JPH0426807B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floating aquaculture device, and more particularly to a large-scale floating aquaculture device that can move freely on the sea.

[Conventional technology]

As shown in Figure 3, the large-scale marine aquaculture system implemented in Northern Europe and other countries consists of a barge 1 on a grid that is moored in an inner bay, fjord, etc., and a barge 1 on a grid 1a, and chemical fibers and steel barges attached to the grid 1a. A large number of enclosures 3 are formed by net cages 2 consisting of net cages 2, etc., and fish and other fish are cultivated within these enclosures 3.

[Problem to be solved by the invention]

The above-mentioned aquaculture equipment is suitable for areas with calm weather and sea conditions, such as inner bays and fjords, but in Japan, such areas are occupied by small-scale aquaculture facilities, and efficient large-scale aquaculture is not possible. The current situation is that they are pushed offshore. Considering typhoons, large waves, strong sea currents, etc., fragile structures such as barges and enclosures cannot be used for aquaculture facilities. Furthermore, when sea currents or water currents are fast, the net cage is blown and deformed, making it impossible to secure the space necessary for aquaculture and causing damage to the fish inside the cage.

Additionally, as there are significant seasonal changes like in the seas surrounding Japan, and in addition, the influence of ocean currents is large, it is not always possible to obtain the optimum water temperature for aquaculture at a fixed point.
Furthermore, there are phenomena such as abnormal red tides and blue tides caused by wastewater from general households, factories, etc., and it is necessary to protect the fish and shellfish being cultured from these phenomena. Because movement is almost impossible, it is inevitable that red or blue tides will kill fish and shellfish and cause great damage.

Furthermore, suitable areas for aquaculture such as inner bays and fjords are
In most cases, they are used by existing businesses, so new entrants with the premise of large-scale aquaculture business have no choice but to use other waters other than inner bays and fjords. It would be almost impossible to establish an aquaculture facility like the one shown in Figure 3 in the open sea due to the structure and risks involved.

The present invention was made in order to solve the above-mentioned problems, and it facilitates the movement of aquaculture facilities on the ocean, enables offshore aquaculture, reduces aquaculture risks, and reduces the need for aquaculture tanks. The purpose of the present invention is to provide a floating aquaculture device that can replace aquaculture seawater at low cost.

[Means to solve the problem]

The floating aquaculture device according to the present invention comprises: a floating aquaculture body such as a tanker, a barge, etc. that is movable on the ocean; an aquaculture tank formed within the aquaculture float and isolated from the ocean; and a culture tank that is connected to the ocean. a water supply and drainage route that communicates with the aquaculture tank and performs one of water injection and drainage into the aquaculture tank using a siphon effect due to a pressure head difference between the sea surface and the aquaculture tank; The water supply and drainage route and the water supply and drainage means communicate with the aquaculture tank and the ocean side via the upper part of the aquaculture tank, and a control unit is installed on the aquaculture floating body. , the water supply and drainage route is provided with an electromagnetic valve for water supply or drainage and a check valve that opens in the seawater injection direction, and the water supply and drainage means is provided with a water supply or drainage pump provided on the upper part of the aquaculture floating body. A liquid level sensor is installed in the aquaculture tank to detect the internal seawater level, and the control unit receives a detection signal from the liquid level sensor or when the seawater in the aquaculture tank is replaced with ocean seawater. The system is configured to control the opening/closing of the electromagnetic valve for water supply or drainage and the operation/stopping of the water supply or drainage pump based on the command.

[Effect]

In the present invention, when supplying seawater into the aquaculture tank, the water supply pipe is filled with seawater with the water supply valve closed, and then an opening command is given to the control unit to open the water supply valve. Seawater sequentially flows into the aquaculture tank from the check valve through the water supply path due to a water head difference between the sea level and the water level in the aquaculture tank. That is, seawater is automatically supplied into the culture tank by the siphon effect without using water supply power such as a pump. When the liquid level sensor detects that the water level in the aquaculture tank is at an appropriate level to maintain the specified buoyancy of the floating body for the aquaculture tank, the control unit that receives the signal from this liquid level sensor sends a close command to the water supply valve. Then, close the water supply valve to stop the supply of seawater to the aquaculture tank.

