Abstract: A floor cleaning device includes a brush assembly, a frame, a clean tank, a dirty tank, a suction assembly, a battery assembly and a control system. The frame is connected with the brush assembly. The clean tank is arranged on the frame and in a fluid communication with the brush assembly. The dirty tank is arranged on the frame and connected with the brush assembly. The suction assembly is arranged on the frame and connected with the dirty tank to form a negative pressure in the dirty tank and recover sewage after cleaning to the dirty tank. The battery assembly is arranged on the frame. The battery assembly at least includes a first/second battery pack. The control system controls the clean tank to supply water to the brush assembly and controls the suction assembly to recycle the sewage to the dirty tank.

Abstract: The present invention discloses a shed tunnel structure for preventing a falling rock, including a shed tunnel body and a buffer plate for bearing impact of the falling rock, where the shed tunnel body includes a first supporting structure, and the first supporting structure is arranged on a side away from a ramp; one end of the buffer plate is connected to the ramp; a side face of the buffer plate close to the shed tunnel body is in movable contact with the first supporting structure, and the contact position is close to the other end of the buffer plate. The objective of resisting continuous impact of the falling rock can be achieved through the structural design.

Abstract: The present invention discloses a shed tunnel structure for preventing a falling rock, including a shed tunnel body and a buffer plate for bearing impact of the falling rock, where the shed tunnel body includes a first supporting structure, and the first supporting structure is arranged on a side away from a ramp; one end of the buffer plate is connected to the ramp; a side face of the buffer plate close to the shed tunnel body is in movable contact with the first supporting structure, and the contact position is close to the other end of the buffer plate. The objective of resisting continuous impact of the falling rock can be achieved through the structural design.