Steam seal structure of steam turbine

The utility model discloses a steam turbine steam seal structure which comprises two arc-shaped clamping rings, one arc-shaped clamping ring is fixedly connected with an insertion plate, the other arc-shaped clamping ring is fixedly connected with a clamping plate, the clamping plate is provided with a clamping groove, the insertion plate is fixedly connected with an insertion block, the two sides of the insertion plate are fixedly connected with fixing frames, the fixing frames are connected with extrusion blocks in a sliding mode, and the extrusion blocks are connected with the clamping grooves. The blade clamping device has the advantages that when the two arc-shaped clamping rings are arranged on a blade of a steam turbine in a sleeved mode, the insertion plate and the clamping plate are folded, the insertion block is inserted into the clamping groove, the extrusion block slides, the spring ejector pin is pressed down in the process of sliding the extrusion block till the spring ejector pin is inserted in