Shale pressure-maintaining closed full-diameter core water tank self-escaping oil gas visual experiment device

The invention relates to the technical field of shale oil reservoir development, in particular to a shale pressure-maintaining closed full-diameter rock core water tank self-escaping oil gas visualization experiment device which comprises an upper cover, an upper partition plate and a lower partition plate are correspondingly arranged in the upper cover and a lower tank at certain intervals, and the portion, making contact with a rock core, of the middle of each partition plate is a semicircular face; two air holes are formed between the two partition plates at the top end of the upper cover, bakelite plates with the same opening positions are arranged on the air holes, and a three-way valve and a ball valve are connected to the bakelite plates; telescopic brackets are arranged at two ends of the lower groove, and slots are formed around the lower groove; inserting strips are arranged on the periphery of the upper cover and correspond to the inserting grooves; a bottom support is arranged below the lower groo