A method and system for hatching freshwater fish sticky eggs

Abstract

The present invention discloses a method and system for hatching sticky eggs of freshwater fish, and relates to the technical field of hatching sticky eggs of freshwater fish. The method comprises the following steps: in a circular hatching pool, a plastic brush roller is used as a carrier for attaching the sticky eggs, and the sticky eggs are hatched under the stimulation of micro-flowing water. The plastic brush roller is provided with an impeller, and the flow rate of the micro-flowing water can drive the plastic brush roller to rotate through the impeller. The present invention uses a plastic brush as a carrier for attaching the sticky eggs, which can significantly improve the outbreak of water mold in the water body compared to using palm bark as a carrier. The plastic brush roller is installed on a bearing shaft on the inner wall of the hatching pool, and the water flow guide channel of the hatching pool is connected to the water flow through the water outlet component, water pump and water flow filtering equipment, so as to ensure that the sticky eggs are always hatched under the stimulation of the micro-flowing water. At the same time, the water flow can flow through each sticky egg, ensuring that the sticky eggs obtain sufficient dissolved oxygen, which is conducive to the hatching of the sticky eggs.

Description

Technical Field

[0001] The invention relates to the technical field of hatching freshwater fish sticky eggs, in particular to a hatching method and system for freshwater fish sticky eggs. Background Art

[0002] Sticky eggs belong to economically farmed fish, such as carp, crucian carp, bighead carp, and croaker, all of which produce sticky eggs. The outer layer of the egg membrane becomes sticky or has sticky threads when it comes into contact with water. After laying, it attaches to algae, reefs, shells and other attachment bases.

[0003] The current method for incubating sticky eggs of freshwater fish typically involves attaching the eggs to a carrier made of palm bark and then placing them in an incubation tank for still water or micro-flow. However, this method presents the following problems: Still water incubation fails to provide sufficient dissolved oxygen to the sticky eggs, reducing hatchability and potentially causing saprolegniasis or the proliferation of other pathogens. Furthermore, when attaching sticky eggs to palm bark, the densely packed palm bark causes the sticky eggs to clump together and die from lack of oxygen, making saprolegniasis more likely to break out. Therefore, we propose a method and system for incubating sticky eggs of freshwater fish. Summary of the Invention

[0004] The object of the present invention is to provide a method and system for hatching sticky eggs of freshwater fish to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for hatching sticky eggs of freshwater fish comprises the following steps: in an annular hatching pool, a plastic brush roller is used as a carrier for attaching the sticky eggs; the plastic brush roller with the sticky eggs attached is completely immersed in fresh water; the fresh water in the annular hatching pool is in a micro-flowing state, and the sticky eggs are hatched under the stimulation of the micro-flowing water; wherein the plastic brush roller is provided with an impeller; the flow rate of the micro-flowing water can drive the plastic brush roller to rotate through the impeller without causing damage to the sticky eggs.

[0007] A further improvement is that the flow rate of the micro-flow water is 0.3-0.6 m / s.

[0008] The present invention also provides a system for incubating sticky eggs of freshwater fish using the above-mentioned incubation method, comprising an annular incubation pool, the incubation pool being provided with a water flow guide channel, one end of the water flow guide channel being provided with a water outlet assembly, the other end of the water flow guide channel being connected to a circulation pipeline, and a plurality of sticky egg incubation assemblies being provided in an annular array on both the inner and outer walls of the water flow guide channel; wherein the sticky egg incubation assemblies include: a plastic brush roller for serving as a carrier for attaching the sticky eggs;

[0009] The bearing shaft is rotatably inserted into the outer wall of the hatching tank and is detachably connected to one end of the shaft of the plastic brush roller;

[0010] The impeller part is arranged at the other end of the shaft of the plastic brush roller and is driven by the flowing water in the water flow guide channel to drive the plastic brush roller to rotate so that the sticky eggs on the plastic brush roller come into contact with the flowing water.

