JP2597350Y2 - Double Hull Tanker Tank Corner Structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank structure of a double shell tanker, and more particularly, to a structure of a bow portion and a stern side corner portion of a ship side tank.

[0002]

2. Description of the Related Art As shown in FIGS. 11 and 12, a conventional single-hull tanker without a double shell structure has a tank bow side.
On the stern side of the tank, as shown in FIGS. 13 and 14, a central tank 3 partitioned by a vertical partition 2 is disposed at the center of the hull 1, and an (inner) vertical partition 2 and a hull outer plate 4 are provided. And a ship-side tank 5 for storing ballast water. At the end of the ship-side tank 5, a wastewater tank 5
a is provided.

[0003]

However, in the ship-side tank 5 of the tanker having the double shell structure, as shown by the imaginary line, the inner bottom plate 6 and the ship-side vertical partition 7 are provided, so that the ship-side tank 5 has two tanks.
The structure is divided into two. For this reason, especially the hull skin 4
Has a structure G that converges to a narrow portion where the ship-side longitudinal bulkhead 7 approaches the longitudinal bulkhead 2 and the inner bottom plate 6 at the bow corner and the stern corner that are curved toward the center of the hull. In many cases, the construction was difficult.

An object of the present invention is to solve the above problems and to provide a structure of a tank corner portion of a double hull tanker which is easy to work .

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a central tank formed by an inner longitudinal bulkhead, a ship-side longitudinal bulkhead, and an inner bottom plate which are arranged in the hull outer panel in the bow direction. And a bottom tank, an inner ship side tank, and an outer ship side tank, the inner ship side tank is formed through a partition wall at a lower end corner of at least one of the inner ship side tank of the bow portion and the stern portion of the inner ship side tank. An inner ship-side tank corner space is defined, and an opening is formed in the ship-side longitudinal partition wall of the inner ship-side tank corner space to communicate the inner ship-side tank corner space with the outer ship-side tank.

[0006]

[Function] The inner longitudinal bulkhead, the hull longitudinal bulkhead, and the inner bottom plate approach each other, forming a narrow overflow section at the lower part of the inner hull tank, at the lower corner of the inner hull tank, and through the opening to the outer hull tank. Since the inner tank-side tank space for communication is formed, sufficient strength can be ensured, and work such as welding and painting can be performed from the opening, so that work can be performed easily .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the structure of the tank corner portion of the double hull tanker according to the present invention will be described below with reference to FIGS.

In the hull 11 of the double hull tanker, a central tank 15 is formed by an inner vertical partition wall 12 on both sides, an inner bottom plate 13 and an upper deck 14, and the inner vertical partition wall 1 is formed.
2 and the inner bottom plate 13 and the bottom shell 16A, the bottom tank 17
Are formed, and the inner longitudinal partition wall 12 and the ship side outer plate 16B are further formed.
And the inner vertical passage bulkhead 12, the inner bottom plate 13, and the upper deck 14, an inner ship side tank 19 is formed by the ship-side vertical bulkhead 18, the lower end of which is connected to the inner bottom plate 13. An outer ship-side tank 20 is formed by the plate 16B and the inner vertical partition wall 12.

As shown in FIGS. 1 to 5, the tank forward corner is inclined so that the inner longitudinal partition wall 12 and the longitudinal ship partition wall 18 are closer to the hull center CL toward the bow in plan view. The lower part of the ship-side longitudinal bulkhead 18 is inclined so that the lower the lower part, the closer to the hull center CL. Then, at the bow side of Uchibuna side tank 19, the horizontal frame 22 spaced a predetermined compartment L _F from the transverse bulkhead 21 constituting the tank end
Side transverse bulkhead to the corresponding position along with (partition wall) 23 is attached, the transverse partition 21 and the side shell given from the inner bottom plate 13 between the horizontal barrier ribs 23 upper height H _F only hull in the bottom plate to the upper (partition wall) 24 Is attached to form an inner ship side tank corner space 25. A plurality of openings 26 are formed in the ship-side vertical partition wall 18 facing the inner ship-side tank corner space 25 so that the outer ship-side tank 20 and the inner ship-side tank corner space 25 communicate with each other.

The stern side corner of the tank is shown in FIGS.
As shown in the figure, the inner longitudinal bulkhead 12 and the ship-side longitudinal bulkhead 18 are each inclined so that the bow side approaches the hull center CL in plan view, and the lower part of the ship-side longitudinal bulkhead 18 becomes closer to the hull center CL as the lower side. It is inclined to approach. Then, at the stern side of Uchibuna side tank 19, the horizontal frame 32 spaced a predetermined compartment L _R from horizontal partition wall 31 constituting the tank end
With attached corresponding positions to the side transverse bulkhead (partition wall) 33 of a predetermined from the inner bottom plate 13 between the horizontal barrier ribs 21 and side transverse partition 23 the upper end height H _R only the top into ship's side the bottom plate (partition wall) 34 Are attached to form an inner ship side tank corner space 35. A plurality of openings 36 are formed in the ship-side vertical partition wall 18 facing the inner ship-side tank corner space 35 so that the outer ship-side tank 20 and the inner ship-side tank corner space 35 communicate with each other.

