JP3739960B2 - Hatching tank and aquatic animal breeding tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hatching tank and an aquatic animal breeding tank.
[0002]
[Prior art]
A small aquatic animal called brine shrimp is sometimes used as a live bait for ornamental aquatic animals (such as various ornamental fish) because of its high nutritional value. Brine shrimp are often sold in dry eggs. The eggs are put into a hatching tank containing seawater or salt water almost similar to seawater, and the eggs in the water will hatch if they are kept stirring, so they are scooped and placed in the aquarium where aquatic animals are raised. Give animals as live food. As an egg stirring method, air is supplied from the bottom of the hatching tank, and a stirring action is obtained by circulating water flow or turbulent flow generated by the upward flow generated when bubbles generated by this air supply rise in the hatching tank. It has been known. In addition, in order to facilitate feeding work, a method is known in which a hatching tank is attached to a corner of the inside of the water tank, a brine shrimp hatched in the hatching tank is scooped with a net or the like, and is directly put into a breeding water tank. .
[0003]
However, if the brine shrimp continues to hatch in the hatching tank, the salt water will become dirty and decay after a few days due to the decay of proteins and unhatched eggs contained in the egg. More eggshells are left. For this reason, it is necessary to periodically change the salt water in the hatching tank and clean the hatching tank.
[0004]
[Problems to be solved by the invention]
By the way, it is conceivable that the hatching tank is provided with an opening that opens into the breeding aquarium, so that the hatched brine shrimp itself comes out of the hatching tank and comes out into the tank. However, seawater or saltwater is contained in the hatching tank, while freshwater fish are kept in the aquarium because freshwater is contained in the tank. As a result, the concentration of salt water in the hatching tank decreases.
[0005]
Therefore, the present invention is to solve the above problems, and the problem is that seawater or salt water and fresh water are not mixed, and the sea water or salt water storage area is communicated with the fresh water storage area. Provided with a hatching tank and aquatic animal breeding tank through which hatched aquatic animals can pass, and further, a fluid boundary zone communication portion that can be suitably used for such various hatching tanks and aquatic animal breeding tanks To provide a structure.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the fluid boundary region communication portion structure showing the basic inventive concept of the present invention includes a first storage region that stores the first fluid and a second fluid that has a higher specific gravity than the first fluid. A second storage area, and a first opening that is open to the first storage area between the first storage area and the second storage area, and the second storage area. A boundary chamber having an open second opening is provided, and the first storage area and the second storage area communicate with each other through the boundary chamber, and the first opening is the second opening. It is characterized by being formed above.
[0007]
According to this basic inventive concept, the specific gravity of the second fluid is greater than that of the first fluid, so that the boundary chamber provided between the first main region and the second storage region is formed upward. Since the first fluid flowing in from the first opening gathers upward and the second fluid flowing in from the second opening formed below gathers downward, they are arranged in layers above and below the boundary surface, respectively. The contact surface between the first fluid and the second fluid is only the boundary surface formed in the boundary chamber. Accordingly, since the boundary surface between the first fluid and the second fluid is limited in the boundary chamber configured separately from the first storage region and the second storage region, mixing of the first fluid and the second fluid is suppressed. . Therefore, it can restrict | limit that a 1st fluid and a 2nd fluid intermingle, making a 1st storage area and a 2nd storage area communicate.
[0008]
In the basic concept of the invention, it is preferable that the vicinity of at least one of the first opening and the second opening in the boundary chamber is formed in a tubular shape with a narrowed cross section. According to this invention, by forming the vicinity of the first opening or the second opening into a tubular shape with a narrowed cross section, convection to the first fluid in the first containing area or the second fluid in the second containing area, Even if a turbulent flow or other flow occurs, the influence of the flow can be made difficult to be exerted in the boundary chamber by the portion formed in a tubular shape with a narrowed cross section, so that the boundary surface in the boundary chamber is less likely to be shaken. The mixing action of the first fluid and the second fluid can be reduced.
[0009]
In the basic inventive concept, the boundary chamber is preferably formed in a tubular shape as a whole. According to the present invention, the boundary chamber can be easily configured by forming the boundary chamber in a tubular shape as a whole, and the required space can be reduced because the boundary chamber can be configured compactly.
