JP2009165372A - Fish culture apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase an oxygen concentration in pond water and to culture fishes in an pleasant environment while culturing fishes in a high density. <P>SOLUTION: The fish culture apparatus includes a foam spray machine 61 for spraying pressurized oxygen in a foamy state in water in a culture pond 100, a recovery container 62 that is arranged on the water surface of the culture pond 100 and recovers oxygen sprayed in a foamy state by the foam spray machine 61 and floating on the water surface from a lower opening part 70, a pressurizer 63 that pressurizes oxygen recovered by the recovery container 62 and supplies the oxygen to the gas spray machine 61 and an oxygen supply source 64 for supplying pressurized oxygen to the gas spray machine 61. The culture apparatus supplies pressurized oxygen from the oxygen supply source 64 to the foam spray machine 61 and recovers oxygen sprayed in a foamy state from the foam spray machine 61 into water by the recovery container 62, supplies recovered oxygen to the air spray machine 61 by the pressurizer 63 and sprays the oxygen into water in the culture pond 100. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fish culture device that supplies oxygen to pond water, and more particularly to a fish culture device that is optimal for tuna culture. However, in the present specification, an aquaculture device corresponding to a fish farm is used not only for enlarging fish but also for including a device for temporarily raising fish.

  Fish culture ponds can raise a large amount of fish in a favorable environment by increasing the oxygen concentration of the pond water. In order to realize this, an aquaculture device for increasing the oxygen concentration of pond water has been developed (see Patent Documents 1 and 2). Patent Document 1 describes an aquaculture device in which an air diffuser that performs fine and uniform aeration is provided at the bottom of an aquaculture pond. Moreover, the aquaculture apparatus of patent document 2 provides the aeration water channel which makes a pond water flow down naturally, and supplies pond water to this aeration water channel and replenishes oxygen.

These aquaculture devices can improve the oxygen concentration of the pond water by using a diffuser or an aeration channel, but cannot increase the oxygen concentration of the pond water quickly and efficiently. In particular, the aquaculture device previously developed by the present inventor (see Patent Document 3) is installed on the ground to force the pond water to flow in a certain direction. It is important to raise the oxygen concentration of the pond water considerably, as it can prevent fish collisions while densely farming. As shown in FIG. 1, this aquaculture apparatus has a plurality of ring ponds 91 arranged concentrically. In this aquaculture pond, the pond water of each ring pond 91 flows as indicated by arrows. This aquaculture pond can cultivate tuna and the like that are migratory fish with high density while swimming the fish against the pond water flow of the ring pond 91. This is because fish such as tuna can be cultivated in a clean alignment by swimming against the flow. It is important to increase the oxygen concentration of pond water, especially for devices that cultivate fish at high density, but with conventional devices, the oxygen concentration of the pond water is quickly increased to make the fish more comfortable and dense. There was a disadvantage that could not be farmed.
JP-A-8-37989 Registered Utility Model No. 3022030 Japanese Utility Model Publication No. 63-119357

  The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to provide a fish culture apparatus that can cultivate fish in a comfortable environment by raising the oxygen concentration of pond water while culturing fish at high density.

The fish culture apparatus of the present invention has the following configuration in order to achieve the above-described object.
The fish culture device is disposed on the water surface of the aquaculture pond 100 by injecting pressurized oxygen into the water of the aquaculture pond 100, and is injected into the aquatic pond 100 in the form of bubbles. A recovery container 62 that recovers oxygen floating on the water surface from the lower opening 70, a pressurizer 63 that pressurizes the oxygen recovered in the recovery container 62 and supplies the oxygen to the bubble injector 61, and the bubble injector 61 And an oxygen supply source 64 for supplying pressurized oxygen. The aquaculture device supplies pressurized oxygen from the oxygen supply source 64 to the bubble injector 61, collects oxygen that is injected in the form of bubbles from the bubble injector 61 into water in the recovery container 62, and collects the recovered oxygen. It is supplied to the bubble injector 61 by the pressurizer 63 and injected into the water of the culture pond 100.

  The fish culture apparatus according to claim 2 of the present invention uses the pressurizer 63 as a compressor.

  The fish culture apparatus according to claim 3 of the present invention includes a liquid level sensor 67 for detecting the liquid level of the recovery container 62, and the liquid level sensor 67 controls the pressurizer 63 to set the liquid level of the recovery container 62 to a predetermined level. Be entrusted to control to the extent of.

  The aquaculture apparatus according to claim 4 of the present invention includes a supply valve 65 that controls the supply amount of oxygen supplied from the oxygen supply source 64 to the bubble injector 61.

  In the fish culture apparatus according to claim 5 of the present invention, the culture pond 100 forcibly applies the ring wall 2 provided with the annular ring pond 1 having a predetermined width and the pond water of the ring pond 1 provided between the ring walls 2. A forced fluidizer 15 for fluidization and a fish take-up pond 5 which is arranged outside the ring pond 1 and in which the pond water of the ring pond 1 is circulated. is doing.

  In the fish culture apparatus according to claim 6 of the present invention, the intake pond 5 is arranged in parallel adjacent to the ring pond 1, and the pond water of both the intake pond 5 and the ring pond 1 is the same by the forced fluidizer 15. It is flowing in the direction.

  In the fish culture device according to claim 7 of the present invention, the intake pond 5 is narrower than the ring pond 1.

  In the fish culture device according to claim 8 of the present invention, a curved wall 52 is provided outside the outer ring wall 2A of the ring pond 1 in parallel with the outer ring wall 2A, and between the curved wall 52 and the outer ring wall 2A. The Torigami Pond 5 is provided.

  In the fish culture apparatus according to claim 9 of the present invention, an open / close guide 54 is provided at a connecting portion between the intake pond 5 and the ring pond 1, and the open / close guide 54 is opened to collect the fish in the ring pond 1. 5 is guided.

  In the fish culture apparatus according to claim 10 of the present invention, both ends of the intake pond 5 are connected to the ring pond 1, and the opening / closing guides 54 are provided at the connecting portions at both ends of the intake pond 5. Is opened to guide the fish in the ring pond 1 to the upper pond 5, and the other open / close guide 54 is opened to return the fish in the upper pond 5 to the ring pond 1.

  In the fish culture apparatus according to an eleventh aspect of the present invention, the open / close guide 54 has water permeability that allows the pond water to pass therethrough and does not allow the fish to pass therethrough.

  The fish culture apparatus of the present invention is characterized in that the fish can be cultivated in a comfortable environment by increasing the oxygen concentration of the pond water while culturing the fish at a high density. The aquaculture apparatus of the present invention has a bubble injector that injects pressurized oxygen into the water of the aquaculture pond, and an oxygen that is disposed on the water surface of the aquaculture pond and is jetted by the bubble injector and floats on the water surface. A recovery container that recovers from the lower opening, a pressurizer that pressurizes oxygen recovered in the recovery container and supplies the oxygen to the bubble injector, and an oxygen supply source that supplies pressurized oxygen to the bubble injector , Supply pressurized oxygen to the bubble injector from the oxygen supply source, collect oxygen injected into the water from the bubble injector in the recovery container, and supply the recovered oxygen to the bubble injector with the pressurizer This is because it is sprayed into the water of the aquaculture pond. The aquaculture device of the present invention injects oxygen supplied from the oxygen supply source to the bubble injector into the pond water from the bubble injector and dissolves it in the pond water, and collects the oxygen not dissolved in the pond water in the recovery container. Since the pressure is applied by the pressurizer and supplied to the bubble injector and injected into the pond water, the oxygen supplied from the oxygen supply source can be circulated into the pond water without being wasted and efficiently dissolved in the pond water. Therefore, fish can be cultivated at a high density while increasing the oxygen concentration of the pond water to create a comfortable environment.

