High-back-pressure turbine end vapor seal capable of being rapidly detached

The invention provides a high-back-pressure turbine end vapor seal capable of being rapidly detached, and relates to the energy and power industry. An adjustment gasket A is arranged between a vapor seal main body A and a cylinder lower half part. An adjustment gasket A is arranged between the vapor seal main body A and a cylinder upper half part. The cylinder upper half part is connected with an axle sealing cover through hexagonal socket screws. An adjustment gasket B is arranged between the axial sealing cover and a cylinder seal main body B. The left side of the cylinder seal main body B is connected with one end of an anti-rotating pin A, and the other end of the anti-rotating pin A makes contact with the vapor seal main body A. The right side of the cylinder seal main body B is connected with one end of an anti-rotating pin B, and the other end of the anti-rotating pin B makes contact with a cylinder seal main body C. When the end vapor seal of a unit is replaced, bolts, the pins and other fastening pie