[0010]
In the above basic invention concept, the term “tubular” refers to a shape having a flow path length longer than that of the internal flow path, and the flow cross-sectional shape is not limited to a circle but is arbitrary. In this case, the above effect can be further enhanced by bending (refracting) the tubular portion. In all the inventions of the present application, the effect can also be improved by bending (refracting) the boundary chamber situation.
[0011]
In each of the above basic inventive concepts, the first fluid is preferably fresh water and the second fluid is preferably salt water. In each of the above inventions, it is particularly effective to configure as a communication part structure in the boundary region between fresh water and salt water (or sea water). This communication part structure is not limited to hatching tanks and aquatic animal breeding tanks, which will be described later, but can also be used for estuary fishways, water level adjustment structures, and the like. Furthermore, it is preferable to provide a deterrent plate in the vicinity of the enlarged cross section for blocking the water flow rising from the lower opening into the boundary chamber.
[0012]
Next, the hatching tank of the present invention uses aquatic animal eggs. In salt water hatching Let A hatching chamber for communicating with the hatching chamber via a lower opening, the boundary chamber being located above the lower opening and from the upper end of the hatching chamber Also down Open outside An upper opening is provided.
[0013]
According to this invention, by arranging the hatching tank containing salt water in fresh water such as in the water tank, a boundary surface of salt water and fresh water is formed in the boundary chamber so that the salt water and fresh water are not mixed. Can do. In this case, the aquatic animal can be hatched in a hatching chamber containing salt water, and the hatched aquatic animal passes through the lower opening and enters the boundary chamber, and further passes through the upper opening and passes through the fresh water. Can be configured to be able to exit.
[0014]
In this invention, it is preferable that the boundary chamber is extended upward along the outer surface of the hatching chamber from the lower opening. According to this invention, since the boundary chamber is formed to extend upward along the outer surface of the hatching chamber from the lower opening, the hatching tank can be configured compactly.
[0015]
In each of the above inventions, it is preferable that a gas supply port is provided at a lower portion of the hatching chamber. By providing a gas supply port in the lower part of the hatching chamber and supplying gas from the gas supply port, a water flow can be generated in the hatching chamber, and fresh salt water can be kept in constant contact with the eggs, so that the hatching rate Can be increased.
[0016]
In the present invention, The boundary chamber includes an enlarged cross-sectional portion having an increased horizontal cross-sectional area between the lower opening and the upper opening. The According to this, The flow of the egg mixed into the boundary chamber through the lower opening by the water flow generated by the gas supply can be relaxed in the enlarged cross section, so that the egg that has entered the boundary chamber can be returned to the hatching chamber again. . Here, the enlarged cross-sectional portion is formed below the intermediate height between the lower opening and the upper opening, which shakes the boundary surface of salt water and fresh water formed in the boundary chamber. It is preferable in terms of difficulty. Further, the boundary chamber is an inner wall inclined downward toward the lower opening in the vicinity of the lower opening.
It is preferable to have a surface shape in that it is easy to return an egg that has once entered the boundary chamber to the hatching chamber. Furthermore, the gas supply port is formed below the lower opening, so that the eggs in the vicinity of the lower opening can be returned to the upper part of the hatching chamber on the water flow generated by the gas supply again. preferable. In addition, each of the above hatching tanks may be used for the purpose of hatching live aquatic animals and releasing them to the aquarium and giving them to other aquatic animals, or hatching various aquatic animals for ornamental use. It may be used for the purpose of releasing into the water tank.
[0017]
Next, the basic inventive concept of the aquatic animal breeding tank of the present invention is to provide a first storage chamber and a second storage chamber capable of storing water or an aqueous solution, and between the first storage chamber and the second storage chamber. A boundary chamber having a first opening that opens to the first storage chamber and a second opening that opens to the second storage chamber, and the first chamber is provided via the boundary chamber. The storage chamber and the second storage chamber communicate with each other, and the first opening is formed above the second opening.
[0018]
According to this basic inventive concept, the aquatic animals pass through the boundary chamber and the first storage chamber and the second storage space while keeping the two types of water or aqueous solution in the first storage chamber and the second storage chamber by the above-described effects. Since it can be constituted so that it can go back and forth between the two storage rooms, it can be reared according to an environment suitable for aquatic animals.
[0019]
In this basic inventive concept, it is preferable that the vicinity of at least one of the first opening and the second opening in the boundary chamber is formed in a tubular shape.
[0020]
The boundary chamber is preferably formed in a tubular shape as a whole.
