K-qib cov kav hlau kav yog cais raws li lawv cov phab ntsa tuab siv cov txheej txheem txheem. Lawv tau siv dav hauv cov dej hauv nroog, dej ntws, cua sov, thiab hluav taws xob tiv thaiv engineering. Tus "K" sawv cev rau phab ntsa thickness coefficient; tus naj npawb loj dua, qhov tuab ntawm cov yeeb nkab phab ntsa, qhov muaj zog dua lub siab -cov kabmob muaj peev xwm, thiab qhov zoo dua ntawm cov qauv siv zog thiab ua haujlwm rau cov khoom siv sab nraud.
01. Cov yam ntxwv ntawm txhua qib
| qib | Phab ntsa thickness qib zoo (K tus nqi) | Cov yam ntxwv tseem ceeb | Siab tsis kam (kwv yees) | Standards thiab Market Situation |
| k7 qib | 7 | Phab ntsa thickness yog nyias, thiab lub siab - bearing muaj peev xwm kuj tsawg. | Tsawg dua lossis sib npaug li 1.0MPa | Tsis yog - cov khoom lag luam |
| k8 qib | 8 | Phab ntsa thickness thiab siab bearing muaj peev xwm nyob nruab nrab ntawm K7 thiab K9. | Tsawg dua lossis sib npaug li 1.25 MPa | Tsis yog - cov khoom lag luam |
| k9 qib | 9 | Cov khoom lag luam hauv teb chaws, phab ntsa tuab ua raws li cov qauv hauv tebchaws, thiab muaj kev kub siab ua haujlwm. | Ntau dua lossis sib npaug li 1.6 MPa | Cov qhab-nees teev nyob rau hauv lub teb chaws tus qauv (GB) |
| K10 qib | 10 | Phab ntsa Thicker txhais tau tias muaj kev tiv thaiv siab dua. | Siab dua K9 qib | Cov khoom txheem, haum rau cov xwm txheej siab dua |
| k12 qib | 12 | Thickest phab ntsa, muaj zog tshaj lub siab tsis kam | Siab tshaj | Cov khoom lag luam txheem, haum rau ultra- cov ntawv thov siab. |
02. Cov Ntsiab Lus Paub thiab Xaiv Cov Ntsiab Lus
Phab ntsa thickness xam: Phab ntsa thickness ntawm tag nrho cov K-qib kav ua raws tib cov qauv: e=K × (0.5 + 0.001 × DN). Qhov twg e yog tus qauv phab ntsa thickness (unit: mm), DN yog lub nominal txoj kab uas hla (unit: mm), thiab K yog phab ntsa thickness qib coefficient nyob rau hauv lub rooj. Rau K9 qib ductile hlau kav, cov qauv no yog siv rau phab ntsa thickness xam, thiab tus nqi K yog 9.
Kev sib raug zoo ntawm qib txheej thiab corrosion kuj: tej zaum koj yuav xav tias cov phab ntsa tuab txhais tau hais tias zoo dua corrosion kuj, tab sis qhov tseeb, corrosion kuj feem ntau yog nyob ntawm sab hauv thiab sab nrauv los tiv thaiv -corrosion txheej ntawm cov kav dej (xws li cov cement hauv ob sab phlu, sab nrauv zinc txheej nrog asphalt xim, thiab lwm yam), es tsis yog phab ntsa thickness qib nws tus kheej. Yog li ntawd, thaum xaiv, nws yog ib qho tsim nyog los txiav txim siab txog yam yuav tsum tau muaj los tiv thaiv - xeb txheej raws li qhov chaw tshwj xeeb hauv cov kav dej, uas txawv ntawm kev xaiv phab ntsa thickness qib.
03. Yuav ua li cas xaiv cov qib tsim nyog
Ntawm cov qib K ntau yam ntawm cov kav hlau kav, K9 qib yog ib qho tseem ceeb sib faib kab.
Qib K9 yog qhov zoo dua: Rau feem ntau ntawm cov haujlwm engineering hauv nroog, K9 qib yog qhov feem ntau thiab muaj kev ua tau zoo tshaj plaws vim nws qhov kev ua tau zoo sib luag thiab kev ntseeg tau ua raws li cov qauv hauv tebchaws.
Cov kev cai tshwj xeeb hu rau kev xaiv tshwj xeeb: Yog tias tus qauv tsim siab tshaj 1.6 MPa, lossis muaj cov kev xav tau siab heev rau cov yeeb nkab rigidity, K10 lossis K12 tuaj yeem txiav txim siab. Hloov pauv, rau qee qhov qis- cov ntawv siv siab (xws li sab hauv qis- kev xa dej siab), K8 lossis K7 qib yuav raug siv los tswj cov nqi, tab sis nws yuav tsum tau muab sau tseg tias cov no tsis yog- cov khoom lag luam, thiab lawv cov khoom zoo thiab sib xws yuav xav tau kev saib xyuas ntxiv.
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