Wellhead device for injecting aggregate into well from wellhead

The utility model relates to the drilling construction technology, in particular to a wellhead device for injecting aggregate into a well from a wellhead. The wellhead device comprises a grouting pipe, a slurry flowing pipe, an aggregate conveying pipe and a mixing pipe, the mixing pipe is vertically arranged, one end of the slurry flowing pipe and one end of the aggregate conveying pipe are respectively connected and communicated with a pipe opening in one end of the grouting pipe, and the other end of the slurry flowing pipe is communicated with the aggregate conveying pipe. The other ends of the aggregate conveying pipe and the slurry circulating pipe are respectively connected and communicated with the lower part of the mixing pipe, two ends of the aggregate conveying pipe are respectively provided with a first valve and a second valve, the middle section of the aggregate conveying pipe is provided with an aggregate inlet and is connected with an aggregate throwing funnel, and the slurry circulating pipe