[0021]
Further, in each of the basic inventive concepts described above, it is preferable that the boundary chamber extends upward from the second opening along the outer surface of the second storage chamber. Moreover, it is preferable that a gas supply port is provided in the lower part of the hatching chamber. In this case, it is preferable that the boundary chamber includes an enlarged cross-sectional portion having an increased horizontal cross-sectional area between the second opening and the first opening. Moreover, it is preferable that the enlarged cross-sectional portion is formed below an intermediate height between the second opening and the first opening. Furthermore, it is desirable that the boundary chamber has an inner surface shape that is inclined downward toward the second opening in the vicinity of the second opening. The gas supply port is preferably formed below the second opening. Furthermore, it is preferable to provide a deterrent plate in the vicinity of the enlarged cross section for blocking the water flow rising from the second opening into the boundary chamber.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the fluid boundary region communication portion structure and the hatching tank and the aquatic animal breeding tank of the present invention, which are the basic inventive concept of the present invention, will be described. Each of the basic configurations and embodiments described below can be understood as a simple fluid boundary zone communication structure, but can also be used as a hatching tank or an aquatic animal breeding tank at the same time. Is.
[0023]
[First basic configuration]
FIG. 1 shows the structure of a first basic configuration according to the present invention. The interior of the container 10 is partitioned into a first storage chamber 12 and a second storage chamber 13 by a partition wall 11. Both the first storage chamber 12 and the second storage chamber 13 are configured to store a liquid such as water. A boundary chamber 14 is formed inside the partition wall 11 as a communication portion. The boundary chamber 14 includes a first opening 14 a that opens to the first storage chamber 12 and a second opening that opens to the second storage chamber 13. A portion 14b is formed. Here, the first opening 14 a is formed in the upper part of the boundary chamber 14, and the second opening 14 b is formed in the lower part of the boundary chamber 14.
[0024]
In this basic configuration, when two types of liquids A and B having different specific gravities are stored in the first storage chamber 12 and the second storage chamber 13, the boundary surface C of the two types of liquids A and B is substantially within the boundary chamber 14. It is formed horizontally. For example, when the liquid A has a specific gravity smaller than that of the liquid B as in the case where the liquid A is fresh water and the liquid B is salt water, the liquid A flows into the boundary chamber 14 from the first storage chamber 12 through the first opening 14a. And the liquid B flowing into the boundary chamber 14 from the second storage chamber 13 through the second opening 14b is encountered in the boundary chamber 14, but the liquid A has a lower specific gravity than the liquid B, In the chamber 14, the liquid A stays at the upper part and the liquid B tries to stay at the lower part. Therefore, as shown in the drawing, both liquids A and B are separated vertically with a horizontal boundary surface C therebetween.
[0025]
Here, when both the liquids A and B are insoluble in each other, the boundary surface C is maintained. However, when both the liquids A and B are soluble in each other like the above-described fresh water and salt water, both the liquids at the boundary surface C. Since A and B are in contact with each other, both liquids A and B are gradually mixed and mixed with time. However, since the area of the boundary surface C is limited by the shape and size of the separation chamber 14, the mixing speed is extremely slow.
[0026]
In addition, when a flow (convection) occurs in any one of the liquid A in the first storage chamber 12 and the liquid B in the second storage chamber 13 or fluctuation occurs, the boundary surface in the boundary chamber 14 is caused by the influence. C also shakes, and liquid A and liquid B are mixed. However, since the boundary chamber 14 is opened to the first storage chamber 12 and the second storage chamber 13 by the first opening portion 14a and the second opening portion 14b, the opening area of the first opening portion 14a and the second opening portion 14b. Is made smaller than the area of the boundary surface C in the boundary chamber 14, the influence of the fluctuation of the liquid in the first storage chamber 12 and the second storage chamber 13 can be reduced. When used as a water tank, the flow and shaking of the liquids A and B promote pumping and aeration performed to pass water to the filtration device (dissolving the air into the water by blowing out air in the water tank). Caused by water flow).
[0027]
The essential requirement for the configuration as described above is only that the first opening 14a of the separation chamber 14 is located above the second opening 14b. However, depending on the amount (liquid level) of the liquid A in the first storage chamber 12 and the liquid B in the second storage chamber 13, a situation may occur in which the boundary line C is not formed in the separation chamber 14. Adjust the liquid levels of A and B, or separate the formation positions of the first opening 14a and the second opening 14b in the separation chamber 14 to some extent in the vertical direction so as to cope with the change in the liquid level. It is necessary to form the boundary line C so that the boundary line C stays in the boundary chamber 14 even if the liquid level slightly varies.
