Iuvemvane valveyasungulwa e-United States ngawo-1930. Yethulwa eJapan ngeminyaka yawo-1950 futhi ayizange isetshenziswe kabanzi eJapan kwaze kwaba ngawo-1960. Akuzange kudume ezweni lami kwaze kwaba ngawo-1970. Izici eziyinhloko zama-butterfly valves yilezi: i-torque encane yokusebenza, indawo encane yokufaka nesisindo esincane. Ukuthatha i-DN1000 njengesibonelo, iuvemvane valvecishe i-2T, kuyilapho i-i-valve yesangocishe 3.5T. Iuvemvane valvekulula ukuyihlanganisa namadivayisi ahlukahlukene okushayela futhi inokuqina okuhle nokuthembeka. Ukungalungi kwama-butterfly valves e-rubber-sealed yukuthi uma isetshenziselwa ukudonsa, i-cavitation izokwenzeka ngenxa yokusetshenziswa okungalungile, okubangela ukuthi isihlalo senjoloba siphume futhi sonakaliswe. Ngakho-ke, indlela yokukhetha kahle incike ezimweni zokusebenza. Ubudlelwano phakathi kokuvulwa kwevalve uvemvane kanye nezinga lokugeleza ngokuyisisekelo kumugqa. Uma isetshenziselwa ukulawula izinga lokugeleza, izici zayo zokugeleza nazo zihlobene eduze nokumelana nokugeleza kwamapayipi. Isibonelo, uma izinga levalvu kanye nesimo samapayipi amabili kuyafana, kodwa i-coefficient yokulahlekelwa kwepayipi ihlukile, izinga lokugeleza kwevalvu nalo lizohluka kakhulu. Uma i-valve isesimweni sokuphakama okukhulu kwe-throttling, i-cavitation ijwayele ukwenzeka ngemuva kwe-valve plate, engase ilimaze i-valve. Ngokuvamile isetshenziswa ngaphandle kuka-15 °. Lapho i-uvemvane valveiphakathi nendawo yokuvula, ukwakheka kokuvula okwakhiwa umzimba we-valve kanye nomkhawulo ongaphambili wepuleti uvemvane ugxile ku-valve shaft, futhi kwakheka izimo ezihlukene nhlangothi zombili. Ingxenye engaphambili yepuleti uvemvane ngakolunye uhlangothi inyakaza ibheke lapho amanzi egeleza khona, kanti olunye uhlangothi luhamba lubheke lapho kugeleza khona amanzi. Ngakho-ke, umzimba we-valve kanye ne-valve plate ngakolunye uhlangothi kwenza ukuvuleka okumise okwe-nozzle, kanti olunye uhlangothi lufana nokuvuleka okumise okwembobo ye-throttle. Uhlangothi lwe-nozzle lunezinga lokugeleza elishesha kakhulu kunohlangothi lwe-throttle, futhi ukucindezela okungalungile kuzokwenziwa ngaphansi kwe-valve ohlangothini lwe-throttle, futhi uphawu lwerabha luvame ukuwa. I-torque yokusebenza ye-uvemvane valveiyahlukahluka ngenxa yokuvuleka okuhlukene kanye nezikhombisi-ndlela zokuvula nokuvala ze-valve. I-torque ekhiqizwa umehluko phakathi kwamakhanda amanzi angaphezulu naphansi we-valve butterfly evundlile, ikakhulukazi i-valve yobubanzi obukhulu, ngenxa yokujula kwamanzi, ayikwazi ukushaywa indiva. Ngaphezu kwalokho, lapho indololwane ifakwe ohlangothini lokungena lwe-valve, kwakheka ukugeleza kwe-bias, futhi i-torque izokhula. Uma i-valve iphakathi nendawo, indlela yokusebenza idinga ukuzikhiya ngenxa yesenzo se-torque yokugeleza kwamanzi.
