孔板流量计算公式Word格式.docx

1、10203040506070809010071.291.301.311.321.331.34气压校正系数p值表三；压力（mmHg）p（mmHg）1500.442900.6174301552950.6234351600.453000.6294401653050.6334451703100.6394501753150.6434551800.463200.6494601853250.6544651900.473300.6594701953350.6634752000.483400.6694800.7525700.8667100.9670.7565750.8707150.9700.7615800.87

2、47200.9730.7655850.8787250.9770.7695900.8817300.9800.7745950.8867350.9840.7786000.8897400.9870.7826050.8927450.9900.7866100.8967500.9930.7916150.9007550.9970.7946200.9037601.0002053450.6744850.7996250.9077651.0032103500.6784900.8036300.9107701.0062153550.6834950.8076350.9147751.0092200.493600.689500

3、0.8116400.9187801.0132253650.6935050.8156450.9227851.0162300.503700.6985100.8196500.9257901.0192353750.7025150.8236550.9287951.0232403800.7075200.8276600.9328001.0262453850.7125250.8316650.9358051.0292500.513900.7165300.8356700.9398101.0312553950.7205350.8396750.9428151.0342604000.7255400.8436800.94

4、68201.0372654050.7295450.8476850.9498252700.524100.7345500.8506900.9538301.0432754150.7395550.8546950.9568351.0472800.534200.7435600,8587000.9608401.0502854250.7485650.8627050.9638451.0530.540.55温度校正系数T值表四；温度10 0 -0 -1 0 -2 0 -3 0 -4 009680983100010171035105610761098112209660982099810161034103710581

5、078109911230964098009971014103310391059108011031126096309790995101210321041106110831105112909610977099310101029104310631085110811310960097509921008102710451066108611091133095809740990100710251047106810891115113909570972098810051023104910701091095509710987100310211052107210941117114109540969098510011

6、01910541074109511191143i . DU254mm、llL 蒲mmdlnl27mm、m 料、 ls啡冲 30mmH2O、30% x-山Etl 1.01X105Pa 咂牙耳 ls007Mpa、团弩前岡冲 20oc、?耦-田AnQgDu*b*（Ah）98*136）607*10698*1362326mmHg- 6PU0.556 51 - 6TU0.983 淫 Q8ioHO019*lo74*30265566983UO06Irn3、minQ 游H Q8io*XHOo61*30%HO0183 r3n5举例）YD-2 型孔板流量计的应用与计算孔板流量计用以测定瓦斯管路中的瓦斯流量（如下图）

7、。一、 抽放瓦斯管路中孔板流量计的安装与使用：（1）、在抽放瓦斯管路中安装孔板时，孔板的孔口必须与管道同心，其端面与管路轴线垂直，偏心度1；（2）、安装孔板的管道内壁，在孔板前后距离 2D 的范围 内，不应有凸凹不平，焊缝和垫片等。（3）、孔板流量计的上游（前端），管道直线长度20D， 下游（后端）长度10D；（4）、要经常清理孔板前后的积水和污物，孔板锈蚀要更 换；（5）、抽放瓦斯量有较大变化时，应根据流量大小更换相 应的孔板。二、 应用孔板流量计与计算管道内的瓦斯流量时，必须同 时测量的参数：（1）、孔板前后端的压差值（h）；（2）、测量地点的大气压力（PD）；（3）、管道内的气体压力（P

8、G），D 正压或负压；（4）、管道内的气体温度（t）;（5）、管道内的瓦斯浓度（x）。三、 抽放的混合瓦斯量计算： QH=9.81-1/2Kb（h）1/2TP 式中：QH 抽放的混合瓦斯量，m3/min;KH 孔板系数，取实际校正值；0.3072b 瓦斯浓度校正常数；b=1/（1-0.00446x） 1/2x 混合瓦斯中的瓦斯浓度，%； h 孔板前后端压差；T 温度校正系数；T=293/（273+t） 1/2t 管道内的气体温度，；PD 测量地点的大气压力；PG 观测点管道内的压力，正压取（+）,负压取（-）,Kpa;101.325 标准大气压，Kpa。四、 抽放的纯瓦斯量计算 Qc=QHX/

