Turbine flowmeter flange type 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.

同时，氧化锆氧量分析仪可实行氧电势、探头温度、校正系数值的显示，并对锆管的加温电炉开展控温控制，且辅以断偶、超温保护、热偶接反维护，保证氧量计可靠工作。

涡街流量计供应商对现场具体情况分析

①现场情况简介在现场的具体使用中，安装氧化锆及表头后，经过较长时间系统才开始试运转。氧化锆电池发生老化、积尘、受SO2和SO3对电池的浸蚀等很多干扰因素的影响，运作情况下，仪器参数将发生慢慢转变，而给测量带来偏差，电池老化表现在内阻上升和本底辐射电势增大2个基本参数上。试运情况下氧量显示比预期的稍低。耐腐金属管浮子流量计试运结束后，氧化锆氧量计表头显示18%-19%，不能测量(空气中氧含量约为21%)。

②改造前状况试运转阶段，氧量值稍低，完毕试运以后测量空气中氧含量也显著稍低。