Cargo hold structure for a very large crude oil carrier

Patent metadata

Field	Value
Publication number	US-9238500-B2
Application number	US-201013642876-A
Country	US
Kind code	B2
Filing date	Oct 28, 2010
Priority date	Apr 27, 2010
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

A cargo hold structure for an oil tanker is provided, in which a plurality of vertical webs that is mounted on longitudinal bulkheads of the cargo hold in a height direction of a hull is made wide and horizontal girders which connect the vertical webs to each other and support them, thereby controlling the sloshing load of the cargo hold and improving the structural strength of the cargo hold without having to mount crossties. The cargo hold structure includes a longitudinal bulkhead ( 20 ) arranged in a lengthwise direction of a hull to divide an internal space, a plurality of vertical webs ( 22 ) coupled onto the longitudinal bulkhead ( 20 ) in a height direction of the hull, the vertical web ( 22 ) having a width of 0.15 to 0.20 times the total height (H) of the cargo hold, and a horizontal girder ( 24 ) arranged between the vertical webs ( 22 ) in the lengthwise direction of the hull, the level of the horizontal girder ( 24 ) being within 30% to 60% of the total height (H) of the cargo hold from the bottom thereof.

First claim

The invention claimed is:

1. A cargo hold structure for a very large crude oil carrier comprising:
two longitudinal bulkheads respectively having first and second sides and arranged in a lengthwise direction of a hull to divide an internal space, wherein the internal space is adapted for holding crude oil on the first and second sides of the longitudinal bulkheads, and wherein no crossties are attached to the two longitudinal bulkheads;
a plurality of vertical webs coupled onto the two longitudinal bulkheads in a height direction of the hull, the vertical web having a width of 0.15 to 0.20 times the total height (H) of the cargo hold; and
a horizontal girder arranged between the vertical webs along the lengthwise direction of the hull.

2. The cargo hold structure for a very large crude oil carrier according to claim 1 , wherein the level of the horizontal girder is within 30% to 60% of the total height (H) of the cargo hold from the bottom thereof.

3. The cargo hold structure for a very large crude oil carrier according to claim 1 , wherein the vertical webs are interconnected by a plurality of stiffeners, which are arranged in a lengthwise direction of the hull and disposed in a stacked form in a height direction of the hull between the vertical webs.

4. The cargo hold structure for a very large crude oil carrier according to claim 3 , wherein the horizontal girder and the stiffener have first ends that are connected to the longitudinal bulkheads.

5. The cargo hold structure for a very large crude oil carrier according to claim 1 , wherein the horizontal girder has a width that is equal to or smaller than that of the vertical web.

6. The cargo hold structure for a very large crude oil carrier according to claim 1 , wherein an end portion of the vertical web is integrally provided with a first reinforcing part, a width of which gradually increases so that a free end portion thereof is formed into a circular rounded portion, the first reinforcing part being coupled to a target site of a deck and an inner bottom plate, or a deck transverse and a girder.

7. The cargo hold structure for a very large crude oil carrier according to claim 1 , wherein an end portion of the horizontal girder is integrally provided with a second reinforcing part, a width of which gradually increases so that a free end portion thereof is formed into a circular rounded portion, the second reinforcing part being coupled to the vertical web.

Assignees

• Namgung Mun
• Shon Sang Yong
• Kang Tae Woon
• Daewoo Shipbuilding & Marine

Inventors

• Namgung Mun
• Shon Sang Yong
• Kang Tae Woon

Classifications

• B63B3/32

  Web frames; Web beams · CPC title

• B63B3/26 Primary

  Frames · CPC title

• B63B25/08 Primary

  fluid {(constructional features of bunkers B63B11/04; tanks for fuel or the like not forming bunkers B63B17/0027)} · CPC title

• B63B3/28

  of transverse type; Stringers · CPC title

• B63B25/12

  closed · CPC title