Isiteshi sokuxuba itiyela siyisethi ebalulekile ephelele yemishini ezimpilweni zabantu. Amathuluzi anezakhi eziningi, njengomshini wokugreda, isikrini esidlidlizayo, i-feeder yebhande, isidlulisi sempushana, ikheshi nezinye izingxenye. I-valve yokuxhuma nayo ingenye yazo. Ngakho-ke yini indima ethile ye-plug valve esitshalweni sokuxuba i-asphalt? Lesi sihloko sizonikeza isingeniso esifushane ngokulandelayo.

I-valve yepulaki okokuqala kukho konke ivalvu ejikelezayo evalayo noma emise okwe-plunger. Ngokuvamile, idinga ukuzungezisa amadigri angamashumi ayisishiyagalolunye ukwenza imbobo yesiteshi kupulaki yevalvu ifane nomzimba wevalvu, noma ingahlukaniswa ukuze ivuleke noma ivale. umphumela. Ukuma kwe-valve yepulaki esitshalweni sokuxuba i-asphalt ngokuvamile kuyisilinda noma ikhoni.

Uma umsebenzisi ebona isiteshi esingunxande esitshalweni sokuxuba itiyela, ngokuvamile kuba sepulaki yevalvu eyicylindrical. Uma kuyisiteshi se-trapezoidal, iyipulaki ye-valve ene-tapered. Ku-valve yepulaki, izakhiwo ezihlukene zokwenza isakhiwo sibe lula. Umsebenzi oyinhloko ukuvimba noma ukuxhuma okuphakathi. Okunye ukusetshenziswa ukuphambukisa ukugeleza.

Ama-valve wokuxhuma ayashesha futhi kulula ukusebenza ezitshalweni zokuxuba i-asphalt, ngakho-ke ukusebenza okuvamile ngeke kubangele izinkinga. Ama-valve e-plug anezinye izici, ezifana nokumelana noketshezi oluncane, isakhiwo esilula, ukugcinwa okulula, ukusebenza kahle kokuvala futhi akukho-oscillation. Umsindo ophansi nezinye izinzuzo. Ukusetshenziswa kwama-valve epulaki ezitshalweni zokuxuba i-asphalt akunazo izithiyo zokuqondisa nhlobo, ngakho-ke kuhlakaniphe kakhulu ukusebenzisa kumishini.