JP2018011572A - Feeding device, culture apparatus, and feeding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding device, a culture apparatus and a feeding method capable of enhancing the eatability of a feeding object while transporting a feed in an airflow.SOLUTION: A feeding device 20 for feeding a feed to a crawl 10 dived and arranged under water level, comprises: a depot 21 for reserving granular feed; a transportation pipe 22 leading from the depot 21 to the crawl 10; an air flow generator 23 for forming an air flow from the depot 21 to the crawl 10 in the transportation pipe 22; and a terminal device 30 connected to the leading end of the transportation pipe 22 and dipped in the water of the crawl 10 thereby to discharge the feed into the water of the crawl 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a feeding device, an aquaculture device, and a feeding method.

  Conventionally, ginger is used for aquaculture of fishery products such as seafood. In addition to those anchored on the sea floor in the vicinity of ships and offshore structures (Patent Document 1), ginger is used in a state of being submerged in the sea (Patent Document 2).

In order to improve the efficiency of feeding the fish and shellfish contained in the ginger, an automatic feeding device is used (Patent Document 3).
In the automatic feeding device of Patent Document 3, a transport pipe extending from a storage tank storing granular feed to a fish farm is installed, and the feed is air-flowed through the transport pipe through the compressed air. And the tip of the transport pipe is placed in the air above the water surface of the fish tank and the feed is sprayed (aerial spraying method), or the tip of the transport pipe is placed in the water to release the feed (submerged release method) .

JP 9-294500 A JP 56-154940 A JP-A-2-207726

With the automatic feeding device as described in Patent Document 3 described above, feeding work in ginger aquaculture is made efficient. However, this apparatus has the following problems.
The water spraying method can be applied as it is to ginger floating on the water surface. However, when it is applied to a submerged ginger, there is a problem that work is lowered because the ginger is raised and fed and then submerged again.

  The underwater release method can also be applied to floating and submerged ginger. However, when carrying airflow, air is released together with feed into the ginger water. The air released into the water becomes bubbles, and there are many situations where fish and shellfish in the ginger mistake the bubbles as feed. As a result, there is a problem that proper feeding cannot be performed for fish and shellfish, and feeding ability is reduced.

  On the other hand, seawater is also used instead of compressed air as a transport medium in the transport pipe. However, when the seawater is passed through the transport pipe, organisms in the seawater adhere to the passage, increasing the maintenance burden. In addition, there is a problem that the feed is dissolved by seawater during the feed conveyance, and there is a problem that the conveyance energy is increased. Therefore, compressed air is desirable as the carrier medium regardless of the problem of bubbles.

Thus, although compressed air is desirable as a transport medium in the transport pipe, there has been a problem of a decrease in food intake due to the aforementioned misidentification of bubbles and feed.
In addition, when the tip of the transport pipe is placed in water, the feed is difficult to diffuse from the tip of the transport pipe, and does not reach the entire fish and shellfish to be fed, which may cause bias in feeding. In addition, if the diffusion is insufficient, there is a possibility that the food will be locally excessive, the fish and shellfish will not be able to be eaten, the surplus food will sink under the ginger, and waste of food may occur.
Furthermore, when the transportation is stopped, seawater may flow back into the transport pipe, and there is a possibility that it cannot be started up smoothly during the next transportation.

  An object of the present invention is to provide a feeding device, an aquaculture device, and a feeding method capable of enhancing feeding ability of a feeding target while air-feeding feed.

The feeding device of the present invention is a feeding device that supplies feed to a ginger that is submerged under the surface of the water, a storage tank in which granular feed is stored, a transport pipe that extends from the storage tank to the ginger, An airflow generator that forms a transport airflow from the storage tank to the ginger inside the transport pipe, and is connected to the tip of the transport pipe, is immersed in the ginger water, and releases the feed into the ginger water And a terminal device.
In such this invention, the feed of a storage tank can be carried by airflow to a ginger by a conveyance pipe and an airflow generator. In addition, by providing a terminal device immersed in ginger water at the tip of the conveying tube, it is possible to prevent misidentification of feed and bubbles in this terminal device or to diffuse the discharged feed, thereby providing a feeding target. Can improve the food intake.

