JP2715253B2 - Upwelling generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upwelling flow generator for transferring lower seawater to a surface layer in an ocean current, a tidal current area, or the like.

[0002]

2. Description of the Related Art In recent years, in a closed inner bay, eutrophication has progressed due to drainage from living, agriculture, industry, etc., and in summer the density has decreased due to an increase in sea surface temperature.
A thermocline occurs and a stratified state occurs. Then, the dissolved oxygen is consumed by the decomposition of the organic matter deposited on the seabed, thereby forming anoxic eutrophic bottom water. When the offshore wind blows in this state, an offshore current is generated, the bottom water rises, causing blue tide and red tide, causing damage such as death of fish and shellfish, which is an environmental problem.

[0003] In the open sea, the deep currents rich in nutrients such as phosphorus and nitrogen rise up to the luminous surface near the sea surface where sunlight reaches by utilizing currents such as the Kuroshio, and phytoplankton is multiplied by the nutrients. However, it has been proposed to form a good fishing ground using the fish as bait. JP-A-61-
JP-A-88831, JP-A-62-32830, JP-A-1-60320, JP-A-2-186927 and the like are examples.

[0004] In these, a block having a tidal current shield, a resistor, and a turning plate are installed as structures which are obstacles to flow on the sea floor. It generates turbulence and eddy currents, causing bottom water to spring up.

[0005]

However, since the bottom water is diffused and diluted throughout the middle and upper layers during the spring flow,
It is difficult to reliably guide the bottom water to the surface layer, and it is also difficult to concentrate and use the bottom water. In addition, for example,
JP-A-233737 and JP-A-59-156231 disclose a configuration in which bottom water is guided to the surface using pipes. Is complicated, the installation is difficult, and the cost is high.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to ensure that bottom water rises to the surface without diffusing or diluting to the middle and upper layers in the course of springing, and has a simple structure and easy installation. It is an object of the present invention to provide an upwelling flow generator which can be manufactured at low cost and can be pumped to land.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly joins a plurality of short cylindrical sheets provided with reinforcing holes at both ends thereof in alignment with the positions of the reinforcing holes. At the same time, a link is fitted to this joint, and the string-shaped member is spirally wound around the link while penetrating the reinforcing hole, and a long length is formed on the outer surface of the flow guide tube formed by sequentially connecting short cylindrical sheets. A mooring line is provided along the vertical direction, a buoy is provided at the upper end of the mooring line, a sinker is provided at the lower end, the inlet at the lower end is opened in the bottom water of the sea floor, and the outlet at the upper end is exposed to the surface water of the luminous surface. Secondly, the mooring line is to be engaged with a link provided in the conduit, and thirdly, a floating frame with a net stretched over a buoy provided at the upper end of the mooring line. Fourth, the link is such that the weight is located at the inlet of the conduit and the weight is located at the outlet. It is an gist in that a float.

[0008]

According to the first aspect of the present invention, the buoy provided at the upper end of the mooring line and the sinker at the lower end position the flow guide pipe at a predetermined position from the seabed to the sea surface. Then, due to the momentum of the tidal current, bottom water is taken into the channel from the inlet at the lower end, and is discharged from the outlet at the upper end into the surface water of the luminous surface layer. Thereby, the bottom water can be reliably guided to the surface layer by a simple flow guide tube formed of a cylindrical sheet.

In addition, since the flow guide tube is formed by combining a plurality of short cylindrical sheets with a string-shaped member via the reinforcing hole and the link, the flow guide tube has excellent strength.

According to the second aspect of the present invention, in addition to the above-described operation, the mooring line is fixed to the link, so that the conduit is firmly fixed to the mooring line.

According to the third aspect of the present invention, in addition to the above operation, a floating frame with a net stretched is moored on a buoy provided at the upper end of the mooring line, and bottom water flows into the floating frame. As a result, this can be used as a cage, and the cultivation of useful seaweed and the cultivation of shellfish become possible.

According to the fourth aspect of the present invention, since the inflow port of the flow guide tube is held vertically by the weight provided on the link, the inflow of bottom water can be smoothly performed without reducing the effective area of the inflow port. In addition, the float can prevent the outlet of the flow guide tube from dropping downward, so that the bottom layer water can smoothly flow out without reducing the effective area of the outlet.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing an embodiment of an upwelling flow generating apparatus according to the present invention, and FIG. 2 is a side view of a main part of the same, wherein 1 shows a flow guide tube formed of a cylindrical sheet. A mooring line 2 such as a chain is provided on the outer surface of the device 1 along its length.

In this flow guide tube 1, for example, reinforcing holes 3 are formed at a constant pitch on both sides of a sheet having a predetermined width, cut into a predetermined circumferential length of the flow guide tube 1, and this cut piece is formed into a cylindrical shape. Process into
A plurality of such short cylindrical sheets 1a are sequentially joined by matching the positions of the reinforcing holes 3, and a link 4 is fitted on the outside of the joining portion, and a string-like member 5 such as a nylon rope is inserted into the reinforcing holes. 3, spirally wound around the link 4, and the short cylindrical sheets 1 a were sequentially connected to form a long sheet. (Actually, the row of holes is invisible on the back side of the link 4, but is shown in a shifted manner in FIG. 2 for easy understanding.)

