1、水力計(jì)算
鋼管水力計(jì)算表400—900(鋼管水壓值計(jì)算公式)
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本文目錄:
一、水力計(jì)算
計(jì)算
管網(wǎng)水力平差計(jì)算
在特定供水條件下根據(jù)連續(xù)性方程和能量方程,求解管網(wǎng)中管段流量、節(jié)點(diǎn)壓力、泵站流量和揚(yáng)程,使管理及決策人員了解管網(wǎng)對(duì)供水需求的符合程度,檢驗(yàn)管網(wǎng)設(shè)計(jì)和運(yùn)行質(zhì)量,為泵站設(shè)計(jì)和運(yùn)行、管網(wǎng)運(yùn)行與擴(kuò)建提供依據(jù)。
管網(wǎng)水力狀態(tài)實(shí)時(shí)模擬計(jì)算
由于用戶用水量的變化,管網(wǎng)供水量和供水壓力是隨時(shí)間變化的。實(shí)時(shí)模擬的目的是監(jiān)測(cè)管網(wǎng)在一個(gè)時(shí)段內(nèi)運(yùn)行狀態(tài)的總體效益和費(fèi)用,為管網(wǎng)用戶調(diào)度提供決策依據(jù),評(píng)價(jià)管網(wǎng)總體運(yùn)行效果。實(shí)時(shí)模擬的基本方法是將分時(shí)段變化的用水量作為擬動(dòng)態(tài)數(shù)據(jù),對(duì)不同時(shí)段(3天,72小時(shí))的運(yùn)行狀態(tài)進(jìn)行平差計(jì)算,最后對(duì)總模擬時(shí)期的計(jì)算結(jié)果進(jìn)行匯總、評(píng)價(jià)和決策。除此之外,還可以進(jìn)行管網(wǎng)系統(tǒng)的工況校核及可靠性分析。
管網(wǎng)運(yùn)行優(yōu)化調(diào)度計(jì)算
在不同時(shí)段的供水需求條件下,通過泵站供水量變化求解二級(jí)泵站供水量,對(duì)各泵站中的水泵進(jìn)行優(yōu)化運(yùn)行組合,調(diào)整各水廠的出水量和出水壓力,幫助制定更為科學(xué)合理的調(diào)度計(jì)劃和調(diào)度方案,改善管網(wǎng)中水流狀況,降低爆管的概率,達(dá)到常年供水動(dòng)力費(fèi)用最小化,提高供水服務(wù)水平。
管網(wǎng)優(yōu)化設(shè)計(jì)計(jì)算
在建立經(jīng)濟(jì)模型和優(yōu)化計(jì)算數(shù)學(xué)模型,提出多個(gè)約束條件后,通過一定的數(shù)學(xué)算法,得出經(jīng)濟(jì)合理的管徑及水泵揚(yáng)程。目的主要是為了進(jìn)行新建或擴(kuò)建管網(wǎng)的規(guī)劃設(shè)計(jì)和初步設(shè)計(jì),使其達(dá)到在投資(管徑)及常年運(yùn)行費(fèi)用(水泵揚(yáng)程)最小的情況下,滿足用戶對(duì)水量和水壓的要求。
用水量預(yù)測(cè)
是根據(jù)過去用戶用水量的歷史數(shù)據(jù)進(jìn)行相關(guān)分析后找出各個(gè)用戶區(qū)域最主要用水相關(guān)的參數(shù)和時(shí)變特性,建立模型,在此基礎(chǔ)上做出用戶用水量的短期、中期和長(zhǎng)期預(yù)測(cè),從而編制出用戶日、月和年的用水計(jì)劃。
擴(kuò)展資料:
表達(dá)方式
水力計(jì)算成果表達(dá):主要有三種形式,一種是繪制CAD工程圖,包括給水管網(wǎng)平差結(jié)果圖和等水壓線圖。它是在保證計(jì)算結(jié)果接近實(shí)際情況的前提下,對(duì)管線進(jìn)行簡(jiǎn)化的圖形,圖中對(duì)節(jié)點(diǎn)、管段、泵站等的計(jì)算結(jié)果進(jìn)行詳細(xì)標(biāo)注。
第二種是圖形顯示功能,根據(jù)數(shù)據(jù)庫繪制實(shí)時(shí)曲線圖和歷史趨勢(shì)線圖,如各時(shí)段管段流量曲線圖、各時(shí)段節(jié)點(diǎn)水量需求曲線圖等。
第三種表達(dá)形式是以統(tǒng)計(jì)報(bào)表形式顯示各管段、節(jié)點(diǎn)、泵站等的歷史和當(dāng)前數(shù)據(jù)。水力計(jì)算結(jié)果均可由打印機(jī)輸出。
參考資料來源:百度百科-水力計(jì)算
二、【急求】【水廠設(shè)計(jì)】二沉池 進(jìn)水管和出水管的流速要求
進(jìn)出、水管的管徑是按經(jīng)驗(yàn)值設(shè)計(jì)的,一般二沉池的進(jìn)水管流速按0.4m/s,還要考慮污泥回流的水量;出水管按07.-1.0m/s計(jì)算就好!水力坡降可暫不考慮。
三、無縫鋼管理論重量表大全及計(jì)算方法
對(duì)于鋼管相信大家都知道,在房子建造或裝修等中我們都可以見到,除此之外無縫鋼管還有很多其他的用途,今天小編和大家分享的是無縫鋼管理論重量表大全及計(jì)算方法:
什么是無縫鋼管?
