Big pipe diameter is with gasbag sealing device who exempts from reducing packing ring

The utility model discloses a big pipe diameter is with gasbag sealing device who exempts from reducing packing ring, aerify the expanded pneumatophore including placing between sleeve pipe and cable, the pneumatophore around the cable and with the outer surface contact of cable. The utility model discloses a big pipe diameter is with gasbag sealing device who exempts from reducing packing ring's advantage is simple structure, adopts a whole product shutoff, inflates the back pneumatophore and evenly packs piping space, reduces the clearance, and the shutoff effect is better, no seam, and the leakproofness is better, and the construction operation is more simple and convenient, need not add and establish the rubber packing ring, and is easy and simple to handle. 本实用新型的大管径用免变径垫圈的气囊密封装置，包括放置于套管与拉索之间的充气膨胀的气囊体，气囊体围绕拉索并与拉索的外表面接触。本实用新型的大管径用免变径垫圈的气囊密封装置的优点为结构简单，采用个整体产品封堵，充气后气囊体均匀填充管道空间，减少间隙，封堵效果更好，无接缝，密封性更好，施工操作更简便，不需要加设橡胶垫圈，操作简便。