JP2002223661A - Rearing equipment for fish-and-shellfish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rearing equipment for fishes-and-shellfishes which does not cause a water-stagnant or water-immobile zone in the raising water tank even without using a machine such as a pump, thereby securing uniform water flow and favorable feeding. SOLUTION: This rearing equipment has the following construction: a diffusive tube 3 is installed thereinside to induce aeration at the bottom of a water tank 1 whose bottom shape is made spherical or conical, the upper part of the diffusive tube 3 is equipped with a cylindrical flow guide tube 4 to provide the outside of the flow guide tube 4 as a raising site 6 in the water tank 1, and there is additionally provided a feeding device 10 set with a filter mesh 11 in the water tank 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breeding apparatus for shellfish, fish, shellfish and other fish and shellfishes.

[0002]

2. Description of the Related Art Conventionally, when breeding shellfish, a square or round-bottomed water tank is used to inject seawater or freshwater, and air is supplied for air circulation. The breeding was done by that.

[0003]

However, in the square or round bottom type water tank of the conventional method, a stagnant area or a water stoppage area (stagnation) where the flow in the water tank is not uniform is always generated.

[0004] When breeding by feeding a substance having no swimming ability, such as artificial feed, as food, the food is surely stored in the stagnation area or water stoppage area (stagnation).
The amount of feeding by shellfish will be greatly reduced compared to the amount of food actually given.

[0005] In addition, feces and the like also accumulate in the place, causing the water quality environment in the breeding aquarium to be significantly deteriorated, and breeding is difficult.

On the other hand, in order to eliminate such a stagnation area or water stoppage area (stagnation), a forced flow is created by using a machine such as a pump. There are restrictions on the size and installation location, and the running cost is too high.

[0007] In particular, regarding the breeding of bivalves, it is necessary to stop the water supply to the inside of the water tank immediately after feeding in order to prevent the outflow of the bait of the shellfish. The deterioration of water quality becomes remarkable due to the decay of remaining bait and excreta from bivalves.

[0008] When feeding bivalves artificial feed, the feed is often fed once and put into a water tank as it is. As a result, there may be too much food or too large particles in the food.In this case, due to the physiology of the shellfish, feeding may be stopped or the amount of food taken into the digestive tract may be reduced. Is extremely reduced, resulting in stagnant growth and death.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art and to prevent a stagnation area or a water stop area in a breeding aquarium from being generated without using a machine such as a pump. It is an object of the present invention to provide a breeding device for fish and shellfish which can be secured and can be suitably fed.

[0010]

According to the present invention, in order to achieve the above object, a water tank for providing air diffusion by providing a diffuser tube therein has a spherical or conical bottom surface.
A tubular guiding tube is disposed above the aeration tube, the outside of the guiding tube is used as a breeding place in the water tank, and a feeding device provided with a filter mesh is attached to the water tank. The point is that a diffusion plate is disposed on the upper part of the device, and that the diffusion plate has an inverted conical shape.

According to the first aspect of the present invention, since the bottom of the water tank has a spherical shape or a conical shape, a stagnation angle on the bottom surface can be eliminated, and a stagnation area or a water stop area is eliminated. In addition, by installing a cylindrical conduit in the water tank, the ascending flow due to the aeration by the diffuser and the downward flow, which is the compensation flow generated by the aeration, are separated by this conduit, and the vertical water flow inside the water tank is circulated. Can be promoted.

In addition, since the feeder provided with the filter mesh is attached to the water tank, the feed is finely crushed by the filter mesh of the feeder, and the feed is gradually fed. Or even none at all. The filter mesh allows the feed to be selectively provided, for example, with an optimum particle size for shellfish and to prevent a sharp rise in concentration.

According to the second aspect of the present invention, in addition to the above operation, the upward flow generated by the aeration by the diffusion plate is radially diffused in the water surface direction to accelerate the initial flow velocity of the downward flow which is the compensation flow. be able to.

According to the third aspect of the present invention, in addition to the function of the second aspect, the vertical circulation inside the water tank can be more effectively promoted by forming the diffusion plate into an inverted conical shape. .

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing one embodiment of the breeding apparatus for fish and shellfish of the present invention, wherein 1 is an aquarium for breeding.

The water tank 1 has a bottom plate 2 having a spherical or conical bottom surface, a ring-shaped air diffusion tube 3 for causing air reeration is provided on the bottom plate 2, and a cylindrical flow guide tube 4 is provided above the air diffusion tube 3. Was arranged.

The outside of the flow guide tube 4 in the water tank 1 is, for example, a breeding place 6 for shellfish 5, and a canopy type diffusion plate 7 is disposed above the flow guide tube 4. The diffusion plate 7 may be a flat disk, but preferably has an inverted conical shape. In the figure, reference numeral 8 denotes a drain pipe, which has an open end through the diffusion plate 7, passes through the flow guide pipe 4, penetrates through the bottom plate 2, and projects downward.

As an example, the water tank 1 is housed in the housing 9, and the opening of the drain pipe formed by the diffusion plate 7 is located at the upper end of the water tank 1, and drains the overflow water.

