Ultra-long thin-walled large diameter moisture separator reheater barrel body distortion preventing device

The utility model relates to an ultra-long thin-walled large diameter moisture separator reheater barrel distortion preventing device which comprises a barrel body interior circle supporting member and a barrel body exterior ring distortion preventing member, wherein the barrel body interior circle supporting member comprises a support frame (1), one end of an adjusting screw rod (2) is connected to the support frame (1) through threads, and the other end of the adjusting screw rod (2) is connected with an arc plate component (3); and the barrel body exterior ring distortion preventing member comprises annular plates (20) and tiepiece plates (21) arranged on the annular plates (20). The barrel body interior circle supporting member is multipoint adjustable support method, and can adjust inner diameters of part support points by means of the adjustment of telescopic length of the adjusting screw rod and a support pipe so as to guarantee ovality of a barrel body. The barrel body exterior ring distortion prevent