Intshayelelo:Ivalvu yebhola yaphuma ngeminyaka yoo-1950. Ngophuhliso olukhawulezileyo lwesayensi netekhnoloji, uphuculo oluqhubekayo lwetekhnoloji yemveliso kunye nolwakhiwo lwemveliso, iye yakhula ngokukhawuleza yaba luhlobo olukhulu lweevalvu kwiminyaka engama-50 kuphela. Kumazwe aseNtshona aphuhlileyo, ukusetyenziswa kweevalvu zebhola kuyanda minyaka le.
Ivalvu yebhola isetyenziselwa kakhulu ukusika, ukusasaza nokutshintsha indlela yokuhamba kwesixhobo esikwipayipi. Ifuna ukujikeleziswa kuphela ngama-90 degrees kwaye i-torque encinci ingavalwa kakuhle. Ivalvu yebhola ifanelekile kakhulu ukusetyenziswa njengeswitshi kunye nevalvu yokuvala.
Ekubeni ivalvu yebhola idla ngokusebenzisa irabha, i-nylon kunye ne-polytetrafluoroethylene njengezinto ezisetyenziswa kwisitywina sesihlalo, ubushushu bayo bokusebenza bunqunyelwe zizinto ezisetyenziswa kwisitywina sesihlalo. Umsebenzi wokusika ivalvu yebhola wenziwa ngokucinezela ibhola yesinyithi kwisihlalo sevalvu yeplastiki phantsi kwesenzo se-medium (ivalvu yebhola edadayo). Phantsi kwesenzo soxinzelelo oluthile loqhagamshelwano, iringi yokutywina isihlalo sevalvu idlula kwi-elastic-plastic deformation kwiindawo zasekuhlaleni. Olu tshintsho lunokubuyisela ukuchaneka kokwenziwa kunye noburhabaxa bomphezulu webhola, kwaye luqinisekise ukusebenza kotywino lwevalvu yebhola.
Kwaye ngenxa yokuba iringi yokutywina isihlalo sevalvu yevalvu yebhola idla ngokwenziwa ngeplastiki, xa kukhethwa ulwakhiwo kunye nokusebenza kwevalvu yebhola, ukumelana nomlilo kunye nokuxhathisa umlilo kwevalvu yebhola kufuneka kuqwalaselwe, ngakumbi kwicandelo lepetroliyam, leekhemikhali, le-metallurgical kunye namanye amasebe, kwiindawo ezinokutsha neziqhumayo. Ukuba iivalvu zebhola zisetyenziswa kwizixhobo kunye neenkqubo zemibhobho, kufuneka kuqwalaselwe ngakumbi ukumelana nomlilo kunye nokukhusela umlilo.
Iimpawu zevalvu yebhola
1. Inokumelana nokugeleza okuphantsi (ngokwenene akukho zero). 2. Ayizukubambeka xa isebenza ngaphandle kwe-lubricant, ngoko ke inokusetyenziswa ngokuthembekileyo kwi-corrosive media kunye ne-low boiling point liquids. 3. Ingafikelela kwi-100% sealant kuluhlu olukhulu loxinzelelo kunye nobushushu. 4. Ingenza ukuvulwa nokuvalwa okukhawulezayo kakhulu, kwaye ixesha lokuvulwa nokuvalwa kwezinye izakhiwo yi-0.05 ~ 0.1s kuphela, ukuqinisekisa ukuba ingasetyenziswa kwinkqubo yokwenza izinto ngokuzenzekelayo yebhentshi yovavanyo. Xa ivalve ivulwa kwaye ivalwa ngokukhawuleza, akukho shock isebenza. 5. Ukuvalwa okungqukuva kunokubekwa ngokuzenzekelayo kwindawo. 6. Indawo yokusebenza ivalwe ngokuthembekileyo kumacala omabini. 7. Xa ivuliwe ngokupheleleyo kwaye ivalwe ngokupheleleyo, iindawo zokuvalela zebhola kunye nesihlalo sevalve zahlulwe kwindawo, ngoko ke indawo edlula kwivalve ngesantya esiphezulu ayizukubangela ukukhukuliseka komphezulu wokuvalela. 8. Ngesakhiwo esincinci kunye nobunzima obulula, inokuthathwa njengesakhiwo sevalve esifanelekileyo esifanelekileyo kwinkqubo ephakathi yobushushu obuphantsi. 9. Umzimba wevalvu ulingana, ingakumbi xa isakhiwo somzimba wevalvu sidityanisiwe, esinokumelana kakuhle noxinzelelo oluvela kumbhobho. 10. Isiqwenga sokuvala sinokumelana nomahluko ophezulu woxinzelelo xa sivalwa. 11. Ivalvu yebhola enomzimba wevalvu odityanisiweyo ngokupheleleyo inokungcwatywa ngqo emhlabeni, ukuze izinto zangaphakathi zevalvu zingakhukuli, kwaye ubomi benkonzo obuphezulu bufikelele kwiminyaka engama-30. Yeyona valve ifanelekileyo kwimibhobho yeoyile negesi yendalo.
Ukusetyenziswa kwevalvu yebhola
Iimpawu ezininzi ezizodwa zeevalvu zebhola zimisela ukuba ukusetyenziswa kweevalvu zebhola kubanzi. Ngokwesiqhelo, xa kulungiswa iindawo ezimbini, ukusebenza okungqongqo kokutywina, udaka, ukuguguleka, ukuncitshiswa kweendlela, ukuvulwa nokuvalwa ngokukhawuleza (ukuvulwa nokuvalwa kwe-1/4), ukunqunyulwa koxinzelelo oluphezulu (iivalvu zebhola ziyacetyiswa kwiinkqubo zemibhobho enomahluko omkhulu woxinzelelo), ingxolo ephantsi, ukuxinana kwe-cavitation kunye negesi, ukuvuza okuncinci emoyeni, i-torque encinci yokusebenza, kunye nokumelana okuncinci kolwelo.
