淮安华立仪表罗茨流量计

技术资料TechnicalInformation系列气体腰轮流量计使用说明书JLQLWGY液体涡轮流量计目录一、概述······························································································································1二、产品特点······················································································································1三、技术性能指标·············································································································23.1流量计结构······································································································23.2腰轮流量计（机械）工作原理······································································23.3智能流量转换器的工作原理··········································································33.4基本参数··········································································································43.5始动流量及流量上限······················································································5四、仪表选型······················································································································6五、外形尺寸······················································································································75.1外形尺寸图······································································································75.2流量计安装尺寸一览表················································································10六、定值补偿型转换器使用操作说明··········································································116.1概述···············································································································116.2工作环境········································································································116.3主要特点········································································································116.4操作说明········································································································12七、温压补偿型转换器使用操作说明··········································································157.1概述···············································································································157.2工作环境········································································································157.3主要特点········································································································157.4操作说明········································································································167.5接线说明········································································································227.6注意事项········································································································25目录LLQ系列气体腰轮流量计1应用领域：餐饮、宾馆等行业的燃气商业核算，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，也可用作丙烷、氮气、工业惰性气体等各种无腐蚀性气体标准流量计。一、概述智能气体腰轮（罗茨）流量计是集流量、温度、压力检测功能于一体，并能进行温度、压力自动补偿的新一代流量计，该流量计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。流量计基型由腰轮流量传感和流量积算仪（二次表）两部分组成。该流量计采用先进的单片机技术和微功耗高新技术，能对被测介质进行压力机内设置和温度自动跟踪补偿运算，并直接显示标准状态下（P0=101.325kPa，T0=293.15K）的体积总量。本流量计执行中华人民共和国机械行业标准JB/T7385-94《气体腰轮流量计》和本厂企业标准Q/ZCY05-2002《LLQ型气体腰轮流量计》。二、产品特点■精确度高，重复性好。内部转子经精密加工和平衡测试，无接触旋转，良好的油润滑，确保流量计精度不变，工作寿命长。■流量计前后不需要直管段，可以安装在环境狭窄的场合。■始动流量小，量程比宽，适合于计量符合变动大的气体流量。■计量精确度不受压力和流量变化的影响，性能稳定，寿命长。■通用性好，所有腰轮流量传感器均可使用通用的附件。■配置RS-485通讯接口和IC卡专用信号集中器配套，并可通过GPRS/CDMA、internet、电话网络组成远程数据采集机监控系统，便于数据的集中采集和实时管理。■电路采用表贴安装工艺，结构紧凑、抗干扰能力强、可靠性高。■采用高性能微处理器和现代数字滤波技术，软件功能强大，性能优越。■采用浮点运算和五段仪表系数自动修正，并有故障自诊断和报警功能。■采用微功耗高新技术，内、外电源供电工作，整机功耗低，仅凭一节2#3.6VDC锂电池供电，可连续工作五年以上。■就显示流量值，并带多种信号输出功能。■采用高对比度的液晶显示器，可显示标准累积流量、标准体积流量、工况体积流量百分值、介质温度、压力值和电池用量百分量，并带中文提示符。■具有实时数据存储功能，防爆标志为ExibllCT4gb。■流量计外壳保护等级为IP65。系列气体腰轮流量计2三、技术性能指标3.1流量计结构流量计由5个部分组成（见图1）1、智能流量转换器2、流量传感器3、压力传感器4、温度传感器5、气体腰轮流量计（机械）图1流量计结构原理图3.2腰轮流量计（机械）工作原理智能气体腰轮（罗茨）流量计，主要由壳体、共轭转子、计数器和智能流量转换器等部件构成。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转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。转子每转动一周，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，传递到智能流量转换器，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2所示（图中仅表示了四分之一周期）。位置1位置2位置3位置4图2气体腰轮流量计工作原理JLQ系列气体腰轮流量计33.3智能流量转换器的工作原理智能流量转换器由温度和压力检测模拟通道、流量传感器通道以及微处理器单元组成，并配有外输信号接口，输出各种信号。智能流量转换器中的微处理器按照气态方程进行温压补偿，并进行压缩因子修正，气态方程如下：2)(zgnnggngnngagnFTTPPQZZTPTPPQQ×××=×+×=………………………………（1）式中：Qn：标准状态下的体积流量（m3/h）；Qg:工况状态下的体积流量（m3/h）；Pg：流量计压力检测点处的表压（kPa）；Pa：当地大气压（kPa）；Tg：介质的绝对温度（273.15＋t）(K)；t：被测介质温度（℃）；Zn：标准状态下的压缩系数；Zg：工作状态下的压缩系数；Tn：标准状态下的绝对温度（273.15＋20）(K)；Pn：标准大气压（101.325kPa）；P:P=Pa+Pg。注：对于天然气Zn/Zg＝Fz2，Fz称为超压缩因子，本产品按中国石油天然气总公司的标准SY/T6143-1996中的公式进行计算。图3智能流量转换器原理框图JLQ系列气体腰轮流量计43.4基本参数执行标准封闭式管道中气体流量的测量—《气体腰轮流量计》（JB/T7385-94）仪表口径及连接方式25、40、50、65、80、100、125、150、200、250采用法兰连接精度等级±1.5%R（±1%R需特制）*仪表材质表体：铸铝或铸铁；转子：优质铝合金；转换器：铸铝使用条件介质温度：-10℃～+60℃环境温度：-30℃～+60℃相对湿度：5%～90%大气压力：86～106KPa工作电源A.外电源：+24VDC±15%，纹波≤±5%，适用于4-20mA输出、脉冲输出、RS485等B.内电源：1节3.6VDC锂电池，当电压低于2.0时出现欠压指示。整机功耗A.外电源：＜1W；B.内电源：平均功耗≤1W，可连续使用三年以上。输出信号功能①脉冲信号、②4～20mA电流信号、③IC卡控制信号通讯输出功能RS485通讯④实时记录功能⑤起停记录、日记录、定时间间隔记录信号线接口内螺纹M20×1.5或其他防爆等级ExibIICT4防护等级IP65JLQ系列气体腰轮流量计53.5始动流量及流量上限公称通径仪表型号起步流量流量上限压力损失耐压等级精度等级量程比仪表材质(mm)-------（m3/h）（m3/h）（Pa）（Mpa）-------------