In this invention, it is preferable that the deaeration apparatus which isolate | separates the said feed and air sent with the said conveyance pipe is formed in the said terminal device.
In such this invention, the feed and air sent to the terminal device with the conveyance pipe can be separated by the deaeration device. The separated air is discharged first from the deaerator. The discharged air generates bubbles in the water inside the ginger. This bubble can be in a different position from the feed discharged from the terminal device into the water. For this reason, it is possible to reduce the misidentification of air bubbles and feed for fish to be fed, etc., and to improve feeding ability.

In the present invention, it is preferable that the deaeration device is a large number of air holes communicating between the inside and the outside of the terminal device, and the inner diameter of the air holes is smaller than the average particle diameter of the feed.
In the present invention, air can be passed and feed can be prevented from passing through the air holes having an inner diameter smaller than the average particle size of the feed. Therefore, feed and air can be separated with a simple structure.
As such a large number of ventilation holes, a large number of holes may be formed in the plate material, or a large opening may be provided and the opening may be covered with a punching metal, an expanded metal, a metal mesh, or the like.

In the present invention, the terminal device is formed with a diffusing device for diffusing the feed fed by the transport pipe, and the diffusing device has an outer cone member and an inner cone member that expand downward, It is preferable that the said feed sent with the conveyance pipe is discharge | released through the space | interval of the said outer cone member and an inner cone member.
In the present invention as described above, the feed pipe is air-flow conveyed in this state by disposing the ginger-side tip of the conveying pipe and the terminal device downward, and the feed passes through the gap between the outer cone member and the inner cone member. Released into the ginger. That is, the discharge | released range can be expanded according to the expansion shape of an outer cone member and an inner cone member. As a result, the number of feeding subjects such as fish that can simultaneously consume the released feed can be increased, and the feeding property can be improved.

In the present invention, each of the outer cone member and the inner cone member has an inclination angle of each generatrix of 20 degrees or more with respect to a horizontal plane, and an interval between the outer cone member and the inner cone member is an average of the feed It is preferably at least twice the particle size.
In the present invention, since the inclination angle of the generatrix of the outer cone member and the inner cone member is set to 20 degrees or more with respect to the horizontal plane, for example, there is an inconvenience that the feed adheres and stays on the surface of the inner cone member. It can be prevented and smooth discharge can be performed.
Further, since the interval between the outer cone member and the inner cone member is set to be twice or more the average particle diameter of the feed, the feed is fixed and stays at the interval between the outer cone member and the inner cone member. Can be prevented and smooth discharge can be performed.

In this invention, it is preferable that the said airflow generation apparatus can generate | occur | produce the said airflow whose flow velocity in the said terminal device is 33 m / s or less.
In such this invention, the ratio which the crack and pulverization of a feed generate | occur | produce during airflow conveyance can be suppressed lightly because the flow rate in a terminal device shall be 33 m / sec or less. When the flow rate exceeds 33 m / sec, 10% or more of the feed reaching the terminal device may be broken or powdered. On the other hand, when the flow rate is 11 m or less per second, there is a possibility that the air current cannot be conveyed.

In this invention, it is preferable that the said airflow generation apparatus has discharge pressure more than the pressure equivalent to the product of the specific gravity of the water inside the said ginger, gravity acceleration, and the water depth of the said terminal device in the said ginger.
In such an invention, even when seawater in the ginger flows backward into the transport pipe during the suspension of the airflow conveyance, the airflow generated by the airflow generator is used to send in the seawater that has flowed in. Can be discharged.

The aquaculture device of the present invention includes a ginger that is submerged under the surface of the water and the above-described feeding device of the present invention.
In such this invention, the effect as demonstrated with the feeding apparatus of this invention mentioned above can be acquired.

