| 孔板流量計使用正確的流速以及特點 |
| 信息來源： 流量變送器 | 2019-04-12 點擊量： 11404 |
孔板流量計使用正確的流速以及特點？西安華恒儀表制造有限公司介紹：孔板流量計按國標(biāo)規(guī)定進行設(shè)計、制造和檢定的標(biāo)準孔板無需實流標(biāo)定，精度高、結(jié)構(gòu)簡單、制造成本低，但壓力損失在所有標(biāo)準節(jié)流裝置中最大，不適用于要求壓力損失小的情況，標(biāo)準孔板廣泛用于石油、化工、冶金、電力等行業(yè)。
Does orifice flowmeter use correct flow rate and characteristics?Xi'an Huaheng Instrument Manufacturing Co.,Ltd.Introduces that the orifice plate flowmeter designed,manufactured and calibrated according to the national standard does not need real-flow calibration,has high accuracy,simple structure and low manufacturing cost,but the pressure loss is the largest in all standard throttling devices,and is not suitable for the situation of low pressure loss.The standard orifice plate is widely used in petroleum,chemical,metallurgical,electric power and other industries.Industry.
孔板流量計使用正確的流速
Orifice Flowmeter Uses Correct Flow Velocity
為使測量的流量有足夠的準確度。例如孔板前氣流有旋轉(zhuǎn)、偏流、渦流而使孔板產(chǎn)生的差壓發(fā)生誤差。平息這些不正常流動最簡單的辦法就是延長管子的長度，這就是孔板流量計前后必須有一定直線段的原因。
In order to make the flow measurement accurate enough.For example,the differential pressure produced by orifice plate is erroneous due to the rotation,deviation and eddy current of air flow in front of orifice plate.The easiest way to alleviate these abnormal flows is to extend the length of the pipe,which is why the orifice flowmeter must have a certain straight line before and after.
也與不正常氣流的形狀有關(guān)。直角拐彎處一般應(yīng)有810個管徑的直線段長度才能安裝孔板，直線段長度和流量孔板的孔徑、孔板型式有關(guān)?？装搴笠残枰?5個的管徑的直線段。如果不正常氣流是某種旋轉(zhuǎn)氣流，例如管子轉(zhuǎn)彎時有切向流速存在這時直線段長度必須延長到1520直徑長才能裝流量孔板。
It is also related to the shape of abnormal airflow.The length of straight section with 810 diameters at right corner should be used to install orifice plate.The length of straight section is related to the orifice diameter and orifice plate type of flow orifice plate.A straight section of 45 diameters is also required behind the orifice plate.If the abnormal flow is a kind of rotating flow,such as tangential flow velocity when the pipe is turning,the length of the straight line section must be extended to 1520 diameter in order to install the flow orifice.
配合各種差壓計或差壓變送器可測量管道中各種流體的流量?？装辶髁坑嫻?jié)流裝置包括環(huán)室孔板，RFLG系列孔板流量計是測量流量的差壓發(fā)生裝置。噴嘴等。孔板流量計節(jié)流裝置與差壓變送器配套使用，可測量液體、蒸汽、氣體的流量，廣泛應(yīng)用于石油、化工、冶金、電力、輕工等部門。
The flow of various fluids in the pipeline can be measured with various differential pressure gauges or differential pressure transmitters.The orifice plate flowmeter throttling device includes ring chamber orifice plate.RFLG series orifice plate flowmeter is a differential pressure generating device for measuring flow.Nozzle and so on.The orifice plate flowmeter throttling device matches with differential pressure transmitter,which can measure the flow of liquid,steam and gas.It is widely used in petroleum,chemical,metallurgical,electric power,light industry and other departments.
當(dāng)它流經(jīng)管道內(nèi)的節(jié)流裝置時，充滿管道的流體。流束將在節(jié)流裝置的節(jié)流件處形成局部收縮，從而使流速增加，靜壓力低，于是節(jié)流件前后便產(chǎn)生了壓力降，即壓差，介質(zhì)流動的流量越大，節(jié)流件前后產(chǎn)生的壓差就越大，所以孔板流量計可以通過測量壓差來衡量流體流量的大小。這種測量方法是以能量守衡定律和流動連續(xù)性定律為基準的，并能進行溫度、壓力自動補償?shù)男乱淮髁坑?，智能?jié)流裝置（孔板流量計）集流量、溫度、壓力檢測功能于一體。該孔板流量計采用先進的微機技術(shù)與微功耗新技術(shù)，功能強，結(jié)構(gòu)緊湊，操作簡單，使用方便。
When it flows through the throttling device in the pipeline,it fills the pipeline with fluid.The beam will shrink locally at the throttle part of the throttle device,thus increasing the velocity of flow and lowering the static pressure.Pressure drop will occur before and after the throttle part,that is,pressure difference.The larger the flow rate of the medium,the greater the pressure difference between the front and back of the throttle part.So orifice plate flowmeter can measure the flow rate by measuring the pressure difference.This measurement method is based on the law of energy conservation and the law of flow continuity,and can automatically compensate for temperature and pressure.Intelligent throttle device(orifice flowmeter)integrates the functions of flow,temperature and pressure detection.The orifice plate flowmeter adopts advanced computer technology and new technology of micro power consumption.It has strong function,compact structure,simple operation and convenient use.
特點：
簡單、牢固，節(jié)流裝置結(jié)構(gòu)易于復(fù)制。性能穩(wěn)定可靠，使用期限長，價格低廉孔板計算采用國際標(biāo)準與加工。
全部單相流皆可測量，孔板流量計應(yīng)用范圍廣部分混相流亦可應(yīng)用即可投用標(biāo)準型節(jié)流裝置無須實流校準。
Characteristics:
Simple and firm,the structure of throttle device is easy to replicate.Stable and reliable performance,long service life,low-cost orifice plate calculation using international standards and processing.
All single-phase flow can be measured.The orifice flowmeter can be used for a wide range of miscible flow.The standard throttling device can be put into use without real-flow calibration.
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