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Ultrasonic probing apparatus

  • US 4,331,034 A
  • Filed: 08/06/1979
  • Issued: 05/25/1982
  • Est. Priority Date: 04/09/1979
  • Status: Expired due to Term
First Claim
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1. An ultrasonic probing apparatus comprising:

  • annular guide rail means to be arranged in surrounding relation to a pipe to be ultrasonically probed for any flaws that might be present therein;

    a flaw detecting unit including a first truck mounted for circumferential movement on said rail means;

    a circumferentially driving unit including a second truck mounted for circumferential movement on said rail means; and

    an axially driving unit including a third truck mounted for circumferential movement on said rail means;

    said flaw detecting unit, said circumferentially driving unit and said axially driving unit being disposed separately from one another and arranged in spaced-apart relation on said annular guide rail means;

    means, separate from said rail means, for connecting said flaw detecting unit, said circumferentially driving unit and said axially driving unit together so that the trucks thereof may move together circumferentially of the pipe on the annular guide rail means and so that their weights produce torques about a horizontal pipe that generally cancel each other;

    said flaw detecting unit further including arm means movable axially relative to said annular guide rail means and said first truck and movable axially along the external surface of the pipe, and ultrasonic probing means for transmitting ultrasonic waves and receiving reflected waves from the pipe to detect pipe flaws and being attached to said arm means for movement therewith;

    said circumferentially driving unit further including first drive means for moving said circumferentially driving unit circumferentially of the pipe on said annular guide rail; and

    said axially driving unit further including second drive means, and transmission means for transmitting the drive force of said second drive means to said arm means to move said arm means axially of the pipe.

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