Iivalvu zebholazinezakhiwo ezininzi, kodwa ngokusisiseko ziyafana. Iindawo zokuvula nezokuvala zii-cores ezingqukuva ezijikelezileyo, eziquka ikakhulu izihlalo zevalvu, iibhola, iiringi zokuvala, iziqu zevalvu kunye nezinye izixhobo zokusebenza. Isiqu sevalvu sijikeleza ngama-90 degrees ukuze sifikelele ekuvulekeni nasekuvalekeni kweevalvu. Iivalvu zebhola zisetyenziswa kwimibhobho ukuvala, ukusasaza, ukulawula ukuhamba kunye nokutshintsha indlela yokuhamba kwe-medium. Isihlalo sevalvu sisebenzisa iindlela ezahlukeneyo zokuvala isihlalo ngokweemeko ezahlukeneyo zokusebenza. Umzimba wevalvu yebhola yohlobo lwe-O uxhotyiswe ngebhola enomngxuma ophakathi olingana nobubanzi bepayipi. Ibhola ingajikeleza kwisihlalo sokuvala. Kukho iringi ye-annular elastic kumacala omabini kwicala lepayipi. Ivalvu yebhola yohlobo lwe-V inesakhiwo esimile okwe-V. Ingundoqo yevalvu yi-1/4 yegobolondo eliyi-spherical ene-notch efana ne-V. Inamandla amakhulu okuhamba, uluhlu olukhulu oluhlengahlengiswayo, amandla okucheba, kwaye ingavalwa kakuhle. Ifanelekile ngakumbi kwiimeko zolwelo apho izinto zine-fibrous.
1. Ulwakhiwo lwevalvu yebhola yohlobo lwe-O:
Ivalvu yebhola yohlobo lwe-O ilawula indlela ephakathi ngokujikeleza ibhola nge-y ukuya kwi-90°, ngenxa yoko, umngxuma odlulayo ungatshintshwa, ngaloo ndlela kufezekiswa ukuvulwa nokuvalwa kwevalvu yebhola. Ivalvu yebhola yohlobo lwe-O isebenzisa uyilo oludadayo okanye oluzinzileyo. Iindawo ezihambayo zenziwe ngezinto ezizithambisayo ezinomlinganiselo omncinci kakhulu wokungqubana, ngoko ke i-torque yokusebenza incinci. Ukongeza, ukutywinwa kwexesha elide kwegrisi yokutywina kwenza umsebenzi ube lula ngakumbi. Iingenelo zemveliso yayo zezi zilandelayo:
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Ivalvu yebhola yohlobo lwe-O inokumelana okuncinci kolwelo
Iivalvu zebhola ngokubanzi zinezakhiwo ezimbini: ububanzi obupheleleyo kunye nobubanzi obuncitshisiweyo. Nokuba yeyiphi na isakhiwo, i-coefficient yokumelana nokuhamba kwevalvu yebhola incinci. Iivalvu zebhola eziqhelekileyo zithe tye, ezaziwa ngokuba ziivalvu zebhola ezigcweleyo. Ububanzi betshaneli bulingana nobubanzi bangaphakathi bepayipi, kwaye ilahleko yokumelana kukumelana kokungqubana kuphela kobude obufanayo bepayipi. Le valve yebhola inokumelana okuncinci kolwelo kuzo zonke iivalvu. Kukho iindlela ezimbini zokunciphisa ukumelana kwenkqubo yepayipi: enye kukunciphisa izinga lokuhamba kolwelo ngokunyusa ububanzi bepayipi kunye nobubanzi bevalvu, okuya kunyusa kakhulu iindleko zenkqubo yepayipi. Eyesibini kukunciphisa ukumelana kwendawo yevalvu, kwaye iivalvu zebhola zezona zilungileyo.
