Ib qho me me ntawm cov yeeb nkab sib txuas yuav tsis zoo li qhov xwm txheej ceev. Tab sis sab laug tsis muaj neeg saib xyuas, qhov xau qeeb tuaj yeem ua rau lub qab nthab, cov khoom khib nyiab, dej khib nyiab, thiab thaum kawg tig mus rau qhov tsis ua haujlwm loj. Threaded kev sib txuas yog muaj nyob rau hauv cov kav dej steel rau dej, cua, thiab roj. Thaum lawv pib xau, qhov ua rau feem ntau tsis yog qhov tsis paub tseeb-tab sis kho nws kom raug yuav tsum nkag siab tias qhov ua tsis yog thawj qhov.
Cov lus qhia no taug kev los ntawm cov laj thawj feem ntau threaded steel yeeb nkab pob qij txha xau, yuav ua li cas kuaj qhov teeb meem, thiab cov tswv yim ua kom tsis txhob xau kom zoo.
Yuav Ua Li Cas Ib Threaded Joint Yuav Tsum Seal
Ua ntej dhia mus rau hauv kev ua tsis tiav, nws yuav pab kom nkag siab tias kev sib txuas ntawm threaded ua haujlwm li cas. Thaum koj txiav threads rau hauv cov yeeb nkab steel (tapered threads, feem ntau NPT lossis BSPT), cov txiv neej threads yog tsim los rau wedge tawm tsam poj niam threads ntawm ib tug haum. Cov xov ib leeg tsis xau- pov thawj. Tias yog vim li cas koj thiaj li siv lub sealant-pipe dope los yog PTFE daim kab xev- txhawm rau sau cov kab hluav taws xob kab hluav taws xob los ntawm cov xov peaks thiab hav.
Lub sealant lubricates thaum sib dhos, tom qab ntawd kho lossis compresses los thaiv cov xau. Ib qho kev sib koom ua ke zoo nkaus li nruj ntawm qhov kawg ntawm taper, nrog li 2-3 threads tseem pom yav dhau los lub ntsej muag haum. Tshaj - zawm lossis qis dua - nruj ob qho tib si ua rau muaj teeb meem.
Feem ntau ua rau Leaks ntawm Threaded Joints
1. Sealant tsis txaus lossis tsis raug
Qhov laj thawj tshaj plaws. Qee tus installers hla sealant nkaus. Lwm tus siv hom tsis ncaj ncees lawm- qauv dawb PTFE daim kab xev rau cov dej ntawm cov roj kab, lossis daim kab xev nyias uas tawg thaum sib dhos. Cov yeeb nkab dope uas tau qhuav tawm los yog siv dhau thinly kuj ua tsis tau.
Kho:Disassemble, ntxuav cov sealant qub, thiab rov- siv cov sealant kom raug rau kev pabcuam (ntaus, dej, roj, ncu). Siv tsawg kawg yog peb mus rau tsib daim ntaub qhwv zoo PTFE daim kab xev, los yog lub siab dawb paug, txawm tias lub tsho tiv no ntawm cov yeeb nkab dope.
2. Tshaj- nruj
Ntau tus neeg ntseeg tias nruj dua yog qhov zoo dua. Nrog tapered threads, tshaj -tightening stretches tus poj niam haum, feem ntau tawg nws (tshwj xeeb tshaj yog cam khwb cia hlau los yog tooj dag fittings). Txawm tias tsis muaj kev tawg, dhau - zawm tuaj yeem cuam tshuam cov xov, ua rau lub sealant nyem tawm thiab tawm hauv cov hlau - mus rau - hlau tiv tauj uas xau.
Kho:Kawm tus qauv: tes- nruj ntxiv rau 1–2 tig nrog ib tug ciaj ntswj, mus txog rau qhov chaw uas haum haum. Tsis txhob yuam kom haum yav dhau los 3 tig dhau tes- nruj.