The feeding method of the present invention is a feeding method for supplying feed to a ginger that is submerged under the surface of the water, a storage tank in which granular feed is stored, a transport pipe from the storage tank to the ginger, An air flow generator that forms a transport air flow from the storage tank to the ginger inside the transport pipe, and a terminal device connected to the tip of the transport pipe, the terminal device is immersed in the ginger water. In addition, the feed may be transported by forming a transport air flow inside the transport pipe with the air flow generator, and the transported feed may be discharged from the terminal device into the ginger water.
In such this invention, the effect as demonstrated with the feeding apparatus of this invention mentioned above can be acquired.

  According to the present invention, it is possible to provide a feeding device, an aquaculture device, and a feeding method capable of enhancing the feeding ability of a feeding target while air-feeding feed.

The figure which shows the whole structure of one Embodiment of this invention. Sectional drawing which shows the terminal device of the said embodiment. The disassembled perspective view which shows the terminal device of the said embodiment. The graph which shows the conveyance conditions of the said embodiment. The schematic diagram which shows the terminal device of other embodiment of this invention. The schematic diagram which shows the terminal device of other embodiment of this invention. The schematic diagram which shows the terminal device of other embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the aquaculture device 1 includes a plurality of ginger 10 submerged in the sea and a feeding device 20 that supplies feed to the ginger 10.

The ginger 10 has a water-permeable casing 11 formed in a box shape such as a wire mesh. In the case 11, instead of a wire net, a synthetic fiber net or a resin net may be used as long as water permeability can be obtained while surrounding the seafood to be bred. In order to form these nets in a box shape, an outer frame formed of metal, synthetic resin, rubber, or the like can be used.
The approximate shape of the housing 11 can be an arbitrary shape such as a rectangular parallelepiped shape or a cylindrical shape.
The casing 11 is surrounded by a wire mesh or the like, so that seawater can freely circulate inside and outside, and the seafood contained inside does not escape.
A part of the housing 11 is provided with a door for taking in and out seafood. Instead of the door, the net on the upper surface side of the housing 11 may be openable / detachable, or any structure that allows the fish and shellfish accommodated in the housing 11 to be taken in and out.

The ginger 10 has a buoy 12 that floats on the sea surface, and the housing 11 is suspended and supported by the buoy 12 through a suspension means that combines a button rope 13 or a button rope 13 and a side tension.
The housing 11 can be floated on the sea surface or submerged in the sea by allowing air to enter and leave the outer frame of the housing 11. The casing 11 at the normal time is held so that the upper surface of the casing 11 is between about 5 m and 15 m in depth according to the water depth of the installation sea area.
The buoy 12 is connected to the sea floor by a mooring line 14, and the buoy 12 and the casing 11 are placed at a predetermined position on the sea surface and in the sea.

A feeding device 20 is installed to automatically feed fish and shellfish cultivated in the ginger 10.
The feeding apparatus 20 forms a storage tank 21 in which granular feed is stored, a transport pipe 22 from the storage tank 21 to the ginger 10, and a transport airflow from the storage tank 21 to the ginger 10 inside the transport pipe 22. The airflow generator 23 and the structure 24 in which the storage tank 21 and the airflow generator 23 are installed are provided.
In addition, a terminal device 30 that discharges feed from the storage tank 21 that is immersed in the water of the ginger 10 and air-carryed through the transport pipe 22 to the water of the ginger 10 is connected to the tip of the transport pipe 22.

The structure 24 is composed of a steel frame cage or the like, and is installed in the vicinity where the ginger 10 is placed. The lower part of the structure 24 is fixed to the seabed. The upper surface of the structure 24 is disposed on the sea surface. The structure 24 is not limited to a fixed structure, and a floating body such as a ship or a barge may be used. When a floating body is used as the structure 24, the structure 24 is fixed to the seabed with a mooring line or a anchor.
The storage tank 21 is configured by a so-called hopper or the like, and can store granular feed therein and can supply a predetermined amount of feed from a lower supply unit. The amount of feed supplied is controlled by a control device (not shown).

One end of the transfer tube 22 is connected to the supply unit of the storage tank 21, and the other end is introduced to the inside of the casing 11 of the ginger 10.
Since there are a plurality of cases 11, the other end of the transfer tube 22 is also branched into a plurality. The branch of the conveyance pipe 22 may be a supply part of the storage tank 21, may be in the middle of the ginger 10, or may be in the vicinity of the ginger 10. Or it is good also as a structure branched for every housing | casing 11 in the position adjacent to the ginger 10. FIG.

