Incubator capable of increasing hatchability of fish eggs of perch

Abstract

The invention relates to the technical field of roe incubation, and particularly discloses an incubator for improving the hatchability of shuttle perch roes, which comprises a cylindrical shell, a water outlet is formed in the middle of the top side of the shell, a plurality of water outlet nozzles are mounted on the edge of the bottom side of an inner cavity of the shell, and a conical shell with an upward tip is fixed in the middle of the bottom side of the inner cavity of the shell. A vertically-arranged circular pipe body is installed above the conical shell, a plurality of partition plates are fixed to the inner wall of the pipe body, the tip end of the conical shell stretches into the pipe body, and the gap between the conical shell and the pipe body is 1.0-10.0 cm. Shuttleperch eggs in the incubator move up and down in water and do not make contact with a filter screen, and therefore the hatchers can be hatched conveniently. Mechanical extrusion of the shuttleperch eggs is avoided, and the hatching rate of the shuttleperch eggs is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of fish egg hatching, and specifically provides an incubator for improving the hatching rate of zander eggs. Background Art

[0002] Zander is an important economic fish of the Percidae family. It is native to central Europe and is distributed in the rivers and lakes of the Aral Sea, Black Sea, Caspian Sea in Europe and the Baltic Sea water system. It has the advantages of fast growth, low bait rate, delicious meat, no intermuscular spines, and a protein content higher than that of ordinary fish.

[0003] The hatching raceway is a widely used fish hatching facility. The hatching raceway includes a pool body, a filter net, a water spraying device, and a drain pipe. The hatching raceway supports high-density fish egg hatching and is suitable for large-scale production. However, during the process of using the hatching raceway to hatch zander eggs, the zander eggs are easily blocked on the filter net of the hatching raceway, causing mechanical damage to the fish eggs and affecting the hatching rate of zander eggs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide an incubator for improving the hatching rate of zander eggs. The zander eggs move up and down in water, and the zander eggs do not contact the filter net, avoiding mechanical extrusion of the zander eggs and improving the hatching rate of zander eggs.

[0005] To achieve the above object, the present invention provides the following technical solution: An incubator for improving the hatching rate of zander eggs, including a cylindrical housing. A drain port is provided in the middle of the top side of the housing. A plurality of water outlet nozzles are installed on the edge of the bottom side of the inner cavity of the housing. A conical housing with a pointed end upward is fixed in the middle of the bottom side of the inner cavity of the housing. A circular tube body vertically arranged is installed above the conical housing. A plurality of partitions are fixed on the inner wall of the tube body. The pointed end of the conical housing extends into the tube body, and the gap between the conical housing and the tube body is 1.0 - 10.0 cm.

[0006] Among them, water is injected into the housing, and after the external zander eggs are de-sticked, they are put into the housing. An external water pump conveys water to the water outlet nozzles, and the water sprayed out by the water outlet nozzles drives the water between the inner wall of the housing and the outer side of the tube body to rotate.

[0007] As a preferred technical solution of the present invention, it further includes an oxygenation device and an annular water-permeable cloth located inside the housing. The top end and the bottom end of the annular water-permeable cloth are respectively fixedly connected to the inner wall of the housing. The tube body is located inside the annular water-permeable cloth, and a water storage cavity is formed between the outer side of the annular water-permeable cloth and the inner wall of the housing.

[0008] The oxygenation device includes a housing. In the middle of the inner cavity of the housing, several liquid film forming members are fixed. A first mounting hole communicating the inside and outside is opened on the top side of the housing. A nozzle is installed at the bottom end of the first mounting hole, and a first valve is installed at the top end of the first mounting hole. A second mounting hole communicating the inside and outside is opened on the bottom side of the housing. The bottom end of the second mounting hole communicates with one end of a connecting pipe, and the other end of the connecting pipe communicates with the bottom of the water containing cavity or the bottom of the inner cavity of the housing.

[0009] Among them, the air pressure inside the housing is 150.0 kPa - 300.0 kPa, and an external water pump supplies water to the first valve.

[0010] As a preferred technical solution of the present invention, the liquid film forming member is an annular member, a sphere or a mesh plate.

[0011] As a preferred technical solution of the present invention, a pressure control valve is installed on the connecting pipe.

