1. Umgomo wokusebenza we-valve ye-plug ye-DBB
I-valve ye-plug ye-DBB iyi-valve ephindwe kabili futhi ephuma igazi: i-valve enengxenye eyodwa enezindawo ezimbili zokuvala izihlalo, uma ivaliwe, ingavimba ingcindezi ephakathi nendawo evela emaphethelweni aphezulu naphansi e-valve ngesikhathi esifanayo, futhi iboshwe phakathi kwezindawo zokuvala izihlalo. I-valve yomzimba we-valve inesiteshi sokusiza.
Isakhiwo se-valve ye-plug ye-DBB sihlukaniswe izingxenye ezinhlanu: i-bonnet engenhla, i-plug, isihlalo sendandatho yokuvala, umzimba we-valve kanye ne-bonnet engezansi.
Umzimba wepulaki wevalvu yepulaki ye-DBB wakhiwe ngepulaki yevalvu ekhonikhi kanye namadiski amabili evalvu ukwakha umzimba wepulaki oyi-cylindrical. Amadiski evalvu kuzo zombili izinhlangothi afakwe ubuso bokuvala irabha, kanti phakathi kuyipulaki ye-conical wedge. Lapho ivalvu ivuliwe, indlela yokudlulisa yenza ipulaki yevalvu ikhuphuke, futhi iqhube amadiski evalvu kuzo zombili izinhlangothi ukuze ivale, ukuze uphawu lwediski yevalvu kanye nobuso bokuvala umzimba wevalvu kuhlukaniswe, bese iqhubela umzimba weplaki ukuthi ujikeleze ngo-90° endaweni evulekile ngokuphelele yevalvu. Lapho ivalvu ivaliwe, indlela yokudlulisa ijikelezisa ipulaki yevalvu ngo-90° endaweni evaliwe, bese isunduza ipulaki yevalvu ukuthi yehle, amadiski evalvu kuzo zombili izinhlangothi athinte phansi komzimba wevalvu futhi angabe esahamba phansi, ipulaki yevalvu ephakathi iyaqhubeka yehla, futhi izinhlangothi ezimbili zevalvu zicindezelwa yindiza ethambekele. Idiski iya endaweni yokuvala yomzimba wevalvu, ukuze ubuso bokuvala obuthambile bediski kanye nobuso bokuvala umzimba wevalvu kucindezelwe ukuze kufezwe ukuvalwa. Isenzo sokungqubuzana singaqinisekisa impilo yenkonzo yepulaki yevalvu yediski.
2. Izinzuzo ze-valve ye-plug ye-DBB
Ama-valve e-DBB plug ane-sealing trust ephezulu kakhulu. Ngokusebenzisa i-wedge shaped cock ehlukile, ithrekhi enomumo we-L kanye nomklamo okhethekile womqhubi, i-valve disc seal kanye ne-valve body sealing surface ziyahlukaniswa ngesikhathi sokusebenza kwe-valve, ngaleyo ndlela kugwenywe ukungqubuzana, kuqedwe ukuguguleka kwe-seal futhi kwandise impilo ye-valve. Impilo yesevisi ithuthukisa ukuthembeka kwe-valve. Ngesikhathi esifanayo, ukucushwa okujwayelekile kohlelo lokusiza ukushisa kuqinisekisa ukuphepha kanye nokusebenza kalula kwe-valve ngokuvala ngokuphelele, futhi ngesikhathi esifanayo kunikeza ukuqinisekiswa kwe-inthanethi kokuvala okuqinile kwe-valve.
Izici eziyisithupha ze-valve ye-plug ye-DBB
1) Ivalvu iyivalvu yokuvala esebenzayo, esebenzisa umklamo we-conical cock, ayinciki ekucindezelweni kwepayipi kanye namandla okuqinisa intwasahlobo, isebenzisa isakhiwo sokuvala kabili, futhi yakha uphawu oluzimele olungenalo ukuvuza kwamanzi oluvela phezulu naphansi, futhi ivalvu inokwethenjelwa okuphezulu.
2) Umklamo oyingqayizivele womqhubi kanye nesitimela sokuqondisa esimise okwe-L uhlukanisa ngokuphelele uphawu lwediski ye-valve ebusweni bokuvala umzimba we-valve ngesikhathi sokusebenza kwe-valve, okususa ukuguguleka kophawu. I-torque yokusebenza kwe-valve incane, ifaneleka ngezikhathi zokusebenza njalo, futhi i-valve ihlala isikhathi eside.