[0011] A further improvement is that the end of the circulation pipeline away from the water flow guide channel is connected to the seedling pool, the seedling pool is connected to the water inlet end of the water flow filtration equipment through the outlet pipeline, the water outlet end of the water flow filtration equipment is connected to the water pump, and the water pump is connected to the water outlet component.

[0012] A further improvement is that the impeller portion includes a hollow seat connected to the shaft portion of the plastic brush roller, the outer circumferential wall of the hollow seat is connected to a plurality of groups of arc-shaped blades, the ends of the blades away from the hollow seat are provided with connected one-way air outlet heads, and the end of the bearing shaft away from the plastic brush roller is connected to the hollow seat;

[0013] The two adjacent groups of hollow seats on the outer wall of the hatching pool are connected to each other through an external pipe, and the two adjacent groups of hollow seats on the inner wall of the hatching pool are connected to each other through an internal pipe. A hollow seat close to the water outlet component is connected to the air supply component through a pipe, and the air supply component is arranged in a groove opened on the top of the hatching pool.

[0014] A further improvement is that the water outlet assembly includes: a circulation seat, which is arranged on the incubation tank, the circulation seat is connected to the water outlet head through a pipeline, the water outlet head is embedded in the inner wall of one end of the water flow guide channel, the water inlet end of the circulation seat is connected to the water outlet end of the water inlet seat, the water inlet end of the water inlet seat is connected to the water pump, and a hydraulic impeller group is provided in the water inlet seat, and the shaft of the hydraulic impeller group is drivingly connected to the air supply assembly;

[0015] The water quality agent storage shell is arranged above the circulation seat, and its discharge port extends into the circulation seat. An electromagnetic valve is provided in the discharge port. The electromagnetic valve is electrically connected to an external controller, and the external controller is electrically connected to a water quality detection sensor. The water quality detection sensor is embedded in the bottom wall of the water flow guide channel.

[0016] A further improvement is that the air supply component includes: an induced draft seat, which is arranged on the water inlet seat, and its inner cavity is provided with an induced draft impeller group, the shaft of the induced draft impeller group is connected to the shaft of the hydraulic impeller group, and the outer wall of the induced draft seat is provided with an air inlet and an air outlet, and the air outlet is connected to a hollow seat close to the water outlet component.

[0017] A further improvement is that the water outlet assembly further comprises: a movable plate, one end of which is inserted into the outer wall of the circulation seat and used to close the discharge port of the water-quality medicine storage shell, an elastic member is provided between the movable plate and the circulation seat, and a through port communicating with the discharge port is opened on the movable plate;

[0018] The air supply assembly also includes: an eccentric disk, which is sleeved on the shaft of the induced draft impeller group and located above the induced draft seat. The outer wall of the eccentric disk is in sliding contact with one end of the movable plate, and is used to drive the movable plate to move so that the feed port intermittently corresponds to the discharge port of the water quality agent storage shell.

[0019] A further improvement is that the end of the bearing shaft away from the hollow seat is connected to the connecting head, the connecting head is sleeved on the shaft of the plastic brush roller and is connected to the shaft, and a fixing piece is inserted into the connecting head for fixing the connecting head and the shaft of the plastic brush roller.

[0020] A further improvement is that one end of the bearing shaft extends into the hollow seat and is sleeved with a friction ring, a friction block is provided on the outside of the friction ring, the friction block is rotatably arranged on one end of the adjusting screw, and the other end of the adjusting screw is threaded through the hollow seat and connected to the handwheel.

[0021] A further improvement is that the blades are arc-shaped.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) The present invention uses a plastic brush as a carrier for sticky egg attachment, which can significantly reduce the outbreak of water mold disease in water bodies compared to using palm bark as a carrier;

[0024] 2) The present invention installs a plastic brush roller on a bearing shaft on the inner wall of the hatching tank, and allows water to flow into the water flow guide channel of the hatching tank through a water outlet assembly, a water pump, and a water flow filter. This ensures that the sticky eggs are always incubated in the micro-flow stimulation. At the same time, the water can flow through each sticky egg, ensuring that the sticky eggs receive sufficient dissolved oxygen, which is conducive to the hatching of the sticky eggs.

