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公开(公告)号：US4829660A
公开(公告)日：1989-05-16
申请号：US50799
申请日：1987-05-18
申请人： James W. Everett , John B. Gunter , William Woolfolk , Frank Sadofsky , Lawrence A. Nelson , George D. Fulmer , George G. Elder , Robert F. Keating
发明人： James W. Everett , John B. Gunter , William Woolfolk , Frank Sadofsky , Lawrence A. Nelson , George D. Fulmer , George G. Elder , Robert F. Keating
CPC分类号： B23P19/025 , Y10T29/49352 , Y10T29/49387 , Y10T29/49721 , Y10T29/49821 , Y10T29/49824 , Y10T29/531 , Y10T29/53122
摘要： An improved system for removing a plug from the open end of a heat exchanger tube in a nuclear steam generator is disclosed herein. It is particularly adapted for removing a plug formed from an elongated, cylindrical shell of Inconel.RTM. having a closed end, an open ends, and an expander element that radially expands the shell when axially drawn from the clossed to the open end of the shell. The system comprises an expander remover for axially pushing the expander element from the open end completely through the closed end of the plug shell, and a TIG torch for creating beads along the longitudinal axis of the plug shell which relax the engagement between the plug shell and the tube after the weld beams harden. Finally, the system includes a plug puller for pulling the loosened plug from the tube. The expander remover and plug puller maybe remotely operated by means of a robotic arm, and a compliance coupling is provided to facilitate alignment between these tools and the plugged end of a selected heat exchanger tube.
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公开(公告)号：US5255717A
公开(公告)日：1993-10-26
申请号：US584369
申请日：1990-09-18
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。
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3.发明授权Method for controlling leakage through degraded heat exchanger tubes in the tubesheet region of a nuclear generator 失效用于通过核发电机的管板区域中的劣化的热交换器管来控制泄漏的方法
公开(公告)号：US5027507A
公开(公告)日：1991-07-02
申请号：US317706
申请日：1989-03-01
CPC分类号： F22B37/421 , B21D39/06 , F16L55/162 , F28F11/00 , G21C17/00 , Y10T29/49352 , Y10T29/49375 , Y10T29/49718 , Y10T29/49748 , Y10T29/49776 , Y10T29/4994
摘要： A method of controlling leakage through degraded heat exchanger tubes in the tubesheet region of a nuclear steam generator is disclosed herein. The method comprises radially expanding a section of the heat exchanger tube disposed within the bore of the tubesheet into leak resistant engagement so that the resultant leakage flow is equal to or less than an acceptable leakage flow rate. The expanded, leak resistant section is located above the degraded section of the heat exchanger tube and below the upper side of the tubesheet. The length L of the leak resistant section and the pressure P necessary to create it are determined by ascertaining a plurality of combinations of length Lx and pressure Px that would result in a sufficiently tight engagement between the heat exchanger tube and the tubesheet bore to achieve the desired leakage flow rate, and by choosing a combination of Lx, Px that results in the smallest length L without exceeding a pressure of 50 ksi (344.7 MPa).
摘要翻译： 本文公开了一种通过核蒸汽发生器的管板区域中的劣化的热交换器管来控制泄漏的方法。 该方法包括将设置在管板孔内的热交换器管的一部分径向膨胀成防漏接合，使得所产生的泄漏流量等于或小于可接受的泄漏流量。 膨胀的防漏部分位于热交换器管的退化部分的上方，并位于管板的上侧。 通过确定长度Lx和压力Px的多个组合来确定防漏部分的长度L和产生它所需的压力P，这将导致热交换器管和管板孔之间的足够紧密的接合，以实现 期望的泄漏流量，并且通过选择导致最小长度L而不超过50ksi（344.7MPa）的压力的Lx，Px的组合。
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公开(公告)号：US4765374A
公开(公告)日：1988-08-23
申请号：US110806
申请日：1987-10-21
IPC分类号： F16L55/136 , F28F11/02 , F16L55/12
CPC分类号： F28F11/02 , F16L55/136
摘要： The multi-seal tube plug comprises a substantially cylindrical sheath closed at one end and having a central cavity. An expander is received within the central cavity of the sheath and acts to expand the sheath into contact with the tube. The expander comprises a plurality of radially expandable disks having a central aperture and an expander member adapted to be received within the aperture and to expand the disks. The expanded disks expand a portion of the sheath into contact with the tube to sealingly engage the tube. The expander member is preferably conical and interacts with the conical inner surfaces of the disks. An alternate embodiment of the multi-seal tube plug uses conical washers rather than radially expandable flat disks. All embodiments of the multi-seal tube plug are easily removable and do not damage the tube.
