Sealing device and rubber hose continuous vulcanizing device provided with same, and sealing method and rubber hose continuous vulcanizing method provided with same

A sealing device which is disposed at each of an entrance and an exit of a rubber hose continuous vulcanizing device configured to continuously vulcanize a rubber hose including one or more rubber layers by causing the rubber hose to pass through the inside of a vulcanization pipe filled with steam, the sealing device comprising:

• a pipe which has one end connected to the vulcanizing pipe, pressurized liquid being pumped into the pipe from an inlet disposed at a side face on the other end side;
• an annular member which is attached to the pipe so as to close an opening on the other end side of the pipe, and has a hole whose diameter is larger than the outer diameter of the rubber hose and through which the rubber hose passes;
• and
• a pump which is configured to pump more liquid into the inlet than the liquid discharged outside of the pipe through the gap between the hole and the rubber hose.