The invention relates to a bag
dust collector. The bag
dust collector comprises an air
pipe, an air-intake three-way valve plate, an air suction
pipe, a blower, a blower air outlet
pipe, an air-outtake three-way valve plate, an air outtake pipe, an
exhaust pipe, a back blowing pipe, an upper
air chamber, in-bag frames, dust collecting bags, a
dust collector shell, a dust air pipe, a lower
air chamber,
relay valves and back blowing
branch pipes. The bag dust collector is characterized in that the dust collector is provided the upper
air chamber and the lower air chamber, the
exhaust pipe of the dust collector is connected with an air intake pipe of an air-intake three-way valve plate chamber, when the dust collector operates, the air-intake three-way valve plate closes the air pipe, and the blower air suction pipe is opened; the dust collection bags are installed in the lower air chamber, the frames are arranged inside the dust collection bags, and the dust air pipe is connected into a workroom; dust is discharged from a tapered hopper via the
relay valves; during back blowing and dust clearing, the air-outtake three-way valve plate opens the air pipe, the blower air suction pipe is closed, the air-outtake three-way valve plate opens the back blowing pipe, and the air outtake pipe is closed; a negative pressure chamber turns into a
positive pressure chamber quickly, dust adsorbed on the outer surfaces of the dust collection bags is blown off, and the bag dust collector returns to the dust collection state quickly.