JPS6374434A - Sea water pumping up apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a seawater pumping device for pumping nutrient-rich cold water from near the ocean floor to near the sea surface and using it for cultivating seafood and seaweed.

[Prior art and its problems]

In recent years, technology for cultivating fish and seaweed in the ocean has advanced, and the use of cold, nutrient-rich water that exists on continental shelves up to 200 meters deep or near the ocean floor in even deeper waters is attracting attention. In other words, by pumping this cold water up to the aquaculture structure near the sea surface and stirring it, great effects are expected, such as accelerating the growth of marine plants and the proliferation of plankton, as well as promoting the growth of seafood.

By the way, the most common method for pumping seawater from near the ocean floor to near the sea surface is to use a pump, but a power source is required to use a pump, and its cost is an issue. For example, to drive a pump with electricity,
It is necessary to lay a power transmission cable to the pump installed offshore, and in addition to the cost of laying it, there is also the cost of electricity for operation, so it is not possible to achieve this cost-effectively, considering the benefits of pumping up seawater. is difficult.

[Means for solving problems and their effects]

In order to solve the problems of the prior art as described above, the present invention provides a seawater pumping device that does not require a power source.

Natural energy that can be used in the ocean exists in the form of wind, waves, tides, seawater temperature differences, etc., but its energy density is generally low and there is a problem in that it requires large equipment to use. However, wave energy has the highest density and can be said to be the easiest energy to use.

Therefore, the present invention provides a seawater pumping device that uses wave power, and its configuration is such that the lower end of the pipe is anchored to the seabed, the upper end is pulled up by a first buoy, and the pipe is raised in the sea. This allows the lower end of the pipe to be located near the seabed and the upper end near the sea surface, and within the pipe, multiple partition plates that can slide vertically are placed at appropriate intervals, and each partition plate is connected with a tension member. A second buoy floating on the sea surface is connected to the upper end of the tension member, and a weight is suspended from the lower end. is characterized by having a valve mechanism that opens.

According to the above configuration, the pipe is stationary in the sea in an almost upright state, and on the other hand, when the second buoy floating on the sea surface rises from the trough of the wave to the crest of the wave, the buoyancy of the buoy causes the partition plate to move inside the pipe. When the buoy descends from the crest of the wave to the trough, it will descend within the pipe due to the weight of the weight. On the other hand, the valve mechanism installed in the partition plate closes when the partition plate rises and opens when it descends, so as the partition plate moves up and down, the seawater in the pipe gradually moves upwards. It turns out. In this way, seawater near the ocean floor enters from the bottom of the pipe and is pumped up to near the sea surface through the pipe.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In Figure 1, 11 is a pipe placed vertically in the sea;
12 is a perforated flange fixed to the lower end of the pipe 11;
3 is a perforated flange fixed to the upper end of the pipe 11, 14
1 is a chain mooring the lower end of the pipe 11 to the seabed 15;
6 is a first buoy that pulls up the upper end of the pipe 11.

The buoy 16 is located below the sea surface 17 so as not to be affected by waves, and its buoyancy allows the pipe 11, whose lower end is moored to the seabed 15, to rise into the sea. In this way, the lower end of the pipe 11 is located near the seabed 15, and the upper end is located near the sea surface 17.

As the pipe 11, a long pipe connected with a metal pipe such as stainless steel or a long pipe made of a plastic pipe such as nylon or polyethylene reinforced with armored wire as necessary is used.

Next, 18 is a plurality of partition plates arranged at appropriate intervals in the vertical direction within the pipe 11, 19 is a tension member that connects these partition plates 18, and 20 is an upper □ end of the tension member 19. a second buoy attached to,
21 is a weight suspended from the lower end of the tension member 19.

Each partition plate 18 is disk-shaped and can slide smoothly on the inner surface of the pipe 11. second buoy 2
0 is a state in which each partition plate 18 and weight 21 are suspended,
It has sufficient buoyancy so that it always floats on the sea surface 17. In order to obtain sufficient buoyancy, not only one but a plurality of No. 20 buoys 20 may be provided. The weight 21 is used to keep the tension member 19 in a constant state of tension, and is provided at a position where it does not reach the seabed 15 even when it moves up and down.

As the tension member 19, it is desirable to use a material with excellent corrosion resistance, tensile strength, and repeated fatigue properties. An organic material with a strength of 40 kg/mm" or more is suitable. In the illustrated example, one tension member 19 is used, but a plurality of tension members 19 may be used. In particular, each partition plate 18
In order to move up and down while keeping it horizontal, it is desirable to arrange three or more tension members at equal intervals in the circumferential direction.

Further, the tension member 19 does not have to be continuous from top to bottom, and may be connected via the partition plate 18.

A valve hole 22 is formed in each partition plate 18 as shown in FIG. 2, and a valve plate 23 opens and closes the valve hole 22 on the upper surface side.
are hinged. In other words, the valve plate 23 is the partition plate 1
When 8 rises in seawater, water pressure from above closes the valve hole 22, and when it descends, water pressure from below opens the valve hole 22 as shown. A suitable material for the partition plate 18 and the valve plate 23 is FRP or the like.

With the above configuration, when the second buoy 20 moves up and down due to waves, the partition plates 18 move up and down simultaneously within the pipe 11. When the partition plate 18 goes up, the valve hole 22 is closed, so the seawater in the pipe ll rises with it, but when the partition plate 18 goes down, the valve hole 22 is closed.
Since the pipe 11 is opened, almost no seawater moves inside the pipe 11. Therefore, seawater near the seabed 15 that enters the pipe 11 from the lower end of the pipe 11 gradually moves upward in the pipe 11 due to the vertical movement of the partition plate 18, and finally flows from the upper end of the pipe 11 near the sea surface 17. will be released.

〔Effect of the invention〕

As explained above, according to the present invention, nutrient-rich seawater near the seabed can be pumped up to the sea surface at low cost using wave energy, contributing to the reform of seaweed and seafood aquaculture technology. It is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a seawater pumping device according to an embodiment of the present invention, and FIG. 2 is a perspective view of a partition plate used in the device. 11~pipe, ■4~mooring chain, 15~sea floor, 16
~first buoy, 17~sea surface, 18~partition plate, 19~tension member, 20~second buoy, 21~weight, 2
2~valve hole, 23~valve plate.

Claims (1)

[Claims] The lower end of the pipe is anchored to the seabed, the upper end is pulled up by the first buoy, and the pipe stands up in the sea, thereby positioning the lower end of the pipe near the seabed and the upper end near the sea surface, and inside the pipe, A plurality of partition plates that can be slid in the vertical direction are arranged at appropriate intervals, and each partition plate is connected with a tension member.A second buoy floating on the sea surface is connected to the upper end of the tension member, and a second buoy is connected to the lower end of the tension member. A seawater pumping device characterized in that a weight is suspended, and the partition plate is provided with a valve mechanism that closes when the weight moves up in the pipe and opens when it moves down.