JP2002205685A - Method of transporting fluid cargo by vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems in transporting fluid cargo by a bag body in marine transportation wherein the bag body of far larger size than a bag body used for land transportation is required but the enlargement of the bag body leads to the increase of pressure by the weight of an internal filled material and furthermore the increase of tension generated to a membrane material forming the bag body, which results in requiring the use of the membrane material of high strength, reinforcement, and the like to prevent the damage of the bag body, and with the increase of weight, a cargo filled in the bag body is integrally moved by the oscillation of a vessel in course of transportation and there is a possibility of the collapse of the cargo caused by the inertia force, by which the stability of navigation of the vessel is greatly affected, thereby requiring a means for stabilizing the cargo. SOLUTION: A bag body sized to come in close contact with all inner surface sides of a hold is formed of a water-oil impermeable membrane body, and the bag body is filled with the fluid cargo and placed in the hold. Or the bag body is filled with the fluid cargo and placed in the hold of the vessel, and supplementary water is filled in the hold.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transporting liquid cargo such as granules, powders and liquids by ship.

[0002]

2. Description of the Related Art Fluids, such as powders and liquids, which do not form a fixed shape but become indefinite, are transported on land by a dedicated vehicle such as a tank truck or by a general vehicle having a flat loading platform. For simple trucks, container bags are used. In addition, transport by ship is limited to transport in a state of being distributed in dedicated vessels such as tankers and fixed containers such as drums, due to the nature of the cargo.

[0003]

[0007] In marine transportation,
The application of bag-based transport may be possible, but requires much larger bags than those used for land transport.
However, when the size of the bag is increased, the pressure due to the weight of the cargo enclosed therein increases, and the tension generated in the membrane material forming the bag becomes extremely large, thereby preventing damage to the bag. It is necessary to use a high-strength film material or to reinforce it.

[0004] In addition, as the weight increases, the cargo enclosed in the bag body moves as a unit due to the movement of the ship during transportation, and the cargo may collapse due to its inertia.
That will greatly affect the navigation stability of the ship. In addition, when liquid is directly loaded on the hull by tanker, etc., the sway of the vessel causes the liquid to sway inherently. Especially when there is a free water surface, the impact pressure by the liquid acts on the inner wall and ceiling of the hull Safety measures are indispensable.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a bag having a size such that a fluid such as water or oil is tightly adhered to the inner surface of the hull by means of an impermeable membrane. The present invention relates to a method for transporting a liquid cargo in a ship, wherein the liquid cargo is enclosed in a vessel and placed on a hull. In addition, a fluid body such as water or oil forms a bag with an impermeable membrane, the fluid cargo is sealed in the bag, placed on the hull, and supplemented water is filled in the hull. A method of transporting a liquid cargo in a ship, characterized by injecting a liquid cargo.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional explanatory view in which a bag body in which fluid cargo is sealed is arranged in a tank of an oil tanker, FIG.
Is a vertical sectional view. In the figure, 1 is a hull and 2 is a hull.

Reference numeral 3 denotes a bag, which encapsulates a fluid cargo 4 such as granules, powders, or liquids, and transports it in a predetermined shape. The bag 3 has an entrance 5 for the fluid cargo 4 at a desired location, and the entrance 5 preferably has a valve-like or hatch-like structure having a water blocking property. Also,
The entrance 5 may be connected to an opening provided in the hull 2 and closed by a closing lid for the opening.

Although the shape of the bag 3 is substantially elliptical in the drawings, it may be spherical or oval depending on the shape of the hull 2 to be stored and the type and characteristics of the cargo to be enclosed. However, the size is such that when the cargo is sealed, the inner surface of the hull 2 is in close contact with all sides. The material forming the bag 3 is a film-like material such as rubber or synthetic resin that is impermeable to water or oil, and may or may not have elasticity, and its thickness is appropriately determined.

As shown in FIG. 3, the membrane is a composite in which one or more layers of a constraint body 6 made of a woven fabric, a nonwoven fabric, a net, or the like made of natural fibers, synthetic fibers, metal fibers, or the like are embedded in the membrane. By having a structure, a high-strength film-like body can be obtained. Numeral 7 is filling water, which is injected into the hull 2 together with the bag 3 in which the fluid cargo 4 is sealed. As shown in the figure, the bag 3 is preferably buried, and ideally, the hull 2 It is good that 2 is full. However, the entire bag 3 does not necessarily have to be buried depending on the size of the bag 3 and how the liquid cargo 4 is enclosed. The supplementary water may be any kind of water, seawater, other liquid or powder.

In the case where the filling water is put into the hull 2 and transported as described above, the size of the bag body 3 does not necessarily have to be a size that can closely adhere to the inner peripheral surface of the hull 2. 8 is an inner surface film. It is provided along the inner wall surface and bottom surface of the hull as necessary, and rubber that is impermeable to liquids such as water and oil,
It is a film-like material such as a synthetic resin, and may be the same as the film-like material of the bag 3. However, since no stress or tension is applied, the material and thickness are different from those of the bag-like material 3. Things are fine. The inner surface film 8 is detachable in the hull, and is attached by a locking means such as a rope or a locking fitting. This inner film 8
Is not necessarily required to be in close contact with the inner wall surface and the bottom surface, but may be provided between the bag body 3 and the inner wall surface and the bottom surface.

