PTFE純模(mo)壓(ya)(ya)筒(tong)內(nei)設有(you)模(mo)壓(ya)(ya)腔，所(suo)述(shu)(shu)模(mo)壓(ya)(ya)腔的(de)(de)至少一(yi)(yi)端開口；所(suo)述(shu)(shu)的(de)(de)模(mo)壓(ya)(ya)筒(tong)上設有(you)若干過(guo)濾(lv)(lv)(lv)通(tong)(tong)道(dao)，所(suo)述(shu)(shu)的(de)(de)過(guo)濾(lv)(lv)(lv)通(tong)(tong)道(dao)包括(kuo)擴張段，所(suo)述(shu)(shu)的(de)(de)擴張段從(cong)一(yi)(yi)端向另一(yi)(yi)端逐漸擴張；所(suo)述(shu)(shu)擴張段的(de)(de)小端朝(chao)向模(mo)壓(ya)(ya)腔設置(zhi)，并與模(mo)壓(ya)(ya)腔連(lian)通(tong)(tong)；所(suo)述(shu)(shu)的(de)(de)模(mo)壓(ya)(ya)筒(tong)內(nei)設有(you)與過(guo)濾(lv)(lv)(lv)通(tong)(tong)道(dao)連(lian)通(tong)(tong)的(de)(de)排(pai)液通(tong)(tong)道(dao)。模(mo)壓(ya)(ya)筒(tong)中過(guo)濾(lv)(lv)(lv)通(tong)(tong)道(dao)的(de)(de)一(yi)(yi)端向另一(yi)(yi)端擴張，確保固體(ti)雜質在高(gao)壓(ya)(ya)作用(yong)下進入過(guo)濾(lv)(lv)(lv)通(tong)(tong)道(dao)后，可(ke)以順利排(pai)出，不會造成(cheng)過(guo)濾(lv)(lv)(lv)通(tong)(tong)道(dao)的(de)(de)堵塞(sai)，提高(gao)過(guo)濾(lv)(lv)(lv)效率。