Sealing device for solving gas leakage of plug valve during reversing of coke oven

The utility model relates to the technical field of sealing parts of coking production valve equipment, and discloses a sealing device for solving gas leakage of a plug valve during reversing of a coke oven. The sealing device comprises a sealing blank cap made of transparent materials, a valve body sealing ring and a valve element sealing ring, a plurality of installation screw holes are formed in the sealing blank cap in the radial direction, a waste oil discharging hole is formed in the edge of the sealing blank cap, an inlet of the waste oil discharging hole is located between the valve body sealing ring and the valve element sealing ring, and an outlet of the waste oil discharging hole is located between the valve body sealing ring and the valve element sealing ring. In addition, a valve body sealing groove and a valve element sealing groove are turned in the end face of the valve body and the end face of the valve element respectively and used for containing a valve body sealing ring and a valve element