Muaj qee qhov sib txawv ntawm qhov vuam ntawm PE hluav taws xob fusion fittings thiab vuam ntawm PE kub yaj pob tw fittings. Kub yaj pob tw fittings yog taw tes rau taw tes kub yaj vuam, thaum hluav taws xob fusion fittings yog ntsej muag vuam. Yog li ntawd, thaum vuam hluav taws xob fusion fittings, cov cuab yeej tshwj xeeb yuav tsum tau siv los txhuam cov oxide txheej ntawm cov khoom siv los ntawm 0 1-0.3 millimeters ua ntej; Qhov saum npoo yuav tsum huv thiab tsis muaj impurities. Ua li no, kev sib txuas ntawm cov kav dej thiab fittings yog qhov ruaj khov thiab ruaj khov.
Ib-theem vuam txoj kev (xws li reflow tiav txoj kev) los yog ob-theem peb-theem vuam txoj kev (piv txwv li stepwise vuam txoj kev) yog ib tug nquag siv txoj kev rau electrofusion yeeb fittings. Ob txoj kev vuam saum toj no muaj peb qhov sib txawv, raws li hauv qab no:
Firstly, cov kev cai tsim nyog rau ob yog txawv:
1. Cov kev cai tsim nyog rau ib-theem vuam txoj kev (piv txwv li qhov kawg ntawm reflow welding): Thaum lub vuam pas nrig txav mus rau qhov kawg ntawm cov hlaws vuam, nws tuaj yeem nres mus rau pem hauv ntej, tab sis tsis txhob tua lub arc. Hauv qhov no, lub kaum sab xis ntawm kev pab yuav tsum tau hloov kom tsim nyog. Lub vuam pas nrig nres nyob rau hauv txoj hauj lwm thiab tig mus rau txoj hauj lwm A. Thaum lub qhov arc puv lawm, lub vuam pas nrig txav rov qab mus rau txoj hauj lwm B Ces, maj mam tsoo lub arc kom tiav. Hom Z no haum rau alkaline vuam pas nrig.
2. Cov kev xav tau ntawm cov txheej txheem vuam peb-theem (piv txwv li cov txheej txheem welding step-by-step): faib tag nrho qhov ntev ntawm cov vuam mus rau ob peb ntu, vuam txhua ntu hauv ib ntus, thiab ua qhov kawg ntawm txhua ntu sib npaug nrog pib taw tes ntawm ntu dhau los. Yog tias qhov ntev ntawm txhua ntu tsis loj, thaum vuam mus txog qhov pib ntawm ntu dhau los, qhov ntsuas kub ntawm qhov pib tseem yog siab heev, yog li qhov kub sib txawv tsis loj heev.
Qhov no txhim kho qhov ntsuas kub tsis sib xws thiab txias, txo kev ntxhov siab thiab deformation tom qab vuam. Feem ntau, qhov ntev ntawm txhua ntu yog txwv rau qhov ntev ntawm cov welding pas nrig yog welded.
2, Cov yam ntxwv ntawm ob qhov sib txawv:
1. Cov yam ntxwv ntawm txoj kev vuam ib zaug (piv txwv li reflow soldering xov tooj): Yuav kom ua tau zoo thiab kev ua tau zoo ntawm vuam seam, muaj cov kev cai nruj heev ntawm cov ntsiab lus ntawm ntau yam hlau hauv cov tub ntxhais vuam, tshwj xeeb tshaj yog cov khoom siv vuam. cov ntsiab lus ntawm cov teeb meem impurities (xws li sulfur, phosphorus, thiab lwm yam), uas yog superior rau lub hauv paus hlau.
2. Cov yam ntxwv ntawm peb-theem vuam txoj kev (xws li step-by-step welding txoj kev): Txoj kev nruam vuam yog siv rau qhov ntev weld seam ntawm lub pob tw welded ib feem, uas yuav ua rau muaj kev cuam tshuam loj ntawm qhov welded. Yog tias muaj kev tso cai, kev siv vuam sib txuas tuaj yeem siv tsis tu ncua vuam, lossis sib txawv vuam cov lus qhia thiab ntu tuaj yeem siv rau vuam.
Thirdly, ob txheej txheem no txawv:
1. Ib theem vuam txheej txheem (xws li reflow tiav txoj kev): Lub hauv ntej kawg ntawm vuam pas nrig muaj ib tug chamfer ntawm txog 45 degree rau qhov yooj yim ntawm arc ignition. Nws muaj ib tug liab qab welding core ntawm tus Tsov tus tw, uas yog kwv yees li 1/16 ntawm tag nrho ntev ntawm lub vuam pas nrig, ua rau nws yooj yim rau lub vuam pliers clamp thiab ua hluav taws xob.
Txoj kab uas hla ntawm lub vuam pas nrig yog hais txog txoj kab uas hla ntawm cov tub ntxhais vuam, uas feem ntau yog 2, 2.5, 3.2, lossis 3, 4, 5, lossis 6 hli. Z feem ntau siv me me li 3.2, 4, lossis 5, thiab nws qhov ntev "L" feem ntau yog nyob nruab nrab ntawm 200-550mm.
2. Cov txheej txheem ntawm peb-theem welding (piv txwv li step-by-step welding): siv cov txheej txheem ntau txheej txheej txheej vuam lossis cov txheej txheem vuam. segmented multi-layer welding txoj kev yog faib cov welding ntev rau hauv ob peb luv welding txheej, thiab ces ua segmented vuam txheej los ntawm txheej; Cov txheej txheem welding ib kauj ruam yog los faib cov hlaws hlaws rau hauv ob peb luv luv weld hlaws, nrog rau txhua qhov vuam hlaws welded los ntawm sab nraub qaum mus rau pem hauv ntej.
