Single-side double-steam-inlet volute of steam turbine

The invention discloses a single-side double-steam-inlet volute of a steam turbine, and relates to the technical field of steam turbines. The problems that an existing volute and transverse guide vane structure cannot be applied to a single-side double-steam-inlet module in a steam turbine, and a traditional insertion pipe steam inlet structure is large in total pressure loss and poor in flow uniformity are solved. An oval-ring-shaped volute flow channel is formed in a volute body, the section size of the volute flow channel is gradually reduced in the airflow flowing direction, and a first steam inlet pipeline and a second steam inlet pipeline which are arranged on the same side are arranged on the upper portion or the lower portion of the volute flow channel. One end of the first steam inlet pipeline and one end of the second steam inlet pipeline are converged and then communicated with the steam inlet side of the volute flow channel, the other end of the first steam inlet pipeline and the other end of the