Cement brushing operation equipment for inner wall of large-size cast iron pipe fitting

The utility model relates to a large-size cast iron pipe fitting inner wall cement brushing operation device which is provided with a supporting frame, the upper end of the supporting frame is provided with a hollow guniting rod, one end of the guniting rod is connected with a guniting nozzle through a threaded connector A, the guniting nozzle and the guniting rod are perpendicular to each other, and a switch valve is arranged on the guniting rod. The end part of the other end of the guniting rod is connected with a slurry conveying pipe through a screwed joint B, the slurry conveying pipe is connected with a cement slurry pump, and the inlet end of the cement slurry pump is connected to a cement slurry pool; according to the utility model, a tool for spraying cement paste with a brand new structure is independently designed, and the traditional operation of brushing the cement paste on the inner wall of a cast iron pipe workpiece by using a hair brush is replaced, so that the labor intensity of operators is