JPH0339030Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial field of application] This invention relates to a floating water tank that is installed so as to float on a river or sea, and more specifically, it is designed to maintain the water level in the floating water tank at a constant level at all times. Regarding floating water tanks.

[Conventional technology]

Cage cages are used to preserve captured fish alive and to farm them. Generally, such cages are made by installing nets divided into predetermined sizes in rivers or the sea, and allowing surrounding water or seawater to constantly flow into them.However, due to recent pollution of rivers and seas, In cases where the water or seawater at the installation site cannot be used directly and purified water or seawater must be used, or depending on the type of fish, it may be necessary to place the fish in clean water for a while to dislodge mud, etc. When shipping, a closed type water tank is required.

Closed aquariums can be installed on land, but they not only take up space but also require water temperature control, so floating aquariums that float on rivers or the sea are widely used. Such floating water tanks consist of a rectangular, polygonal, or circular floating body that also serves as a side wall around the entire circumference, made of styrene foam, rubber or synthetic resin with a sealed air chamber inside, and the bottom part is reinforced with fibers. It is constructed by fixing a diaphragm made of rubberized cloth. A water tank with a predetermined area is formed by injecting water or seawater into the floating water tank to the same level as the surrounding water surface. However, since the upper part is open, waves may become high due to rain or rough weather, and surrounding water may flow over the side walls and enter the tank. Water pressure can build up and damage the diaphragm or joints, and if the water continues to rise, the tank may become submerged.

To prevent accidents caused by such changes in water level, when the water level in the aquarium exceeds a predetermined level,
Drainage can be done by operating a drainage pump or the like, but this is not only expensive, but also requires securing a place to install the pump.

Therefore, it has been proposed that a relaxing diaphragm is provided in a part of the diaphragm, and the increased water is absorbed by this relaxing diaphragm. Temporary increases in water can be dealt with by installing a relaxing diaphragm, but unless the amount of water increase is constantly monitored, the same dangers as mentioned above will occur if the amount of water increase that cannot be absorbed by the relaxing diaphragm occurs. do. In order to avoid this risk, attempts have been made to provide a buoyancy material smaller than the floating body in approximately the same shape as the floating body, to bond a diaphragm to the top surface of the buoyancy material, and to position the buoyancy material on the bottom surface of the floating body. In this configuration, the diaphragm is pressed against the bottom surface of the floating body by the buoyant force of the buoyancy material, and when the internal pressure increases due to increased water, the increased pressure is used to push and spread the crimped part between the floating body and the diaphragm, allowing the increased amount of water to escape. .

[The problem that the idea aims to solve]

In this method, too, if the diaphragm is thin, it will swell due to water pressure due to increased water, and the buoyancy material will move inward due to the tension, resulting in a situation similar to the above-mentioned relaxing diaphragm, where the increased amount of water may not be able to escape. There is a method of making the diaphragm thicker to prevent this expansion, but in either case, it is necessary to balance the force applied to the diaphragm when the water rises and the buoyancy of the buoyancy material, and accurate settings are required.

Therefore, the purpose of this invention is to provide a floating water tank that can reliably drain increased water using an extremely simple configuration by utilizing external water pressure and changes in water pressure inside the tank due to increased water, and does not normally leak water inside the tank. It is to be.

[Means to solve the problem]

This idea is based on a floating water tank consisting of an annular floating body and a diaphragm fixed to the lower surface of the floating body. The duct has a duct that is pressed open by the external water level when the water level in the floating water tank is at a predetermined level, and is pushed open by the water pressure when the water level in the floating water tank exceeds a predetermined level. It is characterized by being set to discharge.

[Effect]

When the water level in the flotation tank is at a predetermined level, the duct is crushed by the water pressure of the sea or river where it is installed, forming a closed shape, and the water in the tank does not flow away. When the water in the floating tank increases due to rain or waves, the water pressure inside the tank increases, forcing the duct, which had been crushed by external water pressure, to expand, allowing the increased water to flow outside. When the water level in the floating water tank drops to a predetermined level due to this runoff, the duct is closed again by external water pressure to prevent the water from running off.