The portion from the structure 24 of the transport pipe 22 to the ginger 10 may be held in a state of floating on the sea surface, may be held in the sea at a predetermined depth, or may be installed on the seabed.
For example, if the conveyance pipe 22 is substantially the same as the specific gravity of seawater, buoyancy can be obtained by the air passing through the inside, and the buoyancy can be lifted up alone on the sea surface. Even when the specific gravity of the transport pipe 22 is larger than seawater, it can be floated on the sea surface by connecting a floating body. On the other hand, in the case of being held in the sea or on the seabed, in order to maintain the current position, it may be fixed to the seabed with a mooring cable or anchor, or may be moored on a buoy or the like arranged on the nearby sea.
A portion of the transport pipe 22 in the vicinity of the ginger 10 is held in a state of floating on the sea surface by connecting to the buoy 12 in order to introduce the terminal device 30 from above the ginger 10. However, the portion near the ginger 10 of the transport pipe 22 may also be held in the sea or on the sea floor.

The airflow generator 23 is composed of an electric motor or an engine-driven air compressor, and supplies the compressed air to one end of the transport pipe 22 so that the feed from the supply unit of the storage tank 21 flows toward the ginger 10. Can be transported.
The airflow generator 23 has a discharge pressure equal to or higher than the pressure corresponding to the product dgH as the specific gravity d of water in the ginger 10, the gravitational acceleration g, and the water depth H of the terminal device 30 in the ginger 10.
The air flow generator 23 is controlled so that the supply of compressed air is controlled by a control device (not shown), and the air flow rate in the terminal device 30 connected to the other end of the transport pipe 22 is adjusted to be greater than 11 m / sec and less than 33 m / sec. Is done.

The terminal device 30 is connected to the distal end of the transport pipe 22 that is disposed downward in the sea inside the casing 11 of the ginger 10.
As shown in FIGS. 2 and 3, the terminal device 30 includes a connection pipe 31 connected to the transport pipe 22, an outer cone member 32 whose apex portion is connected to the connection pipe 31, and an inner side of the outer cone member 32. And an arranged inner cone member 33. The inner cone member 33 is supported on the inner surface of the outer cone member 32 via a plurality of support members 34.

In the outer cone member 32 and the inner cone member 33, the inclination angle θ of each generatrix is 45 degrees with respect to the horizontal plane. This angle θ is desirably 20 degrees or more so that feed does not stay on the surface of the inner cone member 33.
A predetermined distance C is provided between the outer cone member 32 and the inner cone member 33. This interval C is preferably at least twice the average particle size of the feed conveyed by the conveying tube 22.

In the terminal device 30, when the feed is air-flowed from the transport pipe 22, the feed is discharged to the lower surface of the terminal device 30 through the interval between the outer cone member 32 and the inner cone member 33. At this time, the discharged feed is diffused radially outward by the inner cone member 33.
The outer conical member 32 and the inner conical member 33 constitute the diffusing device of the present invention.

In the upper part of the outer conical member 32, a large number of air holes 35 penetrating the front and back are formed in a band-like region around the entire circumference.
The belt-like region in which the vent hole 35 is formed has a lower end that is the height of the upper end of the inner cone member 33.
The air holes 35 are formed so that the inner diameter is smaller than the average particle diameter of the feed that is air-flow conveyed by the conveying pipe 22, and the feed cannot pass through.

In such a terminal device 30, the air used for airflow conveyance is discharged to the outside of the outer cone member 32 through the air holes 35 and rises to the sea surface as bubbles. On the other hand, the conveyed feed is discharged below the terminal device 30 as described above.
Therefore, the seafood in the ginger 10 can easily distinguish the bubbles rising from the upper part of the terminal device 30 and the feed discharged from the lower surface of the terminal device 30.
The deaeration device of the present invention is formed by such a large number of vent holes 35.

