JPH1192315A - Prevention of fouling and beltlike unit for preventing fouling for ship or immersion structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fouling materials from sticking to the surface for preventing the fouling for a long period by a photocatalytic reaction of a TiO2 substance at the time of irradiation of natural light or artificial light by magnetically attracting a beltlike unit for preventing the fouling prepared by supporting the TiO2 substance onto the surface to the surface for preventing the fouling of a ship. SOLUTION: When a shell of a ship 1 is prepared from a ferromagnetic substance such as a steel material, a rolled beltlike unit 2 for preventing fouling obtained by supporting a TiO2 substance in an exposed state to the surface and preferably winding the TiO2 substance into the form of a roll is extended and magnetically attracted to the surface for preventing the fouling along, e.g. the waterline L of a surface 1a for preventing the fouling while rolling the beltlike unit 2 for preventing the fouling in an optional direction by utilizing a magnetic attracting force of a magnet or a magnetic beltlike unit. In the case of an immersion structure, the beltlike unit 2 for preventing the fouling is preferably helically wound around the surface of the immersion structure and attached thereto. Thereby, a photocatalytic reaction of the TiO2 substance can semipermanently be produced to sustain antifouling effects for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifouling method for a ship or a water-immersed structure and an antifouling strip, and more particularly to a photocatalytic reaction at a desired location to enhance the antifouling effect.

[0002]

2. Description of the Related Art As an antifouling method for ships, for example, a technique of applying an organotin-based paint to a hull to prevent marine organisms from attaching to the hull has been adopted.

[0003]

However, although heavy metals such as organotins are effective as antifouling agents, they are highly toxic to living organisms and have characteristics that are difficult to decompose spontaneously. It becomes a major factor of environmental pollution such as accumulation in sediment. Further, when the antifouling paint is peeled off, the labor for repainting the surface of a ship or the like becomes large.

[0004] The present invention has been made in view of the above circumstances, and achieves the following objects. To easily perform antifouling near the draft line of a berthed ship or marine structure. To maintain the antifouling effect for a long time. Improve antifouling workability and reduce labor. Easy removal of equipment used for antifouling work. Prevent marine environmental pollution. Provide flexibility to the size and shape of the antifouling object.

[0005]

An antifouling band in which a TiO ₂ body is exposed on a surface of a ship or a water-immersed structure made of a ferromagnetic material is exposed to a magnet or a magnet band. Using the magnetic force of the body to magnetize,
A technique is employed in which a photocatalytic reaction of the TiO ₂ body at the time of irradiation with natural light or artificial light prevents adhesion of a contaminant to a surface to be contaminated. The surface to be soiled is defined as a submerged surface on the hull or submerged structure or an exposed surface above the draft line. As a means for magnetically attaching the antifouling band to the surface to be antifouled, a roll-shaped antifouling band formed by winding the antifouling band into a roll is applied. A method of spreading and magnetizing while rolling in an arbitrary direction along the antifouling surface is adopted. In the case of a water immersion structure, a method of spirally winding and attaching an antifouling strip to the surface of the water immersion structure is adopted. In this case, an open spiral winding method other than densely winding the antifouling strip is also effective. For the antifouling strip, a technique in which a TiO ₂ body is disposed on both surfaces thereof and a technique in which conductivity is imparted are also adopted. A magnet strip having a magnetic force is magnetically attached at intervals in the width direction, and Ti is placed between the magnet strips.
O ₂ body a technique for supporting arranged antifouling net while being carried on the surface is also employed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of an antifouling technique according to the present invention will be described below with reference to FIGS.

In the figure, reference numeral 1 denotes a ship (hull), 2 denotes an antifouling band (roll-shaped antifouling band), and L denotes a waterline.

When the outer plate of the marine vessel (hull) 1 is made of a ferromagnetic material such as a steel material, the antifouling strip 2 uses the magnetic force of a magnet to form a desired antifouling surface 1a. Magnetically attached to the area.

In the example shown in FIG. 1, the antifouling strip 2 is rolled along a draft line L on the antifouling surface 1a using a rolled antifouling strip R obtained by winding the antifouling strip 2 in a roll. The method of spreading and magnetizing is adopted.

