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基于天然气涡轮流量计的测量原理,探讨了其起始流量和安装方法。在适当的起始流量下,流量与转速呈线性关系;推荐在流量计入口和出口端各加接一定长度的直管段,若安装空间不能满足要求,可在阻流设备与流量计之间安装整流器,避免因气体流态改变影响流量计转子的转动。分析了天然气涡轮流量计在运行过程中的常见故障:天然气正常流动,流量计不计数;未作减量操作,流量显示逐渐下降;天然气不流动,流量显示不为零。针对以上故障,分别给出了相应的操作维护方法。结合应用实例,提出了天然气涡轮流量计在使用过程中的注意事项。
Based on the measurement principle of natural gas turbine flowmeter, the initial flow rate and installation method are discussed. At the proper initial flow rate, the flow rate is linear with the rotation speed. It is recommended to add a straight pipe segment with a certain length at the inlet and the outlet of the flowmeter. If the installation space can not meet the requirements, it can be installed between the flow resistance device and the flowmeter Rectifier, to avoid flow changes due to gas flow meter rotor rotation. The common faults of natural gas turbine flowmeter during operation are analyzed. Natural gas flows normally and the flowmeter does not count. No reduction operation is performed, and the flow rate shows a gradual decrease. Natural gas does not flow and the flow rate is not zero. In view of the above faults, corresponding operation and maintenance methods are given respectively. Combined with application examples, the gas turbine flowmeter in the process of using precautions.