150MW ultrahigh pressure steam extraction and condensing type turbine

The invention relates to a turbine, in particular to a 150MW ultrahigh pressure steam extraction and condensing type turbine, and aims to solve the problems that steam is extracted from a steam extraction pipeline connection pipe of a 150MW turbine unit and the extraction flow of steam cannot be controlled so that energy loss is caused, and the turbine unit efficiency is reduced. The turbine comprises a front bearing box, an ultrahigh pressure and high-intermediate pressure combined cylinder, a middle bearing box, an ultrahigh pressure and low pressure cylinder, a rear bearing box, a rotary baffle, a rotary mechanism and a power mechanism; the ultrahigh pressure and high-intermediate pressure combined cylinder is connected between the front bearing box and the middle bearing box, and the ultrahigh pressure and low pressure cylinder is connected between the middle bearing box and the rear bearing box; the rotary baffle is mounted in the ultrahigh pressure and high-intermediate pressure combined cylinder and comprises a plate body outer ring, a plate body inner ring, a rotary ring, a cover ring, an elastic sealing ring, a connection convex handle and a stationary blade; the rotary ring is arranged between the cover ring and the plate body outer ring, and the cover ring is connected with the plate body outer ring. The 150MW ultrahigh pressure steam extraction and condensing type turbine is used for heating power generation of combined heat and power generation.