main sewage pipe 9 is provided with a main sewage pipe control valve 91, and the main sewage pipe control valve 91 is used to control the discharge of waste and collect hatched fry. The water inlet pipe 8 is connected to the main sewage pipe 9, and the water inlet pipe 8 is provided with a water inlet pipe control valve 81, and the water inlet pipe control valve 81 is used to control the on-off of water inlet and the size of water flow.

[0047] Furthermore, an oxygen cone is placed in front of the water inlet pipe 8 to continuously provide water rich in dissolved oxygen to the barrel 1, replacing the traditional form of aeration and oxygenation, and reducing the impact of noise generated by aeration on the growth and development of embryos and fry.

[0048] In the embodiment of the present invention, the water inlet and sewage system adopts the method of lower water inlet, and the water flows into the barrel body 1 through the water inlet pipe 8, forming an upward surge, bringing water rich in dissolved oxygen to the embryos and fry; for sinking fish eggs, the upward surge can flush the fish eggs to prevent water mold disease; for floating eggs, the upward surge can replace air stone aeration to reduce aeration noise.

[0049] On the basis of the above embodiments, the present invention provides a noise-eliminating aquaculture seedling barrel, further comprising a water flow buffer device 6 disposed in the barrel body 1 and below the shelf layer 5, so as to reduce the water flow impact and pressure on the fish body. Figure 1 shown.

[0050] like Figure 3-5As shown, in the embodiment of the present invention, the water flow buffer device 6 includes a fixing ring 62 and a plurality of blades 61 arranged inside the fixing ring 62, wherein the fixing ring 62 is connected to the inner wall of the barrel body 1, and both ends of each blade 61 are rotatably connected to the fixing ring 62 through a rotating shaft 64, so that the blade 61 can rotate freely around the rotating shaft 64. Both ends of the blade 61 correspond to an angle fixer 63 installed on the fixing ring 62, and the angle fixer 63 is used to limit the rotation angle of the blade 61.

[0051] In an embodiment of the present invention, the angle fixer 63 includes a fixed block mounted on the fixed ring 62, and a limiting groove is provided on the fixed block. The fan blade 61 is a slat-shaped structure, and the end is accommodated in the limiting groove of the fixed block. In this embodiment, the fixed block is a fan-shaped disc with a certain thickness, and the center of the fixed block coincides with the axis of the rotating shaft 64. Preferably, the angle of the upper limit groove of the fixed block is -30° to 90°, that is, the fan blade 61 is limited after being flipped upward to a vertical state, at which time the water flow is the largest; the maximum flip angle of the fan blade 61 is 120°, and the fan blade 61 plays a role in buffering the water flow.

[0052] Specifically, the water flow buffer device 6 can control the size of the water flow entering the barrel body 1 according to the needs of different fish eggs and fry, and then control the rotation angle of the fan blades 61 to reduce the impact of excessively fast water flow on fish eggs and fry; by controlling the rotation angle of the fan blades 61, the speed of the downstream water flow can also be slowed down when discharging sewage or collecting fish fry, reducing the impact and pressure on the fish body.

[0053] like Figure 4 As shown, when the water inlet pipe 8 is in the water inlet state, the fan blade 61 turns upward under the impact of the rising water flow. The angle fixer 63 allows the fan blade 61 to rotate upward by a maximum of 90°. According to the needs of different fish eggs and fry, the water flow size can be controlled by the water inlet pipe control valve 81, thereby controlling the degree of the fan blade 61 turning upward and the angle of the rising surge, so as to achieve the purpose of buffering the water flow. The water flows into the barrel 1 through the water inlet pipe 8, and forms an upward surge after passing through the water flow buffer device 6, bringing water rich in dissolved oxygen to the embryos and fry; for sinking fish eggs, the rising surge can wash the fish eggs to prevent water mold disease; for floating eggs, the rising surge can replace the air stone aeration to reduce the aeration noise.

