Abstract:This paper introduces the JiuLong river north stream in Fujian province water gate in the main canal of the entrance gate screw hoist for transforming object, simulation experiments by empirical research ,studies the shaft pin type weighing transducer as the core of the shaft pin load protection at the top of the screw hoist prevention brake accident protection application, solved the problems of accident prevention top screw hoist brake, perfected the floodgates integrated automation remote centralized control, to further improve lock management automation, informatization, intelligence is of important application value.