On the other hand, when replacing the seawater in the aquaculture tank with seawater from the ocean, the control unit gives a driving command to the drainage pump and drives the drainage pump.
The seawater in the aquaculture tank is forcibly discharged into the sea through the drainage channel. As a result, when the water level in the aquaculture tank reaches the lower limit level, the control unit issues a stop command to the drainage pump based on a signal from the liquid level sensor that detects this, stopping the drainage pump and commanding the water supply valve to open. By opening this water supply valve, new seawater is supplied into the aquaculture tank through the water supply path. When the liquid level sensor detects that the water level in the aquaculture tank is at an appropriate level to maintain a predetermined buoyancy of the floating body for the aquaculture tank, the control unit receives a signal from the liquid level sensor and commands the water supply valve to close. and close the water supply valve to stop the supply of seawater to the aquaculture tank.

When seawater is supplied into the aquaculture tank by the water supply pump, a command to operate the water supply pump is sent to the control unit to fill the aquaculture tank with seawater. When the liquid level sensor detects that the water level in the aquaculture tank is at an appropriate level to maintain the specified buoyancy of the floating body for the aquaculture tank, the control unit receives a signal from the liquid level sensor and stops the water supply pump. Sends a command to stop the supply of seawater to the aquaculture tank.

On the other hand, when replacing the seawater in the aquaculture tank with seawater from the ocean, the space between the Chietsuki valve and the drain valve is filled with seawater, and the siphon effect due to the pressure head difference between the inside of the aquaculture tank and the sea surface causes the water in the aquaculture tank to rise. Discharge seawater into the sea. As a result, when the water level in the aquaculture tank reaches the lower limit level, the control unit sends a close command to the drain valve based on the signal from the liquid level sensor that detects this, closing the drain valve and stopping the discharge of seawater. . After that, the control unit gives an operation command to the water supply pump, and the water supply pump
New seawater is supplied into the aquaculture tank through the water supply route. When the liquid level sensor detects that the water level in the aquaculture tank is at an appropriate level to maintain the specified buoyancy of the floating body for the aquaculture tank, the control unit receives a signal from the liquid level sensor and stops the water supply pump. Sends a command to close the water pump and stop the supply of seawater to the aquaculture tank.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1a is a sectional view showing the basic configuration of a floating aquaculture device according to the present invention.

In the figure, a floating body 10 constitutes a fish and shellfish culture tank, and has a culture tank 11 with a required volume that is closed at the top, side circumference, and bottom.
Inside, seawater 12 is filled at a level L2 lower than the sea surface level L1. The floating body 10 may have a propulsion device and be self-propelled, or may be a non-self-propelled body towed by a tub boat or the like.

The aquaculture tank 11 and the sea are communicated by a water supply pipe 13 that enables water to be taken in by a siphon effect, and a check valve 14 that opens in the seawater injection direction is interposed in the middle of the water supply pipe 13 that is submerged in the sea. In addition, an electromagnetic water supply valve 15 is interposed in the middle of the water supply pipe 13 on the culture tank 11 side.

Moreover, on the top plate 10a of the floating body 10, there is a culture tank 1
A drainage pump 16 is installed to drain the seawater inside the cultivation tank 11 to the outside of the cultivation tank 11. A drainage pipe 17 connected to the suction side of the drainage pump 16 is inserted into the cultivation tank 11 until it reaches the vicinity of the bottom surface of the cultivation tank 11. A drain pipe 18 connected to the discharge side of the tank is extended above the sea surface.

19 is the water supply valve 15 and the drain pump 16
A liquid level sensor 20 that detects the seawater level in the aquaculture tank 11 is connected to this control unit 19.
From there, a control command signal is output to the water supply valve 15 and the drain pump 16.
Reference numeral 21 denotes an opening formed in the upper surface plate 10a of the floating body 10, which also serves as a lighting and working opening. Near this opening 21, there is a working platform 22 located inside the aquaculture tank 11 for picking up adult fish, etc. is the top plate 1
It is installed in a suspended state from 0a.

