Portable ground wire duct junction box cover plate device

The utility model belongs to the technical field of building construction, and particularly relates to a portable ground wiring duct junction box cover plate device which is used for being installed at a reserved ground wiring duct junction box opening of a floor slab on a construction site, is larger than the ground wiring duct junction box opening and comprises a hot-rolled threaded steel cover plate, a rhombic stainless steel spring, a main bolt, an upper nut and a lower nut. The upper nut and the lower nut are opposite in thread screwing direction and are respectively welded on the top surface and the bottom surface of the rhombic stainless steel spring; according to the ground wire duct junction box cover plate, the cover plate device is simple in structure, convenient to use and low in cost, the hot-rolled deformed steel bar cover plate is combined through the rhombus stainless steel spring, the main bolt and the two nuts with opposite threads, the hot-rolled deformed steel bar cover plate can be instal