A method for culturing and screening of hypophthalmichthys nobilis fertilized eggs

Abstract

The application discloses a method for culturing and screening of zygotes of Megalobrama amblycephala, and steps include: S1, culturing parent fish in a light-proof incubator; S2, a conveying belt is used for receiving and conveying the discharged zygotes; S3, automatic screening is performed according to the characteristics of live eggs and dead eggs, and a collecting assembly is used for cleaning and collecting the live eggs with sticky characteristics; S4, a piston plate reciprocates in a piston cylinder, gas is discharged to the surface of the conveying belt through a bubble tube, and secondary screening is performed on the zygotes; and S5, a piston rod moves to drive a regulating assembly to work through a friction plate, so that the movement speed of the collecting assembly is adjusted. Through the automatic screening of the characteristics of the live eggs and the dead eggs in the conveying process, and the secondary screening of the gas discharged to the surface of the conveying belt through the bubble tube when the conveying assembly works, the piston rod drives the piston plate to reciprocate in the piston cylinder, the dead eggs can be effectively removed, and the overall fertilization rate of the zygotes is improved.

Description

Technical Field

[0001] This invention relates to the field of fish egg screening technology, specifically a method for culturing and screening fertilized eggs of the long-tailed catfish. Background Technology

[0002] Due to the increasing depletion of wild resources of the long-spined catfish, it is crucial to cultivate and breed aquatic organisms artificially and then release them into natural waters to increase the quantity and variety of aquatic resources, protect and restore aquatic resources, and maintain the ecological balance of aquatic organisms. However, under artificial breeding conditions, the gonads of the long-spined catfish parent fish are poorly developed, resulting in an extremely low success rate of natural mating and reproduction. Furthermore, artificial breeding techniques are not yet mature, which limits the large-scale propagation and release of long-spined catfish. Therefore, it is particularly important to explore the reproductive biology of long-spined catfish and conduct research on key technologies for artificial breeding of long-spined catfish in order to better protect and develop this native freshwater fish.

[0003] Currently, the collection of fertilized eggs from broodstock is done by manually squeezing the fish's abdomen to expel the eggs. This method of manual squeezing can damage the reproductive organs of the broodstock and affect their subsequent reproductive capacity. Patent CN111296330B discloses a device and method for breeding and obtaining fertilized eggs of broodstock of the banded seabream, aiming to solve the problems of low survival rate of broodstock and low hatching rate of fertilized eggs during the breeding process of broodstock of the banded seabream. This patent induces the gonads of broodstock of the banded seabream to mature and spawn naturally through a series of comprehensive measures, avoiding damage to the broodstock during artificial insemination processes such as spawning induction, egg squeezing, and sperm squeezing.

[0004] However, the patent does not allow for the screening of dead eggs after the fertilized eggs are released from the parent fish, which reduces the overall fertilization rate of the fertilized eggs. Therefore, this invention proposes a method for culturing and screening fertilized eggs of the long-tailed catfish. Summary of the Invention

[0005] The purpose of this invention is to provide a method for culturing and screening fertilized eggs of the long-rumped catfish to solve the problems mentioned in the background above.

[0006] To achieve the above objectives, this invention proposes a method for culturing and screening fertilized eggs of the long-rumped catfish, comprising the following steps:

[0007] S1. Fill the inside of the incubation box with water, put the parent fish into the incubation box for incubation, and cover the surface of the incubation box with an opaque black cloth;

[0008] S2. The discharged fertilized eggs are received and transported by the conveyor belt in the screening device;

[0009] S3. During the transportation process, live eggs and dead eggs are automatically screened based on their own sinking and sticky properties. When the transportation component is working, the collection component is controlled to clean and collect live eggs with sticky properties.

