Makhe sazise ukuba yintoni umahluko phakathi kwevalvu yeglobe kunye nevalvuivalvu yesango.
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Ulwakhiwo
Xa indawo yokufaka incinci, qaphela ukhetho:
Iivalvu yesangoinokuxhomekeka kuxinzelelo oluphakathi ukuze ivale ngokuqinileyo umphezulu wokuvala, ukuze kufezekiswe isiphumo sokungavuzi. Xa ivulwa kwaye ivalwa, umongo wevalvu kunye nomphezulu wokuvala wesihlalo sevalvu zihlala zinxibelelana kwaye zikhuhlana, ngoko ke umphezulu wokuvala kulula ukuwunxiba, kwaye xaivalvu yesangoxa sele isondele ekuvalekeni, umahluko woxinzelelo phakathi komphambili nomva wombhobho mkhulu kakhulu, nto leyo eyenza ukuba umphezulu wokuvala ubole kakhulu.
Ulwakhiwo lweivalvu yesangoiya kuba nzima ngakumbi kunevalvu yeglobhu, ngokwembono yembonakalo, kwimeko ye-caliber efanayo, ivalvu yesango iphezulu kunevalvu yeglobhu, kwaye ivalvu yeglobhu inde kuneivalvu yesangoUkongeza,ivalvu yesangoyahlulwe yaba yinduku ekhanyayo kunye nenduku emnyama. Iivalvu ezivaliweyo azenzi njalo.
Ingaba isebenza kanjani
Xa ivalvu yeglobe ivuliwe kwaye ivaliwe, iba yisiqu esiphakamayo, oko kukuthi, xa ivili lesandla lijikeleziswa, ivili lesandla liya kujikeleza lize liphakame kunye nesiqu.ivalvu yesangokukujikeleza ivili lesandla ukuze isiqu sevalvu senze intshukumo yokuphakamisa, kwaye indawo yevili lesandla ngokwayo ayitshintshi.
Amanqanaba okuhamba kwamanzi ayahluka,iivalvu zesangoifuna ukuvulwa ngokupheleleyo okanye ukuvalwa ngokupheleleyo, ngelixa iivalvu zeglobe zingafuni. Ivalvu yeglobe inecala elithile lokungena kunye nelokuphuma, kwayeivalvu yesangoayinazo iimfuno zokungena kunye nesikhokelo sokuphuma.
Ukongeza,ivalvu yesangoinezimo ezimbini kuphela: ivuliwe ngokupheleleyo okanye ivaliwe ngokupheleleyo, kwaye ukutsiba kokuvula nokuvala kwepleyiti yesango kukhulu kakhulu, kwaye ixesha lokuvula nokuvala lide. Ukutsiba kokunyakaza kwepleyiti yevalvu yevalvu yeglobhu kuncinci kakhulu, kwaye ipleyiti yevalvu yeglobhu inokuma kwindawo ethile ishukuma ukuze kulungiswe ukuhamba kwamanzi.ivalvu yesangoingasetyenziselwa kuphela ukunqunyulwa kwaye ayinayo eminye imisebenzi.
Umahluko ekusebenzeni
Ivalvu yeglobe ingasetyenziselwa zombini ukucima kunye nokulawula ukuhamba kwamanzi. Ukumelana kolwelo lwevalvu yeglobe kukhulu kakhulu, kwaye kunzima ukuyivula nokuvala, kodwa ngenxa yokuba umgama phakathi kwepleyiti yevalvu kunye nomphezulu wokutywina umfutshane, indlela yokuvula nokuvala imfutshane.
Ngenxa yokubaivalvu yesangoinokuvulwa kwaye ivalwe ngokupheleleyo kuphela, xa ivuliwe ngokupheleleyo, ukumelana nokuhamba okuphakathi kwitshaneli yomzimba wevalvu kuphantse kube yi-0, ngoko ke ukuvulwa nokuvalwa kweivalvu yesangokuya konga kakhulu abasebenzi, kodwa ipleyiti yesango ikude kakhulu nomphezulu wokuvala, kwaye ixesha lokuvula nokuvala lide.