[0025] 3) The present invention further provides an impeller portion on the plastic brush roller. On the one hand, the flowing water can drive the plastic brush roller to rotate, ensuring that the sticky eggs on the plastic brush roller are in full contact with the flowing water, preventing the situation where some sticky eggs cannot fully contact the flowing water. On the other hand, the rotation of the impeller portion increases the contact area between the water flow and the air, increasing the dissolved oxygen in the water, and preventing the sticky eggs from dying due to lack of oxygen. This structure does not require the provision of additional power, can further reduce the occurrence of water mold disease in the water body, and improve the reproduction rate of freshwater fish.

[0026] 4) After the sticky eggs are hatched, the fry can enter the nursery pond downstream through the circulation pipeline, without the need for manual fishing and carrying, which reduces labor intensity and avoids damage to the fry, thereby facilitating successful artificial breeding. In addition, a water pump and a water flow filter are used to control the flow velocity of the water flowing in the water flow guide channel by adjusting the water pump, and the water flow filter is used to filter the flowing water entering the water flow guide channel to ensure the quality of the flowing water, improve the hatching rate of the sticky eggs, and prevent the growth of water mold in the water body;

[0027] 5) The present invention injects gas into each hollow seat through the air supply component, and the gas passes through the supporting shaft, the connecting head, the shaft of the plastic brush roller, the hollow seat and the blades and is ejected from the one-way air outlet head. On the one hand, the ejected gas can utilize the reaction force to assist the impeller part to rotate better. On the other hand, the ejected gas enters the flowing water in the water guide channel along with the blades, increases the dissolved oxygen content of the flowing water and forms a group of microbubbles, ensuring that the sticky eggs have sufficient dissolved oxygen, which is conducive to the hatching of the sticky eggs. At the same time, the air supply component and the air outlet component cooperate with each other. When the water quality detection sensor detects abnormal water quality, a quantitative agent can be added to the flowing water to improve the water quality and further prevent the growth of water mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the incubation system structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 Another perspective structural diagram;

[0030] Figure 3 This is a schematic structural diagram of the sticky egg hatching assembly of the present invention;

[0031] Figure 4 For the present invention Figure 3 Another perspective structural diagram;

[0032] Figure 5 This is a cross-sectional view of the structure of the sticky egg hatching assembly of the present invention;

[0033] Figure 6 It is a schematic structural diagram of the water outlet assembly and the air supply assembly of the present invention;

[0034] Figure 7 It is a schematic diagram of the partial structure of the water outlet component of the present invention;

[0035] Figure 8 It is a partial structural cross-sectional view of the air supply assembly of the present invention.

[0036] In the figure: 1. Hatching pool; 2. Water flow guide channel; 3. Circulation pipeline; 4. Seedling pool; 5. Water flow filtration equipment; 6. Water pump; 7. Groove; 8. Water outlet assembly; 81. Circulation seat; 82. Water outlet head; 83. Water quality agent storage shell; 84. Movable plate; 85. Elastic part; 86. Feed port; 87. Water inlet seat; 88. Hydraulic impeller assembly; 9. Sticky egg hatching assembly; 91. Plastic brush roller; 92. Load-bearing shaft; 93. Connector; 94. Hollow seat; 95. Blade; 96. One-way air outlet head; 97. Hollow seat; 98. Adjusting screw; 99. Friction block; 910. Friction ring; 10. Inner pipeline; 11. Outer pipeline; 12. Water quality detection sensor; 13. Air supply assembly; 131. Induced draft seat; 132. Induced draft impeller assembly; 133. Eccentric disk. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1

[0039] Please see the attached Figure 1-2 A hatching system for freshwater fish sticky eggs is provided, including a ring-shaped hatching pool 1, a water flow guide channel 2 in a circular arc shape is opened on the hatching pool 1, a water outlet component 8 is provided at one end of the water flow guide channel 2, and a circulation pipe 3 is connected to the other end of the water flow guide channel 2. The end of the circulation pipe 3 away from the water flow guide channel 2 is connected to the seedling pool 4, and the end of the circulation pipe 3 is specifically connected to the top of the seedling pool 4, so that the water flows downward into the seedling pool 4 to prevent the fry in the seedling pool 4 from entering the circulation pipe 3. The seedling pool 4 is connected to the water inlet end of the water flow filtration device 5 through the outlet pipe.

