JP4466915B2 - Apparatus for preventing aquatic organisms from growing on the bottom of a ship - Google Patents

Description

  The present invention relates to a device for preventing aquatic organisms such as barnacles and laver and garbage from being deposited on the bottom of a ship, and in particular, preventing the formation of aquatic organisms by causing a water flow near the bottom of the ship. The present invention relates to a device for preventing aquatic organisms from landing on the bottom of the ship.

Aquatic organisms such as barnacles and mussels and seaweeds such as seaweed and algae attach to the bottom of ship boats, various port facilities, fish nets and ginger nets, etc. This will cause deterioration of the function and durability of the facility.
Especially for ship boats, aquatic organisms attached to the bottom of the ship may cause deterioration of driving performance and fuel consumption, so the ship should be periodically landed to remove aquatic organisms attached to the bottom of the ship. The cost for this has become the burden of the shipowner.
Of course, the paint that has the property of repelling aquatic organisms has been applied to the bottom of the ship, but the repellent action decreases with time. It is necessary to repaint, and the cost for this is still borne by the shipowner. In addition, since repellent components such as cuprous oxide and organic tin contained in such repellent paints are harmful to living organisms, there is concern about environmental pollution caused by the fact that these repellent components flow into seawater.

  By the way, the aquatic organisms, in particular, barnacles, settle on the bottom of the ship and hardly occur during the voyage, but only occur while anchored at a port or the like. This is because a certain amount of water flow is required for the Cypris larvae floating in the water to adhere to the ship bottom, and if the water flow is too fast, the lime content secreted by the Cypris larvae will not solidify even if it adheres to the ship bottom. . In general, the Cypris larva is said to have favorable conditions for the formation of a water flow of about 5 to 8 cm / s. The condition will be met.

From such a background, the present applicant has already developed a device that can reliably prevent aquatic organisms from growing on the bottom of a boat without causing environmental pollution. The application has been extended (see Patent Document 1). As shown in FIGS. 1 and 2, this apparatus comprises an ejection pipe 1 for ejecting fluid and a pump 2 for supplying fluid to the ejection pipe 1, and is formed in the ejection pipe 1. By directing the fluid from the spout 10 to the ship bottom 76, the water flow J is generated in the vicinity of the ship bottom 76 to prevent the attachment of aquatic organisms, particularly the cypris larvae of barnacles. Even in the case of stagnation, the lime content secreted by the Cypris larvae is prevented from solidifying, so that the aquatic organisms and the garbage can be effectively prevented from growing on the bottom 76.
As described above, the inventor has developed a new aquatic organism adhesion prevention device and has continued to improve the device thereafter.
Japanese Patent Application No. 2003-122600

  The present invention has been made as part of such persistent research and development, and in particular causes a water flow that is inconvenient for attachment and settlement of aquatic organisms on the bottom of a boat, and stabilizes the attitude of the ejection pipe. Therefore, it is possible to prevent the aquatic organisms from accumulating on the new ship bottom, etc., which can prevent the aquatic organisms from accumulating more reliably and reduce the running cost while maintaining the effect of preventing the aquatic organisms. The development of the device and the method for preventing the formation is a technical issue.

That is, the apparatus for preventing aquatic organisms on the bottom of the ship according to claim 1 is a device for preventing the aquatic organisms from being settled on a part of the ship's bottom such as a ship's bottom that is constantly submerged in water. It comprises a jet pipe for jetting fluid and a pump for supplying fluid to the jet pipe, and directing the fluid from the jet port formed in the jet pipe to the ship bottom, A water flow is formed in the vicinity of the ship bottom , and the jet pipe is formed by forming a jet outlet in a side peripheral portion of the long tubular body, and a fluid supply conduit connected to the jet pipe The jet pipe is suspended in a tilted state so that the side is positioned below, and the ejection pipe is held in a suspended state below the ship bottom by a holding tool .
According to the present invention, the aquatic organisms, particularly the barnacles of cypris larvae are prevented from adhering by the water flow generated in the vicinity of the ship bottom. In order to prevent solidification of lime content, it is possible to effectively prevent aquatic organisms and garbage from accumulating on the ship bottom.
In addition, the ejection pipe can be easily positioned below the bottom of the ship, and the attitude of the ejection pipe in water can be stabilized.
Furthermore, the flow of fluid, particularly gas, in the ejection pipe is improved, and gas ejection from a plurality of ejection ports is performed uniformly.

