Yintoni "i-intshi": I-intshi (") yiyunithi yenkcazo eqhelekileyo yenkqubo yaseMelika, njengemibhobho yentsimbi, iivalvu, iiflange, iingqiniba, iimpompo, iitiyi, njl.
Intshies (i-intshi, ifinyeziwe njenge-in.) ithetha ubhontsi ngesiDatshi, kwaye i-intshi enye bubude bobhontsi. Kakade ke, ubude bobhontsi bomntu bukwahlukile. Ngenkulungwane ye-14, uKumkani u-Edward II wakhupha "i-intshi esemthethweni esemthethweni".
Kuxelwe ukuba ubude beenkozo ezintathu ezinkulu ezikhethiweyo phakathi kwesikhwebu sebhali kwaye zilungelelaniswe ngokulandelelana yi-intshi enye.
Ngokubanzi 1″=2.54cm=25.4mm
Yintoni i-DN: I-DN yiyunithi yokucacisa esetyenziswa ngokuqhelekileyo kwiinkqubo zaseTshayina naseYurophu. Ikwayingcaciso yokuchonga imibhobho, iivalvu, iiflange, izixhobo zombhobho kunye neepompo, ezifana ne-DN250.
I-DN ibhekiselele kwidayamitha yesiqhelo yombhobho (ekwabizwa ngokuba yi-diameter ye-nominal), qaphela: oku akusiyo i-diameter yangaphandle okanye i-diameter yangaphakathi, yi-avareji ye-diameter yangaphandle kunye ne-diameter yangaphakathi, ebizwa ngokuba yi-avareji ye-diameter yangaphakathi.
Yintoni i-Φ: Φ yiyunithi eqhelekileyo, ebhekisela kububanzi obungaphandle beepayipi, i-elbows, intsimbi ejikelezayo kunye nezinye izinto. Kwakhona kunokuthiwa yi-diameter. Umzekelo, i-Φ609.6mm ibhekisa kwidayamitha engaphandle ye-609.6mm.
Ngoku sifumene ukuba ezi yunithi zintathu zimele, yintoni unxibelelwano phakathi kwazo?
Okokuqala, "Intsingiselo ye "DN" iphantse yafana naleyo ye-DN, ngokusisiseko ithetha i-diameter yegama, ebonisa ubungakanani bolu nkcukacha, kwaye Φ kukudibanisa ezi zimbini.
Umzekelo: ukuba umbhobho wensimbi yi-DN600, kwaye umbhobho wensimbi ofanayo uphawulwe ngee-intshi, uba ngama-24". Ngaba kukho unxibelelwano phakathi kwezi zimbini?
Impendulo nguewe! I-intshi ngokubanzi luphinda-phindo oluthe ngqo lwenani elipheleleyo ngo-25, elilingana ne-DN, efana no-1″*25=DN25 2″*25=50 4″*25=DN100 njalo njalo.
Ewe kunjalo, zikwakhona ezahlukeneyo, ezinje ngo 3″*25=75, usondezwe kweyona DN80 ikufutshane, kwaye ezinye ii-intshi ezinesemikholoni okanye amanqaku edecimal, anje nge 1/2″ 3/4″ 1-1/4″ 1 -1/2″ 2-1 /2″ 3-1/2″, njl., ezi azinakubalwa ngolo hlobo, kodwa ubalo luphantse lufane, ngokwesiseko ixabiso elichaziweyo:
1/2″=DN15 3/4″=DN20 1-1/4″=DN32 1-1/2″=DN40 2-1/2″=DN65 3-1/2″=DN90
Ixesha lokuposa: Mar-10-2022
