給水泵站改造畢業(yè)論文

1、河海大學(xué)文天學(xué)院畢業(yè)論文說(shuō)明書(shū)課題：給水泵站改造學(xué)號(hào)：08013131班級(jí)：08屆給排水一班姓名：濮靈宏校外指導(dǎo)老師：張紹同校內(nèi)指導(dǎo)老師：章欽目錄一、設(shè)計(jì)目的及要求.2二、設(shè)計(jì)說(shuō)明書(shū).3一設(shè)計(jì)資料及參數(shù).3三、設(shè)計(jì)計(jì)算4一、設(shè)計(jì)流量和設(shè)計(jì)揚(yáng)程的計(jì)算.4二、初選泵和電機(jī).4三、泵機(jī)組的基礎(chǔ)和水泵間布置.5四、吸水管和壓水管管徑的計(jì)算.7五、吸水井的計(jì)算.9六、水泵房安裝高度.11七、輔助設(shè)備設(shè)計(jì).11四、設(shè)計(jì)小結(jié)13五、參考文獻(xiàn)14六、泵房平面草圖15一、設(shè)計(jì)目的及要求（一）設(shè)計(jì)目的（1）使學(xué)生所獲得的專業(yè)理論知識(shí)加以系統(tǒng)化，整體化，以便于鞏固和擴(kuò)大所學(xué)的專業(yè)知識(shí)；（2）培養(yǎng)學(xué)生獨(dú)立分析，解決實(shí)

2、際問(wèn)題的能力；（3）提高設(shè)計(jì)計(jì)算技巧和編寫(xiě)說(shuō)明書(shū)及繪圖能力；（4）為適應(yīng)工作需要打一下的基礎(chǔ)。培養(yǎng)學(xué)生具有一定的泵站設(shè)計(jì)能力同過(guò)課程設(shè)計(jì)，使學(xué)生進(jìn)一步將所學(xué)的基礎(chǔ)理論、基礎(chǔ)技能綜合的運(yùn)用與設(shè)計(jì)實(shí)踐，熟悉設(shè)計(jì)方法和步驟。（二）設(shè)計(jì)要求1、了解和掌握泵站設(shè)計(jì)的一般方法和步驟，具備獨(dú)立進(jìn)行泵站設(shè)計(jì)的能力。2、熟悉水泵選型的基本原則，掌握水泵并聯(lián)特性曲線的繪制方法，學(xué)會(huì)通過(guò)方案對(duì)比確定最佳的水泵工作組合。3、學(xué)會(huì)水泵站設(shè)計(jì)過(guò)程中設(shè)計(jì)圖紙的表達(dá)方法，掌握其關(guān)鍵問(wèn)題。4、提高學(xué)生綜合運(yùn)用所學(xué)的理論知識(shí)分析問(wèn)題，通過(guò)查閱資料解決實(shí)際問(wèn)題的能力。成果：1設(shè)計(jì)說(shuō)明書(shū)一份（包括計(jì)算），要求書(shū)面整潔、文理通順、論證

3、合理、層次分明、計(jì)算無(wú)誤。2設(shè)計(jì)圖紙兩張：要求布置合理、圖面整潔、按繪圖規(guī)定制圖。二、設(shè)計(jì)說(shuō)明書(shū)一設(shè)計(jì)資料及參數(shù)某鋼廠經(jīng)過(guò)平面布置及管網(wǎng)平差計(jì)算得到如下資料：1正常供水工況時(shí)所需流量為q1 9000 m/d ，泵站外管道水頭損失h1_14.6m_,服務(wù)水頭為h1= 28m ；2向高位水池轉(zhuǎn)輸供水工況時(shí)，所需流量為q2 4900m/d ，這時(shí)泵站外管道水頭損失為h2_3.5m_，自由水頭為h2= 15m ；3正常工作時(shí)間為16小時(shí)，轉(zhuǎn)輸工作時(shí)間為8小時(shí)；4泵站所在地海拔標(biāo)高為1034m，清水池最低水面標(biāo)高為1030.6m，最高水面標(biāo)高為1033.6m，供水點(diǎn)地面標(biāo)高為1046.7m，高位水池最高

4、水面標(biāo)高為h3= 1071.4 ；5.距泵站最近的下水井比泵站外地平面低4.2m，相距10m；6該地為級(jí)非自重性濕陷性黃土，地下水位低于地面標(biāo)高10m，場(chǎng)內(nèi)已有兩路滿足要求的兩路獨(dú)立電源路通向泵站，冰凍深度為地表下0.5m；7該廠要求不間斷供水；三、設(shè)計(jì)計(jì)算一、設(shè)計(jì)流量和設(shè)計(jì)揚(yáng)程的計(jì)算1.設(shè)計(jì)流量的計(jì)算, 取自用水系數(shù)=1.05正常供水工況時(shí)，所需最大時(shí)流量為q=90001.0516=590.625m/h=164.0625向高位水池轉(zhuǎn)輸供水工況時(shí)，所需最大時(shí)流量為q=49001.058=643.125m/h=178.646l/s二者取最大值即q=643.125m/h2.設(shè)計(jì)揚(yáng)程的計(jì)算由設(shè)計(jì)指導(dǎo)

5、書(shū)中設(shè)計(jì)揚(yáng)程的計(jì)算公式，得：h=1071.41030.6153.521.05=64.365m二、初選泵和電機(jī)1.選泵的主要依據(jù)：流量、揚(yáng)程以及其變化規(guī)律 大小兼顧，調(diào)配靈活 型號(hào)整齊，互為備用 合理地用盡各水泵的高效段要近遠(yuǎn)期相結(jié)合?！靶”么蠡A(chǔ) ”大中型泵站需作選泵方案比較。根據(jù)設(shè)計(jì)流量和設(shè)計(jì)揚(yáng)程，從給排水設(shè)計(jì)手冊(cè)第11冊(cè)常用設(shè)備第二版中查表，選泵：方案一：選擇四臺(tái)is125-100-250型泵，三臺(tái)工作一臺(tái)備用，滿足最大用水工況的要求。方案二：選擇五臺(tái)is125-100-315b型泵，四臺(tái)工作一臺(tái)備用，滿足最大用水工況的要求。方案比較：方案一：is125-100-250型泵性能如下：流量2

6、40m/h，揚(yáng)程72m，轉(zhuǎn)速2900r/min，軸功率62.8kw，折損率取0.9。得最大供水流量q=24030.9=648m/h，揚(yáng)程為72方案二：is125-100-315b型泵性能如下：流量181.6m/h, 揚(yáng)程103m，轉(zhuǎn)速2900r/min，軸功率69.8kw，折損率取0.9。得最大供水流量q=181.640.9=653.76m/h，揚(yáng)程為103方案二較方案一，流量和揚(yáng)程都較大，方案一的流量和揚(yáng)程均已滿足管路要求，采用方案二會(huì)對(duì)能源造成浪費(fèi)，且方案一備用一臺(tái)相同功率和型號(hào)的水泵，考慮到了遠(yuǎn)期的發(fā)展，故采用方案一。2.電機(jī)的選擇電動(dòng)機(jī)型號(hào)經(jīng)查表選定280s-2型。電動(dòng)機(jī)主要性能參數(shù)如

7、下：額定工作電壓380v，功率75w，氣蝕余量4.5m，重量165kg。三、泵機(jī)組的基礎(chǔ)和水泵間布置1.泵機(jī)組的基礎(chǔ)查表得，底座長(zhǎng)l1=1.83m，底座螺孔間距b=0.73m，底座地腳螺釘?shù)闹睆絛=0.028m，底座地腳螺釘?shù)拈L(zhǎng)度l=20d=0.56m。得基礎(chǔ)長(zhǎng)度l= l1+0.18=2m 基礎(chǔ)寬度b=0.73+0.17=0.9m 基礎(chǔ)高度h=0.56+0.14=0.7m 基礎(chǔ)深度的校核 h=3w/lb h:基礎(chǔ)的深度 w:機(jī)組的總重量，w=180+165=345kg l:基礎(chǔ)的長(zhǎng)度 b:基礎(chǔ)的寬度 :基礎(chǔ)所用材料的容重，對(duì)于混凝土基礎(chǔ)，=1855kg/ m3 經(jīng)計(jì)算可知h=456mm。所以基

8、礎(chǔ)的深度滿足。2.水泵間布置 根據(jù)設(shè)計(jì)指導(dǎo)書(shū)，要求機(jī)組的布置在水泵臺(tái)數(shù)不多時(shí)(不超過(guò)6臺(tái))，最好采用單行排列。機(jī)組布置應(yīng)滿足下列要求：（市外給水設(shè)計(jì)規(guī)范gb50013-2006） 臥式水泵和小葉輪立式水泵機(jī)組的布置應(yīng)遵守下列規(guī)定： a單排布置時(shí)，相鄰兩個(gè)機(jī)組及機(jī)組與墻壁間凈距 電機(jī)容量55千瓦時(shí)， 1.0米； 電機(jī)容量55千瓦時(shí)， 1.2米。b還應(yīng)保證泵軸和電機(jī)轉(zhuǎn)子在檢修時(shí)能拆卸。 c泵房主要通道不小于l .2米。 d當(dāng)考慮就地檢修時(shí)，至少在每個(gè)機(jī)組一側(cè)設(shè)置大于水泵機(jī)組寬度0.5米的通道。二級(jí)泵站一般為地面或半地下式，平面形狀一般采用矩形。房屋面積大小可根據(jù)機(jī)組及管道布置所必須的間距確定，但考

9、慮到二泵站運(yùn)轉(zhuǎn)調(diào)度較頻繁，所以泵站面積應(yīng)略為寬裕些，站內(nèi)除機(jī)組管道外尚須設(shè)置儀表臺(tái)，配電盤(pán)和開(kāi)關(guān)箱以及其它輔助設(shè)備、機(jī)組設(shè)備、管道之間距離應(yīng)符合規(guī)范要求。站內(nèi)面積應(yīng)滿足小修要求，半地下式泵站可以專設(shè)一走道平臺(tái)。故機(jī)組的布置采用的橫向排列的方式，；四臺(tái)泵的轉(zhuǎn)向均為正常的轉(zhuǎn)向。每臺(tái)泵有單獨(dú)的吸水管和壓水管，壓水管引出泵房之后兩兩相連起來(lái)。泵吸水管上設(shè)有手動(dòng)閘板閥，壓水管路上設(shè)有蝶閥和止回閥。由規(guī)范得：水泵間間距為1.5m，水泵距墻2m。具體其他尺寸如附頁(yè)泵房平面草圖。四、吸水管和壓水管管徑的計(jì)算1、吸水管管徑的計(jì)算根據(jù)課程設(shè)計(jì)任務(wù)指導(dǎo)書(shū)，吸水管管徑應(yīng)根據(jù)泵的最大抽水量及設(shè)計(jì)流速?zèng)Q定。最大抽水量是指

10、該泵在單獨(dú)工作或并聯(lián)中可能出現(xiàn)的最大出水量，設(shè)計(jì)流速根據(jù)室外給水設(shè)計(jì)規(guī)范gb50013-2006可按下述數(shù)據(jù)決定： d250mm v采用1.01.2m/s； d=2501000mm v采用1.21.6m/s； d1000mm v采用1.52.0m/s。q=d/4v，在本設(shè)計(jì)中，q=240m/h=0.0667m/s，依據(jù)室外給水設(shè)計(jì)規(guī)范gb50013-2006：當(dāng)v取1.01.2m/s時(shí)，d的范圍是265291。不符合要求。當(dāng)v取1.21.6m/s時(shí)，d的范圍是230265。符合要求。當(dāng)v取1.52.0m/s時(shí)，d的范圍是206237。不符合要求。所以，取水管dn取300mm。鋼管由于該泵站系自

11、灌式泵站，故吸水管路需設(shè)閘閥。2、壓水管管徑的計(jì)算當(dāng)水泵為自灌式時(shí)，設(shè)計(jì)流速可增至1.62.0m/s。壓水管管徑按通過(guò)的最大流量及設(shè)計(jì)流速?zèng)Q定，設(shè)計(jì)流速可按下述數(shù)據(jù)決定： dq 所以選前者另外，一般吸水管從專設(shè)的吸水池或直接從清水池吸水（必須注意應(yīng)該從能分成完全隔開(kāi)的兩個(gè)獨(dú)立的吸水池或清水池中吸水)，每臺(tái)泵有一條獨(dú)立的吸水管，為避免水頭損失，吸水管從泵房直接伸入吸水井，考慮吸水管邊緣距吸水井邊緣的距離，則設(shè)吸水井長(zhǎng)度為13m，尺寸如泵站平面草圖，寬度和高度不變。將吸水井從中間分成二格，用虹吸管連通，以便分隔清洗使用六、水泵房安裝高度為了便于施工，將泵房機(jī)器間底板的標(biāo)高和吸水間的底板的標(biāo)高相同，

12、因此泵為自灌式工作，所以泵的安裝高度小于其允許吸上真空高度，無(wú)須計(jì)算。泵站所在地海拔標(biāo)高為1034m，清水池最低水面標(biāo)高為1030.6m，最高水面標(biāo)高為1033.6m。故該泵站為半地下式泵站，泵站地面標(biāo)高為1032 m。根據(jù)設(shè)計(jì)指導(dǎo)書(shū)，泵站高度應(yīng)滿足設(shè)備起吊要求，在無(wú)起重設(shè)備時(shí)，泵房高度應(yīng)不小于3米。由于本泵站不設(shè)起重設(shè)備，考慮到通風(fēng)及采光的要求，所以泵房高度取6m。七、輔助設(shè)備設(shè)計(jì) 1）起重設(shè)備 由于本泵站不設(shè)起重設(shè)備，該部分無(wú)需考慮 2）引水設(shè)備 泵系自灌式工作，無(wú)須引水設(shè)備。3）排水設(shè)備 由于泵房較深，所以采取電動(dòng)泵排水。沿泵房?jī)?nèi)壁設(shè)的排水溝至集水坑內(nèi)，然后又泵抽回到吸水間去。 取水泵房

13、的排水量按2040m3/d計(jì)算，排水泵的靜揚(yáng)程為11.5m計(jì)算，水頭損失按3m計(jì)，故總揚(yáng)程h=11.5+3=14.5m,可選用is65-50-160型離心泵。數(shù)量為兩臺(tái)，一臺(tái)使用，另一臺(tái)備用。配套電機(jī)為y100l-2。4）通風(fēng)設(shè)備 由于與泵配套的電機(jī)為水冷式，無(wú)需專門(mén)的通風(fēng)設(shè)備進(jìn)行冷卻，但由于泵房筒體較深，仍選用風(fēng)機(jī)進(jìn)行通風(fēng)換氣。選用一臺(tái)型號(hào)為t35-11型軸流風(fēng)機(jī)即可。5）計(jì)量設(shè)備 在兩根主壓水管上各設(shè)一個(gè)水表。6）壓水管路配件設(shè)置在水管路上的常開(kāi)閥門(mén)，采用 pq371h-40型蝶閥，其規(guī)格為：250s39： dn300,l=325,w=100kg , =0.15 蝶閥 采用dx7k41x-

14、10型液控緩閉蝶閥，其規(guī)格為： 250s39： dn250,l=165,w=516 kg , =0.15 同心漸擴(kuò)管 壓水管路上的漸擴(kuò)管規(guī)格如下：250s39：dn250 300, l=250, =0.05斜三通管dn300,l=700, =0.5直三通管dn300,l=620, =1.590彎頭250s39: dn250, =0.8 四、設(shè)計(jì)小結(jié)通過(guò)這次水泵及水泵站的課程設(shè)計(jì)，從查閱資料到請(qǐng)教老師，我從中學(xué)到了很多，也發(fā)現(xiàn)了自己的不足之處：由于沒(méi)有充分準(zhǔn)備資料，設(shè)計(jì)中的一些數(shù)據(jù)（如管道的摩阻系數(shù)、彎管的局部水頭損失系數(shù)等）沒(méi)有正確按照規(guī)范設(shè)計(jì)查找，而是通過(guò)已知的數(shù)據(jù)，根據(jù)內(nèi)差法求出的，可能存

15、在很大的誤差，導(dǎo)致該泵站設(shè)計(jì)存在一些問(wèn)題。所以在以后的學(xué)習(xí)和設(shè)計(jì)中，我除了會(huì)更加注重培養(yǎng)自己的設(shè)計(jì)意識(shí)外，還要更加注重相關(guān)資料、信息的收集，考慮問(wèn)題更詳細(xì)，分析問(wèn)題更仔細(xì)?？傊?，在這次課程設(shè)計(jì)中，充分暴露了自己設(shè)計(jì)的薄弱環(huán)節(jié)和自己對(duì)所學(xué)知識(shí)的掌握還不夠堅(jiān)固。五、參考文獻(xiàn)1姜乃昌主編.水泵及水泵站(m)(第五版).北京：中國(guó)建筑工業(yè)出版社，2008，122給水排水設(shè)計(jì)手冊(cè)第1、5、10、11冊(cè)。3.中國(guó)市政工程西南設(shè)計(jì)研究院主編.給水排水設(shè)計(jì)手冊(cè)(m)（第二版第1冊(cè)）.北京：中國(guó)建筑工業(yè)出版社，2000，104.上海市政工程設(shè)計(jì)研究院主編.給水排水設(shè)計(jì)手冊(cè)(m)（第二版第3冊(cè)）.北京：中國(guó)建筑工

16、業(yè)出版社，2004，45.中國(guó)市政工程西北設(shè)計(jì)研究院主編.給水排水設(shè)計(jì)手冊(cè)(m)（第二版第11冊(cè)）.北京：中國(guó)建筑工業(yè)出版社，2002，66.中國(guó)市政工程華北設(shè)計(jì)研究院主編.給水排水設(shè)計(jì)手冊(cè)(m)（第二版第12冊(cè)）.北京：中國(guó)建筑工業(yè)出版社，2001，67.上海市建設(shè)和交通委員會(huì)主編.室外給水設(shè)計(jì)規(guī)范（gb50013-2006）.北京：中國(guó)計(jì)劃出版社，2006，48.中華人民共和國(guó)水利部主編.泵站設(shè)計(jì)規(guī)范（gb/t 50265-97）.北京：中國(guó)計(jì)劃出版社，2006，3directoryfirst, the design objectives and requirements . 2secon

17、d, the design specification . 3 the design data and parameters . 3third, the design calculation . 4, the calculation of the design flow and design head . 4, the primary pump and motor . 4, the pump unit and pump arrangement . 5, the suction pipe and pressure pipe diameter calculation . 7, absorbent

18、wells calculation . 9, pump house installation height . 11, the design of auxiliary equipment . 11design summary . 13reference . 14, pumping stations, flat sketches . 15design objectives and requirements(a) is designed to(1) professional theoretical knowledge gained by the students to be systematic,

19、 holistic, in order to consolidate and expand the professional knowledge;(2) students independent analysis, the ability to solve practical problems;(3) improve the design and calculation skills and the preparation of instructions and graphics capabilities;(4) for adaptation need to play to the found

20、ation. the pumping station design students with curriculum design, to enable students to further learn the basic theory, basic skills to use and design practice, familiar with design methods and procedures.(b) the design requirements1, to understand and master the methods and steps of the pump stati

21、on design, the ability to independently pump station design.2, familiar with the basic principles of pump selection, to master the drawing method of characteristic curves of pumps in parallel, learn through the program compared to determine the best combination of pump.3, society of pump station des

22、ign process, design drawings of the expression, to grasp the key issues.4, to improve the students apply the theoretical knowledge to analyze issues, and the ability to solve practical problems through access to information.results: 1. design a manual (including computing), requiring written tidy, a

23、rts and fluent, rational argument, structured, the calculation is correct.two. design drawings of two: the reasonable layout, drawing clean, by drawing provisions mapping.second, the design specificationa design data and parametersin a steel pipe network adjustment after the layout calculated by the

24、 following information:a. normal water supply conditions required flow for q1 = 9000 m / d, pumping stations outside the pipeline head loss h1 = _14.6m_, head of services for h1 = 28m;two. transfer of the water supply to the high pool conditions, the required flow for q2 = 4900m / d, when the pumpin

25、g station outside the pipe head loss h2 = _3.5m_ free head h2 = 15m;3. the normal working hours to 16 hours, and the transshipment time is 8 hours;4. pumping station location of elevation elevation of 1034m, the minimum clear pool water surface elevation of 1030.6m, the maximum water surface elevati

26、on of 1033.6m, water points, ground elevation 1046.7m, the maximum water surface elevation of the high pool h3, = 1071.4;(5) from the pumping station wells than pumping stations in the field of flat low 4.2m distance of 10m;6. the collapsible loess ground level ii non-weight wet, the water table bel

27、ow the ground elevation of 10m, the venue has a two-way meet the requirements of the two independent power road that leads to the pumping station, the freezing depth of the surface 0.5m;7. the plant requires continuous water supply;third, the design calculations, the calculation of the design flow a

28、nd design heada design flow calculations, taken from the water coefficient alpha = 1.05normal supply conditions, the required maximum flow rate of q = 9000 1.05 16 = 590.625m / h = 164.0625transfer of the water supply to the high pool conditions, the required maximum flow rate of q = 4900 1.05 8 = 6

29、43.125m / h = 178.646l / swhichever is the maximum q = 643.125m / hcalculation of the design headguidance by the design formula of the book design head, too:h = (1071.4-1030.6 +15 +3.5 +2) 1.05 = 64.365m, primary pump and motor(1) the main basis for selecting a pump: flow, head, and its variation si

30、ze into account, and flexible deployment model neat, mutual backupand reasonably efficient segment of the exhaustion of all pumps to short and long term the combination. small pump base and medium-sized pumping stations required for pump selection program comparison.according to the design flow and

31、design head, look-up table from the second edition of the water supply and drainage design manual 11 commonly used equipment, selecting a pump:option one:four is125-100-250 pump, a spare of the three work to meet the requirements of the maximum water conditions.option two:five is125-100-315b pump, a

32、 spare four working to meet the requirements of the maximum water conditions.program: option one: is125-100-250 pump performance are as follows: flow rate 240m / h, head 72m, speed 2900r/min, shaft power 62.8kw, the breakage rate of 0.9. the largest water flow of q = 240 3 0.9 = 648m / h, and the he

33、ad 72option ii: is125-100-315b pump performance are as follows: the flow of 181.6m / h, lift 103m, speed 2900r/min, shaft power 69.8kw, the breakage rate of 0.9. the largest water flow of q = 181.6 4 0.9 = 653.76m / h, the head of 103option ii are larger than the program flow and head, flow and head

34、 of the program have been met piping option two would be energy wastage and program a spare one the same power and pump models, taking into account the development of long-term, so the use of the program.(2) the choice of motormotor model selected by table look-up the 280s fingerless-2. motor perfor

35、mance parameters are as follows: the rated working voltage of 380v power 75w, cavitation margin 4.5m, weight 165kg., the basis of the pump units and pump arrangementa pump unit basislook-up table, the base length l1 = 1.83m, the base screw spacing b = 0.73m, the base ground screw diameter d = 0.028m

36、, the base ground screw length l = 20d = 0.56m.have the basis of length l = l1 +0.18 = 2mfoundation width b = 0.73 +0.17 = 0.9mthe basis of height of h = 0.56 +0.14 = 0.7mcheck foundation depthh = 3w / l x b of h: the depth of the basisw: total weight of the unit, w = 180 +165 = 345kgl: the basis of

37、 the length of theb: based on the width: basic bulk density of the materials used for the concrete foundation, = 1855kg / m3calculation shows that h = 456mm. based on the depth to meet.2 pumps furnished the arrangement according to the design guide book, asked the crew in the limited number of pump

38、units (not more than 6), preferably in a single row. the unit should be arranged to meet the following requirements: (outside the city water supply design specification gb50013-2006)horizontal vertical pumps and small impeller pump unit should be arranged to comply with the following provisions: a.

39、single row layout, the spacing between two adjacent units and units with wall motor capacity 55 kwh, and 1.0 m; motor capacity of 55 kwh, and 1.2 m.b. should also ensure that the pump shaft and motor rotor can be removed in maintenance. c. pumping station, the main channel of not less than 1 .2 m. d

40、. when considering the in situ repair, or at least set in each unit side of the channel of 0.5 m greater than the width of the pump unit.two pumping stations are generally ground or semi-underground, the plane shape is generally rectangular. housing size can be determined according to the spacing un

41、it and piping layout must, but considering the two pumping station operation scheduling more frequent, so the pumping station area should be somewhat well-off some stations in addition to the unit pipeline yet to set the instrument sets, power strips and switch boxes, and other auxiliary equipment,

42、unit equipment, pipe distance should meet the specification requirements. station area should meet the requirements of minor repairs, semi-underground pumping station can be dedicated to a walkway platform.so the unit layout used horizontally; the turn of the four pumps are normal steering. each pum

43、p has a separate suction pipe and pressure pipes, pressure pipes lead to the pumping station after two two connected together. the pump suction pipe is equipped with a manual gate valve, the pressure of water on the road has a butterfly valve and check valve.get by the specification: the pump spacin

44、g of 1.5 m, water pump away from the wall of 2m. specific dimensions such as attached to the plane sketch of the page pumping station., the suction pipe and pressure pipe diameter calculationa suction pipe diameter of the calculationcurriculum design task instructions, the diameter of the suction pi

45、pe should be determined according to the pumps maximum pumping capacity and design flow rate. the maximum pumping capacity refers to the pump may work alone or in parallel to the maximum amount of water, the design flow rate according to the following data to determine according to the outdoor water

46、 supply design specifications gb50013-2006: d 250mm v 1.0 1.2m / s; the d = 250 1000mm v 1.2 1.6m / s; d 1000mm v the 1.5 2.0m / s.q = d / 4 v,in this design, the q = 240m / h = 0.0667m / s, according to the outdoor water supply design specifications gb50013-2006:when v 1.0 1.2m / s, d range is 265

47、291. not meet the requirements.when v take 1.2 1.6m / s, d in the range 230 to 265. meet the requirements.when v take 1.5 2.0m / s, d in the range 206 237. not meet the requirements.therefore, the intake pipe dn take 300mm. steel pipesince the pumping station is from the irrigation pump station, so

48、the the absorbent pipeline to be located valve.2, the calculation of the pressure pipe diameterwhen the pump when the self-filling type, the design flow rate can be increased to 1.6 2.0m / s.pressure water pipe diameter is determined by the maximum flow and design flow, design flow rate according to

49、 the following data to determine: d 250mm v l .5 2. 0m / s,; the d = 250 1000mm v 2.0 to 2.5m / s; the d 1000mm v the use of 2.0 3.0m / s,. total pressure water pipe diameter determined according to the above principles within the pumping station, water pipes diameter of decisions outside the statio

50、n. related to the pump suction pressure water pipeline design and layout of the reference book 166 174 or manual 3 376 394 layout.when v take 1.5 2.0m / s, d in the range 206 237. meet the requirements.when v take 2.0 2.5m / s, d in the range 184 206. not meet the requirements.when v take 2.0 3.0m / s, d in the range 168 to 184. not meet the requirements.pressure pipes dn take 250m