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Ivalvu yebhola yohlobo lwe-O itshintsha ngokukhawuleza nangokulula
Ivalvu yebhola kufuneka ijikeleze iidigri ezingama-90 kuphela ukuze ivuleke ngokupheleleyo okanye ivalwe ngokupheleleyo, ukuze ivulwe kwaye ivalwe ngokukhawuleza.
- Ivalvu yebhola yohlobo lwe-O inamandla okuvala kakuhle
Uninzi lwezihlalo zeevalvu zebhola zenziwe ngezinto ezithambileyo ezifana ne-PTFE, ezidla ngokubizwa ngokuba ziivalvu zebhola ezithambileyo. Iivalvu zebhola ezithambileyo zisebenza kakuhle ekutywineni kwaye azifuni uburhabaxa obuphezulu kunye nokuchaneka kokucubungula komphezulu wokutywina iivalvu.
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Ivalvu yebhola yohlobo lwe-O inobomi obude benkonzo
Ngenxa yokuba i-PTFE/F4 ineempawu ezilungileyo zokuzithambisa, i-coefficient yokungqubana ne-sphere incinci. Ngenxa yeteknoloji yokucubungula ephuculweyo, uburhabaxa bebhola buyancitshiswa, ngaloo ndlela kwandisa kakhulu ubomi benkonzo yevalvu yebhola.
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Ivalvu yebhola yohlobo lwe-O inokuthembeka okuphezulu
Isibini sokutywina sebhola kunye nesihlalo sevalvu aziyi kuba neengxaki zokukrweleka, ukuguguleka ngokukhawuleza kunye nezinye iimpazamo;
Emva kokuba isiqu sevalvu sitshintshiwe sibe luhlobo olwakhelwe ngaphakathi, ingozi yokuba isiqu sevalvu sinokuphuma ngenxa yokukhululeka kwe-packing gland phantsi kwesenzo soxinzelelo lolwelo olususiweyo;
Iivalvu zebhola ezinezakhiwo ezichasene nokungashukumi kunye nezimelana nomlilo zingasetyenziswa kwimibhobho ethutha ioyile, igesi yendalo kunye negesi yamalahle.
Isiseko sevalvu (ibhola) sevalvu yebhola yohlobo lwe-O singqukuva. Ngokwembono yesakhiwo, isihlalo sebhola sifakwe kwisihlalo ecaleni komzimba wevalvu xa sitywinwa. Iindawo ezihambayo zenziwe ngezinto ezizithambisa ngokwazo ezinomlinganiselo omncinci kakhulu wokungqubana, ngoko ke i-torque yokusebenza incinci. Ukongeza, ukutywinwa kwexesha elide kwegrisi yokutywinwa kwenza umsebenzi ube lula ngakumbi. Ngokuqhelekileyo isetyenziselwa ukulungiswa kwezikhundla ezimbini, iimpawu zokuhamba ziyavuleka ngokukhawuleza.
Xa ivalvu yebhola yohlobo lwe-O ivuliwe ngokupheleleyo, omabini amacala awathintelwa, enza umjelo othe tye one-two-way sealing. Isebenza kakuhle "ngokuzicoca" kwaye ifanelekile kwizihlandlo zokusikwa kweendawo ezimbini ze-media engcolileyo nequlethe ifayibha. I-ball core isoloko idala ukungqubana ne-valve ngexesha lenkqubo yokuvula nokuvala i-valve. Kwangaxeshanye, ukutywinwa phakathi kwe-valve core kunye ne-valve seat kwenziwa ngamandla okuqinisa okutywinwa kwe-valve seat ecinezela kwi-ball core. Nangona kunjalo, ngenxa ye-soft seat valve sealing, iipropati ezibalaseleyo zoomatshini nezomzimba zenza ukusebenza kwayo kokutywinwa kube kuhle kakhulu.
