Detachable test panel fastening device for electrogas welding test

The utility model discloses a detachable test plate fastening device for a welding test of electro-gas welding, which is characterized by comprising a bottom plate, a vertical plate vertically arranged on the bottom plate, a lower bottom groove arranged at the lower part of the vertical plate, an upper cover plate movably arranged on the vertical plate and above the lower bottom groove, a test plate mounting groove clamped in the lower bottom groove, and a clamping groove arranged in the test plate mounting groove, bolts used for fastening the test plate are arranged on the test plate mounting groove and the upper cover plate respectively, and a welding tractor walking track is arranged on the side face of the upper cover plate and the side face of the lower bottom groove. The structure of the utility model is combined with an electro-gas welding machine, so that the perpendicularity of test panel assembly can be ensured. Quick assembly and disassembly can be realized, and welding of extra-thick steel plates