LWQ系列气体涡轮流量计使用手册
LLQ型腰轮说明书(2)
其中： ---标准状况下的体积流量（Nm3/h） ---当时实际工作状况下的体积流量（m3/h） P---当时管道中气体的实际绝对压力，若计量过程中压力有波动，则为 管道中气体实际平均绝对压力（Pa） P=+B ---当时压力计读出的气体平均表压（Pa） B---当时当地的大气压力 T---当时管道中气体的实际绝对温度（K），若计量过程中温度有波 动，则为管道中气体实际平均绝对温度 T=t+273.15K t---当时温度计读出的气体平均摄氏温度（℃） 七、智能流量积算仪功能 7.1智能流量积算仪内部构成由温度、压力检测模拟通道、流量传感器 通道以及微处理单元组成,并配有外输出各种信号接口。智能流量积算 仪中的CPU按照气态方程进行温压补偿，并自动进行压缩因子修正，气 态方程如下： 上式中：——未经修正的体积流量（m3/h）
一、概述 气体腰轮流量计作为容积式计量仪表已有一百多年的历史，以其精 度高、量程范围宽、体积小重量轻，安装维修方便、使用可靠、耐久的 使用寿命等特点，广泛应用于天然气、煤制气、惰性气体、空气等气体 的流量计量，是国内外城市燃气、油田化工，科学研究等部门理想的流 量计量装置。 二、工作原理 LLQ系列气体腰轮流量计，主要由壳体、共轭转子和计数装置等部 件构成。装于计量室内的一对共轭转子在流通气体的出入口压差（P 入>P出）作用下,通过精密加工的调校齿轮使轮子保持正确的相对位置.转 子间、转子与壳体、转子与墙板间保持最佳工作间隙，实现了连续的无 接触密封。转子第转动一周，则输出四倍计量室有效容积的气体，转子 的转数通过磁性密封联轴装置及减速机构，传递到积算指示计数器，从 而显示输出气体的累计体积量。其计量过程和工作原理如图1所示（图 中仅表示了四分之一周期）。
图3过渡管加工图 表2
LLQ(Z)系列气体(智能)罗茨流量计使用说明...
4.6.3 输入信号 流量信号：(0◆～5)kHz脉冲信号，Vpp≥2.5V。 温度信号：由◆温度传感器输出的阻值信号。 压力信号：由◆压力传感器输出的数字信号。
.0级 .2Q0max1～Qmax: .0%;±1min～Q0.2Qmax: .0% ±2 .5级 .20Qmax1～Qmax: .5%; ±m1in～Q0.2Qmax: .0% ±3
：未特殊注明注产品按1.5级出厂，其余精确度等级在订货时特别说明。
4.6 附件电气性能指标 . Z体型积修正仪a电气性能
24 24 24 24
体罗茨流量气计是精确测量气体流量的仪表，基于容积式测量原理，用于精确计量流经封闭管道的气体总量。 流量计基型由罗茨流量传感器和附件（二次表）两部分组成。 可测气体
于测量天然适气、 城市煤气、 丙烷、 氮气、 工业惰性气体等非腐蚀性气体。 主要应用场合
饮、 宾馆等餐行业的燃气商业结算，输配管网燃气计量，燃气调压站计量，工业和民用锅炉等燃气计量，也 可用作标准流量计。
电路组成，并配有外输信号接口，其工作原理见图4。从各传感器送来的多路信号经转换处理后由微处理器按照 气态方程代入公式运算，实现就地显示和多种信号远传。
3
Vo — 标准状态下— 的体积量(Nm )；
3
—
————————
V
—
工作状态下的体积量(m )；
P=Pa+Pg 流量计压力检测点处的绝对压力，由压力传感器检测或取机内定值设定(kPa)；
接口，其工作原理见图5。流量信号经转换处理后由微处理器按照气态方程代入公式运算，实现就地显示和多种 信号远传。
(产品管理)LWQ系列气体涡轮流量计产品说明书-无纸记录仪有纸记录
（产品管理）LWQ系列气体涡轮流量计产品说明书-无纸记录仪有纸记录□燃气计量专用仪表□油气回收系统专用仪表□始动流量低，可达0.5m3/h，适合贸易结算□高精确度，壹般可达±1.5%R、±1.0%R□重复性好，短期重复性可达0.05%-0.2%□温度、压力实时补偿，直接显示标准状态下流量概述——————————————LWQ型气体涡轮流量传感器是吸取了国内外流量仪表先进技术经过优化设计，综合了气体力学、流体力学、电磁学等理论而自行研制开发的新壹代高精度、高可靠性的气体精密计量仪表，具有出色的低压和高压计量性能，多种信号输出方式以及对流体扰动的低敏感性，广泛适用于天然气、煤制气、液化气、轻烃气等气体的计量。
该类涡轮流量产品本身不具备现场显示功能，仅将流量信号以脉冲信号的方式远传输出。
仪表价格低廉，集成度高，体积小巧，特别适用于和二次显示仪、PLC、DCS等计算机控制系统配合使用。
该类涡轮流量计均为防爆产品，防爆等级为：ExdIIBT6。
产品特点——————————————·优质合金涡轮，具有更高的稳流和耐腐蚀作用·进口优质专用轴承，使用寿命长·计量室和通气室隔绝，保证了仪表的安全性·流量范围宽（Qmax/Qmin≥20:1)，重复性好，精度高（可达1.0级），压力损失小，始动流量低，可达0.6m3/h·仪表具有防爆及防护功能，防爆标志为ExdⅡBT6、ExiaⅡCT6，防护等级为IP65技术参数——————————————2.测量范围及工作压力公称通径型号标准量扩展耐压安装方式DN25 LWQ-25□——W3 0.5-4 4.0 法兰（螺纹）——W4 0.7-7 4.0——W5 1.5-15 4.0S1 3-30 W1 1.5-30 4.0S2 4-40 W2 2-40 4.0DN40 LWQ-40□S1 5-50 W1 2.5-50 4.0 法兰（螺纹）S2 8-80 W2 4-80 4.0DN50 LWQ-50□S1 10-100 W1 5-100 4.0 法兰S2 15-150 W2 8-150 4.0 法兰DN65 LWQ-65□S 15-200 W 10-200 1.6 法兰DN80 LWQ-80□S 15-300 W1 10-300 1.6 法兰W2 15-350 1.6 法兰DN100 LWQ-100□S 20-400 W1 15-400 1.6 法兰W2 20-500 1.6 法兰DN125 LWQ-125□S 20-800 W1 18-800 1.6 法兰W2 20-900 1.6 法兰DN150 LWQ-150□S 50-1000 W1 25-1000 1.6 法兰W2 50-1200 1.6 法兰DN200 LWQ-200□S 150-2000 W 80-2500 1.6 法兰DN250 LWQ-250□S 200-3000 W 150-3500 1.6 法兰DN300 LWQ-300□S 250-4000 W 200-4000 1.6 法兰仪表分类——————————————1．按仪表功能分类LWQ系列气体涡轮流量计可分为3大类，即：□气体涡轮流量传感器/变送器□智能壹体化气体涡轮流量计□智能温压补偿壹体化气体涡轮流量计2．功能说明■气体涡轮流量传感器/变送器该类涡轮流量产品本身不具备现场显示功能，仅将流量信号远传输出。
LWQ系列气体涡轮流量计产品说明书无纸记录仪有纸记录
□燃气计量专用仪表□油气回收系统专用仪表□始动流量低，可达0.5m3/h，适合贸易结算□高精确度，一般可达±1.5%R、±1.0%R□重复性好，短期重复性可达0.05% - 0.2%□温度、压力实时补偿，直接显示标准状态下流量概述——————————————LWQ型气体涡轮流量传感器是吸取了国内外流量仪表先进技术经过优化设计，综合了气体力学、流体力学、电磁学等理论而自行研制开发的新一代高精度、高可靠性的气体精密计量仪表，具有出色的低压和高压计量性能，多种信号输出方式以及对流体扰动的低敏感性，广泛适用于天然气、煤制气、液化气、轻烃气等气体的计量。
该类涡轮流量产品本身不具备现场显示功能，仅将流量信号以脉冲信号的方式远传输出。
仪表价格低廉，集成度高，体积小巧，特别适用于与二次显示仪、PLC、DCS等计算机控制系统配合使用。
该类涡轮流量计均为防爆产品，防爆等级为：ExdIIBT6。
产品特点——————————————·优质合金涡轮，具有更高的稳流和耐腐蚀作用·进口优质专用轴承，使用寿命长·计量室与通气室隔绝，保证了仪表的安全性·流量范围宽（Qmax/Qmin≥20:1)，重复性好，精度高（可达1.0级），压力损失小，始动流量低，可达0.6m3/h·仪表具有防爆及防护功能，防爆标志为ExdⅡBT6、ExiaⅡCT6，防护等级为IP65技术参数——————————————1．基本参数：表1仪表口径及连接方式25、40、50、80、100、150、200、250采用法兰连接25、40可采用螺纹连接精度等级±1.5%R、±1%R量程比1:10；1:20；1:30仪表材质表体：304不锈钢；叶轮：防腐ABS或优质铝合金；转换器：铸铝被测介质温度（℃）-30℃～+80℃环境条件介质温度：-30℃～+80℃，相对湿度5％～90％，大气压力86～106Kpa输出信号三线制脉冲频率信号，低电平≤0.8V 高电平≥8V供电电源+12VDC 、+24VDC（可选）信号传输线STVPV3×0.3传输距离≤1000mLWQ系列气体涡轮流量计LWQ gas tuibine flow meter信号线接口内螺纹M20×1.5防爆等级ExdIIBT6防护等级IP652.测量范围及工作压力注1：表2中“标准量程”中标示的测量范围为通用测量范围；（即适用于：LWQ-N/A/B/C/D）表2 公称通径型号标准量扩展耐压安装方式DN25 LWQ-25□——W3 0.5-4 4.0 法兰（螺纹）——W4 0.7-7 4.0——W5 1.5-15 4.0S1 3-30 W1 1.5-30 4.0S2 4-40 W2 2-40 4.0DN40 LWQ-40□S1 5-50 W1 2.5-50 4.0 法兰（螺纹）S2 8-80 W2 4-80 4.0DN50 LWQ-50□S1 10-100 W1 5-100 4.0 法兰S2 15-150 W2 8-150 4.0 法兰DN65 LWQ-65□S 15-200 W 10-200 1.6 法兰DN80 LWQ-80□S 15-300 W1 10-300 1.6 法兰W2 15-350 1.6 法兰DN100 LWQ-100□S 20-400 W1 15-400 1.6 法兰W2 20-500 1.6 法兰DN125 LWQ-125□S 20-800 W1 18-800 1.6 法兰W2 20-900 1.6 法兰DN150 LWQ-150□S 50-1000 W1 25-1000 1.6 法兰W2 50-1200 1.6 法兰DN200 LWQ-200□S 150-2000 W 80-2500 1.6 法兰DN250 LWQ-250□S 200-3000 W 150-3500 1.6 法兰DN300 LWQ-300□S 250-4000 W 200-4000 1.6 法兰仪表分类——————————————1．按仪表功能分类LWQ系列气体涡轮流量计可分为3大类，即：□气体涡轮流量传感器/变送器□智能一体化气体涡轮流量计□智能温压补偿一体化气体涡轮流量计2．功能说明■气体涡轮流量传感器/变送器该类涡轮流量产品本身不具备现场显示功能，仅将流量信号远传输出。
LW系列涡轮流量仪表产品使用说明书
LW系列涡轮流量仪表产品使用说明书目录一、概述 (2)二、 LWBY型液体涡轮流量传感器 (2)三、LWBY型液体涡轮流量变送器 (8)四、LWBY型现场显示涡轮流量计 (9)五、运输、贮存 (11)六、开箱及检查 (11)七、订货须知 (11)八、常见故障和排除 (12)LW系列涡轮流量仪表一、概述LW系列涡轮流量仪表包括LWGY型液体涡轮流量传感器、LWBY型液体涡轮流量变送器和LWSY型现场显示涡轮流量计等,属于速度式流量仪表。
