JPH1098973A - Marine plankton culture unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device unit for culturing plankton and fish kinds in the sea. SOLUTION: This unit is constituted of a unit main body 1 and a solar raft (solar battery power generation raft) 2, the unit main body 1 performs the function of the pump-up and discharge operation of submarine water in a sea surface floating shape and the solar raft 2 floating on a sea surface performs the function of the solar battery power generation of required power respectively. The unit main body 1 is composed of a main body part 3 and a pump-up pipe 4 and pumps up seawater and deposits containing nutrition required for the breeding of the plankton from the sea floor of several 10m - several 100m and discharges them near the sea surface by the pump-up pipe 4 provided with a sea floor plow 26 and the motor-driven pump/water discharge device of the main body part 3. Energy required for activity is self-supported, a whole-year efficient autonomous operation is performed without being affected by hydrographic conditions and the plankton and the fish kinds are bred.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus unit for breeding plankton and fish in the ocean, including in bays and coastal waters.

[0002]

2. Description of the Related Art In order to promote the growth of plankton, which is used as fish food, other than using deep sea floor water on land, a structure is installed on the sea floor, and deep sea water rich in plankton nutrients is used from the sea floor. A pumping device and the like have been tried. 10, 1989], the former aims to generate updrafts, that is, upwelling at appropriate places, but it is affected by the delicate topography of the sea floor, ocean currents, and tides, and the latter's seawater pumping equipment is greatly affected by sea areas and sea conditions. It is desired to improve the method and effect.

[0003]

In view of the fact that conventional methods are greatly affected by the natural conditions of the ocean, the present invention seeks to harmonize with various natural environments and utilize them to operate autonomously. It is a marine unit that proliferates plankton in the bay and coastal seas, as well as in the deep ocean beyond the shelf.
The aim is to achieve stabilization.

[0004]

The marine plankton culturing unit according to the present invention comprises a solar cell raft (solar raft) that floats on the sea surface and generates electric power necessary for operating the unit, and a unit main body that is mostly below the sea surface. It consists of a part of the unit body, a substantial part sinks below the sea surface, and a main part having a pump for pumping etc. and a flexible pumping pipe of variable length reaching the seabed from the lower part, the effective sediment together with seawater It is a pumping system.

That is, the unit main body and a solar raft which is connected to the main body via a connecting line including a power transmission line, and which floats slightly above the sea surface have a deep sea floor water pumping and discharging, and a solar raft. Has a function of supplying solar power to the unit body.The unit body consists of a main unit and a pumping tube.The main unit consists of buoyancy and equipment space, a buoyancy adjustment tank, and sand removal below these. It consists of space, and the depth is 200m
This pumping pipe reaching the bottom of the sea has a sea bottom strike at the tip, and the buoyancy and equipment space is a marine unit consisting of a control device, an electric pump / water discharge device, a high pressure air storage tank, a hydraulic device, an inverter / power supply device, and a storage battery And

One or more centrifugal pumps installed at the center of the buoyancy / device space and from each water discharge pipe extending from the centrifugal pump to the four outer corners of the main body or the midpoint between the outer sides. One or more of the water discharge pipe tips are basically disposed at four outer corners in a diagonal direction of the horizontal plane of the main body or at an intermediate point of each outer side, and provided with an on-off valve or a check valve. Pump / water discharge device composed of a water discharge pipe, or a drive motor located at the upper center of the buoyancy / device space, an impeller (propeller) fixed horizontally to the tip of a drive shaft extending downward, and a pump impeller The flow control valve is disposed in four directions from the downstream part of the main body, and has a flow control valve, the tip of which is disposed at four outer corners in a diagonal direction of the horizontal plane of the main body or at an intermediate point of each outer side and the center of gravity of the main body. Lebe Axial flow pump water discharge device consisting of four water discharge pipe which is set in the vicinity,

A high-pressure air storage tank connected to this tank via a buoyancy adjusting tank and a valve disposed above the buoyancy / device space, and a seafloor strike at the tip and penetrated through the perforated rod of each joint. A marine plankton aquaculture unit having a variable length flexible pumping tube with a built-in rope wound on a winch and pivotally connected to a sand discharge space.

