Container House Manufacturing and Design
The manufacturing and design of container houses require comprehensive consideration of multiple factors, including structural type, material selection, thermal performance, connection nodes, surface corrosion protection, and production processes.
I. Structural Type Selection
Container houses can be classified into welded integral containers and bolt-connected modular containers based on their structure. Welded containers are formed by integral welding in the factory, with a direct load path and strong resistance to deformation, making them suitable for scenarios requiring frequent lifting and movement. Bolt-connected modular containers use standard plates connected by bolts, with multiple load-bearing nodes that require ensuring the tightness of each node, making them suitable for scenarios with high transportation flexibility requirements.
II. Material Selection and Modular Design
High-strength weathering steel (such as Q355B grade) is used as the main frame of the container body, which can increase the yield strength by about 30% and reduce material usage. Modular design forms a self-balancing system through rigid connections between corner fittings and side beams, eliminating the need for additional reinforcement components. The enclosure structure adopts a three-layer composite construction of 'rock wool-air layer-aluminum-zinc coated steel plate', with the rock wool layer thickness controlled between 75mm and 100mm, a thermal conductivity lower than 0.040 W/(m·K), and a 5mm air layer in the middle to suppress convective heat transfer, resulting in an overall heat transfer coefficient lower than 0.5 W/(m²·K).
III. Connection Nodes and Seismic Design
For areas with high seismic design intensity, a dual fixation mode of 'wedge lock + high-strength bolt' is introduced. The wedge lock is made of 45# steel through heat treatment, with a slope angle designed at 15 degrees, which can produce a self-locking effect under horizontal shear forces. Actual tests show that this node controls displacement within 3mm in a shaking table test simulating a rare earthquake of magnitude 8, which is about 40% better in deformation amplitude than conventional welded nodes.
IV. Surface Corrosion Protection and Lifecycle Management
The coating system adopts a combination of 'epoxy zinc-rich primer + polyurethane topcoat'. The primer contains more than 80% zinc powder, protecting the base metal through the sacrificial anode principle. The topcoat is added with nano-silica particles, achieving a hardness of 3H level, which can resist wind and sand erosion. In salt spray tests, this coating system withstands 1000 hours without red rust, equivalent to a 15-year protection period in coastal or industrial pollution environments, supporting a 25-year service life for the main structure of the container body.
V. Optimization of Industrial Production Processes
Through standardized design and industrial production, multiple processes originally dispersed at the construction site are concentrated in the factory for completion. The production process includes steel cutting, structural assembly, welding, corrosion protection, enclosure structure installation, and internal functional module construction, achieving coordinated advancement of multiple processes.
