Ivalvu yesango ibhekisa kwivalvu apho ilungu lokuvala (isango) lihamba kwicala elithe nkqo lomgca ophakathi wendlela. Ivalvu yesango ingasetyenziselwa kuphela ukuvala okuvulekileyo nokuvalekileyo kwipayipi, kwaye ayinakusetyenziswa ukulungisa nokubopha. Ivalvu yesango luhlobo lwevalvu enokusetyenziswa okubanzi. Ngokubanzi, izixhobo zokusika ze-DN50 zikhethwa ukuba zisetyenziswe, kwaye ngamanye amaxesha iivalvu zesango zisetyenziselwa nezixhobo zokusika ezinobubanzi obuncinci. Ivalvu yesango isetyenziswa njengendawo yokusika, kwaye ukuhamba konke kuthe tye xa ivuliwe ngokupheleleyo. Ngeli xesha, ukulahleka koxinzelelo lwendawo yokucoca kuncinci. Iivalvu zesango zihlala zifanelekile kwiimeko zokusebenza ezingadingi ukuvulwa nokuvalwa rhoqo kwaye zigcine isango livulekile ngokupheleleyo okanye livaliwe ngokupheleleyo. Ayifanelekanga ukusetyenziswa njengommiselo okanye ukubhoboza. Kwindawo yokucoca ehamba ngesantya esiphezulu, isango linokubangela ukungcangcazela kwesango xa livuliwe kancinci, kwaye ukungcangcazela kunokonakalisa umphezulu wokutywina wesango kunye nesihlalo sevalvu, kwaye ukubhoboza kuya kubangela ukuba isango likhukuliswe yi-medium.
Ukusuka kwimo yesakhiwo, umahluko ophambili yindlela esetyenziswa ngayo into yokutywina. Ngokwendlela izinto zokutywina ezisetyenziswa ngayo, iivalvu zesango zihlala zahlulwe zibe ziintlobo ezahlukeneyo, ezinje: ivalvu yesango le-wedge, ivalvu yesango elihambahambayo, ivalvu yesango elihambahambayo, ivalvu yesango elihambahambayo, njl. Ezona ndlela zisetyenziswa kakhulu ziivalvu zesango le-wedge kunye neevalvu zesango elihambahambayo.
Isango lineendawo ezimbini zokutywina. Iindawo ezimbini zokutywina zevalvu yesango le-wedge esetyenziswa kakhulu zenza i-wedge. I-engile ye-wedge iyahluka ngokweeparamitha zevalvu, ngokuqhelekileyo ii-degrees ezi-5. Isango levalvu yesango le-wedge lingenziwa libe lilonke, elibizwa ngokuba yi-rigid gate; lingenziwa libe yisango elinokubangela ukuguquka okuncinci ukuphucula ukwenziwa kwalo kwaye lilungise ukuphambuka kwe-engile yomphezulu wokutywina ngexesha lokucubungula. Ipleyiti ibizwa ngokuba yi-elastic gate.
Xa ivalvu yesango ivaliwe, umphezulu wokutywina unokuxhomekeka kuphela kuxinzelelo oluphakathi ukuze utywine, oko kukuthi, ukuxhomekeka kuxinzelelo oluphakathi ukuze ucinezele umphezulu wokutywina wesango ukuya kwisihlalo sevalvu kwelinye icala ukuqinisekisa ukutywinwa komphezulu wokutywina, okuzitywina ngokwako. Uninzi lweevalvu zesango zisebenzisa ukutywinwa okunyanzelekileyo, oko kukuthi, xa ivalvu ivaliwe, isango kufuneka linyanzeliswe kwisihlalo ngamandla angaphandle ukuqinisekisa ukuqina komphezulu wokutywina.
Ivalvu yesango yevalvu yesango ihamba ngokuthe ngqo kunye nesiqu sevalvu, esibizwa ngokuba yivalvu yesango lesiqu sokuphakamisa (ekwabizwa ngokuba yivalvu yesango lesiqu sokuphakamisa). Ngokwesiqhelo kukho umsonto wetrapezoidal kwintonga yokuphakamisa, nge-nut ephezu kwevalvu kunye nomjelo wesikhokelo emzimbeni wevalvu, intshukumo ejikelezayo iguqulwa ibe yintshukumo ethe ngqo, oko kukuthi, i-torque yokusebenza iguqulwa ibe yi-operating thrust.
Xa ivalvu ivuliwe, xa ukuphakama kwesango kufana nobukhulu bevalvu obuphindwe nge-1:1, indlela yolwelo ivuliwe ngokupheleleyo, kodwa le ndawo ayinakujongwa ngexesha lokusebenza. Xa isetyenziswa ngokwenene, umphezulu wesiqu sevalvu usetyenziswa njengophawu, oko kukuthi, indawo apho ingenakuvulwa khona, njengendawo yayo evulekileyo ngokupheleleyo. Ukuze kuthathelwe ingqalelo into yokutshixa ngenxa yotshintsho lobushushu, idla ngokuvulelwa kwindawo ephezulu, ize ijike nge-1/2 ~ 1, njengendawo yevalvu evuleke ngokupheleleyo. Ke ngoko, indawo evulekileyo ngokupheleleyo yevalvu imiselwa yindawo yesango (oko kukuthi, istroke).
INortech ngomnye wabavelisi beevalvu zoshishino abaphambili eTshayina abanesiqinisekiso somgangatho se-ISO9001.
Ixesha lokuthumela: Agasti-16-2021