Cold water fish breeding and hatching device

Abstract

The invention discloses a cold water fish breeding and hatching device, and relates to the technical field of cold water fish breeding and hatching devices, the cold water fish breeding and hatching device comprises a hatching pond, and two drainage holes are formed in the bottom of the hatching pond. During use, two drainage holes are plugged through a first plugging plate and a second plugging plate, then a motor is started, a plurality of flushing heads move back and forth through output of the motor, meanwhile, a separation net moves through output of the motor, and then water is added through a first connecting pipe and a second connecting pipe; when the fish eggs are separated, the fish eggs move in the direction opposite to the separation net, at the moment, the fish eggs pass through the separation net, hatched fishes cannot pass through, then a first lifting plate or a second lifting plate is reset, at the moment, a first plugging plate or a second plugging plate cancels plugging of water drainage holes, and then the separated fishes are discharged through the water drainage holes; therefore, the hatched fish and the roe can be conveniently separated, the influence of the first hatched fish on the unhatched roe is reduced, and the device is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of cold-water fish breeding and hatching devices, and particularly relates to a cold-water fish breeding and hatching device. Background Art

[0002] Cold-water fish is a type of fish. Mainly, according to the requirements of fish for the living environment, especially the water temperature, they cannot survive at water temperatures above 20 degrees, so they are called cold-water fish. Of course, there are also newly cultivated varieties with stronger adaptability. During the process of artificially cultivating cold-water fish, the initial and most basic breeding is the hatching of fry. The hatching of some rare varieties of cold-water fish requires corresponding hatching equipment for assistance.

[0003] In the prior art, during the breeding and hatching process of cold-water fish, fish eggs are generally placed in an incubation cylinder or an incubation pond for hatching, and the water is made to flow during the hatching process, and the water temperature is controlled. However, when placing the fish eggs, generally multiple eggs are placed, and the hatching progress of each fish egg is different. The fish that hatches first is likely to damage the unhatched fish eggs. If not cleaned up, it is likely to affect the overall number of cold-water fish reproduced. Some are separated by a fishing net, but when fishing, it is easy to apply too much force or move back and forth, causing damage to the fish eggs, and it is not convenient to use. In view of the deficiencies of the prior art, the present invention discloses a cold-water fish breeding and hatching device to solve the above problems. Summary of the Invention

[0004] The purpose of the present application is to provide a cold-water fish breeding and hatching device to solve the problems mentioned in the above background art, that is, when placing the fish eggs, generally multiple eggs are placed, and the hatching progress of each fish egg is different. The fish that hatches first is likely to damage the unhatched fish eggs. If not cleaned up, it is likely to affect the overall number of cold-water fish reproduced. Some are separated by a fishing net, but when fishing, it is easy to apply too much force or move back and forth, causing damage to the fish eggs, and it is not convenient to use.

[0005] To achieve the above purpose, the present application provides the following technical solution: A cold-water fish breeding and hatching device, including an incubation pond, wherein two water discharge holes are opened at the bottom of the incubation pond, and a separation mechanism adapted to the water discharge holes is arranged on the incubation pond;

[0006] The separation mechanism includes two L-shaped blocks arranged above the hatching pool. Cavities are provided in both L-shaped blocks. The tops of the two L-shaped blocks are respectively installed with a first connecting pipe and a second connecting pipe communicating with the cavities. A plurality of shunt pipes communicating with the cavities are respectively installed on the bottom inner walls of the two L-shaped blocks. A plurality of water jet heads are provided on each of the plurality of shunt pipes. A separation net is arranged in the hatching pool. A driving assembly for moving the two L-shaped blocks and the separation net is arranged on the hatching pool. A plugging and isolating assembly adapted to the two drain holes is arranged on the hatching pool.

