Ifanele ukulungiselelwa kwei-valve yesango, i-valve yomhlaba, i-valve yebhola, uvemvane valvekanye ne-valve yokunciphisa ingcindezi kumishini ye-petrochemical.Hlola i-valve, i-valve yokuphepha, i-valve elawulayo, isethi yesicupho bheka imithethonqubo efanele.Akufanele ukusetha ama-valve emanzini angaphansi komhlaba namapayipi okukhipha amanzi.
1. Izimiso zesakhiwo se-valve
1.1 Amavalvu azosethwa ngokohlobo nenani elikhonjiswe eshadini lokugeleza le-PID lamapayipi nezinsimbi.Lapho i-PID inezidingo eziqondile zokuma kokufakwa kwamanye ama-valve, kufanele isethwe ngokuvumelana nezidingo zenqubo.
1.2 Amavalvu kufanele ahlelwe endaweni okufinyeleleka kalula kuyo, okusebenziseka kalula futhi okulula ukuyinakekela.Amavalvu emigqeni yamapayipi kufanele ahlelwe phakathi nendawo, kucatshangelwe amapulatifomu okusebenza noma izitebhisi.
2. Izidingo zokuma kwe-valve
2.1 Amavalvu anqanyuliwe azomiswa lapho amapayipi egalari yamapayipi emishini yokungena neyokuphuma exhunywe nomphathi wegalari yamapayipi embonini yonke.Indawo yokufaka i-valve kufanele ihlelwe phakathi ohlangothini olulodwa lwendawo yedivayisi, futhi isiteji sokusebenza esidingekayo noma isiteji sokulungisa kufanele simiswe.
2.2 Amavalvu adinga ukusebenza njalo, ukulungiswa kanye nokushintshwa kwawo kufanele abekwe endaweni okufinyeleleka kalula kuyo phansi, ipulatifomu noma iladi.Amavalvu omoya kanye nawogesi kufanele ahlelwe ezindaweni ezifinyeleleka kalula.
2.3 Amavalvu angadingi ukuthi asetshenziswe njalo (ngowokuvulwa kanye nokumiswa kuphela) kufanele nawo abekwe endaweni lapho amaladi esikhashana angamiswa khona uma engakwazi ukuhlinzwa phansi.
2.4 Isikhungo sesondo lesandla se-valve kufanele sibe ngama-750 ~ 1500mm kude nendawo yokusebenza, futhi ukuphakama okufanele kakhulu kube ngu-1200mm.Ukuphakama kokufakwa kwe-valve okungadingi ukusebenza njalo kungafinyelela ku-1500 ~ 1800mm.Lapho ukuphakama kokufaka kungenakuncishiswa futhi ukusebenza okuvamile kuyadingeka, iplatifomu yokusebenza noma inyathela kufanele isethwe ekwakhiweni.Amavalvu amapayipi namathuluzi anemidiya eyingozi akufanele abekwe phakathi kwebanga lobude bekhanda lomuntu.
2.5 Uma isikhungo se-valve handwheel singaphezu kuka-1800mm ukusuka ekuphakameni kwendawo yokusebenza, kufanelekile ukusetha ukusebenza kwe-sprocket.Iketango le-sprocket kufanele libe ngu-800mm ukusuka phansi, futhi i-chain hook kufanele isethwe ukuze ilengise isiphetho esingezansi seketango odongeni oluseduze noma eposini, ukuze lingaphazamisi iphaseji.
2.6 Ngevalvu efakwe emseleni, lapho ikhava yomsele ivuliwe futhi ingasebenza, isondo lesandla levalvu akufanele libe ngaphansi kuka-300mm ngaphansi kwekhava yomsele.Uma ingaphansi kuka-300mm, i-extension lever yevalvu kufanele isethwe ukuze isondo lesandla libe ngaphansi kuka-100mm ngaphansi kwekhava yomsele.
2.7 Lapho i-valve efakwe emgodini wepayipi idinga ukusetshenzwa phansi, noma i-valve ifakwe ngaphansi kwesitezi esingaphezulu (i-platform), i-valve extension rod ingasethwa ukuthi inwebeke epuleti lekhava lomsele, phansi kanye nesiteji ukuze sisebenze, kanye ne-elongation rod isandla sesondo ibanga indawo yokusebenza engu-1200mm ifanelekile.Amavalvu anama-diameter ajwayelekile we-DN40 noma ngaphansi futhi axhumeke ngentambo akufanele asetshenziswe ngama-sprockets noma ama-extender rods ukugwema ukulimala kuvalvu.Ngokuvamile, ama-valve kufanele asetshenziswe nge-sprocket encane noma induku yokwandisa ngangokunokwenzeka.
2.8 Ibanga eliphakathi kwesondo lesandla se-valve elihlelwe ngokuzungeza ipulatifomu kanye nonqenqema lwepulatifomu akufanele libe ngaphezu kwama-450 mm.Lapho isiqu se-valve ne-handwheel sifinyelela phezulu kwesiteji futhi ukuphakama kungaphansi kuka-2000 mm, akufanele kuthinte ukusebenza nokudlula komqhubi, ukuze kungabangela ukulimala komuntu siqu.
