Speed reduction dust collector

(B, ) the utility model relates to a dust collector technical field is a speed reduction dust collector, it includes vent line and stationary magazine creel, stationary magazine creel fixed mounting is in vent line's inboard, at the clear width fixedly connected with of stationary magazine creel main current -limiting piece two at least, has at least one (b) (b) sprue in the periphery of main current -limiting piece. The utility model has the advantages of reasonable and compact structure, convenient to use, the cooperation through vent line, stationary magazine creel, main current -limiting piece and supplementary current -limiting piece uses, has effectively reduced the velocity of flow that returns out gas in the shaft bottom to can adsorb partial shaft bottom and return out the detritus that carries in the gas, improve follow -up dust collecting equipment's life. (B, )