JP2660678B2 - Floating seawater exchange device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seawater alternator, and more particularly, to a floating seawater alternator in which seawater exchange is actively performed in a depth direction by using overflow water caused by overtopping. It is about.

[0002]

2. Description of the Related Art Conventionally, as means for performing seawater exchange using waves, structures such as embankments are installed to change the direction of the seawater flow, Breakwaters, etc., that promote the use of seawater are widely used.

[0003] By the way, the method of installing a structure as described above is not only restricted by topography and the like, but also requires a large amount of cost and a long construction period. Further, from the viewpoint of seawater exchange in the depth direction, it is not sufficient. Could not be expected. On the other hand, as a means of performing seawater exchange in the depth direction, for example, a method of forcibly sending seawater near the sea surface to the bottom using a power device such as a pump has been attempted, but this method requires a large power device. Problems to be solved were pointed out, such as not only the installation cost but also the associated maintenance management became troublesome.

[0004]

Accordingly, in the present invention,
A stagnation section for overflowing water due to overtopping is provided inside the device body that is formed to float on the sea surface, and a cylindrical overflowing water guide member is slidably arranged in the depth direction at the bottom opening of the stagnation section. At the same time, a weight portion is provided at the lower portion of the cylindrical guide member and is suspended in the sea, and furthermore, is moored and held so that the lower end opening of the cylindrical guide member faces the sea floor at a position separated from the sea floor by a predetermined distance. It is easy to install and can reliably exchange seawater in the depth direction without using a power unit or the like.

[0005] In this case, if the apparatus main body is configured by providing a stagnant portion at a central portion of a circular member having a curved upper surface gradually bulging inward from the peripheral edge, the overflow water flowing into the stagnant portion is provided. The inflow can be performed very reasonably. In addition, if a link member is provided near the bottom opening of the stagnation portion, and the apparatus main body and the cylindrical guide member are connected via this link member, a change in the sea surface due to tide or the like occurs. Also, the distance between the bottom opening of the cylindrical guide member and the sea floor can be suitably maintained.

[0006]

According to the present invention, when waves arrive at the apparatus main body floating on the sea surface, these waves climb over the upper surface of the apparatus main body and flow into the retaining portion as overflow water. The overflowing water that has flowed in is discharged from the lower end opening of the cylindrical guide member as a jet flow toward the sea bottom due to the head difference between the water level at the stagnation portion and the sea surface, and the convection phenomenon caused by the jet flow causes seawater exchange in the depth direction. Is performed. Also,
The overflow water that has flowed into the stagnation section contains a large amount of dissolved oxygen due to disturbance such as breaking waves, and the overflow water containing a large amount of dissolved oxygen is discharged as a jet toward the seabed, so the self-cleaning action of the seawater is also activated. Things.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the floating seawater alternator according to the present invention will be described below in detail with reference to the accompanying drawings.

1 and 2, a floating seawater exchange device 10 according to the present invention comprises a material that floats on the sea surface,
For example, the apparatus main body 12 has a flat circular shape and is formed by using a synthetic resin having a small specific gravity and a required strength. The apparatus main body 12 is formed in a curved bulging shape so that an incoming wave can smoothly pass over the upper surface of the apparatus main body 12, and a stagnant portion 14 for temporarily retaining overflowing water due to the overtopping is provided in a central portion. Are arranged concentrically. In this case, the curved bulging upper surface is set to an appropriate height dimension and a curved bulging shape with respect to the average wave height of the arriving wave, so that overflow water due to overtopping is constantly generated. To be configured.

In this embodiment, the apparatus main body 12 is
The plane shape is circular so that the arriving wave can be effectively overtopped. Of course, any shape such as a polygon can be used as long as the shape allows the overtopping to be performed effectively.

On the other hand, an opening 16 is formed at the bottom of the staying portion 14, and the opening 16 is formed into a cylindrical shape having a predetermined strength by using a non-permeable member such as a synthetic resin sheet. The guide member 18 is provided so that the cylindrical guide member 18 can move in the depth direction. More specifically, a plurality of link members 20 are provided on the peripheral edge of the opening 16, and the upper portion of the cylindrical guide member 18 is pivotally attached to the ends of these link members 20, so that the apparatus body 12 , So that the entire cylindrical guide member 18 can move in the depth direction.

The lower end of the cylindrical guide member 18 has
The weight member 24 is formed in a wide shape having a diameter slightly larger than that of the upper end portion, and a chain member is provided around the lower end opening portion 22. It is understood that by configuring the tubular guide member 18 in this manner, when the floating seawater AC device 10 is floated on the sea surface, the tubular guide member 18 hangs down in the sea with respect to the floating device body 12. Like.

