| 摘要 |
PURPOSE:To enable precise positioning of an internal pump by mounting a flange which projects externally from a diffuser on the upper end of a supporting cylinder which is joined with a partition plate and joining the lower end part of the diffuser to the upper end of a nozzle which stands on the lower mirror of a pressure container. CONSTITUTION:The partition plate 23 of an internal pump has a supporting cylinder 32 which externally surrounds a diffuser 25. The diffuser 25 has an externally flanged projection 25a which is mounted on the upper end face of the supporting cylinder 32. The lower part 35 of the diffuser and the diffuser 25 integral therewith the joined with a nozzle 28 by the bayonetting method. When the lower mirror is deformed downwards with increase in pressure inside a pressure container, the diffuser is pulled downwards so that the diffuser can be completely fixed between the partition plate and the nozzle.
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