Special angle gauge for manufacturing pipeline elbow

The utility model belongs to the technical field of measuring tools for delivery pipe maintenance, is particularly relates to a special angle gauge for manufacturing a pipeline elbow, and is characterized by consisting of a left support rod, a right support rod, a pipe diameter measuring device which is respectively and slidably connected with the left and the right support rods, a pointer fixed on a rotating shaft and an angle index disc fixed on the left end of the left support rod, wherein the circle center of the angle index disc is arranged at the circle center of the rotating shaft, and a limit pin is respectively arranged at both the left end of the left support rod and the right end of the right support rod. Length scales are arranged on both the left and the right support rods. The pipe diameter measuring device consists of a sleeve, three screws and a movable claw, and radial length scales are arranged on the screws. The movable claw consists of an adjustable nut, a connection sleeve and a jack catc