Marine purification air distributor

The utility model discloses a marine purification air distributor, which comprises an air distributor main body and a diffuser plate, one end of one side in the air distributor main body is provided with a circular mounting bin, one side of the circular mounting bin is provided with a groove, the middle part in the circular mounting bin is provided with an air inlet pipe B, and the air inlet pipe B is provided with an air outlet pipe B; an air inlet pipe A extending out of the circular mounting bin is arranged on one side of the air inlet pipe B, an arc-shaped through hole is formed in one side of the top of the circular mounting bin, a limiting rod is arranged on the top of the air inlet pipe A, and the limiting rod and the arc-shaped through hole slide mutually; through mutual cooperation of the casing pipe, the L-shaped groove, the sliding groove, the inserting rod, the sliding block and the spring and through elastic potential energy of the spring, the inserting rod is inserted into the casing pipe to ach