Pilot-operated type flue gas switching valve

The invention relates to a pilot-operated type flue gas switching valve, and belongs to the technical field of sintering process flue gas system auxiliary equipment. According to the technical scheme, a guide hopper (17) and a valve plate (15) which are arranged up and down are arranged in a valve body (14); the air cylinder (4) is fixed to the valve body (14), a piston rod (6) of the air cylinder (4) is rotationally connected with one end of the connecting short shaft (7), the other end of the connecting short shaft (7) is rotationally connected with the crank (8), the upper end of the crank (8) is connected with the valve plate shaft (16), the valve plate (15) is fixed to the valve plate shaft (16), and the two ends of the valve plate shaft (16) are rotationally connected to the valve body (14). The upper end of the pilot pipe (11) is communicated with a guide hopper (17) on the upper portion of the valve plate (15), the lower end of the pilot pipe (11) is communicated with a valve body (14) on the lower po