Secondary buffer dust removal cavity device for flexible connection

The utility model discloses a two-stage buffer dust removal cavity device for flexible connection, which comprises a feeding elephant trunk, a material blocking flange is arranged at the bottom of thefeeding elephant trunk, a material blocking protection lining plate is arranged at the bottom of the material blocking flange, a secondary material blocking flange is arranged at the bottom of the material blocking protection lining plate, and a secondary material blocking flange is arranged at the bottom of the secondary material blocking flange. A dust cover is arranged at the position betweenthe material blocking flange and the secondary material blocking flange; the dust cover fixed by the sealing clamping pipe is stable and reliable, and does not loosen; the material blocking protectionlining plate protects the dust cover completely, so that the integrity of the dust cover is ensured not to be damaged; meanwhile, a material blocking protection device is additionally arranged on thebasis of a common soft conn