How to Prevent the Accident of Top Brake of Screw Hoist
If the gate is in the closing position, that is, the lower edge of the gate has touched the bottom of the gate, the suspender bolt on the screw is in the lower part of the long elliptical screw hole, and the stroke switch is still in the initial state, when the gate is opened, even if the direction is reversed (including the phase sequence change of the power supply), the accident will not occur, because the gate is not moved, the screw can still drop the trigger stroke switch. Actions, alarm signals to remind operators to stop misoperation or change the direction of operation, is an electric start-up and shut down automatically. When alarm signals and automatic shutdown are sent out, if the operator does not immediately correct the wrong operation (manual must be corrected immediately) or remove obstacles to reset the protective system, the alarm will continuously send out alarms. If the fault is not eliminated, the reset of the trip switch will not be able to repeat the start and close, so it can be effectively prevented. Accident of stop brake.
Protection measures for opening and closing of submerged gate without closed door force This kind of gate has been submerged for a long time, the screw hanger hole is still changed from round to long ellipse, but the position of the stroke switch needs to be installed above the highest water level, so the block should be changed into a force transfer rod, one end of the force transfer rod is welded on the gate hanger, and the force transfer rod is parallel to the screw with a ring and screw. The pole connection enables the transmission pole to move up and down in the ring. The length of the transmission pole should meet the maximum water extension. Besides strengthening the education of the operator's sense of responsibility and skill training, and requiring the operator to operate according to the opening and closing procedure, the key is to improve the technical measures to prevent the occurrence of the top gate accident.