| 摘要 |
A compression sealed airtight terminal (10) comprises the following structures: a metal outer ring (11) made of iron or iron alloy; a pipe guide line (12) penetrating the iron alloy of the metal outer ring (11); an insulation glass (13) sealing an inner wall of the metal outer ring (11) and an outer diameter of the pipe guide line (12) in an airtight manner; and a lead out guide line (14) penetrating the pipe guide line (12) and formed by low resistance metals like silver, copper, aluminum or aluminum alloy, or copper ally. An inner side of the metal outer ring (11) is provided with a regulated gap (15) used for buffering thermal expansion of the lead out guide line (14) connected with the pipe guide line (12) in an airtight manner through a connecting portion (16). |