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Ukufakwa kunye nesikhokelo sokuhamba
Isiphumo seivalvu yesangoIndlela yokuhamba kwamanzi kuzo zombini iindlela iyafana, akukho mfuneko yendlela yokungena kunye neyokuphuma kokufakwa, kwaye i-medium ingahamba kuzo zombini iindlela. I-globe valve kufuneka ifakwe ngokuhambelana ngqo necala eliphawulwe lutolo lomzimba we-valve, kwaye kukho ilungiselelo elicacileyo kwicala lokungena kunye nelokuphuma kwe-globe valve, kwaye indlela yokuhamba kwamanzi ye-globe valve yamkelwe ukusuka phezulu ukuya ezantsi ngokwe "utshintsho oluthathu" lwe-valve yaseTshayina.
Ivalvu yokuvala iphantsi ngaphakathi nangaphandle, kwaye ngaphandle kukho umbhobho ocacileyo ongekho kwinqanaba lesigaba esinye.ivalvu yesangoindlela yokuhamba kwamanzi ikumgca othe tye.ivalvu yesangoinkulu kunevalvu yeglobe.
Ngokwembono yokumelana nokuhamba kwamanzi, xa ivuliwe ngokupheleleyo, ukumelana nokuhamba kwamanzi kwevalvu yesango kuncinci, kwaye ukumelana nokuhamba kwamanzi kwevalvu yokumisa umthwalo kukhulu. I-coefficient yokumelana nokuhamba kwamanzi eqhelekileyoivalvu yesangoimalunga ne-0.08~0.12, amandla okuvula nokuvala mancinci, kwaye i-medium ingahamba ngeendlela ezimbini. Ukumelana nokuhamba kweevalvu zeglobe eziqhelekileyo kuphindwe ka-3-5 kunokoiivalvu zesango.Ukuvulwa nokuvalwa kufuneka kunyanzeleke ukuba kuvalwe ukuze kufunyanwe ukutywinwa, i-spool ye-globe valve ivaliwe ngokupheleleyo xa idibana nomphezulu wokutywinwa, ngoko ke ukuguguleka komphezulu wokutywinwa kuncinci kakhulu, ngenxa yokuhamba okukhulu kwamandla amakhulu okongeza i-actuator ye-globe valve kufuneka iqwalasele uhlengahlengiso lwendlela yokulawula i-torque.
Kukho iindlela ezimbini zokufaka ivalvu yeglobe, enye kukuba i-medium ingangena phantsi kwe-spool, inzuzo kukuba ukupakisha akuxinzelelwanga xa ivalvu ivaliwe, nto leyo enokwandisa ubomi benkonzo yokupakisha, kwaye inokutshintsha ukupakisha xa umbhobho ophambi kwevalvu uphantsi koxinzelelo; Ingxaki kukuba i-torque eqhubayo yevalvu inkulu, ephantse ibe yi-1 ngokuphindwe kaninzi kune-flow ephezulu, amandla e-axial esiqu sevalvu makhulu, kwaye isiqu sevalvu kulula ukusigoba.
Ngoko ke, le ndlela iqheleke ukuba ifaneleke kuphela kwiivalvu zeglobe ezincinci (DN50 okanye ngaphantsi), kwaye iivalvu zeglobe ezingaphezulu kweDN200 zisebenzisa i-medium ephuma phezulu. (Iivalvu zeglobe zombane zihlala zisebenzisa i-medium ukungena ukusuka phezulu.) Ingxaki yendlela yokungena yemidiya evela phezulu ichasene ngqo nendlela yokungena esezantsi.
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Ukutywina
Umphezulu wokutywina wevalvu yeglobe licala elincinci letrapezoidal lesiseko sevalvu (jonga ngokukodwa imilo yesiseko sevalvu), xa isiseko sevalvu siwile, silingana nokuvalwa kwevalvu (ukuba umahluko woxinzelelo mkhulu, ewe, ukuvalwa akungqongqo, kodwa isiphumo sokujonga asibi sibi),ivalvu yesangoivalwe ecaleni kwepleyiti yesango le-valve core, isiphumo sokuvalwa asilunganga njenge-globe valve, kwaye i-valve core ayiyi kuwa njenge-globe valve elingana nokuvalwa kwe-valve.
Ixesha lokuthumela: Epreli-08-2023
