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    • 4. 发明授权
    • Device for detecting flooding of a hollow structure
    • 用于检测中空结构的淹水的装置
    • US4445363A
    • 1984-05-01
    • US349984
    • 1982-02-18
    • Alan BennettDerek Brown
    • Alan BennettDerek Brown
    • G01N29/04G01F23/296G01M3/24
    • G01M3/24G01F23/2961G01F23/2965G01N2291/02836
    • An inspection device detects flooding in a hollow structural member such as the leg of an oil or gas rig so as to detect the presence of through wall cracks in the member. The device comprises an ultrasonic transducer for transmitting a pulsed beam of ultrasonic sound to pass through opposing faced walls or wall portions of the member and a visual indicator responsive to time spaced echoes of the ultrasonic beam reflected respectively from the opposing walls or wall portions and received by the transducer to indicate the presence or absence of flooding in the member. The transducer is located in the bridge plate of a jig and its beam passes through an aperture in a support frame of the jig. The support frame has a pair of spaced magnetic feet attached to a bracket on the frame and a further magnetic foot secured to the frame, the feet permitting the jig to be clamped onto a steel rig member so that the transducer can be optimally aligned with the member to optimize received echoes.The bridge plate is movable in two orthogonal planes by adjusting control knobs so as to optimize alignment. A further visual indicator also responsive to the echoes from the transducer is adjustable to indicate whether the transducer is optimally aligned and only when the transducer is optimally aligned is the presence of flooding, if indicated by indicator, taken to be valid.
    • 检查装置检测诸如油或钻井平台的腿部的中空结构构件中的淹水,以便检测构件中是否存在通孔壁裂缝。 该装置包括超声换能器,用于传送超声波的脉冲束以通过相对的面对面或该部件的壁部分,以及视觉指示器,其响应于分别从相对的壁或壁部反射的超声波束的时间间隔回波并被接收 通过换能器来指示在构件中是否存在淹水。 传感器位于夹具的桥板中,其光束通过夹具的支撑框架中的孔。 支撑框架具有连接到框架上的支架的一对隔开的磁性脚,以及固定到框架的另一个磁性脚,脚允许夹具夹在钢钻机构件上,使得换能器可以与 成员优化接收到的回声。 桥板可以通过调节控制旋钮在两个正交平面中移动,以优化对准。 响应于来自换能器的回波的另外的视觉指示器是可调节的,以指示换能器是否被最佳对准,并且仅当换能器被最佳对准时,如果由指示器指示,则存在溢流被认为是有效的。