[0012] As a preferred technical solution of the present invention, a fourth mounting hole communicating with the upper part of the water containing cavity is opened on the outer side of the housing, and an automatic exhaust valve is installed on the fourth mounting hole.

[0013] As a preferred technical solution of the present invention, a third mounting hole is opened on the top side of the housing, and a second valve is installed on the third mounting hole.

[0014] As a preferred technical solution of the present invention, it further includes an annular water permeable cloth located inside the housing. The top end and the bottom end of the annular water permeable cloth are respectively fixedly connected to the inner wall of the housing. The pipe body is located inside the annular water permeable cloth, and a closed water containing cavity is formed between the annular water permeable cloth and the housing.

[0015] Among them, an external water pump conveys water to the water containing cavity.

[0016] As a preferred technical solution of the present invention, a fourth mounting hole communicating with the upper part of the water containing cavity is opened on the outer side of the housing, and an automatic exhaust valve is installed on the fourth mounting hole.

[0017] As a preferred technical solution of the present invention, the housing is made of a transparent material.

[0018] As a preferred technical solution of the present invention, it further includes a water guide pipe. An extension pipe extends upward from the drain outlet, and openings are provided on the outer side of the extension pipe. The openings communicate with one end of the water guide pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. The incubator for improving the hatching rate of perch eggs in the examples of the present invention, on the one hand, the water between the inner wall of the housing and the outer side of the pipe body drives the perch eggs to move spirally upward. After the height of the perch eggs is higher than the top end of the pipe body, the perch eggs move spirally with the water towards the drain opening. The centrifugal force received by the perch eggs prevents the perch eggs from passing through the drain opening, and the perch eggs fall downward into the pipe body. The perch eggs in the pipe body move downward and pass through the gap between the conical housing and the pipe body. This incubator enables the perch eggs to circulate and move inside and outside the pipe body, avoiding mechanical extrusion of the perch eggs and improving the hatching rate of the perch eggs. On the other hand, during the hatching process of the perch eggs, the oxygenation device and the annular water-permeable cloth cooperate to generate a water flow passing through the annular water-permeable cloth, avoiding friction or collision between the perch eggs and the inner wall of the housing during the spiral movement of the perch eggs, preventing mechanical damage to the perch eggs, and increasing the oxygen content in the water inside the pipe body. On the further hand, after the perch eggs hatch into fry, the oxygenation device causes bubbles to precipitate in the water inside the housing. The bubbles adhere to the egg membrane, and the buoyancy of the egg membrane with adhered bubbles becomes larger. The egg membrane with adhered bubbles moves spirally with the water towards the drain opening and is discharged through the drain opening, facilitating the separation of the perch fry and the egg membrane and avoiding mildew of the egg membrane from affecting the growth of the perch fry.

[0020] 2. In the incubator for improving the hatching rate of perch eggs in the examples of the present invention, the water between the inner wall of the housing and the outer side of the pipe body drives the perch eggs to move spirally upward, avoiding the accumulation of perch eggs and reducing the death of perch eggs caused by oxygen deficiency.

[0021] 3. In the incubator for improving the hatching rate of perch eggs in the examples of the present invention, an extension pipe extends upward from the drain opening, and openings are provided on the outer side of the extension pipe. One end of the openings is communicated with a water guide pipe, facilitating the water flowing out of the drain opening to flow into an external sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of one perspective of the present invention; Figure 2 is Figure 1 a partial cross-sectional structural diagram of Figure 3 is a schematic structural diagram of one working state of the present invention; Figure 4 is a schematic structural diagram of another working state of the present invention; Figure 5 is a partial cross-sectional structural diagram of the oxygenation device of the present invention.