[0028]
According to this basic configuration, two types of liquids A and B having different specific gravities can be communicated via the communication section called the boundary chamber 14 and the two liquids A and B are held so as not to mix with each other. be able to. Such a communication boundary structure of the fluid boundary region is a structure of a hatching tank in a case where an aquatic animal that hatches in seawater, which will be described later, is given to freshwater fish as a live food, or an aquatic structure in which a hatching tank and an aquarium are integrated. It can be used as the structure of an animal breeding tank. It can also be used as a breeding tank for aquatic animals that can survive in both seawater and freshwater. Furthermore, the structure of the boundary chamber of the present basic configuration can be used as a communication part structure for suppressing the mixing of seawater and fresh water while communicating the seawater and freshwater areas. In this case, when the water levels in the seawater area and the freshwater area rise and fall to some extent, the length in the vertical direction of the boundary chamber (the vertical distance between the first opening and the second opening) may be increased.
[0029]
Note that this basic configuration can be used industrially as a communication structure between the seawater and freshwater itself, but it can also be applied to various liquids or gases other than seawater and freshwater. Can do. In the case of gas, it is difficult to maintain the mixing suppression effect for a long time. For example, as a structure of a communication part between rooms having different temperatures or as a structure of a communication part between an air region and an inert gas region. It is fully available.
[0030]
[Second basic configuration]
Next, a second basic configuration according to the present invention will be described with reference to FIG. In this basic configuration, a partition wall 21 is provided in the container 20 as in the first basic configuration, and a first storage chamber 22 and a second storage chamber 23 are formed on both sides of the partition wall 21. A boundary chamber 24 is formed in the partition wall 21, a first opening 24 a that opens to the first storage chamber 22 is formed above the boundary chamber 24, and a second storage chamber 23 is formed below the boundary chamber 24. A second opening 24b that opens is formed. Further, the same liquid A as in the first basic configuration is stored in the first storage chamber 22, and the liquid B is stored in the second storage chamber 23.
[0031]
In this basic configuration, a first tubular portion 24c formed in a tubular shape is formed in the vicinity of the first opening 24a in the boundary chamber 24, and a tubular shape is formed in the vicinity of the second opening 24b in the boundary chamber 24. A second tubular portion 24d is formed. The first tubular portion 24c and the second tubular portion 24d are provided to suppress the propagation of the liquid sway between the first storage chamber 22 and the second storage chamber 23 and the boundary chamber 24. is there. The first tubular portion 24 c and the second tubular portion 24 d have a flow cross-sectional area that is sufficiently smaller than the boundary cross-sectional area of the boundary surface C in the boundary chamber 24.
[0032]
According to this basic configuration, by providing the first tubular portion 24c and the second tubular portion 24d with a reduced flow cross-sectional area, even if convection or shaking occurs in the liquid A in the first storage chamber 22, The influence of convection and shaking is hardly transmitted to the inside of the boundary chamber 24 by the one tubular portion 24c. Similarly, even if convection or shaking occurs in the liquid B in the second storage chamber 23, the influence of the convection or shaking is not easily transmitted to the inside of the boundary chamber 24 by the second tubular portion 24d. Therefore, the fluctuation of the boundary surface C between the liquid A and the liquid B formed in the boundary chamber 24 is reduced, and mixing of the liquid A and the liquid B is also suppressed.
[0033]
In particular, in this basic configuration, the first opening 24a and the second opening 24b are opened upward and downward with respect to the inside of the first storage chamber 22 and the second storage chamber 23, respectively. Since the first tubular portion 24c and the second tubular portion 24d are refracted substantially at right angles until reaching the boundary surface C in the boundary chamber 24, the boundary surface C in the boundary chamber 24 is It is further less affected by fluctuations in the second storage chamber 23.
