Movable liquid-groove type calibrating device for liquid level meter

The utility model provides a movable liquid-groove type calibrating device for a liquid level meter, which is used for calibrating the liquid level meter. The device is characterized in that the bottom of a base (1) is provided with an adjustable bolt (2), and a driving motor (3) is arranged on the base (1) which is connected with a gearbox (6). A level bubble (4) and two vertical guide rails (7) are also arranged on the base (1), and a screw rod (8) is arranged on the gearbox (6). A movable platform (9) is provided with three holes which respectively penetrate through the two guide rails (7) and the screw rod (8), the hole penetrating through the screw rod (8) is provided with internal screw threads, and the movable platform (9) can vertically move following the rotation of the screw rod. A liquid groove (10) is fixed on the movable platform (9), and visible windows (12) are respectively arranged on liquid groove walls facing towards the guide rails (7). The outer sides of the visible windows (12) are respectively provided with image pickup devices (11), and the image pickup devices (11) are connected with a monitor (17). Standard rulers (13) are respectively inlaid on the guide rails (7), and the guide rails (7) and the screw rod (8) are fixed with a top plate (14). A calibrated liquid level meter (16) is formed by fixing a fixed pressing piece (15) on the top plate (14).