Pipe orifice mounting gap measuring device of concrete pipeline

A device for measuring the mounting clearance of the orifice of a concrete pipe for a pipe docking process simplified as docking of a downstream pipe, which has been fixed to another pipe and is located downstream of the flow of fluid, and an upstream pipe, which is lifted by a crane with the spigot facing the bell mouth of the downstream pipe, the device comprising a detection unit for detecting the mounting clearance of the orifice of the concrete pipe, the detection unit being configured to detect the mounting clearance of the orifice of the concrete pipe. The two ends of the detection unit are connected to a downstream axis point and an upstream axis point which penetrate through the axis of the downstream pipe and the axis of the upstream pipe respectively, and the detection unit is of an elastic structure and provided with a detection assembly. The detection assembly is configured to be a structure capable of detecting the offset of the two ends of the detection unit on the longitudinal plane due to the