Changeable porous tubular aerator

The utility model discloses a variable micropore tubular aerator including support tube connected to an air manifold tube through connecting piece, a plurality of gas distribution grooves on outer surface along support tube direction, wherein said distribution grooves are connected to the air manifold tube through tube cavity of the support tube, a membrane cover made of elastic material on out surface of the support tube, wherein a plurality of self-closed micropore are opened on said membrane cover. The utility model is characterized by that when aeration, the air manifold tube and the tube cavity of the support tube inter said gas distribution grooves, the micropore on membrane cover made of elastic material splays by gas pressure and generates a plurality of fine and even bladders sending oxide into water, then area of interface promotes greatly, utilization ratio of oxide is as high as above 40% and oxygen power efficiency is as high as 9.6kgO [2]/kWh. the membrane coverer having high elastic ability is capable of being made thin thereby loss of gas pressure is lower, also power consumption and running cost are lower. At the same time the utility model has simple structure and convenience fixation and disassembly.