Dust blowing gun extension pipe capable of being freely bent and shaped

A dust blowing gun extension pipe capable of being bent and shaped, comprising:

• a flexible inner pipe (1), wherein the flexible inner pipe (1) is sleeved with a spring assembly (2), and the spring assembly (2) extends axially to two ends of the flexible inner pipe (1), wherein an outer portion of the spring assembly (2) is coated with a flexible coating layer (3), two ends of the flexible inner pipe (1) are respectively connected to a connector assembly (5), and the connector assembly (5) interacts with the flexible inner pipe (1) to form an air channel (16) for allowing compressed air to circulate, wherein the connector assembly (5) comprises a first connector (6) and a second connector (7), wherein the first connector (6) extends along the axial direction to be provided with a first extension portion (9), and the first extension portion (9) is sleeved between the flexible inner pipe (1) and the spring assembly (2), wherein an end portion of the flexible inner pipe (1) extends into the first connector (6), an end portion of the flexible inner pipe (1) is provided with a protruding ring (17), and the first connector (6) is internally provided with a limiting step portion (8) that interacts with the protruding ring (17), wherein the second connector (7) is in threaded connection with the first connector (6), wherein the second connector (7) extends along the axial direction and is provided with a second extension portion (18), wherein when the second connector (7) and the first connector (6) are tightened, the second extension portion (18) extends into the flexible inner pipe (1), so that the flexible inner pipe (1) is limited between the first connector (6) and the second connector (7).