本系列仪表适用于清洁或基本清洁的单项液体的测量，单独或相关设备配套，可用来测量封闭管道中的体积流量或总量。
具有结构简单、轻巧、精确度高、复现性好、反应灵敏、安装维护使用方便等特点，广泛应用于石油、化工、供水、食品、制药及科研试验等行业，是流量计量和节能的理想仪表。
二、LWGY型液体涡轮流量传感器LWGY型液体涡轮流量传感器是LW系列涡轮流量仪表中的基本产品,它将管道中液体的流量转换成电脉冲信号、并经过显示仪表或计算机系统处理来完成对管道中液体流量的测量或总量计量。
1结构特征与工作原理1.1结构特征：传感器主要有传感组件、信号检测器和放大器组成，（见图1）。
其轴承系统为硬质合金，提高耐磨性、保证产品精度；其中：放大器分两线制和三线制两处形式。
1.2工作原理当流体流经仪表时，推动表内叶轮旋转，然后通过叶轮与信号检测器之间的磁耦合，将流体的流速转换为电脉冲信号输出，通过放大器放大整形并传输给显示仪表，即达到对流体的体积流量或总量的测量目的。
在一定的流量范围内，脉冲频率f与流经传感器的液体的体积流量Q成正比。
流量方程式为：Q=f/K式中：f—脉冲频率K—传感器的仪表系数【1/L】由“校验单”给出。
2.基本参数及性能标准2.1本传感器执行专业标准（JB/T9246-1999涡轮流量传感器）2.3 使用环境：环境温度 -20～+55℃相对温度 5%～95%大气压力 86～106Kpa2.4被测流体温度普通型 -20～+120℃防爆型 -20～70℃2.5 防爆标志：dⅡBT52.6 输入信号:两线制输出输出低电平I≈3mAOL≈13mA(方波)输出高电平IOH负载电阻R(包括线路阻抗)在100～500Ω范围内（根据所配置的显示仪表或其它接收装置输入信号的要求，选择合适的R值.）三线制输出:V≥5V (方波)OP-P2.7电源供电两线制:+24VDC三线制:+12VDC～＋24VDC2.8传输距离:1Km3.连接结构及尺寸：3.1 螺纹连接结构见图2，连接尺寸见表23.2 法兰连接结构见图3，连接尺寸见表2法兰结构及尺寸执行（JB79-59,JB81-59,JB82-59）标准.4.安装通常情况下传感器应为水平安装,正常的管线配置如图41.入口2.阀门3.过滤器4.消气器5.整流器6.涡轮流量传感器7.后直管段8.旁通管段图4 系统配置图图中各部分的作用分述如下:消失器：用来消除流体中的游离气体,避免游离气体占有的体积造成测量误差。
LWGY涡轮流量计说明书
LWGY基本型涡轮番量传感器（LWGYA型涡轮番量变送器）（LWGYB型涡轮番量计）（LWGYC型涡轮番量计）使用说明书目录一、概括02二、 LWGY基本型涡轮番量传感器02三、 LWGYA型涡轮番量变送器07四、 LWGYB型涡轮番量计08五、 LWGYC型涡轮番量计09六、 LWGYD型涡轮番量计09七、维修和常有故障22八、运输、储存22九、开箱注意事项22十、订货须知23一、概括LWGY 系列涡轮番量传感器 （以下简称传感器） 鉴于力矩均衡原理， 属于速度式流量仪表。
传感器拥有构造简单、轻盈、精度高、复现性好、反响敏捷，安装保护使用方便等特色。
宽泛用于石油、化工、冶金、供水、制药、环保等行业。
传感器与显示仪表配套使用，合用于丈量关闭管道中无腐化，无纤维、颗粒等杂质，粘度-6 2小于 5× 10 m/s 的液体介质。
二、 LWGY 基本型涡轮番量传感器1．工作原理液体介质流经传感器壳体， 因为叶轮的叶片与流向形成特定的角度， 流体的冲力使叶片拥有转动力矩， 战胜摩擦力矩和流体阻力以后叶片旋转， 在力矩均衡后转速稳固，转速与流速成正比，因为叶片有导磁性，它处于信号检测器的磁场中， 旋转的叶片切割磁力线， 周期性的改变着线圈的磁通量， 进而使线圈两头感觉出电脉冲信号。
信号经过放大器的放大整形， 形成有必定幅度的连续的矩形脉冲波， 可传输至显示仪表， 显示出流体的刹时流量或总量。
在必定流量范围内， 脉冲频次 f 与流经传感器的流体的刹时流量 Q 成正比，流量方程为：Q 3600fk式中：f ——脉冲频次 [Hz] ；k——传感器的仪表系数[1/m 3] 或 [1/L] ；Q ——流体的刹时流量 3或 [L/h] ；[m /h] 3600 ——换算系数；每台传感器的仪表系数 k 略有不一样， 这是由制造厂家经过流量装置实流校验得出，打印于合格证书中。
2．基本参数LWGY □LWGYLWGYA类 型LWGYBLWGYC公 称 通径□□ 说 明基本型： 12VDC 供电，脉冲信号输出，高电平≥ 8V 、 低电平≤。
LWGY涡轮流量计 使用说明书
LWGY系列涡轮流量计使用说明书lnstruction Manual目录LWGY系列涡轮流量计说明书（1-14）一、概述 (2)二、产品特点 (2)三、工作原理 (2)四、主要技术参数………………………………………………3-4五、外形尺寸……………………………………………………4-6六、安装要求……………………………………………………6-7七、使用要求……………………………………………………7-8八、LWGYA型涡轮流量传感器介绍 (8)九、LWGYB型涡轮流量计介绍 (9)十、LWGYC型涡轮流量计介绍 (9)十一、LWGYD型涡轮流量变送器介绍..............................10-11 十二、LL-05型智能流量积算器操作说明........................12-14 十三、维修和常见故障 (15)十四、运输、储存 (15)十五、开箱注意事项 (16)十六、订货须知 (16)十七、使用期限 (16)插入式流量计说明书（15-27）一、概述 (17)二、产品特点 (18)三、原理及基本公式 (18)四、主要参数……………………………………………………18-20五、结构及各零件名称（B型）…………………………………20-23六、确定传感器仪表系数KDS的方法…………………………23-24七、维修 (24)八、配套显示仪表………………………………………………24-28九、一般故障及排除方法………………………………………28-30十、保修 (30)一、概述LWGY 涡轮流量计是本厂采用国外先进技术生产制造的，是液体计量最理想的流量计之一。
它具有结构简单、精确度高、安装维修使用方便等特点。
该产品广泛用于石油、化工、冶金、供水、造纸、环保、食品等领域，可靠测量水、纯水、自来水、无杂质的污水、柴油、汽油和低粘度的原油等液体的体积流量。
与具有定量功能的显示仪表配套使用，可以进行自动定量控制、上下限报警等用途。
英文版气体涡轮流量计说明书0501
LWGQ Gas turbine flowmeter使用说明书湖北南控仪表科技有限公司（鄂H制00000124号）1．The generalizabilityLWGQ series gas turbine flowmeter is learned the flow meter at home and abroad advanced technology optimized design, the comprehensive gas mechanics, fluid mechanics, electromagnetism theory by itself to set temperature, pressure, flow sensor is developed and in the integration of intelligent flow totalizer.especially for a new generation of high precision, high reliability gas precision measuring instrument, has a good performance of low pressure and high pressure measurement, multiple way signal output and low sensitivity to the fluid disturbance, is widely used in natural gas, coal gas, liquefied gas and light hydrocarbon gas and gas metering.According to the product by the national anti-explosive products quality inspection department GB3836.2000 the explosive gas environment with electrical equipment part 1: general requirements ", GB3836.2-2000 "explosive gas environment with electrical equipment part 2: flameproof" d ", "and GB3836.4-2000" explosive gas environment with electrical equipment part 4: "I" intrinsically safe "standard inspection, explosion-proof marks for Exd ⅡBT6 (flameproof), Exia ⅡCT6 (Ann). Applicable to contain A and B ⅡⅡ, ⅡC T1 ~ T4 explosive gas mixture temperature classes 0 (only this type) 1, 2, area for the dangerous sites.2．Product features⏹High quality alloy turbine, have higher steady flow and corrosion effect⏹Imported high quality bearing, long service life⏹Measuring room from ventilation chamber, guarantee the safety of the instrument⏹Can be detected by measuring the temperature, pressure, and flow of the gas, can flow automatic trackingcompensation, and displays a standard condition (Pb = 101.325 KPa, Tb = 101.325 K) of gas volume cumulant; Can be real-time query temperature and pressure values⏹Wide range of flow rate （Q max/Q min≥20:1), good repeatability, high precision (up to 1.0), small pressure loss,initiating flow rate is low, can reach 0.6m3/h⏹Intelligent instrument coefficient more nonlinear correction⏹Built-in pressure, temperature sensors, high safety