Concentric centering correction device and low-temperature equipment

The concentric centering correction device is used for being arranged on an outer-layer tail pipe and an inner-layer tail pipe which are arranged in a sleeved mode, the concentric centering correction device comprises a lower centering plate, the lower centering plate is coaxially arranged on the inner-layer tail pipe, a plurality of limiting protruding ends are arranged on the lower centering plate, and the limiting protruding ends are arranged on the lower centering plate; the multiple limiting protruding ends are arranged at intervals around the middle axis of the lower centering plate and protrude out of the outer circle of the inner-layer tail pipe in the radial direction. The central tip cone is used for being arranged at the bottom of the inner-layer tail pipe and extends outwards by a preset length in the axial direction; the center cone seat is used for being arranged on the inner bottom face of the outer layer tail pipe and used for being in butt joint with the center tip cone. The long and thin tai