3) Ukulungiswa kwevalvu ku-inthanethi kulula futhi kulula. Ivalvu ye-DBB ilula ngesakhiwo futhi ingalungiswa ngaphandle kokuyisusa emgqeni. Isembozo esingezansi singasuswa ukuze kususwe islayidi phansi, noma isembozo sevalvu singasuswa ukuze kususwe islayidi phezulu. Ivalvu ye-DBB incane ngosayizi, ilula ngesisindo, ilungele ukuhlukaniswa nokugcinwa, ilula futhi iyashesha, futhi ayidingi imishini emikhulu yokuphakamisa.
4) Uhlelo olujwayelekile lokusiza ukushisa lwevalvu yepulaki ye-DBB lukhipha ngokuzenzakalelayo ingcindezi yesikhala sevalvu lapho kwenzeka ukucindezela ngokweqile, okuvumela ukuhlolwa kwe-inthanethi ngesikhathi sangempela kanye nokuqinisekiswa kokuvalwa kwevalvu.
5) Isibonakaliso sesikhathi sangempela sendawo yevalvu, kanye nenaliti yesikhombisi esiqwini sevalvu kungaphendula isimo sesikhathi sangempela sevalvu.
6) Indawo yokukhipha indle engezansi ingakhipha ukungcola, futhi ingakhipha amanzi emgodini wevalvu ebusika ukuvimbela umzimba wevalvu ukuthi ungonakali ngenxa yokwanda komthamo lapho amanzi eqanda.
3. Ukuhlaziywa kokuhluleka kwe-valve yepulaki ye-DBB
1) Iphini lokuqondisa liphukile. Iphini lokuqondisa linamathele kubhrakhethi yokuthwala isiqu se-valve, kanti olunye uhlangothi luboshwe ngemikhono ku-groove yokuqondisa enomumo we-L ku-sleeve yesiqu se-valve. Lapho isiqu se-valve sivula futhi sivala ngaphansi kwesenzo se-actuator, iphini lokuqondisa livinjelwa yi-groove yokuqondisa, ngakho-ke i-valve iyakhiwa. Lapho i-valve ivuliwe, ipulaki iyaphakanyiswa bese ijikeleziswa ngo-90°, futhi lapho i-valve ivaliwe, ijikeleziswa ngo-90° bese icindezelwa phansi.
Isenzo sesiqu se-valve ngaphansi kwesenzo sephini yomhlahlandlela singahlukaniswa sibe isenzo sokujikeleza okuvundlile kanye nesenzo sokukhuphuka nokuhla phezulu. Lapho i-valve ivuliwe, isiqu se-valve siqhuba umsele omise okwe-L ukuba ukhuphuke ngokuvundlile kuze kube yilapho iphini yomhlahlandlela ifinyelela endaweni yokujika yomsele omise okwe-L, isivinini esiqondile sehla siye ku-0, futhi isiqondiso esiqondile sisheshisa ukujikeleza; lapho i-valve ivaliwe, isiqu se-valve siqhuba umsele omise okwe-L ukuthi ujikeleze ngendlela evundlile. Lapho iphini yomhlahlandlela ifika endaweni yokujika yomsele omise okwe-L, ukwehla okuvundlile kuba ngu-0, futhi isiqondiso esiqondile siyasheshisa futhi sicindezele phansi. Ngakho-ke, iphini yomhlahlandlela ifakwa emandleni amakhulu lapho umsele omise okwe-L uphenduka, futhi kulula kakhulu ukuthola amandla okushaya eziqondisweni ezivundlile neziqondile ngesikhathi esisodwa. Amaphini omhlahlandlela aphukile.
Ngemva kokuba iphini lokuqondisa liphukile, ivalvu isesimweni lapho iplagi yevalvu iphakanyisiwe kodwa iplagi yevalvu ingajikeleziswanga, futhi ububanzi beplagi yevalvu buqondile kububanzi bomzimba wevalvu. Igebe liyadlula kodwa alifinyeleli endaweni evulekile ngokuphelele. Kusukela ekujikelezeni kwe-medium edlulayo, kungahlulelwa ukuthi iphini lokuqondisa levalvu liphukile yini. Enye indlela yokwahlulela ukuphuka kwephini lokuqondisa ukubheka ukuthi iphini lokubonisa elibekwe ekugcineni kwesiqu sevalvu livulekile yini lapho ivalvu ishintshwa. Isenzo sokujikeleza.