The weight 24 formed by the chain member
And one end of the mooring member 26 is connected to the other end of the mooring member 26, and the other end of the mooring member 26 is connected to mooring means 28 disposed on the seabed G to be moored to prevent drifting of the floating seawater AC device 10. I do. In this case, the mooring member 26 has a length such that the lower end opening 22 of the tubular guide member 18 faces a position about 1 m away from the seabed G in the sea area where the floating seawater exchange device 10 is installed. Set the dimensions,
Even if the sea level changes due to tide, etc., the distance d between the lower end opening 22 of the cylindrical guide member 18 and the sea bottom G is established by the link member 20 interposed between the main body 12 which floats.
(See FIG. 1).

In the floating seawater exchange device 10 according to the present invention having the above-described configuration, the device body 12 floating on the sea surface is provided.
Arrives at the upper surface of the apparatus main body 12 and becomes an overtopping wave, and the overflowing water due to the overtopping flows into the retaining portion 14 as it is. When a height difference (head difference H) is generated between the level of the overflow water flowing into the stagnation portion 14 and the sea surface, the overflow water temporarily stagnates from the lower end opening 22 of the cylindrical guide member 18 due to the pumping action. It is discharged toward the seabed as a jet flow, and is replaced with seawater near the seabed, so that seawater exchange in the depth direction as shown in FIG. 1 is performed.

Since the overflow water flowing into the stagnation portion 14 contains a large amount of dissolved oxygen due to the disturbing action of breaking waves, the overflow water is discharged from the lower end opening 22 as a jet flow toward the sea floor. It mixes with seawater near the seabed, and as a result, the self-purifying action of seawater is activated. Even if the sea level changes due to tide or the like, the link member 20 inserted between the apparatus main body 12 absorbs the change in the water level, so that the lower end opening 22 of the cylindrical guide member 18 and the sea bottom G are separated. The distance d is preferably maintained, and the jet flow from the lower end opening 22 is discharged in the same state toward the sea bottom, so that the seawater exchange and the purifying action in the depth direction are reliably performed.

Furthermore, since the surface layer of seawater is generally higher in temperature than the bottom layer, so-called a density stratification is formed, the AC in the depth direction is usually small, but the floating type seawater AC apparatus 10 according to the present invention is used. In the above, the surface water having a high temperature is temporarily retained in the retaining portion 14 as overflow water, and the overflow water having the high temperature is discharged into the low-temperature bottom water through the lower end opening 20 by a pumping action. It is destroyed and a convection phenomenon occurs, and seawater exchange in the depth direction is suitably performed.

[0016]

As described above, according to the floating seawater alternator according to the present invention, since the structure is simple without using a power unit or the like, the installation cost is low and the maintenance cost is low as compared with the conventional one. Management can be performed easily.

Further, the overflow water is temporarily discharged from the lower end opening of the cylindrical guide member toward the sea bottom by utilizing the head difference between the overflow water temporarily staying in the stay portion and the sea surface. Not only can convection occur and seawater exchange in the depth direction can be ensured, but also overflow water contains a large amount of dissolved oxygen, so self-purification of seawater is activated to improve water quality in the sea area. Can be planned.

Furthermore, since the distance between the lower end opening of the cylindrical guide member and the sea bottom is kept constant, it is not affected by changes in the sea level due to tides and the like, and therefore, the overflow water is always ejected as a jet flow. , And has various advantages such as stable seawater exchange in the depth direction.

Although the preferred embodiment of the floating seawater exchange device according to the present invention has been described above, the present invention is not limited to this embodiment. For example, the cylindrical guide member is formed of a hard member. Or various configurations within a range not departing from the spirit of the present invention, such as connecting the main body of the apparatus and the cylindrical guide member via a cylinder mechanism so that the cylindrical guide member is movable in the depth direction. Of course, design changes can be made.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a preferred embodiment of a floating seawater exchange device according to the present invention.

FIG. 2 is an explanatory plan view of the floating seawater exchange device shown in FIG. 1;

[Explanation of symbols]

10 seawater exchange device, 12 device body,
14 stay part, 16 bottom opening part, 18 cylindrical guide member, 20 link member, 22 lower end opening part,
24 weight part, 26 mooring member, 2
8 Mooring means,

Claims (3)

(57) [Claims] 1. An apparatus main body formed so as to float on the sea surface, a stagnation section for overflow water caused by overtopping is provided inside the apparatus body, and a cylindrical overflow water guide member is provided at a bottom opening of the stagnation section. It is disposed so as to be movable in the depth direction, and a weight portion is provided at a lower portion of the cylindrical guide member so as to hang down in the sea, and further, a lower end opening of the cylindrical guide member at a position separated from the sea floor by a predetermined distance. A floating seawater alternator characterized in that a mooring part is held so that the part faces the seabed. 2. The apparatus body according to claim 1, wherein the apparatus main body is formed of a circular member having a curved upper surface which gradually expands inward from a peripheral edge, and a stagnation portion of overflow water is provided at the center of the circular member. The floating seawater exchange device as described. 3. The apparatus according to claim 1, wherein a link member is provided on the periphery of the bottom opening of the staying portion, and the apparatus main body and the cylindrical guide member are connected via the link member. Floating seawater exchange device.