Triple-Shell Tank Opening Layout for Parallel Construction
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Solution Overview
Problem
The construction of triple shell tanks for low temperature liquefied gases is prolonged due to the need for sequential installation of inner, intermediate, and outer tanks, which disrupts the smooth progress of construction work and hinders the shortening of the construction period.
Innovation Solution
A method for constructing a triple shell tank that optimizes the opening aspect of construction openings by overlapping first, second, and third openings in the circumferential and height directions, ensuring a linear work traffic line, allowing parallel installation of the tanks and facilitating the entry and exit of workers and materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If construction openings are opened on the side plates of inner tank, intermediate tank, and outer tank to enable parallel installation, then the construction period can be shortened, but the openings may disrupt the smooth progress of construction work if not appropriately disposed
Solution Approach 1:
The patent merges the functions of multiple construction openings by making them overlap in the circumferential direction. The first construction opening in the outer tank side plate, the second construction opening in the inner tank side plate, and the third construction opening in the intermediate tank side plate are positioned to overlap, creating a unified access point that serves all three tanks simultaneously. This eliminates the need for separate openings and maintains smooth workflow while enabling parallel installation.
Solution Approach 2:
The patent utilizes the radial dimension by opening construction openings on different side plates (inner, intermediate, and outer tanks) that overlap when viewed from the radial direction. This dimensional approach allows workers and materials to access all three tanks through a single overlapping opening configuration, resolving the conflict between shortening construction period and maintaining operational smoothness.
2Productivity
If the first construction opening and the second construction opening are opened with AR1≥AR2, then the overlapping opening aspect is optimized for parallel installation, but the opening areas must be carefully controlled
Solution Approach 1:
The patent specifies a parameter relationship (AR1≥AR2) between the opening areas of the first construction opening in the outer tank and the second construction opening in the inner tank. This parameter control ensures that the overlapping openings are optimized for parallel installation while maintaining manufacturability. The area relationship provides a clear design guideline that balances productivity improvement with manufacturing precision requirements.
Data Source
AI summary
A method for constructing a triple shell tank including an inner tank, an intermediate tank, and an outer tank each having a roof and a side plate includes the following procedure. As construction entrances, a first construction opening is opened in an outer tank side plate, a second construction opening is opened in an inner tank side plate, and a third construction opening is opened in an intermediate tank side plate, each during the installation of the corresponding side plate. The construction openings are opened so as to partially overlap with one another in a circumferential direction and a height direction of the triple shell tank. The first construction opening and the second construction opening are opened so as to satisfy a relationship AR1≥AR2, where AR1 is an opening area of the first construction opening and AR2 is an opening area of the second construction opening.