[0007] Preferably, the driving assembly includes a motor installed on the side of the hatching pool. Two grooves and a moving groove are formed in the top of the hatching pool. The opposite inner walls of the two grooves are respectively rotatably installed with reciprocating lead screws. One end of one of the reciprocating lead screws extends outside the hatching pool and is installed on the output shaft of the motor. The two L-shaped blocks are respectively threadedly sleeved on the two reciprocating lead screws. The opposite inner walls of the moving groove are rotatably installed with a threaded rod. A threaded block is threadedly sleeved on the threaded rod. The top of the threaded block is detachably installed with a mounting plate. A moving block is installed on the side of the mounting plate. The separation net is installed at the bottom of the moving block. The other reciprocating lead screw and the threaded rod are both cooperatively installed with one of the reciprocating lead screws through a transmission unit.

[0008] Preferably, the transmission unit includes a transmission cavity formed in the hatching pool. A first bevel gear is sleeved on one of the reciprocating lead screws. One end of the threaded rod extends into the transmission cavity and is installed with a second bevel gear. The first bevel gear meshes with the second bevel gear. One ends of the two reciprocating lead screws both extend outside the hatching pool and are respectively installed with transmission wheels. A belt is tensioned on the two transmission wheels.

[0009] Preferably, a mounting hole is formed in the top of the mounting plate. A fixing bolt is movably installed on the mounting hole. A fixing threaded groove is formed in the top of the threaded block. The end of the fixing bolt is threadedly installed in the fixing threaded groove.

[0010] Preferably, the plugging and isolating assembly includes two fixing grooves respectively formed on both sides of the hatching pool. The opposite inner walls of the four fixing grooves are respectively installed with telescopic rods. The ends of the two telescopic rods on one side are jointly installed with a movable block. A first plugging plate and a second plugging plate are respectively installed on the sides of the two movable blocks. Avoidance holes communicating with the two drain holes are respectively formed on the opposite sides of the hatching pool. The first plugging plate and the second plugging plate respectively penetrate through the two avoidance holes. Elastic units are arranged on the sides of the two movable blocks. An isolating unit for moving the two movable blocks respectively is arranged on the hatching pool.

[0011] Preferably, the elastic unit includes two springs installed on the side of the movable block, and the other ends of the two springs are respectively installed on the inner walls of the sides of the two fixed grooves.

[0012] Preferably, the isolation unit includes two fixed blocks installed on the side of the hatching pond. Electric push rods are installed at the bottoms of the two fixed blocks. Lifting blocks are installed at the output ends of the two electric push rods. A first lifting plate and a second lifting plate are respectively installed at the tops of the two lifting blocks. Isolation holes are formed in the sides of the first lifting plate and the second lifting plate. Filter nets are installed on the two isolation holes. Two isolation holes are formed in the bottom of the hatching pond. The first lifting plate and the second lifting plate respectively penetrate through the two isolation holes. Pressing elements for moving the movable block are respectively arranged on the two lifting blocks.

[0013] Preferably, the pressing elements include L-shaped pressing plates respectively installed on the sides of the two lifting blocks, and trapezoidal blocks are installed on the sides of the two movable blocks.

[0014] Preferably, two inclined plates adapted to the water discharge holes are installed at the bottom of the hatching pond, and two collection boxes are arranged below the hatching pond.

[0015] Preferably, four support legs are installed at the bottom of the hatching pond, and a PLC controller is installed on the side of the hatching pond.

[0016] In summary, the technical effects and advantages of the present invention are as follows:

[0017] 1. In the present invention, when in use, first, the two water discharge holes are blocked by the first blocking plate and the second blocking plate, then the motor is started. The output of the motor causes the multiple water jet heads to move back and forth, and at the same time, the output of the motor causes the separation net to move. Then, water is added through the first connecting pipe and the second connecting pipe, so that the fish eggs move in the direction opposite to the separation net. At this time, the fish eggs will pass through the separation net, while the hatched fish cannot pass through. Then, the first lifting plate or the second lifting plate is reset. At this time, the first blocking plate or the second blocking plate will cancel the blocking of the water discharge hole, so that the separated fish are discharged through the water discharge hole, thereby facilitating the separation of the hatched fish and the fish eggs, reducing the influence of the hatched fish on the unhatched fish eggs, and being convenient to use.

