Welding device and system applied to strain clamp

The invention provides a welding device and system applied to a strain clamp, and the device comprises a pipeline assembly which is used for accommodating welding flux and is provided with a first opening and a second opening; the heating assembly is used for heating the welding flux contained in the pipeline assembly; the pushing assembly comprises a driving motor and a rod body, the rod body is in transmission connection with the driving motor, and at least part of the rod body extends into the pipeline assembly through the first opening; the control circuit is electrically connected with the driving motor and used for driving the driving motor so that the driving motor can drive the rod body to move in the axial direction of the pipeline assembly and push the welding flux out of the second opening. And the conveying assembly is used for conveying the pipeline assembly, the heating assembly and the pushing assembly to the arrangement position of the strain clamp in the power transmission line network, so th