PTFE純模(mo)壓(ya)(ya)(ya)筒(tong)內設(she)有(you)模(mo)壓(ya)(ya)(ya)腔，所述(shu)模(mo)壓(ya)(ya)(ya)腔的(de)(de)至少一端開口；所述(shu)的(de)(de)模(mo)壓(ya)(ya)(ya)筒(tong)上設(she)有(you)若(ruo)干(gan)過(guo)(guo)濾(lv)通(tong)(tong)(tong)道(dao)，所述(shu)的(de)(de)過(guo)(guo)濾(lv)通(tong)(tong)(tong)道(dao)包(bao)括(kuo)擴(kuo)張段(duan)，所述(shu)的(de)(de)擴(kuo)張段(duan)從一端向另一端逐漸擴(kuo)張；所述(shu)擴(kuo)張段(duan)的(de)(de)小(xiao)端朝向模(mo)壓(ya)(ya)(ya)腔設(she)置，并與模(mo)壓(ya)(ya)(ya)腔連通(tong)(tong)(tong)；所述(shu)的(de)(de)模(mo)壓(ya)(ya)(ya)筒(tong)內設(she)有(you)與過(guo)(guo)濾(lv)通(tong)(tong)(tong)道(dao)連通(tong)(tong)(tong)的(de)(de)排(pai)液通(tong)(tong)(tong)道(dao)。模(mo)壓(ya)(ya)(ya)筒(tong)中過(guo)(guo)濾(lv)通(tong)(tong)(tong)道(dao)的(de)(de)一端向另一端擴(kuo)張，確(que)保固體雜質在高壓(ya)(ya)(ya)作用下進入過(guo)(guo)濾(lv)通(tong)(tong)(tong)道(dao)后，可以順利排(pai)出，不會(hui)造成過(guo)(guo)濾(lv)通(tong)(tong)(tong)道(dao)的(de)(de)堵塞，提高過(guo)(guo)濾(lv)效(xiao)率。