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HNLUG系列<a href="http://www.gozillab.com"><span style="color: #000000"><b>蒸汽涡街流量?/b></span></a>主要用于工业管道中蒸汽介质流体的流量测量, 特点是压力损失小,量程范围?精度?在测量工况体积流量时几乎不受流体密度、压力、温度、粘度等参数的影响。无可动机械零件,因此可靠性高,维护量小。仪表参数能长期稳定?span style="color: #ff00ff"><b><span style="color: #ff00ff"><span style="color: #000000"><b>蒸汽涡街流量?/b></span></span></b></span>采用压电应力式传感器,可靠性高,可在-20℃~+250℃的工作温度范围内工作。有模拟标准信号,也有数字脉冲信号输出,容易与计算机等数字系统配套使?是一种比较先进、理想的流量仪表?/p> <p style="text-align: left">一、工作原?br />     在蒸汽流体中设置三角柱型旋涡发生体,则从旋涡发生体两侧交替地产生有规则的旋涡,这种旋涡称为卡门旋涡,旋涡列在旋涡发生体下游非对称地排列?br /> 设旋涡的发生频率为f,被测介质平均流速为 ,旋涡发生体迎流面宽度为d,表体通径为D,即可得到以下关系式?br /> f=SrU1/d=SrU/md 式中U1--旋涡发生体两侧平均流速,m/s?br /> Sr--斯特劳哈尔数?br /> m--旋涡发生体两侧弓形面积与管道横截面面积之?/p> <p style="text-align: left">管道内体积流量qv?br /> qv=πD2U/4=πD2mdf/4Sr                <br /> K=f/qv=[πD2md/4Sr]-1                  <br /> 式中 K--流量计的仪表系数,脉冲数/m3(P/m3)?br /> K除与旋涡发生体、管道的几何尺寸有关外,还与斯特劳哈尔数有关。斯特劳哈尔数为无量纲参数,它与旋涡发生体形状及雷诺数有关,?所示为圆柱状旋涡发生体的斯特劳哈尔数与管道雷诺数的关系图。由图可见,在ReD=2×104?×106范围内,Sr可视为常数,这是仪表正常工作范围?/p> <p style="text-align: left">斯特劳哈尔数与雷诺数关系曲线式中qVn,qV--分别为标准状态下?oC?0oC?01.325kPa)和工况下的体积流量,m3/h?<br /> Pn,P--分别为标准状态下和工况下的绝对压力,Pa?br /> Tn,T--分别为标准状态下和工况下的热力学温度,K?br /> Zn,Z--分别为标准状态下和工况下气体压缩系数?<br /> 由上式可见,VSF输出的脉冲频率信号不受流体物性和组分变化的影响,即仪表系数在一定雷诺数范围内仅与旋涡发生体及管道的形状尺寸等有关。但是作为流量计在物料平衡及能源计量中需检测质量流量,这时流量计的输出信号应同时监测体积流量和流体密度,流体物性和组分对流量计量还是有直接影响的?/p> <p style="text-align: left">    <span style="color: #ff00ff"><b><span style="color: #ff00ff"><span style="color: #000000"><b><a href="http://www.gozillab.com/product/llyb/">蒸汽涡街流量?/a></b></span></span></b></span>便是依据卡门旋涡原理进行封闭管道流体流量测量的新型流量计。因其具有良好的介质适应能力,无需温度压力补偿即可直接测量蒸汽、空气、气体、水、液体的工况体积流量,配备温度、压力传感器可测量标况体积流量和质量流量,是节流式流量计的理想替代产品?br />     为提?span style="color: #ff00ff"><b><span style="color: #ff00ff"><span style="color: #000000"><b>蒸汽涡街流量?/b></span></span></b></span>的耐高温及抗振动性能,我公司新近开发出了HNLUG改进型涡街流量传感器,因其独特的结构和选材使该传感器可在高温(350℃)、强振动?le;1g)的恶劣工况下使用?br /> 在实际应用中,往往最大流量远低于仪表的上限值,随着负荷的变化,最小流量又往往会低于仪表的下限值,仪表并非工作在它的最佳工作段,为了解决这一问题,通常采用在测量处缩径提高测量处的流速,并选用较小口径的仪表以利于仪表的测量,但是这种变径方式必须在变径管与仪表间有长度为15D以上的直管段进行整流,使加工、安装都不方便。我公司研制的纵断面形状为圆弧的LGZ变径整流器,具有整流、提高流速及改变流速分布多重作用,其结构尺寸小,仅为工艺管内径?/3,与涡街流量计作成一体,不仅不需要另外附加一段直管段,还可以降低对工艺管直管段的要求,安装非常方便?br />     为了使用方便,电池供电的就地显示?b><a href="http://www.gozillab.com/product/llyb/zhengqiwojieliuliangji.html">蒸汽涡街流量?/a></b>采用微功耗高新技术,采用锂电池供电可不间断运行一年以上,节省了电缆和显示仪表的采购安装费用,可就地显示瞬时流量、累积流量等。温度补偿一体型<b>涡街流量?/b>还带有温度传感器,可以直接测量出饱和蒸汽的温度并计算出压力,从而显示饱和蒸汽的质量流量。温压补偿一体型带有温度、压力传感器,用于气体流量测量可直接测量出气体介质的温度和压力,从而显示气体的标况体积流量?br /> ◆测量介质: 气体、液体、蒸?br /> ◆口径规?法兰卡装式口径选择 25,32,50,80,100<br /> ◆法兰连接式口径选择 100,150,200<br /> ◆流量测量范?正常测量流速范?雷诺?.5×104?×106;气??0m/s; 液体0.5?m/s<br /> ◆测量精?1.0?1.5?br /> ◆被测介质温?常温–25℃~100?br /> ◆高?ndash;25℃~150?-25℃~250?br /> ◆输出信?脉冲电压输出信号 高电??0V 低电?.7?.3V<br /> ◆脉冲占空比?0%,传输距离?00m<br /> ◆脉冲电流远传信?4?0 mA,传输距离?000m<br /> ◆仪表使用环?温度:-25℃~+55?湿度:5?0% RH50?br /> ◆材?不锈? 铝合?br /> ◆电?DC24V或锂电池3.6V<br /> ◆防爆等?本安型iaIIbT3-T6<br /> ◆防护等?IP65</p> <p style="text-align: left"><b>蒸汽涡街流量?/b>产品选型<br />   <table border="1" cellspacing="1" cellpadding="0"> <tbody> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">代号</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">通径</span></div> </div> </td> <td valign="top" width="382" colspan="7"> <div> <div align="center"><span class="he">流量范围?h</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">HN LU-25</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">DN25</span></div> </div> </td> <td valign="top" width="162" colspan="3"> <div> <div align="center"><span class="he">1~10(液体)</span></div> </div> </td> <td valign="top" width="139" colspan="3"> <div> <div align="center"><span class="he">25~60(气体)</span></div> </div> </td> <td valign="top" rowspan="8" width="81"> <div> <div align="center"><span class="he">蒸汽流量请查看说明书,DN300以上推荐使用插入式涡街流量计</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">HN