Improved continuous casting machine fan-shaped section opening degree measuring device

The utility model discloses an improved device for measuring the opening degree of a fan-shaped section of a continuous casting machine. Lengthening rod, a support arm is fixed at the left end of theextension rod; a pair of measuring arms is hinged to the end, away from the extension rod, of the supporting arm. Wherein an included angle surface formed by the two measuring arms is perpendicular tothe supporting arm, the lengthening rod comprises a plurality of connecting rods which are sequentially connected end to end, the adjacent connecting rods are detachably connected, an inserting rod is arranged at the left end of each connecting rod, an inserting hole is formed in the right end of each connecting rod, and every two adjacent connecting rods are locked through a locking structure after being matched and inserted; a sleeve is welded and fixed to the end, away from the measuring arm, of the supporting arm and arranged outside the inserting rod in the connecting rod on the leftmostside in a sleeving mode, a