JPH045433Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a ballast tank installed on a ship.

Conventional technology As shown in Figures 2 and 3, conventionally, cargo ships,
A ballast tank 1 installed in a double bottom of a bulk carrier, a container ship, a liquefied gas carrier, etc. has generally had its interior divided into a plurality of partition walls 2 along the bow and stern directions and the width direction of the ship.

Problems that the invention aims to solve: Figure 2 shows an example of a small ship, and Figure 3 shows an example of a large ship.As is clear from the figures, the water supply and drainage pipe 3 requires a long distance, In particular, in the case of large ships, there are many cases in which a ring main system is adopted, so there is a problem in that the filling and drainage piping 3 needs to penetrate inside the tank, and the piping work and shipbuilding work need to be wrapped.

Means for Solving the Problem In order to solve the above problem, the ballast tank of the present invention is a ballast tank installed on a ship, the interior of which is divided into a plurality of parts only by a partition wall along the bow and stern direction, and a predetermined The partition wall is a curved wall that bends in the width direction of the ship, and the volume ratio in the length direction of each divided constituent tank is changed.

Effect With the above configuration, water supply and drainage piping is installed in each tank in a vertically divided structure. In this case, each tank is only divided into multiple parts in the width direction of the ship, and there is a single tank in the bow and stern direction, so an independent piping system can be adopted.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In Fig. 1, numeral 4 denotes a ballast tank according to the present invention which is installed in the double bottom of a cargo ship, bulk carrier, container ship, liquefied gas carrier, etc., and the interior is divided into three partition walls 5 and 6 along the bow and stern direction. , 7, and has a vertically divided structure. In this case, the partition wall 6 located on the center line of the ship is composed of a straight wall,
The partition walls 5 and 7 located on both sides of the straight wall 6 are formed of bent walls having a stepped portion bent in the width direction of the ship. That is, the volume ratio of the divided constituent tanks 8, 9, 10, 11 in the length direction is changed by the partition walls 5, 6, 7.

With such a configuration, the water supply and drainage pipes 12 are arranged in each of the constituent tanks 8 to 11 having a vertically divided structure. In this case, each of the constituent tanks 8 to 11 is simply divided into a plurality of parts in the width direction of the ship, and is a single tank in the bow and stern direction, so an independent piping system can be adopted.

Therefore, the valves 13 are all connected to the constituent tanks 8 to 11.
It will be outside.

Here, in order to adjust the heel of the ship, the starboard component tanks 10 and 11 must be replaced with the port component tanks 8 and 9.
Fill more water or do the opposite. In addition, in order to adjust the trim, either pour more water into the constituent tanks 9 and 10, which have a larger capacity on the bow side, than the constituent tanks 8 and 11, which have a larger capacity on the stern side (when attaching bow trim), or do the opposite. (when attaching stern trim). By operating in this way, it can perform the same function as a conventional ballast tank.

Note that the configuration of the present ballast tank 4 is applicable not only to a tank provided with a double bottom but also to a wing tank, for example.

Effects of the invention As described above, according to the invention, the water supply and drainage piping can be completed over a short distance, reducing material costs and simplifying the water supply and drainage piping work. Furthermore, since an independent piping system can be adopted, it is possible to eliminate the overlap between piping work and shipboard work, thereby shortening the construction period. Furthermore, by bending the specified partition walls in the ship's width direction, the volume ratio in the length direction of each divided tank can be changed, allowing trim and heel adjustments to be made in the same way as with conventional ballast tanks. .

[Brief explanation of the drawing]

FIG. 1 is a plan view of a double bottom ballast tank showing an embodiment of the present invention, and FIGS. 2 and 3 are plan views of a double bottom ballast tank showing conventional examples. 4... Ballast tank, 5, 6, 7... Partition wall.

Claims (1)

[Scope of utility model registration request] A ballast tank installed on a ship, in which the interior is divided into a plurality of parts only by a partition wall along the bow and stern direction, and each constituent tank is divided by forming a predetermined partition wall into a bending wall that bends in the width direction of the ship. A ballast tank characterized by changing the volume ratio in the length direction.