LU-32</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">DN32</span></div> </div> </td> <td valign="top" width="162" colspan="3"> <div> <div align="center"><span class="he">1.5~18(液体)</span></div> </div> </td> <td valign="top" width="139" colspan="3"> <div> <div align="center"><span class="he">15~150(气体)</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">HN LU-40</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">DN40</span></div> </div> </td> <td valign="top" width="162" colspan="3"> <div> <div align="center"><span class="he">2.2~27(液体)</span></div> </div> </td> <td valign="top" width="139" colspan="3"> <div> <div align="center"><span class="he">22.6~150(气体)</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">HN LU-50</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">DN50</span></div> </div> </td> <td valign="top" width="162" colspan="3"> <div> <div align="center"><span class="he">4~55(液体)</span></div> </div> </td> <td valign="top" width="139" colspan="3"> <div> <div align="center"><span class="he">35~350(气体)</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">HN LU-80</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">DN80</span></div> </div> </td> <td valign="top" width="162" colspan="3"> <div> <div align="center"><span class="he">9~135(液体)</span></div> </div> </td> <td valign="top" width="139" colspan="3"> <div> <div align="center"><span class="he">90~900(气体)</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">HN LU-100</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">DN100</span></div> </div> </td> <td valign="top" width="162" colspan="3"> <div> <div align="center"><span class="he">14~200(液体)</span></div> </div> </td> <td valign="top" width="139" colspan="3"> <div> <div align="center"><span class="he">140~1400(气体)</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">HN LU-150</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">DN150</span></div> </div> </td> <td valign="top" width="162" colspan="3"> <div> <div align="center"><span class="he">32~480(液体)</span></div> </div> </td> <td valign="top" width="139" colspan="3"> <div> <div align="center"><span class="he">300~3000(气体)</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">HN LU-200</span></div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">DN200</span></div> </div> </td> <td valign="top" width="162" colspan="3"> <div> <div align="center"><span class="he">56~800(液体)</span></div> </div> </td> <td valign="top" width="139" colspan="3"> <div> <div align="center"><span class="he">550~5500(气体)</span></div> </div> </td> </tr> <tr> <td valign="top" rowspan="27" width="81"> <div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">代号</span></div> </div> </td> <td valign="top" width="382" colspan="7"> <div> <div align="center"><span class="he">功能1</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">N</span></div> </div> </td> <td valign="top" width="382" colspan="7"> <div> <div align="center"><span class="he">无温压补?/span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">Y</span></div> </div> </td> <td valign="top" width="382" colspan="7"> <div> <div align="center"><span class="he">有温压补?/span></div> </div> </td> </tr> <tr> <td valign="top" rowspan="24" width="81"> <div> </div> </td> <td valign="top" width="81"> <div> <div align="center"><span class="he">代号</span></div> </div> </td> <td valign="top" width="301" colspan="6"> <div> <div align="center"><span class="he">输出型号</span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">F1</span></div> </div> </td> <td valign="top" width="301" colspan="6"> <div> <div align="center"><span class="he">4-20mA输出(二线制?/span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">F2</span></div> </div> </td> <td valign="top" width="301" colspan="6"> <div> <div align="center"><span class="he">4-20mA输出(三线制?