Nrog kev txhim kho ntawm cov neeg lub neej, kev paub txog kev tiv thaiv ib puag ncig thiab kev txhawj xeeb txog kev noj qab haus huv, kev hloov pauv ntsuab hauv kev lag luam khoom siv hauv tsev tau pib hauv kev muab dej thiab dej ntws. Raws li ntau cov ntaub ntawv saib xyuas dej zoo, cov kav dej hlau txias-galvanized feem ntau xeb tom qab tsawg dua 5 xyoos ntawm lub neej ua haujlwm, thiab cov ntxhiab hlau hnyav heev. Cov neeg nyob hauv zej zog tau yws rau cov chaw haujlwm tsoomfwv ib qho tom qab ib qho, ua rau muaj teeb meem hauv zej zog. Piv nrog cov kav dej hlau ib txwm muaj, cov kav dej yas muaj cov yam ntxwv ntawm qhov hnyav sib dua, tiv taus corrosion, lub zog compressive siab, kev huv thiab kev nyab xeeb, tiv taus dej ntws tsawg, txuag hluav taws xob, txuag hlau, txhim kho ib puag ncig nyob, lub neej ua haujlwm ntev, thiab kev teeb tsa yooj yim. Nyiam los ntawm cov zej zog engineering thiab nyob hauv txoj haujlwm tseem ceeb heev, tsim kom muaj kev txhim kho tsis tsim nyog.

Cov yam ntxwv thiab daim ntawv thov ntawm cov yeeb nkab yas

﹝一﹞ Polypropylene yeeb nkab (PPR)

(1) Hauv cov haujlwm tsim kho thiab teeb tsa tam sim no, feem ntau ntawm cov cua sov thiab dej xa khoom yog PPR cov kav dej (daim). Nws qhov zoo yog yooj yim thiab ceev ceev teeb tsa, pheej yig thiab zoo rau ib puag ncig, lub teeb yuag, huv thiab tsis muaj tshuaj lom, tiv taus cua sov zoo, tiv taus corrosion, kev ua haujlwm zoo khaws cia cua sov, lub neej ntev thiab lwm yam zoo. Lub raj txoj kab uas hla yog ib qhov loj dua li lub npe txoj kab uas hla, thiab lub raj txoj kab uas hla tau muab faib ua DN20, DN25, DN32, DN40, DN50, DN63, DN75, DN90, DN110. Muaj ntau hom yeeb nkab fittings, tees, lub luj tshib, yeeb nkab clamps, reducers, yeeb nkab plugs, Yeeb nkab clamps, brackets, hangers. Muaj cov yeeb nkab txias thiab dej kub, cov yeeb nkab dej txias yog ib lub raj ntsuab strip, thiab cov yeeb nkab dej kub yog ib lub raj liab strip. Cov li qub suav nrog PPR pob li qub, lub ntiaj teb li qub, npauj npaim li qub, lub rooj vag li qub, thiab cov uas muaj PPR khoom siv thiab tooj liab core sab hauv.

