指出避难硐室防护密闭门密封性能的影响因素,讨论了关键技术工艺设计,包括门框焊接工艺、门体密封面的加工及铰链的焊接工艺。采用振动时效法消除焊接应力,很好地控制焊接变形。对焊接应力消除技术及密封检验工艺等方面进行了研究,提出了采用充气压降方式检测防护密闭门的密封性,实现了密封性能的可量化性,并且可以准确地判定产品密封性能,提高了产品的质量。 The influencing factors of the sealing performance of the airtight chamber protection airtight door are pointed out. The key technological process design is discussed, including the door frame welding process, the door sealing surface processing and the hinge welding process. Vibration method to eliminate the use of welding stress, good control of welding deformation. The welding stress elimination technology and seal inspection technology were studied. The method of using inflation pressure drop to detect the tightness of the protective door and the quantification of the sealing performance were proposed, and the sealing performance of the product could be accurately judged. Quality of products.