Drainage device of valve

The utility model provides a drainage device of valve, include the valve body, install the valve rod inside the valve body and install the case on the valve rod, the valve body is inside be equipped with with the vice valve pocket of case complex, the case inserts the inside reciprocating motion who just does vertical direction for vice valve pocket of vice valve pocket, be equipped with the wash port of inside inlet opening of intercommunication valve body and the vice valve pocket of intercommunication on the case, the wash port is located inside the vice valve pocket all the time, be equipped with the water drainage tank who runs through valve body and the vice valve pocket of intercommunication on the valve body, water drainage tank and wash port cooperation can prevent like this that the internal ponding of low temperature valve from freezing, guarantee the normal work of valve, have also improved the life of valve. 本实用新型提供种阀门的排水装置，包括阀体、安装在阀体内部的阀杆以及安装在阀杆上的阀芯，所述阀体内部设有与阀芯配合的副阀腔，所述阀芯插入副阀腔内部且相对于副阀腔做竖直方向的往复运动