Electric precipitation ash hopper material level over-limit alarm protection device

The invention discloses an electric precipitation ash hopper material level over-limit alarm protection device which comprises a dust remover body, fixed supports and a threaded rod, a second support is arranged in a first support, the fixed supports are arranged on the outer surface of the first support and the outer surface of the second support, and the threaded rod is connected between the fixed supports. According to the electric dust removal ash hopper material level over-limit alarm protection device, another set of equipment is additionally arranged on the basis of an original material level meter, whether the ash level reaches the position or not can be judged by ingeniously monitoring whether the certain height of the ash hopper is negative pressure or not, and the redundancy, reliability and accuracy of protection signals and alarm signals are greatly improved; a second support is arranged at the bottom of the first support, fixing supports are arranged on the outer surfaces of the first support an