CHECK VALVE CAPABLE OF IMPROVING RELIABILITY BY STRENGTHENING SUPPORTING FORCE OF A SHAFT AGAINST SHEARING FORCE OF REVERSE HYDRAULIC PRESSURE

摘要

PURPOSE: A check valve is provided to prevent loosening of bolts and nuts or weak of joining force of flanges by obtaining strong joining force because contact surfaces of both flanges are joined by bolts and nuts through keys and key grooves.;CONSTITUTION: A check valve(100) comprises flanges(131, 141). One flange is formed in a boss(113) turnably supporting a shaft(300). The other flange is formed in an output shaft of a gear box(400a). Keys(141a) are formed in the surface of one flange and key grooves(131b) are formed in the surface of the other flange. Both flanges are joined by bolts and nuts after connecting with the keys and the key grooves. One end of the boss is maximally projected into a pipeline(112). A sliding bearing(132) is installed in the inner diameter of the boss in the pipeline.;COPYRIGHT KIPO 2012