  Furthermore, since the fish culture apparatus according to claim 2 of the present invention uses the pressurizer as a compressor, the recovered oxygen can be pressurized to a high pressure, supplied to the bubble injector, and injected from the bubble injector into fine bubbles. .

  Furthermore, the fish culture apparatus according to claim 3 of the present invention includes a liquid level sensor for detecting the liquid level of the recovery container, and the liquid level sensor controls the pressurizer to keep the liquid level of the recovery container within a predetermined range. Since it controls, the oxygen supplied from an oxygen supply source can be efficiently dissolved in pond water while controlling the amount of oxygen recovered in the recovery container to an optimum amount.

  Furthermore, the fish culture apparatus according to claim 4 of the present invention includes a supply valve that controls the supply amount of oxygen supplied from the oxygen supply source to the bubble injector, so that the supply amount of oxygen from the oxygen supply source is controlled. Then, the dissolved oxygen concentration of pond water can be adjusted.

  Furthermore, in the fish culture apparatus according to claim 5 of the present invention, the culture pond forcibly flows the ring wall provided with the annular ring pond having a predetermined width and the pond water of the ring pond provided between the ring walls. A forced fluidizer, and a fish take-up pond that is placed outside the ring pond and through which the pond water of the ring pond is circulated. It can grow without damaging fish. It is a part used by the intake pond when taking out the fish, and is usually an area where fish are not allowed to swim. This is because they do not collide with and be damaged by these bubble injectors and recovery containers. Thus, the aquaculture device in which the bubble injector and the collection container are arranged in the intake pond can increase the dissolved oxygen concentration of the pond water while effectively preventing the fish from colliding. In particular, fish with a high migration speed and a large amount of required oxygen can be cultivated in a favorable state while effectively preventing damage due to collision.

  Furthermore, in the fish culture apparatus according to claim 6 of the present invention, the intake pond is disposed in parallel adjacent to the ring pond, and the pond water of both the intake pond and the ring pond is directed in the same direction with a forced fluidizer. Is flowing. This aquaculture device can smoothly guide fish swimming in the ring pond against the flow from the ring pond to the Toritake pond. In addition, since the fish guided to the Toriike pond swims against the flow in the Toriike pond, the relative speed to the Toriike pond can be reduced even if the speed to the pond water is high. This is because the moving speed of the fish relative to the intake pond is the difference between the swimming speed of the fish and the flow speed of the pond water. For this reason, the fish guided to Torikami Pond can be easily supplemented and taken up. In addition, the pond water of the Toritake pond having a high oxygen concentration can be made to flow with a forced fluidizer and circulate throughout the ring pond.

  Furthermore, since the culture device of Claim 7 of this invention makes the width | variety of the intake pond narrower than a ring pond, the fish guided to the intake pond can be picked up easily.

  Furthermore, in the aquaculture device according to claim 8 of the present invention, a curved wall is provided outside the outer ring wall of the ring pond in parallel with the outer ring wall, and the intake pond is provided between the curved wall and the outer ring wall. Provided. This structure can be easily provided with a curved wall outside the ring wall, and the intake pond and the ring pond are arranged in parallel, so that the fish swimming in the ring pond can be smooth. You can guide to Torikami Pond.

  Further, in the aquaculture device according to claim 9 of the present invention, an open / close guide is provided at a connection portion between the intake pond and the ring pond, and the open / close guide is opened to guide the fish in the ring pond to the upper pond. Therefore, the fish swimming in the ring pond can be surely guided to the Toritake pond. In particular, in the aquaculture device according to claim 10 of the present invention, both ends of the intake pond are connected to the ring pond, and opening / closing guides are provided at the connecting portions at both ends, and one of the opening / closing guides is opened to feed the fish in the ring pond. Guide to the Toriike Pond and open the other open / close guide to return the Toriike Pond fish to the Ring Pond. The Toriike Pond with this structure smoothly guides the fish in the Ring Pond to the upper pond, determines the size of the fish in the Toriike Pond, and the fish to be picked up is discharged from the Tori Pond. You can easily return to the ring pond by opening the open / close guide. For this reason, it is possible to discharge while picking up the fish to be picked up easily. In the aquaculture device according to claim 11 of the present invention, the open / close guide has a water permeability structure that allows the pond water to pass through but does not allow the fish to pass through, so that the oxygen concentration is increased while the open / close guide is closed. Circulating the pond water of Toriike pond to the ring pond can increase the dissolved oxygen concentration in the ring pond. Moreover, since the pond water of the Toritake pond can be circulated, it is possible to effectively prevent the water of the Tori pond from stagnation.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below exemplifies a fish culture apparatus for embodying the technical idea of the present invention, and the present invention does not specify the following culture apparatus.

  Further, in this specification, for easy understanding of the scope of claims, numbers corresponding to the members shown in the embodiments are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  2 to 4 show an aquaculture device that is optimal for tuna culture. The aquaculture apparatus shown in the figure is suitable for aquaculture of migratory fish such as tuna. However, the aquaculture apparatus of the present invention does not specify the fish to be cultivated as a tuna or a migratory fish. This is because it can also be used for aquaculture of fish other than tuna and migratory fish.

  The aquaculture apparatus shown in the figure is an aquaculture pond 100 that is installed on the ground and grows while swimming tuna, and an oxygen replenishment apparatus 60 that replenishes the pond water of the aquaculture pond 100 to increase the dissolved oxygen concentration of the pond water. Is provided. The aquaculture pond 100 includes a ring wall 2 provided with an annular ring pond 1 having a predetermined width, and a forced fluidizer 15 forcibly flowing the pond water of each ring pond 1 provided between the ring walls 2. Prepare.

  The oxygen replenishing device 60 is disposed on the water surface of the culture pond 100 and is injected in the form of bubbles by the bubble injector 61. A recovery container 62 that recovers oxygen floating on the water surface from the lower opening 70, a pressurizer 63 that pressurizes the oxygen recovered in the recovery container 62 and supplies the oxygen to the bubble injector 61, and the bubble injector 61 And an oxygen supply source 64 for supplying pressurized oxygen.

  The bubble injector 61 is disposed at the bottom of the culture pond 100 and injects oxygen from the bottom of the culture pond 100 into the pond water as fine bubbles. This bubble injector 61 has innumerable fine spray ports. Oxygen pressurized from this spraying port is jetted into water, and oxygen is jetted into fine bubbles. The injected oxygen can be efficiently dissolved in pond water as finer bubbles. This is because the contact area between oxygen and pond water can be increased by forming fine bubbles. Accordingly, the bubble injector 61 injects oxygen into the water as fine bubbles. A part of the oxygen injected into the pond water as fine bubbles is dissolved in the pond water, but the whole is not dissolved, and the undissolved oxygen rises to the water surface as bubbles.