[0010] S4, the conveying assembly works to control the piston rod to drive the piston sheet to reciprocate in the piston cylinder, to discharge the gas through the bubble pipe to the surface of the conveying belt, and to perform secondary screening on the fertilized eggs;

[0011] S5, the movement of the piston rod drives the adjusting assembly to work through the friction plate, to realize the adjustment of the movement speed of the collecting assembly;

[0012] The screening device comprises a conveying assembly for receiving and conveying the fertilized eggs and a screening assembly for performing secondary screening on the fertilized eggs, the conveying assembly comprises a servo motor and a conveying belt, the output end of the servo motor is fixedly connected with a transmission wheel, one end of the transmission wheel is fixedly connected with a transmission disc; the surface of the conveying belt is fixedly provided with a plurality of barrier belts, the height of the barrier belt is the same as the diameter of the fertilized egg; the barrier belt is made of silica gel;

[0013] The screening assembly comprises a piston cylinder, the surface of the piston cylinder is throughly connected with an air inlet pipe and an air outlet pipe, one-way valves are arranged in the air inlet pipe and the air outlet pipe, the surface of the air outlet pipe is throughly connected with a plurality of bubble pipes, a plurality of through holes are formed in the surface of the bubble pipe.

[0014] Preferably, the screening device further comprises a collecting assembly for collecting the live eggs; the collecting assembly comprises a transmission belt, the output end of the servo motor drives the first conical transmission wheel to rotate through the transmission belt, the first conical transmission wheel drives the second conical transmission wheel to rotate through the adjusting wheel, the surface of the second conical transmission wheel is fixedly connected with a cleaning roller brush, and the cleaning roller brush is made of silica gel.

[0015] Preferably, the screening device further comprises a shunt assembly for guiding the water flow, the shunt assembly comprises a shunt plate, and the surface of the shunt plate is fixedly connected with a friction wheel.

[0016] Preferably, the screening device further comprises an adjusting assembly for improving the collection of the fertilized eggs and improving the uniform distribution effect of the fertilized eggs, the adjusting assembly comprises a driven wheel and a movement rod, the friction wheel is frictionally connected with the movement rod, the surface of the driven wheel is fixedly connected with a lead screw, the movement rod is threadedly engaged with the lead screw, the surface of the movement rod is fixedly connected with a limiting rod, the surface of the limiting rod is slidably connected with an adjusting block, and the adjusting block is rotationally connected with the adjusting wheel.

[0017] Preferably, the surface of the piston cylinder is further throughly connected with a water suction pipe and a water discharge pipe, one end of the water suction pipe is throughly connected with the filter barrel; the water discharge pipe is located above the cleaning roller brush and on one side of the shunt assembly, and one-way valves are arranged in the water suction pipe and the water discharge pipe; the surface of the transmission disc is eccentrically provided with a transmission block, and the surface of the transmission block is rotationally sleeved with a hinged rod.

[0018] Preferably, the inside of the piston cylinder is slidingly connected with a piston rod, the surface of the piston rod is fixedly connected with a friction plate, a piston sheet and a clamping block, and the piston rod is rotationally connected with the hinged rod through the clamping block; the piston rod is frictionally connected with the driven wheel through the friction plate.

[0019] Preferably, the screening device further comprises a cultivation device, the cultivation device comprises a cultivation box, the cultivation box is fixedly arranged above the support frame, a collecting hopper is throughly connected below the cultivation box, the collecting hopper is throughly connected with the filter barrel, a collecting box is throughly arranged on one side of the cultivation box, a sealing baffle and a material taking box are slidingly arranged on the surface of the collecting box, and the sealing baffle and the material taking box are sealingly connected with the collecting box.

[0020] Preferably, the surface of the collecting box is fixedly connected with a limiting seat and a supporting pipe, the limiting seat is rotationally connected with the lead screw, the supporting pipe is rotationally connected with the adjusting wheel, the moving rod is slidingly arranged on the surface of the collecting box, and the friction wheel is rotationally arranged on the surface of the collecting box.

[0021] Preferably, the inside of the filter barrel is provided with filter cotton, and the structures of the cultivation box and the collecting hopper are both conically arranged.

