| 摘要 |
PURPOSE:To prevent damage of a seal cover packing by inserting freely slidably a probe supporting bar into the seal cover provided freely attachably and detachably in the opening of a vacuum vessel, and moving upward the supporting bar so that the detaining part thereof hoists the seal cover. CONSTITUTION:A probe 2 is mounted to a supporting bar 4 and a seal cover 10 is moved downward together with the bar 4 to place the flange 13 of the cover 10 on the circumferential flange 14 in the opening 8 of a vacuum vessel 1. The flanges 13, 14 are fixed and the inside of the vessel 1 is evacuated. While the bar 4 is slid with a gland packing 9, the bar is moved downward to immerse the probe 2 in a molten metal 6. The probe is moved upward and is stopped after temp. measurement and sampling. The vacuum treatment is then released and the flanges 13, 14 are unfastened. When the bar 4 is moved upward, the detaining part 19 of the bar 4 detains the cover 10 and moves upward together with cover. The passage of the probe 2 through the gland packing 9 of the cover 10 is thus obviated and therefore the packing 9 is kept free from damage by heat. |