  The oxygen supply source 64 supplies pressurized oxygen to the bubble injector 61. The oxygen supply source 64 is an oxygen cylinder 64A that stores pressurized oxygen. The oxygen cylinder 64A has a simple structure and can supply pressurized oxygen to the bubble injector 61. However, an oxygen generator that separates oxygen from air and pressurizes the separated oxygen to supply it to the bubble injector can be used as the oxygen supply source. The oxygen supply source 64 is connected to the bubble injector 61 via the supply valve 65. The supply valve 65 controls the flow rate of oxygen supplied to the bubble injector 61. The supply valve 65 controls the supply amount of oxygen so that the dissolved oxygen concentration in the pond water falls within a predetermined range. The supply valve 65 controls the amount of oxygen supplied to the bubble injector 61 so that the dissolved oxygen concentration of pond water becomes 10 ppm, for example. However, since the dissolved oxygen concentration in the pond water varies depending on the type, size, number, etc. of the fish to be cultivated, for example, the dissolved oxygen concentration can be controlled to an optimum value in the range of 5 ppm to 30 ppm, preferably 5 ppm to 20 ppm. . Further, as shown in FIG. 3, the dissolved oxygen concentration of the pond water is detected by the oxygen concentration sensor 66, and the supply valve 65 is controlled by the oxygen concentration sensor 66 to control the dissolved oxygen concentration of the pond water within the control range. it can.

  The oxygen injected from the bubble injector 61 into the pond water becomes bubbles and floats on the water surface. A part of the bubbles floating on the pond water dissolves in the pond water. However, not all of the oxygen bubbles are dissolved in the pond water. Oxygen that is not dissolved in the pond water floats on the water surface in the form of bubbles. Oxygen that floats on the water surface is recovered in the recovery container 62. Therefore, the collection container 62 stores bubbles that are opened downward and float. The recovery container 62 is provided with a peripheral wall 71 in the periphery so as not to leak recovered oxygen, and a lower portion of the peripheral wall 71 is inserted in water. The collection container 62 is an airtight container that closes the lower opening 70 with pond water. Further, the recovery container 62 collects the rising oxygen bubbles, and is thus disposed at a position where the oxygen bubbles rise. In the illustrated collection container 62, the float 72 is fixed, and the float 72 floats on the surface of the pond water. However, the collection container can be fixed to the culture pond and placed at a fixed position of the culture pond.

  The pressurizer 63 sucks in oxygen recovered by the recovery container 62 and supplies it to the bubble injector 61. The pressurizer 63 shown in the figure supplies oxygen to be pressurized to a bubble injector 61 that injects oxygen from an oxygen supply source 64 into water. However, as shown in FIG. 5, the aquaculture apparatus of the present invention applies oxygen pressurized by the pressurizer 63 to the bubble injector 61 provided separately from the bubble injector 61 that injects oxygen from the oxygen supply source 64. It can also be supplied and injected from the bubble injector 61 into the pond water. The pressurizer 63 can be a compressor or a pressure fan. A pressurizer 63 composed of a compressor can pressurize the recovered oxygen to a high pressure and supply it to the bubble injector 61. For this reason, fine bubbles can be ejected from the bubble ejector 61. The pressure fan has a simple structure and can suck a large amount of oxygen from the collection container and supply it to the bubble injector.

  As the recovery vessel 62 recovers oxygen bubbles floating in the pond water, the internal liquid level decreases. The recovery container 62 shown in the figure includes a liquid level sensor 67 for detecting the liquid level, and the pressurizer 63 is controlled by the liquid level sensor 67. As shown in FIG. 6, the liquid level sensor 67 operates the pressurizer 63 when the liquid level in the collection container 62 decreases to the lower limit level. The pressurizer 63 to be operated sucks oxygen in the recovery container 62 and raises the liquid level. The oxygen sucked into the pressurizer 63 is jetted in the form of bubbles from the bubble injector 61 to the bottom of the culture pond 100. When the liquid level increases to the upper limit level, the liquid level sensor 67 stops the operation of the pressurizer 63 as shown in FIG. When the operation of the pressurizer 63 is stopped, the liquid level does not increase. When the operation of the pressurizer 63 is stopped, the liquid level gradually decreases with the recovered oxygen. When the liquid level decreases, the liquid level sensor 67 operates the pressurizer 63 again to increase the liquid level. The liquid level sensor 67 operates the pressurizer 63 in this way, and controls the liquid level in the recovery container 62 to a range between an upper limit level and a lower limit level.

  If the liquid level in the recovery container 62 is lowered to the lower limit level and the liquid level sensor 67 is operating the pressurizer 63 and the liquid level does not rise, the liquid level sensor 67 increases the opening of the supply valve 65. The amount of oxygen supplied to the bubble injector 61 by the supply valve 65 is reduced by controlling the throttle. In this state, the liquid level sensor 67 reduces the supply oxygen amount by reducing the opening of the supply valve 65 until the liquid level rises. When the supply valve 65 is throttled and the amount of oxygen injected by the bubble injector 61 is reduced, and the amount of oxygen supplied by the pressurizer 63 is larger than the amount of oxygen floating on the recovery container 62, the liquid in the recovery container 62 Face level will increase. When the liquid level increases to the upper limit level, the liquid level sensor 67 stops the operation of the pressurizer 63. By repeating the above operation, oxygen is supplied from the oxygen supply source 64 to the bubble injector 61, and the oxygen recovered in the recovery container 62 is pressurized by the pressurizer 63 and supplied to the bubble injector 61. Part of the oxygen injected from the bubble injector 61 into the pond water is dissolved in the pond water, and the undissolved oxygen circulates through the recovery container 62, the pressurizer 63, and the bubble injector 61 and is dissolved in the pond water. . Therefore, the oxygen supplied from the oxygen supply source 64 is efficiently dissolved in the pond water.

  In the culture pond 100 provided with the oxygen supply device 60, the annular ring ponds 1 shown in FIGS. 2 and 8 are arranged concentrically in a plurality of rows. The ring pond 1 has a groove shape having a predetermined width and height and opens upward. The culture pond 100 in the figure has four rows of ring ponds 1 concentrically provided. In the four rows of ring ponds 1, intermediate ring ponds 1B and 1C are provided between the innermost ring pond 1A and the outermost ring pond 1D so that the width of each ring pond 1 is uniform. However, the width of each ring pond can be gradually increased toward the outside. In the ring pond 1, for example, the inner diameter of the innermost ring pond 1A is 5 m, and the width of each ring pond 1 is 3.5 m. The ring pond 1 can gradually increase the area of each ring pond 1 from the inside toward the outside. Moreover, the height of the ring wall 2 which comprises the ring pond 1 shall be 2.7 m, for example. However, the aquaculture pond does not specify the width of the ring pond and the height of the ring wall. The width and depth of the ring pond are designed to be optimal in consideration of the type and size of fish to be cultivated or bred. For example, the width of the ring pond can be 1 m to 5 m, and the height of the ring wall can be 50 cm to 5 m. Furthermore, although the culture pond 100 described above is provided with four rows of ring ponds 1, the culture pond can be provided with five or more rows or two or three rows of ring ponds.