[0018] 2. In the present invention, when diverting the hatched fish or maintaining the water flow, the filter nets on the first lifting plate and the second lifting plate will block the fish eggs to prevent the fish eggs from flowing out of the water discharge hole along with the water flow. And through the arrangement of the L-shaped pressing plates, trapezoidal blocks and springs, the first blocking plate and the second blocking plate move along with the first lifting plate and the second lifting plate, without the need for additional operations, which is convenient to use.

[0019] 3. In the present invention, through the setting of the inclined plate, the dropping height of the hatched fish is reduced to avoid damage to the fish caused by too high a dropping height. Through the setting of the collection box, the water flow is collected during hatching to avoid waste. At the same time, during separation, the hatched fish are collected. Through the setting of the mounting plate and the fixing bolts, it is convenient to replace the separation net to avoid damage during long-term use and affecting the use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a three-dimensional structure schematic diagram of the first perspective in the embodiment of the present invention;

[0022] Figure 2 is Figure 1 the enlarged structure schematic diagram at A in

[0023] Figure 3 It is a three-dimensional structure schematic diagram of the second perspective in the embodiment of the present invention;

[0024] Figure 4 It is a three-dimensional structure schematic diagram of the first perspective with a partial section in the embodiment of the present invention;

[0025] Figure 5 is Figure 4 the partial enlarged structure schematic diagram in

[0026] Figure 6 It is a three-dimensional structure schematic diagram of the second perspective with a partial section in the embodiment of the present invention.

[0027] In the figure: 1, hatching pond; 2, motor; 3, reciprocating lead screw; 4, L-shaped block; 5, shunt pipe; 6, flushing head; 7, first connecting pipe; 8, second connecting pipe; 9, threaded rod; 10, threaded block; 11, mounting plate; 12, fixing bolt; 13, moving block; 14, separation net; 15, fixing block; 16, electric push rod; 17, lifting block; 18, first lifting plate; 19, second lifting plate; 20, filter screen; 21, telescopic rod; 22, movable block; 23, first sealing plate; 24, second sealing plate; 25, spring; 26, L-shaped pressing plate; 27, trapezoidal block; 28, first bevel gear; 29, second bevel gear; 30, transmission wheel; 31, belt; 32, inclined plate; 33, collection box; 34, drain hole; 35, support leg; 36, PLC controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment: Refer to Figures 1 - 6 A cold-water fish breeding and hatching device shown in the figure, which includes an incubation pond 1. Two drain holes 34 are opened at the bottom of the incubation pond 1, and a separation mechanism adapted to the drain holes 34 is provided on the incubation pond 1;

[0030] The separation mechanism includes two L-shaped blocks 4 arranged above the incubation pond 1. Cavities are provided in both L-shaped blocks 4. A first connecting pipe 7 and a second connecting pipe 8 communicating with the cavities are respectively installed at the tops of the two L-shaped blocks 4. A plurality of shunt pipes 5 communicating with the cavities are respectively installed on the inner walls of the bottoms of the two L-shaped blocks 4. A plurality of water jet heads 6 are provided on each of the plurality of shunt pipes 5. A separation net 14 is arranged in the incubation pond 1. A driving component for moving the two L-shaped blocks 4 and the separation net 14 is provided on the incubation pond 1. A plugging and isolation component adapted to the two drain holes 34 is provided on the incubation pond 1.

[0031] With the above structure, when in use, first, the two drain holes 34 are plugged by the plugging and isolation component, and then the L-shaped blocks 4 are moved back and forth by the driving component. The back-and-forth movement of the L-shaped blocks 4 will cause the plurality of water jet heads 6 to move back and forth through the shunt pipes 5. At the same time, the driving component will move the separation net 14. Then, through the first connecting pipe 7, the fish eggs are moved in the direction opposite to the separation net 14. At this time, the fish eggs will pass through the separation net 14, while the hatched fish cannot pass through. When the separation net 14 moves to a certain position, the plugging of one of the drain holes 34 is cancelled by the plugging and isolation component. At this time, the hatched fish will flow out through the drain hole 34, and the plugging and isolation component will block the fish eggs on the other side to prevent the fish eggs from flowing out together. Thus, the separated fish are discharged through the drain hole 34, which is convenient for separating the hatched fish and the fish eggs, reducing the influence of the hatched fish on the unhatched fish eggs, and facilitating use. At this time, the water injection operation is carried out through the second connecting pipe 8. When separation is required again, reverse the above operations to separate again, which is convenient for use.

