Why dynamic block on Cad, change the name when import in sketchup

Hi All,
Can anyone help me with this subject? I would live to keep my dynamic block in Cad when importing into sketchup…I know sketchup don’t recognize dynamic block but…I need to have these blocks without exploding it…the reason been…I am planning to do is to have a 2d block, insert 3d inside that component…so next time when I import the same the cad file plan with the same block name into sketchup…it may recognize that same 2d block and automatically put the 3D instantly…not sure if its possible?
I did some test but its seem that when I imported the same block the name changes each time…

any help or advice? I hope i was clear on my description…
thks in advance!!