Centering device for fixing ingot mould

The invention discloses a centering device for fixing an ingot mould, and relates to the technical field of smelting and casting equipment, the centering device comprises a fixing cylinder, a supporting plate, a fixing plate and at least three clamping mechanisms, the supporting plate and the fixing plate are fixedly arranged in the fixing cylinder at intervals from top to bottom; a first through hole is formed in the center of the supporting plate; all the clamping mechanisms are evenly distributed in the fixing cylinder in the circumferential direction. The clamping mechanism comprises a clamping plate and a reset mechanism; the clamping plate comprises a bearing part, a connecting part and an inclined plate part which are connected in sequence; the clamping plate penetrates through the second through hole, and the connecting part is rotationally matched with the supporting plate through a rotating shaft; the reset mechanism comprises a moving rod, a spring, a reset block and a limiting plate, the moving ro