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Gas flowmeter

ZW-LLQ series Gas flowmeter Is a volume type measuring instrument, intelligent integration design, t…

Description：

、產(chǎn)品概述：">Productoverview:

ZW-LLQ series Gas flowmeter ，智能一體化設(shè)計

，溫壓傳感器內(nèi)置表體

。">Is a volume type measuring instrument, intelligent integration design, the temperature and pressure sensor inside the body. ，并進(jìn)行白動補(bǔ)償和壓縮因子修正，直接顯示氣體的標(biāo)準(zhǔn)瞬時體積流量和標(biāo)準(zhǔn)體積總量

。">Can the temperature and pressure dynamic detection medium, and automatic compensation and compression factor correction, directly display the amount of gas standard instantaneous volume flow and standard volume. ，無須打開流量計的前蓋進(jìn)行參數(shù)設(shè)置，提高操作的安全性

。">Optional infrared remote control device, there is no need to open the front cover of the meter set parameters, improve operation safety. ，防止無關(guān)人員修改參數(shù)。">The password protection function, to prevent unauthorized personnel to modify the parameters. ，并存屏幕上顯示報警標(biāo)志提醒用戶及時更換電池

。">When the battery voltage is low output low voltage alarm signal, both displayed on the screen to remind the user to replace the battery in time alarm sign.

Two, work principle:

，推動轉(zhuǎn)子旋轉(zhuǎn)

，每轉(zhuǎn)動一周就有定體積流量從出口排出，這就是旋轉(zhuǎn)定排量工作原理

。">ZW-LLQ series <strong> of gas roots flow meter</strong> is when the measured gas into the inlet end, drives the rotor to rotate, rotates a circle will be discharged from the export volume, this is the rotating fixed displacement principle. ，實現(xiàn)流量檢測或計量的目的。">The rotation of the rotor by magnetic coupler transmission output rotational frequency, to achieve the purpose of measuring or testing flow. ，多種不同的結(jié)構(gòu)形式

，可滿足不同的用戶要求。">At the same time, the structure of different forms, can meet the different requirements of users.

，由機(jī)械計數(shù)器直接顯示工況累積量

，同時由流量補(bǔ)償儀實現(xiàn)溫度、壓力修正

，直接檢測顯示介質(zhì)的溫度

、壓力、工況體積流量和總量

、標(biāo)況體積流量和總量檢測

。">Dual display type: at the same time with mechanical counter and flow compensation apparatus by the mechanical counter display condition accumulation, at the same time by the flow compensation instrument for temperature and pressure correction, direct detection showed that the medium temperature, pressure, flow, and the total working volume and total volume flow condition detection standard.

Three, application:

。">ZW-LLQ series <strong> of gas roots flow meter</strong> can be used to measure the industrial production and urban living with natural gas. 。">The first is the current main products are oil and natural gas city measurement and measurement of trade. 、******氣

、沼氣等其他氣體流量。">Can also be used to measure the gas, liquefied gas, gas, gas and other gas flow. 、化工

、電力、冶金

、機(jī)械

、輕工

、制藥和城市居住生活中等需要測量氣體流量的地方。">Applicable to the petroleum, chemical, electric power, metallurgy, machinery, light industry, pharmaceutical and city living medium to the gas flow measurement.

、主要特點：">Four, main features:

、準(zhǔn)確度高，重復(fù)性好

。">1, high precision, good repeatability. ，無接觸旋轉(zhuǎn)，良好的油潤滑

，確保流量計精度不變

，工作壽命長。">The internal rotor by the precision machining and balance test, contact free rotation, good lubricating oil, ensure the accuracy of flowmeter unchanged, long working life.

、流量計前后不需要直管段

，可以安裝在環(huán)境狹窄的場合

。">2, before and after the flowmeter does not require straight pipe, can be installed in a narrow environment.

、始動流量小，量程比寬

，適合于計量符合變動大的氣體流量

。">3, small starting flow, wide range, suitable for measurement of gas flow with large changes.

