Automatic fertilization and hatching device for fish eggs

Abstract

The present invention discloses an automatic fertilization and hatching device for fish eggs, which relates to fish egg hatching technology. The device comprises a hatching tray, a uniform shaking bed, a shower bed, and an incubator. The uniform shaking bed comprises a liquid holding table, a blower, and an oscillating carrier. The liquid holding table is provided with a rectangular water tank for placing the hatching trays. The blower is mounted on one side of the liquid holding table and has an air outlet extending above the rectangular water tank. The oscillating carrier is mounted below the liquid holding table and has a supporting surface for lifting and vibrating the hatching trays in the rectangular water tank and transporting them to the shower bed. A transfer carrier is mounted between the shower bed and the incubator for transporting the hatching trays from the shower bed to the incubator. The device improves the uniformity of the dispersed sperm-egg mixture, facilitating the fertilization of fish eggs. Furthermore, the device is highly automated and industrialized, effectively reducing the occurrence of viral damage, and is suitable for various fish breeding farms.

Description

Technical Field

[0001] The present invention relates to fish egg hatching technology, and more particularly to a fish egg automatic fertilization and hatching device. Background Art

[0002] my country is a major aquaculture producer in the world, boasting world-leading aquaculture technology and annual production exceeding 50 million tons, ranking first globally. my country boasts a diverse array of aquaculture species, providing delicious food and high-quality protein to meet people's ever-growing needs for a better life. The tremendous progress in my country's aquaculture industry is due to the development of the feed and seed industries. Breakthroughs in artificial seed propagation technology, in particular, have made large-scale farming of many wild fish possible. Hatching fertilized eggs is a crucial step in seed propagation, crucial to fry productivity and quality, and significantly impacting subsequent aquaculture.

[0003] Currently, there are two methods for artificially breeding fish eggs: non-sticky eggs are fertilized and hatched in an incubation tank or incubation loop; sticky eggs are attached to fish nests (such as palm leaves or mesh) placed in a pond and fertilized and hatched or incubated by pouring water. Although this method of completing fertilization and hatching at the hatching site can effectively save intermediate transportation links, it causes the eggs to be piled together during the fertilization process, resulting in a low fertilization rate. If the eggs are turned over at the hatching site, on the one hand, they are easily damaged, and on the other hand, they are easily scattered in the water, which also leads to a low fertilization rate. Moreover, the hatching site fertilization method has high requirements for water quality. If it is not handled properly, it often leads to the problem of water mold infection of the eggs / fertilized eggs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic fertilization and hatching device for fish eggs in view of the deficiencies in the prior art, thereby improving the fertilization rate of fish eggs and reducing the infection of fish eggs / fertilized eggs.

[0005] The automatic fertilization and hatching device for fish eggs described in the present invention comprises a hatching tray, a uniform shaking bed, a shower bed and an incubator; the uniform shaking bed comprises a liquid holding table, a blower and an oscillating conveyor; the liquid holding table is provided with a rectangular water tank for placing the hatching tray, the blower is installed on one side of the liquid holding table, and the blower is provided with an air outlet end extending above the rectangular water tank; the oscillating conveyor is installed below the liquid holding table, and the oscillating conveyor is provided with a supporting surface that can lift and vibrate the hatching tray in the rectangular water tank and can transport the hatching tray to the shower bed; a transfer conveyor for transporting the hatching tray in the shower bed to the incubator is installed between the shower bed and the incubator.

[0006] The oscillating carrier includes a base rod, a connecting rod 1, a connecting rod 2, a synchronization rod, a carrying rod, a retarding motor 2 and a control unit 2; the base rod and the retarding motor 2 are both fixedly mounted below the liquid holding table 1, the connecting rod 1 is fixedly mounted on the output shaft of the retarding motor 2, and the connecting rod 2 is rotatably mounted on an end of the base rod away from the connecting rod 1; a synchronization rod is rotatably mounted between the connecting rod 1 and the connecting rod 2, and the ends of the connecting rod 1 and the connecting rod 2 away from the base rod are both rotatably mounted with a carrying rod for supporting the hatching tray; the control unit 2 is electrically connected to the retarding motor 2.

