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32. 发明专利

JPS54149694A Seal testing method 失效
标题翻译：密封测试方法
公开(公告)号：JPS54149694A
公开(公告)日：1979-11-24
申请号：JP5784378
申请日：1978-05-16
申请人： Hitachi Cable Ltd
发明人： FUKAZAWA MASAKATA , SUGIYAMA KOUICHI , ANDOU YORIO , KANAMARU KIMIHARU , SATOU HIDEO , MINAFUJI JIYUNICHI
IPC分类号： G01M3/28 , G01M3/04 , G01M3/22 , H01B13/24
摘要： PURPOSE: To continuously accomplish the seal tests in a manner to monitor the exhaust gases at all times by scavenging the extruded or welded portion of a pipe so that He gases are continuously blown onto the outer side of the pipe immediately after the extrusion or the welding operation while guiding the exhuast gases into an He leak detector.
CONSTITUTION: A cable core 1 is guided through a sealed pipe 2 under an evacuated condition into an aluminum sheath extruder and is coated with the sheath of aluminum in the manner as shown in arrow. Immediately after this coating, He gases are blown onto the Al sheath. After cooled down with cooling water, the sheath 8 is currugated by a currugator 9 thereby to produce a corrugated sheath 10. An evacuating pump 11 is arranged immediately in front of rhe extruder 3, and an He detector 13 is arranged through an oil diffusion pump 12. The leading end of the cable having the sheath is closed so that the pipe 2 and the sheath 8 are evacuated by the pump 11. At this time, the inside of the He detecting pipe 13 is evacuated by means of the pump 12, and the He gases are sucked into the sheath 8, if there is any leak in the sheath 8, so that the leak can be detected by the pipe 13.
COPYRIGHT: (C)1979,JPO&Japio
摘要翻译：目的：通过清理管道的挤出或焊接部分，始终通过清除排气的方式不间断地进行密封试验，使得He气体在挤出或焊接后立即连续地吹到管的外侧同时将排出气体引导到He泄漏检测器中。构成：电缆芯1在真空条件下被引导通过密封管2到铝鞘挤出机中，并以如箭头所示的方式涂覆有铝护套。在这种涂层之后，He气体被吹到Al鞘上。用冷却水冷却后，护套8由卷曲器9进行波纹化，从而制成波纹状护套10.紧急挤压机3的前方配置有排气泵11，通过油扩散泵具有护套的电缆的前端被封闭，使得管子2和护套8被泵11抽空。此时，借助于泵12将He检测管13的内部抽真空，并且如果护套8中存在任何泄漏，则He气体被吸入护套8中，从而可以通过管13检测泄漏。

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