External quanxitatively filling valve

The utility model relates to fluid filling equipment which solves the problem that when the existing quantitative mechanical filling valve fills liquid, the actual filling quantity of the liquid has large error with the rated filling quantity. The utility model comprises a valve body, a liquid filling valve rod, an operating mechanism, a head seat, a metering barrel and a filling pipe, wherein the hollow liquid filling valve rod is arranged in a valve chamber of the valve body; the outer wall of the liquid filling valve rod is provided with a groove and a feed inlet communicated with the inner chamber of the liquid filling valve rod; the upper end of the liquid filling valve rod is connected with the operating mechanism, and the lower end extends out of the valve body; a feed passage, a discharging passage and a filling passage which are communicated with the valve chamber are arranged in the head seat connected with the valve body; the filling passage is communicated with the bottom of the metering barrel through a filling pipe; the discharging passage is communicated with the metering barrel; an air outlet is arranged at the upper part of the metering barrel; the liquid filling valve rod can be driven to move up and down by the operating mechanism. The move of the liquid filling valve rod causes the feed passage to be communicated with the discharging passage through the groove or the filling passage to be communicated with the inner chamber of the liquid filling valve rod through the feed inlet. The utility model has high quantitative filling precision and can fill liquid with granules.