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Measuring system with a flow conditioner arranged at an inlet of a measuring tube

  • US 20100011878A1
  • Filed: 09/23/2009
  • Published: 01/21/2010
  • Est. Priority Date: 07/21/2006
  • Status: Active Grant
First Claim
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1. Measuring system for registering at least one measured variable of a medium flowing in a process line, said measuring system comprising:

  • an inlet;

    a measuring transducer including a measuring tube and a sensor arrangement with at least one sensor element reacting to the variable to be registered,said measuring tube serving for conveying the medium to be measured and said measuring tube showing a smaller flow cross section than a supply segment of the process line connected to said inlet of the measuring system,said measuring transducer providing, by means of the at least one sensor element, at least one measurement signal influenced by the measured variable;

    a measuring electronics communicating with the measuring transducer and producing, at least at times, taking into consideration the at least one measurement signal, at least one measured value instantaneously representing the measured variable; and

    a flow conditioner arranged at an inlet of the measuring tube,said flow conditioner mediating between the measuring tube and the supply segment of the process line and showing a lumen, which tapers toward the measuring tube and through which medium flows during operation,said flow conditioner including an inlet end facing the supply segment of the process line and showing a flow cross section, which is greater than the flow cross section of the measuring tube,said flow conditioner including an outlet end facing toward the measuring tube and showing a flow cross section, which is smaller than the flow cross section of the inlet end of the flow conditioner, andsaid flow conditioner including, arranged upstream of its outlet end, at least one inner edge, which protrudes into the lumen of the flow conditioner and against which medium, conveyed in the flow conditioner, flows during operation, said inner edge bounding a cross section of the lumen of the flow conditioner, said cross section bound by the inner edge being smaller than the flow cross section of the supply segment of the process line;

    wherein;

    the at least one inner edge protruding into said lumen of said flow conditioner limits an impingement surface of said flow conditioner arranged in a border region of said flow conditioner, andthe at least one inner edge protruding into said lumen of said flow conditioner limits a guide surface of said flow conditioner extending in the direction of the outlet end of said flow conditioner and serving for guiding medium flowing in said flow conditioner.

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