Iivalvu zesangokwayeiivalvu zebhabhathanezisetyenziswa njengeeswitshi zokulawula isantya sokuhamba komoya ekusetyenzisweni kwemibhobho. Kakade ke, kusekho iindlela kwinkqubo yokukhetha iivalvu zebhabhathane kunye neevalvu zesango.
Kwinethiwekhi yemibhobho yokuhambisa amanzi, ukuze kuncitshiswe ubunzulu bokugquma komhlaba wepayipi, ububanzi ngokubanzi bombhobho omkhulu buxhotyiswe ngevalvu yebhabhathane, kwaye ukuba ubunzulu bokugquma komhlaba abubalulekanga, zama ukukhetha ivalvu yesango, kodwa ixabiso levalvu yesango elinomlinganiselo ofanayo liphezulu kunexabiso levalvu yebhabhathane. Ngokuphathelele umgca wokwahlulahlula we-caliber, indawo nganye kufuneka iqwalaselwe ngokwemeko nganye. Ngokwembono yokusetyenziswa kweminyaka elishumi edlulileyo, ukusilela kwevalvu yebhabhathane kuphezulu kunokwe-ivalvu yesango, ngoko ke kufanelekile ukuqaphela ukwandisa uluhlu lokusetyenziswa kwevalvu yesango ukuba iimeko ziyavuma.
Kwiminyaka yakutshanje, abavelisi abaninzi beevalvu zasekhaya baye baphuhlisa baza balinganisa iivalvu zesango ezithambileyo, ezineempawu ezilandelayo kuneevalvu zesango ezimbini ezilinganayo okanye ezilinganayo:
IivalvuUmzimba kunye nebhonethi yevalvu yesango lesitywino esithambileyo ziphoswa ngendlela yokuphosa ngokuchanekileyo, eyenziwe ngexesha elinye, ngokusisiseko ayisebenzi ngomatshini, kwaye ayisebenzisi amakhonkco obhedu okutywina, okusindisa iintsimbi ezingezizo iintsimbi.
Akukho mngxuma ezantsi kweivalvu yesango lesitywino esithambileyo, akukho kuqokelelana kwenkunkuma, kunye nezinga lokusilelaivalvu yesangoUkuvula nokuvala kuphantsi.
Ipleyiti yevalvu ethambileyo efakwe uphawu iyafana ngobukhulu kwaye inokutshintsheka ngokulula.
Ngoko ke, ivalvu yesango elithambileyo iya kuba yindlela imboni yokubonelela ngamanzi evuyayo ukuyisebenzisa. Okwangoku, ububanzi bevalvu yesango elithambileyo elenziwe eTshayina yi-1500mm, kodwa ububanzi babavelisi abaninzi buphakathi kwe-80-300mm, kwaye kusekho iingxaki ezininzi kwinkqubo yokuvelisa yasekhaya. Icandelo eliphambili levalvu yesango elithambileyo yipleyiti yevalvu enerabha, kwaye iimfuno zobugcisa zepleyiti yevalvu enerabha ziphezulu, kwaye ayingabo bonke abavelisi bamanye amazwe abanokuyifikelela, kwaye idla ngokuthengwa kwaye ihlanganiswe kumzi-mveliso ngomgangatho othembekileyo.
Ibhloko yekopolo ye-seal ethambileyo yasekhayaivalvu yesangoifakelwe kwaye ixhonywe ngaphezulu kwepleyiti yevalvu yelayini yerabha, efana nolwakhiwo lwevalvu yesango, kwaye ilayini yerabha yepleyiti yevalvu kulula ukuyikrazula ngenxa yokungqubana okusebenzayo kwebhloko yenati. Kwivalvu yesango elithambileyo lenkampani yangaphandle, ibhloko yenati yobhedu ifakelwe kwiram enerabha ukuze yenze iqhekeza elipheleleyo, eliyoyisa iziphene ezingentla, kodwa uxinano lwendibaniselwano yesigqubuthelo sevalvu kunye nomzimba wevalvu luphezulu.
Nangona kunjalo, xa uvula kwaye uvala ivalvu yesango elithambileyo, akufuneki ivalwe kakhulu, logama nje isiphumo sokumisa amanzi sifezekisiwe, kungenjalo akulula ukuyivula okanye ukuyisusa i-lining yerabha. Umenzi weevalvu, kuvavanyo loxinzelelo lweevalvu, ukusetyenziswa kwesikrufu se-torque ukulawula inqanaba lokuvala, njengabaqhubi beevalvu zenkampani yamanzi kufuneka balandele le ndlela yokuvula nokuvala.
Yintoni umahluko phakathi kokusetyenziswa kweiivalvu zebhabhathanekwayeiivalvu zesango?
Ngokwendlela esebenza ngayo ivalvu yesango kunye nevalvu yebhabhathane, ukumelana nokuhamba kwevalvu yesango kuncinci, ukusebenza kokutywina kulungile, kuba indlela yokuhamba kwepleyiti yevalvu yesango kunye ne-medium yi-engile ethe nkqo, ukuba ivalvu yesango ayikho kwindawo yayo kwiswitshi yepleyiti yevalvu, i-medium ekhuhla ipleyiti yevalvu yenza ipleyiti yevalvu ingcangcazele, kwaye kulula ukonakalisa itywina levalvu yesango.
