A ivalve yesangosisivalo esihla sisinyuka sinyuka ngomgca othe tye ecaleni kwesitulo sevalve (umphezulu wokutywina), kunye nendawo yokuvula kunye nokuvala (isango) iqhutywa sisikhondo sevalve.

1. Yintoni aivalve yesangoyenza

Uhlobo lwevalve yokuvala ebizwa ngokuba yivalve yesango isetyenziselwa ukudibanisa okanye ukukhulula unxibelelwano kumbhobho.Ivalve yesango inosetyenziso oluninzi olwahlukileyo.Iivalve zesango ezisetyenziswa ngokuqhelekileyo ezenziwe e-China zineempawu zokusebenza ezilandelayo: uxinzelelo lwe-PN1760, ubungakanani obuqhelekileyo be-DN151800, kunye nokushisa okusebenzayo kwe-t610 ° C.

2. Iimpawu zeivalve yesango

① Izibonelelo zevalvu yesango

A. Kuncinane ukuxhathisa ulwelo.Indawo ephakathi ayitshintshi indlela yokuhamba kwayo xa idlula kwivalve yesango kuba umjelo ophakathi ngaphakathi kumzimba wevalvu yesango uthe tye, nto leyo enciphisa ukuxhathisa ulwelo.

B. Kukho ukuchasana okuncinci ngexesha lokuvula kunye nokuvala.Xa kuthelekiswa nevalve yeglowubhu, ukuvulwa kunye nokuvalwa kwevalve yesango akusindisi kangako umsebenzi kuba indlela yesango lokuhamba ixhomekeke kwicala lokuhamba.

C. Indlela yokuqukuqela okuphakathi ayithintelwanga.Ekubeni i-medium inokuqukuqela kulo naliphi na icala ukusuka nakweliphi na icala levalve yesango, inokusebenza injongo yayo kwaye ifaneleke ngakumbi kwimibhobho apho indlela yokuhamba kwemidiya inokutshintsha.

D. Sisakhiwo esifutshane.Ubude besakhiwo seglowubhu mfutshane kunobo bevalve yesango ngenxa yokuba idiski yevalve yeglowubhu ibekwe ngokuthe tye kumzimba wevalvu ngelixa ivalve yesango yevalve ibekwe ngokuthe nkqo ngaphakathi kumzimba wevalvu.

E. Izakhono zokutywina ezisebenzayo.Umphezulu wokutywina awuthotywanga xa uvulwe ngokupheleleyo.

② Iingxaki zevalve yesango

A. Kulula ukwenzakalisa umphezulu wokutywina.Umphezulu wokutywina wesango kunye nesihlalo sevalve sifumana ukukhuhlana xa zivula kwaye zivala, zonakala lula kwaye zinciphisa ukusebenza kokutywinwa kunye nobomi.

B. Umphakamo mkhulu kwaye amaxesha okuvula nawokuvala made.I-stroke yeplate yesango inkulu, indawo ethile iyadingeka ekuvuleni, kwaye i-dimension yangaphandle iphezulu kuba i-valve yesango kufuneka ivulwe ngokupheleleyo okanye ivalwe ngokupheleleyo ngelixa ivula kwaye ivala.

Isakhiwo esiyinkimbinkimbi, unobumba C. Xa kuthelekiswa nevalve yehlabathi, kukho iindawo ezininzi, kunzima kakhulu ukuvelisa nokugcina, kwaye kubiza ngaphezulu.

3. Ukwakhiwa kwevalve yesango

Umzimba wevalve, ibhonethi okanye isibiyeli, isiqu sevalve, isiqu sevalve, ipleyiti yesango, isitulo sevalvu, isangqa sokupakisha, ukupakisha ukutywina, idlala lokupakisha, kunye nesixhobo sokuhambisa zenza uninzi lwevalve yesango.