In the first example shown in FIG. 2, the antifouling band 2 is formed on the surface of a magnet band (magnet rubber) 2a having a magnetic adhesion to a ferromagnetic material such as steel, for example, n.
Forming a TiO ₂ film 2b of type TiO ₂ integrally;
The TiO ₂ body (TiO ₂ particles) 2c is exposed on the surface. In the second example shown in FIG. 3, the antifouling band 2 is made of Ti near the surface of the magnet band 2a.
O ₂ body 2c is mixed and supported as TiO ₂
At least a part of the body 2c is exposed on the surface.

As described above, according to the technique of magnetically attaching the antifouling band 2 to the antifouling surface 1a made of a ferromagnetic material, the antifouling surface 1a of the anchored ship (hull) 1 The magnet strip 2a can be easily magnetized, and can be irradiated with natural light such as sunlight or artificial light.
A photocatalytic reaction is generated in the portion of the iO ₂ body 2c, and based on the strong oxidizing power at that time, sterilization of microorganisms floating or swimming near the surface 1a to be soiled and the antifouling strip 2 is performed.
In addition to sterilization and propagation prevention, it is possible to prevent adhesion of fouling substances to the surface 1a to be soiled.

FIGS. 4 and 5 show a third example of the antifouling strip 2. In the third example, as shown in FIG. 4, a portion of the antifouling strip 2 is provided with a plurality of magnet strips 2a arranged at intervals in the width direction and a plurality of magnet strips 2a. An antifouling net 2d in which the TiO ₂ body 2c is supported integrally on the surface and which can be disassembled, and an antifouling surface 1 so as to hold down the antifouling net 2d as necessary.
a having a magnet 2e magnetically attached to a.

The antifouling surface 1a of the antifouling strip 2 of the third example.
In the case of covering an arbitrary portion, the antifouling band 2 having the antifouling net 2d is wound in a roll shape, then unrolled and unrolled, and the magnet band 2a is magnetically attached to the antifouling surface 1a. 5, or as shown in FIG. 5, the magnet strip 2a is attached to the individual magnets 2e.
A method of attaching while fixing by magnetic adhesion is adopted.

Further, the antifouling net 2 shown in FIGS.
In the case of d, since the TiO ₂ body 2c is supported so as to be exposed on the surface, the TiO ₂ body 2c
a, and the light passing through the mesh reaches the TiO ₂ body 2c near the antifouling surface 1a, and the photocatalytic reaction occurs in all layers of the antifouling strip 2. Is generated, a substantial anti-adhesion effect of aquatic organisms based on the oxidizing power and a cleaning effect by decomposing the attached organic matter can be expected, and the anti-fouling effect increases. In addition, since the oxidizing power based on the photocatalytic reaction reaches the space of the mesh of the antifouling net 2d, the size of the mesh is set in consideration of the intensity of the obtained irradiation light and the oxidizing power.

FIG. 6 shows a second embodiment of the present invention, in which an antifouling object is a water immersion structure 3 such as a port facility or an oil drilling facility. Stained surface 3a of water immersion structure 3
Is a cylindrical surface or a rectangular tube surface,
A technique is employed in which the antifouling strip 2 is spirally wound around and attached to the a. In this case, in addition to tightly winding the antifouling band, an open spiral winding method is also effective, and when the antifouling surface 1a is formed of a ferromagnetic material, a magnet is used. By applying the band 2a,
Winding workability can be improved.

[Other Embodiments] The present invention also includes the following techniques. a) A TiO ₂ body 2c is arranged on both sides of the antifouling strip 2 and is brought into contact with the antifouling surfaces 1a, 3a to thereby make the antifouling surfaces 1a, 3a.
The anti-fouling surfaces 1a, 3
Conduct corrosion protection of a. b) To impart conductivity to the antifouling strip 2 and generate an anticorrosive action by applying a potential. c) The antifouling surfaces 1a and 3a include a water-immersed surface and an air-exposed surface above the water line L. d) Applying or using ultraviolet irradiation by an ultraviolet lamp to promote the occurrence of a photocatalytic reaction. e) A technique for adjusting the shape of the magnet strip 2a in accordance with the size or shape of the antifouling surfaces 1a, 3a or the antifouling target, or cutting and pasting the magnet strip 2a to form the antifouling surfaces 1a, 3a. Cover the desired part. f) The antifouling strip 2 is peeled off and removed,
To reuse it.

