Mixed jet descaling device axially and eccentrically arranged for inner wall of pipe

Abstract

A mixed jet descaling device axially and eccentrically arranged for the inner wall of a metal pipe comprises a support rod () arranged inside the metal pipe (), the support rod being parallel to the central axis of the metal pipe, eccentrically arranged and not concentric with the central axis of the metal pipe; and at least two spray nozzle units () for spraying the mixed jet, the spray nozzle units being arranged from front to back along the length direction of the support rod. At least two mixed jet spray nozzles () are provided in each spray nozzle unit and uniformly arranged along the circumference of the support rod in such a manner that the mixed jet spray nozzles diverge towards periphery of the support rod with the axis of the support rod as the center. The mixed jet spray nozzles of the spray nozzle units arranged from front to back are staggered from front to back in the circumferential direction of the inner wall of the to-be-descaled metal pipe, thereby forming a mixed jet spray nozzle matrix and creating an effective descaling zone capable of completely covering the circumferential surface of the inner wall of the metal pipe. The descaling device can achieve continuous, high efficient, stable and environment-friendly descaling for the inner wall surfaces of cold-state metal pipes.