江苏LZB-80 玻璃转子流量计 塑料转子流量计生产厂家

¥1800.00-¥2300.00

最小起订量:1 总供货量:1998

    一:简介:

    玻璃转子流量计的主要测量元件为一根垂直安装的下小上大锥形玻璃管和在内可上下移动的浮子。当流体自下而上经锥形玻璃管时,在浮子上下之间产生压差,浮子在此差压作用下上升。当此上升的力、浮子所受的浮力及粘性升力与浮子的重力相等时,浮子处于平衡位置。因此,流经玻璃转子流量计的流体流量与浮子上升高度,即与玻璃转子流量计的流通面积之间存在着一定的比例关系,浮子的位置高度可作为流量量度。

    二:安装使用

         

        如何正确选用玻璃转子流量计     
    
        玻璃转子流量计是一种使用简单、读数方便、用途十分广泛的瞬时流量测量仪表。在环境保护设备仪器这个范畴里用量多达三万余台/年。因此,选好、用好这种仪表,极为重要。     
    
            
  1.             
                    玻璃转子流量计的品种及选用             
            
  2.     
    
        玻璃转子流量计根据它的用途和适应范围可分为:普通型、带筋维管型,微小流量及小外形型、耐腐型、实验室型、保温型、报警型和耐高压型八个系列。按照国家制订的仪表系列型谱,不论哪个系列,最多包括从1毫米到100毫米共12个口径数,可测量的流量范围是:液体(水)0.1毫升/分~40立方米/时,气体(空气)1毫升/分~1000立方米/时。用于环保仪器配套的玻璃转子流量计一般口径不超过10毫米,测量的流量属小流量范围。     
    
            
  1.             
                    玻璃转子流量计的刻度修正             
            
  2.     
    
        玻璃转子流量计的刻度,是生产厂在本厂条件下用近于理想流体的水和干燥空气作介质标定得到的。但在流量计的使用现场,有两种情形不能直接使用它的刻度值:一是测量介质不是水和空气,二是测且介质虽为水和空气,但其状态(温度.压力)与刻度状态有别。这样,在使用流量计时,为获得正确测量结果,就出现了需要把刻度值进行修正的问题。因而,解决好玻璃转子流量计刻度修正,是用好这种仪表的关键。     
    
        考虑到环保仪器使用转子流量计大量的用采测气体介质流量,因此下文仅就气体介质测量时的密度修正进行讨论。由于气体介质的粘度很小,故而讨论时略去粘度影响。实践证明,这不影响修正后的精度。     
    
        下面是转子流量计流量一般表达式     
    
        式(1)是不考虑介质粘度影响的计算式。从(1)式可明显得出:当一台流量计浮子位置高度确定后,被测介质密度ρ是唯一的变数,如果被测介质密度不同,则介质通过流量计的流量也不同。因此,刻度修正实际上也就是流量修正。     
    
        如果两种不同密度ρ1、ρ2的介质分别通过同台转子流量计时,若浮子平衡在同一位固上,由(1)式得转子流量计密度换算的基本式:     
    
        式中,P1、Tl和P2、T2是同一介质的两种状态分别用压力和温度两个参数表示。可见,对同种气体介质而言,其密度换算完全可以转化为不同状态下的温度、压力换算。这样,对于测量同种气体介质流量的刻度修正,最终变成了温度、压力的状态修正(实质上是密度修正),显而易见,这是一般使用单位极易实现的修正方法。     
    
        (一)在使用现场从流量计刻度读数如何求取实际流量值?     
    