[0008]

The marine plankton aquaculture unit of the present invention automatically and optimally controls the following items throughout the year according to external conditions such as the sun, ocean currents / tidal currents, water depth, wind waves, and the like. Self-sufficient energy required for operation and independent pumping and discharging of deep seabed water Good pumping of seabed water and surface water by pumping seabed water and pumping by slow speed movement of the marine unit due to thrust force associated with water discharging operation in all directions Stop by the operation of the mixing pump and the opening / closing valve of each water discharge pipe and the flow control valve, and set an arbitrary moving speed and direction.The internal of the pumping pipe based on the information of the submarine sounding device and the liquid switch attached to the submarine plow Winding the rope winch,
Setting of the appropriate length of the pumping pipe by rewinding, that is, adaptability to the shallow depth of the seabed. Water pressure and water level sensors for the three valves of the buoyancy control tank which is a buoyancy control system, exhaust, drainage and air supply. Descending and levitation of the main body of the unit by controlling the buoyancy by opening and closing interlocking operation based on the information of the descent Descending and levitation operation to avoid damage to the unit body during high waves by adjusting buoyancy Efficient operation that is less susceptible to sea conditions and has lower operating costs

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The basis of plankton growth is to increase plankton's photosynthetic activity, which is based on sunlight, nutrients and carbon dioxide. Therefore, it is necessary and sufficient to replenish nutrients that are likely to be scarce near the sea surface from deep water or the sea floor. As a means for solving the above-mentioned problem, an oceanic unit that mainly pumps organic matter contained in sediments from the sea floor at the same time as seawater from the sea floor in tides, weakly-current bays, coasts, and shelf oceans. Consists of components. That is, a unit main body 1 that pumps up and discharges water in a floating state on the sea surface, most of which sinks below the sea surface, and a solar raft (solar cell raft) 2 that performs solar power generation and is connected to the main body via a connecting line including a transmission line. [FIG. 1].

[0010] Unit body 1 as the first basic component
The main body 3 has a substantially rectangular parallelepiped main body 3 which is in a floating state on the sea surface which is substantially submerged and performs a water discharging operation, and a pumping pipe 4 which reaches the seabed at a depth of 200 m or more. Unit body 1
Is a square whose outer side is around 10m, height is less than 10m, its overall buoyancy is slightly larger than its weight, and it floats on the sea surface as it is, but it sinks below the sea surface by removing buoyancy adjustment Is also possible. This means that stable pumping operation can be continued while avoiding the effects of waves. The pumping pipe 4 is a flexible and stretchable pipe that pivotally connects at the center of the lower surface of the main body 3 and reaches the sea floor.

[0011] The solar raft 2 as the second basic component
Has a size of several tens of square meters, and a plurality of light-thin, several-meter-square light and thin solar cell panels 5 having seawater resistance floating on the sea surface by the foam floating material on the back surface are freely pin-joined. Therefore, the raft can be folded, deformed to follow waves, and is not easily damaged, the number of solar cell panels can be easily increased and decreased, and the required power generation can be secured [FIG. 1]. Further, as described above, the raft is connected to the main unit 3 at a distance of several tens of meters or more via a chain or a connecting line 6 including a transmission line, and sends the generated power that is a power source of the marine unit to the main unit.

More specifically, the unit main body 1, which is the first basic component and almost submerges below the sea surface, is divided into a main body 3 and a pumping pipe 4, and the main body 3 is further divided into buoyancy adjusting tanks 10 in an approximate order from the top. , Buoyancy / device space 11 and sand discharge space 12 [FIG. 2] [FIG. 2A].
Most of the equipment required for the operation of the marine unit is installed in the buoyancy and equipment space. The center of buoyancy (buoyancy) of this space is located above the center of weight of the main body, that is, above the center of gravity, and is stable. Adjustment of the relationship between the buoyancy and the center of gravity is performed by ballast or additional buoyancy.

A buoyancy adjusting tank 10 which is partially above the sea surface is installed at the upper center of the buoyancy / device space, and is used for descent and floating of the unit body. An air supply valve 14 and an exhaust valve 15 connected to the high-pressure air storage tank 13 are disposed above the regulating tank 10, and a drainage valve 16 is disposed below the regulating tank 10. Adjustment control of buoyancy is possible by opening and closing interlocking operation based on the information of the sensor (water pressure gauge) 17a [FIG. 3].

Usually, an adjustment tank 1 filled with air.
The three valves 0 are closed to maintain the maximum adjusted buoyancy, and when the unit body descends and dive below the sea surface under the influence of high waves, the exhaust valve 15 and the drainage valve 16 are provided.
Open, exhaust and water are conducted, and as the buoyancy decreases, the buoyancy possessed by the unit body 1 becomes smaller than its overall weight,
Therefore, the unit body descends. Underwater floating at a certain depth balances the total weight and buoyancy. In case of ascending, supply air valve 15 and drainage valve 16
Is opened, high-pressure air enters, water is discharged, buoyancy is restored, and the unit body 1 returns to a sea-floating state floating on the sea surface.

