JPH07304490A - Overturn preventing ship - Google Patents

Abstract

PURPOSE:To provide a passenger ship, a ferryboat. a fishing boat, and a lifeboat not overturned under severe natural conditions such as a storm or a typhoon due to rapidly changing weather in serious consideration of a safe and non- overturnable ship rather than a fast ship and to provide a small coaster and an oar boat (bowl boat) having a smaller immersion tank, a smaller block coefficient, and smaller resistance and hardly overturned. CONSTITUTION:An immersion tank external hull provided with a sea water entrance pressure transmitting open hole 3 and an air vent pipe 4 is added below the bottom of a flat-bottomed main hull 1 to form an immersion tank auxiliary hull 2. A connecting fixed keel 5 (deep keel) is provided between the bottom lower section of the main hull l and the interior of the immersion tank auxiliary hull 2, and this turnover preventing ship is constituted of the main hull 1 exerting the function of the ship based on the conventional ship theory and the immersion tank auxiliary hull 2 exterting the ship turnover preventing function containing a new concept.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capsize-preventing ship having a submersion tank having a hull structure reformed and modified as a capsize-preventing ship based on a conventional single-bottom ship, and in particular, a ferry boat, a fishing boat, a leisure fishing boat, a seto boat, The present invention relates to the mechanism principle of capsize prevention vessels, such as all-boats, lifeboats, and Owan boats, where safety is a more important issue than speed.

[0002]

2. Description of the Related Art Conventional small vessels are single-bottom vessels, large vessels (freight) are double-bottom vessels, and the inside of the double-bottom vessels are used as a ballast and fuel for the vessel and other multipurpose tanks to enhance the safety of the vessel. Large-scale double-bottom vessels and small-scale single-bottom vessels are also built on the basis of a design concept that considers the center of gravity and buoyancy of the vessel by the installation of loads such as power engines and the arrangement of loads, so large vessels can be used even in the stormy high waves. Although there is no shaking (tilt) that exceeds the restoring force, compared to large ships, small boats are affected by high and low waves such as high waves (triangular waves), and there are many accidents where the vessel overturns due to the tilting that exceeds the restoring force.

The fishing boats that are forced to operate in the offshore rough seas due to sudden changes in the weather are not constructed in consideration of the special capsize prevention function, and therefore operate in rough seas such as a capsized accident that cannot cope with changes in natural conditions. There was a fundamental flaw in the structure and function of the fishing boat itself that lacked safety.

[0004]

[Problems to be Solved by the Invention] A fishing boat operating offshore encounters a severe natural condition such as a storm due to a sudden change in weather, and as a cause of receiving a high wave and overturning, it is artificially caused by a collapse of a cargo or an inadequate operation of the boat. It has been pointed out that this is a negligence, but manipulating in the dark has a problem that human intelligence cannot solve.

[0005] In the situation where conventional ferry boats and fishing boats do not capsize in a situation that includes all the causes of capsizing due to high waves, to solve the problem of a capsize-preventing ship based on a conventional small ship Featuring the capsize prevention function of the captive prevention ship of the ship's inundation tank, it does not capsize even if it receives high waves offshore due to the capsize prevention function of the ship itself rather than the vessel maneuvering technology, conventional fishing boats, small boats and all-boats. Compared with, the safety of the fishing boat, small boats, all boats, etc., which is difficult to capsize due to the structure of the ship, is an important issue.

Further, a plurality of reinforcing columns are provided between the main hull 1 (keel or frame) and the inundation tank auxiliary hull 2 (keel or frame) to maintain the strength capable of supporting the weight of the hull on land and to bring the ship to land. Its advantage is that it does not require a power pump to move seawater in and out of the inundation tank when raising or returning the ship to the sea.