Further, the apparatus for preventing aquatic organisms on the bottom of the ship according to claim 2 is a device for preventing the aquatic organisms from being settled on a portion of the ship's bottom such as a ship's bottom that is constantly submerged in water. It comprises a jet pipe for jetting fluid and a pump for supplying fluid to the jet pipe, and directing the fluid from the jet port formed in the jet pipe to the ship bottom, A water flow is formed in the vicinity of the ship bottom, and the jet pipe is formed by forming a jet outlet in a side peripheral portion of the long tubular body, and a fluid supply conduit connected to the jet pipe It is installed in an inclined state so that the side is positioned below, and the jet pipe is installed so that it can be positioned below the ship bottom with respect to the quay or the sea floor. It consists of.
According to the present invention, the aquatic organisms, particularly the barnacles of cypris larvae are prevented from adhering by the water flow generated in the vicinity of the ship bottom. In order to prevent solidification of lime content, it is possible to effectively prevent aquatic organisms and garbage from accumulating on the ship bottom.
In addition, the flow of fluid, particularly gas, in the ejection pipe is improved, and gas ejection from a plurality of ejection ports is performed uniformly.

Furthermore, in addition to the requirements of claim 1 , the apparatus for preventing aquatic organisms from landing on the ship bottom or the like according to claim 3 is characterized in that the ejection pipe is provided with a stabilizer.
According to the present invention, the ejection pipe can be easily positioned below the ship bottom, and the attitude of the ejection pipe in water can be stabilized.

Furthermore, in addition to the above requirements, the apparatus for preventing aquatic organisms on the ship bottom or the like according to claim 4 is characterized in that the fluid ejected from the ejection pipe is a gas or a liquid.
According to this invention, when gas is ejected from the ejection pipe, the gas becomes bubbles in the water, and a water flow can be generated in the vicinity of the ship bottom along with the movement of the bubbles.
Further, since the bubbles rise along the bottom of the ship, a water flow can be generated over a wide area of the bottom of the ship. Furthermore, when liquid is ejected from the ejection pipe, a water flow can be generated near the bottom of the ship by the liquid. Especially when fresh water is used as the liquid, an environment that is extremely unsuitable for survival for marine aquatic organisms is generated near the bottom of the ship. Since it forms, aquatic organisms can be effectively prevented from growing.

The settlement method of preventing aquatic organisms to ship bottom or the like of the fifth aspect, using the anti-adhesion device of claim 1, 2, 3 or 4, wherein the intermittent ejection of fluid from the spout of the jet pipe It is characterized by what is done automatically.
According to this invention, the power consumption of the pump can be reduced and the running cost can be reduced.
The above problems can be solved by using the configuration of the invention described in each of the claims as a means.

  According to the present invention, it is possible to surely prevent the aquatic organisms from accumulating by causing a water flow that is inconvenient for the adhesion and the aquatic organisms to adhere to and adhere to the bottom of a ship.

  One of the best modes of the apparatus for preventing aquatic organisms on the ship bottom and the like of the present invention and the method for preventing the agglutination is as described in the embodiments shown in the following. It should be noted that this embodiment can be modified as appropriate within the scope of the technical idea of the present invention.

