JP2010132111A - Hull tank structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To load different liquids in the same tank of a hull, and to attain corrosion resistance of the tank. <P>SOLUTION: A hull tank structure is provided with a bag body 10 capable of storing liquid is disposed in the wing tank 5 of the hull 1, and a bag body feeding/discharging device 13 for injecting-discharging liquid into/from at least the inside of the bag body 10. It is preferable the structure also includes a tank feeding/discharging device for injecting-discharging liquid into/from the outside of the bag body 10 in the wing tank 5. It is preferable that the bag body feeding/discharging device 13 is a corrosive liquid feeding/discharging device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hull tank structure in which different types of liquids can be loaded in the same tank of a hull, and the corrosion resistance of the tank can be improved.

  Conventionally, a ship is provided with a tank for loading various liquids. There are various types of liquids to be loaded, such as ballast water (seawater) to maintain the hull attitude, fuel oil, liquid cargo (crude oil for crude oil tankers, chemicals for chemical tankers, and petroleum products for product tankers). is there.

  FIG. 4 is a cut front view showing an example of a hold of a crude oil tanker. The hull 1 has a double bottom structure composed of an inner bottom plate 2 and an outer bottom plate 3. A center tank 4 for loading oil and a wing tank 5 are provided, and left and right ballast tanks 7 defined by a central partition wall 6 are formed inside the double bottom structure. The ballast tank 7 in the double bottom structure ship is provided with sufficient corrosion resistance by coating 8 or the like in order to cope with pouring and discharging corrosive ballast water (seawater).

  In ships that transport liquids as described above, from the viewpoint of preventing marine pollution, different types of liquid as described above cannot be loaded in the same tank. It is necessary to provide various tanks. Therefore, the volume of the ballast tank that is empty when the cargo is full, the fuel tank that is empty when the fuel is consumed, and the like are wasted.

  As a result, there are problems such as an increase in the required value of the longitudinal bending strength of the hull due to changes in loading at the time of departure / arrival at the port and a decrease in cargo due to a decrease in restoring force. 3 has to be increased, and the hull 1 is increased in size and the manufacturing cost is increased.

  Also, the liquid to be loaded is usually corrosive, especially in tanks loaded with ballast water, chemicals, petroleum products, etc., apply sufficient coating to the steel plate surface inside the tank, or make the tank itself a material with corrosion resistance. Therefore, there is a problem that the cost for the anticorrosion becomes enormous.

In addition, there exists the following patent document 1 as prior art information which technically disclosed about the anti-corrosion method of the ballast tank.
Japanese Patent Laid-Open No. 07-034271

  However, as described above, not only ships that load different types of liquid, but also ships that exclusively load one type of liquid cargo need tanks for fuel oil and ballast water in addition to the liquid cargo. For this reason, there is a problem that the cargo volume of the ship is reduced, and the steel plate surface on the inner surface of the tank needs to be sufficiently coated, resulting in a significant increase in cost. The development of technology that can be solved was desired.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hull tank structure in which different types of liquid can be loaded in the same tank of the hull, and the corrosion resistance of the tank can be improved. .

  The present invention is characterized in that a hull is provided with a bag body capable of storing liquid in a tank of the hull, and provided with a bag body supply / discharge device for injecting and discharging liquid at least in the bag body. This relates to the tank structure.

  In the above-mentioned hull tank structure, it is preferable that a tank supply / discharge device for injecting / discharging liquid to / from the bag body inside the tank is provided.

  In the hull tank structure, it is preferable that the bag supply / discharge device is a corrosive liquid supply / discharge device.

  In the hull tank structure, the tank is preferably a wing tank.

  In the hull tank structure, the tank is preferably a fuel oil tank.

  According to the hull tank structure of the present invention, since the bag body capable of storing the liquid is disposed in the tank, for example, when the bag body is installed in the wing tank, the liquid cargo becomes empty. The wing tank can act as a ballast tank by injecting ballast water into the bag body, and when the bag body is installed in the fuel tank, the attitude and strength of the hull are maintained as the fuel in the fuel tank is consumed. Because the ballast water that needs to be loaded can be injected into the same fuel tank across the thin film of the bag, no extra ballast tank equipment is required, and the hull is made smaller and lighter. There is an effect that can be realized.

  In addition, by injecting liquid that has corrosive properties to the inner wall surface of the tank into the bag body, the material specifications and coating specifications on the inner surface of the tank can be simplified and the costs related to materials and painting can be greatly reduced. There is.

  Furthermore, since different types of liquids can be loaded in the same tank across the bag body, there is an effect that the use efficiency of the tank can be improved.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 and 2 show an example of an embodiment for carrying out the present invention, and the same components as those in FIG.