[0023] In the figure: 1 housing, 2 drain opening, 3 oxygenation device, 301 nozzle, 302 first valve, 303 second valve, 304 liquid film forming member, 305 outer shell, 4 annular water-permeable cloth, 5 pipe body, 6 partition board, 7 conical housing, 8 water outlet nozzle, 9 connecting pipe, 10 automatic exhaust valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] Embodiment 1: Please refer to Figures 1-4 , this embodiment discloses an incubator for improving the hatching rate of zander eggs, including a cylindrical housing 1. A drain port 2 is provided in the middle of the top side of the housing 1. A plurality of water outlet nozzles 8 are equiangularly installed on the edge of the bottom side of the inner cavity of the housing 1. A conical housing 7 with a pointed end upward is fixed in the middle of the bottom side of the inner cavity of the housing 1. A circular tube 5 is vertically installed above the conical housing 7. A plurality of vertically arranged partition plates 6 are fixed on the inner wall of the tube 5. The pointed end of the conical housing 7 extends into the tube 5, and the gap between the conical housing 7 and the tube 5 is 1.0 - 10.0 cm.

[0026] Furthermore, in the prior art, common talcum powder, mud or protease is used to remove stickiness from zander eggs. Zander eggs are sinking eggs, and the density of zander eggs is greater than that of water.

[0027] The working process and principle of this embodiment are as follows: The staff injects water into the housing 1. After the staff removes the stickiness from the zander eggs, they are put into the housing 1. The staff makes an external water pump convey water to the water outlet nozzles 8, and the water sprayed out by the water outlet nozzles 8 drives the water between the inner wall of the housing 1 and the outer side of the tube 5 to rotate.

[0028] The water between the inner wall of the housing 1 and the outer side of the tube 5 drives the zander eggs to move upward in a spiral manner. After the height of the zander eggs is higher than the top end of the tube 5, the zander eggs move towards the drain port 2 in a spiral manner with the water. The centrifugal force received by the zander eggs prevents the zander eggs from passing through the drain port 2, and the zander eggs fall downward into the tube 5. The zander eggs in the tube 5 move downward and pass through the gap between the conical housing 7 and the tube 5. This incubator enables the zander eggs to circulate and move inside and outside the tube 5, avoiding mechanical extrusion of the zander eggs and improving the hatching rate of zander eggs.

[0029] Furthermore, the water sprayed out by the water outlet nozzles 8 drives the water between the inner wall of the housing 1 and the outer side of the tube 5 to rotate, and the water outside the gap between the conical housing 7 and the tube 5 flows, causing the hydraulic pressure of the water outside the gap between the conical housing 7 and the tube 5 to decrease. The water in the tube 5 flows downward and passes through the gap between the conical housing 7 and the tube 5.

[0030] The partition plates 6 in the tube 5 prevent the water in the tube 5 from rotating, and the conical housing 7 makes the zander eggs in the tube 5 move towards the gap between the conical housing 7 and the tube 5.

[0031] Furthermore, the housing 1 is made of a transparent material, facilitating the staff to observe the hatching situation of the zander eggs.

[0032] Embodiment 2: As Figures 1-5 shown, this embodiment discloses an incubator for improving the hatching rate of zander eggs, whose structure is substantially the same as that of Embodiment 1. The difference is that this embodiment further includes an aeration device 3 and an annular water-permeable cloth 4 located inside the housing 1. The top and bottom ends of the annular water-permeable cloth 4 are respectively fixedly connected to the inner wall of the housing 1. The pipe body 5 is located inside the annular water-permeable cloth 4, and a water-containing cavity is formed between the outer side of the annular water-permeable cloth 4 and the inner wall of the housing 1.

[0033] The aeration device 3 includes a housing 305. In the middle of the inner cavity of the housing 305, a number of liquid film forming parts 304 are fixed. A first installation hole communicating the inside and outside is opened on the top side of the housing 305. A nozzle 301 is installed at the bottom end of the first installation hole, and a first valve 302 is installed at the top end of the first installation hole. A second installation hole communicating the inside and outside is opened on the bottom side of the housing 305. The bottom end of the second installation hole is communicated with one end of a connecting pipe 9, and the other end of the connecting pipe 9 is communicated with the bottom of the water-containing cavity or the bottom of the inner cavity of the housing 1.

[0034] Among them, the air pressure inside the housing 305 is 150.0 kPa - 300.0 kPa, and an external water pump supplies water to the first valve 302.

