Long-span bridges, including suspension bridges, cable-stayed bridges, and steel box girder structures, are characterized by high construction elevation, long working distances, and extended continuous spraying durations.
In thermal spray zinc coating systems, the wire feeding system must operate continuously. Any wire breakage or feeding interruption directly affects construction continuity.
If zinc wire diameter fluctuates beyond equipment tolerance, uneven pressure occurs on feeding rollers. Over time, this leads to localized stress concentration and wire breakage.
Low-quality zinc wire may have inconsistent crystal structures or higher impurity levels, reducing its ability to withstand bending and tensile stress.
Surface oxidation or scratches increase feeding resistance. Long-term friction may lead to localized fatigue failure.
Stable wire diameter is the fundamental condition for maintaining feeding system stability, effectively reducing mechanical impact and uneven stress distribution.
Using 99.9%–99.995% high-purity zinc wire is recommended. High-purity materials have more uniform crystal structures, improving fracture resistance.
Low-oxidation and smooth-surface zinc wire reduces friction variation, lowering the probability of fatigue failure.
Uniform winding tension prevents localized over-stretching or slack, especially important in long-distance continuous spraying projects.
In long-span bridge corrosion protection projects, zinc wire is used for main cable and girder protection, high-elevation steel spraying, and large-area continuous coating applications.
Wire breakage issues in long-span bridge spraying projects are not purely equipment failures but the result of interactions between material properties, dimensional control, and operational load.
In system optimization, zinc wire diameter consistency, material purity, and surface quality are key control factors for reducing breakage risk.
Người liên hệ: Mr. xie
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