JPH0924894A - Underwater hull fouling preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the sticking growth and propagation of marine organisms on the outer surface of a hull by covering the outer surface of the hull, particularly under the water surface, with a shading sheet in a device for preventing the fouling of the hull caused by the adhesion of marine organisms. SOLUTION: The upper edge part of a shading sheet 3 covering the outer surface of a hull 1 under the water surface of the moored hull 1 is removably mounted on the outer surface of the hull 1 by a magnet 4, and a weight 5 is mounted on the lower edge part of the sheet 3. A stainproofing agent is dissolved in sea water between the outer surface of the hull 1 and the shading sheet 3. The outer surface of the hull 1 under the water surface is thereby shut off from sunlight by the shading sheet 3, and the hull 1 is prevented from fouling caused by the sticking growth and propagation of marine organisms in combination with the presence of the stainproofing agent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing fouling of a hull due to adhesion of marine organisms, and more particularly, to prevent the hull from being contaminated under the water during a mooring period for outfitting a ship. A device suitable for use in.

[0002]

2. Description of the Related Art Conventionally, while mooring a ship under construction for a long period of time, marine life adheres to the hull under the surface of the water and grows and propagates. Therefore, even if an antifouling agent that prevents the generation of seaweeds and shellfish is included in the ship bottom paint, a sufficient effect is not obtained.

[0003]

As described above, the bottom of the hull constructed in the dock is conventionally coated with the anti-fouling agent, but the hull is pulled out from the dock and outfitted. When moored, the antifouling agent contained in the bottom paint melts and diffuses in the sea, and there is a problem that a sufficient antifouling effect cannot be obtained.Therefore, just before the test run, the hull is docked, washed and polished. Then, if necessary, a top coat was also applied, so that there was a problem that the period until the completion of the ship was prolonged and the cost was increased.

The present invention seeks to solve the problems as described above, and by covering the outer surface of the hull below the water surface of the ship with a light-shielding sheet during mooring, the growth of marine organisms adhering to the outer surface of the hull. An object of the present invention is to provide a device capable of sufficiently preventing the hull from being soiled and preventing the hull from being soiled.

[0005]

In order to achieve the above-mentioned object, the underwater vessel fouling prevention apparatus of the present invention allows marine organisms to attach and grow on the outer surface of the underwater vessel of a moored ship to grow and propagate. In order to prevent this, a light-shielding sheet that covers the outer surface of the hull below the water surface is attached to the outer surface of the hull. As a result, the outer surface of the hull below the surface of the water is covered with a light-shielding sheet, and the sheet blocks the sunlight to suppress the adherent growth and reproduction of marine organisms, so that the hull during mooring can be sufficiently prevented from being soiled. become.

Further, in the underwater hull pollution preventing device of the present invention, the upper edge of the light shielding sheet is detachably attached to the outer surface of the hull near the water surface, and the weight is attached to the lower edge of the light shielding sheet. It is characterized by being done. This allows
The light-shielding sheet can stably cover the outer surface of the hull in a state of hanging from the upper edge portion of the sheet mounted on the outer surface of the hull to the lower edge portion mounted with the weight.

Further, in the underwater hull antifouling apparatus of the present invention, the light shielding sheet is formed of a buoyant material so that the sheet and the weight attached to the lower edge of the sheet can float in an upright state. It is characterized by being configured. As a result, the light-shielding sheet can float with the upper edge of the sheet protruding above the water surface before being attached to the outer surface of the hull, so that the work of attaching the upper edge of the sheet to the outer surface of the hull Will be done easily.

Further, the underwater antifouling device of the present invention is characterized in that the means for removably mounting the light shielding sheet on the outer surface of the hull is composed of a magnet attracted to the outer plate of the steel hull. . As a result, the work of mounting the light-shielding sheet on the outer surface of the hull can be performed extremely easily by using the magnet, and the sheet can be easily removed.