[0035] The working process and principle of this embodiment are as follows: During the hatching process of the zander eggs: The staff makes one end of the connecting pipe 9 communicate with the bottom of the water-containing cavity. The staff fills air into the housing 305 through an air pump or a syringe, so that the air pressure inside the housing 305 is 150.0 kPa - 300.0 kPa. The staff makes an external water pump supply water to the first valve 302. The water is sprayed on the liquid film forming parts 304 through the first valve 302 and the nozzle 301. The liquid film forming parts 304 form a liquid film with the water, increasing the air dissolved in the water. Then the water inside the housing 305 enters the water-containing cavity through the connecting pipe 9. After the water inside the housing 305 enters the water-containing cavity, the hydraulic pressure becomes smaller, and the air in the water precipitates to form bubbles with a diameter of 30 μm - 100 μm. The water in the water-containing cavity passes through the annular water-permeable cloth 4, forming a water flow passing through the annular water-permeable cloth 4. The water flow passing through the annular water-permeable cloth 4 prevents the zander eggs from rubbing or colliding with the inner wall of the housing 1 during the spiral movement, avoiding mechanical damage to the zander eggs and increasing the oxygen content of the water in the pipe body 5.

[0036] After the eggs of the zander hatch into fry: The staff connect one end of the connecting pipe 9 to the bottom of the inner cavity of the housing 1. The water pressure in the outer shell 305 decreases after the water enters the water-containing cavity, and the air in the water precipitates to form bubbles with diameters ranging from 30 μm to 100 μm. The bubbles adhere to the egg membrane, and the buoyancy of the egg membrane with adhered bubbles increases. The egg membrane with adhered bubbles moves spirally with the water towards the drain port 2 and is discharged through the drain port 2, facilitating the separation of the zander fry and the egg membrane and avoiding the mildew of the egg membrane from affecting the growth of the zander fry.

[0037] After the zander fry adhere to bubbles, the zander fry swim to make the bubbles adhered to their bodies break away.

[0038] Further, the liquid film forming member 304 is an annular member, a sphere or a mesh plate.

[0039] Further, a fourth mounting hole communicating with the upper part of the water-containing cavity is provided on the outer side of the housing 1, and an automatic exhaust valve 10 is installed on the fourth mounting hole, which facilitates the discharge of the air in the water-containing cavity.

[0040] Further, a pressure control valve is installed on the connecting pipe 9. When the pressure difference between the two ports of the pressure control valve is greater than the set value, the pressure control valve is turned on; when the pressure between the two ports of the pressure control valve is less than the set value, the pressure control valve is closed. The pressure control valve prevents the air in the outer shell 305 from entering the housing 1.

[0041] Further, a third mounting hole is provided on the top side of the outer shell 305, and a second valve 303 is installed on the third mounting hole, which facilitates the staff to fill the outer shell 305 with air.

[0042] Embodiment Three: As Figure 2 shown, this embodiment discloses an incubator for improving the hatching rate of zander eggs. Its structure is substantially the same as that of Embodiment One. The difference is that this embodiment further includes an annular water-permeable cloth 4 located inside the housing 1. The top and bottom ends of the annular water-permeable cloth 4 are respectively fixedly connected to the inner wall of the housing 1. The pipe body 5 is located inside the annular water-permeable cloth 4, and a closed water-containing cavity is formed between the annular water-permeable cloth 4 and the housing 1.

[0043] Among them, an external water pump conveys water to the water-containing cavity.

[0044] The working process and principle of this embodiment are as follows: During the hatching process of the zander eggs: The staff make an external water pump convey water to the water-containing cavity. The water in the water-containing cavity passes through the annular water-permeable cloth 4 to form a water flow passing through the annular water-permeable cloth 4. The water flow passing through the annular water-permeable cloth 4 prevents the zander eggs from rubbing or colliding with the inner wall of the housing 1 during the spiral movement, avoiding mechanical damage to the zander eggs.

[0045] Further, a fourth mounting hole communicating with the upper part of the water storage cavity is formed on the outer side of the housing 1, and an automatic exhaust valve 10 is installed on the fourth mounting hole, which facilitates the discharge of air in the water storage cavity.

[0046] Embodiment 4: As Figure 1 and Figure 2 shown, this embodiment discloses an incubator for improving the hatching rate of perch eggs. Its structure is substantially the same as that of Embodiment 1. The difference is that this embodiment further includes a water guide pipe. An extension pipe extends upward from the drain port 2, and an opening is formed on the outer side of the extension pipe. The opening communicates with one end of the water guide pipe, facilitating the water flowing out of the drain port 2 to flow into an external sedimentation tank.

