JPH1192316A - Prevention of fouling for ship and net for preventing fouling for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fouling and corrosion of the whole ship at the time of anchoring by horizontally extending a TiO2 net, sinking the extended TiO2 net in an expected anchorage area for the ship, guiding the ship onto the TiO2 net, pulling up the TiO2 net after the guiding, fixing the pulled up TiO2 net in a state thereof wrapping the periphery of the hull and causing the photocatalytic reaction in the TiO2 net. SOLUTION: A ship 1, e.g. a very large crude carrier is guided to a net 2 for preventing fouling (comprising a TiO2 net 21, sinkers 22 or the like), previously sinked in an expected anchoring area such as a dock and processed to expose the TiO2 to the surface and the TiO2 net 21 is pulled up with a crane 3 to wrap the hull with the TiO2 net 21. The edge of the TiO2 net 21 is then drawn near up to the hull, hauled up and fixed to both gunwales. The net 2 for preventing the fouling is stretched around the whole surface of ship sides and a ship bottom including the waterline L. Thereby, a photocatalytic reaction of the TiO2 net is caused to prevent the fouling and corrosion of the ship 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifouling method and apparatus for a ship, and more particularly to an improvement in the antifouling effect of a hull utilizing a photocatalytic reaction.

[0002]

2. Description of the Related Art As an antifouling method for ships, for example, a technique has been adopted in which a hull paint containing organotin is applied to the hull to prevent marine organisms from attaching to the hull.

[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. For this reason, concentration in the body into other beneficial organisms such as sediment organisms progresses, and it cannot be said that it is suitable as an antifouling agent in view of the effect of insecticidal components on living organisms. Ships range from large vessels such as tankers to small vessels such as sports and leisure vessels.
In any case, antifouling treatment is required. For this reason, in the antifouling treatment, it is desirable that work such as installation and removal of working equipment, or pulling in and detaching of the hull can be easily performed regardless of the size and shape of the hull. In addition, since workers are exposed to the antifouling agent atmosphere for a long period of time, safety for the human body must be considered.

[0004] The present invention has been made in view of such problems, and has the following objects. Antifouling and anticorrosion of the entire hull at the time of anchorage. Be flexible in the size and shape of the hull. To facilitate the installation and removal of work equipment. To make the hull easy to pull in and out. Prevent marine environmental pollution.

[0005]

[MEANS FOR SOLVING THE PROBLEMS] T
iO_TwoUnder the sea or under the sea using a weight
Spread horizontally and sink, TiO_TwoInvite a ship on the net
Lead and after induction TiO _TwoPull the net around the hull
Wrapped in TiO_TwoShips that generate photocatalytic reactions on the net
The technology of antifouling is adopted. The first to wrap around the hull
As a means of guiding the ship to the waterway between the left and right quays,
TiO by crane arranged on the right_TwoHang the net
Technology to wrap around the hull
You. As a second means to wrap around the hull, float
TiO_TwoHang the net underwater, and ship there
Guidance, and after the guidance, pull up the net further around the hull.
The technology that wraps around is adopted. Around the hull
As the third technology for wrapping, TiO_TwoOne side of the net on the quay
While hanging the other one on a float
To guide the ship there and wrap around the hull
Technology is adopted. TiO mentioned above_TwoOn the net
In the case where any of the first to third techniques is adopted,
From a crane or float
In place of the inch, fixed in a suspended state on both sides of the ship
It is desirable. TiO wrapped around the hull_TwoNet
The ship is forced to irradiate ultraviolet light.
Enhance the photocatalytic effect near the body, TiO_TwoEnhances the oxidizing power of
TiO_TwoFloat or swim near the net
Sterilization, sterilization, propagation prevention and corrosion protection of hulls
To do. In addition, TiO_TwoOn the net,
Photocatalytic properties of the striatum for forming stitches
TiO_TwoIs carried, such as fibrous
Processed into TiO_TwoBy bringing together the fiber assembly
Or a striated body thickened to a desired diameter_TwoKnead fine powder
TiO manufactured by embedding_TwoStriations composed of fiber aggregates
TiO on body or wire surface_TwoShape coating layer
A formed striatum is employed. In each case, Ti
O_TwoIt is necessary to make it so that
You. TiO_TwoAs the light source for the net, sunlight is mainly used.
Used, but natural conditions (unseasonable weather) or ship anchorage
UV irradiation lamp so that it is not affected by the installation conditions of the area.
Installed in the sea or near the draft line,
To produce a stable photocatalytic reaction
Is also good.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a ship antifouling method and its antifouling net according to the present invention will be described below with reference to FIGS.

In the drawing, reference numeral 1 denotes a ship, 2 denotes an antifouling net,
3 is a crane, 4 is a float, X is a quay, L is a draft line,
S is a waterway.