[0007]

DISCLOSURE OF THE INVENTION The present invention is directed to a main hull 1 which receives buoyancy by deforming the bottom of a ship having the same function as a conventional ship by flattening the bottom of the ship to shallow the waterline, and the bottom of the bottom of the main hull 1. Has one or more seawater inlet / outlet pressure transmission open holes 3 (or 3A) and one or more air vent vent pipes 4 (or one or more air inlet / outlet open holes 4A) capable of responding to changes in seawater pressure. Capsulation prevention submersion tank An external hull is added to form the submersion tank auxiliary hull 2 (or 2A), and a joint fixing keel (deep keel) 5 is provided between the lower bottom of the main hull 1 and the inside of the submersion tank auxiliary hull 2. The main hull 1 that performs the same function as the conventional ship,
It is a capsize prevention ship formed (configured) by a submersion tank auxiliary hull 2 that has a capsize prevention function of a ship that includes a new concept.

The shape of the holes 3 and 3A of the submersion tank is preferably a vertically long hole having a low resistance, and the size of the holes is made to be able to sufficiently cope with changes in the capacity and pressure of the submersion tank. A submerged tank divided into a plurality of sections requires a plurality of seawater inlet / outlet pressure transmission opening holes and a plurality of air vent holes. 3A is closed by a net, or when the water tank is full, it is closed by a stretchable membrane or an amplitude movable device and used as a pressure transmission hole to have the same function as the water tank. It is also possible to provide a pressure transmission amplitude (membrane) wall external hull at the bottom or side of the submersion tank to maintain the function of the submersion tank.

Inundation tank auxiliary hull 2 for solving the problems
(Or 2A) is characterized in that the seawater inside and out of the submersible tank is pressurized by the seawater inflow / outflow pressure release holes 3 and 3A due to the action of gravity, and the buoyancy is caused only by the main hull 1, whereas the center of gravity of the main hull 1 is At the same time as the ship sways due to the influence of the inundation tank, this center of gravity moves to the bottom as the apparent center of gravity of the sum of the seawater inside the inundation tank, so the apparent center of gravity is below the center of buoyancy (center of buoyancy). The ship at will encounter a harsh natural situation such as a typhoon or a storm as if the daruma laid down by the action of gravity stands up, and it will not capsize even if it receives a transverse wave that causes the ship to lie down due to poor maneuvering. In addition, even when such a ship is fully loaded, the metacenter is located on the center of gravity, which causes a restoring moment (restoring force) to prevent capsizing. Further, since the action of the moment of inertia about the metacenter acts strongly, it has the action of reducing the sway of the ship as compared with the conventional ship.

As described above, there is a characteristic that problems such as a ship that does not capsize due to the capacity of the submersion tanks of the submersion tank auxiliary vessels 2 and 2A can be reasonably solved as compared with a conventional ship that is hard to capsize.

[0011]

With respect to the capsize-preventing ship of the present invention, the main hull 1 in which the air vent vent pipe 4 of the inundation tank filled with seawater entering through the seawater entry / exit pressure transmission opening 3 is closed has the same shape and the inundation tanks of two fishing vessels. Comparing the case of small capacity and the case of large capacity, when both the fishing boat with a small inundation tank and the fishing boat with a large inundation tank are stationary, both the buoyancy and the center of gravity of both ships due to the main hull 1 Almost the same, but not much affected by the size of the inundation tank.

However, once the stationary state is changed to the motion state of swaying vertically and horizontally, the internal seawater of the inundation tank behaves like a solid with the same specific gravity as the seawater, and only the center of gravity adds the internal seawater of the inundation tank. As the apparent center of gravity of the sum moves to the bottom, the moment of inertia increases, and gravity and the apparent inertial force have a great influence on the prevention of shaking of the fishing boat.

The buoyancy and buoyancy are not affected by the size of the inundation tank, whereas only the center of gravity is affected by the size of the inundation tank and the apparent center of gravity moves to the lower part. Therefore, a fishing boat having a small inundation tank. Compared with, a fishing boat with a large inundation tank is more affected by gravity and inertial force, and the stability of the boat is increased.

