About the installation method of liquid turbine flowmeter
Author: Dichuan instruments Posted: 2015/10/23
是一种最典型的速度式流量计 ，它是利用悬置于流体中带叶片的转子或叶轮感受流体的平均流速而推导出被测流体的瞬时流量和累计流量，从而实现流量测量的目的。 Turbine flowmeter is the most typical speed type flowmeter . It uses the rotor or impeller suspended in the fluid to sense the average flow velocity of the fluid to derive the instantaneous flow rate and accumulated flow rate of the measured fluid, thereby achieving flow measurement. the goal of. The turbine flowmeter is generally composed of a turbine flow sensor and a display instrument, and its installation needs to pay attention to the following points.
、安装时液体流动方向应与传感器外壳上指示流向的箭头方向一致，且上游直管段应≥20dn ，下游直管段应≥5dn ，其中dn为管道内径。 1. The direction of liquid flow during installation should be consistent with the direction of the arrow on the sensor housing, and the upstream straight pipe section should be ≥20dn , and the downstream straight pipe section should be ≥5dn , where dn is the inner diameter of the pipeline.
、传感器应远离外界磁场，如不能避免，应采取必要的措施； 2. The sensor should be kept away from the external magnetic field. If it cannot be avoided, necessary measures should be taken;
、为了检修时不至影响液体的正常输送，应在传感器两端的直管段外安装旁通管道； 3. In order not to affect the normal transportation of liquid during maintenance, bypass pipes should be installed outside the straight pipe sections at both ends of the sensor;
、传感器与显示仪表的接线，应根据放大器的电源来选择接线方式。 5. The connection between the sensor and the display instrument should be selected according to the power supply of the amplifier.
、液体流量计传感器可水平、垂直安装，垂时流体方向必须向上。 6. The liquid flow sensor can be installed horizontally and vertically, and the fluid direction must be upward when vertical. The liquid should fill the pipe without air bubbles. During installation, the direction of liquid flow should be the same as the direction of the arrow on the sensor housing. 倍公称通径长度的直管段，下游端应不少于5倍公称通径的直管段，其内壁应光滑清洁，无凹痕、积垢和起皮等缺陷。 The upstream end of the sensor should have at least 20 times the nominal diameter length of the straight pipe section, and the downstream end should be no less than 5 times the nominal diameter length of the straight pipe section.
、若流体不稳定有脉动流，为保证转子流量计的良好测量可安装缓冲器，以消除脉动流。 7. If the fluid is unstable and has a pulsating flow, a buffer can be installed to ensure the good measurement of the rotor flowmeter to eliminate the pulsating flow. When the rotor flowmeter is in use, first slowly open the control valve on the upstream pipe of the flowmeter, and then use the regulating valve to adjust the flow rate, so as to avoid the sudden rise of the float to cause damage to the cone tube.
的测量精度高，量程比款，适用于流量变化幅度较大的现场测量。 Turbine flowmeters have high measurement accuracy and range ratios, and are suitable for on-site measurement with large flow changes. And the pressure loss is small, and high pressure resistance, each component of the instrument can be made of various anti-corrosive materials, is a widely used flow instrument.