        在使用现成应用转于流量计的目的只有一个:即检测被测介质的实际流量。但是,不少使用单位忽略了现场状态与流量计刻度状态(即标准状态)的不同,直接以流量计刻度读数作为被测介质的实际流量值,十分明显,这个实际流量是不真实的,它会给流量计的测量带来误差,从而给配套仪器最后的检测结果造成谬误。     
    
        在现场,从流量计刻度读数求取实际流量值,实质上是将流量计标准状态下的流量值换算成现场工况下的流量值。我们设现场工况有关参数代号分别为实际流量Q,介质压力P和温度T;转子流量计刻度的有关参数代号分别为流量Q比标准状态的压力Po和温度To,根据(4)式有:     
    
        利用(5)式,可见很方便地在现场从流量计读数求得被测介质实际流量值。需要特别指出,用(5)式计算时,P、P。、T、T。都应代入绝对值,而P是表前压,应在流量计上游侧、并紧靠流量计的管路部位测取。     
    
        例:使用某空气采样仪,运行时,采样仪上转子流量计读数为500毫升/分,测表前压为—100mmH 20(因使用抽气泵,所以是负压),现场温度为30℃,求此时空气的实际流量值。     
    
        解,根据测定的数据,有     
    
        这里,因为P。用毫米汞柱作单位,所以毫米水柱必须化成毫米汞柱,计算时,只须将毫米水柱除以13.6即可。     
    
        从上例结果看出,尽管现场状态与标准状态相差不大,但对测量结果却产生了22毫升/分(为标准值的4.4%)的差值。换句话路如果不修正,则流量值会产生4.4%的误差!     
    
        (二)用户根据实际使用流量,如何选购合适的转子流量计?     
    
        这个问题恰是上述(一)的逆过程,只需把(5)式反过来即成:     
    
        这里,Q是实际使用流量;P、T、Po、To都为已知,用〔6〕式d算出的Qn即为将要选购的转子流量计的刻度流量值。注意,Q应是常用流量。为保证流量计使用时有足够精度和余量,选购玻璃转子流量计的上限应为Qn的1.5倍。     
    
        我们想强调此条的重要性,因为,如果当被测介质压力较大时,它是绝对不可忽略的。例如,若被测介质压力为3kg/cm2,并假定温度与标准温度相差无几,则P=3+1kg/cm2 (绝对单位,P。=1),代入(6)式后将得到Qn÷2Q。就是说,若常用流量为Q,则合宜的流量计上限应为1.5×2 Q=3Q,如此时仍按Q选购流量计,势将满足不了使用要求而贻误生产。     
    
        转子流量计的密度换算还可以速过图解法来进行。     
    
        测量液体介质时的刻度修正往往涉及粘度修正,而粘度修正是十分繁杂,计算较为困难。尽管如此,还有别的方法可弥补,限于篇幅,这里再不累述。     
三:技术指标与参数选型

         

        玻璃转子流量计普通型     
         
                    
                        型号                     
                
                    
                        公称通径mm                     
                
                    
                        工作压力MPa                     
                
                    
                        基本误差限%                     
                
                    
                        范围度                     
                
                    
                        测量范围                     
                
                    
                     
                    
                     
                    
                     
                    
                        液体                     
                
                    
                        气体                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-2                     
                
                    
                        φ2                     
                
                    
                        ≤1                     
                
                    
                        ±4                     
                
                    
                        1∶10                     
                
                    
                        0.4~4                     
                
                    
                        mL/min                     
                
                    
                        6~60                     
                
                    
                        mL/min                     
                
                    
                        0.6~6                     
                
                    
                        10~100                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        1~10                     
                
                    
                        16~160                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        1.6~16                     
                
                    
                        25~250                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-3                     
                
                    
                        φ3                     
                
                    
                        ≤1                     
                
                    
                        ±4                     
                
                    
                        1∶10                     
                
                    
                        2.5~25                     
                
                    
                        40~400                     
                
                    
                     
                    
                     
                    
                        4~40                     
                
                    
                        60~600                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        6~60                     
                
                    
                        100~1000                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        10~100                     
                
                    
                        160~1600                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-4                     
                
                    
                        φ4                     
                
                    
                        ≤1                     
                
                    
                        ±4                     
                
                    
                        1∶10                     
                
                    
                        1~10                     
                
                    
                        L/h                     
                
                    
                        16~160                     
                
                    
                        L/h                     
                
                    
                        1.6~16                     
                
                    
                        25~250                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        2.5~25                     
                