9、100 式中 Qc 抽放的纯瓦斯量，m3/min; 采面 钻场孔板测定数据记录表年 月时间钻场（）孔板 前后 端的 压差 h（KPa）管道内的气体PG测量 地点 的大 气压 力 PD （Kpa）温度（t）x（%）备注日班测定QH=9.81-1/2Kb（h）1/2TP=9.81-1/2*0.3072*（1-0.00446）-1/2*（ h）1/2* 293/（273+t） 1/2* （PD PG）/101.3251/2管道内的气体压力 PG 负压取负值；表一）实际孔板流量特性系数K 值表管径D （ mm ）m a 0K0.050.10.150.20.250.30.350.40.50.60.650

10、.715a 00.61550.61920.62570.63350.64260.65320.66540.68150.69920.71920.74060.76730.79610.82230.00130.00260.00400.00540.00690.00700.00990.01180.01340.01540.01740.01970.02210.02460.61510.61880.62520.63300.64230.65280.66470.68080.69840.71840.73980.76640.79530.82180.00230.00470.00710.00960.01220.01250.017

11、70.02070.02390.02730.03090.03490.03930.0437250.61370.61840.62470.63250.64170.65240.66400.68010.69760.71760.73900.76550.79450.82150.00370.00730.01110.01500.01900.02320.02750.03220.03710.04250.04810.05440.06120.0681380.61730.62340.63130.64020.65120.66240.67830.69540.71540.73710.76330.79230.82080.00840

12、.01690.02560.02360.03290.05250.06340.07480.08700.10010.11450.13010.14640.61280.61620.62210.62930.63870.64920.66070.67640.69340.71340.73500.76100.79000.82000.01450.02920.03330.04870.06330.07990.09720.11590.13550.15670.17930.20410.23110.2598750.61090.61400.61960.62610.63570.64600.65740.67270.68920.709

13、20.73100.75650.78580.81850.03060.06550.09920.13370.16960.206220.24560.28720.33100.37850.42920.48450.54520.61160.60900.61170.61700.62380.63270.64280.65410.66900.68500.70500.72700.75200.78150.81700.05780.11610.17550.23660.30010.35470.42310.49650.57360.65760.74610.84360.95130.07261250.60780.61050.61600

14、.62230.63100.64110.66750.68350.70320.72520.75000.77940.81450.09010.18100.27400.36900.46770.57030.67700.79170.91201.02451.18261.33431.50211.69050.60670.60930.61500.62090.62940.63940.65060.66600.68200.70150.72350.74800.77730.81200.12930.26020.39390.53020.67180.81900.97221.13741.31031.49761.69901.91622

15、.15722.42680.60550.60810.61340.61950.62770.63770.64880.66450.68050.69980.72180.74600.77510.80950.17600.35340.53470.72001.11181.31971.54471.78002.03342.30712.60122.92793.27560.60430.60690.61190.61800.62600.63600.64700.66300.67900.69800.74400.77300.80700.22940.46070.69790.93821.18791.44831.71892.01302

16、.31932.64913.00583.38843.81384.26510.60350.60590.61720.62550.63550.64650.66220.67820.69720.71900.74300.77170.80570.28990.58120.88041.18581.50231.83152.17382.54462.93183.34893.79904.28264.81885.38920.60270.60500.61000.61650.62500.63500.66150.67750.69650.71800.74200.77050.80450.35750.71750.08521.46231

17、.85312.25932.68163.13823.61594.13034.68355.28015.93986.64340.60180.60400.61570.62450.63450.64550.66080.67680.69580.71700.74100.76930.80330.43180.86391.31091.77102.24062.73163.24223.79324.37064.99265.66636.38037.17608.02640.60100.60300.60800.62400.63400.64500.66000.67600.69500.71600.74000.76800.80200.51320.02981.55762.10062.66423.24833.85554.50875.19535.93476.72557.58288.52559.5366