英文版气体涡轮流量计说明书.doc

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）1The generalizability LWGQ 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 BT6 (flameproof), Exia CT6 (Ann). Applicable to contain A and B , C T1 T4 explosive gas mixture temperature classes 0 (only this type) 1, 2, area for the dangerous sites.2Product featuresn High quality alloy turbine, have higher steady flow and corrosion effectn Imported high quality bearing, long service lifen Measuring room from ventilation chamber, guarantee the safety of the instrumentn Can be detected by measuring the temperature, pressure, and flow of the gas, can flow automatic tracking compensation, 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 valuesn Wide range of flow rate （Qmax/Qmin20:1), good repeatability, high precision (up to 1.0), small pressure loss, initiating flow rate is low, can reach 0.6m3/hn Intelligent instrument coefficient more nonlinear correctionn Built-in pressure, temperature sensors, high safety performance, compact structure, beautiful shapen Instruments with explosion protection and protective functions, marks for Exd BT6, Exia CT6, protection grade reaches IP65n System low power consumption, section 3.2 V10AH lithium batteries can be use more than 3 years in a rown 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.4Technical parameters：41 The basic parameters：411 Table 1specificationsNominal diameter（mm）Flow range （m3/h）Pick up traffic（m3/h）Pressure of work（MPa）Type of installationLWGQ-2525 （1）2.5-250.64.0Flange (thread)LWGQ-4040 （1.5）5-500.84.0Flange (thread)LWGQ-5050 （2）10-10014.0FlangeLWGQ-8080 （3）20-4002.51.6FlangeLWGQ-100100（4） 32-6502.51.6FlangeLWGQ-150150（6）50-100041.6FlangeLWGQ-200200（8）130-250081.6FlangeLWGQ-250250（10）200-4000121.6FlangeLWGQ-300300（12） 320-6500161.6Flange412 Level of accuracy: 1.0, 1.5413 Conditions of use： The environment temperature：-30+60； The atmospheric pressure：86KPa106KPa； Medium temperature：-30+80； Relative humidity：5%95%42 Electrical performance indicators：Table 2specificationsDisplay and outputPower supplyLWGQ- NLow voltage pulse level 1 v or less, high level 5 v, or three wire systemExternal power DC12V-24VLWGQA(4 20 mA) standard linear analog signal corresponds to (0 Qmax) m3 / h standard volume flow, two wire systemExternal powerDC24VLWGQBWith multipoint correction precision, at the same time show the instantaneous flow and cumulative 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, instrument coefficient, the cumulative flow value power lost decade is not lost.3.2 V10AH lithium batteriesLWGQCIn LWGQ - B (the scene display type) on the basis of adding 4-20 madc current outputExternal power DC24VLWGQDIn LWGQ - B (the scene display type) with temperature and pressure sensors, flow for automatic compensation correction arithmetic for different condition. Can query, such as temperature, pressure, battery at the same time. Can output high frequency, low frequency voltage pulse signal, and 4-20 madc two wire current signal.3.2 V10AH lithium battery or DC24V power supply43 Model system：Table 3ModelExplainLWGQMeterTypeNBasic, pulse outputACurrent output typeBThe display typeCDisplay output type (scene shows + current output)DTemperature, pressure compensation typeMeter diameter2525mm4040mm5050mm6565mm8080mm100100mm150150mm200200mm250250mm300300mmSensor materialNBasic material, high quality aluminum alloy. (the highest pressure: 1.0 MPa)SStainless 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.5Overall dimensionsFlow meter appearance is shown in figure 1, the specific sizes are shown in table 4Figure 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 4ModelNominal diametermmLDHKndBolt specificationConventional pressureMPaLWGQ-252515011523685414M12504.0LWGQ-4040150150266110418M1655LWGQ-5050150165285125418M1660LWGQ-6565240185300145418M16651.6LWGQ-8080240200319160818M1670LWGQ-100100300220337180818M1680LWGQ-150150450285395240822M2080LWGQ-2002005003404482951222M2090LWGQ-2502505004034953551226M2490LWGQ-3003005004605484101226M241006Selection of flowmeter 6.1 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 instance Known to the actual working pressure of a gas pipeline pressure) (table 0.8 MPa to 1.2 MPa, medium temperature 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 the flow 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： Type in the：Qb Standard of flow，m3/h； Q Working condition of traffic，m3/h； C* Scaling factor. (look-up table, a table is only for type selection reference when conversion) 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:： 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 m3/hEstimation of or use the following formula (type, C * as the