Njira kuwotcherera zitsulo chitoliro

Mapaipi achitsulo opindika ozungulira onse amatengera njira yowotcherera arc pansi pamadzi, mipope yachitsulo yowongoka yowotcherera yamiza mipope yachitsulo yowongoka ya UOE yaifupi, ndi kuwotcherera kwa msoko wowongoka kwafupipafupi kwa ERW yaifupi.

Poyerekeza ndi kuwotcherera arc pansi pamadzi, chitoliro chachitsulo chokwera pafupipafupi (ERW chitsulo chitoliro) sichimawonjezera zida zilizonse zowotcherera panthawi yowotcherera.Choncho, weld wopangidwa ndi wogwirizana kwathunthu ndi mankhwala a m'munsi zitsulo.Chitoliro chachitsulo chikawotchedwa, chimapangidwa kuti chipangitse kupsinjika kwamkati kwa ntchito yozizira, ndipo kupsinjika kwamkati kwa kuwotcherera kumapangidwa bwino, kotero kuti zida zonse zamakina a chitoliro chachitsulo cha ERW ndizabwinoko.Koma pakali pano, opanga omwe akuimiridwa ndi Shanghai Ellison ndi Guangdong Panyu Zhujiang Steel Pipe Factory amangopanga mapaipi omwe ali pansi pa φ355mm, ndipo mapaipi akuluakulu a gasi sangathe kusankhidwa.Longitudinal submerged arc kuwotcherera (UOE zitsulo chitoliro) amagwiritsa pambuyo kuwotcherera kuzizira ndondomeko yowonjezera chitoliro, kotero kukula kwa geometric wa UOE zitsulo chitoliro ndi zolondola, ndi khalidwe la mnzake pamene UOE zitsulo chitoliro chikugwirizana ndi zabwino. kuonetsetsa kuti kuwotcherera khalidwe.Mbali ya kupsinjika kwamkati imachotsedwa.Kuphatikiza apo, kuwotcherera mawaya angapo (mawaya atatu, mawaya anayi) amagwiritsidwa ntchito powotcherera chitoliro cha UOE.Njira yowotcherayi imapanga mphamvu zocheperako panthawi yowotcherera ndipo imakhala ndi mphamvu zochepa pagawo lomwe limakhudzidwa ndi kutentha kwazitsulo zoyambira.The post-pass kuwotcherera waya wa Mipikisano mawaya kuwotcherera angathandize kuthetsa nkhawa kwaiye pa kuwotcherera kwa waya wapita kuwotcherera, potero kuwongolera mawotchi katundu chitoliro zitsulo.

Poyerekeza ndi ozungulira welded chitoliro, kutalika kwa kuwotcherera msoko wa msoko wowongoka kumizidwa arc welded zitsulo chitoliro ndi lalifupi, kotero kuwotcherera zilema ndi zikoka ndi ochepa.Mu payipi yothamanga kwambiri, zitsulo zoyambira za chitoliro chowongoka cha msoko zimatha kukwaniritsa 100% akupanga cholakwika chozindikira mbale zachitsulo chimodzi ndi chimodzi, kukwaniritsa zofunikira za payipi yothamanga kwambiri pazitsulo zoyambira.Komabe, ngakhale kuti ntchito yonse ya chitoliro chachitsulo cha UOE ndi yabwino kuposa mapaipi ena achitsulo, mtengo wake wapamwamba umapangitsa ogwiritsa ntchito omwe alibe ndalama kuti akhumudwe.Ma welds a chitoliro chachitsulo chozungulira amagawidwa mu mawonekedwe ozungulira.Nthawi zambiri, chigawo chowotcherera cha chitoliro chachitsulo, kuphatikizapo malo omwe amakhudzidwa ndi kutentha, ndi gawo lomwe lili ndi zida zowonongeka zazitsulo zachitsulo, pamene kupanikizika kwakukulu kwa mkati kwa chitoliro cha chitoliro kumagawidwa motsatira njira ya axial, ndi ozungulira welded chitoliro adzakhala Mbali zofooka kupewa malangizo pazipita kupsyinjika mkati, potero kuwongolera ntchito chitoliro zitsulo.Komanso, chifukwa kuwotcherera msoko kupanga ozungulira zitsulo chitoliro ndi kutalika kwa kuwotcherera msoko, n'zovuta kuchita kunja odana dzimbiri, ndipo kusiyana akhoza kupangidwa pakati pa seams kuwotcherera awiri.Ukadaulo amatha kuthetsa odana ndi dzimbiri wa ozungulira zitsulo chitoliro.