  In FIGS. 1 and 2, a bag body 10 capable of containing a liquid is disposed in a wing tank 5 on which cargo oil provided in the hull 1 is loaded, and further, as shown in FIG. A bag supply / discharge device 13 including a pipe 11 and a pump 12 for supplying and discharging liquid is provided. The pipe 11 is connected to the bottom of the bag body 10. The bag supply / discharge device 13 that supplies / discharges liquid to / from the bag 10 is a corrosive liquid supply / discharge device 13a for supplying / discharging corrosive liquid such as ballast water, chemicals, or petroleum products. It is preferable that

  Further, the wing tank 5 may be a fuel tank 5a on which fuel is loaded.

  The material of the bag body 10 is not particularly limited as long as it has flexibility, airtightness, required strength, and does not change in quality due to the liquid to be loaded. For example, rubber or other polymer material or polymer A composite structure of material and fiber can be used.

  Further, as shown in FIG. 1, a tank supply / discharge device 16 including a pipe 14 and a pump 15 for supplying and discharging liquid to and from the outside of the bag body 10 disposed in the wing tank 5 is provided. Yes. The tank supply / discharge device 16 is also provided in the center tank 4 and the like as in the prior art.

  The bag body 10 may be provided in the center tank 4 in addition to being disposed in the wing tank 5.

  Next, the operation of the illustrated example will be described.

  As shown in FIGS. 1 and 2, the bag body 10 disposed in the wing tank 5 is contracted and positioned on the inner bottom plate 2 as shown by a solid line when no liquid is injected.

  From this state, when the liquid is supplied by the bag body supply / discharge device 13 and injected into the bag body 10, the bag body 10 gradually expands and fills the tank 5 as indicated by the broken line.

  Therefore, for example, when the liquid cargo in the wing tank 5 is emptied, the wing tank 5 can act as a ballast tank by injecting ballast water into the bag body 10.

  When the wing tank 5 is a fuel tank 5a, ballast water that needs to be loaded to maintain the attitude and strength of the hull 1 as the fuel in the fuel tank 5a is consumed is injected into the bag body 10. As a result, fuel and ballast water can be simultaneously loaded in the same fuel tank 5a across the thin film of the bag body 10, so that an extra ballast tank facility is not required. Therefore, it is possible to simplify the coating for maintaining sufficient corrosion resistance on the inner bottom plate 2 and the outer bottom plate 3 forming the double bottom structure, and to significantly reduce the costs related to the material and coating.

  In this way, since the ballast tank facility is not required, the distance between the inner bottom plate 2 and the outer bottom plate 3 of the double bottom structure of the hull can be reduced, so that the hull 1 can be miniaturized and the hull 1 can be reduced in weight. The manufacturing cost can be reduced.

  Further, as described above, when corrosive ballast water, chemicals, petroleum products, or the like is injected into the bag body 10 by the corrosive liquid supply / discharge device 13a, it is necessary to consider the problem of corrosion to the tank. Accordingly, since it is not necessary to sufficiently coat the steel plate surface on the inner surface of the tank or to make the tank itself a corrosion-resistant material, it is possible to greatly reduce the cost for the corrosion prevention.

  In the above description, the case where the bag body 10 is installed in the wing tank 5 and the fuel tank 5a has been illustrated. However, the bag body 10 can also be installed in the center tank 4 or the like. Since different types of liquids can be loaded with 10 separated, the utilization efficiency of the tank can be increased.

  FIG. 3 shows another example of the embodiment of the present invention. A partition wall 19 that divides the wing tank 5 or the fuel tank 5a into an upper chamber 17 and a lower chamber 18 is installed. The case where the said bag body 10 is installed in each of the chamber 18 is shown. According to this embodiment, since different kinds of liquids can be loaded in each of the upper chamber 17 and the lower chamber 18, the utilization efficiency of the tank can be further increased.

  In addition, this invention is not limited only to the said form, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

It is a cutting front view showing an example of the form of the hull tank structure of the present invention. FIG. 2 is a cut side view of FIG. 1. It is a cutting | disconnection front view which shows the other example of the form of the hull tank structure of this invention. It is a cut front view showing an example of a hold of a crude oil tanker.

Explanation of symbols

1 Hull 4 Center tank (tank)
5 Wing tank (tank)
5a Fuel tank 10 Bag body 13 Bag body supply / discharge device 13a Corrosive liquid supply / discharge device 16 Tank supply / discharge device

Claims (5)

  A hull tank structure comprising a bag body capable of containing a liquid in a tank of a hull, and a bag body supply / discharge device for injecting and discharging liquid at least into the bag body.   The hull tank structure according to claim 1, further comprising a tank supply / discharge device for injecting / discharging liquid from / to a bag body inside the tank.   The hull tank structure according to claim 1 or 2, wherein the bag supply / discharge device is a corrosive liquid supply / discharge device.   The hull tank structure according to claim 1, wherein the tank is a wing tank.   The hull tank structure according to claim 1, wherein the tank is a fuel oil tank.

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