公开(公告)号：WO2015006975A1

公开(公告)日：2015-01-22

申请号：PCT/CN2013/079689

申请日：2013-07-19

Applicant: ROSEMOUNT INC. ,  GAO, Yanghui ,  WANG, Haipeng

Inventor： GAO, Yanghui ,  WANG, Haipeng

IPC: G01F1/58

CPC classification number: G01F1/588 ,  G01F1/586 ,  G01F1/60

Abstract: A magnetic flowmeter (102) for measuring flow rate of a process fluid includes: a magnetic coil (124A) arranged to apply a magnetic field to the process fluid. A pair of electrodes (124) electrically couple to the process fluid and are arranged to sense a voltage induced in the process fluid related to the applied magnetic field and the flow rate of the process fluid. A flow tube (108) of a non-conductive material is arranged to receive a flow of the process fluid therethrough. The flow tube (108) carries the magnetic coil (124A) and the pair of electrodes (124). Flow meter circuitry applies a current to the magnetic coil (124A) and receives the voltage sensed by the pair of electrodes (124). A magnetic field spreader (208A) is positioned proximate the magnetic coil (124A) and is arranged to spread the magnetic field emanating from the magnetic coil (124A) and direct the magnetic field into the flow tube (108). An exterior wrapper (206A) extends around the assembly and completes a magnetic circuit.

Abstract translation: 用于测量处理流体的流量的磁流量计（102）包括：布置成向处理流体施加磁场的磁线圈（124A）。 一对电极（124）电耦合到过程流体并被布置成感测与所施加的磁场相关的过程流体感应的电压和过程流体的流量。 布置非导电材料的流管（108）以接收流过其中的流体流。 流管108承载电磁线圈（124A）和一对电极（124）。 流量计电路向电磁线圈（124A）施加电流并接收由该对电极（124）感测的电压。 磁场扩展器（208A）位于电磁线圈（124A）附近，并布置成扩展从磁线圈（124A）发出的磁场并将磁场引导到流管（108）中。 外部包装件（206A）围绕组件延伸并完成磁​​路。