JP2001095421A - Aquarium for cultivation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems of a fish body being injured by colliding with another fish body or a wall by being let flow by a rotating flow, because the water in a cultivation aquarium in the same amount without the distinction of day and night is cleaned and circulated because the water becomes dirty by the excrements or the like of the fish, the rotational flow is rotated in the aquarium without the distinction of the day and the night when the water is used for the rotational flow, and although the fish swims in the rotating flow at daytime, the fish stops and sleeps at the night. SOLUTION: A nozzle pipe for pouring the circulating water into the aquarium is formed so as to be freely turned around an axis center in the vertical direction so that the circulating water may be gushed in the tangent direction of a vertical wall of the aquarium in the daytime, and the water may be gushed in the right-angled direction to the tangent direction at the night.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a fish aquaculture tank,
In particular, the present invention relates to a culture tank for purifying and circulating water in a tank.

[0002]

2. Description of the Related Art Conventionally, in fish farming, it has been practiced to try to make fish taste closer to natural fish in an environment closer to nature. For example, JP-A-58-2
Japanese Patent Application Publication No. 05440 discloses that a circulation path having a built-in impeller is connected to a water tank, and a water stream is caused to flow in the water tank to force the fish to swim so that the taste of the fish is close to that of a natural fish. I have.

[0003] In addition, in a fish culture facility, a water circulation system is widely used in which water in an aquarium is contaminated with fish droppings, bait, and the like, so that the water is purified through a purification device and then returned to the aquarium again. The water to be returned is pressurized to some extent by a circulation pump and injected into a water tank using an appropriate nozzle. Japanese Utility Model Publication No. 2-3056 discloses an aquaculture facility for injecting the above-mentioned return flow into a circular or polygonal water tank in a substantially tangential direction to the wall of the water tank to generate a swirling flow.

[0004]

The water in the aquarium is contaminated with fish droppings, so that almost the same amount of water is purified and circulated without any distinction between day and night. The swirling flow is circulating in the water tank without distinction. However, the fish swim in the swirling flow during the daytime, but at night, they stay still and sleep, so they are swept away by the swirling flow in that state.As a result, the fish collide with each other or hit the wall of the aquarium. The fish could be hurt by collisions.

[0005] Accordingly, an object of the present invention is to improve the above-mentioned drawbacks and to provide an aquaculture tank without damaging the fish.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a culture water tank having a nozzle pipe for injecting circulating water into a water tank, wherein the direction of injection of the circulating water can be freely changed. In a culture tank including a nozzle pipe for injecting into a tank, the nozzle pipe is characterized by being rotatable with respect to an axis in a direction of a vertical wall of the water tank, and the nozzle pipe is provided on a vertical wall of the water tank during daytime. On the other hand, the circulating water is spouted in a substantially tangential direction, and at night, the circulating water is spouted in a direction substantially perpendicular to the tangential direction. Further, the nozzle tube is rotated by a set time signal of a timer or a signal of an optical sensor for detecting the brightness around the water tank.

In the daytime, circulating water is jetted substantially tangentially to the standing wall of the water tank, so that the water in the water tank circulates in the water tank as a gentle swirling flow. Since the fish swim in the swirling flow, they perform the same motion as in the sea, and can prevent the adverse effects due to lack of motion. At night, the fish sleeps while standing still in the water.At this time, if there is a swirling current, the fish is swept through the aquarium following this flow, and the fish body is damaged by collision between fish or collision with the wall of the aquarium. I had it.

[0008] Therefore, in the present invention, the circulating water is spouted substantially in the diameter direction of the water tank at night to suppress the swirling flow and to minimize the above-mentioned problems.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the aquaculture tank of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is an elevation view thereof, and FIG. 3 is a view taken along the line AA of FIG. In the figure, reference numeral 1 denotes a water tank having a predetermined volume and standing wall 1-1.
The shape is octagon in this embodiment, but may be other polygons or circles. At a substantially central portion of the water tank 1, there is provided a residual food discharge port 2 for discharging feces, residual food, and water.
And is fixedly disposed substantially vertically along. A solid-liquid separator (not shown) is provided at the end of the remaining food discharge port 2 to separate the remaining food from water. The water is sent to a purification device (not shown) to be purified and added with oxygen. The pressure is fed by a circulating pump (not shown), and is returned from the nozzle pipe 5 into the water tank 1 via the return pipe 4.