Note that the lower end of the region in which the vent hole 35 is formed may be above the upper end of the inner cone member 33, and in order to obtain the desired deaeration performance, the height dimension of the region (outer cone member) It is desirable to obtain a dimension along the 32 busbars of 5 cm or more.
In addition, the lower end of the region can be lower than the upper end of the inner cone member 33. However, if the inner cone member 33 is exposed to the gas phase portion of the airflow conveyance from the conveyance pipe 22, the conveyed feed collides with the inner cone member 33 and causes damage to the feed, so that exposure is minimized. It is desirable to make it.

In this embodiment as described above, when it is time for automatic feeding, the feeding device 20 is activated and feeding into the ginger 10 is performed.
In feeding, compressed air is supplied from the airflow generator 23 to one end of the transport pipe 22 while feed is supplied from the storage tank 21 to one end of the transport pipe 22. As a result, the feed is air transported to the ginger 10 through the transport pipe 22.
The feed that has been air-flow conveyed by the conveyance pipe 22 is introduced into the terminal device 30 and air is separated by the vent holes 35 that are deaeration devices.
In the terminal device 30, deaeration is performed in the region of the vent hole 35, so that a portion below this, that is, an interval between the outer cone member 32 and the inner cone member 33 enters from the opening on the lower surface side of the terminal device 30. Seawater filled.
The feed from which the air has been separated is dropped into seawater filled with a space between the outer cone member 32 and the inner cone member 33, sinks gently in the seawater, and is released below the terminal device 30.

When the automatic feeding for a predetermined time is completed, the feeding device 20 stops the air current conveyance.
When the air flow conveyance is stopped, the pressure of the conveyance air in the terminal device 30 is released, and the seawater flows back to the inside of the conveyance pipe 22 through the connection pipe 31 and enters. However, the intrusion of seawater into the transport pipe 22 is only at a portion under the sea surface of the transport pipe 22.
At the time of the next automatic feeding, the seawater in the transport pipe 22 prevents airflow transport. However, in the airflow generation device 23 of the present embodiment, the discharge pressure is equal to or higher than the pressure corresponding to the product dgH as the specific gravity d of water in the ginger 10, the gravitational acceleration g, and the water depth H of the terminal device 30 in the ginger 10. It is said that. For this reason, the seawater which has entered the transport pipe 22 is pushed out, the conduction of the transport pipe 22 is automatically restored, and the air current transport of the feed can be resumed.

The present embodiment as described above has the following operational effects.
In the present embodiment, the feed in the storage tank 21 can be conveyed to the ginger 10 by the conveyance pipe 22 and the airflow generation device 23. Moreover, by providing the terminal device 30 immersed in the water of the ginger 10 at the tip of the transport pipe 22, it is possible to prevent misidentification of feed and bubbles in the terminal device 30 or to diffuse the discharged feed, Thereby, the feeding property of a feeding object can be improved.

  In the present embodiment, air and feed sent to the terminal device 30 through the transport pipe 22 can be separated by the vent hole 35 (deaeration device). The separated air is discharged first from the vent hole 35. The discharged air generates bubbles in the water inside the ginger 10. This bubble can be in a different position from the feed discharged from the terminal device 30 into the water. For this reason, it is possible to reduce the misidentification of air bubbles and feed for fish to be fed, etc., and to improve feeding ability.

  In this embodiment, a large number of air holes 35 are formed in the outer conical member 32 of the terminal device 30, and the air holes 35 have an inner diameter smaller than the average particle diameter of the feed, so that only air passes through the air holes 35. Feed cannot be passed. Therefore, a deaeration device for separating feed and air can be configured with a simple structure.

  In this embodiment, the feed pipe 22 is disposed between the distal end of the ginger 10 and the terminal device 30 downward, and the feed is conveyed by airflow in this state, so that the feed is between the outer cone member 32 and the inner cone member 33. It is discharged into the ginger 10 through the gap. That is, the discharge | released range can be expanded according to the expansion shape of the outer cone member 32 and the inner cone member 33. FIG. As a result, the number of feeding subjects such as fish that can simultaneously consume the released feed can be increased, and the feeding property can be improved.

