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    System for removing a plug from a heat exchanger tube
    1.
    发明授权
    System for removing a plug from a heat exchanger tube 失效
    从热交换器管中取出塞子的系统

    公开(公告)号：US5255717A

    公开(公告)日：1993-10-26

    申请号：US584369

    申请日：1990-09-18

    申请人： Lawrence A. Nelson ,  George D. Fulmer ,  George G. Elder ,  Robert F. Keating

    发明人： Lawrence A. Nelson ,  George D. Fulmer ,  George G. Elder ,  Robert F. Keating

    IPC分类号： B23P19/02 ,  F16L55/10

    CPC分类号： B23P19/025 ,  Y10T29/49352

    摘要： An improved, easily removable plug for plugging the open end of a heat exchanger tube in a nuclear steam generator is disclosed herein. The plug generally comprises a cylindrical shell of Inconel.RTM. having tapered side walls, a closed end, an open end, a cork-shaped expander element disposed within the shell that radially expands the tapered side walls of the shell into sealing engagement with the inner walls of a tube when axially drawn from the closed to the open end of the shell, and a wall section in the interior of the shell between the closed end and the tapered side walls for receiving the expander element when this element is pushed back from the open end of the shell back against the closed end thereof, thereby affording clear mechanical access to the interior of the tapered side walls of the shell. The improved plug is particularly adapted for use with a plug removal system that includes an expander remover that axially pushes the expander element backward against the closed end of the shell, a TIG torch for creating axially oriented weld beads within the interior of the tapered side walls of the shell in order to contract these side walls and to relax the engagement between the plug and the heat exchanger tube, and a plug puller that pulls the plug from the tube.

    摘要翻译： 本文公开了一种用于堵塞核蒸汽发生器中的热交换器管的开口端的改进的，易于移除的插塞。 插头通常包括Inconel TM的圆柱形外壳，其具有渐缩侧壁，闭合端，开口端，设置在壳体内的软木形膨胀器元件，其使壳体的锥形侧壁径向膨胀成与内壁密封接合 当从封闭的壳体的开口端轴向地拉出时，管的内壁上的壁部分在闭合端和锥形侧壁之间，用于当该元件从开口部被推回时接收膨胀元件 壳体的端部抵靠其封闭端部，从而提供对壳体的锥形侧壁的内部的清楚的机械通路。 改进的塞子特别适于与塞子移除系统一起使用，该塞子移除系统包括一个膨胀器去除器，其将膨胀器元件向后推靠在壳体的封闭端部，TIG手电筒用于在锥形侧壁的内部产生轴向取向的焊接珠 以便收缩这些侧壁并且松弛插头和热交换器管之间的接合，以及将插头从管拉出的插头拔出器。

    Process for heat treating a heat exchanger tube surrounded by a support plate
    3.
    发明授权
    Process for heat treating a heat exchanger tube surrounded by a support plate 失效
    用于热处理由支撑板包围的热交换器管的方法

    公开(公告)号：US4816089A

    公开(公告)日：1989-03-28

    申请号：US69721

    申请日：1987-06-06

    申请人： Wenche W. Cheng ,  George G. Elder

    发明人： Wenche W. Cheng ,  George G. Elder

    IPC分类号： C22F1/18 ,  C21D1/30 ,  C21D9/08 ,  C22F1/00 ,  F28F9/013 ,  C21D9/14 ,  B23K1/04

    CPC分类号： C21D9/08 ,  C21D1/30

    摘要： A process for rapidly and uniformaly heat treating an Inconel.RTM. heat exchanger tube in the vicinity of a heat sink such as a support plate is disclosed herein. The process utilizes a radiant heater assembly capable of directing heat along a zone whose length is less than the length of the section of tubing to be stress relieved, and generally comprises the step of actuating the heater assembly, and oscillating it between the ends of the tube section in order to heat the tube section having nonhomogeneous thermal conductivity to a temperature that is substantially uniform along its length. The specific timing pattern used in the oscillatory movement of the heater assembly results in a substantially uniform heat gradient along the tube axis despite conductive heat losses through the support plate. The process allows heat exchanger tubes to be readily and reliably stress-relieved in the vicinity of the support plates of a nuclear steam generator.