[0022] The beneficial effects of the present application are as follows:

[0023] 1. The present application can effectively remove dead eggs and improve the overall fertilization rate of fertilized eggs by automatically screening the live eggs and dead eggs according to their own characteristics of sinking in water and sticking to objects during the conveying process, and by controlling the piston rod to drive the piston sheet to reciprocate in the piston cylinder during the operation of the conveying assembly, and by discharging the gas into the surface of the conveying belt through the bubble pipe for secondary screening.

[0024] 2. The present application can clean and collect live eggs with sticky characteristics through the collecting assembly, the cleaning roller brush is made of silica gel, and under the premise of not damaging the fertilized eggs, the live eggs can be effectively cleaned off the surface of the conveying belt and collected into the collecting box; by adjusting the rotating speed of the cleaning roller brush, the cleaning effect and the collection efficiency can be improved to adapt to different states of the fertilized eggs; at the same time, the change of the rotating speed of the cleaning roller brush makes the force applied to the fertilized eggs always change, so that the live eggs are evenly distributed in the material taking box, further improving the collection effect.

[0025] 3. The present application can separate and separate the agglomerated fertilized eggs through the barrier belt on the conveying belt, and improve the screening effect; the water flow generated by the shunting assembly is always guided left and right under the action of the adjusting assembly, improving the flowability of the water flow, so that the agglomerated fertilized eggs are more easily dispersed in the constantly changing water flow, further improving the separation effect of the agglomerated fertilized eggs. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a long catfish fertilized egg cultivation screening method step flow chart;

[0027] Figure 2 Fig. 1 is a schematic diagram of the structure of the incubator;

[0028] Figure 3 Fig. 2 is a schematic diagram of the internal structure of the incubator box;

[0029] Figure 4 Fig. 3 is a schematic diagram of the structure of the conveying assembly and the collecting assembly;

[0030] Figure 5 Fig. 4 is a schematic diagram of the position of the screening assembly;

[0031] Figure 6 Fig. 5 is a schematic diagram of the positional relationship between the screening assembly and the shunting assembly;

[0032] Figure 7 Fig. 6 is a schematic diagram of the structure of the screening assembly;

[0033] Figure 8 Fig. 7 is a schematic diagram of the positional relationship of the adjusting assembly;

[0034] Figure 9 Fig. 8 is a schematic diagram of the structure of the adjusting assembly;

[0035] In the drawings: 1, incubator; 11, incubator box; 111, collecting hopper; 112, filtering barrel; 12, support frame; 13, collecting box; 14, sealing baffle; 15, material taking box; 2, conveying assembly; 21, servo motor; 22, transmission wheel; 23, transmission disc; 231, transmission block; 232, hinged rod; 24, conveying belt; 25, blocking belt; 3, collecting assembly; 31, transmission belt; 32, first conical transmission wheel; 33, adjusting wheel; 34, second conical transmission wheel; 35, cleaning roller brush; 4, screening assembly; 41, piston cylinder; 411, air inlet pipe; 412, air outlet pipe; 413, bubble pipe; 414, water suction pipe; 415, water discharge pipe; 42, piston rod; 421, friction plate; 422, piston sheet; 423, clamping block; 5, shunting assembly; 51, shunting plate; 52, friction wheel; 6, adjusting assembly; 61, driven wheel; 611, lead screw; 62, movement rod; 621, limiting rod; 63, adjusting block; 64, limiting seat; 65, support pipe. DETAILED DESCRIPTION

[0036] In the prior art, after the parent fish releases the fertilized eggs, the dead eggs cannot be screened, which reduces the overall fertilization rate of the fertilized eggs;

[0037] Therefore, as Figure 1 shown, the present application provides a method for incubating and screening fertilized eggs of Pseudobagrus eupogus, comprising the following steps:

[0038] S1, water is injected into the inside of the incubator box, the parent fish is placed in the incubator box for incubation, and the surface of the incubator box is covered with a light-proof black cloth;

[0039] S2, the screened fertilized eggs are received and transported by the conveying belt 24 in the screening device;

[0040] S3, the live eggs and dead eggs are automatically screened according to their own sinking water and sticky characteristics during the conveying process, and the collection assembly is controlled to clean and collect the live eggs with sticky characteristics when the conveying assembly is working;

