Multifunctional pipeline purging foreign matter collecting device

The utility model discloses a multifunctional pipeline blowing foreign matter collecting device which comprises a straight pipe section, and an inclined pipe section communicated with the straight pipe section is fixedly connected to the lower portion of a straight pipe section body. The inlet end of the straight pipe section is connected with one end of the variable-diameter flange group, and the other end of the variable-diameter flange group is connected with the tail end of the purging pipe; the inner diameter of the straight pipe section is larger than that of the purging pipe; the variable-diameter flange group sequentially comprises a fourth flange, a fifth flange and a sixth flange which are coaxially arranged, and the inner diameters of the fourth flange, the fifth flange and the sixth flange are sequentially increased; and a filtering device or a target plate is mounted at the outlet end of the straight pipe section. The multifunctional pipeline blowing foreign matter collecting device can collect f