JPH08119188A - Ore/oil carrier of double hull structure - Google Patents

Abstract

PURPOSE: To provide a piping structure for cargo oil pipings which can be applied to formation of a double hull structure for an ore/oil carrier. CONSTITUTION: An ore/oil carrier 1 is provided with a common hold 2 to contain ore or oil provided at a center part of the width of a hull body, and oil tanks 3, 3 to contain oil provided on both sides of the common hold 2. A bottom of the common hold 2, and bottoms and the vessel side of the oil tanks 3, 3 are provided with hollows 4, 7 to form a double hull structure. Lower end parts 6a, 6a of partition walls 6, 6 parting the common hold 2 and the oil tanks 3 from each other are formed in a fork shape along length of the partition walls 6, 6 to be expanded downward. Lower ends of the lower end parts 6a, 6a are in contact with a surface 9 of an inner hull at a bottom of the double hull structure, and spaces 8, 8 are formed there. Plural cargo oil pipes 5 are piped in the spaces 8, 8 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ore / oil tank ship having a double hull structure, and more particularly to a piping structure for a freight oil pipe in the ship.

[0002]

2. Description of the Related Art Ships are classified according to their use into commercial ships, fishing ships, work ships, special ships, and ships, and as a subclassification of commercial ships, they can be used for both ore carriers and oil carriers. Ore / oil carr
ier) is known. This ore-cum-oil tanker ship is more expensive to build compared to a completely dedicated ship such as an ore carrier ship or oil tanker ship, and it is a little harder to use than a dedicated ship, but due to the freight market situation at that time. Accordingly, it has a feature that it can be quickly transformed to be applied to any purpose.

FIG. 2 is a vertical cross-sectional view showing an example of a conventional ore / oil tanker vessel. As shown in FIG. 2, an ore and oil tanker vessel 1
Is provided with a combined use ship barbecue 2 that is capable of accommodating either ore or oil located in the center of the ship in the width direction, and oil tanks 3 on both sides of the ship that are located on both sides of the combined use ship barge 2 in the ship width direction. The dual purpose ship barge 2 and the oil tank 3 are separated by a substantially vertical partition wall 6 provided in the longitudinal direction of the hull. In such a conventional ore and oil tanker vessel 1, only the bottom of the combined vessel barge 2 is doubled, and the bottom and the side of the oil tank 3 are not doubled.

When the ore / oil tanker 1 having such a structure is used for ore carrier use, iron ore or the like is mounted in the center combined ship barge 2 and the oil tanks 3 on both sides and the vacant space at the double bottom. The (void space) 4 functions as an empty tank or a ballast section. On the other hand, when it is used for an oil tank vessel, oil is loaded on the dual-purpose ship carrier 2 and the oil tank 3 to form a cargo oil tank. In addition, the ore-cum-oil tanker 1 must, of course, have the original functions of a dedicated ore carrier and oil tanker.

When the ore-cum-oil tank ship 1 as shown in FIG. 2 is operated as an oil tank ship, as described above, the central combined-use ship barge 2 and the oil tanks 3 on both sides are used as oil tanks. When operating as a carrier, the oil tanks 3 on both sides are empty, and the ore is loaded only in the central combined vessel barge 2. Therefore, the bottom and side walls of the combined vessel barge 2 are made smooth, and the All timber members and bone members such as longe members are attached to the double bottom or both side oil tank sides. In such an ore / oil tanker vessel, since the ore is mounted, a cargo oil pipe for carrying oil in the tank cannot be arranged in the cargo ship barge 2 so that the cargo oil pipe 5 has a double bottom space 4 Piped through the inside (hereinafter referred to as "Prior Art 1").

[0006]

However, in response to an oil spill incident due to a ship accident that occurred in recent years, the revision of the Marine Pollution Treaty regarding tanker structural requirements for preventing oil spill from an oil tanker (oil tanker) was Maritime Organization (I
MO) ・ 150G adopted by the 32nd Marine Environmental Protection Committee (MEPC) and contracted after July 6, 1993
Oil tankers of T (Glostone) or higher (including ore and oil tanker) must now have a double hull structure. In addition, for the oil pipe, it is necessary to pipe above the outer wall (outer shell) of the ship, whichever is smaller than 2 m or 1/15 of the ship width, whichever is smaller. Therefore, even in an ore / oil tanker vessel, it is not possible to adopt a structure in which a petroleum oil pipe is piped in a double-bottomed space in the bottom of the vessel and in a ballast water tank.

Therefore, an object of the present invention is to provide an ore / oil tanker having a double hull structure having a piping structure capable of complying with the obligation to make a double hull structure due to the revision of the above-mentioned Marine Pollution Treaty. is there.

[0008]

According to the present invention, there is provided a combined ship barge for accommodating ore or oil, which is provided at a central portion in the width direction of a hull, and an oil provided on both sides in the width direction of the combined ship barge. In an ore-cum-oil tank ship having an oil tank for accommodating the combined-use ship and the oil tank having a double hull structure, a lower end of a partition wall separating the combined-use ship and the oil tank. Is formed bifurcated in the longitudinal direction of the partition wall and expanded downward so that the lower end thereof is brought into contact with the surface of the inner shell of the double-hulled hull to form a space by the lower end of the bifurcated surface and the surface of the inner shell. It is characterized in that a coin oil pipe is provided in the space.