[0032] Such as Figures 4 - 5As shown in the figure, the driving assembly includes a motor 2 installed on the side of the hatching pond 1. Two grooves and a moving groove are formed at the top of the hatching pond 1. The opposite inner walls of the two grooves are rotatably installed with reciprocating lead screws 3. One end of one of the reciprocating lead screws 3 extends outside the hatching pond 1 and is installed on the output shaft of the motor 2. Two L-shaped blocks 4 are respectively threadedly sleeved on the two reciprocating lead screws 3. The opposite inner walls of the moving groove are rotatably installed with a threaded rod 9. A threaded block 10 is threadedly sleeved on the threaded rod 9. The top of the threaded block 10 is detachably installed with a mounting plate 11. A moving block 13 is installed on the side of the mounting plate 11. The separation net 14 is installed at the bottom of the moving block 13. The other reciprocating lead screw 3 and the threaded rod 9 are both installed in cooperation with one of the reciprocating lead screws 3 through a transmission unit. The advantage of such a setting is that through the setting of the motor 2 and the reciprocating lead screw 3, it is convenient to move the water jet head 6, so that the fish eggs at multiple positions in the hatching pond 1 move to one side. Through the setting of the threaded rod 9, the threaded block 10, the mounting plate 11 and the moving block 13, it is convenient to move the separation net 14, so as to separate the fish eggs and the hatched fish.

[0033] As Figure 3 and Figure 5 shown in the figure, the transmission unit includes a transmission cavity formed in the hatching pond 1. A first bevel gear 28 is sleeved on one of the reciprocating lead screws 3. One end of the threaded rod 9 extends into the transmission cavity and is installed with a second bevel gear 29. The first bevel gear 28 meshes with the second bevel gear 29. One end of each of the two reciprocating lead screws 3 extends outside the hatching pond 1 and is respectively installed with a transmission wheel 30. A belt 31 is tensioned on the two transmission wheels 30. The advantage of such a setting is that through the setting of the first bevel gear 28, the second bevel gear 29, the transmission wheels 30 and the belt 31, when one of the reciprocating lead screws 3 rotates, the other reciprocating lead screw 3 and the threaded rod 9 rotate.

[0034] As Figure 2 shown in the figure, a mounting hole is formed at the top of the mounting plate 11. A fixing bolt 12 is movably installed on the mounting hole. A fixing threaded groove is formed at the top of the threaded block 10. The end of the fixing bolt 12 is threadedly installed in the fixing threaded groove. The advantage of such a setting is that through the setting of the fixing bolt 12, the mounting plate 11 can be disassembled, so as to facilitate the replacement of the separation net 14.

[0035] As Figure 4 and Figure 6As shown in the figure, the plugging and isolating component includes two fixing grooves respectively opened on both sides of the hatching pond 1. The opposite inner walls of the four fixing grooves are all equipped with telescopic rods 21. The ends of the two telescopic rods 21 on one side are jointly equipped with a movable block 22. The side parts of the two movable blocks 22 are respectively equipped with a first plugging plate 23 and a second plugging plate 24. Avoidance holes communicating with the two drain holes 34 are respectively opened on the mutually remote side parts of the hatching pond 1. The first plugging plate 23 and the second plugging plate 24 respectively penetrate through the two avoidance holes. Elastic units are arranged on the side parts of the two movable blocks 22. An isolating unit for respectively moving the two movable blocks 22 is arranged on the hatching pond 1. The advantage of such a setting is that through the settings of the telescopic rod 21, the movable block 22, the first plugging plate 23 and the second plugging plate 24, it is convenient to plug the two drain holes 34 and avoid the fish eggs flowing out from the drain holes 34 during use.

