Carding machine rear licker-in air suction device

The utility model discloses a carding machine rear licker-in air suction device which comprises a main air suction pipe and three air suction pipes communicated with the main air suction pipe through corrugated pipes. A long hole is formed in the upper portion of each air suction pipe along the length direction, and an adjustable air supplement device is further disposed at the other end of the air suction pipe. Each adjustable air supplement device comprises a supplement head and an end cover correspondingly elastically connected with the supplement head, wherein four circular holes are formed in each of supplement head and the end cover. The diameters of the air suction pipes sequentially decreases from bottom to top. The diameters phi of the air suction pipes are sequentially 80mm, 70mm and 60mm from bottom to top. The diameters phi of the circular holes in the air supplement devices are sequentially 20mm, 15mm and 10mm from bottom to top. Each air suction pipe is made of plates 1.5mm in thickness. Each supplement head is made of nylon. The carding machine rear licker-in air suction device has the advantages that the device is simple in structure and safe and reliable, a licker-in air suction pipeline can timely suck falling impurities, air amount, negative pressure and energy are saved, production cost is lowered, and work efficiency is increased.