我厂所用的RJJ—90—9T井式气体渗碳炉的排气管和滴油管均为17.7mm(0.5in)管和炉盖直接连接。使用中,管和炉盖相接部位,尤其是伸入炉内的钢管口部经常被碳黑堵塞,影响渗碳的正常进行。而且经烧结后结成硬块,清理比较困难。为疏通管路,常需旋下调节阀排气嘴,用铁条疏通,稍不注意就会 The RJJ-90-9T Pit Gas Carburizing Furnace used in our factory has 17.7mm (0.5in) pipe and lid directly connected to the exhaust pipe and drip pipe. In use, the pipe and the furnace cover connected parts, especially the mouth into the furnace steel pipe often blocked by carbon black, affecting the normal carburizing. And after sintering to form lumps, cleaning more difficult. To clear the pipeline, often need to unscrew the regulating valve exhaust nozzle, clear with iron, a little do not pay attention to it