performance, compact structure, beautiful shape⏹Instruments with explosion protection and protective functions, marks for Exd ⅡBT6, Exia ⅡCT6, protectiongrade reaches IP65⏹System low power consumption, section 3.2 V10AH lithium batteries can be use more than 3 years in a row⏹Instrument coefficient, the cumulative flow value power lost decade is not lost3. The working principle ofWhen the fluid flows into the flow of time, under the action of air inlet special-purpose integrated rectifier rectifier and accelerate, due to the turbine blades and the direction of flow at an Angle, the turbine rotational torque, after overcoming friction torque and fluid resistance moment, the turbine to spin. Within the scope of a certain flow, turbine rotating angular velocity is proportional to the fluid volume flow. According to the principle of electromagnetic induction, the use of magnetic sensor signal from coaxial rotation during induction out with fluid volume flow is proportional to the pulse signal, the signal after amplification, filtering, plastic with temperature and pressure sensor signal into micro processing unit of intelligent flow totalizer.especially for processing, and the volume of a gas flow rate and total directly display on the LCD screen.4．Technical parameters：4．1 The basic parameters：4．1．1Table 1specifications Nominal diameter（mm）Flow range（m3/h）Pick up traffic（m3/h）Pressure of work（MPa）Type of installationLWGQ-25 25 （1"） 2.5-25 0.6 4.0 Flange (thread)LWGQ-40 40（1.5"）5-50 0.8 4.0 Flange (thread)LWGQ-50 50（2"）10-100 1 4.0 FlangeLWGQ-80 80（3"）20-400 2.5 1.6 FlangeLWGQ-100 100（4"） 32-650 2.5 1.6 FlangeLWGQ-150 150（6"）50-1000 4 1.6 FlangeLWGQ-200 200（8"）130-2500 8 1.6 FlangeLWGQ-250 250（10"）200-4000 12 1.6 FlangeLWGQ-300 300（12"） 320-6500 16 1.6 Flange4．1．2 Level of accuracy: 1.0, 1.54．1．3Conditions of use：◆The environment temperature：-30℃～+60℃；◆The atmospheric pressure：86KPa～106KPa；◆Medium temperature：-30℃～+80℃；◆Relative humidity：5%～95%4．2Electrical performance indicators：Table 2specifications Display and output Power supply LWGQ- N Low voltage pulse level 1 v or less, high level 5 v, or three wire system External power DC12V-24VLWGQ－A (4 ~ 20 mA) standard linear analog signal corresponds to (0 ~ Qmax) m3 / h standardvolume flow, two wire systemExternal power DC24VLWGQ－B With multipoint correction precision, at the same time show the instantaneous flow andcumulative flow double row liquid crystal display (LCD), as follows：Q XXXX Four instantaneous flow rate（m3/h）XXXXXXXX Eight cumulative flow（m3）Note: the total flow rate since 00.000000 counting, automatic expanding display precision,maximum down to 999999.99. Accumulative total flow rate value can be zero, instrumentcoefficient, the cumulative flow value power lost decade is not lost.3.2 V10AH lithium batteriesLWGQ－C In LWGQ - B (the scene display type) on the basis of adding 4-20 madc current output External power DC24VLWGQ－D In LWGQ - B (the scene display type) with temperature and pressure sensors, flow forautomatic compensation correction arithmetic for different condition. Can query, such astemperature, pressure, battery at the same time. Can output high frequency, low frequencyvoltage pulse signal, and 4-20 madc two wire current signal.3.2 V10AH lithium battery orDC24V power supply4．3Model system：Table 3Model Explain LWGQ □□□Meter Type N Basic, pulse outputA Current output typeB The display typeC Display output type (scene shows + current output)D Temperature, pressure compensation typeMeter diameter25 25mm 40 40mm 50 50mm 65 65mm 80 80mm 100 100mm 150 150mm 200 200mm 250 250mm 300 300mmSensor material NBasic material, high quality aluminum alloy. (the highest pressure: 1.0MPa)S Stainless steel material. (high pressure anti-corrosion type)For example, the model is: LWGQ - C - 50 s of the gas turbine flowmeter, said：Meter diameter of 50 mm, display, output way of live shows, output current sensor is made of stainless steel high pressure gas turbine flow meter.5．Overall dimensionsFlow meter appearance is shown in figure 1, the specific sizes are shown in table4Figure 1Note ： as shown in figure 1 as temperature pressure compensation type instrument appearance. With all the model instrument sensor part of the machine and high caliber size.Table 4Model Nominaldiameter mm L D H K n d Bolt specification Conventional pressure MPaLWGQ-25 25 150 115 236 85 4 φ14 M12×50 4.0LWGQ-40 40 150 150 266 110 4 φ18 M16×55 LWGQ-50 50 150 165 285 125 4 φ18 M16×60 LWGQ-65 65 240 185 300 145 4 φ18 M16×65 1.6LWGQ-80 80 240 200 319 160 8 φ18 M16×70 LWGQ-100 100 300 220 337 180 8 φ18 M16×80 LWGQ-150 150 450 285 395 240 8 φ22 M20×80LWGQ-200 200 500 340 448 295 12 φ22 M20×90 LWGQ-250 250 500 403 495 355 12 φ26 M24×90 LWGQ-30030050046054841012φ26M24×1006．