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    • 1. 发明公开
    • Arrangement for plugging poorly accessible flow holes having a chamfer
    • Anordnung zum VerschliessenschwerzugänglicherStrömungsöffnungenmit einerAbschrägung。
    • EP0280552A2
    • 1988-08-31
    • EP88301634.7
    • 1988-02-25
    • WESTINGHOUSE ELECTRIC CORPORATION
    • Popalis, Craig HamiltonHahn, Joseph James
    • G21C13/06G21C13/02
    • G21C13/06Y02E30/40Y10S220/04
    • The arrangement comprises a plug (40) and a tool (100) for installing it in a flow hole (11) having a chamfered entrance portion (37) and a non-chamfered portion (39) extending therefrom.
      The plug (40) comprises a plug body (42) includ­ing a mandrel (47) for expanding a distal portion (48) of the plug body into sealing engagement with the wall of the non-chamfered portion of the flow hole, and a retaining ring (44) disposed on and cooperating with the plug body to determine the axial position thereof within the flow hole. The retaining ring (44) is slideable on the plug body (42) within limits enabling the plug (40) to be telescopically shortened to facilitate installation thereof, and telescop­ically extended to a length assuring proper positioning of the expandable distal plug body portion within the non-chamfered portion of the flow hole to be plugged. The tool (100) comprises a relatively shallow frame (116) supporting a plug-holding cradle assembly (114) for move­ment between a retracted position and a projected plug-­inserting position, and a compact hydraulic ram (112) for driving the mandrel of the plug (40) to its plug-body expanding position.
      The arrangement is particularly suitable for use in plugging flow holes in the core barrel of nuclear reactors.
    • 该装置包括插头(40)和工具(100),用于将其安装在具有从其延伸的倒角入口部分(37)和非倒角部分(39)的流动孔(11)中。 插塞(40)包括插头体(42),插头主体(42)包括用于将插头主体的远端部分(48)膨胀成与流动孔的非倒角部分的壁密封接合的心轴(47) 环(44)设置在塞体上并与插塞体配合以确定其在流动孔内的轴向位置。 保持环(44)可在限制内在插头主体(42)上滑动,使得插头(40)可伸缩地缩短以便于其安装,并且可伸缩地延伸至一定长度,确保可扩展的远端插头主体部分在 要堵塞的流通孔的非倒角部分。 所述工具(100)包括支撑用于在缩回位置和突出插入插入位置之间移动的插头支架组件(114)的相对较浅的框架(116),以及用于驱动所述心轴的紧凑型液压压头 插头(40)到其插头体扩展位置。 该装置特别适用于堵塞核反应堆芯筒中的流动孔。