，性能穩(wěn)定

，壽命長。">4, the measuring accuracy is not affected by the pressure and flow changes, stable performance, long service life.

、通用性好

，所有羅茨流量傳感器均可使用通用的附件。">5, good versatility, all accessories can be used in general roots flow sensor.

、配置RS-485通訊接口和IC卡專用信號集中器配套

，并可通過GPRS/CDMA、internet

、網(wǎng)絡(luò)7

、組成遠(yuǎn)程數(shù)據(jù)采集機(jī)監(jiān)控系統(tǒng)，便于數(shù)據(jù)的集中采集和實時管理

。">6 configuration, RS-485 communication interface and IC card dedicated signal concentrator supporting, and through the GPRS/CDMA, Internet, 7, Monitor System network composed of remote data acquisition machine, centralized management for data acquisition and real time.

、電路采用表貼安裝工藝，結(jié)構(gòu)緊湊

、抗干擾能力強(qiáng)

、可靠性高。">8, surface mount circuit in the installation process, compact structure, strong anti-interference ability and high reliability.

、采用高性能微處理器和現(xiàn)代數(shù)字濾波技術(shù)

，軟件功能強(qiáng)大

，性能******。">9, a high performance microprocessor and digital filtering technology, powerful software, superior performance.

、采用浮點運(yùn)算和五段儀表系數(shù)自動修正

，并有故障自診斷和報警功能。">10, the floating-point and 5 meter coefficient and automatic correction, fault diagnosis and alarm function.

、采用微功耗高新技術(shù)

，內(nèi)、外電源供電工作

，整機(jī)功耗低

，僅憑一節(jié)2#3.6VDC鋰電池供電，可連續(xù)工作五年以上

。">11, micro power technology, internal and external power supply, low power consumption, with only one 2#3.6VDC lithium battery, can work continuously for more than 5 years.

、就地顯示流量值，并帶多種信號輸出功能

。">12, local display flow values, and multiple signal output function.

、采用高對比度的液晶顯示器，可顯示標(biāo)準(zhǔn)累積流量

、標(biāo)準(zhǔn)體積流量

、工況體積流量百分值、介質(zhì)溫度

、14

、壓力值和電池用量百分量，并帶中文提示符

。">13, with high contrast LCD display, can display the standard cumulative flow, standard volume flow, volume flow conditions, the percentage of medium temperature, 14, pressure and battery usage percentage, and with Chinese prompt.

、具有實時數(shù)據(jù)存儲功能，防爆標(biāo)志為ExibllCT4 GB

。">15, with real-time data storage function, explosion-proof symbol is ExibllCT4 GB.

、流量計外殼保護(hù)等級為IP65。">16, shell protection grade is IP65.

、技術(shù)參數(shù)：">Fifth, technical parameters:

、測量流體：天然氣、煤氣

、惰性氣體

、空氣等氣體；">1, measurement of fluid: natural gas, gas, inert gas, air and other gases;

、口徑系列：DN25

、32、40

、50

、80

、100、150

、200

；">2, DN25, 32, diameter series: 40, 50, 80, 100, 150, 200;

；">3, the accuracy level: ordinary type intelligent type: + 1.5% + 1.0%;

、重復(fù)性：小于基本誤差限******值的1/3；">4, the repeatability is less than the absolute value of basic error limit: 1/3;

、量程比：20

； 1-120：1（zui寬）；">5, 20; 1-120:1 (range: Zui width);

、電器接口：M20X1.5

；">6, electrical interface: M20X1.5;

；">7, protection grade: IP65;

、防爆等級：ExiaIICT4；">8, explosion-proof grade: ExiaIICT4;

、殼體材質(zhì)：鋁合金

。">9, shell material: Aluminum Alloy.

