Drainage device of overhead steam pipe

The invention discloses an overhead steam pipe drainage device which comprises a fixed cleaning unit, an expansion fixing assembly, a scraping assembly arranged on one side of the expansion fixing assembly, two water collecting assemblies symmetrically arranged at the two ends of the scraping assembly, and a driving assembly hinged to the side wall of the scraping assembly. The flow guide assembly is arranged at the bottom of the expansion fixing assembly. The steam pipeline cleaning device has the beneficial effects that condensate water formed on the outer wall of the steam pipeline is cleaned through the fixed cleaning unit, the expansion fixing assembly supports and fixes the steam pipeline and adapts to the diameter change of the steam pipeline, and the supporting stability of the steam pipeline is improved; the driving assembly is started to drive the scraping assembly to scrape condensate water formed on the outer wall of the pipeline, the condensate water enters the water collecting assembly through d