Heat Insulating Sheet Notches for Tank Dome Conformity
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Solution Overview
Problem
Existing tank manufacturing methods fail to effectively distribute a heat-insulating and fire-resistant expanded graphite layer across the entire periphery of a tank, particularly in the dome portions, which is crucial for weight reduction and enhanced safety.
Innovation Solution
A manufacturing method involving a structural body with a liner and a fiber-reinforced resin layer, where a heat-insulating sheet with notches is wound around the tank, providing adhesive layers on the dome forming portions to facilitate easy attachment of tank protectors and ensuring heat insulation, with varying insulation performance to allow pressure release through a fusible plug valve when heated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat insulating sheet is wound around the entire structural body including dome portions, then heat insulation coverage is improved, but the sheet cannot properly conform to the curved dome surfaces
Solution Approach 1:
The heat insulating sheet is divided into a cylindrical portion and separate dome forming portions. The dome forming portions are cut out to correspond to the dome portions, allowing them to be separately shaped and attached to conform to the curved surfaces, while the cylindrical portion remains as a continuous wound sheet.
Solution Approach 2:
Different regions of the heat insulating sheet are designed with different structures: the cylindrical portion is wound continuously around the cylindrical portion of the structural body, while the dome forming portions are separately provided with notches and adhesive layers to specifically conform to and adhere to the dome portions.
2Manufacturing precision
If adhesive layers are applied separately to dome forming portions after winding, then attachment precision is improved, but manufacturing complexity increases
Solution Approach 1:
Adhesive layers or adhesive agents are provided in advance on the dome forming portions during the sheet preparation stage. This preliminary preparation eliminates the need for separate adhesive application steps after winding, reducing manufacturing complexity while ensuring precise attachment.
Solution Approach 2:
The adhesive layers are integrated into the heat insulating sheet structure itself, combining the insulation function and the attachment function into a single component. This merging eliminates the need for separate adhesive application processes.
3Reliability
If uniform heat insulation is provided across all tank surfaces, then safety is improved, but pressure release through fusible plug valve is hindered
Solution Approach 1:
The heat insulation performance is made non-uniform by providing different insulation characteristics in different regions. Specifically, the heat insulation performance in the dome portion where the fusible plug valve is located is designed to be lower than in other dome portions, allowing heat to reach the valve for pressure release while maintaining insulation elsewhere.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for uniform heat insulation and fire resistance across the tank, including dome portions, while reducing weight and ensuring safety by enabling pressure release, thus addressing the challenge of distributing expanded graphite effectively.
Implementation Method 1
a heat insulating sheet having notches in dome forming portions provided to correspond to the dome portions
Implementation Method 2
The heat insulating sheet may include adhesive layers or adhesive agents on opposite surfaces of the dome forming portions
Implementation Method 3
Expanded graphite that expands by heating to exhibit fire-resisting and heat-insulating properties
Implementation Method 4
the fusible plug valve connected to the mouth piece is operated by heating the fusible plug valve, so that the pressure of the tank can be released
Data Source
AI summary
A manufacturing method for manufacturing a tank includes: a step of forming a structural body constituted by a liner and a fiber reinforced resin layer placed on the outer periphery of the liner, the structural body including a cylindrical portion and dome portions provided in opposite ends of the cylindrical portion in the axial direction of the cylindrical portion; a step of winding a heat insulating sheet around the fiber reinforced resin layer after the step of forming the structural body, the heat insulating sheet having notches in dome forming portions provided to correspond to the dome portions; and a step of covering the dome portions with the dome forming portions.