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公开(公告)号：US4771810A
公开(公告)日：1988-09-20
申请号：US868225
申请日：1986-05-28
IPC分类号： F16L55/136 , F22B37/02 , F28F11/02 , F16L55/00
CPC分类号： F16L55/136 , F28F11/02
摘要： The multi-seal tube plug comprises a substantially cylindrical sheath closed at one end and having a central cavity. An expander is received within the central cavity of the sheath and acts to expand the sheath into contact with the tube. The expander comprises a plurality of radially expandable disks having a central aperture and an expander member adapted to be received within the aperture and to expand the disks. The expanded disks expand a portion of the sheath into contact with the tube to sealingly engage the tube. The expander member is preferably conical and interacts with the conical inner surfaces of the disks. An alternate embodiment of the multi-seal tube plug uses conical washers rather than radially expandable flat disks. All embodiments of the multi-seal tube plug are easily removable and do not damage the tube.
摘要翻译： 多密封管塞包括在一端封闭并具有中心腔的基本上圆柱形的护套。 扩张器被容纳在护套的中心腔内并用于使护套膨胀以与管接触。 膨胀器包括多个径向可扩张的盘，其具有中心孔和适于容纳在孔内并扩张盘的膨胀器构件。 扩张的盘将护套的一部分扩展成与管接触以密封地接合管。 膨胀器构件优选地是圆锥形的并且与圆盘的圆锥形内表面相互作用。 多密封管塞的替代实施例使用圆锥形垫圈而不是可径向扩张的平盘。 多密封管塞的所有实施例都容易拆卸并且不会损坏管。
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公开(公告)号：US4751944A
公开(公告)日：1988-06-21
申请号：US868226
申请日：1986-05-28
摘要： The tube plug comprises a substantially cylindrical sheath closed at one end and having a relatively smooth outer surface and a central cavity. An expandable shell is received within the central cavity of the sheath. An expander member is adapted to expand the shell from within by being axially translated within the shell, the expander member also being adapted to grip the inner surface of the shell to retain the expander member in the expanded position. The outside surface of the shell is preferably provided with a plurality of lands. A second embodiment of the tube plug comprises a sleeve, a closed shell member adapted to be inserted within the sleeve, and an expander member contained within the shell. Upon axial translation of the expander member within the shell, the shell is expanded into contact with the sleeve and the sleeve is expanded into contact with the tube, thereby sealing the tube.
摘要翻译： 管塞包括在一端封闭并具有相对光滑的外表面和中心腔的基本上圆柱形的护套。 可扩张的壳容纳在护套的中心腔内。 膨胀器构件适于通过在壳体内轴向平移从内部膨胀壳体，膨胀器构件还适于夹紧壳体的内表面以将膨胀器构件保持在展开位置。 壳体的外表面优选设置有多个平台。 管塞的第二实施例包括套筒，适于插入套筒内的封闭壳体构件和容纳在壳体内的膨胀器构件。 当膨胀器构件在壳体内轴向平移时，壳体膨胀成与套筒接触，并且套管膨胀成与管接触，从而密封管子。
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7.发明授权Method for sealing a bare hole defined by a nuclear heat exchanger tubesheet 失效用于密封由核热交换器管板限定的裸露孔的方法
公开(公告)号：US5715598A
公开(公告)日：1998-02-10
申请号：US572221
申请日：1995-12-13
CPC分类号： F28F11/02 , Y10T29/4935 , Y10T29/49352 , Y10T29/4994 , Y10T29/531
摘要： Method and joint for sealing a bare hole in a nuclear heat exchanger tubesheet. The tubesheet has a plurality of holes formed therethrough, wherein at least one of the holes has been left vacant by a heat transfer tube removed from the hole. Such a hole is defined as a bare hole. One embodiment of the method of the invention comprises disposing a sleeve in the bare hole to protect the tubesheet material from the corrosive attack of the heat exchanger primary coolant and sealingly disposing a sleeve plug in the sleeve in order to seal the sleeve. A leak-tight joint is defined as the sleeve plug is sealingly disposed in the sleeve.
摘要翻译： 用于密封核热交换器管板中裸露孔的方法和接头。 管板具有穿过其中形成的多个孔，其中至少一个孔已被从孔中移出的传热管留空。 这样的孔被定义为裸露的孔。 本发明方法的一个实施例包括将套管设置在裸露孔中以保护管板材料免受热交换器初级冷却剂的腐蚀侵袭，并将套筒塞密封地设置在套筒中以便密封套筒。 密封接头被定义为套筒密封地设置在套筒中。
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