Further, the conventional ship has a drawback that the rolling resistance of the ship is small and the ship easily rolls because the boundary surface of buoyancy received by the curved surface of the hull below the water surface is continuous. On the other hand, the buoyancy boundary surface of the capsize prevention ship is divided into the bottom of the main hull 1 (inside the inundation tank) and both sides below the water surface, and the buoyancy boundary surface of the main hull 1 is divided into two by the inundation tank. The rolling resistance of the ship is large, and the external force such as a sudden lateral wave is suppressed by the inertial force of the inundation tank, and the rolling motion of the ship becomes slower than that of the conventional ship.

If the seawater inlet / outlet pressure transmission opening 3 of the above-mentioned submersion tank is closed to interrupt the pressure transmission function, the apparent center of gravity changes to the center of gravity as it is, and the buoyancy center also moves downward. And the effect disappears, and it goes back to the conventional double bottom ship theory. In addition, if the flooding tank is unnecessarily enlarged, the square coefficient and the resistance are increased, and the practicality is lacking. Therefore, a flooding tank of a size suitable for the purpose and satisfying safety is required.

In order to satisfy the function of the capsize prevention ship and to make it faster, small ships and fishing ships are required to operate steel ships, aluminum ships and FR ships.
In the case of Ship P, the keel (keel) of the (inner hull) main hull 1 (external hull) is a double keel provided with a keel on the auxiliary tank 2 of the water tank, or the bottom of the main hull 1 is immersed. By providing a fixed keel (deep carcass) between the inside of the water tank auxiliary hull 2 and making the external ballast heavy, it is possible to make the water immersion tank smaller and reduce the square coefficient and resistance.

As described above, a new ship including a new concept in addition to the conventional ship theory for the effective use of the capsize prevention ship theory having the water immersion tank of the present invention and the optimum water immersion tank according to the purpose. A design concept is necessary.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment (1) and embodiment (2) are shown in FIG.
Will be described with reference to FIG. Example (1)

[Figure 1] and

FIG. 2 shows. The main hull 1 and a submersible tank auxiliary hull 2 having a seawater inlet / outlet pressure transmission opening 4 and an air vent vent pipe 3 at the bottom of the main hull 1 are provided between the bottom of the main hull 1 and the interior of the submersible tank auxiliary hull 2. Fixed keel bonded to the deep bone
5 is a capsizing prevention ship formed (configured) with a main hull 1 that performs the same function as a conventional ship and a submersion tank auxiliary hull 2 that functions to prevent capsizing of the ship. The air-sealed inundation tank that requires opening and closing of the air vent vent pipe 3 in and out of the seawater in the inundation tank,
Suitable for fishing boats and ferry boats that do not have to be constantly raised ashore and are moored at a port and operate offshore to operate in the open ocean.

Example (2)

[Figure 3]

FIG. 4 shows. A simple water tank auxiliary hull 2A having a main hull 1A and a seawater entry / exit pressure transmission opening 4A and an air vent opening 3A at the bottom of the bottom of the hull is constructed, and the main hull 1A that fulfills the function of the ship and the simple dipping that functions to prevent the capsizing of the ship Aquarium auxiliary hull 2
It is formed (configured) of A and is easy to handle without taking in and out of seawater. It is a capsize-preventing lifeboat or a capsize-preventing small fishing boat that raises the ship after use to the sea or returns it to the sea during use. Owan boats that are hard to capsize (all boats)
Suitable for etc.