In the present embodiment, the vent hole 35 (a deaeration device) is formed in the upper part of the outer cone member 32, and the outer cone member 32 has a portion below the vent hole 35 (a portion corresponding to the outside) along the inner cone member 33. It extends.
Here, when the outer cone member 32 does not extend below the vent hole 35, the feed degassed by the vent hole 35 is caught in the flow of seawater rising from the air released from the vent hole 35 as bubbles. As a result, it does not diffuse downward along the inner conical member 33 and is scattered around. At this time, a part of the feed may flow out of the ginger and be lost accordingly. In addition, the feed that flows along the inner conical member 33 without being caught in the seawater flow can be smoothly ingested because fish and the like flock to the feed with the inner conical member 33 being an obstacle. There is a possibility of disappearing.
On the other hand, in this embodiment, since the outer cone member 32 extends below the vent hole 35, the degassed feed passes through the gap between the outer cone member 32 and the inner cone member 33, The terminal device 30 is sequentially discharged downward from the lower surface side. For this reason, a fish etc. can ingest feed while orderly swimming under the terminal device 30, and can improve feeding property.

In the present embodiment, since the inclination angle of the generatrix of the outer cone member 32 and the inner cone member 33 is 45 degrees with respect to the horizontal plane, for example, there is an inconvenience such as feed adhering to the surface of the inner cone member 33 and staying there. It can be prevented and smooth discharge can be performed.
In addition, since the distance between the outer cone member 32 and the inner cone member 33 is at least twice the average particle size of the feed, the feed is firmly fixed and retained at the interval between the outer cone member 32 and the inner cone member 33. It is possible to prevent inconvenience such as, and to perform smooth discharge.

In the present embodiment, the air supply amount of the airflow generation device 23 is adjusted, and the flow velocity at the terminal device 30 is greater than 11 m / sec and 33 m / sec or less. Thereby, the ratio which a crack and powdering of a feed generate | occur | produce during airflow conveyance can be suppressed lightly.
As shown in FIG. 4, when the flow rate exceeds 33 m / sec, 10% or more of the feed reaching the terminal device may be broken or powdered. On the other hand, when the flow rate is 11 m or less per second, there is a possibility that the air current cannot be conveyed.
Therefore, as in the present embodiment, it is preferable to adjust the flow rate at the terminal device 30 to be greater than 11 m / second and 33 m / second or less, thereby enabling proper airflow conveyance of the feed.

  In the present embodiment, the discharge pressure of the airflow generation device 23 is equal to or higher than the pressure corresponding to the product dgH as the specific gravity d of the water in the ginger 10, the gravitational acceleration g, and the water depth H of the terminal device 30 in the ginger 10. ing. As a result, even when the seawater in the ginger 10 flows backward into the transport pipe 22 during the suspension of the airflow transport, the airflow generated by the airflow generator 23 with sufficient discharge pressure causes the seawater that has flowed in. Can be discharged.

Note that the present invention is not limited to the above-described embodiments, and modifications and the like within a scope in which the object of the present invention can be achieved are included in the present invention.
In the embodiment, the vent hole 35 is formed in the outer conical member 32 of the terminal device 30 to form the deaeration device. The vent hole 35 as a deaeration device may be formed in another part of the terminal device 30.

  In the embodiment shown in FIG. 5, the terminal device 30 </ b> A includes a connection pipe 31, an outer conical member 32, and an inner conical member 33 similar to those of the above-described embodiment. In this embodiment, a large number of vent holes 35 are formed in a region of a predetermined length in the airflow direction on the peripheral surface of the connection pipe 31, thereby forming a deaeration device.

In the said embodiment, although the diffusion device was comprised by the outer cone member 32 and the inner cone member 33 of the terminal device 30, the outer cone member 32 and the inner cone member 33 as a diffusion device may be abbreviate | omitted.
In the embodiment shown in FIG. 6, the terminal device 30 </ b> B is constituted by a long connecting pipe 31 </ b> B, and a large number of ventilation holes 35 as deaeration devices are formed in a region extending over a predetermined length in the middle.
In such an embodiment, the function of diffusing the feed is not obtained, but the feed deaerated in the region of the vent hole 35 gently sinks in the seawater in the connection pipe 31B and exits the terminal device 30B. The effect of diffusing gently is obtained.