Selection of flowmeter6.1 When users in the selection, should according to the nominal pipe pressure, medium to high pressure, medium temperature, medium composition, flow range and signal output requires reasonable selection of flowmeter type specification.6.2 In order to make the use of the flowmeter performance is the best, the use of the flowmeter flow range should be within the scope of Qmax (20% ~ 20%) is more appropriate.6.3 Meter factory of signal output mode: working condition of the pulse signal output (three-wire system), the standard traffic signal output or RS - 485 communication (IC) output. If you want have other output function, when ordering, please .6.4 Selection of instanceKnown to the actual working pressure of a gas pipeline pressure) (table 0.8 MPa to 1.2 MPa, mediumtemperature range is 5 ℃ ~ + 40 ℃, the throughput of 3000 ~ 8000 nm3 / h (standard of traffic), without taking into consideration under the condition of gas composition, requirement of the specifications of the flowmeter.Analysis: the description given in table 1 flow range for the working condition of flow range, and in this case theflow range is given in the standard condition flow range, therefore, must according to the gas side Mr. Cheng will flow in the conversion of flow condition, and then choose the appropriate diameter. Gas equation is as follows ： 2Z gb bb bF C Q =ZZ T P T P Q =Q······ Type in the ：Q b —— Standard of flow ，m 3/h ；Q —— Working condition of traffic ，m 3/h ；C * —— Scaling factor. (look-up table, a table is only for type selection reference when conversion)gbz Z Z =F —— Gas compressibility factor, according to China national petroleum corporation SY/T 6143-1996 standard.The data in table b is for reference only, the data according to the true relative density of natural gas Gr = 0.600, nitrogen and carbon dioxide mole fraction were calculated as 0.00, when the medium pressure below 0.5 MPa, Zb/deal in mid-december, = 1.00 estimate. Calculation :：① when the pressure of the medium low temperature (0.8 MPa), high (+ 40 ℃) when (in the gas peak), should have the biggest case volume flow (can not consider the effect of FZ, model selection of the local atmospheric pressure of 101.325 kPa)：Namely 965.472=293.1540+273.15×800+101.325101.325×8000=T T ·P P Q =Q b b maxb max m 3/h Estimation of or use the following formula (type, C * as the conversion factor, check appendix table a)：960.38=8.338000=C Q =Q bmax max m 3/h ② Medium pressure was highest (1.2 MPa), the lowest temperature (5 ℃) (in gas trough), should have aminimum standard of volume flow ：Namely 213.51=293.155273.15×1200+101.325101.325×3000=Q min m 3/hEstimation of or use the following formula ： 214.3=14.03000=C Q =Q bmin min m 3/h Selection ：learn from the above estimates that want to choose the flowmeter its working flow range is (213.5 ~ 965.472m3 / h), by table 1 check, choose the meter models for LWGQ - 150.According to the gas equation of scaling factor C * valuesTable aC * P T MPa0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65(℃)-20 1.27 1.70 2.30 2.87 3.34 4.02 4.59 5.16 5.73 6.30 6.87 7.44 8.02 8.59 -15 1.25 1.70 2.26 2.82 3.38 3.94 4.50 5.06 5.62 6.18 6.74 7.30 7.86 8.42 -10 1.22 1.66 2.21 2.76 3.31 3.86 4.41 4.96 5.51 6.60 6.61 7.16 7.71 8.26 -5 1.20 1.63 2.17 2.71 3.25 3.79 4.33 4.87 5.41 5.95 6.49 7.03 7.57 8311 0 1.18 1.60 2.13 2.66 3.19 3.72 4.25 4.78 5.31 5.84 6.37 6.90 7.43 7.96 51.16 1.572.09 2.613.13 3.654.17 4.695.21 5.736.25 6.777.29 7.81 10 1.14 1.55 2.06 2.57 3.08 3.59 4.10 4.61 5.12 5.63 6.14 6.66 7.17 7.68 15 1.12 1.52 2.02 2.52 3.03 3.53 4.03 4.53 5.03 5.54 6.04 6.54 7.04 7.54 20 1.10 1.49 1.99 2.48 2.97 3.47 3.96 4.45 4.95 5.44 5.93 6.43 6.92 7.42 25 1.08 1.47 1.95 2.44 2.92 3.41 3.89 4.38 4.86 5.35 5.84 6.32 6.81 7.29 30 1.06 1.44 1.92 2.40 2.88 3.35 3.83 4.31 4.78 5.26 5.74 6.22 6.69 7.17 35 1.05 1.42 1.89 2.36 2.83 3.30 3.77 4.24 4.71 5.18 5.65 6.12 6.58 7.05 40 1.03 1.40 1.86 2.32 2.78 3.25 3.71 4.17 4.63 5.095.566.02 6.48 6.9445 1.01 1.38 1.83 2.29 2.74 3.19 3.65 4.10 4.56 5.01 5.47 5.92 6.38 6.83 50 1.00 1.35 1.80 2.25 2.70 3.15 3.59 4.04 4.49 4.94 5.38 5.83 6.28 6.73C* T P MPa0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.20 1.40 1.60 2.00 2.50 3.00 4.00(℃) -20 9.16 9.73 10.3 10.9 11.4 12.0 12.6 14.9 17.2 19.4 24.0 29.7 35.4 46.9 -15 8.98 9.54 10.1 10.7 11.2 11.8 12.3 14.6 16.8 19.1 23.6 29.1 34.8 46.0 -10 8.81 9.36 9.91 10.5 11.0 11.6 12.1 14.3 16.5 18.7 23.1 28.6 34.1 45.1 -5 8.65 9.19 9.72 10.3 10.8 11.3 11.9 14.0 16.2 18.4 22.7 28.1 34.5 44.3 0 8.49 9.20 9.55 10.1 10.6 11.1 11.7 13.8 15.9 18.0 22.3 27.6 32.9 43.4 5 8.33 8.86 9.38 9.90 10.4 10.9 11.5 13.5 15.6 17.7 21.9 27.1 32.3 42.1 10 8.19 8.70 9.21 9.72 10.2 10.7 11.3 13.3 15.3 17.4 21.5 26.6 31.7 41.9 15 8.05 8.55 9.05 9.55 10.1 10.6 11.1 13.1 15.1 17.1 21.1 26.1 31.1 41.2 20 7.91 8.40 8.90 9.39 9.88 10.4 10.9 12.8 14.8 16.8 20.7 25.7 30.6 40.5 25 7.78 8.26 8.75 9.23 9.72 10.2 10.7 12.6 14.6 16.5 20.4 25.2 30.6 39.8 30 7.65 8.12 8.60 9.08 9.56 10.0 10.5 12.4 14.3 16.2 20.1 24.8 30.1 39.1 35 7.52 7.99 8.46 8.93 9.40 9.87 10.3 12.2 14.1 16.0 19.7 24.4 29.6 38.5 40 7.40 7.87 8.33 8.79 9.25 9.71 10.3 12.0 13.9 15.7 19.4 24.0 29.1 37.9 45 7.29 7.47 8.20 8.65 9.11 9.56 10.3 11.8 13.7 15.5 19.1 23.7 28.6 37.3 50 7.17 7.62 8.07 8.52 8.96 9.11 9.86 11.7 13.4 15.2 18.8 23.3 27.8 36.7Note:：1．