Follow-up gas protection device for thick plate ultra-narrow-gap laser welding with filler wire

A follow-up gas protection device for thick plate ultra-narrow-gap laser welding with a filler wire overcomes the disadvantages that a prior gas protecting arc welding device for the thick plate ultra-narrow-gap laser welding with the filler wire is not stable in protection effect and can not meet full-automatic welding and provides a height self-adaption adjustment device for the gas protecting arc welding device. The height self-adaption adjustment device for the gas protecting arc welding device combines a height sensor and a height adjustment movement mechanism and is used for a thick plate structure ultra-narrow-gap laser-welding-with-filler wire weld pool and welding line gas protection.