[0041] S4, the piston rod 42 drives the piston sheet 422 to reciprocate inside the piston cylinder 41 when the conveying assembly is working, and the gas is discharged into the surface of the conveying belt 24 through the bubble pipe 413, so as to perform secondary screening on the fertilized eggs;

[0042] S5, the piston rod 42 moves to drive the adjusting assembly 6 to work through the friction plate 421, so as to adjust the movement speed of the collection assembly;

[0043] As shown in Figure 2 and Figure 3 , the screening device comprises a culture device 1, the culture device 1 comprises a culture box 11, the culture box 11 is fixedly arranged above a support frame 12, a collecting hopper 111 is connected through the lower part of the culture box 11, the collecting hopper 111 is connected through a filter barrel 112, a collecting box 13 is arranged through one side of the culture box 11, a sealing baffle 14 and a material taking box 15 are slidably arranged on the surface of the collecting box 13, and the sealing baffle 14 and the material taking box 15 are sealingly connected with the collecting box 13;

[0044] As shown in Figure 4 , the screening device comprises a conveying assembly 2 for receiving and transporting fertilized eggs, the conveying assembly 2 comprises a servo motor 21 and a conveying belt 24, the output end of the servo motor 21 is fixedly connected with a transmission wheel 22, one end of the transmission wheel 22 is fixedly connected with a transmission disc 23; a plurality of barrier strips 25 are fixedly arranged on the surface of the conveying belt 24, the height of the barrier strip 25 is the same as the diameter of the fertilized egg; the material of the barrier strip 25 is silica gel;

[0045] The screening device further comprises a collection assembly 3 for live egg collection; the collection assembly 3 comprises a transmission belt 31, the output end of the servo motor 21 drives the first conical transmission wheel 32 to rotate through the transmission belt 31, the first conical transmission wheel 32 drives the second conical transmission wheel 34 to rotate through the adjusting wheel 33, the surface of the second conical transmission wheel 34 is fixedly connected with a cleaning roller brush 35, and the material of the cleaning roller brush 35 is silica gel;

[0046] After the parent fish spawns, the fertilized eggs will sink to the surface of the conveying belt 24 in 11, and the live eggs have the property of sticking to the surface of the barrier belt 25, while the dead eggs do not have this property, so when the servo motor 21 starts, the output end drives the transmission wheel 22 to rotate, the transmission wheel 22 drives the conveying belt 24 to rotate, thereby conveying the fertilized eggs on the surface of the conveying belt 24, when the fertilized eggs on the surface of the conveying belt 24 are downward, the dead eggs that are not adsorbed on the surface of the conveying belt 24 fall on the surface of the collecting hopper 111, the collecting hopper 111 is conical, so the dead eggs fall into the filter barrel 112 through the slope and are collected;

[0047] When the live eggs pass through the surface of the cleaning roller brush 35, the output end of the servo motor 21 drives the first conical transmission wheel 32 to rotate through the transmission belt 31, the first conical transmission wheel 32 drives the second conical transmission wheel 34 to rotate through the adjusting wheel 33, and the second conical transmission wheel 34 drives the cleaning roller brush 35 to clean the live eggs on the surface of the conveying belt 24, after cleaning, the live eggs are separated from the conveying belt 24 and fall into the inside of the material taking box 15 for collection, thereby completing the screening;

[0048] When the live eggs after screening need to be taken out, the inside water of 11 is isolated from the material taking box 15 by pressing the sealing baffle 14 inside the collecting box 13, then the material taking box 15 is taken out to obtain the live eggs; a valve port is arranged below the support frame 12, and the dead eggs are taken out by opening the valve port.