                    
                        40~400                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-6                     
                
                    
                        φ6                     
                
                    
                        ≤1                     
                
                    
                        ±2.5                     
                
                    
                        1∶10                     
                
                    
                        2.5~25                     
                
                    
                        40~400                     
                
                    
                     
                    
                     
                    
                        4~40                     
                
                    
                        60~600                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        6~60                     
                
                    
                        100~1000                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-10                     
                
                    
                        φ10                     
                
                    
                        ≤1                     
                
                    
                        ±2.5                     
                
                    
                        1∶10                     
                
                    
                        6~60                     
                
                    
                        100~1000                     
                
                    
                     
                    
                     
                    
                        10~100                     
                
                    
                        160~1600                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        16~160                     
                
                    
                        250~2500                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-15                     
                
                    
                        φ15                     
                
                    
                        ≤0.6                     
                
                    
                        ±1.5                     
                
                    
                        1∶10                     
                
                    
                        16~160                     
                
                    
                        250~2500                     
                
                    
                     
                    
                     
                    
                        25~250                     
                
                    
                        400~4000                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        40~400                     
                
                    
                        600~6000                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-25                     
                
                    
                        φ25                     
                
                    
                        ≤0.6                     
                
                    
                        ±1.5                     
                
                    
                        1∶10                     
                
                    
                        0.04~0.4                     
                
                    
                        m3/h                     
                
                    
                        1~10                     
                
                    
                        m3/h                     
                
                    
                        0.06~0.6                     
                
                    
                        1.6~16                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        0.1~1                     
                
                    
                        2.5~25                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-40                     
                
                    
                        φ40                     
                
                    
                        ≤0.6                     
                
                    
                        ±1.5                     
                
                    
                        1∶10                     
                
                    
                        ----                     
                
                    
                        4~40                     
                
                    
                     
                    
                     
                    
                        0.16~1.6                     
                
                    
                        6~60                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        0.25~2.5                     
                
                    
                        ----                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-50                     
                
                    
                        φ50                     
                
                    
                        ≤0.6                     
                
                    
                        ±1.5                     
                
                    
                        1∶10                     
                
                    
                        0.4~4                     
                
                    
                        10~100                     
                
                    
                     
                    
                     
                    
                        0.6~6                     
                
                    
                        16~160                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        1~10                     
                
                    
                        ----                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-80                     
                
                    
                        φ80                     
                
                    
                        ≤0.4                     
                
                    
                        ±1.5                     
                
                    
                        1∶10                     
                    
                        1∶5                     
                
                    
                        1~10                     
                
                    
                        50~500                     
                
                    
                     
                    
                     
                    
                        1.6~16                     
                
                    
                        80~400                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        7~30                     
                
                    
                        ----                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-100                     
                
                    
                        φ100                     
                
                    
                        ≤0.4                     
                
                    
                        ±1.5                     
                
                    
                        1∶10                     
                
                    
                        5~25                     
                
                    
                        120~600                     
                
                    
                     
                    
                     
                    
                        8~40                     
                
                    
                        200~1000                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        12~60                     
                
                    
                        ----                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
    
        注:以上规格(DN2~10)流量计均为侧进侧出,软管或螺纹连接,下基座上带针型流量调节阀。     
    
        玻璃转子流量计液体流量均为以20℃清水标定刻度,气体流量均以20℃、101325Pa空气标定刻度。     
    
        根据用户要求,可以做特殊流量的流量计,DN100通径最大流量可达120m3/h,最大气流量可达3500m3/h,也可进行特殊修正标定。     
    
        

            防腐型         

    
         
                    
                        型号                     
                
                    
                        公称通径mm                     
                
                    
                        工作压力MPa                     
                
                    
                        基本误差限%                     
                
                    
                        范围度                     
                
                    
                        测量范围                     
                
                    
                     
                    
                     
                    
                     
                    
                        液体                     
                
                    
                        气体                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-15F                     
                
                    
                        φ15                     
                
                    
                        ≤0.6                     
                
                    
                        ±4                     
                
                    
                        1∶10                     
                
                    
                        0.016~0.16                     
                
                    
                        m3/h                     
                
                    
                        0.25~2.5                     
                
                    
                        m3/h                     
                
                    
                        0.025~0.25                     
                
                    
                        0.4~4                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        0.04~0.4                     
                
