The invention relates to the technical field of
cement hoisting and discloses a hoisting stall self-locking device for
cement feeding. The hoisting stall self-locking device comprises an outer shaft,the inner wall of the outer shaft is connected with a clamping ring in a sleeved manner, the inner wall of the clamping ring is connected with a rotating shaft in a sleeved manner, a piezoresistor isfixedly connected to the middle portion of the inner wall of the rotating shaft, a return spring is fixedly connected to the middle portion of the inner wall of the rotating shaft, a positive pole plate is fixedly connected to the middle portion of the inner wall of the rotating shaft, a sliding block is movably connected to the middle portion of the inner wall of the rotating shaft, a dielectricplate is fixedly connected to the inner wall of the middle portion of the sliding block, and a negative pole plate is fixedly connected to the middle portion of the inner wall of the rotating shaft. According to the hoisting stall self-locking device for the
cement feeding, the rotating shaft drives the sliding block to move, the sliding block drives the
dielectric plate to move, then the positivepole plate and the negative pole plate are used in cooperation, so that the effect of controlling on-off of an
electromagnet is achieved, the
dielectric plate moves relatively, the relative area of the positive pole plate and the negative pole plate is gradually decreased, the
voltage between the two pole plates is decreased, at the moment, the working
voltage of the piezoresistor is reached, andthe
electromagnet is powered on to generate magnetic force repelling a
magnetic field and a magnetic block mutually.