3. Hauv qab - nruj
Qhov teeb meem rov qab. Yog tias qhov sib koom ua ke tsis tau ua kom deb txaus, cov xov taper tsis tau koom nrog, tawm hauv qhov sib txawv uas sealant tsis tuaj yeem txuas.
Kho:Tighten ntxiv. Yog hais tias qhov haum hloov tau yooj yim, nres thiab nruj kom txog thaum qhov kev tawm tsam nce thiab qhov sib koom ua ke zoo li ruaj khov.
4. Cov xov puas
Cov xov tuaj yeem raug puas tsuaj thaum txiav (dull tuag, tsis raug ceev), thaum thauj khoom, lossis thaum sib dhos (hla- xov). Cov xov puas yuav tsis kaw kom zoo txawm tias muaj cov sealant zoo.
Kho:Cov burrs me tuaj yeem raug ntxuav nrog cov ntaub ntawv lossis xov rov qab. Kev puas tsuaj loj yuav tsum tau txiav cov xov puas lawm thiab rov- xov, lossis hloov cov yeeb nkab lossis haum.
5. Hom xov tsis zoo
NPT (National Pipe Taper) yog tus qauv hauv North America. BSPT (British Standard Pipe Taper) yog siv rau lwm qhov. Sib tov lawv-hais tias, ib tug NPT txiv neej xov rau hauv BSPT poj niam haum- tsim ib tug tsis zoo haum uas yuav luag yuav luag.
Kho:Txheeb xyuas cov qauv xov sib phim. Siv xov adapters yog tias tsim nyog.
6. Cov kab nrib pleb hauv Fitting lossis yeeb nkab
cam khwb cia hlau los yog tooj dag fittings tuaj yeem tawg los ntawm ntau tshaj -tightening, khov kev puas tsuaj, lossis kev tsim khoom tsis raug. Cov yeeb nkab hlau tuaj yeem sib cais raws cov xov hauv paus yog tias cov yeeb nkab nyias nyias lossis qhov sib koom ua ke tag nrho dhau - nruj.
Kho:Ua tib zoo tshuaj xyuas. Cov kab nrib pleb feem ntau tshwm sim raws li cov kab zoo nyob ze ntawm lub hub haum los yog ntawm cov xov xov kawg. Hloov cov khoom tawg.
7. Cov yeeb nkab phab ntsa Thinning los ntawm Corrosion
Thaum lub sij hawm, sab hauv los yog sab nraud corrosion tuaj yeem nyias cov yeeb nkab phab ntsa tom qab cov xov. Cov hlau uas tseem tshuav yuav tsis muaj zog los tuav lub foob, thiab cov pa xau tuaj yeem pib los ntawm lub qhov pinhole lossis qhov tawg me me.
Kho:Txiav rov qab hla ntu corroded thiab rov- xov. Yog hais tias corrosion yog dav, hloov tag nrho cov kab.
8. Thermal Cycling lossis Vibration
Cov kav dej nthuav dav thiab cog lus nrog kev hloov pauv kub. Cov pob qij txha hauv cov tshuab uas voj voog los ntawm txias mus rau kub (xws li cov dej kub hauv tsev) tuaj yeem xoob me ntsis dhau ntau lub voj voog. Kev vibration los ntawm lub twj tso kua mis lossis cov cuab yeej nyob ze tuaj yeem ua haujlwm sib koom ua ke.
Kho:Re-Tighten qhov sib koom ua ke. Yog tias qhov teeb meem rov tshwm sim, ntxiv cov yeeb nkab txhawb nqa los yog kev sib txuas yooj yim kom nqus tau qhov txav mus los.
Yuav Ua Li Cas Diagnose Threaded Joint
Ua ntej rub tawm mus rau hauv qhov sib koom ua ke, xyuas qhov twg qhov xau tiag tiag tshwm sim.
① Qhuav qhov sib koom ua ke kom huv si nrog cov ntaub qhwv.
