Cold box steel structure and method for prefabricating and transporting same
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Solution Overview
Problem
The transportation of large-scale cold box steel structures for cryogenic air separation equipment often exceeds height limits during transportation, leading to increased on-site installation workload, potential delays, and reduced quality due to the need for separate transportation and assembly of equipment components.
Innovation Solution
The cold box steel structure is prefabricated into two partial components with adjusted heights to comply with transportation dimension restrictions, allowing for modular assembly and transportation, reducing on-site installation complexity and ensuring safe and efficient transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cold box steel structure is prefabricated as a single integrated unit, then the on-site installation workload is reduced and installation quality is improved, but the transportation height exceeds the maximum permitted transportation height limit
Solution Approach 1:
The cold box steel structure is divided into multiple modular sections along its height, with each section being transportable within the maximum permitted height limit. The sections include a bottom section, middle sections, and a top section, which can be assembled on-site to form the complete integrated structure, thereby reducing on-site installation workload while complying with transportation height restrictions.
Solution Approach 2:
The structure is segmented along the vertical dimension to comply with height restrictions, but the modular sections are designed to be assembled in the vertical dimension to achieve the full height. This dimensional approach allows transportation within limits while maintaining the capability for integrated assembly.
2Length of moving object
If the cold box steel structure is divided into multiple sections for transportation, then the transportation height complies with the maximum permitted limit, but the on-site assembly complexity increases and requires additional manpower and equipment
Solution Approach 1:
The cold box steel structure is segmented into standardized modular sections with pre-defined connection interfaces. Each section includes integrated support structures and connection components that simplify the assembly process, reducing on-site assembly complexity despite the multi-section configuration.
Solution Approach 2:
Connection components, support structures, and alignment features are pre-installed on each modular section during manufacturing. This preliminary preparation of connection elements significantly reduces the complexity of on-site assembly operations.
3Length of moving object
If the cold box steel structure is divided into multiple sections, then the transportation height complies with the maximum permitted limit, but the project time limit may be delayed due to increased assembly workload
Solution Approach 1:
The structure is divided into modular sections that can be transported independently and assembled in parallel operations. This segmentation enables multiple assembly activities to occur simultaneously, reducing the overall project duration despite the increased number of components.
Solution Approach 2:
All connection components, support structures, and alignment features are pre-installed during manufacturing before transportation. This preliminary preparation eliminates time-consuming on-site fabrication and adjustment operations, ensuring that assembly can proceed rapidly upon arrival.
4Length of moving object
If the cold box steel structure is divided into multiple sections, then the transportation height complies with the maximum permitted limit, but the installation quality may be affected due to increased assembly workload
Solution Approach 1:
The structure is segmented into modular sections with standardized connection interfaces that ensure precise alignment and consistent assembly quality. The modular design with predefined connection points maintains installation quality by reducing variability in the assembly process.
Solution Approach 2:
Connection components and alignment features are pre-installed with high precision during manufacturing under controlled workshop conditions. This preliminary precision work ensures that on-site assembly maintains consistent quality standards despite the multi-section configuration.
Data Source
AI summary
Disclosed in the present invention are a cold box steel structure and method for prefabricating and transporting the cold box steel structure. The cold box steel structure is a cuboid architecture, and has a long edge, a wide edge and a high edge of lengths L, W and H respectively, wherein L>W and L>H; the cold box steel structure comprises first and second rectangular base faces, each being an outer surface of the cuboid architecture comprising the long edge and the wide edge, and the cold box steel structure is prefabricated as two partial components taking a plane parallel to the rectangular base faces as a boundary; the total height of a first partial cold box steel structure component thereof, taking the first rectangular base face as a first transportation bottom face, is h1, and the total height of a second partial cold box steel structure component, taking the second rectangular base face as a second transportation bottom face, is h2; if the height difference between the transportation bottom face and the ground or a water surface is h, then (h1+h) corresponds to a transportation height of the first partial cold box steel structure component, and (h2+h) corresponds to a transportation height of the second partial cold box steel structure component; the transportation height of either of the cold box steel structure components should be smaller than a maximum permitted transportation height hmax.