The value in the table to the local atmospheric pressure of 101.325 KPa to calculate；2．Pressure for the tableFz values of gas compressibility factorTable a tFz ℃）P（M P a）-20 -15 -10 -5 0 5 10 15 20 250.50 1.0088 1.0083 1.0078 1.0073 1.0069 1.0065 1.0061 1.0058 1.0054 1.00511.00 1.0180 1.0169 1.0159 1.0149 1.0140 1.0132 1.0124 1.0117 1.0110 1.01031.50 1.0276 1.0258 1.0242 1.0227 1.0213 1.0200 1.0188 1.0176 1.0166 1.01562.00 1.0375 1.0351 1.0328 1.0307 1.0287 1.0269 1.0252 1.0237 1.0222 1.02092.50 1.0479 1.0446 1.0416 1.0389 1.0363 1.0340 1.0318 1.0298 1.0280 1.02633.00 1.0587 1.0546 1.0508 1.0473 1.0441 1.0412 1.0385 1.0360 1.0337 1.03163.50 1.0700 1.0649 1.0602 1.0560 1.0521 1.0485 1.0453 1.0423 1.0396 1.03704.00 1.0818 1.0756 1.0699 1.0648 1.0602 1.0506 1.0521 1.0486 1.0454 1.04254.50 1.0941 1.0866 1.0799 1.0739 1.0685 1.0635 1.0591 1.0550 1.0513 1.04795.00 1.1069 1.0980 1.0902 1.0831 1.0768 1.0712 1.0660 1.0614 1.0571 1.05335.50 1.1201 1.1089 1.1006 1.0926 1.0853 1.0789 1.0730 1.0678 1.0630 1.05876.00 1.0339 1.1218 1.1113 1.1021 1.0939 1.0866 1.0800 1.0741 1.0688 1.06406.50 1.0480 1.1342 1.1222 1.1117 1.1025 1.0943 1.0870 1.0805 1.0746 1.06937.00 1.1624 1.1467 1.1332 1.1214 1.1111 1.1020 1.0943 1.0867 1.0803 1.07457.50 1.1770 1.1593 1.1442 1.1311 1.1197 1.1097 1.1008 1.0929 1.0859 1.07968.00 1.1917 1.1719 1.1551 1.1407 1.1282 1.1172 1.1075 1.0990 1.0913 1.08457．Install and use7．1 The installation of the flowmeter • Before installation, the pipe must purge clean to prevent residual iron affect the normal operation of flowmeter. •Before installation, the use of tiny air blows the turbine, the turbine can flexible rotation, no random noise, counter rotating is normal, uninterrupted card lag phenomenon, the flowmeter can be used to install. • Flow meter in the middle of the flange and pipe flanges to add sealing washer.•Meter shall be equipped with filters, temperament is dirty places should be equipped with oil filter, before you place an order, can order to me at the same time, it is strictly prohibited to filter and flowmeter directly connected. • Meter shall be added by the valve before, during, and after installation. • Flange joint pipe Canon place there should be no protrusions.•Flow meter installed, it is strictly prohibited in the import and export directly for welding flange, so as not to burn out flowmeter internal parts. •Meter should be installed in easy maintenance, strong electromagnetic interference and mechanical vibration and thermal radiation effects ； •Flowmeter is unfavorable with frequent interruptions in the flow and strong pulsation flow or pressure pulsation of the occasion ； •Flow meter outdoor installation, should be the upper cover, to prevent rain water immersion and strong sunlight affect the service life of the meter ； •Flow meter can be installed in horizontal or vertical, the fluid flow direction should be consistent with the direction of the logo on the shell, should guarantee the upstream of the flow meter is not less than 10 dn straight pipe, after the table is not less than 5 dn straight pipe. •In order not to affect the normal fluid transportation, it is suggested that according to the figure 2 by-pass pipe installation, must close the by-pass pipe valve when normal use.tFz ℃）P （M P a ）30 35 40 45 50 55 60 65 70 75 0.50 1.00481.0046 1.0043 1.0041 1.0039 1.0036 1.0034 1.0032 1.0031 1.0029 1.00 1.0097 1.0092 1.0087 1.0082 1.0077 1.0073 1.0069 1.0065 1.0061 1.0058 1.50 1.0147 1.0138 1.0130 1.0123 1.0116 1.0109 1.0103 1.0097 1.0091 1.00862.00 1.0197 1.0185 1.0174 1.0164 1.0154 1.0145 1.0137 1.0129 1.0121 1.0114 2.50 1.0247 1.0231 1.0217 1.0204 1.0192 1.0181 1.0170 1.0160 1.0151 1.01423.00 1.0297 1.0278 1.0261 1.0245 1.0230 1.0216 1.0203 1.0191 1.0180 1.0169 3.50 1.0347 1.0325 1.0305 1.0286 1.0268 1.0252 1.0236 1.0222 1.0208 1.01964.00 1.0397 1.0372 1.0348 1.0326 1.0305 1.0286 1.0269 1.0252 1.0236 1.0222 4.50 1.0447 1.0418 1.0391 1.0366 1.0343 1.0321 1.0301 1.0282 1.0264 1.02475.00 1.0497 1.0464 1.0434 1.0405 1.0379 1.0355 1.0332 1.0311 1.0291 1.0272 5.50 1.0547 1.0510 1.0476 1.0444 1.0415 1.0388 1.0363 1.0339 1.0317 1.02976.00 1.0596 1.0555 1.0517 1.0483 1.0450 1.0420 1.0393 1.0367 1.0343 1.0320 6.50 1.0644 1.0599 1.0558 1.0520 1.0485 1.0452 1.0422 1.0394 1.0368 1.03437.00 1.0692 1.0643 1.0598 1.0557 1.0519 1.0483 1.0451 1.0420 1.0392 1.0365 7.50 1.0738 1.0686 1.0637 1.0593 1.0552 1.0514 1.0478 1.0446 1.0415 1.03878.001.07481.07271.06751.06271.05831.05431.05051.04701.04381.0407旁通管线前直管段≥10D N流量计过滤器气流入口后直管段≥5D N 图2 旁通管道安装图•In pipeline construction, should consider to install the expansion pipe or bellows, lest cause serious tension or the flowmeter ；• Should ensure that pipe connected to the flow meter of the entry and exit coaxial, and prevent the washer and weld, into the pipe or you will disrupt the flow profile ；• When external power is adopted, the meter must be reliable grounding, but not with the high voltage system common ground; Pipeline installation or maintenance may, at the time of the ground and flowmeter lap welding system ；• Pipeline installation of sealing pressure testing, flowmeter pressure sensor should be paid attention to are the highest pressure (that is, the maximum pressure of medium) on the calibration certificate, so as not to damage the pressure sensor.7.2 The use of the flowmeter 7．