Unloading stop valve

The utility model discloses an unloading stop valve, its technical scheme main points include the valve body and with the valve gap of the up end butt of valve body, the upper end inboard of valve body is provided with supports the groove, be provided with the seal cover on the support groove, the upper end of seal cover with the top level of valve body, the lower extreme of valve gap is embeddedhave with the sealing washer of seal cover butt, the lower terminal surface of sealing washer is followed protrusion in the valve gap. The utility model discloses have at the solid fixed valve body during with the valve gap, at first install the seal cover supporting the inslot and playing the effect of support through supporting the groove to the seal cover, in addition through embedded sealing washer in the valve gap and seal cover butt, reduce valve body to valve gap apart from the time make the sealing washer take place deformation, inside the valve body is gone into to the part card of deformation, and then make