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technical article
Small pressure loss, large range, high accuracy, plug-in vortex flowmeter
2012-2-21 9:35:13

How to install a plug-in vortex flowmeter
传感器的位置上,用气割方法开一个孔径为Φ107的圆孔,并使其轴线与管道轴线正交90℃,以保证法兰短管准确焊接。 At the position where the plug-in vortex flowmeter sensor is installed, a circular hole with a diameter of Φ107 is opened by gas cutting, and its axis is orthogonal to the axis of the pipeline by 90 ° C, so as to ensure accurate welding of the short flange pipe. Flanged short pipes with corresponding diameters are welded at the round holes. After welding, ensure that the central axis of the flange short pipe is orthogonal to the central axis of the pipe. Insert the test head into the pipe to a depth of 0.5 times the pipe diameter. To measure the properties of the medium, a corresponding gasket must be installed between the flange on the plug-in vortex flowmeter and the flange of the flange short tube, and then the flange must be solid. The handle rotates the lead screw and adjusts the detection head to match the flow direction.


主要用于各种行业工业管道中大口径气体、液体、蒸汽介质流体的流量测量.插入式涡街流量计特点是压力损失小,量程范围大,精度高,在测量工况体积流量时几乎不受流体密度、压力、温度、粘度等参数的影响.无可动机械零件,因此可靠性高,维护量小。 Plug-in vortex flowmeters are mainly used to measure the flow of large-caliber gas, liquid, and steam medium fluids in industrial pipelines in various industries. Plug-in vortex flowmeters are characterized by small pressure loss, large range and high accuracy. The volume flow rate is hardly affected by parameters such as fluid density, pressure, temperature, viscosity, etc. There are no moving mechanical parts, so it has high reliability and low maintenance. DEC-LUGB-C plug-in vortex flowmeter explosion-proof type, in accordance with the relevant provisions of GB3836-83 "Explosion-proof electrical equipment for explosive environments", the explosion-proof mark is ExdIIBT6. Working principle: According to the International Organization for Standardization IS07145 (fluid flow measurement in a ring-shaped closed pipe-speed measurement method at one point of the cross-section), a vortex street speed probe embedded in a piezoelectric crystal is inserted into a large-diameter industrial pipe, and Kamen The vortex frequency is converted into a current or voltage pulse signal or a 4-20mADC current signal that is proportional to the flow rate. Features of the instrument: 1. It can measure the volume flow and mass flow of steam, gas, and liquid; 2. It has no mechanical moving parts, high measurement accuracy, compact structure and convenient maintenance; 3. Small pressure loss, wide measuring range; the range is up to 1: 25; 4. Adopt anti-disturbance circuit and anti-vibration sensor head; 5. Adopt anti-disturbance circuit and anti-vibration sensor head to make the instrument have certain anti-vibration performance; 6. Measurable medium temperature reaches + 250 ℃. 7. The sensor can be continuously disassembled and assembled, and the amplifier can be separated from the sensor (separation distance 15m); the instrument parameters can be stable for a long time. The plug-in vortex flowmeter uses a piezoelectric stress sensor with high reliability and can work in the operating temperature range of -20 ° C to + 250 ° C. It has analog standard signal and digital pulse signal output. It is easy to be used with digital systems such as computers. It is a relatively advanced and ideal flow meter.

是应用流体振荡原理来测量流量的,流体在管道中经过涡街流量变送器时,在三角柱的旋涡发生体后上下交替产生正比于流速的两列旋涡,旋涡的释放频率与流过旋涡发生体的流体平均速度及旋涡发生体特征宽度有关。 The plug-in vortex flowmeter uses the principle of fluid oscillation to measure the flow. When the fluid passes through the vortex flow transmitter in the pipeline, two rows of vortexes proportional to the flow rate are alternately generated up and down after the vortex generator of the triangular column. The frequency is related to the average velocity of the fluid flowing through the vortex generator and the characteristic width of the vortex generator. The plug-in vortex flowmeter is a meter in which a non-streamline vortex generator is placed in the fluid, and the fluid is alternately separated on both sides of the generator to release two strings of regularly-arranged vortex generators. Plug-in vortex flowmeter can be divided into stress type, strain type, capacitive type, thermal type, vibrating body type, photoelectric type and ultrasonic type according to the frequency detection method.