Purifier for machining and welding of air compressor

The invention discloses a purifier for machining and welding of an air compressor. The purifier for machining and welding of the air compressor comprises a purifying box, a purifying filter cartridge,a fan and an air manifold, wherein the purifying filter cartridge is fixed on the inner wall of the upper end of the purifying box through a hanger; the fan is mounted at the lower end of the insideof the purifying box; the air manifold is arranged on one side of the fan and one side of the purifying filter cartridge; the top surface of the purifying box is rotatably connected with an air suction arm through a connecting ring; a dust collecting cover is fixedly arranged at the lower end of the air suction arm; a fixing plate is further fixedly arranged on the top surface of the purifying box; a circle of annular sliding track is further arranged at the outer edge of the top surface of the fixing plate; the annular sliding track is slidably connected with a slider; a stand column is fixedly arranged on the slider; a U-shaped fixing seat is fixedly arranged at the upper end of the stand column; the outer side of the air suction arm is further fixedly connected with a fixing ring in a sleeving manner; and the fixing ring can be in clamped connection to the U-shaped fixing seat. The problems that if an air suction arm of an existing welding purifier is bent extensively, unsmooth ventilation is easily caused, and the using effect is affected are solved.