Procedure analysis and knowledge explanation of orifice flowmeter:Introduction of Xi'an Huaheng Instrument:Standard orifice flowmeter designed,manufactured and calibrated according to the national standard does not need real-flow calibration.It has high accuracy,simple structure and low manufacturing cost,but the pressure loss is the largest in all standard throttling devices,and it is not suitable for situations requiring low pressure loss.Standard orifice plate is widely used.Petroleum,chemical,metallurgical,electric power and other industries.

 

　　孔板流量計(jì)主要由孔板節(jié)流裝置，三閥組，差壓變送器，流量積算儀，溫溫度變送器，壓力變送器組成

 

　　Orifice flowmeter mainly consists of orifice throttle device,three valve groups,differential pressure transmitter,flow accumulator,temperature transmitter and pressure transmitter.

 

　　孔板流量計(jì)可廣泛應(yīng)用于石油、化工、天然氣、冶金、電力、制藥等行業(yè)中，各種液體、氣體、天燃?xì)庖约罢羝捏w積流量或質(zhì)量流量的連續(xù)測(cè)量。但是許多人不知道孔板流量計(jì)的程序分析，今天我就和大家探討一下孔板流量計(jì)的程序分析

 

　　Orifice plate flowmeter can be widely used in petroleum,chemical industry,natural gas,metallurgy,electric power,pharmaceuticals and other industries,continuous measurement of volume flow or mass flow of various liquids,gases,natural gas and steam.But many people don't know the program analysis of orifice flowmeter.Today I will discuss with you the program analysis of orifice flowmeter.

 

　　1.瞬時(shí)量

　　溫度量：必須轉(zhuǎn)換成絕對(duì)攝氏溫度；即+273.15；

　　壓力量：必須轉(zhuǎn)換成絕對(duì)壓力進(jìn)行計(jì)算。即表壓+大氣壓力；

　　補(bǔ)償計(jì)算根據(jù)計(jì)算公式，數(shù)據(jù)保存在PLC的寄存器內(nèi)。同時(shí)在intouch畫面上做監(jiān)視。

 

　　1.instantaneous quantity

　　Temperature:must be converted to absolute Celsius temperature,i.e.+273.15;

　　Pressure:It must be converted to absolute pressure for calculation.That is,surface pressure+atmospheric pressure;

　　The compensation calculation is based on the calculation formula,and the data are stored in the register of the PLC.At the same time,monitor on the InTouch screen.

 

　　2.累積量

　　采用2秒中一個(gè)掃描上升沿觸發(fā)進(jìn)行累積，即將補(bǔ)償流量值(Nm3/h)比上1800單位轉(zhuǎn)換成每2S的流量值，孔板流量計(jì)進(jìn)行累積求和，畫面帶復(fù)位清零功能。

 

　　2.cumulants

　　A scanning rising edge trigger in 2 seconds is used to accumulate,i.e.the compensated flow value(Nm3/h)is converted from 1800 units to the flow value of every 2S.The orifice flowmeter is used to accumulate and sum,and the picture has reset and zero-clearing function.