Dirt cleaning structure for steam turbine blade

The invention discloses a steam turbine blade dirt cleaning structure, and mainly relates to the field of steam turbine cleaning. Comprising a circulating pool and a plurality of liquid inlet holes formed in the side wall of a steam turbine shell, the liquid inlet holes correspond to blades in position, a groove is formed in the inner side wall of the steam turbine shell, a nozzle is rotationally connected into the groove, spraying holes communicated with the liquid inlet holes are formed in the nozzle, and a torsional spring is arranged between the nozzle and the inner side wall of the groove. A groove is formed in the circulating pool, a sealing plate for driving the nozzle to rotate is slidably connected into the groove, the groove is sealed after the sealing plate slides, the circulating pool is provided with a liquid inlet pipe and a liquid outlet pipe, a liquid inlet pump is arranged on the liquid inlet pipe, an inclined filter plate is arranged below the liquid outlet pipe, a dirt pool is arranged on o