High-temperature valve sealing device

The high-temperature valve sealing device comprises a valve plate, a valve body and a valve rod, the valve body is provided with a flow cavity, the valve rod penetrates through the valve body and the flow cavity in the radial direction of the flow cavity, the valve plate is arranged on the valve rod and located in the flow cavity, a sealing ring is arranged on the peripheral side of the valve rod in a sleeved mode and attached to the outer portion of the valve body, and the sealing ring is connected with the valve body. Sealing end covers are arranged at the two ends, penetrated by the valve rod, of the valve body, sealing cavities are formed in the sealing end covers, sealing rings are completely contained in the sealing cavities, air inlet devices are connected to the sealing end covers and communicated with the sealing cavities, and compression springs for compressing the sealing rings are arranged in the sealing cavities in the axis direction of the valve rod. According to the utility model, the situation