、使用環(huán)境條件：">Sixth, the use of environmental conditions:

、環(huán)境溫度：-30℃-+70℃；">1, environmental temperature: -30 -+70 DEG c;

、介質(zhì)溫度：-30℃—+85℃

；">2, medium temperature: -30 degrees C - +85;

；">3, relative humidity: 5% ~ 95%;

、大氣壓力：70kPa-106kPa；">4, atmospheric pressure: 70kPa-106kPa;

、公稱壓力：0.5

、1.OMPa；">5, nominal pressure: 0.5, 1.OMPa;

、管道連接：法蘭連接

；">6, pipe connection: flange connection;

、垂直

；">7, installation: horizontal and vertical;

、DC18V—DC30V

；">8, power supply: 3.6V lithium battery, DC18V - DC30V;

、直管道要求：上游3D下游2D，調(diào)節(jié)閥除外（D為流量計口徑）

；">9, straight pipe requirements: upstream downstream 3D 2D valve (D meter diameter) except;

、通訊協(xié)議：RS485/RS232C；">10, communication protocol: RS485/RS232C;

、輸出信號：4～20mA標(biāo)準(zhǔn)電流工況

、脈沖信號、電池欠壓報警信號

、流量報警信號

；">11, the output signal: 4 ~ 20mA current mode, pulse signal, the battery voltage alarm signal, alarm signal flow;

、抗±500V 10ms的強(qiáng)干擾沖擊

、防止±24V電源誤接、RS-485通訊口具有瞬變電壓抑制功能

，防雷擊

、抗靜電放電沖擊、可抗500V

，10ms強(qiáng)干擾沖擊

；">12, electromagnetic compatibility: the power in the double isolation and anti 10ms + 500V + 24V to prevent the impact of strong interference, power supply, communication port has the wrong connection RS-485 transient voltage suppression, anti lightning, anti shock, anti electrostatic discharge 500V, 10ms interference impact;

、下限報警

、關(guān)閥報警和電池欠壓報警；">13, control signal output: upper and lower limit alarm, alarm valve and battery voltage alarm;

、實時數(shù)據(jù)存貯功能：起停記錄

、日記錄、定時時間間隔記錄

。">14, real-time data storage function: stop recording, recording, recording time interval diary.

、安裝要求：">Seven, installation requirements:

，機(jī)械振動小

，灰塵少且遠(yuǎn)離熱源的場所。">1, environmental conditions: no corrosive fluids, small mechanical vibration, less dust and place away from heat. ，還應(yīng)有符合規(guī)定的環(huán)境

。">For a volume correction instrument of intelligent flowmeter, should also comply with the provisions of the environment.

。">2, the ambient temperature: not more than -20, the range of +8O DEG C.

、管道條件：在安裝流量計前，管道須***進(jìn)行清洗和吹掃，清除一切雜物

、銹蝕和污垢

。">3 conditions: in the installation of pipeline flowmeter before pipeline should be cleaned and purge, remove all debris, rust and dirt.

。 ">Connecting pipe should be in accordance with the import and export of the same caliber flowmeter axis, may not have bulges protruded convex wall in the pipeline.

，充分考慮工作溫度引起的管道應(yīng)力。">Flow meter should take the stress free installation, considering pipe work caused by temperature stress.

、配套設(shè)備有以下幾方面：">Eight, equipment are as follows:

、為了減小流量計的附加誤差，可以選用與流量汁配套的自動溫度補(bǔ)償器和自動壓力補(bǔ)償器

。">1, in order to reduce the error of additional meter, can automatic temperature compensator selection and flow of juice and automatic pressure compensator.

、為了便于控制和管理，可以選用帶各種信號輸出功能的流量計以及與之配套的積算儀

、記錄儀和控制器以及專用計算機(jī)設(shè)備等

。">2, in order to facilitate control and management, can choose a flowmeter with various signal output function and integrating instrument, with the support of the recorder and the controller and special computer equipment etc..

