But empty air impact of detonation -proof hits automation that ripples destroyed air door that kick -backs

The utility model discloses a but empty air impact of detonation -proof hits automation that ripples destroyed air door that kick -backs, including the frame that upright sets up the metal in the tunnel, set up the brick wall between frame and tunnel lateral wall, set up the door leaf of the metal of two flat -opens in the square door frame in frame middle part and set up automation between thesetwo door leafs and the frame mechanism of kick -backing through the hinge, automatically it includes front end in two connector plates of the left and right sides of two door leafs welded of door frame to kick -back the mechanism, weld the hoop on connector plates, weld in controlling two positive hoops of door leaf, connect in the extension spring between the hoop of left side connector plates'shoop and left side door leaf and be connected the extension spring between the hoop of right side connector plates's hoop and right side door leaf, distance between connector plates's the hoop and thehoop of corresponding door