Hereinafter, the present invention will be described based on illustrated embodiments. Those shown in reference numeral D is is an incoming raw preventing device, this compound and jet pipe 1 for injecting a fluid, which consists comprises a pump 2 for supplying fluid to this jet pipe 1 It is. In the present specification, the description will be made on the assumption that the anti-seedation device D of the present invention is applied to a boat 7 that sails on the ocean and anchors at a port.
In this description, first, a reference example for understanding the operation principle of the anti-growth apparatus D of the present invention will be described, and thereafter each embodiment in which the form of the anti-growth apparatus D of the present invention is varied will be described. The explanation will be given separately.

[A. Reference example using a hose as an ejection pipe)
First, a reference example using a hose as the ejection pipe 1 will be described. The anti-growth apparatus D shown in this reference example supplies a fluid to the ejection pipe 1 and the ejection pipe 1 as shown in FIG. A pump 2 and a pipe line 3 for carrying out the operation, a holder 5 for positioning the jet pipe 1 below the bottom 76 of the vessel 7, and a stabilizer 6 for stabilizing the attitude of the jet pipe 1 It is made up of.
Hereinafter, members constituting the anti-seeding device D will be described in detail.

First, the jet pipe 1 is a member for generating a water flow J in the vicinity of the ship bottom 76 by jetting a fluid toward the ship bottom 76. In this reference example, the water jet resistance is excellent and flexible as an example. An air hose made of urethane, nylon or other material is used. The tip portion is used as a jet outlet 10. In this reference example, as shown in FIGS. 1, 3, and 4, two jet pipes 1 are connected to one branch pipe 11 and the branch pipe 11 is connected. The pipe line 3 is connected to a total of twelve spouts 10. Note that the same air hose as the ejection pipe 1 was used for the pipe line 3.

  Further, the jet port 10 is formed by cutting the end portion of the jet pipe 1 in a circular state as shown in FIG. 3, and the end portion of the jet pipe 1 is obliquely cut as shown in FIG. 5 (a). And can be formed. Further, a nozzle 12 in which a jet port 10 is formed may be attached to the jet pipe 1, and the one shown in FIG. 5 (b) is that the jet port 10 has a small diameter by a tapered nozzle 12. Yes, what is shown in FIG. 5 (c) is one in which the jet nozzle 10 has a large diameter by a tapered nozzle 12.

Next, a description will be given of the holder 5 which is a member for holding the jet pipe 1 in a state of being positioned below the ship bottom 76. As shown in FIG. 3, this is formed by applying a wire rope as an example. The upper wire 51 and the lower wire 52 are connected in parallel to the rope 50 with an appropriate interval, and another rope 50A is connected to the connecting portion between the rope 50 and the upper wire 51 as shown in FIG. It is composed. The rope 50 is made of, for example, nylon having high seawater resistance as a material.
Then, the branch pipe 11 is connected to the lower wire 52 by using a binding band 53 as appropriate, and the vicinity of the jet outlet 10 in the jet pipe 1 is connected to the upper wire 51. As shown in FIGS. 1 and 2, the other ends of the ropes 50 and 50 </ b> A are tied to the four fixed pieces 54 attached to the front, rear, left and right of the deck 72, and the middle part of the pipe line 3 connected to the pump 2 is connected. Then, it was bundled together with the rope 50 or the rope 50A by using a binding band 53 as appropriate.

Further, as shown in FIG. 4, the upper wire 51 is provided in a parabolic shape or a suspended curve shape, and a plurality of suspension members 51a are provided on the upper wire 51, and the lower wire 52 is suspended at the lower end of each suspension member 51a. It is also possible to adopt a suspended bridge-like configuration.
And the said branch pipe 11 is connected to the lower wire 52 using the binding band 53 suitably, and the jet nozzle 10 vicinity in the said jet pipe 1 is connected to the suspension material 51a.

