PTFE純(chun)模(mo)壓筒(tong)(tong)(tong)內(nei)設(she)有(you)模(mo)壓腔，所(suo)述模(mo)壓腔的至少一端(duan)(duan)(duan)(duan)開(kai)口；所(suo)述的模(mo)壓筒(tong)(tong)(tong)上設(she)有(you)若干過(guo)(guo)濾(lv)通(tong)(tong)(tong)道，所(suo)述的過(guo)(guo)濾(lv)通(tong)(tong)(tong)道包括擴張段(duan)(duan)，所(suo)述的擴張段(duan)(duan)從(cong)一端(duan)(duan)(duan)(duan)向(xiang)另(ling)一端(duan)(duan)(duan)(duan)逐漸(jian)擴張；所(suo)述擴張段(duan)(duan)的小端(duan)(duan)(duan)(duan)朝向(xiang)模(mo)壓腔設(she)置，并與(yu)模(mo)壓腔連通(tong)(tong)(tong)；所(suo)述的模(mo)壓筒(tong)(tong)(tong)內(nei)設(she)有(you)與(yu)過(guo)(guo)濾(lv)通(tong)(tong)(tong)道連通(tong)(tong)(tong)的排液通(tong)(tong)(tong)道。模(mo)壓筒(tong)(tong)(tong)中過(guo)(guo)濾(lv)通(tong)(tong)(tong)道的一端(duan)(duan)(duan)(duan)向(xiang)另(ling)一端(duan)(duan)(duan)(duan)擴張，確保固體雜質在高壓作用下進入過(guo)(guo)濾(lv)通(tong)(tong)(tong)道后，可(ke)以(yi)順利排出，不會造(zao)成過(guo)(guo)濾(lv)通(tong)(tong)(tong)道的堵塞，提高過(guo)(guo)濾(lv)效率。