Intshayelelo kwiivalvu ezitywiniweyo

Bellow(s) Itywina(ed) iivalvu

Ukuvuza kwiindawo ezahlukeneyo kwimibhobho efunyenwe kwizityalo zekhemikhali kudala ukukhutshwa. Zonke ezo ndawo zokuvuza zinokubonwa kusetyenziswa iindlela ezahlukeneyo kunye nezixhobo kwaye kufuneka ziqatshelwe yinjineli yeplanti. Amanqaku okuvuza abalulekileyo aquka i-flanged gasket joints kunye ne-Valve / pump gland ukupakisha, njl. njl. Namhlanje ishishini lenkqubo yemichiza lizilungiselela iteknoloji ekhuselekileyo yokhuseleko olungcono lokusingqongileyo kwaye ibe luxanduva lwenkqubo yonke yobunjineli ukuyila izityalo ezinciphisa umonakalo kwindalo esingqongileyo uthintelo lokuvuza kwayo nayiphi na imichiza eyityhefu.

Ukuvuza kwidlala leValve okanye kwibhokisi yokuhlohlaidla ngokuba yinkxalabo yogcino okanye injineli yeplanti. Oku kuvuza kuthetha:
a) Ilahleko yezinto b) Ungcoliseko lomoya c) Kuyingozi kubasebenzi beplanti.

Umzekelo, thatha imeko yokuvuza komphunga nge-Valve gland. Kwi-150 PSI, ukucocwa kwe-0.001 kuphela nge-gland kuya kuthetha ukuvuza ngesantya se-25 lb / iyure. Oku kulingana nelahleko ye-USD 1.2 ngeshifu yeyure ezisibhozo, okanye i-USD 1,100 ngonyaka. Ngokufanayo, ukuthotywa okuncinci kwe-0.4 mm ubukhulu ngesekondi kukhokelela kwinkunkuma emalunga neelitha ezingama-200 ngonyaka ye-oyile enexabiso eliphezulu okanye isinyibilikisi. Oku kuvuza kunokuncitshiswa kakhulu ngokusebenzisa iValve yetywina elibellow. Eli nqaku ngoku liza kuqwalasela ukwakhiwa nokusebenza kwetywina elibhabhayo.

Ukwakhiwa kwangaphantsi

Ikhatriji ebhilo idityaniswe kuzo zombini iBonnet yeValve kunye nesiqu seValve. Ikhatriji emhlophe inenani lee-convolutions kwaye ezi convolutions ziye zixinzelelwe okanye zandiswe ngokuxhomekeke kwintshukumo yesikhondo seValve. (Ngokuthetha ngokwenzululwazi umbhobho uyacinezelwa xa iValve ikwindawo evulekileyo kwaye yandiswa xa iValve ikwimeko evaliweyo). Kubalulekile ukufaka ngokufanelekileyo imizimba yeValve. I-Bellow inokutywinwa kwiiValve ngeendlela ezimbini ezahlukeneyo. Okokuqala, umphantsi unokudityaniswa kwisiqu seValve phezulu kunye nomzimba weValve ezantsi. Kule meko inkqubo ulwelo equlethwe ngaphakathi bhova okanye indlela yesibini umbhobho welded ukuya kwisiqu Valve emazantsi kunye nomzimba phezulu. Kule meko ulwelo lwenkqubo luqulethwe kwingingqi ye-annular phakathi kweBonnet yeValve kunye ne-bellow (ukusuka ngaphandle).

Umbhobho licandelo elibalulekileyo kwaye lenza intliziyo yeeValve zetywina elibhobhozayo. Ukuthintela nakuphi na ukujijeka kwentsimbi, iValve kufuneka ibe nesiqu esinentshukumo yomgama kuphela. Oku kunokufezekiswa kusetyenziswa into ebizwa ngokuba yi-sleeve-nut kwinxalenye yeYoke yeBonethi yeValve. Ivili lesandla lifakelwe kwi-sleeve-nut ethi igqithise ngokufanelekileyo intshukumo ejikelezayo yesondo lesandla libe sisindululo somgca kwisiqu seValve.

Iintlobo ezingezantsi

Kukho iintlobo ezimbini eziphambili ze-Bellow: iBellow eyakhiwe kunye neBellow eWelded. Imivumbo eyenziweyo yenziwe ngokuqengqeleka kweshiti elisicaba (ifoyile eludongeni olucekethekileyo) ibe ityhubhu ethi emva koko idityaniswe ngobude. Le tyhubhu emva koko yenziwa ngoomatshini okanye i-hydrostatically ibe ngumbhobho ongqukuva kunye nezithuba ezibanzi. Uhlobo lwegqabi elidityanisiweyo lenziwe ngokudityaniswa kweepleyiti ezifana newasha yentsimbi ebhityileyo kunye kwisangqa sangaphakathi nangaphandle seewasha - njengamacwecwe. Igqabi eliphothiweyo linemigobe emininzi ngobude beyunithi nganye xa kuthelekiswa nemilobo efojiweyo. Ngoko ke, kubude obufanayo be-stroke, imivumbo ebunjiweyo iphinda-phindwe kabini ukuya kathathu ubude kunamahlakani awo adityanisiweyo.

Ngokwengxelo, imivumbo eyenziwe ngoomatshini ayisebenzi kwindawo ethile, ngelixa igqabi elidityanisiweyo lidla ngokusilela kwi-weld okanye kufutshane nayo. Ukuqinisekisa ukungena ngokupheleleyo kweziphelo ezithambileyo kunye nokuphela kwe-coller welding kuyacetyiswa ukuba kwenziwe usebenzisa i-micro plasma welding.

