Modular machining structure applied to floating stoplog gate

The invention belongs to the technical field of floating stoplog gate machining, and particularly relates to a modular machining structure applied to a floating stoplog gate, the modular machining structure comprises a sliding rail assembly and a mechanical force arm slidably connected to the sliding rail assembly, and the mechanical force arm is used for machining a floating stoplog gate body composed of a plurality of gate modules. A control block is arranged on the mechanical force arm, a welding head used for welding the gate module is movably arranged on the control block, a processing ring is arranged on the control block, and an output pipe is arranged on the processing ring. The interior of the processing ring is divided into a first cavity and a second cavity which are communicated with the output pipe through a blocking ring, the first cavity sucks and collects smell generated by welding from the output pipe through a negative pressure assembly, and the second cavity enables the output pipe to blow