Okwangoku, iivalvu yebhabhathaneyinxalenye esetyenziselwa ukulawula ukuvulwa kunye nokuhamba kwamanzi kwenkqubo yemibhobho.
Isetyenziswe kakhulu kwiindawo ezininzi ezifana nepetroleum, imboni yeekhemikhali, i-metallurgy, amandla ombane ngamanzi njalo njalo. Kwiteknoloji eyaziwayo ye-butterfly valve, indlela yayo yokutywina isebenzisa kakhulu isakhiwo sokutywina,
Izinto zokutywina zerabha, i-polytetraoxyethylene, njl. Ngenxa yokunqongophala kweempawu zesakhiwo, ayifanelekanga kumashishini afana nokumelana nobushushu obuphezulu, ukumelana noxinzelelo oluphezulu, ukumelana nokugqwala, kunye nokumelana nokuguguleka.
Ivalvu yebhabhathane ekhoyo ephucukileyo yivalvu yebhabhathane yentsimbi ephindwe kathathu evalekileyo. Umzimba obanzi kunye nesihlalo sevalvu zizinto ezidityanisiweyo, kwaye umaleko womphezulu wokutywina wesihlalo sevalvu udityaniswe ngezinto ze-alloy ezimelana nobushushu kunye nokugqwala.
Indandatho yokutywina ethambileyo ene-laminated enezingqi ezininzi inamathele kwipleyiti yevalvu. Xa ithelekiswa nevalvu yebhabhathane yendabuko, olu hlobo lwevalvu yebhabhathane lunokumelana nobushushu obuphezulu, kulula ukuyisebenzisa, kwaye alunangqubano xa luvulwa naxa luvalwa. Xa luvalwa, i-torque yendlela yokudlulisa iyanda ukuze ihlawulele ukutywinwa.
Ukuphucula ukusebenza kokutywina kwevalvu yebhabhathane kunye neenzuzo zokwandisa ubomi benkonzo.
Nangona kunjalo, le valve yebhabhathane isenazo ezi ngxaki zilandelayo ngexesha lokusetyenziswa kwayo.
Ekubeni iringi yokutywina ethambileyo neqinileyo enezingqimba ezininzi inamathele kwipleyiti ebanzi, xa ipleyiti yevalvu ivulwa rhoqo, i-medium iya kwenza ukukrwela okuhle kumphezulu wayo wokutywina, kwaye ibhendi yokutywina ethambileyo kwisandwich yeshiti yesinyithi iya kuchaphazela ngokuthe ngqo ukusebenza kokutywina emva kokukrwela.
Ngenxa yeemeko zesakhiwo, esi sakhiwo asifanelekanga kwiivalvu ezinobubanzi obungaphantsi kwe-DN200, kuba isakhiwo siphela sepleyiti yevalvu sikhulu kakhulu kwaye ukumelana nokuhamba kwamanzi kukhulu.
Ngenxa yomgaqo wesakhiwo esingaqhelekanga kathathu, isitywino phakathi komphezulu wokutywina wepleyiti yevalvu kunye nesihlalo sevalvu sixhomekeke kwi-torque yesixhobo sokudlulisa ukuze sicinezele ipleyiti ebanzi kwisihlalo sevalvu. Kwimeko yokuhamba kakuhle, kokukhona uxinzelelo oluphakathi luphezulu, kokukhona i-extrusion yokutywina iqina.
Xa i-flow channel medium ibuyela umva, njengoko uxinzelelo oluphakathi lusanda, uxinzelelo oluphakathi kwepleyiti yevalvu kunye nesihlalo sevalvu lungaphantsi koxinzelelo oluphakathi, isitywina siqala ukuvuza.
Ivalvu yebhabhathane eqinileyo eneendlela ezintathu esebenza kakhulu ibonakaliswa kukuba iringi yokutywina yesihlalo esibanzi yenziwe ngamaleko amaninzi eeshiti zentsimbi engagqwaliyo kumacala omabini eringi yokutywina ethambileyo enomfanekiso ka-T. Umphezulu wokutywina weslab kunye nesihlalo sevalvu sisakhiwo sekhowuni esingqindilili,
Umphezulu wekhowuni engqindilili yepleyiti yevalvu udityaniswe ngezinto ze-alloy ezimelana nobushushu kunye nokugqwala; intwasahlobo eqiniswe phakathi kwepleyiti yoxinzelelo yeringi yokulungisa kunye nebholiti yokulungisa yepleyiti yoxinzelelo idityanisiwe.
Olu lwakhiwo luyilungisa ngokufanelekileyo indawo yokunyamezelana phakathi kwesingxobo seshaft kunye nomzimba wevalvu kunye nokuguquguquka kwe-elastic kwentonga ebanzi phantsi koxinzelelo oluphakathi, kwaye lusombulula ingxaki yokutywina kwevalvu kwinkqubo yokuhambisa i-medium eguquguqukayo eneendlela ezimbini.
Indandatho yokutywina yenziwe ngeshiti yentsimbi engenasici ethambileyo enomfanekiso we-T emacaleni omabini, enezibonelelo ezimbini zesitywina esiqinileyo sesinyithi kunye nesitywina esithambileyo, kwaye ayinakuvuza nokuba ubushushu buphantsi okanye buphezulu.
Uvavanyo lubonisa ukuba xa ichibi likwimeko yokugeleza okuhle (icala lokugeleza kwesixhobo lifana necala lokujikeleza kwepleyiti yebhabhathane), uxinzelelo kumphezulu wokutywina lwenziwa yi-torque yesixhobo sokudlulisa kunye nesenzo soxinzelelo oluphakathi kwipleyiti yevalvu.
Xa uxinzelelo oluphakathi lusanda, kokukhona umphezulu wekhoni e-oblique wepleyiti yevalvu kunye nomphezulu wokutywina wesihlalo sevalvu zicinezelwa, kokukhona isiphumo sokutywina singcono. Kwimeko yokuhamba okungasemva, ukutywina phakathi kwepleyiti yevalvu kunye nesihlalo sevalvu kuxhomekeke kwi-torque yesixhobo sokuqhuba ukuze kucinezelwe ipleyiti yevalvu kwisihlalo sevalvu.
Xa uxinzelelo oluphakathi lunyuka, xa uxinzelelo oluphakathi phakathi kwepleyiti yevalvu kunye nesihlalo sevalvu lungaphantsi koxinzelelo oluphakathi,
Amandla okuguqulwa agciniweyo entwasahlobo yeringi yokulungisa emva kokuba ilayishiwe anokubuyisela uxinzelelo oluqinileyo lomphezulu wokutywina wepleyiti yevalvu kunye nesihlalo sevalvu ukuze kuhlawulelwe ngokuzenzekelayo.
Ngoko ke, ngokungafaniyo nobugcisa bangaphambili, imodeli yokusetyenziswa ayifaki iringi yokutywina eqinileyo enamaleko amaninzi kwipleyiti yevalvu, kodwa iyifakela ngqo emzimbeni wevalvu. Ukongezwa kweringi yokulungelelanisa phakathi kwepleyiti yoxinzelelo kunye nesihlalo sevalvu yindlela efanelekileyo kakhulu yokutywina enzima eneendlela ezimbini.
Ingathatha indawo yeevalvu zesango, iivalvu zeglobhu kunye neevalvu zeglobhu.