How strong is the winch handle installed on the rescue tripod

A rescue tripod is a simple bracket installed and fixed above a deep well or other limited rescue space. If it is only the tripod itself, it cannot complete the rescue task. A hand cranked winch must be installed on one of the brackets of the tripod, and the wire rope of the winch must be suspended in the lifting ring below the tripod cover, allowing the wire rope to rise or fall along the tension of the winch. Only in this way can the rescue task be successfully completed.

Therefore, to some extent, the handle of the winch on the rescue tripod controls the speed of releasing the steel wire rope. If the winch is used well, the rescue work will be smoother. If the winch is not used well, it may not only slow down the rescue work, but also cause the rescued person to collide with the surrounding wellbore. Firefighters are a group of people who use winches frequently. In order to complete rescue work correctly, effectively, and quickly, in addition to basic construction and operation procedures, they also need to understand the strength of the winch handle in order to balance the speed and safety of wire rope collection and release during rescue work.

To know the magnitude of the handle force of the rescue tripod winch, it is necessary to measure the average hand pulling force of the hand winch when it rotates through the right half circle and the left half circle during the lifting operation. This average value is the handle force, which should generally be less than or equal to 200N.