D400 Iron Manhole Npog

Round manhole npog haum txig nrog thav ntawv, muab kev sib khi zoo dua tiv thaiv dej thiab tsw ntxhiab. Lawv tuaj yeem tig 360 degrees dawb, ua kom nqa thiab ua kom yooj yim dua. Loj - txoj kab uas hla hnyav- lub luag haujlwm npog hnyav dua. Tsis tas li ntawd, qhov chaw ntxiv qhov nkhaus yuav tsum tau nyob ib ncig ntawm lub qhov dej, yog li lawv tsis tshua muaj qis dua cov square ones rau ntom layout.

Square manhole npog muaj qhov kev taw qhia ruaj khov thiab xav tau kev sib dhos ntawm tag nrho plaub sab thaum haum. Rau tib lub load-cov kabmob muaj peev xwm, lawv siv cov khoom siv tsawg dua thiab hnyav dua me ntsis. Nrog cov npoo zoo nkauj, lawv txuag tau ntau qhov chaw pavement thaum ntau qhov dej tau npaj ib sab, yog li cov square hom tau dav siv rau kev sib xyaw ua ke ntawm cov qhov dej hluav taws xob.

Tau txais txiaj ntsig los ntawm lub zog siab thiab siab tawv ntawm cov khoom siv hlau, qhov hnyav ntawm manhole npog ntawm tib lub ntsiab lus tuaj yeem raug txo los ntawm 30% piv nrog cov tsoos grey cam khwb cia hlau.

Cov khoom no boasts zoo heev cuam tshuam kuj thiab toughness piv rau nruab nrab carbon steel, tshaj kaum npaug superior rau grey cam khwb cia hlau. Nws nta zoo heev corrosion kuj thiab durability, nrog ib tug kev pab cuam lub neej ob zaug ntawm grey cam khwb cia hlau kav thiab tsib zaug ntawm zoo tib yam steel kav.

Cov khoom no muaj cov yas zoo heev nrog kev elongation tom qab tawg ntawm ntau dua 7%, mus txog qib piv rau cov pa roj carbon siab, qhov grey cam khwb cia hlau tsis muaj cov yas elongation txhua. Nws tseem muaj lub zog zoo tshaj plaws, nrog lub zog tensile tsis tsawg dua 420MPa thiab lub zog tawm los ntawm tsis muaj tsawg dua 300MPa, sib npaug rau cov hlau tsis tshua muaj carbon steel thiab peb zaug ntawm grey cam khwb cia hlau.

Cov khoom siv hlau raug nqi tsawg dua cov hlau cam khwb cia. Nws txaus siab rau daim ntawv thov dav dua ua tsaug rau nws tus nqi pheej yig, nrog rau kev ua haujlwm siab dua thiab kev siv tshuab qis dua.