Umbhobho ojikelezayo, ekwaziwa ngokuba ngumbhobho wentsimbi ojikelezayo okanye umbhobho odityanisiweyo wentsimbi, yintsimbi enekhabhoni ephantsi okanye icwecwe lentsimbi yolwakhiwo olusezantsi eqengqeleke kwityhubhu engenanto kwi-engile ethile ye-helical (ebizwa ngokuba yi-engile yokubumba), eyaziwa ngokuba yityhubhu ejikelezayo okanye umzimba ojikelezayo. Idayamitha engaphandle yombhobho ojikelezayo imalunga neenanometer ezingama-30, idiameter yangaphakathi imalunga neenanometer ezili-10, yaye inowuthi phakathi kwespirals esecaleni kwayo imalunga neenanometer ezili-11.

Zeziphi iindlela zokuchonga ukuba umgangatho wemibhobho edityanisiweyo ye-spiral-diameter enkulu ikumgangatho ophezulu?

1. Ukuhlolwa ngendlela ebonakalayo: indlela yokuhlola umzimba yindlela yokulinganisa okanye yokuhlola ngokusebenzisa izinto ezithile ezibonakalayo.

2. Uvavanyo lwamandla omkhumbi wexinzelelo: Ukongeza kuvavanyo lokuqina, isitya soxinzelelo kufuneka siphinde sivavanye amandla. Ngokuqhelekileyo kukho iindidi ezimbini zovavanyo lwe-hydrostatic kunye novavanyo loxinzelelo lomoya. Bobabini bahlola ukuxinana kwee-welds kwiinqanawa kunye nemibhobho esebenza phantsi koxinzelelo. Uvavanyo loxinzelelo lomoya lunovakalelo kwaye lukhawuleza kunovavanyo lwehydraulic. Kwangaxeshanye, umbhobho odityanisiweyo we-diameter spiral welded emva kovavanyo awufuni ukugalelwa, ofaneleke ngakumbi kwiimveliso ezinobunzima bokuhambisa amanzi. Nangona kunjalo, umngcipheko wovavanyo mkhulu kunovavanyo lwe-hydrostatic. Ngexesha lovavanyo, amanyathelo obugcisa okhuseleko ahambelanayo kufuneka alandelwe ukukhusela iingozi ngexesha lovavanyo.
3. Uvavanyo lwe-Hydrostatic: Umbhobho ngamnye owenziwe nge-spiral we-diameter enkulu kufuneka ube phantsi kovavanyo loxinzelelo lwe-hydrostatic ngaphandle kokuvuza. Uxinzelelo lovavanyo lubalwa ngolu hlobo lulandelayo: P = 2ST / D.
Kwifomula, i-S-uxinzelelo lovavanyo lwe-Mpa yovavanyo lwe-hydrostatic, kunye noxinzelelo lovavanyo lovavanyo lwe-hydrostatic lukhethwa ngokwe-60% yexabiso lesivuno elichazwe kumgangatho ohambelana nentsimbi yentsimbi.

4. Ukugweba ukusuka kumphezulu, oko kukuthi, ukuhlolwa kwembonakalo, yindlela yokuhlola elula kwaye esetyenziswa ngokubanzi. Iyinxalenye ebalulekileyo yokuhlolwa kwemveliso egqityiweyo. Ikakhulu kukufumana iziphene kumphezulu we-weld kunye nokunxaxha kwe-dimensional. Ngokuqhelekileyo, ihlolwe ngamehlo anqunu, ngoncedo lweetemplates eziqhelekileyo, iigeji, iiglasi zokukhulisa kunye nezinye izixhobo. Ukuba kukho isiphene kumphezulu we-weld, kukho ukwenzeka kwesiphene ngaphakathi kwe-weld.