The invention relates to the technical field of sealing structures, in particular to an air duct sealing structure based on a polyurethane sealant. The air duct sealing structure comprises a roof, baffles are arranged on the outer walls of the two sides of the roof through bolts, a plurality of supporting columns are welded between the inner wall of the top and the inner wall of the bottom of theroof, and a plurality of lightening holes are formed in the outer wall of one side of each supporting column; an air duct pipe is installed between the inner walls of the opposite sides of the bafflesthrough bolts, and an inner flange is welded to the outer wall of one end of the air duct pipe; and an outer flange is welded to the outer wall of the other end of the air duct pipe and installed onthe outer wall of one side of the inner flange through bolts, and a polyurethane sealant sealing layer is filled between the inner walls of the opposite sides of the inner flange and the outer flange.The air duct sealing structure has the beneficial effects that through the arrangement of the polyurethane sealant sealing layer, the polyurethane sealant has high tensile strength and cold resistance, and therefore the polyurethane sealant sealing layer can improve the sealing performance of a flange connector, and the sealing performance of the air duct is better.
本发明涉及密封结构技术领域,具体是一种基于聚氨酯密封胶的风道密封结构,包括车顶,车顶两侧外壁上均通过螺栓安装有挡板,且车顶顶部内壁与底部内壁之间焊接有若干个支撑柱,支撑柱一侧外壁上均开有若干个减重孔,挡板相对的一侧内壁之间通过螺栓安装有风道管,且风道管一端外壁焊接有内法兰。风道管另一端外壁焊接有外法兰,外法兰通过螺栓安装在内法兰一侧外壁上,内法兰和外法兰相对的一侧内壁之填充有聚氨酯密封胶密封层。本发明的有益效果本发明通过设置的聚氨酯密封胶密封层,聚氨酯密封胶具有较强的拉伸度和耐寒性,从而聚氨酯密封胶密封层能够提高法兰接口处的密封,使风道的密封性更好。
Air duct sealing structure based on polyurethane sealant
一种基于聚氨酯密封胶的风道密封结构
2021-01-29
Patent
Elektronische Ressource
Chinesisch
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