/span></div> </div> </td> </tr> <tr> <td valign="top" width="81"> <div> <div align="center"><span class="he">F3</span></div> </div> </td> <td valign="top" width="301" colspan="6"> <div> <div align="center"><span class="he">RS485通讯接口</span></div> </div> </td> </tr> <tr> <td valign="top" rowspan="20" width="81"> <div> </div> </td> <td valign="top" width="52"> <div> <div align="center"><span class="he">代号</span></div> </div> </td> <td valign="top" width="250" colspan="5"> <div> <div align="center"><span class="he">被测介质</span></div> </div> </td> </tr> <tr> <td valign="top" width="52"> <div> <div align="center"><span class="he">J1</span></div> </div> </td> <td valign="top" width="250" colspan="5"> <div> <div align="center"><span class="he">液体</span></div> </div> </td> </tr> <tr> <td valign="top" width="52"> <div> <div align="center"><span class="he">J2</span></div> </div> </td> <td valign="top" width="250" colspan="5"> <div> <div align="center"><span class="he">气体</span></div> </div> </td> </tr> <tr> <td valign="top" width="52"> <div> <div align="center"><span class="he">J3</span></div> </div> </td> <td valign="top" width="250" colspan="5"> <div> <div align="center"><span class="he">蒸汽</span></div> </div> </td> </tr> <tr> <td valign="top" rowspan="16" width="52"> <div> </div> </td> <td valign="top" width="84" colspan="2"> <div> <div align="center"><span class="he">代号</span></div> </div> </td> <td valign="top" width="166" colspan="3"> <div> <div align="center"><span class="he">连接方式</span></div> </div> </td> </tr> <tr> <td valign="top" width="84" colspan="2"> <div> <div align="center"><span class="he">L1</span></div> </div> </td> <td valign="top" width="166" colspan="3"> <div> <div align="center"><span class="he">法兰卡装?/span></div> </div> </td> </tr> <tr> <td valign="top" width="84" colspan="2"> <div> <div align="center"><span class="he">L2</span></div> </div> </td> <td valign="top" width="166" colspan="3"> <div> <div align="center"><span class="he">法兰连接?/span></div> </div> </td> </tr> <tr> <td valign="top" rowspan="13" width="84" colspan="2"> <div> </div> </td> <td valign="top" width="60"> <div> <div align="center"><span class="he">代号</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">功能2</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">E1</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">1.0?/span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">E2</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">1.5?/span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">T1</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">常温</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">T2</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">高温</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">T3</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">蒸汽</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">P1</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">1.6MPa</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">P2</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">2.5MPa</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">P3</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">4.0MPa</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">D1</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">内部3.6V供电</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">D2</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">DC24V供电</span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">B1</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">不锈?/span></div> </div> </td> </tr> <tr> <td valign="top" width="60"> <div> <div align="center"><span class="he">B2</span></div> </div> </td> <td valign="top" width="106" colspan="2"> <div> <div align="center"><span class="he">碳钢</span></div> </div> </td> </tr> </tbody> </table> </p> <p style="text-align: left"> 相关产品?b><a 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