[0049] The screening device comprises a hatcher 1, the hatcher 1 comprises a hatching box 11, the hatching box 11 is fixedly arranged above a support frame 12, a collecting hopper 111 is connected through the lower portion of the hatching box 11, the collecting hopper 111 is connected through a filter barrel 112, a collecting box 13 is arranged through one side of the hatching box 11, a sealing baffle 14 and a material taking box 15 are slidably arranged on the surface of the collecting box 13, and the sealing baffle 14 and the material taking box 15 are sealingly connected with the collecting box 13;

[0050] The screening device comprises a conveying assembly 2 for receiving and conveying fertilized eggs, the conveying assembly 2 comprises a servo motor 21 and a conveying belt 24, the output end of the servo motor 21 is fixedly connected with a transmission wheel 22, and one end of the transmission wheel 22 is fixedly connected with a transmission disc 23; a plurality of barrier belts 25 are fixedly arranged on the surface of the conveying belt 24, the height of the barrier belt 25 is the same as the diameter of the fertilized egg; the material of the barrier belt 25 is silica gel;

[0051] The screening device further comprises a collecting assembly 3 for collecting live eggs; the collecting assembly 3 comprises a transmission belt 31, the output end of the servo motor 21 drives the first conical transmission wheel 32 to rotate through the transmission belt 31, the first conical transmission wheel 32 drives the second conical transmission wheel 34 to rotate through the adjusting wheel 33, and the surface of the second conical transmission wheel 34 is fixedly connected with a cleaning roller brush 35, and the material of the cleaning roller brush 35 is silica gel;

[0052] As shown in Figure 5 and Figure 6 shown, the screening assembly 4 includes a piston cylinder 41, the surface of the piston cylinder 41 is connected with an air inlet pipe 411 and an air outlet pipe 412, the inside of the air inlet pipe 411 and the air outlet pipe 412 is provided with a one-way valve, the surface of the air outlet pipe 412 is connected with a plurality of bubble pipes 413, and a plurality of through holes are formed in the surface of the bubble pipes 413;

[0053] As shown in Figure 7 , the inside of the piston cylinder 41 is slidably connected with a piston rod 42, the surface of the piston rod 42 is fixedly connected with a friction plate 421, a piston sheet 422 and a clamping block 423, and the piston rod 42 is rotatably connected with the hinge rod 232 through the clamping block 423; the piston rod 42 is frictionally connected with the driven wheel 61 through the friction plate 421;

[0054] The screening device further includes a shunt assembly 5 for guiding the water flow, and the shunt assembly 5 includes a shunt plate 51, and the surface of the shunt plate 51 is fixedly connected with a friction wheel 52;

[0055] When the fertilized eggs fall on the surface of the rotating conveying belt 24, some dead eggs will be adsorbed on the surface of the live eggs when they are shaken, causing the dead eggs to be unable to be screened by natural sinking; then, when the servo motor 21 moves, the transmission disc 23 is driven to rotate by the output end of the servo motor 21, the transmission disc 23 controls one end of the hinge rod 232 to swing through the transmission block 231, the other end of the hinge rod 232 is connected with the clamping block 423, and then the piston rod 42 drives the piston sheet 422 to reciprocally slide in the inside of the piston cylinder 41;

[0056] The left side of the piston cylinder 41 is provided with the air inlet pipe 411 and the air outlet pipe 412, when the piston sheet 422 moves from right to left in the inside of the piston cylinder 41, the one-way valve in the air inlet pipe 411 is closed, the gas is discharged into the inside of the bubble pipe 413 through the water suction pipe 414, at the same time, the one-way valve of the water suction pipe 414 is opened to guide the water in the inside of the filter barrel 112 into the inside of the piston cylinder 41; the gas is discharged through the holes in the surface of the bubble pipe 413, and in the process of discharging, the gas forms dense bubbles in the water, when the bubbles are discharged onto the surface of the conveying belt 24, they will push or shake the fertilized eggs on the surface of the conveying belt 24, thereby performing secondary screening on the dead eggs adsorbed on the surface of the live eggs;

[0057] The right side of the piston cylinder 41 is provided with the water suction pipe 414 and the water discharge pipe 415, when the piston sheet 422 moves from left to right, the one-way valve in the air outlet pipe 412 is closed, and the one-way valve of the air inlet pipe 411 is opened to intake air; at this time, the one-way valve in the water suction pipe 414 is closed, and the one-way valve in the water discharge pipe 415 is opened, then the piston sheet 422 pushes the water and discharges it into the inside of the incubator 11 again through the water discharge pipe 415;

[0058] When the water is discharged, the water is discharged to the surface of the conveying belt 24 to form a water flow, and the barrier belt 25 is arranged on the surface of the conveying belt 24. When the fertilized eggs are aggregated, the aggregated fertilized eggs are blown by the water flow, and the aggregated fertilized eggs are separated by the barrier belt 25, so that the screening effect can be improved.