〔Example〕

Hereinafter, one embodiment of this invention shown in the drawings will be explained. The floating water tank has an annular floating body 1, and this floating body 1 is made of styrene foam, rubber, or synthetic resin having a sealed air chamber inside. There is.
Although the shape is square in this embodiment, it is not limited to this shape, and may be polygonal or circular. A diaphragm 2 made of fiber-reinforced rubberized cloth or a synthetic resin sheet material is attached to the lower surface of the floating body 1 so as to cover the opening of the floating body 1. An opening 3 is formed in the approximate center of the diaphragm 2, and a duct 4 formed in a cylindrical shape made of a synthetic resin such as polyethylene or a flexible thin sheet material such as rubberized cloth is formed on the back side of the diaphragm 2. It is attached so that the upper end communicates with the opening 3. This duct 4 has folded ridges 5 formed in advance on both ends in the diametrical direction,
It is desirable that the surfaces between these folds 5 be curved so that they are pressed together and become flat. Duct 4
A weight 6 made of a lead ingot, a steel chain, or the like is attached to the lower end of the duct 4 so that the entire duct 4 is held suspended in the water. Note that by forming the lower surface of the floating body 1, that is, the diaphragm 2 in the shape of a mortar, the garbage accumulated at the bottom gathers in the center of the diaphragm 2, and when draining water from the duct 4, these garbage can be flushed out first. Possible and preferable.

Therefore, when the water level in the floating water tank is at a predetermined level, the duct 4 becomes flat due to the external water pressure and the downward tension exerted by the weight 6, and the water in the floating water tank is discharged from the duct 4. There isn't. When the water level inside the flotation tank becomes higher than the water level outside as shown in Figure 2 due to rain or waves, the water pressure inside the flotation tank increases, forcing the duct 4 to expand and draining the increased water out of the tank. . On the other hand, when the water level in the floating water tank decreases, the duct 4 is closed by external water pressure and acts as a check valve, as described above. Duct 4
The diameter, length, etc. of the floating tank will be determined by taking into account the volume of the floating tank and the specific gravity of the seawater or river water in which it will be installed. In addition to these conditions for the weight 6, it may be determined by taking into consideration the water flow at the installation location.

In addition, since the opening 3 is located approximately at the center of the diaphragm 2, the center part of the diaphragm 2 is slightly lower than the rest due to its weight due to water pressure, weight 6 of the duct 4, etc. Since fish waste and the like naturally collect, when draining water, these wastes and the like are discharged first, so that the sediment in the floating tank can also be discharged.

The inventor prepared a water tank with a square opening of 150 cm on a side and a depth of 200 cm, and placed a floating body in the shape of a hexagonal prism with a side of 50 cm and a height of 10 cm. An experimental flotation tank with diaphragm 2 attached to the bottom was floated. An opening with a diameter of 5 cm was provided approximately at the center of the diaphragm 2 of the experimental flotation tank, and a 5 cm diameter and length of polyethylene with a thickness of 0.1 cm was placed in this opening.
Install a 65cm cylindrical duct, and 10
G chain weight was installed. When I put water into the aquarium and colored water into the flotation tank, the colored water did not drain into the aquarium until it reached the same level as the water level in the aquarium, and when the colored water in the flotation tank rose above the water level of the aquarium. , it was confirmed that colored water was flowing out of the duct into the aquarium. On the other hand, in order to check the possibility that water in the tank will enter the floating tank,
When we colored the water in the aquarium and placed colorless water in the flotation tank, the colored water in the aquarium did not enter the flotation tank, regardless of the water level in the flotation tank.

[Effect of idea]

As described above, the floating water tank of this invention is provided with a flexible duct extending downward from the drain port on the bottom surface of the diaphragm, and when the water level in the floating water tank is at a predetermined level, the duct is connected to the external water level. Press and close by
When the water level in the floating water tank exceeds a predetermined level, it is pushed open by the water pressure and the water in the floating water tank is discharged, and the water level in the floating water tank can be adjusted to the desired level without the need for a complicated mechanism. can be held. In addition, the duct has folded ridges at both ends in the diametrical direction, and by forming the duct in advance so as to be crimped between the folded ridges, when the water pressure inside the duct becomes lower than the external water pressure, the duct can be easily pressed by the external water pressure. can be used to close the duct.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the floating water tank of this invention, and FIG. 2 is a longitudinal section of the floating water tank in a state where it is floating on the water surface. In the drawings, 1 is a floating body, 2 is a diaphragm, 3 is an opening, 4 is a duct, 5 is an folding pile, and 6 is a weight.

Claims (1)

[Claims for Utility Model Registration] (1) In a floating water tank composed of an annular floating body and a diaphragm fixed to the lower surface thereof, the diaphragm has a drain port, and the lower surface of the diaphragm has a drain port. a flexible duct extending downward from the
When the water level in the floating water tank is at a predetermined level, this duct is pressed against the external water level, and when the water level in the floating water tank exceeds a predetermined level, it is pushed open by the water pressure and drains the water in the floating water tank. A floating water tank characterized in that it is configured to. (2) The floating water tank according to claim 1, wherein the duct has folds at both ends in the diametrical direction, and is formed in advance so as to be crimped between the folds.