The utility model relates to a reducing trachea on-line hydrops processing technique field, in particular to pipeline hydrops drainage ware. The device's casing lower extreme is equipped with the flange, and the drainage tube upper end is equipped with the joint, and drainage tube upper portion is equipped with the handle, and the drainage tube bottom is left to have and is helped the round with the drainage tube central passage is linked together, in the casing is inserted to the drainage tube lower part, is equipped with and presses cap upper end inner wall of thread assorted screw thread and can be through rotatory along pressing cap upper end inner wall of thread reciprocate on the drainage tube outer wall, presses cap lower extreme inner wall to be connected with the casing upper end, and casing upper portion is equipped with interior step, is equipped with the filler in this on the step, and the glan compresses tightly to pack and makes casing and drainage tube seal. The utility model discloses a can effectively the discharge hydrops of reducing trachea on-line, the flexibility is strong, prevents the pipeline corrosion, freezes problems such as stifled throttle, pressure oscillation, prolongs long pipeline life, reduces gas transmission humidity, has ensured the security of natural gas use.