Special drawing box for hydrogeological survey

The utility model discloses a special drawing box for hydrogeological survey, which belongs to the technical field of drawing boxes, and comprises a box body and a top cover, the inner side wall of the box body is fixedly connected with four groups of telescopic sleeve rods, one end of each telescopic sleeve rod extends out of the box body, and the other end of each telescopic sleeve rod is fixedly connected with a gasket; the outer side wall of the telescopic sleeve rod is fixedly connected with a bolt, one end of the bolt extends out of the box body, the outer side wall of the top cover is fixedly connected with four sets of clamping mechanisms, each clamping mechanism is composed of a pressing block, a rubber pad, a shifting piece, a limiting block, a spring and a fixing shell, and the outer side wall of the top cover is fixedly connected with the fixing shell. The inner side wall of the fixing shell is fixedly connected with a spring, and one end of the spring is fixedly connected with a pressing block. T