[0047] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An incubator for improving the hatching rate of pike perch eggs, characterized in that: It comprises a cylindrical shell (1), a drainage port (2) is provided in the middle of the top side of the shell (1), a plurality of water outlets (8) are installed on the edge of the bottom side of the inner cavity of the shell (1), a conical shell (7) with the tip facing upward is fixed in the middle of the bottom side of the inner cavity of the shell (1), a vertically arranged circular tube (5) is installed above the conical shell (7), a plurality of partitions (6) are fixed on the inner wall of the tube (5), the tip of the conical shell (7) extends into the tube (5), and the gap between the conical shell (7) and the tube (5) is 1.0-10.0 cm; Water is injected into the shell (1), and the pike perch eggs on the outside are removed and placed into the shell (1). An external water pump delivers water to the water outlet (8), and the water sprayed from the water outlet (8) drives the water between the inner wall of the shell (1) and the outer side of the tube (5) to rotate.

2. The incubator for improving the hatching rate of pike perch eggs according to claim 1, characterized in that: It also includes an oxygenation device (3) and an annular water-permeable cloth (4) located inside the shell (1), the top and bottom ends of the annular water-permeable cloth (4) being fixedly connected to the inner wall of the shell (1), the tube body (5) being located inside the annular water-permeable cloth (4), and a water-containing cavity being formed between the outer side of the annular water-permeable cloth (4) and the inner wall of the shell (1); The oxygenation device (3) comprises a shell (305), a plurality of liquid film forming parts (304) are fixed in the middle of the inner cavity of the shell (305), a first mounting hole communicating with the inside and outside of the shell (305) is provided on the top side of the shell (305), a nozzle (301) is installed at the bottom end of the first mounting hole, a first valve (302) is installed at the top end of the first mounting hole, a second mounting hole communicating with the inside and outside of the shell (305) is provided on the bottom side of the shell (305), the bottom end of the second mounting hole is communicated with one end of a connecting pipe (9), and the other end of the connecting pipe (9) is communicated with the bottom of the water containing cavity or the bottom of the inner cavity of the shell (1); The air pressure in the housing (305) is 150.0 kPa-300.0 kPa, and an external water pump supplies water to the first valve (302).

3. The incubator for improving the hatching rate of pike perch eggs according to claim 2, characterized in that: The liquid film forming part (304) is a ring, a sphere or a mesh plate.

4. The incubator for improving the hatching rate of pike perch eggs according to claim 2, characterized in that: A pressure control valve is installed on the connecting pipe (9).

5. The incubator for improving the hatching rate of pike perch eggs according to claim 2, characterized in that: A fourth mounting hole communicating with the upper portion of the water containing chamber is provided on the outer side of the housing (1), and an automatic exhaust valve (10) is mounted on the fourth mounting hole.

6. The incubator for improving the hatching rate of pike perch eggs according to claim 1, characterized in that: A third mounting hole is provided on the top side of the housing (305), and a second valve (303) is mounted on the third mounting hole.

7. The incubator for improving the hatching rate of pike perch eggs according to claim 1, characterized in that: It also includes an annular water-permeable cloth (4) located inside the shell (1), the top and bottom ends of the annular water-permeable cloth (4) being fixedly connected to the inner wall of the shell (1), respectively, the tube body (5) being located inside the annular water-permeable cloth (4), and a closed water-containing cavity being formed between the annular water-permeable cloth (4) and the shell (1); Wherein, an external water pump delivers water to the water containing chamber.

8. The incubator for improving the hatching rate of pike perch eggs according to claim 7, characterized in that: A fourth mounting hole communicating with the upper portion of the water containing chamber is provided on the outer side of the housing (1), and an automatic exhaust valve (10) is mounted on the second mounting hole.

9. The incubator for improving the hatching rate of pike perch eggs according to claim 1, characterized in that: The shell (1) is made of transparent material.

10. The incubator for improving the hatching rate of pike perch eggs according to claim 1, characterized in that: It also comprises a water pipe, wherein the drainage port (2) is extended upwardly by an extension pipe, an opening is provided on the outer side of the extension pipe, and the opening is connected to one end of the water pipe.

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