JP3219790B2 - Shipborne oil spill diffusion prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to prevent a loaded crude oil or fuel oil from leaking out and spreading when a ship loaded with crude oil or fuel oil lands or a collision accident occurs, and to prevent the ship from spreading. The present invention relates to a ship-mounted type oil spill diffusion prevention device for shortening a stopping distance of a ship.

[0002]

2. Description of the Related Art Conventionally, a ship loaded with crude oil or fuel oil has no function of preventing the oil spilled therefrom from spilling or spreading when the ship collides or lands.
Once a spill occurs due to grounding or the like, the spill cannot be stopped until the oil in the ship is drained, and the oil that has spilled during that time is diffused widely by ocean currents. In the case of a large oil tanker, according to a simulation, the amount of oil spilled at the time of the accident will be spilled in the first few minutes (for example, in the case of a 100,000 ton oil tanker, the oil with a hole of 1 m in diameter at the bottom of the ship The outflow time is about 2 minutes.) Therefore, it would be good if it could be prevented from spreading at the initial outflow, but it could not. Therefore, when a spill occurs, an oil fence stored on the ground is carried to the site of the accident and spread around the spilled oil to prevent further diffusion of the oil. However, according to the above-mentioned oil fence, there is a problem that it takes a very long time to spread the oil fence after an accident occurs and oil starts to flow out, and the range of contamination becomes wide. There is a problem in that the oil is spread to a place at a certain distance from the ship, and is susceptible to the waves, making the work difficult. Further, when an accident such as a grounding or collision of a ship occurs, reducing the stopping distance is effective for oil diffusion, but there is no specific method at present.

[0003]

The problems to be solved are that the oil cannot be prevented from diffusing at the initial stage of oil spill, and that the stopping distance of the ship cannot be shortened.

[0004]

The present invention SUMMARY OF] is in the upper periphery of the ship, and in a state of fixing a top end of the split film like body into two or more circumferentially, and locking installed such lower falls, The height of the membrane is set to be lower than the bottom of the hull, and by releasing the locking state of the selected membrane in an emergency, the membrane can be moved to a required portion of the ship or the surrounding hull. surface
It is characterized by surrounding the area below the bottom of the ship and immediately surrounding the spill at the beginning of the oil spill.

[0005]

According to the above configuration, when oil spills due to grounding or collision , the lower end of the selected film is lowered to the surface of the water to be spread, so that the spill area is immediately surrounded by the film at the initial stage of the discharge. The spilled oil is stored between the hull surface and the membrane to prevent diffusion, and can be easily recovered from a small area even during recovery. In addition, since the membrane extends below the surface of the water, the seawater surrounded by the membrane increases the mass and increases the hull resistance. For this reason, it is possible to reduce the forward distance after stopping the engine.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. Plan view of a state in the first embodiment Figure 1 was stretched a membrane-like body, FIG. 2 is a sectional view,
FIG. 3 is a side view showing an embodiment in which the entire periphery of the hull can be covered with a membrane body divided into two, and the hull 1 has a bow 1a, a side 1b, and a stern 1c. Hull 1
The upper ends of the membranes 2a and 2b, which cover at least half of the area, are fixed to each other so that when the two membranes 2a and 2b are extended, both ends overlap each other so that the lower ends fall. The hull 1 is set to a height below the bottom of the hull 1. In addition, it is preferable that the respective ends of the membranes 2a and 2b do not have openings along the side surfaces of the hull 1. According to such a configuration, in an emergency such as a grounding or a collision, the locked state of the membrane 2a or 2b on the downstream hull from which the oil has flowed out is released, thereby lowering the lower end of the membrane 2a or 2b. It is possible to immediately surround the outflow point at the beginning of the oil spill by covering the hull surface on the outflow side of the hull 1 by spreading it on the water surface. By doing so, the outflowing oil does not accumulate and diffuse between the hull and the membrane 2a or 2b, and the accumulated oil can be easily recovered. When the oil recovery is completed, the membrane 2a or 2b is stored again on the ship. Further, the film-like member 2b or 2a around the opposite downstream side of the hull and to <br/> to Ru is stretched by splashdown, boat speed subjected to any hull resistance by film-like body is rapidly decelerated stop The distance can be shortened.

[0007] plan view of a state in the second embodiment Figure 4 was stretched a membrane-like body, FIG. 5 is a sectional view,
FIG. 6 is a side view showing an embodiment in which the entire periphery of the hull can be covered with three or more divided membranes, and the hull 1 has a bow 1a, a side 1b, and a stern 1c. ,
The hull 1 is divided into a plurality of sections, and the upper ends of the membranes 2a, 2b... 2n that cover the respective areas are fixed, and the respective membranes 2a, 2b. Sometimes, they are arranged so as to be continuous with each other, and are locked and installed so that the lower end falls, and these film-like bodies 2a, 2b.
The height of n is set to a height below the bottom of the hull 1. It should be noted that the respective ends of each of the membranes 2a, 2b,... 2n should not be opened along the side surface of the hull 1. According to such a configuration, in the event of an emergency such as a grounding or collision, the locked state of the membrane on the hull where the oil spilled is released, so that the lower end of the membrane is dropped on the water surface and expanded. The spill portion is immediately surrounded at the beginning of the oil spill so as to cover the hull surface on the outflow side of the hull 1. By doing so, the outflowing oil does not accumulate and diffuse between the hull and its membrane, and the accumulated oil can be easily recovered. When the oil has been collected, the film is stored again on the ship. In addition, because the membrane surrounding the hull lands and spreads, the hull resistance due to the membrane is added, and the ship's speed is rapidly reduced and the stopping distance can be shortened. Diffusion can be prevented, and the hull resistance by one layer can be added by expanding the film-like body at other places as needed.