[0007] The supporting surface formed by the two supporting rods and the synchronous rod and the base rod are parallel to each other.

[0008] The control unit 2 includes an access terminal 1, an access terminal 2, a control switch, a second relay, a third relay, a rectifier bridge 2, and a variable inductor; the common contact of the second relay is electrically connected to the access terminal 1, the normally closed contact of the second relay is electrically connected to one end of the retarder motor 2 and one end of the control switch, the other end of the control switch is electrically connected to an input end of the rectifier bridge 2, the coils of the second relay and the third relay are connected in parallel between the two output ends of the rectifier bridge 2, and the other input end of the rectifier bridge 2 is electrically connected to the access terminal 2 through the variable inductor; the other end of the retarder motor 2 is electrically connected to the end of the variable inductor away from the rectifier bridge 2 through the normally closed contact of the third relay.

[0009] The second control unit further includes a fuse and an X capacitor; the common contact of the second relay is electrically connected to the first access terminal through the fuse, one end of the X capacitor is electrically connected to the common contact of the second relay, and the other end of the X capacitor is electrically connected to the second access terminal.

[0010] The structure of the transfer consignor is consistent with that of the oscillating consignor, and the control switch in the transfer consignor is always in the off state.

[0011] The shower bed includes a liquid holding table 2 and a shower; the shower includes a water tank, a submersible pump 1, a water outlet pipe, a vertical column and a spray pipe net plate; the liquid holding table 2 is installed on one side of the liquid holding table 1, the vertical column is fixedly installed at an end corner of the liquid holding table 2 away from the liquid holding table 1, and the spray pipe net plate is installed at the end of the vertical column; the water tank is arranged on the periphery of the liquid holding table 2, the submersible pump 1 is installed in the water tank, and the submersible pump 1 is connected to the spray pipe net plate through the water outlet pipe.

[0012] The second liquid holding table is provided with a water return pipe connected with the water tank.

[0013] The spray pipe net plate is composed of a rectangular frame and winding small tubes installed in the rectangular frame; a plurality of micro holes arranged at equal intervals are opened below the small tubes.

[0014] The hatching tray comprises a frame and a mesh; the mesh is fixed in the frame, and handle bars are fixed on both sides of the frame, and both ends of the handle bars extend to the periphery of the frame.

[0015] Beneficial effects

[0016] The advantages of the present invention are:

[0017] 1. The use of a shaker, shower bed, and incubator allows fertilization and hatching to occur in separate processes within the integrated equipment. The shaker, with its air blower and oscillating conveyor, evenly disperses the sperm-egg mixture, improving its uniformity and facilitating fertilization. The oscillating conveyor also automatically transports the hatching trays to the shower bed for cleaning, activation, and fertilization of the sperm and eggs. This highly automated and factory-scale system reduces both manpower and material resources, effectively minimizing the risk of viral infections and making it suitable for a variety of fish breeding farms.

[0018] 2. The multi-link oscillating transporter, consisting of a base rod, connecting rod 1, connecting rod 2, synchronization rod, stretching rod, retarder motor 2, and control unit 2, achieves both uniform vibration and transport of the incubator trays. While ensuring the functionality of the device, the number of mechanical components is reduced, optimizing the device structure and improving its reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the automatic fertilization and hatching device of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the hatching tray of the present invention;

[0021] Figure 3 Schematic diagram of the installation structure of the hair dryer of the present invention;

[0022] Figure 4 Schematic diagram of the installation structure of the mover of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the oscillating carrier of the present invention;

[0024] Figure 6 This is a schematic diagram of the second circuit connection of the control unit of the present invention;

[0025] Figure 7 This is a schematic diagram of the installation structure of the shower bed of the present invention.

