Shore crane weighing device

A quay crane weighing device comprises a quay crane and a wagon balance, the wagon balance is arranged on the ground on one side of the quay crane, limiting sensors used for detecting goods are installed at the two ends and in the middle of the wagon balance, and a crane scale used for weighing the goods is further installed on a hoisting mechanism of the quay crane. A safety steel wire rope is fixedly connected between the lifting hook of the crane scale and the lifting hook of the lifting mechanism of the quay crane; a weighing control box is installed in a cab of the quay crane, a central processing unit is installed in the weighing control box, the wagon balance, the limiting sensor and the crane scale are all connected with the input end of the central processing unit, and a displayer and an audible and visual alarm which are connected with the output end of the central processing unit are installed on the weighing control box. And a wireless communication module connected with the central processing uni