2．1 Matters needing attention •The maximum leakage pressure in low pressure table ：≤1.0Mpa ，t emperature pressure compensation type leakage pressure no more than three times the upper limit value of the pressure sensor. High pressure casing according to 1.2 times the rated flow pressure leak detection. •After installation leak test and installation shall comply with the following rules ： ① Turn off gas valve and the inlet valve.② Slightly open vent valve, and then slowly open the inlet valve, make the table start slowly, then slowly open the vent valve, make the reach normal operation state, to prevent sudden start, damage to the core.③ At the time of stopping air, need to close the vent valve, then close the inlet valve, each time you start all should abide by the rules.•Flow meter installed after use, not to touch the bolt, screw, nut fasteners, such as to avoid danger such as leakage, damage.•Flow meter movement (temperament clean) should be once every six months for cleaning maintenance;(temperament is dirtier) should be cleaning maintenance once a month.•If the movement after breakdown maintenance, to be put into use, sealing test should be carried out according to the maximum pressure first. And to the oil in the note number T4 precision instrument movement or transformer oil. 7．2．1 LWGQ(basic) wiring instructions：V + red line, green line for power V -, yellow line as the signal wire, metal wire is shielded wire.7．2．2 LWGQ-A (type) output current: two wire output current；7．2．3LWGQ-B\Ctype gas turbine operating instructions1、Panel displayOn the instantaneous flow, discharge cumulative flow; "Settings" indicating instrument SettingsThe top right corner there is hidden dry reed pipe is used to reset the cumulative flow, the function can be through the parameter configuration2、Parameter tablesymbol name Value range address noteoA 0～9999 100(H) Note 1 passwordParameters of group 1 (password by "code" : menu password)symbol name Value range The default value address note in-d 0～4 3 ：0000.0 110(H) Note 2 The instantaneous flow decimal point positionP-d 0～4 4 ：00000. 111(H) Note 2 The flow coefficient of the decimal point positionPLuA 60～99999 360 112(H)A number of pulse flow metering unitF-H 0～1 1 113(H) Note 3 The instantaneous flow metering unit of timeFLtr 1～20 1 114(H) Note 4 Digital filtering time constantcHo 0～99999 50 115(H)Small signal thresholdin-A －999.99～999.99 unit：Hz 116(H)Zero valueFi 0.0001～9.9999 1.0000 117(H)Full revised(Not to take effect)c-b 0：oFF∕1：on 0：OFF 118(H) Note 5 Line function to chooseParameters in group 2 (password by "code" : menu password)symbol name value range the default value address note cLr1 0：oFF∕1：on 1 ：ON 120(H) Note 8“▼”key manually resetcLr2 0：oFF∕1：on 1 ：ON 121(H) Note 8 Dry reed pipe manually resetcodE 0～9999 1111 122(H) Note 1 Menu passwordLov 0～99999999 0 123(H)Initial value(Not to take effect)Group 3 parameters (password by "code" : menu password)symbol name value range address note Line 1 point measurements0~99999 130(H)Line 1 point measurements0~99999 131(H)Line 2 point measurements0~99999 132(H)Line 3 point measurements0~99999 133(H)Line 3 point measurements0~99999 134(H)Line 4 point measurements0~99999 135(H)Line 4point measurements0~99999 136(H)Line 5 point measurements0~99999 137(H)Line 5 point measurements0~99999 138(H)Line 6 point measurements0~99999 139(H)Line 6point measurements0~99999 13A(H)Line 6 point measurements0~99999 13B(H)Line 7 point measurements0~99999 13C(H)Line 7point measurements0~99999 13D(H)Line 8point measurements0~99999 13E(H)Line 8point measurements0~99999 13F(H)Note 1: password is set with level 1 menu password parameters "code" is the same, can enter each parameter Settings; See the back of the instructions detailed setting method.Note 2: 0 ~ 4 sequence corresponds to：0.0000，00.000，000.00，0000.0，00000.Note 3: 0, 1, respectively: l/m ，m3/hNote 4: used to overcome the signal showed fluctuations caused by unstable, the larger the value set, the stronger the effect, but the slower reflect to the change of the input signal.Note 5:0 (OFF) : close polyline correction; 1 (on) : use line correctionNote 6: only when c - b set to on, can enter line correction parameter setNote7: 0 (OFF) : banned manual reset; 1 (on) : allow manual reset3、Parameter Settings：（in-d）――The instantaneous flow decimal point location selectionAccording to the sensor maximum range to choose from（P-d），（PLuA）――According to the maximum range of the sensor, determine the instantaneous flow instrument showsbottom represent flow value, namely a flow measurement units. Again according to the average flow coefficient, to determine a flow unit of measurement of the pulse number.