泵站設計關(guān)鍵ppt課件(參考版)
2025-01-18 00:01本頁面
【正文】 principle: principle that states that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid. 阿基米德定律： 浸入液體的物體所受的浮力等于排出液體的重力 ?The force from the uplift (FUplift) is equal to the weight of the displaced water ?浮力 (FUplift)等于排出液體的重力 FUplift Displaced water 排出液體 G r u n d f o s F L O W T H I N K I N G28 Formula for calculating the weight of displaced water 計算排出液體重量的公式 The uplift must be prevented by making an slightly bigger down force 通過比浮力大向下的力抗浮 Fdown FUplift Putting material around the slab area, will create the Fdown 在底部區(qū)域放置重物能產(chǎn)生向下的力 Density of concrete/gravel : ρwater = 2 2,5 混凝土的比重 Density of water : ρwater = 1 水的比重 Slab area (sa) The trick is to make the pit heavier than the weight of the displaced water 解決方法為讓泵站比排出液體的重量重 What is uplift? 什么是浮力 2u p l if tF = wa te rrH??? ? ?H r FUplift FDown 2do w nF = ( sl a b a r e a ) m ate r ialrH??? ? ?G r u n d f o s F L O W T H I N K I N G29 My pit must be installed in the street?? 泵站需要安裝在街道上 ? The consultants want to install the pit in a area with heavy traffic. ? 客戶需要將泵站安裝在交通繁忙的區(qū)域 ? Which solution can we offer him? ? 我們能提供什么解決方案？ Situation情形 G r u n d f o s F L O W T H I N K I N G30 The norm EN 124 precises the design/load of the manholes top for traffic and sidewalk area EN124標準規(guī)定交通和人行道區(qū)域頂蓋設計和荷載 Class A15 ( 15 kN) for sidewalk and bicycle area A15級 ( 15 kN)可以承受人行道和自行車區(qū)域 Class B125 ( 125 kN) for pavements, sidewalk zones B125 ( 125 kN)可以承受公路和人行道區(qū)域 Class C 250 for gully C 250可用于集水溝 Class D 400 for roads, streets and parkings D 400可用于道路、街道和停車場 Class E 600 and F 900 A pit like PUST can withstand 1000 kg (1 kg = 10 N) PUST可以承受1000kg荷載 (1 kg = 10 N) Max load on top of the pit 泵站頂蓋最大承載 G r u n d f o s F L O W T H I N K I N G31 Concrete basement 混凝土底板 Cast iron manhole cover 鑄鐵蓋板 Concrete cone 混凝土錐 Orings O形圈 Asphalt 瀝青 Asphalt瀝青 How to install the pit in the street 如何將泵站安裝在街道上 。 ?Uplift is an situation where the pit can be lifted up from the ground by the waterpressure. ?上浮位置為泵站在水的浮力作用下可能會浮起的位置。)(PUST) ?1 Minimum volume 最小容積 ?Baffle緩沖高度 Minimum volume 最小容積 ?1 Bottom 底部 Stop level 停泵液位 G r u n d f o s F L O W T H I N K I N G6 ? Minimum diameter at the bottom （ PUST）increases the water velocity and facilitate the pumping of solid matters ? 底部直徑縮小 (PUST)增加了水的流速，有利于泵送固體介質(zhì) ? Minimum stop level for SE1/SEV with stainless steel jackets is just above th
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