[0026] Among them: 1-incubation tray, 2-shaking table, 3-shower bed, 4-incubator, 5-transfer consignor, 11-frame, 12-mesh, 13-handle bar, 20-liquid table 1, 21-blower, 22-oscillating consignor, 23-rectangular water tank, 211-parallel part, 212-mover, 213-external air pump, 214-spring hose, 215-blowing comb, 216-baffle, 217-motor control device, 2121-slow motor 1. 2122-Mounting seat, 2123-Side wheel 2, 2124-Side wheel 1, 2125-Roller, 2151-Cross bar tube, 2152-Branch pipe, 221-Retarder motor 2, 222-Base rod, 223-Connecting rod 1, 224-Connecting rod 2, 225-Synchronizing rod, 226-Stretching rod, 31-Liquid holding table 2, 32-Water tank, 33-Submersible pump 1, 34-Vertical column, 35-Water outlet pipe, 36-Spray pipe mesh plate, 37-Return pipe. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the embodiments, but this does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0028] See Figure 1-Figure 7 The present invention provides an automatic fertilization and hatching device for fish eggs, comprising a hatching tray 1, a shaking table 2, a shower bed 3 and an incubator 4.

[0029] like Figure 2 As shown, the hatching tray 1 has a rectangular structure. The hatching tray 1 includes a frame 11 and a mesh 12. The mesh 12 is woven from fine threads spun from plant fibers. The diameter of the fine threads is required to be about 1 mm, and the minimum side length of the mesh is about 1 mm (the diameter of the fish eggs is generally greater than 1.5 mm). The frame 11 is composed of a frame and a base, and the two are integrated. The base is a grid composed of a plurality of small bars perpendicular to each other. The grid diameter is about 5-15 cm and the side height is about 1 cm. The mesh 12 is covered on the base and compacted and fixed with long bars on all sides to ensure that the mesh 12 is in a flattened state. Handle bars 13 are provided on each opposite side of the hatching tray 1.

[0030] The shaker 2 is used to load the hatching tray 1 and shake the sperm-egg mixture in the hatching tray 1 so that it is evenly distributed in the hatching tray 1. Figure 3 As shown, the homogenizing table 2 includes a liquid holding table 20, a blower 21 and an oscillating carrier 22.

[0031] Liquid holding table 1 (20) resembles a flat table, with a rectangular water tank (23) on its surface for holding liquid. This liquid is typically 0.7%-0.9% saline solution. The length and width of rectangular water tank 23 are both larger than those of incubation tray 1. A pre-prepared sperm-egg mixture (i.e., fish sperm and unfertilized fish eggs) is poured into incubation tray 1 and arranged at an average density of 25 eggs per square centimeter. Then, the blower (21) and oscillating conveyor (22) are activated. The blower (21) repeatedly moves and blows air over incubation tray 1, dispersing the accumulated sperm-egg mixture. Combined with the oscillating conveyor (22), the incubation tray 1 is vibrated, further dispersing the sperm-egg mixture and improving its uniformity, maintaining a uniform distance between the eggs. Once the sperm-egg mixture is fully dispersed, it is immersed in the saline solution on liquid holding table 1 (20).

[0032] The blower 21 can be any blower currently available on the market. However, considering that existing blowers mainly use a single air outlet to blow the sperm-egg mixture, their blowing efficiency is low, and the fish eggs are unevenly distributed after blowing, this embodiment adopts a blower 21 with the following structure.

[0033] like Figure 4 As shown, the blower 21 is mounted on one side of the liquid table 20 and comprises an L-shaped bracket. One end of the bracket is fixedly mounted on the outside of the liquid table 20. Baffles 216 are fixed to both ends of a parallel portion 211 of the bracket, which is parallel to the surface of the liquid table 20. Baffles 216 are located on the side of the parallel portion 211 away from the liquid table 20.

[0034] The parallel portion 211 is provided with a mover 212. The mover 212 includes a roller 2125, a side wheel 1 2124 and a side wheel 2 2123. The roller 2125 is located on the parallel portion 211 and is in contact with and connected to the parallel portion 211. The side wheel 1 2124 and the side wheel 2 2123 are respectively located on both sides of the parallel portion 211. Both sides of the parallel portion 211 are provided with positioning grooves 2126 that match the side wheel 1 2124 and the side wheel 2 2123 in a one-to-one manner. The side wheel 1 2124 and the side wheel 2 2123 are placed in the two positioning grooves 2126 in a one-to-one manner, and the rolling surface of the side wheel contacts the bottom surface of the positioning groove 2126. The upper and lower end faces of the side wheel contact and are connected in a one-to-one manner with the two opposite side walls of the positioning groove 2126, thereby realizing the positioning of the side wheels, so that when the mover 212 moves along the parallel portion 211, the mover 212 as a whole will not tilt.