The weight of marine organisms that adhere to the marine unit over time is offset by the buoyancy of the regulating tank, or a floating body is added according to the situation. It is also possible to install a trim tank that performs a function of adjusting the inclination (trim) of the main body. Located at the lower four corners of the main body, each trim tank has the same configuration as a buoyancy control tank and is usually filled with seawater.

The buoyancy / device space 11 includes a control device, an electric volute pump / water discharge device 19 or an electric axial flow pump / water discharge device 19A, a high pressure air storage tank 13, a winch (rope hoisting machine) 20, and various valves. A hydraulic device, an inverter / power supply, a seafloor, a storage battery, etc., for driving the vehicle are installed. These devices perform the following functions. -The control unit automatically controls the operation of the marine unit optimally for maximum efficiency and enables remote automatic control. The electric volute pump / water discharge device 19 or the electric axial flow pump / water discharge device 19 </ b> A is operated by the electric power generated by the solar raft 2, and basically uses the seabed water flowing through the pumping pipe 4 and flowing into the sand discharge space 12. Has four drain pipes 25, 25
Release water from A. The unit main body can move at a very low speed by the thrust caused by the water discharge.

The high-pressure air storage tank 13 supplies high-pressure air to the buoyancy adjusting tank 10 when the unit body re-emerges after descending. High pressure air is supplied during regular maintenance. -The winch (rope winder) 20 is a sand discharge space 1
2, a rope 2 that passes through the inside of a pumping pipe 4 reaching the seabed with a depth of 200 m or more and connects to a seabed plow 26 at the tip
7 is used for adjusting the length of the pumping tube and shortening it by rewinding it. The valve is an open / close valve 28 attached to each water discharge pipe 25 or a flow rate adjustment valve 28A attached to each water discharge pipe 25A, an air supply valve attached to a buoyancy adjustment tank,
There are a drainage valve, an exhaust valve, and a high-pressure air injection valve for the high-pressure air storage tank, which are related to buoyancy adjustment.

The hydraulic device is a hydraulic pressure generating device that drives the winch and various valves.・ The seafloor provides sounding data in the case of adjustment of the length of the pumping pipe. -The water pressure sensors 17a are installed at the lower four corners of the main body and detect the inclination thereof. The inverter and power supply process the power generated by the solar raft 2 and are used for powering pumps, operating control devices, and supplying power for lighting and the like.・ The storage battery is for maintaining the function of the marine unit other than pumping and discharging operation at night or long-term cloudy weather,
Charged during the day.・ In addition, a transmitter / receiver that can perform underwater communication for remote operation and data communication is installed.

It is to be noted that a loop may be formed by connecting an air compressor to the high-pressure air storage tank, the air supply valve, the buoyancy adjusting tank, and the exhaust valve. This is because the air supplied from the high-pressure air storage tank to the buoyancy adjusting tank is collected and reused to repeatedly float and descend the unit body. The hydraulically driven winch and valve may be electrically driven.

The sand discharge space 12 located at the lower end of the main body 3 separates sand mixed with sea bottom water passing from the pumping pipe 4 connected to the lower surface of the main body 3 to the pump / water discharge device 19, and Discharge to

The vortex pump / water discharge device 19 which forms the center of the buoyancy / device space 11 of the main body 3 is provided with one or a plurality of electric vortex pumps 29 installed in the center of the space and the main body from the vortex pump. Each of the water discharge pipes 25 is provided with an on-off valve 28 or a check valve attached to the four outer corners or the midpoint between the outer sides, and is provided with an on-off valve 28 or a check valve. Suction into the impeller from the direction of the rotation axis of the impeller, and discharge water from the outlets of each water discharge pipe basically in the diagonal direction of the horizontal plane of the main part at the four outer corners or vertically and horizontally at the outer periphery (Pumping capacity: several thousand to several tens of thousands m ³ / h) [FIG. 4]. In addition, the set level of the water discharge eye is the above-mentioned center of gravity level or different therefrom.

