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technical article
Metal tube float flowmeterSome application places as long as the monitoring flow does not exceed
2012-3-20 15:14:57

的浮子中间装有导向杆,浮子可以平稳地在导杆上下运行,减小了浮子的跳动。 The metal tube float flowmeter is equipped with a guide rod in the middle of the float. The float can smoothly run up and down the guide rod, which reduces the jump of the float. However, if the guide rod is bent or the float is slightly deformed, the movement will be limited and the reading will not work. The most likely cause is because the valve is quickly opened or closed quickly, which results in the occurrence of air pockets or water hammer, which causes the float to violently impact in the flow meter, which deforms the float or bends the guide rod. The solution is to do it slowly when opening and closing the valve. The second reason is due to the magnetic coupling and the effect. The long-term high temperature or the use environment is too bad, which causes the magnetic coupling and magnetic properties to drop, and the movement of the float cannot drive the pointer's indication. The other is because a lot of iron powder particles are adsorbed inside the metal tube float flowmeter. The solution is to use a magnetic filter in front of the metal tube float flowmeter to filter impurities such as iron filings and iron powder. The third reason is caused by the deformation of the internal structure of the metal tube float flowmeter. The possible reasons are that the mechanical transmission parts such as the pointer gear are stuck, and the float or liner of the PTFE material is deformed. In this case, only the float and lining can be replaced to solve the problem.

的指针动作的不畅。 In addition, because the medium is too viscous and sticks to the float and the inner wall, in addition to the error of the flow meter , the pointer of the metal tube float flow meter will also cause poor pointer operation. In this case, just remove the flowmeter and clean it to restore the original accuracy.


作为直观流动指示或测量精确度要求不高的现场指示仪表,占浮子流量计应用的90%以上,被广泛地用在电力、石化、化工、冶金、医药等流程工业和污水处理等公用事业。 Metal tube float flow meter, as an intuitive flow indication or on-site indicating instrument with low measurement accuracy requirements, accounts for more than 90% of the application of float flow meters. It is widely used in power industry, petrochemical, chemical, metallurgical, pharmaceutical and other process industries and sewage Processing and other utilities. Some application sites only need to monitor the flow rate not exceeding or not lower than a certain value. For example, the increase of the cable inert protective gas flow indicates that a new leak point has occurred. The environmental protection atmospheric sampling and process industry online monitoring and analysis instruments continuously sample, and the sampling flow monitoring is also the bulk service object of the float flowmeter. As the measurement of liquid level, density and other parameters in the process industry, constant flow measurement and control auxiliary instruments are widely used and also occupy a considerable share. Remote transmission metal float flow meters with signal output are commonly used in process industries for flow control detection instruments or pipeline mixing ratios, such as controlling the ratio of raw water and chemical solution in the water treatment process. 2 Type and structure selection The main measurement object of the float meter is a single-phase liquid or gas. Particles in the liquid or droplets in the gas are usually not applicable. Because the float adheres to particles or tiny bubbles in the liquid flow, it will affect the measured value. If you need to transmit the signal far away for total accumulation or flow control, generally use a metal tube float flowmeter with electrical signal output. If the ambient atmosphere has explosion-proof requirements and there is a gas source for control instruments on the site, remote transmission metal float flow meters are given priority. If electric remote transmission instruments are selected, they must be explosion-proof. When measuring opaque liquids, a metal tube float meter is more common. For measuring high-viscosity liquids with a temperature higher than the ambient temperature and liquids that easily precipitate crystals or solidify when the temperature drops, a jacketed metal tube float flow meter should be used.