Waste gas treatment machine for purifying welding waste gas

The utility model discloses a welding waste gas purification waste gas treatment machine, including equipment body and gas inlet pipe, gas inlet pipe is provided in the top of equipment body, gas inlet pipe bottom four corners are all provided with positioning groove, the inner cavity of positioning groove is provided with positioning piece, the inner cavity of positioning piece is provided with the movable groove, the movable groove is provided with the gas inlet pipe, the gas inlet pipe is provided with the gas inlet pipe. And a fixing mechanism is arranged in an inner cavity of the movable groove. Through cooperative use of the movable groove, the fixing mechanism and the control mechanism, the pull rod is pulled, the pull rod drives the control rod to move through the control block, and the control rod drives the movable plate to rotate, so that the movable plate drives the fixing block to enter an inner cavity of the movable groove while driving the limiting plate to extrude the spring through the slidin