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technical article
The installation of oval gear flowmeter does not need to consider the length of the straight pipe in front of the flowmeter
2012-2-14 11:19:23

的使用注意事项: 首先,按照要求正确安装后的椭圆齿轮流量计,使用时即可保证足够的精度,通常累计值的精度可达0.5级,是一种较为准确的流量计量仪表。 Precautions for the use of the intelligent elliptical gear flowmeter : First, the elliptical gear flowmeter after the correct installation according to the requirements can ensure sufficient accuracy during use, and the accuracy of the cumulative value can usually reach level 0.5, which is a more accurate flowmeter. meter. However, if the flow rate of the measured medium is too small during use, the effect of the leakage error of the instrument will be prominent, and sufficient measurement accuracy cannot be guaranteed. Therefore, the oval gear flowmeters of different models and specifications have an allowable value for the minimum used flow rate. The measurement accuracy can be guaranteed only when the actual measured flow rate is greater than the lower limit flow rate allowable value. Secondly, when using an elliptical gear flowmeter, pay attention to the temperature of the measured medium must not be too high, otherwise it will not only increase the measurement error, but also may cause the gear to jam. For this reason, the oval gear flowmeter is used within the operating temperature range specified by the meter. After long-term use, the gears inside the oval gear flowmeter will be corroded and worn, which will affect the measurement accuracy. Therefore, it is necessary to pay attention to observation and take it apart regularly for inspection. If conditions permit, it is better to perform calibration regularly.

由于属于比较精密的仪器,容易出问题的地方大多是在内部,因为内部有齿轮工作,齿轮对流动液体的清洁度有要求。 Oval gear flowmeters are relatively sophisticated instruments, and most of the problem-prone parts are inside, because there are gears inside, and the gears have requirements for the cleanliness of flowing liquids. It is easy to be stuck, and there are problems such as no display or large display fluctuation. Common faults and solutions are as follows:
1. The degree on the display keeps a certain value unchanged, and the troubleshooting method: first determine whether it is a malfunction of the signal feedback system. Turn off the power and check whether the signal feedback loop is on and whether the voltage is normal. If the fault is not removed, you can clean the pipes and filters. If the filter or pipeline is damaged, the flow meter can be disassembled and inspected to remove impurities. When disassembling, remember the entry points of the upper and lower gears, and install them as they are. 2. The degree is unstable on the display, and the troubleshooting method is to check whether the flow rate display system is vibrated; or turn the gear of the flow meter by hand to see if the display reading has changed. Generate a limited feedback signal.
3. When the flow is small, the error is relatively large, and the troubleshooting method may be that the gear sleeve is worn or corroded by the medium, and the flowmeter casing is deformed. At this time, you can generally hear a clicking noise when the flow meter is working. 4. The error is very large or small. 4: Troubleshooting: The reason is that the fluid may contain gas, or the zero signal voltage is abnormal. Need to stop the operation to recalibrate the flowmeter. 5. There is a leak in the liquid, and the fault is handled. If there is a leak, the fault must be caused by the aging of the seal. It only needs to be replaced.

的安装其实要求并不高,比如它可以不用考虑流量计前直管道的长度,这个其他流量计是要求比较严格的。 The installation of elliptical gear flowmeters is actually not very demanding. For example, it does not need to consider the length of the straight pipe in front of the flowmeter. This other flowmeter is more stringent. The oval gear flow transmitter and the secondary instrument form an oval gear flow meter. When installing the transmitter, we need to carefully understand the impurities in the pipeline. If we consider that there may be impurities in the medium to be measured during use, a filter can be installed, which can extend the service life of the oval gear flowmeter and reduce the cost of routine maintenance. If the flowmeter is used in a relatively clean place, a stainless steel flowmeter can also be used. When installing, try to install it in a horizontal position. The transmitter should be installed at the output end of the pump to reduce measurement errors. If the measurement medium is mixed with gas, a gas separator should be installed. As long as you pay attention to the above issues, there will generally not be any problems in use, and it can be used stably for more than five years. Jinhu Dongxiang oval gear flowmeter mainly has cast iron, cast steel and stainless steel for different occasions.