Ububanzi bevalvu Φ, ububanzi DN, intshi” Ungazihlukanisa amayunithi wokucaciswa?

Kuvamise ukuba nabangani abangazwisisi ubudlelwano hlangana nokucaciswa kwe-“DN”, “Φ" kunye """. Namhlanjesi, ngizokufingqa ubuhlobo hlangana nabathathu, ngithemba ukukusiza!

yini i-intjhi”

I-intshi (") yiyunithi esetjenziswa khulu ehlelweni le-Amerikha, njengamapayipi wensimbi,amavalvu, ama-flange, ama-elbow, amaphampu, ama-tees, njll., njengokuthi ukucaciswa ku-10′′.

I-intshi (i-intjhi, ifingqwe njenge-in.) kutjho isithupha ngesi-Dutch, begodu i-intjhi bude besithupha. Vele, ubude besithupha nabo buhlukile. Ngekhulu le-14, iKosi u-Edward II yamemezela "I-Standard Legal Inch". Umthetho kukuthi ubude bamabele amathathu amakhulu akhethwe phakathi kweendlebe zebhali begodu ahlelwe ngokulandelana buyi-intjhi yinye.

Ngokuvamileko 1′′=2.54cm=25.4mm

Khuyini i-DN

I-DN yiyunithi yokuhlathulula esetjenziswa khulu e-China neenhlelo ze-Europe, begodu ibuye ibe yindlela yokumaka amapayipi,amavalvu, amafletjhi, ukufakwa, kanye namapompo, afanaDN250.

I-DN itjho ububanzi obubizwako bephayiphu (eyaziwa nangokuthi ububanzi obubizwako), qaphela: lokhu akusibo ububanzi bangaphandle nofana ububanzi bangaphakathi, kodwana isilinganiso sobubanzi bangaphandle nobubanzi bangaphakathi, okubizwa ngokuthi bubanzi bangaphakathi obuphakathi.

YiniΦ

Φ yiyunithi ejayelekileko, etjho ububanzi bangaphandle bamapayipi, nofana iindlovu, isimbi eyindilinga nezinye izinto.

Nje-ke khuyini ukuhlobana hlangana kwabo?

Kokuthoma, iinhlathululo ezitshwaywe ngo-“”" no-“DN” zipheze zifane. Ngokuyinhloko zitjho ububanzi obubizwako, okutjengisa ubukhulu balokhu kucaciswa, begoduΦ yihlanganisela yalokhu kokubili.

Isibonelo

Ukwenza isibonelo, nangabe iphayiphi yensimbi yi-DN600, nangabe iphayiphu yensimbi efanako itshwaywe ngamasentimitha, iba yi-24′′. Ingabe kukhona ukuhlobana hlangana nalokhu kokubili?

Ipendulo nguyebo! I-intjhi ejwayelekileko yinombolo epheleleko begodu nayiphindaphindwe ngqo ngo-25 ilingana ne-DN, njenge-1′′*25=DN25, 2′′*25=50, 4′′*25=DN100, njll. Kuliqiniso, kunezinye ezihlukileko ezifana ne-3′′*25=75 Ukurhonda kungu-DN80, begodu kuneenqhema ezifana nama-decimal njenge-1/2″, 3/4″, 1-1/4″, 1-1/2″, 2-1/2″, 3-1/ 2″ njalonjalo, lokhu angeze kubalwa njalo, kodwana ukubalwa kuyafana, ngokuyisisekelo inani eliveziweko:

1/2′′=DN15

3/4′′=DN20

1-1/4′′=DN32

1-1/2″=DN40

2′′=DN50

2-1/2′′=DN65

3′′=DN80