Supporting block for welding large circular pipe

The utility model discloses a supporting block for welding a large circular tube, which comprises a translation plate, the left side of the top of the translation plate is fixedly connected with a frame, the two sides of the frame are respectively provided with a fixing unit, each fixing unit comprises an electric push rod, the bottom of the translation plate is provided with a translation unit, and each translation unit comprises two transverse plates. By arranging the fixing unit, the effect of fixing the large circular pipe is achieved, the output end of the electric push rod drives the linkage rod and the arc-shaped plates to move, the two arc-shaped plates can fix and support the large circular pipe, and by arranging the translation unit, the effect of driving the fixing unit to move horizontally is achieved. The problems that a welded pipe needs to be supported and fixed in the large circular pipe welding process, but a traditional supporting device is single in function, cannot well fix the pipe and ca