無縫鋼管具有中空截面,大量用作輸送流體的管道,如輸送石油、天然氣、煤氣、水及某些固體物料的管道等。鋼管與圓鋼等實(shí)心鋼材相比,在抗彎抗扭強(qiáng)度相同時(shí),重量較輕,是一種經(jīng)濟(jì)截面鋼材,廣泛用于制造結(jié)構(gòu)件和機(jī)械零件,如石油鉆桿、汽車傳動(dòng)軸、自行車架以及建筑施工中用的鋼腳手架等用鋼管制造環(huán)形零件,可提高材料利用率,簡(jiǎn)化制造工序,節(jié)約材料和加工工時(shí),如滾動(dòng)軸承套圈、千斤頂套等,已廣泛用鋼管來制造。
無縫鋼管理論重量表大全:
外徑 mm壁厚mm
0.500.600.801.01.21.41.51.61.82.02.22.52.83.03.2
每米重量kg
60.070.080.100.120.140.160.170.170.190.20
70.080.100.120.150.170.190.200.210.230.250.260.28
80.090.110.140.170.200.230.240.250.280.300.320.34
90.110.120.160.200.230.260.280.290.320.350.370.400.43
100.120.140.180.220.260.300.310.330.360.400.420.460.500.520.54110.130.150.200.250.290.330.350.370.410.440.480.520.570.590.62120.140.170.220.270.320.370.390.410.450.490.530.590.640.670.69130.150.180.240.300.350.400.430.450.500.540.590.650.700.740.77140.170.200.260.320.380.440.460.490.540.590.640.710.770.810.85150.180.210.280.350.440.470.500.530.590.640.690.770.840.890.93160.190.230.300.370.440.500.540.570.630.690.750.830.910.961.01170.200.240.320.400.470.540.570.610.680.740.800.890.981.041.09180.220.260.340.420.500.570.610.650.720.790.860.961.051.111.17190.230.270.360.440.530.610.650.690.760.840.911.021.121.181.25200.240.290.380.470.560.640.680.730.810.890.971.081.191.261.33210.250.300.400.490.590.680.720.770.850.941.021.141.261.331.41220.270.320.420.520.620.710.760.850.941.041.131.271.391.481.56230.280.330.440.540.650.750.800.850.941.041.131.271.391.481.56240.290.350.460.570.680.790.830.890.991.091.181.331.461.551.64250.300.360.480.590.700.820.870.921.031.131.241.391.531.631.72270.330.390.520.640.760.880.941.001.131.231.341.511.671.781.88280.340.410.540.670.790.920.981.041.161.281.401.571.741.851.96290.350.420.560.690.820.951.021.081.211.331.451.631.811.922.04300.360.440.580.720.850.991.051.121.251.381.511.701.882.002.12320.390.470.620.770.911.061.131.201.341.481.621.822.022.152.27340.410.500.660.810.971.131.201.281.431.581.721.942.152.292.43350.430.510.640.841.001.161.241.321.471.631.782.002.222.372.51360.440.520.700.861.031.201.281.361.521.681.832.072.292.442.59380.460.550.730.911.091.261.351.441.611.781.942.192.432.592.75400.490.580.770.961.151.331.421.521.691.872.052.312.572.742.9042
1.011.211.401.501.601.791.972.162.442.712.893.0644.5
1.071.281.491.591.691.902.102.292.592.883.073.2645
1.091.301.511.611.711.922.122.322.622.913.113.3048
1.161.391.611.721.832.052.272.482.813.123.333.5450
1.211.141.681.791.912.142.372.592.933.263.483.7051
1.231.471.711.831.952.182.422.562.993.333.553.7753
1.281.531.781.912.032.272.522.763.113.473.703.9354
1.311.561.821.942.072.322.562.813.183.543.774.0156
1.361.621.892.022.152.412.662.923.303.673.924.1757
1.381.651.922.052.192.452.712.973.363.744.004.2560
1.461.742.022.162.312.582.863.143.553.954.224.4863
1.531.832.132.272.422.723.013.303.734.164.444.7265
1.581.892.202.352.502.813.113.413.854.294.594.8868
1.651.982.302.462.622.933.263.574.044.494.815.1270
1.702.042.372.532.703.033.353.684.164.654.965.2873
1.782.122.472.642.823.163.503.844.354.845.185.52
無縫鋼管理論重量計(jì)算方法:
計(jì)算常用型材理論重量計(jì)算公式:m=F×L×ρ
m—質(zhì)量Kg ;F—斷面積m2 ;L—長(zhǎng)度m ;ρ—密度*Kg/m3
其中:F斷面積計(jì)算方法:
1、方鋼F= a2
2、鋼管 F=3.1416×$(D-$) D—直徑 $—厚度
3、鋼板、扁鋼 F= a×$ a—寬度
密度:
鋼材:7.85*103 kg/m3
鋁:2.5~2.95*103
銅:8.45~8.9*103
鑄鐵:6.6~7*103
尼龍:1.04~1.15*103
無縫鋼管理論重量表大全及計(jì)算方法的相關(guān)內(nèi)容就和大家分享到這里了,更多信息請(qǐng)大家繼續(xù)關(guān)注土巴兔學(xué)裝修。
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四、給水計(jì)算,沿程損失i的單位是(mm/m)還是(kpa/m)?,如何換算?
h=i×l
i就是單位長(zhǎng)度上的水頭損失
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