[0040] It should be noted that, the outlet pipe place can be provided with a spacer, to prevent the fish larvae in the nursery pond 4 from entering water flow filtering device 5, water flow filtering device 5 can adopt the conventional filtering equipment of this area, to ensure the flowing water quality of flowing in water guide channel 2, filtering the flowing water impurity can prevent that impurity covers the oolemma of sticky ovum and causes the fertilized egg to die of hypoxia all around, and effectively reduce the water body water mold and breed, the outlet end of water flow filtering device 5 is communicated with water pump 6, water pump 6 is communicated with water outlet assembly 8, this water pump 6 is an adjustable water pump (such as variable frequency centrifugal pump), by adjusting water pump 6, the flowing water velocity of flowing in the water guide channel 2 can be controlled, thereby a micro-flowing water environment is provided, when ensuring that water flows in annular hatching pond, avoid the excessively large sticky ovum oolemma that flow velocity causes to be injured problem, further, the flow velocity of micro-flowing water is preferably 0.3-0.6m / s;

[0041] The inner and outer walls of the water flow guide channel 2 are provided with a plurality of groups of sticky egg hatching components 9 in a circular array;

[0042] The sticky egg hatching assembly 9 includes:

[0043] The plastic brush roller 91, as a carrier for incubating sticky eggs, is more economical and efficient than conventional materials such as palm bark. Plastic is lightweight and readily available, not prone to rotting and scaling, and not prone to breeding harmful bacteria, and has a longer service life. Its use as a carrier for attaching sticky eggs can effectively prevent the occurrence of water mold disease.

[0044] The bearing shaft 92 is rotatably inserted into the outer wall of the hatching tank 1 and is detachably connected to one end of the shaft of the plastic brush roller 91. A bearing is provided at the connection between the bearing shaft 92 and the hatching tank 1.

[0045] The impeller part is arranged at the other end of the shaft of the plastic brush roller 91, and is driven by the flowing water in the water guide channel 2 to drive the plastic brush roller 91 to rotate, so that the sticky eggs on the plastic brush roller 91 are in contact with the flowing water in all directions. Through this arrangement, the sticky eggs on the plastic brush roller 91 can be grown evenly under the action of the flowing water, ensuring that the sticky eggs are always hatched in the stimulation of micro-flow water. At the same time, the water flow can flow through each sticky egg, ensuring that the sticky eggs obtain sufficient dissolved oxygen, which is conducive to the hatching of the sticky eggs. At the same time, the rotation of the impeller part increases the contact area between the water flow and the air, increases the dissolved oxygen in the water, and prevents the sticky eggs from dying due to lack of oxygen. After the sticky eggs are hatched, the fry can go downstream to the nursery pond 4, without the need for manual scooping and transportation, which reduces labor intensity and avoids damage to the fry, which is conducive to the success of artificial breeding. The material of the plastic brush roller 91 is preferably lightweight plastic, and its interior can be made into a hollow shape to further reduce its overall weight, thereby ensuring that the micro-flow water can drive its rotation through the impeller part.

[0046] Furthermore, the end of the load-bearing shaft 92 of this embodiment away from the hollow seat 97 is connected to the connecting head 93, and the connecting head 93 is sleeved on the shaft of the plastic brush roller 91 and connected to the shaft. A fixing piece is inserted into the connecting head 93 for fixing the connecting head 93 and the shaft of the plastic brush roller 91. The fixing piece is, for example, a bolt, which facilitates the disassembly and assembly of the plastic brush roller 91 and the load-bearing shaft 92.

