Three-pulley-block type elevating capacity detecting device of tower crane

The utility model discloses a three-pulley-block type elevating capacity detecting device of a tower crane, belongs to the detection of operation parameters of the tower crane and is applied to the field of an intelligent monitoring system of the tower crane. The three-pulley-block type elevating capacity detecting device mainly comprises three nylon pulleys, a pulley fixing baffle plate, a shaft pin type sensor, an installation fixing plate and a pulse type elevating capacity transmitter; the three-pulley-block type elevating capacity detecting device is characterized in that the three pulleys are fixed by one side of the pulley fixing baffle plate and are arranged in a triangular manner; two pulleys at the two sides are fixed on the pulley fixing baffle plate by pulley shafts; a pulley shaft of the middle pulley is a shaft pin type sensor pulley which is fixed at one side of the pulley fixing baffle plate by the installation fixing plate; the pulse type elevating capacity transmitter is arranged on the pull