Spiral fire grate

The utility model relates to a spiral fire grate. The spiral fire grate comprises a fixed shaft, six vibration plates, a baffle, five isolation plates, a combustion cylinder frame, two igniters, a slag discharging disc, four supporting shafts and two T-shaped supports. The inner walls of the six vibration plates are spirally and fixedly connected to the fixed shaft, and the inner wall of the baffle is fixedly connected with the fixed shaft; the baffle is fixedly connected with the edge of the vibration plate at the uppermost position; the five isolation plates are arranged between the six vibration plates, and the inner walls of the isolation plates are fixedly connected with the fixed shaft; the outer walls of the vibration plates, the outer wall of the baffle and the outer walls of the isolation plates are fixedly connected with the combustion cylinder frame; the two igniters are arranged on the outer wall of the combustion cylinder frame; the inner wall of a conical opening in the slag discharging disc is connected with the fixed shaft through the four supporting shafts; the outer wall of the slag discharging disc is fixedly connected with the inner wall of the combustion cylinder frame; and the two T-shaped supports are symmetrically and fixedly connected to the two sides of the combustion cylinder frame. The spiral fire grate can achieve spiral step-by-step combustion function and has the advantages of being large in combustion space, high in combustion speed, short in combustion time, high in combustion efficiency and the like.