High-pressure heater pipeline cleaning and connecting structure and mounting method thereof

According to the high-pressure heater pipeline cleaning and connecting structure and the mounting method thereof, a channel of a manhole door is oval, a connecting pipe is arranged in the channel, an inner flange and an outer flange are arranged on the two sides of the channel respectively, the outer flange is opposite to the inner flange, and the inner flange and the outer flange on the two sides are tensioned, clamped and fixed to the two sides of the channel through tensioning bolts; the pipeline cleaning connecting structure does not need to cut the manhole door of the high-pressure heater, is quickly connected with the cleaning pipeline, and is good in leakproofness and high in reliability. 本发明的一种高压加热器管道清洗连接结构及其安装方法，其人孔门的通道为椭圆形，通道内有连接管，通道两侧分别设置内、外法兰，外法兰与内法兰相对，拉紧螺栓将两侧的内、外法兰拉紧夹持固定于通道两侧；该管道清洗连接结构，不必对高压加热器人孔门进行切割，与清洗管道连接快速，密闭性好，可靠性强。