Kev Paub Txog Rail Pad Aging Inspection thiab Hloov
Yuav ua li cas txhawm rau txheeb xyuas hauv qab -rail puag phaj aging ntawm -qhov chaw nrog txoj kev yooj yim?
Elasticity tuaj yeem txiav txim siab los ntawm kev sim nias: nias lub hauv paus phaj tawv nrog ntiv tes. Yog hais tias qhov rov qab qeeb thiab pom tseeb indentation tseem nyob tom qab 3 vib nas this, nws qhia tau hais tias elasticity tau attenuated thiab aging tau tshwm sim. Kev kuaj pom pom tuaj yeem tshawb xyuas cov kab nrib pleb ntawm qhov chaw; Cov kab nrib pleb ntev dua 5 hli los yog suav txog ntau dua 10% ntawm thaj chaw yog cov laus laus, thiab los ntawm cov kab nrib pleb yog cov laus laus. Ntsuas lub thickness nrog calipers; Yog hais tias lub thickness txo los ntawm ntau tshaj 10% piv nrog tus nqi qub, nws txhais tau tias hnyav hnyav thiab kev laus thiab yuav tsum tau hloov. Coj mus rhaub lub hauv paus phaj maj mam mloog lub suab: cov laus puag daim hlau ua lub suab "ding-ding" vim muaj zog ntxiv, thaum cov tshiab ua suab "dong-dong" dull. Ua ke nrog kev hloov xim saum npoo, cov roj hmab hauv paus daim hlau hloov ntawm lub teeb daj mus rau xim av tsaus tuaj yeem pib txiav txim rau kev laus.
Dab tsi yog qhov txawv ntawm hardness aging qauv rau hauv qab -rail base plates ntawm cov khoom sib txawv?
Tus qauv hardness ntawm roj hmab puag daim hlau yog Shore A 60-70 degrees, thiab yuav tsum tau hloov yog hais tias lub hardness hloov los ntawm ntau tshaj ± 15 degrees tom qab laus (piv txwv li, qis dua 45 degrees lossis siab dua 85 degrees). Tus qauv hardness ntawm HDPE puag daim hlau yog Shore D 60-70 degrees, thiab kev laus yog qhia thaum lub hardness siab tshaj 80 degrees los yog qis dua 50 degrees. Cov txheej txheem hardness ntawm cov roj hmab saum npoo ntawm cov phaj sib xyaw yog Shore A 55-65 degrees, thiab hauv qab HDPE txheej yog Shore D 65-75 degrees. Txhua txheej uas muaj zog heev yog txiav txim raws li kev laus. Qhov laj thawj tseem ceeb rau kev hloov pauv hardness yog qhov degradation ntawm cov qauv sab hauv ntawm cov khoom, xws li poob ntawm plasticizer hauv roj hmab lossis kev tawg ntawm molecular chains hauv HDPE. Thaum kuaj, 5 cov ntsiab lus xeem yuav tsum raug xaiv sib npaug ntawm lub hauv paus phaj saum npoo, thiab qhov nruab nrab tus nqi yuav tsum tau siv los ua qhov kev txiav txim siab kom tsis txhob muaj qhov yuam kev hauv zos.
Dab tsi yog cov kauj ruam tshwj xeeb rau kev ntsuam xyuas elastic rov qab los ntawm hauv qab - cov phiaj xwm tsheb ciav hlau?
Ua ntej, xaiv 100mm × 100mm lub hauv paus phaj qauv kom paub tseeb tias tsis muaj cov kab nrib pleb lossis puas. Thov 50% ntawm qhov ntsuas load (50KN rau cov roj hmab hauv paus phaj, 80KN rau HDPE puag daim hlau) nrog lub tshuab ntsuas siab thiab tuav rau 30 feeb. Tom qab tshem tawm, cia nws sawv ntsug li 1 teev thiab ntsuas qhov tuab ntawm cov qauv hloov. Lub elastic rov qab tus nqi yog xam raws li (thickness tom qab unloading - thickness tom qab loading)/( qub thickness - thickness tom qab loading) × 100%. Roj hmab puag daim hlau nrog cov elastic rov qab tus nqi siab dua los yog sib npaug li 80% yog tsim nyog, HDPE puag daim hlau Ntau tshaj los yog sib npaug rau 75% yog tsim nyog, thiab composite puag phaj siab dua los yog sib npaug rau 78% yog tsim nyog. Cov hauv qab no yuav tsum tau hloov.
