Recently, the mechanical industry standard "fastener pull-torsion composite testing machine" edited by State Grid Zhejiang Electric Power Company was approved and promulgated by the Ministry of Industry and Information Technology. This industry standard is the first cross-industry technical standard that the company has compiled with the first drafting unit.
It is reported that the standard specifies the technical requirements, inspection methods, inspection rules, signs and packaging of the pull-torsion composite testing machine for fastener thread fastening characteristics, and is applicable to research and application of electric power construction, machinery manufacturing, construction engineering, etc. field.
The technology originated from the Zhoushan large span project. The company developed the fastener series detection technology and device through the implementation of the quality inspection of large-size fasteners, the gradual refining technology, and the research on the relationship between the axial force and torque of fasteners. And related technologies have been authorized by the national invention patent, providing an important technical scale for the quality inspection and experimental research of hot-dip galvanized fasteners for transmission towers.
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