Cement silo outlet arch breaking ejection device

The utility model discloses a cement silo outlet vault breaking and ejecting device which comprises a material poking rod, a material pushing rod, a pushing rod, a pushing rod, a pushing rod, a pushing rod and a pushing rod, and the material poking rod is internally provided with an air supply flow channel; the crushing head is arranged at one end of the poking rod, a containing cavity is formed in the crushing head, an air inlet and a nozzle which are communicated with the containing cavity are formed in the crushing head, and the air inlet is connected with the air supply flow channel; the valve element is movably arranged in the containing cavity between the closing position where the air inlet is sealed and the opening position where the air inlet is opened. And the elastic piece normally drives the valve element to move towards the closing position. According to the embodiment of the utility model, the vault-breaking ejection device at the outlet of the cement silo can prevent cement dust from flowing ba