The invention is applicable to the technical field of
coal screening and separation, and provides a multifunctional screening device for a
coal mine. The multifunctional screening device comprises a device body, wherein a receiving
system is arranged on the upper portion of the device body, a screening
system and a
control system are arranged in the device body, the screening
system is connected with a driving system, and a
pressure sensing system is arranged in the screening system; the
pressure sensing system comprises movable plates located in grooves, each movable plate is located on the lower portion of a
coal screening roller, second sliding grooves are formed in the two vertical side face walls of the inner side of each groove, second sliding blocks are arranged at the two ends of each movable plate, the second sliding blocks are movably connected with the interiors of the second sliding grooves, and a plurality of elastic elements are arranged on the lower portion of each movable plate; and a
pressure sensor is arranged on the lower portions of the elastic elements of each movable plate. Therefore, the multifunctional screening device is simple in structure and reliable in design, overload work of the device can be prevented, the service life of the device is prolonged, coal ash can be effectively reduced, the screening efficiency is improved, the
sieve length is shortened, and resources are saved.