2) Ukufakwa kokungcola. Njengoba kukhona igebe elikhulu phakathi kwepulaki yevalvu kanye nomgodi wevalvu futhi ukujula komgodi wevalvu ohlangothini oluqondile kuphansi kunowepayipi, ukungcola kufakwa phansi komgodi wevalvu lapho uketshezi ludlula. Lapho ivalvu ivaliwe, ipulaki yevalvu icindezelwa phansi, bese ukungcola okufakiwe kususwa yipulaki yevalvu. Iyasicaba phansi komgodi wevalvu, futhi ngemva kokufakwa kaningana bese kuba yiphansi, kwakheka ungqimba lokungcola “kwedwala elithungelwe yitshe”. Lapho ubukhulu bongqimba lokungcola budlula igebe phakathi kwepulaki yevalvu kanye nesihlalo sevalvu futhi bungasakwazi ukucindezelwa, kuzovimbela ukushaywa kwepulaki yevalvu. Isenzo sibangela ukuthi ivalvu ingavali kahle noma idlulele.
(3) Ukuvuza kwangaphakathi kwevalvu. Ukuvuza kwangaphakathi kwevalvu kungukulimala okubulalayo kwevalvu yokuvala. Uma ukuvuza kwangaphakathi kukhulu, ukuthembeka kwevalvu kwehla. Ukuvuza kwangaphakathi kwevalvu yokushintsha uwoyela kungabangela izingozi ezinkulu zekhwalithi kawoyela, ngakho-ke ukukhetha ivalvu yokushintsha uwoyela kudinga ukucatshangelwa. Umsebenzi wokuthola ukuvuza kwangaphakathi kwevalvu kanye nobunzima bokwelashwa kokuvuza kwangaphakathi. Ivalvu yepulaki ye-DBB inomsebenzi wokuthola ukuvuza kwangaphakathi olula futhi olula ukuwusebenzisa kanye nendlela yokwelapha ukuvuza kwangaphakathi, kanye nesakhiwo sevalvu yokuvala esinezinhlangothi ezimbili sevalvu yepulaki ye-DBB siyenza ibe nomsebenzi wokusika onokwethenjelwa, ngakho-ke ivalvu yokushintsha umkhiqizo kawoyela yepayipi kawoyela elicwengisisiwe isebenzisa kakhulu iplaki ye-DBB.
Indlela yokuthola ukuvuza kwangaphakathi kwevalvu yepulaki ye-DBB: vula ivalvu yokusiza ukushisa kwevalvu, uma kukhona okuphakathi okuphumayo, kuyayeka ukuphuma, okufakazela ukuthi ivalvu ayinakho ukuvuza kwangaphakathi, futhi okuphakathi kokuphumayo kuyindlela yokukhulula ingcindezi ekhona emgodini wepulaki yevalvu; uma kukhona ukuphuma okuphakathi okuqhubekayo, kufakazelwa ukuthi ivalvu inokuvuza kwangaphakathi, kodwa akunakwenzeka ukuthola ukuthi yiluphi uhlangothi lwevalvu olunokuvuza kwangaphakathi. Kuphela ngokuyihlukanisa ivalvu lapho singazi khona isimo esithile sokuvuza kwangaphakathi. Indlela yokuthola ukuvuza kwangaphakathi kwevalvu ye-DBB ingenza ukutholwa okusheshayo endaweni, futhi ingathola ukuvuza kwangaphakathi kwevalvu lapho ishintsha phakathi kwezinqubo ezahlukene zomkhiqizo kawoyela, ukuze kuvinjelwe izingozi zekhwalithi yomkhiqizo kawoyela.
4. Ukudiliza nokuhlola i-valve yepulaki ye-DBB
Ukuhlolwa nokugcinwa kuhlanganisa ukuhlolwa kwe-inthanethi nokuhlolwa okungaxhunyiwe ku-inthanethi. Ngesikhathi sokulungiswa kwe-inthanethi, umzimba we-valve kanye ne-flange kugcinwa epayipini, futhi injongo yokugcinwa kufezwa ngokuhlakaza izingxenye ze-valve.