[0047] The method for utilizing above-mentioned hatching system to hatch freshwater fish sticky eggs comprises the following steps:

[0048] S1: The water outlet assembly 8 injects water into the water flow guide channel 2 to attach the sticky eggs to the plastic brush roller 91, and then the plastic brush roller 91 is installed on the bearing shaft 92;

[0049] S2: The flowing water flows from one end of the water flow guide channel 2 to the other end and is discharged from the circulation pipe 3. During the flowing water, the impeller part is driven, and the impeller part drives the plastic brush roller 91 to rotate, so that the sticky eggs attached to the plastic brush roller 91 are in full contact with the flowing water and hatch in the flowing water environment;

[0050] S3: The fry hatched from the sticky eggs are discharged from the flow pipe 3 along the flow water.

[0051] Example 2

[0052] Please see the attached Figure 3-5On the basis of Example 1, the impeller portion of this embodiment includes a hollow seat 94 connected to the shaft of the plastic brush roller 91. The vertical section of the hollow seat 94 is cylindrical. The outer wall of the circumference of the hollow seat 94 is connected to a plurality of groups of blades 95. The blades 95 are arc-shaped. The end of the blades 95 away from the hollow seat 94 is provided with a connected one-way air outlet head 96. The one-way air outlet head 96 is a nozzle with a one-way valve inside, so that water is not easy to enter. The end of the bearing shaft 92 away from the plastic brush roller 91 is connected to the hollow seat 97.

[0053] Two adjacent groups of hollow seats 97 on the outer wall of the hatching tank 1 are connected to each other through an outer pipe 11, and two adjacent groups of hollow seats 97 on the inner wall of the hatching tank 1 are connected to each other through an inner pipe 10. A hollow seat 97 near the water outlet assembly 8 is connected to the air supply assembly 13 through a pipe. The air supply assembly 13 is arranged in the groove 7 opened at the top of the hatching tank 1;

[0054] Gas is injected into each hollow seat 97 through the air supply component 13, and the gas passes through the supporting shaft 92, the connecting head 93, the shaft of the plastic brush roller 91, the hollow seat 94 and the blades 95 and is ejected from the one-way gas outlet head 96. On the one hand, the ejected gas can assist the impeller part to rotate better by utilizing the reaction force. On the other hand, the ejected gas enters the flowing water in the water guide channel 2 along with the blades 95, increasing the dissolved oxygen content of the flowing water and forming a group of microbubbles, ensuring that the sticky eggs have sufficient dissolved oxygen, which is beneficial to the hatching of the sticky eggs. In addition, the turbulent effect generated by the gas injection can destroy the water boundary layer, which plays a certain role in preventing pollutants from being deposited on the surface of the blades 95.

[0055] Furthermore, one end of the load-bearing shaft 92 of this embodiment extends into the hollow seat 97 and is sleeved with a friction ring 910. A friction block 99 is provided on the outside of the friction ring 910. The friction ring 910 and the friction block 99 can be made of wear-resistant rubber material. The friction block 99 is rotatably arranged at one end of the adjusting screw 98. The other end of the adjusting screw 98 is threaded through the hollow seat 97 and connected to the handwheel. By rotating the handwheel, the friction block 99 is driven to move through the adjusting screw 98. By adjusting the contact between the friction block 99 and the friction ring 910, the rotation speed of the plastic brush roller 91 can be adjusted to prevent the plastic brush roller 91 from rotating too fast, ensuring that the plastic brush roller 91 runs stably within the optimal speed range.

