Thaum xaiv thiab txhim kho manhole npog, ntxiv rau kev ua raws li cov lus pom zoo, cov cai, thiab cov lus qhia tshwj xeeb, lub zog, lub hom phiaj, thiab kev siv yooj yim yuav tsum tau txiav txim siab.
Lub zog ntawm lub manhole npog yog feem ntau xav txog nyob rau hauv lub thickness ntawm lub npog phaj thiab tus naj npawb ntawm fastening bolts. Feem ntau, lub thickness ntawm lub npog phaj yuav tsum tsis txhob tsawg tshaj li lub thickness ntawm lub hull structural steel phaj (lub lawj, platform, puab hauv qab phaj, thiab bulkhead) ntawm lub installation qhov chaw. Txij li cov phaj npog yog qhov muaj kev cuam tshuam ntau dua rau kev xeb ntau dua li qhov puag ncig ntawm cov khoom siv hlau phaj, thaum lub thickness ntawm lub hull structural steel phaj ntawm lub manhole cover installation qhov chaw yog tsawg tshaj li 10 hli, lub cover phaj thickness yuav tsum yog 1 hli ntau dua li cov thickness ntawm lub hull structural steel phaj ntawm qhov chaw. Yog hais tias lub lawj los yog bulkhead ntawm lub manhole cover installation qhov chaw yog txiav txim los ntawm lub zog xam, lub thickness ntawm lub manhole npog phaj ntawm qhov chaw yuav tsum muaj peev xwm tiv tau tib yam dej siab tej yam kev mob.
Lub npog manhole yuav tsum raug xaiv raws li qhov yuav tsum tau ua kom nruj nruj thiab cov xwm txheej ntawm qhov chaw teeb tsa, xaiv cov qauv tsim nyog. Watertight manhole npog nrog dej hiav txwv-cov roj hmab tiv taus (cov dej tsis qab) yuav tsum tau siv rau hauv cov tso tsheb hlau luam dej tshiab, lub tank dej ballast, thiab cov hneev nti thiab cov stern tanks.
Oiltight manhole npog nrog surge-cov roj hmab roj hmab tiv thaiv yuav tsum tau siv rau hauv cov roj tank, lubricating roj tank, thiab sludge roj tanks. Hom A manhole npog nrog cov ntaub thaiv npog yuav tsum tau siv rau hauv pem teb sab hauv ntawm cov chaw uas muaj dej los yog cov roj tsub zuj zuj, xws li chav cav, thiab nyob rau sab saum toj ntawm cov dej haus. Thaum lub manhole npog yog tsim nyog nyob rau hauv passageways thiab nyob / ua hauj lwm compartments uas cuam tshuam rau cov neeg ua hauj lwm txav, recessed manhole npog yuav tsum tau xaiv. Manhole npog rau dav hlau roj tso tsheb hlau luam yuav tsum tau ua los ntawm tooj dag kom tsis txhob muaj qhov cuam tshuam los ntawm kev cuam tshuam. Thaum cov npog manhole yuav raug rau qhov chaw ntub dej ntev, lawv cov bolts lossis studs yuav tsum tau ua los ntawm stainless hlau. Cov txiv ntseej yuav tsum tau ua los ntawm stainless hlau, tooj dag, los yog galvanized hlau.
Los ntawm qhov kev xav ntawm kev siv manhole npog, qhov loj dua los ntawm - qhov loj yog qhov zoo rau cov neeg ua haujlwm nkag. Txawm li cas los xij, vim muaj ntau yam xws li cov qauv hull, cov cuab yeej siv tshuab, thiab cov raj xa dej, qhov luaj li cas ntawm cov manhole npog yuav raug rau qee yam kev txwv. Feem ntau, manhole npog nrog rau ntawm - qhov loj ntawm 500 mm × 400 mm yog qhov tsim nyog rau kev teeb tsa hauv qhov chaw kab rov tav (decks, platforms, sab hauv qab phaj). Tshwj tsis yog tias muaj teeb meem tiag tiag hauv kev teeb tsa, manhole npog nrog qhov dhau los ntawm - qhov loj ntawm 450 mm × 350 mm yuav tsum zam kom ntau li ntau tau. Manholes nrog ib tug mus txog{11}} qhov loj ntawm 600 mm × 450 mm yuav tsum tau muab ntsia rau hauv cabins los yog lwm qhov chaw ntsug, thiab lawv cov axis ntev yuav tsum tau teem nyob rau hauv txoj kev ntsug. Cov ntug qis ntawm qhov dhau los ntawm - qhov yuav tsum yog tsawg kawg 500 mm saum toj no hauv av uas cov neeg ua haujlwm sawv los pab cov neeg ua haujlwm hla lub qhov.
