Flame cutting device based on rapid lifting adjusting mechanism

The flame cutting device based on the rapid lifting adjusting mechanism comprises a plurality of flame cutting units transversely installed on an assembly frame at intervals, and each flame cutting unit comprises a gas preheating module, a cutting nozzle switching module and a flame cutting gun which are sequentially communicated downwards in the vertical direction; the gas preheating module and the cutting nozzle switching module are installed on the vertical guide rail in a sliding mode, a rapid lifting adjusting mechanism is arranged between the assembly frame and the vertical guide rail, and the rapid lifting adjusting mechanism is in transmission connection with the flame cutting gun through the gas preheating module or the cutting nozzle switching module. According to the flame cutting gun, the vertical height of the flame cutting gun can be rapidly adjusted, the size of a cutting seam is reduced, gas used for cutting can be preheated, the situation that the combustion heat value is reduced is avoided,