                    
                        0.6~6                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-25F                     
                
                    
                        φ25                     
                
                    
                        ≤0.6                     
                
                    
                        ±2.5                     
                
                    
                        1∶10                     
                
                    
                        0.04~0.4                     
                
                    
                        1~10                     
                
                    
                     
                    
                     
                    
                        0.06~0.6                     
                
                    
                        1.6~16                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        0.1~1                     
                
                    
                        2.5~25                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-40F                     
                
                    
                        φ40                     
                
                    
                        ≤0.6                     
                
                    
                        ±2.5                     
                
                    
                        1∶10                     
                
                    
                        ----                     
                
                    
                        ----                     
                
                    
                     
                    
                     
                    
                        0.16~1.6                     
                
                    
                        4~40                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        0.25~2.5                     
                
                    
                        6~60                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-50F                     
                
                    
                        φ50                     
                
                    
                        ≤0.6                     
                
                    
                        ±2.5                     
                
                    
                        1∶10                     
                
                    
                        ----                     
                
                    
                        ----                     
                
                    
                     
                    
                     
                    
                        0.4~4                     
                
                    
                        1~10                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        0.6~6                     
                
                    
                        1.6~16                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-80F                     
                
                    
                        φ80                     
                
                    
                        ≤0.4                     
                
                    
                        ±2.5                     
                
                    
                        1∶10                     
                    
                        1∶5                     
                
                    
                        ----                     
                
                    
                        ----                     
                
                    
                     
                    
                     
                    
                        1~10                     
                
                    
                        50~250                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        1.6~16                     
                
                    
                        80~400                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        LZB-100F                     
                
                    
                        φ100                     
                
                    
                        ≤0.4                     
                
                    
                        ±2.5                     
                
                    
                        1∶10                     
                
                    
                        ----                     
                
                    
                        ----                     
                
                    
                     
                    
                     
                    
                        5~25                     
                
                    
                        120~1600                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                        8~40                     
                
                    
                        200~1000                     
                
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
                    
                     
    
        注:公称通径≤10mm以下耐腐型需订做一般不带针型调节阀。     
    
        根据客户要求,可以生产高一级精度的耐腐型流量计。     
    
        流量计与被测介质接触部分材料     
    
        

            普通型         

    
         
                    
                        型号                     
                
                    
                        基座及阀针                     
                
                    
                        法兰                     
                
                    
                        止档                     
                
                    
                        浮子                     
                
                    
                        导杆                     
                
                    
                        密封填料                     
                
                    
                        LZB-2                     
                    
                        LZB-3                     
                    
                        LZB-4                     
                    
                        LZB-6                     
                    
                        LZB-10                     
                
                    
                        黄铜镀铬                     
                
                    
                        -----                     
                
                    
                        聚四氟乙烯                     
                    
                        (PTFE)                     
                
                    
                        玛瑙或不锈钢                     
                    
                        (1Cr18Ni9Ti)                     
                
                    
                        -----                     
                
                    
                        耐酸碱橡胶(IV-1)                     
                
                    
                        LZB-15                     
                    
                        LZB-25                     
                    
                        LZB-40                     
                
                    
                        -----                     
                
                    
                        铸铁内衬                     
                    
                        耐酸碱橡胶                     
                    
                        (IV-1)                     
                
                    
                        聚四氟乙烯                     
                    
                        (PTFE)                     
                
                    
                        不锈钢                     
                    
                        (1Cr18Ni9Ti)                     
                
                    
                        不锈钢                     
                    
                        (1Cr18Ni9Ti)                     
                
                    
                        耐酸碱橡胶(IV-1)                     
                
                    
                        LZB-50                     
                    
                        LZB-80                     
                    
                        LZB-100                     
                
                    
                        -----                     
                
                    
                        铸铁内涂                     
                    
                        氨基烘漆                     
                
                    
                        铸铁内涂                     
                    
                        氨基烘漆                     
                
                    
                        不锈钢                     
                    
                        (1Cr18Ni9Ti)                     
                
