Automatic negative pressure conveying device for carbon powder material

The utility model discloses an automatic negative pressure conveying device for carbon powder materials, which comprises a buffer storage box, a buffer storage tank, a weighing device and a vacuum pump, a feeding port is arranged at the top of the buffer storage box, a dust collecting device is arranged in the buffer storage box, and a discharging port is arranged at the bottom of the buffer storage box. The vacuum pump is connected with a feed port in the top of the buffer storage tank through a first pipeline, a first valve is mounted on the first pipeline, the vacuum pump is communicated with the buffer storage tank through a second pipeline, and a second valve is mounted on the second pipeline. A discharging port is formed in the bottom of the buffer storage tank and is conveyed to a use point through a third pipeline, a third valve is installed on the third pipeline, and the weighing device is located at the bottom of the buffer storage tank and the bottom of the buffer storage tank. 本实用新型公开了一种碳粉材料自动负压输送