A joint 6 is attached to the end of the return pipe 4, and a nozzle pipe 5 is attached to the joint 6. The joint 6 may have an existing structure as long as the joint tube 6 can rotatably hold the nozzle tube 5 and maintain a proper watertightness. The lower portion of the nozzle tube 5 is supported by a receiving seat 7, and the receiving seat 7 has an existing structure as long as the nozzle tube 5 can hold the nozzle tube 5 rotatably and maintain appropriate watertightness similarly to the join 6. Is fine. A plurality of nozzle holes 8 are formed in the nozzle pipe 5 in the vertical direction, and circulating water is jetted into the water tank 1 from the nozzle holes 8. An arm 9 for rotating the nozzle tube 5 is fixedly mounted on the upper portion of the nozzle tube 5.

A tail portion of the electric cylinder 11 is pivotally mounted on a cylinder bracket 10 attached to the vertical wall 1-1 of the water tank 1 so that the electric cylinder 11 can swing freely in the horizontal direction. A lever 13 is pivotally connected to the cylinder bracket 10 via a pin 12 so as to be swingable in the horizontal direction.
Is connected to the electric cylinder 11, and a rod 14 is pivotally connected to the other end of the lever 13 to connect the rod 14 to the arm 9. With such a link mechanism, the linear movement of the electric cylinder 11 is converted into the rotational movement of the nozzle tube 5. In this embodiment, the electric cylinder is used. However, pneumatic or hydraulic pressure may be used.

Next, the operation of the above configuration will be described. When a swirling flow is caused to cause the fish to swim in the daytime, the lever 13 rotates counterclockwise around the pin 12 by extending the electric cylinder 11 forward, and the arm 9 moves through the arm 14 together therewith. Also rotates counterclockwise. Since the arm 9 is fixed to the nozzle tube 5, the nozzle tube 5 also rotates counterclockwise about its axis, and the circulating water returned from the nozzle hole 8 formed in the nozzle tube 5 is indicated by an arrow. Spouts in the A direction. Since the direction A is set to be substantially tangential to the vertical wall 1-1, the jetted circulating water swirls along the vertical wall 1-1 and induces a swirling flow in the water in the water tank.

When the swirling flow is stopped at night, the operation reverse to that described above is performed, and the circulating water is jetted in the direction of arrow B. Since the direction B is set so as to be directed substantially toward the center of the water tank 1, the circulating water that has been jetted does not make a swirling motion, but causes a small turbulent flow of the water in the water tank 1. By doing so, the fish can rest and sleep in an almost constant place.

A dimmer is installed, and at a set time, the nozzle tube 5 is automatically rotated to a predetermined position in the daytime to generate a swirling flow, and the nozzle tube 5 is moved to a predetermined position in the nighttime to suppress the swirling flow. It can also be rotated, and an optical sensor with a built-in photodiode is installed around the water tank,
It is also possible to determine the daytime or nighttime by detecting the brightness around the water tank and to rotate the nozzle tube 5 based on the signal.

[0015]

As described above, the present invention has the above-described structure and function, so that it does not move the fish unnecessarily when the fish is sleeping at night, and therefore has a low risk of damaging the fish body. An aquarium can be provided.

[Brief description of the drawings]

FIG. 1 is an elevation view of a culture tank according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a view taken along the line AA of FIG. 1;

[Explanation of symbols]

1 water tank, 1-1 vertical wall, 4 return pipe, 5 nozzle pipe, 8 nozzle hole, 9 arm, 11 cylinder, 13
Lever, 14 rod

Claims (3)

[Claims] An aquaculture tank having a nozzle pipe for injecting circulating water into the aquarium, wherein the direction of injection of the circulating water is changeable. 2. The nozzle pipe rotates so as to eject circulating water in a direction substantially tangential to a standing wall of a water tank during daytime and to eject circulating water in a direction substantially perpendicular to the tangential direction at night. The aquaculture tank according to claim 1, wherein: 3. The aquaculture tank according to claim 2, wherein the nozzle tube is rotated by a set time signal of a timer or a signal of an optical sensor for detecting the brightness around the tank.