Ubungozi bokuphakama komthungo odityanisiweyo wombhobho odityanisiweyo

Ngophuhliso olukhawulezayo lomgangatho ophezulu wemveliso eqhubekayo yokuqengqeleka kunye nokuqhubela phambili kweteknoloji yokuwelda kunye nokuhlola, umgangatho we-welds uyaqhubeka uphucuka, kwaye kukho iintlobo ezininzi zemibhobho edityanisiweyo, ethathe indawo yemibhobho yentsimbi engenamthungo ngakumbi nangaphezulu. amasimi.Kwinkqubo yokuvelisa umbhobho odibeneyo, ukuqiniswa kwe-weld kuyinkcukacha ebalulekileyo.Ukomelezwa okugqithisileyo kombhobho odityanisiweyo kuneengozi ezininzi, ngolu hlobo lulandelayo:

Iintanda zoxinzelelo lwe-corrosion kulula ukwenza kwi-weld toe.Uxinzelelo loxinzelelo lwamalungu empundu lubangelwa ikakhulu kukuqiniswa kwe-weld.Kwi-weld ye-butt joints, uxinzelelo kwi-weld toe inkulu kakhulu.Uxinzelelo loxinzelelo luxhomekeke kwi-weld reinforcement h, Inzwane ye-weld iquka i-angle θ kunye ne-radius yekona r, ukwanda kwe-weld reinforcement h, ukwanda kwe-θ angle, kunye nokuncipha kwexabiso le-r, eliya kunyuka. into yoxinzelelo loxinzelelo.

Ukuphakama okungaphezulu kokuphakama kwe-weld, kokukhona kugxininise kakhulu uxinzelelo, kunye namandla okudibanisa okudibeneyo kuya kuncitshiswa.Emva kwe-welding, ukuphakama okungaphezulu kuya kucandwa.Ngethuba nje ukuphakama okugqithisiweyo kungabikho ngaphantsi kwezinto ezisisiseko, ukugxininiswa koxinzelelo kunokuncitshiswa, kwaye amandla okudibanisa okudibeneyo ngamanye amaxesha anokuphuculwa.

Ukuphakama okongeziweyo kwe-weld yangaphandle kukhulu, okuchaphazela ukuma kombhobho emva kokwandiswa kwe-hydraulic.Xa i-longitudinal submerged arc welded pipe yandiswa ngoxinzelelo lwamanzi, umbhobho wentsimbi ugqunywe ngumbumba wangaphandle kunye nomgodi wangaphakathi ofanayo kunye nobukhulu bokwandiswa kombhobho wensimbi.Ngoko ke, ukuba ukuqiniswa kwe-weld kukhulu kakhulu, uxinzelelo lwe-shear ngexesha lokwandiswa kwe-weld luya kuba lukhulu kakhulu, kwaye "imiphetho emincinci eqondileyo" iyakwazi ukubonakala kumacala omabini e-weld.Amava abonisa ukuba xa ukuqiniswa kwe-weld yangaphandle kulawulwa malunga ne-2mm, amanzi Akuyi kubakho "i-small edge straight" isenzeko xa ububanzi sanda, kwaye i-tube shape ayiyi kuchaphazeleka.Oku kungenxa yokuba ukuqiniswa kwe-weld yangaphandle kuncinci, kwaye uxinzelelo lwe-shear lwe-welded joint luncinci, ngokude nje ukuba uxinzelelo lwe-shear lungaphakathi koluhlu lwe-elastic deformation Emva kokukhulula, i-springback iyenzeka, kwaye umbhobho uya kubuyela kwindawo yokuqala. ilizwe.I-weld seam yangaphakathi iya kuba nokuphakama okukhulu okushiyekileyo, okuya kwandisa ilahleko yamandla kwi-medium yokuhambisa.Ukuba ubuso obungaphakathi bombhobho odityanisiweyo we-arc ontywiliselweyo wokuhambisa awuphathwanga ngonyango lokuchasana nomhlwa, kwaye umthungo we-weld wangaphakathi unokuphakama okukhulu okushiyekileyo, Ukumelana nokukhuhlana kwendlela yokuhambisa nayo inkulu, nto leyo eya kwandisa ukusetyenziswa kwamandla. umbhobho wokuhambisa.

Ubude obongezelelweyo bomthungo we-weld wangaphandle abuncedi ukulwa nokubola.Ukuba ilaphu leglasi ye-epoxy lisetyenziselwa ukunqanda ukubola ngexesha lokusebenza, ukuphakama okongeziweyo kwe-weld seam yangaphandle kuya kwenza ukuba inzwane ye-weld ibe nzima ukucinezelwa ngokuqinileyo.Kwangaxeshanye, okukhona umthungo we-weld uphezulu, kokukhona ungqindilili umaleko wokuchasana nomhlwa, kuba umgangatho umisela ukuba ubukhulu bomaleko ochasene nokubola bulinganiswa ngokusekelwe kwi-vertex yomthungo we-welding yangaphandle, okwandisa ixabiso le-anti-corrosion layer. -umhlwa.Ngexesha le-spiral submerged arc welding, i-"fish-back-shaped" i-welding seams yangaphandle ihlala ithande ukubonakala, nto leyo eyenza kube nzima ukuqinisekisa umgangatho wokuchasana nokubola.Ngoko ke, yilungise kakuhle Isikhundla sendawo yentloko ye-welding kunye neenkcukacha ze-welding nazo zibaluleke kakhulu ukunciphisa okanye ukuphelisa "i-fish-back shape" ye-welding seam yangaphandle.


Ixesha lokuposa: Jul-06-2021