Further, the underwater hull pollution preventing device of the present invention is characterized in that the means for removably mounting the above-mentioned light-shielding sheet on the outer surface of the hull is composed of a suction plate which is deformed by pressing to generate negative pressure. There is. As a result, the work of mounting the light shielding sheet on the outer surface of the hull can be performed very easily by using the suction cup, and the sheet can be easily removed.

Further, the underwater hull pollution preventing device of the present invention is characterized in that the antifouling agent is dissolved in the seawater between the light shielding sheet and the outer surface of the hull.
As a result, the antifouling agent is always kept in the seawater between the light-shielding sheet and the outer surface of the hull, so that the adhesion growth and propagation of marine organisms on the outer surface of the hull can be reliably prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of an underwater hull pollution preventing device as one embodiment of the present invention with reference to the drawings. FIG. 1 is a side view showing the outline of a hull equipped with the above device, and FIG. 2 is the ship of FIG. FIG. 3 is an enlarged side view showing an essential part of FIG. 1, and FIG. 4 is an enlarged sectional view showing an essential part of FIG.

As shown in FIGS. 1 to 4, a light-shielding sheet is provided to prevent marine life from adhering to and growing on the outer surface of the hull 1 below the water surface 2 of the hull 1, which is moored due to outfitting work. An upper edge portion of the sheet 3 is detachably attached to a steel hull outer plate surface slightly above the water surface 2 by a magnet 4, and a weight 5 is attached to a lower edge portion of the sheet 3, As a result, the lower part of the outer peripheral surface of the hull is covered with the light shielding sheet 3 in a skirt shape.

The light-shielding sheet 3 is made of a buoyant material such as a foamed resin material having closed cells, and together with the weight 5 attached to the lower edge of the sheet 3, the sheet 3 can float in an upright state. Is configured. That is, the same sheet 3
Even when the upper edge of the seat 3 is not attached to the outer surface of the hull by the magnet 4, the upper edge of the seat 3 can be floated in an upright state protruding above the water surface.

As means for detachably mounting the upper edge portion of the light shielding sheet 3 on the outer surface of the hull, instead of the magnet 4,
It is also possible to use a suction plate that is deformed by pressing to generate a negative pressure. In this case, the suction plate is attached to the upper edge portion of the light shielding sheet 3 on the side facing the outer surface of the hull. Also,
The antifouling agent is dissolved in the seawater between the light-shielding sheet 3 and the outer surface of the hull. The antifouling agent is contained in the bottom paint of the ship so that it can be dissolved in the seawater from the paint. However, the antifouling agent may be injected into the seawater between the light shielding sheet 3 and the outer surface of the hull, or the surface of the light shielding sheet 3 facing the outer surface of the hull may be coated with the antifouling agent. .

Since the underwater antifouling device of the present embodiment is constructed as described above, the light-shielding sheet 3 for covering the outer surface of the hull under the water of a moored ship blocks sunlight and the ocean to the outer surface of the hull. By suppressing the adherent growth and reproduction of organisms,
The hull is prevented from being damaged during the mooring period. Further, the light shielding sheet 3 can stably cover the outer surface of the hull in a state of hanging from the upper edge portion of the sheet 3 mounted on the outer surface of the hull to the lower edge portion mounted with the weight.

Further, the light-shielding sheet 3 can float with the upper edge of the sheet 3 protruding above the water surface before being mounted on the outer surface of the hull, so that the upper edge of the sheet is placed on the outer surface of the hull. The work of mounting is facilitated.
Then, the work of mounting the light shielding sheet 3 on the outer surface of the hull can be performed very easily by using the magnet 4, and the removal of the sheet 3 can be easily performed.

Further, the work of mounting the light-shielding sheet 3 on the outer surface of the hull can be performed very easily even when the suction plate is used instead of the magnet 4, and the sheet 3 can be easily removed. . Furthermore, since the antifouling agent is always kept in the seawater between the light-shielding sheet 3 and the outer surface of the hull, the adherent growth and reproduction of marine organisms on the outer surface of the hull can be surely prevented. Become.