[0036] As Figure 4 shown in the figure, the elastic unit includes two springs 25 installed on the side part of the movable block 22. The other ends of the two springs 25 are respectively installed on the side inner walls of the two fixing grooves. The advantage of such a setting is that through the setting of the spring 25, when the isolating unit does not apply force to the movable block 22, at this time the movable block 22 will reset under the action of the spring 25.

[0037] As Figure 1 shown in the figure, the isolating unit includes two fixing blocks 15 installed on the side part of the hatching pond 1. Electric push rods 16 are installed at the bottoms of the two fixing blocks 15. Lifting blocks 17 are installed at the output ends of the two electric push rods 16. A first lifting plate 18 and a second lifting plate 19 are respectively installed on the tops of the two lifting blocks 17. Isolation holes are respectively opened on the side parts of the first lifting plate 18 and the second lifting plate 19. Filter meshes 20 are installed on the two isolation holes. Two isolation holes are opened at the bottom of the hatching pond 1. The first lifting plate 18 and the second lifting plate 19 respectively penetrate through the two isolation holes. Extrusion elements for moving the movable block 22 are respectively arranged on the two lifting blocks 17. The advantage of such a setting is that through the settings of the fixing block 15, the electric push rod 16, the lifting block 17, the first lifting plate 18, the second lifting plate 19 and the filter mesh 20, when diverting the hatched fish or maintaining the water fluidity, the fish eggs are blocked to avoid the fish eggs flowing out from the drain holes 34 along with the water flow.

[0038] As Figure 1 shown in the figure, the extrusion element includes L-shaped extrusion plates 26 respectively installed on the side parts of the two lifting blocks 17. Trapezoidal blocks 27 are installed on the side parts of the two movable blocks 22. The advantage of such a setting is that through the settings of the L-shaped extrusion plate 26 and the trapezoidal block 27, the first plugging plate 23 and the second plugging plate 24 move along with the first lifting plate 18 and the second lifting plate 19, without the need for additional operations, which is convenient for use.

[0039] As Figure 1As shown in the figure, two inclined plates 32 adapted to the drain holes 34 are installed at the bottom of the hatching pond 1, and two collection boxes 33 are arranged below the hatching pond 1. The advantage of this setting is that through the setting of the inclined plates 32, the dropping height of the hatched fish is reduced, avoiding damage to the fish caused by too high a dropping height. Through the setting of the collection boxes 33, the water flow is collected during hatching to avoid waste, and at the same time, the hatched fish are collected during separation.

[0040] As Figure 1 shown in the figure, four support legs 35 are installed at the bottom of the hatching pond 1, and a PLC controller 36 is installed on the side of the hatching pond 1. The advantage of this setting is that through the setting of the support legs 35, it is convenient to support the hatching pond 1, and through the setting of the PLC controller 36, it is convenient to control the motor 2 and the electric push rod 16.

[0041] The working principle of the present invention:

[0042] During use, first place the separation net 14 at the far left. Then, through the PLC controller 36, the two electric push rods 16 are respectively retracted or extended. When one electric push rod 16 retracts, one lifting block 17 will descend. When one lifting block 17 descends, the first lifting plate 18 will descend. At the same time, when one lifting block 17 descends, the extrusion on one trapezoidal block 27 will be cancelled. At this time, one movable block 22 will reset under the action of the telescopic rod 21 and the spring 25. When one movable block 22 resets, the first sealing plate 23 will reset, thereby blocking one water discharge hole 34. At the same time, when the other electric push rod 16 extends, the second lifting plate 19 will move through the lifting block 17. When the second lifting plate 19 rises, the other L-shaped extrusion plate 26 will rise. When the other L-shaped extrusion plate 26 rises, it will squeeze the other trapezoidal block 27, causing one movable block 22 to move. When the other movable block 22 moves, the second sealing plate 24 will move, thereby cancelling the blockage of the other water discharge hole 34. When the other L-shaped extrusion plate 26 contacts the vertical surface of the other trapezoidal block 27, make the second lifting plate 19 continue to rise, so that the filter net 20 is in the hatching pond 1. At this time, connect the first connecting pipe 7 to an external water pump, so that water is added through the first connecting pipe 7, through the cavity of the L-shaped block 4 and the shunt pipe 5 from multiple water jet heads 6. At this time, the water will flow out from the other water discharge hole 34 through the filter net 20 on the second lifting plate 19 to ensure the fluidity of the water. Then place the fish eggs in the middle of the hatching pond 1 for hatching. At this time, the fish eggs will flow to the left driven by the water flow and then be blocked by the filter net 20 on the second lifting plate 19. When individual fish eggs hatch, first cancel the water inlet of the first connecting pipe 7, then make the second sealing plate 24 reset through the electric push rod 16, and then turn on the motor 2. The output of the motor 2 will cause one reciprocating lead screw 3 to rotate. When one reciprocating lead screw 3 rotates, the L-shaped block 4 will move reciprocally. When the L-shaped block 4 moves reciprocally, the shunt pipe 5 will move, thereby causing the water jet head 6 to move. At the same time, when the reciprocating lead screw 3 rotates, it will cause the threaded rod 9 to rotate through the first bevel gear 28 and the second bevel gear 29. When the threaded rod 9 rotates, the threaded block 10 will move. When the threaded block 10 moves, the mounting plate 11 will move. When the mounting plate 11 moves, the moving block 13 will move. When the moving block 13 moves, the separation net 14 will move. When the separation net 14 is on the right side of the first lifting plate 18, first inject water through the first connecting pipe 7. At this time, the water will be sprayed out from the reciprocating water jet head 6, causing the fish eggs in multiple positions to flow to the left, passing through the separation net 14. At this time, the hatched fish cannot pass through the separation net 14. Then make the first lifting plate 18 rise and isolate it through the filter net 20. At the same time, the first sealing plate 23 will move to cancel the blockage of the water discharge hole 34 on the right side, so that the separated fish will flow through the water discharge hole 34 and the inclined plate 32 into the collection box 33, which is convenient for separating the hatched fish and fish eggs, reducing the impact of the hatched fish on the unhatched fish eggs and facilitating use.Meanwhile, water addition operation is carried out through the second connecting pipe 8. At this time, the fish eggs will move to the left and be blocked by the filter screen 20 on the first lifting plate 18. When the fish eggs hatch again, repeating the above operations in reverse can separate the fish and fish eggs again. At the same time, when one of the reciprocating lead screws 3 rotates, it will cause the other reciprocating lead screw 3 to rotate through the transmission wheel 30 and the belt 31, and then make the water jet head 6 on the other side move back and forth, so as to move the fish eggs at various positions from the other side, which is convenient for use.

[0043] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cold-water fish breeding and hatching device, comprising an incubation pond (1), characterized in that: Two drain holes (34) are formed in the bottom of the hatching pond (1), and a separating mechanism adapted to the drain holes (34) is arranged on the hatching pond (1). The separating mechanism includes two L-shaped blocks (4) arranged above the hatching pond (1). Cavities are provided in both L-shaped blocks (4). The tops of the two L-shaped blocks (4) are respectively installed with a first connecting pipe (7) and a second connecting pipe (8) communicating with the cavities. A plurality of flow dividing pipes (5) communicating with the cavities are respectively installed on the bottom inner walls of the two L-shaped blocks (4). A plurality of water jet heads (6) are arranged on each of the plurality of flow dividing pipes (5). A separating net (14) is arranged in the hatching pond (1). A driving assembly for moving the two L-shaped blocks (4) and the separating net (14) is arranged on the hatching pond (1). A plugging and isolating assembly adapted to the two drain holes (34) is arranged on the hatching pond (1).