For example, when a liquid other than crude oil is transported by an oil tanker, the inner hull 8 is not necessary because the hull has a structure in which water-tightness is originally secured. This is to prevent the bag from being stained by oil adhering to the inner wall surface and the bottom surface of the hull, and to obviate the need for oil treatment at the time of discharging the make-up water 7.

According to the above configuration, as shown in FIG. 4, the bag 3 in which the fluid cargo 4 in the hull 2 is sealed is subjected to the buoyancy F by the supplementary water 7 so that the fluid cargo in the bag 3 is 4 and the difference in specific gravity of the make-up water 7 in the hull 2
Sinks or floats at the bottom of the hull 2, but in any case, the weight W of the fluid cargo 4 is reduced. Thereby, the deformation of the bag 3 can be reduced, and the tension T acting on the film material forming the bag 3 is reduced.

When the pressure P1 of the fluid cargo 4 is smaller than the liquid pressure P0 of the external refill water 7, the fluid cargo 4 is pressurized by the pressure difference, so that the transport cargo can be stabilized. it can. Further, when the hull 2 is filled with the supplementary water 7, deformation of the bag body enclosing the liquid cargo due to the movement of the ship during transportation is suppressed, so-called collapse of the load does not occur, and the ship is stable. And be able to sail.

In the above description, the filling water 7 is stored in the tank 2.
However, for example, it seems that the fluid cargo 4 is relatively small in specific gravity such as powder or the like, or the fluid cargo 4 is sufficiently filled in the bag body or sealed in a press-fit state regardless of the specific gravity. In such a case, it is not always necessary to inject the make-up water 7 into the hull 2, and in that case, only the bag 3 enclosing the fluid cargo 4 may be placed in the hull 2, Furthermore, if the bag is in close contact with the inner peripheral surface of the hull 2, it does not move significantly due to the gravity of the fluid cargo.

[0015]

According to the present invention described in detail above, a bag is formed by an impermeable membrane of a fluid such as water or oil, and the fluid cargo is sealed in the bag to ship the ship. By transporting the liquid cargo placed in the tank, there is an effect that the liquid cargo can be transported without causing collapse of the cargo due to the sway of the ship during transportation.

Further, by injecting make-up water together with the bag in which the liquid cargo is sealed in the hull, buoyancy is generated in the bag due to the difference in specific gravity between the two, and the deformation and movement of the liquid cargo due to the sway of the ship. This has the effect of being able to suppress further and to perform stable navigation. In addition, by the pressure of the refill water, it is possible to prevent the bag from spreading due to the weight of the fluid cargo and to reduce the deformation of the bag,
This has the effect of reducing the tension applied to the film material constituting the bag body and preventing damage such as cracks or breakage.

Further, if a film is provided between the bag in the hull and the inner wall surface and the bottom surface, dirt remaining in the hull is prevented from adhering to the bag and is poured into the hull. It has an effect as a waterproof material for preventing leakage of make-up water. In addition, when the filling water is not put in the hull, the fluid is sealed in the bag, so that the free water surface is regulated, and there is an effect that the impact force of the fluid does not occur on the wall surface or the ceiling surface.

[Brief description of the drawings]

FIG. 1 is a cross-sectional explanatory view in which a bag is arranged in a hull.

FIG. 2 is an explanatory view of the vertical section.

FIG. 3 is an explanatory view showing an example of a film-like body constituting a bag body.

FIG. 4 is an explanatory diagram of the action of make-up water.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Hull 3 Bag 4 Fluid cargo 5 Doorway 6 Restrictor 7 Filling water 8 Inner membrane

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshio Nishino 1058 Nakao, Uozumi-cho, Akashi City, Hyogo Prefecture Inside Shibata Industry Co., Ltd. Inventor Ichiro Ueda 2-21-11 Kamishirane, Asahi-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 3E070 AA10 AA12 AB01 AB02 AB03 BG10 BH10 DA11 DA14 DA15 DA18 GB09 VA30 WE10

Claims (4)

[Claims] 1. A bag having a size such that a fluid such as water or oil is tightly adhered to the inner surface of the hull by means of an impermeable membrane, and a fluid cargo is sealed in the bag. A method for transporting liquid cargo on a vessel, wherein the method is mounted on a tank. 2. A bag of a fluid such as water or oil is formed by an impermeable membrane, and the fluid cargo is sealed in the bag, placed on a hull, and placed in the hull. A method for transporting fluid cargo by ship, characterized in that make-up water is injected into the vessel. 3. A fluid cargo according to claim 2, wherein a liquid-impermeable membrane such as water or oil is interposed between the bag and the inner wall and bottom of the hull. Ship shipping method. 4. The woven fabric according to claim 1, 2 or 3, wherein the film is formed by impregnating a natural fiber, a chemical fiber, a metal fiber or the like into an impermeable film such as rubber or synthetic resin. A method for transporting liquid cargo by ship, comprising a composite material in which a restraining body such as a nonwoven fabric or a net is embedded.