Gap caulking device and a caulking method

A gap caulking device, comprising two long plates (1), two short plates (2), a dial plate (3), a three-way joint (4), a tensioner (5) and a limit rod (6);

• the two long plates (1) hinged to each other and the two short plates (2) hinged to each other are hinged to form a closed quadrilateral structure with an adjustable angle, the dial plate (3) is connected to the two short plates (2), the three-way joint (4) matched with the two long plates (1) is arranged between a pin shaft (11) of the two long plates (1) hinged to each other, the tensioner (5) is arranged on a damping rod (21) on the two short plates (2) hinged to each other and is matched with the damping rod (21), a shape memory alloy wire (54) of the tensioner (5) is connected to the three-way joint (4), the limit rod (6) passes through the damping rod (21) and is in screw thread fit with the three-way joint (4), and the shape memory alloy wire (54) and the limit rod (6) are parallel to each other.