Ivalvu yebhola ikwafanelekile kwinkqubo yemibhobho yesakhiwo sokukhanya, ukunqunyulwa koxinzelelo oluphantsi (umahluko omncinci woxinzelelo) kunye nendawo erhabaxa. Iivalvu zebhola zingasetyenziswa nakwiinkqubo ze-cryogenic (cryogenic) kunye neenkqubo zemibhobho. Kwinkqubo yemibhobho yeoksijini kwishishini le-metallurgical, iivalvu zebhola eziye zanyangwa ngokungqongqo ukuze zisuswe amafutha ziyafuneka. Xa umgca ophambili kwipayipi yeoyile kunye nombhobho wegesi kufuneka ungcwatywe phantsi komhlaba, kufuneka kusetyenziswe ivalvu yebhola edibeneyo egcweleyo. Xa kufuneka ukulungiswa kokusebenza, kufuneka kukhethwe ivalvu yebhola enesakhiwo esikhethekileyo esinomgodi ofana no-V. Kwipetroliyam, i-petrochemical, ikhemikhali, amandla ombane, kunye nokwakhiwa kwedolophu, iivalvu zebhola zokutywina zesinyithi ukuya kwisinyithi zinokukhethwa kwiinkqubo zemibhobho ezinobushushu obusebenzayo obungaphezulu kwama-200 degrees.
Umgaqo wokusetyenziswa kwevalvu yebhola
Imigca ephambili yokuhambisa ioyile negesi yendalo, imibhobho ekufuneka icocwe, ize igqunywe phantsi komhlaba, khetha ivalvu yebhola enendlela yonke kunye nesakhiwo esidityanisiweyo; igqunywe emhlabeni, khetha ivalvu yebhola enendlela yonke okanye uqhagamshelo lweflange; umbhobho wesebe, khetha uqhagamshelo lweflange, uqhagamshelo oludityanisiweyo, ivalvu yebhola epheleleyo okanye encitshisiweyo. Imibhobho kunye nezixhobo zokugcina zeoyile ecociweyo zisebenzisa iivalvu zebhola ezijijekileyo. Kwipayipi yegesi yesixeko kunye negesi yendalo, ivalvu yebhola edadayo enoqhagamshelo lweflange kunye noqhagamshelo lwangaphakathi lomsonto iyakhethwa. Kwinkqubo yepayipi yeoksijini kwinkqubo yesinyithi, kuyacetyiswa ukusebenzisa ivalvu yebhola esisigxina eye yafumana unyango oluqinileyo lokususa amafutha kwaye igqunywe. Kwinkqubo yepayipi kunye nesixhobo sendawo yobushushu obuphantsi, ivalvu yebhola ebushushu obuphantsi enesiciko sevalvu kufuneka ikhethwe. Kwinkqubo yepayipi yeyunithi yokuqhekeka kwe-catalytic yeyunithi yokucocwa kweoyile, ivalvu yebhola yohlobo lwentonga yokuphakamisa inokukhethwa. Kwizixhobo kunye neenkqubo zemibhobho yemidiya erhabaxa efana ne-asidi kunye ne-alkali kwiinkqubo zeekhemikhali, zonke iivalvu zebhola zentsimbi engagqwali ezenziwe ngentsimbi engagqwali ye-austenitic kunye ne-PTFE njengeringi yokutywina isihlalo sevalvu kufuneka zikhethwe. Iivalvu zebhola zokutywina zentsimbi ukuya kwisinyithi zingasetyenziswa kwiinkqubo zemibhobho okanye izixhobo zobushushu obuphezulu kwiinkqubo ze-metallurgical, iinkqubo zamandla, izityalo ze-petrochemical, kunye neenkqubo zokufudumeza zasezidolophini. Xa kufuneka ukulungiswa kokuhamba kwamanzi, ivalvu yebhola elawulwa yi-worm gear, i-pneumatic okanye yombane evulekileyo ene-V-shaped inokukhethwa.
Isishwankathelo:Ukusetyenziswa kweevalvu zebhola kubanzi kakhulu, iintlobo ngeentlobo kunye nobungakanani bokusetyenziswa kusakhula, kwaye ziyaphuhliswa kwicala loxinzelelo oluphezulu, ubushushu obuphezulu, ububanzi obukhulu, ukusebenza okuphezulu kokuvala, ubomi obude, ukusebenza okuhle kohlengahlengiso kunye nemisebenzi emininzi yevalvu enye. Ukuthembeka kwayo kunye nezinye Izalathisi zokusebenza zifikelele kwinqanaba eliphezulu, kwaye zithathe indawo yeevalvu zesango, iivalvu zeglobe, kunye neevalvu ezilawulayo. Ngenkqubela phambili yobuchwephesha yeevalvu zebhola, iya kusetyenziswa kakhulu kwixesha elifutshane elibonakalayo, ngakumbi kwimibhobho yeoyile negesi, iicrackers ekucoceni ioyile nakwishishini lenyukliya. Ukongeza, iivalvu zebhola ziya kuba yenye yeentlobo zeevalvu eziphambili kwimimandla ye-caliber enkulu nephakathi, uxinzelelo oluphakathi noluphantsi kwamanye amashishini.
Ixesha lokuthumela: Epreli-01-2022