for i in NazvaniePodrazdelenia.objects.raw('SELECT id FROM modgen_NazvaniePodrazdelenia'):
		for j in NazvanieOtcheta.objects.raw('SELECT id FROM modgen_NazvanieOtcheta'):
			for p in SxemaOtcheta.objects.raw('SELECT * FROM modgen_SxemaOtcheta WHERE nazvanie_pod= %d, nazvanie_otch= %d',i,j):
				csv_data.append(p)
			csv_data.append('\n')
			for p in TableZnachenui.objects.raw('SELECT * FROM modgen_TableZnachenui WHERE nazvanie_pod=%d, nazvanie_otcheta=%d',i,j):
				csv_data.append(p)
			csv_data.append('\n')

ids = SomeModel.objects.values_list('id', flat=True)
for id in ids:
    <и так далее>