                    
                        不锈钢                     
                    
                        (1Cr18Ni9Ti)                     
                
                    
                        耐酸碱橡胶(IV-1)                     
                
    
        

            GA24系列         

    
    
        主要技术参数     
         
                    
                        型号                     
                
                    
                        公称通径(mm)                     
                
                    
                        测量 范围(L/h)                     
                
                    
                        精度(+%)                     
                
                    
                        工作温度                     
                
                    
                        工作压力                     
                
                    
                        水20℃Water(L/h)                     
                
                    
                        空气(101325pa 20℃)Air(m/h)                     
                
                    
                        GA24-15GA24-15F                     
                
                    
                        15                     
                
                    
                        4~40 6.3~6310~100 12~12016~160 20~20025~250 30~30036~360 40~40046~460 63~63065~650 75~750                     
                
                    
                        0.12~1.2 0.2~20.3~3 0.4~40.5~5 0.6~60.8~8 0.9~91.2~12 2~20                     
                
                    
                        1.5                     
                
                    
                        -20℃~+60℃或0℃~+120℃                     
                
                    
                        ≤1.0Mpa                     
                
                    
                        GA24-25GA24-25F                     
                
                    
                        25                     
                
                    
                        40~400 50~50063~630 80~800100~1000 120~1200160~1600 200~2000250~2500 300~3000                     
                
                    
                        1.6~162~202.5~253~304~405~506~60                     
                
                    
                        GA24-40GA24-40F                     
                
                    
                        40                     
                
                    
                        160~1600 200~2000250~2500 300~3000400~4000 500~5000                     
                
                    
                        5~506~608~809~9012~120                     
                
                    
                        ≤0.9Mpa                     
                
                    
                        GA24-50GA24-50F                     
                
                    
                        50                     
                
                    
                        250~2500 300~3000400~4000 500~5000630~6300 800~80001000~10001500~15000                     
                
                    
                        10~10012~12016~16020~20030~300                     
                
                    
                        ≤0.7Mpa                     
                
    
        安装尺寸     
         
                    
                        公称通径(mm)                     
                
                    
                        窗口尺寸AxB                     
                
                    
                        L                     
                
                    
                        C                     
                
                    
                        D                     
                
                    
                        E                     
                
                    
                        15                     
                
                    
                        37x302                     
                
                    
                        500                     
                
                    
                        Φ65                     
                
                    
                        Φ95                     
                
                    
                        4-Φ14                     
                
                    
                        25                     
                
                    
                        52x294                     
                
                    
                        Φ85                     
                
                    
                        Φ115                     
                
                    
                        40                     
                
                    
                        64x278                     
                
                    
                        Φ110                     
                
                    
                        Φ145                     
                
                    
                        4-Φ18                     
                
                    
                        50                     
                
                    
                        94x266                     
                
                    
                        Φ125                     
                
                    
                        Φ160                     
                
    
        

            不锈钢型         

    
    
        LZB-□□B或LZB-□□B0     
    
        法兰或基座及阀针、浮子及导杆、支承板、罩壳及螺栓等均为不锈钢1Cr18Ni9Ti,型号为LZB-□□B,如过流材质选用不锈钢0Cr18Ni12Mo2Ti(316),则需选LZB□□B0,需定做。     
    
        

            耐腐型         

    
    
        LZB-□□F或LZB-□□F/B     
    
        DN2~10采用PTFE基座,DN15~100采用铸铁法兰内衬PTFE,型号为LZB-□□F。     
    
        DN15~100如要采用不锈钢(304或316)法兰内衬PTFE,则为全不锈钢耐腐型。型号为LZB-□□F/B(或B0)需定做。     
    
        注:所有通径流量计锥形玻管材料为高硼硅质玻璃.     
    
        公称通径≤10mm以下,普通耐腐型可采用全不锈钢材质,如果测量强腐蚀性介质,则基座和密封材料采用聚四氟乙烯,支承板采用不锈钢,一般不能带针阀,并需定做。     

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