Next, the operation of this embodiment configured as described above will be explained.

When supplying seawater into the aquaculture tank 11, first,
With the water supply valve 15 closed, seawater is injected into the water supply pipe 13 by driving a priming pump (not shown) to fill the water supply pipe 13 with seawater. At this time, the air in the water supply pipe 13 is exhausted through a relief valve (not shown).

In this state, the control unit 19 gives an opening command to the water supply valve 15, and the water supply valve 15 is opened.
When opened, seawater sequentially flows into the aquaculture tank 11 from the check valve 14 through the water supply pipe 13 due to the water head difference H between the sea level L1 and the water level L2' in the aquaculture tank 11. That is, seawater is automatically supplied into the culture tank by the siphon effect without using water supply power such as a pump.

When the liquid level sensor 20 detects that the water level in the aquaculture tank 11 has reached the appropriate level for maintaining the predetermined buoyancy of the floating body 10, that is, the water level L2, the control system receives a signal from the liquid level sensor 20. The unit 19 sends a close command to the water supply valve 15 to close the water supply valve 15 and stop the supply of seawater to the aquaculture tank 11.

On the other hand, while fish and shellfish are being cultured in the seawater injected into the aquaculture tank 11 in this way, in order to prevent oxygen deficiency in the seawater in the aquaculture tank 11,
When the seawater is replaced (exchanged) with seawater from the ocean with a high amount of dissolved oxygen, the control unit 19 gives an operation command to the drainage pump 16, and by driving the drainage pump 16, the seawater in the aquaculture tank 11 is replaced. It is forcibly discharged into the sea through drainage pipes 17 and 18.
As a result, when the water level in the aquaculture tank 11 reaches the lower limit level L2', the control unit 19 issues a stop command to the drain pump 16 based on a signal from the liquid level sensor 20 that detects this, and stops the drain pump 16. At the same time, by giving an opening command to the water supply valve 15 and opening the water supply valve 15, new seawater is supplied into the culture tank 11 through the water supply pipe 13. Then, when the water surface level reaches L2,
The water supply valve 15 is closed in the same manner as above.

In the above-mentioned aquaculture device, since the floating body 10 itself constitutes an aquaculture facility, a plurality of floating bodies 10 including water supply and drainage equipment, etc. as shown in FIG. When it comes to the body,
It can be a large-scale aquaculture facility, and since the floating body is the main body of the facility, the entire facility can be moved to a desired location such as offshore in search of an appropriate water temperature, and the facility can be moved to protect it from damage from typhoons, red tide, etc. It will be easier to move to protect seafood. The facility can be easily moored at an appropriate water temperature or at an evacuation site using anchors, etc.

In addition, since the inside of the aquaculture tank 11 formed within the floating body 10 is completely isolated from the surrounding seawater, extreme waves should not be generated within the aquaculture tank when moving to an area with a suitable water temperature. If you are careful, even if you increase the moving speed, there is no risk of killing the fish and shellfish in the aquaculture tank, especially the young fish, as with conventional net cages, and you can shorten the moving time and reduce moving costs. Furthermore, the probability of damage from sudden changes in water temperature, typhoons, red tides, blue tides, etc. is extremely low, reducing business risks.

In addition, since the entire facility including the floating body can be moved offshore like a ship to farm fish and shellfish, there is no need to compete for space on the ocean, making it possible to operate alongside existing aquaculture businesses in inner bays, etc. become. Furthermore, by making offshore aquaculture possible, it becomes possible to indirectly prevent pollution of the sea area, and since seawater can be supplied using a siphon effect, operating costs for the facility can also be reduced.