(2) Cov txheej txheem txuas yeeb nkab suav nrog kev vuam, kub yaj thiab kev sib txuas xov. PPR yeeb nkab siv kev sib txuas kub yaj kom ntseeg tau tshaj plaws, yooj yim rau kev khiav lag luam, cua zoo nruj, thiab lub zog interface siab. Kev sib txuas yeeb nkab siv lub tshuab sib txuas tes tuav rau kev sib txuas kub-yaj. Ua ntej txuas, tshem tawm cov hmoov av thiab cov khoom txawv teb chaws ntawm cov yeeb nkab thiab cov khoom siv. Thaum lub teeb liab ntawm lub tshuab qhib thiab ruaj khov, teeb tsa cov yeeb nkab (daim) kom txuas. DN <50, qhov tob ntawm kub yaj yog 1-2MM, thiab DN <110, qhov tob ntawm kub yaj yog 2-4MM. Thaum txuas, muab qhov kawg ntawm yeeb nkab tsis tig. Ntxig rau hauv lub tsho cua sov kom mus txog qhov tob uas tau teem tseg. Tib lub sijhawm, thawb cov yeeb nkab fittings rau ntawm lub taub hau cua sov yam tsis tig rau cua sov. Tom qab lub sijhawm cua sov tau mus txog, tam sim ntawd tshem tawm cov yeeb nkab thiab cov yeeb nkab fittings ntawm lub tsho cua sov thiab lub taub hau cua sov tib lub sijhawm, thiab ntxig lawv mus rau qhov tob uas xav tau sai thiab sib npaug yam tsis tig. Ib lub flange sib xws tau tsim ntawm qhov sib koom ua ke. Thaum lub sijhawm cua sov teev tseg, qhov sib koom ua ke tshiab tuaj yeem calibrated, tab sis kev tig yog txwv tsis pub ua. Thaum ua kom cov kav dej thiab cov khoom siv sov, tiv thaiv kom tsis txhob kub dhau thiab ua kom cov tuab nyias dua. Cov kav dej yuav ua rau cov yeeb nkab puas. Txwv tsis pub tig thaum lub sijhawm ua kom cov kav dej kub yaj thiab kho kom raug. Yuav tsum tsis txhob muaj nplaim taws qhib ntawm qhov chaw ua haujlwm, thiab txwv tsis pub ci cov kav dej nrog nplaim taws qhib. Thaum kho cov kav dej kub thiab cov khoom siv kom ncaj, siv lub zog me me kom tiv thaiv lub luj tshib kom tsis txhob khoov. Tom qab kev sib txuas tiav lawm, cov kav dej thiab cov khoom siv yuav tsum tau tuav kom nruj kom tswj tau lub sijhawm txias txaus, thiab tes tuaj yeem tso tawm tom qab txias mus rau qee qhov. Thaum cov kav dej PP-R txuas nrog cov kav dej hlau, cov kav dej PP-R nrog cov hlau ntxig yuav tsum tau siv ua kev hloov pauv. Cov kav dej thiab cov kav dej PP-R txuas nrog lub qhov (socket) kub yaj thiab txuas nrog cov kav dej hlau lossis cov khoom siv kho vajtse ntawm cov khoom siv huv. Thaum siv cov xov txuas, nws raug nquahu kom siv cov ntaub nplaum polypropylene raw khoom ua cov khoom ntim. Yog tias lub qhov dej txuas nrog lub pas dej mop, ntsia lub luj tshib poj niam (xov sab hauv) rau ntawm qhov kawg ntawm cov kav dej PPR rau ntawm nws. Tsis txhob siv zog ntau dhau thaum lub sijhawm teeb tsa cov kav dej, kom tsis txhob ua rau cov xov hlau puas tsuaj thiab ua rau xau ntawm qhov txuas. Kev txiav yeeb nkab kuj tseem tuaj yeem txiav los ntawm cov yeeb nkab tshwj xeeb: lub bayonet ntawm cov yeeb nkab txiab yuav tsum tau kho kom phim lub cheeb ntawm cov yeeb nkab uas raug txiav, thiab lub zog yuav tsum tau siv sib npaug thaum tig thiab txiav. Tom qab txiav, qhov tawg yuav tsum tau puag ncig nrog lub voj voog sib phim. Thaum cov yeeb nkab tawg, qhov seem yuav tsum perpendicular rau lub yeeb nkab axis tsis muaj burrs.

﹝ﺌ﹞ Cov Yeeb Nkab Polyvinyl Chloride Rigid (UPVC)

(1) Cov kav dej UPVC (daim) yog siv rau kev ntws dej. Vim nws qhov hnyav sib dua, tiv taus corrosion, muaj zog heev, thiab lwm yam, nws yog siv dav hauv kev teeb tsa cov kav dej. Hauv qhov xwm txheej ib txwm muaj, lub neej ua haujlwm feem ntau yog txog li 30 txog 50 xyoo. Cov kav dej UPVC muaj phab ntsa sab hauv du thiab tsis tshua muaj kev sib txhuam ntawm cov kua dej, uas kov yeej qhov tsis zoo uas cov kav dej hlau cam khwb cia cuam tshuam rau qhov ntws vim xeb thiab scaling. Lub cheeb tsam ntawm cov kav dej kuj tseem yog ib qhov loj dua li lub cheeb tsam nominal.Cov khoom siv yeeb nkabtau muab faib ua oblique tees, crosses, elbows, pipe clamps, reducers, pipe plugs, traps, pipe clamps, thiab hangers.