[0035] A retarder motor 1 2121 is located above side wheel 2123. The output end of retarder motor 1 2121 is fixedly connected to side wheel 2123 via a connecting shaft, enabling the entire mover 212 to move along parallel portion 211. A mounting base 2122 is provided on the outer side of the connecting shaft, rotatably connected thereto. Retarder motor 1 2121 is fixedly mounted on mounting base 2122. A shaft extending through roller 2125 is provided on one side of mounting base 2122, rotatably connected to roller 2125. A connecting rod is provided in side wheel 1 2124, rotatably connected thereto. The end of the connecting rod is welded to the shaft.

[0036] A blow comb 215 is provided at the end of the shaft away from the mounting base 2122. Specifically, the blow comb 215 consists of a crossbar 2151 and several branch tubes 2152 mounted below the crossbar 2151. The branch tubes 2152 are spaced 1 mm apart, have an outer diameter of 2 mm, and an inner diameter of 1 mm. The openings of the branch tubes 2152 are 11 cm away from the incubation tray. The branch tubes 2152 are connected to the crossbar 2151, which is in turn connected to the external air pump 213 via a spring hose 214.

[0037] A motor control device 217 is mounted on the sidewalls of the mounting base 2122. The motor control device 217 includes a motor controller and contact switches mounted on either side of the motor controller. The contact switches are electrically connected to the input control terminals of the motor controller. The two contact switches are positioned to match the position of the baffle 216, meaning that the baffle 216 blocks the contact switches.

[0038] When the retarder motor 1 2121 starts and drives the entirety of the mover 212 to move toward one end of the parallel portion 211, if the contact switch contacts the baffle 216, then the contact switch sends a signal to the motor controller. The motor controller controls after receiving the signal, and the retarder motor 1 2121 is reversed to move the mover 212 toward the other end of the parallel portion 211. When the other contact switch contacts the other baffle 216, the rotation of the retarder motor 1 2121 is reversed relative to the last time. In this way, the forward / reverse rotation of the retarder motor 1 2121 can be realized, and the mover 212 can be moved back and forth between the two baffles 216 of the parallel portion 211. The movement of the mover 212 drives the combing 215 to move synchronously. The gas blown out by the combing 215 makes the fish eggs in the dense mesh dish reach the effect of dispersion.

[0039] like Figure 5As shown, the oscillating carrier 22 includes a base rod 222, a connecting rod 1 223, a connecting rod 224, a synchronization rod 225, a supporting rod 226, a second retarder motor 221, and a second control unit. The base rod 222 and the second retarder motor 221 are both fixedly mounted below the first liquid storage table 20. The first connecting rod 223 is fixedly mounted on the output shaft of the second retarder motor 221, with the intersection of the extension of the first connecting rod 223 and the base rod 222 located at the axis of the second retarder motor 221. The second connecting rod 224 is rotatably mounted on the end of the base rod 222 away from the first connecting rod 223. A synchronization rod 225 is rotatably mounted between the first connecting rod 223 and the second connecting rod 224. A supporting rod 226 for supporting the incubation tray 1 is rotatably mounted on the ends of the first connecting rod 223 and the second connecting rod 224 away from the base rod 222. Specifically, the handle bar 13 of the incubation tray 1 is placed on the supporting rod 226, thereby supporting the incubation tray 1. The hatching tray 1 , the synchronization rod 225 and the base rod 222 are arranged in parallel.