On the other hand, an electric type axial flow pump / water discharge device 19A of a type different from the spiral pump / water discharge device has a drive motor 31 located at the center of the buoyancy / device space 11 and a drive shaft 32 extending downward from the drive motor 31. The impeller (propeller) 33 is fixed horizontally, and is arranged in one or more directions around the drive shaft in the downstream part of the impeller, and further bent and stretched. At right angles to the diagonal direction of the main body horizontal plane or at each outer periphery, horizontally,
And the water discharge pipes 25A set at the level of the center of gravity or different levels. The water is quickly pumped from the sand discharge space 12 to the water discharge pipe 25A and flows through the water discharge pipe 25A to pump up the water on the seabed and discharge the water to the outside [FIG. 2A]. .

The water discharged from the water outlet at the tip can be used alone or in any combination by opening and closing the on-off valves 28 attached to the respective water discharge pipes and adjusting the output of the volute pump, or by opening and closing the drive motor 31 and the flow control valve 28A. This can be performed while adjusting the amount of water discharged from each pipe, and as a result, thrust in an arbitrary direction is generated by the discharged water. Therefore, when water is discharged by two pipes singly or arbitrarily adjacent to each other, the unit main body moves at a very low speed relative to the sea surface in a direction substantially opposite to the water discharge direction, and can also move in an S-shape. If four waters are released at the same time, it stops, but if there is an ocean current, the seabed plow 26 moves on the seabed.
If the movement speed of the seabed plow is excessive, pull the small anchor connected by a chain of a certain length from the middle of the extension length of the pumping pipe, while adjusting the inclination (trim) of the main part with the trim tank. Therefore, the speed may be reduced.

In addition, a rotating plate that rotates about a vertical axis is provided at the tip of the water outlet of any one water discharging pipe, and an angle with respect to the water discharging direction is set on the rotating plate. The main body may be horizontally rotatable about the pivotal connection part. In order to promote the mixing of cold sea bottom water and warm surface water (temperature difference of about 10 to 20 ° C), there is a retractable water intake port on the side of the sand discharge space or an elastic water absorption pipe that absorbs water from the sea surface and pumps up. It is also possible to set a surface water discharge device that has the same configuration as the pump / water discharge device for water and that arranges the surface water discharge pipe below the water discharge pipe.

The sand discharging space 12 separates and mixes sand mixed in from the seabed water flowing in from a pumping pipe connected below. This is to prevent damage to the pump. That is, in order to prevent the sea bottom water flowing out of the pumping pipe from flowing directly into the impeller (propeller) of the pump, a shielding plate 34 is installed horizontally, and the flow velocity at which the shielding plate 34 abuts on the shielding plate and spreads in four directions. The sand precipitates and separates in the sand discharge space before the fallen water bypasses the peripheral edge of the shielding plate and flows up to the pump side [FIG. 4]. When a certain amount is accumulated, the discharge port 35 is opened by its weight, and the sand is discharged outside the main body. The discharge port may be a discharge device that opens and closes periodically. The weight of the accumulated sand is offset by the preliminary buoyancy of the buoyancy control tank.

The pumping tube 4 is a flexible and elastic tube extending from the main body 1 to the seabed at a depth of 200 m or more, and has a seabed hammer 26 at its tip [FIG. 1]. A pivot connection 36 at the center of the lower surface of the sand discharge space that forms the bottom of the main body
This pumping pipe 4 which reaches from the bottom to the sea bottom is a pipe body in which flexible pipes are successively connected by an annular joint 37, and has a fan-shaped flat submarine plow 26 for sucking water at the sea bottom at the tip thereof. A rod 39 longer than the diameter of the joint having a hole 38 corresponding to the center thereof is penetrated through the annular joint. The tip of the seabed plow is the suction port 40, and there are a number of protrusions 41 on both sides near the suction port [FIG. 4]. When the unit moves due to ocean currents, tidal currents, and thrusts, the seabed plows also move. At this time, sediments are excavated and pumped together with seawater. And the digging depth depends on the underwater weight of the seabed plow.

A rope 27 connected to the seabed plow 26 passes through the inside of the pumping pipe 4, penetrates the hole of the rod 39 of the joint, enters the sand discharge space 12, passes through the shielding plate 35, and winches the buoyancy / device space 11. (Rope hoisting machine) 20. The winch take-up drum 42 is outside the buoyancy and equipment space [FIG. 4]. For this reason, if a rope is wound by a winch, the seabed plow will separate from the seabed and eventually the total length of the pumping pipe will be reduced to about 1/20. This is pumping pipe 4
Can be adjusted appropriately according to the depth of the seabed. In addition, the unit itself can be moved at a low speed by pumping and discharging water with the rope wound as much as possible and the pumping tube shortened to the minimum, and can return on its own when it deviates from the appropriate sea area due to ocean currents, tides, wind waves, etc. That is.

