■ 1 概述
腰轮流量计是用于对管道中流量进行连续或间歇测量的高精度计量仪表。它具有精度高、可靠性好、重量轻、寿命长、安装使用方便等特点，是容积式流量计的典型特点。 腰轮流量计主要由计量腔、密封联轴器和计数器三部分组成。可现场指示累积流量和瞬时流量，配以发信器及流量智能控制仪，可实现远距离测量和控制。广泛用于石油、化工、电力、冶金、交通、食品加工、医药、国防、商业贸易等部门对石油及石油制品、化学溶液等流体的精确测量。
■ 1.summarize
Lumbar wheel flow meter is used for pipeline liquid flow measurement of continuous or intermittent high-precision measurement instrumentation. It has high accuracy, good reliability, light weight, long life, easy installation etc. It is a typical positive displacement flow meter products. Roots Flow meter mainly by the measurement cavity, sealing the composition of the coupling and counters. The instructions can be cumulative and instantaneous flow of traffic, coupled with letters intelligent control device and flow meter, can realize remote measurement and control. It widely used in petroleum, chemical, electric power, metallurgy, transportation, food processing, medicine, defense, commerce and trade sectors such as oil and petroleum products, chemical solutions and other fluids accurate measurement.
■ 2.工作原理
当被测液体流经计量室时，在流量计的进出口形成 压差，腰轮在此压差的推动下旋转。同时通过固定在腰轮轴上的一对驱动齿轮，使两个腰轮保持连续旋转。随着腰轮的转动，液体经由计量室被不断排出流量计。每对流过的液体量是计量室容积的四倍，通过密封联轴器、减速机构，将旋转次数减速后传递到计数器，计数器即指示液体瞬时流量和累积流量。
在计数器机构中安装发信器即成了带发信器的腰轮流量计。与显示仪表或微机系统配套，可实现远传（定量、累积、瞬时等功能）自动化测量和控制。使用说明另见显示仪表分类说明书。 ■ 2. works
When the measured liquid flowing through the measuring chamber when the pressure in the formation of the import and export meter, waist-round under the impetus of pressure in the second rotation. At the same time fixed on the waist by a pair of drive axle on the gear, there are two waist-round to maintain a continuous rotation. With the waist wheel rotation, the liquid is continuously discharged through the metering chamber flow meter. Convection over the liquid for each volume is four times the volume of metering chamber. Through the sealing coupling, deceleration institutions, after slowing down the rotation number passed to the counter,
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counters that the instantaneous direction of liquid flow and cumulative flow.
Counting bodies in the installation of devices that have become with a letter writing device Roots Flow meter. And display instruments or computer systems accessories, and can be realized Remote (quantitative, cumulative, instantaneous and other functions) automatic measurement and control. See instructions display instrument classification manual.
■ 3.主要零件材料组合
材料 零件 壳体 转子 盖板 转子轴 轴承 铸铁 ☆ ☆ ☆ AL 铸铝 ☆ ☆ 不锈钢 铸钢 ☆ ☆ 铸铝 EL 不锈钢 ☆ ☆ 铸铁 ☆ 铸铁 ☆ ☆ ☆ LL 铸铝 ☆ ☆ 不锈钢 ■ 3. Main parts and materials combinations
Materials Parts shell rotor cover Rotor shaft Bearing AL Iron ☆ ☆ Aluminum ☆ Stainless ☆ ☆ Cast ☆ EL Aluminum LL Stainless ☆ ☆ Iron Iron ☆ ☆ ☆ Aluminum ☆ Stainless ☆ ☆ ☆ ■ 4.性能和压力损失曲线
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■ 4. Performance and pressure drop curves
■ 5.技术参数
① 公称压力（MPa）:0.6、1.0、1.6、2.5、4.0 ② 工作温度：（℃）：-10~60 ③ 精度等级：0.5、0.2 ④ 流量范围：（m3/h） 公称通径 液体粘度 3.0~150mpa.s 0.25~2.5 0.25~2.5 0.6~6 1.6~16 2.5~25 6~60 12~100 10~100 40~200 0.5 液体粘度 3.0~150mpa.s 0.5~2.5 ~2.5 1.2~6 3.2~16 5~25 12~60 22~100 20~100 40~200 液体粘度 3.0~150mpa.s 0.5~2.5 0.5~2.5 1.2~6 3.2~16 5~25 12~60 20~100 20~100 100~200 0.2 液体粘度 3.0~150mpa.s 0.83~2.5 0.83~2.5 2~6 5.3~16 8.3~25 20~60 33.3~100 33.3~100 66.7~200 15 20 25 40 50 80 80Ⅱ 100 150 精度等级
■ 5. Specifications
