Head Module Assembly for Large-Scale Containers
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Solution Overview
Problem
The existing methods for manufacturing large-scale containers, such as steel safety shells, face issues like excessive material costs due to large cutting margins, additional assembly steps, and on-site measurement challenges that affect construction schedules and quality, particularly during the assembly of head modules and cylindrical bodies.
Innovation Solution
A method involving the use of a head module composed of multiple petals and a cylindrical ring formed by connecting steel plates, where the end surface is adjusted to match a theoretical intersection line, allowing for precise assembly and reducing material waste and on-site adjustments, with the cylindrical body divided into intermediate rings based on maximum lifting weights to optimize construction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large cutting margin is provided at the open end of the annular opening to prevent adverse affection on ovality during transporting or lifting, then the level of the intersection line is ensured, but material cost increases
Solution Approach 1:
The patent applies preliminary action by providing a reinforcing ring at the open end of the annular opening before transporting or lifting the bottom head. This reinforcing structure is installed in advance to maintain the ovality of the intersection line during handling, eliminating the need for excessive cutting margins and reducing material waste while ensuring manufacturing precision.
2Strength
If a reinforcing ring is welded to the upper section of the reserved portion to strengthen the stiffness of the open end during lifting, then the stiffness is improved, but additional assembling steps and material cost increase
Solution Approach 1:
The patent merges the reinforcing ring structure with the existing head module design by integrating it into the annular opening configuration. The reinforcing ring is positioned and welded as part of the standard assembly process, combining the reinforcement function with the structural design rather than adding it as a separate complex assembly step.
3Manufacturing precision
If the cutting line for the intersection line is measured and determined on-site at the nuclear island area, then the precision of the intersection line is ensured, but the construction process is affected by more cross-constructions and schedule control is lost
Solution Approach 1:
The patent applies preliminary action by providing a reinforcing ring structure that maintains the ovality of the intersection line during transporting and lifting. This allows the cutting line to be determined and marked in advance at the manufacturing site rather than requiring on-site measurement and cutting at the nuclear island area, thereby regaining schedule control while maintaining precision through the reinforcing structure's protective effect.
4Ease of manufacture
If the unfitness of joint circular seams is difficult to adjust or control during assembly, then the assembly process is simplified, but the installation quality is affected and assembling progress may be slowed down
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of the head module through the reinforcing ring structure. The reinforcing ring adjusts the dimensional parameters and structural rigidity of the annular opening, enabling better control over the fit and alignment of joint circular seams during assembly, thereby improving installation quality without significantly complicating the assembly process.
Data Source
AI summary
A head module for a large-scale container, a large-scale container having the head module, and methods for manufacturing the head module and the large-scale container. The method for manufacturing a head module comprises providing a head having an annular opening, the head being composed of a plurality of petals, providing a plurality of cylinder plates, and forming a head cylindrical ring, connecting in order the plurality of cylinder plates to the end surface of the annular opening and joining facing sides of all adjacent cylinder plates. Based on the unfitness of the petals at the annular opening of the head, gaps between adjacent cylinder plates may be adjusted, and/or the positions of the cylinder plates on the end surface of the annular opening of the head may be adjusted radially inwards or outwards.