  The aquaculture pond 100 in the figure has a circular ring wall 2 fixed vertically on the ground, and the ring walls 2 are provided on both sides of the ring pond 1. In the culture pond 100 of FIGS. 9 and 10, a soil concrete 23 is placed on the ground, and a bottom plate 24 made of a plastic plate is fixed on the soil concrete 23. Furthermore, the ring pond 1 is provided on the bottom plate 24 by bonding or welding a circular plastic plate to be the ring wall 2 and fixing it vertically. The soil concrete 23 has a thickness of 20 cm, for example, and a 5 mm thick polyethylene plate is used as the plastic plate. However, the soil concrete and plastic plate can be made thicker and stronger, so the optimum value depends on the size of the ring pond. Further, in the culture pond 100 of FIGS. 9 and 10, concrete 25 is fixed and reinforced on the outer side of the outermost outer ring wall 2A.

  A ring wall 2 between adjacent ring ponds 1 is provided with an opening 3 in part. This opening 3 is blocked by a water-permeable partition material 4 that can pass through pond water so that fish do not pass through it. The water-permeable partition material 4 shown in FIG. 11 is a lattice 30 that connects a plurality of horizontal rods 31 apart from each other. The horizontal rod 31 of the lattice 30 is deformed in a direction along the ring wall 2 in a horizontal plane. The interval between the horizontal rods 31 constituting the lattice 30 is set to a gap that allows the fish to pass through the pond water, for example, 1 cm to 5 cm. The water-permeable partition material 4 of the lattice 30 closes the opening 3 of the ring wall 2 so as to allow the pond water to pass therethrough and not pass the fish. However, the aquaculture pond does not specify the water-permeable partition material as a lattice. As the water-permeable partition material, all other materials that can pass through pond water but can be blocked so that fish do not pass through, such as a net or a net, can be used.

  The water-permeable partition member 4 of the lattice 30 bends the horizontal rod 31 deformed in the direction along the ring wall 2 to the same curvature radius as the ring wall 2 connecting the water-permeable partition member 4 in the horizontal plane. ing. The aquaculture pond 100 can effectively prevent the fish swimming along the ring pond 1 from coming into contact with the lattice 30 by arranging the ring wall 2 and the lattice 30 on one circumference. The horizontal rod 31 is a metal round pipe such as stainless steel.

  As shown in FIGS. 12 and 13, the grid 30 of the water-permeable partition member 4 connects the horizontal rod 31 with the upper and lower rods 32. The upper and lower rods 32 connect a plurality of positions in the middle of the horizontal rod 31 to keep the distance between the horizontal rods 31 constant. The upper and lower rods 32 pass through the horizontal rod 31 and are connected at regular intervals. The upper and lower rods 32 are inserted through spacer cylinders 33 that hold the horizontal rods 31 at regular intervals. The spacer cylinder 33 is sandwiched between the upper and lower horizontal rods 31 and fixed between the horizontal rods 31. The upper and lower rods 32 have a flange 34 at one end and are provided with a male screw 35 at the other end, and a nut 36 is screwed into the male screw 35 to fix the horizontal rod 31. Further, the lattice 30 of the water-permeable partition member 4 in the figure covers the surface of the spacer cylinder 33 with a rotating pipe 37. The rotary pipe 37 covers the surface of the spacer cylinder 33 so that it can rotate. Therefore, the rotary pipe 37 has an inner diameter larger than the outer diameter of the spacer cylinder 33 and a total length shorter than the spacer cylinder 33. The rotary pipe 37 is a metal pipe such as stainless steel.

  Further, the lattice 30 of the water-permeable partition member 4 is connected via the groove-shaped connecting member 38 by inserting both ends of the horizontal rod 31 into the groove of the groove-shaped connecting member 38. The groove-shaped connecting member 38 is also a groove-shaped steel made of metal such as stainless steel. The lattice 30 is fixed with a set screw 39 so as to penetrate the groove-shaped connecting member 38 and the horizontal rod 31. The set screw 39 penetrates the horizontal connecting rod 38 and the horizontal rod 31 so as to penetrate the horizontal rod 31 in the diameter direction, and fixes the horizontal rod 31 to the connecting groove 38. Although not shown, the horizontal rod 31 and the groove-shaped connecting member 38 can be connected with a rivet regardless of a set screw, or can be connected by welding.

  In the water-permeable partition member 4 of the lattice 30 described above, the horizontal rod 31, the rotary pipe 37, and the groove-shaped connecting member 38 are made of metal such as stainless steel. The water-permeable partition material 4 that is the metal lattice 30 has a feature that the whole can be strengthened. However, as for the water-permeable partition material of the lattice, the horizontal rod, the rotating pipe, and the groove-shaped connecting material can be made of plastic. The plastic lattice is made of plastic such as polyvinyl chloride or polyethylene. In this way, the water-permeable partition material made of plastic can be manufactured at low cost while lightening the whole.

  The water-permeable partition member 4 of the lattice 30 is connected to one side edge 3A of the opening 3 of the ring wall 2 so that one side of the lattice 30 can be tilted in a horizontal plane via the groove-shaped connecting member 38. As shown in the enlarged sectional view of FIG. 14, the lattice 30 is connected to the ring wall 2 so that it can be tilted via a groove-shaped connecting member 38 and a hinge 40 fixed to the inner surface of the opening 3 of the ring wall 2. ing. The water-permeable partition material 4 of the lattice 30 is connected to the other side edge 3B of the opening 3 so that the side edge opposite to the hinge 40 can be attached to the other side edge 3B. Furthermore, the water-permeable partition member 4 shown in FIG. 11 is provided with a roller 41 at the lower end of the groove-shaped connecting member 38 that is the detachable portion 4A so that it can be smoothly tilted in the horizontal plane. The water-permeable partition material 4 can be smoothly tilted by rotating the roller 41 along the bottom surface of the ring pond 1.

  The water-permeable partition material 4 of the lattice 30 removes the attachment / detachment portion 4A and is connected to the inner ring wall 2 to transfer the fish from the inner ring pond 1 to the outer ring pond 1. Although not shown in the drawings, the water-permeable partition material can also connect the desorption part to the outer ring wall and transfer the outer fish to the inner side. The water-permeable partition material 4 shown in FIGS. 2 and 8 is wider than the ring pond 1 and is inclined with respect to the ring wall 2 while being connected to the inner or outer ring wall 2. This water-permeable partition material 4 can smoothly transfer fish to the adjacent ring pond 1.

  Furthermore, the fish pond 100 of FIGS. 2 and 8 has a fish collection pond 5 outside the ring pond 1. The aquaculture pond 100 in the figure has a curved wall 52 provided in parallel to the outer ring wall 2A on the outside of the outer ring wall 2A of the ring pond 1, and the intake pond 5 is provided between the curved wall 52 and the outer ring wall 2A. Provided. The intake pond 5 is provided adjacent to the outermost outermost ring pond 1D and parallel to the outermost ring pond 1D. The Torigami pond 5 is narrower than the ring pond 1. The width of the intake pond 5 is, for example, 50 cm or more and 1.5 m or less.