[0020]

As described above, the seawater inlet / outlet pressure transmission opening 3 (or 3) of the capsize-preventing ship having the submersion tank of the present invention is provided.
A) and the feature of the submersible tank hull 2 (or 2A) having the air vent pipe 4 (or 4A) is that the internal seawater in the submersible tank transmits external water pressure through the seawater inflow / outflow pressure transmission opening 3 (or 3A). Due to the prevention of the movement of the buoyancy center to the lower part due to the main hull 1 (or 1A), the buoyancy center is not affected by the submersion tank auxiliary hull 2 (or 2A), while the main hull 1 ( Alternatively, the center of gravity caused by 1A) is affected by vertical and horizontal swaying (or swaying by waves when the ship is stopped) due to the forward motion of the ship, and only the center of gravity is affected by the movement of the ship. The stability of the ship increases because it moves to the bottom as the apparent center of gravity of the sum of the seawater inside the tank (increasing the ballast function of the bottom of the ship that receives buoyancy due to inertial force).

Further, due to the synergistic effects of the above-mentioned factors such as the rolling prevention city resistance due to the fact that the boundary surface of buoyancy is divided into two parts by the inundation tank, the capsize prevention ship of the present invention is designed so that a typhoon causes a typhoon to rise. Even if a ship falls sideways due to a transverse wave in rough seas, it has the effect of not overturning, and it has a more effective overturning prevention effect than conventional vessels (theory).

A modified capsizing prevention ship that has an external keel and an external hull at the bottom of the bottom of a fishing boat currently in use to form a double keel inundation tank auxiliary hull having a seawater inlet / outlet pressure transmission opening hole and an air vent vent pipe, While the square factor and resistance increase and the speed of the ship slows down, it becomes a highly safe capsize prevention ship.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a schematic ship of Example (1).

FIG. 2 is a sectional view of the central portion of the schematic ship of Example (1).

FIG. 3 is a cross-sectional view of a schematic ship of Example (2).

FIG. 4 is a sectional view of the central portion of the schematic ship of Example (2).

[Explanation of symbols]

 1 main hull 2 inundation tank auxiliary hull 3 seawater entry / exit pressure transmission open hole 4 air vent vent pipe 5 joint fixed keel (Deep Dragon bone) 1A main hull 2A simple inundation tank auxiliary hull 3A seawater entry / exit pressure transmission open hole 4A air release hole

Claims (5)

[Claims] 1. A main hull 1 in which a ship bottom portion is flatly deformed,
A submerged tank auxiliary hull 2 having at least one seawater inlet / outlet pressure transmission opening 3 and an air vent vent pipe 4 is formed in the lower bottom of the main hull 1, and the bottom lower part of the main hull 1 and the submersible tank auxiliary hull 2 are formed.
A capsulation prevention ship that is formed (configured) with a main hull 1 that functions as a ship and a submersion tank auxiliary hull 2 that functions to prevent capsizing of the ship by providing a joint fixed keel (deep carcass) 5 between the inside of the ship. 2. Similar to the above, the main hull 1A, and a simple inundation tank auxiliary hull 2A having one or more seawater entry / exit pressure transmission opening holes 3A and one or more air vent opening holes 4A at the bottom of the bottom of the hull.
A lifeboat, an Owan boat, or a small coastal ship, which is formed (configured) by a main hull 1A that functions as a ship and a simple inundation tank auxiliary hull 2A that prevents capsizing of the ship. 3. A plurality of submerged tanks each having one or more seawater inlet / outlet pressure transmission open holes 3 and one or more air vent vent pipes 4 or one or more air vent open holes 4A in one submerged tank ( The submersible tank hull 2 that was configured). 4. An inundation tank auxiliary hull 2 or a simple inundation tank auxiliary hull 2A in which seawater inflow / outflow pressure transmission opening holes 3 and 3A are covered with a net to prevent invasion of seafood into the inundation tank. 5. A submerged tank auxiliary hull 2 having a stretchable film for pressure transmission or an amplitude actuating part external hull at the bottom or side of the submersion tank, and when the water is full, the seawater inlet / outlet pressure transmission opening 3 is formed. To keep the pressure transmission function by closing the telescopic operation equipment (expansion membrane), and move the buoyancy center to the lower part (apparent buoyancy center)
Inundation tank auxiliary hull 2, which prevented