Dryer anti -inversion device

The utility model discloses a dryer anti -inversion device, including an iron winds section of thick bamboo, the cruiser monitor pedestal also comprises a support rod, two semicircular anti -inversionapron, pin and pivot, the bracing piece sets up in an iron winds section of thick bamboo perpendicularly, the anti -inversion apron sets up respectively in bracing piece both sides and articulated through pivot and bracing piece, the pin sets up and is close to iron winds section of thick bamboo air intake one side at the anti -inversion apron, when the colliery normally ventilates in the pit, the anti -inversion apron is automatic open under the portable blower wind pressure in the iron winds section of thick bamboo, the normal air feed of an iron winds section of thick bamboo, when freeingthe gas accident, outstanding gas pressure is greater than auxiliary ventilating fan and produces the wind pressure, the anti -inversion apron is closed under the pressure effect of outstanding gas, thereby seal an iron winds