[0034]
The above-described effects of the basic configuration can be obtained similarly when the liquid levels of the liquids A and B are changed up and down. For example, when the liquid level of the liquid A rises (when the liquid level of the liquid B falls), the liquid A enters the boundary chamber 24 from the first storage chamber 22 and pushes down the boundary surface C. When the liquid level of the liquid B rises (when the liquid level of the liquid A falls), the liquid B enters the boundary chamber 24 from the second storage chamber 23 and pushes up the boundary surface C. At this time, since the first tubular portion 24c and the second tubular portion 24d are provided, turbulence is unlikely to occur in the first tubular portion 24c and the second tubular portion 24d having a small diameter. Surface C moves up and down with little disturbance. Therefore, since the fluctuation of the boundary surface C is reduced, the liquid A and the liquid B are hardly mixed.
[0035]
[Third basic configuration]
Next, a third basic configuration according to the present invention will be described with reference to FIG. In this basic configuration, a partition wall 31, a first storage chamber 32, a second storage chamber 33, and a boundary chamber 34 are provided inside the container 30 in the same manner as the second basic configuration. In this basic configuration, the entire boundary chamber 34 is configured by a tubular body fixed to the partition wall 31. The boundary chamber 34 extends in the vertical direction along the partition surface defined by the partition wall 31, and includes a first opening 34a at the upper end and a second opening 34b at the lower end. The first opening 34 a opens into the first storage chamber 32 as described above, and the second opening 34 b opens into the second storage chamber 33.
[0036]
In this basic configuration, since the boundary chamber 34 is formed of a tubular body, the first opening 34a and the second opening 34b in the boundary chamber 24 can be easily formed apart from each other in the vertical direction. It has a structure that can withstand shaking and liquid level changes. Further, since the boundary cross-sectional area of the boundary surface C of the boundary chamber 34 can be easily reduced, the mixing degree of the liquid A and the liquid B can be suppressed, and the flow cross-sectional area of the boundary chamber 34 can be reduced overall. Also, since the turbulent flow is less likely to occur in the boundary chamber 34, the liquid sway is less likely to be transmitted in the boundary chamber 34.
[0037]
[ Fourth basic configuration ]
Next, according to the present invention with reference to FIG. Fourth basic configuration Will be described. this Fourth basic configuration Is suitable as an incubation tank disposed in a water tank. The hatching tank 40 is formed entirely of a synthetic resin colored black or brown, and is in a state in which external light does not easily reach inside. The hatching tank 40 is provided with a substantially cylindrical main body 41, and the main body 41 has a conical shape extending obliquely inward from the upper wall surface and gradually reducing its diameter, and eventually becomes cylindrical with an equal diameter. A separating wall 42 extending downward is formed. By this separation wall 42, an upper chamber 43 formed above the protruding portion of the separation wall 42, a communication path 44 inside the separation wall 42, and an outside of the separation wall 42 are formed inside the main body 41. A surrounding chamber 45 is defined.
[0038]
An air supply port 41a is formed at the lower end of the main body 41, and air is supplied from the air supply port 41a via an air tube (not shown). Further, the upper opening 41 b of the main body 41 is closed by a colored upper lid 47 in the same manner as the main body 41.
[0039]
The surrounding chamber 45 communicates with a boundary tube 46 protruding from the outer wall of the main body 41, and the tip of the boundary tube 46 is open. The inside of the boundary tube 46 functions as the above-described boundary chamber, the opening at the tip is an upper opening 46a corresponding to the first opening of each basic configuration, and the base and body of the boundary tube 46 The communicating part with the part 41 functions as a lower opening part 46b corresponding to the second opening part of each basic configuration.
[0040]
this Fourth basic configuration In FIG. 2, seawater or salt water (hereinafter simply referred to as “salt water”) D is placed in a container 40 and introduced into fresh water E as shown. Fresh water E is placed in a water tank, for example. Then, a boundary surface F between the salt water D and the fresh water E is formed inside the boundary pipe 46 constituting the boundary chamber according to the amount of the salt water D in the container 40 and the water level of the fresh water E.
[0041]
Next, the upper lid 47 is removed, and dried eggs of brine shrimp are introduced from the upper opening 41b, and air is supplied from the air supply port 41a. When the air supply is started, bubbles are introduced into the main body 41 from the air supply port 41a, and are lifted and released into the atmosphere on the water surface in the upper opening 41b. Along with the rising of the bubbles, a circulating water flow is generated inside the main body portion 41, rising in the communication path 44, reaching the upper chamber 43, and descending again from the upper chamber 43 in the communication path 44. The dried eggs introduced by this circulating water stream are stirred. In this state, the egg moves up and down along the circulating water flow, and part of the egg enters the lower part of the surrounding chamber 45 from the communication path 44. Since the wall surface of the surrounding chamber 45 is inclined monotonously downward toward the air supply port 41a, the egg that has entered the lower portion of the surrounding chamber 45 returns to the vicinity of the air supply port 41a due to its own weight and follows the introduced air. The inside of the communication path 44 is raised.