Further, as shown in FIGS. 3 and 4, the jet pipe 1 or the wires (the upper wire 51 and the lower wire 52) for holding the jet pipe 1 may include a fin-like stabilizer 17 as an example. In this embodiment, four stabilizers 17 are fixed to the side periphery of the sleeve 17a, and the wire is inserted into the sleeve 17a and fixed. Of course, the number, shape, and installation direction of the stabilizers 17 can be appropriately changed as shown in FIG.
As will be described later, when a long tube is used as the ejection tube 1, the stabilizer 17 can be directly fixed to the long tube as shown in FIGS.
By providing such a stabilizer 17, when the fluid is ejected from the ejection port 10, it is possible to prevent the posture of the ejection pipe 1 from collapsing due to the reaction.

  Next, the stabilizer 6 will be described. This is a member that is attached to the lower end of the rope 50 in a suspended state as shown in FIGS. It is. In order to keep the lengths of the upper wire 51 and the lower wire 52 constant, the stabilizer 6 requires a certain amount of weight. When the stabilizer 6 is insufficient in weight, an appropriate weight is used. 61. In this embodiment, as shown in FIG. 7, the shape of the stabilizing plate 6 is taken as an example, and a shape having a conical portion at the center of one surface of the disk portion is used in order to reduce resistance to tidal current.

The anti-growth apparatus D as a reference example is configured as described above as an example, and the operation mode of this apparatus will be described below.
Here, a brief description will be given of the configuration of the marine vessel 7 which is an example of the application target of the anti-seedation device D. In this case, a deck 72 is formed above the hull 71 as shown in FIGS. Further, the lower surface of the hull 71 has a keel 73 near the center, a ladder 74 on the stern side, and a screw 75 in front of the ladder 74. A portion of the outer surface of the hull 71 that is submerged below the water surface WL is referred to as a ship bottom 76.

  Then, when the ship 7 finishes its voyage and returns to the port, the anti-growth prevention device D is set, and the rope 50 and the rope 50A are respectively connected to the four fixed pieces 54 provided on the front, rear, left and right of the deck 72. The ejection pipe 1 is held in a suspended state below the ship bottom 76 and the pipe 3 is connected to the pump 2. Although the anti-growth device D may be loaded on the vessel 7, the attachment to the vessel 7 can be facilitated if it is attached to the pier P with the jet pipe 1 immersed in the sea. is there.

When such setting is completed, the pump 2 mounted on the boat 7 is started, and the air compressed by the pump 2 passes through the conduit 3 to the ejection pipe 1 and soon becomes the ejection outlet. 10 is ejected. The air ejected from the ejection port 10 becomes bubbles B in the water and is directed to the ship bottom 76, and ascends in the sea and eventually reaches the ship bottom 76.
In addition, you may make it supply the air with respect to each ejection pipe | tube 1 by shifting timing by using an electromagnetic valve etc. suitably.
Further, the ejection of the fluid from the ejection port 10 in the ejection pipe 1 may be performed intermittently, the pump 2 is started intermittently, or the compressed air obtained by the pump 2 is accumulated in a cylinder or the like. The valve provided between the cylinder and the pipe line 3 is opened and closed intermittently.

  A water flow J is generated in the vicinity of the ship bottom 76 due to the gas lift pump effect accompanying the rise of the air bubbles B, and the movement of the water flow J and the air bubbles B causes the attachment of garbage and aquatic organisms, particularly cypris larvae of barnacles. To prevent. Even if cypris larvae are attached, the lime content secreted by the cypris larvae is washed away to prevent its coagulation, so that aquatic organisms can be effectively prevented from growing on the bottom 76. At this time, the air bubbles B also rise along the surface of the ship bottom 76, the keel 73, the ladder 74, the screw 75, etc., so that the aquatic organisms are prevented from accumulating over a wide range of members located in the sea. It is something that can be done.