(2) Tso cov kua nplaum rau kev sib txuas. Yuav tsum tau co cov kua nplaum ua ntej siv. Cov kav dej thiab cov qhov (socket) yuav tsum tau ntxuav kom huv. Qhov sib txawv ntawm qhov (socket) me dua, qhov zoo dua. Siv daim ntaub emery lossis rab riam txiav kom ntxhib qhov sib koom ua ke. Txhuam cov kua nplaum nyias nyias sab hauv lub qhov (socket) thiab muab kua nplaum ob zaug rau sab nraud ntawm lub qhov (socket). Tos kom cov kua nplaum qhuav li 40-60 vib nas this. Tom qab muab tso rau hauv qhov chaw, yuav tsum tau ua tib zoo saib xyuas kom nce lossis txo lub sijhawm ziab kua nplaum raws li kev hloov pauv huab cua. Tsis pub dej thaum sib txuas. Cov kav dej yuav tsum tau muab tso rau hauv qhov av tom qab nws nyob hauv qhov chaw. Tom qab qhov sib koom qhuav lawm, pib rov qab txhaws. Thaum rov qab txhaws, sau cov xuab zeb ncig ntawm cov kav dej kom nruj thiab cia qhov sib koom ua ke rov qab txhaws ntau ntau. Siv cov khoom los ntawm tib lub chaw tsim khoom. Thaum txuas cov kav dej UPVC rau cov kav dej hlau, qhov sib koom ua ke ntawm cov kav dej hlau yuav tsum tau ntxuav thiab nplaum, cov kav dej UPVC raug cua sov kom mos (tab sis tsis txhob hlawv), thiab tom qab ntawd muab tso rau ntawm cov kav dej hlau thiab txias. Nws zoo dua los ntxiv lub clamp yeeb nkab. Yog tias cov yeeb nkab puas tsuaj rau thaj chaw loj thiab xav tau hloov tag nrho cov yeeb nkab, siv ob lub qhov (socket connector) los hloov cov yeeb nkab. Txoj kev siv tshuaj yaj (solvent method) siv tau los daws qhov xau ntawm cov tshuaj yaj. Lub sijhawm no, ua ntej tso cov dej hauv cov yeeb nkab, thiab ua kom cov yeeb nkab tsim lub siab tsis zoo, thiab tom qab ntawd txhaj cov nplaum rau ntawm qhov hws ntawm qhov xau. Vim yog lub siab tsis zoo hauv cov yeeb nkab, cov nplaum yuav raug nqus mus rau hauv qhov hws kom ua tiav lub hom phiaj ntawm kev tiv thaiv kev xau. Txoj kev siv daim nplaum feem ntau yog tsom rau kev xau ntawm cov qhov me me thiab cov pob qij txha hauv cov yeeb nkab. Lub sijhawm no, xaiv cov yeeb nkab ntev 15-20cm ntawm tib lub caliber, txiav lawv sib nrug, ua kom sab hauv ntawm lub plhaub thiab sab nraud ntawm cov yeeb nkab uas yuav tsum tau muab daim nplaum raws li txoj kev sib txuas cov pob qij txha, thiab npog thaj chaw xau nrog kua nplaum. Txoj kev siv iav fiber yog npaj cov kua nplaum nrog epoxy resin thiab tus neeg sawv cev kho. Tom qab muab cov kua nplaum rau hauv cov ntaub iav fiber, nws raug qhwv rau ntawm qhov chaw xau ntawm cov yeeb nkab lossis pob qij txha, thiab ua FRP tom qab kho. Vim tias txoj kev no muaj kev tsim kho yooj yim, thev naus laus zis yooj yim, cov nyhuv zoo thiab tus nqi qis, nws muaj kev txhawb nqa siab thiab siv tus nqi hauv kev tiv thaiv kev seepage thiab kev them nyiaj to.