[0009]

[Function] By forming a space by the lower end of the partition wall that separates the center ship barge and the oil tanks on both sides and the surface of the inner shell of the double hull at the bottom of the ship, the inner space of the double hull structure The oil pipes can be piped close to the surface of the shell. Therefore,
Piping is not required in the bottom of the double hull structure and in the voids on the side of the ship, and the above-mentioned convention regulations for oil spill prevention are satisfied.
Moreover, the piped oil oil pipe is protected by the space provided at the lower end of the partition wall, and the pipe is not damaged by the ore even if the ore is mounted on the combined cargo ship in the center. Moreover, since the partition wall is used, the design and construction are easy. Furthermore,
Seen from the oil tank side, the outer corners of the lower end of the dual-purpose boat hold are removed, and tank cleaning work becomes easier.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a vertical cross-sectional view showing one embodiment of an ore / oil tank ship of the present invention. As shown in FIG. 1, an ore-cum-oil tank ship 1 accommodates an ore-carrying barge 2 for accommodating an ore or oil provided in the center portion in the width direction of the hull, and an oil provided on both sides of the combined-use ship barge 2. The oil tanks 3 and 3 are provided. The bottom of the combined-use boat barge 2 and the bottoms and sides of the oil tanks 3 and 3 have a double hull structure. Reference numeral 4 denotes a void on the bottom of the double hull structure, and 7 denotes a void on the side of the double hull structure. Dual-purpose ship barge provided vertically to the longitudinal direction of the hull
Lower ends 6a, 6a of partition walls 6, 6 separating the oil tank 3 from the oil tank 3.
Is formed in a bifurcated manner in the longitudinal direction of the partition walls 6, 6 and is expanded downward. The lower ends 6a, 6a are in contact with the inner surface 9 of the inner shell of the double hull at the bottom of the ship, and here the lower ends 6a, 6a and the surface 9 of the inner shell of the double hull at the bottom of the ship are in contact. Spaces 8 are formed by and. In each of the spaces 8 and 8, a plurality of currency oil pipes 5 are arranged in the longitudinal direction of the ship.

When the ore / oil tanker vessel 1 is used for an oil tanker vessel, oil is loaded on the combined vessel barge 2 and the oil tank 3 to form a cargo oil tank. On the other hand, when it is used as an ore carrier ship, iron ore etc. is mounted in the central combined ship barge 2 and the oil tank 3 on both sides and the bottom space 4 and the side space 7 of the double hull are empty tanks or Functions as a ballast water tank. At this time, the oil pipes 5 piped in the spaces 8 and 8 are the lower end portions 6 a of the partition walls 6.
Protected by the ore, it will not be damaged even if ore is mounted on the dual use ship barge 2.

[0013]

As explained above, according to the present invention, the following industrially useful effects are brought about. By providing a space by the lower end of the bulkhead separating the ship's barge in the center and the oil tanks on both sides and the inner shell of the bottom of the double hull structure, inside the inner shell of the bottom of the double hull structure It is possible to connect the oil pipes in contact with each other. Therefore, piping is not required in the bottom of the double hull structure and in the space (void space) on the side of the ship, and the above-mentioned treaty regulations for oil spill prevention are satisfied. The piped oil oil pipe is protected by the space provided at the lower end of the partition wall, and is easy to maintain. Furthermore, even if the ore is mounted on the combined ship barge in the center, the pipe is not damaged by the ore. Design and construction are easy because partition walls are used. Seen from the oil tank side, the outer corners of the lower end of the dual-purpose boat hold are removed, and tank cleaning work becomes easier.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing one embodiment of an ore / oil tank ship of the present invention.

FIG. 2 is a vertical cross-sectional view showing an example of a conventional ore-cum-oil tanker ship.

[Explanation of symbols]

 1: Ore / oil tank ship 2: Combined ship hold 3: Oil tank 4: Double bottom space 5: Oil pipes 6: Partition wall 6a: Bottom wall of partition wall 7: Vessel side space 8: Space 9: Double bottom space Surface of inner shell of hull

Claims (1)

[Claims] 1. A combined ship barge for accommodating ore or oil, which is provided in a central portion in the width direction of a hull, and an oil tank for accommodating oil, which is provided on both sides of the combined ship barge in the width direction. In an ore-cum-oil tank ship in which the dual-use ship carrier and the oil tank have a double-hull structure, the lower end of the partition wall separating the dual-use ship carrier and the oil tank is bifurcated in the longitudinal direction of the partition wall. To form a space by the lower end of the bifurcated fork and the surface of the inner shell by contacting the lower end with the surface of the inner shell of the double hull of the ship bottom, An ore and oil tanker vessel with a double hull structure characterized by being piped.