2. The cold water fish breeding and hatching device according to claim 1, wherein: The driving assembly includes a motor (2) installed on the side of the hatching pond (1). Two grooves and a moving groove are formed in the top of the hatching pond (1). Reciprocating lead screws (3) are rotatably installed on the opposite inner walls of the two grooves. One end of one of the reciprocating lead screws (3) extends outside the hatching pond (1) and is installed on the output shaft of the motor (2). The two L-shaped blocks (4) are respectively sleeved on the two reciprocating lead screws (3). A threaded rod (9) is rotatably installed on the opposite inner walls of the moving groove. A threaded block (10) is sleeved on the threaded rod (9). A mounting plate (11) is detachably installed on the top of the threaded block (10). A moving block (13) is installed on the side of the mounting plate (11). The separating net (14) is installed on the bottom of the moving block (13). The other reciprocating lead screw (3) and the threaded rod (9) are both installed in cooperation with one of the reciprocating lead screws (3) through a transmission unit.

3. The cold water fish breeding and hatching device according to claim 2, characterized in that: The transmission unit includes a transmission cavity formed in the hatching pond (1). A first bevel gear (28) is sleeved on one of the reciprocating lead screws (3). One end of the threaded rod (9) extends into the transmission cavity and is installed with a second bevel gear (29). The first bevel gear (28) meshes with the second bevel gear (29). One ends of the two reciprocating lead screws (3) both extend outside the hatching pond (1) and are respectively installed with transmission wheels (30). A belt (31) is tensioned on the two transmission wheels (30).

4. The cold water fish breeding and hatching device according to claim 2, characterized in that: An installation hole is formed in the top of the mounting plate (11). A fixing bolt (12) is movably installed on the installation hole. A fixing thread groove is formed in the top of the threaded block (10). The end of the fixing bolt (12) is threadedly installed in the fixing thread groove.

5. The cold water fish breeding and hatching device according to claim 1, characterized in that: The plugging and isolating assembly includes two fixing grooves respectively formed on two sides of the hatching pond (1). The opposite inner walls of the four fixing grooves are all provided with telescopic rods (21). The ends of the two telescopic rods (21) on one side are jointly provided with a movable block (22). The side parts of the two movable blocks (22) are respectively provided with a first plugging plate (23) and a second plugging plate (24). Avoidance holes communicating with the two water discharge holes (34) are respectively formed in the mutually remote side parts of the hatching pond (1). The first plugging plate (23) and the second plugging plate (24) respectively penetrate through the two avoidance holes. Elastic units are arranged on the side parts of the two movable blocks (22). An isolating unit for moving the two movable blocks (22) respectively is arranged on the hatching pond (1).

6. The cold water fish breeding and hatching device according to claim 5, characterized in that: The elastic unit includes two springs (25) installed on the side part of the movable block (22). The other ends of the two springs (25) are respectively installed on the side inner walls of the two fixing grooves.

7. The cold water fish breeding and hatching device according to claim 5, characterized in that: The isolating unit includes two fixing blocks (15) installed on the side part of the hatching pond (1). Electric push rods (16) are installed at the bottoms of the two fixing blocks (15). Lifting blocks (17) are installed at the output ends of the two electric push rods (16). A first lifting plate (18) and a second lifting plate (19) are respectively installed on the tops of the two lifting blocks (17). Isolation holes are formed in the side parts of the first lifting plate (18) and the second lifting plate (19). Filter meshes (20) are installed on the two isolation holes. Two isolation holes are formed in the bottom of the hatching pond (1). The first lifting plate (18) and the second lifting plate (19) respectively penetrate through the two isolation holes. Extrusion elements for moving the movable block (22) are respectively arranged on the two lifting blocks (17).

8. The cold water fish breeding and hatching device according to claim 7, characterized in that: The extrusion elements include L-shaped extrusion plates (26) respectively installed on the side parts of the two lifting blocks (17). Trapezoidal blocks (27) are installed on the side parts of the two movable blocks (22).

9. The cold water fish breeding and hatching device according to claim 1, characterized in that: Two inclined plates (32) adapted to the water discharge holes (34) are installed at the bottom of the hatching pond (1). Two collection boxes (33) are arranged below the hatching pond (1).

10. A cold water fish breeding and hatching device according to claim 1, characterized in that: Four support legs (35) are installed at the bottom of the hatching pond (1). A PLC controller (36) is installed on the side part of the hatching pond (1).

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