  Furthermore, the culture pond 100 is provided with an open / close guide 54 at the connecting portion between the intake pond 5 and the ring pond 1, and the open pond 5 is connected to the outermost ring pond 1 </ b> D via the open / close guide 54. Yes. The aquaculture pond 100 opens the open / close guide 54 to guide the fish in the ring pond 1 to the upper pond 5. The outer ring wall 2 </ b> A is provided with an opening 3 at a connecting portion between the intake pond 5 and the outermost ring pond 1 </ b> D, and the opening 3 is closed with an opening / closing guide 54. 2 and 8, both ends of the intake pond 5 are connected to the ring pond 1, and an open / close guide 54 is provided at a connection portion at both ends of the intake pond 5. The intake pond 5 opens one open / close guide 54 to guide the fish in the ring pond 1 to the upper pond 5, and opens the other open / close guide 54 to return the fish in the intake pond 5 to the ring pond 1. Can do. However, only one end of the Toritake Pond can be connected to the Ring Pond.

  The open / close guide 54 shown in FIG. 2 is a lattice 30 having the same structure as the water-permeable partition member 4 shown in FIG. The open / close guide 54, which is the lattice 30, can reliably guide the fish to the intake pond 5 as a structure having water permeability that allows the pond water to pass therethrough and prevents the fish from passing therethrough. However, the open / close guide does not necessarily have to be a lattice, and can use a net or a net to pass pond water, but can also be configured to prevent fish from passing. In this way, the structure in which the opening / closing guide 54 has water permeability does not cause the water in the intake pond 5 to be absorbed, and the pond water is supplied from the intake pond 5 to the ring pond 1 and from the ring pond 1 to the intake pond 5. The pond water is ideally circulated in the intake pond 5 and the ring pond 1 by flowing. In particular, the opening / closing guide 54 having water permeability can be opened and closed easily and smoothly even when the pond water is circulated in the intake pond 5 and the ring pond 1 because the entire water-reducing guide 54 can be lightened and the resistance of the water can be reduced. However, it is not always necessary for the aquaculture pond to have a structure that allows water to pass through the pond water. It is a member for connecting the outermost ring pond 1D to the upper pond 5 only when this open / close guide 54 guides the fish to the upper pond 5, and it is necessary to pass the pond water in the normal time. Because there is no. Therefore, the open / close guide can be a non-permeable member.

  The open / close guide 54 shown in FIGS. 2 and 8 is connected so as to be movable from the outer guide wall 2A, which is the outer wall of the outermost ring pond 1D, to the inner wall, and the open / close guide 54 is connected to the inner side of the outermost ring pond 1D. It is connected to the wall so that the fish in the outermost ring pond 1D can be moved to the upper pond 5. The open / close guide 54 is connected to one side edge 3A of the opening 3 of the outer ring wall 2A so that it can tilt in a horizontal plane. This open / close guide 54 can be connected to the outer ring wall 2A so as to be tilted in the same manner as the structure shown in FIG. 14, that is, via a hinge fixed to the side edge 3A of the opening 3. Further, the open / close guide 54 is connected to the other side edge 3B of the opening 3 so that the opposite side edge can be attached to and detached from the other side edge 3B. The opening / closing guide 54 shown in FIGS. 2 and 8 is wider than the outermost ring pond 1D and is inclined with respect to the ring wall 2 in a state of being connected to the inner wall. The open / close guide 54 can smoothly transfer the fish to the intake pond 5.

  In FIG. 8, the open / close guide 54 connected to the right end of the intake pond 5 moves to the position indicated by the chain line in the figure (the direction indicated by the arrow A in FIG. 2) and removes the fish from the outermost ring pond 1D. Transfer to upper pond 5 The open / close guide 54 is connected to the solid line position, and the fish in the outermost ring pond 1D is allowed to swim to the outermost ring pond 1D without being transferred to the upper pond 5. Further, the open / close guide 54 connected to the upper left end of the intake pond 5 in FIG. 8 moves to the position indicated by the chain line in the figure (the direction indicated by the arrow B in FIG. 2) and moves to the intake pond 5. Can be returned to the outermost ring pond 1D. The aquaculture pond 100 in which the intake pond 5 can be connected to the outermost ring pond 1D and the fish in the outermost ring pond 1D can be transferred to the upper pond 5 by the opening / closing guide 54. Can be taken out. Further, the fish that has moved to the collection pond 5 and is not taken out can be easily moved from the collection pond 5 to the outermost ring pond 1D by operating the open / close guide 54. For this reason, the fish can be efficiently removed from the culture pond 100 while selecting the fish to be removed.

  2 and FIG. 8, the bubble injector 61 and the collection container 62 of the oxygen supply device 60 are arranged in the upper pond 5. The bubble injector 61 is disposed at the bottom of the collection pond 5, and the collection container 62 is disposed at the top of the collection pond 5. As shown by the arrow in FIG. 8, pond water that is forced to flow is circulated in the intake pond 5. The take-up pond 5 causes the pond water that is forced to flow into the ring pond 1 through the inflow side opening / closing guide 54 and is discharged from the discharge side opening / closing guide 54. Therefore, the aquaculture device in which the bubble injector 61 and the recovery container 62 are disposed in the intake pond 5 can circulate the pond water in the intake pond 5 to the ring pond 1 and increase the dissolved oxygen concentration in the ring pond 1. The open / close guide 54 of the take-up pond 5 is closed except when the fish is taken up. Therefore, the catch pond 5 is an area where fish such as tuna are not allowed to swim with the open / close guide 54 closed. In the aquaculture device in which the bubble injector 61 and the recovery container 62 are disposed in this region, a fish such as a tuna swimming does not collide with the bubble injector 61 or the recovery container 62 and be damaged. In particular, fish migrating at high speed, such as tuna, are not significantly damaged by a collision during aquaculture, but the structure in which the bubble jet 61 and the collection container 62 are arranged in the intake pond 5 effectively prevents the fish from colliding. The dissolved oxygen concentration in pond water can be increased. For this reason, tuna with a large amount of required oxygen can be cultivated in a preferable state while effectively preventing damage due to collision because the migration speed is high. Furthermore, since the intake pond 5 is not an area where fish are allowed to swim, the flow velocity for forced flow can be reduced compared to the ring pond 1. This means that the horizontal distance over which the bubbles ejected from the bubble ejector 61 are moved in the flow is shortened. In other words, the bubbles ejected into the pond water float upward and are disposed above the collection container. 62 can be efficiently recovered. For this reason, the characteristic which can be efficiently recovered and dissolved in pond water without wasting oxygen is also realized. Furthermore, since the aquaculture apparatus in the figure drains from the center of the ring pond 1, the pond water flows from the outer periphery to the center while supplying oxygen to the pond water of the intake pond 5 provided on the outer periphery of the ring pond 1. By doing so, the feature that oxygen can be efficiently replenished to the whole pond water is also realized.