conversion factor, check appendix table a)： m3/h Medium pressure was highest (1.2 MPa), the lowest temperature (5 ) (in gas trough), should have a minimum standard of volume flow：Namely m3/h Estimation of or use the following formula： m3/hSelection：learn from the above estimates that want to choose the flowmeter its working flow range is (213.5 965.472 m3 / h), by table 1 check, choose the meter models for LWGQ - 150. According to the gas equation of scaling factor C * valuesTable a C* PTMPa0.010.050.100.150.200.250.300.350.400.450.500.550.600.65()-201.271.702.302.873.344.024.595.165.736.306.877.448.028.59-151.251.702.262.823.383.944.505.065.626.186.747.307.868.42-101.221.662.212.763.313.864.414.965.516.606.617.167.718.26-51.201.632.172.713.253.794.334.875.415.956.497.037.57831101.181.602.132.663.193.724.254.785.315.846.376.907.437.9651.161.572.092.613.133.654.174.695.215.736.256.777.297.81101.141.552.062.573.083.594.104.615.125.636.146.667.177.68151.121.522.022.523.033.534.034.535.035.546.046.547.047.54201.101.491.992.482.973.473.964.454.955.445.936.436.927.42251.081.471.952.442.923.413.894.384.865.355.846.326.817.29301.061.441.922.402.883.353.834.314.785.265.746.226.697.17351.051.421.892.362.833.303.774.244.715.185.656.126.587.05401.031.401.862.322.783.253.714.174.635.095.566.026.486.94451.011.381.832.292.743.193.654.104.565.015.475.926.386.83501.001.351.802.252.703.153.594.044.494.945.385.836.286.73C*TPMPa0.700.750.800.850.900.951.001.201.401.602.002.503.004.00()-209.169.7310.310.911.412.012.614.917.219.424.029.735.446.9-158.989.5410.110.711.211.812.314.616.819.123.629.134.846.0-108.819.369.9110.511.011.612.114.316.518.723.128.634.145.1-58.659.199.7210.310.811.311.914.016.218.422.728.134.544.308.499.209.5510.110.611.111.713.815.918.022.327.632.943.458.338.869.389.9010.410.911.513.515.617.721.927.132.342.1108.198.709.219.7210.210.711.313.315.317.421.526.631.741.9158.058.559.059.5510.110.611.113.115.117.121.126.131.141.2207.918.408.909.399.8810.410.912.814.816.820.725.730.640.5257.788.268.759.239.7210.210.712.614.616.520.425.230.639.8307.658.128.609.089.5610.010.512.414.316.220.124.830.139.1357.527.998.468.939.409.8710.312.214.116.019.724.429.638.5407.407.878.338.799.259.7110.312.013.915.719.424.029.137.9457.297.478.208.659.119.5610.311.813.715.519.123.728.637.3507.177.628.078.528.969.119.8611.713.415.218.823.327.836.7Note:：1The value in the table to the local atmospheric pressure of 101.325 KPa to calculate； 2Pressure for the tableFz values of gas compressibility factorTable a tFz ）P（MPa）-20-15-10-505101520250.501.00881.00831.00781.00731.00691.00651.00611.00581.00541.00511.001.01801.01691.01591.01491.01401.01321.01241.01171.01101.01031.501.02761.02581.02421.02271.02131.02001.01881.01761.01661.01562.001.03751.03511.03281.03071.02871.02691.02521.02371.02221.02092.501.04791.04461.04161.03891.03631.03401.03181.02981.02801.02633.001.05871.05461.05081.04731.04411.04121.03851.03601.03371.03163.501.07001.06491.06021.05601.05211.04851.04531.04231.03961.03704.001.08181.07561.06991.06481.06021.05061.05211.04861.04541.04254.501.09411.08661.07991.07391.06851.06351.05911.05501.05131.04795.001.10691.09801.09021.08311.07681.07121.06601.06141.05711.05335.501.12011.10891.10061.09261.08531.07891.07301.06781.06301.05876.001.03391.12181.11131.10211.09391.08661.08001.07411.06881.06406.501.04801.13421.12221.11171.10251.09431.08701.08051.07461.06937.001.16241.14671.13321.12141.11111.10201.09431.08671.08031.07457.501.17701.15931.14421.13111.11971.10971.10081.09291.08591.07968.001.19171.17191.15511.14071.12821.11721.10751.09901.09131.0845tFz ）P（MPa）303540455055606570750.501.00481.00461.00431.00411.00391.00361.00341.00321.00311.00291.001.00971.00921.00871.00821.00771.00731.00691.00651.00611.00581.501.01471.01381.01301.01231.01161.01091.01031.00971.00911.00862.001.01971.01851.01741.01641.01541.01451.01371.01291.01211.01142.501.02471.02311.02171.02041.01921.01811.01701.01601.01511.01423.001.02971.02781.02611.02451.02301.02161.02031.01911.01801.01693.501.03471.03251.03051.02861.02681.02521.02361.02221.02081.01964.001.03971.03721.03481.03261.03051.02861.02691.02521.02361.02224.501.04471.04181.03911.03661.03431.03211.03011.02821.02641.02475.001.04971.04641.04341.04051.03791.03551.03321.03111.02911.02725.501.05471.05101.04761.04441.04151.03881.03631.03391.03171.02976.001.05961.05551.05171.04831.04501.04201.03931.03671.03431.03206.501.06441.05991.05581.05201.04851.04521.04221.03941.03681.03437.001.06921.06431.05981.05571.05191.04831.04511.04201.03921.03657.501.07381.06861.06371.05931.05521.05141.04781.04461.04151.03878.001.07481.07271.06751.06271.05831.05431.05051.04701.04381.04077Install and use71 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. I