FIG. 1b shows a modification of the embodiment shown in FIG. 1a, in which the water supply pipe 13 is replaced by a water supply pump 1.
Water supply pipes 17' and 18' having 6' are provided, and the water supply pump 16' is operated to pump seawater from the water supply pipes 18' and 17' into the aquaculture tank 11 so that the water level L2 is above the sea level of the ocean. and a drain pipe 1 having a check valve 14 and a drain valve 15' instead of the drain pump 16 and drain pipes 17 and 18.
3', and by opening and closing the drain valve 15', the seawater in the aquaculture tank 11 is discharged into the sea by the siphon effect caused by the pressure head difference between the inside of the aquaculture tank 11 and the sea surface, as shown in Fig. 1a. The operation is almost the same as that of the embodiment.

FIG. 2 is a schematic diagram showing an embodiment of the basic system shown in FIG. 1 described above, in which a large-scale floating aquaculture apparatus is constructed using a surplus ship.

In the figure, a floating body 30 is constructed using the hull of a surplus ship such as a tanker, and the interior of the hull is divided into a plurality of spaces completely separated by bulkheads 31 from the bow to the stern. A part of the space other than the space 32 on the bow side and the space 33 on the stern side is used as fish and shellfish culture tanks 34 ₁ to 34 _o ,
The remaining space is being used as an administration building for managing the entire aquaculture equipment, a warehouse for storing feed, a freezer for storing seafood before and after processing, and a processing facility for processing seafood. Further, in the space 33 on the stern side, for example, a diesel engine, power generation equipment, and other equipment (all not shown) for self-navigating the floating body 30 are installed.

At the bottom of the space 32 on the bow side, one end of a main water supply pipe 35 and a preliminary water supply pipe 36 are connected to a check valve 3, respectively.
7, 38 to communicate with the sea,
The other end sides of the main water supply pipe 35 and the preliminary water supply pipe 36 are laid along the arrangement direction of the aquaculture tanks, and the main water supply pipe 3 corresponds to each aquaculture tank 34 ₁ to 34 _o .
Branch pipes 39 ₁ to 39 _o and branch pipes 40 ₁ to 40 _o branched from 5 and the preliminary water supply pipe 36, respectively, are introduced into the corresponding culture tanks 34 ₁ to 34 _o , and these branch pipes 39 ₁ to 39 _o In the middle of the branch pipes 40 ₁ to 40 _o , electromagnetic opening/closing water supply valves 41 ₁ to 41 _o and 42 ₁ to 42 _o are interposed below the sea level L1.

Moreover, in each culture tank 34 ₁ to 34 _o , there are main drain pipes for suction 43 ₁ to 43 _o and preliminary drain pipes for suction 44 ₁ to 43 o.
44 _o is introduced, and these suction main drain pipes 43 ₁ to 43 _o and suction preliminary drain pipes 44 ₁ to
The inlets of the drain pipes 43 ₁ , 44 ₁ on the bow side of the 44 _o are connected to the dedicated drain pump 4 to the first aquaculture tank 34 ₁ via the electromagnetic drain valves 45 ₁ , 46 ₁ for suction, respectively.
The discharge electromagnetic drain valves 48 ₁ , 4 are connected to the suction side of the drain pump 47 1 , and the discharge side of the drain pump 47 ₁ is connected to the discharge side of the drain pump 47 ₁ .
A common discharge main drain pipe 50 and a common discharge preliminary drain pipe 51 are connected through 9 ₁ , and the outlets of these drain pipes 50 and 51 are connected to the bottom of the stern side space 33 .

Similarly, the second culture tank 34 ₂ to the nth culture tank 3
In the main suction drain pipes 43 ₂ to 43 _o and the preliminary suction drain pipes 44 ₁ to 44 _o corresponding to 4 _o , separate electromagnetic suction drain valves 45 ₂ to 45 _o , 46 ₂ to
_46o , it is connected to the suction side of each drainage pump ₄₇₂ to _47o dedicated to the second to nth aquaculture tanks, and furthermore, on the discharge side of each drainage pump, a respective electromagnetic drainage valve ₄₈₂ for discharge is connected. The inlets of the common discharge main drain pipe 50 and the discharge preliminary drain pipe 51 are connected through 48 _o and 49 ₂ to 49 _o , and these discharge drain pipes 5
The outlets 0 and 51 are connected to the bottom of the stern space 33.

