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热风阀为高炉冶炼所使用的一种重要设备。在送风期,热风阀打开,所有热空气(1100～1300℃,0.3～0.5MPa)都要经过热风阀送往高炉;在热风炉燃烧期,热风阀关闭,热风阀面向热风炉的一侧承受很大的热负荷。密封性能的好坏是衡量热风阀质量的重要标志之一。长期以来,热风阀阀盖上两阀杆孔处的密封,一直靠填料盒中加耐火纤维绳填料,再用压盖压紧的办法来密封。由于该阀为常开常闭阀,阀杆和阀盖上配合孔相对运动频繁,加之该阀工作介质为高温高压气体,上述密封装置的可靠性较差,使用中每隔2～3个月阀盖上两阀杆配合孔处就出现严重泄漏,被迫停风检修,这不仅费工费时,更重要的是严重影响高炉的正常生产,所以改进热风阀阀杆密封装置显得十分迫切。为此,我厂有关技术人员经过努力攻关,应用新材料,采用新设计,制造出了新一代浮动密封装置,经实践验证,效果良好。
Hot air valve is an important equipment used in blast furnace smelting. In the air supply period, hot air valve is opened, all hot air (1100 ~ 1300 ℃, 0.3 ~ 0.5MPa) are sent through the hot air valve to the blast furnace; hot air stove combustion period, the hot air valve is closed, hot air valve side of the hot stove To withstand a great heat load. Good or bad sealing performance is one of the important signs of the quality of hot air valve. For a long time, hot air valve cover valve stem hole at the two seals, packing box has been filled with refractory fiber rope filler, and then pressed gland way to seal. As the valve is normally open normally closed valve, stem and valve cover with the relative movement of the relative holes frequently, coupled with the valve working medium is high temperature and pressure gas, the reliability of the sealing device is poor, the use of every 2 to 3 months Valve stem on the two stem with the hole at the serious leakage, was forced to stop the wind maintenance, which is not only time-consuming work, more importantly, seriously affect the normal production of the blast furnace, so to improve the hot air valve stem sealing device is very urgent. To this end, I plant the relevant technical staff through efforts to tackle key issues, the use of new materials, the use of new designs to create a new generation of floating seal, proven by practice with good results.