② Muab ib daim ntaub so ntswg los yog ntaub so ntswg nyob ib ncig ntawm lub pob qij txha. Cov dej xau yuav pom raws li qhov chaw ntub dej tsaus.
③ Saib saum qhov sib koom ua ke. Qee lub sij hawm dej ntws los ntawm qhov dej ntws ntau dua.
④ Rau cov pa xau, siv cov dej xab npum (cov tshuaj ntxuav tais diav thiab dej) txhuam ntawm qhov sib koom ua ke. Npuas qhia txog kev xau.
Yog tias qhov xau yog nyob ntawm lub cev haum (tawg) es tsis yog cov xov, koj yuav pom cov dej noo ntawm qhov haum nws tus kheej, tsis yog ntawm cov xov kab.
Kauj Ruam -los ntawm -Tib Fix rau Cov Xov Tooj Sib Txuas
Yam Koj Yuav Xav Tau:
Ob lub yeeb nkab wrenches (ib qho los tuav cov yeeb nkab, ib qho tig qhov haum)
Pipe dope lossis PTFE daim kab xev (siv hom raug rau koj cov kua dej)
Hlau txhuam los yog ntaub ntaub rau tu
Yeem: thread sealant remover, hloov haum yog tawg
Txheej txheem:
① Cais tawm thiab ntws tawm. Kaw dej los yog roj. Tso siab. Tshem cov kab hauv qab.
② Disassemble qhov sib koom ua ke. Siv ob lub dab teg- ib qho ntawm cov yeeb nkab, ib qho ntawm qhov haum- kom tsis txhob muaj kev ntxhov siab rau lwm cov pob qij txha. Tig counterclockwise kom loosen.
③ Tshawb xyuas cov xov thiab haum. Nrhiav kev puas tsuaj, tawg, lossis corrosion. Yog hais tias ib feem yog tawg los yog hnyav heev, hloov nws.
④ Ntxuav ob tus txiv neej thiab poj niam xov. Laus sealant yuav tsum tau muab tshem tawm tag nrho. Siv ib lub xov hlau txhuam los yog xov chaser. So kom huv nrog ib daim ntaub qhuav.
⑤ Siv cov sealant tshiab. Rau PTFE daim kab xev: qhwv clockwise (raws li koj fim cov yeeb nkab kawg) rau 3-5 qhwv, khaws daim kab xev rau ntawm threads nkaus xwb. Rau cov yeeb nkab dope: thov ib lub nyias, txawm lub tsho tiv no ntawm thawj 3-4 threads. Tsis txhob cia dope nkag mus rau hauv cov yeeb nkab.
⑥ Re- Sib sau ua ke. Xov los ntawm tes kom txog thaum snug. Tom qab ntawd nruj nreem nrog wrenches: feem ntau 1–2 tig dhau los txhais tes- nruj rau NPT txog li 1 nti. Cov kab loj dua tuaj yeem xav tau ntau dua, tab sis nres thaum tsis kam spikes.
⑦ Kev ntsuas siab. Maj mam rov-siab lub zog. Tshawb xyuas cov dej xau nrog cov ntaub so ntswg qhuav lossis dej xab npum. Yog tias nws ntws me ntsis, koj tuaj yeem zawm ntxiv 1/4 tig. Yog tias nws tseem xau tom qab ntawd, disassemble thiab xyuas seb puas muaj kev puas tsuaj lossis tsis raug sealant.
⑧ Ntxuav. So cov sealant ntau dhau los ntawm kev sib koom ua ke.