[0040] When the retarder motor 221 drives the connecting rod 1 223 to rotate, the synchronizing rod 225 positions the two connecting rods, so that the connecting rod 224 rotates synchronously with the connecting rod 1 223, thereby realizing the lifting and movement of the hatching tray 1. During the movement, the hatching tray 1, the synchronizing rod 225 and the base rod 222 are always in a parallel state, thereby ensuring that the hatching tray 1 is always balanced during the transfer process and does not tilt.

[0041] The vibration function of the oscillating carrier 22 is realized by the control unit 2. Figure 6 As shown, the control unit 2 of the present invention includes access terminal 1, access terminal 2, fuse F1, X-capacitor C1, control switch S1, starting capacitor C2, second relay K2, third relay K3, rectifier bridge 2 D2, and variable inductor L1. One end of fuse F1 is electrically connected to access terminal 1, while the other end of fuse F1 is electrically connected to one end of X-capacitor C1 and the common contact of second relay K2. The normally closed contact of second relay K2 is electrically connected to one end of retarder motor 221 and one end of control switch S1. The other end of X-capacitor C1 is electrically connected to access terminal 2. The other end of control switch S1 is electrically connected to one input end of rectifier bridge 2 D2. The coils of second relay K2 and third relay K3 are connected in parallel between the two output ends of rectifier bridge 2 D2. The other input end of rectifier bridge 2 is electrically connected to access terminal 2 via variable inductor L1. The other end of the retarder motor 221 is electrically connected to the end of the variable inductor L1 away from the rectifier bridge 2 D2 via the normally closed contact of the third relay K3. The starting capacitor C2 is connected to both ends of the retarder motor 221.

[0042] After the input current is input to the access terminal, the retarder motor 221 starts to start, and the control switch S1 is closed. The electrical signal is input into the variable inductor L1 through the rectifier bridge 2 D2. Because the variable inductor L1 has a hysteresis effect on the current, the coils of the second relay K2 and the third relay K3 at this time have no current flowing through them or the current flowing through them does not meet the conditions for triggering the relay coils to operate, so the two relays remain in an inoperative state. When the current released by the variable inductor L1 reaches the triggering condition of the relay, the second relay K2 and the third relay K3 act simultaneously to disconnect the circuit of the retarder motor 221, causing the retarder motor 221 to stop working. Since the retarder motor 221 drives the hatching tray 1 to move away from the support after starting, and the lag time of the variable inductor L1 on the current is relatively short, belonging to the millisecond level, the lifting height of the hatching tray 1 is relatively small. When retarder motor 221 loses power, the weight of incubation tray 1 causes its output shaft to rotate back to its initial position, thereby resetting incubation tray 1. During this process, variable inductor L1 releases its stored energy. The action of second and third relays K2 and K3 causes their circuits to disconnect, causing their normally closed contacts to reclose, reopening the circuit. The electronic components within the circuit then repeat the aforementioned process, lifting and resetting incubation tray 1. This repetitive process achieves the desired vibration effect on incubation tray 1.

[0043] The vibration amplitude of the incubation tray 1 can be adjusted by adjusting the inductance of the variable inductor L1, thereby adjusting the lag time of the inductor current, thereby adjusting the vibration amplitude of the incubation tray 1. The relationship between inductance and lag time of the inductor current is common knowledge in electronics technology and will not be discussed further in this article.

[0044] Furthermore, when the second retarder motor 221 is needed to drive the hatching tray 1 to be transferred to the shower bed 3, the control switch S1 can be disconnected, and power to the second rectifier bridge D2, the second relay K2, and the third relay K3 can be cut off. At this point, the live and neutral wires can be connected to the two input terminals. When the second retarder motor 221 needs to be reversed to reset the rods connected to it, the live and neutral wires on the two input terminals can be swapped.

[0045] It should be noted that during the process of the retarder motor 221 transporting the hatching tray 1 and resetting it, the control of the working state of the retarder motor 221 can be achieved through an air switch. As for the problem of swapping the zero and live wires, a phase converter can be used. The above implementation methods are all conventional technical means in electrical technology. Those skilled in the art can easily achieve the control of the working state of the retarder motor 221 and the swap of the zero and live wires based on the above description and common knowledge, so this article will not discuss it further.