[0056] Example 3

[0057] Please see the attached Figure 6-8 Based on Example 2, the water outlet assembly 8 of this embodiment includes:

[0058] The circulation seat 81 is provided on the incubation pool 1. The circulation seat 81 is connected to the water outlet head 82 (a nozzle or water outlet device for supplying flowing water, etc.) through a pipeline. The water outlet head 82 is used to make the flowing water flow from one end of the water flow guide channel 2 to the other end of the water flow guide channel 2. The water outlet head 82 is embedded in the inner wall of one end of the water flow guide channel 2. The water inlet end of the circulation seat 81 is connected to the water outlet end of the water inlet seat 87. The water inlet seat 87 is provided in the groove 7. The water inlet end of the water inlet seat 87 is connected to the water pump 6. A hydraulic impeller group 88 is provided in the water inlet seat 87. The shaft of the hydraulic impeller group 88 is transmission-connected with the air supply component 13. The water supplied by the water pump 6 enters the water inlet seat 87, and then enters the circulation seat 81 from the water inlet seat 87, and then flows out through the water outlet head 82. When the water flows in the water inlet seat 87, it drives the hydraulic impeller group 88 to rotate, and the hydraulic impeller group 88 drives the air supply component 13 to work;

[0059] The water quality agent storage shell 83 is provided above the circulation seat 81. The water quality agent storage shell 83 stores water quality regulating agents, such as iodine preparations, thioether floxacin, methylene blue, quicklime or formaldehyde solution (formalin), etc. Its discharge port extends into the circulation seat 81. A solenoid valve (not shown in the figure) is provided in the discharge port. The solenoid valve is electrically connected to an external controller, and the external controller is electrically connected to a water quality detection sensor 12. The water quality detection sensor 12 is embedded in the bottom wall of the water flow guide channel 2. The water quality detection sensor 12 detects water quality data and sends it to the outside. The controller controls the solenoid valve to open when the detected water quality data exceeds the preset threshold. At this time, the agent in the water quality agent storage shell 83 enters the circulation seat 81 from the discharge port and contacts and mixes with the flowing water entering the circulation seat 81, and then flows in the water flow guide channel 2, effectively preventing the growth of water mold in the water body. The water quality data detected by the water quality detection sensor 12 restores the preset threshold, so that the external controller controls the solenoid valve to close. The above-mentioned water quality detection sensor 12 can adopt a multi-parameter water quality sensor, which is a conventional equipment in this field and will not be described in detail here.

[0060] Furthermore, the air supply assembly 13 of this embodiment includes:

[0061] The induced draft seat 131 is arranged on the water inlet seat 87, and its inner cavity is provided with an induced draft impeller group 132. The shaft of the induced draft impeller group 132 is connected to the shaft of the hydraulic impeller group 88. The induced draft impeller group 132 includes a fan blade shaft and induced draft fan blades arranged on the outer wall of the fan blade shaft. The outer wall of the induced draft seat 131 is provided with an air inlet and an air outlet. The air outlet is connected to a hollow seat 97 close to the water outlet component 8. A filter is arranged in the air inlet. When the hydraulic impeller group 88 rotates, the induced draft impeller group 132 is driven to rotate, so that the external gas enters the air inlet, is filtered through the filter, and is discharged from the air outlet through the pipeline to each hollow seat 97.

[0062] Furthermore, the water outlet assembly 8 of this embodiment further includes:

[0063] A movable plate 84 is inserted at one end into the outer wall of the circulation seat 81 to seal the discharge port of the aqueous drug storage housing 83. An elastic member 85 (e.g., a spring) is provided between the movable plate 84 and the circulation seat 81. A through port 86 is provided on the movable plate 84 to communicate with the discharge port.

[0064] Furthermore, the air supply assembly 13 further includes:

[0065] The eccentric disk 133 is sleeved on the shaft of the induced draft impeller assembly 132 and is located above the induced draft seat 131. The outer circumferential wall of the eccentric disk 133 slides against one end of the movable plate 84. A ball can be embedded in one end of the movable plate 84 to contact the outer circumferential wall of the eccentric disk 133, which is used to drive the movable plate 84 to move so that the feed port 86 intermittently corresponds to the discharge port of the water-quality pharmaceutical storage shell 83.