Uyilo oluphantsi

Idizayini ye-bellow emininzi ikhethwa ukuphatha ulwelo oluphezulu loxinzelelo (ngokuqhelekileyo iiplies ezimbini okanye ezintathu zodonga lwentsimbi). I-ply bellow emibini inokunyusa izinga loxinzelelo nge-80% ukuya kwi-100% xa kuthelekiswa ne-ply ply enye yobukhulu obufanayo. Kungenjalo, ukuba i-ply bellow enye yobunzima obulingana noxinzelelo lwe-ply bellow esetyenziswayo, ubude be-stroke buyancipha. Ke ngoko, uyilo oluneentsimbi ezininzi lubonelela ngenzuzo eyahlukileyo ngaphezulu kwentsimbi enye. Kucacile ukuba i-bellow iphantsi kokukhathala kwesinyithi kwaye oku kukhathala kunokubangela ukusilela kwe-weld. Ubomi bokudinwa buchatshazelwa zizinto zokwakha, ubuchule bokwenza, ubude be-stroke kunye ne-stroke frequency, ukongeza kwiiparamitha eziqhelekileyo ezifana nobushushu bolwelo kunye noxinzelelo.

Izinto ezingezantsi

Eyona nto idumileyo yentsimbi emdaka yi-AISI 316Ti equlathe i-Titanium ukumelana nobushushu obuphezulu. Kungenjalo, i-Inconel 600 okanye i-Inconel 625 iphucula amandla okudinwa kunye nokumelana nokugqwala xa kuthelekiswa nentsimbi engenasici. Ngokufanayo, i-Hastalloy C-276 inikeza ukuxhathisa okukhulu kwe-corrosion kunye namandla okukhathala kune-Inconel 625. Ukuxhatshazwa kokukhathala kunokuphuculwa ngokusebenzisa inkqubo yokuphindaphinda i-bellows kunye nokunciphisa ubude be-stroke; oku kunokunyusa kakhulu ubomi benkonzo obuphantsi.

Iinketho zevalvu

Iindidi zeValve eziqhelekileyo ukuba zifakelwe izitywina ezimhlophe ziyisango kunye noyilo lweglowubhu (jonga uMfanekiso 1) .Ezi zifaneleke kakhulu ukusetyenziswa kunye neemvungu ngenxa yokwakhiwa kwazo kwangaphakathi kunye nokuhamba kwe-axial ye-Valve stem.
Ngokusekwe kulwazi olukhoyo, kubonakala ngathi iiValve zetywina zangoku zihamba ngobukhulu ukusuka kwi-3 mm NB ukuya kwi-650 mm NB. Iireyithingi zoxinzelelo ziyafumaneka ukusuka kwi-ANSI 150 # ukuya ku-2500 #. Izinketho zezinto eziphathekayo kwiiValve ziquka i-carbon steel, insimbi engenasici kunye ne-alloys exotic.

Usetyenziso

Imidiya yokuTshintshela ubushushu: ioli eshushu isetyenziswa ngokuqhelekileyo kumashishini afana neentsinga zokwenziwa / i-POY (I-Partially Oriented Yarn). Nangona kunjalo, kuhlala kukho umngcipheko womlilo ngenxa yokuchitheka kweoli eshushu kwiikhemikhali ezinokutsha kakhulu. Apha, iiValve zetywina ezibellow zinokukumisa ukuvuza.

Vacuum / vacuum ephezulu kakhulu: ezinye iinkqubo zifuna impompo yokufunxa ukuba iqhube ukukhupha umoya kumbhobho. Naziphi na iiValufa eziqhelekileyo ezifakelweyo kumbhobho zinokuvumela umoya wangaphandle ukuba ungene kumbhobho ngokucokisekileyo kwibhokisi yokuhlohla iValve. Yiyo loo nto iValve yetywina evuthululweyo sesona sisombululo sokuthintela umoya ukuba ungadluleli kwibhokisi yokuhlohla.
Ulwelo oluyingozi kakhulu: kumajelo eendaba afana neklorini (jonga uMfanekiso 2), i-hydrogen, i-ammonia kunye ne-phosgene, iValve yetywina elibhobhozayo luyilo olufanelekileyo njengoko ukuvuza ngedlala kususwa ngokupheleleyo.
Iplanti yeNyukliya, iplanti yamanzi anzima: kwiimeko apho ukuvuza kwemitha kufuneka kuthintelwe ngawo onke amaxesha, iValve yesivalo esivuthelweyo lolona khetho lubalaseleyo.
Ulwelo olunexabiso eliphezulu: kwezinye izicelo ukuvuza kufuneka kuphetshwe ngenxa yexabiso eliphezulu lolwelo. Apha, uvavanyo lwezoqoqosho luhlala luthanda ukusetyenziswa kweeValve ze-bellow seal.
Imigangatho yokusingqongileyo: kwihlabathi jikelele, imigangatho emalunga nezinto ezikhutshwayo kunye nokusingqongileyo iya iba ngqongqo ngakumbi imihla ngemihla. Kunokuba nzima ke ukuba iinkampani zandise phakathi kwezakhiwo ezikhoyo. Ngokusetyenziswa kweeValve ze-bellow seal, ukwandiswa ngaphandle kokusingqongileyo okongeziweyo
umonakalo kunokwenzeka.