（F-H）――The instantaneous flow metering unit of timeCan respectively by the hour, minute and unit for cumulative rise, cubic meters,mutual collocation,、closelyrelated with, parameter Settings（FLtr）――Digital filtering time constantUsed to overcome the signal showed fluctuations caused by unstable, the larger the value set, the stronger the effect, but the slower reflect to the change of the input signal.（cHo）――Small signal threshold, the factory is set to 0If the instantaneous flow rate is less than the threshold value, then press 0 processing（in-A）――Zero value, factory Settings is commonly 0（Fi）――Full revised, factory Settings is 1.0000Through zero with revised correction instrument sampling, (of the input pulse meter rarely use this parameter), in which the parameters of "Fi" not to take effect（Lov）――Initial valueCumulative flow after reset or exceed the limit that the starting value, it is not effective4、8Section line operation functionWhen due to the nonlinear error of flow sensor, measurement accuracy can not meet the requirement of the application, can consider to use the 8 section of line operation function of instrument.Will instrument group 1 parameter in parameter is set to 1，open the function of line operation, 8 period ofline of value by ~ 、 and ~ this 16 parameters setting，Sensor data table usually has two forms, one kind is the instantaneous flow rate and frequency table, can be used directly. Another kind is the instantaneous flow and flow coefficient table, need to flow in the conversion coefficient of frequency, such as the flow coefficient of the 20 m3 / h when 17810 pulses/frequency of 20 x 17810÷3600 = 98.94 Hz~ ：Said from low to high frequency values of each point~ ：Said with ~ various frequency values corresponding to the instantaneous flow valuesFrequency values of the decimal point position set by parameters of group 1, should pay attention to theinstantaneous flow values measuring unit of time should be consistent with the parameter selection of5、The number of unit impulse SettingsPulse output flow sensor generally provides maximum range and the average flow coefficient, flow and the flow coefficient under different flow rate or the corresponding pulse frequency. Due to the nonlinear sensor has certain, when high precision required, 8 section polyline function available instrument.When using the instrument of 8 section polyline function, has nothing to do with，parameters.8 of general application, do not use the instrument line function, according to the maximum range and the average flow coefficient and parameters.First of all, based on maximum range, determine the instantaneous flow instrument shows bottom represent flow value, namely a flow measurement units. Again according to the average flow rate coefficient, to determine a flow unit of measurement of the pulse number.Example: the flow sensor range from 0.1 to 0.1 m3 / h, flow coefficient for an average of 19932 pulses/m3Instrument the instantaneous flow rate by ☐.☐☐☐m3∕h according to the flow metering unit 1 is 0.001 m3, corresponding to the pulse number is 19932×0.001＝19.93≈19.93 Should be set＝ 00.00， ＝ 19.936、The key that NameExplainThe measured value display window• Liquid crystal display various instrument information The operation key Set the button●• Measurement mode, press enter setup state•Settings, press, according to the code into the correspondingparameter set or return to the measurement stateleft-click◄• Invalid measurement condition• Settings, press into the current state parameter changes • Modify current parameters change state ，Mobile changes Identify buttonMOD• Invalid measurement condition• Set state, the order to choose the other parameters•The current parameter modification conditions, deposited in themodified parameter valueIncrease the button▲• Invalid measurement condition• Current parameter modification condition, increase the type parametervalues or change SettingsReduce the button▼•Measurement condition, the total flow rate reset (related to theparameters)•Current parameter modification condition, reduce the type parameter values or change Settings7、Parameter setup instructions Password method① Press ● key, enter setup status, the line shows②Press ◄ enter a state of parameter modification,in ▲ button 、 ▼ button 、 ◄ button Cooperation will discharge the password value is amended as "level 1 menu password" or "secondary menu password" parameter values ③Press the MOD button, the password set up, right into the