Ungakhetha kanjani izinto zokushisela ama-valve?

I-Welding isetshenziselwa ikakhulukazi ukushisela okungaphezulu kwe-valve sealing surface, ukulungisa ukushisela kokulimala kokukhipha kanye nokushisela okudingekayo ngesakhiwo somkhiqizo. Ukukhethwa kwezinto zokushisela kuhlobene nezindlela zayo zenqubo. Izinto ezisetshenziswa ku-electrode arc welding, i-plasma arc welding, i-arc welding engaphansi kwamanzi kanye ne-carbon dioxide gas shielded welding zihlukile. Indlela ye-welding evame kakhulu futhi evame ukusetshenziswa yizinto ezihlukahlukene ezisetshenziswa ekushiseni kwe-electrode arc. 01 Izimfuneko zokushisela ama-valve Ivalvu iyingxenye yepayipi lokucindezela. Izinga lekhono kanye nenqubo ye-welding ye-welder ithinta ngokuqondile umlingiswa womkhiqizo nokukhiqizwa kokuphepha, ngakho-ke kuyaphuthuma ukudinga ngokuqinile i-welder. I-Welding iyinqubo ekhethekile ebhizinisini lokukhiqiza ama-valve, futhi kufanele kube nezindlela ezikhethekile zenqubo ekhethekile, kuhlanganise nokuphathwa nokulawulwa kwabasebenzi, imishini, inqubo kanye nezinto zokwakha. Umshiseli uzodlula ulwazi oluyisisekelo kanye nokuhlolwa kokulawula kwangempela kokuhlolwa okulungile kwama-boiler kanye namashisela omkhumbi we-pressure, abambe isitifiketi (isitifiketi), futhi angahlanganyela ekusebenzeni kokushisela phakathi nesikhathi sokuqinisekisa. 02 Izidingo zesitoreji sama-electrode amavalvu 1) Naka umswakama osendaweni ukuze uvimbele induku yokushisela ekubeni manzi. Umswakama ohlobene emoyeni udingeka ube ngaphansi kuka-60% kanye nebanga elithile ukusuka phansi noma odongeni. 2) Hlukanisa imodeli yenduku yokushisela futhi ukucaciswa akufanele kudideke. 3) Ngesikhathi sokuthutha kanye nokupakisha, qaphela ukuthi ungalimazi ukugqoka, ikakhulukazi i-electrode yensimbi engenasici, i-electrode engaphezulu kanye ne-cast iron electrode. I-03 Ukulungiswa kwe-Welding ye-valve castings 1) Ukulungiswa kwe-welding kuvunyelwe ukufakwa kwe-valve ngokufakwa kwesihlabathi, ukuqhekeka, imbobo yomoya, imbobo yesihlabathi, ukuxega nokunye ukukhubazeka, kodwa ibala lamafutha, ukugqwala, umswakama kanye nokukhubazeka kufanele kususwe ngaphambi kokulungiswa kwe-welding. Ngemva kokukhipha iziphambeko, pholisha i-metal luster nge-sandpaper. Ukuma kwayo kufanele kube bushelelezi, kube nomthambeko othile futhi kungabi nemiphetho ebukhali. Uma kunesidingo, ukulawulwa okungabhubhisi kuzokwenziwa nge-powder noma ukungena kwe-liquid, futhi ukulungiswa kwe-welding kungenziwa kuphela uma kungekho ziphambeko. I-2) Ukulungisa i-welding akuvunyelwe uma kunemifantu ejulile engena, ukuvala okubandayo, izimbotshana zezinyosi, izindawo ezinkulu ze-porosity ekucindezelweni okuthwala insimbi, futhi azikho iziphambeko ezizosuswa noma izingxenye ezingakwazi ukulungiswa nokupholishwa ngemva kokulungiswa. ukushisela. 3) Inombolo yokulungiswa kwe-welding ephindaphindiwe ngemva kokuhlolwa kokuvuza kwegobolondo lensimbi yokufaka ingcindezi akufanele idlule kabili. 4) I-casting kumele ipholishwe isicaba futhi ibushelelezi ngemva kokulungiswa kwe-welding, futhi akukho mkhondo ocacile wokukhanda ozoshiywa. 5) Izidingo ze-NDT zokusanhlamvu ngemuva kokulungiswa kwe-welding zizosetshenziswa ngokuhambisana nezindinganiso ezifanele. 04 Ukwelashwa kwe-valve yokunciphisa ingcindezi ngemva kokushisela 1) Kokushisela okubalulekile, njengokushisela kwejakhethi efaka ukushisa okushisayo, ukushisela kwesihlalo se-valve esishunyekwe emzimbeni we-valve, indawo engaphezulu yokuvala edinga ukulashwa ngemuva kokushisela, kanye nokulungiswa kokushisela kwe-pressure bear. ama-castings adlula uhla olucacisiwe, ukucindezeleka kwe-welding kuzoqedwa ngemva kokushisela. Uma kungenakwenzeka ukungena esithandweni somlilo, indlela yokuqeda ukucindezeleka kwendawo nayo ingamukelwa. Inqubo yokuqeda ukucindezeleka kokushisela ingabhekisela kubhukwana lenduku yokushisela. I-2) Ukucindezeleka kokushisela kuzoqedwa ngemva kokushisela uma ukujula kokulungisa i-welding kudlula u-20% wodonga noma u-25mm noma indawo inkulu kuno-65C ㎡ kanye nokuvuza kokuhlolwa kwegobolondo. 05 Ukufaneleka kwenqubo yokushisela i-valve Ukukhethwa okufanele kwenduku yokushisela kuyisixhumanisi esibalulekile enqubweni ekhethekile yokushisela. Kuwukukhetha okulungile kuphela kwenduku yokushisela. Ngaphandle kwesiqinisekiso sezihloko ezedlule, akunakwenzeka ukuthola ikhwalithi enhle yokushisela. Njengoba izinga lokushisela le-electrode arc welding lihlukile kumingcele ebalulekile eshiwo yikhwalithi ye-electrode ngokwayo, ububanzi be-electrode, isisekelo sensimbi, ukushuba kwensimbi eyisisekelo, isikhundla se-weld, izinga lokushisa ngaphambi kokushisa kanye nokwamukelwa kwamanje, qaphela izinguquko zalezi zinto. imingcele ebalulekile. Emikhiqizweni yama-valve, ukufaneleka kwenqubo yokushisela kuhlanganisa ukuvelela kwendawo evalekile, ukushisela kwe-inlay kwesihlalo se-valve nomzimba we-valve kanye nokulungiswa kokushisela kwezingxenye zengcindezi. Ukuze uthole izindlela ezithile zokufaneleka kwenqubo, sicela ubheke esigabeni se-ASME IX sokushisela kanye nezinga lokufaneleka lokufaneleka kanye nezinga lemboni yemishini yaseChina i-JB / T 6963 fusion welding process process qualification yezingxenye zensimbi.