Ukwandiswa kolwazi I

I-valve yokulawula i-diaphragm ye-pneumatic esemfanekisweni ingeyohlobo oluvaliwe lomoya. Abanye abantu babuza, kungani? Okokuqala, bheka isiqondiso se-air inlet yefilimu ye-pneumatic, okuwumphumela omuhle. Okwesibili, bheka isiqondiso sokufakwa kwe-spool, umphumela omuhle. Igumbi le-diaphragm lomoya lixhunywe nomthombo womoya, futhi i-diaphragm icindezela phansi isiphethu esiyisithupha esimbozwe i-diaphragm, ukuze isunduze induku yevalvu iye phansi. I-valve rod ixhunywe ne-valve core, futhi i-valve core ifakwe ohlangothini oluhle, ngakho umthombo womoya yi-valve yokuthuthela endaweni evaliwe. Ngakho-ke, kubizwa ngokuthi i-valve yokuvala igesi. Lapho ukunikezwa kwegesi kuphazamiseka ngenxa yokwakhiwa noma ukugqwala kwepayipi legesi, i-valve izosetha kabusha ngaphansi kwamandla okusabela entwasahlobo, futhi i-valve izoba sesimweni esivulekile ngokugcwele. Indlela yokusebenzisa i-valve yokuvala igesi? Indlela yokuyisebenzisa ibhekwa kusukela ekubukeni kokuphepha, okuyisimo esidingekayo sokukhetha noma ukuvala igesi. Isibonelo: enye yezinsiza eziyinhloko ze-boiler isigubhu se-steam. Ivalvu elawulayo esetshenziswa ohlelweni lokuphakelwa kwamanzi kumele ivalwe umoya. Kungani? Isibonelo, uma umthombo wegesi noma ukunikezwa kwamandla kuphazamiseka ngokuzumayo, isithando somlilo sisavutha ngamandla, sishisa ngokuqhubekayo amanzi esigubhu se-steam. Uma igesi isetshenziselwa ukuvula i-valve yokulawula futhi amandla aphazamiseka, i-valve izovalwa futhi isigubhu se-steam sizokoma (ukuvutha okomile) njalo ngomzuzu ngaphandle kokungena kwamanzi. Lokhu kuyingozi kakhulu. Akunakwenzeka ukubhekana nephutha le-valve yokulawula ngesikhathi esifushane, okuzoholela engozini yokuvala i-boiler. Ngakho-ke, ukuze ugweme ukushisa okomile noma ngisho nengozi yokuvala, i-valve kufanele ivalwe ngegesi. Nakuba amandla enqanyuliwe futhi i-valve yokulawula isendaweni evulekile ngokugcwele, amanzi anikezwa ngokuqhubekayo esigubhu, kodwa ngeke kubangele ukuba isigubhu some. Kusekhona isikhathi sokubhekana nokuhluleka kwe-valve yokulawula, ngakho-ke akudingekile ukuvala i-boiler ngokuqondile. Ngalezi zibonelo ezingenhla, sekuyisikhathi sokuba nokuqonda kokuqala kokuthi ungawukhetha kanjani umoya ku-valve yokulawula kanye ne-air off control valve!