[0066] When the induced draft impeller group 132 rotates, it also drives the eccentric disk 133 to rotate. The eccentric disk 133 intermittently pushes the movable plate 84 to move back and forth, and then the material port 86 intermittently corresponds to the discharge port of the water quality agent storage shell 83. If the solenoid valve is opened, the medicine in the water quality agent storage shell 83 enters the circulation seat 81 in a quantitative manner and is mixed with the flowing water entering the circulation seat 81 and input into the water flow guide channel 2. If the solenoid valve is closed, the medicine in the water quality agent storage shell 83 does not enter the circulation seat 81.

[0067] To validate the hatching effectiveness of this system, sticky eggs of Culter alba and Crucian carp were incubated at the Anhui Wanjiang Fisheries Technology Research Institute Co., Ltd. The water temperature was maintained at 24-26°C during incubation, and samples were randomly collected from the hatching tanks on the second day of incubation. When infected with Saprolegnia, white or off-white mycelium appears on the surface of the eggs. Microscopic observation allows direct observation of the presence of Saprolegnia hyphae or spores on or within the eggs. The number of infected eggs was counted, and the incidence rate was calculated.

[0068] Incidence (%) = (number of infected eggs / total number of eggs) × 100

[0069] Two control groups were also set up: 1) Locking the friction ring 910 with a friction block 99 kept the plastic brush roller 91 stationary; and 2) Using a palm bark carrier instead of the plastic brush roller 91 for incubation. The results showed that, using this system for sticky egg incubation without the addition of any chemicals, the saprolegniasis hatching rate in the plastic brush roller system rotating with the flowing water was approximately 15%, while the incidence of saprolegniasis in the static brush roller system was approximately 18%, and the incidence in the palm bark carrier incubation system was 28%. This demonstrates that the choice of plastic carrier significantly inhibits the growth of saprolegniasis during the sticky egg incubation process, and that the plastic brush roller system rotating with the flowing water also has a certain positive effect in controlling saprolegniasis.

[0070] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hatching system for freshwater fish sticky eggs, characterized in that: The invention comprises an annular hatching pool (1), wherein a water flow guide channel (2) is provided on the hatching pool (1), and the invention is characterized in that: a water outlet component (8) is provided at one end of the water flow guide channel (2), the other end of the water flow guide channel (2) is connected to a flow pipe (3), and a plurality of groups of sticky egg hatching components (9) are provided in an annular array on the inner and outer side walls of the water flow guide channel (2); wherein, The sticky egg hatching assembly (9) comprises: a plastic brush roller (91) used as an attachment carrier for the sticky eggs; a bearing shaft (92) rotatably inserted into the outer wall of the hatching pool (1) and detachably connected to one end of the shaft of the plastic brush roller (91); an impeller portion provided at the other end of the shaft of the plastic brush roller (91) and driven by the flowing water in the water flow guide channel (2) to rotate the plastic brush roller (91) so that the sticky eggs on the plastic brush roller (91) come into contact with the flowing water; One end of the circulation pipeline (3) away from the water flow guide channel (2) is connected to the seedling raising pool (4), the seedling raising pool (4) is connected to the water inlet end of the water flow filtering device (5) through the outlet pipeline, the water outlet end of the water flow filtering device (5) is connected to the water pump (6), and the water pump (6) is connected to the water outlet component (8); The impeller portion includes a hollow seat (94) connected to the shaft of the plastic brush roller (91); the outer circumferential wall of the hollow seat (94) is connected to a plurality of groups of arc-shaped blades (95); the end of the blade (95) away from the hollow seat (94) is provided with a connected one-way air outlet (96); the end of the bearing shaft (92) away from the plastic brush roller (91) is connected to a hollow seat (97); two adjacent groups of hollow seats (97) on the outer wall of the hatching tank (1) are connected to each other through an outer pipeline (11); two adjacent groups of hollow seats (97) on the inner wall of the hatching tank (1) are connected to each other through an inner pipeline (10); a hollow seat (97) close to the water outlet assembly (8) is connected to the air supply assembly (13) through a pipeline; The water outlet assembly (8) comprises: a circulation seat (81) provided on the hatching pool (1); the circulation seat (81) is connected to a water outlet head (82) through a pipeline; the water outlet head (82) is embedded in the inner wall of one end of the water flow guide channel (2); the water inlet end of the circulation seat (81) is connected to the water outlet end of the water inlet seat (87); the water inlet end of the water inlet seat (87) is connected to the water pump (6); a hydraulic impeller group (88) is provided in the water inlet seat (87); the shaft of the hydraulic impeller group (88) is transmission-connected to the air supply assembly (13); a water quality agent storage shell (83) is provided above the circulation seat (81); the discharge port thereof extends into the circulation seat (81); The air supply assembly (13) comprises: an air induction seat (131) provided on the water inlet seat (87), an inner cavity of which is provided with an air induction impeller assembly (132), the shaft of the air induction impeller assembly (132) being connected to the shaft of the hydraulic impeller assembly (88), an outer wall of the air induction seat (131) being provided with an air inlet and an air outlet, the air outlet being communicated with a hollow seat (97) close to the water outlet assembly (8); The water outlet assembly (8) further includes: a movable plate (84), one end of which is inserted into the outer wall of the circulation seat (81) for closing the discharge port of the water quality agent storage shell (83); an elastic member (85) is provided between the movable plate (84) and the circulation seat (81); and a through-hole (86) communicating with the discharge port is provided on the movable plate (84); the air supply assembly (13) further includes: an eccentric disk (133), which is sleeved on the shaft of the induced draft impeller assembly (132) and is located above the induced draft seat (131); the circumferential outer wall of the eccentric disk (133) is in sliding contact with one end of the movable plate (84) for driving the movable plate (84) to move so that the through-hole (86) intermittently corresponds to the discharge port of the water quality agent storage shell (83).

