Detection device for bilateral intersecting opening of large-pipe-diameter pipe

The utility model discloses a detection device for a bilateral intersecting opening of a large-diameter pipe, which belongs to the technical field of pipe intersecting opening detection devices and comprises a reference fixing piece, a leveling instrument and an error scale piece. The reference fixing piece comprises a positioning column; the error scale member comprises a graduated scale; during measurement, any end of the leveling instrument is sleeved with the reference fixing piece through the positioning column, and the graduated scale abuts against the outer surface of the leveling instrument in the length direction. After one end of the horizontal ruler is fixed to the reference fixing piece, the horizontal ruler is adjusted to be in a horizontal state, numerical values can be read on the error ruler, and after the operation is conducted at the two ends of the pipe in sequence, it can be determined that the machined intersecting line meets the design requirement when the results of the two numerical va