Further, in FIG. 2, reference numeral 52 denotes a priming pump installed at a level below the sea level L2 in the bow side space 32, and the suction port of the priming pump 52 is communicated with the sea from the bottom of the floating body via an electromagnetic source valve 53. , and the piping 54 connected to the discharge port of the priming pump 52 has separate electromagnetic outlet valves 55 and 56.
It is connected to the main water supply pipe 35 and the preliminary water supply pipe 36 via.

57 is an emergency air blower installed on the deck of the floating body 30 or inside the bow side space 32,
If the drainage pumps 47 ₁ to 47 _o fail and it becomes impossible to supply new seawater to the aquaculture tanks 34 ₁ to 34 _o due to the siphon effect, the aquaculture tanks 34 ₁ to 3 are temporarily
This emergency air blower is used to supply oxygen to the seawater by blowing air into the seawater within 4 _o to create a circulation flow in the seawater and at the same time supplying oxygen to the seawater.
One end of air supply pipes 58 ₁ to 58 _o laid corresponding to each culture tank 34 ₁ to 34 _o is connected to the discharge port of 7 through a separate electromagnetic air valve 59 ₁ to 59 _o , Air nozzle pipes 60 ₁ - 60 _o arranged at the bottoms of the respective culture tanks 34 ₁ - 34 _o are connected to the other ends of the air supply pipes 58 ₁ - 58 _o .

Next, the operation of the embodiment configured as described above will be explained.

When initially injecting seawater into each aquaculture tank 34 ₁ to 34 _o , or when moving the aquaculture site and starting to inject seawater, the suction side electromagnetic pump of the priming pump 52 installed below sea level L1 is used. Original valve 53
And the discharge side electromagnetic outlet valves 55 and 56 are opened. This allows seawater to flow from the bottom of the floating body to the priming pump 52.
The priming water flows into the water supply line and enables the priming water pump 52 to supply priming water to the water supply line. After that, the electromagnetic water supply valves 41 ₁ of the branch pipes 39 ₁ to 39 _o branched from the main water supply pipe 35 to each culture tank 34 ₁ to 34 _o
The electromagnetic water supply valves 42 ₁ to 42 _o of the branch pipes 40 ₁ to 40 _o branched from the main water supply pipe 36 and the preliminary water supply pipe 36 are closed by a closing command from a control unit (not shown ₎ , and the escape valves of the main and preliminary water supply lines ( (not shown) is opened, and the priming pump 52 is driven. This will fill the main and backup water supply lines with seawater. Then, close the escape valve when the air in the piping is completely released.
At this time, since there are water supply check valves 37 and 38 on the suction sides of the main water supply pipe 35 and the preliminary water supply pipe 36, seawater in the pipe water does not escape.

Once the main and preliminary water supply lines are filled with priming water, the priming pump 52 is stopped, its solenoid source valve 53 and solenoid outlet valves 55 and 56 are closed, and each branch pipe 39 branched from the main water supply pipe 35 is closed.
The electromagnetic water supply valves 41 ₁ to 41 o of ₁ to 39 _o are opened by an opening command from a control unit (not shown ₎ . Then, the sea level L1 and the aquaculture tank 34 ₁ in the floating body 30
Seawater flows from the check valve ₃₇ to the main water supply pipe 35 due to the siphon effect due to the pressure head difference between the
From this, the water flows into the respective culture tanks 34 ₁ - 34 _o through branch pipes 39 1 - 39 o and water supply valves _{41 1} - _{41 o} . And each culture tank 3
When the water level within 4 ₁ to 34 _o reaches a preset level L2, this is detected by a liquid level sensor (not shown).
The control unit detects each water supply valve 4 through
1 ₁ to 41 _o are given a close command and closed, and the aquaculture tank 34
₁ to 34 _o Stop injecting seawater by siphon effect. In this case, the water surface level L2 of each culture tank 34 ₁ to 34 _o is set below the level obtained by subtracting the pressure head of the water supply line and the wave height value due to the rocking of the floating body 30 from the sea surface level L1.