2.Ulwakhiwo lwevalvu yebhola emile okwe-V:
Umongo webhola wevalvu yebhola enomfanekiso we-V unesakhiwo esibunjwe nge-V. Umongo wevalvu yiqokobhe eliyi-1/4 eliyi-spherical eline-notch enomfanekiso we-V. Inamandla amakhulu okuhamba, uluhlu olukhulu oluhlengahlengiswayo, amandla okucheba, kwaye ingavalwa kakuhle. Ifanelekile ngokukodwa kulwelo. Iimeko apho izinto zinee-fibrous. Ngokubanzi, iivalvu zebhola ezinomfanekiso we-V ziivalvu zebhola ezinesivalo esinye. Azifanelekanga ukusetyenziswa ngeendlela ezimbini.
Kukho iintlobo ezine ze-notch ezimile okwe-V, iidigri ezili-15, iidigri ezingama-30, iidigri ezingama-60, iidigri ezingama-90.
Umphetho omile okwe-V unqumla ukungcola. Ngexesha lokujikeleza kwebhola, umphetho obukhali wemela yebhola omile okwe-V uthambekele kwisihlalo sevalvu, ngaloo ndlela usika imicu kunye nezinto eziqinileyo kulwelo. Nangona kunjalo, iivalvu zebhola eziqhelekileyo azinalo olu sebenzi, ngoko ke kulula ukubangela ukungcola kwefayibha kubambeke xa uvala, okubangela iingxaki zokugcinwa nokulungiswa. Ukugcinwa kuyingxaki enkulu. Umongo wevalvu wevalvu yebhola emile okwe-V awuyi kubambeka yimicu. Ukongeza, ngenxa yoqhagamshelo lweflange, kulula ukuyiqhekeza nokuhlanganisa ngaphandle kwezixhobo ezikhethekileyo, kwaye ukugcinwa kulula. xa ivalvu ivaliwe. Kukho isiphumo sesikere esimile okwe-wedge phakathi kwenotshi enomfanekiso we-V kunye nesihlalo sevalvu, esinganeli nje ngokuba nomsebenzi wokuzicoca kodwa sikwathintela umongo webhola ukuba ubambeke. Umzimba wevalvu, isigqubuthelo sevalvu kunye nesihlalo sevalvu sisebenzisa izakhiwo zentsimbi ezikhomba kwindawo nganye, kwaye kusetyenziswa i-coefficient encinci yokungqubana. Isiqu sevalvu silayishwe ngentwasahlobo, ngoko ke i-torque yokusebenza incinci kwaye izinzile kakhulu.
Ivalvu yebhola enomfanekiso we-V sisakhiwo esijikelezayo se-engile yasekunene esinokufezekisa ukulawulwa kokuhamba. Singafezekisa amanqanaba ahlukeneyo omlinganiselo ngokwe-engile enomfanekiso we-V yebhola enomfanekiso we-V. Ivalvu yebhola enomfanekiso we-V isetyenziswa ngokubanzi kunye nee-actuators zevalvu kunye nee-positioners ukuze kufezekiswe uhlengahlengiso olulinganayo. , Isiseko sevalvu enomfanekiso we-V sifanelekile kakhulu kwiimeko ezahlukeneyo zohlengahlengiso. Sine-flow coefficient enkulu elinganisiweyo, umlinganiselo omkhulu ohlengahlengiswayo, isiphumo esihle sokutywina, akukho mvakalelo ekusebenzeni kohlengahlengiso, sincinci, kwaye sinokufakwa ngokuthe nkqo okanye ngokuthe tye. Sifanelekile ukulawula igesi, umphunga, ulwelo kunye nezinye izinto. Ivalvu yebhola enomfanekiso we-V sisakhiwo esijikelezayo se-engile yasekunene, esenziwe ngumzimba wevalvu enomfanekiso we-V, i-pneumatic actuator, i-positioner kunye nezinye izixhobo; sinophawu lokuhamba oluhambelanayo olumalunga nomlinganiselo olinganayo; samkela isakhiwo esineentsimbi ezimbini, sine-torque encinci yokuqala, kwaye sinovakalelo oluhle kunye nesantya sokuva, amandla okucheba aphezulu.