[B. Example using a long tubular body as the ejection pipe]
Next , an embodiment of the anti-growth apparatus D of the present invention using a long tubular body as the ejection pipe 1 will be described. In addition, description about the part which is common in the reference example mentioned above is abbreviate | omitted here.
Hereinafter, members constituting the anti-seeding device D will be described in detail.
First, the ejection pipe 1 is formed by applying a long tubular body having the same length as that of the boat 7, and a plurality of ejection openings 10 are formed along the longitudinal direction thereof. In this embodiment, as shown in FIG. 9, a plurality of holes are formed at appropriate intervals along the longitudinal direction of the ejection pipe 1, and small diameter pipes 13 are connected to the individual holes, respectively. Thirteen openings were used as the nozzle 10. The shape of the small diameter tube 13 may be a tapered shape or a tapered shape like the nozzle 12 shown in FIG.

Further, as shown in FIG. 9 (b), a plurality of such ejection ports 10 may be formed in the side peripheral portion of the ejection pipe 1.
Further, as shown in FIG. 9 (c), a lid 13a is provided at the outlet 10 of the small diameter tube 13 so that it can be freely opened and closed. When the atmospheric pressure in the small diameter tube 13 reaches a predetermined pressure, the lid 13a rotates to It is also possible to adopt a configuration that allows the ejection of air from the outlet 10. Incidentally, the predetermined pressure can be adjusted by varying the weight of the weight 13b attached to the lid 13a.

Moreover, the said ejection pipe 1 can take various forms, and what is shown to Fig.10 (a) makes the hole drilled with respect to the pipe-shaped ejection pipe 1 into the ejection port 10. FIG. .
In addition, the ejection pipe 1 shown in FIG. 10B has a slit formed in the entire longitudinal direction of the ejection pipe 1, and this slit serves as the ejection outlet 10. Such a slit is formed by an appropriate method such as cutting a part of a pipe or combining plate materials as shown in the enlarged sectional view of FIG.
Furthermore, as shown in FIG. 10 (c), by forming a jet pipe 1 by combining a plurality of pipes having different lengths, the fluid jetted from the jet outlet 10 at the tip of each pipe line It is also possible to adopt a configuration in which the positions are different.
Furthermore, as shown in FIG. 10 (d), an adjustment plate 14 may be provided above the ejection port 10 to disperse the bubbles B.

  Further, a connecting member for connecting the rope 50 and the rope 50A as the holder 5 is provided at an appropriate portion of the jet pipe 1, and in this embodiment, an annular binding ring 15 is provided at both ends of the jet pipe 1 as an example. I prepared for the department.

  Furthermore, the posture of the ejection pipe 1 is stabilized by providing the stabilizers 6 at the lower ends of both ends of the ejection pipe 1. However, when the ejection pipe 1 itself has a certain weight, or the stabilizer 17. In the case where the posture is stabilized by providing, the stabilizer 6 is not necessary.

The anti-growth device D of the present invention shown in this embodiment is configured as described above as an example, and is connected to the ejection pipe 1 by shortening the rope 50 on the bow side as shown in FIG. By making the ejection pipe 1 in an inclined state so that the fluid supply pipe line 3 side is positioned below, the gas is particularly smoothly ejected.
[Other Examples]

While the invention is intended to be examples underlying real施例described above, it is also possible to adopt an embodiment as shown below, based on the technical concept of the present invention. First, various types of the holding tool 5 can be adopted, and the anti-growth apparatus D shown in FIG. 11 is configured such that the rope 50 used as the holding tool 5 is connected to the float 55. . In the case of adopting such a form of the holder 5, for example, an anti-growth prevention device D can be permanently installed at its own landing at a yacht harbor, and as shown in FIG. Are connected to each other by the connecting rod 56 so that the distance between the floats 55 can be kept constant and connected to the quay Q or the pier P. The fixed piece 54 may be attached to the pier P, and the rope 50 may be connected to the fixed piece 54.
Incidentally, in addition to using the pumps 2 mounted on the individual vessel 7 as shown by phantom lines in FIG. 11 (a), as shown by the solid lines in FIG. A fluid can also be supplied to the plurality of anti-growth prevention devices D.
In the case of a yacht harbor or the like in which a plurality of marine boats 7 are anchored in this way, it is possible to adopt a usage form in which an anti-seeding device D is permanently installed in a certain section and shared.