Ivalve yokudlula (ivalve yokumisa) inokudityaniswa ngokunxuseneyo kwimibhobho yokungena kunye neyokuphuma ecaleni kobubanzi obukhulu okanye iivalvu zesango zoxinzelelo oluphezulu ukuze kuncitshiswe itorque yokuvula kunye nokuvala.Vula ivalve yokudlula phambi kokuvula ivalve yesango xa usebenzisa ukulinganisa uxinzelelo macala omabini esango.Ivalve ye-bypass ubukhulu begama yi-DN32 okanye ngaphezulu.

① Umzimba wevalvu, owenza isahlulo esithwele uxinzelelo kumjelo ophakathi kunye nowona mzimba wevalve yesango, uncanyathiselwe ngokuthe ngqo kumbhobho okanye (isixhobo).Kubalulekile ekubekeni isitulo sevalve endaweni, ukuxhoma isigqubuthelo sevalvu, kunye nokudibanisa umbhobho.Umphakamo wegumbi levalvu engaphakathi mkhulu kakhulu kuba isango elimilise idiskhi, elithe nkqo kwaye linyuka lisihla, lifuna ukungena ngaphakathi kumzimba wevalvu.Uxinzelelo lwegama ubukhulu becala lumisela indlela i-valve body cross-section ebunjwe ngayo.Umzekelo, isivalo sevalvu yesango enoxinzelelo olusezantsi lunokuthi luthiwe tyaba ukuze lube mfutshane ubude bolwakhiwo lwalo.

Kumzimba wevalvu, uninzi lweepaseji eziphakathi zinesetyhula enqumlayo.I-Shrinkage yindlela enokuthi isetyenziswe kwiivalvu zesango ezinobubanzi obukhulu ukuthoba ubungakanani besango, amandla okuvula kunye nokuvala, kunye ne-torque.Xa i-shrinkage isetyenzisiwe, ukunyanzeliswa kwamanzi kwi-valve kuyanda, kubangela ukuhla koxinzelelo kunye nokunyuka kweendleko zamandla.Umlinganiselo wokucutheka kweshaneli kufuneka ngoko ungabi kakhulu.I-busbar ye-engile yokuthambekela yetshaneli emxinwa ukuya kumgca osembindini akufunekanga ibe ngaphezu kwe-12 °, kwaye umlinganiselo we-diameter yesihlalo sevalve kwidayamitha yayo yesiqhelo kufuneka ibe phakathi kwe-0.8 kunye ne-0.95.

Uqhagamshelo phakathi komzimba wevalve kunye nombhobho, kunye nomzimba wevalve kunye nebhonethi, kumiselwa yisakhiwo somzimba wevalvu yesango.I-cast, i-forged, i-welding ye-forged, i-welding ye-cast, kunye ne-tube plate welding zizo zonke iindlela zokukhetha uburhabaxa bomzimba wevalvu.Kwiidayamitha eziphantsi kwe-DN50, imizimba yevalve yokuphosa idla ngokusetyenziswa, imizimba yevalve engumqobo idla ngokusetyenziswa, iivalvu eziphothiweyo ziqhele ukusetyenziselwa ukujula okudityanisiweyo okusilelayo kwiinkcukacha, kunye nolwakhiwo oludityanisiweyo oludityanisiweyo nalo lunokusetyenziswa.Imizimba yeevalvu ezidityanisiweyo zidla ngokusetyenziselwa iivalvu ezineengxaki kwinkqubo yokubumba iyonke.

②Isigqubuthelo sevalvu sinebhokisi yokuhlohla kuso kwaye sincanyathiselwe kumzimba wevalvu, nto leyo eyenza ukuba ibe yeyona nto iphambili yoxinzelelo lwegumbi loxinzelelo.Isigqubuthelo sevalvu sixhotyiswe ngomphezulu womatshini wokuxhasa amacandelo, njengamandongomane esiqu okanye iindlela zothumelo, kwizivalo zedayamitha ephakathi nezincinci.

