Multi-channel ultrasonic detector

The utility model discloses a multi-channel ultrasonic detector which comprises a detector body, a detection display screen, a lifting handle, a detector base, a cleaning and covering mechanism, a supporting mechanism, a driving assembly and a limiting assembly, and the driving assembly and the limiting assembly are arranged in the detector base. The cleaning and shielding mechanism comprises a sliding groove formed in the side wall of the detector body, a cleaning and shielding plate slides on the inner side wall of the sliding groove, cleaning soft bristles are arranged on the inner side wall of the cleaning and shielding plate and tightly abut against the outer side wall of the detection display screen, and a threaded ring is fixedly installed on the side wall of the top end of the cleaning and shielding plate. Through the driving effect of the motor and the reciprocating thread arrangement of the threaded rod, the cleaning and screen display protection dustproof functions after the detector is used are ac