corresponding menu groups ★ Password when the power on the instrument will be reset automatically 8、Parameter setting method① Prior to set the parameters according to the above method to set the password, the password is set correctly, the instrument will enter the corresponding menu groups② Press the MOD order select need to set parameters, display parameters on the symbol, discharge shows the current parameter values③ Press ◄ enter a state of parameter modification, flashing for modification④ Move through the ◄ key changes, ▲ button 、 ▲ button 、Increase or decrease in value, the parameter is modified to desired values⑤ Press MOD keys, deposited in the modified parameter values, and go to the next parameter Repeat step ② ~ ⑤，the other parameters can be set up this groupEnter the Settings for 1 minute without key, the instrument will automatically return to the state of measurement and password reset To exit setup:In the condition of setting, press ● key until the return to measuring condition。
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700
403
表4
H
K
236
85
266
110
285
125
300
145
319
160
337
180
395
240
448
295
495
355
5
常规耐压
n
d 螺栓规格
MPa
4 φ14 M12×50
4 φ18 M16×55
4.0
4 φ18 M16×60
4 φ18 M16×65
1.6
8 φ18 M16×70
8 φ18 M16×80
35 1.05 1.42 1.89 2.36 2.83 3.30 3.77 4.24 4.71 5.18 5.65 6.12 6.58 7.05
40 1.03 1.40 1.86 2.32 2.78 3.25 3.71 4.17 4.63 5.09 5.56 6.02 6.48 6.94
45 1.01 1.38 1.83 2.29 2.74 3.19 3.65 4.10 4.56 5.01 5.47 5.92 6.38 6.83
该产品经国家防爆产品质检部门按GB3836.2000《爆炸性气体环境用电气设备第 1 部：通用要求》， GB3836.2-2000《爆炸性气体环境用电气设备第 2 部分：隔爆型“d”》和GB3836.4-2000《爆炸性气体环境用电气 设备第 4 部分：本质安全型“i》” 标准检验合格，防爆标志为ExdⅡBT4(隔爆型)、ExiaⅡCT4（本安型）。 适用于含 有ⅡA、ⅡB、ⅡC类T1～T4温度组别爆炸性气体混合物的 0（仅本安型）1、2 区危险场所。
1
0 1.18 1.60 2.13 2.66 3.19 3.72 4.25 4.78 5.31 5.84 6.37 6.90 7.43 7.96 温度 5 1.16 1.57 2.09 2.61 3.13 3.65 4.17 4.69 5.21 5.73 6.25 6.77 7.29 7.81
10 1.14 1.55 2.06 2.57 3.08 3.59 4.10 4.61 5.12 5.63 6.14 6.66 7.17 7.68 (℃) 15 1.12 1.52 2.02 2.52 3.03 3.53 4.03 4.53 5.03 5.54 6.04 6.54 7.04 7.54
LWQ－D
在 LWQ-B（现场显示型）加装温度、压力传感器，对不同状况流量 3.2V10AH 锂电池或外
进行自动补偿修正运算。可同时查询温度、压力、电池电量等数值。 电源 DC24V
可输出高频、低频电压脉冲信号以及 4-20mADC 两线制电流信号。
4．3 型号谱表：
表3
3
型号
说明
LWQ □
□
□
无
C* —— 换算系数；（查表a，表中数据仅供选型换算时参考）
Fz =
Zb Zg
—— 气体压缩因子，按中国石油天然气总公司 SY/T 6143-1996 标准计算。
表b中的数据仅供参考，其数据按天然气的真实相对密度Gr=0.600，氮气和二氧化碳摩尔分数均为 0.00 计
算所得，当介质压力低于 0.5MPa时，均可按Zb/Zg=1.00 估算。
1
4.0
法兰
LWQ-80
80 （3"）
6-200
2.5
1.6
法兰
LWQ-100
100（4"）
8-300
2.5
1.6
法兰
LWQ-150
150（6"）
10-1000
4
1.6
法兰
LWQ-200
200（8"）
18-2500
8
1.6
法兰
LWQ-200
250（10"） 25-3000
12
1.6
法兰
LWQ-300
4．技术参数：
4．1 基本参数：
4．1．1
表1
型号规格
公称通径 （mm）
流量范围 始动流量 工作压力 （m3/h） （m3/h） （MPa）
安装形式
LWQ-25
25 （1"）
2-40
0.6
4.0
法兰（螺纹）
LWQ-40
40 （1.5"）
3-60
0.8
4.0
法兰（螺纹）
LWQ-50
50 （2"）
3-100
-15 1.25 1.70 2.26 2.82 3.38 3.94 4.50 5.06 5.62 6.18 6.74 7.30 7.86 8.42
-10 1.22 1.66 2.21 2.76 3.31 3.86 4.41 4.96 5.51 6.60 6.61 7.16 7.71 8.26
-5 1.20 1.63 2.17 2.71 3.25 3.79 4.33 4.87 5.41 5.95 6.49 7.03 7.57 831
计算：① 当介质压力最低（0.8MPa）、温度最高（+40℃）时(处于供气峰期），应具有最大标况体积流量（选
型时可暂不考虑FZ的影响，当地大气压取 101.325kPa）：
6
即
Qmax
= Qbmax
Pb P
T
101.325 273.15 + 40
· = 8000 ×
×
= 965.472
Tb
101.325 + 800 293.15
传感器材质
S
不锈钢材质。（高压防腐型）
例如，型号为：LWQ－C－50S 的气体涡轮流量计，表示： 仪表口径为 50mm，显示、输出方式为现场显示加电流输出，传感器材质为不锈钢的高压气体涡轮流量计。
5．外形尺寸
流量计外形如图 1 所示，具体尺寸见表 4
4
图1 注：图 1 所示为温压补偿型仪表外形。
同口径所有型号仪表传感器部分以及整机高度尺寸一致。
LWQ－B
XXXXXXXX 八位累计流量（m3）
3.2V10AH 锂电池供电
注：累计流量自 00.000000 开始计数，自动扩大显示精度，最大记
至 999999.99。累计流量值可清零，仪表系数、累计流量值掉电十
年不丢。
LWQ－C
在 LWQ-B（现场显示型）基础上加装 4－20mADC 电流输出
外电源 DC24V
8 φ22 M20×80
12 φ22 M20×90
12 φ26 M24×90
LWQ-300 300
800
460
548
410
12 φ26 M24×100
6．流量计的选型
6.1 用户在选型时，应根据管道公称压力、介质最高压力、介质温度、介质组分情况、流量范围及信号输出要
求合理选择流量计的型号规格。
6.2 为使流量计的使用性能最佳，流量计的使用流量范围应在（20%～80%）Qmax范围内比较合适。
300（12"） 30-4000
16
1.6
法兰
2
4．1．2 精度等级：1.0 级、1.5 级
4．1．3 使用条件：
◆ 环境温度：-30℃～+60℃； ◆ 大气压力：86KPa～106KPa；
◆ 介质温度：-30℃～+80℃； ◆ 相对湿度：5%～95%
4．2 电气性能指标：
表2
型号规格
显示、输出方式
6.3 流量计出厂时的信号输出方式：工况脉冲信号输出（三线制）、标准流量信号（IC 卡）输出或 RS-485 通
讯输出。若要求有其它输出功能，请在订货时说明。
6.4 选型实例
已知某一供气管线的实际工作压力为（表压）0.8MPa～1.2MPa，介质温度范围为-5℃～+40℃，供气量
为 3000～8000Nm3/h(标况流量)，在不考虑天然气组分的情况下，要求确定流量计的规格型号。
1
3. 工作原理
当流体流入流量计时，在进气口专用一体化整流器的作用下得到整流并加速，由于涡轮叶片与流体流向成一 定角度，此时涡轮产生转动力矩，在克服摩擦力矩和流体阻力矩后，涡轮开始旋转。在一定的流量范围内，涡轮 旋转的角速度与流体体积流量成正比。根据电磁感应原理，利用磁敏传感器从同轴转动的信号轮上感应出与流体 体积流量成正比的脉冲信号，该信号经放大、滤波、整形后与温度、压力传感器信号一起进入智能流量积算仪的 微处理单元进行运算处理，并把气体的体积流量和总量直接显示于 LCD 屏上
50 1.00 1.35 1.80 2.25 2.70 3.15 3.59 4.04 4.49 4.94 5.38 5.83 6.28 6.73
C* 压力
MPa
温度
0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.20 1.40 1.60 2.00 2.50 3.00 4.00
C*
压力
MPa
温度
0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65
-20 1.27 1.70 2.30 2.87 3.34 4.02 4.59 5.16 5.73 6.30 6.87 7.44 8.02 8.59
2．产品特点
优质合金涡轮，具有更高的稳流和耐腐蚀作用 进口优质专用轴承，使用寿命长 计量室与通气室隔绝，保证了仪表的安全性 可检测被测气体的温度、压力和流量，能进行流量自动跟踪补偿，并显示标准状态下
（Pb=101.325KPa,Tb=293.15K）的气体体积累积量；可实时查询温度压力数值 流量范围宽（Qmax/Qmin≥20:1)，重复性好，精度高（可达 1.0 级），压力损失小，始动流量低，可达 0.6m3/h 智能化仪表系数多点非线性修正 内置式压力、温度传感器，安全性能高、结构紧凑、外形美观 仪表具有防爆及防护功能，防爆标志为 ExdⅡBT4、ExiaⅡCT4， 防护等级为 IP65 系统低功耗工作，一节 3.2V10AH 锂电池可连续使用 3 年以上 仪表系数、累计流量值掉电十年不丢