Maintenance process of coke oven ascension pipes

The invention provides a maintenance process of coke oven ascension pipes. The maintenance process specifically comprises the following steps: performing preparation; opening a water seal cover of anascension pipe, opening a coal loading hole cover far away from the ascension pipe, installing an fire guiding tool on a coal loading hole, installing heat insulation blankets on two sides of the ascension pipe, introducing compressed air through a fire observation hole for pressing the fire, disassembling base bricks of the base of the ascension pipe, disassembling a bridge pipe filler, disassembling an ammonia water pipe on the bridge pipe; disassembling an ascension pipe top platform, an ascension pipe support and other related components, hoisting the whole ascension pipe to the ground, installing a fire blocking tool of the ascension pipe at the position where the ascension pipe is located before the hoisting, repairing the ascending pipe, the bridge pipe, a water seal, repairing thebridge pipe, the water sea