Iyini i-valve yesango?
Ama-valve esango asetshenziswa kabanzi kuzo zonke izinhlobo zezicelo futhi afaneleka kokubili ukufakwa okungaphezulu komhlaba nangaphansi komhlaba. Okungenani ekufakweni okungaphansi komhlaba kubalulekile ukukhetha uhlobo olulungile lwe-valve ukuze ugweme izindleko eziphezulu zokushintsha.
Ama-valve esango enzelwe isevisi evulekile noma evalwe ngokugcwele. Afakwe emapayipini njengama-valve ahlukanisayo, futhi akufanele asetshenziswe njengama-valve okulawula noma okulawula. Ukusebenza kwevalvu yesango kwenziwa ngokwenza ukuhamba kwewashi ukuze kuvalwe (CTC) noma njengokuhamba kwewashi ukuze uvule (CTO) ukunyakaza okuzungezisayo kwesiqu. Lapho usebenzisa isiqu se-valve, isango liya phezulu noma phansi engxenyeni enentambo yesiqu.
Ama-valve esango avame ukusetshenziswa lapho ukulahlekelwa kwengcindezi encane kanye ne-bore yamahhala kuyadingeka. Uma ivuliwe ngokugcwele, i-valve yesango evamile ayinakho ukuvinjelwa endleleni yokugeleza okuholela ekulahlekelweni kwengcindezi ephansi kakhulu, futhi lo mklamo wenza kube nokwenzeka ukusebenzisa ingulube yokuhlanza ipayipi. I-valve yesango i-valve ye-multiturn okusho ukuthi ukusebenza kwe-valve kwenziwa ngesiqu esinentambo. Njengoba i-valve kufanele iphenduke izikhathi eziningi ukuze isuke endaweni evulekile iye endaweni evaliwe, ukusebenza kancane futhi kuvimbela imiphumela yesando samanzi.
Ama-valve esango angasetshenziselwa inqwaba yoketshezi. ama-valve esango afaneleka ngaphansi kwezimo zokusebenza ezilandelayo:
- Amanzi aphuzwayo, amanzi angcolile kanye noketshezi olungathathi hlangothi: izinga lokushisa eliphakathi kuka-20 no-+70 °C, isivinini sokugeleza esiphezulu esingu-5 m/s kanye nokucindezela kokuhluka okufika ku-16 bar.
- Igesi: izinga lokushisa eliphakathi kuka--20 no-+60 °C, isivinini sokugeleza esiphezulu esingu-20 m/s nokucindezela kokuhluka okufika ku-16 bar.
Ama-valve esango amise okwe-parallel vs
Ama-valve esango angahlukaniswa abe yizinhlobo ezimbili eziyinhloko: Okufana nokumise okwe-wedge. Amavalvu esango ahambisanayo asebenzisa isango eliyisicaba phakathi kwezihlalo ezimbili ezihambisanayo, futhi uhlobo oludumile ivalvu yesango lommese eklanywe ngomphetho obukhali phansi kwesango. Ama-valve esango amise okwe-wedge asebenzisa izihlalo ezimbili ezigobile kanye nesango elithambekile elingahambisani kancane.
Insimbi ehlezi ngokumelene namavalvu esango ahlezi eqinile
Ngaphambi kokuba kwethulwe i-valve yesango ehlezi eqinile emakethe, ama-valve esango ane-wedge ehlezi yensimbi ayesetshenziswa kakhulu. Idizayini ye-conical wedge kanye nemishini yokuvala eyi-angular ye-wedge ehlezi yensimbi idinga ukudangala phansi kwevalvu ukuze kuqinisekiswe ukuvalwa okuqinile. Ngalokhu, isihlabathi namatshe amatshe kushunyekwa emgodini. Uhlelo lwamapayipi alusoze lwakhululeka ngokuphelele ekungcoleni kungakhathaliseki ukuthi ipayipi ligezwa kahle kangakanani lapho lifakwa noma lilungiswa. Ngakho-ke noma iyiphi i-wedge yensimbi izogcina ilahlekelwe amandla ayo okuqina.
Ivalvu yesango ehlezi eqinile ine-valve ephansi evumela ukudlula kwamahhala kwesihlabathi namatshe amatshe kuvalvu. Uma ukungcola kudlula njengoba i-valve ivala, indawo yerabha izovala eduze kokungcola ngenkathi i-valve ivaliwe. Inhlanganisela yenjoloba yekhwalithi ephezulu imunca ukungcola njengoba ivalvu ivala, futhi ukungcola kuzosuswa lapho ivalvu ivulwa futhi. Indawo yerabha izophinda ithole umumo wayo wasekuqaleni ivikela ukuvala okuqinile.
Amavalvu amaningi esango ahlezi eqinile, nokho amavalvu esango ahlala ensimbi asacelwa kwezinye izimakethe, ngakho-ke aseyingxenye yohlu lwethu lokuhlinzekwa kwamanzi nokuhlanzwa kwamanzi angcolile.
Amavalvu esango anomklamo wesiqu esikhuphukayo uma siqhathaniswa nesingaphumi
Iziqu eziphakamayo zigxilwe esangweni futhi ziyakhuphuka futhi zehle ndawonye njengoba i-valve isebenza, ihlinzeka ngenkomba ebonakalayo yendawo yevalvu futhi yenza kube nokwenzeka ukugcoba isiqu. Inadi lizungeza isiqu esinentambo bese liyasihambisa. Lolu hlobo lufanele ukufakwa ngaphezulu komhlaba kuphela.
Iziqu ezingakhuphuki zixhunywa esangweni, futhi zizungezisa nge-wedge ekhuphuka futhi yehla ngaphakathi kwevalve. Zithatha isikhala esincane esiqondile njengoba isiqu sigcinwa ngaphakathi komzimba wevalvu.
Ama-valve esango ane-by-pass
Ama-valve e-by-pass ngokuvamile asetshenziselwa izizathu ezintathu eziyisisekelo:
- Ukuvumela ingcindezi ehlukene yamapayipi ukuthi ilingane, kwehliswe imfuneko yetorque yevalvu futhi kuvumele ukusebenza komuntu oyedwa.
- Njengoba i-valve eyinhloko ivaliwe futhi i-by-pass ivuliwe, ukugeleza okuqhubekayo kuvunyelwe, ukugwema ukumila okungenzeka
- Ukugcwaliswa okubambezelekile kwamapayipi
Isikhathi sokuthumela: Apr-20-2020