Annular automatic control roe hatching device

Abstract

The invention relates to the field of roe incubation, in particular to an annular automatic control roe incubation device which comprises an incubation cylinder, a drainage pipe is arranged in the middle of the incubation cylinder in a penetrating mode, and an incubator is arranged in the incubation cylinder. The hatching trays are placed in the hatching barrel and used for containing to-be-hatched fish eggs, then the flexible hole plates are further arranged in the hatching trays and used for absorbing fluctuation of water in the hatching barrel, and the water in the hatching barrel can enter the hatching trays; due to the obstruction of the hatching tray and a plurality of flexible pore plates in the hatching tray, the problem that when water is injected into the hatching barrel, the fluctuation of water flow causes large disturbance to the roes is effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of fish egg hatching, and in particular to a ring-shaped automatic control fish egg hatching device. Background Art

[0002] The technology of fish egg hatching has always been an important part of aquaculture, affecting the output and economic benefits of aquaculture. Traditional methods of fish egg hatching mainly use static or flow-through hatching methods. Static hatching requires frequent manual water changes, which is cumbersome to operate. Flow-through hatching consumes a lot of water resources, and the eggs are easily damaged under the impact of strong flowing water. At the same time, traditional fish egg hatching relies on manual control of environmental factors such as temperature and dissolved oxygen. The operation is difficult and inefficient, and cannot meet the needs of modern aquaculture development for scale, automation, energy saving and high efficiency.

[0003] With the development of science and technology, technicians in related fields have also made a lot of optimizations on the technical means for hatching fish eggs. In order to make a more accurate comparison, a Chinese patent with publication number CN210746713U discloses a drifting fish egg hatching device, including a hatching bucket, a connecting hole, a water outlet pipe, a water inlet pipe, an air disc and a connecting head. When in use, the bottom water inlet is changed to the upper water inlet to avoid the injury or death of the fry caused by the excessive impact force of the bottom water body during the discharge of fry. At the same time, it also avoids the eggs or fry flowing back into the pipeline when the water is cut off, and the eggs and fry are run away. The overflow mesh is changed into an overflow pipe with holes to avoid the overflow mesh from being easily blocked. The device has a small size, light weight, convenient and flexible operation, and is more suitable for hatching small batches of scientific research fish eggs.

[0004] However, the above device still has some shortcomings in actual use:

[0005] The above device injects water into the hatching bucket by means of a water inlet pipe penetrating into the hatching bucket and then connecting two oblique pipes at the bottom of the water inlet pipe. Although it can improve the problem of fish fry being injured or killed due to the strong impact force of the bottom water body when discharging the fry, since the fish eggs to be hatched are directly placed in the hatching bucket, when water is injected into the hatching bucket through the water inlet pipe and the oblique pipe, the water in the hatching bucket will inevitably fluctuate to a large extent due to the continuous injection of water, thereby affecting the normal hatching of the fish eggs and even causing the damage of the fish eggs.

[0006] Therefore, based on the above-stated viewpoint, there is still room for improvement in the existing technical means for hatching fish eggs. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a ring-shaped automatic control fish egg hatching device, comprising a hatching tube, a drainage pipe is passed through the middle of the hatching tube, and an incubator is arranged in the hatching tube.

[0008] The incubator comprises:

[0009] A plurality of hatching trays are provided, and the hatching trays are uniformly floated in the hatching tube in the circumferential direction with the drainage pipe as the axis.

[0010] A plurality of connection frames are provided corresponding to the hatching trays and are arranged between the drain pipe and the hatching trays for limiting the connection of the hatching trays.

[0011] The water delivery pipeline is located on the incubation tube and is connected with an external water valve, and is used for delivering water to the incubation tube.

[0012] Preferably, the hatching tray is an open frame structure formed by a recessed middle portion, and a plurality of perforations are evenly formed on the hatching tray to facilitate water in the hatching tube to penetrate into the hatching tray and to facilitate hatched fry to sink into the hatching tube.

[0013] Preferably, a plurality of flexible orifice plates are limit-connected to the inner edge of the incubation tray, and the apertures on the flexible orifice plates are smaller than the apertures of the perforations on the incubation tray.

[0014] Preferably, the height of the drainage pipe is lower than that of the hatching tube, so as to drain the excess water in the hatching tube.