As described above, in the underwater hull pollution control device of this embodiment, the outer peripheral surface of the hull below the water surface of the moored ship is covered with the light-shielding sheet 3 to suppress the growth of marine organisms. In the case of a new ship, the outer surface of the hull is not contaminated during mooring for its outfitting, so it is no longer necessary to dock, clean, polish and top coat the hull immediately before the test run. As a result, it is possible to shorten the period until the ship is completed and to reduce the construction cost.

[0019]

As described in detail above, according to the underwater hull pollution control device of the present invention, the following effects can be obtained. (1) A light-shielding sheet that covers the outer surface of the hull below the water surface of a moored ship blocks sunlight to prevent marine life from adhering to and growing on the outer surface of the hull, and prevents damage to the hull during the mooring period. Like (2) The light-shielding sheet can stably cover the outer surface of the hull in a state of hanging from the upper edge portion of the sheet mounted on the outer surface of the hull to the lower edge portion mounted with the weight. (3) Since the above light-shielding sheet can float with the upper edge of the sheet protruding above the water surface before it is attached to the outer surface of the hull, work to attach the upper edge of the sheet to the outer surface of the hull Will be done easily. (4) The work of mounting the light-shielding sheet on the outer surface of the hull can be performed very easily by using a magnet, and the sheet can be easily removed. (5) The work of mounting the light-shielding sheet on the outer surface of the hull can be performed extremely easily even when the suction plate is used instead of the magnet, and the sheet can be easily removed. (6) Since the antifouling agent is always kept in the seawater between the light-shielding sheet and the outer surface of the hull, it is possible to surely prevent the adhesion growth and reproduction of marine organisms on the outer surface of the hull. become. (7) The outer surface of the hull below the water surface of a moored ship is covered with a light-shielding sheet to prevent marine life from adhering and growing.In the case of a new ship, the outer surface of the hull is soiled during mooring for outfitting. Therefore, it is unnecessary to dock, wash, polish and top coat the hull just before the test run, which shortens the time to completion of the ship and reduces the construction cost. Is effective.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of a hull equipped with an underwater hull pollution preventing device as one embodiment of the present invention.

2 is a cross-sectional view of the ship of FIG.

FIG. 3 is a side view showing an enlarged main part of the ship shown in FIG.

FIG. 4 is a cross-sectional view showing an enlarged main part of the ship shown in FIG.

[Explanation of symbols]

 1 Hull 2 Water surface 3 Light-shielding sheet 4 Magnet 5 Weight

Claims (6)

[Claims] 1. A light-shielding sheet that covers the underwater outer surface of the hull is attached to the underwater outer surface of the hull in order to prevent marine life from adhering, growing, and multiplying on the underwater outer surface of the hull. The underwater hull pollution prevention device, which is characterized in that 2. The underwater hull pollution control device according to claim 1, wherein the upper edge of the light shielding sheet is detachably attached to the outer surface of the hull near the water surface, and the upper edge of the light shielding sheet is attached to the lower edge of the light shielding sheet. An underwater hull pollution prevention device characterized by having a weight attached. 3. The underwater hull pollution prevention device according to claim 2, wherein the light shielding sheet is formed of a buoyancy material, and the sheet floats in an upright state together with a weight attached to a lower edge portion of the sheet. Characterized by being configured to be able to
Underwater hull pollution prevention device. 4. The underwater hull pollution control device according to claim 2 or 3, wherein the means for detachably mounting the light-shielding sheet on the outer surface of the hull is composed of a magnet attracted to the outer hull plate made of steel. The underwater hull pollution prevention device, which is characterized in that 5. The underwater hull pollution control device according to claim 2 or 3, wherein the means for detachably mounting the light-shielding sheet on the outer surface of the hull comprises a suction plate that deforms by pressing to generate negative pressure. An underwater hull pollution prevention device characterized by the above. 6. The underwater hull pollution control device according to claim 1, wherein the antifouling agent is dissolved in seawater between the light shielding sheet and the outer surface of the hull. An underwater hull pollution prevention device characterized by the above.