[0059] At the same time, part of the water flow is discharged to the surface of the cleaning roller brush 35 and generates a certain impact force on the surface of the cleaning roller brush 35, so that the fertilized eggs on the surface of the cleaning roller brush 35 are removed. In addition, the drain pipe 415 is arranged above the cleaning roller brush 35, so that the water flow blows the cleaning roller brush 35 from top to bottom, and the fertilized eggs cleaned by the cleaning roller brush 35 are blown to the lower side of the cleaning roller brush 35, thereby improving the collection effect.

[0060] The screening device comprises a culture device 1, the culture device 1 comprises a culture box 11, the culture box 11 is fixedly arranged above a support frame 12, a collecting hopper 111 is connected through the lower side of the culture box 11, the collecting hopper 111 is connected through a filter barrel 112, a collecting box 13 is arranged through one side of the culture box 11, a sealing baffle 14 and a material taking box 15 are slidably arranged on the surface of the collecting box 13, and the sealing baffle 14 and the material taking box 15 are sealingly connected with the collecting box 13.

[0061] The screening device comprises a conveying assembly 2 for receiving and conveying fertilized eggs, the conveying assembly 2 comprises a servo motor 21 and a conveying belt 24, the output end of the servo motor 21 is fixedly connected with a transmission wheel 22, one end of the transmission wheel 22 is fixedly connected with a transmission disc 23, and the surface of the conveying belt 24 is fixedly provided with a plurality of barrier belts 25.

[0062] The screening device further comprises a collecting assembly 3 for collecting live eggs; the collecting assembly 3 comprises a transmission belt 31, the output end of the servo motor 21 drives a first conical transmission wheel 32 to rotate through the transmission belt 31, the first conical transmission wheel 32 drives a second conical transmission wheel 34 to rotate through an adjusting wheel 33, the surface of the second conical transmission wheel 34 is fixedly connected with a cleaning roller brush 35, and the cleaning roller brush 35 is made of silica gel.

[0063] The screening assembly 4 comprises a piston cylinder 41, the surface of the piston cylinder 41 is connected through an air inlet pipe 411 and an air outlet pipe 412, one-way valves are arranged in the air inlet pipe 411 and the air outlet pipe 412, the surface of the air outlet pipe 412 is connected through a plurality of bubble pipes 413, and a plurality of through holes are formed in the surface of the bubble pipes 413.

[0064] The piston rod 42 is slidably connected in the interior of the piston cylinder 41, and the surface of the piston rod 42 is fixedly connected with a friction plate 421, a piston sheet 422 and a clamping block 423, and the piston rod 42 is rotatably connected with the hinge rod 232 through the clamping block 423; and the piston rod 42 is frictionally connected with the driven wheel 61 through the friction plate 421.

[0065] The screening device further comprises a shunt assembly 5 for guiding the water flow, and the shunt assembly 5 comprises a shunt plate 51, and the surface of the shunt plate 51 is fixedly connected with a friction wheel 52.

[0066] As shown in Figure 8 and Figure 9 The screening device further comprises an adjusting assembly 6 for improving the collection of the fertilized eggs and improving the uniform distribution effect of the fertilized eggs, and the adjusting assembly 6 comprises a driven wheel 61 and a moving rod 62, the friction wheel 52 is frictionally connected with the moving rod 62, the surface of the driven wheel 61 is fixedly connected with a lead screw 611, the moving rod 62 is threadedly engaged with the lead screw 611, the surface of the moving rod 62 is fixedly connected with a limiting rod 621, the surface of the limiting rod 621 is slidably connected with an adjusting block 63, and the adjusting block 63 is rotatably connected with the adjusting wheel 33.

