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303 条记录 (耗时 0.01 秒)

    Pipe weld inspection method and apparatus
    91.
    发明授权
    Pipe weld inspection method and apparatus 失效
    管道焊接检验方法和设备

    公开(公告)号：US3835324A

    公开(公告)日：1974-09-10

    申请号：US29494372

    申请日：1972-10-04

    申请人： WEIGLE O

    发明人： WEIGLE O

    IPC分类号： G01N23/18 ,  G01T1/10

    CPC分类号： G01N23/18

    摘要： An illustrative embodiment of the invention includes method and apparatus for pipe weld seam inspection. A gamma ray source of relatively low intensity is disposed on the interior portion near the center of a pipe section being inspected. A gamma ray detector comprising an activated scintillating crystal and a photomultiplier tube is traversed in a track on an elastomeric belt about the circumference of the pipe and maintained adjacent said weld seam at all circumferential points. The intensity of the gamma radiation penetrating the weld seam is sensed and recorded as a function of the circumferential location of the detectors. This recording may then be interpreted in terms of the material density of the weld at all circumferential points on the seam.

    摘要翻译： 本发明的说明性实施例包括用于管道焊缝检查的方法和装置。 相对低强度的伽马射线源设置在被检查的管段中心附近的内部。 包括活化的闪烁晶体和光电倍增管的伽马射线检测器在弹性体带周围的轨道上绕过管的周边并且在所有圆周点处保持在所述焊缝附近。 根据检测器的周向位置来检测和记录穿透焊缝的伽马辐射的强度。 然后可以根据接缝上所有圆周点处的焊缝的材料密度来解释该记录。

    Equipment for radiography of pipelines and closed vessels
    92.
    发明授权
    Equipment for radiography of pipelines and closed vessels 失效
    管道和封闭容器放射性物质的设备

    公开(公告)号：US3665187A

    公开(公告)日：1972-05-23

    申请号：US3665187D

    申请日：1968-12-24

    申请人： NAT RES DEV

    发明人： STEIN STEPHEN

    IPC分类号： G01N23/18 ,  G03B41/16

    CPC分类号： G01N23/18

    摘要： A pipeline crawler in the form of a self-propelled vehicle is controlled by a radiation detector carried on the vehicle. The vehicle carries a powerful radiation source and a movable shield for the source which is normally in the closed position. On energization of the detector from a weak radiation source placed outside the pipe the vehicle is stopped by the activation of its brakes and the radiation shield opens to expose the source. A timing mechanism operates to close the shield, release the brakes and restart the vehicle after a predetermined time.