2. The hatching system for freshwater fish sticky eggs according to claim 1, wherein: The air supply assembly (13) is arranged in a groove (7) opened on the top of the hatching tank (1).

3. The hatching system for freshwater fish sticky eggs according to claim 1, wherein: A solenoid valve is provided in the discharge port of the water quality agent storage shell (83), the solenoid valve is electrically connected to an external controller, the external controller is electrically connected to a water quality detection sensor (12), and the water quality detection sensor (12) is embedded in the bottom wall of the water flow guide channel (2).

4. The hatching system for freshwater fish sticky eggs according to claim 1, wherein: One end of the bearing shaft (92) away from the hollow seat (97) is connected to the connecting head (93), and the connecting head (93) is sleeved on the shaft of the plastic brush roller (91) and is connected to the shaft. A fixing piece is inserted into the connecting head (93) for fixing the connecting head (93) and the shaft of the plastic brush roller (91).

5. The hatching system for freshwater fish sticky eggs according to claim 4, wherein: One end of the bearing shaft (92) extends into the hollow seat (97) and is sleeved with a friction ring (910). A friction block (99) is provided on the outside of the friction ring (910). The friction block (99) is rotatably arranged on one end of the adjusting screw (98). The other end of the adjusting screw (98) is threadedly passed through the hollow seat (97) and connected to the hand wheel.

6. A method for hatching freshwater fish sticky eggs, using the hatching system for freshwater fish sticky eggs according to claim 1, characterized in that: In an annular hatching pool (1), a plastic brush roller (91) is used as a carrier for sticky eggs to attach. The plastic brush roller (91) with the sticky eggs attached is completely immersed in fresh water. The fresh water in the annular hatching pool (1) is in a micro-flowing state, and the sticky eggs are hatched under the stimulation of the micro-flowing water. The plastic brush roller (91) is provided with an impeller, and the micro-flowing water can drive the plastic brush roller (91) to rotate through the impeller.

7. A method for hatching freshwater fish sticky eggs according to claim 6, characterized in that, The flow rate of the micro-flow water is 0.3-0.6 m / s.

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