Ivalve yokumisa isetyenziswa ikakhulu ukulawula nokumisa ulwelo oluhamba kumbhobho. Bahluke kwiivalvu ezifanaiivalve zebholakunye neevalvu zesango kuba ziyilelwe ngokukodwa ukulawula ukuhamba kwamanzi kwaye azikhawulelwanga kwiinkonzo zokuvala. Isizathu sokuba ivalve yokumisa ibizwe ngolu hlobo kukuba uyilo oludala lubonisa umzimba othile ongqukuva kwaye unokwahlulwa ube ziihemispheres ezimbini, zahlulwe yiikhweyitha, apho ukuqukuqela kutshintsha indlela. Ezona zakhi zangaphakathi zesitulo sokuvala ziqhele ukuba zingqukuva (umz., iivalvu zebhola) kodwa ziqhelekile ukuba zicwangciswe, zibe ne-hemispherical, okanye zimilise iplagi. Iivalvu zeglowubhu zinqanda ukuhamba kolwelo ngakumbi xa zivulekile kunesango okanye iivalvu zebhola, okukhokelela kuxinzelelo oluphezulu lokuhla kuzo. Iivalvu zeglowubhu zinezimo ezintathu eziphambili zomzimba, ezinye zazo zisetyenziselwa ukunciphisa ukuhla koxinzelelo ngevalve. Ngolwazi ngezinye iivalvu, nceda ujonge kwiSikhokelo somthengi wevalvu yethu.

Uyilo lwevalvu

Ivalve yokumisa yenziwe ngamalungu amathathu aphambili: umzimba wevalvu kunye nesihlalo, idiski yevalvu kunye nesiqu, ukupakisha kunye nebhonethi. Xa usebenza, jikelezisa isiqu esinemisonto ngevili lesandla okanye ivalve actuator ukuphakamisa idiski yevalvu ukusuka kwisitulo sevalve. Indlela yolwelo kwivalve inendlela emile okwe-Z ukuze ulwelo lukwazi ukuqhagamshelana nentloko yediski yevalvu. Oku kwahlukile kwiivalvu zesango apho ulwelo luxhomekeke kwisango. Olu lungelelwaniso ngamanye amaxesha luchazwa njengomzimba wevalve omilise u-Z okanye ivalve eyi-T. I-inlet kunye ne-outlet ihambelana enye kwenye.

Olunye ulungelelwaniso lubandakanya iiengile kunye neepateni ezimilise uY. Kwi-valve yokumisa i-angle, i-outlet yi-90 ° ukusuka kwi-inlet, kwaye ulwelo luhamba ngendlela e-L. Kwi-valve ye-Y-shaped okanye i-Y-shaped body configuration, i-valve stem ingena kumzimba we-valve kwi-45 °, ngelixa i-inlet kunye ne-outlet ihlala emgceni, kufana nendlela yeendlela ezintathu. Ukuchasana kwepateni ye-angular ukuhamba kuncinci kunendlela ye-T-shaped pattern, kunye nokuchasana kwe-Y-shaped pattern encinci. Iivalvu zendlela ezintathu zezona zixhaphakileyo kwezi ntlobo zintathu.

Idiskhi yokutywina idla ngokudityaniswa ukuze ilingane nesihlalo sevalve, kodwa idiski ecaba nayo ingasetyenziswa. Xa i-valve ivuliwe kancinci, ulwelo luhamba ngokulinganayo malunga ne-disc, kunye nokusabalalisa ukunxiba kwisihlalo sevalve kunye nediski. Ngoko ke, i-valve isebenza ngokufanelekileyo xa ukuhamba kuyancipha. Ngokuqhelekileyo, indlela yokuhamba isiya kwicala le-valve stem yevalve, kodwa kwindawo yobushushu obuphezulu (umphunga), xa umzimba wevalvu uphola kwaye ubhamba, ukuhamba kudla ngokubuyela umva ukugcina idiski yevalve itywinwe ngokuqinileyo. I-valve inokulungelelanisa ulwalathiso lokuhamba ukusebenzisa uxinzelelo lokunceda ukuvala (ukuhamba ngaphezu kwediski) okanye uvule (ukuhamba ngaphantsi kwediski), ngaloo ndlela ivumela i-valve ukuba ingaphumeleli ukuvala okanye ukungaphumeleli evulekile.