[0046] like Figure 7 As shown, the shower bed 3 includes a liquid storage table 2 31 and a shower. The structure of the liquid storage table 2 31 is consistent with that of the liquid storage table 1 20, but the liquid storage table 2 31 contains clean water. The shower includes a water tank 32, a submersible pump 1 33, a water outlet pipe 35, a vertical column 34 and a spray pipe net plate 36. The vertical column 34 is fixedly mounted on an end corner of the liquid storage table 2 31 away from the liquid storage table 1 20. The spray pipe net plate 36 is mounted at the end of the vertical column 34, and a safety distance is provided between the spray pipe net plate 36 and the liquid storage table 2 31 so that the spray pipe net plate 36 will not block the oscillating carrier 22 from moving the hatching tray 1. Among them, the spray pipe net plate 36 is composed of a rectangular frame and a tortuous small tube installed in the rectangular frame. A plurality of micro holes arranged at equal intervals are provided below the small tube. The water tank 32 is arranged on the periphery of the second liquid storage table 31, and the submersible pump 1 33 is installed in the water tank 32. The submersible pump 1 33 is connected to the small tube through the outlet pipe 35. In addition, the second liquid storage table 31 is also provided with a return pipe 37 connected to the water tank 32.

[0047] After the hatching tray 1 is placed inside the second liquid storage table 31, the submersible pump 33 is activated, and water from the water tank 32 is pumped into the small tubes and sprayed out through the micropores, forming a mist. This mist covers the hatching tray 1. During this process, the fish sperm and eggs are activated to form fertilized eggs. The fertilized eggs become sticky when exposed to water, and adhere to the hatching tray 1. As the mist continues to spray, the water level in the second liquid storage table 31 reaches the upper limit, and the hatching tray 1 is immersed in the clean water inside the second liquid storage table 31 for cleaning and further fertilization.

[0048] After the hatching tray 1 stays in the shower bed 3 for a predetermined time, the hatching tray 1 can be taken out of the shower bed 3 by the transfer consignor 5 to be transported to the incubator 4 .

[0049] The transfer consignor 5 of this embodiment may have the same structure as the oscillating consignor 22, but the transfer consignor 5 only has a consignment function and no oscillation function. That is, during the operation of the transfer consignor 5, the control switch S1 of the control unit 2 is always in the off state.

[0050] In this embodiment, the operating process of the transfer consignor 5 and the oscillating consignor 22 is as follows. After the oscillating consignor 22 moves the incubation tray 1 to the liquid holding table 2 31, the oscillating consignor 22 stops operating. After the incubation tray 1's dwell time expires, the transfer consignor 5 begins operating, transferring the incubation tray 1 to the incubator 4. The transfer consignor 5 then stops operating, allowing staff to remove the incubation tray 1 and place the fertilized eggs in the incubator 4. The transfer consignor 5 can then be reset. After the transfer consignor 5 transfers the incubation tray 1 out of the homogenizing incubator 2, the oscillating consignor 22 can be reset.

