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公开(公告)号：US5100610A
公开(公告)日：1992-03-31
申请号：US616444
申请日：1990-11-20
申请人： William E. Pirl , Edward A. Ray , Annette M. Costlow , Charles H Roth, Jr. , Francis X. Gradich , David A. Chizmar
发明人： William E. Pirl , Edward A. Ray , Annette M. Costlow , Charles H Roth, Jr. , Francis X. Gradich , David A. Chizmar
CPC分类号： G01B7/28 , F22B37/003 , F28F11/02 , G01N27/902
摘要： System for inspecting the interior of tube plugs, particularly tube plugs of the type having expander elements disposed therein. The system includes a probe assembly connectable to the tube plug, the probe assembly having a rotatable and translatable probe carrier housing for housing a sensor probe capable of inspecting the tube plug. The probe assembly also includes a leaf spring extending through the probe carrier housing and attached to the sensor probe for radially outwardly biasing the sensor probe into sensing contact with the interior of the tube plug, particularly the interior of the tube plug located between the top of the tube plug and the expander element. A tangle-free flexible hose is connected at one end thereof to the probe carrier housing for transversely rotating and longitudinally translating the probe carrier housing. The flexible hose is also connected at the other end thereof to a probe driver assembly that rotates the flexible hose which in turn rotates the probe carrier housing. Rotation of the probe carrier housing rotatably translates the probe carrier housing into the tube plug for inspecting the tube plug in a helical scanning pattern.
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公开(公告)号：US4586249A
公开(公告)日：1986-05-06
申请号：US567107
申请日：1983-12-30
CPC分类号： C21D7/12 , B21D39/203 , Y10T29/49805 , Y10T29/531
摘要： An improved fluid mandrel having an eddy current probe connected thereto is disclosed herein. The eddy current probe generally comprises a probe body which is detachably connectable to the bottom of a fluid mandrel on one end, and a source of hydraulic fluid on the other end. The probe body includes a pair of sensing coils which are separated along the longitudinal axis of the body by a distance approximately equal to the thickness of the metallic structure desired to be detected. The improved mandrel finds particular application in performing expansions which eliminate the clearance between heat exchange tubes extending through the baffle plates in nuclear steam generators. In such an application, the sensing coils of the probe are longitudinally spaced the same distance as the thickness of the baffle plates in order to generate a sharp and unambiguous electronic signal indicative of the relative positions of the mandrel and the baffle plate.
摘要翻译： 本文公开了具有连接到其上的涡流探针的改进的流体心轴。 涡流探针通常包括探针主体，其可拆卸地连接到一端上的流体心轴的底部，另一端上具有液压流体源。 探针主体包括一对感测线圈，它们沿主体的纵向轴线分开大约等于期望被检测的金属结构的厚度的距离。 改进的心轴在执行膨胀时具有特别的应用，其消除了延伸穿过核蒸汽发生器中的挡板的热交换管之间的间隙。 在这种应用中，探头的感测线圈纵向间隔与挡板的厚度相同的距离，以产生指示心轴和挡板的相对位置的清晰且明确的电子信号。
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3.发明授权Apparatus and method for simultaneously loading a reinforcing sleeve and mandrel into a tube 失效用于将加强套筒和心轴同时加载到管中的装置和方法
公开(公告)号：US4829648A
公开(公告)日：1989-05-16
申请号：US6845
申请日：1987-01-27
CPC分类号： B23P19/022 , B21D39/203 , F22B37/003 , F28F11/02 , Y10T29/49352 , Y10T29/49387 , Y10T29/531 , Y10T29/53113 , Y10T29/5383
摘要： An apparatus and method for remotely inserting and positioning a sleeve-loaded mandrel within a damaged tube mounted in the tubesheet of a nuclear steam generator is disclosed herein. The apparatus of the invention generally comprises a frame, a mounting mechanism for detachably and pivotally mounting the frame to the open end of one of a first tube in the tubesheet, an advancing assembly supported by the frame for remotely inserting and advancing the sleeve-loaded mandrel to a position across a damaged section of the selected tube, and a drive train for pivotally positioning the advancing assembly into alignment with the open end of the selected tube. In the preferred embodiment, the advancing means is formed from the pair of hydraulically operated grippers, one of which is reciprocably movable with respect to the other. Additionally, the mounting mechanism inlcudes a double-action hydraulic cylinder that is capable of translating the frame into engagement with the tubesheet after the advancing assembly has been pivoted into alignment with the damaged tube. In the method of the invention, the first tube is chosen so that the advancement assembly may be pivoted into position under two or more tubes that need to be sleeved.
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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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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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