Dab tsi yog qhov sib txawv ntawm kev hloov lub voj voog hauv qab - cov phiaj xwm kev tsheb nqaj hlau nyob rau hauv ib puag ncig kev pabcuam sib txawv?
Nyob rau hauv qhuav inland cheeb tsam nrog tsis muaj zog corrosion, lub voj voog ntawm cov roj hmab puag daim hlau yog 8-10 xyoo, HDPE puag daim hlau 15-20 xyoo, thiab composite puag daim hlau 12-15 xyoo. Nyob rau hauv cov ntug dej hiav txwv humidity nrog high humidity thiab ntsev cov ntsiab lus, hloov lub voj voog ntawm cov roj hmab puag daim hlau yog luv luv rau 4-6 xyoo, HDPE puag daim hlau 10-15 xyoo, thiab composite puag daim hlau 8-12 xyoo. Nyob rau hauv high-altitude cheeb tsam uas muaj zog UV hluav taws xob, EPDM roj hmab puag daim hlau muaj ib tug hloov lub voj voog mus txog 15-20 xyoo vim huab cua tsis zoo, thaum zoo tib yam roj hmab puag daim hlau yuav tsum tau hloov txhua txhua 6-8 xyoo. Vim muaj kev kub siab ntev, polyurethane hauv paus daim hlau ntawm cov tsheb ciav hlau hnyav muaj qhov hloov pauv ntawm 5-8 xyoo, uas yog kwv yees li 30% luv dua li cov kab zoo tib yam. Kev tsheb ciav hlau hauv nroog muaj cov neeg caij tsheb loj thiab nquag vibrations, yog li lub hauv paus hloov lub voj voog feem ntau yog 20% luv dua li ntawm cov pa tsheb ciav hlau.
Tom qab cov kab nrib pleb tshwm nyob rau hauv qab -rail base phaj, yuav ua li cas txiav txim seb nws puas yuav tsum tau hloov?
Yog tias qhov tawg ntev tshaj 6 hli lossis qhov dav tshaj 0.3 hli, nws tsis tuaj yeem kho thiab yuav tsum tau hloov ncaj qha; txwv tsis pub, nws yuav cuam tshuam rau kev poob siab absorbing nyhuv thiab bearing kev ruaj ntseg. Cov kab nrib pleb nrog qhov ntev tsawg dua lossis sib npaug ntawm 6 hli thiab qhov dav tsawg dua lossis sib npaug li 0.3 hli tuaj yeem kho tau, thiab cov phaj kho lub hauv paus tseem tuaj yeem tuav txog 80% ntawm qhov kev pabcuam qub. Yog hais tias qhov tawg yog nyob ntawm ntug ntawm lub hauv paus phaj los yog nyob rau hauv ib qho kev ntxhov siab - cheeb tsam, nws raug nquahu kom hloov nws txawm tias qhov loj me me, vim cov kab nrib pleb hauv cheeb tsam no yog qhov nthuav dav sai. Hnyav-load lossis siab- cov kab nrawm muaj cov kev xav tau siab dua rau kev ncaj ncees ntawm lub hauv paus phaj, thiab cov kab nrib pleb ntev dua 3 hli yuav tsum tau hloov kom tsis txhob muaj kev vibration ntau dhau. Lub hauv paus phaj kho yuav tsum tau rov qab- tshuaj xyuas kom muaj zog compressive thiab elastic rov qab tus nqi kom nws ua tau raws li cov qauv siv.