  In addition, as shown in FIG. 12, it is also possible to fix the ejection pipe 1 at a fixed position by using the pipe line 3 formed of a material having a relatively high strength as the holder 5. 12 is intended for a large marine vessel 7 that contacts the quay Q in parallel.

Furthermore, the use form which fixes the ejection pipe 1 in water can also be taken, and the thing shown to Fig.13 (a) fixes the ejection pipe 1 which applied the long tube body to the weights 57, such as a concrete block, as an example. This shows the form of this installation on the seabed.
Moreover, what is shown in FIG.13 (b) shows the form which fixed the ejection pipe 1 which applied the long tube body with respect to the pile 58 driven into the seabed.
Further, in FIG. 13 (c), the weight 57 and the ejection pipe 1 to which the long tubular body is applied are connected by an appropriate string body, and an underwater float 59 is further connected to the ejection pipe 1 by an appropriate string. By connecting with the body, the form which installed the jet pipe 1 in the seafloor state in the state which floated in water is shown.
Further, the one shown in FIG. 13D fixes the upper wire 51 and the lower wire 52 shown in FIGS. 3 and 4 to the pile 58 driven into the seabed, On the other hand, the reference form which fixes the jet pipe 1 which applied the hose is shown.

Also shown in FIG. 14 is a jet pipe block 16 formed by immersing a plurality of jet pipes 1 in concrete so that the jet outlets 10 protrude from the concrete surface, and the jet pipe blocks 16 are installed on the seabed. The form which was made is shown. Of course, in order to configure such a block body, resin or the like can be used in addition to the concrete, and the plurality of ejection pipes 1 may be held by an appropriate frame body.
Further, a box having the same outer shape as the jet pipe block 16 is formed of resin or metal, and a number of jets 10 are formed on the upper surface of the box, and a fluid is supplied from the pump 2 into the box. The box may be installed on the seabed.

Further, as a reference example of the anti-growth prevention device D of the present invention, when applied to a small boat 7 having an outboard motor 77, the stabilizer 6 is modified as an example as shown in FIG. Can be used. That is, as shown in FIG. 6 (b), a hole is formed in the flange portion of the stabilizing plate 6, and the tip of the pipe line 3 branched into three is inserted and fixed in this state. In this case, the pipe line 3 is caused to function as the ejection pipe 1, and the tip opening is used as the ejection outlet 10.

  Furthermore, the fluid ejected from the ejection pipe 1 can be a liquid. In this case, in order to generate the water flow J in the vicinity of the ship bottom 76, it is necessary to position the jet outlet 10 in the vicinity of the ship bottom 76 so as to reach the ship bottom 76 before the speed of the water flow J decreases. For this reason, the structure as shown in FIG. That is, as shown in FIG. 16 (a), the jet pipe 1 is formed in a lattice form so that the jet outlet 10 is positioned over a wide range so as to cover the entire ship bottom 76. As shown in FIGS. 16B and 16C, a water flow J is generated in the vicinity of the ship bottom 76 by the water flow J ejected from the jet port 10 toward the ship bottom 76. Can be prevented. In addition, when applying to marine vessel boats, if fresh water is supplied from the pump 2 provided on land, it is possible to form an environment that is difficult for marine aquatic organisms to survive near the bottom 76, It is possible to prevent the aquatic organisms from growing more effectively.

Furthermore, as a reference mode in which the fluid is directed to the ship bottom 76 from the jet nozzle 10 formed in the jet pipe 1, the jet pipe 1 is installed near the water surface WL as shown in FIG. It can also take the form of turning to the side. In this case, if the mixture of water and air is ejected from the ejection port 10, the air descends together with the water flow J and can reach the vicinity of the keel 73 relatively easily.