[0042]
If the above stirring is continued, hatching will start after about 12 hours have passed since the egg was introduced, and brine shrimp larvae will start swimming in the main body 41. Brine shrimp has the habit of gathering in a bright place. On the other hand, when the upper opening 41b of the main body 41 is closed by the upper lid 47, the inside of the main body 41 becomes dark, but the upper opening 46a at the tip of the boundary tube 46 opens to the outside. Then, light enters the surrounding chamber 45. For this reason, the hatched brine shrimp larva proceeds from the upper chamber 43 and the communication passage 44 to the surrounding chamber 45, and eventually swims from the upper opening 46a to the outside of the container through the boundary tube 46.
[0043]
In the above hatching tank 40, when air is introduced from the air supply port 41a, the water level of the salt water D in the main body 41 slightly rises and fluctuates up and down due to the influence of the circulating water flow generated by the introduction of the bubbles. The boundary surface F also moves up and down. Therefore, it is preferable that the boundary pipe 46 has a sufficient height in the vertical direction of the boundary pipe 46 rather than the vertical fluctuation so that no trouble is caused by the vertical fluctuation of the boundary surface F. Also book Basic configuration In the above description, the boundary tube 46 corresponds to the boundary chamber of each of the basic configurations described above. However, both the boundary tube 46 and the surrounding chamber 45 can function as a boundary chamber. For example, this is a case where the boundary surface F is formed inside the surrounding chamber 45. At this time, when the boundary surface F approaches the lower portion of the surrounding chamber 45, it is greatly affected by the air supply. Therefore, it is preferable that the boundary surface F be positioned as high as possible.
[0044]
In the lower right part of FIG. Fourth basic configuration The partial structure of this modification is shown. In this modification, the separation wall 42 ′ showing only a part of the main body 41 ′ Fourth basic configuration The peripheral chamber 45 'is defined outside the separation wall 42'. A boundary chamber 46 ′ formed outside the main body 41 ′ is communicated with the peripheral wall 45 ′ through a lower opening 46 ′ b. The boundary chamber 46 ′ is provided with an upper opening 46′a at the outer tip. In this modified example, the boundary chamber 46 ′ extends upward in close contact with the outer wall of the main body 41 ′, so that there is an advantage that the hatching tank can be configured more compactly.
[0045]
[ Of the present invention Embodiment]
Next, referring to FIG. 5 and FIG. Fruit An embodiment will be described. FIG. 5 is a longitudinal sectional view of the present embodiment, and FIG. 6 is an external view of the present embodiment. This embodiment is Basic configuration The hatching tank 50 is further optimized. The hatching tank 50 is formed integrally by blow molding. The incubation tank 50 is provided with an incubation chamber 52 and a boundary chamber 53 that are partitioned by a partition wall 51. An air supply port 52a is formed at the bottom of the hatching chamber 52, and an upper opening 52b is formed at the top. The upper opening 52 b is closed by the upper lid 54. The boundary chamber 53 is provided with an upper opening 53 a that opens to the side, a lower opening 53 b that communicates with the hatching chamber 52, and an upper opening 53 c that opens to the upper end of the boundary chamber 53. A mesh cap 55 having a mesh 55a is attached to the upper opening 53a, and the mesh 55a covers the upper opening 53a. The upper opening 53 c is closed by the upper lid 56.
[0046]
The outer wall of the incubation tank 50 is Fourth basic configuration The whole is formed of a synthetic resin colored black or brown. And the hatching tank 50 is introduce | transduced in the fresh water E put in the water tank etc. which are not shown in figure. Thereafter, salt is put into the hatching chamber 52 to obtain salt water D. Of course, after the upper opening 53a is closed and the salt water D is put in the hatching tank 50 in advance, the apparatus may be put in the fresh water E. In this case, the amount of salt water D in the hatching tank 50 and the extent (depth) of the hatching tank 50 with respect to the water level of the fresh water E are in balance with the boundary surface F formed in the boundary chamber 53. It is determined appropriately.