[0015] Preferably, a plurality of drainage holes are uniformly perforated in the circumferential direction on the upper portion of the drainage pipe, and a limiting orifice plate is connected to the upper portion of the drainage pipe.

[0016] Preferably, the connection frame comprises a connection ring sleeve which is limitedly sleeved on the drain pipe, a plurality of connection through pipes are uniformly penetrated circumferentially between the connection ring sleeve and the drain pipe, and a plurality of branch pipes penetrated on the incubation tray are connected to the same connection through pipe.

[0017] Preferably, a plurality of branch pipes on the same connecting pipe are linearly distributed on the same incubation tray, and the branch pipes are inserted on the flexible orifice plate to connect the connected incubation trays and drain pipes.

[0018] Preferably, a plurality of flexible ribbons are connected to a flexible orifice plate corresponding to a plurality of branch pipes near the middle of the drainage pipe.

[0019] Preferably, a plurality of flexible ribbons on the same incubation tray are distributed vertically on both sides of the branch pipe.

[0020] Preferably, a floating block is provided at the upper end of the limiting orifice plate, and the limiting orifice plate and the floating block are connected by a flexible belt.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The present invention places a plurality of hatching trays in an incubation tube for placing fish eggs to be hatched, and then arranges a plurality of flexible orifice plates in the incubation trays for absorbing the fluctuation of water in the incubation tube and allowing the water in the incubation tube to enter the incubation trays. When water is injected into the incubation tube, the incubation trays and the plurality of flexible orifice plates in the incubation trays hinder the incubation tube, thereby effectively reducing the problem of large disturbance to the fish eggs caused by the fluctuation of water when water is injected into the incubation tube.

[0023] Second, the present invention hinders but does not completely stop the flow of water between the hatching tube, the hatching tray and the drain pipe through the cooperation of the hatching tray and the plurality of flexible orifice plates, and also absorbs the fluctuations generated when the water flows through the flexible streamers arranged in the hatching tray. The flexible streamers reduce the influence of the water fluctuations in the hatching tube on the water environment in the hatching tray. At the same time, the flexible streamers also drive the fish eggs in the hatching tray and the hatched fry to shift during the floating process with the water, assist the fish eggs to be evenly distributed, and drive the fry to separate from the hatching tray, avoid excessive local density, and be beneficial to their growth.

[0024] 3. The present invention cooperates with the sliding water pipe, the guide water pipe, the connecting frame and the hatching tray to adjust the water injection rate in the hatching tube according to the water demand for hatching fish eggs and fry, so that the hatching tray can always float in the hatching tube, thereby improving the utilization effect of water resources and avoiding waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the hatching tube of the present invention.

[0028] Figure 3 It is a structural schematic diagram of an incubator of the present invention.

[0029] Figure 4 It is a structural schematic diagram of the connection frame of the present invention.

[0030] Figure 5 It is a structural schematic diagram of the hatching tray of the present invention.

[0031] Figure 6 The present invention Figure 5 A is an enlarged view of the middle image.

[0032] Figure 7 It is a structural schematic diagram of the drainage pipe of the present invention.

[0033] Figure 8 The present invention Figure 7 Enlarged view of B.

[0034] In the figure, 1, hatching tube; 10, drainage pipe; 100, guide water pipe; 101, sliding water pipe; 11, drainage hole; 12, limit orifice plate; 2, incubator; 20, hatching tray; 200, perforation; 21, connecting frame; 210, connecting ring sleeve; 211, connecting through pipe; 212, branch pipe; 22, water supply pipeline; 23, flexible orifice plate; 24, flexible streamer; 25, floating block; 250, flexible belt; 26, floating plate. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1 To Attachment Figure 8 Embodiments of the present invention are described in detail.

[0036] The embodiment of the present application discloses a ring-shaped automatic control fish egg hatching device, which is mainly used in the process of hatching fish eggs. In terms of technical effect, it realizes automatic control of the hatching process of fish eggs and ensures the normal hatching effect of fish eggs. In particular, during the hatching process, through the provision of a hatching tray, it realizes the effect of automatically separating the hatched fry from the hatched egg shells and dead eggs. Furthermore, the hatching device also adjusts the water injected into the hatching tube accordingly through the cooperation between the drainage pipe, the hatching tray and the water supply pipeline, thereby realizing precise control of the water level and avoiding the problem of seedling leakage caused by overflowing water.