③I-stem nut okanye amanye amalungu esixhobo sothumelo axhaswa sisibiyeli, esincanyathiselwe kwibhonethi.

④Isiqu sevalve sidityaniswe ngokuthe ngqo ne-stem nut okanye isixhobo sokuhambisa.Inxalenye yentonga epholisiweyo kunye nokupakishwa kwakha isibini sokutywina, esinokuhambisa i-torque kwaye sidlale indima yokuvula nokuvala isango.Ngokwendawo yomsonto kwisiqu sevalve, ivalve yesango lesikhondo kunye nevalve yesango efihliweyo iyahlulwa.

A. Ivalve yesango lesiqu esinyukayo yileyo inentambo yothumelo engaphandle komngxuma womzimba kwaye nesikhondo sevalve yayo inokunyuka ihle inyuke.I-stem nut kwisibiyeli okanye kwibhonethi kufuneka ijikelezwe ukuze kunyuswe isikhondo sevalve.Umsonto wesiqu kunye ne-stem nut azidibanisi nendawo kwaye ngoko ke azichatshazelwa bubushushu obuphakathi kunye nokuhlwa, nto leyo eyenza ukuba zithandwa.I-stem nut inokujikeleza kuphela ngaphandle kokuhamba phezulu nangaphantsi, okunenzuzo ekuthambiseni i-valve stem.Ukuvuleka kwesango nako kucacile.

B. Iivalvu zesango lesikhondo esimnyama zinomsonto wothumelo obekwe ngaphakathi kumngxuma womzimba kunye nesiqu sevalve ejikelezayo.Ukujikelezisa isiqu sevalve kuqhuba i-stem nut kwipleyiti yesango, okubangela ukuba isiqu sevalve sinyuke kwaye siwe.Isiqu sevalve sinokujikeleza kuphela, singashenxi phezulu okanye ezantsi.Ivalve kunzima ukuyilawula ngenxa yobude bayo obuncinci kunye nobunzima bokuvula nokuvala.Izalathi mazifakwe.Ilungele indawo engadlekiyo kunye neemeko ezinemozulu engathandekiyo ngenxa yokuba iqondo lobushushu kunye nokuhlwa kwesiphumo esiphakathi kukudibana phakathi komsonto wesikhondo sevalve kunye ne-stem nut kunye nendawo.

⑤Inxalenye ye-kinematic pair enokuthi idityaniswe ngokuthe ngqo kwisixhobo sokuhambisa kunye ne-torque yokuhambisa yenziwe nge-valve stem nut kunye neqela le-valve stem thread.

⑥Isikhondo sevalve okanye i-stem nut inokubonelelwa ngokuthe ngqo ngamandla ombane, amandla omoya, amandla omoya, kunye nokusebenza ngesixhobo sothumelo.Ukuqhuba umgama omde kwizixhobo zombane kudla ngokusetyenziswa amavili ezandla, izigqubuthelo zevalvu, iinxalenye zothumelo, iishafti zokuqhagamshela, kunye nokudityaniswa kwendawo yonke.

⑦Isihlalo sevalve Ukuqengqeleka, ukuwelda, ukudityaniswa kwentambo, kunye nezinye iindlela zobuchule zisetyenziselwa ukukhusela isitulo sevalvu kumzimba wevalvu ukuze sitywinwe ngesango.

⑧ Ngokuxhomekeke kwiimfuno zomthengi, umsesane wokutywina unokugqithwa ngokuthe ngqo kumzimba wevalve ukwenza umphezulu wokutywina.Umphezulu wokutywina unokunyangwa ngokuthe ngqo kumzimba wevalvu kwiivalvu ezenziwe ngezinto ezifana nentsimbi etyhidiweyo, intsimbi engatyiwa yiaustenitic, kunye nealloy yobhedu.Ukuthintela ukuvuza okuphakathi ecaleni kwesikhondo sevalve, ukupakisha kufakwa ngaphakathi kwebhokisi yokufaka izinto (ibhokisi yokufaka izinto).