How to solve the problem of intelligent vortex flowmeter pipeline with flow mete - São Paulo

Sexta-feira, 17 abril 2020

Detalhes do anúncio

Cidade: São Paulo
Operação: Compra

Contato

Nome xunyi2019
Número de telefone 051986577655

Detalhes da publicação

Intelligent vortex flowmeter is mainly used for the flow measurement of industrial pipeline medium fluid, such as gas, liquid, steam and other media. No moving mechanical parts, so high reliability and low maintenance. Instrument parameters can be stable for a long time. Vortex flowmeter adopts piezoelectric stress sensor, which has high reliability and can work in the working temperature range of -20 ℃ ~ + 250 ℃.
1) The possible cause of the failure is that the power supply has failed or the power supply is not connected. Therefore, it is necessary to check whether the power supply voltage meets the requirements and whether the power supply polarity is correct. For example, the current output vortex flowmeter, if the polarity of the power supply is reversed, the output current is 0mA instead of 4mA
2) The possible cause of the failure is disconnection of the connecting cable or incorrect wiring. Need to check whether the line is smooth, if there is a fault, re-wire and check.
3) The possible cause of failure is that the ripple factor of the power supply is too large. During the inspection, a filter electrolytic capacitor can be used for testing. Generally, a capacitor of ³100μF and 50V is required.
4) The possible cause of the failure is a malfunction of the vortex flowmeter amplifier board at a certain stage. You can observe the changes in the output by observing the waveforms at the input and output of the amplifier, or injecting human body induction signals from the input. If there is no change at the output, then the amplifier is not working properly. In actual maintenance, you can also use other types of flowmeter motherboard replacement on site to check. It is determined that the amplifying plate is faulty and should be replaced.
5) The possible cause of failure is damage to the body of the vortex flowmeter sensor. The method of detection first increases the flow rate, and replaces this vortex main board with the same type of vortex flowmeter. If the main board is eliminated, check the occurrence.

    Vortex flowmeter body damage occurs mostly in the steam measurement system. Because the technician opens the valve too fast, the high-temperature and high-pressure water vapor entrains condensate and violently impacts the vortex generator body, causing it to be damaged. "phenomenon. Therefore, it is necessary to open the guide drain to drain the condensate and then slowly open the steam valve to avoid damage to the vortex body.
6) The possible cause of the failure is that the flow rate of the pipeline is too low and does not enter the measurement range. You can increase the flow rate to see the response of the flowmeter. Continuous tapping next to the pipeline near the vortex flowmeter, no matter what type of vortex flowmeter, the flow rate display will appear. If the measured medium is liquid, empty tube test, because the liquid itself is a shock absorber. The troubleshooting method is to replace the flowmeter with a smaller diameter or increase the flow rate if the process conditions permit.
7) The possible cause of failure is whether the gap between the generating body and the casing is caught by fine particles. This kind of phenomenon usually occurs after normal work, shut down and restart. If this is the case, when it is confirmed that both the conversion amplifier and the generator are intact, especially if the measurement medium is liquid again, it can generally be regarded as this kind of failure. The processing method is as long as the production process conditions allow, open the flow rate as much as possible, and use a wooden or rubber hammer to vertically strike on the welding table under the flowmeter, so that the negative pressure generated by the high-speed fluid will take away the fine solid particles. If the site allows disassembly and cleaning, the generator can be removed, but it is required to be familiar with the structure of the flowmeter, especially the sealing gasket and pressure plate screws, etc., and it must be installed in strict accordance with the requirements of the instruction manual. At the same time, we must pay attention to the occurrence of reinstallation after disassembly, which may bring some changes to the flow coefficient. Although the change is not large, it needs to be corrected.
8) Check whether the parameter setting is wrong according to the instructions of the vortex flowmeter, and if so, correct it.

  Changzhou Xunyi Automation Instrumentation Co., Ltd. is a professional manufacturer of electromagnetic flowmeters, flow meters, turbine flowmeters, vortex flowmeters, magnetic flap level gauges, thermocouples, thermal resistance, bimetal thermometers, and pressure gauges of various specifications Etc., as well as manufacturers of various non-standard flowmeters, the company has advanced management level, modern professional production equipment, calibration device.