Ukwahlulahlula kunye nokusetyenziswa kweevalvu zokujonga
Ivalvu yokukhangela ibhekisa kwiindawo zokuvula nezokuvala zevalvu ejikelezayo kwaye ixhomekeke kubunzima bayo kunye noxinzelelo lwemidiya ukuvelisa isenzo sokuthintela ukuhamba okuphakathi kwevalvu. Ivalvu yokukhangela yivalvu ezenzekelayo, ekwaziwa ngokuba yivalvu yokukhangela, ivalvu yendlela enye, ivalvu engabuyiyo okanye ivalvu yokwahlukanisa.
Intshukumo ye-Flap yahlulwe yabaivalvu yokujonga ukuphakamakwayeivalvu yokujonga iswing. Ivalvu yokujonga ilifti kunye nesakhiwo sevalvu yeglobe ziyafana, kuphela kukungabikho kwesiqu sevalvu sokuqhuba iflaphu yevalvu. I-medium evela kwicala lokungena (icala elingezantsi), ukusuka kwicala lokuphuma (icala eliphezulu). Xa uxinzelelo lokungena lungaphezulu kobunzima beflaphu yevalvu kunye nokumelana kwayo nokuhamba kwaye xa ivalvu ivuliwe. Ngokwahlukileyo koko, ivalvu ivaliwe xa i-medium ibuyela umva. Ivalvu yokujonga i-swing ine-slant kwaye inokujikeleza kwi-axis yeflaphu yevalvu, umgaqo wokusebenza ufana nevalvu yokujonga i-lift. Iivalvu zokujonga zihlala zisetyenziswa njengevalvu esezantsi yesixhobo sokupompa, enokuthintela ukuhamba kwamanzi ngasemva. Iivalvu zokujonga kunye neevalvu zeglobe ezisetyenziswa ngokudibeneyo, zinokudlala indima ekhuselekileyo yokwahlukanisa. Iingxaki kukuxhathisa okuphezulu kunye nokutywinwa okubi xa kuvaliwe.
Okokuqala, ivalvu yokujonga ukuphakama ineentlobo ezimbini ezithe nkqo nezithe tye.
Imilo yomzimba wevalvu yevalvu yokujonga ukuphakama iyafana neyevalvu yeglobe, ngoko ke inokumelana okukhulu kolwelo. Iflaphu yevalvu ityibilika kumgca othe nkqo wombindi wevalvu. Xa i-medium igeleza, iflaphu yevalvu ivulwa yi-medium thrust, kwaye xa i-medium iyeka ukuhamba, iflaphu yevalvu ibekwa kwisihlalo sevalvu ngokuzixhoma.
Ivalvu yokujonga ukuphakanyiswa okuthe nkqo. Icala eliphakathi lokungena kunye nelangaphandle kunye necala eliphakathi kwetshaneli yesihlalo sevalvu liyafana, ukumelana nokuhamba kwamanzi kuncinci kunohlobo oluthe tye. Ivalvu yokujonga ukuphakanyiswa okuthe nkqo ifakwe kwipayipi ethe nkqo.I-valve yokujonga ukuphakanyiswa ingafakwa kuphela kumbhobho othe tye. Ithintelwe ziimfuno zokufakela, isetyenziswa rhoqo kwiimeko ezincinci ze-DN <50.
Okwesibini, idiski yevalvu yokujonga iswing ikwimo yesangqa kwaye ijikeleza i-axis yetshaneli yesihlalo sevalvu.
Ngenxa yetshaneli elungelelanisiweyo ngaphakathi kwevalvu, ukumelana nokuhamba kwamanzi kuncinci kunevalvu yokujonga ukuphakama. Ifanelekile kwiipayipi ezincinci neziphakathi, ezinoxinzelelo oluphantsi, kunye nobukhulu obukhulu (izinga lokuhamba kwamanzi eliphantsi kunye nobubanzi obukhulu apho ukuhamba kwamanzi kungatshintshi rhoqo). Ukusebenza kokutywina akulunganga njengohlobo lokuphakamisa.
Iivalvu zokujonga i-swing zahlulwe zibe ziintlobo ezintathu: i-single disc, i-double disc, kunye ne-multi disc. Ezi ntlobo zintathu zahlulwe ngokusekwe kububanzi bevalvu, ukuze kuthintelwe ukushukuma kwe-hydraulic xa i-medium iyeka ukuhamba okanye ibuyela umva. Iivalvu zokujonga i-single disc swing ngokubanzi zifanelekile kwiindlela eziphakathi. Xa usebenzisa i-single disc swing check valve kwimibhobho emikhulu, kungcono ukusebenzisa i-valve yokujonga i-closing ecothayo enokunciphisa uxinzelelo lwe-water hammer ukuze kuncitshiswe uxinzelelo lwe-water hammer. Iivalvu zokujonga i-double disc swing zifanelekile kwiipayipi ezinkulu neziphakathi. I-double disc swing check valve enesakhiwo esincinci kunye nobunzima obuncinci yi-check valve ekhula ngokukhawuleza; Iivalvu zokujonga i-multi disc swing zifanelekile kwiipayipi ezinkulu.Indawo yokufaka ivalvu yokujonga ukujika ayikhawulelwanga, kwaye ingafakwa kwimibhobho ethe tye, ethe nkqo, okanye ethambekileyo.
Okwesithathu, ivalvu yokujonga ibhabhathane: uhlobo oluthe tye.
Ulwakhiwo lwevalvu yokujonga ibhabhathane lufana nevalvu yebhabhathane. Ulwakhiwo lwayo lulula, alunakumelana nokuhamba kwamanzi, uxinzelelo lwehamile yamanzi nalo luncinci. I-flap yevalvu ijikeleza iphini kwisihlalo sevalvu yevalvu yokujonga. Ivalvu yokujonga uhlobo lwediski inesakhiwo esilula, inokufakelwa kuphela kumbhobho othe tye, ukutywinwa kwayo akusebenzi kakuhle.
Okwesine, ivalvu yokujonga i-diaphragm: kukho iintlobo ngeentlobo zezakhiwo, zonke zisebenzisa i-diaphragm njengeendawo zokuvula nezokuvala.
Ngenxa yokusebenza kwayo njengesando samanzi, ulwakhiwo olulula, ixabiso eliphantsi, i-valve yokujonga i-diaphragm ikhawuleza kakhulu kwiminyaka yakutshanje. Kodwa ukusetyenziswa kwe-diaphragm jonga ubushushu kunye noxinzelelo lwe-valve kusetyenziswa imida yezinto ze-diaphragm.Ivalvu yokujonga i-diaphragm ifanelekile ukuba kube lula ukuvelisa impembelelo yamanzi kwipayipi, i-diaphragm inokuba luncedo kakhulu ekususeni i-medium ngokuchasene nokuhamba kwamanzi okubangelwa yimpembelelo, isetyenziswa ngokubanzi kwipayipi yobushushu obuphantsi, ifanelekile ngakumbi kwipayipi yamanzi, ubushushu obuqhelekileyo bokusebenza kwe-medium kwi--12 - 120 ℃ phakathi koxinzelelo lokusebenza lwe-<1.6MPa, kodwa ivalvu yokujonga i-diaphragm inokwenziwa ukuze kufunyanwe i-calibre enkulu, ubuninzi bunokufikelelwa kwi-DN 2000mm okanye ngaphezulu! Nangona kunjalo, ivalvu yokujonga i-diaphragm inokuba yi-calibre enkulu, i-DN inokufikelela kwi-2000mm okanye ngaphezulu.
