Turbine flowmeter threaded gas turbine intelligent meter head

Overview.

LWY, LWQ series turbine flowmeter is based on the principle of torque balance and is a velocity type flow meter. The sensor has a simple structure, lightweight, high accuracy, good repeatability, responsive, easy to install and maintain the use of features, widely used in petroleum, chemical, gold, water supply, paper and other industries, is the ideal instrument for flow measurement and energy saving.

Sensor and display meter supporting the use, suitable for measuring closed pipeline with stainless steel 0Cr18Ni9, 2CrI3, hard alloy does not corrode, and no fibers, particles and other impurities of the liquid. If matched with display instruments with special functions, it can also be used for quantitative control, over-volume alarm, etc. The optional explosion-proof type of this product is ExdIICT6Gb, which can be used in explosive hazardous environment.

The sensor is suitable for the medium whose viscosity is less than 5×10＾-6m＾2/s at working temperature. For the liquid whose viscosity is greater than 5×10＾-6m＾2/s, the sensor should be calibrated for real liquid and then used.

◆Product implementation standard: JB/T9246-2016 (industry standard)

◆General standard of flange: GB/T9113.1-2010 (national standard)

◆Type approval certificate: 2016F648-33

Working principle.

Fluid flow through the sensor shell, due to the impeller blade and flow direction has a certain angle, the impulse of the fluid so that the blade has a rotational moment, after overcoming the friction torque and fluid resistance blade rotation, in the torque balance after the speed is stable, under certain conditions, the speed is proportional to the flow rate, because the blade has a magnetic conductivity, it is in the magnetic field of the signal detector (composed of persistent magnets and coils), the rotating blade cutting Magnetic lines of force, periodically changing the magnetic flux of the coil, so that both ends of the coil induction out of the electrical pulse signal, this signal through the amplifier amplification and shaping, the formation of a certain amplitude of continuous rectangular pulse wave, can be transmitted to the display meter, showing the instantaneous flow of fluid or total. In a certain flow range, the pulse frequency is proportional to the fluid flowing through the sensor (instantaneous flow rate Q), and the flow rate calculation formula is as follows:

Features.

1. The sensor is carbide bearing thrust type, which not only ensures the accuracy and wear resistance, but also has the characteristics of simple structure, firmness and easy disassembly and installation.

2. A variety of meter head forms: 3-wire pulse output; 2-wire 4~20mA current output; field display and output 4~20mA; battery power supply, etc., suitable for different use occasions.

3. Intelligent processing: the meter coefficient can be multi-point non-linear correction to ensure the full range of high precision.

4. Instrument coefficients, cumulative flow value and other parameters of the power-down hold, ten years without loss.

一体式玻璃浮子流量计池电势由能斯特方程给出：在温度700℃时，当固态电介质一侧血氧为气体(20.6%)时，由浓差电池导出电动势E，就能够计算出固态电介质另一侧血氧，这就是氧化锆氧量分析仪的测氧原理。

在实际应用中，因为仪表出厂检验的量程(0-10%)与现场要求(0-25%)不同，而且出厂后经过较长时间才安装应用，造成氧量计测量值发生误差，其测量气体含氧量为19%上下，与具体情况有较大误差。经监督检查调节发觉，其原因与E的补偿值(本底辐射电势)相关。

氧化锆氧量分析仪测量的特性氧探头的氧电势信号、热偶温度信号经放大送A/D电路，片式微机系统CPU收集到其信号后，超声波玻璃浮子流量计与校正系数一起开展数据处理，即可得到氧含量的百分含量。