| 摘要 |
A through hole sealing device capable of sealing a through hole through which a pipe penetrates with a simple constitution even if a pressure difference is large is provided. Plural-stage gland packings (26) are arranged on the outer periphery of a pipe (21). The gland packings (26) are pressed radially inwardly by tubes (24) through compressive members (30). The tubes (24) press the gland packings (26) against the outer peripheral face of the pipe (21) by the pressure of a tightening gas supplied through a tightening gas supply port (31). The multi-stage tubes (24) and the gland packings (26) are held by ring spacers (30) and an outer tube (25). The pressing force of the gland packings (26) in sliding contact with the outer peripheral face of the pipe (21) can be regulated easily by the regulation of the pressure in the tubes (24), and a sealing performance can be improved easily with a simple constitution. <IMAGE> |
