What happens if you plug a 50 Amp RV into 22V welder plug

A dryer is only 30A, but a range would be 50A. If I remember, a house range does not require a separate ground so it is only a 3 prong, but a mobile home range does require a separate ground and I believe it uses the same receptacle as the RV pedestal.

I'm probably not saying this right, but the receptacle has two 50A 110VAC circuits - it's the welder that combines them to make it 220VAC. There should be no impact to the RV, as it will just use both legs as 110VAC.