Ivalvu yebhabhathane, eyaziwa ngokuba yivalvu yeflap, sisakhiwo esilula sevalvu elawulayo, enokusetyenziselwa ulawulo lokuvula/ukuvala umbhobho ophantsi. Ivalvu yebhabhathane ibhekisa kwinxalenye yokuvala (idiski okanye ipleyiti yebhabhathane) njengediski, ejikeleza umngxuma wevalvu ukuze kuvulwe kwaye kuvalwe uhlobo lwevalvu, ivalvu ingasetyenziselwa ukulawula ukuhamba kweentlobo ezahlukeneyo zolwelo ezifana nomoya, amanzi, umphunga, iindidi ezahlukeneyo zemidiya ebolayo, udaka, ioyile, isinyithi esilulwelo kunye nemidiya enemisebe. Idlala indima yokusika kunye nokugoba umbhobho. Inxalenye yokuvula nokuvala ivalvu yebhabhathane yipleyiti yebhabhathane enemilo yediski, ejikeleza i-axis yayo emzimbeni wevalvu, ukuze kufezekiswe injongo yokuvula nokuvala okanye yokulungisa.
Ipleyiti yebhabhathane iqhutywa yi-valve stem, kwaye ukuba ijika ibe ngama-90°, ingagqibezela ukuvuleka nokuvala. Ngokutshintsha i-engile yokuphambuka kwebhabhathane, isantya sokuhamba kwe-medium sinokulawulwa.
Iimeko zokusebenza kunye nomgangatho:Ivalvu yebhabhathaneifanelekile ukuthutha imibhobho eyahlukeneyo yemidiya ebolileyo nengabolisiyo kwiinkqubo zobunjineli ezifana nee-ovens, igesi yamalahle, igesi yendalo, igesi yepetroleum enyibilikisiweyo, igesi yesixeko, umoya oshushu nobandayo, ukunyibilikisa iikhemikhali kunye nokukhuselwa kokusingqongileyo kokuveliswa kwamandla, ukunikezelwa kwamanzi kunye nokuhambisa amanzi, njl.njl., kwaye isetyenziselwa ukulawula nokunciphisa ukuhamba kwemidiya.
Ivalvu yesango (ivalvu yesango) yinxalenye yokuvula nokuvala kwesango, indlela isango elihamba ngayo ijonge kwicala lolwelo, ivalvu yesango ingavulwa kwaye ivalwe ngokupheleleyo kuphela, ukungakhululeki kweeparameter zomnyango kwahlukile, ngokuqhelekileyo yi-5°, xa ubushushu obuphakathi bungekho phezulu, yi-2°52′. Ukuphucula indlela eyenzeka ngayo imveliso kunye nokulungisa ukuphambuka kwe-engile yomphezulu wokutywina kwinkqubo yokucubungula, olu hlobo lwe-ram lubizwa ngokuba yi-elastic ram.
Xaivalvu yesangoivaliwe, umphezulu wokutywina unokuxhomekeka kuphela kuxinzelelo oluphakathi ukuze utywine, oko kukuthi, uxhomekeke kuphela kuxinzelelo oluphakathi ukuze ucinezele umphezulu wokutywina we-ram kwisihlalo sevalvu kwelinye icala ukuqinisekisa ukutywina komphezulu wokutywina, okuzitywina ngokwako. Uninzi lweevalvu zesango zitywinwa ngenkani, oko kukuthi, xa ivalvu ivaliwe, i-ram kufuneka icinezelwe ngenkani kwisihlalo sevalvu ngamandla angaphandle ukuqinisekisa ukuqina komphezulu wokutywina.
Imo yokushukuma: Ipleyiti yesango yevalvu yesango ihamba ngomgca othe tye kunye nesiqu sevalvu, esikwabizwa ngokuba yivalvu yesango lentonga evulekileyo. Ngokwesiqhelo kukho umsonto wetrapezoidal kwintonga yokuphakamisa, nge-nut ephezulu yevalvu kunye nomngxuma wesikhokelo emzimbeni wevalvu, intshukumo ejikelezayo iguqulwa ibe yintshukumo ethe tyaba, oko kukuthi, i-torque yokusebenza iguqulwa ibe yi-operating thrust. Xa ivalvu ivuliwe, xa ukuphakama kwe-ram lift kulingana ne-1:1 ngokuphindwe ububanzi bevalvu, ukuhamba kolwelo akuthintelwanga ngokupheleleyo, kodwa le ndawo ayinakujongwa ngexesha lokusebenza. Ekusetyenzisweni kwayo, iphawulwa yi-vertex yesiqu, oko kukuthi, indawo engenakuvulwa, njengendawo yayo evulekileyo ngokupheleleyo. Ukuze kujongwe isiganeko sokutshixa kotshintsho lobushushu, idla ngokuvulelwa kwindawo ye-apex, ize ibuyiselwe kwi-1/2-1 turn njengendawo yevalvu evulekileyo ngokupheleleyo. Ke ngoko, indawo evulekileyo ngokupheleleyo yevalvu imiselwa yindawo ye-ram (oko kukuthi i-stroke). I-gate valve stem nut ibekwe kwisango, kwaye i-handwheel iyajikeleza ukuze iqhube i-valve stem ukuba ijikeleze, kwaye i-gate plate iyaphakanyiswa, le valve ibizwa ngokuba yi-rotary rod gate valve okanye i-dark rod gate valve.
Ixesha lokuthumela: Agasti-22-2024