I-disc yokutywina okanye iplagi idla ngokukhokelwa phantsi kwisihlalo sevalve ngokusebenzisa i-cage ukuqinisekisa uqhagamshelwano olufanelekileyo, ngakumbi kwizicelo zoxinzelelo oluphezulu. Olunye uyilo lusebenzisa isihlalo sevalve, kwaye itywina kwicala levalve yentonga yediski icinezela isihlalo sevalvu ukukhulula uxinzelelo lokupakisha xa ivelufa ivulwe ngokupheleleyo.

Ngokoyilo lwento yokutywina, ivalve yokumisa inokuvulwa ngokukhawuleza ngokujika okuliqela kwesikhondo sevalve ukuze iqalise ngokukhawuleza ukuqukuqela (okanye ivalwe ukumisa ukuhamba), okanye ivulwe ngokuthe ngcembe ngokujikeleziswa okuninzi kwesiqu sevalve ukuvelisa ngaphezulu. ukuhamba okulawulwayo kwivalve. Nangona iiplagi ngamanye amaxesha zisetyenziswa njengezinto zokutywina, akufanele zidideke kunye neeplagi zeplagi, ezizizixhobo zekota zokujika, ezifana neevalve zebhola, ezisebenzisa iiplagi endaweni yeebhola zokumisa nokuqala ukuhamba.

isicelo

Misa iivalvuzisetyenziselwa ukuvalwa kunye nolawulo lwezityalo zokucocwa kwamanzi amdaka, oomatshini bombane kunye nezityalo zokusetyenzwa. Zisetyenziswa kwimibhobho yomphunga, iisekethe zokupholisa, iinkqubo zokuthambisa, njl.njl., apho ukulawula umthamo wolwelo oludlula kwiivalvu kudlala indima ebalulekileyo.

Ukukhethwa kwezinto ezibonakalayo kumzimba wevalve yeglowubhu kuhlala kugalelwa intsimbi okanye ubhedu / ubhedu kwizicelo zoxinzelelo oluphantsi, kunye nentsimbi yekhabhoni eyenziwe ngentsimbi okanye intsimbi engatyiwayo kuxinzelelo oluphezulu kunye nobushushu. Izinto ezichaziweyo zomzimba wevalvu zihlala zibandakanya onke amalungu oxinzelelo, kwaye "i-trim" ibhekisa kwezinye iindawo ngaphandle komzimba wevalvu, kubandakanya isitulo sevalve, idiski kunye nesiqu. Ubungakanani obukhulu buchongwa yiklasi yoxinzelelo lweklasi ye-ASME, kwaye iibholiti eziqhelekileyo okanye iiflange ze-welding ziyalelwa. Ukulinganisa iivalvu zeglowubhu kuthatha umzamo ongaphezulu kunokulinganisa ezinye iindidi zeevalvu kuba ukuhla koxinzelelo kwivalve kunokuba yingxaki.

Uyilo lokunyuka kwesiqu yeyona nto ixhaphakileyo kwiiivalvu zokumisa, kodwa iivalve ze-stem ezingavukiyo nazo zinokufunyanwa. Ibhonethi idla ngokubotshwa kwaye inokususwa ngokulula ngexesha lokuhlolwa kwangaphakathi kwevalve. Isihlalo sevalve kunye nediski kulula ukuyitshintsha.

Iivalve zokumisa zidla ngokuzenzekela kusetyenziswa ipiston yepneumatic okanye i-diaphragm actuators, esebenza ngokuthe ngqo kwisiqu sevalve ukuhambisa idiski kwindawo. I-piston / i-diaphragm inokuthambekela entwasahlobo ukuvula okanye ukuvala ivalve xa ilahleko yoxinzelelo lomoya. Kwakhona kusetyenziswa i-electric rotary actuator.