[0008] Third Embodiment FIG. 7 is a plan view of a state in which stretched the film-shaped body, FIG. 8 is a sectional view,
FIG. 9 is a side view showing an embodiment in which the side surface of a portion of the hull where an oil tank is located can be covered with a film.
On a ship at one place on the ship side 1b of the hull 1, a film-like body 2 covering the side surface thereof is fixedly mounted so that the upper end is fixed and the lower end is dropped, and the height of the film-like body 2 is set to the hull. The height is set below the bottom of the ship. The film 2
It is preferable that openings are not formed at both end portions along the side surface of the hull 1. According to such a configuration, in an emergency such as a grounding or a collision, the locked state of the membrane 2 on the hull of the tank where the oil has flowed out is released, so that the lower end of the membrane is dropped on the water surface. The spilled portion is extended so as to cover the hull surface on the outflow side of the hull 1 and immediately surround the outflow point at the beginning of the oil spill. By doing so, the outflowing oil does not accumulate and diffuse between the hull and its membrane, and the accumulated oil can be easily recovered. When the oil has been collected, the film is stored again on the ship. In addition, since the film-like body lands around the hull and spreads, the hull resistance due to the membrane is added, and the ship's speed can be rapidly reduced to shorten the stopping distance, which also reduces the oil diffusion. That can be prevented. Although each of the embodiments has been described above, the arrangement of the membrane is not limited to the above embodiment, and may be any other arrangement. It may be made of a synthetic fiber woven fabric or nonwoven fabric in a curtain shape, or may be made of a synthetic resin plate, a metal plate, or the like, or a shutter shape. Furthermore, a weight may be attached to the lower end of the film-like body as needed.

[0009]

According to the present invention described [Effect Invention above in detail, the upper periphery of the ship, and in a state of fixing a top end of the split film like body into two or more circumferentially, locking installed such lower falls The height of the film is set to be lower than the bottom of the ship, and by releasing the locked state of the selected film in an emergency, the film can be moved to a necessary place or around the ship.
The area surrounding the hull surface and the bottom of the vessel is surrounded immediately below the oil spill at the initial stage of oil spill, and marine pollution due to oil spill accidents can be minimized. In addition, by expanding the membrane, an additional mass is added, so that the boat speed can be rapidly lowered, and this also prevents the spilled oil from diffusing. Furthermore, since the membrane is integral with the hull, the effect of reliably storing oil spill between the hull and the membrane without being affected by natural conditions such as tidal currents, winds, and waves. And recovery by pump-up is extremely easy. Also,
INDUSTRIAL APPLICABILITY The present invention can be used as emergency braking for avoiding collisions with other ships, collisions with piers and marine structures, etc. other than measures against oil spills. Of course, it can also be used as an oil fence for berthing ships. Furthermore, in the case of a berthed ship, it is possible to restrain the movement of waves at the bottom by expanding the film-like body, so that it is possible to reduce the sway and to achieve the effect of enabling smooth cargo handling activities. Have.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a film-like body according to a first embodiment of the present invention is extended.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a plan view of a film-like body according to a second embodiment of the present invention in an extended state.

FIG. 5 is a rear view of the same.

FIG. 6 is a side view of the same.

FIG. 7 is a plan view showing a third embodiment of the present invention in a state where a film is stretched.

FIG. 8 is a rear view of the same.

FIG. 9 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 1a Bow 1b Ship side 1c Stern 2a, 2b, 2c Membrane body

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Asagi 2-4-2, 4-2-4 Shimizugaoka, Tarumizu-ku, Kobe (72) Inventor Nobuyasu Ikoma 1058 Nakao, Uozumi-cho, Akashi-shi, Hyogo Pref. (72) Inventor Mitsuyoshi Shibata 1058 Nakao, Uozumi-cho, Akashi-shi, Hyogo Prefecture Inside Shibata Industry Co., Ltd. (56) References JP-A-48-86278 (JP, A) JP-A-52-35084 (JP, A) Japanese Utility Model Showa 49-12689 (JP, U) Japanese Utility Model Showa 52-17483 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B63B 25/08 B63B 35/32

Claims (4)

(57) [Claims] 1. At least two in the circumferential direction around the upper part of a ship
The membrane was divided into two parts, and the upper end was fixed, and the lower end was locked and installed so that it could fall.The height of this membrane was set below the bottom of the ship, and was selected in an emergency . Film
By releasing the locked state of the body, the film-like body of the ship 必
Surrounds the key points or surrounding hull surface and below the ship bottom
Ship mounting type oil spill diffusion preventing device you characterized by. 2. The method according to claim 1, wherein the film is expanded.
The two membranes should be placed so that both ends overlap.
A spilled oil diffusion prevention device mounted on a ship. 3. A film-like body having a top end on a desired portion of a ship
In a fixed state, lock and install so that the lower end falls,
Set the height of this membrane to a level below the bottom of the ship
Yes, in the event of an emergency, releasing the locked state
Characterized to surround the side and below the bottom of the ship
Oil spill diffusion prevention device. 4. The film according to claim 1 or 3,
When the bodies are extended, both ends of each membrane are
Oil spill expansion on board, characterized by running along the side
Splash prevention device.