Double-weighing volume and density measuring device

The invention provides a double-weighing volume and density measuring device, double-weighing volume and density measurement is realized in single air fluid, the device comprises a sealed cabin and a loading device, the sealed cabin is communicated with a vacuum pump through a pipeline, the loading device comprises a feeding unit, a feeding unit and a weighing unit, and the feeding unit is communicated with the vacuum pump through a pipeline. The feeding unit comprises a station disc and a rotation driving mechanism for driving the station disc to rotate, the station disc is arranged in the sealed cabin, a power source of the rotation driving mechanism is arranged outside the sealed cabin, the feeding unit is used for transferring weights between the feeding unit and the weighing unit, and the feeding unit comprises a gripper, a sliding rack, a sliding mechanism and a lifting mechanism. The sliding rack is arranged in the sealed cabin, the gripper is connected to the sliding rack in a sliding mode, the slidin