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A Longitudinal Penetrating Hole Structure with a Keyhole

A technology of through holes and keyholes, which is applied in the direction of warships, hull parts, and hulls, can solve problems such as stress concentration and unfavorable labor productivity, and increase the area of ​​flow holes, improve labor productivity, and improve fatigue life and service life. Effect

Active Publication Date: 2018-07-20
SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem that the present invention aims to solve is that stress concentration tends to occur at the corner of the existing through hole, and the structure of the fan-shaped hole requires fillet welding, which is not conducive to labor productivity. A longitudinal bone with a key hole is provided through-hole structure

Method used

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  • A Longitudinal Penetrating Hole Structure with a Keyhole
  • A Longitudinal Penetrating Hole Structure with a Keyhole
  • A Longitudinal Penetrating Hole Structure with a Keyhole

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The following takes a 320,000 very large crude carrier (VLCC) as an example to illustrate the specific implementation.

[0027] Step 1: Arrange the bottom longitudinals on the bottom plate and determine the spacing between the bottom longitudinals;

[0028] Step 2: Select the structural form of the bottom longitudinal, such as T-shaped structure;

[0029] Step 3: Select the material of the longitudinal bone of the ship bottom;

[0030] Step 4: Calculate the geometric dimensions of the bottom longitudinal according to the requirements of the code, such as the thickness and width of the face plate of the T-shaped bottom longitudinal, and the thickness and height of the web;

[0031] Step 5: According to the code requirements and finite element analysis, obtain the material and structural dimensions of the transverse strength members, such as the plate thickness of the ribs, etc.;

[0032] Step 6: Design T-shaped structural through-holes on the double bottom floors accor...

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Abstract

The invention discloses a longitudinal through hole structure with key holes. The longitudinal through hole structure comprises through holes with T-shaped structures. The convex omega-shaped key holes are formed in the lower ends of sides of the through holes. The convex omega-shaped key holes and partners of the through holes are arranged on the same sides of the T-shaped structures. Chamfers are arranged at the lower ends of the other sides of the T-shaped structures. The lower edges of the partners are 100-150 mm from a bottom plate. The longitudinal through hole structure, provided by the invention, is especially suitable for a double bottom floor of an ultra large oil tanker, and can double as a drain hole of a ballast tank.

Description

technical field [0001] The invention relates to a longitudinal bone through hole structure with a key hole. Background technique [0002] VLCCs of 300,000 tons and above all have a double bottom structure, which is used to load ballast water to adjust the floating state of the ship when sailing. The ballast water in the ballast tank needs to be adjusted timely according to the loading conditions of the ship. When the ship is empty (cargo hold is empty), the double bottom ballast tank must be filled with ballast water; and when the ship is full (cargo hold When full), the ballast water in the ballast tank must be emptied. In addition, in order to prevent and minimize the damage to the ecological environment of the port through the transfer of harmful aquatic organisms and pathogens through the transfer of ship's ballast water, the International Maritime Organization requires ships to exchange ballast water. That is: before the ship enters the port of destination, it needs t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B11/04
CPCB63B11/04
Inventor 甘水来张帆
Owner SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD