Sensor of oil field high-voltage high-viscosity electromagnetic flowmeter
An electromagnetic flowmeter and sensor technology, applied in the field of sensors, can solve the problems of the performance degradation of the instrument, the influence of the measured magnetic field lines on the uniformity of the magnetic field lines and the strength of the magnetic field, and the easy generation of residual magnetism, so as to achieve the effect of avoiding the phenomenon of residual magnetism.
Inactive Publication Date: 2010-10-20
上海晋想仪表科技有限公司
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Problems solved by technology
Since the electromagnetic flowmeter relies on the signal generated by the measurement medium cutting the magnetic field lines in the magnetic field, the uniformity of the magnetic field line distribution and the magnetic field strength directly lead to the measurement performance of the instrument; while the existing high-voltage electromagnetic flowmeter detects the signal. The electrode seat 3 is directly welded to the measurement catheter Connected; but because the stainless steel material is originally a non-magnetic material, the material will change qualitatively after welding, and it is easy to generate residual magnetism. The measured magnetic force line cannot penetrate at the residual magnetic position, which will affect the uniformity of the magnetic force line and the magnetic field strength, resulting in the performance of the instrument.
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[0010] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0011] Depend on figure 2 It can be seen that the present invention includes: the electrode base 30 and the measuring conduit 20 arranged on the electrode base 30; the electrode base 30 and the measuring conduit 20 are an integral structure; The connection part has a hole 21 for placing a screw; the measuring conduit 20 is connected with the electrode seat 30 through the screw.
[0012] The present invention improves the processing technology of the conduit, directly cuts the conduit through wire cutting and lathe processing, that is, directly punches the conduit, and processes it so as to meet the requirement of no welding process, so that the residual magnetism phenomenon of the conduit caused by welding may be avoided.
[0013] The invention enables the sensor to detect strong, stable, linear and other characteristics of the instrument duri...
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The invention relates to a sensor of an oil field high-voltage high-viscosity electromagnetic flowmeter. The sensor comprises an electrode base and a measuring guide tube arranged on the electrode base, wherein the electrode base and the measuring guide tube are formed into an integrated structure. The integrated structure is that: a hole for placing a screw is formed on the connected part of the measuring guide tube and the electrode base; and the measuring guide tube is connected with the electrode base through the screw. The sensor has the advantage that: a requirement of no need of a welding process is met, so that a guide tube remanence phenomenon caused by welding can be avoided.
Description
technical field [0001] The invention relates to an electromagnetic flowmeter, in particular to a sensor in the electromagnetic flowmeter. Background technique [0002] Magnetic flowmeters are based on Faraday's law of electromagnetic induction. That is: when the measuring medium cuts the magnetic force line in the magnetic field, the induced potential is generated in the conductor, and the induced potential is detected by the contacted electrode, and transmitted to the amplifier through the cable, and then converted into a unified signal output and displayed by the CPU operation. The electromagnetic flowmeter is composed of a converter and a sensor. The performance of the sensor directly affects the stability of the entire instrument. [0003] Depend on figure 1 It can be seen that the sensor is mainly composed of the signal detection electrode 1 and the measuring catheter 2 . Since the electromagnetic flowmeter relies on the signal generated by the measurement medium cut...
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IPC IPC(8): G01F1/58
Inventor 胡建田
Owner 上海晋想仪表科技有限公司