May I ask, can a Siemens electromagnetic flowmeter still be used if a piece of the rubber lining has fallen off?
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As the title suggests, it relates to the limestone slurry pipeline used for desulfurization. Currently, the flow rate in this pipeline fluctuates greatly. At first, blockage was suspected; upon inspection, it was found that a piece of the rubber lining had fallen off, and the inside of the pipeline was unobstructed. However, even after reinstalling the rubber lining, the flow rate still fluctuated significantly, and the operation efficiency was much lower compared to before.
Change it; you can’t use domestic ones either – they work just the same, and it costs only a few thousand yuan.
This post was last edited by 955559 on 2018-8-22 at 13:41. Is there dirt inside the pipe? It’s affecting the electrodes’ conductivity, which in turn leads to a reduced flow rate. It is recommended to try cleaning the flow meter’s pipes first; if that doesn’t work, replace it with a new one. The following is the working principle of the electromagnetic flowmeter. Its operation is based on Faraday’s law of electromagnetic induction. The conductive medium inside the measuring tube acts as the conductive metal rod in Faraday’s experiment, with two electromagnetic coils at the upper and lower ends generating a constant magnetic field. An induced voltage is generated when a conductive medium flows through it. The two electrodes inside the pipe measure the induced voltage generated. Structurally, it consists of an electromagnetic flow meter and a converter. The sensor is installed on industrial process pipelines; its function is to linearly convert the volumetric flow rate of the liquid flowing into the pipeline into an induced potential signal, which is then sent to the converter via a transmission line. The converter is installed not too far away from the sensor; it amplifies the flow signal sent by the sensor and converts it into a standard electrical signal that is proportional to the flow rate, so as to enable display, accumulation, and control adjustments.
The original poster only said that a piece of the lining had fallen off, without mentioning where it was or whether it was at the electrode location It also doesn’t state to what extent the damage is – for example, whether the metal tube is exposed or not If it’s not one of the two situations mentioned above, check whether there are any foreign objects on the electrode surface such as scale; remove them and try again. If the electrode position is damaged, it can only be relined; I wonder if Siemens has any factories in China. In fact, electromagnetic flowmeters made in China perform very well; there is no need to import them, as they are much cheaper.
Part of the lining has fallen off, which will definitely affect the measurements; it’s no longer a straight tube
Excuse me, there are four screw-like things inside; are those electrodes?
Excuse me, is that thing that looks like a screw in the second picture an electrode? The lining around it has fallen off, exposing the metal tubes. Also, are there any affordable and good brands of flowmeters available in the domestic market?
For domestic products, it seems that Tiankang does everything.
There is little difference between domestic and imported electromagnetic flowmeters.
This is an electrode diagram; there are usually 3 of them inside the pipe. Check to see if they are covered by dirt