The scale calibration device comprise a hopper scale and a counterweight, wherein that hop scale is arranged in the middle of a weighing station bracket, the weighing hopper and the weigh station are connected through a weighing module, an installation frame is fixed on the outer surface of the weighing hopper, and a cylinder driver is installed on the installation frame; The weight piece comprises a plurality of weights, the central axes of the weights are coincident with each other with a certain distance, the lowest weight is connected with the driving end of the cylinder driver through a movable hook, and the cylinder driver can combine the weights by driving the lowest weight to move up by different distances, so as to adjust the weight of the weighing bucket. By using the weight parts corresponding to the weight in the weighing state, the weighing hopper has higher accuracy in weighing materials, and in the use process, it is not necessary to manually lift the weight with the required weight to each weighing hopper for scale calibration operation, which saves a lot of labor and has relatively high efficiency.

The scale calibration device relates to the technical field of hopper scales, and comprises a supporting part and a connecting part, which are mutually connected and fixed to form a whole; the supporting part is used for placing weights, and the connecting part is used for fixing on a silo; the supporting part surrounds the periphery of the silo; during scale calibration, the connecting part is fixed on the silo; the scale calibration device is symmetrically arranged on the silo; the supporting part provides space for placing weights; the weights are uniformly placed around the silo; the materials in the silo are replaced by weights; and the weight is weighed by a dynamometer. By arranging the placing space on the periphery of the silo, the weights can be placed without occupying the space of the silo itself, and it is convenient to calibrate the silo with a large range.