[0054] like Figure 5 As shown, when the barrel 1 is in a drainage state, the angle holder 63 allows the fan blade 61 to rotate downward at a maximum of 30°, which slows down the flow of water when emptying dirt or collecting fry, thereby reducing the pressure of excessive water flow on embryos and fry.

[0055] Embodiment 1

[0056] The experiment was conducted in the nursery workshop of a certain aquatic product company in Weihai City. The traditional nursery barrel was selected as the control group, and the present invention was selected as the experimental group to test the noise reduction effect of the present invention. The main production equipment in the nursery workshop includes: air compressor, aerator, microfiltration machine, ultraviolet disinfection device, temperature control device. The control group was operated according to the existing process flow, and the experimental group was operated according to its design. No fish eggs or fry were cultured in the control group and the experimental group. A hydrophone was used to monitor the underwater noise during the operation of the control group and the experimental group. The FFT analysis results of the background noise frequency are shown as follows. Figure 8 The underwater noise sound pressure level of the control group was about 101dB, while that of the experimental group was about 79dB. 4 The noise sound pressure level between Hz is reduced more significantly than that of the control group, with a reduction of about 10-50%, indicating that the present invention has a better isolation effect on low-frequency and medium-frequency noise.

[0057] Embodiment 2

[0058] A series of preparatory work before hatching, such as disinfection of hatching buckets, was prepared according to the existing process flow, and the experiment was carried out in the nursery workshop of a certain aquatic product company in Weihai City. Three traditional nursery buckets treated with the same conditions were selected as the control group, and three of the present invention treated with the same conditions were selected as the experimental group. The water temperature was maintained at 25°C and the salinity was 28. The control group operated according to the existing process flow, and the experimental group operated according to its design. About 200,000 large yellow croaker fertilized eggs were placed in the six nursery buckets. After 26h incubation + 18 days of cultivation, the hatching rate of large yellow croaker fertilized eggs in the experimental group (82.5%) was significantly higher than that in the control group (61.4%). The average body length of large yellow croaker fry in the experimental group was 8.22mm (±0.85, 5.9-9.9mm), which was significantly higher than the average body length of large yellow croaker fry in the control group of 7.63mm (±0.98, 5.0-9.5mm).

[0059] The invention provides a noise-eliminating aquaculture seedling raising barrel, which creates a control technology for reducing the influence of factory noise on the hatching of fertilized eggs and newly hatched fry of farmed fish, saves labor costs, and improves the efficiency of factory-based fish seedling breeding.