[0051] About incubator 4, it can adopt any existing fry incubator on the market. After the fertilized egg is hatched in incubator 4, a seedling collection box can be placed at the water outlet of incubator 4, for the collection of fry.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A device for automatic fertilization and hatching of fish eggs, characterized in that: The invention comprises an incubation tray (1), a uniform shaking table (2), a shower bed (3) and an incubator (4); the uniform shaking table (2) comprises a liquid storage table (20), a blower (21) and an oscillating carrier (22); a rectangular water tank (23) for placing the incubation tray (1) is provided in the liquid storage table (20), the blower (21) is installed on one side of the liquid storage table (20), and the blower (21) is provided with a nozzle extending above the rectangular water tank (23). The oscillating carrier (22) is installed below the liquid storage table (20), and the oscillating carrier (22) is provided with a supporting surface capable of lifting and vibrating the hatching tray (1) in the rectangular water tank (23) and transporting the hatching tray (1) to the shower bed (3); a transfer carrier (5) for transporting the hatching tray (1) in the shower bed (3) to the incubator (4) is installed between the shower bed (3) and the incubator (4); The oscillating carrier (22) includes a second retarding motor (221), a base rod (222), a first connecting rod (223), a second connecting rod (224), a synchronization rod (225), a supporting rod (226) and a second control unit; the base rod (222) and the second retarding motor (221) are both fixedly mounted below the first liquid storage table (20); the first connecting rod (223) is fixedly mounted on the output shaft of the second retarding motor (221); the second connecting rod (224) is rotatably mounted on an end of the base rod (222) away from the first connecting rod (223); a synchronization rod (225) is rotatably mounted between the first connecting rod (223) and the second connecting rod (224); and the ends of the first connecting rod (223) and the second connecting rod (224) away from the base rod (222) are both rotatably mounted with a supporting rod (226) for supporting the hatching tray (1); the second control unit is electrically connected to the second retarding motor (221); The shower bed (3) includes a second liquid storage table (31) and a shower; the shower includes a water tank (32), a submersible pump (33), a vertical column (34), a water outlet pipe (35) and a spray pipe net plate (36); the second liquid storage table (31) is installed on one side of the first liquid storage table (20), the vertical column (34) is fixedly installed at an end corner of the second liquid storage table (31) away from the side of the first liquid storage table (20), and the spray pipe net plate (36) is installed at the end of the vertical column (34); the water tank (32) is arranged on the periphery of the second liquid storage table (31), the submersible pump (33) is installed in the water tank (32), and the submersible pump (33) is connected to the spray pipe net plate (36) through the water outlet pipe (35).

2. The automatic fertilization and hatching device for fish eggs according to claim 1, characterized in that: The supporting surface formed by the two supporting rods (226) and the synchronous rod (225) and the base rod (222) are parallel to each other.

3. The automatic fertilization and hatching device for fish eggs according to claim 1, characterized in that: The control unit 2 includes an access terminal 1, an access terminal 2, a control switch (S1), a second relay (K2), a third relay (K3), a rectifier bridge 2 (D2), and a variable inductor (L1); the common contact of the second relay (K2) is electrically connected to the access terminal 1, the normally closed contact of the second relay (K2) is electrically connected to one end of the slow-speed motor 2 (221) and one end of the control switch (S1), the other end of the control switch (S1) is electrically connected to an input end of the rectifier bridge 2 (D2), the coils of the second relay (K2) and the third relay (K3) are connected in parallel between the two output ends of the rectifier bridge 2 (D2), the other input end of the rectifier bridge 2 (D2) is electrically connected to the access terminal 2 through the variable inductor (L1); the other end of the slow-speed motor 2 (221) is electrically connected to the end of the variable inductor (L1) away from the rectifier bridge 2 (D2) through the normally closed contact of the third relay (K3).

4. The automatic fertilization and hatching device for fish eggs according to claim 3, characterized in that: The second control unit further includes a fuse (F1) and an X capacitor (C1); the common contact of the second relay (K2) is electrically connected to the first access terminal via the fuse (F1), one end of the X capacitor (C1) is electrically connected to the common contact of the second relay (K2), and the other end of the X capacitor (C1) is electrically connected to the second access terminal.

5. The automatic fertilization and hatching device for fish eggs according to claim 3 or 4, characterized in that: The structure of the transfer consignor (5) is consistent with the structure of the oscillating consignor (22), and the control switch in the transfer consignor (5) is always in an off state.

6. The automatic fertilization and hatching device for fish eggs according to claim 1, characterized in that: The second liquid storage table (31) is provided with a return pipe (37) connected to the water tank (32).

7. The automatic fertilization and hatching device for fish eggs according to claim 1, characterized in that: The spray pipe mesh plate (36) is composed of a rectangular frame and a circuitous small tube installed in the rectangular frame; a plurality of micro holes arranged at equal intervals are opened below the small tube.

8. The automatic fertilization and hatching device for fish eggs according to claim 1, characterized in that: The hatching tray (1) comprises a frame (11) and a mesh (12); the mesh (12) is fixed in the frame (11); handle bars (13) are fixed on both sides of the frame (11); both ends of the handle bars (13) extend to the periphery of the frame (11).

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