[0017]

According to the antifouling method and antifouling strip of a ship or a water-immersed structure according to the present invention, the following effects can be obtained. (1) The antifouling band is magnetically attached to the antifouling surface made of a ferromagnetic material using magnetic force, and a photocatalytic reaction of the TiO ₂ body upon irradiation with natural light or artificial light causes the antifouling surface. Therefore, it is possible to easily perform antifouling near a draft line of a berthed ship or a marine structure. (2) by using the antifouling for strip which is supported on the exposed state of TiO ₂ body to the surface, can cause a photocatalytic reaction of TiO ₂ body semi-permanently, over the antifouling effect for long-term Can be sustained. (3) Since the magnetic force is applied by utilizing the magnetic force of the magnet or the magnet strip, the antifouling work can be easily performed, and the removal of the antifouling strip can be performed by peeling the strip. The working labor can be significantly reduced as compared with the case of applying a dirty paint. (4) Since the TiO ₂ body is carried on the surface of the antifouling strip, it does not contain pollutants, and the magnetically attached portion is peeled off and removed to prevent environmental pollution such as the ocean. can do. (5) The applicability of magnetically attaching the antifouling strip to the surface to be antifouled, and winding and attaching the antifouling surface as necessary, so that it is less affected by the size and shape of the antifouling object. In addition, flexibility in antifouling work can be improved. (6) By using the antifouling net in a state where the TiO ₂ body is supported on the surface, a wide range of the antifouling surface can be quickly and efficiently antifouled.

[Brief description of the drawings]

FIG. 1 is a front view showing a situation in which an antifouling technique according to the present invention is applied to a ship surface in a first embodiment.

FIG. 2 is a cross-sectional view showing a first example of an antifouling strip used in FIG.

FIG. 3 is a cross-sectional view showing a second example of the antifouling strip used in FIG.

FIG. 4 is a front view showing a third example of the antifouling strip used in FIG. 1;

FIG. 5 is a cross-sectional view showing a third example of the antifouling strip used in FIG. 1;

FIG. 6 is a front view showing a situation in which the antifouling technology according to the present invention is applied to the surface of a water-immersed structure in the second embodiment.

[Explanation of symbols]

1 ship (hull) 1a Hibokitana surface 2 antifouling strip 2a magnet strip (magnet rubber) R rolled antifouling strip 2b TiO ₂ film 2c TiO ₂ body (TiO ₂ particles) 2d antifouling net 2e Magnet L Draft line 3 Water immersion structure

Claims (9)

[Claims] 1. A stain for strip which was supported TiO ₂ body and (2c) on its surface (2), is magnetically attracted to the anti-staining surface (1a) of the hull (1) by magnetic attraction force, TiO ₂ body A method for preventing fouling from adhering to a surface to be contaminated by the photocatalytic reaction of the present invention. 2. A method according to claim 1, wherein the magnetic band is magnetically attached to the surface to be contaminated (1a). 3. The ship according to claim 1, wherein the roll-shaped antifouling strip (R) is rolled along the antifouling surface (1a) and magnetically wound while being rewound. Antifouling method. 4. An antifouling strip (2) is immersed in a water-immersed structure (3).
Of the TiO ₂ body (2c) spirally wound around the surface to be soiled (3a) and carried on the surface of the antifouling strip to prevent the adhesion of contaminants to the surface to be soiled. An antifouling method for a water-immersed structure, comprising: 5. An antifouling surface (1a, 3) made of a ferromagnetic material.
a) A magnet strip (2) for magnetically attaching to the surface of
a) and a TiO ₂ body (2c) disposed on the surface of the magnet band in a supported state to cause a photocatalytic reaction. 6. Both sides of the magnet strip (2a) are made of Ti.
Antifouling strip according to claim 5, wherein the O ₂ body (2c) is provided. 7. The antifouling strip according to claim 5, wherein the magnet strip (2a) has conductivity. 8. The magnetic tape according to claim 5, which is wound in a roll shape and magnetically wound while being rewound.
Or the antifouling strip according to 7. Between 9. plurality of magnets strip spaced in the width direction (2a), antifouling which arranged antifouling net state of being supported TiO ₂ body and (2c) on the surface (2d) Band.