It should be noted that the detection of the landing of the seabed plow and the fall of the seabed can be carried out by the information of the seafloor and the liquid switch 4 attached to the seabed plow
3 with the conduction signal. This liquid switch is a system in which a conductive liquid that has entered about 2/3 of a short thin tube connects the contacts at the upper and lower ends of the tube when it lays down. When the seabed plow is hoisted, conduction is cut off.

Further, in order to prevent the pumping pipe 4 from being tensile-deformed and broken by the force acting in the sea, the pumping pipe 4 is connected to each joint outside the pumping pipe and continuously from the sand discharge space to the seabed plow. A plurality of reinforcing ropes 44 made of synthetic fibers are passed [FIG. 4]. The flexible tube forming the pumping tube is made of synthetic resin, synthetic fiber, spiral wire, or the like. In order to adjust the position of the center of gravity of the pumping pipe, a floating body or a weight may be attached to each joint of the pipe to adjust the weight of the pumping water.

The buoyancy control is based on the buoyancy adjustment tank, high-pressure air storage tank, each valve for air supply, guiding, draining and exhausting, water level,
It is performed by the interlocking operation of each buoyancy control element composed of a water pressure sensor according to a command from the control device. The descent and ascent by adjusting the buoyancy to avoid damage to the unit body during high waves are as follows.

When the unit body 1 descends from the sea surface in a state where the buoyancy adjusting tank 10 is filled with air and has the maximum adjusted buoyancy, the upper exhaust valve 14 and the lower guiding / draining valve 16 of the buoyancy adjusting tank are provided. Is opened and the buoyancy is reduced, the main body 3, which is the unit body, starts descending. Strain gauge type tank water level sensor 17
Then, the water depth is detected by a water pressure sensor, and the total weight and the buoyancy are balanced by opening and closing the two valves.
If the high waves calm down to some extent and rise, open the air supply valve 15 and the water introduction / drainage valve 16 to supply air from the high pressure air storage tank 13 and discharge seawater to the outside, and then refill the air into the regulating tank to restore buoyancy. As a result, the main part floats and returns to the original sea surface floating state.

As a type of the marine unit, there is an operation system which is always in a diving state in order to avoid damage to the unit body at the time of high waves. That is, a non-metallic float (floating) 45B
The main unit 1 below the sea level by several meters to several tens of meters
The unit is suspended and supported (suspended) by a connecting rope 6B, and a main body of the unit body is a three-body type connected to the solar raft unit 2 by a connecting rope 6 including a transmission line [FIG. 5]. In some cases, the float and the solar raft may be connected.

The above description is about the case where the marine unit pumps seabed water and available sediment. Of course, it is also possible to remove the seabed plow and pump the bottom water free of sediment in some cases. The components of the marine unit, especially the shape, structure, device, arrangement, etc. of the main part are not limited to those described above.
For example, changing the shape and position of the buoyancy adjustment tank, dividing the buoyancy and equipment space into a buoyancy space that secures the necessary buoyancy and a compact equipment space, and placing the buoyancy space above the equipment space,

Also, the solar raft, which is the second basic component, is divided into a plurality of units, the "checkerboard" arrangement of the unit solar cell panels, and a very large area so as not to be turned up by wind waves. Drop a balanced weight deeply around the thin and light raft, move the marine unit,
An electric screw with balanced buoyancy may be provided on both sides of the raft to facilitate stopping. Furthermore, a method in which a solar raft is connected to the side of the main body, a float is connected to the solar raft, and a solar cell is mounted on the main body in place of the solar raft may be used.

In some cases, the marine unit may be operated by land power instead of solar-raft solar cell power generation, or may be used in combination with internal-combustion engine-driven power generation, so that cold sea bottom water and warm surface water (temperature difference of about 10 to 20) may be used. C) may be installed. In addition, although it is necessary for the operation and maintenance of the marine unit, common structures and equipment commonly used in ships and other general structures used in the sea, details of the operation of these, and software for control, various Details of sensors, various pipes (air, water, oil), wiring (electricity, signals), etc. are also omitted. The operation control system of the control device and various devices related thereto is schematically shown in FIG. A communication antenna and a warning light are provided on the main body and the upper surface of the float, and a warning light is provided on the solar raft.

