Turbine flowmeter flange type liquid turbine intelligent meter head (DN15-200)

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.

常见的空气玻璃浮子流量计电解质有ZrO2.Y2O3，它由二元氧化物构成，其中ZrO2称为基材，Y2O3称为增稠剂。ZrO2在常温下是单斜晶体，在高温下它变为立方晶体(莹石型)，但当它制冷后又变成单斜晶体。因而，纯氧化锆的晶体结构是不稳定的。因此，如在ZrO2掺加一定量的增稠剂Y2O3时，因为Y3+换置了Zr4+的位置，一方面在晶体中留下了氧离子空化；另一方面因为晶体内部应力变化的原因，该晶体制冷后仍保存立方晶体。

因而，又称液体涡轮流量计卡箍式为平稳氧化锆。据以上分析，平稳氧化锆在高温下(650℃)是氧离子的优良导体。典型的氧化锆传感器是，那样在2个电级上，因为正负电荷的沉积而形成一个电势，称作氧浓差电动势。若用导线将2个电级连成电路时，负级里的电子便会根据外电路流进正级，再提供氧原子产生离子，电路中就有电流根据。