I-China inamaketanga amaningi embonini yama-valve, kodwa akuwona amandla e-valve. Ngokuvamile, izwe lami selingene ezinhlwini zamandla amavalvu omhlaba, kodwa mayelana nekhwalithi yomkhiqizo, izwe lami lisekude ekubeni amandla e-valve. Imboni isenokugxilisa ukukhiqizwa okuphansi, amandla aphansi e-R&D amavalvu afana nemikhiqizo ephezulu, kanye nezinga eliphansi lobuchwepheshe bokukhiqiza embonini yamavalvu, kanye nokushoda kohwebo lokungeniswa nokuthekelisa kuyaqhubeka ukwanda. Azikho neze izinkampani eziningi ze-valve ezingaphila ngempela emakethe. Kodwa-ke, lokhu kushaqeka kwesivinini esikhulu embonini ye-valve kuzoletha amathuba amakhulu, futhi umphumela wokushaqeka uzokwenza ukusebenza kwemakethe kube okunengqondo. Umgwaqo oya endaweni yama-valve aphezulu "unzima" ngokwedlulele. Izingxenye eziyisisekelo seziphenduke ukushoda okuvimbela ukuthuthukiswa kwemboni yezokukhiqiza yezwe lami ezingeni eliphezulu. Phakathi NoHlelo Lweminyaka Eyi-12 Lweminyaka Emihlanu, uhulumeni uzoqhubeka nokwandisa ukwenziwa kwasendaweni kwezingxenye zemishini esezingeni eliphezulu. Lapha sikhetha intuthuko eminingana ebalulekile “Kuhlelo Lokuqalisa” kanye nezimboni ezimele amavalvu ukuze kuhlaziywe ukuthi kungenzeka yini ukushintshwa kwempahla evela kwamanye amazwe. Kusukela ekuhlaziyeni, kungase kubonakale ukuthi ukuba nokwenzeka kokushintshaniswa kwamavalvu kwamanye amazwe ezimbonini ezincane ezihlukahlukene kuyehluka kakhulu, futhi amavavu asezingeni eliphezulu adinga ngokushesha ukuqondiswa okwengeziwe kwenqubomgomo nokusekelwa kocwaningo lwesayensi.
Imboni yamavalvu idlala indima ebaluleke kakhulu njengesixhumanisi esibalulekile embonini yokukhiqiza imishini ekuthuthukisweni komnotho wezwe. Njengoba izinga lomkhakha wokukhiqiza ama-valve wasekhaya wezwe lami lisekude nebanga elithile ezingeni elithuthukile lamazwe ngamazwe, ukhiye omningiama-valvengamapharamitha aphezulu, izinga lokushisa eliphezulu nokucindezela okukhulu, kanye nezinga eliphezulu lephawundi lihlale lithembele ekuthengisweni kwamanye amazwe. Isibonelo, uhlobo lwaseYurophu lwe-OMAL luhlezi luyisinqumo esiyinhloko embonini yokufaka ama-valve yasekhaya. Ukuze kuthuthukiswe ukwenziwa kwama-valve endaweni, ngemva kokuba uMkhandlu Wombuso ukhiphe “Imibono Eminingi Ngokusheshisa Ukuvuselelwa Kwemboni Yokukhiqiza Izisetshenziswa”, iminyango kahulumeni efanele yenze uchungechunge lokusatshalaliswa okukhulu ngokuhambisana nezidingo zombuso zokwenziwa kwendawo imishini emikhulu. Iholwa yiKhomishini Yentuthuko Kazwelonke Nezinguquko, i-China Machinery Industry Federation kanye ne-China General Machinery Industry Association baye batshala futhi benzai-valveuhlelo lokwakhiwa kwasendaweni kwemishini emikhulu emikhakheni ehlobene, futhi sebexhumanise neminyango efanele izikhathi eziningi. Manje ukwenziwa kwasendaweni kwama-valve kuye kwakha ukuvumelana embonini yama-valve yasekhaya. Yamukela ngenkuthalo izindinganiso zamazwe ngamazwe zokuklama umkhiqizo; thatha izakhiwo ezinhle kakhulu zakwamanye amazwe (okuhlanganisa nobuchwepheshe obunelungelo lobunikazi); ukuhlolwa komkhiqizo kanye nokuhlolwa kokusebenza kwenziwa ngokuqinile ngokuhambisana namazinga omhlaba; thatha isipiliyoni senqubo yokukhiqiza yangaphandle futhi unamathisele ukubaluleka ocwaningweni nasekukhuthazeni izinto ezintsha; ukucacisa imingcele yezobuchwepheshe kanye nezimo zokusebenza zemikhiqizo yama-valve epharamitha ephezulu engenisiwe, njll. izindlela zokusheshisa inqubo yokwenziwa kwendawo, ukukhuthaza ukubuyekezwa okuqhubekayo kwemikhiqizo yama-valve, nokuqaphela ngokugcwele ukwenziwa kwendawo kwama-valve. Ngokusheshisa kwejubane lokuhlela kabusha embonini yama-valve, imboni yesikhathi esizayo izoba umncintiswano phakathi kwekhwalithi yomkhiqizo we-valve nokuphepha kanye nemikhiqizo yemikhiqizo. Imikhiqizo izothuthuka ibheke kobuchwepheshe obuphezulu, imingcele ephezulu, ukumelana nokugqwala okuqinile, nempilo ende. Kuphela ngokuqamba okusha okuqhubekayo, ukuthuthukiswa kwemikhiqizo emisha, kanye noguquko lobuchwepheshe izinga lobuchwepheshe bomkhiqizo lingathuthukiswa kancane kancane ukuze lihlangabezane nokumataniswa kwedivayisi yasekhaya futhi kubonakale ngokugcwele ukwenziwa kwasendaweni kwamavalvu. Ngaphansi kwesimo sesidingo esikhulu, imboni yokukhiqiza amavalvu yezwe lami izokhombisa amathemba angcono entuthuko.
Isikhathi sokuthumela: Nov-02-2024
