刀閘閥使用時應注意的事項
的(de)啟(qi)閉(bi)件是(shi)閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban),閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban)的(de)運動方向與流體方向是(shi)相垂直的(de),陶瓷刀閘(zha)(zha)閥只能作全(quan)開或者全(quan)關,不(bu)能當作調節(jie)和節(jie)流。閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban)有(you)兩個(ge)密封(feng)(feng)面,zui常(chang)用的(de)模(mo)式(shi)閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban)閥的(de)兩個(ge)密封(feng)(feng)面形(xing)成(cheng)楔(xie)形(xing)、楔(xie)形(xing)角隨閥門參(can)數(shu)而異(yi),通(tong)常(chang)為50,楔(xie)式(shi)陶瓷刀閘(zha)(zha)閥的(de)閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban)可以(yi)做(zuo)成(cheng)一個(ge)整體,叫做(zuo)剛(gang)性閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban);也可以(yi)做(zuo)成(cheng)能產(chan)生微(wei)量(liang)變形(xing)的(de)閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban),以(yi)改善其(qi)工藝性,彌(mi)補密封(feng)(feng)面角度在加工過程中產(chan)生的(de)偏差(cha),這種閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban)叫做(zuo)彈性閘(zha)(zha)板(ban)(ban)(ban)(ban)(ban)。
陶瓷刀閘(zha)閥(fa)(fa)關閉(bi)時(shi),密(mi)封(feng)面可以(yi)只依靠(kao)介(jie)質壓(ya)力(li)來密(mi)封(feng),即依靠(kao)介(jie)質壓(ya)力(li)將閘(zha)板的(de)(de)密(mi)封(feng)面壓(ya)向(xiang)另一(yi)側的(de)(de)閥(fa)(fa)座來保(bao)證密(mi)封(feng)面的(de)(de)密(mi)封(feng),這就是自密(mi)封(feng)。大部分是采用強(qiang)制密(mi)封(feng)的(de)(de),即閥(fa)(fa)門(men)關閉(bi)時(shi),要依靠(kao)外力(li)強(qiang)行將閘(zha)板壓(ya)向(xiang)閥(fa)(fa)座,以(yi)保(bao)證密(mi)封(feng)面的(de)(de)密(mi)封(feng)性。