根據水封(feng)(feng)的(de)(de)(de)(de)作用,高水頭閘(zha)門(men)的(de)(de)(de)(de)水封(feng)(feng)裝置應(ying)該滿足以下要求:①水封(feng)(feng)的(de)(de)(de)(de)水密性能(neng)(neng)好(hao); ②閘(zha)門(men)在開啟(qi)、關閉過程(cheng)中能(neng)(neng)有(you)效地防止(zhi)或消除閘(zha)門(men)振(zhen)動;③閘(zha)門(men)啟(qi)閉過程(cheng),水封(feng)(feng)的(de)(de)(de)(de)止(zhi)水元件(jian)應(ying)有(you)良(liang)好(hao)的(de)(de)(de)(de)耐(nai)磨性能(neng)(neng);④閘(zha)門(men)啟(qi)閉時,水封(feng)(feng)的(de)(de)(de)(de)摩阻力(li)盡(jin)可能(neng)(neng)小,且(qie)水封(feng)(feng)不(bu)得產生不(bu)利于閘(zha)門(men)運行的(de)(de)(de)(de)阻力(li);⑤水封(feng)(feng)結構(gou)要盡(jin)量簡單,操作維修方(fang)便;⑥水封(feng)(feng)材質(zhi)既要有(you)一定的(de)(de)(de)(de)必要的(de)(de)(de)(de)彈(dan)性,又要有(you)足夠的(de)(de)(de)(de)剛(gang)度(du)、強度(du)和耐(nai)久性。
要(yao)(yao)滿足(zu)上述(shu)水(shui)(shui)(shui)(shui)(shui)(shui)封(feng)裝置(zhi)的要(yao)(yao)求,除了在止(zhi)(zhi)(zhi)水(shui)(shui)(shui)(shui)(shui)(shui)元(yuan)件(jian)的材質(zhi)方面(mian)講究(jiu)之外,還與水(shui)(shui)(shui)(shui)(shui)(shui)封(feng)的結構(gou)(gou)(gou)斷面(mian)型式(shi)(shi)有關,要(yao)(yao)從水(shui)(shui)(shui)(shui)(shui)(shui)封(feng)結構(gou)(gou)(gou)型式(shi)(shi)上加以(yi)研(yan)(yan)究(jiu)。目前(qian)有兩種(zhong)水(shui)(shui)(shui)(shui)(shui)(shui)封(feng)結構(gou)(gou)(gou)型式(shi)(shi)可以(yi) 考慮:一是采用(yong)變形止(zhi)(zhi)(zhi)水(shui)(shui)(shui)(shui)(shui)(shui),由閘門移(yi)動,使止(zhi)(zhi)(zhi)水(shui)(shui)(shui)(shui)(shui)(shui)元(yuan)件(jian)受壓(ya)(ya),如壓(ya)(ya)緊式(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)封(feng);一是采用(yong)自控式(shi)(shi)止(zhi)(zhi)(zhi)水(shui)(shui)(shui)(shui)(shui)(shui),強制止(zhi)(zhi)(zhi)水(shui)(shui)(shui)(shui)(shui)(shui)元(yuan)件(jian)本身作一**移(yi),如充壓(ya)(ya)伸縮式(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)封(feng)。此外,閘門底止(zhi)(zhi)(zhi)水(shui)(shui)(shui)(shui)(shui)(shui)由于受到高速水(shui)(shui)(shui)(shui)(shui)(shui)流的沖(chong)擊,使用(yong)壽(shou)命會短,因此對底止(zhi)(zhi)(zhi)水(shui)(shui)(shui)(shui)(shui)(shui)的結構(gou)(gou)(gou)型式(shi)(shi)的研(yan)(yan)究(jiu)顯(xian)得(de)更為重要(yao)(yao)。
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