Well drilling core storage box with adjustable inner diameter

The utility model discloses a drilling core storage box with an adjustable inner diameter, which comprises a storage box body and a first connecting rod, the upper part of the storage box body is rotatably connected with a cover plate, and the rear side of the storage box body is provided with a handle; the first connecting rod is installed in the storage box body, a positioning mechanism is arranged on the outer side of the first connecting rod, and the positioning mechanism comprises a positioning block, a reset spring and an adjusting rod; a clamping mechanism is arranged in the storage box body and comprises a supporting spring, a limiting plate, a clamping plate and a second connecting rod. Transparent observation windows are fixed in the cover plate at equal intervals, and name card cases are mounted above the transparent observation windows. According to the drilling rock core storage box with the adjustable inner diameter, the inner diameter can be adjusted according to the size of a rock core, it is