3. Izidingo zokubeka ama-valve amakhulu
3.1 Ukusebenza kwamavalvu amakhulu kufanele kusebenzise indlela yokudlulisa igiya, futhi indawo esikuyo edingwa umshini wokudlulisa kufanele kubhekwe lapho kusetha.
3.2 Ukusekela kufanele kubekwe ohlangothini olulodwa noma zombili izinhlangothi zevalvu kumavalvu amakhulu.Ukusekela akufanele kubekwe epayipini elifushane elidinga ukususwa ngesikhathi sokulungiswa, futhi ukusekelwa kwepayipi akufanele kuthinteke lapho kukhishwa i-valve.Ngokuvamile, ibanga phakathi kokusekela kanye ne-valve flange kufanele libe likhulu kuno-300mm.
3.3 Indawo yokufaka ama-valve amakhulu kufanele ibe nendawo yokusebenzisa ukhreyini, noma ucabangele ukusetha i-davit ne-hanging beam.
4. Izidingo zama-valve kumapayipi avundlile
4.1 Ngaphandle kwezidingo ezikhethekile zenqubo, isondo lesandla sevalvu elifakwe epayipini elivundlile elivamile akufanele liye phansi, ikakhulukazi ivalvu esemgqeni ophakathi nendawo oyingozi wenqatshelwe ngokuphelele.Ukuma kwesondo lesandla se-valve kunqunywa ngohlelo olulandelayo:Iqonde phezulu phezulu; kanye ne-orizontal; ibheke phezulu phezulu kwesokunxele kanye netsheke kwesokudla 45°;itsheke phansi ngokuqondile kwesokunxele nakwesokudla 45°;hhayi ukuya phansi mpo.
4.2 I-valve ye-valve ephakanyisiwe ivundlile, lapho i-valve ivulwa, isiqu se-valve ngeke sithinte i-passage, ikakhulukazi uma isiqu se-valve sitholakala ekhanda noma edolweni lomqhubi.
5. Ezinye izidingo zokusetha i-valve
5.1 Umugqa ophakathi nendawo wamapayipi kumapayipi ahambisanayo kufanele ube ococeke ngangokunokwenzeka.Lapho i-valve ihlelwe eduze komunye nomunye, ibanga elicacile phakathi kwamasondo ezandla akufanele libe ngaphansi kuka-100mm;Ama-valve nawo angase anyakaziswe ukuze kuncishiswe isikhala samapayipi.
5.2 Ivalvu edingekayo ukuze ixhunywe kumbhobho wezisetshenziswa ngesikhathi kuqhubeka inqubo kufanele ixhunywe ngokuqondile kumbobo yesisetshenziswa uma i-diameter yegama, ukucindezela okulinganiselwe kanye nohlobo lwendawo yokuvala kufana noma kufaniswe ne-flange ye-nozzle yemishini.Uma i-valve iyi-concave flange, kuyadingeka ukuthi ucele uchwepheshe wemishini ukuthi alungise i-convex flange ku-nozzle ehambisanayo.
5.3 Ngaphandle uma inqubo inezidingo ezikhethekile, ama-valve asemapayipini angaphansi emibhoshongo, ama-reactors, imikhumbi eqondile kanye nezinye izinto zokusebenza akufanele ahlelwe esiketini.
5.4 Uma ipayipi legatsha lidonswa epayipini elikhulu, i-valve yokusika kufanele ibekwe engxenyeni evundlile yepayipi legatsha eduze kwempande yepayipi elikhulu, ukuze uketshezi lukhishwe ezinhlangothini zombili zevalvu.
5.5 Ivalvu yokunqamula ipayipi legatsha kugalari yamapayipi ayivamisile ukusetshenzelwa (ukumisa nokunakekela kuphela).Uma lingekho iladi elihlala njalo, kufanele kubekelwe eceleni indawo okuzosetshenziswa kuyo isitebhisi sesikhashana.
I-5.6 Uma i-valve ephezulu yokucindezela ivuliwe, amandla okuqala makhulu, futhi ukusekelwa kufanele kusethelwe ukusekela i-valve nokunciphisa ukucindezeleka kokuqala.Ubude bokufaka kufanele bube ngu-500 ~ 1200mm.
5.7 Ivalvu yamanzi omlilo kanye nevalve yesitimu somlilo endaweni yomngcele wocingo kufanele kusatshalaliswe endaweni ephephile lapho u-opharetha efinyelela khona kalula uma kwenzeka ingozi.
5.8 Iqembu lamavalvu epayipi lokusabalalisa isitimu esicisha umlilo lesithando sokushisa kufanele libe lula ukusebenza, futhi ibanga phakathi kwepayipi lokusabalalisa nomzimba wesithando akumele libe ngaphansi kuka-7.5m.
5.9 Lapho ufaka ivalvu exhunywe intambo epayipini, ilunga eliphilayo kufanele lifakwe eduze kwevalvu ukuze lihlakazwe.
5.10 Ivalve yokubopha nomauvemvane valveakufanele ixhunywe ngokuqondile nama-flanges amanye ama-valve kanye nokufakwa, futhi ipayipi elifushane elinama-flange kuzo zombili iziphetho kufanele lifakwe phakathi.
5.11 I-valve akufanele ithwale umthwalo wangaphandle, ukuze ungalimazi i-valve ngenxa yokucindezeleka ngokweqile.
Isikhathi sokuthumela: Feb-02-2023