LNG Tank Anchor Structure with Sliding Joint
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Solution Overview
Problem
Existing LNG storage tanks on ships face challenges with complex structures that complicate installation, reduce sealing reliability, and struggle to cope with hull deformation and stress concentration under LNG load.
Innovation Solution
An anchor structure with a horizontally slidable joint and insulator, featuring a primary and secondary sealing wall configuration, an anchor support rod, and a movable anchor support bolt cap, which relieves stress concentration and improves installation ease by allowing deformation absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex anchor structure with multiple components is used to ensure sealing reliability, then sealing reliability is improved, but device complexity increases and ease of manufacture deteriorates
Solution Approach 1:
The anchor structure is divided into modular components: anchor members with joints that can be independently positioned, separate insulation layers, and distinct sealing elements. This segmentation allows each component to be optimized independently while maintaining overall sealing reliability, reducing the complexity of the entire system.
Solution Approach 2:
The anchor members are designed with movable joints that can slide horizontally along the sealing wall. This dynamic capability allows the structure to adapt to hull deformation while maintaining sealing contact, ensuring reliability without requiring an overly complex fixed structure.
2Strength
If a fixed anchor structure is used to maintain structural integrity, then strength is improved, but adaptability to hull deformation deteriorates
Solution Approach 1:
The anchor members incorporate horizontal sliding joints that enable dynamic adjustment along the sealing wall while maintaining vertical structural integrity. This allows the structure to adapt to hull deformation without compromising strength.
Solution Approach 2:
The anchor structure allows for parameter changes in position and orientation through the sliding joints, enabling adaptation to varying hull shapes and deformations while maintaining the structural parameters needed for integrity.
3Reliability
If a complex anchor structure with multiple components is used to ensure proper insulation, then insulation effectiveness is improved, but ease of manufacture deteriorates
Solution Approach 1:
The insulation system is segmented into distinct layers and components that can be manufactured separately and assembled. This modular approach maintains insulation effectiveness while simplifying the manufacturing process for each individual component.
Solution Approach 2:
The anchor members are designed with nested structures where joints and insulation layers are integrated in a compact arrangement. This nesting reduces the overall complexity of manufacturing while maintaining the required insulation effectiveness.
Data Source
AI summary
The present invention relates to an anchor structure able to actively cope with hull deformation, and to a liquid natural gas storage tank and a production method for a liquid natural gas storage tank comprising the anchor structure. According to one embodiment of the present invention, an anchor structure is provided wherein an anchor structure, for linking a sealing wall and an inner wall of a liquid natural gas storage tank, comprises: an anchor member adapted such that a joining part, which is joined to the sealing wall, can slide horizontally; and a thermally insulating material formed around the anchor member.