Ash bucket lifting stroke positioning device for intermediate frequency furnace slag cleaning

The utility model discloses an ash bucket lifting stroke positioning device for cleaning furnace slag of an intermediate frequency furnace. The ash bucket lifting stroke positioning device comprises an ash bucket lifting platform and a roller chain, a synchronous lifting block is fixed on the roller chain and is fixed with the ash bucket lifting platform; upper and lower chain wheels are arranged at the upper and lower ends of the roller chain; the sprocket driving device is in driving connection with the upper sprocket or the lower sprocket; one section, far away from the ash bucket lifting platform, of the roller chain (25) is fixedly provided with a stroke identification block; an upper stroke limiting unit and a lower stroke limiting unit are arranged at the upper position and the lower position of the side, provided with the stroke recognition block, of the roller chain correspondingly. When the stroke recognition block moves up and down to touch the upper stroke limiting unit and the lower stroke limiti