[0067] In order to further improve the separation of the agglomerated fertilized eggs and improve the collection efficiency of the fertilized eggs on the surface of the conveying belt 24, the friction plate 421 is arranged on the surface of the piston rod 42, the driven wheel 61 is controlled to reciprocate rotate through the friction plate 421 when the piston rod 42 reciprocates, the lead screw 611 is driven to reciprocate rotate by the reciprocating rotation of the driven wheel 61, and the moving rod 62 is controlled to reciprocate slide through the lead screw 611; the moving rod 62 reciprocate slides and rubs against the friction wheel 52, so that the shunt plate 51 swings left and right, thereby always guiding the water flow left and right, improving the flowability of the water flow, and the agglomerated fertilized eggs are more easily dispersed in the constantly changing water flow, thereby further improving the separation effect of the agglomerated fertilized eggs.

[0068] Meanwhile, since the fertilized eggs of different parent fish may differ in the degree of adhesion and distribution, the moving rod 62 reciprocates and drives the adjusting wheel 33 to always slide on the surfaces of the first and second taper transmission wheels 32 and 34 through the adjusting block 63, so that the rotating speed of the cleaning roller brush 35 can be adjusted; by adjusting the rotating speed of the cleaning roller brush 35, various states of the fertilized eggs can be better adapted to.

[0069] Moreover, since the rotating speed of the cleaning roller brush 35 is always in a state of change, the force applied to the fertilized eggs is always changing without damaging the fertilized eggs; the greater the flinging force applied to the live eggs on the surface of the conveying belt 24 when the rotating speed of the cleaning roller brush 35 is the greatest, the more the live eggs can be brought to the outermost side of the material taking box 15, and vice versa when the rotating speed of the cleaning roller brush 35 is smaller, so that the live eggs can be evenly distributed in the interior of the material taking box 15, thereby improving the collection effect.

[0070] The above embodiments only express the implementation of the present application, and cannot be understood as the limitation of the patent scope of the application, nor any form of limitation on the structure of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of changes and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A method for screening and selecting fertilized eggs of Leiocassis prochilus, characterized by the steps of: The method comprises the following steps: ​ S1, water is injected into the inside of the incubator, and the parent fish is put into the incubator for incubation, and the surface of the incubator is covered with a light-proof black cloth; S2, the hatched eggs are received and transported by the conveying belt in the screening device; S3, during the conveying process, the live eggs and dead eggs are automatically screened according to the characteristics of the live eggs and dead eggs sinking in water and adhering to objects, and the conveying assembly controls the collection assembly to clean and collect the live eggs with the object adhering characteristic when the conveying assembly is working; S4, when the conveying assembly is working, the piston rod drives the piston sheet to reciprocate in the piston cylinder, gas is discharged to the surface of the conveying belt through the bubble pipe, and the hatched eggs are screened again; S5, the movement of the piston rod drives the adjusting assembly to work through the friction plate, and the movement speed of the collection assembly is adjusted; The screening device comprises a conveying assembly (2) for receiving and transporting the hatched eggs and a screening assembly (4) for screening the hatched eggs again, the conveying assembly (2) comprises a servo motor (21) and a conveying belt (24), the output end of the servo motor (21) is fixedly connected with a transmission wheel (22), one end of the transmission wheel (22) is fixedly connected with a transmission disc (23), and the surface of the conveying belt (24) is fixedly provided with a plurality of blocking belts (25), the height of the blocking belt (25) is the same as the diameter of the hatched egg, and the material of the blocking belt (25) is silica gel; The screening assembly (4) comprises a piston cylinder (41), the surface of the piston cylinder (41) is throughly connected with an air inlet pipe (411) and an air outlet pipe (412), one-way valves are arranged in the air inlet pipe (411) and the air outlet pipe (412), and the surface of the air outlet pipe (412) is throughly connected with a plurality of bubble pipes (413), a plurality of through holes are formed in the surface of the bubble pipe (413).