  In this aquaculture device, when the fish is taken up from the upper pond 5, the bubble injector 61 and the collection container 62 are removed from the upper pond 5. This is to prevent the fish put in the Toriike Pond 5 from colliding and being damaged. However, the bubble injector can be buried in the bottom of the intake pond and the upper surface thereof can be arranged on the same surface as the bottom surface of the intake pond to prevent fish from colliding. This bubble injector does not need to be removed when the fish is put into the upper pond, and can pick up the fish while injecting oxygen. The collection container 62 that is floated on the collection pond 5 by the float 72 can be easily removed from the collection pond 5 and taken out.

  FIG. 15 shows a lifting tool 10 that can easily remove the fish in the collecting pond 5 without damage. The lifting tool 10 shown in these figures includes a loading portion 10A that guides the fish inward in the collecting pond 5 and a pulling portion 10B that is connected to both ends of the loading portion 10A. As shown in the figure, the pick-up tool 10 can be taken out from the upper pond 5 in a state where the fish is put into the mounting portion 10A and pulled up by the pull-up portion 10B and is not damaged. In the lifting tool 10 of FIG. 15, two rods 14 are connected to both sides of a sheet material 11, the sheet material 11 is used as a loading portion 10A, and the rod 14 is used as a pulling portion 10B. The sheet material 11 which is the mounting portion 10 </ b> A is obtained by connecting water-permeable nets 13 to both sides of a non-water-permeable bottom sheet 12. The water flow net 13 is a sheet formed by providing a large number of through holes in a net material or a sheet so that water can flow.

The collecting tool 10 takes out the fish in the collecting pond 5 as follows.
(1) In FIG. 8, the open / close guide 54 connected to the right end of the intake pond 5 is set as a solid line position, and the interval between the two rods 14 is set with no fish in the intake pond 5. And spread the sheet material 11 into the upper pond 5.
(2) After that, the open / close guide 54 at the right end of the intake pond 5 in FIG. 8 is moved to the position indicated by the chain line (the direction indicated by the arrow A in FIG. 2), and the fish in the outermost ring pond 1D is taken up. Move to. At this time, the upper left open / close guide 54 of the intake pond 5 closes the upper left end of the intake pond 5 as a position indicated by a solid line so that the fish in the intake pond 5 does not return to the outermost ring pond 1D.
(3) When the two rods 14 serving as the pulling portion 10B are lifted, the fish on the sheet material 11 serving as the placing portion 10A is taken up from the intake pond 5. At this time, as shown in FIG. 15, the fish rides vertically on the bottom sheet 12 and does not get out of order, and the water is drained from the water net 13 of the sheet material 11. Therefore, in a state where the fish is on the bottom sheet 12, the fish can be drained and taken out, and the fish can be taken out efficiently without damaging the fish.

  The pond water of the ring pond 1 is caused to flow by the forced fluidizer 15 so as to rotate in the same direction. Further, the forced fluidizer 15 also causes the pond water of the intake pond 5 disposed adjacent to the outside of the ring pond 1 to flow in the same direction as the ring pond 1. That is, the forced fluidizer 15 in the figure causes the pond water of both the intake pond 5 and the ring pond 1 to flow in the same direction. The aquaculture pond 100 opens the open / close guide 54 and connects the take-up pond 5 to the outermost ring pond 1D to take fish swimming in the outermost ring pond 1D against the flow from the outermost ring pond 1D. Guide to the upper pond 5 more smoothly. In addition, the fish guided to the Toriike pond 5 swims in the Toriike pond 5 against the flow, so that the fish guided to the Toriike pond 5 can be easily supplemented and taken up. This is because even if the speed of the fish relative to the pond water is high, the relative speed relative to the intake pond 5 can be decreased.

  The forced fluidizer 15 shown in FIGS. 2 and 8 to 10 includes a pump 16 and a water supply pipe 17 that fixes a nozzle 18 for injecting pond water pressurized and discharged by the pump 16. In the aquaculture pond 100 in these drawings, the water supply pipe 17 is arranged at an opposing position. A pump 16 that supplies pond water to a water supply pipe 17 disposed on the left side in FIGS. 8 and 9 is a submersible pump, sucks pond water, pressurizes it, and supplies it to the water supply pipe 17. A pump 16 that supplies pond water to a water supply pipe 17 disposed on the right side in FIGS. 8 and 9 sucks water purified in a purification tank 28 described later, pressurizes the water, and supplies it to the water supply pipe 17. The water supply pipe 17 is disposed away from the liquid level of the ring pond 1. The water supply pipe 17 does not collide with fish swimming in the ring pond 1. The water supply pipe 17 fixes a plurality of nozzles 18 at a predetermined interval. The nozzle 18 injects pond water supplied from the pump 16 onto the water surface of the ring pond 1 to accelerate the pond water in the ring pond 1 and rotate it along the ring pond 1. The nozzle 18 inclines in the direction in which the pond water of the ring pond 1 flows and injects pond water onto the water surface of the ring pond 1. Both water supply pipes 17 arranged at opposing positions of the culture pond 100 are pond water sprayed from the nozzle 18 and rotate the pond water in the same direction. The water supply pipe 17 is disposed so as to be orthogonal to the ring pond 1. The forced fluidizer 15 having this structure can supply oxygen to the pond water while accelerating the pond water of the ring pond 1 to flow in a certain direction. However, aquaculture ponds do not specify forced fluidizers as described above. This is because the forced fluidizer can have any structure capable of accelerating and flowing the pond water of the ring pond in a certain direction.

  The pond water that is caused to rotate along the ring pond 1 by the forced fluidizer 15 accumulates foreign matter inside the innermost ring pond 1A. In order to discharge foreign matter collected here from the ring pond 1, a drain opening 6 through which the pond water flows is provided inside the bottom of the innermost ring pond 1 A, and a drain pipe 7 is connected to the drain opening 6. ing. The aquaculture pond 100 of FIG. 8 is provided with a drainage ring 8 along the inside of the bottom of the innermost ring pond 1A, and the drainage ring 8 is provided with a drainage opening 6. FIG. 16 is a perspective view showing the drainage ring 8. The drainage ring 8 in this figure is provided with a drainage opening 6 as a groove shape that opens upward. Furthermore, the drainage ring 8 in this figure is divided into a plurality of ring units 8A, and the divided ring units 8A are connected by a connector 9. The drainage ring 8 having this structure can be easily constructed by molding a ring unit 8A having the same shape from plastic and connecting it with a connector 9. The ring unit 8A has a shape that curves to a radius of curvature along the inside of the innermost ring pond 1A, and is formed into a groove shape that opens upward. Further, the ring unit 8A can be easily connected by inserting the connecting portion 8a into the cylindrical connecting device 9 and connecting the connecting portion 8a inserted into the connecting device 9 into a cylindrical shape. In particular, the ring unit 8A and the connector 9 can be easily connected by molding them with plastic and bonding them with an adhesive. The drainage ring 8 of this structure uses cheese that connects three pipes in a T-shape for the connector 9, and connects the ring unit 8 </ b> A and the drain pipe 7 to the connector 9, The drain pipe 7 can be easily connected.

