Precast ncaj qha- faus insulated kav muaj peb txheej: ib tug ua hauj lwm steel yeeb nkab, ib tug polyurethane npuas rwb thaiv tsev txheej, thiab ib tug siab - ntom polyethylene txheej tiv thaiv yeeb nkab. Polyurethane ua npuas ncauj yog lub hauv paus ntsiab lus txiav txim siab qhov kev ua tau zoo ntawm kev rwb thaiv tsev, tab sis ntawm ob qho kawg ntawm cov yeeb nkab, cov npuas dej tau nthuav tawm, ua rau nws qhov tsis muaj zog tshaj plaws hauv tag nrho cov kav dej. Waterproof kaus mom yog cov khoom tshwj xeeb uas siv los kaw cov xaus no.
Lub luag haujlwm tseem ceeb ntawm cov kaus mom tsis muaj dej tsis zoo yog kev tiv thaiv dej. Polyurethane ua npuas ncauj muaj cov thermal conductivity tsawg heev nyob rau hauv lub xeev qhuav, uas ua rau cov rwb thaiv tsev zoo heev. Txawm li cas los xij, ib zaug dej nkag mus, cov thermal conductivity ntawm cov dej yog ntau tshaj nees nkaum npaug ntawm cov huab cua, ua rau muaj kev poob qis hauv cov npuas dej ua haujlwm. Ntau qhov tseeb, polyurethane raug rau qhov chaw ntub dej rau lub sijhawm ntev yuav raug hydrolysis, maj mam softening thiab hmoov, nws thiaj li poob tag nrho nws cov rwb thaiv tsev muaj nuj nqi thiab lub zog ntawm cov qauv. Thaum lub sij hawm kev thauj mus los, kev khaws cia, thiab cov theem pib ntawm kev teeb tsa cov yeeb nkab, lub kaus mom tsis muaj dej muaj qhov cuam tshuam zoo rau qhov ua npuas ncauj kawg. Tsis tas li ntawd, yog tias cov khib nyiab xws li av nkos, xuab zeb, thiab pob zeb poob rau hauv cov yeeb nkab kawg ntawm qhov chaw tsim kho thiab tsis huv ua ntej sib khi, nws yuav cuam tshuam ncaj qha rau lub zog sib txuas ntawm cov qub thiab tshiab ua npuas ncauj ntawm qhov sib koom ua ke. Waterproof kaus mom kuj tiv thaiv kev nkag ntawm cov khib nyiab. Muaj cov qauv rau kev xaiv thiab kev teeb tsa ntawm lub kaus mom tsis muaj dej. GB/T 50538-2020, "Technical Standard for Anti-corrosion and Thermal Insulation Layers of Buried Steel Pipelines," qhia tias thaum qhov kub ntawm qhov nruab nrab thauj tsis pub tshaj 80 degree, hluav taws xob hla -txuas polyethylene cov khoom siv hluav taws xob ntawm lub ntsej muag yuav tsum tau ua los ntawm{12} txuas polyethylene cov khoom siv hluav taws xob ntawm lub ntsej muag ntawm cov dej tsis sib haum. cov yeeb nkab insulated, nrog qhov sib tshooj ntev ntawm tsis pub tsawg tshaj 50 hli nrog cov txheej txheem tiv thaiv corrosion thiab txheej tiv thaiv. Yam tsawg kawg ntawm 150 hli ntawm qhov chaw yuav tsum tau tshwj tseg rau qhov kawg ntawm cov yeeb nkab insulated rau kev sib koom ua haujlwm. Thaum lub sijhawm teeb tsa, ua ntej, tso lub hau dej rau ntawm qhov kawg ntawm cov yeeb nkab steel, tshem tawm cov hmoov ua npuas ncauj, thiab rhuav tshem cov yeeb nkab steel mus rau qib ST3. Ntxuav thiab roughen qhov feem ntawm lub hau dej tsis sib tshooj ntawm cov yeeb nkab tiv thaiv sab nraud. Tom qab ntawd, preheat cov yeeb nkab steel thiab qhov chaw roughened mus rau kwv yees li 50 degree, ntxig rau cov dej tsis muaj hau, thiab cua sov thiab shrink nws tusyees circumferentially kom txog thaum lub kub yaj nplaum overflows tusyees. Siv lub siab rau cov menyuam kom paub meej tias haum.
Waterproof kaus mom kuj muaj lawv cov xwm txheej. Qhov ntev -lub sij hawm kub tsis kam txwv ntawm polyethylene tshav kub-shrinkable waterproof caps yog kwv yees li 80℃. Thaum qhov nruab nrab kub siab tshaj 80 degree, lwm yam kawg -fim waterproofing txoj kev, xws li waterproof adhesive los yog waterproof ntaub npog, yuav tsum tau xaiv raws li kev khiav hauj lwm tej yam kev mob. Tsis tas li ntawd, lub kaus mom tsis muaj dej tsis tuaj yeem hloov cov qauv sib khi ntawm qhov sib koom ua ke. Tom qab kev teeb tsa cov yeeb nkab, lub hau dej tsis zoo ntawm qhov kawg yuav raug txiav tawm thiab rov ua dua los ntawm kev sib koom ua ke. Txawm li cas los xij, thaum lub sij hawm kev thauj mus los, kev cia, thiab kev teeb tsa, nws tiv thaiv kab hauv qab ntawm tag nrho cov yeeb nkab zoo -thaum dej nkag mus rau qhov kawg, tag nrho cov yeeb nkab txheej rwb thaiv tsev yuav puas, thiab qhov teeb meem no feem ntau tshwm sim tom qab ua haujlwm. Lub kaus mom me me dej tsis muaj dej ua lub luag haujlwm tseem ceeb hauv cov txheej txheem no.