The utility model discloses a high-temperature
silicone rubber sealing ring suitable for
extreme environment, which relates to the technical field of sealing rings and comprises a sealing ring body, an
air cavity is arranged in the sealing ring body, an air inlet
pipe is fixedly connected onto the side wall of the sealing ring body, the inside of the air inlet
pipe is communicated with the
air cavity, and the air inlet
pipe is communicated with the
air cavity. The
tail end of the air inlet pipe is fixedly connected with an air inlet connector, an air inlet hole is formed in the axis of the air inlet connector, the air inlet hole is communicated with the interior of the air inlet pipe, a first sealing mechanism is arranged in the air inlet hole, and a second sealing mechanism is arranged at an opening of the air inlet hole. By means of the unique structural design, after the inflation type sealing ring is inflated, when inflation equipment needs to be disassembled, primary sealing of the air inlet hole can be completed at the moment of disassembling, and the situation that air in the sealing ring body flows out in the process that an air inlet
nozzle of the inflation equipment is drawn out is avoided.