External rust removal equipment for chemical conveying pipe

The utility model discloses external derusting equipment for a chemical material conveying pipe, which relates to the technical field of chemical engineering and comprises a box body, a fixing mechanism is arranged on one side of the inner wall of the box body and comprises a threaded rod, the outer circumferential surface of one end of the threaded rod is in threaded connection with the inner circumferential surface of a threaded sleeve, and a base is fixedly arranged on one side of the outer circumferential surface of the threaded sleeve. One end of the base is rotationally connected with one end of the linkage rod through a pin shaft, and the other end of the linkage rod is rotationally connected with one end of the supporting sleeve through a pin shaft. A threaded rod can be controlled to rotate through external force, the threaded rod drives a threaded sleeve to move oppositely or reversely, a driven rod is further driven to stretch out and draw back in a hole in one side of the outer circumferential fac