[0047]
In this embodiment, the boundary chamber 53 communicates with a lower opening 53b that opens at a lower portion of the hatching chamber 52, and is formed to extend upward from the lower opening 53b along the outer wall of the hatching chamber 52 as it is. Therefore, since the vertical height of the boundary chamber 53 can be increased, the position range of the boundary surface F can be widened, and the hatching tank 50 can be configured compactly as a whole. Moreover, since the upper opening 53c is formed in the upper end part of the boundary chamber 53, the eggshell which remains after a brine shrimp hatches can be floated on the water surface in the upper opening 53c, and an eggshell can be removed suitably. . This eggshell removal operation can be performed without lifting the hatching tank 50 from the fresh water E. Therefore, the cleaning interval of the hatching tank 50 can be reduced.
[0048]
The hatching tank 50 is formed with an enlarged diameter portion 53d having a large horizontal cross section at the lower portion of the boundary chamber 53, so that the boundary chamber 53 rides on a circulating water flow generated by air supply from the air supply port 52a. The invasion speed of the unhatched egg that has entered the inside can be reduced, and the unhatched egg can be smoothly returned to the hatching chamber 52 again along the inner wall surface inclined downward toward the air supply port 52a. In this case, as shown by the dotted line in the figure, a deterring plate 53e for suppressing the rise of the unhatched egg may be provided in the vicinity of the enlarged diameter portion 53d.
[0049]
The above Fourth basic configuration as well as Book The hatching tanks 40 and 50 according to the embodiment are configured to hatch the brine shrimp used as a live food and lead it to the outside (in the water tank), but the hatching tank of the present invention is limited to the hatching of the brine shrimp. It can also be used as a hatching tank for hatching the hatched larvae outside the hatching tank and allowing them to grow outside from the hatching tank. It is.
[0050]
The present invention 孵 The chemical tank and the aquatic animal breeding tank are not limited to the illustrated examples described above, and it is needless to say that various changes can be made without departing from the scope of the present invention.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view schematically showing the structure of a fluid boundary region communication portion and a first basic configuration of an aquatic animal breeding tank according to the present invention.
FIG. 2 is a schematic longitudinal sectional view schematically showing a communication boundary structure of a fluid boundary area and a structure of a second basic configuration of an aquatic animal breeding tank according to the present invention.
FIG. 3 is a schematic longitudinal sectional view schematically showing a communication boundary structure of a fluid boundary region and a structure of a third basic configuration of an aquatic animal breeding tank according to the present invention.
FIG. 4 shows the structure of the fluid boundary zone communication section and the hatching tank according to the present invention. Fourth basic configuration It is a schematic longitudinal cross-sectional view which shows typically the structure of this.
FIG. 5 shows a fluid boundary zone communication portion structure and hatching tank according to the present invention. The fruit It is a schematic longitudinal cross-sectional view which shows the structure of embodiment typically.
[Fig. 6] Fruit It is an external appearance perspective view which shows the outline of the external appearance of embodiment.
[Explanation of symbols]
10, 20, 30 container
11, 21, 31, 51 Partition wall
12, 22, 32 First containment chamber
13, 23, 33 Second containment chamber
14, 24, 34, 53 Boundary room
14a, 24a, 34a, 46a, 53a first opening
14b, 24b, 34b, 46b, 53b Second opening
40, 50 hatching tank
41 Body
41a, 52a Air supply port
41b, 52b, 53c Upper opening
42 Separation wall
43 Upper chamber
44 communication path
45 Surrounding room
46 Boundary pipe
47, 54, 56 Top cover
52 Hatching Room
55 Mesh cap

Claims (3)

And hatching chamber in order to hatch eggs aquatic animals in salt water, and a boundary chamber communicating through the lower opening against該孵reduction chamber, the boundary chamber, above said lower opening on opening is provided which opens Oite outside below the upper end portion of the hatching chamber comprising a gas supply port is provided in a lower portion of the hatching chamber, the boundary chamber the and the lower opening A hatching tank comprising an enlarged cross-sectional portion having an increased horizontal cross-sectional area between the upper opening and the upper opening . 2. The hatching tank according to claim 1, wherein the boundary chamber extends upward from the lower opening along the outer surface of the hatching chamber. An aquatic animal breeding tank, wherein the hatching tank according to claim 1 is disposed inside.

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