Welding method for flute pipe of pulverized coal lock hopper

The invention provides a welding method for a whistle pipe of a pulverized coal lock hopper, which comprises the following steps of: opening a manhole of the pulverized coal lock hopper, and confirming whether residual pulverized coal exists in a cavity of the pulverized coal lock hopper or not; after it is confirmed that no residual pulverized coal exists, a whistle pipe of the pulverized coal lock hopper is cleaned, and the whistle pipe is cut; the guide pipe is cut, and the flute pipe and the guide pipe are beveled; making a flute pipe holding clamp; the boss and the flute pipe are welded, and the integrated double-filter-disc flute pipe is manufactured; and the integrated double-filter-disc flute pipe is welded with the guide pipe, and the integrated double-filter-disc flute pipe is welded with the pulverized coal lock hopper through the flute pipe holding clamp. Through the technical scheme provided by the invention, the problems that a flute pipe welding seam of the pulverized coal lock hopper is easy t