[0037] Example 1: Reference Figure 1 and Figure 2 As shown, a ring-shaped automatic control fish egg hatching device comprises a hatching tube 1, a drain pipe 10 is penetrated in the middle of the hatching tube 1, and an incubator 2 is arranged in the hatching tube 1. When in use, water is injected into the hatching tube 1 so that the incubator 2 floats in the hatching tube 1, and then a number of fish eggs to be hatched are placed in the incubator 2, and the hatched fry are automatically separated from the hatched egg shells and dead eggs by the incubator 2, so that the hatched fry are guided to sink into the hatching tube 1, while the hatched egg shells and dead eggs are screened and retained in the incubator 2. Through the cooperation between the incubator 2 and the hatching tube 1, the disturbance of the water injected into the hatching tube 1 to the fish eggs to be hatched is avoided, and the effect of automatically screening and retaining the egg shells and dead eggs therein is achieved, which effectively avoids the problem that the staff needs to spend more time to select the egg shells and dead eggs in the hatching pool.

[0038] Reference Figure 2 and Figure 3 As shown, the incubator 2 includes:

[0039] A plurality of hatching trays 20 are provided for placing fish eggs to be hatched. The hatching trays 20 are uniformly floated in the hatching tube 1 in a circumferential direction with the drain pipe 10 as the axis.

[0040] A plurality of connection frames 21 are provided corresponding to the hatching trays 20 , and are disposed between the drain pipe 10 and the hatching tray 20 to limit the connection of the hatching tray 20 .

[0041] The water delivery pipeline 22 is located on the incubation tube 1 and is connected to an external water valve, and is used for delivering water into the incubation tube 1 .

[0042] During use, water is injected into the hatching tube 1 through the conveying pipeline to make the hatching tray 20 float in the hatching tube 1, and then a number of fish eggs to be hatched are placed in the hatching tray 20. The hatching trays 20 circumferentially arranged in the hatching tube 1 avoid the problem of the fish eggs being directly placed in the hatching tube 1 and then the injected water flow impacting the fish eggs, causing a large disturbance to the fish eggs. At the same time, the arranged hatching trays 20 also make it convenient for the staff to manage the fish eggs therein.

[0043] Further, refer to Figures 2 to 5 As shown, in order to facilitate the separation of the fry after normal hatching in the hatching tray 20 from the normal unhatched fish eggs, so as to avoid the disturbance of the normal fish eggs in the hatching tray 20 caused by the swimming of the fry after hatching, the hatching tray 20 is an open frame structure formed by a recessed middle part, and a plurality of perforations 200 are evenly formed on the hatching tray 20, so that the water in the hatching tube 1 can be immersed in the hatching tray 20, and the fry after hatching can sink into the hatching tube 1.

[0044] Reference Figures 2 to 5 As shown, the inner edge of the hatching tray 20 is limitedly connected with a plurality of flexible orifice plates 23, the aperture of the flexible orifice plates 23 is smaller than the aperture of the perforation 200 on the hatching tray 20, and the holes on the flexible orifice plates 23 are connected with the perforation 200 on the hatching tray 20 so as to make the hatching tube 1 and the hatching tray 20 connected. When in use, the water in the hatching tube 1 is connected to the hatching tray 20 through the flexible orifice plates 23 and the perforation 200 provided on the hatching tray 20, so that the fish eggs in the hatching tray 20 float in the water environment, and at the same time, because the aperture of the flexible orifice plates 23 is smaller than the aperture of the perforation 200 on the hatching tray 20, the water in the hatching tube 1 is connected with the water in the hatching tray 20, but the water fluctuation in the hatching tube 1 will not cause the water in the hatching tray 20 to have a large fluctuation.

