Secondary vulcanization equipment for tire with annular groove and without using enveloping sleeve

The utility model relates to secondary vulcanization equipment of a tire without using an enveloping sleeve and with an annular groove, which is used for the tire in which two side edges of a tire body respectively extend outwards to form a convex shoulder, the annular groove corresponding to an annular tread is formed in the convex shoulder, and buffer rubber is positioned at the bottom of the groove, and comprises a heating and pressurizing device and a buffer rubber sealing device, the buffer rubber sealing device is an annular hooping body tightly attached to the top of a gap between the inner wall of the groove and the annular tread, or a Y-shaped annular lip sealing strip embedded into the gap, or an annular lip arranged on the side face of the annular tread. The heating and pressurizing device comprises a vulcanizing tank and/or an annular hooping body with a heating device. According to the utility model, accessories such as enveloping sleeves do not need to be assembled, so that the equipment investm