The ship 1 is, for example, a large tanker, and is guided on an antifouling net which has been previously sunk in a berth site such as a dog as shown by an arrow in FIG.

The antifouling net 2 is, for example, a fishing net.
TiO2 on flexible net _TwoWhen carrying
First, TiO_TwoProcessed so that is exposed on the surface
As shown in Fig. 1, the water
TiO installed in a flat state_TwoNet 21 and T
iO_TwoThe TiO is arranged at an arbitrary position of the net 21 and_TwoNet
A weight 22 for sinking 21 into the sea or the sea floor,
TiO_TwoThe TiO is disposed on the periphery of the net 21 and_TwoNet
A wire 23 for lifting 21 and above the wire 23
And the hung tool 24 disposed at the end.

[0010] As shown in FIG. 2, the crane 3 is arranged in pairs or plural pairs so as to form a pair with both shore walls (X) forming a water channel S, and has hooks 32 suspended by wires 31. The TiO ₂ net 21 is hung by hooking the held holder 24 of the antifouling net 2.

Specifically, before the ship 1 is guided, a crane
3. The antifouling net 2 is hung down by_TwoNet
Submerge part 21 and place water in the sea or seafloor in the berth area
Spread it flat. TiO_TwoAfter the installation of the net 21, the ship
Inducing TiO 1_TwoAnchored just above the net 21
You. After the ship 1 is guided, the crane 3_TwoNet
21 is raised, and as shown in FIG._TwoNet 2
1. While keeping the hull in a wrapped state, _TwoNe
The edge of the unit 21 is drawn toward the hull, and a plurality of
The held tool 24 is lifted by the inch 11 and Ti
O_TwoThe net 21 is fixed. By doing this,
As shown in FIG. 3, the antifouling net 2 is a ship including the draft line L.
It is spread all over the belly and the bottom of the ship.

In this case, the antifouling net 2 is arranged close to the surface of the hull, and can generate a photocatalytic reaction in the TiO ₂ net 21 by irradiating sunlight or ultraviolet rays. That is, a photocatalytic reaction is caused in the TiO ₂ net 21 by the irradiation of sunlight or ultraviolet rays from an ultraviolet lamp disposed in the water channel S, thereby disinfecting microorganisms floating or swimming near the hull based on strong oxidizing power.
Sterilization and propagation prevention can be performed. At the same time, an anticorrosion effect on the hull can be expected due to a decrease in the corrosion potential on the hull surface due to the occurrence of the photocatalytic reaction.

Next, a second embodiment of a ship antifouling method and its antifouling net will be described with reference to FIG.

In the second embodiment, as shown in FIG. 4, the antifouling net 2 is suspended underwater by using a crane 3 and a float 4 on the quay X. In this case, T
one of iO ₂ net 21 together keep suspended by crane 3 quay X, suspended by a float 4 which floated the other TiO ₂ nets 21 to the water surface of the mooring plan area hanged, berthing will antifouling net 2 Installed in the sea or on the seabed in the area. After the ship 1 is guided, the crane 3 on the quay X and the winch 11 on the ship are actuated, and the TiO ₂ net 21 is pulled up by, for example, the hull by the hung object 24 and the wire 23, and the above-described first method is performed. It is fixed to both sides as in the embodiment. Thus, the installation of the antifouling net 2 is completed.

A third embodiment of a ship antifouling method and its antifouling net will be described with reference to FIG.

In the third embodiment, as shown in FIG. 5, for example, a plurality of floats 4 are arranged in pairs on the left and right sides to suspend the antifouling net 2, and the submarine or the seabed is used. It is to be installed in. After the ship 1 is guided, the TiO ₂ net 21 is brought close to the hull by the winch 11 on the ship and pulled up to fix the antifouling net 2.

FIGS. 6 to 8 show structural examples of the striated body (F1, F2, F3) for forming the stitches of the TiO ₂ net 21. FIG. In the first example of FIG. 6, two TiO ₂ fiber aggregates F11 are twisted into a rope shape, and the TiO ₂ fiber aggregates 11 are made of a fiber strand a made of plastic or the like and a TiO ₂ strand. and b are grouped together. The second example of FIG. 7 shows two TiO ₂ fiber aggregates F
21 is twisted into a rope shape and the TiO
_{The two-} fiber aggregate F21 is a state in which TiO ₂ fine powder P is kneaded into the fiber strand a so that TiO ₂ is also supported on the surface of the fiber strand a. In the third example shown in FIG. 8, a TiO ₂ coating layer 32 is formed on the surface of a thread-like or wire-like wire F31 such as nylon or aluminum wire. In any case, the striatum F1, F2, F
3 of the surface, using what TiO ₂ was shown supported so that the exposed state, TiO ₂ net 21 mesh are produced.

