氣(qi)(qi)(qi)動(dong)(dong)(dong)截止(zhi)閥(fa)門(men)(men)工作(zuo)原理:使用壓縮(suo)空氣(qi)(qi)(qi)作(zuo)為(wei)動(dong)(dong)(dong)力源的(de)(de)閥(fa)門(men)(men)大部(bu)分采用遠程(cheng)控(kong)(kong)制,由主控(kong)(kong)室手動(dong)(dong)(dong)或自動(dong)(dong)(dong)觸發動(dong)(dong)(dong)作(zuo)指(zhi)令,使進、排(pai)氣(qi)(qi)(qi)電磁閥(fa)動(dong)(dong)(dong)作(zuo),向(xiang)執行機構內供、排(pai)壓縮(suo)空氣(qi)(qi)(qi)。壓縮(suo)空氣(qi)(qi)(qi)作(zuo)用在活塞或隔膜上,克服閥(fa)門(men)(men)動(dong)(dong)(dong)作(zuo)的(de)(de)摩擦力和(he)閥(fa)桿上的(de)(de)彈簧彈力,從而(er)壓下(對(dui)于(yu)失氣(qi)(qi)(qi)開閥(fa)門(men)(men))或提起(對(dui)于(yu)失氣(qi)(qi)(qi)關閥(fa)門(men)(men))閥(fa)桿,帶動(dong)(dong)(dong)閥(fa)芯上下動(dong)(dong)(dong)作(zuo),使閥(fa)門(men)(men)打開或關閉。
在(zai)閥(fa)門失(shi)氣(qi)(qi)(qi)(qi),驅動頭內(nei)無壓縮(suo)空(kong)氣(qi)(qi)(qi)(qi)時(shi),閥(fa)門會按照系統(tong)的(de)要求處于全開或全關的(de)位(wei)置。電(dian)廠(chang)用儀用壓縮(suo)空(kong)氣(qi)(qi)(qi)(qi),供氣(qi)(qi)(qi)(qi)壓力一般為4~9bar,在(zai)進入到(dao)閥(fa)門之前(qian),首(shou)先(xian)通過(guo)(guo)過(guo)(guo)濾器將(jiang)壓縮(suo)空(kong)氣(qi)(qi)(qi)(qi)過(guo)(guo)濾、凈(jing)化(hua),然(ran)后通過(guo)(guo)減壓閥(fa)減壓,入口壓力表的(de)讀數不超過(guo)(guo)4bar。壓力調(diao)(diao)整是(shi)能通過(guo)(guo)調(diao)(diao)節安裝在(zai)減壓閥(fa)頂部的(de)調(diao)(diao)節螺(luo)釘來(lai)實(shi)現的(de),調(diao)(diao)節前(qian)要先(xian)擰松(song)保(bao)護蓋。
常見和應用廣泛的氣(qi)(qi)(qi)動截(jie)止(zhi)閥(fa)門(men)四種類型(xing)是(shi):手輪(lun)的失(shi)(shi)(shi)氣(qi)(qi)(qi)關(guan)閉(bi)閥(fa)門(men)、手輪(lun)的失(shi)(shi)(shi)氣(qi)(qi)(qi)開(kai)啟(qi)閥(fa)門(men)、無(wu)手輪(lun)的失(shi)(shi)(shi)氣(qi)(qi)(qi)關(guan)閉(bi)閥(fa)門(men)、無(wu)手輪(lun)的失(shi)(shi)(shi)氣(qi)(qi)(qi)開(kai)啟(qi)閥(fa)門(men)。