Thaum Hu Rau Tus Kws Tshaj Lij
Qee qhov xwm txheej yog qhov zoo tshaj plaws rau ib tus kws kho kav dej lossis tus kav dej muaj ntawv tso cai:
Cov yeeb nkab yog ib feem ntawm cov pa roj carbon monoxide lossis propane system (cov pa xau yog qhov txaus ntshai)
Cov yeeb nkab yog nyob rau hauv ib phab ntsa los yog qab nthab thiab yuav tsum tau qhib tiav
Cov dej xau yog nyob rau ntawm qhov siab -siab chav kab
Koj pom cov kab nrib pleb lossis xeb loj heev uas qhia txog qhov system- teeb meem thoob plaws
Koj tau sim kho ob zaug thiab qhov sib koom ua ke tseem xau
Tiv thaiv cov dej ntws yav tom ntej
Qee qhov kev coj ua yooj yim heev txo txoj hauv kev ntawm threaded sib koom ua ke:
Siv lub sealant zoo rau daim ntawv thov. Cov kab hluav taws xob xav tau cov pa roj- cov ntaub nplaum los yog dope. Cov kav dej uas muaj peev xwm xav tau NSF- pom zoo sealant.
Tsis txhob dhau - nruj. Siv ob lub wrenches. Nres thaum lub teeb pom kev zoo.
Tshawb xyuas cov xov ua ntej sib dhos. Yog tias lawv saib puas, rov- xov lossis hloov.
Txhawb cov kav dej kom zoo. Kev vibration thiab txav mus los loosen cov pob qij txha thaum lub sijhawm.
Xav txog lwm txoj kev koom nrog rau qhov tseem ceeb lossis nyuaj - mus rau - nkag mus rau qhov chaw. Xovxwm- haum lossis grooved kev sib txuas tsis muaj cov xov kom xau.
Summary Table: Ua rau thiab kho sai
|
Ua rau |
Kho ceev |
|
Tsis muaj los yog tsis ncaj ncees lawm sealant |
Disassemble, huv si, rov siv cov sealant kom zoo |
|
Tshaj - nruj |
Yog hais tias haum tsis tawg, reassemble nrog raug torque |
|
Hauv qab - nruj |
Tighten ntxiv (1–2 tig dhau tes-tight) |
|
Cov xov puas |
Ntxuav nrog xov restorer los yog re- txiav threads |
|
Cov xov tsis zoo (NPT vs BSPT) |
Siv cov adapter kom raug lossis hloov cov khoom siv |
|
Kev sib tsoo los yog cov yeeb nkab |
Hloov qhov tawg |
|
Corrosion thinning |
Txiav yav dhau los corrosion thiab rov- xov, lossis hloov kab |
|
Thermal cycling / kev vibration |
Re-nruj; ntxiv kev txhawb nqa lossis kev sib txuas yooj yim |
Xaus
Kev xau ntawm cov yeeb nkab steel threaded yog tsis tshua muaj qhov tsis paub. Feem ntau, qhov ua rau yog ib qho ntawm yim qhov teeb meem tshwm sim, nrog cov sealant tsis txaus lossis tsis raug thiab nruj nruj ua rau cov npe. Kev kuaj xyuas qhov xau kom raug-kom paub tseeb tias nws yog cov xov thiab tsis tawg - txuag kev siv dag zog. Kho nws kom raug txhais tau hais tias disassembling, tu, tshuaj xyuas, thiab rov sib dhos nrog cov sealant tshiab thiab lub zog kom zoo.
Nrog rau txoj hauv kev zoo, cov xov sib txuas tuaj yeem nyob twj ywm - pub dawb rau ntau xyoo. Thiab thaum muaj teeb meem tshwm sim, tam sim no koj muaj kev paub los daws lawv kom ntseeg siab.
Xav tau kev hloov fittings, sealants, lossis cov kws tshaj lij cov lus qhia rau koj cov kav dej?
Peb muaj ntau yam ntawm threaded steel yeeb nkab fittings, PTFE tapes, yeeb nkab dopes, thiab tshaj li qub. Peb pab pawg kws tshaj lij tuaj yeem pab koj xaiv cov khoom tsim nyog rau dej, roj, cua, lossis chav ua haujlwm.
Tiv tauj pebrau kev txhawb nqa khoom lossis thov kev tsocai.