[0045] Reference Figure 2 and Figure 3As shown, flow-type hatching usually requires continuous injection of water into the hatching tube 1 at a certain output rate, and the continuous water flow simulates the natural water flow environment, thereby promoting the hatching of fish eggs. At the same time, the flowing water can help to evenly distribute the water temperature to avoid local excessively high or low temperatures. After injecting water into the hatching tube 1 for a long time, the water level in the hatching tube 1 will continue to rise over time until it overflows. Therefore, in order to avoid the overflow of water in the hatching tube 1, the water injected into the hatching tube 1 forms a certain flow state in the hatching tube 1 to simulate the natural water flow environment. The height of the drain pipe 10 is set lower than the height of the hatching tube 1 so as to drain the excess water in the hatching tube 1. When in use, after the water level in the hatching tube 1 moves up and exceeds the height of the drain pipe 10, the water that covers the drain pipe 10 will be discharged outwardly through the drain pipe 10, so that the water level in the hatching tube 1 is always maintained at the height of the drain pipe 10. At the same time, the excess water injected into the hatching tube 1 will be discharged outwardly through the drain pipe 10, forming a flowing state between the hatching tube 1 and the drain pipe 10, so as to simulate the natural water flow environment and promote the hatching process of fish eggs and fry.

[0046] Further, refer to Figure 3 and Figure 4 As shown, when the water level in the hatching tube 1 is driven to drain over the drain pipe 10, the fry that sinks into the hatching tube 1 after hatching is likely to be discharged through the drain pipe 10 port, causing additional losses. Therefore, in order to avoid the problem that the fry are easily discharged with the water flow, a plurality of drain holes 11 are evenly penetrated in the circumferential direction of the upper part of the drain pipe 10, and the upper side of the drain pipe 10 is limitedly connected to the limiting orifice plate 12. During use, the water level in the hatching tube 1 is maintained at the height of the plurality of drain holes 11 on the drain pipe 10, and the redundant water in the hatching tube 1 is discharged through the plurality of drain holes 11 on the drain pipe 10, so that a flowing water flow is formed between the hatching tube 1, the drain hole 11 and the drain pipe 10, and simultaneously because the water level in the hatching tube 1 is maintained at the height of the drain hole 11, and the height of the drain hole 11 is lower than the height of the drain pipe 10 port, and the limiting orifice plate 12 covers the drain pipe 10 port, effectively avoiding the problem that the fry are easily discharged with the water flow.

[0047] Reference Figures 4 to 7 As shown, the connection frame 21 includes a connection ring sleeve 210 which is limitedly sleeved on the drain pipe 10, and a plurality of connection through pipes 211 are uniformly penetrated between the connection ring sleeve 210 and the drain pipe 10 in the circumferential direction, and the same connection through pipe 211 is connected with a plurality of branch pipes 212 which are penetrated on the hatching tray 20. When in use, the water in the connected hatching tray 20 is guided by the connection through pipe 211 and the connected branch pipes 212, so that the water in the hatching tray 20 is introduced into the drain pipe 10 through the connection through pipes and the branch pipes 212, and a flowing water environment is formed, simulating a natural water flow environment, so as to hatch the normal fish eggs in the hatching tray 20.

[0048] Reference Figures 4 to 7 As shown, a plurality of branch pipes 212 on the same connecting pipe 211 are linearly distributed on the same hatching tray 20, and the branch pipes 212 are inserted on the flexible orifice plate 23 to connect the connected hatching tray 20 and the drain pipe 10. When in use, the flow rate of water between the hatching tray 20 and the connected connecting pipe 211 is increased by the branch pipes 212 linearly inserted on the hatching tray 20 and the flexible orifice plate 23.

[0049] Reference Figures 4 to 7 As shown, a plurality of flexible streamers 24 are connected to the corresponding plurality of branch pipes 212 on one of the flexible orifice plates 23 near the middle drain pipe 10. When in use, the plurality of flexible streamers 24 in the hatching tray 20 are driven to float with the water flow through the water flow between the hatching tray 20 and the connected branch pipes 212 and the connecting through pipe 211, and the fluctuation of the water in the hatching tube 1 is reduced by the plurality of flexible streamers 24 floating in the hatching tray 20 on the water environment in the hatching tray 20. At the same time, the floating flexible streamers 24 can also disturb the plurality of fry floating in the hatching tray 20 after hatching, so as to drive the fry to leave the hatching tray 20 and sink into the hatching tube 1. The fry can be more evenly distributed in the hatching tube 1 by the disturbance of the floating flexible streamers 24 to avoid excessive local density.

[0050] Reference Figures 4 to 7 As shown, a plurality of flexible ribbons 24 on the same incubation tray 20 are distributed vertically on both sides of the branch pipe 212 .

