Sealed type flexible connection device for slag cooler inlet of circulating fluidized bed boiler

The utility model relates to a sealed type flexible connection device for a slag cooler inlet of a circulating fluidized bed boiler. Rigid expansion joints are used in inlets of slag coolers special for slag discharging of circulating fluidized bed boilers at present, however, in practical application process, the rigid expansion joints are unable to be fully sealed, and smoke and slag discharging exists, therefore the surrounding environment is polluted, and negative factors are brought to equipment. The sealed type flexible connection device for the slag cooler inlet of the circulating fluidized bed boiler comprises an upper inlet flange (2) connected with a steel tube (1); an upper connecting pipe (3) is connected to the inlet flange, installed on the outer side of the steel tube in a sleeve mode, and connected with a high temperature flame retardant fabric sleeve (4); a lower connecting pipe (5) is connected with the lower portion of the high temperature flame retardant fabric sleeve; and the lower connec