[0018]

According to the antifouling method for a ship and the antifouling net according to the present invention, the following effects can be obtained. (1) The entire hull is wrapped using an antifouling net carrying TiO ₂ in an exposed state, and a photocatalytic reaction is caused to impart a strong oxidizing power to the vicinity of the hull, thereby preventing the entire hull from being stained and corroded. It can be carried out. (2) By using a flexible antifouling net, flexibility in the size and shape of the hull can be provided. (3) The handleability based on the flexibility of the antifouling net,
The simple installation and removal of the antifouling work equipment can be easily performed by simple lifting using a crane, float, winch, or the like. (4) upon attachment to the hull of the antifouling nets, induce vessels to expand the TiO ₂ net horizontally, by raising the TiO ₂ net surrounding the surface of the hull, to combined hull and simple structure The hull can be easily attached and detached, and the hull can be easily pulled in and out. (5) A photocatalytic reaction is caused in TiO _2, and the anti-fouling effect is improved by disinfecting, sterilizing, and preventing the propagation of microorganisms floating or swimming near the hull by strong oxidizing power. Use of an antifouling agent containing a harmful substance is not required, and marine pollution can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a ship antifouling method and its antifouling net according to the present invention.

FIG. 2 is a side view showing a first embodiment of the ship antifouling method and the antifouling net according to the present invention.

FIG. 3 is a front view showing the first embodiment of the ship antifouling method and the antifouling net according to the present invention.

FIG. 4 is a side sectional view showing a second embodiment of an antifouling net.

FIG. 5 is a side sectional view showing a third embodiment of an antifouling net.

FIG. 6 is a diagram illustrating a first example of a striatum constituting a mesh of the antifouling net.
It is a cross section showing an example.

FIG. 7 shows a second example of a striatum constituting a mesh of the antifouling net.
It is a cross section showing an example.

FIG. 8 shows a third example of a striatum constituting a mesh of the antifouling net.
It is a cross section showing an example.

[Explanation of symbols]

1 Vessel 2 antifouling net 3 crane 4 float 11 winch 21 TiO ₂ nets 22 weight 23 wire 24 where the suspended jig 31 wire 32 hook F1 striatal a cellulose line b TiO ₂ strands F2 striatum F21 TiO ₂ fiber assembly P TiO ₂ powder F3 striatum F31 wire F32 TiO ₂ coating layer X quay L water line S waterways

Claims (11)

[Claims] 1. A a process to be submerged to expand the TiO ₂ net (21) horizontally moored plan area of the vessel (1), TiO ₂
Guiding the hull on the net and TiO after guiding the ship
_{(2) a} step of raising the net, a step of fixing the raised TiO ₂ net in a state of being wrapped around the hull,
generating a photocatalytic reaction in the iO ₂ net. 2. A step of guiding a ship (1) to a water channel (S) between left and right quays (X) and a step of suspending a TiO ₂ net (21) by a quay crane (3). The method of claim 1, wherein: 3. The method according to claim 1, further comprising a step of suspending the TiO ₂ net (21) in the water by the float (4) and a step of further pulling up the TiO ₂ net after guiding the vessel (1). Item 3. An antifouling method for a ship according to item 1 or 2. 4. A step of suspending one of the TiO ₂ nets (21) on the quay (X) and a step of suspending the other of the TiO ₂ nets on the float (4). The method of claim 1, wherein 5. The TiO ₂ net (21) raised is
5. The method according to claim 1, wherein the ship is fixed on both sides of the ship. 6. The ship according to claim 1, wherein the TiO ₂ net (21) is irradiated with ultraviolet rays to sterilize, sterilize, and prevent propagation of microorganisms floating or swimming near the TiO ₂ net. Antifouling method. 7. A TiO ₂ net (21) which is horizontally spread and submerged in a berth area of a ship (1), and a float (3) which is connected to the TiO ₂ net and suspends it near the sea surface.
An antifouling net comprising: 8. and TiO ₂ net (21), said TiO ₂
Weight (22) sinking the net into the sea or under the sea,
iO ₂ antifouling net, characterized in that arranged at the edge of the net hanging the TiO ₂ net Jisuru comprising a where the suspended jig (24). 9. The TiO ₂ net (21) is formed by a filament (F1) produced by twisting TiO ₂ fiber aggregates (F11).
Or the antifouling net according to 8. 10. striatum (F2) is, TiO ₂ fiber aggregate made by kneading a TiO ₂ powder (P) (F
The antifouling net according to claim 7 or 8, wherein the antifouling net is formed by (21). 11. The antifouling device according to claim 7, wherein the striated body (F3) is formed by forming a TiO ₂ coating layer (F22) on the surface of the strand (F21). For net.