[0060] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A noise-eliminating aquaculture seedling barrel, characterized in that: include: A barrel body (1), a top cover (3), a shelf layer (5), an automatic drainage limiting device (7), and a water inlet and drainage system, wherein the side wall of the barrel body (1) is a sandwich structure with an annular cavity, and the top cover (3) is arranged on the top of the barrel body (1); the water inlet and drainage system is arranged at the bottom of the barrel body (1), and the water inlet and drainage system supplies water and discharges sewage to the barrel body (1); the shelf layer (5) is detachably mounted on the inner bottom of the barrel body (1), and the shelf layer (5) is used for hatching sinking fertilized eggs of farmed fish; the automatic drainage limiting device (7) is mounted on the inner upper part of the barrel body (1), and the automatic drainage limiting device (7) is used for limiting the water body in the barrel body (1) and automatically draining the water; The automatic drainage limiting device (7) comprises a drainage pipe (71), a connecting rod a (72), a connecting rod b (73), a floating ball (74), a limiting ring (75) and a rubber plug (78), wherein the drainage pipe (71) passes through the upper side wall of the barrel body (1), and the rubber plug (78) is arranged at one end of the drainage pipe (71) located inside the barrel body (1); the limiting ring (75) is arranged on the inner side of the upper end of the barrel body (1) and is arranged opposite to the drainage pipe (71); One end of the connecting rod a (72) is hinged to the drain pipe (71) via a pin (79), and the other end passes through a limit ring (75) from bottom to top and is connected to the float (74); one end of the connecting rod b (73) is connected to the rubber plug (78), and the other end is connected to the connecting rod a (72); when the water surface in the barrel (1) causes the float (74) to float up, the connecting rod a (72) pulls the rubber plug (78) through the connecting rod b (73), thereby opening the drain pipe (71); One end of the drain pipe (71) located inside the barrel (1) is a bell mouth, and the contracted end surface of the bell mouth is provided with an inner drain hole (77) having a diameter smaller than that of the drain pipe (71); the rubber plug (78) is butted against the inner drain hole (77) to achieve sealing of the drain pipe (71); a drain port (76) communicating with the interior of the barrel (1) is provided on the side wall of the bell mouth, and a silk screen is provided on the drain port (76); The noise-eliminating aquaculture seedling barrel further comprises a water flow buffer device (6) disposed in the barrel body (1) and below the shelf layer (5); The water flow buffer device (6) comprises a fixing ring (62) and a plurality of blades (61) arranged inside the fixing ring (62), wherein the fixing ring (62) is connected to the inner wall of the barrel (1), and both ends of each blade (61) are rotatably connected to the fixing ring (62) via a rotating shaft (64), and both ends of the blade (61) correspond to an angle fixer (63) installed on the fixing ring (62), and the angle fixer (63) is used to limit the rotation angle of the blade (61); The angle fixer (63) comprises a fixing block, a limiting groove is provided on the fixing block, and the fan blade (61) is a slat-shaped structure, and the end portion is accommodated in the limiting groove of the fixing block; The water flow buffer device (6) can control the size of the water flow entering the barrel (1) according to the needs of different fish eggs and fry, thereby controlling the rotation angle of the fan blade (61) to reduce the impact of excessively fast water flow on the fish eggs and fry.

2. The noise-eliminating aquaculture seedling barrel according to claim 1, characterized in that: The top and both side walls of the annular cavity of the barrel body (1) are provided with porous foam material plates (11); the bottom of the annular cavity is provided with a bubble curtain generating device (2), the bubble curtain generating device (2) is used to generate a bubble curtain, and the bubble curtain and the porous foam material plates (11) are used to isolate noise outside the barrel.

3. The noise-eliminating aquaculture seedling barrel according to claim 2, characterized in that: The bubble curtain generating device (2) comprises an annular aeration pipe and an air inlet pipe (21), wherein the annular aeration pipe is densely covered with tiny aeration holes, and the air inlet pipe (21) penetrates the side wall of the barrel (1) and is connected to the annular aeration pipe.

4. The noise-eliminating aquaculture seedling barrel according to claim 1, characterized in that: The top cover (3) is an upwardly protruding conical structure, and a porous foam material layer for sound insulation is provided on the inner side wall of the top cover (3); a light source (4) is provided on the inner side of the top cover (3), and a light source switch (41) for controlling the light source (4) is provided on the outer side of the top cover (3).

5. The noise-eliminating aquaculture seedling barrel according to claim 1, characterized in that: The shelf layer (5) comprises a shelf layer outer ring (51) and a hatching net (52) arranged on the shelf layer outer ring (51), wherein the shelf layer outer ring (51) is connected to the inner wall of the barrel body (1); The hatching net (52) is a segmented structure, comprising a plurality of hatching units arranged at intervals, each hatching unit comprising a mesh and side baffles (53) arranged on both sides of the mesh, the side baffles (53) preventing fertilized eggs on the mesh from falling off.

6. The noise-eliminating aquaculture seedling barrel according to claim 1, characterized in that: The barrel body (1) is arranged on a base (10), and the bottom of the barrel body (1) is a conical closing structure; The water inlet and sewage discharge system comprises a water inlet pipe (8) and a main sewage discharge pipe (9), wherein the main sewage discharge pipe (9) is arranged at the bottom of the conical closing structure, and a main sewage discharge pipe control valve (91) is provided on the main sewage discharge pipe (9); the water inlet pipe (8) is connected to the main sewage discharge pipe (9), and the water inlet pipe (8) is provided with a water inlet pipe control valve (81).

Images