As shown in FIG. 2, in the case of a single string-like member 5 as shown in FIG. 2, every other string-like member 5 coming out of the reinforcing hole 3 is connected to every other reinforcing hole 3. Although not shown, it is also conceivable to use two cord members 5 so that the cord members 5 come out of all the reinforcing holes 3 and are spirally wound around the links 4. Can be

Then, the top end of the link 4 located in the back muscle portion of the flow guide tube 1 is fixed to the mooring line 2 using a fastener 13 such as creep, and a buoy 6 is attached to the upper end of the mooring line 2 and the lower end is Is provided with a sinker 7 via a universal joint 14, and the end of the flow guide tube 1 on the side where the sinker 7 is provided is connected to the inlet 1
b, and the end on the side where the buoy 6 is provided is an outlet 1c.

Further, of the links 4, the weight 8 is provided at the inlet 1b of the flow guide tube 1 and the float 9 is provided at the outlet 1c.

A buoy 6 provided at the upper end of the mooring line 2
The floating frame 11 on which the net 10 is stretched is moored by the mooring rope 12.

Next, usage and operation will be described. The length of the diversion tube 1 and the mooring line 2 is set to be about twice as long as the water depth to the seabed where the diversion tube is to be installed, the sinker 7 is submerged on the seabed, and the buoy 6 is floated on the sea surface. 1 and the mooring line 2 are installed in the sea.

In this state, the diversion tube 1 and the mooring line 2 are about 3
It is installed at an angle of 0 degree, and the lower part of the inflow port 1b is pulled downward by the weight 8, so that the inflow port 1b is opened vertically at a substantially right angle to the flow direction of the ocean current, and The outlet 1c is opened obliquely upward at a right angle to the length direction of the flow guide tube 1 by the float 9.

Further, even when such a channel 1 is installed in a sea area where the ocean current turns, the mooring line 2 is connected to the sinker 7 via the universal joint 14, so that the buoy 6
Turns around the sinker 7, and the mooring line 2 does not twist. Further, the flow guide tube 1 includes a reinforcing hole 3 and a link 4.
A plurality of short cylindrical sheets 1 by a string-like member 5 through
Since they are formed by combining a, they are also excellent in strength.

The seabed bottom water enters the inlet 1b due to the seabed flow, is taken into the conduit 1, and rises from the outlet 1c at the upper end to the lighted surface layer. During this time, the bottom water rises in the flow guide tube 1, so that it can be surely guided to the surface without being diffused and diluted into the middle and upper layers in the course of the rising.

Further, the net 10 is connected to the buoy 6 with a mooring rope 12.
By mooring the floating frame 11 on which is stretched, bottom water flowing out from the outlet 1c can be taken into the floating frame 11,
Due to the rich nutrients contained in the bottom water, useful seaweeds such as laver and kelp in the floating frame 11 and shellfish 16 such as scallops and oysters
Aquaculture is also possible.

The remaining nutrients that have passed through the floating frame 11 spread widely on the sea surface, breed phytoplankton, promote the food chain, and can breed fish and shellfish.

The floating frame 11 is evacuated by separating from the buoy 6 during stormy weather such as a typhoon.

By installing a submersible pump in the vicinity of the outlet 1c, bottom water can be taken from the outlet 1c, and utilization and research on bottom water on land become possible.

[0027]

As described above, the upwelling flow generator according to the present invention can surely guide the bottom water to the surface layer with a simple conduit formed of a cylindrical sheet as long as it flows to the seabed. It is lightweight, excellent in strength, low in construction cost, can be installed in both inside and outside seas, and is easy to install, move and remove.

In addition, the bottom water can be used as a cage by flowing the bottom water into the floating frame, which enables the cultivation of useful seaweed and the cultivation of shellfish, and also has a function of purifying seawater and forming a fishing ground.

Further, the weight and the float provided on the link make it possible for the bottom water to flow in and out smoothly without reducing the effective area between the inlet and the outlet of the conduit.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an upwelling flow generator according to the present invention.

FIG. 2 is a side view of a main part showing an embodiment of the upwelling flow generating device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lead pipe 1a ... Cylindrical sheet 1b ... Inlet 1c ... Outlet 2 ... Mooring line 3 ... Reinforcement hole 4 ... Link 5 ... String member 6 ... Buoy 7 ... Sinker 8 ... Weight 9 ... Float 10 ... Net 11 ... Floating frame 12 ... Mooring rope 13 ... Fastener 14 ... Universal joint 15 ... Useful seaweed 16 ... Useful shellfish

Claims (4)

(57) [Claims] 1. A plurality of short cylindrical sheets provided with reinforcing holes at both ends are sequentially joined by matching the positions of the reinforcing holes, and a link is fitted to the joining portion so that the string-like member is inserted into the reinforcing holes. A mooring line is provided along the length direction on the outer surface of the flow guide tube formed by sequentially connecting short cylindrical sheets while being spirally wound around the link while penetrating the mooring line, and a buoy is provided at the upper end of the mooring line. ,
An upwelling flow generator, wherein a sinker is provided at a lower end, an inlet at a lower end is opened into bottom water on the sea floor, and an outlet at an upper end is opened into surface water on a lighted surface layer. 2. The upwelling flow generating device according to claim 1, wherein the mooring line is engaged with a link provided in the conduit. 3. The upwelling flow generator according to claim 1, wherein a floating frame having a net stretched is moored on a buoy provided at an upper end of the mooring line. 4. The upwelling flow generating device according to claim 1, wherein the link is provided with a weight at the inlet of the flow guide tube and a float at the outlet.