Movable sand mixing device

The invention relates to the technical field of mechanical device design, in particular to a movable sand mixing device. The movable sand mixing device comprises a supporting pillar and a sand mixing box. The supporting pillar is a cylinder with a large diameter. The whole device is supported on the ground through the supporting pillar. The sand mixing box is connected to the top of the supporting pillar. The movable sand mixing device further comprises a sand collecting port, a sand outlet nozzle, a gate valve and a handle. The sand collecting port is formed in the top end of the right side of the sand mixing box. The sand outlet nozzle is arranged at the bottom of the left side of the sand mixing box. The gate valve is arranged in the middle of the sand outlet nozzle and is controlled by the handle. A universal wheel is arranged at the bottom of each supporting leg, and the whole sand mixing device is convenient to move due to the arrangement of the universal wheels. A braking device is arranged on each uni