It is a side view which shows the state with which the reference example of the deposition prevention apparatus of this invention was mounted | worn with respect to the ship. It is a front view same as the above. It is a side view which shows an ejection pipe and a holder. It is a side view which shows the structure which made the upper wire the suspension bridge type. It is a perspective view which shows the various forms of a jet nozzle. It is a perspective view which shows the adhesion prevention apparatus comprised using the stabilizer and this thing. It is a front view which shows the various forms of a stabilizer. It is a side view which shows the state which mounted | wore the vessel boat with the anti-growth apparatus provided with the ejection pipe comprised with the long tubular body. It is the side view and sectional drawing which show a jet pipe same as the above. It is a side view partial perspective view and sectional view showing various forms of a jet pipe same as the above. It is the top view and front view which show the Example which suspends the ejection pipe | tube with a float. It is a front view which shows the Example which shares a pipe line and a holder. It is a side view which shows the Example which installs a jet pipe in the seabed. It is the side view, front view, and top view which show the form which applied the formation prevention apparatus provided with the ejection pipe block comprised with the several ejection pipe with respect to the ship. It is a side view which shows the state which mounted | wore the shipboat with the anti-seeding apparatus comprised using the stabilizer. It is the top view, side view, and front view which show the deposition prevention apparatus in the case of ejecting a liquid as fluid. It is a front view which shows the Example which performed the ejection of the fluid from an ejection pipe toward the downward direction.

D Anti-deposition device 1 Jet pipe 10 Jet port 11 Branch pipe 12 Nozzle 13 Small diameter pipe 13a Lid 13b Weight 14 Adjustment plate 15 Bundling ring 16 Jet pipe block 17 Stabilizer 17a Sleeve 2 Pump 3 Pipe line 5 Holder 50 Rope 50A Rope 51 Upper wire 51a Suspended material 52 Lower wire 53 Binding band 54 Fixed piece 55 Float 56 Connection rod 57 Weight 58 Pile 59 Underwater float 6 Stabilizing plate 61 Weight 7 Ship boat 71 Hull 72 Deck 73 Keel 74 Ladder 75 Screw 76 Outboard 77 B Bubble J Water current P Pier Q Quay WL WL Water surface

Claims (5)

In an apparatus for preventing aquatic organisms from accumulating at a part that is always submerged in water such as the bottom of a boat, the apparatus supplies an ejection pipe for ejecting fluid and fluid to the ejection pipe. And a pump configured to cause a water flow in the vicinity of the bottom of the ship by directing fluid from the outlet formed in the jet pipe to the bottom of the ship , and the jet pipe is long. It is formed by forming a jet outlet in the side peripheral portion of the pipe body, and is suspended in an inclined state so that the fluid supply pipe line side connected to the jet pipe is positioned below, An apparatus for preventing attachment of aquatic organisms to a ship bottom or the like, wherein the ejection pipe is held in a suspended state below the ship bottom by a holder . In an apparatus for preventing aquatic organisms from accumulating at a part that is always submerged in water such as the bottom of a boat, the apparatus supplies an ejection pipe for ejecting fluid and fluid to the ejection pipe. And a pump configured to cause a water flow in the vicinity of the bottom of the ship by directing fluid from the outlet formed in the jet pipe to the bottom of the ship, and the jet pipe is long. A jet outlet is formed in the side periphery of the pipe body, and is installed in an inclined state so that the fluid supply pipe line side connected to the jet pipe is positioned below; and The apparatus for preventing attachment of aquatic organisms to a ship bottom or the like, wherein the jet pipe is installed so as to be positioned below the ship bottom with respect to a quay or the sea bottom .   The apparatus according to claim 1, wherein the jet pipe includes a stabilizer. The fluid to be ejected from the ejection tube settlement prevention device of aquatic organisms to ship bottom or the like of claim 1, 2 or 3, wherein it is a gas or a liquid. A method for preventing aquatic organisms from accumulating on a ship bottom or the like, wherein the adhesion preventing device according to claim 1, 2, 3, or 4 is used to intermittently eject a fluid from an ejection port in the ejection pipe. .

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