2. The method according to claim 1, wherein the method is for screening of Hypophthalmichthys nobilis zygotes. The screening device further comprises a collection assembly (3) for collecting live eggs, the collection assembly (3) comprises a transmission belt (31), the output end of the servo motor (21) drives a first conical transmission wheel (32) to rotate through the transmission belt (31), the first conical transmission wheel (32) drives a second conical transmission wheel (34) to rotate through an adjusting wheel (33), the surface of the second conical transmission wheel (34) is fixedly connected with a cleaning roller brush (35), and the material of the cleaning roller brush (35) is silica gel.

3. The method according to claim 2, wherein the method is for screening of the fertilized eggs of the Megalobrama amblycephala. The screening device further comprises a shunt assembly (5) for guiding water flow, and the shunt assembly (5) comprises a shunt plate (51), and the surface of the shunt plate (51) is fixedly connected with a friction wheel (52). ​ 4. The method according to claim 3, wherein the fish is Ietalurus caviarius. The screening device further comprises an adjusting assembly (6) for improving the collection of hatched eggs and improving the uniform distribution effect of the hatched eggs, the adjusting assembly (6) comprises a driven wheel (61) and a movement rod (62), the friction wheel (52) is frictionally connected with the movement rod (62), the surface of the driven wheel (61) is fixedly connected with a lead screw (611), the movement rod (62) is threadedly engaged with the lead screw (611), the surface of the movement rod (62) is fixedly connected with a limiting rod (621), the surface of the limiting rod (621) is slidably connected with an adjusting block (63), and the adjusting block (63) is rotatably connected with the adjusting wheel (33).

5. The method of claim 1, wherein the method is for screening of Hypophthalmichthys nobilis zygotes. The surface of the piston cylinder (41) is also connected with a water suction pipe (414) and a drain pipe (415) through connection, one end of the water suction pipe (414) is connected with the filter bucket (112) through connection; the drain pipe (415) is located above the cleaning roller brush (35) and one side of the shunt assembly (5), and the water suction pipe (414) and the drain pipe (415) are provided with one-way valves inside; the surface of the transmission disc (23) is eccentrically provided with a transmission block (231), and the surface of the transmission block (231) is rotatably provided with a hinged rod (232).

6. The method according to claim 5, wherein the fish is Ietalurus catus. The inside of the piston cylinder (41) is slidably connected with a piston rod (42), the surface of the piston rod (42) is fixedly connected with a friction plate (421), a piston sheet (422) and a clamping block (423), the piston rod (42) is rotatably connected with the hinged rod (232) through the clamping block (423); the piston rod (42) is frictionally connected with the driven wheel (61) through the friction plate (421).

7. The method according to claim 1, wherein the fish is Ietalurus caviarius. The screening device further comprises a cultivator (1), the cultivator (1) comprises a cultivation box (11), the cultivation box (11) is fixedly arranged above the support frame (12), the lower side of the cultivation box (11) is connected with a collecting hopper (111) through connection, the collecting hopper (111) is connected with the filter bucket (112) through connection, one side of the cultivation box (11) is provided with a collecting box (13) through connection, the surface of the collecting box (13) is slidably provided with a sealing baffle (14) and a material taking box (15), the sealing baffle (14) and the material taking box (15) are sealingly connected with the collecting box (13).

8. The method according to claim 7, wherein the fish is Ietalurus catus. The surface of the collecting box (13) is fixedly connected with a limiting seat (64) and a supporting pipe (65), the limiting seat (64) is rotatably connected with the lead screw (611), the supporting pipe (65) is rotatably connected with the adjusting wheel (33), the movement rod (62) slides on the surface of the collecting box (13), and the friction wheel (52) rotates on the surface of the collecting box (13).

9. The method according to claim 7, wherein the fish is Ietalurus catus. The inside of the filter bucket (112) is provided with filter cotton, and the structures of the cultivation box (11) and the collecting hopper (111) are both conical.

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