High-temperature coal gas pressure release valve with purging hole and cooling structure

The utility model discloses a high-temperature coal gas pressure release valve with a purging hole and a cooling structure. The utility model belongs to the technical field of valves, valve comprisinga valve body, the top of the valve body is fixedly connected with a valve seat; the top of the valve seat is detachably connected with a valve cover; a metal sealing ring is detachably connected to the joint of the valve seat and the valve cover; a rubber ring is adhered to the top of the valve seat; a nitrogen inlet is formed in one side of the surface of the valve seat; an annular groove is formed in the valve seat; a purging cooling structure is adopted; valve cover opening, high-temperature gas discharging process, damage of high-temperature gas to the rubber ring can be reduced through low-temperature nitrogen blown into the nitrogen inlet; the service life of the rubber ring is prolonged, the sealing effect of the rubber ring is improved, and when the valve cover is closed and the first-stage sealing surfac