，可以選用流量計配套附加設(shè)備

，如為了濾除流體中的雜物，必要時在流量計前安裝適用的過濾器或沉渣器

；為了防止壓力波動

，必要時在流量計上游安裝緩沖罐、膨脹室安全閥或氣體保護(hù)裝置

；為了流量計安全運(yùn)行

，系統(tǒng)還應(yīng)配備可靠的壓力和流量控制設(shè)備，使系統(tǒng)壓力和流量計都不至于超過流量計能承受的上限值

。">3, in order to make the flowmeter normal safe operation, can use additional equipment such as flowmeter, in order to filter the fluid in the debris, to install the appropriate filter or sediment in front of flowmeter when necessary; in order to prevent the installation of pressure fluctuation, buffer tank, expansion chamber safety valve or gas protection device in the flowmeter when necessary; for the safe operation of the flowmeter also, the system should be equipped with reliable pressure and flow control equipment, the system pressure and flow are not exceed the upper limit value of flowmeter.

，為了使選用的流量計能高準(zhǔn)確度計量

、高可靠性地工作

，選用時應(yīng)考慮的主要因素有：">In summary, in order to make use of the flowmeter can high accuracy measurement, high reliability, the main factors that should be considered when choosing a:

，是連續(xù)測量還是間歇測量

。">1, the flow rate range is continuous or intermittent measurement measurement.

、壓力的變化范圍

，zui高的工作壓力和允許的壓力損失。">Range 2, temperature, pressure, Zui high work pressure and allow the pressure loss.

、被測介質(zhì)的種類和特點

，如黏度、腐蝕性、夾帶物數(shù)量及尺寸等

。">3, the measured characteristics and types of media, such as viscosity, corrosion resistance, entrainment quantity and size etc..

、要求的準(zhǔn)確度，是否要求對示值進(jìn)行溫度壓力補(bǔ)償

。">4, the required accuracy, whether the requirements for showing the value of temperature and pressure compensation.

、現(xiàn)場安裝條件。">5, site installation conditions.

、維護(hù)和運(yùn)行費(fèi)用

。">6, maintenance and operation cost.

。">7, check meter method etc..

、安裝注意事項：">Nine, installation notes:

，出氣兩封口

；">1, before installation shall not open the inlet flow, the outlet seal;

，羅茨流量計應(yīng)放在zui后安裝

；">2, when the pipe is installed on many devices, should be installed in the flowmeter zui;

，安裝前須***對管道進(jìn)行高壓吹掃

；">3, where conditions permit, the pipeline must be high pressure purge before installation;

，毛刺進(jìn)行細(xì)心清除

；">4, installed at the interface with an iron pin, careful removal of burr;

，對測量介質(zhì)進(jìn)行過濾;測量液體時

，若其中含有氣體，流量計前選裝消氣裝置

，確保流量計的測量精度

；">5, the meter must be installed in front of the filter, filter media measurement; measurement of liquid, if containing gas, optional getter device flowmeter, ensure the measuring precision of flowmeter;

，水平豎直安裝均可

，豎直安裝上進(jìn)下出，下進(jìn)上出不受影響

，但流量計不得反裝

，反裝時，流向相反

，腰輪反轉(zhuǎn)

，因間正反轉(zhuǎn)隙設(shè)計不同會損壞腰輪

；">6, installation modes, horizontal vertical installation can be installed vertically progress under the lower upper is not affected, but the meter shall not be reversed, anti loaded, opposite directions, waist wheel reversal, because the rotation between different gap design will damage the waist wheel;

，但須預(yù)留足夠的安裝過濾裝置的距離

；">7, on the lower straight pipe section, but must set aside to install filtering device enough distance;

，當(dāng)測量介質(zhì)的粘稠度過大時

，影響流量計測量精度；">8, the waist wheel rotation by fluid pressure is the force of viscous medium, when the measurement is too high, affect the measuring precision of flowmeter;

，能使流量計達(dá)到更好的測量精度

。">To avoid the above points, the measurement precision can achieve better flowmeter.

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