Ukuhlukaniswa nokuhlolwa kwevalvu yepulaki ye-DBB kuhlukaniswe ngendlela yokuhlukaniswa engenhla kanye nendlela yokuhlukaniswa engezansi. Indlela yokuhlukaniswa engenhla ihloselwe kakhulu izinkinga ezikhona engxenyeni engenhla yomzimba wevalvu njengesiqu sevalvu, ipuleti lesembozo esingaphezulu, i-actuator, kanye nepulaki yevalvu. Indlela yokuhlukaniswa ihloselwe kakhulu izinkinga ezikhona ekugcineni kwezivalo ezingezansi, amadiski evalvu, amapuleti esembozo esingezansi, kanye namavalvu endle.
Indlela yokuqhaqha phezulu isusa i-actuator, isivikelo sesiqu se-valve, i-sealing gland, kanye nesembozo esingaphezulu somzimba we-valve ngokulandelana, bese iphakamisa isiqu se-valve kanye ne-valve plug. Uma usebenzisa indlela ephezulu-phansi, ngenxa yokusikwa nokucindezelwa kwe-packing seal ngesikhathi sokufakwa kanye nokuguguleka kwe-valve stem ngesikhathi senqubo yokuvulwa nokuvalwa kwe-valve, ayikwazi ukusetshenziswa kabusha. Vula i-valve endaweni evulekile kusengaphambili ukuze uvimbele i-valve plug ukuthi ingasuswa kalula lapho ama-valve disc ezinhlangothini zombili ecindezelwa.
Indlela yokudiliza idinga kuphela ukususa isembozo esingezansi esingezansi ukuze kulungiswe izingxenye ezifanele. Uma usebenzisa indlela yokudiliza ukuhlola idiski yevalvu, ivalvu ayikwazi ukufakwa endaweni evaliwe ngokuphelele, ukuze kugwenywe ukuthi idiski yevalvu ayikwazi ukukhishwa lapho ivalvu icindezelwa. Ngenxa yokuxhumana okuhambayo phakathi kwediski yevalvu kanye nepulaki yevalvu ngomsele wedovetail, isembozo esingezansi asikwazi ukususwa ngesikhathi esisodwa lapho isembozo esingezansi sisuswa, ukuze kuvinjelwe ukuthi indawo yokuvala ingonakali ngenxa yokuwa kwediski yevalvu.
Indlela yokuqhaqha engaphezulu kanye nendlela yokuqhaqha engezansi yevalvu ye-DBB akudingeki ukuthi ihambise umzimba wevalvu, ngakho-ke ukulungiswa kwe-inthanethi kungafezwa. Inqubo yokukhulula ukushisa isethwe emzimbeni wevalvu, ngakho-ke indlela yokuqhaqha ephezulu kanye nendlela yokuqhaqha engezansi akudingeki ukuthi ihlukanise inqubo yokukhulula ukushisa, okwenza inqubo yokulungisa ibe lula futhi ithuthukise ukusebenza kahle kokulungisa. Ukuqhaqha nokuhlola akubandakanyi umzimba oyinhloko womzimba wevalvu, kodwa ivalvu idinga ukuvalwa ngokuphelele ukuze kuvinjelwe ukuthi i-medium ingagcwali.
5. Isiphetho
Ukuxilongwa kwephutha le-valve ye-plug ye-DBB kuyabikezelwa futhi kuyaqagela. Ngokusekelwe emsebenzini wayo wokuthola ukuvuza kwangaphakathi okulula, iphutha langaphakathi lokuvuza lingahlolwa ngokushesha, futhi izici zokusebenza zokuhlola nokulungisa ezilula nezilula ukuzisebenzisa zingafeza ukulungiswa ngezikhathi ezithile. Ngakho-ke, uhlelo lokuhlola nokulungisa lwama-valve e-plug ye-DBB nalo lushintshile kusukela ekulungisweni kwendabuko ngemva kokwehluleka kuya ohlelweni lokuhlola nokulungisa oluhlanganisa ukulungiswa kwangaphambili, ukulungiswa kwangemva kwesehlakalo kanye nokulungiswa okuvamile.
Isikhathi sokuthunyelwe: Disemba-22-2022