In the embodiment shown in FIG. 7, the terminal device 30 </ b> C has a cylindrical body 36 in which a punching metal is wound in a cylindrical shape connected to the tip of a connecting pipe 31 </ b> C connected to the transport pipe 22. Is configured.
In such an embodiment, deaeration is performed on the upper part of the cylindrical body 36, rising as bubbles to the sea surface, and the feed immersed in seawater is slowly released from the lower end of the cylindrical body 36. By making the length of the cylinder 36 sufficiently long, it becomes easy to distinguish between air bubbles and feed, and a function as a deaeration device can be sufficiently obtained while having a simple configuration in which a punching metal is wound.

  The present invention relates to a feeding device, a culture device, and a feeding method, and can be used for feeding fish and shellfish cultivated with ginger.

  DESCRIPTION OF SYMBOLS 1 ... Aquaculture apparatus, 10 ... Ginger, 11 ... Housing, 12 ... Buoy, 13 ... Button rope, 14 ... Mooring line, 20 ... Feeding device, 21 ... Storage tank, 22 ... Conveyance pipe, 23 ... Airflow generator, 24 ... Structure, 30, 30A, 30B, 30C ... Terminal device, 31, 31B, 31C ... Connection pipe, 32 ... Outer cone member, 33 ... Inner cone member, 34 ... Support member, 35 ... Vent, 36 ... Cylindrical body , C: spacing, d: specific gravity, g: gravitational acceleration, H: water depth, θ: angle.

Claims (9)

A feeding device that supplies feed to a ginger that is submerged under the water surface,
A storage tank for storing granular feed;
A transfer pipe from the storage tank to the ginger,
An airflow generator that forms a transport airflow from the storage tank to the ginger inside the transport pipe;
A feeding device comprising: a terminal device connected to a tip of the transport pipe, immersed in the ginger water, and discharging the feed into the ginger water. The feeding device according to claim 1,
The terminal device is provided with a deaeration device for separating the feed and air sent through the transport pipe. The feeding device according to claim 2,
The deaeration device is a large number of air holes communicating with the inside and outside of the terminal device,
The feeding device according to claim 1, wherein an inner diameter of the vent hole is smaller than an average particle diameter of the feed. In the feeding apparatus as described in any one of Claims 1-3,
In the terminal device, a diffusion device for diffusing the feed sent in the transport pipe is formed,
The diffusion device has an outer cone member and an inner cone member that expand downward, and the feed fed by the transport pipe is discharged through a space between the outer cone member and the inner cone member. Feeding device characterized by. The feeding device according to claim 4,
The outer cone member and the inner cone member each have an inclination angle of each generatrix of 20 degrees or more with respect to a horizontal plane,
An interval between the outer cone member and the inner cone member is at least twice the average particle size of the feed. In the feeding apparatus as described in any one of Claims 1-5,
The feeding device according to claim 1, wherein the airflow generation device is capable of generating the airflow with a flow velocity at the terminal device of 33 m or less per second. In the feeding apparatus as described in any one of Claims 1-6,
The feeding apparatus according to claim 1, wherein the airflow generation device has a discharge pressure equal to or higher than a pressure corresponding to a product of a specific gravity of water inside the ginger, a gravitational acceleration, and a water depth of the terminal device in the ginger.   An aquaculture device comprising: a ginger that is submerged under the surface of the water; and the feeding device according to any one of claims 1 to 7. A feeding method for supplying feed to a ginger that is submerged under the water surface,
A storage tank in which granular feed is stored, a transport pipe extending from the storage tank to the ginger, an airflow generator for forming a transport airflow from the storage tank to the ginger in the transport pipe, and the transport pipe A terminal device connected to the tip of the
The terminal device is immersed in the ginger water,
In the airflow generator, the feed is transported by forming a transport airflow inside the transport pipe,
The feeding method, wherein the transported feed is discharged from the terminal device into the ginger water.

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