The backup water supply line including the backup water supply pipe 36 and the branch pipes 40 ₁ to 40 _o branched from it is used for removal of living organisms attached to the piping of the main water supply line or when repairing or replacing the main water supply line. The procedure for its use is the same as for the main water supply line.

Next, a case will be described in which the seawater in each of the culture tanks 34 ₁ to 34 _o is replaced with ocean seawater.

The seawater supplied from the main water supply line to each culture tank 34 ₁ to 34 _o by the siphon effect is maintained at a set level L2 necessary to maintain the buoyancy of the floating body 30 at a required value during fish and shellfish culture. Although it has been
In order to prevent oxygen depletion in fish and shellfish, replace the water with ocean seawater as appropriate. In this case, the control unit opens the suction solenoid valves 45 ₁ to 45 _o and the discharge solenoid valves 48 ₁ to 48 _o of the main drainage system, and starts each of the drainage pumps 47 ₁ to 47 _o . The seawater in each culture tank 34 ₁ - 34 _o is discharged into the ocean through the main drain pipes 43 ₁ - 43 _o for suction and the main drain pipe 50 for discharge. Furthermore, when the water level in each culture tank 34 ₁ to 34 _o falls below a set level (low level) lower than level L2 due to the drainage operation, the control unit detects this and starts draining pumps 47 ₁ to 34 o.
Give a stop command to 47 _o , and drain valve 45 ₁ ~
45 _o and 48 ₁ to 48 _o are closed. At the same time, the water supply valves 41 ₁ to 41 _o of the main water supply line are opened to inject new seawater from the ocean into each culture tank 34 ₁ to 34 _o by a siphon effect.

In this way, the seawater in each culture tank is replaced (water exchanged) at predetermined time intervals, making it possible to cultivate fish and shellfish on a large scale in the culture tanks completely isolated from the ocean.

Further, the rate at which seawater is exchanged into each of the culture tanks 34 ₁ to 34 _o varies depending on the type of fish and shellfish to be cultured, but for example, in the case of coho salmon, it is approximately once per hour. Moreover, the water exchange in each culture tank may be performed by continuous operation instead of intermittent operation as described above.

The preliminary drainage line including the preliminary drainage pipes 44 ₁ to 44 _o , 51 and the drain valves 46 ₁ to 46 _o , 49 ₁ to 49 _o is used for removing living things etc. attached to the piping of the main drainage line or for cleaning the main drainage line. Used when repairing, replacing, etc.

Next, the operation of the emergency air blower 57 will be described.

If the drainage pumps 47 1 to 47 _o for displacing the seawater in each aquaculture tank 34 ₁ to 34 _o break down, a flow switch (not shown) installed on the discharge side of each drainage pump _{47 1 to} 47 _o ), the air valves 59 ₁ to 59 _o of the air supply system corresponding to the aquaculture tank to which the malfunctioning drainage pump belongs are opened, and at the same time, the air blower 57 is activated. Then, the compressed air from the air blower 57 is sent under pressure to the nozzle pipes 60 ₁ - 60 _o through the opened air valves 59 ₁ - 59 _o and the air supply pipes 58 ₁ - 58 _o , and air is supplied from each nozzle port of the nozzle pipe. By spouting out a circulating flow in the culture tanks 34 ₁ to 34 _o , oxygen is supplied to the seawater and the fish and shellfish in the culture tanks are prevented from dying.