[0011] In the above construction, the ship-side outer plate 16B is closer to the bow side or the stern side on the bow side and the stern side, so that the center of the hull CL is higher.
Side, and further closer to the center of the hull CL as the bottom is approached, the inner longitudinal bulkhead 12, the longitudinal longitudinal bulkhead 18 and the inner bottom plate 13 also approach to form a narrow overflow section at the lower part of the inner vessel tank 19. I do. However, in the above-described embodiment, the inboard side tank corner spaces 25 and 35 which are separated from the inboard side tank 19 are formed at the corners of the inboard side tank 19, and the inboard side tank corner spaces 25 and 35 are connected to the ship side longitudinal bulkhead 18. The opening 26, 36 formed in the outer vessel side tank 20 communicates with the outer vessel side tank 20, so that a sufficient strength can be secured as compared with simply removing the narrow overflow portion at the lower part of the inner vessel side tank 19, and conversely, Compared to producing an inboard tank with an overflow, the opening 26,
Work such as welding and painting is possible from 36, making work easier
It can be carried out.

[0012]

[Effect of the Invention] As described above, according to the structure of the tank corner portion of the double hull tanker of the present invention, the hull outer plate is closer to the center of the hull toward the bow or stern, and is closer to the center of the hull toward the bottom. In order to approach, the inner longitudinal bulkhead, the ship-side longitudinal bulkhead, and the inner bottom plate also approach, forming a narrow overflow portion at the lower part of the inner ship-side tank. According to the above configuration, the opening portion is formed at the lower part of the inner ship-side tank. The inner ship side tank corner space communicating with the outer ship side tank is formed through the inner ship side tank, so that it is possible to secure sufficient strength compared to simply removing the narrow overflow portion of the inner ship side tank, and on the contrary, it has a narrow overflow portion Work such as welding and painting can be performed from the opening, and the work can be performed easily, as compared to manufacturing the inner ship side tank .

[Brief description of the drawings]

FIG. 1 is a plan partial cross-sectional view showing an embodiment of a tank corner portion of a double hull tanker according to the present invention and showing an inner bottom plate of a bow portion.

FIG. 2 is a partial plan view showing a tank corner of the bow.

FIG. 3 is a sectional view taken along line AA shown in FIG. 1;

FIG. 4 is a sectional view taken along line BB shown in FIG. 1;

FIG. 5 is a partial side sectional view showing a tank corner portion of the bow portion.

FIG. 6 is a plan partial sectional view showing an inner bottom plate of the stern tank corner portion.

FIG. 7 is a partial plan view showing the tank corner of the bow.

FIG. 8 is a sectional view taken along the line CC shown in FIG. 6;

FIG. 9 is a sectional view taken along the line DD shown in FIG. 6;

FIG. 10 is a partial side sectional view showing a stern tank corner portion.

FIG. 11 is a plan view showing a conventional bow tank corner.

FIG. 12 is a sectional view taken along the line EE shown in FIG. 11;

FIG. 13 is a plan view showing a conventional stern tank corner portion.

FIG. 14 is a sectional view taken along line FF shown in FIG.

[Explanation of symbols]

 11 Hull 12 Inner longitudinal bulkhead 13 Inner bottom plate 14 Upper deck 15 Central tank 16A, 16B Bottom outer skin 17 Bottom tank 18 Ship side longitudinal bulkhead 19 Inner ship side tank 20 Outer ship side tank 21,31 Horizontal bulkhead 23,33 Ship lateral bulkhead 24 , 34 Ship inner bottom plate 25,35 Inner ship tank corner space 26,36 Opening

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B63B 3/20 B63B 3/56

Claims (1)

(57) [Scope of request for utility model registration] 1. A double hull in which a central tank, a bottom tank, an inner ship-side tank, and an outer ship-side tank are formed by an inner longitudinal bulkhead, a ship-side longitudinal bulkhead, and an inner bottom plate which are arranged in the hull shell in the bow direction. In the tanker, at least one of the bow portion and the stern portion of the inner ship side tank has an inner ship side tank corner space defined by an inner ship side tank via a partition wall at a lower end corner portion of the inner ship side tank. A tank hull structure of a double hull tanker, characterized in that an opening is formed in a ship-side longitudinal partition wall of the space to communicate the inner ship-side tank corner space with the outer hull tank.