Further, a feeding device 10 is attached to the water tank 1,
The feeding device 10 has an air lift pipe 21 from the water tank 1.
As shown in FIG. 2, the feeding device 10 was provided with a filter mesh 11 made of a nylon mesh (several tens to 100 μ mesh) on the bottom of a cylindrical container 12 having an inverted truncated conical bottom.

In the figure, reference numeral 13 denotes a bait feeding device for feeding bait into the cylindrical container 12 and has a timer 14. As shown in FIG. 1, the water supply device 15 for the water tank 1 was also provided with a timer 16.

Next, the usage will be described. The aquarium 1 for breeding is supplied with air and generates a water flow by air diffusion by a diffuser 3, but is separated into an upward flow by an air circulation from the bottom of the water tank and a downward flow which is a compensation flow generated by the air flow from a bottom of the water tank. The vertical water flow circulation inside the water tank 1 is promoted. The shellfish 5 is placed as a breeding place 6 in the downward flow in the vertical water circulation.

The upward flow passing through the conduit 4 hits the diffusion plate 7 and is radially diffused, and the diffusion plate 7 accelerates the initial flow velocity of the downward flow which is a compensation flow.

At predetermined time intervals, food is fed from the food feeder 13 into the cylindrical container 12 of the feeding device 10 and dropped on the filter mesh 11 to feed. The bait that has fallen onto the filter mesh 11 is gradually broken down by the breeding water supplied to the cylindrical container 12 by the air lift tube 21, is supplied through the filter mesh 11 to the inside of the water tank 1, and is fed. By doing so, the shellfish 5 continues to grow.

The water supply to the water tank 1 by the water supply device 15 is also performed by the timer 16 in accordance with the feeding.

FIG. 3 shows a second embodiment of the present invention, in which the water tank 1 is oval. FIGS. 4 and 5 show a case where the breeding device for fish and shellfish of the present invention according to the second embodiment is a land-based aquaculture system. Although illustration of the diffusion plate 7 is omitted in the illustration of the second embodiment, the diffusion plate 7 can be provided as a matter of course.

Conventionally, a water tank 1 is installed on land to avoid the poisoning of shellfish 5 and harmful plankton that are carried out on the sea, and seawater pumped from the sea in a seawater storage tank 17 is supplied to the water tank 1. I made it. In the present embodiment, the air lift pipe 21 to the feeding device 10 is connected to the seawater storage tank 1.
7 to get water.

The shellfish 5 taken out of the water tank 1 is washed in a washing tank 18 before shipping. Further, the wastewater from the water tank 1 and the wastewater from the cleaning tank 18 are guided to a wastewater treatment tank 19, further stored in a sludge treatment tank 20, and treated as sludge.

In the above embodiment, the case where the apparatus of the present invention is used for breeding of shellfish 5 out of seafood and the like has been described. However, the shellfish 5 is not limited to marine shellfish and freshwater shellfish, and may further include sea bream and flounder. It can also be used effectively for rearing crustaceans such as fish, prawns, and thistles. In the case of fish, it is most suitable for larvae in the floating season that eat powdered food.

[0029]

As described above, the breeding apparatus for fish and shellfish of the present invention can prevent the stagnation area or the water stop area in the breeding aquarium from being generated without using a machine such as a pump. A uniform flow can be ensured, and suitable feeding can be performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of a breeding apparatus for fish and shellfish of the present invention.

FIG. 2 is an explanatory diagram of a feeding device part.

FIG. 3 is an explanatory view showing a second embodiment of the breeding apparatus for fish and shellfish of the present invention.

FIG. 4 is an explanatory view showing a second embodiment, in which a breeding apparatus for fish and shellfish of the present invention is a land culture system.

FIG. 5 is a plan view showing a case where the breeding device for fish and shellfish of the present invention is a land culture system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Water tank 2 ... Bottom plate 3 ... Aeration tube 4 ... Conductor tube 5 ... Shellfish 6 ... Breeding place 7 ... Diffusion plate 8 ... Drain pipe 9 ... Housing 10 ... Feeding device 11 ... Filter mesh 12 ... Cylindrical container 13 ... Feeding Container 14 Timer 15 Water supply device 16 Timer 17 Seawater storage tank 18 Cleaning tank 19 Wastewater tank 20 Sludge tank 21 Airlift pipe

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Nobuo Yarase 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Within Kashima Construction Co., Ltd. (72) Inventor Bunkei Hayashi 1-2-chome, Moto-Akasaka, Minato-ku, Tokyo No. 7 F-term in Kashima Construction Co., Ltd. (reference) 2B104 AA22 CA01 CB04 CB17 CB23 DA03 EA05 EB18

Claims (3)

[Claims] 1. A water diffuser tube is provided inside to form a spherical or conical bottom surface of a water tank for causing aeration, and a tubular flow guide tube is disposed above the diffuser tube to conduct a flow in the water tank. A breeding device for fish and shellfish, wherein the outside of the tube is used as a breeding place, and a feeding device provided with a filter mesh is attached to a water tank. 2. The breeding apparatus for fish and shellfish according to claim 1, wherein a diffusion plate is provided above the flow guide tube. 3. The breeding apparatus for fish and shellfish according to claim 2, wherein the diffusion plate has an inverted conical shape.