  The structure having the drainage opening 6 on the upper side by the groove-shaped drainage ring 8 can quickly discharge foreign matters collected inside the innermost ring pond 1A. However, the aquaculture pond does not specify the drain opening provided in the innermost ring pond in this structure. For example, a structure in which a plurality of drain openings are provided along the inner periphery of the bottom of the innermost ring pond, and a drain pipe is connected to each drain opening, and the drain ring can be a pipe having a large number of through holes. Further, the bottom surface of the innermost ring pond can be formed into a grooved shape along the inner periphery, and a drain opening can be provided in the groove to connect the drain pipe.

  The structure in which the drainage opening 6 is largely opened can quickly discharge the foreign matter collected inside the innermost ring pond 1A. However, if the fish to be bred is small relative to the drain opening, the fish may enter the drain opening or be damaged by the drain opening. Therefore, the aquaculture pond 100 has a net member 19 disposed in the drain opening 6 as shown by a chain line in the partially enlarged cross-sectional view of FIG. 9 to prevent fish to be bred from entering the drain opening 6. Can do. The netting material 19 is a netting material that can pass foreign substances to be collected but cannot pass fish to be bred. In addition, the structure in which the drainage ring is a pipe having a large number of through holes can prevent the intrusion of the fish by setting the size of the through holes opened in the pipe to a size that allows passage of foreign substances but not of fish.

  As shown in FIG. 10, the drain pipe 7 is embedded in the bottom of the ring pond 1 and pulled out to the outside, and an upright portion 7 </ b> A is provided in the external leading portion. The upright part 7A drains pond water from the upper end opening 7a to control the water surface level of the pond water. Since the water level of the pond water is substantially equal to the level of the upper end opening 7a of the upright portion 7A, the water surface level of the ring pond 1 can be controlled by adjusting the vertical position of the upper end opening 7a of the upright portion 7A.

  The raised portion 7A shown in FIG. 10 is provided with an adjusting portion 29 for controlling the water surface level of the pond water so that the height of the upper end opening 7a can be adjusted. The adjustment portion 29 shown in the figure includes a connecting cylinder 29A connected to the upper end of the upright portion 7A, and an adjusting cylinder 29B connected to the upper side of the connecting cylinder 29A so as to be detachable. The adjusting portion 29 having this structure can adjust the height of the upper end opening 7a by the length of the adjusting tube 29B connected to the connecting tube 29A. In other words, the adjusting portion 29 can shorten the length of the adjusting tube 29B connected to the connecting tube 29A, lower the upper end opening 7a, that is, lower the water level of the pond water, and connect to the connecting tube 29A. The length of the adjustment cylinder 29B can be increased to increase the upper end opening 7a, that is, to increase the water level of the pond water. The adjustment part 29 of this structure is a very simple structure, and can freely adjust the water surface level of pond water. However, although the upright portion is not shown, the height of the upper end opening can be freely adjusted as a double cylinder structure that can be expanded and contracted.

  The pond water drained from the drain pipe 7 is stored in the drain tank 26. The upper end opening 7 a of the drain pipe 7 is inside the drain tank 26, and pond water drained from here is stored in the drain tank 26. The pond water flowing from the drain pipe 7 into the drain tank 26 is supplied to the septic tank 28 by the pump 27. The septic tank 28 physically filters the pond water supplied from the pump 27 and further biologically filters the pond water into clear pond water. The pond water clarified in the septic tank 28 is further sucked into the pump 16 and sent to the water supply pipe 17. The water supply pipe 17 jets the supplied pond water vigorously from the nozzle 18 and forces it to flow along the ring pond 1. The aquaculture pond 100 shown in the figure has a drainage opening 6 → drainage pipe 7 → drainage tank 26 → pump 27 → septic tank 28 → pump 16 → supply of pond water from the ring pond 1 inside the innermost ring pond 1A. Circulate from pipe 17 to ring pond 1 and keep it clear. Moreover, the pond water to circulate is injected from the nozzle 18, and the pond water is forced to flow. However, the aquaculture pond can be structured so that the pond water drained from the drainage pipe is not circulated to the outside, and no septic tank is provided, and the pond water clarified in the septic tank is jetted from the nozzle. It can also be circulated to the ring pond.

  2, 8, and 9, the crossing material 20 is disposed above the ring pond 1 so as to cross each ring pond 1, that is, to bridge the ring pond 1. . The crossing material 20 in the figure is a working step board 21 and a water supply pipe 17 of a forced fluidizer 15 that injects water into the ring pond 1 to accelerate and flow the pond water. Although the crossing material 20 is not specified to these members, if there is the crossing material 20 regardless of the application, the fish in the ring pond 1 is damaged. This is because fish swimming against the flow of the ring pond 1 jumps from the surface of the water and collides. The crossing material 20 kills most fish that have collided here.

  In order to eliminate the above adverse effects, as shown in FIGS. 2 and 8, a strip-shaped soft material 22 is disposed extending in the downstream direction from the lower surface of the cross material 20. The strip-shaped soft material 22 shown in the figure is a flexible sheet 22A that is not damaged even when a fish collides. As shown in FIG. 17, the flexible sheet 22 </ b> A has one end fixed to the lower surface on the upstream side of the crossing material 20, and the other end extended in the downstream direction of the crossing material 20 and floated on the water surface. Yes. As shown in FIG. 17, the flexible sheet 22 </ b> A is floated on the surface of the water by flowing the downstream end toward the pond water flow direction. Further, the flexible sheet 22A disposed on the cross member 20 that is the water supply pipe 17 is accelerated so that the pond water sprayed from the nozzle 18 is supplied to the upper surface and flows through the pond water in a certain direction. Rotate to Since the fish swims against the flow of the ring pond 1, the fish that jumps up to the water surface jumps from the right side to the left side in FIG. 17. At this time, under the flexible sheet 22A, the fish that is about to jump onto the water surface collides with the lower surface of the flexible sheet 22A and falls into the water as shown by the arrow A in the figure, and intersects. Collision with the material 20 is prevented. Further, on the downstream side of the flexible sheet 22A, the fish jumping along the water surface falls to the upper surface of the flexible sheet 22A as shown by the arrow B in the figure. This fish is shown in FIG. In addition, the water passes through the slit 22a provided in the flexible sheet 22A and returns to the water, or the water is ejected from the nozzle 18 of the forced fluidizer 15 in the downstream direction and returned to the water. For this reason, it is prevented that the fish which jumps up against a flow collides with the crossing material 20, and is damaged.

  The flexible sheet 22A in FIG. 18 has a curved shape along the inner surface of the ring wall 2 on both sides so that the flexible sheet 22A can float on the ring pond 1 along the pond water flow. Furthermore, in the illustrated flexible sheet 22A, a plurality of rows of slits 22a are opened from the downstream end to the middle in order to return the fish on the upper surface to the water. When the fish rides on the upper surface, the slit 22a expands as shown by a chain line in the figure, and passes the fish from the upper surface to the lower surface of the flexible sheet 22A to return it to the water. However, although not shown, this slit can be extended to the downstream edge and opened to make the entire shape of the flexible sheet into a good shape. The flexible sheet 22A is longer than the distance that the jumped fish advances on the water surface so that it can prevent the fish jumping from the water surface from colliding with the crossing material 20, for example, 2 to 5 times the body length of the fish. As a matter of fact, the tip portion is floated along the flow of pond water.