①Working pressure（MPa）：0.6，1.0，1.6，2.5，4.0 ②Temperature（℃）：-10~60 ③Accuracy grade：0.5，0.2 ④Flow Range（m3/h）
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Diameter(mm) Liquid viscosity Liquid viscosity Liquid viscosity Liquid viscosity 3.0~150mpa.s 3.0~150mpa.s 3.0~150mpa.s 3.0~150mpa.s 15 20 25 40 50 80 80Ⅱ 100 150 0.25~2.5 0.25~2.5 0.6~6 1.6~16 2.5~25 6~60 12~100 10~100 40~200 0.5 0.5~2.5 ~2.5 1.2~6 3.2~16 5~25 12~60 22~100 20~100 40~200 0.5~2.5 0.5~2.5 1.2~6 3.2~16 5~25 12~60 20~100 20~100 100~200 0.2 0.83~2.5 0.83~2.5 2~6 5.3~16 8.3~25 20~60 33.3~100 33.3~100 66.7~200 Accuracy grade ■ 6. 外形及安装尺寸 ■ 6. Overall and installation dimensions （1）铸铁型腰轮流量计外形尺寸
(1) Iron-based Roots Flow meter Dimensions L H I B D D1 Model 型号 LL-AL15.06 160 238 52 100*100 G11/4 LL-AL20.06 LL-AL25.06 LL-AL40.1 LL-AL50.1 LL-AL80.1 LL-AL80Ⅱ.1 LL-AL100.1 LL-AL150.1 160 180 240 265 265 265 515 560 238 260 290 305 340 470 425 550 52 68 88 97 122 164 164 225 100*100 120*120 170 190 246 246 305 455 90 G1/ 150 165 200 200 220 285 65 110 125 160 160 180 240 n-d 4-17.5 4-C17.5 8-17.5 8-18 8-18 8-22 （2）铸钢型腰轮流量计外形尺寸
(2) Cast steel wheel flow meter lumbar Dimension
Model 型号 LL-EL25.3 LL-AL40.4 LL-AL50.4 LL-AL80.4 LL-AL100.3 LL-AL150.3 L 180 300 360 360 540 560 H 260 290 315 348 435 552 I 68 88 103 128 174 227 B 120*120 170 276 254 330 455 D G11/4 150 165 200 235 300 D1 110 125 160 190 250 n-d 4-18 4-18 4-18 4-22 4-26 （3）铸铝型腰轮流量计外形尺寸与铸铁型腰轮流量计外形尺寸相同
(3) Cast aluminum wheel flow meter lumbar dimension just as (1)
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■ 7.腰轮流量计的安装使用
■ 7. Lumbar wheel flow meter installation
（1）流量计前应安装过滤器，两者表体上箭头指向与流动方向一致
(1).Flow meter should be installed before the filter, the
two arrows pointing in the body on the line with the flow direction
（2）当被测液体含有气体时，流量计前应安装气体分离器 (2) Recently tested liquid containing gas, flow meter should
be installed before the gas separator
（3）不论管路是垂直还是水平安装，但流量计的腰轮轴安装成水平位置（即表度盘应与地面垂直）。
(3)Regardless of pipe is installed vertically or horizontally,
but the flow meter installed in the waist into a horizontal position axle ( dial the table should be perpendicular to the ground)
（4）流量计在正确安装情况下，如果不易看清读数，可把计数器旋转180度或90度均可。 (4) Flow meter installed in the right circumstances, if
difficult to see clearly, can be rotated 180 degrees to the counter, or 90 degrees
（5）节流阀应安装在流量计进口处，开闭阀装在出口处，使用开闭阀时要缓慢启动，不要突然开阀。 (5) Throttle valve should be installed in the meter entrance,
opening and closing valve installed in the exit of the use of open-close valve slowly to start, do not suddenly open valve
(6) 严禁使用扫线蒸汽通过流量计
Prohibited the use of scan-line steam through the flowmeter （7）在连续使用部门，流量计需加旁通管道
In the continuous use sector, need to add bypass pipe flow meter （8）流量计安装前，管道需冲洗，冲洗时采用直管段（替代流量计位置）防止焊渣、杂物等进入流量计
Pre-installation flow meter, piping required to wash, rinse used straight pipe section (alternative flow meter position) to prevent the welding slag and debris from entering flow meter
（9）严禁用水校验铸铁、铸钢材质组成的流量计
Check water is strictly prohibited cast iron, cast steel material composition of flow meter
（10）流量计在使用时流量大小不得超过技术要求。流量计正常工作在最大流量70~80%为优。
When using the flow meter size should not exceed the technical requirements. Flow meter to work at maximum flow rate 70 ~ 80% is good 。 （11）被测液体如果具有化学腐蚀性，需选用不锈钢材质的流量计，如果腐蚀性强，需选用0Crl8Ni12MO2Ti材质的流量计。 （12）流量计的安装方法如右图所示。
Flow meter installation method as shown on the right.
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