Movable connector for pipe

The utility model relates to a movable connector for a pipe, in particular to a movable connector and belongs to the field of pipe fittings. The movable connector comprises a locknut and a pipe connector and is characterized in that the movable connector also comprises an O-shaped ring, wherein an annular groove is arranged on the pipe connector, and the O-shaped ring is arranged in the annular groove. In the utility model, the old structure that a rubber flat ring is added between the pipe connectors is abandoned, the annular groove is arranged on the pipe connector, and the O-shaped ring is arranged in the annular groove, so that connection is more stable; meanwhile, the O-shaped ring is protected by the annular groove and cannot be damaged by vibration and extrusion, and the airtight stability of the movable connector is maintained. The pipe connector is connected with the locknut through a fine thread, thereby having good self-locking performance without loosing in the high-frequency vibration, prolonging