  In the above culture device, the bubble injector 61 and the recovery container 62 are disposed in the intake pond 5, but in the fish culture device that does not swim at high speed, the bubble injector and the recovery container are disposed in the ring pond. be able to. In addition, the present invention does not specify a culture pond as a ring pond, but a bubble injector and a recovery container are provided in a culture pond having a square shape, a circular shape, or an oval shape, for example. The oxygen concentration can also be increased.

It is a top view of the fish culture apparatus which this inventor developed previously. 1 is a perspective view of a fish farming apparatus according to an embodiment of the present invention. It is a schematic sectional drawing of the oxygen supply apparatus of the fish culture apparatus shown in FIG. FIG. 4 is a plan view of the oxygen supply device shown in FIG. 3. It is a schematic sectional drawing which shows another example of an oxygen supply apparatus. It is a schematic sectional drawing which shows the use condition of the oxygen replenishment apparatus shown in FIG. It is a schematic sectional drawing which shows the use condition of the oxygen replenishment apparatus shown in FIG. It is a schematic plan view of the fish culture apparatus shown in FIG. It is a schematic sectional drawing equivalent to the AA line cross section of the fish culture apparatus shown in FIG. It is a schematic sectional drawing equivalent to the BB line cross section of the fish culture apparatus shown in FIG. It is a perspective view which shows the water-permeable division material of the fish culture apparatus shown in FIG. It is a disassembled perspective view of the water-permeable division material shown in FIG. It is a vertical sectional view of the water-permeable partition material shown in FIG. It is an expanded sectional view which shows the connection structure of the opening part of a ring wall, and a water-permeable division material. It is a perspective view which shows an example of a pick-up tool. It is a perspective view which shows an example of a drainage ring. It is sectional drawing which shows the soft material of the aquaculture apparatus shown in FIG. It is a top view of the soft material shown in FIG.

Explanation of symbols

1 ... Ring pond 1A ... Innermost ring pond
1B ... Intermediate Ring Pond
1C ... Intermediate ring pond
1D ... outermost ring pond 2 ... ring wall 2A ... outer ring wall 3 ... opening 3A ... side edge
3B ... Side edge 4 ... Water-permeable partition material 4A ... Desorption part 5 ... Take pond 6 ... Drain opening 7 ... Drain pipe 7A ... Upper part
7a ... opening 8 ... drainage ring 8A ... ring unit
8a ... connecting part 9 ... connecting tool 10 ... lifting tool 10A ... mounting part
DESCRIPTION OF SYMBOLS 10B ... Pull-up part 11 ... Sheet material 12 ... Bottom sheet 13 ... Water flow net 14 ... Rod 15 ... Forced fluidizer 16 ... Pump 17 ... Water supply pipe 18 ... Nozzle 19 ... Net material 20 ... Crossing material 21 ... Step board 22 ... Soft Material 22A: Flexible sheet
22a ... slit 23 ... concrete concrete 24 ... bottom plate 25 ... concrete 26 ... drainage tank 27 ... pump 28 ... septic tank 29 ... adjustment part 29A ... connecting cylinder
29B ... Adjusting cylinder 30 ... Grid 31 ... Horizontal rod 32 ... Vertical rod 33 ... Spacer cylinder 34 ...… 35 ... Male screw 36 ... Nut 37 ... Rotating pipe 38 ... Groove-shaped connecting member 39 ... Set screw 40 ... Hinge 41 ... Roller 52 ... curved wall 54 ... opening / closing guide 54A ... desorption part 60 ... oxygen replenishing device 61 ... bubble injector 62 ... recovery container 63 ... pressurizer 64 ... oxygen supply source 64A ... oxygen cylinder 65 ... supply valve 66 ... oxygen concentration sensor 67 ... liquid Surface sensor 70 ... opening 71 ... peripheral wall 72 ... float 91 ... ring pond 100 ... aquaculture pond

Claims (11)

A bubble injector (61) that injects pressurized oxygen in the form of bubbles into the water of the aquaculture pond (100) and a bubble injector (61) disposed on the water surface of the aquaculture pond (100). A recovery container (62) that recovers oxygen that has been jetted into the water surface from the lower opening (70) and pressurizes the oxygen recovered in the recovery container (62) to the bubble injector (61). A pressurizer (63) for supplying, and an oxygen supply source (64) for supplying pressurized oxygen to the bubble injector (61),
Pressurized oxygen is supplied from the oxygen supply source (64) to the bubble injector (61), and oxygen injected in the form of bubbles from the bubble injector (61) into water is recovered in the recovery container (62). A fish culture device in which the recovered oxygen is supplied to the bubble injector (61) by the pressurizer (63) and injected into the water of the culture pond (100).   The fish culture apparatus according to claim 1, wherein the pressurizer (63) is a compressor.   The liquid level sensor (67) for detecting the liquid level of the recovery container (62) is provided, and the liquid level sensor (67) controls the pressurizer (63) to set the liquid level of the recovery container (62) to a predetermined level. The fish culture apparatus according to claim 1, which is controlled within a range.   The fish culture apparatus according to claim 1, further comprising a supply valve (65) for controlling a supply amount of oxygen supplied from the oxygen supply source (64) to the bubble injector (61).   The aquaculture pond (100) compulsorily uses the ring wall (2) provided with an annular ring pond (1) having a predetermined width and the pond water of the ring pond (1) provided between the ring walls (2). A forced fluidizer (15) that flows into the ring pond (1), and a fish intake pond (5) that is disposed outside the ring pond (1) and in which the pond water of the ring pond (1) is circulated. The fish culture apparatus according to claim 1, wherein the bubble ejector (61) is disposed in the apparatus.   The intake pond (5) is arranged in parallel adjacent to the ring pond (1), and the forced fluidizer (15) directs the pond water of both the intake pond (5) and the ring pond (1) in the same direction. The fish culture apparatus according to claim 5, wherein the fish culture apparatus is fluidized.   6. The fish culture apparatus according to claim 5, wherein the width of the intake pond (5) is narrower than that of the ring pond (1).   A curved wall (52) is provided outside the outer ring wall (2A) of the ring pond (1) in parallel with the outer ring wall (2A), and between the curved wall (52) and the outer ring wall (2A). The fish culture apparatus according to claim 5, wherein the take-up pond (5) is provided in the pond.   An opening / closing guide (54) is provided at the connecting portion of the intake pond (5) with the ring pond (1), and the open / close guide (54) is opened to collect the fish in the ring pond (1). 6. The fish culture apparatus according to claim 5, wherein the fish culture apparatus is guided to 5).   Both ends of the intake pond (5) are connected to the ring pond (1), and an open / close guide (54) is provided at the connecting portion at both ends of the intake pond (5), and one open / close guide (54) Open the ring pond (1) to the upper pond (5) and open the other open / close guide (54) to return the fish in the upper pond (5) to the ring pond (1). The fish culture apparatus according to claim 9.   The fish farming device according to claim 9, wherein the open / close guide (54) has water permeability that allows the fish to pass through the pond water.

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