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    • 5. 发明专利
    • Jet pump diffuser instrumentation piping
    • 喷油泵差速器仪表管
    • JP2010085140A
    • 2010-04-15
    • JP2008252134
    • 2008-09-30
    • Hitachi-Ge Nuclear Energy Ltd日立Geニュークリア・エナジー株式会社
    • KOIDE YUICHIKASHIWAKURA JUNMORINAKA TADASHIEBINA MASASHI
    • G21C15/25G21C15/243
    • Y02E30/31
    • PROBLEM TO BE SOLVED: To provide jet pump diffuser instrumentation piping of a BWR plant capable of allowing a natural frequency to disagree with a predominant frequency of vibration generated in the BWR plant such as operation vibration of a plant equipment or vibration of a working machine under construction to achieve non-resonance, and reducing a stress generated during vibration.
      SOLUTION: This instrumentation piping 14 is formed by providing a vibration reducing device 30 comprising a weight part 40 and a mounting mechanism 50 between supports. Hereby, even when vibration generated in the BWR plant such as operation vibration of a plant apparatus or vibration of a working machine under construction agrees with a natural frequency of instrumentation piping 19 having no vibration reducing device 30 mounted thereon, to thereby generate a resonance phenomenon, the natural frequency of the instrumentation piping 14 is lowered by an inertial effect caused by the mass of the weight part 40 of the vibration reducing device 30 mounted between the supports, and the natural frequency of the instrumentation piping 14 is deviated from a predominant frequency band of the vibration generated in the plant, to thereby avoid the resonance phenomenon and reduce a vibration response.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供BWR设备的喷气泵扩散器仪表管道,其能够允许固有频率不同于BWR设备中产生的主要振动频率,例如设备设备的操作振动或振动 正在施工的工作机械实现非共振,并减少振动期间产生的应力。 解决方案:这种仪表管道14是通过在支撑件之间设置一个包括重量部件40和安装机构50的减振装置30来形成的。 因此,即使在BWR工厂中产生的振动,如工厂设备的操作振动或正在施工的工作机械的振动,也与安装在其上没有减振装置30的仪表管道19的固有频率一致,从而产生共振现象 仪表管道14的固有频率由安装在支撑件之间的减振装置30的重量部40的质量引起的惯性效应降低,并且仪表管道14的固有频率偏离主要频率 在工厂中产生的振动带,从而避免共振现象并减少振动响应。 版权所有(C)2010,JPO&INPIT