Multi-pipe diameter nozzle size measurement auxiliary tool

The invention belongs to the technical field of pipeline measurement, and particularly relates to a multi-pipe diameter nozzle size measurement auxiliary tool, so as to solve the problems of low measurement efficiency and low measurement precision when the nozzle position of the pipeline is measured in the prior art. The measurement auxiliary tool comprises a main body, a first roller and a secondroller, wherein the first roller and the second roller are located at two ends of the main body respectively; and a prismosphere is connected with the first roller. According to the multi-pipe diameter nozzle size measurement auxiliary tool, the prismosphere can be mounted and fixed, the placement stability of the prismosphere at the nozzle position can be realized, and the measurement precisionis ensured; and besides, through rotating the main body, placement of the prismosphere at different positions of the nozzle can be realized, requirements on multiple placement positions of the prismosphere during a measurement