A magnesium alloy melting furnace bricklaying radian calibrator

The utility model provides a magnesium alloy melting furnace bricklaying radian calibrator, and belongs to the field of calibration equipment. The magnesium alloy melting furnace bricklaying radian calibrator of the utility model solves of problems of low calibration precision, inconvenient operation and impossibility of guaranteeing concentricity in the prior art. The radian calibrator comprises a pedestal, a longitudinal rod fixed on the pedestal, a connecting piece and cross bars fixed on the longitudinal rod through the connecting piece. The cross bars are sleeve pipes connected to the connecting piece. The sleeve pipes include inner pipes and outer pipes. The both end portions of the inner pipes are provided with arc members. Arcs of the two arc members are in circles which regard central points of the arc members as centers of the circles and the cross bars as diameters. The magnesium alloy melting furnace bricklaying radian calibrator of the utility model is high in calibration precision; the lengths o