[0036]

As described above, the marine plankton culturing unit, which is basically composed of a unit body that floats on the surface of the sea to pump up seawater and performs a water discharge operation, and a solar raft that basically transmits solar power to the unit body, consumes energy. It is self-sufficient and moves at a very low speed due to thrust accompanied by water discharge at the same time as pumping and water discharge operation by unmanned automatic control, and also drifts due to tidal currents and ocean currents, so variable length pumping pipes even in sea areas where the depth changes. The bottom seabed plow always plows seabed sediment, and efficiently pumps not only seawater but also organic matter contained in sediment and rich in nutrients necessary for plankton multiplication at the same time, Water discharge forms a nutrient-rich water mass near the sea surface. As a result, plankton proliferates, and fish gather and grow by the food chain. Solar rafts can increase or decrease the number of solar cells, and can set the capacity of marine plankton aquaculture units according to the amount of power generated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a marine unit of the present invention.

FIG. 2 is a sectional view and a plan view of a main part of a vortex pump / water discharge device type of the marine unit of the present invention.

FIG. 2A shows a cross section of the main part of the axial flow pump / water discharge device type of the marine unit of the present invention.

FIG. 3 shows a configuration of a buoyancy adjusting tank of the marine unit of the present invention.

FIG. 4 is a detailed sectional view of a main part of a vortex pump / water discharge device type of the marine unit of the present invention.

FIG. 5 is a marine unit of the present invention, a solar raft,
3 shows a three-body type of a float and a unit body.

FIG. 6 shows an outline of a control system of operation of the marine unit of the present invention.

[Explanation of symbols]

1 unit body, 2 solar rafts, 3 main parts, 4 pumping pipes, 5 solar cell panels, 6, 6B connecting rope, 10 buoyancy adjustment tank, 11 buoyancy / device space, 12 sand discharge space, 13 high pressure air storage tank, 14 air supply valve, 15 exhaust valve, 16 guide / drain valve, 17 tank water level sensor, 1
7a water pressure sensor (water pressure gauge), 19 spiral pump / water discharge device, 19A axial flow pump / water discharge device, 20 winch, 2
5, 25A water discharge pipe, 26 submarine plow, 27 rope, 28
Open / close valve, 28A flow control valve, 29 volute pump,
31 drive motor, 32 drive shaft, 33 impeller (propeller), 34 shield plate, 35 outlet, 36 pivot joint, 37
Ring joint, 38 holes, 39 rods, 40 suction ports, 41 protrusions, 4
2 take-up drums, 43 liquid switches, 44 reinforcements, 45B
float,

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI C12N 1/12 C12N 1/12 A

Claims (3)

[Claims] 1. A unit body and a solar raft connected to the unit via a connecting line including a power transmission line, the unit body floating on the sea surface pumps and discharges deep water, and the solar raft is a solar cell power generator. The main body consists of a main part and a pumping pipe, and the main part consists of a buoyancy / device space, a buoyancy adjustment tank, a sand discharge space below these, and The pumping pipe that reaches has a seabed strike at the tip,
The equipment space is a marine unit consisting of a control device, a pump / water discharge device, a high-pressure gas storage tank, a hydraulic device, an inverter / power supply device, and a storage battery, and one or more pumps installed in the center of the buoyancy / device space. A pump / water discharge device including one or a plurality of water discharge pipes extending from the respective pumps to the outer peripheral portion including the outer corners of the main body and having an open / close valve, and connected to this tank via a buoyancy adjusting tank and a valve. A high-pressure air storage tank and a variable-length flexible pumping pipe that has a seabed strike at the tip and that joins this strike, penetrates the perforated rod of each joint, incorporates a rope to the winch, and pivotally connects to the sand discharge space A marine plankton aquaculture unit characterized by having: 2. A marine plankton aquaculture unit according to claim 1, wherein the pump / water discharge device is replaced with a drive motor located at the center of the buoyancy / device space.
An impeller horizontally fixed to a tip of a drive shaft extending downward from the motor; a flow control valve disposed at four sides from a wake portion of the impeller, the tip portion having an outer periphery including an outer corner of the main body portion A marine plankton cultivation unit comprising a pump / water discharge device including one or more water discharge pipes set horizontally in a section. 3. A marine plankton aquaculture unit according to claim 1, further comprising: a unit main body below the water surface, a float for suspending and supporting the main body with a connecting line, and a solar raft connected to the unit main body with a connecting line including a transmission line. A marine plankton aquaculture unit, comprising: