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1、Key Factors for PS Design泵站设计关键因素 Installation安装位置安装位置Inside/outside, on or below the floor, etc. 室内室内/室外，室外， 地面地面/地下等地下等Size of the installation 安装尺寸安装尺寸 Wastewater, rainwater flow, Head 污废水，雨水的流量、扬程污废水，雨水的流量、扬程Material 材料材料Concrete, fibre glass, polyethylene, etc混凝土、玻璃钢或聚乙烯等混凝土、玻璃钢或聚乙烯等Requested e
2、quipments设备要求设备要求Screen, separate valve chamber, level switch, etc.格栅、独立阀门井、液位开关等格栅、独立阀门井、液位开关等Before we can select the right pumping station, we need to know?在泵站设计前，我们需要知道？Basic process of PPS design 泵站设计基本步骤Pump design finished泵站设计完成Pump selection选泵Designed inflow, head设计入流流量、扬程Related information
3、 collection相关信息收集Elevation of ground, inlet and discharge地面、进出水管标高Confirm effective Volume确定有效容积Confirm stop level确定停泵水位Confirm start/stop number确定启动次数Confirm distance between start and stop level确定启停液位距离Tank diameter井筒直径Sizing of wastewater pumping station 污废水泵站尺寸Minimum volume最小容积最小容积Effective vol
4、ume有效容积有效容积1234Ground level 地面标高地面标高56Top cover顶盖顶盖Discharge port出水出水端端Alarm level报警液位报警液位Inlet port 进水端进水端Start level启动液位启动液位Bottom底部底部Stop level停泵液位停泵液位The depth of the minimum volume must be high enough to avoid the pump sucking air最小容积高度应该避免水泵吸入空气最小容积高度应该避免水泵吸入空气Direct fall from the inlet should
5、 be minimized to avoid air in the pump进水管跌水高度最小化，避免水泵吸入空气进水管跌水高度最小化，避免水泵吸入空气Maximum velocity of water intake : 1,2 m/s最大入流流速最大入流流速1,2 m/sInclined bottom (45 to 60)（PUST）底部倾斜底部倾斜(45 to 60)(PUST)1 - Minimum volume最小容积Baffle缓冲高度缓冲高度Minimum volume最小容积最小容积1Bottom 底部底部Stop level 停泵液位停泵液位Minimum diameter a
6、t the bottom （PUST）increases the water velocity and facilitate the pumping of solid matters底部直径缩小底部直径缩小(PUST)增加了水的流速，有利于泵送增加了水的流速，有利于泵送固体介质固体介质Minimum stop level for SE1/SEV with stainless steel jackets is just above the pump housing不锈钢外壳的不锈钢外壳的 SE1/SEV的最低停泵液位为水泵的最低停泵液位为水泵涡壳以上涡壳以上For other pumps: St
7、op level at least in the middle of the motor对于其他的水泵对于其他的水泵：停泵液位最低至电机的中部：停泵液位最低至电机的中部1 - Minimum volume最小容积Baffle缓冲高度缓冲高度1Minimum volume最小容积最小容积Bottom 底部底部Stop level 停泵液位停泵液位It is very important to get the distance between start and stop right.启启/停液位之间的距离非常重要停液位之间的距离非常重要The start level and stop level
8、 must be as close as possible to启停液位应尽可能满足启停液位应尽可能满足design the tank size by optimizing the effective volume优化有效容积优化有效容积,设计设计井筒尺寸井筒尺寸At least at the top of the motor 最小到电机的顶部最小到电机的顶部Effective Volume有效容有效容积积2Start level 启泵液位启泵液位Stop level 停泵液位停泵液位2 - Effective Volume有效容积It is very important to get the
9、 distance between start and stop right.启启/停液位之间的距离非常重要停液位之间的距离非常重要The start level and stop level must be as close as possible to启停液位应尽可能满足启停液位应尽可能满足design the tank size by optimizing the effective volume通过优化有效容积设计井筒尺寸通过优化有效容积设计井筒尺寸At least at the top of the motor 最小到电机的顶部最小到电机的顶部Effective Volume有效容积
10、有效容积2Start level 启泵液位启泵液位Stop level 停泵液位停泵液位2 - Effective Volume有效容积The start level and stop level must be as close as possible to启停液位的距离应尽可能小，从而启停液位的距离应尽可能小，从而shorten the stay time of the wastewater缩短废水停留时间缩短废水停留时间Reduce the performance variation Q, H and 减少减少 Q, H and 的变化的变化At least at the top of
11、the motor 最小到电机的顶部最小到电机的顶部Effective Volume有效容积有效容积2Start level 启泵液位启泵液位Stop level 停泵液位停泵液位2 - Effective Volume有效容积2 - Effective Volume有效容积The right distance between start and stop is very important:启停液位之间的距离非常重要启停液位之间的距离非常重要To short a distance may cause overload of the motor due to many start and st
12、op. 距离太近，电机频繁启停导致过载。距离太近，电机频繁启停导致过载。To long a distance may cause sedimentations and risk for clogging due to long stay time in the pit距离太远，水泵运行周期过长，增加距离太远，水泵运行周期过长，增加了沉淀和堵塞的风险了沉淀和堵塞的风险The right distance will give the optimal tank size正确的启停液位距离是池型优化设计正确的启停液位距离是池型优化设计的关键的关键T = Pumping cycle period 水泵运
13、行周期水泵运行周期Ts = Stopping period 停泵周期停泵周期Tp = Pumping period 泵送周期泵送周期T=Tp+Ts2 Calculating the effective volume theory有效容积计算原理6TTTp TsStartStopZmax = maximum number of start-stop /hour 每小时每小时 最大启停次数最大启停次数 = minimum cycle period h = T 最小运行周期最小运行周期Qww/QpPumping period Tp泵泵送周期送周期Stopping period Ts停停泵泵周期周期C
14、ycle period Tp + Ts运行周期运行周期If Qww= pump capacity = 1 then:如果如果Qww= 泵泵送流量送流量 = 1 ，那么Pumping time TP= infinite泵泵送送时间时间TP= 无限大无限大Stopping time TS = 0停停泵时间泵时间TS= 0If Qww= 0 then:如果如果Qww= 0 ，那么pumping time TP = 0泵泵送送时间时间TP= 0Stopping time TS= infinity停停泵时间泵时间TS= 无限大无限大Minimum cycle period =最小运行周期最小运行周期 2
15、 Calculating the effective volume theory有效容积计算原理When Qww /Qp = 0,5 then Tp =Ts :当当Qww /Qp = 0,5 时时，Tp =Ts :the number of start/stop is maximum and the cycle time is minimum启停次数最大，运行周期最短启停次数最大，运行周期最短0 0,5 1T=TpTs2 Calculating the effective volume theory有效容积计算原理When calculating the distance between st
16、art and stop (Heff), we need to know:计算启停液位距离计算启停液位距离(Heff)，需要知道，需要知道Pump capacity Qpm3/h水泵的运行流量Incoming flow Qwwm3/h入流流量Pit diametermm泵坑直径Calculating the minimum start and stop period计算最小启停周期H effMonogram for the determination of the accumulated volume between start and stop (Veff)Calculating the e
17、ffective volume计算有效容积2 Calculating the effective volume theory有效容积计算原理Calculating the height between start and stop level计算启停液位距离For two pumps in alternating operation对于双泵交替运行对于双泵交替运行Note : 说明：说明：Only one pump is taken into account for the calculation, the pumps alternate between duty and standby po
18、sition with each running cycle.当有效容积计算时只考虑一台泵，双泵按运行周期交替当有效容积计算时只考虑一台泵，双泵按运行周期交替运行运行The pumps are calculated for the peak flow水泵流量按照峰值流量计算水泵流量按照峰值流量计算In case of very small incoming flow, the velocity in the raising main must be high enough to prevent sedimentation.当流量非常小时，上升管的流速必须足够大以避免沉淀当流量非常小时，上升管的
19、流速必须足够大以避免沉淀 2 pumps in alternating operation where Qin QPump当当Qin QPump当当Qin QPump，2台泵交替运行台泵交替运行Pump APump B TP TS TPAA BBA TS TPNote : 说明：说明：If the incoming flow exceed the capacity of the duty pump, the pump in standby position will start and 2 pumps are operating in parallel.如果入流流量超过工作水泵流量，备用水泵启
20、动，如果入流流量超过工作水泵流量，备用水泵启动，双泵并联运行双泵并联运行 the pumps can be calculated for the incoming flowpeak flow. If one pump fails, the wastewater level in the pit can raise.可以按照入流流量可以按照入流流量峰值流量计算水泵流量，如果峰值流量计算水泵流量，如果一台泵故障，允许泵站水位升高一台泵故障，允许泵站水位升高2 Calculating the effective volume theory有效容积计算原理For two pumps in altern
21、ating operation对于双泵交替运行对于双泵交替运行Pumping stations with more than two pumps :超过两台泵的泵站The effective volume can be reduced when the pumps are working in parallel and assume alternately the position of duty and standby with each running cycle : 水泵并联运行，按运行周期交替运行，有效容积减小 n = number of pumps excluding the spa
22、re pump 除备用泵以外的水泵数量除备用泵以外的水泵数量2 - Effective Volume有效容积2 - Effective Volume有效容积传统泵站计算方法给水排水设计手册（第五册）城镇排水2 - Effective Volume有效容积传统泵站计算方法给水排水设计手册（第五册）城镇排水Exercice 练习Qp = 52,8 l/s2 pumps in alternating operation 双双泵泵交替运行交替运行Circular tank : diameter 2300 mm圆圆形池：直径形池：直径2300mmInformation given:已知信息The eff
23、ective volume Veff有效容有效容积积 VeffCalculate:计算Correction正确的计算Circular tank : diameter 2300 mm, R=1,15 m圆形池：直径圆形池：直径2300mm,R=1.15MQin = 52,8 l/s is equal to 190 m3/hQin = 52,8 l/s 等于等于 190 m3/hrVeffectiveHeffective33 +4 distance 距离距离Distance 3 is about 10 cm距离距离3大约大约10cmDistance 4 is about 10 cm, but it
24、 can be choosen by the customer 距离距离4大约大约10cm,但可由客户选择但可由客户选择110 mmMinimum volume最小容积最小容积Effective volume有效容积有效容积124Alarm level报警液位报警液位Inlet port 进口端进口端Start level启泵液位启泵液位Bottom底部底部Stop level停泵液位停泵液位Pumping station sizing泵站尺寸泵站尺寸Distance 5 frost-free depth or local regulations距离距离5为为冰冰冻线冻线以下或按照地方法以下或
25、按照地方法规规Distance 6 Minimum 5 cm to prevent water from entering the pit距离距离6最小最小为为5cm，防止水从，防止水从顶顶盖盖进进入入泵泵站站Distance 5 and 6 must be given by the customer距离距离5和和6应应由客由客户户提供提供Ground level地面地面标标高高56Top cover顶顶盖盖Discharge port出口端出口端Pumping station sizing - 2 pumps泵站尺寸双泵泵站尺寸双泵Pumping cycle two pumps 两台泵泵送周
26、期两台泵泵送周期Pumping cycle one pump 一台泵泵送周期一台泵泵送周期P1P1P2Bottom底部底部Stop level停泵液位停泵液位Inlet port 进口端进口端Start level pump 1 水泵水泵启动液启动液位位1Minimum level最小液位最小液位Effective level有效液位有效液位12Start level pump 2Distance between start levels about 10 cm 启动液位之间的距离约启动液位之间的距离约10cmStart level pump 2 水泵启动液位水泵启动液位2Alarm leve
27、l报警液位报警液位The right pumping station for the customers need符合客户需求的泵站符合客户需求的泵站FAQ(Frequently asked questions)（常问问题）How can I protect the pit from uplift ?如何抗浮In area with high groundwater-level, or in area with high possibility for heavy rain there is a risk for uplift.在地下水位较高的区域，或在可能会降暴雨的区在地下水位较高的区域，或
28、在可能会降暴雨的区域，存在泵站上浮的风险。域，存在泵站上浮的风险。Uplift is an situation where the pit can be lifted up from the ground by the water-pressure.上浮位置为泵站在水的浮力作用下可能会浮起的上浮位置为泵站在水的浮力作用下可能会浮起的位置。位置。Situation情形情形What is uplift?什么是上浮Archimedes principle:principle that states that a body immersed in a fluid is buoyed up by a f
29、orce equal to the weight of the displaced fluid.阿基米德定律：浸入液体的物体所受的浮力等于排出液体的重力The force from the uplift (FUplift) is equal to the weight of the displaced water浮力浮力(FUplift)等于排出液体的等于排出液体的重力重力FUpliftDisplaced water排出液体排出液体Formula for calculating the weight of displaced water计算排出液体重量的公式计算排出液体重量的公式The upl
30、ift must be prevented by making an slightly bigger down force通过比浮力大向下的力抗浮通过比浮力大向下的力抗浮Fdown FUpliftPutting material around the slab area, will create the Fdown在底部区域放置重物能产生向下的力在底部区域放置重物能产生向下的力Density of concrete/gravel : water =water = 2 - 2,5混凝土的比重混凝土的比重Density of water : water water = = 1水的比重水的比重Sla
31、b area(sa)The trick is to make the pit heavier than the weight of the displaced water解决方法解决方法为让泵为让泵站比排出液体的站比排出液体的重量重重量重What is uplift?什么是浮力HrFUpliftFDownMy pit must be installed in the street?泵站需要安装在街道上The consultants want to install the pit in a area with heavy traffic.客户需要将泵站安装在交通繁忙的区域客户需要将泵站安装在交通
32、繁忙的区域Which solution can we offer him?我们能提供什么解决方案？我们能提供什么解决方案？Situation情形情形The norm EN 124 precises the design/load of the manholes top for traffic and sidewalk area EN124标准规定交通和人行道区域顶盖设计和荷载Class A15 ( 15 kN) for sidewalk and bicycle areaA15级( 15 kN)可以承受人行道和自行车区域Class B125 ( 125 kN) for pavements, si
33、dewalk zones B125 ( 125 kN)可以承受公路和人行道区域Class C 250 for gully C 250可用于集水沟Class D 400 for roads, streets and parkingsD 400可用于道路、街道和停车场Class E 600 and F 900 A pit like PUST can withstand 1000 kg (1 kg = 10 N) PUST可以承受1000kg荷载(1 kg = 10 N) Max load on top of the pit泵站顶盖最大承载Concrete basement混凝土底板混凝土底板Cast iron manhole cover 铸铁盖板Concrete cone混凝土锥混凝土锥O-ringsO形圈形圈Asphalt 沥青沥青Asphalt沥青沥青How to install the pit in the street如何将泵站安装在街道上
