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公开(公告)号：US5517740A
公开(公告)日：1996-05-21
申请号：US203632
申请日：1994-02-28
CPC分类号： B25B27/026 , B23P19/025 , B25B27/064 , F28F11/02 , Y10T29/53839
摘要： A tool for removing a metal plug from a tube with repeated pulling impulses includes a pneumatic cylinder defining an interior, cylindrical chamber. A distal end surface of the cylinder defines an anvil. A cylindrical slug, or hammer, is sealingly slidable within the chamber in response to a pressure difference above and below the hammer within the chamber. The cylinder is rigidly connected to the plug so as to hang therefrom, the weight of the cylinder providing a static pull force working in conjunction with the pulling impulses. A pulling impulse is provided by first raising the hammer above the anvil by pneumatically creating a first pressure difference wherein the pressure below the hammer is greater than the pressure above the hammer, then creating a second pressure difference wherein the pressure below the hammer is no greater than the pressure above the hammer in order to drive the hammer against the anvil at speed. The tool is also adapted for disengaging an expander member engaged in a tapered plug shell with a mandrel that includes a push-rod having an end extending into the top of the chamber proximate the plug. Repeated displacement impulses are applied to the expander member by applying a different sequence of forces to the hammer so as to cause it to repeatedly strike the push-rod against the expander member. The tool and a method of using the tool are particularly suited to removing a plug from a heat exchanger tube in a nuclear powered steam generator.
摘要翻译： 用于通过反复拉动冲击从管中移除金属塞的工具包括限定内部圆柱形腔室的气动缸。 圆筒的远端表面限定砧座。 响应于腔内的锤上方和下方的压力差，圆柱形塞子或锤子可在腔室内密封地滑动。 气缸刚性地连接到插头以便从其中悬挂，气缸的重量提供与拉动冲动一起工作的静态拉力。 提供拉动冲击，首先通过气动产生第一压差而将锤子提升到砧座上方，其中锤下方的压力大于锤子上方的压力，然后产生第二压力差，其中锤下方的压力不大 比锤子上方的压力高，以便以高速驱动锤子抵靠砧座。 该工具还适于使接合在锥形塞壳中的膨胀器构件与包括推杆的心轴分离，所述推杆具有延伸到靠近塞子的腔室顶部的端部。 通过向锤子施加不同的力，将重复的位移脉冲施加到膨胀器构件，以使其反复地将推杆撞击膨胀器构件。 该工具和使用该工具的方法特别适用于从核动力蒸汽发生器中的热交换器管中移除塞子。
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公开(公告)号：US5465483A
公开(公告)日：1995-11-14
申请号：US203631
申请日：1994-02-28
CPC分类号： F28F11/02 , B23P19/025 , B25B27/026 , B25B27/064 , Y10T29/49352 , Y10T29/49721 , Y10T29/49824 , Y10T29/53122
摘要： A method of removing a metal plug from a conduit includes the steps of simultaneously applying a static pull force and repetitive impulses to the plug. The method is particularly suited to removing a plug from a heat exchanger tube in a nuclear powered steam generator. A tool for practicing the method on such plugs includes a first hydraulic actuator for first moving an expansion member out of engagement with an interior plug wall, a second hydraulic actuator capable of attachment to the plug for applying a static pull force to the plug, and an arrangement connecting an air impact tool to the second hydraulic actuator for applying, simultaneously with the static force, high-frequency impulses to the plug entirely through solid members.
摘要翻译： 从导管中去除金属塞的方法包括同时对插头施加静态拉力和重复脉冲的步骤。 该方法特别适用于从核动力蒸汽发生器中的热交换器管中去除塞子。 用于在这种插头上实施该方法的工具包括：第一液压致动器，用于首先使膨胀构件与内部插塞壁脱离接合;第二液压致动器，其能够附接到插头以向插塞施加静态拉力;以及 将空气冲击工具连接到第二液压致动器的装置，其与静力同时施加完全通过固体构件的插塞的高频脉冲。
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公开(公告)号：US5664328A
公开(公告)日：1997-09-09
申请号：US387656
申请日：1995-02-13
CPC分类号： F28F11/02 , B23P19/025 , B25B27/026 , B25B27/064 , Y10T29/49352 , Y10T29/49721 , Y10T29/49824 , Y10T29/53122
摘要： A method of removing a metal plug from a conduit includes the steps of simultaneously applying a static pull force and repetitive impulses to the plug. The method is particularly suited to removing a plug from a heat exchanger tube in a nuclear powered steam generator. A tool for practicing the method on such plugs includes a first hydraulic actuator for first moving an expansion member out of engagement with an interior plug wall, a second hydraulic actuator capable of attachment to the plug for applying a static pull force to the plug, and an arrangement connecting an air impact tool to the second hydraulic actuator for applying, simultaneously with the static force, high-frequency impulses to the plug entirely through solid members.
摘要翻译： 从导管中去除金属塞的方法包括同时对插头施加静态拉力和重复脉冲的步骤。 该方法特别适用于从核动力蒸汽发生器中的热交换器管中去除塞子。 用于在这种插头上实施该方法的工具包括：第一液压致动器，用于首先使膨胀构件与内部插塞壁脱离接合;第二液压致动器，其能够附接到插头以向插塞施加静态拉力;以及 将空气冲击工具连接到第二液压致动器的装置，其与静力同时施加完全通过固体构件的插塞的高频脉冲。
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