In the above-mentioned embodiment, surplus tankers and the like are used for secondary purposes, so the hull, hold, and oil tank can also be used as floating bodies and aquaculture tanks for aquaculture, and can also be used as a feed warehouse and for fish and shellfish. It is possible to construct a large-scale aquaculture facility including storage and processing equipment at low cost, and by retaining the navigation function as a tanker, it is possible to move freely in search of water at the optimum temperature for aquaculture, as shown in Figure 1 above. Effects similar to those of the embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, an aquaculture floating body made of a tanker, a barge, etc. and movable on the ocean, an aquaculture tank formed inside the aquaculture floating body and isolated from the ocean, and a culture tank and an ocean a water supply and drainage route for injecting and draining water into the aquaculture tank by communicating with the aquaculture tank and using a siphon effect due to a pressure head difference between the sea surface and the aquaculture tank, and the other for injecting and discharging seawater into the aquaculture tank. The water supply and drainage route and the water supply and drainage means communicate with the aquaculture tank and the ocean side via the upper part of the aquaculture tank, and the aquaculture floating body is provided with a control unit installed therein. The water supply and drainage route is provided with an electromagnetic valve for water supply or drainage and a check valve that opens in the seawater injection direction, and the water supply and drainage means is provided with a water supply or drainage pump provided on the upper part of the aquaculture floating body. A liquid level sensor for detecting the internal seawater level is installed in the aquaculture tank, and the control unit receives a detection signal from the liquid level sensor or replaces the seawater in the aquaculture tank with ocean seawater. The system is configured to control the opening/closing of the electromagnetic valve for water supply or drainage and the operation/stopping of the water supply or drainage pump based on the command at the time.
When injecting seawater into the aquaculture tank or discharging seawater from the aquaculture tank into the sea, the control unit controls the water supply based on the detection signal from the liquid level sensor or the command when replacing the seawater in the aquaculture tank with seawater from the ocean. Alternatively, it becomes possible to reliably control the electromagnetic valve for drainage, the check valve that opens in the direction of seawater injection, and the pump for water supply or drainage, which has the effect of introducing and replacing seawater in the aquaculture tank at low cost. be.

[Brief explanation of drawings]

FIGS. 1a and 1b are schematic cross-sectional views showing the basic structure of the floating aquaculture apparatus of the present invention. FIG. 2 is an overall schematic diagram showing an example of the case where the aquaculture device of the present invention is applied to a tanker. FIG. 3 is a configuration diagram of a conventional aquaculture device. Explanation of symbols of main parts, 10, 30...Floating body,
11,34 ₁ to 34 _o ...Aquaculture tank, 13,35...Water pipe, 14,37,38...Check valve, 15,
41 ₁ ~ 41 _o ... Water supply valve, 16, 47 ₁ ~ 47 _o
...Drain pump, 17, 18, 43 ₁ ~ 43 _o , 44
₁ to 44 _o ...Drain pipe, 19...Control unit, 20...
Liquid level sensor.

Claims (1)

[Scope of Claims] 1. A floating body for aquaculture made up of a tanker, a barge, etc. and movable on the ocean, an aquaculture tank formed within the floating body for aquaculture and isolated from the ocean, and a communication between the aquaculture tank and the ocean. and a water supply/drainage path for either injecting or draining water into the aquaculture tank using a siphon effect due to a pressure head difference between the sea surface and the aquaculture tank, and a water supply/drainage means for injecting seawater into the aquaculture tank or draining seawater on the other hand. The water supply and drainage route and the water supply and drainage means communicate the aquaculture tank with the ocean side via the upper part of the aquaculture tank, and a control unit is installed on the aquaculture floating body, and the water supply and drainage means The path is provided with an electromagnetic valve for water supply or drainage and a check valve that opens in the seawater injection direction, and the water supply and drainage means is provided with a water supply or drainage pump provided on the upper part of the aquaculture floating body, and the aquaculture A liquid level sensor is installed in the tank to detect the internal seawater level, and the control unit receives a detection signal from the liquid level sensor or a command when replacing seawater in the aquaculture tank with seawater from the ocean. A floating aquaculture device characterized by being configured to control opening/closing of the electromagnetic valve for water supply or drainage and operation/stop of the water supply or drainage pump based on the above.