[0051] Reference Figures 4 to 8 As shown, a floating block 25 is provided at the upper end of the limiting orifice plate 12 , and the limiting orifice plate 12 and the floating block 25 are connected by a flexible belt 250 .

[0052] During use, after the water level in the incubation tube 1 exceeds the height of the drain pipe 10, the floating block 25 floats to the water surface under the action of the rising buoyancy of the water in the incubation tube 1 and drives the flexible belt 250 connected thereto to be stretched. At this time, since the water level in the incubation tube 1 exceeds the drain pipe 10 and the plurality of drain holes 11 thereon, the water in the incubation tube 1 located on the upper side of the drain pipe 10 will enter the drain pipe 10 through the plurality of drain holes 11 of the drain pipe 10 and the limiting orifice plate 12, and then be discharged. Due to the flow of water between the incubation tube 1 and the drain pipe 10, the water in the incubation tube 1 is shaped like a A small vortex is formed, which drives the several hatching trays 20 suspended in the hatching tube 1, the connecting pipe 211, the branch pipe 212 and the floating blocks 25 floating on the water surface to rotate circumferentially with the drain pipe 10 as the axis, thereby realizing the effect of simulating the flow of natural water. At the same time, since the floating blocks 25 float on the water surface and rotate circumferentially with the water body, and the limiting orifice plate 12 is limitedly connected to the drain pipe 10, the floating blocks 25 continuously drive the flexible belt 250 to shift on the upper side of the drain pipe 10 during the floating process, thereby achieving the effect of driving away the fry floating near the drain pipe 10.

[0053] Example 2: Reference Figure 7 and Figure 8 As shown, on the basis of Example 1, in order to improve the utilization effect of the water injected into the hatching tube 1 and reduce the waste of water resources during the process of hatching fish eggs; specifically, the drain pipe 10 includes a guide water pipe 100 passed through the hatching tube 1 and a sliding water pipe 101 slidably sleeved on the guide water pipe 100, the drainage hole 11 is opened on the sliding water pipe 101, the connecting through pipe 211 and the connecting ring sleeve 210 are limitedly connected to the sliding water pipe 101, and the connecting ring sleeve 210 and all the connecting through pipes 211 are commonly connected with a floating plate 26 rotatably sleeved on the sliding water pipe 101.

[0054] During use, in the initial stage, when the hatching tube 1 and the plurality of hatching trays 20 are filled with fish eggs, since the fish eggs do not require much water in the hatching tube 1, it is only necessary to inject a certain amount of water into the hatching tube 1 so that the water level in the hatching tube 1 exceeds the plurality of drainage holes 11 on the sliding water pipe 101, and then drain the water.

[0055] After some of the fish eggs in the hatching tray 20 are hatched and enter the hatching tube 1, the rate of injecting water into the hatching tube 1 is increased, so that the water level in the hatching tube 1 moves up a part. At this time, the upward movement of the water level in the hatching tube 1 drives the floating plate 26 to move up, and the upward movement of the floating plate 26 drives the sliding water pipe 101, the connecting ring sleeve 210, a plurality of connecting through pipes 211, the branch pipe 212 and the hatching tray 20 to move up synchronously, so that the water between the hatching tube 1 and the drainage hole 11 and the hatching tray 20 and the drainage hole 11 can still keep flowing, so as to simulate the natural water flow environment.

[0056] Generally, the demands of fish eggs and fry for the amount of water in the hatching tube 1 are different. Fish eggs usually require a shallower and more stable water level, while fry require a larger activity space as their density increases. Therefore, a larger amount of water is required in the hatching tube 1. The higher water level in the hatching tube 1 can provide a larger activity space for the fry and support their rapid growth and development. Therefore, as an optional implementation, a detection instrument can be installed in the hatching tube 1 to detect the density of the fry after hatching in the hatching tube 1 (that is, the number of the fry after hatching). Then, the rate at which water is injected into the hatching tube 1 by the water delivery pipeline 22 is controlled by the fry density detected by the detection instrument, so that the water level in the hatching tube 1 is more adapted to the growth of the fry in the hatching tube 1, thereby achieving effective utilization of water resources according to the progress of fish egg hatching and reducing waste of water resources.

