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    • 2. 发明申请
    • STRUCTURE FOR SUPPRESSING FLOW VIBRATION OF INSTRUMENTATION GUIDE TUBE
    • 用于抑制仪表导管流动振动的结构
    • US20100091929A1
    • 2010-04-15
    • US12527484
    • 2009-02-22
    • Nobuki UdaShigeyuki WatanabeKazuo HirotaHideyuki SakataHideyuki MoritaMakoto NakajimaChikara KurimuraToshio Ichikawa
    • Nobuki UdaShigeyuki WatanabeKazuo HirotaHideyuki SakataHideyuki MoritaMakoto NakajimaChikara KurimuraToshio Ichikawa
    • G21C17/10
    • G21C17/10G21C3/322G21C17/08
    • An upper hole 37A and a lower hole 37B are provided at two positions, namely, upper and lower portions, of a side surface of a guide tube 27, and a thimble tube 22 is pressed against an inner circumferential surface of the guide tube 27, by a differential pressure between coolant inside and outside the upper hole 37A and the lower hole 37B. It is preferable that an upper pressure adjustment hole and a lower pressure adjustment hole are provided at two positions, namely, upper and lower portions, of a side surface of an upper core support column 21, and a coolant flowing into the guide tube from an upper end of the guide tube flows out to the outside from inside the guide tube through a gap between the thimble tube and the upper hole, and also flows out to the outside from inside the upper core support column through the upper pressure adjustment hole, and a coolant flowing into the guide tube from a lower end of the guide tube flows out to the outside from inside the guide tube through a gap between the thimble tube and the lower hole, and also flows out to the outside from inside the upper core support column through the lower pressure adjustment hole.
    • 在引导管27的侧面的两个位置,即上下部分设置有上孔37A和下孔37B,并且将套管22压靠在引导管27的内周面上, 通过上部孔37A和下部孔37B的内部和外部的冷却剂之间的压力差。 优选的是,上压力调节孔和下压力调节孔设置在上芯支撑柱21的侧表面的两个位置,即上部和下部,以及从上部芯支撑柱21的侧表面流入导管的冷却剂 引导管的上端通过引导管和上孔之间的间隙从导管的内部流出到外部,并且还通过上压力调节孔从上芯支撑柱的内部流出到外部,并且 从引导管的下端流入引导管的冷却剂通过引导管和下孔之间的间隙从引导管的内部流出到外部,并且还从上部芯支撑体内部流出到外部 柱通过下压力调节孔。