[0057] During operation: Step 1: inject a proper amount of water into the hatching tube 1 to make the hatching tray 20 float, place the fish eggs in the hatching tray 20, and use the perforations 200 and the flexible orifice plate 23 on the hatching tray 20 to realize the flow circulation of water in each hatching tray 20, while avoiding the disturbance of the fish eggs by water flow fluctuations.

[0058] Step 2: Continue to inject water and control the rate at which water is injected into the hatching tube 1, maintain a stable water level through the drain pipe 10 and the drain hole 11, and simulate the natural water flow environment to promote the egg hatching process

[0059] Step 3: After the fish eggs are hatched, the fry sinks into the hatching tube 1 through the perforations 200 on the hatching tray 20. The water flowing in the hatching tray 20 drives the flexible ribbons 24 in the hatching tray 20 to float with the water. The floating of the flexible ribbons 24 assists the fry and the eggs to be evenly distributed. According to the hatching progress, the water injection rate and the water level are adjusted to provide a larger activity space for the fry.

[0060] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0061] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A circular automatic control fish egg hatching device, comprising a hatching tube (1), characterized in that: A drainage pipe (10) is provided in the middle of the incubation tube (1), and an incubator (2) is provided in the incubation tube (1), wherein: The incubator (2) comprises: A plurality of hatching trays (20) are provided, and the plurality of hatching trays (20) are uniformly floated in the hatching tube (1) in the circumferential direction with the drainage pipe (10) as the axis; A connecting frame (21), a plurality of which are provided corresponding to the hatching trays (20), and are arranged between the drain pipe (10) and the hatching tray (20) to limit the connection of the hatching tray (20); The water delivery pipeline (22) is located on the incubation tube (1) and is connected to an external water valve, and is used to deliver water into the incubation tube (1).

2. The annular automatic control fish egg hatching device according to claim 1, characterized in that: The hatching tray (20) is an open frame structure formed by an inward depression in the middle, and a plurality of perforations (200) are evenly formed on the hatching tray (20), so as to facilitate water in the hatching tube (1) to penetrate into the hatching tray (20) and facilitate hatched fry to sink into the hatching tube (1).

3. The annular automatic control fish egg hatching device according to claim 1, characterized in that: The inner edge of the incubation tray (20) is limitedly connected to a plurality of flexible orifice plates (23), and the aperture of the flexible orifice plates (23) is smaller than the aperture of the perforations (200) on the incubation tray (20).

4. The annular automatic control fish egg hatching device according to claim 1, characterized in that: The height of the drainage pipe (10) is lower than that of the hatching tube (1) so as to drain away the excess water in the hatching tube (1).

5. The annular automatic control fish egg hatching device according to claim 1, characterized in that: The upper part of the drainage pipe (10) is evenly perforated with a plurality of drainage holes (11) in the circumferential direction, and the upper part of the drainage pipe (10) is limitedly connected to a limiting orifice plate (12).

6. The annular automatic control fish egg hatching device according to claim 1, characterized in that: The connecting frame (21) comprises a connecting ring (210) which is limitedly sleeved on the drain pipe (10); a plurality of connecting through pipes (211) are uniformly passed through the connecting ring (210) and the drain pipe (10) in a circumferential direction; and a plurality of branch pipes (212) passed through the incubation tray (20) are connected to the same connecting through pipe (211).

7. The annular automatic control fish egg hatching device according to claim 6, characterized in that: A plurality of branch pipes (212) on the same connecting pipe (211) are linearly distributed on the same hatching tray (20), and the branch pipes (212) are inserted into the flexible orifice plate (23) to connect the connected hatching tray (20) and the drainage pipe (10).

8. The annular automatic control fish egg hatching device according to claim 6, characterized in that: A plurality of flexible streamers (24) are connected to one of the flexible orifice plates (23) close to the middle portion of the drainage pipe (10) corresponding to the plurality of branch pipes (212).

9. The annular automatic control fish egg hatching device according to claim 6, characterized in that: A plurality of flexible streamers (24) on the same incubation tray (20) are distributed vertically on both sides of the branch pipe (212).

10. The annular automatic control fish egg hatching device according to claim 5, characterized in that: A floating block (25) is provided at the upper end of the limiting orifice plate (12), and the limiting orifice plate (12) and the floating block (25) are connected via a flexible belt (250).

Images